calibre-web/cps/static/js/kthoom.js

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JavaScript
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/*
* kthoom.js
*
* Licensed under the MIT License
*
* Copyright(c) 2011 Google Inc.
* Copyright(c) 2011 antimatter15
*/
/* Reference Documentation:
* Web Workers: http://www.whatwg.org/specs/web-workers/current-work/
* Web Workers in Mozilla: https://developer.mozilla.org/En/Using_web_workers
* File API (FileReader): http://www.w3.org/TR/FileAPI/
* Typed Arrays: http://www.khronos.org/registry/typedarray/specs/latest/#6
*/
if (!window.console) {
window.console = {};
window.console.log = function(str) {};
window.console.dir = function(str) {};
}
if (window.opera) {
window.console.log = function(str) {opera.postError(str);};
window.console.dir = function(str) {};
}
// gets the element with the given id
function getElem(id) {
if (document.documentElement.querySelector) {
// querySelector lookup
return document.body.querySelector('#' + id);
}
// getElementById lookup
return document.getElementById(id);
}
if (window.kthoom == undefined) {
window.kthoom = {};
}
// key codes
kthoom.Key = {
ESCAPE: 27,
LEFT: 37,
UP: 38,
RIGHT: 39,
DOWN: 40,
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,
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,
QUESTION_MARK: 191,
LEFT_SQUARE_BRACKET: 219,
RIGHT_SQUARE_BRACKET: 221
};
// The rotation orientation of the comic.
kthoom.rotateTimes = 0;
// global variables
var unarchiver = null;
var currentImage = 0;
var imageFiles = [];
var imageFilenames = [];
var totalImages = 0;
var lastCompletion = 0;
var library = {
allBooks: [],
currentBookNum: 0,
};
var hflip = false, vflip = false, fitMode = kthoom.Key.B;
var canKeyNext = true, canKeyPrev = true;
kthoom.saveSettings = function() {
localStorage.kthoom_settings = JSON.stringify({
rotateTimes: kthoom.rotateTimes,
hflip: hflip,
vflip: vflip,
fitMode: fitMode
});
}
kthoom.loadSettings = function() {
try {
if (localStorage.kthoom_settings.length < 10) return;
var s = JSON.parse(localStorage.kthoom_settings);
kthoom.rotateTimes = s.rotateTimes;
hflip = s.hflip;
vflip = s.vflip;
fitMode = s.fitMode;
} catch(err) {
}
}
// Stores an image filename and its data: URI.
// TODO: investigate if we really need to store as base64 (leave off ;base64 and just
// non-safe URL characters are encoded as %xx ?)
// This would save 25% on memory since base64-encoded strings are 4/3 the size of the binary
kthoom.ImageFile = function(file) {
this.filename = file.filename;
var fileExtension = file.filename.split('.').pop().toLowerCase();
var mimeType = fileExtension == 'png' ? 'image/png' :
(fileExtension == 'jpg' || fileExtension == 'jpeg') ? 'image/jpeg' :
fileExtension == 'gif' ? 'image/gif' : undefined;
this.dataURI = createURLFromArray(file.fileData, mimeType);
this.data = file;
};
kthoom.initProgressMeter = function() {
var svgns = 'http://www.w3.org/2000/svg';
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var pdiv = $('#progress')[0]; // document.getElementById('progress');
var svg = document.createElementNS(svgns, 'svg');
svg.style.width = '100%';
svg.style.height = '100%';
var defs = document.createElementNS(svgns, 'defs');
var patt = document.createElementNS(svgns, 'pattern');
patt.id = 'progress_pattern';
patt.setAttribute('width', '30');
patt.setAttribute('height', '20');
patt.setAttribute('patternUnits', 'userSpaceOnUse');
var rect = document.createElementNS(svgns, 'rect');
rect.setAttribute('width', '100%');
rect.setAttribute('height', '100%');
rect.setAttribute('fill', '#cc2929');
var poly = document.createElementNS(svgns, 'polygon');
poly.setAttribute('fill', 'yellow');
poly.setAttribute('points', '15,0 30,0 15,20 0,20');
patt.appendChild(rect);
patt.appendChild(poly);
defs.appendChild(patt);
svg.appendChild(defs);
var g = document.createElementNS(svgns, 'g');
var outline = document.createElementNS(svgns, 'rect');
outline.setAttribute('y', '1');
outline.setAttribute('width', '100%');
outline.setAttribute('height', '15');
outline.setAttribute('fill', '#777');
outline.setAttribute('stroke', 'white');
outline.setAttribute('rx', '5');
outline.setAttribute('ry', '5');
g.appendChild(outline);
var title = document.createElementNS(svgns, 'text');
title.id = 'progress_title';
title.appendChild(document.createTextNode('0%'));
title.setAttribute('y', '13');
title.setAttribute('x', '99.5%');
title.setAttribute('fill', 'white');
title.setAttribute('font-size', '12px');
title.setAttribute('text-anchor', 'end');
g.appendChild(title);
var meter = document.createElementNS(svgns, 'rect');
meter.id = 'meter';
meter.setAttribute('width', '0%');
meter.setAttribute('height', '17');
meter.setAttribute('fill', 'url(#progress_pattern)');
meter.setAttribute('rx', '5');
meter.setAttribute('ry', '5');
var meter2 = document.createElementNS(svgns, 'rect');
meter2.id = 'meter2';
meter2.setAttribute('width', '0%');
meter2.setAttribute('height', '17');
meter2.setAttribute('opacity', '0.8');
meter2.setAttribute('fill', '#007fff');
meter2.setAttribute('rx', '5');
meter2.setAttribute('ry', '5');
g.appendChild(meter);
g.appendChild(meter2);
var page = document.createElementNS(svgns, 'text');
page.id = 'page';
page.appendChild(document.createTextNode('0/0'));
page.setAttribute('y', '13');
page.setAttribute('x', '0.5%');
page.setAttribute('fill', 'white');
page.setAttribute('font-size', '12px');
g.appendChild(page);
svg.appendChild(g);
pdiv.appendChild(svg);
svg.onclick = function(e) {
for (var x = pdiv, l = 0; x != document.documentElement; x = x.parentNode) l += x.offsetLeft;
var page = Math.max(1, Math.ceil(((e.clientX - l)/pdiv.offsetWidth) * totalImages)) - 1;
currentImage = page;
updatePage();
};
}
kthoom.setProgressMeter = function(pct, opt_label) {
var pct = (pct*100);
var part = 1/totalImages;
var remain = ((pct - lastCompletion)/100)/part;
var fract = Math.min(1, remain);
var smartpct = ((imageFiles.length/totalImages) + fract * part )* 100;
if (totalImages == 0) smartpct = pct;
// + Math.min((pct - lastCompletion), 100/totalImages * 0.9 + (pct - lastCompletion - 100/totalImages)/2, 100/totalImages);
var oldval = parseFloat(getElem('meter').getAttribute('width'));
if (isNaN(oldval)) oldval = 0;
var weight = 0.5;
smartpct = (weight * smartpct + (1-weight) * oldval);
if (pct == 100) smartpct = 100;
if (!isNaN(smartpct)) {
getElem('meter').setAttribute('width', smartpct + '%');
}
var title = getElem('progress_title');
while (title.firstChild) title.removeChild(title.firstChild);
var labelText = pct.toFixed(2) + '% ' + imageFiles.length + '/' + totalImages + '';
if (opt_label) {
labelText = opt_label + ' ' + labelText;
}
title.appendChild(document.createTextNode(labelText));
// fade it out as it approaches finish
//title.setAttribute('fill-opacity', (pct > 90) ? ((100-pct)*5)/100 : 1);
getElem('meter2').setAttribute('width',
100 * (totalImages == 0 ? 0 : ((currentImage+1)/totalImages)) + '%');
var title = getElem('page');
while (title.firstChild) title.removeChild(title.firstChild);
title.appendChild(document.createTextNode( (currentImage+1) + '/' + totalImages ));
if (pct > 0) {
//getElem('nav').className = '';
getElem('progress').className = '';
}
}
function loadFromArrayBuffer(ab) {
var start = (new Date).getTime();
var h = new Uint8Array(ab, 0, 10);
var pathToBitJS = '../../static/js/';
if (h[0] == 0x52 && h[1] == 0x61 && h[2] == 0x72 && h[3] == 0x21) { //Rar!
unarchiver = new bitjs.archive.Unrarrer(ab, pathToBitJS);
} else if (h[0] == 80 && h[1] == 75) { //PK (Zip)
unarchiver = new bitjs.archive.Unzipper(ab, pathToBitJS);
} else { // Try with tar
unarchiver = new bitjs.archive.Untarrer(ab, pathToBitJS);
}
// Listen for UnarchiveEvents.
if (unarchiver) {
unarchiver.addEventListener(bitjs.archive.UnarchiveEvent.Type.PROGRESS,
function(e) {
var percentage = e.currentBytesUnarchived / e.totalUncompressedBytesInArchive;
totalImages = e.totalFilesInArchive;
kthoom.setProgressMeter(percentage, 'Unzipping');
// display nav
lastCompletion = percentage * 100;
});
unarchiver.addEventListener(bitjs.archive.UnarchiveEvent.Type.EXTRACT,
function(e) {
// convert DecompressedFile into a bunch of ImageFiles
if (e.unarchivedFile) {
var f = e.unarchivedFile;
// add any new pages based on the filename
if (imageFilenames.indexOf(f.filename) == -1) {
imageFilenames.push(f.filename);
imageFiles.push(new kthoom.ImageFile(f));
}
}
// display first page if we haven't yet
if (imageFiles.length == currentImage + 1) {
updatePage();
}
});
unarchiver.addEventListener(bitjs.archive.UnarchiveEvent.Type.FINISH,
function(e) {
var diff = ((new Date).getTime() - start)/1000;
console.log('Unarchiving done in ' + diff + 's');
})
unarchiver.start();
} else {
alert('Some error');
}
}
var createURLFromArray = function(array, mimeType) {
var offset = array.byteOffset, len = array.byteLength;
var bb, url;
var blob;
// TODO: Move all this browser support testing to a common place
// and do it just once.
// Blob constructor, see http://dev.w3.org/2006/webapi/FileAPI/#dfn-Blob.
if (typeof Blob == 'function') {
blob = new Blob([array], {type: mimeType});
} else {
throw 'Browser support for Blobs is missing.'
}
if (blob.slice) {
blob = blob.slice(offset, offset + len, mimeType);
} else {
throw 'Browser support for Blobs is missing.'
}
if ((typeof URL != 'function' && typeof URL != 'object') ||
typeof URL.createObjectURL != 'function') {
throw 'Browser support for Object URLs is missing';
}
return URL.createObjectURL(blob);
}
function updatePage() {
var title = getElem('page');
while (title.firstChild) title.removeChild(title.firstChild);
title.appendChild(document.createTextNode( (currentImage+1) + '/' + totalImages ));
getElem('meter2').setAttribute('width',
100 * (totalImages == 0 ? 0 : ((currentImage+1)/totalImages)) + '%');
if (imageFiles[currentImage]) {
setImage(imageFiles[currentImage].dataURI);
} else {
setImage('loading');
}
}
function setImage(url) {
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var canvas = $("#mainImage")[0];
var x = $("#mainImage")[0].getContext('2d');
$('#mainText').hide();
if (url == 'loading') {
updateScale(true);
canvas.width = innerWidth - 100;
canvas.height = 200;
x.fillStyle = 'red';
x.font = '50px sans-serif';
x.strokeStyle = 'black';
x.fillText('Loading Page #' + (currentImage + 1), 100, 100)
} else {
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if ($('body').css('scrollHeight')/innerHeight > 1) {
$('body').css('overflowY', 'scroll');
}
var img = new Image();
img.onerror = function(e) {
canvas.width = innerWidth - 100;
canvas.height = 300;
updateScale(true);
x.fillStyle = 'orange';
x.font = '50px sans-serif';
x.strokeStyle = 'black';
x.fillText('Page #' + (currentImage+1) + ' (' +
imageFiles[currentImage].filename + ')', 100, 100)
x.fillStyle = 'red';
x.fillText('Is corrupt or not an image', 100, 200);
if (/(html|htm)$/.test(imageFiles[currentImage].filename)) {
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.onload = function() {
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//document.getElementById('mainText').style.display = '';
$("#mainText").css("display", "");
$("#mainText").innerHTML('<iframe style="width:100%;height:700px;border:0" src="data:text/html,'+escape(xhr.responseText)+'"></iframe>');
}
xhr.send(null);
} else if (!/(jpg|jpeg|png|gif)$/.test(imageFiles[currentImage].filename) && imageFiles[currentImage].data.uncompressedSize < 10*1024) {
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.onload = function() {
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$("#mainText").css("display", "");
$("#mainText").innerText(xhr.responseText);
};
xhr.send(null);
}
};
img.onload = function() {
var h = img.height,
w = img.width,
sw = w,
sh = h;
kthoom.rotateTimes = (4 + kthoom.rotateTimes) % 4;
x.save();
if (kthoom.rotateTimes % 2 == 1) { sh = w; sw = h;}
canvas.height = sh;
canvas.width = sw;
x.translate(sw/2, sh/2);
x.rotate(Math.PI/2 * kthoom.rotateTimes);
x.translate(-w/2, -h/2);
if (vflip) {
x.scale(1, -1)
x.translate(0, -h);
}
if (hflip) {
x.scale(-1, 1)
x.translate(-w, 0);
}
canvas.style.display = 'none';
scrollTo(0,0);
x.drawImage(img, 0, 0);
updateScale();
canvas.style.display = '';
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$("body").css("overflowY", "");
x.restore();
};
img.src = url;
};
}
function showPrevPage() {
currentImage--;
if (currentImage < 0) {
if (library.allBooks.length == 1) {
currentImage = imageFiles.length - 1;
} else if (library.currentBookNum > 0) {
loadPrevBook();
} else {
// Freeze on the current page.
currentImage++;
return;
}
}
updatePage();
}
function showNextPage() {
currentImage++;
if (currentImage >= Math.max(totalImages, imageFiles.length)) {
if (library.allBooks.length == 1) {
currentImage = 0;
} else if (library.currentBookNum < library.allBooks.length - 1) {
loadNextBook();
} else {
// Freeze on the current page.
currentImage--;
return;
}
}
updatePage();
}
function updateScale(clear) {
var mainImageStyle = getElem('mainImage').style;
mainImageStyle.width = '';
mainImageStyle.height = '';
mainImageStyle.maxWidth = '';
mainImageStyle.maxHeight = '';
var maxheight = innerHeight - 15;
if (!/main/.test(getElem('titlebar').className)) {
maxheight -= 25;
}
if (clear || fitMode == kthoom.Key.N) {
} else if (fitMode == kthoom.Key.B) {
mainImageStyle.maxWidth = '100%';
mainImageStyle.maxHeight = maxheight + 'px';
} else if (fitMode == kthoom.Key.H) {
mainImageStyle.height = maxheight + 'px';
} else if (fitMode == kthoom.Key.W) {
mainImageStyle.width = '100%';
}
kthoom.saveSettings();
}
function keyHandler(evt) {
var code = evt.keyCode;
if (getComputedStyle(getElem('progress')).display == 'none') return;
canKeyNext = ((document.body.offsetWidth+document.body.scrollLeft)/ document.body.scrollWidth) >= 1;
canKeyPrev = (scrollX <= 0);
if (evt.ctrlKey || evt.shiftKey || evt.metaKey) return;
switch(code) {
case kthoom.Key.LEFT:
if (canKeyPrev) showPrevPage();
break;
case kthoom.Key.RIGHT:
if (canKeyNext) showNextPage();
break;
case kthoom.Key.L:
kthoom.rotateTimes--;
if (kthoom.rotateTimes < 0) {
kthoom.rotateTimes = 3;
}
updatePage();
break;
case kthoom.Key.R:
kthoom.rotateTimes++;
if (kthoom.rotateTimes > 3) {
kthoom.rotateTimes = 0;
}
updatePage();
break;
case kthoom.Key.F:
if (!hflip && !vflip) {
hflip = true;
} else if(hflip == true) {
vflip = true;
hflip = false;
} else if(vflip == true) {
vflip = false;
}
updatePage();
break;
case kthoom.Key.W:
fitMode = kthoom.Key.W;
updateScale();
break;
case kthoom.Key.H:
fitMode = kthoom.Key.H;
updateScale();
break;
case kthoom.Key.B:
fitMode = kthoom.Key.B;
updateScale();
break;
case kthoom.Key.N:
fitMode = kthoom.Key.N;
updateScale();
break;
default:
//console.log('KeyCode = ' + code);
break;
}
}
function init(filename) {
if (!window.FileReader) {
alert('Sorry, kthoom will not work with your browser because it does not support the File API. Please try kthoom with Chrome 12+ or Firefox 7+');
} else {
var request = new XMLHttpRequest();
request.open("GET",filename);
request.responseType="arraybuffer";
request.setRequestHeader("X-Test","test1");
request.setRequestHeader("X-Test","test2");
request.addEventListener('load', function(event) {
if (request.status >= 200 && request.status < 300) {
loadFromArrayBuffer(request.response);
} else {
console.warn(request.statusText, request.responseText);
}
});
request.send();
kthoom.initProgressMeter();
document.body.className += /AppleWebKit/.test(navigator.userAgent) ? ' webkit' : '';
//kthoom.resetFileUploader();
kthoom.loadSettings();
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$(document).keydown(keyHandler);
$(window).resize(function() {
var f = (screen.width - innerWidth < 4 && screen.height - innerHeight < 4);
getElem('titlebar').className = f ? 'main' : '';
updateScale();
});
$('#mainImage').click(function(evt) {
// Firefox does not support offsetX/Y so we have to manually calculate
// where the user clicked in the image.
var mainContentWidth = getElem('mainContent').clientWidth;
var mainContentHeight = getElem('mainContent').clientHeight;
var comicWidth = evt.target.clientWidth;
var comicHeight = evt.target.clientHeight;
var offsetX = (mainContentWidth - comicWidth) / 2;
var offsetY = (mainContentHeight - comicHeight) / 2;
var clickX = !!evt.offsetX ? evt.offsetX : (evt.clientX - offsetX);
var clickY = !!evt.offsetY ? evt.offsetY : (evt.clientY - offsetY);
// Determine if the user clicked/tapped the left side or the
// right side of the page.
var clickedPrev = false;
switch (kthoom.rotateTimes) {
case 0:
clickedPrev = clickX < (comicWidth / 2);
break;
case 1:
clickedPrev = clickY < (comicHeight / 2);
break;
case 2:
clickedPrev = clickX > (comicWidth / 2);
break;
case 3:
clickedPrev = clickY > (comicHeight / 2);
break;
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}
if (clickedPrev) {
showPrevPage();
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} else {
showNextPage();
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}
});
}
}