Improve implementation of DOMRect and implement DOMRectReadOnly

Passes most tests from test-css.

11 files changed, 198 insertions, 184 deletions

diff --git a/components/script/devtools.rs b/components/script/devtools.rs
index 0e892f32e6a..2356a4896f9 100644
--- a/components/script/devtools.rs
+++ b/components/script/devtools.rs
@@ -102,8 +102,8 @@ pub fn handle_get_layout(page: &Rc<Page>,
     let node = find_node_by_unique_id(&*page, pipeline, node_id);
     let elem = ElementCast::to_ref(node.r()).expect("should be getting layout of element");
     let rect = elem.GetBoundingClientRect();
-    let width = *rect.r().Width();
-    let height = *rect.r().Height();
+    let width = rect.Width() as f32;
+    let height = rect.Height() as f32;
     reply.send(ComputedNodeLayout { width: width, height: height }).unwrap();
 }
 
diff --git a/components/script/dom/domrect.rs b/components/script/dom/domrect.rs
index 6706642b5c5..fa1dcc1b165 100644
--- a/components/script/dom/domrect.rs
+++ b/components/script/dom/domrect.rs
@@ -2,74 +2,75 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use app_units::Au;
 use dom::bindings::codegen::Bindings::DOMRectBinding;
 use dom::bindings::codegen::Bindings::DOMRectBinding::DOMRectMethods;
+use dom::bindings::codegen::Bindings::DOMRectReadOnlyBinding::DOMRectReadOnlyMethods;
+use dom::bindings::error::Fallible;
 use dom::bindings::global::GlobalRef;
 use dom::bindings::js::Root;
-use dom::bindings::num::Finite;
-use dom::bindings::utils::{Reflector, reflect_dom_object};
-use dom::window::Window;
+use dom::bindings::utils::reflect_dom_object;
+use dom::domrectreadonly::DOMRectReadOnly;
 
 #[dom_struct]
 pub struct DOMRect {
-    reflector_: Reflector,
-    top: f32,
-    bottom: f32,
-    left: f32,
-    right: f32,
+    rect: DOMRectReadOnly,
 }
 
 impl DOMRect {
-    fn new_inherited(top: Au, bottom: Au,
-                         left: Au, right: Au) -> DOMRect {
+    fn new_inherited(x: f64, y: f64, width: f64, height: f64) -> DOMRect {
         DOMRect {
-            top: top.to_nearest_px() as f32,
-            bottom: bottom.to_nearest_px() as f32,
-            left: left.to_nearest_px() as f32,
-            right: right.to_nearest_px() as f32,
-            reflector_: Reflector::new(),
+            rect: DOMRectReadOnly::new_inherited(x, y, width, height),
         }
     }
 
-    pub fn new(window: &Window,
-               top: Au, bottom: Au,
-               left: Au, right: Au) -> Root<DOMRect> {
-        reflect_dom_object(box DOMRect::new_inherited(top, bottom, left, right),
-                           GlobalRef::Window(window), DOMRectBinding::Wrap)
+    pub fn new(global: GlobalRef, x: f64, y: f64, width: f64, height: f64) -> Root<DOMRect> {
+        reflect_dom_object(box DOMRect::new_inherited(x, y, width, height), global, DOMRectBinding::Wrap)
+    }
+
+    pub fn Constructor(global: GlobalRef,
+                        x: f64, y: f64, width: f64, height: f64) -> Fallible<Root<DOMRect>> {
+        Ok(DOMRect::new(global, x, y, width, height))
     }
 }
 
 impl DOMRectMethods for DOMRect {
-    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-top
-    fn Top(&self) -> Finite<f32> {
-        Finite::wrap(self.top)
+    // https://drafts.fxtf.org/geometry/#dom-domrect-x
+    fn X(&self) -> f64 {
+        self.rect.X()
+    }
+
+    // https://drafts.fxtf.org/geometry/#dom-domrect-x
+    fn SetX(&self, value: f64) {
+        self.rect.set_x(value);
+    }
+
+    // https://drafts.fxtf.org/geometry/#dom-domrect-y
+    fn Y(&self) -> f64 {
+        self.rect.Y()
     }
 
-    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-bottom
-    fn Bottom(&self) -> Finite<f32> {
-        Finite::wrap(self.bottom)
+    // https://drafts.fxtf.org/geometry/#dom-domrect-y
+    fn SetY(&self, value: f64) {
+        self.rect.set_y(value);
     }
 
-    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-left
-    fn Left(&self) -> Finite<f32> {
-        Finite::wrap(self.left)
+    // https://drafts.fxtf.org/geometry/#dom-domrect-width
+    fn Width(&self) -> f64 {
+        self.rect.Width()
     }
 
-    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-right
-    fn Right(&self) -> Finite<f32> {
-        Finite::wrap(self.right)
+    // https://drafts.fxtf.org/geometry/#dom-domrect-width
+    fn SetWidth(&self, value: f64) {
+        self.rect.set_width(value);
     }
 
-    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-width
-    fn Width(&self) -> Finite<f32> {
-        let result = (self.right - self.left).abs();
-        Finite::wrap(result)
+    // https://drafts.fxtf.org/geometry/#dom-domrect-height
+    fn Height(&self) -> f64 {
+        self.rect.Height()
     }
 
-    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-height
-    fn Height(&self) -> Finite<f32> {
-        let result = (self.bottom - self.top).abs();
-        Finite::wrap(result)
+    // https://drafts.fxtf.org/geometry/#dom-domrect-height
+    fn SetHeight(&self, value: f64) {
+        self.rect.set_height(value);
     }
 }
diff --git a/components/script/dom/domrectreadonly.rs b/components/script/dom/domrectreadonly.rs
new file mode 100644
index 00000000000..a6ba99ead2a
--- /dev/null
+++ b/components/script/dom/domrectreadonly.rs
@@ -0,0 +1,102 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+use dom::bindings::codegen::Bindings::DOMRectReadOnlyBinding::{DOMRectReadOnlyMethods, Wrap};
+use dom::bindings::error::Fallible;
+use dom::bindings::global::GlobalRef;
+use dom::bindings::js::Root;
+use dom::bindings::utils::{Reflector, reflect_dom_object};
+use std::cell::Cell;
+
+#[dom_struct]
+pub struct DOMRectReadOnly {
+    reflector_: Reflector,
+    x: Cell<f64>,
+    y: Cell<f64>,
+    width: Cell<f64>,
+    height: Cell<f64>,
+}
+
+impl DOMRectReadOnly {
+    pub fn new_inherited(x: f64, y: f64, width: f64, height: f64) -> DOMRectReadOnly {
+        DOMRectReadOnly {
+            x: Cell::new(x),
+            y: Cell::new(y),
+            width: Cell::new(width),
+            height: Cell::new(height),
+            reflector_: Reflector::new(),
+        }
+    }
+
+    pub fn new(global: GlobalRef, x: f64, y: f64, width: f64, height: f64) -> Root<DOMRectReadOnly> {
+        reflect_dom_object(box DOMRectReadOnly::new_inherited(x, y, width, height), global, Wrap)
+    }
+
+    pub fn Constructor(global: GlobalRef,
+                        x: f64, y: f64, width: f64, height: f64) -> Fallible<Root<DOMRectReadOnly>> {
+        Ok(DOMRectReadOnly::new(global, x, y, width, height))
+    }
+
+    pub fn set_x(&self, value: f64) {
+        self.x.set(value);
+    }
+
+    pub fn set_y(&self, value: f64) {
+        self.y.set(value);
+    }
+
+    pub fn set_width(&self, value: f64) {
+        self.width.set(value);
+    }
+
+    pub fn set_height(&self, value: f64) {
+        self.height.set(value);
+    }
+}
+
+impl DOMRectReadOnlyMethods for DOMRectReadOnly {
+    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-x
+    fn X(&self) -> f64 {
+        self.x.get()
+    }
+
+    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-y
+    fn Y(&self) -> f64 {
+        self.y.get()
+    }
+
+    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-width
+    fn Width(&self) -> f64 {
+        self.width.get()
+    }
+
+    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-height
+    fn Height(&self) -> f64 {
+        self.height.get()
+    }
+
+    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-top
+    fn Top(&self) -> f64 {
+        let height = self.height.get();
+        if height >= 0f64 { self.y.get() } else { self.y.get() + height }
+    }
+
+    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-right
+    fn Right(&self) -> f64 {
+        let width = self.width.get();
+        if width < 0f64 { self.x.get() } else { self.x.get() + width }
+    }
+
+    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-bottom
+    fn Bottom(&self) -> f64 {
+        let height = self.height.get();
+        if height < 0f64 { self.y.get() } else { self.y.get() + height }
+    }
+
+    // https://drafts.fxtf.org/geometry/#dom-domrectreadonly-left
+    fn Left(&self) -> f64 {
+        let width = self.width.get();
+        if width >= 0f64 { self.x.get() } else { self.x.get() + width }
+    }
+}
diff --git a/components/script/dom/element.rs b/components/script/dom/element.rs
index 651142df713..089d3199058 100644
--- a/components/script/dom/element.rs
+++ b/components/script/dom/element.rs
@@ -30,6 +30,7 @@ use dom::bindings::codegen::InheritTypes::{HTMLTemplateElementCast, HTMLTextArea
 use dom::bindings::codegen::InheritTypes::{NodeCast, NodeTypeId, TextCast};
 use dom::bindings::codegen::UnionTypes::NodeOrString;
 use dom::bindings::error::{Error, ErrorResult, Fallible};
+use dom::bindings::global::GlobalRef;
 use dom::bindings::js::{JS, LayoutJS, MutNullableHeap};
 use dom::bindings::js::{Root, RootedReference};
 use dom::bindings::utils::XMLName::InvalidXMLName;
@@ -1249,9 +1250,11 @@ impl ElementMethods for Element {
         let node = NodeCast::from_ref(self);
         let raw_rects = node.get_content_boxes();
         let rects = raw_rects.iter().map(|rect| {
-            DOMRect::new(win.r(),
-                         rect.origin.y, rect.origin.y + rect.size.height,
-                         rect.origin.x, rect.origin.x + rect.size.width)
+            DOMRect::new(GlobalRef::Window(win.r()),
+                         rect.origin.x.to_f64_px(),
+                         rect.origin.y.to_f64_px(),
+                         rect.size.width.to_f64_px(),
+                         rect.size.height.to_f64_px())
         });
         DOMRectList::new(win.r(), rects)
     }
@@ -1261,12 +1264,11 @@ impl ElementMethods for Element {
         let win = window_from_node(self);
         let node = NodeCast::from_ref(self);
         let rect = node.get_bounding_content_box();
-        DOMRect::new(
-            win.r(),
-            rect.origin.y,
-            rect.origin.y + rect.size.height,
-            rect.origin.x,
-            rect.origin.x + rect.size.width)
+        DOMRect::new(GlobalRef::Window(win.r()),
+                     rect.origin.x.to_f64_px(),
+                     rect.origin.y.to_f64_px(),
+                     rect.size.width.to_f64_px(),
+                     rect.size.height.to_f64_px())
     }
 
     // https://drafts.csswg.org/cssom-view/#dom-element-clienttop
diff --git a/components/script/dom/mod.rs b/components/script/dom/mod.rs
index 05d89c232df..c8179c3f0e3 100644
--- a/components/script/dom/mod.rs
+++ b/components/script/dom/mod.rs
@@ -220,6 +220,7 @@ pub mod dompoint;
 pub mod dompointreadonly;
 pub mod domrect;
 pub mod domrectlist;
+pub mod domrectreadonly;
 pub mod domstringmap;
 pub mod domtokenlist;
 pub mod element;
diff --git a/components/script/dom/webidls/DOMRect.webidl b/components/script/dom/webidls/DOMRect.webidl
index 6e0fe24b57d..9ea5933c3f9 100644
--- a/components/script/dom/webidls/DOMRect.webidl
+++ b/components/script/dom/webidls/DOMRect.webidl
@@ -3,12 +3,13 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-// http://dev.w3.org/fxtf/geometry/#DOMRect
-interface DOMRect {
-  readonly attribute float top;
-  readonly attribute float right;
-  readonly attribute float bottom;
-  readonly attribute float left;
-  readonly attribute float width;
-  readonly attribute float height;
+[Constructor(optional unrestricted double x = 0, optional unrestricted double y = 0,
+             optional unrestricted double width = 0, optional unrestricted double height = 0),
+ /*Exposed=(Window,Worker)*/]
+// https://drafts.fxtf.org/geometry/#domrect
+interface DOMRect : DOMRectReadOnly {
+    inherit attribute unrestricted double x;
+    inherit attribute unrestricted double y;
+    inherit attribute unrestricted double width;
+    inherit attribute unrestricted double height;
 };
diff --git a/components/script/dom/webidls/DOMRectReadOnly.webidl b/components/script/dom/webidls/DOMRectReadOnly.webidl
new file mode 100644
index 00000000000..937ed4eb478
--- /dev/null
+++ b/components/script/dom/webidls/DOMRectReadOnly.webidl
@@ -0,0 +1,29 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+[Constructor(optional unrestricted double x = 0, optional unrestricted double y = 0,
+             optional unrestricted double width = 0, optional unrestricted double height = 0),
+ /*Exposed=(Window,Worker)*/]
+// https://drafts.fxtf.org/geometry/#domrect
+interface DOMRectReadOnly {
+  // [NewObject] static DOMRectReadOnly fromRect(optional DOMRectInit other);
+
+  readonly attribute unrestricted double x;
+  readonly attribute unrestricted double y;
+  readonly attribute unrestricted double width;
+  readonly attribute unrestricted double height;
+  readonly attribute unrestricted double top;
+  readonly attribute unrestricted double right;
+  readonly attribute unrestricted double bottom;
+  readonly attribute unrestricted double left;
+};
+
+// https://drafts.fxtf.org/geometry/#dictdef-domrectinit
+dictionary DOMRectInit {
+  unrestricted double x = 0;
+  unrestricted double y = 0;
+  unrestricted double width = 0;
+  unrestricted double height = 0;
+};
diff --git a/tests/wpt/metadata-css/geometry-1_dev/html/DOMRect-001.htm.ini b/tests/wpt/metadata-css/geometry-1_dev/html/DOMRect-001.htm.ini
index d2c334283b1..582463bd683 100644
--- a/tests/wpt/metadata-css/geometry-1_dev/html/DOMRect-001.htm.ini
+++ b/tests/wpt/metadata-css/geometry-1_dev/html/DOMRect-001.htm.ini
@@ -1,53 +1,14 @@
 [DOMRect-001.htm]
   type: testharness
-  [testConstructor0]
-    expected: FAIL
-
-  [testConstructor4]
-    expected: FAIL
-
-  [testConstructor5]
-    expected: FAIL
-
-  [testConstructorNegativeWidth]
-    expected: FAIL
-
-  [testConstructorNegativeHeight]
-    expected: FAIL
-
-  [testConstructorNegativeWidthHeight]
-    expected: FAIL
-
   [testConstructorUndefined1]
     expected: FAIL
 
-  [testConstructorUndefined2]
-    expected: FAIL
-
-  [testConstructorString1]
-    expected: FAIL
-
-  [testConstructorString2]
-    expected: FAIL
-
   [testConstructorIllegal1]
     expected: FAIL
 
   [testConstructorIllegal2]
     expected: FAIL
 
-  [testSetReadOnlyAttributes]
-    expected: FAIL
-
-  [testSetAttributes]
-    expected: FAIL
-
-  [testConstructor1]
-    expected: FAIL
-
-  [testConstructor2]
-    expected: FAIL
-
-  [testConstructor3]
+  [testReadOnlyConstructorUndefined1]
     expected: FAIL
 
diff --git a/tests/wpt/metadata-css/geometry-1_dev/xhtml1/DOMRect-001.xht.ini b/tests/wpt/metadata-css/geometry-1_dev/xhtml1/DOMRect-001.xht.ini
index a1345a2bfbf..d23e08618a6 100644
--- a/tests/wpt/metadata-css/geometry-1_dev/xhtml1/DOMRect-001.xht.ini
+++ b/tests/wpt/metadata-css/geometry-1_dev/xhtml1/DOMRect-001.xht.ini
@@ -1,53 +1,11 @@
 [DOMRect-001.xht]
   type: testharness
-  [testConstructor0]
-    expected: FAIL
-
-  [testConstructor4]
-    expected: FAIL
-
-  [testConstructor5]
-    expected: FAIL
-
-  [testConstructorNegativeWidth]
-    expected: FAIL
-
-  [testConstructorNegativeHeight]
-    expected: FAIL
-
-  [testConstructorNegativeWidthHeight]
-    expected: FAIL
-
   [testConstructorUndefined1]
     expected: FAIL
 
-  [testConstructorUndefined2]
-    expected: FAIL
-
-  [testConstructorString1]
-    expected: FAIL
-
-  [testConstructorString2]
-    expected: FAIL
-
   [testConstructorIllegal1]
     expected: FAIL
 
   [testConstructorIllegal2]
     expected: FAIL
 
-  [testSetReadOnlyAttributes]
-    expected: FAIL
-
-  [testSetAttributes]
-    expected: FAIL
-
-  [testConstructor1]
-    expected: FAIL
-
-  [testConstructor2]
-    expected: FAIL
-
-  [testConstructor3]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-css/geometry-1_dev/xhtml1print/DOMRect-001.xht.ini b/tests/wpt/metadata-css/geometry-1_dev/xhtml1print/DOMRect-001.xht.ini
index a1345a2bfbf..d23e08618a6 100644
--- a/tests/wpt/metadata-css/geometry-1_dev/xhtml1print/DOMRect-001.xht.ini
+++ b/tests/wpt/metadata-css/geometry-1_dev/xhtml1print/DOMRect-001.xht.ini
@@ -1,53 +1,11 @@
 [DOMRect-001.xht]
   type: testharness
-  [testConstructor0]
-    expected: FAIL
-
-  [testConstructor4]
-    expected: FAIL
-
-  [testConstructor5]
-    expected: FAIL
-
-  [testConstructorNegativeWidth]
-    expected: FAIL
-
-  [testConstructorNegativeHeight]
-    expected: FAIL
-
-  [testConstructorNegativeWidthHeight]
-    expected: FAIL
-
   [testConstructorUndefined1]
     expected: FAIL
 
-  [testConstructorUndefined2]
-    expected: FAIL
-
-  [testConstructorString1]
-    expected: FAIL
-
-  [testConstructorString2]
-    expected: FAIL
-
   [testConstructorIllegal1]
     expected: FAIL
 
   [testConstructorIllegal2]
     expected: FAIL
 
-  [testSetReadOnlyAttributes]
-    expected: FAIL
-
-  [testSetAttributes]
-    expected: FAIL
-
-  [testConstructor1]
-    expected: FAIL
-
-  [testConstructor2]
-    expected: FAIL
-
-  [testConstructor3]
-    expected: FAIL
-
diff --git a/tests/wpt/mozilla/tests/mozilla/interfaces.html b/tests/wpt/mozilla/tests/mozilla/interfaces.html
index 5d20c9220c3..ef3ae24d9fe 100644
--- a/tests/wpt/mozilla/tests/mozilla/interfaces.html
+++ b/tests/wpt/mozilla/tests/mozilla/interfaces.html
@@ -82,6 +82,7 @@ var interfaceNamesInGlobalScope = [
   "DOMPoint",
   "DOMPointReadOnly",
   "DOMRect",
+  "DOMRectReadOnly",
   "Comment",
   "Console",
   "CustomEvent",