Commit 03370c6e authored by Carlos Garnacho's avatar Carlos Garnacho

GtkStyleContext: Add methods to get style property values.

parent bf122274
......@@ -20,17 +20,20 @@
#include "config.h"
#include <gdk/gdk.h>
#include <stdlib.h>
#include "gtkstylecontext.h"
#include "gtktypebuiltins.h"
#include "gtkthemingengine.h"
#include "gtkintl.h"
#include "gtkwidget.h"
#include "gtkalias.h"
typedef struct GtkStyleContextPrivate GtkStyleContextPrivate;
typedef struct GtkStyleProviderData GtkStyleProviderData;
typedef struct GtkChildClass GtkChildClass;
typedef struct PropertyValue PropertyValue;
struct GtkChildClass
{
......@@ -44,12 +47,23 @@ struct GtkStyleProviderData
guint priority;
};
struct PropertyValue
{
GType widget_type;
GParamSpec *pspec;
GValue value;
};
struct GtkStyleContextPrivate
{
GList *providers;
GList *providers_last;
GtkStyleSet *store;
GtkWidgetPath *widget_path;
GArray *property_cache;
GtkStateFlags state_flags;
GList *style_classes;
GList *child_style_classes;
......@@ -104,6 +118,30 @@ style_provider_data_free (GtkStyleProviderData *data)
g_slice_free (GtkStyleProviderData, data);
}
static void
clear_property_cache (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
if (priv->property_cache)
{
guint i;
for (i = 0; i < priv->property_cache->len; i++)
{
PropertyValue *node = &g_array_index (priv->property_cache, PropertyValue, i);
g_param_spec_unref (node->pspec);
g_value_unset (&node->value);
}
g_array_free (priv->property_cache, TRUE);
priv->property_cache = NULL;
}
}
static void
gtk_style_context_finalize (GObject *object)
{
......@@ -114,6 +152,8 @@ gtk_style_context_finalize (GObject *object)
g_list_foreach (priv->providers, (GFunc) style_provider_data_free, NULL);
g_list_free (priv->providers);
clear_property_cache (GTK_STYLE_CONTEXT (object));
G_OBJECT_CLASS (gtk_style_context_parent_class)->finalize (object);
}
......@@ -205,8 +245,13 @@ gtk_style_context_add_provider (GtkStyleContext *context,
if (!added)
priv->providers = g_list_append (priv->providers, new_data);
priv->providers_last = g_list_last (priv->providers);
if (priv->widget_path)
rebuild_properties (context);
{
rebuild_properties (context);
clear_property_cache (context);
}
}
void
......@@ -243,8 +288,16 @@ gtk_style_context_remove_provider (GtkStyleContext *context,
list = list->next;
}
if (removed && priv->widget_path)
rebuild_properties (context);
if (removed)
{
priv->providers_last = g_list_last (priv->providers);
if (priv->widget_path)
{
rebuild_properties (context);
clear_property_cache (context);
}
}
}
void
......@@ -371,6 +424,7 @@ gtk_style_context_set_path (GtkStyleContext *context,
{
priv->widget_path = gtk_widget_path_copy (path);
rebuild_properties (context);
clear_property_cache (context);
}
}
......@@ -623,6 +677,127 @@ gtk_style_context_has_child_class (GtkStyleContext *context,
return FALSE;
}
static gint
style_property_values_cmp (gconstpointer bsearch_node1,
gconstpointer bsearch_node2)
{
const PropertyValue *val1 = bsearch_node1;
const PropertyValue *val2 = bsearch_node2;
if (val1->widget_type == val2->widget_type)
return val1->pspec < val2->pspec ? -1 : val1->pspec == val2->pspec ? 0 : 1;
else
return val1->widget_type < val2->widget_type ? -1 : 1;
}
const GValue *
_gtk_style_context_peek_style_property (GtkStyleContext *context,
GType widget_type,
GParamSpec *pspec)
{
GtkStyleContextPrivate *priv;
PropertyValue *pcache, key = { 0 };
GList *list;
guint i;
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
key.widget_type = widget_type;
key.pspec = pspec;
/* need value cache array */
if (!priv->property_cache)
priv->property_cache = g_array_new (FALSE, FALSE, sizeof (PropertyValue));
else
{
pcache = bsearch (&key,
priv->property_cache->data, priv->property_cache->len,
sizeof (PropertyValue), style_property_values_cmp);
if (pcache)
return &pcache->value;
}
i = 0;
while (i < priv->property_cache->len &&
style_property_values_cmp (&key, &g_array_index (priv->property_cache, PropertyValue, i)) >= 0)
i++;
g_array_insert_val (priv->property_cache, i, key);
pcache = &g_array_index (priv->property_cache, PropertyValue, i);
/* cache miss, initialize value type, then set contents */
g_param_spec_ref (pcache->pspec);
g_value_init (&pcache->value, G_PARAM_SPEC_VALUE_TYPE (pspec));
if (priv->widget_path)
{
for (list = priv->providers_last; list; list = list->prev)
{
GtkStyleProviderData *data;
data = list->data;
if (gtk_style_provider_get_style_property (data->provider, priv->widget_path,
pspec->name, &pcache->value))
return &pcache->value;
}
}
/* not supplied by any provider, revert to default */
g_param_value_set_default (pspec, &pcache->value);
return &pcache->value;
}
void
gtk_style_context_get_style_property (GtkStyleContext *context,
const gchar *property_name,
GValue *value)
{
GtkStyleContextPrivate *priv;
GtkWidgetClass *widget_class;
GParamSpec *pspec;
const GValue *peek_value;
GType widget_type;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (property_name != NULL);
g_return_if_fail (value != NULL);
priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
if (!priv->widget_path)
return;
widget_type = gtk_widget_path_get_widget_type (priv->widget_path);
widget_class = g_type_class_ref (widget_type);
pspec = gtk_widget_class_find_style_property (widget_class, property_name);
g_type_class_unref (widget_class);
if (!pspec)
{
g_warning ("%s: widget class `%s' has no style property named `%s'",
G_STRLOC,
g_type_name (widget_type),
property_name);
return;
}
peek_value = _gtk_style_context_peek_style_property (context,
widget_type,
pspec);
if (G_VALUE_TYPE (value) == G_VALUE_TYPE (peek_value))
g_value_copy (peek_value, value);
else if (g_value_type_transformable (G_VALUE_TYPE (peek_value), G_VALUE_TYPE (value)))
g_value_transform (peek_value, value);
else
g_warning ("can't retrieve style property `%s' of type `%s' as value of type `%s'",
pspec->name,
G_VALUE_TYPE_NAME (peek_value),
G_VALUE_TYPE_NAME (value));
}
/* Paint methods */
void
......
......@@ -95,6 +95,15 @@ gboolean gtk_style_context_has_child_class (GtkStyleContext *context,
const gchar *class_name,
GtkChildClassFlags *flags_return);
void gtk_style_context_get_style_property (GtkStyleContext *context,
const gchar *property_name,
GValue *value);
/* Semi-private API */
const GValue * _gtk_style_context_peek_style_property (GtkStyleContext *context,
GType widget_type,
GParamSpec *pspec);
/* Paint methods */
void gtk_render_check (GtkStyleContext *context,
cairo_t *cr,
......
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