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wine/server/window.c
Alexandre Julliard 0f273c17ff server: Added data_size_t type to represent sizes in the server protocol. 
Make it an unsigned int to save some space on Win64, if we need to
transfer more than 4Gb over the server pipe something is seriously
wrong.
2006-07-26 11:11:03 +02:00

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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 */
obj_handle_t handle; /* property handle (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 */
void* instance; /* creator instance */
int is_unicode; /* ANSI or unicode */
void* 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 */
/* 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;
/* retrieve a pointer to a window from its handle */
inline static 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 */
}
/* 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;
}
}
list_remove( &win->entry ); /* unlink it from the previous location */
if (parent)
{
win->parent = parent;
list_add_head( &parent->children, &win->entry );
/* 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_add_head( &win->parent->unlinked, &win->entry );
}
return 1;
}
/* 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 );
if (ptr == &win->parent->unlinked) ptr = NULL;
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 );
if (ptr == &win->parent->unlinked) ptr = NULL;
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;
}
/* 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, obj_handle_t handle, 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].handle = handle;
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].handle = handle;
}
/* remove a window property */
static obj_handle_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].handle;
}
}
/* FIXME: last error? */
return 0;
}
/* find a window property */
static obj_handle_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].handle;
}
/* FIXME: last error? */
return 0;
}
/* destroy all properties of a window */
inline static 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;
}
/* destroy a window */
void destroy_window( struct window *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))
{
assert( win->desktop->top_window == win );
win->desktop->top_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 );
if (win->text) free( win->text );
memset( win, 0x55, sizeof(*win) + win->nb_extra_bytes - 1 );
free( win );
}
/* 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, void *instance )
{
int extra_bytes;
struct window *win;
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 (!(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 = NULL;
win->is_unicode = 1;
win->user_data = NULL;
win->text = NULL;
win->paint_flags = 0;
win->prop_inuse = 0;
win->prop_alloc = 0;
win->properties = NULL;
win->nb_extra_bytes = extra_bytes;
memset( win->extra_bytes, 0, extra_bytes );
list_init( &win->children );
list_init( &win->unlinked );
/* parent must be on the same desktop */
if (parent && parent->desktop != desktop)
{
set_error( STATUS_ACCESS_DENIED );
goto failed;
}
/* if no parent, class must be the desktop */
if (!parent && !is_desktop_class( class ))
{
set_error( STATUS_ACCESS_DENIED );
goto failed;
}
/* 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 );
assert( !desktop->top_window );
desktop->top_window = win;
set_process_default_desktop( current->process, desktop, current->desktop );
}
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, int create )
{
struct window *top_window;
struct desktop *desktop = get_thread_desktop( thread, 0 );
if (!desktop) return NULL;
if (!(top_window = desktop->top_window) && create)
{
if ((top_window = create_window( NULL, NULL, DESKTOP_ATOM, 0 )))
{
detach_window_thread( top_window );
top_window->style = WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
}
}
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 && win->parent && 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 && win->parent)
{
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 );
}
/* 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;
}
/* 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; 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 (!get_window_children_from_point( top, x - top->client_rect.left,
y - top->client_rect.top, 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, 0 );
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; win = win->parent)
{
*x += win->client_rect.left;
*y += 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 )
{
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);
}
/* 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, struct window *top, 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 != top && 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;
}
offset_x = win->window_rect.left;
offset_y = win->window_rect.top;
/* clip children */
if (flags & DCX_CLIPCHILDREN)
{
if (!clip_children( win, NULL, region, win->client_rect.left, win->client_rect.top ))
goto error;
}
/* clip siblings of ancestors */
if (top && top != win && (tmp = create_empty_region()) != NULL)
{
while (win != top && win->parent)
{
if (win->style & WS_CLIPSIBLINGS)
{
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;
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;
}
/* 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 )
{
struct region *tmp = create_empty_region();
if (!tmp) return NULL;
/* get bounding rect in client coords */
if (frame) set_region_rect( tmp, &win->window_rect );
else set_region_client_rect( tmp, win );
offset_region( tmp, -win->client_rect.left, -win->client_rect.top );
/* intersect specified region with bounding rect */
if (region && !intersect_region( tmp, region, tmp )) goto done;
if (is_region_empty( tmp )) goto done;
/* map it 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_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;
}
/* 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 the update region of a window on all parents; helper for redraw_window */
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;
}
}
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 );
}
if (flags & RDW_UPDATENOW)
{
validate_parents( win );
flags &= ~RDW_UPDATENOW;
}
/* 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) ret |= UPDATE_PAINT;
}
if (flags & UPDATE_INTERNALPAINT)
{
if (win->paint_flags & PAINT_INTERNAL) ret |= UPDATE_INTERNALPAINT;
}
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 a region of a window, looking for the top most parent that needs to be exposed */
/* the region is in window coordinates */
static void expose_window( struct window *win, struct window *top, struct region *region )
{
struct window *parent, *ptr;
int offset_x, offset_y;
/* find the top most parent that doesn't clip either siblings or children */
for (parent = ptr = win; ptr != top; ptr = ptr->parent)
{
if (!(ptr->style & WS_CLIPCHILDREN)) parent = ptr;
if (!(ptr->style & WS_CLIPSIBLINGS)) parent = ptr->parent;
}
if (parent == win && parent != top && win->parent)
parent = win->parent; /* always go up at least one level if possible */
offset_x = win->window_rect.left - win->client_rect.left;
offset_y = win->window_rect.top - win->client_rect.top;
for (ptr = win; ptr != parent; ptr = ptr->parent)
{
offset_x += ptr->client_rect.left;
offset_y += ptr->client_rect.top;
}
offset_region( region, offset_x, offset_y );
redraw_window( parent, region, 0, RDW_INVALIDATE | RDW_ERASE | RDW_ALLCHILDREN );
offset_region( region, -offset_x, -offset_y );
}
/* 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, *new_vis_rgn;
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;
struct window *top = get_top_clipping_window( win );
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, top, 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)
{
list_remove( &win->entry ); /* unlink it from the previous location */
if (previous) list_add_after( &previous->entry, &win->entry );
else list_add_head( &win->parent->children, &win->entry );
}
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;
if (!(new_vis_rgn = get_visible_region( win, top, DCX_WINDOW )))
{
free_region( old_vis_rgn );
clear_error(); /* ignore error since the window info has been modified already */
return;
}
/* expose anything revealed by the change */
if (!(swp_flags & SWP_NOREDRAW))
{
offset_region( old_vis_rgn, old_window_rect.left - window_rect->left,
old_window_rect.top - window_rect->top );
if (xor_region( new_vis_rgn, old_vis_rgn, new_vis_rgn ))
expose_window( win, top, new_vis_rgn );
}
free_region( old_vis_rgn );
if (!(win->style & WS_VISIBLE))
{
/* clear the update region since the window is no longer visible */
validate_whole_window( win );
goto done;
}
/* crop update region to the new window rect */
if (win->update_region &&
(window_rect->right - window_rect->left < old_window_rect.right - old_window_rect.left ||
window_rect->bottom - window_rect->top < old_window_rect.bottom - old_window_rect.top))
{
struct region *tmp = create_empty_region();
if (tmp)
{
set_region_rect( tmp, window_rect );
offset_region( tmp, -window_rect->left, -window_rect->top );
if (intersect_region( tmp, win->update_region, tmp ))
set_update_region( win, tmp );
else
free_region( tmp );
}
}
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_FRAMECHANGED) ||
memcmp( window_rect, &old_window_rect, sizeof(old_window_rect) ) ||
memcmp( visible_rect, &old_visible_rect, sizeof(old_visible_rect) ) ||
memcmp( client_rect, &old_client_rect, sizeof(old_client_rect) ))
{
struct region *tmp = create_empty_region();
if (tmp)
{
/* subtract the valid portion of client rect from the total region */
if (!memcmp( client_rect, &old_client_rect, sizeof(old_client_rect) ))
set_region_rect( tmp, client_rect );
else if (valid_rects)
set_region_rect( tmp, &valid_rects[0] );
set_region_rect( new_vis_rgn, window_rect );
if (subtract_region( tmp, new_vis_rgn, tmp ))
{
offset_region( tmp, -client_rect->left, -client_rect->top );
redraw_window( win, tmp, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN );
}
free_region( tmp );
}
}
done:
free_region( new_vis_rgn );
clear_error(); /* we ignore out of memory errors once the new rects have been set */
}
/* create a window */
DECL_HANDLER(create_window)
{
struct window *win, *parent, *owner = NULL;
reply->handle = 0;
if (!req->parent) parent = get_desktop_window( current, 0 );
else if (!(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 (!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;
}
if (!(win = create_window( parent, owner, req->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 window *win = get_desktop_window( current, req->force );
if (win) reply->handle = win->handle;
}
/* set a window owner */
DECL_HANDLER(set_window_owner)
{
struct window *win = get_window( req->handle );
struct window *owner = NULL;
if (!win) return;
if (req->owner && !(owner = get_window( req->owner ))) return;
if (is_desktop_window(win))
{
set_error( STATUS_ACCESS_DENIED );
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) win->ex_style = req->ex_style;
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 *ptr, *parent = get_window( req->parent );
int total = 0;
user_handle_t *data;
data_size_t len;
if (parent)
{
LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
{
if (req->atom && get_class_atom(ptr->class) != req->atom) continue;
if (req->tid && get_thread_id(ptr->thread) != req->tid) continue;
total++;
}
}
reply->count = total;
len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
if (len && ((data = set_reply_data_size( len ))))
{
LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
{
if (len < sizeof(*data)) break;
if (req->atom && get_class_atom(ptr->class) != req->atom) continue;
if (req->tid && get_thread_id(ptr->thread) != req->tid) continue;
*data++ = ptr->handle;
len -= sizeof(*data);
}
}
}
/* 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 ((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))
{
if (!req->previous) /* special case: HWND_TOP */
{
if (get_first_child(win->parent) == win) flags |= SWP_NOZORDER;
}
else if (req->previous == (user_handle_t)1) /* special case: HWND_BOTTOM */
{
previous = get_last_child( win->parent );
}
else
{
if (!(previous = get_window( req->previous ))) return;
/* previous must be a sibling */
if (previous->parent != win->parent)
{
set_error( STATUS_INVALID_PARAMETER );
return;
}
}
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;
}
/* 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;
}
if (win->text) 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)
{
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)
{
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, top, 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_org_x = top->visible_rect.left;
reply->top_org_y = top->visible_rect.top;
reply->win_org_x = (req->flags & DCX_WINDOW) ? win->window_rect.left : win->client_rect.left;
reply->win_org_y = (req->flags & DCX_WINDOW) ? win->window_rect.top : win->client_rect.top;
client_to_screen( top->parent, &reply->top_org_x, &reply->top_org_y );
client_to_screen( win->parent, &reply->win_org_x, &reply->win_org_y );
}
/* 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;
}
if (win->win_region) free_region( win->win_region );
win->win_region = region;
}
/* 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;
}
}
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_whole_window( win );
}
else
{
if (reply->flags & UPDATE_NONCLIENT) validate_non_client( win );
if (reply->flags & UPDATE_ERASE)
{
win->paint_flags &= ~PAINT_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 */
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 window *win = get_window( req->window );
if (!win) return;
if (get_req_data_size())
{
atom_t atom = add_global_atom( NULL, get_req_data(), get_req_data_size() / sizeof(WCHAR) );
if (atom)
{
set_property( win, atom, req->handle, PROP_TYPE_STRING );
release_global_atom( NULL, atom );
}
}
else set_property( win, req->atom, req->handle, PROP_TYPE_ATOM );
}
/* remove a window property */
DECL_HANDLER(remove_window_property)
{
struct window *win = get_window( req->window );
if (win)
{
atom_t atom = req->atom;
if (get_req_data_size()) atom = find_global_atom( NULL, get_req_data(),
get_req_data_size() / sizeof(WCHAR) );
if (atom) reply->handle = remove_property( win, atom );
}
}
/* get a window property */
DECL_HANDLER(get_window_property)
{
struct window *win = get_window( req->window );
if (win)
{
atom_t atom = req->atom;
if (get_req_data_size()) atom = find_global_atom( NULL, get_req_data(),
get_req_data_size() / sizeof(WCHAR) );
if (atom) reply->handle = 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->handle = win->properties[i].handle;
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;
}
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