comparison interfaces/mushra.js @ 0:d2eb0e6ccaaf

initial commit

+/**
+ *  mushra.js
+ *  Create the MUSHRA interface
+ */
+
+// Once this is loaded and parsed, begin execution
+loadInterface();
+
+function loadInterface() {
+	// Get the dimensions of the screen available to the page
+	var width = window.innerWidth;
+	var height = window.innerHeight;
+	
+	// The injection point into the HTML page
+	interfaceContext.insertPoint = document.getElementById("topLevelBody");
+	var testContent = document.createElement('div');
+	testContent.id = 'testContent';
+	
+	// Create the top div for the Title element
+	var titleAttr = specification.title;
+	var title = document.createElement('div');
+	title.className = "title";
+	title.align = "center";
+	var titleSpan = document.createElement('span');
+	
+	// Set title to that defined in XML, else set to default
+	if (titleAttr != undefined) {
+		titleSpan.textContent = titleAttr;
+	} else {
+		titleSpan.textContent =  'Listening test';
+	}
+	// Insert the titleSpan element into the title div element.
+	title.appendChild(titleSpan);
+	
+	var pagetitle = document.createElement('div');
+	pagetitle.className = "pageTitle";
+	pagetitle.align = "center";
+	var titleSpan = document.createElement('span');
+	titleSpan.id = "pageTitle";
+	pagetitle.appendChild(titleSpan);
+	
+	// Create Interface buttons!
+	var interfaceButtons = document.createElement('div');
+	interfaceButtons.id = 'interface-buttons';
+	interfaceButtons.style.height = '25px';
+	
+	// Create playback start/stop points
+	var playback = document.createElement("button");
+	playback.innerHTML = 'Stop';
+	playback.id = 'playback-button';
+	playback.style.float = 'left';
+	// onclick function. Check if it is playing or not, call the correct function in the
+	// audioEngine, change the button text to reflect the next state.
+	playback.onclick = function() {
+		if (audioEngineContext.status == 1) {
+			audioEngineContext.stop();
+			this.innerHTML = 'Stop';
+            var time = audioEngineContext.timer.getTestTime();
+            console.log('Stopped at ' + time); // DEBUG/SAFETY
+		}
+	};
+	// Create Submit (save) button
+	var submit = document.createElement("button");
+	submit.innerHTML = 'Next';
+	submit.onclick = buttonSubmitClick;
+	submit.id = 'submit-button';
+	submit.style.float = 'left';
+	// Append the interface buttons into the interfaceButtons object.
+	interfaceButtons.appendChild(playback);
+	interfaceButtons.appendChild(submit);
+	
+	// Create a slider box
+	var sliderBox = document.createElement('div');
+	sliderBox.style.width = "100%";
+	sliderBox.style.height = window.innerHeight - 200+12 + 'px';
+	sliderBox.style.marginBottom = '10px';
+	sliderBox.id = 'slider';
+	var scaleHolder = document.createElement('div');
+	scaleHolder.id = "scale-holder";
+	sliderBox.appendChild(scaleHolder);
+	var scaleText = document.createElement('div');
+	scaleText.id = "scale-text-holder";
+	scaleHolder.appendChild(scaleText);
+	var scaleCanvas = document.createElement('canvas');
+	scaleCanvas.id = "scale-canvas";
+	scaleHolder.appendChild(scaleCanvas);
+	var sliderObjectHolder = document.createElement('div');
+	sliderObjectHolder.id = 'slider-holder';
+	sliderObjectHolder.align = "center";
+	sliderBox.appendChild(sliderObjectHolder);
+	
+	// Global parent for the comment boxes on the page
+	var feedbackHolder = document.createElement('div');
+	feedbackHolder.id = 'feedbackHolder';
+	
+	testContent.style.zIndex = 1;
+	interfaceContext.insertPoint.innerHTML = null; // Clear the current schema
+	
+	// Inject into HTML
+	testContent.appendChild(title); // Insert the title
+	testContent.appendChild(pagetitle);
+	testContent.appendChild(interfaceButtons);
+	testContent.appendChild(sliderBox);
+	testContent.appendChild(feedbackHolder);
+	interfaceContext.insertPoint.appendChild(testContent);
+
+	// Load the full interface
+	testState.initialise();
+	testState.advanceState();
+}
+
+function loadTest(audioHolderObject)
+{
+	var id = audioHolderObject.id;
+	
+	var feedbackHolder = document.getElementById('feedbackHolder');
+    feedbackHolder.innerHTML = null;
+	var interfaceObj = audioHolderObject.interfaces;
+	if (interfaceObj.length > 1)
+	{
+		console.log("WARNING - This interface only supports one <interface> node per page. Using first interface node");
+	}
+	interfaceObj = interfaceObj[0];
+	if(interfaceObj.title != null)
+	{
+		document.getElementById("pageTitle").textContent = interfaceObj.title;
+	}
+    var interfaceOptions = specification.interfaces.options.concat(interfaceObj.options);
+    for (var option of interfaceOptions)
+    {
+        if (option.type == "show")
+        {
+            switch(option.name) {
+                case "playhead":
+                    var playbackHolder = document.getElementById('playback-holder');
+                    if (playbackHolder == null)
+                    {
+                        playbackHolder = document.createElement('div');
+                        playbackHolder.style.width = "100%";
+                        playbackHolder.align = 'center';
+                        playbackHolder.appendChild(interfaceContext.playhead.object);
+                        feedbackHolder.appendChild(playbackHolder);
+                    }
+                    break;
+                case "page-count":
+                    var pagecountHolder = document.getElementById('page-count');
+                    if (pagecountHolder == null)
+                    {
+                        pagecountHolder = document.createElement('div');
+                        pagecountHolder.id = 'page-count';
+                    }
+                    pagecountHolder.innerHTML = '<span>Page '+(testState.stateIndex+1)+' of '+testState.stateMap.length+'</span>';
+                    var inject = document.getElementById('interface-buttons');
+                    inject.appendChild(pagecountHolder);
+                    break;
+                case "volume":
+                    if (document.getElementById('master-volume-holder') == null)
+                    {
+                        feedbackHolder.appendChild(interfaceContext.volume.object);
+                    }
+                    break;
+            }
+        }
+    }
+	
+	// Delete outside reference
+	var outsideReferenceHolder = document.getElementById('outside-reference');
+	if (outsideReferenceHolder != null) {
+		document.getElementById('interface-buttons').removeChild(outsideReferenceHolder);
+	}
+	
+	var sliderBox = document.getElementById('slider-holder');
+	sliderBox.innerHTML = null;
+	
+	var commentBoxPrefix = "Comment on track";
+	if (interfaceObj.commentBoxPrefix != undefined) {
+		commentBoxPrefix = interfaceObj.commentBoxPrefix;
+	}
+	var loopPlayback = audioHolderObject.loop;
+	
+	currentTestHolder = document.createElement('audioHolder');
+	currentTestHolder.id = audioHolderObject.id;
+	currentTestHolder.repeatCount = audioHolderObject.repeatCount;
+	
+	// Find all the audioElements from the audioHolder
+	var index = 0;
+	$(audioHolderObject.audioElements).each(function(index,element){
+		// Find URL of track
+		// In this jQuery loop, variable 'this' holds the current audioElement.
+		
+		var audioObject = audioEngineContext.newTrack(element);
+		if (element.type == 'outside-reference')
+		{
+			// Construct outside reference;
+			var orNode = new outsideReferenceDOM(audioObject,index,document.getElementById('interface-buttons'));
+			audioObject.bindInterface(orNode);
+		} else {
+			// Create a slider per track
+            switch(audioObject.specification.parent.label) {
+                case "none":
+                    label = "";
+                    break;
+                case "letter":
+                    label = String.fromCharCode(97 + index);
+                    break;
+                case "capital":
+                    label = String.fromCharCode(65 + index);
+                    break;
+                default:
+                    label = ""+index;
+                    break;
+            }
+			var sliderObj = new sliderObject(audioObject,label);
+			
+			if (typeof audioHolderObject.initialPosition === "number")
+			{
+				// Set the values
+				sliderObj.slider.value = audioHolderObject.initalPosition;
+			} else {
+				// Distribute it randomnly
+				sliderObj.slider.value = Math.random();
+			}
+			sliderBox.appendChild(sliderObj.holder);
+			audioObject.bindInterface(sliderObj);
+            interfaceContext.commentBoxes.createCommentBox(audioObject);
+			index += 1;
+		}
+        
+	});
+    
+    if (audioHolderObject.showElementComments) {
+		interfaceContext.commentBoxes.showCommentBoxes(feedbackHolder,true);
+	}
+	
+	$(audioHolderObject.commentQuestions).each(function(index,element) {
+		var node = interfaceContext.createCommentQuestion(element);
+		feedbackHolder.appendChild(node.holder);
+	});
+	
+	// Auto-align
+	resizeWindow(null);
+}
+
+function sliderObject(audioObject,label)
+{
+	// Constructs the slider object. We use the HTML5 slider object
+	this.parent = audioObject;
+	this.holder = document.createElement('div');
+	this.title = document.createElement('span');
+	this.slider = document.createElement('input');
+	this.play = document.createElement('button');
+	
+	this.holder.className = 'track-slider';
+	this.holder.style.height = window.innerHeight-200 + 'px';
+	this.holder.appendChild(this.title);
+	this.holder.appendChild(this.slider);
+	this.holder.appendChild(this.play);
+	this.holder.align = "center";
+	if (label == 0)
+	{
+		this.holder.style.marginLeft = '0px';
+	}
+	this.holder.setAttribute('trackIndex',audioObject.id);
+	
+	this.title.textContent = label;
+	this.title.style.width = "100%";
+	this.title.style.float = "left";
+	
+	this.slider.type = "range";
+	this.slider.className = "track-slider-range track-slider-not-moved";
+	this.slider.min = "0";
+	this.slider.max = "1";
+	this.slider.step = "0.01";
+	this.slider.setAttribute('orient','vertical');
+	this.slider.style.height = window.innerHeight-250 + 'px';
+	this.slider.onchange = function()
+	{
+		var time = audioEngineContext.timer.getTestTime();
+		var id = Number(this.parentNode.getAttribute('trackIndex'));
+		audioEngineContext.audioObjects[id].metric.moved(time,this.value);
+		console.log('slider '+id+' moved to '+this.value+' ('+time+')');
+		$(this).removeClass('track-slider-not-moved');
+	};
+	
+	this.play.textContent = "Loading...";
+	this.play.value = audioObject.id;
+	this.play.style.float = "left";
+	this.play.style.width = "100%";
+	this.play.disabled = true;
+    this.play.setAttribute("playstate","ready");
+	this.play.onclick = function(event)
+	{
+		var id = Number(event.currentTarget.value);
+		//audioEngineContext.metric.sliderPlayed(id);
+		if (event.currentTarget.getAttribute("playstate") == "ready")
+        {audioEngineContext.play(id);}
+        else if (event.currentTarget.getAttribute("playstate") == "playing")
+        {audioEngineContext.stop();}
+	};
+	
+	this.enable = function() {
+		this.play.disabled = false;
+		this.play.textContent = "Play";
+		$(this.slider).removeClass('track-slider-disabled');
+	};
+	
+	this.exportXMLDOM = function(audioObject) {
+		// Called by the audioObject holding this element. Must be present
+		var node = storage.document.createElement('value');
+		node.textContent = this.slider.value;
+		return node;
+	};
+    this.startPlayback = function()
+    {
+        // Called when playback has begun
+        this.play.setAttribute("playstate","playing");
+        $(".track-slider").removeClass('track-slider-playing');
+		$(this.holder).addClass('track-slider-playing');
+		var outsideReference = document.getElementById('outside-reference');
+		if (outsideReference != null) {
+			$(outsideReference).removeClass('track-slider-playing');
+		}
+        this.play.textContent = "Stop";
+    };
+    this.stopPlayback = function()
+    {
+        // Called when playback has stopped. This gets called even if playback never started!
+        this.play.setAttribute("playstate","ready");
+        $(this.holder).removeClass('track-slider-playing');
+        this.play.textContent = "Play";
+    };
+	this.getValue = function() {
+		return this.slider.value;
+	};
+	
+	this.resize = function(event)
+	{
+		this.holder.style.height = window.innerHeight-200 + 'px';
+		this.slider.style.height = window.innerHeight-250 + 'px';
+	};
+	this.updateLoading = function(progress)
+	{
+		progress = String(progress);
+		progress = progress.substr(0,5);
+		this.play.textContent = "Loading: "+progress+"%";
+	};
+	
+	if (this.parent.state == 1)
+	{
+		this.enable();
+	}
+	this.getPresentedId = function()
+	{
+		return this.title.textContent;
+	};
+	this.canMove = function()
+	{
+		return true;
+	};
+    this.error = function() {
+            // audioObject has an error!!
+        this.playback.textContent = "Error";
+        $(this.playback).addClass("error-colour");
+    }
+}
+
+function outsideReferenceDOM(audioObject,index,inject)
+{
+	this.parent = audioObject;
+	this.outsideReferenceHolder = document.createElement('button');
+	this.outsideReferenceHolder.id = 'outside-reference';
+	this.outsideReferenceHolder.className = 'outside-reference';
+	this.outsideReferenceHolder.setAttribute('track-id',index);
+	this.outsideReferenceHolder.textContent = "Play Reference";
+	this.outsideReferenceHolder.disabled = true;
+	
+	this.outsideReferenceHolder.onclick = function(event)
+	{
+		audioEngineContext.play(event.currentTarget.getAttribute('track-id'));
+	};
+	inject.appendChild(this.outsideReferenceHolder);
+	this.enable = function()
+	{
+		if (this.parent.state == 1)
+		{
+			this.outsideReferenceHolder.disabled = false;
+		}
+	};
+	this.updateLoading = function(progress)
+	{
+		if (progress != 100)
+		{
+			progress = String(progress);
+			progress = progress.split('.')[0];
+			this.outsideReferenceHolder[0].children[0].textContent = progress+'%';
+		} else {
+			this.outsideReferenceHolder[0].children[0].textContent = "Play Reference";
+		}
+	};
+    this.startPlayback = function()
+    {
+        // Called when playback has begun
+        $('.track-slider').removeClass('track-slider-playing');
+        $('.comment-div').removeClass('comment-box-playing');
+        $(this.outsideReferenceHolder).addClass('track-slider-playing');
+    };
+    this.stopPlayback = function()
+    {
+        // Called when playback has stopped. This gets called even if playback never started!
+        $(this.outsideReferenceHolder).removeClass('track-slider-playing');
+    };
+	this.exportXMLDOM = function(audioObject)
+	{
+		return null;
+	};
+	this.getValue = function()
+	{
+		return 0;
+	};
+	this.getPresentedId = function()
+	{
+		return 'reference';
+	};
+	this.canMove = function()
+	{
+		return false;
+	};
+    this.error = function() {
+            // audioObject has an error!!
+        this.outsideReferenceHolder.textContent = "Error";
+        $(this.outsideReferenceHolder).addClass("error-colour");
+    }
+}
+
+function resizeWindow(event)
+{
+	// Function called when the window has been resized.
+	// MANDATORY FUNCTION
+	
+	var outsideRef = document.getElementById('outside-reference');
+	if(outsideRef != null)
+	{
+		outsideRef.style.left = (window.innerWidth-120)/2 + 'px';
+	}
+	
+	// Auto-align
+	var numObj = document.getElementsByClassName('track-slider').length;
+	var totalWidth = (numObj-1)*150+100;
+	var diff = (window.innerWidth - totalWidth)/2;
+	document.getElementById('slider').style.height = window.innerHeight - 180 + 'px';
+	if (diff <= 0){diff = 0;}
+	document.getElementById('slider-holder').style.marginLeft = diff + 'px';
+	for (var i in audioEngineContext.audioObjects)
+	{
+		if (audioEngineContext.audioObjects[i].specification.type != 'outside-reference'){
+			audioEngineContext.audioObjects[i].interfaceDOM.resize(event);
+		}
+	}
+	document.getElementById('scale-holder').style.marginLeft = (diff-100) + 'px';
+	document.getElementById('scale-text-holder').style.height = window.innerHeight-194 + 'px';
+	var canvas = document.getElementById('scale-canvas');
+	canvas.width = totalWidth;
+	canvas.height = window.innerHeight-194;
+	drawScale();
+}
+
+function drawScale()
+{
+	var interfaceObj = testState.currentStateMap.interfaces[0];
+	var scales = testState.currentStateMap.interfaces[0].scales;
+	scales = scales.sort(function(a,b) {
+		return a.position - b.position;
+	});
+	var canvas = document.getElementById('scale-canvas');
+	var ctx = canvas.getContext("2d");
+	var height = canvas.height;
+	var width = canvas.width;
+	var draw_heights = [24, height-34];
+	var textHolder = document.getElementById('scale-text-holder');
+	textHolder.innerHTML = null;
+	var lastHeight = 0;
+	for (var scale of scales)
+	{
+		var posPercent = scale.position / 100.0;
+		var posPix = (1-posPercent)*(draw_heights[1]-draw_heights[0])+draw_heights[0];
+		ctx.fillStyle = "#000000";
+		ctx.setLineDash([1,2]);
+		ctx.moveTo(0,posPix);
+		ctx.lineTo(width,posPix);
+		ctx.stroke();
+		var text = document.createElement('div');
+		text.align = "right";
+		var textC = document.createElement('span');
+		textC.textContent = scale.text;
+		text.appendChild(textC);
+		text.className = "scale-text";
+		textHolder.appendChild(text);
+		text.style.top = (posPix-9) + 'px';
+		text.style.left = 100 - ($(text).width()+3) + 'px';
+		lastHeight = posPix;
+	}
+}
+
+function buttonSubmitClick() // TODO: Only when all songs have been played!
+{
+	var checks = [];
+	checks = checks.concat(testState.currentStateMap.interfaces[0].options);
+	checks = checks.concat(specification.interfaces.options);
+	var canContinue = true;
+	
+	// Check that the anchor and reference objects are correctly placed
+	if (interfaceContext.checkHiddenAnchor() == false) {return;}
+	if (interfaceContext.checkHiddenReference() == false) {return;}
+	
+	for (var i=0; i<checks.length; i++) {
+		if (checks[i].type == 'check')
+		{
+			switch(checks[i].name) {
+			case 'fragmentPlayed':
+				// Check if all fragments have been played
+				var checkState = interfaceContext.checkAllPlayed();
+				if (checkState == false) {canContinue = false;}
+				break;
+			case  'fragmentFullPlayback':
+				// Check all fragments have been played to their full length
+				var checkState = interfaceContext.checkAllPlayed();
+				if (checkState == false) {canContinue = false;}
+				console.log('NOTE: fragmentFullPlayback not currently implemented, performing check fragmentPlayed instead');
+				break;
+			case 'fragmentMoved':
+				// Check all fragment sliders have been moved.
+				var checkState = interfaceContext.checkAllMoved();
+				if (checkState == false) {canContinue = false;}
+				break;
+			case 'fragmentComments':
+				// Check all fragment sliders have been moved.
+				var checkState = interfaceContext.checkAllCommented();
+				if (checkState == false) {canContinue = false;}
+				break;
+			//case 'scalerange':
+				// Check the scale is used to its full width outlined by the node
+				//var checkState = interfaceContext.checkScaleRange();
+				//if (checkState == false) {canContinue = false;}
+			//	break;
+			default:
+				console.log("WARNING - Check option "+checks[i].check+" is not supported on this interface");
+				break;
+			}
+
+		}
+		if (!canContinue) {break;}
+	}
+	
+    if (canContinue) {
+	    if (audioEngineContext.status == 1) {
+	        var playback = document.getElementById('playback-button');
+	        playback.click();
+	    // This function is called when the submit button is clicked. Will check for any further tests to perform, or any post-test options
+	    } else
+	    {
+	        if (audioEngineContext.timer.testStarted == false)
+	        {
+	            alert('You have not started the test! Please press start to begin the test!');
+	            return;
+	        }
+	    }
+	    testState.advanceState();
+    } 
+}
+
+function pageXMLSave(store, pageSpecification)
+{
+	// MANDATORY
+	// Saves a specific test page
+	// You can use this space to add any extra nodes to your XML <audioHolder> saves
+	// Get the current <page> information in store (remember to appendChild your data to it)
+	// pageSpecification is the current page node configuration
+	// To create new XML nodes, use storage.document.createElement();
+}