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style: Move the from-font value from text-underline-offset to text-underline-position, as per recent spec changes, and fix interaction between position and offset.

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Differential Revision: https://phabricator.services.mozilla.com/D59778
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Jonathan Kew 2020-02-03 14:38:28 +00:00 • committed by Emilio Cobos Álvarez
parent 2910ca6197
commit df01cec675
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4 changed files with 22 additions and 14 deletions
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26
components/style/values/specified/text.rs
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@ -1029,7 +1029,7 @@ pub enum TextDecorationSkipInk {
None,
}
/// Implements type for `text-underline-offset` and `text-decoration-thickness` properties
/// Implements type for `text-decoration-thickness` property
pub type TextDecorationLength = GenericTextDecorationLength<LengthPercentage>;
impl TextDecorationLength {
@ -1048,21 +1048,23 @@ impl TextDecorationLength {
bitflags! {
#[derive(MallocSizeOf, SpecifiedValueInfo, ToComputedValue, ToResolvedValue, ToShmem)]
#[value_info(other_values = "auto,under,left,right")]
#[value_info(other_values = "auto,from-font,under,left,right")]
#[repr(C)]
/// Specified keyword values for the text-underline-position property.
/// (Non-exclusive, but not all combinations are allowed: only `under` may occur
/// together with either `left` or `right`.)
/// https://drafts.csswg.org/css-text-decor-3/#text-underline-position-property
/// (Non-exclusive, but not all combinations are allowed: the spec grammar gives
/// `auto | [ from-font | under ] || [ left | right ]`.)
/// https://drafts.csswg.org/css-text-decor-4/#text-underline-position-property
pub struct TextUnderlinePosition: u8 {
/// Use automatic positioning below the alphabetic baseline.
const AUTO = 0;
/// Use underline position from the first available font.
const FROM_FONT = 1 << 0;
/// Below the glyph box.
const UNDER = 1 << 0;
const UNDER = 1 << 1;
/// In vertical mode, place to the left of the text.
const LEFT = 1 << 1;
const LEFT = 1 << 2;
/// In vertical mode, place to the right of the text.
const RIGHT = 1 << 2;
const RIGHT = 1 << 3;
}
}
@ -1085,7 +1087,12 @@ impl Parse for TextUnderlinePosition {
"auto" if result.is_empty() => {
return Ok(result);
},
"under" if !result.intersects(TextUnderlinePosition::UNDER) => {
"from-font" if !result.intersects(TextUnderlinePosition::FROM_FONT |
TextUnderlinePosition::UNDER) => {
result.insert(TextUnderlinePosition::FROM_FONT);
},
"under" if !result.intersects(TextUnderlinePosition::FROM_FONT |
TextUnderlinePosition::UNDER) => {
result.insert(TextUnderlinePosition::UNDER);
},
"left" if !result.intersects(TextUnderlinePosition::LEFT |
@ -1131,6 +1138,7 @@ impl ToCss for TextUnderlinePosition {
};
}
maybe_write!(FROM_FONT => "from-font");
maybe_write!(UNDER => "under");
maybe_write!(LEFT => "left");
maybe_write!(RIGHT => "right");