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LibWeb: Fix divisions by zero in FFC and GFC

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This is the preparation to use fixed-point to represent CSSPixels.
Previously, it was acceptable to divide CSSPixels by zero, resulting
in inf, but after migrating to fixed-point stored as an integer, it
would lead to undefined behavior.
This commit is contained in:
Aliaksandr Kalenik 2023-07-24 13:16:25 +02:00 • committed by Andreas Kling
parent d216621d2a
commit 5cdd03fc53
2 changed files with 7 additions and 1 deletions
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6
Userland/Libraries/LibWeb/Layout/GridFormattingContext.cpp
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@ -785,6 +785,9 @@ void GridFormattingContext::distribute_extra_space_across_spanned_tracks_base_si
affected_tracks.append(track);
}
if (affected_tracks.size() == 0)
return;
for (auto& track : affected_tracks)
track.item_incurred_increase = 0;
@ -870,6 +873,9 @@ void GridFormattingContext::distribute_extra_space_across_spanned_tracks_growth_
for (auto& track : affected_tracks)
track.item_incurred_increase = 0;
if (affected_tracks.size() == 0)
return;
// 1. Find the space to distribute:
CSSPixels spanned_tracks_sizes_sum = 0;
for (auto& track : spanned_tracks) {