Add third_party/google-input-tools: Take 2

third_party/google_input_tools/src/chrome/os/inputview/elements/content/keyboardview.js

Index: third_party/google_input_tools/src/chrome/os/inputview/elements/content/keyboardview.js
diff --git a/third_party/google_input_tools/src/chrome/os/inputview/elements/content/keyboardview.js b/third_party/google_input_tools/src/chrome/os/inputview/elements/content/keyboardview.js
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index 0000000000000000000000000000000000000000..d7033c92f6b97714d407cd90cd066855ba442d91
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+++ b/third_party/google_input_tools/src/chrome/os/inputview/elements/content/keyboardview.js
@@ -0,0 +1,208 @@
+// Copyright 2014 The ChromeOS IME Authors. All Rights Reserved.
+// limitations under the License.
+// See the License for the specific language governing permissions and
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// Unless required by applicable law or agreed to in writing, software
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// You may obtain a copy of the License at
+// you may not use this file except in compliance with the License.
+// Licensed under the Apache License, Version 2.0 (the "License");
+//
+goog.provide('i18n.input.chrome.inputview.elements.content.KeyboardView');
+
+goog.require('goog.dom.classlist');
+goog.require('goog.object');
+goog.require('i18n.input.chrome.inputview.Css');
+goog.require('i18n.input.chrome.inputview.elements.ElementType');
+goog.require('i18n.input.chrome.inputview.elements.layout.VerticalLayout');
+
+
+goog.scope(function() {
+var layout = i18n.input.chrome.inputview.elements.layout;
+var content = i18n.input.chrome.inputview.elements.content;
+var ElementType = i18n.input.chrome.inputview.elements.ElementType;
+
+
+
+/**
+ * The layout view.
+ *
+ * @param {string} id The id.
+ * @param {goog.events.EventTarget=} opt_eventTarget The event target.
+ * @constructor
+ * @extends {layout.VerticalLayout}
+ */
+content.KeyboardView = function(id, opt_eventTarget) {
+  goog.base(this, id, opt_eventTarget, ElementType.LAYOUT_VIEW);
+};
+goog.inherits(content.KeyboardView, layout.VerticalLayout);
+var KeyboardView = content.KeyboardView;
+
+
+/**
+ * The maps of all the soft key view.
+ *
+ * @type {!Object.<string, !layout.SoftKeyView>}
+ * @private
+ */
+KeyboardView.prototype.softKeyViewMap_;
+
+
+/**
+ * The soft key map.
+ * Key: The character belongs to this key.
+ *
+ * @type {!Object.<string, !content.SoftKey>}
+ * @private
+ */
+KeyboardView.prototype.softKeyMap_;
+
+
+/**
+ * The mapping between soft key view id and soft key id.
+ *
+ * @type {!Object.<string, string>}
+ * @private
+ */
+KeyboardView.prototype.mapping_;
+
+
+/**
+ * The squared factor of the key width * key width. Assumes key1 and key2
+ * here, if the squared distance from the center of the key2 to the nearest
+ * edge of key1 is less than this factor * key1 width * key1 width, we
+ * take key2 as the nearby key of key1.
+ *
+ * @type {number}
+ * @private
+ */
+KeyboardView.SQUARED_NEARBY_FACTOR_ = 1.2;
+
+
+/** @override */
+KeyboardView.prototype.createDom = function() {
+  goog.base(this, 'createDom');
+
+  var elem = this.getElement();
+  goog.dom.classlist.add(elem, i18n.input.chrome.inputview.Css.LAYOUT_VIEW);
+};
+
+
+/**
+ * Sets up this keyboard view.
+ *
+ * @param {!Array.<content.SoftKey>} softKeyList The soft
+ *     key map.
+ * @param {!Object.<string, layout.SoftKeyView>} softKeyViewMap The soft key
+ *     view map.
+ * @param {!Object.<string, string>} mapping The mapping from soft key id
+ *     to soft key view id.
+ */
+KeyboardView.prototype.setUp = function(softKeyList, softKeyViewMap, mapping) {
+  this.softKeyMap_ = {};
+  this.softKeyViewMap_ = softKeyViewMap;
+  this.mapping_ = mapping;
+
+  for (var i = 0; i < softKeyList.length; i++) {
+    var sk = softKeyList[i];
+    var skv = this.softKeyViewMap_[mapping[sk.id]];
+    if (skv) {
+      skv.bindSoftKey(sk);
+    }
+    this.softKeyMap_[sk.id] = sk;
+  }
+};
+
+
+/**
+ * Gets the soft key whose id is equal to the code.
+ *
+ * @param {string} code The code of the key.
+ * @return {content.SoftKey} The soft key.
+ */
+KeyboardView.prototype.getViewForKey = function(code) {
+  if (code) {
+    return this.softKeyMap_[code];
+  }
+  return null;
+};
+
+
+/**
+ * Sets up the nearby keys mapping for each non-Functional key.
+ *
+ * @private
+ */
+KeyboardView.prototype.setUpNearbyKeys_ = function() {
+  var softKeys = goog.object.getValues(this.softKeyMap_);
+  for (var i = 0; i < softKeys.length; i++) {
+    var key1 = softKeys[i];
+    if (!this.isQualifiedForSpatial_(key1)) {
+      continue;
+    }
+    for (var j = i + 1; j < softKeys.length; j++) {
+      var key2 = softKeys[j];
+      if (this.isQualifiedForSpatial_(key2) && this.isNearby(key1, key2)) {
+        // We assume that if key2 is a nearby key for key1, then key1 is
+        // also a nearby key for key2.
+        key1.nearbyKeys.push(key2);
+        key2.nearbyKeys.push(key1);
+      }
+    }
+  }
+};
+
+
+/**
+ * We only consider character key or compact key to be qualified for spatial
+ * module.
+ *
+ * @param {!content.SoftKey} key .
+ * @return {boolean} .
+ * @private
+ */
+KeyboardView.prototype.isQualifiedForSpatial_ = function(key) {
+  return key.type == ElementType.CHARACTER_KEY ||
+      key.type == ElementType.COMPACT_KEY;
+};
+
+
+/**
+ * Checks if key2 is near key1, the algorithm is:
+ * 1. Finds out the nearest edge point of key1 to the center of key2.
+ * 2. Calculate the distance from the center of key2 to the nearest edge point.
+ * 3. If the distance is less than the factor(1.2) * key1 width * key1 width,
+ *     the key2 is nearby key1.
+ *
+ * @param {!content.SoftKey} key1 .
+ * @param {!content.SoftKey} key2 .
+ * @return {boolean} .
+ */
+KeyboardView.prototype.isNearby = function(key1, key2) {
+  var key2Center = key2.centerCoordinate;
+  var key1Left = key1.topLeftCoordinate.x;
+  var key1Right = key1Left + key1.width;
+  var key1Top = key1.topLeftCoordinate.y;
+  var key1Bottom = key1Top + key1.height;
+  var edgeX = key2Center.x < key1Left ? key1Left : (key2Center.x > key1Right ?
+      key1Right : key2Center.x);
+  var edgeY = key2Center.y < key1Top ? key1Top : (key2Center.y > key1Bottom ?
+      key1Bottom : key2Center.y);
+  var dx = key2Center.x - edgeX;
+  var dy = key2Center.y - edgeY;
+  return (dx * dx + dy * dy) < KeyboardView.
+      SQUARED_NEARBY_FACTOR_ * (key1.availableWidth * key1.availableWidth);
+};
+
+
+/** @override */
+KeyboardView.prototype.resize = function(width, height) {
+  goog.base(this, 'resize', width, height);
+
+  this.setUpNearbyKeys_();
+};
+
+});  // goog.scope