3a547bfb90b2e6431782690a8b86a1dd5feab940
1 #ifndef __SP_STYLE_H__
2 #define __SP_STYLE_H__
4 /** \file
5 * SPStyle - a style object for SPItem objects
6 *
7 * Authors:
8 * Lauris Kaplinski <lauris@kaplinski.com>
9 *
10 * Copyright (C) 2001-2002 Lauris Kaplinski
11 * Copyright (C) 2001 Ximian, Inc.
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #include "color.h"
17 #include "forward.h"
18 #include "sp-marker-loc.h"
19 #include "sp-filter.h"
20 #include "sp-filter-reference.h"
21 #include "uri-references.h"
22 #include "uri.h"
23 #include "sp-paint-server.h"
25 #include <sigc++/connection.h>
27 namespace Inkscape {
28 namespace XML {
29 class Node;
30 }
31 }
33 class SPCSSAttr;
35 class SPIFloat;
36 class SPIScale24;
37 class SPIInt;
38 class SPIShort;
39 class SPIEnum;
40 class SPIString;
41 class SPILength;
42 class SPIPaint;
43 class SPIFontSize;
45 /// Float type internal to SPStyle.
46 struct SPIFloat {
47 unsigned set : 1;
48 unsigned inherit : 1;
49 unsigned data : 30;
50 float value;
51 };
53 /*
54 * One might think that the best value for SP_SCALE24_MAX would be ((1<<24)-1), which allows the
55 * greatest possible precision for fitting [0, 1] fractions into 24 bits.
56 *
57 * However, in practice, that gives a problem with 0.5, which falls half way between two fractions
58 * of ((1<<24)-1). What's worse is that casting double(1<<23) / ((1<<24)-1) to float on x86
59 * produces wrong rounding behaviour, resulting in a fraction of ((1<<23)+2.0f) / (1<<24) rather
60 * than ((1<<23)+1.0f) / (1<<24) as one would expect, let alone ((1<<23)+0.0f) / (1<<24) as one
61 * would ideally like for this example.
62 *
63 * The value (1<<23) is thus best if one considers float conversions alone.
64 *
65 * The value 0xff0000 can exactly represent all 8-bit alpha channel values,
66 * and can exactly represent all multiples of 0.1. I haven't yet tested whether
67 * rounding bugs still get in the way of conversions to & from float, but my instinct is that
68 * it's fairly safe because 0xff fits three times inside float's significand.
69 *
70 * We should probably use the value 0xffff00 once we support 16 bits per channel and/or LittleCMS,
71 * though that might need to be accompanied by greater use of double instead of float for
72 * colours and opacities, to be safe from rounding bugs.
73 */
74 #define SP_SCALE24_MAX (0xff0000)
75 #define SP_SCALE24_TO_FLOAT(v) ((double) (v) / SP_SCALE24_MAX)
76 #define SP_SCALE24_FROM_FLOAT(v) unsigned(((v) * SP_SCALE24_MAX) + .5)
78 /** Returns a scale24 for the product of two scale24 values. */
79 #define SP_SCALE24_MUL(_v1, _v2) unsigned((double)(_v1) * (_v2) / SP_SCALE24_MAX + .5)
81 /// 24 bit data type internal to SPStyle.
82 struct SPIScale24 {
83 unsigned set : 1;
84 unsigned inherit : 1;
85 unsigned value : 24;
86 };
88 /// Int type internal to SPStyle.
89 struct SPIInt {
90 unsigned set : 1;
91 unsigned inherit : 1;
92 unsigned data : 30;
93 int value;
94 };
96 /// Short type internal to SPStyle.
97 struct SPIShort {
98 unsigned set : 1;
99 unsigned inherit : 1;
100 unsigned data : 14;
101 int value : 16;
102 };
104 /// Enum type internal to SPStyle.
105 struct SPIEnum {
106 unsigned set : 1;
107 unsigned inherit : 1;
108 unsigned value : 8;
109 unsigned computed : 8;
110 };
112 /// String type internal to SPStyle.
113 struct SPIString {
114 unsigned set : 1;
115 unsigned inherit : 1;
116 unsigned data : 30;
117 gchar *value;
118 };
120 enum {
121 SP_CSS_UNIT_NONE,
122 SP_CSS_UNIT_PX,
123 SP_CSS_UNIT_PT,
124 SP_CSS_UNIT_PC,
125 SP_CSS_UNIT_MM,
126 SP_CSS_UNIT_CM,
127 SP_CSS_UNIT_IN,
128 SP_CSS_UNIT_EM,
129 SP_CSS_UNIT_EX,
130 SP_CSS_UNIT_PERCENT
131 };
133 /// Length type internal to SPStyle.
134 struct SPILength {
135 unsigned set : 1;
136 unsigned inherit : 1;
137 unsigned unit : 4;
138 float value;
139 float computed;
140 };
142 #define SP_STYLE_FILL_SERVER(s) (((SPStyle *) (s))->getFillPaintServer())
143 #define SP_STYLE_STROKE_SERVER(s) (((SPStyle *) (s))->getStrokePaintServer())
144 #define SP_OBJECT_STYLE_FILL_SERVER(o) (SP_OBJECT (o)->style->getFillPaintServer())
145 #define SP_OBJECT_STYLE_STROKE_SERVER(o) (SP_OBJECT (o)->style->getStrokePaintServer())
147 enum {
148 SP_PAINT_TYPE_NONE,
149 SP_PAINT_TYPE_COLOR,
150 SP_PAINT_TYPE_PAINTSERVER,
151 SP_PAINT_TYPE_IMPOSSIBLE
152 };
154 class SVGICCColor;
156 /// Paint type internal to SPStyle.
157 struct SPIPaint {
158 unsigned set : 1;
159 unsigned inherit : 1;
160 unsigned currentcolor : 1;
161 unsigned type : 2;
162 unsigned int colorSet : 1;
163 unsigned int noneSet : 1;
164 struct {
165 SPPaintServerReference *href;
166 SPColor color;
167 SVGICCColor *iccColor;
168 } value;
169 };
171 /// Filter type internal to SPStyle
172 struct SPIFilter {
173 unsigned set : 1;
174 unsigned inherit : 1;
175 SPFilterReference *href;
176 };
178 enum {
179 SP_FONT_SIZE_LITERAL,
180 SP_FONT_SIZE_LENGTH,
181 SP_FONT_SIZE_PERCENTAGE
182 };
184 #define SP_FONT_SIZE ((1 << 24) - 1)
186 #define SP_F8_16_TO_FLOAT(v) ((gdouble) (v) / (1 << 16))
187 #define SP_F8_16_FROM_FLOAT(v) ((int) ((v) * ((1 << 16) + 0.9999)))
189 #define SP_STYLE_FLAG_IFSET (1 << 0)
190 #define SP_STYLE_FLAG_IFDIFF (1 << 1)
191 #define SP_STYLE_FLAG_ALWAYS (1 << 2)
193 /// Fontsize type internal to SPStyle.
194 struct SPIFontSize {
195 unsigned set : 1;
196 unsigned inherit : 1;
197 unsigned type : 2;
198 unsigned value : 24;
199 float computed;
200 };
202 /// Text decoration type internal to SPStyle.
203 struct SPITextDecoration {
204 unsigned set : 1;
205 unsigned inherit : 1;
206 unsigned underline : 1;
207 unsigned overline : 1;
208 unsigned line_through : 1;
209 unsigned blink : 1; // "Conforming user agents are not required to support this value." yay!
210 };
212 /// Extended length type internal to SPStyle.
213 struct SPILengthOrNormal {
214 unsigned set : 1;
215 unsigned inherit : 1;
216 unsigned normal : 1;
217 unsigned unit : 4;
218 float value;
219 float computed;
220 };
222 class SPTextStyle;
224 /// Stroke dash details.
225 class NRVpathDash {
226 public:
227 double offset;
228 int n_dash;
229 double *dash;
230 };
232 /// An SVG style object.
233 struct SPStyle {
234 int refcount;
236 /** Object we are attached to */
237 SPObject *object;
238 /** Document we are associated with */
239 SPDocument *document;
241 /** Our text style component */
242 SPTextStyle *text;
243 unsigned text_private : 1;
245 /* CSS2 */
246 /* Font */
247 /** Size of the font */
248 SPIFontSize font_size;
249 /** Style of the font */
250 SPIEnum font_style;
251 /** Which substyle of the font */
252 SPIEnum font_variant;
253 /** Weight of the font */
254 SPIEnum font_weight;
255 /** Stretch of the font */
256 SPIEnum font_stretch;
258 /** First line indent of paragraphs (css2 16.1) */
259 SPILength text_indent;
260 /** text alignment (css2 16.2) (not to be confused with text-anchor) */
261 SPIEnum text_align;
262 /** text decoration (css2 16.3.1) */
263 SPITextDecoration text_decoration;
264 // 16.3.2 is text-shadow. That's complicated.
265 /** Line spacing (css2 10.8.1) */
266 SPILengthOrNormal line_height;
267 /** letter spacing (css2 16.4) */
268 SPILengthOrNormal letter_spacing;
269 /** word spacing (also css2 16.4) */
270 SPILengthOrNormal word_spacing;
271 /** capitalization (css2 16.5) */
272 SPIEnum text_transform;
274 /* CSS3 Text */
275 /** text direction (css3 text 3.2) */
276 SPIEnum direction;
277 /** block progression (css3 text 3.2) */
278 SPIEnum block_progression;
279 /** Writing mode (css3 text 3.2 and svg1.1 10.7.2) */
280 SPIEnum writing_mode;
282 /* SVG */
283 /** Anchor of the text (svg1.1 10.9.1) */
284 SPIEnum text_anchor;
286 /* Misc attributes */
287 unsigned clip_set : 1;
288 unsigned color_set : 1;
289 unsigned cursor_set : 1;
290 unsigned overflow_set : 1;
291 unsigned clip_path_set : 1;
292 unsigned clip_rule_set : 1;
293 unsigned mask_set : 1;
295 /** display */
296 SPIEnum display;
298 /** overflow */
299 SPIEnum overflow;
301 /** visibility */
302 SPIEnum visibility;
304 /** opacity */
305 SPIScale24 opacity;
307 /** color */
308 SPIPaint color;
310 /** fill */
311 SPIPaint fill;
312 /** fill-opacity */
313 SPIScale24 fill_opacity;
314 /** fill-rule: 0 nonzero, 1 evenodd */
315 SPIEnum fill_rule;
317 /** stroke */
318 SPIPaint stroke;
319 /** stroke-width */
320 SPILength stroke_width;
321 /** stroke-linecap */
322 SPIEnum stroke_linecap;
323 /** stroke-linejoin */
324 SPIEnum stroke_linejoin;
325 /** stroke-miterlimit */
326 SPIFloat stroke_miterlimit;
327 /** stroke-dash* */
328 NRVpathDash stroke_dash;
329 unsigned stroke_dasharray_set : 1;
330 unsigned stroke_dasharray_inherit : 1;
331 unsigned stroke_dashoffset_set : 1;
332 /** stroke-opacity */
333 SPIScale24 stroke_opacity;
335 /** Marker list */
336 SPIString marker[SP_MARKER_LOC_QTY];
338 /** Filter effect */
339 SPIFilter filter;
341 SPIEnum filter_blend_mode;
343 /** normally not used, but duplicates the Gaussian blur deviation (if any) from the attached
344 filter when the style is used for querying */
345 SPILength filter_gaussianBlur_deviation;
347 /** enable-background, used for defining where filter effects get
348 * their background image */
349 SPIEnum enable_background;
351 /// style belongs to a cloned object
352 bool cloned;
354 sigc::connection release_connection;
356 sigc::connection filter_modified_connection;
357 sigc::connection fill_ps_modified_connection;
358 sigc::connection stroke_ps_modified_connection;
360 SPObject *getFilter() {if (filter.href) return filter.href->getObject(); else return NULL;}
361 const gchar *getFilterURI() {if (filter.href) return filter.href->getURI()->toString(); else return NULL;}
362 SPPaintServer *getFillPaintServer() {if (fill.value.href) return fill.value.href->getObject(); else return NULL;}
363 const gchar *getFillURI() {if (fill.value.href) return fill.value.href->getURI()->toString(); else return NULL;}
364 SPPaintServer *getStrokePaintServer() {if (stroke.value.href) return stroke.value.href->getObject(); else return NULL;}
365 const gchar *getStrokeURI() {if (stroke.value.href) return stroke.value.href->getURI()->toString(); else return NULL;}
366 };
368 SPStyle *sp_style_new(SPDocument *document);
370 SPStyle *sp_style_new_from_object(SPObject *object);
372 SPStyle *sp_style_ref(SPStyle *style);
374 SPStyle *sp_style_unref(SPStyle *style);
376 void sp_style_read_from_object(SPStyle *style, SPObject *object);
378 void sp_style_read_from_repr(SPStyle *style, Inkscape::XML::Node *repr);
380 void sp_style_merge_from_style_string(SPStyle *style, gchar const *p);
382 void sp_style_merge_from_parent(SPStyle *style, SPStyle const *parent);
384 void sp_style_merge_from_dying_parent(SPStyle *style, SPStyle const *parent);
386 gchar *sp_style_write_string(SPStyle const *style, guint flags = SP_STYLE_FLAG_IFSET);
388 gchar *sp_style_write_difference(SPStyle const *from, SPStyle const *to);
390 void sp_style_set_to_uri_string (SPStyle *style, bool isfill, const gchar *uri);
392 /* SPTextStyle */
394 enum SPCSSFontSize {
395 SP_CSS_FONT_SIZE_XX_SMALL,
396 SP_CSS_FONT_SIZE_X_SMALL,
397 SP_CSS_FONT_SIZE_SMALL,
398 SP_CSS_FONT_SIZE_MEDIUM,
399 SP_CSS_FONT_SIZE_LARGE,
400 SP_CSS_FONT_SIZE_X_LARGE,
401 SP_CSS_FONT_SIZE_XX_LARGE,
402 SP_CSS_FONT_SIZE_SMALLER,
403 SP_CSS_FONT_SIZE_LARGER
404 };
406 enum SPCSSFontStyle {
407 SP_CSS_FONT_STYLE_NORMAL,
408 SP_CSS_FONT_STYLE_ITALIC,
409 SP_CSS_FONT_STYLE_OBLIQUE
410 };
412 enum SPCSSFontVariant {
413 SP_CSS_FONT_VARIANT_NORMAL,
414 SP_CSS_FONT_VARIANT_SMALL_CAPS
415 };
417 enum SPCSSFontWeight {
418 SP_CSS_FONT_WEIGHT_100,
419 SP_CSS_FONT_WEIGHT_200,
420 SP_CSS_FONT_WEIGHT_300,
421 SP_CSS_FONT_WEIGHT_400,
422 SP_CSS_FONT_WEIGHT_500,
423 SP_CSS_FONT_WEIGHT_600,
424 SP_CSS_FONT_WEIGHT_700,
425 SP_CSS_FONT_WEIGHT_800,
426 SP_CSS_FONT_WEIGHT_900,
427 SP_CSS_FONT_WEIGHT_NORMAL,
428 SP_CSS_FONT_WEIGHT_BOLD,
429 SP_CSS_FONT_WEIGHT_LIGHTER,
430 SP_CSS_FONT_WEIGHT_BOLDER
431 };
433 enum SPCSSFontStretch {
434 SP_CSS_FONT_STRETCH_ULTRA_CONDENSED,
435 SP_CSS_FONT_STRETCH_EXTRA_CONDENSED,
436 SP_CSS_FONT_STRETCH_CONDENSED,
437 SP_CSS_FONT_STRETCH_SEMI_CONDENSED,
438 SP_CSS_FONT_STRETCH_NORMAL,
439 SP_CSS_FONT_STRETCH_SEMI_EXPANDED,
440 SP_CSS_FONT_STRETCH_EXPANDED,
441 SP_CSS_FONT_STRETCH_EXTRA_EXPANDED,
442 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
443 SP_CSS_FONT_STRETCH_NARROWER,
444 SP_CSS_FONT_STRETCH_WIDER
445 };
447 enum SPCSSTextAlign {
448 SP_CSS_TEXT_ALIGN_START,
449 SP_CSS_TEXT_ALIGN_END,
450 SP_CSS_TEXT_ALIGN_LEFT,
451 SP_CSS_TEXT_ALIGN_RIGHT,
452 SP_CSS_TEXT_ALIGN_CENTER,
453 SP_CSS_TEXT_ALIGN_JUSTIFY
454 // also <string> is allowed, but only within table calls
455 };
457 enum SPCSSTextTransform {
458 SP_CSS_TEXT_TRANSFORM_CAPITALIZE,
459 SP_CSS_TEXT_TRANSFORM_UPPERCASE,
460 SP_CSS_TEXT_TRANSFORM_LOWERCASE,
461 SP_CSS_TEXT_TRANSFORM_NONE
462 };
464 enum SPCSSDirection {
465 SP_CSS_DIRECTION_LTR,
466 SP_CSS_DIRECTION_RTL
467 };
469 enum SPCSSBlockProgression {
470 SP_CSS_BLOCK_PROGRESSION_TB,
471 SP_CSS_BLOCK_PROGRESSION_RL,
472 SP_CSS_BLOCK_PROGRESSION_LR
473 };
475 enum SPCSSWritingMode {
476 SP_CSS_WRITING_MODE_LR_TB,
477 SP_CSS_WRITING_MODE_RL_TB,
478 SP_CSS_WRITING_MODE_TB_RL,
479 SP_CSS_WRITING_MODE_TB_LR
480 };
482 enum SPTextAnchor {
483 SP_CSS_TEXT_ANCHOR_START,
484 SP_CSS_TEXT_ANCHOR_MIDDLE,
485 SP_CSS_TEXT_ANCHOR_END
486 };
488 enum SPVisibility {
489 SP_CSS_VISIBILITY_HIDDEN,
490 SP_CSS_VISIBILITY_COLLAPSE,
491 SP_CSS_VISIBILITY_VISIBLE
492 };
494 enum SPOverflow {
495 SP_CSS_OVERFLOW_VISIBLE,
496 SP_CSS_OVERFLOW_HIDDEN,
497 SP_CSS_OVERFLOW_SCROLL,
498 SP_CSS_OVERFLOW_AUTO
499 };
501 /// \todo more display types
502 enum SPCSSDisplay {
503 SP_CSS_DISPLAY_NONE,
504 SP_CSS_DISPLAY_INLINE,
505 SP_CSS_DISPLAY_BLOCK,
506 SP_CSS_DISPLAY_LIST_ITEM,
507 SP_CSS_DISPLAY_RUN_IN,
508 SP_CSS_DISPLAY_COMPACT,
509 SP_CSS_DISPLAY_MARKER,
510 SP_CSS_DISPLAY_TABLE,
511 SP_CSS_DISPLAY_INLINE_TABLE,
512 SP_CSS_DISPLAY_TABLE_ROW_GROUP,
513 SP_CSS_DISPLAY_TABLE_HEADER_GROUP,
514 SP_CSS_DISPLAY_TABLE_FOOTER_GROUP,
515 SP_CSS_DISPLAY_TABLE_ROW,
516 SP_CSS_DISPLAY_TABLE_COLUMN_GROUP,
517 SP_CSS_DISPLAY_TABLE_COLUMN,
518 SP_CSS_DISPLAY_TABLE_CELL,
519 SP_CSS_DISPLAY_TABLE_CAPTION
520 };
522 enum SPEnableBackground {
523 SP_CSS_BACKGROUND_ACCUMULATE,
524 SP_CSS_BACKGROUND_NEW
525 };
527 /// An SPTextStyle has a refcount, a font family, and a font name.
528 struct SPTextStyle {
529 int refcount;
531 /* CSS font properties */
532 SPIString font_family;
534 /** \todo fixme: The 'font' property is ugly, and not working (lauris) */
535 SPIString font;
536 };
538 SPCSSAttr *sp_css_attr_from_style (SPStyle const *const style, guint flags);
539 SPCSSAttr *sp_css_attr_from_object(SPObject *object, guint flags = SP_STYLE_FLAG_IFSET);
540 SPCSSAttr *sp_css_attr_unset_text(SPCSSAttr *css);
541 SPCSSAttr *sp_css_attr_unset_uris(SPCSSAttr *css);
542 SPCSSAttr *sp_css_attr_scale(SPCSSAttr *css, double ex);
544 void sp_style_unset_property_attrs(SPObject *o);
546 void sp_style_set_property_url (SPObject *item, gchar const *property, SPObject *linked, bool recursive);
548 gchar *attribute_unquote(gchar const *val);
549 gchar *css2_escape_quote(gchar const *val);
551 #endif
554 /*
555 Local Variables:
556 mode:c++
557 c-file-style:"stroustrup"
558 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
559 indent-tabs-mode:nil
560 fill-column:99
561 End:
562 */
563 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :