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@@ -660,9 +660,12 @@ void FormattingContext::compute_height_for_absolutely_positioned_non_replaced_el
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auto height_of_containing_block = available_space.height.to_px();
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auto height_of_containing_block_as_length = CSS::Length::make_px(height_of_containing_block);
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- auto solve_for = [&](CSS::Length length) {
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- return CSS::Length::make_px(
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- height_of_containing_block
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+ enum class ClampToZero {
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+ No,
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+ Yes,
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+ };
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+ auto solve_for = [&](CSS::Length length, ClampToZero clamp_to_zero = ClampToZero::No) {
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+ auto unclamped_value = height_of_containing_block
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- top.resolved(box, height_of_containing_block_as_length).to_px(box)
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- margin_top.resolved(box, width_of_containing_block_as_length).to_px(box)
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- box.computed_values().border_top().width
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@@ -672,7 +675,10 @@ void FormattingContext::compute_height_for_absolutely_positioned_non_replaced_el
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- box.computed_values().border_bottom().width
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- margin_bottom.resolved(box, width_of_containing_block_as_length).to_px(box)
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- bottom.resolved(box, height_of_containing_block_as_length).to_px(box)
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- + length.to_px(box));
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+ + length.to_px(box);
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+ if (clamp_to_zero == ClampToZero::Yes)
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+ return CSS::Length::make_px(max(CSSPixels(0), unclamped_value));
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+ return CSS::Length::make_px(unclamped_value);
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};
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auto solve_for_top = [&] {
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@@ -684,7 +690,7 @@ void FormattingContext::compute_height_for_absolutely_positioned_non_replaced_el
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};
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auto solve_for_height = [&] {
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- height = CSS::Size::make_length(solve_for(height.resolved(box, height_of_containing_block_as_length)));
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+ height = CSS::Size::make_length(solve_for(height.resolved(box, height_of_containing_block_as_length), ClampToZero::Yes));
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};
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auto solve_for_margin_top = [&] {
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Andreas Kling