Function PDFViewerPlugin

PDFViewerPlugin.js:28–374

()

function PDFViewerPlugin() {
    "use strict";

    function loadScript(path, callback) {
        var script = document.createElement('script');
        script.async = false;
        script.src = path;
        script.type = 'text/javascript';
        script.onload = callback || script.onload;
        document.getElementsByTagName('head')[0].appendChild(script);
    }

    function init(callback) {
        var pluginCSS;

        loadScript('./compatibility.js', function () {
            loadScript('./pdf.js');
            loadScript('./ui_utils.js');
            loadScript('./text_layer_builder.js');
            loadScript('./pdfjsversion.js', callback);
        });

        pluginCSS = /**@type{!HTMLStyleElement}*/(document.createElementNS(document.head.namespaceURI, 'style'));
        pluginCSS.setAttribute('media', 'screen, print, handheld, projection');
        pluginCSS.setAttribute('type', 'text/css');
        pluginCSS.appendChild(document.createTextNode(PDFViewerPlugin_css));
        document.head.appendChild(pluginCSS);
    }

    var self = this,
        pages = [],
        domPages = [],
        pageText = [],
        renderingStates = [],
        RENDERING = {
            BLANK: 0,
            RUNNING: 1,
            FINISHED: 2,
            RUNNINGOUTDATED: 3
        },
        TEXT_LAYER_RENDER_DELAY = 200, // ms
        container = null,
        pdfDocument = null,
        pageViewScroll = null,
        isGuessedSlideshow = true, // assume true as default, any non-matching page will unset this
        isPresentationMode = false,
        scale = 1,
        currentPage = 1,
        maxPageWidth = 0,
        maxPageHeight = 0,
        createdPageCount = 0;

    function scrollIntoView(elem) {
        elem.parentNode.scrollTop = elem.offsetTop;
    }

    function isScrolledIntoView(elem) {
        if (elem.style.display === "none") {