87151c5a847feb38dd29251140c03aa88e37f460
1 #define __SP_STYLE_C__
3 /** \file
4 * 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 "libcroco/cr-sel-eng.h"
23 #include "xml/croco-node-iface.h"
25 #include "svg/svg.h"
26 #include "svg/svg-color.h"
27 #include "svg/svg-icc-color.h"
29 #include "display/canvas-bpath.h"
30 #include "attributes.h"
31 #include "document.h"
32 #include "extract-uri.h"
33 #include "uri-references.h"
34 #include "uri.h"
35 #include "sp-paint-server.h"
36 #include "streq.h"
37 #include "strneq.h"
38 #include "style.h"
39 #include "svg/css-ostringstream.h"
40 #include "xml/repr.h"
41 #include "unit-constants.h"
42 #include "isnan.h"
43 #include "macros.h"
45 #include "sp-filter-reference.h"
47 #include <sigc++/functors/ptr_fun.h>
48 #include <sigc++/adaptors/bind.h>
50 using Inkscape::CSSOStringStream;
51 using std::vector;
53 #define BMAX 8192
55 class SPStyleEnum;
57 /*#########################
58 ## FORWARD DECLARATIONS
59 #########################*/
60 static void sp_style_clear(SPStyle *style);
62 static void sp_style_merge_property(SPStyle *style, gint id, gchar const *val);
64 static void sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent);
65 static void sp_style_merge_ifilter(SPStyle *style, SPIFilter const *parent);
66 static void sp_style_read_dash(SPStyle *style, gchar const *str);
68 static SPTextStyle *sp_text_style_new(void);
69 static void sp_text_style_clear(SPTextStyle *ts);
70 static SPTextStyle *sp_text_style_unref(SPTextStyle *st);
71 static SPTextStyle *sp_text_style_duplicate_unset(SPTextStyle *st);
72 static guint sp_text_style_write(gchar *p, guint len, SPTextStyle const *st, guint flags = SP_STYLE_FLAG_IFSET);
73 static void sp_style_privatize_text(SPStyle *style);
75 static void sp_style_read_ifloat(SPIFloat *val, gchar const *str);
76 static void sp_style_read_iscale24(SPIScale24 *val, gchar const *str);
77 static void sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict, bool can_explicitly_inherit);
78 static void sp_style_read_istring(SPIString *val, gchar const *str);
79 static void sp_style_read_ilength(SPILength *val, gchar const *str);
80 static void sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str);
81 static void sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str);
82 static void sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
83 static void sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
84 static void sp_style_read_ifontsize(SPIFontSize *val, gchar const *str);
85 static void sp_style_read_ifilter(gchar const *str, SPStyle *style, SPDocument *document);
87 static void sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr, gchar const *key, SPStyleEnum const *dict, bool can_explicitly_inherit);
88 static void sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key);
89 static void sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key);
90 static void sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key);
92 static gint sp_style_write_ifloat(gchar *p, gint len, gchar const *key, SPIFloat const *val, SPIFloat const *base, guint flags);
93 static gint sp_style_write_iscale24(gchar *p, gint len, gchar const *key, SPIScale24 const *val, SPIScale24 const *base, guint flags);
94 static gint sp_style_write_ienum(gchar *p, gint len, gchar const *key, SPStyleEnum const *dict, SPIEnum const *val, SPIEnum const *base, guint flags);
95 static gint sp_style_write_istring(gchar *p, gint len, gchar const *key, SPIString const *val, SPIString const *base, guint flags);
96 static gint sp_style_write_ilength(gchar *p, gint len, gchar const *key, SPILength const *val, SPILength const *base, guint flags);
97 static gint sp_style_write_ipaint(gchar *b, gint len, gchar const *key, SPIPaint const *paint, SPIPaint const *base, guint flags);
98 static gint sp_style_write_ifontsize(gchar *p, gint len, gchar const *key, SPIFontSize const *val, SPIFontSize const *base, guint flags);
99 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);
100 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);
101 static gint sp_style_write_ifilter(gchar *b, gint len, gchar const *key, SPIFilter const *filter, SPIFilter const *base, guint flags);
103 static void sp_style_paint_clear(SPStyle *style, SPIPaint *paint);
105 static void sp_style_filter_clear(SPStyle *style);
107 #define SPS_READ_IENUM_IF_UNSET(v,s,d,i) if (!(v)->set) {sp_style_read_ienum((v), (s), (d), (i));}
108 #define SPS_READ_PENUM_IF_UNSET(v,r,k,d,i) if (!(v)->set) {sp_style_read_penum((v), (r), (k), (d), (i));}
110 #define SPS_READ_ILENGTH_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ilength((v), (s));}
111 #define SPS_READ_PLENGTH_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_plength((v), (r), (k));}
113 #define SPS_READ_PFLOAT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfloat((v), (r), (k));}
115 #define SPS_READ_IFONTSIZE_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ifontsize((v), (s));}
116 #define SPS_READ_PFONTSIZE_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfontsize((v), (r), (k));}
118 static void sp_style_merge_from_object_stylesheet(SPStyle *, SPObject const *);
120 struct SPStyleEnum {
121 gchar const *key;
122 gint value;
123 };
125 static SPStyleEnum const enum_fill_rule[] = {
126 {"nonzero", SP_WIND_RULE_NONZERO},
127 {"evenodd", SP_WIND_RULE_EVENODD},
128 {NULL, -1}
129 };
131 static SPStyleEnum const enum_stroke_linecap[] = {
132 {"butt", SP_STROKE_LINECAP_BUTT},
133 {"round", SP_STROKE_LINECAP_ROUND},
134 {"square", SP_STROKE_LINECAP_SQUARE},
135 {NULL, -1}
136 };
138 static SPStyleEnum const enum_stroke_linejoin[] = {
139 {"miter", SP_STROKE_LINEJOIN_MITER},
140 {"round", SP_STROKE_LINEJOIN_ROUND},
141 {"bevel", SP_STROKE_LINEJOIN_BEVEL},
142 {NULL, -1}
143 };
145 static SPStyleEnum const enum_font_style[] = {
146 {"normal", SP_CSS_FONT_STYLE_NORMAL},
147 {"italic", SP_CSS_FONT_STYLE_ITALIC},
148 {"oblique", SP_CSS_FONT_STYLE_OBLIQUE},
149 {NULL, -1}
150 };
152 static SPStyleEnum const enum_font_size[] = {
153 {"xx-small", SP_CSS_FONT_SIZE_XX_SMALL},
154 {"x-small", SP_CSS_FONT_SIZE_X_SMALL},
155 {"small", SP_CSS_FONT_SIZE_SMALL},
156 {"medium", SP_CSS_FONT_SIZE_MEDIUM},
157 {"large", SP_CSS_FONT_SIZE_LARGE},
158 {"x-large", SP_CSS_FONT_SIZE_X_LARGE},
159 {"xx-large", SP_CSS_FONT_SIZE_XX_LARGE},
160 {"smaller", SP_CSS_FONT_SIZE_SMALLER},
161 {"larger", SP_CSS_FONT_SIZE_LARGER},
162 {NULL, -1}
163 };
165 static SPStyleEnum const enum_font_variant[] = {
166 {"normal", SP_CSS_FONT_VARIANT_NORMAL},
167 {"small-caps", SP_CSS_FONT_VARIANT_SMALL_CAPS},
168 {NULL, -1}
169 };
171 static SPStyleEnum const enum_font_weight[] = {
172 {"100", SP_CSS_FONT_WEIGHT_100},
173 {"200", SP_CSS_FONT_WEIGHT_200},
174 {"300", SP_CSS_FONT_WEIGHT_300},
175 {"400", SP_CSS_FONT_WEIGHT_400},
176 {"500", SP_CSS_FONT_WEIGHT_500},
177 {"600", SP_CSS_FONT_WEIGHT_600},
178 {"700", SP_CSS_FONT_WEIGHT_700},
179 {"800", SP_CSS_FONT_WEIGHT_800},
180 {"900", SP_CSS_FONT_WEIGHT_900},
181 {"normal", SP_CSS_FONT_WEIGHT_NORMAL},
182 {"bold", SP_CSS_FONT_WEIGHT_BOLD},
183 {"lighter", SP_CSS_FONT_WEIGHT_LIGHTER},
184 {"bolder", SP_CSS_FONT_WEIGHT_BOLDER},
185 {NULL, -1}
186 };
188 static SPStyleEnum const enum_font_stretch[] = {
189 {"ultra-condensed", SP_CSS_FONT_STRETCH_ULTRA_CONDENSED},
190 {"extra-condensed", SP_CSS_FONT_STRETCH_EXTRA_CONDENSED},
191 {"condensed", SP_CSS_FONT_STRETCH_CONDENSED},
192 {"semi-condensed", SP_CSS_FONT_STRETCH_SEMI_CONDENSED},
193 {"normal", SP_CSS_FONT_STRETCH_NORMAL},
194 {"semi-expanded", SP_CSS_FONT_STRETCH_SEMI_EXPANDED},
195 {"expanded", SP_CSS_FONT_STRETCH_EXPANDED},
196 {"extra-expanded", SP_CSS_FONT_STRETCH_EXTRA_EXPANDED},
197 {"ultra-expanded", SP_CSS_FONT_STRETCH_ULTRA_EXPANDED},
198 {"narrower", SP_CSS_FONT_STRETCH_NARROWER},
199 {"wider", SP_CSS_FONT_STRETCH_WIDER},
200 {NULL, -1}
201 };
203 static SPStyleEnum const enum_text_align[] = {
204 {"start", SP_CSS_TEXT_ALIGN_START},
205 {"end", SP_CSS_TEXT_ALIGN_END},
206 {"left", SP_CSS_TEXT_ALIGN_LEFT},
207 {"right", SP_CSS_TEXT_ALIGN_RIGHT},
208 {"center", SP_CSS_TEXT_ALIGN_CENTER},
209 {"justify", SP_CSS_TEXT_ALIGN_JUSTIFY},
210 {NULL, -1}
211 };
213 static SPStyleEnum const enum_text_transform[] = {
214 {"capitalize", SP_CSS_TEXT_TRANSFORM_CAPITALIZE},
215 {"uppercase", SP_CSS_TEXT_TRANSFORM_UPPERCASE},
216 {"lowercase", SP_CSS_TEXT_TRANSFORM_LOWERCASE},
217 {"none", SP_CSS_TEXT_TRANSFORM_NONE},
218 {NULL, -1}
219 };
221 static SPStyleEnum const enum_text_anchor[] = {
222 {"start", SP_CSS_TEXT_ANCHOR_START},
223 {"middle", SP_CSS_TEXT_ANCHOR_MIDDLE},
224 {"end", SP_CSS_TEXT_ANCHOR_END},
225 {NULL, -1}
226 };
228 static SPStyleEnum const enum_direction[] = {
229 {"ltr", SP_CSS_DIRECTION_LTR},
230 {"rtl", SP_CSS_DIRECTION_RTL},
231 {NULL, -1}
232 };
234 static SPStyleEnum const enum_block_progression[] = {
235 {"tb", SP_CSS_BLOCK_PROGRESSION_TB},
236 {"rl", SP_CSS_BLOCK_PROGRESSION_RL},
237 {"lr", SP_CSS_BLOCK_PROGRESSION_LR},
238 {NULL, -1}
239 };
241 static SPStyleEnum const enum_writing_mode[] = {
242 /* Note that using the same enumerator for lr as lr-tb means we write as lr-tb even if the
243 * input file said lr. We prefer writing lr-tb on the grounds that the spec says the initial
244 * value is lr-tb rather than lr.
245 *
246 * ECMA scripts may be surprised to find tb-rl in DOM if they set the attribute to rl, so
247 * sharing enumerators for different strings may be a bug (once we support ecma script).
248 */
249 {"lr-tb", SP_CSS_WRITING_MODE_LR_TB},
250 {"rl-tb", SP_CSS_WRITING_MODE_RL_TB},
251 {"tb-rl", SP_CSS_WRITING_MODE_TB_RL},
252 {"lr", SP_CSS_WRITING_MODE_LR_TB},
253 {"rl", SP_CSS_WRITING_MODE_RL_TB},
254 {"tb", SP_CSS_WRITING_MODE_TB_RL},
255 {NULL, -1}
256 };
258 static SPStyleEnum const enum_visibility[] = {
259 {"hidden", SP_CSS_VISIBILITY_HIDDEN},
260 {"collapse", SP_CSS_VISIBILITY_COLLAPSE},
261 {"visible", SP_CSS_VISIBILITY_VISIBLE},
262 {NULL, -1}
263 };
265 static SPStyleEnum const enum_overflow[] = {
266 {"visible", SP_CSS_OVERFLOW_VISIBLE},
267 {"hidden", SP_CSS_OVERFLOW_HIDDEN},
268 {"scroll", SP_CSS_OVERFLOW_SCROLL},
269 {"auto", SP_CSS_OVERFLOW_AUTO},
270 {NULL, -1}
271 };
273 static SPStyleEnum const enum_display[] = {
274 {"none", SP_CSS_DISPLAY_NONE},
275 {"inline", SP_CSS_DISPLAY_INLINE},
276 {"block", SP_CSS_DISPLAY_BLOCK},
277 {"list-item", SP_CSS_DISPLAY_LIST_ITEM},
278 {"run-in", SP_CSS_DISPLAY_RUN_IN},
279 {"compact", SP_CSS_DISPLAY_COMPACT},
280 {"marker", SP_CSS_DISPLAY_MARKER},
281 {"table", SP_CSS_DISPLAY_TABLE},
282 {"inline-table", SP_CSS_DISPLAY_INLINE_TABLE},
283 {"table-row-group", SP_CSS_DISPLAY_TABLE_ROW_GROUP},
284 {"table-header-group", SP_CSS_DISPLAY_TABLE_HEADER_GROUP},
285 {"table-footer-group", SP_CSS_DISPLAY_TABLE_FOOTER_GROUP},
286 {"table-row", SP_CSS_DISPLAY_TABLE_ROW},
287 {"table-column-group", SP_CSS_DISPLAY_TABLE_COLUMN_GROUP},
288 {"table-column", SP_CSS_DISPLAY_TABLE_COLUMN},
289 {"table-cell", SP_CSS_DISPLAY_TABLE_CELL},
290 {"table-caption", SP_CSS_DISPLAY_TABLE_CAPTION},
291 {NULL, -1}
292 };
294 static SPStyleEnum const enum_shape_rendering[] = {
295 {"auto", 0},
296 {"optimizeSpeed", 0},
297 {"crispEdges", 0},
298 {"geometricPrecision", 0},
299 {NULL, -1}
300 };
302 static SPStyleEnum const enum_color_rendering[] = {
303 {"auto", 0},
304 {"optimizeSpeed", 0},
305 {"optimizeQuality", 0},
306 {NULL, -1}
307 };
309 static SPStyleEnum const *const enum_image_rendering = enum_color_rendering;
311 static SPStyleEnum const enum_text_rendering[] = {
312 {"auto", 0},
313 {"optimizeSpeed", 0},
314 {"optimizeLegibility", 0},
315 {"geometricPrecision", 0},
316 {NULL, -1}
317 };
319 static SPStyleEnum const enum_enable_background[] = {
320 {"accumulate", SP_CSS_BACKGROUND_ACCUMULATE},
321 {"new", SP_CSS_BACKGROUND_NEW},
322 {NULL, -1}
323 };
325 /**
326 * Release callback.
327 */
328 static void
329 sp_style_object_release(SPObject *object, SPStyle *style)
330 {
331 style->object = NULL;
332 }
334 /**
335 * Emit style modified signal on style's object if the filter changed.
336 */
337 static void
338 sp_style_filter_ref_modified(SPObject *obj, guint flags, SPStyle *style)
339 {
340 SPFilter *filter=static_cast<SPFilter *>(obj);
341 if (style->getFilter() == filter)
342 {
343 if (style->object) {
344 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
345 }
346 }
347 }
349 /**
350 * Gets called when the filter is (re)attached to the style
351 */
352 static void
353 sp_style_filter_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
354 {
355 if (old_ref) {
356 style->filter_modified_connection.disconnect();
357 }
358 if ( SP_IS_FILTER(ref))
359 {
360 style->filter_modified_connection =
361 ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_filter_ref_modified), style));
362 }
364 sp_style_filter_ref_modified(ref, 0, style);
365 }
367 /**
368 * Emit style modified signal on style's object if server is style's fill
369 * or stroke paint server.
370 */
371 static void
372 sp_style_paint_server_ref_modified(SPObject *obj, guint flags, SPStyle *style)
373 {
374 SPPaintServer *server = static_cast<SPPaintServer *>(obj);
376 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
377 && style->getFillPaintServer() == server)
378 {
379 if (style->object) {
380 /** \todo
381 * fixme: I do not know, whether it is optimal - we are
382 * forcing reread of everything (Lauris)
383 */
384 /** \todo
385 * fixme: We have to use object_modified flag, because parent
386 * flag is only available downstreams.
387 */
388 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
389 }
390 } else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
391 && style->getStrokePaintServer() == server)
392 {
393 if (style->object) {
394 /// \todo fixme:
395 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
396 }
397 } else {
398 g_assert_not_reached();
399 }
400 }
402 /**
403 * Gets called when the paintserver is (re)attached to the style
404 */
405 static void
406 sp_style_fill_paint_server_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
407 {
408 if (old_ref) {
409 style->fill_ps_modified_connection.disconnect();
410 }
411 if (SP_IS_PAINT_SERVER(ref)) {
412 style->fill_ps_modified_connection =
413 ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_paint_server_ref_modified), style));
414 }
416 sp_style_paint_server_ref_modified(ref, 0, style);
417 }
419 /**
420 * Gets called when the paintserver is (re)attached to the style
421 */
422 static void
423 sp_style_stroke_paint_server_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
424 {
425 if (old_ref) {
426 style->stroke_ps_modified_connection.disconnect();
427 }
428 if (SP_IS_PAINT_SERVER(ref)) {
429 style->stroke_ps_modified_connection =
430 ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_paint_server_ref_modified), style));
431 }
433 sp_style_paint_server_ref_modified(ref, 0, style);
434 }
436 /**
437 * Returns a new SPStyle object with settings as per sp_style_clear().
438 */
439 SPStyle *
440 sp_style_new(SPDocument *document)
441 {
442 SPStyle *const style = g_new0(SPStyle, 1);
444 style->refcount = 1;
445 style->object = NULL;
446 style->document = document;
447 style->text = sp_text_style_new();
448 style->text_private = TRUE;
450 sp_style_clear(style);
452 style->cloned = false;
454 new (&style->release_connection) sigc::connection();
455 new (&style->filter_modified_connection) sigc::connection();
456 new (&style->fill_ps_modified_connection) sigc::connection();
457 new (&style->stroke_ps_modified_connection) sigc::connection();
459 return style;
460 }
463 /**
464 * Creates a new SPStyle object, and attaches it to the specified SPObject.
465 */
466 SPStyle *
467 sp_style_new_from_object(SPObject *object)
468 {
469 g_return_val_if_fail(object != NULL, NULL);
470 g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
472 SPStyle *style = sp_style_new(SP_OBJECT_DOCUMENT(object));
473 style->object = object;
474 style->release_connection = object->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_object_release), style));
476 if (object && SP_OBJECT_IS_CLONED(object)) {
477 style->cloned = true;
478 }
480 return style;
481 }
484 /**
485 * Increase refcount of style.
486 */
487 SPStyle *
488 sp_style_ref(SPStyle *style)
489 {
490 g_return_val_if_fail(style != NULL, NULL);
491 g_return_val_if_fail(style->refcount > 0, NULL);
493 style->refcount += 1;
495 return style;
496 }
499 /**
500 * Decrease refcount of style with possible destruction.
501 */
502 SPStyle *
503 sp_style_unref(SPStyle *style)
504 {
505 g_return_val_if_fail(style != NULL, NULL);
506 g_return_val_if_fail(style->refcount > 0, NULL);
508 style->refcount -= 1;
510 if (style->refcount < 1) {
511 style->release_connection.disconnect();
512 style->release_connection.~connection();
513 if (style->text) sp_text_style_unref(style->text);
515 if (style->fill.value.href) {
516 style->fill_ps_modified_connection.disconnect();
517 delete style->fill.value.href;
518 style->fill.value.href = NULL;
519 }
520 if (style->stroke.value.href) {
521 style->stroke_ps_modified_connection.disconnect();
522 delete style->stroke.value.href;
523 style->stroke.value.href = NULL;
524 }
525 if (style->filter.href) {
526 style->filter_modified_connection.disconnect();
527 delete style->filter.href;
528 style->filter.href = NULL;
529 }
531 style->filter_modified_connection.~connection();
532 style->fill_ps_modified_connection.~connection();
533 style->stroke_ps_modified_connection.~connection();
535 sp_style_paint_clear(style, &style->fill);
536 sp_style_paint_clear(style, &style->stroke);
537 sp_style_filter_clear(style);
539 g_free(style->stroke_dash.dash);
540 g_free(style);
541 }
543 return NULL;
544 }
546 /**
547 * Reads the various style parameters for an object from repr.
548 */
549 static void
550 sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
551 {
552 g_assert(style != NULL);
553 g_assert(repr != NULL);
554 g_assert(!object || (SP_OBJECT_REPR(object) == repr));
556 sp_style_clear(style);
558 if (object && SP_OBJECT_IS_CLONED(object)) {
559 style->cloned = true;
560 }
562 /* 1. Style attribute */
563 gchar const *val = repr->attribute("style");
564 if (val != NULL) {
565 sp_style_merge_from_style_string(style, val);
566 }
568 if (object) {
569 sp_style_merge_from_object_stylesheet(style, object);
570 } else {
571 /** \todo No stylesheet information. Find out under what circumstances
572 * this occurs, and handle accordingly. (If we really wanted to, we
573 * could probably get stylesheets by going through repr->doc.)
574 */
575 }
577 /* 2. Presentation attributes */
578 /* CSS2 */
579 SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true);
580 SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true);
581 SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true);
582 /* Font */
583 SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size");
584 SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true);
585 SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true);
586 SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true);
587 SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true);
588 /* Text (css2 chapter 16) */
589 SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent");
590 SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true);
591 if (!style->text_decoration.set) {
592 val = repr->attribute("text-decoration");
593 if (val) {
594 sp_style_read_itextdecoration(&style->text_decoration, val);
595 }
596 }
597 if (!style->line_height.set) {
598 val = repr->attribute("line-height");
599 if (val) {
600 sp_style_read_ilengthornormal(&style->line_height, val);
601 }
602 }
603 if (!style->letter_spacing.set) {
604 val = repr->attribute("letter-spacing");
605 if (val) {
606 sp_style_read_ilengthornormal(&style->letter_spacing, val);
607 }
608 }
609 if (!style->word_spacing.set) {
610 val = repr->attribute("word-spacing");
611 if (val) {
612 sp_style_read_ilengthornormal(&style->word_spacing, val);
613 }
614 }
615 SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true);
616 SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true);
617 SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true);
619 /* SVG */
620 SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode",
621 enum_writing_mode, true);
622 SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor",
623 enum_text_anchor, true);
625 /* opacity */
626 if (!style->opacity.set) {
627 val = repr->attribute("opacity");
628 if (val) {
629 sp_style_read_iscale24(&style->opacity, val);
630 }
631 }
632 /* color */
633 if (!style->color.set) {
634 val = repr->attribute("color");
635 if (val) {
636 sp_style_read_icolor(&style->color, val, style, ( object
637 ? SP_OBJECT_DOCUMENT(object)
638 : NULL ));
639 }
640 }
641 /* fill */
642 if (!style->fill.set) {
643 val = repr->attribute("fill");
644 if (val) {
645 sp_style_read_ipaint(&style->fill, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
646 }
647 }
648 /* fill-opacity */
649 if (!style->fill_opacity.set) {
650 val = repr->attribute("fill-opacity");
651 if (val) {
652 sp_style_read_iscale24(&style->fill_opacity, val);
653 }
654 }
655 /* fill-rule */
656 SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true);
657 /* stroke */
658 if (!style->stroke.set) {
659 val = repr->attribute("stroke");
660 if (val) {
661 sp_style_read_ipaint(&style->stroke, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
662 }
663 }
664 SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width");
665 SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true);
666 SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true);
667 SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit");
669 /* markers */
670 if (!style->marker[SP_MARKER_LOC].set) {
671 val = repr->attribute("marker");
672 if (val) {
673 sp_style_read_istring(&style->marker[SP_MARKER_LOC], val);
674 }
675 }
676 if (!style->marker[SP_MARKER_LOC_START].set) {
677 val = repr->attribute("marker-start");
678 if (val) {
679 sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val);
680 }
681 }
682 if (!style->marker[SP_MARKER_LOC_MID].set) {
683 val = repr->attribute("marker-mid");
684 if (val) {
685 sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val);
686 }
687 }
688 if (!style->marker[SP_MARKER_LOC_END].set) {
689 val = repr->attribute("marker-end");
690 if (val) {
691 sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val);
692 }
693 }
695 /* stroke-opacity */
696 if (!style->stroke_opacity.set) {
697 val = repr->attribute("stroke-opacity");
698 if (val) {
699 sp_style_read_iscale24(&style->stroke_opacity, val);
700 }
701 }
702 if (!style->stroke_dasharray_set) {
703 val = repr->attribute("stroke-dasharray");
704 if (val) {
705 sp_style_read_dash(style, val);
706 }
707 }
708 if (!style->stroke_dashoffset_set) {
709 /* fixme */
710 val = repr->attribute("stroke-dashoffset");
711 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
712 style->stroke_dashoffset_set = TRUE;
713 } else {
714 style->stroke_dashoffset_set = FALSE;
715 }
716 }
718 /* font-family */
719 if (!style->text_private || !style->text->font_family.set) {
720 val = repr->attribute("font-family");
721 if (val) {
722 if (!style->text_private) sp_style_privatize_text(style);
723 gchar *val_unquoted = attribute_unquote(val);
724 sp_style_read_istring(&style->text->font_family, val_unquoted);
725 if (val_unquoted) g_free (val_unquoted);
726 }
727 }
729 /* filter effects */
730 if (!style->filter.set) {
731 val = repr->attribute("filter");
732 if (val) {
733 sp_style_read_ifilter(val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
734 }
735 }
736 SPS_READ_PENUM_IF_UNSET(&style->enable_background, repr,
737 "enable-background", enum_enable_background, true);
739 /* 3. Merge from parent */
740 if (object) {
741 if (object->parent) {
742 sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent));
743 }
744 } else {
745 if (sp_repr_parent(repr)) {
746 /// \todo fixme: This is not the prettiest thing (Lauris)
747 SPStyle *parent = sp_style_new(NULL);
748 sp_style_read(parent, NULL, sp_repr_parent(repr));
749 sp_style_merge_from_parent(style, parent);
750 sp_style_unref(parent);
751 }
752 }
753 }
756 /**
757 * Read style properties from object's repr.
758 *
759 * 1. Reset existing object style
760 * 2. Load current effective object style
761 * 3. Load i attributes from immediate parent (which has to be up-to-date)
762 */
763 void
764 sp_style_read_from_object(SPStyle *style, SPObject *object)
765 {
766 g_return_if_fail(style != NULL);
767 g_return_if_fail(object != NULL);
768 g_return_if_fail(SP_IS_OBJECT(object));
770 Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
771 g_return_if_fail(repr != NULL);
773 sp_style_read(style, object, repr);
774 }
777 /**
778 * Read style properties from repr only.
779 */
780 void
781 sp_style_read_from_repr(SPStyle *style, Inkscape::XML::Node *repr)
782 {
783 g_return_if_fail(style != NULL);
784 g_return_if_fail(repr != NULL);
786 sp_style_read(style, NULL, repr);
787 }
791 /**
792 *
793 */
794 static void
795 sp_style_privatize_text(SPStyle *style)
796 {
797 SPTextStyle *text = style->text;
798 style->text = sp_text_style_duplicate_unset(style->text);
799 sp_text_style_unref(text);
800 style->text_private = TRUE;
801 }
804 /**
805 * Merge property into style.
806 *
807 * Should be called in order of highest to lowest precedence.
808 * E.g. for a single style string, call from the last declaration to the first,
809 * as CSS says that later declarations override earlier ones.
810 *
811 * \pre val != NULL.
812 */
813 static void
814 sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
815 {
816 g_return_if_fail(val != NULL);
818 switch (id) {
819 /* CSS2 */
820 /* Font */
821 case SP_PROP_FONT_FAMILY:
822 if (!style->text_private) sp_style_privatize_text(style);
823 if (!style->text->font_family.set) {
824 gchar *val_unquoted = attribute_unquote(val);
825 sp_style_read_istring(&style->text->font_family, val_unquoted);
826 if (val_unquoted) g_free (val_unquoted);
827 }
828 break;
829 case SP_PROP_FONT_SIZE:
830 SPS_READ_IFONTSIZE_IF_UNSET(&style->font_size, val);
831 break;
832 case SP_PROP_FONT_SIZE_ADJUST:
833 if (strcmp(val, "none") != 0) {
834 g_warning("Unimplemented style property id SP_PROP_FONT_SIZE_ADJUST: value: %s", val);
835 }
836 break;
837 case SP_PROP_FONT_STYLE:
838 SPS_READ_IENUM_IF_UNSET(&style->font_style, val, enum_font_style, true);
839 break;
840 case SP_PROP_FONT_VARIANT:
841 SPS_READ_IENUM_IF_UNSET(&style->font_variant, val, enum_font_variant, true);
842 break;
843 case SP_PROP_FONT_WEIGHT:
844 SPS_READ_IENUM_IF_UNSET(&style->font_weight, val, enum_font_weight, true);
845 break;
846 case SP_PROP_FONT_STRETCH:
847 SPS_READ_IENUM_IF_UNSET(&style->font_stretch, val, enum_font_stretch, true);
848 break;
849 case SP_PROP_FONT:
850 if (!style->text_private) sp_style_privatize_text(style);
851 if (!style->text->font.set) {
852 g_free(style->text->font.value);
853 style->text->font.value = g_strdup(val);
854 style->text->font.set = TRUE;
855 style->text->font.inherit = (val && !strcmp(val, "inherit"));
856 }
857 break;
858 /* Text */
859 case SP_PROP_TEXT_INDENT:
860 SPS_READ_ILENGTH_IF_UNSET(&style->text_indent, val);
861 break;
862 case SP_PROP_TEXT_ALIGN:
863 SPS_READ_IENUM_IF_UNSET(&style->text_align, val, enum_text_align, true);
864 break;
865 case SP_PROP_TEXT_DECORATION:
866 if (!style->text_decoration.set) {
867 sp_style_read_itextdecoration(&style->text_decoration, val);
868 }
869 break;
870 case SP_PROP_LINE_HEIGHT:
871 if (!style->line_height.set) {
872 sp_style_read_ilengthornormal(&style->line_height, val);
873 }
874 break;
875 case SP_PROP_LETTER_SPACING:
876 if (!style->letter_spacing.set) {
877 sp_style_read_ilengthornormal(&style->letter_spacing, val);
878 }
879 break;
880 case SP_PROP_WORD_SPACING:
881 if (!style->word_spacing.set) {
882 sp_style_read_ilengthornormal(&style->word_spacing, val);
883 }
884 break;
885 case SP_PROP_TEXT_TRANSFORM:
886 SPS_READ_IENUM_IF_UNSET(&style->text_transform, val, enum_text_transform, true);
887 break;
888 /* Text (css3) */
889 case SP_PROP_DIRECTION:
890 SPS_READ_IENUM_IF_UNSET(&style->direction, val, enum_direction, true);
891 break;
892 case SP_PROP_BLOCK_PROGRESSION:
893 SPS_READ_IENUM_IF_UNSET(&style->block_progression, val, enum_block_progression, true);
894 break;
895 case SP_PROP_WRITING_MODE:
896 SPS_READ_IENUM_IF_UNSET(&style->writing_mode, val, enum_writing_mode, true);
897 break;
898 case SP_PROP_TEXT_ANCHOR:
899 SPS_READ_IENUM_IF_UNSET(&style->text_anchor, val, enum_text_anchor, true);
900 break;
901 /* Text (unimplemented) */
902 case SP_PROP_TEXT_RENDERING: {
903 /* Ignore the hint. */
904 SPIEnum dummy;
905 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_text_rendering, true);
906 break;
907 }
908 case SP_PROP_ALIGNMENT_BASELINE:
909 g_warning("Unimplemented style property SP_PROP_ALIGNMENT_BASELINE: value: %s", val);
910 break;
911 case SP_PROP_BASELINE_SHIFT:
912 g_warning("Unimplemented style property SP_PROP_BASELINE_SHIFT: value: %s", val);
913 break;
914 case SP_PROP_DOMINANT_BASELINE:
915 g_warning("Unimplemented style property SP_PROP_DOMINANT_BASELINE: value: %s", val);
916 break;
917 case SP_PROP_GLYPH_ORIENTATION_HORIZONTAL:
918 g_warning("Unimplemented style property SP_PROP_ORIENTATION_HORIZONTAL: value: %s", val);
919 break;
920 case SP_PROP_GLYPH_ORIENTATION_VERTICAL:
921 g_warning("Unimplemented style property SP_PROP_ORIENTATION_VERTICAL: value: %s", val);
922 break;
923 case SP_PROP_KERNING:
924 g_warning("Unimplemented style property SP_PROP_KERNING: value: %s", val);
925 break;
926 /* Misc */
927 case SP_PROP_CLIP:
928 g_warning("Unimplemented style property SP_PROP_CLIP: value: %s", val);
929 break;
930 case SP_PROP_COLOR:
931 if (!style->color.set) {
932 sp_style_read_icolor(&style->color, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
933 }
934 break;
935 case SP_PROP_CURSOR:
936 g_warning("Unimplemented style property SP_PROP_CURSOR: value: %s", val);
937 break;
938 case SP_PROP_DISPLAY:
939 SPS_READ_IENUM_IF_UNSET(&style->display, val, enum_display, true);
940 break;
941 case SP_PROP_OVERFLOW:
942 /** \todo
943 * FIXME: not supported properly yet, we just read and write it,
944 * but act as if it is always "display".
945 */
946 SPS_READ_IENUM_IF_UNSET(&style->overflow, val, enum_overflow, true);
947 break;
948 case SP_PROP_VISIBILITY:
949 SPS_READ_IENUM_IF_UNSET(&style->visibility, val, enum_visibility, true);
950 break;
951 /* SVG */
952 /* Clip/Mask */
953 case SP_PROP_CLIP_PATH:
954 g_warning("Unimplemented style property SP_PROP_CLIP_PATH: value: %s", val);
955 break;
956 case SP_PROP_CLIP_RULE:
957 g_warning("Unimplemented style property SP_PROP_CLIP_RULE: value: %s", val);
958 break;
959 case SP_PROP_MASK:
960 g_warning("Unimplemented style property SP_PROP_MASK: value: %s", val);
961 break;
962 case SP_PROP_OPACITY:
963 if (!style->opacity.set) {
964 sp_style_read_iscale24(&style->opacity, val);
965 }
966 break;
967 case SP_PROP_ENABLE_BACKGROUND:
968 SPS_READ_IENUM_IF_UNSET(&style->enable_background, val,
969 enum_enable_background, true);
970 break;
971 /* Filter */
972 case SP_PROP_FILTER:
973 if (!style->filter.set && !style->filter.inherit) {
974 sp_style_read_ifilter(val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
975 }
976 break;
977 case SP_PROP_FLOOD_COLOR:
978 g_warning("Unimplemented style property SP_PROP_FLOOD_COLOR: value: %s", val);
979 break;
980 case SP_PROP_FLOOD_OPACITY:
981 g_warning("Unimplemented style property SP_PROP_FLOOD_OPACITY: value: %s", val);
982 break;
983 case SP_PROP_LIGHTING_COLOR:
984 g_warning("Unimplemented style property SP_PROP_LIGHTING_COLOR: value: %s", val);
985 break;
986 /* Gradient */
987 case SP_PROP_STOP_COLOR:
988 g_warning("Unimplemented style property SP_PROP_STOP_COLOR: value: %s", val);
989 break;
990 case SP_PROP_STOP_OPACITY:
991 g_warning("Unimplemented style property SP_PROP_STOP_OPACITY: value: %s", val);
992 break;
993 /* Interactivity */
994 case SP_PROP_POINTER_EVENTS:
995 g_warning("Unimplemented style property SP_PROP_POINTER_EVENTS: value: %s", val);
996 break;
997 /* Paint */
998 case SP_PROP_COLOR_INTERPOLATION:
999 g_warning("Unimplemented style property SP_PROP_COLOR_INTERPOLATION: value: %s", val);
1000 break;
1001 case SP_PROP_COLOR_INTERPOLATION_FILTERS:
1002 g_warning("Unimplemented style property SP_PROP_INTERPOLATION_FILTERS: value: %s", val);
1003 break;
1004 case SP_PROP_COLOR_PROFILE:
1005 g_warning("Unimplemented style property SP_PROP_COLOR_PROFILE: value: %s", val);
1006 break;
1007 case SP_PROP_COLOR_RENDERING: {
1008 /* Ignore the hint. */
1009 SPIEnum dummy;
1010 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_color_rendering, true);
1011 break;
1012 }
1013 case SP_PROP_FILL:
1014 if (!style->fill.set) {
1015 sp_style_read_ipaint(&style->fill, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
1016 }
1017 break;
1018 case SP_PROP_FILL_OPACITY:
1019 if (!style->fill_opacity.set) {
1020 sp_style_read_iscale24(&style->fill_opacity, val);
1021 }
1022 break;
1023 case SP_PROP_FILL_RULE:
1024 if (!style->fill_rule.set) {
1025 sp_style_read_ienum(&style->fill_rule, val, enum_fill_rule, true);
1026 }
1027 break;
1028 case SP_PROP_IMAGE_RENDERING: {
1029 /* Ignore the hint. */
1030 SPIEnum dummy;
1031 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_image_rendering, true);
1032 break;
1033 }
1034 case SP_PROP_MARKER:
1035 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1036 /* style->marker[SP_MARKER_LOC] = g_quark_from_string(val); */
1037 if (!style->marker[SP_MARKER_LOC].set) {
1038 g_free(style->marker[SP_MARKER_LOC].value);
1039 style->marker[SP_MARKER_LOC].value = g_strdup(val);
1040 style->marker[SP_MARKER_LOC].set = TRUE;
1041 style->marker[SP_MARKER_LOC].inherit = (val && !strcmp(val, "inherit"));
1042 }
1043 break;
1045 case SP_PROP_MARKER_START:
1046 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1047 if (!style->marker[SP_MARKER_LOC_START].set) {
1048 g_free(style->marker[SP_MARKER_LOC_START].value);
1049 style->marker[SP_MARKER_LOC_START].value = g_strdup(val);
1050 style->marker[SP_MARKER_LOC_START].set = TRUE;
1051 style->marker[SP_MARKER_LOC_START].inherit = (val && !strcmp(val, "inherit"));
1052 }
1053 break;
1054 case SP_PROP_MARKER_MID:
1055 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1056 if (!style->marker[SP_MARKER_LOC_MID].set) {
1057 g_free(style->marker[SP_MARKER_LOC_MID].value);
1058 style->marker[SP_MARKER_LOC_MID].value = g_strdup(val);
1059 style->marker[SP_MARKER_LOC_MID].set = TRUE;
1060 style->marker[SP_MARKER_LOC_MID].inherit = (val && !strcmp(val, "inherit"));
1061 }
1062 break;
1063 case SP_PROP_MARKER_END:
1064 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1065 if (!style->marker[SP_MARKER_LOC_END].set) {
1066 g_free(style->marker[SP_MARKER_LOC_END].value);
1067 style->marker[SP_MARKER_LOC_END].value = g_strdup(val);
1068 style->marker[SP_MARKER_LOC_END].set = TRUE;
1069 style->marker[SP_MARKER_LOC_END].inherit = (val && !strcmp(val, "inherit"));
1070 }
1071 break;
1073 case SP_PROP_SHAPE_RENDERING: {
1074 /* Ignore the hint. */
1075 SPIEnum dummy;
1076 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_shape_rendering, true);
1077 break;
1078 }
1080 case SP_PROP_STROKE:
1081 if (!style->stroke.set) {
1082 sp_style_read_ipaint(&style->stroke, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
1083 }
1084 break;
1085 case SP_PROP_STROKE_WIDTH:
1086 SPS_READ_ILENGTH_IF_UNSET(&style->stroke_width, val);
1087 break;
1088 case SP_PROP_STROKE_DASHARRAY:
1089 if (!style->stroke_dasharray_set) {
1090 sp_style_read_dash(style, val);
1091 }
1092 break;
1093 case SP_PROP_STROKE_DASHOFFSET:
1094 if (!style->stroke_dashoffset_set) {
1095 /* fixme */
1096 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
1097 style->stroke_dashoffset_set = TRUE;
1098 } else {
1099 style->stroke_dashoffset_set = FALSE;
1100 }
1101 }
1102 break;
1103 case SP_PROP_STROKE_LINECAP:
1104 if (!style->stroke_linecap.set) {
1105 sp_style_read_ienum(&style->stroke_linecap, val, enum_stroke_linecap, true);
1106 }
1107 break;
1108 case SP_PROP_STROKE_LINEJOIN:
1109 if (!style->stroke_linejoin.set) {
1110 sp_style_read_ienum(&style->stroke_linejoin, val, enum_stroke_linejoin, true);
1111 }
1112 break;
1113 case SP_PROP_STROKE_MITERLIMIT:
1114 if (!style->stroke_miterlimit.set) {
1115 sp_style_read_ifloat(&style->stroke_miterlimit, val);
1116 }
1117 break;
1118 case SP_PROP_STROKE_OPACITY:
1119 if (!style->stroke_opacity.set) {
1120 sp_style_read_iscale24(&style->stroke_opacity, val);
1121 }
1122 break;
1124 default:
1125 g_warning("Invalid style property id: %d value: %s", id, val);
1126 break;
1127 }
1128 }
1130 static void
1131 sp_style_merge_style_from_decl(SPStyle *const style, CRDeclaration const *const decl)
1132 {
1133 /** \todo Ensure that property is lcased, as per
1134 * http://www.w3.org/TR/REC-CSS2/syndata.html#q4.
1135 * Should probably be done in libcroco.
1136 */
1137 unsigned const prop_idx = sp_attribute_lookup(decl->property->stryng->str);
1138 if (prop_idx != SP_ATTR_INVALID) {
1139 /** \todo
1140 * effic: Test whether the property is already set before trying to
1141 * convert to string. Alternatively, set from CRTerm directly rather
1142 * than converting to string.
1143 */
1144 guchar *const str_value_unsigned = cr_term_to_string(decl->value);
1145 gchar *const str_value = reinterpret_cast<gchar *>(str_value_unsigned);
1146 sp_style_merge_property(style, prop_idx, str_value);
1147 g_free(str_value);
1148 }
1149 }
1151 static void
1152 sp_style_merge_from_props(SPStyle *const style, CRPropList *const props)
1153 {
1154 #if 0 /* forwards */
1155 for (CRPropList const *cur = props; cur; cur = cr_prop_list_get_next(cur)) {
1156 CRDeclaration *decl = NULL;
1157 cr_prop_list_get_decl(cur, &decl);
1158 sp_style_merge_style_from_decl(style, decl);
1159 }
1160 #else /* in reverse order, as we need later declarations to take precedence over earlier ones. */
1161 if (props) {
1162 sp_style_merge_from_props(style, cr_prop_list_get_next(props));
1163 CRDeclaration *decl = NULL;
1164 cr_prop_list_get_decl(props, &decl);
1165 sp_style_merge_style_from_decl(style, decl);
1166 }
1167 #endif
1168 }
1170 /**
1171 * \pre decl_list != NULL
1172 */
1173 static void
1174 sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list)
1175 {
1176 // read the decls from end to start, using head recursion, so that latter declarations override
1177 // (Ref: http://www.w3.org/TR/REC-CSS2/cascade.html#cascading-order point 4.)
1178 // because sp_style_merge_style_from_decl only sets properties that are unset
1179 if (decl_list->next) {
1180 sp_style_merge_from_decl_list(style, decl_list->next);
1181 }
1182 sp_style_merge_style_from_decl(style, decl_list);
1183 }
1185 static CRSelEng *
1186 sp_repr_sel_eng()
1187 {
1188 CRSelEng *const ret = cr_sel_eng_new();
1189 cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface);
1191 /** \todo
1192 * Check whether we need to register any pseudo-class handlers.
1193 * libcroco has its own default handlers for first-child and lang.
1194 *
1195 * We probably want handlers for link and arguably visited (though
1196 * inkscape can't visit links at the time of writing). hover etc.
1197 * more useful in inkview than the editor inkscape.
1198 *
1199 * http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that
1200 * the following should be honoured, at least by inkview:
1201 * :hover, :active, :focus, :visited, :link.
1202 */
1204 g_assert(ret);
1205 return ret;
1206 }
1208 static void
1209 sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object)
1210 {
1211 static CRSelEng *sel_eng = NULL;
1212 if (!sel_eng) {
1213 sel_eng = sp_repr_sel_eng();
1214 }
1216 CRPropList *props = NULL;
1217 CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng,
1218 object->document->style_cascade,
1219 object->repr,
1220 &props);
1221 g_return_if_fail(status == CR_OK);
1222 /// \todo Check what errors can occur, and handle them properly.
1223 if (props) {
1224 sp_style_merge_from_props(style, props);
1225 cr_prop_list_destroy(props);
1226 }
1227 }
1229 /**
1230 * Parses a style="..." string and merges it with an existing SPStyle.
1231 */
1232 void
1233 sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p)
1234 {
1235 /*
1236 * Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute:
1237 * ``When CSS styling is used, CSS inline style is specified by including
1238 * semicolon-separated property declarations of the form "name : value"
1239 * within the style attribute''.
1240 *
1241 * That's fairly ambiguous. Is a `value' allowed to contain semicolons?
1242 * Why does it say "including", what else is allowed in the style
1243 * attribute value?
1244 */
1246 CRDeclaration *const decl_list
1247 = cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8);
1248 if (decl_list) {
1249 sp_style_merge_from_decl_list(style, decl_list);
1250 cr_declaration_destroy(decl_list);
1251 }
1252 }
1254 /** Indexed by SP_CSS_FONT_SIZE_blah. */
1255 static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0};
1257 static void
1258 sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent)
1259 {
1260 /* 'font-size' */
1261 if (!child.set || child.inherit) {
1262 /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
1263 child.computed = parent.computed;
1264 } else if (child.type == SP_FONT_SIZE_LITERAL) {
1265 /** \todo
1266 * fixme: SVG and CSS do not specify clearly, whether we should use
1267 * user or screen coordinates (Lauris)
1268 */
1269 if (child.value < SP_CSS_FONT_SIZE_SMALLER) {
1270 child.computed = font_size_table[child.value];
1271 } else if (child.value == SP_CSS_FONT_SIZE_SMALLER) {
1272 child.computed = parent.computed / 1.2;
1273 } else if (child.value == SP_CSS_FONT_SIZE_LARGER) {
1274 child.computed = parent.computed * 1.2;
1275 } else {
1276 /* Illegal value */
1277 }
1278 } else if (child.type == SP_FONT_SIZE_PERCENTAGE) {
1279 /* Unlike most other lengths, percentage for font size is relative to parent computed value
1280 * rather than viewport. */
1281 child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value);
1282 }
1283 }
1285 /**
1286 * Sets computed values in \a style, which may involve inheriting from (or in some other way
1287 * calculating from) corresponding computed values of \a parent.
1288 *
1289 * References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default.
1290 * http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to
1291 * inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise
1292 * about what the computed value is (not obvious for lengths).
1293 *
1294 * \pre \a parent's computed values are already up-to-date.
1295 */
1296 void
1297 sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent)
1298 {
1299 g_return_if_fail(style != NULL);
1301 /** \todo
1302 * fixme: Check for existing callers that might pass null parent.
1303 * This should probably be g_return_if_fail, or else we should make a
1304 * best attempt to set computed values correctly without having a parent
1305 * (i.e., by assuming parent has initial values).
1306 */
1307 if (!parent)
1308 return;
1310 /* CSS2 */
1311 /* Font */
1312 sp_style_merge_font_size_from_parent(style->font_size, parent->font_size);
1314 /* 'font-style' */
1315 if (!style->font_style.set || style->font_style.inherit) {
1316 style->font_style.computed = parent->font_style.computed;
1317 }
1319 /* 'font-variant' */
1320 if (!style->font_variant.set || style->font_variant.inherit) {
1321 style->font_variant.computed = parent->font_variant.computed;
1322 }
1324 /* 'font-weight' */
1325 if (!style->font_weight.set || style->font_weight.inherit) {
1326 style->font_weight.computed = parent->font_weight.computed;
1327 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) {
1328 /** \todo
1329 * fixme: This is unconditional, i.e., happens even if parent not
1330 * present.
1331 */
1332 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
1333 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) {
1334 style->font_weight.computed = SP_CSS_FONT_WEIGHT_700;
1335 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) {
1336 unsigned const parent_val = parent->font_weight.computed;
1337 g_assert(SP_CSS_FONT_WEIGHT_100 == 0);
1338 // strictly, 'bolder' and 'lighter' should go to the next weight
1339 // expressible in the current font family, but that's difficult to
1340 // find out, so jumping by 3 seems an appropriate approximation
1341 style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3
1342 ? (unsigned)SP_CSS_FONT_WEIGHT_100
1343 : parent_val - 3);
1344 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1345 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) {
1346 unsigned const parent_val = parent->font_weight.computed;
1347 g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900);
1348 style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3
1349 ? (unsigned)SP_CSS_FONT_WEIGHT_900
1350 : parent_val + 3);
1351 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1352 }
1354 /* 'font-stretch' */
1355 if (!style->font_stretch.set || style->font_stretch.inherit) {
1356 style->font_stretch.computed = parent->font_stretch.computed;
1357 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) {
1358 unsigned const parent_val = parent->font_stretch.computed;
1359 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED
1360 ? parent_val
1361 : parent_val - 1);
1362 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1363 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) {
1364 unsigned const parent_val = parent->font_stretch.computed;
1365 g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1366 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED
1367 ? parent_val
1368 : parent_val + 1);
1369 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1370 }
1372 /* text (css2) */
1373 if (!style->text_indent.set || style->text_indent.inherit) {
1374 style->text_indent.computed = parent->text_indent.computed;
1375 }
1377 if (!style->text_align.set || style->text_align.inherit) {
1378 style->text_align.computed = parent->text_align.computed;
1379 }
1381 if (!style->text_decoration.set || style->text_decoration.inherit) {
1382 style->text_decoration.underline = parent->text_decoration.underline;
1383 style->text_decoration.overline = parent->text_decoration.overline;
1384 style->text_decoration.line_through = parent->text_decoration.line_through;
1385 style->text_decoration.blink = parent->text_decoration.blink;
1386 }
1388 if (!style->line_height.set || style->line_height.inherit) {
1389 style->line_height.computed = parent->line_height.computed;
1390 style->line_height.normal = parent->line_height.normal;
1391 }
1393 if (!style->letter_spacing.set || style->letter_spacing.inherit) {
1394 style->letter_spacing.computed = parent->letter_spacing.computed;
1395 style->letter_spacing.normal = parent->letter_spacing.normal;
1396 }
1398 if (!style->word_spacing.set || style->word_spacing.inherit) {
1399 style->word_spacing.computed = parent->word_spacing.computed;
1400 style->word_spacing.normal = parent->word_spacing.normal;
1401 }
1403 if (!style->text_transform.set || style->text_transform.inherit) {
1404 style->text_transform.computed = parent->text_transform.computed;
1405 }
1407 if (!style->direction.set || style->direction.inherit) {
1408 style->direction.computed = parent->direction.computed;
1409 }
1411 if (!style->block_progression.set || style->block_progression.inherit) {
1412 style->block_progression.computed = parent->block_progression.computed;
1413 }
1415 if (!style->writing_mode.set || style->writing_mode.inherit) {
1416 style->writing_mode.computed = parent->writing_mode.computed;
1417 }
1419 if (!style->text_anchor.set || style->text_anchor.inherit) {
1420 style->text_anchor.computed = parent->text_anchor.computed;
1421 }
1423 if (style->opacity.inherit) {
1424 style->opacity.value = parent->opacity.value;
1425 }
1427 /* Color */
1428 if (!style->color.set || style->color.inherit) {
1429 sp_style_merge_ipaint(style, &style->color, &parent->color);
1430 }
1432 /* Fill */
1433 if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) {
1434 sp_style_merge_ipaint(style, &style->fill, &parent->fill);
1435 }
1437 if (!style->fill_opacity.set || style->fill_opacity.inherit) {
1438 style->fill_opacity.value = parent->fill_opacity.value;
1439 }
1441 if (!style->fill_rule.set || style->fill_rule.inherit) {
1442 style->fill_rule.computed = parent->fill_rule.computed;
1443 }
1445 /* Stroke */
1446 if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) {
1447 sp_style_merge_ipaint(style, &style->stroke, &parent->stroke);
1448 }
1450 if (!style->stroke_width.set || style->stroke_width.inherit) {
1451 style->stroke_width.computed = parent->stroke_width.computed;
1452 } else {
1453 /* Update computed value for any change in font inherited from parent. */
1454 double const em = style->font_size.computed;
1455 if (style->stroke_width.unit == SP_CSS_UNIT_EM) {
1456 style->stroke_width.computed = style->stroke_width.value * em;
1457 } else if (style->stroke_width.unit == SP_CSS_UNIT_EX) {
1458 double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango.
1459 style->stroke_width.computed = style->stroke_width.value * ex;
1460 }
1461 }
1463 if (!style->stroke_linecap.set || style->stroke_linecap.inherit) {
1464 style->stroke_linecap.computed = parent->stroke_linecap.computed;
1465 }
1467 if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) {
1468 style->stroke_linejoin.computed = parent->stroke_linejoin.computed;
1469 }
1471 if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) {
1472 style->stroke_miterlimit.value = parent->stroke_miterlimit.value;
1473 }
1475 if (!style->stroke_dasharray_set && parent->stroke_dasharray_set) {
1476 /** \todo
1477 * This code looks wrong. Why does the logic differ from the
1478 * above properties? Similarly dashoffset below.
1479 */
1480 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1481 if (style->stroke_dash.n_dash > 0) {
1482 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1483 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1484 }
1485 }
1487 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1488 style->stroke_dash.offset = parent->stroke_dash.offset;
1489 }
1491 if (!style->stroke_opacity.set || style->stroke_opacity.inherit) {
1492 style->stroke_opacity.value = parent->stroke_opacity.value;
1493 }
1495 if (style->text && parent->text) {
1496 if (!style->text->font_family.set || style->text->font_family.inherit) {
1497 g_free(style->text->font_family.value);
1498 style->text->font_family.value = g_strdup(parent->text->font_family.value);
1499 }
1500 }
1502 /* Markers - Free the old value and make copy of the new */
1503 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1504 if (!style->marker[i].set || style->marker[i].inherit) {
1505 g_free(style->marker[i].value);
1506 style->marker[i].value = g_strdup(parent->marker[i].value);
1507 }
1508 }
1510 /* Filter effects */
1511 if (style->filter.inherit) {
1512 sp_style_merge_ifilter(style, &parent->filter);
1513 }
1515 if(style->enable_background.inherit) {
1516 style->enable_background.value = parent->enable_background.value;
1517 }
1518 }
1520 template <typename T>
1521 static void
1522 sp_style_merge_prop_from_dying_parent(T &child, T const &parent)
1523 {
1524 if ( ( !(child.set) || child.inherit )
1525 && parent.set && !(parent.inherit) )
1526 {
1527 child = parent;
1528 }
1529 }
1531 /**
1532 * Copy SPIString from parent to child.
1533 */
1534 static void
1535 sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent)
1536 {
1537 if ( ( !(child.set) || child.inherit )
1538 && parent.set && !(parent.inherit) )
1539 {
1540 g_free(child.value);
1541 child.value = g_strdup(parent.value);
1542 child.set = parent.set;
1543 child.inherit = parent.inherit;
1544 }
1545 }
1547 static void
1548 sp_style_merge_paint_prop_from_dying_parent(SPStyle *style,
1549 SPIPaint &child, SPIPaint const &parent)
1550 {
1551 /** \todo
1552 * I haven't given this much attention. See comments below about
1553 * currentColor, colorProfile, and relative URIs.
1554 */
1555 if (!child.set || child.inherit || child.currentcolor) {
1556 sp_style_merge_ipaint(style, &child, &parent);
1557 child.set = parent.set;
1558 child.inherit = parent.inherit;
1559 }
1560 }
1562 static void
1563 sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent,
1564 unsigned const max_computed_val,
1565 unsigned const smaller_val)
1566 {
1567 /* We assume that min computed val is 0, contiguous up to max_computed_val,
1568 then zero or more other absolute values, then smaller_val then larger_val. */
1569 unsigned const min_computed_val = 0;
1570 unsigned const larger_val = smaller_val + 1;
1571 g_return_if_fail(min_computed_val < max_computed_val);
1572 g_return_if_fail(max_computed_val < smaller_val);
1574 if (parent.set && !parent.inherit) {
1575 if (!child.set || child.inherit) {
1576 child.value = parent.value;
1577 child.set = parent.set; // i.e. true
1578 child.inherit = parent.inherit; // i.e. false
1579 } else if (child.value < smaller_val) {
1580 /* Child has absolute value: leave as is. */
1581 } else if ( ( child.value == smaller_val
1582 && parent.value == larger_val )
1583 || ( parent.value == smaller_val
1584 && child.value == larger_val ) )
1585 {
1586 child.set = false;
1587 /*
1588 * Note that this can result in a change in computed value in the
1589 * rare case that the parent's setting was a no-op (i.e. if the
1590 * parent's parent's computed value was already ultra-condensed or
1591 * ultra-expanded). However, I'd guess that the change is for the
1592 * better: I'd guess that if the properties were specified
1593 * relatively, then the intent is to counteract parent's effect.
1594 * I.e. I believe this is the best code even in that case.
1595 */
1596 } else if (child.value == parent.value) {
1597 /* Leave as is. */
1598 /** \todo
1599 * It's unclear what to do if style and parent specify the same
1600 * relative directive (narrower or wider). We can either convert
1601 * to absolute specification or coalesce to a single relative
1602 * request (of half the strength of the original pair).
1603 *
1604 * Converting to a single level of relative specification is a
1605 * better choice if the newly-unlinked clone is itself cloned to
1606 * other contexts (inheriting different font stretchiness): it
1607 * would preserve the effect that it will be narrower than
1608 * the inherited context in each case. The disadvantage is that
1609 * it will ~certainly affect the computed value of the
1610 * newly-unlinked clone.
1611 */
1612 } else {
1613 unsigned const parent_val = parent.computed;
1614 child.value = ( child.value == smaller_val
1615 ? ( parent_val == min_computed_val
1616 ? parent_val
1617 : parent_val - 1 )
1618 : ( parent_val == max_computed_val
1619 ? parent_val
1620 : parent_val + 1 ) );
1621 g_assert(child.value <= max_computed_val);
1622 child.inherit = false;
1623 g_assert(child.set);
1624 }
1625 }
1626 }
1628 template <typename LengthT>
1629 static void
1630 sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent,
1631 double const parent_child_em_ratio)
1632 {
1633 if ( ( !(child.set) || child.inherit )
1634 && parent.set && !(parent.inherit) )
1635 {
1636 child = parent;
1637 switch (parent.unit) {
1638 case SP_CSS_UNIT_EM:
1639 case SP_CSS_UNIT_EX:
1640 child.value *= parent_child_em_ratio;
1641 /** \todo
1642 * fixme: Have separate ex ratio parameter.
1643 * Get x height from libnrtype or pango.
1644 */
1645 if (!isFinite(child.value)) {
1646 child.value = child.computed;
1647 child.unit = SP_CSS_UNIT_NONE;
1648 }
1649 break;
1651 default:
1652 break;
1653 }
1654 }
1655 }
1657 static double
1658 get_relative_font_size_frac(SPIFontSize const &font_size)
1659 {
1660 switch (font_size.type) {
1661 case SP_FONT_SIZE_LITERAL: {
1662 switch (font_size.value) {
1663 case SP_CSS_FONT_SIZE_SMALLER:
1664 return 5.0 / 6.0;
1666 case SP_CSS_FONT_SIZE_LARGER:
1667 return 6.0 / 5.0;
1669 default:
1670 g_assert_not_reached();
1671 }
1672 }
1674 case SP_FONT_SIZE_PERCENTAGE:
1675 return SP_F8_16_TO_FLOAT(font_size.value);
1677 case SP_FONT_SIZE_LENGTH:
1678 g_assert_not_reached();
1679 }
1680 g_assert_not_reached();
1681 }
1683 /**
1684 * Combine \a style and \a parent style specifications into a single style specification that
1685 * preserves (as much as possible) the effect of the existing \a style being a child of \a parent.
1686 *
1687 * Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being
1688 * unlinked), in which case we copy/adapt property values that are explicitly set in \a parent,
1689 * trying to retain the same visual appearance once the parent is removed. Interesting cases are
1690 * when there is unusual interaction with the parent's value (opacity, display) or when the value
1691 * can be specified as relative to the parent computed value (font-size, font-weight etc.).
1692 *
1693 * Doesn't update computed values of \a style. For correctness, you should subsequently call
1694 * sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a
1695 * style was previously up-to-date wrt \a parent.
1696 *
1697 * \pre \a parent's computed values are already up-to-date.
1698 * (\a style's computed values needn't be up-to-date.)
1699 */
1700 void
1701 sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent)
1702 {
1703 /** \note
1704 * The general rule for each property is as follows:
1705 *
1706 * If style is set to an absolute value, then leave it as is.
1707 *
1708 * Otherwise (i.e. if style has a relative value):
1709 *
1710 * If parent is set to an absolute value, then set style to the computed value.
1711 *
1712 * Otherwise, calculate the combined relative value (e.g. multiplying the two percentages).
1713 */
1715 /* We do font-size first, to ensure that em size is up-to-date. */
1716 /** \todo
1717 * fixme: We'll need to have more font-related things up the top once
1718 * we're getting x-height from pango or libnrtype.
1719 */
1721 /* Some things that allow relative specifications. */
1722 {
1723 /* font-size. Note that we update the computed font-size of style,
1724 to assist in em calculations later in this function. */
1725 if (parent->font_size.set && !parent->font_size.inherit) {
1726 if (!style->font_size.set || style->font_size.inherit) {
1727 /* font_size inherits the computed value, so we can use the parent value
1728 * verbatim. */
1729 style->font_size = parent->font_size;
1730 } else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) {
1731 /* Child already has absolute size (stored in computed value), so do nothing. */
1732 } else if ( style->font_size.type == SP_FONT_SIZE_LITERAL
1733 && style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) {
1734 /* Child already has absolute size, but we ensure that the computed value
1735 is up-to-date. */
1736 unsigned const ix = style->font_size.value;
1737 g_assert(ix < G_N_ELEMENTS(font_size_table));
1738 style->font_size.computed = font_size_table[ix];
1739 } else {
1740 /* Child has relative size. */
1741 double const child_frac(get_relative_font_size_frac(style->font_size));
1742 style->font_size.set = true;
1743 style->font_size.inherit = false;
1744 style->font_size.computed = parent->font_size.computed * child_frac;
1746 if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL
1747 && parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER )
1748 || parent->font_size.type == SP_FONT_SIZE_LENGTH )
1749 {
1750 /* Absolute value. */
1751 style->font_size.type = SP_FONT_SIZE_LENGTH;
1752 /* .value is unused for SP_FONT_SIZE_LENGTH. */
1753 } else {
1754 /* Relative value. */
1755 double const parent_frac(get_relative_font_size_frac(parent->font_size));
1756 style->font_size.type = SP_FONT_SIZE_PERCENTAGE;
1757 style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac);
1758 }
1759 }
1760 }
1762 /* 'font-stretch' */
1763 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch,
1764 parent->font_stretch,
1765 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
1766 SP_CSS_FONT_STRETCH_NARROWER);
1768 /* font-weight */
1769 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight,
1770 parent->font_weight,
1771 SP_CSS_FONT_WEIGHT_900,
1772 SP_CSS_FONT_WEIGHT_LIGHTER);
1773 }
1776 /* Enum values that don't have any relative settings (other than `inherit'). */
1777 {
1778 SPIEnum SPStyle::*const fields[] = {
1779 //nyi: SPStyle::clip_rule,
1780 //nyi: SPStyle::color_interpolation,
1781 //nyi: SPStyle::color_interpolation_filters,
1782 //nyi: SPStyle::color_rendering,
1783 &SPStyle::direction,
1784 &SPStyle::fill_rule,
1785 &SPStyle::font_style,
1786 &SPStyle::font_variant,
1787 //nyi: SPStyle::image_rendering,
1788 //nyi: SPStyle::pointer_events,
1789 //nyi: SPStyle::shape_rendering,
1790 &SPStyle::stroke_linecap,
1791 &SPStyle::stroke_linejoin,
1792 &SPStyle::text_anchor,
1793 //nyi: &SPStyle::text_rendering,
1794 &SPStyle::visibility,
1795 &SPStyle::writing_mode
1796 };
1798 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1799 SPIEnum SPStyle::*const fld = fields[i];
1800 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld);
1801 }
1802 }
1804 /* A few other simple inheritance properties. */
1805 {
1806 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity);
1807 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity);
1808 sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit);
1810 /** \todo
1811 * We currently treat text-decoration as if it were a simple inherited
1812 * property (fixme). This code may need changing once we do the
1813 * special fill/stroke inheritance mentioned by the spec.
1814 */
1815 sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration,
1816 parent->text_decoration);
1818 //nyi: font-size-adjust, // <number> | none | inherit
1819 //nyi: glyph-orientation-horizontal,
1820 //nyi: glyph-orientation-vertical,
1821 }
1823 /* Properties that involve length but are easy in other respects. */
1824 {
1825 /* The difficulty with lengths is that font-relative units need adjusting if the font
1826 * varies between parent & child.
1827 *
1828 * Lengths specified in the existing child can stay as they are: its computed font
1829 * specification should stay unchanged, so em & ex lengths should continue to mean the same
1830 * size.
1831 *
1832 * Lengths specified in the dying parent in em or ex need to be scaled according to the
1833 * ratio of em or ex size between parent & child.
1834 */
1835 double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed;
1837 SPILength SPStyle::*const lfields[] = {
1838 &SPStyle::stroke_width,
1839 &SPStyle::text_indent
1840 };
1841 for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) {
1842 SPILength SPStyle::*fld = lfields[i];
1843 sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld,
1844 parent->*fld,
1845 parent_child_em_ratio);
1846 }
1848 SPILengthOrNormal SPStyle::*const nfields[] = {
1849 &SPStyle::letter_spacing,
1850 &SPStyle::line_height,
1851 &SPStyle::word_spacing
1852 };
1853 for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) {
1854 SPILengthOrNormal SPStyle::*fld = nfields[i];
1855 sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld,
1856 parent->*fld,
1857 parent_child_em_ratio);
1858 }
1860 //nyi: &SPStyle::kerning: length or `auto'
1862 /* fixme: Move stroke-dash and stroke-dash-offset here once they
1863 can accept units. */
1864 }
1866 /* Properties that involve a URI but are easy in other respects. */
1867 {
1868 /** \todo
1869 * Could cause problems if original object was in another document
1870 * and it used a relative URL. (At the time of writing, we don't
1871 * allow hrefs to other documents, so this isn't a problem yet.)
1872 * Paint properties also allow URIs.
1873 */
1874 //nyi: cursor, // may involve change in effect, but we can't do much better
1875 //nyi: color-profile,
1877 // Markers (marker-start, marker-mid, marker-end).
1878 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1879 sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]);
1880 }
1881 }
1883 /* CSS2 */
1884 /* Font */
1886 if (style->text && parent->text) {
1887 sp_style_merge_string_prop_from_dying_parent(style->text->font_family,
1888 parent->text->font_family);
1889 }
1891 /* Properties that don't inherit by default. Most of these need special handling. */
1892 {
1893 /*
1894 * opacity's effect is cumulative; we set the new value to the combined effect. The
1895 * default value for opacity is 1.0, not inherit. (Note that stroke-opacity and
1896 * fill-opacity are quite different from opacity, and don't need any special handling.)
1897 *
1898 * Cases:
1899 * - parent & child were each previously unset, in which case the effective
1900 * opacity value is 1.0, and style should remain unset.
1901 * - parent was previously unset (so computed opacity value of 1.0)
1902 * and child was set to inherit. The merged child should
1903 * get a value of 1.0, and shouldn't inherit (lest the new parent
1904 * has a different opacity value). Given that opacity's default
1905 * value is 1.0 (rather than inherit), we might as well have the
1906 * merged child's opacity be unset.
1907 * - parent was previously unset (so opacity 1.0), and child was set to a number.
1908 * The merged child should retain its existing settings (though it doesn't matter
1909 * if we make it unset if that number was 1.0).
1910 * - parent was inherit and child was unset. Merged child should be set to inherit.
1911 * - parent was inherit and child was inherit. (We can't in general reproduce this
1912 * effect (short of introducing a new group), but setting opacity to inherit is rare.)
1913 * If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged
1914 * child's value should be set to the product of the two, i.e. the square of the
1915 * inherited value, and should not be marked as inherit. (This decision assumes that it
1916 * is more important to retain the effective opacity than to retain the inheriting
1917 * effect, and assumes that the inheriting effect either isn't important enough to create
1918 * a group or isn't common enough to bother maintaining the code to create a group.) If
1919 * the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes
1920 * closer to maintaining the effect.
1921 * - parent was inherit and child was set to a numerical value. If the child's value
1922 * was 1.0, then the merged child should have the same settings as the parent.
1923 * If the child's value was 0, then the merged child should also be set to 0.
1924 * If the child's value was anything else, then we do the same as for the inherit/inherit
1925 * case above: have the merged child set to the product of the two opacities and not
1926 * marked as inherit, for the same reasons as for that case.
1927 * - parent was set to a value, and child was unset. The merged child should have
1928 * parent's settings.
1929 * - parent was set to a value, and child was inherit. The merged child should
1930 * be set to the product, i.e. the square of the parent's value.
1931 * - parent & child are each set to a value. The merged child should be set to the
1932 * product.
1933 */
1934 if ( !style->opacity.set
1935 || ( !style->opacity.inherit
1936 && style->opacity.value == SP_SCALE24_MAX ) )
1937 {
1938 style->opacity = parent->opacity;
1939 } else {
1940 /* Ensure that style's computed value is up-to-date. */
1941 if (style->opacity.inherit) {
1942 style->opacity.value = parent->opacity.value;
1943 }
1945 /* Multiplication of opacities occurs even if a child's opacity is set to inherit. */
1946 style->opacity.value = SP_SCALE24_MUL(style->opacity.value,
1947 parent->opacity.value);
1949 style->opacity.inherit = (parent->opacity.inherit
1950 && style->opacity.inherit
1951 && (parent->opacity.value == 0 ||
1952 parent->opacity.value == SP_SCALE24_MAX));
1953 style->opacity.set = ( style->opacity.inherit
1954 || style->opacity.value < SP_SCALE24_MAX );
1955 }
1957 /* display is in principle similar to opacity, but implementation is easier. */
1958 if ( parent->display.set && !parent->display.inherit
1959 && parent->display.value == SP_CSS_DISPLAY_NONE ) {
1960 style->display.value = SP_CSS_DISPLAY_NONE;
1961 style->display.set = true;
1962 style->display.inherit = false;
1963 } else if (style->display.inherit) {
1964 style->display.value = parent->display.value;
1965 style->display.set = parent->display.set;
1966 style->display.inherit = parent->display.inherit;
1967 } else {
1968 /* Leave as is. (display doesn't inherit by default.) */
1969 }
1971 /* enable-background - this is rather complicated, because
1972 * it is valid only when applied to container elements.
1973 * Let's check a simple case anyhow. */
1974 if (parent->enable_background.set
1975 && !parent->enable_background.inherit
1976 && style->enable_background.inherit)
1977 {
1978 style->enable_background.set = true;
1979 style->enable_background.inherit = false;
1980 style->enable_background.value = parent->enable_background.value;
1981 }
1983 if (!style->filter.set || style->filter.inherit)
1984 {
1985 // FIXME:
1986 // instead of just copying over, we need to _really merge_ the two filters by combining their
1987 // filter primitives
1988 sp_style_merge_ifilter(style, &parent->filter);
1989 }
1991 /** \todo
1992 * fixme: Check that we correctly handle all properties that don't
1993 * inherit by default (as shown in
1994 * http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties).
1995 */
1996 }
1998 /* SPIPaint properties (including color). */
1999 {
2000 /** \todo
2001 * Think about the issues involved if specified as currentColor or
2002 * if specified relative to colorProfile, and if the currentColor or
2003 * colorProfile differs between parent \& child. See also comments
2004 * elsewhere in this function about URIs.
2005 */
2006 SPIPaint SPStyle::*const fields[] = {
2007 &SPStyle::color,
2008 &SPStyle::fill,
2009 &SPStyle::stroke
2010 };
2011 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
2012 SPIPaint SPStyle::*const fld = fields[i];
2013 sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld);
2014 }
2015 }
2017 /* Things from SVG 1.2 or CSS3. */
2018 {
2019 /* Note: If we ever support setting string values for text-align then we'd need strdup
2020 * handling here. */
2021 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align);
2023 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform);
2024 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression);
2025 }
2027 /* Note: this will need length handling once dasharray supports units. */
2028 if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit )
2029 && parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit )
2030 {
2031 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
2032 if (style->stroke_dash.n_dash > 0) {
2033 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
2034 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
2035 }
2036 style->stroke_dasharray_set = parent->stroke_dasharray_set;
2037 style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit;
2038 }
2040 /* Note: this will need length handling once dasharray_offset supports units. */
2041 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
2042 style->stroke_dash.offset = parent->stroke_dash.offset;
2043 style->stroke_dashoffset_set = parent->stroke_dashoffset_set;
2044 /* fixme: we don't currently allow stroke-dashoffset to be `inherit'. TODO: Try to
2045 * represent it as a normal SPILength; though will need to do something about existing
2046 * users of stroke_dash.offset and stroke_dashoffset_set. */
2047 }
2048 }
2051 static void
2052 sp_style_set_ipaint_to_uri(SPStyle *style, SPIPaint *paint, const Inkscape::URI *uri, SPDocument *document)
2053 {
2054 // it may be that this style's SPIPaint has not yet created its URIReference;
2055 // now that we have a document, we can create it here
2056 if (!paint->value.href && document) {
2057 paint->value.href = new SPPaintServerReference(document);
2058 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));
2059 }
2061 if (paint->value.href && paint->value.href->getObject())
2062 paint->value.href->detach();
2064 if (paint->value.href) {
2065 try {
2066 paint->value.href->attach(*uri);
2067 } catch (Inkscape::BadURIException &e) {
2068 g_warning("%s", e.what());
2069 paint->value.href->detach();
2070 }
2071 }
2072 }
2074 static void
2075 sp_style_set_ipaint_to_uri_string (SPStyle *style, SPIPaint *paint, const gchar *uri)
2076 {
2077 const Inkscape::URI IURI(uri);
2078 sp_style_set_ipaint_to_uri(style, paint, &IURI, style->document);
2079 }
2081 void
2082 sp_style_set_to_uri_string (SPStyle *style, bool isfill, const gchar *uri)
2083 {
2084 sp_style_set_ipaint_to_uri_string (style, isfill? &style->fill : &style->stroke, uri);
2085 }
2087 /**
2088 *
2089 */
2090 static void
2091 sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
2092 {
2093 sp_style_paint_clear(style, paint);
2095 if ((paint->set && paint->currentcolor) || parent->currentcolor) {
2096 paint->currentcolor = TRUE;
2097 paint->type = SP_PAINT_TYPE_COLOR;
2098 sp_color_copy(&paint->value.color, &style->color.value.color);
2099 return;
2100 }
2102 paint->type = parent->type;
2103 switch (paint->type) {
2104 case SP_PAINT_TYPE_COLOR:
2105 sp_color_copy(&paint->value.color, &parent->value.color);
2106 break;
2107 case SP_PAINT_TYPE_PAINTSERVER:
2108 if (parent->value.href) {
2109 sp_style_set_ipaint_to_uri(style, paint, parent->value.href->getURI(), parent->value.href->getOwnerDocument());
2110 }
2111 break;
2112 case SP_PAINT_TYPE_NONE:
2113 break;
2114 default:
2115 g_assert_not_reached();
2116 break;
2117 }
2118 }
2121 /**
2122 * Merge filter style from parent.
2123 * Filter effects do not inherit by default
2124 */
2125 static void
2126 sp_style_merge_ifilter(SPStyle *style, SPIFilter const *parent)
2127 {
2128 sp_style_filter_clear(style);
2129 style->filter.set = parent->set;
2130 style->filter.inherit = parent->inherit;
2132 if (style->filter.href && style->filter.href->getObject())
2133 style->filter.href->detach();
2135 if (style->filter.href && parent->href) {
2136 try {
2137 style->filter.href->attach(*parent->href->getURI());
2138 } catch (Inkscape::BadURIException &e) {
2139 g_warning("%s", e.what());
2140 style->filter.href->detach();
2141 }
2142 }
2143 }
2145 /**
2146 * Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or
2147 * SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's
2148 * complete cascaded style to style_clipboard. When you need a CSS string
2149 * for an object in the document tree, you normally call
2150 * sp_style_write_difference instead to take into account the object's parent.
2151 *
2152 * \pre style != NULL.
2153 * \pre flags in {IFSET, ALWAYS}.
2154 * \post ret != NULL.
2155 */
2156 gchar *
2157 sp_style_write_string(SPStyle const *const style, guint const flags)
2158 {
2159 /** \todo
2160 * Merge with write_difference, much duplicate code!
2161 */
2162 g_return_val_if_fail(style != NULL, NULL);
2163 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
2164 (flags == SP_STYLE_FLAG_ALWAYS) ),
2165 NULL);
2167 gchar c[BMAX];
2168 gchar *p = c;
2169 *p = '\0';
2171 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags);
2172 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags);
2173 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags);
2174 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags);
2175 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags);
2177 /* Text */
2178 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags);
2179 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags);
2180 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags);
2181 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags);
2182 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags);
2183 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags);
2184 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags);
2185 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags);
2186 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags);
2187 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags);
2189 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags);
2191 /// \todo fixme: Per type methods need default flag too (lauris)
2192 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags);
2193 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags);
2194 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags);
2195 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags);
2196 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags);
2197 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags);
2198 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags);
2199 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags);
2200 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags);
2202 if (style->marker[SP_MARKER_LOC].set) {
2203 p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value);
2204 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2205 p += g_snprintf(p, c + BMAX - p, "marker:none;");
2206 }
2207 if (style->marker[SP_MARKER_LOC_START].set) {
2208 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value);
2209 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2210 p += g_snprintf(p, c + BMAX - p, "marker-start:none;");
2211 }
2212 if (style->marker[SP_MARKER_LOC_MID].set) {
2213 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value);
2214 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2215 p += g_snprintf(p, c + BMAX - p, "marker-mid:none;");
2216 }
2217 if (style->marker[SP_MARKER_LOC_END].set) {
2218 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value);
2219 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2220 p += g_snprintf(p, c + BMAX - p, "marker-end:none;");
2221 }
2223 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags);
2225 /** \todo fixme: */
2226 if ((flags == SP_STYLE_FLAG_ALWAYS)
2227 || style->stroke_dasharray_set)
2228 {
2229 if (style->stroke_dasharray_inherit) {
2230 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2231 } else if (style->stroke_dash.n_dash && style->stroke_dash.dash) {
2232 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2233 gint i;
2234 for (i = 0; i < style->stroke_dash.n_dash; i++) {
2235 Inkscape::CSSOStringStream os;
2236 if (i) {
2237 os << ", ";
2238 }
2239 os << style->stroke_dash.dash[i];
2240 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2241 }
2242 if (p < c + BMAX) {
2243 *p++ = ';';
2244 }
2245 } else {
2246 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;");
2247 }
2248 }
2250 /** \todo fixme: */
2251 if (style->stroke_dashoffset_set) {
2252 Inkscape::CSSOStringStream os;
2253 os << "stroke-dashoffset:" << style->stroke_dash.offset << ";";
2254 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2255 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2256 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;");
2257 }
2259 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags);
2261 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags);
2262 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags);
2263 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags);
2265 /* filter: */
2266 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &style->filter, NULL, flags);
2268 p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &style->enable_background, NULL, flags);
2270 /* fixme: */
2271 p += sp_text_style_write(p, c + BMAX - p, style->text, flags);
2273 /* Get rid of trailing `;'. */
2274 if (p != c) {
2275 --p;
2276 if (*p == ';') {
2277 *p = '\0';
2278 }
2279 }
2281 return g_strdup(c);
2282 }
2285 #define STYLE_BUF_MAX
2288 /**
2289 * Dumps style to CSS string, see sp_style_write_string()
2290 *
2291 * \pre from != NULL.
2292 * \pre to != NULL.
2293 * \post ret != NULL.
2294 */
2295 gchar *
2296 sp_style_write_difference(SPStyle const *const from, SPStyle const *const to)
2297 {
2298 g_return_val_if_fail(from != NULL, NULL);
2299 g_return_val_if_fail(to != NULL, NULL);
2301 gchar c[BMAX], *p = c;
2302 *p = '\0';
2304 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF);
2305 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF);
2306 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF);
2307 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF);
2308 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF);
2310 /* Text */
2311 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF);
2312 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF);
2313 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF);
2314 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF);
2315 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF);
2316 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF);
2317 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF);
2318 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF);
2319 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF);
2320 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF);
2322 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF);
2324 /// \todo fixme: Per type methods need default flag too
2325 if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) {
2326 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET);
2327 }
2328 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET);
2329 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF);
2330 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF);
2331 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF);
2332 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF);
2333 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF);
2334 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap,
2335 &from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF);
2336 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin,
2337 &from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF);
2338 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit",
2339 &from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF);
2340 /** \todo fixme: */
2341 if (from->stroke_dasharray_set) {
2342 if (from->stroke_dasharray_inherit) {
2343 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2344 } else if (from->stroke_dash.n_dash && from->stroke_dash.dash) {
2345 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2346 for (gint i = 0; i < from->stroke_dash.n_dash; i++) {
2347 Inkscape::CSSOStringStream os;
2348 if (i) {
2349 os << ", ";
2350 }
2351 os << from->stroke_dash.dash[i];
2352 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2353 }
2354 p += g_snprintf(p, c + BMAX - p, ";");
2355 }
2356 }
2357 /* fixme: */
2358 if (from->stroke_dashoffset_set) {
2359 Inkscape::CSSOStringStream os;
2360 os << "stroke-dashoffset:" << from->stroke_dash.offset << ";";
2361 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2362 }
2363 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF);
2365 /* markers */
2366 if (from->marker[SP_MARKER_LOC].value != NULL) {
2367 p += g_snprintf(p, c + BMAX - p, "marker:%s;", from->marker[SP_MARKER_LOC].value);
2368 }
2369 if (from->marker[SP_MARKER_LOC_START].value != NULL) {
2370 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value);
2371 }
2372 if (from->marker[SP_MARKER_LOC_MID].value != NULL) {
2373 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value);
2374 }
2375 if (from->marker[SP_MARKER_LOC_END].value != NULL) {
2376 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value);
2377 }
2379 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET);
2380 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET);
2381 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET);
2383 /* filter: */
2384 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &from->filter, &to->filter, SP_STYLE_FLAG_IFDIFF);
2386 p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &from->enable_background, &to->enable_background, SP_STYLE_FLAG_IFSET);
2388 p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF);
2390 /** \todo
2391 * The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF
2392 * flag is mainly only for attributes that don't handle explicit unset well.
2393 * We may need to revisit the behaviour of this routine.
2394 */
2396 /* Get rid of trailing `;'. */
2397 if (p != c) {
2398 --p;
2399 if (*p == ';') {
2400 *p = '\0';
2401 }
2402 }
2404 return g_strdup(c);
2405 }
2409 /**
2410 * Reset all style properties.
2411 */
2412 static void
2413 sp_style_clear(SPStyle *style)
2414 {
2415 g_return_if_fail(style != NULL);
2417 sp_style_paint_clear(style, &style->fill);
2418 sp_style_paint_clear(style, &style->stroke);
2419 sp_style_filter_clear(style);
2421 if (style->fill.value.href)
2422 delete style->fill.value.href;
2423 if (style->stroke.value.href)
2424 delete style->stroke.value.href;
2425 if (style->filter.href)
2426 delete style->filter.href;
2428 if (style->stroke_dash.dash) {
2429 g_free(style->stroke_dash.dash);
2430 }
2432 /** \todo fixme: Do that text manipulation via parents */
2433 SPObject *object = style->object;
2434 SPDocument *document = style->document;
2435 gint const refcount = style->refcount;
2436 SPTextStyle *text = style->text;
2437 unsigned const text_private = style->text_private;
2439 memset(style, 0, sizeof(SPStyle));
2441 style->refcount = refcount;
2442 style->object = object;
2443 style->document = document;
2445 if (document) {
2446 style->filter.href = new SPFilterReference(document);
2447 style->filter.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_filter_ref_changed), style));
2449 style->fill.value.href = new SPPaintServerReference(document);
2450 style->fill.value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_fill_paint_server_ref_changed), style));
2452 style->stroke.value.href = new SPPaintServerReference(document);
2453 style->stroke.value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_stroke_paint_server_ref_changed), style));
2454 }
2456 style->text = text;
2457 style->text_private = text_private;
2459 /* fixme: */
2460 style->text->font.set = FALSE;
2461 style->text->font_family.set = FALSE;
2463 style->font_size.set = FALSE;
2464 style->font_size.type = SP_FONT_SIZE_LITERAL;
2465 style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM;
2466 style->font_size.computed = 12.0;
2467 style->font_style.set = FALSE;
2468 style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL;
2469 style->font_variant.set = FALSE;
2470 style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL;
2471 style->font_weight.set = FALSE;
2472 style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL;
2473 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
2474 style->font_stretch.set = FALSE;
2475 style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL;
2477 /* text */
2478 style->text_indent.set = FALSE;
2479 style->text_indent.unit = SP_CSS_UNIT_NONE;
2480 style->text_indent.computed = 0.0;
2482 style->text_align.set = FALSE;
2483 style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START;
2485 style->text_decoration.set = FALSE;
2486 style->text_decoration.underline = FALSE;
2487 style->text_decoration.overline = FALSE;
2488 style->text_decoration.line_through = FALSE;
2489 style->text_decoration.blink = FALSE;
2491 style->line_height.set = FALSE;
2492 style->line_height.unit = SP_CSS_UNIT_PERCENT;
2493 style->line_height.normal = TRUE;
2494 style->line_height.value = style->line_height.computed = 1.0;
2496 style->letter_spacing.set = FALSE;
2497 style->letter_spacing.unit = SP_CSS_UNIT_NONE;
2498 style->letter_spacing.normal = TRUE;
2499 style->letter_spacing.value = style->letter_spacing.computed = 0.0;
2501 style->word_spacing.set = FALSE;
2502 style->word_spacing.unit = SP_CSS_UNIT_NONE;
2503 style->word_spacing.normal = TRUE;
2504 style->word_spacing.value = style->word_spacing.computed = 0.0;
2506 style->text_transform.set = FALSE;
2507 style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE;
2509 style->direction.set = FALSE;
2510 style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR;
2512 style->block_progression.set = FALSE;
2513 style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB;
2515 style->writing_mode.set = FALSE;
2516 style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB;
2519 style->text_anchor.set = FALSE;
2520 style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START;
2523 style->opacity.value = SP_SCALE24_MAX;
2524 style->visibility.set = FALSE;
2525 style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE;
2526 style->display.set = FALSE;
2527 style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE;
2528 style->overflow.set = FALSE;
2529 style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE;
2531 style->color.type = SP_PAINT_TYPE_COLOR;
2532 sp_color_set_rgb_float(&style->color.value.color, 0.0, 0.0, 0.0);
2534 style->fill.type = SP_PAINT_TYPE_COLOR;
2535 sp_color_set_rgb_float(&style->fill.value.color, 0.0, 0.0, 0.0);
2536 style->fill_opacity.value = SP_SCALE24_MAX;
2537 style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO;
2539 style->stroke.type = SP_PAINT_TYPE_NONE;
2540 style->stroke.set = FALSE;
2541 sp_color_set_rgb_float(&style->stroke.value.color, 0.0, 0.0, 0.0);
2542 style->stroke_opacity.value = SP_SCALE24_MAX;
2544 style->stroke_width.set = FALSE;
2545 style->stroke_width.unit = SP_CSS_UNIT_NONE;
2546 style->stroke_width.computed = 1.0;
2548 style->stroke_linecap.set = FALSE;
2549 style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT;
2550 style->stroke_linejoin.set = FALSE;
2551 style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER;
2553 style->stroke_miterlimit.set = FALSE;
2554 style->stroke_miterlimit.value = 4.0;
2556 style->stroke_dash.n_dash = 0;
2557 style->stroke_dash.dash = NULL;
2558 style->stroke_dash.offset = 0.0;
2560 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
2561 g_free(style->marker[i].value);
2562 style->marker[i].set = FALSE;
2563 }
2565 style->enable_background.value = SP_CSS_BACKGROUND_ACCUMULATE;
2566 style->enable_background.set = false;
2567 style->enable_background.inherit = false;
2568 }
2572 /**
2573 *
2574 */
2575 static void
2576 sp_style_read_dash(SPStyle *style, gchar const *str)
2577 {
2578 /* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */
2579 style->stroke_dasharray_set = TRUE;
2581 if (strcmp(str, "inherit") == 0) {
2582 style->stroke_dasharray_inherit = true;
2583 return;
2584 }
2585 style->stroke_dasharray_inherit = false;
2587 NRVpathDash &dash = style->stroke_dash;
2588 g_free(dash.dash);
2589 dash.dash = NULL;
2591 if (strcmp(str, "none") == 0) {
2592 dash.n_dash = 0;
2593 return;
2594 }
2596 gint n_dash = 0;
2597 gdouble d[64];
2598 gchar *e = NULL;
2600 bool LineSolid=true;
2601 while (e != str && n_dash < 64) {
2602 /* TODO: Should allow <length> rather than just a unitless (px) number. */
2603 d[n_dash] = g_ascii_strtod(str, (char **) &e);
2604 if (d[n_dash] > 0.00000001)
2605 LineSolid = false;
2606 if (e != str) {
2607 n_dash += 1;
2608 str = e;
2609 }
2610 while (str && *str && !isalnum(*str)) str += 1;
2611 }
2613 if (LineSolid) {
2614 dash.n_dash = 0;
2615 return;
2616 }
2618 if (n_dash > 0) {
2619 dash.dash = g_new(gdouble, n_dash);
2620 memcpy(dash.dash, d, sizeof(gdouble) * n_dash);
2621 dash.n_dash = n_dash;
2622 }
2623 }
2626 /*#########################
2627 ## SPTextStyle operations
2628 #########################*/
2631 /**
2632 * Return new SPTextStyle object with default settings.
2633 */
2634 static SPTextStyle *
2635 sp_text_style_new()
2636 {
2637 SPTextStyle *ts = g_new0(SPTextStyle, 1);
2638 ts->refcount = 1;
2639 sp_text_style_clear(ts);
2641 ts->font.value = g_strdup("Bitstream Vera Sans");
2642 ts->font_family.value = g_strdup("Bitstream Vera Sans");
2644 return ts;
2645 }
2648 /**
2649 * Clear text style settings.
2650 */
2651 static void
2652 sp_text_style_clear(SPTextStyle *ts)
2653 {
2654 ts->font.set = FALSE;
2655 ts->font_family.set = FALSE;
2656 }
2660 /**
2661 * Reduce refcount of text style and possibly free it.
2662 */
2663 static SPTextStyle *
2664 sp_text_style_unref(SPTextStyle *st)
2665 {
2666 st->refcount -= 1;
2668 if (st->refcount < 1) {
2669 g_free(st->font.value);
2670 g_free(st->font_family.value);
2671 g_free(st);
2672 }
2674 return NULL;
2675 }
2679 /**
2680 * Return duplicate of text style.
2681 */
2682 static SPTextStyle *
2683 sp_text_style_duplicate_unset(SPTextStyle *st)
2684 {
2685 SPTextStyle *nt = g_new0(SPTextStyle, 1);
2686 nt->refcount = 1;
2688 nt->font.value = g_strdup(st->font.value);
2689 nt->font_family.value = g_strdup(st->font_family.value);
2691 return nt;
2692 }
2696 /**
2697 * Write SPTextStyle object into string.
2698 */
2699 static guint
2700 sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags)
2701 {
2702 gint d = 0;
2704 // We do not do diffing for text style
2705 if (flags == SP_STYLE_FLAG_IFDIFF)
2706 flags = SP_STYLE_FLAG_IFSET;
2708 d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags);
2709 return d;
2710 }
2714 /* The following sp_tyle_read_* functions ignore invalid values, as per
2715 * http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors.
2716 *
2717 * [However, the SVG spec is somewhat unclear as to whether the style attribute should
2718 * be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE
2719 * pairs, in which case SVG's error-handling rules
2720 * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.]
2721 */
2724 /**
2725 * Set SPIFloat object from string.
2726 */
2727 static void
2728 sp_style_read_ifloat(SPIFloat *val, gchar const *str)
2729 {
2730 if (!strcmp(str, "inherit")) {
2731 val->set = TRUE;
2732 val->inherit = TRUE;
2733 } else {
2734 gfloat value;
2735 if (sp_svg_number_read_f(str, &value)) {
2736 val->set = TRUE;
2737 val->inherit = FALSE;
2738 val->value = value;
2739 }
2740 }
2741 }
2745 /**
2746 * Set SPIScale24 object from string.
2747 */
2748 static void
2749 sp_style_read_iscale24(SPIScale24 *val, gchar const *str)
2750 {
2751 if (!strcmp(str, "inherit")) {
2752 val->set = TRUE;
2753 val->inherit = TRUE;
2754 } else {
2755 gfloat value;
2756 if (sp_svg_number_read_f(str, &value)) {
2757 val->set = TRUE;
2758 val->inherit = FALSE;
2759 value = CLAMP(value, 0.0f, (gfloat) SP_SCALE24_MAX);
2760 val->value = SP_SCALE24_FROM_FLOAT(value);
2761 }
2762 }
2763 }
2765 /**
2766 * Reads a style value and performs lookup based on the given style value enumerations.
2767 */
2768 static void
2769 sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict,
2770 bool const can_explicitly_inherit)
2771 {
2772 if ( can_explicitly_inherit && !strcmp(str, "inherit") ) {
2773 val->set = TRUE;
2774 val->inherit = TRUE;
2775 } else {
2776 for (unsigned i = 0; dict[i].key; i++) {
2777 if (!strcmp(str, dict[i].key)) {
2778 val->set = TRUE;
2779 val->inherit = FALSE;
2780 val->value = dict[i].value;
2781 /* Save copying for values not needing it */
2782 val->computed = val->value;
2783 break;
2784 }
2785 }
2786 }
2787 }
2791 /**
2792 * Set SPIString object from string.
2793 */
2794 static void
2795 sp_style_read_istring(SPIString *val, gchar const *str)
2796 {
2797 g_free(val->value);
2799 if (!strcmp(str, "inherit")) {
2800 val->set = TRUE;
2801 val->inherit = TRUE;
2802 val->value = NULL;
2803 } else {
2804 val->set = TRUE;
2805 val->inherit = FALSE;
2806 val->value = g_strdup(str);
2807 }
2808 }
2812 /**
2813 * Set SPILength object from string.
2814 */
2815 static void
2816 sp_style_read_ilength(SPILength *val, gchar const *str)
2817 {
2818 if (!strcmp(str, "inherit")) {
2819 val->set = TRUE;
2820 val->inherit = TRUE;
2821 } else {
2822 gdouble value;
2823 gchar *e;
2824 /** \todo fixme: Move this to standard place (Lauris) */
2825 value = g_ascii_strtod(str, &e);
2826 if ((gchar const *) e != str) {
2827 /** \todo
2828 * Allow the number of px per inch to vary (document preferences,
2829 * X server or whatever). E.g. don't fill in computed here, do
2830 * it at the same time as percentage units are done.
2831 */
2832 if (!*e) {
2833 /* Userspace */
2834 val->unit = SP_CSS_UNIT_NONE;
2835 val->computed = value;
2836 } else if (!strcmp(e, "px")) {
2837 /* Userspace */
2838 val->unit = SP_CSS_UNIT_PX;
2839 val->computed = value;
2840 } else if (!strcmp(e, "pt")) {
2841 /* Userspace / DEVICESCALE */
2842 val->unit = SP_CSS_UNIT_PT;
2843 val->computed = value * PX_PER_PT;
2844 } else if (!strcmp(e, "pc")) {
2845 /* 1 pica = 12pt; FIXME: add it to SPUnit */
2846 val->unit = SP_CSS_UNIT_PC;
2847 val->computed = value * PX_PER_PT * 12;
2848 } else if (!strcmp(e, "mm")) {
2849 val->unit = SP_CSS_UNIT_MM;
2850 val->computed = value * PX_PER_MM;
2851 } else if (!strcmp(e, "cm")) {
2852 val->unit = SP_CSS_UNIT_CM;
2853 val->computed = value * PX_PER_CM;
2854 } else if (!strcmp(e, "in")) {
2855 val->unit = SP_CSS_UNIT_IN;
2856 val->computed = value * PX_PER_IN;
2857 } else if (!strcmp(e, "em")) {
2858 /* EM square */
2859 val->unit = SP_CSS_UNIT_EM;
2860 val->value = value;
2861 } else if (!strcmp(e, "ex")) {
2862 /* ex square */
2863 val->unit = SP_CSS_UNIT_EX;
2864 val->value = value;
2865 } else if (!strcmp(e, "%")) {
2866 /* Percentage */
2867 val->unit = SP_CSS_UNIT_PERCENT;
2868 val->value = value * 0.01;
2869 } else {
2870 /* Invalid */
2871 return;
2872 }
2873 val->set = TRUE;
2874 val->inherit = FALSE;
2875 }
2876 }
2877 }
2879 /**
2880 * Set SPILengthOrNormal object from string.
2881 */
2882 static void
2883 sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str)
2884 {
2885 if (!strcmp(str, "normal")) {
2886 val->set = TRUE;
2887 val->inherit = FALSE;
2888 val->normal = TRUE;
2889 val->unit = SP_CSS_UNIT_NONE;
2890 val->value = val->computed = 0.0;
2891 } else {
2892 SPILength length;
2893 sp_style_read_ilength(&length, str);
2894 val->set = length.set;
2895 val->inherit = length.inherit;
2896 val->normal = FALSE;
2897 val->unit = length.unit;
2898 val->value = length.value;
2899 val->computed = length.computed;
2900 }
2901 }
2903 /**
2904 * Set SPITextDecoration object from string.
2905 */
2906 static void
2907 sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str)
2908 {
2909 if (!strcmp(str, "inherit")) {
2910 val->set = TRUE;
2911 val->inherit = TRUE;
2912 } else if (!strcmp(str, "none")) {
2913 val->set = TRUE;
2914 val->inherit = FALSE;
2915 val->underline = FALSE;
2916 val->overline = FALSE;
2917 val->line_through = FALSE;
2918 val->blink = FALSE;
2919 } else {
2920 bool found_underline = false;
2921 bool found_overline = false;
2922 bool found_line_through = false;
2923 bool found_blink = false;
2924 for ( ; *str ; str++ ) {
2925 if (*str == ' ') continue;
2926 if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) {
2927 found_underline = true;
2928 str += 9;
2929 } else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) {
2930 found_overline = true;
2931 str += 8;
2932 } else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) {
2933 found_line_through = true;
2934 str += 12;
2935 } else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) {
2936 found_blink = true;
2937 str += 5;
2938 } else {
2939 return; // invalid value
2940 }
2941 }
2942 if (!(found_underline || found_overline || found_line_through || found_blink)) {
2943 return; // invalid value: empty
2944 }
2945 val->set = TRUE;
2946 val->inherit = FALSE;
2947 val->underline = found_underline;
2948 val->overline = found_overline;
2949 val->line_through = found_line_through;
2950 val->blink = found_blink;
2951 }
2952 }
2954 /**
2955 * Set SPIPaint object from string containing an integer value.
2956 * \param document Ignored
2957 */
2958 static void
2959 sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2960 {
2961 paint->currentcolor = FALSE; /* currentColor not a valid <color>. */
2962 if (!strcmp(str, "inherit")) {
2963 paint->set = TRUE;
2964 paint->inherit = TRUE;
2965 } else {
2966 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
2967 if (rgb0 != 0xff) {
2968 paint->type = SP_PAINT_TYPE_COLOR;
2969 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2970 paint->set = TRUE;
2971 paint->inherit = FALSE;
2972 }
2973 }
2974 }
2977 /**
2978 * Set SPIPaint object from string.
2979 *
2980 * \pre paint == \&style.fill || paint == \&style.stroke.
2981 */
2982 static void
2983 sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2984 {
2985 while (isspace(*str)) {
2986 ++str;
2987 }
2989 if (streq(str, "inherit")) {
2990 paint->set = TRUE;
2991 paint->inherit = TRUE;
2992 paint->currentcolor = FALSE;
2993 } else if (streq(str, "currentColor") && paint != &style->color) {
2994 paint->set = TRUE;
2995 paint->inherit = FALSE;
2996 paint->currentcolor = TRUE;
2997 } else if (streq(str, "none") && paint != &style->color) {
2998 paint->type = SP_PAINT_TYPE_NONE;
2999 paint->set = TRUE;
3000 paint->inherit = FALSE;
3001 paint->currentcolor = FALSE;
3002 } else if (strneq(str, "url", 3) && paint != &style->color) {
3003 gchar *uri = extract_uri(str);
3004 if(uri == NULL || uri[0] == '\0') {
3005 paint->type = SP_PAINT_TYPE_NONE;
3006 return;
3007 }
3008 paint->type = SP_PAINT_TYPE_PAINTSERVER;
3009 paint->set = TRUE;
3010 paint->inherit = FALSE;
3011 paint->currentcolor = FALSE;
3013 // it may be that this style's SPIPaint has not yet created its URIReference;
3014 // now that we have a document, we can create it here
3015 if (!paint->value.href && document) {
3016 paint->value.href = new SPPaintServerReference(document);
3017 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));
3018 }
3020 sp_style_set_ipaint_to_uri_string (style, paint, uri);
3022 g_free (uri);
3024 } else {
3025 guint32 const rgb0 = sp_svg_read_color(str, &str, 0xff);
3026 if (rgb0 != 0xff) {
3027 paint->type = SP_PAINT_TYPE_COLOR;
3028 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
3029 paint->set = TRUE;
3030 paint->inherit = FALSE;
3031 paint->currentcolor = FALSE;
3033 while (g_ascii_isspace(*str)) {
3034 ++str;
3035 }
3036 if (strneq(str, "icc-color(", 10)) {
3037 SVGICCColor* tmp = new SVGICCColor();
3038 if ( ! sp_svg_read_icc_color( str, &str, tmp ) ) {
3039 delete tmp;
3040 tmp = 0;
3041 }
3042 paint->value.iccColor = tmp;
3043 }
3044 }
3045 }
3046 }
3050 /**
3051 * Set SPIFontSize object from string.
3052 */
3053 static void
3054 sp_style_read_ifontsize(SPIFontSize *val, gchar const *str)
3055 {
3056 if (!strcmp(str, "inherit")) {
3057 val->set = TRUE;
3058 val->inherit = TRUE;
3059 } else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) {
3060 for (unsigned i = 0; enum_font_size[i].key; i++) {
3061 if (!strcmp(str, enum_font_size[i].key)) {
3062 val->set = TRUE;
3063 val->inherit = FALSE;
3064 val->type = SP_FONT_SIZE_LITERAL;
3065 val->value = enum_font_size[i].value;
3066 return;
3067 }
3068 }
3069 /* Invalid */
3070 return;
3071 } else {
3072 gdouble value;
3073 gchar *e;
3074 /* fixme: Move this to standard place (Lauris) */
3075 value = g_ascii_strtod(str, &e);
3076 if ((gchar const *) e != str) {
3077 if (!*e) {
3078 /* Userspace */
3079 } else if (!strcmp(e, "px")) {
3080 /* Userspace */
3081 } else if (!strcmp(e, "pt")) {
3082 /* Userspace * DEVICESCALE */
3083 value *= PX_PER_PT;
3084 } else if (!strcmp(e, "pc")) {
3085 /* 12pt */
3086 value *= PX_PER_PT * 12.0;
3087 } else if (!strcmp(e, "mm")) {
3088 value *= PX_PER_MM;
3089 } else if (!strcmp(e, "cm")) {
3090 value *= PX_PER_CM;
3091 } else if (!strcmp(e, "in")) {
3092 value *= PX_PER_IN;
3093 } else if (!strcmp(e, "%")) {
3094 /* Percentage */
3095 val->set = TRUE;
3096 val->inherit = FALSE;
3097 val->type = SP_FONT_SIZE_PERCENTAGE;
3098 val->value = SP_F8_16_FROM_FLOAT(value / 100.0);
3099 return;
3100 } else {
3101 /* Invalid */
3102 return;
3103 }
3104 /* Length */
3105 val->set = TRUE;
3106 val->inherit = FALSE;
3107 val->type = SP_FONT_SIZE_LENGTH;
3108 val->computed = value;
3109 return;
3110 }
3111 }
3112 }
3116 /**
3117 * Set SPIFilter object from string.
3118 */
3119 static void
3120 sp_style_read_ifilter(gchar const *str, SPStyle * style, SPDocument *document)
3121 {
3122 SPIFilter *f = &(style->filter);
3123 /* Try all possible values: inherit, none, uri */
3124 if (streq(str, "inherit")) {
3125 f->set = TRUE;
3126 f->inherit = TRUE;
3127 if (f->href && f->href->getObject())
3128 f->href->detach();
3129 } else if(streq(str, "none")) {
3130 f->set = TRUE;
3131 f->inherit = FALSE;
3132 if (f->href && f->href->getObject())
3133 f->href->detach();
3134 } else if (strneq(str, "url", 3)) {
3135 char *uri = extract_uri(str);
3136 if(uri == NULL || uri[0] == '\0') {
3137 g_warning("Specified filter url is empty");
3138 f->set = TRUE;
3139 f->inherit = FALSE;
3140 return;
3141 }
3142 f->set = TRUE;
3143 f->inherit = FALSE;
3144 if (f->href && f->href->getObject())
3145 f->href->detach();
3147 // it may be that this style has not yet created its SPFilterReference;
3148 // now that we have a document, we can create it here
3149 if (!f->href && document) {
3150 f->href = new SPFilterReference(document);
3151 f->href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_filter_ref_changed), style));
3152 }
3154 try {
3155 f->href->attach(Inkscape::URI(uri));
3156 } catch (Inkscape::BadURIException &e) {
3157 g_warning("%s", e.what());
3158 f->href->detach();
3159 }
3160 g_free (uri);
3162 } else {
3163 /* We shouldn't reach this if SVG input is well-formed */
3164 f->set = FALSE;
3165 f->inherit = FALSE;
3166 if (f->href && f->href->getObject())
3167 f->href->detach();
3168 }
3169 }
3171 /**
3172 * Set SPIEnum object from repr attribute.
3173 */
3174 static void
3175 sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr,
3176 gchar const *key, SPStyleEnum const *dict,
3177 bool const can_explicitly_inherit)
3178 {
3179 gchar const *str = repr->attribute(key);
3180 if (str) {
3181 sp_style_read_ienum(val, str, dict, can_explicitly_inherit);
3182 }
3183 }
3187 /**
3188 * Set SPILength object from repr attribute.
3189 */
3190 static void
3191 sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key)
3192 {
3193 gchar const *str = repr->attribute(key);
3194 if (str) {
3195 sp_style_read_ilength(val, str);
3196 }
3197 }
3199 /**
3200 * Set SPIFontSize object from repr attribute.
3201 */
3202 static void
3203 sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key)
3204 {
3205 gchar const *str = repr->attribute(key);
3206 if (str) {
3207 sp_style_read_ifontsize(val, str);
3208 }
3209 }
3212 /**
3213 * Set SPIFloat object from repr attribute.
3214 */
3215 static void
3216 sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key)
3217 {
3218 gchar const *str = repr->attribute(key);
3219 if (str) {
3220 sp_style_read_ifloat(val, str);
3221 }
3222 }
3225 /**
3226 * Write SPIFloat object into string.
3227 */
3228 static gint
3229 sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key,
3230 SPIFloat const *const val, SPIFloat const *const base, guint const flags)
3231 {
3232 Inkscape::CSSOStringStream os;
3234 if ((flags & SP_STYLE_FLAG_ALWAYS)
3235 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3236 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3237 && (!base->set || (val->value != base->value))))
3238 {
3239 if (val->inherit) {
3240 return g_snprintf(p, len, "%s:inherit;", key);
3241 } else {
3242 os << key << ":" << val->value << ";";
3243 return g_strlcpy(p, os.str().c_str(), len);
3244 }
3245 }
3246 return 0;
3247 }
3250 /**
3251 * Write SPIScale24 object into string.
3252 */
3253 static gint
3254 sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key,
3255 SPIScale24 const *const val, SPIScale24 const *const base,
3256 guint const flags)
3257 {
3258 Inkscape::CSSOStringStream os;
3260 if ((flags & SP_STYLE_FLAG_ALWAYS)
3261 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3262 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3263 && (!base->set || (val->value != base->value))))
3264 {
3265 if (val->inherit) {
3266 return g_snprintf(p, len, "%s:inherit;", key);
3267 } else {
3268 os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";";
3269 return g_strlcpy(p, os.str().c_str(), len);
3270 }
3271 }
3272 return 0;
3273 }
3276 /**
3277 * Write SPIEnum object into string.
3278 */
3279 static gint
3280 sp_style_write_ienum(gchar *p, gint const len, gchar const *const key,
3281 SPStyleEnum const *const dict,
3282 SPIEnum const *const val, SPIEnum const *const base, guint const flags)
3283 {
3284 if ((flags & SP_STYLE_FLAG_ALWAYS)
3285 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3286 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3287 && (!base->set || (val->computed != base->computed))))
3288 {
3289 if (val->inherit) {
3290 return g_snprintf(p, len, "%s:inherit;", key);
3291 }
3292 for (unsigned i = 0; dict[i].key; i++) {
3293 if (dict[i].value == static_cast< gint > (val->value) ) {
3294 return g_snprintf(p, len, "%s:%s;", key, dict[i].key);
3295 }
3296 }
3297 }
3298 return 0;
3299 }
3303 /**
3304 * Write SPIString object into string.
3305 */
3306 static gint
3307 sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
3308 SPIString const *const val, SPIString const *const base, guint const flags)
3309 {
3310 if ((flags & SP_STYLE_FLAG_ALWAYS)
3311 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3312 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3313 && (!base->set || strcmp(val->value, base->value))))
3314 {
3315 if (val->inherit) {
3316 return g_snprintf(p, len, "%s:inherit;", key);
3317 } else {
3318 gchar *val_quoted = css2_escape_quote(val->value);
3319 return g_snprintf(p, len, "%s:%s;", key, val_quoted);
3320 g_free (val_quoted);
3321 }
3322 }
3323 return 0;
3324 }
3327 /**
3328 *
3329 */
3330 static bool
3331 sp_length_differ(SPILength const *const a, SPILength const *const b)
3332 {
3333 if (a->unit != b->unit) {
3334 if (a->unit == SP_CSS_UNIT_EM) return true;
3335 if (a->unit == SP_CSS_UNIT_EX) return true;
3336 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3337 if (b->unit == SP_CSS_UNIT_EM) return true;
3338 if (b->unit == SP_CSS_UNIT_EX) return true;
3339 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3340 }
3342 return (a->computed != b->computed);
3343 }
3347 /**
3348 * Write SPILength object into string.
3349 */
3350 static gint
3351 sp_style_write_ilength(gchar *p, gint const len, gchar const *const key,
3352 SPILength const *const val, SPILength const *const base, guint const flags)
3353 {
3354 Inkscape::CSSOStringStream os;
3356 if ((flags & SP_STYLE_FLAG_ALWAYS)
3357 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3358 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3359 && (!base->set || sp_length_differ(val, base))))
3360 {
3361 if (val->inherit) {
3362 return g_snprintf(p, len, "%s:inherit;", key);
3363 } else {
3364 switch (val->unit) {
3365 case SP_CSS_UNIT_NONE:
3366 os << key << ":" << val->computed << ";";
3367 return g_strlcpy(p, os.str().c_str(), len);
3368 break;
3369 case SP_CSS_UNIT_PX:
3370 os << key << ":" << val->computed << "px;";
3371 return g_strlcpy(p, os.str().c_str(), len);
3372 break;
3373 case SP_CSS_UNIT_PT:
3374 os << key << ":" << val->computed * PT_PER_PX << "pt;";
3375 return g_strlcpy(p, os.str().c_str(), len);
3376 break;
3377 case SP_CSS_UNIT_PC:
3378 os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;";
3379 return g_strlcpy(p, os.str().c_str(), len);
3380 break;
3381 case SP_CSS_UNIT_MM:
3382 os << key << ":" << val->computed * MM_PER_PX << "mm;";
3383 return g_strlcpy(p, os.str().c_str(), len);
3384 break;
3385 case SP_CSS_UNIT_CM:
3386 os << key << ":" << val->computed * CM_PER_PX << "cm;";
3387 return g_strlcpy(p, os.str().c_str(), len);
3388 break;
3389 case SP_CSS_UNIT_IN:
3390 os << key << ":" << val->computed * IN_PER_PX << "in;";
3391 return g_strlcpy(p, os.str().c_str(), len);
3392 break;
3393 case SP_CSS_UNIT_EM:
3394 os << key << ":" << val->value << "em;";
3395 return g_strlcpy(p, os.str().c_str(), len);
3396 break;
3397 case SP_CSS_UNIT_EX:
3398 os << key << ":" << val->value << "ex;";
3399 return g_strlcpy(p, os.str().c_str(), len);
3400 break;
3401 case SP_CSS_UNIT_PERCENT:
3402 os << key << ":" << (val->value * 100.0) << "%;";
3403 return g_strlcpy(p, os.str().c_str(), len);
3404 break;
3405 default:
3406 /* Invalid */
3407 break;
3408 }
3409 }
3410 }
3411 return 0;
3412 }
3415 /**
3416 *
3417 */
3418 static bool
3419 sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b)
3420 {
3421 if (a->normal != b->normal) return true;
3422 if (a->normal) return false;
3424 if (a->unit != b->unit) {
3425 if (a->unit == SP_CSS_UNIT_EM) return true;
3426 if (a->unit == SP_CSS_UNIT_EX) return true;
3427 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3428 if (b->unit == SP_CSS_UNIT_EM) return true;
3429 if (b->unit == SP_CSS_UNIT_EX) return true;
3430 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3431 }
3433 return (a->computed != b->computed);
3434 }
3436 /**
3437 * Write SPILengthOrNormal object into string.
3438 */
3439 static gint
3440 sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key,
3441 SPILengthOrNormal const *const val,
3442 SPILengthOrNormal const *const base,
3443 guint const flags)
3444 {
3445 if ((flags & SP_STYLE_FLAG_ALWAYS)
3446 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3447 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3448 && (!base->set || sp_lengthornormal_differ(val, base))))
3449 {
3450 if (val->normal) {
3451 return g_snprintf(p, len, "%s:normal;", key);
3452 } else {
3453 SPILength length;
3454 length.set = val->set;
3455 length.inherit = val->inherit;
3456 length.unit = val->unit;
3457 length.value = val->value;
3458 length.computed = val->computed;
3459 return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS);
3460 }
3461 }
3462 return 0;
3463 }
3465 /**
3466 *
3467 */
3468 static bool
3469 sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b)
3470 {
3471 return a->underline != b->underline
3472 || a->overline != b->overline
3473 || a->line_through != b->line_through
3474 || a->blink != b->blink;
3475 }
3477 /**
3478 * Write SPITextDecoration object into string.
3479 */
3480 static gint
3481 sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key,
3482 SPITextDecoration const *const val,
3483 SPITextDecoration const *const base,
3484 guint const flags)
3485 {
3486 Inkscape::CSSOStringStream os;
3488 if ((flags & SP_STYLE_FLAG_ALWAYS)
3489 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3490 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3491 && (!base->set || sp_textdecoration_differ(val, base))))
3492 {
3493 if (val->inherit) {
3494 return g_snprintf(p, len, "%s:inherit;", key);
3495 } else {
3496 os << key << ":";
3497 if (val->underline || val->overline || val->line_through || val->blink) {
3498 if (val->underline) os << " underline";
3499 if (val->overline) os << " overline";
3500 if (val->line_through) os << " line-through";
3501 if (val->blink) os << " blink";
3502 } else
3503 os << "none";
3504 os << ";";
3505 return g_strlcpy(p, os.str().c_str(), len);
3506 }
3507 }
3508 return 0;
3509 }
3511 /**
3512 *
3513 */
3514 static bool
3515 sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
3516 {
3517 if (a->type != b->type)
3518 return true;
3519 if (a->type == SP_PAINT_TYPE_COLOR)
3520 return !(sp_color_is_equal(&a->value.color, &b->value.color)
3521 && ((a->value.iccColor == b->value.iccColor)
3522 || (a->value.iccColor && b->value.iccColor
3523 && (a->value.iccColor->colorProfile == b->value.iccColor->colorProfile)
3524 && (a->value.iccColor->colors == b->value.iccColor->colors))));
3525 /* todo: Allow for epsilon differences in iccColor->colors, e.g. changes small enough not to show up
3526 * in the string representation. */
3527 if (a->type == SP_PAINT_TYPE_PAINTSERVER)
3528 return (a->value.href == NULL || b->value.href == NULL || a->value.href->getObject() != b->value.href->getObject());
3529 return false;
3530 }
3534 /**
3535 * Write SPIPaint object into string.
3536 */
3537 static gint
3538 sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
3539 SPIPaint const *const paint, SPIPaint const *const base, guint const flags)
3540 {
3541 if ((flags & SP_STYLE_FLAG_ALWAYS)
3542 || ((flags & SP_STYLE_FLAG_IFSET) && paint->set)
3543 || ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set
3544 && (!base->set || sp_paint_differ(paint, base))))
3545 {
3546 if (paint->inherit) {
3547 return g_snprintf(b, len, "%s:inherit;", key);
3548 } else if (paint->currentcolor) {
3549 return g_snprintf(b, len, "%s:currentColor;", key);
3550 } else {
3551 switch (paint->type) {
3552 case SP_PAINT_TYPE_COLOR: {
3553 char color_buf[8];
3554 sp_svg_write_color(color_buf, sizeof(color_buf), sp_color_get_rgba32_ualpha(&paint->value.color, 0));
3555 if (paint->value.iccColor) {
3556 CSSOStringStream css;
3557 css << color_buf << " icc-color(" << paint->value.iccColor->colorProfile;
3558 for (vector<double>::const_iterator i(paint->value.iccColor->colors.begin()),
3559 iEnd(paint->value.iccColor->colors.end());
3560 i != iEnd; ++i) {
3561 css << ", " << *i;
3562 }
3563 css << ')';
3564 return g_snprintf(b, len, "%s:%s;", key, css.gcharp());
3565 } else {
3566 return g_snprintf(b, len, "%s:%s;", key, color_buf);
3567 }
3568 }
3569 case SP_PAINT_TYPE_PAINTSERVER:
3570 return g_snprintf(b, len, "%s:url(%s);", key, paint->value.href? paint->value.href->getURI()->toString() : "");
3571 default:
3572 break;
3573 }
3574 return g_snprintf(b, len, "%s:none;", key);
3575 }
3576 }
3577 return 0;
3578 }
3581 /**
3582 *
3583 */
3584 static bool
3585 sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b)
3586 {
3587 if (a->type != b->type)
3588 return true;
3589 if (a->type == SP_FONT_SIZE_LENGTH) {
3590 if (a->computed != b->computed)
3591 return true;
3592 } else {
3593 if (a->value != b->value)
3594 return true;
3595 }
3596 return false;
3597 }
3600 /**
3601 * Write SPIFontSize object into string.
3602 */
3603 static gint
3604 sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key,
3605 SPIFontSize const *const val, SPIFontSize const *const base,
3606 guint const flags)
3607 {
3608 if ((flags & SP_STYLE_FLAG_ALWAYS)
3609 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3610 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3611 && (!base->set || sp_fontsize_differ(val, base))))
3612 {
3613 if (val->inherit) {
3614 return g_snprintf(p, len, "%s:inherit;", key);
3615 } else if (val->type == SP_FONT_SIZE_LITERAL) {
3616 for (unsigned i = 0; enum_font_size[i].key; i++) {
3617 if (enum_font_size[i].value == static_cast< gint > (val->value) ) {
3618 return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key);
3619 }
3620 }
3621 } else if (val->type == SP_FONT_SIZE_LENGTH) {
3622 Inkscape::CSSOStringStream os;
3623 os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
3624 return g_strlcpy(p, os.str().c_str(), len);
3625 } else if (val->type == SP_FONT_SIZE_PERCENTAGE) {
3626 Inkscape::CSSOStringStream os;
3627 os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;";
3628 return g_strlcpy(p, os.str().c_str(), len);
3629 }
3630 }
3631 return 0;
3632 }
3635 /**
3636 * Write SPIFilter object into string.
3637 */
3638 static gint
3639 sp_style_write_ifilter(gchar *p, gint const len, gchar const *key,
3640 SPIFilter const *const val, SPIFilter const *const base,
3641 guint const flags)
3642 {
3643 if ((flags & SP_STYLE_FLAG_ALWAYS)
3644 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3645 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set))
3646 {
3647 if (val->inherit) {
3648 return g_snprintf(p, len, "%s:inherit;", key);
3649 } else if (val->href && val->href->getURI()) {
3650 return g_snprintf(p, len, "%s:url(%s);", key, val->href->getURI()->toString());
3651 }
3652 }
3655 return 0;
3656 }
3659 /**
3660 * Clear paint object, and disconnect style from paintserver (if present).
3661 */
3662 static void
3663 sp_style_paint_clear(SPStyle *style, SPIPaint *paint)
3664 {
3665 if (paint->value.href && paint->value.href->getObject())
3666 paint->value.href->detach();
3668 paint->type = SP_PAINT_TYPE_NONE;
3669 delete paint->value.iccColor;
3670 paint->value.iccColor = NULL;
3671 }
3674 /**
3675 * Clear filter object, and disconnect style from paintserver (if present).
3676 */
3677 static void
3678 sp_style_filter_clear(SPStyle *style)
3679 {
3680 if (style->filter.href && style->filter.href->getObject())
3681 style->filter.href->detach();
3682 }
3685 // FIXME: Everything below this line belongs in a different file - css-chemistry?
3687 void
3688 sp_style_set_property_url (SPObject *item, gchar const *property, SPObject *linked, bool recursive)
3689 {
3690 Inkscape::XML::Node *repr = SP_OBJECT_REPR(item);
3692 if (repr == NULL) return;
3694 g_return_if_fail(linked != NULL);
3696 gchar *val = g_strdup_printf("url(#%s)", SP_OBJECT_ID(linked));
3698 SPCSSAttr *css = sp_repr_css_attr_new();
3699 sp_repr_css_set_property(css, property, val);
3700 g_free(val);
3701 if (recursive) {
3702 sp_repr_css_change_recursive(repr, css, "style");
3703 } else {
3704 sp_repr_css_change(repr, css, "style");
3705 }
3706 sp_repr_css_attr_unref(css);
3707 }
3710 /**
3711 * Clear all style property attributes in object.
3712 */
3713 void
3714 sp_style_unset_property_attrs(SPObject *o)
3715 {
3716 if (!o) return;
3718 SPStyle *style = SP_OBJECT_STYLE(o);
3719 if (!style) return;
3721 Inkscape::XML::Node *repr = SP_OBJECT_REPR(o);
3722 if (!repr) return;
3724 if (style->opacity.set) {
3725 repr->setAttribute("opacity", NULL);
3726 }
3727 if (style->color.set) {
3728 repr->setAttribute("color", NULL);
3729 }
3730 if (style->fill.set) {
3731 repr->setAttribute("fill", NULL);
3732 }
3733 if (style->fill_opacity.set) {
3734 repr->setAttribute("fill-opacity", NULL);
3735 }
3736 if (style->fill_rule.set) {
3737 repr->setAttribute("fill-rule", NULL);
3738 }
3739 if (style->stroke.set) {
3740 repr->setAttribute("stroke", NULL);
3741 }
3742 if (style->stroke_width.set) {
3743 repr->setAttribute("stroke-width", NULL);
3744 }
3745 if (style->stroke_linecap.set) {
3746 repr->setAttribute("stroke-linecap", NULL);
3747 }
3748 if (style->stroke_linejoin.set) {
3749 repr->setAttribute("stroke-linejoin", NULL);
3750 }
3751 if (style->marker[SP_MARKER_LOC].set) {
3752 repr->setAttribute("marker", NULL);
3753 }
3754 if (style->marker[SP_MARKER_LOC_START].set) {
3755 repr->setAttribute("marker-start", NULL);
3756 }
3757 if (style->marker[SP_MARKER_LOC_MID].set) {
3758 repr->setAttribute("marker-mid", NULL);
3759 }
3760 if (style->marker[SP_MARKER_LOC_END].set) {
3761 repr->setAttribute("marker-end", NULL);
3762 }
3763 if (style->stroke_opacity.set) {
3764 repr->setAttribute("stroke-opacity", NULL);
3765 }
3766 if (style->stroke_dasharray_set) {
3767 repr->setAttribute("stroke-dasharray", NULL);
3768 }
3769 if (style->stroke_dashoffset_set) {
3770 repr->setAttribute("stroke-dashoffset", NULL);
3771 }
3772 if (style->text_private && style->text->font_family.set) {
3773 repr->setAttribute("font-family", NULL);
3774 }
3775 if (style->text_anchor.set) {
3776 repr->setAttribute("text-anchor", NULL);
3777 }
3778 if (style->writing_mode.set) {
3779 repr->setAttribute("writing_mode", NULL);
3780 }
3781 if (style->filter.set) {
3782 repr->setAttribute("filter", NULL);
3783 }
3784 if (style->enable_background.set) {
3785 repr->setAttribute("enable-background", NULL);
3786 }
3787 }
3789 /**
3790 * \pre style != NULL.
3791 * \pre flags in {IFSET, ALWAYS}.
3792 */
3793 SPCSSAttr *
3794 sp_css_attr_from_style(SPStyle const *const style, guint const flags)
3795 {
3796 g_return_val_if_fail(style != NULL, NULL);
3797 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3798 (flags == SP_STYLE_FLAG_ALWAYS) ),
3799 NULL);
3800 gchar *style_str = sp_style_write_string(style, flags);
3801 SPCSSAttr *css = sp_repr_css_attr_new();
3802 sp_repr_css_attr_add_from_string(css, style_str);
3803 g_free(style_str);
3804 return css;
3805 }
3808 /**
3809 * \pre object != NULL
3810 * \pre flags in {IFSET, ALWAYS}.
3811 */
3812 SPCSSAttr *
3813 sp_css_attr_from_object(SPObject *object, guint const flags)
3814 {
3815 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3816 (flags == SP_STYLE_FLAG_ALWAYS) ),
3817 NULL);
3818 SPStyle const *const style = SP_OBJECT_STYLE(object);
3819 if (style == NULL)
3820 return NULL;
3821 return sp_css_attr_from_style(style, flags);
3822 }
3824 /**
3825 * Unset any text-related properties
3826 */
3827 SPCSSAttr *
3828 sp_css_attr_unset_text(SPCSSAttr *css)
3829 {
3830 sp_repr_css_set_property(css, "font", NULL); // not implemented yet
3831 sp_repr_css_set_property(css, "font-size", NULL);
3832 sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet
3833 sp_repr_css_set_property(css, "font-style", NULL);
3834 sp_repr_css_set_property(css, "font-variant", NULL);
3835 sp_repr_css_set_property(css, "font-weight", NULL);
3836 sp_repr_css_set_property(css, "font-stretch", NULL);
3837 sp_repr_css_set_property(css, "font-family", NULL);
3838 sp_repr_css_set_property(css, "text-indent", NULL);
3839 sp_repr_css_set_property(css, "text-align", NULL);
3840 sp_repr_css_set_property(css, "text-decoration", NULL);
3841 sp_repr_css_set_property(css, "line-height", NULL);
3842 sp_repr_css_set_property(css, "letter-spacing", NULL);
3843 sp_repr_css_set_property(css, "word-spacing", NULL);
3844 sp_repr_css_set_property(css, "text-transform", NULL);
3845 sp_repr_css_set_property(css, "direction", NULL);
3846 sp_repr_css_set_property(css, "block-progression", NULL);
3847 sp_repr_css_set_property(css, "writing-mode", NULL);
3848 sp_repr_css_set_property(css, "text-anchor", NULL);
3849 sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet
3850 sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet
3851 sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet
3852 sp_repr_css_set_property(css, "baseline-shift", NULL); // not implemented yet
3854 return css;
3855 }
3857 bool
3858 is_url(char const *p)
3859 {
3860 if (p == NULL)
3861 return false;
3862 /** \todo
3863 * FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs
3864 * in property values must start with 'url('.
3865 */
3866 return (g_ascii_strncasecmp(p, "url(", 4) == 0);
3867 }
3869 /**
3870 * Unset any properties that contain URI values.
3871 *
3872 * Used for storing style that will be reused across documents when carrying
3873 * the referenced defs is impractical.
3874 */
3875 SPCSSAttr *
3876 sp_css_attr_unset_uris(SPCSSAttr *css)
3877 {
3878 // All properties that may hold <uri> or <paint> according to SVG 1.1
3879 if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL);
3880 if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL);
3881 if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL);
3882 if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL);
3883 if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL);
3884 if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL);
3885 if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL);
3886 if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL);
3887 if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL);
3888 if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL);
3890 return css;
3891 }
3893 /**
3894 * Scale a single-value property.
3895 */
3896 void
3897 sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property,
3898 double ex, bool only_with_units = false)
3899 {
3900 gchar const *w = sp_repr_css_property(css, property, NULL);
3901 if (w) {
3902 gchar *units = NULL;
3903 double wd = g_ascii_strtod(w, &units) * ex;
3904 if (w == units) {// nothing converted, non-numeric value
3905 return;
3906 }
3907 if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) {
3908 // only_with_units, but no units found, so do nothing.
3909 return;
3910 }
3911 Inkscape::CSSOStringStream os;
3912 os << wd << units; // reattach units
3913 sp_repr_css_set_property(css, property, os.str().c_str());
3914 }
3915 }
3917 /**
3918 * Scale a list-of-values property.
3919 */
3920 void
3921 sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex)
3922 {
3923 gchar const *string = sp_repr_css_property(css, property, NULL);
3924 if (string) {
3925 Inkscape::CSSOStringStream os;
3926 gchar **a = g_strsplit(string, ",", 10000);
3927 bool first = true;
3928 for (gchar **i = a; i != NULL; i++) {
3929 gchar *w = *i;
3930 if (w == NULL)
3931 break;
3932 gchar *units = NULL;
3933 double wd = g_ascii_strtod(w, &units) * ex;
3934 if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing
3935 g_strfreev(a);
3936 return;
3937 }
3938 if (!first) {
3939 os << ",";
3940 }
3941 os << wd << units; // reattach units
3942 first = false;
3943 }
3944 sp_repr_css_set_property(css, property, os.str().c_str());
3945 g_strfreev(a);
3946 }
3947 }
3949 /**
3950 * Scale any properties that may hold <length> by ex.
3951 */
3952 SPCSSAttr *
3953 sp_css_attr_scale(SPCSSAttr *css, double ex)
3954 {
3955 sp_css_attr_scale_property_single(css, "baseline-shift", ex);
3956 sp_css_attr_scale_property_single(css, "stroke-width", ex);
3957 sp_css_attr_scale_property_list (css, "stroke-dasharray", ex);
3958 sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex);
3959 sp_css_attr_scale_property_single(css, "font-size", ex);
3960 sp_css_attr_scale_property_single(css, "kerning", ex);
3961 sp_css_attr_scale_property_single(css, "letter-spacing", ex);
3962 sp_css_attr_scale_property_single(css, "word-spacing", ex);
3963 sp_css_attr_scale_property_single(css, "line-height", ex, true);
3965 return css;
3966 }
3969 /**
3970 * Remove quotes and escapes from a string. Returned value must be g_free'd.
3971 * Note: in CSS (in style= and in stylesheets), unquoting and unescaping is done
3972 * by libcroco, our CSS parser, though it adds a new pair of "" quotes for the strings
3973 * it parsed for us. So this function is only used to remove those quotes and for
3974 * presentation attributes, without any unescaping. (XML unescaping
3975 * (& etc) is done by XML parser.)
3976 */
3977 gchar *
3978 attribute_unquote(gchar const *val)
3979 {
3980 if (val) {
3981 if (*val == '\'' || *val == '"') {
3982 int l = strlen(val);
3983 if (l >= 2) {
3984 if ( ( val[0] == '"' && val[l - 1] == '"' ) ||
3985 ( val[0] == '\'' && val[l - 1] == '\'' ) ) {
3986 return (g_strndup (val+1, l-2));
3987 }
3988 }
3989 }
3990 }
3992 return (val? g_strdup (val) : NULL);
3993 }
3995 /**
3996 * Quote and/or escape string for writing to CSS (style=). Returned value must be g_free'd.
3997 */
3998 gchar *
3999 css2_escape_quote(gchar const *val) {
4001 Glib::ustring t;
4002 bool quote = false;
4003 bool last_was_space = false;
4005 for (gchar const *i = val; *i; i++) {
4006 bool is_space = ( *i == ' ' );
4007 if (g_ascii_isalnum(*i) || *i=='-' || *i=='_') {
4008 // ASCII alphanumeric, - and _ don't require quotes
4009 t.push_back(*i);
4010 } else if ( is_space && !last_was_space ) {
4011 // non-consecutive spaces don't require quotes
4012 t.push_back(*i);
4013 } else if (*i=='\'') {
4014 // single quotes require escaping and quotes
4015 t.push_back('\\');
4016 t.push_back(*i);
4017 quote = true;
4018 } else {
4019 // everything else requires quotes
4020 t.push_back(*i);
4021 quote = true;
4022 }
4023 if (i == val && !g_ascii_isalpha(*i)) {
4024 // a non-ASCII/non-alpha initial character requires quotes
4025 quote = true;
4026 }
4027 last_was_space = is_space;
4028 }
4030 if (last_was_space) {
4031 // a trailing space requires quotes
4032 quote = true;
4033 }
4035 if (quote) {
4036 // we use single quotes so the result can be stored in an XML
4037 // attribute without incurring un-aesthetic additional quoting
4038 // (our XML emitter always uses double quotes)
4039 t.insert(t.begin(), '\'');
4040 t.push_back('\'');
4041 }
4043 return (t.empty() ? NULL : g_strdup (t.c_str()));
4044 }
4046 /*
4047 Local Variables:
4048 mode:c++
4049 c-file-style:"stroustrup"
4050 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
4051 indent-tabs-mode:nil
4052 fill-column:99
4053 End:
4054 */
4055 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :