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LibWeb: Fix bogus percentage vertical padding with box-sizing:border-box

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The padding-top and padding-bottom properties are relative to the
*width* of the containing block, not the height.

It's funny how we keep making this same mistake again and again. :^)
This commit is contained in:
Andreas Kling 2023-03-10 11:32:29 +01:00
parent 07f6ee9e73
commit 24d5a9d7df
Notes: sideshowbarker 2024-07-16 23:06:34 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/24d5a9d7df
3 changed files with 42 additions and 2 deletions
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18
Tests/LibWeb/Layout/expected/vertical-padding-relative-to-cb-width.txt Normal file
View file

@ -0,0 +1,18 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (1,1) content-size 798x30 children: not-inline
BlockContainer <body> at (10,10) content-size 780x12 children: not-inline
BlockContainer <(anonymous)> at (10,10) content-size 780x0 children: inline
TextNode <#text>
BlockContainer <div.cb> at (11,11) content-size 600x10 children: not-inline
BlockContainer <(anonymous)> at (11,11) content-size 600x0 children: inline
TextNode <#text>
BlockContainer <div.foo> at (12,72) content-size 598x18.000007 children: inline
line 0 width: 24.859375, height: 19.359375, bottom: 19.359375, baseline: 15.5
frag 0 from TextNode start: 0, length: 3, rect: [12,72 24.859375x19.359375]
"foo"
TextNode <#text>
BlockContainer <(anonymous)> at (11,211) content-size 600x19.359375 children: inline
line 0 width: 25.21875, height: 19.359375, bottom: 19.359375, baseline: 15.5
frag 0 from TextNode start: 1, length: 3, rect: [11,211 25.21875x19.359375]
"bar"
TextNode <#text>

20
Tests/LibWeb/Layout/input/vertical-padding-relative-to-cb-width.html Normal file
View file

@ -0,0 +1,20 @@
<style>
* {
border: 1px solid black;
}
.cb {
width: 600px;
height: 10px;
}
.foo {
background: orange;
box-sizing: border-box;
height: 200px;
padding-top: 10%;
padding-bottom: 20%;
}
</style>
<body>
<div class="cb">
<div class="foo">foo</div>
bar

6
Userland/Libraries/LibWeb/Layout/FormattingContext.cpp
View file

@ -1283,8 +1283,10 @@ CSS::Length FormattingContext::calculate_inner_height(Layout::Box const& box, Av
auto& computed_values = box.computed_values();
if (computed_values.box_sizing() == CSS::BoxSizing::BorderBox) {
auto const padding_top = computed_values.padding().top().resolved(box, height_of_containing_block_as_length_for_resolve).resolved(box);
auto const padding_bottom = computed_values.padding().bottom().resolved(box, height_of_containing_block_as_length_for_resolve).resolved(box);
auto width_of_containing_block = CSS::Length::make_px(containing_block_width_for(box));
auto const padding_top = computed_values.padding().top().resolved(box, width_of_containing_block).resolved(box);
auto const padding_bottom = computed_values.padding().bottom().resolved(box, width_of_containing_block).resolved(box);
auto inner_height = height.resolved(box, height_of_containing_block_as_length_for_resolve).resolved(box).to_px(box)
- computed_values.border_top().width