e0d6532d451a760b72f6b91e0f389e076e59ad28
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 #include <sigc++/functors/ptr_fun.h>
45 #include <sigc++/adaptors/bind.h>
47 using Inkscape::CSSOStringStream;
48 using std::vector;
50 namespace Inkscape {
52 /**
53 * Parses a CSS url() specification; temporary hack until
54 * style stuff is redone.
55 * \param string the CSS string to parse
56 * \return a newly-allocated URL string (or NULL); free with g_free()
57 */
58 gchar *parse_css_url(gchar const *string) {
59 if (!string)
60 return NULL;
62 gchar const *iter = string;
63 for ( ; g_ascii_isspace(*iter) ; iter = g_utf8_next_char(iter) );
64 if (strncmp(iter, "url(", 4))
65 return NULL;
66 iter += 4;
68 gchar const end_char = *iter;
69 if ( *iter == '"' || *iter == '\'' ) {
70 iter += 1;
71 }
73 GString *temp = g_string_new(NULL);
74 for ( ; *iter ; iter = g_utf8_next_char(iter) ) {
75 if ( *iter == '(' || *iter == ')' ||
76 *iter == '"' || *iter == '\'' ||
77 g_ascii_isspace(*iter) ||
78 g_ascii_iscntrl(*iter) )
79 {
80 break;
81 }
82 if ( *iter == '\\' ) {
83 iter = g_utf8_next_char(iter);
84 }
85 if ( *iter & (gchar)0x80 ) {
86 break;
87 } else {
88 g_string_append_c(temp, *iter);
89 }
90 }
92 if ( *iter == end_char && end_char != ')' ) {
93 iter = g_utf8_next_char(iter);
94 }
95 gchar *result;
96 if ( *iter == ')' ) {
97 result = temp->str;
98 g_string_free(temp, FALSE);
99 } else {
100 result = NULL;
101 g_string_free(temp, TRUE);
102 }
104 return result;
105 }
107 }
109 #define BMAX 8192
111 class SPStyleEnum;
113 /*#########################
114 ## FORWARD DECLARATIONS
115 #########################*/
116 static void sp_style_clear(SPStyle *style);
118 static void sp_style_merge_property(SPStyle *style, gint id, gchar const *val);
120 static void sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent);
121 static void sp_style_merge_ifilter(SPIFilter *child, SPIFilter const *parent);
122 static void sp_style_read_dash(SPStyle *style, gchar const *str);
124 static SPTextStyle *sp_text_style_new(void);
125 static void sp_text_style_clear(SPTextStyle *ts);
126 static SPTextStyle *sp_text_style_unref(SPTextStyle *st);
127 static SPTextStyle *sp_text_style_duplicate_unset(SPTextStyle *st);
128 static guint sp_text_style_write(gchar *p, guint len, SPTextStyle const *st, guint flags = SP_STYLE_FLAG_IFSET);
129 static void sp_style_privatize_text(SPStyle *style);
131 static void sp_style_read_ifloat(SPIFloat *val, gchar const *str);
132 static void sp_style_read_iscale24(SPIScale24 *val, gchar const *str);
133 static void sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict, bool can_explicitly_inherit);
134 static void sp_style_read_istring(SPIString *val, gchar const *str);
135 static void sp_style_read_ilength(SPILength *val, gchar const *str);
136 static void sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str);
137 static void sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str);
138 static void sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
139 static void sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document);
140 static void sp_style_read_ifontsize(SPIFontSize *val, gchar const *str);
141 static void sp_style_read_ifilter(SPIFilter *f, gchar const *str, SPDocument *document);
143 static void sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr, gchar const *key, SPStyleEnum const *dict, bool can_explicitly_inherit);
144 static void sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key);
145 static void sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key);
146 static void sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key);
148 static gint sp_style_write_ifloat(gchar *p, gint len, gchar const *key, SPIFloat const *val, SPIFloat const *base, guint flags);
149 static gint sp_style_write_iscale24(gchar *p, gint len, gchar const *key, SPIScale24 const *val, SPIScale24 const *base, guint flags);
150 static gint sp_style_write_ienum(gchar *p, gint len, gchar const *key, SPStyleEnum const *dict, SPIEnum const *val, SPIEnum const *base, guint flags);
151 static gint sp_style_write_istring(gchar *p, gint len, gchar const *key, SPIString const *val, SPIString const *base, guint flags);
152 static gint sp_style_write_ilength(gchar *p, gint len, gchar const *key, SPILength const *val, SPILength const *base, guint flags);
153 static gint sp_style_write_ipaint(gchar *b, gint len, gchar const *key, SPIPaint const *paint, SPIPaint const *base, guint flags);
154 static gint sp_style_write_ifontsize(gchar *p, gint len, gchar const *key, SPIFontSize const *val, SPIFontSize const *base, guint flags);
155 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);
156 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);
157 static gint sp_style_write_ifilter(gchar *b, gint len, gchar const *key, SPIFilter const *filter, SPIFilter const *base, guint flags);
159 static void css2_unescape_unquote(SPIString *val);
161 static void sp_style_paint_clear(SPStyle *style, SPIPaint *paint);
163 #define SPS_READ_IENUM_IF_UNSET(v,s,d,i) if (!(v)->set) {sp_style_read_ienum((v), (s), (d), (i));}
164 #define SPS_READ_PENUM_IF_UNSET(v,r,k,d,i) if (!(v)->set) {sp_style_read_penum((v), (r), (k), (d), (i));}
166 #define SPS_READ_ILENGTH_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ilength((v), (s));}
167 #define SPS_READ_PLENGTH_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_plength((v), (r), (k));}
169 #define SPS_READ_PFLOAT_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfloat((v), (r), (k));}
171 #define SPS_READ_IFONTSIZE_IF_UNSET(v,s) if (!(v)->set) {sp_style_read_ifontsize((v), (s));}
172 #define SPS_READ_PFONTSIZE_IF_UNSET(v,r,k) if (!(v)->set) {sp_style_read_pfontsize((v), (r), (k));}
174 static void sp_style_merge_from_object_stylesheet(SPStyle *, SPObject const *);
176 struct SPStyleEnum {
177 gchar const *key;
178 gint value;
179 };
181 static SPStyleEnum const enum_fill_rule[] = {
182 {"nonzero", SP_WIND_RULE_NONZERO},
183 {"evenodd", SP_WIND_RULE_EVENODD},
184 {NULL, -1}
185 };
187 static SPStyleEnum const enum_stroke_linecap[] = {
188 {"butt", SP_STROKE_LINECAP_BUTT},
189 {"round", SP_STROKE_LINECAP_ROUND},
190 {"square", SP_STROKE_LINECAP_SQUARE},
191 {NULL, -1}
192 };
194 static SPStyleEnum const enum_stroke_linejoin[] = {
195 {"miter", SP_STROKE_LINEJOIN_MITER},
196 {"round", SP_STROKE_LINEJOIN_ROUND},
197 {"bevel", SP_STROKE_LINEJOIN_BEVEL},
198 {NULL, -1}
199 };
201 static SPStyleEnum const enum_font_style[] = {
202 {"normal", SP_CSS_FONT_STYLE_NORMAL},
203 {"italic", SP_CSS_FONT_STYLE_ITALIC},
204 {"oblique", SP_CSS_FONT_STYLE_OBLIQUE},
205 {NULL, -1}
206 };
208 static SPStyleEnum const enum_font_size[] = {
209 {"xx-small", SP_CSS_FONT_SIZE_XX_SMALL},
210 {"x-small", SP_CSS_FONT_SIZE_X_SMALL},
211 {"small", SP_CSS_FONT_SIZE_SMALL},
212 {"medium", SP_CSS_FONT_SIZE_MEDIUM},
213 {"large", SP_CSS_FONT_SIZE_LARGE},
214 {"x-large", SP_CSS_FONT_SIZE_X_LARGE},
215 {"xx-large", SP_CSS_FONT_SIZE_XX_LARGE},
216 {"smaller", SP_CSS_FONT_SIZE_SMALLER},
217 {"larger", SP_CSS_FONT_SIZE_LARGER},
218 {NULL, -1}
219 };
221 static SPStyleEnum const enum_font_variant[] = {
222 {"normal", SP_CSS_FONT_VARIANT_NORMAL},
223 {"small-caps", SP_CSS_FONT_VARIANT_SMALL_CAPS},
224 {NULL, -1}
225 };
227 static SPStyleEnum const enum_font_weight[] = {
228 {"100", SP_CSS_FONT_WEIGHT_100},
229 {"200", SP_CSS_FONT_WEIGHT_200},
230 {"300", SP_CSS_FONT_WEIGHT_300},
231 {"400", SP_CSS_FONT_WEIGHT_400},
232 {"500", SP_CSS_FONT_WEIGHT_500},
233 {"600", SP_CSS_FONT_WEIGHT_600},
234 {"700", SP_CSS_FONT_WEIGHT_700},
235 {"800", SP_CSS_FONT_WEIGHT_800},
236 {"900", SP_CSS_FONT_WEIGHT_900},
237 {"normal", SP_CSS_FONT_WEIGHT_NORMAL},
238 {"bold", SP_CSS_FONT_WEIGHT_BOLD},
239 {"lighter", SP_CSS_FONT_WEIGHT_LIGHTER},
240 {"bolder", SP_CSS_FONT_WEIGHT_BOLDER},
241 {NULL, -1}
242 };
244 static SPStyleEnum const enum_font_stretch[] = {
245 {"ultra-condensed", SP_CSS_FONT_STRETCH_ULTRA_CONDENSED},
246 {"extra-condensed", SP_CSS_FONT_STRETCH_EXTRA_CONDENSED},
247 {"condensed", SP_CSS_FONT_STRETCH_CONDENSED},
248 {"semi-condensed", SP_CSS_FONT_STRETCH_SEMI_CONDENSED},
249 {"normal", SP_CSS_FONT_STRETCH_NORMAL},
250 {"semi-expanded", SP_CSS_FONT_STRETCH_SEMI_EXPANDED},
251 {"expanded", SP_CSS_FONT_STRETCH_EXPANDED},
252 {"extra-expanded", SP_CSS_FONT_STRETCH_EXTRA_EXPANDED},
253 {"ultra-expanded", SP_CSS_FONT_STRETCH_ULTRA_EXPANDED},
254 {"narrower", SP_CSS_FONT_STRETCH_NARROWER},
255 {"wider", SP_CSS_FONT_STRETCH_WIDER},
256 {NULL, -1}
257 };
259 static SPStyleEnum const enum_text_align[] = {
260 {"start", SP_CSS_TEXT_ALIGN_START},
261 {"end", SP_CSS_TEXT_ALIGN_END},
262 {"left", SP_CSS_TEXT_ALIGN_LEFT},
263 {"right", SP_CSS_TEXT_ALIGN_RIGHT},
264 {"center", SP_CSS_TEXT_ALIGN_CENTER},
265 {"justify", SP_CSS_TEXT_ALIGN_JUSTIFY},
266 {NULL, -1}
267 };
269 static SPStyleEnum const enum_text_transform[] = {
270 {"capitalize", SP_CSS_TEXT_TRANSFORM_CAPITALIZE},
271 {"uppercase", SP_CSS_TEXT_TRANSFORM_UPPERCASE},
272 {"lowercase", SP_CSS_TEXT_TRANSFORM_LOWERCASE},
273 {"none", SP_CSS_TEXT_TRANSFORM_NONE},
274 {NULL, -1}
275 };
277 static SPStyleEnum const enum_text_anchor[] = {
278 {"start", SP_CSS_TEXT_ANCHOR_START},
279 {"middle", SP_CSS_TEXT_ANCHOR_MIDDLE},
280 {"end", SP_CSS_TEXT_ANCHOR_END},
281 {NULL, -1}
282 };
284 static SPStyleEnum const enum_direction[] = {
285 {"ltr", SP_CSS_DIRECTION_LTR},
286 {"rtl", SP_CSS_DIRECTION_RTL},
287 {NULL, -1}
288 };
290 static SPStyleEnum const enum_block_progression[] = {
291 {"tb", SP_CSS_BLOCK_PROGRESSION_TB},
292 {"rl", SP_CSS_BLOCK_PROGRESSION_RL},
293 {"lr", SP_CSS_BLOCK_PROGRESSION_LR},
294 {NULL, -1}
295 };
297 static SPStyleEnum const enum_writing_mode[] = {
298 /* Note that using the same enumerator for lr as lr-tb means we write as lr-tb even if the
299 * input file said lr. We prefer writing lr-tb on the grounds that the spec says the initial
300 * value is lr-tb rather than lr.
301 *
302 * ECMA scripts may be surprised to find tb-rl in DOM if they set the attribute to rl, so
303 * sharing enumerators for different strings may be a bug (once we support ecma script).
304 */
305 {"lr-tb", SP_CSS_WRITING_MODE_LR_TB},
306 {"rl-tb", SP_CSS_WRITING_MODE_RL_TB},
307 {"tb-rl", SP_CSS_WRITING_MODE_TB_RL},
308 {"lr", SP_CSS_WRITING_MODE_LR_TB},
309 {"rl", SP_CSS_WRITING_MODE_RL_TB},
310 {"tb", SP_CSS_WRITING_MODE_TB_RL},
311 {NULL, -1}
312 };
314 static SPStyleEnum const enum_visibility[] = {
315 {"hidden", SP_CSS_VISIBILITY_HIDDEN},
316 {"collapse", SP_CSS_VISIBILITY_COLLAPSE},
317 {"visible", SP_CSS_VISIBILITY_VISIBLE},
318 {NULL, -1}
319 };
321 static SPStyleEnum const enum_overflow[] = {
322 {"visible", SP_CSS_OVERFLOW_VISIBLE},
323 {"hidden", SP_CSS_OVERFLOW_HIDDEN},
324 {"scroll", SP_CSS_OVERFLOW_SCROLL},
325 {"auto", SP_CSS_OVERFLOW_AUTO},
326 {NULL, -1}
327 };
329 static SPStyleEnum const enum_display[] = {
330 {"none", SP_CSS_DISPLAY_NONE},
331 {"inline", SP_CSS_DISPLAY_INLINE},
332 {"block", SP_CSS_DISPLAY_BLOCK},
333 {"list-item", SP_CSS_DISPLAY_LIST_ITEM},
334 {"run-in", SP_CSS_DISPLAY_RUN_IN},
335 {"compact", SP_CSS_DISPLAY_COMPACT},
336 {"marker", SP_CSS_DISPLAY_MARKER},
337 {"table", SP_CSS_DISPLAY_TABLE},
338 {"inline-table", SP_CSS_DISPLAY_INLINE_TABLE},
339 {"table-row-group", SP_CSS_DISPLAY_TABLE_ROW_GROUP},
340 {"table-header-group", SP_CSS_DISPLAY_TABLE_HEADER_GROUP},
341 {"table-footer-group", SP_CSS_DISPLAY_TABLE_FOOTER_GROUP},
342 {"table-row", SP_CSS_DISPLAY_TABLE_ROW},
343 {"table-column-group", SP_CSS_DISPLAY_TABLE_COLUMN_GROUP},
344 {"table-column", SP_CSS_DISPLAY_TABLE_COLUMN},
345 {"table-cell", SP_CSS_DISPLAY_TABLE_CELL},
346 {"table-caption", SP_CSS_DISPLAY_TABLE_CAPTION},
347 {NULL, -1}
348 };
350 static SPStyleEnum const enum_shape_rendering[] = {
351 {"auto", 0},
352 {"optimizeSpeed", 0},
353 {"crispEdges", 0},
354 {"geometricPrecision", 0},
355 {NULL, -1}
356 };
358 static SPStyleEnum const enum_color_rendering[] = {
359 {"auto", 0},
360 {"optimizeSpeed", 0},
361 {"optimizeQuality", 0},
362 {NULL, -1}
363 };
365 static SPStyleEnum const *const enum_image_rendering = enum_color_rendering;
367 static SPStyleEnum const enum_text_rendering[] = {
368 {"auto", 0},
369 {"optimizeSpeed", 0},
370 {"optimizeLegibility", 0},
371 {"geometricPrecision", 0},
372 {NULL, -1}
373 };
375 /**
376 * Release callback.
377 */
378 static void
379 sp_style_object_release(SPObject *object, SPStyle *style)
380 {
381 style->object = NULL;
382 }
387 /**
388 * Returns a new SPStyle object with settings as per sp_style_clear().
389 */
390 SPStyle *
391 sp_style_new()
392 {
393 SPStyle *const style = g_new0(SPStyle, 1);
395 style->refcount = 1;
396 style->object = NULL;
397 style->text = sp_text_style_new();
398 style->text_private = TRUE;
400 sp_style_clear(style);
402 style->cloned = false;
404 style->fill_hreffed = false;
405 style->stroke_hreffed = false;
407 new (&style->fill_release_connection) sigc::connection();
408 new (&style->fill_modified_connection) sigc::connection();
410 new (&style->stroke_release_connection) sigc::connection();
411 new (&style->stroke_modified_connection) sigc::connection();
413 return style;
414 }
417 /**
418 * Creates a new SPStyle object, and attaches it to the specified SPObject.
419 */
420 SPStyle *
421 sp_style_new_from_object(SPObject *object)
422 {
423 g_return_val_if_fail(object != NULL, NULL);
424 g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
426 SPStyle *style = sp_style_new();
427 style->object = object;
428 g_signal_connect(G_OBJECT(object), "release", G_CALLBACK(sp_style_object_release), style);
430 if (object && SP_OBJECT_IS_CLONED(object)) {
431 style->cloned = true;
432 }
434 return style;
435 }
438 /**
439 * Increase refcount of style.
440 */
441 SPStyle *
442 sp_style_ref(SPStyle *style)
443 {
444 g_return_val_if_fail(style != NULL, NULL);
445 g_return_val_if_fail(style->refcount > 0, NULL);
447 style->refcount += 1;
449 return style;
450 }
453 /**
454 * Decrease refcount of style with possible destruction.
455 */
456 SPStyle *
457 sp_style_unref(SPStyle *style)
458 {
459 g_return_val_if_fail(style != NULL, NULL);
460 g_return_val_if_fail(style->refcount > 0, NULL);
462 style->refcount -= 1;
464 if (style->refcount < 1) {
465 if (style->object)
466 g_signal_handlers_disconnect_matched(G_OBJECT(style->object),
467 G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, style);
468 if (style->text) sp_text_style_unref(style->text);
469 sp_style_paint_clear(style, &style->fill);
470 sp_style_paint_clear(style, &style->stroke);
471 style->fill_release_connection.disconnect();
472 style->fill_release_connection.~connection();
473 style->fill_modified_connection.disconnect();
474 style->fill_modified_connection.~connection();
475 style->stroke_release_connection.disconnect();
476 style->stroke_release_connection.~connection();
477 style->stroke_modified_connection.disconnect();
478 style->stroke_modified_connection.~connection();
479 g_free(style->stroke_dash.dash);
480 g_free(style);
481 }
483 return NULL;
484 }
486 /**
487 * Reads the various style parameters for an object from repr.
488 */
489 static void
490 sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
491 {
492 g_assert(style != NULL);
493 g_assert(repr != NULL);
494 g_assert(!object || (SP_OBJECT_REPR(object) == repr));
496 sp_style_clear(style);
498 if (object && SP_OBJECT_IS_CLONED(object)) {
499 style->cloned = true;
500 }
502 /* 1. Style itself */
503 gchar const *val = repr->attribute("style");
504 if (val != NULL) {
505 sp_style_merge_from_style_string(style, val);
506 }
508 if (object) {
509 sp_style_merge_from_object_stylesheet(style, object);
510 } else {
511 /** \todo No stylesheet information. Find out under what circumstances
512 * this occurs, and handle accordingly. (If we really wanted to, we
513 * could probably get stylesheets by going through repr->doc.)
514 */
515 }
517 /* 2. Presentation attributes */
518 /* CSS2 */
519 SPS_READ_PENUM_IF_UNSET(&style->visibility, repr, "visibility", enum_visibility, true);
520 SPS_READ_PENUM_IF_UNSET(&style->display, repr, "display", enum_display, true);
521 SPS_READ_PENUM_IF_UNSET(&style->overflow, repr, "overflow", enum_overflow, true);
522 /* Font */
523 SPS_READ_PFONTSIZE_IF_UNSET(&style->font_size, repr, "font-size");
524 SPS_READ_PENUM_IF_UNSET(&style->font_style, repr, "font-style", enum_font_style, true);
525 SPS_READ_PENUM_IF_UNSET(&style->font_variant, repr, "font-variant", enum_font_variant, true);
526 SPS_READ_PENUM_IF_UNSET(&style->font_weight, repr, "font-weight", enum_font_weight, true);
527 SPS_READ_PENUM_IF_UNSET(&style->font_stretch, repr, "font-stretch", enum_font_stretch, true);
528 /* Text (css2 chapter 16) */
529 SPS_READ_PLENGTH_IF_UNSET(&style->text_indent, repr, "text-indent");
530 SPS_READ_PENUM_IF_UNSET(&style->text_align, repr, "text-align", enum_text_align, true);
531 if (!style->text_decoration.set) {
532 val = repr->attribute("text-decoration");
533 if (val) {
534 sp_style_read_itextdecoration(&style->text_decoration, val);
535 }
536 }
537 if (!style->line_height.set) {
538 val = repr->attribute("line-height");
539 if (val) {
540 sp_style_read_ilengthornormal(&style->line_height, val);
541 }
542 }
543 if (!style->letter_spacing.set) {
544 val = repr->attribute("letter-spacing");
545 if (val) {
546 sp_style_read_ilengthornormal(&style->letter_spacing, val);
547 }
548 }
549 if (!style->word_spacing.set) {
550 val = repr->attribute("word-spacing");
551 if (val) {
552 sp_style_read_ilengthornormal(&style->word_spacing, val);
553 }
554 }
555 SPS_READ_PENUM_IF_UNSET(&style->text_transform, repr, "text-transform", enum_text_transform, true);
556 SPS_READ_PENUM_IF_UNSET(&style->direction, repr, "direction", enum_direction, true);
557 SPS_READ_PENUM_IF_UNSET(&style->block_progression, repr, "block_progression", enum_block_progression, true);
559 /* SVG */
560 SPS_READ_PENUM_IF_UNSET(&style->writing_mode, repr, "writing-mode",
561 enum_writing_mode, true);
562 SPS_READ_PENUM_IF_UNSET(&style->text_anchor, repr, "text-anchor",
563 enum_text_anchor, true);
565 /* opacity */
566 if (!style->opacity.set) {
567 val = repr->attribute("opacity");
568 if (val) {
569 sp_style_read_iscale24(&style->opacity, val);
570 }
571 }
572 /* color */
573 if (!style->color.set) {
574 val = repr->attribute("color");
575 if (val) {
576 sp_style_read_icolor(&style->color, val, style, ( object
577 ? SP_OBJECT_DOCUMENT(object)
578 : NULL ));
579 }
580 }
581 /* fill */
582 if (!style->fill.set) {
583 val = repr->attribute("fill");
584 if (val) {
585 sp_style_read_ipaint(&style->fill, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
586 }
587 }
588 /* fill-opacity */
589 if (!style->fill_opacity.set) {
590 val = repr->attribute("fill-opacity");
591 if (val) {
592 sp_style_read_iscale24(&style->fill_opacity, val);
593 }
594 }
595 /* fill-rule */
596 SPS_READ_PENUM_IF_UNSET(&style->fill_rule, repr, "fill-rule", enum_fill_rule, true);
597 /* stroke */
598 if (!style->stroke.set) {
599 val = repr->attribute("stroke");
600 if (val) {
601 sp_style_read_ipaint(&style->stroke, val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
602 }
603 }
604 SPS_READ_PLENGTH_IF_UNSET(&style->stroke_width, repr, "stroke-width");
605 SPS_READ_PENUM_IF_UNSET(&style->stroke_linecap, repr, "stroke-linecap", enum_stroke_linecap, true);
606 SPS_READ_PENUM_IF_UNSET(&style->stroke_linejoin, repr, "stroke-linejoin", enum_stroke_linejoin, true);
607 SPS_READ_PFLOAT_IF_UNSET(&style->stroke_miterlimit, repr, "stroke-miterlimit");
609 /* markers */
610 if (!style->marker[SP_MARKER_LOC].set) {
611 val = repr->attribute("marker");
612 if (val) {
613 sp_style_read_istring(&style->marker[SP_MARKER_LOC], val);
614 }
615 }
616 if (!style->marker[SP_MARKER_LOC_START].set) {
617 val = repr->attribute("marker-start");
618 if (val) {
619 sp_style_read_istring(&style->marker[SP_MARKER_LOC_START], val);
620 }
621 }
622 if (!style->marker[SP_MARKER_LOC_MID].set) {
623 val = repr->attribute("marker-mid");
624 if (val) {
625 sp_style_read_istring(&style->marker[SP_MARKER_LOC_MID], val);
626 }
627 }
628 if (!style->marker[SP_MARKER_LOC_END].set) {
629 val = repr->attribute("marker-end");
630 if (val) {
631 sp_style_read_istring(&style->marker[SP_MARKER_LOC_END], val);
632 }
633 }
635 /* stroke-opacity */
636 if (!style->stroke_opacity.set) {
637 val = repr->attribute("stroke-opacity");
638 if (val) {
639 sp_style_read_iscale24(&style->stroke_opacity, val);
640 }
641 }
642 if (!style->stroke_dasharray_set) {
643 val = repr->attribute("stroke-dasharray");
644 if (val) {
645 sp_style_read_dash(style, val);
646 }
647 }
648 if (!style->stroke_dashoffset_set) {
649 /* fixme */
650 val = repr->attribute("stroke-dashoffset");
651 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
652 style->stroke_dashoffset_set = TRUE;
653 } else {
654 style->stroke_dashoffset_set = FALSE;
655 }
656 }
658 /* font-family */
659 if (!style->text_private || !style->text->font_family.set) {
660 val = repr->attribute("font-family");
661 if (val) {
662 if (!style->text_private) sp_style_privatize_text(style);
663 sp_style_read_istring(&style->text->font_family, val);
664 css2_unescape_unquote(&style->text->font_family);
665 }
666 }
668 /* filter effects */
669 if (!style->filter.set) {
670 val = repr->attribute("filter");
671 if (val) {
672 sp_style_read_ifilter(&style->filter, val, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
673 }
674 }
676 /* 3. Merge from parent */
677 if (object) {
678 if (object->parent) {
679 sp_style_merge_from_parent(style, SP_OBJECT_STYLE(object->parent));
680 }
681 } else {
682 if (sp_repr_parent(repr)) {
683 /// \todo fixme: This is not the prettiest thing (Lauris)
684 SPStyle *parent = sp_style_new();
685 sp_style_read(parent, NULL, sp_repr_parent(repr));
686 sp_style_merge_from_parent(style, parent);
687 sp_style_unref(parent);
688 }
689 }
690 }
693 /**
694 * Read style properties from object's repr.
695 *
696 * 1. Reset existing object style
697 * 2. Load current effective object style
698 * 3. Load i attributes from immediate parent (which has to be up-to-date)
699 */
700 void
701 sp_style_read_from_object(SPStyle *style, SPObject *object)
702 {
703 g_return_if_fail(style != NULL);
704 g_return_if_fail(object != NULL);
705 g_return_if_fail(SP_IS_OBJECT(object));
707 Inkscape::XML::Node *repr = SP_OBJECT_REPR(object);
708 g_return_if_fail(repr != NULL);
710 sp_style_read(style, object, repr);
711 }
714 /**
715 * Read style properties from repr only.
716 */
717 void
718 sp_style_read_from_repr(SPStyle *style, Inkscape::XML::Node *repr)
719 {
720 g_return_if_fail(style != NULL);
721 g_return_if_fail(repr != NULL);
723 sp_style_read(style, NULL, repr);
724 }
728 /**
729 *
730 */
731 static void
732 sp_style_privatize_text(SPStyle *style)
733 {
734 SPTextStyle *text = style->text;
735 style->text = sp_text_style_duplicate_unset(style->text);
736 sp_text_style_unref(text);
737 style->text_private = TRUE;
738 }
741 /**
742 * Merge property into style.
743 *
744 * Should be called in order of highest to lowest precedence.
745 * E.g. for a single style string, call from the last declaration to the first,
746 * as CSS says that later declarations override earlier ones.
747 *
748 * \pre val != NULL.
749 */
750 static void
751 sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
752 {
753 g_return_if_fail(val != NULL);
755 switch (id) {
756 /* CSS2 */
757 /* Font */
758 case SP_PROP_FONT_FAMILY:
759 if (!style->text_private) sp_style_privatize_text(style);
760 if (!style->text->font_family.set) {
761 sp_style_read_istring(&style->text->font_family, val);
762 css2_unescape_unquote(&style->text->font_family);
763 }
764 break;
765 case SP_PROP_FONT_SIZE:
766 SPS_READ_IFONTSIZE_IF_UNSET(&style->font_size, val);
767 break;
768 case SP_PROP_FONT_SIZE_ADJUST:
769 if (strcmp(val, "none") != 0) {
770 g_warning("Unimplemented style property id SP_PROP_FONT_SIZE_ADJUST: value: %s", val);
771 }
772 break;
773 case SP_PROP_FONT_STYLE:
774 SPS_READ_IENUM_IF_UNSET(&style->font_style, val, enum_font_style, true);
775 break;
776 case SP_PROP_FONT_VARIANT:
777 SPS_READ_IENUM_IF_UNSET(&style->font_variant, val, enum_font_variant, true);
778 break;
779 case SP_PROP_FONT_WEIGHT:
780 SPS_READ_IENUM_IF_UNSET(&style->font_weight, val, enum_font_weight, true);
781 break;
782 case SP_PROP_FONT_STRETCH:
783 SPS_READ_IENUM_IF_UNSET(&style->font_stretch, val, enum_font_stretch, true);
784 break;
785 case SP_PROP_FONT:
786 if (!style->text_private) sp_style_privatize_text(style);
787 if (!style->text->font.set) {
788 g_free(style->text->font.value);
789 style->text->font.value = g_strdup(val);
790 style->text->font.set = TRUE;
791 style->text->font.inherit = (val && !strcmp(val, "inherit"));
792 }
793 break;
794 /* Text */
795 case SP_PROP_TEXT_INDENT:
796 SPS_READ_ILENGTH_IF_UNSET(&style->text_indent, val);
797 break;
798 case SP_PROP_TEXT_ALIGN:
799 SPS_READ_IENUM_IF_UNSET(&style->text_align, val, enum_text_align, true);
800 break;
801 case SP_PROP_TEXT_DECORATION:
802 if (!style->text_decoration.set) {
803 sp_style_read_itextdecoration(&style->text_decoration, val);
804 }
805 break;
806 case SP_PROP_LINE_HEIGHT:
807 if (!style->line_height.set) {
808 sp_style_read_ilengthornormal(&style->line_height, val);
809 }
810 break;
811 case SP_PROP_LETTER_SPACING:
812 if (!style->letter_spacing.set) {
813 sp_style_read_ilengthornormal(&style->letter_spacing, val);
814 }
815 break;
816 case SP_PROP_WORD_SPACING:
817 if (!style->word_spacing.set) {
818 sp_style_read_ilengthornormal(&style->word_spacing, val);
819 }
820 break;
821 case SP_PROP_TEXT_TRANSFORM:
822 SPS_READ_IENUM_IF_UNSET(&style->text_transform, val, enum_text_transform, true);
823 break;
824 /* Text (css3) */
825 case SP_PROP_DIRECTION:
826 SPS_READ_IENUM_IF_UNSET(&style->direction, val, enum_direction, true);
827 break;
828 case SP_PROP_BLOCK_PROGRESSION:
829 SPS_READ_IENUM_IF_UNSET(&style->block_progression, val, enum_block_progression, true);
830 break;
831 case SP_PROP_WRITING_MODE:
832 SPS_READ_IENUM_IF_UNSET(&style->writing_mode, val, enum_writing_mode, true);
833 break;
834 case SP_PROP_TEXT_ANCHOR:
835 SPS_READ_IENUM_IF_UNSET(&style->text_anchor, val, enum_text_anchor, true);
836 break;
837 /* Text (unimplemented) */
838 case SP_PROP_TEXT_RENDERING: {
839 /* Ignore the hint. */
840 SPIEnum dummy;
841 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_text_rendering, true);
842 break;
843 }
844 case SP_PROP_ALIGNMENT_BASELINE:
845 g_warning("Unimplemented style property SP_PROP_ALIGNMENT_BASELINE: value: %s", val);
846 break;
847 case SP_PROP_BASELINE_SHIFT:
848 g_warning("Unimplemented style property SP_PROP_BASELINE_SHIFT: value: %s", val);
849 break;
850 case SP_PROP_DOMINANT_BASELINE:
851 g_warning("Unimplemented style property SP_PROP_DOMINANT_BASELINE: value: %s", val);
852 break;
853 case SP_PROP_GLYPH_ORIENTATION_HORIZONTAL:
854 g_warning("Unimplemented style property SP_PROP_ORIENTATION_HORIZONTAL: value: %s", val);
855 break;
856 case SP_PROP_GLYPH_ORIENTATION_VERTICAL:
857 g_warning("Unimplemented style property SP_PROP_ORIENTATION_VERTICAL: value: %s", val);
858 break;
859 case SP_PROP_KERNING:
860 g_warning("Unimplemented style property SP_PROP_KERNING: value: %s", val);
861 break;
862 /* Misc */
863 case SP_PROP_CLIP:
864 g_warning("Unimplemented style property SP_PROP_CLIP: value: %s", val);
865 break;
866 case SP_PROP_COLOR:
867 if (!style->color.set) {
868 sp_style_read_icolor(&style->color, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
869 }
870 break;
871 case SP_PROP_CURSOR:
872 g_warning("Unimplemented style property SP_PROP_CURSOR: value: %s", val);
873 break;
874 case SP_PROP_DISPLAY:
875 SPS_READ_IENUM_IF_UNSET(&style->display, val, enum_display, true);
876 break;
877 case SP_PROP_OVERFLOW:
878 /** \todo
879 * FIXME: not supported properly yet, we just read and write it,
880 * but act as if it is always "display".
881 */
882 SPS_READ_IENUM_IF_UNSET(&style->overflow, val, enum_overflow, true);
883 break;
884 case SP_PROP_VISIBILITY:
885 SPS_READ_IENUM_IF_UNSET(&style->visibility, val, enum_visibility, true);
886 break;
887 /* SVG */
888 /* Clip/Mask */
889 case SP_PROP_CLIP_PATH:
890 g_warning("Unimplemented style property SP_PROP_CLIP_PATH: value: %s", val);
891 break;
892 case SP_PROP_CLIP_RULE:
893 g_warning("Unimplemented style property SP_PROP_CLIP_RULE: value: %s", val);
894 break;
895 case SP_PROP_MASK:
896 g_warning("Unimplemented style property SP_PROP_MASK: value: %s", val);
897 break;
898 case SP_PROP_OPACITY:
899 if (!style->opacity.set) {
900 sp_style_read_iscale24(&style->opacity, val);
901 }
902 break;
903 case SP_PROP_ENABLE_BACKGROUND:
904 g_warning("Unimplemented style property SP_PROP_ENABLE_BACKGROUND: value: %s", val);
905 break;
906 /* Filter */
907 case SP_PROP_FILTER:
908 if (!style->filter.set && !style->filter.inherit) {
909 sp_style_read_ifilter(&style->filter, val, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
910 }
911 break;
912 case SP_PROP_FLOOD_COLOR:
913 g_warning("Unimplemented style property SP_PROP_FLOOD_COLOR: value: %s", val);
914 break;
915 case SP_PROP_FLOOD_OPACITY:
916 g_warning("Unimplemented style property SP_PROP_FLOOD_OPACITY: value: %s", val);
917 break;
918 case SP_PROP_LIGHTING_COLOR:
919 g_warning("Unimplemented style property SP_PROP_LIGHTING_COLOR: value: %s", val);
920 break;
921 /* Gradient */
922 case SP_PROP_STOP_COLOR:
923 g_warning("Unimplemented style property SP_PROP_STOP_COLOR: value: %s", val);
924 break;
925 case SP_PROP_STOP_OPACITY:
926 g_warning("Unimplemented style property SP_PROP_STOP_OPACITY: value: %s", val);
927 break;
928 /* Interactivity */
929 case SP_PROP_POINTER_EVENTS:
930 g_warning("Unimplemented style property SP_PROP_POINTER_EVENTS: value: %s", val);
931 break;
932 /* Paint */
933 case SP_PROP_COLOR_INTERPOLATION:
934 g_warning("Unimplemented style property SP_PROP_COLOR_INTERPOLATION: value: %s", val);
935 break;
936 case SP_PROP_COLOR_INTERPOLATION_FILTERS:
937 g_warning("Unimplemented style property SP_PROP_INTERPOLATION_FILTERS: value: %s", val);
938 break;
939 case SP_PROP_COLOR_PROFILE:
940 g_warning("Unimplemented style property SP_PROP_COLOR_PROFILE: value: %s", val);
941 break;
942 case SP_PROP_COLOR_RENDERING: {
943 /* Ignore the hint. */
944 SPIEnum dummy;
945 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_color_rendering, true);
946 break;
947 }
948 case SP_PROP_FILL:
949 if (!style->fill.set) {
950 sp_style_read_ipaint(&style->fill, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
951 }
952 break;
953 case SP_PROP_FILL_OPACITY:
954 if (!style->fill_opacity.set) {
955 sp_style_read_iscale24(&style->fill_opacity, val);
956 }
957 break;
958 case SP_PROP_FILL_RULE:
959 if (!style->fill_rule.set) {
960 sp_style_read_ienum(&style->fill_rule, val, enum_fill_rule, true);
961 }
962 break;
963 case SP_PROP_IMAGE_RENDERING: {
964 /* Ignore the hint. */
965 SPIEnum dummy;
966 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_image_rendering, true);
967 break;
968 }
969 case SP_PROP_MARKER:
970 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
971 /* style->marker[SP_MARKER_LOC] = g_quark_from_string(val); */
972 marker_status("Setting SP_PROP_MARKER");
973 if (!style->marker[SP_MARKER_LOC].set) {
974 g_free(style->marker[SP_MARKER_LOC].value);
975 style->marker[SP_MARKER_LOC].value = g_strdup(val);
976 style->marker[SP_MARKER_LOC].set = TRUE;
977 style->marker[SP_MARKER_LOC].inherit = (val && !strcmp(val, "inherit"));
978 }
979 break;
981 case SP_PROP_MARKER_START:
982 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
983 marker_status("Setting SP_PROP_MARKER_START");
984 if (!style->marker[SP_MARKER_LOC_START].set) {
985 g_free(style->marker[SP_MARKER_LOC_START].value);
986 style->marker[SP_MARKER_LOC_START].value = g_strdup(val);
987 style->marker[SP_MARKER_LOC_START].set = TRUE;
988 style->marker[SP_MARKER_LOC_START].inherit = (val && !strcmp(val, "inherit"));
989 }
990 break;
991 case SP_PROP_MARKER_MID:
992 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
993 marker_status("Setting SP_PROP_MARKER_MID");
994 if (!style->marker[SP_MARKER_LOC_MID].set) {
995 g_free(style->marker[SP_MARKER_LOC_MID].value);
996 style->marker[SP_MARKER_LOC_MID].value = g_strdup(val);
997 style->marker[SP_MARKER_LOC_MID].set = TRUE;
998 style->marker[SP_MARKER_LOC_MID].inherit = (val && !strcmp(val, "inherit"));
999 }
1000 break;
1001 case SP_PROP_MARKER_END:
1002 /* TODO: Call sp_uri_reference_resolve(SPDocument *document, guchar const *uri) */
1003 marker_status("Setting SP_PROP_MARKER_END");
1004 if (!style->marker[SP_MARKER_LOC_END].set) {
1005 g_free(style->marker[SP_MARKER_LOC_END].value);
1006 style->marker[SP_MARKER_LOC_END].value = g_strdup(val);
1007 style->marker[SP_MARKER_LOC_END].set = TRUE;
1008 style->marker[SP_MARKER_LOC_END].inherit = (val && !strcmp(val, "inherit"));
1009 }
1010 break;
1012 case SP_PROP_SHAPE_RENDERING: {
1013 /* Ignore the hint. */
1014 SPIEnum dummy;
1015 SPS_READ_IENUM_IF_UNSET(&dummy, val, enum_shape_rendering, true);
1016 break;
1017 }
1019 case SP_PROP_STROKE:
1020 if (!style->stroke.set) {
1021 sp_style_read_ipaint(&style->stroke, val, style, (style->object) ? SP_OBJECT_DOCUMENT(style->object) : NULL);
1022 }
1023 break;
1024 case SP_PROP_STROKE_WIDTH:
1025 SPS_READ_ILENGTH_IF_UNSET(&style->stroke_width, val);
1026 break;
1027 case SP_PROP_STROKE_DASHARRAY:
1028 if (!style->stroke_dasharray_set) {
1029 sp_style_read_dash(style, val);
1030 }
1031 break;
1032 case SP_PROP_STROKE_DASHOFFSET:
1033 if (!style->stroke_dashoffset_set) {
1034 /* fixme */
1035 if (sp_svg_number_read_d(val, &style->stroke_dash.offset)) {
1036 style->stroke_dashoffset_set = TRUE;
1037 } else {
1038 style->stroke_dashoffset_set = FALSE;
1039 }
1040 }
1041 break;
1042 case SP_PROP_STROKE_LINECAP:
1043 if (!style->stroke_linecap.set) {
1044 sp_style_read_ienum(&style->stroke_linecap, val, enum_stroke_linecap, true);
1045 }
1046 break;
1047 case SP_PROP_STROKE_LINEJOIN:
1048 if (!style->stroke_linejoin.set) {
1049 sp_style_read_ienum(&style->stroke_linejoin, val, enum_stroke_linejoin, true);
1050 }
1051 break;
1052 case SP_PROP_STROKE_MITERLIMIT:
1053 if (!style->stroke_miterlimit.set) {
1054 sp_style_read_ifloat(&style->stroke_miterlimit, val);
1055 }
1056 break;
1057 case SP_PROP_STROKE_OPACITY:
1058 if (!style->stroke_opacity.set) {
1059 sp_style_read_iscale24(&style->stroke_opacity, val);
1060 }
1061 break;
1063 default:
1064 g_warning("Invalid style property id: %d value: %s", id, val);
1065 break;
1066 }
1067 }
1069 static void
1070 sp_style_merge_style_from_decl(SPStyle *const style, CRDeclaration const *const decl)
1071 {
1072 /** \todo Ensure that property is lcased, as per
1073 * http://www.w3.org/TR/REC-CSS2/syndata.html#q4.
1074 * Should probably be done in libcroco.
1075 */
1076 unsigned const prop_idx = sp_attribute_lookup(decl->property->stryng->str);
1077 if (prop_idx != SP_ATTR_INVALID) {
1078 /** \todo
1079 * effic: Test whether the property is already set before trying to
1080 * convert to string. Alternatively, set from CRTerm directly rather
1081 * than converting to string.
1082 */
1083 guchar *const str_value_unsigned = cr_term_to_string(decl->value);
1084 gchar *const str_value = reinterpret_cast<gchar *>(str_value_unsigned);
1085 sp_style_merge_property(style, prop_idx, str_value);
1086 g_free(str_value);
1087 }
1088 }
1090 static void
1091 sp_style_merge_from_props(SPStyle *const style, CRPropList *const props)
1092 {
1093 #if 0 /* forwards */
1094 for (CRPropList const *cur = props; cur; cur = cr_prop_list_get_next(cur)) {
1095 CRDeclaration *decl = NULL;
1096 cr_prop_list_get_decl(cur, &decl);
1097 sp_style_merge_style_from_decl(style, decl);
1098 }
1099 #else /* in reverse order, as we need later declarations to take precedence over earlier ones. */
1100 if (props) {
1101 sp_style_merge_from_props(style, cr_prop_list_get_next(props));
1102 CRDeclaration *decl = NULL;
1103 cr_prop_list_get_decl(props, &decl);
1104 sp_style_merge_style_from_decl(style, decl);
1105 }
1106 #endif
1107 }
1109 /**
1110 * \pre decl_list != NULL
1111 */
1112 static void
1113 sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list)
1114 {
1115 if (decl_list->next) {
1116 sp_style_merge_from_decl_list(style, decl_list->next);
1117 }
1118 sp_style_merge_style_from_decl(style, decl_list);
1119 }
1121 static CRSelEng *
1122 sp_repr_sel_eng()
1123 {
1124 CRSelEng *const ret = cr_sel_eng_new();
1125 cr_sel_eng_set_node_iface(ret, &Inkscape::XML::croco_node_iface);
1127 /** \todo
1128 * Check whether we need to register any pseudo-class handlers.
1129 * libcroco has its own default handlers for first-child and lang.
1130 *
1131 * We probably want handlers for link and arguably visited (though
1132 * inkscape can't visit links at the time of writing). hover etc.
1133 * more useful in inkview than the editor inkscape.
1134 *
1135 * http://www.w3.org/TR/SVG11/styling.html#StylingWithCSS says that
1136 * the following should be honoured, at least by inkview:
1137 * :hover, :active, :focus, :visited, :link.
1138 */
1140 g_assert(ret);
1141 return ret;
1142 }
1144 static void
1145 sp_style_merge_from_object_stylesheet(SPStyle *const style, SPObject const *const object)
1146 {
1147 static CRSelEng *sel_eng = NULL;
1148 if (!sel_eng) {
1149 sel_eng = sp_repr_sel_eng();
1150 }
1152 CRPropList *props = NULL;
1153 CRStatus status = cr_sel_eng_get_matched_properties_from_cascade(sel_eng,
1154 object->document->style_cascade,
1155 object->repr,
1156 &props);
1157 g_return_if_fail(status == CR_OK);
1158 /// \todo Check what errors can occur, and handle them properly.
1159 if (props) {
1160 sp_style_merge_from_props(style, props);
1161 cr_prop_list_destroy(props);
1162 }
1163 }
1165 /**
1166 * Parses a style="..." string and merges it with an existing SPStyle.
1167 */
1168 void
1169 sp_style_merge_from_style_string(SPStyle *const style, gchar const *const p)
1170 {
1171 /*
1172 * Reference: http://www.w3.org/TR/SVG11/styling.html#StyleAttribute:
1173 * ``When CSS styling is used, CSS inline style is specified by including
1174 * semicolon-separated property declarations of the form "name : value"
1175 * within the style attribute''.
1176 *
1177 * That's fairly ambiguous. Is a `value' allowed to contain semicolons?
1178 * Why does it say "including", what else is allowed in the style
1179 * attribute value?
1180 */
1182 CRDeclaration *const decl_list
1183 = cr_declaration_parse_list_from_buf(reinterpret_cast<guchar const *>(p), CR_UTF_8);
1184 if (decl_list) {
1185 sp_style_merge_from_decl_list(style, decl_list);
1186 cr_declaration_destroy(decl_list);
1187 }
1188 }
1190 /** Indexed by SP_CSS_FONT_SIZE_blah. */
1191 static float const font_size_table[] = {6.0, 8.0, 10.0, 12.0, 14.0, 18.0, 24.0};
1193 static void
1194 sp_style_merge_font_size_from_parent(SPIFontSize &child, SPIFontSize const &parent)
1195 {
1196 /* 'font-size' */
1197 if (!child.set || child.inherit) {
1198 /* Inherit the computed value. Reference: http://www.w3.org/TR/SVG11/styling.html#Inheritance */
1199 child.computed = parent.computed;
1200 } else if (child.type == SP_FONT_SIZE_LITERAL) {
1201 /** \todo
1202 * fixme: SVG and CSS do not specify clearly, whether we should use
1203 * user or screen coordinates (Lauris)
1204 */
1205 if (child.value < SP_CSS_FONT_SIZE_SMALLER) {
1206 child.computed = font_size_table[child.value];
1207 } else if (child.value == SP_CSS_FONT_SIZE_SMALLER) {
1208 child.computed = parent.computed / 1.2;
1209 } else if (child.value == SP_CSS_FONT_SIZE_LARGER) {
1210 child.computed = parent.computed * 1.2;
1211 } else {
1212 /* Illegal value */
1213 }
1214 } else if (child.type == SP_FONT_SIZE_PERCENTAGE) {
1215 /* Unlike most other lengths, percentage for font size is relative to parent computed value
1216 * rather than viewport. */
1217 child.computed = parent.computed * SP_F8_16_TO_FLOAT(child.value);
1218 }
1219 }
1221 /**
1222 * Sets computed values in \a style, which may involve inheriting from (or in some other way
1223 * calculating from) corresponding computed values of \a parent.
1224 *
1225 * References: http://www.w3.org/TR/SVG11/propidx.html shows what properties inherit by default.
1226 * http://www.w3.org/TR/SVG11/styling.html#Inheritance gives general rules as to what it means to
1227 * inherit a value. http://www.w3.org/TR/REC-CSS2/cascade.html#computed-value is more precise
1228 * about what the computed value is (not obvious for lengths).
1229 *
1230 * \pre \a parent's computed values are already up-to-date.
1231 */
1232 void
1233 sp_style_merge_from_parent(SPStyle *const style, SPStyle const *const parent)
1234 {
1235 g_return_if_fail(style != NULL);
1237 /** \todo
1238 * fixme: Check for existing callers that might pass null parent.
1239 * This should probably be g_return_if_fail, or else we should make a
1240 * best attempt to set computed values correctly without having a parent
1241 * (i.e., by assuming parent has initial values).
1242 */
1243 if (!parent)
1244 return;
1246 /* CSS2 */
1247 /* Font */
1248 sp_style_merge_font_size_from_parent(style->font_size, parent->font_size);
1250 /* 'font-style' */
1251 if (!style->font_style.set || style->font_style.inherit) {
1252 style->font_style.computed = parent->font_style.computed;
1253 }
1255 /* 'font-variant' */
1256 if (!style->font_variant.set || style->font_variant.inherit) {
1257 style->font_variant.computed = parent->font_variant.computed;
1258 }
1260 /* 'font-weight' */
1261 if (!style->font_weight.set || style->font_weight.inherit) {
1262 style->font_weight.computed = parent->font_weight.computed;
1263 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_NORMAL) {
1264 /** \todo
1265 * fixme: This is unconditional, i.e., happens even if parent not
1266 * present.
1267 */
1268 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
1269 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLD) {
1270 style->font_weight.computed = SP_CSS_FONT_WEIGHT_700;
1271 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_LIGHTER) {
1272 unsigned const parent_val = parent->font_weight.computed;
1273 g_assert(SP_CSS_FONT_WEIGHT_100 == 0);
1274 // strictly, 'bolder' and 'lighter' should go to the next weight
1275 // expressible in the current font family, but that's difficult to
1276 // find out, so jumping by 3 seems an appropriate approximation
1277 style->font_weight.computed = (parent_val <= SP_CSS_FONT_WEIGHT_100 + 3
1278 ? (unsigned)SP_CSS_FONT_WEIGHT_100
1279 : parent_val - 3);
1280 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1281 } else if (style->font_weight.value == SP_CSS_FONT_WEIGHT_BOLDER) {
1282 unsigned const parent_val = parent->font_weight.computed;
1283 g_assert(parent_val <= SP_CSS_FONT_WEIGHT_900);
1284 style->font_weight.computed = (parent_val >= SP_CSS_FONT_WEIGHT_900 - 3
1285 ? (unsigned)SP_CSS_FONT_WEIGHT_900
1286 : parent_val + 3);
1287 g_assert(style->font_weight.computed <= (unsigned) SP_CSS_FONT_WEIGHT_900);
1288 }
1290 /* 'font-stretch' */
1291 if (!style->font_stretch.set || style->font_stretch.inherit) {
1292 style->font_stretch.computed = parent->font_stretch.computed;
1293 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_NARROWER) {
1294 unsigned const parent_val = parent->font_stretch.computed;
1295 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_CONDENSED
1296 ? parent_val
1297 : parent_val - 1);
1298 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1299 } else if (style->font_stretch.value == SP_CSS_FONT_STRETCH_WIDER) {
1300 unsigned const parent_val = parent->font_stretch.computed;
1301 g_assert(parent_val <= SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1302 style->font_stretch.computed = (parent_val == SP_CSS_FONT_STRETCH_ULTRA_EXPANDED
1303 ? parent_val
1304 : parent_val + 1);
1305 g_assert(style->font_stretch.computed <= (unsigned) SP_CSS_FONT_STRETCH_ULTRA_EXPANDED);
1306 }
1308 /* text (css2) */
1309 if (!style->text_indent.set || style->text_indent.inherit) {
1310 style->text_indent.computed = parent->text_indent.computed;
1311 }
1313 if (!style->text_align.set || style->text_align.inherit) {
1314 style->text_align.computed = parent->text_align.computed;
1315 }
1317 if (!style->text_decoration.set || style->text_decoration.inherit) {
1318 style->text_decoration.underline = parent->text_decoration.underline;
1319 style->text_decoration.overline = parent->text_decoration.overline;
1320 style->text_decoration.line_through = parent->text_decoration.line_through;
1321 style->text_decoration.blink = parent->text_decoration.blink;
1322 }
1324 if (!style->line_height.set || style->line_height.inherit) {
1325 style->line_height.computed = parent->line_height.computed;
1326 style->line_height.normal = parent->line_height.normal;
1327 }
1329 if (!style->letter_spacing.set || style->letter_spacing.inherit) {
1330 style->letter_spacing.computed = parent->letter_spacing.computed;
1331 style->letter_spacing.normal = parent->letter_spacing.normal;
1332 }
1334 if (!style->word_spacing.set || style->word_spacing.inherit) {
1335 style->word_spacing.computed = parent->word_spacing.computed;
1336 style->word_spacing.normal = parent->word_spacing.normal;
1337 }
1339 if (!style->text_transform.set || style->text_transform.inherit) {
1340 style->text_transform.computed = parent->text_transform.computed;
1341 }
1343 if (!style->direction.set || style->direction.inherit) {
1344 style->direction.computed = parent->direction.computed;
1345 }
1347 if (!style->block_progression.set || style->block_progression.inherit) {
1348 style->block_progression.computed = parent->block_progression.computed;
1349 }
1351 if (!style->writing_mode.set || style->writing_mode.inherit) {
1352 style->writing_mode.computed = parent->writing_mode.computed;
1353 }
1355 if (!style->text_anchor.set || style->text_anchor.inherit) {
1356 style->text_anchor.computed = parent->text_anchor.computed;
1357 }
1359 if (style->opacity.inherit) {
1360 style->opacity.value = parent->opacity.value;
1361 }
1363 /* Color */
1364 if (!style->color.set || style->color.inherit) {
1365 sp_style_merge_ipaint(style, &style->color, &parent->color);
1366 }
1368 /* Fill */
1369 if (!style->fill.set || style->fill.inherit || style->fill.currentcolor) {
1370 sp_style_merge_ipaint(style, &style->fill, &parent->fill);
1371 }
1373 if (!style->fill_opacity.set || style->fill_opacity.inherit) {
1374 style->fill_opacity.value = parent->fill_opacity.value;
1375 }
1377 if (!style->fill_rule.set || style->fill_rule.inherit) {
1378 style->fill_rule.computed = parent->fill_rule.computed;
1379 }
1381 /* Stroke */
1382 if (!style->stroke.set || style->stroke.inherit || style->stroke.currentcolor) {
1383 sp_style_merge_ipaint(style, &style->stroke, &parent->stroke);
1384 }
1386 if (!style->stroke_width.set || style->stroke_width.inherit) {
1387 style->stroke_width.computed = parent->stroke_width.computed;
1388 } else {
1389 /* Update computed value for any change in font inherited from parent. */
1390 double const em = style->font_size.computed;
1391 if (style->stroke_width.unit == SP_CSS_UNIT_EM) {
1392 style->stroke_width.computed = style->stroke_width.value * em;
1393 } else if (style->stroke_width.unit == SP_CSS_UNIT_EX) {
1394 double const ex = em * 0.5; // fixme: Get x height from libnrtype or pango.
1395 style->stroke_width.computed = style->stroke_width.value * ex;
1396 }
1397 }
1399 if (!style->stroke_linecap.set || style->stroke_linecap.inherit) {
1400 style->stroke_linecap.computed = parent->stroke_linecap.computed;
1401 }
1403 if (!style->stroke_linejoin.set || style->stroke_linejoin.inherit) {
1404 style->stroke_linejoin.computed = parent->stroke_linejoin.computed;
1405 }
1407 if (!style->stroke_miterlimit.set || style->stroke_miterlimit.inherit) {
1408 style->stroke_miterlimit.value = parent->stroke_miterlimit.value;
1409 }
1411 if (!style->stroke_dasharray_set && parent->stroke_dasharray_set) {
1412 /** \todo
1413 * This code looks wrong. Why does the logic differ from the
1414 * above properties? Similarly dashoffset below.
1415 */
1416 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1417 if (style->stroke_dash.n_dash > 0) {
1418 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1419 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1420 }
1421 }
1423 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1424 style->stroke_dash.offset = parent->stroke_dash.offset;
1425 }
1427 if (!style->stroke_opacity.set || style->stroke_opacity.inherit) {
1428 style->stroke_opacity.value = parent->stroke_opacity.value;
1429 }
1431 if (style->text && parent->text) {
1432 if (!style->text->font_family.set || style->text->font_family.inherit) {
1433 g_free(style->text->font_family.value);
1434 style->text->font_family.value = g_strdup(parent->text->font_family.value);
1435 }
1436 }
1438 /* Markers - Free the old value and make copy of the new */
1439 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1440 if (!style->marker[i].set || style->marker[i].inherit) {
1441 g_free(style->marker[i].value);
1442 style->marker[i].value = g_strdup(parent->marker[i].value);
1443 }
1444 }
1446 /* Filter effects */
1447 if(style->filter.set && style->filter.inherit) {
1448 sp_style_merge_ifilter(&style->filter, &parent->filter);
1449 }
1450 }
1452 template <typename T>
1453 static void
1454 sp_style_merge_prop_from_dying_parent(T &child, T const &parent)
1455 {
1456 if ( ( !(child.set) || child.inherit )
1457 && parent.set && !(parent.inherit) )
1458 {
1459 child = parent;
1460 }
1461 }
1463 /**
1464 * Copy SPIString from parent to child.
1465 */
1466 static void
1467 sp_style_merge_string_prop_from_dying_parent(SPIString &child, SPIString const &parent)
1468 {
1469 if ( ( !(child.set) || child.inherit )
1470 && parent.set && !(parent.inherit) )
1471 {
1472 g_free(child.value);
1473 child.value = g_strdup(parent.value);
1474 child.set = parent.set;
1475 child.inherit = parent.inherit;
1476 }
1477 }
1479 static void
1480 sp_style_merge_paint_prop_from_dying_parent(SPStyle *style,
1481 SPIPaint &child, SPIPaint const &parent)
1482 {
1483 /** \todo
1484 * I haven't given this much attention. See comments below about
1485 * currentColor, colorProfile, and relative URIs.
1486 */
1487 if (!child.set || child.inherit || child.currentcolor) {
1488 sp_style_merge_ipaint(style, &child, &parent);
1489 child.set = parent.set;
1490 child.inherit = parent.inherit;
1491 }
1492 }
1494 static void
1495 sp_style_merge_rel_enum_prop_from_dying_parent(SPIEnum &child, SPIEnum const &parent,
1496 unsigned const max_computed_val,
1497 unsigned const smaller_val)
1498 {
1499 /* We assume that min computed val is 0, contiguous up to max_computed_val,
1500 then zero or more other absolute values, then smaller_val then larger_val. */
1501 unsigned const min_computed_val = 0;
1502 unsigned const larger_val = smaller_val + 1;
1503 g_return_if_fail(min_computed_val < max_computed_val);
1504 g_return_if_fail(max_computed_val < smaller_val);
1506 if (parent.set && !parent.inherit) {
1507 if (!child.set || child.inherit) {
1508 child.value = parent.value;
1509 child.set = parent.set; // i.e. true
1510 child.inherit = parent.inherit; // i.e. false
1511 } else if (child.value < smaller_val) {
1512 /* Child has absolute value: leave as is. */
1513 } else if ( ( child.value == smaller_val
1514 && parent.value == larger_val )
1515 || ( parent.value == smaller_val
1516 && child.value == larger_val ) )
1517 {
1518 child.set = false;
1519 /*
1520 * Note that this can result in a change in computed value in the
1521 * rare case that the parent's setting was a no-op (i.e. if the
1522 * parent's parent's computed value was already ultra-condensed or
1523 * ultra-expanded). However, I'd guess that the change is for the
1524 * better: I'd guess that if the properties were specified
1525 * relatively, then the intent is to counteract parent's effect.
1526 * I.e. I believe this is the best code even in that case.
1527 */
1528 } else if (child.value == parent.value) {
1529 /* Leave as is. */
1530 /** \todo
1531 * It's unclear what to do if style and parent specify the same
1532 * relative directive (narrower or wider). We can either convert
1533 * to absolute specification or coalesce to a single relative
1534 * request (of half the strength of the original pair).
1535 *
1536 * Converting to a single level of relative specification is a
1537 * better choice if the newly-unlinked clone is itself cloned to
1538 * other contexts (inheriting different font stretchiness): it
1539 * would preserve the effect that it will be narrower than
1540 * the inherited context in each case. The disadvantage is that
1541 * it will ~certainly affect the computed value of the
1542 * newly-unlinked clone.
1543 */
1544 } else {
1545 unsigned const parent_val = parent.computed;
1546 child.value = ( child.value == smaller_val
1547 ? ( parent_val == min_computed_val
1548 ? parent_val
1549 : parent_val - 1 )
1550 : ( parent_val == max_computed_val
1551 ? parent_val
1552 : parent_val + 1 ) );
1553 g_assert(child.value <= max_computed_val);
1554 child.inherit = false;
1555 g_assert(child.set);
1556 }
1557 }
1558 }
1560 template <typename LengthT>
1561 static void
1562 sp_style_merge_length_prop_from_dying_parent(LengthT &child, LengthT const &parent,
1563 double const parent_child_em_ratio)
1564 {
1565 if ( ( !(child.set) || child.inherit )
1566 && parent.set && !(parent.inherit) )
1567 {
1568 child = parent;
1569 switch (parent.unit) {
1570 case SP_CSS_UNIT_EM:
1571 case SP_CSS_UNIT_EX:
1572 child.value *= parent_child_em_ratio;
1573 /** \todo
1574 * fixme: Have separate ex ratio parameter.
1575 * Get x height from libnrtype or pango.
1576 */
1577 if (!isFinite(child.value)) {
1578 child.value = child.computed;
1579 child.unit = SP_CSS_UNIT_NONE;
1580 }
1581 break;
1583 default:
1584 break;
1585 }
1586 }
1587 }
1589 static double
1590 get_relative_font_size_frac(SPIFontSize const &font_size)
1591 {
1592 switch (font_size.type) {
1593 case SP_FONT_SIZE_LITERAL: {
1594 switch (font_size.value) {
1595 case SP_CSS_FONT_SIZE_SMALLER:
1596 return 5.0 / 6.0;
1598 case SP_CSS_FONT_SIZE_LARGER:
1599 return 6.0 / 5.0;
1601 default:
1602 g_assert_not_reached();
1603 }
1604 }
1606 case SP_FONT_SIZE_PERCENTAGE:
1607 return SP_F8_16_TO_FLOAT(font_size.value);
1609 case SP_FONT_SIZE_LENGTH:
1610 g_assert_not_reached();
1611 }
1612 g_assert_not_reached();
1613 }
1615 /**
1616 * Combine \a style and \a parent style specifications into a single style specification that
1617 * preserves (as much as possible) the effect of the existing \a style being a child of \a parent.
1618 *
1619 * Called when the parent repr is to be removed (e.g. the parent is a \<use\> element that is being
1620 * unlinked), in which case we copy/adapt property values that are explicitly set in \a parent,
1621 * trying to retain the same visual appearance once the parent is removed. Interesting cases are
1622 * when there is unusual interaction with the parent's value (opacity, display) or when the value
1623 * can be specified as relative to the parent computed value (font-size, font-weight etc.).
1624 *
1625 * Doesn't update computed values of \a style. For correctness, you should subsequently call
1626 * sp_style_merge_from_parent against the new parent (presumably \a parent's parent) even if \a
1627 * style was previously up-to-date wrt \a parent.
1628 *
1629 * \pre \a parent's computed values are already up-to-date.
1630 * (\a style's computed values needn't be up-to-date.)
1631 */
1632 void
1633 sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const parent)
1634 {
1635 /** \note
1636 * The general rule for each property is as follows:
1637 *
1638 * If style is set to an absolute value, then leave it as is.
1639 *
1640 * Otherwise (i.e. if style has a relative value):
1641 *
1642 * If parent is set to an absolute value, then set style to the computed value.
1643 *
1644 * Otherwise, calculate the combined relative value (e.g. multiplying the two percentages).
1645 */
1647 /* We do font-size first, to ensure that em size is up-to-date. */
1648 /** \todo
1649 * fixme: We'll need to have more font-related things up the top once
1650 * we're getting x-height from pango or libnrtype.
1651 */
1653 /* Some things that allow relative specifications. */
1654 {
1655 /* font-size. Note that we update the computed font-size of style,
1656 to assist in em calculations later in this function. */
1657 if (parent->font_size.set && !parent->font_size.inherit) {
1658 if (!style->font_size.set || style->font_size.inherit) {
1659 /* font_size inherits the computed value, so we can use the parent value
1660 * verbatim. */
1661 style->font_size = parent->font_size;
1662 } else if ( style->font_size.type == SP_FONT_SIZE_LENGTH ) {
1663 /* Child already has absolute size (stored in computed value), so do nothing. */
1664 } else if ( style->font_size.type == SP_FONT_SIZE_LITERAL
1665 && style->font_size.value < SP_CSS_FONT_SIZE_SMALLER ) {
1666 /* Child already has absolute size, but we ensure that the computed value
1667 is up-to-date. */
1668 unsigned const ix = style->font_size.value;
1669 g_assert(ix < G_N_ELEMENTS(font_size_table));
1670 style->font_size.computed = font_size_table[ix];
1671 } else {
1672 /* Child has relative size. */
1673 double const child_frac(get_relative_font_size_frac(style->font_size));
1674 style->font_size.set = true;
1675 style->font_size.inherit = false;
1676 style->font_size.computed = parent->font_size.computed * child_frac;
1678 if ( ( parent->font_size.type == SP_FONT_SIZE_LITERAL
1679 && parent->font_size.value < SP_CSS_FONT_SIZE_SMALLER )
1680 || parent->font_size.type == SP_FONT_SIZE_LENGTH )
1681 {
1682 /* Absolute value. */
1683 style->font_size.type = SP_FONT_SIZE_LENGTH;
1684 /* .value is unused for SP_FONT_SIZE_LENGTH. */
1685 } else {
1686 /* Relative value. */
1687 double const parent_frac(get_relative_font_size_frac(parent->font_size));
1688 style->font_size.type = SP_FONT_SIZE_PERCENTAGE;
1689 style->font_size.value = SP_F8_16_FROM_FLOAT(parent_frac * child_frac);
1690 }
1691 }
1692 }
1694 /* 'font-stretch' */
1695 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_stretch,
1696 parent->font_stretch,
1697 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
1698 SP_CSS_FONT_STRETCH_NARROWER);
1700 /* font-weight */
1701 sp_style_merge_rel_enum_prop_from_dying_parent(style->font_weight,
1702 parent->font_weight,
1703 SP_CSS_FONT_WEIGHT_900,
1704 SP_CSS_FONT_WEIGHT_LIGHTER);
1705 }
1708 /* Enum values that don't have any relative settings (other than `inherit'). */
1709 {
1710 SPIEnum SPStyle::*const fields[] = {
1711 //nyi: SPStyle::clip_rule,
1712 //nyi: SPStyle::color_interpolation,
1713 //nyi: SPStyle::color_interpolation_filters,
1714 //nyi: SPStyle::color_rendering,
1715 &SPStyle::direction,
1716 &SPStyle::fill_rule,
1717 &SPStyle::font_style,
1718 &SPStyle::font_variant,
1719 //nyi: SPStyle::image_rendering,
1720 //nyi: SPStyle::pointer_events,
1721 //nyi: SPStyle::shape_rendering,
1722 &SPStyle::stroke_linecap,
1723 &SPStyle::stroke_linejoin,
1724 &SPStyle::text_anchor,
1725 //nyi: &SPStyle::text_rendering,
1726 &SPStyle::visibility,
1727 &SPStyle::writing_mode
1728 };
1730 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1731 SPIEnum SPStyle::*const fld = fields[i];
1732 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->*fld, parent->*fld);
1733 }
1734 }
1736 /* A few other simple inheritance properties. */
1737 {
1738 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->fill_opacity, parent->fill_opacity);
1739 sp_style_merge_prop_from_dying_parent<SPIScale24>(style->stroke_opacity, parent->stroke_opacity);
1740 sp_style_merge_prop_from_dying_parent<SPIFloat>(style->stroke_miterlimit, parent->stroke_miterlimit);
1742 /** \todo
1743 * We currently treat text-decoration as if it were a simple inherited
1744 * property (fixme). This code may need changing once we do the
1745 * special fill/stroke inheritance mentioned by the spec.
1746 */
1747 sp_style_merge_prop_from_dying_parent<SPITextDecoration>(style->text_decoration,
1748 parent->text_decoration);
1750 //nyi: font-size-adjust, // <number> | none | inherit
1751 //nyi: glyph-orientation-horizontal,
1752 //nyi: glyph-orientation-vertical,
1753 }
1755 /* Properties that involve length but are easy in other respects. */
1756 {
1757 /* The difficulty with lengths is that font-relative units need adjusting if the font
1758 * varies between parent & child.
1759 *
1760 * Lengths specified in the existing child can stay as they are: its computed font
1761 * specification should stay unchanged, so em & ex lengths should continue to mean the same
1762 * size.
1763 *
1764 * Lengths specified in the dying parent in em or ex need to be scaled according to the
1765 * ratio of em or ex size between parent & child.
1766 */
1767 double const parent_child_em_ratio = parent->font_size.computed / style->font_size.computed;
1769 SPILength SPStyle::*const lfields[] = {
1770 &SPStyle::stroke_width,
1771 &SPStyle::text_indent
1772 };
1773 for (unsigned i = 0; i < G_N_ELEMENTS(lfields); ++i) {
1774 SPILength SPStyle::*fld = lfields[i];
1775 sp_style_merge_length_prop_from_dying_parent<SPILength>(style->*fld,
1776 parent->*fld,
1777 parent_child_em_ratio);
1778 }
1780 SPILengthOrNormal SPStyle::*const nfields[] = {
1781 &SPStyle::letter_spacing,
1782 &SPStyle::line_height,
1783 &SPStyle::word_spacing
1784 };
1785 for (unsigned i = 0; i < G_N_ELEMENTS(nfields); ++i) {
1786 SPILengthOrNormal SPStyle::*fld = nfields[i];
1787 sp_style_merge_length_prop_from_dying_parent<SPILengthOrNormal>(style->*fld,
1788 parent->*fld,
1789 parent_child_em_ratio);
1790 }
1792 //nyi: &SPStyle::kerning: length or `auto'
1794 /* fixme: Move stroke-dash and stroke-dash-offset here once they
1795 can accept units. */
1796 }
1798 /* Properties that involve a URI but are easy in other respects. */
1799 {
1800 /** \todo
1801 * Could cause problems if original object was in another document
1802 * and it used a relative URL. (At the time of writing, we don't
1803 * allow hrefs to other documents, so this isn't a problem yet.)
1804 * Paint properties also allow URIs.
1805 */
1806 //nyi: cursor, // may involve change in effect, but we can't do much better
1807 //nyi: color-profile,
1809 // Markers (marker-start, marker-mid, marker-end).
1810 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
1811 sp_style_merge_string_prop_from_dying_parent(style->marker[i], parent->marker[i]);
1812 }
1813 }
1815 /* CSS2 */
1816 /* Font */
1818 if (style->text && parent->text) {
1819 sp_style_merge_string_prop_from_dying_parent(style->text->font_family,
1820 parent->text->font_family);
1821 }
1823 /* Properties that don't inherit by default. Most of these need special handling. */
1824 {
1825 /*
1826 * opacity's effect is cumulative; we set the new value to the combined effect. The
1827 * default value for opacity is 1.0, not inherit. (Note that stroke-opacity and
1828 * fill-opacity are quite different from opacity, and don't need any special handling.)
1829 *
1830 * Cases:
1831 * - parent & child were each previously unset, in which case the effective
1832 * opacity value is 1.0, and style should remain unset.
1833 * - parent was previously unset (so computed opacity value of 1.0)
1834 * and child was set to inherit. The merged child should
1835 * get a value of 1.0, and shouldn't inherit (lest the new parent
1836 * has a different opacity value). Given that opacity's default
1837 * value is 1.0 (rather than inherit), we might as well have the
1838 * merged child's opacity be unset.
1839 * - parent was previously unset (so opacity 1.0), and child was set to a number.
1840 * The merged child should retain its existing settings (though it doesn't matter
1841 * if we make it unset if that number was 1.0).
1842 * - parent was inherit and child was unset. Merged child should be set to inherit.
1843 * - parent was inherit and child was inherit. (We can't in general reproduce this
1844 * effect (short of introducing a new group), but setting opacity to inherit is rare.)
1845 * If the inherited value was strictly between 0.0 and 1.0 (exclusive) then the merged
1846 * child's value should be set to the product of the two, i.e. the square of the
1847 * inherited value, and should not be marked as inherit. (This decision assumes that it
1848 * is more important to retain the effective opacity than to retain the inheriting
1849 * effect, and assumes that the inheriting effect either isn't important enough to create
1850 * a group or isn't common enough to bother maintaining the code to create a group.) If
1851 * the inherited value was 0.0 or 1.0, then marking the merged child as inherit comes
1852 * closer to maintaining the effect.
1853 * - parent was inherit and child was set to a numerical value. If the child's value
1854 * was 1.0, then the merged child should have the same settings as the parent.
1855 * If the child's value was 0, then the merged child should also be set to 0.
1856 * If the child's value was anything else, then we do the same as for the inherit/inherit
1857 * case above: have the merged child set to the product of the two opacities and not
1858 * marked as inherit, for the same reasons as for that case.
1859 * - parent was set to a value, and child was unset. The merged child should have
1860 * parent's settings.
1861 * - parent was set to a value, and child was inherit. The merged child should
1862 * be set to the product, i.e. the square of the parent's value.
1863 * - parent & child are each set to a value. The merged child should be set to the
1864 * product.
1865 */
1866 if ( !style->opacity.set
1867 || ( !style->opacity.inherit
1868 && style->opacity.value == SP_SCALE24_MAX ) )
1869 {
1870 style->opacity = parent->opacity;
1871 } else {
1872 /* Ensure that style's computed value is up-to-date. */
1873 if (style->opacity.inherit) {
1874 style->opacity.value = parent->opacity.value;
1875 }
1877 /* Multiplication of opacities occurs even if a child's opacity is set to inherit. */
1878 style->opacity.value = SP_SCALE24_MUL(style->opacity.value,
1879 parent->opacity.value);
1881 style->opacity.inherit = (parent->opacity.inherit
1882 && style->opacity.inherit
1883 && (parent->opacity.value == 0 ||
1884 parent->opacity.value == SP_SCALE24_MAX));
1885 style->opacity.set = ( style->opacity.inherit
1886 || style->opacity.value < SP_SCALE24_MAX );
1887 }
1889 /* display is in principle similar to opacity, but implementation is easier. */
1890 if ( parent->display.set && !parent->display.inherit
1891 && parent->display.value == SP_CSS_DISPLAY_NONE ) {
1892 style->display.value = SP_CSS_DISPLAY_NONE;
1893 style->display.set = true;
1894 style->display.inherit = false;
1895 } else if (style->display.inherit) {
1896 style->display.value = parent->display.value;
1897 style->display.set = parent->display.set;
1898 style->display.inherit = parent->display.inherit;
1899 } else {
1900 /* Leave as is. (display doesn't inherit by default.) */
1901 }
1903 /** \todo
1904 * fixme: Check that we correctly handle all properties that don't
1905 * inherit by default (as shown in
1906 * http://www.w3.org/TR/SVG11/propidx.html for most SVG 1.1 properties).
1907 */
1908 }
1910 /* SPIPaint properties (including color). */
1911 {
1912 /** \todo
1913 * Think about the issues involved if specified as currentColor or
1914 * if specified relative to colorProfile, and if the currentColor or
1915 * colorProfile differs between parent \& child. See also comments
1916 * elsewhere in this function about URIs.
1917 */
1918 SPIPaint SPStyle::*const fields[] = {
1919 &SPStyle::color,
1920 &SPStyle::fill,
1921 &SPStyle::stroke
1922 };
1923 for (unsigned i = 0; i < G_N_ELEMENTS(fields); ++i) {
1924 SPIPaint SPStyle::*const fld = fields[i];
1925 sp_style_merge_paint_prop_from_dying_parent(style, style->*fld, parent->*fld);
1926 }
1927 }
1929 /* Things from SVG 1.2 or CSS3. */
1930 {
1931 /* Note: If we ever support setting string values for text-align then we'd need strdup
1932 * handling here. */
1933 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_align, parent->text_align);
1935 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->text_transform, parent->text_transform);
1936 sp_style_merge_prop_from_dying_parent<SPIEnum>(style->block_progression, parent->block_progression);
1937 }
1939 /* Note: this will need length handling once dasharray supports units. */
1940 if ( ( !style->stroke_dasharray_set || style->stroke_dasharray_inherit )
1941 && parent->stroke_dasharray_set && !parent->stroke_dasharray_inherit )
1942 {
1943 style->stroke_dash.n_dash = parent->stroke_dash.n_dash;
1944 if (style->stroke_dash.n_dash > 0) {
1945 style->stroke_dash.dash = g_new(gdouble, style->stroke_dash.n_dash);
1946 memcpy(style->stroke_dash.dash, parent->stroke_dash.dash, style->stroke_dash.n_dash * sizeof(gdouble));
1947 }
1948 style->stroke_dasharray_set = parent->stroke_dasharray_set;
1949 style->stroke_dasharray_inherit = parent->stroke_dasharray_inherit;
1950 }
1952 /* Note: this will need length handling once dasharray_offset supports units. */
1953 if (!style->stroke_dashoffset_set && parent->stroke_dashoffset_set) {
1954 style->stroke_dash.offset = parent->stroke_dash.offset;
1955 style->stroke_dashoffset_set = parent->stroke_dashoffset_set;
1956 /* fixme: we don't currently allow stroke-dashoffset to be `inherit'. TODO: Try to
1957 * represent it as a normal SPILength; though will need to do something about existing
1958 * users of stroke_dash.offset and stroke_dashoffset_set. */
1959 }
1961 /* TODO: deal with filters */
1962 }
1966 /**
1967 * Disconnects from possible fill and stroke paint servers.
1968 */
1969 static void
1970 sp_style_paint_server_release(SPObject *obj, SPStyle *style)
1971 {
1972 SPPaintServer *server=static_cast<SPPaintServer *>(obj);
1973 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1974 && (server == style->fill.value.paint.server))
1975 {
1976 sp_style_paint_clear(style, &style->fill);
1977 }
1979 if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
1980 && (server == style->stroke.value.paint.server))
1981 {
1982 sp_style_paint_clear(style, &style->stroke);
1983 }
1984 }
1989 /**
1990 * Emit style modified signal on style's object if server is style's fill
1991 * or stroke paint server.
1992 */
1993 static void
1994 sp_style_paint_server_modified(SPObject *obj, guint flags, SPStyle *style)
1995 {
1996 SPPaintServer *server = static_cast<SPPaintServer *>(obj);
1997 if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
1998 && (server == style->fill.value.paint.server))
1999 {
2000 if (style->object) {
2001 /** \todo
2002 * fixme: I do not know, whether it is optimal - we are
2003 * forcing reread of everything (Lauris)
2004 */
2005 /** \todo
2006 * fixme: We have to use object_modified flag, because parent
2007 * flag is only available downstreams.
2008 */
2009 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
2010 }
2011 } else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
2012 && (server == style->stroke.value.paint.server))
2013 {
2014 if (style->object) {
2015 /// \todo fixme:
2016 style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
2017 }
2018 } else {
2019 g_assert_not_reached();
2020 }
2021 }
2025 /**
2026 *
2027 */
2028 static void
2029 sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
2030 {
2031 sp_style_paint_clear(style, paint);
2033 if ((paint->set && paint->currentcolor) || parent->currentcolor) {
2034 paint->currentcolor = TRUE;
2035 paint->type = SP_PAINT_TYPE_COLOR;
2036 sp_color_copy(&paint->value.color, &style->color.value.color);
2037 return;
2038 }
2040 paint->type = parent->type;
2041 switch (paint->type) {
2042 case SP_PAINT_TYPE_COLOR:
2043 sp_color_copy(&paint->value.color, &parent->value.color);
2044 break;
2045 case SP_PAINT_TYPE_PAINTSERVER:
2046 paint->value.paint.server = parent->value.paint.server;
2047 paint->value.paint.uri = parent->value.paint.uri;
2048 if (paint->value.paint.server) {
2049 if (style->object && !style->cloned) { // href paintserver for style of non-clones only
2050 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
2051 if (paint == &style->fill) {
2052 style->fill_hreffed = true;
2053 } else {
2054 assert(paint == &style->stroke);
2055 style->stroke_hreffed = true;
2056 }
2057 }
2058 if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
2059 SPObject *server = paint->value.paint.server;
2060 sigc::connection release_connection
2061 = server->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_paint_server_release), style));
2062 sigc::connection modified_connection
2063 = server->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_paint_server_modified), style));
2064 if (paint == &style->fill) {
2065 style->fill_release_connection = release_connection;
2066 style->fill_modified_connection = modified_connection;
2067 } else {
2068 assert(paint == &style->stroke);
2069 style->stroke_release_connection = release_connection;
2070 style->stroke_modified_connection = modified_connection;
2071 }
2072 }
2073 }
2074 break;
2075 case SP_PAINT_TYPE_NONE:
2076 break;
2077 default:
2078 g_assert_not_reached();
2079 break;
2080 }
2081 }
2084 /**
2085 * Merge filter style from parent.
2086 * Filter effects do not inherit by default
2087 */
2088 static void
2089 sp_style_merge_ifilter(SPIFilter *child, SPIFilter const *parent)
2090 {
2091 child->set = parent->set;
2092 child->inherit = parent->inherit;
2093 child->filter = parent->filter;
2094 child->uri = parent->uri;
2095 }
2097 /**
2098 * Dumps the style to a CSS string, with either SP_STYLE_FLAG_IFSET or
2099 * SP_STYLE_FLAG_ALWAYS flags. Used with Always for copying an object's
2100 * complete cascaded style to style_clipboard. When you need a CSS string
2101 * for an object in the document tree, you normally call
2102 * sp_style_write_difference instead to take into account the object's parent.
2103 *
2104 * \pre style != NULL.
2105 * \pre flags in {IFSET, ALWAYS}.
2106 * \post ret != NULL.
2107 */
2108 gchar *
2109 sp_style_write_string(SPStyle const *const style, guint const flags)
2110 {
2111 /** \todo
2112 * Merge with write_difference, much duplicate code!
2113 */
2114 g_return_val_if_fail(style != NULL, NULL);
2115 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
2116 (flags == SP_STYLE_FLAG_ALWAYS) ),
2117 NULL);
2119 gchar c[BMAX];
2120 gchar *p = c;
2121 *p = '\0';
2123 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &style->font_size, NULL, flags);
2124 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &style->font_style, NULL, flags);
2125 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &style->font_variant, NULL, flags);
2126 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &style->font_weight, NULL, flags);
2127 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &style->font_stretch, NULL, flags);
2129 /* Text */
2130 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &style->text_indent, NULL, flags);
2131 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &style->text_align, NULL, flags);
2132 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &style->text_decoration, NULL, flags);
2133 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &style->line_height, NULL, flags);
2134 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &style->letter_spacing, NULL, flags);
2135 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &style->word_spacing, NULL, flags);
2136 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &style->text_transform, NULL, flags);
2137 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &style->direction, NULL, flags);
2138 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &style->block_progression, NULL, flags);
2139 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &style->writing_mode, NULL, flags);
2141 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &style->text_anchor, NULL, flags);
2143 /// \todo fixme: Per type methods need default flag too (lauris)
2144 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &style->opacity, NULL, flags);
2145 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &style->color, NULL, flags);
2146 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &style->fill, NULL, flags);
2147 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &style->fill_opacity, NULL, flags);
2148 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &style->fill_rule, NULL, flags);
2149 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &style->stroke, NULL, flags);
2150 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &style->stroke_width, NULL, flags);
2151 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap, &style->stroke_linecap, NULL, flags);
2152 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin, &style->stroke_linejoin, NULL, flags);
2154 marker_status("sp_style_write_string: Writing markers");
2155 if (style->marker[SP_MARKER_LOC].set) {
2156 p += g_snprintf(p, c + BMAX - p, "marker:%s;", style->marker[SP_MARKER_LOC].value);
2157 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2158 p += g_snprintf(p, c + BMAX - p, "marker:none;");
2159 }
2160 if (style->marker[SP_MARKER_LOC_START].set) {
2161 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", style->marker[SP_MARKER_LOC_START].value);
2162 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2163 p += g_snprintf(p, c + BMAX - p, "marker-start:none;");
2164 }
2165 if (style->marker[SP_MARKER_LOC_MID].set) {
2166 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", style->marker[SP_MARKER_LOC_MID].value);
2167 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2168 p += g_snprintf(p, c + BMAX - p, "marker-mid:none;");
2169 }
2170 if (style->marker[SP_MARKER_LOC_END].set) {
2171 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", style->marker[SP_MARKER_LOC_END].value);
2172 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2173 p += g_snprintf(p, c + BMAX - p, "marker-end:none;");
2174 }
2176 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit", &style->stroke_miterlimit, NULL, flags);
2178 /** \todo fixme: */
2179 if ((flags == SP_STYLE_FLAG_ALWAYS)
2180 || style->stroke_dasharray_set)
2181 {
2182 if (style->stroke_dasharray_inherit) {
2183 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2184 } else if (style->stroke_dash.n_dash && style->stroke_dash.dash) {
2185 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2186 gint i;
2187 for (i = 0; i < style->stroke_dash.n_dash; i++) {
2188 Inkscape::CSSOStringStream os;
2189 if (i) {
2190 os << ", ";
2191 }
2192 os << style->stroke_dash.dash[i];
2193 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2194 }
2195 if (p < c + BMAX) {
2196 *p++ = ';';
2197 }
2198 } else {
2199 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:none;");
2200 }
2201 }
2203 /** \todo fixme: */
2204 if (style->stroke_dashoffset_set) {
2205 Inkscape::CSSOStringStream os;
2206 os << "stroke-dashoffset:" << style->stroke_dash.offset << ";";
2207 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2208 } else if (flags == SP_STYLE_FLAG_ALWAYS) {
2209 p += g_snprintf(p, c + BMAX - p, "stroke-dashoffset:0;");
2210 }
2212 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &style->stroke_opacity, NULL, flags);
2214 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &style->visibility, NULL, flags);
2215 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &style->display, NULL, flags);
2216 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &style->overflow, NULL, flags);
2218 /* filter: */
2219 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &style->filter, NULL, flags);
2221 /* fixme: */
2222 p += sp_text_style_write(p, c + BMAX - p, style->text, flags);
2224 /* Get rid of trailing `;'. */
2225 if (p != c) {
2226 --p;
2227 if (*p == ';') {
2228 *p = '\0';
2229 }
2230 }
2232 return g_strdup(c);
2233 }
2236 #define STYLE_BUF_MAX
2239 /**
2240 * Dumps style to CSS string, see sp_style_write_string()
2241 *
2242 * \pre from != NULL.
2243 * \pre to != NULL.
2244 * \post ret != NULL.
2245 */
2246 gchar *
2247 sp_style_write_difference(SPStyle const *const from, SPStyle const *const to)
2248 {
2249 g_return_val_if_fail(from != NULL, NULL);
2250 g_return_val_if_fail(to != NULL, NULL);
2252 gchar c[BMAX], *p = c;
2253 *p = '\0';
2255 p += sp_style_write_ifontsize(p, c + BMAX - p, "font-size", &from->font_size, &to->font_size, SP_STYLE_FLAG_IFDIFF);
2256 p += sp_style_write_ienum(p, c + BMAX - p, "font-style", enum_font_style, &from->font_style, &to->font_style, SP_STYLE_FLAG_IFDIFF);
2257 p += sp_style_write_ienum(p, c + BMAX - p, "font-variant", enum_font_variant, &from->font_variant, &to->font_variant, SP_STYLE_FLAG_IFDIFF);
2258 p += sp_style_write_ienum(p, c + BMAX - p, "font-weight", enum_font_weight, &from->font_weight, &to->font_weight, SP_STYLE_FLAG_IFDIFF);
2259 p += sp_style_write_ienum(p, c + BMAX - p, "font-stretch", enum_font_stretch, &from->font_stretch, &to->font_stretch, SP_STYLE_FLAG_IFDIFF);
2261 /* Text */
2262 p += sp_style_write_ilength(p, c + BMAX - p, "text-indent", &from->text_indent, &to->text_indent, SP_STYLE_FLAG_IFDIFF);
2263 p += sp_style_write_ienum(p, c + BMAX - p, "text-align", enum_text_align, &from->text_align, &to->text_align, SP_STYLE_FLAG_IFDIFF);
2264 p += sp_style_write_itextdecoration(p, c + BMAX - p, "text-decoration", &from->text_decoration, &to->text_decoration, SP_STYLE_FLAG_IFDIFF);
2265 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "line-height", &from->line_height, &to->line_height, SP_STYLE_FLAG_IFDIFF);
2266 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "letter-spacing", &from->letter_spacing, &to->letter_spacing, SP_STYLE_FLAG_IFDIFF);
2267 p += sp_style_write_ilengthornormal(p, c + BMAX - p, "word-spacing", &from->word_spacing, &to->word_spacing, SP_STYLE_FLAG_IFDIFF);
2268 p += sp_style_write_ienum(p, c + BMAX - p, "text-transform", enum_text_transform, &from->text_transform, &to->text_transform, SP_STYLE_FLAG_IFDIFF);
2269 p += sp_style_write_ienum(p, c + BMAX - p, "direction", enum_direction, &from->direction, &to->direction, SP_STYLE_FLAG_IFDIFF);
2270 p += sp_style_write_ienum(p, c + BMAX - p, "block-progression", enum_block_progression, &from->block_progression, &to->block_progression, SP_STYLE_FLAG_IFDIFF);
2271 p += sp_style_write_ienum(p, c + BMAX - p, "writing-mode", enum_writing_mode, &from->writing_mode, &to->writing_mode, SP_STYLE_FLAG_IFDIFF);
2273 p += sp_style_write_ienum(p, c + BMAX - p, "text-anchor", enum_text_anchor, &from->text_anchor, &to->text_anchor, SP_STYLE_FLAG_IFDIFF);
2275 /// \todo fixme: Per type methods need default flag too
2276 if (from->opacity.set && from->opacity.value != SP_SCALE24_MAX) {
2277 p += sp_style_write_iscale24(p, c + BMAX - p, "opacity", &from->opacity, &to->opacity, SP_STYLE_FLAG_IFSET);
2278 }
2279 p += sp_style_write_ipaint(p, c + BMAX - p, "color", &from->color, &to->color, SP_STYLE_FLAG_IFSET);
2280 p += sp_style_write_ipaint(p, c + BMAX - p, "fill", &from->fill, &to->fill, SP_STYLE_FLAG_IFDIFF);
2281 p += sp_style_write_iscale24(p, c + BMAX - p, "fill-opacity", &from->fill_opacity, &to->fill_opacity, SP_STYLE_FLAG_IFDIFF);
2282 p += sp_style_write_ienum(p, c + BMAX - p, "fill-rule", enum_fill_rule, &from->fill_rule, &to->fill_rule, SP_STYLE_FLAG_IFDIFF);
2283 p += sp_style_write_ipaint(p, c + BMAX - p, "stroke", &from->stroke, &to->stroke, SP_STYLE_FLAG_IFDIFF);
2284 p += sp_style_write_ilength(p, c + BMAX - p, "stroke-width", &from->stroke_width, &to->stroke_width, SP_STYLE_FLAG_IFDIFF);
2285 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linecap", enum_stroke_linecap,
2286 &from->stroke_linecap, &to->stroke_linecap, SP_STYLE_FLAG_IFDIFF);
2287 p += sp_style_write_ienum(p, c + BMAX - p, "stroke-linejoin", enum_stroke_linejoin,
2288 &from->stroke_linejoin, &to->stroke_linejoin, SP_STYLE_FLAG_IFDIFF);
2289 p += sp_style_write_ifloat(p, c + BMAX - p, "stroke-miterlimit",
2290 &from->stroke_miterlimit, &to->stroke_miterlimit, SP_STYLE_FLAG_IFDIFF);
2291 /** \todo fixme: */
2292 if (from->stroke_dasharray_set) {
2293 if (from->stroke_dasharray_inherit) {
2294 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:inherit;");
2295 } else if (from->stroke_dash.n_dash && from->stroke_dash.dash) {
2296 p += g_snprintf(p, c + BMAX - p, "stroke-dasharray:");
2297 for (gint i = 0; i < from->stroke_dash.n_dash; i++) {
2298 Inkscape::CSSOStringStream os;
2299 if (i) {
2300 os << ", ";
2301 }
2302 os << from->stroke_dash.dash[i];
2303 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2304 }
2305 p += g_snprintf(p, c + BMAX - p, ";");
2306 }
2307 }
2308 /* fixme: */
2309 if (from->stroke_dashoffset_set) {
2310 Inkscape::CSSOStringStream os;
2311 os << "stroke-dashoffset:" << from->stroke_dash.offset << ";";
2312 p += g_strlcpy(p, os.str().c_str(), c + BMAX - p);
2313 }
2314 p += sp_style_write_iscale24(p, c + BMAX - p, "stroke-opacity", &from->stroke_opacity, &to->stroke_opacity, SP_STYLE_FLAG_IFDIFF);
2316 /* markers */
2317 marker_status("sp_style_write_difference: Writing markers");
2318 if (from->marker[SP_MARKER_LOC].value != NULL) {
2319 p += g_snprintf(p, c + BMAX - p, "marker:%s;", from->marker[SP_MARKER_LOC].value);
2320 }
2321 if (from->marker[SP_MARKER_LOC_START].value != NULL) {
2322 p += g_snprintf(p, c + BMAX - p, "marker-start:%s;", from->marker[SP_MARKER_LOC_START].value);
2323 }
2324 if (from->marker[SP_MARKER_LOC_MID].value != NULL) {
2325 p += g_snprintf(p, c + BMAX - p, "marker-mid:%s;", from->marker[SP_MARKER_LOC_MID].value);
2326 }
2327 if (from->marker[SP_MARKER_LOC_END].value != NULL) {
2328 p += g_snprintf(p, c + BMAX - p, "marker-end:%s;", from->marker[SP_MARKER_LOC_END].value);
2329 }
2331 p += sp_style_write_ienum(p, c + BMAX - p, "visibility", enum_visibility, &from->visibility, &to->visibility, SP_STYLE_FLAG_IFSET);
2332 p += sp_style_write_ienum(p, c + BMAX - p, "display", enum_display, &from->display, &to->display, SP_STYLE_FLAG_IFSET);
2333 p += sp_style_write_ienum(p, c + BMAX - p, "overflow", enum_overflow, &from->overflow, &to->overflow, SP_STYLE_FLAG_IFSET);
2335 /* filter: */
2336 p += sp_style_write_ifilter(p, c + BMAX - p, "filter", &from->filter, &to->filter, SP_STYLE_FLAG_IFDIFF);
2338 p += sp_text_style_write(p, c + BMAX - p, from->text, SP_STYLE_FLAG_IFDIFF);
2340 /** \todo
2341 * The reason we use IFSET rather than IFDIFF is the belief that the IFDIFF
2342 * flag is mainly only for attributes that don't handle explicit unset well.
2343 * We may need to revisit the behaviour of this routine.
2344 */
2346 /* Get rid of trailing `;'. */
2347 if (p != c) {
2348 --p;
2349 if (*p == ';') {
2350 *p = '\0';
2351 }
2352 }
2354 return g_strdup(c);
2355 }
2359 /**
2360 * Reset all style properties.
2361 */
2362 static void
2363 sp_style_clear(SPStyle *style)
2364 {
2365 g_return_if_fail(style != NULL);
2367 sp_style_paint_clear(style, &style->fill);
2368 sp_style_paint_clear(style, &style->stroke);
2369 if (style->stroke_dash.dash) {
2370 g_free(style->stroke_dash.dash);
2371 }
2373 /** \todo fixme: Do that text manipulation via parents */
2374 SPObject *object = style->object;
2375 gint const refcount = style->refcount;
2376 SPTextStyle *text = style->text;
2377 unsigned const text_private = style->text_private;
2378 memset(style, 0, sizeof(SPStyle));
2379 style->refcount = refcount;
2380 style->object = object;
2381 style->text = text;
2382 style->text_private = text_private;
2383 /* fixme: */
2384 style->text->font.set = FALSE;
2385 style->text->font_family.set = FALSE;
2387 style->font_size.set = FALSE;
2388 style->font_size.type = SP_FONT_SIZE_LITERAL;
2389 style->font_size.value = SP_CSS_FONT_SIZE_MEDIUM;
2390 style->font_size.computed = 12.0;
2391 style->font_style.set = FALSE;
2392 style->font_style.value = style->font_style.computed = SP_CSS_FONT_STYLE_NORMAL;
2393 style->font_variant.set = FALSE;
2394 style->font_variant.value = style->font_variant.computed = SP_CSS_FONT_VARIANT_NORMAL;
2395 style->font_weight.set = FALSE;
2396 style->font_weight.value = SP_CSS_FONT_WEIGHT_NORMAL;
2397 style->font_weight.computed = SP_CSS_FONT_WEIGHT_400;
2398 style->font_stretch.set = FALSE;
2399 style->font_stretch.value = style->font_stretch.computed = SP_CSS_FONT_STRETCH_NORMAL;
2401 /* text */
2402 style->text_indent.set = FALSE;
2403 style->text_indent.unit = SP_CSS_UNIT_NONE;
2404 style->text_indent.computed = 0.0;
2406 style->text_align.set = FALSE;
2407 style->text_align.value = style->text_align.computed = SP_CSS_TEXT_ALIGN_START;
2409 style->text_decoration.set = FALSE;
2410 style->text_decoration.underline = FALSE;
2411 style->text_decoration.overline = FALSE;
2412 style->text_decoration.line_through = FALSE;
2413 style->text_decoration.blink = FALSE;
2415 style->line_height.set = FALSE;
2416 style->line_height.unit = SP_CSS_UNIT_PERCENT;
2417 style->line_height.normal = TRUE;
2418 style->line_height.value = style->line_height.computed = 1.0;
2420 style->letter_spacing.set = FALSE;
2421 style->letter_spacing.unit = SP_CSS_UNIT_NONE;
2422 style->letter_spacing.normal = TRUE;
2423 style->letter_spacing.value = style->letter_spacing.computed = 0.0;
2425 style->word_spacing.set = FALSE;
2426 style->word_spacing.unit = SP_CSS_UNIT_NONE;
2427 style->word_spacing.normal = TRUE;
2428 style->word_spacing.value = style->word_spacing.computed = 0.0;
2430 style->text_transform.set = FALSE;
2431 style->text_transform.value = style->text_transform.computed = SP_CSS_TEXT_TRANSFORM_NONE;
2433 style->direction.set = FALSE;
2434 style->direction.value = style->direction.computed = SP_CSS_DIRECTION_LTR;
2436 style->block_progression.set = FALSE;
2437 style->block_progression.value = style->block_progression.computed = SP_CSS_BLOCK_PROGRESSION_TB;
2439 style->writing_mode.set = FALSE;
2440 style->writing_mode.value = style->writing_mode.computed = SP_CSS_WRITING_MODE_LR_TB;
2443 style->text_anchor.set = FALSE;
2444 style->text_anchor.value = style->text_anchor.computed = SP_CSS_TEXT_ANCHOR_START;
2447 style->opacity.value = SP_SCALE24_MAX;
2448 style->visibility.set = FALSE;
2449 style->visibility.value = style->visibility.computed = SP_CSS_VISIBILITY_VISIBLE;
2450 style->display.set = FALSE;
2451 style->display.value = style->display.computed = SP_CSS_DISPLAY_INLINE;
2452 style->overflow.set = FALSE;
2453 style->overflow.value = style->overflow.computed = SP_CSS_OVERFLOW_VISIBLE;
2455 style->color.type = SP_PAINT_TYPE_COLOR;
2456 sp_color_set_rgb_float(&style->color.value.color, 0.0, 0.0, 0.0);
2458 style->fill.type = SP_PAINT_TYPE_COLOR;
2459 sp_color_set_rgb_float(&style->fill.value.color, 0.0, 0.0, 0.0);
2460 style->fill_opacity.value = SP_SCALE24_MAX;
2461 style->fill_rule.value = style->fill_rule.computed = SP_WIND_RULE_NONZERO;
2463 style->stroke.type = SP_PAINT_TYPE_NONE;
2464 style->stroke.set = FALSE;
2465 sp_color_set_rgb_float(&style->stroke.value.color, 0.0, 0.0, 0.0);
2466 style->stroke_opacity.value = SP_SCALE24_MAX;
2468 style->stroke_width.set = FALSE;
2469 style->stroke_width.unit = SP_CSS_UNIT_NONE;
2470 style->stroke_width.computed = 1.0;
2472 style->stroke_linecap.set = FALSE;
2473 style->stroke_linecap.value = style->stroke_linecap.computed = SP_STROKE_LINECAP_BUTT;
2474 style->stroke_linejoin.set = FALSE;
2475 style->stroke_linejoin.value = style->stroke_linejoin.computed = SP_STROKE_LINEJOIN_MITER;
2477 style->stroke_miterlimit.set = FALSE;
2478 style->stroke_miterlimit.value = 4.0;
2480 style->stroke_dash.n_dash = 0;
2481 style->stroke_dash.dash = NULL;
2482 style->stroke_dash.offset = 0.0;
2484 for (unsigned i = SP_MARKER_LOC; i < SP_MARKER_LOC_QTY; i++) {
2485 g_free(style->marker[i].value);
2486 style->marker[i].set = FALSE;
2487 }
2489 style->filter.set = FALSE;
2490 //Are these really needed?
2491 style->filter.inherit = FALSE;
2492 style->filter.uri = NULL;
2493 style->filter.filter = FALSE;
2495 }
2499 /**
2500 *
2501 */
2502 static void
2503 sp_style_read_dash(SPStyle *style, gchar const *str)
2504 {
2505 /* Ref: http://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty */
2506 style->stroke_dasharray_set = TRUE;
2508 if (strcmp(str, "inherit") == 0) {
2509 style->stroke_dasharray_inherit = true;
2510 return;
2511 }
2512 style->stroke_dasharray_inherit = false;
2514 NRVpathDash &dash = style->stroke_dash;
2515 g_free(dash.dash);
2516 dash.dash = NULL;
2518 if (strcmp(str, "none") == 0) {
2519 dash.n_dash = 0;
2520 return;
2521 }
2523 gint n_dash = 0;
2524 gdouble d[64];
2525 gchar *e = NULL;
2527 bool LineSolid=true;
2528 while (e != str && n_dash < 64) {
2529 /* TODO: Should allow <length> rather than just a unitless (px) number. */
2530 d[n_dash] = g_ascii_strtod(str, (char **) &e);
2531 if (d[n_dash] > 0.00000001)
2532 LineSolid = false;
2533 if (e != str) {
2534 n_dash += 1;
2535 str = e;
2536 }
2537 while (str && *str && !isalnum(*str)) str += 1;
2538 }
2540 if (LineSolid) {
2541 dash.n_dash = 0;
2542 return;
2543 }
2545 if (n_dash > 0) {
2546 dash.dash = g_new(gdouble, n_dash);
2547 memcpy(dash.dash, d, sizeof(gdouble) * n_dash);
2548 dash.n_dash = n_dash;
2549 }
2550 }
2553 /*#########################
2554 ## SPTextStyle operations
2555 #########################*/
2558 /**
2559 * Return new SPTextStyle object with default settings.
2560 */
2561 static SPTextStyle *
2562 sp_text_style_new()
2563 {
2564 SPTextStyle *ts = g_new0(SPTextStyle, 1);
2565 ts->refcount = 1;
2566 sp_text_style_clear(ts);
2568 ts->font.value = g_strdup("Bitstream Vera Sans");
2569 ts->font_family.value = g_strdup("Bitstream Vera Sans");
2571 return ts;
2572 }
2575 /**
2576 * Clear text style settings.
2577 */
2578 static void
2579 sp_text_style_clear(SPTextStyle *ts)
2580 {
2581 ts->font.set = FALSE;
2582 ts->font_family.set = FALSE;
2583 }
2587 /**
2588 * Reduce refcount of text style and possibly free it.
2589 */
2590 static SPTextStyle *
2591 sp_text_style_unref(SPTextStyle *st)
2592 {
2593 st->refcount -= 1;
2595 if (st->refcount < 1) {
2596 g_free(st->font.value);
2597 g_free(st->font_family.value);
2598 g_free(st);
2599 }
2601 return NULL;
2602 }
2606 /**
2607 * Return duplicate of text style.
2608 */
2609 static SPTextStyle *
2610 sp_text_style_duplicate_unset(SPTextStyle *st)
2611 {
2612 SPTextStyle *nt = g_new0(SPTextStyle, 1);
2613 nt->refcount = 1;
2615 nt->font.value = g_strdup(st->font.value);
2616 nt->font_family.value = g_strdup(st->font_family.value);
2618 return nt;
2619 }
2623 /**
2624 * Write SPTextStyle object into string.
2625 */
2626 static guint
2627 sp_text_style_write(gchar *p, guint const len, SPTextStyle const *const st, guint flags)
2628 {
2629 gint d = 0;
2631 // We do not do diffing for text style
2632 if (flags == SP_STYLE_FLAG_IFDIFF)
2633 flags = SP_STYLE_FLAG_IFSET;
2635 d += sp_style_write_istring(p + d, len - d, "font-family", &st->font_family, NULL, flags);
2636 return d;
2637 }
2641 /* The following sp_tyle_read_* functions ignore invalid values, as per
2642 * http://www.w3.org/TR/REC-CSS2/syndata.html#parsing-errors.
2643 *
2644 * [However, the SVG spec is somewhat unclear as to whether the style attribute should
2645 * be handled as per CSS2 rules or whether it must simply be a set of PROPERTY:VALUE
2646 * pairs, in which case SVG's error-handling rules
2647 * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing should instead be applied.]
2648 */
2651 /**
2652 * Set SPIFloat object from string.
2653 */
2654 static void
2655 sp_style_read_ifloat(SPIFloat *val, gchar const *str)
2656 {
2657 if (!strcmp(str, "inherit")) {
2658 val->set = TRUE;
2659 val->inherit = TRUE;
2660 } else {
2661 gfloat value;
2662 if (sp_svg_number_read_f(str, &value)) {
2663 val->set = TRUE;
2664 val->inherit = FALSE;
2665 val->value = value;
2666 }
2667 }
2668 }
2672 /**
2673 * Set SPIScale24 object from string.
2674 */
2675 static void
2676 sp_style_read_iscale24(SPIScale24 *val, gchar const *str)
2677 {
2678 if (!strcmp(str, "inherit")) {
2679 val->set = TRUE;
2680 val->inherit = TRUE;
2681 } else {
2682 gfloat value;
2683 if (sp_svg_number_read_f(str, &value)) {
2684 val->set = TRUE;
2685 val->inherit = FALSE;
2686 value = CLAMP(value, 0.0f, (gfloat) SP_SCALE24_MAX);
2687 val->value = SP_SCALE24_FROM_FLOAT(value);
2688 }
2689 }
2690 }
2692 /**
2693 * Reads a style value and performs lookup based on the given style value enumerations.
2694 */
2695 static void
2696 sp_style_read_ienum(SPIEnum *val, gchar const *str, SPStyleEnum const *dict,
2697 bool const can_explicitly_inherit)
2698 {
2699 if ( can_explicitly_inherit && !strcmp(str, "inherit") ) {
2700 val->set = TRUE;
2701 val->inherit = TRUE;
2702 } else {
2703 for (unsigned i = 0; dict[i].key; i++) {
2704 if (!strcmp(str, dict[i].key)) {
2705 val->set = TRUE;
2706 val->inherit = FALSE;
2707 val->value = dict[i].value;
2708 /* Save copying for values not needing it */
2709 val->computed = val->value;
2710 break;
2711 }
2712 }
2713 }
2714 }
2718 /**
2719 * Set SPIString object from string.
2720 */
2721 static void
2722 sp_style_read_istring(SPIString *val, gchar const *str)
2723 {
2724 g_free(val->value);
2726 if (!strcmp(str, "inherit")) {
2727 val->set = TRUE;
2728 val->inherit = TRUE;
2729 val->value = NULL;
2730 } else {
2731 val->set = TRUE;
2732 val->inherit = FALSE;
2733 val->value = g_strdup(str);
2734 }
2735 }
2739 /**
2740 * Set SPILength object from string.
2741 */
2742 static void
2743 sp_style_read_ilength(SPILength *val, gchar const *str)
2744 {
2745 if (!strcmp(str, "inherit")) {
2746 val->set = TRUE;
2747 val->inherit = TRUE;
2748 } else {
2749 gdouble value;
2750 gchar *e;
2751 /** \todo fixme: Move this to standard place (Lauris) */
2752 value = g_ascii_strtod(str, &e);
2753 if ((gchar const *) e != str) {
2754 /** \todo
2755 * Allow the number of px per inch to vary (document preferences,
2756 * X server or whatever). E.g. don't fill in computed here, do
2757 * it at the same time as percentage units are done.
2758 */
2759 if (!*e) {
2760 /* Userspace */
2761 val->unit = SP_CSS_UNIT_NONE;
2762 val->computed = value;
2763 } else if (!strcmp(e, "px")) {
2764 /* Userspace */
2765 val->unit = SP_CSS_UNIT_PX;
2766 val->computed = value;
2767 } else if (!strcmp(e, "pt")) {
2768 /* Userspace / DEVICESCALE */
2769 val->unit = SP_CSS_UNIT_PT;
2770 val->computed = value * PX_PER_PT;
2771 } else if (!strcmp(e, "pc")) {
2772 /* 1 pica = 12pt; FIXME: add it to SPUnit */
2773 val->unit = SP_CSS_UNIT_PC;
2774 val->computed = value * PX_PER_PT * 12;
2775 } else if (!strcmp(e, "mm")) {
2776 val->unit = SP_CSS_UNIT_MM;
2777 val->computed = value * PX_PER_MM;
2778 } else if (!strcmp(e, "cm")) {
2779 val->unit = SP_CSS_UNIT_CM;
2780 val->computed = value * PX_PER_CM;
2781 } else if (!strcmp(e, "in")) {
2782 val->unit = SP_CSS_UNIT_IN;
2783 val->computed = value * PX_PER_IN;
2784 } else if (!strcmp(e, "em")) {
2785 /* EM square */
2786 val->unit = SP_CSS_UNIT_EM;
2787 val->value = value;
2788 } else if (!strcmp(e, "ex")) {
2789 /* ex square */
2790 val->unit = SP_CSS_UNIT_EX;
2791 val->value = value;
2792 } else if (!strcmp(e, "%")) {
2793 /* Percentage */
2794 val->unit = SP_CSS_UNIT_PERCENT;
2795 val->value = value * 0.01;
2796 } else {
2797 /* Invalid */
2798 return;
2799 }
2800 val->set = TRUE;
2801 val->inherit = FALSE;
2802 }
2803 }
2804 }
2806 /**
2807 * Set SPILengthOrNormal object from string.
2808 */
2809 static void
2810 sp_style_read_ilengthornormal(SPILengthOrNormal *val, gchar const *str)
2811 {
2812 if (!strcmp(str, "normal")) {
2813 val->set = TRUE;
2814 val->inherit = FALSE;
2815 val->normal = TRUE;
2816 val->unit = SP_CSS_UNIT_NONE;
2817 val->value = val->computed = 0.0;
2818 } else {
2819 SPILength length;
2820 sp_style_read_ilength(&length, str);
2821 val->set = length.set;
2822 val->inherit = length.inherit;
2823 val->normal = FALSE;
2824 val->unit = length.unit;
2825 val->value = length.value;
2826 val->computed = length.computed;
2827 }
2828 }
2830 /**
2831 * Set SPITextDecoration object from string.
2832 */
2833 static void
2834 sp_style_read_itextdecoration(SPITextDecoration *val, gchar const *str)
2835 {
2836 if (!strcmp(str, "inherit")) {
2837 val->set = TRUE;
2838 val->inherit = TRUE;
2839 } else if (!strcmp(str, "none")) {
2840 val->set = TRUE;
2841 val->inherit = FALSE;
2842 val->underline = FALSE;
2843 val->overline = FALSE;
2844 val->line_through = FALSE;
2845 val->blink = FALSE;
2846 } else {
2847 bool found_underline = false;
2848 bool found_overline = false;
2849 bool found_line_through = false;
2850 bool found_blink = false;
2851 for ( ; *str ; str++ ) {
2852 if (*str == ' ') continue;
2853 if (strneq(str, "underline", 9) && (str[9] == ' ' || str[9] == '\0')) {
2854 found_underline = true;
2855 str += 9;
2856 } else if (strneq(str, "overline", 8) && (str[8] == ' ' || str[8] == '\0')) {
2857 found_overline = true;
2858 str += 8;
2859 } else if (strneq(str, "line-through", 12) && (str[12] == ' ' || str[12] == '\0')) {
2860 found_line_through = true;
2861 str += 12;
2862 } else if (strneq(str, "blink", 5) && (str[5] == ' ' || str[5] == '\0')) {
2863 found_blink = true;
2864 str += 5;
2865 } else {
2866 return; // invalid value
2867 }
2868 }
2869 if (!(found_underline || found_overline || found_line_through || found_blink)) {
2870 return; // invalid value: empty
2871 }
2872 val->set = TRUE;
2873 val->inherit = FALSE;
2874 val->underline = found_underline;
2875 val->overline = found_overline;
2876 val->line_through = found_line_through;
2877 val->blink = found_blink;
2878 }
2879 }
2881 /**
2882 * Set SPIPaint object from string containing an integer value.
2883 * \param document Ignored
2884 */
2885 static void
2886 sp_style_read_icolor(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2887 {
2888 paint->currentcolor = FALSE; /* currentColor not a valid <color>. */
2889 if (!strcmp(str, "inherit")) {
2890 paint->set = TRUE;
2891 paint->inherit = TRUE;
2892 } else {
2893 guint32 const rgb0 = sp_svg_read_color(str, 0xff);
2894 if (rgb0 != 0xff) {
2895 paint->type = SP_PAINT_TYPE_COLOR;
2896 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2897 paint->set = TRUE;
2898 paint->inherit = FALSE;
2899 }
2900 }
2901 }
2904 /**
2905 * Set SPIPaint object from string.
2906 *
2907 * \pre paint == \&style.fill || paint == \&style.stroke.
2908 */
2909 static void
2910 sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocument *document)
2911 {
2912 while (isspace(*str)) {
2913 ++str;
2914 }
2916 if (streq(str, "inherit")) {
2917 paint->set = TRUE;
2918 paint->inherit = TRUE;
2919 paint->currentcolor = FALSE;
2920 } else if (streq(str, "currentColor") && paint != &style->color) {
2921 paint->set = TRUE;
2922 paint->inherit = FALSE;
2923 paint->currentcolor = TRUE;
2924 } else if (streq(str, "none") && paint != &style->color) {
2925 paint->type = SP_PAINT_TYPE_NONE;
2926 paint->set = TRUE;
2927 paint->inherit = FALSE;
2928 paint->currentcolor = FALSE;
2929 } else if (strneq(str, "url", 3) && paint != &style->color) {
2930 // this is alloc'd uri, but seems to be shared with a parent
2931 // potentially, so it's not any easy g_free case...
2932 paint->value.paint.uri = extract_uri(str);
2933 if (paint->value.paint.uri == NULL || *(paint->value.paint.uri) == '\0') {
2934 paint->type = SP_PAINT_TYPE_NONE;
2935 return;
2936 }
2937 paint->type = SP_PAINT_TYPE_PAINTSERVER;
2938 paint->set = TRUE;
2939 paint->inherit = FALSE;
2940 paint->currentcolor = FALSE;
2941 if (document) {
2942 SPObject *ps = sp_uri_reference_resolve(document, str);
2943 if (ps && SP_IS_PAINT_SERVER(ps)) {
2944 paint->value.paint.server = SP_PAINT_SERVER(ps);
2945 if (style->object && !style->cloned) {
2946 sp_object_href(SP_OBJECT(paint->value.paint.server), style);
2947 if (paint == &style->fill) {
2948 style->fill_hreffed = true;
2949 } else {
2950 assert(paint == &style->stroke);
2951 style->stroke_hreffed = true;
2952 }
2953 }
2954 if (style->object || style->cloned) {
2955 SPObject *server = paint->value.paint.server;
2956 sigc::connection release_connection
2957 = server->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_paint_server_release), style));
2958 sigc::connection modified_connection
2959 = server->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_paint_server_modified), style));
2960 if (paint == &style->fill) {
2961 style->fill_release_connection = release_connection;
2962 style->fill_modified_connection = modified_connection;
2963 } else {
2964 assert(paint == &style->stroke);
2965 style->stroke_release_connection = release_connection;
2966 style->stroke_modified_connection = modified_connection;
2967 }
2968 }
2969 } else {
2970 paint->value.paint.server = NULL;
2971 }
2972 }
2973 } else {
2974 guint32 const rgb0 = sp_svg_read_color(str, &str, 0xff);
2975 if (rgb0 != 0xff) {
2976 paint->type = SP_PAINT_TYPE_COLOR;
2977 sp_color_set_rgb_rgba32(&paint->value.color, rgb0);
2978 paint->set = TRUE;
2979 paint->inherit = FALSE;
2980 paint->currentcolor = FALSE;
2982 while (g_ascii_isspace(*str)) {
2983 ++str;
2984 }
2985 if (strneq(str, "icc-color(", 10)) {
2986 SVGICCColor* tmp = new SVGICCColor();
2987 if ( ! sp_svg_read_icc_color( str, &str, tmp ) ) {
2988 delete tmp;
2989 tmp = 0;
2990 }
2991 paint->iccColor = tmp;
2992 }
2993 }
2994 }
2995 }
2999 /**
3000 * Set SPIFontSize object from string.
3001 */
3002 static void
3003 sp_style_read_ifontsize(SPIFontSize *val, gchar const *str)
3004 {
3005 if (!strcmp(str, "inherit")) {
3006 val->set = TRUE;
3007 val->inherit = TRUE;
3008 } else if ((*str == 'x') || (*str == 's') || (*str == 'm') || (*str == 'l')) {
3009 for (unsigned i = 0; enum_font_size[i].key; i++) {
3010 if (!strcmp(str, enum_font_size[i].key)) {
3011 val->set = TRUE;
3012 val->inherit = FALSE;
3013 val->type = SP_FONT_SIZE_LITERAL;
3014 val->value = enum_font_size[i].value;
3015 return;
3016 }
3017 }
3018 /* Invalid */
3019 return;
3020 } else {
3021 gdouble value;
3022 gchar *e;
3023 /* fixme: Move this to standard place (Lauris) */
3024 value = g_ascii_strtod(str, &e);
3025 if ((gchar const *) e != str) {
3026 if (!*e) {
3027 /* Userspace */
3028 } else if (!strcmp(e, "px")) {
3029 /* Userspace */
3030 } else if (!strcmp(e, "pt")) {
3031 /* Userspace * DEVICESCALE */
3032 value *= PX_PER_PT;
3033 } else if (!strcmp(e, "pc")) {
3034 /* 12pt */
3035 value *= PX_PER_PT * 12.0;
3036 } else if (!strcmp(e, "mm")) {
3037 value *= PX_PER_MM;
3038 } else if (!strcmp(e, "cm")) {
3039 value *= PX_PER_CM;
3040 } else if (!strcmp(e, "in")) {
3041 value *= PX_PER_IN;
3042 } else if (!strcmp(e, "%")) {
3043 /* Percentage */
3044 val->set = TRUE;
3045 val->inherit = FALSE;
3046 val->type = SP_FONT_SIZE_PERCENTAGE;
3047 val->value = SP_F8_16_FROM_FLOAT(value / 100.0);
3048 return;
3049 } else {
3050 /* Invalid */
3051 return;
3052 }
3053 /* Length */
3054 val->set = TRUE;
3055 val->inherit = FALSE;
3056 val->type = SP_FONT_SIZE_LENGTH;
3057 val->computed = value;
3058 return;
3059 }
3060 }
3061 }
3065 /**
3066 * Set SPIFilter object from string.
3067 */
3068 static void
3069 sp_style_read_ifilter(SPIFilter *f, gchar const *str, SPDocument *document)
3070 {
3071 /* Try all possible values: inherit, none, uri */
3072 if (streq(str, "inherit")) {
3073 f->set = TRUE;
3074 f->inherit = TRUE;
3075 f->filter = NULL;
3076 } else if(streq(str, "none")) {
3077 f->set = TRUE;
3078 f->inherit = FALSE;
3079 f->filter = NULL;
3080 } else if (strneq(str, "url", 3)) {
3081 f->uri = extract_uri(str);
3082 if(f->uri == NULL || f->uri[0] == '\0') {
3083 g_warning("Specified filter url is empty");
3084 f->set = TRUE;
3085 f->inherit = FALSE;
3086 f->filter = NULL;
3087 return;
3088 }
3089 f->set = TRUE;
3090 f->inherit = FALSE;
3091 f->filter = NULL;
3092 if (document) {
3093 SPObject *obj;
3094 obj = sp_uri_reference_resolve(document, str);
3095 if (SP_IS_FILTER(obj)) {
3096 f->filter = SP_FILTER(obj);
3097 //g_signal_connect(G_OBJECT(f->filter), "release",
3098 // G_CALLBACK(sp_style_filter_release), style);
3099 //g_signal_connect(G_OBJECT(f->filter), "modified",
3100 // G_CALLBACK(sp_style_filter_modified), style);
3101 } else {
3102 g_warning("Element '%s' not found or is not a filter", f->uri);
3103 }
3104 }
3106 } else {
3107 /* We shouldn't reach this if SVG input is well-formed */
3108 f->set = FALSE;
3109 f->inherit = FALSE;
3110 f->filter = NULL;
3111 f->uri = NULL;
3112 }
3113 }
3115 /**
3116 * Set SPIEnum object from repr attribute.
3117 */
3118 static void
3119 sp_style_read_penum(SPIEnum *val, Inkscape::XML::Node *repr,
3120 gchar const *key, SPStyleEnum const *dict,
3121 bool const can_explicitly_inherit)
3122 {
3123 gchar const *str = repr->attribute(key);
3124 if (str) {
3125 sp_style_read_ienum(val, str, dict, can_explicitly_inherit);
3126 }
3127 }
3131 /**
3132 * Set SPILength object from repr attribute.
3133 */
3134 static void
3135 sp_style_read_plength(SPILength *val, Inkscape::XML::Node *repr, gchar const *key)
3136 {
3137 gchar const *str = repr->attribute(key);
3138 if (str) {
3139 sp_style_read_ilength(val, str);
3140 }
3141 }
3143 /**
3144 * Set SPIFontSize object from repr attribute.
3145 */
3146 static void
3147 sp_style_read_pfontsize(SPIFontSize *val, Inkscape::XML::Node *repr, gchar const *key)
3148 {
3149 gchar const *str = repr->attribute(key);
3150 if (str) {
3151 sp_style_read_ifontsize(val, str);
3152 }
3153 }
3156 /**
3157 * Set SPIFloat object from repr attribute.
3158 */
3159 static void
3160 sp_style_read_pfloat(SPIFloat *val, Inkscape::XML::Node *repr, gchar const *key)
3161 {
3162 gchar const *str = repr->attribute(key);
3163 if (str) {
3164 sp_style_read_ifloat(val, str);
3165 }
3166 }
3169 /**
3170 * Write SPIFloat object into string.
3171 */
3172 static gint
3173 sp_style_write_ifloat(gchar *p, gint const len, gchar const *const key,
3174 SPIFloat const *const val, SPIFloat const *const base, guint const flags)
3175 {
3176 Inkscape::CSSOStringStream os;
3178 if ((flags & SP_STYLE_FLAG_ALWAYS)
3179 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3180 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3181 && (!base->set || (val->value != base->value))))
3182 {
3183 if (val->inherit) {
3184 return g_snprintf(p, len, "%s:inherit;", key);
3185 } else {
3186 os << key << ":" << val->value << ";";
3187 return g_strlcpy(p, os.str().c_str(), len);
3188 }
3189 }
3190 return 0;
3191 }
3194 /**
3195 * Write SPIScale24 object into string.
3196 */
3197 static gint
3198 sp_style_write_iscale24(gchar *p, gint const len, gchar const *const key,
3199 SPIScale24 const *const val, SPIScale24 const *const base,
3200 guint const flags)
3201 {
3202 Inkscape::CSSOStringStream os;
3204 if ((flags & SP_STYLE_FLAG_ALWAYS)
3205 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3206 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3207 && (!base->set || (val->value != base->value))))
3208 {
3209 if (val->inherit) {
3210 return g_snprintf(p, len, "%s:inherit;", key);
3211 } else {
3212 os << key << ":" << SP_SCALE24_TO_FLOAT(val->value) << ";";
3213 return g_strlcpy(p, os.str().c_str(), len);
3214 }
3215 }
3216 return 0;
3217 }
3220 /**
3221 * Write SPIEnum object into string.
3222 */
3223 static gint
3224 sp_style_write_ienum(gchar *p, gint const len, gchar const *const key,
3225 SPStyleEnum const *const dict,
3226 SPIEnum const *const val, SPIEnum const *const base, guint const flags)
3227 {
3228 if ((flags & SP_STYLE_FLAG_ALWAYS)
3229 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3230 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3231 && (!base->set || (val->computed != base->computed))))
3232 {
3233 if (val->inherit) {
3234 return g_snprintf(p, len, "%s:inherit;", key);
3235 }
3236 for (unsigned i = 0; dict[i].key; i++) {
3237 if (dict[i].value == static_cast< gint > (val->value) ) {
3238 return g_snprintf(p, len, "%s:%s;", key, dict[i].key);
3239 }
3240 }
3241 }
3242 return 0;
3243 }
3247 /**
3248 * Write SPIString object into string.
3249 */
3250 static gint
3251 sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
3252 SPIString const *const val, SPIString const *const base, guint const flags)
3253 {
3254 if ((flags & SP_STYLE_FLAG_ALWAYS)
3255 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3256 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3257 && (!base->set || strcmp(val->value, base->value))))
3258 {
3259 if (val->inherit) {
3260 return g_snprintf(p, len, "%s:inherit;", key);
3261 } else {
3262 return g_snprintf(p, len, "%s:%s;", key, val->value);
3263 }
3264 }
3265 return 0;
3266 }
3269 /**
3270 *
3271 */
3272 static bool
3273 sp_length_differ(SPILength const *const a, SPILength const *const b)
3274 {
3275 if (a->unit != b->unit) {
3276 if (a->unit == SP_CSS_UNIT_EM) return true;
3277 if (a->unit == SP_CSS_UNIT_EX) return true;
3278 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3279 if (b->unit == SP_CSS_UNIT_EM) return true;
3280 if (b->unit == SP_CSS_UNIT_EX) return true;
3281 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3282 }
3284 return (a->computed != b->computed);
3285 }
3289 /**
3290 * Write SPILength object into string.
3291 */
3292 static gint
3293 sp_style_write_ilength(gchar *p, gint const len, gchar const *const key,
3294 SPILength const *const val, SPILength const *const base, guint const flags)
3295 {
3296 Inkscape::CSSOStringStream os;
3298 if ((flags & SP_STYLE_FLAG_ALWAYS)
3299 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3300 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3301 && (!base->set || sp_length_differ(val, base))))
3302 {
3303 if (val->inherit) {
3304 return g_snprintf(p, len, "%s:inherit;", key);
3305 } else {
3306 switch (val->unit) {
3307 case SP_CSS_UNIT_NONE:
3308 os << key << ":" << val->computed << ";";
3309 return g_strlcpy(p, os.str().c_str(), len);
3310 break;
3311 case SP_CSS_UNIT_PX:
3312 os << key << ":" << val->computed << "px;";
3313 return g_strlcpy(p, os.str().c_str(), len);
3314 break;
3315 case SP_CSS_UNIT_PT:
3316 os << key << ":" << val->computed * PT_PER_PX << "pt;";
3317 return g_strlcpy(p, os.str().c_str(), len);
3318 break;
3319 case SP_CSS_UNIT_PC:
3320 os << key << ":" << val->computed * PT_PER_PX / 12.0 << "pc;";
3321 return g_strlcpy(p, os.str().c_str(), len);
3322 break;
3323 case SP_CSS_UNIT_MM:
3324 os << key << ":" << val->computed * MM_PER_PX << "mm;";
3325 return g_strlcpy(p, os.str().c_str(), len);
3326 break;
3327 case SP_CSS_UNIT_CM:
3328 os << key << ":" << val->computed * CM_PER_PX << "cm;";
3329 return g_strlcpy(p, os.str().c_str(), len);
3330 break;
3331 case SP_CSS_UNIT_IN:
3332 os << key << ":" << val->computed * IN_PER_PX << "in;";
3333 return g_strlcpy(p, os.str().c_str(), len);
3334 break;
3335 case SP_CSS_UNIT_EM:
3336 os << key << ":" << val->value << "em;";
3337 return g_strlcpy(p, os.str().c_str(), len);
3338 break;
3339 case SP_CSS_UNIT_EX:
3340 os << key << ":" << val->value << "ex;";
3341 return g_strlcpy(p, os.str().c_str(), len);
3342 break;
3343 case SP_CSS_UNIT_PERCENT:
3344 os << key << ":" << (val->value * 100.0) << "%;";
3345 return g_strlcpy(p, os.str().c_str(), len);
3346 break;
3347 default:
3348 /* Invalid */
3349 break;
3350 }
3351 }
3352 }
3353 return 0;
3354 }
3357 /**
3358 *
3359 */
3360 static bool
3361 sp_lengthornormal_differ(SPILengthOrNormal const *const a, SPILengthOrNormal const *const b)
3362 {
3363 if (a->normal != b->normal) return true;
3364 if (a->normal) return false;
3366 if (a->unit != b->unit) {
3367 if (a->unit == SP_CSS_UNIT_EM) return true;
3368 if (a->unit == SP_CSS_UNIT_EX) return true;
3369 if (a->unit == SP_CSS_UNIT_PERCENT) return true;
3370 if (b->unit == SP_CSS_UNIT_EM) return true;
3371 if (b->unit == SP_CSS_UNIT_EX) return true;
3372 if (b->unit == SP_CSS_UNIT_PERCENT) return true;
3373 }
3375 return (a->computed != b->computed);
3376 }
3378 /**
3379 * Write SPILengthOrNormal object into string.
3380 */
3381 static gint
3382 sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const *const key,
3383 SPILengthOrNormal const *const val,
3384 SPILengthOrNormal const *const base,
3385 guint const flags)
3386 {
3387 if ((flags & SP_STYLE_FLAG_ALWAYS)
3388 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3389 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3390 && (!base->set || sp_lengthornormal_differ(val, base))))
3391 {
3392 if (val->normal) {
3393 return g_snprintf(p, len, "%s:normal;", key);
3394 } else {
3395 SPILength length;
3396 length.set = val->set;
3397 length.inherit = val->inherit;
3398 length.unit = val->unit;
3399 length.value = val->value;
3400 length.computed = val->computed;
3401 return sp_style_write_ilength(p, len, key, &length, NULL, SP_STYLE_FLAG_ALWAYS);
3402 }
3403 }
3404 return 0;
3405 }
3407 /**
3408 *
3409 */
3410 static bool
3411 sp_textdecoration_differ(SPITextDecoration const *const a, SPITextDecoration const *const b)
3412 {
3413 return a->underline != b->underline
3414 || a->overline != b->overline
3415 || a->line_through != b->line_through
3416 || a->blink != b->blink;
3417 }
3419 /**
3420 * Write SPITextDecoration object into string.
3421 */
3422 static gint
3423 sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key,
3424 SPITextDecoration const *const val,
3425 SPITextDecoration const *const base,
3426 guint const flags)
3427 {
3428 Inkscape::CSSOStringStream os;
3430 if ((flags & SP_STYLE_FLAG_ALWAYS)
3431 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3432 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3433 && (!base->set || sp_textdecoration_differ(val, base))))
3434 {
3435 if (val->inherit) {
3436 return g_snprintf(p, len, "%s:inherit;", key);
3437 } else {
3438 os << key << ":";
3439 if (val->underline || val->overline || val->line_through || val->blink) {
3440 if (val->underline) os << " underline";
3441 if (val->overline) os << " overline";
3442 if (val->line_through) os << " line-through";
3443 if (val->blink) os << " blink";
3444 } else
3445 os << "none";
3446 os << ";";
3447 return g_strlcpy(p, os.str().c_str(), len);
3448 }
3449 }
3450 return 0;
3451 }
3453 /**
3454 *
3455 */
3456 static bool
3457 sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
3458 {
3459 if (a->type != b->type)
3460 return true;
3461 if (a->type == SP_PAINT_TYPE_COLOR)
3462 return !(sp_color_is_equal(&a->value.color, &b->value.color)
3463 && ((a->iccColor == b->iccColor)
3464 || (a->iccColor && b->iccColor
3465 && (a->iccColor->colorProfile == b->iccColor->colorProfile)
3466 && (a->iccColor->colors == b->iccColor->colors))));
3467 /* todo: Allow for epsilon differences in iccColor->colors, e.g. changes small enough not to show up
3468 * in the string representation. */
3469 if (a->type == SP_PAINT_TYPE_PAINTSERVER)
3470 return (a->value.paint.server != b->value.paint.server);
3471 return false;
3472 }
3476 /**
3477 * Write SPIPaint object into string.
3478 */
3479 static gint
3480 sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
3481 SPIPaint const *const paint, SPIPaint const *const base, guint const flags)
3482 {
3483 if ((flags & SP_STYLE_FLAG_ALWAYS)
3484 || ((flags & SP_STYLE_FLAG_IFSET) && paint->set)
3485 || ((flags & SP_STYLE_FLAG_IFDIFF) && paint->set
3486 && (!base->set || sp_paint_differ(paint, base))))
3487 {
3488 if (paint->inherit) {
3489 return g_snprintf(b, len, "%s:inherit;", key);
3490 } else if (paint->currentcolor) {
3491 return g_snprintf(b, len, "%s:currentColor;", key);
3492 } else {
3493 switch (paint->type) {
3494 case SP_PAINT_TYPE_COLOR: {
3495 char color_buf[8];
3496 sp_svg_write_color(color_buf, sizeof(color_buf), sp_color_get_rgba32_ualpha(&paint->value.color, 0));
3497 if (paint->iccColor) {
3498 CSSOStringStream css;
3499 css << color_buf << " icc-color(" << paint->iccColor->colorProfile;
3500 for (vector<double>::const_iterator i(paint->iccColor->colors.begin()),
3501 iEnd(paint->iccColor->colors.end());
3502 i != iEnd; ++i) {
3503 css << ", " << *i;
3504 }
3505 css << ')';
3506 return g_snprintf(b, len, "%s:%s;", key, css.gcharp());
3507 } else {
3508 return g_snprintf(b, len, "%s:%s;", key, color_buf);
3509 }
3510 }
3511 case SP_PAINT_TYPE_PAINTSERVER:
3512 return g_snprintf(b, len, "%s:url(%s);", key, paint->value.paint.uri);
3513 default:
3514 break;
3515 }
3516 return g_snprintf(b, len, "%s:none;", key);
3517 }
3518 }
3519 return 0;
3520 }
3523 /**
3524 *
3525 */
3526 static bool
3527 sp_fontsize_differ(SPIFontSize const *const a, SPIFontSize const *const b)
3528 {
3529 if (a->type != b->type)
3530 return true;
3531 if (a->type == SP_FONT_SIZE_LENGTH) {
3532 if (a->computed != b->computed)
3533 return true;
3534 } else {
3535 if (a->value != b->value)
3536 return true;
3537 }
3538 return false;
3539 }
3542 /**
3543 * Write SPIFontSize object into string.
3544 */
3545 static gint
3546 sp_style_write_ifontsize(gchar *p, gint const len, gchar const *key,
3547 SPIFontSize const *const val, SPIFontSize const *const base,
3548 guint const flags)
3549 {
3550 if ((flags & SP_STYLE_FLAG_ALWAYS)
3551 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3552 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set
3553 && (!base->set || sp_fontsize_differ(val, base))))
3554 {
3555 if (val->inherit) {
3556 return g_snprintf(p, len, "%s:inherit;", key);
3557 } else if (val->type == SP_FONT_SIZE_LITERAL) {
3558 for (unsigned i = 0; enum_font_size[i].key; i++) {
3559 if (enum_font_size[i].value == static_cast< gint > (val->value) ) {
3560 return g_snprintf(p, len, "%s:%s;", key, enum_font_size[i].key);
3561 }
3562 }
3563 } else if (val->type == SP_FONT_SIZE_LENGTH) {
3564 Inkscape::CSSOStringStream os;
3565 os << key << ":" << val->computed << "px;"; // must specify px, see inkscape bug 1221626, mozilla bug 234789
3566 return g_strlcpy(p, os.str().c_str(), len);
3567 } else if (val->type == SP_FONT_SIZE_PERCENTAGE) {
3568 Inkscape::CSSOStringStream os;
3569 os << key << ":" << (SP_F8_16_TO_FLOAT(val->value) * 100.0) << "%;";
3570 return g_strlcpy(p, os.str().c_str(), len);
3571 }
3572 }
3573 return 0;
3574 }
3577 /**
3578 * Write SPIFilter object into string.
3579 */
3580 static gint
3581 sp_style_write_ifilter(gchar *p, gint const len, gchar const *key,
3582 SPIFilter const *const val, SPIFilter const *const base,
3583 guint const flags)
3584 {
3585 if ((flags & SP_STYLE_FLAG_ALWAYS)
3586 || ((flags & SP_STYLE_FLAG_IFSET) && val->set)
3587 || ((flags & SP_STYLE_FLAG_IFDIFF) && val->set))
3588 {
3589 if (val->inherit) {
3590 return g_snprintf(p, len, "%s:inherit;", key);
3591 } else if (val->uri) {
3592 return g_snprintf(p, len, "%s:url(%s);", key, val->uri);
3593 }
3594 }
3597 return 0;
3598 }
3601 /**
3602 * Clear paint object, and disconnect style from paintserver (if present).
3603 */
3604 static void
3605 sp_style_paint_clear(SPStyle *style, SPIPaint *paint)
3606 {
3607 if ((paint->type == SP_PAINT_TYPE_PAINTSERVER) && paint->value.paint.server) {
3608 if (paint == &style->fill) {
3609 if (style->fill_hreffed) {
3610 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3611 style->fill_hreffed = false;
3612 }
3613 style->fill_release_connection.disconnect();
3614 style->fill_modified_connection.disconnect();
3615 } else {
3616 assert(paint == &style->stroke); // Only fill & stroke can have a paint server.
3617 if (style->stroke_hreffed) {
3618 sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
3619 style->stroke_hreffed = false;
3620 }
3621 style->stroke_release_connection.disconnect();
3622 style->stroke_modified_connection.disconnect();
3623 }
3625 paint->value.paint.server = NULL;
3626 }
3627 paint->value.paint.uri = NULL;
3628 paint->type = SP_PAINT_TYPE_NONE;
3629 delete paint->iccColor;
3630 paint->iccColor = NULL;
3631 }
3633 /**
3634 * Clear all style property attributes in object.
3635 */
3636 void
3637 sp_style_unset_property_attrs(SPObject *o)
3638 {
3639 if (!o) return;
3641 SPStyle *style = SP_OBJECT_STYLE(o);
3642 if (!style) return;
3644 Inkscape::XML::Node *repr = SP_OBJECT_REPR(o);
3645 if (!repr) return;
3647 if (style->opacity.set) {
3648 repr->setAttribute("opacity", NULL);
3649 }
3650 if (style->color.set) {
3651 repr->setAttribute("color", NULL);
3652 }
3653 if (style->fill.set) {
3654 repr->setAttribute("fill", NULL);
3655 }
3656 if (style->fill_opacity.set) {
3657 repr->setAttribute("fill-opacity", NULL);
3658 }
3659 if (style->fill_rule.set) {
3660 repr->setAttribute("fill-rule", NULL);
3661 }
3662 if (style->stroke.set) {
3663 repr->setAttribute("stroke", NULL);
3664 }
3665 if (style->stroke_width.set) {
3666 repr->setAttribute("stroke-width", NULL);
3667 }
3668 if (style->stroke_linecap.set) {
3669 repr->setAttribute("stroke-linecap", NULL);
3670 }
3671 if (style->stroke_linejoin.set) {
3672 repr->setAttribute("stroke-linejoin", NULL);
3673 }
3674 if (style->marker[SP_MARKER_LOC].set) {
3675 repr->setAttribute("marker", NULL);
3676 }
3677 if (style->marker[SP_MARKER_LOC_START].set) {
3678 repr->setAttribute("marker-start", NULL);
3679 }
3680 if (style->marker[SP_MARKER_LOC_MID].set) {
3681 repr->setAttribute("marker-mid", NULL);
3682 }
3683 if (style->marker[SP_MARKER_LOC_END].set) {
3684 repr->setAttribute("marker-end", NULL);
3685 }
3686 if (style->stroke_opacity.set) {
3687 repr->setAttribute("stroke-opacity", NULL);
3688 }
3689 if (style->stroke_dasharray_set) {
3690 repr->setAttribute("stroke-dasharray", NULL);
3691 }
3692 if (style->stroke_dashoffset_set) {
3693 repr->setAttribute("stroke-dashoffset", NULL);
3694 }
3695 if (style->text_private && style->text->font_family.set) {
3696 repr->setAttribute("font-family", NULL);
3697 }
3698 if (style->text_anchor.set) {
3699 repr->setAttribute("text-anchor", NULL);
3700 }
3701 if (style->writing_mode.set) {
3702 repr->setAttribute("writing_mode", NULL);
3703 }
3704 if (style->filter.set) {
3705 repr->setAttribute("filter", NULL);
3706 }
3707 }
3709 /**
3710 * \pre style != NULL.
3711 * \pre flags in {IFSET, ALWAYS}.
3712 */
3713 SPCSSAttr *
3714 sp_css_attr_from_style(SPStyle const *const style, guint const flags)
3715 {
3716 g_return_val_if_fail(style != NULL, NULL);
3717 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3718 (flags == SP_STYLE_FLAG_ALWAYS) ),
3719 NULL);
3720 gchar *style_str = sp_style_write_string(style, flags);
3721 SPCSSAttr *css = sp_repr_css_attr_new();
3722 sp_repr_css_attr_add_from_string(css, style_str);
3723 g_free(style_str);
3724 return css;
3725 }
3728 /**
3729 * \pre object != NULL
3730 * \pre flags in {IFSET, ALWAYS}.
3731 */
3732 SPCSSAttr *
3733 sp_css_attr_from_object(SPObject *object, guint const flags)
3734 {
3735 g_return_val_if_fail(((flags == SP_STYLE_FLAG_IFSET) ||
3736 (flags == SP_STYLE_FLAG_ALWAYS) ),
3737 NULL);
3738 SPStyle const *const style = SP_OBJECT_STYLE(object);
3739 if (style == NULL)
3740 return NULL;
3741 return sp_css_attr_from_style(style, flags);
3742 }
3744 /**
3745 * Unset any text-related properties
3746 */
3747 SPCSSAttr *
3748 sp_css_attr_unset_text(SPCSSAttr *css)
3749 {
3750 sp_repr_css_set_property(css, "font", NULL); // not implemented yet
3751 sp_repr_css_set_property(css, "font-size", NULL);
3752 sp_repr_css_set_property(css, "font-size-adjust", NULL); // not implemented yet
3753 sp_repr_css_set_property(css, "font-style", NULL);
3754 sp_repr_css_set_property(css, "font-variant", NULL);
3755 sp_repr_css_set_property(css, "font-weight", NULL);
3756 sp_repr_css_set_property(css, "font-stretch", NULL);
3757 sp_repr_css_set_property(css, "font-family", NULL);
3758 sp_repr_css_set_property(css, "text-indent", NULL);
3759 sp_repr_css_set_property(css, "text-align", NULL);
3760 sp_repr_css_set_property(css, "text-decoration", NULL);
3761 sp_repr_css_set_property(css, "line-height", NULL);
3762 sp_repr_css_set_property(css, "letter-spacing", NULL);
3763 sp_repr_css_set_property(css, "word-spacing", NULL);
3764 sp_repr_css_set_property(css, "text-transform", NULL);
3765 sp_repr_css_set_property(css, "direction", NULL);
3766 sp_repr_css_set_property(css, "block-progression", NULL);
3767 sp_repr_css_set_property(css, "writing-mode", NULL);
3768 sp_repr_css_set_property(css, "text-anchor", NULL);
3769 sp_repr_css_set_property(css, "kerning", NULL); // not implemented yet
3770 sp_repr_css_set_property(css, "dominant-baseline", NULL); // not implemented yet
3771 sp_repr_css_set_property(css, "alignment-baseline", NULL); // not implemented yet
3772 sp_repr_css_set_property(css, "baseline-shift", NULL); // not implemented yet
3774 return css;
3775 }
3777 bool
3778 is_url(char const *p)
3779 {
3780 if (p == NULL)
3781 return false;
3782 /** \todo
3783 * FIXME: I'm not sure if this applies to SVG as well, but CSS2 says any URIs
3784 * in property values must start with 'url('.
3785 */
3786 return (g_ascii_strncasecmp(p, "url(", 4) == 0);
3787 }
3789 /**
3790 * Unset any properties that contain URI values.
3791 *
3792 * Used for storing style that will be reused across documents when carrying
3793 * the referenced defs is impractical.
3794 */
3795 SPCSSAttr *
3796 sp_css_attr_unset_uris(SPCSSAttr *css)
3797 {
3798 // All properties that may hold <uri> or <paint> according to SVG 1.1
3799 if (is_url(sp_repr_css_property(css, "clip-path", NULL))) sp_repr_css_set_property(css, "clip-path", NULL);
3800 if (is_url(sp_repr_css_property(css, "color-profile", NULL))) sp_repr_css_set_property(css, "color-profile", NULL);
3801 if (is_url(sp_repr_css_property(css, "cursor", NULL))) sp_repr_css_set_property(css, "cursor", NULL);
3802 if (is_url(sp_repr_css_property(css, "filter", NULL))) sp_repr_css_set_property(css, "filter", NULL);
3803 if (is_url(sp_repr_css_property(css, "marker-start", NULL))) sp_repr_css_set_property(css, "marker-start", NULL);
3804 if (is_url(sp_repr_css_property(css, "marker-mid", NULL))) sp_repr_css_set_property(css, "marker-mid", NULL);
3805 if (is_url(sp_repr_css_property(css, "marker-end", NULL))) sp_repr_css_set_property(css, "marker-end", NULL);
3806 if (is_url(sp_repr_css_property(css, "mask", NULL))) sp_repr_css_set_property(css, "mask", NULL);
3807 if (is_url(sp_repr_css_property(css, "fill", NULL))) sp_repr_css_set_property(css, "fill", NULL);
3808 if (is_url(sp_repr_css_property(css, "stroke", NULL))) sp_repr_css_set_property(css, "stroke", NULL);
3810 return css;
3811 }
3813 /**
3814 * Scale a single-value property.
3815 */
3816 void
3817 sp_css_attr_scale_property_single(SPCSSAttr *css, gchar const *property,
3818 double ex, bool only_with_units = false)
3819 {
3820 gchar const *w = sp_repr_css_property(css, property, NULL);
3821 if (w) {
3822 gchar *units = NULL;
3823 double wd = g_ascii_strtod(w, &units) * ex;
3824 if (w == units) {// nothing converted, non-numeric value
3825 return;
3826 }
3827 if (only_with_units && (units == NULL || *units == '\0' || *units == '%')) {
3828 // only_with_units, but no units found, so do nothing.
3829 return;
3830 }
3831 Inkscape::CSSOStringStream os;
3832 os << wd << units; // reattach units
3833 sp_repr_css_set_property(css, property, os.str().c_str());
3834 }
3835 }
3837 /**
3838 * Scale a list-of-values property.
3839 */
3840 void
3841 sp_css_attr_scale_property_list(SPCSSAttr *css, gchar const *property, double ex)
3842 {
3843 gchar const *string = sp_repr_css_property(css, property, NULL);
3844 if (string) {
3845 Inkscape::CSSOStringStream os;
3846 gchar **a = g_strsplit(string, ",", 10000);
3847 bool first = true;
3848 for (gchar **i = a; i != NULL; i++) {
3849 gchar *w = *i;
3850 if (w == NULL)
3851 break;
3852 gchar *units = NULL;
3853 double wd = g_ascii_strtod(w, &units) * ex;
3854 if (w == units) {// nothing converted, non-numeric value ("none" or "inherit"); do nothing
3855 g_strfreev(a);
3856 return;
3857 }
3858 if (!first) {
3859 os << ",";
3860 }
3861 os << wd << units; // reattach units
3862 first = false;
3863 }
3864 sp_repr_css_set_property(css, property, os.str().c_str());
3865 g_strfreev(a);
3866 }
3867 }
3869 /**
3870 * Scale any properties that may hold <length> by ex.
3871 */
3872 SPCSSAttr *
3873 sp_css_attr_scale(SPCSSAttr *css, double ex)
3874 {
3875 sp_css_attr_scale_property_single(css, "baseline-shift", ex);
3876 sp_css_attr_scale_property_single(css, "stroke-width", ex);
3877 sp_css_attr_scale_property_list (css, "stroke-dasharray", ex);
3878 sp_css_attr_scale_property_single(css, "stroke-dashoffset", ex);
3879 sp_css_attr_scale_property_single(css, "font-size", ex);
3880 sp_css_attr_scale_property_single(css, "kerning", ex);
3881 sp_css_attr_scale_property_single(css, "letter-spacing", ex);
3882 sp_css_attr_scale_property_single(css, "word-spacing", ex);
3883 sp_css_attr_scale_property_single(css, "line-height", ex, true);
3885 return css;
3886 }
3889 /**
3890 * Remove quotes from SPIString object value.
3891 *
3892 * \todo FIXME: now used for font family, but perhaps this should apply to
3893 * ALL strings (check CSS spec), in which case this should be part of
3894 * read_istring.
3895 */
3896 static void
3897 css2_unescape_unquote(SPIString *val)
3898 {
3899 if (val->set && val->value && strlen(val->value) >= 2) {
3901 /// \todo unescape all \-escaped chars
3903 int l = strlen(val->value);
3904 if ( ( val->value[0] == '"' && val->value[l - 1] == '"' ) ||
3905 ( val->value[0] == '\'' && val->value[l - 1] == '\'' ) ) {
3906 memcpy(val->value, val->value + 1, l - 2);
3907 val->value[l - 2] = '\0';
3908 }
3909 }
3910 }
3913 /*
3914 Local Variables:
3915 mode:c++
3916 c-file-style:"stroustrup"
3917 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
3918 indent-tabs-mode:nil
3919 fill-column:99
3920 End:
3921 */
3922 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :