1 #define __SP_STYLE_C__
3 /** @file
4 * @brief SVG stylesheets implementation.
5 */
6 /* Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * Peter Moulder <pmoulder@mail.csse.monash.edu.au>
9 * bulia byak <buliabyak@users.sf.net>
10 *
11 * Copyright (C) 2001-2002 Lauris Kaplinski
12 * Copyright (C) 2001 Ximian, Inc.
13 * Copyright (C) 2005 Monash University
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #ifdef HAVE_CONFIG_H
19 # include "config.h"
20 #endif
22 #include <cstring>
23 #include <string>
25 #include "libcroco/cr-sel-eng.h"
26 #include "xml/croco-node-iface.h"
28 #include "svg/svg.h"
29 #include "svg/svg-color.h"
30 #include "svg/svg-icc-color.h"
31 #include "svg/svg-device-color.h"
33 #include "display/canvas-bpath.h"
34 #include "attributes.h"
35 #include "document.h"
36 #include "extract-uri.h"
37 #include "uri-references.h"
38 #include "uri.h"
39 #include "sp-paint-server.h"
40 #include "streq.h"
41 #include "strneq.h"
42 #include "style.h"
43 #include "svg/css-ostringstream.h"
44 #include "xml/repr.h"
45 #include "xml/simple-document.h"
46 #include "unit-constants.h"
47 #include "2geom/isnan.h"
48 #include "macros.h"
49 #include "preferences.h"
51 #include "sp-filter-reference.h"
53 #include <sigc++/functors/ptr_fun.h>
54 #include <sigc++/adaptors/bind.h>
56 using Inkscape::CSSOStringStream;
57 using std::vector;
59 #define BMAX 8192
61 class SPStyleEnum;
63 /*#########################
64 ## FORWARD DECLARATIONS
65 #########################*/
66 static void sp_style_clear(SPStyle *style);
68 static void sp_style_merge_property(SPStyle *style, gint id, gchar const *val);
70 static void sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent);
71 static void sp_style_merge_ifilter(SPStyle *style, SPIFilter const *parent);
72 static void sp_style_read_dash(SPStyle *style, gchar const *str);
74 static SPTextStyle *sp_text_style_new(void);
75 static void sp_text_style_clear(SPTextStyle *ts);
76 static SPTextStyle *sp_text_style_unref(SPTextStyle *st);
77 static SPTextStyle *sp_text_style_duplicate_unset(SPTextStyle *st);
78 static guint sp_text_style_write(gchar *p, guint len, SPTextStyle const *st, guint flags = SP_STYLE_FLAG_IFSET);
79 static void sp_style_privatize_text(SPStyle *style);
81 static void sp_style_read_ifloat(SPIFloat *val, gchar const *str);
82 static void sp_style_read_iscale24(SPIScale24 *val, gchar const *str);
83 static void sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict, bool can_explicitly_inherit);
84 static void sp_style_read_istring(SPIString *val, gchar const *str);
85 static void sp_style_read_ilength(SPILength *val, gchar const *str);
86 static void sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str);
87 static void sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str);
88 static void sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
89 static void sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
90 static void sp_style_read_ifontsize(SPIFontSize *val, gchar const *str);
91 static void sp_style_read_ifilter(gchar const *str, SPStyle *style, SPDocument *document);
93 static void sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr, gchar const *key, SPStyleEnum const *dict, bool can_explicitly_inherit);
94 static void sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key);
95 static void sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key);
96 static void sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key);
98 static gint sp_style_write_ifloat(gchar *p, gint len, gchar const *key, SPIFloat const *val, SPIFloat const *base, guint flags);
99 static gint sp_style_write_iscale24(gchar *p, gint len, gchar const *key, SPIScale24 const *val, SPIScale24 const *base, guint flags);
100 static gint sp_style_write_ienum(gchar *p, gint len, gchar const *key, SPStyleEnum const *dict, SPIEnum const *val, SPIEnum const *base, guint flags);
101 static gint sp_style_write_istring(gchar *p, gint len, gchar const *key, SPIString const *val, SPIString const *base, guint flags);
102 static gint sp_style_write_ilength(gchar *p, gint len, gchar const *key, SPILength const *val, SPILength const *base, guint flags);
103 static gint sp_style_write_ipaint(gchar *b, gint len, gchar const *key, SPIPaint const *paint, SPIPaint const *base, guint flags);
104 static gint sp_style_write_ifontsize(gchar *p, gint len, gchar const *key, SPIFontSize const *val, SPIFontSize const *base, guint flags);
105 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);
106 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);
107 static gint sp_style_write_ifilter(gchar *b, gint len, gchar const *key, SPIFilter const *filter, SPIFilter const *base, guint flags);
109 static void sp_style_filter_clear(SPStyle *style);
111 #define SPS_READ_IENUM_IF_UNSET(v,s,d,i) if (!(v)->set) {sp_style_read_ienum((v), (s), (d), (i));}
112 #define SPS_READ_PENUM_IF_UNSET(v,r,k,d,i) if (!(v)->set) {sp_style_read_penum((v), (r), (k), (d), (i));}
114 #define SPS_READ_ILENGTH_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ilength((v), (s));}
115 #define SPS_READ_PLENGTH_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_plength((v), (r), (k));}
117 #define SPS_READ_PFLOAT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfloat((v), (r), (k));}
119 #define SPS_READ_IFONTSIZE_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ifontsize((v), (s));}
120 #define SPS_READ_PFONTSIZE_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfontsize((v), (r), (k));}
122 static void sp_style_merge_from_object_stylesheet(SPStyle *, SPObject const *);
124 struct SPStyleEnum {
125 gchar const *key;
126 gint value;
127 };
129 static SPStyleEnum const enum_fill_rule[] = {
130 {"nonzero", SP_WIND_RULE_NONZERO},
131 {"evenodd", SP_WIND_RULE_EVENODD},
132 {NULL, -1}
133 };
135 static SPStyleEnum const enum_stroke_linecap[] = {
136 {"butt", SP_STROKE_LINECAP_BUTT},
137 {"round", SP_STROKE_LINECAP_ROUND},
138 {"square", SP_STROKE_LINECAP_SQUARE},
139 {NULL, -1}
140 };
142 static SPStyleEnum const enum_stroke_linejoin[] = {
143 {"miter", SP_STROKE_LINEJOIN_MITER},
144 {"round", SP_STROKE_LINEJOIN_ROUND},
145 {"bevel", SP_STROKE_LINEJOIN_BEVEL},
146 {NULL, -1}
147 };
149 static SPStyleEnum const enum_font_style[] = {
150 {"normal", SP_CSS_FONT_STYLE_NORMAL},
151 {"italic", SP_CSS_FONT_STYLE_ITALIC},
152 {"oblique", SP_CSS_FONT_STYLE_OBLIQUE},
153 {NULL, -1}
154 };
156 static SPStyleEnum const enum_font_size[] = {
157 {"xx-small", SP_CSS_FONT_SIZE_XX_SMALL},
158 {"x-small", SP_CSS_FONT_SIZE_X_SMALL},
159 {"small", SP_CSS_FONT_SIZE_SMALL},
160 {"medium", SP_CSS_FONT_SIZE_MEDIUM},
161 {"large", SP_CSS_FONT_SIZE_LARGE},
162 {"x-large", SP_CSS_FONT_SIZE_X_LARGE},
163 {"xx-large", SP_CSS_FONT_SIZE_XX_LARGE},
164 {"smaller", SP_CSS_FONT_SIZE_SMALLER},
165 {"larger", SP_CSS_FONT_SIZE_LARGER},
166 {NULL, -1}
167 };
169 static SPStyleEnum const enum_font_variant[] = {
170 {"normal", SP_CSS_FONT_VARIANT_NORMAL},
171 {"small-caps", SP_CSS_FONT_VARIANT_SMALL_CAPS},
172 {NULL, -1}
173 };
175 static SPStyleEnum const enum_font_weight[] = {
176 {"100", SP_CSS_FONT_WEIGHT_100},
177 {"200", SP_CSS_FONT_WEIGHT_200},
178 {"300", SP_CSS_FONT_WEIGHT_300},
179 {"400", SP_CSS_FONT_WEIGHT_400},
180 {"500", SP_CSS_FONT_WEIGHT_500},
181 {"600", SP_CSS_FONT_WEIGHT_600},
182 {"700", SP_CSS_FONT_WEIGHT_700},
183 {"800", SP_CSS_FONT_WEIGHT_800},
184 {"900", SP_CSS_FONT_WEIGHT_900},
185 {"normal", SP_CSS_FONT_WEIGHT_NORMAL},
186 {"bold", SP_CSS_FONT_WEIGHT_BOLD},
187 {"lighter", SP_CSS_FONT_WEIGHT_LIGHTER},
188 {"bolder", SP_CSS_FONT_WEIGHT_BOLDER},
189 {NULL, -1}
190 };
192 static SPStyleEnum const enum_font_stretch[] = {
193 {"ultra-condensed", SP_CSS_FONT_STRETCH_ULTRA_CONDENSED},
194 {"extra-condensed", SP_CSS_FONT_STRETCH_EXTRA_CONDENSED},
195 {"condensed", SP_CSS_FONT_STRETCH_CONDENSED},
196 {"semi-condensed", SP_CSS_FONT_STRETCH_SEMI_CONDENSED},
197 {"normal", SP_CSS_FONT_STRETCH_NORMAL},
198 {"semi-expanded", SP_CSS_FONT_STRETCH_SEMI_EXPANDED},
199 {"expanded", SP_CSS_FONT_STRETCH_EXPANDED},
200 {"extra-expanded", SP_CSS_FONT_STRETCH_EXTRA_EXPANDED},
201 {"ultra-expanded", SP_CSS_FONT_STRETCH_ULTRA_EXPANDED},
202 {"narrower", SP_CSS_FONT_STRETCH_NARROWER},
203 {"wider", SP_CSS_FONT_STRETCH_WIDER},
204 {NULL, -1}
205 };
207 static SPStyleEnum const enum_text_align[] = {
208 {"start", SP_CSS_TEXT_ALIGN_START},
209 {"end", SP_CSS_TEXT_ALIGN_END},
210 {"left", SP_CSS_TEXT_ALIGN_LEFT},
211 {"right", SP_CSS_TEXT_ALIGN_RIGHT},
212 {"center", SP_CSS_TEXT_ALIGN_CENTER},
213 {"justify", SP_CSS_TEXT_ALIGN_JUSTIFY},
214 {NULL, -1}
215 };
217 static SPStyleEnum const enum_text_transform[] = {
218 {"capitalize", SP_CSS_TEXT_TRANSFORM_CAPITALIZE},
219 {"uppercase", SP_CSS_TEXT_TRANSFORM_UPPERCASE},
220 {"lowercase", SP_CSS_TEXT_TRANSFORM_LOWERCASE},
221 {"none", SP_CSS_TEXT_TRANSFORM_NONE},
222 {NULL, -1}
223 };
225 static SPStyleEnum const enum_text_anchor[] = {
226 {"start", SP_CSS_TEXT_ANCHOR_START},
227 {"middle", SP_CSS_TEXT_ANCHOR_MIDDLE},
228 {"end", SP_CSS_TEXT_ANCHOR_END},
229 {NULL, -1}
230 };
232 static SPStyleEnum const enum_direction[] = {
233 {"ltr", SP_CSS_DIRECTION_LTR},
234 {"rtl", SP_CSS_DIRECTION_RTL},
235 {NULL, -1}
236 };
238 static SPStyleEnum const enum_block_progression[] = {
239 {"tb", SP_CSS_BLOCK_PROGRESSION_TB},
240 {"rl", SP_CSS_BLOCK_PROGRESSION_RL},
241 {"lr", SP_CSS_BLOCK_PROGRESSION_LR},
242 {NULL, -1}
243 };
245 static SPStyleEnum const enum_writing_mode[] = {
246 /* Note that using the same enumerator for lr as lr-tb means we write as lr-tb even if the
247 * input file said lr. We prefer writing lr-tb on the grounds that the spec says the initial
248 * value is lr-tb rather than lr.
249 *
250 * ECMA scripts may be surprised to find tb-rl in DOM if they set the attribute to rl, so
251 * sharing enumerators for different strings may be a bug (once we support ecma script).
252 */
253 {"lr-tb", SP_CSS_WRITING_MODE_LR_TB},
254 {"rl-tb", SP_CSS_WRITING_MODE_RL_TB},
255 {"tb-rl", SP_CSS_WRITING_MODE_TB_RL},
256 {"lr", SP_CSS_WRITING_MODE_LR_TB},
257 {"rl", SP_CSS_WRITING_MODE_RL_TB},
258 {"tb", SP_CSS_WRITING_MODE_TB_RL},
259 {NULL, -1}
260 };
262 static SPStyleEnum const enum_visibility[] = {
263 {"hidden", SP_CSS_VISIBILITY_HIDDEN},
264 {"collapse", SP_CSS_VISIBILITY_COLLAPSE},
265 {"visible", SP_CSS_VISIBILITY_VISIBLE},
266 {NULL, -1}
267 };
269 static SPStyleEnum const enum_overflow[] = {
270 {"visible", SP_CSS_OVERFLOW_VISIBLE},
271 {"hidden", SP_CSS_OVERFLOW_HIDDEN},
272 {"scroll", SP_CSS_OVERFLOW_SCROLL},
273 {"auto", SP_CSS_OVERFLOW_AUTO},
274 {NULL, -1}
275 };
277 static SPStyleEnum const enum_display[] = {
278 {"none", SP_CSS_DISPLAY_NONE},
279 {"inline", SP_CSS_DISPLAY_INLINE},
280 {"block", SP_CSS_DISPLAY_BLOCK},
281 {"list-item", SP_CSS_DISPLAY_LIST_ITEM},
282 {"run-in", SP_CSS_DISPLAY_RUN_IN},
283 {"compact", SP_CSS_DISPLAY_COMPACT},
284 {"marker", SP_CSS_DISPLAY_MARKER},
285 {"table", SP_CSS_DISPLAY_TABLE},
286 {"inline-table", SP_CSS_DISPLAY_INLINE_TABLE},
287 {"table-row-group", SP_CSS_DISPLAY_TABLE_ROW_GROUP},
288 {"table-header-group", SP_CSS_DISPLAY_TABLE_HEADER_GROUP},
289 {"table-footer-group", SP_CSS_DISPLAY_TABLE_FOOTER_GROUP},
290 {"table-row", SP_CSS_DISPLAY_TABLE_ROW},
291 {"table-column-group", SP_CSS_DISPLAY_TABLE_COLUMN_GROUP},
292 {"table-column", SP_CSS_DISPLAY_TABLE_COLUMN},
293 {"table-cell", SP_CSS_DISPLAY_TABLE_CELL},
294 {"table-caption", SP_CSS_DISPLAY_TABLE_CAPTION},
295 {NULL, -1}
296 };
298 static SPStyleEnum const enum_shape_rendering[] = {
299 {"auto", 0},
300 {"optimizeSpeed", 0},
301 {"crispEdges", 0},
302 {"geometricPrecision", 0},
303 {NULL, -1}
304 };
306 static SPStyleEnum const enum_color_rendering[] = {
307 {"auto", 0},
308 {"optimizeSpeed", 0},
309 {"optimizeQuality", 0},
310 {NULL, -1}
311 };
313 static SPStyleEnum const *const enum_image_rendering = enum_color_rendering;
315 static SPStyleEnum const enum_text_rendering[] = {
316 {"auto", 0},
317 {"optimizeSpeed", 0},
318 {"optimizeLegibility", 0},
319 {"geometricPrecision", 0},
320 {NULL, -1}
321 };
323 static SPStyleEnum const enum_enable_background[] = {
324 {"accumulate", SP_CSS_BACKGROUND_ACCUMULATE},
325 {"new", SP_CSS_BACKGROUND_NEW},
326 {NULL, -1}
327 };
329 /**
330 * Release callback.
331 */
332 static void
333 sp_style_object_release(SPObject *object, SPStyle *style)
334 {
335 (void)object; // TODO
336 style->object = NULL;
337 }
339 /**
340 * Emit style modified signal on style's object if the filter changed.
341 */
342 static void
343 sp_style_filter_ref_modified(SPObject *obj, guint flags, SPStyle *style)
344 {
345 (void)flags; // TODO
346 SPFilter *filter=static_cast<SPFilter *>(obj);
347 if (style->getFilter() == filter)
348 {
349 if (style->object) {
350 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
351 }
352 }
353 }
355 /**
356 * Gets called when the filter is (re)attached to the style
357 */
358 static void
359 sp_style_filter_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
360 {
361 if (old_ref) {
362 style->filter_modified_connection.disconnect();
363 }
364 if ( SP_IS_FILTER(ref))
365 {
366 style->filter_modified_connection =
367 ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_filter_ref_modified), style));
368 }
370 sp_style_filter_ref_modified(ref, 0, style);
371 }
373 /**
374 * Emit style modified signal on style's object if server is style's fill
375 * or stroke paint server.
376 */
377 static void
378 sp_style_paint_server_ref_modified(SPObject *obj, guint flags, SPStyle *style)
379 {
380 (void)flags; // TODO
381 SPPaintServer *server = static_cast<SPPaintServer *>(obj);
383 if ((style->fill.isPaintserver())
384 && style->getFillPaintServer() == server)
385 {
386 if (style->object) {
387 /** \todo
388 * fixme: I do not know, whether it is optimal - we are
389 * forcing reread of everything (Lauris)
390 */
391 /** \todo
392 * fixme: We have to use object_modified flag, because parent
393 * flag is only available downstreams.
394 */
395 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
396 }
397 } else if ((style->stroke.isPaintserver())
398 && style->getStrokePaintServer() == server)
399 {
400 if (style->object) {
401 /// \todo fixme:
402 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
403 }
404 } else if (server) {
405 g_assert_not_reached();
406 }
407 }
409 /**
410 * Gets called when the paintserver is (re)attached to the style
411 */
412 static void
413 sp_style_fill_paint_server_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
414 {
415 if (old_ref) {
416 style->fill_ps_modified_connection.disconnect();
417 }
418 if (SP_IS_PAINT_SERVER(ref)) {
419 style->fill_ps_modified_connection =
420 ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_paint_server_ref_modified), style));
421 }
423 sp_style_paint_server_ref_modified(ref, 0, style);
424 }
426 /**
427 * Gets called when the paintserver is (re)attached to the style
428 */
429 static void
430 sp_style_stroke_paint_server_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
431 {
432 if (old_ref) {
433 style->stroke_ps_modified_connection.disconnect();
434 }
435 if (SP_IS_PAINT_SERVER(ref)) {
436 style->stroke_ps_modified_connection =
437 ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_paint_server_ref_modified), style));
438 }
440 sp_style_paint_server_ref_modified(ref, 0, style);
441 }
443 /**
444 * Returns a new SPStyle object with settings as per sp_style_clear().
445 */
446 SPStyle *
447 sp_style_new(SPDocument *document)
448 {
449 SPStyle *const style = g_new0(SPStyle, 1);
451 style->refcount = 1;
452 style->object = NULL;
453 style->document = document;
454 style->text = sp_text_style_new();
455 style->text_private = TRUE;
457 sp_style_clear(style);
459 style->cloned = false;
461 new (&style->release_connection) sigc::connection();
462 new (&style->filter_modified_connection) sigc::connection();
463 new (&style->fill_ps_modified_connection) sigc::connection();
464 new (&style->stroke_ps_modified_connection) sigc::connection();
466 return style;
467 }
470 /**
471 * Creates a new SPStyle object, and attaches it to the specified SPObject.
472 */
473 SPStyle *
474 sp_style_new_from_object(SPObject *object)
475 {
476 g_return_val_if_fail(object != NULL, NULL);
477 g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
479 SPStyle *style = sp_style_new(SP_OBJECT_DOCUMENT(object));
480 style->object = object;
481 style->release_connection = object->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_object_release), style));
483 if (object && SP_OBJECT_IS_CLONED(object)) {
484 style->cloned = true;
485 }
487 return style;
488 }
491 /**
492 * Increase refcount of style.
493 */
494 SPStyle *
495 sp_style_ref(SPStyle *style)
496 {
497 g_return_val_if_fail(style != NULL, NULL);
498 g_return_val_if_fail(style->refcount > 0, NULL);
500 style->refcount += 1;
502 return style;
503 }
506 /**
507 * Decrease refcount of style with possible destruction.
508 */
509 SPStyle *
510 sp_style_unref(SPStyle *style)
511 {
512 g_return_val_if_fail(style != NULL, NULL);
513 g_return_val_if_fail(style->refcount > 0, NULL);
515 style->refcount -= 1;
517 if (style->refcount < 1) {
518 style->release_connection.disconnect();
519 style->release_connection.~connection();
520 if (style->text) sp_text_style_unref(style->text);
522 if (style->fill.value.href) {
523 style->fill_ps_modified_connection.disconnect();
524 delete style->fill.value.href;
525 style->fill.value.href = NULL;
526 }
527 if (style->stroke.value.href) {
528 style->stroke_ps_modified_connection.disconnect();
529 delete style->stroke.value.href;
530 style->stroke.value.href = NULL;
531 }
532 if (style->filter.href) {
533 style->filter_modified_connection.disconnect();
534 delete style->filter.href;
535 style->filter.href = NULL;
536 }
538 style->filter_modified_connection.~connection();
539 style->fill_ps_modified_connection.~connection();
540 style->stroke_ps_modified_connection.~connection();
542 style->fill.clear();
543 style->stroke.clear();
544 sp_style_filter_clear(style);
546 g_free(style->stroke_dash.dash);
547 g_free(style);
548 }
550 return NULL;
551 }
553 /**
554 * Reads the various style parameters for an object from repr.
555 */
556 static void
557 sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
558 {
559 g_assert(style != NULL);
560 g_assert(repr != NULL);
561 g_assert(!object || (SP_OBJECT_REPR(object) == repr));
563 sp_style_clear(style);
565 if (object && SP_OBJECT_IS_CLONED(object)) {
566 style->cloned = true;
567 }
569 /* 1. Style attribute */
570 gchar const *val = repr->attribute("style");
571 if (val != NULL) {
572 sp_style_merge_from_style_string(style, val);
573 }
575 if (object) {
576 sp_style_merge_from_object_stylesheet(style, object);
577 } else {
578 /** \todo No stylesheet information. Find out under what circumstances
579 * this occurs, and handle accordingly. (If we really wanted to, we
580 * could probably get stylesheets by going through repr->doc.)
581 */
582 }
584 /* 2. Presentation attributes */
585 /* CSS2 */
586 SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true);
587 SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true);
588 SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true);
589 /* Font */
590 SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size");
591 SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true);
592 SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true);
593 SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true);
594 SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true);
595 /* Text (css2 chapter 16) */
596 SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent");
597 SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true);
598 if (!style->text_decoration.set) {
599 val = repr->attribute("text-decoration");
600 if (val) {
601 sp_style_read_itextdecoration(&style->text_decoration, val);
602 }
603 }
604 if (!style->line_height.set) {
605 val = repr->attribute("line-height");
606 if (val) {
607 sp_style_read_ilengthornormal(&style->line_height, val);
608 }
609 }
610 if (!style->letter_spacing.set) {
611 val = repr->attribute("letter-spacing");
612 if (val) {
613 sp_style_read_ilengthornormal(&style->letter_spacing, val);
614 }
615 }
616 if (!style->word_spacing.set) {
617 val = repr->attribute("word-spacing");
618 if (val) {
619 sp_style_read_ilengthornormal(&style->word_spacing, val);
620 }
621 }
622 SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true);
623 SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true);
624 SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true);
626 /* SVG */
627 SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode",
628 enum_writing_mode, true);
629 SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor",
630 enum_text_anchor, true);
632 /* opacity */
633 if (!style->opacity.set) {
634 val = repr->attribute("opacity");
635 if (val) {
636 sp_style_read_iscale24(&style->opacity, val);
637 }
638 }
639 /* color */
640 if (!style->color.set) {
641 val = repr->attribute("color");
642 if (val) {
643 sp_style_read_icolor(&style->color, val, style, ( object
644 ? SP_OBJECT_DOCUMENT(object)
645 : NULL ));
646 }
647 }
648 /* fill */
649 if (!style->fill.set) {
650 val = repr->attribute("fill");
651 if (val) {
652 sp_style_read_ipaint(&style->fill, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
653 }
654 }
655 /* fill-opacity */
656 if (!style->fill_opacity.set) {
657 val = repr->attribute("fill-opacity");
658 if (val) {
659 sp_style_read_iscale24(&style->fill_opacity, val);
660 }
661 }
662 /* fill-rule */
663 SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true);
664 /* stroke */
665 if (!style->stroke.set) {
666 val = repr->attribute("stroke");
667 if (val) {
668 sp_style_read_ipaint(&style->stroke, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
669 }
670 }
671 SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width");
672 SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true);
673 SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true);
674 SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit");
676 /* markers */
677 if (!style->marker[SP_MARKER_LOC].set) {
678 val = repr->attribute("marker");
679 if (val) {
680 sp_style_read_istring(&style->marker[SP_MARKER_LOC], val);
681 }
682 }
683 if (!style->marker[SP_MARKER_LOC_START].set) {
684 val = repr->attribute("marker-start");
685 if (val) {
686 sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val);
687 }
688 }
689 if (!style->marker[SP_MARKER_LOC_MID].set) {
690 val = repr->attribute("marker-mid");
691 if (val) {
692 sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val);
693 }
694 }
695 if (!style->marker[SP_MARKER_LOC_END].set) {
696 val = repr->attribute("marker-end");
697 if (val) {
698 sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val);
699 }
700 }
702 /* stroke-opacity */
703 if (!style->stroke_opacity.set) {
704 val = repr->attribute("stroke-opacity");
705 if (val) {
706 sp_style_read_iscale24(&style->stroke_opacity, val);
707 }
708 }
709 if (!style->stroke_dasharray_set) {
710 val = repr->attribute("stroke-dasharray");
711 if (val) {
712 sp_style_read_dash(style, val);
713 }
714 }
716 if (!style->stroke_dashoffset_set) {
717 val = repr->attribute("stroke-dashoffset");
718 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
719 style->stroke_dashoffset_set = TRUE;
720 } else if (val && !strcmp(val, "inherit")) {
721 style->stroke_dashoffset_set = TRUE;
722 style->stroke_dashoffset_inherit = TRUE;
723 } else {
724 style->stroke_dashoffset_set = FALSE;
725 }
726 }
728 /* -inkscape-font-specification */
729 if (!style->text_private || !style->text->font_specification.set) {
730 val = repr->attribute("-inkscape-font-specification");
731 if (val) {
732 if (!style->text_private) sp_style_privatize_text(style);
733 gchar *val_unquoted = attribute_unquote(val);
734 sp_style_read_istring(&style->text->font_specification, val_unquoted);
735 if (val_unquoted) g_free (val_unquoted);
736 }
737 }
739 /* font-family */
740 if (!style->text_private || !style->text->font_family.set) {
741 val = repr->attribute("font-family");
742 if (val) {
743 if (!style->text_private) sp_style_privatize_text(style);
744 gchar *val_unquoted = attribute_unquote(val);
745 sp_style_read_istring(&style->text->font_family, val_unquoted);
746 if (val_unquoted) g_free (val_unquoted);
747 }
748 }
750 /* filter effects */
751 if (!style->filter.set) {
752 val = repr->attribute("filter");
753 if (val) {
754 sp_style_read_ifilter(val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
755 }
756 }
757 SPS_READ_PENUM_IF_UNSET(&style->enable_background, repr,
758 "enable-background", enum_enable_background, true);
760 /* 3. Merge from parent */
761 if (object) {
762 if (object->parent) {
763 sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent));
764 }
765 } else {
766 if (sp_repr_parent(repr)) {
767 /// \todo fixme: This is not the prettiest thing (Lauris)
768 SPStyle *parent = sp_style_new(NULL);
769 sp_style_read(parent, NULL, sp_repr_parent(repr));
770 sp_style_merge_from_parent(style, parent);
771 sp_style_unref(parent);
772 }
773 }
774 }
777 /**
778 * Read style properties from object's repr.
779 *
780 * 1. Reset existing object style
781 * 2. Load current effective object style
782 * 3. Load i attributes from immediate parent (which has to be up-to-date)
783 */
784 void
785 sp_style_read_from_object(SPStyle *style, SPObject *object)
786 {
787 g_return_if_fail(style != NULL);
788 g_return_if_fail(object != NULL);
789 g_return_if_fail(SP_IS_OBJECT(object));
791 Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
792 g_return_if_fail(repr != NULL);
794 sp_style_read(style, object, repr);
795 }
798 /**
799 * Read style properties from preferences.
800 * @param style The style to write to
801 * @param path Preferences directory from which the style should be read
802 */
803 void
804 sp_style_read_from_prefs(SPStyle *style, Glib::ustring const &path)
805 {
806 g_return_if_fail(style != NULL);
807 g_return_if_fail(path != "");
809 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
811 // not optimal: we reconstruct the node based on the prefs, then pass it to
812 // sp_style_read for actual processing.
813 Inkscape::XML::SimpleDocument *tempdoc = new Inkscape::XML::SimpleDocument;
814 Inkscape::XML::Node *tempnode = tempdoc->createElement("temp");
816 std::vector<Inkscape::Preferences::Entry> attrs = prefs->getAllEntries(path);
817 for (std::vector<Inkscape::Preferences::Entry>::iterator i = attrs.begin(); i != attrs.end(); ++i) {
818 tempnode->setAttribute(i->getEntryName().data(), i->getString().data());
819 }
821 sp_style_read(style, NULL, tempnode);
823 Inkscape::GC::release(tempnode);
824 Inkscape::GC::release(tempdoc);
825 delete tempdoc;
826 }
830 /**
831 *
832 */
833 static void
834 sp_style_privatize_text(SPStyle *style)
835 {
836 SPTextStyle *text = style->text;
837 style->text = sp_text_style_duplicate_unset(style->text);
838 sp_text_style_unref(text);
839 style->text_private = TRUE;
840 }
843 /**
844 * Merge property into style.
845 *
846 * Should be called in order of highest to lowest precedence.
847 * E.g. for a single style string, call from the last declaration to the first,
848 * as CSS says that later declarations override earlier ones.
849 *
850 * \pre val != NULL.
851 */
852 static void
853 sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
854 {
855 g_return_if_fail(val != NULL);
857 switch (id) {
858 case SP_PROP_INKSCAPE_FONT_SPEC:
859 if (!style->text_private) sp_style_privatize_text(style);
860 if (!style->text->font_specification.set) {
861 gchar *val_unquoted = attribute_unquote(val);
862 sp_style_read_istring(&style->text->font_specification, val_unquoted);
863 if (val_unquoted) g_free (val_unquoted);
864 }
865 break;
866 /* CSS2 */
867 /* Font */
868 case SP_PROP_FONT_FAMILY:
869 if (!style->text_private) sp_style_privatize_text(style);
870 if (!style->text->font_family.set) {
871 gchar *val_unquoted = attribute_unquote(val);
872 sp_style_read_istring(&style->text->font_family, val_unquoted);
873 if (val_unquoted) g_free (val_unquoted);
874 }
875 break;
876 case SP_PROP_FONT_SIZE:
877 SPS_READ_IFONTSIZE_IF_UNSET(&style->font_size, val);
878 break;
879 case SP_PROP_FONT_SIZE_ADJUST:
880 if (strcmp(val, "none") != 0) {
881 g_warning("Unimplemented style property id SP_PROP_FONT_SIZE_ADJUST: value: %s", val);
882 }
883 break;
884 case SP_PROP_FONT_STYLE:
885 SPS_READ_IENUM_IF_UNSET(&style->font_style, val, enum_font_style, true);
886 break;
887 case SP_PROP_FONT_VARIANT:
888 SPS_READ_IENUM_IF_UNSET(&style->font_variant, val, enum_font_variant, true);
889 break;
890 case SP_PROP_FONT_WEIGHT:
891 SPS_READ_IENUM_IF_UNSET(&style->font_weight, val, enum_font_weight, true);
892 break;
893 case SP_PROP_FONT_STRETCH:
894 SPS_READ_IENUM_IF_UNSET(&style->font_stretch, val, enum_font_stretch, true);
895 break;
896 case SP_PROP_FONT:
897 if (!style->text_private) sp_style_privatize_text(style);
898 if (!style->text->font.set) {
899 g_free(style->text->font.value);
900 style->text->font.value = g_strdup(val);
901 style->text->font.set = TRUE;
902 style->text->font.inherit = (val && !strcmp(val, "inherit"));
903 }
904 break;
905 /* Text */
906 case SP_PROP_TEXT_INDENT:
907 SPS_READ_ILENGTH_IF_UNSET(&style->text_indent, val);
908 break;
909 case SP_PROP_TEXT_ALIGN:
910 SPS_READ_IENUM_IF_UNSET(&style->text_align, val, enum_text_align, true);
911 break;
912 case SP_PROP_TEXT_DECORATION:
913 if (!style->text_decoration.set) {
914 sp_style_read_itextdecoration(&style->text_decoration, val);
915 }
916 break;
917 case SP_PROP_LINE_HEIGHT:
918 if (!style->line_height.set) {
919 sp_style_read_ilengthornormal(&style->line_height, val);
920 }
921 break;
922 case SP_PROP_LETTER_SPACING:
923 if (!style->letter_spacing.set) {
924 sp_style_read_ilengthornormal(&style->letter_spacing, val);
925 }
926 break;
927 case SP_PROP_WORD_SPACING:
928 if (!style->word_spacing.set) {
929 sp_style_read_ilengthornormal(&style->word_spacing, val);
930 }
931 break;
932 case SP_PROP_TEXT_TRANSFORM:
933 SPS_READ_IENUM_IF_UNSET(&style->text_transform, val, enum_text_transform, true);
934 break;
935 /* Text (css3) */
936 case SP_PROP_DIRECTION:
937 SPS_READ_IENUM_IF_UNSET(&style->direction, val, enum_direction, true);
938 break;
939 case SP_PROP_BLOCK_PROGRESSION:
940 SPS_READ_IENUM_IF_UNSET(&style->block_progression, val, enum_block_progression, true);
941 break;
942 case SP_PROP_WRITING_MODE:
943 SPS_READ_IENUM_IF_UNSET(&style->writing_mode, val, enum_writing_mode, true);
944 break;
945 case SP_PROP_TEXT_ANCHOR:
946 SPS_READ_IENUM_IF_UNSET(&style->text_anchor, val, enum_text_anchor, true);
947 break;
948 /* Text (unimplemented) */
949 case SP_PROP_TEXT_RENDERING: {
950 /* Ignore the hint. */
951 SPIEnum dummy;
952 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_text_rendering, true);
953 break;
954 }
955 case SP_PROP_ALIGNMENT_BASELINE:
956 g_warning("Unimplemented style property SP_PROP_ALIGNMENT_BASELINE: value: %s", val);
957 break;
958 case SP_PROP_BASELINE_SHIFT:
959 g_warning("Unimplemented style property SP_PROP_BASELINE_SHIFT: value: %s", val);
960 break;
961 case SP_PROP_DOMINANT_BASELINE:
962 g_warning("Unimplemented style property SP_PROP_DOMINANT_BASELINE: value: %s", val);
963 break;
964 case SP_PROP_GLYPH_ORIENTATION_HORIZONTAL:
965 g_warning("Unimplemented style property SP_PROP_ORIENTATION_HORIZONTAL: value: %s", val);
966 break;
967 case SP_PROP_GLYPH_ORIENTATION_VERTICAL:
968 g_warning("Unimplemented style property SP_PROP_ORIENTATION_VERTICAL: value: %s", val);
969 break;
970 case SP_PROP_KERNING:
971 g_warning("Unimplemented style property SP_PROP_KERNING: value: %s", val);
972 break;
973 /* Misc */
974 case SP_PROP_CLIP:
975 g_warning("Unimplemented style property SP_PROP_CLIP: value: %s", val);
976 break;
977 case SP_PROP_COLOR:
978 if (!style->color.set) {
979 sp_style_read_icolor(&style->color, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
980 }
981 break;
982 case SP_PROP_CURSOR:
983 g_warning("Unimplemented style property SP_PROP_CURSOR: value: %s", val);
984 break;
985 case SP_PROP_DISPLAY:
986 SPS_READ_IENUM_IF_UNSET(&style->display, val, enum_display, true);
987 break;
988 case SP_PROP_OVERFLOW:
989 /** \todo
990 * FIXME: not supported properly yet, we just read and write it,
991 * but act as if it is always "display".
992 */
993 SPS_READ_IENUM_IF_UNSET(&style->overflow, val, enum_overflow, true);
994 break;
995 case SP_PROP_VISIBILITY:
996 SPS_READ_IENUM_IF_UNSET(&style->visibility, val, enum_visibility, true);
997 break;
998 /* SVG */
999 /* Clip/Mask */
1000 case SP_PROP_CLIP_PATH:
1001 /** \todo
1002 * This is a workaround. Inkscape only supports 'clip-path' as SVG attribute, not as
1003 * style property. By having both CSS and SVG attribute set, editing of clip-path
1004 * will fail, since CSS always overwrites SVG attributes.
1005 * Fixes Bug #324849
1006 */
1007 g_warning("attribute 'clip-path' given as CSS");
1008 style->object->repr->setAttribute("clip-path", val);
1009 break;
1010 case SP_PROP_CLIP_RULE:
1011 g_warning("Unimplemented style property SP_PROP_CLIP_RULE: value: %s", val);
1012 break;
1013 case SP_PROP_MASK:
1014 /** \todo
1015 * See comment for SP_PROP_CLIP_PATH
1016 */
1017 g_warning("attribute 'mask' given as CSS");
1018 style->object->repr->setAttribute("mask", val);
1019 break;
1020 case SP_PROP_OPACITY:
1021 if (!style->opacity.set) {
1022 sp_style_read_iscale24(&style->opacity, val);
1023 }
1024 break;
1025 case SP_PROP_ENABLE_BACKGROUND:
1026 SPS_READ_IENUM_IF_UNSET(&style->enable_background, val,
1027 enum_enable_background, true);
1028 break;
1029 /* Filter */
1030 case SP_PROP_FILTER:
1031 if (!style->filter.set && !style->filter.inherit) {
1032 sp_style_read_ifilter(val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
1033 }
1034 break;
1035 case SP_PROP_FLOOD_COLOR:
1036 g_warning("Unimplemented style property SP_PROP_FLOOD_COLOR: value: %s", val);
1037 break;
1038 case SP_PROP_FLOOD_OPACITY:
1039 g_warning("Unimplemented style property SP_PROP_FLOOD_OPACITY: value: %s", val);
1040 break;
1041 case SP_PROP_LIGHTING_COLOR:
1042 g_warning("Unimplemented style property SP_PROP_LIGHTING_COLOR: value: %s", val);
1043 break;
1044 /* Gradient */
1045 case SP_PROP_STOP_COLOR:
1046 g_warning("Unimplemented style property SP_PROP_STOP_COLOR: value: %s", val);
1047 break;
1048 case SP_PROP_STOP_OPACITY:
1049 g_warning("Unimplemented style property SP_PROP_STOP_OPACITY: value: %s", val);
1050 break;
1051 /* Interactivity */
1052 case SP_PROP_POINTER_EVENTS:
1053 g_warning("Unimplemented style property SP_PROP_POINTER_EVENTS: value: %s", val);
1054 break;
1055 /* Paint */
1056 case SP_PROP_COLOR_INTERPOLATION:
1057 g_warning("Unimplemented style property SP_PROP_COLOR_INTERPOLATION: value: %s", val);
1058 break;
1059 case SP_PROP_COLOR_INTERPOLATION_FILTERS:
1060 g_warning("Unimplemented style property SP_PROP_INTERPOLATION_FILTERS: value: %s", val);
1061 break;
1062 case SP_PROP_COLOR_PROFILE:
1063 g_warning("Unimplemented style property SP_PROP_COLOR_PROFILE: value: %s", val);
1064 break;
1065 case SP_PROP_COLOR_RENDERING: {
1066 /* Ignore the hint. */
1067 SPIEnum dummy;
1068 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_color_rendering, true);
1069 break;
1070 }
1071 case SP_PROP_FILL:
1072 if (!style->fill.set) {
1073 sp_style_read_ipaint(&style->fill, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
1074 }
1075 break;
1076 case SP_PROP_FILL_OPACITY:
1077 if (!style->fill_opacity.set) {
1078 sp_style_read_iscale24(&style->fill_opacity, val);
1079 }
1080 break;
1081 case SP_PROP_FILL_RULE:
1082 if (!style->fill_rule.set) {
1083 sp_style_read_ienum(&style->fill_rule, val, enum_fill_rule, true);
1084 }
1085 break;
1086 case SP_PROP_IMAGE_RENDERING: {
1087 /* Ignore the hint. */
1088 SPIEnum dummy;
1089 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_image_rendering, true);
1090 break;
1091 }
1092 case SP_PROP_MARKER:
1093 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1094 /* style->marker[SP_MARKER_LOC] = g_quark_from_string(val); */
1095 if (!style->marker[SP_MARKER_LOC].set) {
1096 g_free(style->marker[SP_MARKER_LOC].value);
1097 style->marker[SP_MARKER_LOC].value = g_strdup(val);
1098 style->marker[SP_MARKER_LOC].set = TRUE;
1099 style->marker[SP_MARKER_LOC].inherit = (val && !strcmp(val, "inherit"));
1100 }
1101 break;
1103 case SP_PROP_MARKER_START:
1104 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1105 if (!style->marker[SP_MARKER_LOC_START].set) {
1106 g_free(style->marker[SP_MARKER_LOC_START].value);
1107 style->marker[SP_MARKER_LOC_START].value = g_strdup(val);
1108 style->marker[SP_MARKER_LOC_START].set = TRUE;
1109 style->marker[SP_MARKER_LOC_START].inherit = (val && !strcmp(val, "inherit"));
1110 }
1111 break;
1112 case SP_PROP_MARKER_MID:
1113 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1114 if (!style->marker[SP_MARKER_LOC_MID].set) {
1115 g_free(style->marker[SP_MARKER_LOC_MID].value);
1116 style->marker[SP_MARKER_LOC_MID].value = g_strdup(val);
1117 style->marker[SP_MARKER_LOC_MID].set = TRUE;
1118 style->marker[SP_MARKER_LOC_MID].inherit = (val && !strcmp(val, "inherit"));
1119 }
1120 break;
1121 case SP_PROP_MARKER_END:
1122 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1123 if (!style->marker[SP_MARKER_LOC_END].set) {
1124 g_free(style->marker[SP_MARKER_LOC_END].value);
1125 style->marker[SP_MARKER_LOC_END].value = g_strdup(val);
1126 style->marker[SP_MARKER_LOC_END].set = TRUE;
1127 style->marker[SP_MARKER_LOC_END].inherit = (val && !strcmp(val, "inherit"));
1128 }
1129 break;
1131 case SP_PROP_SHAPE_RENDERING: {
1132 /* Ignore the hint. */
1133 SPIEnum dummy;
1134 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_shape_rendering, true);
1135 break;
1136 }
1138 case SP_PROP_STROKE:
1139 if (!style->stroke.set) {
1140 sp_style_read_ipaint(&style->stroke, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
1141 }
1142 break;
1143 case SP_PROP_STROKE_WIDTH:
1144 SPS_READ_ILENGTH_IF_UNSET(&style->stroke_width, val);
1145 break;
1146 case SP_PROP_STROKE_DASHARRAY:
1147 if (!style->stroke_dasharray_set) {
1148 sp_style_read_dash(style, val);
1149 }
1150 break;
1151 case SP_PROP_STROKE_DASHOFFSET:
1152 if (!style->stroke_dashoffset_set) {
1153 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
1154 style->stroke_dashoffset_set = TRUE;
1155 } else if (val && !strcmp(val, "inherit")) {
1156 style->stroke_dashoffset_set = TRUE;
1157 style->stroke_dashoffset_inherit = TRUE;
1158 } else {
1159 style->stroke_dashoffset_set = FALSE;
1160 }
1161 }
1162 break;
1163 case SP_PROP_STROKE_LINECAP:
1164 if (!style->stroke_linecap.set) {
1165 sp_style_read_ienum(&style->stroke_linecap, val, enum_stroke_linecap, true);
1166 }
1167 break;
1168 case SP_PROP_STROKE_LINEJOIN:
1169 if (!style->stroke_linejoin.set) {
1170 sp_style_read_ienum(&style->stroke_linejoin, val, enum_stroke_linejoin, true);
1171 }
1172 break;
1173 case SP_PROP_STROKE_MITERLIMIT:
1174 if (!style->stroke_miterlimit.set) {
1175 sp_style_read_ifloat(&style->stroke_miterlimit, val);
1176 }
1177 break;
1178 case SP_PROP_STROKE_OPACITY:
1179 if (!style->stroke_opacity.set) {
1180 sp_style_read_iscale24(&style->stroke_opacity, val);
1181 }
1182 break;
1184 default:
1185 g_warning("Invalid style property id: %d value: %s", id, val);
1186 break;
1187 }
1188 }
1190 static void
1191 sp_style_merge_style_from_decl(SPStyle *const style, CRDeclaration const *const decl)
1192 {
1193 /** \todo Ensure that property is lcased, as per
1194 * http://www.w3.org/TR/REC-CSS2/syndata.html#q4.
1195 * Should probably be done in libcroco.
1196 */
1197 unsigned const prop_idx = sp_attribute_lookup(decl->property->stryng->str);
1198 if (prop_idx != SP_ATTR_INVALID) {
1199 /** \todo
1200 * effic: Test whether the property is already set before trying to
1201 * convert to string. Alternatively, set from CRTerm directly rather
1202 * than converting to string.
1203 */
1204 guchar *const str_value_unsigned = cr_term_to_string(decl->value);
1205 gchar *const str_value = reinterpret_cast<gchar *>(str_value_unsigned);
1206 sp_style_merge_property(style, prop_idx, str_value);
1207 g_free(str_value);
1208 }
1209 }
1211 static void
1212 sp_style_merge_from_props(SPStyle *const style, CRPropList *const props)
1213 {
1214 #if 0 /* forwards */
1215 for (CRPropList const *cur = props; cur; cur = cr_prop_list_get_next(cur)) {
1216 CRDeclaration *decl = NULL;
1217 cr_prop_list_get_decl(cur, &decl);
1218 sp_style_merge_style_from_decl(style, decl);
1219 }
1220 #else /* in reverse order, as we need later declarations to take precedence over earlier ones. */
1221 if (props) {
1222 sp_style_merge_from_props(style, cr_prop_list_get_next(props));
1223 CRDeclaration *decl = NULL;
1224 cr_prop_list_get_decl(props, &decl);
1225 sp_style_merge_style_from_decl(style, decl);
1226 }
1227 #endif
1228 }
1230 /**
1231 * \pre decl_list != NULL
1232 */
1233 static void
1234 sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list)
1235 {
1236 // read the decls from end to start, using head recursion, so that latter declarations override
1237 // (Ref: http://www.w3.org/TR/REC-CSS2/cascade.html#cascading-order point 4.)
1238 // because sp_style_merge_style_from_decl only sets properties that are unset
1239 if (decl_list->next) {
1240 sp_style_merge_from_decl_list(style, decl_list->next);
1241 }
1242 sp_style_merge_style_from_decl(style, decl_list);
1243 }
1245 static CRSelEng *
1246 sp_repr_sel_eng()
1247 {
1248 CRSelEng *const ret = cr_sel_eng_new();
1249 cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface);
1251 /** \todo
1252 * Check whether we need to register any pseudo-class handlers.
1253 * libcroco has its own default handlers for first-child and lang.
1254 *
1255 * We probably want handlers for link and arguably visited (though
1256 * inkscape can't visit links at the time of writing). hover etc.
1257 * more useful in inkview than the editor inkscape.
1258 *
1259 * http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that
1260 * the following should be honoured, at least by inkview:
1261 * :hover, :active, :focus, :visited, :link.
1262 */
1264 g_assert(ret);
1265 return ret;
1266 }
1268 static void
1269 sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object)
1270 {
1271 static CRSelEng *sel_eng = NULL;
1272 if (!sel_eng) {
1273 sel_eng = sp_repr_sel_eng();
1274 }
1276 CRPropList *props = NULL;
1277 CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng,
1278 object->document->style_cascade,
1279 object->repr,
1280 &props);
1281 g_return_if_fail(status == CR_OK);
1282 /// \todo Check what errors can occur, and handle them properly.
1283 if (props) {
1284 sp_style_merge_from_props(style, props);
1285 cr_prop_list_destroy(props);
1286 }
1287 }
1289 /**
1290 * Parses a style="..." string and merges it with an existing SPStyle.
1291 */
1292 void
1293 sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p)
1294 {
1295 /*
1296 * Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute:
1297 * ``When CSS styling is used, CSS inline style is specified by including
1298 * semicolon-separated property declarations of the form "name : value"
1299 * within the style attribute''.
1300 *
1301 * That's fairly ambiguous. Is a `value' allowed to contain semicolons?
1302 * Why does it say "including", what else is allowed in the style
1303 * attribute value?
1304 */
1306 CRDeclaration *const decl_list
1307 = cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8);
1308 if (decl_list) {
1309 sp_style_merge_from_decl_list(style, decl_list);
1310 cr_declaration_destroy(decl_list);
1311 }
1312 }
1314 /** Indexed by SP_CSS_FONT_SIZE_blah. */
1315 static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0};
1317 static void
1318 sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent)
1319 {
1320 /* 'font-size' */
1321 if (!child.set || child.inherit) {
1322 /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
1323 child.computed = parent.computed;
1324 } else if (child.type == SP_FONT_SIZE_LITERAL) {
1325 /** \todo
1326 * fixme: SVG and CSS do not specify clearly, whether we should use
1327 * user or screen coordinates (Lauris)
1328 */
1329 if (child.value < SP_CSS_FONT_SIZE_SMALLER) {
1330 child.computed = font_size_table[child.value];
1331 } else if (child.value == SP_CSS_FONT_SIZE_SMALLER) {
1332 child.computed = parent.computed / 1.2;
1333 } else if (child.value == SP_CSS_FONT_SIZE_LARGER) {
1334 child.computed = parent.computed * 1.2;
1335 } else {
1336 /* Illegal value */
1337 }
1338 } else if (child.type == SP_FONT_SIZE_PERCENTAGE) {
1339 /* Unlike most other lengths, percentage for font size is relative to parent computed value
1340 * rather than viewport. */
1341 child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value);
1342 }
1343 }
1345 /**
1346 * Sets computed values in \a style, which may involve inheriting from (or in some other way
1347 * calculating from) corresponding computed values of \a parent.
1348 *
1349 * References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default.
1350 * http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to
1351 * inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise
1352 * about what the computed value is (not obvious for lengths).
1353 *
1354 * \pre \a parent's computed values are already up-to-date.
1355 */
1356 void
1357 sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent)
1358 {
1359 g_return_if_fail(style != NULL);
1361 /** \todo
1362 * fixme: Check for existing callers that might pass null parent.
1363 * This should probably be g_return_if_fail, or else we should make a
1364 * best attempt to set computed values correctly without having a parent
1365 * (i.e., by assuming parent has initial values).
1366 */
1367 if (!parent)
1368 return;
1370 /* CSS2 */
1371 /* Font */
1372 sp_style_merge_font_size_from_parent(style->font_size, parent->font_size);
1374 /* 'font-style' */
1375 if (!style->font_style.set || style->font_style.inherit) {
1376 style->font_style.computed = parent->font_style.computed;
1377 }
1379 /* 'font-variant' */
1380 if (!style->font_variant.set || style->font_variant.inherit) {
1381 style->font_variant.computed = parent->font_variant.computed;
1382 }
1384 /* 'font-weight' */
1385 if (!style->font_weight.set || style->font_weight.inherit) {
1386 style->font_weight.computed = parent->font_weight.computed;
1387 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) {
1388 /** \todo
1389 * fixme: This is unconditional, i.e., happens even if parent not
1390 * present.
1391 */
1392 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
1393 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) {
1394 style->font_weight.computed = SP_CSS_FONT_WEIGHT_700;
1395 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) {
1396 unsigned const parent_val = parent->font_weight.computed;
1397 g_assert(SP_CSS_FONT_WEIGHT_100 == 0);
1398 // strictly, 'bolder' and 'lighter' should go to the next weight
1399 // expressible in the current font family, but that's difficult to
1400 // find out, so jumping by 3 seems an appropriate approximation
1401 style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3
1402 ? (unsigned)SP_CSS_FONT_WEIGHT_100
1403 : parent_val - 3);
1404 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1405 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) {
1406 unsigned const parent_val = parent->font_weight.computed;
1407 g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900);
1408 style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3
1409 ? (unsigned)SP_CSS_FONT_WEIGHT_900
1410 : parent_val + 3);
1411 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1412 }
1414 /* 'font-stretch' */
1415 if (!style->font_stretch.set || style->font_stretch.inherit) {
1416 style->font_stretch.computed = parent->font_stretch.computed;
1417 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) {
1418 unsigned const parent_val = parent->font_stretch.computed;
1419 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED
1420 ? parent_val
1421 : parent_val - 1);
1422 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1423 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) {
1424 unsigned const parent_val = parent->font_stretch.computed;
1425 g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1426 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED
1427 ? parent_val
1428 : parent_val + 1);
1429 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1430 }
1432 /* text (css2) */
1433 if (!style->text_indent.set || style->text_indent.inherit) {
1434 style->text_indent.computed = parent->text_indent.computed;
1435 }
1437 if (!style->text_align.set || style->text_align.inherit) {
1438 style->text_align.computed = parent->text_align.computed;
1439 }
1441 if (!style->text_decoration.set || style->text_decoration.inherit) {
1442 style->text_decoration.underline = parent->text_decoration.underline;
1443 style->text_decoration.overline = parent->text_decoration.overline;
1444 style->text_decoration.line_through = parent->text_decoration.line_through;
1445 style->text_decoration.blink = parent->text_decoration.blink;
1446 }
1448 if (!style->line_height.set || style->line_height.inherit) {
1449 style->line_height.value = parent->line_height.value;
1450 style->line_height.computed = parent->line_height.computed;
1451 style->line_height.normal = parent->line_height.normal;
1452 }
1454 if (!style->letter_spacing.set || style->letter_spacing.inherit) {
1455 style->letter_spacing.value = parent->letter_spacing.value;
1456 style->letter_spacing.computed = parent->letter_spacing.computed;
1457 style->letter_spacing.normal = parent->letter_spacing.normal;
1458 }
1460 if (!style->word_spacing.set || style->word_spacing.inherit) {
1461 style->word_spacing.value = parent->word_spacing.value;
1462 style->word_spacing.computed = parent->word_spacing.computed;
1463 style->word_spacing.normal = parent->word_spacing.normal;
1464 }
1466 if (!style->text_transform.set || style->text_transform.inherit) {
1467 style->text_transform.computed = parent->text_transform.computed;
1468 }
1470 if (!style->direction.set || style->direction.inherit) {
1471 style->direction.computed = parent->direction.computed;
1472 }
1474 if (!style->block_progression.set || style->block_progression.inherit) {
1475 style->block_progression.computed = parent->block_progression.computed;
1476 }
1478 if (!style->writing_mode.set || style->writing_mode.inherit) {
1479 style->writing_mode.computed = parent->writing_mode.computed;
1480 }
1482 if (!style->text_anchor.set || style->text_anchor.inherit) {
1483 style->text_anchor.computed = parent->text_anchor.computed;
1484 }
1486 if (style->opacity.inherit) {
1487 style->opacity.value = parent->opacity.value;
1488 }
1490 /* Color */
1491 if (!style->color.set || style->color.inherit) {
1492 sp_style_merge_ipaint(style, &style->color, &parent->color);
1493 }
1495 /* Fill */
1496 if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) {
1497 sp_style_merge_ipaint(style, &style->fill, &parent->fill);
1498 }
1500 if (!style->fill_opacity.set || style->fill_opacity.inherit) {
1501 style->fill_opacity.value = parent->fill_opacity.value;
1502 }
1504 if (!style->fill_rule.set || style->fill_rule.inherit) {
1505 style->fill_rule.computed = parent->fill_rule.computed;
1506 }
1508 /* Stroke */
1509 if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) {
1510 sp_style_merge_ipaint(style, &style->stroke, &parent->stroke);
1511 }
1513 if (!style->stroke_width.set || style->stroke_width.inherit) {
1514 style->stroke_width.computed = parent->stroke_width.computed;
1515 } else {
1516 /* Update computed value for any change in font inherited from parent. */
1517 double const em = style->font_size.computed;
1518 if (style->stroke_width.unit == SP_CSS_UNIT_EM) {
1519 style->stroke_width.computed = style->stroke_width.value * em;
1520 } else if (style->stroke_width.unit == SP_CSS_UNIT_EX) {
1521 double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango.
1522 style->stroke_width.computed = style->stroke_width.value * ex;
1523 }
1524 }
1526 if (!style->stroke_linecap.set || style->stroke_linecap.inherit) {
1527 style->stroke_linecap.computed = parent->stroke_linecap.computed;
1528 }
1530 if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) {
1531 style->stroke_linejoin.computed = parent->stroke_linejoin.computed;
1532 }
1534 if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) {
1535 style->stroke_miterlimit.value = parent->stroke_miterlimit.value;
1536 }
1538 if (!style->stroke_dasharray_set || style->stroke_dasharray_inherit) {
1539 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1540 if (style->stroke_dash.n_dash > 0) {
1541 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1542 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1543 }
1544 }
1546 if (!style->stroke_dashoffset_set || style->stroke_dashoffset_inherit) {
1547 style->stroke_dash.offset = parent->stroke_dash.offset;
1548 }
1550 if (!style->stroke_opacity.set || style->stroke_opacity.inherit) {
1551 style->stroke_opacity.value = parent->stroke_opacity.value;
1552 }
1554 if (style->text && parent->text) {
1555 if (!style->text->font_family.set || style->text->font_family.inherit) {
1556 g_free(style->text->font_family.value);
1557 style->text->font_family.value = g_strdup(parent->text->font_family.value);
1558 }
1559 }
1561 if (style->text && parent->text) {
1562 if (!style->text->font_specification.set || style->text->font_specification.inherit) {
1563 g_free(style->text->font_specification.value);
1564 style->text->font_specification.value = g_strdup(parent->text->font_specification.value);
1565 }
1566 }
1568 /* Markers - Free the old value and make copy of the new */
1569 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1570 if (!style->marker[i].set || style->marker[i].inherit) {
1571 g_free(style->marker[i].value);
1572 style->marker[i].value = g_strdup(parent->marker[i].value);
1573 }
1574 }
1576 /* Filter effects */
1577 if (style->filter.inherit) {
1578 sp_style_merge_ifilter(style, &parent->filter);
1579 }
1581 if(style->enable_background.inherit) {
1582 style->enable_background.value = parent->enable_background.value;
1583 }
1584 }
1586 template <typename T>
1587 static void
1588 sp_style_merge_prop_from_dying_parent(T &child, T const &parent)
1589 {
1590 if ( ( !(child.set) || child.inherit )
1591 && parent.set && !(parent.inherit) )
1592 {
1593 child = parent;
1594 }
1595 }
1597 /**
1598 * Copy SPIString from parent to child.
1599 */
1600 static void
1601 sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent)
1602 {
1603 if ( ( !(child.set) || child.inherit )
1604 && parent.set && !(parent.inherit) )
1605 {
1606 g_free(child.value);
1607 child.value = g_strdup(parent.value);
1608 child.set = parent.set;
1609 child.inherit = parent.inherit;
1610 }
1611 }
1613 static void
1614 sp_style_merge_paint_prop_from_dying_parent(SPStyle *style,
1615 SPIPaint &child, SPIPaint const &parent)
1616 {
1617 /** \todo
1618 * I haven't given this much attention. See comments below about
1619 * currentColor, colorProfile, and relative URIs.
1620 */
1621 if (!child.set || child.inherit) {
1622 sp_style_merge_ipaint(style, &child, &parent);
1623 child.set = parent.set;
1624 child.inherit = parent.inherit;
1625 }
1626 }
1628 static void
1629 sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent,
1630 unsigned const max_computed_val,
1631 unsigned const smaller_val)
1632 {
1633 /* We assume that min computed val is 0, contiguous up to max_computed_val,
1634 then zero or more other absolute values, then smaller_val then larger_val. */
1635 unsigned const min_computed_val = 0;
1636 unsigned const larger_val = smaller_val + 1;
1637 g_return_if_fail(min_computed_val < max_computed_val);
1638 g_return_if_fail(max_computed_val < smaller_val);
1640 if (parent.set && !parent.inherit) {
1641 if (!child.set || child.inherit) {
1642 child.value = parent.value;
1643 child.set = parent.set; // i.e. true
1644 child.inherit = parent.inherit; // i.e. false
1645 } else if (child.value < smaller_val) {
1646 /* Child has absolute value: leave as is. */
1647 } else if ( ( child.value == smaller_val
1648 && parent.value == larger_val )
1649 || ( parent.value == smaller_val
1650 && child.value == larger_val ) )
1651 {
1652 child.set = false;
1653 /*
1654 * Note that this can result in a change in computed value in the
1655 * rare case that the parent's setting was a no-op (i.e. if the
1656 * parent's parent's computed value was already ultra-condensed or
1657 * ultra-expanded). However, I'd guess that the change is for the
1658 * better: I'd guess that if the properties were specified
1659 * relatively, then the intent is to counteract parent's effect.
1660 * I.e. I believe this is the best code even in that case.
1661 */
1662 } else if (child.value == parent.value) {
1663 /* Leave as is. */
1664 /** \todo
1665 * It's unclear what to do if style and parent specify the same
1666 * relative directive (narrower or wider). We can either convert
1667 * to absolute specification or coalesce to a single relative
1668 * request (of half the strength of the original pair).
1669 *
1670 * Converting to a single level of relative specification is a
1671 * better choice if the newly-unlinked clone is itself cloned to
1672 * other contexts (inheriting different font stretchiness): it
1673 * would preserve the effect that it will be narrower than
1674 * the inherited context in each case. The disadvantage is that
1675 * it will ~certainly affect the computed value of the
1676 * newly-unlinked clone.
1677 */
1678 } else {
1679 unsigned const parent_val = parent.computed;
1680 child.value = ( child.value == smaller_val
1681 ? ( parent_val == min_computed_val
1682 ? parent_val
1683 : parent_val - 1 )
1684 : ( parent_val == max_computed_val
1685 ? parent_val
1686 : parent_val + 1 ) );
1687 g_assert(child.value <= max_computed_val);
1688 child.inherit = false;
1689 g_assert(child.set);
1690 }
1691 }
1692 }
1694 template <typename LengthT>
1695 static void
1696 sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent,
1697 double const parent_child_em_ratio)
1698 {
1699 if ( ( !(child.set) || child.inherit )
1700 && parent.set && !(parent.inherit) )
1701 {
1702 child = parent;
1703 switch (parent.unit) {
1704 case SP_CSS_UNIT_EM:
1705 case SP_CSS_UNIT_EX:
1706 child.value *= parent_child_em_ratio;
1707 /** \todo
1708 * fixme: Have separate ex ratio parameter.
1709 * Get x height from libnrtype or pango.
1710 */
1711 if (!IS_FINITE(child.value)) {
1712 child.value = child.computed;
1713 child.unit = SP_CSS_UNIT_NONE;
1714 }
1715 break;
1717 default:
1718 break;
1719 }
1720 }
1721 }
1723 static double
1724 get_relative_font_size_frac(SPIFontSize const &font_size)
1725 {
1726 switch (font_size.type) {
1727 case SP_FONT_SIZE_LITERAL: {
1728 switch (font_size.value) {
1729 case SP_CSS_FONT_SIZE_SMALLER:
1730 return 5.0 / 6.0;
1732 case SP_CSS_FONT_SIZE_LARGER:
1733 return 6.0 / 5.0;
1735 default:
1736 g_assert_not_reached();
1737 }
1738 }
1740 case SP_FONT_SIZE_PERCENTAGE:
1741 return SP_F8_16_TO_FLOAT(font_size.value);
1743 case SP_FONT_SIZE_LENGTH:
1744 g_assert_not_reached();
1745 }
1746 g_assert_not_reached();
1747 }
1749 /**
1750 * Combine \a style and \a parent style specifications into a single style specification that
1751 * preserves (as much as possible) the effect of the existing \a style being a child of \a parent.
1752 *
1753 * Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being
1754 * unlinked), in which case we copy/adapt property values that are explicitly set in \a parent,
1755 * trying to retain the same visual appearance once the parent is removed. Interesting cases are
1756 * when there is unusual interaction with the parent's value (opacity, display) or when the value
1757 * can be specified as relative to the parent computed value (font-size, font-weight etc.).
1758 *
1759 * Doesn't update computed values of \a style. For correctness, you should subsequently call
1760 * sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a
1761 * style was previously up-to-date wrt \a parent.
1762 *
1763 * \pre \a parent's computed values are already up-to-date.
1764 * (\a style's computed values needn't be up-to-date.)
1765 */
1766 void
1767 sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent)
1768 {
1769 /** \note
1770 * The general rule for each property is as follows:
1771 *
1772 * If style is set to an absolute value, then leave it as is.
1773 *
1774 * Otherwise (i.e. if style has a relative value):
1775 *
1776 * If parent is set to an absolute value, then set style to the computed value.
1777 *
1778 * Otherwise, calculate the combined relative value (e.g. multiplying the two percentages).
1779 */
1781 /* We do font-size first, to ensure that em size is up-to-date. */
1782 /** \todo
1783 * fixme: We'll need to have more font-related things up the top once
1784 * we're getting x-height from pango or libnrtype.
1785 */
1787 /* Some things that allow relative specifications. */
1788 {
1789 /* font-size. Note that we update the computed font-size of style,
1790 to assist in em calculations later in this function. */
1791 if (parent->font_size.set && !parent->font_size.inherit) {
1792 if (!style->font_size.set || style->font_size.inherit) {
1793 /* font_size inherits the computed value, so we can use the parent value
1794 * verbatim. */
1795 style->font_size = parent->font_size;
1796 } else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) {
1797 /* Child already has absolute size (stored in computed value), so do nothing. */
1798 } else if ( style->font_size.type == SP_FONT_SIZE_LITERAL
1799 && style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) {
1800 /* Child already has absolute size, but we ensure that the computed value
1801 is up-to-date. */
1802 unsigned const ix = style->font_size.value;
1803 g_assert(ix < G_N_ELEMENTS(font_size_table));
1804 style->font_size.computed = font_size_table[ix];
1805 } else {
1806 /* Child has relative size. */
1807 double const child_frac(get_relative_font_size_frac(style->font_size));
1808 style->font_size.set = true;
1809 style->font_size.inherit = false;
1810 style->font_size.computed = parent->font_size.computed * child_frac;
1812 if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL
1813 && parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER )
1814 || parent->font_size.type == SP_FONT_SIZE_LENGTH )
1815 {
1816 /* Absolute value. */
1817 style->font_size.type = SP_FONT_SIZE_LENGTH;
1818 /* .value is unused for SP_FONT_SIZE_LENGTH. */
1819 } else {
1820 /* Relative value. */
1821 double const parent_frac(get_relative_font_size_frac(parent->font_size));
1822 style->font_size.type = SP_FONT_SIZE_PERCENTAGE;
1823 style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac);
1824 }
1825 }
1826 }
1828 /* 'font-stretch' */
1829 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch,
1830 parent->font_stretch,
1831 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
1832 SP_CSS_FONT_STRETCH_NARROWER);
1834 /* font-weight */
1835 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight,
1836 parent->font_weight,
1837 SP_CSS_FONT_WEIGHT_900,
1838 SP_CSS_FONT_WEIGHT_LIGHTER);
1839 }
1842 /* Enum values that don't have any relative settings (other than `inherit'). */
1843 {
1844 SPIEnum SPStyle::*const fields[] = {
1845 //nyi: SPStyle::clip_rule,
1846 //nyi: SPStyle::color_interpolation,
1847 //nyi: SPStyle::color_interpolation_filters,
1848 //nyi: SPStyle::color_rendering,
1849 &SPStyle::direction,
1850 &SPStyle::fill_rule,
1851 &SPStyle::font_style,
1852 &SPStyle::font_variant,
1853 //nyi: SPStyle::image_rendering,
1854 //nyi: SPStyle::pointer_events,
1855 //nyi: SPStyle::shape_rendering,
1856 &SPStyle::stroke_linecap,
1857 &SPStyle::stroke_linejoin,
1858 &SPStyle::text_anchor,
1859 //nyi: &SPStyle::text_rendering,
1860 &SPStyle::visibility,
1861 &SPStyle::writing_mode
1862 };
1864 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1865 SPIEnum SPStyle::*const fld = fields[i];
1866 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld);
1867 }
1868 }
1870 /* A few other simple inheritance properties. */
1871 {
1872 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity);
1873 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity);
1874 sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit);
1876 /** \todo
1877 * We currently treat text-decoration as if it were a simple inherited
1878 * property (fixme). This code may need changing once we do the
1879 * special fill/stroke inheritance mentioned by the spec.
1880 */
1881 sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration,
1882 parent->text_decoration);
1884 //nyi: font-size-adjust, // <number> | none | inherit
1885 //nyi: glyph-orientation-horizontal,
1886 //nyi: glyph-orientation-vertical,
1887 }
1889 /* Properties that involve length but are easy in other respects. */
1890 {
1891 /* The difficulty with lengths is that font-relative units need adjusting if the font
1892 * varies between parent & child.
1893 *
1894 * Lengths specified in the existing child can stay as they are: its computed font
1895 * specification should stay unchanged, so em & ex lengths should continue to mean the same
1896 * size.
1897 *
1898 * Lengths specified in the dying parent in em or ex need to be scaled according to the
1899 * ratio of em or ex size between parent & child.
1900 */
1901 double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed;
1903 SPILength SPStyle::*const lfields[] = {
1904 &SPStyle::stroke_width,
1905 &SPStyle::text_indent
1906 };
1907 for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) {
1908 SPILength SPStyle::*fld = lfields[i];
1909 sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld,
1910 parent->*fld,
1911 parent_child_em_ratio);
1912 }
1914 SPILengthOrNormal SPStyle::*const nfields[] = {
1915 &SPStyle::letter_spacing,
1916 &SPStyle::line_height,
1917 &SPStyle::word_spacing
1918 };
1919 for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) {
1920 SPILengthOrNormal SPStyle::*fld = nfields[i];
1921 sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld,
1922 parent->*fld,
1923 parent_child_em_ratio);
1924 }
1926 //nyi: &SPStyle::kerning: length or `auto'
1928 /* fixme: Move stroke-dash and stroke-dash-offset here once they
1929 can accept units. */
1930 }
1932 /* Properties that involve a URI but are easy in other respects. */
1933 {
1934 /** \todo
1935 * Could cause problems if original object was in another document
1936 * and it used a relative URL. (At the time of writing, we don't
1937 * allow hrefs to other documents, so this isn't a problem yet.)
1938 * Paint properties also allow URIs.
1939 */
1940 //nyi: cursor, // may involve change in effect, but we can't do much better
1941 //nyi: color-profile,
1943 // Markers (marker-start, marker-mid, marker-end).
1944 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1945 sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]);
1946 }
1947 }
1949 /* CSS2 */
1950 /* Font */
1952 if (style->text && parent->text) {
1953 sp_style_merge_string_prop_from_dying_parent(style->text->font_specification,
1954 parent->text->font_specification);
1956 sp_style_merge_string_prop_from_dying_parent(style->text->font_family,
1957 parent->text->font_family);
1958 }
1961 /* Properties that don't inherit by default. Most of these need special handling. */
1962 {
1963 /*
1964 * opacity's effect is cumulative; we set the new value to the combined effect. The
1965 * default value for opacity is 1.0, not inherit. (Note that stroke-opacity and
1966 * fill-opacity are quite different from opacity, and don't need any special handling.)
1967 *
1968 * Cases:
1969 * - parent & child were each previously unset, in which case the effective
1970 * opacity value is 1.0, and style should remain unset.
1971 * - parent was previously unset (so computed opacity value of 1.0)
1972 * and child was set to inherit. The merged child should
1973 * get a value of 1.0, and shouldn't inherit (lest the new parent
1974 * has a different opacity value). Given that opacity's default
1975 * value is 1.0 (rather than inherit), we might as well have the
1976 * merged child's opacity be unset.
1977 * - parent was previously unset (so opacity 1.0), and child was set to a number.
1978 * The merged child should retain its existing settings (though it doesn't matter
1979 * if we make it unset if that number was 1.0).
1980 * - parent was inherit and child was unset. Merged child should be set to inherit.
1981 * - parent was inherit and child was inherit. (We can't in general reproduce this
1982 * effect (short of introducing a new group), but setting opacity to inherit is rare.)
1983 * If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged
1984 * child's value should be set to the product of the two, i.e. the square of the
1985 * inherited value, and should not be marked as inherit. (This decision assumes that it
1986 * is more important to retain the effective opacity than to retain the inheriting
1987 * effect, and assumes that the inheriting effect either isn't important enough to create
1988 * a group or isn't common enough to bother maintaining the code to create a group.) If
1989 * the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes
1990 * closer to maintaining the effect.
1991 * - parent was inherit and child was set to a numerical value. If the child's value
1992 * was 1.0, then the merged child should have the same settings as the parent.
1993 * If the child's value was 0, then the merged child should also be set to 0.
1994 * If the child's value was anything else, then we do the same as for the inherit/inherit
1995 * case above: have the merged child set to the product of the two opacities and not
1996 * marked as inherit, for the same reasons as for that case.
1997 * - parent was set to a value, and child was unset. The merged child should have
1998 * parent's settings.
1999 * - parent was set to a value, and child was inherit. The merged child should
2000 * be set to the product, i.e. the square of the parent's value.
2001 * - parent & child are each set to a value. The merged child should be set to the
2002 * product.
2003 */
2004 if ( !style->opacity.set
2005 || ( !style->opacity.inherit
2006 && style->opacity.value == SP_SCALE24_MAX ) )
2007 {
2008 style->opacity = parent->opacity;
2009 } else {
2010 /* Ensure that style's computed value is up-to-date. */
2011 if (style->opacity.inherit) {
2012 style->opacity.value = parent->opacity.value;
2013 }
2015 /* Multiplication of opacities occurs even if a child's opacity is set to inherit. */
2016 style->opacity.value = SP_SCALE24_MUL(style->opacity.value,
2017 parent->opacity.value);
2019 style->opacity.inherit = (parent->opacity.inherit
2020 && style->opacity.inherit
2021 && (parent->opacity.value == 0 ||
2022 parent->opacity.value == SP_SCALE24_MAX));
2023 style->opacity.set = ( style->opacity.inherit
2024 || style->opacity.value < SP_SCALE24_MAX );
2025 }
2027 /* display is in principle similar to opacity, but implementation is easier. */
2028 if ( parent->display.set && !parent->display.inherit
2029 && parent->display.value == SP_CSS_DISPLAY_NONE ) {
2030 style->display.value = SP_CSS_DISPLAY_NONE;
2031 style->display.set = true;
2032 style->display.inherit = false;
2033 } else if (style->display.inherit) {
2034 style->display.value = parent->display.value;
2035 style->display.set = parent->display.set;
2036 style->display.inherit = parent->display.inherit;
2037 } else {
2038 /* Leave as is. (display doesn't inherit by default.) */
2039 }
2041 /* enable-background - this is rather complicated, because
2042 * it is valid only when applied to container elements.
2043 * Let's check a simple case anyhow. */
2044 if (parent->enable_background.set
2045 && !parent->enable_background.inherit
2046 && style->enable_background.inherit)
2047 {
2048 style->enable_background.set = true;
2049 style->enable_background.inherit = false;
2050 style->enable_background.value = parent->enable_background.value;
2051 }
2053 if (!style->filter.set || style->filter.inherit)
2054 {
2055 sp_style_merge_ifilter(style, &parent->filter);
2056 }
2058 /** \todo
2059 * fixme: Check that we correctly handle all properties that don't
2060 * inherit by default (as shown in
2061 * http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties).
2062 */
2063 }
2065 /* SPIPaint properties (including color). */
2066 {
2067 /** \todo
2068 * Think about the issues involved if specified as currentColor or
2069 * if specified relative to colorProfile, and if the currentColor or
2070 * colorProfile differs between parent \& child. See also comments
2071 * elsewhere in this function about URIs.
2072 */
2073 SPIPaint SPStyle::*const fields[] = {
2074 &SPStyle::color,
2075 &SPStyle::fill,
2076 &SPStyle::stroke
2077 };
2078 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
2079 SPIPaint SPStyle::*const fld = fields[i];
2080 sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld);
2081 }
2082 }
2084 /* Things from SVG 1.2 or CSS3. */
2085 {
2086 /* Note: If we ever support setting string values for text-align then we'd need strdup
2087 * handling here. */
2088 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align);
2090 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform);
2091 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression);
2092 }
2094 /* Note: this will need length handling once dasharray supports units. */
2095 if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit )
2096 && parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit )
2097 {
2098 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
2099 if (style->stroke_dash.n_dash > 0) {
2100 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
2101 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
2102 }
2103 style->stroke_dasharray_set = parent->stroke_dasharray_set;
2104 style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit;
2105 }
2107 /* Note: this will need length handling once dasharray_offset supports units. */
2108 if ((!style->stroke_dashoffset_set || style->stroke_dashoffset_inherit) && parent->stroke_dashoffset_set && !parent->stroke_dashoffset_inherit) {
2109 style->stroke_dash.offset = parent->stroke_dash.offset;
2110 style->stroke_dashoffset_set = parent->stroke_dashoffset_set;
2111 style->stroke_dashoffset_inherit = parent->stroke_dashoffset_inherit;
2112 /* TODO: Try to
2113 * represent it as a normal SPILength; though will need to do something about existing
2114 * users of stroke_dash.offset and stroke_dashoffset_set. */
2115 }
2116 }
2119 static void
2120 sp_style_set_ipaint_to_uri(SPStyle *style, SPIPaint *paint, const Inkscape::URI *uri, SPDocument *document)
2121 {
2122 // it may be that this style's SPIPaint has not yet created its URIReference;
2123 // now that we have a document, we can create it here
2124 if (!paint->value.href && document) {
2125 paint->value.href = new SPPaintServerReference(document);
2126 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));
2127 }
2129 if (paint->value.href && paint->value.href->getObject())
2130 paint->value.href->detach();
2132 if (paint->value.href) {
2133 try {
2134 paint->value.href->attach(*uri);
2135 } catch (Inkscape::BadURIException &e) {
2136 g_warning("%s", e.what());
2137 paint->value.href->detach();
2138 }
2139 }
2140 }
2142 static void
2143 sp_style_set_ipaint_to_uri_string (SPStyle *style, SPIPaint *paint, const gchar *uri)
2144 {
2145 try {
2146 const Inkscape::URI IURI(uri);
2147 sp_style_set_ipaint_to_uri(style, paint, &IURI, style->document);
2148 } catch (...) {
2149 g_warning("URI failed to parse: %s", uri);
2150 }
2151 }
2153 void
2154 sp_style_set_to_uri_string (SPStyle *style, bool isfill, const gchar *uri)
2155 {
2156 sp_style_set_ipaint_to_uri_string (style, isfill? &style->fill : &style->stroke, uri);
2157 }
2159 /**
2160 *
2161 */
2162 static void
2163 sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
2164 {
2165 if ((paint->set && paint->currentcolor) || parent->currentcolor) {
2166 bool isset = paint->set;
2167 paint->clear();
2168 paint->set = isset;
2169 paint->currentcolor = TRUE;
2170 paint->setColor(style->color.value.color);
2171 return;
2172 }
2174 paint->clear();
2175 if ( parent->isPaintserver() ) {
2176 if (parent->value.href) {
2177 sp_style_set_ipaint_to_uri(style, paint, parent->value.href->getURI(), parent->value.href->getOwnerDocument());
2178 } else {
2179 g_warning("Expected paint server not found.");
2180 }
2181 } else if ( parent->isColor() ) {
2182 paint->setColor( parent->value.color );
2183 } else if ( parent->isNoneSet() ) {
2184 paint->noneSet = TRUE;
2185 } else if ( parent->isNone() ) {
2186 //
2187 } else {
2188 g_assert_not_reached();
2189 }
2190 }
2193 /**
2194 * Merge filter style from parent.
2195 * Filter effects do not inherit by default
2196 */
2197 static void
2198 sp_style_merge_ifilter(SPStyle *style, SPIFilter const *parent)
2199 {
2200 // FIXME:
2201 // instead of just copying over, we need to _really merge_ the two filters by combining their
2202 // filter primitives
2204 sp_style_filter_clear(style);
2205 style->filter.set = parent->set;
2206 style->filter.inherit = parent->inherit;
2208 if (style->filter.href && style->filter.href->getObject())
2209 style->filter.href->detach();
2211 // it may be that this style has not yet created its SPFilterReference
2212 if (!style->filter.href && style->object && SP_OBJECT_DOCUMENT(style->object)) {
2213 style->filter.href = new SPFilterReference(SP_OBJECT_DOCUMENT(style->object));
2214 style->filter.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_filter_ref_changed), style));
2215 }
2217 if (style->filter.href && parent->href && parent->href->getObject()) {
2218 try {
2219 style->filter.href->attach(*parent->href->getURI());
2220 } catch (Inkscape::BadURIException &e) {
2221 g_warning("%s", e.what());
2222 style->filter.href->detach();
2223 }
2224 }
2225 }
2227 /**
2228 * Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or
2229 * SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's
2230 * complete cascaded style to style_clipboard. When you need a CSS string
2231 * for an object in the document tree, you normally call
2232 * sp_style_write_difference instead to take into account the object's parent.
2233 *
2234 * \pre style != NULL.
2235 * \pre flags in {IFSET, ALWAYS}.
2236 * \post ret != NULL.
2237 */
2238 gchar *
2239 sp_style_write_string(SPStyle const *const style, guint const flags)
2240 {
2241 /** \todo
2242 * Merge with write_difference, much duplicate code!
2243 */
2244 g_return_val_if_fail(style != NULL, NULL);
2245 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
2246 (flags == SP_STYLE_FLAG_ALWAYS) ),
2247 NULL);
2249 gchar c[BMAX];
2250 gchar *p = c;
2251 *p = '\0';
2253 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags);
2254 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags);
2255 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags);
2256 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags);
2257 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags);
2259 /* Text */
2260 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags);
2261 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags);
2262 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags);
2263 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags);
2264 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags);
2265 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags);
2266 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags);
2267 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags);
2268 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags);
2269 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags);
2271 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags);
2273 /// \todo fixme: Per type methods need default flag too (lauris)
2275 if (style->opacity.value != SP_SCALE24_MAX) {
2276 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags);
2277 }
2279 if (!style->color.noneSet) { // CSS does not permit "none" for color
2280 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags);
2281 }
2283 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags);
2284 // if fill:none, skip writing fill properties
2285 if (!style->fill.noneSet) {
2286 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags);
2287 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags);
2288 }
2290 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags);
2292 // stroke width affects markers, so write it if there's stroke OR any markers
2293 if (!style->stroke.noneSet ||
2294 style->marker[SP_MARKER_LOC].set ||
2295 style->marker[SP_MARKER_LOC_START].set ||
2296 style->marker[SP_MARKER_LOC_MID].set ||
2297 style->marker[SP_MARKER_LOC_END].set) {
2298 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags);
2299 }
2301 // if stroke:none, skip writing stroke properties
2302 if (!style->stroke.noneSet) {
2303 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags);
2304 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags);
2305 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags);
2306 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags);
2308 /** \todo fixme: */
2309 if ((flags == SP_STYLE_FLAG_ALWAYS)
2310 || style->stroke_dasharray_set)
2311 {
2312 if (style->stroke_dasharray_inherit) {
2313 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2314 } else if (style->stroke_dash.n_dash && style->stroke_dash.dash) {
2315 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2316 gint i;
2317 for (i = 0; i < style->stroke_dash.n_dash; i++) {
2318 Inkscape::CSSOStringStream os;
2319 if (i) {
2320 os << ", ";
2321 }
2322 os << style->stroke_dash.dash[i];
2323 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2324 }
2325 if (p < c + BMAX) {
2326 *p++ = ';';
2327 }
2328 } else {
2329 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;");
2330 }
2331 }
2333 /** \todo fixme: */
2334 if (style->stroke_dashoffset_set) {
2335 if (style->stroke_dashoffset_inherit) {
2336 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:inherit;");
2337 } else {
2338 Inkscape::CSSOStringStream os;
2339 os << "stroke-dashoffset:" << style->stroke_dash.offset << ";";
2340 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2341 }
2342 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2343 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;");
2344 }
2345 }
2347 bool marker_none = false;
2348 gchar *master = style->marker[SP_MARKER_LOC].value;
2349 if (style->marker[SP_MARKER_LOC].set) {
2350 p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value);
2351 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2352 p += g_snprintf(p, c + BMAX - p, "marker:none;");
2353 marker_none = true;
2354 }
2355 if (style->marker[SP_MARKER_LOC_START].set
2356 && (!master || strcmp(master, style->marker[SP_MARKER_LOC_START].value))) {
2357 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value);
2358 } else if (flags == SP_STYLE_FLAG_ALWAYS && !marker_none) {
2359 p += g_snprintf(p, c + BMAX - p, "marker-start:none;");
2360 }
2361 if (style->marker[SP_MARKER_LOC_MID].set
2362 && (!master || strcmp(master, style->marker[SP_MARKER_LOC_MID].value))) {
2363 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value);
2364 } else if (flags == SP_STYLE_FLAG_ALWAYS && !marker_none) {
2365 p += g_snprintf(p, c + BMAX - p, "marker-mid:none;");
2366 }
2367 if (style->marker[SP_MARKER_LOC_END].set
2368 && (!master || strcmp(master, style->marker[SP_MARKER_LOC_END].value))) {
2369 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value);
2370 } else if (flags == SP_STYLE_FLAG_ALWAYS && !marker_none) {
2371 p += g_snprintf(p, c + BMAX - p, "marker-end:none;");
2372 }
2374 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags);
2375 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags);
2376 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags);
2378 /* filter: */
2379 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &style->filter, NULL, flags);
2381 p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &style->enable_background, NULL, flags);
2383 /* fixme: */
2384 p += sp_text_style_write(p, c + BMAX - p, style->text, flags);
2386 /* Get rid of trailing `;'. */
2387 if (p != c) {
2388 --p;
2389 if (*p == ';') {
2390 *p = '\0';
2391 }
2392 }
2394 return g_strdup(c);
2395 }
2398 #define STYLE_BUF_MAX
2401 /**
2402 * Dumps style to CSS string, see sp_style_write_string()
2403 *
2404 * \pre from != NULL.
2405 * \pre to != NULL.
2406 * \post ret != NULL.
2407 */
2408 gchar *
2409 sp_style_write_difference(SPStyle const *const from, SPStyle const *const to)
2410 {
2411 g_return_val_if_fail(from != NULL, NULL);
2412 g_return_val_if_fail(to != NULL, NULL);
2414 gchar c[BMAX], *p = c;
2415 *p = '\0';
2417 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF);
2418 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF);
2419 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF);
2420 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF);
2421 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF);
2423 /* Text */
2424 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF);
2425 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF);
2426 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF);
2427 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF);
2428 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF);
2429 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF);
2430 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF);
2431 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF);
2432 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF);
2433 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF);
2435 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF);
2437 /// \todo fixme: Per type methods need default flag too
2438 if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) {
2439 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET);
2440 }
2442 if (!from->color.noneSet) { // CSS does not permit "none" for color
2443 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET);
2444 }
2446 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF);
2447 // if fill:none, skip writing fill properties
2448 if (!from->fill.noneSet) {
2449 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF);
2450 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF);
2451 }
2453 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF);
2455 // stroke width affects markers, so write it if there's stroke OR any markers
2456 if (!from->stroke.noneSet ||
2457 from->marker[SP_MARKER_LOC].set ||
2458 from->marker[SP_MARKER_LOC_START].set ||
2459 from->marker[SP_MARKER_LOC_MID].set ||
2460 from->marker[SP_MARKER_LOC_END].set) {
2461 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF);
2462 }
2464 // if stroke:none, skip writing stroke properties
2465 if (!from->stroke.noneSet) {
2466 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap,
2467 &from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF);
2468 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin,
2469 &from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF);
2470 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit",
2471 &from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF);
2472 /** \todo fixme: */
2473 if (from->stroke_dasharray_set) {
2474 if (from->stroke_dasharray_inherit) {
2475 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2476 } else if (from->stroke_dash.n_dash && from->stroke_dash.dash) {
2477 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2478 for (gint i = 0; i < from->stroke_dash.n_dash; i++) {
2479 Inkscape::CSSOStringStream os;
2480 if (i) {
2481 os << ", ";
2482 }
2483 os << from->stroke_dash.dash[i];
2484 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2485 }
2486 p += g_snprintf(p, c + BMAX - p, ";");
2487 }
2488 }
2489 /* fixme: */
2490 if (from->stroke_dashoffset_set) {
2491 if (from->stroke_dashoffset_inherit) {
2492 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:inherit;");
2493 } else {
2494 Inkscape::CSSOStringStream os;
2495 os << "stroke-dashoffset:" << from->stroke_dash.offset << ";";
2496 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2497 }
2498 }
2499 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF);
2500 }
2502 /* markers */
2503 gchar *master = from->marker[SP_MARKER_LOC].value;
2504 if (master != NULL) {
2505 p += g_snprintf(p, c + BMAX - p, "marker:%s;", master);
2506 }
2507 if (from->marker[SP_MARKER_LOC_START].value != NULL && (!master || strcmp(master, from->marker[SP_MARKER_LOC_START].value))) {
2508 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value);
2509 }
2510 if (from->marker[SP_MARKER_LOC_MID].value != NULL && (!master || strcmp(master, from->marker[SP_MARKER_LOC_MID].value))) {
2511 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value);
2512 }
2513 if (from->marker[SP_MARKER_LOC_END].value != NULL && (!master || strcmp(master, from->marker[SP_MARKER_LOC_END].value))) {
2514 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value);
2515 }
2517 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET);
2518 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET);
2519 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET);
2521 /* filter: */
2522 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &from->filter, &to->filter, SP_STYLE_FLAG_IFDIFF);
2524 p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &from->enable_background, &to->enable_background, SP_STYLE_FLAG_IFSET);
2526 p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF);
2528 /** \todo
2529 * The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF
2530 * flag is mainly only for attributes that don't handle explicit unset well.
2531 * We may need to revisit the behaviour of this routine.
2532 */
2534 /* Get rid of trailing `;'. */
2535 if (p != c) {
2536 --p;
2537 if (*p == ';') {
2538 *p = '\0';
2539 }
2540 }
2542 return g_strdup(c);
2543 }
2547 /**
2548 * Reset all style properties.
2549 */
2550 static void
2551 sp_style_clear(SPStyle *style)
2552 {
2553 g_return_if_fail(style != NULL);
2555 style->fill.clear();
2556 style->stroke.clear();
2557 sp_style_filter_clear(style);
2559 if (style->fill.value.href) {
2560 delete style->fill.value.href;
2561 style->fill.value.href = NULL;
2562 }
2563 if (style->stroke.value.href) {
2564 delete style->stroke.value.href;
2565 style->stroke.value.href = NULL;
2566 }
2567 if (style->filter.href) {
2568 delete style->filter.href;
2569 style->filter.href = NULL;
2570 }
2572 if (style->stroke_dash.dash) {
2573 g_free(style->stroke_dash.dash);
2574 }
2576 style->stroke_dasharray_inherit = FALSE;
2577 style->stroke_dashoffset_inherit = FALSE;
2579 /** \todo fixme: Do that text manipulation via parents */
2580 SPObject *object = style->object;
2581 SPDocument *document = style->document;
2582 gint const refcount = style->refcount;
2583 SPTextStyle *text = style->text;
2584 unsigned const text_private = style->text_private;
2586 memset(style, 0, sizeof(SPStyle));
2588 style->refcount = refcount;
2589 style->object = object;
2590 style->document = document;
2592 if (document) {
2593 style->filter.href = new SPFilterReference(document);
2594 style->filter.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_filter_ref_changed), style));
2596 style->fill.value.href = new SPPaintServerReference(document);
2597 style->fill.value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_fill_paint_server_ref_changed), style));
2599 style->stroke.value.href = new SPPaintServerReference(document);
2600 style->stroke.value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_stroke_paint_server_ref_changed), style));
2601 }
2603 style->text = text;
2604 style->text_private = text_private;
2606 style->text->font_specification.set = FALSE;
2607 style->text->font.set = FALSE;
2608 style->text->font_family.set = FALSE;
2610 style->font_size.set = FALSE;
2611 style->font_size.type = SP_FONT_SIZE_LITERAL;
2612 style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM;
2613 style->font_size.computed = 12.0;
2614 style->font_style.set = FALSE;
2615 style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL;
2616 style->font_variant.set = FALSE;
2617 style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL;
2618 style->font_weight.set = FALSE;
2619 style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL;
2620 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
2621 style->font_stretch.set = FALSE;
2622 style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL;
2624 /* text */
2625 style->text_indent.set = FALSE;
2626 style->text_indent.unit = SP_CSS_UNIT_NONE;
2627 style->text_indent.computed = 0.0;
2629 style->text_align.set = FALSE;
2630 style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START;
2632 style->text_decoration.set = FALSE;
2633 style->text_decoration.underline = FALSE;
2634 style->text_decoration.overline = FALSE;
2635 style->text_decoration.line_through = FALSE;
2636 style->text_decoration.blink = FALSE;
2638 style->line_height.set = FALSE;
2639 style->line_height.unit = SP_CSS_UNIT_PERCENT;
2640 style->line_height.normal = TRUE;
2641 style->line_height.value = style->line_height.computed = 1.0;
2643 style->letter_spacing.set = FALSE;
2644 style->letter_spacing.unit = SP_CSS_UNIT_NONE;
2645 style->letter_spacing.normal = TRUE;
2646 style->letter_spacing.value = style->letter_spacing.computed = 0.0;
2648 style->word_spacing.set = FALSE;
2649 style->word_spacing.unit = SP_CSS_UNIT_NONE;
2650 style->word_spacing.normal = TRUE;
2651 style->word_spacing.value = style->word_spacing.computed = 0.0;
2653 style->text_transform.set = FALSE;
2654 style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE;
2656 style->direction.set = FALSE;
2657 style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR;
2659 style->block_progression.set = FALSE;
2660 style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB;
2662 style->writing_mode.set = FALSE;
2663 style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB;
2666 style->text_anchor.set = FALSE;
2667 style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START;
2670 style->opacity.value = SP_SCALE24_MAX;
2671 style->visibility.set = FALSE;
2672 style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE;
2673 style->display.set = FALSE;
2674 style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE;
2675 style->overflow.set = FALSE;
2676 style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE;
2678 style->color.clear();
2679 style->color.setColor(0.0, 0.0, 0.0);
2681 style->fill.clear();
2682 style->fill.setColor(0.0, 0.0, 0.0);
2683 style->fill_opacity.value = SP_SCALE24_MAX;
2684 style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO;
2686 style->stroke.clear();
2687 style->stroke_opacity.value = SP_SCALE24_MAX;
2689 style->stroke_width.set = FALSE;
2690 style->stroke_width.unit = SP_CSS_UNIT_NONE;
2691 style->stroke_width.computed = 1.0;
2693 style->stroke_linecap.set = FALSE;
2694 style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT;
2695 style->stroke_linejoin.set = FALSE;
2696 style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER;
2698 style->stroke_miterlimit.set = FALSE;
2699 style->stroke_miterlimit.value = 4.0;
2701 style->stroke_dash.n_dash = 0;
2702 style->stroke_dash.dash = NULL;
2703 style->stroke_dash.offset = 0.0;
2705 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
2706 g_free(style->marker[i].value);
2707 style->marker[i].set = FALSE;
2708 }
2710 style->enable_background.value = SP_CSS_BACKGROUND_ACCUMULATE;
2711 style->enable_background.set = false;
2712 style->enable_background.inherit = false;
2713 }
2717 /**
2718 *
2719 */
2720 static void
2721 sp_style_read_dash(SPStyle *style, gchar const *str)
2722 {
2723 /* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */
2724 style->stroke_dasharray_set = TRUE;
2726 if (strcmp(str, "inherit") == 0) {
2727 style->stroke_dasharray_inherit = true;
2728 return;
2729 }
2730 style->stroke_dasharray_inherit = false;
2732 NRVpathDash &dash = style->stroke_dash;
2733 g_free(dash.dash);
2734 dash.dash = NULL;
2736 if (strcmp(str, "none") == 0) {
2737 dash.n_dash = 0;
2738 return;
2739 }
2741 gint n_dash = 0;
2742 gdouble d[64];
2743 gchar *e = NULL;
2745 bool LineSolid=true;
2746 while (e != str && n_dash < 64) {
2747 /* TODO: Should allow <length> rather than just a unitless (px) number. */
2748 d[n_dash] = g_ascii_strtod(str, (char **) &e);
2749 if (d[n_dash] > 0.00000001)
2750 LineSolid = false;
2751 if (e != str) {
2752 n_dash += 1;
2753 str = e;
2754 }
2755 while (str && *str && !isalnum(*str)) str += 1;
2756 }
2758 if (LineSolid) {
2759 dash.n_dash = 0;
2760 return;
2761 }
2763 if (n_dash > 0) {
2764 dash.dash = g_new(gdouble, n_dash);
2765 memcpy(dash.dash, d, sizeof(gdouble) * n_dash);
2766 dash.n_dash = n_dash;
2767 }
2768 }
2771 /*#########################
2772 ## SPTextStyle operations
2773 #########################*/
2776 /**
2777 * Return new SPTextStyle object with default settings.
2778 */
2779 static SPTextStyle *
2780 sp_text_style_new()
2781 {
2782 SPTextStyle *ts = g_new0(SPTextStyle, 1);
2783 ts->refcount = 1;
2784 sp_text_style_clear(ts);
2786 ts->font_specification.value = g_strdup("Sans");
2787 ts->font.value = g_strdup("Sans");
2788 ts->font_family.value = g_strdup("Sans");
2790 return ts;
2791 }
2794 /**
2795 * Clear text style settings.
2796 */
2797 static void
2798 sp_text_style_clear(SPTextStyle *ts)
2799 {
2800 ts->font_specification.set = FALSE;
2801 ts->font.set = FALSE;
2802 ts->font_family.set = FALSE;
2803 }
2807 /**
2808 * Reduce refcount of text style and possibly free it.
2809 */
2810 static SPTextStyle *
2811 sp_text_style_unref(SPTextStyle *st)
2812 {
2813 st->refcount -= 1;
2815 if (st->refcount < 1) {
2816 g_free(st->font_specification.value);
2817 g_free(st->font.value);
2818 g_free(st->font_family.value);
2819 g_free(st);
2820 }
2822 return NULL;
2823 }
2827 /**
2828 * Return duplicate of text style.
2829 */
2830 static SPTextStyle *
2831 sp_text_style_duplicate_unset(SPTextStyle *st)
2832 {
2833 SPTextStyle *nt = g_new0(SPTextStyle, 1);
2834 nt->refcount = 1;
2836 nt->font_specification.value = g_strdup(st->font_specification.value);
2837 nt->font.value = g_strdup(st->font.value);
2838 nt->font_family.value = g_strdup(st->font_family.value);
2840 return nt;
2841 }
2845 /**
2846 * Write SPTextStyle object into string.
2847 */
2848 static guint
2849 sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags)
2850 {
2851 gint d = 0;
2853 // We do not do diffing for text style
2854 if (flags == SP_STYLE_FLAG_IFDIFF)
2855 flags = SP_STYLE_FLAG_IFSET;
2857 d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags);
2858 d += sp_style_write_istring(p + d, len - d, "-inkscape-font-specification", &st->font_specification, NULL, flags);
2859 return d;
2860 }
2864 /* The following sp_tyle_read_* functions ignore invalid values, as per
2865 * http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors.
2866 *
2867 * [However, the SVG spec is somewhat unclear as to whether the style attribute should
2868 * be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE
2869 * pairs, in which case SVG's error-handling rules
2870 * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.]
2871 */
2874 /**
2875 * Set SPIFloat object from string.
2876 */
2877 static void
2878 sp_style_read_ifloat(SPIFloat *val, gchar const *str)
2879 {
2880 if (!strcmp(str, "inherit")) {
2881 val->set = TRUE;
2882 val->inherit = TRUE;
2883 } else {
2884 gfloat value;
2885 if (sp_svg_number_read_f(str, &value)) {
2886 val->set = TRUE;
2887 val->inherit = FALSE;
2888 val->value = value;
2889 }
2890 }
2891 }
2895 /**
2896 * Set SPIScale24 object from string.
2897 */
2898 static void
2899 sp_style_read_iscale24(SPIScale24 *val, gchar const *str)
2900 {
2901 if (!strcmp(str, "inherit")) {
2902 val->set = TRUE;
2903 val->inherit = TRUE;
2904 } else {
2905 gfloat value;
2906 if (sp_svg_number_read_f(str, &value)) {
2907 val->set = TRUE;
2908 val->inherit = FALSE;
2909 value = CLAMP(value, 0.0, 1.0);
2910 val->value = SP_SCALE24_FROM_FLOAT(value);
2911 }
2912 }
2913 }
2915 /**
2916 * Reads a style value and performs lookup based on the given style value enumerations.
2917 */
2918 static void
2919 sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict,
2920 bool const can_explicitly_inherit)
2921 {
2922 if ( can_explicitly_inherit && !strcmp(str, "inherit") ) {
2923 val->set = TRUE;
2924 val->inherit = TRUE;
2925 } else {
2926 for (unsigned i = 0; dict[i].key; i++) {
2927 if (!strcmp(str, dict[i].key)) {
2928 val->set = TRUE;
2929 val->inherit = FALSE;
2930 val->value = dict[i].value;
2931 /* Save copying for values not needing it */
2932 val->computed = val->value;
2933 break;
2934 }
2935 }
2936 }
2937 }
2941 /**
2942 * Set SPIString object from string.
2943 */
2944 static void
2945 sp_style_read_istring(SPIString *val, gchar const *str)
2946 {
2947 g_free(val->value);
2949 if (!strcmp(str, "inherit")) {
2950 val->set = TRUE;
2951 val->inherit = TRUE;
2952 val->value = NULL;
2953 } else {
2954 val->set = TRUE;
2955 val->inherit = FALSE;
2956 val->value = g_strdup(str);
2957 }
2958 }
2962 /**
2963 * Set SPILength object from string.
2964 */
2965 static void
2966 sp_style_read_ilength(SPILength *val, gchar const *str)
2967 {
2968 if (!strcmp(str, "inherit")) {
2969 val->set = TRUE;
2970 val->inherit = TRUE;
2971 } else {
2972 gdouble value;
2973 gchar *e;
2974 /** \todo fixme: Move this to standard place (Lauris) */
2975 value = g_ascii_strtod(str, &e);
2976 if ((gchar const *) e != str) {
2977 /** \todo
2978 * Allow the number of px per inch to vary (document preferences,
2979 * X server or whatever). E.g. don't fill in computed here, do
2980 * it at the same time as percentage units are done.
2981 */
2982 if (!*e) {
2983 /* Userspace */
2984 val->unit = SP_CSS_UNIT_NONE;
2985 val->computed = value;
2986 } else if (!strcmp(e, "px")) {
2987 /* Userspace */
2988 val->unit = SP_CSS_UNIT_PX;
2989 val->computed = value;
2990 } else if (!strcmp(e, "pt")) {
2991 /* Userspace / DEVICESCALE */
2992 val->unit = SP_CSS_UNIT_PT;
2993 val->computed = value * PX_PER_PT;
2994 } else if (!strcmp(e, "pc")) {
2995 /* 1 pica = 12pt; FIXME: add it to SPUnit */
2996 val->unit = SP_CSS_UNIT_PC;
2997 val->computed = value * PX_PER_PT * 12;
2998 } else if (!strcmp(e, "mm")) {
2999 val->unit = SP_CSS_UNIT_MM;
3000 val->computed = value * PX_PER_MM;
3001 } else if (!strcmp(e, "cm")) {
3002 val->unit = SP_CSS_UNIT_CM;
3003 val->computed = value * PX_PER_CM;
3004 } else if (!strcmp(e, "in")) {
3005 val->unit = SP_CSS_UNIT_IN;
3006 val->computed = value * PX_PER_IN;
3007 } else if (!strcmp(e, "em")) {
3008 /* EM square */
3009 val->unit = SP_CSS_UNIT_EM;
3010 val->value = value;
3011 } else if (!strcmp(e, "ex")) {
3012 /* ex square */
3013 val->unit = SP_CSS_UNIT_EX;
3014 val->value = value;
3015 } else if (!strcmp(e, "%")) {
3016 /* Percentage */
3017 val->unit = SP_CSS_UNIT_PERCENT;
3018 val->value = value * 0.01;
3019 } else {
3020 /* Invalid */
3021 return;
3022 }
3023 val->set = TRUE;
3024 val->inherit = FALSE;
3025 }
3026 }
3027 }
3029 /**
3030 * Set SPILengthOrNormal object from string.
3031 */
3032 static void
3033 sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str)
3034 {
3035 if (!strcmp(str, "normal")) {
3036 val->set = TRUE;
3037 val->inherit = FALSE;
3038 val->normal = TRUE;
3039 val->unit = SP_CSS_UNIT_NONE;
3040 val->value = val->computed = 0.0;
3041 } else {
3042 SPILength length;
3043 sp_style_read_ilength(&length, str);
3044 val->set = length.set;
3045 val->inherit = length.inherit;
3046 val->normal = FALSE;
3047 val->unit = length.unit;
3048 val->value = length.value;
3049 val->computed = length.computed;
3050 }
3051 }
3053 /**
3054 * Set SPITextDecoration object from string.
3055 */
3056 static void
3057 sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str)
3058 {
3059 if (!strcmp(str, "inherit")) {
3060 val->set = TRUE;
3061 val->inherit = TRUE;
3062 } else if (!strcmp(str, "none")) {
3063 val->set = TRUE;
3064 val->inherit = FALSE;
3065 val->underline = FALSE;
3066 val->overline = FALSE;
3067 val->line_through = FALSE;
3068 val->blink = FALSE;
3069 } else {
3070 bool found_underline = false;
3071 bool found_overline = false;
3072 bool found_line_through = false;
3073 bool found_blink = false;
3074 for ( ; *str ; str++ ) {
3075 if (*str == ' ') continue;
3076 if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) {
3077 found_underline = true;
3078 str += 9;
3079 } else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) {
3080 found_overline = true;
3081 str += 8;
3082 } else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) {
3083 found_line_through = true;
3084 str += 12;
3085 } else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) {
3086 found_blink = true;
3087 str += 5;
3088 } else {
3089 return; // invalid value
3090 }
3091 }
3092 if (!(found_underline || found_overline || found_line_through || found_blink)) {
3093 return; // invalid value: empty
3094 }
3095 val->set = TRUE;
3096 val->inherit = FALSE;
3097 val->underline = found_underline;
3098 val->overline = found_overline;
3099 val->line_through = found_line_through;
3100 val->blink = found_blink;
3101 }
3102 }
3104 /**
3105 * Set SPIPaint object from string containing an integer value.
3106 * \param document Ignored
3107 */
3108 static void
3109 sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
3110 {
3111 (void)style; // TODO
3112 (void)document; // TODO
3113 paint->currentcolor = FALSE; /* currentColor not a valid <color>. */
3114 if (!strcmp(str, "inherit")) {
3115 paint->set = TRUE;
3116 paint->inherit = TRUE;
3117 } else {
3118 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
3119 if (rgb0 != 0xff) {
3120 paint->setColor(rgb0);
3121 paint->set = TRUE;
3122 paint->inherit = FALSE;
3123 }
3124 }
3125 }
3128 /**
3129 * Set SPIPaint object from string.
3130 *
3131 * \pre paint == \&style.fill || paint == \&style.stroke.
3132 */
3133 static void
3134 sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
3135 {
3136 while (g_ascii_isspace(*str)) {
3137 ++str;
3138 }
3140 paint->clear();
3142 if (streq(str, "inherit")) {
3143 paint->set = TRUE;
3144 paint->inherit = TRUE;
3145 } else {
3146 if ( strneq(str, "url", 3) ) {
3147 gchar *uri = extract_uri( str, &str );
3148 while ( g_ascii_isspace(*str) ) {
3149 ++str;
3150 }
3151 // TODO check on and comment the comparrison "paint != &style->color".
3152 if ( uri && *uri && (paint != &style->color) ) {
3153 paint->set = TRUE;
3155 // it may be that this style's SPIPaint has not yet created its URIReference;
3156 // now that we have a document, we can create it here
3157 if (!paint->value.href && document) {
3158 paint->value.href = new SPPaintServerReference(document);
3159 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));
3160 }
3162 // TODO check what this does in light of move away from union
3163 sp_style_set_ipaint_to_uri_string (style, paint, uri);
3164 }
3165 g_free( uri );
3166 }
3168 if (streq(str, "currentColor") && paint != &style->color) {
3169 paint->set = TRUE;
3170 paint->currentcolor = TRUE;
3171 } else if (streq(str, "none") && paint != &style->color) {
3172 paint->set = TRUE;
3173 paint->noneSet = TRUE;
3174 } else {
3175 guint32 const rgb0 = sp_svg_read_color(str, &str, 0xff);
3176 if (rgb0 != 0xff) {
3177 paint->setColor( rgb0 );
3178 paint->set = TRUE;
3180 while (g_ascii_isspace(*str)) {
3181 ++str;
3182 }
3183 if (strneq(str, "icc-color(", 10)) {
3184 SVGICCColor* tmp = new SVGICCColor();
3185 if ( ! sp_svg_read_icc_color( str, &str, tmp ) ) {
3186 delete tmp;
3187 tmp = 0;
3188 }
3189 paint->value.color.icc = tmp;
3190 }
3191 if (strneq(str, "device-gray(", 12) ||
3192 strneq(str, "device-rgb(", 11) ||
3193 strneq(str, "device-cmyk(", 12) ||
3194 strneq(str, "device-nchannel(", 16)) {
3195 SVGDeviceColor* tmp = new SVGDeviceColor();
3196 if ( ! sp_svg_read_device_color( str, &str, tmp ) ) {
3197 delete tmp;
3198 tmp = 0;
3199 }
3200 paint->value.color.device = tmp;
3201 }
3202 }
3203 }
3204 }
3205 }
3209 /**
3210 * Set SPIFontSize object from string.
3211 */
3212 static void
3213 sp_style_read_ifontsize(SPIFontSize *val, gchar const *str)
3214 {
3215 if (!strcmp(str, "inherit")) {
3216 val->set = TRUE;
3217 val->inherit = TRUE;
3218 } else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) {
3219 for (unsigned i = 0; enum_font_size[i].key; i++) {
3220 if (!strcmp(str, enum_font_size[i].key)) {
3221 val->set = TRUE;
3222 val->inherit = FALSE;
3223 val->type = SP_FONT_SIZE_LITERAL;
3224 val->value = enum_font_size[i].value;
3225 return;
3226 }
3227 }
3228 /* Invalid */
3229 return;
3230 } else {
3231 gdouble value;
3232 gchar *e;
3233 /* fixme: Move this to standard place (Lauris) */
3234 value = g_ascii_strtod(str, &e);
3235 if ((gchar const *) e != str) {
3236 if (!*e) {
3237 /* Userspace */
3238 } else if (!strcmp(e, "px")) {
3239 /* Userspace */
3240 } else if (!strcmp(e, "pt")) {
3241 /* Userspace * DEVICESCALE */
3242 value *= PX_PER_PT;
3243 } else if (!strcmp(e, "pc")) {
3244 /* 12pt */
3245 value *= PX_PER_PT * 12.0;
3246 } else if (!strcmp(e, "mm")) {
3247 value *= PX_PER_MM;
3248 } else if (!strcmp(e, "cm")) {
3249 value *= PX_PER_CM;
3250 } else if (!strcmp(e, "in")) {
3251 value *= PX_PER_IN;
3252 } else if (!strcmp(e, "%")) {
3253 /* Percentage */
3254 val->set = TRUE;
3255 val->inherit = FALSE;
3256 val->type = SP_FONT_SIZE_PERCENTAGE;
3257 val->value = SP_F8_16_FROM_FLOAT(value / 100.0);
3258 return;
3259 } else {
3260 /* Invalid */
3261 return;
3262 }
3263 /* Length */
3264 val->set = TRUE;
3265 val->inherit = FALSE;
3266 val->type = SP_FONT_SIZE_LENGTH;
3267 val->computed = value;
3268 return;
3269 }
3270 }
3271 }
3275 /**
3276 * Set SPIFilter object from string.
3277 */
3278 static void
3279 sp_style_read_ifilter(gchar const *str, SPStyle * style, SPDocument *document)
3280 {
3281 SPIFilter *f = &(style->filter);
3282 /* Try all possible values: inherit, none, uri */
3283 if (streq(str, "inherit")) {
3284 f->set = TRUE;
3285 f->inherit = TRUE;
3286 if (f->href && f->href->getObject())
3287 f->href->detach();
3288 } else if(streq(str, "none")) {
3289 f->set = TRUE;
3290 f->inherit = FALSE;
3291 if (f->href && f->href->getObject())
3292 f->href->detach();
3293 } else if (strneq(str, "url", 3)) {
3294 char *uri = extract_uri(str);
3295 if(uri == NULL || uri[0] == '\0') {
3296 g_warning("Specified filter url is empty");
3297 f->set = TRUE;
3298 f->inherit = FALSE;
3299 return;
3300 }
3301 f->set = TRUE;
3302 f->inherit = FALSE;
3303 if (f->href && f->href->getObject())
3304 f->href->detach();
3306 // it may be that this style has not yet created its SPFilterReference;
3307 // now that we have a document, we can create it here
3308 if (!f->href && document) {
3309 f->href = new SPFilterReference(document);
3310 f->href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_filter_ref_changed), style));
3311 }
3313 try {
3314 f->href->attach(Inkscape::URI(uri));
3315 } catch (Inkscape::BadURIException &e) {
3316 g_warning("%s", e.what());
3317 f->href->detach();
3318 }
3319 g_free (uri);
3321 } else {
3322 /* We shouldn't reach this if SVG input is well-formed */
3323 f->set = FALSE;
3324 f->inherit = FALSE;
3325 if (f->href && f->href->getObject())
3326 f->href->detach();
3327 }
3328 }
3330 /**
3331 * Set SPIEnum object from repr attribute.
3332 */
3333 static void
3334 sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr,
3335 gchar const *key, SPStyleEnum const *dict,
3336 bool const can_explicitly_inherit)
3337 {
3338 gchar const *str = repr->attribute(key);
3339 if (str) {
3340 sp_style_read_ienum(val, str, dict, can_explicitly_inherit);
3341 }
3342 }
3346 /**
3347 * Set SPILength object from repr attribute.
3348 */
3349 static void
3350 sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key)
3351 {
3352 gchar const *str = repr->attribute(key);
3353 if (str) {
3354 sp_style_read_ilength(val, str);
3355 }
3356 }
3358 /**
3359 * Set SPIFontSize object from repr attribute.
3360 */
3361 static void
3362 sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key)
3363 {
3364 gchar const *str = repr->attribute(key);
3365 if (str) {
3366 sp_style_read_ifontsize(val, str);
3367 }
3368 }
3371 /**
3372 * Set SPIFloat object from repr attribute.
3373 */
3374 static void
3375 sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key)
3376 {
3377 gchar const *str = repr->attribute(key);
3378 if (str) {
3379 sp_style_read_ifloat(val, str);
3380 }
3381 }
3384 /**
3385 * Write SPIFloat object into string.
3386 */
3387 static gint
3388 sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key,
3389 SPIFloat const *const val, SPIFloat const *const base, guint const flags)
3390 {
3391 Inkscape::CSSOStringStream os;
3393 if ((flags & SP_STYLE_FLAG_ALWAYS)
3394 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3395 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3396 && (!base->set || (val->value != base->value))))
3397 {
3398 if (val->inherit) {
3399 return g_snprintf(p, len, "%s:inherit;", key);
3400 } else {
3401 os << key << ":" << val->value << ";";
3402 return g_strlcpy(p, os.str().c_str(), len);
3403 }
3404 }
3405 return 0;
3406 }
3409 /**
3410 * Write SPIScale24 object into string.
3411 */
3412 static gint
3413 sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key,
3414 SPIScale24 const *const val, SPIScale24 const *const base,
3415 guint const flags)
3416 {
3417 Inkscape::CSSOStringStream os;
3419 if ((flags & SP_STYLE_FLAG_ALWAYS)
3420 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3421 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3422 && (!base->set || (val->value != base->value))))
3423 {
3424 if (val->inherit) {
3425 return g_snprintf(p, len, "%s:inherit;", key);
3426 } else {
3427 os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";";
3428 return g_strlcpy(p, os.str().c_str(), len);
3429 }
3430 }
3431 return 0;
3432 }
3435 /**
3436 * Write SPIEnum object into string.
3437 */
3438 static gint
3439 sp_style_write_ienum(gchar *p, gint const len, gchar const *const key,
3440 SPStyleEnum const *const dict,
3441 SPIEnum const *const val, SPIEnum const *const base, guint const flags)
3442 {
3443 if ((flags & SP_STYLE_FLAG_ALWAYS)
3444 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3445 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3446 && (!base->set || (val->computed != base->computed))))
3447 {
3448 if (val->inherit) {
3449 return g_snprintf(p, len, "%s:inherit;", key);
3450 }
3451 for (unsigned i = 0; dict[i].key; i++) {
3452 if (dict[i].value == static_cast< gint > (val->value) ) {
3453 return g_snprintf(p, len, "%s:%s;", key, dict[i].key);
3454 }
3455 }
3456 }
3457 return 0;
3458 }
3462 /**
3463 * Write SPIString object into string.
3464 */
3465 static gint
3466 sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
3467 SPIString const *const val, SPIString const *const base, guint const flags)
3468 {
3469 if ((flags & SP_STYLE_FLAG_ALWAYS)
3470 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3471 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3472 && (!base->set || strcmp(val->value, base->value))))
3473 {
3474 if (val->inherit) {
3475 return g_snprintf(p, len, "%s:inherit;", key);
3476 } else {
3477 gchar *val_quoted = css2_escape_quote(val->value);
3478 if (val_quoted) {
3479 return g_snprintf(p, len, "%s:%s;", key, val_quoted);
3480 g_free (val_quoted);
3481 }
3482 }
3483 }
3484 return 0;
3485 }
3488 /**
3489 *
3490 */
3491 static bool
3492 sp_length_differ(SPILength const *const a, SPILength const *const b)
3493 {
3494 if (a->unit != b->unit) {
3495 if (a->unit == SP_CSS_UNIT_EM) return true;
3496 if (a->unit == SP_CSS_UNIT_EX) return true;
3497 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3498 if (b->unit == SP_CSS_UNIT_EM) return true;
3499 if (b->unit == SP_CSS_UNIT_EX) return true;
3500 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3501 }
3503 return (a->computed != b->computed);
3504 }
3508 /**
3509 * Write SPILength object into string.
3510 */
3511 static gint
3512 sp_style_write_ilength(gchar *p, gint const len, gchar const *const key,
3513 SPILength const *const val, SPILength const *const base, guint const flags)
3514 {
3515 Inkscape::CSSOStringStream os;
3517 if ((flags & SP_STYLE_FLAG_ALWAYS)
3518 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3519 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3520 && (!base->set || sp_length_differ(val, base))))
3521 {
3522 if (val->inherit) {
3523 return g_snprintf(p, len, "%s:inherit;", key);
3524 } else {
3525 switch (val->unit) {
3526 case SP_CSS_UNIT_NONE:
3527 os << key << ":" << val->computed << ";";
3528 return g_strlcpy(p, os.str().c_str(), len);
3529 break;
3530 case SP_CSS_UNIT_PX:
3531 os << key << ":" << val->computed << "px;";
3532 return g_strlcpy(p, os.str().c_str(), len);
3533 break;
3534 case SP_CSS_UNIT_PT:
3535 os << key << ":" << val->computed * PT_PER_PX << "pt;";
3536 return g_strlcpy(p, os.str().c_str(), len);
3537 break;
3538 case SP_CSS_UNIT_PC:
3539 os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;";
3540 return g_strlcpy(p, os.str().c_str(), len);
3541 break;
3542 case SP_CSS_UNIT_MM:
3543 os << key << ":" << val->computed * MM_PER_PX << "mm;";
3544 return g_strlcpy(p, os.str().c_str(), len);
3545 break;
3546 case SP_CSS_UNIT_CM:
3547 os << key << ":" << val->computed * CM_PER_PX << "cm;";
3548 return g_strlcpy(p, os.str().c_str(), len);
3549 break;
3550 case SP_CSS_UNIT_IN:
3551 os << key << ":" << val->computed * IN_PER_PX << "in;";
3552 return g_strlcpy(p, os.str().c_str(), len);
3553 break;
3554 case SP_CSS_UNIT_EM:
3555 os << key << ":" << val->value << "em;";
3556 return g_strlcpy(p, os.str().c_str(), len);
3557 break;
3558 case SP_CSS_UNIT_EX:
3559 os << key << ":" << val->value << "ex;";
3560 return g_strlcpy(p, os.str().c_str(), len);
3561 break;
3562 case SP_CSS_UNIT_PERCENT:
3563 os << key << ":" << (val->value * 100.0) << "%;";
3564 return g_strlcpy(p, os.str().c_str(), len);
3565 break;
3566 default:
3567 /* Invalid */
3568 break;
3569 }
3570 }
3571 }
3572 return 0;
3573 }
3576 /**
3577 *
3578 */
3579 static bool
3580 sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b)
3581 {
3582 if (a->normal != b->normal) return true;
3583 if (a->normal) return false;
3585 if (a->unit != b->unit) {
3586 if (a->unit == SP_CSS_UNIT_EM) return true;
3587 if (a->unit == SP_CSS_UNIT_EX) return true;
3588 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3589 if (b->unit == SP_CSS_UNIT_EM) return true;
3590 if (b->unit == SP_CSS_UNIT_EX) return true;
3591 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3592 }
3594 return (a->computed != b->computed);
3595 }
3597 /**
3598 * Write SPILengthOrNormal object into string.
3599 */
3600 static gint
3601 sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key,
3602 SPILengthOrNormal const *const val,
3603 SPILengthOrNormal const *const base,
3604 guint const flags)
3605 {
3606 if ((flags & SP_STYLE_FLAG_ALWAYS)
3607 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3608 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3609 && (!base->set || sp_lengthornormal_differ(val, base))))
3610 {
3611 if (val->normal) {
3612 return g_snprintf(p, len, "%s:normal;", key);
3613 } else {
3614 SPILength length;
3615 length.set = val->set;
3616 length.inherit = val->inherit;
3617 length.unit = val->unit;
3618 length.value = val->value;
3619 length.computed = val->computed;
3620 return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS);
3621 }
3622 }
3623 return 0;
3624 }
3626 /**
3627 *
3628 */
3629 static bool
3630 sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b)
3631 {
3632 return a->underline != b->underline
3633 || a->overline != b->overline
3634 || a->line_through != b->line_through
3635 || a->blink != b->blink;
3636 }
3638 /**
3639 * Write SPITextDecoration object into string.
3640 */
3641 static gint
3642 sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key,
3643 SPITextDecoration const *const val,
3644 SPITextDecoration const *const base,
3645 guint const flags)
3646 {
3647 Inkscape::CSSOStringStream os;
3649 if ((flags & SP_STYLE_FLAG_ALWAYS)
3650 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3651 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3652 && (!base->set || sp_textdecoration_differ(val, base))))
3653 {
3654 if (val->inherit) {
3655 return g_snprintf(p, len, "%s:inherit;", key);
3656 } else {
3657 os << key << ":";
3658 if (val->underline || val->overline || val->line_through || val->blink) {
3659 if (val->underline) os << " underline";
3660 if (val->overline) os << " overline";
3661 if (val->line_through) os << " line-through";
3662 if (val->blink) os << " blink";
3663 } else
3664 os << "none";
3665 os << ";";
3666 return g_strlcpy(p, os.str().c_str(), len);
3667 }
3668 }
3669 return 0;
3670 }
3672 /**
3673 *
3674 */
3675 static bool
3676 sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
3677 {
3678 if ( (a->isColor() != b->isColor())
3679 || (a->isPaintserver() != b->isPaintserver())
3680 || (a->set != b->set)
3681 || (a->currentcolor != b->currentcolor)
3682 || (a->inherit!= b->inherit) ) {
3683 return true;
3684 }
3686 // TODO refactor to allow for mixed paints (rgb() *and* url(), etc)
3688 if ( a->isPaintserver() ) {
3689 return (a->value.href == NULL || b->value.href == NULL || a->value.href->getObject() != b->value.href->getObject());
3690 }
3692 if ( a->isColor() ) {
3693 return !( (a->value.color == b->value.color)
3694 && ((a->value.color.icc == b->value.color.icc)
3695 || (a->value.color.icc && b->value.color.icc
3696 && (a->value.color.icc->colorProfile == b->value.color.icc->colorProfile)
3697 && (a->value.color.icc->colors == b->value.color.icc->colors))));
3698 /* todo: Allow for epsilon differences in iccColor->colors, e.g. changes small enough not to show up
3699 * in the string representation. */
3700 }
3702 return false;
3703 }
3707 /**
3708 * Write SPIPaint object into string.
3709 */
3710 static gint
3711 sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
3712 SPIPaint const *const paint, SPIPaint const *const base, guint const flags)
3713 {
3714 int retval = 0;
3716 if ((flags & SP_STYLE_FLAG_ALWAYS)
3717 || ((flags & SP_STYLE_FLAG_IFSET) && paint->set)
3718 || ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set
3719 && (!base->set || sp_paint_differ(paint, base))))
3720 {
3721 CSSOStringStream css;
3723 if (paint->inherit) {
3724 css << "inherit";
3725 } else {
3726 if ( paint->value.href && paint->value.href->getURI() ) {
3727 const gchar* uri = paint->value.href->getURI()->toString();
3728 css << "url(" << uri << ")";
3729 }
3731 if ( paint->noneSet ) {
3732 if ( !css.str().empty() ) {
3733 css << " ";
3734 }
3735 css << "none";
3736 }
3738 if ( paint->currentcolor ) {
3739 if ( !css.str().empty() ) {
3740 css << " ";
3741 }
3742 css << "currentColor";
3743 }
3745 if ( paint->colorSet && !paint->currentcolor ) {
3746 if ( !css.str().empty() ) {
3747 css << " ";
3748 }
3749 char color_buf[8];
3750 sp_svg_write_color(color_buf, sizeof(color_buf), paint->value.color.toRGBA32( 0 ));
3751 css << color_buf;
3752 }
3754 if (paint->value.color.icc && !paint->currentcolor) {
3755 if ( !css.str().empty() ) {
3756 css << " ";
3757 }
3758 css << "icc-color(" << paint->value.color.icc->colorProfile;
3759 for (vector<double>::const_iterator i(paint->value.color.icc->colors.begin()),
3760 iEnd(paint->value.color.icc->colors.end());
3761 i != iEnd; ++i) {
3762 css << ", " << *i;
3763 }
3764 css << ')';
3765 }
3766 }
3768 if ( !css.str().empty() ) {
3769 retval = g_snprintf( b, len, "%s:%s;", key, css.str().c_str() );
3770 }
3771 }
3773 return retval;
3774 }
3777 /**
3778 *
3779 */
3780 static bool
3781 sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b)
3782 {
3783 if (a->type != b->type)
3784 return true;
3785 if (a->type == SP_FONT_SIZE_LENGTH) {
3786 if (a->computed != b->computed)
3787 return true;
3788 } else {
3789 if (a->value != b->value)
3790 return true;
3791 }
3792 return false;
3793 }
3796 /**
3797 * Write SPIFontSize object into string.
3798 */
3799 static gint
3800 sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key,
3801 SPIFontSize const *const val, SPIFontSize const *const base,
3802 guint const flags)
3803 {
3804 if ((flags & SP_STYLE_FLAG_ALWAYS)
3805 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3806 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3807 && (!base->set || sp_fontsize_differ(val, base))))
3808 {
3809 if (val->inherit) {
3810 return g_snprintf(p, len, "%s:inherit;", key);
3811 } else if (val->type == SP_FONT_SIZE_LITERAL) {
3812 for (unsigned i = 0; enum_font_size[i].key; i++) {
3813 if (enum_font_size[i].value == static_cast< gint > (val->value) ) {
3814 return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key);
3815 }
3816 }
3817 } else if (val->type == SP_FONT_SIZE_LENGTH) {
3818 Inkscape::CSSOStringStream os;
3819 os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
3820 return g_strlcpy(p, os.str().c_str(), len);
3821 } else if (val->type == SP_FONT_SIZE_PERCENTAGE) {
3822 Inkscape::CSSOStringStream os;
3823 os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;";
3824 return g_strlcpy(p, os.str().c_str(), len);
3825 }
3826 }
3827 return 0;
3828 }
3831 /**
3832 * Write SPIFilter object into string.
3833 */
3834 static gint
3835 sp_style_write_ifilter(gchar *p, gint const len, gchar const *key,
3836 SPIFilter const *const val, SPIFilter const *const base,
3837 guint const flags)
3838 {
3839 (void)base; // TODO
3840 if ((flags & SP_STYLE_FLAG_ALWAYS)
3841 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3842 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set))
3843 {
3844 if (val->inherit) {
3845 return g_snprintf(p, len, "%s:inherit;", key);
3846 } else if (val->href && val->href->getURI()) {
3847 return g_snprintf(p, len, "%s:url(%s);", key, val->href->getURI()->toString());
3848 }
3849 }
3852 return 0;
3853 }
3856 void SPIPaint::clear()
3857 {
3858 set = false;
3859 inherit = false;
3860 currentcolor = false;
3861 colorSet = false;
3862 noneSet = false;
3863 value.color.set( 0 );
3864 if ( value.href && value.href->getObject() )
3865 {
3866 value.href->detach();
3867 }
3868 }
3871 /**
3872 * Clear filter object, and disconnect style from paintserver (if present).
3873 */
3874 static void
3875 sp_style_filter_clear(SPStyle *style)
3876 {
3877 if (style->filter.href && style->filter.href->getObject())
3878 style->filter.href->detach();
3879 }
3882 // FIXME: Everything below this line belongs in a different file - css-chemistry?
3884 void
3885 sp_style_set_property_url (SPObject *item, gchar const *property, SPObject *linked, bool recursive)
3886 {
3887 Inkscape::XML::Node *repr = SP_OBJECT_REPR(item);
3889 if (repr == NULL) return;
3891 SPCSSAttr *css = sp_repr_css_attr_new();
3892 if (linked) {
3893 gchar *val = g_strdup_printf("url(#%s)", linked->getId());
3894 sp_repr_css_set_property(css, property, val);
3895 g_free(val);
3896 } else {
3897 sp_repr_css_unset_property(css, "filter");
3898 }
3900 if (recursive) {
3901 sp_repr_css_change_recursive(repr, css, "style");
3902 } else {
3903 sp_repr_css_change(repr, css, "style");
3904 }
3905 sp_repr_css_attr_unref(css);
3906 }
3909 /**
3910 * Clear all style property attributes in object.
3911 */
3912 void
3913 sp_style_unset_property_attrs(SPObject *o)
3914 {
3915 if (!o) return;
3917 SPStyle *style = SP_OBJECT_STYLE(o);
3918 if (!style) return;
3920 Inkscape::XML::Node *repr = SP_OBJECT_REPR(o);
3921 if (!repr) return;
3923 if (style->opacity.set) {
3924 repr->setAttribute("opacity", NULL);
3925 }
3926 if (style->color.set) {
3927 repr->setAttribute("color", NULL);
3928 }
3929 if (style->fill.set) {
3930 repr->setAttribute("fill", NULL);
3931 }
3932 if (style->fill_opacity.set) {
3933 repr->setAttribute("fill-opacity", NULL);
3934 }
3935 if (style->fill_rule.set) {
3936 repr->setAttribute("fill-rule", NULL);
3937 }
3938 if (style->stroke.set) {
3939 repr->setAttribute("stroke", NULL);
3940 }
3941 if (style->stroke_width.set) {
3942 repr->setAttribute("stroke-width", NULL);
3943 }
3944 if (style->stroke_linecap.set) {
3945 repr->setAttribute("stroke-linecap", NULL);
3946 }
3947 if (style->stroke_linejoin.set) {
3948 repr->setAttribute("stroke-linejoin", NULL);
3949 }
3950 if (style->marker[SP_MARKER_LOC].set) {
3951 repr->setAttribute("marker", NULL);
3952 }
3953 if (style->marker[SP_MARKER_LOC_START].set) {
3954 repr->setAttribute("marker-start", NULL);
3955 }
3956 if (style->marker[SP_MARKER_LOC_MID].set) {
3957 repr->setAttribute("marker-mid", NULL);
3958 }
3959 if (style->marker[SP_MARKER_LOC_END].set) {
3960 repr->setAttribute("marker-end", NULL);
3961 }
3962 if (style->stroke_opacity.set) {
3963 repr->setAttribute("stroke-opacity", NULL);
3964 }
3965 if (style->stroke_dasharray_set) {
3966 repr->setAttribute("stroke-dasharray", NULL);
3967 }
3968 if (style->stroke_dashoffset_set) {
3969 repr->setAttribute("stroke-dashoffset", NULL);
3970 }
3971 if (style->text_private && style->text->font_specification.set) {
3972 repr->setAttribute("-inkscape-font-specification", NULL);
3973 }
3974 if (style->text_private && style->text->font_family.set) {
3975 repr->setAttribute("font-family", NULL);
3976 }
3977 if (style->text_anchor.set) {
3978 repr->setAttribute("text-anchor", NULL);
3979 }
3980 if (style->writing_mode.set) {
3981 repr->setAttribute("writing_mode", NULL);
3982 }
3983 if (style->filter.set) {
3984 repr->setAttribute("filter", NULL);
3985 }
3986 if (style->enable_background.set) {
3987 repr->setAttribute("enable-background", NULL);
3988 }
3989 }
3991 /**
3992 * \pre style != NULL.
3993 * \pre flags in {IFSET, ALWAYS}.
3994 */
3995 SPCSSAttr *
3996 sp_css_attr_from_style(SPStyle const *const style, guint const flags)
3997 {
3998 g_return_val_if_fail(style != NULL, NULL);
3999 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
4000 (flags == SP_STYLE_FLAG_ALWAYS) ),
4001 NULL);
4002 gchar *style_str = sp_style_write_string(style, flags);
4003 SPCSSAttr *css = sp_repr_css_attr_new();
4004 sp_repr_css_attr_add_from_string(css, style_str);
4005 g_free(style_str);
4006 return css;
4007 }
4010 /**
4011 * \pre object != NULL
4012 * \pre flags in {IFSET, ALWAYS}.
4013 */
4014 SPCSSAttr *
4015 sp_css_attr_from_object(SPObject *object, guint const flags)
4016 {
4017 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
4018 (flags == SP_STYLE_FLAG_ALWAYS) ),
4019 NULL);
4020 SPStyle const *const style = SP_OBJECT_STYLE(object);
4021 if (style == NULL)
4022 return NULL;
4023 return sp_css_attr_from_style(style, flags);
4024 }
4026 /**
4027 * Unset any text-related properties
4028 */
4029 SPCSSAttr *
4030 sp_css_attr_unset_text(SPCSSAttr *css)
4031 {
4032 sp_repr_css_set_property(css, "font", NULL); // not implemented yet
4033 sp_repr_css_set_property(css, "-inkscape-font-specification", NULL);
4034 sp_repr_css_set_property(css, "font-size", NULL);
4035 sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet
4036 sp_repr_css_set_property(css, "font-style", NULL);
4037 sp_repr_css_set_property(css, "font-variant", NULL);
4038 sp_repr_css_set_property(css, "font-weight", NULL);
4039 sp_repr_css_set_property(css, "font-stretch", NULL);
4040 sp_repr_css_set_property(css, "font-family", NULL);
4041 sp_repr_css_set_property(css, "text-indent", NULL);
4042 sp_repr_css_set_property(css, "text-align", NULL);
4043 sp_repr_css_set_property(css, "text-decoration", NULL);
4044 sp_repr_css_set_property(css, "line-height", NULL);
4045 sp_repr_css_set_property(css, "letter-spacing", NULL);
4046 sp_repr_css_set_property(css, "word-spacing", NULL);
4047 sp_repr_css_set_property(css, "text-transform", NULL);
4048 sp_repr_css_set_property(css, "direction", NULL);
4049 sp_repr_css_set_property(css, "block-progression", NULL);
4050 sp_repr_css_set_property(css, "writing-mode", NULL);
4051 sp_repr_css_set_property(css, "text-anchor", NULL);
4052 sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet
4053 sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet
4054 sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet
4055 sp_repr_css_set_property(css, "baseline-shift", NULL); // not implemented yet
4057 return css;
4058 }
4060 bool
4061 is_url(char const *p)
4062 {
4063 if (p == NULL)
4064 return false;
4065 /** \todo
4066 * FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs
4067 * in property values must start with 'url('.
4068 */
4069 return (g_ascii_strncasecmp(p, "url(", 4) == 0);
4070 }
4072 /**
4073 * Unset any properties that contain URI values.
4074 *
4075 * Used for storing style that will be reused across documents when carrying
4076 * the referenced defs is impractical.
4077 */
4078 SPCSSAttr *
4079 sp_css_attr_unset_uris(SPCSSAttr *css)
4080 {
4081 // All properties that may hold <uri> or <paint> according to SVG 1.1
4082 if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL);
4083 if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL);
4084 if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL);
4085 if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL);
4086 if (is_url(sp_repr_css_property(css, "marker", NULL))) sp_repr_css_set_property(css, "marker", NULL);
4087 if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL);
4088 if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL);
4089 if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL);
4090 if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL);
4091 if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL);
4092 if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL);
4094 return css;
4095 }
4097 /**
4098 * Scale a single-value property.
4099 */
4100 void
4101 sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property,
4102 double ex, bool only_with_units = false)
4103 {
4104 gchar const *w = sp_repr_css_property(css, property, NULL);
4105 if (w) {
4106 gchar *units = NULL;
4107 double wd = g_ascii_strtod(w, &units) * ex;
4108 if (w == units) {// nothing converted, non-numeric value
4109 return;
4110 }
4111 if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) {
4112 // only_with_units, but no units found, so do nothing.
4113 return;
4114 }
4115 Inkscape::CSSOStringStream os;
4116 os << wd << units; // reattach units
4117 sp_repr_css_set_property(css, property, os.str().c_str());
4118 }
4119 }
4121 /**
4122 * Scale a list-of-values property.
4123 */
4124 void
4125 sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex)
4126 {
4127 gchar const *string = sp_repr_css_property(css, property, NULL);
4128 if (string) {
4129 Inkscape::CSSOStringStream os;
4130 gchar **a = g_strsplit(string, ",", 10000);
4131 bool first = true;
4132 for (gchar **i = a; i != NULL; i++) {
4133 gchar *w = *i;
4134 if (w == NULL)
4135 break;
4136 gchar *units = NULL;
4137 double wd = g_ascii_strtod(w, &units) * ex;
4138 if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing
4139 g_strfreev(a);
4140 return;
4141 }
4142 if (!first) {
4143 os << ",";
4144 }
4145 os << wd << units; // reattach units
4146 first = false;
4147 }
4148 sp_repr_css_set_property(css, property, os.str().c_str());
4149 g_strfreev(a);
4150 }
4151 }
4153 /**
4154 * Scale any properties that may hold <length> by ex.
4155 */
4156 SPCSSAttr *
4157 sp_css_attr_scale(SPCSSAttr *css, double ex)
4158 {
4159 sp_css_attr_scale_property_single(css, "baseline-shift", ex);
4160 sp_css_attr_scale_property_single(css, "stroke-width", ex);
4161 sp_css_attr_scale_property_list (css, "stroke-dasharray", ex);
4162 sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex);
4163 sp_css_attr_scale_property_single(css, "font-size", ex);
4164 sp_css_attr_scale_property_single(css, "kerning", ex);
4165 sp_css_attr_scale_property_single(css, "letter-spacing", ex);
4166 sp_css_attr_scale_property_single(css, "word-spacing", ex);
4167 sp_css_attr_scale_property_single(css, "line-height", ex, true);
4169 return css;
4170 }
4173 /**
4174 * Remove quotes and escapes from a string. Returned value must be g_free'd.
4175 * Note: in CSS (in style= and in stylesheets), unquoting and unescaping is done
4176 * by libcroco, our CSS parser, though it adds a new pair of "" quotes for the strings
4177 * it parsed for us. So this function is only used to remove those quotes and for
4178 * presentation attributes, without any unescaping. (XML unescaping
4179 * (& etc) is done by XML parser.)
4180 */
4181 gchar *
4182 attribute_unquote(gchar const *val)
4183 {
4184 if (val) {
4185 if (*val == '\'' || *val == '"') {
4186 int l = strlen(val);
4187 if (l >= 2) {
4188 if ( ( val[0] == '"' && val[l - 1] == '"' ) ||
4189 ( val[0] == '\'' && val[l - 1] == '\'' ) ) {
4190 return (g_strndup (val+1, l-2));
4191 }
4192 }
4193 }
4194 }
4196 return (val? g_strdup (val) : NULL);
4197 }
4199 /**
4200 * Quote and/or escape string for writing to CSS (style=). Returned value must be g_free'd.
4201 */
4202 gchar *
4203 css2_escape_quote(gchar const *val) {
4205 Glib::ustring t;
4206 bool quote = false;
4207 bool last_was_space = false;
4209 for (gchar const *i = val; *i; i++) {
4210 bool is_space = ( *i == ' ' );
4211 if (g_ascii_isalnum(*i) || *i=='-' || *i=='_') {
4212 // ASCII alphanumeric, - and _ don't require quotes
4213 t.push_back(*i);
4214 } else if ( is_space && !last_was_space ) {
4215 // non-consecutive spaces don't require quotes
4216 t.push_back(*i);
4217 } else if (*i=='\'') {
4218 // single quotes require escaping and quotes
4219 t.push_back('\\');
4220 t.push_back(*i);
4221 quote = true;
4222 } else {
4223 // everything else requires quotes
4224 t.push_back(*i);
4225 quote = true;
4226 }
4227 if (i == val && !g_ascii_isalpha(*i)) {
4228 // a non-ASCII/non-alpha initial character requires quotes
4229 quote = true;
4230 }
4231 last_was_space = is_space;
4232 }
4234 if (last_was_space) {
4235 // a trailing space requires quotes
4236 quote = true;
4237 }
4239 if (quote) {
4240 // we use single quotes so the result can be stored in an XML
4241 // attribute without incurring un-aesthetic additional quoting
4242 // (our XML emitter always uses double quotes)
4243 t.insert(t.begin(), '\'');
4244 t.push_back('\'');
4245 }
4247 return (t.empty() ? NULL : g_strdup (t.c_str()));
4248 }
4250 /*
4251 Local Variables:
4252 mode:c++
4253 c-file-style:"stroustrup"
4254 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
4255 indent-tabs-mode:nil
4256 fill-column:99
4257 End:
4258 */
4259 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :