1 /** @file
2 * @brief SVG stylesheets implementation.
3 */
4 /* Authors:
5 * Lauris Kaplinski <lauris@kaplinski.com>
6 * Peter Moulder <pmoulder@mail.csse.monash.edu.au>
7 * bulia byak <buliabyak@users.sf.net>
8 *
9 * Copyright (C) 2001-2002 Lauris Kaplinski
10 * Copyright (C) 2001 Ximian, Inc.
11 * Copyright (C) 2005 Monash University
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #ifdef HAVE_CONFIG_H
17 # include "config.h"
18 #endif
20 #include <cstring>
21 #include <string>
23 #include "libcroco/cr-sel-eng.h"
24 #include "xml/croco-node-iface.h"
26 #include "svg/svg.h"
27 #include "svg/svg-color.h"
28 #include "svg/svg-icc-color.h"
30 #include "display/canvas-bpath.h"
31 #include "attributes.h"
32 #include "document.h"
33 #include "extract-uri.h"
34 #include "uri-references.h"
35 #include "uri.h"
36 #include "sp-paint-server.h"
37 #include "streq.h"
38 #include "strneq.h"
39 #include "style.h"
40 #include "svg/css-ostringstream.h"
41 #include "xml/repr.h"
42 #include "xml/simple-document.h"
43 #include "unit-constants.h"
44 #include "2geom/isnan.h"
45 #include "macros.h"
46 #include "preferences.h"
48 #include "sp-filter-reference.h"
50 #include <sigc++/functors/ptr_fun.h>
51 #include <sigc++/adaptors/bind.h>
53 using Inkscape::CSSOStringStream;
54 using std::vector;
56 #define BMAX 8192
58 class SPStyleEnum;
60 /*#########################
61 ## FORWARD DECLARATIONS
62 #########################*/
63 static void sp_style_clear(SPStyle *style);
65 static void sp_style_merge_property(SPStyle *style, gint id, gchar const *val);
67 static void sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent);
68 static void sp_style_merge_ifilter(SPStyle *style, SPIFilter const *parent);
69 static void sp_style_read_dash(SPStyle *style, gchar const *str);
71 static SPTextStyle *sp_text_style_new(void);
72 static void sp_text_style_clear(SPTextStyle *ts);
73 static SPTextStyle *sp_text_style_unref(SPTextStyle *st);
74 static SPTextStyle *sp_text_style_duplicate_unset(SPTextStyle *st);
75 static guint sp_text_style_write(gchar *p, guint len, SPTextStyle const *st, guint flags = SP_STYLE_FLAG_IFSET);
76 static void sp_style_privatize_text(SPStyle *style);
78 static void sp_style_read_ifloat(SPIFloat *val, gchar const *str);
79 static void sp_style_read_iscale24(SPIScale24 *val, gchar const *str);
80 static void sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict, bool can_explicitly_inherit);
81 static void sp_style_read_istring(SPIString *val, gchar const *str);
82 static void sp_style_read_ilength(SPILength *val, gchar const *str);
83 static void sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str);
84 static void sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str);
85 static void sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
86 static void sp_style_read_ifontsize(SPIFontSize *val, gchar const *str);
87 static void sp_style_read_ibaselineshift(SPIBaselineShift *val, gchar const *str);
88 static void sp_style_read_ifilter(gchar const *str, SPStyle *style, SPDocument *document);
90 static void sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr, gchar const *key, SPStyleEnum const *dict, bool can_explicitly_inherit);
91 static void sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key);
92 static void sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key);
93 static void sp_style_read_pbaselineshift(SPIBaselineShift *val, Inkscape::XML::Node *repr, gchar const *key);
94 static void sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key);
96 static gint sp_style_write_ifloat(gchar *p, gint len, gchar const *key, SPIFloat const *val, SPIFloat const *base, guint flags);
97 static gint sp_style_write_iscale24(gchar *p, gint len, gchar const *key, SPIScale24 const *val, SPIScale24 const *base, guint flags);
98 static gint sp_style_write_ienum(gchar *p, gint len, gchar const *key, SPStyleEnum const *dict, SPIEnum const *val, SPIEnum const *base, guint flags);
99 static gint sp_style_write_istring(gchar *p, gint len, gchar const *key, SPIString const *val, SPIString const *base, guint flags);
100 static gint sp_style_write_ilength(gchar *p, gint len, gchar const *key, SPILength const *val, SPILength const *base, guint flags);
101 static gint sp_style_write_ipaint(gchar *b, gint len, gchar const *key, SPIPaint const *paint, SPIPaint const *base, guint flags);
102 static gint sp_style_write_ifontsize(gchar *p, gint len, gchar const *key, SPIFontSize const *val, SPIFontSize const *base, guint flags);
103 static gint sp_style_write_ibaselineshift(gchar *p, gint len, gchar const *key, SPIBaselineShift const *val, SPIBaselineShift const *base, guint flags);
104 static gint sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key, SPILengthOrNormal const *const val, SPILengthOrNormal const *const base, guint const flags);
105 static gint sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key, SPITextDecoration const *const val, SPITextDecoration const *const base, guint const flags);
106 static gint sp_style_write_ifilter(gchar *b, gint len, gchar const *key, SPIFilter const *filter, SPIFilter const *base, guint flags);
108 static void sp_style_filter_clear(SPStyle *style);
110 #define SPS_READ_IENUM_IF_UNSET(v,s,d,i) if (!(v)->set) {sp_style_read_ienum((v), (s), (d), (i));}
111 #define SPS_READ_PENUM_IF_UNSET(v,r,k,d,i) if (!(v)->set) {sp_style_read_penum((v), (r), (k), (d), (i));}
113 #define SPS_READ_ILENGTH_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ilength((v), (s));}
114 #define SPS_READ_PLENGTH_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_plength((v), (r), (k));}
116 #define SPS_READ_PFLOAT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfloat((v), (r), (k));}
118 #define SPS_READ_IFONTSIZE_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ifontsize((v), (s));}
119 #define SPS_READ_PFONTSIZE_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfontsize((v), (r), (k));}
121 #define SPS_READ_IBASELINE_SHIFT_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ibaselineshift((v), (s));}
122 #define SPS_READ_PBASELINE_SHIFT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pbaselineshift((v), (r), (k));}
124 static void sp_style_merge_from_object_stylesheet(SPStyle *, SPObject const *);
126 struct SPStyleEnum {
127 gchar const *key;
128 gint value;
129 };
131 static SPStyleEnum const enum_fill_rule[] = {
132 {"nonzero", SP_WIND_RULE_NONZERO},
133 {"evenodd", SP_WIND_RULE_EVENODD},
134 {NULL, -1}
135 };
137 static SPStyleEnum const enum_stroke_linecap[] = {
138 {"butt", SP_STROKE_LINECAP_BUTT},
139 {"round", SP_STROKE_LINECAP_ROUND},
140 {"square", SP_STROKE_LINECAP_SQUARE},
141 {NULL, -1}
142 };
144 static SPStyleEnum const enum_stroke_linejoin[] = {
145 {"miter", SP_STROKE_LINEJOIN_MITER},
146 {"round", SP_STROKE_LINEJOIN_ROUND},
147 {"bevel", SP_STROKE_LINEJOIN_BEVEL},
148 {NULL, -1}
149 };
151 static SPStyleEnum const enum_font_style[] = {
152 {"normal", SP_CSS_FONT_STYLE_NORMAL},
153 {"italic", SP_CSS_FONT_STYLE_ITALIC},
154 {"oblique", SP_CSS_FONT_STYLE_OBLIQUE},
155 {NULL, -1}
156 };
158 static SPStyleEnum const enum_font_size[] = {
159 {"xx-small", SP_CSS_FONT_SIZE_XX_SMALL},
160 {"x-small", SP_CSS_FONT_SIZE_X_SMALL},
161 {"small", SP_CSS_FONT_SIZE_SMALL},
162 {"medium", SP_CSS_FONT_SIZE_MEDIUM},
163 {"large", SP_CSS_FONT_SIZE_LARGE},
164 {"x-large", SP_CSS_FONT_SIZE_X_LARGE},
165 {"xx-large", SP_CSS_FONT_SIZE_XX_LARGE},
166 {"smaller", SP_CSS_FONT_SIZE_SMALLER},
167 {"larger", SP_CSS_FONT_SIZE_LARGER},
168 {NULL, -1}
169 };
171 static SPStyleEnum const enum_font_variant[] = {
172 {"normal", SP_CSS_FONT_VARIANT_NORMAL},
173 {"small-caps", SP_CSS_FONT_VARIANT_SMALL_CAPS},
174 {NULL, -1}
175 };
177 static SPStyleEnum const enum_font_weight[] = {
178 {"100", SP_CSS_FONT_WEIGHT_100},
179 {"200", SP_CSS_FONT_WEIGHT_200},
180 {"300", SP_CSS_FONT_WEIGHT_300},
181 {"400", SP_CSS_FONT_WEIGHT_400},
182 {"500", SP_CSS_FONT_WEIGHT_500},
183 {"600", SP_CSS_FONT_WEIGHT_600},
184 {"700", SP_CSS_FONT_WEIGHT_700},
185 {"800", SP_CSS_FONT_WEIGHT_800},
186 {"900", SP_CSS_FONT_WEIGHT_900},
187 {"normal", SP_CSS_FONT_WEIGHT_NORMAL},
188 {"bold", SP_CSS_FONT_WEIGHT_BOLD},
189 {"lighter", SP_CSS_FONT_WEIGHT_LIGHTER},
190 {"bolder", SP_CSS_FONT_WEIGHT_BOLDER},
191 {NULL, -1}
192 };
194 static SPStyleEnum const enum_font_stretch[] = {
195 {"ultra-condensed", SP_CSS_FONT_STRETCH_ULTRA_CONDENSED},
196 {"extra-condensed", SP_CSS_FONT_STRETCH_EXTRA_CONDENSED},
197 {"condensed", SP_CSS_FONT_STRETCH_CONDENSED},
198 {"semi-condensed", SP_CSS_FONT_STRETCH_SEMI_CONDENSED},
199 {"normal", SP_CSS_FONT_STRETCH_NORMAL},
200 {"semi-expanded", SP_CSS_FONT_STRETCH_SEMI_EXPANDED},
201 {"expanded", SP_CSS_FONT_STRETCH_EXPANDED},
202 {"extra-expanded", SP_CSS_FONT_STRETCH_EXTRA_EXPANDED},
203 {"ultra-expanded", SP_CSS_FONT_STRETCH_ULTRA_EXPANDED},
204 {"narrower", SP_CSS_FONT_STRETCH_NARROWER},
205 {"wider", SP_CSS_FONT_STRETCH_WIDER},
206 {NULL, -1}
207 };
209 static SPStyleEnum const enum_text_align[] = {
210 {"start", SP_CSS_TEXT_ALIGN_START},
211 {"end", SP_CSS_TEXT_ALIGN_END},
212 {"left", SP_CSS_TEXT_ALIGN_LEFT},
213 {"right", SP_CSS_TEXT_ALIGN_RIGHT},
214 {"center", SP_CSS_TEXT_ALIGN_CENTER},
215 {"justify", SP_CSS_TEXT_ALIGN_JUSTIFY},
216 {NULL, -1}
217 };
219 static SPStyleEnum const enum_text_transform[] = {
220 {"capitalize", SP_CSS_TEXT_TRANSFORM_CAPITALIZE},
221 {"uppercase", SP_CSS_TEXT_TRANSFORM_UPPERCASE},
222 {"lowercase", SP_CSS_TEXT_TRANSFORM_LOWERCASE},
223 {"none", SP_CSS_TEXT_TRANSFORM_NONE},
224 {NULL, -1}
225 };
227 static SPStyleEnum const enum_text_anchor[] = {
228 {"start", SP_CSS_TEXT_ANCHOR_START},
229 {"middle", SP_CSS_TEXT_ANCHOR_MIDDLE},
230 {"end", SP_CSS_TEXT_ANCHOR_END},
231 {NULL, -1}
232 };
234 static SPStyleEnum const enum_direction[] = {
235 {"ltr", SP_CSS_DIRECTION_LTR},
236 {"rtl", SP_CSS_DIRECTION_RTL},
237 {NULL, -1}
238 };
240 static SPStyleEnum const enum_block_progression[] = {
241 {"tb", SP_CSS_BLOCK_PROGRESSION_TB},
242 {"rl", SP_CSS_BLOCK_PROGRESSION_RL},
243 {"lr", SP_CSS_BLOCK_PROGRESSION_LR},
244 {NULL, -1}
245 };
247 static SPStyleEnum const enum_writing_mode[] = {
248 /* Note that using the same enumerator for lr as lr-tb means we write as lr-tb even if the
249 * input file said lr. We prefer writing lr-tb on the grounds that the spec says the initial
250 * value is lr-tb rather than lr.
251 *
252 * ECMA scripts may be surprised to find tb-rl in DOM if they set the attribute to rl, so
253 * sharing enumerators for different strings may be a bug (once we support ecma script).
254 */
255 {"lr-tb", SP_CSS_WRITING_MODE_LR_TB},
256 {"rl-tb", SP_CSS_WRITING_MODE_RL_TB},
257 {"tb-rl", SP_CSS_WRITING_MODE_TB_RL},
258 {"lr", SP_CSS_WRITING_MODE_LR_TB},
259 {"rl", SP_CSS_WRITING_MODE_RL_TB},
260 {"tb", SP_CSS_WRITING_MODE_TB_RL},
261 {NULL, -1}
262 };
264 static SPStyleEnum const enum_baseline_shift[] = {
265 {"baseline", SP_CSS_BASELINE_SHIFT_BASELINE},
266 {"sub", SP_CSS_BASELINE_SHIFT_SUB},
267 {"super", SP_CSS_BASELINE_SHIFT_SUPER},
268 {NULL, -1}
269 };
271 static SPStyleEnum const enum_visibility[] = {
272 {"hidden", SP_CSS_VISIBILITY_HIDDEN},
273 {"collapse", SP_CSS_VISIBILITY_COLLAPSE},
274 {"visible", SP_CSS_VISIBILITY_VISIBLE},
275 {NULL, -1}
276 };
278 static SPStyleEnum const enum_overflow[] = {
279 {"visible", SP_CSS_OVERFLOW_VISIBLE},
280 {"hidden", SP_CSS_OVERFLOW_HIDDEN},
281 {"scroll", SP_CSS_OVERFLOW_SCROLL},
282 {"auto", SP_CSS_OVERFLOW_AUTO},
283 {NULL, -1}
284 };
286 static SPStyleEnum const enum_display[] = {
287 {"none", SP_CSS_DISPLAY_NONE},
288 {"inline", SP_CSS_DISPLAY_INLINE},
289 {"block", SP_CSS_DISPLAY_BLOCK},
290 {"list-item", SP_CSS_DISPLAY_LIST_ITEM},
291 {"run-in", SP_CSS_DISPLAY_RUN_IN},
292 {"compact", SP_CSS_DISPLAY_COMPACT},
293 {"marker", SP_CSS_DISPLAY_MARKER},
294 {"table", SP_CSS_DISPLAY_TABLE},
295 {"inline-table", SP_CSS_DISPLAY_INLINE_TABLE},
296 {"table-row-group", SP_CSS_DISPLAY_TABLE_ROW_GROUP},
297 {"table-header-group", SP_CSS_DISPLAY_TABLE_HEADER_GROUP},
298 {"table-footer-group", SP_CSS_DISPLAY_TABLE_FOOTER_GROUP},
299 {"table-row", SP_CSS_DISPLAY_TABLE_ROW},
300 {"table-column-group", SP_CSS_DISPLAY_TABLE_COLUMN_GROUP},
301 {"table-column", SP_CSS_DISPLAY_TABLE_COLUMN},
302 {"table-cell", SP_CSS_DISPLAY_TABLE_CELL},
303 {"table-caption", SP_CSS_DISPLAY_TABLE_CAPTION},
304 {NULL, -1}
305 };
307 static SPStyleEnum const enum_shape_rendering[] = {
308 {"auto", 0},
309 {"optimizeSpeed", 0},
310 {"crispEdges", 0},
311 {"geometricPrecision", 0},
312 {NULL, -1}
313 };
315 static SPStyleEnum const enum_color_rendering[] = {
316 {"auto", 0},
317 {"optimizeSpeed", 0},
318 {"optimizeQuality", 0},
319 {NULL, -1}
320 };
322 static SPStyleEnum const *const enum_image_rendering = enum_color_rendering;
324 static SPStyleEnum const enum_text_rendering[] = {
325 {"auto", 0},
326 {"optimizeSpeed", 0},
327 {"optimizeLegibility", 0},
328 {"geometricPrecision", 0},
329 {NULL, -1}
330 };
332 static SPStyleEnum const enum_enable_background[] = {
333 {"accumulate", SP_CSS_BACKGROUND_ACCUMULATE},
334 {"new", SP_CSS_BACKGROUND_NEW},
335 {NULL, -1}
336 };
338 /**
339 * Release callback.
340 */
341 static void
342 sp_style_object_release(SPObject *object, SPStyle *style)
343 {
344 (void)object; // TODO
345 style->object = NULL;
346 }
348 /**
349 * Emit style modified signal on style's object if the filter changed.
350 */
351 static void
352 sp_style_filter_ref_modified(SPObject *obj, guint flags, SPStyle *style)
353 {
354 (void)flags; // TODO
355 SPFilter *filter=static_cast<SPFilter *>(obj);
356 if (style->getFilter() == filter)
357 {
358 if (style->object) {
359 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
360 }
361 }
362 }
364 /**
365 * Gets called when the filter is (re)attached to the style
366 */
367 static void
368 sp_style_filter_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
369 {
370 if (old_ref) {
371 style->filter_modified_connection.disconnect();
372 }
373 if ( SP_IS_FILTER(ref))
374 {
375 style->filter_modified_connection =
376 ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_filter_ref_modified), style));
377 }
379 sp_style_filter_ref_modified(ref, 0, style);
380 }
382 /**
383 * Emit style modified signal on style's object if server is style's fill
384 * or stroke paint server.
385 */
386 static void
387 sp_style_paint_server_ref_modified(SPObject *obj, guint flags, SPStyle *style)
388 {
389 (void)flags; // TODO
390 SPPaintServer *server = static_cast<SPPaintServer *>(obj);
392 if ((style->fill.isPaintserver())
393 && style->getFillPaintServer() == server)
394 {
395 if (style->object) {
396 /** \todo
397 * fixme: I do not know, whether it is optimal - we are
398 * forcing reread of everything (Lauris)
399 */
400 /** \todo
401 * fixme: We have to use object_modified flag, because parent
402 * flag is only available downstreams.
403 */
404 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
405 }
406 } else if ((style->stroke.isPaintserver())
407 && style->getStrokePaintServer() == server)
408 {
409 if (style->object) {
410 /// \todo fixme:
411 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
412 }
413 } else if (server) {
414 g_assert_not_reached();
415 }
416 }
418 /**
419 * Gets called when the paintserver is (re)attached to the style
420 */
421 static void
422 sp_style_fill_paint_server_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
423 {
424 if (old_ref) {
425 style->fill_ps_modified_connection.disconnect();
426 }
427 if (SP_IS_PAINT_SERVER(ref)) {
428 style->fill_ps_modified_connection =
429 ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_paint_server_ref_modified), style));
430 }
432 sp_style_paint_server_ref_modified(ref, 0, style);
433 }
435 /**
436 * Gets called when the paintserver is (re)attached to the style
437 */
438 static void
439 sp_style_stroke_paint_server_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
440 {
441 if (old_ref) {
442 style->stroke_ps_modified_connection.disconnect();
443 }
444 if (SP_IS_PAINT_SERVER(ref)) {
445 style->stroke_ps_modified_connection =
446 ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_paint_server_ref_modified), style));
447 }
449 sp_style_paint_server_ref_modified(ref, 0, style);
450 }
452 /**
453 * Returns a new SPStyle object with settings as per sp_style_clear().
454 */
455 SPStyle *
456 sp_style_new(SPDocument *document)
457 {
458 SPStyle *const style = g_new0(SPStyle, 1);
460 style->refcount = 1;
461 style->object = NULL;
462 style->document = document;
463 style->text = sp_text_style_new();
464 style->text_private = TRUE;
466 sp_style_clear(style);
468 style->cloned = false;
470 new (&style->release_connection) sigc::connection();
471 new (&style->filter_modified_connection) sigc::connection();
472 new (&style->fill_ps_modified_connection) sigc::connection();
473 new (&style->stroke_ps_modified_connection) sigc::connection();
475 return style;
476 }
479 /**
480 * Creates a new SPStyle object, and attaches it to the specified SPObject.
481 */
482 SPStyle *
483 sp_style_new_from_object(SPObject *object)
484 {
485 g_return_val_if_fail(object != NULL, NULL);
486 g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
488 SPStyle *style = sp_style_new( object->document );
489 style->object = object;
490 style->release_connection = object->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_object_release), style));
492 if (object && object->cloned) {
493 style->cloned = true;
494 }
496 return style;
497 }
500 /**
501 * Increase refcount of style.
502 */
503 SPStyle *
504 sp_style_ref(SPStyle *style)
505 {
506 g_return_val_if_fail(style != NULL, NULL);
507 g_return_val_if_fail(style->refcount > 0, NULL);
509 style->refcount += 1;
511 return style;
512 }
515 /**
516 * Decrease refcount of style with possible destruction.
517 */
518 SPStyle *
519 sp_style_unref(SPStyle *style)
520 {
521 g_return_val_if_fail(style != NULL, NULL);
522 g_return_val_if_fail(style->refcount > 0, NULL);
524 style->refcount -= 1;
526 if (style->refcount < 1) {
527 style->release_connection.disconnect();
528 style->release_connection.~connection();
529 if (style->text) sp_text_style_unref(style->text);
531 if (style->fill.value.href) {
532 style->fill_ps_modified_connection.disconnect();
533 delete style->fill.value.href;
534 style->fill.value.href = NULL;
535 }
536 if (style->stroke.value.href) {
537 style->stroke_ps_modified_connection.disconnect();
538 delete style->stroke.value.href;
539 style->stroke.value.href = NULL;
540 }
541 if (style->filter.href) {
542 style->filter_modified_connection.disconnect();
543 delete style->filter.href;
544 style->filter.href = NULL;
545 }
547 style->filter_modified_connection.~connection();
548 style->fill_ps_modified_connection.~connection();
549 style->stroke_ps_modified_connection.~connection();
551 style->fill.clear();
552 style->stroke.clear();
553 sp_style_filter_clear(style);
555 g_free(style->stroke_dash.dash);
556 g_free(style);
557 }
559 return NULL;
560 }
562 /**
563 * Reads the various style parameters for an object from repr.
564 */
565 static void
566 sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
567 {
568 g_assert(style != NULL);
569 g_assert(repr != NULL);
570 g_assert(!object || (SP_OBJECT_REPR(object) == repr));
572 sp_style_clear(style);
574 if (object && object->cloned) {
575 style->cloned = true;
576 }
578 /* 1. Style attribute */
579 gchar const *val = repr->attribute("style");
580 if (val != NULL) {
581 sp_style_merge_from_style_string(style, val);
582 }
584 if (object) {
585 sp_style_merge_from_object_stylesheet(style, object);
586 } else {
587 /** \todo No stylesheet information. Find out under what circumstances
588 * this occurs, and handle accordingly. (If we really wanted to, we
589 * could probably get stylesheets by going through repr->doc.)
590 */
591 }
593 /* 2. Presentation attributes */
594 /* CSS2 */
595 SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true);
596 SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true);
597 SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true);
598 /* Font */
599 SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size");
600 SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true);
601 SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true);
602 SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true);
603 SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true);
604 /* Text (css2 chapter 16) */
605 SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent");
606 SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true);
607 if (!style->text_decoration.set) {
608 val = repr->attribute("text-decoration");
609 if (val) {
610 sp_style_read_itextdecoration(&style->text_decoration, val);
611 }
612 }
613 if (!style->line_height.set) {
614 val = repr->attribute("line-height");
615 if (val) {
616 sp_style_read_ilengthornormal(&style->line_height, val);
617 }
618 }
619 if (!style->letter_spacing.set) {
620 val = repr->attribute("letter-spacing");
621 if (val) {
622 sp_style_read_ilengthornormal(&style->letter_spacing, val);
623 }
624 }
625 if (!style->word_spacing.set) {
626 val = repr->attribute("word-spacing");
627 if (val) {
628 sp_style_read_ilengthornormal(&style->word_spacing, val);
629 }
630 }
631 SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true);
632 SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true);
633 SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true);
635 /* SVG */
636 SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode",
637 enum_writing_mode, true);
638 SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor",
639 enum_text_anchor, true);
640 SPS_READ_PBASELINE_SHIFT_IF_UNSET(&style->baseline_shift, repr, "baseline-shift");
642 /* opacity */
643 if (!style->opacity.set) {
644 val = repr->attribute("opacity");
645 if (val) {
646 sp_style_read_iscale24(&style->opacity, val);
647 }
648 }
649 /* color */
650 if (!style->color.set) {
651 val = repr->attribute("color");
652 if (val) {
653 sp_style_read_icolor(&style->color, val, style, ( object
654 ? SP_OBJECT_DOCUMENT(object)
655 : NULL ));
656 }
657 }
658 /* fill */
659 if (!style->fill.set) {
660 val = repr->attribute("fill");
661 if (val) {
662 style->fill.read( val, *style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL );
663 }
664 }
665 /* fill-opacity */
666 if (!style->fill_opacity.set) {
667 val = repr->attribute("fill-opacity");
668 if (val) {
669 sp_style_read_iscale24(&style->fill_opacity, val);
670 }
671 }
672 /* fill-rule */
673 SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true);
674 /* stroke */
675 if (!style->stroke.set) {
676 val = repr->attribute("stroke");
677 if (val) {
678 style->stroke.read( val, *style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL );
679 }
680 }
681 SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width");
682 SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true);
683 SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true);
684 SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit");
686 /* markers */
687 if (!style->marker[SP_MARKER_LOC].set) {
688 val = repr->attribute("marker");
689 if (val) {
690 sp_style_read_istring(&style->marker[SP_MARKER_LOC], val);
691 }
692 }
693 if (!style->marker[SP_MARKER_LOC_START].set) {
694 val = repr->attribute("marker-start");
695 if (val) {
696 sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val);
697 }
698 }
699 if (!style->marker[SP_MARKER_LOC_MID].set) {
700 val = repr->attribute("marker-mid");
701 if (val) {
702 sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val);
703 }
704 }
705 if (!style->marker[SP_MARKER_LOC_END].set) {
706 val = repr->attribute("marker-end");
707 if (val) {
708 sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val);
709 }
710 }
712 /* stroke-opacity */
713 if (!style->stroke_opacity.set) {
714 val = repr->attribute("stroke-opacity");
715 if (val) {
716 sp_style_read_iscale24(&style->stroke_opacity, val);
717 }
718 }
719 if (!style->stroke_dasharray_set) {
720 val = repr->attribute("stroke-dasharray");
721 if (val) {
722 sp_style_read_dash(style, val);
723 }
724 }
726 if (!style->stroke_dashoffset_set) {
727 val = repr->attribute("stroke-dashoffset");
728 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
729 style->stroke_dashoffset_set = TRUE;
730 } else if (val && !strcmp(val, "inherit")) {
731 style->stroke_dashoffset_set = TRUE;
732 style->stroke_dashoffset_inherit = TRUE;
733 } else {
734 style->stroke_dashoffset_set = FALSE;
735 }
736 }
738 /* -inkscape-font-specification */
739 if (!style->text_private || !style->text->font_specification.set) {
740 val = repr->attribute("-inkscape-font-specification");
741 if (val) {
742 if (!style->text_private) sp_style_privatize_text(style);
743 gchar *val_unquoted = attribute_unquote(val);
744 sp_style_read_istring(&style->text->font_specification, val_unquoted);
745 if (val_unquoted) g_free (val_unquoted);
746 }
747 }
749 /* font-family */
750 if (!style->text_private || !style->text->font_family.set) {
751 val = repr->attribute("font-family");
752 if (val) {
753 if (!style->text_private) sp_style_privatize_text(style);
754 gchar *val_unquoted = attribute_unquote(val);
755 sp_style_read_istring(&style->text->font_family, val_unquoted);
756 if (val_unquoted) g_free (val_unquoted);
757 }
758 }
760 /* filter effects */
761 if (!style->filter.set) {
762 val = repr->attribute("filter");
763 if (val) {
764 sp_style_read_ifilter(val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
765 }
766 }
767 SPS_READ_PENUM_IF_UNSET(&style->enable_background, repr,
768 "enable-background", enum_enable_background, true);
770 /* 3. Merge from parent */
771 if (object) {
772 if (object->parent) {
773 sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent));
774 }
775 } else {
776 if (sp_repr_parent(repr)) {
777 /// \todo fixme: This is not the prettiest thing (Lauris)
778 SPStyle *parent = sp_style_new(NULL);
779 sp_style_read(parent, NULL, sp_repr_parent(repr));
780 sp_style_merge_from_parent(style, parent);
781 sp_style_unref(parent);
782 }
783 }
784 }
787 /**
788 * Read style properties from object's repr.
789 *
790 * 1. Reset existing object style
791 * 2. Load current effective object style
792 * 3. Load i attributes from immediate parent (which has to be up-to-date)
793 */
794 void
795 sp_style_read_from_object(SPStyle *style, SPObject *object)
796 {
797 g_return_if_fail(style != NULL);
798 g_return_if_fail(object != NULL);
799 g_return_if_fail(SP_IS_OBJECT(object));
801 Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
802 g_return_if_fail(repr != NULL);
804 sp_style_read(style, object, repr);
805 }
808 /**
809 * Read style properties from preferences.
810 * @param style The style to write to
811 * @param path Preferences directory from which the style should be read
812 */
813 void
814 sp_style_read_from_prefs(SPStyle *style, Glib::ustring const &path)
815 {
816 g_return_if_fail(style != NULL);
817 g_return_if_fail(path != "");
819 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
821 // not optimal: we reconstruct the node based on the prefs, then pass it to
822 // sp_style_read for actual processing.
823 Inkscape::XML::SimpleDocument *tempdoc = new Inkscape::XML::SimpleDocument;
824 Inkscape::XML::Node *tempnode = tempdoc->createElement("temp");
826 std::vector<Inkscape::Preferences::Entry> attrs = prefs->getAllEntries(path);
827 for (std::vector<Inkscape::Preferences::Entry>::iterator i = attrs.begin(); i != attrs.end(); ++i) {
828 tempnode->setAttribute(i->getEntryName().data(), i->getString().data());
829 }
831 sp_style_read(style, NULL, tempnode);
833 Inkscape::GC::release(tempnode);
834 Inkscape::GC::release(tempdoc);
835 delete tempdoc;
836 }
840 /**
841 *
842 */
843 static void
844 sp_style_privatize_text(SPStyle *style)
845 {
846 SPTextStyle *text = style->text;
847 style->text = sp_text_style_duplicate_unset(style->text);
848 sp_text_style_unref(text);
849 style->text_private = TRUE;
850 }
853 /**
854 * Merge property into style.
855 *
856 * Should be called in order of highest to lowest precedence.
857 * E.g. for a single style string, call from the last declaration to the first,
858 * as CSS says that later declarations override earlier ones.
859 *
860 * \pre val != NULL.
861 */
862 static void
863 sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
864 {
865 g_return_if_fail(val != NULL);
867 switch (id) {
868 case SP_PROP_INKSCAPE_FONT_SPEC:
869 if (!style->text_private) sp_style_privatize_text(style);
870 if (!style->text->font_specification.set) {
871 gchar *val_unquoted = attribute_unquote(val);
872 sp_style_read_istring(&style->text->font_specification, val_unquoted);
873 if (val_unquoted) g_free (val_unquoted);
874 }
875 break;
876 /* CSS2 */
877 /* Font */
878 case SP_PROP_FONT_FAMILY:
879 if (!style->text_private) sp_style_privatize_text(style);
880 if (!style->text->font_family.set) {
881 gchar *val_unquoted = attribute_unquote(val);
882 sp_style_read_istring(&style->text->font_family, val_unquoted);
883 if (val_unquoted) g_free (val_unquoted);
884 }
885 break;
886 case SP_PROP_FONT_SIZE:
887 SPS_READ_IFONTSIZE_IF_UNSET(&style->font_size, val);
888 break;
889 case SP_PROP_FONT_SIZE_ADJUST:
890 if (strcmp(val, "none") != 0) {
891 g_warning("Unimplemented style property id SP_PROP_FONT_SIZE_ADJUST: value: %s", val);
892 }
893 break;
894 case SP_PROP_FONT_STYLE:
895 SPS_READ_IENUM_IF_UNSET(&style->font_style, val, enum_font_style, true);
896 break;
897 case SP_PROP_FONT_VARIANT:
898 SPS_READ_IENUM_IF_UNSET(&style->font_variant, val, enum_font_variant, true);
899 break;
900 case SP_PROP_FONT_WEIGHT:
901 SPS_READ_IENUM_IF_UNSET(&style->font_weight, val, enum_font_weight, true);
902 break;
903 case SP_PROP_FONT_STRETCH:
904 SPS_READ_IENUM_IF_UNSET(&style->font_stretch, val, enum_font_stretch, true);
905 break;
906 case SP_PROP_FONT:
907 if (!style->text_private) sp_style_privatize_text(style);
908 if (!style->text->font.set) {
909 g_free(style->text->font.value);
910 style->text->font.value = g_strdup(val);
911 style->text->font.set = TRUE;
912 style->text->font.inherit = (val && !strcmp(val, "inherit"));
913 }
914 break;
915 /* Text */
916 case SP_PROP_TEXT_INDENT:
917 SPS_READ_ILENGTH_IF_UNSET(&style->text_indent, val);
918 break;
919 case SP_PROP_TEXT_ALIGN:
920 SPS_READ_IENUM_IF_UNSET(&style->text_align, val, enum_text_align, true);
921 break;
922 case SP_PROP_TEXT_DECORATION:
923 if (!style->text_decoration.set) {
924 sp_style_read_itextdecoration(&style->text_decoration, val);
925 }
926 break;
927 case SP_PROP_LINE_HEIGHT:
928 if (!style->line_height.set) {
929 sp_style_read_ilengthornormal(&style->line_height, val);
930 }
931 break;
932 case SP_PROP_LETTER_SPACING:
933 if (!style->letter_spacing.set) {
934 sp_style_read_ilengthornormal(&style->letter_spacing, val);
935 }
936 break;
937 case SP_PROP_WORD_SPACING:
938 if (!style->word_spacing.set) {
939 sp_style_read_ilengthornormal(&style->word_spacing, val);
940 }
941 break;
942 case SP_PROP_TEXT_TRANSFORM:
943 SPS_READ_IENUM_IF_UNSET(&style->text_transform, val, enum_text_transform, true);
944 break;
945 /* Text (css3) */
946 case SP_PROP_DIRECTION:
947 SPS_READ_IENUM_IF_UNSET(&style->direction, val, enum_direction, true);
948 break;
949 case SP_PROP_BLOCK_PROGRESSION:
950 SPS_READ_IENUM_IF_UNSET(&style->block_progression, val, enum_block_progression, true);
951 break;
952 case SP_PROP_WRITING_MODE:
953 SPS_READ_IENUM_IF_UNSET(&style->writing_mode, val, enum_writing_mode, true);
954 break;
955 case SP_PROP_TEXT_ANCHOR:
956 SPS_READ_IENUM_IF_UNSET(&style->text_anchor, val, enum_text_anchor, true);
957 break;
958 case SP_PROP_BASELINE_SHIFT:
959 SPS_READ_IBASELINE_SHIFT_IF_UNSET(&style->baseline_shift, val);
960 break;
961 /* Text (unimplemented) */
962 case SP_PROP_TEXT_RENDERING: {
963 /* Ignore the hint. */
964 SPIEnum dummy;
965 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_text_rendering, true);
966 break;
967 }
968 case SP_PROP_ALIGNMENT_BASELINE:
969 g_warning("Unimplemented style property SP_PROP_ALIGNMENT_BASELINE: value: %s", val);
970 break;
971 case SP_PROP_DOMINANT_BASELINE:
972 g_warning("Unimplemented style property SP_PROP_DOMINANT_BASELINE: value: %s", val);
973 break;
974 case SP_PROP_GLYPH_ORIENTATION_HORIZONTAL:
975 g_warning("Unimplemented style property SP_PROP_ORIENTATION_HORIZONTAL: value: %s", val);
976 break;
977 case SP_PROP_GLYPH_ORIENTATION_VERTICAL:
978 g_warning("Unimplemented style property SP_PROP_ORIENTATION_VERTICAL: value: %s", val);
979 break;
980 case SP_PROP_KERNING:
981 g_warning("Unimplemented style property SP_PROP_KERNING: value: %s", val);
982 break;
983 /* Misc */
984 case SP_PROP_CLIP:
985 g_warning("Unimplemented style property SP_PROP_CLIP: value: %s", val);
986 break;
987 case SP_PROP_COLOR:
988 if (!style->color.set) {
989 sp_style_read_icolor(&style->color, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
990 }
991 break;
992 case SP_PROP_CURSOR:
993 g_warning("Unimplemented style property SP_PROP_CURSOR: value: %s", val);
994 break;
995 case SP_PROP_DISPLAY:
996 SPS_READ_IENUM_IF_UNSET(&style->display, val, enum_display, true);
997 break;
998 case SP_PROP_OVERFLOW:
999 /** \todo
1000 * FIXME: not supported properly yet, we just read and write it,
1001 * but act as if it is always "display".
1002 */
1003 SPS_READ_IENUM_IF_UNSET(&style->overflow, val, enum_overflow, true);
1004 break;
1005 case SP_PROP_VISIBILITY:
1006 SPS_READ_IENUM_IF_UNSET(&style->visibility, val, enum_visibility, true);
1007 break;
1008 /* SVG */
1009 /* Clip/Mask */
1010 case SP_PROP_CLIP_PATH:
1011 /** \todo
1012 * This is a workaround. Inkscape only supports 'clip-path' as SVG attribute, not as
1013 * style property. By having both CSS and SVG attribute set, editing of clip-path
1014 * will fail, since CSS always overwrites SVG attributes.
1015 * Fixes Bug #324849
1016 */
1017 g_warning("attribute 'clip-path' given as CSS");
1018 style->object->repr->setAttribute("clip-path", val);
1019 break;
1020 case SP_PROP_CLIP_RULE:
1021 g_warning("Unimplemented style property SP_PROP_CLIP_RULE: value: %s", val);
1022 break;
1023 case SP_PROP_MASK:
1024 /** \todo
1025 * See comment for SP_PROP_CLIP_PATH
1026 */
1027 g_warning("attribute 'mask' given as CSS");
1028 style->object->repr->setAttribute("mask", val);
1029 break;
1030 case SP_PROP_OPACITY:
1031 if (!style->opacity.set) {
1032 sp_style_read_iscale24(&style->opacity, val);
1033 }
1034 break;
1035 case SP_PROP_ENABLE_BACKGROUND:
1036 SPS_READ_IENUM_IF_UNSET(&style->enable_background, val,
1037 enum_enable_background, true);
1038 break;
1039 /* Filter */
1040 case SP_PROP_FILTER:
1041 if (!style->filter.set && !style->filter.inherit) {
1042 sp_style_read_ifilter(val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
1043 }
1044 break;
1045 case SP_PROP_FLOOD_COLOR:
1046 g_warning("Unimplemented style property SP_PROP_FLOOD_COLOR: value: %s", val);
1047 break;
1048 case SP_PROP_FLOOD_OPACITY:
1049 g_warning("Unimplemented style property SP_PROP_FLOOD_OPACITY: value: %s", val);
1050 break;
1051 case SP_PROP_LIGHTING_COLOR:
1052 g_warning("Unimplemented style property SP_PROP_LIGHTING_COLOR: value: %s", val);
1053 break;
1054 /* Gradient */
1055 case SP_PROP_STOP_COLOR:
1056 g_warning("Unimplemented style property SP_PROP_STOP_COLOR: value: %s", val);
1057 break;
1058 case SP_PROP_STOP_OPACITY:
1059 g_warning("Unimplemented style property SP_PROP_STOP_OPACITY: value: %s", val);
1060 break;
1061 /* Interactivity */
1062 case SP_PROP_POINTER_EVENTS:
1063 g_warning("Unimplemented style property SP_PROP_POINTER_EVENTS: value: %s", val);
1064 break;
1065 /* Paint */
1066 case SP_PROP_COLOR_INTERPOLATION:
1067 g_warning("Unimplemented style property SP_PROP_COLOR_INTERPOLATION: value: %s", val);
1068 break;
1069 case SP_PROP_COLOR_INTERPOLATION_FILTERS:
1070 g_warning("Unimplemented style property SP_PROP_INTERPOLATION_FILTERS: value: %s", val);
1071 break;
1072 case SP_PROP_COLOR_PROFILE:
1073 g_warning("Unimplemented style property SP_PROP_COLOR_PROFILE: value: %s", val);
1074 break;
1075 case SP_PROP_COLOR_RENDERING: {
1076 /* Ignore the hint. */
1077 SPIEnum dummy;
1078 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_color_rendering, true);
1079 break;
1080 }
1081 case SP_PROP_FILL:
1082 if (!style->fill.set) {
1083 style->fill.read( val, *style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL );
1084 }
1085 break;
1086 case SP_PROP_FILL_OPACITY:
1087 if (!style->fill_opacity.set) {
1088 sp_style_read_iscale24(&style->fill_opacity, val);
1089 }
1090 break;
1091 case SP_PROP_FILL_RULE:
1092 if (!style->fill_rule.set) {
1093 sp_style_read_ienum(&style->fill_rule, val, enum_fill_rule, true);
1094 }
1095 break;
1096 case SP_PROP_IMAGE_RENDERING: {
1097 /* Ignore the hint. */
1098 SPIEnum dummy;
1099 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_image_rendering, true);
1100 break;
1101 }
1102 case SP_PROP_MARKER:
1103 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1104 /* style->marker[SP_MARKER_LOC] = g_quark_from_string(val); */
1105 if (!style->marker[SP_MARKER_LOC].set) {
1106 g_free(style->marker[SP_MARKER_LOC].value);
1107 style->marker[SP_MARKER_LOC].value = g_strdup(val);
1108 style->marker[SP_MARKER_LOC].set = TRUE;
1109 style->marker[SP_MARKER_LOC].inherit = (val && !strcmp(val, "inherit"));
1110 }
1111 break;
1113 case SP_PROP_MARKER_START:
1114 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1115 if (!style->marker[SP_MARKER_LOC_START].set) {
1116 g_free(style->marker[SP_MARKER_LOC_START].value);
1117 style->marker[SP_MARKER_LOC_START].value = g_strdup(val);
1118 style->marker[SP_MARKER_LOC_START].set = TRUE;
1119 style->marker[SP_MARKER_LOC_START].inherit = (val && !strcmp(val, "inherit"));
1120 }
1121 break;
1122 case SP_PROP_MARKER_MID:
1123 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1124 if (!style->marker[SP_MARKER_LOC_MID].set) {
1125 g_free(style->marker[SP_MARKER_LOC_MID].value);
1126 style->marker[SP_MARKER_LOC_MID].value = g_strdup(val);
1127 style->marker[SP_MARKER_LOC_MID].set = TRUE;
1128 style->marker[SP_MARKER_LOC_MID].inherit = (val && !strcmp(val, "inherit"));
1129 }
1130 break;
1131 case SP_PROP_MARKER_END:
1132 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1133 if (!style->marker[SP_MARKER_LOC_END].set) {
1134 g_free(style->marker[SP_MARKER_LOC_END].value);
1135 style->marker[SP_MARKER_LOC_END].value = g_strdup(val);
1136 style->marker[SP_MARKER_LOC_END].set = TRUE;
1137 style->marker[SP_MARKER_LOC_END].inherit = (val && !strcmp(val, "inherit"));
1138 }
1139 break;
1141 case SP_PROP_SHAPE_RENDERING: {
1142 /* Ignore the hint. */
1143 SPIEnum dummy;
1144 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_shape_rendering, true);
1145 break;
1146 }
1148 case SP_PROP_STROKE:
1149 if (!style->stroke.set) {
1150 style->stroke.read( val, *style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL );
1151 }
1152 break;
1153 case SP_PROP_STROKE_WIDTH:
1154 SPS_READ_ILENGTH_IF_UNSET(&style->stroke_width, val);
1155 break;
1156 case SP_PROP_STROKE_DASHARRAY:
1157 if (!style->stroke_dasharray_set) {
1158 sp_style_read_dash(style, val);
1159 }
1160 break;
1161 case SP_PROP_STROKE_DASHOFFSET:
1162 if (!style->stroke_dashoffset_set) {
1163 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
1164 style->stroke_dashoffset_set = TRUE;
1165 } else if (val && !strcmp(val, "inherit")) {
1166 style->stroke_dashoffset_set = TRUE;
1167 style->stroke_dashoffset_inherit = TRUE;
1168 } else {
1169 style->stroke_dashoffset_set = FALSE;
1170 }
1171 }
1172 break;
1173 case SP_PROP_STROKE_LINECAP:
1174 if (!style->stroke_linecap.set) {
1175 sp_style_read_ienum(&style->stroke_linecap, val, enum_stroke_linecap, true);
1176 }
1177 break;
1178 case SP_PROP_STROKE_LINEJOIN:
1179 if (!style->stroke_linejoin.set) {
1180 sp_style_read_ienum(&style->stroke_linejoin, val, enum_stroke_linejoin, true);
1181 }
1182 break;
1183 case SP_PROP_STROKE_MITERLIMIT:
1184 if (!style->stroke_miterlimit.set) {
1185 sp_style_read_ifloat(&style->stroke_miterlimit, val);
1186 }
1187 break;
1188 case SP_PROP_STROKE_OPACITY:
1189 if (!style->stroke_opacity.set) {
1190 sp_style_read_iscale24(&style->stroke_opacity, val);
1191 }
1192 break;
1194 default:
1195 g_warning("Invalid style property id: %d value: %s", id, val);
1196 break;
1197 }
1198 }
1200 static void
1201 sp_style_merge_style_from_decl(SPStyle *const style, CRDeclaration const *const decl)
1202 {
1203 /** \todo Ensure that property is lcased, as per
1204 * http://www.w3.org/TR/REC-CSS2/syndata.html#q4.
1205 * Should probably be done in libcroco.
1206 */
1207 unsigned const prop_idx = sp_attribute_lookup(decl->property->stryng->str);
1208 if (prop_idx != SP_ATTR_INVALID) {
1209 /** \todo
1210 * effic: Test whether the property is already set before trying to
1211 * convert to string. Alternatively, set from CRTerm directly rather
1212 * than converting to string.
1213 */
1214 guchar *const str_value_unsigned = cr_term_to_string(decl->value);
1215 gchar *const str_value = reinterpret_cast<gchar *>(str_value_unsigned);
1216 sp_style_merge_property(style, prop_idx, str_value);
1217 g_free(str_value);
1218 }
1219 }
1221 static void
1222 sp_style_merge_from_props(SPStyle *const style, CRPropList *const props)
1223 {
1224 #if 0 /* forwards */
1225 for (CRPropList const *cur = props; cur; cur = cr_prop_list_get_next(cur)) {
1226 CRDeclaration *decl = NULL;
1227 cr_prop_list_get_decl(cur, &decl);
1228 sp_style_merge_style_from_decl(style, decl);
1229 }
1230 #else /* in reverse order, as we need later declarations to take precedence over earlier ones. */
1231 if (props) {
1232 sp_style_merge_from_props(style, cr_prop_list_get_next(props));
1233 CRDeclaration *decl = NULL;
1234 cr_prop_list_get_decl(props, &decl);
1235 sp_style_merge_style_from_decl(style, decl);
1236 }
1237 #endif
1238 }
1240 /**
1241 * \pre decl_list != NULL
1242 */
1243 static void
1244 sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list)
1245 {
1246 // read the decls from end to start, using head recursion, so that latter declarations override
1247 // (Ref: http://www.w3.org/TR/REC-CSS2/cascade.html#cascading-order point 4.)
1248 // because sp_style_merge_style_from_decl only sets properties that are unset
1249 if (decl_list->next) {
1250 sp_style_merge_from_decl_list(style, decl_list->next);
1251 }
1252 sp_style_merge_style_from_decl(style, decl_list);
1253 }
1255 static CRSelEng *
1256 sp_repr_sel_eng()
1257 {
1258 CRSelEng *const ret = cr_sel_eng_new();
1259 cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface);
1261 /** \todo
1262 * Check whether we need to register any pseudo-class handlers.
1263 * libcroco has its own default handlers for first-child and lang.
1264 *
1265 * We probably want handlers for link and arguably visited (though
1266 * inkscape can't visit links at the time of writing). hover etc.
1267 * more useful in inkview than the editor inkscape.
1268 *
1269 * http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that
1270 * the following should be honoured, at least by inkview:
1271 * :hover, :active, :focus, :visited, :link.
1272 */
1274 g_assert(ret);
1275 return ret;
1276 }
1278 static void
1279 sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object)
1280 {
1281 static CRSelEng *sel_eng = NULL;
1282 if (!sel_eng) {
1283 sel_eng = sp_repr_sel_eng();
1284 }
1286 CRPropList *props = NULL;
1287 CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng,
1288 object->document->style_cascade,
1289 object->repr,
1290 &props);
1291 g_return_if_fail(status == CR_OK);
1292 /// \todo Check what errors can occur, and handle them properly.
1293 if (props) {
1294 sp_style_merge_from_props(style, props);
1295 cr_prop_list_destroy(props);
1296 }
1297 }
1299 /**
1300 * Parses a style="..." string and merges it with an existing SPStyle.
1301 */
1302 void
1303 sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p)
1304 {
1305 /*
1306 * Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute:
1307 * ``When CSS styling is used, CSS inline style is specified by including
1308 * semicolon-separated property declarations of the form "name : value"
1309 * within the style attribute''.
1310 *
1311 * That's fairly ambiguous. Is a `value' allowed to contain semicolons?
1312 * Why does it say "including", what else is allowed in the style
1313 * attribute value?
1314 */
1316 CRDeclaration *const decl_list
1317 = cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8);
1318 if (decl_list) {
1319 sp_style_merge_from_decl_list(style, decl_list);
1320 cr_declaration_destroy(decl_list);
1321 }
1322 }
1324 /** Indexed by SP_CSS_FONT_SIZE_blah. */
1325 static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0};
1327 static void
1328 sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent)
1329 {
1330 /* 'font-size' */
1331 if (!child.set || child.inherit) {
1332 /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
1333 child.computed = parent.computed;
1334 } else if (child.type == SP_FONT_SIZE_LITERAL) {
1335 /** \todo
1336 * fixme: SVG and CSS do not specify clearly, whether we should use
1337 * user or screen coordinates (Lauris)
1338 */
1339 if (child.value < SP_CSS_FONT_SIZE_SMALLER) {
1340 child.computed = font_size_table[child.value];
1341 } else if (child.value == SP_CSS_FONT_SIZE_SMALLER) {
1342 child.computed = parent.computed / 1.2;
1343 } else if (child.value == SP_CSS_FONT_SIZE_LARGER) {
1344 child.computed = parent.computed * 1.2;
1345 } else {
1346 /* Illegal value */
1347 }
1348 } else if (child.type == SP_FONT_SIZE_PERCENTAGE) {
1349 /* Unlike most other lengths, percentage for font size is relative to parent computed value
1350 * rather than viewport. */
1351 child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value);
1352 }
1353 }
1355 // Some shifts are defined relative to parent.
1356 static void
1357 sp_style_merge_baseline_shift_from_parent(SPIBaselineShift &child, SPIBaselineShift const &parent,
1358 SPIFontSize const &pfont_size)
1359 {
1360 /* 'baseline-shift' */
1361 if (!child.set || child.inherit) {
1362 /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
1363 child.computed = parent.computed; // Does this make sense (applying a shift a second time)?
1364 } else if (child.type == SP_BASELINE_SHIFT_LITERAL) {
1365 if( child.literal == SP_CSS_BASELINE_SHIFT_BASELINE ) {
1366 child.computed = 0; // No change
1367 } else if (child.literal == SP_CSS_BASELINE_SHIFT_SUB ) {
1368 // Should use subscript position from font relative to alphabetic baseline
1369 // OpenOffice, Adobe: -0.33, Word -0.14, LaTex about -0.2.
1370 child.computed = -0.2 * pfont_size.computed;
1371 } else if (child.literal == SP_CSS_BASELINE_SHIFT_SUPER ) {
1372 // Should use superscript position from font relative to alphabetic baseline
1373 // OpenOffice, Adobe: 0.33, Word 0.35, LaTex about 0.45.
1374 child.computed = 0.4 * pfont_size.computed;
1375 } else {
1376 /* Illegal value */
1377 }
1378 } else if (child.type == SP_BASELINE_SHIFT_PERCENTAGE) {
1379 // Percentage for baseline shift is relative to computed "line-height"
1380 // which is just font-size (see SVG1.1 'font').
1381 child.computed = pfont_size.computed * child.value;
1382 } else if (child.type == SP_BASELINE_SHIFT_LENGTH) {
1383 switch (child.unit) {
1384 case SP_CSS_UNIT_EM:
1385 child.computed = child.value * pfont_size.computed;
1386 break;
1387 case SP_CSS_UNIT_EX:
1388 child.computed = child.value * 0.5 * pfont_size.computed;
1389 break;
1390 default:
1391 /* No change */
1392 break;
1393 }
1394 }
1395 // baseline-shifts are relative to parent baseline
1396 child.computed += parent.computed;
1397 }
1399 /**
1400 * Sets computed values in \a style, which may involve inheriting from (or in some other way
1401 * calculating from) corresponding computed values of \a parent.
1402 *
1403 * References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default.
1404 * http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to
1405 * inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise
1406 * about what the computed value is (not obvious for lengths).
1407 *
1408 * \pre \a parent's computed values are already up-to-date.
1409 */
1410 void
1411 sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent)
1412 {
1413 g_return_if_fail(style != NULL);
1415 /** \todo
1416 * fixme: Check for existing callers that might pass null parent.
1417 * This should probably be g_return_if_fail, or else we should make a
1418 * best attempt to set computed values correctly without having a parent
1419 * (i.e., by assuming parent has initial values).
1420 */
1421 if (!parent)
1422 return;
1424 /* CSS2 */
1425 /* Font */
1426 sp_style_merge_font_size_from_parent(style->font_size, parent->font_size);
1428 /* 'font-style' */
1429 if (!style->font_style.set || style->font_style.inherit) {
1430 style->font_style.computed = parent->font_style.computed;
1431 }
1433 /* 'font-variant' */
1434 if (!style->font_variant.set || style->font_variant.inherit) {
1435 style->font_variant.computed = parent->font_variant.computed;
1436 }
1438 /* 'font-weight' */
1439 if (!style->font_weight.set || style->font_weight.inherit) {
1440 style->font_weight.computed = parent->font_weight.computed;
1441 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) {
1442 /** \todo
1443 * fixme: This is unconditional, i.e., happens even if parent not
1444 * present.
1445 */
1446 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
1447 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) {
1448 style->font_weight.computed = SP_CSS_FONT_WEIGHT_700;
1449 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) {
1450 unsigned const parent_val = parent->font_weight.computed;
1451 g_assert(SP_CSS_FONT_WEIGHT_100 == 0);
1452 // strictly, 'bolder' and 'lighter' should go to the next weight
1453 // expressible in the current font family, but that's difficult to
1454 // find out, so jumping by 3 seems an appropriate approximation
1455 style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3
1456 ? (unsigned)SP_CSS_FONT_WEIGHT_100
1457 : parent_val - 3);
1458 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1459 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) {
1460 unsigned const parent_val = parent->font_weight.computed;
1461 g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900);
1462 style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3
1463 ? (unsigned)SP_CSS_FONT_WEIGHT_900
1464 : parent_val + 3);
1465 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1466 }
1468 /* 'font-stretch' */
1469 if (!style->font_stretch.set || style->font_stretch.inherit) {
1470 style->font_stretch.computed = parent->font_stretch.computed;
1471 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) {
1472 unsigned const parent_val = parent->font_stretch.computed;
1473 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED
1474 ? parent_val
1475 : parent_val - 1);
1476 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1477 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) {
1478 unsigned const parent_val = parent->font_stretch.computed;
1479 g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1480 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED
1481 ? parent_val
1482 : parent_val + 1);
1483 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1484 }
1486 /* text (css2) */
1487 if (!style->text_indent.set || style->text_indent.inherit) {
1488 style->text_indent.computed = parent->text_indent.computed;
1489 }
1491 if (!style->text_align.set || style->text_align.inherit) {
1492 style->text_align.computed = parent->text_align.computed;
1493 }
1495 if (!style->text_decoration.set || style->text_decoration.inherit) {
1496 style->text_decoration.underline = parent->text_decoration.underline;
1497 style->text_decoration.overline = parent->text_decoration.overline;
1498 style->text_decoration.line_through = parent->text_decoration.line_through;
1499 style->text_decoration.blink = parent->text_decoration.blink;
1500 }
1502 if (!style->line_height.set || style->line_height.inherit) {
1503 style->line_height.value = parent->line_height.value;
1504 style->line_height.computed = parent->line_height.computed;
1505 style->line_height.normal = parent->line_height.normal;
1506 }
1508 if (!style->letter_spacing.set || style->letter_spacing.inherit) {
1509 style->letter_spacing.value = parent->letter_spacing.value;
1510 style->letter_spacing.computed = parent->letter_spacing.computed;
1511 style->letter_spacing.normal = parent->letter_spacing.normal;
1512 }
1514 if (!style->word_spacing.set || style->word_spacing.inherit) {
1515 style->word_spacing.value = parent->word_spacing.value;
1516 style->word_spacing.computed = parent->word_spacing.computed;
1517 style->word_spacing.normal = parent->word_spacing.normal;
1518 }
1520 if (!style->text_transform.set || style->text_transform.inherit) {
1521 style->text_transform.computed = parent->text_transform.computed;
1522 }
1524 if (!style->direction.set || style->direction.inherit) {
1525 style->direction.computed = parent->direction.computed;
1526 }
1528 if (!style->block_progression.set || style->block_progression.inherit) {
1529 style->block_progression.computed = parent->block_progression.computed;
1530 }
1532 if (!style->writing_mode.set || style->writing_mode.inherit) {
1533 style->writing_mode.computed = parent->writing_mode.computed;
1534 }
1536 if (!style->text_anchor.set || style->text_anchor.inherit) {
1537 style->text_anchor.computed = parent->text_anchor.computed;
1538 }
1540 /* Baseline Shift... Some shifts are relative to parent. */
1541 sp_style_merge_baseline_shift_from_parent(style->baseline_shift, parent->baseline_shift,
1542 parent->font_size);
1544 if (style->opacity.inherit) {
1545 style->opacity.value = parent->opacity.value;
1546 }
1548 /* Color */
1549 if (!style->color.set || style->color.inherit) {
1550 sp_style_merge_ipaint(style, &style->color, &parent->color);
1551 }
1553 /* Fill */
1554 if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) {
1555 sp_style_merge_ipaint(style, &style->fill, &parent->fill);
1556 }
1558 if (!style->fill_opacity.set || style->fill_opacity.inherit) {
1559 style->fill_opacity.value = parent->fill_opacity.value;
1560 }
1562 if (!style->fill_rule.set || style->fill_rule.inherit) {
1563 style->fill_rule.computed = parent->fill_rule.computed;
1564 }
1566 /* Stroke */
1567 if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) {
1568 sp_style_merge_ipaint(style, &style->stroke, &parent->stroke);
1569 }
1571 if (!style->stroke_width.set || style->stroke_width.inherit) {
1572 style->stroke_width.computed = parent->stroke_width.computed;
1573 } else {
1574 /* Update computed value for any change in font inherited from parent. */
1575 double const em = style->font_size.computed;
1576 if (style->stroke_width.unit == SP_CSS_UNIT_EM) {
1577 style->stroke_width.computed = style->stroke_width.value * em;
1578 } else if (style->stroke_width.unit == SP_CSS_UNIT_EX) {
1579 double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango.
1580 style->stroke_width.computed = style->stroke_width.value * ex;
1581 }
1582 }
1584 if (!style->stroke_linecap.set || style->stroke_linecap.inherit) {
1585 style->stroke_linecap.computed = parent->stroke_linecap.computed;
1586 }
1588 if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) {
1589 style->stroke_linejoin.computed = parent->stroke_linejoin.computed;
1590 }
1592 if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) {
1593 style->stroke_miterlimit.value = parent->stroke_miterlimit.value;
1594 }
1596 if (!style->stroke_dasharray_set || style->stroke_dasharray_inherit) {
1597 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1598 if (style->stroke_dash.n_dash > 0) {
1599 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1600 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1601 }
1602 }
1604 if (!style->stroke_dashoffset_set || style->stroke_dashoffset_inherit) {
1605 style->stroke_dash.offset = parent->stroke_dash.offset;
1606 }
1608 if (!style->stroke_opacity.set || style->stroke_opacity.inherit) {
1609 style->stroke_opacity.value = parent->stroke_opacity.value;
1610 }
1612 if (style->text && parent->text) {
1613 if (!style->text->font_family.set || style->text->font_family.inherit) {
1614 g_free(style->text->font_family.value);
1615 style->text->font_family.value = g_strdup(parent->text->font_family.value);
1616 }
1617 }
1619 if (style->text && parent->text) {
1620 if (!style->text->font_specification.set || style->text->font_specification.inherit) {
1621 g_free(style->text->font_specification.value);
1622 style->text->font_specification.value = g_strdup(parent->text->font_specification.value);
1623 }
1624 }
1626 /* Markers - Free the old value and make copy of the new */
1627 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1628 if (!style->marker[i].set || style->marker[i].inherit) {
1629 g_free(style->marker[i].value);
1630 style->marker[i].value = g_strdup(parent->marker[i].value);
1631 }
1632 }
1634 /* Filter effects */
1635 if (style->filter.inherit) {
1636 sp_style_merge_ifilter(style, &parent->filter);
1637 }
1639 if(style->enable_background.inherit) {
1640 style->enable_background.value = parent->enable_background.value;
1641 }
1642 }
1644 template <typename T>
1645 static void
1646 sp_style_merge_prop_from_dying_parent(T &child, T const &parent)
1647 {
1648 if ( ( !(child.set) || child.inherit )
1649 && parent.set && !(parent.inherit) )
1650 {
1651 child = parent;
1652 }
1653 }
1655 /**
1656 * Copy SPIString from parent to child.
1657 */
1658 static void
1659 sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent)
1660 {
1661 if ( ( !(child.set) || child.inherit )
1662 && parent.set && !(parent.inherit) )
1663 {
1664 g_free(child.value);
1665 child.value = g_strdup(parent.value);
1666 child.set = parent.set;
1667 child.inherit = parent.inherit;
1668 }
1669 }
1671 static void
1672 sp_style_merge_paint_prop_from_dying_parent(SPStyle *style,
1673 SPIPaint &child, SPIPaint const &parent)
1674 {
1675 /** \todo
1676 * I haven't given this much attention. See comments below about
1677 * currentColor, colorProfile, and relative URIs.
1678 */
1679 if (!child.set || child.inherit) {
1680 sp_style_merge_ipaint(style, &child, &parent);
1681 child.set = parent.set;
1682 child.inherit = parent.inherit;
1683 }
1684 }
1686 static void
1687 sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent,
1688 unsigned const max_computed_val,
1689 unsigned const smaller_val)
1690 {
1691 /* We assume that min computed val is 0, contiguous up to max_computed_val,
1692 then zero or more other absolute values, then smaller_val then larger_val. */
1693 unsigned const min_computed_val = 0;
1694 unsigned const larger_val = smaller_val + 1;
1695 g_return_if_fail(min_computed_val < max_computed_val);
1696 g_return_if_fail(max_computed_val < smaller_val);
1698 if (parent.set && !parent.inherit) {
1699 if (!child.set || child.inherit) {
1700 child.value = parent.value;
1701 child.set = parent.set; // i.e. true
1702 child.inherit = parent.inherit; // i.e. false
1703 } else if (child.value < smaller_val) {
1704 /* Child has absolute value: leave as is. */
1705 } else if ( ( child.value == smaller_val
1706 && parent.value == larger_val )
1707 || ( parent.value == smaller_val
1708 && child.value == larger_val ) )
1709 {
1710 child.set = false;
1711 /*
1712 * Note that this can result in a change in computed value in the
1713 * rare case that the parent's setting was a no-op (i.e. if the
1714 * parent's parent's computed value was already ultra-condensed or
1715 * ultra-expanded). However, I'd guess that the change is for the
1716 * better: I'd guess that if the properties were specified
1717 * relatively, then the intent is to counteract parent's effect.
1718 * I.e. I believe this is the best code even in that case.
1719 */
1720 } else if (child.value == parent.value) {
1721 /* Leave as is. */
1722 /** \todo
1723 * It's unclear what to do if style and parent specify the same
1724 * relative directive (narrower or wider). We can either convert
1725 * to absolute specification or coalesce to a single relative
1726 * request (of half the strength of the original pair).
1727 *
1728 * Converting to a single level of relative specification is a
1729 * better choice if the newly-unlinked clone is itself cloned to
1730 * other contexts (inheriting different font stretchiness): it
1731 * would preserve the effect that it will be narrower than
1732 * the inherited context in each case. The disadvantage is that
1733 * it will ~certainly affect the computed value of the
1734 * newly-unlinked clone.
1735 */
1736 } else {
1737 unsigned const parent_val = parent.computed;
1738 child.value = ( child.value == smaller_val
1739 ? ( parent_val == min_computed_val
1740 ? parent_val
1741 : parent_val - 1 )
1742 : ( parent_val == max_computed_val
1743 ? parent_val
1744 : parent_val + 1 ) );
1745 g_assert(child.value <= max_computed_val);
1746 child.inherit = false;
1747 g_assert(child.set);
1748 }
1749 }
1750 }
1752 template <typename LengthT>
1753 static void
1754 sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent,
1755 double const parent_child_em_ratio)
1756 {
1757 if ( ( !(child.set) || child.inherit )
1758 && parent.set && !(parent.inherit) )
1759 {
1760 child = parent;
1761 switch (parent.unit) {
1762 case SP_CSS_UNIT_EM:
1763 case SP_CSS_UNIT_EX:
1764 child.value *= parent_child_em_ratio;
1765 /** \todo
1766 * fixme: Have separate ex ratio parameter.
1767 * Get x height from libnrtype or pango.
1768 */
1769 if (!IS_FINITE(child.value)) {
1770 child.value = child.computed;
1771 child.unit = SP_CSS_UNIT_NONE;
1772 }
1773 break;
1775 default:
1776 break;
1777 }
1778 }
1779 }
1781 static double
1782 get_relative_font_size_frac(SPIFontSize const &font_size)
1783 {
1784 switch (font_size.type) {
1785 case SP_FONT_SIZE_LITERAL: {
1786 switch (font_size.value) {
1787 case SP_CSS_FONT_SIZE_SMALLER:
1788 return 5.0 / 6.0;
1790 case SP_CSS_FONT_SIZE_LARGER:
1791 return 6.0 / 5.0;
1793 default:
1794 g_assert_not_reached();
1795 }
1796 }
1798 case SP_FONT_SIZE_PERCENTAGE:
1799 return SP_F8_16_TO_FLOAT(font_size.value);
1801 case SP_FONT_SIZE_LENGTH:
1802 g_assert_not_reached();
1803 }
1804 g_assert_not_reached();
1805 }
1807 /**
1808 * Combine \a style and \a parent style specifications into a single style specification that
1809 * preserves (as much as possible) the effect of the existing \a style being a child of \a parent.
1810 *
1811 * Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being
1812 * unlinked), in which case we copy/adapt property values that are explicitly set in \a parent,
1813 * trying to retain the same visual appearance once the parent is removed. Interesting cases are
1814 * when there is unusual interaction with the parent's value (opacity, display) or when the value
1815 * can be specified as relative to the parent computed value (font-size, font-weight etc.).
1816 *
1817 * Doesn't update computed values of \a style. For correctness, you should subsequently call
1818 * sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a
1819 * style was previously up-to-date wrt \a parent.
1820 *
1821 * \pre \a parent's computed values are already up-to-date.
1822 * (\a style's computed values needn't be up-to-date.)
1823 */
1824 void
1825 sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent)
1826 {
1827 /** \note
1828 * The general rule for each property is as follows:
1829 *
1830 * If style is set to an absolute value, then leave it as is.
1831 *
1832 * Otherwise (i.e. if style has a relative value):
1833 *
1834 * If parent is set to an absolute value, then set style to the computed value.
1835 *
1836 * Otherwise, calculate the combined relative value (e.g. multiplying the two percentages).
1837 */
1839 /* We do font-size first, to ensure that em size is up-to-date. */
1840 /** \todo
1841 * fixme: We'll need to have more font-related things up the top once
1842 * we're getting x-height from pango or libnrtype.
1843 */
1845 /* Some things that allow relative specifications. */
1846 {
1847 /* font-size. Note that we update the computed font-size of style,
1848 to assist in em calculations later in this function. */
1849 if (parent->font_size.set && !parent->font_size.inherit) {
1850 if (!style->font_size.set || style->font_size.inherit) {
1851 /* font_size inherits the computed value, so we can use the parent value
1852 * verbatim. */
1853 style->font_size = parent->font_size;
1854 } else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) {
1855 /* Child already has absolute size (stored in computed value), so do nothing. */
1856 } else if ( style->font_size.type == SP_FONT_SIZE_LITERAL
1857 && style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) {
1858 /* Child already has absolute size, but we ensure that the computed value
1859 is up-to-date. */
1860 unsigned const ix = style->font_size.value;
1861 g_assert(ix < G_N_ELEMENTS(font_size_table));
1862 style->font_size.computed = font_size_table[ix];
1863 } else {
1864 /* Child has relative size. */
1865 double const child_frac(get_relative_font_size_frac(style->font_size));
1866 style->font_size.set = true;
1867 style->font_size.inherit = false;
1868 style->font_size.computed = parent->font_size.computed * child_frac;
1870 if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL
1871 && parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER )
1872 || parent->font_size.type == SP_FONT_SIZE_LENGTH )
1873 {
1874 /* Absolute value. */
1875 style->font_size.type = SP_FONT_SIZE_LENGTH;
1876 /* .value is unused for SP_FONT_SIZE_LENGTH. */
1877 } else {
1878 /* Relative value. */
1879 double const parent_frac(get_relative_font_size_frac(parent->font_size));
1880 style->font_size.type = SP_FONT_SIZE_PERCENTAGE;
1881 style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac);
1882 }
1883 }
1884 }
1886 /* 'font-stretch' */
1887 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch,
1888 parent->font_stretch,
1889 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
1890 SP_CSS_FONT_STRETCH_NARROWER);
1892 /* font-weight */
1893 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight,
1894 parent->font_weight,
1895 SP_CSS_FONT_WEIGHT_900,
1896 SP_CSS_FONT_WEIGHT_LIGHTER);
1897 }
1900 /* Enum values that don't have any relative settings (other than `inherit'). */
1901 {
1902 SPIEnum SPStyle::*const fields[] = {
1903 //nyi: SPStyle::clip_rule,
1904 //nyi: SPStyle::color_interpolation,
1905 //nyi: SPStyle::color_interpolation_filters,
1906 //nyi: SPStyle::color_rendering,
1907 &SPStyle::direction,
1908 &SPStyle::fill_rule,
1909 &SPStyle::font_style,
1910 &SPStyle::font_variant,
1911 //nyi: SPStyle::image_rendering,
1912 //nyi: SPStyle::pointer_events,
1913 //nyi: SPStyle::shape_rendering,
1914 &SPStyle::stroke_linecap,
1915 &SPStyle::stroke_linejoin,
1916 &SPStyle::text_anchor,
1917 //nyi: &SPStyle::text_rendering,
1918 &SPStyle::visibility,
1919 &SPStyle::writing_mode
1920 };
1922 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1923 SPIEnum SPStyle::*const fld = fields[i];
1924 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld);
1925 }
1926 }
1928 /* A few other simple inheritance properties. */
1929 {
1930 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity);
1931 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity);
1932 sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit);
1934 /** \todo
1935 * We currently treat text-decoration as if it were a simple inherited
1936 * property (fixme). This code may need changing once we do the
1937 * special fill/stroke inheritance mentioned by the spec.
1938 */
1939 sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration,
1940 parent->text_decoration);
1942 //nyi: font-size-adjust, // <number> | none | inherit
1943 //nyi: glyph-orientation-horizontal,
1944 //nyi: glyph-orientation-vertical,
1945 }
1947 /* Properties that involve length but are easy in other respects. */
1948 {
1949 /* The difficulty with lengths is that font-relative units need adjusting if the font
1950 * varies between parent & child.
1951 *
1952 * Lengths specified in the existing child can stay as they are: its computed font
1953 * specification should stay unchanged, so em & ex lengths should continue to mean the same
1954 * size.
1955 *
1956 * Lengths specified in the dying parent in em or ex need to be scaled according to the
1957 * ratio of em or ex size between parent & child.
1958 */
1959 double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed;
1961 SPILength SPStyle::*const lfields[] = {
1962 &SPStyle::stroke_width,
1963 &SPStyle::text_indent
1964 };
1965 for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) {
1966 SPILength SPStyle::*fld = lfields[i];
1967 sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld,
1968 parent->*fld,
1969 parent_child_em_ratio);
1970 }
1972 SPILengthOrNormal SPStyle::*const nfields[] = {
1973 &SPStyle::letter_spacing,
1974 &SPStyle::line_height,
1975 &SPStyle::word_spacing
1976 };
1977 for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) {
1978 SPILengthOrNormal SPStyle::*fld = nfields[i];
1979 sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld,
1980 parent->*fld,
1981 parent_child_em_ratio);
1982 }
1984 //nyi: &SPStyle::kerning: length or `auto'
1986 /* fixme: Move stroke-dash and stroke-dash-offset here once they
1987 can accept units. */
1988 }
1990 /* Properties that involve a URI but are easy in other respects. */
1991 {
1992 /** \todo
1993 * Could cause problems if original object was in another document
1994 * and it used a relative URL. (At the time of writing, we don't
1995 * allow hrefs to other documents, so this isn't a problem yet.)
1996 * Paint properties also allow URIs.
1997 */
1998 //nyi: cursor, // may involve change in effect, but we can't do much better
1999 //nyi: color-profile,
2001 // Markers (marker-start, marker-mid, marker-end).
2002 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
2003 sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]);
2004 }
2005 }
2007 /* CSS2 */
2008 /* Font */
2010 if (style->text && parent->text) {
2011 sp_style_merge_string_prop_from_dying_parent(style->text->font_specification,
2012 parent->text->font_specification);
2014 sp_style_merge_string_prop_from_dying_parent(style->text->font_family,
2015 parent->text->font_family);
2016 }
2019 /* Properties that don't inherit by default. Most of these need special handling. */
2020 {
2021 /*
2022 * opacity's effect is cumulative; we set the new value to the combined effect. The
2023 * default value for opacity is 1.0, not inherit. (Note that stroke-opacity and
2024 * fill-opacity are quite different from opacity, and don't need any special handling.)
2025 *
2026 * Cases:
2027 * - parent & child were each previously unset, in which case the effective
2028 * opacity value is 1.0, and style should remain unset.
2029 * - parent was previously unset (so computed opacity value of 1.0)
2030 * and child was set to inherit. The merged child should
2031 * get a value of 1.0, and shouldn't inherit (lest the new parent
2032 * has a different opacity value). Given that opacity's default
2033 * value is 1.0 (rather than inherit), we might as well have the
2034 * merged child's opacity be unset.
2035 * - parent was previously unset (so opacity 1.0), and child was set to a number.
2036 * The merged child should retain its existing settings (though it doesn't matter
2037 * if we make it unset if that number was 1.0).
2038 * - parent was inherit and child was unset. Merged child should be set to inherit.
2039 * - parent was inherit and child was inherit. (We can't in general reproduce this
2040 * effect (short of introducing a new group), but setting opacity to inherit is rare.)
2041 * If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged
2042 * child's value should be set to the product of the two, i.e. the square of the
2043 * inherited value, and should not be marked as inherit. (This decision assumes that it
2044 * is more important to retain the effective opacity than to retain the inheriting
2045 * effect, and assumes that the inheriting effect either isn't important enough to create
2046 * a group or isn't common enough to bother maintaining the code to create a group.) If
2047 * the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes
2048 * closer to maintaining the effect.
2049 * - parent was inherit and child was set to a numerical value. If the child's value
2050 * was 1.0, then the merged child should have the same settings as the parent.
2051 * If the child's value was 0, then the merged child should also be set to 0.
2052 * If the child's value was anything else, then we do the same as for the inherit/inherit
2053 * case above: have the merged child set to the product of the two opacities and not
2054 * marked as inherit, for the same reasons as for that case.
2055 * - parent was set to a value, and child was unset. The merged child should have
2056 * parent's settings.
2057 * - parent was set to a value, and child was inherit. The merged child should
2058 * be set to the product, i.e. the square of the parent's value.
2059 * - parent & child are each set to a value. The merged child should be set to the
2060 * product.
2061 */
2062 if ( !style->opacity.set
2063 || ( !style->opacity.inherit
2064 && style->opacity.value == SP_SCALE24_MAX ) )
2065 {
2066 style->opacity = parent->opacity;
2067 } else {
2068 /* Ensure that style's computed value is up-to-date. */
2069 if (style->opacity.inherit) {
2070 style->opacity.value = parent->opacity.value;
2071 }
2073 /* Multiplication of opacities occurs even if a child's opacity is set to inherit. */
2074 style->opacity.value = SP_SCALE24_MUL(style->opacity.value,
2075 parent->opacity.value);
2077 style->opacity.inherit = (parent->opacity.inherit
2078 && style->opacity.inherit
2079 && (parent->opacity.value == 0 ||
2080 parent->opacity.value == SP_SCALE24_MAX));
2081 style->opacity.set = ( style->opacity.inherit
2082 || style->opacity.value < SP_SCALE24_MAX );
2083 }
2085 /* display is in principle similar to opacity, but implementation is easier. */
2086 if ( parent->display.set && !parent->display.inherit
2087 && parent->display.value == SP_CSS_DISPLAY_NONE ) {
2088 style->display.value = SP_CSS_DISPLAY_NONE;
2089 style->display.set = true;
2090 style->display.inherit = false;
2091 } else if (style->display.inherit) {
2092 style->display.value = parent->display.value;
2093 style->display.set = parent->display.set;
2094 style->display.inherit = parent->display.inherit;
2095 } else {
2096 /* Leave as is. (display doesn't inherit by default.) */
2097 }
2099 /* enable-background - this is rather complicated, because
2100 * it is valid only when applied to container elements.
2101 * Let's check a simple case anyhow. */
2102 if (parent->enable_background.set
2103 && !parent->enable_background.inherit
2104 && style->enable_background.inherit)
2105 {
2106 style->enable_background.set = true;
2107 style->enable_background.inherit = false;
2108 style->enable_background.value = parent->enable_background.value;
2109 }
2111 if (!style->filter.set || style->filter.inherit)
2112 {
2113 sp_style_merge_ifilter(style, &parent->filter);
2114 }
2116 /** \todo
2117 * fixme: Check that we correctly handle all properties that don't
2118 * inherit by default (as shown in
2119 * http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties).
2120 */
2121 }
2123 /* SPIPaint properties (including color). */
2124 {
2125 /** \todo
2126 * Think about the issues involved if specified as currentColor or
2127 * if specified relative to colorProfile, and if the currentColor or
2128 * colorProfile differs between parent \& child. See also comments
2129 * elsewhere in this function about URIs.
2130 */
2131 SPIPaint SPStyle::*const fields[] = {
2132 &SPStyle::color,
2133 &SPStyle::fill,
2134 &SPStyle::stroke
2135 };
2136 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
2137 SPIPaint SPStyle::*const fld = fields[i];
2138 sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld);
2139 }
2140 }
2142 /* Things from SVG 1.2 or CSS3. */
2143 {
2144 /* Note: If we ever support setting string values for text-align then we'd need strdup
2145 * handling here. */
2146 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align);
2148 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform);
2149 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression);
2150 }
2152 /* Note: this will need length handling once dasharray supports units. */
2153 if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit )
2154 && parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit )
2155 {
2156 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
2157 if (style->stroke_dash.n_dash > 0) {
2158 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
2159 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
2160 }
2161 style->stroke_dasharray_set = parent->stroke_dasharray_set;
2162 style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit;
2163 }
2165 /* Note: this will need length handling once dasharray_offset supports units. */
2166 if ((!style->stroke_dashoffset_set || style->stroke_dashoffset_inherit) && parent->stroke_dashoffset_set && !parent->stroke_dashoffset_inherit) {
2167 style->stroke_dash.offset = parent->stroke_dash.offset;
2168 style->stroke_dashoffset_set = parent->stroke_dashoffset_set;
2169 style->stroke_dashoffset_inherit = parent->stroke_dashoffset_inherit;
2170 /* TODO: Try to
2171 * represent it as a normal SPILength; though will need to do something about existing
2172 * users of stroke_dash.offset and stroke_dashoffset_set. */
2173 }
2174 }
2177 static void
2178 sp_style_set_ipaint_to_uri(SPStyle *style, SPIPaint *paint, const Inkscape::URI *uri, SPDocument *document)
2179 {
2180 // it may be that this style's SPIPaint has not yet created its URIReference;
2181 // now that we have a document, we can create it here
2182 if (!paint->value.href && document) {
2183 paint->value.href = new SPPaintServerReference(document);
2184 paint->value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun((paint == &style->fill)? sp_style_fill_paint_server_ref_changed : sp_style_stroke_paint_server_ref_changed), style));
2185 }
2187 if (paint->value.href && paint->value.href->getObject())
2188 paint->value.href->detach();
2190 if (paint->value.href) {
2191 try {
2192 paint->value.href->attach(*uri);
2193 } catch (Inkscape::BadURIException &e) {
2194 g_warning("%s", e.what());
2195 paint->value.href->detach();
2196 }
2197 }
2198 }
2200 static void
2201 sp_style_set_ipaint_to_uri_string (SPStyle *style, SPIPaint *paint, const gchar *uri)
2202 {
2203 try {
2204 const Inkscape::URI IURI(uri);
2205 sp_style_set_ipaint_to_uri(style, paint, &IURI, style->document);
2206 } catch (...) {
2207 g_warning("URI failed to parse: %s", uri);
2208 }
2209 }
2211 void
2212 sp_style_set_to_uri_string (SPStyle *style, bool isfill, const gchar *uri)
2213 {
2214 sp_style_set_ipaint_to_uri_string (style, isfill? &style->fill : &style->stroke, uri);
2215 }
2217 /**
2218 *
2219 */
2220 static void
2221 sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
2222 {
2223 if ((paint->set && paint->currentcolor) || parent->currentcolor) {
2224 bool isset = paint->set;
2225 paint->clear();
2226 paint->set = isset;
2227 paint->currentcolor = TRUE;
2228 paint->setColor(style->color.value.color);
2229 return;
2230 }
2232 paint->clear();
2233 if ( parent->isPaintserver() ) {
2234 if (parent->value.href) {
2235 sp_style_set_ipaint_to_uri(style, paint, parent->value.href->getURI(), parent->value.href->getOwnerDocument());
2236 } else {
2237 g_warning("Expected paint server not found.");
2238 }
2239 } else if ( parent->isColor() ) {
2240 paint->setColor( parent->value.color );
2241 } else if ( parent->isNoneSet() ) {
2242 paint->noneSet = TRUE;
2243 } else if ( parent->isNone() ) {
2244 //
2245 } else {
2246 g_assert_not_reached();
2247 }
2248 }
2251 /**
2252 * Merge filter style from parent.
2253 * Filter effects do not inherit by default
2254 */
2255 static void
2256 sp_style_merge_ifilter(SPStyle *style, SPIFilter const *parent)
2257 {
2258 // FIXME:
2259 // instead of just copying over, we need to _really merge_ the two filters by combining their
2260 // filter primitives
2262 sp_style_filter_clear(style);
2263 style->filter.set = parent->set;
2264 style->filter.inherit = parent->inherit;
2266 if (style->filter.href && style->filter.href->getObject())
2267 style->filter.href->detach();
2269 // it may be that this style has not yet created its SPFilterReference
2270 if (!style->filter.href && style->object && SP_OBJECT_DOCUMENT(style->object)) {
2271 style->filter.href = new SPFilterReference(SP_OBJECT_DOCUMENT(style->object));
2272 style->filter.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_filter_ref_changed), style));
2273 }
2275 if (style->filter.href && parent->href && parent->href->getObject()) {
2276 try {
2277 style->filter.href->attach(*parent->href->getURI());
2278 } catch (Inkscape::BadURIException &e) {
2279 g_warning("%s", e.what());
2280 style->filter.href->detach();
2281 }
2282 }
2283 }
2285 /**
2286 * Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or
2287 * SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's
2288 * complete cascaded style to style_clipboard. When you need a CSS string
2289 * for an object in the document tree, you normally call
2290 * sp_style_write_difference instead to take into account the object's parent.
2291 *
2292 * \pre style != NULL.
2293 * \pre flags in {IFSET, ALWAYS}.
2294 * \post ret != NULL.
2295 */
2296 gchar *
2297 sp_style_write_string(SPStyle const *const style, guint const flags)
2298 {
2299 /** \todo
2300 * Merge with write_difference, much duplicate code!
2301 */
2302 g_return_val_if_fail(style != NULL, NULL);
2303 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
2304 (flags == SP_STYLE_FLAG_ALWAYS) ),
2305 NULL);
2307 gchar c[BMAX];
2308 gchar *p = c;
2309 *p = '\0';
2311 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags);
2312 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags);
2313 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags);
2314 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags);
2315 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags);
2317 /* Text */
2318 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags);
2319 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags);
2320 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags);
2321 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags);
2322 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags);
2323 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags);
2324 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags);
2325 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags);
2326 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags);
2327 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags);
2329 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags);
2330 p += sp_style_write_ibaselineshift(p, c + BMAX - p, "baseline-shift", &style->baseline_shift, NULL, flags);
2333 /// \todo fixme: Per type methods need default flag too (lauris)
2335 if (style->opacity.value != SP_SCALE24_MAX) {
2336 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags);
2337 }
2339 if (!style->color.noneSet) { // CSS does not permit "none" for color
2340 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags);
2341 }
2343 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags);
2344 // if fill:none, skip writing fill properties
2345 if (!style->fill.noneSet) {
2346 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags);
2347 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags);
2348 }
2350 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags);
2352 // stroke width affects markers, so write it if there's stroke OR any markers
2353 if (!style->stroke.noneSet ||
2354 style->marker[SP_MARKER_LOC].set ||
2355 style->marker[SP_MARKER_LOC_START].set ||
2356 style->marker[SP_MARKER_LOC_MID].set ||
2357 style->marker[SP_MARKER_LOC_END].set) {
2358 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags);
2359 }
2361 // if stroke:none, skip writing stroke properties
2362 if (!style->stroke.noneSet) {
2363 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags);
2364 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags);
2365 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags);
2366 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags);
2368 /** \todo fixme: */
2369 if ((flags == SP_STYLE_FLAG_ALWAYS)
2370 || style->stroke_dasharray_set)
2371 {
2372 if (style->stroke_dasharray_inherit) {
2373 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2374 } else if (style->stroke_dash.n_dash && style->stroke_dash.dash) {
2375 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2376 gint i;
2377 for (i = 0; i < style->stroke_dash.n_dash; i++) {
2378 Inkscape::CSSOStringStream os;
2379 if (i) {
2380 os << ", ";
2381 }
2382 os << style->stroke_dash.dash[i];
2383 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2384 }
2385 if (p < c + BMAX) {
2386 *p++ = ';';
2387 }
2388 } else {
2389 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;");
2390 }
2391 }
2393 /** \todo fixme: */
2394 if (style->stroke_dashoffset_set) {
2395 if (style->stroke_dashoffset_inherit) {
2396 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:inherit;");
2397 } else {
2398 Inkscape::CSSOStringStream os;
2399 os << "stroke-dashoffset:" << style->stroke_dash.offset << ";";
2400 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2401 }
2402 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2403 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;");
2404 }
2405 }
2407 bool marker_none = false;
2408 gchar *master = style->marker[SP_MARKER_LOC].value;
2409 if (style->marker[SP_MARKER_LOC].set) {
2410 p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value);
2411 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2412 p += g_snprintf(p, c + BMAX - p, "marker:none;");
2413 marker_none = true;
2414 }
2415 if (style->marker[SP_MARKER_LOC_START].set
2416 && (!master || strcmp(master, style->marker[SP_MARKER_LOC_START].value))) {
2417 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value);
2418 } else if (flags == SP_STYLE_FLAG_ALWAYS && !marker_none) {
2419 p += g_snprintf(p, c + BMAX - p, "marker-start:none;");
2420 }
2421 if (style->marker[SP_MARKER_LOC_MID].set
2422 && (!master || strcmp(master, style->marker[SP_MARKER_LOC_MID].value))) {
2423 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value);
2424 } else if (flags == SP_STYLE_FLAG_ALWAYS && !marker_none) {
2425 p += g_snprintf(p, c + BMAX - p, "marker-mid:none;");
2426 }
2427 if (style->marker[SP_MARKER_LOC_END].set
2428 && (!master || strcmp(master, style->marker[SP_MARKER_LOC_END].value))) {
2429 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value);
2430 } else if (flags == SP_STYLE_FLAG_ALWAYS && !marker_none) {
2431 p += g_snprintf(p, c + BMAX - p, "marker-end:none;");
2432 }
2434 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags);
2435 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags);
2436 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags);
2438 /* filter: */
2439 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &style->filter, NULL, flags);
2441 p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &style->enable_background, NULL, flags);
2443 /* fixme: */
2444 p += sp_text_style_write(p, c + BMAX - p, style->text, flags);
2446 /* Get rid of trailing `;'. */
2447 if (p != c) {
2448 --p;
2449 if (*p == ';') {
2450 *p = '\0';
2451 }
2452 }
2454 return g_strdup(c);
2455 }
2458 #define STYLE_BUF_MAX
2461 /**
2462 * Dumps style to CSS string, see sp_style_write_string()
2463 *
2464 * \pre from != NULL.
2465 * \pre to != NULL.
2466 * \post ret != NULL.
2467 */
2468 gchar *
2469 sp_style_write_difference(SPStyle const *const from, SPStyle const *const to)
2470 {
2471 g_return_val_if_fail(from != NULL, NULL);
2472 g_return_val_if_fail(to != NULL, NULL);
2474 gchar c[BMAX], *p = c;
2475 *p = '\0';
2477 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF);
2478 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF);
2479 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF);
2480 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF);
2481 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF);
2483 /* Text */
2484 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF);
2485 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF);
2486 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF);
2487 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF);
2488 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF);
2489 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF);
2490 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF);
2491 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF);
2492 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF);
2493 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF);
2495 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF);
2496 p += sp_style_write_ibaselineshift(p, c + BMAX - p, "baseline-shift", &from->baseline_shift, &to->baseline_shift, SP_STYLE_FLAG_IFDIFF);
2498 /// \todo fixme: Per type methods need default flag too
2499 if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) {
2500 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET);
2501 }
2503 if (!from->color.noneSet) { // CSS does not permit "none" for color
2504 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET);
2505 }
2507 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF);
2508 // if fill:none, skip writing fill properties
2509 if (!from->fill.noneSet) {
2510 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF);
2511 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF);
2512 }
2514 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF);
2516 // stroke width affects markers, so write it if there's stroke OR any markers
2517 if (!from->stroke.noneSet ||
2518 from->marker[SP_MARKER_LOC].set ||
2519 from->marker[SP_MARKER_LOC_START].set ||
2520 from->marker[SP_MARKER_LOC_MID].set ||
2521 from->marker[SP_MARKER_LOC_END].set) {
2522 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF);
2523 }
2525 // if stroke:none, skip writing stroke properties
2526 if (!from->stroke.noneSet) {
2527 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap,
2528 &from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF);
2529 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin,
2530 &from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF);
2531 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit",
2532 &from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF);
2533 /** \todo fixme: */
2534 if (from->stroke_dasharray_set) {
2535 if (from->stroke_dasharray_inherit) {
2536 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2537 } else if (from->stroke_dash.n_dash && from->stroke_dash.dash) {
2538 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2539 for (gint i = 0; i < from->stroke_dash.n_dash; i++) {
2540 Inkscape::CSSOStringStream os;
2541 if (i) {
2542 os << ", ";
2543 }
2544 os << from->stroke_dash.dash[i];
2545 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2546 }
2547 p += g_snprintf(p, c + BMAX - p, ";");
2548 }
2549 }
2550 /* fixme: */
2551 if (from->stroke_dashoffset_set) {
2552 if (from->stroke_dashoffset_inherit) {
2553 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:inherit;");
2554 } else {
2555 Inkscape::CSSOStringStream os;
2556 os << "stroke-dashoffset:" << from->stroke_dash.offset << ";";
2557 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2558 }
2559 }
2560 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF);
2561 }
2563 /* markers */
2564 gchar *master = from->marker[SP_MARKER_LOC].value;
2565 if (master != NULL) {
2566 p += g_snprintf(p, c + BMAX - p, "marker:%s;", master);
2567 }
2568 if (from->marker[SP_MARKER_LOC_START].value != NULL && (!master || strcmp(master, from->marker[SP_MARKER_LOC_START].value))) {
2569 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value);
2570 }
2571 if (from->marker[SP_MARKER_LOC_MID].value != NULL && (!master || strcmp(master, from->marker[SP_MARKER_LOC_MID].value))) {
2572 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value);
2573 }
2574 if (from->marker[SP_MARKER_LOC_END].value != NULL && (!master || strcmp(master, from->marker[SP_MARKER_LOC_END].value))) {
2575 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value);
2576 }
2578 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET);
2579 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET);
2580 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET);
2582 /* filter: */
2583 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &from->filter, &to->filter, SP_STYLE_FLAG_IFDIFF);
2585 p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &from->enable_background, &to->enable_background, SP_STYLE_FLAG_IFSET);
2587 p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF);
2589 /** \todo
2590 * The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF
2591 * flag is mainly only for attributes that don't handle explicit unset well.
2592 * We may need to revisit the behaviour of this routine.
2593 */
2595 /* Get rid of trailing `;'. */
2596 if (p != c) {
2597 --p;
2598 if (*p == ';') {
2599 *p = '\0';
2600 }
2601 }
2603 return g_strdup(c);
2604 }
2608 /**
2609 * Reset all style properties.
2610 */
2611 static void
2612 sp_style_clear(SPStyle *style)
2613 {
2614 g_return_if_fail(style != NULL);
2616 style->fill.clear();
2617 style->stroke.clear();
2618 sp_style_filter_clear(style);
2620 if (style->fill.value.href) {
2621 delete style->fill.value.href;
2622 style->fill.value.href = NULL;
2623 }
2624 if (style->stroke.value.href) {
2625 delete style->stroke.value.href;
2626 style->stroke.value.href = NULL;
2627 }
2628 if (style->filter.href) {
2629 delete style->filter.href;
2630 style->filter.href = NULL;
2631 }
2633 if (style->stroke_dash.dash) {
2634 g_free(style->stroke_dash.dash);
2635 }
2637 style->stroke_dasharray_inherit = FALSE;
2638 style->stroke_dashoffset_inherit = FALSE;
2640 /** \todo fixme: Do that text manipulation via parents */
2641 SPObject *object = style->object;
2642 SPDocument *document = style->document;
2643 gint const refcount = style->refcount;
2644 SPTextStyle *text = style->text;
2645 unsigned const text_private = style->text_private;
2647 memset(style, 0, sizeof(SPStyle));
2649 style->refcount = refcount;
2650 style->object = object;
2651 style->document = document;
2653 if (document) {
2654 style->filter.href = new SPFilterReference(document);
2655 style->filter.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_filter_ref_changed), style));
2657 style->fill.value.href = new SPPaintServerReference(document);
2658 style->fill.value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_fill_paint_server_ref_changed), style));
2660 style->stroke.value.href = new SPPaintServerReference(document);
2661 style->stroke.value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_stroke_paint_server_ref_changed), style));
2662 }
2664 style->text = text;
2665 style->text_private = text_private;
2667 style->text->font_specification.set = FALSE;
2668 style->text->font.set = FALSE;
2669 style->text->font_family.set = FALSE;
2671 style->font_size.set = FALSE;
2672 style->font_size.type = SP_FONT_SIZE_LITERAL;
2673 style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM;
2674 style->font_size.computed = 12.0;
2675 style->font_style.set = FALSE;
2676 style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL;
2677 style->font_variant.set = FALSE;
2678 style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL;
2679 style->font_weight.set = FALSE;
2680 style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL;
2681 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
2682 style->font_stretch.set = FALSE;
2683 style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL;
2685 /* text */
2686 style->text_indent.set = FALSE;
2687 style->text_indent.unit = SP_CSS_UNIT_NONE;
2688 style->text_indent.computed = 0.0;
2690 style->text_align.set = FALSE;
2691 style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START;
2693 style->text_decoration.set = FALSE;
2694 style->text_decoration.underline = FALSE;
2695 style->text_decoration.overline = FALSE;
2696 style->text_decoration.line_through = FALSE;
2697 style->text_decoration.blink = FALSE;
2699 style->line_height.set = FALSE;
2700 style->line_height.unit = SP_CSS_UNIT_PERCENT;
2701 style->line_height.normal = TRUE;
2702 style->line_height.value = style->line_height.computed = 1.0;
2704 style->letter_spacing.set = FALSE;
2705 style->letter_spacing.unit = SP_CSS_UNIT_NONE;
2706 style->letter_spacing.normal = TRUE;
2707 style->letter_spacing.value = style->letter_spacing.computed = 0.0;
2709 style->word_spacing.set = FALSE;
2710 style->word_spacing.unit = SP_CSS_UNIT_NONE;
2711 style->word_spacing.normal = TRUE;
2712 style->word_spacing.value = style->word_spacing.computed = 0.0;
2714 style->baseline_shift.set = FALSE;
2715 style->baseline_shift.type = SP_BASELINE_SHIFT_LITERAL;
2716 style->baseline_shift.unit = SP_CSS_UNIT_NONE;
2717 style->baseline_shift.literal = SP_CSS_BASELINE_SHIFT_BASELINE;
2718 style->baseline_shift.value = 0.0;
2719 style->baseline_shift.computed = 0.0;
2721 style->text_transform.set = FALSE;
2722 style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE;
2724 style->direction.set = FALSE;
2725 style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR;
2727 style->block_progression.set = FALSE;
2728 style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB;
2730 style->writing_mode.set = FALSE;
2731 style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB;
2733 style->text_anchor.set = FALSE;
2734 style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START;
2737 style->opacity.value = SP_SCALE24_MAX;
2738 style->visibility.set = FALSE;
2739 style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE;
2740 style->display.set = FALSE;
2741 style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE;
2742 style->overflow.set = FALSE;
2743 style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE;
2745 style->color.clear();
2746 style->color.setColor(0.0, 0.0, 0.0);
2748 style->fill.clear();
2749 style->fill.setColor(0.0, 0.0, 0.0);
2750 style->fill_opacity.value = SP_SCALE24_MAX;
2751 style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO;
2753 style->stroke.clear();
2754 style->stroke_opacity.value = SP_SCALE24_MAX;
2756 style->stroke_width.set = FALSE;
2757 style->stroke_width.unit = SP_CSS_UNIT_NONE;
2758 style->stroke_width.computed = 1.0;
2760 style->stroke_linecap.set = FALSE;
2761 style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT;
2762 style->stroke_linejoin.set = FALSE;
2763 style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER;
2765 style->stroke_miterlimit.set = FALSE;
2766 style->stroke_miterlimit.value = 4.0;
2768 style->stroke_dash.n_dash = 0;
2769 style->stroke_dash.dash = NULL;
2770 style->stroke_dash.offset = 0.0;
2772 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
2773 g_free(style->marker[i].value);
2774 style->marker[i].set = FALSE;
2775 }
2777 style->enable_background.value = SP_CSS_BACKGROUND_ACCUMULATE;
2778 style->enable_background.set = false;
2779 style->enable_background.inherit = false;
2780 }
2784 /**
2785 *
2786 */
2787 static void
2788 sp_style_read_dash(SPStyle *style, gchar const *str)
2789 {
2790 /* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */
2791 style->stroke_dasharray_set = TRUE;
2793 if (strcmp(str, "inherit") == 0) {
2794 style->stroke_dasharray_inherit = true;
2795 return;
2796 }
2797 style->stroke_dasharray_inherit = false;
2799 NRVpathDash &dash = style->stroke_dash;
2800 g_free(dash.dash);
2801 dash.dash = NULL;
2803 if (strcmp(str, "none") == 0) {
2804 dash.n_dash = 0;
2805 return;
2806 }
2808 gint n_dash = 0;
2809 gdouble d[64];
2810 gchar *e = NULL;
2812 bool LineSolid=true;
2813 while (e != str && n_dash < 64) {
2814 /* TODO: Should allow <length> rather than just a unitless (px) number. */
2815 d[n_dash] = g_ascii_strtod(str, (char **) &e);
2816 if (d[n_dash] > 0.00000001)
2817 LineSolid = false;
2818 if (e != str) {
2819 n_dash += 1;
2820 str = e;
2821 }
2822 while (str && *str && !isalnum(*str)) str += 1;
2823 }
2825 if (LineSolid) {
2826 dash.n_dash = 0;
2827 return;
2828 }
2830 if (n_dash > 0) {
2831 dash.dash = g_new(gdouble, n_dash);
2832 memcpy(dash.dash, d, sizeof(gdouble) * n_dash);
2833 dash.n_dash = n_dash;
2834 }
2835 }
2838 /*#########################
2839 ## SPTextStyle operations
2840 #########################*/
2843 /**
2844 * Return new SPTextStyle object with default settings.
2845 */
2846 static SPTextStyle *
2847 sp_text_style_new()
2848 {
2849 SPTextStyle *ts = g_new0(SPTextStyle, 1);
2850 ts->refcount = 1;
2851 sp_text_style_clear(ts);
2853 ts->font_specification.value = g_strdup("Sans");
2854 ts->font.value = g_strdup("Sans");
2855 ts->font_family.value = g_strdup("Sans");
2857 return ts;
2858 }
2861 /**
2862 * Clear text style settings.
2863 */
2864 static void
2865 sp_text_style_clear(SPTextStyle *ts)
2866 {
2867 ts->font_specification.set = FALSE;
2868 ts->font.set = FALSE;
2869 ts->font_family.set = FALSE;
2870 }
2874 /**
2875 * Reduce refcount of text style and possibly free it.
2876 */
2877 static SPTextStyle *
2878 sp_text_style_unref(SPTextStyle *st)
2879 {
2880 st->refcount -= 1;
2882 if (st->refcount < 1) {
2883 g_free(st->font_specification.value);
2884 g_free(st->font.value);
2885 g_free(st->font_family.value);
2886 g_free(st);
2887 }
2889 return NULL;
2890 }
2894 /**
2895 * Return duplicate of text style.
2896 */
2897 static SPTextStyle *
2898 sp_text_style_duplicate_unset(SPTextStyle *st)
2899 {
2900 SPTextStyle *nt = g_new0(SPTextStyle, 1);
2901 nt->refcount = 1;
2903 nt->font_specification.value = g_strdup(st->font_specification.value);
2904 nt->font.value = g_strdup(st->font.value);
2905 nt->font_family.value = g_strdup(st->font_family.value);
2907 return nt;
2908 }
2912 /**
2913 * Write SPTextStyle object into string.
2914 */
2915 static guint
2916 sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags)
2917 {
2918 gint d = 0;
2920 // We do not do diffing for text style
2921 if (flags == SP_STYLE_FLAG_IFDIFF)
2922 flags = SP_STYLE_FLAG_IFSET;
2924 d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags);
2925 d += sp_style_write_istring(p + d, len - d, "-inkscape-font-specification", &st->font_specification, NULL, flags);
2926 return d;
2927 }
2931 /* The following sp_tyle_read_* functions ignore invalid values, as per
2932 * http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors.
2933 *
2934 * [However, the SVG spec is somewhat unclear as to whether the style attribute should
2935 * be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE
2936 * pairs, in which case SVG's error-handling rules
2937 * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.]
2938 */
2941 /**
2942 * Set SPIFloat object from string.
2943 */
2944 static void
2945 sp_style_read_ifloat(SPIFloat *val, gchar const *str)
2946 {
2947 if (!strcmp(str, "inherit")) {
2948 val->set = TRUE;
2949 val->inherit = TRUE;
2950 } else {
2951 gfloat value;
2952 if (sp_svg_number_read_f(str, &value)) {
2953 val->set = TRUE;
2954 val->inherit = FALSE;
2955 val->value = value;
2956 }
2957 }
2958 }
2962 /**
2963 * Set SPIScale24 object from string.
2964 */
2965 static void
2966 sp_style_read_iscale24(SPIScale24 *val, gchar const *str)
2967 {
2968 if (!strcmp(str, "inherit")) {
2969 val->set = TRUE;
2970 val->inherit = TRUE;
2971 } else {
2972 gfloat value;
2973 if (sp_svg_number_read_f(str, &value)) {
2974 val->set = TRUE;
2975 val->inherit = FALSE;
2976 value = CLAMP(value, 0.0, 1.0);
2977 val->value = SP_SCALE24_FROM_FLOAT(value);
2978 }
2979 }
2980 }
2982 /**
2983 * Reads a style value and performs lookup based on the given style value enumerations.
2984 */
2985 static void
2986 sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict,
2987 bool const can_explicitly_inherit)
2988 {
2989 if ( can_explicitly_inherit && !strcmp(str, "inherit") ) {
2990 val->set = TRUE;
2991 val->inherit = TRUE;
2992 } else {
2993 for (unsigned i = 0; dict[i].key; i++) {
2994 if (!strcmp(str, dict[i].key)) {
2995 val->set = TRUE;
2996 val->inherit = FALSE;
2997 val->value = dict[i].value;
2998 /* Save copying for values not needing it */
2999 val->computed = val->value;
3000 break;
3001 }
3002 }
3003 }
3004 }
3008 /**
3009 * Set SPIString object from string.
3010 */
3011 static void
3012 sp_style_read_istring(SPIString *val, gchar const *str)
3013 {
3014 g_free(val->value);
3016 if (!strcmp(str, "inherit")) {
3017 val->set = TRUE;
3018 val->inherit = TRUE;
3019 val->value = NULL;
3020 } else {
3021 val->set = TRUE;
3022 val->inherit = FALSE;
3023 val->value = g_strdup(str);
3024 }
3025 }
3029 /**
3030 * Set SPILength object from string.
3031 */
3032 static void
3033 sp_style_read_ilength(SPILength *val, gchar const *str)
3034 {
3035 if (!strcmp(str, "inherit")) {
3036 val->set = TRUE;
3037 val->inherit = TRUE;
3038 } else {
3039 gdouble value;
3040 gchar *e;
3041 /** \todo fixme: Move this to standard place (Lauris) */
3042 value = g_ascii_strtod(str, &e);
3043 if ((gchar const *) e != str) {
3044 /** \todo
3045 * Allow the number of px per inch to vary (document preferences,
3046 * X server or whatever). E.g. don't fill in computed here, do
3047 * it at the same time as percentage units are done.
3048 */
3049 if (!*e) {
3050 /* Userspace */
3051 val->unit = SP_CSS_UNIT_NONE;
3052 val->computed = value;
3053 } else if (!strcmp(e, "px")) {
3054 /* Userspace */
3055 val->unit = SP_CSS_UNIT_PX;
3056 val->computed = value;
3057 } else if (!strcmp(e, "pt")) {
3058 /* Userspace / DEVICESCALE */
3059 val->unit = SP_CSS_UNIT_PT;
3060 val->computed = value * PX_PER_PT;
3061 } else if (!strcmp(e, "pc")) {
3062 /* 1 pica = 12pt; FIXME: add it to SPUnit */
3063 val->unit = SP_CSS_UNIT_PC;
3064 val->computed = value * PX_PER_PT * 12;
3065 } else if (!strcmp(e, "mm")) {
3066 val->unit = SP_CSS_UNIT_MM;
3067 val->computed = value * PX_PER_MM;
3068 } else if (!strcmp(e, "cm")) {
3069 val->unit = SP_CSS_UNIT_CM;
3070 val->computed = value * PX_PER_CM;
3071 } else if (!strcmp(e, "in")) {
3072 val->unit = SP_CSS_UNIT_IN;
3073 val->computed = value * PX_PER_IN;
3074 } else if (!strcmp(e, "em")) {
3075 /* EM square */
3076 val->unit = SP_CSS_UNIT_EM;
3077 val->value = value;
3078 } else if (!strcmp(e, "ex")) {
3079 /* ex square */
3080 val->unit = SP_CSS_UNIT_EX;
3081 val->value = value;
3082 } else if (!strcmp(e, "%")) {
3083 /* Percentage */
3084 val->unit = SP_CSS_UNIT_PERCENT;
3085 val->value = value * 0.01;
3086 } else {
3087 /* Invalid */
3088 return;
3089 }
3090 val->set = TRUE;
3091 val->inherit = FALSE;
3092 }
3093 }
3094 }
3096 /**
3097 * Set SPILengthOrNormal object from string.
3098 */
3099 static void
3100 sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str)
3101 {
3102 if (!strcmp(str, "normal")) {
3103 val->set = TRUE;
3104 val->inherit = FALSE;
3105 val->normal = TRUE;
3106 val->unit = SP_CSS_UNIT_NONE;
3107 val->value = val->computed = 0.0;
3108 } else {
3109 SPILength length;
3110 sp_style_read_ilength(&length, str);
3111 val->set = length.set;
3112 val->inherit = length.inherit;
3113 val->normal = FALSE;
3114 val->unit = length.unit;
3115 val->value = length.value;
3116 val->computed = length.computed;
3117 }
3118 }
3120 /**
3121 * Set SPITextDecoration object from string.
3122 */
3123 static void
3124 sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str)
3125 {
3126 if (!strcmp(str, "inherit")) {
3127 val->set = TRUE;
3128 val->inherit = TRUE;
3129 } else if (!strcmp(str, "none")) {
3130 val->set = TRUE;
3131 val->inherit = FALSE;
3132 val->underline = FALSE;
3133 val->overline = FALSE;
3134 val->line_through = FALSE;
3135 val->blink = FALSE;
3136 } else {
3137 bool found_underline = false;
3138 bool found_overline = false;
3139 bool found_line_through = false;
3140 bool found_blink = false;
3141 for ( ; *str ; str++ ) {
3142 if (*str == ' ') continue;
3143 if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) {
3144 found_underline = true;
3145 str += 9;
3146 } else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) {
3147 found_overline = true;
3148 str += 8;
3149 } else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) {
3150 found_line_through = true;
3151 str += 12;
3152 } else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) {
3153 found_blink = true;
3154 str += 5;
3155 } else {
3156 return; // invalid value
3157 }
3158 }
3159 if (!(found_underline || found_overline || found_line_through || found_blink)) {
3160 return; // invalid value: empty
3161 }
3162 val->set = TRUE;
3163 val->inherit = FALSE;
3164 val->underline = found_underline;
3165 val->overline = found_overline;
3166 val->line_through = found_line_through;
3167 val->blink = found_blink;
3168 }
3169 }
3171 /**
3172 * Set SPIPaint object from string containing an integer value.
3173 * \param document Ignored
3174 */
3175 static void
3176 sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
3177 {
3178 (void)style; // TODO
3179 (void)document; // TODO
3180 paint->currentcolor = FALSE; /* currentColor not a valid <color>. */
3181 if (!strcmp(str, "inherit")) {
3182 paint->set = TRUE;
3183 paint->inherit = TRUE;
3184 } else {
3185 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
3186 if (rgb0 != 0xff) {
3187 paint->setColor(rgb0);
3188 paint->set = TRUE;
3189 paint->inherit = FALSE;
3190 }
3191 }
3192 }
3195 /**
3196 * Set SPIPaint object from string.
3197 *
3198 * \pre paint == \&style.fill || paint == \&style.stroke.
3199 */
3200 void SPIPaint::read( gchar const *str, SPStyle &style, SPDocument *document )
3201 {
3202 while (g_ascii_isspace(*str)) {
3203 ++str;
3204 }
3206 clear();
3208 if (streq(str, "inherit")) {
3209 set = TRUE;
3210 inherit = TRUE;
3211 } else {
3212 if ( strneq(str, "url", 3) ) {
3213 gchar *uri = extract_uri( str, &str );
3214 while ( g_ascii_isspace(*str) ) {
3215 ++str;
3216 }
3217 // TODO check on and comment the comparrison "paint != &style->color".
3218 if ( uri && *uri && (this != &style.color) ) {
3219 set = TRUE;
3221 // it may be that this style's SPIPaint has not yet created its URIReference;
3222 // now that we have a document, we can create it here
3223 if (!value.href && document) {
3224 value.href = new SPPaintServerReference(document);
3225 value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun((this == &style.fill)? sp_style_fill_paint_server_ref_changed : sp_style_stroke_paint_server_ref_changed), &style));
3226 }
3228 // TODO check what this does in light of move away from union
3229 sp_style_set_ipaint_to_uri_string (&style, this, uri);
3230 }
3231 g_free( uri );
3232 }
3234 if (streq(str, "currentColor") && (this != &style.color)) {
3235 set = TRUE;
3236 currentcolor = TRUE;
3237 } else if (streq(str, "none") && (this != &style.color)) {
3238 set = TRUE;
3239 noneSet = TRUE;
3240 } else {
3241 guint32 const rgb0 = sp_svg_read_color(str, &str, 0xff);
3242 if (rgb0 != 0xff) {
3243 setColor( rgb0 );
3244 set = TRUE;
3246 while (g_ascii_isspace(*str)) {
3247 ++str;
3248 }
3249 if (strneq(str, "icc-color(", 10)) {
3250 SVGICCColor* tmp = new SVGICCColor();
3251 if ( ! sp_svg_read_icc_color( str, &str, tmp ) ) {
3252 delete tmp;
3253 tmp = 0;
3254 }
3255 value.color.icc = tmp;
3256 }
3257 }
3258 }
3259 }
3260 }
3264 /**
3265 * Set SPIFontSize object from string.
3266 */
3267 static void
3268 sp_style_read_ifontsize(SPIFontSize *val, gchar const *str)
3269 {
3270 if (!strcmp(str, "inherit")) {
3271 val->set = TRUE;
3272 val->inherit = TRUE;
3273 } else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) {
3274 // xx-small, x-small, etc.
3275 for (unsigned i = 0; enum_font_size[i].key; i++) {
3276 if (!strcmp(str, enum_font_size[i].key)) {
3277 val->set = TRUE;
3278 val->inherit = FALSE;
3279 val->type = SP_FONT_SIZE_LITERAL;
3280 val->value = enum_font_size[i].value;
3281 return;
3282 }
3283 }
3284 /* Invalid */
3285 return;
3286 } else {
3287 gdouble value;
3288 gchar *e;
3289 /* fixme: Move this to standard place (Lauris) */
3290 value = g_ascii_strtod(str, &e);
3291 if ((gchar const *) e != str) {
3292 if (!*e) {
3293 /* Userspace */
3294 } else if (!strcmp(e, "px")) {
3295 /* Userspace */
3296 } else if (!strcmp(e, "pt")) {
3297 /* Userspace * DEVICESCALE */
3298 value *= PX_PER_PT;
3299 } else if (!strcmp(e, "pc")) {
3300 /* 12pt */
3301 value *= PX_PER_PT * 12.0;
3302 } else if (!strcmp(e, "mm")) {
3303 value *= PX_PER_MM;
3304 } else if (!strcmp(e, "cm")) {
3305 value *= PX_PER_CM;
3306 } else if (!strcmp(e, "in")) {
3307 value *= PX_PER_IN;
3308 } else if (!strcmp(e, "%")) {
3309 /* Percentage */
3310 val->set = TRUE;
3311 val->inherit = FALSE;
3312 val->type = SP_FONT_SIZE_PERCENTAGE;
3313 val->value = SP_F8_16_FROM_FLOAT(value / 100.0);
3314 return;
3315 } else {
3316 /* Invalid */
3317 return;
3318 }
3319 /* Length */
3320 val->set = TRUE;
3321 val->inherit = FALSE;
3322 val->type = SP_FONT_SIZE_LENGTH;
3323 val->computed = value;
3324 return;
3325 }
3326 }
3327 }
3330 /**
3331 * Set SPIBaselineShift object from string.
3332 */
3333 static void
3334 sp_style_read_ibaselineshift(SPIBaselineShift *val, gchar const *str)
3335 {
3336 if (!strcmp(str, "inherit")) {
3337 val->set = TRUE;
3338 val->inherit = TRUE;
3339 } else if ((*str == 'b') || (*str == 's')) {
3340 // baseline or sub or super
3341 for (unsigned i = 0; enum_baseline_shift[i].key; i++) {
3342 if (!strcmp(str, enum_baseline_shift[i].key)) {
3343 val->set = TRUE;
3344 val->inherit = FALSE;
3345 val->type = SP_BASELINE_SHIFT_LITERAL;
3346 val->literal = enum_baseline_shift[i].value;
3347 return;
3348 }
3349 }
3350 /* Invalid */
3351 return;
3352 } else {
3353 SPILength length;
3354 sp_style_read_ilength(&length, str);
3355 val->set = length.set;
3356 val->inherit = length.inherit;
3357 val->unit = length.unit;
3358 val->value = length.value;
3359 val->computed = length.computed;
3360 if( val->unit == SP_CSS_UNIT_PERCENT ) {
3361 val->type = SP_BASELINE_SHIFT_PERCENTAGE;
3362 } else {
3363 val->type = SP_BASELINE_SHIFT_LENGTH;
3364 }
3365 return;
3366 }
3367 }
3370 /**
3371 * Set SPIFilter object from string.
3372 */
3373 static void
3374 sp_style_read_ifilter(gchar const *str, SPStyle * style, SPDocument *document)
3375 {
3376 SPIFilter *f = &(style->filter);
3377 /* Try all possible values: inherit, none, uri */
3378 if (streq(str, "inherit")) {
3379 f->set = TRUE;
3380 f->inherit = TRUE;
3381 if (f->href && f->href->getObject())
3382 f->href->detach();
3383 } else if(streq(str, "none")) {
3384 f->set = TRUE;
3385 f->inherit = FALSE;
3386 if (f->href && f->href->getObject())
3387 f->href->detach();
3388 } else if (strneq(str, "url", 3)) {
3389 char *uri = extract_uri(str);
3390 if(uri == NULL || uri[0] == '\0') {
3391 g_warning("Specified filter url is empty");
3392 f->set = TRUE;
3393 f->inherit = FALSE;
3394 return;
3395 }
3396 f->set = TRUE;
3397 f->inherit = FALSE;
3398 if (f->href && f->href->getObject())
3399 f->href->detach();
3401 // it may be that this style has not yet created its SPFilterReference;
3402 // now that we have a document, we can create it here
3403 if (!f->href && document) {
3404 f->href = new SPFilterReference(document);
3405 f->href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_filter_ref_changed), style));
3406 }
3408 try {
3409 f->href->attach(Inkscape::URI(uri));
3410 } catch (Inkscape::BadURIException &e) {
3411 g_warning("%s", e.what());
3412 f->href->detach();
3413 }
3414 g_free (uri);
3416 } else {
3417 /* We shouldn't reach this if SVG input is well-formed */
3418 f->set = FALSE;
3419 f->inherit = FALSE;
3420 if (f->href && f->href->getObject())
3421 f->href->detach();
3422 }
3423 }
3425 /**
3426 * Set SPIEnum object from repr attribute.
3427 */
3428 static void
3429 sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr,
3430 gchar const *key, SPStyleEnum const *dict,
3431 bool const can_explicitly_inherit)
3432 {
3433 gchar const *str = repr->attribute(key);
3434 if (str) {
3435 sp_style_read_ienum(val, str, dict, can_explicitly_inherit);
3436 }
3437 }
3441 /**
3442 * Set SPILength object from repr attribute.
3443 */
3444 static void
3445 sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key)
3446 {
3447 gchar const *str = repr->attribute(key);
3448 if (str) {
3449 sp_style_read_ilength(val, str);
3450 }
3451 }
3453 /**
3454 * Set SPIFontSize object from repr attribute.
3455 */
3456 static void
3457 sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key)
3458 {
3459 gchar const *str = repr->attribute(key);
3460 if (str) {
3461 sp_style_read_ifontsize(val, str);
3462 }
3463 }
3466 /**
3467 * Set SPIBaselineShift object from repr attribute.
3468 */
3469 static void
3470 sp_style_read_pbaselineshift(SPIBaselineShift *val, Inkscape::XML::Node *repr, gchar const *key)
3471 {
3472 gchar const *str = repr->attribute(key);
3473 if (str) {
3474 sp_style_read_ibaselineshift(val, str);
3475 }
3476 }
3479 /**
3480 * Set SPIFloat object from repr attribute.
3481 */
3482 static void
3483 sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key)
3484 {
3485 gchar const *str = repr->attribute(key);
3486 if (str) {
3487 sp_style_read_ifloat(val, str);
3488 }
3489 }
3492 /**
3493 * Write SPIFloat object into string.
3494 */
3495 static gint
3496 sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key,
3497 SPIFloat const *const val, SPIFloat const *const base, guint const flags)
3498 {
3499 Inkscape::CSSOStringStream os;
3501 if ((flags & SP_STYLE_FLAG_ALWAYS)
3502 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3503 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3504 && (!base->set || (val->value != base->value))))
3505 {
3506 if (val->inherit) {
3507 return g_snprintf(p, len, "%s:inherit;", key);
3508 } else {
3509 os << key << ":" << val->value << ";";
3510 return g_strlcpy(p, os.str().c_str(), len);
3511 }
3512 }
3513 return 0;
3514 }
3517 /**
3518 * Write SPIScale24 object into string.
3519 */
3520 static gint
3521 sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key,
3522 SPIScale24 const *const val, SPIScale24 const *const base,
3523 guint const flags)
3524 {
3525 Inkscape::CSSOStringStream os;
3527 if ((flags & SP_STYLE_FLAG_ALWAYS)
3528 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3529 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3530 && (!base->set || (val->value != base->value))))
3531 {
3532 if (val->inherit) {
3533 return g_snprintf(p, len, "%s:inherit;", key);
3534 } else {
3535 os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";";
3536 return g_strlcpy(p, os.str().c_str(), len);
3537 }
3538 }
3539 return 0;
3540 }
3543 /**
3544 * Write SPIEnum object into string.
3545 */
3546 static gint
3547 sp_style_write_ienum(gchar *p, gint const len, gchar const *const key,
3548 SPStyleEnum const *const dict,
3549 SPIEnum const *const val, SPIEnum const *const base, guint const flags)
3550 {
3551 if ((flags & SP_STYLE_FLAG_ALWAYS)
3552 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3553 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3554 && (!base->set || (val->computed != base->computed))))
3555 {
3556 if (val->inherit) {
3557 return g_snprintf(p, len, "%s:inherit;", key);
3558 }
3559 for (unsigned i = 0; dict[i].key; i++) {
3560 if (dict[i].value == static_cast< gint > (val->value) ) {
3561 return g_snprintf(p, len, "%s:%s;", key, dict[i].key);
3562 }
3563 }
3564 }
3565 return 0;
3566 }
3570 /**
3571 * Write SPIString object into string.
3572 */
3573 static gint
3574 sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
3575 SPIString const *const val, SPIString const *const base, guint const flags)
3576 {
3577 if ((flags & SP_STYLE_FLAG_ALWAYS)
3578 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3579 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3580 && (!base->set || strcmp(val->value, base->value))))
3581 {
3582 if (val->inherit) {
3583 return g_snprintf(p, len, "%s:inherit;", key);
3584 } else {
3585 gchar *val_quoted = css2_escape_quote(val->value);
3586 if (val_quoted) {
3587 return g_snprintf(p, len, "%s:%s;", key, val_quoted);
3588 g_free (val_quoted);
3589 }
3590 }
3591 }
3592 return 0;
3593 }
3596 /**
3597 *
3598 */
3599 static bool
3600 sp_length_differ(SPILength const *const a, SPILength const *const b)
3601 {
3602 if (a->unit != b->unit) {
3603 if (a->unit == SP_CSS_UNIT_EM) return true;
3604 if (a->unit == SP_CSS_UNIT_EX) return true;
3605 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3606 if (b->unit == SP_CSS_UNIT_EM) return true;
3607 if (b->unit == SP_CSS_UNIT_EX) return true;
3608 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3609 }
3611 return (a->computed != b->computed);
3612 }
3616 /**
3617 * Write SPILength object into string.
3618 */
3619 static gint
3620 sp_style_write_ilength(gchar *p, gint const len, gchar const *const key,
3621 SPILength const *const val, SPILength const *const base, guint const flags)
3622 {
3623 Inkscape::CSSOStringStream os;
3625 if ((flags & SP_STYLE_FLAG_ALWAYS)
3626 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3627 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3628 && (!base->set || sp_length_differ(val, base))))
3629 {
3630 if (val->inherit) {
3631 return g_snprintf(p, len, "%s:inherit;", key);
3632 } else {
3633 switch (val->unit) {
3634 case SP_CSS_UNIT_NONE:
3635 os << key << ":" << val->computed << ";";
3636 return g_strlcpy(p, os.str().c_str(), len);
3637 break;
3638 case SP_CSS_UNIT_PX:
3639 os << key << ":" << val->computed << "px;";
3640 return g_strlcpy(p, os.str().c_str(), len);
3641 break;
3642 case SP_CSS_UNIT_PT:
3643 os << key << ":" << val->computed * PT_PER_PX << "pt;";
3644 return g_strlcpy(p, os.str().c_str(), len);
3645 break;
3646 case SP_CSS_UNIT_PC:
3647 os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;";
3648 return g_strlcpy(p, os.str().c_str(), len);
3649 break;
3650 case SP_CSS_UNIT_MM:
3651 os << key << ":" << val->computed * MM_PER_PX << "mm;";
3652 return g_strlcpy(p, os.str().c_str(), len);
3653 break;
3654 case SP_CSS_UNIT_CM:
3655 os << key << ":" << val->computed * CM_PER_PX << "cm;";
3656 return g_strlcpy(p, os.str().c_str(), len);
3657 break;
3658 case SP_CSS_UNIT_IN:
3659 os << key << ":" << val->computed * IN_PER_PX << "in;";
3660 return g_strlcpy(p, os.str().c_str(), len);
3661 break;
3662 case SP_CSS_UNIT_EM:
3663 os << key << ":" << val->value << "em;";
3664 return g_strlcpy(p, os.str().c_str(), len);
3665 break;
3666 case SP_CSS_UNIT_EX:
3667 os << key << ":" << val->value << "ex;";
3668 return g_strlcpy(p, os.str().c_str(), len);
3669 break;
3670 case SP_CSS_UNIT_PERCENT:
3671 os << key << ":" << (val->value * 100.0) << "%;";
3672 return g_strlcpy(p, os.str().c_str(), len);
3673 break;
3674 default:
3675 /* Invalid */
3676 break;
3677 }
3678 }
3679 }
3680 return 0;
3681 }
3684 /**
3685 *
3686 */
3687 static bool
3688 sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b)
3689 {
3690 if (a->normal != b->normal) return true;
3691 if (a->normal) return false;
3693 if (a->unit != b->unit) {
3694 if (a->unit == SP_CSS_UNIT_EM) return true;
3695 if (a->unit == SP_CSS_UNIT_EX) return true;
3696 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3697 if (b->unit == SP_CSS_UNIT_EM) return true;
3698 if (b->unit == SP_CSS_UNIT_EX) return true;
3699 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3700 }
3702 return (a->computed != b->computed);
3703 }
3705 /**
3706 * Write SPILengthOrNormal object into string.
3707 */
3708 static gint
3709 sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key,
3710 SPILengthOrNormal const *const val,
3711 SPILengthOrNormal const *const base,
3712 guint const flags)
3713 {
3714 if ((flags & SP_STYLE_FLAG_ALWAYS)
3715 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3716 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3717 && (!base->set || sp_lengthornormal_differ(val, base))))
3718 {
3719 if (val->normal) {
3720 return g_snprintf(p, len, "%s:normal;", key);
3721 } else {
3722 SPILength length;
3723 length.set = val->set;
3724 length.inherit = val->inherit;
3725 length.unit = val->unit;
3726 length.value = val->value;
3727 length.computed = val->computed;
3728 return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS);
3729 }
3730 }
3731 return 0;
3732 }
3734 /**
3735 *
3736 */
3737 static bool
3738 sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b)
3739 {
3740 return a->underline != b->underline
3741 || a->overline != b->overline
3742 || a->line_through != b->line_through
3743 || a->blink != b->blink;
3744 }
3746 /**
3747 * Write SPITextDecoration object into string.
3748 */
3749 static gint
3750 sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key,
3751 SPITextDecoration const *const val,
3752 SPITextDecoration const *const base,
3753 guint const flags)
3754 {
3755 Inkscape::CSSOStringStream os;
3757 if ((flags & SP_STYLE_FLAG_ALWAYS)
3758 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3759 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3760 && (!base->set || sp_textdecoration_differ(val, base))))
3761 {
3762 if (val->inherit) {
3763 return g_snprintf(p, len, "%s:inherit;", key);
3764 } else {
3765 os << key << ":";
3766 if (val->underline || val->overline || val->line_through || val->blink) {
3767 if (val->underline) os << " underline";
3768 if (val->overline) os << " overline";
3769 if (val->line_through) os << " line-through";
3770 if (val->blink) os << " blink";
3771 } else
3772 os << "none";
3773 os << ";";
3774 return g_strlcpy(p, os.str().c_str(), len);
3775 }
3776 }
3777 return 0;
3778 }
3780 /**
3781 *
3782 */
3783 static bool
3784 sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
3785 {
3786 if ( (a->isColor() != b->isColor())
3787 || (a->isPaintserver() != b->isPaintserver())
3788 || (a->set != b->set)
3789 || (a->currentcolor != b->currentcolor)
3790 || (a->inherit!= b->inherit) ) {
3791 return true;
3792 }
3794 // TODO refactor to allow for mixed paints (rgb() *and* url(), etc)
3796 if ( a->isPaintserver() ) {
3797 return (a->value.href == NULL || b->value.href == NULL || a->value.href->getObject() != b->value.href->getObject());
3798 }
3800 if ( a->isColor() ) {
3801 return !( (a->value.color == b->value.color)
3802 && ((a->value.color.icc == b->value.color.icc)
3803 || (a->value.color.icc && b->value.color.icc
3804 && (a->value.color.icc->colorProfile == b->value.color.icc->colorProfile)
3805 && (a->value.color.icc->colors == b->value.color.icc->colors))));
3806 /* todo: Allow for epsilon differences in iccColor->colors, e.g. changes small enough not to show up
3807 * in the string representation. */
3808 }
3810 return false;
3811 }
3815 /**
3816 * Write SPIPaint object into string.
3817 */
3818 static gint
3819 sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
3820 SPIPaint const *const paint, SPIPaint const *const base, guint const flags)
3821 {
3822 int retval = 0;
3824 if ((flags & SP_STYLE_FLAG_ALWAYS)
3825 || ((flags & SP_STYLE_FLAG_IFSET) && paint->set)
3826 || ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set
3827 && (!base->set || sp_paint_differ(paint, base))))
3828 {
3829 CSSOStringStream css;
3831 if (paint->inherit) {
3832 css << "inherit";
3833 } else {
3834 if ( paint->value.href && paint->value.href->getURI() ) {
3835 const gchar* uri = paint->value.href->getURI()->toString();
3836 css << "url(" << uri << ")";
3837 }
3839 if ( paint->noneSet ) {
3840 if ( !css.str().empty() ) {
3841 css << " ";
3842 }
3843 css << "none";
3844 }
3846 if ( paint->currentcolor ) {
3847 if ( !css.str().empty() ) {
3848 css << " ";
3849 }
3850 css << "currentColor";
3851 }
3853 if ( paint->colorSet && !paint->currentcolor ) {
3854 if ( !css.str().empty() ) {
3855 css << " ";
3856 }
3857 char color_buf[8];
3858 sp_svg_write_color(color_buf, sizeof(color_buf), paint->value.color.toRGBA32( 0 ));
3859 css << color_buf;
3860 }
3862 if (paint->value.color.icc && !paint->currentcolor) {
3863 if ( !css.str().empty() ) {
3864 css << " ";
3865 }
3866 css << "icc-color(" << paint->value.color.icc->colorProfile;
3867 for (vector<double>::const_iterator i(paint->value.color.icc->colors.begin()),
3868 iEnd(paint->value.color.icc->colors.end());
3869 i != iEnd; ++i) {
3870 css << ", " << *i;
3871 }
3872 css << ')';
3873 }
3874 }
3876 if ( !css.str().empty() ) {
3877 retval = g_snprintf( b, len, "%s:%s;", key, css.str().c_str() );
3878 }
3879 }
3881 return retval;
3882 }
3885 /**
3886 *
3887 */
3888 static bool
3889 sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b)
3890 {
3891 if (a->type != b->type)
3892 return true;
3893 if (a->type == SP_FONT_SIZE_LENGTH) {
3894 if (a->computed != b->computed)
3895 return true;
3896 } else {
3897 if (a->value != b->value)
3898 return true;
3899 }
3900 return false;
3901 }
3904 /**
3905 * Write SPIFontSize object into string.
3906 */
3907 static gint
3908 sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key,
3909 SPIFontSize const *const val, SPIFontSize const *const base,
3910 guint const flags)
3911 {
3912 if ((flags & SP_STYLE_FLAG_ALWAYS)
3913 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3914 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3915 && (!base->set || sp_fontsize_differ(val, base))))
3916 {
3917 if (val->inherit) {
3918 return g_snprintf(p, len, "%s:inherit;", key);
3919 } else if (val->type == SP_FONT_SIZE_LITERAL) {
3920 for (unsigned i = 0; enum_font_size[i].key; i++) {
3921 if (enum_font_size[i].value == static_cast< gint > (val->value) ) {
3922 return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key);
3923 }
3924 }
3925 } else if (val->type == SP_FONT_SIZE_LENGTH) {
3926 Inkscape::CSSOStringStream os;
3927 os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
3928 return g_strlcpy(p, os.str().c_str(), len);
3929 } else if (val->type == SP_FONT_SIZE_PERCENTAGE) {
3930 Inkscape::CSSOStringStream os;
3931 os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;";
3932 return g_strlcpy(p, os.str().c_str(), len);
3933 }
3934 }
3935 return 0;
3936 }
3939 /*
3940 * baseline-shift is relative to parent. The only time it should
3941 * not be written out is if it is zero (or not set).
3942 */
3943 static bool
3944 sp_baseline_shift_notzero(SPIBaselineShift const *const a )
3945 {
3946 if( a->type == SP_BASELINE_SHIFT_LITERAL ) {
3947 if( a->literal == SP_CSS_BASELINE_SHIFT_BASELINE ) {
3948 return false;
3949 }
3950 } else {
3951 if( a->value == 0.0 ) {
3952 return false;
3953 }
3954 }
3955 return true;
3956 }
3958 /**
3959 * Write SPIBaselineShift object into string.
3960 */
3961 static gint
3962 sp_style_write_ibaselineshift(gchar *p, gint const len, gchar const *key,
3963 SPIBaselineShift const *const val, SPIBaselineShift const *const base,
3964 guint const flags)
3965 {
3966 if ((flags & SP_STYLE_FLAG_ALWAYS)
3967 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3968 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3969 && (!base->set || sp_baseline_shift_notzero(val) )))
3970 {
3971 if (val->inherit) {
3972 return g_snprintf(p, len, "%s:inherit;", key);
3973 } else if (val->type == SP_BASELINE_SHIFT_LITERAL) {
3974 for (unsigned i = 0; enum_baseline_shift[i].key; i++) {
3975 if (enum_baseline_shift[i].value == static_cast< gint > (val->literal) ) {
3976 return g_snprintf(p, len, "%s:%s;", key, enum_baseline_shift[i].key);
3977 }
3978 }
3979 } else if (val->type == SP_BASELINE_SHIFT_LENGTH) {
3980 if( val->unit == SP_CSS_UNIT_EM || val->unit == SP_CSS_UNIT_EX ) {
3981 Inkscape::CSSOStringStream os;
3982 os << key << ":" << val->value << (val->unit == SP_CSS_UNIT_EM ? "em;" : "ex;");
3983 return g_strlcpy(p, os.str().c_str(), len);
3984 } else {
3985 Inkscape::CSSOStringStream os;
3986 os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
3987 return g_strlcpy(p, os.str().c_str(), len);
3988 }
3989 } else if (val->type == SP_BASELINE_SHIFT_PERCENTAGE) {
3990 Inkscape::CSSOStringStream os;
3991 os << key << ":" << (val->value * 100.0) << "%;";
3992 return g_strlcpy(p, os.str().c_str(), len);
3993 }
3994 }
3995 return 0;
3996 }
4000 /**
4001 * Write SPIFilter object into string.
4002 */
4003 static gint
4004 sp_style_write_ifilter(gchar *p, gint const len, gchar const *key,
4005 SPIFilter const *const val, SPIFilter const *const base,
4006 guint const flags)
4007 {
4008 (void)base; // TODO
4009 if ((flags & SP_STYLE_FLAG_ALWAYS)
4010 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
4011 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set))
4012 {
4013 if (val->inherit) {
4014 return g_snprintf(p, len, "%s:inherit;", key);
4015 } else if (val->href && val->href->getURI()) {
4016 return g_snprintf(p, len, "%s:url(%s);", key, val->href->getURI()->toString());
4017 }
4018 }
4021 return 0;
4022 }
4024 SPIPaint::SPIPaint() :
4025 set(0),
4026 inherit(0),
4027 currentcolor(0),
4028 colorSet(0),
4029 noneSet(0),
4030 value()
4031 {
4032 value.color.set( 0 );
4033 value.href = 0;
4034 }
4036 void SPIPaint::clear()
4037 {
4038 set = false;
4039 inherit = false;
4040 currentcolor = false;
4041 colorSet = false;
4042 noneSet = false;
4043 value.color.set( 0 );
4044 if ( value.href && value.href->getObject() )
4045 {
4046 value.href->detach();
4047 }
4048 }
4051 /**
4052 * Clear filter object, and disconnect style from paintserver (if present).
4053 */
4054 static void
4055 sp_style_filter_clear(SPStyle *style)
4056 {
4057 if (style->filter.href && style->filter.href->getObject())
4058 style->filter.href->detach();
4059 }
4062 // FIXME: Everything below this line belongs in a different file - css-chemistry?
4064 void
4065 sp_style_set_property_url (SPObject *item, gchar const *property, SPObject *linked, bool recursive)
4066 {
4067 Inkscape::XML::Node *repr = SP_OBJECT_REPR(item);
4069 if (repr == NULL) return;
4071 SPCSSAttr *css = sp_repr_css_attr_new();
4072 if (linked) {
4073 gchar *val = g_strdup_printf("url(#%s)", linked->getId());
4074 sp_repr_css_set_property(css, property, val);
4075 g_free(val);
4076 } else {
4077 sp_repr_css_unset_property(css, "filter");
4078 }
4080 if (recursive) {
4081 sp_repr_css_change_recursive(repr, css, "style");
4082 } else {
4083 sp_repr_css_change(repr, css, "style");
4084 }
4085 sp_repr_css_attr_unref(css);
4086 }
4089 /**
4090 * Clear all style property attributes in object.
4091 */
4092 void
4093 sp_style_unset_property_attrs(SPObject *o)
4094 {
4095 if (!o) return;
4097 SPStyle *style = SP_OBJECT_STYLE(o);
4098 if (!style) return;
4100 Inkscape::XML::Node *repr = SP_OBJECT_REPR(o);
4101 if (!repr) return;
4103 if (style->opacity.set) {
4104 repr->setAttribute("opacity", NULL);
4105 }
4106 if (style->color.set) {
4107 repr->setAttribute("color", NULL);
4108 }
4109 if (style->fill.set) {
4110 repr->setAttribute("fill", NULL);
4111 }
4112 if (style->fill_opacity.set) {
4113 repr->setAttribute("fill-opacity", NULL);
4114 }
4115 if (style->fill_rule.set) {
4116 repr->setAttribute("fill-rule", NULL);
4117 }
4118 if (style->stroke.set) {
4119 repr->setAttribute("stroke", NULL);
4120 }
4121 if (style->stroke_width.set) {
4122 repr->setAttribute("stroke-width", NULL);
4123 }
4124 if (style->stroke_linecap.set) {
4125 repr->setAttribute("stroke-linecap", NULL);
4126 }
4127 if (style->stroke_linejoin.set) {
4128 repr->setAttribute("stroke-linejoin", NULL);
4129 }
4130 if (style->marker[SP_MARKER_LOC].set) {
4131 repr->setAttribute("marker", NULL);
4132 }
4133 if (style->marker[SP_MARKER_LOC_START].set) {
4134 repr->setAttribute("marker-start", NULL);
4135 }
4136 if (style->marker[SP_MARKER_LOC_MID].set) {
4137 repr->setAttribute("marker-mid", NULL);
4138 }
4139 if (style->marker[SP_MARKER_LOC_END].set) {
4140 repr->setAttribute("marker-end", NULL);
4141 }
4142 if (style->stroke_opacity.set) {
4143 repr->setAttribute("stroke-opacity", NULL);
4144 }
4145 if (style->stroke_dasharray_set) {
4146 repr->setAttribute("stroke-dasharray", NULL);
4147 }
4148 if (style->stroke_dashoffset_set) {
4149 repr->setAttribute("stroke-dashoffset", NULL);
4150 }
4151 if (style->text_private && style->text->font_specification.set) {
4152 repr->setAttribute("-inkscape-font-specification", NULL);
4153 }
4154 if (style->text_private && style->text->font_family.set) {
4155 repr->setAttribute("font-family", NULL);
4156 }
4157 if (style->text_anchor.set) {
4158 repr->setAttribute("text-anchor", NULL);
4159 }
4160 if (style->writing_mode.set) {
4161 repr->setAttribute("writing_mode", NULL);
4162 }
4163 if (style->filter.set) {
4164 repr->setAttribute("filter", NULL);
4165 }
4166 if (style->enable_background.set) {
4167 repr->setAttribute("enable-background", NULL);
4168 }
4169 }
4171 /**
4172 * \pre style != NULL.
4173 * \pre flags in {IFSET, ALWAYS}.
4174 */
4175 SPCSSAttr *
4176 sp_css_attr_from_style(SPStyle const *const style, guint const flags)
4177 {
4178 g_return_val_if_fail(style != NULL, NULL);
4179 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
4180 (flags == SP_STYLE_FLAG_ALWAYS) ),
4181 NULL);
4182 gchar *style_str = sp_style_write_string(style, flags);
4183 SPCSSAttr *css = sp_repr_css_attr_new();
4184 sp_repr_css_attr_add_from_string(css, style_str);
4185 g_free(style_str);
4186 return css;
4187 }
4190 /**
4191 * \pre object != NULL
4192 * \pre flags in {IFSET, ALWAYS}.
4193 */
4194 SPCSSAttr *
4195 sp_css_attr_from_object(SPObject *object, guint const flags)
4196 {
4197 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
4198 (flags == SP_STYLE_FLAG_ALWAYS) ),
4199 NULL);
4200 SPStyle const *const style = SP_OBJECT_STYLE(object);
4201 if (style == NULL)
4202 return NULL;
4203 return sp_css_attr_from_style(style, flags);
4204 }
4206 /**
4207 * Unset any text-related properties
4208 */
4209 SPCSSAttr *
4210 sp_css_attr_unset_text(SPCSSAttr *css)
4211 {
4212 sp_repr_css_set_property(css, "font", NULL); // not implemented yet
4213 sp_repr_css_set_property(css, "-inkscape-font-specification", NULL);
4214 sp_repr_css_set_property(css, "font-size", NULL);
4215 sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet
4216 sp_repr_css_set_property(css, "font-style", NULL);
4217 sp_repr_css_set_property(css, "font-variant", NULL);
4218 sp_repr_css_set_property(css, "font-weight", NULL);
4219 sp_repr_css_set_property(css, "font-stretch", NULL);
4220 sp_repr_css_set_property(css, "font-family", NULL);
4221 sp_repr_css_set_property(css, "text-indent", NULL);
4222 sp_repr_css_set_property(css, "text-align", NULL);
4223 sp_repr_css_set_property(css, "text-decoration", NULL);
4224 sp_repr_css_set_property(css, "line-height", NULL);
4225 sp_repr_css_set_property(css, "letter-spacing", NULL);
4226 sp_repr_css_set_property(css, "word-spacing", NULL);
4227 sp_repr_css_set_property(css, "text-transform", NULL);
4228 sp_repr_css_set_property(css, "direction", NULL);
4229 sp_repr_css_set_property(css, "block-progression", NULL);
4230 sp_repr_css_set_property(css, "writing-mode", NULL);
4231 sp_repr_css_set_property(css, "text-anchor", NULL);
4232 sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet
4233 sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet
4234 sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet
4235 sp_repr_css_set_property(css, "baseline-shift", NULL);
4237 return css;
4238 }
4240 bool
4241 is_url(char const *p)
4242 {
4243 if (p == NULL)
4244 return false;
4245 /** \todo
4246 * FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs
4247 * in property values must start with 'url('.
4248 */
4249 return (g_ascii_strncasecmp(p, "url(", 4) == 0);
4250 }
4252 /**
4253 * Unset any properties that contain URI values.
4254 *
4255 * Used for storing style that will be reused across documents when carrying
4256 * the referenced defs is impractical.
4257 */
4258 SPCSSAttr *
4259 sp_css_attr_unset_uris(SPCSSAttr *css)
4260 {
4261 // All properties that may hold <uri> or <paint> according to SVG 1.1
4262 if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL);
4263 if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL);
4264 if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL);
4265 if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL);
4266 if (is_url(sp_repr_css_property(css, "marker", NULL))) sp_repr_css_set_property(css, "marker", NULL);
4267 if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL);
4268 if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL);
4269 if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL);
4270 if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL);
4271 if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL);
4272 if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL);
4274 return css;
4275 }
4277 /**
4278 * Scale a single-value property.
4279 */
4280 void
4281 sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property,
4282 double ex, bool only_with_units = false)
4283 {
4284 gchar const *w = sp_repr_css_property(css, property, NULL);
4285 if (w) {
4286 gchar *units = NULL;
4287 double wd = g_ascii_strtod(w, &units) * ex;
4288 if (w == units) {// nothing converted, non-numeric value
4289 return;
4290 }
4291 if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) {
4292 // only_with_units, but no units found, so do nothing.
4293 return;
4294 }
4295 Inkscape::CSSOStringStream os;
4296 os << wd << units; // reattach units
4297 sp_repr_css_set_property(css, property, os.str().c_str());
4298 }
4299 }
4301 /**
4302 * Scale a list-of-values property.
4303 */
4304 void
4305 sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex)
4306 {
4307 gchar const *string = sp_repr_css_property(css, property, NULL);
4308 if (string) {
4309 Inkscape::CSSOStringStream os;
4310 gchar **a = g_strsplit(string, ",", 10000);
4311 bool first = true;
4312 for (gchar **i = a; i != NULL; i++) {
4313 gchar *w = *i;
4314 if (w == NULL)
4315 break;
4316 gchar *units = NULL;
4317 double wd = g_ascii_strtod(w, &units) * ex;
4318 if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing
4319 g_strfreev(a);
4320 return;
4321 }
4322 if (!first) {
4323 os << ",";
4324 }
4325 os << wd << units; // reattach units
4326 first = false;
4327 }
4328 sp_repr_css_set_property(css, property, os.str().c_str());
4329 g_strfreev(a);
4330 }
4331 }
4333 /**
4334 * Scale any properties that may hold <length> by ex.
4335 */
4336 SPCSSAttr *
4337 sp_css_attr_scale(SPCSSAttr *css, double ex)
4338 {
4339 sp_css_attr_scale_property_single(css, "baseline-shift", ex);
4340 sp_css_attr_scale_property_single(css, "stroke-width", ex);
4341 sp_css_attr_scale_property_list (css, "stroke-dasharray", ex);
4342 sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex);
4343 sp_css_attr_scale_property_single(css, "font-size", ex);
4344 sp_css_attr_scale_property_single(css, "kerning", ex);
4345 sp_css_attr_scale_property_single(css, "letter-spacing", ex);
4346 sp_css_attr_scale_property_single(css, "word-spacing", ex);
4347 sp_css_attr_scale_property_single(css, "line-height", ex, true);
4349 return css;
4350 }
4353 /**
4354 * Remove quotes and escapes from a string. Returned value must be g_free'd.
4355 * Note: in CSS (in style= and in stylesheets), unquoting and unescaping is done
4356 * by libcroco, our CSS parser, though it adds a new pair of "" quotes for the strings
4357 * it parsed for us. So this function is only used to remove those quotes and for
4358 * presentation attributes, without any unescaping. (XML unescaping
4359 * (& etc) is done by XML parser.)
4360 */
4361 gchar *
4362 attribute_unquote(gchar const *val)
4363 {
4364 if (val) {
4365 if (*val == '\'' || *val == '"') {
4366 int l = strlen(val);
4367 if (l >= 2) {
4368 if ( ( val[0] == '"' && val[l - 1] == '"' ) ||
4369 ( val[0] == '\'' && val[l - 1] == '\'' ) ) {
4370 return (g_strndup (val+1, l-2));
4371 }
4372 }
4373 }
4374 }
4376 return (val? g_strdup (val) : NULL);
4377 }
4379 /**
4380 * Quote and/or escape string for writing to CSS (style=). Returned value must be g_free'd.
4381 */
4382 gchar *
4383 css2_escape_quote(gchar const *val) {
4385 Glib::ustring t;
4386 bool quote = false;
4387 bool last_was_space = false;
4389 for (gchar const *i = val; *i; i++) {
4390 bool is_space = ( *i == ' ' );
4391 if (g_ascii_isalnum(*i) || *i=='-' || *i=='_') {
4392 // ASCII alphanumeric, - and _ don't require quotes
4393 t.push_back(*i);
4394 } else if ( is_space && !last_was_space ) {
4395 // non-consecutive spaces don't require quotes
4396 t.push_back(*i);
4397 } else if (*i=='\'') {
4398 // single quotes require escaping and quotes
4399 t.push_back('\\');
4400 t.push_back(*i);
4401 quote = true;
4402 } else {
4403 // everything else requires quotes
4404 t.push_back(*i);
4405 quote = true;
4406 }
4407 if (i == val && !g_ascii_isalpha(*i)) {
4408 // a non-ASCII/non-alpha initial character requires quotes
4409 quote = true;
4410 }
4411 last_was_space = is_space;
4412 }
4414 if (last_was_space) {
4415 // a trailing space requires quotes
4416 quote = true;
4417 }
4419 if (quote) {
4420 // we use single quotes so the result can be stored in an XML
4421 // attribute without incurring un-aesthetic additional quoting
4422 // (our XML emitter always uses double quotes)
4423 t.insert(t.begin(), '\'');
4424 t.push_back('\'');
4425 }
4427 return (t.empty() ? NULL : g_strdup (t.c_str()));
4428 }
4430 /*
4431 Local Variables:
4432 mode:c++
4433 c-file-style:"stroustrup"
4434 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
4435 indent-tabs-mode:nil
4436 fill-column:99
4437 End:
4438 */
4439 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :