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Support <div align="..."> and <center> on inline layout (#31388)

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As per HTML [1], <div align="..."> and <center> should behave as if they
had the text-align property set to the corresponding value.

Servo implements that as internal text-align values because there should
the extra effect of aligning block descendants, but that part has not
been implemented yet. This patch only adds support for inline layout.

[1]: https://html.spec.whatwg.org/multipage/rendering.html#flow-content-3
This commit is contained in:
Oriol Brufau 2024-02-23 16:36:36 +01:00 • committed by GitHub
parent 0a8b69879a
commit 38d2ad9592
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1 changed files with 15 additions and 12 deletions
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27
components/layout_2020/flow/inline.rs
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@ -828,7 +828,6 @@ impl<'a, 'b> InlineFormattingContextState<'a, 'b> {
End,
}
let style = self.containing_block.style;
let line_left_is_inline_start = style.writing_mode.line_left_is_inline_start();
let mut text_align_keyword = style.clone_text_align();
if last_line_or_forced_line_break {
@ -848,19 +847,23 @@ impl<'a, 'b> InlineFormattingContextState<'a, 'b> {
let text_align = match text_align_keyword {
TextAlignKeyword::Start => TextAlign::Start,
TextAlignKeyword::Center => TextAlign::Center,
TextAlignKeyword::Center | TextAlignKeyword::ServoCenter => TextAlign::Center,
TextAlignKeyword::End => TextAlign::End,
TextAlignKeyword::Left if line_left_is_inline_start => TextAlign::Start,
TextAlignKeyword::Left => TextAlign::End,
TextAlignKeyword::Right if line_left_is_inline_start => TextAlign::End,
TextAlignKeyword::Right => TextAlign::Start,
TextAlignKeyword::Justify => TextAlign::Start,
TextAlignKeyword::ServoCenter |
TextAlignKeyword::ServoLeft |
TextAlignKeyword::ServoRight => {
// TODO: Implement these modes which seem to be used by quirks mode.
TextAlign::Start
TextAlignKeyword::Left | TextAlignKeyword::ServoLeft => {
if style.writing_mode.line_left_is_inline_start() {
TextAlign::Start
} else {
TextAlign::End
}
},
TextAlignKeyword::Right | TextAlignKeyword::ServoRight => {
if style.writing_mode.line_left_is_inline_start() {
TextAlign::End
} else {
TextAlign::Start
}
},
TextAlignKeyword::Justify => TextAlign::Start,
};
let (line_start, available_space) = match self.current_line.placement_among_floats.get() {