gitbook.require(["gitbook", "lodash", "jQuery"], function(gitbook, _, $) { var fontState; var THEMES = { "white": 0, "sepia": 1, "night": 2 }; var FAMILY = { "serif": 0, "sans": 1 }; // Save current font settings function saveFontSettings() { gitbook.storage.set("fontState", fontState); update(); } // Increase font size function enlargeFontSize(e) { e.preventDefault(); if (fontState.size >= 4) return; fontState.size++; saveFontSettings(); }; // Decrease font size function reduceFontSize(e) { e.preventDefault(); if (fontState.size <= 0) return; fontState.size--; saveFontSettings(); }; // Change font family function changeFontFamily(index, e) { e.preventDefault(); fontState.family = index; saveFontSettings(); }; // Change type of color function changeColorTheme(index, e) { e.preventDefault(); var $book = $(".book"); if (fontState.theme !== 0) $book.removeClass("color-theme-"+fontState.theme); fontState.theme = index; if (fontState.theme !== 0) $book.addClass("color-theme-"+fontState.theme); saveFontSettings(); }; 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) { var $bookBody, $book; //Find DOM elements. $book = gitbook.state.$book; $bookBody = $book.find(".book-body"); // Instantiate font state object fontState = gitbook.storage.get("fontState", { size: config.size || 2, family: FAMILY[config.family || "sans"], theme: THEMES[config.theme || "white"] }); update(); }; gitbook.events.bind("start", function(e, config) { var opts = config.fontsettings; // Create buttons in toolbar 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 } ], [ { text: 'Serif', onClick: _.partial(changeFontFamily, 0) }, { text: 'Sans', onClick: _.partial(changeFontFamily, 1) } ], [ { text: 'White', onClick: _.partial(changeColorTheme, 0) }, { text: 'Sepia', onClick: _.partial(changeColorTheme, 1) }, { text: 'Night', onClick: _.partial(changeColorTheme, 2) } ] ] }); // Init current settings init(opts); }); });