1 #ifndef SEEN_SP_STYLE_H
2 #define SEEN_SP_STYLE_H
4 /** \file
5 * SPStyle - a style object for SPItem objects
6 */
7 /* Authors:
8 * Lauris Kaplinski <lauris@kaplinski.com>
9 * Jon A. Cruz <jon@joncruz.org>
10 *
11 * Copyright (C) 2010 Jon A. Cruz
12 * Copyright (C) 2001-2002 Lauris Kaplinski
13 * Copyright (C) 2001 Ximian, Inc.
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #include "color.h"
19 #include "forward.h"
20 #include "sp-marker-loc.h"
21 #include "sp-filter.h"
22 #include "sp-filter-reference.h"
23 #include "uri-references.h"
24 #include "uri.h"
25 #include "sp-paint-server.h"
27 #include <sigc++/connection.h>
29 namespace Inkscape {
30 namespace XML {
31 class Node;
32 }
33 }
35 class SPCSSAttr;
37 class SPIFloat;
38 class SPIScale24;
39 class SPIInt;
40 class SPIShort;
41 class SPIEnum;
42 class SPIString;
43 class SPILength;
44 class SPIPaint;
45 class SPIFontSize;
46 class SPIBaselineShift;
48 /// Float type internal to SPStyle.
49 struct SPIFloat {
50 unsigned set : 1;
51 unsigned inherit : 1;
52 unsigned data : 30;
53 float value;
54 };
56 /*
57 * One might think that the best value for SP_SCALE24_MAX would be ((1<<24)-1), which allows the
58 * greatest possible precision for fitting [0, 1] fractions into 24 bits.
59 *
60 * However, in practice, that gives a problem with 0.5, which falls half way between two fractions
61 * of ((1<<24)-1). What's worse is that casting double(1<<23) / ((1<<24)-1) to float on x86
62 * produces wrong rounding behaviour, resulting in a fraction of ((1<<23)+2.0f) / (1<<24) rather
63 * than ((1<<23)+1.0f) / (1<<24) as one would expect, let alone ((1<<23)+0.0f) / (1<<24) as one
64 * would ideally like for this example.
65 *
66 * The value (1<<23) is thus best if one considers float conversions alone.
67 *
68 * The value 0xff0000 can exactly represent all 8-bit alpha channel values,
69 * and can exactly represent all multiples of 0.1. I haven't yet tested whether
70 * rounding bugs still get in the way of conversions to & from float, but my instinct is that
71 * it's fairly safe because 0xff fits three times inside float's significand.
72 *
73 * We should probably use the value 0xffff00 once we support 16 bits per channel and/or LittleCMS,
74 * though that might need to be accompanied by greater use of double instead of float for
75 * colours and opacities, to be safe from rounding bugs.
76 */
77 #define SP_SCALE24_MAX (0xff0000)
78 #define SP_SCALE24_TO_FLOAT(v) ((double) (v) / SP_SCALE24_MAX)
79 #define SP_SCALE24_FROM_FLOAT(v) unsigned(((v) * SP_SCALE24_MAX) + .5)
81 /** Returns a scale24 for the product of two scale24 values. */
82 #define SP_SCALE24_MUL(_v1, _v2) unsigned((double)(_v1) * (_v2) / SP_SCALE24_MAX + .5)
84 /// 24 bit data type internal to SPStyle.
85 struct SPIScale24 {
86 unsigned set : 1;
87 unsigned inherit : 1;
88 unsigned value : 24;
89 };
91 /// Int type internal to SPStyle.
92 struct SPIInt {
93 unsigned set : 1;
94 unsigned inherit : 1;
95 unsigned data : 30;
96 int value;
97 };
99 /// Short type internal to SPStyle.
100 struct SPIShort {
101 unsigned set : 1;
102 unsigned inherit : 1;
103 unsigned data : 14;
104 int value : 16;
105 };
107 /// Enum type internal to SPStyle.
108 struct SPIEnum {
109 unsigned set : 1;
110 unsigned inherit : 1;
111 unsigned value : 8;
112 unsigned computed : 8;
113 };
115 /// String type internal to SPStyle.
116 struct SPIString {
117 unsigned set : 1;
118 unsigned inherit : 1;
119 unsigned data : 30;
120 gchar *value;
121 };
123 enum {
124 SP_CSS_UNIT_NONE,
125 SP_CSS_UNIT_PX,
126 SP_CSS_UNIT_PT,
127 SP_CSS_UNIT_PC,
128 SP_CSS_UNIT_MM,
129 SP_CSS_UNIT_CM,
130 SP_CSS_UNIT_IN,
131 SP_CSS_UNIT_EM,
132 SP_CSS_UNIT_EX,
133 SP_CSS_UNIT_PERCENT
134 };
136 /// Length type internal to SPStyle.
137 struct SPILength {
138 unsigned set : 1;
139 unsigned inherit : 1;
140 unsigned unit : 4;
141 float value;
142 float computed;
143 };
145 #define SP_STYLE_FILL_SERVER(s) (((SPStyle *) (s))->getFillPaintServer())
146 #define SP_STYLE_STROKE_SERVER(s) (((SPStyle *) (s))->getStrokePaintServer())
148 class SVGICCColor;
150 /// Paint type internal to SPStyle.
151 struct SPIPaint {
152 unsigned set : 1;
153 unsigned inherit : 1;
154 unsigned currentcolor : 1;
155 unsigned int colorSet : 1;
156 unsigned int noneSet : 1;
157 struct {
158 SPPaintServerReference *href;
159 SPColor color;
160 } value;
162 SPIPaint();
164 bool isSet() const { return true; /* set || colorSet*/}
165 bool isSameType( SPIPaint const & other ) const {return (isPaintserver() == other.isPaintserver()) && (colorSet == other.colorSet) && (currentcolor == other.currentcolor);}
167 bool isNoneSet() const {return noneSet;}
169 bool isNone() const {return !currentcolor && !colorSet && !isPaintserver();} // TODO refine
170 bool isColor() const {return colorSet && !isPaintserver();}
171 bool isPaintserver() const {return value.href && value.href->getObject();}
173 void clear();
175 void setColor( float r, float g, float b ) {value.color.set( r, g, b ); colorSet = true;}
176 void setColor( guint32 val ) {value.color.set( val ); colorSet = true;}
177 void setColor( SPColor const& color ) {value.color = color; colorSet = true;}
179 void read( gchar const *str, SPStyle &tyle, SPDocument *document = 0);
181 private:
182 SPIPaint(SPIPaint const&);
183 SPIPaint &operator=(SPIPaint const &);
184 };
186 /// Filter type internal to SPStyle
187 struct SPIFilter {
188 unsigned set : 1;
189 unsigned inherit : 1;
190 SPFilterReference *href;
191 };
193 enum {
194 SP_FONT_SIZE_LITERAL,
195 SP_FONT_SIZE_LENGTH,
196 SP_FONT_SIZE_PERCENTAGE
197 };
199 enum {
200 SP_BASELINE_SHIFT_LITERAL,
201 SP_BASELINE_SHIFT_LENGTH,
202 SP_BASELINE_SHIFT_PERCENTAGE
203 };
205 #define SP_FONT_SIZE ((1 << 24) - 1)
207 #define SP_F8_16_TO_FLOAT(v) ((gdouble) (v) / (1 << 16))
208 #define SP_F8_16_FROM_FLOAT(v) ((int) ((v) * ((1 << 16) + 0.9999)))
210 #define SP_STYLE_FLAG_IFSET (1 << 0)
211 #define SP_STYLE_FLAG_IFDIFF (1 << 1)
212 #define SP_STYLE_FLAG_ALWAYS (1 << 2)
214 /// Fontsize type internal to SPStyle.
215 struct SPIFontSize {
216 unsigned set : 1;
217 unsigned inherit : 1;
218 unsigned type : 2;
219 unsigned value : 24;
220 float computed;
221 };
223 /// Baseline shift type internal to SPStyle.
224 struct SPIBaselineShift {
225 unsigned set : 1;
226 unsigned inherit : 1;
227 unsigned type : 2;
228 unsigned unit : 4;
229 unsigned literal: 2;
230 float value; // Can be negative
231 float computed;
232 };
234 /// Text decoration type internal to SPStyle.
235 struct SPITextDecoration {
236 unsigned set : 1;
237 unsigned inherit : 1;
238 unsigned underline : 1;
239 unsigned overline : 1;
240 unsigned line_through : 1;
241 unsigned blink : 1; // "Conforming user agents are not required to support this value." yay!
242 };
244 /// Extended length type internal to SPStyle.
245 struct SPILengthOrNormal {
246 unsigned set : 1;
247 unsigned inherit : 1;
248 unsigned normal : 1;
249 unsigned unit : 4;
250 float value;
251 float computed;
252 };
254 class SPTextStyle;
256 /// Stroke dash details.
257 class NRVpathDash {
258 public:
259 double offset;
260 int n_dash;
261 double *dash;
262 };
264 /// An SVG style object.
265 struct SPStyle {
266 int refcount;
268 /** Object we are attached to */
269 SPObject *object;
270 /** Document we are associated with */
271 SPDocument *document;
273 /** Our text style component */
274 SPTextStyle *text;
275 unsigned text_private : 1;
277 /* CSS2 */
278 /* Font */
279 /** Size of the font */
280 SPIFontSize font_size;
281 /** Style of the font */
282 SPIEnum font_style;
283 /** Which substyle of the font */
284 SPIEnum font_variant;
285 /** Weight of the font */
286 SPIEnum font_weight;
287 /** Stretch of the font */
288 SPIEnum font_stretch;
290 /** First line indent of paragraphs (css2 16.1) */
291 SPILength text_indent;
292 /** text alignment (css2 16.2) (not to be confused with text-anchor) */
293 SPIEnum text_align;
294 /** text decoration (css2 16.3.1) */
295 SPITextDecoration text_decoration;
296 // 16.3.2 is text-shadow. That's complicated.
297 /** Line spacing (css2 10.8.1) */
298 SPILengthOrNormal line_height;
299 /** letter spacing (css2 16.4) */
300 SPILengthOrNormal letter_spacing;
301 /** word spacing (also css2 16.4) */
302 SPILengthOrNormal word_spacing;
303 /** capitalization (css2 16.5) */
304 SPIEnum text_transform;
306 /* CSS3 Text */
307 /** text direction (css3 text 3.2) */
308 SPIEnum direction;
309 /** block progression (css3 text 3.2) */
310 SPIEnum block_progression;
311 /** Writing mode (css3 text 3.2 and svg1.1 10.7.2) */
312 SPIEnum writing_mode;
313 /** Baseline shift (svg1.1 10.9.2) */
314 SPIBaselineShift baseline_shift;
316 /* SVG */
317 /** Anchor of the text (svg1.1 10.9.1) */
318 SPIEnum text_anchor;
320 /* Misc attributes */
321 unsigned clip_set : 1;
322 unsigned color_set : 1;
323 unsigned cursor_set : 1;
324 unsigned overflow_set : 1;
325 unsigned clip_path_set : 1;
326 unsigned clip_rule_set : 1;
327 unsigned mask_set : 1;
329 /** display */
330 SPIEnum display;
332 /** overflow */
333 SPIEnum overflow;
335 /** visibility */
336 SPIEnum visibility;
338 /** opacity */
339 SPIScale24 opacity;
341 /** color */
342 SPIPaint color;
344 /** fill */
345 SPIPaint fill;
346 /** fill-opacity */
347 SPIScale24 fill_opacity;
348 /** fill-rule: 0 nonzero, 1 evenodd */
349 SPIEnum fill_rule;
351 /** stroke */
352 SPIPaint stroke;
353 /** stroke-width */
354 SPILength stroke_width;
355 /** stroke-linecap */
356 SPIEnum stroke_linecap;
357 /** stroke-linejoin */
358 SPIEnum stroke_linejoin;
359 /** stroke-miterlimit */
360 SPIFloat stroke_miterlimit;
361 /** stroke-dash* */
362 NRVpathDash stroke_dash;
363 unsigned stroke_dasharray_set : 1;
364 unsigned stroke_dasharray_inherit : 1;
365 unsigned stroke_dashoffset_set : 1;
366 unsigned stroke_dashoffset_inherit : 1;
367 /** stroke-opacity */
368 SPIScale24 stroke_opacity;
370 /** Marker list */
371 SPIString marker[SP_MARKER_LOC_QTY];
373 /** Filter effect */
374 SPIFilter filter;
376 SPIEnum filter_blend_mode;
378 /** normally not used, but duplicates the Gaussian blur deviation (if any) from the attached
379 filter when the style is used for querying */
380 SPILength filter_gaussianBlur_deviation;
382 /** enable-background, used for defining where filter effects get
383 * their background image */
384 SPIEnum enable_background;
386 /// style belongs to a cloned object
387 bool cloned;
389 sigc::connection release_connection;
391 sigc::connection filter_modified_connection;
392 sigc::connection fill_ps_modified_connection;
393 sigc::connection stroke_ps_modified_connection;
395 SPObject *getFilter() { return (filter.href) ? filter.href->getObject() : 0; }
396 SPObject const *getFilter() const { return (filter.href) ? filter.href->getObject() : 0; }
397 gchar const *getFilterURI() const { return (filter.href) ? filter.href->getURI()->toString() : 0; }
399 SPPaintServer *getFillPaintServer() { return (fill.value.href) ? fill.value.href->getObject() : 0; }
400 SPPaintServer const *getFillPaintServer() const { return (fill.value.href) ? fill.value.href->getObject() : 0; }
401 gchar const *getFillURI() const { return (fill.value.href) ? fill.value.href->getURI()->toString() : 0; }
403 SPPaintServer *getStrokePaintServer() { return (stroke.value.href) ? stroke.value.href->getObject() : 0; }
404 SPPaintServer const *getStrokePaintServer() const { return (stroke.value.href) ? stroke.value.href->getObject() : 0; }
405 gchar const *getStrokeURI() const { return (stroke.value.href) ? stroke.value.href->getURI()->toString() : 0; }
406 };
408 SPStyle *sp_style_new(SPDocument *document);
410 SPStyle *sp_style_new_from_object(SPObject *object);
412 SPStyle *sp_style_ref(SPStyle *style);
414 SPStyle *sp_style_unref(SPStyle *style);
416 void sp_style_read_from_object(SPStyle *style, SPObject *object);
418 void sp_style_read_from_prefs(SPStyle *style, Glib::ustring const &path);
420 void sp_style_merge_from_style_string(SPStyle *style, gchar const *p);
422 void sp_style_merge_from_parent(SPStyle *style, SPStyle const *parent);
424 void sp_style_merge_from_dying_parent(SPStyle *style, SPStyle const *parent);
426 gchar *sp_style_write_string(SPStyle const *style, guint flags = SP_STYLE_FLAG_IFSET);
428 gchar *sp_style_write_difference(SPStyle const *from, SPStyle const *to);
430 void sp_style_set_to_uri_string (SPStyle *style, bool isfill, const gchar *uri);
432 /* SPTextStyle */
434 enum SPCSSFontSize {
435 SP_CSS_FONT_SIZE_XX_SMALL,
436 SP_CSS_FONT_SIZE_X_SMALL,
437 SP_CSS_FONT_SIZE_SMALL,
438 SP_CSS_FONT_SIZE_MEDIUM,
439 SP_CSS_FONT_SIZE_LARGE,
440 SP_CSS_FONT_SIZE_X_LARGE,
441 SP_CSS_FONT_SIZE_XX_LARGE,
442 SP_CSS_FONT_SIZE_SMALLER,
443 SP_CSS_FONT_SIZE_LARGER
444 };
446 enum SPCSSFontStyle {
447 SP_CSS_FONT_STYLE_NORMAL,
448 SP_CSS_FONT_STYLE_ITALIC,
449 SP_CSS_FONT_STYLE_OBLIQUE
450 };
452 enum SPCSSFontVariant {
453 SP_CSS_FONT_VARIANT_NORMAL,
454 SP_CSS_FONT_VARIANT_SMALL_CAPS
455 };
457 enum SPCSSFontWeight {
458 SP_CSS_FONT_WEIGHT_100,
459 SP_CSS_FONT_WEIGHT_200,
460 SP_CSS_FONT_WEIGHT_300,
461 SP_CSS_FONT_WEIGHT_400,
462 SP_CSS_FONT_WEIGHT_500,
463 SP_CSS_FONT_WEIGHT_600,
464 SP_CSS_FONT_WEIGHT_700,
465 SP_CSS_FONT_WEIGHT_800,
466 SP_CSS_FONT_WEIGHT_900,
467 SP_CSS_FONT_WEIGHT_NORMAL,
468 SP_CSS_FONT_WEIGHT_BOLD,
469 SP_CSS_FONT_WEIGHT_LIGHTER,
470 SP_CSS_FONT_WEIGHT_BOLDER
471 };
473 enum SPCSSFontStretch {
474 SP_CSS_FONT_STRETCH_ULTRA_CONDENSED,
475 SP_CSS_FONT_STRETCH_EXTRA_CONDENSED,
476 SP_CSS_FONT_STRETCH_CONDENSED,
477 SP_CSS_FONT_STRETCH_SEMI_CONDENSED,
478 SP_CSS_FONT_STRETCH_NORMAL,
479 SP_CSS_FONT_STRETCH_SEMI_EXPANDED,
480 SP_CSS_FONT_STRETCH_EXPANDED,
481 SP_CSS_FONT_STRETCH_EXTRA_EXPANDED,
482 SP_CSS_FONT_STRETCH_ULTRA_EXPANDED,
483 SP_CSS_FONT_STRETCH_NARROWER,
484 SP_CSS_FONT_STRETCH_WIDER
485 };
487 enum SPCSSTextAlign {
488 SP_CSS_TEXT_ALIGN_START,
489 SP_CSS_TEXT_ALIGN_END,
490 SP_CSS_TEXT_ALIGN_LEFT,
491 SP_CSS_TEXT_ALIGN_RIGHT,
492 SP_CSS_TEXT_ALIGN_CENTER,
493 SP_CSS_TEXT_ALIGN_JUSTIFY
494 // also <string> is allowed, but only within table calls
495 };
497 enum SPCSSTextTransform {
498 SP_CSS_TEXT_TRANSFORM_CAPITALIZE,
499 SP_CSS_TEXT_TRANSFORM_UPPERCASE,
500 SP_CSS_TEXT_TRANSFORM_LOWERCASE,
501 SP_CSS_TEXT_TRANSFORM_NONE
502 };
504 enum SPCSSDirection {
505 SP_CSS_DIRECTION_LTR,
506 SP_CSS_DIRECTION_RTL
507 };
509 enum SPCSSBlockProgression {
510 SP_CSS_BLOCK_PROGRESSION_TB,
511 SP_CSS_BLOCK_PROGRESSION_RL,
512 SP_CSS_BLOCK_PROGRESSION_LR
513 };
515 enum SPCSSWritingMode {
516 SP_CSS_WRITING_MODE_LR_TB,
517 SP_CSS_WRITING_MODE_RL_TB,
518 SP_CSS_WRITING_MODE_TB_RL,
519 SP_CSS_WRITING_MODE_TB_LR
520 };
522 enum SPTextAnchor {
523 SP_CSS_TEXT_ANCHOR_START,
524 SP_CSS_TEXT_ANCHOR_MIDDLE,
525 SP_CSS_TEXT_ANCHOR_END
526 };
528 enum SPCSSBaselineShift {
529 SP_CSS_BASELINE_SHIFT_BASELINE,
530 SP_CSS_BASELINE_SHIFT_SUB,
531 SP_CSS_BASELINE_SHIFT_SUPER
532 };
534 enum SPVisibility {
535 SP_CSS_VISIBILITY_HIDDEN,
536 SP_CSS_VISIBILITY_COLLAPSE,
537 SP_CSS_VISIBILITY_VISIBLE
538 };
540 enum SPOverflow {
541 SP_CSS_OVERFLOW_VISIBLE,
542 SP_CSS_OVERFLOW_HIDDEN,
543 SP_CSS_OVERFLOW_SCROLL,
544 SP_CSS_OVERFLOW_AUTO
545 };
547 /// \todo more display types
548 enum SPCSSDisplay {
549 SP_CSS_DISPLAY_NONE,
550 SP_CSS_DISPLAY_INLINE,
551 SP_CSS_DISPLAY_BLOCK,
552 SP_CSS_DISPLAY_LIST_ITEM,
553 SP_CSS_DISPLAY_RUN_IN,
554 SP_CSS_DISPLAY_COMPACT,
555 SP_CSS_DISPLAY_MARKER,
556 SP_CSS_DISPLAY_TABLE,
557 SP_CSS_DISPLAY_INLINE_TABLE,
558 SP_CSS_DISPLAY_TABLE_ROW_GROUP,
559 SP_CSS_DISPLAY_TABLE_HEADER_GROUP,
560 SP_CSS_DISPLAY_TABLE_FOOTER_GROUP,
561 SP_CSS_DISPLAY_TABLE_ROW,
562 SP_CSS_DISPLAY_TABLE_COLUMN_GROUP,
563 SP_CSS_DISPLAY_TABLE_COLUMN,
564 SP_CSS_DISPLAY_TABLE_CELL,
565 SP_CSS_DISPLAY_TABLE_CAPTION
566 };
568 enum SPEnableBackground {
569 SP_CSS_BACKGROUND_ACCUMULATE,
570 SP_CSS_BACKGROUND_NEW
571 };
573 /// An SPTextStyle has a refcount, a font family, and a font name.
574 struct SPTextStyle {
575 int refcount;
577 /* CSS font properties */
578 SPIString font_family;
580 /* Full font name, as font_factory::ConstructFontSpecification would give */
581 SPIString font_specification;
583 /** \todo fixme: The 'font' property is ugly, and not working (lauris) */
584 SPIString font;
585 };
587 SPCSSAttr *sp_css_attr_from_style (SPStyle const *const style, guint flags);
588 SPCSSAttr *sp_css_attr_from_object(SPObject *object, guint flags = SP_STYLE_FLAG_IFSET);
589 SPCSSAttr *sp_css_attr_unset_text(SPCSSAttr *css);
590 SPCSSAttr *sp_css_attr_unset_uris(SPCSSAttr *css);
591 SPCSSAttr *sp_css_attr_scale(SPCSSAttr *css, double ex);
593 void sp_style_unset_property_attrs(SPObject *o);
595 void sp_style_set_property_url (SPObject *item, gchar const *property, SPObject *linked, bool recursive);
597 gchar *attribute_unquote(gchar const *val);
598 gchar *css2_escape_quote(gchar const *val);
600 #endif // SEEN_SP_STYLE_H
603 /*
604 Local Variables:
605 mode:c++
606 c-file-style:"stroustrup"
607 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
608 indent-tabs-mode:nil
609 fill-column:99
610 End:
611 */
612 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :