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 "sp-paint-server.h"
35 #include "streq.h"
36 #include "strneq.h"
37 #include "style.h"
38 #include "svg/css-ostringstream.h"
39 #include "xml/repr.h"
40 #include "unit-constants.h"
41 #include "isnan.h"
43 #include <sigc++/functors/ptr_fun.h>
44 #include <sigc++/adaptors/bind.h>
46 using Inkscape::CSSOStringStream;
47 using std::vector;
49 namespace Inkscape {
51 /**
52 * Parses a CSS url() specification; temporary hack until
53 * style stuff is redone.
54 * \param string the CSS string to parse
55 * \return a newly-allocated URL string (or NULL); free with g_free()
56 */
57 gchar *parse_css_url(gchar const *string) {
58 if (!string)
59 return NULL;
61 gchar const *iter = string;
62 for ( ; g_ascii_isspace(*iter) ; iter = g_utf8_next_char(iter) );
63 if (strncmp(iter, "url(", 4))
64 return NULL;
65 iter += 4;
67 gchar const end_char = *iter;
68 if ( *iter == '"' || *iter == '\'' ) {
69 iter += 1;
70 }
72 GString *temp = g_string_new(NULL);
73 for ( ; *iter ; iter = g_utf8_next_char(iter) ) {
74 if ( *iter == '(' || *iter == ')' ||
75 *iter == '"' || *iter == '\'' ||
76 g_ascii_isspace(*iter) ||
77 g_ascii_iscntrl(*iter) )
78 {
79 break;
80 }
81 if ( *iter == '\\' ) {
82 iter = g_utf8_next_char(iter);
83 }
84 if ( *iter & (gchar)0x80 ) {
85 break;
86 } else {
87 g_string_append_c(temp, *iter);
88 }
89 }
91 if ( *iter == end_char && end_char != ')' ) {
92 iter = g_utf8_next_char(iter);
93 }
94 gchar *result;
95 if ( *iter == ')' ) {
96 result = temp->str;
97 g_string_free(temp, FALSE);
98 } else {
99 result = NULL;
100 g_string_free(temp, TRUE);
101 }
103 return result;
104 }
106 }
108 #define BMAX 8192
110 class SPStyleEnum;
112 /*#########################
113 ## FORWARD DECLARATIONS
114 #########################*/
115 static void sp_style_clear(SPStyle *style);
117 static void sp_style_merge_property(SPStyle *style, gint id, gchar const *val);
119 static void sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent);
120 static void sp_style_merge_ifilter(SPStyle *style, SPIFilter const *parent);
121 static void sp_style_read_dash(SPStyle *style, gchar const *str);
123 static SPTextStyle *sp_text_style_new(void);
124 static void sp_text_style_clear(SPTextStyle *ts);
125 static SPTextStyle *sp_text_style_unref(SPTextStyle *st);
126 static SPTextStyle *sp_text_style_duplicate_unset(SPTextStyle *st);
127 static guint sp_text_style_write(gchar *p, guint len, SPTextStyle const *st, guint flags = SP_STYLE_FLAG_IFSET);
128 static void sp_style_privatize_text(SPStyle *style);
130 static void sp_style_read_ifloat(SPIFloat *val, gchar const *str);
131 static void sp_style_read_iscale24(SPIScale24 *val, gchar const *str);
132 static void sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict, bool can_explicitly_inherit);
133 static void sp_style_read_istring(SPIString *val, gchar const *str);
134 static void sp_style_read_ilength(SPILength *val, gchar const *str);
135 static void sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str);
136 static void sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str);
137 static void sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
138 static void sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
139 static void sp_style_read_ifontsize(SPIFontSize *val, gchar const *str);
140 static void sp_style_read_ifilter(gchar const *str, SPStyle *style, SPDocument *document);
142 static void sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr, gchar const *key, SPStyleEnum const *dict, bool can_explicitly_inherit);
143 static void sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key);
144 static void sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key);
145 static void sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key);
147 static gint sp_style_write_ifloat(gchar *p, gint len, gchar const *key, SPIFloat const *val, SPIFloat const *base, guint flags);
148 static gint sp_style_write_iscale24(gchar *p, gint len, gchar const *key, SPIScale24 const *val, SPIScale24 const *base, guint flags);
149 static gint sp_style_write_ienum(gchar *p, gint len, gchar const *key, SPStyleEnum const *dict, SPIEnum const *val, SPIEnum const *base, guint flags);
150 static gint sp_style_write_istring(gchar *p, gint len, gchar const *key, SPIString const *val, SPIString const *base, guint flags);
151 static gint sp_style_write_ilength(gchar *p, gint len, gchar const *key, SPILength const *val, SPILength const *base, guint flags);
152 static gint sp_style_write_ipaint(gchar *b, gint len, gchar const *key, SPIPaint const *paint, SPIPaint const *base, guint flags);
153 static gint sp_style_write_ifontsize(gchar *p, gint len, gchar const *key, SPIFontSize const *val, SPIFontSize const *base, guint flags);
154 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);
155 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);
156 static gint sp_style_write_ifilter(gchar *b, gint len, gchar const *key, SPIFilter const *filter, SPIFilter const *base, guint flags);
158 static void css2_unescape_unquote(SPIString *val);
160 static void sp_style_paint_clear(SPStyle *style, SPIPaint *paint);
162 static void sp_style_filter_clear(SPStyle *style);
164 #define SPS_READ_IENUM_IF_UNSET(v,s,d,i) if (!(v)->set) {sp_style_read_ienum((v), (s), (d), (i));}
165 #define SPS_READ_PENUM_IF_UNSET(v,r,k,d,i) if (!(v)->set) {sp_style_read_penum((v), (r), (k), (d), (i));}
167 #define SPS_READ_ILENGTH_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ilength((v), (s));}
168 #define SPS_READ_PLENGTH_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_plength((v), (r), (k));}
170 #define SPS_READ_PFLOAT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfloat((v), (r), (k));}
172 #define SPS_READ_IFONTSIZE_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ifontsize((v), (s));}
173 #define SPS_READ_PFONTSIZE_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfontsize((v), (r), (k));}
175 static void sp_style_merge_from_object_stylesheet(SPStyle *, SPObject const *);
177 struct SPStyleEnum {
178 gchar const *key;
179 gint value;
180 };
182 static SPStyleEnum const enum_fill_rule[] = {
183 {"nonzero", SP_WIND_RULE_NONZERO},
184 {"evenodd", SP_WIND_RULE_EVENODD},
185 {NULL, -1}
186 };
188 static SPStyleEnum const enum_stroke_linecap[] = {
189 {"butt", SP_STROKE_LINECAP_BUTT},
190 {"round", SP_STROKE_LINECAP_ROUND},
191 {"square", SP_STROKE_LINECAP_SQUARE},
192 {NULL, -1}
193 };
195 static SPStyleEnum const enum_stroke_linejoin[] = {
196 {"miter", SP_STROKE_LINEJOIN_MITER},
197 {"round", SP_STROKE_LINEJOIN_ROUND},
198 {"bevel", SP_STROKE_LINEJOIN_BEVEL},
199 {NULL, -1}
200 };
202 static SPStyleEnum const enum_font_style[] = {
203 {"normal", SP_CSS_FONT_STYLE_NORMAL},
204 {"italic", SP_CSS_FONT_STYLE_ITALIC},
205 {"oblique", SP_CSS_FONT_STYLE_OBLIQUE},
206 {NULL, -1}
207 };
209 static SPStyleEnum const enum_font_size[] = {
210 {"xx-small", SP_CSS_FONT_SIZE_XX_SMALL},
211 {"x-small", SP_CSS_FONT_SIZE_X_SMALL},
212 {"small", SP_CSS_FONT_SIZE_SMALL},
213 {"medium", SP_CSS_FONT_SIZE_MEDIUM},
214 {"large", SP_CSS_FONT_SIZE_LARGE},
215 {"x-large", SP_CSS_FONT_SIZE_X_LARGE},
216 {"xx-large", SP_CSS_FONT_SIZE_XX_LARGE},
217 {"smaller", SP_CSS_FONT_SIZE_SMALLER},
218 {"larger", SP_CSS_FONT_SIZE_LARGER},
219 {NULL, -1}
220 };
222 static SPStyleEnum const enum_font_variant[] = {
223 {"normal", SP_CSS_FONT_VARIANT_NORMAL},
224 {"small-caps", SP_CSS_FONT_VARIANT_SMALL_CAPS},
225 {NULL, -1}
226 };
228 static SPStyleEnum const enum_font_weight[] = {
229 {"100", SP_CSS_FONT_WEIGHT_100},
230 {"200", SP_CSS_FONT_WEIGHT_200},
231 {"300", SP_CSS_FONT_WEIGHT_300},
232 {"400", SP_CSS_FONT_WEIGHT_400},
233 {"500", SP_CSS_FONT_WEIGHT_500},
234 {"600", SP_CSS_FONT_WEIGHT_600},
235 {"700", SP_CSS_FONT_WEIGHT_700},
236 {"800", SP_CSS_FONT_WEIGHT_800},
237 {"900", SP_CSS_FONT_WEIGHT_900},
238 {"normal", SP_CSS_FONT_WEIGHT_NORMAL},
239 {"bold", SP_CSS_FONT_WEIGHT_BOLD},
240 {"lighter", SP_CSS_FONT_WEIGHT_LIGHTER},
241 {"bolder", SP_CSS_FONT_WEIGHT_BOLDER},
242 {NULL, -1}
243 };
245 static SPStyleEnum const enum_font_stretch[] = {
246 {"ultra-condensed", SP_CSS_FONT_STRETCH_ULTRA_CONDENSED},
247 {"extra-condensed", SP_CSS_FONT_STRETCH_EXTRA_CONDENSED},
248 {"condensed", SP_CSS_FONT_STRETCH_CONDENSED},
249 {"semi-condensed", SP_CSS_FONT_STRETCH_SEMI_CONDENSED},
250 {"normal", SP_CSS_FONT_STRETCH_NORMAL},
251 {"semi-expanded", SP_CSS_FONT_STRETCH_SEMI_EXPANDED},
252 {"expanded", SP_CSS_FONT_STRETCH_EXPANDED},
253 {"extra-expanded", SP_CSS_FONT_STRETCH_EXTRA_EXPANDED},
254 {"ultra-expanded", SP_CSS_FONT_STRETCH_ULTRA_EXPANDED},
255 {"narrower", SP_CSS_FONT_STRETCH_NARROWER},
256 {"wider", SP_CSS_FONT_STRETCH_WIDER},
257 {NULL, -1}
258 };
260 static SPStyleEnum const enum_text_align[] = {
261 {"start", SP_CSS_TEXT_ALIGN_START},
262 {"end", SP_CSS_TEXT_ALIGN_END},
263 {"left", SP_CSS_TEXT_ALIGN_LEFT},
264 {"right", SP_CSS_TEXT_ALIGN_RIGHT},
265 {"center", SP_CSS_TEXT_ALIGN_CENTER},
266 {"justify", SP_CSS_TEXT_ALIGN_JUSTIFY},
267 {NULL, -1}
268 };
270 static SPStyleEnum const enum_text_transform[] = {
271 {"capitalize", SP_CSS_TEXT_TRANSFORM_CAPITALIZE},
272 {"uppercase", SP_CSS_TEXT_TRANSFORM_UPPERCASE},
273 {"lowercase", SP_CSS_TEXT_TRANSFORM_LOWERCASE},
274 {"none", SP_CSS_TEXT_TRANSFORM_NONE},
275 {NULL, -1}
276 };
278 static SPStyleEnum const enum_text_anchor[] = {
279 {"start", SP_CSS_TEXT_ANCHOR_START},
280 {"middle", SP_CSS_TEXT_ANCHOR_MIDDLE},
281 {"end", SP_CSS_TEXT_ANCHOR_END},
282 {NULL, -1}
283 };
285 static SPStyleEnum const enum_direction[] = {
286 {"ltr", SP_CSS_DIRECTION_LTR},
287 {"rtl", SP_CSS_DIRECTION_RTL},
288 {NULL, -1}
289 };
291 static SPStyleEnum const enum_block_progression[] = {
292 {"tb", SP_CSS_BLOCK_PROGRESSION_TB},
293 {"rl", SP_CSS_BLOCK_PROGRESSION_RL},
294 {"lr", SP_CSS_BLOCK_PROGRESSION_LR},
295 {NULL, -1}
296 };
298 static SPStyleEnum const enum_writing_mode[] = {
299 /* Note that using the same enumerator for lr as lr-tb means we write as lr-tb even if the
300 * input file said lr. We prefer writing lr-tb on the grounds that the spec says the initial
301 * value is lr-tb rather than lr.
302 *
303 * ECMA scripts may be surprised to find tb-rl in DOM if they set the attribute to rl, so
304 * sharing enumerators for different strings may be a bug (once we support ecma script).
305 */
306 {"lr-tb", SP_CSS_WRITING_MODE_LR_TB},
307 {"rl-tb", SP_CSS_WRITING_MODE_RL_TB},
308 {"tb-rl", SP_CSS_WRITING_MODE_TB_RL},
309 {"lr", SP_CSS_WRITING_MODE_LR_TB},
310 {"rl", SP_CSS_WRITING_MODE_RL_TB},
311 {"tb", SP_CSS_WRITING_MODE_TB_RL},
312 {NULL, -1}
313 };
315 static SPStyleEnum const enum_visibility[] = {
316 {"hidden", SP_CSS_VISIBILITY_HIDDEN},
317 {"collapse", SP_CSS_VISIBILITY_COLLAPSE},
318 {"visible", SP_CSS_VISIBILITY_VISIBLE},
319 {NULL, -1}
320 };
322 static SPStyleEnum const enum_overflow[] = {
323 {"visible", SP_CSS_OVERFLOW_VISIBLE},
324 {"hidden", SP_CSS_OVERFLOW_HIDDEN},
325 {"scroll", SP_CSS_OVERFLOW_SCROLL},
326 {"auto", SP_CSS_OVERFLOW_AUTO},
327 {NULL, -1}
328 };
330 static SPStyleEnum const enum_display[] = {
331 {"none", SP_CSS_DISPLAY_NONE},
332 {"inline", SP_CSS_DISPLAY_INLINE},
333 {"block", SP_CSS_DISPLAY_BLOCK},
334 {"list-item", SP_CSS_DISPLAY_LIST_ITEM},
335 {"run-in", SP_CSS_DISPLAY_RUN_IN},
336 {"compact", SP_CSS_DISPLAY_COMPACT},
337 {"marker", SP_CSS_DISPLAY_MARKER},
338 {"table", SP_CSS_DISPLAY_TABLE},
339 {"inline-table", SP_CSS_DISPLAY_INLINE_TABLE},
340 {"table-row-group", SP_CSS_DISPLAY_TABLE_ROW_GROUP},
341 {"table-header-group", SP_CSS_DISPLAY_TABLE_HEADER_GROUP},
342 {"table-footer-group", SP_CSS_DISPLAY_TABLE_FOOTER_GROUP},
343 {"table-row", SP_CSS_DISPLAY_TABLE_ROW},
344 {"table-column-group", SP_CSS_DISPLAY_TABLE_COLUMN_GROUP},
345 {"table-column", SP_CSS_DISPLAY_TABLE_COLUMN},
346 {"table-cell", SP_CSS_DISPLAY_TABLE_CELL},
347 {"table-caption", SP_CSS_DISPLAY_TABLE_CAPTION},
348 {NULL, -1}
349 };
351 static SPStyleEnum const enum_shape_rendering[] = {
352 {"auto", 0},
353 {"optimizeSpeed", 0},
354 {"crispEdges", 0},
355 {"geometricPrecision", 0},
356 {NULL, -1}
357 };
359 static SPStyleEnum const enum_color_rendering[] = {
360 {"auto", 0},
361 {"optimizeSpeed", 0},
362 {"optimizeQuality", 0},
363 {NULL, -1}
364 };
366 static SPStyleEnum const *const enum_image_rendering = enum_color_rendering;
368 static SPStyleEnum const enum_text_rendering[] = {
369 {"auto", 0},
370 {"optimizeSpeed", 0},
371 {"optimizeLegibility", 0},
372 {"geometricPrecision", 0},
373 {NULL, -1}
374 };
376 static SPStyleEnum const enum_enable_background[] = {
377 {"accumulate", SP_CSS_BACKGROUND_ACCUMULATE},
378 {"new", SP_CSS_BACKGROUND_NEW},
379 {NULL, -1}
380 };
382 /**
383 * Release callback.
384 */
385 static void
386 sp_style_object_release(SPObject *object, SPStyle *style)
387 {
388 style->object = NULL;
389 }
394 /**
395 * Returns a new SPStyle object with settings as per sp_style_clear().
396 */
397 SPStyle *
398 sp_style_new()
399 {
400 SPStyle *const style = g_new0(SPStyle, 1);
402 style->refcount = 1;
403 style->object = NULL;
404 style->text = sp_text_style_new();
405 style->text_private = TRUE;
407 sp_style_clear(style);
409 style->cloned = false;
411 style->fill_hreffed = false;
412 style->stroke_hreffed = false;
413 style->filter_hreffed = false;
415 new (&style->release_connection) sigc::connection();
417 new (&style->fill_release_connection) sigc::connection();
418 new (&style->fill_modified_connection) sigc::connection();
420 new (&style->stroke_release_connection) sigc::connection();
421 new (&style->stroke_modified_connection) sigc::connection();
423 new (&style->filter_release_connection) sigc::connection();
424 new (&style->filter_modified_connection) sigc::connection();
426 return style;
427 }
430 /**
431 * Creates a new SPStyle object, and attaches it to the specified SPObject.
432 */
433 SPStyle *
434 sp_style_new_from_object(SPObject *object)
435 {
436 g_return_val_if_fail(object != NULL, NULL);
437 g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
439 SPStyle *style = sp_style_new();
440 style->object = object;
441 style->release_connection = object->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_object_release), style));
443 if (object && SP_OBJECT_IS_CLONED(object)) {
444 style->cloned = true;
445 }
447 return style;
448 }
451 /**
452 * Increase refcount of style.
453 */
454 SPStyle *
455 sp_style_ref(SPStyle *style)
456 {
457 g_return_val_if_fail(style != NULL, NULL);
458 g_return_val_if_fail(style->refcount > 0, NULL);
460 style->refcount += 1;
462 return style;
463 }
466 /**
467 * Decrease refcount of style with possible destruction.
468 */
469 SPStyle *
470 sp_style_unref(SPStyle *style)
471 {
472 g_return_val_if_fail(style != NULL, NULL);
473 g_return_val_if_fail(style->refcount > 0, NULL);
475 style->refcount -= 1;
477 if (style->refcount < 1) {
478 style->release_connection.disconnect();
479 style->release_connection.~connection();
480 if (style->text) sp_text_style_unref(style->text);
481 sp_style_paint_clear(style, &style->fill);
482 sp_style_paint_clear(style, &style->stroke);
483 sp_style_filter_clear(style);
484 style->fill_release_connection.disconnect();
485 style->fill_release_connection.~connection();
486 style->fill_modified_connection.disconnect();
487 style->fill_modified_connection.~connection();
488 style->stroke_release_connection.disconnect();
489 style->stroke_release_connection.~connection();
490 style->stroke_modified_connection.disconnect();
491 style->stroke_modified_connection.~connection();
492 style->filter_modified_connection.disconnect();
493 style->filter_modified_connection.~connection();
494 style->filter_release_connection.disconnect();
495 style->filter_release_connection.~connection();
496 g_free(style->stroke_dash.dash);
497 g_free(style);
498 }
500 return NULL;
501 }
503 /**
504 * Reads the various style parameters for an object from repr.
505 */
506 static void
507 sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
508 {
509 g_assert(style != NULL);
510 g_assert(repr != NULL);
511 g_assert(!object || (SP_OBJECT_REPR(object) == repr));
513 sp_style_clear(style);
515 if (object && SP_OBJECT_IS_CLONED(object)) {
516 style->cloned = true;
517 }
519 /* 1. Style itself */
520 gchar const *val = repr->attribute("style");
521 if (val != NULL) {
522 sp_style_merge_from_style_string(style, val);
523 }
525 if (object) {
526 sp_style_merge_from_object_stylesheet(style, object);
527 } else {
528 /** \todo No stylesheet information. Find out under what circumstances
529 * this occurs, and handle accordingly. (If we really wanted to, we
530 * could probably get stylesheets by going through repr->doc.)
531 */
532 }
534 /* 2. Presentation attributes */
535 /* CSS2 */
536 SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true);
537 SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true);
538 SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true);
539 /* Font */
540 SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size");
541 SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true);
542 SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true);
543 SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true);
544 SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true);
545 /* Text (css2 chapter 16) */
546 SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent");
547 SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true);
548 if (!style->text_decoration.set) {
549 val = repr->attribute("text-decoration");
550 if (val) {
551 sp_style_read_itextdecoration(&style->text_decoration, val);
552 }
553 }
554 if (!style->line_height.set) {
555 val = repr->attribute("line-height");
556 if (val) {
557 sp_style_read_ilengthornormal(&style->line_height, val);
558 }
559 }
560 if (!style->letter_spacing.set) {
561 val = repr->attribute("letter-spacing");
562 if (val) {
563 sp_style_read_ilengthornormal(&style->letter_spacing, val);
564 }
565 }
566 if (!style->word_spacing.set) {
567 val = repr->attribute("word-spacing");
568 if (val) {
569 sp_style_read_ilengthornormal(&style->word_spacing, val);
570 }
571 }
572 SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true);
573 SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true);
574 SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true);
576 /* SVG */
577 SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode",
578 enum_writing_mode, true);
579 SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor",
580 enum_text_anchor, true);
582 /* opacity */
583 if (!style->opacity.set) {
584 val = repr->attribute("opacity");
585 if (val) {
586 sp_style_read_iscale24(&style->opacity, val);
587 }
588 }
589 /* color */
590 if (!style->color.set) {
591 val = repr->attribute("color");
592 if (val) {
593 sp_style_read_icolor(&style->color, val, style, ( object
594 ? SP_OBJECT_DOCUMENT(object)
595 : NULL ));
596 }
597 }
598 /* fill */
599 if (!style->fill.set) {
600 val = repr->attribute("fill");
601 if (val) {
602 sp_style_read_ipaint(&style->fill, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
603 }
604 }
605 /* fill-opacity */
606 if (!style->fill_opacity.set) {
607 val = repr->attribute("fill-opacity");
608 if (val) {
609 sp_style_read_iscale24(&style->fill_opacity, val);
610 }
611 }
612 /* fill-rule */
613 SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true);
614 /* stroke */
615 if (!style->stroke.set) {
616 val = repr->attribute("stroke");
617 if (val) {
618 sp_style_read_ipaint(&style->stroke, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
619 }
620 }
621 SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width");
622 SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true);
623 SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true);
624 SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit");
626 /* markers */
627 if (!style->marker[SP_MARKER_LOC].set) {
628 val = repr->attribute("marker");
629 if (val) {
630 sp_style_read_istring(&style->marker[SP_MARKER_LOC], val);
631 }
632 }
633 if (!style->marker[SP_MARKER_LOC_START].set) {
634 val = repr->attribute("marker-start");
635 if (val) {
636 sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val);
637 }
638 }
639 if (!style->marker[SP_MARKER_LOC_MID].set) {
640 val = repr->attribute("marker-mid");
641 if (val) {
642 sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val);
643 }
644 }
645 if (!style->marker[SP_MARKER_LOC_END].set) {
646 val = repr->attribute("marker-end");
647 if (val) {
648 sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val);
649 }
650 }
652 /* stroke-opacity */
653 if (!style->stroke_opacity.set) {
654 val = repr->attribute("stroke-opacity");
655 if (val) {
656 sp_style_read_iscale24(&style->stroke_opacity, val);
657 }
658 }
659 if (!style->stroke_dasharray_set) {
660 val = repr->attribute("stroke-dasharray");
661 if (val) {
662 sp_style_read_dash(style, val);
663 }
664 }
665 if (!style->stroke_dashoffset_set) {
666 /* fixme */
667 val = repr->attribute("stroke-dashoffset");
668 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
669 style->stroke_dashoffset_set = TRUE;
670 } else {
671 style->stroke_dashoffset_set = FALSE;
672 }
673 }
675 /* font-family */
676 if (!style->text_private || !style->text->font_family.set) {
677 val = repr->attribute("font-family");
678 if (val) {
679 if (!style->text_private) sp_style_privatize_text(style);
680 sp_style_read_istring(&style->text->font_family, val);
681 css2_unescape_unquote(&style->text->font_family);
682 }
683 }
685 /* filter effects */
686 if (!style->filter.set) {
687 val = repr->attribute("filter");
688 if (val) {
689 sp_style_read_ifilter(val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
690 }
691 }
692 SPS_READ_PENUM_IF_UNSET(&style->enable_background, repr,
693 "enable-background", enum_enable_background, true);
695 /* 3. Merge from parent */
696 if (object) {
697 if (object->parent) {
698 sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent));
699 }
700 } else {
701 if (sp_repr_parent(repr)) {
702 /// \todo fixme: This is not the prettiest thing (Lauris)
703 SPStyle *parent = sp_style_new();
704 sp_style_read(parent, NULL, sp_repr_parent(repr));
705 sp_style_merge_from_parent(style, parent);
706 sp_style_unref(parent);
707 }
708 }
709 }
712 /**
713 * Read style properties from object's repr.
714 *
715 * 1. Reset existing object style
716 * 2. Load current effective object style
717 * 3. Load i attributes from immediate parent (which has to be up-to-date)
718 */
719 void
720 sp_style_read_from_object(SPStyle *style, SPObject *object)
721 {
722 g_return_if_fail(style != NULL);
723 g_return_if_fail(object != NULL);
724 g_return_if_fail(SP_IS_OBJECT(object));
726 Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
727 g_return_if_fail(repr != NULL);
729 sp_style_read(style, object, repr);
730 }
733 /**
734 * Read style properties from repr only.
735 */
736 void
737 sp_style_read_from_repr(SPStyle *style, Inkscape::XML::Node *repr)
738 {
739 g_return_if_fail(style != NULL);
740 g_return_if_fail(repr != NULL);
742 sp_style_read(style, NULL, repr);
743 }
747 /**
748 *
749 */
750 static void
751 sp_style_privatize_text(SPStyle *style)
752 {
753 SPTextStyle *text = style->text;
754 style->text = sp_text_style_duplicate_unset(style->text);
755 sp_text_style_unref(text);
756 style->text_private = TRUE;
757 }
760 /**
761 * Merge property into style.
762 *
763 * Should be called in order of highest to lowest precedence.
764 * E.g. for a single style string, call from the last declaration to the first,
765 * as CSS says that later declarations override earlier ones.
766 *
767 * \pre val != NULL.
768 */
769 static void
770 sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
771 {
772 g_return_if_fail(val != NULL);
774 switch (id) {
775 /* CSS2 */
776 /* Font */
777 case SP_PROP_FONT_FAMILY:
778 if (!style->text_private) sp_style_privatize_text(style);
779 if (!style->text->font_family.set) {
780 sp_style_read_istring(&style->text->font_family, val);
781 css2_unescape_unquote(&style->text->font_family);
782 }
783 break;
784 case SP_PROP_FONT_SIZE:
785 SPS_READ_IFONTSIZE_IF_UNSET(&style->font_size, val);
786 break;
787 case SP_PROP_FONT_SIZE_ADJUST:
788 if (strcmp(val, "none") != 0) {
789 g_warning("Unimplemented style property id SP_PROP_FONT_SIZE_ADJUST: value: %s", val);
790 }
791 break;
792 case SP_PROP_FONT_STYLE:
793 SPS_READ_IENUM_IF_UNSET(&style->font_style, val, enum_font_style, true);
794 break;
795 case SP_PROP_FONT_VARIANT:
796 SPS_READ_IENUM_IF_UNSET(&style->font_variant, val, enum_font_variant, true);
797 break;
798 case SP_PROP_FONT_WEIGHT:
799 SPS_READ_IENUM_IF_UNSET(&style->font_weight, val, enum_font_weight, true);
800 break;
801 case SP_PROP_FONT_STRETCH:
802 SPS_READ_IENUM_IF_UNSET(&style->font_stretch, val, enum_font_stretch, true);
803 break;
804 case SP_PROP_FONT:
805 if (!style->text_private) sp_style_privatize_text(style);
806 if (!style->text->font.set) {
807 g_free(style->text->font.value);
808 style->text->font.value = g_strdup(val);
809 style->text->font.set = TRUE;
810 style->text->font.inherit = (val && !strcmp(val, "inherit"));
811 }
812 break;
813 /* Text */
814 case SP_PROP_TEXT_INDENT:
815 SPS_READ_ILENGTH_IF_UNSET(&style->text_indent, val);
816 break;
817 case SP_PROP_TEXT_ALIGN:
818 SPS_READ_IENUM_IF_UNSET(&style->text_align, val, enum_text_align, true);
819 break;
820 case SP_PROP_TEXT_DECORATION:
821 if (!style->text_decoration.set) {
822 sp_style_read_itextdecoration(&style->text_decoration, val);
823 }
824 break;
825 case SP_PROP_LINE_HEIGHT:
826 if (!style->line_height.set) {
827 sp_style_read_ilengthornormal(&style->line_height, val);
828 }
829 break;
830 case SP_PROP_LETTER_SPACING:
831 if (!style->letter_spacing.set) {
832 sp_style_read_ilengthornormal(&style->letter_spacing, val);
833 }
834 break;
835 case SP_PROP_WORD_SPACING:
836 if (!style->word_spacing.set) {
837 sp_style_read_ilengthornormal(&style->word_spacing, val);
838 }
839 break;
840 case SP_PROP_TEXT_TRANSFORM:
841 SPS_READ_IENUM_IF_UNSET(&style->text_transform, val, enum_text_transform, true);
842 break;
843 /* Text (css3) */
844 case SP_PROP_DIRECTION:
845 SPS_READ_IENUM_IF_UNSET(&style->direction, val, enum_direction, true);
846 break;
847 case SP_PROP_BLOCK_PROGRESSION:
848 SPS_READ_IENUM_IF_UNSET(&style->block_progression, val, enum_block_progression, true);
849 break;
850 case SP_PROP_WRITING_MODE:
851 SPS_READ_IENUM_IF_UNSET(&style->writing_mode, val, enum_writing_mode, true);
852 break;
853 case SP_PROP_TEXT_ANCHOR:
854 SPS_READ_IENUM_IF_UNSET(&style->text_anchor, val, enum_text_anchor, true);
855 break;
856 /* Text (unimplemented) */
857 case SP_PROP_TEXT_RENDERING: {
858 /* Ignore the hint. */
859 SPIEnum dummy;
860 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_text_rendering, true);
861 break;
862 }
863 case SP_PROP_ALIGNMENT_BASELINE:
864 g_warning("Unimplemented style property SP_PROP_ALIGNMENT_BASELINE: value: %s", val);
865 break;
866 case SP_PROP_BASELINE_SHIFT:
867 g_warning("Unimplemented style property SP_PROP_BASELINE_SHIFT: value: %s", val);
868 break;
869 case SP_PROP_DOMINANT_BASELINE:
870 g_warning("Unimplemented style property SP_PROP_DOMINANT_BASELINE: value: %s", val);
871 break;
872 case SP_PROP_GLYPH_ORIENTATION_HORIZONTAL:
873 g_warning("Unimplemented style property SP_PROP_ORIENTATION_HORIZONTAL: value: %s", val);
874 break;
875 case SP_PROP_GLYPH_ORIENTATION_VERTICAL:
876 g_warning("Unimplemented style property SP_PROP_ORIENTATION_VERTICAL: value: %s", val);
877 break;
878 case SP_PROP_KERNING:
879 g_warning("Unimplemented style property SP_PROP_KERNING: value: %s", val);
880 break;
881 /* Misc */
882 case SP_PROP_CLIP:
883 g_warning("Unimplemented style property SP_PROP_CLIP: value: %s", val);
884 break;
885 case SP_PROP_COLOR:
886 if (!style->color.set) {
887 sp_style_read_icolor(&style->color, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
888 }
889 break;
890 case SP_PROP_CURSOR:
891 g_warning("Unimplemented style property SP_PROP_CURSOR: value: %s", val);
892 break;
893 case SP_PROP_DISPLAY:
894 SPS_READ_IENUM_IF_UNSET(&style->display, val, enum_display, true);
895 break;
896 case SP_PROP_OVERFLOW:
897 /** \todo
898 * FIXME: not supported properly yet, we just read and write it,
899 * but act as if it is always "display".
900 */
901 SPS_READ_IENUM_IF_UNSET(&style->overflow, val, enum_overflow, true);
902 break;
903 case SP_PROP_VISIBILITY:
904 SPS_READ_IENUM_IF_UNSET(&style->visibility, val, enum_visibility, true);
905 break;
906 /* SVG */
907 /* Clip/Mask */
908 case SP_PROP_CLIP_PATH:
909 g_warning("Unimplemented style property SP_PROP_CLIP_PATH: value: %s", val);
910 break;
911 case SP_PROP_CLIP_RULE:
912 g_warning("Unimplemented style property SP_PROP_CLIP_RULE: value: %s", val);
913 break;
914 case SP_PROP_MASK:
915 g_warning("Unimplemented style property SP_PROP_MASK: value: %s", val);
916 break;
917 case SP_PROP_OPACITY:
918 if (!style->opacity.set) {
919 sp_style_read_iscale24(&style->opacity, val);
920 }
921 break;
922 case SP_PROP_ENABLE_BACKGROUND:
923 SPS_READ_IENUM_IF_UNSET(&style->enable_background, val,
924 enum_enable_background, true);
925 break;
926 /* Filter */
927 case SP_PROP_FILTER:
928 if (!style->filter.set && !style->filter.inherit) {
929 sp_style_read_ifilter(val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
930 }
931 break;
932 case SP_PROP_FLOOD_COLOR:
933 g_warning("Unimplemented style property SP_PROP_FLOOD_COLOR: value: %s", val);
934 break;
935 case SP_PROP_FLOOD_OPACITY:
936 g_warning("Unimplemented style property SP_PROP_FLOOD_OPACITY: value: %s", val);
937 break;
938 case SP_PROP_LIGHTING_COLOR:
939 g_warning("Unimplemented style property SP_PROP_LIGHTING_COLOR: value: %s", val);
940 break;
941 /* Gradient */
942 case SP_PROP_STOP_COLOR:
943 g_warning("Unimplemented style property SP_PROP_STOP_COLOR: value: %s", val);
944 break;
945 case SP_PROP_STOP_OPACITY:
946 g_warning("Unimplemented style property SP_PROP_STOP_OPACITY: value: %s", val);
947 break;
948 /* Interactivity */
949 case SP_PROP_POINTER_EVENTS:
950 g_warning("Unimplemented style property SP_PROP_POINTER_EVENTS: value: %s", val);
951 break;
952 /* Paint */
953 case SP_PROP_COLOR_INTERPOLATION:
954 g_warning("Unimplemented style property SP_PROP_COLOR_INTERPOLATION: value: %s", val);
955 break;
956 case SP_PROP_COLOR_INTERPOLATION_FILTERS:
957 g_warning("Unimplemented style property SP_PROP_INTERPOLATION_FILTERS: value: %s", val);
958 break;
959 case SP_PROP_COLOR_PROFILE:
960 g_warning("Unimplemented style property SP_PROP_COLOR_PROFILE: value: %s", val);
961 break;
962 case SP_PROP_COLOR_RENDERING: {
963 /* Ignore the hint. */
964 SPIEnum dummy;
965 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_color_rendering, true);
966 break;
967 }
968 case SP_PROP_FILL:
969 if (!style->fill.set) {
970 sp_style_read_ipaint(&style->fill, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
971 }
972 break;
973 case SP_PROP_FILL_OPACITY:
974 if (!style->fill_opacity.set) {
975 sp_style_read_iscale24(&style->fill_opacity, val);
976 }
977 break;
978 case SP_PROP_FILL_RULE:
979 if (!style->fill_rule.set) {
980 sp_style_read_ienum(&style->fill_rule, val, enum_fill_rule, true);
981 }
982 break;
983 case SP_PROP_IMAGE_RENDERING: {
984 /* Ignore the hint. */
985 SPIEnum dummy;
986 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_image_rendering, true);
987 break;
988 }
989 case SP_PROP_MARKER:
990 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
991 /* style->marker[SP_MARKER_LOC] = g_quark_from_string(val); */
992 if (!style->marker[SP_MARKER_LOC].set) {
993 g_free(style->marker[SP_MARKER_LOC].value);
994 style->marker[SP_MARKER_LOC].value = g_strdup(val);
995 style->marker[SP_MARKER_LOC].set = TRUE;
996 style->marker[SP_MARKER_LOC].inherit = (val && !strcmp(val, "inherit"));
997 }
998 break;
1000 case SP_PROP_MARKER_START:
1001 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1002 if (!style->marker[SP_MARKER_LOC_START].set) {
1003 g_free(style->marker[SP_MARKER_LOC_START].value);
1004 style->marker[SP_MARKER_LOC_START].value = g_strdup(val);
1005 style->marker[SP_MARKER_LOC_START].set = TRUE;
1006 style->marker[SP_MARKER_LOC_START].inherit = (val && !strcmp(val, "inherit"));
1007 }
1008 break;
1009 case SP_PROP_MARKER_MID:
1010 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1011 if (!style->marker[SP_MARKER_LOC_MID].set) {
1012 g_free(style->marker[SP_MARKER_LOC_MID].value);
1013 style->marker[SP_MARKER_LOC_MID].value = g_strdup(val);
1014 style->marker[SP_MARKER_LOC_MID].set = TRUE;
1015 style->marker[SP_MARKER_LOC_MID].inherit = (val && !strcmp(val, "inherit"));
1016 }
1017 break;
1018 case SP_PROP_MARKER_END:
1019 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1020 if (!style->marker[SP_MARKER_LOC_END].set) {
1021 g_free(style->marker[SP_MARKER_LOC_END].value);
1022 style->marker[SP_MARKER_LOC_END].value = g_strdup(val);
1023 style->marker[SP_MARKER_LOC_END].set = TRUE;
1024 style->marker[SP_MARKER_LOC_END].inherit = (val && !strcmp(val, "inherit"));
1025 }
1026 break;
1028 case SP_PROP_SHAPE_RENDERING: {
1029 /* Ignore the hint. */
1030 SPIEnum dummy;
1031 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_shape_rendering, true);
1032 break;
1033 }
1035 case SP_PROP_STROKE:
1036 if (!style->stroke.set) {
1037 sp_style_read_ipaint(&style->stroke, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
1038 }
1039 break;
1040 case SP_PROP_STROKE_WIDTH:
1041 SPS_READ_ILENGTH_IF_UNSET(&style->stroke_width, val);
1042 break;
1043 case SP_PROP_STROKE_DASHARRAY:
1044 if (!style->stroke_dasharray_set) {
1045 sp_style_read_dash(style, val);
1046 }
1047 break;
1048 case SP_PROP_STROKE_DASHOFFSET:
1049 if (!style->stroke_dashoffset_set) {
1050 /* fixme */
1051 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
1052 style->stroke_dashoffset_set = TRUE;
1053 } else {
1054 style->stroke_dashoffset_set = FALSE;
1055 }
1056 }
1057 break;
1058 case SP_PROP_STROKE_LINECAP:
1059 if (!style->stroke_linecap.set) {
1060 sp_style_read_ienum(&style->stroke_linecap, val, enum_stroke_linecap, true);
1061 }
1062 break;
1063 case SP_PROP_STROKE_LINEJOIN:
1064 if (!style->stroke_linejoin.set) {
1065 sp_style_read_ienum(&style->stroke_linejoin, val, enum_stroke_linejoin, true);
1066 }
1067 break;
1068 case SP_PROP_STROKE_MITERLIMIT:
1069 if (!style->stroke_miterlimit.set) {
1070 sp_style_read_ifloat(&style->stroke_miterlimit, val);
1071 }
1072 break;
1073 case SP_PROP_STROKE_OPACITY:
1074 if (!style->stroke_opacity.set) {
1075 sp_style_read_iscale24(&style->stroke_opacity, val);
1076 }
1077 break;
1079 default:
1080 g_warning("Invalid style property id: %d value: %s", id, val);
1081 break;
1082 }
1083 }
1085 static void
1086 sp_style_merge_style_from_decl(SPStyle *const style, CRDeclaration const *const decl)
1087 {
1088 /** \todo Ensure that property is lcased, as per
1089 * http://www.w3.org/TR/REC-CSS2/syndata.html#q4.
1090 * Should probably be done in libcroco.
1091 */
1092 unsigned const prop_idx = sp_attribute_lookup(decl->property->stryng->str);
1093 if (prop_idx != SP_ATTR_INVALID) {
1094 /** \todo
1095 * effic: Test whether the property is already set before trying to
1096 * convert to string. Alternatively, set from CRTerm directly rather
1097 * than converting to string.
1098 */
1099 guchar *const str_value_unsigned = cr_term_to_string(decl->value);
1100 gchar *const str_value = reinterpret_cast<gchar *>(str_value_unsigned);
1101 sp_style_merge_property(style, prop_idx, str_value);
1102 g_free(str_value);
1103 }
1104 }
1106 static void
1107 sp_style_merge_from_props(SPStyle *const style, CRPropList *const props)
1108 {
1109 #if 0 /* forwards */
1110 for (CRPropList const *cur = props; cur; cur = cr_prop_list_get_next(cur)) {
1111 CRDeclaration *decl = NULL;
1112 cr_prop_list_get_decl(cur, &decl);
1113 sp_style_merge_style_from_decl(style, decl);
1114 }
1115 #else /* in reverse order, as we need later declarations to take precedence over earlier ones. */
1116 if (props) {
1117 sp_style_merge_from_props(style, cr_prop_list_get_next(props));
1118 CRDeclaration *decl = NULL;
1119 cr_prop_list_get_decl(props, &decl);
1120 sp_style_merge_style_from_decl(style, decl);
1121 }
1122 #endif
1123 }
1125 /**
1126 * \pre decl_list != NULL
1127 */
1128 static void
1129 sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list)
1130 {
1131 if (decl_list->next) {
1132 sp_style_merge_from_decl_list(style, decl_list->next);
1133 }
1134 sp_style_merge_style_from_decl(style, decl_list);
1135 }
1137 static CRSelEng *
1138 sp_repr_sel_eng()
1139 {
1140 CRSelEng *const ret = cr_sel_eng_new();
1141 cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface);
1143 /** \todo
1144 * Check whether we need to register any pseudo-class handlers.
1145 * libcroco has its own default handlers for first-child and lang.
1146 *
1147 * We probably want handlers for link and arguably visited (though
1148 * inkscape can't visit links at the time of writing). hover etc.
1149 * more useful in inkview than the editor inkscape.
1150 *
1151 * http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that
1152 * the following should be honoured, at least by inkview:
1153 * :hover, :active, :focus, :visited, :link.
1154 */
1156 g_assert(ret);
1157 return ret;
1158 }
1160 static void
1161 sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object)
1162 {
1163 static CRSelEng *sel_eng = NULL;
1164 if (!sel_eng) {
1165 sel_eng = sp_repr_sel_eng();
1166 }
1168 CRPropList *props = NULL;
1169 CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng,
1170 object->document->style_cascade,
1171 object->repr,
1172 &props);
1173 g_return_if_fail(status == CR_OK);
1174 /// \todo Check what errors can occur, and handle them properly.
1175 if (props) {
1176 sp_style_merge_from_props(style, props);
1177 cr_prop_list_destroy(props);
1178 }
1179 }
1181 /**
1182 * Parses a style="..." string and merges it with an existing SPStyle.
1183 */
1184 void
1185 sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p)
1186 {
1187 /*
1188 * Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute:
1189 * ``When CSS styling is used, CSS inline style is specified by including
1190 * semicolon-separated property declarations of the form "name : value"
1191 * within the style attribute''.
1192 *
1193 * That's fairly ambiguous. Is a `value' allowed to contain semicolons?
1194 * Why does it say "including", what else is allowed in the style
1195 * attribute value?
1196 */
1198 CRDeclaration *const decl_list
1199 = cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8);
1200 if (decl_list) {
1201 sp_style_merge_from_decl_list(style, decl_list);
1202 cr_declaration_destroy(decl_list);
1203 }
1204 }
1206 /** Indexed by SP_CSS_FONT_SIZE_blah. */
1207 static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0};
1209 static void
1210 sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent)
1211 {
1212 /* 'font-size' */
1213 if (!child.set || child.inherit) {
1214 /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
1215 child.computed = parent.computed;
1216 } else if (child.type == SP_FONT_SIZE_LITERAL) {
1217 /** \todo
1218 * fixme: SVG and CSS do not specify clearly, whether we should use
1219 * user or screen coordinates (Lauris)
1220 */
1221 if (child.value < SP_CSS_FONT_SIZE_SMALLER) {
1222 child.computed = font_size_table[child.value];
1223 } else if (child.value == SP_CSS_FONT_SIZE_SMALLER) {
1224 child.computed = parent.computed / 1.2;
1225 } else if (child.value == SP_CSS_FONT_SIZE_LARGER) {
1226 child.computed = parent.computed * 1.2;
1227 } else {
1228 /* Illegal value */
1229 }
1230 } else if (child.type == SP_FONT_SIZE_PERCENTAGE) {
1231 /* Unlike most other lengths, percentage for font size is relative to parent computed value
1232 * rather than viewport. */
1233 child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value);
1234 }
1235 }
1237 /**
1238 * Sets computed values in \a style, which may involve inheriting from (or in some other way
1239 * calculating from) corresponding computed values of \a parent.
1240 *
1241 * References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default.
1242 * http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to
1243 * inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise
1244 * about what the computed value is (not obvious for lengths).
1245 *
1246 * \pre \a parent's computed values are already up-to-date.
1247 */
1248 void
1249 sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent)
1250 {
1251 g_return_if_fail(style != NULL);
1253 /** \todo
1254 * fixme: Check for existing callers that might pass null parent.
1255 * This should probably be g_return_if_fail, or else we should make a
1256 * best attempt to set computed values correctly without having a parent
1257 * (i.e., by assuming parent has initial values).
1258 */
1259 if (!parent)
1260 return;
1262 /* CSS2 */
1263 /* Font */
1264 sp_style_merge_font_size_from_parent(style->font_size, parent->font_size);
1266 /* 'font-style' */
1267 if (!style->font_style.set || style->font_style.inherit) {
1268 style->font_style.computed = parent->font_style.computed;
1269 }
1271 /* 'font-variant' */
1272 if (!style->font_variant.set || style->font_variant.inherit) {
1273 style->font_variant.computed = parent->font_variant.computed;
1274 }
1276 /* 'font-weight' */
1277 if (!style->font_weight.set || style->font_weight.inherit) {
1278 style->font_weight.computed = parent->font_weight.computed;
1279 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) {
1280 /** \todo
1281 * fixme: This is unconditional, i.e., happens even if parent not
1282 * present.
1283 */
1284 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
1285 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) {
1286 style->font_weight.computed = SP_CSS_FONT_WEIGHT_700;
1287 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) {
1288 unsigned const parent_val = parent->font_weight.computed;
1289 g_assert(SP_CSS_FONT_WEIGHT_100 == 0);
1290 // strictly, 'bolder' and 'lighter' should go to the next weight
1291 // expressible in the current font family, but that's difficult to
1292 // find out, so jumping by 3 seems an appropriate approximation
1293 style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3
1294 ? (unsigned)SP_CSS_FONT_WEIGHT_100
1295 : parent_val - 3);
1296 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1297 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) {
1298 unsigned const parent_val = parent->font_weight.computed;
1299 g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900);
1300 style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3
1301 ? (unsigned)SP_CSS_FONT_WEIGHT_900
1302 : parent_val + 3);
1303 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1304 }
1306 /* 'font-stretch' */
1307 if (!style->font_stretch.set || style->font_stretch.inherit) {
1308 style->font_stretch.computed = parent->font_stretch.computed;
1309 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) {
1310 unsigned const parent_val = parent->font_stretch.computed;
1311 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED
1312 ? parent_val
1313 : parent_val - 1);
1314 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1315 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) {
1316 unsigned const parent_val = parent->font_stretch.computed;
1317 g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1318 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED
1319 ? parent_val
1320 : parent_val + 1);
1321 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1322 }
1324 /* text (css2) */
1325 if (!style->text_indent.set || style->text_indent.inherit) {
1326 style->text_indent.computed = parent->text_indent.computed;
1327 }
1329 if (!style->text_align.set || style->text_align.inherit) {
1330 style->text_align.computed = parent->text_align.computed;
1331 }
1333 if (!style->text_decoration.set || style->text_decoration.inherit) {
1334 style->text_decoration.underline = parent->text_decoration.underline;
1335 style->text_decoration.overline = parent->text_decoration.overline;
1336 style->text_decoration.line_through = parent->text_decoration.line_through;
1337 style->text_decoration.blink = parent->text_decoration.blink;
1338 }
1340 if (!style->line_height.set || style->line_height.inherit) {
1341 style->line_height.computed = parent->line_height.computed;
1342 style->line_height.normal = parent->line_height.normal;
1343 }
1345 if (!style->letter_spacing.set || style->letter_spacing.inherit) {
1346 style->letter_spacing.computed = parent->letter_spacing.computed;
1347 style->letter_spacing.normal = parent->letter_spacing.normal;
1348 }
1350 if (!style->word_spacing.set || style->word_spacing.inherit) {
1351 style->word_spacing.computed = parent->word_spacing.computed;
1352 style->word_spacing.normal = parent->word_spacing.normal;
1353 }
1355 if (!style->text_transform.set || style->text_transform.inherit) {
1356 style->text_transform.computed = parent->text_transform.computed;
1357 }
1359 if (!style->direction.set || style->direction.inherit) {
1360 style->direction.computed = parent->direction.computed;
1361 }
1363 if (!style->block_progression.set || style->block_progression.inherit) {
1364 style->block_progression.computed = parent->block_progression.computed;
1365 }
1367 if (!style->writing_mode.set || style->writing_mode.inherit) {
1368 style->writing_mode.computed = parent->writing_mode.computed;
1369 }
1371 if (!style->text_anchor.set || style->text_anchor.inherit) {
1372 style->text_anchor.computed = parent->text_anchor.computed;
1373 }
1375 if (style->opacity.inherit) {
1376 style->opacity.value = parent->opacity.value;
1377 }
1379 /* Color */
1380 if (!style->color.set || style->color.inherit) {
1381 sp_style_merge_ipaint(style, &style->color, &parent->color);
1382 }
1384 /* Fill */
1385 if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) {
1386 sp_style_merge_ipaint(style, &style->fill, &parent->fill);
1387 }
1389 if (!style->fill_opacity.set || style->fill_opacity.inherit) {
1390 style->fill_opacity.value = parent->fill_opacity.value;
1391 }
1393 if (!style->fill_rule.set || style->fill_rule.inherit) {
1394 style->fill_rule.computed = parent->fill_rule.computed;
1395 }
1397 /* Stroke */
1398 if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) {
1399 sp_style_merge_ipaint(style, &style->stroke, &parent->stroke);
1400 }
1402 if (!style->stroke_width.set || style->stroke_width.inherit) {
1403 style->stroke_width.computed = parent->stroke_width.computed;
1404 } else {
1405 /* Update computed value for any change in font inherited from parent. */
1406 double const em = style->font_size.computed;
1407 if (style->stroke_width.unit == SP_CSS_UNIT_EM) {
1408 style->stroke_width.computed = style->stroke_width.value * em;
1409 } else if (style->stroke_width.unit == SP_CSS_UNIT_EX) {
1410 double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango.
1411 style->stroke_width.computed = style->stroke_width.value * ex;
1412 }
1413 }
1415 if (!style->stroke_linecap.set || style->stroke_linecap.inherit) {
1416 style->stroke_linecap.computed = parent->stroke_linecap.computed;
1417 }
1419 if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) {
1420 style->stroke_linejoin.computed = parent->stroke_linejoin.computed;
1421 }
1423 if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) {
1424 style->stroke_miterlimit.value = parent->stroke_miterlimit.value;
1425 }
1427 if (!style->stroke_dasharray_set && parent->stroke_dasharray_set) {
1428 /** \todo
1429 * This code looks wrong. Why does the logic differ from the
1430 * above properties? Similarly dashoffset below.
1431 */
1432 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1433 if (style->stroke_dash.n_dash > 0) {
1434 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1435 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1436 }
1437 }
1439 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1440 style->stroke_dash.offset = parent->stroke_dash.offset;
1441 }
1443 if (!style->stroke_opacity.set || style->stroke_opacity.inherit) {
1444 style->stroke_opacity.value = parent->stroke_opacity.value;
1445 }
1447 if (style->text && parent->text) {
1448 if (!style->text->font_family.set || style->text->font_family.inherit) {
1449 g_free(style->text->font_family.value);
1450 style->text->font_family.value = g_strdup(parent->text->font_family.value);
1451 }
1452 }
1454 /* Markers - Free the old value and make copy of the new */
1455 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1456 if (!style->marker[i].set || style->marker[i].inherit) {
1457 g_free(style->marker[i].value);
1458 style->marker[i].value = g_strdup(parent->marker[i].value);
1459 }
1460 }
1462 /* Filter effects */
1463 if (style->filter.inherit) {
1464 sp_style_merge_ifilter(style, &parent->filter);
1465 }
1467 if(style->enable_background.inherit) {
1468 style->enable_background.value = parent->enable_background.value;
1469 }
1470 }
1472 template <typename T>
1473 static void
1474 sp_style_merge_prop_from_dying_parent(T &child, T const &parent)
1475 {
1476 if ( ( !(child.set) || child.inherit )
1477 && parent.set && !(parent.inherit) )
1478 {
1479 child = parent;
1480 }
1481 }
1483 /**
1484 * Copy SPIString from parent to child.
1485 */
1486 static void
1487 sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent)
1488 {
1489 if ( ( !(child.set) || child.inherit )
1490 && parent.set && !(parent.inherit) )
1491 {
1492 g_free(child.value);
1493 child.value = g_strdup(parent.value);
1494 child.set = parent.set;
1495 child.inherit = parent.inherit;
1496 }
1497 }
1499 static void
1500 sp_style_merge_paint_prop_from_dying_parent(SPStyle *style,
1501 SPIPaint &child, SPIPaint const &parent)
1502 {
1503 /** \todo
1504 * I haven't given this much attention. See comments below about
1505 * currentColor, colorProfile, and relative URIs.
1506 */
1507 if (!child.set || child.inherit || child.currentcolor) {
1508 sp_style_merge_ipaint(style, &child, &parent);
1509 child.set = parent.set;
1510 child.inherit = parent.inherit;
1511 }
1512 }
1514 static void
1515 sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent,
1516 unsigned const max_computed_val,
1517 unsigned const smaller_val)
1518 {
1519 /* We assume that min computed val is 0, contiguous up to max_computed_val,
1520 then zero or more other absolute values, then smaller_val then larger_val. */
1521 unsigned const min_computed_val = 0;
1522 unsigned const larger_val = smaller_val + 1;
1523 g_return_if_fail(min_computed_val < max_computed_val);
1524 g_return_if_fail(max_computed_val < smaller_val);
1526 if (parent.set && !parent.inherit) {
1527 if (!child.set || child.inherit) {
1528 child.value = parent.value;
1529 child.set = parent.set; // i.e. true
1530 child.inherit = parent.inherit; // i.e. false
1531 } else if (child.value < smaller_val) {
1532 /* Child has absolute value: leave as is. */
1533 } else if ( ( child.value == smaller_val
1534 && parent.value == larger_val )
1535 || ( parent.value == smaller_val
1536 && child.value == larger_val ) )
1537 {
1538 child.set = false;
1539 /*
1540 * Note that this can result in a change in computed value in the
1541 * rare case that the parent's setting was a no-op (i.e. if the
1542 * parent's parent's computed value was already ultra-condensed or
1543 * ultra-expanded). However, I'd guess that the change is for the
1544 * better: I'd guess that if the properties were specified
1545 * relatively, then the intent is to counteract parent's effect.
1546 * I.e. I believe this is the best code even in that case.
1547 */
1548 } else if (child.value == parent.value) {
1549 /* Leave as is. */
1550 /** \todo
1551 * It's unclear what to do if style and parent specify the same
1552 * relative directive (narrower or wider). We can either convert
1553 * to absolute specification or coalesce to a single relative
1554 * request (of half the strength of the original pair).
1555 *
1556 * Converting to a single level of relative specification is a
1557 * better choice if the newly-unlinked clone is itself cloned to
1558 * other contexts (inheriting different font stretchiness): it
1559 * would preserve the effect that it will be narrower than
1560 * the inherited context in each case. The disadvantage is that
1561 * it will ~certainly affect the computed value of the
1562 * newly-unlinked clone.
1563 */
1564 } else {
1565 unsigned const parent_val = parent.computed;
1566 child.value = ( child.value == smaller_val
1567 ? ( parent_val == min_computed_val
1568 ? parent_val
1569 : parent_val - 1 )
1570 : ( parent_val == max_computed_val
1571 ? parent_val
1572 : parent_val + 1 ) );
1573 g_assert(child.value <= max_computed_val);
1574 child.inherit = false;
1575 g_assert(child.set);
1576 }
1577 }
1578 }
1580 template <typename LengthT>
1581 static void
1582 sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent,
1583 double const parent_child_em_ratio)
1584 {
1585 if ( ( !(child.set) || child.inherit )
1586 && parent.set && !(parent.inherit) )
1587 {
1588 child = parent;
1589 switch (parent.unit) {
1590 case SP_CSS_UNIT_EM:
1591 case SP_CSS_UNIT_EX:
1592 child.value *= parent_child_em_ratio;
1593 /** \todo
1594 * fixme: Have separate ex ratio parameter.
1595 * Get x height from libnrtype or pango.
1596 */
1597 if (!isFinite(child.value)) {
1598 child.value = child.computed;
1599 child.unit = SP_CSS_UNIT_NONE;
1600 }
1601 break;
1603 default:
1604 break;
1605 }
1606 }
1607 }
1609 static double
1610 get_relative_font_size_frac(SPIFontSize const &font_size)
1611 {
1612 switch (font_size.type) {
1613 case SP_FONT_SIZE_LITERAL: {
1614 switch (font_size.value) {
1615 case SP_CSS_FONT_SIZE_SMALLER:
1616 return 5.0 / 6.0;
1618 case SP_CSS_FONT_SIZE_LARGER:
1619 return 6.0 / 5.0;
1621 default:
1622 g_assert_not_reached();
1623 }
1624 }
1626 case SP_FONT_SIZE_PERCENTAGE:
1627 return SP_F8_16_TO_FLOAT(font_size.value);
1629 case SP_FONT_SIZE_LENGTH:
1630 g_assert_not_reached();
1631 }
1632 g_assert_not_reached();
1633 }
1635 /**
1636 * Combine \a style and \a parent style specifications into a single style specification that
1637 * preserves (as much as possible) the effect of the existing \a style being a child of \a parent.
1638 *
1639 * Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being
1640 * unlinked), in which case we copy/adapt property values that are explicitly set in \a parent,
1641 * trying to retain the same visual appearance once the parent is removed. Interesting cases are
1642 * when there is unusual interaction with the parent's value (opacity, display) or when the value
1643 * can be specified as relative to the parent computed value (font-size, font-weight etc.).
1644 *
1645 * Doesn't update computed values of \a style. For correctness, you should subsequently call
1646 * sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a
1647 * style was previously up-to-date wrt \a parent.
1648 *
1649 * \pre \a parent's computed values are already up-to-date.
1650 * (\a style's computed values needn't be up-to-date.)
1651 */
1652 void
1653 sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent)
1654 {
1655 /** \note
1656 * The general rule for each property is as follows:
1657 *
1658 * If style is set to an absolute value, then leave it as is.
1659 *
1660 * Otherwise (i.e. if style has a relative value):
1661 *
1662 * If parent is set to an absolute value, then set style to the computed value.
1663 *
1664 * Otherwise, calculate the combined relative value (e.g. multiplying the two percentages).
1665 */
1667 /* We do font-size first, to ensure that em size is up-to-date. */
1668 /** \todo
1669 * fixme: We'll need to have more font-related things up the top once
1670 * we're getting x-height from pango or libnrtype.
1671 */
1673 /* Some things that allow relative specifications. */
1674 {
1675 /* font-size. Note that we update the computed font-size of style,
1676 to assist in em calculations later in this function. */
1677 if (parent->font_size.set && !parent->font_size.inherit) {
1678 if (!style->font_size.set || style->font_size.inherit) {
1679 /* font_size inherits the computed value, so we can use the parent value
1680 * verbatim. */
1681 style->font_size = parent->font_size;
1682 } else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) {
1683 /* Child already has absolute size (stored in computed value), so do nothing. */
1684 } else if ( style->font_size.type == SP_FONT_SIZE_LITERAL
1685 && style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) {
1686 /* Child already has absolute size, but we ensure that the computed value
1687 is up-to-date. */
1688 unsigned const ix = style->font_size.value;
1689 g_assert(ix < G_N_ELEMENTS(font_size_table));
1690 style->font_size.computed = font_size_table[ix];
1691 } else {
1692 /* Child has relative size. */
1693 double const child_frac(get_relative_font_size_frac(style->font_size));
1694 style->font_size.set = true;
1695 style->font_size.inherit = false;
1696 style->font_size.computed = parent->font_size.computed * child_frac;
1698 if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL
1699 && parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER )
1700 || parent->font_size.type == SP_FONT_SIZE_LENGTH )
1701 {
1702 /* Absolute value. */
1703 style->font_size.type = SP_FONT_SIZE_LENGTH;
1704 /* .value is unused for SP_FONT_SIZE_LENGTH. */
1705 } else {
1706 /* Relative value. */
1707 double const parent_frac(get_relative_font_size_frac(parent->font_size));
1708 style->font_size.type = SP_FONT_SIZE_PERCENTAGE;
1709 style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac);
1710 }
1711 }
1712 }
1714 /* 'font-stretch' */
1715 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch,
1716 parent->font_stretch,
1717 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
1718 SP_CSS_FONT_STRETCH_NARROWER);
1720 /* font-weight */
1721 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight,
1722 parent->font_weight,
1723 SP_CSS_FONT_WEIGHT_900,
1724 SP_CSS_FONT_WEIGHT_LIGHTER);
1725 }
1728 /* Enum values that don't have any relative settings (other than `inherit'). */
1729 {
1730 SPIEnum SPStyle::*const fields[] = {
1731 //nyi: SPStyle::clip_rule,
1732 //nyi: SPStyle::color_interpolation,
1733 //nyi: SPStyle::color_interpolation_filters,
1734 //nyi: SPStyle::color_rendering,
1735 &SPStyle::direction,
1736 &SPStyle::fill_rule,
1737 &SPStyle::font_style,
1738 &SPStyle::font_variant,
1739 //nyi: SPStyle::image_rendering,
1740 //nyi: SPStyle::pointer_events,
1741 //nyi: SPStyle::shape_rendering,
1742 &SPStyle::stroke_linecap,
1743 &SPStyle::stroke_linejoin,
1744 &SPStyle::text_anchor,
1745 //nyi: &SPStyle::text_rendering,
1746 &SPStyle::visibility,
1747 &SPStyle::writing_mode
1748 };
1750 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1751 SPIEnum SPStyle::*const fld = fields[i];
1752 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld);
1753 }
1754 }
1756 /* A few other simple inheritance properties. */
1757 {
1758 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity);
1759 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity);
1760 sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit);
1762 /** \todo
1763 * We currently treat text-decoration as if it were a simple inherited
1764 * property (fixme). This code may need changing once we do the
1765 * special fill/stroke inheritance mentioned by the spec.
1766 */
1767 sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration,
1768 parent->text_decoration);
1770 //nyi: font-size-adjust, // <number> | none | inherit
1771 //nyi: glyph-orientation-horizontal,
1772 //nyi: glyph-orientation-vertical,
1773 }
1775 /* Properties that involve length but are easy in other respects. */
1776 {
1777 /* The difficulty with lengths is that font-relative units need adjusting if the font
1778 * varies between parent & child.
1779 *
1780 * Lengths specified in the existing child can stay as they are: its computed font
1781 * specification should stay unchanged, so em & ex lengths should continue to mean the same
1782 * size.
1783 *
1784 * Lengths specified in the dying parent in em or ex need to be scaled according to the
1785 * ratio of em or ex size between parent & child.
1786 */
1787 double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed;
1789 SPILength SPStyle::*const lfields[] = {
1790 &SPStyle::stroke_width,
1791 &SPStyle::text_indent
1792 };
1793 for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) {
1794 SPILength SPStyle::*fld = lfields[i];
1795 sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld,
1796 parent->*fld,
1797 parent_child_em_ratio);
1798 }
1800 SPILengthOrNormal SPStyle::*const nfields[] = {
1801 &SPStyle::letter_spacing,
1802 &SPStyle::line_height,
1803 &SPStyle::word_spacing
1804 };
1805 for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) {
1806 SPILengthOrNormal SPStyle::*fld = nfields[i];
1807 sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld,
1808 parent->*fld,
1809 parent_child_em_ratio);
1810 }
1812 //nyi: &SPStyle::kerning: length or `auto'
1814 /* fixme: Move stroke-dash and stroke-dash-offset here once they
1815 can accept units. */
1816 }
1818 /* Properties that involve a URI but are easy in other respects. */
1819 {
1820 /** \todo
1821 * Could cause problems if original object was in another document
1822 * and it used a relative URL. (At the time of writing, we don't
1823 * allow hrefs to other documents, so this isn't a problem yet.)
1824 * Paint properties also allow URIs.
1825 */
1826 //nyi: cursor, // may involve change in effect, but we can't do much better
1827 //nyi: color-profile,
1829 // Markers (marker-start, marker-mid, marker-end).
1830 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1831 sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]);
1832 }
1833 }
1835 /* CSS2 */
1836 /* Font */
1838 if (style->text && parent->text) {
1839 sp_style_merge_string_prop_from_dying_parent(style->text->font_family,
1840 parent->text->font_family);
1841 }
1843 /* Properties that don't inherit by default. Most of these need special handling. */
1844 {
1845 /*
1846 * opacity's effect is cumulative; we set the new value to the combined effect. The
1847 * default value for opacity is 1.0, not inherit. (Note that stroke-opacity and
1848 * fill-opacity are quite different from opacity, and don't need any special handling.)
1849 *
1850 * Cases:
1851 * - parent & child were each previously unset, in which case the effective
1852 * opacity value is 1.0, and style should remain unset.
1853 * - parent was previously unset (so computed opacity value of 1.0)
1854 * and child was set to inherit. The merged child should
1855 * get a value of 1.0, and shouldn't inherit (lest the new parent
1856 * has a different opacity value). Given that opacity's default
1857 * value is 1.0 (rather than inherit), we might as well have the
1858 * merged child's opacity be unset.
1859 * - parent was previously unset (so opacity 1.0), and child was set to a number.
1860 * The merged child should retain its existing settings (though it doesn't matter
1861 * if we make it unset if that number was 1.0).
1862 * - parent was inherit and child was unset. Merged child should be set to inherit.
1863 * - parent was inherit and child was inherit. (We can't in general reproduce this
1864 * effect (short of introducing a new group), but setting opacity to inherit is rare.)
1865 * If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged
1866 * child's value should be set to the product of the two, i.e. the square of the
1867 * inherited value, and should not be marked as inherit. (This decision assumes that it
1868 * is more important to retain the effective opacity than to retain the inheriting
1869 * effect, and assumes that the inheriting effect either isn't important enough to create
1870 * a group or isn't common enough to bother maintaining the code to create a group.) If
1871 * the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes
1872 * closer to maintaining the effect.
1873 * - parent was inherit and child was set to a numerical value. If the child's value
1874 * was 1.0, then the merged child should have the same settings as the parent.
1875 * If the child's value was 0, then the merged child should also be set to 0.
1876 * If the child's value was anything else, then we do the same as for the inherit/inherit
1877 * case above: have the merged child set to the product of the two opacities and not
1878 * marked as inherit, for the same reasons as for that case.
1879 * - parent was set to a value, and child was unset. The merged child should have
1880 * parent's settings.
1881 * - parent was set to a value, and child was inherit. The merged child should
1882 * be set to the product, i.e. the square of the parent's value.
1883 * - parent & child are each set to a value. The merged child should be set to the
1884 * product.
1885 */
1886 if ( !style->opacity.set
1887 || ( !style->opacity.inherit
1888 && style->opacity.value == SP_SCALE24_MAX ) )
1889 {
1890 style->opacity = parent->opacity;
1891 } else {
1892 /* Ensure that style's computed value is up-to-date. */
1893 if (style->opacity.inherit) {
1894 style->opacity.value = parent->opacity.value;
1895 }
1897 /* Multiplication of opacities occurs even if a child's opacity is set to inherit. */
1898 style->opacity.value = SP_SCALE24_MUL(style->opacity.value,
1899 parent->opacity.value);
1901 style->opacity.inherit = (parent->opacity.inherit
1902 && style->opacity.inherit
1903 && (parent->opacity.value == 0 ||
1904 parent->opacity.value == SP_SCALE24_MAX));
1905 style->opacity.set = ( style->opacity.inherit
1906 || style->opacity.value < SP_SCALE24_MAX );
1907 }
1909 /* display is in principle similar to opacity, but implementation is easier. */
1910 if ( parent->display.set && !parent->display.inherit
1911 && parent->display.value == SP_CSS_DISPLAY_NONE ) {
1912 style->display.value = SP_CSS_DISPLAY_NONE;
1913 style->display.set = true;
1914 style->display.inherit = false;
1915 } else if (style->display.inherit) {
1916 style->display.value = parent->display.value;
1917 style->display.set = parent->display.set;
1918 style->display.inherit = parent->display.inherit;
1919 } else {
1920 /* Leave as is. (display doesn't inherit by default.) */
1921 }
1923 /* enable-background - this is rather complicated, because
1924 * it is valid only when applied to container elements.
1925 * Let's check a simple case anyhow. */
1926 if (parent->enable_background.set
1927 && !parent->enable_background.inherit
1928 && style->enable_background.inherit)
1929 {
1930 style->enable_background.set = true;
1931 style->enable_background.inherit = false;
1932 style->enable_background.value = parent->enable_background.value;
1933 }
1935 if (!style->filter.set || style->filter.inherit)
1936 {
1937 // FIXME:
1938 // instead of just copying over, we need to _really merge_ the two filters by combining their
1939 // filter primitives
1940 sp_style_merge_ifilter(style, &parent->filter);
1941 }
1943 /** \todo
1944 * fixme: Check that we correctly handle all properties that don't
1945 * inherit by default (as shown in
1946 * http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties).
1947 */
1948 }
1950 /* SPIPaint properties (including color). */
1951 {
1952 /** \todo
1953 * Think about the issues involved if specified as currentColor or
1954 * if specified relative to colorProfile, and if the currentColor or
1955 * colorProfile differs between parent \& child. See also comments
1956 * elsewhere in this function about URIs.
1957 */
1958 SPIPaint SPStyle::*const fields[] = {
1959 &SPStyle::color,
1960 &SPStyle::fill,
1961 &SPStyle::stroke
1962 };
1963 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1964 SPIPaint SPStyle::*const fld = fields[i];
1965 sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld);
1966 }
1967 }
1969 /* Things from SVG 1.2 or CSS3. */
1970 {
1971 /* Note: If we ever support setting string values for text-align then we'd need strdup
1972 * handling here. */
1973 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align);
1975 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform);
1976 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression);
1977 }
1979 /* Note: this will need length handling once dasharray supports units. */
1980 if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit )
1981 && parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit )
1982 {
1983 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1984 if (style->stroke_dash.n_dash > 0) {
1985 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1986 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1987 }
1988 style->stroke_dasharray_set = parent->stroke_dasharray_set;
1989 style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit;
1990 }
1992 /* Note: this will need length handling once dasharray_offset supports units. */
1993 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1994 style->stroke_dash.offset = parent->stroke_dash.offset;
1995 style->stroke_dashoffset_set = parent->stroke_dashoffset_set;
1996 /* fixme: we don't currently allow stroke-dashoffset to be `inherit'. TODO: Try to
1997 * represent it as a normal SPILength; though will need to do something about existing
1998 * users of stroke_dash.offset and stroke_dashoffset_set. */
1999 }
2000 }
2004 /**
2005 * Disconnects from possible fill and stroke paint servers.
2006 */
2007 static void
2008 sp_style_paint_server_release(SPObject *obj, SPStyle *style)
2009 {
2010 SPPaintServer *server=static_cast<SPPaintServer *>(obj);
2011 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
2012 && (server == style->fill.value.paint.server))
2013 {
2014 sp_style_paint_clear(style, &style->fill);
2015 }
2017 if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
2018 && (server == style->stroke.value.paint.server))
2019 {
2020 sp_style_paint_clear(style, &style->stroke);
2021 }
2022 }
2027 /**
2028 * Emit style modified signal on style's object if server is style's fill
2029 * or stroke paint server.
2030 */
2031 static void
2032 sp_style_paint_server_modified(SPObject *obj, guint flags, SPStyle *style)
2033 {
2034 SPPaintServer *server = static_cast<SPPaintServer *>(obj);
2035 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
2036 && (server == style->fill.value.paint.server))
2037 {
2038 if (style->object) {
2039 /** \todo
2040 * fixme: I do not know, whether it is optimal - we are
2041 * forcing reread of everything (Lauris)
2042 */
2043 /** \todo
2044 * fixme: We have to use object_modified flag, because parent
2045 * flag is only available downstreams.
2046 */
2047 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
2048 }
2049 } else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
2050 && (server == style->stroke.value.paint.server))
2051 {
2052 if (style->object) {
2053 /// \todo fixme:
2054 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
2055 }
2056 } else {
2057 g_assert_not_reached();
2058 }
2059 }
2063 /**
2064 * Disconnects from filter.
2065 */
2066 static void
2067 sp_style_filter_release(SPObject *obj, SPStyle *style)
2068 {
2069 SPFilter *filter=static_cast<SPFilter *>(obj);
2070 if (style->filter.filter == filter)
2071 {
2072 sp_style_filter_clear(style);
2073 }
2074 }
2077 /**
2078 * Emit style modified signal on style's object if the filter changed.
2079 */
2080 static void
2081 sp_style_filter_modified(SPObject *obj, guint flags, SPStyle *style)
2082 {
2083 SPFilter *filter=static_cast<SPFilter *>(obj);
2084 if (style->filter.filter == filter)
2085 {
2086 if (style->object) {
2087 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
2088 }
2089 }
2090 }
2093 /**
2094 *
2095 */
2096 static void
2097 sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
2098 {
2099 sp_style_paint_clear(style, paint);
2101 if ((paint->set && paint->currentcolor) || parent->currentcolor) {
2102 paint->currentcolor = TRUE;
2103 paint->type = SP_PAINT_TYPE_COLOR;
2104 sp_color_copy(&paint->value.color, &style->color.value.color);
2105 return;
2106 }
2108 paint->type = parent->type;
2109 switch (paint->type) {
2110 case SP_PAINT_TYPE_COLOR:
2111 sp_color_copy(&paint->value.color, &parent->value.color);
2112 break;
2113 case SP_PAINT_TYPE_PAINTSERVER:
2114 paint->value.paint.server = parent->value.paint.server;
2115 paint->value.paint.uri = parent->value.paint.uri;
2116 if (paint->value.paint.server) {
2117 if (style->object && !style->cloned) { // href paintserver for style of non-clones only
2118 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
2119 if (paint == &style->fill) {
2120 style->fill_hreffed = true;
2121 } else {
2122 assert(paint == &style->stroke);
2123 style->stroke_hreffed = true;
2124 }
2125 }
2126 if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
2127 SPObject *server = paint->value.paint.server;
2128 sigc::connection release_connection
2129 = server->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_paint_server_release), style));
2130 sigc::connection modified_connection
2131 = server->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_paint_server_modified), style));
2132 if (paint == &style->fill) {
2133 style->fill_release_connection = release_connection;
2134 style->fill_modified_connection = modified_connection;
2135 } else {
2136 assert(paint == &style->stroke);
2137 style->stroke_release_connection = release_connection;
2138 style->stroke_modified_connection = modified_connection;
2139 }
2140 }
2141 }
2142 break;
2143 case SP_PAINT_TYPE_NONE:
2144 break;
2145 default:
2146 g_assert_not_reached();
2147 break;
2148 }
2149 }
2152 /**
2153 * Merge filter style from parent.
2154 * Filter effects do not inherit by default
2155 */
2156 static void
2157 sp_style_merge_ifilter(SPStyle *style, SPIFilter const *parent)
2158 {
2159 sp_style_filter_clear(style);
2160 style->filter.set = parent->set;
2161 style->filter.inherit = parent->inherit;
2162 style->filter.filter = parent->filter;
2163 style->filter.uri = parent->uri;
2164 if (style->filter.filter) {
2165 if (style->object && !style->cloned) { // href filter for style of non-clones only
2166 sp_object_href(SP_OBJECT(style->filter.filter), style);
2167 style->filter_hreffed = true;
2168 }
2169 if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
2170 SPObject *filter = style->filter.filter;
2171 style->filter_release_connection
2172 = filter->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_filter_release), style));
2173 style->filter_modified_connection
2174 = filter->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_filter_modified), style));
2175 }
2176 }
2177 }
2179 /**
2180 * Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or
2181 * SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's
2182 * complete cascaded style to style_clipboard. When you need a CSS string
2183 * for an object in the document tree, you normally call
2184 * sp_style_write_difference instead to take into account the object's parent.
2185 *
2186 * \pre style != NULL.
2187 * \pre flags in {IFSET, ALWAYS}.
2188 * \post ret != NULL.
2189 */
2190 gchar *
2191 sp_style_write_string(SPStyle const *const style, guint const flags)
2192 {
2193 /** \todo
2194 * Merge with write_difference, much duplicate code!
2195 */
2196 g_return_val_if_fail(style != NULL, NULL);
2197 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
2198 (flags == SP_STYLE_FLAG_ALWAYS) ),
2199 NULL);
2201 gchar c[BMAX];
2202 gchar *p = c;
2203 *p = '\0';
2205 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags);
2206 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags);
2207 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags);
2208 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags);
2209 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags);
2211 /* Text */
2212 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags);
2213 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags);
2214 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags);
2215 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags);
2216 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags);
2217 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags);
2218 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags);
2219 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags);
2220 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags);
2221 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags);
2223 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags);
2225 /// \todo fixme: Per type methods need default flag too (lauris)
2226 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags);
2227 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags);
2228 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags);
2229 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags);
2230 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags);
2231 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags);
2232 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags);
2233 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags);
2234 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags);
2236 if (style->marker[SP_MARKER_LOC].set) {
2237 p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value);
2238 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2239 p += g_snprintf(p, c + BMAX - p, "marker:none;");
2240 }
2241 if (style->marker[SP_MARKER_LOC_START].set) {
2242 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value);
2243 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2244 p += g_snprintf(p, c + BMAX - p, "marker-start:none;");
2245 }
2246 if (style->marker[SP_MARKER_LOC_MID].set) {
2247 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value);
2248 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2249 p += g_snprintf(p, c + BMAX - p, "marker-mid:none;");
2250 }
2251 if (style->marker[SP_MARKER_LOC_END].set) {
2252 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value);
2253 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2254 p += g_snprintf(p, c + BMAX - p, "marker-end:none;");
2255 }
2257 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags);
2259 /** \todo fixme: */
2260 if ((flags == SP_STYLE_FLAG_ALWAYS)
2261 || style->stroke_dasharray_set)
2262 {
2263 if (style->stroke_dasharray_inherit) {
2264 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2265 } else if (style->stroke_dash.n_dash && style->stroke_dash.dash) {
2266 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2267 gint i;
2268 for (i = 0; i < style->stroke_dash.n_dash; i++) {
2269 Inkscape::CSSOStringStream os;
2270 if (i) {
2271 os << ", ";
2272 }
2273 os << style->stroke_dash.dash[i];
2274 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2275 }
2276 if (p < c + BMAX) {
2277 *p++ = ';';
2278 }
2279 } else {
2280 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;");
2281 }
2282 }
2284 /** \todo fixme: */
2285 if (style->stroke_dashoffset_set) {
2286 Inkscape::CSSOStringStream os;
2287 os << "stroke-dashoffset:" << style->stroke_dash.offset << ";";
2288 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2289 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2290 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;");
2291 }
2293 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags);
2295 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags);
2296 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags);
2297 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags);
2299 /* filter: */
2300 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &style->filter, NULL, flags);
2302 p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &style->enable_background, NULL, flags);
2304 /* fixme: */
2305 p += sp_text_style_write(p, c + BMAX - p, style->text, flags);
2307 /* Get rid of trailing `;'. */
2308 if (p != c) {
2309 --p;
2310 if (*p == ';') {
2311 *p = '\0';
2312 }
2313 }
2315 return g_strdup(c);
2316 }
2319 #define STYLE_BUF_MAX
2322 /**
2323 * Dumps style to CSS string, see sp_style_write_string()
2324 *
2325 * \pre from != NULL.
2326 * \pre to != NULL.
2327 * \post ret != NULL.
2328 */
2329 gchar *
2330 sp_style_write_difference(SPStyle const *const from, SPStyle const *const to)
2331 {
2332 g_return_val_if_fail(from != NULL, NULL);
2333 g_return_val_if_fail(to != NULL, NULL);
2335 gchar c[BMAX], *p = c;
2336 *p = '\0';
2338 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF);
2339 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF);
2340 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF);
2341 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF);
2342 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF);
2344 /* Text */
2345 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF);
2346 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF);
2347 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF);
2348 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF);
2349 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF);
2350 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF);
2351 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF);
2352 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF);
2353 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF);
2354 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF);
2356 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF);
2358 /// \todo fixme: Per type methods need default flag too
2359 if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) {
2360 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET);
2361 }
2362 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET);
2363 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF);
2364 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF);
2365 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF);
2366 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF);
2367 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF);
2368 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap,
2369 &from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF);
2370 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin,
2371 &from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF);
2372 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit",
2373 &from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF);
2374 /** \todo fixme: */
2375 if (from->stroke_dasharray_set) {
2376 if (from->stroke_dasharray_inherit) {
2377 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2378 } else if (from->stroke_dash.n_dash && from->stroke_dash.dash) {
2379 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2380 for (gint i = 0; i < from->stroke_dash.n_dash; i++) {
2381 Inkscape::CSSOStringStream os;
2382 if (i) {
2383 os << ", ";
2384 }
2385 os << from->stroke_dash.dash[i];
2386 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2387 }
2388 p += g_snprintf(p, c + BMAX - p, ";");
2389 }
2390 }
2391 /* fixme: */
2392 if (from->stroke_dashoffset_set) {
2393 Inkscape::CSSOStringStream os;
2394 os << "stroke-dashoffset:" << from->stroke_dash.offset << ";";
2395 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2396 }
2397 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF);
2399 /* markers */
2400 if (from->marker[SP_MARKER_LOC].value != NULL) {
2401 p += g_snprintf(p, c + BMAX - p, "marker:%s;", from->marker[SP_MARKER_LOC].value);
2402 }
2403 if (from->marker[SP_MARKER_LOC_START].value != NULL) {
2404 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value);
2405 }
2406 if (from->marker[SP_MARKER_LOC_MID].value != NULL) {
2407 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value);
2408 }
2409 if (from->marker[SP_MARKER_LOC_END].value != NULL) {
2410 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value);
2411 }
2413 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET);
2414 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET);
2415 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET);
2417 /* filter: */
2418 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &from->filter, &to->filter, SP_STYLE_FLAG_IFDIFF);
2420 p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &from->enable_background, &to->enable_background, SP_STYLE_FLAG_IFSET);
2422 p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF);
2424 /** \todo
2425 * The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF
2426 * flag is mainly only for attributes that don't handle explicit unset well.
2427 * We may need to revisit the behaviour of this routine.
2428 */
2430 /* Get rid of trailing `;'. */
2431 if (p != c) {
2432 --p;
2433 if (*p == ';') {
2434 *p = '\0';
2435 }
2436 }
2438 return g_strdup(c);
2439 }
2443 /**
2444 * Reset all style properties.
2445 */
2446 static void
2447 sp_style_clear(SPStyle *style)
2448 {
2449 g_return_if_fail(style != NULL);
2451 sp_style_paint_clear(style, &style->fill);
2452 sp_style_paint_clear(style, &style->stroke);
2453 sp_style_filter_clear(style);
2454 if (style->stroke_dash.dash) {
2455 g_free(style->stroke_dash.dash);
2456 }
2458 /** \todo fixme: Do that text manipulation via parents */
2459 SPObject *object = style->object;
2460 gint const refcount = style->refcount;
2461 SPTextStyle *text = style->text;
2462 unsigned const text_private = style->text_private;
2463 memset(style, 0, sizeof(SPStyle));
2464 style->refcount = refcount;
2465 style->object = object;
2466 style->text = text;
2467 style->text_private = text_private;
2468 /* fixme: */
2469 style->text->font.set = FALSE;
2470 style->text->font_family.set = FALSE;
2472 style->font_size.set = FALSE;
2473 style->font_size.type = SP_FONT_SIZE_LITERAL;
2474 style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM;
2475 style->font_size.computed = 12.0;
2476 style->font_style.set = FALSE;
2477 style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL;
2478 style->font_variant.set = FALSE;
2479 style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL;
2480 style->font_weight.set = FALSE;
2481 style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL;
2482 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
2483 style->font_stretch.set = FALSE;
2484 style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL;
2486 /* text */
2487 style->text_indent.set = FALSE;
2488 style->text_indent.unit = SP_CSS_UNIT_NONE;
2489 style->text_indent.computed = 0.0;
2491 style->text_align.set = FALSE;
2492 style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START;
2494 style->text_decoration.set = FALSE;
2495 style->text_decoration.underline = FALSE;
2496 style->text_decoration.overline = FALSE;
2497 style->text_decoration.line_through = FALSE;
2498 style->text_decoration.blink = FALSE;
2500 style->line_height.set = FALSE;
2501 style->line_height.unit = SP_CSS_UNIT_PERCENT;
2502 style->line_height.normal = TRUE;
2503 style->line_height.value = style->line_height.computed = 1.0;
2505 style->letter_spacing.set = FALSE;
2506 style->letter_spacing.unit = SP_CSS_UNIT_NONE;
2507 style->letter_spacing.normal = TRUE;
2508 style->letter_spacing.value = style->letter_spacing.computed = 0.0;
2510 style->word_spacing.set = FALSE;
2511 style->word_spacing.unit = SP_CSS_UNIT_NONE;
2512 style->word_spacing.normal = TRUE;
2513 style->word_spacing.value = style->word_spacing.computed = 0.0;
2515 style->text_transform.set = FALSE;
2516 style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE;
2518 style->direction.set = FALSE;
2519 style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR;
2521 style->block_progression.set = FALSE;
2522 style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB;
2524 style->writing_mode.set = FALSE;
2525 style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB;
2528 style->text_anchor.set = FALSE;
2529 style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START;
2532 style->opacity.value = SP_SCALE24_MAX;
2533 style->visibility.set = FALSE;
2534 style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE;
2535 style->display.set = FALSE;
2536 style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE;
2537 style->overflow.set = FALSE;
2538 style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE;
2540 style->color.type = SP_PAINT_TYPE_COLOR;
2541 sp_color_set_rgb_float(&style->color.value.color, 0.0, 0.0, 0.0);
2543 style->fill.type = SP_PAINT_TYPE_COLOR;
2544 sp_color_set_rgb_float(&style->fill.value.color, 0.0, 0.0, 0.0);
2545 style->fill_opacity.value = SP_SCALE24_MAX;
2546 style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO;
2548 style->stroke.type = SP_PAINT_TYPE_NONE;
2549 style->stroke.set = FALSE;
2550 sp_color_set_rgb_float(&style->stroke.value.color, 0.0, 0.0, 0.0);
2551 style->stroke_opacity.value = SP_SCALE24_MAX;
2553 style->stroke_width.set = FALSE;
2554 style->stroke_width.unit = SP_CSS_UNIT_NONE;
2555 style->stroke_width.computed = 1.0;
2557 style->stroke_linecap.set = FALSE;
2558 style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT;
2559 style->stroke_linejoin.set = FALSE;
2560 style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER;
2562 style->stroke_miterlimit.set = FALSE;
2563 style->stroke_miterlimit.value = 4.0;
2565 style->stroke_dash.n_dash = 0;
2566 style->stroke_dash.dash = NULL;
2567 style->stroke_dash.offset = 0.0;
2569 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
2570 g_free(style->marker[i].value);
2571 style->marker[i].set = FALSE;
2572 }
2574 style->filter.set = FALSE;
2575 style->filter.uri = NULL;
2576 style->filter.filter = NULL;
2578 style->enable_background.value = SP_CSS_BACKGROUND_ACCUMULATE;
2579 style->enable_background.set = false;
2580 style->enable_background.inherit = false;
2581 }
2585 /**
2586 *
2587 */
2588 static void
2589 sp_style_read_dash(SPStyle *style, gchar const *str)
2590 {
2591 /* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */
2592 style->stroke_dasharray_set = TRUE;
2594 if (strcmp(str, "inherit") == 0) {
2595 style->stroke_dasharray_inherit = true;
2596 return;
2597 }
2598 style->stroke_dasharray_inherit = false;
2600 NRVpathDash &dash = style->stroke_dash;
2601 g_free(dash.dash);
2602 dash.dash = NULL;
2604 if (strcmp(str, "none") == 0) {
2605 dash.n_dash = 0;
2606 return;
2607 }
2609 gint n_dash = 0;
2610 gdouble d[64];
2611 gchar *e = NULL;
2613 bool LineSolid=true;
2614 while (e != str && n_dash < 64) {
2615 /* TODO: Should allow <length> rather than just a unitless (px) number. */
2616 d[n_dash] = g_ascii_strtod(str, (char **) &e);
2617 if (d[n_dash] > 0.00000001)
2618 LineSolid = false;
2619 if (e != str) {
2620 n_dash += 1;
2621 str = e;
2622 }
2623 while (str && *str && !isalnum(*str)) str += 1;
2624 }
2626 if (LineSolid) {
2627 dash.n_dash = 0;
2628 return;
2629 }
2631 if (n_dash > 0) {
2632 dash.dash = g_new(gdouble, n_dash);
2633 memcpy(dash.dash, d, sizeof(gdouble) * n_dash);
2634 dash.n_dash = n_dash;
2635 }
2636 }
2639 /*#########################
2640 ## SPTextStyle operations
2641 #########################*/
2644 /**
2645 * Return new SPTextStyle object with default settings.
2646 */
2647 static SPTextStyle *
2648 sp_text_style_new()
2649 {
2650 SPTextStyle *ts = g_new0(SPTextStyle, 1);
2651 ts->refcount = 1;
2652 sp_text_style_clear(ts);
2654 ts->font.value = g_strdup("Bitstream Vera Sans");
2655 ts->font_family.value = g_strdup("Bitstream Vera Sans");
2657 return ts;
2658 }
2661 /**
2662 * Clear text style settings.
2663 */
2664 static void
2665 sp_text_style_clear(SPTextStyle *ts)
2666 {
2667 ts->font.set = FALSE;
2668 ts->font_family.set = FALSE;
2669 }
2673 /**
2674 * Reduce refcount of text style and possibly free it.
2675 */
2676 static SPTextStyle *
2677 sp_text_style_unref(SPTextStyle *st)
2678 {
2679 st->refcount -= 1;
2681 if (st->refcount < 1) {
2682 g_free(st->font.value);
2683 g_free(st->font_family.value);
2684 g_free(st);
2685 }
2687 return NULL;
2688 }
2692 /**
2693 * Return duplicate of text style.
2694 */
2695 static SPTextStyle *
2696 sp_text_style_duplicate_unset(SPTextStyle *st)
2697 {
2698 SPTextStyle *nt = g_new0(SPTextStyle, 1);
2699 nt->refcount = 1;
2701 nt->font.value = g_strdup(st->font.value);
2702 nt->font_family.value = g_strdup(st->font_family.value);
2704 return nt;
2705 }
2709 /**
2710 * Write SPTextStyle object into string.
2711 */
2712 static guint
2713 sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags)
2714 {
2715 gint d = 0;
2717 // We do not do diffing for text style
2718 if (flags == SP_STYLE_FLAG_IFDIFF)
2719 flags = SP_STYLE_FLAG_IFSET;
2721 d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags);
2722 return d;
2723 }
2727 /* The following sp_tyle_read_* functions ignore invalid values, as per
2728 * http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors.
2729 *
2730 * [However, the SVG spec is somewhat unclear as to whether the style attribute should
2731 * be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE
2732 * pairs, in which case SVG's error-handling rules
2733 * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.]
2734 */
2737 /**
2738 * Set SPIFloat object from string.
2739 */
2740 static void
2741 sp_style_read_ifloat(SPIFloat *val, gchar const *str)
2742 {
2743 if (!strcmp(str, "inherit")) {
2744 val->set = TRUE;
2745 val->inherit = TRUE;
2746 } else {
2747 gfloat value;
2748 if (sp_svg_number_read_f(str, &value)) {
2749 val->set = TRUE;
2750 val->inherit = FALSE;
2751 val->value = value;
2752 }
2753 }
2754 }
2758 /**
2759 * Set SPIScale24 object from string.
2760 */
2761 static void
2762 sp_style_read_iscale24(SPIScale24 *val, gchar const *str)
2763 {
2764 if (!strcmp(str, "inherit")) {
2765 val->set = TRUE;
2766 val->inherit = TRUE;
2767 } else {
2768 gfloat value;
2769 if (sp_svg_number_read_f(str, &value)) {
2770 val->set = TRUE;
2771 val->inherit = FALSE;
2772 value = CLAMP(value, 0.0f, (gfloat) SP_SCALE24_MAX);
2773 val->value = SP_SCALE24_FROM_FLOAT(value);
2774 }
2775 }
2776 }
2778 /**
2779 * Reads a style value and performs lookup based on the given style value enumerations.
2780 */
2781 static void
2782 sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict,
2783 bool const can_explicitly_inherit)
2784 {
2785 if ( can_explicitly_inherit && !strcmp(str, "inherit") ) {
2786 val->set = TRUE;
2787 val->inherit = TRUE;
2788 } else {
2789 for (unsigned i = 0; dict[i].key; i++) {
2790 if (!strcmp(str, dict[i].key)) {
2791 val->set = TRUE;
2792 val->inherit = FALSE;
2793 val->value = dict[i].value;
2794 /* Save copying for values not needing it */
2795 val->computed = val->value;
2796 break;
2797 }
2798 }
2799 }
2800 }
2804 /**
2805 * Set SPIString object from string.
2806 */
2807 static void
2808 sp_style_read_istring(SPIString *val, gchar const *str)
2809 {
2810 g_free(val->value);
2812 if (!strcmp(str, "inherit")) {
2813 val->set = TRUE;
2814 val->inherit = TRUE;
2815 val->value = NULL;
2816 } else {
2817 val->set = TRUE;
2818 val->inherit = FALSE;
2819 val->value = g_strdup(str);
2820 }
2821 }
2825 /**
2826 * Set SPILength object from string.
2827 */
2828 static void
2829 sp_style_read_ilength(SPILength *val, gchar const *str)
2830 {
2831 if (!strcmp(str, "inherit")) {
2832 val->set = TRUE;
2833 val->inherit = TRUE;
2834 } else {
2835 gdouble value;
2836 gchar *e;
2837 /** \todo fixme: Move this to standard place (Lauris) */
2838 value = g_ascii_strtod(str, &e);
2839 if ((gchar const *) e != str) {
2840 /** \todo
2841 * Allow the number of px per inch to vary (document preferences,
2842 * X server or whatever). E.g. don't fill in computed here, do
2843 * it at the same time as percentage units are done.
2844 */
2845 if (!*e) {
2846 /* Userspace */
2847 val->unit = SP_CSS_UNIT_NONE;
2848 val->computed = value;
2849 } else if (!strcmp(e, "px")) {
2850 /* Userspace */
2851 val->unit = SP_CSS_UNIT_PX;
2852 val->computed = value;
2853 } else if (!strcmp(e, "pt")) {
2854 /* Userspace / DEVICESCALE */
2855 val->unit = SP_CSS_UNIT_PT;
2856 val->computed = value * PX_PER_PT;
2857 } else if (!strcmp(e, "pc")) {
2858 /* 1 pica = 12pt; FIXME: add it to SPUnit */
2859 val->unit = SP_CSS_UNIT_PC;
2860 val->computed = value * PX_PER_PT * 12;
2861 } else if (!strcmp(e, "mm")) {
2862 val->unit = SP_CSS_UNIT_MM;
2863 val->computed = value * PX_PER_MM;
2864 } else if (!strcmp(e, "cm")) {
2865 val->unit = SP_CSS_UNIT_CM;
2866 val->computed = value * PX_PER_CM;
2867 } else if (!strcmp(e, "in")) {
2868 val->unit = SP_CSS_UNIT_IN;
2869 val->computed = value * PX_PER_IN;
2870 } else if (!strcmp(e, "em")) {
2871 /* EM square */
2872 val->unit = SP_CSS_UNIT_EM;
2873 val->value = value;
2874 } else if (!strcmp(e, "ex")) {
2875 /* ex square */
2876 val->unit = SP_CSS_UNIT_EX;
2877 val->value = value;
2878 } else if (!strcmp(e, "%")) {
2879 /* Percentage */
2880 val->unit = SP_CSS_UNIT_PERCENT;
2881 val->value = value * 0.01;
2882 } else {
2883 /* Invalid */
2884 return;
2885 }
2886 val->set = TRUE;
2887 val->inherit = FALSE;
2888 }
2889 }
2890 }
2892 /**
2893 * Set SPILengthOrNormal object from string.
2894 */
2895 static void
2896 sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str)
2897 {
2898 if (!strcmp(str, "normal")) {
2899 val->set = TRUE;
2900 val->inherit = FALSE;
2901 val->normal = TRUE;
2902 val->unit = SP_CSS_UNIT_NONE;
2903 val->value = val->computed = 0.0;
2904 } else {
2905 SPILength length;
2906 sp_style_read_ilength(&length, str);
2907 val->set = length.set;
2908 val->inherit = length.inherit;
2909 val->normal = FALSE;
2910 val->unit = length.unit;
2911 val->value = length.value;
2912 val->computed = length.computed;
2913 }
2914 }
2916 /**
2917 * Set SPITextDecoration object from string.
2918 */
2919 static void
2920 sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str)
2921 {
2922 if (!strcmp(str, "inherit")) {
2923 val->set = TRUE;
2924 val->inherit = TRUE;
2925 } else if (!strcmp(str, "none")) {
2926 val->set = TRUE;
2927 val->inherit = FALSE;
2928 val->underline = FALSE;
2929 val->overline = FALSE;
2930 val->line_through = FALSE;
2931 val->blink = FALSE;
2932 } else {
2933 bool found_underline = false;
2934 bool found_overline = false;
2935 bool found_line_through = false;
2936 bool found_blink = false;
2937 for ( ; *str ; str++ ) {
2938 if (*str == ' ') continue;
2939 if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) {
2940 found_underline = true;
2941 str += 9;
2942 } else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) {
2943 found_overline = true;
2944 str += 8;
2945 } else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) {
2946 found_line_through = true;
2947 str += 12;
2948 } else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) {
2949 found_blink = true;
2950 str += 5;
2951 } else {
2952 return; // invalid value
2953 }
2954 }
2955 if (!(found_underline || found_overline || found_line_through || found_blink)) {
2956 return; // invalid value: empty
2957 }
2958 val->set = TRUE;
2959 val->inherit = FALSE;
2960 val->underline = found_underline;
2961 val->overline = found_overline;
2962 val->line_through = found_line_through;
2963 val->blink = found_blink;
2964 }
2965 }
2967 /**
2968 * Set SPIPaint object from string containing an integer value.
2969 * \param document Ignored
2970 */
2971 static void
2972 sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2973 {
2974 paint->currentcolor = FALSE; /* currentColor not a valid <color>. */
2975 if (!strcmp(str, "inherit")) {
2976 paint->set = TRUE;
2977 paint->inherit = TRUE;
2978 } else {
2979 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
2980 if (rgb0 != 0xff) {
2981 paint->type = SP_PAINT_TYPE_COLOR;
2982 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2983 paint->set = TRUE;
2984 paint->inherit = FALSE;
2985 }
2986 }
2987 }
2990 /**
2991 * Set SPIPaint object from string.
2992 *
2993 * \pre paint == \&style.fill || paint == \&style.stroke.
2994 */
2995 static void
2996 sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2997 {
2998 while (isspace(*str)) {
2999 ++str;
3000 }
3002 if (streq(str, "inherit")) {
3003 paint->set = TRUE;
3004 paint->inherit = TRUE;
3005 paint->currentcolor = FALSE;
3006 } else if (streq(str, "currentColor") && paint != &style->color) {
3007 paint->set = TRUE;
3008 paint->inherit = FALSE;
3009 paint->currentcolor = TRUE;
3010 } else if (streq(str, "none") && paint != &style->color) {
3011 paint->type = SP_PAINT_TYPE_NONE;
3012 paint->set = TRUE;
3013 paint->inherit = FALSE;
3014 paint->currentcolor = FALSE;
3015 } else if (strneq(str, "url", 3) && paint != &style->color) {
3016 // this is alloc'd uri, but seems to be shared with a parent
3017 // potentially, so it's not any easy g_free case...
3018 paint->value.paint.uri = extract_uri(str);
3019 if (paint->value.paint.uri == NULL || *(paint->value.paint.uri) == '\0') {
3020 paint->type = SP_PAINT_TYPE_NONE;
3021 return;
3022 }
3023 paint->type = SP_PAINT_TYPE_PAINTSERVER;
3024 paint->set = TRUE;
3025 paint->inherit = FALSE;
3026 paint->currentcolor = FALSE;
3027 if (document) {
3028 SPObject *ps = sp_uri_reference_resolve(document, str);
3029 if (ps && SP_IS_PAINT_SERVER(ps)) {
3030 paint->value.paint.server = SP_PAINT_SERVER(ps);
3031 if (style->object && !style->cloned) {
3032 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
3033 if (paint == &style->fill) {
3034 style->fill_hreffed = true;
3035 } else {
3036 assert(paint == &style->stroke);
3037 style->stroke_hreffed = true;
3038 }
3039 }
3040 if (style->object || style->cloned) {
3041 SPObject *server = paint->value.paint.server;
3042 sigc::connection release_connection
3043 = server->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_paint_server_release), style));
3044 sigc::connection modified_connection
3045 = server->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_paint_server_modified), style));
3046 if (paint == &style->fill) {
3047 style->fill_release_connection = release_connection;
3048 style->fill_modified_connection = modified_connection;
3049 } else {
3050 assert(paint == &style->stroke);
3051 style->stroke_release_connection = release_connection;
3052 style->stroke_modified_connection = modified_connection;
3053 }
3054 }
3055 } else {
3056 paint->value.paint.server = NULL;
3057 }
3058 }
3059 } else {
3060 guint32 const rgb0 = sp_svg_read_color(str, &str, 0xff);
3061 if (rgb0 != 0xff) {
3062 paint->type = SP_PAINT_TYPE_COLOR;
3063 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
3064 paint->set = TRUE;
3065 paint->inherit = FALSE;
3066 paint->currentcolor = FALSE;
3068 while (g_ascii_isspace(*str)) {
3069 ++str;
3070 }
3071 if (strneq(str, "icc-color(", 10)) {
3072 SVGICCColor* tmp = new SVGICCColor();
3073 if ( ! sp_svg_read_icc_color( str, &str, tmp ) ) {
3074 delete tmp;
3075 tmp = 0;
3076 }
3077 paint->iccColor = tmp;
3078 }
3079 }
3080 }
3081 }
3085 /**
3086 * Set SPIFontSize object from string.
3087 */
3088 static void
3089 sp_style_read_ifontsize(SPIFontSize *val, gchar const *str)
3090 {
3091 if (!strcmp(str, "inherit")) {
3092 val->set = TRUE;
3093 val->inherit = TRUE;
3094 } else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) {
3095 for (unsigned i = 0; enum_font_size[i].key; i++) {
3096 if (!strcmp(str, enum_font_size[i].key)) {
3097 val->set = TRUE;
3098 val->inherit = FALSE;
3099 val->type = SP_FONT_SIZE_LITERAL;
3100 val->value = enum_font_size[i].value;
3101 return;
3102 }
3103 }
3104 /* Invalid */
3105 return;
3106 } else {
3107 gdouble value;
3108 gchar *e;
3109 /* fixme: Move this to standard place (Lauris) */
3110 value = g_ascii_strtod(str, &e);
3111 if ((gchar const *) e != str) {
3112 if (!*e) {
3113 /* Userspace */
3114 } else if (!strcmp(e, "px")) {
3115 /* Userspace */
3116 } else if (!strcmp(e, "pt")) {
3117 /* Userspace * DEVICESCALE */
3118 value *= PX_PER_PT;
3119 } else if (!strcmp(e, "pc")) {
3120 /* 12pt */
3121 value *= PX_PER_PT * 12.0;
3122 } else if (!strcmp(e, "mm")) {
3123 value *= PX_PER_MM;
3124 } else if (!strcmp(e, "cm")) {
3125 value *= PX_PER_CM;
3126 } else if (!strcmp(e, "in")) {
3127 value *= PX_PER_IN;
3128 } else if (!strcmp(e, "%")) {
3129 /* Percentage */
3130 val->set = TRUE;
3131 val->inherit = FALSE;
3132 val->type = SP_FONT_SIZE_PERCENTAGE;
3133 val->value = SP_F8_16_FROM_FLOAT(value / 100.0);
3134 return;
3135 } else {
3136 /* Invalid */
3137 return;
3138 }
3139 /* Length */
3140 val->set = TRUE;
3141 val->inherit = FALSE;
3142 val->type = SP_FONT_SIZE_LENGTH;
3143 val->computed = value;
3144 return;
3145 }
3146 }
3147 }
3151 /**
3152 * Set SPIFilter object from string.
3153 */
3154 static void
3155 sp_style_read_ifilter(gchar const *str, SPStyle * style, SPDocument *document)
3156 {
3157 SPIFilter *f = &(style->filter);
3158 /* Try all possible values: inherit, none, uri */
3159 if (streq(str, "inherit")) {
3160 f->set = TRUE;
3161 f->inherit = TRUE;
3162 f->filter = NULL;
3163 } else if(streq(str, "none")) {
3164 f->set = TRUE;
3165 f->inherit = FALSE;
3166 f->filter = NULL;
3167 } else if (strneq(str, "url", 3)) {
3168 f->uri = extract_uri(str);
3169 if(f->uri == NULL || f->uri[0] == '\0') {
3170 g_warning("Specified filter url is empty");
3171 f->set = TRUE;
3172 f->inherit = FALSE;
3173 f->filter = NULL;
3174 return;
3175 }
3176 f->set = TRUE;
3177 f->inherit = FALSE;
3178 f->filter = NULL;
3179 if (document) {
3180 SPObject *obj = sp_uri_reference_resolve(document, str);
3181 if (SP_IS_FILTER(obj)) {
3182 f->filter = SP_FILTER(obj);
3183 if (style->object && !style->cloned) {
3184 sp_object_href(obj, style);
3185 style->filter_hreffed = true;
3186 }
3187 if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
3188 SPObject *filter = style->filter.filter;
3189 style->filter_release_connection
3190 = filter->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_filter_release), style));
3191 style->filter_modified_connection
3192 = filter->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_filter_modified), style));
3193 }
3194 } else {
3195 g_warning("Element '%s' not found or is not a filter", f->uri);
3196 }
3197 }
3199 } else {
3200 /* We shouldn't reach this if SVG input is well-formed */
3201 f->set = FALSE;
3202 f->inherit = FALSE;
3203 f->filter = NULL;
3204 f->uri = NULL;
3205 }
3206 }
3208 /**
3209 * Set SPIEnum object from repr attribute.
3210 */
3211 static void
3212 sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr,
3213 gchar const *key, SPStyleEnum const *dict,
3214 bool const can_explicitly_inherit)
3215 {
3216 gchar const *str = repr->attribute(key);
3217 if (str) {
3218 sp_style_read_ienum(val, str, dict, can_explicitly_inherit);
3219 }
3220 }
3224 /**
3225 * Set SPILength object from repr attribute.
3226 */
3227 static void
3228 sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key)
3229 {
3230 gchar const *str = repr->attribute(key);
3231 if (str) {
3232 sp_style_read_ilength(val, str);
3233 }
3234 }
3236 /**
3237 * Set SPIFontSize object from repr attribute.
3238 */
3239 static void
3240 sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key)
3241 {
3242 gchar const *str = repr->attribute(key);
3243 if (str) {
3244 sp_style_read_ifontsize(val, str);
3245 }
3246 }
3249 /**
3250 * Set SPIFloat object from repr attribute.
3251 */
3252 static void
3253 sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key)
3254 {
3255 gchar const *str = repr->attribute(key);
3256 if (str) {
3257 sp_style_read_ifloat(val, str);
3258 }
3259 }
3262 /**
3263 * Write SPIFloat object into string.
3264 */
3265 static gint
3266 sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key,
3267 SPIFloat const *const val, SPIFloat const *const base, guint const flags)
3268 {
3269 Inkscape::CSSOStringStream os;
3271 if ((flags & SP_STYLE_FLAG_ALWAYS)
3272 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3273 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3274 && (!base->set || (val->value != base->value))))
3275 {
3276 if (val->inherit) {
3277 return g_snprintf(p, len, "%s:inherit;", key);
3278 } else {
3279 os << key << ":" << val->value << ";";
3280 return g_strlcpy(p, os.str().c_str(), len);
3281 }
3282 }
3283 return 0;
3284 }
3287 /**
3288 * Write SPIScale24 object into string.
3289 */
3290 static gint
3291 sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key,
3292 SPIScale24 const *const val, SPIScale24 const *const base,
3293 guint const flags)
3294 {
3295 Inkscape::CSSOStringStream os;
3297 if ((flags & SP_STYLE_FLAG_ALWAYS)
3298 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3299 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3300 && (!base->set || (val->value != base->value))))
3301 {
3302 if (val->inherit) {
3303 return g_snprintf(p, len, "%s:inherit;", key);
3304 } else {
3305 os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";";
3306 return g_strlcpy(p, os.str().c_str(), len);
3307 }
3308 }
3309 return 0;
3310 }
3313 /**
3314 * Write SPIEnum object into string.
3315 */
3316 static gint
3317 sp_style_write_ienum(gchar *p, gint const len, gchar const *const key,
3318 SPStyleEnum const *const dict,
3319 SPIEnum const *const val, SPIEnum const *const base, guint const flags)
3320 {
3321 if ((flags & SP_STYLE_FLAG_ALWAYS)
3322 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3323 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3324 && (!base->set || (val->computed != base->computed))))
3325 {
3326 if (val->inherit) {
3327 return g_snprintf(p, len, "%s:inherit;", key);
3328 }
3329 for (unsigned i = 0; dict[i].key; i++) {
3330 if (dict[i].value == static_cast< gint > (val->value) ) {
3331 return g_snprintf(p, len, "%s:%s;", key, dict[i].key);
3332 }
3333 }
3334 }
3335 return 0;
3336 }
3340 /**
3341 * Write SPIString object into string.
3342 */
3343 static gint
3344 sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
3345 SPIString const *const val, SPIString const *const base, guint const flags)
3346 {
3347 if ((flags & SP_STYLE_FLAG_ALWAYS)
3348 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3349 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3350 && (!base->set || strcmp(val->value, base->value))))
3351 {
3352 if (val->inherit) {
3353 return g_snprintf(p, len, "%s:inherit;", key);
3354 } else {
3355 return g_snprintf(p, len, "%s:%s;", key, val->value);
3356 }
3357 }
3358 return 0;
3359 }
3362 /**
3363 *
3364 */
3365 static bool
3366 sp_length_differ(SPILength const *const a, SPILength const *const b)
3367 {
3368 if (a->unit != b->unit) {
3369 if (a->unit == SP_CSS_UNIT_EM) return true;
3370 if (a->unit == SP_CSS_UNIT_EX) return true;
3371 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3372 if (b->unit == SP_CSS_UNIT_EM) return true;
3373 if (b->unit == SP_CSS_UNIT_EX) return true;
3374 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3375 }
3377 return (a->computed != b->computed);
3378 }
3382 /**
3383 * Write SPILength object into string.
3384 */
3385 static gint
3386 sp_style_write_ilength(gchar *p, gint const len, gchar const *const key,
3387 SPILength const *const val, SPILength const *const base, guint const flags)
3388 {
3389 Inkscape::CSSOStringStream os;
3391 if ((flags & SP_STYLE_FLAG_ALWAYS)
3392 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3393 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3394 && (!base->set || sp_length_differ(val, base))))
3395 {
3396 if (val->inherit) {
3397 return g_snprintf(p, len, "%s:inherit;", key);
3398 } else {
3399 switch (val->unit) {
3400 case SP_CSS_UNIT_NONE:
3401 os << key << ":" << val->computed << ";";
3402 return g_strlcpy(p, os.str().c_str(), len);
3403 break;
3404 case SP_CSS_UNIT_PX:
3405 os << key << ":" << val->computed << "px;";
3406 return g_strlcpy(p, os.str().c_str(), len);
3407 break;
3408 case SP_CSS_UNIT_PT:
3409 os << key << ":" << val->computed * PT_PER_PX << "pt;";
3410 return g_strlcpy(p, os.str().c_str(), len);
3411 break;
3412 case SP_CSS_UNIT_PC:
3413 os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;";
3414 return g_strlcpy(p, os.str().c_str(), len);
3415 break;
3416 case SP_CSS_UNIT_MM:
3417 os << key << ":" << val->computed * MM_PER_PX << "mm;";
3418 return g_strlcpy(p, os.str().c_str(), len);
3419 break;
3420 case SP_CSS_UNIT_CM:
3421 os << key << ":" << val->computed * CM_PER_PX << "cm;";
3422 return g_strlcpy(p, os.str().c_str(), len);
3423 break;
3424 case SP_CSS_UNIT_IN:
3425 os << key << ":" << val->computed * IN_PER_PX << "in;";
3426 return g_strlcpy(p, os.str().c_str(), len);
3427 break;
3428 case SP_CSS_UNIT_EM:
3429 os << key << ":" << val->value << "em;";
3430 return g_strlcpy(p, os.str().c_str(), len);
3431 break;
3432 case SP_CSS_UNIT_EX:
3433 os << key << ":" << val->value << "ex;";
3434 return g_strlcpy(p, os.str().c_str(), len);
3435 break;
3436 case SP_CSS_UNIT_PERCENT:
3437 os << key << ":" << (val->value * 100.0) << "%;";
3438 return g_strlcpy(p, os.str().c_str(), len);
3439 break;
3440 default:
3441 /* Invalid */
3442 break;
3443 }
3444 }
3445 }
3446 return 0;
3447 }
3450 /**
3451 *
3452 */
3453 static bool
3454 sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b)
3455 {
3456 if (a->normal != b->normal) return true;
3457 if (a->normal) return false;
3459 if (a->unit != b->unit) {
3460 if (a->unit == SP_CSS_UNIT_EM) return true;
3461 if (a->unit == SP_CSS_UNIT_EX) return true;
3462 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3463 if (b->unit == SP_CSS_UNIT_EM) return true;
3464 if (b->unit == SP_CSS_UNIT_EX) return true;
3465 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3466 }
3468 return (a->computed != b->computed);
3469 }
3471 /**
3472 * Write SPILengthOrNormal object into string.
3473 */
3474 static gint
3475 sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key,
3476 SPILengthOrNormal const *const val,
3477 SPILengthOrNormal const *const base,
3478 guint const flags)
3479 {
3480 if ((flags & SP_STYLE_FLAG_ALWAYS)
3481 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3482 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3483 && (!base->set || sp_lengthornormal_differ(val, base))))
3484 {
3485 if (val->normal) {
3486 return g_snprintf(p, len, "%s:normal;", key);
3487 } else {
3488 SPILength length;
3489 length.set = val->set;
3490 length.inherit = val->inherit;
3491 length.unit = val->unit;
3492 length.value = val->value;
3493 length.computed = val->computed;
3494 return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS);
3495 }
3496 }
3497 return 0;
3498 }
3500 /**
3501 *
3502 */
3503 static bool
3504 sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b)
3505 {
3506 return a->underline != b->underline
3507 || a->overline != b->overline
3508 || a->line_through != b->line_through
3509 || a->blink != b->blink;
3510 }
3512 /**
3513 * Write SPITextDecoration object into string.
3514 */
3515 static gint
3516 sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key,
3517 SPITextDecoration const *const val,
3518 SPITextDecoration const *const base,
3519 guint const flags)
3520 {
3521 Inkscape::CSSOStringStream os;
3523 if ((flags & SP_STYLE_FLAG_ALWAYS)
3524 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3525 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3526 && (!base->set || sp_textdecoration_differ(val, base))))
3527 {
3528 if (val->inherit) {
3529 return g_snprintf(p, len, "%s:inherit;", key);
3530 } else {
3531 os << key << ":";
3532 if (val->underline || val->overline || val->line_through || val->blink) {
3533 if (val->underline) os << " underline";
3534 if (val->overline) os << " overline";
3535 if (val->line_through) os << " line-through";
3536 if (val->blink) os << " blink";
3537 } else
3538 os << "none";
3539 os << ";";
3540 return g_strlcpy(p, os.str().c_str(), len);
3541 }
3542 }
3543 return 0;
3544 }
3546 /**
3547 *
3548 */
3549 static bool
3550 sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
3551 {
3552 if (a->type != b->type)
3553 return true;
3554 if (a->type == SP_PAINT_TYPE_COLOR)
3555 return !(sp_color_is_equal(&a->value.color, &b->value.color)
3556 && ((a->iccColor == b->iccColor)
3557 || (a->iccColor && b->iccColor
3558 && (a->iccColor->colorProfile == b->iccColor->colorProfile)
3559 && (a->iccColor->colors == b->iccColor->colors))));
3560 /* todo: Allow for epsilon differences in iccColor->colors, e.g. changes small enough not to show up
3561 * in the string representation. */
3562 if (a->type == SP_PAINT_TYPE_PAINTSERVER)
3563 return (a->value.paint.server != b->value.paint.server);
3564 return false;
3565 }
3569 /**
3570 * Write SPIPaint object into string.
3571 */
3572 static gint
3573 sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
3574 SPIPaint const *const paint, SPIPaint const *const base, guint const flags)
3575 {
3576 if ((flags & SP_STYLE_FLAG_ALWAYS)
3577 || ((flags & SP_STYLE_FLAG_IFSET) && paint->set)
3578 || ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set
3579 && (!base->set || sp_paint_differ(paint, base))))
3580 {
3581 if (paint->inherit) {
3582 return g_snprintf(b, len, "%s:inherit;", key);
3583 } else if (paint->currentcolor) {
3584 return g_snprintf(b, len, "%s:currentColor;", key);
3585 } else {
3586 switch (paint->type) {
3587 case SP_PAINT_TYPE_COLOR: {
3588 char color_buf[8];
3589 sp_svg_write_color(color_buf, sizeof(color_buf), sp_color_get_rgba32_ualpha(&paint->value.color, 0));
3590 if (paint->iccColor) {
3591 CSSOStringStream css;
3592 css << color_buf << " icc-color(" << paint->iccColor->colorProfile;
3593 for (vector<double>::const_iterator i(paint->iccColor->colors.begin()),
3594 iEnd(paint->iccColor->colors.end());
3595 i != iEnd; ++i) {
3596 css << ", " << *i;
3597 }
3598 css << ')';
3599 return g_snprintf(b, len, "%s:%s;", key, css.gcharp());
3600 } else {
3601 return g_snprintf(b, len, "%s:%s;", key, color_buf);
3602 }
3603 }
3604 case SP_PAINT_TYPE_PAINTSERVER:
3605 return g_snprintf(b, len, "%s:url(%s);", key, paint->value.paint.uri);
3606 default:
3607 break;
3608 }
3609 return g_snprintf(b, len, "%s:none;", key);
3610 }
3611 }
3612 return 0;
3613 }
3616 /**
3617 *
3618 */
3619 static bool
3620 sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b)
3621 {
3622 if (a->type != b->type)
3623 return true;
3624 if (a->type == SP_FONT_SIZE_LENGTH) {
3625 if (a->computed != b->computed)
3626 return true;
3627 } else {
3628 if (a->value != b->value)
3629 return true;
3630 }
3631 return false;
3632 }
3635 /**
3636 * Write SPIFontSize object into string.
3637 */
3638 static gint
3639 sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key,
3640 SPIFontSize const *const val, SPIFontSize 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 && (!base->set || sp_fontsize_differ(val, base))))
3647 {
3648 if (val->inherit) {
3649 return g_snprintf(p, len, "%s:inherit;", key);
3650 } else if (val->type == SP_FONT_SIZE_LITERAL) {
3651 for (unsigned i = 0; enum_font_size[i].key; i++) {
3652 if (enum_font_size[i].value == static_cast< gint > (val->value) ) {
3653 return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key);
3654 }
3655 }
3656 } else if (val->type == SP_FONT_SIZE_LENGTH) {
3657 Inkscape::CSSOStringStream os;
3658 os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
3659 return g_strlcpy(p, os.str().c_str(), len);
3660 } else if (val->type == SP_FONT_SIZE_PERCENTAGE) {
3661 Inkscape::CSSOStringStream os;
3662 os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;";
3663 return g_strlcpy(p, os.str().c_str(), len);
3664 }
3665 }
3666 return 0;
3667 }
3670 /**
3671 * Write SPIFilter object into string.
3672 */
3673 static gint
3674 sp_style_write_ifilter(gchar *p, gint const len, gchar const *key,
3675 SPIFilter const *const val, SPIFilter const *const base,
3676 guint const flags)
3677 {
3678 if ((flags & SP_STYLE_FLAG_ALWAYS)
3679 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3680 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set))
3681 {
3682 if (val->inherit) {
3683 return g_snprintf(p, len, "%s:inherit;", key);
3684 } else if (val->uri) {
3685 return g_snprintf(p, len, "%s:url(%s);", key, val->uri);
3686 }
3687 }
3690 return 0;
3691 }
3694 /**
3695 * Clear paint object, and disconnect style from paintserver (if present).
3696 */
3697 static void
3698 sp_style_paint_clear(SPStyle *style, SPIPaint *paint)
3699 {
3700 if ((paint->type == SP_PAINT_TYPE_PAINTSERVER) && paint->value.paint.server) {
3701 if (paint == &style->fill) {
3702 if (style->fill_hreffed) {
3703 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3704 style->fill_hreffed = false;
3705 }
3706 style->fill_release_connection.disconnect();
3707 style->fill_modified_connection.disconnect();
3708 } else {
3709 assert(paint == &style->stroke); // Only fill & stroke can have a paint server.
3710 if (style->stroke_hreffed) {
3711 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3712 style->stroke_hreffed = false;
3713 }
3714 style->stroke_release_connection.disconnect();
3715 style->stroke_modified_connection.disconnect();
3716 }
3718 paint->value.paint.server = NULL;
3719 }
3720 paint->value.paint.uri = NULL;
3721 paint->type = SP_PAINT_TYPE_NONE;
3722 delete paint->iccColor;
3723 paint->iccColor = NULL;
3724 }
3727 /**
3728 * Clear filter object, and disconnect style from paintserver (if present).
3729 */
3730 static void
3731 sp_style_filter_clear(SPStyle *style)
3732 {
3734 if (style->filter_hreffed) {
3735 sp_object_hunref(SP_OBJECT(style->filter.filter), style);
3736 style->filter_hreffed = false;
3737 }
3738 style->filter_release_connection.disconnect();
3739 style->filter_modified_connection.disconnect();
3741 style->filter.filter = NULL;
3742 }
3745 // FIXME: Everything below this line belongs in a different file - css-chemistry?
3747 void
3748 sp_style_set_property_url (SPObject *item, gchar const *property, SPObject *linked, bool recursive)
3749 {
3750 Inkscape::XML::Node *repr = SP_OBJECT_REPR(item);
3752 if (repr == NULL) return;
3754 g_return_if_fail(linked != NULL);
3756 gchar *val = g_strdup_printf("url(#%s)", SP_OBJECT_ID(linked));
3758 SPCSSAttr *css = sp_repr_css_attr_new();
3759 sp_repr_css_set_property(css, property, val);
3760 g_free(val);
3761 if (recursive) {
3762 sp_repr_css_change_recursive(repr, css, "style");
3763 } else {
3764 sp_repr_css_change(repr, css, "style");
3765 }
3766 sp_repr_css_attr_unref(css);
3767 }
3770 /**
3771 * Clear all style property attributes in object.
3772 */
3773 void
3774 sp_style_unset_property_attrs(SPObject *o)
3775 {
3776 if (!o) return;
3778 SPStyle *style = SP_OBJECT_STYLE(o);
3779 if (!style) return;
3781 Inkscape::XML::Node *repr = SP_OBJECT_REPR(o);
3782 if (!repr) return;
3784 if (style->opacity.set) {
3785 repr->setAttribute("opacity", NULL);
3786 }
3787 if (style->color.set) {
3788 repr->setAttribute("color", NULL);
3789 }
3790 if (style->fill.set) {
3791 repr->setAttribute("fill", NULL);
3792 }
3793 if (style->fill_opacity.set) {
3794 repr->setAttribute("fill-opacity", NULL);
3795 }
3796 if (style->fill_rule.set) {
3797 repr->setAttribute("fill-rule", NULL);
3798 }
3799 if (style->stroke.set) {
3800 repr->setAttribute("stroke", NULL);
3801 }
3802 if (style->stroke_width.set) {
3803 repr->setAttribute("stroke-width", NULL);
3804 }
3805 if (style->stroke_linecap.set) {
3806 repr->setAttribute("stroke-linecap", NULL);
3807 }
3808 if (style->stroke_linejoin.set) {
3809 repr->setAttribute("stroke-linejoin", NULL);
3810 }
3811 if (style->marker[SP_MARKER_LOC].set) {
3812 repr->setAttribute("marker", NULL);
3813 }
3814 if (style->marker[SP_MARKER_LOC_START].set) {
3815 repr->setAttribute("marker-start", NULL);
3816 }
3817 if (style->marker[SP_MARKER_LOC_MID].set) {
3818 repr->setAttribute("marker-mid", NULL);
3819 }
3820 if (style->marker[SP_MARKER_LOC_END].set) {
3821 repr->setAttribute("marker-end", NULL);
3822 }
3823 if (style->stroke_opacity.set) {
3824 repr->setAttribute("stroke-opacity", NULL);
3825 }
3826 if (style->stroke_dasharray_set) {
3827 repr->setAttribute("stroke-dasharray", NULL);
3828 }
3829 if (style->stroke_dashoffset_set) {
3830 repr->setAttribute("stroke-dashoffset", NULL);
3831 }
3832 if (style->text_private && style->text->font_family.set) {
3833 repr->setAttribute("font-family", NULL);
3834 }
3835 if (style->text_anchor.set) {
3836 repr->setAttribute("text-anchor", NULL);
3837 }
3838 if (style->writing_mode.set) {
3839 repr->setAttribute("writing_mode", NULL);
3840 }
3841 if (style->filter.set) {
3842 repr->setAttribute("filter", NULL);
3843 }
3844 if (style->enable_background.set) {
3845 repr->setAttribute("enable-background", NULL);
3846 }
3847 }
3849 /**
3850 * \pre style != NULL.
3851 * \pre flags in {IFSET, ALWAYS}.
3852 */
3853 SPCSSAttr *
3854 sp_css_attr_from_style(SPStyle const *const style, guint const flags)
3855 {
3856 g_return_val_if_fail(style != NULL, NULL);
3857 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3858 (flags == SP_STYLE_FLAG_ALWAYS) ),
3859 NULL);
3860 gchar *style_str = sp_style_write_string(style, flags);
3861 SPCSSAttr *css = sp_repr_css_attr_new();
3862 sp_repr_css_attr_add_from_string(css, style_str);
3863 g_free(style_str);
3864 return css;
3865 }
3868 /**
3869 * \pre object != NULL
3870 * \pre flags in {IFSET, ALWAYS}.
3871 */
3872 SPCSSAttr *
3873 sp_css_attr_from_object(SPObject *object, guint const flags)
3874 {
3875 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3876 (flags == SP_STYLE_FLAG_ALWAYS) ),
3877 NULL);
3878 SPStyle const *const style = SP_OBJECT_STYLE(object);
3879 if (style == NULL)
3880 return NULL;
3881 return sp_css_attr_from_style(style, flags);
3882 }
3884 /**
3885 * Unset any text-related properties
3886 */
3887 SPCSSAttr *
3888 sp_css_attr_unset_text(SPCSSAttr *css)
3889 {
3890 sp_repr_css_set_property(css, "font", NULL); // not implemented yet
3891 sp_repr_css_set_property(css, "font-size", NULL);
3892 sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet
3893 sp_repr_css_set_property(css, "font-style", NULL);
3894 sp_repr_css_set_property(css, "font-variant", NULL);
3895 sp_repr_css_set_property(css, "font-weight", NULL);
3896 sp_repr_css_set_property(css, "font-stretch", NULL);
3897 sp_repr_css_set_property(css, "font-family", NULL);
3898 sp_repr_css_set_property(css, "text-indent", NULL);
3899 sp_repr_css_set_property(css, "text-align", NULL);
3900 sp_repr_css_set_property(css, "text-decoration", NULL);
3901 sp_repr_css_set_property(css, "line-height", NULL);
3902 sp_repr_css_set_property(css, "letter-spacing", NULL);
3903 sp_repr_css_set_property(css, "word-spacing", NULL);
3904 sp_repr_css_set_property(css, "text-transform", NULL);
3905 sp_repr_css_set_property(css, "direction", NULL);
3906 sp_repr_css_set_property(css, "block-progression", NULL);
3907 sp_repr_css_set_property(css, "writing-mode", NULL);
3908 sp_repr_css_set_property(css, "text-anchor", NULL);
3909 sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet
3910 sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet
3911 sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet
3912 sp_repr_css_set_property(css, "baseline-shift", NULL); // not implemented yet
3914 return css;
3915 }
3917 bool
3918 is_url(char const *p)
3919 {
3920 if (p == NULL)
3921 return false;
3922 /** \todo
3923 * FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs
3924 * in property values must start with 'url('.
3925 */
3926 return (g_ascii_strncasecmp(p, "url(", 4) == 0);
3927 }
3929 /**
3930 * Unset any properties that contain URI values.
3931 *
3932 * Used for storing style that will be reused across documents when carrying
3933 * the referenced defs is impractical.
3934 */
3935 SPCSSAttr *
3936 sp_css_attr_unset_uris(SPCSSAttr *css)
3937 {
3938 // All properties that may hold <uri> or <paint> according to SVG 1.1
3939 if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL);
3940 if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL);
3941 if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL);
3942 if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL);
3943 if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL);
3944 if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL);
3945 if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL);
3946 if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL);
3947 if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL);
3948 if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL);
3950 return css;
3951 }
3953 /**
3954 * Scale a single-value property.
3955 */
3956 void
3957 sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property,
3958 double ex, bool only_with_units = false)
3959 {
3960 gchar const *w = sp_repr_css_property(css, property, NULL);
3961 if (w) {
3962 gchar *units = NULL;
3963 double wd = g_ascii_strtod(w, &units) * ex;
3964 if (w == units) {// nothing converted, non-numeric value
3965 return;
3966 }
3967 if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) {
3968 // only_with_units, but no units found, so do nothing.
3969 return;
3970 }
3971 Inkscape::CSSOStringStream os;
3972 os << wd << units; // reattach units
3973 sp_repr_css_set_property(css, property, os.str().c_str());
3974 }
3975 }
3977 /**
3978 * Scale a list-of-values property.
3979 */
3980 void
3981 sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex)
3982 {
3983 gchar const *string = sp_repr_css_property(css, property, NULL);
3984 if (string) {
3985 Inkscape::CSSOStringStream os;
3986 gchar **a = g_strsplit(string, ",", 10000);
3987 bool first = true;
3988 for (gchar **i = a; i != NULL; i++) {
3989 gchar *w = *i;
3990 if (w == NULL)
3991 break;
3992 gchar *units = NULL;
3993 double wd = g_ascii_strtod(w, &units) * ex;
3994 if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing
3995 g_strfreev(a);
3996 return;
3997 }
3998 if (!first) {
3999 os << ",";
4000 }
4001 os << wd << units; // reattach units
4002 first = false;
4003 }
4004 sp_repr_css_set_property(css, property, os.str().c_str());
4005 g_strfreev(a);
4006 }
4007 }
4009 /**
4010 * Scale any properties that may hold <length> by ex.
4011 */
4012 SPCSSAttr *
4013 sp_css_attr_scale(SPCSSAttr *css, double ex)
4014 {
4015 sp_css_attr_scale_property_single(css, "baseline-shift", ex);
4016 sp_css_attr_scale_property_single(css, "stroke-width", ex);
4017 sp_css_attr_scale_property_list (css, "stroke-dasharray", ex);
4018 sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex);
4019 sp_css_attr_scale_property_single(css, "font-size", ex);
4020 sp_css_attr_scale_property_single(css, "kerning", ex);
4021 sp_css_attr_scale_property_single(css, "letter-spacing", ex);
4022 sp_css_attr_scale_property_single(css, "word-spacing", ex);
4023 sp_css_attr_scale_property_single(css, "line-height", ex, true);
4025 return css;
4026 }
4029 /**
4030 * Remove quotes from SPIString object value.
4031 *
4032 * \todo FIXME: now used for font family, but perhaps this should apply to
4033 * ALL strings (check CSS spec), in which case this should be part of
4034 * read_istring.
4035 */
4036 static void
4037 css2_unescape_unquote(SPIString *val)
4038 {
4039 if (val->set && val->value && strlen(val->value) >= 2) {
4041 /// \todo unescape all \-escaped chars
4043 int l = strlen(val->value);
4044 if ( ( val->value[0] == '"' && val->value[l - 1] == '"' ) ||
4045 ( val->value[0] == '\'' && val->value[l - 1] == '\'' ) ) {
4046 memcpy(val->value, val->value + 1, l - 2);
4047 val->value[l - 2] = '\0';
4048 }
4049 }
4050 }
4053 /*
4054 Local Variables:
4055 mode:c++
4056 c-file-style:"stroustrup"
4057 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
4058 indent-tabs-mode:nil
4059 fill-column:99
4060 End:
4061 */
4062 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :