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LibWeb+WebContent: Forbid access to underlying type of CSSPixels

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Although DistinctNumeric, which is supposed to abstract the underlying
type, was used to represent CSSPixels, we have a whole bunch of places
in the layout code that assume CSSPixels::value() returns a
floating-point type. This assumption makes it difficult to replace the
underlying type in CSSPixels with a non-floating type.

To make it easier to transition CSSPixels to fixed-point math, one step
we can take is to prevent access to the underlying type using value()
and instead use explicit conversions with the to_float(), to_double(),
and to_int() methods.
This commit is contained in:
Aliaksandr Kalenik 2023-06-12 21:37:35 +03:00 • committed by Andreas Kling
parent 5a54c686a7
commit 147c3b3d97
43 changed files with 340 additions and 220 deletions
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12
Userland/Libraries/LibWeb/Layout/GridFormattingContext.cpp
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@ -119,7 +119,7 @@ int GridFormattingContext::count_of_repeated_auto_fill_or_fit_tracks(Vector<CSS:
sum_of_grid_track_sizes += min(resolve_definite_track_size(track_sizing_function.grid_size(), available_space), resolve_definite_track_size(track_sizing_function.grid_size(), available_space));
}
}
return max(1, static_cast<int>((get_free_space(available_space, GridDimension::Column).to_px() / sum_of_grid_track_sizes).value()));
return max(1, static_cast<int>((get_free_space(available_space, GridDimension::Column).to_px() / sum_of_grid_track_sizes).to_double()));
// For the purpose of finding the number of auto-repeated tracks in a standalone axis, the UA must
// floor the track size to a UA-specified value to avoid division by zero. It is suggested that this
@ -800,7 +800,7 @@ void GridFormattingContext::resolve_intrinsic_track_sizes(AvailableSpace const&
// 5. If any track still has an infinite growth limit (because, for example, it had no items placed in
// it or it is a flexible track), set its growth limit to its base size.
for (auto& track : tracks_and_gaps) {
if (!isfinite(track.growth_limit.value())) {
if (!isfinite(track.growth_limit.to_double())) {
track.growth_limit = track.base_size;
}
}
@ -879,7 +879,7 @@ void GridFormattingContext::distribute_extra_space_across_spanned_tracks_growth_
// 1. Find the space to distribute:
CSSPixels spanned_tracks_sizes_sum = 0;
for (auto& track : spanned_tracks) {
if (isfinite(track.growth_limit.value())) {
if (isfinite(track.growth_limit.to_double())) {
spanned_tracks_sizes_sum += track.growth_limit;
} else {
spanned_tracks_sizes_sum += track.base_size;
@ -1005,7 +1005,7 @@ void GridFormattingContext::increase_sizes_to_accommodate_spanning_items_crossin
return track.max_track_sizing_function.is_intrinsic(available_size);
});
for (auto& track : spanned_tracks) {
if (!isfinite(track.growth_limit.value())) {
if (!isfinite(track.growth_limit.to_double())) {
// If the affected size is an infinite growth limit, set it to the track’s base size plus the planned increase.
track.growth_limit = track.base_size + track.planned_increase;
// Mark any tracks whose growth limit changed from infinite to finite in this step as infinitely growable
@ -1025,7 +1025,7 @@ void GridFormattingContext::increase_sizes_to_accommodate_spanning_items_crossin
return track.max_track_sizing_function.is_max_content() || track.max_track_sizing_function.is_auto(available_size);
});
for (auto& track : spanned_tracks) {
if (!isfinite(track.growth_limit.value())) {
if (!isfinite(track.growth_limit.to_double())) {
// If the affected size is an infinite growth limit, set it to the track’s base size plus the planned increase.
track.growth_limit = track.base_size + track.planned_increase;
} else {
@ -1098,7 +1098,7 @@ void GridFormattingContext::maximize_tracks(AvailableSpace const& available_spac
while (free_space_px > 0) {
auto free_space_to_distribute_per_track = free_space_px / tracks.size();
for (auto& track : tracks) {
VERIFY(isfinite(track.growth_limit.value()));
VERIFY(isfinite(track.growth_limit.to_double()));
track.base_size = min(track.growth_limit, track.base_size + free_space_to_distribute_per_track);
}
if (get_free_space_px() == free_space_px)