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 sp_style_paint_clear(SPStyle *style, SPIPaint *paint);
160 static void sp_style_filter_clear(SPStyle *style);
162 #define SPS_READ_IENUM_IF_UNSET(v,s,d,i) if (!(v)->set) {sp_style_read_ienum((v), (s), (d), (i));}
163 #define SPS_READ_PENUM_IF_UNSET(v,r,k,d,i) if (!(v)->set) {sp_style_read_penum((v), (r), (k), (d), (i));}
165 #define SPS_READ_ILENGTH_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ilength((v), (s));}
166 #define SPS_READ_PLENGTH_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_plength((v), (r), (k));}
168 #define SPS_READ_PFLOAT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfloat((v), (r), (k));}
170 #define SPS_READ_IFONTSIZE_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ifontsize((v), (s));}
171 #define SPS_READ_PFONTSIZE_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfontsize((v), (r), (k));}
173 static void sp_style_merge_from_object_stylesheet(SPStyle *, SPObject const *);
175 struct SPStyleEnum {
176 gchar const *key;
177 gint value;
178 };
180 static SPStyleEnum const enum_fill_rule[] = {
181 {"nonzero", SP_WIND_RULE_NONZERO},
182 {"evenodd", SP_WIND_RULE_EVENODD},
183 {NULL, -1}
184 };
186 static SPStyleEnum const enum_stroke_linecap[] = {
187 {"butt", SP_STROKE_LINECAP_BUTT},
188 {"round", SP_STROKE_LINECAP_ROUND},
189 {"square", SP_STROKE_LINECAP_SQUARE},
190 {NULL, -1}
191 };
193 static SPStyleEnum const enum_stroke_linejoin[] = {
194 {"miter", SP_STROKE_LINEJOIN_MITER},
195 {"round", SP_STROKE_LINEJOIN_ROUND},
196 {"bevel", SP_STROKE_LINEJOIN_BEVEL},
197 {NULL, -1}
198 };
200 static SPStyleEnum const enum_font_style[] = {
201 {"normal", SP_CSS_FONT_STYLE_NORMAL},
202 {"italic", SP_CSS_FONT_STYLE_ITALIC},
203 {"oblique", SP_CSS_FONT_STYLE_OBLIQUE},
204 {NULL, -1}
205 };
207 static SPStyleEnum const enum_font_size[] = {
208 {"xx-small", SP_CSS_FONT_SIZE_XX_SMALL},
209 {"x-small", SP_CSS_FONT_SIZE_X_SMALL},
210 {"small", SP_CSS_FONT_SIZE_SMALL},
211 {"medium", SP_CSS_FONT_SIZE_MEDIUM},
212 {"large", SP_CSS_FONT_SIZE_LARGE},
213 {"x-large", SP_CSS_FONT_SIZE_X_LARGE},
214 {"xx-large", SP_CSS_FONT_SIZE_XX_LARGE},
215 {"smaller", SP_CSS_FONT_SIZE_SMALLER},
216 {"larger", SP_CSS_FONT_SIZE_LARGER},
217 {NULL, -1}
218 };
220 static SPStyleEnum const enum_font_variant[] = {
221 {"normal", SP_CSS_FONT_VARIANT_NORMAL},
222 {"small-caps", SP_CSS_FONT_VARIANT_SMALL_CAPS},
223 {NULL, -1}
224 };
226 static SPStyleEnum const enum_font_weight[] = {
227 {"100", SP_CSS_FONT_WEIGHT_100},
228 {"200", SP_CSS_FONT_WEIGHT_200},
229 {"300", SP_CSS_FONT_WEIGHT_300},
230 {"400", SP_CSS_FONT_WEIGHT_400},
231 {"500", SP_CSS_FONT_WEIGHT_500},
232 {"600", SP_CSS_FONT_WEIGHT_600},
233 {"700", SP_CSS_FONT_WEIGHT_700},
234 {"800", SP_CSS_FONT_WEIGHT_800},
235 {"900", SP_CSS_FONT_WEIGHT_900},
236 {"normal", SP_CSS_FONT_WEIGHT_NORMAL},
237 {"bold", SP_CSS_FONT_WEIGHT_BOLD},
238 {"lighter", SP_CSS_FONT_WEIGHT_LIGHTER},
239 {"bolder", SP_CSS_FONT_WEIGHT_BOLDER},
240 {NULL, -1}
241 };
243 static SPStyleEnum const enum_font_stretch[] = {
244 {"ultra-condensed", SP_CSS_FONT_STRETCH_ULTRA_CONDENSED},
245 {"extra-condensed", SP_CSS_FONT_STRETCH_EXTRA_CONDENSED},
246 {"condensed", SP_CSS_FONT_STRETCH_CONDENSED},
247 {"semi-condensed", SP_CSS_FONT_STRETCH_SEMI_CONDENSED},
248 {"normal", SP_CSS_FONT_STRETCH_NORMAL},
249 {"semi-expanded", SP_CSS_FONT_STRETCH_SEMI_EXPANDED},
250 {"expanded", SP_CSS_FONT_STRETCH_EXPANDED},
251 {"extra-expanded", SP_CSS_FONT_STRETCH_EXTRA_EXPANDED},
252 {"ultra-expanded", SP_CSS_FONT_STRETCH_ULTRA_EXPANDED},
253 {"narrower", SP_CSS_FONT_STRETCH_NARROWER},
254 {"wider", SP_CSS_FONT_STRETCH_WIDER},
255 {NULL, -1}
256 };
258 static SPStyleEnum const enum_text_align[] = {
259 {"start", SP_CSS_TEXT_ALIGN_START},
260 {"end", SP_CSS_TEXT_ALIGN_END},
261 {"left", SP_CSS_TEXT_ALIGN_LEFT},
262 {"right", SP_CSS_TEXT_ALIGN_RIGHT},
263 {"center", SP_CSS_TEXT_ALIGN_CENTER},
264 {"justify", SP_CSS_TEXT_ALIGN_JUSTIFY},
265 {NULL, -1}
266 };
268 static SPStyleEnum const enum_text_transform[] = {
269 {"capitalize", SP_CSS_TEXT_TRANSFORM_CAPITALIZE},
270 {"uppercase", SP_CSS_TEXT_TRANSFORM_UPPERCASE},
271 {"lowercase", SP_CSS_TEXT_TRANSFORM_LOWERCASE},
272 {"none", SP_CSS_TEXT_TRANSFORM_NONE},
273 {NULL, -1}
274 };
276 static SPStyleEnum const enum_text_anchor[] = {
277 {"start", SP_CSS_TEXT_ANCHOR_START},
278 {"middle", SP_CSS_TEXT_ANCHOR_MIDDLE},
279 {"end", SP_CSS_TEXT_ANCHOR_END},
280 {NULL, -1}
281 };
283 static SPStyleEnum const enum_direction[] = {
284 {"ltr", SP_CSS_DIRECTION_LTR},
285 {"rtl", SP_CSS_DIRECTION_RTL},
286 {NULL, -1}
287 };
289 static SPStyleEnum const enum_block_progression[] = {
290 {"tb", SP_CSS_BLOCK_PROGRESSION_TB},
291 {"rl", SP_CSS_BLOCK_PROGRESSION_RL},
292 {"lr", SP_CSS_BLOCK_PROGRESSION_LR},
293 {NULL, -1}
294 };
296 static SPStyleEnum const enum_writing_mode[] = {
297 /* Note that using the same enumerator for lr as lr-tb means we write as lr-tb even if the
298 * input file said lr. We prefer writing lr-tb on the grounds that the spec says the initial
299 * value is lr-tb rather than lr.
300 *
301 * ECMA scripts may be surprised to find tb-rl in DOM if they set the attribute to rl, so
302 * sharing enumerators for different strings may be a bug (once we support ecma script).
303 */
304 {"lr-tb", SP_CSS_WRITING_MODE_LR_TB},
305 {"rl-tb", SP_CSS_WRITING_MODE_RL_TB},
306 {"tb-rl", SP_CSS_WRITING_MODE_TB_RL},
307 {"lr", SP_CSS_WRITING_MODE_LR_TB},
308 {"rl", SP_CSS_WRITING_MODE_RL_TB},
309 {"tb", SP_CSS_WRITING_MODE_TB_RL},
310 {NULL, -1}
311 };
313 static SPStyleEnum const enum_visibility[] = {
314 {"hidden", SP_CSS_VISIBILITY_HIDDEN},
315 {"collapse", SP_CSS_VISIBILITY_COLLAPSE},
316 {"visible", SP_CSS_VISIBILITY_VISIBLE},
317 {NULL, -1}
318 };
320 static SPStyleEnum const enum_overflow[] = {
321 {"visible", SP_CSS_OVERFLOW_VISIBLE},
322 {"hidden", SP_CSS_OVERFLOW_HIDDEN},
323 {"scroll", SP_CSS_OVERFLOW_SCROLL},
324 {"auto", SP_CSS_OVERFLOW_AUTO},
325 {NULL, -1}
326 };
328 static SPStyleEnum const enum_display[] = {
329 {"none", SP_CSS_DISPLAY_NONE},
330 {"inline", SP_CSS_DISPLAY_INLINE},
331 {"block", SP_CSS_DISPLAY_BLOCK},
332 {"list-item", SP_CSS_DISPLAY_LIST_ITEM},
333 {"run-in", SP_CSS_DISPLAY_RUN_IN},
334 {"compact", SP_CSS_DISPLAY_COMPACT},
335 {"marker", SP_CSS_DISPLAY_MARKER},
336 {"table", SP_CSS_DISPLAY_TABLE},
337 {"inline-table", SP_CSS_DISPLAY_INLINE_TABLE},
338 {"table-row-group", SP_CSS_DISPLAY_TABLE_ROW_GROUP},
339 {"table-header-group", SP_CSS_DISPLAY_TABLE_HEADER_GROUP},
340 {"table-footer-group", SP_CSS_DISPLAY_TABLE_FOOTER_GROUP},
341 {"table-row", SP_CSS_DISPLAY_TABLE_ROW},
342 {"table-column-group", SP_CSS_DISPLAY_TABLE_COLUMN_GROUP},
343 {"table-column", SP_CSS_DISPLAY_TABLE_COLUMN},
344 {"table-cell", SP_CSS_DISPLAY_TABLE_CELL},
345 {"table-caption", SP_CSS_DISPLAY_TABLE_CAPTION},
346 {NULL, -1}
347 };
349 static SPStyleEnum const enum_shape_rendering[] = {
350 {"auto", 0},
351 {"optimizeSpeed", 0},
352 {"crispEdges", 0},
353 {"geometricPrecision", 0},
354 {NULL, -1}
355 };
357 static SPStyleEnum const enum_color_rendering[] = {
358 {"auto", 0},
359 {"optimizeSpeed", 0},
360 {"optimizeQuality", 0},
361 {NULL, -1}
362 };
364 static SPStyleEnum const *const enum_image_rendering = enum_color_rendering;
366 static SPStyleEnum const enum_text_rendering[] = {
367 {"auto", 0},
368 {"optimizeSpeed", 0},
369 {"optimizeLegibility", 0},
370 {"geometricPrecision", 0},
371 {NULL, -1}
372 };
374 static SPStyleEnum const enum_enable_background[] = {
375 {"accumulate", SP_CSS_BACKGROUND_ACCUMULATE},
376 {"new", SP_CSS_BACKGROUND_NEW},
377 {NULL, -1}
378 };
380 /**
381 * Release callback.
382 */
383 static void
384 sp_style_object_release(SPObject *object, SPStyle *style)
385 {
386 style->object = NULL;
387 }
392 /**
393 * Returns a new SPStyle object with settings as per sp_style_clear().
394 */
395 SPStyle *
396 sp_style_new()
397 {
398 SPStyle *const style = g_new0(SPStyle, 1);
400 style->refcount = 1;
401 style->object = NULL;
402 style->text = sp_text_style_new();
403 style->text_private = TRUE;
405 sp_style_clear(style);
407 style->cloned = false;
409 style->fill_hreffed = false;
410 style->stroke_hreffed = false;
411 style->filter_hreffed = false;
413 new (&style->release_connection) sigc::connection();
415 new (&style->fill_release_connection) sigc::connection();
416 new (&style->fill_modified_connection) sigc::connection();
418 new (&style->stroke_release_connection) sigc::connection();
419 new (&style->stroke_modified_connection) sigc::connection();
421 new (&style->filter_release_connection) sigc::connection();
422 new (&style->filter_modified_connection) sigc::connection();
424 return style;
425 }
428 /**
429 * Creates a new SPStyle object, and attaches it to the specified SPObject.
430 */
431 SPStyle *
432 sp_style_new_from_object(SPObject *object)
433 {
434 g_return_val_if_fail(object != NULL, NULL);
435 g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
437 SPStyle *style = sp_style_new();
438 style->object = object;
439 style->release_connection = object->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_object_release), style));
441 if (object && SP_OBJECT_IS_CLONED(object)) {
442 style->cloned = true;
443 }
445 return style;
446 }
449 /**
450 * Increase refcount of style.
451 */
452 SPStyle *
453 sp_style_ref(SPStyle *style)
454 {
455 g_return_val_if_fail(style != NULL, NULL);
456 g_return_val_if_fail(style->refcount > 0, NULL);
458 style->refcount += 1;
460 return style;
461 }
464 /**
465 * Decrease refcount of style with possible destruction.
466 */
467 SPStyle *
468 sp_style_unref(SPStyle *style)
469 {
470 g_return_val_if_fail(style != NULL, NULL);
471 g_return_val_if_fail(style->refcount > 0, NULL);
473 style->refcount -= 1;
475 if (style->refcount < 1) {
476 style->release_connection.disconnect();
477 style->release_connection.~connection();
478 if (style->text) sp_text_style_unref(style->text);
479 sp_style_paint_clear(style, &style->fill);
480 sp_style_paint_clear(style, &style->stroke);
481 sp_style_filter_clear(style);
482 style->fill_release_connection.disconnect();
483 style->fill_release_connection.~connection();
484 style->fill_modified_connection.disconnect();
485 style->fill_modified_connection.~connection();
486 style->stroke_release_connection.disconnect();
487 style->stroke_release_connection.~connection();
488 style->stroke_modified_connection.disconnect();
489 style->stroke_modified_connection.~connection();
490 style->filter_modified_connection.disconnect();
491 style->filter_modified_connection.~connection();
492 style->filter_release_connection.disconnect();
493 style->filter_release_connection.~connection();
494 g_free(style->stroke_dash.dash);
495 g_free(style);
496 }
498 return NULL;
499 }
501 /**
502 * Reads the various style parameters for an object from repr.
503 */
504 static void
505 sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
506 {
507 g_assert(style != NULL);
508 g_assert(repr != NULL);
509 g_assert(!object || (SP_OBJECT_REPR(object) == repr));
511 sp_style_clear(style);
513 if (object && SP_OBJECT_IS_CLONED(object)) {
514 style->cloned = true;
515 }
517 /* 1. Style attribute */
518 gchar const *val = repr->attribute("style");
519 if (val != NULL) {
520 sp_style_merge_from_style_string(style, val);
521 }
523 if (object) {
524 sp_style_merge_from_object_stylesheet(style, object);
525 } else {
526 /** \todo No stylesheet information. Find out under what circumstances
527 * this occurs, and handle accordingly. (If we really wanted to, we
528 * could probably get stylesheets by going through repr->doc.)
529 */
530 }
532 /* 2. Presentation attributes */
533 /* CSS2 */
534 SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true);
535 SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true);
536 SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true);
537 /* Font */
538 SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size");
539 SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true);
540 SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true);
541 SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true);
542 SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true);
543 /* Text (css2 chapter 16) */
544 SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent");
545 SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true);
546 if (!style->text_decoration.set) {
547 val = repr->attribute("text-decoration");
548 if (val) {
549 sp_style_read_itextdecoration(&style->text_decoration, val);
550 }
551 }
552 if (!style->line_height.set) {
553 val = repr->attribute("line-height");
554 if (val) {
555 sp_style_read_ilengthornormal(&style->line_height, val);
556 }
557 }
558 if (!style->letter_spacing.set) {
559 val = repr->attribute("letter-spacing");
560 if (val) {
561 sp_style_read_ilengthornormal(&style->letter_spacing, val);
562 }
563 }
564 if (!style->word_spacing.set) {
565 val = repr->attribute("word-spacing");
566 if (val) {
567 sp_style_read_ilengthornormal(&style->word_spacing, val);
568 }
569 }
570 SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true);
571 SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true);
572 SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true);
574 /* SVG */
575 SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode",
576 enum_writing_mode, true);
577 SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor",
578 enum_text_anchor, true);
580 /* opacity */
581 if (!style->opacity.set) {
582 val = repr->attribute("opacity");
583 if (val) {
584 sp_style_read_iscale24(&style->opacity, val);
585 }
586 }
587 /* color */
588 if (!style->color.set) {
589 val = repr->attribute("color");
590 if (val) {
591 sp_style_read_icolor(&style->color, val, style, ( object
592 ? SP_OBJECT_DOCUMENT(object)
593 : NULL ));
594 }
595 }
596 /* fill */
597 if (!style->fill.set) {
598 val = repr->attribute("fill");
599 if (val) {
600 sp_style_read_ipaint(&style->fill, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
601 }
602 }
603 /* fill-opacity */
604 if (!style->fill_opacity.set) {
605 val = repr->attribute("fill-opacity");
606 if (val) {
607 sp_style_read_iscale24(&style->fill_opacity, val);
608 }
609 }
610 /* fill-rule */
611 SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true);
612 /* stroke */
613 if (!style->stroke.set) {
614 val = repr->attribute("stroke");
615 if (val) {
616 sp_style_read_ipaint(&style->stroke, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
617 }
618 }
619 SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width");
620 SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true);
621 SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true);
622 SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit");
624 /* markers */
625 if (!style->marker[SP_MARKER_LOC].set) {
626 val = repr->attribute("marker");
627 if (val) {
628 sp_style_read_istring(&style->marker[SP_MARKER_LOC], val);
629 }
630 }
631 if (!style->marker[SP_MARKER_LOC_START].set) {
632 val = repr->attribute("marker-start");
633 if (val) {
634 sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val);
635 }
636 }
637 if (!style->marker[SP_MARKER_LOC_MID].set) {
638 val = repr->attribute("marker-mid");
639 if (val) {
640 sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val);
641 }
642 }
643 if (!style->marker[SP_MARKER_LOC_END].set) {
644 val = repr->attribute("marker-end");
645 if (val) {
646 sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val);
647 }
648 }
650 /* stroke-opacity */
651 if (!style->stroke_opacity.set) {
652 val = repr->attribute("stroke-opacity");
653 if (val) {
654 sp_style_read_iscale24(&style->stroke_opacity, val);
655 }
656 }
657 if (!style->stroke_dasharray_set) {
658 val = repr->attribute("stroke-dasharray");
659 if (val) {
660 sp_style_read_dash(style, val);
661 }
662 }
663 if (!style->stroke_dashoffset_set) {
664 /* fixme */
665 val = repr->attribute("stroke-dashoffset");
666 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
667 style->stroke_dashoffset_set = TRUE;
668 } else {
669 style->stroke_dashoffset_set = FALSE;
670 }
671 }
673 /* font-family */
674 if (!style->text_private || !style->text->font_family.set) {
675 val = repr->attribute("font-family");
676 if (val) {
677 if (!style->text_private) sp_style_privatize_text(style);
678 gchar *val_unquoted = attribute_unquote(val);
679 sp_style_read_istring(&style->text->font_family, val_unquoted);
680 if (val_unquoted) g_free (val_unquoted);
681 }
682 }
684 /* filter effects */
685 if (!style->filter.set) {
686 val = repr->attribute("filter");
687 if (val) {
688 sp_style_read_ifilter(val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
689 }
690 }
691 SPS_READ_PENUM_IF_UNSET(&style->enable_background, repr,
692 "enable-background", enum_enable_background, true);
694 /* 3. Merge from parent */
695 if (object) {
696 if (object->parent) {
697 sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent));
698 }
699 } else {
700 if (sp_repr_parent(repr)) {
701 /// \todo fixme: This is not the prettiest thing (Lauris)
702 SPStyle *parent = sp_style_new();
703 sp_style_read(parent, NULL, sp_repr_parent(repr));
704 sp_style_merge_from_parent(style, parent);
705 sp_style_unref(parent);
706 }
707 }
708 }
711 /**
712 * Read style properties from object's repr.
713 *
714 * 1. Reset existing object style
715 * 2. Load current effective object style
716 * 3. Load i attributes from immediate parent (which has to be up-to-date)
717 */
718 void
719 sp_style_read_from_object(SPStyle *style, SPObject *object)
720 {
721 g_return_if_fail(style != NULL);
722 g_return_if_fail(object != NULL);
723 g_return_if_fail(SP_IS_OBJECT(object));
725 Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
726 g_return_if_fail(repr != NULL);
728 sp_style_read(style, object, repr);
729 }
732 /**
733 * Read style properties from repr only.
734 */
735 void
736 sp_style_read_from_repr(SPStyle *style, Inkscape::XML::Node *repr)
737 {
738 g_return_if_fail(style != NULL);
739 g_return_if_fail(repr != NULL);
741 sp_style_read(style, NULL, repr);
742 }
746 /**
747 *
748 */
749 static void
750 sp_style_privatize_text(SPStyle *style)
751 {
752 SPTextStyle *text = style->text;
753 style->text = sp_text_style_duplicate_unset(style->text);
754 sp_text_style_unref(text);
755 style->text_private = TRUE;
756 }
759 /**
760 * Merge property into style.
761 *
762 * Should be called in order of highest to lowest precedence.
763 * E.g. for a single style string, call from the last declaration to the first,
764 * as CSS says that later declarations override earlier ones.
765 *
766 * \pre val != NULL.
767 */
768 static void
769 sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
770 {
771 g_return_if_fail(val != NULL);
773 switch (id) {
774 /* CSS2 */
775 /* Font */
776 case SP_PROP_FONT_FAMILY:
777 if (!style->text_private) sp_style_privatize_text(style);
778 if (!style->text->font_family.set) {
779 gchar *val_unquoted = attribute_unquote(val);
780 sp_style_read_istring(&style->text->font_family, val_unquoted);
781 if (val_unquoted) g_free (val_unquoted);
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 // read the decls from end to start, using head recursion, so that latter declarations override
1132 // (Ref: http://www.w3.org/TR/REC-CSS2/cascade.html#cascading-order point 4.)
1133 // because sp_style_merge_style_from_decl only sets properties that are unset
1134 if (decl_list->next) {
1135 sp_style_merge_from_decl_list(style, decl_list->next);
1136 }
1137 sp_style_merge_style_from_decl(style, decl_list);
1138 }
1140 static CRSelEng *
1141 sp_repr_sel_eng()
1142 {
1143 CRSelEng *const ret = cr_sel_eng_new();
1144 cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface);
1146 /** \todo
1147 * Check whether we need to register any pseudo-class handlers.
1148 * libcroco has its own default handlers for first-child and lang.
1149 *
1150 * We probably want handlers for link and arguably visited (though
1151 * inkscape can't visit links at the time of writing). hover etc.
1152 * more useful in inkview than the editor inkscape.
1153 *
1154 * http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that
1155 * the following should be honoured, at least by inkview:
1156 * :hover, :active, :focus, :visited, :link.
1157 */
1159 g_assert(ret);
1160 return ret;
1161 }
1163 static void
1164 sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object)
1165 {
1166 static CRSelEng *sel_eng = NULL;
1167 if (!sel_eng) {
1168 sel_eng = sp_repr_sel_eng();
1169 }
1171 CRPropList *props = NULL;
1172 CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng,
1173 object->document->style_cascade,
1174 object->repr,
1175 &props);
1176 g_return_if_fail(status == CR_OK);
1177 /// \todo Check what errors can occur, and handle them properly.
1178 if (props) {
1179 sp_style_merge_from_props(style, props);
1180 cr_prop_list_destroy(props);
1181 }
1182 }
1184 /**
1185 * Parses a style="..." string and merges it with an existing SPStyle.
1186 */
1187 void
1188 sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p)
1189 {
1190 /*
1191 * Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute:
1192 * ``When CSS styling is used, CSS inline style is specified by including
1193 * semicolon-separated property declarations of the form "name : value"
1194 * within the style attribute''.
1195 *
1196 * That's fairly ambiguous. Is a `value' allowed to contain semicolons?
1197 * Why does it say "including", what else is allowed in the style
1198 * attribute value?
1199 */
1201 CRDeclaration *const decl_list
1202 = cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8);
1203 if (decl_list) {
1204 sp_style_merge_from_decl_list(style, decl_list);
1205 cr_declaration_destroy(decl_list);
1206 }
1207 }
1209 /** Indexed by SP_CSS_FONT_SIZE_blah. */
1210 static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0};
1212 static void
1213 sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent)
1214 {
1215 /* 'font-size' */
1216 if (!child.set || child.inherit) {
1217 /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
1218 child.computed = parent.computed;
1219 } else if (child.type == SP_FONT_SIZE_LITERAL) {
1220 /** \todo
1221 * fixme: SVG and CSS do not specify clearly, whether we should use
1222 * user or screen coordinates (Lauris)
1223 */
1224 if (child.value < SP_CSS_FONT_SIZE_SMALLER) {
1225 child.computed = font_size_table[child.value];
1226 } else if (child.value == SP_CSS_FONT_SIZE_SMALLER) {
1227 child.computed = parent.computed / 1.2;
1228 } else if (child.value == SP_CSS_FONT_SIZE_LARGER) {
1229 child.computed = parent.computed * 1.2;
1230 } else {
1231 /* Illegal value */
1232 }
1233 } else if (child.type == SP_FONT_SIZE_PERCENTAGE) {
1234 /* Unlike most other lengths, percentage for font size is relative to parent computed value
1235 * rather than viewport. */
1236 child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value);
1237 }
1238 }
1240 /**
1241 * Sets computed values in \a style, which may involve inheriting from (or in some other way
1242 * calculating from) corresponding computed values of \a parent.
1243 *
1244 * References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default.
1245 * http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to
1246 * inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise
1247 * about what the computed value is (not obvious for lengths).
1248 *
1249 * \pre \a parent's computed values are already up-to-date.
1250 */
1251 void
1252 sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent)
1253 {
1254 g_return_if_fail(style != NULL);
1256 /** \todo
1257 * fixme: Check for existing callers that might pass null parent.
1258 * This should probably be g_return_if_fail, or else we should make a
1259 * best attempt to set computed values correctly without having a parent
1260 * (i.e., by assuming parent has initial values).
1261 */
1262 if (!parent)
1263 return;
1265 /* CSS2 */
1266 /* Font */
1267 sp_style_merge_font_size_from_parent(style->font_size, parent->font_size);
1269 /* 'font-style' */
1270 if (!style->font_style.set || style->font_style.inherit) {
1271 style->font_style.computed = parent->font_style.computed;
1272 }
1274 /* 'font-variant' */
1275 if (!style->font_variant.set || style->font_variant.inherit) {
1276 style->font_variant.computed = parent->font_variant.computed;
1277 }
1279 /* 'font-weight' */
1280 if (!style->font_weight.set || style->font_weight.inherit) {
1281 style->font_weight.computed = parent->font_weight.computed;
1282 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) {
1283 /** \todo
1284 * fixme: This is unconditional, i.e., happens even if parent not
1285 * present.
1286 */
1287 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
1288 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) {
1289 style->font_weight.computed = SP_CSS_FONT_WEIGHT_700;
1290 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) {
1291 unsigned const parent_val = parent->font_weight.computed;
1292 g_assert(SP_CSS_FONT_WEIGHT_100 == 0);
1293 // strictly, 'bolder' and 'lighter' should go to the next weight
1294 // expressible in the current font family, but that's difficult to
1295 // find out, so jumping by 3 seems an appropriate approximation
1296 style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3
1297 ? (unsigned)SP_CSS_FONT_WEIGHT_100
1298 : parent_val - 3);
1299 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1300 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) {
1301 unsigned const parent_val = parent->font_weight.computed;
1302 g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900);
1303 style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3
1304 ? (unsigned)SP_CSS_FONT_WEIGHT_900
1305 : parent_val + 3);
1306 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1307 }
1309 /* 'font-stretch' */
1310 if (!style->font_stretch.set || style->font_stretch.inherit) {
1311 style->font_stretch.computed = parent->font_stretch.computed;
1312 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) {
1313 unsigned const parent_val = parent->font_stretch.computed;
1314 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED
1315 ? parent_val
1316 : parent_val - 1);
1317 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1318 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) {
1319 unsigned const parent_val = parent->font_stretch.computed;
1320 g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1321 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED
1322 ? parent_val
1323 : parent_val + 1);
1324 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1325 }
1327 /* text (css2) */
1328 if (!style->text_indent.set || style->text_indent.inherit) {
1329 style->text_indent.computed = parent->text_indent.computed;
1330 }
1332 if (!style->text_align.set || style->text_align.inherit) {
1333 style->text_align.computed = parent->text_align.computed;
1334 }
1336 if (!style->text_decoration.set || style->text_decoration.inherit) {
1337 style->text_decoration.underline = parent->text_decoration.underline;
1338 style->text_decoration.overline = parent->text_decoration.overline;
1339 style->text_decoration.line_through = parent->text_decoration.line_through;
1340 style->text_decoration.blink = parent->text_decoration.blink;
1341 }
1343 if (!style->line_height.set || style->line_height.inherit) {
1344 style->line_height.computed = parent->line_height.computed;
1345 style->line_height.normal = parent->line_height.normal;
1346 }
1348 if (!style->letter_spacing.set || style->letter_spacing.inherit) {
1349 style->letter_spacing.computed = parent->letter_spacing.computed;
1350 style->letter_spacing.normal = parent->letter_spacing.normal;
1351 }
1353 if (!style->word_spacing.set || style->word_spacing.inherit) {
1354 style->word_spacing.computed = parent->word_spacing.computed;
1355 style->word_spacing.normal = parent->word_spacing.normal;
1356 }
1358 if (!style->text_transform.set || style->text_transform.inherit) {
1359 style->text_transform.computed = parent->text_transform.computed;
1360 }
1362 if (!style->direction.set || style->direction.inherit) {
1363 style->direction.computed = parent->direction.computed;
1364 }
1366 if (!style->block_progression.set || style->block_progression.inherit) {
1367 style->block_progression.computed = parent->block_progression.computed;
1368 }
1370 if (!style->writing_mode.set || style->writing_mode.inherit) {
1371 style->writing_mode.computed = parent->writing_mode.computed;
1372 }
1374 if (!style->text_anchor.set || style->text_anchor.inherit) {
1375 style->text_anchor.computed = parent->text_anchor.computed;
1376 }
1378 if (style->opacity.inherit) {
1379 style->opacity.value = parent->opacity.value;
1380 }
1382 /* Color */
1383 if (!style->color.set || style->color.inherit) {
1384 sp_style_merge_ipaint(style, &style->color, &parent->color);
1385 }
1387 /* Fill */
1388 if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) {
1389 sp_style_merge_ipaint(style, &style->fill, &parent->fill);
1390 }
1392 if (!style->fill_opacity.set || style->fill_opacity.inherit) {
1393 style->fill_opacity.value = parent->fill_opacity.value;
1394 }
1396 if (!style->fill_rule.set || style->fill_rule.inherit) {
1397 style->fill_rule.computed = parent->fill_rule.computed;
1398 }
1400 /* Stroke */
1401 if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) {
1402 sp_style_merge_ipaint(style, &style->stroke, &parent->stroke);
1403 }
1405 if (!style->stroke_width.set || style->stroke_width.inherit) {
1406 style->stroke_width.computed = parent->stroke_width.computed;
1407 } else {
1408 /* Update computed value for any change in font inherited from parent. */
1409 double const em = style->font_size.computed;
1410 if (style->stroke_width.unit == SP_CSS_UNIT_EM) {
1411 style->stroke_width.computed = style->stroke_width.value * em;
1412 } else if (style->stroke_width.unit == SP_CSS_UNIT_EX) {
1413 double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango.
1414 style->stroke_width.computed = style->stroke_width.value * ex;
1415 }
1416 }
1418 if (!style->stroke_linecap.set || style->stroke_linecap.inherit) {
1419 style->stroke_linecap.computed = parent->stroke_linecap.computed;
1420 }
1422 if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) {
1423 style->stroke_linejoin.computed = parent->stroke_linejoin.computed;
1424 }
1426 if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) {
1427 style->stroke_miterlimit.value = parent->stroke_miterlimit.value;
1428 }
1430 if (!style->stroke_dasharray_set && parent->stroke_dasharray_set) {
1431 /** \todo
1432 * This code looks wrong. Why does the logic differ from the
1433 * above properties? Similarly dashoffset below.
1434 */
1435 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1436 if (style->stroke_dash.n_dash > 0) {
1437 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1438 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1439 }
1440 }
1442 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1443 style->stroke_dash.offset = parent->stroke_dash.offset;
1444 }
1446 if (!style->stroke_opacity.set || style->stroke_opacity.inherit) {
1447 style->stroke_opacity.value = parent->stroke_opacity.value;
1448 }
1450 if (style->text && parent->text) {
1451 if (!style->text->font_family.set || style->text->font_family.inherit) {
1452 g_free(style->text->font_family.value);
1453 style->text->font_family.value = g_strdup(parent->text->font_family.value);
1454 }
1455 }
1457 /* Markers - Free the old value and make copy of the new */
1458 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1459 if (!style->marker[i].set || style->marker[i].inherit) {
1460 g_free(style->marker[i].value);
1461 style->marker[i].value = g_strdup(parent->marker[i].value);
1462 }
1463 }
1465 /* Filter effects */
1466 if (style->filter.inherit) {
1467 sp_style_merge_ifilter(style, &parent->filter);
1468 }
1470 if(style->enable_background.inherit) {
1471 style->enable_background.value = parent->enable_background.value;
1472 }
1473 }
1475 template <typename T>
1476 static void
1477 sp_style_merge_prop_from_dying_parent(T &child, T const &parent)
1478 {
1479 if ( ( !(child.set) || child.inherit )
1480 && parent.set && !(parent.inherit) )
1481 {
1482 child = parent;
1483 }
1484 }
1486 /**
1487 * Copy SPIString from parent to child.
1488 */
1489 static void
1490 sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent)
1491 {
1492 if ( ( !(child.set) || child.inherit )
1493 && parent.set && !(parent.inherit) )
1494 {
1495 g_free(child.value);
1496 child.value = g_strdup(parent.value);
1497 child.set = parent.set;
1498 child.inherit = parent.inherit;
1499 }
1500 }
1502 static void
1503 sp_style_merge_paint_prop_from_dying_parent(SPStyle *style,
1504 SPIPaint &child, SPIPaint const &parent)
1505 {
1506 /** \todo
1507 * I haven't given this much attention. See comments below about
1508 * currentColor, colorProfile, and relative URIs.
1509 */
1510 if (!child.set || child.inherit || child.currentcolor) {
1511 sp_style_merge_ipaint(style, &child, &parent);
1512 child.set = parent.set;
1513 child.inherit = parent.inherit;
1514 }
1515 }
1517 static void
1518 sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent,
1519 unsigned const max_computed_val,
1520 unsigned const smaller_val)
1521 {
1522 /* We assume that min computed val is 0, contiguous up to max_computed_val,
1523 then zero or more other absolute values, then smaller_val then larger_val. */
1524 unsigned const min_computed_val = 0;
1525 unsigned const larger_val = smaller_val + 1;
1526 g_return_if_fail(min_computed_val < max_computed_val);
1527 g_return_if_fail(max_computed_val < smaller_val);
1529 if (parent.set && !parent.inherit) {
1530 if (!child.set || child.inherit) {
1531 child.value = parent.value;
1532 child.set = parent.set; // i.e. true
1533 child.inherit = parent.inherit; // i.e. false
1534 } else if (child.value < smaller_val) {
1535 /* Child has absolute value: leave as is. */
1536 } else if ( ( child.value == smaller_val
1537 && parent.value == larger_val )
1538 || ( parent.value == smaller_val
1539 && child.value == larger_val ) )
1540 {
1541 child.set = false;
1542 /*
1543 * Note that this can result in a change in computed value in the
1544 * rare case that the parent's setting was a no-op (i.e. if the
1545 * parent's parent's computed value was already ultra-condensed or
1546 * ultra-expanded). However, I'd guess that the change is for the
1547 * better: I'd guess that if the properties were specified
1548 * relatively, then the intent is to counteract parent's effect.
1549 * I.e. I believe this is the best code even in that case.
1550 */
1551 } else if (child.value == parent.value) {
1552 /* Leave as is. */
1553 /** \todo
1554 * It's unclear what to do if style and parent specify the same
1555 * relative directive (narrower or wider). We can either convert
1556 * to absolute specification or coalesce to a single relative
1557 * request (of half the strength of the original pair).
1558 *
1559 * Converting to a single level of relative specification is a
1560 * better choice if the newly-unlinked clone is itself cloned to
1561 * other contexts (inheriting different font stretchiness): it
1562 * would preserve the effect that it will be narrower than
1563 * the inherited context in each case. The disadvantage is that
1564 * it will ~certainly affect the computed value of the
1565 * newly-unlinked clone.
1566 */
1567 } else {
1568 unsigned const parent_val = parent.computed;
1569 child.value = ( child.value == smaller_val
1570 ? ( parent_val == min_computed_val
1571 ? parent_val
1572 : parent_val - 1 )
1573 : ( parent_val == max_computed_val
1574 ? parent_val
1575 : parent_val + 1 ) );
1576 g_assert(child.value <= max_computed_val);
1577 child.inherit = false;
1578 g_assert(child.set);
1579 }
1580 }
1581 }
1583 template <typename LengthT>
1584 static void
1585 sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent,
1586 double const parent_child_em_ratio)
1587 {
1588 if ( ( !(child.set) || child.inherit )
1589 && parent.set && !(parent.inherit) )
1590 {
1591 child = parent;
1592 switch (parent.unit) {
1593 case SP_CSS_UNIT_EM:
1594 case SP_CSS_UNIT_EX:
1595 child.value *= parent_child_em_ratio;
1596 /** \todo
1597 * fixme: Have separate ex ratio parameter.
1598 * Get x height from libnrtype or pango.
1599 */
1600 if (!isFinite(child.value)) {
1601 child.value = child.computed;
1602 child.unit = SP_CSS_UNIT_NONE;
1603 }
1604 break;
1606 default:
1607 break;
1608 }
1609 }
1610 }
1612 static double
1613 get_relative_font_size_frac(SPIFontSize const &font_size)
1614 {
1615 switch (font_size.type) {
1616 case SP_FONT_SIZE_LITERAL: {
1617 switch (font_size.value) {
1618 case SP_CSS_FONT_SIZE_SMALLER:
1619 return 5.0 / 6.0;
1621 case SP_CSS_FONT_SIZE_LARGER:
1622 return 6.0 / 5.0;
1624 default:
1625 g_assert_not_reached();
1626 }
1627 }
1629 case SP_FONT_SIZE_PERCENTAGE:
1630 return SP_F8_16_TO_FLOAT(font_size.value);
1632 case SP_FONT_SIZE_LENGTH:
1633 g_assert_not_reached();
1634 }
1635 g_assert_not_reached();
1636 }
1638 /**
1639 * Combine \a style and \a parent style specifications into a single style specification that
1640 * preserves (as much as possible) the effect of the existing \a style being a child of \a parent.
1641 *
1642 * Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being
1643 * unlinked), in which case we copy/adapt property values that are explicitly set in \a parent,
1644 * trying to retain the same visual appearance once the parent is removed. Interesting cases are
1645 * when there is unusual interaction with the parent's value (opacity, display) or when the value
1646 * can be specified as relative to the parent computed value (font-size, font-weight etc.).
1647 *
1648 * Doesn't update computed values of \a style. For correctness, you should subsequently call
1649 * sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a
1650 * style was previously up-to-date wrt \a parent.
1651 *
1652 * \pre \a parent's computed values are already up-to-date.
1653 * (\a style's computed values needn't be up-to-date.)
1654 */
1655 void
1656 sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent)
1657 {
1658 /** \note
1659 * The general rule for each property is as follows:
1660 *
1661 * If style is set to an absolute value, then leave it as is.
1662 *
1663 * Otherwise (i.e. if style has a relative value):
1664 *
1665 * If parent is set to an absolute value, then set style to the computed value.
1666 *
1667 * Otherwise, calculate the combined relative value (e.g. multiplying the two percentages).
1668 */
1670 /* We do font-size first, to ensure that em size is up-to-date. */
1671 /** \todo
1672 * fixme: We'll need to have more font-related things up the top once
1673 * we're getting x-height from pango or libnrtype.
1674 */
1676 /* Some things that allow relative specifications. */
1677 {
1678 /* font-size. Note that we update the computed font-size of style,
1679 to assist in em calculations later in this function. */
1680 if (parent->font_size.set && !parent->font_size.inherit) {
1681 if (!style->font_size.set || style->font_size.inherit) {
1682 /* font_size inherits the computed value, so we can use the parent value
1683 * verbatim. */
1684 style->font_size = parent->font_size;
1685 } else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) {
1686 /* Child already has absolute size (stored in computed value), so do nothing. */
1687 } else if ( style->font_size.type == SP_FONT_SIZE_LITERAL
1688 && style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) {
1689 /* Child already has absolute size, but we ensure that the computed value
1690 is up-to-date. */
1691 unsigned const ix = style->font_size.value;
1692 g_assert(ix < G_N_ELEMENTS(font_size_table));
1693 style->font_size.computed = font_size_table[ix];
1694 } else {
1695 /* Child has relative size. */
1696 double const child_frac(get_relative_font_size_frac(style->font_size));
1697 style->font_size.set = true;
1698 style->font_size.inherit = false;
1699 style->font_size.computed = parent->font_size.computed * child_frac;
1701 if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL
1702 && parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER )
1703 || parent->font_size.type == SP_FONT_SIZE_LENGTH )
1704 {
1705 /* Absolute value. */
1706 style->font_size.type = SP_FONT_SIZE_LENGTH;
1707 /* .value is unused for SP_FONT_SIZE_LENGTH. */
1708 } else {
1709 /* Relative value. */
1710 double const parent_frac(get_relative_font_size_frac(parent->font_size));
1711 style->font_size.type = SP_FONT_SIZE_PERCENTAGE;
1712 style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac);
1713 }
1714 }
1715 }
1717 /* 'font-stretch' */
1718 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch,
1719 parent->font_stretch,
1720 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
1721 SP_CSS_FONT_STRETCH_NARROWER);
1723 /* font-weight */
1724 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight,
1725 parent->font_weight,
1726 SP_CSS_FONT_WEIGHT_900,
1727 SP_CSS_FONT_WEIGHT_LIGHTER);
1728 }
1731 /* Enum values that don't have any relative settings (other than `inherit'). */
1732 {
1733 SPIEnum SPStyle::*const fields[] = {
1734 //nyi: SPStyle::clip_rule,
1735 //nyi: SPStyle::color_interpolation,
1736 //nyi: SPStyle::color_interpolation_filters,
1737 //nyi: SPStyle::color_rendering,
1738 &SPStyle::direction,
1739 &SPStyle::fill_rule,
1740 &SPStyle::font_style,
1741 &SPStyle::font_variant,
1742 //nyi: SPStyle::image_rendering,
1743 //nyi: SPStyle::pointer_events,
1744 //nyi: SPStyle::shape_rendering,
1745 &SPStyle::stroke_linecap,
1746 &SPStyle::stroke_linejoin,
1747 &SPStyle::text_anchor,
1748 //nyi: &SPStyle::text_rendering,
1749 &SPStyle::visibility,
1750 &SPStyle::writing_mode
1751 };
1753 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1754 SPIEnum SPStyle::*const fld = fields[i];
1755 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld);
1756 }
1757 }
1759 /* A few other simple inheritance properties. */
1760 {
1761 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity);
1762 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity);
1763 sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit);
1765 /** \todo
1766 * We currently treat text-decoration as if it were a simple inherited
1767 * property (fixme). This code may need changing once we do the
1768 * special fill/stroke inheritance mentioned by the spec.
1769 */
1770 sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration,
1771 parent->text_decoration);
1773 //nyi: font-size-adjust, // <number> | none | inherit
1774 //nyi: glyph-orientation-horizontal,
1775 //nyi: glyph-orientation-vertical,
1776 }
1778 /* Properties that involve length but are easy in other respects. */
1779 {
1780 /* The difficulty with lengths is that font-relative units need adjusting if the font
1781 * varies between parent & child.
1782 *
1783 * Lengths specified in the existing child can stay as they are: its computed font
1784 * specification should stay unchanged, so em & ex lengths should continue to mean the same
1785 * size.
1786 *
1787 * Lengths specified in the dying parent in em or ex need to be scaled according to the
1788 * ratio of em or ex size between parent & child.
1789 */
1790 double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed;
1792 SPILength SPStyle::*const lfields[] = {
1793 &SPStyle::stroke_width,
1794 &SPStyle::text_indent
1795 };
1796 for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) {
1797 SPILength SPStyle::*fld = lfields[i];
1798 sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld,
1799 parent->*fld,
1800 parent_child_em_ratio);
1801 }
1803 SPILengthOrNormal SPStyle::*const nfields[] = {
1804 &SPStyle::letter_spacing,
1805 &SPStyle::line_height,
1806 &SPStyle::word_spacing
1807 };
1808 for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) {
1809 SPILengthOrNormal SPStyle::*fld = nfields[i];
1810 sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld,
1811 parent->*fld,
1812 parent_child_em_ratio);
1813 }
1815 //nyi: &SPStyle::kerning: length or `auto'
1817 /* fixme: Move stroke-dash and stroke-dash-offset here once they
1818 can accept units. */
1819 }
1821 /* Properties that involve a URI but are easy in other respects. */
1822 {
1823 /** \todo
1824 * Could cause problems if original object was in another document
1825 * and it used a relative URL. (At the time of writing, we don't
1826 * allow hrefs to other documents, so this isn't a problem yet.)
1827 * Paint properties also allow URIs.
1828 */
1829 //nyi: cursor, // may involve change in effect, but we can't do much better
1830 //nyi: color-profile,
1832 // Markers (marker-start, marker-mid, marker-end).
1833 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1834 sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]);
1835 }
1836 }
1838 /* CSS2 */
1839 /* Font */
1841 if (style->text && parent->text) {
1842 sp_style_merge_string_prop_from_dying_parent(style->text->font_family,
1843 parent->text->font_family);
1844 }
1846 /* Properties that don't inherit by default. Most of these need special handling. */
1847 {
1848 /*
1849 * opacity's effect is cumulative; we set the new value to the combined effect. The
1850 * default value for opacity is 1.0, not inherit. (Note that stroke-opacity and
1851 * fill-opacity are quite different from opacity, and don't need any special handling.)
1852 *
1853 * Cases:
1854 * - parent & child were each previously unset, in which case the effective
1855 * opacity value is 1.0, and style should remain unset.
1856 * - parent was previously unset (so computed opacity value of 1.0)
1857 * and child was set to inherit. The merged child should
1858 * get a value of 1.0, and shouldn't inherit (lest the new parent
1859 * has a different opacity value). Given that opacity's default
1860 * value is 1.0 (rather than inherit), we might as well have the
1861 * merged child's opacity be unset.
1862 * - parent was previously unset (so opacity 1.0), and child was set to a number.
1863 * The merged child should retain its existing settings (though it doesn't matter
1864 * if we make it unset if that number was 1.0).
1865 * - parent was inherit and child was unset. Merged child should be set to inherit.
1866 * - parent was inherit and child was inherit. (We can't in general reproduce this
1867 * effect (short of introducing a new group), but setting opacity to inherit is rare.)
1868 * If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged
1869 * child's value should be set to the product of the two, i.e. the square of the
1870 * inherited value, and should not be marked as inherit. (This decision assumes that it
1871 * is more important to retain the effective opacity than to retain the inheriting
1872 * effect, and assumes that the inheriting effect either isn't important enough to create
1873 * a group or isn't common enough to bother maintaining the code to create a group.) If
1874 * the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes
1875 * closer to maintaining the effect.
1876 * - parent was inherit and child was set to a numerical value. If the child's value
1877 * was 1.0, then the merged child should have the same settings as the parent.
1878 * If the child's value was 0, then the merged child should also be set to 0.
1879 * If the child's value was anything else, then we do the same as for the inherit/inherit
1880 * case above: have the merged child set to the product of the two opacities and not
1881 * marked as inherit, for the same reasons as for that case.
1882 * - parent was set to a value, and child was unset. The merged child should have
1883 * parent's settings.
1884 * - parent was set to a value, and child was inherit. The merged child should
1885 * be set to the product, i.e. the square of the parent's value.
1886 * - parent & child are each set to a value. The merged child should be set to the
1887 * product.
1888 */
1889 if ( !style->opacity.set
1890 || ( !style->opacity.inherit
1891 && style->opacity.value == SP_SCALE24_MAX ) )
1892 {
1893 style->opacity = parent->opacity;
1894 } else {
1895 /* Ensure that style's computed value is up-to-date. */
1896 if (style->opacity.inherit) {
1897 style->opacity.value = parent->opacity.value;
1898 }
1900 /* Multiplication of opacities occurs even if a child's opacity is set to inherit. */
1901 style->opacity.value = SP_SCALE24_MUL(style->opacity.value,
1902 parent->opacity.value);
1904 style->opacity.inherit = (parent->opacity.inherit
1905 && style->opacity.inherit
1906 && (parent->opacity.value == 0 ||
1907 parent->opacity.value == SP_SCALE24_MAX));
1908 style->opacity.set = ( style->opacity.inherit
1909 || style->opacity.value < SP_SCALE24_MAX );
1910 }
1912 /* display is in principle similar to opacity, but implementation is easier. */
1913 if ( parent->display.set && !parent->display.inherit
1914 && parent->display.value == SP_CSS_DISPLAY_NONE ) {
1915 style->display.value = SP_CSS_DISPLAY_NONE;
1916 style->display.set = true;
1917 style->display.inherit = false;
1918 } else if (style->display.inherit) {
1919 style->display.value = parent->display.value;
1920 style->display.set = parent->display.set;
1921 style->display.inherit = parent->display.inherit;
1922 } else {
1923 /* Leave as is. (display doesn't inherit by default.) */
1924 }
1926 /* enable-background - this is rather complicated, because
1927 * it is valid only when applied to container elements.
1928 * Let's check a simple case anyhow. */
1929 if (parent->enable_background.set
1930 && !parent->enable_background.inherit
1931 && style->enable_background.inherit)
1932 {
1933 style->enable_background.set = true;
1934 style->enable_background.inherit = false;
1935 style->enable_background.value = parent->enable_background.value;
1936 }
1938 if (!style->filter.set || style->filter.inherit)
1939 {
1940 // FIXME:
1941 // instead of just copying over, we need to _really merge_ the two filters by combining their
1942 // filter primitives
1943 sp_style_merge_ifilter(style, &parent->filter);
1944 }
1946 /** \todo
1947 * fixme: Check that we correctly handle all properties that don't
1948 * inherit by default (as shown in
1949 * http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties).
1950 */
1951 }
1953 /* SPIPaint properties (including color). */
1954 {
1955 /** \todo
1956 * Think about the issues involved if specified as currentColor or
1957 * if specified relative to colorProfile, and if the currentColor or
1958 * colorProfile differs between parent \& child. See also comments
1959 * elsewhere in this function about URIs.
1960 */
1961 SPIPaint SPStyle::*const fields[] = {
1962 &SPStyle::color,
1963 &SPStyle::fill,
1964 &SPStyle::stroke
1965 };
1966 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1967 SPIPaint SPStyle::*const fld = fields[i];
1968 sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld);
1969 }
1970 }
1972 /* Things from SVG 1.2 or CSS3. */
1973 {
1974 /* Note: If we ever support setting string values for text-align then we'd need strdup
1975 * handling here. */
1976 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align);
1978 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform);
1979 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression);
1980 }
1982 /* Note: this will need length handling once dasharray supports units. */
1983 if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit )
1984 && parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit )
1985 {
1986 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1987 if (style->stroke_dash.n_dash > 0) {
1988 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1989 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1990 }
1991 style->stroke_dasharray_set = parent->stroke_dasharray_set;
1992 style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit;
1993 }
1995 /* Note: this will need length handling once dasharray_offset supports units. */
1996 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1997 style->stroke_dash.offset = parent->stroke_dash.offset;
1998 style->stroke_dashoffset_set = parent->stroke_dashoffset_set;
1999 /* fixme: we don't currently allow stroke-dashoffset to be `inherit'. TODO: Try to
2000 * represent it as a normal SPILength; though will need to do something about existing
2001 * users of stroke_dash.offset and stroke_dashoffset_set. */
2002 }
2003 }
2007 /**
2008 * Disconnects from possible fill and stroke paint servers.
2009 */
2010 static void
2011 sp_style_paint_server_release(SPObject *obj, SPStyle *style)
2012 {
2013 SPPaintServer *server=static_cast<SPPaintServer *>(obj);
2014 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
2015 && (server == style->fill.value.paint.server))
2016 {
2017 sp_style_paint_clear(style, &style->fill);
2018 }
2020 if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
2021 && (server == style->stroke.value.paint.server))
2022 {
2023 sp_style_paint_clear(style, &style->stroke);
2024 }
2025 }
2030 /**
2031 * Emit style modified signal on style's object if server is style's fill
2032 * or stroke paint server.
2033 */
2034 static void
2035 sp_style_paint_server_modified(SPObject *obj, guint flags, SPStyle *style)
2036 {
2037 SPPaintServer *server = static_cast<SPPaintServer *>(obj);
2038 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
2039 && (server == style->fill.value.paint.server))
2040 {
2041 if (style->object) {
2042 /** \todo
2043 * fixme: I do not know, whether it is optimal - we are
2044 * forcing reread of everything (Lauris)
2045 */
2046 /** \todo
2047 * fixme: We have to use object_modified flag, because parent
2048 * flag is only available downstreams.
2049 */
2050 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
2051 }
2052 } else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
2053 && (server == style->stroke.value.paint.server))
2054 {
2055 if (style->object) {
2056 /// \todo fixme:
2057 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
2058 }
2059 } else {
2060 g_assert_not_reached();
2061 }
2062 }
2066 /**
2067 * Disconnects from filter.
2068 */
2069 static void
2070 sp_style_filter_release(SPObject *obj, SPStyle *style)
2071 {
2072 SPFilter *filter=static_cast<SPFilter *>(obj);
2073 if (style->filter.filter == filter)
2074 {
2075 sp_style_filter_clear(style);
2076 }
2077 }
2080 /**
2081 * Emit style modified signal on style's object if the filter changed.
2082 */
2083 static void
2084 sp_style_filter_modified(SPObject *obj, guint flags, SPStyle *style)
2085 {
2086 SPFilter *filter=static_cast<SPFilter *>(obj);
2087 if (style->filter.filter == filter)
2088 {
2089 if (style->object) {
2090 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
2091 }
2092 }
2093 }
2096 /**
2097 *
2098 */
2099 static void
2100 sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
2101 {
2102 sp_style_paint_clear(style, paint);
2104 if ((paint->set && paint->currentcolor) || parent->currentcolor) {
2105 paint->currentcolor = TRUE;
2106 paint->type = SP_PAINT_TYPE_COLOR;
2107 sp_color_copy(&paint->value.color, &style->color.value.color);
2108 return;
2109 }
2111 paint->type = parent->type;
2112 switch (paint->type) {
2113 case SP_PAINT_TYPE_COLOR:
2114 sp_color_copy(&paint->value.color, &parent->value.color);
2115 break;
2116 case SP_PAINT_TYPE_PAINTSERVER:
2117 paint->value.paint.server = parent->value.paint.server;
2118 paint->value.paint.uri = parent->value.paint.uri;
2119 if (paint->value.paint.server) {
2120 if (style->object && !style->cloned) { // href paintserver for style of non-clones only
2121 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
2122 if (paint == &style->fill) {
2123 style->fill_hreffed = true;
2124 } else {
2125 assert(paint == &style->stroke);
2126 style->stroke_hreffed = true;
2127 }
2128 }
2129 if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
2130 SPObject *server = paint->value.paint.server;
2131 sigc::connection release_connection
2132 = server->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_paint_server_release), style));
2133 sigc::connection modified_connection
2134 = server->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_paint_server_modified), style));
2135 if (paint == &style->fill) {
2136 style->fill_release_connection = release_connection;
2137 style->fill_modified_connection = modified_connection;
2138 } else {
2139 assert(paint == &style->stroke);
2140 style->stroke_release_connection = release_connection;
2141 style->stroke_modified_connection = modified_connection;
2142 }
2143 }
2144 }
2145 break;
2146 case SP_PAINT_TYPE_NONE:
2147 break;
2148 default:
2149 g_assert_not_reached();
2150 break;
2151 }
2152 }
2155 /**
2156 * Merge filter style from parent.
2157 * Filter effects do not inherit by default
2158 */
2159 static void
2160 sp_style_merge_ifilter(SPStyle *style, SPIFilter const *parent)
2161 {
2162 sp_style_filter_clear(style);
2163 style->filter.set = parent->set;
2164 style->filter.inherit = parent->inherit;
2165 style->filter.filter = parent->filter;
2166 style->filter.uri = parent->uri;
2167 if (style->filter.filter) {
2168 if (style->object && !style->cloned) { // href filter for style of non-clones only
2169 sp_object_href(SP_OBJECT(style->filter.filter), style);
2170 style->filter_hreffed = true;
2171 }
2172 if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
2173 SPObject *filter = style->filter.filter;
2174 style->filter_release_connection
2175 = filter->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_filter_release), style));
2176 style->filter_modified_connection
2177 = filter->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_filter_modified), style));
2178 }
2179 }
2180 }
2182 /**
2183 * Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or
2184 * SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's
2185 * complete cascaded style to style_clipboard. When you need a CSS string
2186 * for an object in the document tree, you normally call
2187 * sp_style_write_difference instead to take into account the object's parent.
2188 *
2189 * \pre style != NULL.
2190 * \pre flags in {IFSET, ALWAYS}.
2191 * \post ret != NULL.
2192 */
2193 gchar *
2194 sp_style_write_string(SPStyle const *const style, guint const flags)
2195 {
2196 /** \todo
2197 * Merge with write_difference, much duplicate code!
2198 */
2199 g_return_val_if_fail(style != NULL, NULL);
2200 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
2201 (flags == SP_STYLE_FLAG_ALWAYS) ),
2202 NULL);
2204 gchar c[BMAX];
2205 gchar *p = c;
2206 *p = '\0';
2208 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags);
2209 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags);
2210 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags);
2211 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags);
2212 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags);
2214 /* Text */
2215 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags);
2216 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags);
2217 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags);
2218 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags);
2219 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags);
2220 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags);
2221 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags);
2222 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags);
2223 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags);
2224 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags);
2226 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags);
2228 /// \todo fixme: Per type methods need default flag too (lauris)
2229 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags);
2230 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags);
2231 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags);
2232 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags);
2233 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags);
2234 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags);
2235 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags);
2236 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags);
2237 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags);
2239 if (style->marker[SP_MARKER_LOC].set) {
2240 p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value);
2241 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2242 p += g_snprintf(p, c + BMAX - p, "marker:none;");
2243 }
2244 if (style->marker[SP_MARKER_LOC_START].set) {
2245 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value);
2246 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2247 p += g_snprintf(p, c + BMAX - p, "marker-start:none;");
2248 }
2249 if (style->marker[SP_MARKER_LOC_MID].set) {
2250 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value);
2251 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2252 p += g_snprintf(p, c + BMAX - p, "marker-mid:none;");
2253 }
2254 if (style->marker[SP_MARKER_LOC_END].set) {
2255 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value);
2256 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2257 p += g_snprintf(p, c + BMAX - p, "marker-end:none;");
2258 }
2260 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags);
2262 /** \todo fixme: */
2263 if ((flags == SP_STYLE_FLAG_ALWAYS)
2264 || style->stroke_dasharray_set)
2265 {
2266 if (style->stroke_dasharray_inherit) {
2267 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2268 } else if (style->stroke_dash.n_dash && style->stroke_dash.dash) {
2269 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2270 gint i;
2271 for (i = 0; i < style->stroke_dash.n_dash; i++) {
2272 Inkscape::CSSOStringStream os;
2273 if (i) {
2274 os << ", ";
2275 }
2276 os << style->stroke_dash.dash[i];
2277 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2278 }
2279 if (p < c + BMAX) {
2280 *p++ = ';';
2281 }
2282 } else {
2283 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;");
2284 }
2285 }
2287 /** \todo fixme: */
2288 if (style->stroke_dashoffset_set) {
2289 Inkscape::CSSOStringStream os;
2290 os << "stroke-dashoffset:" << style->stroke_dash.offset << ";";
2291 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2292 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2293 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;");
2294 }
2296 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags);
2298 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags);
2299 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags);
2300 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags);
2302 /* filter: */
2303 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &style->filter, NULL, flags);
2305 p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &style->enable_background, NULL, flags);
2307 /* fixme: */
2308 p += sp_text_style_write(p, c + BMAX - p, style->text, flags);
2310 /* Get rid of trailing `;'. */
2311 if (p != c) {
2312 --p;
2313 if (*p == ';') {
2314 *p = '\0';
2315 }
2316 }
2318 return g_strdup(c);
2319 }
2322 #define STYLE_BUF_MAX
2325 /**
2326 * Dumps style to CSS string, see sp_style_write_string()
2327 *
2328 * \pre from != NULL.
2329 * \pre to != NULL.
2330 * \post ret != NULL.
2331 */
2332 gchar *
2333 sp_style_write_difference(SPStyle const *const from, SPStyle const *const to)
2334 {
2335 g_return_val_if_fail(from != NULL, NULL);
2336 g_return_val_if_fail(to != NULL, NULL);
2338 gchar c[BMAX], *p = c;
2339 *p = '\0';
2341 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF);
2342 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF);
2343 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF);
2344 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF);
2345 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF);
2347 /* Text */
2348 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF);
2349 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF);
2350 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF);
2351 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF);
2352 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF);
2353 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF);
2354 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF);
2355 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF);
2356 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF);
2357 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF);
2359 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF);
2361 /// \todo fixme: Per type methods need default flag too
2362 if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) {
2363 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET);
2364 }
2365 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET);
2366 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF);
2367 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF);
2368 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF);
2369 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF);
2370 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF);
2371 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap,
2372 &from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF);
2373 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin,
2374 &from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF);
2375 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit",
2376 &from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF);
2377 /** \todo fixme: */
2378 if (from->stroke_dasharray_set) {
2379 if (from->stroke_dasharray_inherit) {
2380 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2381 } else if (from->stroke_dash.n_dash && from->stroke_dash.dash) {
2382 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2383 for (gint i = 0; i < from->stroke_dash.n_dash; i++) {
2384 Inkscape::CSSOStringStream os;
2385 if (i) {
2386 os << ", ";
2387 }
2388 os << from->stroke_dash.dash[i];
2389 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2390 }
2391 p += g_snprintf(p, c + BMAX - p, ";");
2392 }
2393 }
2394 /* fixme: */
2395 if (from->stroke_dashoffset_set) {
2396 Inkscape::CSSOStringStream os;
2397 os << "stroke-dashoffset:" << from->stroke_dash.offset << ";";
2398 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2399 }
2400 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF);
2402 /* markers */
2403 if (from->marker[SP_MARKER_LOC].value != NULL) {
2404 p += g_snprintf(p, c + BMAX - p, "marker:%s;", from->marker[SP_MARKER_LOC].value);
2405 }
2406 if (from->marker[SP_MARKER_LOC_START].value != NULL) {
2407 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value);
2408 }
2409 if (from->marker[SP_MARKER_LOC_MID].value != NULL) {
2410 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value);
2411 }
2412 if (from->marker[SP_MARKER_LOC_END].value != NULL) {
2413 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value);
2414 }
2416 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET);
2417 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET);
2418 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET);
2420 /* filter: */
2421 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &from->filter, &to->filter, SP_STYLE_FLAG_IFDIFF);
2423 p += sp_style_write_ienum(p, c + BMAX - p, "enable-background", enum_enable_background, &from->enable_background, &to->enable_background, SP_STYLE_FLAG_IFSET);
2425 p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF);
2427 /** \todo
2428 * The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF
2429 * flag is mainly only for attributes that don't handle explicit unset well.
2430 * We may need to revisit the behaviour of this routine.
2431 */
2433 /* Get rid of trailing `;'. */
2434 if (p != c) {
2435 --p;
2436 if (*p == ';') {
2437 *p = '\0';
2438 }
2439 }
2441 return g_strdup(c);
2442 }
2446 /**
2447 * Reset all style properties.
2448 */
2449 static void
2450 sp_style_clear(SPStyle *style)
2451 {
2452 g_return_if_fail(style != NULL);
2454 sp_style_paint_clear(style, &style->fill);
2455 sp_style_paint_clear(style, &style->stroke);
2456 sp_style_filter_clear(style);
2457 if (style->stroke_dash.dash) {
2458 g_free(style->stroke_dash.dash);
2459 }
2461 /** \todo fixme: Do that text manipulation via parents */
2462 SPObject *object = style->object;
2463 gint const refcount = style->refcount;
2464 SPTextStyle *text = style->text;
2465 unsigned const text_private = style->text_private;
2466 memset(style, 0, sizeof(SPStyle));
2467 style->refcount = refcount;
2468 style->object = object;
2469 style->text = text;
2470 style->text_private = text_private;
2471 /* fixme: */
2472 style->text->font.set = FALSE;
2473 style->text->font_family.set = FALSE;
2475 style->font_size.set = FALSE;
2476 style->font_size.type = SP_FONT_SIZE_LITERAL;
2477 style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM;
2478 style->font_size.computed = 12.0;
2479 style->font_style.set = FALSE;
2480 style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL;
2481 style->font_variant.set = FALSE;
2482 style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL;
2483 style->font_weight.set = FALSE;
2484 style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL;
2485 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
2486 style->font_stretch.set = FALSE;
2487 style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL;
2489 /* text */
2490 style->text_indent.set = FALSE;
2491 style->text_indent.unit = SP_CSS_UNIT_NONE;
2492 style->text_indent.computed = 0.0;
2494 style->text_align.set = FALSE;
2495 style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START;
2497 style->text_decoration.set = FALSE;
2498 style->text_decoration.underline = FALSE;
2499 style->text_decoration.overline = FALSE;
2500 style->text_decoration.line_through = FALSE;
2501 style->text_decoration.blink = FALSE;
2503 style->line_height.set = FALSE;
2504 style->line_height.unit = SP_CSS_UNIT_PERCENT;
2505 style->line_height.normal = TRUE;
2506 style->line_height.value = style->line_height.computed = 1.0;
2508 style->letter_spacing.set = FALSE;
2509 style->letter_spacing.unit = SP_CSS_UNIT_NONE;
2510 style->letter_spacing.normal = TRUE;
2511 style->letter_spacing.value = style->letter_spacing.computed = 0.0;
2513 style->word_spacing.set = FALSE;
2514 style->word_spacing.unit = SP_CSS_UNIT_NONE;
2515 style->word_spacing.normal = TRUE;
2516 style->word_spacing.value = style->word_spacing.computed = 0.0;
2518 style->text_transform.set = FALSE;
2519 style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE;
2521 style->direction.set = FALSE;
2522 style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR;
2524 style->block_progression.set = FALSE;
2525 style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB;
2527 style->writing_mode.set = FALSE;
2528 style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB;
2531 style->text_anchor.set = FALSE;
2532 style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START;
2535 style->opacity.value = SP_SCALE24_MAX;
2536 style->visibility.set = FALSE;
2537 style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE;
2538 style->display.set = FALSE;
2539 style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE;
2540 style->overflow.set = FALSE;
2541 style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE;
2543 style->color.type = SP_PAINT_TYPE_COLOR;
2544 sp_color_set_rgb_float(&style->color.value.color, 0.0, 0.0, 0.0);
2546 style->fill.type = SP_PAINT_TYPE_COLOR;
2547 sp_color_set_rgb_float(&style->fill.value.color, 0.0, 0.0, 0.0);
2548 style->fill_opacity.value = SP_SCALE24_MAX;
2549 style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO;
2551 style->stroke.type = SP_PAINT_TYPE_NONE;
2552 style->stroke.set = FALSE;
2553 sp_color_set_rgb_float(&style->stroke.value.color, 0.0, 0.0, 0.0);
2554 style->stroke_opacity.value = SP_SCALE24_MAX;
2556 style->stroke_width.set = FALSE;
2557 style->stroke_width.unit = SP_CSS_UNIT_NONE;
2558 style->stroke_width.computed = 1.0;
2560 style->stroke_linecap.set = FALSE;
2561 style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT;
2562 style->stroke_linejoin.set = FALSE;
2563 style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER;
2565 style->stroke_miterlimit.set = FALSE;
2566 style->stroke_miterlimit.value = 4.0;
2568 style->stroke_dash.n_dash = 0;
2569 style->stroke_dash.dash = NULL;
2570 style->stroke_dash.offset = 0.0;
2572 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
2573 g_free(style->marker[i].value);
2574 style->marker[i].set = FALSE;
2575 }
2577 style->filter.set = FALSE;
2578 style->filter.uri = NULL;
2579 style->filter.filter = NULL;
2581 style->enable_background.value = SP_CSS_BACKGROUND_ACCUMULATE;
2582 style->enable_background.set = false;
2583 style->enable_background.inherit = false;
2584 }
2588 /**
2589 *
2590 */
2591 static void
2592 sp_style_read_dash(SPStyle *style, gchar const *str)
2593 {
2594 /* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */
2595 style->stroke_dasharray_set = TRUE;
2597 if (strcmp(str, "inherit") == 0) {
2598 style->stroke_dasharray_inherit = true;
2599 return;
2600 }
2601 style->stroke_dasharray_inherit = false;
2603 NRVpathDash &dash = style->stroke_dash;
2604 g_free(dash.dash);
2605 dash.dash = NULL;
2607 if (strcmp(str, "none") == 0) {
2608 dash.n_dash = 0;
2609 return;
2610 }
2612 gint n_dash = 0;
2613 gdouble d[64];
2614 gchar *e = NULL;
2616 bool LineSolid=true;
2617 while (e != str && n_dash < 64) {
2618 /* TODO: Should allow <length> rather than just a unitless (px) number. */
2619 d[n_dash] = g_ascii_strtod(str, (char **) &e);
2620 if (d[n_dash] > 0.00000001)
2621 LineSolid = false;
2622 if (e != str) {
2623 n_dash += 1;
2624 str = e;
2625 }
2626 while (str && *str && !isalnum(*str)) str += 1;
2627 }
2629 if (LineSolid) {
2630 dash.n_dash = 0;
2631 return;
2632 }
2634 if (n_dash > 0) {
2635 dash.dash = g_new(gdouble, n_dash);
2636 memcpy(dash.dash, d, sizeof(gdouble) * n_dash);
2637 dash.n_dash = n_dash;
2638 }
2639 }
2642 /*#########################
2643 ## SPTextStyle operations
2644 #########################*/
2647 /**
2648 * Return new SPTextStyle object with default settings.
2649 */
2650 static SPTextStyle *
2651 sp_text_style_new()
2652 {
2653 SPTextStyle *ts = g_new0(SPTextStyle, 1);
2654 ts->refcount = 1;
2655 sp_text_style_clear(ts);
2657 ts->font.value = g_strdup("Bitstream Vera Sans");
2658 ts->font_family.value = g_strdup("Bitstream Vera Sans");
2660 return ts;
2661 }
2664 /**
2665 * Clear text style settings.
2666 */
2667 static void
2668 sp_text_style_clear(SPTextStyle *ts)
2669 {
2670 ts->font.set = FALSE;
2671 ts->font_family.set = FALSE;
2672 }
2676 /**
2677 * Reduce refcount of text style and possibly free it.
2678 */
2679 static SPTextStyle *
2680 sp_text_style_unref(SPTextStyle *st)
2681 {
2682 st->refcount -= 1;
2684 if (st->refcount < 1) {
2685 g_free(st->font.value);
2686 g_free(st->font_family.value);
2687 g_free(st);
2688 }
2690 return NULL;
2691 }
2695 /**
2696 * Return duplicate of text style.
2697 */
2698 static SPTextStyle *
2699 sp_text_style_duplicate_unset(SPTextStyle *st)
2700 {
2701 SPTextStyle *nt = g_new0(SPTextStyle, 1);
2702 nt->refcount = 1;
2704 nt->font.value = g_strdup(st->font.value);
2705 nt->font_family.value = g_strdup(st->font_family.value);
2707 return nt;
2708 }
2712 /**
2713 * Write SPTextStyle object into string.
2714 */
2715 static guint
2716 sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags)
2717 {
2718 gint d = 0;
2720 // We do not do diffing for text style
2721 if (flags == SP_STYLE_FLAG_IFDIFF)
2722 flags = SP_STYLE_FLAG_IFSET;
2724 d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags);
2725 return d;
2726 }
2730 /* The following sp_tyle_read_* functions ignore invalid values, as per
2731 * http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors.
2732 *
2733 * [However, the SVG spec is somewhat unclear as to whether the style attribute should
2734 * be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE
2735 * pairs, in which case SVG's error-handling rules
2736 * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.]
2737 */
2740 /**
2741 * Set SPIFloat object from string.
2742 */
2743 static void
2744 sp_style_read_ifloat(SPIFloat *val, gchar const *str)
2745 {
2746 if (!strcmp(str, "inherit")) {
2747 val->set = TRUE;
2748 val->inherit = TRUE;
2749 } else {
2750 gfloat value;
2751 if (sp_svg_number_read_f(str, &value)) {
2752 val->set = TRUE;
2753 val->inherit = FALSE;
2754 val->value = value;
2755 }
2756 }
2757 }
2761 /**
2762 * Set SPIScale24 object from string.
2763 */
2764 static void
2765 sp_style_read_iscale24(SPIScale24 *val, gchar const *str)
2766 {
2767 if (!strcmp(str, "inherit")) {
2768 val->set = TRUE;
2769 val->inherit = TRUE;
2770 } else {
2771 gfloat value;
2772 if (sp_svg_number_read_f(str, &value)) {
2773 val->set = TRUE;
2774 val->inherit = FALSE;
2775 value = CLAMP(value, 0.0f, (gfloat) SP_SCALE24_MAX);
2776 val->value = SP_SCALE24_FROM_FLOAT(value);
2777 }
2778 }
2779 }
2781 /**
2782 * Reads a style value and performs lookup based on the given style value enumerations.
2783 */
2784 static void
2785 sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict,
2786 bool const can_explicitly_inherit)
2787 {
2788 if ( can_explicitly_inherit && !strcmp(str, "inherit") ) {
2789 val->set = TRUE;
2790 val->inherit = TRUE;
2791 } else {
2792 for (unsigned i = 0; dict[i].key; i++) {
2793 if (!strcmp(str, dict[i].key)) {
2794 val->set = TRUE;
2795 val->inherit = FALSE;
2796 val->value = dict[i].value;
2797 /* Save copying for values not needing it */
2798 val->computed = val->value;
2799 break;
2800 }
2801 }
2802 }
2803 }
2807 /**
2808 * Set SPIString object from string.
2809 */
2810 static void
2811 sp_style_read_istring(SPIString *val, gchar const *str)
2812 {
2813 g_free(val->value);
2815 if (!strcmp(str, "inherit")) {
2816 val->set = TRUE;
2817 val->inherit = TRUE;
2818 val->value = NULL;
2819 } else {
2820 val->set = TRUE;
2821 val->inherit = FALSE;
2822 val->value = g_strdup(str);
2823 }
2824 }
2828 /**
2829 * Set SPILength object from string.
2830 */
2831 static void
2832 sp_style_read_ilength(SPILength *val, gchar const *str)
2833 {
2834 if (!strcmp(str, "inherit")) {
2835 val->set = TRUE;
2836 val->inherit = TRUE;
2837 } else {
2838 gdouble value;
2839 gchar *e;
2840 /** \todo fixme: Move this to standard place (Lauris) */
2841 value = g_ascii_strtod(str, &e);
2842 if ((gchar const *) e != str) {
2843 /** \todo
2844 * Allow the number of px per inch to vary (document preferences,
2845 * X server or whatever). E.g. don't fill in computed here, do
2846 * it at the same time as percentage units are done.
2847 */
2848 if (!*e) {
2849 /* Userspace */
2850 val->unit = SP_CSS_UNIT_NONE;
2851 val->computed = value;
2852 } else if (!strcmp(e, "px")) {
2853 /* Userspace */
2854 val->unit = SP_CSS_UNIT_PX;
2855 val->computed = value;
2856 } else if (!strcmp(e, "pt")) {
2857 /* Userspace / DEVICESCALE */
2858 val->unit = SP_CSS_UNIT_PT;
2859 val->computed = value * PX_PER_PT;
2860 } else if (!strcmp(e, "pc")) {
2861 /* 1 pica = 12pt; FIXME: add it to SPUnit */
2862 val->unit = SP_CSS_UNIT_PC;
2863 val->computed = value * PX_PER_PT * 12;
2864 } else if (!strcmp(e, "mm")) {
2865 val->unit = SP_CSS_UNIT_MM;
2866 val->computed = value * PX_PER_MM;
2867 } else if (!strcmp(e, "cm")) {
2868 val->unit = SP_CSS_UNIT_CM;
2869 val->computed = value * PX_PER_CM;
2870 } else if (!strcmp(e, "in")) {
2871 val->unit = SP_CSS_UNIT_IN;
2872 val->computed = value * PX_PER_IN;
2873 } else if (!strcmp(e, "em")) {
2874 /* EM square */
2875 val->unit = SP_CSS_UNIT_EM;
2876 val->value = value;
2877 } else if (!strcmp(e, "ex")) {
2878 /* ex square */
2879 val->unit = SP_CSS_UNIT_EX;
2880 val->value = value;
2881 } else if (!strcmp(e, "%")) {
2882 /* Percentage */
2883 val->unit = SP_CSS_UNIT_PERCENT;
2884 val->value = value * 0.01;
2885 } else {
2886 /* Invalid */
2887 return;
2888 }
2889 val->set = TRUE;
2890 val->inherit = FALSE;
2891 }
2892 }
2893 }
2895 /**
2896 * Set SPILengthOrNormal object from string.
2897 */
2898 static void
2899 sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str)
2900 {
2901 if (!strcmp(str, "normal")) {
2902 val->set = TRUE;
2903 val->inherit = FALSE;
2904 val->normal = TRUE;
2905 val->unit = SP_CSS_UNIT_NONE;
2906 val->value = val->computed = 0.0;
2907 } else {
2908 SPILength length;
2909 sp_style_read_ilength(&length, str);
2910 val->set = length.set;
2911 val->inherit = length.inherit;
2912 val->normal = FALSE;
2913 val->unit = length.unit;
2914 val->value = length.value;
2915 val->computed = length.computed;
2916 }
2917 }
2919 /**
2920 * Set SPITextDecoration object from string.
2921 */
2922 static void
2923 sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str)
2924 {
2925 if (!strcmp(str, "inherit")) {
2926 val->set = TRUE;
2927 val->inherit = TRUE;
2928 } else if (!strcmp(str, "none")) {
2929 val->set = TRUE;
2930 val->inherit = FALSE;
2931 val->underline = FALSE;
2932 val->overline = FALSE;
2933 val->line_through = FALSE;
2934 val->blink = FALSE;
2935 } else {
2936 bool found_underline = false;
2937 bool found_overline = false;
2938 bool found_line_through = false;
2939 bool found_blink = false;
2940 for ( ; *str ; str++ ) {
2941 if (*str == ' ') continue;
2942 if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) {
2943 found_underline = true;
2944 str += 9;
2945 } else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) {
2946 found_overline = true;
2947 str += 8;
2948 } else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) {
2949 found_line_through = true;
2950 str += 12;
2951 } else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) {
2952 found_blink = true;
2953 str += 5;
2954 } else {
2955 return; // invalid value
2956 }
2957 }
2958 if (!(found_underline || found_overline || found_line_through || found_blink)) {
2959 return; // invalid value: empty
2960 }
2961 val->set = TRUE;
2962 val->inherit = FALSE;
2963 val->underline = found_underline;
2964 val->overline = found_overline;
2965 val->line_through = found_line_through;
2966 val->blink = found_blink;
2967 }
2968 }
2970 /**
2971 * Set SPIPaint object from string containing an integer value.
2972 * \param document Ignored
2973 */
2974 static void
2975 sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2976 {
2977 paint->currentcolor = FALSE; /* currentColor not a valid <color>. */
2978 if (!strcmp(str, "inherit")) {
2979 paint->set = TRUE;
2980 paint->inherit = TRUE;
2981 } else {
2982 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
2983 if (rgb0 != 0xff) {
2984 paint->type = SP_PAINT_TYPE_COLOR;
2985 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2986 paint->set = TRUE;
2987 paint->inherit = FALSE;
2988 }
2989 }
2990 }
2993 /**
2994 * Set SPIPaint object from string.
2995 *
2996 * \pre paint == \&style.fill || paint == \&style.stroke.
2997 */
2998 static void
2999 sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
3000 {
3001 while (isspace(*str)) {
3002 ++str;
3003 }
3005 if (streq(str, "inherit")) {
3006 paint->set = TRUE;
3007 paint->inherit = TRUE;
3008 paint->currentcolor = FALSE;
3009 } else if (streq(str, "currentColor") && paint != &style->color) {
3010 paint->set = TRUE;
3011 paint->inherit = FALSE;
3012 paint->currentcolor = TRUE;
3013 } else if (streq(str, "none") && paint != &style->color) {
3014 paint->type = SP_PAINT_TYPE_NONE;
3015 paint->set = TRUE;
3016 paint->inherit = FALSE;
3017 paint->currentcolor = FALSE;
3018 } else if (strneq(str, "url", 3) && paint != &style->color) {
3019 // this is alloc'd uri, but seems to be shared with a parent
3020 // potentially, so it's not any easy g_free case...
3021 paint->value.paint.uri = extract_uri(str);
3022 if (paint->value.paint.uri == NULL || *(paint->value.paint.uri) == '\0') {
3023 paint->type = SP_PAINT_TYPE_NONE;
3024 return;
3025 }
3026 paint->type = SP_PAINT_TYPE_PAINTSERVER;
3027 paint->set = TRUE;
3028 paint->inherit = FALSE;
3029 paint->currentcolor = FALSE;
3030 if (document) {
3031 SPObject *ps = sp_uri_reference_resolve(document, str);
3032 if (ps && SP_IS_PAINT_SERVER(ps)) {
3033 paint->value.paint.server = SP_PAINT_SERVER(ps);
3034 if (style->object && !style->cloned) {
3035 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
3036 if (paint == &style->fill) {
3037 style->fill_hreffed = true;
3038 } else {
3039 assert(paint == &style->stroke);
3040 style->stroke_hreffed = true;
3041 }
3042 }
3043 if (style->object || style->cloned) {
3044 SPObject *server = paint->value.paint.server;
3045 sigc::connection release_connection
3046 = server->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_paint_server_release), style));
3047 sigc::connection modified_connection
3048 = server->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_paint_server_modified), style));
3049 if (paint == &style->fill) {
3050 style->fill_release_connection = release_connection;
3051 style->fill_modified_connection = modified_connection;
3052 } else {
3053 assert(paint == &style->stroke);
3054 style->stroke_release_connection = release_connection;
3055 style->stroke_modified_connection = modified_connection;
3056 }
3057 }
3058 } else {
3059 paint->value.paint.server = NULL;
3060 }
3061 }
3062 } else {
3063 guint32 const rgb0 = sp_svg_read_color(str, &str, 0xff);
3064 if (rgb0 != 0xff) {
3065 paint->type = SP_PAINT_TYPE_COLOR;
3066 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
3067 paint->set = TRUE;
3068 paint->inherit = FALSE;
3069 paint->currentcolor = FALSE;
3071 while (g_ascii_isspace(*str)) {
3072 ++str;
3073 }
3074 if (strneq(str, "icc-color(", 10)) {
3075 SVGICCColor* tmp = new SVGICCColor();
3076 if ( ! sp_svg_read_icc_color( str, &str, tmp ) ) {
3077 delete tmp;
3078 tmp = 0;
3079 }
3080 paint->value.iccColor = tmp;
3081 }
3082 }
3083 }
3084 }
3088 /**
3089 * Set SPIFontSize object from string.
3090 */
3091 static void
3092 sp_style_read_ifontsize(SPIFontSize *val, gchar const *str)
3093 {
3094 if (!strcmp(str, "inherit")) {
3095 val->set = TRUE;
3096 val->inherit = TRUE;
3097 } else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) {
3098 for (unsigned i = 0; enum_font_size[i].key; i++) {
3099 if (!strcmp(str, enum_font_size[i].key)) {
3100 val->set = TRUE;
3101 val->inherit = FALSE;
3102 val->type = SP_FONT_SIZE_LITERAL;
3103 val->value = enum_font_size[i].value;
3104 return;
3105 }
3106 }
3107 /* Invalid */
3108 return;
3109 } else {
3110 gdouble value;
3111 gchar *e;
3112 /* fixme: Move this to standard place (Lauris) */
3113 value = g_ascii_strtod(str, &e);
3114 if ((gchar const *) e != str) {
3115 if (!*e) {
3116 /* Userspace */
3117 } else if (!strcmp(e, "px")) {
3118 /* Userspace */
3119 } else if (!strcmp(e, "pt")) {
3120 /* Userspace * DEVICESCALE */
3121 value *= PX_PER_PT;
3122 } else if (!strcmp(e, "pc")) {
3123 /* 12pt */
3124 value *= PX_PER_PT * 12.0;
3125 } else if (!strcmp(e, "mm")) {
3126 value *= PX_PER_MM;
3127 } else if (!strcmp(e, "cm")) {
3128 value *= PX_PER_CM;
3129 } else if (!strcmp(e, "in")) {
3130 value *= PX_PER_IN;
3131 } else if (!strcmp(e, "%")) {
3132 /* Percentage */
3133 val->set = TRUE;
3134 val->inherit = FALSE;
3135 val->type = SP_FONT_SIZE_PERCENTAGE;
3136 val->value = SP_F8_16_FROM_FLOAT(value / 100.0);
3137 return;
3138 } else {
3139 /* Invalid */
3140 return;
3141 }
3142 /* Length */
3143 val->set = TRUE;
3144 val->inherit = FALSE;
3145 val->type = SP_FONT_SIZE_LENGTH;
3146 val->computed = value;
3147 return;
3148 }
3149 }
3150 }
3154 /**
3155 * Set SPIFilter object from string.
3156 */
3157 static void
3158 sp_style_read_ifilter(gchar const *str, SPStyle * style, SPDocument *document)
3159 {
3160 SPIFilter *f = &(style->filter);
3161 /* Try all possible values: inherit, none, uri */
3162 if (streq(str, "inherit")) {
3163 f->set = TRUE;
3164 f->inherit = TRUE;
3165 f->filter = NULL;
3166 } else if(streq(str, "none")) {
3167 f->set = TRUE;
3168 f->inherit = FALSE;
3169 f->filter = NULL;
3170 } else if (strneq(str, "url", 3)) {
3171 f->uri = extract_uri(str);
3172 if(f->uri == NULL || f->uri[0] == '\0') {
3173 g_warning("Specified filter url is empty");
3174 f->set = TRUE;
3175 f->inherit = FALSE;
3176 f->filter = NULL;
3177 return;
3178 }
3179 f->set = TRUE;
3180 f->inherit = FALSE;
3181 f->filter = NULL;
3182 if (document) {
3183 SPObject *obj = sp_uri_reference_resolve(document, str);
3184 if (SP_IS_FILTER(obj)) {
3185 f->filter = SP_FILTER(obj);
3186 if (style->object && !style->cloned) {
3187 sp_object_href(obj, style);
3188 style->filter_hreffed = true;
3189 }
3190 if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
3191 SPObject *filter = style->filter.filter;
3192 style->filter_release_connection
3193 = filter->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_filter_release), style));
3194 style->filter_modified_connection
3195 = filter->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_filter_modified), style));
3196 }
3197 } else {
3198 g_warning("Element '%s' not found or is not a filter", f->uri);
3199 }
3200 }
3202 } else {
3203 /* We shouldn't reach this if SVG input is well-formed */
3204 f->set = FALSE;
3205 f->inherit = FALSE;
3206 f->filter = NULL;
3207 f->uri = NULL;
3208 }
3209 }
3211 /**
3212 * Set SPIEnum object from repr attribute.
3213 */
3214 static void
3215 sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr,
3216 gchar const *key, SPStyleEnum const *dict,
3217 bool const can_explicitly_inherit)
3218 {
3219 gchar const *str = repr->attribute(key);
3220 if (str) {
3221 sp_style_read_ienum(val, str, dict, can_explicitly_inherit);
3222 }
3223 }
3227 /**
3228 * Set SPILength object from repr attribute.
3229 */
3230 static void
3231 sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key)
3232 {
3233 gchar const *str = repr->attribute(key);
3234 if (str) {
3235 sp_style_read_ilength(val, str);
3236 }
3237 }
3239 /**
3240 * Set SPIFontSize object from repr attribute.
3241 */
3242 static void
3243 sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key)
3244 {
3245 gchar const *str = repr->attribute(key);
3246 if (str) {
3247 sp_style_read_ifontsize(val, str);
3248 }
3249 }
3252 /**
3253 * Set SPIFloat object from repr attribute.
3254 */
3255 static void
3256 sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key)
3257 {
3258 gchar const *str = repr->attribute(key);
3259 if (str) {
3260 sp_style_read_ifloat(val, str);
3261 }
3262 }
3265 /**
3266 * Write SPIFloat object into string.
3267 */
3268 static gint
3269 sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key,
3270 SPIFloat const *const val, SPIFloat const *const base, guint const flags)
3271 {
3272 Inkscape::CSSOStringStream os;
3274 if ((flags & SP_STYLE_FLAG_ALWAYS)
3275 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3276 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3277 && (!base->set || (val->value != base->value))))
3278 {
3279 if (val->inherit) {
3280 return g_snprintf(p, len, "%s:inherit;", key);
3281 } else {
3282 os << key << ":" << val->value << ";";
3283 return g_strlcpy(p, os.str().c_str(), len);
3284 }
3285 }
3286 return 0;
3287 }
3290 /**
3291 * Write SPIScale24 object into string.
3292 */
3293 static gint
3294 sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key,
3295 SPIScale24 const *const val, SPIScale24 const *const base,
3296 guint const flags)
3297 {
3298 Inkscape::CSSOStringStream os;
3300 if ((flags & SP_STYLE_FLAG_ALWAYS)
3301 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3302 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3303 && (!base->set || (val->value != base->value))))
3304 {
3305 if (val->inherit) {
3306 return g_snprintf(p, len, "%s:inherit;", key);
3307 } else {
3308 os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";";
3309 return g_strlcpy(p, os.str().c_str(), len);
3310 }
3311 }
3312 return 0;
3313 }
3316 /**
3317 * Write SPIEnum object into string.
3318 */
3319 static gint
3320 sp_style_write_ienum(gchar *p, gint const len, gchar const *const key,
3321 SPStyleEnum const *const dict,
3322 SPIEnum const *const val, SPIEnum const *const base, guint const flags)
3323 {
3324 if ((flags & SP_STYLE_FLAG_ALWAYS)
3325 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3326 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3327 && (!base->set || (val->computed != base->computed))))
3328 {
3329 if (val->inherit) {
3330 return g_snprintf(p, len, "%s:inherit;", key);
3331 }
3332 for (unsigned i = 0; dict[i].key; i++) {
3333 if (dict[i].value == static_cast< gint > (val->value) ) {
3334 return g_snprintf(p, len, "%s:%s;", key, dict[i].key);
3335 }
3336 }
3337 }
3338 return 0;
3339 }
3343 /**
3344 * Write SPIString object into string.
3345 */
3346 static gint
3347 sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
3348 SPIString const *const val, SPIString const *const base, guint const flags)
3349 {
3350 if ((flags & SP_STYLE_FLAG_ALWAYS)
3351 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3352 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3353 && (!base->set || strcmp(val->value, base->value))))
3354 {
3355 if (val->inherit) {
3356 return g_snprintf(p, len, "%s:inherit;", key);
3357 } else {
3358 gchar *val_quoted = css2_escape_quote(val->value);
3359 return g_snprintf(p, len, "%s:%s;", key, val_quoted);
3360 g_free (val_quoted);
3361 }
3362 }
3363 return 0;
3364 }
3367 /**
3368 *
3369 */
3370 static bool
3371 sp_length_differ(SPILength const *const a, SPILength const *const b)
3372 {
3373 if (a->unit != b->unit) {
3374 if (a->unit == SP_CSS_UNIT_EM) return true;
3375 if (a->unit == SP_CSS_UNIT_EX) return true;
3376 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3377 if (b->unit == SP_CSS_UNIT_EM) return true;
3378 if (b->unit == SP_CSS_UNIT_EX) return true;
3379 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3380 }
3382 return (a->computed != b->computed);
3383 }
3387 /**
3388 * Write SPILength object into string.
3389 */
3390 static gint
3391 sp_style_write_ilength(gchar *p, gint const len, gchar const *const key,
3392 SPILength const *const val, SPILength const *const base, guint const flags)
3393 {
3394 Inkscape::CSSOStringStream os;
3396 if ((flags & SP_STYLE_FLAG_ALWAYS)
3397 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3398 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3399 && (!base->set || sp_length_differ(val, base))))
3400 {
3401 if (val->inherit) {
3402 return g_snprintf(p, len, "%s:inherit;", key);
3403 } else {
3404 switch (val->unit) {
3405 case SP_CSS_UNIT_NONE:
3406 os << key << ":" << val->computed << ";";
3407 return g_strlcpy(p, os.str().c_str(), len);
3408 break;
3409 case SP_CSS_UNIT_PX:
3410 os << key << ":" << val->computed << "px;";
3411 return g_strlcpy(p, os.str().c_str(), len);
3412 break;
3413 case SP_CSS_UNIT_PT:
3414 os << key << ":" << val->computed * PT_PER_PX << "pt;";
3415 return g_strlcpy(p, os.str().c_str(), len);
3416 break;
3417 case SP_CSS_UNIT_PC:
3418 os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;";
3419 return g_strlcpy(p, os.str().c_str(), len);
3420 break;
3421 case SP_CSS_UNIT_MM:
3422 os << key << ":" << val->computed * MM_PER_PX << "mm;";
3423 return g_strlcpy(p, os.str().c_str(), len);
3424 break;
3425 case SP_CSS_UNIT_CM:
3426 os << key << ":" << val->computed * CM_PER_PX << "cm;";
3427 return g_strlcpy(p, os.str().c_str(), len);
3428 break;
3429 case SP_CSS_UNIT_IN:
3430 os << key << ":" << val->computed * IN_PER_PX << "in;";
3431 return g_strlcpy(p, os.str().c_str(), len);
3432 break;
3433 case SP_CSS_UNIT_EM:
3434 os << key << ":" << val->value << "em;";
3435 return g_strlcpy(p, os.str().c_str(), len);
3436 break;
3437 case SP_CSS_UNIT_EX:
3438 os << key << ":" << val->value << "ex;";
3439 return g_strlcpy(p, os.str().c_str(), len);
3440 break;
3441 case SP_CSS_UNIT_PERCENT:
3442 os << key << ":" << (val->value * 100.0) << "%;";
3443 return g_strlcpy(p, os.str().c_str(), len);
3444 break;
3445 default:
3446 /* Invalid */
3447 break;
3448 }
3449 }
3450 }
3451 return 0;
3452 }
3455 /**
3456 *
3457 */
3458 static bool
3459 sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b)
3460 {
3461 if (a->normal != b->normal) return true;
3462 if (a->normal) return false;
3464 if (a->unit != b->unit) {
3465 if (a->unit == SP_CSS_UNIT_EM) return true;
3466 if (a->unit == SP_CSS_UNIT_EX) return true;
3467 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3468 if (b->unit == SP_CSS_UNIT_EM) return true;
3469 if (b->unit == SP_CSS_UNIT_EX) return true;
3470 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3471 }
3473 return (a->computed != b->computed);
3474 }
3476 /**
3477 * Write SPILengthOrNormal object into string.
3478 */
3479 static gint
3480 sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key,
3481 SPILengthOrNormal const *const val,
3482 SPILengthOrNormal const *const base,
3483 guint const flags)
3484 {
3485 if ((flags & SP_STYLE_FLAG_ALWAYS)
3486 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3487 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3488 && (!base->set || sp_lengthornormal_differ(val, base))))
3489 {
3490 if (val->normal) {
3491 return g_snprintf(p, len, "%s:normal;", key);
3492 } else {
3493 SPILength length;
3494 length.set = val->set;
3495 length.inherit = val->inherit;
3496 length.unit = val->unit;
3497 length.value = val->value;
3498 length.computed = val->computed;
3499 return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS);
3500 }
3501 }
3502 return 0;
3503 }
3505 /**
3506 *
3507 */
3508 static bool
3509 sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b)
3510 {
3511 return a->underline != b->underline
3512 || a->overline != b->overline
3513 || a->line_through != b->line_through
3514 || a->blink != b->blink;
3515 }
3517 /**
3518 * Write SPITextDecoration object into string.
3519 */
3520 static gint
3521 sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key,
3522 SPITextDecoration const *const val,
3523 SPITextDecoration const *const base,
3524 guint const flags)
3525 {
3526 Inkscape::CSSOStringStream os;
3528 if ((flags & SP_STYLE_FLAG_ALWAYS)
3529 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3530 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3531 && (!base->set || sp_textdecoration_differ(val, base))))
3532 {
3533 if (val->inherit) {
3534 return g_snprintf(p, len, "%s:inherit;", key);
3535 } else {
3536 os << key << ":";
3537 if (val->underline || val->overline || val->line_through || val->blink) {
3538 if (val->underline) os << " underline";
3539 if (val->overline) os << " overline";
3540 if (val->line_through) os << " line-through";
3541 if (val->blink) os << " blink";
3542 } else
3543 os << "none";
3544 os << ";";
3545 return g_strlcpy(p, os.str().c_str(), len);
3546 }
3547 }
3548 return 0;
3549 }
3551 /**
3552 *
3553 */
3554 static bool
3555 sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
3556 {
3557 if (a->type != b->type)
3558 return true;
3559 if (a->type == SP_PAINT_TYPE_COLOR)
3560 return !(sp_color_is_equal(&a->value.color, &b->value.color)
3561 && ((a->value.iccColor == b->value.iccColor)
3562 || (a->value.iccColor && b->value.iccColor
3563 && (a->value.iccColor->colorProfile == b->value.iccColor->colorProfile)
3564 && (a->value.iccColor->colors == b->value.iccColor->colors))));
3565 /* todo: Allow for epsilon differences in iccColor->colors, e.g. changes small enough not to show up
3566 * in the string representation. */
3567 if (a->type == SP_PAINT_TYPE_PAINTSERVER)
3568 return (a->value.paint.server != b->value.paint.server);
3569 return false;
3570 }
3574 /**
3575 * Write SPIPaint object into string.
3576 */
3577 static gint
3578 sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
3579 SPIPaint const *const paint, SPIPaint const *const base, guint const flags)
3580 {
3581 if ((flags & SP_STYLE_FLAG_ALWAYS)
3582 || ((flags & SP_STYLE_FLAG_IFSET) && paint->set)
3583 || ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set
3584 && (!base->set || sp_paint_differ(paint, base))))
3585 {
3586 if (paint->inherit) {
3587 return g_snprintf(b, len, "%s:inherit;", key);
3588 } else if (paint->currentcolor) {
3589 return g_snprintf(b, len, "%s:currentColor;", key);
3590 } else {
3591 switch (paint->type) {
3592 case SP_PAINT_TYPE_COLOR: {
3593 char color_buf[8];
3594 sp_svg_write_color(color_buf, sizeof(color_buf), sp_color_get_rgba32_ualpha(&paint->value.color, 0));
3595 if (paint->value.iccColor) {
3596 CSSOStringStream css;
3597 css << color_buf << " icc-color(" << paint->value.iccColor->colorProfile;
3598 for (vector<double>::const_iterator i(paint->value.iccColor->colors.begin()),
3599 iEnd(paint->value.iccColor->colors.end());
3600 i != iEnd; ++i) {
3601 css << ", " << *i;
3602 }
3603 css << ')';
3604 return g_snprintf(b, len, "%s:%s;", key, css.gcharp());
3605 } else {
3606 return g_snprintf(b, len, "%s:%s;", key, color_buf);
3607 }
3608 }
3609 case SP_PAINT_TYPE_PAINTSERVER:
3610 return g_snprintf(b, len, "%s:url(%s);", key, paint->value.paint.uri);
3611 default:
3612 break;
3613 }
3614 return g_snprintf(b, len, "%s:none;", key);
3615 }
3616 }
3617 return 0;
3618 }
3621 /**
3622 *
3623 */
3624 static bool
3625 sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b)
3626 {
3627 if (a->type != b->type)
3628 return true;
3629 if (a->type == SP_FONT_SIZE_LENGTH) {
3630 if (a->computed != b->computed)
3631 return true;
3632 } else {
3633 if (a->value != b->value)
3634 return true;
3635 }
3636 return false;
3637 }
3640 /**
3641 * Write SPIFontSize object into string.
3642 */
3643 static gint
3644 sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key,
3645 SPIFontSize const *const val, SPIFontSize const *const base,
3646 guint const flags)
3647 {
3648 if ((flags & SP_STYLE_FLAG_ALWAYS)
3649 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3650 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3651 && (!base->set || sp_fontsize_differ(val, base))))
3652 {
3653 if (val->inherit) {
3654 return g_snprintf(p, len, "%s:inherit;", key);
3655 } else if (val->type == SP_FONT_SIZE_LITERAL) {
3656 for (unsigned i = 0; enum_font_size[i].key; i++) {
3657 if (enum_font_size[i].value == static_cast< gint > (val->value) ) {
3658 return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key);
3659 }
3660 }
3661 } else if (val->type == SP_FONT_SIZE_LENGTH) {
3662 Inkscape::CSSOStringStream os;
3663 os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
3664 return g_strlcpy(p, os.str().c_str(), len);
3665 } else if (val->type == SP_FONT_SIZE_PERCENTAGE) {
3666 Inkscape::CSSOStringStream os;
3667 os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;";
3668 return g_strlcpy(p, os.str().c_str(), len);
3669 }
3670 }
3671 return 0;
3672 }
3675 /**
3676 * Write SPIFilter object into string.
3677 */
3678 static gint
3679 sp_style_write_ifilter(gchar *p, gint const len, gchar const *key,
3680 SPIFilter const *const val, SPIFilter const *const base,
3681 guint const flags)
3682 {
3683 if ((flags & SP_STYLE_FLAG_ALWAYS)
3684 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3685 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set))
3686 {
3687 if (val->inherit) {
3688 return g_snprintf(p, len, "%s:inherit;", key);
3689 } else if (val->uri) {
3690 return g_snprintf(p, len, "%s:url(%s);", key, val->uri);
3691 }
3692 }
3695 return 0;
3696 }
3699 /**
3700 * Clear paint object, and disconnect style from paintserver (if present).
3701 */
3702 static void
3703 sp_style_paint_clear(SPStyle *style, SPIPaint *paint)
3704 {
3705 if ((paint->type == SP_PAINT_TYPE_PAINTSERVER) && paint->value.paint.server) {
3706 if (paint == &style->fill) {
3707 if (style->fill_hreffed) {
3708 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3709 style->fill_hreffed = false;
3710 }
3711 style->fill_release_connection.disconnect();
3712 style->fill_modified_connection.disconnect();
3713 } else {
3714 assert(paint == &style->stroke); // Only fill & stroke can have a paint server.
3715 if (style->stroke_hreffed) {
3716 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3717 style->stroke_hreffed = false;
3718 }
3719 style->stroke_release_connection.disconnect();
3720 style->stroke_modified_connection.disconnect();
3721 }
3723 paint->value.paint.server = NULL;
3724 }
3725 paint->value.paint.uri = NULL;
3726 paint->type = SP_PAINT_TYPE_NONE;
3727 delete paint->value.iccColor;
3728 paint->value.iccColor = NULL;
3729 }
3732 /**
3733 * Clear filter object, and disconnect style from paintserver (if present).
3734 */
3735 static void
3736 sp_style_filter_clear(SPStyle *style)
3737 {
3739 if (style->filter_hreffed) {
3740 sp_object_hunref(SP_OBJECT(style->filter.filter), style);
3741 style->filter_hreffed = false;
3742 }
3743 style->filter_release_connection.disconnect();
3744 style->filter_modified_connection.disconnect();
3746 style->filter.filter = NULL;
3747 }
3750 // FIXME: Everything below this line belongs in a different file - css-chemistry?
3752 void
3753 sp_style_set_property_url (SPObject *item, gchar const *property, SPObject *linked, bool recursive)
3754 {
3755 Inkscape::XML::Node *repr = SP_OBJECT_REPR(item);
3757 if (repr == NULL) return;
3759 g_return_if_fail(linked != NULL);
3761 gchar *val = g_strdup_printf("url(#%s)", SP_OBJECT_ID(linked));
3763 SPCSSAttr *css = sp_repr_css_attr_new();
3764 sp_repr_css_set_property(css, property, val);
3765 g_free(val);
3766 if (recursive) {
3767 sp_repr_css_change_recursive(repr, css, "style");
3768 } else {
3769 sp_repr_css_change(repr, css, "style");
3770 }
3771 sp_repr_css_attr_unref(css);
3772 }
3775 /**
3776 * Clear all style property attributes in object.
3777 */
3778 void
3779 sp_style_unset_property_attrs(SPObject *o)
3780 {
3781 if (!o) return;
3783 SPStyle *style = SP_OBJECT_STYLE(o);
3784 if (!style) return;
3786 Inkscape::XML::Node *repr = SP_OBJECT_REPR(o);
3787 if (!repr) return;
3789 if (style->opacity.set) {
3790 repr->setAttribute("opacity", NULL);
3791 }
3792 if (style->color.set) {
3793 repr->setAttribute("color", NULL);
3794 }
3795 if (style->fill.set) {
3796 repr->setAttribute("fill", NULL);
3797 }
3798 if (style->fill_opacity.set) {
3799 repr->setAttribute("fill-opacity", NULL);
3800 }
3801 if (style->fill_rule.set) {
3802 repr->setAttribute("fill-rule", NULL);
3803 }
3804 if (style->stroke.set) {
3805 repr->setAttribute("stroke", NULL);
3806 }
3807 if (style->stroke_width.set) {
3808 repr->setAttribute("stroke-width", NULL);
3809 }
3810 if (style->stroke_linecap.set) {
3811 repr->setAttribute("stroke-linecap", NULL);
3812 }
3813 if (style->stroke_linejoin.set) {
3814 repr->setAttribute("stroke-linejoin", NULL);
3815 }
3816 if (style->marker[SP_MARKER_LOC].set) {
3817 repr->setAttribute("marker", NULL);
3818 }
3819 if (style->marker[SP_MARKER_LOC_START].set) {
3820 repr->setAttribute("marker-start", NULL);
3821 }
3822 if (style->marker[SP_MARKER_LOC_MID].set) {
3823 repr->setAttribute("marker-mid", NULL);
3824 }
3825 if (style->marker[SP_MARKER_LOC_END].set) {
3826 repr->setAttribute("marker-end", NULL);
3827 }
3828 if (style->stroke_opacity.set) {
3829 repr->setAttribute("stroke-opacity", NULL);
3830 }
3831 if (style->stroke_dasharray_set) {
3832 repr->setAttribute("stroke-dasharray", NULL);
3833 }
3834 if (style->stroke_dashoffset_set) {
3835 repr->setAttribute("stroke-dashoffset", NULL);
3836 }
3837 if (style->text_private && style->text->font_family.set) {
3838 repr->setAttribute("font-family", NULL);
3839 }
3840 if (style->text_anchor.set) {
3841 repr->setAttribute("text-anchor", NULL);
3842 }
3843 if (style->writing_mode.set) {
3844 repr->setAttribute("writing_mode", NULL);
3845 }
3846 if (style->filter.set) {
3847 repr->setAttribute("filter", NULL);
3848 }
3849 if (style->enable_background.set) {
3850 repr->setAttribute("enable-background", NULL);
3851 }
3852 }
3854 /**
3855 * \pre style != NULL.
3856 * \pre flags in {IFSET, ALWAYS}.
3857 */
3858 SPCSSAttr *
3859 sp_css_attr_from_style(SPStyle const *const style, guint const flags)
3860 {
3861 g_return_val_if_fail(style != NULL, NULL);
3862 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3863 (flags == SP_STYLE_FLAG_ALWAYS) ),
3864 NULL);
3865 gchar *style_str = sp_style_write_string(style, flags);
3866 SPCSSAttr *css = sp_repr_css_attr_new();
3867 sp_repr_css_attr_add_from_string(css, style_str);
3868 g_free(style_str);
3869 return css;
3870 }
3873 /**
3874 * \pre object != NULL
3875 * \pre flags in {IFSET, ALWAYS}.
3876 */
3877 SPCSSAttr *
3878 sp_css_attr_from_object(SPObject *object, guint const flags)
3879 {
3880 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3881 (flags == SP_STYLE_FLAG_ALWAYS) ),
3882 NULL);
3883 SPStyle const *const style = SP_OBJECT_STYLE(object);
3884 if (style == NULL)
3885 return NULL;
3886 return sp_css_attr_from_style(style, flags);
3887 }
3889 /**
3890 * Unset any text-related properties
3891 */
3892 SPCSSAttr *
3893 sp_css_attr_unset_text(SPCSSAttr *css)
3894 {
3895 sp_repr_css_set_property(css, "font", NULL); // not implemented yet
3896 sp_repr_css_set_property(css, "font-size", NULL);
3897 sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet
3898 sp_repr_css_set_property(css, "font-style", NULL);
3899 sp_repr_css_set_property(css, "font-variant", NULL);
3900 sp_repr_css_set_property(css, "font-weight", NULL);
3901 sp_repr_css_set_property(css, "font-stretch", NULL);
3902 sp_repr_css_set_property(css, "font-family", NULL);
3903 sp_repr_css_set_property(css, "text-indent", NULL);
3904 sp_repr_css_set_property(css, "text-align", NULL);
3905 sp_repr_css_set_property(css, "text-decoration", NULL);
3906 sp_repr_css_set_property(css, "line-height", NULL);
3907 sp_repr_css_set_property(css, "letter-spacing", NULL);
3908 sp_repr_css_set_property(css, "word-spacing", NULL);
3909 sp_repr_css_set_property(css, "text-transform", NULL);
3910 sp_repr_css_set_property(css, "direction", NULL);
3911 sp_repr_css_set_property(css, "block-progression", NULL);
3912 sp_repr_css_set_property(css, "writing-mode", NULL);
3913 sp_repr_css_set_property(css, "text-anchor", NULL);
3914 sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet
3915 sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet
3916 sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet
3917 sp_repr_css_set_property(css, "baseline-shift", NULL); // not implemented yet
3919 return css;
3920 }
3922 bool
3923 is_url(char const *p)
3924 {
3925 if (p == NULL)
3926 return false;
3927 /** \todo
3928 * FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs
3929 * in property values must start with 'url('.
3930 */
3931 return (g_ascii_strncasecmp(p, "url(", 4) == 0);
3932 }
3934 /**
3935 * Unset any properties that contain URI values.
3936 *
3937 * Used for storing style that will be reused across documents when carrying
3938 * the referenced defs is impractical.
3939 */
3940 SPCSSAttr *
3941 sp_css_attr_unset_uris(SPCSSAttr *css)
3942 {
3943 // All properties that may hold <uri> or <paint> according to SVG 1.1
3944 if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL);
3945 if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL);
3946 if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL);
3947 if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL);
3948 if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL);
3949 if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL);
3950 if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL);
3951 if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL);
3952 if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL);
3953 if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL);
3955 return css;
3956 }
3958 /**
3959 * Scale a single-value property.
3960 */
3961 void
3962 sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property,
3963 double ex, bool only_with_units = false)
3964 {
3965 gchar const *w = sp_repr_css_property(css, property, NULL);
3966 if (w) {
3967 gchar *units = NULL;
3968 double wd = g_ascii_strtod(w, &units) * ex;
3969 if (w == units) {// nothing converted, non-numeric value
3970 return;
3971 }
3972 if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) {
3973 // only_with_units, but no units found, so do nothing.
3974 return;
3975 }
3976 Inkscape::CSSOStringStream os;
3977 os << wd << units; // reattach units
3978 sp_repr_css_set_property(css, property, os.str().c_str());
3979 }
3980 }
3982 /**
3983 * Scale a list-of-values property.
3984 */
3985 void
3986 sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex)
3987 {
3988 gchar const *string = sp_repr_css_property(css, property, NULL);
3989 if (string) {
3990 Inkscape::CSSOStringStream os;
3991 gchar **a = g_strsplit(string, ",", 10000);
3992 bool first = true;
3993 for (gchar **i = a; i != NULL; i++) {
3994 gchar *w = *i;
3995 if (w == NULL)
3996 break;
3997 gchar *units = NULL;
3998 double wd = g_ascii_strtod(w, &units) * ex;
3999 if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing
4000 g_strfreev(a);
4001 return;
4002 }
4003 if (!first) {
4004 os << ",";
4005 }
4006 os << wd << units; // reattach units
4007 first = false;
4008 }
4009 sp_repr_css_set_property(css, property, os.str().c_str());
4010 g_strfreev(a);
4011 }
4012 }
4014 /**
4015 * Scale any properties that may hold <length> by ex.
4016 */
4017 SPCSSAttr *
4018 sp_css_attr_scale(SPCSSAttr *css, double ex)
4019 {
4020 sp_css_attr_scale_property_single(css, "baseline-shift", ex);
4021 sp_css_attr_scale_property_single(css, "stroke-width", ex);
4022 sp_css_attr_scale_property_list (css, "stroke-dasharray", ex);
4023 sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex);
4024 sp_css_attr_scale_property_single(css, "font-size", ex);
4025 sp_css_attr_scale_property_single(css, "kerning", ex);
4026 sp_css_attr_scale_property_single(css, "letter-spacing", ex);
4027 sp_css_attr_scale_property_single(css, "word-spacing", ex);
4028 sp_css_attr_scale_property_single(css, "line-height", ex, true);
4030 return css;
4031 }
4034 /**
4035 * Remove quotes and escapes from a string. Returned value must be g_free'd.
4036 * Note: in CSS (in style= and in stylesheets), unquoting and unescaping is done
4037 * by libcroco, our CSS parser, though it adds a new pair of "" quotes for the strings
4038 * it parsed for us. So this function is only used to remove those quotes and for
4039 * presentation attributes, without any unescaping. (XML unescaping
4040 * (& etc) is done by XML parser.)
4041 */
4042 gchar *
4043 attribute_unquote(gchar const *val)
4044 {
4045 if (val) {
4046 if (*val == '\'' || *val == '"') {
4047 int l = strlen(val);
4048 if (l >= 2) {
4049 if ( ( val[0] == '"' && val[l - 1] == '"' ) ||
4050 ( val[0] == '\'' && val[l - 1] == '\'' ) ) {
4051 return (g_strndup (val+1, l-2));
4052 }
4053 }
4054 }
4055 }
4057 return (val? g_strdup (val) : NULL);
4058 }
4060 /**
4061 * Quote and/or escape string for writing to CSS (style=). Returned value must be g_free'd.
4062 */
4063 gchar *
4064 css2_escape_quote(gchar const *val) {
4066 Glib::ustring t;
4067 bool quote = false;
4069 for (gchar const *i = val; *i; i++) {
4070 if (g_ascii_isalnum(*i) || *i=='-' || *i=='_') {
4071 t.push_back(*i);
4072 } else if (*i=='\'') {
4073 t.push_back('\\');
4074 t.push_back(*i);
4075 quote = true;
4076 } else {
4077 t.push_back(*i);
4078 quote = true;
4079 }
4080 if (i == val && !g_ascii_isalpha(*i)) {
4081 quote = true;
4082 }
4083 }
4085 if (quote) { // we use the ' quotes so the result can go to the XML attribute
4086 t.insert(t.begin(), '\'');
4087 t.push_back('\'');
4088 }
4090 return (t.empty() ? NULL : g_strdup (t.c_str()));
4091 }
4093 /*
4094 Local Variables:
4095 mode:c++
4096 c-file-style:"stroustrup"
4097 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
4098 indent-tabs-mode:nil
4099 fill-column:99
4100 End:
4101 */
4102 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :