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LibWeb: Clamp fit-content widths in flex layout to min/max-width
In situations where we need a width to calculate the intrinsic height of a flex item, we use the fit-content width as a stand-in. However, we also need to clamp it to any min-width and max-width properties present.
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sideshowbarker
2024-07-16 22:13:56 +09:00
Author: https://github.com/awesomekling Commit: https://github.com/SerenityOS/serenity/commit/c0a7a61288 Pull-request: https://github.com/SerenityOS/serenity/pull/18072
@ -0,0 +1,20 @@
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Viewport <#document> at (0,0) content-size 800x600 children: not-inline
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BlockContainer <html> at (1,1) content-size 798x331.570312 children: not-inline
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Box <body.hero> at (2,2) content-size 600x329.570312 flex-container(column) children: not-inline
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BlockContainer <div.header> at (102,3) content-size 400x327.570312 flex-item children: inline
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line 0 width: 340.488281, height: 65.507812, bottom: 65.507812, baseline: 50.742187
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frag 0 from TextNode start: 0, length: 11, rect: [102,3 340.488281x65.507812]
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"This entire"
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line 1 width: 341.25, height: 66.015625, bottom: 131.523437, baseline: 50.742187
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frag 0 from TextNode start: 12, length: 11, rect: [102,68 341.25x65.507812]
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"text should"
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line 2 width: 274.160156, height: 65.523437, bottom: 196.539062, baseline: 50.742187
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frag 0 from TextNode start: 24, length: 8, rect: [102,134 274.160156x65.507812]
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"be on an"
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line 3 width: 204.082031, height: 66.03125, bottom: 262.554687, baseline: 50.742187
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frag 0 from TextNode start: 33, length: 6, rect: [102,199 204.082031x65.507812]
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"orange"
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line 4 width: 351.5625, height: 65.539062, bottom: 327.570312, baseline: 50.742187
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frag 0 from TextNode start: 40, length: 11, rect: [102,265 351.5625x65.507812]
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"background."
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TextNode <#text>
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@ -0,0 +1,22 @@
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<!DOCTYPE html><html><head><style>
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* {
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border: 1px solid black;
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margin: 0;
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padding: 0;
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font: 60px SerenitySans;
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}
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html {
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background: white;
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}
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.hero {
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display: flex;
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flex-direction: column;
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align-items: center;
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width: 600px;
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background: pink;
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}
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.header {
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max-width: 400px;
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background: orange;
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}
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</style></head><body class="hero"><div class="header">This entire text should be on an orange background.</div></body></html>
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@ -1840,6 +1840,16 @@ CSSPixels FlexFormattingContext::calculate_cross_max_content_contribution(FlexIt
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return item.add_cross_margin_box_sizes(clamped_inner_size);
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}
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CSSPixels FlexFormattingContext::calculate_clamped_fit_content_width(Box const& box, AvailableSpace const& available_space) const
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{
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auto const& computed_min_size = box.computed_values().min_width();
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auto const& computed_max_size = box.computed_values().max_width();
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auto clamp_min = (!computed_min_size.is_auto() && (!computed_min_size.contains_percentage())) ? specified_cross_min_size(box) : 0;
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auto clamp_max = (!computed_max_size.is_none() && (!computed_max_size.contains_percentage())) ? specified_cross_max_size(box) : NumericLimits<float>::max();
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auto size = FormattingContext::calculate_fit_content_width(box, available_space);
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return css_clamp(size, clamp_min, clamp_max);
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}
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CSSPixels FlexFormattingContext::calculate_min_content_main_size(FlexItem const& item) const
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{
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if (is_row_layout()) {
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@ -1847,7 +1857,7 @@ CSSPixels FlexFormattingContext::calculate_min_content_main_size(FlexItem const&
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}
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auto available_space = m_state.get(item.box).available_inner_space_or_constraints_from(m_available_space_for_items->space);
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if (available_space.width.is_indefinite()) {
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available_space.width = AvailableSize::make_definite(calculate_fit_content_width(item.box, m_available_space_for_items->space));
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available_space.width = AvailableSize::make_definite(calculate_clamped_fit_content_width(item.box, m_available_space_for_items->space));
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}
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return calculate_min_content_height(item.box, available_space.width);
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}
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@ -1859,7 +1869,7 @@ CSSPixels FlexFormattingContext::calculate_max_content_main_size(FlexItem const&
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}
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auto available_space = m_state.get(item.box).available_inner_space_or_constraints_from(m_available_space_for_items->space);
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if (available_space.width.is_indefinite()) {
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available_space.width = AvailableSize::make_definite(calculate_fit_content_width(item.box, m_available_space_for_items->space));
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available_space.width = AvailableSize::make_definite(calculate_clamped_fit_content_width(item.box, m_available_space_for_items->space));
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}
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return calculate_max_content_height(item.box, available_space.width);
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}
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@ -1883,7 +1893,7 @@ CSSPixels FlexFormattingContext::calculate_min_content_cross_size(FlexItem const
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if (is_row_layout()) {
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auto available_space = m_state.get(item.box).available_inner_space_or_constraints_from(m_available_space_for_flex_container->space);
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if (available_space.width.is_indefinite()) {
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available_space.width = AvailableSize::make_definite(calculate_fit_content_width(item.box, m_available_space_for_items->space));
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available_space.width = AvailableSize::make_definite(calculate_clamped_fit_content_width(item.box, m_available_space_for_items->space));
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}
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return calculate_min_content_height(item.box, available_space.width);
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}
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@ -1895,7 +1905,7 @@ CSSPixels FlexFormattingContext::calculate_max_content_cross_size(FlexItem const
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if (is_row_layout()) {
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auto available_space = m_state.get(item.box).available_inner_space_or_constraints_from(m_available_space_for_flex_container->space);
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if (available_space.width.is_indefinite()) {
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available_space.width = AvailableSize::make_definite(calculate_fit_content_width(item.box, m_available_space_for_items->space));
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available_space.width = AvailableSize::make_definite(calculate_clamped_fit_content_width(item.box, m_available_space_for_items->space));
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}
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return calculate_max_content_height(item.box, available_space.width);
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}
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@ -207,6 +207,8 @@ private:
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[[nodiscard]] CSSPixels calculate_fit_content_main_size(FlexItem const&) const;
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[[nodiscard]] CSSPixels calculate_fit_content_cross_size(FlexItem const&) const;
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CSSPixels calculate_clamped_fit_content_width(Box const&, AvailableSpace const&) const;
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virtual void parent_context_did_dimension_child_root_box() override;
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CSS::FlexBasisData used_flex_basis_for_item(FlexItem const&) const;
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