651 lines
20 KiB
JavaScript
651 lines
20 KiB
JavaScript
/*
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* kthoom.js
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*
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* Licensed under the MIT License
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*
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* Copyright(c) 2011 Google Inc.
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* Copyright(c) 2011 antimatter15
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*/
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/* Reference Documentation:
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* Web Workers: http://www.whatwg.org/specs/web-workers/current-work/
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* Web Workers in Mozilla: https://developer.mozilla.org/En/Using_web_workers
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* File API (FileReader): http://www.w3.org/TR/FileAPI/
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* Typed Arrays: http://www.khronos.org/registry/typedarray/specs/latest/#6
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*/
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/* global bitjs */
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var start=0;
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if (window.opera) {
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window.console.log = function(str) {
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opera.postError(str);
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};
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}
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var kthoom;
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// gets the element with the given id
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function getElem(id) {
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if (document.documentElement.querySelector) {
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// querySelector lookup
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return document.body.querySelector("#" + id);
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}
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// getElementById lookup
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return document.getElementById(id);
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}
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if (window.kthoom === undefined) {
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kthoom = {};
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}
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// key codes
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kthoom.Key = {
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ESCAPE: 27,
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LEFT: 37,
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UP: 38,
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RIGHT: 39,
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DOWN: 40,
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A: 65, B: 66, C: 67, D: 68, E: 69, F: 70, G: 71, H: 72, I: 73, J: 74, K: 75, L: 76, M: 77,
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N: 78, O: 79, P: 80, Q: 81, R: 82, S: 83, T: 84, U: 85, V: 86, W: 87, X: 88, Y: 89, Z: 90,
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QUESTION_MARK: 191,
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LEFT_SQUARE_BRACKET: 219,
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RIGHT_SQUARE_BRACKET: 221
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};
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// global variables
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var unarchiver = null;
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var currentImage = 0;
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var imageFiles = [];
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var imageFilenames = [];
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var totalImages = 0;
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var lastCompletion = 0;
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var settings = {
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hflip: false,
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vflip: false,
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rotateTimes: 0,
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fitMode: kthoom.Key.B,
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theme: 'light'
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};
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var canKeyNext = true, canKeyPrev = true;
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kthoom.saveSettings = function() {
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localStorage.kthoomSettings = JSON.stringify(settings);
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};
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kthoom.loadSettings = function() {
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try {
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if (!localStorage.kthoomSettings){
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return;
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}
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$.extend(settings, JSON.parse(localStorage.kthoomSettings));
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kthoom.setSettings();
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} catch (err) {
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alert("Error load settings");
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}
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};
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kthoom.setSettings = function() {
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// Set settings control values
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$.each(settings, function(key, value) {
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if (typeof value === "boolean") {
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$('input[name='+key+']').prop('checked', value);
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} else {
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$('input[name='+key+']').val([value]);
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}
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});
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};
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var createURLFromArray = function(array, mimeType) {
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var offset = array.byteOffset, len = array.byteLength;
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var url;
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var blob;
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// TODO: Move all this browser support testing to a common place
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// and do it just once.
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// Blob constructor, see http://dev.w3.org/2006/webapi/FileAPI/#dfn-Blob.
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if (typeof Blob === "function") {
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blob = new Blob([array], {type: mimeType});
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} else {
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throw "Browser support for Blobs is missing.";
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}
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if (blob.slice) {
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blob = blob.slice(offset, offset + len, mimeType);
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} else {
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throw "Browser support for Blobs is missing.";
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}
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if ((typeof URL !== "function" && typeof URL !== "object") ||
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typeof URL.createObjectURL !== "function") {
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throw "Browser support for Object URLs is missing";
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}
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return URL.createObjectURL(blob);
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};
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// Stores an image filename and its data: URI.
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// TODO: investigate if we really need to store as base64 (leave off ;base64 and just
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// non-safe URL characters are encoded as %xx ?)
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// This would save 25% on memory since base64-encoded strings are 4/3 the size of the binary
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kthoom.ImageFile = function(file) {
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this.filename = file.filename;
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/*var fileExtension = file.filename.split(".").pop().toLowerCase();
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var mimeType = fileExtension === "png" ? "image/png" :
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(fileExtension === "jpg" || fileExtension === "jpeg") ? "image/jpeg" :
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fileExtension === "gif" ? "image/gif" : null;*/
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this.dataURI = file.fileData; // createURLFromArray(file.fileData, mimeType);
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this.data = file;
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};
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kthoom.initProgressMeter = function() {
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var svgns = "http://www.w3.org/2000/svg";
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var pdiv = $("#progress")[0];
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var svg = document.createElementNS(svgns, "svg");
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svg.style.width = "100%";
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svg.style.height = "100%";
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var defs = document.createElementNS(svgns, "defs");
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var patt = document.createElementNS(svgns, "pattern");
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patt.id = "progress_pattern";
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patt.setAttribute("width", "30");
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patt.setAttribute("height", "20");
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patt.setAttribute("patternUnits", "userSpaceOnUse");
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var rect = document.createElementNS(svgns, "rect");
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rect.setAttribute("width", "100%");
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rect.setAttribute("height", "100%");
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rect.setAttribute("fill", "#cc2929");
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var poly = document.createElementNS(svgns, "polygon");
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poly.setAttribute("fill", "yellow");
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poly.setAttribute("points", "15,0 30,0 15,20 0,20");
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patt.appendChild(rect);
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patt.appendChild(poly);
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defs.appendChild(patt);
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svg.appendChild(defs);
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var g = document.createElementNS(svgns, "g");
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var outline = document.createElementNS(svgns, "rect");
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outline.setAttribute("y", "1");
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outline.setAttribute("width", "100%");
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outline.setAttribute("height", "15");
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outline.setAttribute("fill", "#777");
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outline.setAttribute("stroke", "white");
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outline.setAttribute("rx", "5");
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outline.setAttribute("ry", "5");
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g.appendChild(outline);
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var title = document.createElementNS(svgns, "text");
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title.id = "progress_title";
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title.appendChild(document.createTextNode("0%"));
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title.setAttribute("y", "13");
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title.setAttribute("x", "99.5%");
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title.setAttribute("fill", "white");
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title.setAttribute("font-size", "12px");
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title.setAttribute("text-anchor", "end");
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g.appendChild(title);
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var meter = document.createElementNS(svgns, "rect");
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meter.id = "meter";
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meter.setAttribute("width", "0%");
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meter.setAttribute("height", "17");
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meter.setAttribute("fill", "url(#progress_pattern)");
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meter.setAttribute("rx", "5");
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meter.setAttribute("ry", "5");
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var meter2 = document.createElementNS(svgns, "rect");
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meter2.id = "meter2";
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meter2.setAttribute("width", "0%");
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meter2.setAttribute("height", "17");
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meter2.setAttribute("opacity", "0.8");
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meter2.setAttribute("fill", "#007fff");
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meter2.setAttribute("rx", "5");
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meter2.setAttribute("ry", "5");
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g.appendChild(meter);
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g.appendChild(meter2);
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var page = document.createElementNS(svgns, "text");
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page.id = "page";
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page.appendChild(document.createTextNode("0/0"));
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page.setAttribute("y", "13");
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page.setAttribute("x", "0.5%");
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page.setAttribute("fill", "white");
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page.setAttribute("font-size", "12px");
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g.appendChild(page);
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svg.appendChild(g);
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pdiv.appendChild(svg);
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var l;
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svg.onclick = function(e) {
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for (var x = pdiv, l = 0; x !== document.documentElement; x = x.parentNode) l += x.offsetLeft;
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var page = Math.max(1, Math.ceil(((e.clientX - l) / pdiv.offsetWidth) * totalImages)) - 1;
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currentImage = page;
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updatePage();
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};
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}
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kthoom.setProgressMeter = function(pct, optLabel) {
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pct = (pct * 100);
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var part = 1 / totalImages;
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var remain = ((pct - lastCompletion) / 100) / part;
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var fract = Math.min(1, remain);
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var smartpct = ((imageFiles.length / totalImages) + (fract * part)) * 100;
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if (totalImages === 0) smartpct = pct;
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// + Math.min((pct - lastCompletion), 100/totalImages * 0.9 + (pct - lastCompletion - 100/totalImages)/2, 100/totalImages);
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var oldval = parseFloat(getElem("meter").getAttribute("width"));
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if (isNaN(oldval)) oldval = 0;
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var weight = 0.5;
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smartpct = ((weight * smartpct) + ((1 - weight) * oldval));
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if (pct === 100) smartpct = 100;
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if (!isNaN(smartpct)) {
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getElem("meter").setAttribute("width", smartpct + "%");
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}
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var title = getElem("progress_title");
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while (title.firstChild) title.removeChild(title.firstChild);
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var labelText = pct.toFixed(2) + "% " + imageFiles.length + "/" + totalImages + "";
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if (optLabel) {
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labelText = optLabel + " " + labelText;
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}
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title.appendChild(document.createTextNode(labelText));
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getElem("meter2").setAttribute("width",
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100 * (totalImages === 0 ? 0 : ((currentImage + 1) / totalImages)) + "%");
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var titlePage = getElem("page");
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while (titlePage.firstChild) titlePage.removeChild(titlePage.firstChild);
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titlePage.appendChild(document.createTextNode( (currentImage + 1) + "/" + totalImages ));
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if (pct > 0) {
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//getElem('nav').className = '';
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getElem("progress").className = "";
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}
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}
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function loadFromArrayBuffer(ab) {
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var f=[];
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f.fileData=ab.content;
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f.filename=ab.name;
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// add any new pages based on the filename
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if (imageFilenames.indexOf(f.filename) === -1) {
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imageFilenames.push(f.filename);
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imageFiles.push(new kthoom.ImageFile(f));
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// add thumbnails to the TOC list
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$('#thumbnails').append(
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"<li> \
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<a data-page='"+ imageFiles.length +"'> \
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<img src='"+ imageFiles[imageFiles.length - 1].dataURI +"' /> \
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<span>"+ imageFiles.length +"</span> \
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</a> \
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</li>"
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);
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//}
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}
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var percentage = (ab.page+1) / (ab.last+1);
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totalImages = ab.last+1;
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kthoom.setProgressMeter(percentage, "Unzipping");
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lastCompletion = percentage * 100;
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// display first page if we haven't yet
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if (imageFiles.length === currentImage + 1) {
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updatePage();
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}
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}
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function updatePage() {
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var title = getElem("page");
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while (title.firstChild) title.removeChild(title.firstChild);
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title.appendChild(document.createTextNode( (currentImage + 1 ) + "/" + totalImages ));
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getElem("meter2").setAttribute("width",
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100 * (totalImages === 0 ? 0 : ((currentImage + 1 ) / totalImages)) + "%");
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if (imageFiles[currentImage]) {
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setImage(imageFiles[currentImage].dataURI);
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} else {
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setImage("loading");
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}
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$('body').toggleClass('dark-theme', settings.theme === 'dark');
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kthoom.setSettings();
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kthoom.saveSettings();
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}
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function setImage(url) {
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var canvas = $("#mainImage")[0];
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var x = $("#mainImage")[0].getContext("2d");
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$("#mainText").hide();
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if (url === "loading") {
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updateScale(true);
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canvas.width = innerWidth - 100;
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canvas.height = 200;
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x.fillStyle = "red";
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x.font = "50px sans-serif";
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x.strokeStyle = "black";
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x.fillText("Loading Page #" + (currentImage + 1), 100, 100);
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} else {
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if ($("body").css("scrollHeight") / innerHeight > 1) {
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$("body").css("overflowY", "scroll");
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}
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var img = new Image();
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img.onerror = function() {
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canvas.width = innerWidth - 100;
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canvas.height = 300;
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updateScale(true);
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x.fillStyle = "orange";
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x.font = "50px sans-serif";
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x.strokeStyle = "black";
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x.fillText("Page #" + (currentImage + 1) + " (" +
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imageFiles[currentImage].filename + ")", 100, 100);
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x.fillStyle = "red";
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x.fillText("Is corrupt or not an image", 100, 200);
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var xhr = new XMLHttpRequest();
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if (/(html|htm)$/.test(imageFiles[currentImage].filename)) {
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xhr.open("GET", url, true);
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xhr.onload = function() {
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//document.getElementById('mainText').style.display = '';
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$("#mainText").css("display", "");
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$("#mainText").innerHTML("<iframe style=\"width:100%;height:700px;border:0\" src=\"data:text/html," + escape(xhr.responseText) + "\"></iframe>");
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}
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xhr.send(null);
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} else if (!/(jpg|jpeg|png|gif)$/.test(imageFiles[currentImage].filename) && imageFiles[currentImage].data.uncompressedSize < 10 * 1024) {
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xhr.open("GET", url, true);
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xhr.onload = function() {
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$("#mainText").css("display", "");
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$("#mainText").innerText(xhr.responseText);
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};
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xhr.send(null);
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}
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};
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img.onload = function() {
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var h = img.height,
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w = img.width,
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sw = w,
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sh = h;
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settings.rotateTimes = (4 + settings.rotateTimes) % 4;
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x.save();
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if (settings.rotateTimes % 2 === 1) {
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sh = w;
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sw = h;
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}
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canvas.height = sh;
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canvas.width = sw;
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x.translate(sw / 2, sh / 2);
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x.rotate(Math.PI / 2 * settings.rotateTimes);
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x.translate(-w / 2, -h / 2);
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if (settings.vflip) {
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x.scale(1, -1);
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x.translate(0, -h);
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}
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if (settings.hflip) {
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x.scale(-1, 1);
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x.translate(-w, 0);
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}
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canvas.style.display = "none";
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scrollTo(0, 0);
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x.drawImage(img, 0, 0);
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updateScale();
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canvas.style.display = "";
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$("body").css("overflowY", "");
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x.restore();
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};
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img.src = url;
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}
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}
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function showPrevPage() {
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currentImage--;
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if (currentImage < 0) {
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// Freeze on the current page.
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currentImage++;
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} else {
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updatePage();
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}
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}
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function showNextPage() {
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currentImage++;
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if (currentImage >= Math.max(totalImages, imageFiles.length)) {
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// Freeze on the current page.
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currentImage--;
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} else {
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updatePage();
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}
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}
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function updateScale(clear) {
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var mainImageStyle = getElem("mainImage").style;
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mainImageStyle.width = "";
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mainImageStyle.height = "";
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mainImageStyle.maxWidth = "";
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mainImageStyle.maxHeight = "";
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var maxheight = innerHeight - 50;
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if (clear || settings.fitMode === kthoom.Key.N) {
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} else if (settings.fitMode === kthoom.Key.B) {
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mainImageStyle.maxWidth = "100%";
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mainImageStyle.maxHeight = maxheight + "px";
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} else if (settings.fitMode === kthoom.Key.H) {
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mainImageStyle.height = maxheight + "px";
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} else if (settings.fitMode === kthoom.Key.W) {
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mainImageStyle.width = "100%";
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}
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$('#mainContent').css({maxHeight: maxheight + 5});
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kthoom.setSettings();
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kthoom.saveSettings();
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}
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function keyHandler(evt) {
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var code = evt.keyCode;
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if ($("#progress").css("display") === "none"){
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return;
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}
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canKeyNext = (($("body").css("offsetWidth") + $("body").css("scrollLeft")) / $("body").css("scrollWidth")) >= 1;
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canKeyPrev = (scrollX <= 0);
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if (evt.ctrlKey || evt.shiftKey || evt.metaKey) return;
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switch (code) {
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case kthoom.Key.LEFT:
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showPrevPage();
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break;
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case kthoom.Key.RIGHT:
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showNextPage();
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break;
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case kthoom.Key.L:
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settings.rotateTimes--;
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if (settings.rotateTimes < 0) {
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settings.rotateTimes = 3;
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}
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updatePage();
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break;
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case kthoom.Key.R:
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settings.rotateTimes++;
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if (settings.rotateTimes > 3) {
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settings.rotateTimes = 0;
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}
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updatePage();
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break;
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case kthoom.Key.F:
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if (!settings.hflip && !settings.vflip) {
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settings.hflip = true;
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} else if (settings.hflip === true && settings.vflip === true) {
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settings.vflip = false;
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settings.hflip = false;
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} else if (settings.hflip === true) {
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settings.vflip = true;
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settings.hflip = false;
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} else if (settings.vflip === true) {
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settings.hflip = true;
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}
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updatePage();
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break;
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case kthoom.Key.W:
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settings.fitMode = kthoom.Key.W;
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updateScale();
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break;
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case kthoom.Key.H:
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settings.fitMode = kthoom.Key.H;
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updateScale();
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break;
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case kthoom.Key.B:
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settings.fitMode = kthoom.Key.B;
|
|
updateScale();
|
|
break;
|
|
case kthoom.Key.N:
|
|
settings.fitMode = kthoom.Key.N;
|
|
updateScale();
|
|
break;
|
|
default:
|
|
//console.log('KeyCode = ' + code);
|
|
break;
|
|
}
|
|
}
|
|
|
|
function ImageLoadCallback(event) {
|
|
var jso=this.response;
|
|
if (jso.page !== jso.last)
|
|
{
|
|
// var secRequest = new XMLHttpRequest();
|
|
this.open("GET", this.fileid + "/"+(jso.page+1));
|
|
this.addEventListener("load",ImageLoadCallback);
|
|
this.send();
|
|
}
|
|
else
|
|
{
|
|
var diff = ((new Date).getTime() - start)/1000;
|
|
console.log('Transfer done in ' + diff + 's');
|
|
}
|
|
loadFromArrayBuffer(jso);
|
|
}
|
|
function init(fileid) {
|
|
start = (new Date).getTime();
|
|
var request = new XMLHttpRequest();
|
|
request.open("GET", fileid);
|
|
request.responseType = "json";
|
|
request.fileid=fileid.substring(0,fileid.length - 2);
|
|
request.addEventListener("load",ImageLoadCallback);
|
|
request.send();
|
|
kthoom.initProgressMeter();
|
|
document.body.className += /AppleWebKit/.test(navigator.userAgent) ? " webkit" : "";
|
|
kthoom.loadSettings();
|
|
updateScale(true);
|
|
$(document).keydown(keyHandler);
|
|
|
|
$(window).resize(function() {
|
|
updateScale();
|
|
});
|
|
|
|
// Open TOC menu
|
|
$("#slider").click(function(evt) {
|
|
$('#sidebar').toggleClass('open');
|
|
$('#main').toggleClass('closed');
|
|
$(this).toggleClass('icon-menu icon-right');
|
|
});
|
|
|
|
// Open Settings modal
|
|
$("#setting").click(function(evt) {
|
|
$("#settings-modal").toggleClass('md-show');
|
|
});
|
|
|
|
// On Settings input change
|
|
$("#settings input").on("change", function(evt){
|
|
// Get either the checked boolean or the assigned value
|
|
var value = this.type === 'checkbox' ? this.checked : this.value;
|
|
|
|
// If it's purely numeric, parse it to an integer
|
|
value = /^\d+$/.test(value) ? parseInt(value) : value;
|
|
|
|
settings[this.name] = value;
|
|
updatePage();
|
|
updateScale();
|
|
});
|
|
|
|
// Close modal
|
|
$(".closer, .overlay").click(function(evt) {
|
|
$(".md-show").removeClass('md-show');
|
|
});
|
|
|
|
// TOC thumbnail pagination
|
|
$('#thumbnails').on("click", "a", function(evt) {
|
|
currentImage = $(this).data('page') - 1;
|
|
updatePage();
|
|
});
|
|
|
|
// Fullscreen mode
|
|
if (typeof screenfull !== "undefined") {
|
|
$('#fullscreen').click(function(evt) {
|
|
screenfull.toggle($("#container")[0])
|
|
});
|
|
|
|
if (screenfull.raw) {
|
|
var $button = $('#fullscreen');
|
|
document.addEventListener(screenfull.raw.fullscreenchange,function(){
|
|
screenfull.isFullscreen
|
|
? $button.addClass("icon-resize-small").removeClass("icon-resize-full")
|
|
: $button.addClass("icon-resize-full").removeClass("icon-resize-small")
|
|
});
|
|
}
|
|
}
|
|
|
|
$("#mainImage").click(function(evt) {
|
|
// Firefox does not support offsetX/Y so we have to manually calculate
|
|
// where the user clicked in the image.
|
|
var mainContentWidth = $("#mainContent").width();
|
|
var mainContentHeight = $("#mainContent").height();
|
|
var comicWidth = evt.target.clientWidth;
|
|
var comicHeight = evt.target.clientHeight;
|
|
var offsetX = (mainContentWidth - comicWidth) / 2;
|
|
var offsetY = (mainContentHeight - comicHeight) / 2;
|
|
var clickX = !!evt.offsetX ? evt.offsetX : (evt.clientX - offsetX);
|
|
var clickY = !!evt.offsetY ? evt.offsetY : (evt.clientY - offsetY);
|
|
|
|
// Determine if the user clicked/tapped the left side or the
|
|
// right side of the page.
|
|
var clickedPrev = false;
|
|
switch (settings.rotateTimes) {
|
|
case 0:
|
|
clickedPrev = clickX < (comicWidth / 2);
|
|
break;
|
|
case 1:
|
|
clickedPrev = clickY < (comicHeight / 2);
|
|
break;
|
|
case 2:
|
|
clickedPrev = clickX > (comicWidth / 2);
|
|
break;
|
|
case 3:
|
|
clickedPrev = clickY > (comicHeight / 2);
|
|
break;
|
|
}
|
|
if (clickedPrev) {
|
|
showPrevPage();
|
|
} else {
|
|
showNextPage();
|
|
}
|
|
});
|
|
}
|