AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity
d46aa9f49e
gtk2/gtk/gtkstylecontext.c
Christian Hergert a8a56e8a0e marshallers: ensure g_cclosure_marshal_VOID__VOIDv is used 
If we set c_marshaller manually, then g_signal_newv() will not setup a
va_marshaller for us. However, if we provide c_marshaller as NULL, it will
setup both the c_marshaller (to g_cclosure_marshal_VOID__VOID) and
va_marshaller (to g_cclosure_marshal_VOID__VOIDv) for us.
2019-05-29 13:30:15 -07:00

3177 lines
93 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkstylecontextprivate.h"
#include <gdk/gdk.h>
#include <math.h>
#include <stdlib.h>
#include <gobject/gvaluecollector.h>
#include "gtkcontainerprivate.h"
#include "gtkcssanimatedstyleprivate.h"
#include "gtkcsscolorvalueprivate.h"
#include "gtkcssenumvalueprivate.h"
#include "gtkcssimagevalueprivate.h"
#include "gtkcssnodedeclarationprivate.h"
#include "gtkcssnodeprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkcsspathnodeprivate.h"
#include "gtkcssrgbavalueprivate.h"
#include "gtkcsscolorvalueprivate.h"
#include "gtkcssshadowsvalueprivate.h"
#include "gtkcssstaticstyleprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkcsstransformvalueprivate.h"
#include "gtkcsstransientnodeprivate.h"
#include "gtkcsswidgetnodeprivate.h"
#include "gtkdebug.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtkrenderbackgroundprivate.h"
#include "gtkrendericonprivate.h"
#include "gtksettings.h"
#include "gtksettingsprivate.h"
#include "gtkstylecascadeprivate.h"
#include "gtkstyleproviderprivate.h"
#include "gtktypebuiltins.h"
#include "gtkwindow.h"
#include "gtkwidgetpath.h"
#include "gtkwidgetprivate.h"
#include "deprecated/gtkgradientprivate.h"
#include "deprecated/gtksymboliccolorprivate.h"
#include "fallback-c89.c"
/**
* SECTION:gtkstylecontext
* @Short_description: Rendering UI elements
* @Title: GtkStyleContext
*
* #GtkStyleContext is an object that stores styling information affecting
* a widget defined by #GtkWidgetPath.
*
* In order to construct the final style information, #GtkStyleContext
* queries information from all attached #GtkStyleProviders. Style providers
* can be either attached explicitly to the context through
* gtk_style_context_add_provider(), or to the screen through
* gtk_style_context_add_provider_for_screen(). The resulting style is a
* combination of all providers’ information in priority order.
*
* For GTK+ widgets, any #GtkStyleContext returned by
* gtk_widget_get_style_context() will already have a #GtkWidgetPath, a
* #GdkScreen and RTL/LTR information set. The style context will also be
* updated automatically if any of these settings change on the widget.
*
* If you are using the theming layer standalone, you will need to set a
* widget path and a screen yourself to the created style context through
* gtk_style_context_set_path() and possibly gtk_style_context_set_screen(). See
* the “Foreign drawing“ example in gtk3-demo.
*
* # Style Classes # {#gtkstylecontext-classes}
*
* Widgets can add style classes to their context, which can be used to associate
* different styles by class. The documentation for individual widgets lists
* which style classes it uses itself, and which style classes may be added by
* applications to affect their appearance.
*
* GTK+ defines macros for a number of style classes.
*
* # Style Regions
*
* Widgets can also add regions with flags to their context. This feature is
* deprecated and will be removed in a future GTK+ update. Please use style
* classes instead.
*
* GTK+ defines macros for a number of style regions.
*
* # Custom styling in UI libraries and applications
*
* If you are developing a library with custom #GtkWidgets that
* render differently than standard components, you may need to add a
* #GtkStyleProvider yourself with the %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK
* priority, either a #GtkCssProvider or a custom object implementing the
* #GtkStyleProvider interface. This way themes may still attempt
* to style your UI elements in a different way if needed so.
*
* If you are using custom styling on an applications, you probably want then
* to make your style information prevail to the theme’s, so you must use
* a #GtkStyleProvider with the %GTK_STYLE_PROVIDER_PRIORITY_APPLICATION
* priority, keep in mind that the user settings in
* `XDG_CONFIG_HOME/gtk-3.0/gtk.css` will
* still take precedence over your changes, as it uses the
* %GTK_STYLE_PROVIDER_PRIORITY_USER priority.
*/
typedef struct PropertyValue PropertyValue;
struct PropertyValue
{
GType widget_type;
GParamSpec *pspec;
GValue value;
};
struct _GtkStyleContextPrivate
{
GdkScreen *screen;
guint cascade_changed_id;
GtkStyleCascade *cascade;
GtkStyleContext *parent;
GtkCssNode *cssnode;
GSList *saved_nodes;
GArray *property_cache;
GdkFrameClock *frame_clock;
GtkCssStyleChange *invalidating_context;
};
enum {
PROP_0,
PROP_SCREEN,
PROP_DIRECTION,
PROP_FRAME_CLOCK,
PROP_PARENT,
LAST_PROP
};
enum {
CHANGED,
LAST_SIGNAL
};
static GParamSpec *properties[LAST_PROP] = { NULL, };
static guint signals[LAST_SIGNAL] = { 0 };
static void gtk_style_context_finalize (GObject *object);
static void gtk_style_context_impl_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_style_context_impl_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static GtkCssNode * gtk_style_context_get_root (GtkStyleContext *context);
G_DEFINE_TYPE_WITH_PRIVATE (GtkStyleContext, gtk_style_context, G_TYPE_OBJECT)
static void
gtk_style_context_real_changed (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = context->priv;
if (GTK_IS_CSS_WIDGET_NODE (priv->cssnode))
{
GtkWidget *widget = gtk_css_widget_node_get_widget (GTK_CSS_WIDGET_NODE (priv->cssnode));
if (widget != NULL)
_gtk_widget_style_context_invalidated (widget);
}
}
static void
gtk_style_context_class_init (GtkStyleContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gtk_style_context_finalize;
object_class->set_property = gtk_style_context_impl_set_property;
object_class->get_property = gtk_style_context_impl_get_property;
klass->changed = gtk_style_context_real_changed;
/**
* GtkStyleContext::changed:
*
* The ::changed signal is emitted when there is a change in the
* #GtkStyleContext.
*
* For a #GtkStyleContext returned by gtk_widget_get_style_context(), the
* #GtkWidget::style-updated signal/vfunc might be more convenient to use.
*
* This signal is useful when using the theming layer standalone.
*
* Since: 3.0
*/
signals[CHANGED] =
g_signal_new (I_("changed"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkStyleContextClass, changed),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
properties[PROP_SCREEN] =
g_param_spec_object ("screen",
P_("Screen"),
P_("The associated GdkScreen"),
GDK_TYPE_SCREEN,
GTK_PARAM_READWRITE);
properties[PROP_FRAME_CLOCK] =
g_param_spec_object ("paint-clock",
P_("FrameClock"),
P_("The associated GdkFrameClock"),
GDK_TYPE_FRAME_CLOCK,
GTK_PARAM_READWRITE);
properties[PROP_DIRECTION] =
g_param_spec_enum ("direction",
P_("Direction"),
P_("Text direction"),
GTK_TYPE_TEXT_DIRECTION,
GTK_TEXT_DIR_LTR,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY|G_PARAM_DEPRECATED);
/**
* GtkStyleContext:parent:
*
* Sets or gets the style context’s parent. See gtk_style_context_set_parent()
* for details.
*
* Since: 3.4
*/
properties[PROP_PARENT] =
g_param_spec_object ("parent",
P_("Parent"),
P_("The parent style context"),
GTK_TYPE_STYLE_CONTEXT,
GTK_PARAM_READWRITE);
g_object_class_install_properties (object_class, LAST_PROP, properties);
}
void
gtk_style_context_clear_property_cache (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = context->priv;
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_set_size (priv->property_cache, 0);
}
static void
gtk_style_context_pop_style_node (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = context->priv;
g_return_if_fail (priv->saved_nodes != NULL);
if (GTK_IS_CSS_TRANSIENT_NODE (priv->cssnode))
gtk_css_node_set_parent (priv->cssnode, NULL);
g_object_unref (priv->cssnode);
priv->cssnode = priv->saved_nodes->data;
priv->saved_nodes = g_slist_remove (priv->saved_nodes, priv->cssnode);
}
static void
gtk_style_context_cascade_changed (GtkStyleCascade *cascade,
GtkStyleContext *context)
{
gtk_css_node_invalidate_style_provider (gtk_style_context_get_root (context));
}
static void
gtk_style_context_set_cascade (GtkStyleContext *context,
GtkStyleCascade *cascade)
{
GtkStyleContextPrivate *priv;
priv = context->priv;
if (priv->cascade == cascade)
return;
if (priv->cascade)
{
g_signal_handler_disconnect (priv->cascade, priv->cascade_changed_id);
priv->cascade_changed_id = 0;
g_object_unref (priv->cascade);
}
if (cascade)
{
g_object_ref (cascade);
priv->cascade_changed_id = g_signal_connect (cascade,
"-gtk-private-changed",
G_CALLBACK (gtk_style_context_cascade_changed),
context);
}
priv->cascade = cascade;
if (cascade && priv->cssnode != NULL)
gtk_style_context_cascade_changed (cascade, context);
}
static void
gtk_style_context_init (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
priv = context->priv = gtk_style_context_get_instance_private (context);
priv->screen = gdk_screen_get_default ();
if (priv->screen == NULL)
g_error ("Can't create a GtkStyleContext without a display connection");
priv->property_cache = g_array_new (FALSE, FALSE, sizeof (PropertyValue));
gtk_style_context_set_cascade (context,
_gtk_settings_get_style_cascade (gtk_settings_get_for_screen (priv->screen), 1));
/* Create default info store */
priv->cssnode = gtk_css_path_node_new (context);
gtk_css_node_set_state (priv->cssnode, GTK_STATE_FLAG_DIR_LTR);
}
static void
gtk_style_context_clear_parent (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = context->priv;
if (priv->parent)
g_object_unref (priv->parent);
}
static void
gtk_style_context_finalize (GObject *object)
{
GtkStyleContext *context = GTK_STYLE_CONTEXT (object);
GtkStyleContextPrivate *priv = context->priv;
while (priv->saved_nodes)
gtk_style_context_pop_style_node (context);
if (GTK_IS_CSS_PATH_NODE (priv->cssnode))
gtk_css_path_node_unset_context (GTK_CSS_PATH_NODE (priv->cssnode));
gtk_style_context_clear_parent (context);
gtk_style_context_set_cascade (context, NULL);
g_object_unref (priv->cssnode);
gtk_style_context_clear_property_cache (context);
g_array_free (priv->property_cache, TRUE);
G_OBJECT_CLASS (gtk_style_context_parent_class)->finalize (object);
}
static void
gtk_style_context_impl_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkStyleContext *context = GTK_STYLE_CONTEXT (object);
switch (prop_id)
{
case PROP_SCREEN:
gtk_style_context_set_screen (context, g_value_get_object (value));
break;
case PROP_DIRECTION:
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gtk_style_context_set_direction (context, g_value_get_enum (value));
G_GNUC_END_IGNORE_DEPRECATIONS;
break;
case PROP_FRAME_CLOCK:
gtk_style_context_set_frame_clock (context, g_value_get_object (value));
break;
case PROP_PARENT:
gtk_style_context_set_parent (context, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_style_context_impl_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkStyleContext *context = GTK_STYLE_CONTEXT (object);
GtkStyleContextPrivate *priv = context->priv;
switch (prop_id)
{
case PROP_SCREEN:
g_value_set_object (value, priv->screen);
break;
case PROP_DIRECTION:
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
g_value_set_enum (value, gtk_style_context_get_direction (context));
G_GNUC_END_IGNORE_DEPRECATIONS;
break;
case PROP_FRAME_CLOCK:
g_value_set_object (value, priv->frame_clock);
break;
case PROP_PARENT:
g_value_set_object (value, priv->parent);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* returns TRUE if someone called gtk_style_context_save() but hasn’t
* called gtk_style_context_restore() yet.
* In those situations we don’t invalidate the context when somebody
* changes state/regions/classes.
*/
static gboolean
gtk_style_context_is_saved (GtkStyleContext *context)
{
return context->priv->saved_nodes != NULL;
}
static GtkCssNode *
gtk_style_context_get_root (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = context->priv;
if (priv->saved_nodes != NULL)
return g_slist_last (priv->saved_nodes)->data;
else
return priv->cssnode;
}
GtkStyleProviderPrivate *
gtk_style_context_get_style_provider (GtkStyleContext *context)
{
return GTK_STYLE_PROVIDER_PRIVATE (context->priv->cascade);
}
static gboolean
gtk_style_context_has_custom_cascade (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = context->priv;
GtkSettings *settings = gtk_settings_get_for_screen (priv->screen);
return priv->cascade != _gtk_settings_get_style_cascade (settings, _gtk_style_cascade_get_scale (priv->cascade));
}
GtkCssStyle *
gtk_style_context_lookup_style (GtkStyleContext *context)
{
/* Code will recreate style if it was changed */
return gtk_css_node_get_style (context->priv->cssnode);
}
GtkCssNode*
gtk_style_context_get_node (GtkStyleContext *context)
{
return context->priv->cssnode;
}
static GtkStateFlags
gtk_style_context_push_state (GtkStyleContext *context,
GtkStateFlags state)
{
GtkStyleContextPrivate *priv = context->priv;
GtkStateFlags current_state;
GtkCssNode *root;
current_state = gtk_css_node_get_state (priv->cssnode);
if (current_state == state)
return state;
root = gtk_style_context_get_root (context);
if (GTK_IS_CSS_TRANSIENT_NODE (priv->cssnode))
{
/* don't emit a warning, changing state here is fine */
}
else if (GTK_IS_CSS_WIDGET_NODE (root))
{
GtkWidget *widget = gtk_css_widget_node_get_widget (GTK_CSS_WIDGET_NODE (root));
g_debug ("State %u for %s %p doesn't match state %u set via gtk_style_context_set_state ()",
state, (widget == NULL) ? "(null)" : gtk_widget_get_name (widget),
widget, gtk_css_node_get_state (priv->cssnode));
}
else
{
g_debug ("State %u for context %p doesn't match state %u set via gtk_style_context_set_state ()",
state, context, gtk_css_node_get_state (priv->cssnode));
}
gtk_css_node_set_state (priv->cssnode, state);
return current_state;
}
static void
gtk_style_context_pop_state (GtkStyleContext *context,
GtkStateFlags saved_state)
{
gtk_css_node_set_state (context->priv->cssnode, saved_state);
}
/**
* gtk_style_context_new:
*
* Creates a standalone #GtkStyleContext, this style context
* won’t be attached to any widget, so you may want
* to call gtk_style_context_set_path() yourself.
*
* This function is only useful when using the theming layer
* separated from GTK+, if you are using #GtkStyleContext to
* theme #GtkWidgets, use gtk_widget_get_style_context()
* in order to get a style context ready to theme the widget.
*
* Returns: A newly created #GtkStyleContext.
**/
GtkStyleContext *
gtk_style_context_new (void)
{
return g_object_new (GTK_TYPE_STYLE_CONTEXT, NULL);
}
GtkStyleContext *
gtk_style_context_new_for_node (GtkCssNode *node)
{
GtkStyleContext *context;
g_return_val_if_fail (GTK_IS_CSS_NODE (node), NULL);
context = gtk_style_context_new ();
g_set_object (&context->priv->cssnode, node);
return context;
}
/**
* gtk_style_context_add_provider:
* @context: a #GtkStyleContext
* @provider: a #GtkStyleProvider
* @priority: the priority of the style provider. The lower
* it is, the earlier it will be used in the style
* construction. Typically this will be in the range
* between %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and
* %GTK_STYLE_PROVIDER_PRIORITY_USER
*
* Adds a style provider to @context, to be used in style construction.
* Note that a style provider added by this function only affects
* the style of the widget to which @context belongs. If you want
* to affect the style of all widgets, use
* gtk_style_context_add_provider_for_screen().
*
* Note: If both priorities are the same, a #GtkStyleProvider
* added through this function takes precedence over another added
* through gtk_style_context_add_provider_for_screen().
*
* Since: 3.0
**/
void
gtk_style_context_add_provider (GtkStyleContext *context,
GtkStyleProvider *provider,
guint priority)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
priv = context->priv;
if (!gtk_style_context_has_custom_cascade (context))
{
GtkStyleCascade *new_cascade;
new_cascade = _gtk_style_cascade_new ();
_gtk_style_cascade_set_scale (new_cascade, _gtk_style_cascade_get_scale (priv->cascade));
_gtk_style_cascade_set_parent (new_cascade,
_gtk_settings_get_style_cascade (gtk_settings_get_for_screen (priv->screen), 1));
_gtk_style_cascade_add_provider (new_cascade, provider, priority);
gtk_style_context_set_cascade (context, new_cascade);
g_object_unref (new_cascade);
}
else
{
_gtk_style_cascade_add_provider (priv->cascade, provider, priority);
}
}
/**
* gtk_style_context_remove_provider:
* @context: a #GtkStyleContext
* @provider: a #GtkStyleProvider
*
* Removes @provider from the style providers list in @context.
*
* Since: 3.0
**/
void
gtk_style_context_remove_provider (GtkStyleContext *context,
GtkStyleProvider *provider)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
if (!gtk_style_context_has_custom_cascade (context))
return;
_gtk_style_cascade_remove_provider (context->priv->cascade, provider);
}
/**
* gtk_style_context_reset_widgets:
* @screen: a #GdkScreen
*
* This function recomputes the styles for all widgets under a particular
* #GdkScreen. This is useful when some global parameter has changed that
* affects the appearance of all widgets, because when a widget gets a new
* style, it will both redraw and recompute any cached information about
* its appearance. As an example, it is used when the color scheme changes
* in the related #GtkSettings object.
*
* Since: 3.0
**/
void
gtk_style_context_reset_widgets (GdkScreen *screen)
{
GList *list, *toplevels;
toplevels = gtk_window_list_toplevels ();
g_list_foreach (toplevels, (GFunc) g_object_ref, NULL);
for (list = toplevels; list; list = list->next)
{
if (gtk_widget_get_screen (list->data) == screen)
gtk_widget_reset_style (list->data);
g_object_unref (list->data);
}
g_list_free (toplevels);
}
/**
* gtk_style_context_add_provider_for_screen:
* @screen: a #GdkScreen
* @provider: a #GtkStyleProvider
* @priority: the priority of the style provider. The lower
* it is, the earlier it will be used in the style
* construction. Typically this will be in the range
* between %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and
* %GTK_STYLE_PROVIDER_PRIORITY_USER
*
* Adds a global style provider to @screen, which will be used
* in style construction for all #GtkStyleContexts under @screen.
*
* GTK+ uses this to make styling information from #GtkSettings
* available.
*
* Note: If both priorities are the same, A #GtkStyleProvider
* added through gtk_style_context_add_provider() takes precedence
* over another added through this function.
*
* Since: 3.0
**/
void
gtk_style_context_add_provider_for_screen (GdkScreen *screen,
GtkStyleProvider *provider,
guint priority)
{
GtkStyleCascade *cascade;
g_return_if_fail (GDK_IS_SCREEN (screen));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
g_return_if_fail (!GTK_IS_SETTINGS (provider) || _gtk_settings_get_screen (GTK_SETTINGS (provider)) == screen);
cascade = _gtk_settings_get_style_cascade (gtk_settings_get_for_screen (screen), 1);
_gtk_style_cascade_add_provider (cascade, provider, priority);
}
/**
* gtk_style_context_remove_provider_for_screen:
* @screen: a #GdkScreen
* @provider: a #GtkStyleProvider
*
* Removes @provider from the global style providers list in @screen.
*
* Since: 3.0
**/
void
gtk_style_context_remove_provider_for_screen (GdkScreen *screen,
GtkStyleProvider *provider)
{
GtkStyleCascade *cascade;
g_return_if_fail (GDK_IS_SCREEN (screen));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
g_return_if_fail (!GTK_IS_SETTINGS (provider));
cascade = _gtk_settings_get_style_cascade (gtk_settings_get_for_screen (screen), 1);
_gtk_style_cascade_remove_provider (cascade, provider);
}
/**
* gtk_style_context_get_section:
* @context: a #GtkStyleContext
* @property: style property name
*
* Queries the location in the CSS where @property was defined for the
* current @context. Note that the state to be queried is taken from
* gtk_style_context_get_state().
*
* If the location is not available, %NULL will be returned. The
* location might not be available for various reasons, such as the
* property being overridden, @property not naming a supported CSS
* property or tracking of definitions being disabled for performance
* reasons.
*
* Shorthand CSS properties cannot be queried for a location and will
* always return %NULL.
*
* Returns: (nullable) (transfer none): %NULL or the section where a value
* for @property was defined
**/
GtkCssSection *
gtk_style_context_get_section (GtkStyleContext *context,
const gchar *property)
{
GtkCssStyle *values;
GtkStyleProperty *prop;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
g_return_val_if_fail (property != NULL, NULL);
prop = _gtk_style_property_lookup (property);
if (!GTK_IS_CSS_STYLE_PROPERTY (prop))
return NULL;
values = gtk_style_context_lookup_style (context);
return gtk_css_style_get_section (values, _gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (prop)));
}
static GtkCssValue *
gtk_style_context_query_func (guint id,
gpointer values)
{
return gtk_css_style_get_value (values, id);
}
/**
* gtk_style_context_get_property:
* @context: a #GtkStyleContext
* @property: style property name
* @state: state to retrieve the property value for
* @value: (out) (transfer full): return location for the style property value
*
* Gets a style property from @context for the given state.
*
* Note that not all CSS properties that are supported by GTK+ can be
* retrieved in this way, since they may not be representable as #GValue.
* GTK+ defines macros for a number of properties that can be used
* with this function.
*
* Note that passing a state other than the current state of @context
* is not recommended unless the style context has been saved with
* gtk_style_context_save().
*
* When @value is no longer needed, g_value_unset() must be called
* to free any allocated memory.
*
* Since: 3.0
**/
void
gtk_style_context_get_property (GtkStyleContext *context,
const gchar *property,
GtkStateFlags state,
GValue *value)
{
GtkStateFlags saved_state;
GtkStyleProperty *prop;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (property != NULL);
g_return_if_fail (value != NULL);
prop = _gtk_style_property_lookup (property);
if (prop == NULL)
{
g_warning ("Style property \"%s\" is not registered", property);
return;
}
if (_gtk_style_property_get_value_type (prop) == G_TYPE_NONE)
{
g_warning ("Style property \"%s\" is not gettable", property);
return;
}
saved_state = gtk_style_context_push_state (context, state);
_gtk_style_property_query (prop,
value,
gtk_style_context_query_func,
gtk_css_node_get_style (context->priv->cssnode));
gtk_style_context_pop_state (context, saved_state);
}
/**
* gtk_style_context_get_valist:
* @context: a #GtkStyleContext
* @state: state to retrieve the property values for
* @args: va_list of property name/return location pairs, followed by %NULL
*
* Retrieves several style property values from @context for a given state.
*
* See gtk_style_context_get_property() for details.
*
* Since: 3.0
*/
void
gtk_style_context_get_valist (GtkStyleContext *context,
GtkStateFlags state,
va_list args)
{
const gchar *property_name;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
property_name = va_arg (args, const gchar *);
while (property_name)
{
gchar *error = NULL;
GValue value = G_VALUE_INIT;
gtk_style_context_get_property (context,
property_name,
state,
&value);
G_VALUE_LCOPY (&value, args, 0, &error);
g_value_unset (&value);
if (error)
{
g_warning ("Could not get style property \"%s\": %s", property_name, error);
g_free (error);
break;
}
property_name = va_arg (args, const gchar *);
}
}
/**
* gtk_style_context_get:
* @context: a #GtkStyleContext
* @state: state to retrieve the property values for
* @...: property name /return value pairs, followed by %NULL
*
* Retrieves several style property values from @context for a
* given state.
*
* See gtk_style_context_get_property() for details.
*
* Since: 3.0
*/
void
gtk_style_context_get (GtkStyleContext *context,
GtkStateFlags state,
...)
{
va_list args;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
va_start (args, state);
gtk_style_context_get_valist (context, state, args);
va_end (args);
}
/*
* gtk_style_context_set_id:
* @context: a #GtkStyleContext
* @id: (allow-none): the id to use or %NULL for none.
*
* Sets the CSS ID to be used when obtaining style information.
**/
void
gtk_style_context_set_id (GtkStyleContext *context,
const char *id)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_css_node_set_id (context->priv->cssnode, id);
}
/*
* gtk_style_context_get_id:
* @context: a #GtkStyleContext
*
* Returns the CSS ID used when obtaining style information.
*
* Returns: (nullable): the ID or %NULL if no ID is set.
**/
const char *
gtk_style_context_get_id (GtkStyleContext *context)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
return gtk_css_node_get_id (context->priv->cssnode);
}
/**
* gtk_style_context_set_state:
* @context: a #GtkStyleContext
* @flags: state to represent
*
* Sets the state to be used for style matching.
*
* Since: 3.0
**/
void
gtk_style_context_set_state (GtkStyleContext *context,
GtkStateFlags flags)
{
GtkStateFlags old_flags;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
old_flags = gtk_css_node_get_state (context->priv->cssnode);
gtk_css_node_set_state (context->priv->cssnode, flags);
if (((old_flags ^ flags) & (GTK_STATE_FLAG_DIR_LTR | GTK_STATE_FLAG_DIR_RTL)) &&
!gtk_style_context_is_saved (context))
g_object_notify_by_pspec (G_OBJECT (context), properties[PROP_DIRECTION]);
}
/**
* gtk_style_context_get_state:
* @context: a #GtkStyleContext
*
* Returns the state used for style matching.
*
* This method should only be used to retrieve the #GtkStateFlags
* to pass to #GtkStyleContext methods, like gtk_style_context_get_padding().
* If you need to retrieve the current state of a #GtkWidget, use
* gtk_widget_get_state_flags().
*
* Returns: the state flags
*
* Since: 3.0
**/
GtkStateFlags
gtk_style_context_get_state (GtkStyleContext *context)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
return gtk_css_node_get_state (context->priv->cssnode);
}
/**
* gtk_style_context_set_scale:
* @context: a #GtkStyleContext
* @scale: scale
*
* Sets the scale to use when getting image assets for the style.
*
* Since: 3.10
**/
void
gtk_style_context_set_scale (GtkStyleContext *context,
gint scale)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
if (scale == _gtk_style_cascade_get_scale (priv->cascade))
return;
if (gtk_style_context_has_custom_cascade (context))
{
_gtk_style_cascade_set_scale (priv->cascade, scale);
}
else
{
GtkStyleCascade *new_cascade;
new_cascade = _gtk_settings_get_style_cascade (gtk_settings_get_for_screen (priv->screen),
scale);
gtk_style_context_set_cascade (context, new_cascade);
}
}
/**
* gtk_style_context_get_scale:
* @context: a #GtkStyleContext
*
* Returns the scale used for assets.
*
* Returns: the scale
*
* Since: 3.10
**/
gint
gtk_style_context_get_scale (GtkStyleContext *context)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
return _gtk_style_cascade_get_scale (context->priv->cascade);
}
/**
* gtk_style_context_state_is_running:
* @context: a #GtkStyleContext
* @state: a widget state
* @progress: (out): return location for the transition progress
*
* Returns %TRUE if there is a transition animation running for the
* current region (see gtk_style_context_push_animatable_region()).
*
* If @progress is not %NULL, the animation progress will be returned
* there, 0.0 means the state is closest to being unset, while 1.0 means
* it’s closest to being set. This means transition animation will
* run from 0 to 1 when @state is being set and from 1 to 0 when
* it’s being unset.
*
* Returns: %TRUE if there is a running transition animation for @state.
*
* Since: 3.0
*
* Deprecated: 3.6: This function always returns %FALSE
**/
gboolean
gtk_style_context_state_is_running (GtkStyleContext *context,
GtkStateType state,
gdouble *progress)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
return FALSE;
}
/**
* gtk_style_context_set_path:
* @context: a #GtkStyleContext
* @path: a #GtkWidgetPath
*
* Sets the #GtkWidgetPath used for style matching. As a
* consequence, the style will be regenerated to match
* the new given path.
*
* If you are using a #GtkStyleContext returned from
* gtk_widget_get_style_context(), you do not need to call
* this yourself.
*
* Since: 3.0
**/
void
gtk_style_context_set_path (GtkStyleContext *context,
GtkWidgetPath *path)
{
GtkCssNode *root;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (path != NULL);
root = gtk_style_context_get_root (context);
g_return_if_fail (GTK_IS_CSS_PATH_NODE (root));
if (path && gtk_widget_path_length (path) > 0)
{
GtkWidgetPath *copy = gtk_widget_path_copy (path);
gtk_css_path_node_set_widget_path (GTK_CSS_PATH_NODE (root), copy);
gtk_css_node_set_widget_type (root,
gtk_widget_path_iter_get_object_type (copy, -1));
gtk_css_node_set_name (root, gtk_widget_path_iter_get_object_name (copy, -1));
gtk_widget_path_unref (copy);
}
else
{
gtk_css_path_node_set_widget_path (GTK_CSS_PATH_NODE (root), NULL);
gtk_css_node_set_widget_type (root, G_TYPE_NONE);
gtk_css_node_set_name (root, NULL);
}
}
/**
* gtk_style_context_get_path:
* @context: a #GtkStyleContext
*
* Returns the widget path used for style matching.
*
* Returns: (transfer none): A #GtkWidgetPath
*
* Since: 3.0
**/
const GtkWidgetPath *
gtk_style_context_get_path (GtkStyleContext *context)
{
return gtk_css_node_get_widget_path (gtk_style_context_get_root (context));
}
/**
* gtk_style_context_set_parent:
* @context: a #GtkStyleContext
* @parent: (allow-none): the new parent or %NULL
*
* Sets the parent style context for @context. The parent style
* context is used to implement
* [inheritance](http://www.w3.org/TR/css3-cascade/#inheritance)
* of properties.
*
* If you are using a #GtkStyleContext returned from
* gtk_widget_get_style_context(), the parent will be set for you.
*
* Since: 3.4
**/
void
gtk_style_context_set_parent (GtkStyleContext *context,
GtkStyleContext *parent)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (parent == NULL || GTK_IS_STYLE_CONTEXT (parent));
priv = context->priv;
if (priv->parent == parent)
return;
if (parent)
{
GtkCssNode *root = gtk_style_context_get_root (context);
g_object_ref (parent);
if (gtk_css_node_get_parent (root) == NULL)
gtk_css_node_set_parent (root, gtk_style_context_get_root (parent));
}
else
{
gtk_css_node_set_parent (gtk_style_context_get_root (context), NULL);
}
gtk_style_context_clear_parent (context);
priv->parent = parent;
g_object_notify_by_pspec (G_OBJECT (context), properties[PROP_PARENT]);
gtk_css_node_invalidate (gtk_style_context_get_root (context), GTK_CSS_CHANGE_ANY_PARENT | GTK_CSS_CHANGE_ANY_SIBLING);
}
/**
* gtk_style_context_get_parent:
* @context: a #GtkStyleContext
*
* Gets the parent context set via gtk_style_context_set_parent().
* See that function for details.
*
* Returns: (nullable) (transfer none): the parent context or %NULL
*
* Since: 3.4
**/
GtkStyleContext *
gtk_style_context_get_parent (GtkStyleContext *context)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
return context->priv->parent;
}
/*
* gtk_style_context_save_to_node:
* @context: a #GtkStyleContext
* @node: the node to save to
*
* Saves the @context state, so temporary modifications done through
* gtk_style_context_add_class(), gtk_style_context_remove_class(),
* gtk_style_context_set_state(), etc. and rendering using
* gtk_render_background() or similar functions are done using the
* given @node.
*
* To undo, call gtk_style_context_restore().
*
* The matching call to gtk_style_context_restore() must be done
* before GTK returns to the main loop.
**/
void
gtk_style_context_save_to_node (GtkStyleContext *context,
GtkCssNode *node)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GTK_IS_CSS_NODE (node));
priv = context->priv;
priv->saved_nodes = g_slist_prepend (priv->saved_nodes, priv->cssnode);
priv->cssnode = g_object_ref (node);
}
void
gtk_style_context_save_named (GtkStyleContext *context,
const char *name)
{
GtkStyleContextPrivate *priv;
GtkCssNode *cssnode;
priv = context->priv;
/* Make sure we have the style existing. It is the
* parent of the new saved node after all.
*/
if (!gtk_style_context_is_saved (context))
gtk_style_context_lookup_style (context);
cssnode = gtk_css_transient_node_new (priv->cssnode);
gtk_css_node_set_parent (cssnode, gtk_style_context_get_root (context));
if (name)
gtk_css_node_set_name (cssnode, g_intern_string (name));
gtk_style_context_save_to_node (context, cssnode);
g_object_unref (cssnode);
}
/**
* gtk_style_context_save:
* @context: a #GtkStyleContext
*
* Saves the @context state, so temporary modifications done through
* gtk_style_context_add_class(), gtk_style_context_remove_class(),
* gtk_style_context_set_state(), etc. can quickly be reverted
* in one go through gtk_style_context_restore().
*
* The matching call to gtk_style_context_restore() must be done
* before GTK returns to the main loop.
*
* Since: 3.0
**/
void
gtk_style_context_save (GtkStyleContext *context)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_save_named (context, NULL);
}
/**
* gtk_style_context_restore:
* @context: a #GtkStyleContext
*
* Restores @context state to a previous stage.
* See gtk_style_context_save().
*
* Since: 3.0
**/
void
gtk_style_context_restore (GtkStyleContext *context)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
if (context->priv->saved_nodes == NULL)
{
g_warning ("Unpaired gtk_style_context_restore() call");
return;
}
gtk_style_context_pop_style_node (context);
}
/**
* gtk_style_context_add_class:
* @context: a #GtkStyleContext
* @class_name: class name to use in styling
*
* Adds a style class to @context, so posterior calls to
* gtk_style_context_get() or any of the gtk_render_*()
* functions will make use of this new class for styling.
*
* In the CSS file format, a #GtkEntry defining a “search”
* class, would be matched by:
*
* |[ <!-- language="CSS" -->
* entry.search { ... }
* ]|
*
* While any widget defining a “search” class would be
* matched by:
* |[ <!-- language="CSS" -->
* .search { ... }
* ]|
*
* Since: 3.0
**/
void
gtk_style_context_add_class (GtkStyleContext *context,
const gchar *class_name)
{
GQuark class_quark;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (class_name != NULL);
class_quark = g_quark_from_string (class_name);
gtk_css_node_add_class (context->priv->cssnode, class_quark);
}
/**
* gtk_style_context_remove_class:
* @context: a #GtkStyleContext
* @class_name: class name to remove
*
* Removes @class_name from @context.
*
* Since: 3.0
**/
void
gtk_style_context_remove_class (GtkStyleContext *context,
const gchar *class_name)
{
GQuark class_quark;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (class_name != NULL);
class_quark = g_quark_try_string (class_name);
if (!class_quark)
return;
gtk_css_node_remove_class (context->priv->cssnode, class_quark);
}
/**
* gtk_style_context_has_class:
* @context: a #GtkStyleContext
* @class_name: a class name
*
* Returns %TRUE if @context currently has defined the
* given class name.
*
* Returns: %TRUE if @context has @class_name defined
*
* Since: 3.0
**/
gboolean
gtk_style_context_has_class (GtkStyleContext *context,
const gchar *class_name)
{
GQuark class_quark;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
g_return_val_if_fail (class_name != NULL, FALSE);
class_quark = g_quark_try_string (class_name);
if (!class_quark)
return FALSE;
return gtk_css_node_has_class (context->priv->cssnode, class_quark);
}
/**
* gtk_style_context_list_classes:
* @context: a #GtkStyleContext
*
* Returns the list of classes currently defined in @context.
*
* Returns: (transfer container) (element-type utf8): a #GList of
* strings with the currently defined classes. The contents
* of the list are owned by GTK+, but you must free the list
* itself with g_list_free() when you are done with it.
*
* Since: 3.0
**/
GList *
gtk_style_context_list_classes (GtkStyleContext *context)
{
GList *classes_list = NULL;
const GQuark *classes;
guint n_classes, i;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
classes = gtk_css_node_list_classes (context->priv->cssnode, &n_classes);
for (i = n_classes; i > 0; i--)
classes_list = g_list_prepend (classes_list, (gchar *)g_quark_to_string (classes[i - 1]));
return classes_list;
}
/**
* gtk_style_context_list_regions:
* @context: a #GtkStyleContext
*
* Returns the list of regions currently defined in @context.
*
* Returns: (transfer container) (element-type utf8): a #GList of
* strings with the currently defined regions. The contents
* of the list are owned by GTK+, but you must free the list
* itself with g_list_free() when you are done with it.
*
* Since: 3.0
*
* Deprecated: 3.14
**/
GList *
gtk_style_context_list_regions (GtkStyleContext *context)
{
GList *regions, *l;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
regions = gtk_css_node_list_regions (context->priv->cssnode);
for (l = regions; l; l = l->next)
l->data = (char *) g_quark_to_string (GPOINTER_TO_UINT (l->data));
return regions;
}
gboolean
_gtk_style_context_check_region_name (const gchar *str)
{
g_return_val_if_fail (str != NULL, FALSE);
if (!g_ascii_islower (str[0]))
return FALSE;
while (*str)
{
if (*str != '-' &&
!g_ascii_islower (*str))
return FALSE;
str++;
}
return TRUE;
}
/**
* gtk_style_context_add_region:
* @context: a #GtkStyleContext
* @region_name: region name to use in styling
* @flags: flags that apply to the region
*
* Adds a region to @context, so posterior calls to
* gtk_style_context_get() or any of the gtk_render_*()
* functions will make use of this new region for styling.
*
* In the CSS file format, a #GtkTreeView defining a “row”
* region, would be matched by:
*
* |[ <!-- language="CSS" -->
* treeview row { ... }
* ]|
*
* Pseudo-classes are used for matching @flags, so the two
* following rules:
* |[ <!-- language="CSS" -->
* treeview row:nth-child(even) { ... }
* treeview row:nth-child(odd) { ... }
* ]|
*
* would apply to even and odd rows, respectively.
*
* Region names must only contain lowercase letters
* and “-”, starting always with a lowercase letter.
*
* Since: 3.0
*
* Deprecated: 3.14
**/
void
gtk_style_context_add_region (GtkStyleContext *context,
const gchar *region_name,
GtkRegionFlags flags)
{
GQuark region_quark;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (region_name != NULL);
g_return_if_fail (_gtk_style_context_check_region_name (region_name));
region_quark = g_quark_from_string (region_name);
gtk_css_node_add_region (context->priv->cssnode, region_quark, flags);
}
/**
* gtk_style_context_remove_region:
* @context: a #GtkStyleContext
* @region_name: region name to unset
*
* Removes a region from @context.
*
* Since: 3.0
*
* Deprecated: 3.14
**/
void
gtk_style_context_remove_region (GtkStyleContext *context,
const gchar *region_name)
{
GQuark region_quark;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (region_name != NULL);
region_quark = g_quark_try_string (region_name);
if (!region_quark)
return;
gtk_css_node_remove_region (context->priv->cssnode, region_quark);
}
/**
* gtk_style_context_has_region:
* @context: a #GtkStyleContext
* @region_name: a region name
* @flags_return: (out) (allow-none): return location for region flags
*
* Returns %TRUE if @context has the region defined.
* If @flags_return is not %NULL, it is set to the flags
* affecting the region.
*
* Returns: %TRUE if region is defined
*
* Since: 3.0
*
* Deprecated: 3.14
**/
gboolean
gtk_style_context_has_region (GtkStyleContext *context,
const gchar *region_name,
GtkRegionFlags *flags_return)
{
GQuark region_quark;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
g_return_val_if_fail (region_name != NULL, FALSE);
if (flags_return)
*flags_return = 0;
region_quark = g_quark_try_string (region_name);
if (!region_quark)
return FALSE;
return gtk_css_node_has_region (context->priv->cssnode, region_quark, flags_return);
}
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->widget_type < val2->widget_type ? -1 : 1;
if (val1->pspec != val2->pspec)
return val1->pspec < val2->pspec ? -1 : 1;
return 0;
}
GtkCssValue *
_gtk_style_context_peek_property (GtkStyleContext *context,
guint property_id)
{
GtkCssStyle *values = gtk_style_context_lookup_style (context);
return gtk_css_style_get_value (values, property_id);
}
const GValue *
_gtk_style_context_peek_style_property (GtkStyleContext *context,
GType widget_type,
GParamSpec *pspec)
{
GtkStyleContextPrivate *priv;
GtkWidgetPath *path;
PropertyValue *pcache, key = { 0 };
guint i;
priv = context->priv;
/* ensure the style cache is valid by forcing a validation */
gtk_style_context_lookup_style (context);
key.widget_type = widget_type;
key.pspec = pspec;
/* need value cache array */
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));
path = gtk_css_node_create_widget_path (gtk_style_context_get_root (context));
if (path && gtk_widget_path_length (path) > 0)
{
if (gtk_style_provider_get_style_property (GTK_STYLE_PROVIDER (priv->cascade),
path,
gtk_widget_path_iter_get_state (path, -1),
pspec, &pcache->value))
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
/* Resolve symbolic colors to GdkColor/GdkRGBA */
if (G_VALUE_TYPE (&pcache->value) == GTK_TYPE_SYMBOLIC_COLOR)
{
GtkSymbolicColor *color;
GdkRGBA rgba;
color = g_value_dup_boxed (&pcache->value);
g_value_unset (&pcache->value);
if (G_PARAM_SPEC_VALUE_TYPE (pspec) == GDK_TYPE_RGBA)
g_value_init (&pcache->value, GDK_TYPE_RGBA);
else
g_value_init (&pcache->value, GDK_TYPE_COLOR);
if (_gtk_style_context_resolve_color (context, _gtk_symbolic_color_get_css_value (color), &rgba))
{
if (G_PARAM_SPEC_VALUE_TYPE (pspec) == GDK_TYPE_RGBA)
g_value_set_boxed (&pcache->value, &rgba);
else
{
GdkColor rgb;
rgb.red = rgba.red * 65535. + 0.5;
rgb.green = rgba.green * 65535. + 0.5;
rgb.blue = rgba.blue * 65535. + 0.5;
g_value_set_boxed (&pcache->value, &rgb);
}
}
else
g_param_value_set_default (pspec, &pcache->value);
gtk_symbolic_color_unref (color);
}
G_GNUC_END_IGNORE_DEPRECATIONS;
gtk_widget_path_unref (path);
return &pcache->value;
}
}
gtk_widget_path_unref (path);
/* not supplied by any provider, revert to default */
g_param_value_set_default (pspec, &pcache->value);
return &pcache->value;
}
/**
* gtk_style_context_get_style_property:
* @context: a #GtkStyleContext
* @property_name: the name of the widget style property
* @value: Return location for the property value
*
* Gets the value for a widget style property.
*
* When @value is no longer needed, g_value_unset() must be called
* to free any allocated memory.
**/
void
gtk_style_context_get_style_property (GtkStyleContext *context,
const gchar *property_name,
GValue *value)
{
GtkCssNode *root;
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);
root = gtk_style_context_get_root (context);
if (GTK_IS_CSS_WIDGET_NODE (root))
{
GtkWidget *widget;
widget = gtk_css_widget_node_get_widget (GTK_CSS_WIDGET_NODE (root));
if (widget == NULL)
return;
widget_type = G_OBJECT_TYPE (widget);
}
else if (GTK_IS_CSS_PATH_NODE (root))
{
GtkWidgetPath *path;
path = gtk_css_path_node_get_widget_path (GTK_CSS_PATH_NODE (root));
if (path == NULL)
return;
widget_type = gtk_widget_path_get_object_type (path);
if (!g_type_is_a (widget_type, GTK_TYPE_WIDGET))
{
g_warning ("%s: can't get style properties for non-widget class '%s'",
G_STRLOC,
g_type_name (widget_type));
return;
}
}
else
{
return;
}
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));
}
/**
* gtk_style_context_get_style_valist:
* @context: a #GtkStyleContext
* @args: va_list of property name/return location pairs, followed by %NULL
*
* Retrieves several widget style properties from @context according to the
* current style.
*
* Since: 3.0
**/
void
gtk_style_context_get_style_valist (GtkStyleContext *context,
va_list args)
{
GtkCssNode *root;
const gchar *prop_name;
GType widget_type;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
prop_name = va_arg (args, const gchar *);
root = gtk_style_context_get_root (context);
if (GTK_IS_CSS_WIDGET_NODE (root))
{
GtkWidget *widget;
widget = gtk_css_widget_node_get_widget (GTK_CSS_WIDGET_NODE (root));
if (widget == NULL)
return;
widget_type = G_OBJECT_TYPE (widget);
}
else if (GTK_IS_CSS_PATH_NODE (root))
{
GtkWidgetPath *path;
path = gtk_css_path_node_get_widget_path (GTK_CSS_PATH_NODE (root));
if (path == NULL)
return;
widget_type = gtk_widget_path_get_object_type (path);
if (!g_type_is_a (widget_type, GTK_TYPE_WIDGET))
{
g_warning ("%s: can't get style properties for non-widget class '%s'",
G_STRLOC,
g_type_name (widget_type));
return;
}
}
else
{
return;
}
while (prop_name)
{
GtkWidgetClass *widget_class;
GParamSpec *pspec;
const GValue *peek_value;
gchar *error;
widget_class = g_type_class_ref (widget_type);
pspec = gtk_widget_class_find_style_property (widget_class, prop_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),
prop_name);
break;
}
peek_value = _gtk_style_context_peek_style_property (context, widget_type, pspec);
G_VALUE_LCOPY (peek_value, args, 0, &error);
if (error)
{
g_warning ("can't retrieve style property '%s' of type '%s': %s",
pspec->name,
G_VALUE_TYPE_NAME (peek_value),
error);
g_free (error);
break;
}
prop_name = va_arg (args, const gchar *);
}
}
/**
* gtk_style_context_get_style:
* @context: a #GtkStyleContext
* @...: property name /return value pairs, followed by %NULL
*
* Retrieves several widget style properties from @context according to the
* current style.
*
* Since: 3.0
**/
void
gtk_style_context_get_style (GtkStyleContext *context,
...)
{
va_list args;
va_start (args, context);
gtk_style_context_get_style_valist (context, args);
va_end (args);
}
/**
* gtk_style_context_lookup_icon_set:
* @context: a #GtkStyleContext
* @stock_id: an icon name
*
* Looks up @stock_id in the icon factories associated to @context and
* the default icon factory, returning an icon set if found, otherwise
* %NULL.
*
* Returns: (nullable) (transfer none): The looked up %GtkIconSet, or %NULL
*
* Deprecated: 3.10: Use gtk_icon_theme_lookup_icon() instead.
**/
GtkIconSet *
gtk_style_context_lookup_icon_set (GtkStyleContext *context,
const gchar *stock_id)
{
GtkIconSet *icon_set;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
g_return_val_if_fail (stock_id != NULL, NULL);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
icon_set = gtk_icon_factory_lookup_default (stock_id);
G_GNUC_END_IGNORE_DEPRECATIONS;
return icon_set;
}
/**
* gtk_style_context_set_screen:
* @context: a #GtkStyleContext
* @screen: a #GdkScreen
*
* Attaches @context to the given screen.
*
* The screen is used to add style information from “global” style
* providers, such as the screen’s #GtkSettings instance.
*
* If you are using a #GtkStyleContext returned from
* gtk_widget_get_style_context(), you do not need to
* call this yourself.
*
* Since: 3.0
**/
void
gtk_style_context_set_screen (GtkStyleContext *context,
GdkScreen *screen)
{
GtkStyleContextPrivate *priv;
GtkStyleCascade *screen_cascade;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GDK_IS_SCREEN (screen));
priv = context->priv;
if (priv->screen == screen)
return;
if (gtk_style_context_has_custom_cascade (context))
{
screen_cascade = _gtk_settings_get_style_cascade (gtk_settings_get_for_screen (screen), 1);
_gtk_style_cascade_set_parent (priv->cascade, screen_cascade);
}
else
{
screen_cascade = _gtk_settings_get_style_cascade (gtk_settings_get_for_screen (screen),
_gtk_style_cascade_get_scale (priv->cascade));
gtk_style_context_set_cascade (context, screen_cascade);
}
priv->screen = screen;
g_object_notify_by_pspec (G_OBJECT (context), properties[PROP_SCREEN]);
}
/**
* gtk_style_context_get_screen:
* @context: a #GtkStyleContext
*
* Returns the #GdkScreen to which @context is attached.
*
* Returns: (transfer none): a #GdkScreen.
**/
GdkScreen *
gtk_style_context_get_screen (GtkStyleContext *context)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
return context->priv->screen;
}
/**
* gtk_style_context_set_frame_clock:
* @context: a #GdkFrameClock
* @frame_clock: a #GdkFrameClock
*
* Attaches @context to the given frame clock.
*
* The frame clock is used for the timing of animations.
*
* If you are using a #GtkStyleContext returned from
* gtk_widget_get_style_context(), you do not need to
* call this yourself.
*
* Since: 3.8
**/
void
gtk_style_context_set_frame_clock (GtkStyleContext *context,
GdkFrameClock *frame_clock)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (frame_clock == NULL || GDK_IS_FRAME_CLOCK (frame_clock));
if (g_set_object (&context->priv->frame_clock, frame_clock))
g_object_notify_by_pspec (G_OBJECT (context), properties[PROP_FRAME_CLOCK]);
}
/**
* gtk_style_context_get_frame_clock:
* @context: a #GtkStyleContext
*
* Returns the #GdkFrameClock to which @context is attached.
*
* Returns: (nullable) (transfer none): a #GdkFrameClock, or %NULL
* if @context does not have an attached frame clock.
*
* Since: 3.8
**/
GdkFrameClock *
gtk_style_context_get_frame_clock (GtkStyleContext *context)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
return context->priv->frame_clock;
}
/**
* gtk_style_context_set_direction:
* @context: a #GtkStyleContext
* @direction: the new direction.
*
* Sets the reading direction for rendering purposes.
*
* If you are using a #GtkStyleContext returned from
* gtk_widget_get_style_context(), you do not need to
* call this yourself.
*
* Since: 3.0
*
* Deprecated: 3.8: Use gtk_style_context_set_state() with
* #GTK_STATE_FLAG_DIR_LTR and #GTK_STATE_FLAG_DIR_RTL
* instead.
**/
void
gtk_style_context_set_direction (GtkStyleContext *context,
GtkTextDirection direction)
{
GtkStateFlags state;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
state = gtk_style_context_get_state (context);
state &= ~(GTK_STATE_FLAG_DIR_LTR | GTK_STATE_FLAG_DIR_RTL);
switch (direction)
{
case GTK_TEXT_DIR_LTR:
state |= GTK_STATE_FLAG_DIR_LTR;
break;
case GTK_TEXT_DIR_RTL:
state |= GTK_STATE_FLAG_DIR_RTL;
break;
case GTK_TEXT_DIR_NONE:
default:
break;
}
gtk_style_context_set_state (context, state);
}
/**
* gtk_style_context_get_direction:
* @context: a #GtkStyleContext
*
* Returns the widget direction used for rendering.
*
* Returns: the widget direction
*
* Since: 3.0
*
* Deprecated: 3.8: Use gtk_style_context_get_state() and
* check for #GTK_STATE_FLAG_DIR_LTR and
* #GTK_STATE_FLAG_DIR_RTL instead.
**/
GtkTextDirection
gtk_style_context_get_direction (GtkStyleContext *context)
{
GtkStateFlags state;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), GTK_TEXT_DIR_LTR);
state = gtk_style_context_get_state (context);
if (state & GTK_STATE_FLAG_DIR_LTR)
return GTK_TEXT_DIR_LTR;
else if (state & GTK_STATE_FLAG_DIR_RTL)
return GTK_TEXT_DIR_RTL;
else
return GTK_TEXT_DIR_NONE;
}
/**
* gtk_style_context_set_junction_sides:
* @context: a #GtkStyleContext
* @sides: sides where rendered elements are visually connected to
* other elements
*
* Sets the sides where rendered elements (mostly through
* gtk_render_frame()) will visually connect with other visual elements.
*
* This is merely a hint that may or may not be honored
* by themes.
*
* Container widgets are expected to set junction hints as appropriate
* for their children, so it should not normally be necessary to call
* this function manually.
*
* Since: 3.0
**/
void
gtk_style_context_set_junction_sides (GtkStyleContext *context,
GtkJunctionSides sides)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_css_node_set_junction_sides (context->priv->cssnode, sides);
}
/**
* gtk_style_context_get_junction_sides:
* @context: a #GtkStyleContext
*
* Returns the sides where rendered elements connect visually with others.
*
* Returns: the junction sides
*
* Since: 3.0
**/
GtkJunctionSides
gtk_style_context_get_junction_sides (GtkStyleContext *context)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
return gtk_css_node_get_junction_sides (context->priv->cssnode);
}
gboolean
_gtk_style_context_resolve_color (GtkStyleContext *context,
GtkCssValue *color,
GdkRGBA *result)
{
GtkCssValue *val;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
g_return_val_if_fail (color != NULL, FALSE);
g_return_val_if_fail (result != NULL, FALSE);
val = _gtk_css_color_value_resolve (color,
GTK_STYLE_PROVIDER_PRIVATE (context->priv->cascade),
_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR),
NULL);
if (val == NULL)
return FALSE;
*result = *_gtk_css_rgba_value_get_rgba (val);
_gtk_css_value_unref (val);
return TRUE;
}
/**
* gtk_style_context_lookup_color:
* @context: a #GtkStyleContext
* @color_name: color name to lookup
* @color: (out): Return location for the looked up color
*
* Looks up and resolves a color name in the @context color map.
*
* Returns: %TRUE if @color_name was found and resolved, %FALSE otherwise
**/
gboolean
gtk_style_context_lookup_color (GtkStyleContext *context,
const gchar *color_name,
GdkRGBA *color)
{
GtkCssValue *value;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
g_return_val_if_fail (color_name != NULL, FALSE);
g_return_val_if_fail (color != NULL, FALSE);
value = _gtk_style_provider_private_get_color (GTK_STYLE_PROVIDER_PRIVATE (context->priv->cascade), color_name);
if (value == NULL)
return FALSE;
return _gtk_style_context_resolve_color (context, value, color);
}
/**
* gtk_style_context_notify_state_change:
* @context: a #GtkStyleContext
* @window: a #GdkWindow
* @region_id: (allow-none): animatable region to notify on, or %NULL.
* See gtk_style_context_push_animatable_region()
* @state: state to trigger transition for
* @state_value: %TRUE if @state is the state we are changing to,
* %FALSE if we are changing away from it
*
* Notifies a state change on @context, so if the current style makes use
* of transition animations, one will be started so all rendered elements
* under @region_id are animated for state @state being set to value
* @state_value.
*
* The @window parameter is used in order to invalidate the rendered area
* as the animation runs, so make sure it is the same window that is being
* rendered on by the gtk_render_*() functions.
*
* If @region_id is %NULL, all rendered elements using @context will be
* affected by this state transition.
*
* As a practical example, a #GtkButton notifying a state transition on
* the prelight state:
* |[ <!-- language="C" -->
* gtk_style_context_notify_state_change (context,
* gtk_widget_get_window (widget),
* NULL,
* GTK_STATE_PRELIGHT,
* button->in_button);
* ]|
*
* Can be handled in the CSS file like this:
* |[ <!-- language="CSS" -->
* button {
* background-color: #f00
* }
*
* button:hover {
* background-color: #fff;
* transition: 200ms linear
* }
* ]|
*
* This combination will animate the button background from red to white
* if a pointer enters the button, and back to red if the pointer leaves
* the button.
*
* Note that @state is used when finding the transition parameters, which
* is why the style places the transition under the :hover pseudo-class.
*
* Since: 3.0
*
* Deprecated: 3.6: This function does nothing.
**/
void
gtk_style_context_notify_state_change (GtkStyleContext *context,
GdkWindow *window,
gpointer region_id,
GtkStateType state,
gboolean state_value)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GDK_IS_WINDOW (window));
g_return_if_fail (state > GTK_STATE_NORMAL && state <= GTK_STATE_FOCUSED);
}
/**
* gtk_style_context_cancel_animations:
* @context: a #GtkStyleContext
* @region_id: (allow-none): animatable region to stop, or %NULL.
* See gtk_style_context_push_animatable_region()
*
* Stops all running animations for @region_id and all animatable
* regions underneath.
*
* A %NULL @region_id will stop all ongoing animations in @context,
* when dealing with a #GtkStyleContext obtained through
* gtk_widget_get_style_context(), this is normally done for you
* in all circumstances you would expect all widget to be stopped,
* so this should be only used in complex widgets with different
* animatable regions.
*
* Since: 3.0
*
* Deprecated: 3.6: This function does nothing.
**/
void
gtk_style_context_cancel_animations (GtkStyleContext *context,
gpointer region_id)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
}
/**
* gtk_style_context_scroll_animations:
* @context: a #GtkStyleContext
* @window: a #GdkWindow used previously in
* gtk_style_context_notify_state_change()
* @dx: Amount to scroll in the X axis
* @dy: Amount to scroll in the Y axis
*
* This function is analogous to gdk_window_scroll(), and
* should be called together with it so the invalidation
* areas for any ongoing animation are scrolled together
* with it.
*
* Since: 3.0
*
* Deprecated: 3.6: This function does nothing.
**/
void
gtk_style_context_scroll_animations (GtkStyleContext *context,
GdkWindow *window,
gint dx,
gint dy)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GDK_IS_WINDOW (window));
}
/**
* gtk_style_context_push_animatable_region:
* @context: a #GtkStyleContext
* @region_id: unique identifier for the animatable region
*
* Pushes an animatable region, so all further gtk_render_*() calls between
* this call and the following gtk_style_context_pop_animatable_region()
* will potentially show transition animations for this region if
* gtk_style_context_notify_state_change() is called for a given state,
* and the current theme/style defines transition animations for state
* changes.
*
* The @region_id used must be unique in @context so the themes
* can uniquely identify rendered elements subject to a state transition.
*
* Since: 3.0
*
* Deprecated: 3.6: This function does nothing.
**/
void
gtk_style_context_push_animatable_region (GtkStyleContext *context,
gpointer region_id)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (region_id != NULL);
}
/**
* gtk_style_context_pop_animatable_region:
* @context: a #GtkStyleContext
*
* Pops an animatable region from @context.
* See gtk_style_context_push_animatable_region().
*
* Since: 3.0
*
* Deprecated: 3.6: This function does nothing.
**/
void
gtk_style_context_pop_animatable_region (GtkStyleContext *context)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
}
static GtkCssStyleChange magic_number;
void
gtk_style_context_validate (GtkStyleContext *context,
GtkCssStyleChange *change)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
/* Avoid reentrancy */
if (priv->invalidating_context)
return;
if (change)
priv->invalidating_context = change;
else
priv->invalidating_context = &magic_number;
g_signal_emit (context, signals[CHANGED], 0);
g_object_set_data (G_OBJECT (context), "font-cache-for-get_font", NULL);
priv->invalidating_context = NULL;
}
/**
* gtk_style_context_invalidate:
* @context: a #GtkStyleContext.
*
* Invalidates @context style information, so it will be reconstructed
* again. It is useful if you modify the @context and need the new
* information immediately.
*
* Since: 3.0
*
* Deprecated: 3.12: Style contexts are invalidated automatically.
**/
void
gtk_style_context_invalidate (GtkStyleContext *context)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_clear_property_cache (context);
gtk_style_context_validate (context, NULL);
}
/**
* gtk_style_context_set_background:
* @context: a #GtkStyleContext
* @window: a #GdkWindow
*
* Sets the background of @window to the background pattern or
* color specified in @context for its current state.
*
* Since: 3.0
*
* Deprecated: 3.18: Use gtk_render_background() instead.
* Note that clients still using this function are now responsible
* for calling this function again whenever @context is invalidated.
**/
void
gtk_style_context_set_background (GtkStyleContext *context,
GdkWindow *window)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GDK_IS_WINDOW (window));
/* This is a sophisticated optimization.
* If we know the GDK window's background will be opaque, we mark
* it as opaque. This is so GDK can do all the optimizations it does
* for opaque windows and be fast.
* This is mainly used when scrolling.
*
* We could indeed just set black instead of the color we have.
*/
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
if (gtk_css_style_render_background_is_opaque (gtk_style_context_lookup_style (context)))
{
const GdkRGBA *color;
color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BACKGROUND_COLOR));
gdk_window_set_background_rgba (window, color);
}
else
{
GdkRGBA transparent = { 0.0, 0.0, 0.0, 0.0 };
gdk_window_set_background_rgba (window, &transparent);
}
G_GNUC_END_IGNORE_DEPRECATIONS
}
/**
* gtk_style_context_get_color:
* @context: a #GtkStyleContext
* @state: state to retrieve the color for
* @color: (out): return value for the foreground color
*
* Gets the foreground color for a given state.
*
* See gtk_style_context_get_property() and
* #GTK_STYLE_PROPERTY_COLOR for details.
*
* Since: 3.0
**/
void
gtk_style_context_get_color (GtkStyleContext *context,
GtkStateFlags state,
GdkRGBA *color)
{
GdkRGBA *c;
g_return_if_fail (color != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_get (context,
state,
"color", &c,
NULL);
*color = *c;
gdk_rgba_free (c);
}
/**
* gtk_style_context_get_background_color:
* @context: a #GtkStyleContext
* @state: state to retrieve the color for
* @color: (out): return value for the background color
*
* Gets the background color for a given state.
*
* This function is far less useful than it seems, and it should not be used in
* newly written code. CSS has no concept of "background color", as a background
* can be an image, or a gradient, or any other pattern including solid colors.
*
* The only reason why you would call gtk_style_context_get_background_color() is
* to use the returned value to draw the background with it; the correct way to
* achieve this result is to use gtk_render_background() instead, along with CSS
* style classes to modify the color to be rendered.
*
* Since: 3.0
*
* Deprecated: 3.16: Use gtk_render_background() instead.
**/
void
gtk_style_context_get_background_color (GtkStyleContext *context,
GtkStateFlags state,
GdkRGBA *color)
{
GdkRGBA *c;
g_return_if_fail (color != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_get (context,
state,
"background-color", &c,
NULL);
*color = *c;
gdk_rgba_free (c);
}
/**
* gtk_style_context_get_border_color:
* @context: a #GtkStyleContext
* @state: state to retrieve the color for
* @color: (out): return value for the border color
*
* Gets the border color for a given state.
*
* Since: 3.0
*
* Deprecated: 3.16: Use gtk_render_frame() instead.
**/
void
gtk_style_context_get_border_color (GtkStyleContext *context,
GtkStateFlags state,
GdkRGBA *color)
{
GdkRGBA *c;
g_return_if_fail (color != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_get (context,
state,
"border-color", &c,
NULL);
*color = *c;
gdk_rgba_free (c);
}
/**
* gtk_style_context_get_border:
* @context: a #GtkStyleContext
* @state: state to retrieve the border for
* @border: (out): return value for the border settings
*
* Gets the border for a given state as a #GtkBorder.
*
* See gtk_style_context_get_property() and
* #GTK_STYLE_PROPERTY_BORDER_WIDTH for details.
*
* Since: 3.0
**/
void
gtk_style_context_get_border (GtkStyleContext *context,
GtkStateFlags state,
GtkBorder *border)
{
GtkCssStyle *style;
GtkStateFlags saved_state;
double top, left, bottom, right;
g_return_if_fail (border != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
saved_state = gtk_style_context_push_state (context, state);
style = gtk_style_context_lookup_style (context);
top = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_TOP_WIDTH), 100));
right = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_RIGHT_WIDTH), 100));
bottom = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_BOTTOM_WIDTH), 100));
left = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_LEFT_WIDTH), 100));
border->top = top;
border->left = left;
border->bottom = bottom;
border->right = right;
gtk_style_context_pop_state (context, saved_state);
}
/**
* gtk_style_context_get_padding:
* @context: a #GtkStyleContext
* @state: state to retrieve the padding for
* @padding: (out): return value for the padding settings
*
* Gets the padding for a given state as a #GtkBorder.
* See gtk_style_context_get() and #GTK_STYLE_PROPERTY_PADDING
* for details.
*
* Since: 3.0
**/
void
gtk_style_context_get_padding (GtkStyleContext *context,
GtkStateFlags state,
GtkBorder *padding)
{
GtkCssStyle *style;
GtkStateFlags saved_state;
double top, left, bottom, right;
g_return_if_fail (padding != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
saved_state = gtk_style_context_push_state (context, state);
style = gtk_style_context_lookup_style (context);
top = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_PADDING_TOP), 100));
right = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_PADDING_RIGHT), 100));
bottom = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_PADDING_BOTTOM), 100));
left = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_PADDING_LEFT), 100));
padding->top = top;
padding->left = left;
padding->bottom = bottom;
padding->right = right;
gtk_style_context_pop_state (context, saved_state);
}
/**
* gtk_style_context_get_margin:
* @context: a #GtkStyleContext
* @state: state to retrieve the border for
* @margin: (out): return value for the margin settings
*
* Gets the margin for a given state as a #GtkBorder.
* See gtk_style_property_get() and #GTK_STYLE_PROPERTY_MARGIN
* for details.
*
* Since: 3.0
**/
void
gtk_style_context_get_margin (GtkStyleContext *context,
GtkStateFlags state,
GtkBorder *margin)
{
GtkCssStyle *style;
GtkStateFlags saved_state;
double top, left, bottom, right;
g_return_if_fail (margin != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
saved_state = gtk_style_context_push_state (context, state);
style = gtk_style_context_lookup_style (context);
top = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_MARGIN_TOP), 100));
right = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_MARGIN_RIGHT), 100));
bottom = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_MARGIN_BOTTOM), 100));
left = round (_gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_MARGIN_LEFT), 100));
margin->top = top;
margin->left = left;
margin->bottom = bottom;
margin->right = right;
gtk_style_context_pop_state (context, saved_state);
}
/**
* gtk_style_context_get_font:
* @context: a #GtkStyleContext
* @state: state to retrieve the font for
*
* Returns the font description for a given state. The returned
* object is const and will remain valid until the
* #GtkStyleContext::changed signal happens.
*
* Returns: (transfer none): the #PangoFontDescription for the given
* state. This object is owned by GTK+ and should not be
* freed.
*
* Since: 3.0
*
* Deprecated: 3.8: Use gtk_style_context_get() for "font" or
* subproperties instead.
**/
const PangoFontDescription *
gtk_style_context_get_font (GtkStyleContext *context,
GtkStateFlags state)
{
GHashTable *hash;
PangoFontDescription *description, *previous;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
/* Yuck, fonts are created on-demand but we don't return a ref.
* Do bad things to achieve this requirement */
gtk_style_context_get (context, state, "font", &description, NULL);
hash = g_object_get_data (G_OBJECT (context), "font-cache-for-get_font");
if (hash == NULL)
{
hash = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL,
(GDestroyNotify) pango_font_description_free);
g_object_set_data_full (G_OBJECT (context),
"font-cache-for-get_font",
hash,
(GDestroyNotify) g_hash_table_unref);
}
previous = g_hash_table_lookup (hash, GUINT_TO_POINTER (state));
if (previous)
{
pango_font_description_merge (previous, description, TRUE);
pango_font_description_free (description);
description = previous;
}
else
{
g_hash_table_insert (hash, GUINT_TO_POINTER (state), description);
}
return description;
}
void
_gtk_style_context_get_cursor_color (GtkStyleContext *context,
GdkRGBA *primary_color,
GdkRGBA *secondary_color)
{
GdkRGBA *pc, *sc;
gtk_style_context_get (context,
gtk_style_context_get_state (context),
"caret-color", &pc,
"-gtk-secondary-caret-color", &sc,
NULL);
if (primary_color)
*primary_color = *pc;
if (secondary_color)
*secondary_color = *sc;
gdk_rgba_free (pc);
gdk_rgba_free (sc);
}
static void
draw_insertion_cursor (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble height,
gboolean is_primary,
PangoDirection direction,
gboolean draw_arrow)
{
GdkRGBA primary_color;
GdkRGBA secondary_color;
gfloat cursor_aspect_ratio;
gint stem_width;
gint offset;
cairo_save (cr);
cairo_new_path (cr);
_gtk_style_context_get_cursor_color (context, &primary_color, &secondary_color);
gdk_cairo_set_source_rgba (cr, is_primary ? &primary_color : &secondary_color);
/* When changing the shape or size of the cursor here,
* propagate the changes to gtktextview.c:text_window_invalidate_cursors().
*/
gtk_style_context_get_style (context,
"cursor-aspect-ratio", &cursor_aspect_ratio,
NULL);
stem_width = height * cursor_aspect_ratio + 1;
/* put (stem_width % 2) on the proper side of the cursor */
if (direction == PANGO_DIRECTION_LTR)
offset = stem_width / 2;
else
offset = stem_width - stem_width / 2;
cairo_rectangle (cr, x - offset, y, stem_width, height);
cairo_fill (cr);
if (draw_arrow)
{
gint arrow_width;
gint ax, ay;
arrow_width = stem_width + 1;
if (direction == PANGO_DIRECTION_RTL)
{
ax = x - offset - 1;
ay = y + height - arrow_width * 2 - arrow_width + 1;
cairo_move_to (cr, ax, ay + 1);
cairo_line_to (cr, ax - arrow_width, ay + arrow_width);
cairo_line_to (cr, ax, ay + 2 * arrow_width);
cairo_fill (cr);
}
else if (direction == PANGO_DIRECTION_LTR)
{
ax = x + stem_width - offset;
ay = y + height - arrow_width * 2 - arrow_width + 1;
cairo_move_to (cr, ax, ay + 1);
cairo_line_to (cr, ax + arrow_width, ay + arrow_width);
cairo_line_to (cr, ax, ay + 2 * arrow_width);
cairo_fill (cr);
}
else
g_assert_not_reached();
}
cairo_restore (cr);
}
/**
* gtk_render_insertion_cursor:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin
* @y: Y origin
* @layout: the #PangoLayout of the text
* @index: the index in the #PangoLayout
* @direction: the #PangoDirection of the text
*
* Draws a text caret on @cr at the specified index of @layout.
*
* Since: 3.4
**/
void
gtk_render_insertion_cursor (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout,
int index,
PangoDirection direction)
{
GtkStyleContextPrivate *priv;
gboolean split_cursor;
PangoRectangle strong_pos, weak_pos;
PangoRectangle *cursor1, *cursor2;
PangoDirection keymap_direction;
PangoDirection direction2;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
g_return_if_fail (PANGO_IS_LAYOUT (layout));
g_return_if_fail (index >= 0);
priv = context->priv;
g_object_get (gtk_settings_get_for_screen (priv->screen),
"gtk-split-cursor", &split_cursor,
NULL);
keymap_direction = gdk_keymap_get_direction (gdk_keymap_get_for_display (gdk_screen_get_display (priv->screen)));
pango_layout_get_cursor_pos (layout, index, &strong_pos, &weak_pos);
direction2 = PANGO_DIRECTION_NEUTRAL;
if (split_cursor)
{
cursor1 = &strong_pos;
if (strong_pos.x != weak_pos.x || strong_pos.y != weak_pos.y)
{
direction2 = (direction == PANGO_DIRECTION_LTR) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR;
cursor2 = &weak_pos;
}
}
else
{
if (keymap_direction == direction)
cursor1 = &strong_pos;
else
cursor1 = &weak_pos;
}
draw_insertion_cursor (context,
cr,
x + PANGO_PIXELS (cursor1->x),
y + PANGO_PIXELS (cursor1->y),
PANGO_PIXELS (cursor1->height),
TRUE,
direction,
direction2 != PANGO_DIRECTION_NEUTRAL);
if (direction2 != PANGO_DIRECTION_NEUTRAL)
{
draw_insertion_cursor (context,
cr,
x + PANGO_PIXELS (cursor2->x),
y + PANGO_PIXELS (cursor2->y),
PANGO_PIXELS (cursor2->height),
FALSE,
direction2,
TRUE);
}
}
/**
* gtk_draw_insertion_cursor:
* @widget: a #GtkWidget
* @cr: cairo context to draw to
* @location: location where to draw the cursor (@location->width is ignored)
* @is_primary: if the cursor should be the primary cursor color.
* @direction: whether the cursor is left-to-right or
* right-to-left. Should never be #GTK_TEXT_DIR_NONE
* @draw_arrow: %TRUE to draw a directional arrow on the
* cursor. Should be %FALSE unless the cursor is split.
*
* Draws a text caret on @cr at @location. This is not a style function
* but merely a convenience function for drawing the standard cursor shape.
*
* Since: 3.0
* Deprecated: 3.4: Use gtk_render_insertion_cursor() instead.
*/
void
gtk_draw_insertion_cursor (GtkWidget *widget,
cairo_t *cr,
const GdkRectangle *location,
gboolean is_primary,
GtkTextDirection direction,
gboolean draw_arrow)
{
GtkStyleContext *context;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (cr != NULL);
g_return_if_fail (location != NULL);
g_return_if_fail (direction != GTK_TEXT_DIR_NONE);
context = gtk_widget_get_style_context (widget);
draw_insertion_cursor (context, cr,
location->x, location->y, location->height,
is_primary,
(direction == GTK_TEXT_DIR_RTL) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR,
draw_arrow);
}
/**
* gtk_style_context_get_change:
* @context: the context to query
*
* Queries the context for the changes for the currently executing
* GtkStyleContext::invalidate signal. If no signal is currently
* emitted or the signal has not been triggered by a CssNode
* invalidation, this function returns %NULL.
*
* FIXME 4.0: Make this part of the signal.
*
* Returns: %NULL or the currently invalidating changes
**/
GtkCssStyleChange *
gtk_style_context_get_change (GtkStyleContext *context)
{
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
if (context->priv->invalidating_context == &magic_number)
return NULL;
return context->priv->invalidating_context;
}
void
_gtk_style_context_get_icon_extents (GtkStyleContext *context,
GdkRectangle *extents,
gint x,
gint y,
gint width,
gint height)
{
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (extents != NULL);
if (_gtk_css_image_value_get_image (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ICON_SOURCE)) == NULL)
{
extents->x = extents->y = extents->width = extents->height = 0;
return;
}
gtk_css_style_render_icon_get_extents (gtk_style_context_lookup_style (context),
extents,
x, y, width, height);
}
PangoAttrList *
_gtk_style_context_get_pango_attributes (GtkStyleContext *context)
{
return gtk_css_style_get_pango_attributes (gtk_style_context_lookup_style (context));
}
static AtkAttributeSet *
add_attribute (AtkAttributeSet *attributes,
AtkTextAttribute attr,
const gchar *value)
{
AtkAttribute *at;
at = g_new (AtkAttribute, 1);
at->name = g_strdup (atk_text_attribute_get_name (attr));
at->value = g_strdup (value);
return g_slist_prepend (attributes, at);
}
/*
* _gtk_style_context_get_attributes:
* @attributes: a #AtkAttributeSet to add attributes to
* @context: the #GtkStyleContext to get attributes from
* @flags: the state to use with @context
*
* Adds the foreground and background color from @context to
* @attributes, after translating them to ATK attributes.
*
* This is a convenience function that can be used in
* implementing the #AtkText interface in widgets.
*
* Returns: the modified #AtkAttributeSet
*/
AtkAttributeSet *
_gtk_style_context_get_attributes (AtkAttributeSet *attributes,
GtkStyleContext *context,
GtkStateFlags flags)
{
GdkRGBA color;
gchar *value;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
gtk_style_context_get_background_color (context, flags, &color);
G_GNUC_END_IGNORE_DEPRECATIONS
value = g_strdup_printf ("%u,%u,%u",
(guint) ceil (color.red * 65536 - color.red),
(guint) ceil (color.green * 65536 - color.green),
(guint) ceil (color.blue * 65536 - color.blue));
attributes = add_attribute (attributes, ATK_TEXT_ATTR_BG_COLOR, value);
g_free (value);
gtk_style_context_get_color (context, flags, &color);
value = g_strdup_printf ("%u,%u,%u",
(guint) ceil (color.red * 65536 - color.red),
(guint) ceil (color.green * 65536 - color.green),
(guint) ceil (color.blue * 65536 - color.blue));
attributes = add_attribute (attributes, ATK_TEXT_ATTR_FG_COLOR, value);
g_free (value);
return attributes;
}
cairo_pattern_t *
gtk_gradient_resolve_for_context (GtkGradient *gradient,
GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = context->priv;
g_return_val_if_fail (gradient != NULL, NULL);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
return _gtk_gradient_resolve_full (gradient,
GTK_STYLE_PROVIDER_PRIVATE (priv->cascade),
gtk_style_context_lookup_style (context),
priv->parent ? gtk_style_context_lookup_style (priv->parent) : NULL);
}
/**
* GtkStyleContextPrintFlags:
* @GTK_STYLE_CONTEXT_PRINT_RECURSE: Print the entire tree of
* CSS nodes starting at the style context's node
* @GTK_STYLE_CONTEXT_PRINT_SHOW_STYLE: Show the values of the
* CSS properties for each node
*
* Flags that modify the behavior of gtk_style_context_to_string().
* New values may be added to this enumeration.
*/
/**
* gtk_style_context_to_string:
* @context: a #GtkStyleContext
* @flags: Flags that determine what to print
*
* Converts the style context into a string representation.
*
* The string representation always includes information about
* the name, state, id, visibility and style classes of the CSS
* node that is backing @context. Depending on the flags, more
* information may be included.
*
* This function is intended for testing and debugging of the
* CSS implementation in GTK+. There are no guarantees about
* the format of the returned string, it may change.
*
* Returns: a newly allocated string representing @context
*
* Since: 3.20
*/
char *
gtk_style_context_to_string (GtkStyleContext *context,
GtkStyleContextPrintFlags flags)
{
GString *string;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
string = g_string_new ("");
gtk_css_node_print (context->priv->cssnode, flags, string, 0);
return g_string_free (string, FALSE);
}
Reference in New Issue View Git Blame Copy Permalink