632 lines
18 KiB
C
632 lines
18 KiB
C
/*
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* Server-side window handling
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*
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* Copyright (C) 2001 Alexandre Julliard
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*/
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#include <assert.h>
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#include "object.h"
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#include "request.h"
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#include "thread.h"
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#include "process.h"
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#include "user.h"
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/* a window property */
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struct property
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{
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unsigned short type; /* property type (see below) */
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atom_t atom; /* property atom */
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handle_t handle; /* property handle (user-defined storage) */
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};
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enum property_type
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{
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PROP_TYPE_FREE, /* free entry */
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PROP_TYPE_STRING, /* atom that was originally a string */
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PROP_TYPE_ATOM /* plain atom */
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};
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struct window
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{
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struct window *parent; /* parent window */
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struct window *owner; /* owner of this window */
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struct window *first_child; /* first child in Z-order */
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struct window *last_child; /* last child in Z-order */
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struct window *first_unlinked; /* first child not linked in the Z-order list */
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struct window *next; /* next window in Z-order */
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struct window *prev; /* prev window in Z-order */
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user_handle_t handle; /* full handle for this window */
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struct thread *thread; /* thread owning the window */
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atom_t atom; /* class atom */
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rectangle_t window_rect; /* window rectangle */
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rectangle_t client_rect; /* client rectangle */
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unsigned int style; /* window style */
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unsigned int ex_style; /* window extended style */
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unsigned int id; /* window id */
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void* instance; /* creator instance */
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void* user_data; /* user-specific data */
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int prop_inuse; /* number of in-use window properties */
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int prop_alloc; /* number of allocated window properties */
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struct property *properties; /* window properties array */
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};
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static struct window *top_window; /* top-level (desktop) window */
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/* retrieve a pointer to a window from its handle */
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inline static struct window *get_window( user_handle_t handle )
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{
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struct window *ret = get_user_object( handle, USER_WINDOW );
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if (!ret) set_error( STATUS_INVALID_HANDLE );
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return ret;
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}
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/* unlink a window from the tree */
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static void unlink_window( struct window *win )
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{
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struct window *parent = win->parent;
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assert( parent );
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if (win->next) win->next->prev = win->prev;
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else if (parent->last_child == win) parent->last_child = win->prev;
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if (win->prev) win->prev->next = win->next;
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else if (parent->first_child == win) parent->first_child = win->next;
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else if (parent->first_unlinked == win) parent->first_unlinked = win->next;
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}
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/* link a window into the tree (or unlink it if the new parent is NULL) */
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static void link_window( struct window *win, struct window *parent, struct window *previous )
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{
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unlink_window( win ); /* unlink it from the previous location */
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if (parent)
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{
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if (win->parent != parent)
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{
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win->owner = NULL; /* reset owner if changing parent */
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win->parent = parent;
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}
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if ((win->prev = previous))
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{
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if ((win->next = previous->next)) win->next->prev = win;
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else if (win->parent->last_child == previous) win->parent->last_child = win;
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win->prev->next = win;
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}
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else
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{
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if ((win->next = parent->first_child)) win->next->prev = win;
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else win->parent->last_child = win;
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parent->first_child = win;
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}
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}
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else /* move it to parent unlinked list */
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{
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parent = win->parent;
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if ((win->next = parent->first_unlinked)) win->next->prev = win;
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win->prev = NULL;
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parent->first_unlinked = win;
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}
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}
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/* set a window property */
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static void set_property( struct window *win, atom_t atom, handle_t handle,
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enum property_type type )
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{
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int i, free = -1;
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struct property *new_props;
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/* check if it exists already */
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for (i = 0; i < win->prop_inuse; i++)
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{
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if (win->properties[i].type == PROP_TYPE_FREE)
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{
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free = i;
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continue;
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}
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if (win->properties[i].atom == atom)
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{
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win->properties[i].type = type;
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win->properties[i].handle = handle;
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return;
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}
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}
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/* need to add an entry */
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if (!grab_global_atom( atom )) return;
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if (free == -1)
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{
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/* no free entry */
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if (win->prop_inuse >= win->prop_alloc)
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{
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/* need to grow the array */
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if (!(new_props = realloc( win->properties,
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sizeof(*new_props) * (win->prop_alloc + 16) )))
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{
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set_error( STATUS_NO_MEMORY );
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release_global_atom( atom );
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return;
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}
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win->prop_alloc += 16;
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win->properties = new_props;
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}
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free = win->prop_inuse++;
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}
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win->properties[free].atom = atom;
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win->properties[free].type = type;
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win->properties[free].handle = handle;
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}
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/* remove a window property */
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static handle_t remove_property( struct window *win, atom_t atom )
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{
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int i;
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for (i = 0; i < win->prop_inuse; i++)
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{
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if (win->properties[i].type == PROP_TYPE_FREE) continue;
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if (win->properties[i].atom == atom)
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{
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release_global_atom( atom );
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win->properties[i].type = PROP_TYPE_FREE;
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return win->properties[i].handle;
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}
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}
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/* FIXME: last error? */
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return 0;
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}
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/* find a window property */
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static handle_t get_property( struct window *win, atom_t atom )
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{
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int i;
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for (i = 0; i < win->prop_inuse; i++)
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{
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if (win->properties[i].type == PROP_TYPE_FREE) continue;
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if (win->properties[i].atom == atom) return win->properties[i].handle;
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}
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/* FIXME: last error? */
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return 0;
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}
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/* destroy all properties of a window */
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inline static void destroy_properties( struct window *win )
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{
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int i;
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if (!win->properties) return;
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for (i = 0; i < win->prop_inuse; i++)
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{
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if (win->properties[i].type == PROP_TYPE_FREE) continue;
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release_global_atom( win->properties[i].atom );
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}
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free( win->properties );
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}
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/* enum all properties into the data array */
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static int enum_properties( struct window *win, property_data_t *data, int max )
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{
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int i, count;
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for (i = count = 0; i < win->prop_inuse && count < max; i++)
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{
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if (win->properties[i].type == PROP_TYPE_FREE) continue;
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data->atom = win->properties[i].atom;
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data->string = (win->properties[i].type == PROP_TYPE_STRING);
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data->handle = win->properties[i].handle;
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data++;
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count++;
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}
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return count;
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}
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/* destroy a window */
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static void destroy_window( struct window *win )
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{
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assert( win != top_window );
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/* destroy all children */
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while (win->first_child) destroy_window( win->first_child );
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while (win->first_unlinked) destroy_window( win->first_unlinked );
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/* reset siblings owner */
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if (win->parent)
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{
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struct window *ptr;
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for (ptr = win->parent->first_child; ptr; ptr = ptr->next)
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if (ptr->owner == win) ptr->owner = NULL;
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for (ptr = win->parent->first_unlinked; ptr; ptr = ptr->next)
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if (ptr->owner == win) ptr->owner = NULL;
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}
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if (win->thread->queue) queue_cleanup_window( win->thread, win->handle );
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free_user_handle( win->handle );
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destroy_properties( win );
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unlink_window( win );
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memset( win, 0x55, sizeof(*win) );
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free( win );
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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, atom_t atom )
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{
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struct window *win = mem_alloc( sizeof(*win) );
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if (!win) return NULL;
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if (!(win->handle = alloc_user_handle( win, USER_WINDOW )))
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{
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free( win );
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return NULL;
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}
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win->parent = parent;
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win->owner = owner;
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win->first_child = NULL;
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win->last_child = NULL;
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win->first_unlinked = NULL;
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win->thread = current;
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win->atom = atom;
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win->style = 0;
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win->ex_style = 0;
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win->id = 0;
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win->instance = NULL;
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win->user_data = NULL;
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win->prop_inuse = 0;
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win->prop_alloc = 0;
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win->properties = NULL;
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if (parent) /* put it on parent unlinked list */
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{
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if ((win->next = parent->first_unlinked)) win->next->prev = win;
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win->prev = NULL;
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parent->first_unlinked = win;
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}
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else win->next = win->prev = NULL;
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return win;
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}
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/* destroy all windows belonging to a given thread */
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void destroy_thread_windows( struct thread *thread )
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{
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user_handle_t handle = 0;
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struct window *win;
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while ((win = next_user_handle( &handle, USER_WINDOW )))
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{
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if (win->thread != thread) continue;
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destroy_window( win );
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}
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}
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/* check whether child is a descendant of parent */
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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 );
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struct window *parent_ptr = get_user_object( parent, USER_WINDOW );
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if (!child_ptr || !parent_ptr) return 0;
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while (child_ptr->parent)
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{
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if (child_ptr->parent == parent_ptr) return 1;
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child_ptr = child_ptr->parent;
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}
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return 0;
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}
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/* create a window */
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DECL_HANDLER(create_window)
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{
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req->handle = 0;
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if (!req->parent) /* return desktop window */
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{
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if (!top_window)
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{
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if (!(top_window = create_window( NULL, NULL, req->atom ))) return;
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top_window->thread = NULL; /* no thread owns the desktop */
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}
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req->handle = top_window->handle;
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}
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else
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{
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struct window *win, *parent, *owner = NULL;
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if (!(parent = get_window( req->parent ))) return;
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if (req->owner && !(owner = get_window( req->owner ))) return;
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if (owner && owner->parent != parent)
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{
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/* owner must be a sibling of the new window */
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set_error( STATUS_ACCESS_DENIED );
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return;
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}
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if (!(win = create_window( parent, owner, req->atom ))) return;
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req->handle = win->handle;
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}
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}
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/* link a window into the tree */
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DECL_HANDLER(link_window)
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{
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struct window *win, *parent = NULL, *previous = NULL;
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if (!(win = get_window( req->handle ))) return;
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if (req->parent && !(parent = get_window( req->parent ))) return;
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if (win == top_window)
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{
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set_error( STATUS_INVALID_PARAMETER );
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return;
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}
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req->full_parent = parent ? parent->handle : 0;
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if (parent && req->previous)
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{
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if (req->previous == (user_handle_t)1) /* special case: HWND_BOTTOM */
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{
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previous = parent->last_child;
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if (previous == win) return; /* nothing to do */
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}
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else
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{
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if (!(previous = get_window( req->previous ))) return;
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/* previous must be a child of parent, and not win itself */
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if (previous->parent != parent || previous == win)
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{
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set_error( STATUS_INVALID_PARAMETER );
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return;
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}
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}
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}
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link_window( win, parent, previous );
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}
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/* destroy a window */
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DECL_HANDLER(destroy_window)
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{
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struct window *win = get_window( req->handle );
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if (win)
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{
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if (win != top_window) destroy_window( win );
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else set_error( STATUS_ACCESS_DENIED );
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}
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}
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/* set a window owner */
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DECL_HANDLER(set_window_owner)
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{
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struct window *win = get_window( req->handle );
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struct window *owner = get_window( req->owner );
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if (!win || !owner) return;
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if (owner->parent != win->parent)
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{
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/* owner has to be a sibling of window */
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set_error( STATUS_ACCESS_DENIED );
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return;
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}
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win->owner = owner;
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req->full_owner = owner->handle;
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}
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/* get information from a window handle */
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DECL_HANDLER(get_window_info)
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{
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struct window *win = get_window( req->handle );
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req->full_handle = 0;
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req->tid = req->pid = 0;
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if (win)
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{
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req->full_handle = win->handle;
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if (win->thread)
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{
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req->tid = get_thread_id( win->thread );
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req->pid = get_process_id( win->thread->process );
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req->atom = win->atom;
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}
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}
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}
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/* set some information in a window */
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DECL_HANDLER(set_window_info)
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{
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struct window *win = get_window( req->handle );
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if (!win) return;
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req->old_style = win->style;
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req->old_ex_style = win->ex_style;
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req->old_id = win->id;
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req->old_instance = win->instance;
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req->old_user_data = win->user_data;
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if (req->flags & SET_WIN_STYLE) win->style = req->style;
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if (req->flags & SET_WIN_EXSTYLE) win->ex_style = req->ex_style;
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if (req->flags & SET_WIN_ID) win->id = req->id;
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if (req->flags & SET_WIN_INSTANCE) win->instance = req->instance;
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if (req->flags & SET_WIN_USERDATA) win->user_data = req->user_data;
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}
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/* get a list of the window parents, up to the root of the tree */
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DECL_HANDLER(get_window_parents)
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{
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struct window *ptr, *win = get_window( req->handle );
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int total = 0;
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size_t len;
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if (win) for (ptr = win->parent; ptr; ptr = ptr->parent) total++;
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req->count = total;
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len = min( get_req_data_size(req), total * sizeof(user_handle_t) );
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set_req_data_size( req, len );
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if (len)
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{
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user_handle_t *data = get_req_data(req);
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for (ptr = win->parent; ptr && len; ptr = ptr->parent, len -= sizeof(*data))
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*data++ = ptr->handle;
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}
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}
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/* get a list of the window children */
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DECL_HANDLER(get_window_children)
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{
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struct window *ptr, *parent = get_window( req->parent );
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int total = 0;
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size_t len;
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if (parent)
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for (ptr = parent->first_child, total = 0; ptr; ptr = ptr->next)
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{
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if (req->atom && ptr->atom != req->atom) continue;
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if (req->tid && get_thread_id(ptr->thread) != req->tid) continue;
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total++;
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}
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req->count = total;
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len = min( get_req_data_size(req), total * sizeof(user_handle_t) );
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set_req_data_size( req, len );
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if (len)
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{
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user_handle_t *data = get_req_data(req);
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for (ptr = parent->first_child; ptr && len; ptr = ptr->next, len -= sizeof(*data))
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{
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if (req->atom && ptr->atom != req->atom) continue;
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if (req->tid && get_thread_id(ptr->thread) != req->tid) continue;
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*data++ = ptr->handle;
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}
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}
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}
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/* get window tree information from a window handle */
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DECL_HANDLER(get_window_tree)
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{
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struct window *win = get_window( req->handle );
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if (!win) return;
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if (win->parent)
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{
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struct window *parent = win->parent;
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req->parent = parent->handle;
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req->owner = win->owner ? win->owner->handle : 0;
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req->next_sibling = win->next ? win->next->handle : 0;
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req->prev_sibling = win->prev ? win->prev->handle : 0;
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req->first_sibling = parent->first_child ? parent->first_child->handle : 0;
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req->last_sibling = parent->last_child ? parent->last_child->handle : 0;
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}
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else
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{
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req->parent = 0;
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req->owner = 0;
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req->next_sibling = 0;
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req->prev_sibling = 0;
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req->first_sibling = 0;
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req->last_sibling = 0;
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}
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req->first_child = win->first_child ? win->first_child->handle : 0;
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req->last_child = win->last_child ? win->last_child->handle : 0;
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}
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/* set the window and client rectangles of a window */
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DECL_HANDLER(set_window_rectangles)
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{
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struct window *win = get_window( req->handle );
|
|
|
|
if (win)
|
|
{
|
|
win->window_rect = req->window;
|
|
win->client_rect = req->client;
|
|
}
|
|
}
|
|
|
|
|
|
/* get the window and client rectangles of a window */
|
|
DECL_HANDLER(get_window_rectangles)
|
|
{
|
|
struct window *win = get_window( req->handle );
|
|
|
|
if (win)
|
|
{
|
|
req->window = win->window_rect;
|
|
req->client = win->client_rect;
|
|
}
|
|
}
|
|
|
|
|
|
/* get the coordinates offset between two windows */
|
|
DECL_HANDLER(get_windows_offset)
|
|
{
|
|
struct window *win;
|
|
|
|
req->x = req->y = 0;
|
|
if (req->from)
|
|
{
|
|
if (!(win = get_window( req->from ))) return;
|
|
while (win)
|
|
{
|
|
req->x += win->client_rect.left;
|
|
req->y += win->client_rect.top;
|
|
win = win->parent;
|
|
}
|
|
}
|
|
if (req->to)
|
|
{
|
|
if (!(win = get_window( req->to ))) return;
|
|
while (win)
|
|
{
|
|
req->x -= win->client_rect.left;
|
|
req->y -= win->client_rect.top;
|
|
win = win->parent;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* set a window property */
|
|
DECL_HANDLER(set_window_property)
|
|
{
|
|
struct window *win = get_window( req->window );
|
|
|
|
if (win) set_property( win, req->atom, req->handle,
|
|
req->string ? PROP_TYPE_STRING : PROP_TYPE_ATOM );
|
|
}
|
|
|
|
|
|
/* remove a window property */
|
|
DECL_HANDLER(remove_window_property)
|
|
{
|
|
struct window *win = get_window( req->window );
|
|
req->handle = 0;
|
|
if (win) req->handle = remove_property( win, req->atom );
|
|
}
|
|
|
|
|
|
/* get a window property */
|
|
DECL_HANDLER(get_window_property)
|
|
{
|
|
struct window *win = get_window( req->window );
|
|
req->handle = 0;
|
|
if (win) req->handle = get_property( win, req->atom );
|
|
}
|
|
|
|
|
|
/* get the list of properties of a window */
|
|
DECL_HANDLER(get_window_properties)
|
|
{
|
|
int count = 0;
|
|
property_data_t *data = get_req_data(req);
|
|
struct window *win = get_window( req->window );
|
|
|
|
if (win) count = enum_properties( win, data, get_req_data_size(req) / sizeof(*data) );
|
|
set_req_data_size( req, count * sizeof(*data) );
|
|
}
|