[MD settings] adding font settings files

chrome/browser/resources/settings/appearance_page/appearance_fonts_page.js

+// Copyright 2015 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.
+
+/**
+ * This is the absolute difference maintained between standard and
+ * fixed-width font sizes. http://crbug.com/91922.
+ * @const
+ */
+var SIZE_DIFFERENCE_FIXED_STANDARD = 3;
+
+var FONT_SIZE_RANGE = [
+  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36,
+  40, 44, 48, 56, 64, 72,
+];
+
+var FONT_SIZE_RANGE_LIMIT = FONT_SIZE_RANGE.length - 1;
+
+var MINIMUM_FONT_SIZE_RANGE = [
+  6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 22, 24
+];
+
+var MINIMUM_FONT_SIZE_RANGE_LIMIT = MINIMUM_FONT_SIZE_RANGE.length - 1;
+
+/**
+ * 'settings-appearance-page' is the settings page containing appearance
+ * settings.
+ *
+ * Example:
+ *
+ *   <settings-appearance-fonts-page prefs="{{prefs}}">
+ *   </settings-appearance-fonts-page>
+ *
+ * @group Chrome Settings Elements
+ * @element settings-appearance-page
+ */
+Polymer({
+  is: 'settings-appearance-fonts-page',
+
+  properties: {
+    /**
+     * The font size used by default.
+     * @private
+     */
+    defaultFontSize_: {
+      type: Number,
+    },
+
+    /**
+     * The value of the font size slider.
+     * @private
+     */
+    fontSizeIndex_: {
+      type: Number,
+    },
+
+    /**
+     * Common font sizes.
+     * @private {!Array<number>}
+     */
+    fontSizeRange_: {
+      readOnly: true,
+      type: Array,
+      value: FONT_SIZE_RANGE,
+    },
+
+    /**
+     * Upper bound of the font size slider.
+     * @private
+     */
+    fontSizeRangeLimit_: {
+      readOnly: true,
+      type: Number,
+      value: MINIMUM_FONT_SIZE_RANGE_LIMIT,
+    },
+
+    /**
+     * The interactive value of the minimum font size slider.
+     * @private
+     */
+    immediateMinimumSizeIndex_: {
+      type: Number,
+    },
+
+    /**
+     * The interactive value of the font size slider.
+     * @private
+     */
+    immediateSizeIndex_: {
+      type: Number,
+    },
+
+    /**
+     * Reasonable, minimum font sizes.
+     * @private {!Array<number>}
+     */
+    minimumFontSizeRange_: {
+      readOnly: true,
+      type: Array,
+      value: MINIMUM_FONT_SIZE_RANGE,
+    },
+
+    /**
+     * Upper bound of the minimum font size slider.
+     * @private
+     */
+    minimumFontSizeRangeLimit_: {
+      readOnly: true,
+      type: Number,
+      value: MINIMUM_FONT_SIZE_RANGE_LIMIT,
+    },
+
+    /**
+     * The font size used at minimum.
+     * @private
+     */
+    minimumFontSize_: {
+      type: Number,
+    },
+
+    /**
+     * The value of the minimum font size slider.
+     * @private
+     */
+    minimumSizeIndex_: {
+      type: Number,
+    },
+
+    /**
+     * Preferences state.
+     * @type {!Object}

[stevenjb, 2015/10/29 19:56:02]

Not needed. In this case the entire pref store is just a dictionary (Object).

[dschuyler, 2015/11/04 22:10:56]

Done.

+     */
+    prefs: {
+      type: Object,
+      notify: true,
+    },
+  },
+
+  /**
+   * This is the absolute difference maintained between standard and
+   * fixed-width font sizes. http://crbug.com/91922.
+   * @const
+   */
+  SIZE_DIFFERENCE_FIXED_STANDARD: 3,
+
+  observers: [
+    'fontSizeChanged_(prefs.webkit.webprefs.default_font_size.value)',
+    'minimumFontSizeChanged_(prefs.webkit.webprefs.minimum_font_size.value)',
+  ],
+
+  ready: function() {
+    var self = this;
+    cr.define('Settings', function() {
+      return {
+        setFontsData: function() {
+          return self.setFontsData_.apply(self, arguments);
+        },
+      };
+    });
+    chrome.send('fetchFontsData');
+  },
+
+  /**
+   * @param {number} value The intermediate slider value.
+   * @private
+   */
+  immediateSizeIndexChanged_: function(value) {
+    this.set('prefs.webkit.webprefs.default_font_size.value',
+        this.fontSizeRange_[this.immediateSizeIndex_]);
+  },
+
+  /**
+   * @param {number} value The intermediate slider value.
+   * @private
+   */
+  immediateMinimumSizeIndexChanged_: function(value) {
+    this.set('prefs.webkit.webprefs.minimum_font_size.value',
+        this.minimumFontSizeRange_[this.immediateMinimumSizeIndex_]);
+  },
+
+  /**
+   * @param {!Array<{0: string, 1: (string|undefined), 2: (string|undefined)}>}
+   *   fontList The font menu options.
+   * @param {!Array<{0: string, 1: string}>} encodingList The encoding menu
+   *   options.
+   * @private
+   */
+  setFontsData_: function(fontList, encodingList) {
+    this.$.standardFont.menuOptions = fontList;
+    this.$.serifFont.menuOptions = fontList;
+    this.$.sansSerifFont.menuOptions = fontList;
+    this.$.fixedFont.menuOptions = fontList;
+    this.$.encoding.menuOptions = encodingList;
+  },
+
+  /**
+   * @param {number} value The changed font size slider value.
+   * @private
+   */
+  fontSizeChanged_: function(value) {
+    this.defaultFontSize_ = value;
+    if (!this.$.sizeSlider.dragging) {
+      this.fontSizeIndex_ = this.fontSizeRange_.indexOf(value);
+      this.set('prefs.webkit.webprefs.default_fixed_font_size.value',
+        value - SIZE_DIFFERENCE_FIXED_STANDARD);
+    }
+  },
+
+  /**
+   * @param {number} value The changed font size slider value.
+   * @private
+   */
+  minimumFontSizeChanged_: function(value) {
+    this.minimumFontSize_ = value;
+    if (!this.$.minimumSizeSlider.dragging)
+      this.minimumSizeIndex_ = this.minimumFontSizeRange_.indexOf(value);
+  },
+
+  /**
+   * Creates an html style value.
+   * @param {number} fontSize The font size to use.
+   * @param {string} fontFamily The name of the font family use.
+   * @private
+   */
+  computeStyle_: function(fontSize, fontFamily) {
+    return 'font-size: ' + fontSize + "px; font-family: '" + fontFamily + "';";
+  },
+});