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Implement Calc for LengthOrPercentageOrAuto

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This commit is contained in:
David Zbarsky 2015-08-11 21:08:05 -04:00
parent 9556141e57
commit cb4d878169
7 changed files with 44 additions and 0 deletions
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10
components/layout/block.rs
View file

@ -327,8 +327,12 @@ impl CandidateBSizeIterator {
(LengthOrPercentageOrAuto::Percentage(percent), Some(block_container_block_size)) => {
MaybeAuto::Specified(block_container_block_size.scale_by(percent))
}
(LengthOrPercentageOrAuto::Calc(calc), Some(block_container_block_size)) => {
MaybeAuto::Specified(calc.length() + block_container_block_size.scale_by(calc.percentage()))
}
(LengthOrPercentageOrAuto::Percentage(_), None) | (LengthOrPercentageOrAuto::Auto, _) => MaybeAuto::Auto,
(LengthOrPercentageOrAuto::Length(length), _) => MaybeAuto::Specified(length),
(LengthOrPercentageOrAuto::Calc(calc), _) => MaybeAuto::Specified(calc.length()),
};
let max_block_size = match (fragment.style.max_block_size(), block_container_block_size) {
(LengthOrPercentageOrNone::Percentage(percent), Some(block_container_block_size)) =>
@ -1118,6 +1122,12 @@ impl BlockFlow {
let content_block_size = self.fragment.style().content_block_size();
match (content_block_size, containing_block_size) {
(LengthOrPercentageOrAuto::Calc(calc), Some(container_size)) => {
Some(container_size.scale_by(calc.percentage()) + calc.length())
}
(LengthOrPercentageOrAuto::Calc(calc), _) => {
Some(calc.length())
},
(LengthOrPercentageOrAuto::Length(length), _) => Some(length),
(LengthOrPercentageOrAuto::Percentage(percent), Some(container_size)) => {
Some(container_size.scale_by(percent))

11
components/layout/fragment.rs
View file

@ -463,6 +463,12 @@ impl ReplacedImageFragmentInfo {
MaybeAuto::Specified(container_size.scale_by(pc))
}
(LengthOrPercentageOrAuto::Percentage(_), _, None) => MaybeAuto::Auto,
(LengthOrPercentageOrAuto::Calc(calc), _, Some(container_size)) => {
MaybeAuto::Specified(calc.length() + container_size.scale_by(calc.percentage()))
}
(LengthOrPercentageOrAuto::Calc(calc), _, None) => {
MaybeAuto::Specified(calc.length())
}
(LengthOrPercentageOrAuto::Auto, Some(dom_length), _) => MaybeAuto::Specified(dom_length),
(LengthOrPercentageOrAuto::Auto, None, _) => MaybeAuto::Auto,
}
@ -616,6 +622,10 @@ impl IframeFragmentInfo {
let computed_size = match (content_size, containing_size) {
(LengthOrPercentageOrAuto::Length(length), _) => length,
(LengthOrPercentageOrAuto::Percentage(pc), Some(container_size)) => container_size.scale_by(pc),
(LengthOrPercentageOrAuto::Calc(calc), Some(container_size)) => {
container_size.scale_by(calc.percentage()) + calc.length()
},
(LengthOrPercentageOrAuto::Calc(calc), None) => calc.length(),
(LengthOrPercentageOrAuto::Percentage(_), None) => default_size,
(LengthOrPercentageOrAuto::Auto, _) => default_size,
};
@ -1285,6 +1295,7 @@ impl Fragment {
}
(Some(dom_inline_size), _) => dom_inline_size,
(None, LengthOrPercentageOrAuto::Length(length)) => length,
(None, LengthOrPercentageOrAuto::Calc(calc)) => calc.length(),
};
result.union_block(&IntrinsicISizes {
minimum_inline_size: image_inline_size,

3
components/layout/model.rs
View file

@ -379,6 +379,9 @@ impl MaybeAuto {
LengthOrPercentageOrAuto::Percentage(percent) => {
MaybeAuto::Specified(containing_length.scale_by(percent))
}
LengthOrPercentageOrAuto::Calc(calc) => {
MaybeAuto::Specified(calc.length() + containing_length.scale_by(calc.percentage()))
}
LengthOrPercentageOrAuto::Length(length) => MaybeAuto::Specified(length)
}
}

2
components/layout/table.rs
View file

@ -267,11 +267,13 @@ impl Flow for TableFlow {
self.column_intrinsic_inline_sizes.push(ColumnIntrinsicInlineSize {
minimum_length: match *specified_inline_size {
LengthOrPercentageOrAuto::Auto |
LengthOrPercentageOrAuto::Calc(_) |
LengthOrPercentageOrAuto::Percentage(_) => Au(0),
LengthOrPercentageOrAuto::Length(length) => length,
},
percentage: match *specified_inline_size {
LengthOrPercentageOrAuto::Auto |
LengthOrPercentageOrAuto::Calc(_) |
LengthOrPercentageOrAuto::Length(_) => 0.0,
LengthOrPercentageOrAuto::Percentage(percentage) => percentage,
},

3
components/layout/table_row.rs
View file

@ -272,6 +272,7 @@ impl Flow for TableRowFlow {
let child_column_inline_size = ColumnIntrinsicInlineSize {
minimum_length: match child_specified_inline_size {
LengthOrPercentageOrAuto::Auto |
LengthOrPercentageOrAuto::Calc(_) |
LengthOrPercentageOrAuto::Percentage(_) => {
child_base.intrinsic_inline_sizes.minimum_inline_size
}
@ -279,6 +280,7 @@ impl Flow for TableRowFlow {
},
percentage: match child_specified_inline_size {
LengthOrPercentageOrAuto::Auto |
LengthOrPercentageOrAuto::Calc(_) |
LengthOrPercentageOrAuto::Length(_) => 0.0,
LengthOrPercentageOrAuto::Percentage(percentage) => percentage,
},
@ -286,6 +288,7 @@ impl Flow for TableRowFlow {
constrained: match child_specified_inline_size {
LengthOrPercentageOrAuto::Length(_) => true,
LengthOrPercentageOrAuto::Auto |
LengthOrPercentageOrAuto::Calc(_) |
LengthOrPercentageOrAuto::Percentage(_) => false,
},
};

13
components/style/values.rs
View file

@ -490,6 +490,7 @@ pub mod specified {
Length(Length),
Percentage(CSSFloat), // [0 .. 100%] maps to [0.0 .. 1.0]
Auto,
Calc(Calc),
}
impl ToCss for LengthOrPercentageOrAuto {
@ -499,6 +500,7 @@ pub mod specified {
&LengthOrPercentageOrAuto::Percentage(percentage)
=> write!(dest, "{}%", percentage * 100.),
&LengthOrPercentageOrAuto::Auto => dest.write_str("auto"),
&LengthOrPercentageOrAuto::Calc(calc) => calc.to_css(dest),
}
}
}
@ -516,6 +518,10 @@ pub mod specified {
Ok(LengthOrPercentageOrAuto::Length(Length::Absolute(Au(0)))),
Token::Ident(ref value) if value.eq_ignore_ascii_case("auto") =>
Ok(LengthOrPercentageOrAuto::Auto),
Token::Function(ref name) if name.eq_ignore_ascii_case("calc") => {
let calc = try!(input.parse_nested_block(Calc::parse));
Ok(LengthOrPercentageOrAuto::Calc(calc))
},
_ => Err(())
}
}
@ -1122,6 +1128,7 @@ pub mod computed {
Length(Au),
Percentage(CSSFloat),
Auto,
Calc(Calc),
}
impl fmt::Debug for LengthOrPercentageOrAuto {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
@ -1129,6 +1136,8 @@ pub mod computed {
&LengthOrPercentageOrAuto::Length(length) => write!(f, "{:?}", length),
&LengthOrPercentageOrAuto::Percentage(percentage) => write!(f, "{}%", percentage * 100.),
&LengthOrPercentageOrAuto::Auto => write!(f, "auto"),
// XXX HACK WRONG
&LengthOrPercentageOrAuto::Calc(calc) => write!(f, "{}%", 100.),
}
}
}
@ -1148,6 +1157,9 @@ pub mod computed {
specified::LengthOrPercentageOrAuto::Auto => {
LengthOrPercentageOrAuto::Auto
}
specified::LengthOrPercentageOrAuto::Calc(calc) => {
LengthOrPercentageOrAuto::Calc(calc.to_computed_value(context))
}
}
}
}
@ -1159,6 +1171,7 @@ pub mod computed {
&LengthOrPercentageOrAuto::Percentage(percentage)
=> write!(dest, "{}%", percentage * 100.),
&LengthOrPercentageOrAuto::Auto => dest.write_str("auto"),
&LengthOrPercentageOrAuto::Calc(calc) => calc.to_css(dest),
}
}
}

2
components/style/viewport.rs
View file

@ -437,6 +437,8 @@ impl ViewportConstraints {
LengthOrPercentageOrAuto::Percentage(value) =>
Some(initial_viewport.$dimension.scale_by(value)),
LengthOrPercentageOrAuto::Auto => None,
// XXX WRONG HACK
LengthOrPercentageOrAuto::Calc(calc) => None,
}
} else {
None