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LibWeb: Blockify pseudo elements that are flex items

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When deciding on a box type transformation (blockify/inlinify) for a
pseudo element, we have to use the originating element as a reference
rather than the parent.

(The originating element *is* the parent for its pseudo elements.)
This commit is contained in:
Andreas Kling 2023-04-27 15:38:50 +02:00
parent 806e08425a
commit c0b4083b02
Notes: sideshowbarker 2024-07-16 22:11:09 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/c0b4083b02
Pull-request: https://github.com/SerenityOS/serenity/pull/18538
3 changed files with 40 additions and 3 deletions
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19
Tests/LibWeb/Layout/expected/css-pseudo-element-blockification.txt Normal file
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@ -0,0 +1,19 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (0,0) content-size 800x33.46875 children: not-inline
BlockContainer <body> at (8,8) content-size 784x17.46875 children: not-inline
Box <div.foo> at (8,8) content-size 784x17.46875 flex-container(row) children: not-inline
BlockContainer <(anonymous)> at (8,8) content-size 28.40625x17.46875 flex-item children: inline
line 0 width: 28.40625, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 4, rect: [8,8 28.40625x17.46875]
"well"
TextNode <#text>
BlockContainer <(anonymous)> at (46,8) content-size 36.84375x17.46875 flex-item children: inline
line 0 width: 36.84375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 5, rect: [46,8 36.84375x17.46875]
"hello"
TextNode <#text>
BlockContainer <(anonymous)> at (92.4375,8) content-size 55.359375x17.46875 flex-item children: inline
line 0 width: 55.359375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 7, rect: [92.4375,8 55.359375x17.46875]
"friends"
TextNode <#text>

15
Tests/LibWeb/Layout/input/css-pseudo-element-blockification.html Normal file
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@ -0,0 +1,15 @@
<style>
* {
font: 16px SerenitySans;
}
.foo {
display: flex;
gap: 1ch;
}
.foo:before {
content: "well";
}
.foo:after {
content: "friends";
}
</style><div class="foo">hello</div>

9
Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
View File

@ -1425,7 +1425,7 @@ enum class BoxTypeTransformation {
Inlinify,
};
static BoxTypeTransformation required_box_type_transformation(StyleProperties const& style, DOM::Element const& element, Optional<CSS::Selector::PseudoElement> const&)
static BoxTypeTransformation required_box_type_transformation(StyleProperties const& style, DOM::Element const& element, Optional<CSS::Selector::PseudoElement> const& pseudo_element)
{
// Absolute positioning or floating an element blockifies the box’s display type. [CSS2]
if (style.position() == CSS::Position::Absolute || style.position() == CSS::Position::Fixed || style.float_() != CSS::Float::None)
@ -1433,9 +1433,12 @@ static BoxTypeTransformation required_box_type_transformation(StyleProperties co
// FIXME: Containment in a ruby container inlinifies the box’s display type, as described in [CSS-RUBY-1].
// NOTE: If we're computing style for a pseudo-element, the effective parent will be the originating element itself, not its parent.
auto const* parent = pseudo_element.has_value() ? &element : element.parent_element();
// A parent with a grid or flex display value blockifies the box’s display type. [CSS-GRID-1] [CSS-FLEXBOX-1]
if (element.parent_element() && element.parent_element()->computed_css_values()) {
auto const& parent_display = element.parent_element()->computed_css_values()->display();
if (parent && parent->computed_css_values()) {
auto const& parent_display = parent->computed_css_values()->display();
if (parent_display.is_grid_inside() || parent_display.is_flex_inside())
return BoxTypeTransformation::Blockify;
}