mirror of
https://github.com/janeczku/calibre-web
synced 2024-12-27 18:40:31 +00:00
681 lines
22 KiB
JavaScript
681 lines
22 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 screenfull, bitjs, Uint8Array, opera, loadArchiveFormats, archiveOpenFile */
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/* exported init, event */
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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 (typeof 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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SPACE: 32,
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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 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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direction: 0, // 0 = Left to Right, 1 = Right to Left
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nextPage: 0, // 0 = Reset to Top, 1 = Remember Position
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scrollbar: 1 // 0 = Hide Scrollbar, 1 = Show Scrollbar
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};
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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 = 0; // array.byteOffset;
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var len = array.byteLength;
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var blob;
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if (mimeType === "image/xml+svg") {
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var xmlStr = new TextDecoder("utf-8").decode(array);
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return "data:image/svg+xml;UTF-8," + encodeURIComponent(xmlStr);
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}
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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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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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switch (fileExtension) {
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case "jpg":
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case "jpeg":
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this.mimeType = "image/jpeg";
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break;
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case "png":
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this.mimeType = "image/png";
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break;
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case "gif":
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this.mimeType = "image/gif";
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break;
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case "svg":
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this.mimeType = "image/svg+xml";
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break;
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case "webp":
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this.mimeType = "image/webp";
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break;
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default:
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this.mimeType = undefined;
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break;
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}
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// Reset mime type for special files originating from Apple devices
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// This folder may contain files having image extensions (for example .jpg) but those files are not actual images
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// Trying to view these files cause corrupted/empty pages in the comic reader and files should be ignored
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if (this.filename.indexOf("__MACOSX") !== -1) {
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this.mimeType = undefined;
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}
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if ( this.mimeType !== undefined) {
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this.dataURI = createURLFromArray(file.fileData, this.mimeType);
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}
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};
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function initProgressClick() {
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$("#progress").click(function(e) {
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var offset = $(this).offset();
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var x = e.pageX - offset.left;
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var rate = settings.direction === 0 ? x / $(this).width() : 1 - x / $(this).width();
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currentImage = Math.max(1, Math.ceil(rate * totalImages)) - 1;
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updatePage();
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});
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}
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function loadFromArrayBuffer(ab) {
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var lastCompletion = 0;
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const collator = new Intl.Collator('en', { numeric: true, sensitivity: 'base' });
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loadArchiveFormats(['rar', 'zip', 'tar'], function() {
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// Open the file as an archive
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archiveOpenFile(ab, function (archive) {
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if (archive) {
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totalImages = archive.entries.length
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console.info('Uncompressing ' + archive.archive_type + ' ...');
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entries = archive.entries.sort((a,b) => collator.compare(a.name, b.name));
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entries.forEach(function(e, i) {
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updateProgress( (i + 1)/ totalImages * 100);
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if (e.is_file) {
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e.readData(function(d) {
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// add any new pages based on the filename
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if (imageFilenames.indexOf(e.name) === -1) {
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let data = {filename: e.name, fileData: d};
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var test = new kthoom.ImageFile(data);
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if (test.mimeType !== undefined) {
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imageFilenames.push(e.name);
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imageFiles.push(test);
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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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// display first page if we haven't yet
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if (imageFiles.length === currentImage + 1) {
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updatePage(lastCompletion);
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}
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} else {
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totalImages--;
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}
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}
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});
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}
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});
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}
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});
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});
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}
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function scrollTocToActive() {
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// Scroll to the thumbnail in the TOC on page change
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$("#tocView").stop().animate({
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scrollTop: $("#tocView a.active").position().top
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}, 200);
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}
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function updatePage() {
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$(".page").text((currentImage + 1 ) + "/" + totalImages);
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// Mark the current page in the TOC
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$("#tocView a[data-page]")
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// Remove the currently active thumbnail
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.removeClass("active")
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// Find the new one
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.filter("[data-page=" + (currentImage + 1) + "]")
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// Set it to active
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.addClass("active");
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scrollTocToActive();
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updateProgress();
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if (imageFiles[currentImage]) {
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setImage(imageFiles[currentImage].dataURI);
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} else {
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setImage("loading");
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}
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$("body").toggleClass("dark-theme", settings.theme === "dark");
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$("#mainContent").toggleClass("disabled-scrollbar", settings.scrollbar === 0);
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kthoom.setSettings();
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kthoom.saveSettings();
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}
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function updateProgress(loadPercentage) {
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if (settings.direction === 0) {
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$("#progress .bar-read")
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.removeClass("from-right")
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.addClass("from-left");
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$("#progress .bar-load")
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.removeClass("from-right")
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.addClass("from-left");
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} else {
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$("#progress .bar-read")
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.removeClass("from-left")
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.addClass("from-right");
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$("#progress .bar-load")
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.removeClass("from-left")
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.addClass("from-right");
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}
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// Set the load/unzip progress if it's passed in
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if (loadPercentage) {
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$("#progress .bar-load").css({ width: loadPercentage + "%" });
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if (loadPercentage === 100) {
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$("#progress")
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.removeClass("loading")
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.find(".load").text("");
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}
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}
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// Set page progress bar
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$("#progress .bar-read").css({ width: totalImages === 0 ? 0 : Math.round((currentImage + 1) / totalImages * 100) + "%"});
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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 = "black";
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x.textAlign = "center";
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x.font = "24px sans-serif";
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x.strokeStyle = "black";
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x.fillText("Loading Page #" + (currentImage + 1), innerWidth / 2, 100);
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} else {
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if (url === "error") {
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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 = "black";
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x.textAlign = "center";
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x.font = "24px sans-serif";
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x.strokeStyle = "black";
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x.fillText("Unable to decompress image #" + (currentImage + 1), innerWidth / 2, 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 = "black";
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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 + ")", innerWidth / 2, 100);
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x.fillStyle = "black";
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x.fillText("Is corrupt or not an image", innerWidth / 2, 200);
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var xhr = new XMLHttpRequest();
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if (/(html|htm)$/.test(imageFiles[currentImage].filename)) {
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xhr.open("GET", url, true);
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xhr.onload = function() {
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$("#mainText").css("display", "");
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$("#mainText").innerHTML("<iframe style=\"width:100%;height:700px;border:0\" src=\"data:text/html," + escape(xhr.responseText) + "\"></iframe>");
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};
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xhr.send(null);
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} else if (!/(jpg|jpeg|png|gif|webp)$/.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(false);
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canvas.style.display = "";
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$("body").css("overflowY", "");
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x.restore();
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};
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img.src = url;
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}
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}
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}
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function showLeftPage() {
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if (settings.direction === 0) {
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showPrevPage();
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} else {
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showNextPage();
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}
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}
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function showRightPage() {
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if (settings.direction === 0) {
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showNextPage();
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} else {
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showPrevPage();
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}
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}
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function showPrevPage() {
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currentImage--;
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if (currentImage < 0) {
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// Freeze on the current page.
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currentImage++;
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} else {
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updatePage();
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if (settings.nextPage === 0) {
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$("#mainContent").scrollTop(0);
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}
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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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if (settings.nextPage === 0) {
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$("#mainContent").scrollTop(0);
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}
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}
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}
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function updateScale(clear) {
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var mainImageStyle = getElem("mainImage").style;
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mainImageStyle.width = "";
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mainImageStyle.height = "";
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mainImageStyle.maxWidth = "";
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mainImageStyle.maxHeight = "";
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var maxheight = innerHeight - 50;
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if (!clear) {
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switch (settings.fitMode) {
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case kthoom.Key.B:
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mainImageStyle.maxWidth = "100%";
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mainImageStyle.maxHeight = maxheight + "px";
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break;
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case kthoom.Key.H:
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mainImageStyle.height = maxheight + "px";
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break;
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case kthoom.Key.W:
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mainImageStyle.width = "100%";
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break;
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default:
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break;
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}
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}
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$("#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 hasModifier = evt.ctrlKey || evt.shiftKey || evt.metaKey;
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switch (evt.keyCode) {
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case kthoom.Key.LEFT:
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if (hasModifier) break;
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showLeftPage();
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break;
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case kthoom.Key.RIGHT:
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if (hasModifier) break;
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showRightPage();
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break;
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case kthoom.Key.L:
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if (hasModifier) break;
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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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if (hasModifier) break;
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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 (hasModifier) break;
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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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if (hasModifier) break;
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settings.fitMode = kthoom.Key.W;
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updateScale(false);
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break;
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case kthoom.Key.H:
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if (hasModifier) break;
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settings.fitMode = kthoom.Key.H;
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updateScale(false);
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break;
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case kthoom.Key.B:
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if (hasModifier) break;
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settings.fitMode = kthoom.Key.B;
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updateScale(false);
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break;
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case kthoom.Key.N:
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if (hasModifier) break;
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settings.fitMode = kthoom.Key.N;
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updateScale(false);
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break;
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case kthoom.Key.SPACE:
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if (evt.shiftKey) {
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evt.preventDefault();
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// If it's Shift + Space and the container is at the top of the page
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showPrevPage();
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} else {
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evt.preventDefault();
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// If you're at the bottom of the page and you only pressed space
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showNextPage();
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}
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break;
|
|
default:
|
|
//console.log('KeyCode', evt.keyCode);
|
|
break;
|
|
}
|
|
}
|
|
|
|
function init(filename) {
|
|
var request = new XMLHttpRequest();
|
|
request.open("GET", filename);
|
|
request.responseType = "arraybuffer";
|
|
request.addEventListener("load", function() {
|
|
if (request.status >= 200 && request.status < 300) {
|
|
loadFromArrayBuffer(request.response);
|
|
} else {
|
|
console.warn(request.statusText, request.responseText);
|
|
}
|
|
});
|
|
request.send();
|
|
initProgressClick();
|
|
document.body.className += /AppleWebKit/.test(navigator.userAgent) ? " webkit" : "";
|
|
kthoom.loadSettings();
|
|
updateScale(true);
|
|
|
|
$(document).keydown(keyHandler);
|
|
|
|
$(window).resize(function() {
|
|
updateScale(false);
|
|
});
|
|
|
|
// Open TOC menu
|
|
$("#slider").click(function() {
|
|
$("#sidebar").toggleClass("open");
|
|
$("#main").toggleClass("closed");
|
|
$(this).toggleClass("icon-menu icon-right");
|
|
|
|
// We need this in a timeout because if we call it during the CSS transition, IE11 shakes the page ¯\_(ツ)_/¯
|
|
setTimeout(function() {
|
|
// Focus on the TOC or the main content area, depending on which is open
|
|
$("#main:not(.closed) #mainContent, #sidebar.open #tocView").focus();
|
|
scrollTocToActive();
|
|
}, 500);
|
|
});
|
|
|
|
// Open Settings modal
|
|
$("#setting").click(function() {
|
|
$("#settings-modal").toggleClass("md-show");
|
|
});
|
|
|
|
// On Settings input change
|
|
$("#settings input").on("change", function() {
|
|
// Get either the checked boolean or the assigned value
|
|
var value = this.type === "checkbox" ? this.checked : this.value;
|
|
|
|
// If it's purely numeric, parse it to an integer
|
|
value = /^\d+$/.test(value) ? parseInt(value) : value;
|
|
|
|
settings[this.name] = value;
|
|
updatePage();
|
|
updateScale(false);
|
|
});
|
|
|
|
// Close modal
|
|
$(".closer, .overlay").click(function() {
|
|
$(".md-show").removeClass("md-show");
|
|
});
|
|
|
|
// TOC thumbnail pagination
|
|
$("#thumbnails").on("click", "a", function() {
|
|
currentImage = $(this).data("page") - 1;
|
|
updatePage();
|
|
if (settings.nextPage === 0) {
|
|
$("#mainContent").scrollTop(0);
|
|
}
|
|
});
|
|
|
|
// Fullscreen mode
|
|
if (typeof screenfull !== "undefined") {
|
|
$("#fullscreen").click(function() {
|
|
screenfull.toggle($("#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");
|
|
});
|
|
}
|
|
}
|
|
|
|
// Focus the scrollable area so that keyboard scrolling work as expected
|
|
$("#mainContent").focus();
|
|
|
|
$("#mainContent").swipe( {
|
|
swipeRight:function() {
|
|
showLeftPage();
|
|
},
|
|
swipeLeft:function() {
|
|
showRightPage();
|
|
},
|
|
});
|
|
$("#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 clickedLeft = false;
|
|
switch (settings.rotateTimes) {
|
|
case 0:
|
|
clickedLeft = clickX < (comicWidth / 2);
|
|
break;
|
|
case 1:
|
|
clickedLeft = clickY < (comicHeight / 2);
|
|
break;
|
|
case 2:
|
|
clickedLeft = clickX > (comicWidth / 2);
|
|
break;
|
|
case 3:
|
|
clickedLeft = clickY > (comicHeight / 2);
|
|
break;
|
|
}
|
|
if (clickedLeft) {
|
|
showLeftPage();
|
|
} else {
|
|
showRightPage();
|
|
}
|
|
});
|
|
}
|
|
|