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Add download button.js
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Add download button.js
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Array.prototype.indexOf = function (variable) {
for (i = 0; i < this.length; i++) {
if (this[i] == variable) return i;
}
return -1;
}
Array.prototype.contains = function (variable) {
if (this.indexOf(variable) == -1) {
return false;
} else {
return true;
}
}
// sort based on order of formatDescriptions
function formatSorterFlash (a, b) {
return formatDescriptions[a[0]][0] - formatDescriptions[b[0]][0];
}
function formatSorterHTMLFive (a, b) {
return formatDescriptions[a[3]][0] - formatDescriptions[b[3]][0];
}
// get the HTML source of the video page for later use
var htmlSource = document.getElementsByTagName("html")[0].innerHTML;
// determine if page is using HTML5 beta
var htmlFive = false;
if (htmlSource.search("html5-player") != -1) htmlFive = true;
// set array of format descriptions
var formatDescriptions = new Array();
formatDescriptions['5'] = [9, "Low quality FLV", "240p"];
formatDescriptions['36'] = [8, "Low quality MP4", "240p"];
formatDescriptions['43'] = [7, "Standard WebM", "360p"];
formatDescriptions['34'] = [6, "Standard FLV", "360p"];
formatDescriptions['18'] = [5, "Standard MP4", "360p"];
formatDescriptions['35'] = [4, "Large FLV", "480p"];
formatDescriptions['45'] = [3, "HD WebM (720p)"];
formatDescriptions['22'] = [2, "HD MP4 (720p)"];
formatDescriptions['37'] = [1, "Full HD MP4 (1080p)"];
// get video title, URL-encode it
var encodedTitle = escape(document.getElementById("eow-title").title);
if (!htmlFive) {
// get the URL map for the formats
formatURLMap = htmlSource.split("fmt_url_map=")[1].split("&")[0];
// fix bug with last format by adding a comma to the end
formatURLMap += ",";
// replace HTML encodings
formatURLMap = unescape(formatURLMap);
formatURLMap = formatURLMap.replace(/%2C/g, ",");
formatURLMap = formatURLMap.replace(/%3A/g, ":");
// split it into pieces
formatURLMapArray = formatURLMap.split("|");
// add format numbers to formats array
var formats = new Array();
var formatNumbers = new Array();
formats.push([formatURLMapArray[0], null]);
for (var i = 1; i < formatURLMapArray.length-1; i++) {
var formatNum = formatURLMapArray[i].substring(formatURLMapArray[i].lastIndexOf(",")+1, formatURLMapArray[i].length);
formats.push([formatNum, null]);
}
// add URLs to formats array
for (var i = 1; i < formatURLMapArray.length; i++) {
formats[i-1][1] = formatURLMapArray[i].substring(0, formatURLMapArray[i].lastIndexOf(","));
formats[i-1][1] += "&title=" + encodedTitle;
formatNumbers[i-1] = formats[i-1][0];
}
// make base download string (see below)
if (formats.length > 1) {
var downloadString = "Downloads: ";
} else {
var downloadString = "Download: ";
}
// sort formats
formats.sort(formatSorterFlash);
// add other formats to array
for (var i = 0; i < formats.length; i++) {
var videoURL = formats[i][1];
if (formats[i][0] in formatDescriptions) {
var formatDescription = formatDescriptions[formats[i][0]][1];
} else {
var formatDescription = "Unknown format";
}
// add specific format specification, if available/needed
if (formatDescriptions[formats[i][0]][2]) {
var hoverTitle = "Download as " + formatDescription + " (" + formatDescriptions[formats[i][0]][2] + ") by Option-clicking";
} else {
var hoverTitle = "Download as " + formatDescription + " by Option-clicking";
}
// add link to downloadsString
downloadString += '<a href="' + videoURL + '" title="' + hoverTitle + '">' + formatDescription + '</a>, ';
}
downloadString = downloadString.substring(0, downloadString.length-2);
// see if Standard MP4 should exist, if so, add link to page
if (formatNumbers.contains("34") && !formatNumbers.contains("18") && document.URL.search("&fmt=18") == -1) {
var extraDownloadsString = 'Standard MP4 format available <a href="' + document.URL + '&fmt=18">here</a>.'
}
// if &fmt=18 is there, show link to remove it
if (document.URL.search("&fmt=18") != -1) {
var extraDownloadsString = 'Higher resolution formats may be available <a href="' + document.URL.substring(0, document.URL.search("&fmt=18")) + document.URL.substring(document.URL.search("&fmt=18") + 7) + '">here</a>.';
}
} else {
// isolate the HTML5 player script and get its source
var scripts = document.getElementsByTagName("script");
var scriptSource = scripts[scripts.length - 4].innerHTML;
// find where format function is, split into parts
var formats = scriptSource.split('videoPlayer.setAvailableFormat("');
// remove first piece, doesn't relate to formats
formats.splice(0, 1);
if (formats.length > 1) {
var downloadString = "Downloads: ";
} else {
var downloadString = "Download: ";
}
// clean up formats
for (var i = 0; i < formats.length; i++) {
formats[i] = formats[i].split('");')[0];
formats[i] = formats[i].split('", "');
}
// sort them
formats.sort(formatSorterHTMLFive);
// add them to the download string
for (var i = 0; i < formats.length; i++) {
var videoURL = formats[i][0] + "&title=" + encodedTitle;
if (formats[i][3] in formatDescriptions) {
var formatDescription = formatDescriptions[formats[i][3]][1];
} else {
var formatDescription = "Unknown format";
}
// add specific format specification, if available/needed
if (formatDescriptions[formats[i][3]][2]) {
var hoverTitle = "Download as " + formatDescription + " (" + formatDescriptions[formats[i][3]][2] + ") by Option-clicking";
} else {
var hoverTitle = "Download as " + formatDescription + " by Option-clicking";
}
downloadString += '<a href="' + videoURL + '" title="' + hoverTitle + '">' + formatDescription + '</a>, ';
}
downloadString = downloadString.substring(0, downloadString.length-2);
}
// defines the displayDownloadLinks() function
var downloadFunction = document.createElement("script");
downloadFunction.type = "application/x-javascript";
downloadFunction.textContent = "function displayDownloadLinks () { "
+ "var divVisibility = document.getElementById('downloadDiv').style.display;"
+ "if (divVisibility == 'none') { "
+ "document.getElementById('downloadDiv').style.display = 'block'; "
+ "document.getElementById('downloadVideoButton').innerHTML = '<span class=\"yt-uix-button-content\">Hide Download Links</span>'; "
+ "} else { "
+ "document.getElementById('downloadDiv').style.display = 'none'; "
+ "document.getElementById('downloadVideoButton').innerHTML = '<span class=\"yt-uix-button-content\">Download Video</span>'; "
+ "} "
+ "}";
document.getElementsByTagName("head")[0].appendChild(downloadFunction);
// create the Download button
var downloadButton = document.createElement("button");
downloadButton.type = "button";
downloadButton.setAttribute("class", "yt-uix-button");
downloadButton.setAttribute("onclick", "displayDownloadLinks()");
downloadButton.id = "downloadVideoButton";
downloadButton.innerHTML = '<span class="yt-uix-button-content">Download Video</span>';
document.getElementById("watch-headline-user-info").appendChild(downloadButton);
// adds the links and some instructions to a DIV, adds the DIV to the YouTube page
var downloadDiv = document.createElement("div");
downloadDiv.id = "downloadDiv";
var finalDownloadString = "<p><strong>" + downloadString + "</strong></p>\n";
if (extraDownloadsString) finalDownloadString += "<p><em>" + extraDownloadsString + "</em></p>\n";
finalDownloadString += "<p>Option-click on a link to download the video in that format.</p>";
downloadDiv.innerHTML = finalDownloadString;
downloadDiv.style.marginBottom = "4px";
// if it's Vevo, give it a white background so it's more visible
if (htmlSource.search("vevo") != -1) {
downloadDiv.style.backgroundColor = "#FFFFFF";
downloadDiv.style.marginBottom = "8px";
downloadDiv.style.padding = "4px";
}
downloadDiv.style.display = "none";
document.getElementById("watch-headline").insertBefore(downloadDiv, document.getElementById("watch-headline-user-info"));