/* GDK - The GIMP Drawing Kit * Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald * Copyright (C) 1998-1999 Tor Lillqvist * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library 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 1997-1999. 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 #define INITGUID #include "gdkdnd.h" #include "gdkproperty.h" #include "gdkprivate.h" #include "gdkx.h" #ifdef OLE2_DND #include #endif #ifdef _MSC_VER /* These aren't in mingw32 */ #include #include #endif #include typedef struct _GdkDragContextPrivate GdkDragContextPrivate; typedef enum { GDK_DRAG_STATUS_DRAG, GDK_DRAG_STATUS_MOTION_WAIT, GDK_DRAG_STATUS_ACTION_WAIT, GDK_DRAG_STATUS_DROP } GtkDragStatus; typedef enum { GDK_DRAG_SOURCE, GDK_DRAG_TARGET } GdkDragKind; #ifdef OLE2_DND #define PRINT_RIID(riid) \ g_print ("riid = %.08x-%.04x-%.04x-%.02x%.02x-%.02x%.02x%.02x%.02x%.02x%.02x", \ ((gulong *) riid)[0], \ ((gushort *) riid)[2], \ ((gushort *) riid)[3], \ ((guchar *) riid)[8], \ ((guchar *) riid)[9], \ ((guchar *) riid)[10], \ ((guchar *) riid)[11], \ ((guchar *) riid)[12], \ ((guchar *) riid)[13], \ ((guchar *) riid)[14], \ ((guchar *) riid)[15]); HRESULT STDMETHODCALLTYPE m_query_interface_target (IDropTarget __RPC_FAR *This, /* [in] */ REFIID riid, /* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject); ULONG STDMETHODCALLTYPE m_add_ref_target (IDropTarget __RPC_FAR *This); ULONG STDMETHODCALLTYPE m_release_target (IDropTarget __RPC_FAR *This); HRESULT STDMETHODCALLTYPE m_drag_enter (IDropTarget __RPC_FAR *This, /* [unique][in] */ IDataObject __RPC_FAR *pDataObj, /* [in] */ DWORD grfKeyState, /* [in] */ POINTL pt, /* [out][in] */ DWORD __RPC_FAR *pdwEffect); HRESULT STDMETHODCALLTYPE m_drag_over (IDropTarget __RPC_FAR *This, /* [in] */ DWORD grfKeyState, /* [in] */ POINTL pt, /* [out][in] */ DWORD __RPC_FAR *pdwEffect); HRESULT STDMETHODCALLTYPE m_drag_leave (IDropTarget __RPC_FAR *This); HRESULT STDMETHODCALLTYPE m_drop (IDropTarget __RPC_FAR *This, /* [unique][in] */ IDataObject __RPC_FAR *pDataObj, /* [in] */ DWORD grfKeyState, /* [in] */ POINTL pt, /* [out][in] */ DWORD __RPC_FAR *pdwEffect); HRESULT STDMETHODCALLTYPE m_query_interface_source (IDropSource __RPC_FAR *This, /* [in] */ REFIID riid, /* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject); ULONG STDMETHODCALLTYPE m_add_ref_source (IDropSource __RPC_FAR *This); ULONG STDMETHODCALLTYPE m_release_source (IDropSource __RPC_FAR *This); HRESULT STDMETHODCALLTYPE m_query_continue_drag (IDropSource __RPC_FAR *This, /* [in] */ BOOL fEscapePressed, /* [in] */ DWORD grfKeyState); HRESULT STDMETHODCALLTYPE m_give_feedback (IDropSource __RPC_FAR *This, /* [in] */ DWORD dwEffect); #endif /* OLE2_DND */ /* Structure that holds information about a drag in progress. * this is used on both source and destination sides. */ struct _GdkDragContextPrivate { GdkDragContext context; guint ref_count; guint16 last_x; /* Coordinates from last event */ guint16 last_y; HWND dest_xid; guint drag_status; /* Current status of drag */ }; GdkDragContext *current_dest_drag = NULL; /* Drag Contexts */ static GList *contexts; GdkDragContext * gdk_drag_context_new (void) { GdkDragContextPrivate *result; result = g_new0 (GdkDragContextPrivate, 1); result->ref_count = 1; contexts = g_list_prepend (contexts, result); return (GdkDragContext *)result; } #ifdef OLE2_DND typedef struct { IDropTarget idt; GdkDragContext *context; } target_drag_context; typedef struct { IDropSource ids; GdkDragContext *context; } source_drag_context; HRESULT STDMETHODCALLTYPE m_query_interface_target (IDropTarget __RPC_FAR *This, /* [in] */ REFIID riid, /* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject) { GDK_NOTE (DND, g_print ("m_query_interface_target\n")); *ppvObject = NULL; PRINT_RIID (riid); if (IsEqualGUID (riid, &IID_IUnknown)) { g_print ("...IUnknown\n"); m_add_ref_target (This); *ppvObject = This; return S_OK; } else if (IsEqualGUID (riid, &IID_IDropTarget)) { g_print ("...IDropTarget\n"); m_add_ref_target (This); *ppvObject = This; return S_OK; } else { g_print ("...Huh?\n"); return E_NOINTERFACE; } } ULONG STDMETHODCALLTYPE m_add_ref_target (IDropTarget __RPC_FAR *This) { target_drag_context *ctx = (target_drag_context *) This; GdkDragContextPrivate *private = (GdkDragContextPrivate *) ctx->context; GDK_NOTE (DND, g_print ("m_add_ref_target\n")); gdk_drag_context_ref (ctx->context); return private->ref_count; } ULONG STDMETHODCALLTYPE m_release_target (IDropTarget __RPC_FAR *This) { target_drag_context *ctx = (target_drag_context *) This; GdkDragContextPrivate *private = (GdkDragContextPrivate *) ctx->context; GDK_NOTE (DND, g_print ("m_release_target\n")); gdk_drag_context_unref (ctx->context); if (private->ref_count == 1) { gdk_drag_context_unref (ctx->context); return 0; } else return private->ref_count - 1; } HRESULT STDMETHODCALLTYPE m_drag_enter (IDropTarget __RPC_FAR *This, /* [unique][in] */ IDataObject __RPC_FAR *pDataObj, /* [in] */ DWORD grfKeyState, /* [in] */ POINTL pt, /* [out][in] */ DWORD __RPC_FAR *pdwEffect) { GDK_NOTE (DND, g_print ("m_drag_enter\n")); return E_UNEXPECTED; } HRESULT STDMETHODCALLTYPE m_drag_over (IDropTarget __RPC_FAR *This, /* [in] */ DWORD grfKeyState, /* [in] */ POINTL pt, /* [out][in] */ DWORD __RPC_FAR *pdwEffect) { GDK_NOTE (DND, g_print ("m_drag_over\n")); return E_UNEXPECTED; } HRESULT STDMETHODCALLTYPE m_drag_leave (IDropTarget __RPC_FAR *This) { GDK_NOTE (DND, g_print ("m_drag_leave\n")); return E_UNEXPECTED; } HRESULT STDMETHODCALLTYPE m_drop (IDropTarget __RPC_FAR *This, /* [unique][in] */ IDataObject __RPC_FAR *pDataObj, /* [in] */ DWORD grfKeyState, /* [in] */ POINTL pt, /* [out][in] */ DWORD __RPC_FAR *pdwEffect) { GDK_NOTE (DND, g_print ("m_drop\n")); return E_UNEXPECTED; } HRESULT STDMETHODCALLTYPE m_query_interface_source (IDropSource __RPC_FAR *This, /* [in] */ REFIID riid, /* [iid_is][out] */ void __RPC_FAR *__RPC_FAR *ppvObject) { GDK_NOTE (DND, g_print ("m_query_interface_source\n")); *ppvObject = NULL; PRINT_RIID (riid); if (IsEqualGUID (riid, &IID_IUnknown)) { g_print ("...IUnknown\n"); m_add_ref_source (This); *ppvObject = This; return S_OK; } else if (IsEqualGUID (riid, &IID_IDropSource)) { g_print ("...IDropSource\n"); m_add_ref_source (This); *ppvObject = This; return S_OK; } else { g_print ("...Huh?\n"); return E_NOINTERFACE; } } ULONG STDMETHODCALLTYPE m_add_ref_source (IDropSource __RPC_FAR *This) { source_drag_context *ctx = (source_drag_context *) This; GdkDragContextPrivate *private = (GdkDragContextPrivate *) ctx->context; GDK_NOTE (DND, g_print ("m_add_ref_source\n")); gdk_drag_context_ref (ctx->context); return private->ref_count; } ULONG STDMETHODCALLTYPE m_release_source (IDropSource __RPC_FAR *This) { source_drag_context *ctx = (source_drag_context *) This; GdkDragContextPrivate *private = (GdkDragContextPrivate *) ctx->context; GDK_NOTE (DND, g_print ("m_release_source\n")); gdk_drag_context_unref (ctx->context); if (private->ref_count == 1) { gdk_drag_context_unref (ctx->context); return 0; } else return private->ref_count - 1; } HRESULT STDMETHODCALLTYPE m_query_continue_drag (IDropSource __RPC_FAR *This, /* [in] */ BOOL fEscapePressed, /* [in] */ DWORD grfKeyState) { GDK_NOTE (DND, g_print ("m_query_continue_drag\n")); return E_UNEXPECTED; } HRESULT STDMETHODCALLTYPE m_give_feedback (IDropSource __RPC_FAR *This, /* [in] */ DWORD dwEffect) { GDK_NOTE (DND, g_print ("m_give_feedback\n")); return E_UNEXPECTED; } static IDropTargetVtbl idt_vtbl = { m_query_interface_target, m_add_ref_target, m_release_target, m_drag_enter, m_drag_over, m_drag_leave, m_drop }; static IDropSourceVtbl ids_vtbl = { m_query_interface_source, m_add_ref_source, m_release_source, m_query_continue_drag, m_give_feedback }; target_drag_context * target_context_new (void) { target_drag_context *result; result = g_new0 (target_drag_context, 1); result->idt.lpVtbl = &idt_vtbl; result->context = gdk_drag_context_new (); return result; } source_drag_context * source_context_new (void) { source_drag_context *result; result = g_new0 (source_drag_context, 1); result->ids.lpVtbl = &ids_vtbl; result->context = gdk_drag_context_new (); return result; } #endif /* OLE2_DND */ void gdk_drag_context_ref (GdkDragContext *context) { g_return_if_fail (context != NULL); ((GdkDragContextPrivate *)context)->ref_count++; } void gdk_drag_context_unref (GdkDragContext *context) { GdkDragContextPrivate *private = (GdkDragContextPrivate *)context; g_return_if_fail (context != NULL); private->ref_count--; GDK_NOTE (DND, g_print ("gdk_drag_context_unref: %d%s\n", private->ref_count, (private->ref_count == 0 ? " freeing" : ""))); if (private->ref_count == 0) { g_dataset_destroy (private); g_list_free (context->targets); if (context->source_window) gdk_window_unref (context->source_window); if (context->dest_window) gdk_window_unref (context->dest_window); contexts = g_list_remove (contexts, private); g_free (private); } } #if 0 static GdkDragContext * gdk_drag_context_find (gboolean is_source, HWND source_xid, HWND dest_xid) { GList *tmp_list = contexts; GdkDragContext *context; while (tmp_list) { context = (GdkDragContext *)tmp_list->data; if ((!context->is_source == !is_source) && ((source_xid == None) || (context->source_window && (GDK_WINDOW_XWINDOW (context->source_window) == source_xid))) && ((dest_xid == None) || (context->dest_window && (GDK_WINDOW_XWINDOW (context->dest_window) == dest_xid)))) return context; tmp_list = tmp_list->next; } return NULL; } #endif #ifdef _MSC_VER /* From MS Knowledge Base article Q130698 */ /* resolve_link() fills the filename and path buffer * with relevant information * hWnd - calling app's window handle. * * lpszLinkName - name of the link file passed into the function. * * lpszPath - the buffer that will receive the file pathname. */ static HRESULT resolve_link(HWND hWnd, LPCTSTR lpszLinkName, LPSTR lpszPath, LPSTR lpszDescription) { HRESULT hres; IShellLink *psl; WIN32_FIND_DATA wfd; /* Assume Failure to start with: */ *lpszPath = 0; if (lpszDescription) *lpszDescription = 0; /* Call CoCreateInstance to obtain the IShellLink interface * pointer. This call fails if CoInitialize is not called, so it is * assumed that CoInitialize has been called. */ hres = CoCreateInstance (&CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, &IID_IShellLink, (LPVOID *)&psl); if (SUCCEEDED (hres)) { IPersistFile *ppf; /* The IShellLink interface supports the IPersistFile * interface. Get an interface pointer to it. */ hres = psl->lpVtbl->QueryInterface (psl, &IID_IPersistFile, (LPVOID *) &ppf); if (SUCCEEDED (hres)) { WORD wsz[MAX_PATH]; /* Convert the given link name string to wide character string. */ MultiByteToWideChar (CP_ACP, 0, lpszLinkName, -1, wsz, MAX_PATH); /* Load the file. */ hres = ppf->lpVtbl->Load (ppf, wsz, STGM_READ); if (SUCCEEDED (hres)) { /* Resolve the link by calling the Resolve() * interface function. */ hres = psl->lpVtbl->Resolve(psl, hWnd, SLR_ANY_MATCH | SLR_NO_UI); if (SUCCEEDED (hres)) { hres = psl->lpVtbl->GetPath (psl, lpszPath, MAX_PATH, (WIN32_FIND_DATA*)&wfd, 0); if (SUCCEEDED (hres) && lpszDescription != NULL) { hres = psl->lpVtbl->GetDescription (psl, lpszDescription, MAX_PATH ); if (!SUCCEEDED (hres)) return FALSE; } } } ppf->lpVtbl->Release (ppf); } psl->lpVtbl->Release (psl); } return SUCCEEDED (hres); } #else #define resolve_link(hWnd, lpszLinkName, lpszPath, lpszDescription) FALSE #endif static GdkFilterReturn gdk_dropfiles_filter (GdkXEvent *xev, GdkEvent *event, gpointer data) { GdkDragContext *context; GdkDragContextPrivate *private; static GdkAtom text_uri_list_atom = GDK_NONE; GString *result; MSG *msg = (MSG *) xev; HANDLE hdrop; POINT pt; gint nfiles, i, k; guchar fileName[MAX_PATH], linkedFile[MAX_PATH]; if (text_uri_list_atom == GDK_NONE) text_uri_list_atom = gdk_atom_intern ("text/uri-list", FALSE); if (msg->message == WM_DROPFILES) { GDK_NOTE (DND, g_print ("WM_DROPFILES: %#x\n", msg->hwnd)); context = gdk_drag_context_new (); private = (GdkDragContextPrivate *) context; context->protocol = GDK_DRAG_PROTO_WIN32_DROPFILES; context->is_source = FALSE; context->source_window = (GdkWindow *) &gdk_root_parent; context->dest_window = event->any.window; gdk_window_ref (context->dest_window); /* WM_DROPFILES drops are always file names */ context->targets = g_list_append (NULL, GUINT_TO_POINTER (text_uri_list_atom)); current_dest_drag = context; event->dnd.type = GDK_DROP_START; event->dnd.context = current_dest_drag; gdk_drag_context_ref (current_dest_drag); hdrop = (HANDLE) msg->wParam; DragQueryPoint (hdrop, &pt); ClientToScreen (msg->hwnd, &pt); event->dnd.x_root = pt.x; event->dnd.y_root = pt.y; event->dnd.time = msg->time; nfiles = DragQueryFile (hdrop, 0xFFFFFFFF, NULL, 0); result = g_string_new (NULL); for (i = 0; i < nfiles; i++) { g_string_append (result, "file:"); DragQueryFile (hdrop, i, fileName, MAX_PATH); /* Resolve shortcuts */ if (resolve_link (msg->hwnd, fileName, linkedFile, NULL)) { g_string_append (result, linkedFile); GDK_NOTE (DND, g_print ("...%s link to %s\n", fileName, linkedFile)); } else { g_string_append (result, fileName); GDK_NOTE (DND, g_print ("...%s\n", fileName)); } g_string_append (result, "\015\012"); } gdk_sel_prop_store ((GdkWindow *) &gdk_root_parent, text_uri_list_atom, 8, result->str, result->len + 1); DragFinish (hdrop); return GDK_FILTER_TRANSLATE; } else return GDK_FILTER_CONTINUE; } /************************************************************* ************************** Public API *********************** *************************************************************/ void gdk_dnd_init (void) { HRESULT hres; #ifdef OLE2_DND hres = OleInitialize (NULL); if (! SUCCEEDED (hres)) g_error ("OleInitialize failed"); #endif } void gdk_dnd_exit (void) { #ifdef OLE2_DND OleUninitialize (); #endif } /* Source side */ static void gdk_drag_do_leave (GdkDragContext *context, guint32 time) { if (context->dest_window) { GDK_NOTE (DND, g_print ("gdk_drag_do_leave\n")); gdk_window_unref (context->dest_window); context->dest_window = NULL; } } GdkDragContext * gdk_drag_begin (GdkWindow *window, GList *targets) { GList *tmp_list; GdkDragContext *new_context; g_return_val_if_fail (window != NULL, NULL); GDK_NOTE (DND, g_print ("gdk_drag_begin\n")); new_context = gdk_drag_context_new (); new_context->is_source = TRUE; new_context->source_window = window; gdk_window_ref (window); tmp_list = g_list_last (targets); new_context->targets = NULL; while (tmp_list) { new_context->targets = g_list_prepend (new_context->targets, tmp_list->data); tmp_list = tmp_list->prev; } new_context->actions = 0; return new_context; } guint32 gdk_drag_get_protocol (guint32 xid, GdkDragProtocol *protocol) { /* This isn't used */ return 0; } void gdk_drag_find_window (GdkDragContext *context, GdkWindow *drag_window, gint x_root, gint y_root, GdkWindow **dest_window, GdkDragProtocol *protocol) { GdkDragContextPrivate *private = (GdkDragContextPrivate *)context; GdkWindowPrivate *drag_window_private = (GdkWindowPrivate *) drag_window; HWND recipient; POINT pt; GDK_NOTE (DND, g_print ("gdk_drag_find_window: %#x +%d+%d\n", (drag_window ? drag_window_private->xwindow : 0), x_root, y_root)); pt.x = x_root; pt.y = y_root; recipient = WindowFromPoint (pt); if (recipient == NULL) *dest_window = NULL; else { *dest_window = gdk_window_lookup (recipient); if (*dest_window) gdk_window_ref (*dest_window); *protocol = GDK_DRAG_PROTO_WIN32_DROPFILES; } } 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) { return FALSE; } void gdk_drag_drop (GdkDragContext *context, guint32 time) { g_return_if_fail (context != NULL); g_warning ("gdk_drag_drop: not implemented\n"); } 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) { GDK_NOTE (DND, g_print ("gdk_drag_status\n")); } void gdk_drop_reply (GdkDragContext *context, gboolean ok, guint32 time) { } void gdk_drop_finish (GdkDragContext *context, gboolean success, guint32 time) { } static GdkFilterReturn gdk_destroy_filter (GdkXEvent *xev, GdkEvent *event, gpointer data) { #ifdef OLE2_DND MSG *msg = (MSG *) xev; if (msg->message == WM_DESTROY) { IDropTarget *idtp = (IDropTarget *) data; GDK_NOTE (DND, g_print ("gdk_destroy_filter: WM_DESTROY: %#x\n", msg->hwnd)); RevokeDragDrop (msg->hwnd); CoLockObjectExternal (idtp, FALSE, TRUE); } #endif return GDK_FILTER_CONTINUE; } void gdk_window_register_dnd (GdkWindow *window) { GdkWindowPrivate *private = (GdkWindowPrivate *) window; #ifdef OLE2_DND target_drag_context *context; HRESULT hres; #endif g_return_if_fail (window != NULL); GDK_NOTE (DND, g_print ("gdk_window_register_dnd: %#x\n", private->xwindow)); /* We always claim to accept dropped files, but in fact we might not, * of course. This function is called in such a way that it cannot know * whether the window (widget) in question actually accepts files * (in gtk, data of type text/uri-list) or not. */ gdk_window_add_filter (window, gdk_dropfiles_filter, NULL); DragAcceptFiles (private->xwindow, TRUE); #ifdef OLE2_DND /* Register for OLE2 d&d */ context = target_context_new (); hres = CoLockObjectExternal ((IUnknown *) &context->idt, TRUE, FALSE); if (!SUCCEEDED (hres)) g_warning ("gdk_window_register_dnd: CoLockObjectExternal failed"); else { hres = RegisterDragDrop (private->xwindow, &context->idt); if (hres == DRAGDROP_E_ALREADYREGISTERED) { g_print ("DRAGDROP_E_ALREADYREGISTERED\n"); CoLockObjectExternal ((IUnknown *) &context->idt, FALSE, FALSE); } else if (!SUCCEEDED (hres)) g_warning ("gdk_window_register_dnd: RegisterDragDrop failed"); else { gdk_window_add_filter (window, gdk_destroy_filter, &context->idt); } } #endif } /************************************************************* * gdk_drag_get_selection: * Returns the selection atom for the current source window * arguments: * * results: *************************************************************/ GdkAtom gdk_drag_get_selection (GdkDragContext *context) { if (context->protocol == GDK_DRAG_PROTO_WIN32_DROPFILES) return gdk_win32_dropfiles_atom; else if (context->protocol == GDK_DRAG_PROTO_OLE2) return gdk_ole2_dnd_atom; else return GDK_NONE; }