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https://github.com/RGBCube/serenity
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LibWeb: Bring sizing of replaced elements closer to spec
We were prematurely resolving the computed size values, which meant that `auto` values were swallowed before we could resolve them via the intrinsic aspect ratio (if present)
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67de1131b9
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327938c945
2 changed files with 23 additions and 24 deletions
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@ -327,13 +327,13 @@ float FormattingContext::compute_auto_height_for_block_formatting_context_root(F
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}
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// 10.3.2 Inline, replaced elements, https://www.w3.org/TR/CSS22/visudet.html#inline-replaced-width
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float FormattingContext::tentative_width_for_replaced_element(FormattingState const& state, ReplacedBox const& box, CSS::Length const& computed_width)
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float FormattingContext::tentative_width_for_replaced_element(FormattingState const& state, ReplacedBox const& box, CSS::LengthPercentage const& computed_width)
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{
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auto const& containing_block = *box.containing_block();
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auto height_of_containing_block = CSS::Length::make_px(state.get(containing_block).content_height);
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auto computed_height = box.computed_values().height().resolved(box, height_of_containing_block).resolved(box);
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float used_width = computed_width.to_px(box);
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float used_width = computed_width.resolved(box, CSS::Length::make_px(containing_block_width_for(box, state))).to_px(box);
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// If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic width,
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// then that intrinsic width is the used value of 'width'.
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@ -347,7 +347,7 @@ float FormattingContext::tentative_width_for_replaced_element(FormattingState co
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//
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// (used height) * (intrinsic ratio)
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if ((computed_height.is_auto() && computed_width.is_auto() && !box.has_intrinsic_width() && box.has_intrinsic_height() && box.has_intrinsic_aspect_ratio())
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|| (computed_width.is_auto() && box.has_intrinsic_aspect_ratio())) {
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|| (computed_width.is_auto() && !computed_height.is_auto() && box.has_intrinsic_aspect_ratio())) {
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return compute_height_for_replaced_element(state, box) * box.intrinsic_aspect_ratio().value();
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}
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@ -401,26 +401,26 @@ float FormattingContext::compute_width_for_replaced_element(FormattingState cons
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if (margin_right.is_auto())
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margin_right = zero_value;
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auto specified_width = box.computed_values().width().resolved(box, width_of_containing_block_as_length).resolved(box);
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auto computed_width = box.computed_values().width();
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// 1. The tentative used width is calculated (without 'min-width' and 'max-width')
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auto used_width = tentative_width_for_replaced_element(state, box, specified_width);
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auto used_width = tentative_width_for_replaced_element(state, box, computed_width);
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// 2. The tentative used width is greater than 'max-width', the rules above are applied again,
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// but this time using the computed value of 'max-width' as the computed value for 'width'.
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auto specified_max_width = box.computed_values().max_width().resolved(box, width_of_containing_block_as_length).resolved(box);
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if (!specified_max_width.is_auto()) {
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if (used_width > specified_max_width.to_px(box)) {
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used_width = tentative_width_for_replaced_element(state, box, specified_max_width);
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auto computed_max_width = box.computed_values().max_width();
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if (!computed_max_width.is_auto()) {
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if (used_width > computed_max_width.resolved(box, width_of_containing_block_as_length).to_px(box)) {
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used_width = tentative_width_for_replaced_element(state, box, computed_max_width);
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}
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}
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// 3. If the resulting width is smaller than 'min-width', the rules above are applied again,
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// but this time using the value of 'min-width' as the computed value for 'width'.
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auto specified_min_width = box.computed_values().min_width().resolved(box, width_of_containing_block_as_length).resolved(box);
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if (!specified_min_width.is_auto()) {
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if (used_width < specified_min_width.to_px(box)) {
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used_width = tentative_width_for_replaced_element(state, box, specified_min_width);
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auto computed_min_width = box.computed_values().min_width();
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if (!computed_min_width.is_auto()) {
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if (used_width < computed_min_width.resolved(box, width_of_containing_block_as_length).to_px(box)) {
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used_width = tentative_width_for_replaced_element(state, box, computed_min_width);
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}
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}
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@ -429,10 +429,9 @@ float FormattingContext::compute_width_for_replaced_element(FormattingState cons
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// 10.6.2 Inline replaced elements, block-level replaced elements in normal flow, 'inline-block' replaced elements in normal flow and floating replaced elements
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// https://www.w3.org/TR/CSS22/visudet.html#inline-replaced-height
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float FormattingContext::tentative_height_for_replaced_element(FormattingState const& state, ReplacedBox const& box, CSS::Length const& computed_height)
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float FormattingContext::tentative_height_for_replaced_element(FormattingState const& state, ReplacedBox const& box, CSS::LengthPercentage const& computed_height)
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{
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auto width_of_containing_block_as_length = CSS::Length::make_px(containing_block_width_for(box, state));
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auto computed_width = box.computed_values().width().resolved(box, width_of_containing_block_as_length).resolved(box);
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auto computed_width = box.computed_values().width();
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// If 'height' and 'width' both have computed values of 'auto' and the element also has
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// an intrinsic height, then that intrinsic height is the used value of 'height'.
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@ -455,7 +454,7 @@ float FormattingContext::tentative_height_for_replaced_element(FormattingState c
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if (computed_height.is_auto())
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return 150;
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return computed_height.to_px(box);
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return computed_height.resolved(box, CSS::Length::make_px(containing_block_height_for(box, state))).to_px(box);
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}
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float FormattingContext::compute_height_for_replaced_element(FormattingState const& state, ReplacedBox const& box)
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@ -465,13 +464,13 @@ float FormattingContext::compute_height_for_replaced_element(FormattingState con
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auto width_of_containing_block_as_length = CSS::Length::make_px(containing_block_width_for(box, state));
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auto height_of_containing_block_as_length = CSS::Length::make_px(containing_block_height_for(box, state));
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auto specified_width = box.computed_values().width().resolved(box, width_of_containing_block_as_length).resolved(box);
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auto specified_height = box.computed_values().height().resolved(box, height_of_containing_block_as_length).resolved(box);
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auto computed_width = box.computed_values().width();
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auto computed_height = box.computed_values().height();
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float used_height = tentative_height_for_replaced_element(state, box, specified_height);
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float used_height = tentative_height_for_replaced_element(state, box, computed_height);
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if (specified_width.is_auto() && specified_height.is_auto() && box.has_intrinsic_aspect_ratio()) {
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float w = tentative_width_for_replaced_element(state, box, specified_width);
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if (computed_width.is_auto() && computed_height.is_auto() && box.has_intrinsic_aspect_ratio()) {
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float w = tentative_width_for_replaced_element(state, box, computed_width);
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float h = used_height;
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used_height = solve_replaced_size_constraint(state, w, h, box).height();
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}
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