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implement update_source_set, select_image_source

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nupurbaghel 2018-07-04 01:17:22 +05:30
parent 8eb2a53e20
commit 8d06da8afd
6 changed files with 289 additions and 99 deletions
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7
components/style/values/specified/source_size_list.rs
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@ -18,6 +18,7 @@ use values::specified::{Length, NoCalcLength, ViewportPercentageLength};
/// A value for a `<source-size>`:
///
/// https://html.spec.whatwg.org/multipage/#source-size
#[derive(Debug)]
pub struct SourceSize {
condition: MediaCondition,
value: Length,
@ -38,6 +39,7 @@ impl Parse for SourceSize {
/// A value for a `<source-size-list>`:
///
/// https://html.spec.whatwg.org/multipage/#source-size-list
#[derive(Debug)]
pub struct SourceSizeList {
source_sizes: Vec<SourceSize>,
value: Option<Length>,
@ -52,6 +54,11 @@ impl SourceSizeList {
}
}
/// Set content of `value`, which can be used as fall-back during evaluate.
pub fn set_fallback_value(&mut self, width: Option<Length>) {
self.value = width;
}
/// Evaluate this <source-size-list> to get the final viewport length.
pub fn evaluate(&self, device: &Device, quirks_mode: QuirksMode) -> Au {
let matching_source_size = self.source_sizes