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LibWeb: Stop inserting inline nodes into a generated wrapper box

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493dd5d93c caused the `::before`
pseudo-element node to be inserted before the element's content, which
caused issues with how we determine where to insert inline nodes into
the layout tree. At the time, I noticed the issue with contents of flex
containers, and prevented them from merging into a `::before` box.

However, a similar situation happens when we're not in a flex container,
but the pseudo-element has `display: block`. This commit fixes that
situation by using the same logic in both places, so a similar mistake
can't be made again.

This fixes the tab text being invisible on GitHub project pages. :^)
This commit is contained in:
Sam Atkins 2023-10-10 19:27:01 +01:00 committed by Andreas Kling
parent 068f6771ad
commit 1132c858e9
Notes: sideshowbarker 2024-07-17 07:35:03 +09:00 
Author: https://github.com/AtkinsSJ
Commit: https://github.com/SerenityOS/serenity/commit/1132c858e9
Pull-request: https://github.com/SerenityOS/serenity/pull/21403
3 changed files with 40 additions and 10 deletions
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21
Tests/LibWeb/Layout/expected/block-and-inline/inline-node-not-inserted-into-generated-box.txt Normal file
View file

@ -0,0 +1,21 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (0,0) content-size 800x50.9375 [BFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x34.9375 children: not-inline
BlockContainer <(anonymous)> at (8,8) content-size 784x17.46875 children: inline
line 0 width: 27.15625, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 3, rect: [8,8 27.15625x17.46875]
"foo"
TextNode <#text>
BlockContainer <(anonymous)> at (8,25.46875) content-size 784x17.46875 children: inline
line 0 width: 27.640625, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 3, rect: [8,25.46875 27.640625x17.46875]
"bar"
TextNode <#text>
ViewportPaintable (Viewport<#document>) [0,0 800x600]
PaintableWithLines (BlockContainer<HTML>) [0,0 800x50.9375]
PaintableWithLines (BlockContainer<BODY>) [8,8 784x34.9375]
PaintableWithLines (BlockContainer(anonymous)) [8,8 784x17.46875]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer(anonymous)) [8,25.46875 784x17.46875]
TextPaintable (TextNode<#text>)

6
Tests/LibWeb/Layout/input/block-and-inline/inline-node-not-inserted-into-generated-box.html Normal file
View file

@ -0,0 +1,6 @@
<!DOCTYPE html><style>
body::before {
content: "foo";
display: block;
}
</style><body>bar

23
Userland/Libraries/LibWeb/Layout/TreeBuilder.cpp
View file

@ -66,24 +66,27 @@ static bool has_in_flow_block_children(Layout::Node const& layout_node)
static Layout::Node& insertion_parent_for_inline_node(Layout::NodeWithStyle& layout_parent)
{
auto last_child_creating_anonymous_wrapper_if_needed = [](auto& layout_parent) -> Layout::Node& {
if (!layout_parent.last_child()
|| !layout_parent.last_child()->is_anonymous()
|| !layout_parent.last_child()->children_are_inline()
|| layout_parent.last_child()->is_generated()) {
layout_parent.append_child(layout_parent.create_anonymous_wrapper());
}
return *layout_parent.last_child();
};
if (layout_parent.display().is_inline_outside() && layout_parent.display().is_flow_inside())
return layout_parent;
if (layout_parent.display().is_flex_inside() || layout_parent.display().is_grid_inside()) {
if (layout_parent.last_child() && layout_parent.last_child()->is_anonymous() && layout_parent.last_child()->children_are_inline() && !layout_parent.last_child()->is_generated())
return *layout_parent.last_child();
layout_parent.append_child(layout_parent.create_anonymous_wrapper());
return *layout_parent.last_child();
}
if (layout_parent.display().is_flex_inside() || layout_parent.display().is_grid_inside())
return last_child_creating_anonymous_wrapper_if_needed(layout_parent);
if (!has_in_flow_block_children(layout_parent) || layout_parent.children_are_inline())
return layout_parent;
// Parent has block-level children, insert into an anonymous wrapper block (and create it first if needed)
if (!layout_parent.last_child()->is_anonymous() || !layout_parent.last_child()->children_are_inline()) {
layout_parent.append_child(layout_parent.create_anonymous_wrapper());
}
return *layout_parent.last_child();
return last_child_creating_anonymous_wrapper_if_needed(layout_parent);
}
static Layout::Node& insertion_parent_for_block_node(Layout::NodeWithStyle& layout_parent, Layout::Node& layout_node)