Add third_party/google-input-tools: Take 2

third_party/google_input_tools/src/chrome/os/inputview/util.js

+// 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.util');
+
+goog.require('goog.string');
+goog.require('goog.style');
+
+
+goog.scope(function() {
+var util = i18n.input.chrome.inputview.util;
+
+
+/**
+ * The mapping between the real character and its replacement for display.
+ *
+ * @type {!Object.<string, string>}
+ */
+util.DISPLAY_MAPPING = {
+  '\u0300' : '\u0060',
+  '\u0301' : '\u00B4',
+  '\u0302' : '\u02C6',
+  '\u0303' : '\u02DC',
+  '\u0304' : '\u02c9',
+  '\u0305' : '\u00AF',
+  '\u0306' : '\u02D8',
+  '\u0307' : '\u02D9',
+  '\u0308' : '\u00a8',
+  '\u0309' : '\u02C0',
+  '\u030A' : '\u02DA',
+  '\u030B' : '\u02DD',
+  '\u030C' : '\u02C7',
+  '\u030D' : '\u02C8',
+  '\u030E' : '\u0022',
+  '\u0327' : '\u00B8',
+  '\u0328' : '\u02DB',
+  '\u0345' : '\u037A',
+  '\u030F' : '\u030F\u0020',
+  '\u031B' : '\u031B\u0020',
+  '\u0323' : '\u0323\u0020'
+};
+
+
+/**
+ * The keysets using US keyboard layouts.
+ *
+ * @type {!Array.<string>}
+ */
+util.KEYSETS_USE_US = [
+  'array',
+  'cangjie',
+  'dayi',
+  'jp_us',
+  'pinyin-zh-CN',
+  'pinyin-zh-TW',
+  'quick',
+  't13n',
+  'wubi',
+  'zhuyin'
+];
+
+
+/**
+ * The keysets that have en switcher key.
+ *
+ * @type {!Array.<string>}
+ */
+util.KEYSETS_HAVE_EN_SWTICHER = [
+  // When other keysets that use us add the enswitcher key,
+  // should move them to this array.
+  'pinyin-zh-CN'
+];
+
+
+/**
+ * A regular expression for the end of a sentence.
+ *
+ * @private {!RegExp}
+ */
+util.END_SENTENCE_REGEX_ = /[\.\?!] +$/;
+
+
+/**
+ * The regex of characters support dead key.
+ *
+ * @type {!RegExp}
+ * @private
+ */
+util.REGEX_CHARACTER_SUPPORT_DEADKEY_ =
+    /^[a-zA-ZæÆœŒΑΕΗΙΟΥΩαεηιυοωϒ]+$/;
+
+
+/**
+ * The regex of characters supported in language module.
+ *
+ * @type {!RegExp}
+ */
+util.REGEX_LANGUAGE_MODEL_CHARACTERS =
+    /(?=[^\u00d7\u00f7])[a-z\-\'\u00c0-\u017F]/i;
+
+
+/**
+ * Splits a value to pieces according to the weights.
+ *
+ * @param {!Array.<number>} weightArray The weight array.
+ * @param {number} totalValue The total value.
+ * @return {!Array.<number>} The splitted values.
+ */
+util.splitValue = function(weightArray, totalValue) {
+  if (weightArray.length == 0) {
+    return [];
+  }
+
+  if (weightArray.length == 1) {
+    return [totalValue];
+  }
+
+  var totalWeight = 0;
+  for (var i = 0; i < weightArray.length; i++) {
+    totalWeight += weightArray[i];
+  }
+  var tmp = totalValue / totalWeight;
+  var values = [];
+  var totalFlooredValue = 0;
+  var diffs = [];
+  for (var i = 0; i < weightArray.length; i++) {
+    var result = weightArray[i] * tmp;
+    values.push(result);
+    diffs.push(result - Math.floor(result));
+    totalFlooredValue += Math.floor(result);
+  }
+  var diff = totalValue - totalFlooredValue;
+
+  // Distributes the rest pixels to values who lose most.
+  for (var i = 0; i < diff; i++) {
+    var max = 0;
+    var index = 0;
+    for (var j = 0; j < diffs.length; j++) {
+      if (diffs[j] > max) {
+        max = diffs[j];
+        index = j;
+      }
+    }
+    values[index] += 1;
+    diffs[index] = 0;
+  }
+  for (var i = 0; i < values.length; i++) {
+    values[i] = Math.floor(values[i]);
+  }
+  return values;
+};
+
+
+/**
+ * Gets the value of a property.
+ *
+ * @param {Element} elem The element.
+ * @param {string} property The property name.
+ * @return {number} The value.
+ */
+util.getPropertyValue = function(elem, property) {
+  var value = goog.style.getComputedStyle(elem, property);
+  if (value) {
+    return parseInt(value.replace('px', ''), 10);
+  }
+  return 0;
+};
+
+
+/**
+ * To upper case.
+ *
+ * @param {string} character The character.
+ * @return {string} The uppercase of the character.
+ */
+util.toUpper = function(character) {
+  if (character == '\u00b5') {
+    return '\u005b5';
+  } else {
+    return character.toUpperCase();
+  }
+};
+
+
+/**
+ * To lower case.
+ *
+ * @param {string} character The character.
+ * @return {string} The lower case of the character.
+ */
+util.toLower = function(character) {
+  if (character == '\u0049') {
+    return '\u0131';
+  }
+  return character.toLowerCase();
+};
+
+
+/**
+ * Is this character trigger commit.
+ *
+ * @param {string} character The character.
+ * @return {boolean} True to trigger commit.
+ */
+util.isCommitCharacter = function(character) {
+  if (util.DISPLAY_MAPPING[character] ||
+      util.REGEX_LANGUAGE_MODEL_CHARACTERS.test(
+          character)) {
+    return false;
+  }
+
+  return true;
+};
+
+
+/**
+ * Some unicode character can't be shown in the web page, use a replacement
+ *     instead.
+ *
+ * @param {string} invisibleCharacter The character can't be shown.
+ * @return {string} The replacement.
+ */
+util.getVisibleCharacter = function(invisibleCharacter) {
+  var map = util.DISPLAY_MAPPING;
+  if (map[invisibleCharacter]) {
+    return map[invisibleCharacter];
+  }
+  return invisibleCharacter;
+};
+
+
+/**
+ * Whether this is a letter key.
+ *
+ * @param {!Array.<string>} characters The characters.
+ * @return {boolean} True if this is a letter key.
+ */
+util.isLetterKey = function(characters) {
+  if (characters[1] == util.toUpper(
+      characters[0]) || characters[1] == util.
+          toLower(characters[0])) {
+    return true;
+  }
+  return false;
+};
+
+
+/**
+ * True if this character supports dead key combination.
+ *
+ * @param {string} character The character.
+ * @return {boolean} True if supports the dead key combination.
+ */
+util.supportDeadKey = function(character) {
+  return util.REGEX_CHARACTER_SUPPORT_DEADKEY_.
+      test(character);
+};
+
+
+/**
+ * True if we need to do the auto-capitalize.
+ *
+ * @param {string} text .
+ * @return {boolean} .
+ */
+util.needAutoCap = function(text) {
+  if (goog.string.isEmpty(text)) {
+    return false;
+  } else {
+    return util.END_SENTENCE_REGEX_.test(text);
+  }
+};
+
+
+/**
+ * Returns the configuration file name from the keyboard code.
+ *
+ * @param {string} keyboardCode The keyboard code.
+ * @return {string} The config file name which contains the keyset.
+ */
+util.getConfigName = function(keyboardCode) {
+  // Strips out all the suffixes in the keyboard code.
+  return keyboardCode.replace(/\..*$/, '');
+};
+
+});  // goog.scope