window.c 92.7 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      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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    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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/* 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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/* 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 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;
    if (!win) rect->left = rect->top = rect->right = rect->bottom = 0;
    else *rect = win->window_rect;
}

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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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    static const rectangle_t empty_rect;
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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->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->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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/* check if window and all its ancestors are visible */
static int is_visible( const struct window *win )
{
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    while (win)
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    {
        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 );
}

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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);
}

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/* check if point is inside the window */
static inline int is_point_in_window( struct window *win, int x, int y )
{
    if (!(win->style & WS_VISIBLE)) return 0; /* not visible */
    if ((win->style & (WS_POPUP|WS_CHILD|WS_DISABLED)) == (WS_CHILD|WS_DISABLED))
        return 0;  /* disabled child */
    if ((win->ex_style & (WS_EX_LAYERED|WS_EX_TRANSPARENT)) == (WS_EX_LAYERED|WS_EX_TRANSPARENT))
        return 0;  /* transparent */
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    if (x < win->visible_rect.left || x >= win->visible_rect.right ||
        y < win->visible_rect.top || y >= win->visible_rect.bottom)
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        return 0;  /* not in window */
    if (win->win_region &&
        !point_in_region( win->win_region, x - win->window_rect.left, y - win->window_rect.top ))
        return 0;  /* not in window region */
    return 1;
}

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/* 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;
}

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/* 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 )
{
685
    struct window *ptr;
686

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    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
688
    {
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        if (!is_point_in_window( ptr, x, y )) continue;  /* skip it */
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        /* if window is minimized or disabled, return at once */
        if (ptr->style & (WS_MINIMIZE|WS_DISABLED)) return ptr;

        /* if point is not in client area, return at once */
        if (x < ptr->client_rect.left || x >= ptr->client_rect.right ||
            y < ptr->client_rect.top || y >= ptr->client_rect.bottom)
            return ptr;

        return child_window_from_point( ptr, x - ptr->client_rect.left, y - ptr->client_rect.top );
    }
    return parent;  /* not found any child */
}

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/* 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;

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    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
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    {
        if (!is_point_in_window( ptr, x, y )) continue;  /* skip it */

        /* if point is in client area, and window is not minimized or disabled, check children */
        if (!(ptr->style & (WS_MINIMIZE|WS_DISABLED)) &&
            x >= ptr->client_rect.left && x < ptr->client_rect.right &&
            y >= ptr->client_rect.top && y < ptr->client_rect.bottom)
        {
            if (!get_window_children_from_point( ptr, x - ptr->client_rect.left,
                                                 y - ptr->client_rect.top, array ))
                return 0;
        }

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

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/* get handle of root of top-most window containing point */
user_handle_t shallow_window_from_point( struct desktop *desktop, int x, int y )
732
{
733
    struct window *ptr;
734

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    if (!desktop->top_window) return 0;
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    LIST_FOR_EACH_ENTRY( ptr, &desktop->top_window->children, struct window, entry )
    {
        if (!is_point_in_window( ptr, x, y )) continue;  /* skip it */
        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 );
    struct window *ptr;

    if (!win) return NULL;

    for (ptr = win; ptr && !is_desktop_window(ptr); ptr = ptr->parent)
    {
        x -= ptr->client_rect.left;
        y -= ptr->client_rect.top;
    }

    ptr =  child_window_from_point( win, x, y );
    if (!ptr->thread) return NULL;
    return (struct thread *)grab_object( ptr->thread );
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}
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/* return list of all windows containing point (in absolute coords) */
static int all_windows_from_point( struct window *top, int x, int y, struct user_handle_array *array )
{
    struct window *ptr;

    /* make point relative to top window */
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    for (ptr = top->parent; ptr && !is_desktop_window(ptr); ptr = ptr->parent)
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    {
        x -= ptr->client_rect.left;
        y -= ptr->client_rect.top;
    }

    if (!is_point_in_window( top, x, y )) return 1;

    /* if point is in client area, and window is not minimized or disabled, check children */
    if (!(top->style & (WS_MINIMIZE|WS_DISABLED)) &&
        x >= top->client_rect.left && x < top->client_rect.right &&
        y >= top->client_rect.top && y < top->client_rect.bottom)
    {
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        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;
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    }
    /* now add window to the array */
    if (!add_handle_to_array( array, top->handle )) return 0;
    return 1;
}


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/* 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 );
}
803

804 805 806 807 808 809 810 811

/* 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);
}


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/* 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;

817
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
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    {
        if (!(ptr->style & WS_VISIBLE)) continue;
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        if (ptr->thread == thread && win_needs_repaint( ptr ))
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            ret = ptr;
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        else if (!(ptr->style & WS_MINIMIZE)) /* explore its children */
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            ret = find_child_to_repaint( ptr, thread );
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        if (ret) break;
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    }

    if (ret && (ret->ex_style & WS_EX_TRANSPARENT))
    {
        /* transparent window, check for non-transparent sibling to paint first */
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        for (ptr = get_next_window(ret); ptr; ptr = get_next_window(ptr))
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        {
            if (!(ptr->style & WS_VISIBLE)) continue;
            if (ptr->ex_style & WS_EX_TRANSPARENT) continue;
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            if (ptr->thread != thread) continue;
            if (win_needs_repaint( ptr )) return ptr;
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        }
    }
    return ret;
}


842
/* find a window that needs to receive a WM_PAINT; also clear its internal paint flag */
843 844
user_handle_t find_window_to_repaint( user_handle_t parent, struct thread *thread )
{
845
    struct window *ptr, *win, *top_window = get_desktop_window( thread );
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    if (!top_window) return 0;
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    if (top_window->thread == thread && win_needs_repaint( top_window )) win = top_window;
    else win = find_child_to_repaint( top_window, thread );

852
    if (win && parent)
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    {
        /* check that it is a child of the specified parent */
        for (ptr = win; ptr; ptr = ptr->parent)
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            if (ptr->handle == parent) break;
857
        /* otherwise don't return any window, we don't repaint a child before its parent */
858
        if (!ptr) win = NULL;
859
    }
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    if (!win) return 0;
    win->paint_flags &= ~PAINT_INTERNAL;
    return win->handle;
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}


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/* 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;
}


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/* convert coordinates from client to screen coords */
static inline void client_to_screen( struct window *win, int *x, int *y )
{
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    for ( ; win && !is_desktop_window(win); win = win->parent)
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    {
        *x += win->client_rect.left;
        *y += win->client_rect.top;
    }
}

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/* convert coordinates from client to screen coords */
static inline void client_to_screen_rect( struct window *win, rectangle_t *rect )
{
    for ( ; win && !is_desktop_window(win); win = win->parent)
    {
        rect->left   += win->client_rect.left;
        rect->right  += win->client_rect.left;
        rect->top    += win->client_rect.top;
        rect->bottom += win->client_rect.top;
    }
}

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/* map the region from window to screen coordinates */
static inline void map_win_region_to_screen( struct window *win, struct region *region )
{
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    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 );
    }
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}


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/* 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;
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    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
922
    {
923
        if (ptr == last) break;
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        if (!(ptr->style & WS_VISIBLE)) continue;
        if (ptr->ex_style & WS_EX_TRANSPARENT) continue;
926
        set_region_rect( tmp, &ptr->visible_rect );
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        if (ptr->win_region && !intersect_window_region( tmp, ptr ))
        {
            free_region( tmp );
            return NULL;
        }
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        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;
}


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/* offset the coordinates of a rectangle */
static inline void offset_rect( rectangle_t *rect, int offset_x, int offset_y )
{
    rect->left   += offset_x;
    rect->top    += offset_y;
    rect->right  += offset_x;
    rect->bottom += offset_y;
}


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/* 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;

956
    intersect_rect( &rect, &win->window_rect, &win->client_rect );
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    set_region_rect( region, &rect );
}


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/* get the top-level window to clip against for a given window */
static inline struct window *get_top_clipping_window( struct window *win )
{
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    while (!(win->paint_flags & PAINT_HAS_SURFACE) && win->parent && !is_desktop_window(win->parent))
        win = win->parent;
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    return win;
}


970
/* compute the visible region of a window, in window coordinates */
971
static struct region *get_visible_region( struct window *win, unsigned int flags )
972
{
973
    struct region *tmp = NULL, *region;
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    int offset_x, offset_y;

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

    /* first check if all ancestors are visible */

980
    if (!is_visible( win )) return region;  /* empty region */
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982
    /* create a region relative to the window itself */
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984
    if ((flags & DCX_PARENTCLIP) && win->parent && !is_desktop_window(win->parent))
985
    {
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        set_region_client_rect( region, win->parent );
        offset_region( region, -win->parent->client_rect.left, -win->parent->client_rect.top );
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    }
    else if (flags & DCX_WINDOW)
    {
991
        set_region_rect( region, &win->visible_rect );
992
        if (win->win_region && !intersect_window_region( region, win )) goto error;
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    }
    else
    {
996
        set_region_client_rect( region, win );
997
        if (win->win_region && !intersect_window_region( region, win )) goto error;
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    }

    /* clip children */

    if (flags & DCX_CLIPCHILDREN)
    {
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        if (is_desktop_window(win)) offset_x = offset_y = 0;
        else
        {
            offset_x = win->client_rect.left;
            offset_y = win->client_rect.top;
        }
        if (!clip_children( win, NULL, region, offset_x, offset_y )) goto error;
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    }

    /* clip siblings of ancestors */

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

1022
    if ((tmp = create_empty_region()) != NULL)
1023
    {
1024
        while (win->parent)
1025
        {
1026 1027
            /* we don't clip out top-level siblings as that's up to the native windowing system */
            if ((win->style & WS_CLIPSIBLINGS) && !is_desktop_window( win->parent ))
1028 1029 1030 1031 1032 1033
            {
                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;
1034 1035 1036 1037 1038 1039
            if (!is_desktop_window(win))
            {
                offset_x += win->client_rect.left;
                offset_y += win->client_rect.top;
                offset_region( region, win->client_rect.left, win->client_rect.top );
            }
1040
            set_region_client_rect( tmp, win );
1041 1042
            if (win->win_region && !intersect_window_region( tmp, win )) goto error;
            if (!intersect_region( region, region, tmp )) goto error;
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            if (is_region_empty( region )) break;
        }
        free_region( tmp );
    }
1047
    offset_region( region, -offset_x, -offset_y );  /* make it relative to target window */
1048 1049 1050
    return region;

error:
1051
    if (tmp) free_region( tmp );
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    free_region( region );
    return NULL;
}


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/* 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;
1077
        if (!(ptr->paint_flags & (PAINT_HAS_PIXEL_FORMAT | PAINT_PIXEL_FORMAT_CHILD))) continue;
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        /* 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;

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

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    /* 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;
}


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/* 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;
1140
    if (!win->class) set_error( STATUS_ACCESS_DENIED );
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    return win->class;
}

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/* determine the window visible rectangle, i.e. window or client rect cropped by parent rects */
/* the returned rectangle is in window coordinates; return 0 if rectangle is empty */
static int get_window_visible_rect( struct window *win, rectangle_t *rect, int frame )
{
    int offset_x = 0, offset_y = 0;

    if (!(win->style & WS_VISIBLE)) return 0;

    *rect = frame ? win->window_rect : win->client_rect;
    if (!is_desktop_window(win))
    {
        offset_x = win->window_rect.left;
        offset_y = win->window_rect.top;
    }

    while (win->parent)
    {
        win = win->parent;
        if (!(win->style & WS_VISIBLE) || win->style & WS_MINIMIZE) return 0;
        if (!is_desktop_window(win))
        {
            offset_x += win->client_rect.left;
            offset_y += win->client_rect.top;
            offset_rect( rect, win->client_rect.left, win->client_rect.top );
        }
        if (!intersect_rect( rect, rect, &win->client_rect )) return 0;
        if (!intersect_rect( rect, rect, &win->window_rect )) return 0;
    }
    offset_rect( rect, -offset_x, -offset_y );
    return 1;
}

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/* 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 )
{
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    rectangle_t rect;
    struct region *tmp;
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    if (!get_window_visible_rect( win, &rect, frame )) return NULL;
    if (!(tmp = create_empty_region())) return NULL;
    set_region_rect( tmp, &rect );
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    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 );
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1193 1194 1195
        /* intersect specified region with bounding rect */
        if (!intersect_region( tmp, region, tmp )) goto done;
        if (is_region_empty( tmp )) goto done;
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1197 1198 1199 1200
        /* map it back to window coords */
        offset_region( tmp, win->client_rect.left - win->window_rect.left,
                       win->client_rect.top - win->window_rect.top );
    }
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    return tmp;

done:
    free_region( tmp );
    return NULL;
}


/* set a region as new update region for the window */
static void set_update_region( struct window *win, struct region *region )
{
    if (region && !is_region_empty( region ))
    {
        if (!win->update_region) inc_window_paint_count( win, 1 );
        else free_region( win->update_region );
        win->update_region = region;
    }
    else
    {
Rob Shearman's avatar
Rob Shearman committed
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        if (win->update_region)
        {
            inc_window_paint_count( win, -1 );
            free_region( win->update_region );
        }
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        win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE | PAINT_NONCLIENT);
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        win->update_region = NULL;
        if (region) free_region( region );
    }
}


/* add a region to the update region; the passed region is freed or reused */
static int add_update_region( struct window *win, struct region *region )
{
    if (win->update_region && !union_region( region, win->update_region, region ))
    {
        free_region( region );
        return 0;
    }
    set_update_region( win, region );
    return 1;
}


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/* crop the update region of children to the specified rectangle, in client coords */
static void crop_children_update_region( struct window *win, rectangle_t *rect )
{
    struct window *child;
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    struct region *tmp;
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    rectangle_t child_rect;

    LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry )
    {
        if (!(child->style & WS_VISIBLE)) continue;
        if (!rect)  /* crop everything out */
        {
            crop_children_update_region( child, NULL );
            set_update_region( child, NULL );
            continue;
        }

        /* nothing to do if child is completely inside rect */
        if (child->window_rect.left >= rect->left &&
            child->window_rect.top >= rect->top &&
            child->window_rect.right <= rect->right &&
            child->window_rect.bottom <= rect->bottom) continue;

        /* map to child client coords and crop grand-children */
        child_rect = *rect;
        offset_rect( &child_rect, -child->client_rect.left, -child->client_rect.top );
        crop_children_update_region( child, &child_rect );

        /* now crop the child itself */
        if (!child->update_region) continue;
        if (!(tmp = create_empty_region())) continue;
        set_region_rect( tmp, rect );
        offset_region( tmp, -child->window_rect.left, -child->window_rect.top );
        if (intersect_region( tmp, child->update_region, tmp )) set_update_region( child, tmp );
        else free_region( tmp );
    }
}


1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297
/* 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;

1298
    if ((tmp = create_empty_region()))
1299
    {
1300
        set_region_rect( tmp, &rect );
1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322
        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 );
    }
}


1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336
/* 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);
    }
}


1337
/* validate the update region of a window on all parents; helper for get_update_region */
1338 1339 1340 1341 1342 1343 1344 1345
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;

1346
    while (win->parent)
1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407
    {
        /* map to parent client coords */
        offset_x += win->window_rect.left;
        offset_y += win->window_rect.top;

        win = win->parent;

        /* and now map to window coords */
        offset_x += win->client_rect.left - win->window_rect.left;
        offset_y += win->client_rect.top - win->window_rect.top;

        if (win->update_region && !(win->style & WS_CLIPCHILDREN))
        {
            if (!tmp && !(tmp = create_empty_region())) return;
            offset_region( child->update_region, offset_x, offset_y );
            if (subtract_region( tmp, win->update_region, child->update_region ))
            {
                set_update_region( win, tmp );
                tmp = NULL;
            }
            /* restore child coords */
            offset_region( child->update_region, -offset_x, -offset_y );
        }
    }
    if (tmp) free_region( tmp );
}


/* add/subtract a region (in client coordinates) to the update region of the window */
static void redraw_window( struct window *win, struct region *region, int frame, unsigned int flags )
{
    struct region *tmp;
    struct window *child;

    if (flags & RDW_INVALIDATE)
    {
        if (!(tmp = crop_region_to_win_rect( win, region, frame ))) return;

        if (!add_update_region( win, tmp )) return;

        if (flags & RDW_FRAME) win->paint_flags |= PAINT_NONCLIENT;
        if (flags & RDW_ERASE) win->paint_flags |= PAINT_ERASE;
    }
    else if (flags & RDW_VALIDATE)
    {
        if (!region && (flags & RDW_NOFRAME))  /* shortcut: validate everything */
        {
            set_update_region( win, NULL );
        }
        else if (win->update_region)
        {
            if ((tmp = crop_region_to_win_rect( win, region, frame )))
            {
                if (!subtract_region( tmp, win->update_region, tmp ))
                {
                    free_region( tmp );
                    return;
                }
                set_update_region( win, tmp );
            }
            if (flags & RDW_NOFRAME) validate_non_client( win );
1408
            if (flags & RDW_NOERASE) win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE);
1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436
        }
    }

    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;

1437
    LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry )
1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463
    {
        if (!(child->style & WS_VISIBLE)) continue;
        if (!rect_in_region( tmp, &child->window_rect )) continue;
        offset_region( tmp, -child->client_rect.left, -child->client_rect.top );
        redraw_window( child, tmp, 1, flags );
        offset_region( tmp, child->client_rect.left, child->client_rect.top );
    }
    free_region( tmp );
}


/* retrieve the update flags for a window depending on the state of the update region */
static unsigned int get_update_flags( struct window *win, unsigned int flags )
{
    unsigned int ret = 0;

    if (flags & UPDATE_NONCLIENT)
    {
        if ((win->paint_flags & PAINT_NONCLIENT) && win->update_region) ret |= UPDATE_NONCLIENT;
    }
    if (flags & UPDATE_ERASE)
    {
        if ((win->paint_flags & PAINT_ERASE) && win->update_region) ret |= UPDATE_ERASE;
    }
    if (flags & UPDATE_PAINT)
    {
1464 1465 1466 1467 1468
        if (win->update_region)
        {
            if (win->paint_flags & PAINT_DELAYED_ERASE) ret |= UPDATE_DELAYED_ERASE;
            ret |= UPDATE_PAINT;
        }
1469 1470 1471
    }
    if (flags & UPDATE_INTERNALPAINT)
    {
1472 1473 1474 1475 1476
        if (win->paint_flags & PAINT_INTERNAL)
        {
            ret |= UPDATE_INTERNALPAINT;
            if (win->paint_flags & PAINT_DELAYED_ERASE) ret |= UPDATE_DELAYED_ERASE;
        }
1477 1478 1479 1480 1481 1482
    }
    return ret;
}


/* iterate through the children of the given window until we find one with some update flags */
1483 1484
static unsigned int get_child_update_flags( struct window *win, struct window *from_child,
                                            unsigned int flags, struct window **child )
1485 1486 1487 1488
{
    struct window *ptr;
    unsigned int ret = 0;

1489 1490 1491 1492 1493 1494 1495 1496 1497 1498
    /* 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;

1499
    LIST_FOR_EACH_ENTRY( ptr, &win->children, struct window, entry )
1500
    {
1501 1502 1503 1504 1505
        if (from_child)  /* skip all children until from_child is found */
        {
            if (ptr == from_child) from_child = NULL;
            continue;
        }
1506 1507 1508 1509 1510 1511
        if (!(ptr->style & WS_VISIBLE)) continue;
        if ((ret = get_update_flags( ptr, flags )) != 0)
        {
            *child = ptr;
            break;
        }
1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526
        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;
1527
    for (ptr = from_child; ptr; ptr = ptr->parent)
1528 1529 1530 1531 1532 1533 1534 1535 1536 1537
    {
        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)))
    {
1538
        for (ptr = win->parent; ptr; ptr = ptr->parent)
1539
        {
1540 1541 1542 1543 1544
            if (!(ptr->style & WS_CLIPCHILDREN) && win_needs_repaint( ptr ))
                return 0;
        }
        if (from_child && !(flags & UPDATE_ALLCHILDREN))
        {
1545
            for (ptr = from_sibling ? from_sibling : from_child; ptr; ptr = ptr->parent)
1546 1547 1548 1549
            {
                if (!(ptr->style & WS_CLIPCHILDREN) && win_needs_repaint( ptr )) from_sibling = ptr;
                if (ptr == win) break;
            }
1550
        }
1551
    }
1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583


    /* 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;
1584 1585 1586
}


1587 1588 1589 1590
/* 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 )
1591
{
1592
    struct region *new_vis_rgn, *exposed_rgn;
1593

1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610
    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;
        }
    }

1611
    if (win->parent && !is_desktop_window( win->parent ))
1612
    {
1613 1614 1615 1616 1617 1618 1619 1620 1621 1622
        /* 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 ))
            {
1623 1624
                /* make it relative to parent */
                offset_region( new_vis_rgn, old_window_rect->left, old_window_rect->top );
1625 1626 1627
                redraw_window( win->parent, new_vis_rgn, 0, RDW_INVALIDATE | RDW_ERASE | RDW_ALLCHILDREN );
            }
        }
1628
    }
1629 1630
    free_region( new_vis_rgn );
    return exposed_rgn;
1631 1632 1633 1634
}


/* set the window and client rectangles, updating the update region if necessary */
1635
static void set_window_pos( struct window *win, struct window *previous,
1636
                            unsigned int swp_flags, const rectangle_t *window_rect,
1637 1638
                            const rectangle_t *client_rect, const rectangle_t *visible_rect,
                            const rectangle_t *valid_rects )
1639
{
1640
    struct region *old_vis_rgn = NULL, *exposed_rgn = NULL;
1641
    const rectangle_t old_window_rect = win->window_rect;
1642
    const rectangle_t old_visible_rect = win->visible_rect;
1643
    const rectangle_t old_client_rect = win->client_rect;
1644
    rectangle_t rect;
1645
    int client_changed, frame_changed;
1646
    int visible = (win->style & WS_VISIBLE) || (swp_flags & SWP_SHOWWINDOW);
1647

1648
    if (win->parent && !is_visible( win->parent )) visible = 0;
1649

1650
    if (visible && !(old_vis_rgn = get_visible_region( win, DCX_WINDOW ))) return;
1651 1652 1653

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

1654
    win->window_rect  = *window_rect;
1655
    win->visible_rect = *visible_rect;
1656
    win->client_rect  = *client_rect;
1657
    if (!(swp_flags & SWP_NOZORDER) && win->parent) link_window( win, previous );
1658 1659 1660
    if (swp_flags & SWP_SHOWWINDOW) win->style |= WS_VISIBLE;
    else if (swp_flags & SWP_HIDEWINDOW) win->style &= ~WS_VISIBLE;

1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675
    /* keep children at the same position relative to top right corner when the parent is mirrored */
    if (win->ex_style & WS_EX_LAYOUTRTL)
    {
        struct window *child;
        int old_size = old_client_rect.right - old_client_rect.left;
        int new_size = win->client_rect.right - win->client_rect.left;

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

1676
    /* reset cursor clip rectangle when the desktop changes size */
1677
    if (win == win->desktop->top_window) win->desktop->cursor.clip = *window_rect;
1678

1679 1680 1681
    /* if the window is not visible, everything is easy */
    if (!visible) return;

1682 1683
    /* expose anything revealed by the change */

1684
    if (!(swp_flags & SWP_NOREDRAW))
1685
        exposed_rgn = expose_window( win, &old_window_rect, old_vis_rgn );
1686 1687 1688 1689 1690

    if (!(win->style & WS_VISIBLE))
    {
        /* clear the update region since the window is no longer visible */
        validate_whole_window( win );
1691
        validate_children( win );
1692 1693 1694
        goto done;
    }

1695 1696
    /* crop update region to the new window rect */

1697
    if (win->update_region)
1698
    {
1699
        if (get_window_visible_rect( win, &rect, 1 ))
1700
        {
1701 1702 1703 1704 1705 1706 1707 1708 1709
            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 );
            }
1710
        }
1711
        else set_update_region( win, NULL ); /* visible rect is empty */
1712 1713
    }

1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724
    /* 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 );

1725 1726
    if (swp_flags & SWP_NOREDRAW) goto done;  /* do not repaint anything */

1727 1728
    /* expose the whole non-client area if it changed in any way */

1729 1730 1731
    if (swp_flags & SWP_NOCOPYBITS)
    {
        frame_changed = ((swp_flags & SWP_FRAMECHANGED) ||
1732 1733
                         memcmp( window_rect, &old_window_rect, sizeof(old_window_rect) ) ||
                         memcmp( visible_rect, &old_visible_rect, sizeof(old_visible_rect) ));
1734 1735 1736 1737 1738 1739 1740 1741 1742
        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 ||
1743 1744 1745 1746 1747
                         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);
1748 1749 1750
        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 ||
1751 1752 1753
                          client_rect->bottom - old_client_rect.bottom != y_offset ||
                          !valid_rects ||
                          memcmp( &valid_rects[0], client_rect, sizeof(*client_rect) ));
1754 1755 1756
    }

    if (frame_changed || client_changed)
1757
    {
1758
        struct region *win_rgn = old_vis_rgn;  /* reuse previous region */
1759

1760 1761
        set_region_rect( win_rgn, window_rect );
        if (valid_rects)
1762
        {
1763
            /* subtract the valid portion of client rect from the total region */
1764 1765
            struct region *tmp = create_empty_region();
            if (tmp)
1766
            {
1767
                set_region_rect( tmp, &valid_rects[0] );
1768 1769 1770 1771 1772 1773 1774
                /* 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 );
                }
1775 1776
                if (subtract_region( tmp, win_rgn, tmp )) win_rgn = tmp;
                else free_region( tmp );
1777 1778
            }
        }
1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790
        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;
        }
1791 1792
    }

1793 1794 1795
    if (exposed_rgn)
        redraw_window( win, exposed_rgn, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN );

1796
done:
1797
    if (old_vis_rgn) free_region( old_vis_rgn );
1798
    if (exposed_rgn) free_region( exposed_rgn );
1799 1800 1801
    clear_error();  /* we ignore out of memory errors once the new rects have been set */
}

1802

1803 1804 1805
/* set the window region, updating the update region if necessary */
static void set_window_region( struct window *win, struct region *region, int redraw )
{
1806
    struct region *old_vis_rgn = NULL, *exposed_rgn;
1807 1808 1809 1810

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

1811
    if (redraw) old_vis_rgn = get_visible_region( win, DCX_WINDOW );
1812 1813 1814 1815

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

1816 1817
    /* expose anything revealed by the change */
    if (old_vis_rgn && ((exposed_rgn = expose_window( win, &win->window_rect, old_vis_rgn ))))
1818
    {
1819 1820
        redraw_window( win, exposed_rgn, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN );
        free_region( exposed_rgn );
1821 1822 1823 1824 1825 1826 1827
    }

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


1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856
/* 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;
1857
    free_hotkeys( win->desktop, win->handle );
1858 1859 1860 1861 1862 1863 1864 1865 1866 1867
    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;
    }
1868 1869 1870 1871 1872
    else if (is_desktop_window( win->parent ))
    {
        post_message( win->parent->handle, WM_PARENTNOTIFY, WM_DESTROY, win->handle );
    }

1873 1874 1875 1876 1877 1878 1879 1880 1881 1882
    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 );
}


1883 1884
/* create a window */
DECL_HANDLER(create_window)
1885
{
1886
    struct window *win, *parent = NULL, *owner = NULL;
1887
    struct unicode_str cls_name;
1888
    atom_t atom;
1889

1890
    reply->handle = 0;
1891
    if (req->parent && !(parent = get_window( req->parent ))) return;
1892

1893 1894 1895 1896
    if (req->owner)
    {
        if (!(owner = get_window( req->owner ))) return;
        if (is_desktop_window(owner)) owner = NULL;
1897
        else if (parent && !is_desktop_window(parent))
1898
        {
1899
            /* an owned window must be created as top-level */
1900 1901 1902
            set_error( STATUS_ACCESS_DENIED );
            return;
        }
1903 1904
        else /* owner must be a top-level window */
            while (!is_desktop_window(owner->parent)) owner = owner->parent;
1905
    }
1906

1907 1908
    get_req_unicode_str( &cls_name );
    atom = cls_name.len ? find_global_atom( NULL, &cls_name ) : req->atom;
1909 1910

    if (!(win = create_window( parent, owner, atom, req->instance ))) return;
1911

1912
    reply->handle    = win->handle;
1913 1914
    reply->parent    = win->parent ? win->parent->handle : 0;
    reply->owner     = win->owner;
1915 1916
    reply->extra     = win->nb_extra_bytes;
    reply->class_ptr = get_class_client_ptr( win->class );
1917 1918 1919
}


1920 1921
/* set the parent of a window */
DECL_HANDLER(set_parent)
1922
{
1923
    struct window *win, *parent = NULL;
1924

1925 1926
    if (!(win = get_window( req->handle ))) return;
    if (req->parent && !(parent = get_window( req->parent ))) return;
1927

1928
    if (is_desktop_window(win))
1929 1930 1931 1932
    {
        set_error( STATUS_INVALID_PARAMETER );
        return;
    }
1933
    reply->old_parent  = win->parent->handle;
1934
    reply->full_parent = parent ? parent->handle : 0;
1935
    set_parent_window( win, parent );
1936 1937 1938 1939 1940 1941
}


/* destroy a window */
DECL_HANDLER(destroy_window)
{
1942
    struct window *win = get_window( req->handle );
1943 1944
    if (win)
    {
1945
        if (!is_desktop_window(win)) destroy_window( win );
1946
        else if (win->thread == current) detach_window_thread( win );
1947 1948 1949 1950 1951
        else set_error( STATUS_ACCESS_DENIED );
    }
}


1952 1953 1954
/* retrieve the desktop window for the current thread */
DECL_HANDLER(get_desktop_window)
{
1955
    struct desktop *desktop = get_thread_desktop( current, 0 );
1956

1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982
    if (!desktop) return;

    if (!desktop->top_window && req->force)  /* create it */
    {
        if ((desktop->top_window = create_window( NULL, NULL, DESKTOP_ATOM, 0 )))
        {
            detach_window_thread( desktop->top_window );
            desktop->top_window->style  = WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
        }
    }

    if (!desktop->msg_window && req->force)  /* create it */
    {
        static const WCHAR messageW[] = {'M','e','s','s','a','g','e'};
        static const struct unicode_str name = { messageW, sizeof(messageW) };
        atom_t atom = add_global_atom( NULL, &name );
        if (atom && (desktop->msg_window = create_window( NULL, NULL, atom, 0 )))
        {
            detach_window_thread( desktop->msg_window );
            desktop->msg_window->style = WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
        }
    }

    reply->top_window = desktop->top_window ? desktop->top_window->handle : 0;
    reply->msg_window = desktop->msg_window ? desktop->msg_window->handle : 0;
    release_object( desktop );
1983 1984 1985
}


1986 1987 1988 1989
/* set a window owner */
DECL_HANDLER(set_window_owner)
{
    struct window *win = get_window( req->handle );
1990
    struct window *owner = NULL, *ptr;
1991

1992 1993
    if (!win) return;
    if (req->owner && !(owner = get_window( req->owner ))) return;
1994
    if (is_desktop_window(win))
1995 1996 1997 1998
    {
        set_error( STATUS_ACCESS_DENIED );
        return;
    }
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

    /* 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;
        }
    }

2010 2011
    reply->prev_owner = win->owner;
    reply->full_owner = win->owner = owner ? owner->handle : 0;
2012 2013 2014
}


2015
/* get information from a window handle */
2016 2017
DECL_HANDLER(get_window_info)
{
2018
    struct window *win = get_window( req->handle );
2019

2020 2021
    reply->full_handle = 0;
    reply->tid = reply->pid = 0;
2022 2023
    if (win)
    {
2024
        reply->full_handle = win->handle;
2025
        reply->last_active = win->handle;
2026
        reply->is_unicode  = win->is_unicode;
2027
        if (get_user_object( win->last_active, USER_WINDOW )) reply->last_active = win->last_active;
2028 2029
        if (win->thread)
        {
2030 2031
            reply->tid  = get_thread_id( win->thread );
            reply->pid  = get_process_id( win->thread->process );
2032
            reply->atom = win->class ? get_class_atom( win->class ) : DESKTOP_ATOM;
2033 2034 2035
        }
    }
}
2036 2037


2038 2039 2040 2041
/* set some information in a window */
DECL_HANDLER(set_window_info)
{
    struct window *win = get_window( req->handle );
2042

2043
    if (!win) return;
2044
    if (req->flags && is_desktop_window(win) && win->thread != current)
2045 2046 2047 2048
    {
        set_error( STATUS_ACCESS_DENIED );
        return;
    }
2049 2050 2051
    if (req->extra_size > sizeof(req->extra_value) ||
        req->extra_offset < -1 ||
        req->extra_offset > win->nb_extra_bytes - (int)req->extra_size)
2052
    {
2053
        set_win32_error( ERROR_INVALID_INDEX );
2054 2055 2056 2057
        return;
    }
    if (req->extra_offset != -1)
    {
2058
        memcpy( &reply->old_extra_value, win->extra_bytes + req->extra_offset, req->extra_size );
2059
    }
2060
    else if (req->flags & SET_WIN_EXTRA)
2061
    {
2062
        set_win32_error( ERROR_INVALID_INDEX );
2063 2064
        return;
    }
2065 2066 2067 2068 2069
    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;
2070
    if (req->flags & SET_WIN_STYLE) win->style = req->style;
2071 2072 2073 2074 2075
    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);
2076
        if (!(win->ex_style & WS_EX_LAYERED)) win->is_layered = 0;
2077
    }
2078 2079
    if (req->flags & SET_WIN_ID) win->id = req->id;
    if (req->flags & SET_WIN_INSTANCE) win->instance = req->instance;
2080
    if (req->flags & SET_WIN_UNICODE) win->is_unicode = req->is_unicode;
2081
    if (req->flags & SET_WIN_USERDATA) win->user_data = req->user_data;
2082 2083
    if (req->flags & SET_WIN_EXTRA) memcpy( win->extra_bytes + req->extra_offset,
                                            &req->extra_value, req->extra_size );
2084 2085 2086

    /* changing window style triggers a non-client paint */
    if (req->flags & SET_WIN_STYLE) win->paint_flags |= PAINT_NONCLIENT;
2087 2088 2089
}


2090 2091 2092 2093 2094
/* 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;
2095
    user_handle_t *data;
2096
    data_size_t len;
2097 2098 2099

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

2100 2101 2102
    reply->count = total;
    len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
    if (len && ((data = set_reply_data_size( len ))))
2103 2104 2105 2106 2107 2108 2109 2110 2111 2112
    {
        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)
{
2113 2114
    struct window *parent = NULL;
    unsigned int total;
2115
    user_handle_t *data;
2116
    data_size_t len;
2117
    struct unicode_str cls_name;
2118
    atom_t atom = req->atom;
2119
    struct desktop *desktop = NULL;
2120

2121 2122 2123
    get_req_unicode_str( &cls_name );
    if (cls_name.len && !(atom = find_global_atom( NULL, &cls_name ))) return;

2124 2125
    if (req->desktop)
    {
2126
        if (!(desktop = get_desktop_obj( current->process, req->desktop, DESKTOP_ENUMERATE ))) return;
2127 2128
        parent = desktop->top_window;
    }
2129 2130 2131 2132 2133
    else
    {
        if (req->parent && !(parent = get_window( req->parent ))) return;
        if (!parent && !(desktop = get_thread_desktop( current, 0 ))) return;
    }
2134

2135 2136 2137 2138 2139 2140
    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 );

2141 2142 2143
    reply->count = total;
    len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
    if (len && ((data = set_reply_data_size( len ))))
2144
    {
2145 2146
        if (parent) get_children_windows( parent, atom, req->tid, data, len / sizeof(user_handle_t) );
        else
2147
        {
2148 2149 2150 2151 2152 2153 2154
            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) );
2155
        }
2156
    }
2157
    if (desktop) release_object( desktop );
2158 2159 2160
}


2161 2162 2163 2164 2165
/* 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 );
2166
    data_size_t len;
2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181

    if (!parent) return;

    array.handles = NULL;
    array.count = 0;
    array.total = 0;
    if (!all_windows_from_point( parent, req->x, req->y, &array )) return;

    reply->count = array.count;
    len = min( get_reply_max_size(), array.count * sizeof(user_handle_t) );
    if (len) set_reply_data_ptr( array.handles, len );
    else free( array.handles );
}


2182 2183 2184
/* get window tree information from a window handle */
DECL_HANDLER(get_window_tree)
{
2185
    struct window *ptr, *win = get_window( req->handle );
2186 2187 2188

    if (!win) return;

2189 2190 2191 2192 2193 2194 2195 2196 2197
    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;

2198 2199 2200
    if (win->parent)
    {
        struct window *parent = win->parent;
2201 2202
        reply->parent = parent->handle;
        reply->owner  = win->owner;
2203 2204 2205 2206 2207
        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;
        }
2208 2209 2210 2211 2212
        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;
2213
}
2214 2215


2216 2217
/* set the position and Z order of a window */
DECL_HANDLER(set_window_pos)
2218
{
2219
    rectangle_t window_rect, client_rect, visible_rect;
2220
    struct window *previous = NULL;
2221
    struct window *top, *win = get_window( req->handle );
2222
    unsigned int flags = req->swp_flags;
2223

2224 2225 2226 2227 2228
    if (!win) return;
    if (!win->parent) flags |= SWP_NOZORDER;  /* no Z order for the desktop */

    if (!(flags & SWP_NOZORDER))
    {
2229
        switch ((int)req->previous)
2230
        {
2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243
        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:
2244 2245 2246 2247 2248 2249 2250
            if (!(previous = get_window( req->previous ))) return;
            /* previous must be a sibling */
            if (previous->parent != win->parent)
            {
                set_error( STATUS_INVALID_PARAMETER );
                return;
            }
2251
            break;
2252 2253 2254 2255
        }
        if (previous == win) flags |= SWP_NOZORDER;  /* nothing to do */
    }

2256 2257 2258
    /* windows that use UpdateLayeredWindow don't trigger repaints */
    if ((win->ex_style & WS_EX_LAYERED) && !win->is_layered) flags |= SWP_NOREDRAW;

2259 2260
    /* window rectangle must be ordered properly */
    if (req->window.right < req->window.left || req->window.bottom < req->window.top)
2261 2262 2263 2264 2265
    {
        set_error( STATUS_INVALID_PARAMETER );
        return;
    }

2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276
    window_rect = visible_rect = req->window;
    client_rect = req->client;
    if (get_req_data_size() >= sizeof(rectangle_t))
        memcpy( &visible_rect, get_req_data(), sizeof(rectangle_t) );
    if (win->parent && win->parent->ex_style & WS_EX_LAYOUTRTL)
    {
        mirror_rect( &win->parent->client_rect, &window_rect );
        mirror_rect( &win->parent->client_rect, &visible_rect );
        mirror_rect( &win->parent->client_rect, &client_rect );
    }

2277
    win->paint_flags = (win->paint_flags & ~PAINT_CLIENT_FLAGS) | (req->paint_flags & PAINT_CLIENT_FLAGS);
2278
    if (win->paint_flags & PAINT_HAS_PIXEL_FORMAT) update_pixel_format_flags( win );
2279

2280 2281 2282 2283
    if (get_req_data_size() >= 3 * sizeof(rectangle_t))
    {
        rectangle_t valid_rects[2];
        memcpy( valid_rects, (const rectangle_t *)get_req_data() + 1, 2 * sizeof(rectangle_t) );
2284
        if (win->parent && win->parent->ex_style & WS_EX_LAYOUTRTL)
2285
        {
2286 2287
            mirror_rect( &win->parent->client_rect, &valid_rects[0] );
            mirror_rect( &win->parent->client_rect, &valid_rects[1] );
2288 2289 2290 2291
        }
        set_window_pos( win, previous, flags, &window_rect, &client_rect, &visible_rect, valid_rects );
    }
    else set_window_pos( win, previous, flags, &window_rect, &client_rect, &visible_rect, NULL );
2292

2293
    reply->new_style = win->style;
2294
    reply->new_ex_style = win->ex_style;
2295 2296

    top = get_top_clipping_window( win );
2297 2298
    if (is_visible( top ) &&
        (top->paint_flags & PAINT_HAS_SURFACE) &&
2299
        (top->paint_flags & (PAINT_HAS_PIXEL_FORMAT | PAINT_PIXEL_FORMAT_CHILD)))
2300
        reply->surface_win = top->handle;
2301 2302 2303 2304 2305 2306 2307 2308
}


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

2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320
    if (!win) return;

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

    switch (req->relative)
    {
    case COORDS_CLIENT:
        offset_rect( &reply->window, -win->client_rect.left, -win->client_rect.top );
        offset_rect( &reply->visible, -win->client_rect.left, -win->client_rect.top );
        offset_rect( &reply->client, -win->client_rect.left, -win->client_rect.top );
2321 2322 2323 2324 2325
        if (win->ex_style & WS_EX_LAYOUTRTL)
        {
            mirror_rect( &win->client_rect, &reply->window );
            mirror_rect( &win->client_rect, &reply->visible );
        }
2326 2327 2328 2329 2330
        break;
    case COORDS_WINDOW:
        offset_rect( &reply->window, -win->window_rect.left, -win->window_rect.top );
        offset_rect( &reply->visible, -win->window_rect.left, -win->window_rect.top );
        offset_rect( &reply->client, -win->window_rect.left, -win->window_rect.top );
2331 2332 2333 2334 2335
        if (win->ex_style & WS_EX_LAYOUTRTL)
        {
            mirror_rect( &win->window_rect, &reply->visible );
            mirror_rect( &win->window_rect, &reply->client );
        }
2336 2337
        break;
    case COORDS_PARENT:
2338 2339 2340 2341 2342 2343
        if (win->parent && win->parent->ex_style & WS_EX_LAYOUTRTL)
        {
            mirror_rect( &win->parent->client_rect, &reply->window );
            mirror_rect( &win->parent->client_rect, &reply->visible );
            mirror_rect( &win->parent->client_rect, &reply->client );
        }
2344 2345 2346 2347 2348 2349 2350 2351 2352
        break;
    case COORDS_SCREEN:
        client_to_screen_rect( win->parent, &reply->window );
        client_to_screen_rect( win->parent, &reply->visible );
        client_to_screen_rect( win->parent, &reply->client );
        break;
    default:
        set_error( STATUS_INVALID_PARAMETER );
        break;
2353 2354 2355 2356
    }
}


2357 2358 2359 2360 2361 2362 2363
/* get the window text */
DECL_HANDLER(get_window_text)
{
    struct window *win = get_window( req->handle );

    if (win && win->text)
    {
2364
        data_size_t len = strlenW( win->text ) * sizeof(WCHAR);
2365 2366
        if (len > get_reply_max_size()) len = get_reply_max_size();
        set_reply_data( win->text, len );
2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378
    }
}


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

    if (win)
    {
        WCHAR *text = NULL;
2379
        data_size_t len = get_req_data_size() / sizeof(WCHAR);
2380 2381 2382
        if (len)
        {
            if (!(text = mem_alloc( (len+1) * sizeof(WCHAR) ))) return;
2383
            memcpy( text, get_req_data(), len * sizeof(WCHAR) );
2384 2385
            text[len] = 0;
        }
2386
        free( win->text );
2387 2388 2389 2390 2391
        win->text = text;
    }
}


2392 2393 2394 2395
/* get the coordinates offset between two windows */
DECL_HANDLER(get_windows_offset)
{
    struct window *win;
2396
    int mirror_from = 0, mirror_to = 0;
2397

2398
    reply->x = reply->y = 0;
2399 2400 2401
    if (req->from)
    {
        if (!(win = get_window( req->from ))) return;
2402 2403 2404
        if (win->ex_style & WS_EX_LAYOUTRTL)
        {
            mirror_from = 1;
2405
            reply->x += win->client_rect.right - win->client_rect.left;
2406
        }
2407
        while (win && !is_desktop_window(win))
2408
        {
2409 2410
            reply->x += win->client_rect.left;
            reply->y += win->client_rect.top;
2411 2412 2413 2414 2415 2416
            win = win->parent;
        }
    }
    if (req->to)
    {
        if (!(win = get_window( req->to ))) return;
2417 2418 2419
        if (win->ex_style & WS_EX_LAYOUTRTL)
        {
            mirror_to = 1;
2420
            reply->x -= win->client_rect.right - win->client_rect.left;
2421
        }
2422
        while (win && !is_desktop_window(win))
2423
        {
2424 2425
            reply->x -= win->client_rect.left;
            reply->y -= win->client_rect.top;
2426 2427 2428
            win = win->parent;
        }
    }
2429 2430
    if (mirror_from) reply->x = -reply->x;
    reply->mirror = mirror_from ^ mirror_to;
2431 2432 2433
}


2434 2435 2436 2437
/* get the visible region of a window */
DECL_HANDLER(get_visible_region)
{
    struct region *region;
2438
    struct window *top, *win = get_window( req->window );
2439 2440 2441

    if (!win) return;

2442
    top = get_top_clipping_window( win );
2443
    if ((region = get_visible_region( win, req->flags )))
2444
    {
2445 2446 2447
        rectangle_t *data;
        map_win_region_to_screen( win, region );
        data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size );
2448
        if (data) set_reply_data_ptr( data, reply->total_size );
2449
    }
2450
    reply->top_win  = top->handle;
2451
    reply->top_rect = top->visible_rect;
2452

2453 2454 2455 2456 2457 2458 2459
    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
2460
    {
2461 2462 2463 2464
        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;
2465
    }
2466
    reply->paint_flags = win->paint_flags & PAINT_CLIENT_FLAGS;
2467 2468 2469
}


2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489
/* 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 )))
    {
        rectangle_t *data;
        if (win->parent) map_win_region_to_screen( win->parent, region );
        data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size );
        if (data) set_reply_data_ptr( data, reply->total_size );
    }
    reply->visible_rect = win->visible_rect;
    if (win->parent) client_to_screen_rect( win->parent, &reply->visible_rect );
}


2490 2491 2492
/* get the window region */
DECL_HANDLER(get_window_region)
{
2493
    rectangle_t *data;
2494 2495 2496
    struct window *win = get_window( req->window );

    if (!win) return;
2497
    if (!win->win_region) return;
2498

2499
    if (win->ex_style & WS_EX_LAYOUTRTL)
2500
    {
2501 2502 2503 2504 2505 2506 2507 2508 2509 2510
        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 );
2511
    }
2512 2513 2514
    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 );
2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529
}


/* 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;
2530
        if (win->ex_style & WS_EX_LAYOUTRTL) mirror_region( &win->window_rect, region );
2531
    }
2532
    set_window_region( win, region, req->redraw );
2533 2534 2535
}


2536 2537 2538 2539 2540
/* get a window update region */
DECL_HANDLER(get_update_region)
{
    rectangle_t *data;
    unsigned int flags = req->flags;
2541
    struct window *from_child = NULL;
2542 2543 2544
    struct window *win = get_window( req->window );

    reply->flags = 0;
2545
    if (!win) return;
2546

2547
    if (req->from_child)
2548 2549 2550
    {
        struct window *ptr;

2551
        if (!(from_child = get_window( req->from_child ))) return;
2552

2553 2554 2555 2556
        /* make sure from_child is a child of win */
        ptr = from_child;
        while (ptr && ptr != win) ptr = ptr->parent;
        if (!ptr)
2557
        {
2558 2559
            set_error( STATUS_INVALID_PARAMETER );
            return;
2560 2561 2562
        }
    }

2563 2564 2565 2566 2567 2568
    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;
    }

2569
    reply->flags = get_window_update_flags( win, from_child, flags, &win );
2570 2571 2572 2573 2574 2575
    reply->child = win->handle;

    if (flags & UPDATE_NOREGION) return;

    if (win->update_region)
    {
2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587
        /* convert update region to screen coordinates */
        struct region *region = create_empty_region();

        if (!region) return;
        if (!copy_region( region, win->update_region ))
        {
            free_region( region );
            return;
        }
        map_win_region_to_screen( win, region );
        if (!(data = get_region_data_and_free( region, get_reply_max_size(),
                                               &reply->total_size ))) return;
2588 2589 2590 2591 2592
        set_reply_data_ptr( data, reply->total_size );
    }

    if (reply->flags & (UPDATE_PAINT|UPDATE_INTERNALPAINT)) /* validate everything */
    {
2593
        validate_parents( win );
2594 2595 2596 2597 2598
        validate_whole_window( win );
    }
    else
    {
        if (reply->flags & UPDATE_NONCLIENT) validate_non_client( win );
2599 2600
        if (reply->flags & UPDATE_ERASE)
        {
2601
            win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE);
2602
            /* desktop window only gets erased, not repainted */
2603
            if (is_desktop_window(win)) validate_whole_window( win );
2604
        }
2605 2606 2607 2608
    }
}


2609 2610 2611
/* update the z order of a window so that a given rectangle is fully visible */
DECL_HANDLER(update_window_zorder)
{
2612
    rectangle_t tmp, rect = req->rect;
2613 2614 2615
    struct window *ptr, *win = get_window( req->window );

    if (!win || !win->parent || !is_visible( win )) return;  /* nothing to do */
2616 2617
    if (win->ex_style & WS_EX_LAYOUTRTL) mirror_rect( &win->client_rect, &rect );
    offset_rect( &rect, win->client_rect.left, win->client_rect.top );
2618 2619 2620 2621 2622 2623

    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;
2624
        if (ptr->is_layered && (ptr->layered_flags & LWA_COLORKEY)) continue;
2625
        if (!intersect_rect( &tmp, &ptr->visible_rect, &rect )) continue;
2626 2627 2628 2629 2630 2631
        if (ptr->win_region)
        {
            tmp = rect;
            offset_rect( &tmp, -ptr->window_rect.left, -ptr->window_rect.top );
            if (!rect_in_region( ptr->win_region, &tmp )) continue;
        }
2632
        /* found a window obscuring the rectangle, now move win above this one */
2633 2634 2635 2636 2637 2638
        /* 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 );
        }
2639 2640 2641 2642 2643
        break;
    }
}


2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658
/* mark parts of a window as needing a redraw */
DECL_HANDLER(redraw_window)
{
    struct region *region = NULL;
    struct window *win = get_window( req->window );

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

    if (req->flags & (RDW_VALIDATE|RDW_INVALIDATE))
    {
        if (get_req_data_size())  /* no data means whole rectangle */
        {
            if (!(region = create_region_from_req_data( get_req_data(), get_req_data_size() )))
                return;
2659
            if (win->ex_style & WS_EX_LAYOUTRTL) mirror_region( &win->client_rect, region );
2660 2661 2662 2663 2664 2665 2666 2667 2668
        }
    }

    redraw_window( win, region, (req->flags & RDW_INVALIDATE) && (req->flags & RDW_FRAME),
                   req->flags );
    if (region) free_region( region );
}


2669 2670 2671
/* set a window property */
DECL_HANDLER(set_window_property)
{
2672
    struct unicode_str name;
2673 2674
    struct window *win = get_window( req->window );

2675 2676
    if (!win) return;

2677 2678
    get_req_unicode_str( &name );
    if (name.len)
2679
    {
2680
        atom_t atom = add_global_atom( NULL, &name );
2681 2682
        if (atom)
        {
2683
            set_property( win, atom, req->data, PROP_TYPE_STRING );
2684
            release_global_atom( NULL, atom );
2685 2686
        }
    }
2687
    else set_property( win, req->atom, req->data, PROP_TYPE_ATOM );
2688 2689 2690 2691 2692 2693
}


/* remove a window property */
DECL_HANDLER(remove_window_property)
{
2694
    struct unicode_str name;
2695
    struct window *win = get_window( req->window );
2696

2697
    get_req_unicode_str( &name );
2698
    if (win)
2699
    {
2700
        atom_t atom = name.len ? find_global_atom( NULL, &name ) : req->atom;
2701
        if (atom) reply->data = remove_property( win, atom );
2702
    }
2703 2704 2705 2706 2707 2708
}


/* get a window property */
DECL_HANDLER(get_window_property)
{
2709
    struct unicode_str name;
2710
    struct window *win = get_window( req->window );
2711

2712
    get_req_unicode_str( &name );
2713
    if (win)
2714
    {
2715
        atom_t atom = name.len ? find_global_atom( NULL, &name ) : req->atom;
2716
        if (atom) reply->data = get_property( win, atom );
2717
    }
2718 2719 2720 2721 2722 2723
}


/* get the list of properties of a window */
DECL_HANDLER(get_window_properties)
{
2724 2725
    property_data_t *data;
    int i, count, max = get_reply_max_size() / sizeof(*data);
2726 2727
    struct window *win = get_window( req->window );

2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742
    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);
2743
        data->data   = win->properties[i].data;
2744 2745 2746
        data++;
        count--;
    }
2747
}
2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758


/* 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;
    }
2759 2760 2761 2762 2763
    else if (*win)
    {
        set_error( STATUS_ACCESS_DENIED );
        return 0;
    }
2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798
    *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;
}
2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825

/* 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)
    {
2826 2827
        int was_layered = win->is_layered;

2828 2829 2830 2831 2832 2833
        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;
2834 2835
        /* repaint since we know now it's not going to use UpdateLayeredWindow */
        if (!was_layered) redraw_window( win, 0, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME );
2836 2837 2838
    }
    else set_win32_error( ERROR_INVALID_WINDOW_HANDLE );
}