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// Copyright (c) 2011 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.
cr.define('options', function() {
var OptionsPage = options.OptionsPage;
/**
* FontSettings class
* Encapsulated handling of the 'Fonts and Encoding' page.
* @class
*/
function FontSettings() {
OptionsPage.call(this,
'fontSettings',
templateData.fontSettingsPageTabTitle,
'font-settings');
}
cr.addSingletonGetter(FontSettings);
FontSettings.prototype = {
__proto__: OptionsPage.prototype,
/**
* Initialize the page.
*/
initializePage: function() {
OptionsPage.prototype.initializePage.call(this);
var serifFontRange = $('serif-font-size');
serifFontRange.valueMap = $('fixed-font-size').valueMap = [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];
serifFontRange.continuous = false;
serifFontRange.fontSampleEl = $('serif-font-sample');
serifFontRange.notifyChange = this.rangeChanged_.bind(this);
var minimumFontRange = $('minimum-font-size');
minimumFontRange.valueMap = [9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20,
22, 24];
minimumFontRange.continuous = false;
minimumFontRange.fontSampleEl = $('minimum-font-sample');
minimumFontRange.notifyChange = this.rangeChanged_.bind(this);
minimumFontRange.notifyPrefChange =
this.minimumFontSizeChanged_.bind(this);
var placeholder = localStrings.getString('fontSettingsPlaceholder');
$('serif-font-family').appendChild(new Option(placeholder));
$('fixed-font-family').appendChild(new Option(placeholder));
$('font-encoding').appendChild(new Option(placeholder));
// Add an additional listener to the font select menu for the
// 'sansserif_font_family' preference.
$('serif-font-family').addEventListener('change',
function(e) {
Preferences.setStringPref('webkit.webprefs.sansserif_font_family',
this.options[this.selectedIndex].value, '');
});
},
/**
* Called by the options page when this page has been shown.
*/
didShowPage: function() {
// The fonts list may be large so we only load it when this page is
// loaded for the first time. This makes opening the options window
// faster and consume less memory if the user never opens the fonts
// dialog.
if (!this.hasShown) {
chrome.send('fetchFontsData');
this.hasShown = true;
}
},
/**
* Called as the user changes a non-continuous slider. This allows for
* reflecting the change in the UI before the preference has been changed.
* @param {Element} el The slider input element.
* @param {number} value The mapped value currently set by the slider.
* @private
*/
rangeChanged_: function(el, value) {
this.setupFontSample_(el.fontSampleEl, value,
el.fontSampleEl.style.fontFamily);
},
/**
* Sets the 'minimum_logical_font_size' preference when the minimum font
* size has been changed by the user.
* @param {Element} el The slider input element.
* @param {number} value The mapped value that has been saved.
* @private
*/
minimumFontSizeChanged_: function(el, value) {
Preferences.setIntegerPref('webkit.webprefs.minimum_logical_font_size',
value, '');
},
/**
* Sets the text, font size and font family of the sample text.
* @param {Element} el The div containing the sample text.
* @param {number} size The font size of the sample text.
* @param {string} font The font family of the sample text.
* @private
*/
setupFontSample_: function(el, size, font) {
el.textContent =
size + "pt: " + localStrings.getString('fontSettingsLoremIpsum');
el.style.fontSize = size + "pt";
if (font)
el.style.fontFamily = font;
},
/**
* Populates a select list and selects the specified item.
* @param {Element} element The select element to populate.
* @param {Array} items The array of items from which to populate.
* @param {string} selectedValue The selected item.
* @private
*/
populateSelect_: function(element, items, selectedValue) {
// Remove any existing content.
element.textContent = '';
// Insert new child nodes into select element.
var value, text, selected, option;
for (var i = 0; i < items.length; i++) {
value = items[i][0];
text = items[i][1];
selected = value == selectedValue;
element.appendChild(new Option(text, value, false, selected));
}
// Enable if not a managed pref.
if (!element.managed)
element.disabled = false;
}
};
// Chrome callbacks
FontSettings.setFontsData = function(fonts, encodings, selectedValues) {
FontSettings.getInstance().populateSelect_($('serif-font-family'), fonts,
selectedValues[0]);
FontSettings.getInstance().populateSelect_($('fixed-font-family'), fonts,
selectedValues[1]);
FontSettings.getInstance().populateSelect_($('font-encoding'), encodings,
selectedValues[2]);
};
FontSettings.setupSerifFontSample = function(font, size) {
FontSettings.getInstance().setupFontSample_($('serif-font-sample'), size,
font);
};
FontSettings.setupFixedFontSample = function(font, size) {
FontSettings.getInstance().setupFontSample_($('fixed-font-sample'), size,
font);
};
FontSettings.setupMinimumFontSample = function(size) {
FontSettings.getInstance().setupFontSample_($('minimum-font-sample'), size);
};
// Export
return {
FontSettings: FontSettings
};
});
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