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LibWeb: Use preferred flex item sizes as min/max-content contribution

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When a flex item has a specific preferred size, that size should be its
contribution to the containers intrinsic sizes.

This fixes an issue on Patreon where the logo would cover the entire
viewport since the SVG had a large intrinsic size but the flex item
containing it had a small specified size in CSS.
This commit is contained in:
Andreas Kling 2022-11-05 11:38:28 +01:00
parent ea7ce76d20
commit 7809cc6557
Notes: sideshowbarker 2024-07-17 04:46:34 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/7809cc6557
3 changed files with 49 additions and 14 deletions
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22
Base/res/html/misc/flex-item-preferred-size-should-be-intrinsic-size-contribution.html Normal file
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@ -0,0 +1,22 @@
<!DOCTYPE html><html><head><style>
html {
background: white;
}
.flexbox {
display: flex;
background: pink;
}
svg {
background: orange;
height: 50px;
width: 50px;
}
</style></head><body class="flexbox"><svg
width="569px"
height="546px"
viewBox="0 0 569 546"
><circle
cx="362.589996"
cy="204.589996"
r="204.589996"
></circle></svg>

38
Userland/Libraries/LibWeb/Layout/FlexFormattingContext.cpp
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@ -1737,14 +1737,26 @@ float FlexFormattingContext::calculate_main_max_content_contribution(FlexItem co
return item.add_main_margin_box_sizes(clamped_inner_size);
}
bool FlexFormattingContext::should_treat_main_size_as_auto(Box const& box) const
{
if (is_row_layout())
return should_treat_width_as_auto(box, m_available_space_for_items->space);
return should_treat_height_as_auto(box, m_available_space_for_items->space);
}
bool FlexFormattingContext::should_treat_cross_size_as_auto(Box const& box) const
{
if (is_row_layout())
return should_treat_height_as_auto(box, m_available_space_for_items->space);
return should_treat_width_as_auto(box, m_available_space_for_items->space);
}
float FlexFormattingContext::calculate_cross_min_content_contribution(FlexItem const& item, bool resolve_percentage_min_max_sizes) const
{
auto larger_size = [&] {
auto inner_min_content_size = calculate_min_content_cross_size(item);
if (computed_cross_size(item.box).is_auto())
return inner_min_content_size;
auto inner_preferred_size = !is_row_layout() ? get_pixel_width(item.box, computed_cross_size(item.box)) : get_pixel_height(item.box, computed_cross_size(item.box));
return max(inner_min_content_size, inner_preferred_size);
auto size = [&] {
if (should_treat_cross_size_as_auto(item.box))
return calculate_min_content_cross_size(item);
return !is_row_layout() ? get_pixel_width(item.box, computed_cross_size(item.box)) : get_pixel_height(item.box, computed_cross_size(item.box));
}();
auto const& computed_min_size = this->computed_cross_min_size(item.box);
@ -1753,19 +1765,17 @@ float FlexFormattingContext::calculate_cross_min_content_contribution(FlexItem c
auto clamp_min = (!computed_min_size.is_auto() && (resolve_percentage_min_max_sizes || !computed_min_size.contains_percentage())) ? specified_cross_min_size(item.box) : 0;
auto clamp_max = (!computed_max_size.is_none() && (resolve_percentage_min_max_sizes || !computed_max_size.contains_percentage())) ? specified_cross_max_size(item.box) : NumericLimits<float>::max();
auto clamped_inner_size = css_clamp(larger_size, clamp_min, clamp_max);
auto clamped_inner_size = css_clamp(size, clamp_min, clamp_max);
return item.add_cross_margin_box_sizes(clamped_inner_size);
}
float FlexFormattingContext::calculate_cross_max_content_contribution(FlexItem const& item, bool resolve_percentage_min_max_sizes) const
{
auto larger_size = [&] {
auto inner_max_content_size = calculate_max_content_cross_size(item);
if (computed_cross_size(item.box).is_auto())
return inner_max_content_size;
auto inner_preferred_size = !is_row_layout() ? get_pixel_width(item.box, computed_cross_size(item.box)) : get_pixel_height(item.box, computed_cross_size(item.box));
return max(inner_max_content_size, inner_preferred_size);
auto size = [&] {
if (should_treat_cross_size_as_auto(item.box))
return calculate_max_content_cross_size(item);
return !is_row_layout() ? get_pixel_width(item.box, computed_cross_size(item.box)) : get_pixel_height(item.box, computed_cross_size(item.box));
}();
auto const& computed_min_size = this->computed_cross_min_size(item.box);
@ -1774,7 +1784,7 @@ float FlexFormattingContext::calculate_cross_max_content_contribution(FlexItem c
auto clamp_min = (!computed_min_size.is_auto() && (resolve_percentage_min_max_sizes || !computed_min_size.contains_percentage())) ? specified_cross_min_size(item.box) : 0;
auto clamp_max = (!computed_max_size.is_none() && (resolve_percentage_min_max_sizes || !computed_max_size.contains_percentage())) ? specified_cross_max_size(item.box) : NumericLimits<float>::max();
auto clamped_inner_size = css_clamp(larger_size, clamp_min, clamp_max);
auto clamped_inner_size = css_clamp(size, clamp_min, clamp_max);
return item.add_cross_margin_box_sizes(clamped_inner_size);
}

3
Userland/Libraries/LibWeb/Layout/FlexFormattingContext.h
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@ -30,6 +30,9 @@ public:
virtual Gfx::FloatPoint calculate_static_position(Box const&) const override;
private:
[[nodiscard]] bool should_treat_main_size_as_auto(Box const&) const;
[[nodiscard]] bool should_treat_cross_size_as_auto(Box const&) const;
void dump_items() const;
struct DirectionAgnosticMargins {