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Fix positioning of RTL blocks with margins.

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`BaseFlow::position` is relative to the parent flow's margin box in the inline
direction.  We need to use the parent's `position` as the container size when
translating it to physical coordinates, or we get incorrect results for
non-LTR content.
This commit is contained in:
Matt Brubeck 2015-05-13 07:13:33 -07:00
parent 8979d77e77
commit dc19806b15
4 changed files with 73 additions and 11 deletions
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14
components/layout/block.rs
View file

@ -1572,11 +1572,8 @@ impl Flow for BlockFlow {
// Distance from the inline-end margin edge to the inline-end content edge.
let inline_end_content_edge =
self.base.block_container_inline_size -
self.fragment.margin.inline_end -
self.fragment.border_box.size.inline -
self.fragment.border_box.start.i -
padding_and_borders;
self.fragment.margin.inline_end +
self.fragment.border_padding.inline_end;
let content_inline_size = self.fragment.border_box.size.inline - padding_and_borders;
@ -1747,7 +1744,7 @@ impl Flow for BlockFlow {
.contains(LAYERS_NEEDED_FOR_DESCENDANTS),
};
let container_size_for_children =
self.fragment.content_box().size.to_physical(self.base.writing_mode);
self.base.position.size.to_physical(self.base.writing_mode);
// Compute the origin and clipping rectangle for children.
let relative_offset = relative_offset.to_physical(self.base.writing_mode);
@ -1786,8 +1783,6 @@ impl Flow for BlockFlow {
if flow::base(kid).flags.contains(INLINE_POSITION_IS_STATIC) ||
flow::base(kid).flags.contains(BLOCK_POSITION_IS_STATIC) {
let kid_base = flow::mut_base(kid);
// FIXME (mbrubeck): `position.size` is inflated by the inline margin size, making
// this incorrect for RTL blocks (see `set_inline_size_constraint_solutions`).
let physical_position = kid_base.position.to_physical(kid_base.writing_mode,
container_size_for_children);
@ -2097,9 +2092,6 @@ pub trait ISizeAndMarginsComputer {
// We also resize the block itself, to ensure that overflow is not calculated
// as the inline-size of our parent. We might be smaller and we might be larger if we
// overflow.
//
// FIXME (mbrubeck): The margin is included in position.size but not position.start, which
// throws off position.to_physical results (especially for RTL blocks).
flow::mut_base(block).position.size.inline = inline_size + extra_inline_size_from_margin;
}

1
tests/ref/basic.list
View file

@ -264,6 +264,7 @@ experimental != overconstrained_block.html overconstrained_block_ref.html
== root_margin_collapse_a.html root_margin_collapse_b.html
== root_pseudo_a.html root_pseudo_b.html
experimental == rtl_body.html rtl_body_ref.html
experimental == rtl_margin_a.html rtl_margin_ref.html
experimental == rtl_simple.html rtl_simple_ref.html
== servo_center_a.html servo_center_ref.html
== setattribute_id_restyle_a.html setattribute_id_restyle_b.html

35
tests/ref/rtl_margin_a.html Normal file
View file

@ -0,0 +1,35 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>RTL margin test</title>
<style>
body {
margin: 8px;
}
#a {
direction: rtl;
}
#b {
border: 1px solid red;
width: 100px;
height: 100px;
}
#c {
border: 1px solid blue;
margin: 10px;
width: 50px;
height: 50px;
}
</style>
</head>
<body>
<div id="a">
<div id="b">
<div id="c">
</div>
</div>
</div>
</body>
</html>

34
tests/ref/rtl_margin_ref.html Normal file
View file

@ -0,0 +1,34 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>RTL margin test</title>
<style>
#b {
border: 1px solid red;
width: 100px;
height: 100px;
position: absolute;
top: 8px;
right: 8px;
}
#c {
border: 1px solid blue;
position: absolute;
top: 10px;
right: 10px;
width: 50px;
height: 50px;
}
</style>
</head>
<body>
<div id="a">
<div id="b">
<div id="c">
</div>
</div>
</div>
</body>
</html>