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compositor: Add high level API to deal with MetaWindowDrag

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This helper object (and the whole window drag operation) will be
requested to the compositor instead of created directly, and only
one of those can exist at a time, so the compositor will also
safeguard that.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2683>
This commit is contained in:
Carlos Garnacho 2022-10-21 11:21:13 +02:00 committed by Marge Bot
parent e6d0e0fda6
commit fc4287cd20
2 changed files with 54 additions and 0 deletions
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8
src/compositor/compositor-private.h
View file

@ -10,6 +10,7 @@
#include "compositor/meta-compositor-view.h"
#include "compositor/meta-plugin-manager.h"
#include "compositor/meta-window-actor-private.h"
#include "compositor/meta-window-drag.h"
#include "meta/compositor.h"
#include "meta/display.h"
@ -80,6 +81,13 @@ ClutterStage * meta_compositor_get_stage (MetaCompositor *compositor);
gboolean meta_compositor_is_switching_workspace (MetaCompositor *compositor);
gboolean meta_compositor_drag_window (MetaCompositor *compositor,
MetaWindow *window,
MetaGrabOp grab_op,
uint32_t timestamp);
MetaWindowDrag * meta_compositor_get_current_window_drag (MetaCompositor *compositor);
void meta_compositor_grab_begin (MetaCompositor *compositor);
void meta_compositor_grab_end (MetaCompositor *compositor);

46
src/compositor/compositor.c
View file

@ -136,6 +136,8 @@ typedef struct _MetaCompositorPrivate
MetaPluginManager *plugin_mgr;
MetaWindowDrag *current_drag;
MetaLaters *laters;
} MetaCompositorPrivate;
@ -1673,3 +1675,47 @@ meta_compositor_get_laters (MetaCompositor *compositor)
priv = meta_compositor_get_instance_private (compositor);
return priv->laters;
}
static void
on_window_drag_ended (MetaWindowDrag *window_drag,
MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
g_assert (priv->current_drag == window_drag);
g_clear_object (&priv->current_drag);
}
gboolean
meta_compositor_drag_window (MetaCompositor *compositor,
MetaWindow *window,
MetaGrabOp grab_op,
uint32_t timestamp)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
g_autoptr (MetaWindowDrag) window_drag = NULL;
if (priv->current_drag)
return FALSE;
window_drag = meta_window_drag_new (window, grab_op);
if (!meta_window_drag_begin (window_drag, timestamp))
return FALSE;
g_signal_connect (window_drag, "ended",
G_CALLBACK (on_window_drag_ended), compositor);
priv->current_drag = g_steal_pointer (&window_drag);
return TRUE;
}
MetaWindowDrag *
meta_compositor_get_current_window_drag (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return priv->current_drag;
}