/* 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 . */ /* * 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 #include #include #include #include #ifdef HAVE_XCOMPOSITE #include #endif #include 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; #ifdef HAVE_XCOMPOSITE Window cow; #endif 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); #ifdef HAVE_XCOMPOSITE /* * Add the composite overlay window to the cache, as this can be a reasonable * Xdnd proxy as well. * This is only done when the screen is composited in order to avoid mapping * the COW. We assume that the CM is using the COW (which is true for pretty * much any CM currently in use). */ if (gdk_display_is_composited (display)) { gdk_x11_display_error_trap_push (display); cow = XCompositeGetOverlayWindow (xdisplay, xroot_window); gdk_surface_cache_add (result, cow, 0, 0, WidthOfScreen (GDK_X11_SCREEN (screen)->xscreen), HeightOfScreen (GDK_X11_SCREEN (screen)->xscreen), TRUE); XCompositeReleaseOverlayWindow (xdisplay, xroot_window); gdk_x11_display_error_trap_pop_ignored (display); } #endif 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; }