f680988f8768bacb0067d970fd276d6ba0b3dc22
1 #define __SP_DESKTOP_STYLE_C__
3 /** \file
4 * Desktop style management
5 *
6 * Authors:
7 * bulia byak
8 *
9 * Copyright (C) 2004 authors
10 *
11 * Released under GNU GPL, read the file 'COPYING' for more information
12 */
14 #include "desktop.h"
15 #include "color-rgba.h"
16 #include "svg/css-ostringstream.h"
17 #include "svg/svg-color.h"
18 #include "selection.h"
19 #include "sp-tspan.h"
20 #include "sp-textpath.h"
21 #include "inkscape.h"
22 #include "style.h"
23 #include "prefs-utils.h"
24 #include "sp-use.h"
25 #include "sp-flowtext.h"
26 #include "sp-flowregion.h"
27 #include "sp-flowdiv.h"
28 #include "sp-linear-gradient.h"
29 #include "sp-radial-gradient.h"
30 #include "sp-pattern.h"
31 #include "xml/repr.h"
32 #include "libnrtype/font-style-to-pos.h"
34 #include "desktop-style.h"
36 /**
37 * Set color on selection on desktop.
38 */
39 void
40 sp_desktop_set_color(SPDesktop *desktop, ColorRGBA const &color, bool is_relative, bool fill)
41 {
42 /// \todo relative color setting
43 if (is_relative) {
44 g_warning("FIXME: relative color setting not yet implemented");
45 return;
46 }
48 guint32 rgba = SP_RGBA32_F_COMPOSE(color[0], color[1], color[2], color[3]);
49 gchar b[64];
50 sp_svg_write_color(b, 64, rgba);
51 SPCSSAttr *css = sp_repr_css_attr_new();
52 if (fill) {
53 sp_repr_css_set_property(css, "fill", b);
54 Inkscape::CSSOStringStream osalpha;
55 osalpha << color[3];
56 sp_repr_css_set_property(css, "fill-opacity", osalpha.str().c_str());
57 } else {
58 sp_repr_css_set_property(css, "stroke", b);
59 Inkscape::CSSOStringStream osalpha;
60 osalpha << color[3];
61 sp_repr_css_set_property(css, "stroke-opacity", osalpha.str().c_str());
62 }
64 sp_desktop_set_style(desktop, css);
66 sp_repr_css_attr_unref(css);
67 }
69 /**
70 * Apply style on object and children, recursively.
71 */
72 void
73 sp_desktop_apply_css_recursive(SPObject *o, SPCSSAttr *css, bool skip_lines)
74 {
75 // non-items should not have style
76 if (!SP_IS_ITEM(o))
77 return;
79 // 1. tspans with role=line are not regular objects in that they are not supposed to have style of their own,
80 // but must always inherit from the parent text. Same for textPath.
81 // However, if the line tspan or textPath contains some style (old file?), we reluctantly set our style to it too.
83 // 2. Generally we allow setting style on clones, but when it's inside flowRegion, do not touch
84 // it, be it clone or not; it's just styleless shape (because that's how Inkscape does
85 // flowtext).
87 if (!(skip_lines
88 && ((SP_IS_TSPAN(o) && SP_TSPAN(o)->role == SP_TSPAN_ROLE_LINE)
89 || SP_IS_FLOWDIV(o)
90 || SP_IS_FLOWPARA(o)
91 || SP_IS_TEXTPATH(o))
92 && !SP_OBJECT_REPR(o)->attribute("style"))
93 &&
94 !(SP_IS_FLOWREGION(o) ||
95 SP_IS_FLOWREGIONEXCLUDE(o) ||
96 (SP_IS_USE(o) &&
97 SP_OBJECT_PARENT(o) &&
98 (SP_IS_FLOWREGION(SP_OBJECT_PARENT(o)) ||
99 SP_IS_FLOWREGIONEXCLUDE(SP_OBJECT_PARENT(o))
100 )
101 )
102 )
103 ) {
105 SPCSSAttr *css_set = sp_repr_css_attr_new();
106 sp_repr_css_merge(css_set, css);
108 // Scale the style by the inverse of the accumulated parent transform in the paste context.
109 {
110 NR::Matrix const local(sp_item_i2doc_affine(SP_ITEM(o)));
111 double const ex(NR::expansion(local));
112 if ( ( ex != 0. )
113 && ( ex != 1. ) ) {
114 sp_css_attr_scale(css_set, 1/ex);
115 }
116 }
118 sp_repr_css_change(SP_OBJECT_REPR(o), css_set, "style");
120 sp_repr_css_attr_unref(css_set);
121 }
123 // setting style on child of clone spills into the clone original (via shared repr), don't do it!
124 if (SP_IS_USE(o))
125 return;
127 for (SPObject *child = sp_object_first_child(SP_OBJECT(o)) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
128 if (sp_repr_css_property(css, "opacity", NULL) != NULL) {
129 // Unset properties which are accumulating and thus should not be set recursively.
130 // For example, setting opacity 0.5 on a group recursively would result in the visible opacity of 0.25 for an item in the group.
131 SPCSSAttr *css_recurse = sp_repr_css_attr_new();
132 sp_repr_css_merge(css_recurse, css);
133 sp_repr_css_set_property(css_recurse, "opacity", NULL);
134 sp_desktop_apply_css_recursive(child, css_recurse, skip_lines);
135 sp_repr_css_attr_unref(css_recurse);
136 } else {
137 sp_desktop_apply_css_recursive(child, css, skip_lines);
138 }
139 }
140 }
142 /**
143 * Apply style on selection on desktop.
144 */
145 void
146 sp_desktop_set_style(SPDesktop *desktop, SPCSSAttr *css, bool change, bool write_current)
147 {
148 if (write_current) {
149 // 1. Set internal value
150 sp_repr_css_merge(desktop->current, css);
152 // 1a. Write to prefs; make a copy and unset any URIs first
153 SPCSSAttr *css_write = sp_repr_css_attr_new();
154 sp_repr_css_merge(css_write, css);
155 sp_css_attr_unset_uris(css_write);
156 sp_repr_css_change(inkscape_get_repr(INKSCAPE, "desktop"), css_write, "style");
157 sp_repr_css_attr_unref(css_write);
158 }
160 if (!change)
161 return;
163 // 2. Emit signal
164 bool intercepted = desktop->_set_style_signal.emit(css);
166 /** \todo
167 * FIXME: in set_style, compensate pattern and gradient fills, stroke width,
168 * rect corners, font size for the object's own transform so that pasting
169 * fills does not depend on preserve/optimize.
170 */
172 // 3. If nobody has intercepted the signal, apply the style to the selection
173 if (!intercepted) {
174 for (GSList const *i = desktop->selection->itemList(); i != NULL; i = i->next) {
175 /// \todo if the style is text-only, apply only to texts?
176 sp_desktop_apply_css_recursive(SP_OBJECT(i->data), css, true);
177 }
178 }
179 }
181 /**
182 * Return the desktop's current style.
183 */
184 SPCSSAttr *
185 sp_desktop_get_style(SPDesktop *desktop, bool with_text)
186 {
187 SPCSSAttr *css = sp_repr_css_attr_new();
188 sp_repr_css_merge(css, desktop->current);
189 if (!css->attributeList()) {
190 sp_repr_css_attr_unref(css);
191 return NULL;
192 } else {
193 if (!with_text) {
194 css = sp_css_attr_unset_text(css);
195 }
196 return css;
197 }
198 }
200 /**
201 * Return the desktop's current color.
202 */
203 guint32
204 sp_desktop_get_color(SPDesktop *desktop, bool is_fill)
205 {
206 guint32 r = 0; // if there's no color, return black
207 gchar const *property = sp_repr_css_property(desktop->current,
208 is_fill ? "fill" : "stroke",
209 "#000");
211 if (desktop->current && property) { // if there is style and the property in it,
212 if (strncmp(property, "url", 3)) { // and if it's not url,
213 // read it
214 r = sp_svg_read_color(property, r);
215 }
216 }
218 return r;
219 }
221 guint32
222 sp_desktop_get_color_tool(SPDesktop *desktop, char const *tool, bool is_fill)
223 {
224 SPCSSAttr *css = NULL;
225 guint32 r = 0; // if there's no color, return black
226 if (prefs_get_int_attribute(tool, "usecurrent", 0) != 0) {
227 css = sp_desktop_get_style(desktop, is_fill);
228 }
229 else {
230 Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, tool);
231 css = sp_repr_css_attr_inherited(tool_repr, "style");
232 }
234 gchar const *property = sp_repr_css_property(css, is_fill ? "fill" : "stroke", "#000");
236 if (desktop->current && property) { // if there is style and the property in it,
237 if (strncmp(property, "url", 3)) { // and if it's not url,
238 // read it
239 r = sp_svg_read_color(property, r);
240 }
241 }
242 return r | 0xff;
243 }
244 /**
245 * Apply the desktop's current style or the tool style to repr.
246 */
247 void
248 sp_desktop_apply_style_tool(SPDesktop *desktop, Inkscape::XML::Node *repr, char const *tool, bool with_text)
249 {
250 SPCSSAttr *css_current = sp_desktop_get_style(desktop, with_text);
251 if ((prefs_get_int_attribute(tool, "usecurrent", 0) != 0) && css_current) {
252 sp_repr_css_set(repr, css_current, "style");
253 } else {
254 Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, tool);
255 if (tool_repr) {
256 SPCSSAttr *css = sp_repr_css_attr_inherited(tool_repr, "style");
257 sp_repr_css_set(repr, css, "style");
258 sp_repr_css_attr_unref(css);
259 }
260 }
261 if (css_current) {sp_repr_css_attr_unref(css_current);
262 }
263 }
265 /**
266 * Returns the font size (in SVG pixels) of the text tool style (if text
267 * tool uses its own style) or desktop style (otherwise).
268 */
269 double
270 sp_desktop_get_font_size_tool(SPDesktop *desktop)
271 {
272 gchar const *desktop_style = inkscape_get_repr(INKSCAPE, "desktop")->attribute("style");
273 gchar const *style_str = NULL;
274 if ((prefs_get_int_attribute("tools.text", "usecurrent", 0) != 0) && desktop_style) {
275 style_str = desktop_style;
276 } else {
277 Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, "tools.text");
278 if (tool_repr) {
279 style_str = tool_repr->attribute("style");
280 }
281 }
283 double ret = 12;
284 if (style_str) {
285 SPStyle *style = sp_style_new();
286 sp_style_merge_from_style_string(style, style_str);
287 ret = style->font_size.computed;
288 sp_style_unref(style);
289 }
290 return ret;
291 }
293 /** Determine average stroke width, simple method */
294 // see TODO in dialogs/stroke-style.cpp on how to get rid of this eventually
295 gdouble
296 stroke_average_width (GSList const *objects)
297 {
298 if (g_slist_length ((GSList *) objects) == 0)
299 return NR_HUGE;
301 gdouble avgwidth = 0.0;
302 bool notstroked = true;
303 int n_notstroked = 0;
305 for (GSList const *l = objects; l != NULL; l = l->next) {
306 if (!SP_IS_ITEM (l->data))
307 continue;
309 NR::Matrix i2d = sp_item_i2d_affine (SP_ITEM(l->data));
311 SPObject *object = SP_OBJECT(l->data);
313 if ( object->style->stroke.type == SP_PAINT_TYPE_NONE ) {
314 ++n_notstroked; // do not count nonstroked objects
315 continue;
316 } else {
317 notstroked = false;
318 }
320 avgwidth += SP_OBJECT_STYLE (object)->stroke_width.computed * i2d.expansion();
321 }
323 if (notstroked)
324 return NR_HUGE;
326 return avgwidth / (g_slist_length ((GSList *) objects) - n_notstroked);
327 }
329 /**
330 * Write to style_res the average fill or stroke of list of objects, if applicable.
331 */
332 int
333 objects_query_fillstroke (GSList *objects, SPStyle *style_res, bool const isfill)
334 {
335 if (g_slist_length(objects) == 0) {
336 /* No objects, set empty */
337 return QUERY_STYLE_NOTHING;
338 }
340 SPIPaint *paint_res = isfill? &style_res->fill : &style_res->stroke;
341 paint_res->type = SP_PAINT_TYPE_IMPOSSIBLE;
342 paint_res->set = TRUE;
344 gfloat c[4];
345 c[0] = c[1] = c[2] = c[3] = 0.0;
346 gint num = 0;
348 gfloat prev[4];
349 prev[0] = prev[1] = prev[2] = prev[3] = 0.0;
350 bool same_color = true;
352 for (GSList const *i = objects; i != NULL; i = i->next) {
353 SPObject *obj = SP_OBJECT (i->data);
354 SPStyle *style = SP_OBJECT_STYLE (obj);
355 if (!style) continue;
357 SPIPaint *paint = isfill? &style->fill : &style->stroke;
359 // We consider paint "effectively set" for anything within text hierarchy
360 SPObject *parent = SP_OBJECT_PARENT (obj);
361 bool paint_effectively_set = paint->set || (SP_IS_TEXT(parent) || SP_IS_TEXTPATH(parent) || SP_IS_TSPAN(parent) || SP_IS_FLOWTEXT(parent) || SP_IS_FLOWDIV(parent) || SP_IS_FLOWPARA(parent) || SP_IS_FLOWTSPAN(parent) || SP_IS_FLOWLINE(parent));
363 // 1. Bail out with QUERY_STYLE_MULTIPLE_DIFFERENT if necessary
365 if ((paint_res->type != SP_PAINT_TYPE_IMPOSSIBLE) && (paint->type != paint_res->type || (paint_res->set != paint_effectively_set))) {
366 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different types of paint
367 }
369 if (paint_res->set && paint->set && paint_res->type == SP_PAINT_TYPE_PAINTSERVER) {
370 // both previous paint and this paint were a server, see if the servers are compatible
372 SPPaintServer *server_res = isfill? SP_STYLE_FILL_SERVER (style_res) : SP_STYLE_STROKE_SERVER (style_res);
373 SPPaintServer *server = isfill? SP_STYLE_FILL_SERVER (style) : SP_STYLE_STROKE_SERVER (style);
375 if (SP_IS_LINEARGRADIENT (server_res)) {
377 if (!SP_IS_LINEARGRADIENT(server))
378 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different kind of server
380 SPGradient *vector = sp_gradient_get_vector ( SP_GRADIENT (server), FALSE );
381 SPGradient *vector_res = sp_gradient_get_vector ( SP_GRADIENT (server_res), FALSE );
382 if (vector_res != vector)
383 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different gradient vectors
385 } else if (SP_IS_RADIALGRADIENT (server_res)) {
387 if (!SP_IS_RADIALGRADIENT(server))
388 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different kind of server
390 SPGradient *vector = sp_gradient_get_vector ( SP_GRADIENT (server), FALSE );
391 SPGradient *vector_res = sp_gradient_get_vector ( SP_GRADIENT (server_res), FALSE );
392 if (vector_res != vector)
393 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different gradient vectors
395 } else if (SP_IS_PATTERN (server_res)) {
397 if (!SP_IS_PATTERN(server))
398 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different kind of server
400 SPPattern *pat = pattern_getroot (SP_PATTERN (server));
401 SPPattern *pat_res = pattern_getroot (SP_PATTERN (server_res));
402 if (pat_res != pat)
403 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different pattern roots
404 }
405 }
407 // 2. Sum color, copy server from paint to paint_res
409 if (paint_res->set && paint_effectively_set && paint->type == SP_PAINT_TYPE_COLOR) {
411 gfloat d[3];
412 sp_color_get_rgb_floatv (&paint->value.color, d);
414 // Check if this color is the same as previous
415 if (paint_res->type == SP_PAINT_TYPE_IMPOSSIBLE) {
416 prev[0] = d[0];
417 prev[1] = d[1];
418 prev[2] = d[2];
419 prev[3] = d[3];
420 } else {
421 if (same_color && (prev[0] != d[0] || prev[1] != d[1] || prev[2] != d[2] || prev[3] != d[3]))
422 same_color = false;
423 }
425 // average color
426 c[0] += d[0];
427 c[1] += d[1];
428 c[2] += d[2];
429 c[3] += SP_SCALE24_TO_FLOAT (isfill? style->fill_opacity.value : style->stroke_opacity.value);
430 num ++;
431 }
433 if (paint_res->set && paint_effectively_set && paint->type == SP_PAINT_TYPE_PAINTSERVER) { // copy the server
434 if (isfill) {
435 SP_STYLE_FILL_SERVER (style_res) = SP_STYLE_FILL_SERVER (style);
436 } else {
437 SP_STYLE_STROKE_SERVER (style_res) = SP_STYLE_STROKE_SERVER (style);
438 }
439 }
440 paint_res->type = paint->type;
441 paint_res->set = paint_effectively_set;
442 style_res->fill_rule.computed = style->fill_rule.computed; // no averaging on this, just use the last one
443 }
445 // After all objects processed, divide the color if necessary and return
446 if (paint_res->set && paint_res->type == SP_PAINT_TYPE_COLOR) { // set the color
447 g_assert (num >= 1);
449 c[0] /= num;
450 c[1] /= num;
451 c[2] /= num;
452 c[3] /= num;
453 sp_color_set_rgb_float(&paint_res->value.color, c[0], c[1], c[2]);
454 if (isfill) {
455 style_res->fill_opacity.value = SP_SCALE24_FROM_FLOAT (c[3]);
456 } else {
457 style_res->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (c[3]);
458 }
459 if (num > 1) {
460 if (same_color)
461 return QUERY_STYLE_MULTIPLE_SAME;
462 else
463 return QUERY_STYLE_MULTIPLE_AVERAGED;
464 } else {
465 return QUERY_STYLE_SINGLE;
466 }
467 }
469 // Not color
470 if (g_slist_length(objects) > 1) {
471 return QUERY_STYLE_MULTIPLE_SAME;
472 } else {
473 return QUERY_STYLE_SINGLE;
474 }
475 }
477 /**
478 * Write to style_res the average opacity of a list of objects.
479 */
480 int
481 objects_query_opacity (GSList *objects, SPStyle *style_res)
482 {
483 if (g_slist_length(objects) == 0) {
484 /* No objects, set empty */
485 return QUERY_STYLE_NOTHING;
486 }
488 gdouble opacity_sum = 0;
489 gdouble opacity_prev = -1;
490 bool same_opacity = true;
491 guint opacity_items = 0;
494 for (GSList const *i = objects; i != NULL; i = i->next) {
495 SPObject *obj = SP_OBJECT (i->data);
496 SPStyle *style = SP_OBJECT_STYLE (obj);
497 if (!style) continue;
499 double opacity = SP_SCALE24_TO_FLOAT(style->opacity.value);
500 opacity_sum += opacity;
501 if (opacity_prev != -1 && opacity != opacity_prev)
502 same_opacity = false;
503 opacity_prev = opacity;
504 opacity_items ++;
505 }
506 if (opacity_items > 1)
507 opacity_sum /= opacity_items;
509 style_res->opacity.value = SP_SCALE24_FROM_FLOAT(opacity_sum);
511 if (opacity_items == 0) {
512 return QUERY_STYLE_NOTHING;
513 } else if (opacity_items == 1) {
514 return QUERY_STYLE_SINGLE;
515 } else {
516 if (same_opacity)
517 return QUERY_STYLE_MULTIPLE_SAME;
518 else
519 return QUERY_STYLE_MULTIPLE_AVERAGED;
520 }
521 }
523 /**
524 * Write to style_res the average stroke width of a list of objects.
525 */
526 int
527 objects_query_strokewidth (GSList *objects, SPStyle *style_res)
528 {
529 if (g_slist_length(objects) == 0) {
530 /* No objects, set empty */
531 return QUERY_STYLE_NOTHING;
532 }
534 gdouble avgwidth = 0.0;
536 gdouble prev_sw = -1;
537 bool same_sw = true;
539 int n_stroked = 0;
541 for (GSList const *i = objects; i != NULL; i = i->next) {
542 SPObject *obj = SP_OBJECT (i->data);
543 if (!SP_IS_ITEM(obj)) continue;
544 SPStyle *style = SP_OBJECT_STYLE (obj);
545 if (!style) continue;
547 if ( style->stroke.type == SP_PAINT_TYPE_NONE ) {
548 continue;
549 }
551 n_stroked ++;
553 NR::Matrix i2d = sp_item_i2d_affine (SP_ITEM(obj));
554 double sw = style->stroke_width.computed * i2d.expansion();
556 if (prev_sw != -1 && fabs(sw - prev_sw) > 1e-3)
557 same_sw = false;
558 prev_sw = sw;
560 avgwidth += sw;
561 }
563 if (n_stroked > 1)
564 avgwidth /= (n_stroked);
566 style_res->stroke_width.computed = avgwidth;
567 style_res->stroke_width.set = true;
569 if (n_stroked == 0) {
570 return QUERY_STYLE_NOTHING;
571 } else if (n_stroked == 1) {
572 return QUERY_STYLE_SINGLE;
573 } else {
574 if (same_sw)
575 return QUERY_STYLE_MULTIPLE_SAME;
576 else
577 return QUERY_STYLE_MULTIPLE_AVERAGED;
578 }
579 }
581 /**
582 * Write to style_res the average miter limit of a list of objects.
583 */
584 int
585 objects_query_miterlimit (GSList *objects, SPStyle *style_res)
586 {
587 if (g_slist_length(objects) == 0) {
588 /* No objects, set empty */
589 return QUERY_STYLE_NOTHING;
590 }
592 gdouble avgml = 0.0;
593 int n_stroked = 0;
595 gdouble prev_ml = -1;
596 bool same_ml = true;
598 for (GSList const *i = objects; i != NULL; i = i->next) {
599 SPObject *obj = SP_OBJECT (i->data);
600 if (!SP_IS_ITEM(obj)) continue;
601 SPStyle *style = SP_OBJECT_STYLE (obj);
602 if (!style) continue;
604 if ( style->stroke.type == SP_PAINT_TYPE_NONE ) {
605 continue;
606 }
608 n_stroked ++;
610 if (prev_ml != -1 && fabs(style->stroke_miterlimit.value - prev_ml) > 1e-3)
611 same_ml = false;
612 prev_ml = style->stroke_miterlimit.value;
614 avgml += style->stroke_miterlimit.value;
615 }
617 if (n_stroked > 1)
618 avgml /= (n_stroked);
620 style_res->stroke_miterlimit.value = avgml;
621 style_res->stroke_miterlimit.set = true;
623 if (n_stroked == 0) {
624 return QUERY_STYLE_NOTHING;
625 } else if (n_stroked == 1) {
626 return QUERY_STYLE_SINGLE;
627 } else {
628 if (same_ml)
629 return QUERY_STYLE_MULTIPLE_SAME;
630 else
631 return QUERY_STYLE_MULTIPLE_AVERAGED;
632 }
633 }
635 /**
636 * Write to style_res the stroke cap of a list of objects.
637 */
638 int
639 objects_query_strokecap (GSList *objects, SPStyle *style_res)
640 {
641 if (g_slist_length(objects) == 0) {
642 /* No objects, set empty */
643 return QUERY_STYLE_NOTHING;
644 }
646 int cap = -1;
647 gdouble prev_cap = -1;
648 bool same_cap = true;
649 int n_stroked = 0;
651 for (GSList const *i = objects; i != NULL; i = i->next) {
652 SPObject *obj = SP_OBJECT (i->data);
653 if (!SP_IS_ITEM(obj)) continue;
654 SPStyle *style = SP_OBJECT_STYLE (obj);
655 if (!style) continue;
657 if ( style->stroke.type == SP_PAINT_TYPE_NONE ) {
658 continue;
659 }
661 n_stroked ++;
663 if (prev_cap != -1 && style->stroke_linecap.value != prev_cap)
664 same_cap = false;
665 prev_cap = style->stroke_linecap.value;
667 cap = style->stroke_linecap.value;
668 }
670 style_res->stroke_linecap.value = cap;
671 style_res->stroke_linecap.set = true;
673 if (n_stroked == 0) {
674 return QUERY_STYLE_NOTHING;
675 } else if (n_stroked == 1) {
676 return QUERY_STYLE_SINGLE;
677 } else {
678 if (same_cap)
679 return QUERY_STYLE_MULTIPLE_SAME;
680 else
681 return QUERY_STYLE_MULTIPLE_DIFFERENT;
682 }
683 }
685 /**
686 * Write to style_res the stroke join of a list of objects.
687 */
688 int
689 objects_query_strokejoin (GSList *objects, SPStyle *style_res)
690 {
691 if (g_slist_length(objects) == 0) {
692 /* No objects, set empty */
693 return QUERY_STYLE_NOTHING;
694 }
696 int join = -1;
697 gdouble prev_join = -1;
698 bool same_join = true;
699 int n_stroked = 0;
701 for (GSList const *i = objects; i != NULL; i = i->next) {
702 SPObject *obj = SP_OBJECT (i->data);
703 if (!SP_IS_ITEM(obj)) continue;
704 SPStyle *style = SP_OBJECT_STYLE (obj);
705 if (!style) continue;
707 if ( style->stroke.type == SP_PAINT_TYPE_NONE ) {
708 continue;
709 }
711 n_stroked ++;
713 if (prev_join != -1 && style->stroke_linejoin.value != prev_join)
714 same_join = false;
715 prev_join = style->stroke_linejoin.value;
717 join = style->stroke_linejoin.value;
718 }
720 style_res->stroke_linejoin.value = join;
721 style_res->stroke_linejoin.set = true;
723 if (n_stroked == 0) {
724 return QUERY_STYLE_NOTHING;
725 } else if (n_stroked == 1) {
726 return QUERY_STYLE_SINGLE;
727 } else {
728 if (same_join)
729 return QUERY_STYLE_MULTIPLE_SAME;
730 else
731 return QUERY_STYLE_MULTIPLE_DIFFERENT;
732 }
733 }
735 /**
736 * Write to style_res the average font size and spacing of objects.
737 */
738 int
739 objects_query_fontnumbers (GSList *objects, SPStyle *style_res)
740 {
741 bool different = false;
743 double size = 0;
744 double letterspacing = 0;
745 double linespacing = 0;
746 bool linespacing_normal = false;
747 bool letterspacing_normal = false;
749 double size_prev = 0;
750 double letterspacing_prev = 0;
751 double linespacing_prev = 0;
753 /// \todo FIXME: add word spacing, kerns? rotates?
755 int texts = 0;
757 for (GSList const *i = objects; i != NULL; i = i->next) {
758 SPObject *obj = SP_OBJECT (i->data);
760 if (!SP_IS_TEXT(obj) && !SP_IS_FLOWTEXT(obj)
761 && !SP_IS_TSPAN(obj) && !SP_IS_TEXTPATH(obj)
762 && !SP_IS_FLOWDIV(obj) && !SP_IS_FLOWPARA(obj) && !SP_IS_FLOWTSPAN(obj))
763 continue;
765 SPStyle *style = SP_OBJECT_STYLE (obj);
766 if (!style) continue;
768 texts ++;
769 size += style->font_size.computed * NR::expansion(sp_item_i2d_affine(SP_ITEM(obj))); /// \todo FIXME: we assume non-% units here
771 if (style->letter_spacing.normal) {
772 if (!different && (letterspacing_prev == 0 || letterspacing_prev == letterspacing))
773 letterspacing_normal = true;
774 } else {
775 letterspacing += style->letter_spacing.computed; /// \todo FIXME: we assume non-% units here
776 letterspacing_normal = false;
777 }
779 double linespacing_current;
780 if (style->line_height.normal) {
781 linespacing_current = Inkscape::Text::Layout::LINE_HEIGHT_NORMAL;
782 if (!different && (linespacing_prev == 0 || linespacing_prev == linespacing_current))
783 linespacing_normal = true;
784 } else if (style->line_height.unit == SP_CSS_UNIT_PERCENT || style->font_size.computed == 0) {
785 linespacing_current = style->line_height.value;
786 linespacing_normal = false;
787 } else { // we need % here
788 linespacing_current = style->line_height.computed / style->font_size.computed;
789 linespacing_normal = false;
790 }
791 linespacing += linespacing_current;
793 if ((size_prev != 0 && style->font_size.computed != size_prev) ||
794 (letterspacing_prev != 0 && style->letter_spacing.computed != letterspacing_prev) ||
795 (linespacing_prev != 0 && linespacing_current != linespacing_prev)) {
796 different = true;
797 }
799 size_prev = style->font_size.computed;
800 letterspacing_prev = style->letter_spacing.computed;
801 linespacing_prev = linespacing_current;
803 // FIXME: we must detect MULTIPLE_DIFFERENT for these too
804 style_res->text_anchor.computed = style->text_anchor.computed;
805 style_res->writing_mode.computed = style->writing_mode.computed;
806 }
808 if (texts == 0)
809 return QUERY_STYLE_NOTHING;
811 if (texts > 1) {
812 size /= texts;
813 letterspacing /= texts;
814 linespacing /= texts;
815 }
817 style_res->font_size.computed = size;
818 style_res->font_size.type = SP_FONT_SIZE_LENGTH;
820 style_res->letter_spacing.normal = letterspacing_normal;
821 style_res->letter_spacing.computed = letterspacing;
823 style_res->line_height.normal = linespacing_normal;
824 style_res->line_height.computed = linespacing;
825 style_res->line_height.value = linespacing;
826 style_res->line_height.unit = SP_CSS_UNIT_PERCENT;
828 if (texts > 1) {
829 if (different) {
830 return QUERY_STYLE_MULTIPLE_AVERAGED;
831 } else {
832 return QUERY_STYLE_MULTIPLE_SAME;
833 }
834 } else {
835 return QUERY_STYLE_SINGLE;
836 }
837 }
839 /**
840 * Write to style_res the average font style of objects.
841 */
842 int
843 objects_query_fontstyle (GSList *objects, SPStyle *style_res)
844 {
845 bool different = false;
846 bool set = false;
848 int texts = 0;
850 for (GSList const *i = objects; i != NULL; i = i->next) {
851 SPObject *obj = SP_OBJECT (i->data);
853 if (!SP_IS_TEXT(obj) && !SP_IS_FLOWTEXT(obj)
854 && !SP_IS_TSPAN(obj) && !SP_IS_TEXTPATH(obj)
855 && !SP_IS_FLOWDIV(obj) && !SP_IS_FLOWPARA(obj) && !SP_IS_FLOWTSPAN(obj))
856 continue;
858 SPStyle *style = SP_OBJECT_STYLE (obj);
859 if (!style) continue;
861 texts ++;
863 if (set &&
864 font_style_to_pos(*style_res).signature() != font_style_to_pos(*style).signature() ) {
865 different = true; // different styles
866 }
868 set = TRUE;
869 style_res->font_weight.value = style_res->font_weight.computed = style->font_weight.computed;
870 style_res->font_style.value = style_res->font_style.computed = style->font_style.computed;
871 style_res->font_stretch.value = style_res->font_stretch.computed = style->font_stretch.computed;
872 style_res->font_variant.value = style_res->font_variant.computed = style->font_variant.computed;
873 }
875 if (texts == 0 || !set)
876 return QUERY_STYLE_NOTHING;
878 if (texts > 1) {
879 if (different) {
880 return QUERY_STYLE_MULTIPLE_DIFFERENT;
881 } else {
882 return QUERY_STYLE_MULTIPLE_SAME;
883 }
884 } else {
885 return QUERY_STYLE_SINGLE;
886 }
887 }
889 /**
890 * Write to style_res the average font family of objects.
891 */
892 int
893 objects_query_fontfamily (GSList *objects, SPStyle *style_res)
894 {
895 bool different = false;
896 int texts = 0;
898 if (style_res->text->font_family.value) {
899 g_free(style_res->text->font_family.value);
900 style_res->text->font_family.value = NULL;
901 }
902 style_res->text->font_family.set = FALSE;
904 for (GSList const *i = objects; i != NULL; i = i->next) {
905 SPObject *obj = SP_OBJECT (i->data);
907 if (!SP_IS_TEXT(obj) && !SP_IS_FLOWTEXT(obj)
908 && !SP_IS_TSPAN(obj) && !SP_IS_TEXTPATH(obj)
909 && !SP_IS_FLOWDIV(obj) && !SP_IS_FLOWPARA(obj) && !SP_IS_FLOWTSPAN(obj))
910 continue;
912 SPStyle *style = SP_OBJECT_STYLE (obj);
913 if (!style) continue;
915 texts ++;
917 if (style_res->text->font_family.value && style->text->font_family.value &&
918 strcmp (style_res->text->font_family.value, style->text->font_family.value)) {
919 different = true; // different fonts
920 }
922 if (style_res->text->font_family.value) {
923 g_free(style_res->text->font_family.value);
924 style_res->text->font_family.value = NULL;
925 }
927 style_res->text->font_family.set = TRUE;
928 style_res->text->font_family.value = g_strdup(style->text->font_family.value);
929 }
931 if (texts == 0 || !style_res->text->font_family.set)
932 return QUERY_STYLE_NOTHING;
934 if (texts > 1) {
935 if (different) {
936 return QUERY_STYLE_MULTIPLE_DIFFERENT;
937 } else {
938 return QUERY_STYLE_MULTIPLE_SAME;
939 }
940 } else {
941 return QUERY_STYLE_SINGLE;
942 }
943 }
945 /**
946 * Query the given list of objects for the given property, write
947 * the result to style, return appropriate flag.
948 */
949 int
950 sp_desktop_query_style_from_list (GSList *list, SPStyle *style, int property)
951 {
952 if (property == QUERY_STYLE_PROPERTY_FILL) {
953 return objects_query_fillstroke (list, style, true);
954 } else if (property == QUERY_STYLE_PROPERTY_STROKE) {
955 return objects_query_fillstroke (list, style, false);
957 } else if (property == QUERY_STYLE_PROPERTY_STROKEWIDTH) {
958 return objects_query_strokewidth (list, style);
959 } else if (property == QUERY_STYLE_PROPERTY_STROKEMITERLIMIT) {
960 return objects_query_miterlimit (list, style);
961 } else if (property == QUERY_STYLE_PROPERTY_STROKECAP) {
962 return objects_query_strokecap (list, style);
963 } else if (property == QUERY_STYLE_PROPERTY_STROKEJOIN) {
964 return objects_query_strokejoin (list, style);
966 } else if (property == QUERY_STYLE_PROPERTY_MASTEROPACITY) {
967 return objects_query_opacity (list, style);
969 } else if (property == QUERY_STYLE_PROPERTY_FONTFAMILY) {
970 return objects_query_fontfamily (list, style);
971 } else if (property == QUERY_STYLE_PROPERTY_FONTSTYLE) {
972 return objects_query_fontstyle (list, style);
973 } else if (property == QUERY_STYLE_PROPERTY_FONTNUMBERS) {
974 return objects_query_fontnumbers (list, style);
975 }
977 return QUERY_STYLE_NOTHING;
978 }
981 /**
982 * Query the subselection (if any) or selection on the given desktop for the given property, write
983 * the result to style, return appropriate flag.
984 */
985 int
986 sp_desktop_query_style(SPDesktop *desktop, SPStyle *style, int property)
987 {
988 int ret = desktop->_query_style_signal.emit(style, property);
990 if (ret != QUERY_STYLE_NOTHING)
991 return ret; // subselection returned a style, pass it on
993 // otherwise, do querying and averaging over selection
994 return sp_desktop_query_style_from_list ((GSList *) desktop->selection->itemList(), style, property);
995 }
997 /**
998 * Do the same as sp_desktop_query_style for all (defined) style properties, return true if none of
999 * the properties returned QUERY_STYLE_NOTHING.
1000 */
1001 bool
1002 sp_desktop_query_style_all (SPDesktop *desktop, SPStyle *query)
1003 {
1004 int result_family = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_FONTFAMILY);
1005 int result_fstyle = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_FONTSTYLE);
1006 int result_fnumbers = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_FONTNUMBERS);
1007 int result_fill = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_FILL);
1008 int result_stroke = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_STROKE);
1009 int result_strokewidth = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_STROKEWIDTH);
1010 int result_strokemiterlimit = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_STROKEMITERLIMIT);
1011 int result_strokecap = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_STROKECAP);
1012 int result_strokejoin = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_STROKEJOIN);
1013 int result_opacity = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_MASTEROPACITY);
1015 return (result_family != QUERY_STYLE_NOTHING && result_fstyle != QUERY_STYLE_NOTHING && result_fnumbers != QUERY_STYLE_NOTHING && result_fill != QUERY_STYLE_NOTHING && result_stroke != QUERY_STYLE_NOTHING && result_opacity != QUERY_STYLE_NOTHING && result_strokewidth != QUERY_STYLE_NOTHING && result_strokemiterlimit != QUERY_STYLE_NOTHING && result_strokecap != QUERY_STYLE_NOTHING && result_strokejoin != QUERY_STYLE_NOTHING);
1016 }
1019 /*
1020 Local Variables:
1021 mode:c++
1022 c-file-style:"stroustrup"
1023 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1024 indent-tabs-mode:nil
1025 fill-column:99
1026 End:
1027 */
1028 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :