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-rw-r--r--servo/tests/unit/style/viewport.rs383
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diff --git a/servo/tests/unit/style/viewport.rs b/servo/tests/unit/style/viewport.rs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use cssparser::{Parser, ParserInput};
+use euclid::Scale;
+use euclid::Size2D;
+use servo_arc::Arc;
+use servo_config::prefs::{PREFS, PrefValue};
+use servo_url::ServoUrl;
+use style::context::QuirksMode;
+use style::media_queries::{Device, MediaList, MediaType};
+use style::parser::ParserContext;
+use style::shared_lock::{SharedRwLock, StylesheetGuards};
+use style::stylesheets::{CssRuleType, Stylesheet, StylesheetInDocument, Origin};
+use style::stylesheets::viewport_rule::*;
+use style::values::specified::LengthPercentageOrAuto::{self, Auto};
+use style::values::specified::NoCalcLength::{self, ViewportPercentage};
+use style::values::specified::ViewportPercentageLength::Vw;
+use style_traits::{ParsingMode, PinchZoomFactor};
+use style_traits::viewport::*;
+
+macro_rules! stylesheet {
+ ($css:expr, $origin:ident) => {
+ stylesheet!($css, $origin, SharedRwLock::new())
+ };
+ ($css:expr, $origin:ident, $shared_lock:expr) => {
+ Arc::new(Stylesheet::from_str(
+ $css,
+ ServoUrl::parse("http://localhost").unwrap(),
+ Origin::$origin,
+ Arc::new($shared_lock.wrap(MediaList::empty())),
+ $shared_lock,
+ None,
+ None,
+ QuirksMode::NoQuirks,
+ 0
+ ))
+ }
+}
+
+fn test_viewport_rule<F>(css: &str,
+ device: &Device,
+ callback: F)
+ where F: Fn(&Vec<ViewportDescriptorDeclaration>, &str)
+{
+ PREFS.set("layout.viewport.enabled", PrefValue::Boolean(true));
+ let stylesheet = stylesheet!(css, Author);
+ let mut rule_count = 0;
+ stylesheet.effective_viewport_rules(&device, &stylesheet.shared_lock.read(), |rule| {
+ rule_count += 1;
+ callback(&rule.declarations, css);
+ });
+ assert!(rule_count > 0);
+}
+
+fn test_meta_viewport<F>(meta: &str, callback: F)
+ where F: Fn(&Vec<ViewportDescriptorDeclaration>, &str)
+{
+ if let Some(mut rule) = ViewportRule::from_meta(meta) {
+ // from_meta uses a hash-map to collect the declarations, so we need to
+ // sort them in a stable order for the tests
+ rule.declarations.sort_by(|a, b| {
+ let a = a.descriptor.discriminant_value();
+ let b = b.descriptor.discriminant_value();
+ a.cmp(&b)
+ });
+
+ callback(&rule.declarations, meta);
+ } else {
+ panic!("no @viewport rule for {}", meta);
+ }
+}
+
+macro_rules! assert_decl_len {
+ ($declarations:ident == 1) => {
+ assert_eq!($declarations.len(), 1,
+ "expected 1 declaration; have {}: {:?})",
+ $declarations.len(), $declarations)
+ };
+ ($declarations:ident == $len:expr) => {
+ assert_eq!($declarations.len(), $len,
+ "expected {} declarations; have {}: {:?})",
+ $len, $declarations.len(), $declarations)
+ }
+}
+
+macro_rules! viewport_length {
+ ($value:expr, px) => {
+ ViewportLength::Specified(LengthPercentageOrAuto::Length(NoCalcLength::from_px($value)))
+ };
+ ($value:expr, vw) => {
+ ViewportLength::Specified(LengthPercentageOrAuto::Length(ViewportPercentage(Vw($value))))
+ }
+}
+
+#[test]
+fn empty_viewport_rule() {
+ let device = Device::new(MediaType::screen(), Size2D::new(800., 600.), Scale::new(1.0));
+
+ test_viewport_rule("@viewport {}", &device, |declarations, css| {
+ println!("{}", css);
+ assert_decl_len!(declarations == 0);
+ });
+}
+
+macro_rules! assert_decl_eq {
+ ($d:expr, $origin:ident, $expected:ident: $value:expr) => {{
+ assert_eq!($d.origin, Origin::$origin);
+ assert_eq!($d.descriptor, ViewportDescriptor::$expected($value));
+ assert_eq!($d.important, false, "descriptor should not be !important");
+ }};
+ ($d:expr, $origin:ident, $expected:ident: $value:expr, !important) => {{
+ assert_eq!($d.origin, Origin::$origin);
+ assert_eq!($d.descriptor, ViewportDescriptor::$expected($value));
+ assert_eq!($d.important, true, "descriptor should be !important");
+ }};
+}
+
+#[test]
+fn simple_viewport_rules() {
+ let device = Device::new(MediaType::screen(), Size2D::new(800., 600.), Scale::new(1.0));
+
+ test_viewport_rule("@viewport { width: auto; height: auto;\
+ zoom: auto; min-zoom: 0; max-zoom: 200%;\
+ user-zoom: zoom; orientation: auto; }",
+ &device, |declarations, css| {
+ println!("{}", css);
+ assert_decl_len!(declarations == 9);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::Specified(Auto));
+ assert_decl_eq!(&declarations[1], Author, MaxWidth: ViewportLength::Specified(Auto));
+ assert_decl_eq!(&declarations[2], Author, MinHeight: ViewportLength::Specified(Auto));
+ assert_decl_eq!(&declarations[3], Author, MaxHeight: ViewportLength::Specified(Auto));
+ assert_decl_eq!(&declarations[4], Author, Zoom: Zoom::Auto);
+ assert_decl_eq!(&declarations[5], Author, MinZoom: Zoom::Number(0.));
+ assert_decl_eq!(&declarations[6], Author, MaxZoom: Zoom::Percentage(2.));
+ assert_decl_eq!(&declarations[7], Author, UserZoom: UserZoom::Zoom);
+ assert_decl_eq!(&declarations[8], Author, Orientation: Orientation::Auto);
+ });
+
+ test_viewport_rule("@viewport { min-width: 200px; max-width: auto;\
+ min-height: 200px; max-height: auto; }",
+ &device, |declarations, css| {
+ println!("{}", css);
+ assert_decl_len!(declarations == 4);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: viewport_length!(200., px));
+ assert_decl_eq!(&declarations[1], Author, MaxWidth: ViewportLength::Specified(Auto));
+ assert_decl_eq!(&declarations[2], Author, MinHeight: viewport_length!(200., px));
+ assert_decl_eq!(&declarations[3], Author, MaxHeight: ViewportLength::Specified(Auto));
+ });
+}
+
+#[test]
+fn simple_meta_viewport_contents() {
+ test_meta_viewport("width=500, height=600", |declarations, meta| {
+ println!("{}", meta);
+ assert_decl_len!(declarations == 4);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::ExtendToZoom);
+ assert_decl_eq!(&declarations[1], Author, MaxWidth: viewport_length!(500., px));
+ assert_decl_eq!(&declarations[2], Author, MinHeight: ViewportLength::ExtendToZoom);
+ assert_decl_eq!(&declarations[3], Author, MaxHeight: viewport_length!(600., px));
+ });
+
+ test_meta_viewport("initial-scale=1.0", |declarations, meta| {
+ println!("{}", meta);
+ assert_decl_len!(declarations == 3);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::ExtendToZoom);
+ assert_decl_eq!(&declarations[1], Author, MaxWidth: ViewportLength::ExtendToZoom);
+ assert_decl_eq!(&declarations[2], Author, Zoom: Zoom::Number(1.));
+ });
+
+ test_meta_viewport("initial-scale=2.0, height=device-width", |declarations, meta| {
+ println!("{}", meta);
+ assert_decl_len!(declarations == 5);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::Specified(Auto));
+ assert_decl_eq!(&declarations[1], Author, MaxWidth: ViewportLength::Specified(Auto));
+ assert_decl_eq!(&declarations[2], Author, MinHeight: ViewportLength::ExtendToZoom);
+ assert_decl_eq!(&declarations[3], Author, MaxHeight: viewport_length!(100., vw));
+ assert_decl_eq!(&declarations[4], Author, Zoom: Zoom::Number(2.));
+ });
+
+ test_meta_viewport("width=480, initial-scale=2.0, user-scalable=1", |declarations, meta| {
+ println!("{}", meta);
+ assert_decl_len!(declarations == 4);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::ExtendToZoom);
+ assert_decl_eq!(&declarations[1], Author, MaxWidth: viewport_length!(480., px));
+ assert_decl_eq!(&declarations[2], Author, Zoom: Zoom::Number(2.));
+ assert_decl_eq!(&declarations[3], Author, UserZoom: UserZoom::Zoom);
+ });
+}
+
+#[test]
+fn cascading_within_viewport_rule() {
+ let device = Device::new(MediaType::screen(), Size2D::new(800., 600.), Scale::new(1.0));
+
+ // normal order of appearance
+ test_viewport_rule("@viewport { min-width: 200px; min-width: auto; }",
+ &device, |declarations, css| {
+ println!("{}", css);
+ assert_decl_len!(declarations == 1);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::Specified(Auto));
+ });
+
+ // !important order of appearance
+ test_viewport_rule("@viewport { min-width: 200px !important; min-width: auto !important; }",
+ &device, |declarations, css| {
+ println!("{}", css);
+ assert_decl_len!(declarations == 1);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::Specified(Auto), !important);
+ });
+
+ // !important vs normal
+ test_viewport_rule("@viewport { min-width: auto !important; min-width: 200px; }",
+ &device, |declarations, css| {
+ println!("{}", css);
+ assert_decl_len!(declarations == 1);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::Specified(Auto), !important);
+ });
+
+ // normal longhands vs normal shorthand
+ test_viewport_rule("@viewport { min-width: 200px; max-width: 200px; width: auto; }",
+ &device, |declarations, css| {
+ println!("{}", css);
+ assert_decl_len!(declarations == 2);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::Specified(Auto));
+ assert_decl_eq!(&declarations[1], Author, MaxWidth: ViewportLength::Specified(Auto));
+ });
+
+ // normal shorthand vs normal longhands
+ test_viewport_rule("@viewport { width: 200px; min-width: auto; max-width: auto; }",
+ &device, |declarations, css| {
+ println!("{}", css);
+ assert_decl_len!(declarations == 2);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::Specified(Auto));
+ assert_decl_eq!(&declarations[1], Author, MaxWidth: ViewportLength::Specified(Auto));
+ });
+
+ // one !important longhand vs normal shorthand
+ test_viewport_rule("@viewport { min-width: auto !important; width: 200px; }",
+ &device, |declarations, css| {
+ println!("{}", css);
+ assert_decl_len!(declarations == 2);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::Specified(Auto), !important);
+ assert_decl_eq!(&declarations[1], Author, MaxWidth: viewport_length!(200., px));
+ });
+
+ // both !important longhands vs normal shorthand
+ test_viewport_rule("@viewport { min-width: auto !important; max-width: auto !important; width: 200px; }",
+ &device, |declarations, css| {
+ println!("{}", css);
+ assert_decl_len!(declarations == 2);
+ assert_decl_eq!(&declarations[0], Author, MinWidth: ViewportLength::Specified(Auto), !important);
+ assert_decl_eq!(&declarations[1], Author, MaxWidth: ViewportLength::Specified(Auto), !important);
+ });
+}
+
+#[test]
+fn multiple_stylesheets_cascading() {
+ PREFS.set("layout.viewport.enabled", PrefValue::Boolean(true));
+ let device = Device::new(MediaType::screen(), Size2D::new(800., 600.), Scale::new(1.0));
+ let shared_lock = SharedRwLock::new();
+ let stylesheets = vec![
+ stylesheet!("@viewport { min-width: 100px; min-height: 100px; zoom: 1; }",
+ UserAgent,
+ shared_lock.clone()),
+ stylesheet!("@viewport { min-width: 200px; min-height: 200px; }",
+ User, shared_lock.clone()),
+ stylesheet!("@viewport { min-width: 300px; }",
+ Author, shared_lock.clone())
+ ];
+
+ let declarations = Cascade::from_stylesheets(
+ stylesheets.iter().map(|s| (&**s, Origin::Author)),
+ &StylesheetGuards::same(&shared_lock.read()),
+ &device,
+ ).finish();
+ assert_decl_len!(declarations == 3);
+ assert_decl_eq!(&declarations[0], UserAgent, Zoom: Zoom::Number(1.));
+ assert_decl_eq!(&declarations[1], User, MinHeight: viewport_length!(200., px));
+ assert_decl_eq!(&declarations[2], Author, MinWidth: viewport_length!(300., px));
+
+ let stylesheets = vec![
+ stylesheet!("@viewport { min-width: 100px !important; }",
+ UserAgent, shared_lock.clone()),
+ stylesheet!("@viewport { min-width: 200px !important; min-height: 200px !important; }",
+ User, shared_lock.clone()),
+ stylesheet!("@viewport { min-width: 300px !important; min-height: 300px !important; zoom: 3 !important; }",
+ Author, shared_lock.clone())
+ ];
+ let declarations = Cascade::from_stylesheets(
+ stylesheets.iter().map(|s| (&**s, Origin::Author)),
+ &StylesheetGuards::same(&shared_lock.read()),
+ &device,
+ ).finish();
+ assert_decl_len!(declarations == 3);
+ assert_decl_eq!(&declarations[0], UserAgent, MinWidth: viewport_length!(100., px), !important);
+ assert_decl_eq!(&declarations[1], User, MinHeight: viewport_length!(200., px), !important);
+ assert_decl_eq!(&declarations[2], Author, Zoom: Zoom::Number(3.), !important);
+}
+
+#[test]
+fn constrain_viewport() {
+ let url = ServoUrl::parse("http://localhost").unwrap();
+ let context = ParserContext::new(
+ Origin::Author,
+ &url,
+ Some(CssRuleType::Viewport),
+ ParsingMode::DEFAULT,
+ QuirksMode::NoQuirks,
+ None,
+ None,
+ );
+
+ macro_rules! from_css {
+ ($css:expr) => {
+ &ViewportRule::parse(&context, &mut Parser::new(&mut $css)).unwrap()
+ }
+ }
+
+ let initial_viewport = Size2D::new(800., 600.);
+ let device = Device::new(MediaType::screen(), initial_viewport, Scale::new(1.0));
+ let mut input = ParserInput::new("");
+ assert_eq!(ViewportConstraints::maybe_new(&device, from_css!(input), QuirksMode::NoQuirks), None);
+
+ let mut input = ParserInput::new("width: 320px auto");
+ assert_eq!(ViewportConstraints::maybe_new(&device, from_css!(input), QuirksMode::NoQuirks),
+ Some(ViewportConstraints {
+ size: initial_viewport,
+
+ initial_zoom: PinchZoomFactor::new(1.),
+ min_zoom: None,
+ max_zoom: None,
+
+ user_zoom: UserZoom::Zoom,
+ orientation: Orientation::Auto
+ }));
+
+ let mut input = ParserInput::new("width: 320px auto");
+ assert_eq!(ViewportConstraints::maybe_new(&device, from_css!(input), QuirksMode::NoQuirks),
+ Some(ViewportConstraints {
+ size: initial_viewport,
+
+ initial_zoom: PinchZoomFactor::new(1.),
+ min_zoom: None,
+ max_zoom: None,
+
+ user_zoom: UserZoom::Zoom,
+ orientation: Orientation::Auto
+ }));
+
+ let mut input = ParserInput::new("width: 800px; height: 600px;\
+ zoom: 1;\
+ user-zoom: zoom;\
+ orientation: auto;");
+ assert_eq!(ViewportConstraints::maybe_new(&device,
+ from_css!(input),
+ QuirksMode::NoQuirks),
+ Some(ViewportConstraints {
+ size: initial_viewport,
+
+ initial_zoom: PinchZoomFactor::new(1.),
+ min_zoom: None,
+ max_zoom: None,
+
+ user_zoom: UserZoom::Zoom,
+ orientation: Orientation::Auto
+ }));
+
+ let initial_viewport = Size2D::new(200., 150.);
+ let device = Device::new(MediaType::screen(), initial_viewport, Scale::new(1.0));
+ let mut input = ParserInput::new("width: 320px auto");
+ assert_eq!(ViewportConstraints::maybe_new(&device, from_css!(input), QuirksMode::NoQuirks),
+ Some(ViewportConstraints {
+ size: Size2D::new(320., 240.),
+
+ initial_zoom: PinchZoomFactor::new(1.),
+ min_zoom: None,
+ max_zoom: None,
+
+ user_zoom: UserZoom::Zoom,
+ orientation: Orientation::Auto
+ }));
+}
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