305 lines
10 KiB
JavaScript
305 lines
10 KiB
JavaScript
var whiteboardId = getQueryVariable("whiteboardid");
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whiteboardId = whiteboardId || "myNewWhiteboard";
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var myUsername = getQueryVariable("username");
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var accessToken = getQueryVariable("accesstoken");
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myUsername = myUsername || "unknown" + (Math.random() + "").substring(2, 6);
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accessToken = accessToken || "";
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var url = document.URL.substr(0, document.URL.lastIndexOf('/'));
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var signaling_socket = null;
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var urlSplit = url.split("/");
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var subdir = "";
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for (var i = 3; i < urlSplit.length; i++) {
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subdir = subdir + '/' + urlSplit[i];
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}
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if (subdir != "") {
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signaling_socket = io("", { "path": subdir + "/socket.io" }); //Connect even if we are in a subdir behind a reverse proxy
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} else {
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signaling_socket = io();
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}
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signaling_socket.on('connect', function () {
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console.log("Websocket connected!");
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signaling_socket.on('drawToWhiteboard', function (content) {
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whiteboard.handleEventsAndData(content, true);
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});
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signaling_socket.on('refreshUserBadges', function () {
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whiteboard.refreshUserBadges();
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});
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signaling_socket.on('wrongAccessToken', function () {
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alert("Access denied! Wrong accessToken!")
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});
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signaling_socket.emit('joinWhiteboard', { wid : whiteboardId, at : accessToken });
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});
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$(document).ready(function () {
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whiteboard.loadWhiteboard("#whiteboardContainer", { //Load the whiteboard
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whiteboardId: whiteboardId,
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username: myUsername,
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sendFunction: function (content) {
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content["at"] = accessToken;
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signaling_socket.emit('drawToWhiteboard', content);
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}
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});
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// request whiteboard from server
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$.get(subdir + "/loadwhiteboard", { wid: whiteboardId, at : accessToken }).done(function (data) {
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whiteboard.loadData(data)
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});
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/*----------------/
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Whiteboard actions
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/----------------*/
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// whiteboard clear button
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$("#whiteboardTrashBtn").click(function () {
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whiteboard.clearWhiteboard();
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});
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// undo button
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$("#whiteboardUndoBtn").click(function () {
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whiteboard.undoWhiteboardClick();
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});
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// switch tool
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$(".whiteboardTool").click(function () {
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$(".whiteboardTool").removeClass("active");
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$(this).addClass("active");
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var activeTool = $(this).attr("tool");
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whiteboard.setTool(activeTool);
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if(activeTool == "mouse" || activeTool == "recSelect") {
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$(".activeToolIcon").empty();
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} else {
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$(".activeToolIcon").html($(this).html()); //Set Active icon the same as the button icon
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}
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});
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// upload image button
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$("#addImgToCanvasBtn").click(function () {
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alert("Please drag the image into the browser.");
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});
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// save image to png
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$("#saveAsImageBtn").click(function () {
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var imgData = whiteboard.getImageDataBase64();
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var a = document.createElement('a');
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a.href = imgData;
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a.download = 'whiteboard.png';
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document.body.appendChild(a);
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a.click();
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document.body.removeChild(a);
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});
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// save image to json containing steps
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$("#saveAsJSONBtn").click(function () {
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var imgData = whiteboard.getImageDataJson();
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var a = window.document.createElement('a');
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a.href = window.URL.createObjectURL(new Blob([imgData], { type: 'text/json' }));
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a.download = 'whiteboard.json';
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// Append anchor to body.
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document.body.appendChild(a);
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a.click();
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// Remove anchor from body
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document.body.removeChild(a);
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});
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// upload json containing steps
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$("#uploadJsonBtn").click(function () {
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$("#myFile").click();
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});
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// load json to whiteboard
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$("#myFile").on("change", function () {
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var file = document.getElementById("myFile").files[0];
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var reader = new FileReader();
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reader.onload = function (e) {
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try {
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var j = JSON.parse(e.target.result);
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whiteboard.loadJsonData(j);
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} catch (e) {
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alert("File was not a valid JSON!");
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}
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};
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reader.readAsText(file);
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$(this).val("");
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});
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// On thickness slider change
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$("#whiteboardThicknessSlider").on("change", function () {
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whiteboard.thickness = $(this).val();
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});
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// handle drag&drop
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var dragCounter = 0;
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$('#whiteboardContainer').on("dragenter", function (e) {
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e.preventDefault();
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e.stopPropagation();
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dragCounter++;
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whiteboard.dropIndicator.show();
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});
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$('#whiteboardContainer').on("dragleave", function (e) {
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e.preventDefault();
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e.stopPropagation();
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dragCounter--;
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if (dragCounter === 0) {
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whiteboard.dropIndicator.hide();
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}
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});
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$('#whiteboardContainer').on('drop', function (e) { //Handle drop
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if (e.originalEvent.dataTransfer) {
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if (e.originalEvent.dataTransfer.files.length) { //File from harddisc
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e.preventDefault();
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e.stopPropagation();
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var filename = e.originalEvent.dataTransfer.files[0]["name"];
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if (isImageFileName(filename)) {
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var blob = e.originalEvent.dataTransfer.files[0];
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var reader = new window.FileReader();
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reader.readAsDataURL(blob);
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reader.onloadend = function () {
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base64data = reader.result;
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uploadImgAndAddToWhiteboard(base64data);
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}
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} else {
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console.error("File must be an image!");
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}
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} else { //File from other browser
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var fileUrl = e.originalEvent.dataTransfer.getData('URL');
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var imageUrl = e.originalEvent.dataTransfer.getData('text/html');
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var rex = /src="?([^"\s]+)"?\s*/;
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var url = rex.exec(imageUrl);
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if (url && url.length > 1) {
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url = url[1];
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} else {
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url = "";
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}
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isValidImageUrl(fileUrl, function (isImage) {
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if (isImage && isImageFileName(url)) {
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whiteboard.addImgToCanvasByUrl(fileUrl);
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} else {
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isValidImageUrl(url, function (isImage) {
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if (isImage) {
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if (isImageFileName(url)) {
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whiteboard.addImgToCanvasByUrl(url);
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} else {
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uploadImgAndAddToWhiteboard(url);
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}
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} else {
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console.error("Can only upload imagedata!");
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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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dragCounter = 0;
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whiteboard.dropIndicator.hide();
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});
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$('#whiteboardColorpicker').colorPicker({
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renderCallback: function (elm) {
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whiteboard.drawcolor = elm.val();
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}
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});
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});
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//Prevent site from changing tab on drag&drop
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window.addEventListener("dragover", function (e) {
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e = e || event;
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e.preventDefault();
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}, false);
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window.addEventListener("drop", function (e) {
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e = e || event;
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e.preventDefault();
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}, false);
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function uploadImgAndAddToWhiteboard(base64data) {
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var date = (+new Date());
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$.ajax({
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type: 'POST',
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url: document.URL.substr(0, document.URL.lastIndexOf('/')) + '/upload',
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data: {
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'imagedata': base64data,
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'whiteboardId': whiteboardId,
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'date': date,
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'at' : accessToken
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},
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success: function (msg) {
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var filename = whiteboardId + "_" + date + ".png";
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whiteboard.addImgToCanvasByUrl(document.URL.substr(0, document.URL.lastIndexOf('/')) + "/uploads/" + filename); //Add image to canvas
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console.log("Image uploaded!");
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},
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error: function (err) {
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console.error("Failed to upload frame: " + JSON.stringify(err));
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}
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});
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}
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// verify if filename refers to an image
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function isImageFileName(filename) {
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var extension = filename.split(".")[filename.split(".").length - 1];
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var known_extensions = ["png", "jpg", "jpeg", "gif", "tiff"];
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return known_extensions.includes(extension.toLowerCase());
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}
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// verify if given url is url to an image
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function isValidImageUrl(url, callback) {
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var img = new Image();
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var timer = null;
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img.onerror = img.onabort = function () {
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clearTimeout(timer);
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callback(false);
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};
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img.onload = function () {
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clearTimeout(timer);
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callback(true);
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};
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timer = setTimeout(function () {
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callback(false);
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}, 2000);
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img.src = url;
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}
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// handle pasting from clipboard
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window.addEventListener("paste", function (e) {
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if (e.clipboardData) {
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var items = e.clipboardData.items;
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if (items) {
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// Loop through all items, looking for any kind of image
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for (var i = 0; i < items.length; i++) {
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if (items[i].type.indexOf("image") !== -1) {
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// We need to represent the image as a file,
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var blob = items[i].getAsFile();
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var reader = new window.FileReader();
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reader.readAsDataURL(blob);
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reader.onloadend = function () {
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console.log("Uploading image!");
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base64data = reader.result;
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uploadImgAndAddToWhiteboard(base64data);
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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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// get 'GET' parameter by variable name
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function getQueryVariable(variable) {
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var query = window.location.search.substring(1);
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var vars = query.split("&");
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for (var i = 0; i < vars.length; i++) {
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var pair = vars[i].split("=");
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if (pair[0] == variable) {
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return pair[1];
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}
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}
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return false;
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} |