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gtk/gdk/x11/gdkdrag-x11.c
Benjamin Otte 0ae2acfb1a x11: Remove XComposite 
It's only used during DND to allow use of the root window's cow window
as a DND target, because apparently gnome-shell used to think that was a
great idea to DND to the overview.

Somebody complain to gnome-shell devs about it not being a good idea if
they want it fixed.
Potentially using Wayland is a better idea though.

This reverts 85ae875dcb

Related: https://bugzilla.gnome.org/show_bug.cgi?id=601731
2021-07-20 14:00:25 -04:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gdkx11dnd.h"
#include "gdk-private.h"
#include "gdkasync.h"
#include "gdkclipboardprivate.h"
#include "gdkclipboard-x11.h"
#include "gdkdeviceprivate.h"
#include "gdkdevice-xi2-private.h"
#include "gdkdisplay-x11.h"
#include "gdkdragprivate.h"
#include "gdksurfaceprivate.h"
#include "gdkinternals.h"
#include "gdkintl.h"
#include "gdkprivate-x11.h"
#include "gdkscreen-x11.h"
#include "gdkselectioninputstream-x11.h"
#include "gdkselectionoutputstream-x11.h"
#include <math.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/extensions/shape.h>
#include <string.h>
typedef enum {
GDK_DRAG_STATUS_DRAG,
GDK_DRAG_STATUS_MOTION_WAIT,
GDK_DRAG_STATUS_ACTION_WAIT,
GDK_DRAG_STATUS_DROP
} GtkDragStatus;
/*
* GdkDragProtocol:
* @GDK_DRAG_PROTO_NONE: no protocol.
* @GDK_DRAG_PROTO_XDND: The Xdnd protocol.
* @GDK_DRAG_PROTO_ROOTWIN: An extension to the Xdnd protocol for
* unclaimed root window drops.
*
* Used in `GdkDrag` to indicate the protocol according to
* which DND is done.
*/
typedef enum
{
GDK_DRAG_PROTO_NONE = 0,
GDK_DRAG_PROTO_XDND,
GDK_DRAG_PROTO_ROOTWIN
} GdkDragProtocol;
typedef struct {
guint32 xid;
int x, y, width, height;
gboolean mapped;
gboolean shape_selected;
gboolean shape_valid;
cairo_region_t *shape;
} GdkCacheChild;
struct _GdkSurfaceCache {
GList *children;
GHashTable *child_hash;
guint old_event_mask;
GdkDisplay *display;
int ref_count;
};
struct _GdkX11Drag
{
GdkDrag drag;
GdkDragProtocol protocol;
int start_x; /* Where the drag started */
int start_y;
guint16 last_x; /* Coordinates from last event */
guint16 last_y;
gulong timestamp; /* Timestamp we claimed the DND selection with */
GdkDragAction xdnd_actions; /* What is currently set in XdndActionList */
guint version; /* Xdnd protocol version */
GdkSurfaceCache *cache;
GdkSurface *drag_surface;
GdkSurface *ipc_surface;
GdkCursor *cursor;
GdkSeat *grab_seat;
GdkDragAction actions;
GdkDragAction current_action;
int hot_x;
int hot_y;
Window dest_xid; /* The last window we looked up */
Window proxy_xid; /* The proxy window for dest_xid (or dest_xid if no proxying happens) */
Window drop_xid; /* The (non-proxied) window that is receiving drops */
guint xdnd_targets_set : 1; /* Whether we've already set XdndTypeList */
guint xdnd_have_actions : 1; /* Whether an XdndActionList was provided */
guint drag_status : 4; /* current status of drag */
guint drop_failed : 1; /* Whether the drop was unsuccessful */
};
struct _GdkX11DragClass
{
GdkDragClass parent_class;
};
typedef struct {
int keysym;
int modifiers;
} GrabKey;
static GrabKey grab_keys[] = {
{ XK_Escape, 0 },
{ XK_space, 0 },
{ XK_KP_Space, 0 },
{ XK_Return, 0 },
{ XK_KP_Enter, 0 },
{ XK_Up, 0 },
{ XK_Up, Mod1Mask },
{ XK_Down, 0 },
{ XK_Down, Mod1Mask },
{ XK_Left, 0 },
{ XK_Left, Mod1Mask },
{ XK_Right, 0 },
{ XK_Right, Mod1Mask },
{ XK_KP_Up, 0 },
{ XK_KP_Up, Mod1Mask },
{ XK_KP_Down, 0 },
{ XK_KP_Down, Mod1Mask },
{ XK_KP_Left, 0 },
{ XK_KP_Left, Mod1Mask },
{ XK_KP_Right, 0 },
{ XK_KP_Right, Mod1Mask }
};
/* Forward declarations */
static GdkSurfaceCache *gdk_surface_cache_ref (GdkSurfaceCache *cache);
static void gdk_surface_cache_unref (GdkSurfaceCache *cache);
gboolean gdk_x11_drag_handle_event (GdkDrag *drag,
GdkEvent *event);
static GList *drags;
static GSList *window_caches;
G_DEFINE_TYPE (GdkX11Drag, gdk_x11_drag, GDK_TYPE_DRAG)
static void
gdk_x11_drag_init (GdkX11Drag *drag)
{
drags = g_list_prepend (drags, drag);
}
static void gdk_x11_drag_finalize (GObject *object);
static Window gdk_x11_drag_find_surface (GdkDrag *drag,
GdkSurface *drag_surface,
int x_root,
int y_root,
GdkDragProtocol *protocol);
static gboolean gdk_x11_drag_drag_motion (GdkDrag *drag,
Window proxy_xid,
GdkDragProtocol protocol,
int x_root,
int y_root,
GdkDragAction suggested_action,
GdkDragAction possible_actions,
guint32 time);
static void gdk_x11_drag_drop (GdkDrag *drag,
guint32 time_);
static GdkSurface * gdk_x11_drag_get_drag_surface (GdkDrag *drag);
static void gdk_x11_drag_set_hotspot (GdkDrag *drag,
int hot_x,
int hot_y);
static void gdk_x11_drag_drop_done (GdkDrag *drag,
gboolean success);
static void gdk_x11_drag_set_cursor (GdkDrag *drag,
GdkCursor *cursor);
static void gdk_x11_drag_cancel (GdkDrag *drag,
GdkDragCancelReason reason);
static void gdk_x11_drag_drop_performed (GdkDrag *drag,
guint32 time);
static void
gdk_x11_drag_class_init (GdkX11DragClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkDragClass *drag_class = GDK_DRAG_CLASS (klass);
object_class->finalize = gdk_x11_drag_finalize;
drag_class->get_drag_surface = gdk_x11_drag_get_drag_surface;
drag_class->set_hotspot = gdk_x11_drag_set_hotspot;
drag_class->drop_done = gdk_x11_drag_drop_done;
drag_class->set_cursor = gdk_x11_drag_set_cursor;
drag_class->cancel = gdk_x11_drag_cancel;
drag_class->drop_performed = gdk_x11_drag_drop_performed;
drag_class->handle_event = gdk_x11_drag_handle_event;
}
static void
gdk_x11_drag_finalize (GObject *object)
{
GdkDrag *drag = GDK_DRAG (object);
GdkX11Drag *x11_drag = GDK_X11_DRAG (object);
GdkSurface *drag_surface, *ipc_surface;
if (x11_drag->cache)
gdk_surface_cache_unref (x11_drag->cache);
drags = g_list_remove (drags, drag);
drag_surface = x11_drag->drag_surface;
ipc_surface = x11_drag->ipc_surface;
G_OBJECT_CLASS (gdk_x11_drag_parent_class)->finalize (object);
if (drag_surface)
gdk_surface_destroy (drag_surface);
if (ipc_surface)
gdk_surface_destroy (ipc_surface);
}
/* Drag Contexts */
GdkDrag *
gdk_x11_drag_find (GdkDisplay *display,
Window source_xid,
Window dest_xid)
{
GList *tmp_list;
GdkDrag *drag;
GdkX11Drag *drag_x11;
Window drag_dest_xid;
GdkSurface *surface;
Window surface_xid;
for (tmp_list = drags; tmp_list; tmp_list = tmp_list->next)
{
drag = (GdkDrag *)tmp_list->data;
drag_x11 = (GdkX11Drag *)drag;
if (gdk_drag_get_display (drag) != display)
continue;
g_object_get (drag, "surface", &surface, NULL);
surface_xid = surface ? GDK_SURFACE_XID (surface) : None;
g_object_unref (surface);
drag_dest_xid = drag_x11->proxy_xid
? (drag_x11->drop_xid
? drag_x11->drop_xid
: drag_x11->proxy_xid)
: None;
if (((source_xid == None) || (surface && (surface_xid == source_xid))) &&
((dest_xid == None) || (drag_dest_xid == dest_xid)))
return drag;
}
return NULL;
}
static void
precache_target_list (GdkDrag *drag)
{
GdkContentFormats *formats;
const char * const *atoms;
gsize n_atoms;
formats = gdk_content_formats_ref (gdk_drag_get_formats (drag));
formats = gdk_content_formats_union_serialize_mime_types (formats);
atoms = gdk_content_formats_get_mime_types (formats, &n_atoms);
_gdk_x11_precache_atoms (gdk_drag_get_display (drag),
(const char **) atoms,
n_atoms);
gdk_content_formats_unref (formats);
}
/* Utility functions */
static void
free_cache_child (GdkCacheChild *child,
GdkDisplay *display)
{
if (child->shape)
cairo_region_destroy (child->shape);
if (child->shape_selected && display)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
XShapeSelectInput (display_x11->xdisplay, child->xid, 0);
}
g_free (child);
}
static void
gdk_surface_cache_add (GdkSurfaceCache *cache,
guint32 xid,
int x,
int y,
int width,
int height,
gboolean mapped)
{
GdkCacheChild *child = g_new (GdkCacheChild, 1);
child->xid = xid;
child->x = x;
child->y = y;
child->width = width;
child->height = height;
child->mapped = mapped;
child->shape_selected = FALSE;
child->shape_valid = FALSE;
child->shape = NULL;
cache->children = g_list_prepend (cache->children, child);
g_hash_table_insert (cache->child_hash, GUINT_TO_POINTER (xid),
cache->children);
}
GdkFilterReturn
gdk_surface_cache_shape_filter (const XEvent *xevent,
gpointer data)
{
GdkSurfaceCache *cache = data;
GdkX11Display *display = GDK_X11_DISPLAY (cache->display);
if (display->have_shapes &&
xevent->type == display->shape_event_base + ShapeNotify)
{
XShapeEvent *xse = (XShapeEvent*)xevent;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xse->window));
if (node)
{
GdkCacheChild *child = node->data;
child->shape_valid = FALSE;
if (child->shape)
{
cairo_region_destroy (child->shape);
child->shape = NULL;
}
}
return GDK_FILTER_REMOVE;
}
return GDK_FILTER_CONTINUE;
}
GdkFilterReturn
gdk_surface_cache_filter (const XEvent *xevent,
gpointer data)
{
GdkSurfaceCache *cache = data;
switch (xevent->type)
{
case CirculateNotify:
break;
case ConfigureNotify:
{
const XConfigureEvent *xce = &xevent->xconfigure;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xce->window));
if (node)
{
GdkCacheChild *child = node->data;
child->x = xce->x;
child->y = xce->y;
child->width = xce->width;
child->height = xce->height;
if (xce->above == None && (node->next))
{
GList *last = g_list_last (cache->children);
cache->children = g_list_remove_link (cache->children, node);
last->next = node;
node->next = NULL;
node->prev = last;
}
else
{
GList *above_node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xce->above));
if (above_node && node->next != above_node)
{
/* Put the window above (before in the list) above_node */
cache->children = g_list_remove_link (cache->children, node);
node->prev = above_node->prev;
if (node->prev)
node->prev->next = node;
else
cache->children = node;
node->next = above_node;
above_node->prev = node;
}
}
}
break;
}
case CreateNotify:
{
const XCreateWindowEvent *xcwe = &xevent->xcreatewindow;
if (!g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xcwe->window)))
gdk_surface_cache_add (cache, xcwe->window,
xcwe->x, xcwe->y, xcwe->width, xcwe->height,
FALSE);
break;
}
case DestroyNotify:
{
const XDestroyWindowEvent *xdwe = &xevent->xdestroywindow;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xdwe->window));
if (node)
{
GdkCacheChild *child = node->data;
g_hash_table_remove (cache->child_hash,
GUINT_TO_POINTER (xdwe->window));
cache->children = g_list_remove_link (cache->children, node);
/* window is destroyed, no need to disable ShapeNotify */
free_cache_child (child, NULL);
g_list_free_1 (node);
}
break;
}
case MapNotify:
{
const XMapEvent *xme = &xevent->xmap;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xme->window));
if (node)
{
GdkCacheChild *child = node->data;
child->mapped = TRUE;
}
break;
}
case ReparentNotify:
break;
case UnmapNotify:
{
const XMapEvent *xume = &xevent->xmap;
GList *node;
node = g_hash_table_lookup (cache->child_hash,
GUINT_TO_POINTER (xume->window));
if (node)
{
GdkCacheChild *child = node->data;
child->mapped = FALSE;
}
break;
}
default:
return GDK_FILTER_CONTINUE;
}
return GDK_FILTER_REMOVE;
}
static GdkSurfaceCache *
gdk_surface_cache_new (GdkDisplay *display)
{
XWindowAttributes xwa;
GdkX11Screen *screen = GDK_X11_DISPLAY (display)->screen;
Display *xdisplay = GDK_SCREEN_XDISPLAY (screen);
Window xroot_window = GDK_DISPLAY_XROOTWIN (display);
GdkChildInfoX11 *children;
guint nchildren, i;
GdkSurfaceCache *result = g_new (GdkSurfaceCache, 1);
result->children = NULL;
result->child_hash = g_hash_table_new (g_direct_hash, NULL);
result->display = display;
result->ref_count = 1;
XGetWindowAttributes (xdisplay, xroot_window, &xwa);
result->old_event_mask = xwa.your_event_mask;
if (G_UNLIKELY (!GDK_X11_DISPLAY (display)->trusted_client))
{
GList *toplevel_windows, *list;
GdkSurface *surface;
GdkX11Surface *impl;
int x, y, width, height;
toplevel_windows = gdk_x11_display_get_toplevel_windows (display);
for (list = toplevel_windows; list; list = list->next)
{
surface = GDK_SURFACE (list->data);
impl = GDK_X11_SURFACE (surface);
gdk_surface_get_geometry (surface, &x, &y, &width, &height);
gdk_surface_cache_add (result, GDK_SURFACE_XID (surface),
x * impl->surface_scale, y * impl->surface_scale,
width * impl->surface_scale,
height * impl->surface_scale,
gdk_surface_get_mapped (surface));
}
return result;
}
XSelectInput (xdisplay, xroot_window, result->old_event_mask | SubstructureNotifyMask);
if (!_gdk_x11_get_window_child_info (display,
xroot_window,
FALSE, NULL,
&children, &nchildren))
return result;
for (i = 0; i < nchildren ; i++)
{
gdk_surface_cache_add (result, children[i].window,
children[i].x, children[i].y, children[i].width, children[i].height,
children[i].is_mapped);
}
g_free (children);
return result;
}
static void
gdk_surface_cache_destroy (GdkSurfaceCache *cache)
{
XSelectInput (GDK_DISPLAY_XDISPLAY (cache->display),
GDK_DISPLAY_XROOTWIN (cache->display),
cache->old_event_mask);
gdk_x11_display_error_trap_push (cache->display);
g_list_foreach (cache->children, (GFunc)free_cache_child, cache->display);
gdk_x11_display_error_trap_pop_ignored (cache->display);
g_list_free (cache->children);
g_hash_table_destroy (cache->child_hash);
g_free (cache);
}
static GdkSurfaceCache *
gdk_surface_cache_ref (GdkSurfaceCache *cache)
{
cache->ref_count += 1;
return cache;
}
static void
gdk_surface_cache_unref (GdkSurfaceCache *cache)
{
g_assert (cache->ref_count > 0);
cache->ref_count -= 1;
if (cache->ref_count == 0)
{
window_caches = g_slist_remove (window_caches, cache);
gdk_surface_cache_destroy (cache);
}
}
GdkSurfaceCache *
gdk_surface_cache_get (GdkDisplay *display)
{
GSList *list;
GdkSurfaceCache *cache;
for (list = window_caches; list; list = list->next)
{
cache = list->data;
if (cache->display == display)
return gdk_surface_cache_ref (cache);
}
cache = gdk_surface_cache_new (display);
window_caches = g_slist_prepend (window_caches, cache);
return cache;
}
static gboolean
is_pointer_within_shape (GdkDisplay *display,
GdkCacheChild *child,
int x_pos,
int y_pos)
{
if (!child->shape_selected)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
XShapeSelectInput (display_x11->xdisplay, child->xid, ShapeNotifyMask);
child->shape_selected = TRUE;
}
if (!child->shape_valid)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
cairo_region_t *input_shape;
child->shape = NULL;
if (display_x11->have_shapes)
child->shape = _gdk_x11_xwindow_get_shape (display_x11->xdisplay,
child->xid, 1, ShapeBounding);
#ifdef ShapeInput
input_shape = NULL;
if (display_x11->have_input_shapes)
input_shape = _gdk_x11_xwindow_get_shape (display_x11->xdisplay,
child->xid, 1, ShapeInput);
if (child->shape && input_shape)
{
cairo_region_intersect (child->shape, input_shape);
cairo_region_destroy (input_shape);
}
else if (input_shape)
{
child->shape = input_shape;
}
#endif
child->shape_valid = TRUE;
}
return child->shape == NULL ||
cairo_region_contains_point (child->shape, x_pos, y_pos);
}
static Window
get_client_window_at_coords_recurse (GdkDisplay *display,
Window win,
gboolean is_toplevel,
int x,
int y)
{
GdkChildInfoX11 *children;
unsigned int nchildren;
int i;
gboolean found_child = FALSE;
GdkChildInfoX11 child = { 0, };
gboolean has_wm_state = FALSE;
if (!_gdk_x11_get_window_child_info (display, win, TRUE,
is_toplevel? &has_wm_state : NULL,
&children, &nchildren))
return None;
if (has_wm_state)
{
g_free (children);
return win;
}
for (i = nchildren - 1; (i >= 0) && !found_child; i--)
{
GdkChildInfoX11 *cur_child = &children[i];
if ((cur_child->is_mapped) && (cur_child->window_class == InputOutput) &&
(x >= cur_child->x) && (x < cur_child->x + cur_child->width) &&
(y >= cur_child->y) && (y < cur_child->y + cur_child->height))
{
x -= cur_child->x;
y -= cur_child->y;
child = *cur_child;
found_child = TRUE;
}
}
g_free (children);
if (found_child)
{
if (child.has_wm_state)
return child.window;
else
return get_client_window_at_coords_recurse (display, child.window, FALSE, x, y);
}
else
return None;
}
static Window
get_client_window_at_coords (GdkSurfaceCache *cache,
Window ignore,
int x_root,
int y_root)
{
GList *tmp_list;
Window retval = None;
GdkDisplay *display;
display = cache->display;
gdk_x11_display_error_trap_push (display);
tmp_list = cache->children;
while (tmp_list && !retval)
{
GdkCacheChild *child = tmp_list->data;
if ((child->xid != ignore) && (child->mapped))
{
if ((x_root >= child->x) && (x_root < child->x + child->width) &&
(y_root >= child->y) && (y_root < child->y + child->height))
{
if (!is_pointer_within_shape (display, child,
x_root - child->x,
y_root - child->y))
{
tmp_list = tmp_list->next;
continue;
}
retval = get_client_window_at_coords_recurse (display,
child->xid, TRUE,
x_root - child->x,
y_root - child->y);
if (!retval)
retval = child->xid;
}
}
tmp_list = tmp_list->next;
}
gdk_x11_display_error_trap_pop_ignored (display);
if (retval)
return retval;
else
return GDK_DISPLAY_XROOTWIN (display);
}
/*************************************************************
***************************** XDND **************************
*************************************************************/
/* Utility functions */
static struct {
const char *name;
GdkDragAction action;
} xdnd_actions_table[] = {
{ "XdndActionCopy", GDK_ACTION_COPY },
{ "XdndActionMove", GDK_ACTION_MOVE },
{ "XdndActionLink", GDK_ACTION_LINK },
{ "XdndActionAsk", GDK_ACTION_ASK },
{ "XdndActionPrivate", GDK_ACTION_COPY },
};
static const int xdnd_n_actions = G_N_ELEMENTS (xdnd_actions_table);
static GdkDragAction
xdnd_action_from_atom (GdkDisplay *display,
Atom xatom)
{
const char *name;
int i;
if (xatom == None)
return 0;
name = gdk_x11_get_xatom_name_for_display (display, xatom);
for (i = 0; i < xdnd_n_actions; i++)
if (g_str_equal (name, xdnd_actions_table[i].name))
return xdnd_actions_table[i].action;
return 0;
}
static Atom
xdnd_action_to_atom (GdkDisplay *display,
GdkDragAction action)
{
int i;
for (i = 0; i < xdnd_n_actions; i++)
if (action == xdnd_actions_table[i].action)
return gdk_x11_get_xatom_by_name_for_display (display, xdnd_actions_table[i].name);
return None;
}
/* Source side */
void
gdk_x11_drag_handle_status (GdkDisplay *display,
const XEvent *xevent)
{
guint32 dest_surface = xevent->xclient.data.l[0];
guint32 flags = xevent->xclient.data.l[1];
Atom action = xevent->xclient.data.l[4];
GdkDrag *drag;
drag = gdk_x11_drag_find (display, xevent->xclient.window, dest_surface);
GDK_DISPLAY_NOTE (display, DND,
g_message ("XdndStatus: dest_surface: %#x action: %ld",
dest_surface, action));
if (drag)
{
GdkX11Drag *drag_x11 = GDK_X11_DRAG (drag);
if (drag_x11->drag_status == GDK_DRAG_STATUS_MOTION_WAIT)
drag_x11->drag_status = GDK_DRAG_STATUS_DRAG;
if (!(action != 0) != !(flags & 1))
{
GDK_DISPLAY_NOTE (display, DND,
g_warning ("Received status event with flags not corresponding to action!"));
action = 0;
}
gdk_drag_set_selected_action (drag, xdnd_action_from_atom (display, action));
drag_x11->current_action = action;
}
}
void
gdk_x11_drag_handle_finished (GdkDisplay *display,
const XEvent *xevent)
{
guint32 dest_surface = xevent->xclient.data.l[0];
GdkDrag *drag;
GdkX11Drag *drag_x11;
drag = gdk_x11_drag_find (display, xevent->xclient.window, dest_surface);
GDK_DISPLAY_NOTE (display, DND,
g_message ("XdndFinished: dest_surface: %#x", dest_surface));
if (drag)
{
drag_x11 = GDK_X11_DRAG (drag);
if (drag_x11->version == 5)
drag_x11->drop_failed = xevent->xclient.data.l[1] == 0;
g_signal_emit_by_name (drag, "dnd-finished");
gdk_drag_drop_done (drag, !drag_x11->drop_failed);
}
}
static void
xdnd_set_targets (GdkX11Drag *drag_x11)
{
GdkDrag *drag = GDK_DRAG (drag_x11);
Atom *atomlist;
const char * const *atoms;
gsize i, n_atoms;
GdkDisplay *display = gdk_drag_get_display (drag);
GdkContentFormats *formats;
formats = gdk_content_formats_ref (gdk_drag_get_formats (drag));
formats = gdk_content_formats_union_serialize_mime_types (formats);
atoms = gdk_content_formats_get_mime_types (formats, &n_atoms);
atomlist = g_new (Atom, n_atoms);
for (i = 0; i < n_atoms; i++)
atomlist[i] = gdk_x11_get_xatom_by_name_for_display (display, atoms[i]);
XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
GDK_SURFACE_XID (drag_x11->ipc_surface),
gdk_x11_get_xatom_by_name_for_display (display, "XdndTypeList"),
XA_ATOM, 32, PropModeReplace,
(guchar *)atomlist, n_atoms);
g_free (atomlist);
drag_x11->xdnd_targets_set = 1;
gdk_content_formats_unref (formats);
}
static void
xdnd_set_actions (GdkX11Drag *drag_x11)
{
GdkDrag *drag = GDK_DRAG (drag_x11);
Atom *atomlist;
int i;
int n_atoms;
guint actions;
GdkDisplay *display = gdk_drag_get_display (drag);
actions = gdk_drag_get_actions (drag);
n_atoms = 0;
for (i = 0; i < xdnd_n_actions; i++)
{
if (actions & xdnd_actions_table[i].action)
{
actions &= ~xdnd_actions_table[i].action;
n_atoms++;
}
}
atomlist = g_new (Atom, n_atoms);
actions = gdk_drag_get_actions (drag);
n_atoms = 0;
for (i = 0; i < xdnd_n_actions; i++)
{
if (actions & xdnd_actions_table[i].action)
{
actions &= ~xdnd_actions_table[i].action;
atomlist[n_atoms] = gdk_x11_get_xatom_by_name_for_display (display, xdnd_actions_table[i].name);
n_atoms++;
}
}
XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
GDK_SURFACE_XID (drag_x11->ipc_surface),
gdk_x11_get_xatom_by_name_for_display (display, "XdndActionList"),
XA_ATOM, 32, PropModeReplace,
(guchar *)atomlist, n_atoms);
g_free (atomlist);
drag_x11->xdnd_actions = gdk_drag_get_actions (drag);
}
static void
send_client_message_async_cb (Window window,
gboolean success,
gpointer data)
{
GdkX11Drag *drag_x11 = data;
GdkDrag *drag = data;
GDK_DISPLAY_NOTE (gdk_drag_get_display (drag), DND,
g_message ("Got async callback for #%lx, success = %d",
window, success));
/* On failure, we immediately continue with the protocol
* so we don't end up blocking for a timeout
*/
if (!success &&
window == drag_x11->proxy_xid)
{
drag_x11->proxy_xid = None;
gdk_drag_set_selected_action (drag, 0);
drag_x11->current_action = 0;
drag_x11->drag_status = GDK_DRAG_STATUS_DRAG;
}
g_object_unref (drag);
}
static void
send_client_message_async (GdkDrag *drag,
Window window,
glong event_mask,
XClientMessageEvent *event_send)
{
GdkDisplay *display = gdk_drag_get_display (drag);
g_object_ref (drag);
_gdk_x11_send_client_message_async (display, window,
FALSE, event_mask, event_send,
send_client_message_async_cb, drag);
}
static void
xdnd_send_xevent (GdkX11Drag *drag_x11,
XEvent *event_send)
{
GdkDrag *drag = GDK_DRAG (drag_x11);
GdkDisplay *display = gdk_drag_get_display (drag);
GdkSurface *surface;
glong event_mask;
g_assert (event_send->xany.type == ClientMessage);
/* We short-circuit messages to ourselves */
surface = gdk_x11_surface_lookup_for_display (display, drag_x11->proxy_xid);
if (surface)
{
if (gdk_x11_drop_filter (surface, event_send))
return;
}
if (_gdk_x11_display_is_root_window (display, drag_x11->proxy_xid))
event_mask = ButtonPressMask;
else
event_mask = 0;
send_client_message_async (drag, drag_x11->proxy_xid, event_mask,
&event_send->xclient);
}
static void
xdnd_send_enter (GdkX11Drag *drag_x11)
{
GdkDrag *drag = GDK_DRAG (drag_x11);
GdkDisplay *display = gdk_drag_get_display (drag);
GdkContentFormats *formats;
const char * const *mime_types;
gsize i, n_mime_types;
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndEnter");
xev.xclient.format = 32;
xev.xclient.window = drag_x11->drop_xid
? drag_x11->drop_xid
: drag_x11->proxy_xid;
xev.xclient.data.l[0] = GDK_SURFACE_XID (drag_x11->ipc_surface);
xev.xclient.data.l[1] = (drag_x11->version << 24); /* version */
xev.xclient.data.l[2] = 0;
xev.xclient.data.l[3] = 0;
xev.xclient.data.l[4] = 0;
GDK_DISPLAY_NOTE (display, DND,
g_message ("Sending enter source window %#lx XDND protocol version %d\n",
GDK_SURFACE_XID (drag_x11->ipc_surface), drag_x11->version));
formats = gdk_content_formats_ref (gdk_drag_get_formats (drag));
formats = gdk_content_formats_union_serialize_mime_types (formats);
mime_types = gdk_content_formats_get_mime_types (formats, &n_mime_types);
if (n_mime_types > 3)
{
if (!drag_x11->xdnd_targets_set)
xdnd_set_targets (drag_x11);
xev.xclient.data.l[1] |= 1;
}
else
{
for (i = 0; i < n_mime_types; i++)
{
xev.xclient.data.l[i + 2] = gdk_x11_get_xatom_by_name_for_display (display, mime_types[i]);
}
}
xdnd_send_xevent (drag_x11, &xev);
gdk_content_formats_unref (formats);
}
static void
xdnd_send_leave (GdkX11Drag *drag_x11)
{
GdkDrag *drag = GDK_DRAG (drag_x11);
GdkDisplay *display = gdk_drag_get_display (drag);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndLeave");
xev.xclient.format = 32;
xev.xclient.window = drag_x11->drop_xid
? drag_x11->drop_xid
: drag_x11->proxy_xid;
xev.xclient.data.l[0] = GDK_SURFACE_XID (drag_x11->ipc_surface);
xev.xclient.data.l[1] = 0;
xev.xclient.data.l[2] = 0;
xev.xclient.data.l[3] = 0;
xev.xclient.data.l[4] = 0;
xdnd_send_xevent (drag_x11, &xev);
}
static void
xdnd_send_drop (GdkX11Drag *drag_x11,
guint32 time)
{
GdkDrag *drag = GDK_DRAG (drag_x11);
GdkDisplay *display = gdk_drag_get_display (drag);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndDrop");
xev.xclient.format = 32;
xev.xclient.window = drag_x11->drop_xid
? drag_x11->drop_xid
: drag_x11->proxy_xid;
xev.xclient.data.l[0] = GDK_SURFACE_XID (drag_x11->ipc_surface);
xev.xclient.data.l[1] = 0;
xev.xclient.data.l[2] = time;
xev.xclient.data.l[3] = 0;
xev.xclient.data.l[4] = 0;
xdnd_send_xevent (drag_x11, &xev);
}
static void
xdnd_send_motion (GdkX11Drag *drag_x11,
int x_root,
int y_root,
GdkDragAction action,
guint32 time)
{
GdkDrag *drag = GDK_DRAG (drag_x11);
GdkDisplay *display = gdk_drag_get_display (drag);
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndPosition");
xev.xclient.format = 32;
xev.xclient.window = drag_x11->drop_xid
? drag_x11->drop_xid
: drag_x11->proxy_xid;
xev.xclient.data.l[0] = GDK_SURFACE_XID (drag_x11->ipc_surface);
xev.xclient.data.l[1] = 0;
xev.xclient.data.l[2] = (x_root << 16) | y_root;
xev.xclient.data.l[3] = time;
xev.xclient.data.l[4] = xdnd_action_to_atom (display, action);
xdnd_send_xevent (drag_x11, &xev);
drag_x11->drag_status = GDK_DRAG_STATUS_MOTION_WAIT;
}
static guint32
xdnd_check_dest (GdkDisplay *display,
Window win,
guint *xdnd_version)
{
gboolean retval = FALSE;
Atom type = None;
int format;
unsigned long nitems, after;
guchar *data;
Atom *version;
Window *proxy_data;
Window proxy;
Atom xdnd_proxy_atom = gdk_x11_get_xatom_by_name_for_display (display, "XdndProxy");
Atom xdnd_aware_atom = gdk_x11_get_xatom_by_name_for_display (display, "XdndAware");
proxy = None;
gdk_x11_display_error_trap_push (display);
if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), win,
xdnd_proxy_atom, 0,
1, False, AnyPropertyType,
&type, &format, &nitems, &after,
&data) == Success)
{
if (type != None)
{
proxy_data = (Window *)data;
if ((format == 32) && (nitems == 1))
{
proxy = *proxy_data;
}
else
{
GDK_DISPLAY_NOTE (display, DND,
g_warning ("Invalid XdndProxy property on window %ld", win));
}
XFree (proxy_data);
}
if ((XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), proxy ? proxy : win,
xdnd_aware_atom, 0,
1, False, AnyPropertyType,
&type, &format, &nitems, &after,
&data) == Success) &&
type != None)
{
version = (Atom *)data;
if ((format == 32) && (nitems == 1))
{
if (*version >= 3)
retval = TRUE;
if (xdnd_version)
*xdnd_version = *version;
}
else
{
GDK_DISPLAY_NOTE (display, DND,
g_warning ("Invalid XdndAware property on window %ld", win));
}
XFree (version);
}
}
gdk_x11_display_error_trap_pop_ignored (display);
return retval ? (proxy ? proxy : win) : None;
}
/* Source side */
static void
gdk_drag_do_leave (GdkX11Drag *drag_x11)
{
if (drag_x11->proxy_xid)
{
switch (drag_x11->protocol)
{
case GDK_DRAG_PROTO_XDND:
xdnd_send_leave (drag_x11);
break;
case GDK_DRAG_PROTO_ROOTWIN:
case GDK_DRAG_PROTO_NONE:
default:
break;
}
drag_x11->proxy_xid = None;
}
}
static GdkSurface *
create_drag_surface (GdkDisplay *display)
{
GdkSurface *surface;
surface = _gdk_x11_display_create_surface (display,
GDK_SURFACE_TEMP,
NULL,
0, 0, 100, 100);
return surface;
}
static Window
_gdk_x11_display_get_drag_protocol (GdkDisplay *display,
Window xid,
GdkDragProtocol *protocol,
guint *version)
{
GdkSurface *surface;
Window retval;
/* Check for a local drag */
surface = gdk_x11_surface_lookup_for_display (display, xid);
if (surface)
{
if (g_object_get_data (G_OBJECT (surface), "gdk-dnd-registered") != NULL)
{
*protocol = GDK_DRAG_PROTO_XDND;
*version = 5;
GDK_DISPLAY_NOTE (display, DND, g_message ("Entering local Xdnd window %#x\n", (guint) xid));
return xid;
}
else if (_gdk_x11_display_is_root_window (display, xid))
{
*protocol = GDK_DRAG_PROTO_ROOTWIN;
GDK_DISPLAY_NOTE (display, DND, g_message ("Entering root window\n"));
return xid;
}
}
else if ((retval = xdnd_check_dest (display, xid, version)))
{
*protocol = GDK_DRAG_PROTO_XDND;
GDK_DISPLAY_NOTE (display, DND, g_message ("Entering Xdnd window %#x\n", (guint) xid));
return retval;
}
else
{
/* Check if this is a root window */
gboolean rootwin = FALSE;
if (_gdk_x11_display_is_root_window (display, (Window) xid))
rootwin = TRUE;
if (rootwin)
{
GDK_DISPLAY_NOTE (display, DND, g_message ("Entering root window\n"));
*protocol = GDK_DRAG_PROTO_ROOTWIN;
return xid;
}
}
*protocol = GDK_DRAG_PROTO_NONE;
return 0; /* a.k.a. None */
}
static GdkSurfaceCache *
drag_find_window_cache (GdkX11Drag *drag_x11,
GdkDisplay *display)
{
if (!drag_x11->cache)
drag_x11->cache = gdk_surface_cache_get (display);
return drag_x11->cache;
}
static Window
gdk_x11_drag_find_surface (GdkDrag *drag,
GdkSurface *drag_surface,
int x_root,
int y_root,
GdkDragProtocol *protocol)
{
GdkX11Screen *screen_x11;
GdkX11Drag *drag_x11 = GDK_X11_DRAG (drag);
GdkSurfaceCache *window_cache;
GdkDisplay *display;
Window dest;
Window proxy;
display = gdk_drag_get_display (drag);
screen_x11 = GDK_X11_SCREEN(GDK_X11_DISPLAY (display)->screen);
window_cache = drag_find_window_cache (drag_x11, display);
dest = get_client_window_at_coords (window_cache,
drag_surface && GDK_IS_X11_SURFACE (drag_surface) ?
GDK_SURFACE_XID (drag_surface) : None,
x_root * screen_x11->surface_scale,
y_root * screen_x11->surface_scale);
if (drag_x11->dest_xid != dest)
{
drag_x11->dest_xid = dest;
/* Check if new destination accepts drags, and which protocol */
/* There is some ugliness here. We actually need to pass
* _three_ pieces of information to drag_motion - dest_surface,
* protocol, and the XID of the unproxied window. The first
* two are passed explicitly, the third implicitly through
* protocol->dest_xid.
*/
proxy = _gdk_x11_display_get_drag_protocol (display,
dest,
protocol,
&drag_x11->version);
}
else
{
proxy = dest;
*protocol = drag_x11->protocol;
}
return proxy;
}
static void
move_drag_surface (GdkDrag *drag,
guint x_root,
guint y_root)
{
GdkX11Drag *drag_x11 = GDK_X11_DRAG (drag);
gdk_x11_surface_move (drag_x11->drag_surface,
x_root - drag_x11->hot_x,
y_root - drag_x11->hot_y);
gdk_x11_surface_raise (drag_x11->drag_surface);
}
static gboolean
gdk_x11_drag_drag_motion (GdkDrag *drag,
Window proxy_xid,
GdkDragProtocol protocol,
int x_root,
int y_root,
GdkDragAction suggested_action,
GdkDragAction possible_actions,
guint32 time)
{
GdkX11Drag *drag_x11 = GDK_X11_DRAG (drag);
if (drag_x11->drag_surface)
move_drag_surface (drag, x_root, y_root);
gdk_drag_set_actions (drag, possible_actions);
if (protocol == GDK_DRAG_PROTO_XDND && drag_x11->version == 0)
{
/* This ugly hack is necessary since GTK doesn't know about
* the XDND protocol version, and in particular doesn't know
* that gdk_drag_find_window() has the side-effect
* of setting drag_x11->version, and therefore sometimes call
* gdk_x11_drag_drag_motion() without a prior call to
* gdk_drag_find_window(). This happens, e.g.
* when GTK is proxying DND events to embedded windows.
*/
if (proxy_xid)
{
GdkDisplay *display = gdk_drag_get_display (drag);
xdnd_check_dest (display,
proxy_xid,
&drag_x11->version);
}
}
if (drag_x11->proxy_xid != proxy_xid)
{
/* Send a leave to the last destination */
gdk_drag_do_leave (drag_x11);
drag_x11->drag_status = GDK_DRAG_STATUS_DRAG;
/* Check if new destination accepts drags, and which protocol */
if (proxy_xid)
{
drag_x11->proxy_xid = proxy_xid;
drag_x11->drop_xid = drag_x11->dest_xid;
drag_x11->protocol = protocol;
switch (protocol)
{
case GDK_DRAG_PROTO_XDND:
xdnd_send_enter (drag_x11);
break;
case GDK_DRAG_PROTO_ROOTWIN:
case GDK_DRAG_PROTO_NONE:
default:
break;
}
}
else
{
drag_x11->proxy_xid = None;
drag_x11->drop_xid = None;
gdk_drag_set_selected_action (drag, 0);
}
/* Push a status event, to let the client know that
* the drag changed
*/
drag_x11->current_action = gdk_drag_get_selected_action (drag);
}
/* When we have a Xdnd target, make sure our XdndActionList
* matches the current actions;
*/
if (protocol == GDK_DRAG_PROTO_XDND && drag_x11->xdnd_actions != gdk_drag_get_actions (drag))
{
if (proxy_xid)
{
GdkDisplay *display = gdk_drag_get_display (drag);
GdkDrop *drop = GDK_X11_DISPLAY (display)->current_drop;
if (drop && GDK_SURFACE_XID (gdk_drop_get_surface (drop)) == proxy_xid)
gdk_x11_drop_read_actions (drop);
else
xdnd_set_actions (drag_x11);
}
}
/* Send a drag-motion event */
drag_x11->last_x = x_root;
drag_x11->last_y = y_root;
if (drag_x11->proxy_xid)
{
GdkDisplay *display = gdk_drag_get_display (drag);
GdkX11Screen *screen_x11 = GDK_X11_SCREEN(GDK_X11_DISPLAY (display)->screen);
if (drag_x11->drag_status == GDK_DRAG_STATUS_DRAG)
{
switch (drag_x11->protocol)
{
case GDK_DRAG_PROTO_XDND:
xdnd_send_motion (drag_x11, x_root * screen_x11->surface_scale, y_root * screen_x11->surface_scale, suggested_action, time);
break;
case GDK_DRAG_PROTO_ROOTWIN:
{
GdkContentFormats *formats = gdk_drag_get_formats (drag);
/* GTK traditionally has used application/x-rootwin-drop,
* but the XDND spec specifies x-rootwindow-drop.
*/
if (gdk_content_formats_contain_mime_type (formats, "application/x-rootwindow-drop") ||
gdk_content_formats_contain_mime_type (formats, "application/x-rootwin-drop"))
gdk_drag_set_selected_action (drag, suggested_action);
else
gdk_drag_set_selected_action (drag, 0);
drag_x11->current_action = gdk_drag_get_selected_action (drag);
}
break;
case GDK_DRAG_PROTO_NONE:
g_warning ("Invalid drag protocol %u in gdk_x11_drag_drag_motion()", drag_x11->protocol);
break;
default:
break;
}
}
else
return TRUE;
}
return FALSE;
}
static void
gdk_x11_drag_drop (GdkDrag *drag,
guint32 time)
{
GdkX11Drag *drag_x11 = GDK_X11_DRAG (drag);
if (drag_x11->proxy_xid)
{
switch (drag_x11->protocol)
{
case GDK_DRAG_PROTO_XDND:
xdnd_send_drop (drag_x11, time);
break;
case GDK_DRAG_PROTO_ROOTWIN:
g_warning ("Drops for GDK_DRAG_PROTO_ROOTWIN must be handled internally");
break;
case GDK_DRAG_PROTO_NONE:
g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_drop()");
break;
default:
g_warning ("Drag protocol %u is not valid in gdk_drag_drop()", drag_x11->protocol);
break;
}
}
}
/* Destination side */
void
_gdk_x11_surface_register_dnd (GdkSurface *surface)
{
static const gulong xdnd_version = 5;
GdkDisplay *display = gdk_surface_get_display (surface);
g_return_if_fail (surface != NULL);
if (g_object_get_data (G_OBJECT (surface), "gdk-dnd-registered") != NULL)
return;
else
g_object_set_data (G_OBJECT (surface), "gdk-dnd-registered", GINT_TO_POINTER (TRUE));
/* Set XdndAware */
/* The property needs to be of type XA_ATOM, not XA_INTEGER. Blech */
XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
GDK_SURFACE_XID (surface),
gdk_x11_get_xatom_by_name_for_display (display, "XdndAware"),
XA_ATOM, 32, PropModeReplace,
(guchar *)&xdnd_version, 1);
}
static GdkSurface *
gdk_x11_drag_get_drag_surface (GdkDrag *drag)
{
return GDK_X11_DRAG (drag)->drag_surface;
}
static void
gdk_x11_drag_set_hotspot (GdkDrag *drag,
int hot_x,
int hot_y)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
x11_drag->hot_x = hot_x;
x11_drag->hot_y = hot_y;
if (x11_drag->grab_seat)
{
/* DnD is managed, update current position */
move_drag_surface (drag, x11_drag->last_x, x11_drag->last_y);
}
}
static void
gdk_x11_drag_default_output_done (GObject *drag,
GAsyncResult *result,
gpointer user_data)
{
GError *error = NULL;
if (!gdk_drag_write_finish (GDK_DRAG (drag), result, &error))
{
GDK_DISPLAY_NOTE (gdk_drag_get_display (GDK_DRAG (drag)), DND, g_printerr ("failed to write stream: %s\n", error->message));
g_error_free (error);
}
}
static void
gdk_x11_drag_default_output_handler (GOutputStream *stream,
const char *mime_type,
gpointer user_data)
{
gdk_drag_write_async (GDK_DRAG (user_data),
mime_type,
stream,
G_PRIORITY_DEFAULT,
NULL,
gdk_x11_drag_default_output_done,
NULL);
g_object_unref (stream);
}
static gboolean
gdk_x11_drag_xevent (GdkDisplay *display,
const XEvent *xevent,
gpointer data)
{
GdkDrag *drag = GDK_DRAG (data);
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
Window xwindow;
Atom xselection;
xwindow = GDK_SURFACE_XID (x11_drag->ipc_surface);
xselection = gdk_x11_get_xatom_by_name_for_display (display, "XdndSelection");
if (xevent->xany.window != xwindow)
return FALSE;
switch (xevent->type)
{
case SelectionClear:
if (xevent->xselectionclear.selection != xselection)
return FALSE;
if (xevent->xselectionclear.time < x11_drag->timestamp)
{
GDK_DISPLAY_NOTE (display, CLIPBOARD, g_printerr ("ignoring SelectionClear with too old timestamp (%lu vs %lu)\n",
xevent->xselectionclear.time, x11_drag->timestamp));
return FALSE;
}
GDK_DISPLAY_NOTE (display, CLIPBOARD, g_printerr ("got SelectionClear, aborting DND\n"));
gdk_drag_cancel (drag, GDK_DRAG_CANCEL_ERROR);
return TRUE;
case SelectionRequest:
{
GdkContentFormats *formats;
#ifdef G_ENABLE_DEBUG
const char *target, *property;
#endif
if (xevent->xselectionrequest.selection != xselection)
return FALSE;
#ifdef G_ENABLE_DEBUG
target = gdk_x11_get_xatom_name_for_display (display, xevent->xselectionrequest.target);
if (xevent->xselectionrequest.property == None)
property = target;
else
property = gdk_x11_get_xatom_name_for_display (display, xevent->xselectionrequest.property);
#endif
if (xevent->xselectionrequest.requestor == None)
{
GDK_DISPLAY_NOTE (display, CLIPBOARD, g_printerr ("got SelectionRequest for %s @ %s with NULL window, ignoring\n",
target, property));
return TRUE;
}
GDK_DISPLAY_NOTE (display, CLIPBOARD, g_printerr ("got SelectionRequest for %s @ %s\n",
target, property));
formats = gdk_content_formats_ref (gdk_drag_get_formats (drag));
formats = gdk_content_formats_union_serialize_mime_types (formats);
gdk_x11_selection_output_streams_create (display,
formats,
xevent->xselectionrequest.requestor,
xevent->xselectionrequest.selection,
xevent->xselectionrequest.target,
xevent->xselectionrequest.property
? xevent->xselectionrequest.property
: xevent->xselectionrequest.target,
xevent->xselectionrequest.time,
gdk_x11_drag_default_output_handler,
drag);
gdk_content_formats_unref (formats);
return TRUE;
}
case ClientMessage:
if (xevent->xclient.message_type == gdk_x11_get_xatom_by_name_for_display (display, "XdndStatus"))
gdk_x11_drag_handle_status (display, xevent);
else if (xevent->xclient.message_type == gdk_x11_get_xatom_by_name_for_display (display, "XdndFinished"))
gdk_x11_drag_handle_finished (display, xevent);
else
return FALSE;
return TRUE;
default:
return FALSE;
}
}
static double
ease_out_cubic (double t)
{
double p = t - 1;
return p * p * p + 1;
}
#define ANIM_TIME 500000 /* half a second */
typedef struct _GdkDragAnim GdkDragAnim;
struct _GdkDragAnim {
GdkX11Drag *drag;
GdkFrameClock *frame_clock;
gint64 start_time;
};
static void
gdk_drag_anim_destroy (GdkDragAnim *anim)
{
gdk_surface_hide (anim->drag->drag_surface);
g_object_unref (anim->drag);
g_slice_free (GdkDragAnim, anim);
}
static gboolean
gdk_drag_anim_timeout (gpointer data)
{
GdkDragAnim *anim = data;
GdkX11Drag *drag = anim->drag;
GdkFrameClock *frame_clock = anim->frame_clock;
gint64 current_time;
double f;
double t;
if (!frame_clock)
return G_SOURCE_REMOVE;
current_time = gdk_frame_clock_get_frame_time (frame_clock);
f = (current_time - anim->start_time) / (double) ANIM_TIME;
if (f >= 1.0)
return G_SOURCE_REMOVE;
t = ease_out_cubic (f);
gdk_x11_surface_show (drag->drag_surface, FALSE);
gdk_x11_surface_move (drag->drag_surface,
(drag->last_x - drag->hot_x) +
(drag->start_x - drag->last_x) * t,
(drag->last_y - drag->hot_y) +
(drag->start_y - drag->last_y) * t);
gdk_x11_surface_set_opacity (drag->drag_surface, 1.0 - f);
return G_SOURCE_CONTINUE;
}
static void
gdk_x11_drag_release_selection (GdkDrag *drag)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
GdkDisplay *display;
Display *xdisplay;
Window xwindow;
Atom xselection;
display = gdk_drag_get_display (drag);
xdisplay = GDK_DISPLAY_XDISPLAY (display);
xselection = gdk_x11_get_xatom_by_name_for_display (display, "XdndSelection");
xwindow = GDK_SURFACE_XID (x11_drag->ipc_surface);
if (XGetSelectionOwner (xdisplay, xselection) == xwindow)
XSetSelectionOwner (xdisplay, xselection, None, CurrentTime);
}
static void
gdk_x11_drag_drop_done (GdkDrag *drag,
gboolean success)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
GdkDragAnim *anim;
/*
cairo_surface_t *win_surface;
cairo_surface_t *surface;
cairo_t *cr;
*/
guint id;
gdk_x11_drag_release_selection (drag);
g_signal_handlers_disconnect_by_func (gdk_drag_get_display (drag),
gdk_x11_drag_xevent,
drag);
if (success)
{
gdk_surface_hide (x11_drag->drag_surface);
g_object_unref (drag);
return;
}
/*
win_surface = _gdk_surface_ref_cairo_surface (x11_drag->drag_surface);
surface = gdk_surface_create_similar_surface (x11_drag->drag_surface,
cairo_surface_get_content (win_surface),
gdk_surface_get_width (x11_drag->drag_surface),
gdk_surface_get_height (x11_drag->drag_surface));
cr = cairo_create (surface);
cairo_set_source_surface (cr, win_surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (win_surface);
pattern = cairo_pattern_create_for_surface (surface);
gdk_surface_set_background_pattern (x11_drag->drag_surface, pattern);
cairo_pattern_destroy (pattern);
cairo_surface_destroy (surface);
*/
anim = g_slice_new0 (GdkDragAnim);
anim->drag = g_object_ref (x11_drag);
anim->frame_clock = gdk_surface_get_frame_clock (x11_drag->drag_surface);
anim->start_time = gdk_frame_clock_get_frame_time (anim->frame_clock);
id = g_timeout_add_full (G_PRIORITY_DEFAULT, 17,
gdk_drag_anim_timeout, anim,
(GDestroyNotify) gdk_drag_anim_destroy);
g_source_set_name_by_id (id, "[gtk] gdk_drag_anim_timeout");
g_object_unref (drag);
}
static gboolean
drag_grab (GdkDrag *drag)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
GdkSeatCapabilities capabilities;
GdkDisplay *display;
Window root;
GdkSeat *seat;
int keycode, i;
GdkCursor *cursor;
if (!x11_drag->ipc_surface)
return FALSE;
display = gdk_drag_get_display (drag);
root = GDK_DISPLAY_XROOTWIN (display);
seat = gdk_device_get_seat (gdk_drag_get_device (drag));
capabilities = GDK_SEAT_CAPABILITY_ALL_POINTING;
cursor = gdk_drag_get_cursor (drag, x11_drag->current_action);
g_set_object (&x11_drag->cursor, cursor);
if (gdk_seat_grab (seat, x11_drag->ipc_surface,
capabilities, FALSE,
x11_drag->cursor, NULL, NULL, NULL) != GDK_GRAB_SUCCESS)
return FALSE;
g_set_object (&x11_drag->grab_seat, seat);
gdk_x11_display_error_trap_push (display);
for (i = 0; i < G_N_ELEMENTS (grab_keys); ++i)
{
int deviceid = gdk_x11_device_get_id (gdk_seat_get_keyboard (seat));
unsigned char mask[XIMaskLen(XI_LASTEVENT)];
XIGrabModifiers mods;
XIEventMask evmask;
int num_mods;
keycode = XKeysymToKeycode (GDK_DISPLAY_XDISPLAY (display),
grab_keys[i].keysym);
if (keycode == NoSymbol)
continue;
memset (mask, 0, sizeof (mask));
XISetMask (mask, XI_KeyPress);
XISetMask (mask, XI_KeyRelease);
evmask.deviceid = deviceid;
evmask.mask_len = sizeof (mask);
evmask.mask = mask;
num_mods = 1;
mods.modifiers = grab_keys[i].modifiers;
XIGrabKeycode (GDK_DISPLAY_XDISPLAY (display),
deviceid,
keycode,
root,
GrabModeAsync,
GrabModeAsync,
False,
&evmask,
num_mods,
&mods);
}
gdk_x11_display_error_trap_pop_ignored (display);
return TRUE;
}
static void
drag_ungrab (GdkDrag *drag)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
GdkDisplay *display;
GdkDevice *keyboard;
Window root;
int keycode, i;
if (!x11_drag->grab_seat)
return;
gdk_seat_ungrab (x11_drag->grab_seat);
display = gdk_drag_get_display (drag);
keyboard = gdk_seat_get_keyboard (x11_drag->grab_seat);
root = GDK_DISPLAY_XROOTWIN (display);
g_clear_object (&x11_drag->grab_seat);
for (i = 0; i < G_N_ELEMENTS (grab_keys); ++i)
{
XIGrabModifiers mods;
int num_mods;
keycode = XKeysymToKeycode (GDK_DISPLAY_XDISPLAY (display),
grab_keys[i].keysym);
if (keycode == NoSymbol)
continue;
num_mods = 1;
mods.modifiers = grab_keys[i].modifiers;
XIUngrabKeycode (GDK_DISPLAY_XDISPLAY (display),
gdk_x11_device_get_id (keyboard),
keycode,
root,
num_mods,
&mods);
}
}
GdkDrag *
_gdk_x11_surface_drag_begin (GdkSurface *surface,
GdkDevice *device,
GdkContentProvider *content,
GdkDragAction actions,
double dx,
double dy)
{
GdkX11Drag *x11_drag;
GdkDrag *drag;
GdkDisplay *display;
double px, py;
int x_root, y_root;
Atom xselection;
GdkSurface *ipc_surface;
display = gdk_surface_get_display (surface);
ipc_surface = _gdk_x11_display_create_surface (display,
GDK_SURFACE_TEMP,
NULL,
-99, -99, 1, 1);
drag = (GdkDrag *) g_object_new (GDK_TYPE_X11_DRAG,
"surface", ipc_surface,
"device", device,
"content", content,
"actions", actions,
NULL);
x11_drag = GDK_X11_DRAG (drag);
precache_target_list (drag);
gdk_x11_device_xi2_query_state (device, surface, &px, &py, NULL);
gdk_x11_surface_get_root_coords (surface,
round (px + dx),
round (py + dy),
&x_root,
&y_root);
x11_drag->start_x = x_root;
x11_drag->start_y = y_root;
x11_drag->last_x = x_root;
x11_drag->last_y = y_root;
x11_drag->protocol = GDK_DRAG_PROTO_XDND;
x11_drag->actions = actions;
x11_drag->ipc_surface = ipc_surface;
if (gdk_x11_surface_get_group (surface))
gdk_x11_surface_set_group (x11_drag->ipc_surface, surface);
gdk_surface_set_is_mapped (x11_drag->ipc_surface, TRUE);
gdk_x11_surface_show (x11_drag->ipc_surface, FALSE);
x11_drag->drag_surface = create_drag_surface (display);
if (!drag_grab (drag))
{
g_object_unref (drag);
return NULL;
}
move_drag_surface (drag, x_root, y_root);
x11_drag->timestamp = gdk_x11_get_server_time (GDK_X11_DISPLAY (display)->leader_gdk_surface);
xselection = gdk_x11_get_xatom_by_name_for_display (display, "XdndSelection");
XSetSelectionOwner (GDK_DISPLAY_XDISPLAY (display),
xselection,
GDK_SURFACE_XID (x11_drag->ipc_surface),
x11_drag->timestamp);
if (XGetSelectionOwner (GDK_DISPLAY_XDISPLAY (display), xselection) != GDK_SURFACE_XID (x11_drag->ipc_surface))
{
GDK_DISPLAY_NOTE (display, DND, g_printerr ("failed XSetSelectionOwner() on \"XdndSelection\", aborting DND\n"));
g_object_unref (drag);
return NULL;
}
g_signal_connect_object (display, "xevent", G_CALLBACK (gdk_x11_drag_xevent), drag, 0);
/* backend holds a ref until gdk_drag_drop_done is called */
g_object_ref (drag);
return drag;
}
static void
gdk_x11_drag_set_cursor (GdkDrag *drag,
GdkCursor *cursor)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
if (!g_set_object (&x11_drag->cursor, cursor))
return;
if (x11_drag->grab_seat)
{
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
gdk_device_grab (gdk_seat_get_pointer (x11_drag->grab_seat),
x11_drag->ipc_surface,
FALSE,
GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
cursor, GDK_CURRENT_TIME);
G_GNUC_END_IGNORE_DEPRECATIONS;
}
}
static void
gdk_x11_drag_cancel (GdkDrag *drag,
GdkDragCancelReason reason)
{
gdk_drag_do_leave (GDK_X11_DRAG (drag));
drag_ungrab (drag);
gdk_drag_drop_done (drag, FALSE);
}
static void
gdk_x11_drag_drop_performed (GdkDrag *drag,
guint32 time_)
{
gdk_x11_drag_drop (drag, time_);
drag_ungrab (drag);
}
#define BIG_STEP 20
#define SMALL_STEP 1
static void
gdk_drag_get_current_actions (GdkModifierType state,
int button,
GdkDragAction actions,
GdkDragAction *suggested_action,
GdkDragAction *possible_actions)
{
*suggested_action = 0;
*possible_actions = 0;
if ((button == GDK_BUTTON_MIDDLE || button == GDK_BUTTON_SECONDARY) && (actions & GDK_ACTION_ASK))
{
*suggested_action = GDK_ACTION_ASK;
*possible_actions = actions;
}
else if (state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))
{
if ((state & GDK_SHIFT_MASK) && (state & GDK_CONTROL_MASK))
{
if (actions & GDK_ACTION_LINK)
{
*suggested_action = GDK_ACTION_LINK;
*possible_actions = GDK_ACTION_LINK;
}
}
else if (state & GDK_CONTROL_MASK)
{
if (actions & GDK_ACTION_COPY)
{
*suggested_action = GDK_ACTION_COPY;
*possible_actions = GDK_ACTION_COPY;
}
}
else
{
if (actions & GDK_ACTION_MOVE)
{
*suggested_action = GDK_ACTION_MOVE;
*possible_actions = GDK_ACTION_MOVE;
}
}
}
else
{
*possible_actions = actions;
if ((state & (GDK_ALT_MASK)) && (actions & GDK_ACTION_ASK))
*suggested_action = GDK_ACTION_ASK;
else if (actions & GDK_ACTION_COPY)
*suggested_action = GDK_ACTION_COPY;
else if (actions & GDK_ACTION_MOVE)
*suggested_action = GDK_ACTION_MOVE;
else if (actions & GDK_ACTION_LINK)
*suggested_action = GDK_ACTION_LINK;
}
}
static void
gdk_drag_update (GdkDrag *drag,
double x_root,
double y_root,
GdkModifierType mods,
guint32 evtime)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
GdkDragAction suggested_action;
GdkDragAction possible_actions;
GdkDragProtocol protocol;
Window proxy;
gdk_drag_get_current_actions (mods, GDK_BUTTON_PRIMARY, x11_drag->actions,
&suggested_action, &possible_actions);
proxy = gdk_x11_drag_find_surface (drag,
x11_drag->drag_surface,
x_root, y_root, &protocol);
gdk_x11_drag_drag_motion (drag, proxy, protocol, x_root, y_root,
suggested_action, possible_actions, evtime);
}
static gboolean
gdk_dnd_handle_motion_event (GdkDrag *drag,
GdkEvent *event)
{
double x, y;
int x_root, y_root;
gdk_event_get_position (event, &x, &y);
x_root = event->surface->x + x;
y_root = event->surface->y + y;
gdk_drag_update (drag, x_root, y_root,
gdk_event_get_modifier_state (event),
gdk_event_get_time (event));
return TRUE;
}
static gboolean
gdk_dnd_handle_key_event (GdkDrag *drag,
GdkEvent *event)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
GdkModifierType state;
GdkDevice *pointer;
GdkSeat *seat;
int dx, dy;
dx = dy = 0;
state = gdk_event_get_modifier_state (event);
seat = gdk_event_get_seat (event);
pointer = gdk_seat_get_pointer (seat);
if (event->event_type == GDK_KEY_PRESS)
{
guint keyval = gdk_key_event_get_keyval (event);
switch (keyval)
{
case GDK_KEY_Escape:
gdk_drag_cancel (drag, GDK_DRAG_CANCEL_USER_CANCELLED);
return TRUE;
case GDK_KEY_space:
case GDK_KEY_Return:
case GDK_KEY_ISO_Enter:
case GDK_KEY_KP_Enter:
case GDK_KEY_KP_Space:
if ((gdk_drag_get_selected_action (drag) != 0) &&
(x11_drag->proxy_xid != None))
{
g_signal_emit_by_name (drag, "drop-performed");
}
else
gdk_drag_cancel (drag, GDK_DRAG_CANCEL_NO_TARGET);
return TRUE;
case GDK_KEY_Up:
case GDK_KEY_KP_Up:
dy = (state & GDK_ALT_MASK) ? -BIG_STEP : -SMALL_STEP;
break;
case GDK_KEY_Down:
case GDK_KEY_KP_Down:
dy = (state & GDK_ALT_MASK) ? BIG_STEP : SMALL_STEP;
break;
case GDK_KEY_Left:
case GDK_KEY_KP_Left:
dx = (state & GDK_ALT_MASK) ? -BIG_STEP : -SMALL_STEP;
break;
case GDK_KEY_Right:
case GDK_KEY_KP_Right:
dx = (state & GDK_ALT_MASK) ? BIG_STEP : SMALL_STEP;
break;
default:
break;
}
}
/* The state is not yet updated in the event, so we need
* to query it here. We could use XGetModifierMapping, but
* that would be overkill.
*/
gdk_x11_device_xi2_query_state (pointer, NULL, NULL, NULL, &state);
if (dx != 0 || dy != 0)
{
GdkDisplay *display;
Display *xdisplay;
GdkX11Screen *screen;
Window dest;
x11_drag->last_x += dx;
x11_drag->last_y += dy;
display = gdk_event_get_display ((GdkEvent *)event);
xdisplay = GDK_DISPLAY_XDISPLAY (display);
screen = GDK_X11_DISPLAY (display)->screen;
dest = GDK_SCREEN_XROOTWIN (screen);
XWarpPointer (xdisplay, None, dest, 0, 0, 0, 0,
round (x11_drag->last_x * screen->surface_scale),
round (x11_drag->last_y * screen->surface_scale));
}
gdk_drag_update (drag, x11_drag->last_x, x11_drag->last_y, state,
gdk_event_get_time (event));
return TRUE;
}
static gboolean
gdk_dnd_handle_grab_broken_event (GdkDrag *drag,
GdkEvent *event)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
gboolean is_implicit = gdk_grab_broken_event_get_implicit (event);
GdkSurface *grab_surface = gdk_grab_broken_event_get_grab_surface (event);
/* Don't cancel if we break the implicit grab from the initial button_press.
* Also, don't cancel if we re-grab on the widget or on our IPC window, for
* example, when changing the drag cursor.
*/
if (is_implicit ||
grab_surface == x11_drag->drag_surface ||
grab_surface == x11_drag->ipc_surface)
return FALSE;
if (gdk_event_get_device (event) != gdk_drag_get_device (drag))
return FALSE;
gdk_drag_cancel (drag, GDK_DRAG_CANCEL_ERROR);
return TRUE;
}
static gboolean
gdk_dnd_handle_button_event (GdkDrag *drag,
GdkEvent *event)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
#if 0
/* FIXME: Check the button matches */
if (event->button != x11_drag->button)
return FALSE;
#endif
if ((gdk_drag_get_selected_action (drag) != 0) &&
(x11_drag->proxy_xid != None))
{
g_signal_emit_by_name (drag, "drop-performed");
}
else
gdk_drag_cancel (drag, GDK_DRAG_CANCEL_NO_TARGET);
return TRUE;
}
gboolean
gdk_x11_drag_handle_event (GdkDrag *drag,
GdkEvent *event)
{
GdkX11Drag *x11_drag = GDK_X11_DRAG (drag);
if (!x11_drag->grab_seat)
return FALSE;
switch ((guint) event->event_type)
{
case GDK_MOTION_NOTIFY:
return gdk_dnd_handle_motion_event (drag, event);
case GDK_BUTTON_RELEASE:
return gdk_dnd_handle_button_event (drag, event);
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
return gdk_dnd_handle_key_event (drag, event);
case GDK_GRAB_BROKEN:
return gdk_dnd_handle_grab_broken_event (drag, event);
default:
break;
}
return FALSE;
}
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