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style: Add a ValueInfo trait for exposing types needed by devtools.

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Most of types just derive it using proc_macro directly. Some of value
types need manual impl.

In my current plan, this new trait will be used in bug 1434130 to expose
values as well.

Bug: 1455576
Reviewed-by: emilio
MozReview-Commit-ID: LI7fy45VkRw
This commit is contained in:
Xidorn Quan 2018-04-26 09:01:02 +10:00 • committed by Emilio Cobos Álvarez
parent 276fb7e04b
commit 7fe7b2ffb1
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66 changed files with 615 additions and 249 deletions
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4
components/style/values/specified/calc.rs
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@ -9,7 +9,7 @@
use cssparser::{AngleOrNumber, NumberOrPercentage, Parser, Token};
use parser::ParserContext;
use std::fmt::{self, Write};
use style_traits::{CssWriter, ParseError, StyleParseErrorKind, ToCss};
use style_traits::{CssWriter, ParseError, SpecifiedValueInfo, StyleParseErrorKind, ToCss};
use style_traits::values::specified::AllowedNumericType;
use values::{CSSFloat, CSSInteger};
use values::computed;
@ -150,6 +150,8 @@ impl ToCss for CalcLengthOrPercentage {
}
}
impl SpecifiedValueInfo for CalcLengthOrPercentage {}
impl CalcNode {
/// Tries to parse a single element in the expression, that is, a
/// `<length>`, `<angle>`, `<time>`, `<percentage>`, according to