forked from AuroraMiddleware/gtk
1454ba15ba
Here's the shortest description of the bug I can come up with:
When computing values, we have 3 kinds of dependencies:
(1) other properties ("currentColor" or em values)
(2) inherited properties ("inherit")
(3) generic things from the theme (@keyframes or @define-color)
Previously, we passed the GtkStyleContext as an argument, because it
provided these 3 things using:
(1) _gtk_style_context_peek_property()
(2) _gtk_style_context_peek_property(gtk_style_context_get_parent())
(3) context->priv->cascade
However, this makes it impossible to lookup values other than the ones
accessible via _gtk_style_context_peek_property(). And this is exactly
what we are doing in gtk_style_context_update_cache(). So when the cache
updates encountered case (1), they were looking up the values from the
wrong style data.
So this large patch essentially does nothing but replace the
context argument in all compute functions with new arguments for the 3
cases above:
(1) values
(2) parent_values
(3) provider
We apparently have a lot of computing code.
277 lines
8.3 KiB
C
277 lines
8.3 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkcssbgsizevalueprivate.h"
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#include "gtkcssnumbervalueprivate.h"
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struct _GtkCssValue {
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GTK_CSS_VALUE_BASE
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guint cover :1;
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guint contain :1;
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GtkCssValue *x;
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GtkCssValue *y;
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};
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static void
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gtk_css_value_bg_size_free (GtkCssValue *value)
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{
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if (value->x)
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_gtk_css_value_unref (value->x);
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if (value->y)
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_gtk_css_value_unref (value->y);
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g_slice_free (GtkCssValue, value);
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}
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static GtkCssValue *
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gtk_css_value_bg_size_compute (GtkCssValue *value,
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guint property_id,
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GtkStyleProviderPrivate *provider,
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GtkCssComputedValues *values,
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GtkCssComputedValues *parent_values,
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GtkCssDependencies *dependencies)
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{
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GtkCssValue *x, *y;
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GtkCssDependencies x_deps, y_deps;
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if (value->x == NULL && value->y == NULL)
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return _gtk_css_value_ref (value);
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x_deps = y_deps = 0;
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x = y = NULL;
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if (value->x)
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x = _gtk_css_value_compute (value->x, property_id, provider, values, parent_values, &x_deps);
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if (value->y)
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y = _gtk_css_value_compute (value->y, property_id, provider, values, parent_values, &y_deps);
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*dependencies = _gtk_css_dependencies_union (x_deps, y_deps);
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return _gtk_css_bg_size_value_new (value->x ? x : NULL,
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value->y ? y : NULL);
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}
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static gboolean
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gtk_css_value_bg_size_equal (const GtkCssValue *value1,
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const GtkCssValue *value2)
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{
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return value1->cover == value2->cover &&
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value2->contain == value2->contain &&
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(value1->x == value2->x ||
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(value1->x != NULL && value2->x != NULL &&
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_gtk_css_value_equal (value1->x, value2->x))) &&
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(value1->y == value2->y ||
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(value1->y != NULL && value2->y != NULL &&
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_gtk_css_value_equal (value1->y, value2->y)));
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}
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static GtkCssValue *
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gtk_css_value_bg_size_transition (GtkCssValue *start,
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GtkCssValue *end,
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guint property_id,
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double progress)
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{
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GtkCssValue *x, *y;
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if (start->cover)
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return end->cover ? _gtk_css_value_ref (end) : NULL;
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if (start->contain)
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return end->contain ? _gtk_css_value_ref (end) : NULL;
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if ((start->x != NULL) ^ (end->x != NULL) ||
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(start->y != NULL) ^ (end->y != NULL))
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return NULL;
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if (start->x)
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{
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x = _gtk_css_value_transition (start->x, end->x, property_id, progress);
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if (x == NULL)
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return NULL;
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}
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else
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x = NULL;
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if (start->y)
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{
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y = _gtk_css_value_transition (start->y, end->y, property_id, progress);
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if (y == NULL)
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{
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_gtk_css_value_unref (x);
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return NULL;
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}
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}
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else
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y = NULL;
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return _gtk_css_bg_size_value_new (x, y);
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}
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static void
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gtk_css_value_bg_size_print (const GtkCssValue *value,
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GString *string)
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{
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if (value->cover)
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g_string_append (string, "cover");
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else if (value->contain)
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g_string_append (string, "contain");
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else
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{
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if (value->x == NULL)
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g_string_append (string, "auto");
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else
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_gtk_css_value_print (value->x, string);
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if (value->y)
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{
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g_string_append_c (string, ' ');
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_gtk_css_value_print (value->y, string);
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}
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}
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}
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static const GtkCssValueClass GTK_CSS_VALUE_BG_SIZE = {
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gtk_css_value_bg_size_free,
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gtk_css_value_bg_size_compute,
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gtk_css_value_bg_size_equal,
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gtk_css_value_bg_size_transition,
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gtk_css_value_bg_size_print
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};
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static GtkCssValue auto_singleton = { >K_CSS_VALUE_BG_SIZE, 1, FALSE, FALSE, NULL, NULL };
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static GtkCssValue cover_singleton = { >K_CSS_VALUE_BG_SIZE, 1, TRUE, FALSE, NULL, NULL };
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static GtkCssValue contain_singleton = { >K_CSS_VALUE_BG_SIZE, 1, FALSE, TRUE, NULL, NULL };
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GtkCssValue *
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_gtk_css_bg_size_value_new (GtkCssValue *x,
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GtkCssValue *y)
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{
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GtkCssValue *result;
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if (x == NULL && y == NULL)
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return _gtk_css_value_ref (&auto_singleton);
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result = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_BG_SIZE);
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result->x = x;
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result->y = y;
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return result;
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}
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GtkCssValue *
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_gtk_css_bg_size_value_parse (GtkCssParser *parser)
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{
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GtkCssValue *x, *y;
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if (_gtk_css_parser_try (parser, "cover", TRUE))
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return _gtk_css_value_ref (&cover_singleton);
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else if (_gtk_css_parser_try (parser, "contain", TRUE))
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return _gtk_css_value_ref (&contain_singleton);
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if (_gtk_css_parser_try (parser, "auto", TRUE))
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x = NULL;
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else
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{
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x = _gtk_css_number_value_parse (parser,
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GTK_CSS_POSITIVE_ONLY
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| GTK_CSS_PARSE_PERCENT
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| GTK_CSS_PARSE_LENGTH);
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if (x == NULL)
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return NULL;
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}
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if (_gtk_css_parser_try (parser, "auto", TRUE))
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y = NULL;
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else if (!_gtk_css_parser_has_number (parser))
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y = NULL;
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else
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{
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y = _gtk_css_number_value_parse (parser,
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GTK_CSS_POSITIVE_ONLY
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| GTK_CSS_PARSE_PERCENT
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| GTK_CSS_PARSE_LENGTH);
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if (y == NULL)
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{
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_gtk_css_value_unref (x);
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return NULL;
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}
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}
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return _gtk_css_bg_size_value_new (x, y);
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}
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static void
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gtk_css_bg_size_compute_size_for_cover_contain (gboolean cover,
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GtkCssImage *image,
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double width,
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double height,
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double *concrete_width,
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double *concrete_height)
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{
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double aspect, image_aspect;
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image_aspect = _gtk_css_image_get_aspect_ratio (image);
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if (image_aspect == 0.0)
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{
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*concrete_width = width;
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*concrete_height = height;
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return;
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}
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aspect = width / height;
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if ((aspect >= image_aspect && cover) ||
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(aspect < image_aspect && !cover))
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{
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*concrete_width = width;
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*concrete_height = width / image_aspect;
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}
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else
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{
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*concrete_height = height;
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*concrete_width = height * image_aspect;
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}
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}
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void
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_gtk_css_bg_size_value_compute_size (const GtkCssValue *value,
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GtkCssImage *image,
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double area_width,
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double area_height,
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double *out_width,
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double *out_height)
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{
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g_return_if_fail (value->class == >K_CSS_VALUE_BG_SIZE);
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if (value->contain || value->cover)
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gtk_css_bg_size_compute_size_for_cover_contain (value->cover,
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image,
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area_width, area_height,
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out_width, out_height);
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else
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_gtk_css_image_get_concrete_size (image,
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/* note: 0 does the right thing here for 'auto' */
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value->x ? _gtk_css_number_value_get (value->x, area_width) : 0,
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value->y ? _gtk_css_number_value_get (value->y, area_height) : 0,
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area_width, area_height,
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out_width, out_height);
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}
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