/* 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, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* * 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 #include #include #include "gdk.h" /* For gdk_flush() */ #include "gdkx.h" #include "gdkdnd.h" #include "gdkproperty.h" #include "gdkprivate-x11.h" #include "gdkinternals.h" #include "gdkscreen-x11.h" #include "gdkdisplay-x11.h" typedef struct _GdkDragContextPrivateX11 GdkDragContextPrivateX11; typedef enum { GDK_DRAG_STATUS_DRAG, GDK_DRAG_STATUS_MOTION_WAIT, GDK_DRAG_STATUS_ACTION_WAIT, GDK_DRAG_STATUS_DROP } GtkDragStatus; typedef struct { guint32 xid; gint x, y, width, height; gboolean mapped; } GdkCacheChild; typedef struct { GList *children; GHashTable *child_hash; guint old_event_mask; GdkScreen *screen; } GdkWindowCache; /* Structure that holds information about a drag in progress. * this is used on both source and destination sides. */ struct _GdkDragContextPrivateX11 { GdkDragContext context; Atom motif_selection; Atom xdnd_selection; guint ref_count; guint16 last_x; /* Coordinates from last event */ guint16 last_y; GdkDragAction old_action; /* The last action we sent to the source */ GdkDragAction old_actions; /* The last actions we sent to the source */ GdkDragAction xdnd_actions; /* What is currently set in XdndActionList */ Window dest_xid; /* The last window we looked up */ Window drop_xid; /* The (non-proxied) window that is receiving drops */ guint xdnd_targets_set : 1; /* Whether we've already set XdndTypeList */ guint xdnd_actions_set : 1; /* Whether we've already set XdndActionList */ guint xdnd_have_actions : 1; /* Whether an XdndActionList was provided */ guint motif_targets_set : 1; /* Whether we've already set motif initiator info */ guint drag_status : 4; /* current status of drag */ GSList *window_caches; }; #define PRIVATE_DATA(context) ((GdkDragContextPrivateX11 *) GDK_DRAG_CONTEXT (context)->windowing_data) /* Forward declarations */ static void gdk_window_cache_destroy (GdkWindowCache *cache); static void motif_read_target_table (GdkDisplay *display); static GdkFilterReturn motif_dnd_filter (GdkXEvent *xev, GdkEvent *event, gpointer data); static GdkFilterReturn xdnd_enter_filter (GdkXEvent *xev, GdkEvent *event, gpointer data); static GdkFilterReturn xdnd_leave_filter (GdkXEvent *xev, GdkEvent *event, gpointer data); static GdkFilterReturn xdnd_position_filter (GdkXEvent *xev, GdkEvent *event, gpointer data); static GdkFilterReturn xdnd_status_filter (GdkXEvent *xev, GdkEvent *event, gpointer data); static GdkFilterReturn xdnd_finished_filter (GdkXEvent *xev, GdkEvent *event, gpointer data); static GdkFilterReturn xdnd_drop_filter (GdkXEvent *xev, GdkEvent *event, gpointer data); static void xdnd_manage_source_filter (GdkDragContext *context, GdkWindow *window, gboolean add_filter); static void gdk_drag_context_init (GdkDragContext *dragcontext); static void gdk_drag_context_class_init (GdkDragContextClass *klass); static void gdk_drag_context_finalize (GObject *object); static gpointer parent_class = NULL; static GList *contexts; GType gdk_drag_context_get_type (void) { static GType object_type = 0; if (!object_type) { static const GTypeInfo object_info = { sizeof (GdkDragContextClass), (GBaseInitFunc) NULL, (GBaseFinalizeFunc) NULL, (GClassInitFunc) gdk_drag_context_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GdkDragContext), 0, /* n_preallocs */ (GInstanceInitFunc) gdk_drag_context_init, }; object_type = g_type_register_static (G_TYPE_OBJECT, "GdkDragContext", &object_info, 0); } return object_type; } static void gdk_drag_context_init (GdkDragContext *dragcontext) { GdkDragContextPrivateX11 *private; private = g_new0 (GdkDragContextPrivateX11, 1); dragcontext->windowing_data = private; contexts = g_list_prepend (contexts, dragcontext); } static void gdk_drag_context_class_init (GdkDragContextClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); parent_class = g_type_class_peek_parent (klass); object_class->finalize = gdk_drag_context_finalize; } static void gdk_drag_context_finalize (GObject *object) { GdkDragContext *context = GDK_DRAG_CONTEXT (object); GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); GSList *tmp_list; g_list_free (context->targets); if (context->source_window) { if ((context->protocol == GDK_DRAG_PROTO_XDND) && !context->is_source) xdnd_manage_source_filter (context, context->source_window, FALSE); g_object_unref (context->source_window); } if (context->dest_window) g_object_unref (context->dest_window); for (tmp_list = private->window_caches; tmp_list; tmp_list = tmp_list->next) gdk_window_cache_destroy (tmp_list->data); g_slist_free (private->window_caches); contexts = g_list_remove (contexts, context); g_free (private); G_OBJECT_CLASS (parent_class)->finalize (object); } /* Drag Contexts */ GdkDragContext * gdk_drag_context_new (void) { return g_object_new (gdk_drag_context_get_type (), NULL); } void gdk_drag_context_ref (GdkDragContext *context) { g_return_if_fail (GDK_IS_DRAG_CONTEXT (context)); g_object_ref (context); } void gdk_drag_context_unref (GdkDragContext *context) { g_return_if_fail (GDK_IS_DRAG_CONTEXT (context)); g_object_unref (context); } static GdkDragContext * gdk_drag_context_find (GdkDisplay *display, gboolean is_source, Window source_xid, Window dest_xid) { GList *tmp_list = contexts; GdkDragContext *context; GdkDragContextPrivateX11 *private; Window context_dest_xid; while (tmp_list) { context = (GdkDragContext *)tmp_list->data; private = PRIVATE_DATA (context); if ((context->source_window && gdk_drawable_get_display (context->source_window) != display) || (context->dest_window && gdk_drawable_get_display (context->dest_window) != display)) continue; context_dest_xid = context->dest_window ? (private->drop_xid ? private->drop_xid : GDK_DRAWABLE_XID (context->dest_window)) : None; if ((!context->is_source == !is_source) && ((source_xid == None) || (context->source_window && (GDK_DRAWABLE_XID (context->source_window) == source_xid))) && ((dest_xid == None) || (context_dest_xid == dest_xid))) return context; tmp_list = tmp_list->next; } return NULL; } /* Utility functions */ static void gdk_window_cache_add (GdkWindowCache *cache, guint32 xid, gint x, gint y, gint width, gint 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; cache->children = g_list_prepend (cache->children, child); g_hash_table_insert (cache->child_hash, GUINT_TO_POINTER (xid), cache->children); } static GdkFilterReturn gdk_window_cache_filter (GdkXEvent *xev, GdkEvent *event, gpointer data) { XEvent *xevent = (XEvent *)xev; GdkWindowCache *cache = data; switch (xevent->type) { case CirculateNotify: break; case ConfigureNotify: { 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->prev != 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: { XCreateWindowEvent *xcwe = &xevent->xcreatewindow; if (!g_hash_table_lookup (cache->child_hash, GUINT_TO_POINTER (xcwe->window))) gdk_window_cache_add (cache, xcwe->window, xcwe->x, xcwe->y, xcwe->width, xcwe->height, FALSE); break; } case DestroyNotify: { XDestroyWindowEvent *xdwe = &xevent->xdestroywindow; GList *node; node = g_hash_table_lookup (cache->child_hash, GUINT_TO_POINTER (xdwe->window)); if (node) { g_hash_table_remove (cache->child_hash, GUINT_TO_POINTER (xdwe->window)); cache->children = g_list_remove_link (cache->children, node); g_free (node->data); g_list_free_1 (node); } break; } case MapNotify: { 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: { 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 GdkWindowCache * gdk_window_cache_new (GdkScreen *screen) { XWindowAttributes xwa; Window root, parent, *children; unsigned int nchildren; int i; Display *xdisplay = GDK_SCREEN_XDISPLAY (screen); GdkWindow *root_window = gdk_screen_get_root_window (screen); GdkWindowCache *result = g_new (GdkWindowCache, 1); result->children = NULL; result->child_hash = g_hash_table_new (g_direct_hash, NULL); result->screen = screen; XGetWindowAttributes (xdisplay, GDK_WINDOW_XWINDOW (root_window), &xwa); result->old_event_mask = xwa.your_event_mask; XSelectInput (xdisplay, GDK_WINDOW_XWINDOW (root_window), result->old_event_mask | SubstructureNotifyMask); gdk_window_add_filter (root_window, gdk_window_cache_filter, result); gdk_error_trap_push (); if (!XQueryTree(xdisplay, GDK_WINDOW_XWINDOW (root_window), &root, &parent, &children, &nchildren)) { gdk_error_trap_pop (); return result; } for (i = 0; i < nchildren ; i++) { if (XGetWindowAttributes (xdisplay, children[i], &xwa)) gdk_window_cache_add (result, children[i], xwa.x, xwa.y, xwa.width, xwa.height, xwa.map_state != IsUnmapped); } XFree (children); gdk_error_trap_pop (); return result; } static void gdk_window_cache_destroy (GdkWindowCache *cache) { GdkWindow *root_window = gdk_screen_get_root_window (cache->screen); XSelectInput (GDK_WINDOW_XDISPLAY (root_window), GDK_WINDOW_XWINDOW (root_window), cache->old_event_mask); gdk_window_remove_filter (root_window, gdk_window_cache_filter, cache); g_list_foreach (cache->children, (GFunc)g_free, NULL); g_list_free (cache->children); g_hash_table_destroy (cache->child_hash); g_free (cache); } static Window get_client_window_at_coords_recurse (GdkDisplay *display, Window win, gint x, gint y) { Window root, tmp_parent, *children; unsigned int nchildren; int i; Window child = None; Atom type = None; int format; unsigned long nitems, after; unsigned char *data; if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY(display), win, gdk_x11_get_xatom_by_name_for_display (display, "WM_STATE"), 0, 0, False, AnyPropertyType, &type, &format, &nitems, &after, &data) != Success) return None; if (type != None) { XFree (data); return win; } #if 0 /* This is beautiful! Damn Enlightenment and click-to-focus */ if (!XTranslateCoordinates (gdk_display, _gdk_root_window, win, x_root, y_root, &dest_x, &dest_y, &child)) return None; #else if (!XQueryTree (GDK_DISPLAY_XDISPLAY (display), win, &root, &tmp_parent, &children, &nchildren)) return 0; for (i = nchildren - 1; (i >= 0) && (child == None); i--) { XWindowAttributes xwa; if (XGetWindowAttributes (GDK_DISPLAY_XDISPLAY (display), children[i], &xwa)) { if ((xwa.map_state == IsViewable) && (xwa.class == InputOutput) && (x >= xwa.x) && (x < xwa.x + (gint)xwa.width) && (y >= xwa.y) && (y < xwa.y + (gint)xwa.height)) { x -= xwa.x; y -= xwa.y; child = children[i]; } } } XFree (children); #endif if (child) return get_client_window_at_coords_recurse (display, child, x, y); else return None; } static Window get_client_window_at_coords (GdkWindowCache *cache, Window ignore, gint x_root, gint y_root) { GList *tmp_list; Window retval = None; gdk_error_trap_push (); 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)) { retval = get_client_window_at_coords_recurse (gdk_screen_get_display (cache->screen), child->xid, x_root - child->x, y_root - child->y); if (!retval) retval = child->xid; } } tmp_list = tmp_list->next; } gdk_error_trap_pop (); if (retval) return retval; else return GDK_WINDOW_XWINDOW (gdk_screen_get_root_window (cache->screen)); } /************************************************************* ***************************** MOTIF ************************* *************************************************************/ /* values used in the message type for Motif DND */ enum { XmTOP_LEVEL_ENTER, XmTOP_LEVEL_LEAVE, XmDRAG_MOTION, XmDROP_SITE_ENTER, XmDROP_SITE_LEAVE, XmDROP_START, XmDROP_FINISH, XmDRAG_DROP_FINISH, XmOPERATION_CHANGED }; /* Values used to specify type of protocol to use */ enum { XmDRAG_NONE, XmDRAG_DROP_ONLY, XmDRAG_PREFER_PREREGISTER, XmDRAG_PREREGISTER, XmDRAG_PREFER_DYNAMIC, XmDRAG_DYNAMIC, XmDRAG_PREFER_RECEIVER }; /* Operation codes */ enum { XmDROP_NOOP, XmDROP_MOVE = 0x01, XmDROP_COPY = 0x02, XmDROP_LINK = 0x04 }; /* Drop site status */ enum { XmNO_DROP_SITE = 0x01, XmDROP_SITE_INVALID = 0x02, XmDROP_SITE_VALID = 0x03 }; /* completion status */ enum { XmDROP, XmDROP_HELP, XmDROP_CANCEL, XmDROP_INTERRUPT }; /* Byte swapping routines. The motif specification leaves it * up to us to save a few bytes in the client messages */ static gchar local_byte_order = '\0'; #ifdef G_ENABLE_DEBUG static void print_target_list (GList *targets) { while (targets) { gchar *name = gdk_atom_name (GDK_POINTER_TO_ATOM (targets->data)); g_message ("\t%s", name); g_free (name); targets = targets->next; } } #endif /* G_ENABLE_DEBUG */ static void init_byte_order (void) { guint32 myint = 0x01020304; local_byte_order = (*(gchar *)&myint == 1) ? 'B' : 'l'; } static guint16 card16_to_host (guint16 x, gchar byte_order) { if (byte_order == local_byte_order) return x; else return (x << 8) | (x >> 8); } static guint32 card32_to_host (guint32 x, gchar byte_order) { if (byte_order == local_byte_order) return x; else return (x << 24) | ((x & 0xff00) << 8) | ((x & 0xff0000) >> 8) | (x >> 24); } /* Motif packs together fields of varying length into the * client message. We can't rely on accessing these * through data.s[], data.l[], etc, because on some architectures * (i.e., Alpha) these won't be valid for format == 8. */ #define MOTIF_XCLIENT_BYTE(xevent,i) \ (xevent)->xclient.data.b[i] #define MOTIF_XCLIENT_SHORT(xevent,i) \ ((gint16 *)&((xevent)->xclient.data.b[0]))[i] #define MOTIF_XCLIENT_LONG(xevent,i) \ ((gint32 *)&((xevent)->xclient.data.b[0]))[i] #define MOTIF_UNPACK_BYTE(xevent,i) MOTIF_XCLIENT_BYTE(xevent,i) #define MOTIF_UNPACK_SHORT(xevent,i) \ card16_to_host (MOTIF_XCLIENT_SHORT(xevent,i), MOTIF_XCLIENT_BYTE(xevent, 1)) #define MOTIF_UNPACK_LONG(xevent,i) \ card32_to_host (MOTIF_XCLIENT_LONG(xevent,i), MOTIF_XCLIENT_BYTE(xevent, 1)) /***** Dest side ***********/ /* Property placed on source windows */ typedef struct _MotifDragInitiatorInfo { guint8 byte_order; guint8 protocol_version; guint16 targets_index; guint32 selection_atom; } MotifDragInitiatorInfo; /* Header for target table on the drag window */ typedef struct _MotifTargetTableHeader { guchar byte_order; guchar protocol_version; guint16 n_lists; guint32 total_size; } MotifTargetTableHeader; /* Property placed on target windows */ typedef struct _MotifDragReceiverInfo { guint8 byte_order; guint8 protocol_version; guint8 protocol_style; guint8 pad; guint32 proxy_window; guint16 num_drop_sites; guint16 padding; guint32 total_size; } MotifDragReceiverInfo; /* Target table handling */ static GdkFilterReturn motif_drag_window_filter (GdkXEvent *xevent, GdkEvent *event, gpointer data) { XEvent *xev = (XEvent *)xevent; GdkDisplay *display = GDK_WINDOW_DISPLAY (event->any.window); GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display); switch (xev->xany.type) { case DestroyNotify: display_x11->motif_drag_window = None; display_x11->motif_drag_gdk_window = NULL; break; case PropertyNotify: if (display_x11->motif_target_lists && (xev->xproperty.atom == gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_TARGETS"))) motif_read_target_table (display); break; } return GDK_FILTER_REMOVE; } static Window motif_lookup_drag_window (GdkDisplay *display, Display *lookup_xdisplay) { Window retval = None; gulong bytes_after, nitems; Atom type; gint format; guchar *data; XGetWindowProperty (lookup_xdisplay, DefaultRootWindow (lookup_xdisplay), gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_WINDOW"), 0, 1, FALSE, XA_WINDOW, &type, &format, &nitems, &bytes_after, &data); if ((format == 32) && (nitems == 1) && (bytes_after == 0)) { retval = *(Window *)data; GDK_NOTE (DND, g_message ("Found drag window %#lx\n", GDK_DISPLAY_X11 (display)->motif_drag_window)); } if (type != None) XFree (data); return retval; } /* Finds the window where global Motif drag information is stored. * If it doesn't exist and 'create' is TRUE, create one. */ static Window motif_find_drag_window (GdkDisplay *display, gboolean create) { GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display); if (!display_x11->motif_drag_window) { Atom motif_drag_window_atom = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_WINDOW"); display_x11->motif_drag_window = motif_lookup_drag_window (display, display_x11->xdisplay); if (!display_x11->motif_drag_window && create) { /* Create a persistant window. (Copied from LessTif) */ Display *persistant_xdisplay; XSetWindowAttributes attr; persistant_xdisplay = XOpenDisplay (gdk_display_get_name (display)); XSetCloseDownMode (persistant_xdisplay, RetainPermanent); XGrabServer (persistant_xdisplay); display_x11->motif_drag_window = motif_lookup_drag_window (display, persistant_xdisplay); if (!display_x11->motif_drag_window) { attr.override_redirect = True; attr.event_mask = PropertyChangeMask; display_x11->motif_drag_window = XCreateWindow (persistant_xdisplay, DefaultRootWindow (persistant_xdisplay), -100, -100, 10, 10, 0, 0, InputOnly, CopyFromParent, (CWOverrideRedirect | CWEventMask), &attr); GDK_NOTE (DND, g_message ("Created drag window %#lx\n", display_x11->motif_drag_window)); XChangeProperty (persistant_xdisplay, DefaultRootWindow (persistant_xdisplay), motif_drag_window_atom, XA_WINDOW, 32, PropModeReplace, (guchar *)&motif_drag_window_atom, 1); } XUngrabServer (persistant_xdisplay); XCloseDisplay (persistant_xdisplay); } /* There is a miniscule race condition here if the drag window * gets destroyed exactly now. */ if (display_x11->motif_drag_window) { display_x11->motif_drag_gdk_window = gdk_window_foreign_new_for_display (display, display_x11->motif_drag_window); gdk_window_add_filter (display_x11->motif_drag_gdk_window, motif_drag_window_filter, NULL); } } return display_x11->motif_drag_window; } static void motif_read_target_table (GdkDisplay *display) { GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display); gulong bytes_after, nitems; Atom type; gint format; gint i, j; Atom motif_drag_targets_atom = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_TARGETS"); if (display_x11->motif_target_lists) { for (i=0; imotif_n_target_lists; i++) g_list_free (display_x11->motif_target_lists[i]); g_free (display_x11->motif_target_lists); display_x11->motif_target_lists = NULL; display_x11->motif_n_target_lists = 0; } if (motif_find_drag_window (display, FALSE)) { MotifTargetTableHeader *header = NULL; guchar *target_bytes = NULL; guchar *p; gboolean success = FALSE; gdk_error_trap_push (); XGetWindowProperty (display_x11->xdisplay, display_x11->motif_drag_window, motif_drag_targets_atom, 0, (sizeof(MotifTargetTableHeader)+3)/4, FALSE, motif_drag_targets_atom, &type, &format, &nitems, &bytes_after, (guchar **)&header); if (gdk_error_trap_pop () || (format != 8) || (nitems < sizeof (MotifTargetTableHeader))) goto error; header->n_lists = card16_to_host (header->n_lists, header->byte_order); header->total_size = card32_to_host (header->total_size, header->byte_order); gdk_error_trap_push (); XGetWindowProperty (display_x11->xdisplay, display_x11->motif_drag_window, motif_drag_targets_atom, (sizeof(MotifTargetTableHeader)+3)/4, (header->total_size + 3)/4 - (sizeof(MotifTargetTableHeader) + 3)/4, FALSE, motif_drag_targets_atom, &type, &format, &nitems, &bytes_after, &target_bytes); if (gdk_error_trap_pop () || (format != 8) || (bytes_after != 0) || (nitems != header->total_size - sizeof(MotifTargetTableHeader))) goto error; display_x11->motif_n_target_lists = header->n_lists; display_x11->motif_target_lists = g_new0 (GList *, display_x11->motif_n_target_lists); p = target_bytes; for (i=0; in_lists; i++) { gint n_targets; guint32 *targets; if (p + sizeof(guint16) - target_bytes > nitems) goto error; n_targets = card16_to_host (*(gushort *)p, header->byte_order); /* We need to make a copy of the targets, since it may * be unaligned */ targets = g_new (guint32, n_targets); memcpy (targets, p + sizeof(guint16), sizeof(guint32) * n_targets); p += sizeof(guint16) + n_targets * sizeof(guint32); if (p - target_bytes > nitems) goto error; for (j=0; jmotif_target_lists[i] = g_list_prepend (display_x11->motif_target_lists[i], GUINT_TO_POINTER (card32_to_host (targets[j], header->byte_order))); g_free (targets); display_x11->motif_target_lists[i] = g_list_reverse (display_x11->motif_target_lists[i]); } success = TRUE; error: if (header) XFree (header); if (target_bytes) XFree (target_bytes); if (!success) { if (display_x11->motif_target_lists) { g_free (display_x11->motif_target_lists); display_x11->motif_target_lists = NULL; display_x11->motif_n_target_lists = 0; } g_warning ("Error reading Motif target table\n"); } } } static gint targets_sort_func (gconstpointer a, gconstpointer b) { return (GPOINTER_TO_UINT (a) < GPOINTER_TO_UINT (b)) ? -1 : ((GPOINTER_TO_UINT (a) > GPOINTER_TO_UINT (b)) ? 1 : 0); } /* Check if given (sorted) list is in the targets table */ static gboolean motif_target_table_check (GdkDisplay *display, GList *sorted) { GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display); GList *tmp_list1, *tmp_list2; gint i; for (i=0; imotif_n_target_lists; i++) { tmp_list1 = display_x11->motif_target_lists[i]; tmp_list2 = sorted; while (tmp_list1 && tmp_list2) { if (tmp_list1->data != tmp_list2->data) break; tmp_list1 = tmp_list1->next; tmp_list2 = tmp_list2->next; } if (!tmp_list1 && !tmp_list2) /* Found it */ return i; } return -1; } static gint motif_add_to_target_table (GdkDisplay *display, GList *targets) /* targets is list of GdkAtom */ { GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display); GList *sorted = NULL; gint index = -1; gint i; GList *tmp_list; /* make a sorted copy of the list */ while (targets) { Atom xatom = gdk_x11_atom_to_xatom_for_display (display, GDK_POINTER_TO_ATOM (targets->data)); sorted = g_list_insert_sorted (sorted, GUINT_TO_POINTER (xatom), targets_sort_func); targets = targets->next; } /* First check if it is their already */ if (display_x11->motif_target_lists) index = motif_target_table_check (display, sorted); /* We need to grab the server while doing this, to ensure * atomiticity. Ugh */ if (index < 0) { /* We need to make sure that it exists _before_ we grab the * server, since we can't open a new connection after we * grab the server. */ motif_find_drag_window (display, TRUE); gdk_x11_display_grab (display); motif_read_target_table (display); /* Check again, in case it was added in the meantime */ if (display_x11->motif_target_lists) index = motif_target_table_check (display, sorted); if (index < 0) { guint32 total_size = 0; guchar *data; guchar *p; guint16 *p16; MotifTargetTableHeader *header; if (!display_x11->motif_target_lists) { display_x11->motif_target_lists = g_new (GList *, 1); display_x11->motif_n_target_lists = 1; } else { display_x11->motif_n_target_lists++; display_x11->motif_target_lists = g_realloc (display_x11->motif_target_lists, sizeof(GList *) * display_x11->motif_n_target_lists); } display_x11->motif_target_lists[display_x11->motif_n_target_lists - 1] = sorted; sorted = NULL; index = display_x11->motif_n_target_lists - 1; total_size = sizeof (MotifTargetTableHeader); for (i = 0; i < display_x11->motif_n_target_lists ; i++) total_size += sizeof(guint16) + sizeof(guint32) * g_list_length (display_x11->motif_target_lists[i]); data = g_malloc (total_size); header = (MotifTargetTableHeader *)data; p = data + sizeof(MotifTargetTableHeader); header->byte_order = local_byte_order; header->protocol_version = 0; header->n_lists = display_x11->motif_n_target_lists; header->total_size = total_size; for (i = 0; i < display_x11->motif_n_target_lists ; i++) { guint16 n_targets = g_list_length (display_x11->motif_target_lists[i]); guint32 *targets = g_new (guint32, n_targets); guint32 *p32 = targets; tmp_list = display_x11->motif_target_lists[i]; while (tmp_list) { *p32 = GPOINTER_TO_UINT (tmp_list->data); tmp_list = tmp_list->next; p32++; } p16 = (guint16 *)p; p += sizeof(guint16); memcpy (p, targets, n_targets * sizeof(guint32)); *p16 = n_targets; p += sizeof(guint32) * n_targets; g_free (targets); } XChangeProperty (display_x11->xdisplay, display_x11->motif_drag_window, gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_TARGETS"), gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_TARGETS"), 8, PropModeReplace, data, total_size); } gdk_x11_display_ungrab (display); } g_list_free (sorted); return index; } /* Translate flags */ static void motif_dnd_translate_flags (GdkDragContext *context, guint16 flags) { guint recommended_op = flags & 0x000f; guint possible_ops = (flags & 0x0f0) >> 4; switch (recommended_op) { case XmDROP_MOVE: context->suggested_action = GDK_ACTION_MOVE; break; case XmDROP_COPY: context->suggested_action = GDK_ACTION_COPY; break; case XmDROP_LINK: context->suggested_action = GDK_ACTION_LINK; break; default: context->suggested_action = GDK_ACTION_COPY; break; } context->actions = 0; if (possible_ops & XmDROP_MOVE) context->actions |= GDK_ACTION_MOVE; if (possible_ops & XmDROP_COPY) context->actions |= GDK_ACTION_COPY; if (possible_ops & XmDROP_LINK) context->actions |= GDK_ACTION_LINK; } static guint16 motif_dnd_get_flags (GdkDragContext *context) { guint16 flags = 0; switch (context->suggested_action) { case GDK_ACTION_MOVE: flags = XmDROP_MOVE; break; case GDK_ACTION_COPY: flags = XmDROP_COPY; break; case GDK_ACTION_LINK: flags = XmDROP_LINK; break; default: flags = XmDROP_NOOP; break; } if (context->actions & GDK_ACTION_MOVE) flags |= XmDROP_MOVE << 8; if (context->actions & GDK_ACTION_COPY) flags |= XmDROP_COPY << 8; if (context->actions & GDK_ACTION_LINK) flags |= XmDROP_LINK << 8; return flags; } /* Source Side */ static void motif_set_targets (GdkDragContext *context) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); MotifDragInitiatorInfo info; gint i; GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); info.byte_order = local_byte_order; info.protocol_version = 0; info.targets_index = motif_add_to_target_table (display, context->targets); for (i=0; ; i++) { gchar buf[20]; g_snprintf(buf, 20, "_GDK_SELECTION_%d", i); private->motif_selection = gdk_x11_get_xatom_by_name_for_display (display, buf); if (!XGetSelectionOwner (GDK_DISPLAY_XDISPLAY (display), private->motif_selection)) break; } info.selection_atom = private->motif_selection; XChangeProperty (GDK_DRAWABLE_XDISPLAY (context->source_window), GDK_DRAWABLE_XID (context->source_window), private->motif_selection, gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_INITIATOR_INFO"), 8, PropModeReplace, (guchar *)&info, sizeof (info)); private->motif_targets_set = 1; } static guint32 motif_check_dest (GdkDisplay *display, Window win) { gboolean retval = FALSE; MotifDragReceiverInfo *info; Atom type = None; int format; unsigned long nitems, after; Atom motif_drag_receiver_info_atom = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_RECEIVER_INFO"); gdk_error_trap_push (); XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), win, motif_drag_receiver_info_atom, 0, (sizeof(*info)+3)/4, False, AnyPropertyType, &type, &format, &nitems, &after, (guchar **)&info); if (gdk_error_trap_pop() == 0) { if (type != None) { if ((format == 8) && (nitems == sizeof(*info))) { if ((info->protocol_version == 0) && ((info->protocol_style == XmDRAG_PREFER_PREREGISTER) || (info->protocol_style == XmDRAG_PREFER_DYNAMIC) || (info->protocol_style == XmDRAG_DYNAMIC))) retval = TRUE; } else { GDK_NOTE (DND, g_warning ("Invalid Motif drag receiver property on window %ld\n", win)); } XFree (info); } } return retval ? win : None; } static void motif_send_enter (GdkDragContext *context, guint32 time) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); XEvent xev; xev.xclient.type = ClientMessage; xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_AND_DROP_MESSAGE"); xev.xclient.format = 8; xev.xclient.window = GDK_DRAWABLE_XID (context->dest_window); MOTIF_XCLIENT_BYTE (&xev, 0) = XmTOP_LEVEL_ENTER; MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order; MOTIF_XCLIENT_SHORT (&xev, 1) = 0; MOTIF_XCLIENT_LONG (&xev, 1) = time; MOTIF_XCLIENT_LONG (&xev, 2) = GDK_DRAWABLE_XID (context->source_window); if (!private->motif_targets_set) motif_set_targets (context); MOTIF_XCLIENT_LONG (&xev, 3) = private->motif_selection; if (!_gdk_send_xevent (display, GDK_DRAWABLE_XID (context->dest_window), FALSE, 0, &xev)) GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->dest_window))); } static void motif_send_leave (GdkDragContext *context, guint32 time) { GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); XEvent xev; xev.xclient.type = ClientMessage; xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_AND_DROP_MESSAGE"); xev.xclient.format = 8; xev.xclient.window = GDK_DRAWABLE_XID (context->dest_window); MOTIF_XCLIENT_BYTE (&xev, 0) = XmTOP_LEVEL_LEAVE; MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order; MOTIF_XCLIENT_SHORT (&xev, 1) = 0; MOTIF_XCLIENT_LONG (&xev, 1) = time; MOTIF_XCLIENT_LONG (&xev, 2) = GDK_DRAWABLE_XID (context->source_window); MOTIF_XCLIENT_LONG (&xev, 3) = 0; if (!_gdk_send_xevent (display, GDK_DRAWABLE_XID (context->dest_window), FALSE, 0, &xev)) GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->dest_window))); } static gboolean motif_send_motion (GdkDragContext *context, gint x_root, gint y_root, GdkDragAction action, guint32 time) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); gboolean retval; XEvent xev; xev.xclient.type = ClientMessage; xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_AND_DROP_MESSAGE"); xev.xclient.format = 8; xev.xclient.window = GDK_DRAWABLE_XID (context->dest_window); MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order; MOTIF_XCLIENT_SHORT (&xev, 1) = motif_dnd_get_flags (context); MOTIF_XCLIENT_LONG (&xev, 1) = time; if ((context->suggested_action != private->old_action) || (context->actions != private->old_actions)) { MOTIF_XCLIENT_BYTE (&xev, 0) = XmOPERATION_CHANGED; /* private->drag_status = GDK_DRAG_STATUS_ACTION_WAIT; */ retval = TRUE; } else { MOTIF_XCLIENT_BYTE (&xev, 0) = XmDRAG_MOTION; MOTIF_XCLIENT_SHORT (&xev, 4) = x_root; MOTIF_XCLIENT_SHORT (&xev, 5) = y_root; private->drag_status = GDK_DRAG_STATUS_MOTION_WAIT; retval = FALSE; } if (!_gdk_send_xevent (display, GDK_DRAWABLE_XID (context->dest_window), FALSE, 0, &xev)) GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->dest_window))); return retval; } static void motif_send_drop (GdkDragContext *context, guint32 time) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); XEvent xev; xev.xclient.type = ClientMessage; xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_AND_DROP_MESSAGE"); xev.xclient.format = 8; xev.xclient.window = GDK_DRAWABLE_XID (context->dest_window); MOTIF_XCLIENT_BYTE (&xev, 0) = XmDROP_START; MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order; MOTIF_XCLIENT_SHORT (&xev, 1) = motif_dnd_get_flags (context); MOTIF_XCLIENT_LONG (&xev, 1) = time; MOTIF_XCLIENT_SHORT (&xev, 4) = private->last_x; MOTIF_XCLIENT_SHORT (&xev, 5) = private->last_y; MOTIF_XCLIENT_LONG (&xev, 3) = private->motif_selection; MOTIF_XCLIENT_LONG (&xev, 4) = GDK_DRAWABLE_XID (context->source_window); if (!_gdk_send_xevent (display, GDK_DRAWABLE_XID (context->dest_window), FALSE, 0, &xev)) GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->dest_window))); } /* Target Side */ static gboolean motif_read_initiator_info (GdkDisplay *display, Window source_window, Atom atom, GList **targets, Atom *selection) { GList *tmp_list; Atom type; gint format; gulong nitems; gulong bytes_after; MotifDragInitiatorInfo *initiator_info; GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display); gdk_error_trap_push (); XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), source_window, atom, 0, sizeof(*initiator_info), FALSE, gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_INITIATOR_INFO"), &type, &format, &nitems, &bytes_after, (guchar **)&initiator_info); if (gdk_error_trap_pop () || (format != 8) || (nitems != sizeof (MotifDragInitiatorInfo)) || (bytes_after != 0)) { g_warning ("Error reading initiator info\n"); return FALSE; } motif_read_target_table (display); initiator_info->targets_index = card16_to_host (initiator_info->targets_index, initiator_info->byte_order); initiator_info->selection_atom = card32_to_host (initiator_info->selection_atom, initiator_info->byte_order); if (initiator_info->targets_index >= display_x11->motif_n_target_lists) { g_warning ("Invalid target index in TOP_LEVEL_ENTER MESSAGE"); XFree (initiator_info); return GDK_FILTER_REMOVE; } tmp_list = g_list_last (display_x11->motif_target_lists[initiator_info->targets_index]); *targets = NULL; while (tmp_list) { GdkAtom atom = gdk_x11_xatom_to_atom_for_display (display, GPOINTER_TO_UINT (tmp_list->data)); *targets = g_list_prepend (*targets, GDK_ATOM_TO_POINTER (atom)); tmp_list = tmp_list->prev; } #ifdef G_ENABLE_DEBUG if (_gdk_debug_flags & GDK_DEBUG_DND) print_target_list (*targets); #endif /* G_ENABLE_DEBUG */ *selection = initiator_info->selection_atom; XFree (initiator_info); return TRUE; } static GdkDragContext * motif_drag_context_new (GdkWindow *dest_window, guint32 timestamp, guint32 source_window, guint32 atom) { GdkDragContext *new_context; GdkDragContextPrivateX11 *private; GdkDisplay *display = GDK_DRAWABLE_DISPLAY (dest_window); GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display); /* FIXME, current_dest_drag really shouldn't be NULL'd * if we error below. */ if (display_x11->current_dest_drag != NULL) { if (timestamp >= display_x11->current_dest_drag->start_time) { g_object_unref (display_x11->current_dest_drag); display_x11->current_dest_drag = NULL; } else return NULL; } new_context = gdk_drag_context_new (); private = PRIVATE_DATA (new_context); new_context->protocol = GDK_DRAG_PROTO_MOTIF; new_context->is_source = FALSE; new_context->source_window = gdk_window_lookup_for_display (display, source_window); if (new_context->source_window) g_object_ref (new_context->source_window); else { new_context->source_window = gdk_window_foreign_new_for_display (display, source_window); if (!new_context->source_window) { g_object_unref (new_context); return NULL; } } new_context->dest_window = dest_window; g_object_ref (dest_window); new_context->start_time = timestamp; if (!motif_read_initiator_info (GDK_WINDOW_DISPLAY (dest_window), source_window, atom, &new_context->targets, &private->motif_selection)) { g_object_unref (new_context); return NULL; } return new_context; } /* * The MOTIF drag protocol has no real provisions for distinguishing * multiple simultaneous drops. If the sources grab the pointer * when doing drags, that shouldn't happen, in any case. If it * does, we can't do much except hope for the best. */ static GdkFilterReturn motif_top_level_enter (GdkEvent *event, guint16 flags, guint32 timestamp, guint32 source_window, guint32 atom) { GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window)); GdkDragContext *new_context; GDK_NOTE(DND, g_message ("Motif DND top level enter: flags: %#4x time: %d source_widow: %#4x atom: %d", flags, timestamp, source_window, atom)); new_context = motif_drag_context_new (event->any.window, timestamp, source_window, atom); if (!new_context) return GDK_FILTER_REMOVE; event->dnd.type = GDK_DRAG_ENTER; event->dnd.context = new_context; g_object_ref (new_context); display_x11->current_dest_drag = new_context; return GDK_FILTER_TRANSLATE; } static GdkFilterReturn motif_top_level_leave (GdkEvent *event, guint16 flags, guint32 timestamp) { GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window)); GDK_NOTE(DND, g_message ("Motif DND top level leave: flags: %#4x time: %d", flags, timestamp)); if ((display_x11->current_dest_drag != NULL) && (display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_MOTIF) && (timestamp >= display_x11->current_dest_drag->start_time)) { event->dnd.type = GDK_DRAG_LEAVE; /* Pass ownership of context to the event */ event->dnd.context = display_x11->current_dest_drag; display_x11->current_dest_drag = NULL; return GDK_FILTER_TRANSLATE; } else return GDK_FILTER_REMOVE; } static GdkFilterReturn motif_motion (GdkEvent *event, guint16 flags, guint32 timestamp, gint16 x_root, gint16 y_root) { GdkDragContextPrivateX11 *private; GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window)); GDK_NOTE(DND, g_message ("Motif DND motion: flags: %#4x time: %d (%d, %d)", flags, timestamp, x_root, y_root)); if ((display_x11->current_dest_drag != NULL) && (display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_MOTIF) && (timestamp >= display_x11->current_dest_drag->start_time)) { private = PRIVATE_DATA (display_x11->current_dest_drag); event->dnd.type = GDK_DRAG_MOTION; event->dnd.context = display_x11->current_dest_drag; g_object_ref (display_x11->current_dest_drag); event->dnd.time = timestamp; motif_dnd_translate_flags (display_x11->current_dest_drag, flags); event->dnd.x_root = x_root; event->dnd.y_root = y_root; private->last_x = x_root; private->last_y = y_root; private->drag_status = GDK_DRAG_STATUS_MOTION_WAIT; return GDK_FILTER_TRANSLATE; } return GDK_FILTER_REMOVE; } static GdkFilterReturn motif_operation_changed (GdkEvent *event, guint16 flags, guint32 timestamp) { GdkDragContextPrivateX11 *private; GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window)); GDK_NOTE(DND, g_message ("Motif DND operation changed: flags: %#4x time: %d", flags, timestamp)); if ((display_x11->current_dest_drag != NULL) && (display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_MOTIF) && (timestamp >= display_x11->current_dest_drag->start_time)) { event->dnd.type = GDK_DRAG_MOTION; event->dnd.send_event = FALSE; event->dnd.context = display_x11->current_dest_drag; g_object_ref (display_x11->current_dest_drag); event->dnd.time = timestamp; private = PRIVATE_DATA (display_x11->current_dest_drag); motif_dnd_translate_flags (display_x11->current_dest_drag, flags); event->dnd.x_root = private->last_x; event->dnd.y_root = private->last_y; private->drag_status = GDK_DRAG_STATUS_ACTION_WAIT; return GDK_FILTER_TRANSLATE; } return GDK_FILTER_REMOVE; } static GdkFilterReturn motif_drop_start (GdkEvent *event, guint16 flags, guint32 timestamp, guint32 source_window, guint32 atom, gint16 x_root, gint16 y_root) { GdkDragContext *new_context; GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window)); GDK_NOTE(DND, g_message ("Motif DND drop start: flags: %#4x time: %d (%d, %d) source_widow: %#4x atom: %d", flags, timestamp, x_root, y_root, source_window, atom)); new_context = motif_drag_context_new (event->any.window, timestamp, source_window, atom); if (!new_context) return GDK_FILTER_REMOVE; motif_dnd_translate_flags (new_context, flags); event->dnd.type = GDK_DROP_START; event->dnd.context = new_context; event->dnd.time = timestamp; event->dnd.x_root = x_root; event->dnd.y_root = y_root; g_object_ref (new_context); display_x11->current_dest_drag = new_context; return GDK_FILTER_TRANSLATE; } static GdkFilterReturn motif_drag_status (GdkEvent *event, guint16 flags, guint32 timestamp) { GdkDragContext *context; GdkDisplay *display; GDK_NOTE (DND, g_message ("Motif status message: flags %x", flags)); display = gdk_drawable_get_display (event->any.window); if (!display) return GDK_FILTER_REMOVE; context = gdk_drag_context_find (display, TRUE, GDK_DRAWABLE_XID (event->any.window), None); if (context) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); if ((private->drag_status == GDK_DRAG_STATUS_MOTION_WAIT) || (private->drag_status == GDK_DRAG_STATUS_ACTION_WAIT)) private->drag_status = GDK_DRAG_STATUS_DRAG; event->dnd.type = GDK_DRAG_STATUS; event->dnd.send_event = FALSE; event->dnd.context = context; g_object_ref (context); event->dnd.time = timestamp; if ((flags & 0x00f0) >> 4 == XmDROP_SITE_VALID) { switch (flags & 0x000f) { case XmDROP_NOOP: context->action = 0; break; case XmDROP_MOVE: context->action = GDK_ACTION_MOVE; break; case XmDROP_COPY: context->action = GDK_ACTION_COPY; break; case XmDROP_LINK: context->action = GDK_ACTION_LINK; break; } } else context->action = 0; return GDK_FILTER_TRANSLATE; } return GDK_FILTER_REMOVE; } static GdkFilterReturn motif_dnd_filter (GdkXEvent *xev, GdkEvent *event, gpointer data) { XEvent *xevent = (XEvent *)xev; guint8 reason; guint16 flags; guint32 timestamp; guint32 source_window; Atom atom; gint16 x_root, y_root; gboolean is_reply; if (!event->any.window || gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN) return GDK_FILTER_CONTINUE; /* Not for us */ /* First read some fields common to all Motif DND messages */ reason = MOTIF_UNPACK_BYTE (xevent, 0); flags = MOTIF_UNPACK_SHORT (xevent, 1); timestamp = MOTIF_UNPACK_LONG (xevent, 1); is_reply = ((reason & 0x80) != 0); switch (reason & 0x7f) { case XmTOP_LEVEL_ENTER: source_window = MOTIF_UNPACK_LONG (xevent, 2); atom = MOTIF_UNPACK_LONG (xevent, 3); return motif_top_level_enter (event, flags, timestamp, source_window, atom); case XmTOP_LEVEL_LEAVE: return motif_top_level_leave (event, flags, timestamp); case XmDRAG_MOTION: x_root = MOTIF_UNPACK_SHORT (xevent, 4); y_root = MOTIF_UNPACK_SHORT (xevent, 5); if (!is_reply) return motif_motion (event, flags, timestamp, x_root, y_root); else return motif_drag_status (event, flags, timestamp); case XmDROP_SITE_ENTER: return motif_drag_status (event, flags, timestamp); case XmDROP_SITE_LEAVE: return motif_drag_status (event, XmNO_DROP_SITE << 8 | XmDROP_NOOP, timestamp); case XmDROP_START: x_root = MOTIF_UNPACK_SHORT (xevent, 4); y_root = MOTIF_UNPACK_SHORT (xevent, 5); atom = MOTIF_UNPACK_LONG (xevent, 3); source_window = MOTIF_UNPACK_LONG (xevent, 4); if (!is_reply) return motif_drop_start (event, flags, timestamp, source_window, atom, x_root, y_root); break; case XmOPERATION_CHANGED: if (!is_reply) return motif_operation_changed (event, flags, timestamp); else return motif_drag_status (event, flags, timestamp); break; /* To the best of my knowledge, these next two messages are * not part of the protocol, though they are defined in * the header files. */ case XmDROP_FINISH: case XmDRAG_DROP_FINISH: break; } return GDK_FILTER_REMOVE; } /************************************************************* ***************************** XDND ************************** *************************************************************/ /* Utility functions */ static struct { gchar *name; GdkAtom atom; GdkDragAction action; } xdnd_actions_table[] = { { "XdndActionCopy", None, GDK_ACTION_COPY }, { "XdndActionMove", None, GDK_ACTION_MOVE }, { "XdndActionLink", None, GDK_ACTION_LINK }, { "XdndActionAsk", None, GDK_ACTION_ASK }, { "XdndActionPrivate", None, GDK_ACTION_COPY }, }; static const gint xdnd_n_actions = sizeof(xdnd_actions_table) / sizeof(xdnd_actions_table[0]); static gboolean xdnd_actions_initialized = FALSE; static void xdnd_initialize_actions (void) { gint i; xdnd_actions_initialized = TRUE; for (i=0; i < xdnd_n_actions; i++) xdnd_actions_table[i].atom = gdk_atom_intern (xdnd_actions_table[i].name, FALSE); } static GdkDragAction xdnd_action_from_atom (GdkDisplay *display, Atom xatom) { GdkAtom atom = gdk_x11_xatom_to_atom_for_display (display, xatom); gint i; if (!xdnd_actions_initialized) xdnd_initialize_actions(); for (i=0; ixclient.data.l[0]; guint32 flags = xevent->xclient.data.l[1]; Atom action = xevent->xclient.data.l[4]; GdkDragContext *context; if (!event->any.window || gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN) return GDK_FILTER_CONTINUE; /* Not for us */ GDK_NOTE (DND, g_message ("XdndStatus: dest_window: %#x action: %ld", dest_window, action)); display = gdk_drawable_get_display (event->any.window); context = gdk_drag_context_find (display, TRUE, xevent->xclient.window, dest_window); if (context) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); if (private->drag_status == GDK_DRAG_STATUS_MOTION_WAIT) private->drag_status = GDK_DRAG_STATUS_DRAG; event->dnd.send_event = FALSE; event->dnd.type = GDK_DRAG_STATUS; event->dnd.context = context; g_object_ref (context); event->dnd.time = GDK_CURRENT_TIME; /* FIXME? */ if (!(action != 0) != !(flags & 1)) { GDK_NOTE (DND, g_warning ("Received status event with flags not corresponding to action!\n")); action = 0; } context->action = xdnd_action_from_atom (display, action); return GDK_FILTER_TRANSLATE; } return GDK_FILTER_REMOVE; } static GdkFilterReturn xdnd_finished_filter (GdkXEvent *xev, GdkEvent *event, gpointer data) { GdkDisplay *display; XEvent *xevent = (XEvent *)xev; guint32 dest_window = xevent->xclient.data.l[0]; GdkDragContext *context; if (!event->any.window || gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN) return GDK_FILTER_CONTINUE; /* Not for us */ GDK_NOTE (DND, g_message ("XdndFinished: dest_window: %#x", dest_window)); display = gdk_drawable_get_display (event->any.window); context = gdk_drag_context_find (display, TRUE, xevent->xclient.window, dest_window); if (context) { event->dnd.type = GDK_DROP_FINISHED; event->dnd.context = context; g_object_ref (context); return GDK_FILTER_TRANSLATE; } return GDK_FILTER_REMOVE; } static void xdnd_set_targets (GdkDragContext *context) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); Atom *atomlist; GList *tmp_list = context->targets; gint i; gint n_atoms = g_list_length (context->targets); GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); atomlist = g_new (Atom, n_atoms); i = 0; while (tmp_list) { atomlist[i] = gdk_x11_atom_to_xatom_for_display (display, GDK_POINTER_TO_ATOM (tmp_list->data)); tmp_list = tmp_list->next; i++; } XChangeProperty (GDK_DRAWABLE_XDISPLAY (context->source_window), GDK_DRAWABLE_XID (context->source_window), gdk_x11_get_xatom_by_name_for_display (display, "XdndTypeList"), XA_ATOM, 32, PropModeReplace, (guchar *)atomlist, n_atoms); g_free (atomlist); private->xdnd_targets_set = 1; } static void xdnd_set_actions (GdkDragContext *context) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); Atom *atomlist; gint i; gint n_atoms; guint actions; GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); if (!xdnd_actions_initialized) xdnd_initialize_actions(); actions = context->actions; n_atoms = 0; for (i=0; iactions; n_atoms = 0; for (i=0; isource_window), GDK_DRAWABLE_XID (context->source_window), gdk_x11_get_xatom_by_name_for_display (display, "XdndActionList"), XA_ATOM, 32, PropModeReplace, (guchar *)atomlist, n_atoms); g_free (atomlist); private->xdnd_actions_set = 1; private->xdnd_actions = context->actions; } /************************************************************* * xdnd_send_xevent: * Like gdk_send_event, but if the target is the root * window, sets an event mask of ButtonPressMask, otherwise * an event mask of 0. * arguments: * * results: *************************************************************/ static gboolean xdnd_send_xevent (GdkDisplay *display, Window window, gboolean propagate, XEvent *event_send) { if (_gdk_x11_display_is_root_window (display, window)) return _gdk_send_xevent (display, window, propagate, ButtonPressMask, event_send); else return _gdk_send_xevent (display, window, propagate, 0, event_send); } static void xdnd_send_enter (GdkDragContext *context) { XEvent xev; GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->dest_window); 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 = private->drop_xid ? private->drop_xid : GDK_DRAWABLE_XID (context->dest_window); xev.xclient.data.l[0] = GDK_DRAWABLE_XID (context->source_window); xev.xclient.data.l[1] = (3 << 24); /* version */ xev.xclient.data.l[2] = 0; xev.xclient.data.l[3] = 0; xev.xclient.data.l[4] = 0; if (!private->xdnd_selection) private->xdnd_selection = gdk_x11_get_xatom_by_name_for_display (display, "XdndSelection"); if (g_list_length (context->targets) > 3) { if (!private->xdnd_targets_set) xdnd_set_targets (context); xev.xclient.data.l[1] |= 1; } else { GList *tmp_list = context->targets; gint i = 2; while (tmp_list) { xev.xclient.data.l[i] = gdk_x11_atom_to_xatom_for_display (display, GDK_POINTER_TO_ATOM (tmp_list->data)); tmp_list = tmp_list->next; i++; } } if (!xdnd_send_xevent (display, GDK_DRAWABLE_XID (context->dest_window), FALSE, &xev)) { GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->dest_window))); g_object_unref (context->dest_window); context->dest_window = NULL; } } static void xdnd_send_leave (GdkDragContext *context) { GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); XEvent xev; GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); 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 = private->drop_xid ? private->drop_xid : GDK_DRAWABLE_XID (context->dest_window); xev.xclient.data.l[0] = GDK_DRAWABLE_XID (context->source_window); xev.xclient.data.l[1] = 0; xev.xclient.data.l[2] = 0; xev.xclient.data.l[3] = 0; xev.xclient.data.l[4] = 0; if (!xdnd_send_xevent (display, GDK_DRAWABLE_XID (context->dest_window), FALSE, &xev)) { GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->dest_window))); g_object_unref (context->dest_window); context->dest_window = NULL; } } static void xdnd_send_drop (GdkDragContext *context, guint32 time) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); 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 = private->drop_xid ? private->drop_xid : GDK_DRAWABLE_XID (context->dest_window); xev.xclient.data.l[0] = GDK_DRAWABLE_XID (context->source_window); xev.xclient.data.l[1] = 0; xev.xclient.data.l[2] = time; xev.xclient.data.l[3] = 0; xev.xclient.data.l[4] = 0; if (!xdnd_send_xevent (display, GDK_DRAWABLE_XID (context->dest_window), FALSE, &xev)) { GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->dest_window))); g_object_unref (context->dest_window); context->dest_window = NULL; } } static void xdnd_send_motion (GdkDragContext *context, gint x_root, gint y_root, GdkDragAction action, guint32 time) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); 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 = private->drop_xid ? private->drop_xid : GDK_DRAWABLE_XID (context->dest_window); xev.xclient.data.l[0] = GDK_DRAWABLE_XID (context->source_window); 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); if (!xdnd_send_xevent (display, GDK_DRAWABLE_XID (context->dest_window), FALSE, &xev)) { GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->dest_window))); g_object_unref (context->dest_window); context->dest_window = NULL; } private->drag_status = GDK_DRAG_STATUS_MOTION_WAIT; } static guint32 xdnd_check_dest (GdkDisplay *display, Window win) { gboolean retval = FALSE; Atom type = None; int format; unsigned long nitems, after; 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_error_trap_push (); if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), win, xdnd_proxy_atom, 0, 1, False, AnyPropertyType, &type, &format, &nitems, &after, (guchar **)&proxy_data) == Success) { if (type != None) { if ((format == 32) && (nitems == 1)) { proxy = *proxy_data; } else GDK_NOTE (DND, g_warning ("Invalid XdndOwner " "property on window %ld\n", win)); XFree (proxy_data); } if ((XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), proxy ? proxy : win, xdnd_aware_atom, 0, 1, False, AnyPropertyType, &type, &format, &nitems, &after, (guchar **)&version) == Success) && type != None) { if ((format == 32) && (nitems == 1)) { if (*version >= 3) retval = TRUE; } else GDK_NOTE (DND, g_warning ("Invalid XdndAware property on window %ld\n", win)); XFree (version); } } gdk_error_trap_pop (); return retval ? (proxy ? proxy : win) : None; } /* Target side */ static void xdnd_read_actions (GdkDragContext *context) { GdkDisplay *display = GDK_WINDOW_DISPLAY (context->source_window); Atom type; int format; gulong nitems, after; Atom *data; gint i; /* Get the XdndActionList, if set */ gdk_error_trap_push (); if (XGetWindowProperty (GDK_DRAWABLE_XDISPLAY (context->source_window), GDK_DRAWABLE_XID (context->source_window), gdk_x11_get_xatom_by_name_for_display (display, "XdndActionList"), 0, 65536, False, XA_ATOM, &type, &format, &nitems, &after, (guchar **)&data) == Success && type == XA_ATOM) { context->actions = 0; for (i=0; iactions |= xdnd_action_from_atom (display, data[i]); (PRIVATE_DATA (context))->xdnd_have_actions = TRUE; #ifdef G_ENABLE_DEBUG if (_gdk_debug_flags & GDK_DEBUG_DND) { GString *action_str = g_string_new (NULL); if (context->actions & GDK_ACTION_MOVE) g_string_append(action_str, "MOVE "); if (context->actions & GDK_ACTION_COPY) g_string_append(action_str, "COPY "); if (context->actions & GDK_ACTION_LINK) g_string_append(action_str, "LINK "); if (context->actions & GDK_ACTION_ASK) g_string_append(action_str, "ASK "); g_message("Xdnd actions = %s", action_str->str); g_string_free (action_str, TRUE); } #endif /* G_ENABLE_DEBUG */ XFree(data); } gdk_error_trap_pop (); } /* We have to make sure that the XdndActionList we keep internally * is up to date with the XdndActionList on the source window * because we get no notification, because Xdnd wasn't meant * to continually send actions. So we select on PropertyChangeMask * and add this filter. */ static GdkFilterReturn xdnd_source_window_filter (GdkXEvent *xev, GdkEvent *event, gpointer cb_data) { XEvent *xevent = (XEvent *)xev; GdkDragContext *context = cb_data; GdkDisplay *display = GDK_WINDOW_DISPLAY(event->any.window); if ((xevent->xany.type == PropertyNotify) && (xevent->xproperty.atom == gdk_x11_get_xatom_by_name_for_display (display, "XdndActionList"))) { xdnd_read_actions (context); return GDK_FILTER_REMOVE; } return GDK_FILTER_CONTINUE; } static void xdnd_manage_source_filter (GdkDragContext *context, GdkWindow *window, gboolean add_filter) { gdk_error_trap_push (); if (!GDK_WINDOW_DESTROYED (window)) { if (add_filter) { gdk_window_set_events (window, gdk_window_get_events (window) | GDK_PROPERTY_CHANGE_MASK); gdk_window_add_filter (window, xdnd_source_window_filter, context); } else { gdk_window_remove_filter (window, xdnd_source_window_filter, context); /* Should we remove the GDK_PROPERTY_NOTIFY mask? * but we might want it for other reasons. (Like * INCR selection transactions). */ } } gdk_display_sync (gdk_drawable_get_display (window)); gdk_error_trap_pop (); } static GdkFilterReturn xdnd_enter_filter (GdkXEvent *xev, GdkEvent *event, gpointer cb_data) { GdkDisplay *display; GdkDisplayX11 *display_x11; XEvent *xevent = (XEvent *)xev; GdkDragContext *new_context; gint i; Atom type; int format; gulong nitems, after; Atom *data; guint32 source_window; gboolean get_types; gint version; if (!event->any.window || gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN) return GDK_FILTER_CONTINUE; /* Not for us */ source_window = xevent->xclient.data.l[0]; get_types = ((xevent->xclient.data.l[1] & 1) != 0); version = (xevent->xclient.data.l[1] & 0xff000000) >> 24; display = GDK_DRAWABLE_DISPLAY (event->any.window); display_x11 = GDK_DISPLAY_X11 (display); GDK_NOTE (DND, g_message ("XdndEnter: source_window: %#x, version: %#x", source_window, version)); if (version != 3) { /* Old source ignore */ GDK_NOTE (DND, g_message ("Ignored old XdndEnter message")); return GDK_FILTER_REMOVE; } if (display_x11->current_dest_drag != NULL) { g_object_unref (display_x11->current_dest_drag); display_x11->current_dest_drag = NULL; } new_context = gdk_drag_context_new (); new_context->protocol = GDK_DRAG_PROTO_XDND; new_context->is_source = FALSE; new_context->source_window = gdk_window_lookup_for_display (display, source_window); if (new_context->source_window) g_object_ref (new_context->source_window); else { new_context->source_window = gdk_window_foreign_new_for_display (display, source_window); if (!new_context->source_window) { g_object_unref (new_context); return GDK_FILTER_REMOVE; } } new_context->dest_window = event->any.window; g_object_ref (new_context->dest_window); new_context->targets = NULL; if (get_types) { gdk_error_trap_push (); XGetWindowProperty (GDK_DRAWABLE_XDISPLAY (event->any.window), source_window, gdk_x11_get_xatom_by_name_for_display (display, "XdndTypeList"), 0, 65536, False, XA_ATOM, &type, &format, &nitems, &after, (guchar **)&data); if (gdk_error_trap_pop () || (format != 32) || (type != XA_ATOM)) { g_object_unref (new_context); return GDK_FILTER_REMOVE; } for (i=0; itargets = g_list_append (new_context->targets, GDK_ATOM_TO_POINTER (gdk_x11_xatom_to_atom_for_display (display, data[i]))); XFree(data); } else { for (i=0; i<3; i++) if (xevent->xclient.data.l[2+i]) new_context->targets = g_list_append (new_context->targets, GDK_ATOM_TO_POINTER (gdk_x11_xatom_to_atom_for_display (display, xevent->xclient.data.l[2+i]))); } #ifdef G_ENABLE_DEBUG if (_gdk_debug_flags & GDK_DEBUG_DND) print_target_list (new_context->targets); #endif /* G_ENABLE_DEBUG */ xdnd_manage_source_filter (new_context, new_context->source_window, TRUE); xdnd_read_actions (new_context); event->dnd.type = GDK_DRAG_ENTER; event->dnd.context = new_context; g_object_ref (new_context); display_x11->current_dest_drag = new_context; (PRIVATE_DATA (new_context))->xdnd_selection = gdk_x11_get_xatom_by_name_for_display (display, "XdndSelection"); return GDK_FILTER_TRANSLATE; } static GdkFilterReturn xdnd_leave_filter (GdkXEvent *xev, GdkEvent *event, gpointer data) { XEvent *xevent = (XEvent *)xev; guint32 source_window = xevent->xclient.data.l[0]; GdkDisplayX11 *display_x11; if (!event->any.window || gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN) return GDK_FILTER_CONTINUE; /* Not for us */ GDK_NOTE (DND, g_message ("XdndLeave: source_window: %#x", source_window)); display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window)); if ((display_x11->current_dest_drag != NULL) && (display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_XDND) && (GDK_DRAWABLE_XID (display_x11->current_dest_drag->source_window) == source_window)) { event->dnd.type = GDK_DRAG_LEAVE; /* Pass ownership of context to the event */ event->dnd.context = display_x11->current_dest_drag; display_x11->current_dest_drag = NULL; return GDK_FILTER_TRANSLATE; } else return GDK_FILTER_REMOVE; } static GdkFilterReturn xdnd_position_filter (GdkXEvent *xev, GdkEvent *event, gpointer data) { XEvent *xevent = (XEvent *)xev; guint32 source_window = xevent->xclient.data.l[0]; gint16 x_root = xevent->xclient.data.l[2] >> 16; gint16 y_root = xevent->xclient.data.l[2] & 0xffff; guint32 time = xevent->xclient.data.l[3]; Atom action = xevent->xclient.data.l[4]; GdkDisplay *display; GdkDisplayX11 *display_x11; if (!event->any.window || gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN) return GDK_FILTER_CONTINUE; /* Not for us */ GDK_NOTE (DND, g_message ("XdndPosition: source_window: %#x position: (%d, %d) time: %d action: %ld", source_window, x_root, y_root, time, action)); display = GDK_DRAWABLE_DISPLAY (event->any.window); display_x11 = GDK_DISPLAY_X11 (display); if ((display_x11->current_dest_drag != NULL) && (display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_XDND) && (GDK_DRAWABLE_XID (display_x11->current_dest_drag->source_window) == source_window)) { event->dnd.type = GDK_DRAG_MOTION; event->dnd.context = display_x11->current_dest_drag; g_object_ref (display_x11->current_dest_drag); event->dnd.time = time; display_x11->current_dest_drag->suggested_action = xdnd_action_from_atom (display, action); if (!(PRIVATE_DATA (display_x11->current_dest_drag))->xdnd_have_actions) display_x11->current_dest_drag->actions = display_x11->current_dest_drag->suggested_action; event->dnd.x_root = x_root; event->dnd.y_root = y_root; (PRIVATE_DATA (display_x11->current_dest_drag))->last_x = x_root; (PRIVATE_DATA (display_x11->current_dest_drag))->last_y = y_root; return GDK_FILTER_TRANSLATE; } return GDK_FILTER_REMOVE; } static GdkFilterReturn xdnd_drop_filter (GdkXEvent *xev, GdkEvent *event, gpointer data) { XEvent *xevent = (XEvent *)xev; guint32 source_window = xevent->xclient.data.l[0]; guint32 time = xevent->xclient.data.l[2]; GdkDisplayX11 *display_x11; if (!event->any.window || gdk_window_get_window_type (event->any.window) == GDK_WINDOW_FOREIGN) return GDK_FILTER_CONTINUE; /* Not for us */ GDK_NOTE (DND, g_message ("XdndDrop: source_window: %#x time: %d", source_window, time)); display_x11 = GDK_DISPLAY_X11 (GDK_DRAWABLE_DISPLAY (event->any.window)); if ((display_x11->current_dest_drag != NULL) && (display_x11->current_dest_drag->protocol == GDK_DRAG_PROTO_XDND) && (GDK_DRAWABLE_XID (display_x11->current_dest_drag->source_window) == source_window)) { GdkDragContextPrivateX11 *private; private = PRIVATE_DATA (display_x11->current_dest_drag); event->dnd.type = GDK_DROP_START; event->dnd.context = display_x11->current_dest_drag; g_object_ref (display_x11->current_dest_drag); event->dnd.time = time; event->dnd.x_root = private->last_x; event->dnd.y_root = private->last_y; return GDK_FILTER_TRANSLATE; } return GDK_FILTER_REMOVE; } /************************************************************* ************************** Public API *********************** *************************************************************/ void _gdk_dnd_init (GdkDisplay *display) { init_byte_order (); gdk_display_add_client_message_filter ( display, gdk_atom_intern ("_MOTIF_DRAG_AND_DROP_MESSAGE", FALSE), motif_dnd_filter, NULL); gdk_display_add_client_message_filter ( display, gdk_atom_intern ("XdndEnter", FALSE), xdnd_enter_filter, NULL); gdk_display_add_client_message_filter ( display, gdk_atom_intern ("XdndLeave", FALSE), xdnd_leave_filter, NULL); gdk_display_add_client_message_filter ( display, gdk_atom_intern ("XdndPosition", FALSE), xdnd_position_filter, NULL); gdk_display_add_client_message_filter ( display, gdk_atom_intern ("XdndStatus", FALSE), xdnd_status_filter, NULL); gdk_display_add_client_message_filter ( display, gdk_atom_intern ("XdndFinished", FALSE), xdnd_finished_filter, NULL); gdk_display_add_client_message_filter ( display, gdk_atom_intern ("XdndDrop", FALSE), xdnd_drop_filter, NULL); } /* Source side */ static void gdk_drag_do_leave (GdkDragContext *context, guint32 time) { if (context->dest_window) { switch (context->protocol) { case GDK_DRAG_PROTO_MOTIF: motif_send_leave (context, time); break; case GDK_DRAG_PROTO_XDND: xdnd_send_leave (context); break; case GDK_DRAG_PROTO_ROOTWIN: case GDK_DRAG_PROTO_NONE: default: break; } g_object_unref (context->dest_window); context->dest_window = NULL; } } GdkDragContext * gdk_drag_begin (GdkWindow *window, GList *targets) { GdkDragContext *new_context; g_return_val_if_fail (window != NULL, NULL); new_context = gdk_drag_context_new (); new_context->is_source = TRUE; new_context->source_window = window; g_object_ref (window); new_context->targets = g_list_copy (targets); new_context->actions = 0; return new_context; } /** * gdk_drag_get_protocol_for_display: * @display: the #GdkDisplay where the destination window resides * @xid: the X id of the destination window. * @protocol: location where the supported DND protocol is returned. * @returns: the X id of the window where the drop should happen. This * may be @xid or the X id of a proxy window, or None if @xid doesn't * support Drag and Drop. * * Finds out the DND protocol supported by a window. */ guint32 gdk_drag_get_protocol_for_display (GdkDisplay *display, guint32 xid, GdkDragProtocol *protocol) { guint32 retval; g_return_val_if_fail (GDK_IS_DISPLAY (display), TRUE); if ((retval = xdnd_check_dest (display, xid))) { *protocol = GDK_DRAG_PROTO_XDND; GDK_NOTE (DND, g_message ("Entering dnd window %#x\n", xid)); return retval; } else if ((retval = motif_check_dest (display, xid))) { *protocol = GDK_DRAG_PROTO_MOTIF; GDK_NOTE (DND, g_message ("Entering motif window %#x\n", xid)); return retval; } else { /* Check if this is a root window */ gboolean rootwin = FALSE; Atom type = None; int format; unsigned long nitems, after; unsigned char *data; if (_gdk_x11_display_is_root_window (display, (Window) xid)) rootwin = TRUE; gdk_error_trap_push (); if (!rootwin) { if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), xid, gdk_x11_get_xatom_by_name_for_display (display, "ENLIGHTENMENT_DESKTOP"), 0, 0, False, AnyPropertyType, &type, &format, &nitems, &after, &data) == Success && type != None) { XFree (data); rootwin = TRUE; } } /* Until I find out what window manager the next one is for, * I'm leaving it commented out. It's supported in the * xscreensaver sources, though. */ #if 0 if (!rootwin) { if (XGetWindowProperty (gdk_display, win, gdk_x11_get_xatom_by_name ("__SWM_VROOT"), 0, 0, False, AnyPropertyType, &type, &format, &nitems, &data) && type != None) rootwin = TRUE; } #endif gdk_error_trap_pop (); if (rootwin) { *protocol = GDK_DRAG_PROTO_ROOTWIN; return xid; } } *protocol = GDK_DRAG_PROTO_NONE; return None; } static GdkWindowCache * drag_context_find_window_cache (GdkDragContext *context, GdkScreen *screen) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); GSList *tmp_list; GdkWindowCache *cache; for (tmp_list = private->window_caches; tmp_list; tmp_list = tmp_list->next) { cache = tmp_list->data; if (cache->screen == screen) return cache; } cache = gdk_window_cache_new (screen); private->window_caches = g_slist_prepend (private->window_caches, cache); return cache; } void gdk_drag_find_window_for_screen (GdkDragContext *context, GdkWindow *drag_window, GdkScreen *screen, gint x_root, gint y_root, GdkWindow **dest_window, GdkDragProtocol *protocol) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); GdkWindowCache *window_cache; GdkDisplay *display; Window dest; g_return_if_fail (context != NULL); display = GDK_WINDOW_DISPLAY (context->source_window); window_cache = drag_context_find_window_cache (context, screen); dest = get_client_window_at_coords (window_cache, drag_window ? GDK_DRAWABLE_XID (drag_window) : None, x_root, y_root); if (private->dest_xid != dest) { Window recipient; private->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_window, * protocol, and the XID of the unproxied window. The first * two are passed explicitely, the third implicitly through * protocol->dest_xid. */ if ((recipient = gdk_drag_get_protocol_for_display (display, dest, protocol))) { *dest_window = gdk_window_lookup_for_display (display, recipient); if (*dest_window) g_object_ref (*dest_window); else *dest_window = gdk_window_foreign_new_for_display (display, recipient); } else *dest_window = NULL; } else { *dest_window = context->dest_window; if (*dest_window) g_object_ref (*dest_window); *protocol = context->protocol; } } gboolean gdk_drag_motion (GdkDragContext *context, GdkWindow *dest_window, GdkDragProtocol protocol, gint x_root, gint y_root, GdkDragAction suggested_action, GdkDragAction possible_actions, guint32 time) { GdkDragContextPrivateX11 *private = PRIVATE_DATA (context); g_return_val_if_fail (context != NULL, FALSE); /* When we have a Xdnd target, make sure our XdndActionList * matches the current actions; */ private->old_actions = context->actions; context->actions = possible_actions; if ((protocol == GDK_DRAG_PROTO_XDND) && (!private->xdnd_actions_set || private->xdnd_actions != possible_actions)) xdnd_set_actions (context); if (context->dest_window != dest_window) { GdkEvent temp_event; /* Send a leave to the last destination */ gdk_drag_do_leave (context, time); private->drag_status = GDK_DRAG_STATUS_DRAG; /* Check if new destination accepts drags, and which protocol */ if (dest_window) { context->dest_window = dest_window; private->drop_xid = private->dest_xid; g_object_ref (context->dest_window); context->protocol = protocol; switch (protocol) { case GDK_DRAG_PROTO_MOTIF: motif_send_enter (context, time); break; case GDK_DRAG_PROTO_XDND: xdnd_send_enter (context); break; case GDK_DRAG_PROTO_ROOTWIN: case GDK_DRAG_PROTO_NONE: default: break; } private->old_action = suggested_action; context->suggested_action = suggested_action; private->old_actions = possible_actions; } else { context->dest_window = NULL; private->drop_xid = None; context->action = 0; } /* Push a status event, to let the client know that * the drag changed */ temp_event.dnd.type = GDK_DRAG_STATUS; temp_event.dnd.window = context->source_window; /* We use this to signal a synthetic status. Perhaps * we should use an extra field... */ temp_event.dnd.send_event = TRUE; temp_event.dnd.context = context; temp_event.dnd.time = time; gdk_event_put (&temp_event); } else { private->old_action = context->suggested_action; context->suggested_action = suggested_action; } /* Send a drag-motion event */ private->last_x = x_root; private->last_y = y_root; if (context->dest_window) { if (private->drag_status == GDK_DRAG_STATUS_DRAG) { switch (context->protocol) { case GDK_DRAG_PROTO_MOTIF: motif_send_motion (context, x_root, y_root, suggested_action, time); break; case GDK_DRAG_PROTO_XDND: xdnd_send_motion (context, x_root, y_root, suggested_action, time); break; case GDK_DRAG_PROTO_ROOTWIN: { GdkEvent temp_event; if (g_list_find (context->targets, GDK_ATOM_TO_POINTER (gdk_atom_intern ("application/x-rootwin-drop", FALSE)))) context->action = context->suggested_action; else context->action = 0; temp_event.dnd.type = GDK_DRAG_STATUS; temp_event.dnd.window = context->source_window; temp_event.dnd.send_event = FALSE; temp_event.dnd.context = context; temp_event.dnd.time = time; gdk_event_put (&temp_event); } break; case GDK_DRAG_PROTO_NONE: g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_motion()"); break; default: break; } } else return TRUE; } return FALSE; } void gdk_drag_drop (GdkDragContext *context, guint32 time) { g_return_if_fail (context != NULL); if (context->dest_window) { switch (context->protocol) { case GDK_DRAG_PROTO_MOTIF: motif_send_leave (context, time); motif_send_drop (context, time); break; case GDK_DRAG_PROTO_XDND: xdnd_send_drop (context, 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: break; } } } void gdk_drag_abort (GdkDragContext *context, guint32 time) { g_return_if_fail (context != NULL); gdk_drag_do_leave (context, time); } /* Destination side */ void gdk_drag_status (GdkDragContext *context, GdkDragAction action, guint32 time) { GdkDragContextPrivateX11 *private; XEvent xev; GdkDisplay *display; g_return_if_fail (context != NULL); private = PRIVATE_DATA (context); display = GDK_DRAWABLE_DISPLAY (context->source_window); context->action = action; if (context->protocol == GDK_DRAG_PROTO_MOTIF) { xev.xclient.type = ClientMessage; xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_AND_DROP_MESSAGE"); xev.xclient.format = 8; xev.xclient.window = GDK_DRAWABLE_XID (context->source_window); if (private->drag_status == GDK_DRAG_STATUS_ACTION_WAIT) { MOTIF_XCLIENT_BYTE (&xev, 0) = XmOPERATION_CHANGED | 0x80; } else { if ((action != 0) != (private->old_action != 0)) { if (action != 0) MOTIF_XCLIENT_BYTE (&xev, 0) = XmDROP_SITE_ENTER | 0x80; else MOTIF_XCLIENT_BYTE (&xev, 0) = XmDROP_SITE_LEAVE | 0x80; } else MOTIF_XCLIENT_BYTE (&xev, 0) = XmDRAG_MOTION | 0x80; } MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order; switch (action) { case GDK_ACTION_MOVE: MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_MOVE; break; case GDK_ACTION_COPY: MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_COPY; break; case GDK_ACTION_LINK: MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_LINK; break; default: MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_NOOP; break; } if (action) MOTIF_XCLIENT_SHORT (&xev, 1) |= (XmDROP_SITE_VALID << 4); else MOTIF_XCLIENT_SHORT (&xev, 1) |= (XmNO_DROP_SITE << 4); MOTIF_XCLIENT_LONG (&xev, 1) = time; MOTIF_XCLIENT_SHORT (&xev, 4) = private->last_x; MOTIF_XCLIENT_SHORT (&xev, 5) = private->last_y; if (!_gdk_send_xevent (display, GDK_DRAWABLE_XID (context->source_window), FALSE, 0, &xev)) GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->source_window))); } else if (context->protocol == GDK_DRAG_PROTO_XDND) { xev.xclient.type = ClientMessage; xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndStatus"); xev.xclient.format = 32; xev.xclient.window = GDK_DRAWABLE_XID (context->source_window); xev.xclient.data.l[0] = GDK_DRAWABLE_XID (context->dest_window); xev.xclient.data.l[1] = (action != 0) ? (2 | 1) : 0; xev.xclient.data.l[2] = 0; xev.xclient.data.l[3] = 0; xev.xclient.data.l[4] = xdnd_action_to_atom (display, action); if (!xdnd_send_xevent (display, GDK_DRAWABLE_XID (context->source_window), FALSE, &xev)) GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->source_window))); } private->old_action = action; } void gdk_drop_reply (GdkDragContext *context, gboolean ok, guint32 time) { GdkDragContextPrivateX11 *private; g_return_if_fail (context != NULL); private = PRIVATE_DATA (context); if (context->protocol == GDK_DRAG_PROTO_MOTIF) { GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); XEvent xev; xev.xclient.type = ClientMessage; xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_AND_DROP_MESSAGE"); xev.xclient.format = 8; MOTIF_XCLIENT_BYTE (&xev, 0) = XmDROP_START | 0x80; MOTIF_XCLIENT_BYTE (&xev, 1) = local_byte_order; if (ok) MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_COPY | (XmDROP_SITE_VALID << 4) | (XmDROP_NOOP << 8) | (XmDROP << 12); else MOTIF_XCLIENT_SHORT (&xev, 1) = XmDROP_NOOP | (XmNO_DROP_SITE << 4) | (XmDROP_NOOP << 8) | (XmDROP_CANCEL << 12); MOTIF_XCLIENT_SHORT (&xev, 2) = private->last_x; MOTIF_XCLIENT_SHORT (&xev, 3) = private->last_y; _gdk_send_xevent (display, GDK_DRAWABLE_XID (context->source_window), FALSE, 0, &xev); } } void gdk_drop_finish (GdkDragContext *context, gboolean success, guint32 time) { g_return_if_fail (context != NULL); if (context->protocol == GDK_DRAG_PROTO_XDND) { GdkDisplay *display = GDK_DRAWABLE_DISPLAY (context->source_window); XEvent xev; xev.xclient.type = ClientMessage; xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display (display, "XdndFinished"); xev.xclient.format = 32; xev.xclient.window = GDK_DRAWABLE_XID (context->source_window); xev.xclient.data.l[0] = GDK_DRAWABLE_XID (context->dest_window); xev.xclient.data.l[1] = 0; xev.xclient.data.l[2] = 0; xev.xclient.data.l[3] = 0; xev.xclient.data.l[4] = 0; if (!xdnd_send_xevent (display, GDK_DRAWABLE_XID (context->source_window), FALSE, &xev)) GDK_NOTE (DND, g_message ("Send event to %lx failed", GDK_DRAWABLE_XID (context->source_window))); } } void gdk_window_register_dnd (GdkWindow *window) { static gulong xdnd_version = 3; MotifDragReceiverInfo info; Atom motif_drag_receiver_info_atom; GdkDisplay *display = gdk_drawable_get_display (window); g_return_if_fail (window != NULL); if (GPOINTER_TO_INT (g_object_get_data (G_OBJECT (window), "gdk-dnd-registered"))) return; else g_object_set_data (G_OBJECT (window), "gdk-dnd-registered", GINT_TO_POINTER (TRUE)); /* Set Motif drag receiver information property */ motif_drag_receiver_info_atom = gdk_x11_get_xatom_by_name_for_display (display, "_MOTIF_DRAG_RECEIVER_INFO"); info.byte_order = local_byte_order; info.protocol_version = 0; info.protocol_style = XmDRAG_DYNAMIC; info.proxy_window = None; info.num_drop_sites = 0; info.total_size = sizeof(info); XChangeProperty (GDK_DISPLAY_XDISPLAY (display), GDK_DRAWABLE_XID (window), motif_drag_receiver_info_atom, motif_drag_receiver_info_atom, 8, PropModeReplace, (guchar *)&info, sizeof (info)); /* Set XdndAware */ /* The property needs to be of type XA_ATOM, not XA_INTEGER. Blech */ XChangeProperty (GDK_DISPLAY_XDISPLAY (display), GDK_DRAWABLE_XID (window), gdk_x11_get_xatom_by_name_for_display (display, "XdndAware"), XA_ATOM, 32, PropModeReplace, (guchar *)&xdnd_version, 1); } /************************************************************* * gdk_drag_get_selection: * Returns the selection atom for the current source window * arguments: * * results: *************************************************************/ GdkAtom gdk_drag_get_selection (GdkDragContext *context) { g_return_val_if_fail (context != NULL, GDK_NONE); if (context->protocol == GDK_DRAG_PROTO_MOTIF) return gdk_x11_xatom_to_atom_for_display (GDK_DRAWABLE_DISPLAY (context->source_window), (PRIVATE_DATA (context))->motif_selection); else if (context->protocol == GDK_DRAG_PROTO_XDND) return gdk_x11_xatom_to_atom_for_display (GDK_DRAWABLE_DISPLAY (context->source_window), (PRIVATE_DATA (context))->xdnd_selection); else return GDK_NONE; }