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Implement constraining as per DEVICE-ADAPT § 6

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Spec: http://dev.w3.org/csswg/css-device-adapt/#constraining
This commit is contained in:
James Gilbertson 2015-04-22 21:21:22 -06:00
parent 3b14c07051
commit 8977316d3e
4 changed files with 280 additions and 0 deletions
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71
tests/unit/style/viewport.rs
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@ -200,3 +200,74 @@ fn multiple_stylesheets_cascading() {
assert_declaration_eq!(&declarations[1], User, MinHeight: LengthOrPercentageOrAuto::Length(Length::from_px(200.)), !important);
assert_declaration_eq!(&declarations[2], Author, Zoom: Zoom::Number(3.), !important);
}
#[test]
fn constrain_viewport() {
let url = Url::parse("http://localhost").unwrap();
let context = ParserContext::new(Origin::Author, &url);
macro_rules! from_css {
($css:expr) => {
&ViewportRule::parse(&mut Parser::new($css), &context).unwrap()
}
}
let initial_viewport = TypedSize2D(800., 600.);
assert_eq!(ViewportConstraints::maybe_new(initial_viewport, from_css!("")),
None);
let initial_viewport = TypedSize2D(800., 600.);
assert_eq!(ViewportConstraints::maybe_new(initial_viewport, from_css!("width: 320px auto")),
Some(ViewportConstraints {
size: initial_viewport,
initial_zoom: ScaleFactor::new(1.),
min_zoom: None,
max_zoom: None,
user_zoom: UserZoom::Zoom,
orientation: Orientation::Auto
}));
let initial_viewport = TypedSize2D(200., 150.);
assert_eq!(ViewportConstraints::maybe_new(initial_viewport, from_css!("width: 320px auto")),
Some(ViewportConstraints {
size: TypedSize2D(320., 240.),
initial_zoom: ScaleFactor::new(1.),
min_zoom: None,
max_zoom: None,
user_zoom: UserZoom::Zoom,
orientation: Orientation::Auto
}));
let initial_viewport = TypedSize2D(800., 600.);
assert_eq!(ViewportConstraints::maybe_new(initial_viewport, from_css!("width: 320px auto")),
Some(ViewportConstraints {
size: initial_viewport,
initial_zoom: ScaleFactor::new(1.),
min_zoom: None,
max_zoom: None,
user_zoom: UserZoom::Zoom,
orientation: Orientation::Auto
}));
let initial_viewport = TypedSize2D(800., 600.);
assert_eq!(ViewportConstraints::maybe_new(initial_viewport, from_css!("width: 800px; height: 600px;\
zoom: 1;\
user-zoom: zoom;\
orientation: auto;")),
Some(ViewportConstraints {
size: initial_viewport,
initial_zoom: ScaleFactor::new(1.),
min_zoom: None,
max_zoom: None,
user_zoom: UserZoom::Zoom,
orientation: Orientation::Auto
}));
}