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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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6
Userland/Libraries/LibWeb/Layout/FlexFormattingContext.cpp
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@ -1037,7 +1037,7 @@ void FlexFormattingContext::resolve_flexible_lengths_for_line(FlexLine& line)
for (auto& item : line.items) {
if (item.frozen)
continue;
item.scaled_flex_shrink_factor = item.flex_factor.value() * item.flex_base_size.value();
item.scaled_flex_shrink_factor = item.flex_factor.value() * item.flex_base_size.to_double();
}
auto sum_of_scaled_flex_shrink_factors_of_all_unfrozen_items_on_line = line.sum_of_scaled_flex_shrink_factor_of_unfrozen_items();
for (auto& item : line.items) {
@ -1123,7 +1123,7 @@ void FlexFormattingContext::resolve_flexible_lengths_for_line(FlexLine& line)
// AD-HOC: Due to the way we calculate the remaining free space, it can be infinite when sizing
// under a max-content constraint. In that case, we can simply set it to zero here.
if (!isfinite(line.remaining_free_space.value()))
if (!isfinite(line.remaining_free_space.to_double()))
line.remaining_free_space = 0;
// 6. Set each item’s used main size to its target main size.
@ -1704,7 +1704,7 @@ CSSPixels FlexFormattingContext::calculate_intrinsic_main_size_of_flex_container
result /= item.scaled_flex_shrink_factor;
}
item.desired_flex_fraction = result.value();
item.desired_flex_fraction = result.to_double();
}
// 2. Place all flex items into lines of infinite length.