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LibWeb: Make button layout wrappers inherit styles correctly

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There are some nuances to creating these wrappers, such as manually
propagating certain text styles that are not inherited by default. We
already have the logic for this in
`NodeWithStyle::create_anonymous_wrapper()`, so reuse that method in our
implementation of the button layout.

Fixes applying certain text styles (such as `text-decoration`) to the
text of a `<button>`.
This commit is contained in:
Jelle Raaijmakers 2025-08-18 12:45:04 +02:00 • committed by Jelle Raaijmakers
commit 9e29d0c040
Notes: github-actions[bot] 2025-08-19 09:13:29 +00:00
5 changed files with 36 additions and 15 deletions
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23
Libraries/LibWeb/Layout/TreeBuilder.cpp
View file

@ -734,27 +734,24 @@ void TreeBuilder::wrap_in_button_layout_tree_if_needed(DOM::Node& dom_node, GC::
// with the following behaviors:
auto display = layout_node->display();
if (!display.is_grid_inside() && !display.is_flex_inside()) {
auto& parent = *layout_node;
auto& parent = as<NodeWithStyle>(*layout_node);
// If the box does not overflow in the vertical axis, then it is centered vertically.
// FIXME: Only apply alignment when box overflows
auto flex_computed_values = parent.computed_values().clone_inherited_values();
auto& mutable_flex_computed_values = static_cast<CSS::MutableComputedValues&>(*flex_computed_values);
mutable_flex_computed_values.set_display(CSS::Display { CSS::DisplayOutside::Block, CSS::DisplayInside::Flex });
mutable_flex_computed_values.set_justify_content(CSS::JustifyContent::Center);
mutable_flex_computed_values.set_flex_direction(CSS::FlexDirection::Column);
mutable_flex_computed_values.set_height(CSS::Size::make_percentage(CSS::Percentage(100)));
mutable_flex_computed_values.set_min_height(parent.computed_values().min_height());
auto flex_wrapper = parent.heap().template allocate<BlockContainer>(parent.document(), nullptr, move(flex_computed_values));
auto flex_wrapper = parent.create_anonymous_wrapper();
auto& flex_computed_values = flex_wrapper->mutable_computed_values();
flex_computed_values.set_display(CSS::Display { CSS::DisplayOutside::Block, CSS::DisplayInside::Flex });
flex_computed_values.set_justify_content(CSS::JustifyContent::Center);
flex_computed_values.set_flex_direction(CSS::FlexDirection::Column);
flex_computed_values.set_height(CSS::Size::make_percentage(CSS::Percentage(100)));
flex_computed_values.set_min_height(parent.computed_values().min_height());
auto content_box_computed_values = parent.computed_values().clone_inherited_values();
auto content_box_wrapper = parent.heap().template allocate<BlockContainer>(parent.document(), nullptr, move(content_box_computed_values));
auto content_box_wrapper = parent.create_anonymous_wrapper();
content_box_wrapper->set_children_are_inline(parent.children_are_inline());
Vector<GC::Root<Node>> sequence;
for (auto child = parent.first_child(); child; child = child->next_sibling()) {
for (auto child = parent.first_child(); child; child = child->next_sibling())
sequence.append(*child);
}
for (auto& node : sequence) {
parent.remove_child(*node);

2
Tests/LibWeb/Layout/expected/block-and-inline/button-empty.txt
View file

@ -4,7 +4,7 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
frag 0 from BlockContainer start: 0, length: 0, rect: [13,19 0x0] baseline: 4
BlockContainer <button> at (13,19) content-size 0x0 inline-block [BFC] children: not-inline
BlockContainer <(anonymous)> at (13,19) content-size 0x0 flex-container(column) [FFC] children: not-inline
BlockContainer <(anonymous)> at (13,19) content-size 0x0 [BFC] children: not-inline
BlockContainer <(anonymous)> at (13,19) content-size 0x0 inline-block [BFC] children: not-inline
ViewportPaintable (Viewport<#document>) [0,0 800x600]
PaintableWithLines (BlockContainer<HTML>) [0,0 800x34]

2
Tests/LibWeb/Layout/expected/popovertarget-button.txt
View file

@ -4,7 +4,7 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
frag 0 from BlockContainer start: 0, length: 0, rect: [13,19 0x0] baseline: 4
BlockContainer <button#button> at (13,19) content-size 0x0 inline-block [BFC] children: not-inline
BlockContainer <(anonymous)> at (13,19) content-size 0x0 flex-container(column) [FFC] children: not-inline
BlockContainer <(anonymous)> at (13,19) content-size 0x0 [BFC] children: not-inline
BlockContainer <(anonymous)> at (13,19) content-size 0x0 inline-block [BFC] children: not-inline
TextNode <#text>
TextNode <#text>
TextNode <#text>

11
Tests/LibWeb/Text/expected/display_list/button-with-text-decoration.txt Normal file
View file

@ -0,0 +1,11 @@
SaveLayer
PushStackingContext opacity=1 isolate=false has_clip_path=false transform=[1 0 0 1 0 0]
PushStackingContext opacity=1 isolate=false has_clip_path=false transform=[1 0 0 1 0 0]
FillRect rect=[8,8 106x22] color=rgb(212, 208, 200)
FillPath
DrawGlyphRun rect=[13,10 96x18] translation=[13,23.796875] color=rgb(0, 0, 0) scale=1
DrawLine from=[13,26] to=[108,26] color=rgb(0, 0, 0) thickness=2
PopStackingContext
PopStackingContext
Restore

13
Tests/LibWeb/Text/input/display_list/button-with-text-decoration.html Normal file
View file

@ -0,0 +1,13 @@
<!DOCTYPE html>
<script src="../include.js"></script>
<style>
button {
text-decoration: underline;
}
</style>
<button>foo the bar</button>
<script>
test(() => {
println(internals.dumpDisplayList());
});
</script>