bananu7 · August 29, 2015 14:00
diff --git a/jsPlumb_poc.html b/jsPlumb_poc.html
 <!doctype html>
 <html>
 
 <head>
    <title>Blocks Proof of Concept</title>
    <style type="text/css">
        div.block {
            background-color: #36C;
            min-width: 200px;
            height: 100px;
            float: left;
            padding: 10px;
            
            text-align: center;
            vertical-align: middle;
            font-size: 3em;
            
            position:absolute;
        }
    </style>
 </head>
 
 <body>

 <pre id="output"></pre>
 <div id="content"></div>

 <script src="jquery-2.1.0.js" type="text/javascript"></script>
 <script src="jquery-ui-1.10.4.min.js" type="text/javascript"></script>
 <script src="jquery.jsPlumb-1.5.5-min.js" type="text/javascript"></script>

 <!--script src="underscore-min.js" type="text/javascript"></script-->
 <!--script src="traceur/traceur.js" type="text/javascript"></script>
 <script src="traceur/bootstrap.js" type="text/javascript"></script-->
 <!--
 <script src="https://traceur-compiler.googlecode.com/git/bin/traceur.js" 
    type="text/javascript"></script>
 <script src="https://traceur-compiler.googlecode.com/git/src/bootstrap.js"
    type="text/javascript"></script>
    
 -->
 <!--script>
  //traceur.options.experimental = true;
 </script-->
 
 <script>

 var exampleDropOptions = {
            tolerance:"touch",
            hoverClass:"dropHover",
            activeClass:"dragActive",
            
            connector: ["Bezier", { curviness:1 } ],
            maxConnections:3,
            endpoint:["Dot", { radius:11 }],
        };
        
 function getEndpointColorFromType(type) {
    switch (type) {
    case "int" : return "#3399FF";
    case "string" : return "#FF9933";
    default: return "#999999";
    }
 }

 function createTypeEndpoint(type, isInput) {
    var color = getEndpointColorFromType(type);

    return {
        paintStyle:{ fillStyle:color },

        scope: type,
        connectorStyle:{ strokeStyle:color, lineWidth:6 },

        dropOptions : exampleDropOptions,
        
        isSource: !isInput,
        isTarget: isInput,
    }
 }

 </script>
 
 <script>
    var print = function () {
        var output = document.getElementById("output");
        return function (text) {
            output.innerText = output.innerText + "\n" + String(text);
        };
    }();

    var num = 1;
    var objects = {};
    map = function (o, fn) {
        var result = [];
        for (var objectName in objects) {
            var object = objects[objectName];
            result.push(fn(object));
        }
        return result;
    };

    function createInputBlock() {
        var block = document.createElement('div');
        block.className = 'block';
        block.id = "inputBlock" + num;
        document.getElementById("content").appendChild(block);

        var input = document.createElement('input');
        block.appendChild(input);

        // this starts propagating change
        input.addEventListener("change", function () {
            alert("running computations");
            run(block, true);
        }, false);
        // this just passes current value (and is used by input.change)

        block.process = function () {
            return this.value;
        }.bind(input);

        objects[block.id] = {
            process: block.process,
            id: block.id,
        };

        jsPlumb.draggable(block);
        var endpoint = createTypeEndpoint("string", false);
        jsPlumb.addEndpoint(block, { anchor: [1, 0.5, 1, 0] }, endpoint);
    }

    function createOutputBlock() {
        var block = document.createElement('div');
        block.className = 'block';
        block.id = "outputBlock" + num;
        block.type = "outputBlock"; //temp
        document.getElementById("content").appendChild(block);

        var input = document.createElement('input');
        block.appendChild(input);

        block.process = function (input) {
            this.value = input;
        }.bind(input);

        objects[block.id] = {
            process: block.process,
            id: block.id,
        };

        jsPlumb.draggable(block);
        var endpoint = createTypeEndpoint("string", true);
        jsPlumb.addEndpoint(block, { anchor: [0, 0.5, -1, 0] }, endpoint);
    }

    function createBlock(f) {
        var block = document.createElement('div');
        block.className = 'block';
        block.textContent = f.name;
        block.id = String(num++);
        document.getElementById("content").appendChild(block);

        jsPlumb.draggable(block);

        block.process = f;

        // todo: repetition
        objects[block.id] = {
            process: block.process,
            id: block.id,
        };

        f.signature.outs.forEach(function (elem, i) {
            // this formula leaves space before first and after last element
            var pos = (1.0 / (f.signature.outs.length + 1)) * (i + 1);
            var endpoint = createTypeEndpoint(elem, false);

            jsPlumb.addEndpoint(block, { anchor: [1, pos, 1, 0] }, endpoint);
        });

        f.signature.ins.forEach(function (elem, i) {
            // this formula leaves space before first and after last element
            var pos = (1.0 / (f.signature.ins.length + 1)) * (i + 1);
            var endpoint = createTypeEndpoint(elem, true);

            jsPlumb.addEndpoint(block, { anchor: [0, pos, -1, 0] }, endpoint);
        });
    }


    function exportBlocks() {
        var connections = jsPlumb.getAllConnections();
        var exportObjects = map(objects, function (object) {
            var $position = $("#" + object.id).position();

            // "object" represents logical layer
            // "block" part of it is the display/editor layer
            object.block = {
                position: { x: $position.left, y: $position.top },
            };

            return object;
        });

        return {
            connections: connections,
            objects: exportObjects,
        };
    }

    // Usercode
    function add(x, y) {
        return x + y;
    }
    add.signature = { ins: ["int", "int"], outs: ["int"] };

    function mul(x, y) {
        return x * y;
    }
    mul.signature = { ins: ["int", "int"], outs: ["int"] };

    function toUpper(str) {
        return str;
    }
    toUpper.signature = { ins: ["string"], outs: ["string"] };

    function toInt(str) {
        return parseInt(str, 10);
    }
    toInt.signature = { ins: ["string"], outs: ["int"] };

    function toString(num) {
        return String(num);
    }
    toString.signature = { ins: ["int"], outs: ["string"] };

    // more like "poke"
    function run(node, propagate) {
        // todo: profile that vs select
        var inputs = jsPlumb.getAllConnections().filter(function (conn) { return conn.target === node });
        var inputValues = inputs.map(function (input) { return run(input.source, false); });

        var outputValues = node.process.apply(null, inputValues);

        if (node.type === "outputBlock") {
            return;
        }

        if (propagate) {
            var outputs = jsPlumb.select({ source: node.id });
            outputs.each(function (output) { run(output.target, true); });
        }
        else {
            return outputValues;
        }
    }

    $(function () {
        createInputBlock();
        createBlock(add);
        createBlock(mul);
        createBlock(toInt);
        createBlock(toString);
        createOutputBlock();
    });

 </script>
 
 </body>
 
 </html>
	<!doctype html>
	<html>

	<head>
	<title>Blocks Proof of Concept</title>
	<style type="text/css">
	div.block {
	background-color: #36C;
	min-width: 200px;
	height: 100px;
	float: left;
	padding: 10px;

	text-align: center;
	vertical-align: middle;
	font-size: 3em;

	position:absolute;
	}
	</style>
	</head>

	<body>

	<pre id="output"></pre>
	<div id="content"></div>

	<script src="jquery-2.1.0.js" type="text/javascript"></script>
	<script src="jquery-ui-1.10.4.min.js" type="text/javascript"></script>
	<script src="jquery.jsPlumb-1.5.5-min.js" type="text/javascript"></script>

	<!--script src="underscore-min.js" type="text/javascript"></script-->
	<!--script src="traceur/traceur.js" type="text/javascript"></script>
	<script src="traceur/bootstrap.js" type="text/javascript"></script-->
	<!--
	<script src="https://traceur-compiler.googlecode.com/git/bin/traceur.js"
	type="text/javascript"></script>
	<script src="https://traceur-compiler.googlecode.com/git/src/bootstrap.js"
	type="text/javascript"></script>

	-->
	<!--script>
	//traceur.options.experimental = true;
	</script-->

	<script>

	var exampleDropOptions = {
	tolerance:"touch",
	hoverClass:"dropHover",
	activeClass:"dragActive",

	connector: ["Bezier", { curviness:1 } ],
	maxConnections:3,
	endpoint:["Dot", { radius:11 }],
	};

	function getEndpointColorFromType(type) {
	switch (type) {
	case "int" : return "#3399FF";
	case "string" : return "#FF9933";
	default: return "#999999";
	}
	}

	function createTypeEndpoint(type, isInput) {
	var color = getEndpointColorFromType(type);

	return {
	paintStyle:{ fillStyle:color },

	scope: type,
	connectorStyle:{ strokeStyle:color, lineWidth:6 },

	dropOptions : exampleDropOptions,

	isSource: !isInput,
	isTarget: isInput,
	}
	}

	</script>

	<script>
	var print = function () {
	var output = document.getElementById("output");
	return function (text) {
	output.innerText = output.innerText + "\n" + String(text);
	};
	}();

	var num = 1;
	var objects = {};
	map = function (o, fn) {
	var result = [];
	for (var objectName in objects) {
	var object = objects[objectName];
	result.push(fn(object));
	}
	return result;
	};

	function createInputBlock() {
	var block = document.createElement('div');
	block.className = 'block';
	block.id = "inputBlock" + num;
	document.getElementById("content").appendChild(block);

	var input = document.createElement('input');
	block.appendChild(input);

	// this starts propagating change
	input.addEventListener("change", function () {
	alert("running computations");
	run(block, true);
	}, false);
	// this just passes current value (and is used by input.change)

	block.process = function () {
	return this.value;
	}.bind(input);

	objects[block.id] = {
	process: block.process,
	id: block.id,
	};

	jsPlumb.draggable(block);
	var endpoint = createTypeEndpoint("string", false);
	jsPlumb.addEndpoint(block, { anchor: [1, 0.5, 1, 0] }, endpoint);
	}

	function createOutputBlock() {
	var block = document.createElement('div');
	block.className = 'block';
	block.id = "outputBlock" + num;
	block.type = "outputBlock"; //temp
	document.getElementById("content").appendChild(block);

	var input = document.createElement('input');
	block.appendChild(input);

	block.process = function (input) {
	this.value = input;
	}.bind(input);

	objects[block.id] = {
	process: block.process,
	id: block.id,
	};

	jsPlumb.draggable(block);
	var endpoint = createTypeEndpoint("string", true);
	jsPlumb.addEndpoint(block, { anchor: [0, 0.5, -1, 0] }, endpoint);
	}

	function createBlock(f) {
	var block = document.createElement('div');
	block.className = 'block';
	block.textContent = f.name;
	block.id = String(num++);
	document.getElementById("content").appendChild(block);

	jsPlumb.draggable(block);

	block.process = f;

	// todo: repetition
	objects[block.id] = {
	process: block.process,
	id: block.id,
	};

	f.signature.outs.forEach(function (elem, i) {
	// this formula leaves space before first and after last element
	var pos = (1.0 / (f.signature.outs.length + 1)) * (i + 1);
	var endpoint = createTypeEndpoint(elem, false);

	jsPlumb.addEndpoint(block, { anchor: [1, pos, 1, 0] }, endpoint);
	});

	f.signature.ins.forEach(function (elem, i) {
	// this formula leaves space before first and after last element
	var pos = (1.0 / (f.signature.ins.length + 1)) * (i + 1);
	var endpoint = createTypeEndpoint(elem, true);

	jsPlumb.addEndpoint(block, { anchor: [0, pos, -1, 0] }, endpoint);
	});
	}


	function exportBlocks() {
	var connections = jsPlumb.getAllConnections();
	var exportObjects = map(objects, function (object) {
	var $position = $("#" + object.id).position();

	// "object" represents logical layer
	// "block" part of it is the display/editor layer
	object.block = {
	position: { x: $position.left, y: $position.top },
	};

	return object;
	});

	return {
	connections: connections,
	objects: exportObjects,
	};
	}

	// Usercode
	function add(x, y) {
	return x + y;
	}
	add.signature = { ins: ["int", "int"], outs: ["int"] };

	function mul(x, y) {
	return x * y;
	}
	mul.signature = { ins: ["int", "int"], outs: ["int"] };

	function toUpper(str) {
	return str;
	}
	toUpper.signature = { ins: ["string"], outs: ["string"] };

	function toInt(str) {
	return parseInt(str, 10);
	}
	toInt.signature = { ins: ["string"], outs: ["int"] };

	function toString(num) {
	return String(num);
	}
	toString.signature = { ins: ["int"], outs: ["string"] };

	// more like "poke"
	function run(node, propagate) {
	// todo: profile that vs select
	var inputs = jsPlumb.getAllConnections().filter(function (conn) { return conn.target === node });
	var inputValues = inputs.map(function (input) { return run(input.source, false); });

	var outputValues = node.process.apply(null, inputValues);

	if (node.type === "outputBlock") {
	return;
	}

	if (propagate) {
	var outputs = jsPlumb.select({ source: node.id });
	outputs.each(function (output) { run(output.target, true); });
	}
	else {
	return outputValues;
	}
	}

	$(function () {
	createInputBlock();
	createBlock(add);
	createBlock(mul);
	createBlock(toInt);
	createBlock(toString);
	createOutputBlock();
	});

	</script>

	</body>

	</html>