forked from AuroraMiddleware/gtk
2000 lines
61 KiB
C
2000 lines
61 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkstylecontextprivate.h"
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#include <gdk/gdk.h>
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#include <math.h>
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#include <stdlib.h>
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#include <gobject/gvaluecollector.h>
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#include "gtkcsscolorvalueprivate.h"
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#include "gtkcssenumvalueprivate.h"
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#include "gtkcssimagevalueprivate.h"
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#include "gtkcssnodedeclarationprivate.h"
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#include "gtkcssnodeprivate.h"
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#include "gtkcssnumbervalueprivate.h"
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#include "gtkcsspathnodeprivate.h"
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#include "gtkcssrgbavalueprivate.h"
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#include "gtkcsscolorvalueprivate.h"
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#include "gtkcssstylepropertyprivate.h"
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#include "gtkcsstransientnodeprivate.h"
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#include "gtkcsswidgetnodeprivate.h"
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#include "gtkdebug.h"
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#include "gtkintl.h"
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#include "gtkprivate.h"
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#include "gtkrenderbackgroundprivate.h"
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#include "gtkrendericonprivate.h"
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#include "gtksettings.h"
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#include "gtksettingsprivate.h"
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#include "gtkstylecascadeprivate.h"
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#include "gtkstyleproviderprivate.h"
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#include "gtktypebuiltins.h"
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#include "gtkwidgetpath.h"
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#include "gtkwidgetprivate.h"
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/**
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* SECTION:gtkstylecontext
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* @Short_description: Rendering UI elements
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* @Title: GtkStyleContext
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*
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* #GtkStyleContext is an object that stores styling information affecting
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* a widget defined by #GtkWidgetPath.
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*
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* In order to construct the final style information, #GtkStyleContext
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* queries information from all attached #GtkStyleProviders. Style providers
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* can be either attached explicitly to the context through
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* gtk_style_context_add_provider(), or to the display through
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* gtk_style_context_add_provider_for_display(). The resulting style is a
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* combination of all providers’ information in priority order.
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*
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* For GTK+ widgets, any #GtkStyleContext returned by
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* gtk_widget_get_style_context() will already have a #GtkWidgetPath, a
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* #GdkDisplay and RTL/LTR information set. The style context will also be
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* updated automatically if any of these settings change on the widget.
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*
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* If you are using the theming layer standalone, you will need to set a
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* widget path and a display yourself to the created style context through
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* gtk_style_context_set_path() and possibly gtk_style_context_set_display().
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* See the “Foreign drawing“ example in gtk4-demo.
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*
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* # Style Classes # {#gtkstylecontext-classes}
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*
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* Widgets can add style classes to their context, which can be used to associate
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* different styles by class. The documentation for individual widgets lists
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* which style classes it uses itself, and which style classes may be added by
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* applications to affect their appearance.
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*
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* GTK+ defines macros for a number of style classes.
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*
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* # Custom styling in UI libraries and applications
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*
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* If you are developing a library with custom #GtkWidgets that
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* render differently than standard components, you may need to add a
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* #GtkStyleProvider yourself with the %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK
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* priority, either a #GtkCssProvider or a custom object implementing the
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* #GtkStyleProvider interface. This way themes may still attempt
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* to style your UI elements in a different way if needed so.
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*
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* If you are using custom styling on an applications, you probably want then
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* to make your style information prevail to the theme’s, so you must use
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* a #GtkStyleProvider with the %GTK_STYLE_PROVIDER_PRIORITY_APPLICATION
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* priority, keep in mind that the user settings in
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* `XDG_CONFIG_HOME/gtk-4.0/gtk.css` will
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* still take precedence over your changes, as it uses the
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* %GTK_STYLE_PROVIDER_PRIORITY_USER priority.
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*/
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#define CURSOR_ASPECT_RATIO (0.04)
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typedef struct PropertyValue PropertyValue;
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struct PropertyValue
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{
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GType widget_type;
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GParamSpec *pspec;
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GValue value;
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};
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struct _GtkStyleContextPrivate
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{
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GdkDisplay *display;
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guint cascade_changed_id;
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GtkStyleCascade *cascade;
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GtkStyleContext *parent;
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GtkCssNode *cssnode;
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GSList *saved_nodes;
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GtkCssStyleChange *invalidating_context;
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};
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typedef struct _GtkStyleContextPrivate GtkStyleContextPrivate;
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enum {
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PROP_0,
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PROP_DISPLAY,
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PROP_PARENT,
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LAST_PROP
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};
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enum {
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CHANGED,
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LAST_SIGNAL
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};
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static GParamSpec *properties[LAST_PROP] = { NULL, };
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static guint signals[LAST_SIGNAL] = { 0 };
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static void gtk_style_context_finalize (GObject *object);
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static void gtk_style_context_impl_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_style_context_impl_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static GtkCssNode * gtk_style_context_get_root (GtkStyleContext *context);
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G_DEFINE_TYPE_WITH_PRIVATE (GtkStyleContext, gtk_style_context, G_TYPE_OBJECT)
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static void
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gtk_style_context_real_changed (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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if (GTK_IS_CSS_WIDGET_NODE (priv->cssnode))
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{
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GtkWidget *widget = gtk_css_widget_node_get_widget (GTK_CSS_WIDGET_NODE (priv->cssnode));
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if (widget != NULL)
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_gtk_widget_style_context_invalidated (widget);
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}
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}
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static void
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gtk_style_context_class_init (GtkStyleContextClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = gtk_style_context_finalize;
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object_class->set_property = gtk_style_context_impl_set_property;
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object_class->get_property = gtk_style_context_impl_get_property;
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klass->changed = gtk_style_context_real_changed;
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/**
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* GtkStyleContext::changed:
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*
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* The ::changed signal is emitted when there is a change in the
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* #GtkStyleContext.
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*
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* For a #GtkStyleContext returned by gtk_widget_get_style_context(), the
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* #GtkWidget::style-updated signal/vfunc might be more convenient to use.
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*
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* This signal is useful when using the theming layer standalone.
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*/
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signals[CHANGED] =
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g_signal_new (I_("changed"),
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G_TYPE_FROM_CLASS (object_class),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GtkStyleContextClass, changed),
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NULL, NULL,
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g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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properties[PROP_DISPLAY] =
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g_param_spec_object ("display",
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P_("Display"),
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P_("The associated GdkDisplay"),
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GDK_TYPE_DISPLAY,
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GTK_PARAM_READWRITE);
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/**
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* GtkStyleContext:parent:
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*
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* Sets or gets the style context’s parent. See gtk_style_context_set_parent()
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* for details.
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*/
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properties[PROP_PARENT] =
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g_param_spec_object ("parent",
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P_("Parent"),
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P_("The parent style context"),
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GTK_TYPE_STYLE_CONTEXT,
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GTK_PARAM_READWRITE);
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g_object_class_install_properties (object_class, LAST_PROP, properties);
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}
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static void
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gtk_style_context_pop_style_node (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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g_return_if_fail (priv->saved_nodes != NULL);
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if (GTK_IS_CSS_TRANSIENT_NODE (priv->cssnode))
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gtk_css_node_set_parent (priv->cssnode, NULL);
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g_object_unref (priv->cssnode);
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priv->cssnode = priv->saved_nodes->data;
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priv->saved_nodes = g_slist_remove (priv->saved_nodes, priv->cssnode);
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}
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static void
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gtk_style_context_cascade_changed (GtkStyleCascade *cascade,
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GtkStyleContext *context)
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{
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gtk_css_node_invalidate_style_provider (gtk_style_context_get_root (context));
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}
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static void
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gtk_style_context_set_cascade (GtkStyleContext *context,
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GtkStyleCascade *cascade)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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if (priv->cascade == cascade)
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return;
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if (priv->cascade)
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{
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g_signal_handler_disconnect (priv->cascade, priv->cascade_changed_id);
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priv->cascade_changed_id = 0;
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g_object_unref (priv->cascade);
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}
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if (cascade)
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{
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g_object_ref (cascade);
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priv->cascade_changed_id = g_signal_connect (cascade,
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"-gtk-private-changed",
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G_CALLBACK (gtk_style_context_cascade_changed),
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context);
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}
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priv->cascade = cascade;
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if (cascade && priv->cssnode != NULL)
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gtk_style_context_cascade_changed (cascade, context);
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}
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static void
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gtk_style_context_init (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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priv->display = gdk_display_get_default ();
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if (priv->display == NULL)
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g_error ("Can't create a GtkStyleContext without a display connection");
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gtk_style_context_set_cascade (context,
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_gtk_settings_get_style_cascade (gtk_settings_get_for_display (priv->display), 1));
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}
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static void
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gtk_style_context_clear_parent (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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if (priv->parent)
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g_object_unref (priv->parent);
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}
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static void
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gtk_style_context_finalize (GObject *object)
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{
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GtkStyleContext *context = GTK_STYLE_CONTEXT (object);
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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while (priv->saved_nodes)
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gtk_style_context_pop_style_node (context);
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if (GTK_IS_CSS_PATH_NODE (priv->cssnode))
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gtk_css_path_node_unset_context (GTK_CSS_PATH_NODE (priv->cssnode));
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gtk_style_context_clear_parent (context);
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gtk_style_context_set_cascade (context, NULL);
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if (priv->cssnode)
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g_object_unref (priv->cssnode);
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G_OBJECT_CLASS (gtk_style_context_parent_class)->finalize (object);
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}
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static void
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gtk_style_context_impl_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkStyleContext *context = GTK_STYLE_CONTEXT (object);
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switch (prop_id)
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{
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case PROP_DISPLAY:
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gtk_style_context_set_display (context, g_value_get_object (value));
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break;
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case PROP_PARENT:
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gtk_style_context_set_parent (context, g_value_get_object (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_style_context_impl_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkStyleContext *context = GTK_STYLE_CONTEXT (object);
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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switch (prop_id)
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{
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case PROP_DISPLAY:
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g_value_set_object (value, priv->display);
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break;
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case PROP_PARENT:
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g_value_set_object (value, priv->parent);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/* returns TRUE if someone called gtk_style_context_save() but hasn’t
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* called gtk_style_context_restore() yet.
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* In those situations we don’t invalidate the context when somebody
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* changes state/classes.
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*/
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static gboolean
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gtk_style_context_is_saved (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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return priv->saved_nodes != NULL;
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}
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static GtkCssNode *
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gtk_style_context_get_root (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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if (priv->saved_nodes != NULL)
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return g_slist_last (priv->saved_nodes)->data;
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else
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return priv->cssnode;
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}
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GtkStyleProvider *
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gtk_style_context_get_style_provider (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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return GTK_STYLE_PROVIDER (priv->cascade);
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}
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static gboolean
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gtk_style_context_has_custom_cascade (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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GtkSettings *settings = gtk_settings_get_for_display (priv->display);
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return priv->cascade != _gtk_settings_get_style_cascade (settings, _gtk_style_cascade_get_scale (priv->cascade));
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}
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GtkCssStyle *
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gtk_style_context_lookup_style (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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/* Code will recreate style if it was changed */
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return gtk_css_node_get_style (priv->cssnode);
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}
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GtkCssNode*
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gtk_style_context_get_node (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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return priv->cssnode;
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}
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/**
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* gtk_style_context_new:
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*
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* Creates a standalone #GtkStyleContext, this style context
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* won’t be attached to any widget, so you may want
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* to call gtk_style_context_set_path() yourself.
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*
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* This function is only useful when using the theming layer
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* separated from GTK+, if you are using #GtkStyleContext to
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* theme #GtkWidgets, use gtk_widget_get_style_context()
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* in order to get a style context ready to theme the widget.
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*
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* Returns: A newly created #GtkStyleContext.
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**/
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GtkStyleContext *
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gtk_style_context_new (void)
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{
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GtkStyleContext *context = g_object_new (GTK_TYPE_STYLE_CONTEXT, NULL);
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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/* Create default info store */
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priv->cssnode = gtk_css_path_node_new (context);
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gtk_css_node_set_state (priv->cssnode, GTK_STATE_FLAG_DIR_LTR);
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return context;
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}
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GtkStyleContext *
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gtk_style_context_new_for_node (GtkCssNode *node)
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{
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GtkStyleContext *context;
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GtkStyleContextPrivate *priv;
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g_return_val_if_fail (GTK_IS_CSS_NODE (node), NULL);
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context = g_object_new (GTK_TYPE_STYLE_CONTEXT, NULL);
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priv = gtk_style_context_get_instance_private (context);
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priv->cssnode = g_object_ref (node);
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return context;
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}
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/**
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* gtk_style_context_add_provider:
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* @context: a #GtkStyleContext
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* @provider: a #GtkStyleProvider
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* @priority: the priority of the style provider. The lower
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* it is, the earlier it will be used in the style
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* construction. Typically this will be in the range
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* between %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and
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* %GTK_STYLE_PROVIDER_PRIORITY_USER
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*
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* Adds a style provider to @context, to be used in style construction.
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* Note that a style provider added by this function only affects
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* the style of the widget to which @context belongs. If you want
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* to affect the style of all widgets, use
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* gtk_style_context_add_provider_for_display().
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*
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* Note: If both priorities are the same, a #GtkStyleProvider
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* added through this function takes precedence over another added
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* through gtk_style_context_add_provider_for_display().
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**/
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void
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gtk_style_context_add_provider (GtkStyleContext *context,
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GtkStyleProvider *provider,
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guint priority)
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{
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GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
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if (!gtk_style_context_has_custom_cascade (context))
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{
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GtkStyleCascade *new_cascade;
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|
||
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.
|
||
**/
|
||
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.
|
||
**/
|
||
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.
|
||
**/
|
||
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.
|
||
**/
|
||
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.
|
||
**/
|
||
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
|
||
* @first_property_name: Name of the first property
|
||
* @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.
|
||
*/
|
||
void
|
||
gtk_style_context_get_valist (GtkStyleContext *context,
|
||
const char *first_property_name,
|
||
va_list args)
|
||
{
|
||
const gchar *property_name;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (first_property_name != NULL);
|
||
|
||
property_name = first_property_name;
|
||
|
||
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
|
||
* @first_property_name: Name of the first property
|
||
* @...: 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.
|
||
*/
|
||
void
|
||
gtk_style_context_get (GtkStyleContext *context,
|
||
const char *first_property_name,
|
||
...)
|
||
{
|
||
va_list args;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (first_property_name != NULL);
|
||
|
||
va_start (args, first_property_name);
|
||
gtk_style_context_get_valist (context, first_property_name, 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.
|
||
**/
|
||
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
|
||
**/
|
||
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.
|
||
**/
|
||
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
|
||
**/
|
||
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.
|
||
**/
|
||
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
|
||
**/
|
||
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.
|
||
**/
|
||
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
|
||
**/
|
||
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.
|
||
**/
|
||
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().
|
||
**/
|
||
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 { ... }
|
||
* ]|
|
||
**/
|
||
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.
|
||
**/
|
||
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
|
||
**/
|
||
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.
|
||
**/
|
||
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.
|
||
**/
|
||
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.
|
||
**/
|
||
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;
|
||
}
|
||
|
||
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.
|
||
**/
|
||
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_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.
|
||
**/
|
||
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.
|
||
**/
|
||
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.
|
||
**/
|
||
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);
|
||
|
||
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)
|
||
{
|
||
if (draw_arrow)
|
||
{
|
||
cairo_t *cr;
|
||
graphene_rect_t bounds;
|
||
|
||
get_insertion_cursor_bounds (height, direction, draw_arrow, &bounds);
|
||
cr = gtk_snapshot_append_cairo (snapshot, &bounds);
|
||
|
||
draw_insertion_cursor (context, cr, 0, 0, height, is_primary, direction, draw_arrow);
|
||
|
||
cairo_destroy (cr);
|
||
}
|
||
else
|
||
{
|
||
GdkRGBA primary_color;
|
||
GdkRGBA secondary_color;
|
||
int stem_width;
|
||
int offset;
|
||
|
||
_gtk_style_context_get_cursor_color (context, &primary_color, &secondary_color);
|
||
|
||
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;
|
||
|
||
gtk_snapshot_append_color (snapshot,
|
||
is_primary ? &primary_color : &secondary_color,
|
||
&GRAPHENE_RECT_INIT (- offset, 0, stem_width, height));
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
**/
|
||
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_display_get_keymap (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.
|
||
**/
|
||
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_display_get_keymap (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_save (snapshot);
|
||
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (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_restore (snapshot);
|
||
|
||
if (direction2 != PANGO_DIRECTION_NEUTRAL)
|
||
{
|
||
gtk_snapshot_save (snapshot);
|
||
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x + PANGO_PIXELS (cursor2->x), y + PANGO_PIXELS (cursor2->y)));
|
||
snapshot_insertion_cursor (snapshot,
|
||
context,
|
||
PANGO_PIXELS (cursor2->height),
|
||
FALSE,
|
||
direction2,
|
||
TRUE);
|
||
gtk_snapshot_restore (snapshot);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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;
|
||
}
|
||
|
||
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 *bg;
|
||
GdkRGBA color;
|
||
gchar *value;
|
||
|
||
gtk_style_context_get (context, "background-color", &bg, NULL);
|
||
value = g_strdup_printf ("%u,%u,%u",
|
||
(guint) ceil (bg->red * 65536 - bg->red),
|
||
(guint) ceil (bg->green * 65536 - bg->green),
|
||
(guint) ceil (bg->blue * 65536 - bg->blue));
|
||
attributes = add_attribute (attributes, ATK_TEXT_ATTR_BG_COLOR, value);
|
||
g_free (value);
|
||
gdk_rgba_free (bg);
|
||
|
||
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_NONE: Default value.
|
||
* @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
|
||
*/
|
||
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);
|
||
}
|