| /* |
| * Window painting functions |
| * |
| * Copyright 1993, 1994, 1995, 2001, 2004, 2005, 2008 Alexandre Julliard |
| * Copyright 1996, 1997, 1999 Alex Korobka |
| * |
| * 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 2.1 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
| */ |
| |
| #include "config.h" |
| #include "wine/port.h" |
| |
| #include <assert.h> |
| #include <stdarg.h> |
| #include <string.h> |
| |
| #include "ntstatus.h" |
| #define WIN32_NO_STATUS |
| #include "windef.h" |
| #include "winbase.h" |
| #include "wingdi.h" |
| #include "winuser.h" |
| #include "wine/server.h" |
| #include "win.h" |
| #include "user_private.h" |
| #include "controls.h" |
| #include "wine/list.h" |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(win); |
| |
| |
| struct dce |
| { |
| struct list entry; /* entry in global DCE list */ |
| HDC hdc; |
| HWND hwnd; |
| HRGN clip_rgn; |
| DWORD flags; |
| LONG count; /* usage count; 0 or 1 for cache DCEs, always 1 for window DCEs, |
| always >= 1 for class DCEs */ |
| }; |
| |
| static struct list dce_list = LIST_INIT(dce_list); |
| |
| static BOOL CALLBACK dc_hook( HDC hDC, WORD code, DWORD_PTR data, LPARAM lParam ); |
| |
| static const WCHAR displayW[] = { 'D','I','S','P','L','A','Y',0 }; |
| |
| |
| /*********************************************************************** |
| * dump_rdw_flags |
| */ |
| static void dump_rdw_flags(UINT flags) |
| { |
| TRACE("flags:"); |
| if (flags & RDW_INVALIDATE) TRACE(" RDW_INVALIDATE"); |
| if (flags & RDW_INTERNALPAINT) TRACE(" RDW_INTERNALPAINT"); |
| if (flags & RDW_ERASE) TRACE(" RDW_ERASE"); |
| if (flags & RDW_VALIDATE) TRACE(" RDW_VALIDATE"); |
| if (flags & RDW_NOINTERNALPAINT) TRACE(" RDW_NOINTERNALPAINT"); |
| if (flags & RDW_NOERASE) TRACE(" RDW_NOERASE"); |
| if (flags & RDW_NOCHILDREN) TRACE(" RDW_NOCHILDREN"); |
| if (flags & RDW_ALLCHILDREN) TRACE(" RDW_ALLCHILDREN"); |
| if (flags & RDW_UPDATENOW) TRACE(" RDW_UPDATENOW"); |
| if (flags & RDW_ERASENOW) TRACE(" RDW_ERASENOW"); |
| if (flags & RDW_FRAME) TRACE(" RDW_FRAME"); |
| if (flags & RDW_NOFRAME) TRACE(" RDW_NOFRAME"); |
| |
| #define RDW_FLAGS \ |
| (RDW_INVALIDATE | \ |
| RDW_INTERNALPAINT | \ |
| RDW_ERASE | \ |
| RDW_VALIDATE | \ |
| RDW_NOINTERNALPAINT | \ |
| RDW_NOERASE | \ |
| RDW_NOCHILDREN | \ |
| RDW_ALLCHILDREN | \ |
| RDW_UPDATENOW | \ |
| RDW_ERASENOW | \ |
| RDW_FRAME | \ |
| RDW_NOFRAME) |
| |
| if (flags & ~RDW_FLAGS) TRACE(" %04x", flags & ~RDW_FLAGS); |
| TRACE("\n"); |
| #undef RDW_FLAGS |
| } |
| |
| |
| /*********************************************************************** |
| * update_visible_region |
| * |
| * Set the visible region and X11 drawable for the DC associated to |
| * a given window. |
| */ |
| static void update_visible_region( struct dce *dce ) |
| { |
| NTSTATUS status; |
| HRGN vis_rgn = 0; |
| HWND top_win = 0; |
| DWORD flags = dce->flags; |
| size_t size = 256; |
| RECT win_rect, top_rect; |
| |
| /* don't clip siblings if using parent clip region */ |
| if (flags & DCX_PARENTCLIP) flags &= ~DCX_CLIPSIBLINGS; |
| |
| /* fetch the visible region from the server */ |
| do |
| { |
| RGNDATA *data = HeapAlloc( GetProcessHeap(), 0, sizeof(*data) + size - 1 ); |
| if (!data) return; |
| |
| SERVER_START_REQ( get_visible_region ) |
| { |
| req->window = wine_server_user_handle( dce->hwnd ); |
| req->flags = flags; |
| wine_server_set_reply( req, data->Buffer, size ); |
| if (!(status = wine_server_call( req ))) |
| { |
| size_t reply_size = wine_server_reply_size( reply ); |
| data->rdh.dwSize = sizeof(data->rdh); |
| data->rdh.iType = RDH_RECTANGLES; |
| data->rdh.nCount = reply_size / sizeof(RECT); |
| data->rdh.nRgnSize = reply_size; |
| vis_rgn = ExtCreateRegion( NULL, size, data ); |
| |
| top_win = wine_server_ptr_handle( reply->top_win ); |
| win_rect.left = reply->win_rect.left; |
| win_rect.top = reply->win_rect.top; |
| win_rect.right = reply->win_rect.right; |
| win_rect.bottom = reply->win_rect.bottom; |
| top_rect.left = reply->top_rect.left; |
| top_rect.top = reply->top_rect.top; |
| top_rect.right = reply->top_rect.right; |
| top_rect.bottom = reply->top_rect.bottom; |
| } |
| else size = reply->total_size; |
| } |
| SERVER_END_REQ; |
| HeapFree( GetProcessHeap(), 0, data ); |
| } while (status == STATUS_BUFFER_OVERFLOW); |
| |
| if (status || !vis_rgn) return; |
| |
| USER_Driver->pGetDC( dce->hdc, dce->hwnd, top_win, &win_rect, &top_rect, flags ); |
| |
| if (dce->clip_rgn) CombineRgn( vis_rgn, vis_rgn, dce->clip_rgn, |
| (flags & DCX_INTERSECTRGN) ? RGN_AND : RGN_DIFF ); |
| |
| /* map region to DC coordinates */ |
| OffsetRgn( vis_rgn, -win_rect.left, -win_rect.top ); |
| SelectVisRgn( dce->hdc, vis_rgn ); |
| DeleteObject( vis_rgn ); |
| } |
| |
| |
| /*********************************************************************** |
| * release_dce |
| */ |
| static void release_dce( struct dce *dce ) |
| { |
| if (!dce->hwnd) return; /* already released */ |
| |
| USER_Driver->pReleaseDC( dce->hwnd, dce->hdc ); |
| |
| if (dce->clip_rgn) DeleteObject( dce->clip_rgn ); |
| dce->clip_rgn = 0; |
| dce->hwnd = 0; |
| dce->flags &= DCX_CACHE; |
| } |
| |
| |
| /*********************************************************************** |
| * delete_clip_rgn |
| */ |
| static void delete_clip_rgn( struct dce *dce ) |
| { |
| if (!dce->clip_rgn) return; /* nothing to do */ |
| |
| dce->flags &= ~(DCX_EXCLUDERGN | DCX_INTERSECTRGN); |
| DeleteObject( dce->clip_rgn ); |
| dce->clip_rgn = 0; |
| |
| /* make it dirty so that the vis rgn gets recomputed next time */ |
| SetHookFlags( dce->hdc, DCHF_INVALIDATEVISRGN ); |
| } |
| |
| |
| /*********************************************************************** |
| * alloc_dce |
| * |
| * Allocate a new DCE. |
| */ |
| static struct dce *alloc_dce(void) |
| { |
| struct dce *dce; |
| |
| if (!(dce = HeapAlloc( GetProcessHeap(), 0, sizeof(*dce) ))) return NULL; |
| if (!(dce->hdc = CreateDCW( displayW, NULL, NULL, NULL ))) |
| { |
| HeapFree( GetProcessHeap(), 0, dce ); |
| return 0; |
| } |
| SaveDC( dce->hdc ); |
| |
| dce->hwnd = 0; |
| dce->clip_rgn = 0; |
| dce->flags = 0; |
| dce->count = 1; |
| |
| /* store DCE handle in DC hook data field */ |
| SetDCHook( dce->hdc, dc_hook, (DWORD_PTR)dce ); |
| SetHookFlags( dce->hdc, DCHF_INVALIDATEVISRGN ); |
| return dce; |
| } |
| |
| |
| /*********************************************************************** |
| * get_window_dce |
| */ |
| static struct dce *get_window_dce( HWND hwnd ) |
| { |
| struct dce *dce; |
| WND *win = WIN_GetPtr( hwnd ); |
| |
| if (!win || win == WND_OTHER_PROCESS || win == WND_DESKTOP) return NULL; |
| |
| dce = win->dce; |
| if (!dce && (dce = get_class_dce( win->class ))) |
| { |
| win->dce = dce; |
| dce->count++; |
| } |
| WIN_ReleasePtr( win ); |
| |
| if (!dce) /* try to allocate one */ |
| { |
| struct dce *dce_to_free = NULL; |
| LONG class_style = GetClassLongW( hwnd, GCL_STYLE ); |
| |
| if (class_style & CS_CLASSDC) |
| { |
| if (!(dce = alloc_dce())) return NULL; |
| |
| win = WIN_GetPtr( hwnd ); |
| if (win && win != WND_OTHER_PROCESS && win != WND_DESKTOP) |
| { |
| if (win->dce) /* another thread beat us to it */ |
| { |
| dce_to_free = dce; |
| dce = win->dce; |
| } |
| else if ((win->dce = set_class_dce( win->class, dce )) != dce) |
| { |
| dce_to_free = dce; |
| dce = win->dce; |
| dce->count++; |
| } |
| else |
| { |
| dce->count++; |
| list_add_tail( &dce_list, &dce->entry ); |
| } |
| WIN_ReleasePtr( win ); |
| } |
| else dce_to_free = dce; |
| } |
| else if (class_style & CS_OWNDC) |
| { |
| if (!(dce = alloc_dce())) return NULL; |
| |
| win = WIN_GetPtr( hwnd ); |
| if (win && win != WND_OTHER_PROCESS && win != WND_DESKTOP) |
| { |
| if (win->dwStyle & WS_CLIPCHILDREN) dce->flags |= DCX_CLIPCHILDREN; |
| if (win->dwStyle & WS_CLIPSIBLINGS) dce->flags |= DCX_CLIPSIBLINGS; |
| if (win->dce) /* another thread beat us to it */ |
| { |
| dce_to_free = dce; |
| dce = win->dce; |
| } |
| else |
| { |
| win->dce = dce; |
| dce->hwnd = hwnd; |
| dce->count++; |
| list_add_tail( &dce_list, &dce->entry ); |
| } |
| WIN_ReleasePtr( win ); |
| } |
| else dce_to_free = dce; |
| } |
| |
| if (dce_to_free) |
| { |
| SetDCHook( dce->hdc, NULL, 0 ); |
| DeleteDC( dce->hdc ); |
| HeapFree( GetProcessHeap(), 0, dce ); |
| } |
| } |
| return dce; |
| } |
| |
| |
| /*********************************************************************** |
| * free_dce |
| * |
| * Free a class or window DCE. |
| */ |
| void free_dce( struct dce *dce, HWND hwnd ) |
| { |
| USER_Lock(); |
| |
| if (dce) |
| { |
| if (!--dce->count) |
| { |
| /* turn it into a cache entry */ |
| release_dce( dce ); |
| dce->flags |= DCX_CACHE; |
| } |
| else if (dce->hwnd == hwnd) |
| { |
| release_dce( dce ); |
| } |
| } |
| |
| /* now check for cache DCEs */ |
| |
| if (hwnd) |
| { |
| LIST_FOR_EACH_ENTRY( dce, &dce_list, struct dce, entry ) |
| { |
| if (dce->hwnd != hwnd) continue; |
| if (!(dce->flags & DCX_CACHE)) continue; |
| |
| if (dce->count) WARN( "GetDC() without ReleaseDC() for window %p\n", hwnd ); |
| dce->count = 0; |
| release_dce( dce ); |
| } |
| } |
| |
| USER_Unlock(); |
| } |
| |
| |
| /*********************************************************************** |
| * make_dc_dirty |
| * |
| * Mark the associated DC as dirty to force a refresh of the visible region |
| */ |
| static void make_dc_dirty( struct dce *dce ) |
| { |
| if (!dce->count) |
| { |
| /* Don't bother with visible regions of unused DCEs */ |
| TRACE("\tpurged %p dce [%p]\n", dce, dce->hwnd); |
| release_dce( dce ); |
| } |
| else |
| { |
| /* Set dirty bits in the hDC and DCE structs */ |
| TRACE("\tfixed up %p dce [%p]\n", dce, dce->hwnd); |
| SetHookFlags( dce->hdc, DCHF_INVALIDATEVISRGN ); |
| } |
| } |
| |
| |
| /*********************************************************************** |
| * invalidate_dce |
| * |
| * It is called from SetWindowPos() - we have to |
| * mark as dirty all busy DCEs for windows that have pWnd->parent as |
| * an ancestor and whose client rect intersects with specified update |
| * rectangle. In addition, pWnd->parent DCEs may need to be updated if |
| * DCX_CLIPCHILDREN flag is set. |
| */ |
| void invalidate_dce( HWND hwnd, const RECT *rect ) |
| { |
| RECT window_rect, extra_rect; |
| struct dce *dce; |
| HWND hwndScope = GetAncestor( hwnd, GA_PARENT ); |
| |
| if (!hwndScope) return; |
| |
| GetWindowRect( hwnd, &window_rect ); |
| if (rect) |
| { |
| extra_rect = *rect; |
| MapWindowPoints( hwndScope, 0, (POINT *)&extra_rect, 2 ); |
| } |
| |
| TRACE("%p scope hwnd = %p %s (%s)\n", |
| hwnd, hwndScope, wine_dbgstr_rect(&window_rect), wine_dbgstr_rect(rect) ); |
| |
| /* walk all DCEs and fixup non-empty entries */ |
| |
| USER_Lock(); |
| LIST_FOR_EACH_ENTRY( dce, &dce_list, struct dce, entry ) |
| { |
| TRACE( "%p: hwnd %p dcx %08x %s %s\n", dce, dce->hwnd, dce->flags, |
| (dce->flags & DCX_CACHE) ? "Cache" : "Owned", dce->count ? "InUse" : "" ); |
| |
| if (!dce->hwnd) continue; |
| if ((dce->hwnd == hwndScope) && !(dce->flags & DCX_CLIPCHILDREN)) |
| continue; /* child window positions don't bother us */ |
| |
| /* if DCE window is a child of hwnd, it has to be invalidated */ |
| if (dce->hwnd == hwnd || IsChild( hwnd, dce->hwnd )) |
| { |
| make_dc_dirty( dce ); |
| } |
| else /* otherwise check if the window rectangle intersects this DCE window */ |
| { |
| if (hwndScope == GetDesktopWindow() || |
| hwndScope == dce->hwnd || IsChild( hwndScope, dce->hwnd )) |
| { |
| RECT dce_rect, tmp; |
| GetWindowRect( dce->hwnd, &dce_rect ); |
| if (IntersectRect( &tmp, &dce_rect, &window_rect ) || |
| (rect && IntersectRect( &tmp, &dce_rect, &extra_rect ))) |
| make_dc_dirty( dce ); |
| } |
| } |
| } |
| USER_Unlock(); |
| } |
| |
| /*********************************************************************** |
| * release_dc |
| * |
| * Implementation of ReleaseDC. |
| */ |
| static INT release_dc( HWND hwnd, HDC hdc, BOOL end_paint ) |
| { |
| struct dce *dce; |
| BOOL ret = FALSE; |
| |
| TRACE("%p %p\n", hwnd, hdc ); |
| |
| USER_Lock(); |
| dce = (struct dce *)GetDCHook( hdc, NULL ); |
| if (dce && dce->count) |
| { |
| if (end_paint || (dce->flags & DCX_CACHE)) delete_clip_rgn( dce ); |
| if (dce->flags & DCX_CACHE) dce->count = 0; |
| ret = TRUE; |
| } |
| USER_Unlock(); |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * dc_hook |
| * |
| * See "Undoc. Windows" for hints (DC, SetDCHook, SetHookFlags).. |
| */ |
| static BOOL CALLBACK dc_hook( HDC hDC, WORD code, DWORD_PTR data, LPARAM lParam ) |
| { |
| BOOL retv = TRUE; |
| struct dce *dce = (struct dce *)data; |
| |
| TRACE("hDC = %p, %u\n", hDC, code); |
| |
| if (!dce) return 0; |
| assert( dce->hdc == hDC ); |
| |
| switch( code ) |
| { |
| case DCHC_INVALIDVISRGN: |
| /* GDI code calls this when it detects that the |
| * DC is dirty (usually after SetHookFlags()). This |
| * means that we have to recompute the visible region. |
| */ |
| if (dce->count) update_visible_region( dce ); |
| else /* non-fatal but shouldn't happen */ |
| WARN("DC is not in use!\n"); |
| break; |
| case DCHC_DELETEDC: |
| /* |
| * Windows will not let you delete a DC that is busy |
| * (between GetDC and ReleaseDC) |
| */ |
| USER_Lock(); |
| if (dce->count > 1) |
| { |
| WARN("Application trying to delete a busy DC %p\n", dce->hdc); |
| retv = FALSE; |
| } |
| else |
| { |
| list_remove( &dce->entry ); |
| if (dce->clip_rgn) DeleteObject( dce->clip_rgn ); |
| HeapFree( GetProcessHeap(), 0, dce ); |
| } |
| USER_Unlock(); |
| break; |
| } |
| return retv; |
| } |
| |
| |
| /*********************************************************************** |
| * get_update_region |
| * |
| * Return update region (in screen coordinates) for a window. |
| */ |
| static HRGN get_update_region( HWND hwnd, UINT *flags, HWND *child ) |
| { |
| HRGN hrgn = 0; |
| NTSTATUS status; |
| RGNDATA *data; |
| size_t size = 256; |
| |
| do |
| { |
| if (!(data = HeapAlloc( GetProcessHeap(), 0, sizeof(*data) + size - 1 ))) |
| { |
| SetLastError( ERROR_OUTOFMEMORY ); |
| return 0; |
| } |
| |
| SERVER_START_REQ( get_update_region ) |
| { |
| req->window = wine_server_user_handle( hwnd ); |
| req->from_child = wine_server_user_handle( child ? *child : 0 ); |
| req->flags = *flags; |
| wine_server_set_reply( req, data->Buffer, size ); |
| if (!(status = wine_server_call( req ))) |
| { |
| size_t reply_size = wine_server_reply_size( reply ); |
| data->rdh.dwSize = sizeof(data->rdh); |
| data->rdh.iType = RDH_RECTANGLES; |
| data->rdh.nCount = reply_size / sizeof(RECT); |
| data->rdh.nRgnSize = reply_size; |
| hrgn = ExtCreateRegion( NULL, size, data ); |
| if (child) *child = wine_server_ptr_handle( reply->child ); |
| *flags = reply->flags; |
| } |
| else size = reply->total_size; |
| } |
| SERVER_END_REQ; |
| HeapFree( GetProcessHeap(), 0, data ); |
| } while (status == STATUS_BUFFER_OVERFLOW); |
| |
| if (status) SetLastError( RtlNtStatusToDosError(status) ); |
| return hrgn; |
| } |
| |
| |
| /*********************************************************************** |
| * get_update_flags |
| * |
| * Get only the update flags, not the update region. |
| */ |
| static BOOL get_update_flags( HWND hwnd, HWND *child, UINT *flags ) |
| { |
| BOOL ret; |
| |
| SERVER_START_REQ( get_update_region ) |
| { |
| req->window = wine_server_user_handle( hwnd ); |
| req->from_child = wine_server_user_handle( child ? *child : 0 ); |
| req->flags = *flags | UPDATE_NOREGION; |
| if ((ret = !wine_server_call_err( req ))) |
| { |
| if (child) *child = wine_server_ptr_handle( reply->child ); |
| *flags = reply->flags; |
| } |
| } |
| SERVER_END_REQ; |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * redraw_window_rects |
| * |
| * Redraw part of a window. |
| */ |
| static BOOL redraw_window_rects( HWND hwnd, UINT flags, const RECT *rects, UINT count ) |
| { |
| BOOL ret; |
| |
| if (!(flags & (RDW_INVALIDATE|RDW_VALIDATE|RDW_INTERNALPAINT|RDW_NOINTERNALPAINT))) |
| return TRUE; /* nothing to do */ |
| |
| SERVER_START_REQ( redraw_window ) |
| { |
| req->window = wine_server_user_handle( hwnd ); |
| req->flags = flags; |
| wine_server_add_data( req, rects, count * sizeof(RECT) ); |
| ret = !wine_server_call_err( req ); |
| } |
| SERVER_END_REQ; |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * send_ncpaint |
| * |
| * Send a WM_NCPAINT message if needed, and return the resulting update region (in screen coords). |
| * Helper for erase_now and BeginPaint. |
| */ |
| static HRGN send_ncpaint( HWND hwnd, HWND *child, UINT *flags ) |
| { |
| HRGN whole_rgn = get_update_region( hwnd, flags, child ); |
| HRGN client_rgn = 0; |
| |
| if (child) hwnd = *child; |
| |
| if (hwnd == GetDesktopWindow()) return whole_rgn; |
| |
| if (whole_rgn) |
| { |
| RECT client, update; |
| INT type; |
| |
| /* check if update rgn overlaps with nonclient area */ |
| type = GetRgnBox( whole_rgn, &update ); |
| GetClientRect( hwnd, &client ); |
| MapWindowPoints( hwnd, 0, (POINT *)&client, 2 ); |
| |
| if ((*flags & UPDATE_NONCLIENT) || |
| update.left < client.left || update.top < client.top || |
| update.right > client.right || update.bottom > client.bottom) |
| { |
| client_rgn = CreateRectRgnIndirect( &client ); |
| CombineRgn( client_rgn, client_rgn, whole_rgn, RGN_AND ); |
| |
| /* check if update rgn contains complete nonclient area */ |
| if (type == SIMPLEREGION) |
| { |
| RECT window; |
| GetWindowRect( hwnd, &window ); |
| if (EqualRect( &window, &update )) |
| { |
| DeleteObject( whole_rgn ); |
| whole_rgn = (HRGN)1; |
| } |
| } |
| } |
| else |
| { |
| client_rgn = whole_rgn; |
| whole_rgn = 0; |
| } |
| |
| if (whole_rgn) /* NOTE: WM_NCPAINT allows wParam to be 1 */ |
| { |
| if (*flags & UPDATE_NONCLIENT) SendMessageW( hwnd, WM_NCPAINT, (WPARAM)whole_rgn, 0 ); |
| if (whole_rgn > (HRGN)1) DeleteObject( whole_rgn ); |
| } |
| } |
| return client_rgn; |
| } |
| |
| |
| /*********************************************************************** |
| * send_erase |
| * |
| * Send a WM_ERASEBKGND message if needed, and optionally return the DC for painting. |
| * If a DC is requested, the region is selected into it. In all cases the region is deleted. |
| * Helper for erase_now and BeginPaint. |
| */ |
| static BOOL send_erase( HWND hwnd, UINT flags, HRGN client_rgn, |
| RECT *clip_rect, HDC *hdc_ret ) |
| { |
| BOOL need_erase = (flags & UPDATE_DELAYED_ERASE) != 0; |
| HDC hdc = 0; |
| RECT dummy; |
| |
| if (!clip_rect) clip_rect = &dummy; |
| if (hdc_ret || (flags & UPDATE_ERASE)) |
| { |
| UINT dcx_flags = DCX_INTERSECTRGN | DCX_USESTYLE; |
| if (IsIconic(hwnd)) dcx_flags |= DCX_WINDOW; |
| |
| if ((hdc = GetDCEx( hwnd, client_rgn, dcx_flags ))) |
| { |
| INT type = GetClipBox( hdc, clip_rect ); |
| |
| if (flags & UPDATE_ERASE) |
| { |
| /* don't erase if the clip box is empty */ |
| if (type != NULLREGION) |
| need_erase = !SendMessageW( hwnd, WM_ERASEBKGND, (WPARAM)hdc, 0 ); |
| } |
| if (!hdc_ret) release_dc( hwnd, hdc, TRUE ); |
| } |
| |
| if (hdc_ret) *hdc_ret = hdc; |
| } |
| if (!hdc) DeleteObject( client_rgn ); |
| return need_erase; |
| } |
| |
| |
| /*********************************************************************** |
| * erase_now |
| * |
| * Implementation of RDW_ERASENOW behavior. |
| */ |
| void erase_now( HWND hwnd, UINT rdw_flags ) |
| { |
| HWND child = 0; |
| HRGN hrgn; |
| BOOL need_erase = FALSE; |
| |
| /* loop while we find a child to repaint */ |
| for (;;) |
| { |
| UINT flags = UPDATE_NONCLIENT | UPDATE_ERASE; |
| |
| if (rdw_flags & RDW_NOCHILDREN) flags |= UPDATE_NOCHILDREN; |
| else if (rdw_flags & RDW_ALLCHILDREN) flags |= UPDATE_ALLCHILDREN; |
| if (need_erase) flags |= UPDATE_DELAYED_ERASE; |
| |
| if (!(hrgn = send_ncpaint( hwnd, &child, &flags ))) break; |
| need_erase = send_erase( child, flags, hrgn, NULL, NULL ); |
| |
| if (!flags) break; /* nothing more to do */ |
| if ((rdw_flags & RDW_NOCHILDREN) && !need_erase) break; |
| } |
| } |
| |
| |
| /*********************************************************************** |
| * update_now |
| * |
| * Implementation of RDW_UPDATENOW behavior. |
| * |
| * FIXME: Windows uses WM_SYNCPAINT to cut down the number of intertask |
| * SendMessage() calls. This is a comment inside DefWindowProc() source |
| * from 16-bit SDK: |
| * |
| * This message avoids lots of inter-app message traffic |
| * by switching to the other task and continuing the |
| * recursion there. |
| * |
| * wParam = flags |
| * LOWORD(lParam) = hrgnClip |
| * HIWORD(lParam) = hwndSkip (not used; always NULL) |
| * |
| */ |
| static void update_now( HWND hwnd, UINT rdw_flags ) |
| { |
| HWND child = 0; |
| |
| /* desktop window never gets WM_PAINT, only WM_ERASEBKGND */ |
| if (hwnd == GetDesktopWindow()) erase_now( hwnd, rdw_flags | RDW_NOCHILDREN ); |
| |
| /* loop while we find a child to repaint */ |
| for (;;) |
| { |
| UINT flags = UPDATE_PAINT | UPDATE_INTERNALPAINT; |
| |
| if (rdw_flags & RDW_NOCHILDREN) flags |= UPDATE_NOCHILDREN; |
| else if (rdw_flags & RDW_ALLCHILDREN) flags |= UPDATE_ALLCHILDREN; |
| |
| if (!get_update_flags( hwnd, &child, &flags )) break; |
| if (!flags) break; /* nothing more to do */ |
| |
| SendMessageW( child, WM_PAINT, 0, 0 ); |
| if (rdw_flags & RDW_NOCHILDREN) break; |
| } |
| } |
| |
| |
| /************************************************************************* |
| * fix_caret |
| * |
| * Helper for ScrollWindowEx: |
| * If the return value is 0, no special caret handling is necessary. |
| * Otherwise the return value is the handle of the window that owns the |
| * caret. Its caret needs to be hidden during the scroll operation and |
| * moved to new_caret_pos if move_caret is TRUE. |
| */ |
| static HWND fix_caret(HWND hWnd, const RECT *scroll_rect, INT dx, INT dy, |
| UINT flags, LPBOOL move_caret, LPPOINT new_caret_pos) |
| { |
| GUITHREADINFO info; |
| RECT rect, mapped_rcCaret; |
| BOOL hide_caret = FALSE; |
| |
| if (!GetGUIThreadInfo( GetCurrentThreadId(), &info )) return 0; |
| if (!info.hwndCaret) return 0; |
| |
| if (info.hwndCaret == hWnd) |
| { |
| /* Move the caret if it's (partially) in the source rectangle */ |
| if (IntersectRect(&rect, scroll_rect, &info.rcCaret)) |
| { |
| *move_caret = TRUE; |
| hide_caret = TRUE; |
| new_caret_pos->x = info.rcCaret.left + dx; |
| new_caret_pos->y = info.rcCaret.top + dy; |
| } |
| else |
| { |
| *move_caret = FALSE; |
| |
| /* Hide the caret if it's in the destination rectangle */ |
| rect = *scroll_rect; |
| OffsetRect(&rect, dx, dy); |
| hide_caret = IntersectRect(&rect, &rect, &info.rcCaret); |
| } |
| } |
| else |
| { |
| if ((flags & SW_SCROLLCHILDREN) && IsChild(hWnd, info.hwndCaret)) |
| { |
| *move_caret = FALSE; |
| |
| /* Hide the caret if it's in the source or in the destination |
| rectangle */ |
| mapped_rcCaret = info.rcCaret; |
| MapWindowPoints(info.hwndCaret, hWnd, (LPPOINT)&mapped_rcCaret, 2); |
| |
| if (IntersectRect(&rect, scroll_rect, &mapped_rcCaret)) |
| { |
| hide_caret = TRUE; |
| } |
| else |
| { |
| rect = *scroll_rect; |
| OffsetRect(&rect, dx, dy); |
| hide_caret = IntersectRect(&rect, &rect, &mapped_rcCaret); |
| } |
| } |
| else |
| return 0; |
| } |
| |
| if (hide_caret) |
| { |
| HideCaret(info.hwndCaret); |
| return info.hwndCaret; |
| } |
| else |
| return 0; |
| } |
| |
| |
| /*********************************************************************** |
| * BeginPaint (USER32.@) |
| */ |
| HDC WINAPI BeginPaint( HWND hwnd, PAINTSTRUCT *lps ) |
| { |
| HRGN hrgn; |
| UINT flags = UPDATE_NONCLIENT | UPDATE_ERASE | UPDATE_PAINT | UPDATE_INTERNALPAINT | UPDATE_NOCHILDREN; |
| |
| if (!lps) return 0; |
| |
| HideCaret( hwnd ); |
| |
| if (!(hrgn = send_ncpaint( hwnd, NULL, &flags ))) return 0; |
| |
| lps->fErase = send_erase( hwnd, flags, hrgn, &lps->rcPaint, &lps->hdc ); |
| |
| TRACE("hdc = %p box = (%s), fErase = %d\n", |
| lps->hdc, wine_dbgstr_rect(&lps->rcPaint), lps->fErase); |
| |
| return lps->hdc; |
| } |
| |
| |
| /*********************************************************************** |
| * EndPaint (USER32.@) |
| */ |
| BOOL WINAPI EndPaint( HWND hwnd, const PAINTSTRUCT *lps ) |
| { |
| if (!lps) return FALSE; |
| release_dc( hwnd, lps->hdc, TRUE ); |
| ShowCaret( hwnd ); |
| return TRUE; |
| } |
| |
| |
| /*********************************************************************** |
| * GetDCEx (USER32.@) |
| */ |
| HDC WINAPI GetDCEx( HWND hwnd, HRGN hrgnClip, DWORD flags ) |
| { |
| static const DWORD clip_flags = DCX_PARENTCLIP | DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | DCX_WINDOW; |
| struct dce *dce; |
| BOOL bUpdateVisRgn = TRUE; |
| HWND parent; |
| LONG window_style = GetWindowLongW( hwnd, GWL_STYLE ); |
| |
| if (!hwnd) hwnd = GetDesktopWindow(); |
| else hwnd = WIN_GetFullHandle( hwnd ); |
| |
| TRACE("hwnd %p, hrgnClip %p, flags %08x\n", hwnd, hrgnClip, flags); |
| |
| /* fixup flags */ |
| |
| if (flags & (DCX_WINDOW | DCX_PARENTCLIP)) flags |= DCX_CACHE; |
| |
| if (flags & DCX_USESTYLE) |
| { |
| flags &= ~(DCX_CLIPCHILDREN | DCX_CLIPSIBLINGS | DCX_PARENTCLIP); |
| |
| if (window_style & WS_CLIPSIBLINGS) flags |= DCX_CLIPSIBLINGS; |
| |
| if (!(flags & DCX_WINDOW)) |
| { |
| if (GetClassLongW( hwnd, GCL_STYLE ) & CS_PARENTDC) flags |= DCX_PARENTCLIP; |
| |
| if (window_style & WS_CLIPCHILDREN && !(window_style & WS_MINIMIZE)) |
| flags |= DCX_CLIPCHILDREN; |
| } |
| } |
| |
| if (flags & DCX_WINDOW) flags &= ~DCX_CLIPCHILDREN; |
| |
| parent = GetAncestor( hwnd, GA_PARENT ); |
| if (!parent || (parent == GetDesktopWindow())) |
| flags = (flags & ~DCX_PARENTCLIP) | DCX_CLIPSIBLINGS; |
| |
| /* it seems parent clip is ignored when clipping siblings or children */ |
| if (flags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN)) flags &= ~DCX_PARENTCLIP; |
| |
| if( flags & DCX_PARENTCLIP ) |
| { |
| LONG parent_style = GetWindowLongW( parent, GWL_STYLE ); |
| if( (window_style & WS_VISIBLE) && (parent_style & WS_VISIBLE) ) |
| { |
| flags &= ~DCX_CLIPCHILDREN; |
| if (parent_style & WS_CLIPSIBLINGS) flags |= DCX_CLIPSIBLINGS; |
| } |
| } |
| |
| /* find a suitable DCE */ |
| |
| if ((flags & DCX_CACHE) || !(dce = get_window_dce( hwnd ))) |
| { |
| struct dce *dceEmpty = NULL, *dceUnused = NULL; |
| |
| /* Strategy: First, we attempt to find a non-empty but unused DCE with |
| * compatible flags. Next, we look for an empty entry. If the cache is |
| * full we have to purge one of the unused entries. |
| */ |
| USER_Lock(); |
| LIST_FOR_EACH_ENTRY( dce, &dce_list, struct dce, entry ) |
| { |
| if ((dce->flags & DCX_CACHE) && !dce->count) |
| { |
| dceUnused = dce; |
| |
| if (!dce->hwnd) dceEmpty = dce; |
| else if ((dce->hwnd == hwnd) && !((dce->flags ^ flags) & clip_flags)) |
| { |
| TRACE("\tfound valid %p dce [%p], flags %08x\n", |
| dce, hwnd, dce->flags ); |
| bUpdateVisRgn = FALSE; |
| break; |
| } |
| } |
| } |
| |
| if (&dce->entry == &dce_list) /* nothing found */ |
| dce = dceEmpty ? dceEmpty : dceUnused; |
| |
| if (dce) dce->count = 1; |
| |
| USER_Unlock(); |
| |
| /* if there's no dce empty or unused, allocate a new one */ |
| if (!dce) |
| { |
| if (!(dce = alloc_dce())) return 0; |
| dce->flags = DCX_CACHE; |
| USER_Lock(); |
| list_add_head( &dce_list, &dce->entry ); |
| USER_Unlock(); |
| } |
| } |
| else |
| { |
| flags |= DCX_NORESETATTRS; |
| if (dce->hwnd == hwnd) |
| { |
| TRACE("\tskipping hVisRgn update\n"); |
| bUpdateVisRgn = FALSE; /* updated automatically, via DCHook() */ |
| } |
| else |
| { |
| /* we should free dce->clip_rgn here, but Windows apparently doesn't */ |
| dce->flags &= ~(DCX_EXCLUDERGN | DCX_INTERSECTRGN); |
| dce->clip_rgn = 0; |
| } |
| } |
| |
| if (flags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN)) |
| { |
| /* if the extra clip region has changed, get rid of the old one */ |
| if (dce->clip_rgn != hrgnClip || ((flags ^ dce->flags) & (DCX_INTERSECTRGN | DCX_EXCLUDERGN))) |
| delete_clip_rgn( dce ); |
| dce->clip_rgn = hrgnClip; |
| if (!dce->clip_rgn) dce->clip_rgn = CreateRectRgn( 0, 0, 0, 0 ); |
| dce->flags |= flags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN); |
| bUpdateVisRgn = TRUE; |
| } |
| |
| dce->hwnd = hwnd; |
| dce->flags = (dce->flags & ~clip_flags) | (flags & clip_flags); |
| |
| if (SetHookFlags( dce->hdc, DCHF_VALIDATEVISRGN )) bUpdateVisRgn = TRUE; /* DC was dirty */ |
| |
| if (bUpdateVisRgn) update_visible_region( dce ); |
| |
| if (!(flags & DCX_NORESETATTRS)) |
| { |
| RestoreDC( dce->hdc, 1 ); /* initial save level is always 1 */ |
| SaveDC( dce->hdc ); /* save the state again for next time */ |
| } |
| |
| TRACE("(%p,%p,0x%x): returning %p\n", hwnd, hrgnClip, flags, dce->hdc); |
| return dce->hdc; |
| } |
| |
| |
| /*********************************************************************** |
| * GetDC (USER32.@) |
| * |
| * Get a device context. |
| * |
| * RETURNS |
| * Success: Handle to the device context |
| * Failure: NULL. |
| */ |
| HDC WINAPI GetDC( HWND hwnd ) |
| { |
| if (!hwnd) return GetDCEx( 0, 0, DCX_CACHE | DCX_WINDOW ); |
| return GetDCEx( hwnd, 0, DCX_USESTYLE ); |
| } |
| |
| |
| /*********************************************************************** |
| * GetWindowDC (USER32.@) |
| */ |
| HDC WINAPI GetWindowDC( HWND hwnd ) |
| { |
| return GetDCEx( hwnd, 0, DCX_USESTYLE | DCX_WINDOW ); |
| } |
| |
| |
| /*********************************************************************** |
| * ReleaseDC (USER32.@) |
| * |
| * Release a device context. |
| * |
| * RETURNS |
| * Success: Non-zero. Resources used by hdc are released. |
| * Failure: 0. |
| */ |
| INT WINAPI ReleaseDC( HWND hwnd, HDC hdc ) |
| { |
| return release_dc( hwnd, hdc, FALSE ); |
| } |
| |
| |
| /********************************************************************** |
| * WindowFromDC (USER32.@) |
| */ |
| HWND WINAPI WindowFromDC( HDC hdc ) |
| { |
| struct dce *dce; |
| HWND hwnd = 0; |
| |
| USER_Lock(); |
| dce = (struct dce *)GetDCHook( hdc, NULL ); |
| if (dce) hwnd = dce->hwnd; |
| USER_Unlock(); |
| return hwnd; |
| } |
| |
| |
| /*********************************************************************** |
| * LockWindowUpdate (USER32.@) |
| * |
| * Enables or disables painting in the chosen window. |
| * |
| * PARAMS |
| * hwnd [I] handle to a window. |
| * |
| * RETURNS |
| * If successful, returns nonzero value. Otherwise, |
| * returns 0. |
| * |
| * NOTES |
| * You can lock only one window at a time. |
| */ |
| BOOL WINAPI LockWindowUpdate( HWND hwnd ) |
| { |
| static HWND lockedWnd; |
| |
| FIXME("(%p), partial stub!\n",hwnd); |
| |
| USER_Lock(); |
| if (lockedWnd) |
| { |
| if (!hwnd) |
| { |
| /* Unlock lockedWnd */ |
| /* FIXME: Do something */ |
| } |
| else |
| { |
| /* Attempted to lock a second window */ |
| /* Return FALSE and do nothing */ |
| USER_Unlock(); |
| return FALSE; |
| } |
| } |
| lockedWnd = hwnd; |
| USER_Unlock(); |
| return TRUE; |
| } |
| |
| |
| /*********************************************************************** |
| * RedrawWindow (USER32.@) |
| */ |
| BOOL WINAPI RedrawWindow( HWND hwnd, const RECT *rect, HRGN hrgn, UINT flags ) |
| { |
| static const RECT empty; |
| BOOL ret; |
| |
| if (!hwnd) hwnd = GetDesktopWindow(); |
| |
| if (TRACE_ON(win)) |
| { |
| if (hrgn) |
| { |
| RECT r; |
| GetRgnBox( hrgn, &r ); |
| TRACE( "%p region %p box %s ", hwnd, hrgn, wine_dbgstr_rect(&r) ); |
| } |
| else if (rect) |
| TRACE( "%p rect %s ", hwnd, wine_dbgstr_rect(rect) ); |
| else |
| TRACE( "%p whole window ", hwnd ); |
| |
| dump_rdw_flags(flags); |
| } |
| |
| /* process pending expose events before painting */ |
| if (flags & RDW_UPDATENOW) USER_Driver->pMsgWaitForMultipleObjectsEx( 0, NULL, 0, QS_PAINT, 0 ); |
| |
| if (rect && !hrgn) |
| { |
| if (IsRectEmpty( rect )) rect = ∅ |
| ret = redraw_window_rects( hwnd, flags, rect, 1 ); |
| } |
| else if (!hrgn) |
| { |
| ret = redraw_window_rects( hwnd, flags, NULL, 0 ); |
| } |
| else /* need to build a list of the region rectangles */ |
| { |
| DWORD size; |
| RGNDATA *data = NULL; |
| |
| if (!(size = GetRegionData( hrgn, 0, NULL ))) return FALSE; |
| if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return FALSE; |
| GetRegionData( hrgn, size, data ); |
| if (!data->rdh.nCount) /* empty region -> use a single all-zero rectangle */ |
| ret = redraw_window_rects( hwnd, flags, &empty, 1 ); |
| else |
| ret = redraw_window_rects( hwnd, flags, (const RECT *)data->Buffer, data->rdh.nCount ); |
| HeapFree( GetProcessHeap(), 0, data ); |
| } |
| |
| if (flags & RDW_UPDATENOW) update_now( hwnd, flags ); |
| else if (flags & RDW_ERASENOW) erase_now( hwnd, flags ); |
| |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * UpdateWindow (USER32.@) |
| */ |
| BOOL WINAPI UpdateWindow( HWND hwnd ) |
| { |
| return RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_ALLCHILDREN ); |
| } |
| |
| |
| /*********************************************************************** |
| * InvalidateRgn (USER32.@) |
| */ |
| BOOL WINAPI InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase ) |
| { |
| if (!hwnd) |
| { |
| SetLastError( ERROR_INVALID_WINDOW_HANDLE ); |
| return FALSE; |
| } |
| |
| return RedrawWindow(hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) ); |
| } |
| |
| |
| /*********************************************************************** |
| * InvalidateRect (USER32.@) |
| * |
| * MSDN: if hwnd parameter is NULL, InvalidateRect invalidates and redraws |
| * all windows and sends WM_ERASEBKGND and WM_NCPAINT. |
| */ |
| BOOL WINAPI InvalidateRect( HWND hwnd, const RECT *rect, BOOL erase ) |
| { |
| UINT flags = RDW_INVALIDATE | (erase ? RDW_ERASE : 0); |
| |
| if (!hwnd) |
| { |
| flags = RDW_ALLCHILDREN | RDW_INVALIDATE | RDW_FRAME | RDW_ERASE | RDW_ERASENOW; |
| rect = NULL; |
| } |
| |
| return RedrawWindow( hwnd, rect, 0, flags ); |
| } |
| |
| |
| /*********************************************************************** |
| * ValidateRgn (USER32.@) |
| */ |
| BOOL WINAPI ValidateRgn( HWND hwnd, HRGN hrgn ) |
| { |
| if (!hwnd) |
| { |
| SetLastError( ERROR_INVALID_WINDOW_HANDLE ); |
| return FALSE; |
| } |
| |
| return RedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE ); |
| } |
| |
| |
| /*********************************************************************** |
| * ValidateRect (USER32.@) |
| * |
| * MSDN: if hwnd parameter is NULL, ValidateRect invalidates and redraws |
| * all windows and sends WM_ERASEBKGND and WM_NCPAINT. |
| */ |
| BOOL WINAPI ValidateRect( HWND hwnd, const RECT *rect ) |
| { |
| UINT flags = RDW_VALIDATE; |
| |
| if (!hwnd) |
| { |
| flags = RDW_ALLCHILDREN | RDW_INVALIDATE | RDW_FRAME | RDW_ERASE | RDW_ERASENOW; |
| rect = NULL; |
| } |
| |
| return RedrawWindow( hwnd, rect, 0, flags ); |
| } |
| |
| |
| /*********************************************************************** |
| * GetUpdateRgn (USER32.@) |
| */ |
| INT WINAPI GetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase ) |
| { |
| INT retval = ERROR; |
| UINT flags = UPDATE_NOCHILDREN; |
| HRGN update_rgn; |
| |
| if (erase) flags |= UPDATE_NONCLIENT | UPDATE_ERASE; |
| |
| if ((update_rgn = send_ncpaint( hwnd, NULL, &flags ))) |
| { |
| POINT offset; |
| |
| retval = CombineRgn( hrgn, update_rgn, 0, RGN_COPY ); |
| if (send_erase( hwnd, flags, update_rgn, NULL, NULL )) |
| { |
| flags = UPDATE_DELAYED_ERASE; |
| get_update_flags( hwnd, NULL, &flags ); |
| } |
| /* map region to client coordinates */ |
| offset.x = offset.y = 0; |
| ScreenToClient( hwnd, &offset ); |
| OffsetRgn( hrgn, offset.x, offset.y ); |
| } |
| return retval; |
| } |
| |
| |
| /*********************************************************************** |
| * GetUpdateRect (USER32.@) |
| */ |
| BOOL WINAPI GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase ) |
| { |
| UINT flags = UPDATE_NOCHILDREN; |
| HRGN update_rgn; |
| BOOL need_erase; |
| |
| if (erase) flags |= UPDATE_NONCLIENT | UPDATE_ERASE; |
| |
| if (!(update_rgn = send_ncpaint( hwnd, NULL, &flags ))) return FALSE; |
| |
| if (rect) |
| { |
| if (GetRgnBox( update_rgn, rect ) != NULLREGION) |
| { |
| HDC hdc = GetDCEx( hwnd, 0, DCX_USESTYLE ); |
| MapWindowPoints( 0, hwnd, (LPPOINT)rect, 2 ); |
| DPtoLP( hdc, (LPPOINT)rect, 2 ); |
| ReleaseDC( hwnd, hdc ); |
| } |
| } |
| need_erase = send_erase( hwnd, flags, update_rgn, NULL, NULL ); |
| |
| /* check if we still have an update region */ |
| flags = UPDATE_PAINT | UPDATE_NOCHILDREN; |
| if (need_erase) flags |= UPDATE_DELAYED_ERASE; |
| return (get_update_flags( hwnd, NULL, &flags ) && (flags & UPDATE_PAINT)); |
| } |
| |
| |
| /*********************************************************************** |
| * ExcludeUpdateRgn (USER32.@) |
| */ |
| INT WINAPI ExcludeUpdateRgn( HDC hdc, HWND hwnd ) |
| { |
| HRGN update_rgn = CreateRectRgn( 0, 0, 0, 0 ); |
| INT ret = GetUpdateRgn( hwnd, update_rgn, FALSE ); |
| |
| if (ret != ERROR) |
| { |
| POINT pt; |
| |
| GetDCOrgEx( hdc, &pt ); |
| MapWindowPoints( 0, hwnd, &pt, 1 ); |
| OffsetRgn( update_rgn, -pt.x, -pt.y ); |
| ret = ExtSelectClipRgn( hdc, update_rgn, RGN_DIFF ); |
| DeleteObject( update_rgn ); |
| } |
| return ret; |
| } |
| |
| |
| /************************************************************************* |
| * ScrollWindowEx (USER32.@) |
| * |
| * Note: contrary to what the doc says, pixels that are scrolled from the |
| * outside of clipRect to the inside are NOT painted. |
| * |
| */ |
| INT WINAPI ScrollWindowEx( HWND hwnd, INT dx, INT dy, |
| const RECT *rect, const RECT *clipRect, |
| HRGN hrgnUpdate, LPRECT rcUpdate, |
| UINT flags ) |
| { |
| INT retVal = NULLREGION; |
| BOOL bOwnRgn = TRUE; |
| BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE)); |
| int rdw_flags; |
| HRGN hrgnTemp; |
| HRGN hrgnWinupd = 0; |
| HDC hDC; |
| RECT rc, cliprc; |
| HWND hwndCaret = NULL; |
| BOOL moveCaret = FALSE; |
| POINT newCaretPos; |
| |
| TRACE( "%p, %d,%d hrgnUpdate=%p rcUpdate = %p %s %04x\n", |
| hwnd, dx, dy, hrgnUpdate, rcUpdate, wine_dbgstr_rect(rect), flags ); |
| TRACE( "clipRect = %s\n", wine_dbgstr_rect(clipRect)); |
| if( flags & ~( SW_SCROLLCHILDREN | SW_INVALIDATE | SW_ERASE)) |
| FIXME("some flags (%04x) are unhandled\n", flags); |
| |
| rdw_flags = (flags & SW_ERASE) && (flags & SW_INVALIDATE) ? |
| RDW_INVALIDATE | RDW_ERASE : RDW_INVALIDATE ; |
| |
| if (!WIN_IsWindowDrawable( hwnd, TRUE )) return ERROR; |
| hwnd = WIN_GetFullHandle( hwnd ); |
| |
| GetClientRect(hwnd, &rc); |
| |
| if (clipRect) IntersectRect(&cliprc,&rc,clipRect); |
| else cliprc = rc; |
| |
| if (rect) IntersectRect(&rc, &rc, rect); |
| |
| if( hrgnUpdate ) bOwnRgn = FALSE; |
| else if( bUpdate ) hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 ); |
| |
| newCaretPos.x = newCaretPos.y = 0; |
| |
| if( !IsRectEmpty(&cliprc) && (dx || dy)) { |
| DWORD dcxflags = DCX_CACHE; |
| DWORD style = GetWindowLongW( hwnd, GWL_STYLE ); |
| |
| hwndCaret = fix_caret(hwnd, &rc, dx, dy, flags, &moveCaret, &newCaretPos); |
| |
| if( style & WS_CLIPSIBLINGS) dcxflags |= DCX_CLIPSIBLINGS; |
| if( GetClassLongW( hwnd, GCL_STYLE ) & CS_PARENTDC) |
| dcxflags |= DCX_PARENTCLIP; |
| if( !(flags & SW_SCROLLCHILDREN) && (style & WS_CLIPCHILDREN)) |
| dcxflags |= DCX_CLIPCHILDREN; |
| hDC = GetDCEx( hwnd, 0, dcxflags); |
| if (hDC) |
| { |
| ScrollDC( hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate ); |
| |
| ReleaseDC( hwnd, hDC ); |
| |
| if (!bUpdate) |
| RedrawWindow( hwnd, NULL, hrgnUpdate, rdw_flags); |
| } |
| |
| /* If the windows has an update region, this must be |
| * scrolled as well. Keep a copy in hrgnWinupd |
| * to be added to hrngUpdate at the end. */ |
| hrgnTemp = CreateRectRgn( 0, 0, 0, 0 ); |
| retVal = GetUpdateRgn( hwnd, hrgnTemp, FALSE ); |
| if (retVal != NULLREGION) |
| { |
| HRGN hrgnClip = CreateRectRgnIndirect(&cliprc); |
| if( !bOwnRgn) { |
| hrgnWinupd = CreateRectRgn( 0, 0, 0, 0); |
| CombineRgn( hrgnWinupd, hrgnTemp, 0, RGN_COPY); |
| } |
| OffsetRgn( hrgnTemp, dx, dy ); |
| CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND ); |
| if( !bOwnRgn) |
| CombineRgn( hrgnWinupd, hrgnWinupd, hrgnTemp, RGN_OR ); |
| RedrawWindow( hwnd, NULL, hrgnTemp, rdw_flags); |
| |
| /* Catch the case where the scrolling amount exceeds the size of the |
| * original window. This generated a second update area that is the |
| * location where the original scrolled content would end up. |
| * This second region is not returned by the ScrollDC and sets |
| * ScrollWindowEx apart from just a ScrollDC. |
| * |
| * This has been verified with testing on windows. |
| */ |
| if (abs(dx) > abs(rc.right - rc.left) || |
| abs(dy) > abs(rc.bottom - rc.top)) |
| { |
| SetRectRgn( hrgnTemp, rc.left + dx, rc.top + dy, rc.right+dx, rc.bottom + dy); |
| CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND ); |
| CombineRgn( hrgnUpdate, hrgnUpdate, hrgnTemp, RGN_OR ); |
| |
| if( !bOwnRgn) |
| CombineRgn( hrgnWinupd, hrgnWinupd, hrgnTemp, RGN_OR ); |
| } |
| DeleteObject( hrgnClip ); |
| } |
| DeleteObject( hrgnTemp ); |
| } else { |
| /* nothing was scrolled */ |
| if( !bOwnRgn) |
| SetRectRgn( hrgnUpdate, 0, 0, 0, 0 ); |
| SetRectEmpty( rcUpdate); |
| } |
| |
| if( flags & SW_SCROLLCHILDREN ) |
| { |
| HWND *list = WIN_ListChildren( hwnd ); |
| if (list) |
| { |
| int i; |
| RECT r, dummy; |
| for (i = 0; list[i]; i++) |
| { |
| GetWindowRect( list[i], &r ); |
| MapWindowPoints( 0, hwnd, (POINT *)&r, 2 ); |
| if (!rect || IntersectRect(&dummy, &r, rect)) |
| SetWindowPos( list[i], 0, r.left + dx, r.top + dy, 0, 0, |
| SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE | |
| SWP_NOREDRAW | SWP_DEFERERASE ); |
| } |
| HeapFree( GetProcessHeap(), 0, list ); |
| } |
| } |
| |
| if( flags & (SW_INVALIDATE | SW_ERASE) ) |
| RedrawWindow( hwnd, NULL, hrgnUpdate, rdw_flags | |
| ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0 ) ); |
| |
| if( hrgnWinupd) { |
| CombineRgn( hrgnUpdate, hrgnUpdate, hrgnWinupd, RGN_OR); |
| DeleteObject( hrgnWinupd); |
| } |
| |
| if( hwndCaret ) { |
| if ( moveCaret ) SetCaretPos( newCaretPos.x, newCaretPos.y ); |
| ShowCaret(hwndCaret); |
| } |
| |
| if( bOwnRgn && hrgnUpdate ) DeleteObject( hrgnUpdate ); |
| |
| return retVal; |
| } |
| |
| |
| /************************************************************************* |
| * ScrollWindow (USER32.@) |
| * |
| */ |
| BOOL WINAPI ScrollWindow( HWND hwnd, INT dx, INT dy, |
| const RECT *rect, const RECT *clipRect ) |
| { |
| return (ERROR != ScrollWindowEx( hwnd, dx, dy, rect, clipRect, 0, NULL, |
| (rect ? 0 : SW_SCROLLCHILDREN) | |
| SW_INVALIDATE | SW_ERASE )); |
| } |
| |
| |
| /************************************************************************* |
| * ScrollDC (USER32.@) |
| * |
| * dx, dy, lprcScroll and lprcClip are all in logical coordinates (msdn is |
| * wrong) hrgnUpdate is returned in device coordinates with rcUpdate in |
| * logical coordinates. |
| */ |
| BOOL WINAPI ScrollDC( HDC hdc, INT dx, INT dy, const RECT *lprcScroll, |
| const RECT *lprcClip, HRGN hrgnUpdate, LPRECT lprcUpdate ) |
| |
| { |
| return USER_Driver->pScrollDC( hdc, dx, dy, lprcScroll, lprcClip, hrgnUpdate, lprcUpdate ); |
| } |
| |
| /************************************************************************ |
| * PrintWindow (USER32.@) |
| * |
| */ |
| BOOL WINAPI PrintWindow(HWND hwnd, HDC hdcBlt, UINT nFlags) |
| { |
| UINT flags = PRF_CHILDREN | PRF_ERASEBKGND | PRF_OWNED | PRF_CLIENT; |
| if(!(nFlags & PW_CLIENTONLY)) |
| { |
| flags |= PRF_NONCLIENT; |
| } |
| SendMessageW(hwnd, WM_PRINT, (WPARAM)hdcBlt, flags); |
| return TRUE; |
| } |
