[WIP] Implement DOMPoint of geometry interface.

Source/core/dom/DOMPoint.js

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+'use strict';
+
+installClass('DOMPoint', function(global) {
+
+    var DOMPointPrototype = Object.create(DOMPointReadOnly.prototype);
+
+    DOMPointPrototype.initialize = function() {
+        // FIXME: How can we call parent initialize function?

[zino, 2014/07/17 13:54:30]

QUESTION #2: How can we call parent initialize function?

[haraken, 2014/07/17 15:01:58]

I think this should be handled by PrivateScriptRunner.cpp. If an interface A
inherits from an interface B and A's object is accessed, PrivateScriptRunner
should call A.initialize() and then B.initialize().

However, the mechanism is not yet implemented. (I'm happy if you implement it
:-)

+        // In general javascript, DOMPointReadOnly.call(this) or this.init()?
+        this.m_x = 0;
+        this.m_y = 0;
+        this.m_z = 0;
+        this.m_w = 1;
+    };
+
+    Object.defineProperty(DOMPointPrototype, "x", {
+        get: function() { return this.m_x; },

[zino, 2014/07/17 13:54:30]

QUESTION #3: This getter function is duplicated with DOMPointReadOnly.

[haraken, 2014/07/17 15:01:58]

As mentioned in DOMPoint.idl, inherit attributes are not supported in the IDL
compiler (before considering Blink-in-JS). If we really need it, we need to
implement it.

+        set: function(x) { this.m_x = x; }
+    });
+
+    Object.defineProperty(DOMPointPrototype, "y", {
+        get: function() { return this.m_y; },
+        set: function(y) { this.m_y = y; }
+    });
+
+    Object.defineProperty(DOMPointPrototype, "z", {
+        get: function() { return this.m_z; },
+        set: function(z) { this.m_z = z; }
+    });
+
+    Object.defineProperty(DOMPointPrototype, "w", {
+        get: function() { return this.m_w; },
+        set: function(w) { this.m_w = w; }
+    });
+
+    return DOMPointPrototype;
+});