afb3a104528f62dff82213ee53114ba488f13771
1 #define __SP_DESKTOP_STYLE_C__
3 /** \file
4 * Desktop style management
5 *
6 * Authors:
7 * bulia byak
8 * verbalshadow
9 *
10 * Copyright (C) 2004, 2006 authors
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #include "desktop.h"
16 #include "color-rgba.h"
17 #include "svg/css-ostringstream.h"
18 #include "svg/svg.h"
19 #include "svg/svg-color.h"
20 #include "selection.h"
21 #include "sp-tspan.h"
22 #include "sp-textpath.h"
23 #include "inkscape.h"
24 #include "style.h"
25 #include "prefs-utils.h"
26 #include "sp-use.h"
27 #include "sp-flowtext.h"
28 #include "sp-flowregion.h"
29 #include "sp-flowdiv.h"
30 #include "sp-linear-gradient.h"
31 #include "sp-radial-gradient.h"
32 #include "sp-pattern.h"
33 #include "xml/repr.h"
34 #include "libnrtype/font-style-to-pos.h"
37 #include "desktop-style.h"
39 /**
40 * Set color on selection on desktop.
41 */
42 void
43 sp_desktop_set_color(SPDesktop *desktop, ColorRGBA const &color, bool is_relative, bool fill)
44 {
45 /// \todo relative color setting
46 if (is_relative) {
47 g_warning("FIXME: relative color setting not yet implemented");
48 return;
49 }
51 guint32 rgba = SP_RGBA32_F_COMPOSE(color[0], color[1], color[2], color[3]);
52 gchar b[64];
53 sp_svg_write_color(b, 64, rgba);
54 SPCSSAttr *css = sp_repr_css_attr_new();
55 if (fill) {
56 sp_repr_css_set_property(css, "fill", b);
57 Inkscape::CSSOStringStream osalpha;
58 osalpha << color[3];
59 sp_repr_css_set_property(css, "fill-opacity", osalpha.str().c_str());
60 } else {
61 sp_repr_css_set_property(css, "stroke", b);
62 Inkscape::CSSOStringStream osalpha;
63 osalpha << color[3];
64 sp_repr_css_set_property(css, "stroke-opacity", osalpha.str().c_str());
65 }
67 sp_desktop_set_style(desktop, css);
69 sp_repr_css_attr_unref(css);
70 }
72 /**
73 * Apply style on object and children, recursively.
74 */
75 void
76 sp_desktop_apply_css_recursive(SPObject *o, SPCSSAttr *css, bool skip_lines)
77 {
78 // non-items should not have style
79 if (!SP_IS_ITEM(o))
80 return;
82 // 1. tspans with role=line are not regular objects in that they are not supposed to have style of their own,
83 // but must always inherit from the parent text. Same for textPath.
84 // However, if the line tspan or textPath contains some style (old file?), we reluctantly set our style to it too.
86 // 2. Generally we allow setting style on clones, but when it's inside flowRegion, do not touch
87 // it, be it clone or not; it's just styleless shape (because that's how Inkscape does
88 // flowtext).
90 if (!(skip_lines
91 && ((SP_IS_TSPAN(o) && SP_TSPAN(o)->role == SP_TSPAN_ROLE_LINE)
92 || SP_IS_FLOWDIV(o)
93 || SP_IS_FLOWPARA(o)
94 || SP_IS_TEXTPATH(o))
95 && !SP_OBJECT_REPR(o)->attribute("style"))
96 &&
97 !(SP_IS_FLOWREGION(o) ||
98 SP_IS_FLOWREGIONEXCLUDE(o) ||
99 (SP_IS_USE(o) &&
100 SP_OBJECT_PARENT(o) &&
101 (SP_IS_FLOWREGION(SP_OBJECT_PARENT(o)) ||
102 SP_IS_FLOWREGIONEXCLUDE(SP_OBJECT_PARENT(o))
103 )
104 )
105 )
106 ) {
108 SPCSSAttr *css_set = sp_repr_css_attr_new();
109 sp_repr_css_merge(css_set, css);
111 // Scale the style by the inverse of the accumulated parent transform in the paste context.
112 {
113 NR::Matrix const local(sp_item_i2doc_affine(SP_ITEM(o)));
114 double const ex(NR::expansion(local));
115 if ( ( ex != 0. )
116 && ( ex != 1. ) ) {
117 sp_css_attr_scale(css_set, 1/ex);
118 }
119 }
121 sp_repr_css_change(SP_OBJECT_REPR(o), css_set, "style");
123 sp_repr_css_attr_unref(css_set);
124 }
126 // setting style on child of clone spills into the clone original (via shared repr), don't do it!
127 if (SP_IS_USE(o))
128 return;
130 for (SPObject *child = sp_object_first_child(SP_OBJECT(o)) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
131 if (sp_repr_css_property(css, "opacity", NULL) != NULL) {
132 // Unset properties which are accumulating and thus should not be set recursively.
133 // 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.
134 SPCSSAttr *css_recurse = sp_repr_css_attr_new();
135 sp_repr_css_merge(css_recurse, css);
136 sp_repr_css_set_property(css_recurse, "opacity", NULL);
137 sp_desktop_apply_css_recursive(child, css_recurse, skip_lines);
138 sp_repr_css_attr_unref(css_recurse);
139 } else {
140 sp_desktop_apply_css_recursive(child, css, skip_lines);
141 }
142 }
143 }
145 /**
146 * Apply style on selection on desktop.
147 */
148 void
149 sp_desktop_set_style(SPDesktop *desktop, SPCSSAttr *css, bool change, bool write_current)
150 {
151 if (write_current) {
152 // 1. Set internal value
153 sp_repr_css_merge(desktop->current, css);
155 // 1a. Write to prefs; make a copy and unset any URIs first
156 SPCSSAttr *css_write = sp_repr_css_attr_new();
157 sp_repr_css_merge(css_write, css);
158 sp_css_attr_unset_uris(css_write);
159 sp_repr_css_change(inkscape_get_repr(INKSCAPE, "desktop"), css_write, "style");
160 sp_repr_css_attr_unref(css_write);
161 }
163 if (!change)
164 return;
166 // 2. Emit signal
167 bool intercepted = desktop->_set_style_signal.emit(css);
169 /** \todo
170 * FIXME: in set_style, compensate pattern and gradient fills, stroke width,
171 * rect corners, font size for the object's own transform so that pasting
172 * fills does not depend on preserve/optimize.
173 */
175 // 3. If nobody has intercepted the signal, apply the style to the selection
176 if (!intercepted) {
177 for (GSList const *i = desktop->selection->itemList(); i != NULL; i = i->next) {
178 /// \todo if the style is text-only, apply only to texts?
179 sp_desktop_apply_css_recursive(SP_OBJECT(i->data), css, true);
180 }
181 }
182 }
184 /**
185 * Return the desktop's current style.
186 */
187 SPCSSAttr *
188 sp_desktop_get_style(SPDesktop *desktop, bool with_text)
189 {
190 SPCSSAttr *css = sp_repr_css_attr_new();
191 sp_repr_css_merge(css, desktop->current);
192 if (!css->attributeList()) {
193 sp_repr_css_attr_unref(css);
194 return NULL;
195 } else {
196 if (!with_text) {
197 css = sp_css_attr_unset_text(css);
198 }
199 return css;
200 }
201 }
203 /**
204 * Return the desktop's current color.
205 */
206 guint32
207 sp_desktop_get_color(SPDesktop *desktop, bool is_fill)
208 {
209 guint32 r = 0; // if there's no color, return black
210 gchar const *property = sp_repr_css_property(desktop->current,
211 is_fill ? "fill" : "stroke",
212 "#000");
214 if (desktop->current && property) { // if there is style and the property in it,
215 if (strncmp(property, "url", 3)) { // and if it's not url,
216 // read it
217 r = sp_svg_read_color(property, r);
218 }
219 }
221 return r;
222 }
224 double
225 sp_desktop_get_opacity_tool(SPDesktop *desktop, char const *tool, bool op)
226 {
227 SPCSSAttr *css = NULL;
228 gfloat value = 1.0; // default if nothing else found
229 if (prefs_get_double_attribute(tool, "usecurrent", 0) != 0) {
230 css = sp_desktop_get_style(desktop, op);
231 } else {
232 Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, tool);
233 css = sp_repr_css_attr_inherited(tool_repr, "style");
234 }
236 gchar const *property = css ? sp_repr_css_property(css, "opacity", "1.000") : 0;
238 if (desktop->current && property) { // if there is style and the property in it,
239 if ( !sp_svg_number_read_f(property, &value) ) {
240 value = 1.0; // things failed. set back to the default
241 }
242 }
243 return value;
244 }
245 guint32
246 sp_desktop_get_color_tool(SPDesktop *desktop, char const *tool, bool is_fill)
247 {
248 SPCSSAttr *css = NULL;
249 guint32 r = 0; // if there's no color, return black
250 bool op = true;
251 double opacity = sp_desktop_get_opacity_tool(SP_ACTIVE_DESKTOP, "tools.calligraphic", op);
252 if (prefs_get_int_attribute(tool, "usecurrent", 0) != 0) {
253 css = sp_desktop_get_style(desktop, is_fill);
254 } else {
255 Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, tool);
256 css = sp_repr_css_attr_inherited(tool_repr, "style");
257 }
259 gchar const *property = sp_repr_css_property(css, is_fill ? "fill" : "stroke", "#000");
261 if (desktop->current && property) { // if there is style and the property in it,
262 if (strncmp(property, "url", 3)) { // and if it's not url,
263 // read it
264 r = sp_svg_read_color(property, r);
265 }
266 }
267 return r | SP_COLOR_F_TO_U( opacity ); // return RGBA color
268 }
269 /**
270 * Apply the desktop's current style or the tool style to repr.
271 */
272 void
273 sp_desktop_apply_style_tool(SPDesktop *desktop, Inkscape::XML::Node *repr, char const *tool, bool with_text)
274 {
275 SPCSSAttr *css_current = sp_desktop_get_style(desktop, with_text);
276 if ((prefs_get_int_attribute(tool, "usecurrent", 0) != 0) && css_current) {
277 sp_repr_css_set(repr, css_current, "style");
278 } else {
279 Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, tool);
280 if (tool_repr) {
281 SPCSSAttr *css = sp_repr_css_attr_inherited(tool_repr, "style");
282 sp_repr_css_set(repr, css, "style");
283 sp_repr_css_attr_unref(css);
284 }
285 }
286 if (css_current) {sp_repr_css_attr_unref(css_current);
287 }
288 }
290 /**
291 * Returns the font size (in SVG pixels) of the text tool style (if text
292 * tool uses its own style) or desktop style (otherwise).
293 */
294 double
295 sp_desktop_get_font_size_tool(SPDesktop *desktop)
296 {
297 gchar const *desktop_style = inkscape_get_repr(INKSCAPE, "desktop")->attribute("style");
298 gchar const *style_str = NULL;
299 if ((prefs_get_int_attribute("tools.text", "usecurrent", 0) != 0) && desktop_style) {
300 style_str = desktop_style;
301 } else {
302 Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, "tools.text");
303 if (tool_repr) {
304 style_str = tool_repr->attribute("style");
305 }
306 }
308 double ret = 12;
309 if (style_str) {
310 SPStyle *style = sp_style_new();
311 sp_style_merge_from_style_string(style, style_str);
312 ret = style->font_size.computed;
313 sp_style_unref(style);
314 }
315 return ret;
316 }
318 /** Determine average stroke width, simple method */
319 // see TODO in dialogs/stroke-style.cpp on how to get rid of this eventually
320 gdouble
321 stroke_average_width (GSList const *objects)
322 {
323 if (g_slist_length ((GSList *) objects) == 0)
324 return NR_HUGE;
326 gdouble avgwidth = 0.0;
327 bool notstroked = true;
328 int n_notstroked = 0;
330 for (GSList const *l = objects; l != NULL; l = l->next) {
331 if (!SP_IS_ITEM (l->data))
332 continue;
334 NR::Matrix i2d = sp_item_i2d_affine (SP_ITEM(l->data));
336 SPObject *object = SP_OBJECT(l->data);
338 if ( object->style->stroke.type == SP_PAINT_TYPE_NONE ) {
339 ++n_notstroked; // do not count nonstroked objects
340 continue;
341 } else {
342 notstroked = false;
343 }
345 avgwidth += SP_OBJECT_STYLE (object)->stroke_width.computed * i2d.expansion();
346 }
348 if (notstroked)
349 return NR_HUGE;
351 return avgwidth / (g_slist_length ((GSList *) objects) - n_notstroked);
352 }
354 /**
355 * Write to style_res the average fill or stroke of list of objects, if applicable.
356 */
357 int
358 objects_query_fillstroke (GSList *objects, SPStyle *style_res, bool const isfill)
359 {
360 if (g_slist_length(objects) == 0) {
361 /* No objects, set empty */
362 return QUERY_STYLE_NOTHING;
363 }
365 SPIPaint *paint_res = isfill? &style_res->fill : &style_res->stroke;
366 paint_res->type = SP_PAINT_TYPE_IMPOSSIBLE;
367 paint_res->set = TRUE;
369 gfloat c[4];
370 c[0] = c[1] = c[2] = c[3] = 0.0;
371 gint num = 0;
373 gfloat prev[4];
374 prev[0] = prev[1] = prev[2] = prev[3] = 0.0;
375 bool same_color = true;
377 for (GSList const *i = objects; i != NULL; i = i->next) {
378 SPObject *obj = SP_OBJECT (i->data);
379 SPStyle *style = SP_OBJECT_STYLE (obj);
380 if (!style) continue;
382 SPIPaint *paint = isfill? &style->fill : &style->stroke;
384 // We consider paint "effectively set" for anything within text hierarchy
385 SPObject *parent = SP_OBJECT_PARENT (obj);
386 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));
388 // 1. Bail out with QUERY_STYLE_MULTIPLE_DIFFERENT if necessary
390 if ((paint_res->type != SP_PAINT_TYPE_IMPOSSIBLE) && (paint->type != paint_res->type || (paint_res->set != paint_effectively_set))) {
391 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different types of paint
392 }
394 if (paint_res->set && paint->set && paint_res->type == SP_PAINT_TYPE_PAINTSERVER) {
395 // both previous paint and this paint were a server, see if the servers are compatible
397 SPPaintServer *server_res = isfill? SP_STYLE_FILL_SERVER (style_res) : SP_STYLE_STROKE_SERVER (style_res);
398 SPPaintServer *server = isfill? SP_STYLE_FILL_SERVER (style) : SP_STYLE_STROKE_SERVER (style);
400 if (SP_IS_LINEARGRADIENT (server_res)) {
402 if (!SP_IS_LINEARGRADIENT(server))
403 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different kind of server
405 SPGradient *vector = sp_gradient_get_vector ( SP_GRADIENT (server), FALSE );
406 SPGradient *vector_res = sp_gradient_get_vector ( SP_GRADIENT (server_res), FALSE );
407 if (vector_res != vector)
408 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different gradient vectors
410 } else if (SP_IS_RADIALGRADIENT (server_res)) {
412 if (!SP_IS_RADIALGRADIENT(server))
413 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different kind of server
415 SPGradient *vector = sp_gradient_get_vector ( SP_GRADIENT (server), FALSE );
416 SPGradient *vector_res = sp_gradient_get_vector ( SP_GRADIENT (server_res), FALSE );
417 if (vector_res != vector)
418 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different gradient vectors
420 } else if (SP_IS_PATTERN (server_res)) {
422 if (!SP_IS_PATTERN(server))
423 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different kind of server
425 SPPattern *pat = pattern_getroot (SP_PATTERN (server));
426 SPPattern *pat_res = pattern_getroot (SP_PATTERN (server_res));
427 if (pat_res != pat)
428 return QUERY_STYLE_MULTIPLE_DIFFERENT; // different pattern roots
429 }
430 }
432 // 2. Sum color, copy server from paint to paint_res
434 if (paint_res->set && paint_effectively_set && paint->type == SP_PAINT_TYPE_COLOR) {
436 gfloat d[3];
437 sp_color_get_rgb_floatv (&paint->value.color, d);
439 // Check if this color is the same as previous
440 if (paint_res->type == SP_PAINT_TYPE_IMPOSSIBLE) {
441 prev[0] = d[0];
442 prev[1] = d[1];
443 prev[2] = d[2];
444 prev[3] = d[3];
445 } else {
446 if (same_color && (prev[0] != d[0] || prev[1] != d[1] || prev[2] != d[2] || prev[3] != d[3]))
447 same_color = false;
448 }
450 // average color
451 c[0] += d[0];
452 c[1] += d[1];
453 c[2] += d[2];
454 c[3] += SP_SCALE24_TO_FLOAT (isfill? style->fill_opacity.value : style->stroke_opacity.value);
455 num ++;
456 }
458 if (paint_res->set && paint_effectively_set && paint->type == SP_PAINT_TYPE_PAINTSERVER) { // copy the server
459 if (isfill) {
460 SP_STYLE_FILL_SERVER (style_res) = SP_STYLE_FILL_SERVER (style);
461 } else {
462 SP_STYLE_STROKE_SERVER (style_res) = SP_STYLE_STROKE_SERVER (style);
463 }
464 }
465 paint_res->type = paint->type;
466 paint_res->set = paint_effectively_set;
467 style_res->fill_rule.computed = style->fill_rule.computed; // no averaging on this, just use the last one
468 }
470 // After all objects processed, divide the color if necessary and return
471 if (paint_res->set && paint_res->type == SP_PAINT_TYPE_COLOR) { // set the color
472 g_assert (num >= 1);
474 c[0] /= num;
475 c[1] /= num;
476 c[2] /= num;
477 c[3] /= num;
478 sp_color_set_rgb_float(&paint_res->value.color, c[0], c[1], c[2]);
479 if (isfill) {
480 style_res->fill_opacity.value = SP_SCALE24_FROM_FLOAT (c[3]);
481 } else {
482 style_res->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (c[3]);
483 }
484 if (num > 1) {
485 if (same_color)
486 return QUERY_STYLE_MULTIPLE_SAME;
487 else
488 return QUERY_STYLE_MULTIPLE_AVERAGED;
489 } else {
490 return QUERY_STYLE_SINGLE;
491 }
492 }
494 // Not color
495 if (g_slist_length(objects) > 1) {
496 return QUERY_STYLE_MULTIPLE_SAME;
497 } else {
498 return QUERY_STYLE_SINGLE;
499 }
500 }
502 /**
503 * Write to style_res the average opacity of a list of objects.
504 */
505 int
506 objects_query_opacity (GSList *objects, SPStyle *style_res)
507 {
508 if (g_slist_length(objects) == 0) {
509 /* No objects, set empty */
510 return QUERY_STYLE_NOTHING;
511 }
513 gdouble opacity_sum = 0;
514 gdouble opacity_prev = -1;
515 bool same_opacity = true;
516 guint opacity_items = 0;
519 for (GSList const *i = objects; i != NULL; i = i->next) {
520 SPObject *obj = SP_OBJECT (i->data);
521 SPStyle *style = SP_OBJECT_STYLE (obj);
522 if (!style) continue;
524 double opacity = SP_SCALE24_TO_FLOAT(style->opacity.value);
525 opacity_sum += opacity;
526 if (opacity_prev != -1 && opacity != opacity_prev)
527 same_opacity = false;
528 opacity_prev = opacity;
529 opacity_items ++;
530 }
531 if (opacity_items > 1)
532 opacity_sum /= opacity_items;
534 style_res->opacity.value = SP_SCALE24_FROM_FLOAT(opacity_sum);
536 if (opacity_items == 0) {
537 return QUERY_STYLE_NOTHING;
538 } else if (opacity_items == 1) {
539 return QUERY_STYLE_SINGLE;
540 } else {
541 if (same_opacity)
542 return QUERY_STYLE_MULTIPLE_SAME;
543 else
544 return QUERY_STYLE_MULTIPLE_AVERAGED;
545 }
546 }
548 /**
549 * Write to style_res the average stroke width of a list of objects.
550 */
551 int
552 objects_query_strokewidth (GSList *objects, SPStyle *style_res)
553 {
554 if (g_slist_length(objects) == 0) {
555 /* No objects, set empty */
556 return QUERY_STYLE_NOTHING;
557 }
559 gdouble avgwidth = 0.0;
561 gdouble prev_sw = -1;
562 bool same_sw = true;
564 int n_stroked = 0;
566 for (GSList const *i = objects; i != NULL; i = i->next) {
567 SPObject *obj = SP_OBJECT (i->data);
568 if (!SP_IS_ITEM(obj)) continue;
569 SPStyle *style = SP_OBJECT_STYLE (obj);
570 if (!style) continue;
572 if ( style->stroke.type == SP_PAINT_TYPE_NONE ) {
573 continue;
574 }
576 n_stroked ++;
578 NR::Matrix i2d = sp_item_i2d_affine (SP_ITEM(obj));
579 double sw = style->stroke_width.computed * i2d.expansion();
581 if (prev_sw != -1 && fabs(sw - prev_sw) > 1e-3)
582 same_sw = false;
583 prev_sw = sw;
585 avgwidth += sw;
586 }
588 if (n_stroked > 1)
589 avgwidth /= (n_stroked);
591 style_res->stroke_width.computed = avgwidth;
592 style_res->stroke_width.set = true;
594 if (n_stroked == 0) {
595 return QUERY_STYLE_NOTHING;
596 } else if (n_stroked == 1) {
597 return QUERY_STYLE_SINGLE;
598 } else {
599 if (same_sw)
600 return QUERY_STYLE_MULTIPLE_SAME;
601 else
602 return QUERY_STYLE_MULTIPLE_AVERAGED;
603 }
604 }
606 /**
607 * Write to style_res the average miter limit of a list of objects.
608 */
609 int
610 objects_query_miterlimit (GSList *objects, SPStyle *style_res)
611 {
612 if (g_slist_length(objects) == 0) {
613 /* No objects, set empty */
614 return QUERY_STYLE_NOTHING;
615 }
617 gdouble avgml = 0.0;
618 int n_stroked = 0;
620 gdouble prev_ml = -1;
621 bool same_ml = true;
623 for (GSList const *i = objects; i != NULL; i = i->next) {
624 SPObject *obj = SP_OBJECT (i->data);
625 if (!SP_IS_ITEM(obj)) continue;
626 SPStyle *style = SP_OBJECT_STYLE (obj);
627 if (!style) continue;
629 if ( style->stroke.type == SP_PAINT_TYPE_NONE ) {
630 continue;
631 }
633 n_stroked ++;
635 if (prev_ml != -1 && fabs(style->stroke_miterlimit.value - prev_ml) > 1e-3)
636 same_ml = false;
637 prev_ml = style->stroke_miterlimit.value;
639 avgml += style->stroke_miterlimit.value;
640 }
642 if (n_stroked > 1)
643 avgml /= (n_stroked);
645 style_res->stroke_miterlimit.value = avgml;
646 style_res->stroke_miterlimit.set = true;
648 if (n_stroked == 0) {
649 return QUERY_STYLE_NOTHING;
650 } else if (n_stroked == 1) {
651 return QUERY_STYLE_SINGLE;
652 } else {
653 if (same_ml)
654 return QUERY_STYLE_MULTIPLE_SAME;
655 else
656 return QUERY_STYLE_MULTIPLE_AVERAGED;
657 }
658 }
660 /**
661 * Write to style_res the stroke cap of a list of objects.
662 */
663 int
664 objects_query_strokecap (GSList *objects, SPStyle *style_res)
665 {
666 if (g_slist_length(objects) == 0) {
667 /* No objects, set empty */
668 return QUERY_STYLE_NOTHING;
669 }
671 int cap = -1;
672 gdouble prev_cap = -1;
673 bool same_cap = true;
674 int n_stroked = 0;
676 for (GSList const *i = objects; i != NULL; i = i->next) {
677 SPObject *obj = SP_OBJECT (i->data);
678 if (!SP_IS_ITEM(obj)) continue;
679 SPStyle *style = SP_OBJECT_STYLE (obj);
680 if (!style) continue;
682 if ( style->stroke.type == SP_PAINT_TYPE_NONE ) {
683 continue;
684 }
686 n_stroked ++;
688 if (prev_cap != -1 && style->stroke_linecap.value != prev_cap)
689 same_cap = false;
690 prev_cap = style->stroke_linecap.value;
692 cap = style->stroke_linecap.value;
693 }
695 style_res->stroke_linecap.value = cap;
696 style_res->stroke_linecap.set = true;
698 if (n_stroked == 0) {
699 return QUERY_STYLE_NOTHING;
700 } else if (n_stroked == 1) {
701 return QUERY_STYLE_SINGLE;
702 } else {
703 if (same_cap)
704 return QUERY_STYLE_MULTIPLE_SAME;
705 else
706 return QUERY_STYLE_MULTIPLE_DIFFERENT;
707 }
708 }
710 /**
711 * Write to style_res the stroke join of a list of objects.
712 */
713 int
714 objects_query_strokejoin (GSList *objects, SPStyle *style_res)
715 {
716 if (g_slist_length(objects) == 0) {
717 /* No objects, set empty */
718 return QUERY_STYLE_NOTHING;
719 }
721 int join = -1;
722 gdouble prev_join = -1;
723 bool same_join = true;
724 int n_stroked = 0;
726 for (GSList const *i = objects; i != NULL; i = i->next) {
727 SPObject *obj = SP_OBJECT (i->data);
728 if (!SP_IS_ITEM(obj)) continue;
729 SPStyle *style = SP_OBJECT_STYLE (obj);
730 if (!style) continue;
732 if ( style->stroke.type == SP_PAINT_TYPE_NONE ) {
733 continue;
734 }
736 n_stroked ++;
738 if (prev_join != -1 && style->stroke_linejoin.value != prev_join)
739 same_join = false;
740 prev_join = style->stroke_linejoin.value;
742 join = style->stroke_linejoin.value;
743 }
745 style_res->stroke_linejoin.value = join;
746 style_res->stroke_linejoin.set = true;
748 if (n_stroked == 0) {
749 return QUERY_STYLE_NOTHING;
750 } else if (n_stroked == 1) {
751 return QUERY_STYLE_SINGLE;
752 } else {
753 if (same_join)
754 return QUERY_STYLE_MULTIPLE_SAME;
755 else
756 return QUERY_STYLE_MULTIPLE_DIFFERENT;
757 }
758 }
760 /**
761 * Write to style_res the average font size and spacing of objects.
762 */
763 int
764 objects_query_fontnumbers (GSList *objects, SPStyle *style_res)
765 {
766 bool different = false;
768 double size = 0;
769 double letterspacing = 0;
770 double linespacing = 0;
771 bool linespacing_normal = false;
772 bool letterspacing_normal = false;
774 double size_prev = 0;
775 double letterspacing_prev = 0;
776 double linespacing_prev = 0;
778 /// \todo FIXME: add word spacing, kerns? rotates?
780 int texts = 0;
782 for (GSList const *i = objects; i != NULL; i = i->next) {
783 SPObject *obj = SP_OBJECT (i->data);
785 if (!SP_IS_TEXT(obj) && !SP_IS_FLOWTEXT(obj)
786 && !SP_IS_TSPAN(obj) && !SP_IS_TEXTPATH(obj)
787 && !SP_IS_FLOWDIV(obj) && !SP_IS_FLOWPARA(obj) && !SP_IS_FLOWTSPAN(obj))
788 continue;
790 SPStyle *style = SP_OBJECT_STYLE (obj);
791 if (!style) continue;
793 texts ++;
794 size += style->font_size.computed * NR::expansion(sp_item_i2d_affine(SP_ITEM(obj))); /// \todo FIXME: we assume non-% units here
796 if (style->letter_spacing.normal) {
797 if (!different && (letterspacing_prev == 0 || letterspacing_prev == letterspacing))
798 letterspacing_normal = true;
799 } else {
800 letterspacing += style->letter_spacing.computed; /// \todo FIXME: we assume non-% units here
801 letterspacing_normal = false;
802 }
804 double linespacing_current;
805 if (style->line_height.normal) {
806 linespacing_current = Inkscape::Text::Layout::LINE_HEIGHT_NORMAL;
807 if (!different && (linespacing_prev == 0 || linespacing_prev == linespacing_current))
808 linespacing_normal = true;
809 } else if (style->line_height.unit == SP_CSS_UNIT_PERCENT || style->font_size.computed == 0) {
810 linespacing_current = style->line_height.value;
811 linespacing_normal = false;
812 } else { // we need % here
813 linespacing_current = style->line_height.computed / style->font_size.computed;
814 linespacing_normal = false;
815 }
816 linespacing += linespacing_current;
818 if ((size_prev != 0 && style->font_size.computed != size_prev) ||
819 (letterspacing_prev != 0 && style->letter_spacing.computed != letterspacing_prev) ||
820 (linespacing_prev != 0 && linespacing_current != linespacing_prev)) {
821 different = true;
822 }
824 size_prev = style->font_size.computed;
825 letterspacing_prev = style->letter_spacing.computed;
826 linespacing_prev = linespacing_current;
828 // FIXME: we must detect MULTIPLE_DIFFERENT for these too
829 style_res->text_anchor.computed = style->text_anchor.computed;
830 style_res->writing_mode.computed = style->writing_mode.computed;
831 }
833 if (texts == 0)
834 return QUERY_STYLE_NOTHING;
836 if (texts > 1) {
837 size /= texts;
838 letterspacing /= texts;
839 linespacing /= texts;
840 }
842 style_res->font_size.computed = size;
843 style_res->font_size.type = SP_FONT_SIZE_LENGTH;
845 style_res->letter_spacing.normal = letterspacing_normal;
846 style_res->letter_spacing.computed = letterspacing;
848 style_res->line_height.normal = linespacing_normal;
849 style_res->line_height.computed = linespacing;
850 style_res->line_height.value = linespacing;
851 style_res->line_height.unit = SP_CSS_UNIT_PERCENT;
853 if (texts > 1) {
854 if (different) {
855 return QUERY_STYLE_MULTIPLE_AVERAGED;
856 } else {
857 return QUERY_STYLE_MULTIPLE_SAME;
858 }
859 } else {
860 return QUERY_STYLE_SINGLE;
861 }
862 }
864 /**
865 * Write to style_res the average font style of objects.
866 */
867 int
868 objects_query_fontstyle (GSList *objects, SPStyle *style_res)
869 {
870 bool different = false;
871 bool set = false;
873 int texts = 0;
875 for (GSList const *i = objects; i != NULL; i = i->next) {
876 SPObject *obj = SP_OBJECT (i->data);
878 if (!SP_IS_TEXT(obj) && !SP_IS_FLOWTEXT(obj)
879 && !SP_IS_TSPAN(obj) && !SP_IS_TEXTPATH(obj)
880 && !SP_IS_FLOWDIV(obj) && !SP_IS_FLOWPARA(obj) && !SP_IS_FLOWTSPAN(obj))
881 continue;
883 SPStyle *style = SP_OBJECT_STYLE (obj);
884 if (!style) continue;
886 texts ++;
888 if (set &&
889 font_style_to_pos(*style_res).signature() != font_style_to_pos(*style).signature() ) {
890 different = true; // different styles
891 }
893 set = TRUE;
894 style_res->font_weight.value = style_res->font_weight.computed = style->font_weight.computed;
895 style_res->font_style.value = style_res->font_style.computed = style->font_style.computed;
896 style_res->font_stretch.value = style_res->font_stretch.computed = style->font_stretch.computed;
897 style_res->font_variant.value = style_res->font_variant.computed = style->font_variant.computed;
898 }
900 if (texts == 0 || !set)
901 return QUERY_STYLE_NOTHING;
903 if (texts > 1) {
904 if (different) {
905 return QUERY_STYLE_MULTIPLE_DIFFERENT;
906 } else {
907 return QUERY_STYLE_MULTIPLE_SAME;
908 }
909 } else {
910 return QUERY_STYLE_SINGLE;
911 }
912 }
914 /**
915 * Write to style_res the average font family of objects.
916 */
917 int
918 objects_query_fontfamily (GSList *objects, SPStyle *style_res)
919 {
920 bool different = false;
921 int texts = 0;
923 if (style_res->text->font_family.value) {
924 g_free(style_res->text->font_family.value);
925 style_res->text->font_family.value = NULL;
926 }
927 style_res->text->font_family.set = FALSE;
929 for (GSList const *i = objects; i != NULL; i = i->next) {
930 SPObject *obj = SP_OBJECT (i->data);
932 if (!SP_IS_TEXT(obj) && !SP_IS_FLOWTEXT(obj)
933 && !SP_IS_TSPAN(obj) && !SP_IS_TEXTPATH(obj)
934 && !SP_IS_FLOWDIV(obj) && !SP_IS_FLOWPARA(obj) && !SP_IS_FLOWTSPAN(obj))
935 continue;
937 SPStyle *style = SP_OBJECT_STYLE (obj);
938 if (!style) continue;
940 texts ++;
942 if (style_res->text->font_family.value && style->text->font_family.value &&
943 strcmp (style_res->text->font_family.value, style->text->font_family.value)) {
944 different = true; // different fonts
945 }
947 if (style_res->text->font_family.value) {
948 g_free(style_res->text->font_family.value);
949 style_res->text->font_family.value = NULL;
950 }
952 style_res->text->font_family.set = TRUE;
953 style_res->text->font_family.value = g_strdup(style->text->font_family.value);
954 }
956 if (texts == 0 || !style_res->text->font_family.set)
957 return QUERY_STYLE_NOTHING;
959 if (texts > 1) {
960 if (different) {
961 return QUERY_STYLE_MULTIPLE_DIFFERENT;
962 } else {
963 return QUERY_STYLE_MULTIPLE_SAME;
964 }
965 } else {
966 return QUERY_STYLE_SINGLE;
967 }
968 }
970 /**
971 * Query the given list of objects for the given property, write
972 * the result to style, return appropriate flag.
973 */
974 int
975 sp_desktop_query_style_from_list (GSList *list, SPStyle *style, int property)
976 {
977 if (property == QUERY_STYLE_PROPERTY_FILL) {
978 return objects_query_fillstroke (list, style, true);
979 } else if (property == QUERY_STYLE_PROPERTY_STROKE) {
980 return objects_query_fillstroke (list, style, false);
982 } else if (property == QUERY_STYLE_PROPERTY_STROKEWIDTH) {
983 return objects_query_strokewidth (list, style);
984 } else if (property == QUERY_STYLE_PROPERTY_STROKEMITERLIMIT) {
985 return objects_query_miterlimit (list, style);
986 } else if (property == QUERY_STYLE_PROPERTY_STROKECAP) {
987 return objects_query_strokecap (list, style);
988 } else if (property == QUERY_STYLE_PROPERTY_STROKEJOIN) {
989 return objects_query_strokejoin (list, style);
991 } else if (property == QUERY_STYLE_PROPERTY_MASTEROPACITY) {
992 return objects_query_opacity (list, style);
994 } else if (property == QUERY_STYLE_PROPERTY_FONTFAMILY) {
995 return objects_query_fontfamily (list, style);
996 } else if (property == QUERY_STYLE_PROPERTY_FONTSTYLE) {
997 return objects_query_fontstyle (list, style);
998 } else if (property == QUERY_STYLE_PROPERTY_FONTNUMBERS) {
999 return objects_query_fontnumbers (list, style);
1000 }
1002 return QUERY_STYLE_NOTHING;
1003 }
1006 /**
1007 * Query the subselection (if any) or selection on the given desktop for the given property, write
1008 * the result to style, return appropriate flag.
1009 */
1010 int
1011 sp_desktop_query_style(SPDesktop *desktop, SPStyle *style, int property)
1012 {
1013 int ret = desktop->_query_style_signal.emit(style, property);
1015 if (ret != QUERY_STYLE_NOTHING)
1016 return ret; // subselection returned a style, pass it on
1018 // otherwise, do querying and averaging over selection
1019 return sp_desktop_query_style_from_list ((GSList *) desktop->selection->itemList(), style, property);
1020 }
1022 /**
1023 * Do the same as sp_desktop_query_style for all (defined) style properties, return true if none of
1024 * the properties returned QUERY_STYLE_NOTHING.
1025 */
1026 bool
1027 sp_desktop_query_style_all (SPDesktop *desktop, SPStyle *query)
1028 {
1029 int result_family = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_FONTFAMILY);
1030 int result_fstyle = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_FONTSTYLE);
1031 int result_fnumbers = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_FONTNUMBERS);
1032 int result_fill = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_FILL);
1033 int result_stroke = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_STROKE);
1034 int result_strokewidth = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_STROKEWIDTH);
1035 int result_strokemiterlimit = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_STROKEMITERLIMIT);
1036 int result_strokecap = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_STROKECAP);
1037 int result_strokejoin = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_STROKEJOIN);
1038 int result_opacity = sp_desktop_query_style (desktop, query, QUERY_STYLE_PROPERTY_MASTEROPACITY);
1040 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);
1041 }
1044 /*
1045 Local Variables:
1046 mode:c++
1047 c-file-style:"stroustrup"
1048 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1049 indent-tabs-mode:nil
1050 fill-column:99
1051 End:
1052 */
1053 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :