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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"
28 #include "display/canvas-bpath.h"
29 #include "attributes.h"
30 #include "document.h"
31 #include "extract-uri.h"
32 #include "marker-status.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 namespace Inkscape {
45 /**
46 * Parses a CSS url() specification; temporary hack until
47 * style stuff is redone.
48 * \param string the CSS string to parse
49 * \return a newly-allocated URL string (or NULL); free with g_free()
50 */
51 gchar *parse_css_url(gchar const *string) {
52 if (!string)
53 return NULL;
55 gchar const *iter = string;
56 for ( ; g_ascii_isspace(*iter) ; iter = g_utf8_next_char(iter) );
57 if (strncmp(iter, "url(", 4))
58 return NULL;
59 iter += 4;
61 gchar const end_char = *iter;
62 if ( *iter == '"' || *iter == '\'' ) {
63 iter += 1;
64 }
66 GString *temp = g_string_new(NULL);
67 for ( ; *iter ; iter = g_utf8_next_char(iter) ) {
68 if ( *iter == '(' || *iter == ')' ||
69 *iter == '"' || *iter == '\'' ||
70 g_ascii_isspace(*iter) ||
71 g_ascii_iscntrl(*iter) )
72 {
73 break;
74 }
75 if ( *iter == '\\' ) {
76 iter = g_utf8_next_char(iter);
77 }
78 if ( *iter & (gchar)0x80 ) {
79 break;
80 } else {
81 g_string_append_c(temp, *iter);
82 }
83 }
85 if ( *iter == end_char && end_char != ')' ) {
86 iter = g_utf8_next_char(iter);
87 }
88 gchar *result;
89 if ( *iter == ')' ) {
90 result = temp->str;
91 g_string_free(temp, FALSE);
92 } else {
93 result = NULL;
94 g_string_free(temp, TRUE);
95 }
97 return result;
98 }
100 }
102 #define BMAX 8192
104 class SPStyleEnum;
106 /*#########################
107 ## FORWARD DECLARATIONS
108 #########################*/
109 static void sp_style_clear(SPStyle *style);
111 static void sp_style_merge_property(SPStyle *style, gint id, gchar const *val);
113 static void sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent);
114 static void sp_style_read_dash(SPStyle *style, gchar const *str);
116 static SPTextStyle *sp_text_style_new(void);
117 static void sp_text_style_clear(SPTextStyle *ts);
118 static SPTextStyle *sp_text_style_unref(SPTextStyle *st);
119 static SPTextStyle *sp_text_style_duplicate_unset(SPTextStyle *st);
120 static guint sp_text_style_write(gchar *p, guint len, SPTextStyle const *st, guint flags = SP_STYLE_FLAG_IFSET);
121 static void sp_style_privatize_text(SPStyle *style);
123 static void sp_style_read_ifloat(SPIFloat *val, gchar const *str);
124 static void sp_style_read_iscale24(SPIScale24 *val, gchar const *str);
125 static void sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict, bool can_explicitly_inherit);
126 static void sp_style_read_istring(SPIString *val, gchar const *str);
127 static void sp_style_read_ilength(SPILength *val, gchar const *str);
128 static void sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str);
129 static void sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str);
130 static void sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
131 static void sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
132 static void sp_style_read_ifontsize(SPIFontSize *val, gchar const *str);
134 static void sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr, gchar const *key, SPStyleEnum const *dict, bool can_explicitly_inherit);
135 static void sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key);
136 static void sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key);
137 static void sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key);
139 static gint sp_style_write_ifloat(gchar *p, gint len, gchar const *key, SPIFloat const *val, SPIFloat const *base, guint flags);
140 static gint sp_style_write_iscale24(gchar *p, gint len, gchar const *key, SPIScale24 const *val, SPIScale24 const *base, guint flags);
141 static gint sp_style_write_ienum(gchar *p, gint len, gchar const *key, SPStyleEnum const *dict, SPIEnum const *val, SPIEnum const *base, guint flags);
142 static gint sp_style_write_istring(gchar *p, gint len, gchar const *key, SPIString const *val, SPIString const *base, guint flags);
143 static gint sp_style_write_ilength(gchar *p, gint len, gchar const *key, SPILength const *val, SPILength const *base, guint flags);
144 static gint sp_style_write_ipaint(gchar *b, gint len, gchar const *key, SPIPaint const *paint, SPIPaint const *base, guint flags);
145 static gint sp_style_write_ifontsize(gchar *p, gint len, gchar const *key, SPIFontSize const *val, SPIFontSize const *base, guint flags);
146 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);
147 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);
149 static void css2_unescape_unquote(SPIString *val);
151 static void sp_style_paint_clear(SPStyle *style, SPIPaint *paint, unsigned hunref, unsigned unset);
153 #define SPS_READ_IENUM_IF_UNSET(v,s,d,i) if (!(v)->set) {sp_style_read_ienum((v), (s), (d), (i));}
154 #define SPS_READ_PENUM_IF_UNSET(v,r,k,d,i) if (!(v)->set) {sp_style_read_penum((v), (r), (k), (d), (i));}
156 #define SPS_READ_ILENGTH_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ilength((v), (s));}
157 #define SPS_READ_PLENGTH_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_plength((v), (r), (k));}
159 #define SPS_READ_PFLOAT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfloat((v), (r), (k));}
161 #define SPS_READ_IFONTSIZE_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ifontsize((v), (s));}
162 #define SPS_READ_PFONTSIZE_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfontsize((v), (r), (k));}
164 static void sp_style_merge_from_object_stylesheet(SPStyle *, SPObject const *);
166 struct SPStyleEnum {
167 gchar const *key;
168 gint value;
169 };
171 static SPStyleEnum const enum_fill_rule[] = {
172 {"nonzero", SP_WIND_RULE_NONZERO},
173 {"evenodd", SP_WIND_RULE_EVENODD},
174 {NULL, -1}
175 };
177 static SPStyleEnum const enum_stroke_linecap[] = {
178 {"butt", SP_STROKE_LINECAP_BUTT},
179 {"round", SP_STROKE_LINECAP_ROUND},
180 {"square", SP_STROKE_LINECAP_SQUARE},
181 {NULL, -1}
182 };
184 static SPStyleEnum const enum_stroke_linejoin[] = {
185 {"miter", SP_STROKE_LINEJOIN_MITER},
186 {"round", SP_STROKE_LINEJOIN_ROUND},
187 {"bevel", SP_STROKE_LINEJOIN_BEVEL},
188 {NULL, -1}
189 };
191 static SPStyleEnum const enum_font_style[] = {
192 {"normal", SP_CSS_FONT_STYLE_NORMAL},
193 {"italic", SP_CSS_FONT_STYLE_ITALIC},
194 {"oblique", SP_CSS_FONT_STYLE_OBLIQUE},
195 {NULL, -1}
196 };
198 static SPStyleEnum const enum_font_size[] = {
199 {"xx-small", SP_CSS_FONT_SIZE_XX_SMALL},
200 {"x-small", SP_CSS_FONT_SIZE_X_SMALL},
201 {"small", SP_CSS_FONT_SIZE_SMALL},
202 {"medium", SP_CSS_FONT_SIZE_MEDIUM},
203 {"large", SP_CSS_FONT_SIZE_LARGE},
204 {"x-large", SP_CSS_FONT_SIZE_X_LARGE},
205 {"xx-large", SP_CSS_FONT_SIZE_XX_LARGE},
206 {"smaller", SP_CSS_FONT_SIZE_SMALLER},
207 {"larger", SP_CSS_FONT_SIZE_LARGER},
208 {NULL, -1}
209 };
211 static SPStyleEnum const enum_font_variant[] = {
212 {"normal", SP_CSS_FONT_VARIANT_NORMAL},
213 {"small-caps", SP_CSS_FONT_VARIANT_SMALL_CAPS},
214 {NULL, -1}
215 };
217 static SPStyleEnum const enum_font_weight[] = {
218 {"100", SP_CSS_FONT_WEIGHT_100},
219 {"200", SP_CSS_FONT_WEIGHT_200},
220 {"300", SP_CSS_FONT_WEIGHT_300},
221 {"400", SP_CSS_FONT_WEIGHT_400},
222 {"500", SP_CSS_FONT_WEIGHT_500},
223 {"600", SP_CSS_FONT_WEIGHT_600},
224 {"700", SP_CSS_FONT_WEIGHT_700},
225 {"800", SP_CSS_FONT_WEIGHT_800},
226 {"900", SP_CSS_FONT_WEIGHT_900},
227 {"normal", SP_CSS_FONT_WEIGHT_NORMAL},
228 {"bold", SP_CSS_FONT_WEIGHT_BOLD},
229 {"lighter", SP_CSS_FONT_WEIGHT_LIGHTER},
230 {"bolder", SP_CSS_FONT_WEIGHT_BOLDER},
231 {NULL, -1}
232 };
234 static SPStyleEnum const enum_font_stretch[] = {
235 {"ultra-condensed", SP_CSS_FONT_STRETCH_ULTRA_CONDENSED},
236 {"extra-condensed", SP_CSS_FONT_STRETCH_EXTRA_CONDENSED},
237 {"condensed", SP_CSS_FONT_STRETCH_CONDENSED},
238 {"semi-condensed", SP_CSS_FONT_STRETCH_SEMI_CONDENSED},
239 {"normal", SP_CSS_FONT_STRETCH_NORMAL},
240 {"semi-expanded", SP_CSS_FONT_STRETCH_SEMI_EXPANDED},
241 {"expanded", SP_CSS_FONT_STRETCH_EXPANDED},
242 {"extra-expanded", SP_CSS_FONT_STRETCH_EXTRA_EXPANDED},
243 {"ultra-expanded", SP_CSS_FONT_STRETCH_ULTRA_EXPANDED},
244 {"narrower", SP_CSS_FONT_STRETCH_NARROWER},
245 {"wider", SP_CSS_FONT_STRETCH_WIDER},
246 {NULL, -1}
247 };
249 static SPStyleEnum const enum_text_align[] = {
250 {"start", SP_CSS_TEXT_ALIGN_START},
251 {"end", SP_CSS_TEXT_ALIGN_END},
252 {"left", SP_CSS_TEXT_ALIGN_LEFT},
253 {"right", SP_CSS_TEXT_ALIGN_RIGHT},
254 {"center", SP_CSS_TEXT_ALIGN_CENTER},
255 {"justify", SP_CSS_TEXT_ALIGN_JUSTIFY},
256 {NULL, -1}
257 };
259 static SPStyleEnum const enum_text_transform[] = {
260 {"capitalize", SP_CSS_TEXT_TRANSFORM_CAPITALIZE},
261 {"uppercase", SP_CSS_TEXT_TRANSFORM_UPPERCASE},
262 {"lowercase", SP_CSS_TEXT_TRANSFORM_LOWERCASE},
263 {"none", SP_CSS_TEXT_TRANSFORM_NONE},
264 {NULL, -1}
265 };
267 static SPStyleEnum const enum_text_anchor[] = {
268 {"start", SP_CSS_TEXT_ANCHOR_START},
269 {"middle", SP_CSS_TEXT_ANCHOR_MIDDLE},
270 {"end", SP_CSS_TEXT_ANCHOR_END},
271 {NULL, -1}
272 };
274 static SPStyleEnum const enum_direction[] = {
275 {"ltr", SP_CSS_DIRECTION_LTR},
276 {"rtl", SP_CSS_DIRECTION_RTL},
277 {NULL, -1}
278 };
280 static SPStyleEnum const enum_block_progression[] = {
281 {"tb", SP_CSS_BLOCK_PROGRESSION_TB},
282 {"rl", SP_CSS_BLOCK_PROGRESSION_RL},
283 {"lr", SP_CSS_BLOCK_PROGRESSION_LR},
284 {NULL, -1}
285 };
287 static SPStyleEnum const enum_writing_mode[] = {
288 /* Note that using the same enumerator for lr as lr-tb means we write as lr-tb even if the
289 * input file said lr. We prefer writing lr-tb on the grounds that the spec says the initial
290 * value is lr-tb rather than lr.
291 *
292 * ECMA scripts may be surprised to find tb-rl in DOM if they set the attribute to rl, so
293 * sharing enumerators for different strings may be a bug (once we support ecma script).
294 */
295 {"lr-tb", SP_CSS_WRITING_MODE_LR_TB},
296 {"rl-tb", SP_CSS_WRITING_MODE_RL_TB},
297 {"tb-rl", SP_CSS_WRITING_MODE_TB_RL},
298 {"lr", SP_CSS_WRITING_MODE_LR_TB},
299 {"rl", SP_CSS_WRITING_MODE_RL_TB},
300 {"tb", SP_CSS_WRITING_MODE_TB_RL},
301 {NULL, -1}
302 };
304 static SPStyleEnum const enum_visibility[] = {
305 {"hidden", SP_CSS_VISIBILITY_HIDDEN},
306 {"collapse", SP_CSS_VISIBILITY_COLLAPSE},
307 {"visible", SP_CSS_VISIBILITY_VISIBLE},
308 {NULL, -1}
309 };
311 static SPStyleEnum const enum_overflow[] = {
312 {"visible", SP_CSS_OVERFLOW_VISIBLE},
313 {"hidden", SP_CSS_OVERFLOW_HIDDEN},
314 {"scroll", SP_CSS_OVERFLOW_SCROLL},
315 {"auto", SP_CSS_OVERFLOW_AUTO},
316 {NULL, -1}
317 };
319 static SPStyleEnum const enum_display[] = {
320 {"none", SP_CSS_DISPLAY_NONE},
321 {"inline", SP_CSS_DISPLAY_INLINE},
322 {"block", SP_CSS_DISPLAY_BLOCK},
323 {"list-item", SP_CSS_DISPLAY_LIST_ITEM},
324 {"run-in", SP_CSS_DISPLAY_RUN_IN},
325 {"compact", SP_CSS_DISPLAY_COMPACT},
326 {"marker", SP_CSS_DISPLAY_MARKER},
327 {"table", SP_CSS_DISPLAY_TABLE},
328 {"inline-table", SP_CSS_DISPLAY_INLINE_TABLE},
329 {"table-row-group", SP_CSS_DISPLAY_TABLE_ROW_GROUP},
330 {"table-header-group", SP_CSS_DISPLAY_TABLE_HEADER_GROUP},
331 {"table-footer-group", SP_CSS_DISPLAY_TABLE_FOOTER_GROUP},
332 {"table-row", SP_CSS_DISPLAY_TABLE_ROW},
333 {"table-column-group", SP_CSS_DISPLAY_TABLE_COLUMN_GROUP},
334 {"table-column", SP_CSS_DISPLAY_TABLE_COLUMN},
335 {"table-cell", SP_CSS_DISPLAY_TABLE_CELL},
336 {"table-caption", SP_CSS_DISPLAY_TABLE_CAPTION},
337 {NULL, -1}
338 };
340 static SPStyleEnum const enum_shape_rendering[] = {
341 {"auto", 0},
342 {"optimizeSpeed", 0},
343 {"crispEdges", 0},
344 {"geometricPrecision", 0},
345 {NULL, -1}
346 };
348 static SPStyleEnum const enum_color_rendering[] = {
349 {"auto", 0},
350 {"optimizeSpeed", 0},
351 {"optimizeQuality", 0},
352 {NULL, -1}
353 };
355 static SPStyleEnum const *const enum_image_rendering = enum_color_rendering;
357 static SPStyleEnum const enum_text_rendering[] = {
358 {"auto", 0},
359 {"optimizeSpeed", 0},
360 {"optimizeLegibility", 0},
361 {"geometricPrecision", 0},
362 {NULL, -1}
363 };
365 /**
366 * Release callback.
367 */
368 static void
369 sp_style_object_release(SPObject *object, SPStyle *style)
370 {
371 style->object = NULL;
372 }
377 /**
378 * Returns a new SPStyle object with settings as per sp_style_clear().
379 */
380 SPStyle *
381 sp_style_new()
382 {
383 SPStyle *const style = g_new0(SPStyle, 1);
385 style->refcount = 1;
386 style->object = NULL;
387 style->text = sp_text_style_new();
388 style->text_private = TRUE;
390 sp_style_clear(style);
392 style->cloned = false;
394 style->color_hreffed = false;
395 style->fill_hreffed = false;
396 style->stroke_hreffed = false;
398 style->color_listening = false;
399 style->fill_listening = false;
400 style->stroke_listening = false;
402 return style;
403 }
406 /**
407 * Creates a new SPStyle object, and attaches it to the specified SPObject.
408 */
409 SPStyle *
410 sp_style_new_from_object(SPObject *object)
411 {
412 g_return_val_if_fail(object != NULL, NULL);
413 g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
415 SPStyle *style = sp_style_new();
416 style->object = object;
417 g_signal_connect(G_OBJECT(object), "release", G_CALLBACK(sp_style_object_release), style);
419 if (object && SP_OBJECT_IS_CLONED(object)) {
420 style->cloned = true;
421 }
423 return style;
424 }
427 /**
428 * Increase refcount of style.
429 */
430 SPStyle *
431 sp_style_ref(SPStyle *style)
432 {
433 g_return_val_if_fail(style != NULL, NULL);
434 g_return_val_if_fail(style->refcount > 0, NULL);
436 style->refcount += 1;
438 return style;
439 }
442 /**
443 * Decrease refcount of style with possible destruction.
444 */
445 SPStyle *
446 sp_style_unref(SPStyle *style)
447 {
448 g_return_val_if_fail(style != NULL, NULL);
449 g_return_val_if_fail(style->refcount > 0, NULL);
451 style->refcount -= 1;
453 if (style->refcount < 1) {
454 if (style->object)
455 g_signal_handlers_disconnect_matched(G_OBJECT(style->object),
456 G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style);
457 if (style->text) sp_text_style_unref(style->text);
458 sp_style_paint_clear(style, &style->fill, TRUE, FALSE);
459 sp_style_paint_clear(style, &style->stroke, TRUE, FALSE);
460 g_free(style->stroke_dash.dash);
461 g_free(style);
462 }
464 return NULL;
465 }
467 /**
468 * Reads the various style parameters for an object from repr.
469 */
470 static void
471 sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
472 {
473 g_assert(style != NULL);
474 g_assert(repr != NULL);
475 g_assert(!object || (SP_OBJECT_REPR(object) == repr));
477 sp_style_clear(style);
479 if (object && SP_OBJECT_IS_CLONED(object)) {
480 style->cloned = true;
481 }
483 /* 1. Style itself */
484 gchar const *val = repr->attribute("style");
485 if (val != NULL) {
486 sp_style_merge_from_style_string(style, val);
487 }
489 if (object) {
490 sp_style_merge_from_object_stylesheet(style, object);
491 } else {
492 /** \todo No stylesheet information. Find out under what circumstances
493 * this occurs, and handle accordingly. (If we really wanted to, we
494 * could probably get stylesheets by going through repr->doc.)
495 */
496 }
498 /* 2. Presentation attributes */
499 /* CSS2 */
500 SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true);
501 SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true);
502 SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true);
503 /* Font */
504 SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size");
505 SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true);
506 SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true);
507 SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true);
508 SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true);
509 /* Text (css2 chapter 16) */
510 SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent");
511 SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true);
512 if (!style->text_decoration.set) {
513 val = repr->attribute("text-decoration");
514 if (val) {
515 sp_style_read_itextdecoration(&style->text_decoration, val);
516 }
517 }
518 if (!style->line_height.set) {
519 val = repr->attribute("line-height");
520 if (val) {
521 sp_style_read_ilengthornormal(&style->line_height, val);
522 }
523 }
524 if (!style->letter_spacing.set) {
525 val = repr->attribute("letter-spacing");
526 if (val) {
527 sp_style_read_ilengthornormal(&style->letter_spacing, val);
528 }
529 }
530 if (!style->word_spacing.set) {
531 val = repr->attribute("word-spacing");
532 if (val) {
533 sp_style_read_ilengthornormal(&style->word_spacing, val);
534 }
535 }
536 SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true);
537 SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true);
538 SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true);
540 /* SVG */
541 SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode",
542 enum_writing_mode, true);
543 SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor",
544 enum_text_anchor, true);
546 /* opacity */
547 if (!style->opacity.set) {
548 val = repr->attribute("opacity");
549 if (val) {
550 sp_style_read_iscale24(&style->opacity, val);
551 }
552 }
553 /* color */
554 if (!style->color.set) {
555 val = repr->attribute("color");
556 if (val) {
557 sp_style_read_icolor(&style->color, val, style, ( object
558 ? SP_OBJECT_DOCUMENT(object)
559 : NULL ));
560 }
561 }
562 /* fill */
563 if (!style->fill.set) {
564 val = repr->attribute("fill");
565 if (val) {
566 sp_style_read_ipaint(&style->fill, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
567 }
568 }
569 /* fill-opacity */
570 if (!style->fill_opacity.set) {
571 val = repr->attribute("fill-opacity");
572 if (val) {
573 sp_style_read_iscale24(&style->fill_opacity, val);
574 }
575 }
576 /* fill-rule */
577 SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true);
578 /* stroke */
579 if (!style->stroke.set) {
580 val = repr->attribute("stroke");
581 if (val) {
582 sp_style_read_ipaint(&style->stroke, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
583 }
584 }
585 SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width");
586 SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true);
587 SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true);
588 SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit");
590 /* markers */
591 if (!style->marker[SP_MARKER_LOC].set) {
592 val = repr->attribute("marker");
593 if (val) {
594 sp_style_read_istring(&style->marker[SP_MARKER_LOC], val);
595 }
596 }
597 if (!style->marker[SP_MARKER_LOC_START].set) {
598 val = repr->attribute("marker-start");
599 if (val) {
600 sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val);
601 }
602 }
603 if (!style->marker[SP_MARKER_LOC_MID].set) {
604 val = repr->attribute("marker-mid");
605 if (val) {
606 sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val);
607 }
608 }
609 if (!style->marker[SP_MARKER_LOC_END].set) {
610 val = repr->attribute("marker-end");
611 if (val) {
612 sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val);
613 }
614 }
616 /* stroke-opacity */
617 if (!style->stroke_opacity.set) {
618 val = repr->attribute("stroke-opacity");
619 if (val) {
620 sp_style_read_iscale24(&style->stroke_opacity, val);
621 }
622 }
623 if (!style->stroke_dasharray_set) {
624 val = repr->attribute("stroke-dasharray");
625 if (val) {
626 sp_style_read_dash(style, val);
627 }
628 }
629 if (!style->stroke_dashoffset_set) {
630 /* fixme */
631 val = repr->attribute("stroke-dashoffset");
632 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
633 style->stroke_dashoffset_set = TRUE;
634 } else {
635 style->stroke_dashoffset_set = FALSE;
636 }
637 }
639 /* font-family */
640 if (!style->text_private || !style->text->font_family.set) {
641 val = repr->attribute("font-family");
642 if (val) {
643 if (!style->text_private) sp_style_privatize_text(style);
644 sp_style_read_istring(&style->text->font_family, val);
645 css2_unescape_unquote(&style->text->font_family);
646 }
647 }
649 /* 3. Merge from parent */
650 if (object) {
651 if (object->parent) {
652 sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent));
653 }
654 } else {
655 if (sp_repr_parent(repr)) {
656 /// \todo fixme: This is not the prettiest thing (Lauris)
657 SPStyle *parent = sp_style_new();
658 sp_style_read(parent, NULL, sp_repr_parent(repr));
659 sp_style_merge_from_parent(style, parent);
660 sp_style_unref(parent);
661 }
662 }
663 }
666 /**
667 * Read style properties from object's repr.
668 *
669 * 1. Reset existing object style
670 * 2. Load current effective object style
671 * 3. Load i attributes from immediate parent (which has to be up-to-date)
672 */
673 void
674 sp_style_read_from_object(SPStyle *style, SPObject *object)
675 {
676 g_return_if_fail(style != NULL);
677 g_return_if_fail(object != NULL);
678 g_return_if_fail(SP_IS_OBJECT(object));
680 Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
681 g_return_if_fail(repr != NULL);
683 sp_style_read(style, object, repr);
684 }
687 /**
688 * Read style properties from repr only.
689 */
690 void
691 sp_style_read_from_repr(SPStyle *style, Inkscape::XML::Node *repr)
692 {
693 g_return_if_fail(style != NULL);
694 g_return_if_fail(repr != NULL);
696 sp_style_read(style, NULL, repr);
697 }
701 /**
702 *
703 */
704 static void
705 sp_style_privatize_text(SPStyle *style)
706 {
707 SPTextStyle *text = style->text;
708 style->text = sp_text_style_duplicate_unset(style->text);
709 sp_text_style_unref(text);
710 style->text_private = TRUE;
711 }
714 /**
715 * Merge property into style.
716 *
717 * Should be called in order of highest to lowest precedence.
718 * E.g. for a single style string, call from the last declaration to the first,
719 * as CSS says that later declarations override earlier ones.
720 *
721 * \pre val != NULL.
722 */
723 static void
724 sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
725 {
726 g_return_if_fail(val != NULL);
728 switch (id) {
729 /* CSS2 */
730 /* Font */
731 case SP_PROP_FONT_FAMILY:
732 if (!style->text_private) sp_style_privatize_text(style);
733 if (!style->text->font_family.set) {
734 sp_style_read_istring(&style->text->font_family, val);
735 css2_unescape_unquote(&style->text->font_family);
736 }
737 break;
738 case SP_PROP_FONT_SIZE:
739 SPS_READ_IFONTSIZE_IF_UNSET(&style->font_size, val);
740 break;
741 case SP_PROP_FONT_SIZE_ADJUST:
742 if (strcmp(val, "none") != 0) {
743 g_warning("Unimplemented style property id SP_PROP_FONT_SIZE_ADJUST: value: %s", val);
744 }
745 break;
746 case SP_PROP_FONT_STYLE:
747 SPS_READ_IENUM_IF_UNSET(&style->font_style, val, enum_font_style, true);
748 break;
749 case SP_PROP_FONT_VARIANT:
750 SPS_READ_IENUM_IF_UNSET(&style->font_variant, val, enum_font_variant, true);
751 break;
752 case SP_PROP_FONT_WEIGHT:
753 SPS_READ_IENUM_IF_UNSET(&style->font_weight, val, enum_font_weight, true);
754 break;
755 case SP_PROP_FONT_STRETCH:
756 SPS_READ_IENUM_IF_UNSET(&style->font_stretch, val, enum_font_stretch, true);
757 break;
758 case SP_PROP_FONT:
759 if (!style->text_private) sp_style_privatize_text(style);
760 if (!style->text->font.set) {
761 g_free(style->text->font.value);
762 style->text->font.value = g_strdup(val);
763 style->text->font.set = TRUE;
764 style->text->font.inherit = (val && !strcmp(val, "inherit"));
765 }
766 break;
767 /* Text */
768 case SP_PROP_TEXT_INDENT:
769 SPS_READ_ILENGTH_IF_UNSET(&style->text_indent, val);
770 break;
771 case SP_PROP_TEXT_ALIGN:
772 SPS_READ_IENUM_IF_UNSET(&style->text_align, val, enum_text_align, true);
773 break;
774 case SP_PROP_TEXT_DECORATION:
775 if (!style->text_decoration.set) {
776 sp_style_read_itextdecoration(&style->text_decoration, val);
777 }
778 break;
779 case SP_PROP_LINE_HEIGHT:
780 if (!style->line_height.set) {
781 sp_style_read_ilengthornormal(&style->line_height, val);
782 }
783 break;
784 case SP_PROP_LETTER_SPACING:
785 if (!style->letter_spacing.set) {
786 sp_style_read_ilengthornormal(&style->letter_spacing, val);
787 }
788 break;
789 case SP_PROP_WORD_SPACING:
790 if (!style->word_spacing.set) {
791 sp_style_read_ilengthornormal(&style->word_spacing, val);
792 }
793 break;
794 case SP_PROP_TEXT_TRANSFORM:
795 SPS_READ_IENUM_IF_UNSET(&style->text_transform, val, enum_text_transform, true);
796 break;
797 /* Text (css3) */
798 case SP_PROP_DIRECTION:
799 SPS_READ_IENUM_IF_UNSET(&style->direction, val, enum_direction, true);
800 break;
801 case SP_PROP_BLOCK_PROGRESSION:
802 SPS_READ_IENUM_IF_UNSET(&style->block_progression, val, enum_block_progression, true);
803 break;
804 case SP_PROP_WRITING_MODE:
805 SPS_READ_IENUM_IF_UNSET(&style->writing_mode, val, enum_writing_mode, true);
806 break;
807 case SP_PROP_TEXT_ANCHOR:
808 SPS_READ_IENUM_IF_UNSET(&style->text_anchor, val, enum_text_anchor, true);
809 break;
810 /* Text (unimplemented) */
811 case SP_PROP_TEXT_RENDERING: {
812 /* Ignore the hint. */
813 SPIEnum dummy;
814 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_text_rendering, true);
815 break;
816 }
817 case SP_PROP_ALIGNMENT_BASELINE:
818 g_warning("Unimplemented style property SP_PROP_ALIGNMENT_BASELINE: value: %s", val);
819 break;
820 case SP_PROP_BASELINE_SHIFT:
821 g_warning("Unimplemented style property SP_PROP_BASELINE_SHIFT: value: %s", val);
822 break;
823 case SP_PROP_DOMINANT_BASELINE:
824 g_warning("Unimplemented style property SP_PROP_DOMINANT_BASELINE: value: %s", val);
825 break;
826 case SP_PROP_GLYPH_ORIENTATION_HORIZONTAL:
827 g_warning("Unimplemented style property SP_PROP_ORIENTATION_HORIZONTAL: value: %s", val);
828 break;
829 case SP_PROP_GLYPH_ORIENTATION_VERTICAL:
830 g_warning("Unimplemented style property SP_PROP_ORIENTATION_VERTICAL: value: %s", val);
831 break;
832 case SP_PROP_KERNING:
833 g_warning("Unimplemented style property SP_PROP_KERNING: value: %s", val);
834 break;
835 /* Misc */
836 case SP_PROP_CLIP:
837 g_warning("Unimplemented style property SP_PROP_CLIP: value: %s", val);
838 break;
839 case SP_PROP_COLOR:
840 if (!style->color.set) {
841 sp_style_read_icolor(&style->color, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
842 }
843 break;
844 case SP_PROP_CURSOR:
845 g_warning("Unimplemented style property SP_PROP_CURSOR: value: %s", val);
846 break;
847 case SP_PROP_DISPLAY:
848 SPS_READ_IENUM_IF_UNSET(&style->display, val, enum_display, true);
849 break;
850 case SP_PROP_OVERFLOW:
851 /** \todo
852 * FIXME: not supported properly yet, we just read and write it,
853 * but act as if it is always "display".
854 */
855 SPS_READ_IENUM_IF_UNSET(&style->overflow, val, enum_overflow, true);
856 break;
857 case SP_PROP_VISIBILITY:
858 SPS_READ_IENUM_IF_UNSET(&style->visibility, val, enum_visibility, true);
859 break;
860 /* SVG */
861 /* Clip/Mask */
862 case SP_PROP_CLIP_PATH:
863 g_warning("Unimplemented style property SP_PROP_CLIP_PATH: value: %s", val);
864 break;
865 case SP_PROP_CLIP_RULE:
866 g_warning("Unimplemented style property SP_PROP_CLIP_RULE: value: %s", val);
867 break;
868 case SP_PROP_MASK:
869 g_warning("Unimplemented style property SP_PROP_MASK: value: %s", val);
870 break;
871 case SP_PROP_OPACITY:
872 if (!style->opacity.set) {
873 sp_style_read_iscale24(&style->opacity, val);
874 }
875 break;
876 /* Filter */
877 case SP_PROP_ENABLE_BACKGROUND:
878 g_warning("Unimplemented style property SP_PROP_ENABLE_BACKGROUND: value: %s", val);
879 break;
880 case SP_PROP_FILTER:
881 g_warning("Unimplemented style property SP_PROP_FILTER: value: %s", val);
882 break;
883 case SP_PROP_FLOOD_COLOR:
884 g_warning("Unimplemented style property SP_PROP_FLOOD_COLOR: value: %s", val);
885 break;
886 case SP_PROP_FLOOD_OPACITY:
887 g_warning("Unimplemented style property SP_PROP_FLOOD_OPACITY: value: %s", val);
888 break;
889 case SP_PROP_LIGHTING_COLOR:
890 g_warning("Unimplemented style property SP_PROP_LIGHTING_COLOR: value: %s", val);
891 break;
892 /* Gradient */
893 case SP_PROP_STOP_COLOR:
894 g_warning("Unimplemented style property SP_PROP_STOP_COLOR: value: %s", val);
895 break;
896 case SP_PROP_STOP_OPACITY:
897 g_warning("Unimplemented style property SP_PROP_STOP_OPACITY: value: %s", val);
898 break;
899 /* Interactivity */
900 case SP_PROP_POINTER_EVENTS:
901 g_warning("Unimplemented style property SP_PROP_POINTER_EVENTS: value: %s", val);
902 break;
903 /* Paint */
904 case SP_PROP_COLOR_INTERPOLATION:
905 g_warning("Unimplemented style property SP_PROP_COLOR_INTERPOLATION: value: %s", val);
906 break;
907 case SP_PROP_COLOR_INTERPOLATION_FILTERS:
908 g_warning("Unimplemented style property SP_PROP_INTERPOLATION_FILTERS: value: %s", val);
909 break;
910 case SP_PROP_COLOR_PROFILE:
911 g_warning("Unimplemented style property SP_PROP_COLOR_PROFILE: value: %s", val);
912 break;
913 case SP_PROP_COLOR_RENDERING: {
914 /* Ignore the hint. */
915 SPIEnum dummy;
916 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_color_rendering, true);
917 break;
918 }
919 case SP_PROP_FILL:
920 if (!style->fill.set) {
921 sp_style_read_ipaint(&style->fill, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
922 }
923 break;
924 case SP_PROP_FILL_OPACITY:
925 if (!style->fill_opacity.set) {
926 sp_style_read_iscale24(&style->fill_opacity, val);
927 }
928 break;
929 case SP_PROP_FILL_RULE:
930 if (!style->fill_rule.set) {
931 sp_style_read_ienum(&style->fill_rule, val, enum_fill_rule, true);
932 }
933 break;
934 case SP_PROP_IMAGE_RENDERING: {
935 /* Ignore the hint. */
936 SPIEnum dummy;
937 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_image_rendering, true);
938 break;
939 }
940 case SP_PROP_MARKER:
941 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
942 /* style->marker[SP_MARKER_LOC] = g_quark_from_string(val); */
943 marker_status("Setting SP_PROP_MARKER");
944 if (!style->marker[SP_MARKER_LOC].set) {
945 g_free(style->marker[SP_MARKER_LOC].value);
946 style->marker[SP_MARKER_LOC].value = g_strdup(val);
947 style->marker[SP_MARKER_LOC].set = TRUE;
948 style->marker[SP_MARKER_LOC].inherit = (val && !strcmp(val, "inherit"));
949 }
950 break;
952 case SP_PROP_MARKER_START:
953 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
954 marker_status("Setting SP_PROP_MARKER_START");
955 if (!style->marker[SP_MARKER_LOC_START].set) {
956 g_free(style->marker[SP_MARKER_LOC_START].value);
957 style->marker[SP_MARKER_LOC_START].value = g_strdup(val);
958 style->marker[SP_MARKER_LOC_START].set = TRUE;
959 style->marker[SP_MARKER_LOC_START].inherit = (val && !strcmp(val, "inherit"));
960 }
961 break;
962 case SP_PROP_MARKER_MID:
963 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
964 marker_status("Setting SP_PROP_MARKER_MID");
965 if (!style->marker[SP_MARKER_LOC_MID].set) {
966 g_free(style->marker[SP_MARKER_LOC_MID].value);
967 style->marker[SP_MARKER_LOC_MID].value = g_strdup(val);
968 style->marker[SP_MARKER_LOC_MID].set = TRUE;
969 style->marker[SP_MARKER_LOC_MID].inherit = (val && !strcmp(val, "inherit"));
970 }
971 break;
972 case SP_PROP_MARKER_END:
973 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
974 marker_status("Setting SP_PROP_MARKER_END");
975 if (!style->marker[SP_MARKER_LOC_END].set) {
976 g_free(style->marker[SP_MARKER_LOC_END].value);
977 style->marker[SP_MARKER_LOC_END].value = g_strdup(val);
978 style->marker[SP_MARKER_LOC_END].set = TRUE;
979 style->marker[SP_MARKER_LOC_END].inherit = (val && !strcmp(val, "inherit"));
980 }
981 break;
983 case SP_PROP_SHAPE_RENDERING: {
984 /* Ignore the hint. */
985 SPIEnum dummy;
986 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_shape_rendering, true);
987 break;
988 }
990 case SP_PROP_STROKE:
991 if (!style->stroke.set) {
992 sp_style_read_ipaint(&style->stroke, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
993 }
994 break;
995 case SP_PROP_STROKE_WIDTH:
996 SPS_READ_ILENGTH_IF_UNSET(&style->stroke_width, val);
997 break;
998 case SP_PROP_STROKE_DASHARRAY:
999 if (!style->stroke_dasharray_set) {
1000 sp_style_read_dash(style, val);
1001 }
1002 break;
1003 case SP_PROP_STROKE_DASHOFFSET:
1004 if (!style->stroke_dashoffset_set) {
1005 /* fixme */
1006 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
1007 style->stroke_dashoffset_set = TRUE;
1008 } else {
1009 style->stroke_dashoffset_set = FALSE;
1010 }
1011 }
1012 break;
1013 case SP_PROP_STROKE_LINECAP:
1014 if (!style->stroke_linecap.set) {
1015 sp_style_read_ienum(&style->stroke_linecap, val, enum_stroke_linecap, true);
1016 }
1017 break;
1018 case SP_PROP_STROKE_LINEJOIN:
1019 if (!style->stroke_linejoin.set) {
1020 sp_style_read_ienum(&style->stroke_linejoin, val, enum_stroke_linejoin, true);
1021 }
1022 break;
1023 case SP_PROP_STROKE_MITERLIMIT:
1024 if (!style->stroke_miterlimit.set) {
1025 sp_style_read_ifloat(&style->stroke_miterlimit, val);
1026 }
1027 break;
1028 case SP_PROP_STROKE_OPACITY:
1029 if (!style->stroke_opacity.set) {
1030 sp_style_read_iscale24(&style->stroke_opacity, val);
1031 }
1032 break;
1034 default:
1035 g_warning("Invalid style property id: %d value: %s", id, val);
1036 break;
1037 }
1038 }
1040 static void
1041 sp_style_merge_style_from_decl(SPStyle *const style, CRDeclaration const *const decl)
1042 {
1043 /** \todo Ensure that property is lcased, as per
1044 * http://www.w3.org/TR/REC-CSS2/syndata.html#q4.
1045 * Should probably be done in libcroco.
1046 */
1047 unsigned const prop_idx = sp_attribute_lookup(decl->property->stryng->str);
1048 if (prop_idx != SP_ATTR_INVALID) {
1049 /** \todo
1050 * effic: Test whether the property is already set before trying to
1051 * convert to string. Alternatively, set from CRTerm directly rather
1052 * than converting to string.
1053 */
1054 guchar *const str_value_unsigned = cr_term_to_string(decl->value);
1055 gchar *const str_value = reinterpret_cast<gchar *>(str_value_unsigned);
1056 sp_style_merge_property(style, prop_idx, str_value);
1057 g_free(str_value);
1058 }
1059 }
1061 static void
1062 sp_style_merge_from_props(SPStyle *const style, CRPropList *const props)
1063 {
1064 #if 0 /* forwards */
1065 for (CRPropList const *cur = props; cur; cur = cr_prop_list_get_next(cur)) {
1066 CRDeclaration *decl = NULL;
1067 cr_prop_list_get_decl(cur, &decl);
1068 sp_style_merge_style_from_decl(style, decl);
1069 }
1070 #else /* in reverse order, as we need later declarations to take precedence over earlier ones. */
1071 if (props) {
1072 sp_style_merge_from_props(style, cr_prop_list_get_next(props));
1073 CRDeclaration *decl = NULL;
1074 cr_prop_list_get_decl(props, &decl);
1075 sp_style_merge_style_from_decl(style, decl);
1076 }
1077 #endif
1078 }
1080 /**
1081 * \pre decl_list != NULL
1082 */
1083 static void
1084 sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list)
1085 {
1086 if (decl_list->next) {
1087 sp_style_merge_from_decl_list(style, decl_list->next);
1088 }
1089 sp_style_merge_style_from_decl(style, decl_list);
1090 }
1092 static CRSelEng *
1093 sp_repr_sel_eng()
1094 {
1095 CRSelEng *const ret = cr_sel_eng_new();
1096 cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface);
1098 /** \todo
1099 * Check whether we need to register any pseudo-class handlers.
1100 * libcroco has its own default handlers for first-child and lang.
1101 *
1102 * We probably want handlers for link and arguably visited (though
1103 * inkscape can't visit links at the time of writing). hover etc.
1104 * more useful in inkview than the editor inkscape.
1105 *
1106 * http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that
1107 * the following should be honoured, at least by inkview:
1108 * :hover, :active, :focus, :visited, :link.
1109 */
1111 g_assert(ret);
1112 return ret;
1113 }
1115 static void
1116 sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object)
1117 {
1118 static CRSelEng *sel_eng = NULL;
1119 if (!sel_eng) {
1120 sel_eng = sp_repr_sel_eng();
1121 }
1123 CRPropList *props = NULL;
1124 CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng,
1125 object->document->style_cascade,
1126 object->repr,
1127 &props);
1128 g_return_if_fail(status == CR_OK);
1129 /// \todo Check what errors can occur, and handle them properly.
1130 if (props) {
1131 sp_style_merge_from_props(style, props);
1132 cr_prop_list_destroy(props);
1133 }
1134 }
1136 /**
1137 * Parses a style="..." string and merges it with an existing SPStyle.
1138 */
1139 void
1140 sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p)
1141 {
1142 /*
1143 * Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute:
1144 * ``When CSS styling is used, CSS inline style is specified by including
1145 * semicolon-separated property declarations of the form "name : value"
1146 * within the style attribute''.
1147 *
1148 * That's fairly ambiguous. Is a `value' allowed to contain semicolons?
1149 * Why does it say "including", what else is allowed in the style
1150 * attribute value?
1151 */
1153 CRDeclaration *const decl_list
1154 = cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8);
1155 if (decl_list) {
1156 sp_style_merge_from_decl_list(style, decl_list);
1157 cr_declaration_destroy(decl_list);
1158 }
1159 }
1161 /** Indexed by SP_CSS_FONT_SIZE_blah. */
1162 static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0};
1164 static void
1165 sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent)
1166 {
1167 /* 'font-size' */
1168 if (!child.set || child.inherit) {
1169 /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
1170 child.computed = parent.computed;
1171 } else if (child.type == SP_FONT_SIZE_LITERAL) {
1172 /** \todo
1173 * fixme: SVG and CSS do not specify clearly, whether we should use
1174 * user or screen coordinates (Lauris)
1175 */
1176 if (child.value < SP_CSS_FONT_SIZE_SMALLER) {
1177 child.computed = font_size_table[child.value];
1178 } else if (child.value == SP_CSS_FONT_SIZE_SMALLER) {
1179 child.computed = parent.computed / 1.2;
1180 } else if (child.value == SP_CSS_FONT_SIZE_LARGER) {
1181 child.computed = parent.computed * 1.2;
1182 } else {
1183 /* Illegal value */
1184 }
1185 } else if (child.type == SP_FONT_SIZE_PERCENTAGE) {
1186 /* Unlike most other lengths, percentage for font size is relative to parent computed value
1187 * rather than viewport. */
1188 child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value);
1189 }
1190 }
1192 /**
1193 * Sets computed values in \a style, which may involve inheriting from (or in some other way
1194 * calculating from) corresponding computed values of \a parent.
1195 *
1196 * References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default.
1197 * http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to
1198 * inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise
1199 * about what the computed value is (not obvious for lengths).
1200 *
1201 * \pre \a parent's computed values are already up-to-date.
1202 */
1203 void
1204 sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent)
1205 {
1206 g_return_if_fail(style != NULL);
1208 /** \todo
1209 * fixme: Check for existing callers that might pass null parent.
1210 * This should probably be g_return_if_fail, or else we should make a
1211 * best attempt to set computed values correctly without having a parent
1212 * (i.e., by assuming parent has initial values).
1213 */
1214 if (!parent)
1215 return;
1217 /* CSS2 */
1218 /* Font */
1219 sp_style_merge_font_size_from_parent(style->font_size, parent->font_size);
1221 /* 'font-style' */
1222 if (!style->font_style.set || style->font_style.inherit) {
1223 style->font_style.computed = parent->font_style.computed;
1224 }
1226 /* 'font-variant' */
1227 if (!style->font_variant.set || style->font_variant.inherit) {
1228 style->font_variant.computed = parent->font_variant.computed;
1229 }
1231 /* 'font-weight' */
1232 if (!style->font_weight.set || style->font_weight.inherit) {
1233 style->font_weight.computed = parent->font_weight.computed;
1234 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) {
1235 /** \todo
1236 * fixme: This is unconditional, i.e., happens even if parent not
1237 * present.
1238 */
1239 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
1240 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) {
1241 style->font_weight.computed = SP_CSS_FONT_WEIGHT_700;
1242 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) {
1243 unsigned const parent_val = parent->font_weight.computed;
1244 g_assert(SP_CSS_FONT_WEIGHT_100 == 0);
1245 // strictly, 'bolder' and 'lighter' should go to the next weight
1246 // expressible in the current font family, but that's difficult to
1247 // find out, so jumping by 3 seems an appropriate approximation
1248 style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3
1249 ? (unsigned)SP_CSS_FONT_WEIGHT_100
1250 : parent_val - 3);
1251 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1252 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) {
1253 unsigned const parent_val = parent->font_weight.computed;
1254 g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900);
1255 style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3
1256 ? (unsigned)SP_CSS_FONT_WEIGHT_900
1257 : parent_val + 3);
1258 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1259 }
1261 /* 'font-stretch' */
1262 if (!style->font_stretch.set || style->font_stretch.inherit) {
1263 style->font_stretch.computed = parent->font_stretch.computed;
1264 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) {
1265 unsigned const parent_val = parent->font_stretch.computed;
1266 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED
1267 ? parent_val
1268 : parent_val - 1);
1269 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1270 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) {
1271 unsigned const parent_val = parent->font_stretch.computed;
1272 g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1273 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED
1274 ? parent_val
1275 : parent_val + 1);
1276 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1277 }
1279 /* text (css2) */
1280 if (!style->text_indent.set || style->text_indent.inherit) {
1281 style->text_indent.computed = parent->text_indent.computed;
1282 }
1284 if (!style->text_align.set || style->text_align.inherit) {
1285 style->text_align.computed = parent->text_align.computed;
1286 }
1288 if (!style->text_decoration.set || style->text_decoration.inherit) {
1289 style->text_decoration.underline = parent->text_decoration.underline;
1290 style->text_decoration.overline = parent->text_decoration.overline;
1291 style->text_decoration.line_through = parent->text_decoration.line_through;
1292 style->text_decoration.blink = parent->text_decoration.blink;
1293 }
1295 if (!style->line_height.set || style->line_height.inherit) {
1296 style->line_height.computed = parent->line_height.computed;
1297 style->line_height.normal = parent->line_height.normal;
1298 }
1300 if (!style->letter_spacing.set || style->letter_spacing.inherit) {
1301 style->letter_spacing.computed = parent->letter_spacing.computed;
1302 style->letter_spacing.normal = parent->letter_spacing.normal;
1303 }
1305 if (!style->word_spacing.set || style->word_spacing.inherit) {
1306 style->word_spacing.computed = parent->word_spacing.computed;
1307 style->word_spacing.normal = parent->word_spacing.normal;
1308 }
1310 if (!style->text_transform.set || style->text_transform.inherit) {
1311 style->text_transform.computed = parent->text_transform.computed;
1312 }
1314 if (!style->direction.set || style->direction.inherit) {
1315 style->direction.computed = parent->direction.computed;
1316 }
1318 if (!style->block_progression.set || style->block_progression.inherit) {
1319 style->block_progression.computed = parent->block_progression.computed;
1320 }
1322 if (!style->writing_mode.set || style->writing_mode.inherit) {
1323 style->writing_mode.computed = parent->writing_mode.computed;
1324 }
1326 if (!style->text_anchor.set || style->text_anchor.inherit) {
1327 style->text_anchor.computed = parent->text_anchor.computed;
1328 }
1330 if (style->opacity.inherit) {
1331 style->opacity.value = parent->opacity.value;
1332 }
1334 /* Color */
1335 if (!style->color.set || style->color.inherit) {
1336 sp_style_merge_ipaint(style, &style->color, &parent->color);
1337 }
1339 /* Fill */
1340 if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) {
1341 sp_style_merge_ipaint(style, &style->fill, &parent->fill);
1342 }
1344 if (!style->fill_opacity.set || style->fill_opacity.inherit) {
1345 style->fill_opacity.value = parent->fill_opacity.value;
1346 }
1348 if (!style->fill_rule.set || style->fill_rule.inherit) {
1349 style->fill_rule.computed = parent->fill_rule.computed;
1350 }
1352 /* Stroke */
1353 if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) {
1354 sp_style_merge_ipaint(style, &style->stroke, &parent->stroke);
1355 }
1357 if (!style->stroke_width.set || style->stroke_width.inherit) {
1358 style->stroke_width.computed = parent->stroke_width.computed;
1359 } else {
1360 /* Update computed value for any change in font inherited from parent. */
1361 double const em = style->font_size.computed;
1362 if (style->stroke_width.unit == SP_CSS_UNIT_EM) {
1363 style->stroke_width.computed = style->stroke_width.value * em;
1364 } else if (style->stroke_width.unit == SP_CSS_UNIT_EX) {
1365 double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango.
1366 style->stroke_width.computed = style->stroke_width.value * ex;
1367 }
1368 }
1370 if (!style->stroke_linecap.set || style->stroke_linecap.inherit) {
1371 style->stroke_linecap.computed = parent->stroke_linecap.computed;
1372 }
1374 if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) {
1375 style->stroke_linejoin.computed = parent->stroke_linejoin.computed;
1376 }
1378 if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) {
1379 style->stroke_miterlimit.value = parent->stroke_miterlimit.value;
1380 }
1382 if (!style->stroke_dasharray_set && parent->stroke_dasharray_set) {
1383 /** \todo
1384 * This code looks wrong. Why does the logic differ from the
1385 * above properties? Similarly dashoffset below.
1386 */
1387 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1388 if (style->stroke_dash.n_dash > 0) {
1389 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1390 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1391 }
1392 }
1394 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1395 style->stroke_dash.offset = parent->stroke_dash.offset;
1396 }
1398 if (!style->stroke_opacity.set || style->stroke_opacity.inherit) {
1399 style->stroke_opacity.value = parent->stroke_opacity.value;
1400 }
1402 if (style->text && parent->text) {
1403 if (!style->text->font_family.set || style->text->font_family.inherit) {
1404 g_free(style->text->font_family.value);
1405 style->text->font_family.value = g_strdup(parent->text->font_family.value);
1406 }
1407 }
1409 /* Markers - Free the old value and make copy of the new */
1410 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1411 if (!style->marker[i].set || style->marker[i].inherit) {
1412 g_free(style->marker[i].value);
1413 style->marker[i].value = g_strdup(parent->marker[i].value);
1414 }
1415 }
1416 }
1418 template <typename T>
1419 static void
1420 sp_style_merge_prop_from_dying_parent(T &child, T const &parent)
1421 {
1422 if ( ( !(child.set) || child.inherit )
1423 && parent.set && !(parent.inherit) )
1424 {
1425 child = parent;
1426 }
1427 }
1429 /**
1430 * Copy SPIString from parent to child.
1431 */
1432 static void
1433 sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent)
1434 {
1435 if ( ( !(child.set) || child.inherit )
1436 && parent.set && !(parent.inherit) )
1437 {
1438 g_free(child.value);
1439 child.value = g_strdup(parent.value);
1440 child.set = parent.set;
1441 child.inherit = parent.inherit;
1442 }
1443 }
1445 static void
1446 sp_style_merge_paint_prop_from_dying_parent(SPStyle *style,
1447 SPIPaint &child, SPIPaint const &parent)
1448 {
1449 /** \todo
1450 * I haven't given this much attention. See comments below about
1451 * currentColor, colorProfile, and relative URIs.
1452 */
1453 if (!child.set || child.inherit || child.currentcolor) {
1454 sp_style_merge_ipaint(style, &child, &parent);
1455 child.set = parent.set;
1456 child.inherit = parent.inherit;
1457 }
1458 }
1460 static void
1461 sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent,
1462 unsigned const max_computed_val,
1463 unsigned const smaller_val)
1464 {
1465 /* We assume that min computed val is 0, contiguous up to max_computed_val,
1466 then zero or more other absolute values, then smaller_val then larger_val. */
1467 unsigned const min_computed_val = 0;
1468 unsigned const larger_val = smaller_val + 1;
1469 g_return_if_fail(min_computed_val < max_computed_val);
1470 g_return_if_fail(max_computed_val < smaller_val);
1472 if (parent.set && !parent.inherit) {
1473 if (!child.set || child.inherit) {
1474 child.value = parent.value;
1475 child.set = parent.set; // i.e. true
1476 child.inherit = parent.inherit; // i.e. false
1477 } else if (child.value < smaller_val) {
1478 /* Child has absolute value: leave as is. */
1479 } else if ( ( child.value == smaller_val
1480 && parent.value == larger_val )
1481 || ( parent.value == smaller_val
1482 && child.value == larger_val ) )
1483 {
1484 child.set = false;
1485 /*
1486 * Note that this can result in a change in computed value in the
1487 * rare case that the parent's setting was a no-op (i.e. if the
1488 * parent's parent's computed value was already ultra-condensed or
1489 * ultra-expanded). However, I'd guess that the change is for the
1490 * better: I'd guess that if the properties were specified
1491 * relatively, then the intent is to counteract parent's effect.
1492 * I.e. I believe this is the best code even in that case.
1493 */
1494 } else if (child.value == parent.value) {
1495 /* Leave as is. */
1496 /** \todo
1497 * It's unclear what to do if style and parent specify the same
1498 * relative directive (narrower or wider). We can either convert
1499 * to absolute specification or coalesce to a single relative
1500 * request (of half the strength of the original pair).
1501 *
1502 * Converting to a single level of relative specification is a
1503 * better choice if the newly-unlinked clone is itself cloned to
1504 * other contexts (inheriting different font stretchiness): it
1505 * would preserve the effect that it will be narrower than
1506 * the inherited context in each case. The disadvantage is that
1507 * it will ~certainly affect the computed value of the
1508 * newly-unlinked clone.
1509 */
1510 } else {
1511 unsigned const parent_val = parent.computed;
1512 child.value = ( child.value == smaller_val
1513 ? ( parent_val == min_computed_val
1514 ? parent_val
1515 : parent_val - 1 )
1516 : ( parent_val == max_computed_val
1517 ? parent_val
1518 : parent_val + 1 ) );
1519 g_assert(child.value <= max_computed_val);
1520 child.inherit = false;
1521 g_assert(child.set);
1522 }
1523 }
1524 }
1526 template <typename LengthT>
1527 static void
1528 sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent,
1529 double const parent_child_em_ratio)
1530 {
1531 if ( ( !(child.set) || child.inherit )
1532 && parent.set && !(parent.inherit) )
1533 {
1534 child = parent;
1535 switch (parent.unit) {
1536 case SP_CSS_UNIT_EM:
1537 case SP_CSS_UNIT_EX:
1538 child.value *= parent_child_em_ratio;
1539 /** \todo
1540 * fixme: Have separate ex ratio parameter.
1541 * Get x height from libnrtype or pango.
1542 */
1543 if (!isFinite(child.value)) {
1544 child.value = child.computed;
1545 child.unit = SP_CSS_UNIT_NONE;
1546 }
1547 break;
1549 default:
1550 break;
1551 }
1552 }
1553 }
1555 static double
1556 get_relative_font_size_frac(SPIFontSize const &font_size)
1557 {
1558 switch (font_size.type) {
1559 case SP_FONT_SIZE_LITERAL: {
1560 switch (font_size.value) {
1561 case SP_CSS_FONT_SIZE_SMALLER:
1562 return 5.0 / 6.0;
1564 case SP_CSS_FONT_SIZE_LARGER:
1565 return 6.0 / 5.0;
1567 default:
1568 g_assert_not_reached();
1569 }
1570 }
1572 case SP_FONT_SIZE_PERCENTAGE:
1573 return SP_F8_16_TO_FLOAT(font_size.value);
1575 case SP_FONT_SIZE_LENGTH:
1576 g_assert_not_reached();
1577 }
1578 g_assert_not_reached();
1579 }
1581 /**
1582 * Combine \a style and \a parent style specifications into a single style specification that
1583 * preserves (as much as possible) the effect of the existing \a style being a child of \a parent.
1584 *
1585 * Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being
1586 * unlinked), in which case we copy/adapt property values that are explicitly set in \a parent,
1587 * trying to retain the same visual appearance once the parent is removed. Interesting cases are
1588 * when there is unusual interaction with the parent's value (opacity, display) or when the value
1589 * can be specified as relative to the parent computed value (font-size, font-weight etc.).
1590 *
1591 * Doesn't update computed values of \a style. For correctness, you should subsequently call
1592 * sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a
1593 * style was previously up-to-date wrt \a parent.
1594 *
1595 * \pre \a parent's computed values are already up-to-date.
1596 * (\a style's computed values needn't be up-to-date.)
1597 */
1598 void
1599 sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent)
1600 {
1601 /** \note
1602 * The general rule for each property is as follows:
1603 *
1604 * If style is set to an absolute value, then leave it as is.
1605 *
1606 * Otherwise (i.e. if style has a relative value):
1607 *
1608 * If parent is set to an absolute value, then set style to the computed value.
1609 *
1610 * Otherwise, calculate the combined relative value (e.g. multiplying the two percentages).
1611 */
1613 /* We do font-size first, to ensure that em size is up-to-date. */
1614 /** \todo
1615 * fixme: We'll need to have more font-related things up the top once
1616 * we're getting x-height from pango or libnrtype.
1617 */
1619 /* Some things that allow relative specifications. */
1620 {
1621 /* font-size. Note that we update the computed font-size of style,
1622 to assist in em calculations later in this function. */
1623 if (parent->font_size.set && !parent->font_size.inherit) {
1624 if (!style->font_size.set || style->font_size.inherit) {
1625 /* font_size inherits the computed value, so we can use the parent value
1626 * verbatim. */
1627 style->font_size = parent->font_size;
1628 } else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) {
1629 /* Child already has absolute size (stored in computed value), so do nothing. */
1630 } else if ( style->font_size.type == SP_FONT_SIZE_LITERAL
1631 && style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) {
1632 /* Child already has absolute size, but we ensure that the computed value
1633 is up-to-date. */
1634 unsigned const ix = style->font_size.value;
1635 g_assert(ix < G_N_ELEMENTS(font_size_table));
1636 style->font_size.computed = font_size_table[ix];
1637 } else {
1638 /* Child has relative size. */
1639 double const child_frac(get_relative_font_size_frac(style->font_size));
1640 style->font_size.set = true;
1641 style->font_size.inherit = false;
1642 style->font_size.computed = parent->font_size.computed * child_frac;
1644 if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL
1645 && parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER )
1646 || parent->font_size.type == SP_FONT_SIZE_LENGTH )
1647 {
1648 /* Absolute value. */
1649 style->font_size.type = SP_FONT_SIZE_LENGTH;
1650 /* .value is unused for SP_FONT_SIZE_LENGTH. */
1651 } else {
1652 /* Relative value. */
1653 double const parent_frac(get_relative_font_size_frac(parent->font_size));
1654 style->font_size.type = SP_FONT_SIZE_PERCENTAGE;
1655 style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac);
1656 }
1657 }
1658 }
1660 /* 'font-stretch' */
1661 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch,
1662 parent->font_stretch,
1663 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
1664 SP_CSS_FONT_STRETCH_NARROWER);
1666 /* font-weight */
1667 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight,
1668 parent->font_weight,
1669 SP_CSS_FONT_WEIGHT_900,
1670 SP_CSS_FONT_WEIGHT_LIGHTER);
1671 }
1674 /* Enum values that don't have any relative settings (other than `inherit'). */
1675 {
1676 SPIEnum SPStyle::*const fields[] = {
1677 //nyi: SPStyle::clip_rule,
1678 //nyi: SPStyle::color_interpolation,
1679 //nyi: SPStyle::color_interpolation_filters,
1680 //nyi: SPStyle::color_rendering,
1681 &SPStyle::direction,
1682 &SPStyle::fill_rule,
1683 &SPStyle::font_style,
1684 &SPStyle::font_variant,
1685 //nyi: SPStyle::image_rendering,
1686 //nyi: SPStyle::pointer_events,
1687 //nyi: SPStyle::shape_rendering,
1688 &SPStyle::stroke_linecap,
1689 &SPStyle::stroke_linejoin,
1690 &SPStyle::text_anchor,
1691 //nyi: &SPStyle::text_rendering,
1692 &SPStyle::visibility,
1693 &SPStyle::writing_mode
1694 };
1696 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1697 SPIEnum SPStyle::*const fld = fields[i];
1698 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld);
1699 }
1700 }
1702 /* A few other simple inheritance properties. */
1703 {
1704 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity);
1705 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity);
1706 sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit);
1708 /** \todo
1709 * We currently treat text-decoration as if it were a simple inherited
1710 * property (fixme). This code may need changing once we do the
1711 * special fill/stroke inheritance mentioned by the spec.
1712 */
1713 sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration,
1714 parent->text_decoration);
1716 //nyi: font-size-adjust, // <number> | none | inherit
1717 //nyi: glyph-orientation-horizontal,
1718 //nyi: glyph-orientation-vertical,
1719 }
1721 /* Properties that involve length but are easy in other respects. */
1722 {
1723 /* The difficulty with lengths is that font-relative units need adjusting if the font
1724 * varies between parent & child.
1725 *
1726 * Lengths specified in the existing child can stay as they are: its computed font
1727 * specification should stay unchanged, so em & ex lengths should continue to mean the same
1728 * size.
1729 *
1730 * Lengths specified in the dying parent in em or ex need to be scaled according to the
1731 * ratio of em or ex size between parent & child.
1732 */
1733 double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed;
1735 SPILength SPStyle::*const lfields[] = {
1736 &SPStyle::stroke_width,
1737 &SPStyle::text_indent
1738 };
1739 for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) {
1740 SPILength SPStyle::*fld = lfields[i];
1741 sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld,
1742 parent->*fld,
1743 parent_child_em_ratio);
1744 }
1746 SPILengthOrNormal SPStyle::*const nfields[] = {
1747 &SPStyle::letter_spacing,
1748 &SPStyle::line_height,
1749 &SPStyle::word_spacing
1750 };
1751 for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) {
1752 SPILengthOrNormal SPStyle::*fld = nfields[i];
1753 sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld,
1754 parent->*fld,
1755 parent_child_em_ratio);
1756 }
1758 //nyi: &SPStyle::kerning: length or `auto'
1760 /* fixme: Move stroke-dash and stroke-dash-offset here once they
1761 can accept units. */
1762 }
1764 /* Properties that involve a URI but are easy in other respects. */
1765 {
1766 /** \todo
1767 * Could cause problems if original object was in another document
1768 * and it used a relative URL. (At the time of writing, we don't
1769 * allow hrefs to other documents, so this isn't a problem yet.)
1770 * Paint properties also allow URIs.
1771 */
1772 //nyi: cursor, // may involve change in effect, but we can't do much better
1773 //nyi: color-profile,
1775 // Markers (marker-start, marker-mid, marker-end).
1776 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1777 sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]);
1778 }
1779 }
1781 /* CSS2 */
1782 /* Font */
1784 if (style->text && parent->text) {
1785 sp_style_merge_string_prop_from_dying_parent(style->text->font_family,
1786 parent->text->font_family);
1787 }
1789 /* Properties that don't inherit by default. Most of these need special handling. */
1790 {
1791 /*
1792 * opacity's effect is cumulative; we set the new value to the combined effect. The
1793 * default value for opacity is 1.0, not inherit. (Note that stroke-opacity and
1794 * fill-opacity are quite different from opacity, and don't need any special handling.)
1795 *
1796 * Cases:
1797 * - parent & child were each previously unset, in which case the effective
1798 * opacity value is 1.0, and style should remain unset.
1799 * - parent was previously unset (so computed opacity value of 1.0)
1800 * and child was set to inherit. The merged child should
1801 * get a value of 1.0, and shouldn't inherit (lest the new parent
1802 * has a different opacity value). Given that opacity's default
1803 * value is 1.0 (rather than inherit), we might as well have the
1804 * merged child's opacity be unset.
1805 * - parent was previously unset (so opacity 1.0), and child was set to a number.
1806 * The merged child should retain its existing settings (though it doesn't matter
1807 * if we make it unset if that number was 1.0).
1808 * - parent was inherit and child was unset. Merged child should be set to inherit.
1809 * - parent was inherit and child was inherit. (We can't in general reproduce this
1810 * effect (short of introducing a new group), but setting opacity to inherit is rare.)
1811 * If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged
1812 * child's value should be set to the product of the two, i.e. the square of the
1813 * inherited value, and should not be marked as inherit. (This decision assumes that it
1814 * is more important to retain the effective opacity than to retain the inheriting
1815 * effect, and assumes that the inheriting effect either isn't important enough to create
1816 * a group or isn't common enough to bother maintaining the code to create a group.) If
1817 * the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes
1818 * closer to maintaining the effect.
1819 * - parent was inherit and child was set to a numerical value. If the child's value
1820 * was 1.0, then the merged child should have the same settings as the parent.
1821 * If the child's value was 0, then the merged child should also be set to 0.
1822 * If the child's value was anything else, then we do the same as for the inherit/inherit
1823 * case above: have the merged child set to the product of the two opacities and not
1824 * marked as inherit, for the same reasons as for that case.
1825 * - parent was set to a value, and child was unset. The merged child should have
1826 * parent's settings.
1827 * - parent was set to a value, and child was inherit. The merged child should
1828 * be set to the product, i.e. the square of the parent's value.
1829 * - parent & child are each set to a value. The merged child should be set to the
1830 * product.
1831 */
1832 if ( !style->opacity.set
1833 || ( !style->opacity.inherit
1834 && style->opacity.value == SP_SCALE24_MAX ) )
1835 {
1836 style->opacity = parent->opacity;
1837 } else {
1838 /* Ensure that style's computed value is up-to-date. */
1839 if (style->opacity.inherit) {
1840 style->opacity.value = parent->opacity.value;
1841 }
1843 /* Multiplication of opacities occurs even if a child's opacity is set to inherit. */
1844 style->opacity.value = SP_SCALE24_MUL(style->opacity.value,
1845 parent->opacity.value);
1847 style->opacity.inherit = (parent->opacity.inherit
1848 && style->opacity.inherit
1849 && (parent->opacity.value == 0 ||
1850 parent->opacity.value == SP_SCALE24_MAX));
1851 style->opacity.set = ( style->opacity.inherit
1852 || style->opacity.value < SP_SCALE24_MAX );
1853 }
1855 /* display is in principle similar to opacity, but implementation is easier. */
1856 if ( parent->display.set && !parent->display.inherit
1857 && parent->display.value == SP_CSS_DISPLAY_NONE ) {
1858 style->display.value = SP_CSS_DISPLAY_NONE;
1859 style->display.set = true;
1860 style->display.inherit = false;
1861 } else if (style->display.inherit) {
1862 style->display.value = parent->display.value;
1863 style->display.set = parent->display.set;
1864 style->display.inherit = parent->display.inherit;
1865 } else {
1866 /* Leave as is. (display doesn't inherit by default.) */
1867 }
1869 /** \todo
1870 * fixme: Check that we correctly handle all properties that don't
1871 * inherit by default (as shown in
1872 * http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties).
1873 */
1874 }
1876 /* SPIPaint properties (including color). */
1877 {
1878 /** \todo
1879 * Think about the issues involved if specified as currentColor or
1880 * if specified relative to colorProfile, and if the currentColor or
1881 * colorProfile differs between parent \& child. See also comments
1882 * elsewhere in this function about URIs.
1883 */
1884 SPIPaint SPStyle::*const fields[] = {
1885 &SPStyle::color,
1886 &SPStyle::fill,
1887 &SPStyle::stroke
1888 };
1889 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1890 SPIPaint SPStyle::*const fld = fields[i];
1891 sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld);
1892 }
1893 }
1895 /* Things from SVG 1.2 or CSS3. */
1896 {
1897 /* Note: If we ever support setting string values for text-align then we'd need strdup
1898 * handling here. */
1899 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align);
1901 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform);
1902 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression);
1903 }
1905 /* Note: this will need length handling once dasharray supports units. */
1906 if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit )
1907 && parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit )
1908 {
1909 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1910 if (style->stroke_dash.n_dash > 0) {
1911 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1912 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1913 }
1914 style->stroke_dasharray_set = parent->stroke_dasharray_set;
1915 style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit;
1916 }
1918 /* Note: this will need length handling once dasharray_offset supports units. */
1919 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1920 style->stroke_dash.offset = parent->stroke_dash.offset;
1921 style->stroke_dashoffset_set = parent->stroke_dashoffset_set;
1922 /* fixme: we don't currently allow stroke-dashoffset to be `inherit'. TODO: Try to
1923 * represent it as a normal SPILength; though will need to do something about existing
1924 * users of stroke_dash.offset and stroke_dashoffset_set. */
1925 }
1926 }
1930 /**
1931 * Disconnects from possible fill and stroke paint servers.
1932 */
1933 static void
1934 sp_style_paint_server_release(SPPaintServer *server, SPStyle *style)
1935 {
1936 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1937 && (server == style->fill.value.paint.server))
1938 {
1939 sp_style_paint_clear(style, &style->fill, TRUE, FALSE);
1940 }
1942 if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
1943 && (server == style->stroke.value.paint.server))
1944 {
1945 sp_style_paint_clear(style, &style->stroke, TRUE, FALSE);
1946 }
1947 }
1952 /**
1953 * Emit style modified signal on style's object if server is style's fill
1954 * or stroke paint server.
1955 */
1956 static void
1957 sp_style_paint_server_modified(SPPaintServer *server, guint flags, SPStyle *style)
1958 {
1959 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1960 && (server == style->fill.value.paint.server))
1961 {
1962 if (style->object) {
1963 /** \todo
1964 * fixme: I do not know, whether it is optimal - we are
1965 * forcing reread of everything (Lauris)
1966 */
1967 /** \todo
1968 * fixme: We have to use object_modified flag, because parent
1969 * flag is only available downstreams.
1970 */
1971 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1972 }
1973 } else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
1974 && (server == style->stroke.value.paint.server))
1975 {
1976 if (style->object) {
1977 /// \todo fixme:
1978 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1979 }
1980 } else {
1981 g_assert_not_reached();
1982 }
1983 }
1987 /**
1988 *
1989 */
1990 static void
1991 sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
1992 {
1993 sp_style_paint_clear(style, paint, TRUE, FALSE);
1995 if ((paint->set && paint->currentcolor) || parent->currentcolor) {
1996 paint->currentcolor = TRUE;
1997 paint->type = SP_PAINT_TYPE_COLOR;
1998 sp_color_copy(&paint->value.color, &style->color.value.color);
1999 return;
2000 }
2002 paint->type = parent->type;
2003 switch (paint->type) {
2004 case SP_PAINT_TYPE_COLOR:
2005 sp_color_copy(&paint->value.color, &parent->value.color);
2006 break;
2007 case SP_PAINT_TYPE_PAINTSERVER:
2008 paint->value.paint.server = parent->value.paint.server;
2009 paint->value.paint.uri = parent->value.paint.uri;
2010 if (paint->value.paint.server) {
2011 if (style->object && !style->cloned) { // href paintserver for style of non-clones only
2012 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
2013 if (paint == &style->fill) {
2014 style->fill_hreffed = true;
2015 } else if (paint == &style->stroke) {
2016 style->stroke_hreffed = true;
2017 } else if (paint == &style->color) {
2018 style->color_hreffed = true;
2019 }
2020 }
2021 if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
2022 g_signal_connect(G_OBJECT(paint->value.paint.server), "release",
2023 G_CALLBACK(sp_style_paint_server_release), style);
2024 g_signal_connect(G_OBJECT(paint->value.paint.server), "modified",
2025 G_CALLBACK(sp_style_paint_server_modified), style);
2026 if (paint == &style->fill) {
2027 style->fill_listening = true;
2028 } else if (paint == &style->stroke) {
2029 style->stroke_listening = true;
2030 } else if (paint == &style->color) {
2031 style->color_listening = true;
2032 }
2033 }
2034 }
2035 break;
2036 case SP_PAINT_TYPE_NONE:
2037 break;
2038 default:
2039 g_assert_not_reached();
2040 break;
2041 }
2042 }
2045 /**
2046 * Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or
2047 * SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's
2048 * complete cascaded style to style_clipboard. When you need a CSS string
2049 * for an object in the document tree, you normally call
2050 * sp_style_write_difference instead to take into account the object's parent.
2051 *
2052 * \pre style != NULL.
2053 * \pre flags in {IFSET, ALWAYS}.
2054 * \post ret != NULL.
2055 */
2056 gchar *
2057 sp_style_write_string(SPStyle const *const style, guint const flags)
2058 {
2059 /** \todo
2060 * Merge with write_difference, much duplicate code!
2061 */
2062 g_return_val_if_fail(style != NULL, NULL);
2063 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
2064 (flags == SP_STYLE_FLAG_ALWAYS) ),
2065 NULL);
2067 gchar c[BMAX];
2068 gchar *p = c;
2069 *p = '\0';
2071 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags);
2072 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags);
2073 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags);
2074 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags);
2075 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags);
2077 /* Text */
2078 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags);
2079 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags);
2080 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags);
2081 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags);
2082 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags);
2083 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags);
2084 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags);
2085 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags);
2086 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags);
2087 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags);
2089 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags);
2091 /// \todo fixme: Per type methods need default flag too (lauris)
2092 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags);
2093 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags);
2094 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags);
2095 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags);
2096 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags);
2097 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags);
2098 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags);
2099 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags);
2100 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags);
2102 marker_status("sp_style_write_string: Writing markers");
2103 if (style->marker[SP_MARKER_LOC].set) {
2104 p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value);
2105 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2106 p += g_snprintf(p, c + BMAX - p, "marker:none;");
2107 }
2108 if (style->marker[SP_MARKER_LOC_START].set) {
2109 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value);
2110 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2111 p += g_snprintf(p, c + BMAX - p, "marker-start:none;");
2112 }
2113 if (style->marker[SP_MARKER_LOC_MID].set) {
2114 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value);
2115 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2116 p += g_snprintf(p, c + BMAX - p, "marker-mid:none;");
2117 }
2118 if (style->marker[SP_MARKER_LOC_END].set) {
2119 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value);
2120 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2121 p += g_snprintf(p, c + BMAX - p, "marker-end:none;");
2122 }
2124 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags);
2126 /** \todo fixme: */
2127 if ((flags == SP_STYLE_FLAG_ALWAYS)
2128 || style->stroke_dasharray_set)
2129 {
2130 if (style->stroke_dasharray_inherit) {
2131 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2132 } else if (style->stroke_dash.n_dash && style->stroke_dash.dash) {
2133 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2134 gint i;
2135 for (i = 0; i < style->stroke_dash.n_dash; i++) {
2136 Inkscape::CSSOStringStream os;
2137 if (i) {
2138 os << ", ";
2139 }
2140 os << style->stroke_dash.dash[i];
2141 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2142 }
2143 if (p < c + BMAX) {
2144 *p++ = ';';
2145 }
2146 } else {
2147 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;");
2148 }
2149 }
2151 /** \todo fixme: */
2152 if (style->stroke_dashoffset_set) {
2153 Inkscape::CSSOStringStream os;
2154 os << "stroke-dashoffset:" << style->stroke_dash.offset << ";";
2155 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2156 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2157 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;");
2158 }
2160 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags);
2162 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags);
2163 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags);
2164 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags);
2166 /* fixme: */
2167 p += sp_text_style_write(p, c + BMAX - p, style->text, flags);
2169 /* Get rid of trailing `;'. */
2170 if (p != c) {
2171 --p;
2172 if (*p == ';') {
2173 *p = '\0';
2174 }
2175 }
2177 return g_strdup(c);
2178 }
2181 #define STYLE_BUF_MAX
2184 /**
2185 * Dumps style to CSS string, see sp_style_write_string()
2186 *
2187 * \pre from != NULL.
2188 * \pre to != NULL.
2189 * \post ret != NULL.
2190 */
2191 gchar *
2192 sp_style_write_difference(SPStyle const *const from, SPStyle const *const to)
2193 {
2194 g_return_val_if_fail(from != NULL, NULL);
2195 g_return_val_if_fail(to != NULL, NULL);
2197 gchar c[BMAX], *p = c;
2198 *p = '\0';
2200 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF);
2201 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF);
2202 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF);
2203 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF);
2204 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF);
2206 /* Text */
2207 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF);
2208 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF);
2209 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF);
2210 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF);
2211 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF);
2212 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF);
2213 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF);
2214 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF);
2215 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF);
2216 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF);
2218 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF);
2220 /// \todo fixme: Per type methods need default flag too
2221 if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) {
2222 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET);
2223 }
2224 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET);
2225 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF);
2226 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF);
2227 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF);
2228 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF);
2229 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF);
2230 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap,
2231 &from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF);
2232 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin,
2233 &from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF);
2234 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit",
2235 &from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF);
2236 /** \todo fixme: */
2237 if (from->stroke_dasharray_set) {
2238 if (from->stroke_dasharray_inherit) {
2239 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2240 } else if (from->stroke_dash.n_dash && from->stroke_dash.dash) {
2241 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2242 for (gint i = 0; i < from->stroke_dash.n_dash; i++) {
2243 Inkscape::CSSOStringStream os;
2244 if (i) {
2245 os << ", ";
2246 }
2247 os << from->stroke_dash.dash[i];
2248 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2249 }
2250 p += g_snprintf(p, c + BMAX - p, ";");
2251 }
2252 }
2253 /* fixme: */
2254 if (from->stroke_dashoffset_set) {
2255 Inkscape::CSSOStringStream os;
2256 os << "stroke-dashoffset:" << from->stroke_dash.offset << ";";
2257 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2258 }
2259 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF);
2261 /* markers */
2262 marker_status("sp_style_write_difference: Writing markers");
2263 if (from->marker[SP_MARKER_LOC].value != NULL) {
2264 p += g_snprintf(p, c + BMAX - p, "marker:%s;", from->marker[SP_MARKER_LOC].value);
2265 }
2266 if (from->marker[SP_MARKER_LOC_START].value != NULL) {
2267 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value);
2268 }
2269 if (from->marker[SP_MARKER_LOC_MID].value != NULL) {
2270 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value);
2271 }
2272 if (from->marker[SP_MARKER_LOC_END].value != NULL) {
2273 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value);
2274 }
2276 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET);
2277 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET);
2278 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET);
2280 p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF);
2282 /** \todo
2283 * The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF
2284 * flag is mainly only for attributes that don't handle explicit unset well.
2285 * We may need to revisit the behaviour of this routine.
2286 */
2288 /* Get rid of trailing `;'. */
2289 if (p != c) {
2290 --p;
2291 if (*p == ';') {
2292 *p = '\0';
2293 }
2294 }
2296 return g_strdup(c);
2297 }
2301 /**
2302 * Reset all style properties.
2303 */
2304 static void
2305 sp_style_clear(SPStyle *style)
2306 {
2307 g_return_if_fail(style != NULL);
2309 sp_style_paint_clear(style, &style->fill, TRUE, FALSE);
2310 sp_style_paint_clear(style, &style->stroke, TRUE, FALSE);
2311 if (style->stroke_dash.dash) {
2312 g_free(style->stroke_dash.dash);
2313 }
2315 /** \todo fixme: Do that text manipulation via parents */
2316 SPObject *object = style->object;
2317 gint const refcount = style->refcount;
2318 SPTextStyle *text = style->text;
2319 unsigned const text_private = style->text_private;
2320 memset(style, 0, sizeof(SPStyle));
2321 style->refcount = refcount;
2322 style->object = object;
2323 style->text = text;
2324 style->text_private = text_private;
2325 /* fixme: */
2326 style->text->font.set = FALSE;
2327 style->text->font_family.set = FALSE;
2329 style->font_size.set = FALSE;
2330 style->font_size.type = SP_FONT_SIZE_LITERAL;
2331 style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM;
2332 style->font_size.computed = 12.0;
2333 style->font_style.set = FALSE;
2334 style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL;
2335 style->font_variant.set = FALSE;
2336 style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL;
2337 style->font_weight.set = FALSE;
2338 style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL;
2339 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
2340 style->font_stretch.set = FALSE;
2341 style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL;
2343 /* text */
2344 style->text_indent.set = FALSE;
2345 style->text_indent.unit = SP_CSS_UNIT_NONE;
2346 style->text_indent.computed = 0.0;
2348 style->text_align.set = FALSE;
2349 style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START;
2351 style->text_decoration.set = FALSE;
2352 style->text_decoration.underline = FALSE;
2353 style->text_decoration.overline = FALSE;
2354 style->text_decoration.line_through = FALSE;
2355 style->text_decoration.blink = FALSE;
2357 style->line_height.set = FALSE;
2358 style->line_height.unit = SP_CSS_UNIT_PERCENT;
2359 style->line_height.normal = TRUE;
2360 style->line_height.value = style->line_height.computed = 1.0;
2362 style->letter_spacing.set = FALSE;
2363 style->letter_spacing.unit = SP_CSS_UNIT_NONE;
2364 style->letter_spacing.normal = TRUE;
2365 style->letter_spacing.value = style->letter_spacing.computed = 0.0;
2367 style->word_spacing.set = FALSE;
2368 style->word_spacing.unit = SP_CSS_UNIT_NONE;
2369 style->word_spacing.normal = TRUE;
2370 style->word_spacing.value = style->word_spacing.computed = 0.0;
2372 style->text_transform.set = FALSE;
2373 style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE;
2375 style->direction.set = FALSE;
2376 style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR;
2378 style->block_progression.set = FALSE;
2379 style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB;
2381 style->writing_mode.set = FALSE;
2382 style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB;
2385 style->text_anchor.set = FALSE;
2386 style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START;
2389 style->opacity.value = SP_SCALE24_MAX;
2390 style->visibility.set = FALSE;
2391 style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE;
2392 style->display.set = FALSE;
2393 style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE;
2394 style->overflow.set = FALSE;
2395 style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE;
2397 style->color.type = SP_PAINT_TYPE_COLOR;
2398 sp_color_set_rgb_float(&style->color.value.color, 0.0, 0.0, 0.0);
2400 style->fill.type = SP_PAINT_TYPE_COLOR;
2401 sp_color_set_rgb_float(&style->fill.value.color, 0.0, 0.0, 0.0);
2402 style->fill_opacity.value = SP_SCALE24_MAX;
2403 style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO;
2405 style->stroke.type = SP_PAINT_TYPE_NONE;
2406 style->stroke.set = FALSE;
2407 sp_color_set_rgb_float(&style->stroke.value.color, 0.0, 0.0, 0.0);
2408 style->stroke_opacity.value = SP_SCALE24_MAX;
2410 style->stroke_width.set = FALSE;
2411 style->stroke_width.unit = SP_CSS_UNIT_NONE;
2412 style->stroke_width.computed = 1.0;
2414 style->stroke_linecap.set = FALSE;
2415 style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT;
2416 style->stroke_linejoin.set = FALSE;
2417 style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER;
2419 style->stroke_miterlimit.set = FALSE;
2420 style->stroke_miterlimit.value = 4.0;
2422 style->stroke_dash.n_dash = 0;
2423 style->stroke_dash.dash = NULL;
2424 style->stroke_dash.offset = 0.0;
2426 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
2427 g_free(style->marker[i].value);
2428 style->marker[i].set = FALSE;
2429 }
2430 }
2434 /**
2435 *
2436 */
2437 static void
2438 sp_style_read_dash(SPStyle *style, gchar const *str)
2439 {
2440 /* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */
2441 style->stroke_dasharray_set = TRUE;
2443 if (strcmp(str, "inherit") == 0) {
2444 style->stroke_dasharray_inherit = true;
2445 return;
2446 }
2447 style->stroke_dasharray_inherit = false;
2449 NRVpathDash &dash = style->stroke_dash;
2450 g_free(dash.dash);
2451 dash.dash = NULL;
2453 if (strcmp(str, "none") == 0) {
2454 dash.n_dash = 0;
2455 return;
2456 }
2458 gint n_dash = 0;
2459 gdouble d[64];
2460 gchar *e = NULL;
2462 bool LineSolid=true;
2463 while (e != str && n_dash < 64) {
2464 /* TODO: Should allow <length> rather than just a unitless (px) number. */
2465 d[n_dash] = g_ascii_strtod(str, (char **) &e);
2466 if (d[n_dash] > 0.00000001)
2467 LineSolid = false;
2468 if (e != str) {
2469 n_dash += 1;
2470 str = e;
2471 }
2472 while (str && *str && !isalnum(*str)) str += 1;
2473 }
2475 if (LineSolid) {
2476 dash.n_dash = 0;
2477 return;
2478 }
2480 if (n_dash > 0) {
2481 dash.dash = g_new(gdouble, n_dash);
2482 memcpy(dash.dash, d, sizeof(gdouble) * n_dash);
2483 dash.n_dash = n_dash;
2484 }
2485 }
2488 /*#########################
2489 ## SPTextStyle operations
2490 #########################*/
2493 /**
2494 * Return new SPTextStyle object with default settings.
2495 */
2496 static SPTextStyle *
2497 sp_text_style_new()
2498 {
2499 SPTextStyle *ts = g_new0(SPTextStyle, 1);
2500 ts->refcount = 1;
2501 sp_text_style_clear(ts);
2503 ts->font.value = g_strdup("Bitstream Vera Sans");
2504 ts->font_family.value = g_strdup("Bitstream Vera Sans");
2506 return ts;
2507 }
2510 /**
2511 * Clear text style settings.
2512 */
2513 static void
2514 sp_text_style_clear(SPTextStyle *ts)
2515 {
2516 ts->font.set = FALSE;
2517 ts->font_family.set = FALSE;
2518 }
2522 /**
2523 * Reduce refcount of text style and possibly free it.
2524 */
2525 static SPTextStyle *
2526 sp_text_style_unref(SPTextStyle *st)
2527 {
2528 st->refcount -= 1;
2530 if (st->refcount < 1) {
2531 g_free(st->font.value);
2532 g_free(st->font_family.value);
2533 g_free(st);
2534 }
2536 return NULL;
2537 }
2541 /**
2542 * Return duplicate of text style.
2543 */
2544 static SPTextStyle *
2545 sp_text_style_duplicate_unset(SPTextStyle *st)
2546 {
2547 SPTextStyle *nt = g_new0(SPTextStyle, 1);
2548 nt->refcount = 1;
2550 nt->font.value = g_strdup(st->font.value);
2551 nt->font_family.value = g_strdup(st->font_family.value);
2553 return nt;
2554 }
2558 /**
2559 * Write SPTextStyle object into string.
2560 */
2561 static guint
2562 sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags)
2563 {
2564 gint d = 0;
2566 // We do not do diffing for text style
2567 if (flags == SP_STYLE_FLAG_IFDIFF)
2568 flags = SP_STYLE_FLAG_IFSET;
2570 d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags);
2571 return d;
2572 }
2576 /* The following sp_tyle_read_* functions ignore invalid values, as per
2577 * http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors.
2578 *
2579 * [However, the SVG spec is somewhat unclear as to whether the style attribute should
2580 * be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE
2581 * pairs, in which case SVG's error-handling rules
2582 * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.]
2583 */
2586 /**
2587 * Set SPIFloat object from string.
2588 */
2589 static void
2590 sp_style_read_ifloat(SPIFloat *val, gchar const *str)
2591 {
2592 if (!strcmp(str, "inherit")) {
2593 val->set = TRUE;
2594 val->inherit = TRUE;
2595 } else {
2596 gfloat value;
2597 if (sp_svg_number_read_f(str, &value)) {
2598 val->set = TRUE;
2599 val->inherit = FALSE;
2600 val->value = value;
2601 }
2602 }
2603 }
2607 /**
2608 * Set SPIScale24 object from string.
2609 */
2610 static void
2611 sp_style_read_iscale24(SPIScale24 *val, gchar const *str)
2612 {
2613 if (!strcmp(str, "inherit")) {
2614 val->set = TRUE;
2615 val->inherit = TRUE;
2616 } else {
2617 gfloat value;
2618 if (sp_svg_number_read_f(str, &value)) {
2619 val->set = TRUE;
2620 val->inherit = FALSE;
2621 value = CLAMP(value, 0.0f, (gfloat) SP_SCALE24_MAX);
2622 val->value = SP_SCALE24_FROM_FLOAT(value);
2623 }
2624 }
2625 }
2627 /**
2628 * Reads a style value and performs lookup based on the given style value enumerations.
2629 */
2630 static void
2631 sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict,
2632 bool const can_explicitly_inherit)
2633 {
2634 if ( can_explicitly_inherit && !strcmp(str, "inherit") ) {
2635 val->set = TRUE;
2636 val->inherit = TRUE;
2637 } else {
2638 for (unsigned i = 0; dict[i].key; i++) {
2639 if (!strcmp(str, dict[i].key)) {
2640 val->set = TRUE;
2641 val->inherit = FALSE;
2642 val->value = dict[i].value;
2643 /* Save copying for values not needing it */
2644 val->computed = val->value;
2645 break;
2646 }
2647 }
2648 }
2649 }
2653 /**
2654 * Set SPIString object from string.
2655 */
2656 static void
2657 sp_style_read_istring(SPIString *val, gchar const *str)
2658 {
2659 g_free(val->value);
2661 if (!strcmp(str, "inherit")) {
2662 val->set = TRUE;
2663 val->inherit = TRUE;
2664 val->value = NULL;
2665 } else {
2666 val->set = TRUE;
2667 val->inherit = FALSE;
2668 val->value = g_strdup(str);
2669 }
2670 }
2674 /**
2675 * Set SPILength object from string.
2676 */
2677 static void
2678 sp_style_read_ilength(SPILength *val, gchar const *str)
2679 {
2680 if (!strcmp(str, "inherit")) {
2681 val->set = TRUE;
2682 val->inherit = TRUE;
2683 } else {
2684 gdouble value;
2685 gchar *e;
2686 /** \todo fixme: Move this to standard place (Lauris) */
2687 value = g_ascii_strtod(str, &e);
2688 if ((gchar const *) e != str) {
2689 /** \todo
2690 * Allow the number of px per inch to vary (document preferences,
2691 * X server or whatever). E.g. don't fill in computed here, do
2692 * it at the same time as percentage units are done.
2693 */
2694 if (!*e) {
2695 /* Userspace */
2696 val->unit = SP_CSS_UNIT_NONE;
2697 val->computed = value;
2698 } else if (!strcmp(e, "px")) {
2699 /* Userspace */
2700 val->unit = SP_CSS_UNIT_PX;
2701 val->computed = value;
2702 } else if (!strcmp(e, "pt")) {
2703 /* Userspace / DEVICESCALE */
2704 val->unit = SP_CSS_UNIT_PT;
2705 val->computed = value * PX_PER_PT;
2706 } else if (!strcmp(e, "pc")) {
2707 /* 1 pica = 12pt; FIXME: add it to SPUnit */
2708 val->unit = SP_CSS_UNIT_PC;
2709 val->computed = value * PX_PER_PT * 12;
2710 } else if (!strcmp(e, "mm")) {
2711 val->unit = SP_CSS_UNIT_MM;
2712 val->computed = value * PX_PER_MM;
2713 } else if (!strcmp(e, "cm")) {
2714 val->unit = SP_CSS_UNIT_CM;
2715 val->computed = value * PX_PER_CM;
2716 } else if (!strcmp(e, "in")) {
2717 val->unit = SP_CSS_UNIT_IN;
2718 val->computed = value * PX_PER_IN;
2719 } else if (!strcmp(e, "em")) {
2720 /* EM square */
2721 val->unit = SP_CSS_UNIT_EM;
2722 val->value = value;
2723 } else if (!strcmp(e, "ex")) {
2724 /* ex square */
2725 val->unit = SP_CSS_UNIT_EX;
2726 val->value = value;
2727 } else if (!strcmp(e, "%")) {
2728 /* Percentage */
2729 val->unit = SP_CSS_UNIT_PERCENT;
2730 val->value = value * 0.01;
2731 } else {
2732 /* Invalid */
2733 return;
2734 }
2735 val->set = TRUE;
2736 val->inherit = FALSE;
2737 }
2738 }
2739 }
2741 /**
2742 * Set SPILengthOrNormal object from string.
2743 */
2744 static void
2745 sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str)
2746 {
2747 if (!strcmp(str, "normal")) {
2748 val->set = TRUE;
2749 val->inherit = FALSE;
2750 val->normal = TRUE;
2751 val->unit = SP_CSS_UNIT_NONE;
2752 val->value = val->computed = 0.0;
2753 } else {
2754 SPILength length;
2755 sp_style_read_ilength(&length, str);
2756 val->set = length.set;
2757 val->inherit = length.inherit;
2758 val->normal = FALSE;
2759 val->unit = length.unit;
2760 val->value = length.value;
2761 val->computed = length.computed;
2762 }
2763 }
2765 /**
2766 * Set SPITextDecoration object from string.
2767 */
2768 static void
2769 sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str)
2770 {
2771 if (!strcmp(str, "inherit")) {
2772 val->set = TRUE;
2773 val->inherit = TRUE;
2774 } else if (!strcmp(str, "none")) {
2775 val->set = TRUE;
2776 val->inherit = FALSE;
2777 val->underline = FALSE;
2778 val->overline = FALSE;
2779 val->line_through = FALSE;
2780 val->blink = FALSE;
2781 } else {
2782 bool found_underline = false;
2783 bool found_overline = false;
2784 bool found_line_through = false;
2785 bool found_blink = false;
2786 for ( ; *str ; str++ ) {
2787 if (*str == ' ') continue;
2788 if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) {
2789 found_underline = true;
2790 str += 9;
2791 } else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) {
2792 found_overline = true;
2793 str += 8;
2794 } else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) {
2795 found_line_through = true;
2796 str += 12;
2797 } else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) {
2798 found_blink = true;
2799 str += 5;
2800 } else {
2801 return; // invalid value
2802 }
2803 }
2804 if (!(found_underline || found_overline || found_line_through || found_blink)) {
2805 return; // invalid value: empty
2806 }
2807 val->set = TRUE;
2808 val->inherit = FALSE;
2809 val->underline = found_underline;
2810 val->overline = found_overline;
2811 val->line_through = found_line_through;
2812 val->blink = found_blink;
2813 }
2814 }
2816 /**
2817 * Set SPIPaint object from string containing an integer value.
2818 * \param document Ignored
2819 */
2820 static void
2821 sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2822 {
2823 paint->currentcolor = FALSE; /* currentColor not a valid <color>. */
2824 if (!strcmp(str, "inherit")) {
2825 paint->set = TRUE;
2826 paint->inherit = TRUE;
2827 } else {
2828 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
2829 if (rgb0 != 0xff) {
2830 paint->type = SP_PAINT_TYPE_COLOR;
2831 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2832 paint->set = TRUE;
2833 paint->inherit = FALSE;
2834 }
2835 }
2836 }
2839 /**
2840 * Set SPIPaint object from string.
2841 */
2842 static void
2843 sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2844 {
2845 while (isspace(*str)) {
2846 ++str;
2847 }
2849 if (streq(str, "inherit")) {
2850 paint->set = TRUE;
2851 paint->inherit = TRUE;
2852 paint->currentcolor = FALSE;
2853 } else if (streq(str, "currentColor")) {
2854 paint->set = TRUE;
2855 paint->inherit = FALSE;
2856 paint->currentcolor = TRUE;
2857 } else if (streq(str, "none")) {
2858 paint->type = SP_PAINT_TYPE_NONE;
2859 paint->set = TRUE;
2860 paint->inherit = FALSE;
2861 paint->currentcolor = FALSE;
2862 } else if (strneq(str, "url", 3)) {
2863 // this is alloc'd uri, but seems to be shared with a parent
2864 // potentially, so it's not any easy g_free case...
2865 paint->value.paint.uri = extract_uri(str);
2866 if (paint->value.paint.uri == NULL || *(paint->value.paint.uri) == '\0') {
2867 paint->type = SP_PAINT_TYPE_NONE;
2868 return;
2869 }
2870 paint->type = SP_PAINT_TYPE_PAINTSERVER;
2871 paint->set = TRUE;
2872 paint->inherit = FALSE;
2873 paint->currentcolor = FALSE;
2874 if (document) {
2875 SPObject *ps = sp_uri_reference_resolve(document, str);
2876 if (ps && SP_IS_PAINT_SERVER(ps)) {
2877 paint->value.paint.server = SP_PAINT_SERVER(ps);
2878 if (style->object && !style->cloned) {
2879 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
2880 if (paint == &style->fill) {
2881 style->fill_hreffed = true;
2882 } else if (paint == &style->stroke) {
2883 style->stroke_hreffed = true;
2884 } else if (paint == &style->color) {
2885 style->color_hreffed = true;
2886 }
2887 }
2888 if (style->object || style->cloned) {
2889 g_signal_connect(G_OBJECT(paint->value.paint.server), "release",
2890 G_CALLBACK(sp_style_paint_server_release), style);
2891 g_signal_connect(G_OBJECT(paint->value.paint.server), "modified",
2892 G_CALLBACK(sp_style_paint_server_modified), style);
2893 if (paint == &style->fill) {
2894 style->fill_listening = true;
2895 } else if (paint == &style->stroke) {
2896 style->stroke_listening = true;
2897 } else if (paint == &style->color) {
2898 style->color_listening = true;
2899 }
2900 }
2901 } else {
2902 paint->value.paint.server = NULL;
2903 }
2904 }
2905 } else {
2906 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
2907 if (rgb0 != 0xff) {
2908 paint->type = SP_PAINT_TYPE_COLOR;
2909 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2910 paint->set = TRUE;
2911 paint->inherit = FALSE;
2912 paint->currentcolor = FALSE;
2913 }
2914 }
2915 }
2919 /**
2920 * Set SPIFontSize object from string.
2921 */
2922 static void
2923 sp_style_read_ifontsize(SPIFontSize *val, gchar const *str)
2924 {
2925 if (!strcmp(str, "inherit")) {
2926 val->set = TRUE;
2927 val->inherit = TRUE;
2928 } else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) {
2929 for (unsigned i = 0; enum_font_size[i].key; i++) {
2930 if (!strcmp(str, enum_font_size[i].key)) {
2931 val->set = TRUE;
2932 val->inherit = FALSE;
2933 val->type = SP_FONT_SIZE_LITERAL;
2934 val->value = enum_font_size[i].value;
2935 return;
2936 }
2937 }
2938 /* Invalid */
2939 return;
2940 } else {
2941 gdouble value;
2942 gchar *e;
2943 /* fixme: Move this to standard place (Lauris) */
2944 value = g_ascii_strtod(str, &e);
2945 if ((gchar const *) e != str) {
2946 if (!*e) {
2947 /* Userspace */
2948 } else if (!strcmp(e, "px")) {
2949 /* Userspace */
2950 } else if (!strcmp(e, "pt")) {
2951 /* Userspace * DEVICESCALE */
2952 value *= PX_PER_PT;
2953 } else if (!strcmp(e, "pc")) {
2954 /* 12pt */
2955 value *= PX_PER_PT * 12.0;
2956 } else if (!strcmp(e, "mm")) {
2957 value *= PX_PER_MM;
2958 } else if (!strcmp(e, "cm")) {
2959 value *= PX_PER_CM;
2960 } else if (!strcmp(e, "in")) {
2961 value *= PX_PER_IN;
2962 } else if (!strcmp(e, "%")) {
2963 /* Percentage */
2964 val->set = TRUE;
2965 val->inherit = FALSE;
2966 val->type = SP_FONT_SIZE_PERCENTAGE;
2967 val->value = SP_F8_16_FROM_FLOAT(value / 100.0);
2968 return;
2969 } else {
2970 /* Invalid */
2971 return;
2972 }
2973 /* Length */
2974 val->set = TRUE;
2975 val->inherit = FALSE;
2976 val->type = SP_FONT_SIZE_LENGTH;
2977 val->computed = value;
2978 return;
2979 }
2980 }
2981 }
2985 /**
2986 * Set SPIEnum object from repr attribute.
2987 */
2988 static void
2989 sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr,
2990 gchar const *key, SPStyleEnum const *dict,
2991 bool const can_explicitly_inherit)
2992 {
2993 gchar const *str = repr->attribute(key);
2994 if (str) {
2995 sp_style_read_ienum(val, str, dict, can_explicitly_inherit);
2996 }
2997 }
3001 /**
3002 * Set SPILength object from repr attribute.
3003 */
3004 static void
3005 sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key)
3006 {
3007 gchar const *str = repr->attribute(key);
3008 if (str) {
3009 sp_style_read_ilength(val, str);
3010 }
3011 }
3013 /**
3014 * Set SPIFontSize object from repr attribute.
3015 */
3016 static void
3017 sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key)
3018 {
3019 gchar const *str = repr->attribute(key);
3020 if (str) {
3021 sp_style_read_ifontsize(val, str);
3022 }
3023 }
3026 /**
3027 * Set SPIFloat object from repr attribute.
3028 */
3029 static void
3030 sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key)
3031 {
3032 gchar const *str = repr->attribute(key);
3033 if (str) {
3034 sp_style_read_ifloat(val, str);
3035 }
3036 }
3039 /**
3040 * Write SPIFloat object into string.
3041 */
3042 static gint
3043 sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key,
3044 SPIFloat const *const val, SPIFloat const *const base, guint const flags)
3045 {
3046 Inkscape::CSSOStringStream os;
3048 if ((flags & SP_STYLE_FLAG_ALWAYS)
3049 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3050 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3051 && (!base->set || (val->value != base->value))))
3052 {
3053 if (val->inherit) {
3054 return g_snprintf(p, len, "%s:inherit;", key);
3055 } else {
3056 os << key << ":" << val->value << ";";
3057 return g_strlcpy(p, os.str().c_str(), len);
3058 }
3059 }
3060 return 0;
3061 }
3064 /**
3065 * Write SPIScale24 object into string.
3066 */
3067 static gint
3068 sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key,
3069 SPIScale24 const *const val, SPIScale24 const *const base,
3070 guint const flags)
3071 {
3072 Inkscape::CSSOStringStream os;
3074 if ((flags & SP_STYLE_FLAG_ALWAYS)
3075 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3076 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3077 && (!base->set || (val->value != base->value))))
3078 {
3079 if (val->inherit) {
3080 return g_snprintf(p, len, "%s:inherit;", key);
3081 } else {
3082 os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";";
3083 return g_strlcpy(p, os.str().c_str(), len);
3084 }
3085 }
3086 return 0;
3087 }
3090 /**
3091 * Write SPIEnum object into string.
3092 */
3093 static gint
3094 sp_style_write_ienum(gchar *p, gint const len, gchar const *const key,
3095 SPStyleEnum const *const dict,
3096 SPIEnum const *const val, SPIEnum const *const base, guint const flags)
3097 {
3098 if ((flags & SP_STYLE_FLAG_ALWAYS)
3099 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3100 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3101 && (!base->set || (val->computed != base->computed))))
3102 {
3103 if (val->inherit) {
3104 return g_snprintf(p, len, "%s:inherit;", key);
3105 }
3106 for (unsigned i = 0; dict[i].key; i++) {
3107 if (dict[i].value == static_cast< gint > (val->value) ) {
3108 return g_snprintf(p, len, "%s:%s;", key, dict[i].key);
3109 }
3110 }
3111 }
3112 return 0;
3113 }
3117 /**
3118 * Write SPIString object into string.
3119 */
3120 static gint
3121 sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
3122 SPIString const *const val, SPIString const *const base, guint const flags)
3123 {
3124 if ((flags & SP_STYLE_FLAG_ALWAYS)
3125 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3126 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3127 && (!base->set || strcmp(val->value, base->value))))
3128 {
3129 if (val->inherit) {
3130 return g_snprintf(p, len, "%s:inherit;", key);
3131 } else {
3132 return g_snprintf(p, len, "%s:%s;", key, val->value);
3133 }
3134 }
3135 return 0;
3136 }
3139 /**
3140 *
3141 */
3142 static bool
3143 sp_length_differ(SPILength const *const a, SPILength const *const b)
3144 {
3145 if (a->unit != b->unit) {
3146 if (a->unit == SP_CSS_UNIT_EM) return true;
3147 if (a->unit == SP_CSS_UNIT_EX) return true;
3148 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3149 if (b->unit == SP_CSS_UNIT_EM) return true;
3150 if (b->unit == SP_CSS_UNIT_EX) return true;
3151 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3152 }
3154 return (a->computed != b->computed);
3155 }
3159 /**
3160 * Write SPILength object into string.
3161 */
3162 static gint
3163 sp_style_write_ilength(gchar *p, gint const len, gchar const *const key,
3164 SPILength const *const val, SPILength const *const base, guint const flags)
3165 {
3166 Inkscape::CSSOStringStream os;
3168 if ((flags & SP_STYLE_FLAG_ALWAYS)
3169 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3170 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3171 && (!base->set || sp_length_differ(val, base))))
3172 {
3173 if (val->inherit) {
3174 return g_snprintf(p, len, "%s:inherit;", key);
3175 } else {
3176 switch (val->unit) {
3177 case SP_CSS_UNIT_NONE:
3178 os << key << ":" << val->computed << ";";
3179 return g_strlcpy(p, os.str().c_str(), len);
3180 break;
3181 case SP_CSS_UNIT_PX:
3182 os << key << ":" << val->computed << "px;";
3183 return g_strlcpy(p, os.str().c_str(), len);
3184 break;
3185 case SP_CSS_UNIT_PT:
3186 os << key << ":" << val->computed * PT_PER_PX << "pt;";
3187 return g_strlcpy(p, os.str().c_str(), len);
3188 break;
3189 case SP_CSS_UNIT_PC:
3190 os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;";
3191 return g_strlcpy(p, os.str().c_str(), len);
3192 break;
3193 case SP_CSS_UNIT_MM:
3194 os << key << ":" << val->computed * MM_PER_PX << "mm;";
3195 return g_strlcpy(p, os.str().c_str(), len);
3196 break;
3197 case SP_CSS_UNIT_CM:
3198 os << key << ":" << val->computed * CM_PER_PX << "cm;";
3199 return g_strlcpy(p, os.str().c_str(), len);
3200 break;
3201 case SP_CSS_UNIT_IN:
3202 os << key << ":" << val->computed * IN_PER_PX << "in;";
3203 return g_strlcpy(p, os.str().c_str(), len);
3204 break;
3205 case SP_CSS_UNIT_EM:
3206 os << key << ":" << val->value << "em;";
3207 return g_strlcpy(p, os.str().c_str(), len);
3208 break;
3209 case SP_CSS_UNIT_EX:
3210 os << key << ":" << val->value << "ex;";
3211 return g_strlcpy(p, os.str().c_str(), len);
3212 break;
3213 case SP_CSS_UNIT_PERCENT:
3214 os << key << ":" << (val->value * 100.0) << "%;";
3215 return g_strlcpy(p, os.str().c_str(), len);
3216 break;
3217 default:
3218 /* Invalid */
3219 break;
3220 }
3221 }
3222 }
3223 return 0;
3224 }
3227 /**
3228 *
3229 */
3230 static bool
3231 sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b)
3232 {
3233 if (a->normal != b->normal) return true;
3234 if (a->normal) return false;
3236 if (a->unit != b->unit) {
3237 if (a->unit == SP_CSS_UNIT_EM) return true;
3238 if (a->unit == SP_CSS_UNIT_EX) return true;
3239 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3240 if (b->unit == SP_CSS_UNIT_EM) return true;
3241 if (b->unit == SP_CSS_UNIT_EX) return true;
3242 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3243 }
3245 return (a->computed != b->computed);
3246 }
3248 /**
3249 * Write SPILengthOrNormal object into string.
3250 */
3251 static gint
3252 sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key,
3253 SPILengthOrNormal const *const val,
3254 SPILengthOrNormal const *const base,
3255 guint const flags)
3256 {
3257 if ((flags & SP_STYLE_FLAG_ALWAYS)
3258 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3259 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3260 && (!base->set || sp_lengthornormal_differ(val, base))))
3261 {
3262 if (val->normal) {
3263 return g_snprintf(p, len, "%s:normal;", key);
3264 } else {
3265 SPILength length;
3266 length.set = val->set;
3267 length.inherit = val->inherit;
3268 length.unit = val->unit;
3269 length.value = val->value;
3270 length.computed = val->computed;
3271 return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS);
3272 }
3273 }
3274 return 0;
3275 }
3277 /**
3278 *
3279 */
3280 static bool
3281 sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b)
3282 {
3283 return a->underline != b->underline
3284 || a->overline != b->overline
3285 || a->line_through != b->line_through
3286 || a->blink != b->blink;
3287 }
3289 /**
3290 * Write SPITextDecoration object into string.
3291 */
3292 static gint
3293 sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key,
3294 SPITextDecoration const *const val,
3295 SPITextDecoration 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 || sp_textdecoration_differ(val, base))))
3304 {
3305 if (val->inherit) {
3306 return g_snprintf(p, len, "%s:inherit;", key);
3307 } else {
3308 os << key << ":";
3309 if (val->underline || val->overline || val->line_through || val->blink) {
3310 if (val->underline) os << " underline";
3311 if (val->overline) os << " overline";
3312 if (val->line_through) os << " line-through";
3313 if (val->blink) os << " blink";
3314 } else
3315 os << "none";
3316 os << ";";
3317 return g_strlcpy(p, os.str().c_str(), len);
3318 }
3319 }
3320 return 0;
3321 }
3323 /**
3324 *
3325 */
3326 static bool
3327 sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
3328 {
3329 if (a->type != b->type)
3330 return true;
3331 if (a->type == SP_PAINT_TYPE_COLOR)
3332 return !sp_color_is_equal(&a->value.color, &b->value.color);
3333 if (a->type == SP_PAINT_TYPE_PAINTSERVER)
3334 return (a->value.paint.server != b->value.paint.server);
3335 return false;
3336 }
3340 /**
3341 * Write SPIPaint object into string.
3342 */
3343 static gint
3344 sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
3345 SPIPaint const *const paint, SPIPaint const *const base, guint const flags)
3346 {
3347 if ((flags & SP_STYLE_FLAG_ALWAYS)
3348 || ((flags & SP_STYLE_FLAG_IFSET) && paint->set)
3349 || ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set
3350 && (!base->set || sp_paint_differ(paint, base))))
3351 {
3352 if (paint->inherit) {
3353 return g_snprintf(b, len, "%s:inherit;", key);
3354 } else if (paint->currentcolor) {
3355 return g_snprintf(b, len, "%s:currentColor;", key);
3356 } else {
3357 switch (paint->type) {
3358 case SP_PAINT_TYPE_COLOR: {
3359 char color_buf[8];
3360 sp_svg_write_color(color_buf, sizeof(color_buf), sp_color_get_rgba32_ualpha(&paint->value.color, 0));
3361 return g_snprintf(b, len, "%s:%s;", key, color_buf);
3362 }
3363 case SP_PAINT_TYPE_PAINTSERVER:
3364 return g_snprintf(b, len, "%s:url(%s);", key, paint->value.paint.uri);
3365 default:
3366 break;
3367 }
3368 return g_snprintf(b, len, "%s:none;", key);
3369 }
3370 }
3371 return 0;
3372 }
3375 /**
3376 *
3377 */
3378 static bool
3379 sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b)
3380 {
3381 if (a->type != b->type)
3382 return true;
3383 if (a->type == SP_FONT_SIZE_LENGTH) {
3384 if (a->computed != b->computed)
3385 return true;
3386 } else {
3387 if (a->value != b->value)
3388 return true;
3389 }
3390 return false;
3391 }
3394 /**
3395 * Write SPIFontSize object into string.
3396 */
3397 static gint
3398 sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key,
3399 SPIFontSize const *const val, SPIFontSize const *const base,
3400 guint const flags)
3401 {
3402 if ((flags & SP_STYLE_FLAG_ALWAYS)
3403 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3404 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3405 && (!base->set || sp_fontsize_differ(val, base))))
3406 {
3407 if (val->inherit) {
3408 return g_snprintf(p, len, "%s:inherit;", key);
3409 } else if (val->type == SP_FONT_SIZE_LITERAL) {
3410 for (unsigned i = 0; enum_font_size[i].key; i++) {
3411 if (enum_font_size[i].value == static_cast< gint > (val->value) ) {
3412 return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key);
3413 }
3414 }
3415 } else if (val->type == SP_FONT_SIZE_LENGTH) {
3416 Inkscape::CSSOStringStream os;
3417 os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
3418 return g_strlcpy(p, os.str().c_str(), len);
3419 } else if (val->type == SP_FONT_SIZE_PERCENTAGE) {
3420 Inkscape::CSSOStringStream os;
3421 os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;";
3422 return g_strlcpy(p, os.str().c_str(), len);
3423 }
3424 }
3425 return 0;
3426 }
3429 /**
3430 * Clear paint object; conditionally disconnect style from paintserver.
3431 */
3432 static void
3433 sp_style_paint_clear(SPStyle *style, SPIPaint *paint,
3434 unsigned hunref, unsigned unset)
3435 {
3436 if (hunref && (paint->type == SP_PAINT_TYPE_PAINTSERVER) && paint->value.paint.server) {
3437 if (paint == &style->fill) {
3438 if (style->fill_hreffed) {
3439 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3440 style->fill_hreffed = false;
3441 }
3442 if (style->fill_listening) {
3443 g_signal_handlers_disconnect_matched(G_OBJECT(paint->value.paint.server),
3444 G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style);
3445 style->fill_listening = false;
3446 }
3447 } else if (paint == &style->stroke) {
3448 if (style->stroke_hreffed) {
3449 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3450 style->stroke_hreffed = false;
3451 }
3452 if (style->stroke_listening) {
3453 g_signal_handlers_disconnect_matched(G_OBJECT(paint->value.paint.server),
3454 G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style);
3455 style->stroke_listening = false;
3456 }
3457 } else if (paint == &style->color) {
3458 if (style->color_hreffed) {
3459 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3460 style->color_hreffed = false;
3461 }
3462 if (style->color_listening) {
3463 g_signal_handlers_disconnect_matched(G_OBJECT(paint->value.paint.server),
3464 G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style);
3465 style->color_listening = false;
3466 }
3467 }
3469 paint->value.paint.server = NULL;
3470 paint->value.paint.uri = NULL;
3471 paint->type = SP_PAINT_TYPE_NONE;
3472 }
3474 if (unset) {
3475 paint->set = FALSE;
3476 paint->inherit = FALSE;
3477 }
3478 }
3480 /**
3481 * Clear all style property attributes in object.
3482 */
3483 void
3484 sp_style_unset_property_attrs(SPObject *o)
3485 {
3486 if (!o) return;
3488 SPStyle *style = SP_OBJECT_STYLE(o);
3489 if (!style) return;
3491 Inkscape::XML::Node *repr = SP_OBJECT_REPR(o);
3492 if (!repr) return;
3494 if (style->opacity.set) {
3495 repr->setAttribute("opacity", NULL);
3496 }
3497 if (style->color.set) {
3498 repr->setAttribute("color", NULL);
3499 }
3500 if (style->fill.set) {
3501 repr->setAttribute("fill", NULL);
3502 }
3503 if (style->fill_opacity.set) {
3504 repr->setAttribute("fill-opacity", NULL);
3505 }
3506 if (style->fill_rule.set) {
3507 repr->setAttribute("fill-rule", NULL);
3508 }
3509 if (style->stroke.set) {
3510 repr->setAttribute("stroke", NULL);
3511 }
3512 if (style->stroke_width.set) {
3513 repr->setAttribute("stroke-width", NULL);
3514 }
3515 if (style->stroke_linecap.set) {
3516 repr->setAttribute("stroke-linecap", NULL);
3517 }
3518 if (style->stroke_linejoin.set) {
3519 repr->setAttribute("stroke-linejoin", NULL);
3520 }
3521 if (style->marker[SP_MARKER_LOC].set) {
3522 repr->setAttribute("marker", NULL);
3523 }
3524 if (style->marker[SP_MARKER_LOC_START].set) {
3525 repr->setAttribute("marker-start", NULL);
3526 }
3527 if (style->marker[SP_MARKER_LOC_MID].set) {
3528 repr->setAttribute("marker-mid", NULL);
3529 }
3530 if (style->marker[SP_MARKER_LOC_END].set) {
3531 repr->setAttribute("marker-end", NULL);
3532 }
3533 if (style->stroke_opacity.set) {
3534 repr->setAttribute("stroke-opacity", NULL);
3535 }
3536 if (style->stroke_dasharray_set) {
3537 repr->setAttribute("stroke-dasharray", NULL);
3538 }
3539 if (style->stroke_dashoffset_set) {
3540 repr->setAttribute("stroke-dashoffset", NULL);
3541 }
3542 if (style->text_private && style->text->font_family.set) {
3543 repr->setAttribute("font-family", NULL);
3544 }
3545 if (style->text_anchor.set) {
3546 repr->setAttribute("text-anchor", NULL);
3547 }
3548 if (style->writing_mode.set) {
3549 repr->setAttribute("writing_mode", NULL);
3550 }
3551 }
3553 /**
3554 * \pre style != NULL.
3555 * \pre flags in {IFSET, ALWAYS}.
3556 */
3557 SPCSSAttr *
3558 sp_css_attr_from_style(SPStyle const *const style, guint const flags)
3559 {
3560 g_return_val_if_fail(style != NULL, NULL);
3561 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3562 (flags == SP_STYLE_FLAG_ALWAYS) ),
3563 NULL);
3564 gchar *style_str = sp_style_write_string(style, flags);
3565 SPCSSAttr *css = sp_repr_css_attr_new();
3566 sp_repr_css_attr_add_from_string(css, style_str);
3567 g_free(style_str);
3568 return css;
3569 }
3572 /**
3573 * \pre object != NULL
3574 * \pre flags in {IFSET, ALWAYS}.
3575 */
3576 SPCSSAttr *
3577 sp_css_attr_from_object(SPObject *object, guint const flags)
3578 {
3579 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3580 (flags == SP_STYLE_FLAG_ALWAYS) ),
3581 NULL);
3582 SPStyle const *const style = SP_OBJECT_STYLE(object);
3583 if (style == NULL)
3584 return NULL;
3585 return sp_css_attr_from_style(style, flags);
3586 }
3588 /**
3589 * Unset any text-related properties
3590 */
3591 SPCSSAttr *
3592 sp_css_attr_unset_text(SPCSSAttr *css)
3593 {
3594 sp_repr_css_set_property(css, "font", NULL); // not implemented yet
3595 sp_repr_css_set_property(css, "font-size", NULL);
3596 sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet
3597 sp_repr_css_set_property(css, "font-style", NULL);
3598 sp_repr_css_set_property(css, "font-variant", NULL);
3599 sp_repr_css_set_property(css, "font-weight", NULL);
3600 sp_repr_css_set_property(css, "font-stretch", NULL);
3601 sp_repr_css_set_property(css, "font-family", NULL);
3602 sp_repr_css_set_property(css, "text-indent", NULL);
3603 sp_repr_css_set_property(css, "text-align", NULL);
3604 sp_repr_css_set_property(css, "text-decoration", NULL);
3605 sp_repr_css_set_property(css, "line-height", NULL);
3606 sp_repr_css_set_property(css, "letter-spacing", NULL);
3607 sp_repr_css_set_property(css, "word-spacing", NULL);
3608 sp_repr_css_set_property(css, "text-transform", NULL);
3609 sp_repr_css_set_property(css, "direction", NULL);
3610 sp_repr_css_set_property(css, "block-progression", NULL);
3611 sp_repr_css_set_property(css, "writing-mode", NULL);
3612 sp_repr_css_set_property(css, "text-anchor", NULL);
3613 sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet
3614 sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet
3615 sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet
3616 sp_repr_css_set_property(css, "baseline-shift", NULL); // not implemented yet
3618 return css;
3619 }
3621 bool
3622 is_url(char const *p)
3623 {
3624 if (p == NULL)
3625 return false;
3626 /** \todo
3627 * FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs
3628 * in property values must start with 'url('.
3629 */
3630 return (g_ascii_strncasecmp(p, "url(", 4) == 0);
3631 }
3633 /**
3634 * Unset any properties that contain URI values.
3635 *
3636 * Used for storing style that will be reused across documents when carrying
3637 * the referenced defs is impractical.
3638 */
3639 SPCSSAttr *
3640 sp_css_attr_unset_uris(SPCSSAttr *css)
3641 {
3642 // All properties that may hold <uri> or <paint> according to SVG 1.1
3643 if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL);
3644 if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL);
3645 if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL);
3646 if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL);
3647 if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL);
3648 if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL);
3649 if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL);
3650 if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL);
3651 if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL);
3652 if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL);
3654 return css;
3655 }
3657 /**
3658 * Scale a single-value property.
3659 */
3660 void
3661 sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property,
3662 double ex, bool only_with_units = false)
3663 {
3664 gchar const *w = sp_repr_css_property(css, property, NULL);
3665 if (w) {
3666 gchar *units = NULL;
3667 double wd = g_ascii_strtod(w, &units) * ex;
3668 if (w == units) {// nothing converted, non-numeric value
3669 return;
3670 }
3671 if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) {
3672 // only_with_units, but no units found, so do nothing.
3673 return;
3674 }
3675 Inkscape::CSSOStringStream os;
3676 os << wd << units; // reattach units
3677 sp_repr_css_set_property(css, property, os.str().c_str());
3678 }
3679 }
3681 /**
3682 * Scale a list-of-values property.
3683 */
3684 void
3685 sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex)
3686 {
3687 gchar const *string = sp_repr_css_property(css, property, NULL);
3688 if (string) {
3689 Inkscape::CSSOStringStream os;
3690 gchar **a = g_strsplit(string, ",", 10000);
3691 bool first = true;
3692 for (gchar **i = a; i != NULL; i++) {
3693 gchar *w = *i;
3694 if (w == NULL)
3695 break;
3696 gchar *units = NULL;
3697 double wd = g_ascii_strtod(w, &units) * ex;
3698 if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing
3699 g_strfreev(a);
3700 return;
3701 }
3702 if (!first) {
3703 os << ",";
3704 }
3705 os << wd << units; // reattach units
3706 first = false;
3707 }
3708 sp_repr_css_set_property(css, property, os.str().c_str());
3709 g_strfreev(a);
3710 }
3711 }
3713 /**
3714 * Scale any properties that may hold <length> by ex.
3715 */
3716 SPCSSAttr *
3717 sp_css_attr_scale(SPCSSAttr *css, double ex)
3718 {
3719 sp_css_attr_scale_property_single(css, "baseline-shift", ex);
3720 sp_css_attr_scale_property_single(css, "stroke-width", ex);
3721 sp_css_attr_scale_property_list (css, "stroke-dasharray", ex);
3722 sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex);
3723 sp_css_attr_scale_property_single(css, "font-size", ex);
3724 sp_css_attr_scale_property_single(css, "kerning", ex);
3725 sp_css_attr_scale_property_single(css, "letter-spacing", ex);
3726 sp_css_attr_scale_property_single(css, "word-spacing", ex);
3727 sp_css_attr_scale_property_single(css, "line-height", ex, true);
3729 return css;
3730 }
3733 /**
3734 * Remove quotes from SPIString object value.
3735 *
3736 * \todo FIXME: now used for font family, but perhaps this should apply to
3737 * ALL strings (check CSS spec), in which case this should be part of
3738 * read_istring.
3739 */
3740 static void
3741 css2_unescape_unquote(SPIString *val)
3742 {
3743 if (val->set && val->value && strlen(val->value) >= 2) {
3745 /// \todo unescape all \-escaped chars
3747 int l = strlen(val->value);
3748 if ( ( val->value[0] == '"' && val->value[l - 1] == '"' ) ||
3749 ( val->value[0] == '\'' && val->value[l - 1] == '\'' ) ) {
3750 memcpy(val->value, val->value + 1, l - 2);
3751 val->value[l - 2] = '\0';
3752 }
3753 }
3754 }
3757 /*
3758 Local Variables:
3759 mode:c++
3760 c-file-style:"stroustrup"
3761 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
3762 indent-tabs-mode:nil
3763 fill-column:99
3764 End:
3765 */
3766 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :