forked from AuroraMiddleware/gtk
e499a09759
Include gtkprivate.h for I_() and glib-i18n.h for gettext macros.
484 lines
14 KiB
C
484 lines
14 KiB
C
/*
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* Copyright © 2019 Red Hat, Inc.
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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 2.1 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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* Authors: Matthias Clasen <mclasen@redhat.com>
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*/
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#include "config.h"
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#include <math.h>
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#include "gtkcssboxesimplprivate.h"
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#include "gtkcsscolorvalueprivate.h"
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#include "gtkcsscornervalueprivate.h"
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#include "gtkcssnodeprivate.h"
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#include "gtkcssshadowvalueprivate.h"
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#include "gtknativeprivate.h"
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#include "gtkwidgetprivate.h"
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#include "gdk/gdksurfaceprivate.h"
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typedef struct _GtkNativePrivate
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{
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gulong update_handler_id;
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gulong layout_handler_id;
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gulong scale_changed_handler_id;
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} GtkNativePrivate;
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static GQuark quark_gtk_native_private;
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/**
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* GtkNative:
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*
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* `GtkNative` is the interface implemented by all widgets that have
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* their own `GdkSurface`.
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*
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* The obvious example of a `GtkNative` is `GtkWindow`.
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*
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* Every widget that is not itself a `GtkNative` is contained in one,
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* and you can get it with [method@Gtk.Widget.get_native].
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*
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* To get the surface of a `GtkNative`, use [method@Gtk.Native.get_surface].
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* It is also possible to find the `GtkNative` to which a surface
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* belongs, with [func@Gtk.Native.get_for_surface].
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*
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* In addition to a [class@Gdk.Surface], a `GtkNative` also provides
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* a [class@Gsk.Renderer] for rendering on that surface. To get the
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* renderer, use [method@Gtk.Native.get_renderer].
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*/
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G_DEFINE_INTERFACE (GtkNative, gtk_native, GTK_TYPE_WIDGET)
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static GskRenderer *
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gtk_native_default_get_renderer (GtkNative *self)
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{
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return NULL;
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}
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static void
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gtk_native_default_get_surface_transform (GtkNative *self,
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double *x,
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double *y)
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{
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*x = 0;
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*y = 0;
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}
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static void
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gtk_native_default_layout (GtkNative *self,
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int width,
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int height)
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{
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}
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static void
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gtk_native_default_init (GtkNativeInterface *iface)
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{
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iface->get_renderer = gtk_native_default_get_renderer;
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iface->get_surface_transform = gtk_native_default_get_surface_transform;
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iface->layout = gtk_native_default_layout;
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quark_gtk_native_private = g_quark_from_static_string ("gtk-native-private");
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}
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static void
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frame_clock_update_cb (GdkFrameClock *clock,
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GtkNative *native)
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{
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if (GTK_IS_ROOT (native))
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gtk_css_node_validate (gtk_widget_get_css_node (GTK_WIDGET (native)));
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}
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static void
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gtk_native_layout (GtkNative *self,
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int width,
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int height)
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{
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GTK_NATIVE_GET_IFACE (self)->layout (self, width, height);
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}
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static void
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surface_layout_cb (GdkSurface *surface,
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int width,
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int height,
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GtkNative *native)
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{
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gtk_native_layout (native, width, height);
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if (gtk_widget_needs_allocate (GTK_WIDGET (native)))
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gtk_native_queue_relayout (native);
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}
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static void
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scale_changed_cb (GdkSurface *surface,
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GParamSpec *pspec,
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GtkNative *native)
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{
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_gtk_widget_scale_changed (GTK_WIDGET (native));
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}
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static void
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verify_priv_unrealized (gpointer user_data)
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{
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GtkNativePrivate *priv = user_data;
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g_warn_if_fail (priv->update_handler_id == 0);
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g_warn_if_fail (priv->layout_handler_id == 0);
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g_warn_if_fail (priv->scale_changed_handler_id == 0);
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g_free (priv);
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}
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/**
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* gtk_native_realize:
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* @self: a `GtkNative`
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*
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* Realizes a `GtkNative`.
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*
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* This should only be used by subclasses.
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*/
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void
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gtk_native_realize (GtkNative *self)
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{
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GdkSurface *surface;
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GdkFrameClock *clock;
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GtkNativePrivate *priv;
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g_return_if_fail (g_object_get_qdata (G_OBJECT (self),
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quark_gtk_native_private) == NULL);
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surface = gtk_native_get_surface (self);
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clock = gdk_surface_get_frame_clock (surface);
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g_return_if_fail (clock != NULL);
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priv = g_new0 (GtkNativePrivate, 1);
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priv->update_handler_id = g_signal_connect_after (clock, "update",
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G_CALLBACK (frame_clock_update_cb),
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self);
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priv->layout_handler_id = g_signal_connect (surface, "layout",
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G_CALLBACK (surface_layout_cb),
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self);
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priv->scale_changed_handler_id = g_signal_connect (surface, "notify::scale-factor",
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G_CALLBACK (scale_changed_cb),
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self);
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g_object_set_qdata_full (G_OBJECT (self),
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quark_gtk_native_private,
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priv,
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verify_priv_unrealized);
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}
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/**
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* gtk_native_unrealize:
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* @self: a `GtkNative`
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*
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* Unrealizes a `GtkNative`.
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*
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* This should only be used by subclasses.
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*/
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void
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gtk_native_unrealize (GtkNative *self)
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{
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GtkNativePrivate *priv;
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GdkSurface *surface;
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GdkFrameClock *clock;
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priv = g_object_get_qdata (G_OBJECT (self), quark_gtk_native_private);
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g_return_if_fail (priv != NULL);
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surface = gtk_native_get_surface (self);
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clock = gdk_surface_get_frame_clock (surface);
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g_return_if_fail (clock != NULL);
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g_clear_signal_handler (&priv->update_handler_id, clock);
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g_clear_signal_handler (&priv->layout_handler_id, surface);
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g_clear_signal_handler (&priv->scale_changed_handler_id, surface);
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g_object_set_qdata (G_OBJECT (self), quark_gtk_native_private, NULL);
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}
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/**
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* gtk_native_get_surface:
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* @self: a `GtkNative`
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*
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* Returns the surface of this `GtkNative`.
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*
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* Returns: (transfer none): the surface of @self
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*/
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GdkSurface *
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gtk_native_get_surface (GtkNative *self)
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{
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g_return_val_if_fail (GTK_IS_NATIVE (self), NULL);
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return GTK_NATIVE_GET_IFACE (self)->get_surface (self);
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}
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/**
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* gtk_native_get_renderer:
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* @self: a `GtkNative`
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*
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* Returns the renderer that is used for this `GtkNative`.
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*
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* Returns: (transfer none): the renderer for @self
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*/
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GskRenderer *
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gtk_native_get_renderer (GtkNative *self)
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{
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g_return_val_if_fail (GTK_IS_NATIVE (self), NULL);
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return GTK_NATIVE_GET_IFACE (self)->get_renderer (self);
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}
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/**
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* gtk_native_get_surface_transform:
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* @self: a `GtkNative`
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* @x: (out): return location for the x coordinate
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* @y: (out): return location for the y coordinate
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*
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* Retrieves the surface transform of @self.
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*
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* This is the translation from @self's surface coordinates into
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* @self's widget coordinates.
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*/
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void
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gtk_native_get_surface_transform (GtkNative *self,
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double *x,
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double *y)
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{
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g_return_if_fail (GTK_IS_NATIVE (self));
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g_return_if_fail (x != NULL);
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g_return_if_fail (y != NULL);
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GTK_NATIVE_GET_IFACE (self)->get_surface_transform (self, x, y);
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}
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/**
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* gtk_native_get_for_surface:
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* @surface: a `GdkSurface`
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*
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* Finds the `GtkNative` associated with the surface.
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*
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* Returns: (transfer none) (nullable): the `GtkNative` that is associated with @surface
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*/
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GtkNative *
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gtk_native_get_for_surface (GdkSurface *surface)
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{
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GtkWidget *widget;
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widget = (GtkWidget *)gdk_surface_get_widget (surface);
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if (widget && GTK_IS_NATIVE (widget))
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return GTK_NATIVE (widget);
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return NULL;
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}
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void
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gtk_native_queue_relayout (GtkNative *self)
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{
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GtkWidget *widget = GTK_WIDGET (self);
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GdkSurface *surface;
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GdkFrameClock *clock;
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surface = gtk_widget_get_surface (widget);
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clock = gtk_widget_get_frame_clock (widget);
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if (clock == NULL)
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return;
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gdk_frame_clock_request_phase (clock, GDK_FRAME_CLOCK_PHASE_UPDATE);
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gdk_surface_request_layout (surface);
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}
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static void
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corner_rect (const GtkCssValue *value,
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cairo_rectangle_int_t *rect)
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{
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rect->width = _gtk_css_corner_value_get_x (value, 100);
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rect->height = _gtk_css_corner_value_get_y (value, 100);
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}
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static void
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subtract_decoration_corners_from_region (cairo_region_t *region,
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cairo_rectangle_int_t *extents,
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const GtkCssStyle *style)
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{
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cairo_rectangle_int_t rect;
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corner_rect (style->border->border_top_left_radius, &rect);
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rect.x = extents->x;
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rect.y = extents->y;
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cairo_region_subtract_rectangle (region, &rect);
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corner_rect (style->border->border_top_right_radius, &rect);
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rect.x = extents->x + extents->width - rect.width;
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rect.y = extents->y;
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cairo_region_subtract_rectangle (region, &rect);
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corner_rect (style->border->border_bottom_left_radius, &rect);
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rect.x = extents->x;
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rect.y = extents->y + extents->height - rect.height;
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cairo_region_subtract_rectangle (region, &rect);
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corner_rect (style->border->border_bottom_right_radius, &rect);
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rect.x = extents->x + extents->width - rect.width;
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rect.y = extents->y + extents->height - rect.height;
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cairo_region_subtract_rectangle (region, &rect);
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}
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static int
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get_translucent_border_edge (const GtkCssValue *color,
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const GtkCssValue *border_color,
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const GtkCssValue *border_width)
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{
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if (border_color == NULL)
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border_color = color;
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if (!gdk_rgba_is_opaque (gtk_css_color_value_get_rgba (border_color)))
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return round (_gtk_css_number_value_get (border_width, 100));
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return 0;
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}
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static void
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get_translucent_border_width (GtkWidget *widget,
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GtkBorder *border)
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{
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GtkCssNode *css_node = gtk_widget_get_css_node (widget);
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GtkCssStyle *style = gtk_css_node_get_style (css_node);
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border->top = get_translucent_border_edge (style->core->color,
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style->border->border_top_color,
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style->border->border_top_width);
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border->bottom = get_translucent_border_edge (style->core->color,
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style->border->border_bottom_color,
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style->border->border_bottom_width);
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border->left = get_translucent_border_edge (style->core->color,
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style->border->border_left_color,
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style->border->border_left_width);
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border->right = get_translucent_border_edge (style->core->color,
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style->border->border_right_color,
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style->border->border_right_width);
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}
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static gboolean
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get_opaque_rect (GtkWidget *widget,
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const GtkCssStyle *style,
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cairo_rectangle_int_t *rect)
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{
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gboolean is_opaque = gdk_rgba_is_opaque (gtk_css_color_value_get_rgba (style->background->background_color));
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if (is_opaque && gtk_widget_get_opacity (widget) < 1.0)
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is_opaque = FALSE;
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if (is_opaque)
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{
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const graphene_rect_t *border_rect;
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GtkCssBoxes css_boxes;
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GtkBorder border;
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gtk_css_boxes_init (&css_boxes, widget);
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border_rect = gtk_css_boxes_get_border_rect (&css_boxes);
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get_translucent_border_width (widget, &border);
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rect->x = border_rect->origin.x + border.left;
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rect->y = border_rect->origin.y + border.top;
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rect->width = border_rect->size.width - border.left - border.right;
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rect->height = border_rect->size.height - border.top - border.bottom;
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}
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return is_opaque;
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}
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static void
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get_shadow_width (GtkWidget *widget,
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GtkBorder *shadow_width,
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int resize_handle_size)
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{
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GtkCssNode *css_node = gtk_widget_get_css_node (widget);
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const GtkCssStyle *style = gtk_css_node_get_style (css_node);
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gtk_css_shadow_value_get_extents (style->background->box_shadow, shadow_width);
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shadow_width->left = MAX (shadow_width->left, resize_handle_size);
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shadow_width->top = MAX (shadow_width->top, resize_handle_size);
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shadow_width->bottom = MAX (shadow_width->bottom, resize_handle_size);
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shadow_width->right = MAX (shadow_width->right, resize_handle_size);
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}
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void
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gtk_native_update_opaque_region (GtkNative *native,
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GtkWidget *contents,
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gboolean subtract_decoration_corners,
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gboolean subtract_shadow,
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int resize_handle_size)
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{
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cairo_rectangle_int_t rect;
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cairo_region_t *opaque_region = NULL;
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const GtkCssStyle *style;
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GtkCssNode *css_node;
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GdkSurface *surface;
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GtkBorder shadow;
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g_return_if_fail (GTK_IS_NATIVE (native));
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g_return_if_fail (!contents || GTK_IS_WIDGET (contents));
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if (contents == NULL)
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contents = GTK_WIDGET (native);
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if (!_gtk_widget_get_realized (GTK_WIDGET (native)) ||
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!_gtk_widget_get_realized (contents))
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return;
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css_node = gtk_widget_get_css_node (contents);
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if (subtract_shadow)
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get_shadow_width (contents, &shadow, resize_handle_size);
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else
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shadow = (GtkBorder) {0, 0, 0, 0};
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surface = gtk_native_get_surface (native);
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style = gtk_css_node_get_style (css_node);
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if (get_opaque_rect (contents, style, &rect))
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{
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double native_x, native_y;
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gtk_native_get_surface_transform (native, &native_x, &native_y);
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rect.x += native_x;
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rect.y += native_y;
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if (contents != GTK_WIDGET (native))
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{
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double contents_x, contents_y;
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gtk_widget_translate_coordinates (contents, GTK_WIDGET (native), 0, 0, &contents_x, &contents_y);
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rect.x += contents_x;
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rect.y += contents_y;
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}
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opaque_region = cairo_region_create_rectangle (&rect);
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if (subtract_decoration_corners)
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subtract_decoration_corners_from_region (opaque_region, &rect, style);
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}
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gdk_surface_set_opaque_region (surface, opaque_region);
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cairo_region_destroy (opaque_region);
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}
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