[cc] Initial checkin of cc-frame-viewer

tools/cc-frame-viewer/src/base/rect2.js

+// Copyright (c) 2012 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';
+
+/**
+ * @fileoverview Quick range computations.
+ */
+base.require('base.gl_matrix');
+
+base.exportTo('base', function() {
+
+  /**
+   * Tracks a 2D bounding box.
+   * @constructor
+   */
+  function Rect2() {
+    this.left = 0;
+    this.top = 0;
+    this.width = 0;
+    this.height = 0;
+  };
+  Rect2.FromXYWH = function(x, y, w, h) {
+    var rect = new Rect2();
+    rect.left = x;
+    rect.top = y;
+    rect.width = w;
+    rect.height = h;
+    return rect;
+  }
+
+  Rect2.prototype = {
+    __proto__: Object.prototype,
+
+    translateXY: function(x, y) {
+      this.left += x;
+      this.top += y;
+    },
+
+    enlarge: function(pad) {
+      this.left -= pad;
+      this.top -= pad;
+      this.width += 2*pad;
+      this.height += 2*pad;
+    },
+
+    get right() {
+      return this.left + this.width;
+    },
+
+    get bottom() {
+      return this.left + this.width;
+    }
+  };
+
+  return {
+    Rect2: Rect2
+  };
+
+});