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1 #define __SP_STYLE_C__
3 /** \file
4 * SVG stylesheets implementation.
5 *
6 * Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * Peter Moulder <pmoulder@mail.csse.monash.edu.au>
9 * bulia byak <buliabyak@users.sf.net>
10 *
11 * Copyright (C) 2001-2002 Lauris Kaplinski
12 * Copyright (C) 2001 Ximian, Inc.
13 * Copyright (C) 2005 Monash University
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #ifdef HAVE_CONFIG_H
19 # include "config.h"
20 #endif
22 #include "libcroco/cr-sel-eng.h"
23 #include "xml/croco-node-iface.h"
25 #include "svg/svg.h"
26 #include "svg/svg-color.h"
27 #include "svg/svg-icc-color.h"
29 #include "display/canvas-bpath.h"
30 #include "attributes.h"
31 #include "document.h"
32 #include "extract-uri.h"
33 #include "marker-status.h"
34 #include "uri-references.h"
35 #include "sp-paint-server.h"
36 #include "streq.h"
37 #include "strneq.h"
38 #include "style.h"
39 #include "svg/css-ostringstream.h"
40 #include "xml/repr.h"
41 #include "unit-constants.h"
42 #include "isnan.h"
44 using Inkscape::CSSOStringStream;
45 using std::vector;
47 namespace Inkscape {
49 /**
50 * Parses a CSS url() specification; temporary hack until
51 * style stuff is redone.
52 * \param string the CSS string to parse
53 * \return a newly-allocated URL string (or NULL); free with g_free()
54 */
55 gchar *parse_css_url(gchar const *string) {
56 if (!string)
57 return NULL;
59 gchar const *iter = string;
60 for ( ; g_ascii_isspace(*iter) ; iter = g_utf8_next_char(iter) );
61 if (strncmp(iter, "url(", 4))
62 return NULL;
63 iter += 4;
65 gchar const end_char = *iter;
66 if ( *iter == '"' || *iter == '\'' ) {
67 iter += 1;
68 }
70 GString *temp = g_string_new(NULL);
71 for ( ; *iter ; iter = g_utf8_next_char(iter) ) {
72 if ( *iter == '(' || *iter == ')' ||
73 *iter == '"' || *iter == '\'' ||
74 g_ascii_isspace(*iter) ||
75 g_ascii_iscntrl(*iter) )
76 {
77 break;
78 }
79 if ( *iter == '\\' ) {
80 iter = g_utf8_next_char(iter);
81 }
82 if ( *iter & (gchar)0x80 ) {
83 break;
84 } else {
85 g_string_append_c(temp, *iter);
86 }
87 }
89 if ( *iter == end_char && end_char != ')' ) {
90 iter = g_utf8_next_char(iter);
91 }
92 gchar *result;
93 if ( *iter == ')' ) {
94 result = temp->str;
95 g_string_free(temp, FALSE);
96 } else {
97 result = NULL;
98 g_string_free(temp, TRUE);
99 }
101 return result;
102 }
104 }
106 #define BMAX 8192
108 class SPStyleEnum;
110 /*#########################
111 ## FORWARD DECLARATIONS
112 #########################*/
113 static void sp_style_clear(SPStyle *style);
115 static void sp_style_merge_property(SPStyle *style, gint id, gchar const *val);
117 static void sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent);
118 static void sp_style_merge_ifilter(SPIFilter *child, SPIFilter const *parent);
119 static void sp_style_read_dash(SPStyle *style, gchar const *str);
121 static SPTextStyle *sp_text_style_new(void);
122 static void sp_text_style_clear(SPTextStyle *ts);
123 static SPTextStyle *sp_text_style_unref(SPTextStyle *st);
124 static SPTextStyle *sp_text_style_duplicate_unset(SPTextStyle *st);
125 static guint sp_text_style_write(gchar *p, guint len, SPTextStyle const *st, guint flags = SP_STYLE_FLAG_IFSET);
126 static void sp_style_privatize_text(SPStyle *style);
128 static void sp_style_read_ifloat(SPIFloat *val, gchar const *str);
129 static void sp_style_read_iscale24(SPIScale24 *val, gchar const *str);
130 static void sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict, bool can_explicitly_inherit);
131 static void sp_style_read_istring(SPIString *val, gchar const *str);
132 static void sp_style_read_ilength(SPILength *val, gchar const *str);
133 static void sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str);
134 static void sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str);
135 static void sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
136 static void sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
137 static void sp_style_read_ifontsize(SPIFontSize *val, gchar const *str);
138 static void sp_style_read_ifilter(SPIFilter *f, gchar const *str, SPDocument *document);
140 static void sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr, gchar const *key, SPStyleEnum const *dict, bool can_explicitly_inherit);
141 static void sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key);
142 static void sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key);
143 static void sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key);
145 static gint sp_style_write_ifloat(gchar *p, gint len, gchar const *key, SPIFloat const *val, SPIFloat const *base, guint flags);
146 static gint sp_style_write_iscale24(gchar *p, gint len, gchar const *key, SPIScale24 const *val, SPIScale24 const *base, guint flags);
147 static gint sp_style_write_ienum(gchar *p, gint len, gchar const *key, SPStyleEnum const *dict, SPIEnum const *val, SPIEnum const *base, guint flags);
148 static gint sp_style_write_istring(gchar *p, gint len, gchar const *key, SPIString const *val, SPIString const *base, guint flags);
149 static gint sp_style_write_ilength(gchar *p, gint len, gchar const *key, SPILength const *val, SPILength const *base, guint flags);
150 static gint sp_style_write_ipaint(gchar *b, gint len, gchar const *key, SPIPaint const *paint, SPIPaint const *base, guint flags);
151 static gint sp_style_write_ifontsize(gchar *p, gint len, gchar const *key, SPIFontSize const *val, SPIFontSize const *base, guint flags);
152 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);
153 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);
155 static void css2_unescape_unquote(SPIString *val);
157 static void sp_style_paint_clear(SPStyle *style, SPIPaint *paint);
159 #define SPS_READ_IENUM_IF_UNSET(v,s,d,i) if (!(v)->set) {sp_style_read_ienum((v), (s), (d), (i));}
160 #define SPS_READ_PENUM_IF_UNSET(v,r,k,d,i) if (!(v)->set) {sp_style_read_penum((v), (r), (k), (d), (i));}
162 #define SPS_READ_ILENGTH_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ilength((v), (s));}
163 #define SPS_READ_PLENGTH_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_plength((v), (r), (k));}
165 #define SPS_READ_PFLOAT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfloat((v), (r), (k));}
167 #define SPS_READ_IFONTSIZE_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ifontsize((v), (s));}
168 #define SPS_READ_PFONTSIZE_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfontsize((v), (r), (k));}
170 static void sp_style_merge_from_object_stylesheet(SPStyle *, SPObject const *);
172 struct SPStyleEnum {
173 gchar const *key;
174 gint value;
175 };
177 static SPStyleEnum const enum_fill_rule[] = {
178 {"nonzero", SP_WIND_RULE_NONZERO},
179 {"evenodd", SP_WIND_RULE_EVENODD},
180 {NULL, -1}
181 };
183 static SPStyleEnum const enum_stroke_linecap[] = {
184 {"butt", SP_STROKE_LINECAP_BUTT},
185 {"round", SP_STROKE_LINECAP_ROUND},
186 {"square", SP_STROKE_LINECAP_SQUARE},
187 {NULL, -1}
188 };
190 static SPStyleEnum const enum_stroke_linejoin[] = {
191 {"miter", SP_STROKE_LINEJOIN_MITER},
192 {"round", SP_STROKE_LINEJOIN_ROUND},
193 {"bevel", SP_STROKE_LINEJOIN_BEVEL},
194 {NULL, -1}
195 };
197 static SPStyleEnum const enum_font_style[] = {
198 {"normal", SP_CSS_FONT_STYLE_NORMAL},
199 {"italic", SP_CSS_FONT_STYLE_ITALIC},
200 {"oblique", SP_CSS_FONT_STYLE_OBLIQUE},
201 {NULL, -1}
202 };
204 static SPStyleEnum const enum_font_size[] = {
205 {"xx-small", SP_CSS_FONT_SIZE_XX_SMALL},
206 {"x-small", SP_CSS_FONT_SIZE_X_SMALL},
207 {"small", SP_CSS_FONT_SIZE_SMALL},
208 {"medium", SP_CSS_FONT_SIZE_MEDIUM},
209 {"large", SP_CSS_FONT_SIZE_LARGE},
210 {"x-large", SP_CSS_FONT_SIZE_X_LARGE},
211 {"xx-large", SP_CSS_FONT_SIZE_XX_LARGE},
212 {"smaller", SP_CSS_FONT_SIZE_SMALLER},
213 {"larger", SP_CSS_FONT_SIZE_LARGER},
214 {NULL, -1}
215 };
217 static SPStyleEnum const enum_font_variant[] = {
218 {"normal", SP_CSS_FONT_VARIANT_NORMAL},
219 {"small-caps", SP_CSS_FONT_VARIANT_SMALL_CAPS},
220 {NULL, -1}
221 };
223 static SPStyleEnum const enum_font_weight[] = {
224 {"100", SP_CSS_FONT_WEIGHT_100},
225 {"200", SP_CSS_FONT_WEIGHT_200},
226 {"300", SP_CSS_FONT_WEIGHT_300},
227 {"400", SP_CSS_FONT_WEIGHT_400},
228 {"500", SP_CSS_FONT_WEIGHT_500},
229 {"600", SP_CSS_FONT_WEIGHT_600},
230 {"700", SP_CSS_FONT_WEIGHT_700},
231 {"800", SP_CSS_FONT_WEIGHT_800},
232 {"900", SP_CSS_FONT_WEIGHT_900},
233 {"normal", SP_CSS_FONT_WEIGHT_NORMAL},
234 {"bold", SP_CSS_FONT_WEIGHT_BOLD},
235 {"lighter", SP_CSS_FONT_WEIGHT_LIGHTER},
236 {"bolder", SP_CSS_FONT_WEIGHT_BOLDER},
237 {NULL, -1}
238 };
240 static SPStyleEnum const enum_font_stretch[] = {
241 {"ultra-condensed", SP_CSS_FONT_STRETCH_ULTRA_CONDENSED},
242 {"extra-condensed", SP_CSS_FONT_STRETCH_EXTRA_CONDENSED},
243 {"condensed", SP_CSS_FONT_STRETCH_CONDENSED},
244 {"semi-condensed", SP_CSS_FONT_STRETCH_SEMI_CONDENSED},
245 {"normal", SP_CSS_FONT_STRETCH_NORMAL},
246 {"semi-expanded", SP_CSS_FONT_STRETCH_SEMI_EXPANDED},
247 {"expanded", SP_CSS_FONT_STRETCH_EXPANDED},
248 {"extra-expanded", SP_CSS_FONT_STRETCH_EXTRA_EXPANDED},
249 {"ultra-expanded", SP_CSS_FONT_STRETCH_ULTRA_EXPANDED},
250 {"narrower", SP_CSS_FONT_STRETCH_NARROWER},
251 {"wider", SP_CSS_FONT_STRETCH_WIDER},
252 {NULL, -1}
253 };
255 static SPStyleEnum const enum_text_align[] = {
256 {"start", SP_CSS_TEXT_ALIGN_START},
257 {"end", SP_CSS_TEXT_ALIGN_END},
258 {"left", SP_CSS_TEXT_ALIGN_LEFT},
259 {"right", SP_CSS_TEXT_ALIGN_RIGHT},
260 {"center", SP_CSS_TEXT_ALIGN_CENTER},
261 {"justify", SP_CSS_TEXT_ALIGN_JUSTIFY},
262 {NULL, -1}
263 };
265 static SPStyleEnum const enum_text_transform[] = {
266 {"capitalize", SP_CSS_TEXT_TRANSFORM_CAPITALIZE},
267 {"uppercase", SP_CSS_TEXT_TRANSFORM_UPPERCASE},
268 {"lowercase", SP_CSS_TEXT_TRANSFORM_LOWERCASE},
269 {"none", SP_CSS_TEXT_TRANSFORM_NONE},
270 {NULL, -1}
271 };
273 static SPStyleEnum const enum_text_anchor[] = {
274 {"start", SP_CSS_TEXT_ANCHOR_START},
275 {"middle", SP_CSS_TEXT_ANCHOR_MIDDLE},
276 {"end", SP_CSS_TEXT_ANCHOR_END},
277 {NULL, -1}
278 };
280 static SPStyleEnum const enum_direction[] = {
281 {"ltr", SP_CSS_DIRECTION_LTR},
282 {"rtl", SP_CSS_DIRECTION_RTL},
283 {NULL, -1}
284 };
286 static SPStyleEnum const enum_block_progression[] = {
287 {"tb", SP_CSS_BLOCK_PROGRESSION_TB},
288 {"rl", SP_CSS_BLOCK_PROGRESSION_RL},
289 {"lr", SP_CSS_BLOCK_PROGRESSION_LR},
290 {NULL, -1}
291 };
293 static SPStyleEnum const enum_writing_mode[] = {
294 /* Note that using the same enumerator for lr as lr-tb means we write as lr-tb even if the
295 * input file said lr. We prefer writing lr-tb on the grounds that the spec says the initial
296 * value is lr-tb rather than lr.
297 *
298 * ECMA scripts may be surprised to find tb-rl in DOM if they set the attribute to rl, so
299 * sharing enumerators for different strings may be a bug (once we support ecma script).
300 */
301 {"lr-tb", SP_CSS_WRITING_MODE_LR_TB},
302 {"rl-tb", SP_CSS_WRITING_MODE_RL_TB},
303 {"tb-rl", SP_CSS_WRITING_MODE_TB_RL},
304 {"lr", SP_CSS_WRITING_MODE_LR_TB},
305 {"rl", SP_CSS_WRITING_MODE_RL_TB},
306 {"tb", SP_CSS_WRITING_MODE_TB_RL},
307 {NULL, -1}
308 };
310 static SPStyleEnum const enum_visibility[] = {
311 {"hidden", SP_CSS_VISIBILITY_HIDDEN},
312 {"collapse", SP_CSS_VISIBILITY_COLLAPSE},
313 {"visible", SP_CSS_VISIBILITY_VISIBLE},
314 {NULL, -1}
315 };
317 static SPStyleEnum const enum_overflow[] = {
318 {"visible", SP_CSS_OVERFLOW_VISIBLE},
319 {"hidden", SP_CSS_OVERFLOW_HIDDEN},
320 {"scroll", SP_CSS_OVERFLOW_SCROLL},
321 {"auto", SP_CSS_OVERFLOW_AUTO},
322 {NULL, -1}
323 };
325 static SPStyleEnum const enum_display[] = {
326 {"none", SP_CSS_DISPLAY_NONE},
327 {"inline", SP_CSS_DISPLAY_INLINE},
328 {"block", SP_CSS_DISPLAY_BLOCK},
329 {"list-item", SP_CSS_DISPLAY_LIST_ITEM},
330 {"run-in", SP_CSS_DISPLAY_RUN_IN},
331 {"compact", SP_CSS_DISPLAY_COMPACT},
332 {"marker", SP_CSS_DISPLAY_MARKER},
333 {"table", SP_CSS_DISPLAY_TABLE},
334 {"inline-table", SP_CSS_DISPLAY_INLINE_TABLE},
335 {"table-row-group", SP_CSS_DISPLAY_TABLE_ROW_GROUP},
336 {"table-header-group", SP_CSS_DISPLAY_TABLE_HEADER_GROUP},
337 {"table-footer-group", SP_CSS_DISPLAY_TABLE_FOOTER_GROUP},
338 {"table-row", SP_CSS_DISPLAY_TABLE_ROW},
339 {"table-column-group", SP_CSS_DISPLAY_TABLE_COLUMN_GROUP},
340 {"table-column", SP_CSS_DISPLAY_TABLE_COLUMN},
341 {"table-cell", SP_CSS_DISPLAY_TABLE_CELL},
342 {"table-caption", SP_CSS_DISPLAY_TABLE_CAPTION},
343 {NULL, -1}
344 };
346 static SPStyleEnum const enum_shape_rendering[] = {
347 {"auto", 0},
348 {"optimizeSpeed", 0},
349 {"crispEdges", 0},
350 {"geometricPrecision", 0},
351 {NULL, -1}
352 };
354 static SPStyleEnum const enum_color_rendering[] = {
355 {"auto", 0},
356 {"optimizeSpeed", 0},
357 {"optimizeQuality", 0},
358 {NULL, -1}
359 };
361 static SPStyleEnum const *const enum_image_rendering = enum_color_rendering;
363 static SPStyleEnum const enum_text_rendering[] = {
364 {"auto", 0},
365 {"optimizeSpeed", 0},
366 {"optimizeLegibility", 0},
367 {"geometricPrecision", 0},
368 {NULL, -1}
369 };
371 /**
372 * Release callback.
373 */
374 static void
375 sp_style_object_release(SPObject *object, SPStyle *style)
376 {
377 style->object = NULL;
378 }
383 /**
384 * Returns a new SPStyle object with settings as per sp_style_clear().
385 */
386 SPStyle *
387 sp_style_new()
388 {
389 SPStyle *const style = g_new0(SPStyle, 1);
391 style->refcount = 1;
392 style->object = NULL;
393 style->text = sp_text_style_new();
394 style->text_private = TRUE;
396 sp_style_clear(style);
398 style->cloned = false;
400 style->fill_hreffed = false;
401 style->stroke_hreffed = false;
403 style->fill_listening = false;
404 style->stroke_listening = false;
406 return style;
407 }
410 /**
411 * Creates a new SPStyle object, and attaches it to the specified SPObject.
412 */
413 SPStyle *
414 sp_style_new_from_object(SPObject *object)
415 {
416 g_return_val_if_fail(object != NULL, NULL);
417 g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
419 SPStyle *style = sp_style_new();
420 style->object = object;
421 g_signal_connect(G_OBJECT(object), "release", G_CALLBACK(sp_style_object_release), style);
423 if (object && SP_OBJECT_IS_CLONED(object)) {
424 style->cloned = true;
425 }
427 return style;
428 }
431 /**
432 * Increase refcount of style.
433 */
434 SPStyle *
435 sp_style_ref(SPStyle *style)
436 {
437 g_return_val_if_fail(style != NULL, NULL);
438 g_return_val_if_fail(style->refcount > 0, NULL);
440 style->refcount += 1;
442 return style;
443 }
446 /**
447 * Decrease refcount of style with possible destruction.
448 */
449 SPStyle *
450 sp_style_unref(SPStyle *style)
451 {
452 g_return_val_if_fail(style != NULL, NULL);
453 g_return_val_if_fail(style->refcount > 0, NULL);
455 style->refcount -= 1;
457 if (style->refcount < 1) {
458 if (style->object)
459 g_signal_handlers_disconnect_matched(G_OBJECT(style->object),
460 G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style);
461 if (style->text) sp_text_style_unref(style->text);
462 sp_style_paint_clear(style, &style->fill);
463 sp_style_paint_clear(style, &style->stroke);
464 g_free(style->stroke_dash.dash);
465 g_free(style);
466 }
468 return NULL;
469 }
471 /**
472 * Reads the various style parameters for an object from repr.
473 */
474 static void
475 sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
476 {
477 g_assert(style != NULL);
478 g_assert(repr != NULL);
479 g_assert(!object || (SP_OBJECT_REPR(object) == repr));
481 sp_style_clear(style);
483 if (object && SP_OBJECT_IS_CLONED(object)) {
484 style->cloned = true;
485 }
487 /* 1. Style itself */
488 gchar const *val = repr->attribute("style");
489 if (val != NULL) {
490 sp_style_merge_from_style_string(style, val);
491 }
493 if (object) {
494 sp_style_merge_from_object_stylesheet(style, object);
495 } else {
496 /** \todo No stylesheet information. Find out under what circumstances
497 * this occurs, and handle accordingly. (If we really wanted to, we
498 * could probably get stylesheets by going through repr->doc.)
499 */
500 }
502 /* 2. Presentation attributes */
503 /* CSS2 */
504 SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true);
505 SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true);
506 SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true);
507 /* Font */
508 SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size");
509 SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true);
510 SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true);
511 SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true);
512 SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true);
513 /* Text (css2 chapter 16) */
514 SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent");
515 SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true);
516 if (!style->text_decoration.set) {
517 val = repr->attribute("text-decoration");
518 if (val) {
519 sp_style_read_itextdecoration(&style->text_decoration, val);
520 }
521 }
522 if (!style->line_height.set) {
523 val = repr->attribute("line-height");
524 if (val) {
525 sp_style_read_ilengthornormal(&style->line_height, val);
526 }
527 }
528 if (!style->letter_spacing.set) {
529 val = repr->attribute("letter-spacing");
530 if (val) {
531 sp_style_read_ilengthornormal(&style->letter_spacing, val);
532 }
533 }
534 if (!style->word_spacing.set) {
535 val = repr->attribute("word-spacing");
536 if (val) {
537 sp_style_read_ilengthornormal(&style->word_spacing, val);
538 }
539 }
540 SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true);
541 SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true);
542 SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true);
544 /* SVG */
545 SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode",
546 enum_writing_mode, true);
547 SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor",
548 enum_text_anchor, true);
550 /* opacity */
551 if (!style->opacity.set) {
552 val = repr->attribute("opacity");
553 if (val) {
554 sp_style_read_iscale24(&style->opacity, val);
555 }
556 }
557 /* color */
558 if (!style->color.set) {
559 val = repr->attribute("color");
560 if (val) {
561 sp_style_read_icolor(&style->color, val, style, ( object
562 ? SP_OBJECT_DOCUMENT(object)
563 : NULL ));
564 }
565 }
566 /* fill */
567 if (!style->fill.set) {
568 val = repr->attribute("fill");
569 if (val) {
570 sp_style_read_ipaint(&style->fill, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
571 }
572 }
573 /* fill-opacity */
574 if (!style->fill_opacity.set) {
575 val = repr->attribute("fill-opacity");
576 if (val) {
577 sp_style_read_iscale24(&style->fill_opacity, val);
578 }
579 }
580 /* fill-rule */
581 SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true);
582 /* stroke */
583 if (!style->stroke.set) {
584 val = repr->attribute("stroke");
585 if (val) {
586 sp_style_read_ipaint(&style->stroke, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
587 }
588 }
589 SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width");
590 SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true);
591 SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true);
592 SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit");
594 /* markers */
595 if (!style->marker[SP_MARKER_LOC].set) {
596 val = repr->attribute("marker");
597 if (val) {
598 sp_style_read_istring(&style->marker[SP_MARKER_LOC], val);
599 }
600 }
601 if (!style->marker[SP_MARKER_LOC_START].set) {
602 val = repr->attribute("marker-start");
603 if (val) {
604 sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val);
605 }
606 }
607 if (!style->marker[SP_MARKER_LOC_MID].set) {
608 val = repr->attribute("marker-mid");
609 if (val) {
610 sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val);
611 }
612 }
613 if (!style->marker[SP_MARKER_LOC_END].set) {
614 val = repr->attribute("marker-end");
615 if (val) {
616 sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val);
617 }
618 }
620 /* stroke-opacity */
621 if (!style->stroke_opacity.set) {
622 val = repr->attribute("stroke-opacity");
623 if (val) {
624 sp_style_read_iscale24(&style->stroke_opacity, val);
625 }
626 }
627 if (!style->stroke_dasharray_set) {
628 val = repr->attribute("stroke-dasharray");
629 if (val) {
630 sp_style_read_dash(style, val);
631 }
632 }
633 if (!style->stroke_dashoffset_set) {
634 /* fixme */
635 val = repr->attribute("stroke-dashoffset");
636 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
637 style->stroke_dashoffset_set = TRUE;
638 } else {
639 style->stroke_dashoffset_set = FALSE;
640 }
641 }
643 /* font-family */
644 if (!style->text_private || !style->text->font_family.set) {
645 val = repr->attribute("font-family");
646 if (val) {
647 if (!style->text_private) sp_style_privatize_text(style);
648 sp_style_read_istring(&style->text->font_family, val);
649 css2_unescape_unquote(&style->text->font_family);
650 }
651 }
653 /* filter effects */
654 if (!style->filter.set) {
655 val = repr->attribute("filter");
656 if (val) {
657 sp_style_read_ifilter(&style->filter, val, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
658 }
659 }
661 /* 3. Merge from parent */
662 if (object) {
663 if (object->parent) {
664 sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent));
665 }
666 } else {
667 if (sp_repr_parent(repr)) {
668 /// \todo fixme: This is not the prettiest thing (Lauris)
669 SPStyle *parent = sp_style_new();
670 sp_style_read(parent, NULL, sp_repr_parent(repr));
671 sp_style_merge_from_parent(style, parent);
672 sp_style_unref(parent);
673 }
674 }
675 }
678 /**
679 * Read style properties from object's repr.
680 *
681 * 1. Reset existing object style
682 * 2. Load current effective object style
683 * 3. Load i attributes from immediate parent (which has to be up-to-date)
684 */
685 void
686 sp_style_read_from_object(SPStyle *style, SPObject *object)
687 {
688 g_return_if_fail(style != NULL);
689 g_return_if_fail(object != NULL);
690 g_return_if_fail(SP_IS_OBJECT(object));
692 Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
693 g_return_if_fail(repr != NULL);
695 sp_style_read(style, object, repr);
696 }
699 /**
700 * Read style properties from repr only.
701 */
702 void
703 sp_style_read_from_repr(SPStyle *style, Inkscape::XML::Node *repr)
704 {
705 g_return_if_fail(style != NULL);
706 g_return_if_fail(repr != NULL);
708 sp_style_read(style, NULL, repr);
709 }
713 /**
714 *
715 */
716 static void
717 sp_style_privatize_text(SPStyle *style)
718 {
719 SPTextStyle *text = style->text;
720 style->text = sp_text_style_duplicate_unset(style->text);
721 sp_text_style_unref(text);
722 style->text_private = TRUE;
723 }
726 /**
727 * Merge property into style.
728 *
729 * Should be called in order of highest to lowest precedence.
730 * E.g. for a single style string, call from the last declaration to the first,
731 * as CSS says that later declarations override earlier ones.
732 *
733 * \pre val != NULL.
734 */
735 static void
736 sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
737 {
738 g_return_if_fail(val != NULL);
740 switch (id) {
741 /* CSS2 */
742 /* Font */
743 case SP_PROP_FONT_FAMILY:
744 if (!style->text_private) sp_style_privatize_text(style);
745 if (!style->text->font_family.set) {
746 sp_style_read_istring(&style->text->font_family, val);
747 css2_unescape_unquote(&style->text->font_family);
748 }
749 break;
750 case SP_PROP_FONT_SIZE:
751 SPS_READ_IFONTSIZE_IF_UNSET(&style->font_size, val);
752 break;
753 case SP_PROP_FONT_SIZE_ADJUST:
754 if (strcmp(val, "none") != 0) {
755 g_warning("Unimplemented style property id SP_PROP_FONT_SIZE_ADJUST: value: %s", val);
756 }
757 break;
758 case SP_PROP_FONT_STYLE:
759 SPS_READ_IENUM_IF_UNSET(&style->font_style, val, enum_font_style, true);
760 break;
761 case SP_PROP_FONT_VARIANT:
762 SPS_READ_IENUM_IF_UNSET(&style->font_variant, val, enum_font_variant, true);
763 break;
764 case SP_PROP_FONT_WEIGHT:
765 SPS_READ_IENUM_IF_UNSET(&style->font_weight, val, enum_font_weight, true);
766 break;
767 case SP_PROP_FONT_STRETCH:
768 SPS_READ_IENUM_IF_UNSET(&style->font_stretch, val, enum_font_stretch, true);
769 break;
770 case SP_PROP_FONT:
771 if (!style->text_private) sp_style_privatize_text(style);
772 if (!style->text->font.set) {
773 g_free(style->text->font.value);
774 style->text->font.value = g_strdup(val);
775 style->text->font.set = TRUE;
776 style->text->font.inherit = (val && !strcmp(val, "inherit"));
777 }
778 break;
779 /* Text */
780 case SP_PROP_TEXT_INDENT:
781 SPS_READ_ILENGTH_IF_UNSET(&style->text_indent, val);
782 break;
783 case SP_PROP_TEXT_ALIGN:
784 SPS_READ_IENUM_IF_UNSET(&style->text_align, val, enum_text_align, true);
785 break;
786 case SP_PROP_TEXT_DECORATION:
787 if (!style->text_decoration.set) {
788 sp_style_read_itextdecoration(&style->text_decoration, val);
789 }
790 break;
791 case SP_PROP_LINE_HEIGHT:
792 if (!style->line_height.set) {
793 sp_style_read_ilengthornormal(&style->line_height, val);
794 }
795 break;
796 case SP_PROP_LETTER_SPACING:
797 if (!style->letter_spacing.set) {
798 sp_style_read_ilengthornormal(&style->letter_spacing, val);
799 }
800 break;
801 case SP_PROP_WORD_SPACING:
802 if (!style->word_spacing.set) {
803 sp_style_read_ilengthornormal(&style->word_spacing, val);
804 }
805 break;
806 case SP_PROP_TEXT_TRANSFORM:
807 SPS_READ_IENUM_IF_UNSET(&style->text_transform, val, enum_text_transform, true);
808 break;
809 /* Text (css3) */
810 case SP_PROP_DIRECTION:
811 SPS_READ_IENUM_IF_UNSET(&style->direction, val, enum_direction, true);
812 break;
813 case SP_PROP_BLOCK_PROGRESSION:
814 SPS_READ_IENUM_IF_UNSET(&style->block_progression, val, enum_block_progression, true);
815 break;
816 case SP_PROP_WRITING_MODE:
817 SPS_READ_IENUM_IF_UNSET(&style->writing_mode, val, enum_writing_mode, true);
818 break;
819 case SP_PROP_TEXT_ANCHOR:
820 SPS_READ_IENUM_IF_UNSET(&style->text_anchor, val, enum_text_anchor, true);
821 break;
822 /* Text (unimplemented) */
823 case SP_PROP_TEXT_RENDERING: {
824 /* Ignore the hint. */
825 SPIEnum dummy;
826 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_text_rendering, true);
827 break;
828 }
829 case SP_PROP_ALIGNMENT_BASELINE:
830 g_warning("Unimplemented style property SP_PROP_ALIGNMENT_BASELINE: value: %s", val);
831 break;
832 case SP_PROP_BASELINE_SHIFT:
833 g_warning("Unimplemented style property SP_PROP_BASELINE_SHIFT: value: %s", val);
834 break;
835 case SP_PROP_DOMINANT_BASELINE:
836 g_warning("Unimplemented style property SP_PROP_DOMINANT_BASELINE: value: %s", val);
837 break;
838 case SP_PROP_GLYPH_ORIENTATION_HORIZONTAL:
839 g_warning("Unimplemented style property SP_PROP_ORIENTATION_HORIZONTAL: value: %s", val);
840 break;
841 case SP_PROP_GLYPH_ORIENTATION_VERTICAL:
842 g_warning("Unimplemented style property SP_PROP_ORIENTATION_VERTICAL: value: %s", val);
843 break;
844 case SP_PROP_KERNING:
845 g_warning("Unimplemented style property SP_PROP_KERNING: value: %s", val);
846 break;
847 /* Misc */
848 case SP_PROP_CLIP:
849 g_warning("Unimplemented style property SP_PROP_CLIP: value: %s", val);
850 break;
851 case SP_PROP_COLOR:
852 if (!style->color.set) {
853 sp_style_read_icolor(&style->color, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
854 }
855 break;
856 case SP_PROP_CURSOR:
857 g_warning("Unimplemented style property SP_PROP_CURSOR: value: %s", val);
858 break;
859 case SP_PROP_DISPLAY:
860 SPS_READ_IENUM_IF_UNSET(&style->display, val, enum_display, true);
861 break;
862 case SP_PROP_OVERFLOW:
863 /** \todo
864 * FIXME: not supported properly yet, we just read and write it,
865 * but act as if it is always "display".
866 */
867 SPS_READ_IENUM_IF_UNSET(&style->overflow, val, enum_overflow, true);
868 break;
869 case SP_PROP_VISIBILITY:
870 SPS_READ_IENUM_IF_UNSET(&style->visibility, val, enum_visibility, true);
871 break;
872 /* SVG */
873 /* Clip/Mask */
874 case SP_PROP_CLIP_PATH:
875 g_warning("Unimplemented style property SP_PROP_CLIP_PATH: value: %s", val);
876 break;
877 case SP_PROP_CLIP_RULE:
878 g_warning("Unimplemented style property SP_PROP_CLIP_RULE: value: %s", val);
879 break;
880 case SP_PROP_MASK:
881 g_warning("Unimplemented style property SP_PROP_MASK: value: %s", val);
882 break;
883 case SP_PROP_OPACITY:
884 if (!style->opacity.set) {
885 sp_style_read_iscale24(&style->opacity, val);
886 }
887 break;
888 case SP_PROP_ENABLE_BACKGROUND:
889 g_warning("Unimplemented style property SP_PROP_ENABLE_BACKGROUND: value: %s", val);
890 break;
891 /* Filter */
892 case SP_PROP_FILTER:
893 if (style->filter.set && style->filter.inherit) {
894 sp_style_read_ifilter(&style->filter, val, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
895 }
896 break;
897 case SP_PROP_FLOOD_COLOR:
898 g_warning("Unimplemented style property SP_PROP_FLOOD_COLOR: value: %s", val);
899 break;
900 case SP_PROP_FLOOD_OPACITY:
901 g_warning("Unimplemented style property SP_PROP_FLOOD_OPACITY: value: %s", val);
902 break;
903 case SP_PROP_LIGHTING_COLOR:
904 g_warning("Unimplemented style property SP_PROP_LIGHTING_COLOR: value: %s", val);
905 break;
906 /* Gradient */
907 case SP_PROP_STOP_COLOR:
908 g_warning("Unimplemented style property SP_PROP_STOP_COLOR: value: %s", val);
909 break;
910 case SP_PROP_STOP_OPACITY:
911 g_warning("Unimplemented style property SP_PROP_STOP_OPACITY: value: %s", val);
912 break;
913 /* Interactivity */
914 case SP_PROP_POINTER_EVENTS:
915 g_warning("Unimplemented style property SP_PROP_POINTER_EVENTS: value: %s", val);
916 break;
917 /* Paint */
918 case SP_PROP_COLOR_INTERPOLATION:
919 g_warning("Unimplemented style property SP_PROP_COLOR_INTERPOLATION: value: %s", val);
920 break;
921 case SP_PROP_COLOR_INTERPOLATION_FILTERS:
922 g_warning("Unimplemented style property SP_PROP_INTERPOLATION_FILTERS: value: %s", val);
923 break;
924 case SP_PROP_COLOR_PROFILE:
925 g_warning("Unimplemented style property SP_PROP_COLOR_PROFILE: value: %s", val);
926 break;
927 case SP_PROP_COLOR_RENDERING: {
928 /* Ignore the hint. */
929 SPIEnum dummy;
930 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_color_rendering, true);
931 break;
932 }
933 case SP_PROP_FILL:
934 if (!style->fill.set) {
935 sp_style_read_ipaint(&style->fill, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
936 }
937 break;
938 case SP_PROP_FILL_OPACITY:
939 if (!style->fill_opacity.set) {
940 sp_style_read_iscale24(&style->fill_opacity, val);
941 }
942 break;
943 case SP_PROP_FILL_RULE:
944 if (!style->fill_rule.set) {
945 sp_style_read_ienum(&style->fill_rule, val, enum_fill_rule, true);
946 }
947 break;
948 case SP_PROP_IMAGE_RENDERING: {
949 /* Ignore the hint. */
950 SPIEnum dummy;
951 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_image_rendering, true);
952 break;
953 }
954 case SP_PROP_MARKER:
955 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
956 /* style->marker[SP_MARKER_LOC] = g_quark_from_string(val); */
957 marker_status("Setting SP_PROP_MARKER");
958 if (!style->marker[SP_MARKER_LOC].set) {
959 g_free(style->marker[SP_MARKER_LOC].value);
960 style->marker[SP_MARKER_LOC].value = g_strdup(val);
961 style->marker[SP_MARKER_LOC].set = TRUE;
962 style->marker[SP_MARKER_LOC].inherit = (val && !strcmp(val, "inherit"));
963 }
964 break;
966 case SP_PROP_MARKER_START:
967 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
968 marker_status("Setting SP_PROP_MARKER_START");
969 if (!style->marker[SP_MARKER_LOC_START].set) {
970 g_free(style->marker[SP_MARKER_LOC_START].value);
971 style->marker[SP_MARKER_LOC_START].value = g_strdup(val);
972 style->marker[SP_MARKER_LOC_START].set = TRUE;
973 style->marker[SP_MARKER_LOC_START].inherit = (val && !strcmp(val, "inherit"));
974 }
975 break;
976 case SP_PROP_MARKER_MID:
977 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
978 marker_status("Setting SP_PROP_MARKER_MID");
979 if (!style->marker[SP_MARKER_LOC_MID].set) {
980 g_free(style->marker[SP_MARKER_LOC_MID].value);
981 style->marker[SP_MARKER_LOC_MID].value = g_strdup(val);
982 style->marker[SP_MARKER_LOC_MID].set = TRUE;
983 style->marker[SP_MARKER_LOC_MID].inherit = (val && !strcmp(val, "inherit"));
984 }
985 break;
986 case SP_PROP_MARKER_END:
987 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
988 marker_status("Setting SP_PROP_MARKER_END");
989 if (!style->marker[SP_MARKER_LOC_END].set) {
990 g_free(style->marker[SP_MARKER_LOC_END].value);
991 style->marker[SP_MARKER_LOC_END].value = g_strdup(val);
992 style->marker[SP_MARKER_LOC_END].set = TRUE;
993 style->marker[SP_MARKER_LOC_END].inherit = (val && !strcmp(val, "inherit"));
994 }
995 break;
997 case SP_PROP_SHAPE_RENDERING: {
998 /* Ignore the hint. */
999 SPIEnum dummy;
1000 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_shape_rendering, true);
1001 break;
1002 }
1004 case SP_PROP_STROKE:
1005 if (!style->stroke.set) {
1006 sp_style_read_ipaint(&style->stroke, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
1007 }
1008 break;
1009 case SP_PROP_STROKE_WIDTH:
1010 SPS_READ_ILENGTH_IF_UNSET(&style->stroke_width, val);
1011 break;
1012 case SP_PROP_STROKE_DASHARRAY:
1013 if (!style->stroke_dasharray_set) {
1014 sp_style_read_dash(style, val);
1015 }
1016 break;
1017 case SP_PROP_STROKE_DASHOFFSET:
1018 if (!style->stroke_dashoffset_set) {
1019 /* fixme */
1020 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
1021 style->stroke_dashoffset_set = TRUE;
1022 } else {
1023 style->stroke_dashoffset_set = FALSE;
1024 }
1025 }
1026 break;
1027 case SP_PROP_STROKE_LINECAP:
1028 if (!style->stroke_linecap.set) {
1029 sp_style_read_ienum(&style->stroke_linecap, val, enum_stroke_linecap, true);
1030 }
1031 break;
1032 case SP_PROP_STROKE_LINEJOIN:
1033 if (!style->stroke_linejoin.set) {
1034 sp_style_read_ienum(&style->stroke_linejoin, val, enum_stroke_linejoin, true);
1035 }
1036 break;
1037 case SP_PROP_STROKE_MITERLIMIT:
1038 if (!style->stroke_miterlimit.set) {
1039 sp_style_read_ifloat(&style->stroke_miterlimit, val);
1040 }
1041 break;
1042 case SP_PROP_STROKE_OPACITY:
1043 if (!style->stroke_opacity.set) {
1044 sp_style_read_iscale24(&style->stroke_opacity, val);
1045 }
1046 break;
1048 default:
1049 g_warning("Invalid style property id: %d value: %s", id, val);
1050 break;
1051 }
1052 }
1054 static void
1055 sp_style_merge_style_from_decl(SPStyle *const style, CRDeclaration const *const decl)
1056 {
1057 /** \todo Ensure that property is lcased, as per
1058 * http://www.w3.org/TR/REC-CSS2/syndata.html#q4.
1059 * Should probably be done in libcroco.
1060 */
1061 unsigned const prop_idx = sp_attribute_lookup(decl->property->stryng->str);
1062 if (prop_idx != SP_ATTR_INVALID) {
1063 /** \todo
1064 * effic: Test whether the property is already set before trying to
1065 * convert to string. Alternatively, set from CRTerm directly rather
1066 * than converting to string.
1067 */
1068 guchar *const str_value_unsigned = cr_term_to_string(decl->value);
1069 gchar *const str_value = reinterpret_cast<gchar *>(str_value_unsigned);
1070 sp_style_merge_property(style, prop_idx, str_value);
1071 g_free(str_value);
1072 }
1073 }
1075 static void
1076 sp_style_merge_from_props(SPStyle *const style, CRPropList *const props)
1077 {
1078 #if 0 /* forwards */
1079 for (CRPropList const *cur = props; cur; cur = cr_prop_list_get_next(cur)) {
1080 CRDeclaration *decl = NULL;
1081 cr_prop_list_get_decl(cur, &decl);
1082 sp_style_merge_style_from_decl(style, decl);
1083 }
1084 #else /* in reverse order, as we need later declarations to take precedence over earlier ones. */
1085 if (props) {
1086 sp_style_merge_from_props(style, cr_prop_list_get_next(props));
1087 CRDeclaration *decl = NULL;
1088 cr_prop_list_get_decl(props, &decl);
1089 sp_style_merge_style_from_decl(style, decl);
1090 }
1091 #endif
1092 }
1094 /**
1095 * \pre decl_list != NULL
1096 */
1097 static void
1098 sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list)
1099 {
1100 if (decl_list->next) {
1101 sp_style_merge_from_decl_list(style, decl_list->next);
1102 }
1103 sp_style_merge_style_from_decl(style, decl_list);
1104 }
1106 static CRSelEng *
1107 sp_repr_sel_eng()
1108 {
1109 CRSelEng *const ret = cr_sel_eng_new();
1110 cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface);
1112 /** \todo
1113 * Check whether we need to register any pseudo-class handlers.
1114 * libcroco has its own default handlers for first-child and lang.
1115 *
1116 * We probably want handlers for link and arguably visited (though
1117 * inkscape can't visit links at the time of writing). hover etc.
1118 * more useful in inkview than the editor inkscape.
1119 *
1120 * http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that
1121 * the following should be honoured, at least by inkview:
1122 * :hover, :active, :focus, :visited, :link.
1123 */
1125 g_assert(ret);
1126 return ret;
1127 }
1129 static void
1130 sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object)
1131 {
1132 static CRSelEng *sel_eng = NULL;
1133 if (!sel_eng) {
1134 sel_eng = sp_repr_sel_eng();
1135 }
1137 CRPropList *props = NULL;
1138 CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng,
1139 object->document->style_cascade,
1140 object->repr,
1141 &props);
1142 g_return_if_fail(status == CR_OK);
1143 /// \todo Check what errors can occur, and handle them properly.
1144 if (props) {
1145 sp_style_merge_from_props(style, props);
1146 cr_prop_list_destroy(props);
1147 }
1148 }
1150 /**
1151 * Parses a style="..." string and merges it with an existing SPStyle.
1152 */
1153 void
1154 sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p)
1155 {
1156 /*
1157 * Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute:
1158 * ``When CSS styling is used, CSS inline style is specified by including
1159 * semicolon-separated property declarations of the form "name : value"
1160 * within the style attribute''.
1161 *
1162 * That's fairly ambiguous. Is a `value' allowed to contain semicolons?
1163 * Why does it say "including", what else is allowed in the style
1164 * attribute value?
1165 */
1167 CRDeclaration *const decl_list
1168 = cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8);
1169 if (decl_list) {
1170 sp_style_merge_from_decl_list(style, decl_list);
1171 cr_declaration_destroy(decl_list);
1172 }
1173 }
1175 /** Indexed by SP_CSS_FONT_SIZE_blah. */
1176 static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0};
1178 static void
1179 sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent)
1180 {
1181 /* 'font-size' */
1182 if (!child.set || child.inherit) {
1183 /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
1184 child.computed = parent.computed;
1185 } else if (child.type == SP_FONT_SIZE_LITERAL) {
1186 /** \todo
1187 * fixme: SVG and CSS do not specify clearly, whether we should use
1188 * user or screen coordinates (Lauris)
1189 */
1190 if (child.value < SP_CSS_FONT_SIZE_SMALLER) {
1191 child.computed = font_size_table[child.value];
1192 } else if (child.value == SP_CSS_FONT_SIZE_SMALLER) {
1193 child.computed = parent.computed / 1.2;
1194 } else if (child.value == SP_CSS_FONT_SIZE_LARGER) {
1195 child.computed = parent.computed * 1.2;
1196 } else {
1197 /* Illegal value */
1198 }
1199 } else if (child.type == SP_FONT_SIZE_PERCENTAGE) {
1200 /* Unlike most other lengths, percentage for font size is relative to parent computed value
1201 * rather than viewport. */
1202 child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value);
1203 }
1204 }
1206 /**
1207 * Sets computed values in \a style, which may involve inheriting from (or in some other way
1208 * calculating from) corresponding computed values of \a parent.
1209 *
1210 * References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default.
1211 * http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to
1212 * inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise
1213 * about what the computed value is (not obvious for lengths).
1214 *
1215 * \pre \a parent's computed values are already up-to-date.
1216 */
1217 void
1218 sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent)
1219 {
1220 g_return_if_fail(style != NULL);
1222 /** \todo
1223 * fixme: Check for existing callers that might pass null parent.
1224 * This should probably be g_return_if_fail, or else we should make a
1225 * best attempt to set computed values correctly without having a parent
1226 * (i.e., by assuming parent has initial values).
1227 */
1228 if (!parent)
1229 return;
1231 /* CSS2 */
1232 /* Font */
1233 sp_style_merge_font_size_from_parent(style->font_size, parent->font_size);
1235 /* 'font-style' */
1236 if (!style->font_style.set || style->font_style.inherit) {
1237 style->font_style.computed = parent->font_style.computed;
1238 }
1240 /* 'font-variant' */
1241 if (!style->font_variant.set || style->font_variant.inherit) {
1242 style->font_variant.computed = parent->font_variant.computed;
1243 }
1245 /* 'font-weight' */
1246 if (!style->font_weight.set || style->font_weight.inherit) {
1247 style->font_weight.computed = parent->font_weight.computed;
1248 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) {
1249 /** \todo
1250 * fixme: This is unconditional, i.e., happens even if parent not
1251 * present.
1252 */
1253 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
1254 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) {
1255 style->font_weight.computed = SP_CSS_FONT_WEIGHT_700;
1256 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) {
1257 unsigned const parent_val = parent->font_weight.computed;
1258 g_assert(SP_CSS_FONT_WEIGHT_100 == 0);
1259 // strictly, 'bolder' and 'lighter' should go to the next weight
1260 // expressible in the current font family, but that's difficult to
1261 // find out, so jumping by 3 seems an appropriate approximation
1262 style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3
1263 ? (unsigned)SP_CSS_FONT_WEIGHT_100
1264 : parent_val - 3);
1265 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1266 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) {
1267 unsigned const parent_val = parent->font_weight.computed;
1268 g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900);
1269 style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3
1270 ? (unsigned)SP_CSS_FONT_WEIGHT_900
1271 : parent_val + 3);
1272 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1273 }
1275 /* 'font-stretch' */
1276 if (!style->font_stretch.set || style->font_stretch.inherit) {
1277 style->font_stretch.computed = parent->font_stretch.computed;
1278 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) {
1279 unsigned const parent_val = parent->font_stretch.computed;
1280 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED
1281 ? parent_val
1282 : parent_val - 1);
1283 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1284 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) {
1285 unsigned const parent_val = parent->font_stretch.computed;
1286 g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1287 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED
1288 ? parent_val
1289 : parent_val + 1);
1290 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1291 }
1293 /* text (css2) */
1294 if (!style->text_indent.set || style->text_indent.inherit) {
1295 style->text_indent.computed = parent->text_indent.computed;
1296 }
1298 if (!style->text_align.set || style->text_align.inherit) {
1299 style->text_align.computed = parent->text_align.computed;
1300 }
1302 if (!style->text_decoration.set || style->text_decoration.inherit) {
1303 style->text_decoration.underline = parent->text_decoration.underline;
1304 style->text_decoration.overline = parent->text_decoration.overline;
1305 style->text_decoration.line_through = parent->text_decoration.line_through;
1306 style->text_decoration.blink = parent->text_decoration.blink;
1307 }
1309 if (!style->line_height.set || style->line_height.inherit) {
1310 style->line_height.computed = parent->line_height.computed;
1311 style->line_height.normal = parent->line_height.normal;
1312 }
1314 if (!style->letter_spacing.set || style->letter_spacing.inherit) {
1315 style->letter_spacing.computed = parent->letter_spacing.computed;
1316 style->letter_spacing.normal = parent->letter_spacing.normal;
1317 }
1319 if (!style->word_spacing.set || style->word_spacing.inherit) {
1320 style->word_spacing.computed = parent->word_spacing.computed;
1321 style->word_spacing.normal = parent->word_spacing.normal;
1322 }
1324 if (!style->text_transform.set || style->text_transform.inherit) {
1325 style->text_transform.computed = parent->text_transform.computed;
1326 }
1328 if (!style->direction.set || style->direction.inherit) {
1329 style->direction.computed = parent->direction.computed;
1330 }
1332 if (!style->block_progression.set || style->block_progression.inherit) {
1333 style->block_progression.computed = parent->block_progression.computed;
1334 }
1336 if (!style->writing_mode.set || style->writing_mode.inherit) {
1337 style->writing_mode.computed = parent->writing_mode.computed;
1338 }
1340 if (!style->text_anchor.set || style->text_anchor.inherit) {
1341 style->text_anchor.computed = parent->text_anchor.computed;
1342 }
1344 if (style->opacity.inherit) {
1345 style->opacity.value = parent->opacity.value;
1346 }
1348 /* Color */
1349 if (!style->color.set || style->color.inherit) {
1350 sp_style_merge_ipaint(style, &style->color, &parent->color);
1351 }
1353 /* Fill */
1354 if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) {
1355 sp_style_merge_ipaint(style, &style->fill, &parent->fill);
1356 }
1358 if (!style->fill_opacity.set || style->fill_opacity.inherit) {
1359 style->fill_opacity.value = parent->fill_opacity.value;
1360 }
1362 if (!style->fill_rule.set || style->fill_rule.inherit) {
1363 style->fill_rule.computed = parent->fill_rule.computed;
1364 }
1366 /* Stroke */
1367 if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) {
1368 sp_style_merge_ipaint(style, &style->stroke, &parent->stroke);
1369 }
1371 if (!style->stroke_width.set || style->stroke_width.inherit) {
1372 style->stroke_width.computed = parent->stroke_width.computed;
1373 } else {
1374 /* Update computed value for any change in font inherited from parent. */
1375 double const em = style->font_size.computed;
1376 if (style->stroke_width.unit == SP_CSS_UNIT_EM) {
1377 style->stroke_width.computed = style->stroke_width.value * em;
1378 } else if (style->stroke_width.unit == SP_CSS_UNIT_EX) {
1379 double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango.
1380 style->stroke_width.computed = style->stroke_width.value * ex;
1381 }
1382 }
1384 if (!style->stroke_linecap.set || style->stroke_linecap.inherit) {
1385 style->stroke_linecap.computed = parent->stroke_linecap.computed;
1386 }
1388 if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) {
1389 style->stroke_linejoin.computed = parent->stroke_linejoin.computed;
1390 }
1392 if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) {
1393 style->stroke_miterlimit.value = parent->stroke_miterlimit.value;
1394 }
1396 if (!style->stroke_dasharray_set && parent->stroke_dasharray_set) {
1397 /** \todo
1398 * This code looks wrong. Why does the logic differ from the
1399 * above properties? Similarly dashoffset below.
1400 */
1401 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1402 if (style->stroke_dash.n_dash > 0) {
1403 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1404 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1405 }
1406 }
1408 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1409 style->stroke_dash.offset = parent->stroke_dash.offset;
1410 }
1412 if (!style->stroke_opacity.set || style->stroke_opacity.inherit) {
1413 style->stroke_opacity.value = parent->stroke_opacity.value;
1414 }
1416 if (style->text && parent->text) {
1417 if (!style->text->font_family.set || style->text->font_family.inherit) {
1418 g_free(style->text->font_family.value);
1419 style->text->font_family.value = g_strdup(parent->text->font_family.value);
1420 }
1421 }
1423 /* Markers - Free the old value and make copy of the new */
1424 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1425 if (!style->marker[i].set || style->marker[i].inherit) {
1426 g_free(style->marker[i].value);
1427 style->marker[i].value = g_strdup(parent->marker[i].value);
1428 }
1429 }
1431 /* Filter effects */
1432 if(style->filter.set && style->filter.inherit) {
1433 sp_style_merge_ifilter(&style->filter, &parent->filter);
1434 }
1435 }
1437 template <typename T>
1438 static void
1439 sp_style_merge_prop_from_dying_parent(T &child, T const &parent)
1440 {
1441 if ( ( !(child.set) || child.inherit )
1442 && parent.set && !(parent.inherit) )
1443 {
1444 child = parent;
1445 }
1446 }
1448 /**
1449 * Copy SPIString from parent to child.
1450 */
1451 static void
1452 sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent)
1453 {
1454 if ( ( !(child.set) || child.inherit )
1455 && parent.set && !(parent.inherit) )
1456 {
1457 g_free(child.value);
1458 child.value = g_strdup(parent.value);
1459 child.set = parent.set;
1460 child.inherit = parent.inherit;
1461 }
1462 }
1464 static void
1465 sp_style_merge_paint_prop_from_dying_parent(SPStyle *style,
1466 SPIPaint &child, SPIPaint const &parent)
1467 {
1468 /** \todo
1469 * I haven't given this much attention. See comments below about
1470 * currentColor, colorProfile, and relative URIs.
1471 */
1472 if (!child.set || child.inherit || child.currentcolor) {
1473 sp_style_merge_ipaint(style, &child, &parent);
1474 child.set = parent.set;
1475 child.inherit = parent.inherit;
1476 }
1477 }
1479 static void
1480 sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent,
1481 unsigned const max_computed_val,
1482 unsigned const smaller_val)
1483 {
1484 /* We assume that min computed val is 0, contiguous up to max_computed_val,
1485 then zero or more other absolute values, then smaller_val then larger_val. */
1486 unsigned const min_computed_val = 0;
1487 unsigned const larger_val = smaller_val + 1;
1488 g_return_if_fail(min_computed_val < max_computed_val);
1489 g_return_if_fail(max_computed_val < smaller_val);
1491 if (parent.set && !parent.inherit) {
1492 if (!child.set || child.inherit) {
1493 child.value = parent.value;
1494 child.set = parent.set; // i.e. true
1495 child.inherit = parent.inherit; // i.e. false
1496 } else if (child.value < smaller_val) {
1497 /* Child has absolute value: leave as is. */
1498 } else if ( ( child.value == smaller_val
1499 && parent.value == larger_val )
1500 || ( parent.value == smaller_val
1501 && child.value == larger_val ) )
1502 {
1503 child.set = false;
1504 /*
1505 * Note that this can result in a change in computed value in the
1506 * rare case that the parent's setting was a no-op (i.e. if the
1507 * parent's parent's computed value was already ultra-condensed or
1508 * ultra-expanded). However, I'd guess that the change is for the
1509 * better: I'd guess that if the properties were specified
1510 * relatively, then the intent is to counteract parent's effect.
1511 * I.e. I believe this is the best code even in that case.
1512 */
1513 } else if (child.value == parent.value) {
1514 /* Leave as is. */
1515 /** \todo
1516 * It's unclear what to do if style and parent specify the same
1517 * relative directive (narrower or wider). We can either convert
1518 * to absolute specification or coalesce to a single relative
1519 * request (of half the strength of the original pair).
1520 *
1521 * Converting to a single level of relative specification is a
1522 * better choice if the newly-unlinked clone is itself cloned to
1523 * other contexts (inheriting different font stretchiness): it
1524 * would preserve the effect that it will be narrower than
1525 * the inherited context in each case. The disadvantage is that
1526 * it will ~certainly affect the computed value of the
1527 * newly-unlinked clone.
1528 */
1529 } else {
1530 unsigned const parent_val = parent.computed;
1531 child.value = ( child.value == smaller_val
1532 ? ( parent_val == min_computed_val
1533 ? parent_val
1534 : parent_val - 1 )
1535 : ( parent_val == max_computed_val
1536 ? parent_val
1537 : parent_val + 1 ) );
1538 g_assert(child.value <= max_computed_val);
1539 child.inherit = false;
1540 g_assert(child.set);
1541 }
1542 }
1543 }
1545 template <typename LengthT>
1546 static void
1547 sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent,
1548 double const parent_child_em_ratio)
1549 {
1550 if ( ( !(child.set) || child.inherit )
1551 && parent.set && !(parent.inherit) )
1552 {
1553 child = parent;
1554 switch (parent.unit) {
1555 case SP_CSS_UNIT_EM:
1556 case SP_CSS_UNIT_EX:
1557 child.value *= parent_child_em_ratio;
1558 /** \todo
1559 * fixme: Have separate ex ratio parameter.
1560 * Get x height from libnrtype or pango.
1561 */
1562 if (!isFinite(child.value)) {
1563 child.value = child.computed;
1564 child.unit = SP_CSS_UNIT_NONE;
1565 }
1566 break;
1568 default:
1569 break;
1570 }
1571 }
1572 }
1574 static double
1575 get_relative_font_size_frac(SPIFontSize const &font_size)
1576 {
1577 switch (font_size.type) {
1578 case SP_FONT_SIZE_LITERAL: {
1579 switch (font_size.value) {
1580 case SP_CSS_FONT_SIZE_SMALLER:
1581 return 5.0 / 6.0;
1583 case SP_CSS_FONT_SIZE_LARGER:
1584 return 6.0 / 5.0;
1586 default:
1587 g_assert_not_reached();
1588 }
1589 }
1591 case SP_FONT_SIZE_PERCENTAGE:
1592 return SP_F8_16_TO_FLOAT(font_size.value);
1594 case SP_FONT_SIZE_LENGTH:
1595 g_assert_not_reached();
1596 }
1597 g_assert_not_reached();
1598 }
1600 /**
1601 * Combine \a style and \a parent style specifications into a single style specification that
1602 * preserves (as much as possible) the effect of the existing \a style being a child of \a parent.
1603 *
1604 * Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being
1605 * unlinked), in which case we copy/adapt property values that are explicitly set in \a parent,
1606 * trying to retain the same visual appearance once the parent is removed. Interesting cases are
1607 * when there is unusual interaction with the parent's value (opacity, display) or when the value
1608 * can be specified as relative to the parent computed value (font-size, font-weight etc.).
1609 *
1610 * Doesn't update computed values of \a style. For correctness, you should subsequently call
1611 * sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a
1612 * style was previously up-to-date wrt \a parent.
1613 *
1614 * \pre \a parent's computed values are already up-to-date.
1615 * (\a style's computed values needn't be up-to-date.)
1616 */
1617 void
1618 sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent)
1619 {
1620 /** \note
1621 * The general rule for each property is as follows:
1622 *
1623 * If style is set to an absolute value, then leave it as is.
1624 *
1625 * Otherwise (i.e. if style has a relative value):
1626 *
1627 * If parent is set to an absolute value, then set style to the computed value.
1628 *
1629 * Otherwise, calculate the combined relative value (e.g. multiplying the two percentages).
1630 */
1632 /* We do font-size first, to ensure that em size is up-to-date. */
1633 /** \todo
1634 * fixme: We'll need to have more font-related things up the top once
1635 * we're getting x-height from pango or libnrtype.
1636 */
1638 /* Some things that allow relative specifications. */
1639 {
1640 /* font-size. Note that we update the computed font-size of style,
1641 to assist in em calculations later in this function. */
1642 if (parent->font_size.set && !parent->font_size.inherit) {
1643 if (!style->font_size.set || style->font_size.inherit) {
1644 /* font_size inherits the computed value, so we can use the parent value
1645 * verbatim. */
1646 style->font_size = parent->font_size;
1647 } else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) {
1648 /* Child already has absolute size (stored in computed value), so do nothing. */
1649 } else if ( style->font_size.type == SP_FONT_SIZE_LITERAL
1650 && style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) {
1651 /* Child already has absolute size, but we ensure that the computed value
1652 is up-to-date. */
1653 unsigned const ix = style->font_size.value;
1654 g_assert(ix < G_N_ELEMENTS(font_size_table));
1655 style->font_size.computed = font_size_table[ix];
1656 } else {
1657 /* Child has relative size. */
1658 double const child_frac(get_relative_font_size_frac(style->font_size));
1659 style->font_size.set = true;
1660 style->font_size.inherit = false;
1661 style->font_size.computed = parent->font_size.computed * child_frac;
1663 if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL
1664 && parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER )
1665 || parent->font_size.type == SP_FONT_SIZE_LENGTH )
1666 {
1667 /* Absolute value. */
1668 style->font_size.type = SP_FONT_SIZE_LENGTH;
1669 /* .value is unused for SP_FONT_SIZE_LENGTH. */
1670 } else {
1671 /* Relative value. */
1672 double const parent_frac(get_relative_font_size_frac(parent->font_size));
1673 style->font_size.type = SP_FONT_SIZE_PERCENTAGE;
1674 style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac);
1675 }
1676 }
1677 }
1679 /* 'font-stretch' */
1680 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch,
1681 parent->font_stretch,
1682 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
1683 SP_CSS_FONT_STRETCH_NARROWER);
1685 /* font-weight */
1686 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight,
1687 parent->font_weight,
1688 SP_CSS_FONT_WEIGHT_900,
1689 SP_CSS_FONT_WEIGHT_LIGHTER);
1690 }
1693 /* Enum values that don't have any relative settings (other than `inherit'). */
1694 {
1695 SPIEnum SPStyle::*const fields[] = {
1696 //nyi: SPStyle::clip_rule,
1697 //nyi: SPStyle::color_interpolation,
1698 //nyi: SPStyle::color_interpolation_filters,
1699 //nyi: SPStyle::color_rendering,
1700 &SPStyle::direction,
1701 &SPStyle::fill_rule,
1702 &SPStyle::font_style,
1703 &SPStyle::font_variant,
1704 //nyi: SPStyle::image_rendering,
1705 //nyi: SPStyle::pointer_events,
1706 //nyi: SPStyle::shape_rendering,
1707 &SPStyle::stroke_linecap,
1708 &SPStyle::stroke_linejoin,
1709 &SPStyle::text_anchor,
1710 //nyi: &SPStyle::text_rendering,
1711 &SPStyle::visibility,
1712 &SPStyle::writing_mode
1713 };
1715 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1716 SPIEnum SPStyle::*const fld = fields[i];
1717 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld);
1718 }
1719 }
1721 /* A few other simple inheritance properties. */
1722 {
1723 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity);
1724 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity);
1725 sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit);
1727 /** \todo
1728 * We currently treat text-decoration as if it were a simple inherited
1729 * property (fixme). This code may need changing once we do the
1730 * special fill/stroke inheritance mentioned by the spec.
1731 */
1732 sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration,
1733 parent->text_decoration);
1735 //nyi: font-size-adjust, // <number> | none | inherit
1736 //nyi: glyph-orientation-horizontal,
1737 //nyi: glyph-orientation-vertical,
1738 }
1740 /* Properties that involve length but are easy in other respects. */
1741 {
1742 /* The difficulty with lengths is that font-relative units need adjusting if the font
1743 * varies between parent & child.
1744 *
1745 * Lengths specified in the existing child can stay as they are: its computed font
1746 * specification should stay unchanged, so em & ex lengths should continue to mean the same
1747 * size.
1748 *
1749 * Lengths specified in the dying parent in em or ex need to be scaled according to the
1750 * ratio of em or ex size between parent & child.
1751 */
1752 double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed;
1754 SPILength SPStyle::*const lfields[] = {
1755 &SPStyle::stroke_width,
1756 &SPStyle::text_indent
1757 };
1758 for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) {
1759 SPILength SPStyle::*fld = lfields[i];
1760 sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld,
1761 parent->*fld,
1762 parent_child_em_ratio);
1763 }
1765 SPILengthOrNormal SPStyle::*const nfields[] = {
1766 &SPStyle::letter_spacing,
1767 &SPStyle::line_height,
1768 &SPStyle::word_spacing
1769 };
1770 for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) {
1771 SPILengthOrNormal SPStyle::*fld = nfields[i];
1772 sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld,
1773 parent->*fld,
1774 parent_child_em_ratio);
1775 }
1777 //nyi: &SPStyle::kerning: length or `auto'
1779 /* fixme: Move stroke-dash and stroke-dash-offset here once they
1780 can accept units. */
1781 }
1783 /* Properties that involve a URI but are easy in other respects. */
1784 {
1785 /** \todo
1786 * Could cause problems if original object was in another document
1787 * and it used a relative URL. (At the time of writing, we don't
1788 * allow hrefs to other documents, so this isn't a problem yet.)
1789 * Paint properties also allow URIs.
1790 */
1791 //nyi: cursor, // may involve change in effect, but we can't do much better
1792 //nyi: color-profile,
1794 // Markers (marker-start, marker-mid, marker-end).
1795 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1796 sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]);
1797 }
1798 }
1800 /* CSS2 */
1801 /* Font */
1803 if (style->text && parent->text) {
1804 sp_style_merge_string_prop_from_dying_parent(style->text->font_family,
1805 parent->text->font_family);
1806 }
1808 /* Properties that don't inherit by default. Most of these need special handling. */
1809 {
1810 /*
1811 * opacity's effect is cumulative; we set the new value to the combined effect. The
1812 * default value for opacity is 1.0, not inherit. (Note that stroke-opacity and
1813 * fill-opacity are quite different from opacity, and don't need any special handling.)
1814 *
1815 * Cases:
1816 * - parent & child were each previously unset, in which case the effective
1817 * opacity value is 1.0, and style should remain unset.
1818 * - parent was previously unset (so computed opacity value of 1.0)
1819 * and child was set to inherit. The merged child should
1820 * get a value of 1.0, and shouldn't inherit (lest the new parent
1821 * has a different opacity value). Given that opacity's default
1822 * value is 1.0 (rather than inherit), we might as well have the
1823 * merged child's opacity be unset.
1824 * - parent was previously unset (so opacity 1.0), and child was set to a number.
1825 * The merged child should retain its existing settings (though it doesn't matter
1826 * if we make it unset if that number was 1.0).
1827 * - parent was inherit and child was unset. Merged child should be set to inherit.
1828 * - parent was inherit and child was inherit. (We can't in general reproduce this
1829 * effect (short of introducing a new group), but setting opacity to inherit is rare.)
1830 * If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged
1831 * child's value should be set to the product of the two, i.e. the square of the
1832 * inherited value, and should not be marked as inherit. (This decision assumes that it
1833 * is more important to retain the effective opacity than to retain the inheriting
1834 * effect, and assumes that the inheriting effect either isn't important enough to create
1835 * a group or isn't common enough to bother maintaining the code to create a group.) If
1836 * the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes
1837 * closer to maintaining the effect.
1838 * - parent was inherit and child was set to a numerical value. If the child's value
1839 * was 1.0, then the merged child should have the same settings as the parent.
1840 * If the child's value was 0, then the merged child should also be set to 0.
1841 * If the child's value was anything else, then we do the same as for the inherit/inherit
1842 * case above: have the merged child set to the product of the two opacities and not
1843 * marked as inherit, for the same reasons as for that case.
1844 * - parent was set to a value, and child was unset. The merged child should have
1845 * parent's settings.
1846 * - parent was set to a value, and child was inherit. The merged child should
1847 * be set to the product, i.e. the square of the parent's value.
1848 * - parent & child are each set to a value. The merged child should be set to the
1849 * product.
1850 */
1851 if ( !style->opacity.set
1852 || ( !style->opacity.inherit
1853 && style->opacity.value == SP_SCALE24_MAX ) )
1854 {
1855 style->opacity = parent->opacity;
1856 } else {
1857 /* Ensure that style's computed value is up-to-date. */
1858 if (style->opacity.inherit) {
1859 style->opacity.value = parent->opacity.value;
1860 }
1862 /* Multiplication of opacities occurs even if a child's opacity is set to inherit. */
1863 style->opacity.value = SP_SCALE24_MUL(style->opacity.value,
1864 parent->opacity.value);
1866 style->opacity.inherit = (parent->opacity.inherit
1867 && style->opacity.inherit
1868 && (parent->opacity.value == 0 ||
1869 parent->opacity.value == SP_SCALE24_MAX));
1870 style->opacity.set = ( style->opacity.inherit
1871 || style->opacity.value < SP_SCALE24_MAX );
1872 }
1874 /* display is in principle similar to opacity, but implementation is easier. */
1875 if ( parent->display.set && !parent->display.inherit
1876 && parent->display.value == SP_CSS_DISPLAY_NONE ) {
1877 style->display.value = SP_CSS_DISPLAY_NONE;
1878 style->display.set = true;
1879 style->display.inherit = false;
1880 } else if (style->display.inherit) {
1881 style->display.value = parent->display.value;
1882 style->display.set = parent->display.set;
1883 style->display.inherit = parent->display.inherit;
1884 } else {
1885 /* Leave as is. (display doesn't inherit by default.) */
1886 }
1888 /** \todo
1889 * fixme: Check that we correctly handle all properties that don't
1890 * inherit by default (as shown in
1891 * http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties).
1892 */
1893 }
1895 /* SPIPaint properties (including color). */
1896 {
1897 /** \todo
1898 * Think about the issues involved if specified as currentColor or
1899 * if specified relative to colorProfile, and if the currentColor or
1900 * colorProfile differs between parent \& child. See also comments
1901 * elsewhere in this function about URIs.
1902 */
1903 SPIPaint SPStyle::*const fields[] = {
1904 &SPStyle::color,
1905 &SPStyle::fill,
1906 &SPStyle::stroke
1907 };
1908 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1909 SPIPaint SPStyle::*const fld = fields[i];
1910 sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld);
1911 }
1912 }
1914 /* Things from SVG 1.2 or CSS3. */
1915 {
1916 /* Note: If we ever support setting string values for text-align then we'd need strdup
1917 * handling here. */
1918 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align);
1920 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform);
1921 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression);
1922 }
1924 /* Note: this will need length handling once dasharray supports units. */
1925 if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit )
1926 && parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit )
1927 {
1928 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1929 if (style->stroke_dash.n_dash > 0) {
1930 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1931 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1932 }
1933 style->stroke_dasharray_set = parent->stroke_dasharray_set;
1934 style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit;
1935 }
1937 /* Note: this will need length handling once dasharray_offset supports units. */
1938 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1939 style->stroke_dash.offset = parent->stroke_dash.offset;
1940 style->stroke_dashoffset_set = parent->stroke_dashoffset_set;
1941 /* fixme: we don't currently allow stroke-dashoffset to be `inherit'. TODO: Try to
1942 * represent it as a normal SPILength; though will need to do something about existing
1943 * users of stroke_dash.offset and stroke_dashoffset_set. */
1944 }
1945 }
1949 /**
1950 * Disconnects from possible fill and stroke paint servers.
1951 */
1952 static void
1953 sp_style_paint_server_release(SPPaintServer *server, SPStyle *style)
1954 {
1955 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1956 && (server == style->fill.value.paint.server))
1957 {
1958 sp_style_paint_clear(style, &style->fill);
1959 }
1961 if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
1962 && (server == style->stroke.value.paint.server))
1963 {
1964 sp_style_paint_clear(style, &style->stroke);
1965 }
1966 }
1971 /**
1972 * Emit style modified signal on style's object if server is style's fill
1973 * or stroke paint server.
1974 */
1975 static void
1976 sp_style_paint_server_modified(SPPaintServer *server, guint flags, SPStyle *style)
1977 {
1978 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1979 && (server == style->fill.value.paint.server))
1980 {
1981 if (style->object) {
1982 /** \todo
1983 * fixme: I do not know, whether it is optimal - we are
1984 * forcing reread of everything (Lauris)
1985 */
1986 /** \todo
1987 * fixme: We have to use object_modified flag, because parent
1988 * flag is only available downstreams.
1989 */
1990 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1991 }
1992 } else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
1993 && (server == style->stroke.value.paint.server))
1994 {
1995 if (style->object) {
1996 /// \todo fixme:
1997 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
1998 }
1999 } else {
2000 g_assert_not_reached();
2001 }
2002 }
2006 /**
2007 *
2008 */
2009 static void
2010 sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
2011 {
2012 sp_style_paint_clear(style, paint);
2014 if ((paint->set && paint->currentcolor) || parent->currentcolor) {
2015 paint->currentcolor = TRUE;
2016 paint->type = SP_PAINT_TYPE_COLOR;
2017 sp_color_copy(&paint->value.color, &style->color.value.color);
2018 return;
2019 }
2021 paint->type = parent->type;
2022 switch (paint->type) {
2023 case SP_PAINT_TYPE_COLOR:
2024 sp_color_copy(&paint->value.color, &parent->value.color);
2025 break;
2026 case SP_PAINT_TYPE_PAINTSERVER:
2027 paint->value.paint.server = parent->value.paint.server;
2028 paint->value.paint.uri = parent->value.paint.uri;
2029 if (paint->value.paint.server) {
2030 if (style->object && !style->cloned) { // href paintserver for style of non-clones only
2031 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
2032 if (paint == &style->fill) {
2033 style->fill_hreffed = true;
2034 } else {
2035 assert(paint == &style->stroke);
2036 style->stroke_hreffed = true;
2037 }
2038 }
2039 if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
2040 g_signal_connect(G_OBJECT(paint->value.paint.server), "release",
2041 G_CALLBACK(sp_style_paint_server_release), style);
2042 g_signal_connect(G_OBJECT(paint->value.paint.server), "modified",
2043 G_CALLBACK(sp_style_paint_server_modified), style);
2044 if (paint == &style->fill) {
2045 style->fill_listening = true;
2046 } else {
2047 assert(paint == &style->stroke);
2048 style->stroke_listening = true;
2049 }
2050 }
2051 }
2052 break;
2053 case SP_PAINT_TYPE_NONE:
2054 break;
2055 default:
2056 g_assert_not_reached();
2057 break;
2058 }
2059 }
2062 /**
2063 * Merge filter style from parent.
2064 * Filter effects do not inherit by default
2065 */
2066 static void
2067 sp_style_merge_ifilter(SPIFilter *child, SPIFilter const *parent)
2068 {
2069 child->set = parent->set;
2070 child->inherit = parent->inherit;
2071 child->filter = parent->filter;
2072 child->uri = parent->uri;
2073 }
2075 /**
2076 * Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or
2077 * SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's
2078 * complete cascaded style to style_clipboard. When you need a CSS string
2079 * for an object in the document tree, you normally call
2080 * sp_style_write_difference instead to take into account the object's parent.
2081 *
2082 * \pre style != NULL.
2083 * \pre flags in {IFSET, ALWAYS}.
2084 * \post ret != NULL.
2085 */
2086 gchar *
2087 sp_style_write_string(SPStyle const *const style, guint const flags)
2088 {
2089 /** \todo
2090 * Merge with write_difference, much duplicate code!
2091 */
2092 g_return_val_if_fail(style != NULL, NULL);
2093 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
2094 (flags == SP_STYLE_FLAG_ALWAYS) ),
2095 NULL);
2097 gchar c[BMAX];
2098 gchar *p = c;
2099 *p = '\0';
2101 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags);
2102 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags);
2103 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags);
2104 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags);
2105 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags);
2107 /* Text */
2108 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags);
2109 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags);
2110 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags);
2111 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags);
2112 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags);
2113 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags);
2114 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags);
2115 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags);
2116 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags);
2117 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags);
2119 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags);
2121 /// \todo fixme: Per type methods need default flag too (lauris)
2122 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags);
2123 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags);
2124 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags);
2125 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags);
2126 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags);
2127 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags);
2128 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags);
2129 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags);
2130 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags);
2132 marker_status("sp_style_write_string: Writing markers");
2133 if (style->marker[SP_MARKER_LOC].set) {
2134 p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value);
2135 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2136 p += g_snprintf(p, c + BMAX - p, "marker:none;");
2137 }
2138 if (style->marker[SP_MARKER_LOC_START].set) {
2139 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value);
2140 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2141 p += g_snprintf(p, c + BMAX - p, "marker-start:none;");
2142 }
2143 if (style->marker[SP_MARKER_LOC_MID].set) {
2144 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value);
2145 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2146 p += g_snprintf(p, c + BMAX - p, "marker-mid:none;");
2147 }
2148 if (style->marker[SP_MARKER_LOC_END].set) {
2149 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value);
2150 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2151 p += g_snprintf(p, c + BMAX - p, "marker-end:none;");
2152 }
2154 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags);
2156 /** \todo fixme: */
2157 if ((flags == SP_STYLE_FLAG_ALWAYS)
2158 || style->stroke_dasharray_set)
2159 {
2160 if (style->stroke_dasharray_inherit) {
2161 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2162 } else if (style->stroke_dash.n_dash && style->stroke_dash.dash) {
2163 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2164 gint i;
2165 for (i = 0; i < style->stroke_dash.n_dash; i++) {
2166 Inkscape::CSSOStringStream os;
2167 if (i) {
2168 os << ", ";
2169 }
2170 os << style->stroke_dash.dash[i];
2171 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2172 }
2173 if (p < c + BMAX) {
2174 *p++ = ';';
2175 }
2176 } else {
2177 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;");
2178 }
2179 }
2181 /** \todo fixme: */
2182 if (style->stroke_dashoffset_set) {
2183 Inkscape::CSSOStringStream os;
2184 os << "stroke-dashoffset:" << style->stroke_dash.offset << ";";
2185 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2186 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2187 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;");
2188 }
2190 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags);
2192 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags);
2193 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags);
2194 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags);
2196 /* fixme: */
2197 p += sp_text_style_write(p, c + BMAX - p, style->text, flags);
2199 /* Get rid of trailing `;'. */
2200 if (p != c) {
2201 --p;
2202 if (*p == ';') {
2203 *p = '\0';
2204 }
2205 }
2207 return g_strdup(c);
2208 }
2211 #define STYLE_BUF_MAX
2214 /**
2215 * Dumps style to CSS string, see sp_style_write_string()
2216 *
2217 * \pre from != NULL.
2218 * \pre to != NULL.
2219 * \post ret != NULL.
2220 */
2221 gchar *
2222 sp_style_write_difference(SPStyle const *const from, SPStyle const *const to)
2223 {
2224 g_return_val_if_fail(from != NULL, NULL);
2225 g_return_val_if_fail(to != NULL, NULL);
2227 gchar c[BMAX], *p = c;
2228 *p = '\0';
2230 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF);
2231 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF);
2232 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF);
2233 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF);
2234 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF);
2236 /* Text */
2237 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF);
2238 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF);
2239 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF);
2240 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF);
2241 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF);
2242 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF);
2243 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF);
2244 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF);
2245 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF);
2246 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF);
2248 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF);
2250 /// \todo fixme: Per type methods need default flag too
2251 if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) {
2252 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET);
2253 }
2254 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET);
2255 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF);
2256 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF);
2257 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF);
2258 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF);
2259 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF);
2260 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap,
2261 &from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF);
2262 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin,
2263 &from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF);
2264 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit",
2265 &from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF);
2266 /** \todo fixme: */
2267 if (from->stroke_dasharray_set) {
2268 if (from->stroke_dasharray_inherit) {
2269 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2270 } else if (from->stroke_dash.n_dash && from->stroke_dash.dash) {
2271 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2272 for (gint i = 0; i < from->stroke_dash.n_dash; i++) {
2273 Inkscape::CSSOStringStream os;
2274 if (i) {
2275 os << ", ";
2276 }
2277 os << from->stroke_dash.dash[i];
2278 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2279 }
2280 p += g_snprintf(p, c + BMAX - p, ";");
2281 }
2282 }
2283 /* fixme: */
2284 if (from->stroke_dashoffset_set) {
2285 Inkscape::CSSOStringStream os;
2286 os << "stroke-dashoffset:" << from->stroke_dash.offset << ";";
2287 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2288 }
2289 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF);
2291 /* markers */
2292 marker_status("sp_style_write_difference: Writing markers");
2293 if (from->marker[SP_MARKER_LOC].value != NULL) {
2294 p += g_snprintf(p, c + BMAX - p, "marker:%s;", from->marker[SP_MARKER_LOC].value);
2295 }
2296 if (from->marker[SP_MARKER_LOC_START].value != NULL) {
2297 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value);
2298 }
2299 if (from->marker[SP_MARKER_LOC_MID].value != NULL) {
2300 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value);
2301 }
2302 if (from->marker[SP_MARKER_LOC_END].value != NULL) {
2303 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value);
2304 }
2306 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET);
2307 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET);
2308 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET);
2310 p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF);
2312 /** \todo
2313 * The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF
2314 * flag is mainly only for attributes that don't handle explicit unset well.
2315 * We may need to revisit the behaviour of this routine.
2316 */
2318 /* Get rid of trailing `;'. */
2319 if (p != c) {
2320 --p;
2321 if (*p == ';') {
2322 *p = '\0';
2323 }
2324 }
2326 return g_strdup(c);
2327 }
2331 /**
2332 * Reset all style properties.
2333 */
2334 static void
2335 sp_style_clear(SPStyle *style)
2336 {
2337 g_return_if_fail(style != NULL);
2339 sp_style_paint_clear(style, &style->fill);
2340 sp_style_paint_clear(style, &style->stroke);
2341 if (style->stroke_dash.dash) {
2342 g_free(style->stroke_dash.dash);
2343 }
2345 /** \todo fixme: Do that text manipulation via parents */
2346 SPObject *object = style->object;
2347 gint const refcount = style->refcount;
2348 SPTextStyle *text = style->text;
2349 unsigned const text_private = style->text_private;
2350 memset(style, 0, sizeof(SPStyle));
2351 style->refcount = refcount;
2352 style->object = object;
2353 style->text = text;
2354 style->text_private = text_private;
2355 /* fixme: */
2356 style->text->font.set = FALSE;
2357 style->text->font_family.set = FALSE;
2359 style->font_size.set = FALSE;
2360 style->font_size.type = SP_FONT_SIZE_LITERAL;
2361 style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM;
2362 style->font_size.computed = 12.0;
2363 style->font_style.set = FALSE;
2364 style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL;
2365 style->font_variant.set = FALSE;
2366 style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL;
2367 style->font_weight.set = FALSE;
2368 style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL;
2369 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
2370 style->font_stretch.set = FALSE;
2371 style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL;
2373 /* text */
2374 style->text_indent.set = FALSE;
2375 style->text_indent.unit = SP_CSS_UNIT_NONE;
2376 style->text_indent.computed = 0.0;
2378 style->text_align.set = FALSE;
2379 style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START;
2381 style->text_decoration.set = FALSE;
2382 style->text_decoration.underline = FALSE;
2383 style->text_decoration.overline = FALSE;
2384 style->text_decoration.line_through = FALSE;
2385 style->text_decoration.blink = FALSE;
2387 style->line_height.set = FALSE;
2388 style->line_height.unit = SP_CSS_UNIT_PERCENT;
2389 style->line_height.normal = TRUE;
2390 style->line_height.value = style->line_height.computed = 1.0;
2392 style->letter_spacing.set = FALSE;
2393 style->letter_spacing.unit = SP_CSS_UNIT_NONE;
2394 style->letter_spacing.normal = TRUE;
2395 style->letter_spacing.value = style->letter_spacing.computed = 0.0;
2397 style->word_spacing.set = FALSE;
2398 style->word_spacing.unit = SP_CSS_UNIT_NONE;
2399 style->word_spacing.normal = TRUE;
2400 style->word_spacing.value = style->word_spacing.computed = 0.0;
2402 style->text_transform.set = FALSE;
2403 style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE;
2405 style->direction.set = FALSE;
2406 style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR;
2408 style->block_progression.set = FALSE;
2409 style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB;
2411 style->writing_mode.set = FALSE;
2412 style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB;
2415 style->text_anchor.set = FALSE;
2416 style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START;
2419 style->opacity.value = SP_SCALE24_MAX;
2420 style->visibility.set = FALSE;
2421 style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE;
2422 style->display.set = FALSE;
2423 style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE;
2424 style->overflow.set = FALSE;
2425 style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE;
2427 style->color.type = SP_PAINT_TYPE_COLOR;
2428 sp_color_set_rgb_float(&style->color.value.color, 0.0, 0.0, 0.0);
2430 style->fill.type = SP_PAINT_TYPE_COLOR;
2431 sp_color_set_rgb_float(&style->fill.value.color, 0.0, 0.0, 0.0);
2432 style->fill_opacity.value = SP_SCALE24_MAX;
2433 style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO;
2435 style->stroke.type = SP_PAINT_TYPE_NONE;
2436 style->stroke.set = FALSE;
2437 sp_color_set_rgb_float(&style->stroke.value.color, 0.0, 0.0, 0.0);
2438 style->stroke_opacity.value = SP_SCALE24_MAX;
2440 style->stroke_width.set = FALSE;
2441 style->stroke_width.unit = SP_CSS_UNIT_NONE;
2442 style->stroke_width.computed = 1.0;
2444 style->stroke_linecap.set = FALSE;
2445 style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT;
2446 style->stroke_linejoin.set = FALSE;
2447 style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER;
2449 style->stroke_miterlimit.set = FALSE;
2450 style->stroke_miterlimit.value = 4.0;
2452 style->stroke_dash.n_dash = 0;
2453 style->stroke_dash.dash = NULL;
2454 style->stroke_dash.offset = 0.0;
2456 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
2457 g_free(style->marker[i].value);
2458 style->marker[i].set = FALSE;
2459 }
2460 }
2464 /**
2465 *
2466 */
2467 static void
2468 sp_style_read_dash(SPStyle *style, gchar const *str)
2469 {
2470 /* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */
2471 style->stroke_dasharray_set = TRUE;
2473 if (strcmp(str, "inherit") == 0) {
2474 style->stroke_dasharray_inherit = true;
2475 return;
2476 }
2477 style->stroke_dasharray_inherit = false;
2479 NRVpathDash &dash = style->stroke_dash;
2480 g_free(dash.dash);
2481 dash.dash = NULL;
2483 if (strcmp(str, "none") == 0) {
2484 dash.n_dash = 0;
2485 return;
2486 }
2488 gint n_dash = 0;
2489 gdouble d[64];
2490 gchar *e = NULL;
2492 bool LineSolid=true;
2493 while (e != str && n_dash < 64) {
2494 /* TODO: Should allow <length> rather than just a unitless (px) number. */
2495 d[n_dash] = g_ascii_strtod(str, (char **) &e);
2496 if (d[n_dash] > 0.00000001)
2497 LineSolid = false;
2498 if (e != str) {
2499 n_dash += 1;
2500 str = e;
2501 }
2502 while (str && *str && !isalnum(*str)) str += 1;
2503 }
2505 if (LineSolid) {
2506 dash.n_dash = 0;
2507 return;
2508 }
2510 if (n_dash > 0) {
2511 dash.dash = g_new(gdouble, n_dash);
2512 memcpy(dash.dash, d, sizeof(gdouble) * n_dash);
2513 dash.n_dash = n_dash;
2514 }
2515 }
2518 /*#########################
2519 ## SPTextStyle operations
2520 #########################*/
2523 /**
2524 * Return new SPTextStyle object with default settings.
2525 */
2526 static SPTextStyle *
2527 sp_text_style_new()
2528 {
2529 SPTextStyle *ts = g_new0(SPTextStyle, 1);
2530 ts->refcount = 1;
2531 sp_text_style_clear(ts);
2533 ts->font.value = g_strdup("Bitstream Vera Sans");
2534 ts->font_family.value = g_strdup("Bitstream Vera Sans");
2536 return ts;
2537 }
2540 /**
2541 * Clear text style settings.
2542 */
2543 static void
2544 sp_text_style_clear(SPTextStyle *ts)
2545 {
2546 ts->font.set = FALSE;
2547 ts->font_family.set = FALSE;
2548 }
2552 /**
2553 * Reduce refcount of text style and possibly free it.
2554 */
2555 static SPTextStyle *
2556 sp_text_style_unref(SPTextStyle *st)
2557 {
2558 st->refcount -= 1;
2560 if (st->refcount < 1) {
2561 g_free(st->font.value);
2562 g_free(st->font_family.value);
2563 g_free(st);
2564 }
2566 return NULL;
2567 }
2571 /**
2572 * Return duplicate of text style.
2573 */
2574 static SPTextStyle *
2575 sp_text_style_duplicate_unset(SPTextStyle *st)
2576 {
2577 SPTextStyle *nt = g_new0(SPTextStyle, 1);
2578 nt->refcount = 1;
2580 nt->font.value = g_strdup(st->font.value);
2581 nt->font_family.value = g_strdup(st->font_family.value);
2583 return nt;
2584 }
2588 /**
2589 * Write SPTextStyle object into string.
2590 */
2591 static guint
2592 sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags)
2593 {
2594 gint d = 0;
2596 // We do not do diffing for text style
2597 if (flags == SP_STYLE_FLAG_IFDIFF)
2598 flags = SP_STYLE_FLAG_IFSET;
2600 d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags);
2601 return d;
2602 }
2606 /* The following sp_tyle_read_* functions ignore invalid values, as per
2607 * http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors.
2608 *
2609 * [However, the SVG spec is somewhat unclear as to whether the style attribute should
2610 * be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE
2611 * pairs, in which case SVG's error-handling rules
2612 * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.]
2613 */
2616 /**
2617 * Set SPIFloat object from string.
2618 */
2619 static void
2620 sp_style_read_ifloat(SPIFloat *val, gchar const *str)
2621 {
2622 if (!strcmp(str, "inherit")) {
2623 val->set = TRUE;
2624 val->inherit = TRUE;
2625 } else {
2626 gfloat value;
2627 if (sp_svg_number_read_f(str, &value)) {
2628 val->set = TRUE;
2629 val->inherit = FALSE;
2630 val->value = value;
2631 }
2632 }
2633 }
2637 /**
2638 * Set SPIScale24 object from string.
2639 */
2640 static void
2641 sp_style_read_iscale24(SPIScale24 *val, gchar const *str)
2642 {
2643 if (!strcmp(str, "inherit")) {
2644 val->set = TRUE;
2645 val->inherit = TRUE;
2646 } else {
2647 gfloat value;
2648 if (sp_svg_number_read_f(str, &value)) {
2649 val->set = TRUE;
2650 val->inherit = FALSE;
2651 value = CLAMP(value, 0.0f, (gfloat) SP_SCALE24_MAX);
2652 val->value = SP_SCALE24_FROM_FLOAT(value);
2653 }
2654 }
2655 }
2657 /**
2658 * Reads a style value and performs lookup based on the given style value enumerations.
2659 */
2660 static void
2661 sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict,
2662 bool const can_explicitly_inherit)
2663 {
2664 if ( can_explicitly_inherit && !strcmp(str, "inherit") ) {
2665 val->set = TRUE;
2666 val->inherit = TRUE;
2667 } else {
2668 for (unsigned i = 0; dict[i].key; i++) {
2669 if (!strcmp(str, dict[i].key)) {
2670 val->set = TRUE;
2671 val->inherit = FALSE;
2672 val->value = dict[i].value;
2673 /* Save copying for values not needing it */
2674 val->computed = val->value;
2675 break;
2676 }
2677 }
2678 }
2679 }
2683 /**
2684 * Set SPIString object from string.
2685 */
2686 static void
2687 sp_style_read_istring(SPIString *val, gchar const *str)
2688 {
2689 g_free(val->value);
2691 if (!strcmp(str, "inherit")) {
2692 val->set = TRUE;
2693 val->inherit = TRUE;
2694 val->value = NULL;
2695 } else {
2696 val->set = TRUE;
2697 val->inherit = FALSE;
2698 val->value = g_strdup(str);
2699 }
2700 }
2704 /**
2705 * Set SPILength object from string.
2706 */
2707 static void
2708 sp_style_read_ilength(SPILength *val, gchar const *str)
2709 {
2710 if (!strcmp(str, "inherit")) {
2711 val->set = TRUE;
2712 val->inherit = TRUE;
2713 } else {
2714 gdouble value;
2715 gchar *e;
2716 /** \todo fixme: Move this to standard place (Lauris) */
2717 value = g_ascii_strtod(str, &e);
2718 if ((gchar const *) e != str) {
2719 /** \todo
2720 * Allow the number of px per inch to vary (document preferences,
2721 * X server or whatever). E.g. don't fill in computed here, do
2722 * it at the same time as percentage units are done.
2723 */
2724 if (!*e) {
2725 /* Userspace */
2726 val->unit = SP_CSS_UNIT_NONE;
2727 val->computed = value;
2728 } else if (!strcmp(e, "px")) {
2729 /* Userspace */
2730 val->unit = SP_CSS_UNIT_PX;
2731 val->computed = value;
2732 } else if (!strcmp(e, "pt")) {
2733 /* Userspace / DEVICESCALE */
2734 val->unit = SP_CSS_UNIT_PT;
2735 val->computed = value * PX_PER_PT;
2736 } else if (!strcmp(e, "pc")) {
2737 /* 1 pica = 12pt; FIXME: add it to SPUnit */
2738 val->unit = SP_CSS_UNIT_PC;
2739 val->computed = value * PX_PER_PT * 12;
2740 } else if (!strcmp(e, "mm")) {
2741 val->unit = SP_CSS_UNIT_MM;
2742 val->computed = value * PX_PER_MM;
2743 } else if (!strcmp(e, "cm")) {
2744 val->unit = SP_CSS_UNIT_CM;
2745 val->computed = value * PX_PER_CM;
2746 } else if (!strcmp(e, "in")) {
2747 val->unit = SP_CSS_UNIT_IN;
2748 val->computed = value * PX_PER_IN;
2749 } else if (!strcmp(e, "em")) {
2750 /* EM square */
2751 val->unit = SP_CSS_UNIT_EM;
2752 val->value = value;
2753 } else if (!strcmp(e, "ex")) {
2754 /* ex square */
2755 val->unit = SP_CSS_UNIT_EX;
2756 val->value = value;
2757 } else if (!strcmp(e, "%")) {
2758 /* Percentage */
2759 val->unit = SP_CSS_UNIT_PERCENT;
2760 val->value = value * 0.01;
2761 } else {
2762 /* Invalid */
2763 return;
2764 }
2765 val->set = TRUE;
2766 val->inherit = FALSE;
2767 }
2768 }
2769 }
2771 /**
2772 * Set SPILengthOrNormal object from string.
2773 */
2774 static void
2775 sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str)
2776 {
2777 if (!strcmp(str, "normal")) {
2778 val->set = TRUE;
2779 val->inherit = FALSE;
2780 val->normal = TRUE;
2781 val->unit = SP_CSS_UNIT_NONE;
2782 val->value = val->computed = 0.0;
2783 } else {
2784 SPILength length;
2785 sp_style_read_ilength(&length, str);
2786 val->set = length.set;
2787 val->inherit = length.inherit;
2788 val->normal = FALSE;
2789 val->unit = length.unit;
2790 val->value = length.value;
2791 val->computed = length.computed;
2792 }
2793 }
2795 /**
2796 * Set SPITextDecoration object from string.
2797 */
2798 static void
2799 sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str)
2800 {
2801 if (!strcmp(str, "inherit")) {
2802 val->set = TRUE;
2803 val->inherit = TRUE;
2804 } else if (!strcmp(str, "none")) {
2805 val->set = TRUE;
2806 val->inherit = FALSE;
2807 val->underline = FALSE;
2808 val->overline = FALSE;
2809 val->line_through = FALSE;
2810 val->blink = FALSE;
2811 } else {
2812 bool found_underline = false;
2813 bool found_overline = false;
2814 bool found_line_through = false;
2815 bool found_blink = false;
2816 for ( ; *str ; str++ ) {
2817 if (*str == ' ') continue;
2818 if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) {
2819 found_underline = true;
2820 str += 9;
2821 } else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) {
2822 found_overline = true;
2823 str += 8;
2824 } else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) {
2825 found_line_through = true;
2826 str += 12;
2827 } else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) {
2828 found_blink = true;
2829 str += 5;
2830 } else {
2831 return; // invalid value
2832 }
2833 }
2834 if (!(found_underline || found_overline || found_line_through || found_blink)) {
2835 return; // invalid value: empty
2836 }
2837 val->set = TRUE;
2838 val->inherit = FALSE;
2839 val->underline = found_underline;
2840 val->overline = found_overline;
2841 val->line_through = found_line_through;
2842 val->blink = found_blink;
2843 }
2844 }
2846 /**
2847 * Set SPIPaint object from string containing an integer value.
2848 * \param document Ignored
2849 */
2850 static void
2851 sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2852 {
2853 paint->currentcolor = FALSE; /* currentColor not a valid <color>. */
2854 if (!strcmp(str, "inherit")) {
2855 paint->set = TRUE;
2856 paint->inherit = TRUE;
2857 } else {
2858 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
2859 if (rgb0 != 0xff) {
2860 paint->type = SP_PAINT_TYPE_COLOR;
2861 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2862 paint->set = TRUE;
2863 paint->inherit = FALSE;
2864 }
2865 }
2866 }
2869 /**
2870 * Set SPIPaint object from string.
2871 *
2872 * \pre paint == \&style.fill || paint == \&style.stroke.
2873 */
2874 static void
2875 sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2876 {
2877 while (isspace(*str)) {
2878 ++str;
2879 }
2881 if (streq(str, "inherit")) {
2882 paint->set = TRUE;
2883 paint->inherit = TRUE;
2884 paint->currentcolor = FALSE;
2885 } else if (streq(str, "currentColor") && paint != &style->color) {
2886 paint->set = TRUE;
2887 paint->inherit = FALSE;
2888 paint->currentcolor = TRUE;
2889 } else if (streq(str, "none") && paint != &style->color) {
2890 paint->type = SP_PAINT_TYPE_NONE;
2891 paint->set = TRUE;
2892 paint->inherit = FALSE;
2893 paint->currentcolor = FALSE;
2894 } else if (strneq(str, "url", 3) && paint != &style->color) {
2895 // this is alloc'd uri, but seems to be shared with a parent
2896 // potentially, so it's not any easy g_free case...
2897 paint->value.paint.uri = extract_uri(str);
2898 if (paint->value.paint.uri == NULL || *(paint->value.paint.uri) == '\0') {
2899 paint->type = SP_PAINT_TYPE_NONE;
2900 return;
2901 }
2902 paint->type = SP_PAINT_TYPE_PAINTSERVER;
2903 paint->set = TRUE;
2904 paint->inherit = FALSE;
2905 paint->currentcolor = FALSE;
2906 if (document) {
2907 SPObject *ps = sp_uri_reference_resolve(document, str);
2908 if (ps && SP_IS_PAINT_SERVER(ps)) {
2909 paint->value.paint.server = SP_PAINT_SERVER(ps);
2910 if (style->object && !style->cloned) {
2911 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
2912 if (paint == &style->fill) {
2913 style->fill_hreffed = true;
2914 } else {
2915 assert(paint == &style->stroke);
2916 style->stroke_hreffed = true;
2917 }
2918 }
2919 if (style->object || style->cloned) {
2920 g_signal_connect(G_OBJECT(paint->value.paint.server), "release",
2921 G_CALLBACK(sp_style_paint_server_release), style);
2922 g_signal_connect(G_OBJECT(paint->value.paint.server), "modified",
2923 G_CALLBACK(sp_style_paint_server_modified), style);
2924 if (paint == &style->fill) {
2925 style->fill_listening = true;
2926 } else {
2927 assert(paint == &style->stroke);
2928 style->stroke_listening = true;
2929 }
2930 }
2931 } else {
2932 paint->value.paint.server = NULL;
2933 }
2934 }
2935 } else {
2936 guint32 const rgb0 = sp_svg_read_color(str, &str, 0xff);
2937 if (rgb0 != 0xff) {
2938 paint->type = SP_PAINT_TYPE_COLOR;
2939 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2940 paint->set = TRUE;
2941 paint->inherit = FALSE;
2942 paint->currentcolor = FALSE;
2944 while (g_ascii_isspace(*str)) {
2945 ++str;
2946 }
2947 if (strneq(str, "icc-color(", 10)) {
2948 SVGICCColor* tmp = new SVGICCColor();
2949 if ( ! sp_svg_read_icc_color( str, &str, tmp ) ) {
2950 delete tmp;
2951 tmp = 0;
2952 }
2953 paint->iccColor = tmp;
2954 }
2955 }
2956 }
2957 }
2961 /**
2962 * Set SPIFontSize object from string.
2963 */
2964 static void
2965 sp_style_read_ifontsize(SPIFontSize *val, gchar const *str)
2966 {
2967 if (!strcmp(str, "inherit")) {
2968 val->set = TRUE;
2969 val->inherit = TRUE;
2970 } else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) {
2971 for (unsigned i = 0; enum_font_size[i].key; i++) {
2972 if (!strcmp(str, enum_font_size[i].key)) {
2973 val->set = TRUE;
2974 val->inherit = FALSE;
2975 val->type = SP_FONT_SIZE_LITERAL;
2976 val->value = enum_font_size[i].value;
2977 return;
2978 }
2979 }
2980 /* Invalid */
2981 return;
2982 } else {
2983 gdouble value;
2984 gchar *e;
2985 /* fixme: Move this to standard place (Lauris) */
2986 value = g_ascii_strtod(str, &e);
2987 if ((gchar const *) e != str) {
2988 if (!*e) {
2989 /* Userspace */
2990 } else if (!strcmp(e, "px")) {
2991 /* Userspace */
2992 } else if (!strcmp(e, "pt")) {
2993 /* Userspace * DEVICESCALE */
2994 value *= PX_PER_PT;
2995 } else if (!strcmp(e, "pc")) {
2996 /* 12pt */
2997 value *= PX_PER_PT * 12.0;
2998 } else if (!strcmp(e, "mm")) {
2999 value *= PX_PER_MM;
3000 } else if (!strcmp(e, "cm")) {
3001 value *= PX_PER_CM;
3002 } else if (!strcmp(e, "in")) {
3003 value *= PX_PER_IN;
3004 } else if (!strcmp(e, "%")) {
3005 /* Percentage */
3006 val->set = TRUE;
3007 val->inherit = FALSE;
3008 val->type = SP_FONT_SIZE_PERCENTAGE;
3009 val->value = SP_F8_16_FROM_FLOAT(value / 100.0);
3010 return;
3011 } else {
3012 /* Invalid */
3013 return;
3014 }
3015 /* Length */
3016 val->set = TRUE;
3017 val->inherit = FALSE;
3018 val->type = SP_FONT_SIZE_LENGTH;
3019 val->computed = value;
3020 return;
3021 }
3022 }
3023 }
3027 /**
3028 * Set SPIFilter object from string.
3029 */
3030 static void
3031 sp_style_read_ifilter(SPIFilter *f, gchar const *str, SPDocument *document)
3032 {
3033 /* Try all possible values: inherit, none, uri */
3034 if (streq(str, "inherit")) {
3035 f->set = TRUE;
3036 f->inherit = TRUE;
3037 f->filter = NULL;
3038 } else if(streq(str, "none")) {
3039 f->set = TRUE;
3040 f->inherit = FALSE;
3041 f->filter = NULL;
3042 } else if (strneq(str, "url", 3)) {
3043 f->uri = extract_uri(str);
3044 if(f->uri == NULL || f->uri[0] == '\0') {
3045 g_warning("Specified filter url is empty");
3046 f->set = TRUE;
3047 f->inherit = FALSE;
3048 f->filter = NULL;
3049 return;
3050 }
3051 f->set = TRUE;
3052 f->inherit = FALSE;
3053 f->filter = NULL;
3054 if (document) {
3055 SPObject *obj;
3056 obj = sp_uri_reference_resolve(document, str);
3057 if (SP_IS_FILTER(obj)) {
3058 f->filter = SP_FILTER(obj);
3059 //g_signal_connect(G_OBJECT(f->filter), "release",
3060 // G_CALLBACK(sp_style_filter_release), style);
3061 //g_signal_connect(G_OBJECT(f->filter), "modified",
3062 // G_CALLBACK(sp_style_filter_modified), style);
3063 } else {
3064 g_warning("Element '%s' not found or is not a filter", f->uri);
3065 }
3066 }
3068 } else {
3069 /* We shouldn't reach this if SVG input is well-formed */
3070 f->set = FALSE;
3071 f->inherit = FALSE;
3072 f->filter = NULL;
3073 f->uri = NULL;
3074 }
3075 }
3077 /**
3078 * Set SPIEnum object from repr attribute.
3079 */
3080 static void
3081 sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr,
3082 gchar const *key, SPStyleEnum const *dict,
3083 bool const can_explicitly_inherit)
3084 {
3085 gchar const *str = repr->attribute(key);
3086 if (str) {
3087 sp_style_read_ienum(val, str, dict, can_explicitly_inherit);
3088 }
3089 }
3093 /**
3094 * Set SPILength object from repr attribute.
3095 */
3096 static void
3097 sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key)
3098 {
3099 gchar const *str = repr->attribute(key);
3100 if (str) {
3101 sp_style_read_ilength(val, str);
3102 }
3103 }
3105 /**
3106 * Set SPIFontSize object from repr attribute.
3107 */
3108 static void
3109 sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key)
3110 {
3111 gchar const *str = repr->attribute(key);
3112 if (str) {
3113 sp_style_read_ifontsize(val, str);
3114 }
3115 }
3118 /**
3119 * Set SPIFloat object from repr attribute.
3120 */
3121 static void
3122 sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key)
3123 {
3124 gchar const *str = repr->attribute(key);
3125 if (str) {
3126 sp_style_read_ifloat(val, str);
3127 }
3128 }
3131 /**
3132 * Write SPIFloat object into string.
3133 */
3134 static gint
3135 sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key,
3136 SPIFloat const *const val, SPIFloat const *const base, guint const flags)
3137 {
3138 Inkscape::CSSOStringStream os;
3140 if ((flags & SP_STYLE_FLAG_ALWAYS)
3141 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3142 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3143 && (!base->set || (val->value != base->value))))
3144 {
3145 if (val->inherit) {
3146 return g_snprintf(p, len, "%s:inherit;", key);
3147 } else {
3148 os << key << ":" << val->value << ";";
3149 return g_strlcpy(p, os.str().c_str(), len);
3150 }
3151 }
3152 return 0;
3153 }
3156 /**
3157 * Write SPIScale24 object into string.
3158 */
3159 static gint
3160 sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key,
3161 SPIScale24 const *const val, SPIScale24 const *const base,
3162 guint const flags)
3163 {
3164 Inkscape::CSSOStringStream os;
3166 if ((flags & SP_STYLE_FLAG_ALWAYS)
3167 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3168 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3169 && (!base->set || (val->value != base->value))))
3170 {
3171 if (val->inherit) {
3172 return g_snprintf(p, len, "%s:inherit;", key);
3173 } else {
3174 os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";";
3175 return g_strlcpy(p, os.str().c_str(), len);
3176 }
3177 }
3178 return 0;
3179 }
3182 /**
3183 * Write SPIEnum object into string.
3184 */
3185 static gint
3186 sp_style_write_ienum(gchar *p, gint const len, gchar const *const key,
3187 SPStyleEnum const *const dict,
3188 SPIEnum const *const val, SPIEnum const *const base, guint const flags)
3189 {
3190 if ((flags & SP_STYLE_FLAG_ALWAYS)
3191 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3192 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3193 && (!base->set || (val->computed != base->computed))))
3194 {
3195 if (val->inherit) {
3196 return g_snprintf(p, len, "%s:inherit;", key);
3197 }
3198 for (unsigned i = 0; dict[i].key; i++) {
3199 if (dict[i].value == static_cast< gint > (val->value) ) {
3200 return g_snprintf(p, len, "%s:%s;", key, dict[i].key);
3201 }
3202 }
3203 }
3204 return 0;
3205 }
3209 /**
3210 * Write SPIString object into string.
3211 */
3212 static gint
3213 sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
3214 SPIString const *const val, SPIString const *const base, guint const flags)
3215 {
3216 if ((flags & SP_STYLE_FLAG_ALWAYS)
3217 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3218 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3219 && (!base->set || strcmp(val->value, base->value))))
3220 {
3221 if (val->inherit) {
3222 return g_snprintf(p, len, "%s:inherit;", key);
3223 } else {
3224 return g_snprintf(p, len, "%s:%s;", key, val->value);
3225 }
3226 }
3227 return 0;
3228 }
3231 /**
3232 *
3233 */
3234 static bool
3235 sp_length_differ(SPILength const *const a, SPILength const *const b)
3236 {
3237 if (a->unit != b->unit) {
3238 if (a->unit == SP_CSS_UNIT_EM) return true;
3239 if (a->unit == SP_CSS_UNIT_EX) return true;
3240 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3241 if (b->unit == SP_CSS_UNIT_EM) return true;
3242 if (b->unit == SP_CSS_UNIT_EX) return true;
3243 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3244 }
3246 return (a->computed != b->computed);
3247 }
3251 /**
3252 * Write SPILength object into string.
3253 */
3254 static gint
3255 sp_style_write_ilength(gchar *p, gint const len, gchar const *const key,
3256 SPILength const *const val, SPILength const *const base, guint const flags)
3257 {
3258 Inkscape::CSSOStringStream os;
3260 if ((flags & SP_STYLE_FLAG_ALWAYS)
3261 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3262 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3263 && (!base->set || sp_length_differ(val, base))))
3264 {
3265 if (val->inherit) {
3266 return g_snprintf(p, len, "%s:inherit;", key);
3267 } else {
3268 switch (val->unit) {
3269 case SP_CSS_UNIT_NONE:
3270 os << key << ":" << val->computed << ";";
3271 return g_strlcpy(p, os.str().c_str(), len);
3272 break;
3273 case SP_CSS_UNIT_PX:
3274 os << key << ":" << val->computed << "px;";
3275 return g_strlcpy(p, os.str().c_str(), len);
3276 break;
3277 case SP_CSS_UNIT_PT:
3278 os << key << ":" << val->computed * PT_PER_PX << "pt;";
3279 return g_strlcpy(p, os.str().c_str(), len);
3280 break;
3281 case SP_CSS_UNIT_PC:
3282 os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;";
3283 return g_strlcpy(p, os.str().c_str(), len);
3284 break;
3285 case SP_CSS_UNIT_MM:
3286 os << key << ":" << val->computed * MM_PER_PX << "mm;";
3287 return g_strlcpy(p, os.str().c_str(), len);
3288 break;
3289 case SP_CSS_UNIT_CM:
3290 os << key << ":" << val->computed * CM_PER_PX << "cm;";
3291 return g_strlcpy(p, os.str().c_str(), len);
3292 break;
3293 case SP_CSS_UNIT_IN:
3294 os << key << ":" << val->computed * IN_PER_PX << "in;";
3295 return g_strlcpy(p, os.str().c_str(), len);
3296 break;
3297 case SP_CSS_UNIT_EM:
3298 os << key << ":" << val->value << "em;";
3299 return g_strlcpy(p, os.str().c_str(), len);
3300 break;
3301 case SP_CSS_UNIT_EX:
3302 os << key << ":" << val->value << "ex;";
3303 return g_strlcpy(p, os.str().c_str(), len);
3304 break;
3305 case SP_CSS_UNIT_PERCENT:
3306 os << key << ":" << (val->value * 100.0) << "%;";
3307 return g_strlcpy(p, os.str().c_str(), len);
3308 break;
3309 default:
3310 /* Invalid */
3311 break;
3312 }
3313 }
3314 }
3315 return 0;
3316 }
3319 /**
3320 *
3321 */
3322 static bool
3323 sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b)
3324 {
3325 if (a->normal != b->normal) return true;
3326 if (a->normal) return false;
3328 if (a->unit != b->unit) {
3329 if (a->unit == SP_CSS_UNIT_EM) return true;
3330 if (a->unit == SP_CSS_UNIT_EX) return true;
3331 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3332 if (b->unit == SP_CSS_UNIT_EM) return true;
3333 if (b->unit == SP_CSS_UNIT_EX) return true;
3334 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3335 }
3337 return (a->computed != b->computed);
3338 }
3340 /**
3341 * Write SPILengthOrNormal object into string.
3342 */
3343 static gint
3344 sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key,
3345 SPILengthOrNormal const *const val,
3346 SPILengthOrNormal const *const base,
3347 guint const flags)
3348 {
3349 if ((flags & SP_STYLE_FLAG_ALWAYS)
3350 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3351 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3352 && (!base->set || sp_lengthornormal_differ(val, base))))
3353 {
3354 if (val->normal) {
3355 return g_snprintf(p, len, "%s:normal;", key);
3356 } else {
3357 SPILength length;
3358 length.set = val->set;
3359 length.inherit = val->inherit;
3360 length.unit = val->unit;
3361 length.value = val->value;
3362 length.computed = val->computed;
3363 return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS);
3364 }
3365 }
3366 return 0;
3367 }
3369 /**
3370 *
3371 */
3372 static bool
3373 sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b)
3374 {
3375 return a->underline != b->underline
3376 || a->overline != b->overline
3377 || a->line_through != b->line_through
3378 || a->blink != b->blink;
3379 }
3381 /**
3382 * Write SPITextDecoration object into string.
3383 */
3384 static gint
3385 sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key,
3386 SPITextDecoration const *const val,
3387 SPITextDecoration const *const base,
3388 guint const flags)
3389 {
3390 Inkscape::CSSOStringStream os;
3392 if ((flags & SP_STYLE_FLAG_ALWAYS)
3393 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3394 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3395 && (!base->set || sp_textdecoration_differ(val, base))))
3396 {
3397 if (val->inherit) {
3398 return g_snprintf(p, len, "%s:inherit;", key);
3399 } else {
3400 os << key << ":";
3401 if (val->underline || val->overline || val->line_through || val->blink) {
3402 if (val->underline) os << " underline";
3403 if (val->overline) os << " overline";
3404 if (val->line_through) os << " line-through";
3405 if (val->blink) os << " blink";
3406 } else
3407 os << "none";
3408 os << ";";
3409 return g_strlcpy(p, os.str().c_str(), len);
3410 }
3411 }
3412 return 0;
3413 }
3415 /**
3416 *
3417 */
3418 static bool
3419 sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
3420 {
3421 if (a->type != b->type)
3422 return true;
3423 if (a->type == SP_PAINT_TYPE_COLOR)
3424 return !(sp_color_is_equal(&a->value.color, &b->value.color)
3425 && ((a->iccColor == b->iccColor)
3426 || (a->iccColor && b->iccColor
3427 && (a->iccColor->colorProfile == b->iccColor->colorProfile)
3428 && (a->iccColor->colors == b->iccColor->colors))));
3429 /* todo: Allow for epsilon differences in iccColor->colors, e.g. changes small enough not to show up
3430 * in the string representation. */
3431 if (a->type == SP_PAINT_TYPE_PAINTSERVER)
3432 return (a->value.paint.server != b->value.paint.server);
3433 return false;
3434 }
3438 /**
3439 * Write SPIPaint object into string.
3440 */
3441 static gint
3442 sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
3443 SPIPaint const *const paint, SPIPaint const *const base, guint const flags)
3444 {
3445 if ((flags & SP_STYLE_FLAG_ALWAYS)
3446 || ((flags & SP_STYLE_FLAG_IFSET) && paint->set)
3447 || ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set
3448 && (!base->set || sp_paint_differ(paint, base))))
3449 {
3450 if (paint->inherit) {
3451 return g_snprintf(b, len, "%s:inherit;", key);
3452 } else if (paint->currentcolor) {
3453 return g_snprintf(b, len, "%s:currentColor;", key);
3454 } else {
3455 switch (paint->type) {
3456 case SP_PAINT_TYPE_COLOR: {
3457 char color_buf[8];
3458 sp_svg_write_color(color_buf, sizeof(color_buf), sp_color_get_rgba32_ualpha(&paint->value.color, 0));
3459 if (paint->iccColor) {
3460 CSSOStringStream css;
3461 css << color_buf << " icc-color(" << paint->iccColor->colorProfile;
3462 for (vector<double>::const_iterator i(paint->iccColor->colors.begin()),
3463 iEnd(paint->iccColor->colors.end());
3464 i != iEnd; ++i) {
3465 css << ", " << *i;
3466 }
3467 css << ')';
3468 return g_snprintf(b, len, "%s:%s;", key, css.gcharp());
3469 } else {
3470 return g_snprintf(b, len, "%s:%s;", key, color_buf);
3471 }
3472 }
3473 case SP_PAINT_TYPE_PAINTSERVER:
3474 return g_snprintf(b, len, "%s:url(%s);", key, paint->value.paint.uri);
3475 default:
3476 break;
3477 }
3478 return g_snprintf(b, len, "%s:none;", key);
3479 }
3480 }
3481 return 0;
3482 }
3485 /**
3486 *
3487 */
3488 static bool
3489 sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b)
3490 {
3491 if (a->type != b->type)
3492 return true;
3493 if (a->type == SP_FONT_SIZE_LENGTH) {
3494 if (a->computed != b->computed)
3495 return true;
3496 } else {
3497 if (a->value != b->value)
3498 return true;
3499 }
3500 return false;
3501 }
3504 /**
3505 * Write SPIFontSize object into string.
3506 */
3507 static gint
3508 sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key,
3509 SPIFontSize const *const val, SPIFontSize const *const base,
3510 guint const flags)
3511 {
3512 if ((flags & SP_STYLE_FLAG_ALWAYS)
3513 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3514 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3515 && (!base->set || sp_fontsize_differ(val, base))))
3516 {
3517 if (val->inherit) {
3518 return g_snprintf(p, len, "%s:inherit;", key);
3519 } else if (val->type == SP_FONT_SIZE_LITERAL) {
3520 for (unsigned i = 0; enum_font_size[i].key; i++) {
3521 if (enum_font_size[i].value == static_cast< gint > (val->value) ) {
3522 return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key);
3523 }
3524 }
3525 } else if (val->type == SP_FONT_SIZE_LENGTH) {
3526 Inkscape::CSSOStringStream os;
3527 os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
3528 return g_strlcpy(p, os.str().c_str(), len);
3529 } else if (val->type == SP_FONT_SIZE_PERCENTAGE) {
3530 Inkscape::CSSOStringStream os;
3531 os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;";
3532 return g_strlcpy(p, os.str().c_str(), len);
3533 }
3534 }
3535 return 0;
3536 }
3539 /**
3540 * Clear paint object, and disconnect style from paintserver (if present).
3541 */
3542 static void
3543 sp_style_paint_clear(SPStyle *style, SPIPaint *paint)
3544 {
3545 if ((paint->type == SP_PAINT_TYPE_PAINTSERVER) && paint->value.paint.server) {
3546 if (paint == &style->fill) {
3547 if (style->fill_hreffed) {
3548 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3549 style->fill_hreffed = false;
3550 }
3551 if (style->fill_listening) {
3552 g_signal_handlers_disconnect_matched(G_OBJECT(paint->value.paint.server),
3553 G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style);
3554 style->fill_listening = false;
3555 }
3556 } else {
3557 assert(paint == &style->stroke); // Only fill & stroke can have a paint server.
3558 if (style->stroke_hreffed) {
3559 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3560 style->stroke_hreffed = false;
3561 }
3562 if (style->stroke_listening) {
3563 g_signal_handlers_disconnect_matched(G_OBJECT(paint->value.paint.server),
3564 G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style);
3565 style->stroke_listening = false;
3566 }
3567 }
3569 paint->value.paint.server = NULL;
3570 }
3571 paint->value.paint.uri = NULL;
3572 paint->type = SP_PAINT_TYPE_NONE;
3573 delete paint->iccColor;
3574 paint->iccColor = NULL;
3575 }
3577 /**
3578 * Clear all style property attributes in object.
3579 */
3580 void
3581 sp_style_unset_property_attrs(SPObject *o)
3582 {
3583 if (!o) return;
3585 SPStyle *style = SP_OBJECT_STYLE(o);
3586 if (!style) return;
3588 Inkscape::XML::Node *repr = SP_OBJECT_REPR(o);
3589 if (!repr) return;
3591 if (style->opacity.set) {
3592 repr->setAttribute("opacity", NULL);
3593 }
3594 if (style->color.set) {
3595 repr->setAttribute("color", NULL);
3596 }
3597 if (style->fill.set) {
3598 repr->setAttribute("fill", NULL);
3599 }
3600 if (style->fill_opacity.set) {
3601 repr->setAttribute("fill-opacity", NULL);
3602 }
3603 if (style->fill_rule.set) {
3604 repr->setAttribute("fill-rule", NULL);
3605 }
3606 if (style->stroke.set) {
3607 repr->setAttribute("stroke", NULL);
3608 }
3609 if (style->stroke_width.set) {
3610 repr->setAttribute("stroke-width", NULL);
3611 }
3612 if (style->stroke_linecap.set) {
3613 repr->setAttribute("stroke-linecap", NULL);
3614 }
3615 if (style->stroke_linejoin.set) {
3616 repr->setAttribute("stroke-linejoin", NULL);
3617 }
3618 if (style->marker[SP_MARKER_LOC].set) {
3619 repr->setAttribute("marker", NULL);
3620 }
3621 if (style->marker[SP_MARKER_LOC_START].set) {
3622 repr->setAttribute("marker-start", NULL);
3623 }
3624 if (style->marker[SP_MARKER_LOC_MID].set) {
3625 repr->setAttribute("marker-mid", NULL);
3626 }
3627 if (style->marker[SP_MARKER_LOC_END].set) {
3628 repr->setAttribute("marker-end", NULL);
3629 }
3630 if (style->stroke_opacity.set) {
3631 repr->setAttribute("stroke-opacity", NULL);
3632 }
3633 if (style->stroke_dasharray_set) {
3634 repr->setAttribute("stroke-dasharray", NULL);
3635 }
3636 if (style->stroke_dashoffset_set) {
3637 repr->setAttribute("stroke-dashoffset", NULL);
3638 }
3639 if (style->text_private && style->text->font_family.set) {
3640 repr->setAttribute("font-family", NULL);
3641 }
3642 if (style->text_anchor.set) {
3643 repr->setAttribute("text-anchor", NULL);
3644 }
3645 if (style->writing_mode.set) {
3646 repr->setAttribute("writing_mode", NULL);
3647 }
3648 }
3650 /**
3651 * \pre style != NULL.
3652 * \pre flags in {IFSET, ALWAYS}.
3653 */
3654 SPCSSAttr *
3655 sp_css_attr_from_style(SPStyle const *const style, guint const flags)
3656 {
3657 g_return_val_if_fail(style != NULL, NULL);
3658 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3659 (flags == SP_STYLE_FLAG_ALWAYS) ),
3660 NULL);
3661 gchar *style_str = sp_style_write_string(style, flags);
3662 SPCSSAttr *css = sp_repr_css_attr_new();
3663 sp_repr_css_attr_add_from_string(css, style_str);
3664 g_free(style_str);
3665 return css;
3666 }
3669 /**
3670 * \pre object != NULL
3671 * \pre flags in {IFSET, ALWAYS}.
3672 */
3673 SPCSSAttr *
3674 sp_css_attr_from_object(SPObject *object, guint const flags)
3675 {
3676 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3677 (flags == SP_STYLE_FLAG_ALWAYS) ),
3678 NULL);
3679 SPStyle const *const style = SP_OBJECT_STYLE(object);
3680 if (style == NULL)
3681 return NULL;
3682 return sp_css_attr_from_style(style, flags);
3683 }
3685 /**
3686 * Unset any text-related properties
3687 */
3688 SPCSSAttr *
3689 sp_css_attr_unset_text(SPCSSAttr *css)
3690 {
3691 sp_repr_css_set_property(css, "font", NULL); // not implemented yet
3692 sp_repr_css_set_property(css, "font-size", NULL);
3693 sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet
3694 sp_repr_css_set_property(css, "font-style", NULL);
3695 sp_repr_css_set_property(css, "font-variant", NULL);
3696 sp_repr_css_set_property(css, "font-weight", NULL);
3697 sp_repr_css_set_property(css, "font-stretch", NULL);
3698 sp_repr_css_set_property(css, "font-family", NULL);
3699 sp_repr_css_set_property(css, "text-indent", NULL);
3700 sp_repr_css_set_property(css, "text-align", NULL);
3701 sp_repr_css_set_property(css, "text-decoration", NULL);
3702 sp_repr_css_set_property(css, "line-height", NULL);
3703 sp_repr_css_set_property(css, "letter-spacing", NULL);
3704 sp_repr_css_set_property(css, "word-spacing", NULL);
3705 sp_repr_css_set_property(css, "text-transform", NULL);
3706 sp_repr_css_set_property(css, "direction", NULL);
3707 sp_repr_css_set_property(css, "block-progression", NULL);
3708 sp_repr_css_set_property(css, "writing-mode", NULL);
3709 sp_repr_css_set_property(css, "text-anchor", NULL);
3710 sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet
3711 sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet
3712 sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet
3713 sp_repr_css_set_property(css, "baseline-shift", NULL); // not implemented yet
3715 return css;
3716 }
3718 bool
3719 is_url(char const *p)
3720 {
3721 if (p == NULL)
3722 return false;
3723 /** \todo
3724 * FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs
3725 * in property values must start with 'url('.
3726 */
3727 return (g_ascii_strncasecmp(p, "url(", 4) == 0);
3728 }
3730 /**
3731 * Unset any properties that contain URI values.
3732 *
3733 * Used for storing style that will be reused across documents when carrying
3734 * the referenced defs is impractical.
3735 */
3736 SPCSSAttr *
3737 sp_css_attr_unset_uris(SPCSSAttr *css)
3738 {
3739 // All properties that may hold <uri> or <paint> according to SVG 1.1
3740 if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL);
3741 if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL);
3742 if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL);
3743 if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL);
3744 if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL);
3745 if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL);
3746 if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL);
3747 if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL);
3748 if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL);
3749 if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL);
3751 return css;
3752 }
3754 /**
3755 * Scale a single-value property.
3756 */
3757 void
3758 sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property,
3759 double ex, bool only_with_units = false)
3760 {
3761 gchar const *w = sp_repr_css_property(css, property, NULL);
3762 if (w) {
3763 gchar *units = NULL;
3764 double wd = g_ascii_strtod(w, &units) * ex;
3765 if (w == units) {// nothing converted, non-numeric value
3766 return;
3767 }
3768 if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) {
3769 // only_with_units, but no units found, so do nothing.
3770 return;
3771 }
3772 Inkscape::CSSOStringStream os;
3773 os << wd << units; // reattach units
3774 sp_repr_css_set_property(css, property, os.str().c_str());
3775 }
3776 }
3778 /**
3779 * Scale a list-of-values property.
3780 */
3781 void
3782 sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex)
3783 {
3784 gchar const *string = sp_repr_css_property(css, property, NULL);
3785 if (string) {
3786 Inkscape::CSSOStringStream os;
3787 gchar **a = g_strsplit(string, ",", 10000);
3788 bool first = true;
3789 for (gchar **i = a; i != NULL; i++) {
3790 gchar *w = *i;
3791 if (w == NULL)
3792 break;
3793 gchar *units = NULL;
3794 double wd = g_ascii_strtod(w, &units) * ex;
3795 if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing
3796 g_strfreev(a);
3797 return;
3798 }
3799 if (!first) {
3800 os << ",";
3801 }
3802 os << wd << units; // reattach units
3803 first = false;
3804 }
3805 sp_repr_css_set_property(css, property, os.str().c_str());
3806 g_strfreev(a);
3807 }
3808 }
3810 /**
3811 * Scale any properties that may hold <length> by ex.
3812 */
3813 SPCSSAttr *
3814 sp_css_attr_scale(SPCSSAttr *css, double ex)
3815 {
3816 sp_css_attr_scale_property_single(css, "baseline-shift", ex);
3817 sp_css_attr_scale_property_single(css, "stroke-width", ex);
3818 sp_css_attr_scale_property_list (css, "stroke-dasharray", ex);
3819 sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex);
3820 sp_css_attr_scale_property_single(css, "font-size", ex);
3821 sp_css_attr_scale_property_single(css, "kerning", ex);
3822 sp_css_attr_scale_property_single(css, "letter-spacing", ex);
3823 sp_css_attr_scale_property_single(css, "word-spacing", ex);
3824 sp_css_attr_scale_property_single(css, "line-height", ex, true);
3826 return css;
3827 }
3830 /**
3831 * Remove quotes from SPIString object value.
3832 *
3833 * \todo FIXME: now used for font family, but perhaps this should apply to
3834 * ALL strings (check CSS spec), in which case this should be part of
3835 * read_istring.
3836 */
3837 static void
3838 css2_unescape_unquote(SPIString *val)
3839 {
3840 if (val->set && val->value && strlen(val->value) >= 2) {
3842 /// \todo unescape all \-escaped chars
3844 int l = strlen(val->value);
3845 if ( ( val->value[0] == '"' && val->value[l - 1] == '"' ) ||
3846 ( val->value[0] == '\'' && val->value[l - 1] == '\'' ) ) {
3847 memcpy(val->value, val->value + 1, l - 2);
3848 val->value[l - 2] = '\0';
3849 }
3850 }
3851 }
3854 /*
3855 Local Variables:
3856 mode:c++
3857 c-file-style:"stroustrup"
3858 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
3859 indent-tabs-mode:nil
3860 fill-column:99
3861 End:
3862 */
3863 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :