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316 lines
8.9 KiB
C
316 lines
8.9 KiB
C
/*
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* SHAppBarMessage implementation
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*
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* Copyright 2008 Vincent Povirk for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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* TODO: freedesktop _NET_WM_STRUT integration
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*
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* TODO: find when a fullscreen app is in the foreground and send FULLSCREENAPP
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* notifications
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*
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* TODO: detect changes in the screen size and send ABN_POSCHANGED ?
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*
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* TODO: multiple monitor support
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*/
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#include "windows.h"
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#include "shellapi.h"
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#include "wine/debug.h"
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#include "explorer_private.h"
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#include "wine/list.h"
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WINE_DEFAULT_DEBUG_CHANNEL(appbar);
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struct appbar_data_msg /* platform-independent data */
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{
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LONG hWnd;
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UINT uCallbackMessage;
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UINT uEdge;
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RECT rc;
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ULONGLONG lParam;
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};
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struct appbar_cmd
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{
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ULONG return_map;
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DWORD return_process;
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struct appbar_data_msg abd;
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};
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struct appbar_response
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{
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ULONGLONG result;
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struct appbar_data_msg abd;
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};
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static HWND appbarmsg_window = NULL;
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struct appbar_data
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{
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struct list entry;
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HWND hwnd;
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UINT callback_msg;
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UINT edge;
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RECT rc;
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BOOL space_reserved;
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/* BOOL autohide; */
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};
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static struct list appbars = LIST_INIT(appbars);
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static struct appbar_data* get_appbar(HWND hwnd)
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{
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struct appbar_data* data;
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LIST_FOR_EACH_ENTRY(data, &appbars, struct appbar_data, entry)
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{
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if (data->hwnd == hwnd)
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return data;
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}
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return NULL;
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}
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/* send_poschanged: send ABN_POSCHANGED to every appbar except one */
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static void send_poschanged(HWND hwnd)
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{
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struct appbar_data* data;
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LIST_FOR_EACH_ENTRY(data, &appbars, struct appbar_data, entry)
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{
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if (data->hwnd != hwnd)
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{
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PostMessageW(data->hwnd, data->callback_msg, ABN_POSCHANGED, 0);
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}
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}
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}
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/* appbar_cliprect: cut out parts of the rectangle that interfere with existing appbars */
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static void appbar_cliprect( HWND hwnd, RECT *rect )
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{
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struct appbar_data* data;
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LIST_FOR_EACH_ENTRY(data, &appbars, struct appbar_data, entry)
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{
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if (data->hwnd == hwnd)
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{
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/* we only care about appbars that were added before this one */
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return;
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}
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if (data->space_reserved)
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{
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/* move in the side that corresponds to the other appbar's edge */
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switch (data->edge)
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{
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case ABE_BOTTOM:
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rect->bottom = min(rect->bottom, data->rc.top);
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break;
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case ABE_LEFT:
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rect->left = max(rect->left, data->rc.right);
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break;
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case ABE_RIGHT:
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rect->right = min(rect->right, data->rc.left);
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break;
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case ABE_TOP:
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rect->top = max(rect->top, data->rc.bottom);
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break;
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}
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}
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}
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}
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static UINT_PTR handle_appbarmessage(DWORD msg, struct appbar_data_msg *abd)
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{
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struct appbar_data* data;
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HWND hwnd = LongToHandle( abd->hWnd );
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switch (msg)
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{
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case ABM_NEW:
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if (get_appbar(hwnd))
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{
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/* fail when adding an hwnd the second time */
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return FALSE;
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}
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data = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(struct appbar_data));
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if (!data)
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{
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WINE_ERR("out of memory\n");
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return FALSE;
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}
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data->hwnd = hwnd;
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data->callback_msg = abd->uCallbackMessage;
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list_add_tail(&appbars, &data->entry);
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return TRUE;
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case ABM_REMOVE:
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if ((data = get_appbar(hwnd)))
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{
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list_remove(&data->entry);
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send_poschanged(hwnd);
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HeapFree(GetProcessHeap(), 0, data);
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}
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else
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WINE_WARN("removing hwnd %p not on the list\n", hwnd);
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return TRUE;
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case ABM_QUERYPOS:
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if (abd->uEdge > ABE_BOTTOM)
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WINE_WARN("invalid edge %i for %p\n", abd->uEdge, hwnd);
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appbar_cliprect( hwnd, &abd->rc );
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return TRUE;
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case ABM_SETPOS:
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if (abd->uEdge > ABE_BOTTOM)
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{
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WINE_WARN("invalid edge %i for %p\n", abd->uEdge, hwnd);
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return TRUE;
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}
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if ((data = get_appbar(hwnd)))
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{
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/* calculate acceptable space */
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appbar_cliprect( hwnd, &abd->rc );
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if (!EqualRect(&abd->rc, &data->rc))
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send_poschanged(hwnd);
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/* reserve that space for this appbar */
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data->edge = abd->uEdge;
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data->rc = abd->rc;
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data->space_reserved = TRUE;
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}
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else
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{
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WINE_WARN("app sent ABM_SETPOS message for %p without ABM_ADD\n", hwnd);
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}
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return TRUE;
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case ABM_GETSTATE:
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WINE_FIXME("SHAppBarMessage(ABM_GETSTATE): stub\n");
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return ABS_ALWAYSONTOP | ABS_AUTOHIDE;
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case ABM_GETTASKBARPOS:
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WINE_FIXME("SHAppBarMessage(ABM_GETTASKBARPOS, hwnd=%p): stub\n", hwnd);
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/* Report the taskbar is at the bottom of the screen. */
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abd->rc.left = 0;
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abd->rc.right = GetSystemMetrics(SM_CXSCREEN);
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abd->rc.bottom = GetSystemMetrics(SM_CYSCREEN);
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abd->rc.top = abd->rc.bottom-1;
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abd->uEdge = ABE_BOTTOM;
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return TRUE;
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case ABM_ACTIVATE:
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return TRUE;
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case ABM_GETAUTOHIDEBAR:
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WINE_FIXME("SHAppBarMessage(ABM_GETAUTOHIDEBAR, hwnd=%p, edge=%x): stub\n", hwnd, abd->uEdge);
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return 0;
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case ABM_SETAUTOHIDEBAR:
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WINE_FIXME("SHAppBarMessage(ABM_SETAUTOHIDEBAR, hwnd=%p, edge=%x, lparam=%s): stub\n",
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hwnd, abd->uEdge, wine_dbgstr_longlong(abd->lParam));
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return TRUE;
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case ABM_WINDOWPOSCHANGED:
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return TRUE;
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default:
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WINE_FIXME("SHAppBarMessage(%x) unimplemented\n", msg);
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return FALSE;
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}
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}
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static LRESULT CALLBACK appbar_wndproc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
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{
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switch (msg)
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{
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case WM_COPYDATA:
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{
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COPYDATASTRUCT* cds;
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struct appbar_cmd cmd;
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UINT_PTR result;
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HANDLE return_hproc;
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HANDLE return_map;
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LPVOID return_view;
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struct appbar_response* response;
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cds = (COPYDATASTRUCT*)lparam;
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if (cds->cbData != sizeof(struct appbar_cmd))
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return TRUE;
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CopyMemory(&cmd, cds->lpData, cds->cbData);
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result = handle_appbarmessage(cds->dwData, &cmd.abd);
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return_hproc = OpenProcess(PROCESS_DUP_HANDLE, FALSE, cmd.return_process);
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if (return_hproc == NULL)
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{
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WINE_ERR("couldn't open calling process\n");
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return TRUE;
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}
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if (!DuplicateHandle(return_hproc, UlongToHandle(cmd.return_map),
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GetCurrentProcess(), &return_map, 0, FALSE, DUPLICATE_SAME_ACCESS))
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{
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WINE_ERR("couldn't duplicate handle\n");
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CloseHandle(return_hproc);
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return TRUE;
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}
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CloseHandle(return_hproc);
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return_view = MapViewOfFile(return_map, FILE_MAP_WRITE, 0, 0, sizeof(struct appbar_response));
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if (return_view)
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{
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response = (struct appbar_response*)return_view;
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response->result = result;
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response->abd = cmd.abd;
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UnmapViewOfFile(return_view);
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}
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else
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WINE_ERR("couldn't map view of file\n");
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CloseHandle(return_map);
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return TRUE;
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}
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default:
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break;
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}
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return DefWindowProcW(hwnd, msg, wparam, lparam);
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}
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void initialize_appbar(void)
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{
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WNDCLASSEXW class;
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static const WCHAR classname[] = {'W','i','n','e','A','p','p','B','a','r',0};
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/* register the appbar window class */
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ZeroMemory(&class, sizeof(class));
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class.cbSize = sizeof(class);
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class.lpfnWndProc = appbar_wndproc;
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class.hInstance = NULL;
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class.lpszClassName = classname;
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if (!RegisterClassExW(&class))
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{
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WINE_ERR("Could not register appbar message window class\n");
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return;
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}
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appbarmsg_window = CreateWindowW(classname, classname, 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
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if (!appbarmsg_window)
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{
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WINE_ERR("Could not create appbar message window\n");
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return;
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}
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}
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