window.c 94.9 KB
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/*
 * Server-side window handling
 *
 * Copyright (C) 2001 Alexandre Julliard
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 *
 * 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
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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 */

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#include "config.h"
#include "wine/port.h"

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#include <assert.h>
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#include <stdarg.h>
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#include "ntstatus.h"
#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
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#include "winternl.h"
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#include "object.h"
#include "request.h"
#include "thread.h"
#include "process.h"
#include "user.h"
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#include "unicode.h"
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/* a window property */
struct property
{
    unsigned short type;     /* property type (see below) */
    atom_t         atom;     /* property atom */
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    lparam_t       data;     /* property data (user-defined storage) */
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};

enum property_type
{
    PROP_TYPE_FREE,   /* free entry */
    PROP_TYPE_STRING, /* atom that was originally a string */
    PROP_TYPE_ATOM    /* plain atom */
};


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struct window
{
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    struct window   *parent;          /* parent window */
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    user_handle_t    owner;           /* owner of this window */
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    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 */
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    user_handle_t    handle;          /* full handle for this window */
    struct thread   *thread;          /* thread owning the window */
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    struct desktop  *desktop;         /* desktop that the window belongs to */
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    struct window_class *class;       /* window class */
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    atom_t           atom;            /* class atom */
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    user_handle_t    last_active;     /* last active popup */
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    rectangle_t      window_rect;     /* window rectangle (relative to parent client area) */
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    rectangle_t      visible_rect;    /* visible part of window rect (relative to parent client area) */
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    rectangle_t      surface_rect;    /* window surface rectangle (relative to parent client area) */
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    rectangle_t      client_rect;     /* client rectangle (relative to parent client area) */
    struct region   *win_region;      /* region for shaped windows (relative to window rect) */
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    struct region   *update_region;   /* update region (relative to window rect) */
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    unsigned int     style;           /* window style */
    unsigned int     ex_style;        /* window extended style */
    unsigned int     id;              /* window id */
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    mod_handle_t     instance;        /* creator instance */
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    unsigned int     is_unicode : 1;  /* ANSI or unicode */
    unsigned int     is_linked : 1;   /* is it linked into the parent z-order list? */
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    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 */
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    unsigned int     dpi;             /* window DPI or 0 if per-monitor aware */
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    DPI_AWARENESS    dpi_awareness;   /* DPI awareness mode */
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    lparam_t         user_data;       /* user-specific data */
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    WCHAR           *text;            /* window caption text */
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    data_size_t      text_len;        /* length of window caption */
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    unsigned int     paint_flags;     /* various painting flags */
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    int              prop_inuse;      /* number of in-use window properties */
    int              prop_alloc;      /* number of allocated window properties */
    struct property *properties;      /* window properties array */
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    int              nb_extra_bytes;  /* number of extra bytes */
    char             extra_bytes[1];  /* extra bytes storage */
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};

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/* flags that can be set by the client */
#define PAINT_HAS_SURFACE        SET_WINPOS_PAINT_SURFACE
#define PAINT_HAS_PIXEL_FORMAT   SET_WINPOS_PIXEL_FORMAT
#define PAINT_CLIENT_FLAGS       (PAINT_HAS_SURFACE | PAINT_HAS_PIXEL_FORMAT)
/* flags only manipulated by the server */
#define PAINT_INTERNAL           0x0010  /* internal WM_PAINT pending */
#define PAINT_ERASE              0x0020  /* needs WM_ERASEBKGND */
#define PAINT_NONCLIENT          0x0040  /* needs WM_NCPAINT */
#define PAINT_DELAYED_ERASE      0x0080  /* still needs erase after WM_ERASEBKGND */
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#define PAINT_PIXEL_FORMAT_CHILD 0x0100  /* at least one child has a custom pixel format */
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/* growable array of user handles */
struct user_handle_array
{
    user_handle_t *handles;
    int            count;
    int            total;
};

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static const rectangle_t empty_rect;

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/* global window pointers */
static struct window *shell_window;
static struct window *shell_listview;
static struct window *progman_window;
static struct window *taskman_window;
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/* 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)

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/* retrieve a pointer to a window from its handle */
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static inline struct window *get_window( user_handle_t handle )
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{
    struct window *ret = get_user_object( handle, USER_WINDOW );
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    if (!ret) set_win32_error( ERROR_INVALID_WINDOW_HANDLE );
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    return ret;
}

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/* 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 */
}

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/* 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;
}

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/* set the PAINT_PIXEL_FORMAT_CHILD flag on all the parents */
/* note: we never reset the flag, it's just a heuristic */
static inline void update_pixel_format_flags( struct window *win )
{
    for (win = win->parent; win && win->parent; win = win->parent)
        win->paint_flags |= PAINT_PIXEL_FORMAT_CHILD;
}

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/* get the per-monitor DPI for a window */
static unsigned int get_monitor_dpi( struct window *win )
{
    /* FIXME: we return the desktop window DPI for now */
    while (!is_desktop_window( win )) win = win->parent;
    return win->dpi ? win->dpi : USER_DEFAULT_SCREEN_DPI;
}

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/* 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 */
        {
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            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;
                }
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                entry = entry->next;
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            }
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        }
        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;
}

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/* 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 )
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{
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    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;
        }
    }

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    if (parent)
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    {
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        win->parent = parent;
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        link_window( win, WINPTR_TOP );
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        if (!is_desktop_window( parent ))
        {
            win->dpi = parent->dpi;
            win->dpi_awareness = parent->dpi_awareness;
        }
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        /* 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))
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            attach_thread_input( win->thread, parent->thread );
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        if (win->paint_flags & (PAINT_HAS_PIXEL_FORMAT | PAINT_PIXEL_FORMAT_CHILD))
            update_pixel_format_flags( win );
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    }
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    else  /* move it to parent unlinked list */
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    {
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        list_remove( &win->entry );  /* unlink it from the previous location */
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        list_add_head( &win->parent->unlinked, &win->entry );
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        win->is_linked = 0;
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    }
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    return 1;
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}

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/* 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;
}

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/* set a window property */
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static void set_property( struct window *win, atom_t atom, lparam_t data, enum property_type type )
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{
    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;
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            win->properties[i].data = data;
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            return;
        }
    }

    /* need to add an entry */
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    if (!grab_global_atom( NULL, atom )) return;
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    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 );
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                release_global_atom( NULL, atom );
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                return;
            }
            win->prop_alloc += 16;
            win->properties = new_props;
        }
        free = win->prop_inuse++;
    }
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    win->properties[free].atom = atom;
    win->properties[free].type = type;
    win->properties[free].data = data;
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}

/* remove a window property */
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static lparam_t remove_property( struct window *win, atom_t atom )
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{
    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)
        {
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            release_global_atom( NULL, atom );
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            win->properties[i].type = PROP_TYPE_FREE;
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            return win->properties[i].data;
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        }
    }
    /* FIXME: last error? */
    return 0;
}

/* find a window property */
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static lparam_t get_property( struct window *win, atom_t atom )
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{
    int i;

    for (i = 0; i < win->prop_inuse; i++)
    {
        if (win->properties[i].type == PROP_TYPE_FREE) continue;
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        if (win->properties[i].atom == atom) return win->properties[i].data;
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    }
    /* FIXME: last error? */
    return 0;
}

/* destroy all properties of a window */
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static inline void destroy_properties( struct window *win )
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{
    int i;

    if (!win->properties) return;
    for (i = 0; i < win->prop_inuse; i++)
    {
        if (win->properties[i].type == PROP_TYPE_FREE) continue;
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        release_global_atom( NULL, win->properties[i].atom );
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    }
    free( win->properties );
}

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/* detach a window from its owner thread but keep the window around */
static void detach_window_thread( struct window *win )
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{
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    struct thread *thread = win->thread;

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    if (!thread) return;
    if (thread->queue)
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    {
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        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 );
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    }
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    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;
}

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/* 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;
}

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/* get the top window size of a given desktop */
void get_top_window_rectangle( struct desktop *desktop, rectangle_t *rect )
{
    struct window *win = desktop->top_window;
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    *rect = win ? win->window_rect : empty_rect;
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}

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/* post a message to the desktop window */
void post_desktop_message( struct desktop *desktop, unsigned int message,
                           lparam_t wparam, lparam_t lparam )
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{
    struct window *win = desktop->top_window;
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    if (win && win->thread) post_message( win->handle, message, wparam, lparam );
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}

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/* create a new window structure (note: the window is not linked in the window tree) */
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static struct window *create_window( struct window *parent, struct window *owner,
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                                     atom_t atom, mod_handle_t instance )
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{
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    int extra_bytes;
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    struct window *win = NULL;
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    struct desktop *desktop;
    struct window_class *class;

    if (!(desktop = get_thread_desktop( current, DESKTOP_CREATEWINDOW ))) return NULL;
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    if (!(class = grab_class( current->process, atom, instance, &extra_bytes )))
    {
        release_object( desktop );
        return NULL;
    }
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    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;
    }

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    if (!(win = mem_alloc( sizeof(*win) + extra_bytes - 1 ))) goto failed;
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    if (!(win->handle = alloc_user_handle( win, USER_WINDOW ))) goto failed;
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    win->parent         = parent;
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    win->owner          = owner ? owner->handle : 0;
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    win->thread         = current;
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    win->desktop        = desktop;
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    win->class          = class;
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    win->atom           = atom;
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    win->last_active    = win->handle;
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    win->win_region     = NULL;
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    win->update_region  = NULL;
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    win->style          = 0;
    win->ex_style       = 0;
    win->id             = 0;
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    win->instance       = 0;
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    win->is_unicode     = 1;
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    win->is_linked      = 0;
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    win->is_layered     = 0;
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    win->dpi_awareness  = DPI_AWARENESS_PER_MONITOR_AWARE;
    win->dpi            = 0;
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    win->user_data      = 0;
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    win->text           = NULL;
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    win->text_len       = 0;
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    win->paint_flags    = 0;
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    win->prop_inuse     = 0;
    win->prop_alloc     = 0;
    win->properties     = NULL;
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    win->nb_extra_bytes = extra_bytes;
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    win->window_rect = win->visible_rect = win->surface_rect = win->client_rect = empty_rect;
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    memset( win->extra_bytes, 0, extra_bytes );
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    list_init( &win->children );
    list_init( &win->unlinked );
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    /* if parent belongs to a different thread and the window isn't */
    /* top-level, attach the two threads */
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    if (parent && parent->thread && parent->thread != current && !is_desktop_window(parent))
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    {
        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;
    }

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    /* put it on parent unlinked list */
    if (parent) list_add_head( &parent->unlinked, &win->entry );
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    else
    {
        list_init( &win->entry );
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        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;
        }
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    }
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    current->desktop_users++;
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    return win;
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failed:
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    if (win)
    {
        if (win->handle) free_user_handle( win->handle );
        free( win );
    }
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    release_object( desktop );
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    release_class( class );
    return NULL;
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}

/* 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;
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        if (is_desktop_window( win )) detach_window_thread( win );
        else destroy_window( win );
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    }
}

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/* get the desktop window */
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static struct window *get_desktop_window( struct thread *thread )
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{
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    struct window *top_window;
    struct desktop *desktop = get_thread_desktop( thread, 0 );

    if (!desktop) return NULL;
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    top_window = desktop->top_window;
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    release_object( desktop );
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    return top_window;
}

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/* check whether child is a descendant of parent */
int is_child_window( user_handle_t parent, user_handle_t child )
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{
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    struct window *child_ptr = get_user_object( child, USER_WINDOW );
    struct window *parent_ptr = get_user_object( parent, USER_WINDOW );
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    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;
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}

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/* check if window can be set as foreground window */
int is_valid_foreground_window( user_handle_t window )
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{
    struct window *win = get_user_object( window, USER_WINDOW );
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    return win && (win->style & (WS_POPUP|WS_CHILD)) != WS_CHILD;
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}

/* 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;

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    /* set last active for window and its owners */
    owner = win;
    while (owner)
    {
        owner->last_active = win->handle;
        owner = get_user_object( owner->owner, USER_WINDOW );
    }
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    return 1;
}

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/* 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 );
}

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/* map a point between different DPI scaling levels */
static void map_dpi_point( struct window *win, int *x, int *y, unsigned int from, unsigned int to )
{
    if (!from) from = get_monitor_dpi( win );
    if (!to) to = get_monitor_dpi( win );
    if (from == to) return;
    *x = scale_dpi( *x, from, to );
    *y = scale_dpi( *y, from, to );
}

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/* map a window rectangle between different DPI scaling levels */
static void map_dpi_rect( struct window *win, rectangle_t *rect, unsigned int from, unsigned int to )
{
    if (!from) from = get_monitor_dpi( win );
    if (!to) to = get_monitor_dpi( win );
    if (from == to) return;
    scale_dpi_rect( rect, from, to );
}

654 655 656 657 658 659 660 661 662
/* map a region between different DPI scaling levels */
static void map_dpi_region( struct window *win, struct region *region, unsigned int from, unsigned int to )
{
    if (!from) from = get_monitor_dpi( win );
    if (!to) to = get_monitor_dpi( win );
    if (from == to) return;
    scale_region( region, from, to );
}

663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685
/* 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 screen to client coords and dpi */
static void screen_to_client( struct window *win, int *x, int *y, unsigned int dpi )
{
    int offset_x = 0, offset_y = 0;

    if (is_desktop_window( win )) return;

    client_to_screen( win, &offset_x, &offset_y );
    map_dpi_point( win, x, y, dpi, win->dpi );
    *x -= offset_x;
    *y -= offset_y;
}

686 687 688
/* check if window and all its ancestors are visible */
static int is_visible( const struct window *win )
{
689
    while (win)
690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706
    {
        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 );
}

707 708 709 710 711 712 713
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);
}

714 715
/* check if point is inside the window, and map to window dpi */
static int is_point_in_window( struct window *win, int *x, int *y, unsigned int dpi )
716 717 718 719 720 721
{
    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 */
722 723
    map_dpi_point( win, x, y, dpi, win->dpi );
    if (!point_in_rect( &win->visible_rect, *x, *y ))
724 725
        return 0;  /* not in window */
    if (win->win_region &&
726
        !point_in_region( win->win_region, *x - win->window_rect.left, *y - win->window_rect.top ))
727 728 729 730
        return 0;  /* not in window region */
    return 1;
}

731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753
/* 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;
}

754 755 756
/* 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 )
{
757
    struct window *ptr;
758

759
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
760
    {
761 762 763
        int x_child = x, y_child = y;

        if (!is_point_in_window( ptr, &x_child, &y_child, parent->dpi )) continue;  /* skip it */
764 765 766 767 768

        /* 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 */
769
        if (!point_in_rect( &ptr->client_rect, x_child, y_child )) return ptr;
770

771 772
        return child_window_from_point( ptr, x_child - ptr->client_rect.left,
                                        y_child - ptr->client_rect.top );
773 774 775 776
    }
    return parent;  /* not found any child */
}

777 778 779 780 781 782
/* 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;

783
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
784
    {
785 786 787
        int x_child = x, y_child = y;

        if (!is_point_in_window( ptr, &x_child, &y_child, parent->dpi )) continue;  /* skip it */
788 789

        /* if point is in client area, and window is not minimized or disabled, check children */
790
        if (!(ptr->style & (WS_MINIMIZE|WS_DISABLED)) && point_in_rect( &ptr->client_rect, x_child, y_child ))
791
        {
792 793
            if (!get_window_children_from_point( ptr, x_child - ptr->client_rect.left,
                                                 y_child - ptr->client_rect.top, array ))
794 795 796 797 798 799 800 801 802
                return 0;
        }

        /* now add window to the array */
        if (!add_handle_to_array( array, ptr->handle )) return 0;
    }
    return 1;
}

803 804
/* get handle of root of top-most window containing point */
user_handle_t shallow_window_from_point( struct desktop *desktop, int x, int y )
805
{
806
    struct window *ptr;
807

808
    if (!desktop->top_window) return 0;
809 810 811

    LIST_FOR_EACH_ENTRY( ptr, &desktop->top_window->children, struct window, entry )
    {
812 813 814
        int x_child = x, y_child = y;

        if (!is_point_in_window( ptr, &x_child, &y_child, 0 )) continue;  /* skip it */
815 816 817 818 819 820 821 822 823 824 825 826
        return ptr->handle;
    }
    return desktop->top_window->handle;
}

/* return thread of top-most window containing point (in absolute coords) */
struct thread *window_thread_from_point( user_handle_t scope, int x, int y )
{
    struct window *win = get_user_object( scope, USER_WINDOW );

    if (!win) return NULL;

827 828 829 830
    screen_to_client( win, &x, &y, 0 );
    win = child_window_from_point( win, x, y );
    if (!win->thread) return NULL;
    return (struct thread *)grab_object( win->thread );
831
}
832

833
/* return list of all windows containing point (in absolute coords) */
834 835
static int all_windows_from_point( struct window *top, int x, int y, unsigned int dpi,
                                   struct user_handle_array *array )
836
{
837
    if (!is_desktop_window( top ) && !is_desktop_window( top->parent ))
838
    {
839 840
        screen_to_client( top->parent, &x, &y, dpi );
        dpi = top->parent->dpi;
841 842
    }

843
    if (!is_point_in_window( top, &x, &y, dpi )) return 1;
844
    /* if point is in client area, and window is not minimized or disabled, check children */
845
    if (!(top->style & (WS_MINIMIZE|WS_DISABLED)) && point_in_rect( &top->client_rect, x, y ))
846
    {
847 848 849 850 851 852
        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;
853 854 855 856 857 858 859
    }
    /* now add window to the array */
    if (!add_handle_to_array( array, top->handle )) return 0;
    return 1;
}


860 861 862 863 864 865 866
/* 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 );
}
867

868 869 870 871 872 873 874 875

/* 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);
}


876 877 878 879 880
/* 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;

881
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
882 883
    {
        if (!(ptr->style & WS_VISIBLE)) continue;
884
        if (ptr->thread == thread && win_needs_repaint( ptr ))
885
            ret = ptr;
886
        else if (!(ptr->style & WS_MINIMIZE)) /* explore its children */
887
            ret = find_child_to_repaint( ptr, thread );
888
        if (ret) break;
889 890 891 892 893
    }

    if (ret && (ret->ex_style & WS_EX_TRANSPARENT))
    {
        /* transparent window, check for non-transparent sibling to paint first */
894
        for (ptr = get_next_window(ret); ptr; ptr = get_next_window(ptr))
895 896 897
        {
            if (!(ptr->style & WS_VISIBLE)) continue;
            if (ptr->ex_style & WS_EX_TRANSPARENT) continue;
898 899
            if (ptr->thread != thread) continue;
            if (win_needs_repaint( ptr )) return ptr;
900 901 902 903 904 905
        }
    }
    return ret;
}


906
/* find a window that needs to receive a WM_PAINT; also clear its internal paint flag */
907 908
user_handle_t find_window_to_repaint( user_handle_t parent, struct thread *thread )
{
909
    struct window *ptr, *win, *top_window = get_desktop_window( thread );
910 911

    if (!top_window) return 0;
912

913 914 915
    if (top_window->thread == thread && win_needs_repaint( top_window )) win = top_window;
    else win = find_child_to_repaint( top_window, thread );

916
    if (win && parent)
917 918 919
    {
        /* check that it is a child of the specified parent */
        for (ptr = win; ptr; ptr = ptr->parent)
920
            if (ptr->handle == parent) break;
921
        /* otherwise don't return any window, we don't repaint a child before its parent */
922
        if (!ptr) win = NULL;
923
    }
924 925 926
    if (!win) return 0;
    win->paint_flags &= ~PAINT_INTERNAL;
    return win->handle;
927 928 929
}


930 931 932 933 934 935 936 937 938 939 940 941
/* 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;
}


942 943 944 945
/* 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)
946
        offset_rect( rect, win->client_rect.left, win->client_rect.top );
947 948
}

949 950 951
/* map the region from window to screen coordinates */
static inline void map_win_region_to_screen( struct window *win, struct region *region )
{
952 953 954 955 956 957 958
    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 );
    }
959 960 961
}


962 963 964 965 966 967 968 969
/* 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;
970
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
971
    {
972
        if (ptr == last) break;
973 974
        if (!(ptr->style & WS_VISIBLE)) continue;
        if (ptr->ex_style & WS_EX_TRANSPARENT) continue;
975
        set_region_rect( tmp, &ptr->visible_rect );
976 977 978 979 980
        if (ptr->win_region && !intersect_window_region( tmp, ptr ))
        {
            free_region( tmp );
            return NULL;
        }
981 982 983 984 985 986 987 988 989
        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;
}


990 991 992 993 994
/* 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;

995
    intersect_rect( &rect, &win->window_rect, &win->client_rect );
996 997 998 999 1000 1001 1002 1003 1004 1005 1006
    intersect_rect( &rect, &rect, &win->surface_rect );
    set_region_rect( region, &rect );
}


/* set the region to the visible rect clipped by the window surface, in parent-relative coordinates */
static void set_region_visible_rect( struct region *region, struct window *win )
{
    rectangle_t rect;

    intersect_rect( &rect, &win->visible_rect, &win->surface_rect );
1007 1008 1009 1010
    set_region_rect( region, &rect );
}


1011 1012 1013
/* get the top-level window to clip against for a given window */
static inline struct window *get_top_clipping_window( struct window *win )
{
1014 1015
    while (!(win->paint_flags & PAINT_HAS_SURFACE) && win->parent && !is_desktop_window(win->parent))
        win = win->parent;
1016 1017 1018 1019
    return win;
}


1020
/* compute the visible region of a window, in window coordinates */
1021
static struct region *get_visible_region( struct window *win, unsigned int flags )
1022
{
1023
    struct region *tmp = NULL, *region;
1024 1025 1026 1027 1028 1029
    int offset_x, offset_y;

    if (!(region = create_empty_region())) return NULL;

    /* first check if all ancestors are visible */

1030
    if (!is_visible( win )) return region;  /* empty region */
1031

1032 1033 1034 1035 1036 1037
    if (is_desktop_window( win ))
    {
        set_region_rect( region, &win->window_rect );
        return region;
    }

1038
    /* create a region relative to the window itself */
1039

1040
    if ((flags & DCX_PARENTCLIP) && !is_desktop_window( win->parent ))
1041
    {
1042 1043
        set_region_client_rect( region, win->parent );
        offset_region( region, -win->parent->client_rect.left, -win->parent->client_rect.top );
1044 1045 1046
    }
    else if (flags & DCX_WINDOW)
    {
1047
        set_region_visible_rect( region, win );
1048
        if (win->win_region && !intersect_window_region( region, win )) goto error;
1049 1050 1051
    }
    else
    {
1052
        set_region_client_rect( region, win );
1053
        if (win->win_region && !intersect_window_region( region, win )) goto error;
1054 1055 1056 1057 1058 1059
    }

    /* clip children */

    if (flags & DCX_CLIPCHILDREN)
    {
1060
        if (!clip_children( win, NULL, region, win->client_rect.left, win->client_rect.top )) goto error;
1061 1062 1063 1064
    }

    /* clip siblings of ancestors */

1065 1066
    offset_x = win->window_rect.left;
    offset_y = win->window_rect.top;
1067

1068
    if ((tmp = create_empty_region()) != NULL)
1069
    {
1070
        while (!is_desktop_window( win->parent ))
1071
        {
1072
            /* we don't clip out top-level siblings as that's up to the native windowing system */
1073
            if (win->style & WS_CLIPSIBLINGS)
1074 1075 1076 1077 1078 1079
            {
                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;
1080 1081 1082
            offset_x += win->client_rect.left;
            offset_y += win->client_rect.top;
            offset_region( region, win->client_rect.left, win->client_rect.top );
1083
            set_region_client_rect( tmp, win );
1084 1085
            if (win->win_region && !intersect_window_region( tmp, win )) goto error;
            if (!intersect_region( region, region, tmp )) goto error;
1086 1087 1088 1089
            if (is_region_empty( region )) break;
        }
        free_region( tmp );
    }
1090
    offset_region( region, -offset_x, -offset_y );  /* make it relative to target window */
1091 1092 1093
    return region;

error:
1094
    if (tmp) free_region( tmp );
1095 1096 1097 1098 1099
    free_region( region );
    return NULL;
}


1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119
/* clip all children with a custom pixel format out of the visible region */
static struct region *clip_pixel_format_children( struct window *parent, struct region *parent_clip,
                                                  struct region *region, int offset_x, int offset_y )
{
    struct window *ptr;
    struct region *clip = create_empty_region();

    if (!clip) return NULL;

    LIST_FOR_EACH_ENTRY_REV( ptr, &parent->children, struct window, entry )
    {
        if (!(ptr->style & WS_VISIBLE)) continue;
        if (ptr->ex_style & WS_EX_TRANSPARENT) continue;

        /* add the visible rect */
        set_region_rect( clip, &ptr->visible_rect );
        if (ptr->win_region && !intersect_window_region( clip, ptr )) break;
        offset_region( clip, offset_x, offset_y );
        if (!intersect_region( clip, clip, parent_clip )) break;
        if (!union_region( region, region, clip )) break;
1120
        if (!(ptr->paint_flags & (PAINT_HAS_PIXEL_FORMAT | PAINT_PIXEL_FORMAT_CHILD))) continue;
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153

        /* subtract the client rect if it uses a custom pixel format */
        set_region_rect( clip, &ptr->client_rect );
        if (ptr->win_region && !intersect_window_region( clip, ptr )) break;
        offset_region( clip, offset_x, offset_y );
        if (!intersect_region( clip, clip, parent_clip )) break;
        if ((ptr->paint_flags & PAINT_HAS_PIXEL_FORMAT) && !subtract_region( region, region, clip ))
            break;

        if (!clip_pixel_format_children( ptr, clip, region, offset_x + ptr->client_rect.left,
                                         offset_y + ptr->client_rect.top ))
            break;
    }
    free_region( clip );
    return region;
}


/* compute the visible surface region of a window, in parent coordinates */
static struct region *get_surface_region( struct window *win )
{
    struct region *region, *clip;
    int offset_x, offset_y;

    /* create a region relative to the window itself */

    if (!(region = create_empty_region())) return NULL;
    if (!(clip = create_empty_region())) goto error;
    set_region_rect( region, &win->visible_rect );
    if (win->win_region && !intersect_window_region( region, win )) goto error;
    set_region_rect( clip, &win->client_rect );
    if (win->win_region && !intersect_window_region( clip, win )) goto error;

1154 1155 1156
    if ((win->paint_flags & PAINT_HAS_PIXEL_FORMAT) && !subtract_region( region, region, clip ))
        goto error;

1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177
    /* clip children */

    if (!is_desktop_window(win))
    {
        offset_x = win->client_rect.left;
        offset_y = win->client_rect.top;
    }
    else offset_x = offset_y = 0;

    if (!clip_pixel_format_children( win, clip, region, offset_x, offset_y )) goto error;

    free_region( clip );
    return region;

error:
    if (clip) free_region( clip );
    free_region( region );
    return NULL;
}


1178 1179 1180 1181 1182
/* 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;
1183
    if (!win->class) set_error( STATUS_ACCESS_DENIED );
1184 1185 1186
    return win->class;
}

1187 1188 1189 1190
/* 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 )
{
1191
    int offset_x = win->window_rect.left, offset_y = win->window_rect.top;
1192 1193 1194

    *rect = frame ? win->window_rect : win->client_rect;

1195 1196 1197 1198
    if (!(win->style & WS_VISIBLE)) return 0;
    if (is_desktop_window( win )) return 1;

    while (!is_desktop_window( win->parent ))
1199 1200 1201
    {
        win = win->parent;
        if (!(win->style & WS_VISIBLE) || win->style & WS_MINIMIZE) return 0;
1202 1203 1204
        offset_x += win->client_rect.left;
        offset_y += win->client_rect.top;
        offset_rect( rect, win->client_rect.left, win->client_rect.top );
1205 1206 1207 1208 1209 1210 1211
        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;
}

1212 1213 1214 1215
/* 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 )
{
1216 1217
    rectangle_t rect;
    struct region *tmp;
1218

1219 1220 1221
    if (!get_window_visible_rect( win, &rect, frame )) return NULL;
    if (!(tmp = create_empty_region())) return NULL;
    set_region_rect( tmp, &rect );
1222

1223 1224 1225 1226 1227
    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 );
1228

1229 1230 1231
        /* intersect specified region with bounding rect */
        if (!intersect_region( tmp, region, tmp )) goto done;
        if (is_region_empty( tmp )) goto done;
1232

1233 1234 1235 1236
        /* 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 );
    }
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    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
    {
Rob Shearman's avatar
Rob Shearman committed
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        if (win->update_region)
        {
            inc_window_paint_count( win, -1 );
            free_region( win->update_region );
        }
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        win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE | PAINT_NONCLIENT);
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        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;
}


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/* 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;
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    struct region *tmp;
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    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 );
    }
}


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/* 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;

1334
    if ((tmp = create_empty_region()))
1335
    {
1336
        set_region_rect( tmp, &rect );
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        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 );
    }
}


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/* 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);
    }
}


1373
/* validate the update region of a window on all parents; helper for get_update_region */
1374 1375 1376 1377 1378 1379 1380 1381
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;

1382
    while (win->parent)
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    {
        /* 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 )
{
1414
    struct region *child_rgn, *tmp;
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    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 );
1444
            if (flags & RDW_NOERASE) win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE);
1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472
        }
    }

    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;

1473
    LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry )
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    {
        if (!(child->style & WS_VISIBLE)) continue;
1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486
        if (!(child_rgn = create_empty_region())) continue;
        if (copy_region( child_rgn, tmp ))
        {
            map_dpi_region( child, child_rgn, win->dpi, child->dpi );
            if (rect_in_region( child_rgn, &child->window_rect ))
            {
                offset_region( child_rgn, -child->client_rect.left, -child->client_rect.top );
                redraw_window( child, child_rgn, 1, flags );
            }
        }
        free_region( child_rgn );
1487
    }
1488

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    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)
    {
1508 1509 1510 1511 1512
        if (win->update_region)
        {
            if (win->paint_flags & PAINT_DELAYED_ERASE) ret |= UPDATE_DELAYED_ERASE;
            ret |= UPDATE_PAINT;
        }
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    }
    if (flags & UPDATE_INTERNALPAINT)
    {
1516 1517 1518 1519 1520
        if (win->paint_flags & PAINT_INTERNAL)
        {
            ret |= UPDATE_INTERNALPAINT;
            if (win->paint_flags & PAINT_DELAYED_ERASE) ret |= UPDATE_DELAYED_ERASE;
        }
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    }
    return ret;
}


/* iterate through the children of the given window until we find one with some update flags */
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static unsigned int get_child_update_flags( struct window *win, struct window *from_child,
                                            unsigned int flags, struct window **child )
1529 1530 1531 1532
{
    struct window *ptr;
    unsigned int ret = 0;

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    /* 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;

1543
    LIST_FOR_EACH_ENTRY( ptr, &win->children, struct window, entry )
1544
    {
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        if (from_child)  /* skip all children until from_child is found */
        {
            if (ptr == from_child) from_child = NULL;
            continue;
        }
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        if (!(ptr->style & WS_VISIBLE)) continue;
        if ((ret = get_update_flags( ptr, flags )) != 0)
        {
            *child = ptr;
            break;
        }
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        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;
1571
    for (ptr = from_child; ptr; ptr = ptr->parent)
1572 1573 1574 1575 1576 1577 1578 1579 1580 1581
    {
        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)))
    {
1582
        for (ptr = win->parent; ptr; ptr = ptr->parent)
1583
        {
1584 1585 1586 1587 1588
            if (!(ptr->style & WS_CLIPCHILDREN) && win_needs_repaint( ptr ))
                return 0;
        }
        if (from_child && !(flags & UPDATE_ALLCHILDREN))
        {
1589
            for (ptr = from_sibling ? from_sibling : from_child; ptr; ptr = ptr->parent)
1590 1591 1592 1593
            {
                if (!(ptr->style & WS_CLIPCHILDREN) && win_needs_repaint( ptr )) from_sibling = ptr;
                if (ptr == win) break;
            }
1594
        }
1595
    }
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    /* 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;
1628 1629 1630
}


1631 1632 1633 1634
/* 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 )
1635
{
1636
    struct region *new_vis_rgn, *exposed_rgn;
1637

1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654
    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;
        }
    }

1655
    if (win->parent && !is_desktop_window( win->parent ))
1656
    {
1657 1658 1659 1660 1661 1662 1663 1664 1665 1666
        /* 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 ))
            {
1667 1668
                /* make it relative to parent */
                offset_region( new_vis_rgn, old_window_rect->left, old_window_rect->top );
1669 1670 1671
                redraw_window( win->parent, new_vis_rgn, 0, RDW_INVALIDATE | RDW_ERASE | RDW_ALLCHILDREN );
            }
        }
1672
    }
1673 1674
    free_region( new_vis_rgn );
    return exposed_rgn;
1675 1676 1677 1678
}


/* set the window and client rectangles, updating the update region if necessary */
1679
static void set_window_pos( struct window *win, struct window *previous,
1680
                            unsigned int swp_flags, const rectangle_t *window_rect,
1681
                            const rectangle_t *client_rect, const rectangle_t *visible_rect,
1682
                            const rectangle_t *surface_rect, const rectangle_t *valid_rect )
1683
{
1684
    struct region *old_vis_rgn = NULL, *exposed_rgn = NULL;
1685
    const rectangle_t old_window_rect = win->window_rect;
1686
    const rectangle_t old_visible_rect = win->visible_rect;
1687
    const rectangle_t old_client_rect = win->client_rect;
1688
    rectangle_t rect;
1689
    int client_changed, frame_changed;
1690
    int visible = (win->style & WS_VISIBLE) || (swp_flags & SWP_SHOWWINDOW);
1691

1692
    if (win->parent && !is_visible( win->parent )) visible = 0;
1693

1694
    if (visible && !(old_vis_rgn = get_visible_region( win, DCX_WINDOW ))) return;
1695 1696 1697

    /* set the new window info before invalidating anything */

1698
    win->window_rect  = *window_rect;
1699
    win->visible_rect = *visible_rect;
1700
    win->surface_rect = *surface_rect;
1701
    win->client_rect  = *client_rect;
1702
    if (!(swp_flags & SWP_NOZORDER) && win->parent) link_window( win, previous );
1703 1704 1705
    if (swp_flags & SWP_SHOWWINDOW) win->style |= WS_VISIBLE;
    else if (swp_flags & SWP_HIDEWINDOW) win->style &= ~WS_VISIBLE;

1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716
    /* keep children at the same position relative to top right corner when the parent is mirrored */
    if (win->ex_style & WS_EX_LAYOUTRTL)
    {
        struct window *child;
        int old_size = old_client_rect.right - old_client_rect.left;
        int new_size = win->client_rect.right - win->client_rect.left;

        if (old_size != new_size) LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry )
        {
            offset_rect( &child->window_rect, new_size - old_size, 0 );
            offset_rect( &child->visible_rect, new_size - old_size, 0 );
1717
            offset_rect( &child->surface_rect, new_size - old_size, 0 );
1718 1719 1720 1721
            offset_rect( &child->client_rect, new_size - old_size, 0 );
        }
    }

1722
    /* reset cursor clip rectangle when the desktop changes size */
1723
    if (win == win->desktop->top_window) win->desktop->cursor.clip = *window_rect;
1724

1725 1726 1727
    /* if the window is not visible, everything is easy */
    if (!visible) return;

1728 1729
    /* expose anything revealed by the change */

1730
    if (!(swp_flags & SWP_NOREDRAW))
1731
        exposed_rgn = expose_window( win, &old_window_rect, old_vis_rgn );
1732 1733 1734 1735 1736

    if (!(win->style & WS_VISIBLE))
    {
        /* clear the update region since the window is no longer visible */
        validate_whole_window( win );
1737
        validate_children( win );
1738 1739 1740
        goto done;
    }

1741 1742
    /* crop update region to the new window rect */

1743
    if (win->update_region)
1744
    {
1745
        if (get_window_visible_rect( win, &rect, 1 ))
1746
        {
1747 1748 1749 1750 1751 1752 1753 1754 1755
            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 );
            }
1756
        }
1757
        else set_update_region( win, NULL ); /* visible rect is empty */
1758 1759
    }

1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770
    /* 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 );

1771 1772
    if (swp_flags & SWP_NOREDRAW) goto done;  /* do not repaint anything */

1773 1774
    /* expose the whole non-client area if it changed in any way */

1775 1776 1777
    if (swp_flags & SWP_NOCOPYBITS)
    {
        frame_changed = ((swp_flags & SWP_FRAMECHANGED) ||
1778 1779
                         memcmp( window_rect, &old_window_rect, sizeof(old_window_rect) ) ||
                         memcmp( visible_rect, &old_visible_rect, sizeof(old_visible_rect) ));
1780 1781 1782 1783 1784 1785 1786 1787 1788
        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 ||
1789 1790 1791 1792 1793
                         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);
1794 1795 1796
        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 ||
1797
                          client_rect->bottom - old_client_rect.bottom != y_offset ||
1798
                          memcmp( valid_rect, client_rect, sizeof(*client_rect) ));
1799 1800 1801
    }

    if (frame_changed || client_changed)
1802
    {
1803
        struct region *win_rgn = old_vis_rgn;  /* reuse previous region */
1804

1805
        set_region_rect( win_rgn, window_rect );
1806
        if (!is_rect_empty( valid_rect ))
1807
        {
1808
            /* subtract the valid portion of client rect from the total region */
1809 1810
            struct region *tmp = create_empty_region();
            if (tmp)
1811
            {
1812
                set_region_rect( tmp, valid_rect );
1813 1814 1815 1816 1817 1818 1819
                /* subtract update region since invalid parts of the valid rect won't be copied */
                if (win->update_region)
                {
                    offset_region( tmp, -window_rect->left, -window_rect->top );
                    subtract_region( tmp, tmp, win->update_region );
                    offset_region( tmp, window_rect->left, window_rect->top );
                }
1820 1821
                if (subtract_region( tmp, win_rgn, tmp )) win_rgn = tmp;
                else free_region( tmp );
1822 1823
            }
        }
1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835
        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;
        }
1836 1837
    }

1838 1839 1840
    if (exposed_rgn)
        redraw_window( win, exposed_rgn, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN );

1841
done:
1842
    if (old_vis_rgn) free_region( old_vis_rgn );
1843
    if (exposed_rgn) free_region( exposed_rgn );
1844 1845 1846
    clear_error();  /* we ignore out of memory errors once the new rects have been set */
}

1847

1848 1849 1850
/* set the window region, updating the update region if necessary */
static void set_window_region( struct window *win, struct region *region, int redraw )
{
1851
    struct region *old_vis_rgn = NULL, *exposed_rgn;
1852 1853 1854 1855

    /* no need to redraw if window is not visible */
    if (redraw && !is_visible( win )) redraw = 0;

1856
    if (redraw) old_vis_rgn = get_visible_region( win, DCX_WINDOW );
1857 1858 1859 1860

    if (win->win_region) free_region( win->win_region );
    win->win_region = region;

1861 1862
    /* expose anything revealed by the change */
    if (old_vis_rgn && ((exposed_rgn = expose_window( win, &win->window_rect, old_vis_rgn ))))
1863
    {
1864 1865
        redraw_window( win, exposed_rgn, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN );
        free_region( exposed_rgn );
1866 1867 1868 1869 1870 1871 1872
    }

    if (old_vis_rgn) free_region( old_vis_rgn );
    clear_error();  /* we ignore out of memory errors since the region has been set */
}


1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901
/* 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;
1902
    free_hotkeys( win->desktop, win->handle );
1903
    cleanup_clipboard_window( win->desktop, win->handle );
1904 1905 1906 1907 1908 1909 1910 1911 1912 1913
    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;
    }
1914 1915 1916 1917 1918
    else if (is_desktop_window( win->parent ))
    {
        post_message( win->parent->handle, WM_PARENTNOTIFY, WM_DESTROY, win->handle );
    }

1919 1920 1921 1922 1923 1924 1925 1926 1927 1928
    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 );
}


1929 1930
/* create a window */
DECL_HANDLER(create_window)
1931
{
1932
    struct window *win, *parent = NULL, *owner = NULL;
1933
    struct unicode_str cls_name = get_req_unicode_str();
1934
    atom_t atom;
1935

1936
    reply->handle = 0;
1937
    if (req->parent && !(parent = get_window( req->parent ))) return;
1938

1939 1940 1941 1942
    if (req->owner)
    {
        if (!(owner = get_window( req->owner ))) return;
        if (is_desktop_window(owner)) owner = NULL;
1943
        else if (parent && !is_desktop_window(parent))
1944
        {
1945
            /* an owned window must be created as top-level */
1946 1947 1948
            set_error( STATUS_ACCESS_DENIED );
            return;
        }
1949
        else /* owner must be a top-level window */
1950 1951
            while ((owner->style & (WS_POPUP|WS_CHILD)) == WS_CHILD && !is_desktop_window(owner->parent))
                owner = owner->parent;
1952
    }
1953

1954
    atom = cls_name.len ? find_global_atom( NULL, &cls_name ) : req->atom;
1955

1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967
    if (!(win = create_window( parent, owner, atom, req->instance ))) return;

    if (parent && !is_desktop_window( parent ))
    {
        win->dpi_awareness = parent->dpi_awareness;
        win->dpi = parent->dpi;
    }
    else if (!parent || req->awareness != DPI_AWARENESS_PER_MONITOR_AWARE)
    {
        win->dpi_awareness = req->awareness;
        win->dpi = req->dpi;
    }
1968

1969
    reply->handle    = win->handle;
1970 1971
    reply->parent    = win->parent ? win->parent->handle : 0;
    reply->owner     = win->owner;
1972
    reply->extra     = win->nb_extra_bytes;
1973
    reply->dpi       = win->dpi;
1974
    reply->awareness = win->dpi_awareness;
1975
    reply->class_ptr = get_class_client_ptr( win->class );
1976 1977 1978
}


1979 1980
/* set the parent of a window */
DECL_HANDLER(set_parent)
1981
{
1982
    struct window *win, *parent = NULL;
1983

1984 1985
    if (!(win = get_window( req->handle ))) return;
    if (req->parent && !(parent = get_window( req->parent ))) return;
1986

1987
    if (is_desktop_window(win))
1988 1989 1990 1991
    {
        set_error( STATUS_INVALID_PARAMETER );
        return;
    }
1992
    reply->old_parent  = win->parent->handle;
1993
    reply->full_parent = parent ? parent->handle : 0;
1994
    set_parent_window( win, parent );
1995
    reply->dpi       = win->dpi;
1996
    reply->awareness = win->dpi_awareness;
1997 1998 1999 2000 2001 2002
}


/* destroy a window */
DECL_HANDLER(destroy_window)
{
2003
    struct window *win = get_window( req->handle );
2004 2005
    if (win)
    {
2006
        if (!is_desktop_window(win)) destroy_window( win );
2007
        else if (win->thread == current) detach_window_thread( win );
2008 2009 2010 2011 2012
        else set_error( STATUS_ACCESS_DENIED );
    }
}


2013 2014 2015
/* retrieve the desktop window for the current thread */
DECL_HANDLER(get_desktop_window)
{
2016
    struct desktop *desktop = get_thread_desktop( current, 0 );
2017
    int force;
2018

2019 2020
    if (!desktop) return;

2021 2022 2023 2024
    /* if winstation is invisible, then avoid roundtrip */
    force = req->force || !(desktop->winstation->flags & WSF_VISIBLE);

    if (!desktop->top_window && force)  /* create it */
2025
    {
2026
        if ((desktop->top_window = create_window( NULL, NULL, DESKTOP_ATOM, 0 )))
2027 2028 2029 2030 2031 2032
        {
            detach_window_thread( desktop->top_window );
            desktop->top_window->style  = WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
        }
    }

2033
    if (!desktop->msg_window && force)  /* create it */
2034 2035 2036 2037
    {
        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 );
2038
        if (atom && (desktop->msg_window = create_window( NULL, NULL, atom, 0 )))
2039 2040 2041 2042 2043 2044 2045 2046 2047
        {
            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 );
2048 2049 2050
}


2051 2052 2053 2054
/* set a window owner */
DECL_HANDLER(set_window_owner)
{
    struct window *win = get_window( req->handle );
2055
    struct window *owner = NULL, *ptr;
2056

2057 2058
    if (!win) return;
    if (req->owner && !(owner = get_window( req->owner ))) return;
2059
    if (is_desktop_window(win))
2060 2061 2062 2063
    {
        set_error( STATUS_ACCESS_DENIED );
        return;
    }
2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074

    /* 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;
        }
    }

2075 2076
    reply->prev_owner = win->owner;
    reply->full_owner = win->owner = owner ? owner->handle : 0;
2077 2078 2079
}


2080
/* get information from a window handle */
2081 2082
DECL_HANDLER(get_window_info)
{
2083
    struct window *win = get_window( req->handle );
2084

2085 2086 2087 2088 2089 2090
    if (!win) return;

    reply->full_handle = win->handle;
    reply->last_active = win->handle;
    reply->is_unicode  = win->is_unicode;
    reply->awareness   = win->dpi_awareness;
2091
    reply->dpi         = win->dpi ? win->dpi : get_monitor_dpi( win );
2092 2093
    if (get_user_object( win->last_active, USER_WINDOW )) reply->last_active = win->last_active;
    if (win->thread)
2094
    {
2095 2096 2097
        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;
2098 2099
    }
}
2100 2101


2102 2103 2104 2105
/* set some information in a window */
DECL_HANDLER(set_window_info)
{
    struct window *win = get_window( req->handle );
2106

2107
    if (!win) return;
2108
    if (req->flags && is_desktop_window(win) && win->thread != current)
2109 2110 2111 2112
    {
        set_error( STATUS_ACCESS_DENIED );
        return;
    }
2113 2114 2115
    if (req->extra_size > sizeof(req->extra_value) ||
        req->extra_offset < -1 ||
        req->extra_offset > win->nb_extra_bytes - (int)req->extra_size)
2116
    {
2117
        set_win32_error( ERROR_INVALID_INDEX );
2118 2119 2120 2121
        return;
    }
    if (req->extra_offset != -1)
    {
2122
        memcpy( &reply->old_extra_value, win->extra_bytes + req->extra_offset, req->extra_size );
2123
    }
2124
    else if (req->flags & SET_WIN_EXTRA)
2125
    {
2126
        set_win32_error( ERROR_INVALID_INDEX );
2127 2128
        return;
    }
2129 2130 2131 2132 2133
    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;
2134
    if (req->flags & SET_WIN_STYLE) win->style = req->style;
2135 2136 2137 2138 2139
    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);
2140
        if (!(win->ex_style & WS_EX_LAYERED)) win->is_layered = 0;
2141
    }
2142 2143
    if (req->flags & SET_WIN_ID) win->id = req->id;
    if (req->flags & SET_WIN_INSTANCE) win->instance = req->instance;
2144
    if (req->flags & SET_WIN_UNICODE) win->is_unicode = req->is_unicode;
2145
    if (req->flags & SET_WIN_USERDATA) win->user_data = req->user_data;
2146 2147
    if (req->flags & SET_WIN_EXTRA) memcpy( win->extra_bytes + req->extra_offset,
                                            &req->extra_value, req->extra_size );
2148 2149 2150

    /* changing window style triggers a non-client paint */
    if (req->flags & SET_WIN_STYLE) win->paint_flags |= PAINT_NONCLIENT;
2151 2152 2153
}


2154 2155 2156 2157 2158
/* 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;
2159
    user_handle_t *data;
2160
    data_size_t len;
2161 2162 2163

    if (win) for (ptr = win->parent; ptr; ptr = ptr->parent) total++;

2164 2165 2166
    reply->count = total;
    len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
    if (len && ((data = set_reply_data_size( len ))))
2167 2168 2169 2170 2171 2172 2173 2174 2175 2176
    {
        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)
{
2177 2178
    struct window *parent = NULL;
    unsigned int total;
2179
    user_handle_t *data;
2180
    data_size_t len;
2181
    struct unicode_str cls_name = get_req_unicode_str();
2182
    atom_t atom = req->atom;
2183
    struct desktop *desktop = NULL;
2184

2185 2186
    if (cls_name.len && !(atom = find_global_atom( NULL, &cls_name ))) return;

2187 2188
    if (req->desktop)
    {
2189
        if (!(desktop = get_desktop_obj( current->process, req->desktop, DESKTOP_ENUMERATE ))) return;
2190 2191
        parent = desktop->top_window;
    }
2192 2193 2194 2195 2196
    else
    {
        if (req->parent && !(parent = get_window( req->parent ))) return;
        if (!parent && !(desktop = get_thread_desktop( current, 0 ))) return;
    }
2197

2198 2199 2200 2201 2202 2203
    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 );

2204 2205 2206
    reply->count = total;
    len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
    if (len && ((data = set_reply_data_size( len ))))
2207
    {
2208 2209
        if (parent) get_children_windows( parent, atom, req->tid, data, len / sizeof(user_handle_t) );
        else
2210
        {
2211 2212 2213 2214 2215 2216 2217
            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) );
2218
        }
2219
    }
2220
    if (desktop) release_object( desktop );
2221 2222 2223
}


2224 2225 2226 2227 2228
/* 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 );
2229
    data_size_t len;
2230 2231 2232 2233 2234 2235

    if (!parent) return;

    array.handles = NULL;
    array.count = 0;
    array.total = 0;
2236
    if (!all_windows_from_point( parent, req->x, req->y, req->dpi, &array )) return;
2237 2238 2239 2240 2241 2242 2243 2244

    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 );
}


2245 2246 2247
/* get window tree information from a window handle */
DECL_HANDLER(get_window_tree)
{
2248
    struct window *ptr, *win = get_window( req->handle );
2249 2250 2251

    if (!win) return;

2252 2253 2254 2255 2256 2257 2258 2259 2260
    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;

2261 2262 2263
    if (win->parent)
    {
        struct window *parent = win->parent;
2264 2265
        reply->parent = parent->handle;
        reply->owner  = win->owner;
2266 2267 2268 2269 2270
        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;
        }
2271 2272 2273 2274 2275
        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;
2276
}
2277 2278


2279 2280
/* set the position and Z order of a window */
DECL_HANDLER(set_window_pos)
2281
{
2282 2283
    rectangle_t window_rect, client_rect, visible_rect, surface_rect, valid_rect;
    const rectangle_t *extra_rects = get_req_data();
2284
    struct window *previous = NULL;
2285
    struct window *top, *win = get_window( req->handle );
2286
    unsigned int flags = req->swp_flags;
2287

2288 2289 2290 2291 2292
    if (!win) return;
    if (!win->parent) flags |= SWP_NOZORDER;  /* no Z order for the desktop */

    if (!(flags & SWP_NOZORDER))
    {
2293
        switch ((int)req->previous)
2294
        {
2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307
        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:
2308 2309 2310 2311 2312 2313 2314
            if (!(previous = get_window( req->previous ))) return;
            /* previous must be a sibling */
            if (previous->parent != win->parent)
            {
                set_error( STATUS_INVALID_PARAMETER );
                return;
            }
2315
            break;
2316 2317 2318 2319
        }
        if (previous == win) flags |= SWP_NOZORDER;  /* nothing to do */
    }

2320 2321 2322
    /* windows that use UpdateLayeredWindow don't trigger repaints */
    if ((win->ex_style & WS_EX_LAYERED) && !win->is_layered) flags |= SWP_NOREDRAW;

2323 2324
    /* window rectangle must be ordered properly */
    if (req->window.right < req->window.left || req->window.bottom < req->window.top)
2325 2326 2327 2328 2329
    {
        set_error( STATUS_INVALID_PARAMETER );
        return;
    }

2330
    window_rect = req->window;
2331
    client_rect = req->client;
2332 2333 2334 2335 2336 2337
    if (get_req_data_size() >= sizeof(rectangle_t)) visible_rect = extra_rects[0];
    else visible_rect = window_rect;
    if (get_req_data_size() >= 2 * sizeof(rectangle_t)) surface_rect = extra_rects[1];
    else surface_rect = visible_rect;
    if (get_req_data_size() >= 3 * sizeof(rectangle_t)) valid_rect = extra_rects[2];
    else valid_rect = empty_rect;
2338 2339 2340 2341 2342
    if (win->parent && win->parent->ex_style & WS_EX_LAYOUTRTL)
    {
        mirror_rect( &win->parent->client_rect, &window_rect );
        mirror_rect( &win->parent->client_rect, &visible_rect );
        mirror_rect( &win->parent->client_rect, &client_rect );
2343 2344
        mirror_rect( &win->parent->client_rect, &surface_rect );
        mirror_rect( &win->parent->client_rect, &valid_rect );
2345 2346
    }

2347
    win->paint_flags = (win->paint_flags & ~PAINT_CLIENT_FLAGS) | (req->paint_flags & PAINT_CLIENT_FLAGS);
2348
    if (win->paint_flags & PAINT_HAS_PIXEL_FORMAT) update_pixel_format_flags( win );
2349

2350 2351
    set_window_pos( win, previous, flags, &window_rect, &client_rect,
                    &visible_rect, &surface_rect, &valid_rect );
2352

2353
    reply->new_style = win->style;
2354
    reply->new_ex_style = win->ex_style;
2355 2356

    top = get_top_clipping_window( win );
2357 2358
    if (is_visible( top ) && (top->paint_flags & PAINT_HAS_SURFACE))
    {
2359
        reply->surface_win = top->handle;
2360 2361
        reply->needs_update = !!(top->paint_flags & (PAINT_HAS_PIXEL_FORMAT | PAINT_PIXEL_FORMAT_CHILD));
    }
2362 2363 2364 2365 2366 2367 2368 2369
}


/* get the window and client rectangles of a window */
DECL_HANDLER(get_window_rectangles)
{
    struct window *win = get_window( req->handle );

2370 2371 2372 2373 2374 2375 2376 2377 2378 2379
    if (!win) return;

    reply->window  = win->window_rect;
    reply->client  = win->client_rect;

    switch (req->relative)
    {
    case COORDS_CLIENT:
        offset_rect( &reply->window, -win->client_rect.left, -win->client_rect.top );
        offset_rect( &reply->client, -win->client_rect.left, -win->client_rect.top );
2380
        if (win->ex_style & WS_EX_LAYOUTRTL) mirror_rect( &win->client_rect, &reply->window );
2381 2382 2383 2384
        break;
    case COORDS_WINDOW:
        offset_rect( &reply->window, -win->window_rect.left, -win->window_rect.top );
        offset_rect( &reply->client, -win->window_rect.left, -win->window_rect.top );
2385
        if (win->ex_style & WS_EX_LAYOUTRTL) mirror_rect( &win->window_rect, &reply->client );
2386 2387
        break;
    case COORDS_PARENT:
2388 2389 2390 2391 2392
        if (win->parent && win->parent->ex_style & WS_EX_LAYOUTRTL)
        {
            mirror_rect( &win->parent->client_rect, &reply->window );
            mirror_rect( &win->parent->client_rect, &reply->client );
        }
2393 2394 2395 2396 2397 2398 2399 2400
        break;
    case COORDS_SCREEN:
        client_to_screen_rect( win->parent, &reply->window );
        client_to_screen_rect( win->parent, &reply->client );
        break;
    default:
        set_error( STATUS_INVALID_PARAMETER );
        break;
2401
    }
2402 2403
    map_dpi_rect( win, &reply->window, win->dpi, req->dpi );
    map_dpi_rect( win, &reply->client, win->dpi, req->dpi );
2404 2405 2406
}


2407 2408 2409 2410 2411
/* get the window text */
DECL_HANDLER(get_window_text)
{
    struct window *win = get_window( req->handle );

2412
    if (win && win->text_len)
2413
    {
2414 2415
        reply->length = win->text_len / sizeof(WCHAR);
        set_reply_data( win->text, min( win->text_len, get_reply_max_size() ));
2416 2417 2418 2419 2420 2421 2422
    }
}


/* set the window text */
DECL_HANDLER(set_window_text)
{
2423 2424
    data_size_t len;
    WCHAR *text = NULL;
2425 2426
    struct window *win = get_window( req->handle );

2427 2428 2429 2430 2431 2432
    if (!win) return;
    len = (get_req_data_size() / sizeof(WCHAR)) * sizeof(WCHAR);
    if (len && !(text = memdup( get_req_data(), len ))) return;
    free( win->text );
    win->text = text;
    win->text_len = len;
2433 2434 2435
}


2436 2437 2438 2439
/* get the coordinates offset between two windows */
DECL_HANDLER(get_windows_offset)
{
    struct window *win;
2440
    int x, y, mirror_from = 0, mirror_to = 0;
2441

2442
    reply->x = reply->y = 0;
2443 2444 2445
    if (req->from)
    {
        if (!(win = get_window( req->from ))) return;
2446 2447 2448 2449 2450 2451 2452
        if (win->ex_style & WS_EX_LAYOUTRTL) mirror_from = 1;
        x = mirror_from ? win->client_rect.right - win->client_rect.left : 0;
        y = 0;
        client_to_screen( win, &x, &y );
        map_dpi_point( win, &x, &y, win->dpi, req->dpi );
        reply->x += x;
        reply->y += y;
2453 2454 2455 2456
    }
    if (req->to)
    {
        if (!(win = get_window( req->to ))) return;
2457 2458 2459 2460 2461 2462 2463
        if (win->ex_style & WS_EX_LAYOUTRTL) mirror_to = 1;
        x = mirror_to ? win->client_rect.right - win->client_rect.left : 0;
        y = 0;
        client_to_screen( win, &x, &y );
        map_dpi_point( win, &x, &y, win->dpi, req->dpi );
        reply->x -= x;
        reply->y -= y;
2464
    }
2465 2466
    if (mirror_from) reply->x = -reply->x;
    reply->mirror = mirror_from ^ mirror_to;
2467 2468 2469
}


2470 2471 2472 2473
/* get the visible region of a window */
DECL_HANDLER(get_visible_region)
{
    struct region *region;
2474
    struct window *top, *win = get_window( req->window );
2475 2476 2477

    if (!win) return;

2478
    top = get_top_clipping_window( win );
2479
    if ((region = get_visible_region( win, req->flags )))
2480
    {
2481 2482 2483
        rectangle_t *data;
        map_win_region_to_screen( win, region );
        data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size );
2484
        if (data) set_reply_data_ptr( data, reply->total_size );
2485
    }
2486
    reply->top_win  = top->handle;
2487
    reply->top_rect = top->surface_rect;
2488

2489 2490 2491 2492 2493 2494 2495
    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
2496
    {
2497 2498 2499 2500
        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;
2501
    }
2502
    reply->paint_flags = win->paint_flags & PAINT_CLIENT_FLAGS;
2503 2504 2505
}


2506 2507 2508 2509 2510 2511 2512 2513 2514 2515
/* get the surface visible region of a window */
DECL_HANDLER(get_surface_region)
{
    struct region *region;
    struct window *win = get_window( req->window );

    if (!win || !is_visible( win )) return;

    if ((region = get_surface_region( win )))
    {
2516
        rectangle_t *data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size );
2517 2518 2519 2520 2521 2522
        if (data) set_reply_data_ptr( data, reply->total_size );
    }
    reply->visible_rect = win->visible_rect;
}


2523 2524 2525
/* get the window region */
DECL_HANDLER(get_window_region)
{
2526
    rectangle_t *data;
2527 2528 2529
    struct window *win = get_window( req->window );

    if (!win) return;
2530
    if (!win->win_region) return;
2531

2532
    if (win->ex_style & WS_EX_LAYOUTRTL)
2533
    {
2534 2535 2536 2537 2538 2539 2540 2541 2542 2543
        struct region *region = create_empty_region();

        if (!region) return;
        if (!copy_region( region, win->win_region ))
        {
            free_region( region );
            return;
        }
        mirror_region( &win->window_rect, region );
        data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size );
2544
    }
2545 2546 2547
    else data = get_region_data( win->win_region, get_reply_max_size(), &reply->total_size );

    if (data) set_reply_data_ptr( data, reply->total_size );
2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562
}


/* 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;
2563
        if (win->ex_style & WS_EX_LAYOUTRTL) mirror_region( &win->window_rect, region );
2564
    }
2565
    set_window_region( win, region, req->redraw );
2566 2567 2568
}


2569 2570 2571 2572 2573
/* get a window update region */
DECL_HANDLER(get_update_region)
{
    rectangle_t *data;
    unsigned int flags = req->flags;
2574
    struct window *from_child = NULL;
2575 2576 2577
    struct window *win = get_window( req->window );

    reply->flags = 0;
2578
    if (!win) return;
2579

2580
    if (req->from_child)
2581 2582 2583
    {
        struct window *ptr;

2584
        if (!(from_child = get_window( req->from_child ))) return;
2585

2586 2587 2588 2589
        /* make sure from_child is a child of win */
        ptr = from_child;
        while (ptr && ptr != win) ptr = ptr->parent;
        if (!ptr)
2590
        {
2591 2592
            set_error( STATUS_INVALID_PARAMETER );
            return;
2593 2594 2595
        }
    }

2596 2597 2598 2599 2600 2601
    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;
    }

2602
    reply->flags = get_window_update_flags( win, from_child, flags, &win );
2603 2604 2605 2606 2607 2608
    reply->child = win->handle;

    if (flags & UPDATE_NOREGION) return;

    if (win->update_region)
    {
2609 2610 2611 2612 2613 2614 2615 2616 2617
        /* 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;
        }
2618 2619 2620
        if ((flags & UPDATE_CLIPCHILDREN) && (win->style & WS_CLIPCHILDREN))
            clip_children( win, NULL, region, win->client_rect.left - win->window_rect.left,
                           win->client_rect.top - win->window_rect.top );
2621 2622 2623
        map_win_region_to_screen( win, region );
        if (!(data = get_region_data_and_free( region, get_reply_max_size(),
                                               &reply->total_size ))) return;
2624 2625 2626 2627 2628
        set_reply_data_ptr( data, reply->total_size );
    }

    if (reply->flags & (UPDATE_PAINT|UPDATE_INTERNALPAINT)) /* validate everything */
    {
2629
        validate_parents( win );
2630 2631 2632 2633 2634
        validate_whole_window( win );
    }
    else
    {
        if (reply->flags & UPDATE_NONCLIENT) validate_non_client( win );
2635 2636
        if (reply->flags & UPDATE_ERASE)
        {
2637
            win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE);
2638
            /* desktop window only gets erased, not repainted */
2639
            if (is_desktop_window(win)) validate_whole_window( win );
2640
        }
2641 2642 2643 2644
    }
}


2645 2646 2647
/* update the z order of a window so that a given rectangle is fully visible */
DECL_HANDLER(update_window_zorder)
{
2648
    rectangle_t tmp, rect = req->rect;
2649 2650 2651 2652 2653 2654 2655 2656 2657
    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;
2658
        if (ptr->is_layered && (ptr->layered_flags & LWA_COLORKEY)) continue;
2659 2660 2661
        tmp = rect;
        map_dpi_rect( win, &tmp, win->parent->dpi, win->dpi );
        if (!intersect_rect( &tmp, &tmp, &ptr->visible_rect )) continue;
2662 2663 2664 2665 2666
        if (ptr->win_region)
        {
            offset_rect( &tmp, -ptr->window_rect.left, -ptr->window_rect.top );
            if (!rect_in_region( ptr->win_region, &tmp )) continue;
        }
2667
        /* found a window obscuring the rectangle, now move win above this one */
2668 2669 2670 2671 2672 2673
        /* 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 );
        }
2674 2675 2676 2677 2678
        break;
    }
}


2679 2680 2681
/* mark parts of a window as needing a redraw */
DECL_HANDLER(redraw_window)
{
2682
    unsigned int flags = req->flags;
2683
    struct region *region = NULL;
2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694
    struct window *win;

    if (!req->window)
    {
        if (!(win = get_desktop_window( current ))) return;
    }
    else
    {
        if (!(win = get_window( req->window ))) return;
        if (is_desktop_window( win )) flags &= ~RDW_ALLCHILDREN;
    }
2695 2696 2697

    if (!is_visible( win )) return;  /* nothing to do */

2698
    if (flags & (RDW_VALIDATE|RDW_INVALIDATE))
2699 2700 2701 2702 2703
    {
        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;
2704
            if (win->ex_style & WS_EX_LAYOUTRTL) mirror_region( &win->client_rect, region );
2705 2706 2707
        }
    }

2708
    redraw_window( win, region, (flags & RDW_INVALIDATE) && (flags & RDW_FRAME), flags );
2709 2710 2711 2712
    if (region) free_region( region );
}


2713 2714 2715
/* set a window property */
DECL_HANDLER(set_window_property)
{
2716
    struct unicode_str name = get_req_unicode_str();
2717 2718
    struct window *win = get_window( req->window );

2719 2720
    if (!win) return;

2721
    if (name.len)
2722
    {
2723
        atom_t atom = add_global_atom( NULL, &name );
2724 2725
        if (atom)
        {
2726
            set_property( win, atom, req->data, PROP_TYPE_STRING );
2727
            release_global_atom( NULL, atom );
2728 2729
        }
    }
2730
    else set_property( win, req->atom, req->data, PROP_TYPE_ATOM );
2731 2732 2733 2734 2735 2736
}


/* remove a window property */
DECL_HANDLER(remove_window_property)
{
2737
    struct unicode_str name = get_req_unicode_str();
2738
    struct window *win = get_window( req->window );
2739

2740
    if (win)
2741
    {
2742
        atom_t atom = name.len ? find_global_atom( NULL, &name ) : req->atom;
2743
        if (atom) reply->data = remove_property( win, atom );
2744
    }
2745 2746 2747 2748 2749 2750
}


/* get a window property */
DECL_HANDLER(get_window_property)
{
2751
    struct unicode_str name = get_req_unicode_str();
2752
    struct window *win = get_window( req->window );
2753

2754
    if (win)
2755
    {
2756
        atom_t atom = name.len ? find_global_atom( NULL, &name ) : req->atom;
2757
        if (atom) reply->data = get_property( win, atom );
2758
    }
2759 2760 2761 2762 2763 2764
}


/* get the list of properties of a window */
DECL_HANDLER(get_window_properties)
{
2765 2766
    property_data_t *data;
    int i, count, max = get_reply_max_size() / sizeof(*data);
2767 2768
    struct window *win = get_window( req->window );

2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783
    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);
2784
        data->data   = win->properties[i].data;
2785 2786 2787
        data++;
        count--;
    }
2788
}
2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799


/* 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;
    }
2800 2801 2802 2803 2804
    else if (*win)
    {
        set_error( STATUS_ACCESS_DENIED );
        return 0;
    }
2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839
    *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;
}
2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866

/* 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)
    {
2867 2868
        int was_layered = win->is_layered;

2869 2870 2871 2872 2873 2874
        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;
2875
        /* repaint since we know now it's not going to use UpdateLayeredWindow */
2876
        if (!was_layered) redraw_window( win, 0, 1, RDW_ALLCHILDREN | RDW_INVALIDATE | RDW_ERASE | RDW_FRAME );
2877 2878 2879
    }
    else set_win32_error( ERROR_INVALID_WINDOW_HANDLE );
}