/* * Server-side window handling * * Copyright (C) 2001 Alexandre Julliard * * 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 "ntstatus.h" #define WIN32_NO_STATUS #include "windef.h" #include "winbase.h" #include "wingdi.h" #include "winuser.h" #include "winternl.h" #include "object.h" #include "request.h" #include "thread.h" #include "process.h" #include "user.h" #include "unicode.h" /* a window property */ struct property { unsigned short type; /* property type (see below) */ atom_t atom; /* property atom */ lparam_t data; /* property data (user-defined storage) */ }; enum property_type { PROP_TYPE_FREE, /* free entry */ PROP_TYPE_STRING, /* atom that was originally a string */ PROP_TYPE_ATOM /* plain atom */ }; struct window { struct window *parent; /* parent window */ user_handle_t owner; /* owner of this window */ struct list children; /* list of children in Z-order */ struct list unlinked; /* list of children not linked in the Z-order list */ struct list entry; /* entry in parent's children list */ user_handle_t handle; /* full handle for this window */ struct thread *thread; /* thread owning the window */ struct desktop *desktop; /* desktop that the window belongs to */ struct window_class *class; /* window class */ atom_t atom; /* class atom */ user_handle_t last_active; /* last active popup */ rectangle_t window_rect; /* window rectangle (relative to parent client area) */ rectangle_t visible_rect; /* visible part of window rect (relative to parent client area) */ rectangle_t client_rect; /* client rectangle (relative to parent client area) */ struct region *win_region; /* region for shaped windows (relative to window rect) */ struct region *update_region; /* update region (relative to window rect) */ unsigned int style; /* window style */ unsigned int ex_style; /* window extended style */ unsigned int id; /* window id */ mod_handle_t instance; /* creator instance */ unsigned int is_unicode : 1; /* ANSI or unicode */ unsigned int is_linked : 1; /* is it linked into the parent z-order list? */ unsigned int is_layered : 1; /* has layered info been set? */ unsigned int color_key; /* color key for a layered window */ unsigned int alpha; /* alpha value for a layered window */ unsigned int layered_flags; /* flags for a layered window */ lparam_t user_data; /* user-specific data */ WCHAR *text; /* window caption text */ unsigned int paint_flags; /* various painting flags */ int prop_inuse; /* number of in-use window properties */ int prop_alloc; /* number of allocated window properties */ struct property *properties; /* window properties array */ int nb_extra_bytes; /* number of extra bytes */ char extra_bytes[1]; /* extra bytes storage */ }; #define PAINT_INTERNAL 0x01 /* internal WM_PAINT pending */ #define PAINT_ERASE 0x02 /* needs WM_ERASEBKGND */ #define PAINT_NONCLIENT 0x04 /* needs WM_NCPAINT */ #define PAINT_DELAYED_ERASE 0x08 /* still needs erase after WM_ERASEBKGND */ /* growable array of user handles */ struct user_handle_array { user_handle_t *handles; int count; int total; }; /* global window pointers */ static struct window *shell_window; static struct window *shell_listview; static struct window *progman_window; static struct window *taskman_window; /* magic HWND_TOP etc. pointers */ #define WINPTR_TOP ((struct window *)1L) #define WINPTR_BOTTOM ((struct window *)2L) #define WINPTR_TOPMOST ((struct window *)3L) #define WINPTR_NOTOPMOST ((struct window *)4L) /* retrieve a pointer to a window from its handle */ static inline struct window *get_window( user_handle_t handle ) { struct window *ret = get_user_object( handle, USER_WINDOW ); if (!ret) set_win32_error( ERROR_INVALID_WINDOW_HANDLE ); return ret; } /* check if window is the desktop */ static inline int is_desktop_window( const struct window *win ) { return !win->parent; /* only desktop windows have no parent */ } /* get next window in Z-order list */ static inline struct window *get_next_window( struct window *win ) { struct list *ptr = list_next( &win->parent->children, &win->entry ); return ptr ? LIST_ENTRY( ptr, struct window, entry ) : NULL; } /* get previous window in Z-order list */ static inline struct window *get_prev_window( struct window *win ) { struct list *ptr = list_prev( &win->parent->children, &win->entry ); return ptr ? LIST_ENTRY( ptr, struct window, entry ) : NULL; } /* get first child in Z-order list */ static inline struct window *get_first_child( struct window *win ) { struct list *ptr = list_head( &win->children ); return ptr ? LIST_ENTRY( ptr, struct window, entry ) : NULL; } /* get last child in Z-order list */ static inline struct window *get_last_child( struct window *win ) { struct list *ptr = list_tail( &win->children ); return ptr ? LIST_ENTRY( ptr, struct window, entry ) : NULL; } /* link a window at the right place in the siblings list */ static void link_window( struct window *win, struct window *previous ) { if (previous == WINPTR_NOTOPMOST) { if (!(win->ex_style & WS_EX_TOPMOST) && win->is_linked) return; /* nothing to do */ win->ex_style &= ~WS_EX_TOPMOST; previous = WINPTR_TOP; /* fallback to the HWND_TOP case */ } list_remove( &win->entry ); /* unlink it from the previous location */ if (previous == WINPTR_BOTTOM) { list_add_tail( &win->parent->children, &win->entry ); win->ex_style &= ~WS_EX_TOPMOST; } else if (previous == WINPTR_TOPMOST) { list_add_head( &win->parent->children, &win->entry ); win->ex_style |= WS_EX_TOPMOST; } else if (previous == WINPTR_TOP) { struct list *entry = win->parent->children.next; if (!(win->ex_style & WS_EX_TOPMOST)) /* put it above the first non-topmost window */ { while (entry != &win->parent->children) { struct window *next = LIST_ENTRY( entry, struct window, entry ); if (!(next->ex_style & WS_EX_TOPMOST)) break; if (next->handle == win->owner) /* keep it above owner */ { win->ex_style |= WS_EX_TOPMOST; break; } entry = entry->next; } } list_add_before( entry, &win->entry ); } else { list_add_after( &previous->entry, &win->entry ); if (!(previous->ex_style & WS_EX_TOPMOST)) win->ex_style &= ~WS_EX_TOPMOST; else { struct window *next = get_next_window( win ); if (next && (next->ex_style & WS_EX_TOPMOST)) win->ex_style |= WS_EX_TOPMOST; } } win->is_linked = 1; } /* change the parent of a window (or unlink the window if the new parent is NULL) */ static int set_parent_window( struct window *win, struct window *parent ) { struct window *ptr; /* make sure parent is not a child of window */ for (ptr = parent; ptr; ptr = ptr->parent) { if (ptr == win) { set_error( STATUS_INVALID_PARAMETER ); return 0; } } if (parent) { win->parent = parent; link_window( win, WINPTR_TOP ); /* if parent belongs to a different thread and the window isn't */ /* top-level, attach the two threads */ if (parent->thread && parent->thread != win->thread && !is_desktop_window(parent)) attach_thread_input( win->thread, parent->thread ); } else /* move it to parent unlinked list */ { list_remove( &win->entry ); /* unlink it from the previous location */ list_add_head( &win->parent->unlinked, &win->entry ); win->is_linked = 0; } return 1; } /* append a user handle to a handle array */ static int add_handle_to_array( struct user_handle_array *array, user_handle_t handle ) { if (array->count >= array->total) { int new_total = max( array->total * 2, 32 ); user_handle_t *new_array = realloc( array->handles, new_total * sizeof(*new_array) ); if (!new_array) { free( array->handles ); set_error( STATUS_NO_MEMORY ); return 0; } array->handles = new_array; array->total = new_total; } array->handles[array->count++] = handle; return 1; } /* set a window property */ static void set_property( struct window *win, atom_t atom, lparam_t data, enum property_type type ) { int i, free = -1; struct property *new_props; /* check if it exists already */ for (i = 0; i < win->prop_inuse; i++) { if (win->properties[i].type == PROP_TYPE_FREE) { free = i; continue; } if (win->properties[i].atom == atom) { win->properties[i].type = type; win->properties[i].data = data; return; } } /* need to add an entry */ if (!grab_global_atom( NULL, atom )) return; if (free == -1) { /* no free entry */ if (win->prop_inuse >= win->prop_alloc) { /* need to grow the array */ if (!(new_props = realloc( win->properties, sizeof(*new_props) * (win->prop_alloc + 16) ))) { set_error( STATUS_NO_MEMORY ); release_global_atom( NULL, atom ); return; } win->prop_alloc += 16; win->properties = new_props; } free = win->prop_inuse++; } win->properties[free].atom = atom; win->properties[free].type = type; win->properties[free].data = data; } /* remove a window property */ static lparam_t remove_property( struct window *win, atom_t atom ) { int i; for (i = 0; i < win->prop_inuse; i++) { if (win->properties[i].type == PROP_TYPE_FREE) continue; if (win->properties[i].atom == atom) { release_global_atom( NULL, atom ); win->properties[i].type = PROP_TYPE_FREE; return win->properties[i].data; } } /* FIXME: last error? */ return 0; } /* find a window property */ static lparam_t get_property( struct window *win, atom_t atom ) { int i; for (i = 0; i < win->prop_inuse; i++) { if (win->properties[i].type == PROP_TYPE_FREE) continue; if (win->properties[i].atom == atom) return win->properties[i].data; } /* FIXME: last error? */ return 0; } /* destroy all properties of a window */ static inline void destroy_properties( struct window *win ) { int i; if (!win->properties) return; for (i = 0; i < win->prop_inuse; i++) { if (win->properties[i].type == PROP_TYPE_FREE) continue; release_global_atom( NULL, win->properties[i].atom ); } free( win->properties ); } /* detach a window from its owner thread but keep the window around */ static void detach_window_thread( struct window *win ) { struct thread *thread = win->thread; if (!thread) return; if (thread->queue) { if (win->update_region) inc_queue_paint_count( thread, -1 ); if (win->paint_flags & PAINT_INTERNAL) inc_queue_paint_count( thread, -1 ); queue_cleanup_window( thread, win->handle ); } assert( thread->desktop_users > 0 ); thread->desktop_users--; release_class( win->class ); win->class = NULL; /* don't hold a reference to the desktop so that the desktop window can be */ /* destroyed when the desktop ref count reaches zero */ release_object( win->desktop ); win->thread = NULL; } /* get the process owning the top window of a given desktop */ struct process *get_top_window_owner( struct desktop *desktop ) { struct window *win = desktop->top_window; if (!win || !win->thread) return NULL; return win->thread->process; } /* get the top window size of a given desktop */ void get_top_window_rectangle( struct desktop *desktop, rectangle_t *rect ) { struct window *win = desktop->top_window; if (!win) rect->left = rect->top = rect->right = rect->bottom = 0; else *rect = win->window_rect; } /* post a message to the desktop window */ void post_desktop_message( struct desktop *desktop, unsigned int message, lparam_t wparam, lparam_t lparam ) { struct window *win = desktop->top_window; if (win && win->thread) post_message( win->handle, message, wparam, lparam ); } /* create a new window structure (note: the window is not linked in the window tree) */ static struct window *create_window( struct window *parent, struct window *owner, atom_t atom, mod_handle_t instance ) { static const rectangle_t empty_rect; int extra_bytes; struct window *win = NULL; struct desktop *desktop; struct window_class *class; if (!(desktop = get_thread_desktop( current, DESKTOP_CREATEWINDOW ))) return NULL; if (!(class = grab_class( current->process, atom, instance, &extra_bytes ))) { release_object( desktop ); return NULL; } if (!parent) /* null parent is only allowed for desktop or HWND_MESSAGE top window */ { if (is_desktop_class( class )) parent = desktop->top_window; /* use existing desktop if any */ else if (is_hwnd_message_class( class )) /* use desktop window if message window is already created */ parent = desktop->msg_window ? desktop->top_window : NULL; else if (!(parent = desktop->top_window)) /* must already have a desktop then */ { set_error( STATUS_ACCESS_DENIED ); goto failed; } } /* parent must be on the same desktop */ if (parent && parent->desktop != desktop) { set_error( STATUS_ACCESS_DENIED ); goto failed; } if (!(win = mem_alloc( sizeof(*win) + extra_bytes - 1 ))) goto failed; if (!(win->handle = alloc_user_handle( win, USER_WINDOW ))) goto failed; win->parent = parent; win->owner = owner ? owner->handle : 0; win->thread = current; win->desktop = desktop; win->class = class; win->atom = atom; win->last_active = win->handle; win->win_region = NULL; win->update_region = NULL; win->style = 0; win->ex_style = 0; win->id = 0; win->instance = 0; win->is_unicode = 1; win->is_linked = 0; win->is_layered = 0; win->user_data = 0; win->text = NULL; win->paint_flags = 0; win->prop_inuse = 0; win->prop_alloc = 0; win->properties = NULL; win->nb_extra_bytes = extra_bytes; win->window_rect = win->visible_rect = win->client_rect = empty_rect; memset( win->extra_bytes, 0, extra_bytes ); list_init( &win->children ); list_init( &win->unlinked ); /* if parent belongs to a different thread and the window isn't */ /* top-level, attach the two threads */ if (parent && parent->thread && parent->thread != current && !is_desktop_window(parent)) { if (!attach_thread_input( current, parent->thread )) goto failed; } else /* otherwise just make sure that the thread has a message queue */ { if (!current->queue && !init_thread_queue( current )) goto failed; } /* put it on parent unlinked list */ if (parent) list_add_head( &parent->unlinked, &win->entry ); else { list_init( &win->entry ); if (is_desktop_class( class )) { assert( !desktop->top_window ); desktop->top_window = win; set_process_default_desktop( current->process, desktop, current->desktop ); } else { assert( !desktop->msg_window ); desktop->msg_window = win; } } current->desktop_users++; return win; failed: if (win) { if (win->handle) free_user_handle( win->handle ); free( win ); } release_object( desktop ); release_class( class ); return NULL; } /* destroy all windows belonging to a given thread */ void destroy_thread_windows( struct thread *thread ) { user_handle_t handle = 0; struct window *win; while ((win = next_user_handle( &handle, USER_WINDOW ))) { if (win->thread != thread) continue; if (is_desktop_window( win )) detach_window_thread( win ); else destroy_window( win ); } } /* get the desktop window */ static struct window *get_desktop_window( struct thread *thread ) { struct window *top_window; struct desktop *desktop = get_thread_desktop( thread, 0 ); if (!desktop) return NULL; top_window = desktop->top_window; release_object( desktop ); return top_window; } /* check whether child is a descendant of parent */ int is_child_window( user_handle_t parent, user_handle_t child ) { struct window *child_ptr = get_user_object( child, USER_WINDOW ); struct window *parent_ptr = get_user_object( parent, USER_WINDOW ); if (!child_ptr || !parent_ptr) return 0; while (child_ptr->parent) { if (child_ptr->parent == parent_ptr) return 1; child_ptr = child_ptr->parent; } return 0; } /* check whether window is a top-level window */ int is_top_level_window( user_handle_t window ) { struct window *win = get_user_object( window, USER_WINDOW ); return (win && (is_desktop_window(win) || is_desktop_window(win->parent))); } /* make a window active if possible */ int make_window_active( user_handle_t window ) { struct window *owner, *win = get_window( window ); if (!win) return 0; /* set last active for window and its owners */ owner = win; while (owner) { owner->last_active = win->handle; owner = get_user_object( owner->owner, USER_WINDOW ); } return 1; } /* increment (or decrement) the window paint count */ static inline void inc_window_paint_count( struct window *win, int incr ) { if (win->thread) inc_queue_paint_count( win->thread, incr ); } /* check if window and all its ancestors are visible */ static int is_visible( const struct window *win ) { while (win) { if (!(win->style & WS_VISIBLE)) return 0; win = win->parent; /* if parent is minimized children are not visible */ if (win && (win->style & WS_MINIMIZE)) return 0; } return 1; } /* same as is_visible but takes a window handle */ int is_window_visible( user_handle_t window ) { struct window *win = get_user_object( window, USER_WINDOW ); if (!win) return 0; return is_visible( win ); } int is_window_transparent( user_handle_t window ) { struct window *win = get_user_object( window, USER_WINDOW ); if (!win) return 0; return (win->ex_style & (WS_EX_LAYERED|WS_EX_TRANSPARENT)) == (WS_EX_LAYERED|WS_EX_TRANSPARENT); } /* check if point is inside the window */ static inline int is_point_in_window( struct window *win, int x, int y ) { if (!(win->style & WS_VISIBLE)) return 0; /* not visible */ if ((win->style & (WS_POPUP|WS_CHILD|WS_DISABLED)) == (WS_CHILD|WS_DISABLED)) return 0; /* disabled child */ if ((win->ex_style & (WS_EX_LAYERED|WS_EX_TRANSPARENT)) == (WS_EX_LAYERED|WS_EX_TRANSPARENT)) return 0; /* transparent */ if (x < win->visible_rect.left || x >= win->visible_rect.right || y < win->visible_rect.top || y >= win->visible_rect.bottom) return 0; /* not in window */ if (win->win_region && !point_in_region( win->win_region, x - win->window_rect.left, y - win->window_rect.top )) return 0; /* not in window region */ return 1; } /* fill an array with the handles of the children of a specified window */ static unsigned int get_children_windows( struct window *parent, atom_t atom, thread_id_t tid, user_handle_t *handles, unsigned int max_count ) { struct window *ptr; unsigned int count = 0; if (!parent) return 0; LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry ) { if (atom && get_class_atom(ptr->class) != atom) continue; if (tid && get_thread_id(ptr->thread) != tid) continue; if (handles) { if (count >= max_count) break; handles[count] = ptr->handle; } count++; } return count; } /* find child of 'parent' that contains the given point (in parent-relative coords) */ static struct window *child_window_from_point( struct window *parent, int x, int y ) { struct window *ptr; LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry ) { if (!is_point_in_window( ptr, x, y )) continue; /* skip it */ /* if window is minimized or disabled, return at once */ if (ptr->style & (WS_MINIMIZE|WS_DISABLED)) return ptr; /* if point is not in client area, return at once */ if (x < ptr->client_rect.left || x >= ptr->client_rect.right || y < ptr->client_rect.top || y >= ptr->client_rect.bottom) return ptr; return child_window_from_point( ptr, x - ptr->client_rect.left, y - ptr->client_rect.top ); } return parent; /* not found any child */ } /* find all children of 'parent' that contain the given point */ static int get_window_children_from_point( struct window *parent, int x, int y, struct user_handle_array *array ) { struct window *ptr; LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry ) { if (!is_point_in_window( ptr, x, y )) continue; /* skip it */ /* if point is in client area, and window is not minimized or disabled, check children */ if (!(ptr->style & (WS_MINIMIZE|WS_DISABLED)) && x >= ptr->client_rect.left && x < ptr->client_rect.right && y >= ptr->client_rect.top && y < ptr->client_rect.bottom) { if (!get_window_children_from_point( ptr, x - ptr->client_rect.left, y - ptr->client_rect.top, array )) return 0; } /* now add window to the array */ if (!add_handle_to_array( array, ptr->handle )) return 0; } return 1; } /* find window containing point (in absolute coords) */ user_handle_t window_from_point( struct desktop *desktop, int x, int y ) { struct window *ret; if (!desktop->top_window) return 0; ret = child_window_from_point( desktop->top_window, x, y ); return ret->handle; } /* return list of all windows containing point (in absolute coords) */ static int all_windows_from_point( struct window *top, int x, int y, struct user_handle_array *array ) { struct window *ptr; /* make point relative to top window */ for (ptr = top->parent; ptr && !is_desktop_window(ptr); ptr = ptr->parent) { x -= ptr->client_rect.left; y -= ptr->client_rect.top; } if (!is_point_in_window( top, x, y )) return 1; /* if point is in client area, and window is not minimized or disabled, check children */ if (!(top->style & (WS_MINIMIZE|WS_DISABLED)) && x >= top->client_rect.left && x < top->client_rect.right && y >= top->client_rect.top && y < top->client_rect.bottom) { if (!is_desktop_window(top)) { x -= top->client_rect.left; y -= top->client_rect.top; } if (!get_window_children_from_point( top, x, y, array )) return 0; } /* now add window to the array */ if (!add_handle_to_array( array, top->handle )) return 0; return 1; } /* return the thread owning a window */ struct thread *get_window_thread( user_handle_t handle ) { struct window *win = get_user_object( handle, USER_WINDOW ); if (!win || !win->thread) return NULL; return (struct thread *)grab_object( win->thread ); } /* check if any area of a window needs repainting */ static inline int win_needs_repaint( struct window *win ) { return win->update_region || (win->paint_flags & PAINT_INTERNAL); } /* find a child of the specified window that needs repainting */ static struct window *find_child_to_repaint( struct window *parent, struct thread *thread ) { struct window *ptr, *ret = NULL; LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry ) { if (!(ptr->style & WS_VISIBLE)) continue; if (ptr->thread == thread && win_needs_repaint( ptr )) ret = ptr; else if (!(ptr->style & WS_MINIMIZE)) /* explore its children */ ret = find_child_to_repaint( ptr, thread ); if (ret) break; } if (ret && (ret->ex_style & WS_EX_TRANSPARENT)) { /* transparent window, check for non-transparent sibling to paint first */ for (ptr = get_next_window(ret); ptr; ptr = get_next_window(ptr)) { if (!(ptr->style & WS_VISIBLE)) continue; if (ptr->ex_style & WS_EX_TRANSPARENT) continue; if (ptr->thread != thread) continue; if (win_needs_repaint( ptr )) return ptr; } } return ret; } /* find a window that needs to receive a WM_PAINT; also clear its internal paint flag */ user_handle_t find_window_to_repaint( user_handle_t parent, struct thread *thread ) { struct window *ptr, *win, *top_window = get_desktop_window( thread ); if (!top_window) return 0; if (top_window->thread == thread && win_needs_repaint( top_window )) win = top_window; else win = find_child_to_repaint( top_window, thread ); if (win && parent) { /* check that it is a child of the specified parent */ for (ptr = win; ptr; ptr = ptr->parent) if (ptr->handle == parent) break; /* otherwise don't return any window, we don't repaint a child before its parent */ if (!ptr) win = NULL; } if (!win) return 0; win->paint_flags &= ~PAINT_INTERNAL; return win->handle; } /* intersect the window region with the specified region, relative to the window parent */ static struct region *intersect_window_region( struct region *region, struct window *win ) { /* make region relative to window rect */ offset_region( region, -win->window_rect.left, -win->window_rect.top ); if (!intersect_region( region, region, win->win_region )) return NULL; /* make region relative to parent again */ offset_region( region, win->window_rect.left, win->window_rect.top ); return region; } /* convert coordinates from client to screen coords */ static inline void client_to_screen( struct window *win, int *x, int *y ) { for ( ; win && !is_desktop_window(win); win = win->parent) { *x += win->client_rect.left; *y += win->client_rect.top; } } /* convert coordinates from client to screen coords */ static inline void client_to_screen_rect( struct window *win, rectangle_t *rect ) { for ( ; win && !is_desktop_window(win); win = win->parent) { rect->left += win->client_rect.left; rect->right += win->client_rect.left; rect->top += win->client_rect.top; rect->bottom += win->client_rect.top; } } /* map the region from window to screen coordinates */ static inline void map_win_region_to_screen( struct window *win, struct region *region ) { if (!is_desktop_window(win)) { int x = win->window_rect.left; int y = win->window_rect.top; client_to_screen( win->parent, &x, &y ); offset_region( region, x, y ); } } /* clip all children of a given window out of the visible region */ static struct region *clip_children( struct window *parent, struct window *last, struct region *region, int offset_x, int offset_y ) { struct window *ptr; struct region *tmp = create_empty_region(); if (!tmp) return NULL; LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry ) { if (ptr == last) break; if (!(ptr->style & WS_VISIBLE)) continue; if (ptr->ex_style & WS_EX_TRANSPARENT) continue; set_region_rect( tmp, &ptr->visible_rect ); if (ptr->win_region && !intersect_window_region( tmp, ptr )) { free_region( tmp ); return NULL; } offset_region( tmp, offset_x, offset_y ); if (!(region = subtract_region( region, region, tmp ))) break; if (is_region_empty( region )) break; } free_region( tmp ); return region; } /* offset the coordinates of a rectangle */ static inline void offset_rect( rectangle_t *rect, int offset_x, int offset_y ) { rect->left += offset_x; rect->top += offset_y; rect->right += offset_x; rect->bottom += offset_y; } /* set the region to the client rect clipped by the window rect, in parent-relative coordinates */ static void set_region_client_rect( struct region *region, struct window *win ) { rectangle_t rect; intersect_rect( &rect, &win->window_rect, &win->client_rect ); set_region_rect( region, &rect ); } /* get the top-level window to clip against for a given window */ static inline struct window *get_top_clipping_window( struct window *win ) { while (win->parent && !is_desktop_window(win->parent)) win = win->parent; return win; } /* compute the visible region of a window, in window coordinates */ static struct region *get_visible_region( struct window *win, unsigned int flags ) { struct region *tmp = NULL, *region; int offset_x, offset_y; if (!(region = create_empty_region())) return NULL; /* first check if all ancestors are visible */ if (!is_visible( win )) return region; /* empty region */ /* create a region relative to the window itself */ if ((flags & DCX_PARENTCLIP) && win->parent && !is_desktop_window(win->parent)) { set_region_client_rect( region, win->parent ); offset_region( region, -win->parent->client_rect.left, -win->parent->client_rect.top ); } else if (flags & DCX_WINDOW) { set_region_rect( region, &win->visible_rect ); if (win->win_region && !intersect_window_region( region, win )) goto error; } else { set_region_client_rect( region, win ); if (win->win_region && !intersect_window_region( region, win )) goto error; } /* clip children */ if (flags & DCX_CLIPCHILDREN) { if (is_desktop_window(win)) offset_x = offset_y = 0; else { offset_x = win->client_rect.left; offset_y = win->client_rect.top; } if (!clip_children( win, NULL, region, offset_x, offset_y )) goto error; } /* clip siblings of ancestors */ if (is_desktop_window(win)) offset_x = offset_y = 0; else { offset_x = win->window_rect.left; offset_y = win->window_rect.top; } if ((tmp = create_empty_region()) != NULL) { while (win->parent) { /* we don't clip out top-level siblings as that's up to the native windowing system */ if ((win->style & WS_CLIPSIBLINGS) && !is_desktop_window( win->parent )) { if (!clip_children( win->parent, win, region, 0, 0 )) goto error; if (is_region_empty( region )) break; } /* clip to parent client area */ win = win->parent; if (!is_desktop_window(win)) { offset_x += win->client_rect.left; offset_y += win->client_rect.top; offset_region( region, win->client_rect.left, win->client_rect.top ); } set_region_client_rect( tmp, win ); if (win->win_region && !intersect_window_region( tmp, win )) goto error; if (!intersect_region( region, region, tmp )) goto error; if (is_region_empty( region )) break; } free_region( tmp ); } offset_region( region, -offset_x, -offset_y ); /* make it relative to target window */ return region; error: if (tmp) free_region( tmp ); free_region( region ); return NULL; } /* get the window class of a window */ struct window_class* get_window_class( user_handle_t window ) { struct window *win; if (!(win = get_window( window ))) return NULL; if (!win->class) set_error( STATUS_ACCESS_DENIED ); return win->class; } /* determine the window visible rectangle, i.e. window or client rect cropped by parent rects */ /* the returned rectangle is in window coordinates; return 0 if rectangle is empty */ static int get_window_visible_rect( struct window *win, rectangle_t *rect, int frame ) { int offset_x = 0, offset_y = 0; if (!(win->style & WS_VISIBLE)) return 0; *rect = frame ? win->window_rect : win->client_rect; if (!is_desktop_window(win)) { offset_x = win->window_rect.left; offset_y = win->window_rect.top; } while (win->parent) { win = win->parent; if (!(win->style & WS_VISIBLE) || win->style & WS_MINIMIZE) return 0; if (!is_desktop_window(win)) { offset_x += win->client_rect.left; offset_y += win->client_rect.top; offset_rect( rect, win->client_rect.left, win->client_rect.top ); } if (!intersect_rect( rect, rect, &win->client_rect )) return 0; if (!intersect_rect( rect, rect, &win->window_rect )) return 0; } offset_rect( rect, -offset_x, -offset_y ); return 1; } /* return a copy of the specified region cropped to the window client or frame rectangle, */ /* and converted from client to window coordinates. Helper for (in)validate_window. */ static struct region *crop_region_to_win_rect( struct window *win, struct region *region, int frame ) { rectangle_t rect; struct region *tmp; if (!get_window_visible_rect( win, &rect, frame )) return NULL; if (!(tmp = create_empty_region())) return NULL; set_region_rect( tmp, &rect ); if (region) { /* map it to client coords */ offset_region( tmp, win->window_rect.left - win->client_rect.left, win->window_rect.top - win->client_rect.top ); /* intersect specified region with bounding rect */ if (!intersect_region( tmp, region, tmp )) goto done; if (is_region_empty( tmp )) goto done; /* map it back to window coords */ offset_region( tmp, win->client_rect.left - win->window_rect.left, win->client_rect.top - win->window_rect.top ); } return tmp; done: free_region( tmp ); return NULL; } /* set a region as new update region for the window */ static void set_update_region( struct window *win, struct region *region ) { if (region && !is_region_empty( region )) { if (!win->update_region) inc_window_paint_count( win, 1 ); else free_region( win->update_region ); win->update_region = region; } else { if (win->update_region) { inc_window_paint_count( win, -1 ); free_region( win->update_region ); } win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE | PAINT_NONCLIENT); win->update_region = NULL; if (region) free_region( region ); } } /* add a region to the update region; the passed region is freed or reused */ static int add_update_region( struct window *win, struct region *region ) { if (win->update_region && !union_region( region, win->update_region, region )) { free_region( region ); return 0; } set_update_region( win, region ); return 1; } /* crop the update region of children to the specified rectangle, in client coords */ static void crop_children_update_region( struct window *win, rectangle_t *rect ) { struct window *child; struct region *tmp; rectangle_t child_rect; LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry ) { if (!(child->style & WS_VISIBLE)) continue; if (!rect) /* crop everything out */ { crop_children_update_region( child, NULL ); set_update_region( child, NULL ); continue; } /* nothing to do if child is completely inside rect */ if (child->window_rect.left >= rect->left && child->window_rect.top >= rect->top && child->window_rect.right <= rect->right && child->window_rect.bottom <= rect->bottom) continue; /* map to child client coords and crop grand-children */ child_rect = *rect; offset_rect( &child_rect, -child->client_rect.left, -child->client_rect.top ); crop_children_update_region( child, &child_rect ); /* now crop the child itself */ if (!child->update_region) continue; if (!(tmp = create_empty_region())) continue; set_region_rect( tmp, rect ); offset_region( tmp, -child->window_rect.left, -child->window_rect.top ); if (intersect_region( tmp, child->update_region, tmp )) set_update_region( child, tmp ); else free_region( tmp ); } } /* validate the non client area of a window */ static void validate_non_client( struct window *win ) { struct region *tmp; rectangle_t rect; if (!win->update_region) return; /* nothing to do */ /* get client rect in window coords */ rect.left = win->client_rect.left - win->window_rect.left; rect.top = win->client_rect.top - win->window_rect.top; rect.right = win->client_rect.right - win->window_rect.left; rect.bottom = win->client_rect.bottom - win->window_rect.top; if ((tmp = create_empty_region())) { set_region_rect( tmp, &rect ); if (intersect_region( tmp, win->update_region, tmp )) set_update_region( win, tmp ); else free_region( tmp ); } win->paint_flags &= ~PAINT_NONCLIENT; } /* validate a window completely so that we don't get any further paint messages for it */ static void validate_whole_window( struct window *win ) { set_update_region( win, NULL ); if (win->paint_flags & PAINT_INTERNAL) { win->paint_flags &= ~PAINT_INTERNAL; inc_window_paint_count( win, -1 ); } } /* validate a window's children so that we don't get any further paint messages for it */ static void validate_children( struct window *win ) { struct window *child; LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry ) { if (!(child->style & WS_VISIBLE)) continue; validate_children(child); validate_whole_window(child); } } /* validate the update region of a window on all parents; helper for get_update_region */ static void validate_parents( struct window *child ) { int offset_x = 0, offset_y = 0; struct window *win = child; struct region *tmp = NULL; if (!child->update_region) return; while (win->parent) { /* map to parent client coords */ offset_x += win->window_rect.left; offset_y += win->window_rect.top; win = win->parent; /* and now map to window coords */ offset_x += win->client_rect.left - win->window_rect.left; offset_y += win->client_rect.top - win->window_rect.top; if (win->update_region && !(win->style & WS_CLIPCHILDREN)) { if (!tmp && !(tmp = create_empty_region())) return; offset_region( child->update_region, offset_x, offset_y ); if (subtract_region( tmp, win->update_region, child->update_region )) { set_update_region( win, tmp ); tmp = NULL; } /* restore child coords */ offset_region( child->update_region, -offset_x, -offset_y ); } } if (tmp) free_region( tmp ); } /* add/subtract a region (in client coordinates) to the update region of the window */ static void redraw_window( struct window *win, struct region *region, int frame, unsigned int flags ) { struct region *tmp; struct window *child; if (flags & RDW_INVALIDATE) { if (!(tmp = crop_region_to_win_rect( win, region, frame ))) return; if (!add_update_region( win, tmp )) return; if (flags & RDW_FRAME) win->paint_flags |= PAINT_NONCLIENT; if (flags & RDW_ERASE) win->paint_flags |= PAINT_ERASE; } else if (flags & RDW_VALIDATE) { if (!region && (flags & RDW_NOFRAME)) /* shortcut: validate everything */ { set_update_region( win, NULL ); } else if (win->update_region) { if ((tmp = crop_region_to_win_rect( win, region, frame ))) { if (!subtract_region( tmp, win->update_region, tmp )) { free_region( tmp ); return; } set_update_region( win, tmp ); } if (flags & RDW_NOFRAME) validate_non_client( win ); if (flags & RDW_NOERASE) win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE); } } if ((flags & RDW_INTERNALPAINT) && !(win->paint_flags & PAINT_INTERNAL)) { win->paint_flags |= PAINT_INTERNAL; inc_window_paint_count( win, 1 ); } else if ((flags & RDW_NOINTERNALPAINT) && (win->paint_flags & PAINT_INTERNAL)) { win->paint_flags &= ~PAINT_INTERNAL; inc_window_paint_count( win, -1 ); } /* now process children recursively */ if (flags & RDW_NOCHILDREN) return; if (win->style & WS_MINIMIZE) return; if ((win->style & WS_CLIPCHILDREN) && !(flags & RDW_ALLCHILDREN)) return; if (!(tmp = crop_region_to_win_rect( win, region, 0 ))) return; /* map to client coordinates */ offset_region( tmp, win->window_rect.left - win->client_rect.left, win->window_rect.top - win->client_rect.top ); if (flags & RDW_INVALIDATE) flags |= RDW_FRAME | RDW_ERASE; LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry ) { if (!(child->style & WS_VISIBLE)) continue; if (!rect_in_region( tmp, &child->window_rect )) continue; offset_region( tmp, -child->client_rect.left, -child->client_rect.top ); redraw_window( child, tmp, 1, flags ); offset_region( tmp, child->client_rect.left, child->client_rect.top ); } free_region( tmp ); } /* retrieve the update flags for a window depending on the state of the update region */ static unsigned int get_update_flags( struct window *win, unsigned int flags ) { unsigned int ret = 0; if (flags & UPDATE_NONCLIENT) { if ((win->paint_flags & PAINT_NONCLIENT) && win->update_region) ret |= UPDATE_NONCLIENT; } if (flags & UPDATE_ERASE) { if ((win->paint_flags & PAINT_ERASE) && win->update_region) ret |= UPDATE_ERASE; } if (flags & UPDATE_PAINT) { if (win->update_region) { if (win->paint_flags & PAINT_DELAYED_ERASE) ret |= UPDATE_DELAYED_ERASE; ret |= UPDATE_PAINT; } } if (flags & UPDATE_INTERNALPAINT) { if (win->paint_flags & PAINT_INTERNAL) { ret |= UPDATE_INTERNALPAINT; if (win->paint_flags & PAINT_DELAYED_ERASE) ret |= UPDATE_DELAYED_ERASE; } } return ret; } /* iterate through the children of the given window until we find one with some update flags */ static unsigned int get_child_update_flags( struct window *win, struct window *from_child, unsigned int flags, struct window **child ) { struct window *ptr; unsigned int ret = 0; /* first make sure we want to iterate children at all */ if (win->style & WS_MINIMIZE) return 0; /* note: the WS_CLIPCHILDREN test is the opposite of the invalidation case, * here we only want to repaint children of windows that clip them, others * need to wait for WM_PAINT to be done in the parent first. */ if (!(flags & UPDATE_ALLCHILDREN) && !(win->style & WS_CLIPCHILDREN)) return 0; LIST_FOR_EACH_ENTRY( ptr, &win->children, struct window, entry ) { if (from_child) /* skip all children until from_child is found */ { if (ptr == from_child) from_child = NULL; continue; } if (!(ptr->style & WS_VISIBLE)) continue; if ((ret = get_update_flags( ptr, flags )) != 0) { *child = ptr; break; } if ((ret = get_child_update_flags( ptr, NULL, flags, child ))) break; } return ret; } /* iterate through children and siblings of the given window until we find one with some update flags */ static unsigned int get_window_update_flags( struct window *win, struct window *from_child, unsigned int flags, struct window **child ) { unsigned int ret; struct window *ptr, *from_sibling = NULL; /* if some parent is not visible start from the next sibling */ if (!is_visible( win )) return 0; for (ptr = from_child; ptr; ptr = ptr->parent) { if (!(ptr->style & WS_VISIBLE) || (ptr->style & WS_MINIMIZE)) from_sibling = ptr; if (ptr == win) break; } /* non-client painting must be delayed if one of the parents is going to * be repainted and doesn't clip children */ if ((flags & UPDATE_NONCLIENT) && !(flags & (UPDATE_PAINT|UPDATE_INTERNALPAINT))) { for (ptr = win->parent; ptr; ptr = ptr->parent) { if (!(ptr->style & WS_CLIPCHILDREN) && win_needs_repaint( ptr )) return 0; } if (from_child && !(flags & UPDATE_ALLCHILDREN)) { for (ptr = from_sibling ? from_sibling : from_child; ptr; ptr = ptr->parent) { if (!(ptr->style & WS_CLIPCHILDREN) && win_needs_repaint( ptr )) from_sibling = ptr; if (ptr == win) break; } } } /* check window itself (only if not restarting from a child) */ if (!from_child) { if ((ret = get_update_flags( win, flags ))) { *child = win; return ret; } from_child = win; } /* now check children */ if (flags & UPDATE_NOCHILDREN) return 0; if (!from_sibling) { if ((ret = get_child_update_flags( from_child, NULL, flags, child ))) return ret; from_sibling = from_child; } /* then check siblings and parent siblings */ while (from_sibling->parent && from_sibling != win) { if ((ret = get_child_update_flags( from_sibling->parent, from_sibling, flags, child ))) return ret; from_sibling = from_sibling->parent; } return 0; } /* expose the areas revealed by a vis region change on the window parent */ /* returns the region exposed on the window itself (in client coordinates) */ static struct region *expose_window( struct window *win, const rectangle_t *old_window_rect, struct region *old_vis_rgn ) { struct region *new_vis_rgn, *exposed_rgn; if (!(new_vis_rgn = get_visible_region( win, DCX_WINDOW ))) return NULL; if ((exposed_rgn = create_empty_region())) { if (subtract_region( exposed_rgn, new_vis_rgn, old_vis_rgn ) && !is_region_empty( exposed_rgn )) { /* make it relative to the new client area */ offset_region( exposed_rgn, win->window_rect.left - win->client_rect.left, win->window_rect.top - win->client_rect.top ); } else { free_region( exposed_rgn ); exposed_rgn = NULL; } } if (win->parent) { /* make it relative to the old window pos for subtracting */ offset_region( new_vis_rgn, win->window_rect.left - old_window_rect->left, win->window_rect.top - old_window_rect->top ); if ((win->parent->style & WS_CLIPCHILDREN) ? subtract_region( new_vis_rgn, old_vis_rgn, new_vis_rgn ) : xor_region( new_vis_rgn, old_vis_rgn, new_vis_rgn )) { if (!is_region_empty( new_vis_rgn )) { /* make it relative to parent */ offset_region( new_vis_rgn, old_window_rect->left, old_window_rect->top ); redraw_window( win->parent, new_vis_rgn, 0, RDW_INVALIDATE | RDW_ERASE | RDW_ALLCHILDREN ); } } } free_region( new_vis_rgn ); return exposed_rgn; } /* set the window and client rectangles, updating the update region if necessary */ static void set_window_pos( struct window *win, struct window *previous, unsigned int swp_flags, const rectangle_t *window_rect, const rectangle_t *client_rect, const rectangle_t *visible_rect, const rectangle_t *valid_rects ) { struct region *old_vis_rgn = NULL, *exposed_rgn = NULL; const rectangle_t old_window_rect = win->window_rect; const rectangle_t old_visible_rect = win->visible_rect; const rectangle_t old_client_rect = win->client_rect; rectangle_t rect; int client_changed, frame_changed; int visible = (win->style & WS_VISIBLE) || (swp_flags & SWP_SHOWWINDOW); if (win->parent && !is_visible( win->parent )) visible = 0; if (visible && !(old_vis_rgn = get_visible_region( win, DCX_WINDOW ))) return; /* set the new window info before invalidating anything */ win->window_rect = *window_rect; win->visible_rect = *visible_rect; win->client_rect = *client_rect; if (!(swp_flags & SWP_NOZORDER) && win->parent) link_window( win, previous ); if (swp_flags & SWP_SHOWWINDOW) win->style |= WS_VISIBLE; else if (swp_flags & SWP_HIDEWINDOW) win->style &= ~WS_VISIBLE; /* keep children at the same position relative to top right corner when the parent is mirrored */ if (win->ex_style & WS_EX_LAYOUTRTL) { struct window *child; int old_size = old_client_rect.right - old_client_rect.left; int new_size = win->client_rect.right - win->client_rect.left; if (old_size != new_size) LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry ) { offset_rect( &child->window_rect, new_size - old_size, 0 ); offset_rect( &child->visible_rect, new_size - old_size, 0 ); offset_rect( &child->client_rect, new_size - old_size, 0 ); } } /* reset cursor clip rectangle when the desktop changes size */ if (win == win->desktop->top_window) win->desktop->cursor.clip = *window_rect; /* if the window is not visible, everything is easy */ if (!visible) return; /* expose anything revealed by the change */ if (!(swp_flags & SWP_NOREDRAW)) exposed_rgn = expose_window( win, &old_window_rect, old_vis_rgn ); if (!(win->style & WS_VISIBLE)) { /* clear the update region since the window is no longer visible */ validate_whole_window( win ); validate_children( win ); goto done; } /* crop update region to the new window rect */ if (win->update_region) { if (get_window_visible_rect( win, &rect, 1 )) { struct region *tmp = create_empty_region(); if (tmp) { set_region_rect( tmp, &rect ); if (intersect_region( tmp, win->update_region, tmp )) set_update_region( win, tmp ); else free_region( tmp ); } } else set_update_region( win, NULL ); /* visible rect is empty */ } /* crop children regions to the new window rect */ if (get_window_visible_rect( win, &rect, 0 )) { /* map to client coords */ offset_rect( &rect, win->window_rect.left - win->client_rect.left, win->window_rect.top - win->client_rect.top ); crop_children_update_region( win, &rect ); } else crop_children_update_region( win, NULL ); if (swp_flags & SWP_NOREDRAW) goto done; /* do not repaint anything */ /* expose the whole non-client area if it changed in any way */ if (swp_flags & SWP_NOCOPYBITS) { frame_changed = ((swp_flags & SWP_FRAMECHANGED) || memcmp( window_rect, &old_window_rect, sizeof(old_window_rect) ) || memcmp( visible_rect, &old_visible_rect, sizeof(old_visible_rect) )); client_changed = memcmp( client_rect, &old_client_rect, sizeof(old_client_rect) ); } else { /* assume the bits have been moved to follow the window rect */ int x_offset = window_rect->left - old_window_rect.left; int y_offset = window_rect->top - old_window_rect.top; frame_changed = ((swp_flags & SWP_FRAMECHANGED) || window_rect->right - old_window_rect.right != x_offset || window_rect->bottom - old_window_rect.bottom != y_offset || visible_rect->left - old_visible_rect.left != x_offset || visible_rect->right - old_visible_rect.right != x_offset || visible_rect->top - old_visible_rect.top != y_offset || visible_rect->bottom - old_visible_rect.bottom != y_offset); client_changed = (client_rect->left - old_client_rect.left != x_offset || client_rect->right - old_client_rect.right != x_offset || client_rect->top - old_client_rect.top != y_offset || client_rect->bottom - old_client_rect.bottom != y_offset || !valid_rects || memcmp( &valid_rects[0], client_rect, sizeof(*client_rect) )); } if (frame_changed || client_changed) { struct region *win_rgn = old_vis_rgn; /* reuse previous region */ set_region_rect( win_rgn, window_rect ); if (valid_rects) { /* subtract the valid portion of client rect from the total region */ struct region *tmp = create_empty_region(); if (tmp) { set_region_rect( tmp, &valid_rects[0] ); if (subtract_region( tmp, win_rgn, tmp )) win_rgn = tmp; else free_region( tmp ); } } if (!is_desktop_window(win)) offset_region( win_rgn, -client_rect->left, -client_rect->top ); if (exposed_rgn) { union_region( exposed_rgn, exposed_rgn, win_rgn ); if (win_rgn != old_vis_rgn) free_region( win_rgn ); } else { exposed_rgn = win_rgn; if (win_rgn == old_vis_rgn) old_vis_rgn = NULL; } } if (exposed_rgn) redraw_window( win, exposed_rgn, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN ); done: if (old_vis_rgn) free_region( old_vis_rgn ); if (exposed_rgn) free_region( exposed_rgn ); clear_error(); /* we ignore out of memory errors once the new rects have been set */ } /* set the window region, updating the update region if necessary */ static void set_window_region( struct window *win, struct region *region, int redraw ) { struct region *old_vis_rgn = NULL, *exposed_rgn; /* no need to redraw if window is not visible */ if (redraw && !is_visible( win )) redraw = 0; if (redraw) old_vis_rgn = get_visible_region( win, DCX_WINDOW ); if (win->win_region) free_region( win->win_region ); win->win_region = region; /* expose anything revealed by the change */ if (old_vis_rgn && ((exposed_rgn = expose_window( win, &win->window_rect, old_vis_rgn )))) { redraw_window( win, exposed_rgn, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN ); free_region( exposed_rgn ); } if (old_vis_rgn) free_region( old_vis_rgn ); clear_error(); /* we ignore out of memory errors since the region has been set */ } /* destroy a window */ void destroy_window( struct window *win ) { /* hide the window */ if (is_visible(win)) { struct region *vis_rgn = get_visible_region( win, DCX_WINDOW ); win->style &= ~WS_VISIBLE; if (vis_rgn) { struct region *exposed_rgn = expose_window( win, &win->window_rect, vis_rgn ); if (exposed_rgn) free_region( exposed_rgn ); free_region( vis_rgn ); } validate_whole_window( win ); validate_children( win ); } /* destroy all children */ while (!list_empty(&win->children)) destroy_window( LIST_ENTRY( list_head(&win->children), struct window, entry )); while (!list_empty(&win->unlinked)) destroy_window( LIST_ENTRY( list_head(&win->unlinked), struct window, entry )); /* reset global window pointers, if the corresponding window is destroyed */ if (win == shell_window) shell_window = NULL; if (win == shell_listview) shell_listview = NULL; if (win == progman_window) progman_window = NULL; if (win == taskman_window) taskman_window = NULL; free_user_handle( win->handle ); destroy_properties( win ); list_remove( &win->entry ); if (is_desktop_window(win)) { struct desktop *desktop = win->desktop; assert( desktop->top_window == win || desktop->msg_window == win ); if (desktop->top_window == win) desktop->top_window = NULL; else desktop->msg_window = NULL; } detach_window_thread( win ); if (win->win_region) free_region( win->win_region ); if (win->update_region) free_region( win->update_region ); if (win->class) release_class( win->class ); free( win->text ); memset( win, 0x55, sizeof(*win) + win->nb_extra_bytes - 1 ); free( win ); } /* create a window */ DECL_HANDLER(create_window) { struct window *win, *parent = NULL, *owner = NULL; struct unicode_str cls_name; atom_t atom; reply->handle = 0; if (req->parent && !(parent = get_window( req->parent ))) return; if (req->owner) { if (!(owner = get_window( req->owner ))) return; if (is_desktop_window(owner)) owner = NULL; else if (parent && !is_desktop_window(parent)) { /* an owned window must be created as top-level */ set_error( STATUS_ACCESS_DENIED ); return; } else /* owner must be a top-level window */ while (!is_desktop_window(owner->parent)) owner = owner->parent; } get_req_unicode_str( &cls_name ); atom = cls_name.len ? find_global_atom( NULL, &cls_name ) : req->atom; if (!(win = create_window( parent, owner, atom, req->instance ))) return; reply->handle = win->handle; reply->parent = win->parent ? win->parent->handle : 0; reply->owner = win->owner; reply->extra = win->nb_extra_bytes; reply->class_ptr = get_class_client_ptr( win->class ); } /* set the parent of a window */ DECL_HANDLER(set_parent) { struct window *win, *parent = NULL; if (!(win = get_window( req->handle ))) return; if (req->parent && !(parent = get_window( req->parent ))) return; if (is_desktop_window(win)) { set_error( STATUS_INVALID_PARAMETER ); return; } reply->old_parent = win->parent->handle; reply->full_parent = parent ? parent->handle : 0; set_parent_window( win, parent ); } /* destroy a window */ DECL_HANDLER(destroy_window) { struct window *win = get_window( req->handle ); if (win) { if (!is_desktop_window(win)) destroy_window( win ); else if (win->thread == current) detach_window_thread( win ); else set_error( STATUS_ACCESS_DENIED ); } } /* retrieve the desktop window for the current thread */ DECL_HANDLER(get_desktop_window) { struct desktop *desktop = get_thread_desktop( current, 0 ); if (!desktop) return; if (!desktop->top_window && req->force) /* create it */ { if ((desktop->top_window = create_window( NULL, NULL, DESKTOP_ATOM, 0 ))) { detach_window_thread( desktop->top_window ); desktop->top_window->style = WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN; } } if (!desktop->msg_window && req->force) /* create it */ { static const WCHAR messageW[] = {'M','e','s','s','a','g','e'}; static const struct unicode_str name = { messageW, sizeof(messageW) }; atom_t atom = add_global_atom( NULL, &name ); if (atom && (desktop->msg_window = create_window( NULL, NULL, atom, 0 ))) { detach_window_thread( desktop->msg_window ); desktop->msg_window->style = WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN; } } reply->top_window = desktop->top_window ? desktop->top_window->handle : 0; reply->msg_window = desktop->msg_window ? desktop->msg_window->handle : 0; release_object( desktop ); } /* set a window owner */ DECL_HANDLER(set_window_owner) { struct window *win = get_window( req->handle ); struct window *owner = NULL, *ptr; if (!win) return; if (req->owner && !(owner = get_window( req->owner ))) return; if (is_desktop_window(win)) { set_error( STATUS_ACCESS_DENIED ); return; } /* make sure owner is not a successor of window */ for (ptr = owner; ptr; ptr = ptr->owner ? get_window( ptr->owner ) : NULL) { if (ptr == win) { set_error( STATUS_INVALID_PARAMETER ); return; } } reply->prev_owner = win->owner; reply->full_owner = win->owner = owner ? owner->handle : 0; } /* get information from a window handle */ DECL_HANDLER(get_window_info) { struct window *win = get_window( req->handle ); reply->full_handle = 0; reply->tid = reply->pid = 0; if (win) { reply->full_handle = win->handle; reply->last_active = win->handle; reply->is_unicode = win->is_unicode; if (get_user_object( win->last_active, USER_WINDOW )) reply->last_active = win->last_active; if (win->thread) { reply->tid = get_thread_id( win->thread ); reply->pid = get_process_id( win->thread->process ); reply->atom = win->class ? get_class_atom( win->class ) : DESKTOP_ATOM; } } } /* set some information in a window */ DECL_HANDLER(set_window_info) { struct window *win = get_window( req->handle ); if (!win) return; if (req->flags && is_desktop_window(win) && win->thread != current) { set_error( STATUS_ACCESS_DENIED ); return; } if (req->extra_size > sizeof(req->extra_value) || req->extra_offset < -1 || req->extra_offset > win->nb_extra_bytes - (int)req->extra_size) { set_win32_error( ERROR_INVALID_INDEX ); return; } if (req->extra_offset != -1) { memcpy( &reply->old_extra_value, win->extra_bytes + req->extra_offset, req->extra_size ); } else if (req->flags & SET_WIN_EXTRA) { set_win32_error( ERROR_INVALID_INDEX ); return; } reply->old_style = win->style; reply->old_ex_style = win->ex_style; reply->old_id = win->id; reply->old_instance = win->instance; reply->old_user_data = win->user_data; if (req->flags & SET_WIN_STYLE) win->style = req->style; if (req->flags & SET_WIN_EXSTYLE) { /* WS_EX_TOPMOST can only be changed for unlinked windows */ if (!win->is_linked) win->ex_style = req->ex_style; else win->ex_style = (req->ex_style & ~WS_EX_TOPMOST) | (win->ex_style & WS_EX_TOPMOST); if (!(win->ex_style & WS_EX_LAYERED)) win->is_layered = 0; } if (req->flags & SET_WIN_ID) win->id = req->id; if (req->flags & SET_WIN_INSTANCE) win->instance = req->instance; if (req->flags & SET_WIN_UNICODE) win->is_unicode = req->is_unicode; if (req->flags & SET_WIN_USERDATA) win->user_data = req->user_data; if (req->flags & SET_WIN_EXTRA) memcpy( win->extra_bytes + req->extra_offset, &req->extra_value, req->extra_size ); /* changing window style triggers a non-client paint */ if (req->flags & SET_WIN_STYLE) win->paint_flags |= PAINT_NONCLIENT; } /* get a list of the window parents, up to the root of the tree */ DECL_HANDLER(get_window_parents) { struct window *ptr, *win = get_window( req->handle ); int total = 0; user_handle_t *data; data_size_t len; if (win) for (ptr = win->parent; ptr; ptr = ptr->parent) total++; reply->count = total; len = min( get_reply_max_size(), total * sizeof(user_handle_t) ); if (len && ((data = set_reply_data_size( len )))) { for (ptr = win->parent; ptr && len; ptr = ptr->parent, len -= sizeof(*data)) *data++ = ptr->handle; } } /* get a list of the window children */ DECL_HANDLER(get_window_children) { struct window *parent = NULL; unsigned int total; user_handle_t *data; data_size_t len; struct unicode_str cls_name; atom_t atom = req->atom; struct desktop *desktop = NULL; get_req_unicode_str( &cls_name ); if (cls_name.len && !(atom = find_global_atom( NULL, &cls_name ))) return; if (req->desktop) { if (!(desktop = get_desktop_obj( current->process, req->desktop, DESKTOP_ENUMERATE ))) return; parent = desktop->top_window; } else { if (req->parent && !(parent = get_window( req->parent ))) return; if (!parent && !(desktop = get_thread_desktop( current, 0 ))) return; } if (parent) total = get_children_windows( parent, atom, req->tid, NULL, 0 ); else total = get_children_windows( desktop->top_window, atom, req->tid, NULL, 0 ) + get_children_windows( desktop->msg_window, atom, req->tid, NULL, 0 ); reply->count = total; len = min( get_reply_max_size(), total * sizeof(user_handle_t) ); if (len && ((data = set_reply_data_size( len )))) { if (parent) get_children_windows( parent, atom, req->tid, data, len / sizeof(user_handle_t) ); else { total = get_children_windows( desktop->top_window, atom, req->tid, data, len / sizeof(user_handle_t) ); data += total; len -= total * sizeof(user_handle_t); if (len >= sizeof(user_handle_t)) get_children_windows( desktop->msg_window, atom, req->tid, data, len / sizeof(user_handle_t) ); } } if (desktop) release_object( desktop ); } /* get a list of the window children that contain a given point */ DECL_HANDLER(get_window_children_from_point) { struct user_handle_array array; struct window *parent = get_window( req->parent ); data_size_t len; if (!parent) return; array.handles = NULL; array.count = 0; array.total = 0; if (!all_windows_from_point( parent, req->x, req->y, &array )) return; reply->count = array.count; len = min( get_reply_max_size(), array.count * sizeof(user_handle_t) ); if (len) set_reply_data_ptr( array.handles, len ); else free( array.handles ); } /* get window tree information from a window handle */ DECL_HANDLER(get_window_tree) { struct window *ptr, *win = get_window( req->handle ); if (!win) return; reply->parent = 0; reply->owner = 0; reply->next_sibling = 0; reply->prev_sibling = 0; reply->first_sibling = 0; reply->last_sibling = 0; reply->first_child = 0; reply->last_child = 0; if (win->parent) { struct window *parent = win->parent; reply->parent = parent->handle; reply->owner = win->owner; if (win->is_linked) { if ((ptr = get_next_window( win ))) reply->next_sibling = ptr->handle; if ((ptr = get_prev_window( win ))) reply->prev_sibling = ptr->handle; } if ((ptr = get_first_child( parent ))) reply->first_sibling = ptr->handle; if ((ptr = get_last_child( parent ))) reply->last_sibling = ptr->handle; } if ((ptr = get_first_child( win ))) reply->first_child = ptr->handle; if ((ptr = get_last_child( win ))) reply->last_child = ptr->handle; } /* set the position and Z order of a window */ DECL_HANDLER(set_window_pos) { rectangle_t window_rect, client_rect, visible_rect; struct window *previous = NULL; struct window *win = get_window( req->handle ); unsigned int flags = req->flags; if (!win) return; if (!win->parent) flags |= SWP_NOZORDER; /* no Z order for the desktop */ if (!(flags & SWP_NOZORDER)) { switch ((int)req->previous) { case 0: /* HWND_TOP */ previous = WINPTR_TOP; break; case 1: /* HWND_BOTTOM */ previous = WINPTR_BOTTOM; break; case -1: /* HWND_TOPMOST */ previous = WINPTR_TOPMOST; break; case -2: /* HWND_NOTOPMOST */ previous = WINPTR_NOTOPMOST; break; default: if (!(previous = get_window( req->previous ))) return; /* previous must be a sibling */ if (previous->parent != win->parent) { set_error( STATUS_INVALID_PARAMETER ); return; } break; } if (previous == win) flags |= SWP_NOZORDER; /* nothing to do */ } /* window rectangle must be ordered properly */ if (req->window.right < req->window.left || req->window.bottom < req->window.top) { set_error( STATUS_INVALID_PARAMETER ); return; } window_rect = visible_rect = req->window; client_rect = req->client; if (get_req_data_size() >= sizeof(rectangle_t)) memcpy( &visible_rect, get_req_data(), sizeof(rectangle_t) ); if (win->parent && win->parent->ex_style & WS_EX_LAYOUTRTL) { mirror_rect( &win->parent->client_rect, &window_rect ); mirror_rect( &win->parent->client_rect, &visible_rect ); mirror_rect( &win->parent->client_rect, &client_rect ); } if (get_req_data_size() >= 3 * sizeof(rectangle_t)) { rectangle_t valid_rects[2]; memcpy( valid_rects, (const rectangle_t *)get_req_data() + 1, 2 * sizeof(rectangle_t) ); if (win->parent && win->parent->ex_style & WS_EX_LAYOUTRTL) { mirror_rect( &win->parent->client_rect, &valid_rects[0] ); mirror_rect( &win->parent->client_rect, &valid_rects[1] ); } set_window_pos( win, previous, flags, &window_rect, &client_rect, &visible_rect, valid_rects ); } else set_window_pos( win, previous, flags, &window_rect, &client_rect, &visible_rect, NULL ); reply->new_style = win->style; reply->new_ex_style = win->ex_style; } /* get the window and client rectangles of a window */ DECL_HANDLER(get_window_rectangles) { struct window *win = get_window( req->handle ); if (!win) return; reply->window = win->window_rect; reply->visible = win->visible_rect; reply->client = win->client_rect; switch (req->relative) { case COORDS_CLIENT: offset_rect( &reply->window, -win->client_rect.left, -win->client_rect.top ); offset_rect( &reply->visible, -win->client_rect.left, -win->client_rect.top ); offset_rect( &reply->client, -win->client_rect.left, -win->client_rect.top ); if (win->ex_style & WS_EX_LAYOUTRTL) { mirror_rect( &win->client_rect, &reply->window ); mirror_rect( &win->client_rect, &reply->visible ); } break; case COORDS_WINDOW: offset_rect( &reply->window, -win->window_rect.left, -win->window_rect.top ); offset_rect( &reply->visible, -win->window_rect.left, -win->window_rect.top ); offset_rect( &reply->client, -win->window_rect.left, -win->window_rect.top ); if (win->ex_style & WS_EX_LAYOUTRTL) { mirror_rect( &win->window_rect, &reply->visible ); mirror_rect( &win->window_rect, &reply->client ); } break; case COORDS_PARENT: if (win->parent && win->parent->ex_style & WS_EX_LAYOUTRTL) { mirror_rect( &win->parent->client_rect, &reply->window ); mirror_rect( &win->parent->client_rect, &reply->visible ); mirror_rect( &win->parent->client_rect, &reply->client ); } break; case COORDS_SCREEN: client_to_screen_rect( win->parent, &reply->window ); client_to_screen_rect( win->parent, &reply->visible ); client_to_screen_rect( win->parent, &reply->client ); break; default: set_error( STATUS_INVALID_PARAMETER ); break; } } /* get the window text */ DECL_HANDLER(get_window_text) { struct window *win = get_window( req->handle ); if (win && win->text) { data_size_t len = strlenW( win->text ) * sizeof(WCHAR); if (len > get_reply_max_size()) len = get_reply_max_size(); set_reply_data( win->text, len ); } } /* set the window text */ DECL_HANDLER(set_window_text) { struct window *win = get_window( req->handle ); if (win) { WCHAR *text = NULL; data_size_t len = get_req_data_size() / sizeof(WCHAR); if (len) { if (!(text = mem_alloc( (len+1) * sizeof(WCHAR) ))) return; memcpy( text, get_req_data(), len * sizeof(WCHAR) ); text[len] = 0; } free( win->text ); win->text = text; } } /* get the coordinates offset between two windows */ DECL_HANDLER(get_windows_offset) { struct window *win; int mirror_from = 0, mirror_to = 0; reply->x = reply->y = 0; if (req->from) { if (!(win = get_window( req->from ))) return; if (win->ex_style & WS_EX_LAYOUTRTL) { mirror_from = 1; reply->x += win->client_rect.right - win->client_rect.left; } while (win && !is_desktop_window(win)) { reply->x += win->client_rect.left; reply->y += win->client_rect.top; win = win->parent; } } if (req->to) { if (!(win = get_window( req->to ))) return; if (win->ex_style & WS_EX_LAYOUTRTL) { mirror_to = 1; reply->x -= win->client_rect.right - win->client_rect.left; } while (win && !is_desktop_window(win)) { reply->x -= win->client_rect.left; reply->y -= win->client_rect.top; win = win->parent; } } if (mirror_from) reply->x = -reply->x; reply->mirror = mirror_from ^ mirror_to; } /* get the visible region of a window */ DECL_HANDLER(get_visible_region) { struct region *region; struct window *top, *win = get_window( req->window ); if (!win) return; top = get_top_clipping_window( win ); if ((region = get_visible_region( win, req->flags ))) { rectangle_t *data; map_win_region_to_screen( win, region ); data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size ); if (data) set_reply_data_ptr( data, reply->total_size ); } reply->top_win = top->handle; reply->top_rect = (top == win && (req->flags & DCX_WINDOW)) ? top->visible_rect : top->client_rect; if (!is_desktop_window(win)) { reply->win_rect = (req->flags & DCX_WINDOW) ? win->window_rect : win->client_rect; client_to_screen_rect( top->parent, &reply->top_rect ); client_to_screen_rect( win->parent, &reply->win_rect ); } else { reply->win_rect.left = 0; reply->win_rect.top = 0; reply->win_rect.right = win->client_rect.right - win->client_rect.left; reply->win_rect.bottom = win->client_rect.bottom - win->client_rect.top; } } /* get the window region */ DECL_HANDLER(get_window_region) { rectangle_t *data; struct window *win = get_window( req->window ); if (!win) return; if (!win->win_region) return; if (win->ex_style & WS_EX_LAYOUTRTL) { struct region *region = create_empty_region(); if (!region) return; if (!copy_region( region, win->win_region )) { free_region( region ); return; } mirror_region( &win->window_rect, region ); data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size ); } else data = get_region_data( win->win_region, get_reply_max_size(), &reply->total_size ); if (data) set_reply_data_ptr( data, reply->total_size ); } /* set the window region */ DECL_HANDLER(set_window_region) { struct region *region = NULL; struct window *win = get_window( req->window ); if (!win) return; if (get_req_data_size()) /* no data means remove the region completely */ { if (!(region = create_region_from_req_data( get_req_data(), get_req_data_size() ))) return; if (win->ex_style & WS_EX_LAYOUTRTL) mirror_region( &win->window_rect, region ); } set_window_region( win, region, req->redraw ); } /* get a window update region */ DECL_HANDLER(get_update_region) { rectangle_t *data; unsigned int flags = req->flags; struct window *from_child = NULL; struct window *win = get_window( req->window ); reply->flags = 0; if (!win) return; if (req->from_child) { struct window *ptr; if (!(from_child = get_window( req->from_child ))) return; /* make sure from_child is a child of win */ ptr = from_child; while (ptr && ptr != win) ptr = ptr->parent; if (!ptr) { set_error( STATUS_INVALID_PARAMETER ); return; } } if (flags & UPDATE_DELAYED_ERASE) /* this means that the previous call didn't erase */ { if (from_child) from_child->paint_flags |= PAINT_DELAYED_ERASE; else win->paint_flags |= PAINT_DELAYED_ERASE; } reply->flags = get_window_update_flags( win, from_child, flags, &win ); reply->child = win->handle; if (flags & UPDATE_NOREGION) return; if (win->update_region) { /* convert update region to screen coordinates */ struct region *region = create_empty_region(); if (!region) return; if (!copy_region( region, win->update_region )) { free_region( region ); return; } map_win_region_to_screen( win, region ); if (!(data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size ))) return; set_reply_data_ptr( data, reply->total_size ); } if (reply->flags & (UPDATE_PAINT|UPDATE_INTERNALPAINT)) /* validate everything */ { validate_parents( win ); validate_whole_window( win ); } else { if (reply->flags & UPDATE_NONCLIENT) validate_non_client( win ); if (reply->flags & UPDATE_ERASE) { win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE); /* desktop window only gets erased, not repainted */ if (is_desktop_window(win)) validate_whole_window( win ); } } } /* update the z order of a window so that a given rectangle is fully visible */ DECL_HANDLER(update_window_zorder) { rectangle_t tmp, rect = req->rect; struct window *ptr, *win = get_window( req->window ); if (!win || !win->parent || !is_visible( win )) return; /* nothing to do */ if (win->ex_style & WS_EX_LAYOUTRTL) mirror_rect( &win->client_rect, &rect ); offset_rect( &rect, win->client_rect.left, win->client_rect.top ); LIST_FOR_EACH_ENTRY( ptr, &win->parent->children, struct window, entry ) { if (ptr == win) break; if (!(ptr->style & WS_VISIBLE)) continue; if (ptr->ex_style & WS_EX_TRANSPARENT) continue; if (!intersect_rect( &tmp, &ptr->visible_rect, &rect )) continue; if (ptr->win_region && !rect_in_region( ptr->win_region, &rect )) continue; /* found a window obscuring the rectangle, now move win above this one */ /* making sure to not violate the topmost rule */ if (!(ptr->ex_style & WS_EX_TOPMOST) || (win->ex_style & WS_EX_TOPMOST)) { list_remove( &win->entry ); list_add_before( &ptr->entry, &win->entry ); } break; } } /* mark parts of a window as needing a redraw */ DECL_HANDLER(redraw_window) { struct region *region = NULL; struct window *win = get_window( req->window ); if (!win) return; if (!is_visible( win )) return; /* nothing to do */ if (req->flags & (RDW_VALIDATE|RDW_INVALIDATE)) { if (get_req_data_size()) /* no data means whole rectangle */ { if (!(region = create_region_from_req_data( get_req_data(), get_req_data_size() ))) return; if (win->ex_style & WS_EX_LAYOUTRTL) mirror_region( &win->client_rect, region ); } } redraw_window( win, region, (req->flags & RDW_INVALIDATE) && (req->flags & RDW_FRAME), req->flags ); if (region) free_region( region ); } /* set a window property */ DECL_HANDLER(set_window_property) { struct unicode_str name; struct window *win = get_window( req->window ); if (!win) return; get_req_unicode_str( &name ); if (name.len) { atom_t atom = add_global_atom( NULL, &name ); if (atom) { set_property( win, atom, req->data, PROP_TYPE_STRING ); release_global_atom( NULL, atom ); } } else set_property( win, req->atom, req->data, PROP_TYPE_ATOM ); } /* remove a window property */ DECL_HANDLER(remove_window_property) { struct unicode_str name; struct window *win = get_window( req->window ); get_req_unicode_str( &name ); if (win) { atom_t atom = name.len ? find_global_atom( NULL, &name ) : req->atom; if (atom) reply->data = remove_property( win, atom ); } } /* get a window property */ DECL_HANDLER(get_window_property) { struct unicode_str name; struct window *win = get_window( req->window ); get_req_unicode_str( &name ); if (win) { atom_t atom = name.len ? find_global_atom( NULL, &name ) : req->atom; if (atom) reply->data = get_property( win, atom ); } } /* get the list of properties of a window */ DECL_HANDLER(get_window_properties) { property_data_t *data; int i, count, max = get_reply_max_size() / sizeof(*data); struct window *win = get_window( req->window ); reply->total = 0; if (!win) return; for (i = count = 0; i < win->prop_inuse; i++) if (win->properties[i].type != PROP_TYPE_FREE) count++; reply->total = count; if (count > max) count = max; if (!count || !(data = set_reply_data_size( count * sizeof(*data) ))) return; for (i = 0; i < win->prop_inuse && count; i++) { if (win->properties[i].type == PROP_TYPE_FREE) continue; data->atom = win->properties[i].atom; data->string = (win->properties[i].type == PROP_TYPE_STRING); data->data = win->properties[i].data; data++; count--; } } /* get the new window pointer for a global window, checking permissions */ /* helper for set_global_windows request */ static int get_new_global_window( struct window **win, user_handle_t handle ) { if (!handle) { *win = NULL; return 1; } else if (*win) { set_error( STATUS_ACCESS_DENIED ); return 0; } *win = get_window( handle ); return (*win != NULL); } /* Set/get the global windows */ DECL_HANDLER(set_global_windows) { struct window *new_shell_window = shell_window; struct window *new_shell_listview = shell_listview; struct window *new_progman_window = progman_window; struct window *new_taskman_window = taskman_window; reply->old_shell_window = shell_window ? shell_window->handle : 0; reply->old_shell_listview = shell_listview ? shell_listview->handle : 0; reply->old_progman_window = progman_window ? progman_window->handle : 0; reply->old_taskman_window = taskman_window ? taskman_window->handle : 0; if (req->flags & SET_GLOBAL_SHELL_WINDOWS) { if (!get_new_global_window( &new_shell_window, req->shell_window )) return; if (!get_new_global_window( &new_shell_listview, req->shell_listview )) return; } if (req->flags & SET_GLOBAL_PROGMAN_WINDOW) { if (!get_new_global_window( &new_progman_window, req->progman_window )) return; } if (req->flags & SET_GLOBAL_TASKMAN_WINDOW) { if (!get_new_global_window( &new_taskman_window, req->taskman_window )) return; } shell_window = new_shell_window; shell_listview = new_shell_listview; progman_window = new_progman_window; taskman_window = new_taskman_window; } /* retrieve layered info for a window */ DECL_HANDLER(get_window_layered_info) { struct window *win = get_window( req->handle ); if (!win) return; if (win->is_layered) { reply->color_key = win->color_key; reply->alpha = win->alpha; reply->flags = win->layered_flags; } else set_win32_error( ERROR_INVALID_WINDOW_HANDLE ); } /* set layered info for a window */ DECL_HANDLER(set_window_layered_info) { struct window *win = get_window( req->handle ); if (!win) return; if (win->ex_style & WS_EX_LAYERED) { if (req->flags & LWA_ALPHA) win->alpha = req->alpha; else if (!win->is_layered) win->alpha = 0; /* alpha init value is 0 */ win->color_key = req->color_key; win->layered_flags = req->flags; win->is_layered = 1; } else set_win32_error( ERROR_INVALID_WINDOW_HANDLE ); }