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LibWeb: Fix intrinsic sizing when min or max width is specified

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Fixes the problem that width is incorrectly computed in intrinsic
sizing mode when there are blocks that have min-width or max-width
specified.

Actually that is just the fix of a symptom of the larger problem that
Length::to_px() returns 0 when value is auto regardless of available
size.
This commit is contained in:
Aliaksandr Kalenik 2023-05-02 17:20:10 +03:00 committed by Andreas Kling
parent 9bd35fda56
commit f6ff37398c
Notes: sideshowbarker 2024-07-17 02:22:23 +09:00 
Author: https://github.com/kalenikaliaksandr
Commit: https://github.com/SerenityOS/serenity/commit/f6ff37398c
Pull-request: https://github.com/SerenityOS/serenity/pull/18606
3 changed files with 26 additions and 2 deletions
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5
Tests/LibWeb/Layout/expected/block-and-inline/intrinsic-sizing-with-min-width-specified.txt Normal file
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@ -0,0 +1,5 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (1,1) content-size 798x52 children: not-inline
BlockContainer <body> at (10,10) content-size 104x34 floating children: not-inline
BlockContainer <div.outer> at (11,11) content-size 102x32 children: not-inline
BlockContainer <div.inner> at (12,12) content-size 100x30 children: not-inline

17
Tests/LibWeb/Layout/input/block-and-inline/intrinsic-sizing-with-min-width-specified.html Normal file
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@ -0,0 +1,17 @@
<!DOCTYPE html><style>
* {
font-family: 'SerenitySans';
border: 1px solid black;
}
body {
float: left;
}
.outer {
min-width: 32px;
background-color: orange;
}
.inner {
width: 100px;
height: 30px;
}
</style><div class="outer"><div class="inner">

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

@ -229,7 +229,8 @@ void BlockFormattingContext::compute_width(Box const& box, AvailableSpace const&
// but this time using the computed value of 'max-width' as the computed value for 'width'.
if (!computed_values.max_width().is_none()) {
auto max_width = calculate_inner_width(box, available_space.width, computed_values.max_width());
if (used_width.to_px(box) > max_width.to_px(box)) {
auto used_width_px = used_width.is_auto() ? available_space.width.to_px() : used_width.to_px(box);
if (used_width_px > max_width.to_px(box)) {
used_width = try_compute_width(max_width);
}
}
@ -238,7 +239,8 @@ void BlockFormattingContext::compute_width(Box const& box, AvailableSpace const&
// but this time using the value of 'min-width' as the computed value for 'width'.
if (!computed_values.min_width().is_auto()) {
auto min_width = calculate_inner_width(box, available_space.width, computed_values.min_width());
if (used_width.to_px(box) < min_width.to_px(box)) {
auto used_width_px = used_width.is_auto() ? available_space.width.to_px() : used_width.to_px(box);
if (used_width_px < min_width.to_px(box)) {
used_width = try_compute_width(min_width);
}
}