972 lines
25 KiB
JavaScript
Executable file
972 lines
25 KiB
JavaScript
Executable file
/*jslint browser: true, on: true, eqeqeq: true, newcap: true, immed: true */
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/*
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TODOs:
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Fo sho:
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- trigger preload if requesting valid but not loaded images (can happen if network was interupted)
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- loading and generally hackiness of pointer is buggy, fix.
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- check for html5 feature support where used: diveintohtml5.org/everything.html or www.modernizr.com
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- when applying enhancements reading position gets lost
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- full browser test - IE9 / FF3.6+ / Chrome / Safari / Opera
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- don't inlcude the closure compiler, expect it (or similar) to be installed instead
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Nice 2 have:
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- lint
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- jump to page?
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- make page draggable with the cursor
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- enable menu items via config, allow for custom items
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- split out classes into seperate files
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- offline access
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- thumbnail browser
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- chrome frame / ExplorerCanvas / non canvas version?
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- really need to speed up enhancements, try to use webworkers
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- refactor so we are not using all these loose shared variables and other nastyness
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- use custom event emitters instead of hacky code
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*/
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/**
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* Merge two arrays. Any properties in b will replace the same properties in
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* a. New properties from b will be added to a.
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*
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* @param a {Object}
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* @param b {Object}
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*/
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function merge(a, b) {
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var prop;
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if (typeof b === "undefined") { b = {}; }
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for (prop in a) {
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if (a.hasOwnProperty(prop)) {
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if (prop in b) { continue; }
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b[prop] = a[prop];
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}
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}
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return b;
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}
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/**
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* Exception class. Always throw an instance of this when throwing exceptions.
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*
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* @param {String} type
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* @param {Object} object
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* @returns {ComicBookException}
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*/
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var ComicBookException = {
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INVALID_PAGE: "invalid page",
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INVALID_PAGE_TYPE: "invalid page type",
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UNDEFINED_CONTROL: "undefined control",
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INVALID_ZOOM_MODE: "invalid zoom mode",
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INVALID_NAVIGATION_EVENT: "invalid navigation event"
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};
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function ComicBook(id, srcs, opts) {
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var canvas_id = id; // canvas element id
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this.srcs = srcs; // array of image srcs for pages
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var defaults = {
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displayMode: "double", // single / double
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zoomMode: "fitWidth", // manual / fitWidth
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manga: false, // true / false
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enhance: {},
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keyboard: {
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next: 78,
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previous: 80,
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toolbar: 84,
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toggleLayout: 76
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},
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forward_buffer: 3
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};
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var options = merge(defaults, opts); // options array for internal use
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var no_pages = srcs.length;
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var pages = []; // array of preloaded Image objects
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var canvas; // the HTML5 canvas object
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var context; // the 2d drawing context
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var loaded = []; // the images that have been loaded so far
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var scale = 1; // page zoom scale, 1 = 100%
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var is_double_page_spread = false;
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var controlsRendered = false; // have the user controls been inserted into the dom yet?
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var page_requested = false; // used to request non preloaded pages
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var shiv = false;
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/**
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* Gets the window.innerWidth - scrollbars
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*/
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function windowWidth() {
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var height = window.innerHeight + 1;
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if (shiv === false) {
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shiv = $(document.createElement("div"))
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.attr("id", "cb-width-shiv")
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.css({
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width: "100%",
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position: "absolute",
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top: 0,
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zIndex: "-1000"
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});
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$("body").append(shiv);
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}
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shiv.height(height);
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return shiv.innerWidth();
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}
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/**
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* enables the back button
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*/
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function checkHash() {
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var hash = getHash();
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if (hash !== pointer && loaded.indexOf(hash) > -1) {
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pointer = hash;
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ComicBook.prototype.draw();
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}
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}
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function getHash() {
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var hash = parseInt(location.hash.substring(1),10) - 1 || 0;
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if (hash < 0) {
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setHash(0);
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hash = 0;
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}
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return hash;
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}
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function setHash(pageNo) {
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location.hash = pageNo;
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}
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// page hash on first load
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var hash = getHash();
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// the current page, can pass a default as a url hash
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var pointer = (hash < srcs.length) ? hash : 0;
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/**
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* Setup the canvas element for use throughout the class.
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*
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* @see #ComicBook.prototype.draw
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* @see #ComicBook.prototype.enhance
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*/
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function init() {
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// setup canvas
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canvas = document.getElementById(canvas_id);
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context = canvas.getContext("2d");
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// render user controls
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if (controlsRendered === false) {
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ComicBook.prototype.renderControls();
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controlsRendered = true;
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}
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// add page controls
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canvas.addEventListener("click", ComicBook.prototype.navigation, false);
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window.addEventListener("keydown", ComicBook.prototype.navigation, false);
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$(window).bind('hashchange', checkHash);
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}
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/**
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* User controls
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*
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* TODO: save current values
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*/
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ComicBook.prototype.control = {
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status: $(document.createElement("div"))
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.attr("id", "cb-status")
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.addClass("cb-control cb-always-on")
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.append(
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$(document.createElement("div"))
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.attr("id", "cb-progress-bar")
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.progressbar()
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),
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toolbar: $(document.createElement("div"))
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.attr("id", "cb-toolbar")
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.addClass("cb-control")
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.append(
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$(document.createElement("button"))
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.attr("title", "close the toolbar")
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.addClass("cb-close")
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.click(function(){
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ComicBook.prototype.toggleToolbar();
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})
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)
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.append(
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$(document.createElement("button"))
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.attr("title", "switch between dual and single page modes")
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.addClass("cb-layout " + options.displayMode)
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.click(function(){
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ComicBook.prototype.toggleLayout();
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})
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)
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.append(
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$(document.createElement("button"))
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.attr("title", "tweak the page colors")
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.addClass("cb-color cb-menu-button")
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.click(function(){
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ComicBook.prototype.toggleControl("color");
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})
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)
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.append(
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$(document.createElement("button"))
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.attr("title", "zoom out")
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.addClass("cb-zoom-out")
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.click(function(){
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ComicBook.prototype.zoom(scale - 0.1);
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})
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)
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.append(
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$(document.createElement("button"))
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.attr("title", "zoom in")
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.addClass("cb-zoom-in")
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.click(function(){
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ComicBook.prototype.zoom(scale + 0.1);
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})
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)
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.append(
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$(document.createElement("button"))
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.attr("title", "fit to page width")
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.addClass("cb-fit-width")
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.click(function(){
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options.zoomMode = "fitWidth"
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ComicBook.prototype.drawPage();
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})
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)
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.append(
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$(document.createElement("button"))
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.attr("title", "fit to page width/height")
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.addClass("cb-fit-best")
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.click(function(){
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options.zoomMode = "fitBest"
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ComicBook.prototype.drawPage();
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})
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)
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.append(
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$(document.createElement("button"))
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.attr("title", ((options.manga == true) ? "change reading direction to 'left-to-right'" : "change reading direction to 'right-to-left'"))
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.addClass("cb-read-direction")
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.click(function(){
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options.manga = !options.manga;
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ComicBook.prototype.drawPage();
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})
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.attr("id", ((options.manga == true) ? "toright" : "toleft"))
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)
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.append(
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$(document.createElement("p"))
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.attr("id", "cb-comic-info")
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.append("<span id='cb-current-page'></span> / " + srcs.length)
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),
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/**
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* Image enhancements
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*/
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color: $(document.createElement("div"))
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.attr("id", "cb-color")
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.addClass("cb-control")
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.append("<label for='cb-sharpen'>Brightness</label>")
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.append(
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$("<div id='cb-brightness' class='cb-option'></div>").slider({
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value: 0,
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step: 10,
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min: -1000,
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max: 1000,
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change: function(event, ui) {
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ComicBook.prototype.enhance.brightness({ brightness: ui.value });
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}
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})
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)
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.append("<label for='cb-sharpen'>Contrast</label>")
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.append(
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$("<div id='cb-contrast' class='cb-option'></div>").slider({
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value: 0,
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step: 0.001,
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min: 0,
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max: 1,
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change: function(event, ui) {
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ComicBook.prototype.enhance.brightness({ contrast: ui.value });
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}
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})
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)
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.append("<label for='cb-sharpen'>Sharpen</label>")
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.append(
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$("<div id='cb-sharpen' class='cb-option'></div>").slider({
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value: 0,
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step: 0.001,
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min: 0,
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max: 1,
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change: function(event, ui) {
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ComicBook.prototype.enhance.sharpen({ amount: ui.value });
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}
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})
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)
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.append(
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$(document.createElement("div")).addClass("cb-option")
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.append("<input type='checkbox' id='cb-desaturate' /> <label for='cb-desaturate'>Desaturate</label>")
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.append("<button id='cb-reset'>reset</button>")
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),
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/**
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* Page navigation
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*/
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navigation: {
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left: $(document.createElement("div"))
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.addClass("cb-control cb-navigate cb-always-on left")
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.click(function(e){
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if(options.manga == false)
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{
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ComicBook.prototype.drawPrevPage();
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}
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else
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{
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ComicBook.prototype.drawNextPage();
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}
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}),
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right: $(document.createElement("div"))
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.addClass("cb-control cb-navigate cb-always-on right")
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.click(function(e) {
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if(options.manga == false)
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{
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ComicBook.prototype.drawNextPage();
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}
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else
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{
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ComicBook.prototype.drawPrevPage();
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}
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})
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},
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loadingOverlay: $(document.createElement("div"))
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.attr("id", "cb-loading-overlay")
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.addClass("cb-control")
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};
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/*Using left arrow key*/
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$(document).keydown(function(e) {
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if (e.keyCode == 37) {
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ComicBook.prototype.drawPrevPage();
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}
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});
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/*Using right arrow key*/
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$(document).keydown(function(e) {
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if (e.keyCode == 39) {
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ComicBook.prototype.drawNextPage();
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}
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});
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ComicBook.prototype.renderControls = function() {
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$(canvas)
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.before(this.getControl("loadingOverlay"))
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.before(this.getControl("status"))
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.after(this.getControl("toolbar").hide())
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.after(this.getControl("navigation").left)
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.after(this.getControl("navigation").right)
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.after(this.getControl("color").hide());
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$(".cb-menu-button").click(function(e) {
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$(this).toggleClass("active");
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});
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$("#cb-desaturate").click(function(){
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if ($(this).is(":checked")) {
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ComicBook.prototype.enhance.desaturate();
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} else {
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ComicBook.prototype.enhance.resaturate();
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}
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});
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$("#cb-reset").click(function() {
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// TODO: improve performance here.
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$("#cb-brightness").slider("value", 0);
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$("#cb-contrast").slider("value", 0);
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$("#cb-saturation").slider("value", 0);
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$("#cb-sharpen").slider("value", 0);
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var desaturate = $("#cb-desaturate");
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desaturate.attr("checked", false);
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ComicBook.prototype.enhance.reset();
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});
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};
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ComicBook.prototype.getControl = function(control) {
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if (typeof this.control[control] === "undefined") {
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throw ComicBookException.UNDEFINED_CONTROL+' '+control;
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}
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return this.control[control];
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};
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ComicBook.prototype.showControl = function(control) {
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this.getControl(control).show().addClass("open");
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};
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ComicBook.prototype.hideControl = function(control) {
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this.getControl(control).removeClass("open").hide();
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};
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ComicBook.prototype.toggleControl = function(control) {
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this.getControl(control).toggle().toggleClass("open");
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};
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ComicBook.prototype.toggleToolbar = function() {
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if ($("#cb-toolbar").is(":visible")) {
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$(".cb-control").not(".cb-always-on").hide();
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} else {
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$("#cb-toolbar, .cb-control.open").show();
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}
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};
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ComicBook.prototype.toggleLayout = function() {
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if (options.displayMode === "double") {
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$("#cb-toolbar .cb-layout").removeClass("double");
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options.displayMode = "single";
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} else {
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$("#cb-toolbar .cb-layout").removeClass("single");
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options.displayMode = "double";
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}
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$("#cb-toolbar .cb-layout").addClass(options.displayMode);
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ComicBook.prototype.drawPage();
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};
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/**
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* Get the image for a given page.
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*
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* @return Image
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*/
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ComicBook.prototype.getPage = function(i) {
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if (i < 0 || i > srcs.length-1) {
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throw ComicBookException.INVALID_PAGE+' '+i;
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}
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if (typeof pages[i] === "object") {
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return pages[i];
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} else {
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page_requested = i;
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this.showControl("loadingOverlay");
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}
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};
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/**
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* @see #preload
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*/
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ComicBook.prototype.draw = function () {
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init();
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// resize navigation controls
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$(".cb-control.cb-navigate").outerHeight(window.innerHeight);
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$("#cb-toolbar").outerWidth(windowWidth());
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$("#cb-loading-overlay").outerWidth(windowWidth()).height(window.innerHeight);
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// preload images if needed
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if (pages.length !== no_pages) {
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this.preload();
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} else {
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this.drawPage();
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}
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};
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/**
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* Zoom the canvas
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*
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* @param new_scale {Number} Scale the canvas to this ratio
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*/
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ComicBook.prototype.zoom = function (new_scale) {
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options.zoomMode = "manual";
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scale = new_scale;
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if (typeof this.getPage(pointer) === "object") { this.drawPage(); }
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};
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/**
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* Preload all images, draw the page only after a given number have been loaded.
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*
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* @see #drawPage
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*/
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ComicBook.prototype.preload = function () {
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var i = pointer; // the current page counter for this method
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var rendered = false;
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var queue = [];
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this.showControl("loadingOverlay");
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function loadImage(i) {
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var page = new Image();
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page.src = srcs[i];
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page.onload = function () {
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pages[i] = this;
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loaded.push(i);
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$("#cb-progress-bar").progressbar("value", Math.floor((loaded.length / no_pages) * 100));
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// double page mode needs an extra page added
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var buffer = (options.displayMode === "double" && pointer < srcs.length-1) ? 1 : 0;
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// start rendering the comic when the requested page is ready
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if ((rendered === false && ($.inArray(pointer + buffer, loaded) !== -1)
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||
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(typeof page_requested === "number" && $.inArray(page_requested, loaded) !== -1))
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) {
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// if the user is waiting for a page to be loaded, render that one instead of the default pointer
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if (typeof page_requested === "number") {
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pointer = page_requested-1;
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page_requested = false;
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}
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ComicBook.prototype.drawPage();
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ComicBook.prototype.hideControl("loadingOverlay");
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rendered = true;
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}
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if (queue.length) {
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loadImage(queue[0]);
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queue.splice(0,1);
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} else {
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$("#cb-status").delay(500).fadeOut();
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}
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};
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}
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// loads pages in both directions so you don't have to wait for all pages
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// to be loaded before you can scroll backwards
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function preload(start, stop) {
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var j = 0;
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var count = 1;
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var forward = start;
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var backward = start-1;
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while (forward <= stop) {
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if (count > options.forward_buffer && backward > -1) {
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queue.push(backward);
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backward--;
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count = 0;
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} else {
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queue.push(forward);
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forward++;
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}
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count++;
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}
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while (backward > -1) {
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queue.push(backward);
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backward--;
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}
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loadImage(queue[j]);
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}
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preload(i, srcs.length-1);
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};
|
|
|
|
ComicBook.prototype.pageLoaded = function (page_no) {
|
|
return (typeof loaded[page_no-1] !== "undefined");
|
|
};
|
|
|
|
/**
|
|
* Draw the current page in the canvas
|
|
*/
|
|
ComicBook.prototype.drawPage = function(page_no) {
|
|
|
|
// if a specific page is given try to render it, if not bail and wait for preload() to render it
|
|
if (typeof page_no === "number" && page_no < srcs.length && page_no > 0) {
|
|
pointer = page_no-1;
|
|
if (!this.pageLoaded(page_no)) {
|
|
this.showControl("loadingOverlay");
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (pointer < 0) { pointer = 0; }
|
|
|
|
var zoom_scale;
|
|
var offsetW = 0, offsetH = 0;
|
|
|
|
var page = ComicBook.prototype.getPage(pointer);
|
|
var page2 = false;
|
|
|
|
if (options.displayMode === "double" && pointer < srcs.length-1) {
|
|
page2 = ComicBook.prototype.getPage(pointer + 1);
|
|
}
|
|
|
|
if (typeof page !== "object") {
|
|
throw ComicBookException.INVALID_PAGE_TYPE+' '+typeof page;
|
|
}
|
|
|
|
var width = page.width;
|
|
var height = page.height;
|
|
|
|
// reset the canvas to stop duplicate pages showing
|
|
canvas.width = 0;
|
|
canvas.height = 0;
|
|
|
|
// show double page spreads on a single page
|
|
is_double_page_spread = (
|
|
typeof page2 === "object"
|
|
&& (page.width > page.height || page2.width > page2.height)
|
|
&& options.displayMode === "double"
|
|
);
|
|
if (is_double_page_spread) { options.displayMode = "single"; }
|
|
|
|
if (options.displayMode === "double") {
|
|
|
|
// for double page spreads, factor in the width of both pages
|
|
if (typeof page2 === "object") { width += page2.width; }
|
|
|
|
// if this is the last page and there is no page2, still keep the canvas wide
|
|
else { width += width; }
|
|
}
|
|
|
|
// update the page scale if a non manual mode has been chosen
|
|
switch(options.zoomMode) {
|
|
|
|
case "manual":
|
|
document.body.style.overflowX = "auto";
|
|
zoom_scale = (options.displayMode === "double") ? scale * 2 : scale;
|
|
break;
|
|
|
|
case "fitWidth":
|
|
document.body.style.overflowX = "hidden";
|
|
|
|
zoom_scale = (windowWidth() > width)
|
|
? ((windowWidth() - width) / windowWidth()) + 1 // scale up if the window is wider than the page
|
|
: windowWidth() / width; // scale down if the window is narrower than the page
|
|
|
|
// update the interal scale var so switching zoomModes while zooming will be smooth
|
|
scale = zoom_scale
|
|
break;
|
|
|
|
case "fitBest":
|
|
document.body.style.overflowX = "hidden";
|
|
|
|
var width_scale = (windowWidth() > width)
|
|
? ((windowWidth() - width) / windowWidth()) + 1 // scale up if the window is wider than the page
|
|
: windowWidth() / width; // scale down if the window is narrower than the page
|
|
var windowHeight = window.innerHeight;
|
|
var height_scale = (windowHeight > height)
|
|
? ((windowHeight - height) / windowHeight) + 1 // scale up if the window is wider than the page
|
|
: windowHeight / height; // scale down if the window is narrower than the page
|
|
|
|
zoom_scale = (width_scale > height_scale)? height_scale : width_scale;
|
|
scale = zoom_scale;
|
|
break;
|
|
|
|
default:
|
|
throw ComicBookException.INVALID_ZOOM_MODE+' '+options.zoomMode;
|
|
}
|
|
|
|
var canvas_width = page.width * zoom_scale;
|
|
var canvas_height = page.height * zoom_scale;
|
|
|
|
var page_width = (options.zoomMode === "manual") ? page.width * scale : canvas_width;
|
|
var page_height = (options.zoomMode === "manual") ? page.height * scale : canvas_height;
|
|
|
|
canvas_height = page_height;
|
|
|
|
// make sure the canvas is always at least full screen, even if the page is more narrow than the screen
|
|
canvas.width = (canvas_width < windowWidth()) ? windowWidth() : canvas_width;
|
|
canvas.height = (canvas_height < window.innerHeight) ? window.innerHeight : canvas_height;
|
|
|
|
// work out a horizontal position that will keep the pages always centred
|
|
if (canvas_width < windowWidth() && options.zoomMode === "manual") {
|
|
offsetW = (windowWidth() - page_width) / 2;
|
|
if (options.displayMode === "double") { offsetW = offsetW - page_width / 2; }
|
|
}
|
|
|
|
// work out a vertical position that will keep the pages always centred
|
|
if (canvas_height < window.innerHeight && options.zoomMode === "manual") {
|
|
offsetH = (window.innerHeight - page_height) / 2;
|
|
}
|
|
|
|
// in manga double page mode reverse the page(s)
|
|
if (options.manga && options.displayMode === "double" && typeof page2 === "object") {
|
|
var tmpPage = page;
|
|
var tmpPage2 = page2;
|
|
page = tmpPage2;
|
|
page2 = tmpPage;
|
|
}
|
|
|
|
// draw the page(s)
|
|
context.drawImage(page, offsetW, offsetH, page_width, page_height);
|
|
if (options.displayMode === "double" && typeof page2 === "object") {
|
|
context.drawImage(page2, page_width + offsetW, offsetH, page_width, page_height);
|
|
}
|
|
|
|
// apply any image enhancements previously defined
|
|
$.each(options.enhance, function(action, options) {
|
|
ComicBook.prototype.enhance[action](options);
|
|
});
|
|
|
|
var current_page = (options.displayMode === "double" && pointer+2 <= srcs.length)
|
|
? (pointer+1) + "-" + (pointer+2) : pointer+1
|
|
$("#cb-current-page").text(current_page);
|
|
|
|
// revert page mode back to double if it was auto switched for a double page spread
|
|
if (is_double_page_spread) { options.displayMode = "double"; }
|
|
|
|
// disable the fit width button if needed
|
|
$("button.cb-fit-width").attr("disabled", (options.zoomMode === "fitWidth"));
|
|
$("button.cb-fit-best").attr("disabled", (options.zoomMode === "fitBest"));
|
|
|
|
//Change the icon on the read direction
|
|
if(options.manga == true)
|
|
{
|
|
$("button.cb-read-direction").attr("id", "toright");
|
|
}
|
|
else
|
|
{
|
|
$("button.cb-read-direction").attr("id", "toleft");
|
|
}
|
|
|
|
// disable prev/next buttons if not needed
|
|
$(".cb-navigate").show();
|
|
if ((pointer === 0) && (options.manga == false)) {
|
|
$(".cb-navigate.left").hide();
|
|
$(".cb-navigate.right").show();
|
|
}
|
|
else if ((pointer === 0) && (options.manga == true))
|
|
{
|
|
$(".cb-navigate.left").show();
|
|
$(".cb-navigate.right").hide();
|
|
}
|
|
|
|
if ((pointer === srcs.length-1 || (typeof page2 === "object" && pointer === srcs.length-2)) && (options.manga == false)) {
|
|
$(".cb-navigate.left").show();
|
|
$(".cb-navigate.right").hide();
|
|
}
|
|
else if ((pointer === srcs.length-1 || (typeof page2 === "object" && pointer === srcs.length-2)) && (options.manga == true))
|
|
{
|
|
$(".cb-navigate.left").hide();
|
|
$(".cb-navigate.right").show();
|
|
}
|
|
|
|
// user callback
|
|
if (typeof options.afterDrawPage === "function") {
|
|
options.afterDrawPage(pointer + 1);
|
|
}
|
|
|
|
// update hash location
|
|
if (getHash() !== pointer) {
|
|
setHash(pointer + 1);
|
|
}
|
|
|
|
// make sure the top of the page is in view
|
|
window.scroll(0, 0);
|
|
};
|
|
|
|
/**
|
|
* Increment the counter and draw the page in the canvas
|
|
*
|
|
* @see #drawPage
|
|
*/
|
|
ComicBook.prototype.drawNextPage = function () {
|
|
|
|
var page;
|
|
|
|
try {
|
|
page = this.getPage(pointer+1);
|
|
} catch (e) {}
|
|
|
|
if (!page) { return false; }
|
|
|
|
if (pointer + 1 < pages.length) {
|
|
pointer += (options.displayMode === "single" || is_double_page_spread) ? 1 : 2;
|
|
try {
|
|
this.drawPage();
|
|
} catch (e) {}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Decrement the counter and draw the page in the canvas
|
|
*
|
|
* @see #drawPage
|
|
*/
|
|
ComicBook.prototype.drawPrevPage = function () {
|
|
|
|
var page;
|
|
|
|
try {
|
|
page = this.getPage(pointer-1);
|
|
} catch (e) {}
|
|
|
|
if (!page) { return false; }
|
|
|
|
is_double_page_spread = (page.width > page.height); // need to run double page check again here as we are going backwards
|
|
|
|
if (pointer > 0) {
|
|
pointer -= (options.displayMode === "single" || is_double_page_spread) ? 1 : 2;
|
|
this.drawPage();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Apply image enhancements to the canvas.
|
|
*
|
|
* Powered by the awesome Pixastic: http://www.pixastic.com/
|
|
*
|
|
* TODO: reset & apply all image enhancements each time before applying new one
|
|
* TODO: abstract this into an "Enhance" object, separate from ComicBook?
|
|
*/
|
|
ComicBook.prototype.enhance = {
|
|
|
|
/**
|
|
* Reset enhancements.
|
|
* This can reset a specific enhancement if the method name is passed, or
|
|
* it will reset all.
|
|
*
|
|
* @param method {string} the specific enhancement to reset
|
|
*/
|
|
reset: function (method) {
|
|
if (!method) {
|
|
options.enhance = {};
|
|
} else {
|
|
delete options.enhance[method];
|
|
}
|
|
ComicBook.prototype.drawPage();
|
|
},
|
|
|
|
/**
|
|
* Adjust brightness / contrast
|
|
*
|
|
* params
|
|
* brightness (int) -150 to 150
|
|
* contrast: (float) -1 to infinity
|
|
*
|
|
* @param {Object} params Brightness & contrast levels
|
|
* @param {Boolean} reset Reset before applying more enhancements?
|
|
*/
|
|
brightness: function (params, reset) {
|
|
|
|
if (reset !== false) { this.reset("brightness"); }
|
|
|
|
// merge user options with defaults
|
|
var opts = merge({ brightness: 0, contrast: 0 }, params);
|
|
|
|
// remember options for later
|
|
options.enhance.brightness = opts;
|
|
|
|
// run the enhancement
|
|
Pixastic.process(canvas, "brightness", {
|
|
brightness: opts.brightness,
|
|
contrast: opts.contrast,
|
|
legacy: true
|
|
});
|
|
|
|
init();
|
|
},
|
|
|
|
/**
|
|
* Force black and white
|
|
*/
|
|
desaturate: function () {
|
|
|
|
options.enhance.desaturate = {};
|
|
|
|
Pixastic.process(canvas, "desaturate", { average : false });
|
|
|
|
init();
|
|
},
|
|
|
|
/**
|
|
* Undo desaturate
|
|
*/
|
|
resaturate: function() {
|
|
delete options.enhance.desaturate;
|
|
ComicBook.prototype.drawPage();
|
|
},
|
|
|
|
/**
|
|
* Sharpen
|
|
*
|
|
* options:
|
|
* amount: number (-1 to infinity)
|
|
*
|
|
* @param {Object} options
|
|
*/
|
|
sharpen: function (params) {
|
|
|
|
this.desharpen();
|
|
|
|
var opts = merge({ amount: 0 }, params);
|
|
|
|
options.enhance.sharpen = opts;
|
|
|
|
Pixastic.process(canvas, "sharpen", {
|
|
amount: opts.amount
|
|
});
|
|
|
|
init();
|
|
},
|
|
|
|
desharpen: function() {
|
|
delete options.enhance.sharpen;
|
|
ComicBook.prototype.drawPage();
|
|
}
|
|
};
|
|
|
|
ComicBook.prototype.navigation = function (e) {
|
|
|
|
// disable navigation when the overlay is showing
|
|
if ($("#cb-loading-overlay").is(":visible")) { return false; }
|
|
|
|
var side = false;
|
|
|
|
switch (e.type) {
|
|
case "click":
|
|
ComicBook.prototype.toggleToolbar();
|
|
break;
|
|
case "keydown":
|
|
|
|
// navigation
|
|
if (e.keyCode === options.keyboard.previous) { side = "left"; }
|
|
if (e.keyCode === options.keyboard.next) { side = "right"; }
|
|
|
|
// display controls
|
|
if (e.keyCode === options.keyboard.toolbar) {
|
|
ComicBook.prototype.toggleToolbar();
|
|
}
|
|
if (e.keyCode === options.keyboard.toggleLayout) {
|
|
ComicBook.prototype.toggleLayout();
|
|
}
|
|
break;
|
|
default:
|
|
throw ComicBookException.INVALID_NAVIGATION_EVENT+' '+e.type;
|
|
}
|
|
|
|
if (side) {
|
|
|
|
e.stopPropagation();
|
|
|
|
// western style (left to right)
|
|
if (!options.manga) {
|
|
if (side === "left") { ComicBook.prototype.drawPrevPage(); }
|
|
if (side === "right") { ComicBook.prototype.drawNextPage(); }
|
|
}
|
|
// manga style (right to left)
|
|
else {
|
|
if (side === "left") { ComicBook.prototype.drawNextPage(); }
|
|
if (side === "right") { ComicBook.prototype.drawPrevPage(); }
|
|
}
|
|
|
|
return false;
|
|
}
|
|
};
|
|
|
|
}
|