mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-06 09:20:31 +00:00
603 lines
20 KiB
JavaScript
603 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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if (!window.console) {
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window.console = {};
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window.console.log = function(str) {};
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window.console.dir = function(str) {};
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}
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if (window.opera) {
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window.console.log = function(str) {opera.postError(str);};
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window.console.dir = function(str) {};
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}
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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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window.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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// The rotation orientation of the comic.
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kthoom.rotateTimes = 0;
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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 library = {
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allBooks: [],
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currentBookNum: 0,
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};
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var hflip = false, vflip = false, fitMode = kthoom.Key.B;
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var canKeyNext = true, canKeyPrev = true;
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kthoom.saveSettings = function() {
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localStorage.kthoom_settings = JSON.stringify({
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rotateTimes: kthoom.rotateTimes,
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hflip: hflip,
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vflip: vflip,
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fitMode: fitMode
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});
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}
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kthoom.loadSettings = function() {
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try {
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if (localStorage.kthoom_settings.length < 10) return;
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var s = JSON.parse(localStorage.kthoom_settings);
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kthoom.rotateTimes = s.rotateTimes;
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hflip = s.hflip;
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vflip = s.vflip;
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fitMode = s.fitMode;
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} catch(err) {
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}
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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' : undefined;
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this.dataURI = 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]; // document.getElementById('progress');
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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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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, opt_label) {
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var 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 (opt_label) {
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labelText = opt_label + ' ' + 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 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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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 start = (new Date).getTime();
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var h = new Uint8Array(ab, 0, 10);
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var pathToBitJS = '../../static/js/';
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if (h[0] == 0x52 && h[1] == 0x61 && h[2] == 0x72 && h[3] == 0x21) { //Rar!
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unarchiver = new bitjs.archive.Unrarrer(ab, pathToBitJS);
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} else if (h[0] == 80 && h[1] == 75) { //PK (Zip)
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unarchiver = new bitjs.archive.Unzipper(ab, pathToBitJS);
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} else { // Try with tar
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unarchiver = new bitjs.archive.Untarrer(ab, pathToBitJS);
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}
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// Listen for UnarchiveEvents.
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if (unarchiver) {
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unarchiver.addEventListener(bitjs.archive.UnarchiveEvent.Type.PROGRESS,
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function(e) {
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var percentage = e.currentBytesUnarchived / e.totalUncompressedBytesInArchive;
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totalImages = e.totalFilesInArchive;
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kthoom.setProgressMeter(percentage, 'Unzipping');
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// display nav
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lastCompletion = percentage * 100;
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});
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unarchiver.addEventListener(bitjs.archive.UnarchiveEvent.Type.EXTRACT,
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function(e) {
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// convert DecompressedFile into a bunch of ImageFiles
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if (e.unarchivedFile) {
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var f = e.unarchivedFile;
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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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}
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}
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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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unarchiver.addEventListener(bitjs.archive.UnarchiveEvent.Type.FINISH,
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function(e) {
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var diff = ((new Date).getTime() - start)/1000;
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console.log('Unarchiving done in ' + diff + 's');
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});
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unarchiver.start();
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} else {
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alert('Some error');
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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 bb, 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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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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}
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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(e) {
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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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if (/(html|htm)$/.test(imageFiles[currentImage].filename)) {
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var xhr = new XMLHttpRequest();
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xhr.open('GET', url, true);
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xhr.onload = function() {
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//document.getElementById('mainText').style.display = '';
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$("#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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var xhr = new XMLHttpRequest();
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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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kthoom.rotateTimes = (4 + kthoom.rotateTimes) % 4;
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x.save();
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if (kthoom.rotateTimes % 2 == 1) { sh = w; sw = h;}
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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 * kthoom.rotateTimes);
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x.translate(-w/2, -h/2);
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if (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 (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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if (library.allBooks.length == 1) {
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currentImage = imageFiles.length - 1;
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} else if (library.currentBookNum > 0) {
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loadPrevBook();
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} else {
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// Freeze on the current page.
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currentImage++;
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return;
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}
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}
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updatePage();
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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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if (library.allBooks.length == 1) {
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currentImage = 0;
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} else if (library.currentBookNum < library.allBooks.length - 1) {
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loadNextBook();
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} else {
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// Freeze on the current page.
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currentImage--;
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return;
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}
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}
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updatePage();
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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 - 15;
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if (!/main/.test(getElem('titlebar').className)) {
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maxheight -= 25;
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}
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if (clear || fitMode == kthoom.Key.N) {
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} else if (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 (fitMode == kthoom.Key.H) {
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mainImageStyle.height = maxheight + 'px';
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} else if (fitMode == kthoom.Key.W) {
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mainImageStyle.width = '100%';
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}
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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 (getComputedStyle(getElem('progress')).display == 'none') return;
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canKeyNext = ((document.body.offsetWidth+document.body.scrollLeft)/ document.body.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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if (canKeyPrev) showPrevPage();
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break;
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case kthoom.Key.RIGHT:
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if (canKeyNext) showNextPage();
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break;
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case kthoom.Key.L:
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kthoom.rotateTimes--;
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if (kthoom.rotateTimes < 0) {
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kthoom.rotateTimes = 3;
|
|
}
|
|
updatePage();
|
|
break;
|
|
case kthoom.Key.R:
|
|
kthoom.rotateTimes++;
|
|
if (kthoom.rotateTimes > 3) {
|
|
kthoom.rotateTimes = 0;
|
|
}
|
|
updatePage();
|
|
break;
|
|
case kthoom.Key.F:
|
|
if (!hflip && !vflip) {
|
|
hflip = true;
|
|
} else if(hflip == true) {
|
|
vflip = true;
|
|
hflip = false;
|
|
} else if(vflip == true) {
|
|
vflip = false;
|
|
}
|
|
updatePage();
|
|
break;
|
|
case kthoom.Key.W:
|
|
fitMode = kthoom.Key.W;
|
|
updateScale();
|
|
break;
|
|
case kthoom.Key.H:
|
|
fitMode = kthoom.Key.H;
|
|
updateScale();
|
|
break;
|
|
case kthoom.Key.B:
|
|
fitMode = kthoom.Key.B;
|
|
updateScale();
|
|
break;
|
|
case kthoom.Key.N:
|
|
fitMode = kthoom.Key.N;
|
|
updateScale();
|
|
break;
|
|
default:
|
|
//console.log('KeyCode = ' + code);
|
|
break;
|
|
}
|
|
}
|
|
|
|
function init(filename) {
|
|
if (!window.FileReader) {
|
|
alert('Sorry, kthoom will not work with your browser because it does not support the File API. Please try kthoom with Chrome 12+ or Firefox 7+');
|
|
} else {
|
|
var request = new XMLHttpRequest();
|
|
request.open("GET",filename);
|
|
request.responseType="arraybuffer";
|
|
request.setRequestHeader("X-Test","test1");
|
|
request.setRequestHeader("X-Test","test2");
|
|
request.addEventListener('load', function(event) {
|
|
if (request.status >= 200 && request.status < 300) {
|
|
loadFromArrayBuffer(request.response);
|
|
} else {
|
|
console.warn(request.statusText, request.responseText);
|
|
}
|
|
});
|
|
request.send();
|
|
kthoom.initProgressMeter();
|
|
document.body.className += /AppleWebKit/.test(navigator.userAgent) ? ' webkit' : '';
|
|
kthoom.loadSettings();
|
|
$(document).keydown(keyHandler);
|
|
|
|
$(window).resize(function() {
|
|
var f = (screen.width - innerWidth < 4 && screen.height - innerHeight < 4);
|
|
getElem('titlebar').className = f ? 'main' : '';
|
|
updateScale();
|
|
});
|
|
|
|
$('#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 = getElem('mainContent').clientWidth;
|
|
var mainContentHeight = getElem('mainContent').clientHeight;
|
|
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 (kthoom.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();
|
|
}
|
|
});
|
|
}
|
|
}
|