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Sort the stack by distance and then mru

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O(`max`*`space.length`) ~ O(`space.length`) for finitely wide screens. Doesn't
seem like there's a large performance penalty to decide ties between
equidistant windows using the mru, instead of deciding ties by sorting on
left/right.
This commit is contained in:
Tor Hedin Brønner
2018-02-17 21:16:27 +01:00
parent 63a223ec32
commit 4d9c75ca71
1 changed files with 26 additions and 12 deletions
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tiling.js
+26 -12
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@@ -345,6 +345,7 @@ function move_to(space, meta_window, { x, y, delay, transition,
let frame = meta_window.get_frame_rect();
propogate_forward(space, index + 1, x + frame.width + window_gap);
propogate_backward(space, index - 1, x - window_gap);
fixStack(space, index);
}
const DIRECTION = {
@@ -512,6 +513,31 @@ function focus_handler(meta_window, user_data) {
ensure_viewport(space, meta_window);
}
/**
We need to stack windows in mru order, since mutter picks from the
stack, not the mru, when auto choosing focus after closing a window.
*/
function fixStack(space, around) {
let topLeft = space.topOfLeftStack();
let topRight = space.topOfRightStack();
let left = topLeft !== null ? space.indexOf(topLeft) : 0;
let right = topRight !== null ? space.indexOf(topRight) : space.length - 1;
let max = Math.max(Math.abs(around - left), Math.abs(around - right));
let mru = global.display.get_tab_list(Meta.TabList.NORMAL,
space.workspace);
for (let i=max; i >= 0; i--) {
let leftWindow = space[around - i];
let rightWindow = space[around + i];
mru.filter(w => w === leftWindow || w === rightWindow)
.reverse()
.forEach(w => w && w.raise());
}
}
// Place window's left edge at x
function propogate_forward(space, n, x, gap) {
if (n < 0 || n >= space.length) {
@@ -526,13 +552,6 @@ function propogate_forward(space, n, x, gap) {
stackWindow(space, i, DIRECTION.Right);
}
StackOverlay.rightOverlay.setTarget(meta_window);
// Set stack levels in the correct order, as the the "highest" window
// will have priority when handing out focus
let selected = space.selectedIndex();
for (let i=n; i > selected; i--) {
space[i].raise();
}
return;
}
meta_window._isStacked = false;
@@ -563,11 +582,6 @@ function propogate_backward(space, n, x, gap) {
stackWindow(space, i, DIRECTION.Left);
}
StackOverlay.leftOverlay.setTarget(meta_window);
let selected = space.selectedIndex();
for (let i=n; i <= selected; i++) {
space[i].raise();
}
return;
}
meta_window._isStacked = false;