view interfaces/AB.js @ 2376:c41caaa96633

Some fixes for #90. Also a failsafe loop if the server never responds with meaningul information from saves (for instance, running only on apache or basic http servers). More changes to pythonServer for python 3.5. Please check if still valid on 2.7

// 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;
	interfaceContext.insertPoint.innerHTML = null; // Clear the current schema
	
	// Custom comparator Object
	Interface.prototype.comparator = null;
    
    Interface.prototype.checkScaleRange = function(min, max) {
        var page = testState.getCurrentTestPage();
        var audioObjects = audioEngineContext.audioObjects;
        var state = true;
        var str = "Please keep listening. ";
        var minRanking = Infinity;
        var maxRanking = -Infinity;
        for (var ao of audioObjects) {
            var rank = ao.interfaceDOM.getValue();
            if (rank < minRanking) {minRanking = rank;}
            if (rank > maxRanking) {maxRanking = rank;}
        }
        if (maxRanking*100 < max) {
            str += "At least one fragment must be selected."
            state = false;
        }
        if (!state) {
            console.log(str);
            this.storeErrorNode(str);
            interfaceContext.lightbox.post("Message",str);
        }
        return state;
    }
	
	// 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
		}
	};
	// Append the interface buttons into the interfaceButtons object.
	interfaceButtons.appendChild(playback);
	
	// Global parent for the comment boxes on the page
	var feedbackHolder = document.createElement('div');
	feedbackHolder.id = 'feedbackHolder';
	
	// Construct the AB Boxes
	var boxes = document.createElement('div');
	boxes.align = "center";
	boxes.id = "box-holders";
    boxes.style.float = "left";
	
	var submit = document.createElement('button');
	submit.id = "submit";
	submit.onclick = buttonSubmitClick;
	submit.className = "big-button";
	submit.textContent = "submit";
	submit.style.position = "relative";
	submit.style.left = (window.innerWidth-250)/2 + 'px';
		
	feedbackHolder.appendChild(boxes);
	
	// Inject into HTML
	testContent.appendChild(title); // Insert the title
	testContent.appendChild(pagetitle);
	testContent.appendChild(interfaceButtons);
	testContent.appendChild(feedbackHolder);
	testContent.appendChild(submit);
	interfaceContext.insertPoint.appendChild(testContent);

	// Load the full interface
	testState.initialise();
	testState.advanceState();
}

function loadTest(audioHolderObject)
{
	var feedbackHolder = document.getElementById('feedbackHolder');
	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.style.float = "left";
                        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;
            }
        }
    }
	
	// Populate the comparator object
	interfaceContext.comparator = new comparator(audioHolderObject);
    if (audioHolderObject.showElementComments)
    {
        var commentHolder = document.createElement('div');
        commentHolder.id = 'commentHolder';
        document.getElementById('testContent').appendChild(commentHolder);
        // Generate one comment box per presented page
        for (var element of audioEngineContext.audioObjects)
        {
            interfaceContext.commentBoxes.createCommentBox(element);
        }
        interfaceContext.commentBoxes.showCommentBoxes(commentHolder,true);
    }
	resizeWindow(null);
    
    $(audioHolderObject.commentQuestions).each(function(index,element) {
		var node = interfaceContext.createCommentQuestion(element);
		commentHolder.appendChild(node.holder);
	});
}

function comparator(audioHolderObject)
{	
	this.comparatorBox = function(audioElement,id,text)
	{
		this.parent = audioElement;
		this.id = id;
		this.value = 0;
		this.disabled = true;
		this.box = document.createElement('div');
		this.box.className = 'comparator-holder';
		this.box.setAttribute('track-id',audioElement.id);
		this.box.id = 'comparator-'+text;
		this.selector = document.createElement('div');
		this.selector.className = 'comparator-selector disabled';
		var selectorText = document.createElement('span');
		selectorText.textContent = text;
		this.selector.appendChild(selectorText);
		this.playback = document.createElement('button');
		this.playback.className = 'comparator-button';
		this.playback.disabled = true;
		this.playback.textContent = "Listen";
		this.box.appendChild(this.selector);
		this.box.appendChild(this.playback);
		this.selector.onclick = function(event)
		{
			var time = audioEngineContext.timer.getTestTime();
			if ($(event.currentTarget).hasClass('disabled'))
			{
				console.log("Please wait until sample has loaded");
				return;
			}
			if (audioEngineContext.status == 0)
			{
				interfaceContext.lightbox.post("Message","Please listen to the samples before making a selection");
				console.log("Please listen to the samples before making a selection");
				return;
            }
			var id = event.currentTarget.parentElement.getAttribute('track-id');
			interfaceContext.comparator.selected = id;
            if ($(event.currentTarget).hasClass("selected")) {
                $(".comparator-selector").removeClass('selected');
                for (var i=0; i<interfaceContext.comparator.comparators.length; i++)
                {
                    var obj = interfaceContext.comparator.comparators[i];
                    obj.parent.metric.moved(time,0);
                    obj.value = 0;
                }
            } else {
                $(".comparator-selector").removeClass('selected');
                $(event.currentTarget).addClass('selected');
                for (var i=0; i<interfaceContext.comparator.comparators.length; i++)
                {
                    var obj = interfaceContext.comparator.comparators[i];
                    if (i == id) {
                        obj.value = 1;
                    } else {
                        obj.value = 0;
                    }
                    obj.parent.metric.moved(time,obj.value);
                }
                console.log("Selected "+id+' ('+time+')');
            }
		};
        this.playback.setAttribute("playstate","ready");
		this.playback.onclick = function(event)
		{
			var id = event.currentTarget.parentElement.getAttribute('track-id');
            if (event.currentTarget.getAttribute("playstate") == "ready")
            {
                audioEngineContext.play(id);
            } else if (event.currentTarget.getAttribute("playstate") == "playing") {
                audioEngineContext.stop();
            }
			
		};
		
		this.enable = function()
		{
			if (this.parent.state == 1)
			{
				$(this.selector).removeClass('disabled');
				this.playback.disabled = false;
			}
		};
		this.updateLoading = function(progress)
		{
			if (progress != 100)
			{
				progress = String(progress);
				progress = progress.split('.')[0];
				this.playback.textContent = progress+'%';
			} else {
				this.playback.textContent = "Play";
			}
		};
        this.error = function() {
            // audioObject has an error!!
            this.playback.textContent = "Error";
            $(this.playback).addClass("error-colour");
        }
        this.startPlayback = function()
        {
            $('.comparator-button').text('Listen');
            $(this.playback).text('Stop');
            this.playback.setAttribute("playstate","playing");
        };
        this.stopPlayback = function()
        {
            $(this.playback).text('Listen');
            this.playback.setAttribute("playstate","ready");
        };
		this.exportXMLDOM = function(audioObject)
		{
			var node = storage.document.createElement('value');
			node.textContent = this.value;
			return node;
		};
		this.getValue = function() {
			return this.value;	
		};
		this.getPresentedId = function()
		{
			return this.selector.children[0].textContent;
		};
		this.canMove = function()
		{
			return false;
		};
	};
	
	this.boxHolders = document.getElementById('box-holders');
	this.boxHolders.innerHTML = null;
	this.comparators = [];
	this.selected = null;
	
	// First generate the Audio Objects for the Audio Engine
	for (var index=0; index<audioHolderObject.audioElements.length; index++)
	{
		var element = audioHolderObject.audioElements[index];
        var audioObject = audioEngineContext.newTrack(element);
		if (index == audioHolderObject.outsideReference || element.type == 'outside-reference')
		{
            var orNode = new interfaceContext.outsideReferenceDOM(audioObject,index,document.getElementById('interface-buttons'));
			audioObject.bindInterface(orNode);
        } else {
            var label;
            switch(audioObject.specification.parent.label) {
                case "none":
                    label = "";
                    break;
                case "number":
                    label = ""+index;
                    break;
                case "letter":
                    label = String.fromCharCode(97 + index);
                    break;
                default:
                    label = String.fromCharCode(65 + index);
                    break;
            }
            var node = new this.comparatorBox(audioObject,index,label);
            audioObject.bindInterface(node);
            this.comparators.push(node);
            this.boxHolders.appendChild(node.box);
        }
	}
	return this;
}

function resizeWindow(event)
{
	document.getElementById('submit').style.left = (window.innerWidth-250)/2 + 'px';
	var numObj = interfaceContext.comparator.comparators.length;
	var boxW = numObj*312;
    var diff = window.innerWidth - boxW;
    while (diff < 0)
    {
        numObj = Math.ceil(numObj/2);
        boxW = numObj*312;
        diff = window.innerWidth - boxW;
    }
    document.getElementById('box-holders').style.marginLeft = diff/2 + 'px';
    document.getElementById('box-holders').style.marginRight = diff/2 + 'px';
    document.getElementById('box-holders').style.width = boxW + 'px';
    
    var outsideRef = document.getElementById('outside-reference');
	if(outsideRef != null)
	{
		outsideRef.style.left = (window.innerWidth-120)/2 + 'px';
	}
}

function buttonSubmitClick()
{
	var checks = [];
	checks = checks.concat(testState.currentStateMap.interfaces[0].options);
	checks = checks.concat(specification.interfaces.options);
	var canContinue = true;
	
	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.checkFragmentsFullyPlayed();
				if (checkState == false) {canContinue = false;}
				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 has been used effectively
                var checkState = interfaceContext.checkScaleRange(checks[i].min,checks[i].max);
                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)
	        {
	            interfaceContext.lightbox.post("Warning",'You have not started the test! Please click play on a sample 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();
}