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workspace: Center window previews horizontally and vertically

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Window previews looks slightly offset to the left and top right now
because we don't use the same padding on all edges of the Workspace. We
do that because the oversize and overlap of the window previews is
different on all sides (for example the bottom overlap is very large
because there we show the window title).

To make sure window previews are always perfectly centered on the
Workspace, only use the largest one of the oversize values as spacing
and padding, and add the larger one of the overlap values for the
vertical padding in addition.

With this, we now center the window previews on the Workspace while
never overpainting the allocation of that Workspace to show overlays.

https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3634

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1670>
This commit is contained in:
Jonas Dreßler 2021-01-14 22:48:15 +01:00 committed by Marge Bot
parent 6f0589313d
commit dda23fc4c6
1 changed files with 11 additions and 6 deletions
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17
js/ui/workspace.js
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@ -467,17 +467,22 @@ var WorkspaceLayout = GObject.registerClass({
const [topOversize, bottomOversize] = window.chromeHeights();
const [leftOversize, rightOversize] = window.chromeWidths();
const oversize =
Math.max(topOversize, bottomOversize, leftOversize, rightOversize);
if (rowSpacing !== null)
rowSpacing += topOversize + bottomOversize;
rowSpacing += oversize;
if (colSpacing !== null)
colSpacing += Math.max(leftOversize, rightOversize);
colSpacing += oversize;
if (containerBox) {
const [topOverlap, bottomOverlap] = window.overlapHeights();
containerBox.x1 += leftOversize;
containerBox.x2 -= rightOversize;
containerBox.y1 += topOversize + topOverlap;
containerBox.y2 -= bottomOversize + bottomOverlap;
const overlap = Math.max(topOverlap, bottomOverlap);
containerBox.x1 += oversize;
containerBox.x2 -= oversize;
containerBox.y1 += oversize + overlap;
containerBox.y2 -= oversize + overlap;
}
return [rowSpacing, colSpacing, containerBox];