| // Copyright 2013 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 PendingChanges class tracks changes to be applied when an |
| * "Apply Changes" button is clicked. |
| */ |
| |
| /** |
| * Creates a PendingChanges object with no pending changes. |
| * |
| * @constructor |
| */ |
| var PendingChanges = function() { |
| // Format: pendingFontChanges_.Cyrl.sansserif = "My SansSerif Cyrillic Font" |
| this.pendingFontChanges_ = {}; |
| |
| // Format: pendingFontSizeChanges_.defaultFontSize = 12 |
| this.pendingFontSizeChanges_ = {}; |
| }; |
| |
| /** |
| * Returns the pending font setting change for the specified script and family, |
| * or null if it doesn't exist. |
| * |
| * @param {string} script The script code, like "Cyrl". |
| * @param {string} genericFamily The generic family, like "sansserif". |
| * @return {?string} The pending font setting, like "My Cyrillic SansSerif Font" |
| * or null if it doesn't exist. |
| */ |
| PendingChanges.prototype.getFont = function(script, genericFamily) { |
| if (this.pendingFontChanges_[script]) |
| return this.pendingFontChanges_[script][genericFamily]; |
| return null; |
| }; |
| |
| /** |
| * Returns the pending font size setting change, or null if it doesn't exist. |
| * |
| * @param {string} fontSizeKey The font size setting key. One of |
| * 'defaultFontSize', 'defaultFixedFontSize', or 'minFontSize'. |
| * @return {?number} The pending font size setting in pixels, or null if it |
| * doesn't exist. |
| */ |
| PendingChanges.prototype.getFontSize = function(fontSizeKey) { |
| return this.pendingFontSizeChanges_[fontSizeKey]; |
| }; |
| |
| /** |
| * Sets the pending font change for the specified script and family. |
| * |
| * @param {string} script The script code, like "Cyrl". |
| * @param {string} genericFamily The generic family, like "sansserif". |
| * @param {?string} font The font to set the setting to, or null to clear it. |
| */ |
| PendingChanges.prototype.setFont = function(script, genericFamily, font) { |
| if (!this.pendingFontChanges_[script]) |
| this.pendingFontChanges_[script] = {}; |
| if (this.pendingFontChanges_[script][genericFamily] == font) |
| return; |
| this.pendingFontChanges_[script][genericFamily] = font; |
| }; |
| |
| /** |
| * Sets the pending font size change. |
| * |
| * @param {string} fontSizeKey The font size setting key. See |
| * getFontSize(). |
| * @param {number} size The font size to set the setting to. |
| */ |
| PendingChanges.prototype.setFontSize = function(fontSizeKey, size) { |
| if (this.pendingFontSizeChanges_[fontSizeKey] == size) |
| return; |
| this.pendingFontSizeChanges_[fontSizeKey] = size; |
| }; |
| |
| /** |
| * Commits the pending changes to Chrome. After this function is called, there |
| * are no pending changes. |
| */ |
| PendingChanges.prototype.apply = function() { |
| for (var script in this.pendingFontChanges_) { |
| for (var genericFamily in this.pendingFontChanges_[script]) { |
| var fontId = this.pendingFontChanges_[script][genericFamily]; |
| if (fontId == null) |
| continue; |
| var details = {}; |
| details.script = script; |
| details.genericFamily = genericFamily; |
| details.fontId = fontId; |
| chrome.fontSettings.setFont(details); |
| } |
| } |
| |
| var size = this.pendingFontSizeChanges_['defaultFontSize']; |
| if (size != null) |
| chrome.fontSettings.setDefaultFontSize({pixelSize: size}); |
| |
| size = this.pendingFontSizeChanges_['defaultFixedFontSize']; |
| if (size != null) |
| chrome.fontSettings.setDefaultFixedFontSize({pixelSize: size}); |
| |
| size = this.pendingFontSizeChanges_['minFontSize']; |
| if (size != null) |
| chrome.fontSettings.setMinimumFontSize({pixelSize: size}); |
| |
| this.clear(); |
| }; |
| |
| /** |
| * Clears the pending font changes for a single script. |
| * |
| * @param {string} script The script code, like "Cyrl". |
| */ |
| PendingChanges.prototype.clearOneScript = function(script) { |
| this.pendingFontChanges_[script] = {}; |
| }; |
| |
| /** |
| * Clears all pending font changes. |
| */ |
| PendingChanges.prototype.clear = function() { |
| this.pendingFontChanges_ = {}; |
| this.pendingFontSizeChanges_ = {}; |
| }; |
| |
| /** |
| * @return {boolean} True if there are no pending changes, otherwise false. |
| */ |
| PendingChanges.prototype.isEmpty = function() { |
| for (var script in this.pendingFontChanges_) { |
| for (var genericFamily in this.pendingFontChanges_[script]) { |
| if (this.pendingFontChanges_[script][genericFamily] != null) |
| return false; |
| } |
| } |
| for (var name in this.pendingFontSizeChanges_) { |
| if (this.pendingFontSizeChanges_[name] != null) |
| return false; |
| } |
| return true; |
| }; |