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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>../src/litegraph.js</title>
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<div id="docs-sidebar" class="sidebar apidocs">
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<li><a href="../classes/LGraph.html">LGraph</a></li>
<li><a href="../classes/LGraphCanvas.html">LGraphCanvas</a></li>
<li><a href="../classes/LGraphNode.html">LGraphNode</a></li>
<li><a href="../classes/LiteGraph.html">LiteGraph</a></li>
</ul>
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<h1 class="file-heading">File: ../src/litegraph.js</h1>
<div class="file">
<pre class="code prettyprint linenums">
// *************************************************************
// LiteGraph CLASS *******
// *************************************************************
/**
* The Global Scope. It contains all the registered node classes.
*
* @class LiteGraph
* @constructor
*/
var LiteGraph = {
NODE_TITLE_HEIGHT: 16,
NODE_SLOT_HEIGHT: 15,
NODE_WIDTH: 140,
NODE_MIN_WIDTH: 50,
NODE_COLLAPSED_RADIUS: 10,
NODE_COLLAPSED_WIDTH: 80,
CANVAS_GRID_SIZE: 10,
NODE_TITLE_COLOR: &quot;#222&quot;,
NODE_DEFAULT_COLOR: &quot;#999&quot;,
NODE_DEFAULT_BGCOLOR: &quot;#444&quot;,
NODE_DEFAULT_BOXCOLOR: &quot;#AEF&quot;,
NODE_DEFAULT_SHAPE: &quot;box&quot;,
MAX_NUMBER_OF_NODES: 1000, //avoid infinite loops
DEFAULT_POSITION: [100,100],//default node position
node_images_path: &quot;&quot;,
proxy: null, //used to redirect calls
debug: false,
throw_errors: true,
registered_node_types: {},
Nodes: {},
/**
* Register a node class so it can be listed when the user wants to create a new one
* @method registerNodeType
* @param {String} type name of the node and path
* @param {Class} base_class class containing the structure of a node
*/
registerNodeType: function(type, base_class)
{
if(!base_class.prototype)
throw(&quot;Cannot register a simple object, it must be a class with a prototype&quot;);
base_class.type = type;
if(LiteGraph.debug)
console.log(&quot;Node registered: &quot; + type);
var categories = type.split(&quot;/&quot;);
var pos = type.lastIndexOf(&quot;/&quot;);
base_class.category = type.substr(0,pos);
//info.name = name.substr(pos+1,name.length - pos);
//extend class
if(base_class.prototype) //is a class
for(var i in LGraphNode.prototype)
if(!base_class.prototype[i])
base_class.prototype[i] = LGraphNode.prototype[i];
this.registered_node_types[ type ] = base_class;
if(base_class.constructor.name)
this.Nodes[ base_class.constructor.name ] = base_class;
},
/**
* Create a node of a given type with a name. The node is not attached to any graph yet.
* @method createNode
* @param {String} type full name of the node class. p.e. &quot;math/sin&quot;
* @param {String} name a name to distinguish from other nodes
* @param {Object} options to set options
*/
createNode: function(type, title, options)
{
var base_class = this.registered_node_types[type];
if (!base_class)
{
if(LiteGraph.debug)
console.log(&quot;GraphNode type \&quot;&quot; + type + &quot;\&quot; not registered.&quot;);
return null;
}
var prototype = base_class.prototype || base_class;
title = title || base_class.title || type;
var node = new base_class( name );
node.type = type;
if(!node.title) node.title = title;
if(!node.properties) node.properties = {};
if(!node.flags) node.flags = {};
if(!node.size) node.size = node.computeSize();
if(!node.pos) node.pos = LiteGraph.DEFAULT_POSITION.concat();
//extra options
if(options)
{
for(var i in options)
node[i] = options[i];
}
return node;
},
/**
* Returns a registered node type with a given name
* @method getNodeType
* @param {String} type full name of the node class. p.e. &quot;math/sin&quot;
* @return {Class} the node class
*/
getNodeType: function(type)
{
return this.registered_node_types[type];
},
/**
* Returns a list of node types matching one category
* @method getNodeType
* @param {String} category category name
* @return {Array} array with all the node classes
*/
getNodeTypesInCategory: function(category)
{
var r = [];
for(var i in this.registered_node_types)
if(category == &quot;&quot;)
{
if (this.registered_node_types[i].category == null)
r.push(this.registered_node_types[i]);
}
else if (this.registered_node_types[i].category == category)
r.push(this.registered_node_types[i]);
return r;
},
/**
* Returns a list with all the node type categories
* @method getNodeTypesCategories
* @return {Array} array with all the names of the categories
*/
getNodeTypesCategories: function()
{
var categories = {&quot;&quot;:1};
for(var i in this.registered_node_types)
if(this.registered_node_types[i].category &amp;&amp; !this.registered_node_types[i].skip_list)
categories[ this.registered_node_types[i].category ] = 1;
var result = [];
for(var i in categories)
result.push(i);
return result;
},
//debug purposes: reloads all the js scripts that matches a wilcard
reloadNodes: function (folder_wildcard)
{
var tmp = document.getElementsByTagName(&quot;script&quot;);
//weird, this array changes by its own, so we use a copy
var script_files = [];
for(var i in tmp)
script_files.push(tmp[i]);
var docHeadObj = document.getElementsByTagName(&quot;head&quot;)[0];
folder_wildcard = document.location.href + folder_wildcard;
for(var i in script_files)
{
var src = script_files[i].src;
if( !src || src.substr(0,folder_wildcard.length ) != folder_wildcard)
continue;
try
{
if(LiteGraph.debug)
console.log(&quot;Reloading: &quot; + src);
var dynamicScript = document.createElement(&quot;script&quot;);
dynamicScript.type = &quot;text/javascript&quot;;
dynamicScript.src = src;
docHeadObj.appendChild(dynamicScript);
docHeadObj.removeChild(script_files[i]);
}
catch (err)
{
if(LiteGraph.throw_errors)
throw err;
if(LiteGraph.debug)
console.log(&quot;Error while reloading &quot; + src);
}
}
if(LiteGraph.debug)
console.log(&quot;Nodes reloaded&quot;);
},
//separated just to improve if it doesnt work
cloneObject: function(obj, target)
{
if(obj == null) return null;
var r = JSON.parse( JSON.stringify( obj ) );
if(!target) return r;
for(var i in r)
target[i] = r[i];
return target;
}
};
if(typeof(performance) != &quot;undefined&quot;)
LiteGraph.getTime = function getTime() { return performance.now(); }
else
LiteGraph.getTime = function getTime() { return Date.now(); }
//*********************************************************************************
// LGraph CLASS
//*********************************************************************************
/**
* LGraph is the class that contain a full graph. We instantiate one and add nodes to it, and then we can run the execution loop.
*
* @class LGraph
* @constructor
*/
function LGraph()
{
if (LiteGraph.debug)
console.log(&quot;Graph created&quot;);
this.list_of_graphcanvas = null;
this.clear();
}
//default supported types
LGraph.supported_types = [&quot;number&quot;,&quot;string&quot;,&quot;boolean&quot;];
//used to know which types of connections support this graph (some graphs do not allow certain types)
LGraph.prototype.getSupportedTypes = function() { return this.supported_types || LGraph.supported_types; }
LGraph.STATUS_STOPPED = 1;
LGraph.STATUS_RUNNING = 2;
/**
* Removes all nodes from this graph
* @method clear
*/
LGraph.prototype.clear = function()
{
this.stop();
this.status = LGraph.STATUS_STOPPED;
this.last_node_id = 0;
//nodes
this._nodes = [];
this._nodes_by_id = {};
//links
this.last_link_id = 0;
this.links = {}; //container with all the links
//iterations
this.iteration = 0;
this.config = {
};
//timing
this.globaltime = 0;
this.runningtime = 0;
this.fixedtime = 0;
this.fixedtime_lapse = 0.01;
this.elapsed_time = 0.01;
this.starttime = 0;
//globals
this.global_inputs = {};
this.global_outputs = {};
//this.graph = {};
this.debug = true;
this.change();
this.sendActionToCanvas(&quot;clear&quot;);
}
/**
* Attach Canvas to this graph
* @method attachCanvas
* @param {GraphCanvas} graph_canvas
*/
LGraph.prototype.attachCanvas = function(graphcanvas)
{
if(graphcanvas.constructor != LGraphCanvas)
throw(&quot;attachCanvas expects a LGraphCanvas instance&quot;);
if(graphcanvas.graph &amp;&amp; graphcanvas.graph != this)
graphcanvas.graph.detachCanvas( graphcanvas );
graphcanvas.graph = this;
if(!this.list_of_graphcanvas)
this.list_of_graphcanvas = [];
this.list_of_graphcanvas.push(graphcanvas);
}
/**
* Detach Canvas from this graph
* @method detachCanvas
* @param {GraphCanvas} graph_canvas
*/
LGraph.prototype.detachCanvas = function(graphcanvas)
{
var pos = this.list_of_graphcanvas.indexOf(graphcanvas);
if(pos == -1) return;
graphcanvas.graph = null;
this.list_of_graphcanvas.splice(pos,1);
}
/**
* Starts running this graph every interval milliseconds.
* @method start
* @param {number} interval amount of milliseconds between executions, default is 1
*/
LGraph.prototype.start = function(interval)
{
if(this.status == LGraph.STATUS_RUNNING) return;
this.status = LGraph.STATUS_RUNNING;
if(this.onPlayEvent)
this.onPlayEvent();
this.sendEventToAllNodes(&quot;onStart&quot;);
//launch
this.starttime = LiteGraph.getTime();
interval = interval || 1;
var that = this;
this.execution_timer_id = setInterval( function() {
//execute
that.runStep(1);
},interval);
}
/**
* Stops the execution loop of the graph
* @method stop execution
*/
LGraph.prototype.stop = function()
{
if(this.status == LGraph.STATUS_STOPPED)
return;
this.status = LGraph.STATUS_STOPPED;
if(this.onStopEvent)
this.onStopEvent();
if(this.execution_timer_id != null)
clearInterval(this.execution_timer_id);
this.execution_timer_id = null;
this.sendEventToAllNodes(&quot;onStop&quot;);
}
/**
* Run N steps (cycles) of the graph
* @method runStep
* @param {number} num number of steps to run, default is 1
*/
LGraph.prototype.runStep = function(num)
{
num = num || 1;
var start = LiteGraph.getTime();
this.globaltime = 0.001 * (start - this.starttime);
try
{
for(var i = 0; i &lt; num; i++)
{
this.sendEventToAllNodes(&quot;onExecute&quot;);
this.fixedtime += this.fixedtime_lapse;
if( this.onExecuteStep )
this.onExecuteStep();
}
if( this.onAfterExecute )
this.onAfterExecute();
this.errors_in_execution = false;
}
catch (err)
{
this.errors_in_execution = true;
if(LiteGraph.throw_errors)
throw err;
if(LiteGraph.debug)
console.log(&quot;Error during execution: &quot; + err);
this.stop();
}
var elapsed = LiteGraph.getTime() - start;
if (elapsed == 0) elapsed = 1;
this.elapsed_time = 0.001 * elapsed;
this.globaltime += 0.001 * elapsed;
this.iteration += 1;
}
/**
* Updates the graph execution order according to relevance of the nodes (nodes with only outputs have more relevance than
* nodes with only inputs.
* @method updateExecutionOrder
*/
LGraph.prototype.updateExecutionOrder = function()
{
this._nodes_in_order = this.computeExecutionOrder();
}
//This is more internal, it computes the order and returns it
LGraph.prototype.computeExecutionOrder = function()
{
var L = [];
var S = [];
var M = {};
var visited_links = {}; //to avoid repeating links
var remaining_links = {}; //to a
//search for the nodes without inputs (starting nodes)
for (var i in this._nodes)
{
var n = this._nodes[i];
M[n.id] = n; //add to pending nodes
var num = 0; //num of input connections
if(n.inputs)
for(var j = 0, l = n.inputs.length; j &lt; l; j++)
if(n.inputs[j] &amp;&amp; n.inputs[j].link != null)
num += 1;
if(num == 0) //is a starting node
S.push(n);
else //num of input links
remaining_links[n.id] = num;
}
while(true)
{
if(S.length == 0)
break;
//get an starting node
var n = S.shift();
L.push(n); //add to ordered list
delete M[n.id]; //remove from the pending nodes
//for every output
if(n.outputs)
for(var i = 0; i &lt; n.outputs.length; i++)
{
var output = n.outputs[i];
//not connected
if(output == null || output.links == null || output.links.length == 0)
continue;
//for every connection
for(var j = 0; j &lt; output.links.length; j++)
{
var link_id = output.links[j];
var link = this.links[link_id];
if(!link) continue;
//already visited link (ignore it)
if(visited_links[ link.id ])
continue;
var target_node = this.getNodeById( link.target_id );
if(target_node == null)
{
visited_links[ link.id ] = true;
continue;
}
visited_links[link.id] = true; //mark as visited
remaining_links[target_node.id] -= 1; //reduce the number of links remaining
if (remaining_links[target_node.id] == 0)
S.push(target_node); //if no more links, then add to Starters array
}
}
}
//the remaining ones (loops)
for(var i in M)
L.push(M[i]);
if(L.length != this._nodes.length &amp;&amp; LiteGraph.debug)
console.log(&quot;something went wrong, nodes missing&quot;);
//save order number in the node
for(var i in L)
L[i].order = i;
return L;
}
/**
* Returns the amount of time the graph has been running in milliseconds
* @method getTime
* @return {number} number of milliseconds the graph has been running
*/
LGraph.prototype.getTime = function()
{
return this.globaltime;
}
/**
* Returns the amount of time accumulated using the fixedtime_lapse var. This is used in context where the time increments should be constant
* @method getFixedTime
* @return {number} number of milliseconds the graph has been running
*/
LGraph.prototype.getFixedTime = function()
{
return this.fixedtime;
}
/**
* Returns the amount of time it took to compute the latest iteration. Take into account that this number could be not correct
* if the nodes are using graphical actions
* @method getElapsedTime
* @return {number} number of milliseconds it took the last cycle
*/
LGraph.prototype.getElapsedTime = function()
{
return this.elapsed_time;
}
/**
* Sends an event to all the nodes, useful to trigger stuff
* @method sendEventToAllNodes
* @param {String} eventname the name of the event (function to be called)
* @param {Array} params parameters in array format
*/
LGraph.prototype.sendEventToAllNodes = function(eventname, params)
{
var M = this._nodes_in_order ? this._nodes_in_order : this._nodes;
for(var j in M)
if(M[j][eventname])
{
if(params === undefined)
M[j][eventname]();
else if(params &amp;&amp; params.constructor === Array)
M[j][eventname].apply(M[j], params);
else
M[j][eventname](params);
}
}
LGraph.prototype.sendActionToCanvas = function(action, params)
{
if(!this.list_of_graphcanvas)
return;
for(var i in this.list_of_graphcanvas)
{
var c = this.list_of_graphcanvas[i];
if( c[action] )
c[action].apply(c, params);
}
}
/**
* Adds a new node instasnce to this graph
* @method add
* @param {LGraphNode} node the instance of the node
*/
LGraph.prototype.add = function(node, skip_compute_order)
{
if(!node || (node.id != -1 &amp;&amp; this._nodes_by_id[node.id] != null))
return; //already added
if(this._nodes.length &gt;= LiteGraph.MAX_NUMBER_OF_NODES)
throw(&quot;LiteGraph: max number of nodes in a graph reached&quot;);
//give him an id
if(node.id == null || node.id == -1)
node.id = this.last_node_id++;
node.graph = this;
this._nodes.push(node);
this._nodes_by_id[node.id] = node;
/*
// rendering stuf...
if(node.bgImageUrl)
node.bgImage = node.loadImage(node.bgImageUrl);
*/
if(node.onAdded)
node.onAdded();
if(this.config.align_to_grid)
node.alignToGrid();
if(!skip_compute_order)
this.updateExecutionOrder();
if(this.onNodeAdded)
this.onNodeAdded(node);
this.setDirtyCanvas(true);
this.change();
return node; //to chain actions
}
/**
* Removes a node from the graph
* @method remove
* @param {LGraphNode} node the instance of the node
*/
LGraph.prototype.remove = function(node)
{
if(this._nodes_by_id[node.id] == null)
return; //not found
if(node.ignore_remove)
return; //cannot be removed
//disconnect inputs
if(node.inputs)
for(var i = 0; i &lt; node.inputs.length; i++)
{
var slot = node.inputs[i];
if(slot.link != null)
node.disconnectInput(i);
}
//disconnect outputs
if(node.outputs)
for(var i = 0; i &lt; node.outputs.length; i++)
{
var slot = node.outputs[i];
if(slot.links != null &amp;&amp; slot.links.length)
node.disconnectOutput(i);
}
node.id = -1;
//callback
if(node.onRemoved)
node.onRemoved();
node.graph = null;
//remove from canvas render
for(var i in this.list_of_graphcanvas)
{
var canvas = this.list_of_graphcanvas[i];
if(canvas.selected_nodes[node.id])
delete canvas.selected_nodes[node.id];
if(canvas.node_dragged == node)
canvas.node_dragged = null;
}
//remove from containers
var pos = this._nodes.indexOf(node);
if(pos != -1)
this._nodes.splice(pos,1);
delete this._nodes_by_id[node.id];
if(this.onNodeRemoved)
this.onNodeRemoved(node);
this.setDirtyCanvas(true,true);
this.change();
this.updateExecutionOrder();
}
/**
* Returns a node by its id.
* @method getNodeById
* @param {String} id
*/
LGraph.prototype.getNodeById = function(id)
{
if(id==null) return null;
return this._nodes_by_id[id];
}
/**
* Returns a list of nodes that matches a class
* @method findNodesByClass
* @param {Class} classObject the class itself (not an string)
* @return {Array} a list with all the nodes of this type
*/
LGraph.prototype.findNodesByClass = function(classObject)
{
var r = [];
for(var i in this._nodes)
if(this._nodes[i].constructor === classObject)
r.push(this._nodes[i]);
return r;
}
/**
* Returns a list of nodes that matches a type
* @method findNodesByType
* @param {String} type the name of the node type
* @return {Array} a list with all the nodes of this type
*/
LGraph.prototype.findNodesByType = function(type)
{
var type = type.toLowerCase();
var r = [];
for(var i in this._nodes)
if(this._nodes[i].type.toLowerCase() == type )
r.push(this._nodes[i]);
return r;
}
/**
* Returns a list of nodes that matches a name
* @method findNodesByName
* @param {String} name the name of the node to search
* @return {Array} a list with all the nodes with this name
*/
LGraph.prototype.findNodesByTitle = function(title)
{
var result = [];
for (var i in this._nodes)
if(this._nodes[i].title == title)
result.push(this._nodes[i]);
return result;
}
/**
* Returns the top-most node in this position of the canvas
* @method getNodeOnPos
* @param {number} x the x coordinate in canvas space
* @param {number} y the y coordinate in canvas space
* @param {Array} nodes_list a list with all the nodes to search from, by default is all the nodes in the graph
* @return {Array} a list with all the nodes that intersect this coordinate
*/
LGraph.prototype.getNodeOnPos = function(x,y, nodes_list)
{
nodes_list = nodes_list || this._nodes;
for (var i = nodes_list.length - 1; i &gt;= 0; i--)
{
var n = nodes_list[i];
if(n.isPointInsideNode(x,y))
return n;
}
return null;
}
// ********** GLOBALS *****************
//Tell this graph has a global input of this type
LGraph.prototype.addGlobalInput = function(name, type, value)
{
this.global_inputs[name] = { name: name, type: type, value: value };
if(this.onGlobalInputAdded)
this.onGlobalInputAdded(name, type);
if(this.onGlobalsChange)
this.onGlobalsChange();
}
//assign a data to the global input
LGraph.prototype.setGlobalInputData = function(name, data)
{
var input = this.global_inputs[name];
if (!input)
return;
input.value = data;
}
//assign a data to the global input
LGraph.prototype.getGlobalInputData = function(name)
{
var input = this.global_inputs[name];
if (!input)
return null;
return input.value;
}
//rename the global input
LGraph.prototype.renameGlobalInput = function(old_name, name)
{
if(name == old_name)
return;
if(!this.global_inputs[old_name])
return false;
if(this.global_inputs[name])
{
console.error(&quot;there is already one input with that name&quot;);
return false;
}
this.global_inputs[name] = this.global_inputs[old_name];
delete this.global_inputs[old_name];
if(this.onGlobalInputRenamed)
this.onGlobalInputRenamed(old_name, name);
if(this.onGlobalsChange)
this.onGlobalsChange();
}
LGraph.prototype.changeGlobalInputType = function(name, type)
{
if(!this.global_inputs[name])
return false;
if(this.global_inputs[name].type.toLowerCase() == type.toLowerCase() )
return;
this.global_inputs[name].type = type;
if(this.onGlobalInputTypeChanged)
this.onGlobalInputTypeChanged(name, type);
}
LGraph.prototype.removeGlobalInput = function(name)
{
if(!this.global_inputs[name])
return false;
delete this.global_inputs[name];
if(this.onGlobalInputRemoved)
this.onGlobalInputRemoved(name);
if(this.onGlobalsChange)
this.onGlobalsChange();
return true;
}
LGraph.prototype.addGlobalOutput = function(name, type, value)
{
this.global_outputs[name] = { name: name, type: type, value: value };
if(this.onGlobalOutputAdded)
this.onGlobalOutputAdded(name, type);
if(this.onGlobalsChange)
this.onGlobalsChange();
}
//assign a data to the global output
LGraph.prototype.setGlobalOutputData = function(name, value)
{
var output = this.global_outputs[ name ];
if (!output)
return;
output.value = value;
}
//assign a data to the global input
LGraph.prototype.getGlobalOutputData = function(name)
{
var output = this.global_outputs[name];
if (!output)
return null;
return output.value;
}
//rename the global output
LGraph.prototype.renameGlobalOutput = function(old_name, name)
{
if(!this.global_outputs[old_name])
return false;
if(this.global_outputs[name])
{
console.error(&quot;there is already one output with that name&quot;);
return false;
}
this.global_outputs[name] = this.global_outputs[old_name];
delete this.global_outputs[old_name];
if(this.onGlobalOutputRenamed)
this.onGlobalOutputRenamed(old_name, name);
if(this.onGlobalsChange)
this.onGlobalsChange();
}
LGraph.prototype.changeGlobalOutputType = function(name, type)
{
if(!this.global_outputs[name])
return false;
if(this.global_outputs[name].type.toLowerCase() == type.toLowerCase() )
return;
this.global_outputs[name].type = type;
if(this.onGlobalOutputTypeChanged)
this.onGlobalOutputTypeChanged(name, type);
}
LGraph.prototype.removeGlobalOutput = function(name)
{
if(!this.global_outputs[name])
return false;
delete this.global_outputs[name];
if(this.onGlobalOutputRemoved)
this.onGlobalOutputRemoved(name);
if(this.onGlobalsChange)
this.onGlobalsChange();
return true;
}
/**
* Assigns a value to all the nodes that matches this name. This is used to create global variables of the node that
* can be easily accesed from the outside of the graph
* @method setInputData
* @param {String} name the name of the node
* @param {*} value value to assign to this node
*/
LGraph.prototype.setInputData = function(name,value)
{
var m = this.findNodesByName(name);
for(var i in m)
m[i].setValue(value);
}
/**
* Returns the value of the first node with this name. This is used to access global variables of the graph from the outside
* @method setInputData
* @param {String} name the name of the node
* @return {*} value of the node
*/
LGraph.prototype.getOutputData = function(name)
{
var n = this.findNodesByName(name);
if(n.length)
return m[0].getValue();
return null;
}
//This feature is not finished yet, is to create graphs where nodes are not executed unless a trigger message is received
LGraph.prototype.triggerInput = function(name,value)
{
var m = this.findNodesByName(name);
for(var i in m)
m[i].onTrigger(value);
}
LGraph.prototype.setCallback = function(name,func)
{
var m = this.findNodesByName(name);
for(var i in m)
m[i].setTrigger(func);
}
LGraph.prototype.onConnectionChange = function()
{
this.updateExecutionOrder();
}
/**
* returns if the graph is in live mode
* @method isLive
*/
LGraph.prototype.isLive = function()
{
for(var i in this.list_of_graphcanvas)
{
var c = this.list_of_graphcanvas[i];
if(c.live_mode) return true;
}
return false;
}
/* Called when something visually changed */
LGraph.prototype.change = function()
{
if(LiteGraph.debug)
console.log(&quot;Graph changed&quot;);
this.sendActionToCanvas(&quot;setDirty&quot;,[true,true]);
if(this.on_change)
this.on_change(this);
}
LGraph.prototype.setDirtyCanvas = function(fg,bg)
{
this.sendActionToCanvas(&quot;setDirty&quot;,[fg,bg]);
}
//save and recover app state ***************************************
/**
* Creates a Object containing all the info about this graph, it can be serialized
* @method serialize
* @return {Object} value of the node
*/
LGraph.prototype.serialize = function()
{
var nodes_info = [];
for (var i in this._nodes)
nodes_info.push( this._nodes[i].serialize() );
//remove data from links, we dont want to store it
for (var i in this.links)
this.links[i].data = null;
var data = {
// graph: this.graph,
iteration: this.iteration,
frame: this.frame,
last_node_id: this.last_node_id,
last_link_id: this.last_link_id,
links: LiteGraph.cloneObject( this.links ),
config: this.config,
nodes: nodes_info
};
return data;
}
/**
* Configure a graph from a JSON string
* @method configure
* @param {String} str configure a graph from a JSON string
*/
LGraph.prototype.configure = function(data, keep_old)
{
if(!keep_old)
this.clear();
var nodes = data.nodes;
//copy all stored fields
for (var i in data)
this[i] = data[i];
var error = false;
//create nodes
this._nodes = [];
for (var i in nodes)
{
var n_info = nodes[i]; //stored info
var node = LiteGraph.createNode( n_info.type, n_info.title );
if(!node)
{
if(LiteGraph.debug)
console.log(&quot;Node not found: &quot; + n_info.type);
error = true;
continue;
}
node.id = n_info.id; //id it or it will create a new id
this.add(node, true); //add before configure, otherwise configure cannot create links
node.configure(n_info);
}
this.updateExecutionOrder();
this.setDirtyCanvas(true,true);
return error;
}
LGraph.prototype.onNodeTrace = function(node, msg, color)
{
//TODO
}
// *************************************************************
// Node CLASS *******
// *************************************************************
/* flags:
+ skip_title_render
+ clip_area
+ unsafe_execution: not allowed for safe execution
supported callbacks:
+ onAdded: when added to graph
+ onRemoved: when removed from graph
+ onStart: when starts playing
+ onStop: when stops playing
+ onDrawForeground: render the inside widgets inside the node
+ onDrawBackground: render the background area inside the node (only in edit mode)
+ onMouseDown
+ onMouseMove
+ onMouseUp
+ onMouseEnter
+ onMouseLeave
+ onExecute: execute the node
+ onPropertyChange: when a property is changed in the panel (return true to skip default behaviour)
+ onGetInputs: returns an array of possible inputs
+ onGetOutputs: returns an array of possible outputs
+ onDblClick
+ onSerialize
+ onSelected
+ onDeselected
+ onDropFile
*/
/**
* Base Class for all the node type classes
* @class LGraphNode
* @param {String} name a name for the node
*/
function LGraphNode(title)
{
this._ctor();
}
LGraphNode.prototype._ctor = function( title )
{
this.title = title || &quot;Unnamed&quot;;
this.size = [LiteGraph.NODE_WIDTH,60];
this.graph = null;
this.pos = [10,10];
this.id = -1; //not know till not added
this.type = null;
//inputs available: array of inputs
this.inputs = [];
this.outputs = [];
this.connections = [];
//local data
this.properties = {};
this.data = null; //persistent local data
this.flags = {
//skip_title_render: true,
//unsafe_execution: false,
};
}
/**
* configure a node from an object containing the serialized info
* @method configure
*/
LGraphNode.prototype.configure = function(info)
{
for (var j in info)
{
if(j == &quot;console&quot;) continue;
if(j == &quot;properties&quot;)
{
//i dont want to clone properties, I want to reuse the old container
for(var k in info.properties)
this.properties[k] = info.properties[k];
continue;
}
if(info[j] == null)
continue;
else if (typeof(info[j]) == &#x27;object&#x27;) //object
{
if(this[j] &amp;&amp; this[j].configure)
this[j].configure( info[j] );
else
this[j] = LiteGraph.cloneObject(info[j], this[j]);
}
else //value
this[j] = info[j];
}
//FOR LEGACY, PLEASE REMOVE ON NEXT VERSION
for(var i in this.inputs)
{
var input = this.inputs[i];
if(!input.link || !input.link.length )
continue;
var link = input.link;
if(typeof(link) != &quot;object&quot;)
continue;
input.link = link[0];
this.graph.links[ link[0] ] = { id: link[0], origin_id: link[1], origin_slot: link[2], target_id: link[3], target_slot: link[4] };
}
for(var i in this.outputs)
{
var output = this.outputs[i];
if(!output.links || output.links.length == 0)
continue;
for(var j in output.links)
{
var link = output.links[j];
if(typeof(link) != &quot;object&quot;)
continue;
output.links[j] = link[0];
}
}
}
/**
* serialize the content
* @method serialize
*/
LGraphNode.prototype.serialize = function()
{
var o = {
id: this.id,
title: this.title,
type: this.type,
pos: this.pos,
size: this.size,
data: this.data,
flags: LiteGraph.cloneObject(this.flags),
inputs: this.inputs,
outputs: this.outputs
};
if(this.properties)
o.properties = LiteGraph.cloneObject(this.properties);
if(!o.type)
o.type = this.constructor.type;
if(this.color)
o.color = this.color;
if(this.bgcolor)
o.bgcolor = this.bgcolor;
if(this.boxcolor)
o.boxcolor = this.boxcolor;
if(this.shape)
o.shape = this.shape;
if(this.onSerialize)
this.onSerialize(o);
return o;
}
/* Creates a clone of this node */
LGraphNode.prototype.clone = function()
{
var node = LiteGraph.createNode(this.type);
var data = this.serialize();
delete data[&quot;id&quot;];
node.configure(data);
return node;
}
/**
* serialize and stringify
* @method toString
*/
LGraphNode.prototype.toString = function()
{
return JSON.stringify( this.serialize() );
}
//LGraphNode.prototype.unserialize = function(info) {} //this cannot be done from within, must be done in LiteGraph
/**
* get the title string
* @method getTitle
*/
LGraphNode.prototype.getTitle = function()
{
return this.title || this.constructor.title;
}
// Execution *************************
/**
* sets the output data
* @method setOutputData
* @param {number} slot
* @param {*} data
*/
LGraphNode.prototype.setOutputData = function(slot,data)
{
if(!this.outputs)
return;
if(slot &gt; -1 &amp;&amp; slot &lt; this.outputs.length &amp;&amp; this.outputs[slot] &amp;&amp; this.outputs[slot].links != null)
{
for(var i = 0; i &lt; this.outputs[slot].links.length; i++)
{
var link_id = this.outputs[slot].links[i];
this.graph.links[ link_id ].data = data;
}
}
}
/**
* retrieves the input data (data traveling through the connection) from one slot
* @method getInputData
* @param {number} slot
* @return {*} data
*/
LGraphNode.prototype.getInputData = function(slot)
{
if(!this.inputs)
return; //undefined;
if(slot &lt; this.inputs.length &amp;&amp; this.inputs[slot].link != null)
return this.graph.links[ this.inputs[slot].link ].data;
return; //undefined;
}
/**
* tells you if there is a connection in one input slot
* @method isInputConnected
* @param {number} slot
* @return {boolean}
*/
LGraphNode.prototype.isInputConnected = function(slot)
{
if(!this.inputs)
return false;
return (slot &lt; this.inputs.length &amp;&amp; this.inputs[slot].link != null);
}
/**
* tells you info about an input connection (which node, type, etc)
* @method getInputInfo
* @param {number} slot
* @return {Object}
*/
LGraphNode.prototype.getInputInfo = function(slot)
{
if(!this.inputs) return null;
if(slot &lt; this.inputs.length)
return this.inputs[slot];
return null;
}
/**
* tells you info about an output connection (which node, type, etc)
* @method getOutputInfo
* @param {number} slot
* @return {Object}
*/
LGraphNode.prototype.getOutputInfo = function(slot)
{
if(!this.outputs) return null;
if(slot &lt; this.outputs.length)
return this.outputs[slot];
return null;
}
/**
* tells you if there is a connection in one output slot
* @method isOutputConnected
* @param {number} slot
* @return {boolean}
*/
LGraphNode.prototype.isOutputConnected = function(slot)
{
if(!this.outputs) return null;
return (slot &lt; this.outputs.length &amp;&amp; this.outputs[slot].links &amp;&amp; this.outputs[slot].links.length);
}
/**
* retrieves all the nodes connected to this output slot
* @method getOutputNodes
* @param {number} slot
* @return {array}
*/
LGraphNode.prototype.getOutputNodes = function(slot)
{
if(!this.outputs || this.outputs.length == 0) return null;
if(slot &lt; this.outputs.length)
{
var output = this.outputs[slot];
var r = [];
for(var i = 0; i &lt; output.length; i++)
r.push( this.graph.getNodeById( output.links[i].target_id ));
return r;
}
return null;
}
LGraphNode.prototype.triggerOutput = function(slot,param)
{
var n = this.getOutputNode(slot);
if(n &amp;&amp; n.onTrigger)
n.onTrigger(param);
}
//connections
/**
* add a new output slot to use in this node
* @method addOutput
* @param {string} name
* @param {string} type string defining the output type (&quot;vec3&quot;,&quot;number&quot;,...)
* @param {Object} extra_info this can be used to have special properties of an output (label, special color, position, etc)
*/
LGraphNode.prototype.addOutput = function(name,type,extra_info)
{
var o = {name:name,type:type,links:null};
if(extra_info)
for(var i in extra_info)
o[i] = extra_info[i];
if(!this.outputs) this.outputs = [];
this.outputs.push(o);
if(this.onOutputAdded)
this.onOutputAdded(o);
this.size = this.computeSize();
}
/**
* add a new output slot to use in this node
* @method addOutputs
* @param {Array} array of triplets like [[name,type,extra_info],[...]]
*/
LGraphNode.prototype.addOutputs = function(array)
{
for(var i in array)
{
var info = array[i];
var o = {name:info[0],type:info[1],link:null};
if(array[2])
for(var j in info[2])
o[j] = info[2][j];
if(!this.outputs)
this.outputs = [];
this.outputs.push(o);
if(this.onOutputAdded)
this.onOutputAdded(o);
}
this.size = this.computeSize();
}
/**
* remove an existing output slot
* @method removeOutput
* @param {number} slot
*/
LGraphNode.prototype.removeOutput = function(slot)
{
this.disconnectOutput(slot);
this.outputs.splice(slot,1);
this.size = this.computeSize();
if(this.onOutputRemoved)
this.onOutputRemoved(slot);
}
/**
* add a new input slot to use in this node
* @method addInput
* @param {string} name
* @param {string} type string defining the input type (&quot;vec3&quot;,&quot;number&quot;,...), it its a generic one use 0
* @param {Object} extra_info this can be used to have special properties of an input (label, color, position, etc)
*/
LGraphNode.prototype.addInput = function(name,type,extra_info)
{
type = type || 0;
var o = {name:name,type:type,link:null};
if(extra_info)
for(var i in extra_info)
o[i] = extra_info[i];
if(!this.inputs) this.inputs = [];
this.inputs.push(o);
this.size = this.computeSize();
if(this.onInputAdded)
this.onInputAdded(o);
}
/**
* add several new input slots in this node
* @method addInputs
* @param {Array} array of triplets like [[name,type,extra_info],[...]]
*/
LGraphNode.prototype.addInputs = function(array)
{
for(var i in array)
{
var info = array[i];
var o = {name:info[0], type:info[1], link:null};
if(array[2])
for(var j in info[2])
o[j] = info[2][j];
if(!this.inputs)
this.inputs = [];
this.inputs.push(o);
if(this.onInputAdded)
this.onInputAdded(o);
}
this.size = this.computeSize();
}
/**
* remove an existing input slot
* @method removeInput
* @param {number} slot
*/
LGraphNode.prototype.removeInput = function(slot)
{
this.disconnectInput(slot);
this.inputs.splice(slot,1);
this.size = this.computeSize();
if(this.onInputRemoved)
this.onInputRemoved(slot);
}
/**
* add an special connection to this node (used for special kinds of graphs)
* @method addConnection
* @param {string} name
* @param {string} type string defining the input type (&quot;vec3&quot;,&quot;number&quot;,...)
* @param {[x,y]} pos position of the connection inside the node
* @param {string} direction if is input or output
*/
LGraphNode.prototype.addConnection = function(name,type,pos,direction)
{
this.connections.push( {name:name,type:type,pos:pos,direction:direction,links:null});
}
/**
* computes the size of a node according to its inputs and output slots
* @method computeSize
* @param {number} minHeight
* @return {number} the total size
*/
LGraphNode.prototype.computeSize = function(minHeight)
{
var rows = Math.max( this.inputs ? this.inputs.length : 1, this.outputs ? this.outputs.length : 1);
var size = new Float32Array([0,0]);
size[1] = rows * 14 + 6;
if(!this.inputs || this.inputs.length == 0 || !this.outputs || this.outputs.length == 0)
size[0] = LiteGraph.NODE_WIDTH * 0.5;
else
size[0] = LiteGraph.NODE_WIDTH;
return size;
}
/**
* returns the bounding of the object, used for rendering purposes
* @method getBounding
* @return {Float32Array[4]} the total size
*/
LGraphNode.prototype.getBounding = function()
{
return new Float32Array([this.pos[0] - 4, this.pos[1] - LiteGraph.NODE_TITLE_HEIGHT, this.pos[0] + this.size[0] + 4, this.pos[1] + this.size[1] + LGraph.NODE_TITLE_HEIGHT]);
}
/**
* checks if a point is inside the shape of a node
* @method isPointInsideNode
* @param {number} x
* @param {number} y
* @return {boolean}
*/
LGraphNode.prototype.isPointInsideNode = function(x,y)
{
var margin_top = this.graph &amp;&amp; this.graph.isLive() ? 0 : 20;
if(this.flags.collapsed)
{
//if ( distance([x,y], [this.pos[0] + this.size[0]*0.5, this.pos[1] + this.size[1]*0.5]) &lt; LiteGraph.NODE_COLLAPSED_RADIUS)
if( isInsideRectangle(x,y, this.pos[0], this.pos[1] - LiteGraph.NODE_TITLE_HEIGHT, LiteGraph.NODE_COLLAPSED_WIDTH, LiteGraph.NODE_TITLE_HEIGHT) )
return true;
}
else if (this.pos[0] - 4 &lt; x &amp;&amp; (this.pos[0] + this.size[0] + 4) &gt; x
&amp;&amp; (this.pos[1] - margin_top) &lt; y &amp;&amp; (this.pos[1] + this.size[1]) &gt; y)
return true;
return false;
}
/**
* returns the input slot with a given name (used for dynamic slots), -1 if not found
* @method findInputSlot
* @param {string} name the name of the slot
* @return {number} the slot (-1 if not found)
*/
LGraphNode.prototype.findInputSlot = function(name)
{
if(!this.inputs) return -1;
for(var i = 0, l = this.inputs.length; i &lt; l; ++i)
if(name == this.inputs[i].name)
return i;
return -1;
}
/**
* returns the output slot with a given name (used for dynamic slots), -1 if not found
* @method findOutputSlot
* @param {string} name the name of the slot
* @return {number} the slot (-1 if not found)
*/
LGraphNode.prototype.findOutputSlot = function(name)
{
if(!this.outputs) return -1;
for(var i = 0, l = this.outputs.length; i &lt; l; ++i)
if(name == this.outputs[i].name)
return i;
return -1;
}
/**
* connect this node output to the input of another node
* @method connect
* @param {number_or_string} slot (could be the number of the slot or the string with the name of the slot)
* @param {LGraphNode} node the target node
* @param {number_or_string} target_slot the input slot of the target node (could be the number of the slot or the string with the name of the slot)
* @return {boolean} if it was connected succesfully
*/
LGraphNode.prototype.connect = function(slot, node, target_slot)
{
target_slot = target_slot || 0;
//seek for the output slot
if( slot.constructor === String )
{
slot = this.findOutputSlot(slot);
if(slot == -1)
{
if(LiteGraph.debug)
console.log(&quot;Connect: Error, no slot of name &quot; + slot);
return false;
}
}
else if(!this.outputs || slot &gt;= this.outputs.length)
{
if(LiteGraph.debug)
console.log(&quot;Connect: Error, slot number not found&quot;);
return false;
}
//avoid loopback
if(node == this) return false;
//if( node.constructor != LGraphNode ) throw (&quot;LGraphNode.connect: node is not of type LGraphNode&quot;);
if(target_slot.constructor === String)
{
target_slot = node.findInputSlot(target_slot);
if(target_slot == -1)
{
if(LiteGraph.debug)
console.log(&quot;Connect: Error, no slot of name &quot; + target_slot);
return false;
}
}
else if(!node.inputs || target_slot &gt;= node.inputs.length)
{
if(LiteGraph.debug)
console.log(&quot;Connect: Error, slot number not found&quot;);
return false;
}
//if there is something already plugged there, disconnect
if(target_slot != -1 &amp;&amp; node.inputs[target_slot].link != null)
node.disconnectInput(target_slot);
//special case: -1 means node-connection, used for triggers
var output = this.outputs[slot];
if(target_slot == -1)
{
if( output.links == null )
output.links = [];
output.links.push({id:node.id, slot: -1});
}
else if( !output.type || //generic output
!node.inputs[target_slot].type || //generic input
output.type.toLowerCase() == node.inputs[target_slot].type.toLowerCase() ) //same type
{
//info: link structure =&gt; [ 0:link_id, 1:start_node_id, 2:start_slot, 3:end_node_id, 4:end_slot ]
//var link = [ this.graph.last_link_id++, this.id, slot, node.id, target_slot ];
var link = { id: this.graph.last_link_id++, origin_id: this.id, origin_slot: slot, target_id: node.id, target_slot: target_slot };
this.graph.links[ link.id ] = link;
//connect
if( output.links == null ) output.links = [];
output.links.push( link.id );
node.inputs[target_slot].link = link.id;
this.setDirtyCanvas(false,true);
this.graph.onConnectionChange();
}
return true;
}
/**
* disconnect one output to an specific node
* @method disconnectOutput
* @param {number_or_string} slot (could be the number of the slot or the string with the name of the slot)
* @param {LGraphNode} target_node the target node to which this slot is connected [Optional, if not target_node is specified all nodes will be disconnected]
* @return {boolean} if it was disconnected succesfully
*/
LGraphNode.prototype.disconnectOutput = function(slot, target_node)
{
if( slot.constructor === String )
{
slot = this.findOutputSlot(slot);
if(slot == -1)
{
if(LiteGraph.debug)
console.log(&quot;Connect: Error, no slot of name &quot; + slot);
return false;
}
}
else if(!this.outputs || slot &gt;= this.outputs.length)
{
if(LiteGraph.debug)
console.log(&quot;Connect: Error, slot number not found&quot;);
return false;
}
//get output slot
var output = this.outputs[slot];
if(!output.links || output.links.length == 0)
return false;
if(target_node)
{
for(var i = 0, l = output.links.length; i &lt; l; i++)
{
var link_id = output.links[i];
var link_info = this.graph.links[ link_id ];
//is the link we are searching for...
if( link_info.target_id == target_node.id )
{
output.links.splice(i,1); //remove here
target_node.inputs[ link_info.target_slot ].link = null; //remove there
delete this.graph.links[ link_id ]; //remove the link from the links pool
break;
}
}
}
else
{
for(var i = 0, l = output.links.length; i &lt; l; i++)
{
var link_id = output.links[i];
var link_info = this.graph.links[ link_id ];
var target_node = this.graph.getNodeById( link_info.target_id );
if(target_node)
target_node.inputs[ link_info.target_slot ].link = null; //remove other side link
}
output.links = null;
}
this.setDirtyCanvas(false,true);
this.graph.onConnectionChange();
return true;
}
/**
* disconnect one input
* @method disconnectInput
* @param {number_or_string} slot (could be the number of the slot or the string with the name of the slot)
* @return {boolean} if it was disconnected succesfully
*/
LGraphNode.prototype.disconnectInput = function(slot)
{
//seek for the output slot
if( slot.constructor === String )
{
slot = this.findInputSlot(slot);
if(slot == -1)
{
if(LiteGraph.debug)
console.log(&quot;Connect: Error, no slot of name &quot; + slot);
return false;
}
}
else if(!this.inputs || slot &gt;= this.inputs.length)
{
if(LiteGraph.debug)
console.log(&quot;Connect: Error, slot number not found&quot;);
return false;
}
var input = this.inputs[slot];
if(!input) return false;
var link_id = this.inputs[slot].link;
this.inputs[slot].link = null;
//remove other side
var link_info = this.graph.links[ link_id ];
var node = this.graph.getNodeById( link_info.origin_id );
if(!node) return false;
var output = node.outputs[ link_info.origin_slot ];
if(!output || !output.links || output.links.length == 0)
return false;
//check outputs
for(var i = 0, l = output.links.length; i &lt; l; i++)
{
var link_id = output.links[i];
var link_info = this.graph.links[ link_id ];
if( link_info.target_id == this.id )
{
output.links.splice(i,1);
break;
}
}
this.setDirtyCanvas(false,true);
this.graph.onConnectionChange();
return true;
}
/**
* returns the center of a connection point in canvas coords
* @method getConnectionPos
* @param {boolean} is_input true if if a input slot, false if it is an output
* @param {number_or_string} slot (could be the number of the slot or the string with the name of the slot)
* @return {[x,y]} the position
**/
LGraphNode.prototype.getConnectionPos = function(is_input,slot_number)
{
if(this.flags.collapsed)
{
if(is_input)
return [this.pos[0], this.pos[1] - LiteGraph.NODE_TITLE_HEIGHT * 0.5];
else
return [this.pos[0] + LiteGraph.NODE_COLLAPSED_WIDTH, this.pos[1] - LiteGraph.NODE_TITLE_HEIGHT * 0.5];
//return [this.pos[0] + this.size[0] * 0.5, this.pos[1] + this.size[1] * 0.5];
}
if(is_input &amp;&amp; slot_number == -1)
{
return [this.pos[0] + 10, this.pos[1] + 10];
}
if(is_input &amp;&amp; this.inputs.length &gt; slot_number &amp;&amp; this.inputs[slot_number].pos)
return [this.pos[0] + this.inputs[slot_number].pos[0],this.pos[1] + this.inputs[slot_number].pos[1]];
else if(!is_input &amp;&amp; this.outputs.length &gt; slot_number &amp;&amp; this.outputs[slot_number].pos)
return [this.pos[0] + this.outputs[slot_number].pos[0],this.pos[1] + this.outputs[slot_number].pos[1]];
if(!is_input) //output
return [this.pos[0] + this.size[0] + 1, this.pos[1] + 10 + slot_number * LiteGraph.NODE_SLOT_HEIGHT];
return [this.pos[0] , this.pos[1] + 10 + slot_number * LiteGraph.NODE_SLOT_HEIGHT];
}
/* Force align to grid */
LGraphNode.prototype.alignToGrid = function()
{
this.pos[0] = LiteGraph.CANVAS_GRID_SIZE * Math.round(this.pos[0] / LiteGraph.CANVAS_GRID_SIZE);
this.pos[1] = LiteGraph.CANVAS_GRID_SIZE * Math.round(this.pos[1] / LiteGraph.CANVAS_GRID_SIZE);
}
/* Console output */
LGraphNode.prototype.trace = function(msg)
{
if(!this.console)
this.console = [];
this.console.push(msg);
if(this.console.length &gt; LGraphNode.MAX_CONSOLE)
this.console.shift();
this.graph.onNodeTrace(this,msg);
}
/* Forces to redraw or the main canvas (LGraphNode) or the bg canvas (links) */
LGraphNode.prototype.setDirtyCanvas = function(dirty_foreground, dirty_background)
{
if(!this.graph)
return;
this.graph.sendActionToCanvas(&quot;setDirty&quot;,[dirty_foreground, dirty_background]);
}
LGraphNode.prototype.loadImage = function(url)
{
var img = new Image();
img.src = LiteGraph.node_images_path + url;
img.ready = false;
var that = this;
img.onload = function() {
this.ready = true;
that.setDirtyCanvas(true);
}
return img;
}
//safe LGraphNode action execution (not sure if safe)
LGraphNode.prototype.executeAction = function(action)
{
if(action == &quot;&quot;) return false;
if( action.indexOf(&quot;;&quot;) != -1 || action.indexOf(&quot;}&quot;) != -1)
{
this.trace(&quot;Error: Action contains unsafe characters&quot;);
return false;
}
var tokens = action.split(&quot;(&quot;);
var func_name = tokens[0];
if( typeof(this[func_name]) != &quot;function&quot;)
{
this.trace(&quot;Error: Action not found on node: &quot; + func_name);
return false;
}
var code = action;
try
{
var _foo = eval;
eval = null;
(new Function(&quot;with(this) { &quot; + code + &quot;}&quot;)).call(this);
eval = _foo;
}
catch (err)
{
this.trace(&quot;Error executing action {&quot; + action + &quot;} :&quot; + err);
return false;
}
return true;
}
/* Allows to get onMouseMove and onMouseUp events even if the mouse is out of focus */
LGraphNode.prototype.captureInput = function(v)
{
if(!this.graph || !this.graph.list_of_graphcanvas)
return;
var list = this.graph.list_of_graphcanvas;
for(var i in list)
{
var c = list[i];
//releasing somebody elses capture?!
if(!v &amp;&amp; c.node_capturing_input != this)
continue;
//change
c.node_capturing_input = v ? this : null;
}
}
/**
* Collapse the node to make it smaller on the canvas
* @method collapse
**/
LGraphNode.prototype.collapse = function()
{
if(!this.flags.collapsed)
this.flags.collapsed = true;
else
this.flags.collapsed = false;
this.setDirtyCanvas(true,true);
}
/**
* Forces the node to do not move or realign on Z
* @method pin
**/
LGraphNode.prototype.pin = function(v)
{
if(v === undefined)
this.flags.pinned = !this.flags.pinned;
else
this.flags.pinned = v;
}
LGraphNode.prototype.localToScreen = function(x,y, graphcanvas)
{
return [(x + this.pos[0]) * graphcanvas.scale + graphcanvas.offset[0],
(y + this.pos[1]) * graphcanvas.scale + graphcanvas.offset[1]];
}
//*********************************************************************************
// LGraphCanvas: LGraph renderer CLASS
//*********************************************************************************
/**
* The Global Scope. It contains all the registered node classes.
*
* @class LGraphCanvas
* @constructor
* @param {HTMLCanvas} canvas the canvas where you want to render (it accepts a selector in string format or the canvas itself)
* @param {LGraph} graph [optional]
*/
function LGraphCanvas( canvas, graph, skip_render )
{
//if(graph === undefined)
// throw (&quot;No graph assigned&quot;);
if(canvas &amp;&amp; canvas.constructor === String )
canvas = document.querySelector( canvas );
this.max_zoom = 10;
this.min_zoom = 0.1;
//link canvas and graph
if(graph)
graph.attachCanvas(this);
this.setCanvas( canvas );
this.clear();
if(!skip_render)
this.startRendering();
}
LGraphCanvas.link_type_colors = {&#x27;number&#x27;:&quot;#AAC&quot;,&#x27;node&#x27;:&quot;#DCA&quot;};
/**
* clears all the data inside
*
* @method clear
*/
LGraphCanvas.prototype.clear = function()
{
this.frame = 0;
this.last_draw_time = 0;
this.render_time = 0;
this.fps = 0;
this.scale = 1;
this.offset = [0,0];
this.selected_nodes = {};
this.node_dragged = null;
this.node_over = null;
this.node_capturing_input = null;
this.connecting_node = null;
this.highquality_render = true;
this.editor_alpha = 1; //used for transition
this.pause_rendering = false;
this.render_shadows = true;
this.clear_background = true;
this.render_only_selected = true;
this.live_mode = false;
this.show_info = true;
this.allow_dragcanvas = true;
this.allow_dragnodes = true;
this.dirty_canvas = true;
this.dirty_bgcanvas = true;
this.dirty_area = null;
this.node_in_panel = null;
this.last_mouse = [0,0];
this.last_mouseclick = 0;
this.title_text_font = &quot;bold 14px Arial&quot;;
this.inner_text_font = &quot;normal 12px Arial&quot;;
this.render_connections_shadows = false; //too much cpu
this.render_connections_border = true;
this.render_curved_connections = true;
this.render_connection_arrows = true;
this.connections_width = 4;
if(this.onClear) this.onClear();
//this.UIinit();
}
/**
* assigns a graph, you can reasign graphs to the same canvas
*
* @method setGraph
* @param {LGraph} graph
*/
LGraphCanvas.prototype.setGraph = function( graph, skip_clear )
{
if(this.graph == graph)
return;
if(!skip_clear)
this.clear();
if(!graph &amp;&amp; this.graph)
{
this.graph.detachCanvas(this);
return;
}
/*
if(this.graph)
this.graph.canvas = null; //remove old graph link to the canvas
this.graph = graph;
if(this.graph)
this.graph.canvas = this;
*/
graph.attachCanvas(this);
this.setDirty(true,true);
}
/**
* opens a graph contained inside a node in the current graph
*
* @method openSubgraph
* @param {LGraph} graph
*/
LGraphCanvas.prototype.openSubgraph = function(graph)
{
if(!graph)
throw(&quot;graph cannot be null&quot;);
if(this.graph == graph)
throw(&quot;graph cannot be the same&quot;);
this.clear();
if(this.graph)
{
if(!this._graph_stack)
this._graph_stack = [];
this._graph_stack.push(this.graph);
}
graph.attachCanvas(this);
this.setDirty(true,true);
}
/**
* closes a subgraph contained inside a node
*
* @method closeSubgraph
* @param {LGraph} assigns a graph
*/
LGraphCanvas.prototype.closeSubgraph = function()
{
if(!this._graph_stack || this._graph_stack.length == 0)
return;
var graph = this._graph_stack.pop();
graph.attachCanvas(this);
this.setDirty(true,true);
}
/**
* assigns a canvas
*
* @method setCanvas
* @param {Canvas} assigns a canvas
*/
LGraphCanvas.prototype.setCanvas = function( canvas, skip_events )
{
var that = this;
if(canvas)
{
if( canvas.constructor === String )
{
canvas = document.getElementById(canvas);
if(!canvas)
throw(&quot;Error creating LiteGraph canvas: Canvas not found&quot;);
}
}
if(canvas === this.canvas)
return;
if(!canvas &amp;&amp; this.canvas)
{
//maybe detach events from old_canvas
if(!skip_events)
this.unbindEvents();
}
this.canvas = canvas;
if(!canvas)
return;
//this.canvas.tabindex = &quot;1000&quot;;
canvas.className += &quot; lgraphcanvas&quot;;
canvas.data = this;
//bg canvas: used for non changing stuff
this.bgcanvas = null;
if(!this.bgcanvas)
{
this.bgcanvas = document.createElement(&quot;canvas&quot;);
this.bgcanvas.width = this.canvas.width;
this.bgcanvas.height = this.canvas.height;
}
if(canvas.getContext == null)
{
throw(&quot;This browser doesnt support Canvas&quot;);
}
var ctx = this.ctx = canvas.getContext(&quot;2d&quot;);
if(ctx == null)
{
console.warn(&quot;This canvas seems to be WebGL, enabling WebGL renderer&quot;);
this.enableWebGL();
}
//input: (move and up could be unbinded)
this._mousemove_callback = this.processMouseMove.bind(this);
this._mouseup_callback = this.processMouseUp.bind(this);
if(!skip_events)
this.bindEvents();
}
//used in some events to capture them
LGraphCanvas.prototype._doNothing = function doNothing() { return false; };
LGraphCanvas.prototype.bindEvents = function()
{
if( this._events_binded )
{
console.warn(&quot;LGraphCanvas: events already binded&quot;);
return;
}
var canvas = this.canvas;
this._mousedown_callback = this.processMouseDown.bind(this);
this._mousewheel_callback = this.processMouseWheel.bind(this);
canvas.addEventListener(&quot;mousedown&quot;, this._mousedown_callback, true ); //down do not need to store the binded
canvas.addEventListener(&quot;mousemove&quot;, this._mousemove_callback );
canvas.addEventListener(&quot;mousewheel&quot;, this._mousewheel_callback, false);
canvas.addEventListener(&quot;contextmenu&quot;, this._doNothing );
canvas.addEventListener(&quot;DOMMouseScroll&quot;, this._mousewheel_callback, false);
//touch events
//if( &#x27;touchstart&#x27; in document.documentElement )
{
canvas.addEventListener(&quot;touchstart&quot;, this.touchHandler, true);
canvas.addEventListener(&quot;touchmove&quot;, this.touchHandler, true);
canvas.addEventListener(&quot;touchend&quot;, this.touchHandler, true);
canvas.addEventListener(&quot;touchcancel&quot;, this.touchHandler, true);
}
//Keyboard ******************
this._key_callback = this.processKey.bind(this);
canvas.addEventListener(&quot;keydown&quot;, this._key_callback );
canvas.addEventListener(&quot;keyup&quot;, this._key_callback );
//Droping Stuff over nodes ************************************
this._ondrop_callback = this.processDrop.bind(this);
canvas.addEventListener(&quot;dragover&quot;, this._doNothing, false );
canvas.addEventListener(&quot;dragend&quot;, this._doNothing, false );
canvas.addEventListener(&quot;drop&quot;, this._ondrop_callback, false );
this._events_binded = true;
}
LGraphCanvas.prototype.unbindEvents = function()
{
if( !this._events_binded )
{
console.warn(&quot;LGraphCanvas: no events binded&quot;);
return;
}
this.canvas.removeEventListener( &quot;mousedown&quot;, this._mousedown_callback );
this.canvas.removeEventListener( &quot;mousewheel&quot;, this._mousewheel_callback );
this.canvas.removeEventListener( &quot;DOMMouseScroll&quot;, this._mousewheel_callback );
this.canvas.removeEventListener( &quot;keydown&quot;, this._key_callback );
this.canvas.removeEventListener( &quot;keyup&quot;, this._key_callback );
this.canvas.removeEventListener( &quot;contextmenu&quot;, this._doNothing );
this.canvas.removeEventListener( &quot;drop&quot;, this._ondrop_callback );
this.canvas.removeEventListener(&quot;touchstart&quot;, this.touchHandler );
this.canvas.removeEventListener(&quot;touchmove&quot;, this.touchHandler );
this.canvas.removeEventListener(&quot;touchend&quot;, this.touchHandler );
this.canvas.removeEventListener(&quot;touchcancel&quot;, this.touchHandler );
this._mousedown_callback = null;
this._mousewheel_callback = null;
this._key_callback = null;
this._ondrop_callback = null;
this._events_binded = false;
}
LGraphCanvas.getFileExtension = function (url)
{
var question = url.indexOf(&quot;?&quot;);
if(question != -1)
url = url.substr(0,question);
var point = url.lastIndexOf(&quot;.&quot;);
if(point == -1)
return &quot;&quot;;
return url.substr(point+1).toLowerCase();
}
//this file allows to render the canvas using WebGL instead of Canvas2D
//this is useful if you plant to render 3D objects inside your nodes
LGraphCanvas.prototype.enableWebGL = function()
{
if(typeof(GL) === undefined)
throw(&quot;litegl.js must be included to use a WebGL canvas&quot;);
if(typeof(enableWebGLCanvas) === undefined)
throw(&quot;webglCanvas.js must be included to use this feature&quot;);
this.gl = this.ctx = enableWebGLCanvas(this.canvas);
this.ctx.webgl = true;
this.bgcanvas = this.canvas;
this.bgctx = this.gl;
/*
GL.create({ canvas: this.bgcanvas });
this.bgctx = enableWebGLCanvas( this.bgcanvas );
window.gl = this.gl;
*/
}
/*
LGraphCanvas.prototype.UIinit = function()
{
var that = this;
$(&quot;#node-console input&quot;).change(function(e)
{
if(e.target.value == &quot;&quot;)
return;
var node = that.node_in_panel;
if(!node)
return;
node.trace(&quot;] &quot; + e.target.value, &quot;#333&quot;);
if(node.onConsoleCommand)
{
if(!node.onConsoleCommand(e.target.value))
node.trace(&quot;command not found&quot;, &quot;#A33&quot;);
}
else if (e.target.value == &quot;info&quot;)
{
node.trace(&quot;Special methods:&quot;);
for(var i in node)
{
if(typeof(node[i]) == &quot;function&quot; &amp;&amp; LGraphNode.prototype[i] == null &amp;&amp; i.substr(0,2) != &quot;on&quot; &amp;&amp; i[0] != &quot;_&quot;)
node.trace(&quot; + &quot; + i);
}
}
else
{
try
{
eval(&quot;var _foo = function() { return (&quot;+e.target.value+&quot;); }&quot;);
var result = _foo.call(node);
if(result)
node.trace(result.toString());
delete window._foo;
}
catch(err)
{
node.trace(&quot;error: &quot; + err, &quot;#A33&quot;);
}
}
this.value = &quot;&quot;;
});
}
*/
/**
* marks as dirty the canvas, this way it will be rendered again
*
* @class LGraphCanvas
* @method setDirty
* @param {bool} fgcanvas if the foreground canvas is dirty (the one containing the nodes)
* @param {bool} bgcanvas if the background canvas is dirty (the one containing the wires)
*/
LGraphCanvas.prototype.setDirty = function(fgcanvas,bgcanvas)
{
if(fgcanvas)
this.dirty_canvas = true;
if(bgcanvas)
this.dirty_bgcanvas = true;
}
/**
* Used to attach the canvas in a popup
*
* @method getCanvasWindow
* @return {window} returns the window where the canvas is attached (the DOM root node)
*/
LGraphCanvas.prototype.getCanvasWindow = function()
{
var doc = this.canvas.ownerDocument;
return doc.defaultView || doc.parentWindow;
}
/**
* starts rendering the content of the canvas when needed
*
* @method startRendering
*/
LGraphCanvas.prototype.startRendering = function()
{
if(this.is_rendering) return; //already rendering
this.is_rendering = true;
renderFrame.call(this);
function renderFrame()
{
if(!this.pause_rendering)
this.draw();
var window = this.getCanvasWindow();
if(this.is_rendering)
window.requestAnimationFrame( renderFrame.bind(this) );
}
}
/**
* stops rendering the content of the canvas (to save resources)
*
* @method stopRendering
*/
LGraphCanvas.prototype.stopRendering = function()
{
this.is_rendering = false;
/*
if(this.rendering_timer_id)
{
clearInterval(this.rendering_timer_id);
this.rendering_timer_id = null;
}
*/
}
/* LiteGraphCanvas input */
LGraphCanvas.prototype.processMouseDown = function(e)
{
if(!this.graph)
return;
this.adjustMouseEvent(e);
var ref_window = this.getCanvasWindow();
var document = ref_window.document;
//move mouse move event to the window in case it drags outside of the canvas
this.canvas.removeEventListener(&quot;mousemove&quot;, this._mousemove_callback );
ref_window.document.addEventListener(&quot;mousemove&quot;, this._mousemove_callback, true ); //catch for the entire window
ref_window.document.addEventListener(&quot;mouseup&quot;, this._mouseup_callback, true );
var n = this.graph.getNodeOnPos(e.canvasX, e.canvasY, this.visible_nodes);
var skip_dragging = false;
if(e.which == 1) //left button mouse
{
//another node selected
if(!e.shiftKey) //REFACTOR: integrate with function
{
var todeselect = [];
for(var i in this.selected_nodes)
if (this.selected_nodes[i] != n)
todeselect.push(this.selected_nodes[i]);
//two passes to avoid problems modifying the container
for(var i in todeselect)
this.processNodeDeselected(todeselect[i]);
}
var clicking_canvas_bg = false;
//when clicked on top of a node
//and it is not interactive
if(n)
{
if(!this.live_mode &amp;&amp; !n.flags.pinned)
this.bringToFront(n); //if it wasnt selected?
var skip_action = false;
//not dragging mouse to connect two slots
if(!this.connecting_node &amp;&amp; !n.flags.collapsed &amp;&amp; !this.live_mode)
{
//search for outputs
if(n.outputs)
for(var i = 0, l = n.outputs.length; i &lt; l; ++i)
{
var output = n.outputs[i];
var link_pos = n.getConnectionPos(false,i);
if( isInsideRectangle(e.canvasX, e.canvasY, link_pos[0] - 10, link_pos[1] - 5, 20,10) )
{
this.connecting_node = n;
this.connecting_output = output;
this.connecting_pos = n.getConnectionPos(false,i);
this.connecting_slot = i;
skip_action = true;
break;
}
}
//search for inputs
if(n.inputs)
for(var i = 0, l = n.inputs.length; i &lt; l; ++i)
{
var input = n.inputs[i];
var link_pos = n.getConnectionPos(true,i);
if( isInsideRectangle(e.canvasX, e.canvasY, link_pos[0] - 10, link_pos[1] - 5, 20,10) )
{
if(input.link !== null)
{
n.disconnectInput(i);
this.dirty_bgcanvas = true;
skip_action = true;
}
}
}
//Search for corner
if( !skip_action &amp;&amp; isInsideRectangle(e.canvasX, e.canvasY, n.pos[0] + n.size[0] - 5, n.pos[1] + n.size[1] - 5 ,5,5 ))
{
this.resizing_node = n;
this.canvas.style.cursor = &quot;se-resize&quot;;
skip_action = true;
}
}
//Search for corner
if( !skip_action &amp;&amp; isInsideRectangle(e.canvasX, e.canvasY, n.pos[0], n.pos[1] - LiteGraph.NODE_TITLE_HEIGHT ,LiteGraph.NODE_TITLE_HEIGHT, LiteGraph.NODE_TITLE_HEIGHT ))
{
n.collapse();
skip_action = true;
}
//it wasnt clicked on the links boxes
if(!skip_action)
{
var block_drag_node = false;
//double clicking
var now = LiteGraph.getTime();
if ((now - this.last_mouseclick) &lt; 300 &amp;&amp; this.selected_nodes[n.id])
{
//double click node
if( n.onDblClick)
n.onDblClick(e);
this.processNodeDblClicked(n);
block_drag_node = true;
}
//if do not capture mouse
if( n.onMouseDown &amp;&amp; n.onMouseDown(e) )
block_drag_node = true;
else if(this.live_mode)
{
clicking_canvas_bg = true;
block_drag_node = true;
}
if(!block_drag_node)
{
if(this.allow_dragnodes)
this.node_dragged = n;
if(!this.selected_nodes[n.id])
this.processNodeSelected(n,e);
}
this.dirty_canvas = true;
}
}
else
clicking_canvas_bg = true;
if(clicking_canvas_bg &amp;&amp; this.allow_dragcanvas)
{
this.dragging_canvas = true;
}
}
else if (e.which == 2) //middle button
{
}
else if (e.which == 3) //right button
{
this.processContextualMenu(n,e);
}
//TODO
//if(this.node_selected != prev_selected)
// this.onNodeSelectionChange(this.node_selected);
this.last_mouse[0] = e.localX;
this.last_mouse[1] = e.localY;
this.last_mouseclick = LiteGraph.getTime();
this.canvas_mouse = [e.canvasX, e.canvasY];
/*
if( (this.dirty_canvas || this.dirty_bgcanvas) &amp;&amp; this.rendering_timer_id == null)
this.draw();
*/
this.graph.change();
//this is to ensure to defocus(blur) if a text input element is on focus
if(!ref_window.document.activeElement || (ref_window.document.activeElement.nodeName.toLowerCase() != &quot;input&quot; &amp;&amp; ref_window.document.activeElement.nodeName.toLowerCase() != &quot;textarea&quot;))
e.preventDefault();
e.stopPropagation();
return false;
}
LGraphCanvas.prototype.processMouseMove = function(e)
{
if(!this.graph) return;
this.adjustMouseEvent(e);
var mouse = [e.localX, e.localY];
var delta = [mouse[0] - this.last_mouse[0], mouse[1] - this.last_mouse[1]];
this.last_mouse = mouse;
this.canvas_mouse = [e.canvasX, e.canvasY];
if(this.dragging_canvas)
{
this.offset[0] += delta[0] / this.scale;
this.offset[1] += delta[1] / this.scale;
this.dirty_canvas = true;
this.dirty_bgcanvas = true;
}
else
{
if(this.connecting_node)
this.dirty_canvas = true;
//get node over
var n = this.graph.getNodeOnPos(e.canvasX, e.canvasY, this.visible_nodes);
//remove mouseover flag
for(var i in this.graph._nodes)
{
if(this.graph._nodes[i].mouseOver &amp;&amp; n != this.graph._nodes[i])
{
//mouse leave
this.graph._nodes[i].mouseOver = false;
if(this.node_over &amp;&amp; this.node_over.onMouseLeave)
this.node_over.onMouseLeave(e);
this.node_over = null;
this.dirty_canvas = true;
}
}
//mouse over a node
if(n)
{
//this.canvas.style.cursor = &quot;move&quot;;
if(!n.mouseOver)
{
//mouse enter
n.mouseOver = true;
this.node_over = n;
this.dirty_canvas = true;
if(n.onMouseEnter) n.onMouseEnter(e);
}
if(n.onMouseMove) n.onMouseMove(e);
//ontop of input
if(this.connecting_node)
{
var pos = this._highlight_input || [0,0];
var slot = this.isOverNodeInput(n, e.canvasX, e.canvasY, pos);
if(slot != -1 &amp;&amp; n.inputs[slot])
{
var slot_type = n.inputs[slot].type;
if( !this.connecting_output.type || !slot_type || slot_type.toLowerCase() == this.connecting_output.type.toLowerCase() )
this._highlight_input = pos;
}
else
this._highlight_input = null;
}
//Search for corner
if( isInsideRectangle(e.canvasX, e.canvasY, n.pos[0] + n.size[0] - 5, n.pos[1] + n.size[1] - 5 ,5,5 ))
this.canvas.style.cursor = &quot;se-resize&quot;;
else
this.canvas.style.cursor = null;
}
else
this.canvas.style.cursor = null;
if(this.node_capturing_input &amp;&amp; this.node_capturing_input != n &amp;&amp; this.node_capturing_input.onMouseMove)
{
this.node_capturing_input.onMouseMove(e);
}
if(this.node_dragged &amp;&amp; !this.live_mode)
{
/*
this.node_dragged.pos[0] += delta[0] / this.scale;
this.node_dragged.pos[1] += delta[1] / this.scale;
this.node_dragged.pos[0] = Math.round(this.node_dragged.pos[0]);
this.node_dragged.pos[1] = Math.round(this.node_dragged.pos[1]);
*/
for(var i in this.selected_nodes)
{
var n = this.selected_nodes[i];
n.pos[0] += delta[0] / this.scale;
n.pos[1] += delta[1] / this.scale;
//n.pos[0] = Math.round(n.pos[0]);
//n.pos[1] = Math.round(n.pos[1]);
}
this.dirty_canvas = true;
this.dirty_bgcanvas = true;
}
if(this.resizing_node &amp;&amp; !this.live_mode)
{
this.resizing_node.size[0] += delta[0] / this.scale;
this.resizing_node.size[1] += delta[1] / this.scale;
var max_slots = Math.max( this.resizing_node.inputs ? this.resizing_node.inputs.length : 0, this.resizing_node.outputs ? this.resizing_node.outputs.length : 0);
if(this.resizing_node.size[1] &lt; max_slots * LiteGraph.NODE_SLOT_HEIGHT + 4)
this.resizing_node.size[1] = max_slots * LiteGraph.NODE_SLOT_HEIGHT + 4;
if(this.resizing_node.size[0] &lt; LiteGraph.NODE_MIN_WIDTH)
this.resizing_node.size[0] = LiteGraph.NODE_MIN_WIDTH;
this.canvas.style.cursor = &quot;se-resize&quot;;
this.dirty_canvas = true;
this.dirty_bgcanvas = true;
}
}
/*
if((this.dirty_canvas || this.dirty_bgcanvas) &amp;&amp; this.rendering_timer_id == null)
this.draw();
*/
e.preventDefault();
//e.stopPropagation();
return false;
//this is not really optimal
//this.graph.change();
}
LGraphCanvas.prototype.processMouseUp = function(e)
{
if(!this.graph)
return;
var window = this.getCanvasWindow();
var document = window.document;
//restore the mousemove event back to the canvas
document.removeEventListener(&quot;mousemove&quot;, this._mousemove_callback, true );
this.canvas.addEventListener(&quot;mousemove&quot;, this._mousemove_callback, true);
document.removeEventListener(&quot;mouseup&quot;, this._mouseup_callback, true );
this.adjustMouseEvent(e);
if (e.which == 1) //left button
{
//dragging a connection
if(this.connecting_node)
{
this.dirty_canvas = true;
this.dirty_bgcanvas = true;
var node = this.graph.getNodeOnPos(e.canvasX, e.canvasY, this.visible_nodes);
//node below mouse
if(node)
{
if(this.connecting_output.type == &#x27;node&#x27;)
{
this.connecting_node.connect(this.connecting_slot, node, -1);
}
else
{
//slot below mouse? connect
var slot = this.isOverNodeInput(node, e.canvasX, e.canvasY);
if(slot != -1)
{
this.connecting_node.connect(this.connecting_slot, node, slot);
}
else
{ //not on top of an input
var input = node.getInputInfo(0);
//simple connect
if(input &amp;&amp; !input.link &amp;&amp; input.type == this.connecting_output.type) //toLowerCase missing
this.connecting_node.connect(this.connecting_slot, node, 0);
}
}
}
this.connecting_output = null;
this.connecting_pos = null;
this.connecting_node = null;
this.connecting_slot = -1;
}//not dragging connection
else if(this.resizing_node)
{
this.dirty_canvas = true;
this.dirty_bgcanvas = true;
this.resizing_node = null;
}
else if(this.node_dragged) //node being dragged?
{
this.dirty_canvas = true;
this.dirty_bgcanvas = true;
this.node_dragged.pos[0] = Math.round(this.node_dragged.pos[0]);
this.node_dragged.pos[1] = Math.round(this.node_dragged.pos[1]);
if(this.graph.config.align_to_grid)
this.node_dragged.alignToGrid();
this.node_dragged = null;
}
else //no node being dragged
{
this.dirty_canvas = true;
this.dragging_canvas = false;
if( this.node_over &amp;&amp; this.node_over.onMouseUp )
this.node_over.onMouseUp(e);
if( this.node_capturing_input &amp;&amp; this.node_capturing_input.onMouseUp )
this.node_capturing_input.onMouseUp(e);
}
}
else if (e.which == 2) //middle button
{
//trace(&quot;middle&quot;);
this.dirty_canvas = true;
this.dragging_canvas = false;
}
else if (e.which == 3) //right button
{
//trace(&quot;right&quot;);
this.dirty_canvas = true;
this.dragging_canvas = false;
}
/*
if((this.dirty_canvas || this.dirty_bgcanvas) &amp;&amp; this.rendering_timer_id == null)
this.draw();
*/
this.graph.change();
e.stopPropagation();
e.preventDefault();
return false;
}
LGraphCanvas.prototype.processMouseWheel = function(e)
{
if(!this.graph || !this.allow_dragcanvas)
return;
var delta = (e.wheelDeltaY != null ? e.wheelDeltaY : e.detail * -60);
this.adjustMouseEvent(e);
var zoom = this.scale;
if (delta &gt; 0)
zoom *= 1.1;
else if (delta &lt; 0)
zoom *= 1/(1.1);
this.setZoom( zoom, [ e.localX, e.localY ] );
/*
if(this.rendering_timer_id == null)
this.draw();
*/
this.graph.change();
e.preventDefault();
return false; // prevent default
}
LGraphCanvas.prototype.isOverNodeInput = function(node, canvasx, canvasy, slot_pos)
{
if(node.inputs)
for(var i = 0, l = node.inputs.length; i &lt; l; ++i)
{
var input = node.inputs[i];
var link_pos = node.getConnectionPos(true,i);
if( isInsideRectangle(canvasx, canvasy, link_pos[0] - 10, link_pos[1] - 5, 20,10) )
{
if(slot_pos) { slot_pos[0] = link_pos[0]; slot_pos[1] = link_pos[1] };
return i;
}
}
return -1;
}
LGraphCanvas.prototype.processKey = function(e)
{
if(!this.graph)
return;
var block_default = false;
if(e.type == &quot;keydown&quot;)
{
//select all Control A
if(e.keyCode == 65 &amp;&amp; e.ctrlKey)
{
this.selectAllNodes();
block_default = true;
}
//delete or backspace
if(e.keyCode == 46 || e.keyCode == 8)
{
this.deleteSelectedNodes();
block_default = true;
}
//collapse
//...
//TODO
if(this.selected_nodes)
for (var i in this.selected_nodes)
if(this.selected_nodes[i].onKeyDown)
this.selected_nodes[i].onKeyDown(e);
}
else if( e.type == &quot;keyup&quot; )
{
if(this.selected_nodes)
for (var i in this.selected_nodes)
if(this.selected_nodes[i].onKeyUp)
this.selected_nodes[i].onKeyUp(e);
}
this.graph.change();
if(block_default)
{
e.preventDefault();
return false;
}
}
LGraphCanvas.prototype.processDrop = function(e)
{
e.preventDefault();
this.adjustMouseEvent(e);
var pos = [e.canvasX,e.canvasY];
var node = this.graph.getNodeOnPos(pos[0],pos[1]);
if(!node)
return;
if(!node.onDropFile)
return;
var file = e.dataTransfer.files[0];
var filename = file.name;
var ext = LGraphCanvas.getFileExtension( filename );
//console.log(file);
//prepare reader
var reader = new FileReader();
reader.onload = function (event) {
//console.log(event.target);
var data = event.target.result;
node.onDropFile( data, filename, file );
};
//read data
var type = file.type.split(&quot;/&quot;)[0];
if(type == &quot;text&quot; || type == &quot;&quot;)
reader.readAsText(file);
else if (type == &quot;image&quot;)
reader.readAsDataURL(file);
else
reader.readAsArrayBuffer(file);
return false;
}
LGraphCanvas.prototype.processNodeSelected = function(n,e)
{
n.selected = true;
if (n.onSelected)
n.onSelected();
if(e &amp;&amp; e.shiftKey) //add to selection
this.selected_nodes[n.id] = n;
else
{
this.selected_nodes = {};
this.selected_nodes[ n.id ] = n;
}
this.dirty_canvas = true;
if(this.onNodeSelected)
this.onNodeSelected(n);
//if(this.node_in_panel) this.showNodePanel(n);
}
LGraphCanvas.prototype.processNodeDeselected = function(n)
{
n.selected = false;
if(n.onDeselected)
n.onDeselected();
delete this.selected_nodes[n.id];
if(this.onNodeDeselected)
this.onNodeDeselected();
this.dirty_canvas = true;
//this.showNodePanel(null);
}
LGraphCanvas.prototype.processNodeDblClicked = function(n)
{
if(this.onShowNodePanel)
this.onShowNodePanel(n);
if(this.onNodeDblClicked)
this.onNodeDblClicked(n);
this.setDirty(true);
}
LGraphCanvas.prototype.selectNode = function(node)
{
this.deselectAllNodes();
if(!node)
return;
if(!node.selected &amp;&amp; node.onSelected)
node.onSelected();
node.selected = true;
this.selected_nodes[ node.id ] = node;
this.setDirty(true);
}
LGraphCanvas.prototype.selectAllNodes = function()
{
for(var i in this.graph._nodes)
{
var n = this.graph._nodes[i];
if(!n.selected &amp;&amp; n.onSelected)
n.onSelected();
n.selected = true;
this.selected_nodes[this.graph._nodes[i].id] = n;
}
this.setDirty(true);
}
LGraphCanvas.prototype.deselectAllNodes = function()
{
for(var i in this.selected_nodes)
{
var n = this.selected_nodes;
if(n.onDeselected)
n.onDeselected();
n.selected = false;
}
this.selected_nodes = {};
this.setDirty(true);
}
LGraphCanvas.prototype.deleteSelectedNodes = function()
{
for(var i in this.selected_nodes)
{
var m = this.selected_nodes[i];
//if(m == this.node_in_panel) this.showNodePanel(null);
this.graph.remove(m);
}
this.selected_nodes = {};
this.setDirty(true);
}
LGraphCanvas.prototype.centerOnNode = function(node)
{
this.offset[0] = -node.pos[0] - node.size[0] * 0.5 + (this.canvas.width * 0.5 / this.scale);
this.offset[1] = -node.pos[1] - node.size[1] * 0.5 + (this.canvas.height * 0.5 / this.scale);
this.setDirty(true,true);
}
LGraphCanvas.prototype.adjustMouseEvent = function(e)
{
var b = this.canvas.getBoundingClientRect();
e.localX = e.pageX - b.left;
e.localY = e.pageY - b.top;
e.canvasX = e.localX / this.scale - this.offset[0];
e.canvasY = e.localY / this.scale - this.offset[1];
}
LGraphCanvas.prototype.setZoom = function(value, zooming_center)
{
if(!zooming_center)
zooming_center = [this.canvas.width * 0.5,this.canvas.height * 0.5];
var center = this.convertOffsetToCanvas( zooming_center );
this.scale = value;
if(this.scale &gt; this.max_zoom)
this.scale = this.max_zoom;
else if(this.scale &lt; this.min_zoom)
this.scale = this.min_zoom;
var new_center = this.convertOffsetToCanvas( zooming_center );
var delta_offset = [new_center[0] - center[0], new_center[1] - center[1]];
this.offset[0] += delta_offset[0];
this.offset[1] += delta_offset[1];
this.dirty_canvas = true;
this.dirty_bgcanvas = true;
}
LGraphCanvas.prototype.convertOffsetToCanvas = function(pos)
{
return [pos[0] / this.scale - this.offset[0], pos[1] / this.scale - this.offset[1]];
}
LGraphCanvas.prototype.convertCanvasToOffset = function(pos)
{
return [(pos[0] + this.offset[0]) * this.scale,
(pos[1] + this.offset[1]) * this.scale ];
}
LGraphCanvas.prototype.convertEventToCanvas = function(e)
{
var rect = this.canvas.getClientRects()[0];
return this.convertOffsetToCanvas([e.pageX - rect.left,e.pageY - rect.top]);
}
LGraphCanvas.prototype.bringToFront = function(n)
{
var i = this.graph._nodes.indexOf(n);
if(i == -1) return;
this.graph._nodes.splice(i,1);
this.graph._nodes.push(n);
}
LGraphCanvas.prototype.sendToBack = function(n)
{
var i = this.graph._nodes.indexOf(n);
if(i == -1) return;
this.graph._nodes.splice(i,1);
this.graph._nodes.unshift(n);
}
/* Interaction */
/* LGraphCanvas render */
LGraphCanvas.prototype.computeVisibleNodes = function()
{
var visible_nodes = [];
for (var i in this.graph._nodes)
{
var n = this.graph._nodes[i];
//skip rendering nodes in live mode
if(this.live_mode &amp;&amp; !n.onDrawBackground &amp;&amp; !n.onDrawForeground)
continue;
if(!overlapBounding(this.visible_area, n.getBounding() ))
continue; //out of the visible area
visible_nodes.push(n);
}
return visible_nodes;
}
LGraphCanvas.prototype.draw = function(force_canvas, force_bgcanvas)
{
//fps counting
var now = LiteGraph.getTime();
this.render_time = (now - this.last_draw_time)*0.001;
this.last_draw_time = now;
if(this.graph)
{
var start = [-this.offset[0], -this.offset[1] ];
var end = [start[0] + this.canvas.width / this.scale, start[1] + this.canvas.height / this.scale];
this.visible_area = new Float32Array([start[0],start[1],end[0],end[1]]);
}
if(this.dirty_bgcanvas || force_bgcanvas)
this.drawBackCanvas();
if(this.dirty_canvas || force_canvas)
this.drawFrontCanvas();
this.fps = this.render_time ? (1.0 / this.render_time) : 0;
this.frame += 1;
}
LGraphCanvas.prototype.drawFrontCanvas = function()
{
if(!this.ctx)
this.ctx = this.bgcanvas.getContext(&quot;2d&quot;);
var ctx = this.ctx;
if(!ctx) //maybe is using webgl...
return;
if(ctx.start2D)
ctx.start2D();
var canvas = this.canvas;
//reset in case of error
ctx.restore();
ctx.setTransform(1, 0, 0, 1, 0, 0);
//clip dirty area if there is one, otherwise work in full canvas
if(this.dirty_area)
{
ctx.save();
ctx.beginPath();
ctx.rect(this.dirty_area[0],this.dirty_area[1],this.dirty_area[2],this.dirty_area[3]);
ctx.clip();
}
//clear
//canvas.width = canvas.width;
if(this.clear_background)
ctx.clearRect(0,0,canvas.width, canvas.height);
//draw bg canvas
if(this.bgcanvas == this.canvas)
this.drawBackCanvas();
else
ctx.drawImage(this.bgcanvas,0,0);
//rendering
if(this.onRender)
this.onRender(canvas, ctx);
//info widget
if(this.show_info)
this.renderInfo(ctx);
if(this.graph)
{
//apply transformations
ctx.save();
ctx.scale(this.scale,this.scale);
ctx.translate(this.offset[0],this.offset[1]);
//draw nodes
var drawn_nodes = 0;
var visible_nodes = this.computeVisibleNodes();
this.visible_nodes = visible_nodes;
for (var i in visible_nodes)
{
var node = visible_nodes[i];
//transform coords system
ctx.save();
ctx.translate( node.pos[0], node.pos[1] );
//Draw
this.drawNode(node, ctx );
drawn_nodes += 1;
//Restore
ctx.restore();
}
//connections ontop?
if(this.graph.config.links_ontop)
if(!this.live_mode)
this.drawConnections(ctx);
//current connection
if(this.connecting_pos != null)
{
ctx.lineWidth = this.connections_width;
var link_color = this.connecting_output.type == &#x27;node&#x27; ? &quot;#F85&quot; : &quot;#AFA&quot;;
this.renderLink(ctx, this.connecting_pos, [this.canvas_mouse[0],this.canvas_mouse[1]], link_color );
ctx.beginPath();
ctx.arc( this.connecting_pos[0], this.connecting_pos[1],4,0,Math.PI*2);
/*
if( this.connecting_output.round)
ctx.arc( this.connecting_pos[0], this.connecting_pos[1],4,0,Math.PI*2);
else
ctx.rect( this.connecting_pos[0], this.connecting_pos[1],12,6);
*/
ctx.fill();
ctx.fillStyle = &quot;#ffcc00&quot;;
if(this._highlight_input)
{
ctx.beginPath();
ctx.arc( this._highlight_input[0], this._highlight_input[1],6,0,Math.PI*2);
ctx.fill();
}
}
ctx.restore();
}
if(this.dirty_area)
{
ctx.restore();
//this.dirty_area = null;
}
if(ctx.finish2D) //this is a function I use in webgl renderer
ctx.finish2D();
this.dirty_canvas = false;
}
LGraphCanvas.prototype.renderInfo = function( ctx, x, y )
{
x = x || 0;
y = y || 0;
ctx.save();
ctx.translate( x, y );
ctx.font = &quot;10px Arial&quot;;
ctx.fillStyle = &quot;#888&quot;;
if(this.graph)
{
ctx.fillText( &quot;T: &quot; + this.graph.globaltime.toFixed(2)+&quot;s&quot;,5,13*1 );
ctx.fillText( &quot;I: &quot; + this.graph.iteration,5,13*2 );
ctx.fillText( &quot;F: &quot; + this.frame,5,13*3 );
ctx.fillText( &quot;FPS:&quot; + this.fps.toFixed(2),5,13*4 );
}
else
ctx.fillText( &quot;No graph selected&quot;,5,13*1 );
ctx.restore();
}
LGraphCanvas.prototype.drawBackCanvas = function()
{
var canvas = this.bgcanvas;
if(!this.bgctx)
this.bgctx = this.bgcanvas.getContext(&quot;2d&quot;);
var ctx = this.bgctx;
if(ctx.start)
ctx.start();
//clear
if(this.clear_background)
ctx.clearRect(0,0,canvas.width, canvas.height);
//reset in case of error
ctx.restore();
ctx.setTransform(1, 0, 0, 1, 0, 0);
if(this.graph)
{
//apply transformations
ctx.save();
ctx.scale(this.scale,this.scale);
ctx.translate(this.offset[0],this.offset[1]);
//render BG
if(this.background_image &amp;&amp; this.scale &gt; 0.5)
{
ctx.globalAlpha = (1.0 - 0.5 / this.scale) * this.editor_alpha;
ctx.webkitImageSmoothingEnabled = ctx.mozImageSmoothingEnabled = ctx.imageSmoothingEnabled = false;
if(!this._bg_img || this._bg_img.name != this.background_image)
{
this._bg_img = new Image();
this._bg_img.name = this.background_image;
this._bg_img.src = this.background_image;
var that = this;
this._bg_img.onload = function() {
that.draw(true,true);
}
}
var pattern = null;
if(this._bg_img != this._pattern_img &amp;&amp; this._bg_img.width &gt; 0)
{
pattern = ctx.createPattern( this._bg_img, &#x27;repeat&#x27; );
this._pattern_img = this._bg_img;
this._pattern = pattern;
}
else
pattern = this._pattern;
if(pattern)
{
ctx.fillStyle = pattern;
ctx.fillRect(this.visible_area[0],this.visible_area[1],this.visible_area[2]-this.visible_area[0],this.visible_area[3]-this.visible_area[1]);
ctx.fillStyle = &quot;transparent&quot;;
}
ctx.globalAlpha = 1.0;
ctx.webkitImageSmoothingEnabled = ctx.mozImageSmoothingEnabled = ctx.imageSmoothingEnabled = true;
}
if(this.onBackgroundRender)
this.onBackgroundRender(canvas, ctx);
//DEBUG: show clipping area
//ctx.fillStyle = &quot;red&quot;;
//ctx.fillRect( this.visible_area[0] + 10, this.visible_area[1] + 10, this.visible_area[2] - this.visible_area[0] - 20, this.visible_area[3] - this.visible_area[1] - 20);
//bg
ctx.strokeStyle = &quot;#235&quot;;
ctx.strokeRect(0,0,canvas.width,canvas.height);
if(this.render_connections_shadows)
{
ctx.shadowColor = &quot;#000&quot;;
ctx.shadowOffsetX = 0;
ctx.shadowOffsetY = 0;
ctx.shadowBlur = 6;
}
else
ctx.shadowColor = &quot;rgba(0,0,0,0)&quot;;
//draw connections
if(!this.live_mode)
this.drawConnections(ctx);
ctx.shadowColor = &quot;rgba(0,0,0,0)&quot;;
//restore state
ctx.restore();
}
if(ctx.finish)
ctx.finish();
this.dirty_bgcanvas = false;
this.dirty_canvas = true; //to force to repaint the front canvas with the bgcanvas
}
/* Renders the LGraphNode on the canvas */
LGraphCanvas.prototype.drawNode = function(node, ctx )
{
var glow = false;
var color = node.color || LiteGraph.NODE_DEFAULT_COLOR;
//if (this.selected) color = &quot;#88F&quot;;
var render_title = true;
if(node.flags.skip_title_render || node.graph.isLive())
render_title = false;
if(node.mouseOver)
render_title = true;
//shadow and glow
if (node.mouseOver) glow = true;
if(node.selected)
{
/*
ctx.shadowColor = &quot;#EEEEFF&quot;;//glow ? &quot;#AAF&quot; : &quot;#000&quot;;
ctx.shadowOffsetX = 0;
ctx.shadowOffsetY = 0;
ctx.shadowBlur = 1;
*/
}
else if(this.render_shadows)
{
ctx.shadowColor = &quot;rgba(0,0,0,0.5)&quot;;
ctx.shadowOffsetX = 2;
ctx.shadowOffsetY = 2;
ctx.shadowBlur = 3;
}
else
ctx.shadowColor = &quot;transparent&quot;;
//only render if it forces it to do it
if(this.live_mode)
{
if(!node.flags.collapsed)
{
ctx.shadowColor = &quot;transparent&quot;;
//if(node.onDrawBackground)
// node.onDrawBackground(ctx);
if(node.onDrawForeground)
node.onDrawForeground(ctx);
}
return;
}
//draw in collapsed form
/*
if(node.flags.collapsed)
{
if(!node.onDrawCollapsed || node.onDrawCollapsed(ctx) == false)
this.drawNodeCollapsed(node, ctx, color, node.bgcolor);
return;
}
*/
var editor_alpha = this.editor_alpha;
ctx.globalAlpha = editor_alpha;
//clip if required (mask)
var shape = node.shape || &quot;box&quot;;
var size = new Float32Array(node.size);
if(node.flags.collapsed)
{
size[0] = LiteGraph.NODE_COLLAPSED_WIDTH;
size[1] = 0;
}
//Start clipping
if(node.flags.clip_area)
{
ctx.save();
if(shape == &quot;box&quot;)
{
ctx.beginPath();
ctx.rect(0,0,size[0], size[1]);
}
else if (shape == &quot;round&quot;)
{
ctx.roundRect(0,0,size[0], size[1],10);
}
else if (shape == &quot;circle&quot;)
{
ctx.beginPath();
ctx.arc(size[0] * 0.5, size[1] * 0.5, size[0] * 0.5, 0, Math.PI*2);
}
ctx.clip();
}
//draw shape
this.drawNodeShape(node, ctx, size, color, node.bgcolor, !render_title, node.selected );
ctx.shadowColor = &quot;transparent&quot;;
//connection slots
ctx.textAlign = &quot;left&quot;;
ctx.font = this.inner_text_font;
var render_text = this.scale &gt; 0.6;
//render inputs and outputs
if(!node.flags.collapsed)
{
//input connection slots
if(node.inputs)
for(var i = 0; i &lt; node.inputs.length; i++)
{
var slot = node.inputs[i];
ctx.globalAlpha = editor_alpha;
if (this.connecting_node != null &amp;&amp; this.connecting_output.type &amp;&amp; node.inputs[i].type &amp;&amp; this.connecting_output.type.toLowerCase() != node.inputs[i].type.toLowerCase() )
ctx.globalAlpha = 0.4 * editor_alpha;
ctx.fillStyle = slot.link != null ? &quot;#7F7&quot; : &quot;#AAA&quot;;
var pos = node.getConnectionPos(true,i);
pos[0] -= node.pos[0];
pos[1] -= node.pos[1];
ctx.beginPath();
if (1 || slot.round)
ctx.arc(pos[0],pos[1],4,0,Math.PI*2);
//else
// ctx.rect((pos[0] - 6) + 0.5, (pos[1] - 5) + 0.5,14,10);
ctx.fill();
//render name
if(render_text)
{
var text = slot.label != null ? slot.label : slot.name;
if(text)
{
ctx.fillStyle = color;
ctx.fillText(text,pos[0] + 10,pos[1] + 5);
}
}
}
//output connection slots
if(this.connecting_node)
ctx.globalAlpha = 0.4 * editor_alpha;
ctx.lineWidth = 1;
ctx.textAlign = &quot;right&quot;;
ctx.strokeStyle = &quot;black&quot;;
if(node.outputs)
for(var i = 0; i &lt; node.outputs.length; i++)
{
var slot = node.outputs[i];
var pos = node.getConnectionPos(false,i);
pos[0] -= node.pos[0];
pos[1] -= node.pos[1];
ctx.fillStyle = slot.links &amp;&amp; slot.links.length ? &quot;#7F7&quot; : &quot;#AAA&quot;;
ctx.beginPath();
//ctx.rect( node.size[0] - 14,i*14,10,10);
if (1 || slot.round)
ctx.arc(pos[0],pos[1],4,0,Math.PI*2);
//else
// ctx.rect((pos[0] - 6) + 0.5,(pos[1] - 5) + 0.5,14,10);
//trigger
//if(slot.node_id != null &amp;&amp; slot.slot == -1)
// ctx.fillStyle = &quot;#F85&quot;;
//if(slot.links != null &amp;&amp; slot.links.length)
ctx.fill();
ctx.stroke();
//render output name
if(render_text)
{
var text = slot.label != null ? slot.label : slot.name;
if(text)
{
ctx.fillStyle = color;
ctx.fillText(text, pos[0] - 10,pos[1] + 5);
}
}
}
ctx.textAlign = &quot;left&quot;;
ctx.globalAlpha = 1;
if(node.onDrawForeground)
node.onDrawForeground(ctx);
}//!collapsed
if(node.flags.clip_area)
ctx.restore();
ctx.globalAlpha = 1.0;
}
/* Renders the node shape */
LGraphCanvas.prototype.drawNodeShape = function(node, ctx, size, fgcolor, bgcolor, no_title, selected )
{
//bg rect
ctx.strokeStyle = fgcolor || LiteGraph.NODE_DEFAULT_COLOR;
ctx.fillStyle = bgcolor || LiteGraph.NODE_DEFAULT_BGCOLOR;
/* gradient test
var grad = ctx.createLinearGradient(0,0,0,node.size[1]);
grad.addColorStop(0, &quot;#AAA&quot;);
grad.addColorStop(0.5, fgcolor || LiteGraph.NODE_DEFAULT_COLOR);
grad.addColorStop(1, bgcolor || LiteGraph.NODE_DEFAULT_BGCOLOR);
ctx.fillStyle = grad;
//*/
var title_height = LiteGraph.NODE_TITLE_HEIGHT;
//render depending on shape
var shape = node.shape || &quot;box&quot;;
if(shape == &quot;box&quot;)
{
ctx.beginPath();
ctx.rect(0,no_title ? 0 : -title_height, size[0]+1, no_title ? size[1] : size[1] + title_height);
ctx.fill();
ctx.shadowColor = &quot;transparent&quot;;
if(selected)
{
ctx.strokeStyle = &quot;#CCC&quot;;
ctx.strokeRect(-0.5,no_title ? -0.5 : -title_height + -0.5, size[0]+2, no_title ? (size[1]+2) : (size[1] + title_height+2) - 1);
ctx.strokeStyle = fgcolor;
}
}
else if (node.shape == &quot;round&quot;)
{
ctx.roundRect(0,no_title ? 0 : -title_height,size[0], no_title ? size[1] : size[1] + title_height, 10);
ctx.fill();
}
else if (node.shape == &quot;circle&quot;)
{
ctx.beginPath();
ctx.arc(size[0] * 0.5, size[1] * 0.5, size[0] * 0.5, 0, Math.PI*2);
ctx.fill();
}
ctx.shadowColor = &quot;transparent&quot;;
//ctx.stroke();
//image
if (node.bgImage &amp;&amp; node.bgImage.width)
ctx.drawImage( node.bgImage, (size[0] - node.bgImage.width) * 0.5 , (size[1] - node.bgImage.height) * 0.5);
if(node.bgImageUrl &amp;&amp; !node.bgImage)
node.bgImage = node.loadImage(node.bgImageUrl);
if(node.onDrawBackground)
node.onDrawBackground(ctx);
//title bg
if(!no_title)
{
ctx.fillStyle = fgcolor || LiteGraph.NODE_DEFAULT_COLOR;
var old_alpha = ctx.globalAlpha;
ctx.globalAlpha = 0.5 * old_alpha;
if(shape == &quot;box&quot;)
{
ctx.beginPath();
ctx.rect(0, -title_height, size[0]+1, title_height);
ctx.fill()
//ctx.stroke();
}
else if (shape == &quot;round&quot;)
{
ctx.roundRect(0,-title_height,size[0], title_height,10,0);
//ctx.fillRect(0,8,size[0],NODE_TITLE_HEIGHT - 12);
ctx.fill();
//ctx.stroke();
}
//box
ctx.fillStyle = node.boxcolor || LiteGraph.NODE_DEFAULT_BOXCOLOR;
ctx.beginPath();
if (shape == &quot;round&quot;)
ctx.arc(title_height *0.5, title_height * -0.5, (title_height - 6) *0.5,0,Math.PI*2);
else
ctx.rect(3,-title_height + 3,title_height - 6,title_height - 6);
ctx.fill();
ctx.globalAlpha = old_alpha;
//title text
ctx.font = this.title_text_font;
var title = node.getTitle();
if(title &amp;&amp; this.scale &gt; 0.5)
{
ctx.fillStyle = LiteGraph.NODE_TITLE_COLOR;
ctx.fillText( title, 16, 13 - title_height );
}
}
}
/* Renders the node when collapsed */
LGraphCanvas.prototype.drawNodeCollapsed = function(node, ctx, fgcolor, bgcolor)
{
//draw default collapsed shape
ctx.strokeStyle = fgcolor || LiteGraph.NODE_DEFAULT_COLOR;
ctx.fillStyle = bgcolor || LiteGraph.NODE_DEFAULT_BGCOLOR;
var collapsed_radius = LiteGraph.NODE_COLLAPSED_RADIUS;
//circle shape
var shape = node.shape || &quot;box&quot;;
if(shape == &quot;circle&quot;)
{
ctx.beginPath();
ctx.arc(node.size[0] * 0.5, node.size[1] * 0.5, collapsed_radius,0,Math.PI * 2);
ctx.fill();
ctx.shadowColor = &quot;rgba(0,0,0,0)&quot;;
ctx.stroke();
ctx.fillStyle = node.boxcolor || LiteGraph.NODE_DEFAULT_BOXCOLOR;
ctx.beginPath();
ctx.arc(node.size[0] * 0.5, node.size[1] * 0.5, collapsed_radius * 0.5,0,Math.PI * 2);
ctx.fill();
}
else if(shape == &quot;round&quot;) //rounded box
{
ctx.beginPath();
ctx.roundRect(node.size[0] * 0.5 - collapsed_radius, node.size[1] * 0.5 - collapsed_radius, 2*collapsed_radius,2*collapsed_radius,5);
ctx.fill();
ctx.shadowColor = &quot;rgba(0,0,0,0)&quot;;
ctx.stroke();
ctx.fillStyle = node.boxcolor || LiteGraph.NODE_DEFAULT_BOXCOLOR;
ctx.beginPath();
ctx.roundRect(node.size[0] * 0.5 - collapsed_radius*0.5, node.size[1] * 0.5 - collapsed_radius*0.5, collapsed_radius,collapsed_radius,2);
ctx.fill();
}
else //flat box
{
ctx.beginPath();
//ctx.rect(node.size[0] * 0.5 - collapsed_radius, node.size[1] * 0.5 - collapsed_radius, 2*collapsed_radius, 2*collapsed_radius);
ctx.rect(0, 0, node.size[0], collapsed_radius * 2 );
ctx.fill();
ctx.shadowColor = &quot;rgba(0,0,0,0)&quot;;
ctx.stroke();
ctx.fillStyle = node.boxcolor || LiteGraph.NODE_DEFAULT_BOXCOLOR;
ctx.beginPath();
//ctx.rect(node.size[0] * 0.5 - collapsed_radius*0.5, node.size[1] * 0.5 - collapsed_radius*0.5, collapsed_radius,collapsed_radius);
ctx.rect(collapsed_radius*0.5, collapsed_radius*0.5, collapsed_radius, collapsed_radius);
ctx.fill();
}
}
LGraphCanvas.link_colors = [&quot;#AAC&quot;,&quot;#ACA&quot;,&quot;#CAA&quot;];
LGraphCanvas.prototype.drawConnections = function(ctx)
{
//draw connections
ctx.lineWidth = this.connections_width;
ctx.fillStyle = &quot;#AAA&quot;;
ctx.strokeStyle = &quot;#AAA&quot;;
ctx.globalAlpha = this.editor_alpha;
//for every node
for (var n in this.graph._nodes)
{
var node = this.graph._nodes[n];
//for every input (we render just inputs because it is easier as every slot can only have one input)
if(node.inputs &amp;&amp; node.inputs.length)
for(var i in node.inputs)
{
var input = node.inputs[i];
if(!input || input.link == null)
continue;
var link_id = input.link;
var link = this.graph.links[ link_id ];
if(!link) continue;
var start_node = this.graph.getNodeById( link.origin_id );
if(start_node == null) continue;
var start_node_slot = link.origin_slot;
var start_node_slotpos = null;
if(start_node_slot == -1)
start_node_slotpos = [start_node.pos[0] + 10, start_node.pos[1] + 10];
else
start_node_slotpos = start_node.getConnectionPos(false, start_node_slot);
var color = LGraphCanvas.link_type_colors[node.inputs[i].type];
if(color == null)
color = LGraphCanvas.link_colors[node.id % LGraphCanvas.link_colors.length];
this.renderLink(ctx, start_node_slotpos, node.getConnectionPos(true,i), color );
}
}
ctx.globalAlpha = 1;
}
LGraphCanvas.prototype.renderLink = function(ctx,a,b,color)
{
if(!this.highquality_render)
{
ctx.beginPath();
ctx.moveTo(a[0],a[1]);
ctx.lineTo(b[0],b[1]);
ctx.stroke();
return;
}
var dist = distance(a,b);
if(this.render_connections_border &amp;&amp; this.scale &gt; 0.6)
ctx.lineWidth = this.connections_width + 4;
ctx.beginPath();
if(this.render_curved_connections) //splines
{
ctx.moveTo(a[0],a[1]);
ctx.bezierCurveTo(a[0] + dist*0.25, a[1],
b[0] - dist*0.25 , b[1],
b[0] ,b[1] );
}
else //lines
{
ctx.moveTo(a[0]+10,a[1]);
ctx.lineTo(((a[0]+10) + (b[0]-10))*0.5,a[1]);
ctx.lineTo(((a[0]+10) + (b[0]-10))*0.5,b[1]);
ctx.lineTo(b[0]-10,b[1]);
}
if(this.render_connections_border &amp;&amp; this.scale &gt; 0.6)
{
ctx.strokeStyle = &quot;rgba(0,0,0,0.5)&quot;;
ctx.stroke();
}
ctx.lineWidth = this.connections_width;
ctx.fillStyle = ctx.strokeStyle = color;
ctx.stroke();
//render arrow
if(this.render_connection_arrows &amp;&amp; this.scale &gt; 0.6)
{
//get two points in the bezier curve
var pos = this.computeConnectionPoint(a,b,0.5);
var pos2 = this.computeConnectionPoint(a,b,0.51);
var angle = 0;
if(this.render_curved_connections)
angle = -Math.atan2( pos2[0] - pos[0], pos2[1] - pos[1]);
else
angle = b[1] &gt; a[1] ? 0 : Math.PI;
ctx.save();
ctx.translate(pos[0],pos[1]);
ctx.rotate(angle);
ctx.beginPath();
ctx.moveTo(-5,-5);
ctx.lineTo(0,+5);
ctx.lineTo(+5,-5);
ctx.fill();
ctx.restore();
}
}
LGraphCanvas.prototype.computeConnectionPoint = function(a,b,t)
{
var dist = distance(a,b);
var p0 = a;
var p1 = [ a[0] + dist*0.25, a[1] ];
var p2 = [ b[0] - dist*0.25, b[1] ];
var p3 = b;
var c1 = (1-t)*(1-t)*(1-t);
var c2 = 3*((1-t)*(1-t))*t;
var c3 = 3*(1-t)*(t*t);
var c4 = t*t*t;
var x = c1*p0[0] + c2*p1[0] + c3*p2[0] + c4*p3[0];
var y = c1*p0[1] + c2*p1[1] + c3*p2[1] + c4*p3[1];
return [x,y];
}
/*
LGraphCanvas.prototype.resizeCanvas = function(width,height)
{
this.canvas.width = width;
if(height)
this.canvas.height = height;
this.bgcanvas.width = this.canvas.width;
this.bgcanvas.height = this.canvas.height;
this.draw(true,true);
}
*/
LGraphCanvas.prototype.resize = function(width, height)
{
if(!width &amp;&amp; !height)
{
var parent = this.canvas.parentNode;
width = parent.offsetWidth;
height = parent.offsetHeight;
}
if(this.canvas.width == width &amp;&amp; this.canvas.height == height)
return;
this.canvas.width = width;
this.canvas.height = height;
this.bgcanvas.width = this.canvas.width;
this.bgcanvas.height = this.canvas.height;
this.setDirty(true,true);
}
LGraphCanvas.prototype.switchLiveMode = function(transition)
{
if(!transition)
{
this.live_mode = !this.live_mode;
this.dirty_canvas = true;
this.dirty_bgcanvas = true;
return;
}
var self = this;
var delta = this.live_mode ? 1.1 : 0.9;
if(this.live_mode)
{
this.live_mode = false;
this.editor_alpha = 0.1;
}
var t = setInterval(function() {
self.editor_alpha *= delta;
self.dirty_canvas = true;
self.dirty_bgcanvas = true;
if(delta &lt; 1 &amp;&amp; self.editor_alpha &lt; 0.01)
{
clearInterval(t);
if(delta &lt; 1)
self.live_mode = true;
}
if(delta &gt; 1 &amp;&amp; self.editor_alpha &gt; 0.99)
{
clearInterval(t);
self.editor_alpha = 1;
}
},1);
}
LGraphCanvas.prototype.onNodeSelectionChange = function(node)
{
return; //disabled
//if(this.node_in_panel) this.showNodePanel(node);
}
LGraphCanvas.prototype.touchHandler = function(event)
{
//alert(&quot;foo&quot;);
var touches = event.changedTouches,
first = touches[0],
type = &quot;&quot;;
switch(event.type)
{
case &quot;touchstart&quot;: type = &quot;mousedown&quot;; break;
case &quot;touchmove&quot;: type=&quot;mousemove&quot;; break;
case &quot;touchend&quot;: type=&quot;mouseup&quot;; break;
default: return;
}
//initMouseEvent(type, canBubble, cancelable, view, clickCount,
// screenX, screenY, clientX, clientY, ctrlKey,
// altKey, shiftKey, metaKey, button, relatedTarget);
var window = this.getCanvasWindow();
var document = window.document;
var simulatedEvent = document.createEvent(&quot;MouseEvent&quot;);
simulatedEvent.initMouseEvent(type, true, true, window, 1,
first.screenX, first.screenY,
first.clientX, first.clientY, false,
false, false, false, 0/*left*/, null);
first.target.dispatchEvent(simulatedEvent);
event.preventDefault();
}
/* CONTEXT MENU ********************/
LGraphCanvas.onMenuAdd = function(node, e, prev_menu, canvas, first_event )
{
var window = canvas.getCanvasWindow();
var values = LiteGraph.getNodeTypesCategories();
var entries = {};
for(var i in values)
if(values[i])
entries[ i ] = { value: values[i], content: values[i] , is_menu: true };
var menu = LiteGraph.createContextualMenu(entries, {event: e, callback: inner_clicked, from: prev_menu}, window);
function inner_clicked(v, e)
{
var category = v.value;
var node_types = LiteGraph.getNodeTypesInCategory(category);
var values = [];
for(var i in node_types)
values.push( { content: node_types[i].title, value: node_types[i].type });
LiteGraph.createContextualMenu(values, {event: e, callback: inner_create, from: menu}, window);
return false;
}
function inner_create(v, e)
{
var node = LiteGraph.createNode( v.value );
if(node)
{
node.pos = canvas.convertEventToCanvas(first_event);
canvas.graph.add( node );
}
}
return false;
}
LGraphCanvas.onMenuCollapseAll = function()
{
}
LGraphCanvas.onMenuNodeEdit = function()
{
}
LGraphCanvas.onMenuNodeInputs = function(node, e, prev_menu)
{
if(!node) return;
var options = node.optional_inputs;
if(node.onGetInputs)
options = node.onGetInputs();
if(options)
{
var entries = [];
for (var i in options)
{
var entry = options[i];
var label = entry[0];
if(entry[2] &amp;&amp; entry[2].label)
label = entry[2].label;
entries.push({content: label, value: entry});
}
var menu = LiteGraph.createContextualMenu(entries, {event: e, callback: inner_clicked, from: prev_menu});
}
function inner_clicked(v)
{
if(!node) return;
node.addInput(v.value[0],v.value[1], v.value[2]);
}
return false;
}
LGraphCanvas.onMenuNodeOutputs = function(node, e, prev_menu)
{
if(!node) return;
var options = node.optional_outputs;
if(node.onGetOutputs)
options = node.onGetOutputs();
if(options)
{
var entries = [];
for (var i in options)
{
var entry = options[i];
if(node.findOutputSlot(entry[0]) != -1)
continue; //skip the ones already on
var label = entry[0];
if(entry[2] &amp;&amp; entry[2].label)
label = entry[2].label;
entries.push({content: label, value: entry});
}
if(entries.length)
var menu = LiteGraph.createContextualMenu(entries, {event: e, callback: inner_clicked, from: prev_menu});
}
function inner_clicked(v)
{
if(!node)
return;
var value = v.value[1];
if(value &amp;&amp; (value.constructor === Object || value.constructor === Array)) //submenu
{
var entries = [];
for(var i in value)
entries.push({content: i, value: value[i]});
LiteGraph.createContextualMenu(entries, {event: e, callback: inner_clicked, from: prev_menu});
return false;
}
else
node.addOutput(v.value[0], v.value[1], v.value[2]);
}
return false;
}
LGraphCanvas.onMenuNodeCollapse = function(node)
{
node.flags.collapsed = !node.flags.collapsed;
node.setDirtyCanvas(true,true);
}
LGraphCanvas.onMenuNodePin = function(node)
{
node.pin();
}
LGraphCanvas.onMenuNodeColors = function(node, e, prev_menu)
{
var values = [];
for(var i in LGraphCanvas.node_colors)
{
var color = LGraphCanvas.node_colors[i];
var value = {value:i, content:&quot;&lt;span style=&#x27;display: block; color:&quot;+color.color+&quot;; background-color:&quot;+color.bgcolor+&quot;&#x27;&gt;&quot;+i+&quot;&lt;/span&gt;&quot;};
values.push(value);
}
LiteGraph.createContextualMenu(values, {event: e, callback: inner_clicked, from: prev_menu});
function inner_clicked(v)
{
if(!node) return;
var color = LGraphCanvas.node_colors[v.value];
if(color)
{
node.color = color.color;
node.bgcolor = color.bgcolor;
node.setDirtyCanvas(true);
}
}
return false;
}
LGraphCanvas.onMenuNodeShapes = function(node,e)
{
LiteGraph.createContextualMenu([&quot;box&quot;,&quot;round&quot;], {event: e, callback: inner_clicked});
function inner_clicked(v)
{
if(!node) return;
node.shape = v;
node.setDirtyCanvas(true);
}
return false;
}
LGraphCanvas.onMenuNodeRemove = function(node)
{
if(node.removable == false) return;
node.graph.remove(node);
node.setDirtyCanvas(true,true);
}
LGraphCanvas.onMenuNodeClone = function(node)
{
if(node.clonable == false) return;
var newnode = node.clone();
if(!newnode) return;
newnode.pos = [node.pos[0]+5,node.pos[1]+5];
node.graph.add(newnode);
node.setDirtyCanvas(true,true);
}
LGraphCanvas.node_colors = {
&quot;red&quot;: { color:&quot;#FAA&quot;, bgcolor:&quot;#A44&quot; },
&quot;green&quot;: { color:&quot;#AFA&quot;, bgcolor:&quot;#4A4&quot; },
&quot;blue&quot;: { color:&quot;#AAF&quot;, bgcolor:&quot;#44A&quot; },
&quot;white&quot;: { color:&quot;#FFF&quot;, bgcolor:&quot;#AAA&quot; }
};
LGraphCanvas.prototype.getCanvasMenuOptions = function()
{
var options = null;
if(this.getMenuOptions)
options = this.getMenuOptions();
else
{
options = [
{content:&quot;Add Node&quot;, is_menu: true, callback: LGraphCanvas.onMenuAdd }
//{content:&quot;Collapse All&quot;, callback: LGraphCanvas.onMenuCollapseAll }
];
if(this._graph_stack &amp;&amp; this._graph_stack.length &gt; 0)
options = [{content:&quot;Close subgraph&quot;, callback: this.closeSubgraph.bind(this) },null].concat(options);
}
if(this.getExtraMenuOptions)
{
var extra = this.getExtraMenuOptions(this);
if(extra)
{
extra.push(null);
options = extra.concat( options );
}
}
return options;
}
LGraphCanvas.prototype.getNodeMenuOptions = function(node)
{
var options = null;
if(node.getMenuOptions)
options = node.getMenuOptions(this);
else
options = [
{content:&quot;Inputs&quot;, is_menu: true, disabled:true, callback: LGraphCanvas.onMenuNodeInputs },
{content:&quot;Outputs&quot;, is_menu: true, disabled:true, callback: LGraphCanvas.onMenuNodeOutputs },
null,
{content:&quot;Collapse&quot;, callback: LGraphCanvas.onMenuNodeCollapse },
{content:&quot;Pin&quot;, callback: LGraphCanvas.onMenuNodePin },
{content:&quot;Colors&quot;, is_menu: true, callback: LGraphCanvas.onMenuNodeColors },
{content:&quot;Shapes&quot;, is_menu: true, callback: LGraphCanvas.onMenuNodeShapes },
null
];
if(node.getExtraMenuOptions)
{
var extra = node.getExtraMenuOptions(this);
if(extra)
{
extra.push(null);
options = extra.concat( options );
}
}
if( node.clonable !== false )
options.push({content:&quot;Clone&quot;, callback: LGraphCanvas.onMenuNodeClone });
if( node.removable !== false )
options.push(null,{content:&quot;Remove&quot;, callback: LGraphCanvas.onMenuNodeRemove });
if(node.onGetInputs)
{
var inputs = node.onGetInputs();
if(inputs &amp;&amp; inputs.length)
options[0].disabled = false;
}
if(node.onGetOutputs)
{
var outputs = node.onGetOutputs();
if(outputs &amp;&amp; outputs.length )
options[1].disabled = false;
}
return options;
}
LGraphCanvas.prototype.processContextualMenu = function(node,event)
{
var that = this;
var win = this.getCanvasWindow();
var menu = LiteGraph.createContextualMenu(node ? this.getNodeMenuOptions(node) : this.getCanvasMenuOptions(), {event: event, callback: inner_option_clicked}, win);
function inner_option_clicked(v,e)
{
if(!v) return;
if(v.callback)
return v.callback(node, e, menu, that, event );
}
}
//API *************************************************
//function roundRect(ctx, x, y, width, height, radius, radius_low) {
CanvasRenderingContext2D.prototype.roundRect = function (x, y, width, height, radius, radius_low) {
if ( radius === undefined ) {
radius = 5;
}
if(radius_low === undefined)
radius_low = radius;
this.beginPath();
this.moveTo(x + radius, y);
this.lineTo(x + width - radius, y);
this.quadraticCurveTo(x + width, y, x + width, y + radius);
this.lineTo(x + width, y + height - radius_low);
this.quadraticCurveTo(x + width, y + height, x + width - radius_low, y + height);
this.lineTo(x + radius_low, y + height);
this.quadraticCurveTo(x, y + height, x, y + height - radius_low);
this.lineTo(x, y + radius);
this.quadraticCurveTo(x, y, x + radius, y);
}
function compareObjects(a,b)
{
for(var i in a)
if(a[i] != b[i])
return false;
return true;
}
function distance(a,b)
{
return Math.sqrt( (b[0] - a[0]) * (b[0] - a[0]) + (b[1] - a[1]) * (b[1] - a[1]) );
}
function colorToString(c)
{
return &quot;rgba(&quot; + Math.round(c[0] * 255).toFixed() + &quot;,&quot; + Math.round(c[1] * 255).toFixed() + &quot;,&quot; + Math.round(c[2] * 255).toFixed() + &quot;,&quot; + (c.length == 4 ? c[3].toFixed(2) : &quot;1.0&quot;) + &quot;)&quot;;
}
function isInsideRectangle(x,y, left, top, width, height)
{
if (left &lt; x &amp;&amp; (left + width) &gt; x &amp;&amp;
top &lt; y &amp;&amp; (top + height) &gt; y)
return true;
return false;
}
//[minx,miny,maxx,maxy]
function growBounding(bounding, x,y)
{
if(x &lt; bounding[0])
bounding[0] = x;
else if(x &gt; bounding[2])
bounding[2] = x;
if(y &lt; bounding[1])
bounding[1] = y;
else if(y &gt; bounding[3])
bounding[3] = y;
}
//point inside boundin box
function isInsideBounding(p,bb)
{
if (p[0] &lt; bb[0][0] ||
p[1] &lt; bb[0][1] ||
p[0] &gt; bb[1][0] ||
p[1] &gt; bb[1][1])
return false;
return true;
}
//boundings overlap, format: [start,end]
function overlapBounding(a,b)
{
if ( a[0] &gt; b[2] ||
a[1] &gt; b[3] ||
a[2] &lt; b[0] ||
a[3] &lt; b[1])
return false;
return true;
}
//Convert a hex value to its decimal value - the inputted hex must be in the
// format of a hex triplet - the kind we use for HTML colours. The function
// will return an array with three values.
function hex2num(hex) {
if(hex.charAt(0) == &quot;#&quot;) hex = hex.slice(1); //Remove the &#x27;#&#x27; char - if there is one.
hex = hex.toUpperCase();
var hex_alphabets = &quot;0123456789ABCDEF&quot;;
var value = new Array(3);
var k = 0;
var int1,int2;
for(var i=0;i&lt;6;i+=2) {
int1 = hex_alphabets.indexOf(hex.charAt(i));
int2 = hex_alphabets.indexOf(hex.charAt(i+1));
value[k] = (int1 * 16) + int2;
k++;
}
return(value);
}
//Give a array with three values as the argument and the function will return
// the corresponding hex triplet.
function num2hex(triplet) {
var hex_alphabets = &quot;0123456789ABCDEF&quot;;
var hex = &quot;#&quot;;
var int1,int2;
for(var i=0;i&lt;3;i++) {
int1 = triplet[i] / 16;
int2 = triplet[i] % 16;
hex += hex_alphabets.charAt(int1) + hex_alphabets.charAt(int2);
}
return(hex);
}
/* LiteGraph GUI elements *************************************/
LiteGraph.createContextualMenu = function(values,options, ref_window)
{
options = options || {};
this.options = options;
//allows to create graph canvas in separate window
ref_window = ref_window || window;
if(!options.from)
LiteGraph.closeAllContextualMenus();
var root = ref_window.document.createElement(&quot;div&quot;);
root.className = &quot;graphcontextualmenu graphmenubar-panel&quot;;
this.root = root;
var style = root.style;
style.minWidth = &quot;100px&quot;;
style.minHeight = &quot;20px&quot;;
style.position = &quot;fixed&quot;;
style.top = &quot;100px&quot;;
style.left = &quot;100px&quot;;
style.color = &quot;#AAF&quot;;
style.padding = &quot;2px&quot;;
style.borderBottom = &quot;2px solid #AAF&quot;;
style.backgroundColor = &quot;#444&quot;;
//avoid a context menu in a context menu
root.addEventListener(&quot;contextmenu&quot;, function(e) { e.preventDefault(); return false; });
for(var i in values)
{
var item = values[i];
var element = ref_window.document.createElement(&quot;div&quot;);
element.className = &quot;graphmenu-entry&quot;;
if(item == null)
{
element.className = &quot;graphmenu-entry separator&quot;;
root.appendChild(element);
continue;
}
if(item.is_menu)
element.className += &quot; submenu&quot;;
if(item.disabled)
element.className += &quot; disabled&quot;;
element.style.cursor = &quot;pointer&quot;;
element.dataset[&quot;value&quot;] = typeof(item) == &quot;string&quot; ? item : item.value;
element.data = item;
if(typeof(item) == &quot;string&quot;)
element.innerHTML = values.constructor == Array ? values[i] : i;
else
element.innerHTML = item.content ? item.content : i;
element.addEventListener(&quot;click&quot;, on_click );
root.appendChild(element);
}
root.addEventListener(&quot;mouseover&quot;, function(e) {
this.mouse_inside = true;
});
root.addEventListener(&quot;mouseout&quot;, function(e) {
//console.log(&quot;OUT!&quot;);
var aux = e.toElement;
while(aux != this &amp;&amp; aux != ref_window.document)
aux = aux.parentNode;
if(aux == this) return;
this.mouse_inside = false;
if(!this.block_close)
this.closeMenu();
});
//insert before checking position
ref_window.document.body.appendChild(root);
var root_rect = root.getClientRects()[0];
//link menus
if(options.from)
{
options.from.block_close = true;
}
var left = options.left || 0;
var top = options.top || 0;
if(options.event)
{
left = (options.event.pageX - 10);
top = (options.event.pageY - 10);
if(options.left)
left = options.left;
var rect = ref_window.document.body.getClientRects()[0];
if(options.from)
{
var parent_rect = options.from.getClientRects()[0];
left = parent_rect.left + parent_rect.width;
}
if(left &gt; (rect.width - root_rect.width - 10))
left = (rect.width - root_rect.width - 10);
if(top &gt; (rect.height - root_rect.height - 10))
top = (rect.height - root_rect.height - 10);
}
root.style.left = left + &quot;px&quot;;
root.style.top = top + &quot;px&quot;;
function on_click(e) {
var value = this.dataset[&quot;value&quot;];
var close = true;
if(options.callback)
{
var ret = options.callback.call(root, this.data, e );
if( ret !== undefined ) close = ret;
}
if(close)
LiteGraph.closeAllContextualMenus();
//root.closeMenu();
}
root.closeMenu = function()
{
if(options.from)
{
options.from.block_close = false;
if(!options.from.mouse_inside)
options.from.closeMenu();
}
if(this.parentNode)
ref_window.document.body.removeChild(this);
};
return root;
}
LiteGraph.closeAllContextualMenus = function()
{
var elements = document.querySelectorAll(&quot;.graphcontextualmenu&quot;);
if(!elements.length) return;
var result = [];
for(var i = 0; i &lt; elements.length; i++)
result.push(elements[i]);
for(var i in result)
if(result[i].parentNode)
result[i].parentNode.removeChild( result[i] );
}
LiteGraph.extendClass = function ( target, origin )
{
for(var i in origin) //copy class properties
{
if(target.hasOwnProperty(i))
continue;
target[i] = origin[i];
}
if(origin.prototype) //copy prototype properties
for(var i in origin.prototype) //only enumerables
{
if(!origin.prototype.hasOwnProperty(i))
continue;
if(target.prototype.hasOwnProperty(i)) //avoid overwritting existing ones
continue;
//copy getters
if(origin.prototype.__lookupGetter__(i))
target.prototype.__defineGetter__(i, origin.prototype.__lookupGetter__(i));
else
target.prototype[i] = origin.prototype[i];
//and setters
if(origin.prototype.__lookupSetter__(i))
target.prototype.__defineSetter__(i, origin.prototype.__lookupSetter__(i));
}
}
/*
LiteGraph.createNodetypeWrapper = function( class_object )
{
//create Nodetype object
}
//LiteGraph.registerNodeType(&quot;scene/global&quot;, LGraphGlobal );
*/
if( !window[&quot;requestAnimationFrame&quot;] )
{
window.requestAnimationFrame = window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
(function( callback ){
window.setTimeout(callback, 1000 / 60);
});
}
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