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Prevent border drifting.

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Windows were drifting by FRAME_BORDER_WIDTH pixels when their
borders were toggled on or off.

Windows which had a border before we managed them were drifting
on shutdown and again at startup.  It happened because the absolute
upper-left co-ordinates of a bordered window would in fact be the
upper-left co-ordinates of the border itself, whereas we consider
the client window to have no border and co-ordinates offset by the
titlebar and frame border.
This commit is contained in:
Iain Patterson
2012-11-16 16:00:07 -08:00
committed by Carlos R. Mafra
parent 4e193c172b
commit df601267e6
2 changed files with 24 additions and 5 deletions
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27
src/window.c
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@@ -1178,6 +1178,17 @@ WWindow *wManageWindow(WScreen *scr, Window window)
}
}
/* If this is a newly-mapped window which had a border,
* the absolute co-ordinates reported to us are actually
* the co-ordinates of the border. We, however, track
* the absolute co-ordinates of the client window, offset
* by the title bar and frame border. As a result
* we need to offset placement of the client by the border
* size so its position matches what we expect.
*/
x += wwin->old_border_width;
y += wwin->old_border_width;
/*
* wWindowConfigure() will init the client window's size
* (wwin->client.{width,height}) and all other geometry
@@ -2226,7 +2237,9 @@ void wWindowConfigureBorders(WWindow *wwin)
{
if (wwin->frame) {
int flags;
int newy, oldh;
int newx, newy, oldh;
int border_width;
XWindowAttributes attr;
flags = WFF_LEFT_BUTTON | WFF_RIGHT_BUTTON;
@@ -2244,13 +2257,17 @@ void wWindowConfigureBorders(WWindow *wwin)
if (wwin->flags.shaded)
flags |= WFF_IS_SHADED;
oldh = wwin->frame->top_width;
if (!XGetWindowAttributes(dpy, wwin->frame->core->window, &attr))
attr.border_width = 0;
border_width = (flags & WFF_BORDER) ? FRAME_BORDER_WIDTH : 0;
oldh = wwin->frame->top_width + attr.border_width;
wFrameWindowUpdateBorders(wwin->frame, flags);
if (oldh != wwin->frame->top_width) {
newy = wwin->frame_y + oldh - wwin->frame->top_width;
if (oldh != wwin->frame->top_width + border_width) {
newx = wwin->frame_x + attr.border_width - border_width;
newy = wwin->frame_y + oldh - border_width - wwin->frame->top_width;
XMoveWindow(dpy, wwin->client_win, 0, wwin->frame->top_width);
wWindowConfigure(wwin, wwin->frame_x, newy, wwin->client.width, wwin->client.height);
wWindowConfigure(wwin, newx, newy, wwin->client.width, wwin->client.height);
}
flags = 0;