2 * Server-side window handling
4 * Copyright (C) 2001 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "wine/port.h"
37 /* a window property */
40 unsigned short type; /* property type (see below) */
41 atom_t atom; /* property atom */
42 obj_handle_t handle; /* property handle (user-defined storage) */
47 PROP_TYPE_FREE, /* free entry */
48 PROP_TYPE_STRING, /* atom that was originally a string */
49 PROP_TYPE_ATOM /* plain atom */
55 struct window *parent; /* parent window */
56 user_handle_t owner; /* owner of this window */
57 struct window *first_child; /* first child in Z-order */
58 struct window *last_child; /* last child in Z-order */
59 struct window *first_unlinked; /* first child not linked in the Z-order list */
60 struct window *next; /* next window in Z-order */
61 struct window *prev; /* prev window in Z-order */
62 user_handle_t handle; /* full handle for this window */
63 struct thread *thread; /* thread owning the window */
64 atom_t atom; /* class atom */
65 user_handle_t last_active; /* last active popup */
66 rectangle_t window_rect; /* window rectangle */
67 rectangle_t client_rect; /* client rectangle */
68 unsigned int style; /* window style */
69 unsigned int ex_style; /* window extended style */
70 unsigned int id; /* window id */
71 void* instance; /* creator instance */
72 void* user_data; /* user-specific data */
73 WCHAR *text; /* window caption text */
74 int paint_count; /* count of pending paints for this window */
75 int prop_inuse; /* number of in-use window properties */
76 int prop_alloc; /* number of allocated window properties */
77 struct property *properties; /* window properties array */
80 static struct window *top_window; /* top-level (desktop) window */
83 /* retrieve a pointer to a window from its handle */
84 inline static struct window *get_window( user_handle_t handle )
86 struct window *ret = get_user_object( handle, USER_WINDOW );
87 if (!ret) set_error( STATUS_INVALID_HANDLE );
91 /* unlink a window from the tree */
92 static void unlink_window( struct window *win )
94 struct window *parent = win->parent;
98 if (win->next) win->next->prev = win->prev;
99 else if (parent->last_child == win) parent->last_child = win->prev;
101 if (win->prev) win->prev->next = win->next;
102 else if (parent->first_child == win) parent->first_child = win->next;
103 else if (parent->first_unlinked == win) parent->first_unlinked = win->next;
107 /* link a window into the tree (or unlink it if the new parent is NULL) */
108 static void link_window( struct window *win, struct window *parent, struct window *previous )
110 unlink_window( win ); /* unlink it from the previous location */
114 win->parent = parent;
115 if ((win->prev = previous))
117 if ((win->next = previous->next)) win->next->prev = win;
118 else if (win->parent->last_child == previous) win->parent->last_child = win;
119 win->prev->next = win;
123 if ((win->next = parent->first_child)) win->next->prev = win;
124 else win->parent->last_child = win;
125 parent->first_child = win;
128 else /* move it to parent unlinked list */
130 parent = win->parent;
131 if ((win->next = parent->first_unlinked)) win->next->prev = win;
133 parent->first_unlinked = win;
137 /* set a window property */
138 static void set_property( struct window *win, atom_t atom, obj_handle_t handle,
139 enum property_type type )
142 struct property *new_props;
144 /* check if it exists already */
145 for (i = 0; i < win->prop_inuse; i++)
147 if (win->properties[i].type == PROP_TYPE_FREE)
152 if (win->properties[i].atom == atom)
154 win->properties[i].type = type;
155 win->properties[i].handle = handle;
160 /* need to add an entry */
161 if (!grab_global_atom( atom )) return;
165 if (win->prop_inuse >= win->prop_alloc)
167 /* need to grow the array */
168 if (!(new_props = realloc( win->properties,
169 sizeof(*new_props) * (win->prop_alloc + 16) )))
171 set_error( STATUS_NO_MEMORY );
172 release_global_atom( atom );
175 win->prop_alloc += 16;
176 win->properties = new_props;
178 free = win->prop_inuse++;
180 win->properties[free].atom = atom;
181 win->properties[free].type = type;
182 win->properties[free].handle = handle;
185 /* remove a window property */
186 static obj_handle_t remove_property( struct window *win, atom_t atom )
190 for (i = 0; i < win->prop_inuse; i++)
192 if (win->properties[i].type == PROP_TYPE_FREE) continue;
193 if (win->properties[i].atom == atom)
195 release_global_atom( atom );
196 win->properties[i].type = PROP_TYPE_FREE;
197 return win->properties[i].handle;
200 /* FIXME: last error? */
204 /* find a window property */
205 static obj_handle_t get_property( struct window *win, atom_t atom )
209 for (i = 0; i < win->prop_inuse; i++)
211 if (win->properties[i].type == PROP_TYPE_FREE) continue;
212 if (win->properties[i].atom == atom) return win->properties[i].handle;
214 /* FIXME: last error? */
218 /* destroy all properties of a window */
219 inline static void destroy_properties( struct window *win )
223 if (!win->properties) return;
224 for (i = 0; i < win->prop_inuse; i++)
226 if (win->properties[i].type == PROP_TYPE_FREE) continue;
227 release_global_atom( win->properties[i].atom );
229 free( win->properties );
232 /* destroy a window */
233 static void destroy_window( struct window *win )
235 assert( win != top_window );
237 /* destroy all children */
238 while (win->first_child) destroy_window( win->first_child );
239 while (win->first_unlinked) destroy_window( win->first_unlinked );
241 if (win->thread->queue)
243 if (win->paint_count) inc_queue_paint_count( win->thread, -win->paint_count );
244 queue_cleanup_window( win->thread, win->handle );
246 free_user_handle( win->handle );
247 destroy_properties( win );
248 unlink_window( win );
249 if (win->text) free( win->text );
250 memset( win, 0x55, sizeof(*win) );
254 /* create a new window structure (note: the window is not linked in the window tree) */
255 static struct window *create_window( struct window *parent, struct window *owner, atom_t atom )
257 struct window *win = mem_alloc( sizeof(*win) );
258 if (!win) return NULL;
260 if (!(win->handle = alloc_user_handle( win, USER_WINDOW )))
265 win->parent = parent;
266 win->owner = owner ? owner->handle : 0;
267 win->first_child = NULL;
268 win->last_child = NULL;
269 win->first_unlinked = NULL;
270 win->thread = current;
272 win->last_active = win->handle;
276 win->instance = NULL;
277 win->user_data = NULL;
279 win->paint_count = 0;
282 win->properties = NULL;
284 if (parent) /* put it on parent unlinked list */
286 if ((win->next = parent->first_unlinked)) win->next->prev = win;
288 parent->first_unlinked = win;
290 else win->next = win->prev = NULL;
292 /* if parent belongs to a different thread, attach the two threads */
293 if (parent && parent->thread && parent->thread != current)
294 attach_thread_input( current, parent->thread );
298 /* destroy all windows belonging to a given thread */
299 void destroy_thread_windows( struct thread *thread )
301 user_handle_t handle = 0;
304 while ((win = next_user_handle( &handle, USER_WINDOW )))
306 if (win->thread != thread) continue;
307 destroy_window( win );
311 /* check whether child is a descendant of parent */
312 int is_child_window( user_handle_t parent, user_handle_t child )
314 struct window *child_ptr = get_user_object( child, USER_WINDOW );
315 struct window *parent_ptr = get_user_object( parent, USER_WINDOW );
317 if (!child_ptr || !parent_ptr) return 0;
318 while (child_ptr->parent)
320 if (child_ptr->parent == parent_ptr) return 1;
321 child_ptr = child_ptr->parent;
326 /* check whether window is a top-level window */
327 int is_top_level_window( user_handle_t window )
329 struct window *win = get_user_object( window, USER_WINDOW );
330 return (win && win->parent == top_window);
333 /* make a window active if possible */
334 int make_window_active( user_handle_t window )
336 struct window *owner, *win = get_window( window );
340 /* set last active for window and its owner */
341 win->last_active = win->handle;
342 if ((owner = get_user_object( win->owner, USER_WINDOW ))) owner->last_active = win->handle;
347 /* return the thread owning a window */
348 struct thread *get_window_thread( user_handle_t handle )
350 struct window *win = get_user_object( handle, USER_WINDOW );
351 if (!win || !win->thread) return NULL;
352 return (struct thread *)grab_object( win->thread );
355 /* find a child of the specified window that needs repainting */
356 static struct window *find_child_to_repaint( struct window *parent, struct thread *thread )
358 struct window *ptr, *ret = NULL;
360 for (ptr = parent->first_child; ptr && !ret; ptr = ptr->next)
362 if (!(ptr->style & WS_VISIBLE)) continue;
363 if (ptr->paint_count && ptr->thread == thread)
365 else /* explore its children */
366 ret = find_child_to_repaint( ptr, thread );
369 if (ret && (ret->ex_style & WS_EX_TRANSPARENT))
371 /* transparent window, check for non-transparent sibling to paint first */
372 for (ptr = ret->next; ptr; ptr = ptr->next)
374 if (!(ptr->style & WS_VISIBLE)) continue;
375 if (ptr->ex_style & WS_EX_TRANSPARENT) continue;
376 if (ptr->paint_count && ptr->thread == thread) return ptr;
383 /* find a window that needs repainting */
384 user_handle_t find_window_to_repaint( user_handle_t parent, struct thread *thread )
386 struct window *win = parent ? get_window( parent ) : top_window;
388 if (!win || !(win->style & WS_VISIBLE)) return 0;
389 if (!win->paint_count || win->thread != thread)
390 win = find_child_to_repaint( win, thread );
391 return win ? win->handle : 0;
395 /* create a window */
396 DECL_HANDLER(create_window)
399 if (!req->parent) /* return desktop window */
403 if (!(top_window = create_window( NULL, NULL, req->atom ))) return;
404 top_window->thread = NULL; /* no thread owns the desktop */
405 top_window->style = WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
407 reply->handle = top_window->handle;
411 struct window *win, *parent, *owner = NULL;
413 if (!(parent = get_window( req->parent ))) return;
414 if (req->owner && !(owner = get_window( req->owner ))) return;
415 if (owner == top_window) owner = NULL;
416 else if (owner && parent != top_window)
418 /* an owned window must be created as top-level */
419 set_error( STATUS_ACCESS_DENIED );
422 if (!(win = create_window( parent, owner, req->atom ))) return;
423 reply->handle = win->handle;
428 /* link a window into the tree */
429 DECL_HANDLER(link_window)
431 struct window *win, *parent = NULL, *previous = NULL;
433 if (!(win = get_window( req->handle ))) return;
434 if (req->parent && !(parent = get_window( req->parent ))) return;
436 if (win == top_window)
438 set_error( STATUS_INVALID_PARAMETER );
441 reply->full_parent = parent ? parent->handle : 0;
442 if (parent && req->previous)
444 if (req->previous == (user_handle_t)1) /* special case: HWND_BOTTOM */
446 previous = parent->last_child;
447 if (previous == win) return; /* nothing to do */
451 if (!(previous = get_window( req->previous ))) return;
452 /* previous must be a child of parent, and not win itself */
453 if (previous->parent != parent || previous == win)
455 set_error( STATUS_INVALID_PARAMETER );
460 link_window( win, parent, previous );
464 /* destroy a window */
465 DECL_HANDLER(destroy_window)
467 struct window *win = get_window( req->handle );
470 if (win != top_window) destroy_window( win );
471 else set_error( STATUS_ACCESS_DENIED );
476 /* set a window owner */
477 DECL_HANDLER(set_window_owner)
479 struct window *win = get_window( req->handle );
480 struct window *owner = NULL;
483 if (req->owner && !(owner = get_window( req->owner ))) return;
484 if (win == top_window)
486 set_error( STATUS_ACCESS_DENIED );
489 reply->prev_owner = win->owner;
490 reply->full_owner = win->owner = owner ? owner->handle : 0;
494 /* get information from a window handle */
495 DECL_HANDLER(get_window_info)
497 struct window *win = get_window( req->handle );
499 reply->full_handle = 0;
500 reply->tid = reply->pid = 0;
503 reply->full_handle = win->handle;
504 reply->last_active = win->handle;
505 if (get_user_object( win->last_active, USER_WINDOW )) reply->last_active = win->last_active;
508 reply->tid = get_thread_id( win->thread );
509 reply->pid = get_process_id( win->thread->process );
510 reply->atom = win->atom;
516 /* set some information in a window */
517 DECL_HANDLER(set_window_info)
519 struct window *win = get_window( req->handle );
522 if (req->flags && win == top_window)
524 set_error( STATUS_ACCESS_DENIED );
527 reply->old_style = win->style;
528 reply->old_ex_style = win->ex_style;
529 reply->old_id = win->id;
530 reply->old_instance = win->instance;
531 reply->old_user_data = win->user_data;
532 if (req->flags & SET_WIN_STYLE) win->style = req->style;
533 if (req->flags & SET_WIN_EXSTYLE) win->ex_style = req->ex_style;
534 if (req->flags & SET_WIN_ID) win->id = req->id;
535 if (req->flags & SET_WIN_INSTANCE) win->instance = req->instance;
536 if (req->flags & SET_WIN_USERDATA) win->user_data = req->user_data;
540 /* get a list of the window parents, up to the root of the tree */
541 DECL_HANDLER(get_window_parents)
543 struct window *ptr, *win = get_window( req->handle );
548 if (win) for (ptr = win->parent; ptr; ptr = ptr->parent) total++;
550 reply->count = total;
551 len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
552 if (len && ((data = set_reply_data_size( len ))))
554 for (ptr = win->parent; ptr && len; ptr = ptr->parent, len -= sizeof(*data))
555 *data++ = ptr->handle;
560 /* get a list of the window children */
561 DECL_HANDLER(get_window_children)
563 struct window *ptr, *parent = get_window( req->parent );
569 for (ptr = parent->first_child, total = 0; ptr; ptr = ptr->next)
571 if (req->atom && ptr->atom != req->atom) continue;
572 if (req->tid && get_thread_id(ptr->thread) != req->tid) continue;
576 reply->count = total;
577 len = min( get_reply_max_size(), total * sizeof(user_handle_t) );
578 if (len && ((data = set_reply_data_size( len ))))
580 for (ptr = parent->first_child; ptr && len; ptr = ptr->next)
582 if (req->atom && ptr->atom != req->atom) continue;
583 if (req->tid && get_thread_id(ptr->thread) != req->tid) continue;
584 *data++ = ptr->handle;
585 len -= sizeof(*data);
591 /* get window tree information from a window handle */
592 DECL_HANDLER(get_window_tree)
594 struct window *win = get_window( req->handle );
600 struct window *parent = win->parent;
601 reply->parent = parent->handle;
602 reply->owner = win->owner;
603 reply->next_sibling = win->next ? win->next->handle : 0;
604 reply->prev_sibling = win->prev ? win->prev->handle : 0;
605 reply->first_sibling = parent->first_child ? parent->first_child->handle : 0;
606 reply->last_sibling = parent->last_child ? parent->last_child->handle : 0;
612 reply->next_sibling = 0;
613 reply->prev_sibling = 0;
614 reply->first_sibling = 0;
615 reply->last_sibling = 0;
617 reply->first_child = win->first_child ? win->first_child->handle : 0;
618 reply->last_child = win->last_child ? win->last_child->handle : 0;
622 /* set the window and client rectangles of a window */
623 DECL_HANDLER(set_window_rectangles)
625 struct window *win = get_window( req->handle );
629 win->window_rect = req->window;
630 win->client_rect = req->client;
635 /* get the window and client rectangles of a window */
636 DECL_HANDLER(get_window_rectangles)
638 struct window *win = get_window( req->handle );
642 reply->window = win->window_rect;
643 reply->client = win->client_rect;
648 /* get the window text */
649 DECL_HANDLER(get_window_text)
651 struct window *win = get_window( req->handle );
653 if (win && win->text)
655 size_t len = strlenW( win->text ) * sizeof(WCHAR);
656 if (len > get_reply_max_size()) len = get_reply_max_size();
657 set_reply_data( win->text, len );
662 /* set the window text */
663 DECL_HANDLER(set_window_text)
665 struct window *win = get_window( req->handle );
670 size_t len = get_req_data_size() / sizeof(WCHAR);
673 if (!(text = mem_alloc( (len+1) * sizeof(WCHAR) ))) return;
674 memcpy( text, get_req_data(), len * sizeof(WCHAR) );
677 if (win->text) free( win->text );
683 /* increment the window paint count */
684 DECL_HANDLER(inc_window_paint_count)
686 struct window *win = get_window( req->handle );
688 if (win && win->thread)
690 int old = win->paint_count;
691 if ((win->paint_count += req->incr) < 0) win->paint_count = 0;
692 inc_queue_paint_count( win->thread, win->paint_count - old );
697 /* get the coordinates offset between two windows */
698 DECL_HANDLER(get_windows_offset)
702 reply->x = reply->y = 0;
705 if (!(win = get_window( req->from ))) return;
708 reply->x += win->client_rect.left;
709 reply->y += win->client_rect.top;
715 if (!(win = get_window( req->to ))) return;
718 reply->x -= win->client_rect.left;
719 reply->y -= win->client_rect.top;
726 /* set a window property */
727 DECL_HANDLER(set_window_property)
729 struct window *win = get_window( req->window );
731 if (win) set_property( win, req->atom, req->handle,
732 req->string ? PROP_TYPE_STRING : PROP_TYPE_ATOM );
736 /* remove a window property */
737 DECL_HANDLER(remove_window_property)
739 struct window *win = get_window( req->window );
741 if (win) reply->handle = remove_property( win, req->atom );
745 /* get a window property */
746 DECL_HANDLER(get_window_property)
748 struct window *win = get_window( req->window );
750 if (win) reply->handle = get_property( win, req->atom );
754 /* get the list of properties of a window */
755 DECL_HANDLER(get_window_properties)
757 property_data_t *data;
758 int i, count, max = get_reply_max_size() / sizeof(*data);
759 struct window *win = get_window( req->window );
764 for (i = count = 0; i < win->prop_inuse; i++)
765 if (win->properties[i].type != PROP_TYPE_FREE) count++;
766 reply->total = count;
768 if (count > max) count = max;
769 if (!count || !(data = set_reply_data_size( count * sizeof(*data) ))) return;
771 for (i = 0; i < win->prop_inuse && count; i++)
773 if (win->properties[i].type == PROP_TYPE_FREE) continue;
774 data->atom = win->properties[i].atom;
775 data->string = (win->properties[i].type == PROP_TYPE_STRING);
776 data->handle = win->properties[i].handle;