AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity
606345cbaa
gtk2/gtk/gtkstylecontext.c

2191 lines
66 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 "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 "gtkcssstylepropertyprivate.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"
/**
* 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 display through
* gtk_style_context_add_provider_for_display(). 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
* #GdkDisplay 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 display yourself to the created style context through
* gtk_style_context_set_path() and gtk_style_context_set_display(), as well
* as updating the context yourself using gtk_style_context_invalidate()
* whenever any of the conditions change, such as a change in the
* #GtkSettings:gtk-theme-name setting or a hierarchy change in the rendered
* widget. 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.
*
* # 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-4.0/gtk.css` will
* still take precedence over your changes, as it uses the
* %GTK_STYLE_PROVIDER_PRIORITY_USER priority.
*/
#define CURSOR_ASPECT_RATIO (0.04)
typedef struct PropertyValue PropertyValue;
struct PropertyValue
{
GType widget_type;
GParamSpec *pspec;
GValue value;
};
struct _GtkStyleContextPrivate
{
GdkDisplay *display;
guint cascade_changed_id;
GtkStyleCascade *cascade;
GtkStyleContext *parent;
GtkCssNode *cssnode;
GSList *saved_nodes;
GdkFrameClock *frame_clock;
GtkCssStyleChange *invalidating_context;
};
typedef struct _GtkStyleContextPrivate GtkStyleContextPrivate;
enum {
PROP_0,
PROP_DISPLAY,
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 = gtk_style_context_get_instance_private (context);
if (GTK_IS_CSS_WIDGET_NODE (priv->cssnode))
_gtk_widget_style_context_invalidated (gtk_css_widget_node_get_widget (GTK_CSS_WIDGET_NODE (priv->cssnode)));
}
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,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
properties[PROP_DISPLAY] =
g_param_spec_object ("display",
P_("Display"),
P_("The associated GdkDisplay"),
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);
/**
* 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);
}
static void
gtk_style_context_pop_style_node (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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 = gtk_style_context_get_instance_private (context);
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 = gtk_style_context_get_instance_private (context);
priv->display = gdk_display_get_default ();
if (priv->display == NULL)
g_error ("Can't create a GtkStyleContext without a display connection");
gtk_style_context_set_cascade (context,
_gtk_settings_get_style_cascade (gtk_settings_get_for_display (priv->display), 1));
}
static void
gtk_style_context_clear_parent (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
if (priv->parent)
g_object_unref (priv->parent);
}
static void
gtk_style_context_finalize (GObject *object)
{
GtkStyleContext *context = GTK_STYLE_CONTEXT (object);
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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);
if (priv->cssnode)
g_object_unref (priv->cssnode);
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_DISPLAY:
gtk_style_context_set_display (context, g_value_get_object (value));
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 = gtk_style_context_get_instance_private (context);
switch (prop_id)
{
case PROP_DISPLAY:
g_value_set_object (value, priv->display);
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/classes.
*/
static gboolean
gtk_style_context_is_saved (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
return priv->saved_nodes != NULL;
}
static GtkCssNode *
gtk_style_context_get_root (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
if (priv->saved_nodes != NULL)
return g_slist_last (priv->saved_nodes)->data;
else
return priv->cssnode;
}
GtkStyleProvider *
gtk_style_context_get_style_provider (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
return GTK_STYLE_PROVIDER (priv->cascade);
}
static gboolean
gtk_style_context_has_custom_cascade (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
GtkSettings *settings = gtk_settings_get_for_display (priv->display);
return priv->cascade != _gtk_settings_get_style_cascade (settings, _gtk_style_cascade_get_scale (priv->cascade));
}
GtkCssStyle *
gtk_style_context_lookup_style (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
/* Code will recreate style if it was changed */
return gtk_css_node_get_style (priv->cssnode);
}
GtkCssNode*
gtk_style_context_get_node (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
return priv->cssnode;
}
/**
* 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)
{
GtkStyleContext *context = g_object_new (GTK_TYPE_STYLE_CONTEXT, NULL);
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
/* Create default info store */
priv->cssnode = gtk_css_path_node_new (context);
gtk_css_node_set_state (priv->cssnode, GTK_STATE_FLAG_DIR_LTR);
return context;
}
GtkStyleContext *
gtk_style_context_new_for_node (GtkCssNode *node)
{
GtkStyleContext *context;
GtkStyleContextPrivate *priv;
g_return_val_if_fail (GTK_IS_CSS_NODE (node), NULL);
context = g_object_new (GTK_TYPE_STYLE_CONTEXT, NULL);
priv = gtk_style_context_get_instance_private (context);
priv->cssnode = g_object_ref (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_display().
*
* 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_display().
*
* Since: 3.0
**/
void
gtk_style_context_add_provider (GtkStyleContext *context,
GtkStyleProvider *provider,
guint priority)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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))
{
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_display (priv->display), 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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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 (priv->cascade, provider);
}
/**
* gtk_style_context_reset_widgets:
* @display: a #GdkDisplay
*
* This function recomputes the styles for all widgets under a particular
* #GdkDisplay. 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 (GdkDisplay *display)
{
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_display (list->data) == display)
gtk_widget_reset_style (list->data);
g_object_unref (list->data);
}
g_list_free (toplevels);
}
/**
* gtk_style_context_add_provider_for_display:
* @display: a #GdkDisplay
* @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 @display, which will be used
* in style construction for all #GtkStyleContexts under @display.
*
* 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: 3.94
**/
void
gtk_style_context_add_provider_for_display (GdkDisplay *display,
GtkStyleProvider *provider,
guint priority)
{
GtkStyleCascade *cascade;
g_return_if_fail (GDK_IS_DISPLAY (display));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
g_return_if_fail (!GTK_IS_SETTINGS (provider) || _gtk_settings_get_display (GTK_SETTINGS (provider)) == display);
cascade = _gtk_settings_get_style_cascade (gtk_settings_get_for_display (display), 1);
_gtk_style_cascade_add_provider (cascade, provider, priority);
}
/**
* gtk_style_context_remove_provider_for_display:
* @display: a #GdkDisplay
* @provider: a #GtkStyleProvider
*
* Removes @provider from the global style providers list in @display.
*
* Since: 3.94
**/
void
gtk_style_context_remove_provider_for_display (GdkDisplay *display,
GtkStyleProvider *provider)
{
GtkStyleCascade *cascade;
g_return_if_fail (GDK_IS_DISPLAY (display));
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_display (display), 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
* @value: (out) (transfer full): return location for the style property value
*
* Gets a style property from @context for the current 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.
*
* 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,
GValue *value)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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;
}
_gtk_style_property_query (prop,
value,
gtk_style_context_query_func,
gtk_css_node_get_style (priv->cssnode));
}
/**
* gtk_style_context_get_valist:
* @context: a #GtkStyleContext
* @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.
*
* As with g_object_get(), a copy is made of the property contents for
* pointer-valued properties, and the caller is responsible for freeing the
* memory in the appropriate manner for the type. For example, by calling
* g_free() or g_object_unref(). Non-pointer-valued properties, such as
* integers, are returned by value and do not need to be freed.
*
* Since: 3.0
*/
void
gtk_style_context_get_valist (GtkStyleContext *context,
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,
&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
* @...: 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.
*
* As with g_object_get(), a copy is made of the property contents for
* pointer-valued properties, and the caller is responsible for freeing the
* memory in the appropriate manner for the type. For example, by calling
* g_free() or g_object_unref(). Non-pointer-valued properties, such as
* integers, are returned by value and do not need to be freed.
*
* Since: 3.0
*/
void
gtk_style_context_get (GtkStyleContext *context,
...)
{
va_list args;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
va_start (args, context);
gtk_style_context_get_valist (context, 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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_css_node_set_id (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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
return gtk_css_node_get_id (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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_css_node_set_state (priv->cssnode, flags);
}
/**
* 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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
return gtk_css_node_get_state (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 = gtk_style_context_get_instance_private (context);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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_display (priv->display),
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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
return _gtk_style_cascade_get_scale (priv->cascade);
}
/**
* 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 = gtk_style_context_get_instance_private (context);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (parent == NULL || GTK_IS_STYLE_CONTEXT (parent));
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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
return 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 = gtk_style_context_get_instance_private (context);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GTK_IS_CSS_NODE (node));
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 = gtk_style_context_get_instance_private (context);
GtkCssNode *cssnode;
/* 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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
if (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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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 (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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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 (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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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 (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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (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 (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;
}
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);
}
/**
* gtk_style_context_set_display:
* @context: a #GtkStyleContext
* @display: a #GdkDisplay
*
* Attaches @context to the given display.
*
* The display is used to add style information from “global” style
* providers, such as the display'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: 3.94
**/
void
gtk_style_context_set_display (GtkStyleContext *context,
GdkDisplay *display)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
GtkStyleCascade *display_cascade;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GDK_IS_DISPLAY (display));
if (priv->display == display)
return;
if (gtk_style_context_has_custom_cascade (context))
{
display_cascade = _gtk_settings_get_style_cascade (gtk_settings_get_for_display (display), 1);
_gtk_style_cascade_set_parent (priv->cascade, display_cascade);
}
else
{
display_cascade = _gtk_settings_get_style_cascade (gtk_settings_get_for_display (display),
_gtk_style_cascade_get_scale (priv->cascade));
gtk_style_context_set_cascade (context, display_cascade);
}
priv->display = display;
g_object_notify_by_pspec (G_OBJECT (context), properties[PROP_DISPLAY]);
}
/**
* gtk_style_context_get_display:
* @context: a #GtkStyleContext
*
* Returns the #GdkDisplay to which @context is attached.
*
* Returns: (transfer none): a #GdkDisplay.
*
* Since: 3.94
**/
GdkDisplay *
gtk_style_context_get_display (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
return priv->display;
}
/**
* 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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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 (&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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
return priv->frame_clock;
}
gboolean
_gtk_style_context_resolve_color (GtkStyleContext *context,
GtkCssValue *color,
GdkRGBA *result)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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 (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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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_get_color (GTK_STYLE_PROVIDER (priv->cascade), color_name);
if (value == NULL)
return FALSE;
return _gtk_style_context_resolve_color (context, value, color);
}
static GtkCssStyleChange magic_number;
void
gtk_style_context_validate (GtkStyleContext *context,
GtkCssStyleChange *change)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
/* 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);
priv->invalidating_context = NULL;
}
/**
* gtk_style_context_get_color:
* @context: a #GtkStyleContext
* @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,
GdkRGBA *color)
{
GdkRGBA *c;
g_return_if_fail (color != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_get (context,
"color", &c,
NULL);
*color = *c;
gdk_rgba_free (c);
}
/**
* gtk_style_context_get_background_color:
* @context: a #GtkStyleContext
* @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,
GdkRGBA *color)
{
GdkRGBA *c;
g_return_if_fail (color != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_get (context,
"background-color", &c,
NULL);
*color = *c;
gdk_rgba_free (c);
}
/**
* gtk_style_context_get_border_color:
* @context: a #GtkStyleContext
* @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,
GdkRGBA *color)
{
GdkRGBA *c;
g_return_if_fail (color != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_get (context,
"border-color", &c,
NULL);
*color = *c;
gdk_rgba_free (c);
}
/**
* gtk_style_context_get_border:
* @context: a #GtkStyleContext
* @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,
GtkBorder *border)
{
GtkCssStyle *style;
double top, left, bottom, right;
g_return_if_fail (border != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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_get_padding:
* @context: a #GtkStyleContext
* @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,
GtkBorder *padding)
{
GtkCssStyle *style;
double top, left, bottom, right;
g_return_if_fail (padding != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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_get_margin:
* @context: a #GtkStyleContext
* @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,
GtkBorder *margin)
{
GtkCssStyle *style;
double top, left, bottom, right;
g_return_if_fail (margin != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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;
}
void
_gtk_style_context_get_cursor_color (GtkStyleContext *context,
GdkRGBA *primary_color,
GdkRGBA *secondary_color)
{
GdkRGBA *pc, *sc;
gtk_style_context_get (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;
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().
*/
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);
}
static void
get_insertion_cursor_bounds (gdouble height,
PangoDirection direction,
gboolean draw_arrow,
graphene_rect_t *bounds)
{
gint stem_width;
gint offset;
stem_width = height * CURSOR_ASPECT_RATIO + 1;
if (direction == PANGO_DIRECTION_LTR)
offset = stem_width / 2;
else
offset = stem_width - stem_width / 2;
if (draw_arrow)
{
if (direction == PANGO_DIRECTION_LTR)
{
graphene_rect_init (bounds,
- offset, 0,
2 * stem_width + 1, height);
}
else
{
graphene_rect_init (bounds,
- offset - stem_width - 2, 0,
2 * stem_width + 2, height);
}
}
else
{
graphene_rect_init (bounds,
- offset, 0,
stem_width, height);
}
}
static void
snapshot_insertion_cursor (GtkSnapshot *snapshot,
GtkStyleContext *context,
gdouble height,
gboolean is_primary,
PangoDirection direction,
gboolean draw_arrow)
{
graphene_rect_t bounds;
cairo_t *cr;
get_insertion_cursor_bounds (height, direction, draw_arrow, &bounds);
cr = gtk_snapshot_append_cairo (snapshot,
&bounds,
"%s Cursor", is_primary ? "Primary" : "Secondary");
draw_insertion_cursor (context, cr, 0, 0, height, is_primary, direction, draw_arrow);
cairo_destroy (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 = gtk_style_context_get_instance_private (context);
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);
g_object_get (gtk_settings_get_for_display (priv->display),
"gtk-split-cursor", &split_cursor,
NULL);
keymap_direction = gdk_keymap_get_direction (gdk_keymap_get_for_display (priv->display));
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_snapshot_render_insertion_cursor:
* @snapshot: snapshot to render to
* @context: a #GtkStyleContext
* @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 using @snapshot at the specified index of @layout.
*
* Since: 3.90
**/
void
gtk_snapshot_render_insertion_cursor (GtkSnapshot *snapshot,
GtkStyleContext *context,
gdouble x,
gdouble y,
PangoLayout *layout,
int index,
PangoDirection direction)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
gboolean split_cursor;
PangoRectangle strong_pos, weak_pos;
PangoRectangle *cursor1, *cursor2;
PangoDirection keymap_direction;
PangoDirection direction2;
g_return_if_fail (snapshot != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (PANGO_IS_LAYOUT (layout));
g_return_if_fail (index >= 0);
g_object_get (gtk_settings_get_for_display (priv->display),
"gtk-split-cursor", &split_cursor,
NULL);
keymap_direction = gdk_keymap_get_direction (gdk_keymap_get_for_display (priv->display));
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;
}
gtk_snapshot_offset (snapshot, x + PANGO_PIXELS (cursor1->x), y + PANGO_PIXELS (cursor1->y));
snapshot_insertion_cursor (snapshot,
context,
PANGO_PIXELS (cursor1->height),
TRUE,
direction,
direction2 != PANGO_DIRECTION_NEUTRAL);
gtk_snapshot_offset (snapshot, - x - PANGO_PIXELS (cursor1->x), - y - PANGO_PIXELS (cursor1->y));
if (direction2 != PANGO_DIRECTION_NEUTRAL)
{
gtk_snapshot_offset (snapshot, x + PANGO_PIXELS (cursor2->x), y + PANGO_PIXELS (cursor2->y));
snapshot_insertion_cursor (snapshot,
context,
PANGO_PIXELS (cursor2->height),
FALSE,
direction2,
TRUE);
gtk_snapshot_offset (snapshot, - x - PANGO_PIXELS (cursor2->x), - y - PANGO_PIXELS (cursor2->y));
}
}
/**
* 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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
if (priv->invalidating_context == &magic_number)
return NULL;
return 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)
{
GdkRGBA color;
gchar *value;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
gtk_style_context_get_background_color (context, &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, &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;
}
/**
* 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)
{
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
GString *string;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
string = g_string_new ("");
gtk_css_node_print (priv->cssnode, flags, string, 0);
return g_string_free (string, FALSE);
}
Reference in New Issue View Git Blame Copy Permalink