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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    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->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 );
}

652 653 654 655 656 657 658 659 660
/* 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 );
}

661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683
/* 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;
}

684 685 686
/* check if window and all its ancestors are visible */
static int is_visible( const struct window *win )
{
687
    while (win)
688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704
    {
        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 );
}

705 706 707 708 709 710 711
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);
}

712 713
/* 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 )
714 715 716 717 718 719
{
    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 */
720 721
    map_dpi_point( win, x, y, dpi, win->dpi );
    if (!point_in_rect( &win->visible_rect, *x, *y ))
722 723
        return 0;  /* not in window */
    if (win->win_region &&
724
        !point_in_region( win->win_region, *x - win->window_rect.left, *y - win->window_rect.top ))
725 726 727 728
        return 0;  /* not in window region */
    return 1;
}

729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751
/* 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;
}

752 753 754
/* 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 )
{
755
    struct window *ptr;
756

757
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
758
    {
759 760 761
        int x_child = x, y_child = y;

        if (!is_point_in_window( ptr, &x_child, &y_child, parent->dpi )) continue;  /* skip it */
762 763 764 765 766

        /* 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 */
767
        if (!point_in_rect( &ptr->client_rect, x_child, y_child )) return ptr;
768

769 770
        return child_window_from_point( ptr, x_child - ptr->client_rect.left,
                                        y_child - ptr->client_rect.top );
771 772 773 774
    }
    return parent;  /* not found any child */
}

775 776 777 778 779 780
/* 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;

781
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
782
    {
783 784 785
        int x_child = x, y_child = y;

        if (!is_point_in_window( ptr, &x_child, &y_child, parent->dpi )) continue;  /* skip it */
786 787

        /* if point is in client area, and window is not minimized or disabled, check children */
788
        if (!(ptr->style & (WS_MINIMIZE|WS_DISABLED)) && point_in_rect( &ptr->client_rect, x_child, y_child ))
789
        {
790 791
            if (!get_window_children_from_point( ptr, x_child - ptr->client_rect.left,
                                                 y_child - ptr->client_rect.top, array ))
792 793 794 795 796 797 798 799 800
                return 0;
        }

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

801 802
/* get handle of root of top-most window containing point */
user_handle_t shallow_window_from_point( struct desktop *desktop, int x, int y )
803
{
804
    struct window *ptr;
805

806
    if (!desktop->top_window) return 0;
807 808 809

    LIST_FOR_EACH_ENTRY( ptr, &desktop->top_window->children, struct window, entry )
    {
810 811 812
        int x_child = x, y_child = y;

        if (!is_point_in_window( ptr, &x_child, &y_child, 0 )) continue;  /* skip it */
813 814 815 816 817 818 819 820 821 822 823 824
        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;

825 826 827 828
    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 );
829
}
830

831
/* return list of all windows containing point (in absolute coords) */
832 833
static int all_windows_from_point( struct window *top, int x, int y, unsigned int dpi,
                                   struct user_handle_array *array )
834
{
835
    if (!is_desktop_window( top ) && !is_desktop_window( top->parent ))
836
    {
837 838
        screen_to_client( top->parent, &x, &y, dpi );
        dpi = top->parent->dpi;
839 840
    }

841
    if (!is_point_in_window( top, &x, &y, dpi )) return 1;
842
    /* if point is in client area, and window is not minimized or disabled, check children */
843
    if (!(top->style & (WS_MINIMIZE|WS_DISABLED)) && point_in_rect( &top->client_rect, x, y ))
844
    {
845 846 847 848 849 850
        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;
851 852 853 854 855 856 857
    }
    /* now add window to the array */
    if (!add_handle_to_array( array, top->handle )) return 0;
    return 1;
}


858 859 860 861 862 863 864
/* 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 );
}
865

866 867 868 869 870 871 872 873

/* 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);
}


874 875 876 877 878
/* 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;

879
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
880 881
    {
        if (!(ptr->style & WS_VISIBLE)) continue;
882
        if (ptr->thread == thread && win_needs_repaint( ptr ))
883
            ret = ptr;
884
        else if (!(ptr->style & WS_MINIMIZE)) /* explore its children */
885
            ret = find_child_to_repaint( ptr, thread );
886
        if (ret) break;
887 888 889 890 891
    }

    if (ret && (ret->ex_style & WS_EX_TRANSPARENT))
    {
        /* transparent window, check for non-transparent sibling to paint first */
892
        for (ptr = get_next_window(ret); ptr; ptr = get_next_window(ptr))
893 894 895
        {
            if (!(ptr->style & WS_VISIBLE)) continue;
            if (ptr->ex_style & WS_EX_TRANSPARENT) continue;
896 897
            if (ptr->thread != thread) continue;
            if (win_needs_repaint( ptr )) return ptr;
898 899 900 901 902 903
        }
    }
    return ret;
}


904
/* find a window that needs to receive a WM_PAINT; also clear its internal paint flag */
905 906
user_handle_t find_window_to_repaint( user_handle_t parent, struct thread *thread )
{
907
    struct window *ptr, *win, *top_window = get_desktop_window( thread );
908 909

    if (!top_window) return 0;
910

911 912 913
    if (top_window->thread == thread && win_needs_repaint( top_window )) win = top_window;
    else win = find_child_to_repaint( top_window, thread );

914
    if (win && parent)
915 916 917
    {
        /* check that it is a child of the specified parent */
        for (ptr = win; ptr; ptr = ptr->parent)
918
            if (ptr->handle == parent) break;
919
        /* otherwise don't return any window, we don't repaint a child before its parent */
920
        if (!ptr) win = NULL;
921
    }
922 923 924
    if (!win) return 0;
    win->paint_flags &= ~PAINT_INTERNAL;
    return win->handle;
925 926 927
}


928 929 930 931 932 933 934 935 936 937 938 939
/* 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;
}


940 941 942 943
/* 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)
944
        offset_rect( rect, win->client_rect.left, win->client_rect.top );
945 946
}

947 948 949
/* map the region from window to screen coordinates */
static inline void map_win_region_to_screen( struct window *win, struct region *region )
{
950 951 952 953 954 955 956
    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 );
    }
957 958 959
}


960 961 962 963 964 965 966 967
/* 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;
968
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
969
    {
970
        if (ptr == last) break;
971 972
        if (!(ptr->style & WS_VISIBLE)) continue;
        if (ptr->ex_style & WS_EX_TRANSPARENT) continue;
973
        set_region_rect( tmp, &ptr->visible_rect );
974 975 976 977 978
        if (ptr->win_region && !intersect_window_region( tmp, ptr ))
        {
            free_region( tmp );
            return NULL;
        }
979 980 981 982 983 984 985 986 987
        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;
}


988 989 990 991 992
/* 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;

993
    intersect_rect( &rect, &win->window_rect, &win->client_rect );
994 995 996 997 998 999 1000 1001 1002 1003 1004
    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 );
1005 1006 1007 1008
    set_region_rect( region, &rect );
}


1009 1010 1011
/* get the top-level window to clip against for a given window */
static inline struct window *get_top_clipping_window( struct window *win )
{
1012 1013
    while (!(win->paint_flags & PAINT_HAS_SURFACE) && win->parent && !is_desktop_window(win->parent))
        win = win->parent;
1014 1015 1016 1017
    return win;
}


1018
/* compute the visible region of a window, in window coordinates */
1019
static struct region *get_visible_region( struct window *win, unsigned int flags )
1020
{
1021
    struct region *tmp = NULL, *region;
1022 1023 1024 1025 1026 1027
    int offset_x, offset_y;

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

    /* first check if all ancestors are visible */

1028
    if (!is_visible( win )) return region;  /* empty region */
1029

1030 1031 1032 1033 1034 1035
    if (is_desktop_window( win ))
    {
        set_region_rect( region, &win->window_rect );
        return region;
    }

1036
    /* create a region relative to the window itself */
1037

1038
    if ((flags & DCX_PARENTCLIP) && !is_desktop_window( win->parent ))
1039
    {
1040 1041
        set_region_client_rect( region, win->parent );
        offset_region( region, -win->parent->client_rect.left, -win->parent->client_rect.top );
1042 1043 1044
    }
    else if (flags & DCX_WINDOW)
    {
1045
        set_region_visible_rect( region, win );
1046
        if (win->win_region && !intersect_window_region( region, win )) goto error;
1047 1048 1049
    }
    else
    {
1050
        set_region_client_rect( region, win );
1051
        if (win->win_region && !intersect_window_region( region, win )) goto error;
1052 1053 1054 1055 1056 1057
    }

    /* clip children */

    if (flags & DCX_CLIPCHILDREN)
    {
1058
        if (!clip_children( win, NULL, region, win->client_rect.left, win->client_rect.top )) goto error;
1059 1060 1061 1062
    }

    /* clip siblings of ancestors */

1063 1064
    offset_x = win->window_rect.left;
    offset_y = win->window_rect.top;
1065

1066
    if ((tmp = create_empty_region()) != NULL)
1067
    {
1068
        while (!is_desktop_window( win->parent ))
1069
        {
1070
            /* we don't clip out top-level siblings as that's up to the native windowing system */
1071
            if (win->style & WS_CLIPSIBLINGS)
1072 1073 1074 1075 1076 1077
            {
                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;
1078 1079 1080
            offset_x += win->client_rect.left;
            offset_y += win->client_rect.top;
            offset_region( region, win->client_rect.left, win->client_rect.top );
1081
            set_region_client_rect( tmp, win );
1082 1083
            if (win->win_region && !intersect_window_region( tmp, win )) goto error;
            if (!intersect_region( region, region, tmp )) goto error;
1084 1085 1086 1087
            if (is_region_empty( region )) break;
        }
        free_region( tmp );
    }
1088
    offset_region( region, -offset_x, -offset_y );  /* make it relative to target window */
1089 1090 1091
    return region;

error:
1092
    if (tmp) free_region( tmp );
1093 1094 1095 1096 1097
    free_region( region );
    return NULL;
}


1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117
/* 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;
1118
        if (!(ptr->paint_flags & (PAINT_HAS_PIXEL_FORMAT | PAINT_PIXEL_FORMAT_CHILD))) continue;
1119 1120 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

        /* 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;

1152 1153 1154
    if ((win->paint_flags & PAINT_HAS_PIXEL_FORMAT) && !subtract_region( region, region, clip ))
        goto error;

1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175
    /* 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;
}


1176 1177 1178 1179 1180
/* 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;
1181
    if (!win->class) set_error( STATUS_ACCESS_DENIED );
1182 1183 1184
    return win->class;
}

1185 1186 1187 1188
/* 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 )
{
1189
    int offset_x = win->window_rect.left, offset_y = win->window_rect.top;
1190 1191 1192

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

1193 1194 1195 1196
    if (!(win->style & WS_VISIBLE)) return 0;
    if (is_desktop_window( win )) return 1;

    while (!is_desktop_window( win->parent ))
1197 1198 1199
    {
        win = win->parent;
        if (!(win->style & WS_VISIBLE) || win->style & WS_MINIMIZE) return 0;
1200 1201 1202
        offset_x += win->client_rect.left;
        offset_y += win->client_rect.top;
        offset_rect( rect, win->client_rect.left, win->client_rect.top );
1203 1204 1205 1206 1207 1208 1209
        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;
}

1210 1211 1212 1213
/* 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 )
{
1214 1215
    rectangle_t rect;
    struct region *tmp;
1216

1217 1218 1219
    if (!get_window_visible_rect( win, &rect, frame )) return NULL;
    if (!(tmp = create_empty_region())) return NULL;
    set_region_rect( tmp, &rect );
1220

1221 1222 1223 1224 1225
    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 );
1226

1227 1228 1229
        /* intersect specified region with bounding rect */
        if (!intersect_region( tmp, region, tmp )) goto done;
        if (is_region_empty( tmp )) goto done;
1230

1231 1232 1233 1234
        /* 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 );
    }
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253
    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;
1283
    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;

1332
    if ((tmp = create_empty_region()))
1333
    {
1334
        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);
    }
}


1371
/* validate the update region of a window on all parents; helper for get_update_region */
1372 1373 1374 1375 1376 1377 1378 1379
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;

1380
    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 )
{
1412
    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 );
1442
            if (flags & RDW_NOERASE) win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE);
1443 1444 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
        }
    }

    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;

1471
    LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry )
1472 1473
    {
        if (!(child->style & WS_VISIBLE)) continue;
1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484
        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 );
1485
    }
1486

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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)
    {
1506 1507 1508 1509 1510
        if (win->update_region)
        {
            if (win->paint_flags & PAINT_DELAYED_ERASE) ret |= UPDATE_DELAYED_ERASE;
            ret |= UPDATE_PAINT;
        }
1511 1512 1513
    }
    if (flags & UPDATE_INTERNALPAINT)
    {
1514 1515 1516 1517 1518
        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 */
1525 1526
static unsigned int get_child_update_flags( struct window *win, struct window *from_child,
                                            unsigned int flags, struct window **child )
1527 1528 1529 1530
{
    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;

1541
    LIST_FOR_EACH_ENTRY( ptr, &win->children, struct window, entry )
1542
    {
1543 1544 1545 1546 1547
        if (from_child)  /* skip all children until from_child is found */
        {
            if (ptr == from_child) from_child = NULL;
            continue;
        }
1548 1549 1550 1551 1552 1553
        if (!(ptr->style & WS_VISIBLE)) continue;
        if ((ret = get_update_flags( ptr, flags )) != 0)
        {
            *child = ptr;
            break;
        }
1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568
        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;
1569
    for (ptr = from_child; ptr; ptr = ptr->parent)
1570 1571 1572 1573 1574 1575 1576 1577 1578 1579
    {
        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)))
    {
1580
        for (ptr = win->parent; ptr; ptr = ptr->parent)
1581
        {
1582 1583 1584 1585 1586
            if (!(ptr->style & WS_CLIPCHILDREN) && win_needs_repaint( ptr ))
                return 0;
        }
        if (from_child && !(flags & UPDATE_ALLCHILDREN))
        {
1587
            for (ptr = from_sibling ? from_sibling : from_child; ptr; ptr = ptr->parent)
1588 1589 1590 1591
            {
                if (!(ptr->style & WS_CLIPCHILDREN) && win_needs_repaint( ptr )) from_sibling = ptr;
                if (ptr == win) break;
            }
1592
        }
1593
    }
1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625


    /* 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;
1626 1627 1628
}


1629 1630 1631 1632
/* 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 )
1633
{
1634
    struct region *new_vis_rgn, *exposed_rgn;
1635

1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652
    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;
        }
    }

1653
    if (win->parent && !is_desktop_window( win->parent ))
1654
    {
1655 1656 1657 1658 1659 1660 1661 1662 1663 1664
        /* 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 ))
            {
1665 1666
                /* make it relative to parent */
                offset_region( new_vis_rgn, old_window_rect->left, old_window_rect->top );
1667 1668 1669
                redraw_window( win->parent, new_vis_rgn, 0, RDW_INVALIDATE | RDW_ERASE | RDW_ALLCHILDREN );
            }
        }
1670
    }
1671 1672
    free_region( new_vis_rgn );
    return exposed_rgn;
1673 1674 1675 1676
}


/* set the window and client rectangles, updating the update region if necessary */
1677
static void set_window_pos( struct window *win, struct window *previous,
1678
                            unsigned int swp_flags, const rectangle_t *window_rect,
1679
                            const rectangle_t *client_rect, const rectangle_t *visible_rect,
1680
                            const rectangle_t *surface_rect, const rectangle_t *valid_rect )
1681
{
1682
    struct region *old_vis_rgn = NULL, *exposed_rgn = NULL;
1683
    const rectangle_t old_window_rect = win->window_rect;
1684
    const rectangle_t old_visible_rect = win->visible_rect;
1685
    const rectangle_t old_client_rect = win->client_rect;
1686
    rectangle_t rect;
1687
    int client_changed, frame_changed;
1688
    int visible = (win->style & WS_VISIBLE) || (swp_flags & SWP_SHOWWINDOW);
1689

1690
    if (win->parent && !is_visible( win->parent )) visible = 0;
1691

1692
    if (visible && !(old_vis_rgn = get_visible_region( win, DCX_WINDOW ))) return;
1693 1694 1695

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

1696
    win->window_rect  = *window_rect;
1697
    win->visible_rect = *visible_rect;
1698
    win->surface_rect = *surface_rect;
1699
    win->client_rect  = *client_rect;
1700
    if (!(swp_flags & SWP_NOZORDER) && win->parent) link_window( win, previous );
1701 1702 1703
    if (swp_flags & SWP_SHOWWINDOW) win->style |= WS_VISIBLE;
    else if (swp_flags & SWP_HIDEWINDOW) win->style &= ~WS_VISIBLE;

1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714
    /* 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 );
1715
            offset_rect( &child->surface_rect, new_size - old_size, 0 );
1716 1717 1718 1719
            offset_rect( &child->client_rect, new_size - old_size, 0 );
        }
    }

1720
    /* reset cursor clip rectangle when the desktop changes size */
1721
    if (win == win->desktop->top_window) win->desktop->cursor.clip = *window_rect;
1722

1723 1724 1725
    /* if the window is not visible, everything is easy */
    if (!visible) return;

1726 1727
    /* expose anything revealed by the change */

1728
    if (!(swp_flags & SWP_NOREDRAW))
1729
        exposed_rgn = expose_window( win, &old_window_rect, old_vis_rgn );
1730 1731 1732 1733 1734

    if (!(win->style & WS_VISIBLE))
    {
        /* clear the update region since the window is no longer visible */
        validate_whole_window( win );
1735
        validate_children( win );
1736 1737 1738
        goto done;
    }

1739 1740
    /* crop update region to the new window rect */

1741
    if (win->update_region)
1742
    {
1743
        if (get_window_visible_rect( win, &rect, 1 ))
1744
        {
1745 1746 1747 1748 1749 1750 1751 1752 1753
            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 );
            }
1754
        }
1755
        else set_update_region( win, NULL ); /* visible rect is empty */
1756 1757
    }

1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768
    /* 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 );

1769 1770
    if (swp_flags & SWP_NOREDRAW) goto done;  /* do not repaint anything */

1771 1772
    /* expose the whole non-client area if it changed in any way */

1773 1774 1775
    if (swp_flags & SWP_NOCOPYBITS)
    {
        frame_changed = ((swp_flags & SWP_FRAMECHANGED) ||
1776 1777
                         memcmp( window_rect, &old_window_rect, sizeof(old_window_rect) ) ||
                         memcmp( visible_rect, &old_visible_rect, sizeof(old_visible_rect) ));
1778 1779 1780 1781 1782 1783 1784 1785 1786
        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 ||
1787 1788 1789 1790 1791
                         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);
1792 1793 1794
        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 ||
1795
                          client_rect->bottom - old_client_rect.bottom != y_offset ||
1796
                          memcmp( valid_rect, client_rect, sizeof(*client_rect) ));
1797 1798 1799
    }

    if (frame_changed || client_changed)
1800
    {
1801
        struct region *win_rgn = old_vis_rgn;  /* reuse previous region */
1802

1803
        set_region_rect( win_rgn, window_rect );
1804
        if (!is_rect_empty( valid_rect ))
1805
        {
1806
            /* subtract the valid portion of client rect from the total region */
1807 1808
            struct region *tmp = create_empty_region();
            if (tmp)
1809
            {
1810
                set_region_rect( tmp, valid_rect );
1811 1812 1813 1814 1815 1816 1817
                /* 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 );
                }
1818 1819
                if (subtract_region( tmp, win_rgn, tmp )) win_rgn = tmp;
                else free_region( tmp );
1820 1821
            }
        }
1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833
        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;
        }
1834 1835
    }

1836 1837 1838
    if (exposed_rgn)
        redraw_window( win, exposed_rgn, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN );

1839
done:
1840
    if (old_vis_rgn) free_region( old_vis_rgn );
1841
    if (exposed_rgn) free_region( exposed_rgn );
1842 1843 1844
    clear_error();  /* we ignore out of memory errors once the new rects have been set */
}

1845

1846 1847 1848
/* set the window region, updating the update region if necessary */
static void set_window_region( struct window *win, struct region *region, int redraw )
{
1849
    struct region *old_vis_rgn = NULL, *exposed_rgn;
1850 1851 1852 1853

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

1854
    if (redraw) old_vis_rgn = get_visible_region( win, DCX_WINDOW );
1855 1856 1857 1858

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

1859 1860
    /* expose anything revealed by the change */
    if (old_vis_rgn && ((exposed_rgn = expose_window( win, &win->window_rect, old_vis_rgn ))))
1861
    {
1862 1863
        redraw_window( win, exposed_rgn, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN );
        free_region( exposed_rgn );
1864 1865 1866 1867 1868 1869 1870
    }

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


1871 1872 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
/* 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;
1900
    free_hotkeys( win->desktop, win->handle );
1901
    cleanup_clipboard_window( win->desktop, win->handle );
1902 1903 1904 1905 1906 1907 1908 1909 1910 1911
    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;
    }
1912 1913 1914 1915 1916
    else if (is_desktop_window( win->parent ))
    {
        post_message( win->parent->handle, WM_PARENTNOTIFY, WM_DESTROY, win->handle );
    }

1917 1918 1919 1920 1921 1922 1923 1924 1925 1926
    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 );
}


1927 1928
/* create a window */
DECL_HANDLER(create_window)
1929
{
1930
    struct window *win, *parent = NULL, *owner = NULL;
1931
    struct unicode_str cls_name = get_req_unicode_str();
1932
    atom_t atom;
1933

1934
    reply->handle = 0;
1935
    if (req->parent && !(parent = get_window( req->parent ))) return;
1936

1937 1938 1939 1940
    if (req->owner)
    {
        if (!(owner = get_window( req->owner ))) return;
        if (is_desktop_window(owner)) owner = NULL;
1941
        else if (parent && !is_desktop_window(parent))
1942
        {
1943
            /* an owned window must be created as top-level */
1944 1945 1946
            set_error( STATUS_ACCESS_DENIED );
            return;
        }
1947
        else /* owner must be a top-level window */
1948 1949
            while ((owner->style & (WS_POPUP|WS_CHILD)) == WS_CHILD && !is_desktop_window(owner->parent))
                owner = owner->parent;
1950
    }
1951

1952
    atom = cls_name.len ? find_global_atom( NULL, &cls_name ) : req->atom;
1953

1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965
    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;
    }
1966

1967
    reply->handle    = win->handle;
1968 1969
    reply->parent    = win->parent ? win->parent->handle : 0;
    reply->owner     = win->owner;
1970
    reply->extra     = win->nb_extra_bytes;
1971
    reply->dpi       = win->dpi;
1972
    reply->awareness = win->dpi_awareness;
1973
    reply->class_ptr = get_class_client_ptr( win->class );
1974 1975 1976
}


1977 1978
/* set the parent of a window */
DECL_HANDLER(set_parent)
1979
{
1980
    struct window *win, *parent = NULL;
1981

1982 1983
    if (!(win = get_window( req->handle ))) return;
    if (req->parent && !(parent = get_window( req->parent ))) return;
1984

1985
    if (is_desktop_window(win))
1986 1987 1988 1989
    {
        set_error( STATUS_INVALID_PARAMETER );
        return;
    }
1990
    reply->old_parent  = win->parent->handle;
1991
    reply->full_parent = parent ? parent->handle : 0;
1992
    set_parent_window( win, parent );
1993
    reply->dpi       = win->dpi;
1994
    reply->awareness = win->dpi_awareness;
1995 1996 1997 1998 1999 2000
}


/* destroy a window */
DECL_HANDLER(destroy_window)
{
2001
    struct window *win = get_window( req->handle );
2002 2003
    if (win)
    {
2004
        if (!is_desktop_window(win)) destroy_window( win );
2005
        else if (win->thread == current) detach_window_thread( win );
2006 2007 2008 2009 2010
        else set_error( STATUS_ACCESS_DENIED );
    }
}


2011 2012 2013
/* retrieve the desktop window for the current thread */
DECL_HANDLER(get_desktop_window)
{
2014
    struct desktop *desktop = get_thread_desktop( current, 0 );
2015
    int force;
2016

2017 2018
    if (!desktop) return;

2019 2020 2021 2022
    /* if winstation is invisible, then avoid roundtrip */
    force = req->force || !(desktop->winstation->flags & WSF_VISIBLE);

    if (!desktop->top_window && force)  /* create it */
2023
    {
2024
        if ((desktop->top_window = create_window( NULL, NULL, DESKTOP_ATOM, 0 )))
2025 2026 2027 2028 2029 2030
        {
            detach_window_thread( desktop->top_window );
            desktop->top_window->style  = WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
        }
    }

2031
    if (!desktop->msg_window && force)  /* create it */
2032 2033 2034 2035
    {
        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 );
2036
        if (atom && (desktop->msg_window = create_window( NULL, NULL, atom, 0 )))
2037 2038 2039 2040 2041 2042 2043 2044 2045
        {
            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 );
2046 2047 2048
}


2049 2050 2051 2052
/* set a window owner */
DECL_HANDLER(set_window_owner)
{
    struct window *win = get_window( req->handle );
2053
    struct window *owner = NULL, *ptr;
2054

2055 2056
    if (!win) return;
    if (req->owner && !(owner = get_window( req->owner ))) return;
2057
    if (is_desktop_window(win))
2058 2059 2060 2061
    {
        set_error( STATUS_ACCESS_DENIED );
        return;
    }
2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072

    /* 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;
        }
    }

2073 2074
    reply->prev_owner = win->owner;
    reply->full_owner = win->owner = owner ? owner->handle : 0;
2075 2076 2077
}


2078
/* get information from a window handle */
2079 2080
DECL_HANDLER(get_window_info)
{
2081
    struct window *win = get_window( req->handle );
2082

2083 2084 2085 2086 2087 2088
    if (!win) return;

    reply->full_handle = win->handle;
    reply->last_active = win->handle;
    reply->is_unicode  = win->is_unicode;
    reply->awareness   = win->dpi_awareness;
2089
    reply->dpi         = win->dpi ? win->dpi : get_monitor_dpi( win );
2090 2091
    if (get_user_object( win->last_active, USER_WINDOW )) reply->last_active = win->last_active;
    if (win->thread)
2092
    {
2093 2094 2095
        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;
2096 2097
    }
}
2098 2099


2100 2101 2102 2103
/* set some information in a window */
DECL_HANDLER(set_window_info)
{
    struct window *win = get_window( req->handle );
2104

2105
    if (!win) return;
2106
    if (req->flags && is_desktop_window(win) && win->thread != current)
2107 2108 2109 2110
    {
        set_error( STATUS_ACCESS_DENIED );
        return;
    }
2111 2112 2113
    if (req->extra_size > sizeof(req->extra_value) ||
        req->extra_offset < -1 ||
        req->extra_offset > win->nb_extra_bytes - (int)req->extra_size)
2114
    {
2115
        set_win32_error( ERROR_INVALID_INDEX );
2116 2117 2118 2119
        return;
    }
    if (req->extra_offset != -1)
    {
2120
        memcpy( &reply->old_extra_value, win->extra_bytes + req->extra_offset, req->extra_size );
2121
    }
2122
    else if (req->flags & SET_WIN_EXTRA)
2123
    {
2124
        set_win32_error( ERROR_INVALID_INDEX );
2125 2126
        return;
    }
2127 2128 2129 2130 2131
    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;
2132
    if (req->flags & SET_WIN_STYLE) win->style = req->style;
2133 2134 2135 2136 2137
    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);
2138
        if (!(win->ex_style & WS_EX_LAYERED)) win->is_layered = 0;
2139
    }
2140 2141
    if (req->flags & SET_WIN_ID) win->id = req->id;
    if (req->flags & SET_WIN_INSTANCE) win->instance = req->instance;
2142
    if (req->flags & SET_WIN_UNICODE) win->is_unicode = req->is_unicode;
2143
    if (req->flags & SET_WIN_USERDATA) win->user_data = req->user_data;
2144 2145
    if (req->flags & SET_WIN_EXTRA) memcpy( win->extra_bytes + req->extra_offset,
                                            &req->extra_value, req->extra_size );
2146 2147 2148

    /* changing window style triggers a non-client paint */
    if (req->flags & SET_WIN_STYLE) win->paint_flags |= PAINT_NONCLIENT;
2149 2150 2151
}


2152 2153 2154 2155 2156
/* 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;
2157
    user_handle_t *data;
2158
    data_size_t len;
2159 2160 2161

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

2162 2163 2164
    reply->count = total;
    len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
    if (len && ((data = set_reply_data_size( len ))))
2165 2166 2167 2168 2169 2170 2171 2172 2173 2174
    {
        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)
{
2175 2176
    struct window *parent = NULL;
    unsigned int total;
2177
    user_handle_t *data;
2178
    data_size_t len;
2179
    struct unicode_str cls_name = get_req_unicode_str();
2180
    atom_t atom = req->atom;
2181
    struct desktop *desktop = NULL;
2182

2183 2184
    if (cls_name.len && !(atom = find_global_atom( NULL, &cls_name ))) return;

2185 2186
    if (req->desktop)
    {
2187
        if (!(desktop = get_desktop_obj( current->process, req->desktop, DESKTOP_ENUMERATE ))) return;
2188 2189
        parent = desktop->top_window;
    }
2190 2191 2192 2193 2194
    else
    {
        if (req->parent && !(parent = get_window( req->parent ))) return;
        if (!parent && !(desktop = get_thread_desktop( current, 0 ))) return;
    }
2195

2196 2197 2198 2199 2200 2201
    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 );

2202 2203 2204
    reply->count = total;
    len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
    if (len && ((data = set_reply_data_size( len ))))
2205
    {
2206 2207
        if (parent) get_children_windows( parent, atom, req->tid, data, len / sizeof(user_handle_t) );
        else
2208
        {
2209 2210 2211 2212 2213 2214 2215
            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) );
2216
        }
2217
    }
2218
    if (desktop) release_object( desktop );
2219 2220 2221
}


2222 2223 2224 2225 2226
/* 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 );
2227
    data_size_t len;
2228 2229 2230 2231 2232 2233

    if (!parent) return;

    array.handles = NULL;
    array.count = 0;
    array.total = 0;
2234
    if (!all_windows_from_point( parent, req->x, req->y, req->dpi, &array )) return;
2235 2236 2237 2238 2239 2240 2241 2242

    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 );
}


2243 2244 2245
/* get window tree information from a window handle */
DECL_HANDLER(get_window_tree)
{
2246
    struct window *ptr, *win = get_window( req->handle );
2247 2248 2249

    if (!win) return;

2250 2251 2252 2253 2254 2255 2256 2257 2258
    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;

2259 2260 2261
    if (win->parent)
    {
        struct window *parent = win->parent;
2262 2263
        reply->parent = parent->handle;
        reply->owner  = win->owner;
2264 2265 2266 2267 2268
        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;
        }
2269 2270 2271 2272 2273
        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;
2274
}
2275 2276


2277 2278
/* set the position and Z order of a window */
DECL_HANDLER(set_window_pos)
2279
{
2280 2281
    rectangle_t window_rect, client_rect, visible_rect, surface_rect, valid_rect;
    const rectangle_t *extra_rects = get_req_data();
2282
    struct window *previous = NULL;
2283
    struct window *top, *win = get_window( req->handle );
2284
    unsigned int flags = req->swp_flags;
2285

2286 2287 2288 2289 2290
    if (!win) return;
    if (!win->parent) flags |= SWP_NOZORDER;  /* no Z order for the desktop */

    if (!(flags & SWP_NOZORDER))
    {
2291
        switch ((int)req->previous)
2292
        {
2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305
        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:
2306 2307 2308 2309 2310 2311 2312
            if (!(previous = get_window( req->previous ))) return;
            /* previous must be a sibling */
            if (previous->parent != win->parent)
            {
                set_error( STATUS_INVALID_PARAMETER );
                return;
            }
2313
            break;
2314 2315 2316 2317
        }
        if (previous == win) flags |= SWP_NOZORDER;  /* nothing to do */
    }

2318 2319 2320
    /* windows that use UpdateLayeredWindow don't trigger repaints */
    if ((win->ex_style & WS_EX_LAYERED) && !win->is_layered) flags |= SWP_NOREDRAW;

2321 2322
    /* window rectangle must be ordered properly */
    if (req->window.right < req->window.left || req->window.bottom < req->window.top)
2323 2324 2325 2326 2327
    {
        set_error( STATUS_INVALID_PARAMETER );
        return;
    }

2328
    window_rect = req->window;
2329
    client_rect = req->client;
2330 2331 2332 2333 2334 2335
    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;
2336 2337 2338 2339 2340
    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 );
2341 2342
        mirror_rect( &win->parent->client_rect, &surface_rect );
        mirror_rect( &win->parent->client_rect, &valid_rect );
2343 2344
    }

2345
    win->paint_flags = (win->paint_flags & ~PAINT_CLIENT_FLAGS) | (req->paint_flags & PAINT_CLIENT_FLAGS);
2346
    if (win->paint_flags & PAINT_HAS_PIXEL_FORMAT) update_pixel_format_flags( win );
2347

2348 2349
    set_window_pos( win, previous, flags, &window_rect, &client_rect,
                    &visible_rect, &surface_rect, &valid_rect );
2350

2351
    reply->new_style = win->style;
2352
    reply->new_ex_style = win->ex_style;
2353 2354

    top = get_top_clipping_window( win );
2355 2356
    if (is_visible( top ) && (top->paint_flags & PAINT_HAS_SURFACE))
    {
2357
        reply->surface_win = top->handle;
2358 2359
        reply->needs_update = !!(top->paint_flags & (PAINT_HAS_PIXEL_FORMAT | PAINT_PIXEL_FORMAT_CHILD));
    }
2360 2361 2362 2363 2364 2365 2366 2367
}


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

2368 2369 2370 2371 2372 2373 2374 2375 2376 2377
    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 );
2378
        if (win->ex_style & WS_EX_LAYOUTRTL) mirror_rect( &win->client_rect, &reply->window );
2379 2380 2381 2382
        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 );
2383
        if (win->ex_style & WS_EX_LAYOUTRTL) mirror_rect( &win->window_rect, &reply->client );
2384 2385
        break;
    case COORDS_PARENT:
2386 2387 2388 2389 2390
        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 );
        }
2391 2392 2393 2394 2395 2396 2397 2398
        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;
2399
    }
2400 2401
    map_dpi_rect( win, &reply->window, win->dpi, req->dpi );
    map_dpi_rect( win, &reply->client, win->dpi, req->dpi );
2402 2403 2404
}


2405 2406 2407 2408 2409 2410 2411
/* get the window text */
DECL_HANDLER(get_window_text)
{
    struct window *win = get_window( req->handle );

    if (win && win->text)
    {
2412 2413
        reply->length = strlenW( win->text );
        set_reply_data( win->text, min( reply->length * sizeof(WCHAR), get_reply_max_size() ));
2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425
    }
}


/* set the window text */
DECL_HANDLER(set_window_text)
{
    struct window *win = get_window( req->handle );

    if (win)
    {
        WCHAR *text = NULL;
2426
        data_size_t len = get_req_data_size() / sizeof(WCHAR);
2427 2428 2429
        if (len)
        {
            if (!(text = mem_alloc( (len+1) * sizeof(WCHAR) ))) return;
2430
            memcpy( text, get_req_data(), len * sizeof(WCHAR) );
2431 2432
            text[len] = 0;
        }
2433
        free( win->text );
2434 2435 2436 2437 2438
        win->text = text;
    }
}


2439 2440 2441 2442
/* get the coordinates offset between two windows */
DECL_HANDLER(get_windows_offset)
{
    struct window *win;
2443
    int x, y, mirror_from = 0, mirror_to = 0;
2444

2445
    reply->x = reply->y = 0;
2446 2447 2448
    if (req->from)
    {
        if (!(win = get_window( req->from ))) return;
2449 2450 2451 2452 2453 2454 2455
        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;
2456 2457 2458 2459
    }
    if (req->to)
    {
        if (!(win = get_window( req->to ))) return;
2460 2461 2462 2463 2464 2465 2466
        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;
2467
    }
2468 2469
    if (mirror_from) reply->x = -reply->x;
    reply->mirror = mirror_from ^ mirror_to;
2470 2471 2472
}


2473 2474 2475 2476
/* get the visible region of a window */
DECL_HANDLER(get_visible_region)
{
    struct region *region;
2477
    struct window *top, *win = get_window( req->window );
2478 2479 2480

    if (!win) return;

2481
    top = get_top_clipping_window( win );
2482
    if ((region = get_visible_region( win, req->flags )))
2483
    {
2484 2485 2486
        rectangle_t *data;
        map_win_region_to_screen( win, region );
        data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size );
2487
        if (data) set_reply_data_ptr( data, reply->total_size );
2488
    }
2489
    reply->top_win  = top->handle;
2490
    reply->top_rect = top->surface_rect;
2491

2492 2493 2494 2495 2496 2497 2498
    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
2499
    {
2500 2501 2502 2503
        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;
2504
    }
2505
    reply->paint_flags = win->paint_flags & PAINT_CLIENT_FLAGS;
2506 2507 2508
}


2509 2510 2511 2512 2513 2514 2515 2516 2517 2518
/* 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 )))
    {
2519
        rectangle_t *data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size );
2520 2521 2522 2523 2524 2525
        if (data) set_reply_data_ptr( data, reply->total_size );
    }
    reply->visible_rect = win->visible_rect;
}


2526 2527 2528
/* get the window region */
DECL_HANDLER(get_window_region)
{
2529
    rectangle_t *data;
2530 2531 2532
    struct window *win = get_window( req->window );

    if (!win) return;
2533
    if (!win->win_region) return;
2534

2535
    if (win->ex_style & WS_EX_LAYOUTRTL)
2536
    {
2537 2538 2539 2540 2541 2542 2543 2544 2545 2546
        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 );
2547
    }
2548 2549 2550
    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 );
2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565
}


/* 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;
2566
        if (win->ex_style & WS_EX_LAYOUTRTL) mirror_region( &win->window_rect, region );
2567
    }
2568
    set_window_region( win, region, req->redraw );
2569 2570 2571
}


2572 2573 2574 2575 2576
/* get a window update region */
DECL_HANDLER(get_update_region)
{
    rectangle_t *data;
    unsigned int flags = req->flags;
2577
    struct window *from_child = NULL;
2578 2579 2580
    struct window *win = get_window( req->window );

    reply->flags = 0;
2581
    if (!win) return;
2582

2583
    if (req->from_child)
2584 2585 2586
    {
        struct window *ptr;

2587
        if (!(from_child = get_window( req->from_child ))) return;
2588

2589 2590 2591 2592
        /* make sure from_child is a child of win */
        ptr = from_child;
        while (ptr && ptr != win) ptr = ptr->parent;
        if (!ptr)
2593
        {
2594 2595
            set_error( STATUS_INVALID_PARAMETER );
            return;
2596 2597 2598
        }
    }

2599 2600 2601 2602 2603 2604
    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;
    }

2605
    reply->flags = get_window_update_flags( win, from_child, flags, &win );
2606 2607 2608 2609 2610 2611
    reply->child = win->handle;

    if (flags & UPDATE_NOREGION) return;

    if (win->update_region)
    {
2612 2613 2614 2615 2616 2617 2618 2619 2620
        /* 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;
        }
2621 2622 2623
        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 );
2624 2625 2626
        map_win_region_to_screen( win, region );
        if (!(data = get_region_data_and_free( region, get_reply_max_size(),
                                               &reply->total_size ))) return;
2627 2628 2629 2630 2631
        set_reply_data_ptr( data, reply->total_size );
    }

    if (reply->flags & (UPDATE_PAINT|UPDATE_INTERNALPAINT)) /* validate everything */
    {
2632
        validate_parents( win );
2633 2634 2635 2636 2637
        validate_whole_window( win );
    }
    else
    {
        if (reply->flags & UPDATE_NONCLIENT) validate_non_client( win );
2638 2639
        if (reply->flags & UPDATE_ERASE)
        {
2640
            win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE);
2641
            /* desktop window only gets erased, not repainted */
2642
            if (is_desktop_window(win)) validate_whole_window( win );
2643
        }
2644 2645 2646 2647
    }
}


2648 2649 2650
/* update the z order of a window so that a given rectangle is fully visible */
DECL_HANDLER(update_window_zorder)
{
2651
    rectangle_t tmp, rect = req->rect;
2652 2653 2654 2655 2656 2657 2658 2659 2660
    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;
2661
        if (ptr->is_layered && (ptr->layered_flags & LWA_COLORKEY)) continue;
2662 2663 2664
        tmp = rect;
        map_dpi_rect( win, &tmp, win->parent->dpi, win->dpi );
        if (!intersect_rect( &tmp, &tmp, &ptr->visible_rect )) continue;
2665 2666 2667 2668 2669
        if (ptr->win_region)
        {
            offset_rect( &tmp, -ptr->window_rect.left, -ptr->window_rect.top );
            if (!rect_in_region( ptr->win_region, &tmp )) continue;
        }
2670
        /* found a window obscuring the rectangle, now move win above this one */
2671 2672 2673 2674 2675 2676
        /* 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 );
        }
2677 2678 2679 2680 2681
        break;
    }
}


2682 2683 2684
/* mark parts of a window as needing a redraw */
DECL_HANDLER(redraw_window)
{
2685
    unsigned int flags = req->flags;
2686
    struct region *region = NULL;
2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697
    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;
    }
2698 2699 2700

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

2701
    if (flags & (RDW_VALIDATE|RDW_INVALIDATE))
2702 2703 2704 2705 2706
    {
        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;
2707
            if (win->ex_style & WS_EX_LAYOUTRTL) mirror_region( &win->client_rect, region );
2708 2709 2710
        }
    }

2711
    redraw_window( win, region, (flags & RDW_INVALIDATE) && (flags & RDW_FRAME), flags );
2712 2713 2714 2715
    if (region) free_region( region );
}


2716 2717 2718
/* set a window property */
DECL_HANDLER(set_window_property)
{
2719
    struct unicode_str name = get_req_unicode_str();
2720 2721
    struct window *win = get_window( req->window );

2722 2723
    if (!win) return;

2724
    if (name.len)
2725
    {
2726
        atom_t atom = add_global_atom( NULL, &name );
2727 2728
        if (atom)
        {
2729
            set_property( win, atom, req->data, PROP_TYPE_STRING );
2730
            release_global_atom( NULL, atom );
2731 2732
        }
    }
2733
    else set_property( win, req->atom, req->data, PROP_TYPE_ATOM );
2734 2735 2736 2737 2738 2739
}


/* remove a window property */
DECL_HANDLER(remove_window_property)
{
2740
    struct unicode_str name = get_req_unicode_str();
2741
    struct window *win = get_window( req->window );
2742

2743
    if (win)
2744
    {
2745
        atom_t atom = name.len ? find_global_atom( NULL, &name ) : req->atom;
2746
        if (atom) reply->data = remove_property( win, atom );
2747
    }
2748 2749 2750 2751 2752 2753
}


/* get a window property */
DECL_HANDLER(get_window_property)
{
2754
    struct unicode_str name = get_req_unicode_str();
2755
    struct window *win = get_window( req->window );
2756

2757
    if (win)
2758
    {
2759
        atom_t atom = name.len ? find_global_atom( NULL, &name ) : req->atom;
2760
        if (atom) reply->data = get_property( win, atom );
2761
    }
2762 2763 2764 2765 2766 2767
}


/* get the list of properties of a window */
DECL_HANDLER(get_window_properties)
{
2768 2769
    property_data_t *data;
    int i, count, max = get_reply_max_size() / sizeof(*data);
2770 2771
    struct window *win = get_window( req->window );

2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786
    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);
2787
        data->data   = win->properties[i].data;
2788 2789 2790
        data++;
        count--;
    }
2791
}
2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802


/* 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;
    }
2803 2804 2805 2806 2807
    else if (*win)
    {
        set_error( STATUS_ACCESS_DENIED );
        return 0;
    }
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 2840 2841 2842
    *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;
}
2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869

/* 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)
    {
2870 2871
        int was_layered = win->is_layered;

2872 2873 2874 2875 2876 2877
        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;
2878
        /* repaint since we know now it's not going to use UpdateLayeredWindow */
2879
        if (!was_layered) redraw_window( win, 0, 1, RDW_ALLCHILDREN | RDW_INVALIDATE | RDW_ERASE | RDW_FRAME );
2880 2881 2882
    }
    else set_win32_error( ERROR_INVALID_WINDOW_HANDLE );
}