forked from AuroraMiddleware/gtk
540 lines
18 KiB
C
540 lines
18 KiB
C
/*
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* Copyright © 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 2.1 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, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include "gtkcssstylepropertyprivate.h"
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#include "gtkcssstylefuncsprivate.h"
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#include "gtkcsstypesprivate.h"
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#include "gtkintl.h"
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#include "gtkprivatetypebuiltins.h"
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#include "gtkstylepropertiesprivate.h"
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#include <math.h>
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#include <cairo-gobject.h>
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#include "gtkcssimagegradientprivate.h"
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#include "gtkcssimageprivate.h"
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/* this is in case round() is not provided by the compiler,
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* such as in the case of C89 compilers, like MSVC
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*/
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#include "fallback-c89.c"
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enum {
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PROP_0,
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PROP_ID,
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PROP_SPECIFIED_TYPE,
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PROP_COMPUTED_TYPE,
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PROP_INHERIT,
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PROP_INITIAL
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};
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G_DEFINE_TYPE (GtkCssStyleProperty, _gtk_css_style_property, GTK_TYPE_STYLE_PROPERTY)
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static void
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gtk_css_style_property_constructed (GObject *object)
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{
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GtkCssStyleProperty *property = GTK_CSS_STYLE_PROPERTY (object);
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GtkCssStylePropertyClass *klass = GTK_CSS_STYLE_PROPERTY_GET_CLASS (property);
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property->id = klass->style_properties->len;
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g_ptr_array_add (klass->style_properties, property);
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G_OBJECT_CLASS (_gtk_css_style_property_parent_class)->constructed (object);
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}
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static void
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gtk_css_style_property_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkCssStyleProperty *property = GTK_CSS_STYLE_PROPERTY (object);
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const GValue *initial;
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switch (prop_id)
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{
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case PROP_INHERIT:
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property->inherit = g_value_get_boolean (value);
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break;
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case PROP_INITIAL:
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initial = g_value_get_boxed (value);
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g_assert (initial);
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g_value_init (&property->initial_value, G_VALUE_TYPE (initial));
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g_value_copy (initial, &property->initial_value);
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break;
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case PROP_COMPUTED_TYPE:
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property->computed_type = g_value_get_gtype (value);
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g_assert (property->computed_type != G_TYPE_NONE);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_css_style_property_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkCssStyleProperty *property = GTK_CSS_STYLE_PROPERTY (object);
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switch (prop_id)
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{
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case PROP_SPECIFIED_TYPE:
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g_value_set_gtype (value, G_VALUE_TYPE (&property->initial_value));
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break;
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case PROP_COMPUTED_TYPE:
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g_value_set_gtype (value, property->computed_type);
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break;
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case PROP_ID:
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g_value_set_boolean (value, property->id);
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break;
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case PROP_INHERIT:
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g_value_set_boolean (value, property->inherit);
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break;
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case PROP_INITIAL:
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g_value_set_boxed (value, &property->initial_value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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_gtk_css_style_property_assign (GtkStyleProperty *property,
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GtkStyleProperties *props,
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GtkStateFlags state,
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const GValue *value)
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{
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_gtk_style_properties_set_property_by_property (props,
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GTK_CSS_STYLE_PROPERTY (property),
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state,
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value);
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}
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static void
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_gtk_css_style_property_query (GtkStyleProperty *property,
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GValue *value,
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GtkStyleQueryFunc query_func,
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gpointer query_data)
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{
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const GValue *val;
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val = (* query_func) (GTK_CSS_STYLE_PROPERTY (property)->id, query_data);
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if (val)
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{
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/* Somebody make this a vfunc */
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if (G_VALUE_TYPE (val) == GTK_TYPE_CSS_IMAGE)
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{
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GtkCssImage *image = g_value_get_object (val);
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cairo_pattern_t *pattern;
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cairo_surface_t *surface;
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cairo_matrix_t matrix;
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if (image == NULL)
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g_value_set_boxed (value, NULL);
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else if (GTK_IS_CSS_IMAGE_GRADIENT (image))
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g_value_set_boxed (value, GTK_CSS_IMAGE_GRADIENT (image)->pattern);
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else
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{
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double width, height;
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/* the 100, 100 is rather random */
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_gtk_css_image_get_concrete_size (image, 0, 0, 100, 100, &width, &height);
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surface = _gtk_css_image_get_surface (image, NULL, width, height);
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pattern = cairo_pattern_create_for_surface (surface);
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cairo_matrix_init_scale (&matrix, width, height);
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cairo_pattern_set_matrix (pattern, &matrix);
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cairo_surface_destroy (surface);
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g_value_take_boxed (value, pattern);
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}
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}
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else if (G_VALUE_TYPE (val) == GTK_TYPE_CSS_NUMBER)
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{
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g_value_set_int (value, round (_gtk_css_number_get (g_value_get_boxed (val), 100)));
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}
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else
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g_value_copy (val, value);
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}
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else
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g_value_copy (_gtk_css_style_property_get_initial_value (GTK_CSS_STYLE_PROPERTY (property)), value);
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}
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static gboolean
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gtk_css_style_property_parse_value (GtkStyleProperty *property,
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GValue *value,
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GtkCssParser *parser,
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GFile *base)
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{
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GtkCssStyleProperty *style_property = GTK_CSS_STYLE_PROPERTY (property);
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if (_gtk_css_parser_try (parser, "initial", TRUE))
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{
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/* the initial value can be explicitly specified with the
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* ‘initial’ keyword which all properties accept.
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*/
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g_value_init (value, GTK_TYPE_CSS_SPECIAL_VALUE);
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g_value_set_enum (value, GTK_CSS_INITIAL);
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return TRUE;
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}
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else if (_gtk_css_parser_try (parser, "inherit", TRUE))
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{
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/* All properties accept the ‘inherit’ value which
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* explicitly specifies that the value will be determined
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* by inheritance. The ‘inherit’ value can be used to
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* strengthen inherited values in the cascade, and it can
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* also be used on properties that are not normally inherited.
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*/
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g_value_init (value, GTK_TYPE_CSS_SPECIAL_VALUE);
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g_value_set_enum (value, GTK_CSS_INHERIT);
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return TRUE;
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}
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g_value_init (value, _gtk_css_style_property_get_specified_type (style_property));
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if (!(* style_property->parse_value) (style_property, value, parser, base))
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{
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g_value_unset (value);
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return FALSE;
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}
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return TRUE;
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}
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static void
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_gtk_css_style_property_class_init (GtkCssStylePropertyClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
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object_class->constructed = gtk_css_style_property_constructed;
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object_class->set_property = gtk_css_style_property_set_property;
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object_class->get_property = gtk_css_style_property_get_property;
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g_object_class_install_property (object_class,
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PROP_ID,
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g_param_spec_uint ("id",
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P_("ID"),
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P_("The numeric id for quick access"),
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0, G_MAXUINT, 0,
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G_PARAM_READABLE));
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g_object_class_install_property (object_class,
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PROP_SPECIFIED_TYPE,
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g_param_spec_gtype ("specified-type",
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P_("Specified type"),
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P_("The type of values after parsing"),
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G_TYPE_NONE,
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G_PARAM_READABLE));
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g_object_class_install_property (object_class,
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PROP_COMPUTED_TYPE,
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g_param_spec_gtype ("computed-type",
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P_("Computed type"),
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P_("The type of values after style lookup"),
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G_TYPE_NONE,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
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g_object_class_install_property (object_class,
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PROP_INHERIT,
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g_param_spec_boolean ("inherit",
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P_("Inherit"),
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P_("Set if the value is inherited by default"),
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FALSE,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
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g_object_class_install_property (object_class,
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PROP_INITIAL,
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g_param_spec_boxed ("initial-value",
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P_("Initial value"),
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P_("The initial specified value used for this property"),
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G_TYPE_VALUE,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
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property_class->assign = _gtk_css_style_property_assign;
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property_class->query = _gtk_css_style_property_query;
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property_class->parse_value = gtk_css_style_property_parse_value;
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klass->style_properties = g_ptr_array_new ();
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}
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static gboolean
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gtk_css_style_property_real_parse_value (GtkCssStyleProperty *property,
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GValue *value,
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GtkCssParser *parser,
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GFile *base)
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{
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return _gtk_css_style_parse_value (value, parser, base);
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}
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static void
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gtk_css_style_property_real_print_value (GtkCssStyleProperty *property,
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const GValue *value,
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GString *string)
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{
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_gtk_css_style_print_value (value, string);
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}
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static void
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gtk_css_style_property_real_compute_value (GtkCssStyleProperty *property,
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GValue *computed,
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GtkStyleContext *context,
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const GValue *specified)
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{
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_gtk_css_style_compute_value (computed, context, specified);
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}
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static void
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_gtk_css_style_property_init (GtkCssStyleProperty *property)
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{
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property->parse_value = gtk_css_style_property_real_parse_value;
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property->print_value = gtk_css_style_property_real_print_value;
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property->compute_value = gtk_css_style_property_real_compute_value;
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}
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/**
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* _gtk_css_style_property_get_n_properties:
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*
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* Gets the number of style properties. This number can increase when new
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* theme engines are loaded. Shorthand properties are not included here.
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*
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* Returns: The number of style properties.
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**/
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guint
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_gtk_css_style_property_get_n_properties (void)
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{
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GtkCssStylePropertyClass *klass;
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klass = g_type_class_peek (GTK_TYPE_CSS_STYLE_PROPERTY);
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if (G_UNLIKELY (klass == NULL))
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{
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_gtk_style_property_init_properties ();
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klass = g_type_class_peek (GTK_TYPE_CSS_STYLE_PROPERTY);
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g_assert (klass);
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}
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return klass->style_properties->len;
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}
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/**
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* _gtk_css_style_property_lookup_by_id:
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* @id: the id of the property
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*
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* Gets the style property with the given id. All style properties (but not
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* shorthand properties) are indexable by id so that it's easy to use arrays
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* when doing style lookups.
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*
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* Returns: (transfer none): The style property with the given id
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**/
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GtkCssStyleProperty *
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_gtk_css_style_property_lookup_by_id (guint id)
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{
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GtkCssStylePropertyClass *klass;
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klass = g_type_class_peek (GTK_TYPE_CSS_STYLE_PROPERTY);
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if (G_UNLIKELY (klass == NULL))
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{
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_gtk_style_property_init_properties ();
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klass = g_type_class_peek (GTK_TYPE_CSS_STYLE_PROPERTY);
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g_assert (klass);
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}
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g_return_val_if_fail (id < klass->style_properties->len, NULL);
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return g_ptr_array_index (klass->style_properties, id);
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}
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/**
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* _gtk_css_style_property_is_inherit:
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* @property: the property
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*
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* Queries if the given @property is inherited. See
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* <ulink url="http://www.w3.org/TR/css3-cascade/#inheritance>
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* the CSS documentation</ulink> for an explanation of this concept.
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*
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* Returns: %TRUE if the property is inherited by default.
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**/
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gboolean
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_gtk_css_style_property_is_inherit (GtkCssStyleProperty *property)
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{
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g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), 0);
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return property->inherit;
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}
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/**
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* _gtk_css_style_property_get_id:
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* @property: the property
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*
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* Gets the id for the given property. IDs are used to allow using arrays
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* for style lookups.
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*
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* Returns: The id of the property
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**/
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guint
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_gtk_css_style_property_get_id (GtkCssStyleProperty *property)
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{
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g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), 0);
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return property->id;
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}
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/**
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* _gtk_css_style_property_get_initial_value:
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* @property: the property
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*
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* Queries the initial value of the given @property. See
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* <ulink url="http://www.w3.org/TR/css3-cascade/#intial>
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* the CSS documentation</ulink> for an explanation of this concept.
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*
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* Returns: a reference to the initial value. The value will never change.
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**/
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const GValue *
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_gtk_css_style_property_get_initial_value (GtkCssStyleProperty *property)
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{
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g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), NULL);
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return &property->initial_value;
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}
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/**
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* _gtk_css_style_property_get_computed_type:
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* @property: the property to query
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*
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* Gets the #GType used for values for this property after a CSS lookup has
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* happened. _gtk_css_style_property_compute_value() will convert values to
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* this type.
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*
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* Returns: the #GType used for computed values.
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**/
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GType
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_gtk_css_style_property_get_computed_type (GtkCssStyleProperty *property)
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{
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g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), G_TYPE_NONE);
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return property->computed_type;
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}
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/**
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* _gtk_css_style_property_get_specified_type:
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* @property: the property to query
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*
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* Gets the #GType used for values for this property after CSS parsing if
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* the value is not a special keyword. _gtk_css_style_property_compute_value()
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* will convert values of this type to the computed type.
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*
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* The initial value returned by _gtk_css_style_property_get_initial_value()
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* will be of this type.
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*
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* Returns: the #GType used for specified values.
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**/
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GType
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_gtk_css_style_property_get_specified_type (GtkCssStyleProperty *property)
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{
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g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), G_TYPE_NONE);
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return G_VALUE_TYPE (&property->initial_value);
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}
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gboolean
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_gtk_css_style_property_is_specified_type (GtkCssStyleProperty *property,
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GType type)
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{
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g_return_val_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property), FALSE);
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/* If it's our specified type, of course it's valid */
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if (type == G_VALUE_TYPE (&property->initial_value))
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return TRUE;
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/* The special values 'inherit' and 'initial' are always valid */
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if (type == GTK_TYPE_CSS_SPECIAL_VALUE)
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return TRUE;
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/* XXX: Someone needs to fix that legacy */
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if (G_VALUE_TYPE (&property->initial_value) == CAIRO_GOBJECT_TYPE_PATTERN &&
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type == GTK_TYPE_GRADIENT)
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return TRUE;
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return FALSE;
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}
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/**
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* _gtk_css_style_property_compute_value:
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* @property: the property
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* @computed: (out): an uninitialized value to be filled with the result
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* @context: the context to use for resolving
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* @specified: the value to compute from
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*
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* Converts the @specified value into the @computed value using the
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* information in @context. This step is explained in detail in
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* <ulink url="http://www.w3.org/TR/css3-cascade/#computed>
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* the CSS documentation</ulink>.
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**/
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void
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_gtk_css_style_property_compute_value (GtkCssStyleProperty *property,
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GValue *computed,
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GtkStyleContext *context,
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const GValue *specified)
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{
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g_return_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property));
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g_return_if_fail (computed != NULL && !G_IS_VALUE (computed));
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (G_IS_VALUE (specified));
|
||
|
||
g_value_init (computed, _gtk_css_style_property_get_computed_type (property));
|
||
|
||
property->compute_value (property, computed, context, specified);
|
||
}
|
||
|
||
/**
|
||
* _gtk_css_style_property_print_value:
|
||
* @property: the property
|
||
* @value: the value to print
|
||
* @string: the string to print to
|
||
*
|
||
* Prints @value to the given @string in CSS format. The @value must be a
|
||
* valid specified value as parsed using the parse functions or as assigned
|
||
* via _gtk_style_property_assign().
|
||
**/
|
||
void
|
||
_gtk_css_style_property_print_value (GtkCssStyleProperty *property,
|
||
const GValue *value,
|
||
GString *string)
|
||
{
|
||
g_return_if_fail (GTK_IS_CSS_STYLE_PROPERTY (property));
|
||
g_return_if_fail (value != NULL);
|
||
g_return_if_fail (string != NULL);
|
||
|
||
if (G_VALUE_HOLDS (value, GTK_TYPE_CSS_SPECIAL_VALUE))
|
||
{
|
||
GEnumClass *enum_class;
|
||
GEnumValue *enum_value;
|
||
|
||
enum_class = g_type_class_ref (GTK_TYPE_CSS_SPECIAL_VALUE);
|
||
enum_value = g_enum_get_value (enum_class, g_value_get_enum (value));
|
||
|
||
g_string_append (string, enum_value->value_nick);
|
||
|
||
g_type_class_unref (enum_class);
|
||
}
|
||
else
|
||
property->print_value (property, value, string);
|
||
}
|
||
|