forked from AuroraMiddleware/gtk
929a56e53c
Replace most remaining uses of GTK+ in the docs and user-visible strings by GTK. Also remove some leftover "Was added in 3.x" sentences from the docs.
1360 lines
42 KiB
C
1360 lines
42 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 "gtkcsscolorvalueprivate.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 "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.
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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 #GdkDisplay and
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* RTL/LTR information set. The style context will also be updated
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* automatically if any of these settings change on the widget.
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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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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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GtkCssNode *cssnode;
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GSList *saved_nodes;
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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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LAST_PROP
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};
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static GParamSpec *properties[LAST_PROP] = { NULL, };
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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_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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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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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_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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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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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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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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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 ();
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_gtk_style_cascade_set_scale (new_cascade, _gtk_style_cascade_get_scale (priv->cascade));
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_gtk_style_cascade_set_parent (new_cascade,
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_gtk_settings_get_style_cascade (gtk_settings_get_for_display (priv->display), 1));
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_gtk_style_cascade_add_provider (new_cascade, provider, priority);
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gtk_style_context_set_cascade (context, new_cascade);
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g_object_unref (new_cascade);
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}
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else
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{
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_gtk_style_cascade_add_provider (priv->cascade, provider, priority);
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}
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}
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/**
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* gtk_style_context_remove_provider:
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* @context: a #GtkStyleContext
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* @provider: a #GtkStyleProvider
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*
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* Removes @provider from the style providers list in @context.
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**/
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void
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gtk_style_context_remove_provider (GtkStyleContext *context,
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GtkStyleProvider *provider)
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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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return;
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_gtk_style_cascade_remove_provider (priv->cascade, provider);
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}
|
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/**
|
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* gtk_style_context_add_provider_for_display:
|
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* @display: a #GdkDisplay
|
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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
|
||
* 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
|
||
*
|
||
* Adds a global style provider to @display, which will be used
|
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* in style construction for all #GtkStyleContexts under @display.
|
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*
|
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* GTK uses this to make styling information from #GtkSettings
|
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* available.
|
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*
|
||
* Note: If both priorities are the same, A #GtkStyleProvider
|
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* 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,
|
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guint priority)
|
||
{
|
||
GtkStyleCascade *cascade;
|
||
|
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g_return_if_fail (GDK_IS_DISPLAY (display));
|
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g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
|
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g_return_if_fail (!GTK_IS_SETTINGS (provider) || _gtk_settings_get_display (GTK_SETTINGS (provider)) == display);
|
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|
||
cascade = _gtk_settings_get_style_cascade (gtk_settings_get_for_display (display), 1);
|
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_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_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,
|
||
int 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
|
||
**/
|
||
int
|
||
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_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);
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
|
||
GtkCssNode *cssnode;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
|
||
/* 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));
|
||
gtk_style_context_save_to_node (context, cssnode);
|
||
|
||
g_object_unref (cssnode);
|
||
}
|
||
|
||
/**
|
||
* 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 later uses of the
|
||
* style context 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 char *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 char *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 char *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);
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
static 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_color_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 char *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);
|
||
}
|
||
|
||
/**
|
||
* gtk_style_context_get_color:
|
||
* @context: a #GtkStyleContext
|
||
* @color: (out): return value for the foreground color
|
||
*
|
||
* Gets the foreground color for a given state.
|
||
**/
|
||
void
|
||
gtk_style_context_get_color (GtkStyleContext *context,
|
||
GdkRGBA *color)
|
||
{
|
||
g_return_if_fail (color != NULL);
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
*color = *gtk_css_color_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR));
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
**/
|
||
void
|
||
gtk_style_context_get_border (GtkStyleContext *context,
|
||
GtkBorder *border)
|
||
{
|
||
GtkCssStyle *style;
|
||
|
||
g_return_if_fail (border != NULL);
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
style = gtk_style_context_lookup_style (context);
|
||
|
||
border->top = round (_gtk_css_number_value_get (style->border->border_top_width, 100));
|
||
border->right = round (_gtk_css_number_value_get (style->border->border_right_width, 100));
|
||
border->bottom = round (_gtk_css_number_value_get (style->border->border_bottom_width, 100));
|
||
border->left = round (_gtk_css_number_value_get (style->border->border_left_width, 100));
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
**/
|
||
void
|
||
gtk_style_context_get_padding (GtkStyleContext *context,
|
||
GtkBorder *padding)
|
||
{
|
||
GtkCssStyle *style;
|
||
|
||
g_return_if_fail (padding != NULL);
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
style = gtk_style_context_lookup_style (context);
|
||
|
||
padding->top = round (_gtk_css_number_value_get (style->size->padding_top, 100));
|
||
padding->right = round (_gtk_css_number_value_get (style->size->padding_right, 100));
|
||
padding->bottom = round (_gtk_css_number_value_get (style->size->padding_bottom, 100));
|
||
padding->left = round (_gtk_css_number_value_get (style->size->padding_left, 100));
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
**/
|
||
void
|
||
gtk_style_context_get_margin (GtkStyleContext *context,
|
||
GtkBorder *margin)
|
||
{
|
||
GtkCssStyle *style;
|
||
|
||
g_return_if_fail (margin != NULL);
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
style = gtk_style_context_lookup_style (context);
|
||
|
||
margin->top = round (_gtk_css_number_value_get (style->size->margin_top, 100));
|
||
margin->right = round (_gtk_css_number_value_get (style->size->margin_right, 100));
|
||
margin->bottom = round (_gtk_css_number_value_get (style->size->margin_bottom, 100));
|
||
margin->left = round (_gtk_css_number_value_get (style->size->margin_left, 100));
|
||
}
|
||
|
||
void
|
||
_gtk_style_context_get_cursor_color (GtkStyleContext *context,
|
||
GdkRGBA *primary_color,
|
||
GdkRGBA *secondary_color)
|
||
{
|
||
GtkCssStyle *style;
|
||
|
||
style = gtk_style_context_lookup_style (context);
|
||
|
||
if (primary_color)
|
||
*primary_color = *gtk_css_color_value_get_rgba (style->font->caret_color ? style->font->caret_color : style->core->color);
|
||
|
||
if (secondary_color)
|
||
*secondary_color = *gtk_css_color_value_get_rgba (style->font->secondary_caret_color ? style->font->secondary_caret_color : style->core->color);
|
||
}
|
||
|
||
static void
|
||
draw_insertion_cursor (GtkStyleContext *context,
|
||
cairo_t *cr,
|
||
double x,
|
||
double y,
|
||
double height,
|
||
float aspect_ratio,
|
||
gboolean is_primary,
|
||
PangoDirection direction,
|
||
gboolean draw_arrow)
|
||
{
|
||
GdkRGBA primary_color;
|
||
GdkRGBA secondary_color;
|
||
int stem_width;
|
||
int 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 * 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)
|
||
{
|
||
int arrow_width;
|
||
int 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 (double height,
|
||
float aspect_ratio,
|
||
PangoDirection direction,
|
||
gboolean draw_arrow,
|
||
graphene_rect_t *bounds)
|
||
{
|
||
int stem_width;
|
||
int offset;
|
||
|
||
stem_width = height * 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,
|
||
double height,
|
||
float aspect_ratio,
|
||
gboolean is_primary,
|
||
PangoDirection direction,
|
||
gboolean draw_arrow)
|
||
{
|
||
if (draw_arrow)
|
||
{
|
||
cairo_t *cr;
|
||
graphene_rect_t bounds;
|
||
|
||
get_insertion_cursor_bounds (height, aspect_ratio, direction, draw_arrow, &bounds);
|
||
cr = gtk_snapshot_append_cairo (snapshot, &bounds);
|
||
|
||
draw_insertion_cursor (context, cr, 0, 0, height, aspect_ratio, 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 * 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,
|
||
double x,
|
||
double y,
|
||
PangoLayout *layout,
|
||
int index,
|
||
PangoDirection direction)
|
||
{
|
||
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
|
||
gboolean split_cursor;
|
||
float aspect_ratio;
|
||
PangoRectangle strong_pos, weak_pos;
|
||
PangoRectangle *cursor1, *cursor2;
|
||
GdkSeat *seat;
|
||
GdkDevice *keyboard;
|
||
PangoDirection keyboard_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,
|
||
"gtk-cursor-aspect-ratio", &aspect_ratio,
|
||
NULL);
|
||
|
||
seat = gdk_display_get_default_seat (priv->display);
|
||
if (seat)
|
||
keyboard = gdk_seat_get_keyboard (seat);
|
||
else
|
||
keyboard = NULL;
|
||
if (keyboard)
|
||
keyboard_direction = gdk_device_get_direction (keyboard);
|
||
else
|
||
keyboard_direction = PANGO_DIRECTION_LTR;
|
||
|
||
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 (keyboard_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),
|
||
aspect_ratio,
|
||
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),
|
||
aspect_ratio,
|
||
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,
|
||
double x,
|
||
double y,
|
||
PangoLayout *layout,
|
||
int index,
|
||
PangoDirection direction)
|
||
{
|
||
GtkStyleContextPrivate *priv = gtk_style_context_get_instance_private (context);
|
||
gboolean split_cursor;
|
||
float aspect_ratio;
|
||
PangoRectangle strong_pos, weak_pos;
|
||
PangoRectangle *cursor1, *cursor2;
|
||
GdkSeat *seat;
|
||
GdkDevice *keyboard;
|
||
PangoDirection keyboard_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,
|
||
"gtk-cursor-aspect-ratio", &aspect_ratio,
|
||
NULL);
|
||
|
||
seat = gdk_display_get_default_seat (priv->display);
|
||
if (seat)
|
||
keyboard = gdk_seat_get_keyboard (seat);
|
||
else
|
||
keyboard = NULL;
|
||
if (keyboard)
|
||
keyboard_direction = gdk_device_get_direction (keyboard);
|
||
else
|
||
keyboard_direction = PANGO_DIRECTION_LTR;
|
||
|
||
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 (keyboard_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),
|
||
aspect_ratio,
|
||
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),
|
||
aspect_ratio,
|
||
FALSE,
|
||
direction2,
|
||
TRUE);
|
||
gtk_snapshot_restore (snapshot);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
* @GTK_STYLE_CONTEXT_PRINT_SHOW_CHANGE: Show information about
|
||
* what changes affect the styles
|
||
*
|
||
* 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);
|
||
}
|