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LibWeb: Vertically align HTML Button content
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3 changed files with 125 additions and 21 deletions
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@ -18,6 +18,7 @@
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#include <LibWeb/DOM/ParentNode.h>
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#include <LibWeb/DOM/ShadowRoot.h>
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#include <LibWeb/Dump.h>
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#include <LibWeb/HTML/HTMLButtonElement.h>
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#include <LibWeb/HTML/HTMLInputElement.h>
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#include <LibWeb/HTML/HTMLProgressElement.h>
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#include <LibWeb/Layout/ListItemBox.h>
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@ -219,6 +220,27 @@ ErrorOr<void> TreeBuilder::create_pseudo_element_if_needed(DOM::Element& element
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return {};
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}
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static bool is_ignorable_whitespace(Layout::Node const& node)
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{
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if (node.is_text_node() && static_cast<TextNode const&>(node).text_for_rendering().is_whitespace())
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return true;
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if (node.is_anonymous() && node.is_block_container() && static_cast<BlockContainer const&>(node).children_are_inline()) {
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bool contains_only_white_space = true;
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node.for_each_in_inclusive_subtree_of_type<TextNode>([&contains_only_white_space](auto& text_node) {
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if (!text_node.text_for_rendering().is_whitespace()) {
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contains_only_white_space = false;
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return IterationDecision::Break;
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}
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return IterationDecision::Continue;
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});
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if (contains_only_white_space)
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return true;
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}
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return false;
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}
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ErrorOr<void> TreeBuilder::create_layout_tree(DOM::Node& dom_node, TreeBuilder::Context& context)
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{
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JS::GCPtr<Layout::Node> layout_node;
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@ -350,6 +372,46 @@ ErrorOr<void> TreeBuilder::create_layout_tree(DOM::Node& dom_node, TreeBuilder::
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}
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}
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// https://html.spec.whatwg.org/multipage/rendering.html#button-layout
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// If the element is an input element, or if it is a button element and its computed value for
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// 'display' is not 'inline-grid', 'grid', 'inline-flex', or 'flex', then the element's box has
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// a child anonymous button content box with the following behaviors:
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if (is<HTML::HTMLButtonElement>(dom_node) && !display.is_grid_inside() && !display.is_flex_inside()) {
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auto& parent = *dom_node.layout_node();
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// If the box does not overflow in the vertical axis, then it is centered vertically.
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auto table_computed_values = CSS::ComputedValues();
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static_cast<CSS::MutableComputedValues&>(table_computed_values).set_display(CSS::Display::from_short(CSS::Display::Short::Table));
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static_cast<CSS::MutableComputedValues&>(table_computed_values).set_height(CSS::Size::make_percentage(CSS::Percentage(100)));
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auto cell_computed_values = CSS::ComputedValues();
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static_cast<CSS::MutableComputedValues&>(cell_computed_values).set_display(CSS::Display { CSS::Display::Internal::TableCell });
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static_cast<CSS::MutableComputedValues&>(cell_computed_values).set_vertical_align(CSS::VerticalAlign::Middle);
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auto flow_root_computed_values = CSS::ComputedValues();
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static_cast<CSS::MutableComputedValues&>(flow_root_computed_values).set_width(CSS::Size::make_percentage(CSS::Percentage(100)));
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static_cast<CSS::MutableComputedValues&>(flow_root_computed_values).set_display(CSS::Display::from_short(CSS::Display::Short::InlineBlock));
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auto table_wrapper = parent.heap().template allocate_without_realm<BlockContainer>(parent.document(), nullptr, move(table_computed_values));
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auto cell_wrapper = parent.heap().template allocate_without_realm<BlockContainer>(parent.document(), nullptr, move(cell_computed_values));
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auto flow_root_wrapper = parent.heap().template allocate_without_realm<BlockContainer>(parent.document(), nullptr, move(flow_root_computed_values));
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Vector<JS::Handle<Node>> sequence;
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for (auto child = parent.first_child(); child; child = child->next_sibling()) {
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if (!is_ignorable_whitespace(*child))
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sequence.append(*child);
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}
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for (auto& node : sequence) {
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parent.remove_child(*node);
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flow_root_wrapper->append_child(*node);
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}
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cell_wrapper->append_child(*flow_root_wrapper);
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table_wrapper->append_child(*cell_wrapper);
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parent.append_child(*table_wrapper);
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}
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return {};
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}
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@ -479,27 +541,6 @@ static bool is_not_table_cell(Node const& node)
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return !is_table_cell(node);
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}
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static bool is_ignorable_whitespace(Layout::Node const& node)
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{
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if (node.is_text_node() && static_cast<TextNode const&>(node).text_for_rendering().is_whitespace())
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return true;
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if (node.is_anonymous() && node.is_block_container() && static_cast<BlockContainer const&>(node).children_are_inline()) {
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bool contains_only_white_space = true;
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node.for_each_in_inclusive_subtree_of_type<TextNode>([&contains_only_white_space](auto& text_node) {
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if (!text_node.text_for_rendering().is_whitespace()) {
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contains_only_white_space = false;
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return IterationDecision::Break;
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}
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return IterationDecision::Continue;
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});
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if (contains_only_white_space)
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return true;
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}
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return false;
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}
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template<typename Matcher, typename Callback>
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static void for_each_sequence_of_consecutive_children_matching(NodeWithStyle& parent, Matcher matcher, Callback callback)
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{
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