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Sanity check gaps on the outside of the workspace

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Avoid gaps that are too large around the workspace that you end up
without any usable space for children.

Fixes #4308
This commit is contained in:
Pedro Côrte-Real 2019-07-06 12:45:32 +01:00 committed by Brian Ashworth
parent 99192a92f9
commit 95c444de33
1 changed files with 19 additions and 0 deletions
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19
sway/tree/workspace.c
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@ -706,6 +706,25 @@ void workspace_add_gaps(struct sway_workspace *ws) {
ws->current_gaps.bottom = fmax(0, ws->current_gaps.bottom + ws->gaps_inner);
ws->current_gaps.left = fmax(0, ws->current_gaps.left + ws->gaps_inner);
// Now that we have the total gaps calculated we may need to clamp them in
// case they've made the available area too small
if (ws->width - ws->current_gaps.left - ws->current_gaps.right < MIN_SANE_W
&& ws->current_gaps.left + ws->current_gaps.right > 0) {
int total_gap = fmax(0, ws->width - MIN_SANE_W);
double left_gap_frac = ((double)ws->current_gaps.left /
((double)ws->current_gaps.left + (double)ws->current_gaps.right));
ws->current_gaps.left = left_gap_frac * total_gap;
ws->current_gaps.right = total_gap - ws->current_gaps.left;
}
if (ws->height - ws->current_gaps.top - ws->current_gaps.bottom < MIN_SANE_H
&& ws->current_gaps.top + ws->current_gaps.bottom > 0) {
int total_gap = fmax(0, ws->height - MIN_SANE_H);
double top_gap_frac = ((double) ws->current_gaps.top /
((double)ws->current_gaps.top + (double)ws->current_gaps.bottom));
ws->current_gaps.top = top_gap_frac * total_gap;
ws->current_gaps.bottom = total_gap - ws->current_gaps.top;
}
ws->x += ws->current_gaps.left;
ws->y += ws->current_gaps.top;
ws->width -= ws->current_gaps.left + ws->current_gaps.right;