docs/assets/gitbook/gitbook-plugin-fontsettings/fontsettings.js

250 lines
6.6 KiB
JavaScript

require(['gitbook', 'jquery'], function(gitbook, $) {
// Configuration
var MAX_SIZE = 4,
MIN_SIZE = 0,
BUTTON_ID;
// Current fontsettings state
var fontState;
// Default themes
var THEMES = [
{
config: 'white',
text: 'White',
id: 0
},
{
config: 'sepia',
text: 'Sepia',
id: 1
},
{
config: 'night',
text: 'Night',
id: 2
}
];
// Default font families
var FAMILIES = [
{
config: 'serif',
text: 'Serif',
id: 0
},
{
config: 'sans',
text: 'Sans',
id: 1
}
];
// Return configured themes
function getThemes() {
return THEMES;
}
// Modify configured themes
function setThemes(themes) {
THEMES = themes;
updateButtons();
}
// Return configured font families
function getFamilies() {
return FAMILIES;
}
// Modify configured font families
function setFamilies(families) {
FAMILIES = families;
updateButtons();
}
// Save current font settings
function saveFontSettings() {
gitbook.storage.set('fontState', fontState);
update();
}
// Increase font size
function enlargeFontSize(e) {
e.preventDefault();
if (fontState.size >= MAX_SIZE) return;
fontState.size++;
saveFontSettings();
}
// Decrease font size
function reduceFontSize(e) {
e.preventDefault();
if (fontState.size <= MIN_SIZE) return;
fontState.size--;
saveFontSettings();
}
// Change font family
function changeFontFamily(configName, e) {
if (e && e instanceof Event) {
e.preventDefault();
}
var familyId = getFontFamilyId(configName);
fontState.family = familyId;
saveFontSettings();
}
// Change type of color theme
function changeColorTheme(configName, e) {
if (e && e instanceof Event) {
e.preventDefault();
}
var $book = gitbook.state.$book;
var $header = $('.book-body > .book-header');
// Remove currently applied color theme
if (fontState.theme !== 0) {
$book.removeClass('color-theme-'+fontState.theme);
if ($header.length !== 0) {
$header.removeClass('color-theme-'+fontState.theme);
}
}
// Set new color theme
var themeId = getThemeId(configName);
fontState.theme = themeId;
if (fontState.theme !== 0) {
$book.addClass('color-theme-'+fontState.theme);
if ($header.length !== 0) {
$header.addClass('color-theme-'+fontState.theme);
}
}
saveFontSettings();
}
// Return the correct id for a font-family config key
// Default to first font-family
function getFontFamilyId(configName) {
// Search for plugin configured font family
var configFamily = $.grep(FAMILIES, function(family) {
return family.config == configName;
})[0];
// Fallback to default font family
return (!!configFamily)? configFamily.id : 0;
}
// Return the correct id for a theme config key
// Default to first theme
function getThemeId(configName) {
// Search for plugin configured theme
var configTheme = $.grep(THEMES, function(theme) {
return theme.config == configName;
})[0];
// Fallback to default theme
return (!!configTheme)? configTheme.id : 0;
}
function update() {
var $book = gitbook.state.$book;
$('.font-settings .font-family-list li').removeClass('active');
$('.font-settings .font-family-list li:nth-child('+(fontState.family+1)+')').addClass('active');
$book[0].className = $book[0].className.replace(/\bfont-\S+/g, '');
$book.addClass('font-size-'+fontState.size);
$book.addClass('font-family-'+fontState.family);
if(fontState.theme !== 0) {
$book[0].className = $book[0].className.replace(/\bcolor-theme-\S+/g, '');
$book.addClass('color-theme-'+fontState.theme);
}
}
function init(config) {
// Search for plugin configured font family
var configFamily = getFontFamilyId(config.family),
configTheme = getThemeId(config.theme);
// Instantiate font state object
fontState = gitbook.storage.get('fontState', {
size: config.size || 2,
family: configFamily,
theme: configTheme
});
update();
}
function updateButtons() {
// Remove existing fontsettings buttons
if (!!BUTTON_ID) {
gitbook.toolbar.removeButton(BUTTON_ID);
}
// Create buttons in toolbar
BUTTON_ID = gitbook.toolbar.createButton({
icon: 'fa fa-font',
label: 'Font Settings',
className: 'font-settings',
dropdown: [
[
{
text: 'A',
className: 'font-reduce',
onClick: reduceFontSize
},
{
text: 'A',
className: 'font-enlarge',
onClick: enlargeFontSize
}
],
$.map(FAMILIES, function(family) {
family.onClick = function(e) {
return changeFontFamily(family.config, e);
};
return family;
}),
$.map(THEMES, function(theme) {
theme.onClick = function(e) {
return changeColorTheme(theme.config, e);
};
return theme;
})
]
});
}
// Init configuration at start
gitbook.events.bind('start', function(e, config) {
var opts = config.fontsettings;
// Generate buttons at start
updateButtons();
// Init current settings
init(opts);
});
// Expose API
gitbook.fontsettings = {
enlargeFontSize: enlargeFontSize,
reduceFontSize: reduceFontSize,
setTheme: changeColorTheme,
setFamily: changeFontFamily,
getThemes: getThemes,
setThemes: setThemes,
getFamilies: getFamilies,
setFamilies: setFamilies
};
});