window.c 81 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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#define PAINT_INTERNAL      0x01  /* internal WM_PAINT pending */
#define PAINT_ERASE         0x02  /* needs WM_ERASEBKGND */
#define PAINT_NONCLIENT     0x04  /* needs WM_NCPAINT */
#define PAINT_DELAYED_ERASE 0x08  /* still needs erase after WM_ERASEBKGND */
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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;
}

/* link a window at the right place in the siblings list */
static void link_window( struct window *win, struct window *previous )
{
    if (previous == WINPTR_NOTOPMOST)
    {
        if (!(win->ex_style & WS_EX_TOPMOST) && win->is_linked) return;  /* nothing to do */
        win->ex_style &= ~WS_EX_TOPMOST;
        previous = WINPTR_TOP;  /* fallback to the HWND_TOP case */
    }

    list_remove( &win->entry );  /* unlink it from the previous location */

    if (previous == WINPTR_BOTTOM)
    {
        list_add_tail( &win->parent->children, &win->entry );
        win->ex_style &= ~WS_EX_TOPMOST;
    }
    else if (previous == WINPTR_TOPMOST)
    {
        list_add_head( &win->parent->children, &win->entry );
        win->ex_style |= WS_EX_TOPMOST;
    }
    else if (previous == WINPTR_TOP)
    {
        struct list *entry = win->parent->children.next;
        if (!(win->ex_style & WS_EX_TOPMOST))  /* put it above the first non-topmost window */
        {
            while (entry != &win->parent->children &&
                   LIST_ENTRY( entry, struct window, entry )->ex_style & WS_EX_TOPMOST)
                entry = entry->next;
        }
        list_add_before( entry, &win->entry );
    }
    else
    {
        list_add_after( &previous->entry, &win->entry );
        if (!(previous->ex_style & WS_EX_TOPMOST)) win->ex_style &= ~WS_EX_TOPMOST;
        else
        {
            struct window *next = get_next_window( win );
            if (next && (next->ex_style & WS_EX_TOPMOST)) win->ex_style |= WS_EX_TOPMOST;
        }
    }

    win->is_linked = 1;
}

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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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    }
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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;
}

/* attempt to close the desktop window when the last process using it is gone */
void close_desktop_window( struct desktop *desktop )
{
    struct window *win = desktop->top_window;
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    if (win && win->thread) post_message( win->handle, WM_CLOSE, 0, 0 );
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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 whether window is a top-level window */
int is_top_level_window( user_handle_t window )
{
    struct window *win = get_user_object( window, USER_WINDOW );
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    return (win && (is_desktop_window(win) || is_desktop_window(win->parent)));
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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;

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

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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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/* 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 )
{
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    struct window *ptr;
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    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
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    {
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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;
}

685
/* find window containing point (in absolute coords) */
686
user_handle_t window_from_point( struct desktop *desktop, int x, int y )
687
{
688
    struct window *ret;
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    if (!desktop->top_window) return 0;
    ret = child_window_from_point( desktop->top_window, x, y );
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    return ret->handle;
}
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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 );
}
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/* 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;

748
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
749 750
    {
        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;
}


773
/* find a window that needs to receive a WM_PAINT; also clear its internal paint flag */
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user_handle_t find_window_to_repaint( user_handle_t parent, struct thread *thread )
{
776
    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 );

783
    if (win && parent)
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    {
        /* check that it is a child of the specified parent */
        for (ptr = win; ptr; ptr = ptr->parent)
787
            if (ptr->handle == parent) break;
788
        /* otherwise don't return any window, we don't repaint a child before its parent */
789
        if (!ptr) win = NULL;
790
    }
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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 )
{
834 835 836 837 838 839 840
    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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}


844 845 846 847 848 849 850 851
/* 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;
852
    LIST_FOR_EACH_ENTRY( ptr, &parent->children, struct window, entry )
853
    {
854
        if (ptr == last) break;
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        if (!(ptr->style & WS_VISIBLE)) continue;
        if (ptr->ex_style & WS_EX_TRANSPARENT) continue;
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        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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/* compute the intersection of two rectangles; return 0 if the result is empty */
static inline int intersect_rect( rectangle_t *dst, const rectangle_t *src1, const rectangle_t *src2 )
{
    dst->left   = max( src1->left, src2->left );
    dst->top    = max( src1->top, src2->top );
    dst->right  = min( src1->right, src2->right );
    dst->bottom = min( src1->bottom, src2->bottom );
    return (dst->left < dst->right && dst->top < dst->bottom);
}


883 884 885 886 887 888 889 890 891 892
/* 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;
}


893 894 895 896 897
/* 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;

898
    intersect_rect( &rect, &win->window_rect, &win->client_rect );
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    set_region_rect( region, &rect );
}


903 904 905
/* get the top-level window to clip against for a given window */
static inline struct window *get_top_clipping_window( struct window *win )
{
906
    while (win->parent && !is_desktop_window(win->parent)) win = win->parent;
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    return win;
}


911
/* compute the visible region of a window, in window coordinates */
912
static struct region *get_visible_region( struct window *win, unsigned int flags )
913
{
914
    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 */

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    if (!is_visible( win )) return region;  /* empty region */
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    /* create a region relative to the window itself */
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925
    if ((flags & DCX_PARENTCLIP) && win->parent && !is_desktop_window(win->parent))
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    {
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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)
    {
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        set_region_rect( region, &win->visible_rect );
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        if (win->win_region && !intersect_window_region( region, win )) goto error;
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    }
    else
    {
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        set_region_client_rect( region, win );
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        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;
    }

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    if ((tmp = create_empty_region()) != NULL)
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    {
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        while (win->parent)
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        {
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            /* 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 ))
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            {
                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;
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            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 );
            }
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            set_region_client_rect( tmp, win );
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            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 );
    }
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    offset_region( region, -offset_x, -offset_y );  /* make it relative to target window */
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    return region;

error:
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    if (tmp) free_region( tmp );
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    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;
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    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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        /* 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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1060 1061 1062 1063
        /* 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;
1112
    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 );
    }
}


1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
/* 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;

1161
    if ((tmp = create_empty_region()))
1162
    {
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        set_region_rect( tmp, &rect );
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        if (intersect_region( tmp, win->update_region, tmp ))
            set_update_region( win, tmp );
        else
            free_region( tmp );
    }
    win->paint_flags &= ~PAINT_NONCLIENT;
}


/* validate a window completely so that we don't get any further paint messages for it */
static void validate_whole_window( struct window *win )
{
    set_update_region( win, NULL );

    if (win->paint_flags & PAINT_INTERNAL)
    {
        win->paint_flags &= ~PAINT_INTERNAL;
        inc_window_paint_count( win, -1 );
    }
}


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/* validate a window's children so that we don't get any further paint messages for it */
static void validate_children( struct window *win )
{
    struct window *child;

    LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry )
    {
        if (!(child->style & WS_VISIBLE)) continue;
        validate_children(child);
        validate_whole_window(child);
    }
}


1200
/* validate the update region of a window on all parents; helper for get_update_region */
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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;

1209
    while (win->parent)
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    {
        /* map to parent client coords */
        offset_x += win->window_rect.left;
        offset_y += win->window_rect.top;

        win = win->parent;

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

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


/* add/subtract a region (in client coordinates) to the update region of the window */
static void redraw_window( struct window *win, struct region *region, int frame, unsigned int flags )
{
    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 );
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            if (flags & RDW_NOERASE) win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE);
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        }
    }

    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;

1300
    LIST_FOR_EACH_ENTRY( child, &win->children, struct window, entry )
1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326
    {
        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)
    {
1327 1328 1329 1330 1331
        if (win->update_region)
        {
            if (win->paint_flags & PAINT_DELAYED_ERASE) ret |= UPDATE_DELAYED_ERASE;
            ret |= UPDATE_PAINT;
        }
1332 1333 1334
    }
    if (flags & UPDATE_INTERNALPAINT)
    {
1335 1336 1337 1338 1339
        if (win->paint_flags & PAINT_INTERNAL)
        {
            ret |= UPDATE_INTERNALPAINT;
            if (win->paint_flags & PAINT_DELAYED_ERASE) ret |= UPDATE_DELAYED_ERASE;
        }
1340 1341 1342 1343 1344 1345
    }
    return ret;
}


/* iterate through the children of the given window until we find one with some update flags */
1346 1347
static unsigned int get_child_update_flags( struct window *win, struct window *from_child,
                                            unsigned int flags, struct window **child )
1348 1349 1350 1351
{
    struct window *ptr;
    unsigned int ret = 0;

1352 1353 1354 1355 1356 1357 1358 1359 1360 1361
    /* 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;

1362
    LIST_FOR_EACH_ENTRY( ptr, &win->children, struct window, entry )
1363
    {
1364 1365 1366 1367 1368
        if (from_child)  /* skip all children until from_child is found */
        {
            if (ptr == from_child) from_child = NULL;
            continue;
        }
1369 1370 1371 1372 1373 1374
        if (!(ptr->style & WS_VISIBLE)) continue;
        if ((ret = get_update_flags( ptr, flags )) != 0)
        {
            *child = ptr;
            break;
        }
1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389
        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;
1390
    for (ptr = from_child; ptr; ptr = ptr->parent)
1391 1392 1393 1394 1395 1396 1397 1398 1399 1400
    {
        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)))
    {
1401
        for (ptr = win->parent; ptr; ptr = ptr->parent)
1402
        {
1403 1404 1405 1406 1407
            if (!(ptr->style & WS_CLIPCHILDREN) && win_needs_repaint( ptr ))
                return 0;
        }
        if (from_child && !(flags & UPDATE_ALLCHILDREN))
        {
1408
            for (ptr = from_sibling ? from_sibling : from_child; ptr; ptr = ptr->parent)
1409 1410 1411 1412
            {
                if (!(ptr->style & WS_CLIPCHILDREN) && win_needs_repaint( ptr )) from_sibling = ptr;
                if (ptr == win) break;
            }
1413
        }
1414
    }
1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446


    /* 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;
1447 1448 1449
}


1450 1451 1452 1453
/* 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 )
1454
{
1455
    struct region *new_vis_rgn, *exposed_rgn;
1456

1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473
    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;
        }
    }

1474
    if (win->parent)
1475
    {
1476 1477 1478 1479 1480 1481 1482 1483 1484 1485
        /* 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 ))
            {
1486 1487
                /* make it relative to parent */
                offset_region( new_vis_rgn, old_window_rect->left, old_window_rect->top );
1488 1489 1490
                redraw_window( win->parent, new_vis_rgn, 0, RDW_INVALIDATE | RDW_ERASE | RDW_ALLCHILDREN );
            }
        }
1491
    }
1492 1493
    free_region( new_vis_rgn );
    return exposed_rgn;
1494 1495 1496 1497
}


/* set the window and client rectangles, updating the update region if necessary */
1498
static void set_window_pos( struct window *win, struct window *previous,
1499
                            unsigned int swp_flags, const rectangle_t *window_rect,
1500 1501
                            const rectangle_t *client_rect, const rectangle_t *visible_rect,
                            const rectangle_t *valid_rects )
1502
{
1503
    struct region *old_vis_rgn = NULL, *exposed_rgn = NULL;
1504
    const rectangle_t old_window_rect = win->window_rect;
1505
    const rectangle_t old_visible_rect = win->visible_rect;
1506
    const rectangle_t old_client_rect = win->client_rect;
1507
    rectangle_t rect;
1508
    int client_changed, frame_changed;
1509
    int visible = (win->style & WS_VISIBLE) || (swp_flags & SWP_SHOWWINDOW);
1510

1511
    if (win->parent && !is_visible( win->parent )) visible = 0;
1512

1513
    if (visible && !(old_vis_rgn = get_visible_region( win, DCX_WINDOW ))) return;
1514 1515 1516

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

1517
    win->window_rect  = *window_rect;
1518
    win->visible_rect = *visible_rect;
1519
    win->client_rect  = *client_rect;
1520
    if (!(swp_flags & SWP_NOZORDER) && win->parent) link_window( win, previous );
1521 1522 1523
    if (swp_flags & SWP_SHOWWINDOW) win->style |= WS_VISIBLE;
    else if (swp_flags & SWP_HIDEWINDOW) win->style &= ~WS_VISIBLE;

1524 1525 1526
    /* if the window is not visible, everything is easy */
    if (!visible) return;

1527 1528
    /* expose anything revealed by the change */

1529
    if (!(swp_flags & SWP_NOREDRAW))
1530
        exposed_rgn = expose_window( win, &old_window_rect, old_vis_rgn );
1531 1532 1533 1534 1535

    if (!(win->style & WS_VISIBLE))
    {
        /* clear the update region since the window is no longer visible */
        validate_whole_window( win );
1536
        validate_children( win );
1537 1538 1539
        goto done;
    }

1540 1541
    /* crop update region to the new window rect */

1542
    if (win->update_region)
1543
    {
1544
        if (get_window_visible_rect( win, &rect, 1 ))
1545
        {
1546 1547 1548 1549 1550 1551 1552 1553 1554
            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 );
            }
1555
        }
1556
        else set_update_region( win, NULL ); /* visible rect is empty */
1557 1558
    }

1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569
    /* 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 );

1570 1571
    if (swp_flags & SWP_NOREDRAW) goto done;  /* do not repaint anything */

1572 1573
    /* expose the whole non-client area if it changed in any way */

1574 1575 1576
    if (swp_flags & SWP_NOCOPYBITS)
    {
        frame_changed = ((swp_flags & SWP_FRAMECHANGED) ||
1577 1578
                         memcmp( window_rect, &old_window_rect, sizeof(old_window_rect) ) ||
                         memcmp( visible_rect, &old_visible_rect, sizeof(old_visible_rect) ));
1579 1580 1581 1582 1583 1584 1585 1586 1587
        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 ||
1588 1589 1590 1591 1592
                         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);
1593 1594 1595
        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 ||
1596 1597 1598
                          client_rect->bottom - old_client_rect.bottom != y_offset ||
                          !valid_rects ||
                          memcmp( &valid_rects[0], client_rect, sizeof(*client_rect) ));
1599 1600 1601
    }

    if (frame_changed || client_changed)
1602
    {
1603
        struct region *win_rgn = old_vis_rgn;  /* reuse previous region */
1604

1605 1606
        set_region_rect( win_rgn, window_rect );
        if (valid_rects)
1607
        {
1608
            /* subtract the valid portion of client rect from the total region */
1609 1610
            struct region *tmp = create_empty_region();
            if (tmp)
1611
            {
1612 1613 1614
                set_region_rect( tmp, &valid_rects[0] );
                if (subtract_region( tmp, win_rgn, tmp )) win_rgn = tmp;
                else free_region( tmp );
1615 1616
            }
        }
1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628
        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;
        }
1629 1630
    }

1631 1632 1633
    if (exposed_rgn)
        redraw_window( win, exposed_rgn, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN );

1634
done:
1635
    if (old_vis_rgn) free_region( old_vis_rgn );
1636
    if (exposed_rgn) free_region( exposed_rgn );
1637 1638 1639
    clear_error();  /* we ignore out of memory errors once the new rects have been set */
}

1640

1641 1642 1643
/* set the window region, updating the update region if necessary */
static void set_window_region( struct window *win, struct region *region, int redraw )
{
1644
    struct region *old_vis_rgn = NULL, *exposed_rgn;
1645 1646 1647 1648

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

1649
    if (redraw) old_vis_rgn = get_visible_region( win, DCX_WINDOW );
1650 1651 1652 1653

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

1654 1655
    /* expose anything revealed by the change */
    if (old_vis_rgn && ((exposed_rgn = expose_window( win, &win->window_rect, old_vis_rgn ))))
1656
    {
1657 1658
        redraw_window( win, exposed_rgn, 1, RDW_INVALIDATE | RDW_ERASE | RDW_FRAME | RDW_ALLCHILDREN );
        free_region( exposed_rgn );
1659 1660 1661 1662 1663 1664 1665
    }

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


1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714
/* destroy a window */
void destroy_window( struct window *win )
{
    /* hide the window */
    if (is_visible(win))
    {
        struct region *vis_rgn = get_visible_region( win, DCX_WINDOW );
        win->style &= ~WS_VISIBLE;
        if (vis_rgn)
        {
            struct region *exposed_rgn = expose_window( win, &win->window_rect, vis_rgn );
            if (exposed_rgn) free_region( exposed_rgn );
            free_region( vis_rgn );
        }
        validate_whole_window( win );
        validate_children( win );
    }

    /* destroy all children */
    while (!list_empty(&win->children))
        destroy_window( LIST_ENTRY( list_head(&win->children), struct window, entry ));
    while (!list_empty(&win->unlinked))
        destroy_window( LIST_ENTRY( list_head(&win->unlinked), struct window, entry ));

    /* reset global window pointers, if the corresponding window is destroyed */
    if (win == shell_window) shell_window = NULL;
    if (win == shell_listview) shell_listview = NULL;
    if (win == progman_window) progman_window = NULL;
    if (win == taskman_window) taskman_window = NULL;
    free_user_handle( win->handle );
    destroy_properties( win );
    list_remove( &win->entry );
    if (is_desktop_window(win))
    {
        struct desktop *desktop = win->desktop;
        assert( desktop->top_window == win || desktop->msg_window == win );
        if (desktop->top_window == win) desktop->top_window = NULL;
        else desktop->msg_window = NULL;
    }
    detach_window_thread( win );
    if (win->win_region) free_region( win->win_region );
    if (win->update_region) free_region( win->update_region );
    if (win->class) release_class( win->class );
    free( win->text );
    memset( win, 0x55, sizeof(*win) + win->nb_extra_bytes - 1 );
    free( win );
}


1715 1716
/* create a window */
DECL_HANDLER(create_window)
1717
{
1718
    struct window *win, *parent = NULL, *owner = NULL;
1719
    struct unicode_str cls_name;
1720
    atom_t atom;
1721

1722
    reply->handle = 0;
1723
    if (req->parent && !(parent = get_window( req->parent ))) return;
1724

1725 1726 1727 1728
    if (req->owner)
    {
        if (!(owner = get_window( req->owner ))) return;
        if (is_desktop_window(owner)) owner = NULL;
1729
        else if (parent && !is_desktop_window(parent))
1730
        {
1731
            /* an owned window must be created as top-level */
1732 1733 1734
            set_error( STATUS_ACCESS_DENIED );
            return;
        }
1735 1736
        else /* owner must be a top-level window */
            while (!is_desktop_window(owner->parent)) owner = owner->parent;
1737
    }
1738

1739 1740
    get_req_unicode_str( &cls_name );
    atom = cls_name.len ? find_global_atom( NULL, &cls_name ) : req->atom;
1741 1742

    if (!(win = create_window( parent, owner, atom, req->instance ))) return;
1743

1744
    reply->handle    = win->handle;
1745 1746
    reply->parent    = win->parent ? win->parent->handle : 0;
    reply->owner     = win->owner;
1747 1748
    reply->extra     = win->nb_extra_bytes;
    reply->class_ptr = get_class_client_ptr( win->class );
1749 1750 1751
}


1752 1753
/* set the parent of a window */
DECL_HANDLER(set_parent)
1754
{
1755
    struct window *win, *parent = NULL;
1756

1757 1758
    if (!(win = get_window( req->handle ))) return;
    if (req->parent && !(parent = get_window( req->parent ))) return;
1759

1760
    if (is_desktop_window(win))
1761 1762 1763 1764
    {
        set_error( STATUS_INVALID_PARAMETER );
        return;
    }
1765
    reply->old_parent  = win->parent->handle;
1766
    reply->full_parent = parent ? parent->handle : 0;
1767
    set_parent_window( win, parent );
1768 1769 1770 1771 1772 1773
}


/* destroy a window */
DECL_HANDLER(destroy_window)
{
1774
    struct window *win = get_window( req->handle );
1775 1776
    if (win)
    {
1777
        if (!is_desktop_window(win)) destroy_window( win );
1778
        else if (win->thread == current) detach_window_thread( win );
1779 1780 1781 1782 1783
        else set_error( STATUS_ACCESS_DENIED );
    }
}


1784 1785 1786
/* retrieve the desktop window for the current thread */
DECL_HANDLER(get_desktop_window)
{
1787
    struct desktop *desktop = get_thread_desktop( current, 0 );
1788

1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814
    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 );
1815 1816 1817
}


1818 1819 1820 1821
/* set a window owner */
DECL_HANDLER(set_window_owner)
{
    struct window *win = get_window( req->handle );
1822
    struct window *owner = NULL;
1823

1824 1825
    if (!win) return;
    if (req->owner && !(owner = get_window( req->owner ))) return;
1826
    if (is_desktop_window(win))
1827 1828 1829 1830
    {
        set_error( STATUS_ACCESS_DENIED );
        return;
    }
1831 1832
    reply->prev_owner = win->owner;
    reply->full_owner = win->owner = owner ? owner->handle : 0;
1833 1834 1835
}


1836
/* get information from a window handle */
1837 1838
DECL_HANDLER(get_window_info)
{
1839
    struct window *win = get_window( req->handle );
1840

1841 1842
    reply->full_handle = 0;
    reply->tid = reply->pid = 0;
1843 1844
    if (win)
    {
1845
        reply->full_handle = win->handle;
1846
        reply->last_active = win->handle;
1847
        reply->is_unicode  = win->is_unicode;
1848
        if (get_user_object( win->last_active, USER_WINDOW )) reply->last_active = win->last_active;
1849 1850
        if (win->thread)
        {
1851 1852
            reply->tid  = get_thread_id( win->thread );
            reply->pid  = get_process_id( win->thread->process );
1853
            reply->atom = win->class ? get_class_atom( win->class ) : DESKTOP_ATOM;
1854 1855 1856
        }
    }
}
1857 1858


1859 1860 1861 1862
/* set some information in a window */
DECL_HANDLER(set_window_info)
{
    struct window *win = get_window( req->handle );
1863

1864
    if (!win) return;
1865
    if (req->flags && is_desktop_window(win) && win->thread != current)
1866 1867 1868 1869
    {
        set_error( STATUS_ACCESS_DENIED );
        return;
    }
1870 1871 1872
    if (req->extra_size > sizeof(req->extra_value) ||
        req->extra_offset < -1 ||
        req->extra_offset > win->nb_extra_bytes - (int)req->extra_size)
1873
    {
1874
        set_win32_error( ERROR_INVALID_INDEX );
1875 1876 1877 1878
        return;
    }
    if (req->extra_offset != -1)
    {
1879
        memcpy( &reply->old_extra_value, win->extra_bytes + req->extra_offset, req->extra_size );
1880
    }
1881
    else if (req->flags & SET_WIN_EXTRA)
1882
    {
1883
        set_win32_error( ERROR_INVALID_INDEX );
1884 1885
        return;
    }
1886 1887 1888 1889 1890
    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;
1891
    if (req->flags & SET_WIN_STYLE) win->style = req->style;
1892 1893 1894 1895 1896
    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);
1897
        if (!(win->ex_style & WS_EX_LAYERED)) win->is_layered = 0;
1898
    }
1899 1900
    if (req->flags & SET_WIN_ID) win->id = req->id;
    if (req->flags & SET_WIN_INSTANCE) win->instance = req->instance;
1901
    if (req->flags & SET_WIN_UNICODE) win->is_unicode = req->is_unicode;
1902
    if (req->flags & SET_WIN_USERDATA) win->user_data = req->user_data;
1903 1904
    if (req->flags & SET_WIN_EXTRA) memcpy( win->extra_bytes + req->extra_offset,
                                            &req->extra_value, req->extra_size );
1905 1906 1907

    /* changing window style triggers a non-client paint */
    if (req->flags & SET_WIN_STYLE) win->paint_flags |= PAINT_NONCLIENT;
1908 1909 1910
}


1911 1912 1913 1914 1915
/* 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;
1916
    user_handle_t *data;
1917
    data_size_t len;
1918 1919 1920

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

1921 1922 1923
    reply->count = total;
    len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
    if (len && ((data = set_reply_data_size( len ))))
1924 1925 1926 1927 1928 1929 1930 1931 1932 1933
    {
        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)
{
1934 1935
    struct window *parent = NULL;
    unsigned int total;
1936
    user_handle_t *data;
1937
    data_size_t len;
1938
    struct unicode_str cls_name;
1939
    atom_t atom = req->atom;
1940
    struct desktop *desktop = NULL;
1941

1942 1943 1944
    get_req_unicode_str( &cls_name );
    if (cls_name.len && !(atom = find_global_atom( NULL, &cls_name ))) return;

1945 1946
    if (req->desktop)
    {
1947
        if (!(desktop = get_desktop_obj( current->process, req->desktop, DESKTOP_ENUMERATE ))) return;
1948 1949
        parent = desktop->top_window;
    }
1950 1951 1952 1953 1954
    else
    {
        if (req->parent && !(parent = get_window( req->parent ))) return;
        if (!parent && !(desktop = get_thread_desktop( current, 0 ))) return;
    }
1955

1956 1957 1958 1959 1960 1961
    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 );

1962 1963 1964
    reply->count = total;
    len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
    if (len && ((data = set_reply_data_size( len ))))
1965
    {
1966 1967
        if (parent) get_children_windows( parent, atom, req->tid, data, len / sizeof(user_handle_t) );
        else
1968
        {
1969 1970 1971 1972 1973 1974 1975
            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) );
1976
        }
1977
    }
1978
    if (desktop) release_object( desktop );
1979 1980 1981
}


1982 1983 1984 1985 1986
/* 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 );
1987
    data_size_t len;
1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002

    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 );
}


2003 2004 2005
/* get window tree information from a window handle */
DECL_HANDLER(get_window_tree)
{
2006
    struct window *ptr, *win = get_window( req->handle );
2007 2008 2009

    if (!win) return;

2010 2011 2012 2013 2014 2015 2016 2017 2018
    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;

2019 2020 2021
    if (win->parent)
    {
        struct window *parent = win->parent;
2022 2023
        reply->parent = parent->handle;
        reply->owner  = win->owner;
2024 2025 2026 2027 2028
        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;
        }
2029 2030 2031 2032 2033
        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;
2034
}
2035 2036


2037 2038
/* set the position and Z order of a window */
DECL_HANDLER(set_window_pos)
2039
{
2040
    const rectangle_t *visible_rect = NULL, *valid_rects = NULL;
2041
    struct window *previous = NULL;
2042
    struct window *win = get_window( req->handle );
2043
    unsigned int flags = req->flags;
2044

2045 2046 2047 2048 2049
    if (!win) return;
    if (!win->parent) flags |= SWP_NOZORDER;  /* no Z order for the desktop */

    if (!(flags & SWP_NOZORDER))
    {
2050
        switch ((int)req->previous)
2051
        {
2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064
        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:
2065 2066 2067 2068 2069 2070 2071
            if (!(previous = get_window( req->previous ))) return;
            /* previous must be a sibling */
            if (previous->parent != win->parent)
            {
                set_error( STATUS_INVALID_PARAMETER );
                return;
            }
2072
            break;
2073 2074 2075 2076
        }
        if (previous == win) flags |= SWP_NOZORDER;  /* nothing to do */
    }

2077 2078
    /* window rectangle must be ordered properly */
    if (req->window.right < req->window.left || req->window.bottom < req->window.top)
2079 2080 2081 2082 2083
    {
        set_error( STATUS_INVALID_PARAMETER );
        return;
    }

2084 2085 2086 2087 2088
    if (get_req_data_size() >= sizeof(rectangle_t)) visible_rect = get_req_data();
    if (get_req_data_size() >= 3 * sizeof(rectangle_t)) valid_rects = visible_rect + 1;

    if (!visible_rect) visible_rect = &req->window;
    set_window_pos( win, previous, flags, &req->window, &req->client, visible_rect, valid_rects );
2089
    reply->new_style = win->style;
2090
    reply->new_ex_style = win->ex_style;
2091 2092 2093 2094 2095 2096 2097 2098 2099 2100
}


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

    if (win)
    {
2101 2102 2103
        reply->window  = win->window_rect;
        reply->visible = win->visible_rect;
        reply->client  = win->client_rect;
2104 2105 2106 2107
    }
}


2108 2109 2110 2111 2112 2113 2114
/* get the window text */
DECL_HANDLER(get_window_text)
{
    struct window *win = get_window( req->handle );

    if (win && win->text)
    {
2115
        data_size_t len = strlenW( win->text ) * sizeof(WCHAR);
2116 2117
        if (len > get_reply_max_size()) len = get_reply_max_size();
        set_reply_data( win->text, len );
2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129
    }
}


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

    if (win)
    {
        WCHAR *text = NULL;
2130
        data_size_t len = get_req_data_size() / sizeof(WCHAR);
2131 2132 2133
        if (len)
        {
            if (!(text = mem_alloc( (len+1) * sizeof(WCHAR) ))) return;
2134
            memcpy( text, get_req_data(), len * sizeof(WCHAR) );
2135 2136
            text[len] = 0;
        }
2137
        free( win->text );
2138 2139 2140 2141 2142
        win->text = text;
    }
}


2143 2144 2145 2146 2147
/* get the coordinates offset between two windows */
DECL_HANDLER(get_windows_offset)
{
    struct window *win;

2148
    reply->x = reply->y = 0;
2149 2150 2151
    if (req->from)
    {
        if (!(win = get_window( req->from ))) return;
2152
        while (win && !is_desktop_window(win))
2153
        {
2154 2155
            reply->x += win->client_rect.left;
            reply->y += win->client_rect.top;
2156 2157 2158 2159 2160 2161
            win = win->parent;
        }
    }
    if (req->to)
    {
        if (!(win = get_window( req->to ))) return;
2162
        while (win && !is_desktop_window(win))
2163
        {
2164 2165
            reply->x -= win->client_rect.left;
            reply->y -= win->client_rect.top;
2166 2167 2168 2169 2170 2171
            win = win->parent;
        }
    }
}


2172 2173 2174 2175
/* get the visible region of a window */
DECL_HANDLER(get_visible_region)
{
    struct region *region;
2176
    struct window *top, *win = get_window( req->window );
2177 2178 2179

    if (!win) return;

2180
    top = get_top_clipping_window( win );
2181
    if ((region = get_visible_region( win, req->flags )))
2182
    {
2183 2184 2185
        rectangle_t *data;
        map_win_region_to_screen( win, region );
        data = get_region_data_and_free( region, get_reply_max_size(), &reply->total_size );
2186
        if (data) set_reply_data_ptr( data, reply->total_size );
2187
    }
2188
    reply->top_win  = top->handle;
2189
    reply->top_rect = (top == win && (req->flags & DCX_WINDOW)) ? top->visible_rect : top->client_rect;
2190

2191 2192 2193 2194 2195 2196 2197
    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
2198
    {
2199 2200 2201 2202
        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;
2203
    }
2204 2205 2206
}


2207 2208 2209 2210 2211 2212 2213 2214 2215
/* get the window region */
DECL_HANDLER(get_window_region)
{
    struct window *win = get_window( req->window );

    if (!win) return;

    if (win->win_region)
    {
2216 2217
        rectangle_t *data = get_region_data( win->win_region, get_reply_max_size(), &reply->total_size );
        if (data) set_reply_data_ptr( data, reply->total_size );
2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234
    }
}


/* 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;
    }
2235
    set_window_region( win, region, req->redraw );
2236 2237 2238
}


2239 2240 2241 2242 2243
/* get a window update region */
DECL_HANDLER(get_update_region)
{
    rectangle_t *data;
    unsigned int flags = req->flags;
2244
    struct window *from_child = NULL;
2245 2246 2247
    struct window *win = get_window( req->window );

    reply->flags = 0;
2248
    if (!win) return;
2249

2250
    if (req->from_child)
2251 2252 2253
    {
        struct window *ptr;

2254
        if (!(from_child = get_window( req->from_child ))) return;
2255

2256 2257 2258 2259
        /* make sure from_child is a child of win */
        ptr = from_child;
        while (ptr && ptr != win) ptr = ptr->parent;
        if (!ptr)
2260
        {
2261 2262
            set_error( STATUS_INVALID_PARAMETER );
            return;
2263 2264 2265
        }
    }

2266 2267 2268 2269 2270 2271
    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;
    }

2272
    reply->flags = get_window_update_flags( win, from_child, flags, &win );
2273 2274 2275 2276 2277 2278
    reply->child = win->handle;

    if (flags & UPDATE_NOREGION) return;

    if (win->update_region)
    {
2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290
        /* 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;
2291 2292 2293 2294 2295
        set_reply_data_ptr( data, reply->total_size );
    }

    if (reply->flags & (UPDATE_PAINT|UPDATE_INTERNALPAINT)) /* validate everything */
    {
2296
        validate_parents( win );
2297 2298 2299 2300 2301
        validate_whole_window( win );
    }
    else
    {
        if (reply->flags & UPDATE_NONCLIENT) validate_non_client( win );
2302 2303
        if (reply->flags & UPDATE_ERASE)
        {
2304
            win->paint_flags &= ~(PAINT_ERASE | PAINT_DELAYED_ERASE);
2305
            /* desktop window only gets erased, not repainted */
2306
            if (is_desktop_window(win)) validate_whole_window( win );
2307
        }
2308 2309 2310 2311
    }
}


2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327
/* update the z order of a window so that a given rectangle is fully visible */
DECL_HANDLER(update_window_zorder)
{
    rectangle_t tmp;
    struct window *ptr, *win = get_window( req->window );

    if (!win || !win->parent || !is_visible( win )) return;  /* nothing to do */

    LIST_FOR_EACH_ENTRY( ptr, &win->parent->children, struct window, entry )
    {
        if (ptr == win) break;
        if (!(ptr->style & WS_VISIBLE)) continue;
        if (ptr->ex_style & WS_EX_TRANSPARENT) continue;
        if (!intersect_rect( &tmp, &ptr->visible_rect, &req->rect )) continue;
        if (ptr->win_region && !rect_in_region( ptr->win_region, &req->rect )) continue;
        /* found a window obscuring the rectangle, now move win above this one */
2328 2329 2330 2331 2332 2333
        /* 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 );
        }
2334 2335 2336 2337 2338
        break;
    }
}


2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362
/* mark parts of a window as needing a redraw */
DECL_HANDLER(redraw_window)
{
    struct region *region = NULL;
    struct window *win = get_window( req->window );

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

    if (req->flags & (RDW_VALIDATE|RDW_INVALIDATE))
    {
        if (get_req_data_size())  /* no data means whole rectangle */
        {
            if (!(region = create_region_from_req_data( get_req_data(), get_req_data_size() )))
                return;
        }
    }

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


2363 2364 2365
/* set a window property */
DECL_HANDLER(set_window_property)
{
2366
    struct unicode_str name;
2367 2368
    struct window *win = get_window( req->window );

2369 2370
    if (!win) return;

2371 2372
    get_req_unicode_str( &name );
    if (name.len)
2373
    {
2374
        atom_t atom = add_global_atom( NULL, &name );
2375 2376
        if (atom)
        {
2377
            set_property( win, atom, req->data, PROP_TYPE_STRING );
2378
            release_global_atom( NULL, atom );
2379 2380
        }
    }
2381
    else set_property( win, req->atom, req->data, PROP_TYPE_ATOM );
2382 2383 2384 2385 2386 2387
}


/* remove a window property */
DECL_HANDLER(remove_window_property)
{
2388
    struct unicode_str name;
2389
    struct window *win = get_window( req->window );
2390

2391
    get_req_unicode_str( &name );
2392
    if (win)
2393
    {
2394
        atom_t atom = name.len ? find_global_atom( NULL, &name ) : req->atom;
2395
        if (atom) reply->data = remove_property( win, atom );
2396
    }
2397 2398 2399 2400 2401 2402
}


/* get a window property */
DECL_HANDLER(get_window_property)
{
2403
    struct unicode_str name;
2404
    struct window *win = get_window( req->window );
2405

2406
    get_req_unicode_str( &name );
2407
    if (win)
2408
    {
2409
        atom_t atom = name.len ? find_global_atom( NULL, &name ) : req->atom;
2410
        if (atom) reply->data = get_property( win, atom );
2411
    }
2412 2413 2414 2415 2416 2417
}


/* get the list of properties of a window */
DECL_HANDLER(get_window_properties)
{
2418 2419
    property_data_t *data;
    int i, count, max = get_reply_max_size() / sizeof(*data);
2420 2421
    struct window *win = get_window( req->window );

2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436
    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);
2437
        data->data   = win->properties[i].data;
2438 2439 2440
        data++;
        count--;
    }
2441
}
2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452


/* 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;
    }
2453 2454 2455 2456 2457
    else if (*win)
    {
        set_error( STATUS_ACCESS_DENIED );
        return 0;
    }
2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492
    *win = get_window( handle );
    return (*win != NULL);
}

/* Set/get the global windows */
DECL_HANDLER(set_global_windows)
{
    struct window *new_shell_window   = shell_window;
    struct window *new_shell_listview = shell_listview;
    struct window *new_progman_window = progman_window;
    struct window *new_taskman_window = taskman_window;

    reply->old_shell_window   = shell_window ? shell_window->handle : 0;
    reply->old_shell_listview = shell_listview ? shell_listview->handle : 0;
    reply->old_progman_window = progman_window ? progman_window->handle : 0;
    reply->old_taskman_window = taskman_window ? taskman_window->handle : 0;

    if (req->flags & SET_GLOBAL_SHELL_WINDOWS)
    {
        if (!get_new_global_window( &new_shell_window, req->shell_window )) return;
        if (!get_new_global_window( &new_shell_listview, req->shell_listview )) return;
    }
    if (req->flags & SET_GLOBAL_PROGMAN_WINDOW)
    {
        if (!get_new_global_window( &new_progman_window, req->progman_window )) return;
    }
    if (req->flags & SET_GLOBAL_TASKMAN_WINDOW)
    {
        if (!get_new_global_window( &new_taskman_window, req->taskman_window )) return;
    }
    shell_window   = new_shell_window;
    shell_listview = new_shell_listview;
    progman_window = new_progman_window;
    taskman_window = new_taskman_window;
}
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/* retrieve layered info for a window */
DECL_HANDLER(get_window_layered_info)
{
    struct window *win = get_window( req->handle );

    if (!win) return;

    if (win->is_layered)
    {
        reply->color_key = win->color_key;
        reply->alpha     = win->alpha;
        reply->flags     = win->layered_flags;
    }
    else set_win32_error( ERROR_INVALID_WINDOW_HANDLE );
}


/* set layered info for a window */
DECL_HANDLER(set_window_layered_info)
{
    struct window *win = get_window( req->handle );

    if (!win) return;

    if (win->ex_style & WS_EX_LAYERED)
    {
        if (req->flags & LWA_ALPHA) win->alpha = req->alpha;
        else if (!win->is_layered) win->alpha = 0;  /* alpha init value is 0 */

        win->color_key     = req->color_key;
        win->layered_flags = req->flags;
        win->is_layered    = 1;
    }
    else set_win32_error( ERROR_INVALID_WINDOW_HANDLE );
}