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wine/server/window.c

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/*
* 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;
}
/* attempt to close the desktop window when the last process using it is gone */
void close_desktop_window( struct desktop *desktop )
{
struct window *win = desktop->top_window;
if (win && win->thread) post_message( win->handle, WM_CLOSE, 0, 0 );
}
/* 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 owner */
win->last_active = win->handle;
if ((owner = get_user_object( win->owner, USER_WINDOW ))) owner->last_active = win->handle;
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;
}
/* compute the intersection of two rectangles; return 0 if the result is empty */
static inline int intersect_rect( rectangle_t *dst, const rectangle_t *src1, const rectangle_t *src2 )
{
dst->left = max( src1->left, src2->left );
dst->top = max( src1->top, src2->top );
dst->right = min( src1->right, src2->right );
dst->bottom = min( src1->bottom, src2->bottom );
return (dst->left < dst->right && dst->top < dst->bottom);
}
/* 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;
/* 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)
{
const rectangle_t *visible_rect = NULL, *valid_rects = NULL;
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;
}
if (get_req_data_size() >= sizeof(rectangle_t)) visible_rect = get_req_data();
if (get_req_data_size() >= 3 * sizeof(rectangle_t)) valid_rects = visible_rect + 1;
if (!visible_rect) visible_rect = &req->window;
set_window_pos( win, previous, flags, &req->window, &req->client, visible_rect, valid_rects );
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)
{
reply->window = win->window_rect;
reply->visible = win->visible_rect;
reply->client = win->client_rect;
}
}
/* 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;
reply->x = reply->y = 0;
if (req->from)
{
if (!(win = get_window( req->from ))) return;
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;
while (win && !is_desktop_window(win))
{
reply->x -= win->client_rect.left;
reply->y -= win->client_rect.top;
win = win->parent;
}
}
}
/* 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)
{
struct window *win = get_window( req->window );
if (!win) return;
if (win->win_region)
{
rectangle_t *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;
}
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;
struct window *ptr, *win = get_window( req->window );
if (!win || !win->parent || !is_visible( win )) return; /* nothing to do */
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, &req->rect )) continue;
if (ptr->win_region && !rect_in_region( ptr->win_region, &req->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;
}
}
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 );
}
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