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wmaker/src/stacking.c

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/*
* Window Maker window manager
*
* Copyright (c) 1997-2003 Alfredo K. Kojima
* Copyright (c) 1998-2003 Dan Pascu
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "wconfig.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include "WindowMaker.h"
#include "screen.h"
#include "window.h"
#include "actions.h"
#include "properties.h"
#include "stacking.h"
#include "workspace.h"
static void notifyStackChange(WCoreWindow * frame, char *detail)
{
WWindow *wwin = wWindowFor(frame->window);
WMPostNotificationName(WMNChangedStacking, wwin, detail);
}
/*
*----------------------------------------------------------------------
* RemakeStackList--
* Remakes the stacking_list for the screen, getting the real
* stacking order from the server and reordering windows that are not
* in the correct stacking.
*
* Side effects:
* The stacking order list and the actual window stacking
* may be changed (corrected)
*
*----------------------------------------------------------------------
*/
void RemakeStackList(WScreen * scr)
{
Window *windows;
unsigned int nwindows;
Window junkr, junkp;
WCoreWindow *frame;
WCoreWindow *tmp;
int level;
int i, c;
if (!XQueryTree(dpy, scr->root_win, &junkr, &junkp, &windows, &nwindows)) {
wwarning(_("could not get window list!!"));
return;
} else {
WMEmptyBag(scr->stacking_list);
/* verify list integrity */
c = 0;
for (i = 0; i < nwindows; i++) {
if (XFindContext(dpy, windows[i], w_global.context.stack, (XPointer *) & frame)
== XCNOENT) {
continue;
}
if (!frame)
continue;
c++;
level = frame->stacking->window_level;
tmp = WMGetFromBag(scr->stacking_list, level);
if (tmp)
tmp->stacking->above = frame;
frame->stacking->under = tmp;
frame->stacking->above = NULL;
WMSetInBag(scr->stacking_list, level, frame);
}
XFree(windows);
scr->window_count = c;
}
CommitStacking(scr);
}
/*
*----------------------------------------------------------------------
* CommitStacking--
* Reorders the actual window stacking, so that it has the stacking
* order in the internal window stacking lists. It does the opposite
* of RemakeStackList().
*
* Side effects:
* Windows may be restacked.
*----------------------------------------------------------------------
*/
void CommitStacking(WScreen * scr)
{
WCoreWindow *tmp;
int nwindows, i;
Window *windows;
WMBagIterator iter;
nwindows = scr->window_count;
windows = wmalloc(sizeof(Window) * nwindows);
i = 0;
WM_ETARETI_BAG(scr->stacking_list, tmp, iter) {
while (tmp) {
windows[i++] = tmp->window;
tmp = tmp->stacking->under;
}
}
XRestackWindows(dpy, windows, i);
wfree(windows);
WMPostNotificationName(WMNResetStacking, scr, NULL);
}
/*
*----------------------------------------------------------------------
* moveFrameToUnder--
* Reestacks windows so that "frame" is under "under".
*
* Returns:
* None
*
* Side effects:
* Changes the stacking order of frame.
*----------------------------------------------------------------------
*/
static void moveFrameToUnder(WCoreWindow * under, WCoreWindow * frame)
{
Window wins[2];
wins[0] = under->window;
wins[1] = frame->window;
XRestackWindows(dpy, wins, 2);
}
/*
*----------------------------------------------------------------------
* CommitStackingForWindow--
* Reorders the stacking for the specified window, so that it has the
* stacking order in the internal window stacking lists.
*
* Side effects:
* Windows may be restacked.
*----------------------------------------------------------------------
*/
void CommitStackingForWindow(WCoreWindow * frame)
{
int level = frame->stacking->window_level;
WScreen *scr = frame->screen_ptr;
if (frame->stacking->above == NULL) {
WMBagIterator iter;
WCoreWindow *above = WMBagLast(scr->stacking_list, &iter);
int i, last = above->stacking->window_level;
/* find the 1st level above us which has windows in it */
for (i = level + 1, above = NULL; i <= last; i++) {
above = WMGetFromBag(scr->stacking_list, i);
if (above != NULL)
break;
}
if (above != frame && above != NULL) {
while (above->stacking->under)
above = above->stacking->under;
moveFrameToUnder(above, frame);
} else {
/* no window above us */
XRaiseWindow(dpy, frame->window);
}
} else {
moveFrameToUnder(frame->stacking->above, frame);
}
}
/*
*----------------------------------------------------------------------
* wRaiseFrame--
* Raises a frame taking the window level into account.
*
* Returns:
* None
*
* Side effects:
* Window stacking order and stacking list are changed.
*
*----------------------------------------------------------------------
*/
void wRaiseFrame(WCoreWindow * frame)
{
WCoreWindow *wlist = frame;
int level = frame->stacking->window_level;
WScreen *scr = frame->screen_ptr;
/* already on top */
if (frame->stacking->above == NULL) {
return;
}
/* insert it on top of other windows on the same level */
if (frame->stacking->under)
frame->stacking->under->stacking->above = frame->stacking->above;
if (frame->stacking->above)
frame->stacking->above->stacking->under = frame->stacking->under;
frame->stacking->above = NULL;
frame->stacking->under = WMGetFromBag(scr->stacking_list, level);
if (frame->stacking->under) {
frame->stacking->under->stacking->above = frame;
}
WMSetInBag(scr->stacking_list, level, frame);
/* raise transients under us from bottom to top
* so that the order is kept */
again:
wlist = frame->stacking->under;
while (wlist && wlist->stacking->under)
wlist = wlist->stacking->under;
while (wlist && wlist != frame) {
if (wlist->stacking->child_of == frame) {
wRaiseFrame(wlist);
goto again;
}
wlist = wlist->stacking->above;
}
/* try to optimize things a little */
if (frame->stacking->above == NULL) {
WMBagIterator iter;
WCoreWindow *above = WMBagLast(scr->stacking_list, &iter);
int i, last = above->stacking->window_level;
/* find the 1st level above us which has windows in it */
for (i = level + 1, above = NULL; i <= last; i++) {
above = WMGetFromBag(scr->stacking_list, i);
if (above != NULL)
break;
}
if (above != frame && above != NULL) {
while (above->stacking->under)
above = above->stacking->under;
moveFrameToUnder(above, frame);
} else {
/* no window above us */
above = NULL;
XRaiseWindow(dpy, frame->window);
}
} else {
moveFrameToUnder(frame->stacking->above, frame);
}
notifyStackChange(frame, "raise");
}
void wRaiseLowerFrame(WCoreWindow * frame)
{
if (!frame->stacking->above
|| (frame->stacking->window_level != frame->stacking->above->stacking->window_level)) {
wLowerFrame(frame);
} else {
WCoreWindow *scan = frame->stacking->above;
WWindow *frame_wwin = (WWindow *) frame->descriptor.parent;
while (scan) {
if (scan->descriptor.parent_type == WCLASS_WINDOW) {
WWindow *scan_wwin = (WWindow *) scan->descriptor.parent;
if (wWindowObscuresWindow(scan_wwin, frame_wwin)
&& scan_wwin->flags.mapped) {
break;
}
}
scan = scan->stacking->above;
}
if (scan) {
wRaiseFrame(frame);
} else {
wLowerFrame(frame);
}
}
}
void wLowerFrame(WCoreWindow * frame)
{
WScreen *scr = frame->screen_ptr;
WCoreWindow *wlist = frame;
int level = frame->stacking->window_level;
/* already in bottom */
if (wlist->stacking->under == NULL) {
return;
}
/* cant lower transient below below its owner */
if (wlist->stacking->under == wlist->stacking->child_of) {
return;
}
/* remove from the list */
if (WMGetFromBag(scr->stacking_list, level) == frame) {
/* it was the top window */
WMSetInBag(scr->stacking_list, level, frame->stacking->under);
frame->stacking->under->stacking->above = NULL;
} else {
if (frame->stacking->under)
frame->stacking->under->stacking->above = frame->stacking->above;
if (frame->stacking->above)
frame->stacking->above->stacking->under = frame->stacking->under;
}
wlist = WMGetFromBag(scr->stacking_list, level);
/* look for place to put this window */
if (wlist) {
WCoreWindow *owner = frame->stacking->child_of;
if (owner != wlist) {
while (wlist->stacking->under) {
/* if this is a transient, it should not be placed under
* it's owner */
if (owner == wlist->stacking->under)
break;
wlist = wlist->stacking->under;
}
}
}
/* insert under the place found */
frame->stacking->above = wlist;
if (wlist) {
frame->stacking->under = wlist->stacking->under;
if (wlist->stacking->under)
wlist->stacking->under->stacking->above = frame;
wlist->stacking->under = frame;
} else {
frame->stacking->under = NULL;
}
if (frame->stacking->above == NULL) {
WMBagIterator iter;
WCoreWindow *above = WMBagLast(scr->stacking_list, &iter);
int i, last = above->stacking->window_level;
/* find the 1st level above us which has windows in it */
for (i = level + 1, above = NULL; i <= last; i++) {
above = WMGetFromBag(scr->stacking_list, i);
if (above != NULL)
break;
}
if (above != frame && above != NULL) {
while (above->stacking->under)
above = above->stacking->under;
moveFrameToUnder(above, frame);
} else {
/* no window below us */
XLowerWindow(dpy, frame->window);
}
} else {
moveFrameToUnder(frame->stacking->above, frame);
}
notifyStackChange(frame, "lower");
}
/*
*----------------------------------------------------------------------
* AddToStackList--
* Inserts the frame in the top of the stacking list. The
* stacking precedence is obeyed.
*
* Returns:
* None
*
* Side effects:
* The frame is added to it's screen's window list.
*----------------------------------------------------------------------
*/
void AddToStackList(WCoreWindow * frame)
{
WCoreWindow *curtop, *wlist;
int index = frame->stacking->window_level;
WScreen *scr = frame->screen_ptr;
WCoreWindow *trans = NULL;
frame->screen_ptr->window_count++;
XSaveContext(dpy, frame->window, w_global.context.stack, (XPointer) frame);
curtop = WMGetFromBag(scr->stacking_list, index);
/* first window in this level */
if (curtop == NULL) {
WMSetInBag(scr->stacking_list, index, frame);
frame->stacking->above = NULL;
frame->stacking->under = NULL;
CommitStacking(scr);
return;
}
/* check if this is a transient owner */
wlist = curtop;
while (wlist) {
if (wlist->stacking->child_of == frame)
trans = wlist;
wlist = wlist->stacking->under;
}
/* trans will hold the transient in the lowest position
* in stacking list */
frame->stacking->above = trans;
if (trans != NULL) {
/* window is owner of a transient.. put it below
* the lowest transient */
frame->stacking->under = trans->stacking->under;
if (trans->stacking->under) {
trans->stacking->under->stacking->above = frame;
}
trans->stacking->under = frame;
} else {
/* window is not owner of transients.. just put it in the
* top of other windows */
frame->stacking->under = curtop;
curtop->stacking->above = frame;
WMSetInBag(scr->stacking_list, index, frame);
}
CommitStacking(scr);
}
/*
*----------------------------------------------------------------------
* MoveInStackListAbove--
* Moves the frame above "next".
*
* Returns:
* None
*
* Side effects:
* Stacking order may be changed.
* Window level for frame may be changed.
*----------------------------------------------------------------------
*/
void MoveInStackListAbove(WCoreWindow * next, WCoreWindow * frame)
{
WCoreWindow *tmpw;
WScreen *scr = frame->screen_ptr;
int index;
if (!next || frame->stacking->under == next)
return;
if (frame->stacking->window_level != next->stacking->window_level)
ChangeStackingLevel(frame, next->stacking->window_level);
index = frame->stacking->window_level;
tmpw = WMGetFromBag(scr->stacking_list, index);
if (tmpw == frame)
WMSetInBag(scr->stacking_list, index, frame->stacking->under);
if (frame->stacking->under)
frame->stacking->under->stacking->above = frame->stacking->above;
if (frame->stacking->above)
frame->stacking->above->stacking->under = frame->stacking->under;
if (next->stacking->above)
next->stacking->above->stacking->under = frame;
frame->stacking->under = next;
frame->stacking->above = next->stacking->above;
next->stacking->above = frame;
if (tmpw == next)
WMSetInBag(scr->stacking_list, index, frame);
/* try to optimize things a little */
if (frame->stacking->above == NULL) {
WCoreWindow *above = NULL;
WMBagIterator iter;
for (above = WMBagIteratorAtIndex(scr->stacking_list, index + 1, &iter);
above != NULL; above = WMBagNext(scr->stacking_list, &iter)) {
/* can't optimize */
while (above->stacking->under)
above = above->stacking->under;
break;
}
if (above == NULL) {
XRaiseWindow(dpy, frame->window);
} else {
moveFrameToUnder(above, frame);
}
} else {
moveFrameToUnder(frame->stacking->above, frame);
}
WMPostNotificationName(WMNResetStacking, scr, NULL);
}
/*
*----------------------------------------------------------------------
* MoveInStackListUnder--
* Moves the frame to under "prev".
*
* Returns:
* None
*
* Side effects:
* Stacking order may be changed.
* Window level for frame may be changed.
*----------------------------------------------------------------------
*/
void MoveInStackListUnder(WCoreWindow * prev, WCoreWindow * frame)
{
WCoreWindow *tmpw;
int index;
WScreen *scr = frame->screen_ptr;
if (!prev || frame->stacking->above == prev)
return;
if (frame->stacking->window_level != prev->stacking->window_level)
ChangeStackingLevel(frame, prev->stacking->window_level);
index = frame->stacking->window_level;
tmpw = WMGetFromBag(scr->stacking_list, index);
if (tmpw == frame)
WMSetInBag(scr->stacking_list, index, frame->stacking->under);
if (frame->stacking->under)
frame->stacking->under->stacking->above = frame->stacking->above;
if (frame->stacking->above)
frame->stacking->above->stacking->under = frame->stacking->under;
if (prev->stacking->under)
prev->stacking->under->stacking->above = frame;
frame->stacking->above = prev;
frame->stacking->under = prev->stacking->under;
prev->stacking->under = frame;
moveFrameToUnder(prev, frame);
WMPostNotificationName(WMNResetStacking, scr, NULL);
}
void RemoveFromStackList(WCoreWindow * frame)
{
int index = frame->stacking->window_level;
if (XDeleteContext(dpy, frame->window, w_global.context.stack) == XCNOENT) {
wwarning("RemoveFromStackingList(): window not in list ");
return;
}
/* remove from the window stack list */
if (frame->stacking->under)
frame->stacking->under->stacking->above = frame->stacking->above;
if (frame->stacking->above)
frame->stacking->above->stacking->under = frame->stacking->under;
else /* this was the first window on the list */
WMSetInBag(frame->screen_ptr->stacking_list, index, frame->stacking->under);
frame->screen_ptr->window_count--;
WMPostNotificationName(WMNResetStacking, frame->screen_ptr, NULL);
}
void ChangeStackingLevel(WCoreWindow * frame, int new_level)
{
int old_level;
if (frame->stacking->window_level == new_level)
return;
old_level = frame->stacking->window_level;
RemoveFromStackList(frame);
frame->stacking->window_level = new_level;
AddToStackList(frame);
if (old_level > new_level) {
wRaiseFrame(frame);
} else {
wLowerFrame(frame);
}
}
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