forked from AuroraMiddleware/gtk
02f0681344
Float properties can not be read from keyfiles. This was causing changes to this property in settings.ini to be ignored. Fix this by changing it to a double. Technically this change could be considered an API break, but there are no users of this property as float yet and it is early enough to expect there to never be any. Also document this change in the 3 to 4 migration guide since in gtk 3 this setting will be kept a float. Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/3441
1261 lines
39 KiB
C
1261 lines
39 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 "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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*
|
||
* Adds a style provider to @context, to be used in style construction.
|
||
* 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
|
||
* to affect the style of all widgets, use
|
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* gtk_style_context_add_provider_for_display().
|
||
*
|
||
* Note: If both priorities are the same, a #GtkStyleProvider
|
||
* added through this function takes precedence over another added
|
||
* through gtk_style_context_add_provider_for_display().
|
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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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}
|
||
}
|
||
|
||
/**
|
||
* gtk_style_context_remove_provider:
|
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* @context: a #GtkStyleContext
|
||
* @provider: a #GtkStyleProvider
|
||
*
|
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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,
|
||
GtkStyleProvider *provider)
|
||
{
|
||
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));
|
||
|
||
if (!gtk_style_context_has_custom_cascade (context))
|
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return;
|
||
|
||
_gtk_style_cascade_remove_provider (priv->cascade, provider);
|
||
}
|
||
|
||
/**
|
||
* 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_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,
|
||
double 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,
|
||
double 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,
|
||
double 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_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;
|
||
double aspect_ratio;
|
||
PangoRectangle strong_pos, weak_pos;
|
||
PangoRectangle *cursor1, *cursor2;
|
||
GdkSeat *seat;
|
||
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);
|
||
|
||
keyboard_direction = PANGO_DIRECTION_LTR;
|
||
seat = gdk_display_get_default_seat (priv->display);
|
||
if (seat)
|
||
{
|
||
GdkDevice *keyboard = gdk_seat_get_keyboard (seat);
|
||
|
||
if (keyboard)
|
||
keyboard_direction = gdk_device_get_direction (keyboard);
|
||
}
|
||
|
||
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);
|
||
}
|