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 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;
393 style->hreffed = false;
394 style->listening = false;
396 return style;
397 }
400 /**
401 * Creates a new SPStyle object, and attaches it to the specified SPObject.
402 */
403 SPStyle *
404 sp_style_new_from_object(SPObject *object)
405 {
406 g_return_val_if_fail(object != NULL, NULL);
407 g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
409 SPStyle *style = sp_style_new();
410 style->object = object;
411 g_signal_connect(G_OBJECT(object), "release", G_CALLBACK(sp_style_object_release), style);
413 if (object && SP_OBJECT_IS_CLONED(object)) {
414 style->cloned = true;
415 }
417 return style;
418 }
421 /**
422 * Increase refcount of style.
423 */
424 SPStyle *
425 sp_style_ref(SPStyle *style)
426 {
427 g_return_val_if_fail(style != NULL, NULL);
428 g_return_val_if_fail(style->refcount > 0, NULL);
430 style->refcount += 1;
432 return style;
433 }
436 /**
437 * Decrease refcount of style with possible destruction.
438 */
439 SPStyle *
440 sp_style_unref(SPStyle *style)
441 {
442 g_return_val_if_fail(style != NULL, NULL);
443 g_return_val_if_fail(style->refcount > 0, NULL);
445 style->refcount -= 1;
447 if (style->refcount < 1) {
448 if (style->object)
449 g_signal_handlers_disconnect_matched(G_OBJECT(style->object),
450 G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style);
451 if (style->text) sp_text_style_unref(style->text);
452 sp_style_paint_clear(style, &style->fill, TRUE, FALSE);
453 sp_style_paint_clear(style, &style->stroke, TRUE, FALSE);
454 g_free(style->stroke_dash.dash);
455 g_free(style);
456 }
458 return NULL;
459 }
461 /**
462 * Reads the various style parameters for an object from repr.
463 */
464 static void
465 sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
466 {
467 g_assert(style != NULL);
468 g_assert(repr != NULL);
469 g_assert(!object || (SP_OBJECT_REPR(object) == repr));
471 sp_style_clear(style);
473 if (object && SP_OBJECT_IS_CLONED(object)) {
474 style->cloned = true;
475 }
477 /* 1. Style itself */
478 gchar const *val = repr->attribute("style");
479 if (val != NULL) {
480 sp_style_merge_from_style_string(style, val);
481 }
483 if (object) {
484 sp_style_merge_from_object_stylesheet(style, object);
485 } else {
486 /** \todo No stylesheet information. Find out under what circumstances
487 * this occurs, and handle accordingly. (If we really wanted to, we
488 * could probably get stylesheets by going through repr->doc.)
489 */
490 }
492 /* 2. Presentation attributes */
493 /* CSS2 */
494 SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true);
495 SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true);
496 SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true);
497 /* Font */
498 SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size");
499 SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true);
500 SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true);
501 SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true);
502 SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true);
503 /* Text (css2 chapter 16) */
504 SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent");
505 SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true);
506 if (!style->text_decoration.set) {
507 val = repr->attribute("text-decoration");
508 if (val) {
509 sp_style_read_itextdecoration(&style->text_decoration, val);
510 }
511 }
512 if (!style->line_height.set) {
513 val = repr->attribute("line-height");
514 if (val) {
515 sp_style_read_ilengthornormal(&style->line_height, val);
516 }
517 }
518 if (!style->letter_spacing.set) {
519 val = repr->attribute("letter-spacing");
520 if (val) {
521 sp_style_read_ilengthornormal(&style->letter_spacing, val);
522 }
523 }
524 if (!style->word_spacing.set) {
525 val = repr->attribute("word-spacing");
526 if (val) {
527 sp_style_read_ilengthornormal(&style->word_spacing, val);
528 }
529 }
530 SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true);
531 SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true);
532 SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true);
534 /* SVG */
535 SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode",
536 enum_writing_mode, true);
537 SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor",
538 enum_text_anchor, true);
540 /* opacity */
541 if (!style->opacity.set) {
542 val = repr->attribute("opacity");
543 if (val) {
544 sp_style_read_iscale24(&style->opacity, val);
545 }
546 }
547 /* color */
548 if (!style->color.set) {
549 val = repr->attribute("color");
550 if (val) {
551 sp_style_read_icolor(&style->color, val, style, ( object
552 ? SP_OBJECT_DOCUMENT(object)
553 : NULL ));
554 }
555 }
556 /* fill */
557 if (!style->fill.set) {
558 val = repr->attribute("fill");
559 if (val) {
560 sp_style_read_ipaint(&style->fill, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
561 }
562 }
563 /* fill-opacity */
564 if (!style->fill_opacity.set) {
565 val = repr->attribute("fill-opacity");
566 if (val) {
567 sp_style_read_iscale24(&style->fill_opacity, val);
568 }
569 }
570 /* fill-rule */
571 SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true);
572 /* stroke */
573 if (!style->stroke.set) {
574 val = repr->attribute("stroke");
575 if (val) {
576 sp_style_read_ipaint(&style->stroke, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
577 }
578 }
579 SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width");
580 SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true);
581 SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true);
582 SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit");
584 /* markers */
585 if (!style->marker[SP_MARKER_LOC].set) {
586 val = repr->attribute("marker");
587 if (val) {
588 sp_style_read_istring(&style->marker[SP_MARKER_LOC], val);
589 }
590 }
591 if (!style->marker[SP_MARKER_LOC_START].set) {
592 val = repr->attribute("marker-start");
593 if (val) {
594 sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val);
595 }
596 }
597 if (!style->marker[SP_MARKER_LOC_MID].set) {
598 val = repr->attribute("marker-mid");
599 if (val) {
600 sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val);
601 }
602 }
603 if (!style->marker[SP_MARKER_LOC_END].set) {
604 val = repr->attribute("marker-end");
605 if (val) {
606 sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val);
607 }
608 }
610 /* stroke-opacity */
611 if (!style->stroke_opacity.set) {
612 val = repr->attribute("stroke-opacity");
613 if (val) {
614 sp_style_read_iscale24(&style->stroke_opacity, val);
615 }
616 }
617 if (!style->stroke_dasharray_set) {
618 val = repr->attribute("stroke-dasharray");
619 if (val) {
620 sp_style_read_dash(style, val);
621 }
622 }
623 if (!style->stroke_dashoffset_set) {
624 /* fixme */
625 val = repr->attribute("stroke-dashoffset");
626 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
627 style->stroke_dashoffset_set = TRUE;
628 } else {
629 style->stroke_dashoffset_set = FALSE;
630 }
631 }
633 /* font-family */
634 if (!style->text_private || !style->text->font_family.set) {
635 val = repr->attribute("font-family");
636 if (val) {
637 if (!style->text_private) sp_style_privatize_text(style);
638 sp_style_read_istring(&style->text->font_family, val);
639 css2_unescape_unquote(&style->text->font_family);
640 }
641 }
643 /* 3. Merge from parent */
644 if (object) {
645 if (object->parent) {
646 sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent));
647 }
648 } else {
649 if (sp_repr_parent(repr)) {
650 /// \todo fixme: This is not the prettiest thing (Lauris)
651 SPStyle *parent = sp_style_new();
652 sp_style_read(parent, NULL, sp_repr_parent(repr));
653 sp_style_merge_from_parent(style, parent);
654 sp_style_unref(parent);
655 }
656 }
657 }
660 /**
661 * Read style properties from object's repr.
662 *
663 * 1. Reset existing object style
664 * 2. Load current effective object style
665 * 3. Load i attributes from immediate parent (which has to be up-to-date)
666 */
667 void
668 sp_style_read_from_object(SPStyle *style, SPObject *object)
669 {
670 g_return_if_fail(style != NULL);
671 g_return_if_fail(object != NULL);
672 g_return_if_fail(SP_IS_OBJECT(object));
674 Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
675 g_return_if_fail(repr != NULL);
677 sp_style_read(style, object, repr);
678 }
681 /**
682 * Read style properties from repr only.
683 */
684 void
685 sp_style_read_from_repr(SPStyle *style, Inkscape::XML::Node *repr)
686 {
687 g_return_if_fail(style != NULL);
688 g_return_if_fail(repr != NULL);
690 sp_style_read(style, NULL, repr);
691 }
695 /**
696 *
697 */
698 static void
699 sp_style_privatize_text(SPStyle *style)
700 {
701 SPTextStyle *text = style->text;
702 style->text = sp_text_style_duplicate_unset(style->text);
703 sp_text_style_unref(text);
704 style->text_private = TRUE;
705 }
708 /**
709 * Merge property into style.
710 *
711 * Should be called in order of highest to lowest precedence.
712 * E.g. for a single style string, call from the last declaration to the first,
713 * as CSS says that later declarations override earlier ones.
714 *
715 * \pre val != NULL.
716 */
717 static void
718 sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
719 {
720 g_return_if_fail(val != NULL);
722 switch (id) {
723 /* CSS2 */
724 /* Font */
725 case SP_PROP_FONT_FAMILY:
726 if (!style->text_private) sp_style_privatize_text(style);
727 if (!style->text->font_family.set) {
728 sp_style_read_istring(&style->text->font_family, val);
729 css2_unescape_unquote (&style->text->font_family);
730 }
731 break;
732 case SP_PROP_FONT_SIZE:
733 SPS_READ_IFONTSIZE_IF_UNSET(&style->font_size, val);
734 break;
735 case SP_PROP_FONT_SIZE_ADJUST:
736 if (strcmp(val, "none") != 0) {
737 g_warning("Unimplemented style property id SP_PROP_FONT_SIZE_ADJUST: value: %s", val);
738 }
739 break;
740 case SP_PROP_FONT_STYLE:
741 SPS_READ_IENUM_IF_UNSET(&style->font_style, val, enum_font_style, true);
742 break;
743 case SP_PROP_FONT_VARIANT:
744 SPS_READ_IENUM_IF_UNSET(&style->font_variant, val, enum_font_variant, true);
745 break;
746 case SP_PROP_FONT_WEIGHT:
747 SPS_READ_IENUM_IF_UNSET(&style->font_weight, val, enum_font_weight, true);
748 break;
749 case SP_PROP_FONT_STRETCH:
750 SPS_READ_IENUM_IF_UNSET(&style->font_stretch, val, enum_font_stretch, true);
751 break;
752 case SP_PROP_FONT:
753 if (!style->text_private) sp_style_privatize_text(style);
754 if (!style->text->font.set) {
755 g_free(style->text->font.value);
756 style->text->font.value = g_strdup(val);
757 style->text->font.set = TRUE;
758 style->text->font.inherit = (val && !strcmp(val, "inherit"));
759 }
760 break;
761 /* Text */
762 case SP_PROP_TEXT_INDENT:
763 SPS_READ_ILENGTH_IF_UNSET(&style->text_indent, val);
764 break;
765 case SP_PROP_TEXT_ALIGN:
766 SPS_READ_IENUM_IF_UNSET(&style->text_align, val, enum_text_align, true);
767 break;
768 case SP_PROP_TEXT_DECORATION:
769 if (!style->text_decoration.set) {
770 sp_style_read_itextdecoration(&style->text_decoration, val);
771 }
772 break;
773 case SP_PROP_LINE_HEIGHT:
774 if (!style->line_height.set) {
775 sp_style_read_ilengthornormal(&style->line_height, val);
776 }
777 break;
778 case SP_PROP_LETTER_SPACING:
779 if (!style->letter_spacing.set) {
780 sp_style_read_ilengthornormal(&style->letter_spacing, val);
781 }
782 break;
783 case SP_PROP_WORD_SPACING:
784 if (!style->word_spacing.set) {
785 sp_style_read_ilengthornormal(&style->word_spacing, val);
786 }
787 break;
788 case SP_PROP_TEXT_TRANSFORM:
789 SPS_READ_IENUM_IF_UNSET(&style->text_transform, val, enum_text_transform, true);
790 break;
791 /* Text (css3) */
792 case SP_PROP_DIRECTION:
793 SPS_READ_IENUM_IF_UNSET(&style->direction, val, enum_direction, true);
794 break;
795 case SP_PROP_BLOCK_PROGRESSION:
796 SPS_READ_IENUM_IF_UNSET(&style->block_progression, val, enum_block_progression, true);
797 break;
798 case SP_PROP_WRITING_MODE:
799 SPS_READ_IENUM_IF_UNSET(&style->writing_mode, val, enum_writing_mode, true);
800 break;
801 case SP_PROP_TEXT_ANCHOR:
802 SPS_READ_IENUM_IF_UNSET(&style->text_anchor, val, enum_text_anchor, true);
803 break;
804 /* Text (unimplemented) */
805 case SP_PROP_TEXT_RENDERING: {
806 /* Ignore the hint. */
807 SPIEnum dummy;
808 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_text_rendering, true);
809 break;
810 }
811 case SP_PROP_ALIGNMENT_BASELINE:
812 g_warning("Unimplemented style property SP_PROP_ALIGNMENT_BASELINE: value: %s", val);
813 break;
814 case SP_PROP_BASELINE_SHIFT:
815 g_warning("Unimplemented style property SP_PROP_BASELINE_SHIFT: value: %s", val);
816 break;
817 case SP_PROP_DOMINANT_BASELINE:
818 g_warning("Unimplemented style property SP_PROP_DOMINANT_BASELINE: value: %s", val);
819 break;
820 case SP_PROP_GLYPH_ORIENTATION_HORIZONTAL:
821 g_warning("Unimplemented style property SP_PROP_ORIENTATION_HORIZONTAL: value: %s", val);
822 break;
823 case SP_PROP_GLYPH_ORIENTATION_VERTICAL:
824 g_warning("Unimplemented style property SP_PROP_ORIENTATION_VERTICAL: value: %s", val);
825 break;
826 case SP_PROP_KERNING:
827 g_warning("Unimplemented style property SP_PROP_KERNING: value: %s", val);
828 break;
829 /* Misc */
830 case SP_PROP_CLIP:
831 g_warning("Unimplemented style property SP_PROP_CLIP: value: %s", val);
832 break;
833 case SP_PROP_COLOR:
834 if (!style->color.set) {
835 sp_style_read_icolor(&style->color, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
836 }
837 break;
838 case SP_PROP_CURSOR:
839 g_warning("Unimplemented style property SP_PROP_CURSOR: value: %s", val);
840 break;
841 case SP_PROP_DISPLAY:
842 SPS_READ_IENUM_IF_UNSET(&style->display, val, enum_display, true);
843 break;
844 case SP_PROP_OVERFLOW:
845 /** \todo
846 * FIXME: not supported properly yet, we just read and write it,
847 * but act as if it is always "display".
848 */
849 SPS_READ_IENUM_IF_UNSET(&style->overflow, val, enum_overflow, true);
850 break;
851 case SP_PROP_VISIBILITY:
852 SPS_READ_IENUM_IF_UNSET(&style->visibility, val, enum_visibility, true);
853 break;
854 /* SVG */
855 /* Clip/Mask */
856 case SP_PROP_CLIP_PATH:
857 g_warning("Unimplemented style property SP_PROP_CLIP_PATH: value: %s", val);
858 break;
859 case SP_PROP_CLIP_RULE:
860 g_warning("Unimplemented style property SP_PROP_CLIP_RULE: value: %s", val);
861 break;
862 case SP_PROP_MASK:
863 g_warning("Unimplemented style property SP_PROP_MASK: value: %s", val);
864 break;
865 case SP_PROP_OPACITY:
866 if (!style->opacity.set) {
867 sp_style_read_iscale24(&style->opacity, val);
868 }
869 break;
870 /* Filter */
871 case SP_PROP_ENABLE_BACKGROUND:
872 g_warning("Unimplemented style property SP_PROP_ENABLE_BACKGROUND: value: %s", val);
873 break;
874 case SP_PROP_FILTER:
875 g_warning("Unimplemented style property SP_PROP_FILTER: value: %s", val);
876 break;
877 case SP_PROP_FLOOD_COLOR:
878 g_warning("Unimplemented style property SP_PROP_FLOOD_COLOR: value: %s", val);
879 break;
880 case SP_PROP_FLOOD_OPACITY:
881 g_warning("Unimplemented style property SP_PROP_FLOOD_OPACITY: value: %s", val);
882 break;
883 case SP_PROP_LIGHTING_COLOR:
884 g_warning("Unimplemented style property SP_PROP_LIGHTING_COLOR: value: %s", val);
885 break;
886 /* Gradient */
887 case SP_PROP_STOP_COLOR:
888 g_warning("Unimplemented style property SP_PROP_STOP_COLOR: value: %s", val);
889 break;
890 case SP_PROP_STOP_OPACITY:
891 g_warning("Unimplemented style property SP_PROP_STOP_OPACITY: value: %s", val);
892 break;
893 /* Interactivity */
894 case SP_PROP_POINTER_EVENTS:
895 g_warning("Unimplemented style property SP_PROP_POINTER_EVENTS: value: %s", val);
896 break;
897 /* Paint */
898 case SP_PROP_COLOR_INTERPOLATION:
899 g_warning("Unimplemented style property SP_PROP_COLOR_INTERPOLATION: value: %s", val);
900 break;
901 case SP_PROP_COLOR_INTERPOLATION_FILTERS:
902 g_warning("Unimplemented style property SP_PROP_INTERPOLATION_FILTERS: value: %s", val);
903 break;
904 case SP_PROP_COLOR_PROFILE:
905 g_warning("Unimplemented style property SP_PROP_COLOR_PROFILE: value: %s", val);
906 break;
907 case SP_PROP_COLOR_RENDERING: {
908 /* Ignore the hint. */
909 SPIEnum dummy;
910 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_color_rendering, true);
911 break;
912 }
913 case SP_PROP_FILL:
914 if (!style->fill.set) {
915 sp_style_read_ipaint(&style->fill, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
916 }
917 break;
918 case SP_PROP_FILL_OPACITY:
919 if (!style->fill_opacity.set) {
920 sp_style_read_iscale24(&style->fill_opacity, val);
921 }
922 break;
923 case SP_PROP_FILL_RULE:
924 if (!style->fill_rule.set) {
925 sp_style_read_ienum(&style->fill_rule, val, enum_fill_rule, true);
926 }
927 break;
928 case SP_PROP_IMAGE_RENDERING: {
929 /* Ignore the hint. */
930 SPIEnum dummy;
931 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_image_rendering, true);
932 break;
933 }
934 case SP_PROP_MARKER:
935 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
936 /* style->marker[SP_MARKER_LOC] = g_quark_from_string(val); */
937 marker_status("Setting SP_PROP_MARKER");
938 if (!style->marker[SP_MARKER_LOC].set) {
939 g_free(style->marker[SP_MARKER_LOC].value);
940 style->marker[SP_MARKER_LOC].value = g_strdup(val);
941 style->marker[SP_MARKER_LOC].set = TRUE;
942 style->marker[SP_MARKER_LOC].inherit = (val && !strcmp(val, "inherit"));
943 }
944 break;
946 case SP_PROP_MARKER_START:
947 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
948 marker_status("Setting SP_PROP_MARKER_START");
949 if (!style->marker[SP_MARKER_LOC_START].set) {
950 g_free(style->marker[SP_MARKER_LOC_START].value);
951 style->marker[SP_MARKER_LOC_START].value = g_strdup(val);
952 style->marker[SP_MARKER_LOC_START].set = TRUE;
953 style->marker[SP_MARKER_LOC_START].inherit = (val && !strcmp(val, "inherit"));
954 }
955 break;
956 case SP_PROP_MARKER_MID:
957 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
958 marker_status("Setting SP_PROP_MARKER_MID");
959 if (!style->marker[SP_MARKER_LOC_MID].set) {
960 g_free(style->marker[SP_MARKER_LOC_MID].value);
961 style->marker[SP_MARKER_LOC_MID].value = g_strdup(val);
962 style->marker[SP_MARKER_LOC_MID].set = TRUE;
963 style->marker[SP_MARKER_LOC_MID].inherit = (val && !strcmp(val, "inherit"));
964 }
965 break;
966 case SP_PROP_MARKER_END:
967 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
968 marker_status("Setting SP_PROP_MARKER_END");
969 if (!style->marker[SP_MARKER_LOC_END].set) {
970 g_free(style->marker[SP_MARKER_LOC_END].value);
971 style->marker[SP_MARKER_LOC_END].value = g_strdup(val);
972 style->marker[SP_MARKER_LOC_END].set = TRUE;
973 style->marker[SP_MARKER_LOC_END].inherit = (val && !strcmp(val, "inherit"));
974 }
975 break;
977 case SP_PROP_SHAPE_RENDERING: {
978 /* Ignore the hint. */
979 SPIEnum dummy;
980 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_shape_rendering, true);
981 break;
982 }
984 case SP_PROP_STROKE:
985 if (!style->stroke.set) {
986 sp_style_read_ipaint(&style->stroke, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
987 }
988 break;
989 case SP_PROP_STROKE_WIDTH:
990 SPS_READ_ILENGTH_IF_UNSET(&style->stroke_width, val);
991 break;
992 case SP_PROP_STROKE_DASHARRAY:
993 if (!style->stroke_dasharray_set) {
994 sp_style_read_dash(style, val);
995 }
996 break;
997 case SP_PROP_STROKE_DASHOFFSET:
998 if (!style->stroke_dashoffset_set) {
999 /* fixme */
1000 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
1001 style->stroke_dashoffset_set = TRUE;
1002 } else {
1003 style->stroke_dashoffset_set = FALSE;
1004 }
1005 }
1006 break;
1007 case SP_PROP_STROKE_LINECAP:
1008 if (!style->stroke_linecap.set) {
1009 sp_style_read_ienum(&style->stroke_linecap, val, enum_stroke_linecap, true);
1010 }
1011 break;
1012 case SP_PROP_STROKE_LINEJOIN:
1013 if (!style->stroke_linejoin.set) {
1014 sp_style_read_ienum(&style->stroke_linejoin, val, enum_stroke_linejoin, true);
1015 }
1016 break;
1017 case SP_PROP_STROKE_MITERLIMIT:
1018 if (!style->stroke_miterlimit.set) {
1019 sp_style_read_ifloat(&style->stroke_miterlimit, val);
1020 }
1021 break;
1022 case SP_PROP_STROKE_OPACITY:
1023 if (!style->stroke_opacity.set) {
1024 sp_style_read_iscale24(&style->stroke_opacity, val);
1025 }
1026 break;
1028 default:
1029 g_warning("Invalid style property id: %d value: %s", id, val);
1030 break;
1031 }
1032 }
1034 static void
1035 sp_style_merge_style_from_decl(SPStyle *const style, CRDeclaration const *const decl)
1036 {
1037 /** \todo Ensure that property is lcased, as per
1038 * http://www.w3.org/TR/REC-CSS2/syndata.html#q4.
1039 * Should probably be done in libcroco.
1040 */
1041 unsigned const prop_idx = sp_attribute_lookup(decl->property->stryng->str);
1042 if (prop_idx != SP_ATTR_INVALID) {
1043 /** \todo
1044 * effic: Test whether the property is already set before trying to
1045 * convert to string. Alternatively, set from CRTerm directly rather
1046 * than converting to string.
1047 */
1048 guchar *const str_value_unsigned = cr_term_to_string(decl->value);
1049 gchar *const str_value = reinterpret_cast<gchar *>(str_value_unsigned);
1050 sp_style_merge_property(style, prop_idx, str_value);
1051 g_free(str_value);
1052 }
1053 }
1055 static void
1056 sp_style_merge_from_props(SPStyle *const style, CRPropList *const props)
1057 {
1058 #if 0 /* forwards */
1059 for (CRPropList const *cur = props; cur; cur = cr_prop_list_get_next(cur)) {
1060 CRDeclaration *decl = NULL;
1061 cr_prop_list_get_decl(cur, &decl);
1062 sp_style_merge_style_from_decl(style, decl);
1063 }
1064 #else /* in reverse order, as we need later declarations to take precedence over earlier ones. */
1065 if (props) {
1066 sp_style_merge_from_props(style, cr_prop_list_get_next(props));
1067 CRDeclaration *decl = NULL;
1068 cr_prop_list_get_decl(props, &decl);
1069 sp_style_merge_style_from_decl(style, decl);
1070 }
1071 #endif
1072 }
1074 /**
1075 * \pre decl_list != NULL
1076 */
1077 static void
1078 sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list)
1079 {
1080 if (decl_list->next) {
1081 sp_style_merge_from_decl_list(style, decl_list->next);
1082 }
1083 sp_style_merge_style_from_decl(style, decl_list);
1084 }
1086 static CRSelEng *
1087 sp_repr_sel_eng()
1088 {
1089 CRSelEng *const ret = cr_sel_eng_new();
1090 cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface);
1092 /** \todo
1093 * Check whether we need to register any pseudo-class handlers.
1094 * libcroco has its own default handlers for first-child and lang.
1095 *
1096 * We probably want handlers for link and arguably visited (though
1097 * inkscape can't visit links at the time of writing). hover etc.
1098 * more useful in inkview than the editor inkscape.
1099 *
1100 * http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that
1101 * the following should be honoured, at least by inkview:
1102 * :hover, :active, :focus, :visited, :link.
1103 */
1105 g_assert(ret);
1106 return ret;
1107 }
1109 static void
1110 sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object)
1111 {
1112 static CRSelEng *sel_eng = NULL;
1113 if (!sel_eng) {
1114 sel_eng = sp_repr_sel_eng();
1115 }
1117 CRPropList *props = NULL;
1118 CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng,
1119 object->document->style_cascade,
1120 object->repr,
1121 &props);
1122 g_return_if_fail(status == CR_OK);
1123 /// \todo Check what errors can occur, and handle them properly.
1124 if (props) {
1125 sp_style_merge_from_props(style, props);
1126 cr_prop_list_destroy(props);
1127 }
1128 }
1130 /**
1131 * Parses a style="..." string and merges it with an existing SPStyle.
1132 */
1133 void
1134 sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p)
1135 {
1136 /*
1137 * Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute:
1138 * ``When CSS styling is used, CSS inline style is specified by including
1139 * semicolon-separated property declarations of the form "name : value"
1140 * within the style attribute''.
1141 *
1142 * That's fairly ambiguous. Is a `value' allowed to contain semicolons?
1143 * Why does it say "including", what else is allowed in the style
1144 * attribute value?
1145 */
1147 CRDeclaration *const decl_list
1148 = cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8);
1149 if (decl_list) {
1150 sp_style_merge_from_decl_list(style, decl_list);
1151 cr_declaration_destroy(decl_list);
1152 }
1153 }
1155 /** Indexed by SP_CSS_FONT_SIZE_blah. */
1156 static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0};
1158 static void
1159 sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent)
1160 {
1161 /* 'font-size' */
1162 if (!child.set || child.inherit) {
1163 /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
1164 child.computed = parent.computed;
1165 } else if (child.type == SP_FONT_SIZE_LITERAL) {
1166 /** \todo
1167 * fixme: SVG and CSS do not specify clearly, whether we should use
1168 * user or screen coordinates (Lauris)
1169 */
1170 if (child.value < SP_CSS_FONT_SIZE_SMALLER) {
1171 child.computed = font_size_table[child.value];
1172 } else if (child.value == SP_CSS_FONT_SIZE_SMALLER) {
1173 child.computed = parent.computed / 1.2;
1174 } else if (child.value == SP_CSS_FONT_SIZE_LARGER) {
1175 child.computed = parent.computed * 1.2;
1176 } else {
1177 /* Illegal value */
1178 }
1179 } else if (child.type == SP_FONT_SIZE_PERCENTAGE) {
1180 /* Unlike most other lengths, percentage for font size is relative to parent computed value
1181 * rather than viewport. */
1182 child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value);
1183 }
1184 }
1186 /**
1187 * Sets computed values in \a style, which may involve inheriting from (or in some other way
1188 * calculating from) corresponding computed values of \a parent.
1189 *
1190 * References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default.
1191 * http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to
1192 * inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise
1193 * about what the computed value is (not obvious for lengths).
1194 *
1195 * \pre \a parent's computed values are already up-to-date.
1196 */
1197 void
1198 sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent)
1199 {
1200 g_return_if_fail(style != NULL);
1202 /** \todo
1203 * fixme: Check for existing callers that might pass null parent.
1204 * This should probably be g_return_if_fail, or else we should make a
1205 * best attempt to set computed values correctly without having a parent
1206 * (i.e., by assuming parent has initial values).
1207 */
1208 if (!parent)
1209 return;
1211 /* CSS2 */
1212 /* Font */
1213 sp_style_merge_font_size_from_parent(style->font_size, parent->font_size);
1215 /* 'font-style' */
1216 if (!style->font_style.set || style->font_style.inherit) {
1217 style->font_style.computed = parent->font_style.computed;
1218 }
1220 /* 'font-variant' */
1221 if (!style->font_variant.set || style->font_variant.inherit) {
1222 style->font_variant.computed = parent->font_variant.computed;
1223 }
1225 /* 'font-weight' */
1226 if (!style->font_weight.set || style->font_weight.inherit) {
1227 style->font_weight.computed = parent->font_weight.computed;
1228 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) {
1229 /** \todo
1230 * fixme: This is unconditional, i.e., happens even if parent not
1231 * present.
1232 */
1233 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
1234 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) {
1235 style->font_weight.computed = SP_CSS_FONT_WEIGHT_700;
1236 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) {
1237 unsigned const parent_val = parent->font_weight.computed;
1238 g_assert(SP_CSS_FONT_WEIGHT_100 == 0);
1239 // strictly, 'bolder' and 'lighter' should go to the next weight
1240 // expressible in the current font family, but that's difficult to
1241 // find out, so jumping by 3 seems an appropriate approximation
1242 style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3
1243 ? (unsigned)SP_CSS_FONT_WEIGHT_100
1244 : parent_val - 3);
1245 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1246 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) {
1247 unsigned const parent_val = parent->font_weight.computed;
1248 g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900);
1249 style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3
1250 ? (unsigned)SP_CSS_FONT_WEIGHT_900
1251 : parent_val + 3);
1252 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1253 }
1255 /* 'font-stretch' */
1256 if (!style->font_stretch.set || style->font_stretch.inherit) {
1257 style->font_stretch.computed = parent->font_stretch.computed;
1258 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) {
1259 unsigned const parent_val = parent->font_stretch.computed;
1260 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED
1261 ? parent_val
1262 : parent_val - 1);
1263 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1264 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) {
1265 unsigned const parent_val = parent->font_stretch.computed;
1266 g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1267 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED
1268 ? parent_val
1269 : parent_val + 1);
1270 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1271 }
1273 /* text (css2) */
1274 if (!style->text_indent.set || style->text_indent.inherit) {
1275 style->text_indent.computed = parent->text_indent.computed;
1276 }
1278 if (!style->text_align.set || style->text_align.inherit) {
1279 style->text_align.computed = parent->text_align.computed;
1280 }
1282 if (!style->text_decoration.set || style->text_decoration.inherit) {
1283 style->text_decoration.underline = parent->text_decoration.underline;
1284 style->text_decoration.overline = parent->text_decoration.overline;
1285 style->text_decoration.line_through = parent->text_decoration.line_through;
1286 style->text_decoration.blink = parent->text_decoration.blink;
1287 }
1289 if (!style->line_height.set || style->line_height.inherit) {
1290 style->line_height.computed = parent->line_height.computed;
1291 style->line_height.normal = parent->line_height.normal;
1292 }
1294 if (!style->letter_spacing.set || style->letter_spacing.inherit) {
1295 style->letter_spacing.computed = parent->letter_spacing.computed;
1296 style->letter_spacing.normal = parent->letter_spacing.normal;
1297 }
1299 if (!style->word_spacing.set || style->word_spacing.inherit) {
1300 style->word_spacing.computed = parent->word_spacing.computed;
1301 style->word_spacing.normal = parent->word_spacing.normal;
1302 }
1304 if (!style->text_transform.set || style->text_transform.inherit) {
1305 style->text_transform.computed = parent->text_transform.computed;
1306 }
1308 if (!style->direction.set || style->direction.inherit) {
1309 style->direction.computed = parent->direction.computed;
1310 }
1312 if (!style->block_progression.set || style->block_progression.inherit) {
1313 style->block_progression.computed = parent->block_progression.computed;
1314 }
1316 if (!style->writing_mode.set || style->writing_mode.inherit) {
1317 style->writing_mode.computed = parent->writing_mode.computed;
1318 }
1320 if (!style->text_anchor.set || style->text_anchor.inherit) {
1321 style->text_anchor.computed = parent->text_anchor.computed;
1322 }
1324 if (style->opacity.inherit) {
1325 style->opacity.value = parent->opacity.value;
1326 }
1328 /* Color */
1329 if (!style->color.set || style->color.inherit) {
1330 sp_style_merge_ipaint(style, &style->color, &parent->color);
1331 }
1333 /* Fill */
1334 if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) {
1335 sp_style_merge_ipaint(style, &style->fill, &parent->fill);
1336 }
1338 if (!style->fill_opacity.set || style->fill_opacity.inherit) {
1339 style->fill_opacity.value = parent->fill_opacity.value;
1340 }
1342 if (!style->fill_rule.set || style->fill_rule.inherit) {
1343 style->fill_rule.computed = parent->fill_rule.computed;
1344 }
1346 /* Stroke */
1347 if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) {
1348 sp_style_merge_ipaint(style, &style->stroke, &parent->stroke);
1349 }
1351 if (!style->stroke_width.set || style->stroke_width.inherit) {
1352 style->stroke_width.computed = parent->stroke_width.computed;
1353 } else {
1354 /* Update computed value for any change in font inherited from parent. */
1355 double const em = style->font_size.computed;
1356 if (style->stroke_width.unit == SP_CSS_UNIT_EM) {
1357 style->stroke_width.computed = style->stroke_width.value * em;
1358 } else if (style->stroke_width.unit == SP_CSS_UNIT_EX) {
1359 double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango.
1360 style->stroke_width.computed = style->stroke_width.value * ex;
1361 }
1362 }
1364 if (!style->stroke_linecap.set || style->stroke_linecap.inherit) {
1365 style->stroke_linecap.computed = parent->stroke_linecap.computed;
1366 }
1368 if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) {
1369 style->stroke_linejoin.computed = parent->stroke_linejoin.computed;
1370 }
1372 if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) {
1373 style->stroke_miterlimit.value = parent->stroke_miterlimit.value;
1374 }
1376 if (!style->stroke_dasharray_set && parent->stroke_dasharray_set) {
1377 /** \todo
1378 * This code looks wrong. Why does the logic differ from the
1379 * above properties? Similarly dashoffset below.
1380 */
1381 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1382 if (style->stroke_dash.n_dash > 0) {
1383 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1384 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1385 }
1386 }
1388 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1389 style->stroke_dash.offset = parent->stroke_dash.offset;
1390 }
1392 if (!style->stroke_opacity.set || style->stroke_opacity.inherit) {
1393 style->stroke_opacity.value = parent->stroke_opacity.value;
1394 }
1396 if (style->text && parent->text) {
1397 if (!style->text->font_family.set || style->text->font_family.inherit) {
1398 g_free(style->text->font_family.value);
1399 style->text->font_family.value = g_strdup(parent->text->font_family.value);
1400 }
1401 }
1403 /* Markers - Free the old value and make copy of the new */
1404 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1405 if (!style->marker[i].set || style->marker[i].inherit) {
1406 g_free(style->marker[i].value);
1407 style->marker[i].value = g_strdup(parent->marker[i].value);
1408 }
1409 }
1410 }
1412 template <typename T>
1413 static void
1414 sp_style_merge_prop_from_dying_parent(T &child, T const &parent)
1415 {
1416 if ( ( !(child.set) || child.inherit )
1417 && parent.set && !(parent.inherit) )
1418 {
1419 child = parent;
1420 }
1421 }
1423 /**
1424 * Copy SPIString from parent to child.
1425 */
1426 static void
1427 sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent)
1428 {
1429 if ( ( !(child.set) || child.inherit )
1430 && parent.set && !(parent.inherit) )
1431 {
1432 g_free(child.value);
1433 child.value = g_strdup(parent.value);
1434 child.set = parent.set;
1435 child.inherit = parent.inherit;
1436 }
1437 }
1439 static void
1440 sp_style_merge_paint_prop_from_dying_parent(SPStyle *style,
1441 SPIPaint &child, SPIPaint const &parent)
1442 {
1443 /** \todo
1444 * I haven't given this much attention. See comments below about
1445 * currentColor, colorProfile, and relative URIs.
1446 */
1447 if (!child.set || child.inherit || child.currentcolor) {
1448 sp_style_merge_ipaint(style, &child, &parent);
1449 child.set = parent.set;
1450 child.inherit = parent.inherit;
1451 }
1452 }
1454 static void
1455 sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent,
1456 unsigned const max_computed_val,
1457 unsigned const smaller_val)
1458 {
1459 /* We assume that min computed val is 0, contiguous up to max_computed_val,
1460 then zero or more other absolute values, then smaller_val then larger_val. */
1461 unsigned const min_computed_val = 0;
1462 unsigned const larger_val = smaller_val + 1;
1463 g_return_if_fail(min_computed_val < max_computed_val);
1464 g_return_if_fail(max_computed_val < smaller_val);
1466 if (parent.set && !parent.inherit) {
1467 if (!child.set || child.inherit) {
1468 child.value = parent.value;
1469 child.set = parent.set; // i.e. true
1470 child.inherit = parent.inherit; // i.e. false
1471 } else if (child.value < smaller_val) {
1472 /* Child has absolute value: leave as is. */
1473 } else if ( ( child.value == smaller_val
1474 && parent.value == larger_val )
1475 || ( parent.value == smaller_val
1476 && child.value == larger_val ) )
1477 {
1478 child.set = false;
1479 /*
1480 * Note that this can result in a change in computed value in the
1481 * rare case that the parent's setting was a no-op (i.e. if the
1482 * parent's parent's computed value was already ultra-condensed or
1483 * ultra-expanded). However, I'd guess that the change is for the
1484 * better: I'd guess that if the properties were specified
1485 * relatively, then the intent is to counteract parent's effect.
1486 * I.e. I believe this is the best code even in that case.
1487 */
1488 } else if (child.value == parent.value) {
1489 /* Leave as is. */
1490 /** \todo
1491 * It's unclear what to do if style and parent specify the same
1492 * relative directive (narrower or wider). We can either convert
1493 * to absolute specification or coalesce to a single relative
1494 * request (of half the strength of the original pair).
1495 *
1496 * Converting to a single level of relative specification is a
1497 * better choice if the newly-unlinked clone is itself cloned to
1498 * other contexts (inheriting different font stretchiness): it
1499 * would preserve the effect that it will be narrower than
1500 * the inherited context in each case. The disadvantage is that
1501 * it will ~certainly affect the computed value of the
1502 * newly-unlinked clone.
1503 */
1504 } else {
1505 unsigned const parent_val = parent.computed;
1506 child.value = ( child.value == smaller_val
1507 ? ( parent_val == min_computed_val
1508 ? parent_val
1509 : parent_val - 1 )
1510 : ( parent_val == max_computed_val
1511 ? parent_val
1512 : parent_val + 1 ) );
1513 g_assert(child.value <= max_computed_val);
1514 child.inherit = false;
1515 g_assert(child.set);
1516 }
1517 }
1518 }
1520 template <typename LengthT>
1521 static void
1522 sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent,
1523 double const parent_child_em_ratio)
1524 {
1525 if ( ( !(child.set) || child.inherit )
1526 && parent.set && !(parent.inherit) )
1527 {
1528 child = parent;
1529 switch (parent.unit) {
1530 case SP_CSS_UNIT_EM:
1531 case SP_CSS_UNIT_EX:
1532 child.value *= parent_child_em_ratio;
1533 /** \todo
1534 * fixme: Have separate ex ratio parameter.
1535 * Get x height from libnrtype or pango.
1536 */
1537 if (!isFinite(child.value)) {
1538 child.value = child.computed;
1539 child.unit = SP_CSS_UNIT_NONE;
1540 }
1541 break;
1543 default:
1544 break;
1545 }
1546 }
1547 }
1549 static double
1550 get_relative_font_size_frac(SPIFontSize const &font_size)
1551 {
1552 switch (font_size.type) {
1553 case SP_FONT_SIZE_LITERAL: {
1554 switch (font_size.value) {
1555 case SP_CSS_FONT_SIZE_SMALLER:
1556 return 5.0 / 6.0;
1558 case SP_CSS_FONT_SIZE_LARGER:
1559 return 6.0 / 5.0;
1561 default:
1562 g_assert_not_reached();
1563 }
1564 }
1566 case SP_FONT_SIZE_PERCENTAGE:
1567 return SP_F8_16_TO_FLOAT(font_size.value);
1569 case SP_FONT_SIZE_LENGTH:
1570 g_assert_not_reached();
1571 }
1572 g_assert_not_reached();
1573 }
1575 /**
1576 * Combine \a style and \a parent style specifications into a single style specification that
1577 * preserves (as much as possible) the effect of the existing \a style being a child of \a parent.
1578 *
1579 * Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being
1580 * unlinked), in which case we copy/adapt property values that are explicitly set in \a parent,
1581 * trying to retain the same visual appearance once the parent is removed. Interesting cases are
1582 * when there is unusual interaction with the parent's value (opacity, display) or when the value
1583 * can be specified as relative to the parent computed value (font-size, font-weight etc.).
1584 *
1585 * Doesn't update computed values of \a style. For correctness, you should subsequently call
1586 * sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a
1587 * style was previously up-to-date wrt \a parent.
1588 *
1589 * \pre \a parent's computed values are already up-to-date.
1590 * (\a style's computed values needn't be up-to-date.)
1591 */
1592 void
1593 sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent)
1594 {
1595 /** \note
1596 * The general rule for each property is as follows:
1597 *
1598 * If style is set to an absolute value, then leave it as is.
1599 *
1600 * Otherwise (i.e. if style has a relative value):
1601 *
1602 * If parent is set to an absolute value, then set style to the computed value.
1603 *
1604 * Otherwise, calculate the combined relative value (e.g. multiplying the two percentages).
1605 */
1607 /* We do font-size first, to ensure that em size is up-to-date. */
1608 /** \todo
1609 * fixme: We'll need to have more font-related things up the top once
1610 * we're getting x-height from pango or libnrtype.
1611 */
1613 /* Some things that allow relative specifications. */
1614 {
1615 /* font-size. Note that we update the computed font-size of style,
1616 to assist in em calculations later in this function. */
1617 if (parent->font_size.set && !parent->font_size.inherit) {
1618 if (!style->font_size.set || style->font_size.inherit) {
1619 /* font_size inherits the computed value, so we can use the parent value
1620 * verbatim. */
1621 style->font_size = parent->font_size;
1622 } else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) {
1623 /* Child already has absolute size (stored in computed value), so do nothing. */
1624 } else if ( style->font_size.type == SP_FONT_SIZE_LITERAL
1625 && style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) {
1626 /* Child already has absolute size, but we ensure that the computed value
1627 is up-to-date. */
1628 unsigned const ix = style->font_size.value;
1629 g_assert(ix < G_N_ELEMENTS(font_size_table));
1630 style->font_size.computed = font_size_table[ix];
1631 } else {
1632 /* Child has relative size. */
1633 double const child_frac(get_relative_font_size_frac(style->font_size));
1634 style->font_size.set = true;
1635 style->font_size.inherit = false;
1636 style->font_size.computed = parent->font_size.computed * child_frac;
1638 if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL
1639 && parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER )
1640 || parent->font_size.type == SP_FONT_SIZE_LENGTH )
1641 {
1642 /* Absolute value. */
1643 style->font_size.type = SP_FONT_SIZE_LENGTH;
1644 /* .value is unused for SP_FONT_SIZE_LENGTH. */
1645 } else {
1646 /* Relative value. */
1647 double const parent_frac(get_relative_font_size_frac(parent->font_size));
1648 style->font_size.type = SP_FONT_SIZE_PERCENTAGE;
1649 style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac);
1650 }
1651 }
1652 }
1654 /* 'font-stretch' */
1655 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch,
1656 parent->font_stretch,
1657 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
1658 SP_CSS_FONT_STRETCH_NARROWER);
1660 /* font-weight */
1661 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight,
1662 parent->font_weight,
1663 SP_CSS_FONT_WEIGHT_900,
1664 SP_CSS_FONT_WEIGHT_LIGHTER);
1665 }
1668 /* Enum values that don't have any relative settings (other than `inherit'). */
1669 {
1670 SPIEnum SPStyle::*const fields[] = {
1671 //nyi: SPStyle::clip_rule,
1672 //nyi: SPStyle::color_interpolation,
1673 //nyi: SPStyle::color_interpolation_filters,
1674 //nyi: SPStyle::color_rendering,
1675 &SPStyle::direction,
1676 &SPStyle::fill_rule,
1677 &SPStyle::font_style,
1678 &SPStyle::font_variant,
1679 //nyi: SPStyle::image_rendering,
1680 //nyi: SPStyle::pointer_events,
1681 //nyi: SPStyle::shape_rendering,
1682 &SPStyle::stroke_linecap,
1683 &SPStyle::stroke_linejoin,
1684 &SPStyle::text_anchor,
1685 //nyi: &SPStyle::text_rendering,
1686 &SPStyle::visibility,
1687 &SPStyle::writing_mode
1688 };
1690 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1691 SPIEnum SPStyle::*const fld = fields[i];
1692 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld);
1693 }
1694 }
1696 /* A few other simple inheritance properties. */
1697 {
1698 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity);
1699 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity);
1700 sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit);
1702 /** \todo
1703 * We currently treat text-decoration as if it were a simple inherited
1704 * property (fixme). This code may need changing once we do the
1705 * special fill/stroke inheritance mentioned by the spec.
1706 */
1707 sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration,
1708 parent->text_decoration);
1710 //nyi: font-size-adjust, // <number> | none | inherit
1711 //nyi: glyph-orientation-horizontal,
1712 //nyi: glyph-orientation-vertical,
1713 }
1715 /* Properties that involve length but are easy in other respects. */
1716 {
1717 /* The difficulty with lengths is that font-relative units need adjusting if the font
1718 * varies between parent & child.
1719 *
1720 * Lengths specified in the existing child can stay as they are: its computed font
1721 * specification should stay unchanged, so em & ex lengths should continue to mean the same
1722 * size.
1723 *
1724 * Lengths specified in the dying parent in em or ex need to be scaled according to the
1725 * ratio of em or ex size between parent & child.
1726 */
1727 double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed;
1729 SPILength SPStyle::*const lfields[] = {
1730 &SPStyle::stroke_width,
1731 &SPStyle::text_indent
1732 };
1733 for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) {
1734 SPILength SPStyle::*fld = lfields[i];
1735 sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld,
1736 parent->*fld,
1737 parent_child_em_ratio);
1738 }
1740 SPILengthOrNormal SPStyle::*const nfields[] = {
1741 &SPStyle::letter_spacing,
1742 &SPStyle::line_height,
1743 &SPStyle::word_spacing
1744 };
1745 for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) {
1746 SPILengthOrNormal SPStyle::*fld = nfields[i];
1747 sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld,
1748 parent->*fld,
1749 parent_child_em_ratio);
1750 }
1752 //nyi: &SPStyle::kerning: length or `auto'
1754 /* fixme: Move stroke-dash and stroke-dash-offset here once they
1755 can accept units. */
1756 }
1758 /* Properties that involve a URI but are easy in other respects. */
1759 {
1760 /** \todo
1761 * Could cause problems if original object was in another document
1762 * and it used a relative URL. (At the time of writing, we don't
1763 * allow hrefs to other documents, so this isn't a problem yet.)
1764 * Paint properties also allow URIs.
1765 */
1766 //nyi: cursor, // may involve change in effect, but we can't do much better
1767 //nyi: color-profile,
1769 // Markers (marker-start, marker-mid, marker-end).
1770 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1771 sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]);
1772 }
1773 }
1775 /* CSS2 */
1776 /* Font */
1778 if (style->text && parent->text) {
1779 sp_style_merge_string_prop_from_dying_parent(style->text->font_family,
1780 parent->text->font_family);
1781 }
1783 /* Properties that don't inherit by default. Most of these need special handling. */
1784 {
1785 /*
1786 * opacity's effect is cumulative; we set the new value to the combined effect. The
1787 * default value for opacity is 1.0, not inherit. (Note that stroke-opacity and
1788 * fill-opacity are quite different from opacity, and don't need any special handling.)
1789 *
1790 * Cases:
1791 * - parent & child were each previously unset, in which case the effective
1792 * opacity value is 1.0, and style should remain unset.
1793 * - parent was previously unset (so computed opacity value of 1.0)
1794 * and child was set to inherit. The merged child should
1795 * get a value of 1.0, and shouldn't inherit (lest the new parent
1796 * has a different opacity value). Given that opacity's default
1797 * value is 1.0 (rather than inherit), we might as well have the
1798 * merged child's opacity be unset.
1799 * - parent was previously unset (so opacity 1.0), and child was set to a number.
1800 * The merged child should retain its existing settings (though it doesn't matter
1801 * if we make it unset if that number was 1.0).
1802 * - parent was inherit and child was unset. Merged child should be set to inherit.
1803 * - parent was inherit and child was inherit. (We can't in general reproduce this
1804 * effect (short of introducing a new group), but setting opacity to inherit is rare.)
1805 * If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged
1806 * child's value should be set to the product of the two, i.e. the square of the
1807 * inherited value, and should not be marked as inherit. (This decision assumes that it
1808 * is more important to retain the effective opacity than to retain the inheriting
1809 * effect, and assumes that the inheriting effect either isn't important enough to create
1810 * a group or isn't common enough to bother maintaining the code to create a group.) If
1811 * the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes
1812 * closer to maintaining the effect.
1813 * - parent was inherit and child was set to a numerical value. If the child's value
1814 * was 1.0, then the merged child should have the same settings as the parent.
1815 * If the child's value was 0, then the merged child should also be set to 0.
1816 * If the child's value was anything else, then we do the same as for the inherit/inherit
1817 * case above: have the merged child set to the product of the two opacities and not
1818 * marked as inherit, for the same reasons as for that case.
1819 * - parent was set to a value, and child was unset. The merged child should have
1820 * parent's settings.
1821 * - parent was set to a value, and child was inherit. The merged child should
1822 * be set to the product, i.e. the square of the parent's value.
1823 * - parent & child are each set to a value. The merged child should be set to the
1824 * product.
1825 */
1826 if ( !style->opacity.set
1827 || ( !style->opacity.inherit
1828 && style->opacity.value == SP_SCALE24_MAX ) )
1829 {
1830 style->opacity = parent->opacity;
1831 } else {
1832 /* Ensure that style's computed value is up-to-date. */
1833 if (style->opacity.inherit) {
1834 style->opacity.value = parent->opacity.value;
1835 }
1837 /* Multiplication of opacities occurs even if a child's opacity is set to inherit. */
1838 style->opacity.value = SP_SCALE24_MUL(style->opacity.value,
1839 parent->opacity.value);
1841 style->opacity.inherit = (parent->opacity.inherit
1842 && style->opacity.inherit
1843 && (parent->opacity.value == 0 ||
1844 parent->opacity.value == SP_SCALE24_MAX));
1845 style->opacity.set = ( style->opacity.inherit
1846 || style->opacity.value < SP_SCALE24_MAX );
1847 }
1849 /* display is in principle similar to opacity, but implementation is easier. */
1850 if ( parent->display.set && !parent->display.inherit
1851 && parent->display.value == SP_CSS_DISPLAY_NONE ) {
1852 style->display.value = SP_CSS_DISPLAY_NONE;
1853 style->display.set = true;
1854 style->display.inherit = false;
1855 } else if (style->display.inherit) {
1856 style->display.value = parent->display.value;
1857 style->display.set = parent->display.set;
1858 style->display.inherit = parent->display.inherit;
1859 } else {
1860 /* Leave as is. (display doesn't inherit by default.) */
1861 }
1863 /** \todo
1864 * fixme: Check that we correctly handle all properties that don't
1865 * inherit by default (as shown in
1866 * http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties).
1867 */
1868 }
1870 /* SPIPaint properties (including color). */
1871 {
1872 /** \todo
1873 * Think about the issues involved if specified as currentColor or
1874 * if specified relative to colorProfile, and if the currentColor or
1875 * colorProfile differs between parent \& child. See also comments
1876 * elsewhere in this function about URIs.
1877 */
1878 SPIPaint SPStyle::*const fields[] = {
1879 &SPStyle::color,
1880 &SPStyle::fill,
1881 &SPStyle::stroke
1882 };
1883 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1884 SPIPaint SPStyle::*const fld = fields[i];
1885 sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld);
1886 }
1887 }
1889 /* Things from SVG 1.2 or CSS3. */
1890 {
1891 /* Note: If we ever support setting string values for text-align then we'd need strdup
1892 * handling here. */
1893 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align);
1895 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform);
1896 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression);
1897 }
1899 /* Note: this will need length handling once dasharray supports units. */
1900 if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit )
1901 && parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit )
1902 {
1903 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1904 if (style->stroke_dash.n_dash > 0) {
1905 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1906 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1907 }
1908 style->stroke_dasharray_set = parent->stroke_dasharray_set;
1909 style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit;
1910 }
1912 /* Note: this will need length handling once dasharray_offset supports units. */
1913 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1914 style->stroke_dash.offset = parent->stroke_dash.offset;
1915 style->stroke_dashoffset_set = parent->stroke_dashoffset_set;
1916 /* fixme: we don't currently allow stroke-dashoffset to be `inherit'. TODO: Try to
1917 * represent it as a normal SPILength; though will need to do something about existing
1918 * users of stroke_dash.offset and stroke_dashoffset_set. */
1919 }
1920 }
1924 /**
1925 * Disconnects from possible fill and stroke paint servers.
1926 */
1927 static void
1928 sp_style_paint_server_release(SPPaintServer *server, SPStyle *style)
1929 {
1930 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1931 && (server == style->fill.value.paint.server))
1932 {
1933 sp_style_paint_clear(style, &style->fill, TRUE, FALSE);
1934 }
1936 if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
1937 && (server == style->stroke.value.paint.server))
1938 {
1939 sp_style_paint_clear(style, &style->stroke, TRUE, FALSE);
1940 }
1941 }
1946 /**
1947 * Emit style modified signal on style's object if server is style's fill
1948 * or stroke paint server.
1949 */
1950 static void
1951 sp_style_paint_server_modified(SPPaintServer *server, guint flags, SPStyle *style)
1952 {
1953 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1954 && (server == style->fill.value.paint.server))
1955 {
1956 if (style->object) {
1957 /** \todo
1958 * fixme: I do not know, whether it is optimal - we are
1959 * forcing reread of everything (Lauris)
1960 */
1961 /** \todo
1962 * fixme: We have to use object_modified flag, because parent
1963 * flag is only available downstreams.
1964 */
1965 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1966 }
1967 } else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
1968 && (server == style->stroke.value.paint.server))
1969 {
1970 if (style->object) {
1971 /// \todo fixme:
1972 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1973 }
1974 } else {
1975 g_assert_not_reached();
1976 }
1977 }
1981 /**
1982 *
1983 */
1984 static void
1985 sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
1986 {
1987 sp_style_paint_clear(style, paint, TRUE, FALSE);
1989 if ((paint->set && paint->currentcolor) || parent->currentcolor) {
1990 paint->currentcolor = TRUE;
1991 paint->type = SP_PAINT_TYPE_COLOR;
1992 sp_color_copy(&paint->value.color, &style->color.value.color);
1993 return;
1994 }
1996 paint->type = parent->type;
1997 switch (paint->type) {
1998 case SP_PAINT_TYPE_COLOR:
1999 sp_color_copy(&paint->value.color, &parent->value.color);
2000 break;
2001 case SP_PAINT_TYPE_PAINTSERVER:
2002 paint->value.paint.server = parent->value.paint.server;
2003 paint->value.paint.uri = parent->value.paint.uri;
2004 if (paint->value.paint.server) {
2005 if (style->object && !style->cloned) { // href paintserver for style of non-clones only
2006 style->hreffed = true;
2007 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
2008 }
2009 if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
2010 g_signal_connect(G_OBJECT(paint->value.paint.server), "release",
2011 G_CALLBACK(sp_style_paint_server_release), style);
2012 g_signal_connect(G_OBJECT(paint->value.paint.server), "modified",
2013 G_CALLBACK(sp_style_paint_server_modified), style);
2014 style->listening = true;
2015 }
2016 }
2017 break;
2018 case SP_PAINT_TYPE_NONE:
2019 break;
2020 default:
2021 g_assert_not_reached();
2022 break;
2023 }
2024 }
2027 /**
2028 * Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or
2029 * SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's
2030 * complete cascaded style to style_clipboard. When you need a CSS string
2031 * for an object in the document tree, you normally call
2032 * sp_style_write_difference instead to take into account the object's parent.
2033 *
2034 * \pre style != NULL.
2035 * \pre flags in {IFSET, ALWAYS}.
2036 * \post ret != NULL.
2037 */
2038 gchar *
2039 sp_style_write_string(SPStyle const *const style, guint const flags)
2040 {
2041 /** \todo
2042 * Merge with write_difference, much duplicate code!
2043 */
2044 g_return_val_if_fail(style != NULL, NULL);
2045 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
2046 (flags == SP_STYLE_FLAG_ALWAYS) ),
2047 NULL);
2049 gchar c[BMAX];
2050 gchar *p = c;
2051 *p = '\0';
2053 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags);
2054 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags);
2055 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags);
2056 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags);
2057 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags);
2059 /* Text */
2060 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags);
2061 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags);
2062 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags);
2063 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags);
2064 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags);
2065 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags);
2066 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags);
2067 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags);
2068 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags);
2069 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags);
2071 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags);
2073 /// \todo fixme: Per type methods need default flag too (lauris)
2074 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags);
2075 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags);
2076 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags);
2077 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags);
2078 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags);
2079 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags);
2080 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags);
2081 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags);
2082 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags);
2084 marker_status("sp_style_write_string: Writing markers");
2085 if (style->marker[SP_MARKER_LOC].set) {
2086 p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value);
2087 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2088 p += g_snprintf(p, c + BMAX - p, "marker:none;");
2089 }
2090 if (style->marker[SP_MARKER_LOC_START].set) {
2091 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value);
2092 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2093 p += g_snprintf(p, c + BMAX - p, "marker-start:none;");
2094 }
2095 if (style->marker[SP_MARKER_LOC_MID].set) {
2096 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value);
2097 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2098 p += g_snprintf(p, c + BMAX - p, "marker-mid:none;");
2099 }
2100 if (style->marker[SP_MARKER_LOC_END].set) {
2101 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value);
2102 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2103 p += g_snprintf(p, c + BMAX - p, "marker-end:none;");
2104 }
2106 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags);
2108 /** \todo fixme: */
2109 if ((flags == SP_STYLE_FLAG_ALWAYS)
2110 || style->stroke_dasharray_set)
2111 {
2112 if (style->stroke_dasharray_inherit) {
2113 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2114 } else if (style->stroke_dash.n_dash && style->stroke_dash.dash) {
2115 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2116 gint i;
2117 for (i = 0; i < style->stroke_dash.n_dash; i++) {
2118 Inkscape::CSSOStringStream os;
2119 if (i) {
2120 os << ", ";
2121 }
2122 os << style->stroke_dash.dash[i];
2123 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2124 }
2125 if (p < c + BMAX) {
2126 *p++ = ';';
2127 }
2128 } else {
2129 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;");
2130 }
2131 }
2133 /** \todo fixme: */
2134 if (style->stroke_dashoffset_set) {
2135 Inkscape::CSSOStringStream os;
2136 os << "stroke-dashoffset:" << style->stroke_dash.offset << ";";
2137 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2138 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2139 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;");
2140 }
2142 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags);
2144 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags);
2145 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags);
2146 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags);
2148 /* fixme: */
2149 p += sp_text_style_write(p, c + BMAX - p, style->text, flags);
2151 /* Get rid of trailing `;'. */
2152 if (p != c) {
2153 --p;
2154 if (*p == ';') {
2155 *p = '\0';
2156 }
2157 }
2159 return g_strdup(c);
2160 }
2163 #define STYLE_BUF_MAX
2166 /**
2167 * Dumps style to CSS string, see sp_style_write_string()
2168 *
2169 * \pre from != NULL.
2170 * \pre to != NULL.
2171 * \post ret != NULL.
2172 */
2173 gchar *
2174 sp_style_write_difference(SPStyle const *const from, SPStyle const *const to)
2175 {
2176 g_return_val_if_fail(from != NULL, NULL);
2177 g_return_val_if_fail(to != NULL, NULL);
2179 gchar c[BMAX], *p = c;
2180 *p = '\0';
2182 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF);
2183 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF);
2184 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF);
2185 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF);
2186 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF);
2188 /* Text */
2189 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF);
2190 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF);
2191 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF);
2192 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF);
2193 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF);
2194 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF);
2195 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF);
2196 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF);
2197 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF);
2198 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF);
2200 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF);
2202 /// \todo fixme: Per type methods need default flag too
2203 if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) {
2204 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET);
2205 }
2206 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET);
2207 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF);
2208 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF);
2209 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF);
2210 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF);
2211 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF);
2212 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap,
2213 &from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF);
2214 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin,
2215 &from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF);
2216 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit",
2217 &from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF);
2218 /** \todo fixme: */
2219 if (from->stroke_dasharray_set) {
2220 if (from->stroke_dasharray_inherit) {
2221 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2222 } else if (from->stroke_dash.n_dash && from->stroke_dash.dash) {
2223 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2224 for (gint i = 0; i < from->stroke_dash.n_dash; i++) {
2225 Inkscape::CSSOStringStream os;
2226 if (i) {
2227 os << ", ";
2228 }
2229 os << from->stroke_dash.dash[i];
2230 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2231 }
2232 p += g_snprintf(p, c + BMAX - p, ";");
2233 }
2234 }
2235 /* fixme: */
2236 if (from->stroke_dashoffset_set) {
2237 Inkscape::CSSOStringStream os;
2238 os << "stroke-dashoffset:" << from->stroke_dash.offset << ";";
2239 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2240 }
2241 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF);
2243 /* markers */
2244 marker_status("sp_style_write_difference: Writing markers");
2245 if (from->marker[SP_MARKER_LOC].value != NULL) {
2246 p += g_snprintf(p, c + BMAX - p, "marker:%s;", from->marker[SP_MARKER_LOC].value);
2247 }
2248 if (from->marker[SP_MARKER_LOC_START].value != NULL) {
2249 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value);
2250 }
2251 if (from->marker[SP_MARKER_LOC_MID].value != NULL) {
2252 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value);
2253 }
2254 if (from->marker[SP_MARKER_LOC_END].value != NULL) {
2255 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value);
2256 }
2258 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET);
2259 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET);
2260 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET);
2262 p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF);
2264 /** \todo
2265 * The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF
2266 * flag is mainly only for attributes that don't handle explicit unset well.
2267 * We may need to revisit the behaviour of this routine.
2268 */
2270 /* Get rid of trailing `;'. */
2271 if (p != c) {
2272 --p;
2273 if (*p == ';') {
2274 *p = '\0';
2275 }
2276 }
2278 return g_strdup(c);
2279 }
2283 /**
2284 * Reset all style properties.
2285 */
2286 static void
2287 sp_style_clear(SPStyle *style)
2288 {
2289 g_return_if_fail(style != NULL);
2291 sp_style_paint_clear(style, &style->fill, TRUE, FALSE);
2292 sp_style_paint_clear(style, &style->stroke, TRUE, FALSE);
2293 if (style->stroke_dash.dash) {
2294 g_free(style->stroke_dash.dash);
2295 }
2297 /** \todo fixme: Do that text manipulation via parents */
2298 SPObject *object = style->object;
2299 gint const refcount = style->refcount;
2300 SPTextStyle *text = style->text;
2301 unsigned const text_private = style->text_private;
2302 memset(style, 0, sizeof(SPStyle));
2303 style->refcount = refcount;
2304 style->object = object;
2305 style->text = text;
2306 style->text_private = text_private;
2307 /* fixme: */
2308 style->text->font.set = FALSE;
2309 style->text->font_family.set = FALSE;
2311 style->font_size.set = FALSE;
2312 style->font_size.type = SP_FONT_SIZE_LITERAL;
2313 style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM;
2314 style->font_size.computed = 12.0;
2315 style->font_style.set = FALSE;
2316 style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL;
2317 style->font_variant.set = FALSE;
2318 style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL;
2319 style->font_weight.set = FALSE;
2320 style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL;
2321 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
2322 style->font_stretch.set = FALSE;
2323 style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL;
2325 /* text */
2326 style->text_indent.set = FALSE;
2327 style->text_indent.unit = SP_CSS_UNIT_NONE;
2328 style->text_indent.computed = 0.0;
2330 style->text_align.set = FALSE;
2331 style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START;
2333 style->text_decoration.set = FALSE;
2334 style->text_decoration.underline = FALSE;
2335 style->text_decoration.overline = FALSE;
2336 style->text_decoration.line_through = FALSE;
2337 style->text_decoration.blink = FALSE;
2339 style->line_height.set = FALSE;
2340 style->line_height.unit = SP_CSS_UNIT_PERCENT;
2341 style->line_height.normal = TRUE;
2342 style->line_height.value = style->line_height.computed = 1.0;
2344 style->letter_spacing.set = FALSE;
2345 style->letter_spacing.unit = SP_CSS_UNIT_NONE;
2346 style->letter_spacing.normal = TRUE;
2347 style->letter_spacing.value = style->letter_spacing.computed = 0.0;
2349 style->word_spacing.set = FALSE;
2350 style->word_spacing.unit = SP_CSS_UNIT_NONE;
2351 style->word_spacing.normal = TRUE;
2352 style->word_spacing.value = style->word_spacing.computed = 0.0;
2354 style->text_transform.set = FALSE;
2355 style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE;
2357 style->direction.set = FALSE;
2358 style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR;
2360 style->block_progression.set = FALSE;
2361 style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB;
2363 style->writing_mode.set = FALSE;
2364 style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB;
2367 style->text_anchor.set = FALSE;
2368 style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START;
2371 style->opacity.value = SP_SCALE24_MAX;
2372 style->visibility.set = FALSE;
2373 style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE;
2374 style->display.set = FALSE;
2375 style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE;
2376 style->overflow.set = FALSE;
2377 style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE;
2379 style->color.type = SP_PAINT_TYPE_COLOR;
2380 sp_color_set_rgb_float(&style->color.value.color, 0.0, 0.0, 0.0);
2382 style->fill.type = SP_PAINT_TYPE_COLOR;
2383 sp_color_set_rgb_float(&style->fill.value.color, 0.0, 0.0, 0.0);
2384 style->fill_opacity.value = SP_SCALE24_MAX;
2385 style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO;
2387 style->stroke.type = SP_PAINT_TYPE_NONE;
2388 style->stroke.set = FALSE;
2389 sp_color_set_rgb_float(&style->stroke.value.color, 0.0, 0.0, 0.0);
2390 style->stroke_opacity.value = SP_SCALE24_MAX;
2392 style->stroke_width.set = FALSE;
2393 style->stroke_width.unit = SP_CSS_UNIT_NONE;
2394 style->stroke_width.computed = 1.0;
2396 style->stroke_linecap.set = FALSE;
2397 style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT;
2398 style->stroke_linejoin.set = FALSE;
2399 style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER;
2401 style->stroke_miterlimit.set = FALSE;
2402 style->stroke_miterlimit.value = 4.0;
2404 style->stroke_dash.n_dash = 0;
2405 style->stroke_dash.dash = NULL;
2406 style->stroke_dash.offset = 0.0;
2408 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
2409 g_free(style->marker[i].value);
2410 style->marker[i].set = FALSE;
2411 }
2412 }
2416 /**
2417 *
2418 */
2419 static void
2420 sp_style_read_dash(SPStyle *style, gchar const *str)
2421 {
2422 /* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */
2423 style->stroke_dasharray_set = TRUE;
2425 if (strcmp(str, "inherit") == 0) {
2426 style->stroke_dasharray_inherit = true;
2427 return;
2428 }
2429 style->stroke_dasharray_inherit = false;
2431 NRVpathDash &dash = style->stroke_dash;
2432 g_free(dash.dash);
2433 dash.dash = NULL;
2435 if (strcmp(str, "none") == 0) {
2436 dash.n_dash = 0;
2437 return;
2438 }
2440 gint n_dash = 0;
2441 gdouble d[64];
2442 gchar *e = NULL;
2444 bool LineSolid=true;
2445 while (e != str && n_dash < 64) {
2446 /* TODO: Should allow <length> rather than just a unitless (px) number. */
2447 d[n_dash] = g_ascii_strtod(str, (char **) &e);
2448 if (d[n_dash] > 0.00000001)
2449 LineSolid = false;
2450 if (e != str) {
2451 n_dash += 1;
2452 str = e;
2453 }
2454 while (str && *str && !isalnum(*str)) str += 1;
2455 }
2457 if (LineSolid) {
2458 dash.n_dash = 0;
2459 return;
2460 }
2462 if (n_dash > 0) {
2463 dash.dash = g_new(gdouble, n_dash);
2464 memcpy(dash.dash, d, sizeof(gdouble) * n_dash);
2465 dash.n_dash = n_dash;
2466 }
2467 }
2470 /*#########################
2471 ## SPTextStyle operations
2472 #########################*/
2475 /**
2476 * Return new SPTextStyle object with default settings.
2477 */
2478 static SPTextStyle *
2479 sp_text_style_new()
2480 {
2481 SPTextStyle *ts = g_new0(SPTextStyle, 1);
2482 ts->refcount = 1;
2483 sp_text_style_clear(ts);
2485 ts->font.value = g_strdup("Bitstream Vera Sans");
2486 ts->font_family.value = g_strdup("Bitstream Vera Sans");
2488 return ts;
2489 }
2492 /**
2493 * Clear text style settings.
2494 */
2495 static void
2496 sp_text_style_clear(SPTextStyle *ts)
2497 {
2498 ts->font.set = FALSE;
2499 ts->font_family.set = FALSE;
2500 }
2504 /**
2505 * Reduce refcount of text style and possibly free it.
2506 */
2507 static SPTextStyle *
2508 sp_text_style_unref(SPTextStyle *st)
2509 {
2510 st->refcount -= 1;
2512 if (st->refcount < 1) {
2513 g_free(st->font.value);
2514 g_free(st->font_family.value);
2515 g_free(st);
2516 }
2518 return NULL;
2519 }
2523 /**
2524 * Return duplicate of text style.
2525 */
2526 static SPTextStyle *
2527 sp_text_style_duplicate_unset(SPTextStyle *st)
2528 {
2529 SPTextStyle *nt = g_new0(SPTextStyle, 1);
2530 nt->refcount = 1;
2532 nt->font.value = g_strdup(st->font.value);
2533 nt->font_family.value = g_strdup(st->font_family.value);
2535 return nt;
2536 }
2540 /**
2541 * Write SPTextStyle object into string.
2542 */
2543 static guint
2544 sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags)
2545 {
2546 gint d = 0;
2548 // We do not do diffing for text style
2549 if (flags == SP_STYLE_FLAG_IFDIFF)
2550 flags = SP_STYLE_FLAG_IFSET;
2552 d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags);
2553 return d;
2554 }
2558 /* The following sp_tyle_read_* functions ignore invalid values, as per
2559 * http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors.
2560 *
2561 * [However, the SVG spec is somewhat unclear as to whether the style attribute should
2562 * be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE
2563 * pairs, in which case SVG's error-handling rules
2564 * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.]
2565 */
2568 /**
2569 * Set SPIFloat object from string.
2570 */
2571 static void
2572 sp_style_read_ifloat(SPIFloat *val, gchar const *str)
2573 {
2574 if (!strcmp(str, "inherit")) {
2575 val->set = TRUE;
2576 val->inherit = TRUE;
2577 } else {
2578 gfloat value;
2579 if (sp_svg_number_read_f(str, &value)) {
2580 val->set = TRUE;
2581 val->inherit = FALSE;
2582 val->value = value;
2583 }
2584 }
2585 }
2589 /**
2590 * Set SPIScale24 object from string.
2591 */
2592 static void
2593 sp_style_read_iscale24(SPIScale24 *val, gchar const *str)
2594 {
2595 if (!strcmp(str, "inherit")) {
2596 val->set = TRUE;
2597 val->inherit = TRUE;
2598 } else {
2599 gfloat value;
2600 if (sp_svg_number_read_f(str, &value)) {
2601 val->set = TRUE;
2602 val->inherit = FALSE;
2603 value = CLAMP(value, 0.0f, (gfloat) SP_SCALE24_MAX);
2604 val->value = SP_SCALE24_FROM_FLOAT(value);
2605 }
2606 }
2607 }
2609 /**
2610 * Reads a style value and performs lookup based on the given style value enumerations.
2611 */
2612 static void
2613 sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict,
2614 bool const can_explicitly_inherit)
2615 {
2616 if ( can_explicitly_inherit && !strcmp(str, "inherit") ) {
2617 val->set = TRUE;
2618 val->inherit = TRUE;
2619 } else {
2620 for (unsigned i = 0; dict[i].key; i++) {
2621 if (!strcmp(str, dict[i].key)) {
2622 val->set = TRUE;
2623 val->inherit = FALSE;
2624 val->value = dict[i].value;
2625 /* Save copying for values not needing it */
2626 val->computed = val->value;
2627 break;
2628 }
2629 }
2630 }
2631 }
2635 /**
2636 * Set SPIString object from string.
2637 */
2638 static void
2639 sp_style_read_istring(SPIString *val, gchar const *str)
2640 {
2641 g_free(val->value);
2643 if (!strcmp(str, "inherit")) {
2644 val->set = TRUE;
2645 val->inherit = TRUE;
2646 val->value = NULL;
2647 } else {
2648 val->set = TRUE;
2649 val->inherit = FALSE;
2650 val->value = g_strdup(str);
2651 }
2652 }
2656 /**
2657 * Set SPILength object from string.
2658 */
2659 static void
2660 sp_style_read_ilength(SPILength *val, gchar const *str)
2661 {
2662 if (!strcmp(str, "inherit")) {
2663 val->set = TRUE;
2664 val->inherit = TRUE;
2665 } else {
2666 gdouble value;
2667 gchar *e;
2668 /** \todo fixme: Move this to standard place (Lauris) */
2669 value = g_ascii_strtod(str, &e);
2670 if ((gchar const *) e != str) {
2671 /** \todo
2672 * Allow the number of px per inch to vary (document preferences,
2673 * X server or whatever). E.g. don't fill in computed here, do
2674 * it at the same time as percentage units are done.
2675 */
2676 if (!*e) {
2677 /* Userspace */
2678 val->unit = SP_CSS_UNIT_NONE;
2679 val->computed = value;
2680 } else if (!strcmp(e, "px")) {
2681 /* Userspace */
2682 val->unit = SP_CSS_UNIT_PX;
2683 val->computed = value;
2684 } else if (!strcmp(e, "pt")) {
2685 /* Userspace / DEVICESCALE */
2686 val->unit = SP_CSS_UNIT_PT;
2687 val->computed = value * PX_PER_PT;
2688 } else if (!strcmp(e, "pc")) {
2689 /* 1 pica = 12pt; FIXME: add it to SPUnit */
2690 val->unit = SP_CSS_UNIT_PC;
2691 val->computed = value * PX_PER_PT * 12;
2692 } else if (!strcmp(e, "mm")) {
2693 val->unit = SP_CSS_UNIT_MM;
2694 val->computed = value * PX_PER_MM;
2695 } else if (!strcmp(e, "cm")) {
2696 val->unit = SP_CSS_UNIT_CM;
2697 val->computed = value * PX_PER_CM;
2698 } else if (!strcmp(e, "in")) {
2699 val->unit = SP_CSS_UNIT_IN;
2700 val->computed = value * PX_PER_IN;
2701 } else if (!strcmp(e, "em")) {
2702 /* EM square */
2703 val->unit = SP_CSS_UNIT_EM;
2704 val->value = value;
2705 } else if (!strcmp(e, "ex")) {
2706 /* ex square */
2707 val->unit = SP_CSS_UNIT_EX;
2708 val->value = value;
2709 } else if (!strcmp(e, "%")) {
2710 /* Percentage */
2711 val->unit = SP_CSS_UNIT_PERCENT;
2712 val->value = value * 0.01;
2713 } else {
2714 /* Invalid */
2715 return;
2716 }
2717 val->set = TRUE;
2718 val->inherit = FALSE;
2719 }
2720 }
2721 }
2723 /**
2724 * Set SPILengthOrNormal object from string.
2725 */
2726 static void
2727 sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str)
2728 {
2729 if (!strcmp(str, "normal")) {
2730 val->set = TRUE;
2731 val->inherit = FALSE;
2732 val->normal = TRUE;
2733 val->unit = SP_CSS_UNIT_NONE;
2734 val->value = val->computed = 0.0;
2735 } else {
2736 SPILength length;
2737 sp_style_read_ilength(&length, str);
2738 val->set = length.set;
2739 val->inherit = length.inherit;
2740 val->normal = FALSE;
2741 val->unit = length.unit;
2742 val->value = length.value;
2743 val->computed = length.computed;
2744 }
2745 }
2747 /**
2748 * Set SPITextDecoration object from string.
2749 */
2750 static void
2751 sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str)
2752 {
2753 if (!strcmp(str, "inherit")) {
2754 val->set = TRUE;
2755 val->inherit = TRUE;
2756 } else if (!strcmp(str, "none")) {
2757 val->set = TRUE;
2758 val->inherit = FALSE;
2759 val->underline = FALSE;
2760 val->overline = FALSE;
2761 val->line_through = FALSE;
2762 val->blink = FALSE;
2763 } else {
2764 bool found_underline = false;
2765 bool found_overline = false;
2766 bool found_line_through = false;
2767 bool found_blink = false;
2768 for ( ; *str ; str++ ) {
2769 if (*str == ' ') continue;
2770 if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) {
2771 found_underline = true;
2772 str += 9;
2773 } else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) {
2774 found_overline = true;
2775 str += 8;
2776 } else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) {
2777 found_line_through = true;
2778 str += 12;
2779 } else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) {
2780 found_blink = true;
2781 str += 5;
2782 } else {
2783 return; // invalid value
2784 }
2785 }
2786 if (!(found_underline || found_overline || found_line_through || found_blink)) {
2787 return; // invalid value: empty
2788 }
2789 val->set = TRUE;
2790 val->inherit = FALSE;
2791 val->underline = found_underline;
2792 val->overline = found_overline;
2793 val->line_through = found_line_through;
2794 val->blink = found_blink;
2795 }
2796 }
2798 /**
2799 * Set SPIPaint object from string containing an integer value.
2800 * \param document Ignored
2801 */
2802 static void
2803 sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2804 {
2805 paint->currentcolor = FALSE; /* currentColor not a valid <color>. */
2806 if (!strcmp(str, "inherit")) {
2807 paint->set = TRUE;
2808 paint->inherit = TRUE;
2809 } else {
2810 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
2811 if (rgb0 != 0xff) {
2812 paint->type = SP_PAINT_TYPE_COLOR;
2813 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2814 paint->set = TRUE;
2815 paint->inherit = FALSE;
2816 }
2817 }
2818 }
2821 /**
2822 * Set SPIPaint object from string.
2823 */
2824 static void
2825 sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2826 {
2827 while (isspace(*str)) {
2828 ++str;
2829 }
2831 if (streq(str, "inherit")) {
2832 paint->set = TRUE;
2833 paint->inherit = TRUE;
2834 paint->currentcolor = FALSE;
2835 } else if (streq(str, "currentColor")) {
2836 paint->set = TRUE;
2837 paint->inherit = FALSE;
2838 paint->currentcolor = TRUE;
2839 } else if (streq(str, "none")) {
2840 paint->type = SP_PAINT_TYPE_NONE;
2841 paint->set = TRUE;
2842 paint->inherit = FALSE;
2843 paint->currentcolor = FALSE;
2844 } else if (strneq(str, "url", 3)) {
2845 // this is alloc'd uri, but seems to be shared with a parent
2846 // potentially, so it's not any easy g_free case...
2847 paint->value.paint.uri = extract_uri(str);
2848 if (paint->value.paint.uri == NULL || *(paint->value.paint.uri) == '\0') {
2849 paint->type = SP_PAINT_TYPE_NONE;
2850 return;
2851 }
2852 paint->type = SP_PAINT_TYPE_PAINTSERVER;
2853 paint->set = TRUE;
2854 paint->inherit = FALSE;
2855 paint->currentcolor = FALSE;
2856 if (document) {
2857 SPObject *ps = sp_uri_reference_resolve(document, str);
2858 if (ps && SP_IS_PAINT_SERVER(ps)) {
2859 paint->value.paint.server = SP_PAINT_SERVER(ps);
2860 if (style->object && !style->cloned) {
2861 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
2862 style->hreffed = true;
2863 }
2864 if (style->object || style->cloned) {
2865 g_signal_connect(G_OBJECT(paint->value.paint.server), "release",
2866 G_CALLBACK(sp_style_paint_server_release), style);
2867 g_signal_connect(G_OBJECT(paint->value.paint.server), "modified",
2868 G_CALLBACK(sp_style_paint_server_modified), style);
2869 style->listening = true;
2870 }
2871 } else {
2872 paint->value.paint.server = NULL;
2873 }
2874 }
2875 } else {
2876 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
2877 if (rgb0 != 0xff) {
2878 paint->type = SP_PAINT_TYPE_COLOR;
2879 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2880 paint->set = TRUE;
2881 paint->inherit = FALSE;
2882 paint->currentcolor = FALSE;
2883 }
2884 }
2885 }
2889 /**
2890 * Set SPIFontSize object from string.
2891 */
2892 static void
2893 sp_style_read_ifontsize(SPIFontSize *val, gchar const *str)
2894 {
2895 if (!strcmp(str, "inherit")) {
2896 val->set = TRUE;
2897 val->inherit = TRUE;
2898 } else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) {
2899 for (unsigned i = 0; enum_font_size[i].key; i++) {
2900 if (!strcmp(str, enum_font_size[i].key)) {
2901 val->set = TRUE;
2902 val->inherit = FALSE;
2903 val->type = SP_FONT_SIZE_LITERAL;
2904 val->value = enum_font_size[i].value;
2905 return;
2906 }
2907 }
2908 /* Invalid */
2909 return;
2910 } else {
2911 gdouble value;
2912 gchar *e;
2913 /* fixme: Move this to standard place (Lauris) */
2914 value = g_ascii_strtod(str, &e);
2915 if ((gchar const *) e != str) {
2916 if (!*e) {
2917 /* Userspace */
2918 } else if (!strcmp(e, "px")) {
2919 /* Userspace */
2920 } else if (!strcmp(e, "pt")) {
2921 /* Userspace * DEVICESCALE */
2922 value *= PX_PER_PT;
2923 } else if (!strcmp(e, "pc")) {
2924 /* 12pt */
2925 value *= PX_PER_PT * 12.0;
2926 } else if (!strcmp(e, "mm")) {
2927 value *= PX_PER_MM;
2928 } else if (!strcmp(e, "cm")) {
2929 value *= PX_PER_CM;
2930 } else if (!strcmp(e, "in")) {
2931 value *= PX_PER_IN;
2932 } else if (!strcmp(e, "%")) {
2933 /* Percentage */
2934 val->set = TRUE;
2935 val->inherit = FALSE;
2936 val->type = SP_FONT_SIZE_PERCENTAGE;
2937 val->value = SP_F8_16_FROM_FLOAT(value / 100.0);
2938 return;
2939 } else {
2940 /* Invalid */
2941 return;
2942 }
2943 /* Length */
2944 val->set = TRUE;
2945 val->inherit = FALSE;
2946 val->type = SP_FONT_SIZE_LENGTH;
2947 val->computed = value;
2948 return;
2949 }
2950 }
2951 }
2955 /**
2956 * Set SPIEnum object from repr attribute.
2957 */
2958 static void
2959 sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr,
2960 gchar const *key, SPStyleEnum const *dict,
2961 bool const can_explicitly_inherit)
2962 {
2963 gchar const *str = repr->attribute(key);
2964 if (str) {
2965 sp_style_read_ienum(val, str, dict, can_explicitly_inherit);
2966 }
2967 }
2971 /**
2972 * Set SPILength object from repr attribute.
2973 */
2974 static void
2975 sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key)
2976 {
2977 gchar const *str = repr->attribute(key);
2978 if (str) {
2979 sp_style_read_ilength(val, str);
2980 }
2981 }
2983 /**
2984 * Set SPIFontSize object from repr attribute.
2985 */
2986 static void
2987 sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key)
2988 {
2989 gchar const *str = repr->attribute(key);
2990 if (str) {
2991 sp_style_read_ifontsize(val, str);
2992 }
2993 }
2996 /**
2997 * Set SPIFloat object from repr attribute.
2998 */
2999 static void
3000 sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key)
3001 {
3002 gchar const *str = repr->attribute(key);
3003 if (str) {
3004 sp_style_read_ifloat(val, str);
3005 }
3006 }
3009 /**
3010 * Write SPIFloat object into string.
3011 */
3012 static gint
3013 sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key,
3014 SPIFloat const *const val, SPIFloat const *const base, guint const flags)
3015 {
3016 Inkscape::CSSOStringStream os;
3018 if ((flags & SP_STYLE_FLAG_ALWAYS)
3019 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3020 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3021 && (!base->set || (val->value != base->value))))
3022 {
3023 if (val->inherit) {
3024 return g_snprintf(p, len, "%s:inherit;", key);
3025 } else {
3026 os << key << ":" << val->value << ";";
3027 return g_strlcpy(p, os.str().c_str(), len);
3028 }
3029 }
3030 return 0;
3031 }
3034 /**
3035 * Write SPIScale24 object into string.
3036 */
3037 static gint
3038 sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key,
3039 SPIScale24 const *const val, SPIScale24 const *const base,
3040 guint const flags)
3041 {
3042 Inkscape::CSSOStringStream os;
3044 if ((flags & SP_STYLE_FLAG_ALWAYS)
3045 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3046 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3047 && (!base->set || (val->value != base->value))))
3048 {
3049 if (val->inherit) {
3050 return g_snprintf(p, len, "%s:inherit;", key);
3051 } else {
3052 os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";";
3053 return g_strlcpy(p, os.str().c_str(), len);
3054 }
3055 }
3056 return 0;
3057 }
3060 /**
3061 * Write SPIEnum object into string.
3062 */
3063 static gint
3064 sp_style_write_ienum(gchar *p, gint const len, gchar const *const key,
3065 SPStyleEnum const *const dict,
3066 SPIEnum const *const val, SPIEnum const *const base, guint const flags)
3067 {
3068 if ((flags & SP_STYLE_FLAG_ALWAYS)
3069 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3070 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3071 && (!base->set || (val->computed != base->computed))))
3072 {
3073 if (val->inherit) {
3074 return g_snprintf(p, len, "%s:inherit;", key);
3075 }
3076 for (unsigned i = 0; dict[i].key; i++) {
3077 if (dict[i].value == static_cast< gint > (val->value) ) {
3078 return g_snprintf(p, len, "%s:%s;", key, dict[i].key);
3079 }
3080 }
3081 }
3082 return 0;
3083 }
3087 /**
3088 * Write SPIString object into string.
3089 */
3090 static gint
3091 sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
3092 SPIString const *const val, SPIString const *const base, guint const flags)
3093 {
3094 if ((flags & SP_STYLE_FLAG_ALWAYS)
3095 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3096 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3097 && (!base->set || strcmp(val->value, base->value))))
3098 {
3099 if (val->inherit) {
3100 return g_snprintf(p, len, "%s:inherit;", key);
3101 } else {
3102 return g_snprintf(p, len, "%s:%s;", key, val->value);
3103 }
3104 }
3105 return 0;
3106 }
3109 /**
3110 *
3111 */
3112 static bool
3113 sp_length_differ(SPILength const *const a, SPILength const *const b)
3114 {
3115 if (a->unit != b->unit) {
3116 if (a->unit == SP_CSS_UNIT_EM) return true;
3117 if (a->unit == SP_CSS_UNIT_EX) return true;
3118 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3119 if (b->unit == SP_CSS_UNIT_EM) return true;
3120 if (b->unit == SP_CSS_UNIT_EX) return true;
3121 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3122 }
3124 return (a->computed != b->computed);
3125 }
3129 /**
3130 * Write SPILength object into string.
3131 */
3132 static gint
3133 sp_style_write_ilength(gchar *p, gint const len, gchar const *const key,
3134 SPILength const *const val, SPILength const *const base, guint const flags)
3135 {
3136 Inkscape::CSSOStringStream os;
3138 if ((flags & SP_STYLE_FLAG_ALWAYS)
3139 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3140 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3141 && (!base->set || sp_length_differ(val, base))))
3142 {
3143 if (val->inherit) {
3144 return g_snprintf(p, len, "%s:inherit;", key);
3145 } else {
3146 switch (val->unit) {
3147 case SP_CSS_UNIT_NONE:
3148 os << key << ":" << val->computed << ";";
3149 return g_strlcpy(p, os.str().c_str(), len);
3150 break;
3151 case SP_CSS_UNIT_PX:
3152 os << key << ":" << val->computed << "px;";
3153 return g_strlcpy(p, os.str().c_str(), len);
3154 break;
3155 case SP_CSS_UNIT_PT:
3156 os << key << ":" << val->computed * PT_PER_PX << "pt;";
3157 return g_strlcpy(p, os.str().c_str(), len);
3158 break;
3159 case SP_CSS_UNIT_PC:
3160 os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;";
3161 return g_strlcpy(p, os.str().c_str(), len);
3162 break;
3163 case SP_CSS_UNIT_MM:
3164 os << key << ":" << val->computed * MM_PER_PX << "mm;";
3165 return g_strlcpy(p, os.str().c_str(), len);
3166 break;
3167 case SP_CSS_UNIT_CM:
3168 os << key << ":" << val->computed * CM_PER_PX << "cm;";
3169 return g_strlcpy(p, os.str().c_str(), len);
3170 break;
3171 case SP_CSS_UNIT_IN:
3172 os << key << ":" << val->computed * IN_PER_PX << "in;";
3173 return g_strlcpy(p, os.str().c_str(), len);
3174 break;
3175 case SP_CSS_UNIT_EM:
3176 os << key << ":" << val->value << "em;";
3177 return g_strlcpy(p, os.str().c_str(), len);
3178 break;
3179 case SP_CSS_UNIT_EX:
3180 os << key << ":" << val->value << "ex;";
3181 return g_strlcpy(p, os.str().c_str(), len);
3182 break;
3183 case SP_CSS_UNIT_PERCENT:
3184 os << key << ":" << (val->value * 100.0) << "%;";
3185 return g_strlcpy(p, os.str().c_str(), len);
3186 break;
3187 default:
3188 /* Invalid */
3189 break;
3190 }
3191 }
3192 }
3193 return 0;
3194 }
3197 /**
3198 *
3199 */
3200 static bool
3201 sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b)
3202 {
3203 if (a->normal != b->normal) return true;
3204 if (a->normal) return false;
3206 if (a->unit != b->unit) {
3207 if (a->unit == SP_CSS_UNIT_EM) return true;
3208 if (a->unit == SP_CSS_UNIT_EX) return true;
3209 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3210 if (b->unit == SP_CSS_UNIT_EM) return true;
3211 if (b->unit == SP_CSS_UNIT_EX) return true;
3212 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3213 }
3215 return (a->computed != b->computed);
3216 }
3218 /**
3219 * Write SPILengthOrNormal object into string.
3220 */
3221 static gint
3222 sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key,
3223 SPILengthOrNormal const *const val,
3224 SPILengthOrNormal const *const base,
3225 guint const flags)
3226 {
3227 if ((flags & SP_STYLE_FLAG_ALWAYS)
3228 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3229 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3230 && (!base->set || sp_lengthornormal_differ(val, base))))
3231 {
3232 if (val->normal) {
3233 return g_snprintf(p, len, "%s:normal;", key);
3234 } else {
3235 SPILength length;
3236 length.set = val->set;
3237 length.inherit = val->inherit;
3238 length.unit = val->unit;
3239 length.value = val->value;
3240 length.computed = val->computed;
3241 return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS);
3242 }
3243 }
3244 return 0;
3245 }
3247 /**
3248 *
3249 */
3250 static bool
3251 sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b)
3252 {
3253 return a->underline != b->underline
3254 || a->overline != b->overline
3255 || a->line_through != b->line_through
3256 || a->blink != b->blink;
3257 }
3259 /**
3260 * Write SPITextDecoration object into string.
3261 */
3262 static gint
3263 sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key,
3264 SPITextDecoration const *const val,
3265 SPITextDecoration const *const base,
3266 guint const flags)
3267 {
3268 Inkscape::CSSOStringStream os;
3270 if ((flags & SP_STYLE_FLAG_ALWAYS)
3271 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3272 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3273 && (!base->set || sp_textdecoration_differ(val, base))))
3274 {
3275 if (val->inherit) {
3276 return g_snprintf(p, len, "%s:inherit;", key);
3277 } else {
3278 os << key << ":";
3279 if (val->underline || val->overline || val->line_through || val->blink) {
3280 if (val->underline) os << " underline";
3281 if (val->overline) os << " overline";
3282 if (val->line_through) os << " line-through";
3283 if (val->blink) os << " blink";
3284 } else
3285 os << "none";
3286 os << ";";
3287 return g_strlcpy(p, os.str().c_str(), len);
3288 }
3289 }
3290 return 0;
3291 }
3293 /**
3294 *
3295 */
3296 static bool
3297 sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
3298 {
3299 if (a->type != b->type)
3300 return true;
3301 if (a->type == SP_PAINT_TYPE_COLOR)
3302 return !sp_color_is_equal(&a->value.color, &b->value.color);
3303 if (a->type == SP_PAINT_TYPE_PAINTSERVER)
3304 return (a->value.paint.server != b->value.paint.server);
3305 return false;
3306 }
3310 /**
3311 * Write SPIPaint object into string.
3312 */
3313 static gint
3314 sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
3315 SPIPaint const *const paint, SPIPaint const *const base, guint const flags)
3316 {
3317 if ((flags & SP_STYLE_FLAG_ALWAYS)
3318 || ((flags & SP_STYLE_FLAG_IFSET) && paint->set)
3319 || ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set
3320 && (!base->set || sp_paint_differ(paint, base))))
3321 {
3322 if (paint->inherit) {
3323 return g_snprintf(b, len, "%s:inherit;", key);
3324 } else if (paint->currentcolor) {
3325 return g_snprintf(b, len, "%s:currentColor;", key);
3326 } else {
3327 switch (paint->type) {
3328 case SP_PAINT_TYPE_COLOR:
3329 return g_snprintf(b, len, "%s:#%06x;", key, sp_color_get_rgba32_falpha(&paint->value.color, 0.0) >> 8);
3330 break;
3331 case SP_PAINT_TYPE_PAINTSERVER:
3332 return g_snprintf(b, len, "%s:url(%s);", key, paint->value.paint.uri);
3333 break;
3334 default:
3335 break;
3336 }
3337 return g_snprintf(b, len, "%s:none;", key);
3338 }
3339 }
3340 return 0;
3341 }
3344 /**
3345 *
3346 */
3347 static bool
3348 sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b)
3349 {
3350 if (a->type != b->type)
3351 return true;
3352 if (a->type == SP_FONT_SIZE_LENGTH) {
3353 if (a->computed != b->computed)
3354 return true;
3355 } else {
3356 if (a->value != b->value)
3357 return true;
3358 }
3359 return false;
3360 }
3363 /**
3364 * Write SPIFontSize object into string.
3365 */
3366 static gint
3367 sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key,
3368 SPIFontSize const *const val, SPIFontSize const *const base,
3369 guint const flags)
3370 {
3371 if ((flags & SP_STYLE_FLAG_ALWAYS)
3372 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3373 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3374 && (!base->set || sp_fontsize_differ(val, base))))
3375 {
3376 if (val->inherit) {
3377 return g_snprintf(p, len, "%s:inherit;", key);
3378 } else if (val->type == SP_FONT_SIZE_LITERAL) {
3379 for (unsigned i = 0; enum_font_size[i].key; i++) {
3380 if (enum_font_size[i].value == static_cast< gint > (val->value) ) {
3381 return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key);
3382 }
3383 }
3384 } else if (val->type == SP_FONT_SIZE_LENGTH) {
3385 Inkscape::CSSOStringStream os;
3386 os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
3387 return g_strlcpy(p, os.str().c_str(), len);
3388 } else if (val->type == SP_FONT_SIZE_PERCENTAGE) {
3389 Inkscape::CSSOStringStream os;
3390 os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;";
3391 return g_strlcpy(p, os.str().c_str(), len);
3392 }
3393 }
3394 return 0;
3395 }
3398 /**
3399 * Clear paint object; conditionally disconnect style from paintserver.
3400 */
3401 static void
3402 sp_style_paint_clear(SPStyle *style, SPIPaint *paint,
3403 unsigned hunref, unsigned unset)
3404 {
3405 if (hunref && (paint->type == SP_PAINT_TYPE_PAINTSERVER) && paint->value.paint.server) {
3406 if (style->hreffed) {
3407 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3408 style->hreffed = false;
3409 }
3410 if (style->listening) {
3411 g_signal_handlers_disconnect_matched(G_OBJECT(paint->value.paint.server),
3412 G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style);
3413 style->listening = false;
3414 }
3415 paint->value.paint.server = NULL;
3416 paint->value.paint.uri = NULL;
3417 paint->type = SP_PAINT_TYPE_NONE;
3418 }
3420 if (unset) {
3421 paint->set = FALSE;
3422 paint->inherit = FALSE;
3423 }
3424 }
3426 /**
3427 * Clear all style property attributes in object.
3428 */
3429 void
3430 sp_style_unset_property_attrs(SPObject *o)
3431 {
3432 if (!o) return;
3434 SPStyle *style = SP_OBJECT_STYLE(o);
3435 if (!style) return;
3437 Inkscape::XML::Node *repr = SP_OBJECT_REPR(o);
3438 if (!repr) return;
3440 if (style->opacity.set) {
3441 repr->setAttribute("opacity", NULL);
3442 }
3443 if (style->color.set) {
3444 repr->setAttribute("color", NULL);
3445 }
3446 if (style->fill.set) {
3447 repr->setAttribute("fill", NULL);
3448 }
3449 if (style->fill_opacity.set) {
3450 repr->setAttribute("fill-opacity", NULL);
3451 }
3452 if (style->fill_rule.set) {
3453 repr->setAttribute("fill-rule", NULL);
3454 }
3455 if (style->stroke.set) {
3456 repr->setAttribute("stroke", NULL);
3457 }
3458 if (style->stroke_width.set) {
3459 repr->setAttribute("stroke-width", NULL);
3460 }
3461 if (style->stroke_linecap.set) {
3462 repr->setAttribute("stroke-linecap", NULL);
3463 }
3464 if (style->stroke_linejoin.set) {
3465 repr->setAttribute("stroke-linejoin", NULL);
3466 }
3467 if (style->marker[SP_MARKER_LOC].set) {
3468 repr->setAttribute("marker", NULL);
3469 }
3470 if (style->marker[SP_MARKER_LOC_START].set) {
3471 repr->setAttribute("marker-start", NULL);
3472 }
3473 if (style->marker[SP_MARKER_LOC_MID].set) {
3474 repr->setAttribute("marker-mid", NULL);
3475 }
3476 if (style->marker[SP_MARKER_LOC_END].set) {
3477 repr->setAttribute("marker-end", NULL);
3478 }
3479 if (style->stroke_opacity.set) {
3480 repr->setAttribute("stroke-opacity", NULL);
3481 }
3482 if (style->stroke_dasharray_set) {
3483 repr->setAttribute("stroke-dasharray", NULL);
3484 }
3485 if (style->stroke_dashoffset_set) {
3486 repr->setAttribute("stroke-dashoffset", NULL);
3487 }
3488 if (style->text_private && style->text->font_family.set) {
3489 repr->setAttribute("font-family", NULL);
3490 }
3491 if (style->text_anchor.set) {
3492 repr->setAttribute("text-anchor", NULL);
3493 }
3494 if (style->writing_mode.set) {
3495 repr->setAttribute("writing_mode", NULL);
3496 }
3497 }
3499 /**
3500 * \pre style != NULL.
3501 * \pre flags in {IFSET, ALWAYS}.
3502 */
3503 SPCSSAttr *
3504 sp_css_attr_from_style(SPStyle const *const style, guint const flags)
3505 {
3506 g_return_val_if_fail(style != NULL, NULL);
3507 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3508 (flags == SP_STYLE_FLAG_ALWAYS) ),
3509 NULL);
3510 gchar *style_str = sp_style_write_string(style, flags);
3511 SPCSSAttr *css = sp_repr_css_attr_new();
3512 sp_repr_css_attr_add_from_string(css, style_str);
3513 g_free(style_str);
3514 return css;
3515 }
3518 /**
3519 * \pre object != NULL
3520 * \pre flags in {IFSET, ALWAYS}.
3521 */
3522 SPCSSAttr *
3523 sp_css_attr_from_object(SPObject *object, guint const flags)
3524 {
3525 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3526 (flags == SP_STYLE_FLAG_ALWAYS) ),
3527 NULL);
3528 SPStyle const *const style = SP_OBJECT_STYLE(object);
3529 if (style == NULL)
3530 return NULL;
3531 return sp_css_attr_from_style (style, flags);
3532 }
3534 /**
3535 * Unset any text-related properties
3536 */
3537 SPCSSAttr *
3538 sp_css_attr_unset_text(SPCSSAttr *css)
3539 {
3540 sp_repr_css_set_property(css, "font", NULL); // not implemented yet
3541 sp_repr_css_set_property(css, "font-size", NULL);
3542 sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet
3543 sp_repr_css_set_property(css, "font-style", NULL);
3544 sp_repr_css_set_property(css, "font-variant", NULL);
3545 sp_repr_css_set_property(css, "font-weight", NULL);
3546 sp_repr_css_set_property(css, "font-stretch", NULL);
3547 sp_repr_css_set_property(css, "font-family", NULL);
3548 sp_repr_css_set_property(css, "text-indent", NULL);
3549 sp_repr_css_set_property(css, "text-align", NULL);
3550 sp_repr_css_set_property(css, "text-decoration", NULL);
3551 sp_repr_css_set_property(css, "line-height", NULL);
3552 sp_repr_css_set_property(css, "letter-spacing", NULL);
3553 sp_repr_css_set_property(css, "word-spacing", NULL);
3554 sp_repr_css_set_property(css, "text-transform", NULL);
3555 sp_repr_css_set_property(css, "direction", NULL);
3556 sp_repr_css_set_property(css, "block-progression", NULL);
3557 sp_repr_css_set_property(css, "writing-mode", NULL);
3558 sp_repr_css_set_property(css, "text-anchor", NULL);
3559 sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet
3560 sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet
3561 sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet
3562 sp_repr_css_set_property(css, "baseline-shift", NULL); // not implemented yet
3564 return css;
3565 }
3567 bool
3568 is_url(char const *p)
3569 {
3570 if (p == NULL)
3571 return false;
3572 /** \todo
3573 * FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs
3574 * in property values must start with 'url('.
3575 */
3576 return (g_ascii_strncasecmp(p, "url(", 4) == 0);
3577 }
3579 /**
3580 * Unset any properties that contain URI values.
3581 *
3582 * Used for storing style that will be reused across documents when carrying
3583 * the referenced defs is impractical.
3584 */
3585 SPCSSAttr *
3586 sp_css_attr_unset_uris(SPCSSAttr *css)
3587 {
3588 // All properties that may hold <uri> or <paint> according to SVG 1.1
3589 if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL);
3590 if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL);
3591 if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL);
3592 if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL);
3593 if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL);
3594 if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL);
3595 if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL);
3596 if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL);
3597 if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL);
3598 if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL);
3600 return css;
3601 }
3603 /**
3604 * Scale a single-value property.
3605 */
3606 void
3607 sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property,
3608 double ex, bool only_with_units = false)
3609 {
3610 gchar const *w = sp_repr_css_property(css, property, NULL);
3611 if (w) {
3612 gchar *units = NULL;
3613 double wd = g_ascii_strtod(w, &units) * ex;
3614 if (w == units) {// nothing converted, non-numeric value
3615 return;
3616 }
3617 if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) {
3618 // only_with_units, but no units found, so do nothing.
3619 return;
3620 }
3621 Inkscape::CSSOStringStream os;
3622 os << wd << units; // reattach units
3623 sp_repr_css_set_property(css, property, os.str().c_str());
3624 }
3625 }
3627 /**
3628 * Scale a list-of-values property.
3629 */
3630 void
3631 sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex)
3632 {
3633 gchar const *string = sp_repr_css_property(css, property, NULL);
3634 if (string) {
3635 Inkscape::CSSOStringStream os;
3636 gchar **a = g_strsplit(string, ",", 10000);
3637 bool first = true;
3638 for (gchar **i = a; i != NULL; i++) {
3639 gchar *w = *i;
3640 if (w == NULL)
3641 break;
3642 gchar *units = NULL;
3643 double wd = g_ascii_strtod(w, &units) * ex;
3644 if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing
3645 g_strfreev(a);
3646 return;
3647 }
3648 if (!first) {
3649 os << ",";
3650 }
3651 os << wd << units; // reattach units
3652 first = false;
3653 }
3654 sp_repr_css_set_property(css, property, os.str().c_str());
3655 g_strfreev(a);
3656 }
3657 }
3659 /**
3660 * Scale any properties that may hold <length> by ex.
3661 */
3662 SPCSSAttr *
3663 sp_css_attr_scale(SPCSSAttr *css, double ex)
3664 {
3665 sp_css_attr_scale_property_single(css, "baseline-shift", ex);
3666 sp_css_attr_scale_property_single(css, "stroke-width", ex);
3667 sp_css_attr_scale_property_list (css, "stroke-dasharray", ex);
3668 sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex);
3669 sp_css_attr_scale_property_single(css, "font-size", ex);
3670 sp_css_attr_scale_property_single(css, "kerning", ex);
3671 sp_css_attr_scale_property_single(css, "letter-spacing", ex);
3672 sp_css_attr_scale_property_single(css, "word-spacing", ex);
3673 sp_css_attr_scale_property_single(css, "line-height", ex, true);
3675 return css;
3676 }
3679 /**
3680 * Remove quotes from SPIString object value.
3681 *
3682 * \todo FIXME: now used for font family, but perhaps this should apply to
3683 * ALL strings (check CSS spec), in which case this should be part of
3684 * read_istring.
3685 */
3686 void
3687 css2_unescape_unquote (SPIString *val)
3688 {
3689 if (val->set && val->value && strlen(val->value) >= 2) {
3691 /// \todo unescape all \-escaped chars
3693 int l = strlen(val->value);
3694 if ((val->value[0] == '"' && val->value[l - 1] == '"') ||
3695 (val->value[0] == '\'' && val->value[l - 1] == '\'')) {
3696 memcpy (val->value, val->value+1, l - 2);
3697 val->value[l - 2] = '\0';
3698 }
3699 }
3700 }
3703 /*
3704 Local Variables:
3705 mode:c++
3706 c-file-style:"stroustrup"
3707 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
3708 indent-tabs-mode:nil
3709 fill-column:99
3710 End:
3711 */
3712 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :