1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 2011 Red Hat, Inc.
4 * Author: Cosimo Cecchi <cosimoc@gnome.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
22 #include "gtkcssshadowvalueprivate.h"
24 #include "gtkcairoblurprivate.h"
25 #include "gtkcsscolorvalueprivate.h"
26 #include "gtkcssnumbervalueprivate.h"
27 #include "gtkcssrgbavalueprivate.h"
28 #include "gtkstylecontextprivate.h"
29 #include "gtkthemingengineprivate.h"
44 static GtkCssValue * gtk_css_shadow_value_new (GtkCssValue *hoffset,
52 gtk_css_value_shadow_free (GtkCssValue *shadow)
54 _gtk_css_value_unref (shadow->hoffset);
55 _gtk_css_value_unref (shadow->voffset);
56 _gtk_css_value_unref (shadow->radius);
57 _gtk_css_value_unref (shadow->spread);
58 _gtk_css_value_unref (shadow->color);
60 g_slice_free (GtkCssValue, shadow);
64 gtk_css_value_shadow_compute (GtkCssValue *shadow,
66 GtkStyleProviderPrivate *provider,
67 GtkCssComputedValues *values,
68 GtkCssComputedValues *parent_values,
69 GtkCssDependencies *dependencies)
71 GtkCssValue *hoffset, *voffset, *radius, *spread, *color;
72 GtkCssDependencies child_deps;
75 hoffset = _gtk_css_value_compute (shadow->hoffset, property_id, provider, values, parent_values, &child_deps);
76 *dependencies = _gtk_css_dependencies_union (*dependencies, child_deps);
79 voffset = _gtk_css_value_compute (shadow->voffset, property_id, provider, values, parent_values, &child_deps);
80 *dependencies = _gtk_css_dependencies_union (*dependencies, child_deps);
83 radius = _gtk_css_value_compute (shadow->radius, property_id, provider, values, parent_values, &child_deps);
84 *dependencies = _gtk_css_dependencies_union (*dependencies, child_deps);
87 spread = _gtk_css_value_compute (shadow->spread, property_id, provider, values, parent_values, &child_deps),
88 *dependencies = _gtk_css_dependencies_union (*dependencies, child_deps);
91 color = _gtk_css_value_compute (shadow->color, property_id, provider, values, parent_values, &child_deps);
92 *dependencies = _gtk_css_dependencies_union (*dependencies, child_deps);
94 return gtk_css_shadow_value_new (hoffset, voffset, radius, spread, shadow->inset, color);
98 gtk_css_value_shadow_equal (const GtkCssValue *shadow1,
99 const GtkCssValue *shadow2)
101 return shadow1->inset == shadow2->inset
102 && _gtk_css_value_equal (shadow1->hoffset, shadow2->hoffset)
103 && _gtk_css_value_equal (shadow1->voffset, shadow2->voffset)
104 && _gtk_css_value_equal (shadow1->radius, shadow2->radius)
105 && _gtk_css_value_equal (shadow1->spread, shadow2->spread)
106 && _gtk_css_value_equal (shadow1->color, shadow2->color);
110 gtk_css_value_shadow_transition (GtkCssValue *start,
115 if (start->inset != end->inset)
118 return gtk_css_shadow_value_new (_gtk_css_value_transition (start->hoffset, end->hoffset, property_id, progress),
119 _gtk_css_value_transition (start->voffset, end->voffset, property_id, progress),
120 _gtk_css_value_transition (start->radius, end->radius, property_id, progress),
121 _gtk_css_value_transition (start->spread, end->spread, property_id, progress),
123 _gtk_css_value_transition (start->color, end->color, property_id, progress));
127 gtk_css_value_shadow_print (const GtkCssValue *shadow,
130 _gtk_css_value_print (shadow->hoffset, string);
131 g_string_append_c (string, ' ');
132 _gtk_css_value_print (shadow->voffset, string);
133 g_string_append_c (string, ' ');
134 if (_gtk_css_number_value_get (shadow->radius, 100) != 0 ||
135 _gtk_css_number_value_get (shadow->spread, 100) != 0)
137 _gtk_css_value_print (shadow->radius, string);
138 g_string_append_c (string, ' ');
141 if (_gtk_css_number_value_get (shadow->spread, 100) != 0)
143 _gtk_css_value_print (shadow->spread, string);
144 g_string_append_c (string, ' ');
147 _gtk_css_value_print (shadow->color, string);
150 g_string_append (string, " inset");
154 static const GtkCssValueClass GTK_CSS_VALUE_SHADOW = {
155 gtk_css_value_shadow_free,
156 gtk_css_value_shadow_compute,
157 gtk_css_value_shadow_equal,
158 gtk_css_value_shadow_transition,
159 gtk_css_value_shadow_print
163 gtk_css_shadow_value_new (GtkCssValue *hoffset,
164 GtkCssValue *voffset,
172 retval = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_SHADOW);
174 retval->hoffset = hoffset;
175 retval->voffset = voffset;
176 retval->radius = radius;
177 retval->spread = spread;
178 retval->inset = inset;
179 retval->color = color;
185 _gtk_css_shadow_value_new_for_transition (GtkCssValue *target)
187 GdkRGBA transparent = { 0, 0, 0, 0 };
189 g_return_val_if_fail (target->class == >K_CSS_VALUE_SHADOW, NULL);
191 return gtk_css_shadow_value_new (_gtk_css_number_value_new (0, GTK_CSS_PX),
192 _gtk_css_number_value_new (0, GTK_CSS_PX),
193 _gtk_css_number_value_new (0, GTK_CSS_PX),
194 _gtk_css_number_value_new (0, GTK_CSS_PX),
196 _gtk_css_rgba_value_new_from_rgba (&transparent));
200 value_is_done_parsing (GtkCssParser *parser)
202 return _gtk_css_parser_is_eof (parser) ||
203 _gtk_css_parser_begins_with (parser, ',') ||
204 _gtk_css_parser_begins_with (parser, ';') ||
205 _gtk_css_parser_begins_with (parser, '}');
209 _gtk_css_shadow_value_parse (GtkCssParser *parser)
219 GtkCssValue *values[N_VALUES] = { NULL, };
223 inset = _gtk_css_parser_try (parser, "inset", TRUE);
227 if (values[HOFFSET] == NULL &&
228 _gtk_css_parser_has_number (parser))
230 values[HOFFSET] = _gtk_css_number_value_parse (parser,
232 | GTK_CSS_NUMBER_AS_PIXELS);
233 if (values[HOFFSET] == NULL)
236 values[VOFFSET] = _gtk_css_number_value_parse (parser,
238 | GTK_CSS_NUMBER_AS_PIXELS);
239 if (values[VOFFSET] == NULL)
242 if (_gtk_css_parser_has_number (parser))
244 values[RADIUS] = _gtk_css_number_value_parse (parser,
246 | GTK_CSS_POSITIVE_ONLY
247 | GTK_CSS_NUMBER_AS_PIXELS);
248 if (values[RADIUS] == NULL)
252 values[RADIUS] = _gtk_css_number_value_new (0.0, GTK_CSS_PX);
254 if (_gtk_css_parser_has_number (parser))
256 values[SPREAD] = _gtk_css_number_value_parse (parser,
258 | GTK_CSS_NUMBER_AS_PIXELS);
259 if (values[SPREAD] == NULL)
263 values[SPREAD] = _gtk_css_number_value_new (0.0, GTK_CSS_PX);
265 else if (!inset && _gtk_css_parser_try (parser, "inset", TRUE))
267 if (values[HOFFSET] == NULL)
272 else if (values[COLOR] == NULL)
274 values[COLOR] = _gtk_css_color_value_parse (parser);
276 if (values[COLOR] == NULL)
281 /* We parsed everything and there's still stuff left?
282 * Pretend we didn't notice and let the normal code produce
283 * a 'junk at end of value' error */
287 while (values[HOFFSET] == NULL || !value_is_done_parsing (parser));
289 if (values[COLOR] == NULL)
290 values[COLOR] = _gtk_css_color_value_new_current_color ();
292 return gtk_css_shadow_value_new (values[HOFFSET], values[VOFFSET],
293 values[RADIUS], values[SPREAD],
294 inset, values[COLOR]);
297 for (i = 0; i < N_VALUES; i++)
300 _gtk_css_value_unref (values[i]);
306 static const cairo_user_data_key_t shadow_key;
309 gtk_css_shadow_value_start_drawing (const GtkCssValue *shadow,
312 cairo_rectangle_int_t clip_rect;
313 cairo_surface_t *surface;
317 radius = _gtk_css_number_value_get (shadow->radius, 0);
321 gdk_cairo_get_clip_rectangle (cr, &clip_rect);
323 /* Create a larger surface to center the blur. */
324 surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
325 clip_rect.width + 2 * radius,
326 clip_rect.height + 2 * radius);
327 cairo_surface_set_device_offset (surface, radius - clip_rect.x, radius - clip_rect.y);
328 blur_cr = cairo_create (surface);
329 cairo_set_user_data (blur_cr, &shadow_key, cairo_reference (cr), (cairo_destroy_func_t) cairo_destroy);
331 if (cairo_has_current_point (cr))
335 cairo_get_current_point (cr, &x, &y);
336 cairo_move_to (blur_cr, x, y);
343 gtk_css_shadow_value_finish_drawing (const GtkCssValue *shadow,
347 cairo_t *original_cr;
348 cairo_surface_t *surface;
350 radius = _gtk_css_number_value_get (shadow->radius, 0);
354 surface = cairo_get_target (cr);
355 original_cr = cairo_get_user_data (cr, &shadow_key);
357 /* Blur the surface. */
358 _gtk_cairo_blur_surface (surface, radius);
360 cairo_set_source_surface (original_cr, surface, 0, 0);
361 cairo_paint (original_cr);
364 cairo_surface_destroy (surface);
370 _gtk_css_shadow_value_paint_layout (const GtkCssValue *shadow,
374 g_return_if_fail (shadow->class == >K_CSS_VALUE_SHADOW);
376 if (!cairo_has_current_point (cr))
377 cairo_move_to (cr, 0, 0);
381 cairo_rel_move_to (cr,
382 _gtk_css_number_value_get (shadow->hoffset, 0),
383 _gtk_css_number_value_get (shadow->voffset, 0));
385 cr = gtk_css_shadow_value_start_drawing (shadow, cr);
387 gdk_cairo_set_source_rgba (cr, _gtk_css_rgba_value_get_rgba (shadow->color));
388 _gtk_pango_fill_layout (cr, layout);
390 cr = gtk_css_shadow_value_finish_drawing (shadow, cr);
392 cairo_rel_move_to (cr,
393 - _gtk_css_number_value_get (shadow->hoffset, 0),
394 - _gtk_css_number_value_get (shadow->voffset, 0));
399 _gtk_css_shadow_value_paint_icon (const GtkCssValue *shadow,
402 cairo_pattern_t *pattern;
404 g_return_if_fail (shadow->class == >K_CSS_VALUE_SHADOW);
407 pattern = cairo_pattern_reference (cairo_get_source (cr));
409 cr = gtk_css_shadow_value_start_drawing (shadow, cr);
411 gdk_cairo_set_source_rgba (cr, _gtk_css_rgba_value_get_rgba (shadow->color));
414 _gtk_css_number_value_get (shadow->hoffset, 0),
415 _gtk_css_number_value_get (shadow->voffset, 0));
416 cairo_mask (cr, pattern);
418 cr = gtk_css_shadow_value_finish_drawing (shadow, cr);
421 cairo_pattern_destroy (pattern);
425 _gtk_css_shadow_value_paint_spinner (const GtkCssValue *shadow,
430 g_return_if_fail (shadow->class == >K_CSS_VALUE_SHADOW);
434 cr = gtk_css_shadow_value_start_drawing (shadow, cr);
437 _gtk_css_number_value_get (shadow->hoffset, 0),
438 _gtk_css_number_value_get (shadow->voffset, 0));
439 _gtk_theming_engine_paint_spinner (cr,
441 _gtk_css_rgba_value_get_rgba (shadow->color));
443 cr = gtk_css_shadow_value_finish_drawing (shadow, cr);
449 _gtk_css_shadow_value_paint_box (const GtkCssValue *shadow,
451 const GtkRoundedBox *padding_box)
453 GtkRoundedBox box, clip_box;
454 double spread, radius;
456 g_return_if_fail (shadow->class == >K_CSS_VALUE_SHADOW);
460 _gtk_rounded_box_path (padding_box, cr);
464 _gtk_rounded_box_move (&box,
465 _gtk_css_number_value_get (shadow->hoffset, 0),
466 _gtk_css_number_value_get (shadow->voffset, 0));
467 spread = _gtk_css_number_value_get (shadow->spread, 0);
468 _gtk_rounded_box_shrink (&box, spread, spread, spread, spread);
470 clip_box = *padding_box;
471 radius = _gtk_css_number_value_get (shadow->radius, 0);
472 _gtk_rounded_box_shrink (&clip_box, -radius, -radius, -radius, -radius);
474 cr = gtk_css_shadow_value_start_drawing (shadow, cr);
476 cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
477 _gtk_rounded_box_path (&box, cr);
478 _gtk_rounded_box_clip_path (&clip_box, cr);
480 gdk_cairo_set_source_rgba (cr, _gtk_css_rgba_value_get_rgba (shadow->color));
483 cr = gtk_css_shadow_value_finish_drawing (shadow, cr);