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Graph.js
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Graph.js
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/*
* File: Graph.js
*
*/
/*
Class: Graph
A Graph Class that provides useful manipulation functions. You can find more manipulation methods in the <Graph.Util> object.
An instance of this class can be accessed by using the *graph* parameter of any tree or graph visualization.
Example:
(start code js)
//create new visualization
var viz = new $jit.Viz(options);
//load JSON data
viz.loadJSON(json);
//access model
viz.graph; //<Graph> instance
(end code)
Implements:
The following <Graph.Util> methods are implemented in <Graph>
- <Graph.Util.getNode>
- <Graph.Util.eachNode>
- <Graph.Util.computeLevels>
- <Graph.Util.eachBFS>
- <Graph.Util.clean>
- <Graph.Util.getClosestNodeToPos>
- <Graph.Util.getClosestNodeToOrigin>
*/
$jit.Graph = new Class({
initialize: function(opt, Node, Edge, Label) {
var innerOptions = {
'klass': Complex,
'Node': {}
};
this.Node = Node;
this.Edge = Edge;
this.Label = Label;
this.opt = $.merge(innerOptions, opt || {});
this.nodes = {};
this.edges = {};
//add nodeList methods
var that = this;
this.nodeList = {};
for(var p in Accessors) {
that.nodeList[p] = (function(p) {
return function() {
var args = Array.prototype.slice.call(arguments);
that.eachNode(function(n) {
n[p].apply(n, args);
});
};
})(p);
}
},
/*
Method: getNode
Returns a <Graph.Node> by *id*.
Parameters:
id - (string) A <Graph.Node> id.
Example:
(start code js)
var node = graph.getNode('nodeId');
(end code)
*/
getNode: function(id) {
if(this.hasNode(id)) return this.nodes[id];
return false;
},
/*
Method: get
An alias for <Graph.Util.getNode>. Returns a node by *id*.
Parameters:
id - (string) A <Graph.Node> id.
Example:
(start code js)
var node = graph.get('nodeId');
(end code)
*/
get: function(id) {
return this.getNode(id);
},
/*
Method: getByName
Returns a <Graph.Node> by *name*.
Parameters:
name - (string) A <Graph.Node> name.
Example:
(start code js)
var node = graph.getByName('someName');
(end code)
*/
getByName: function(name) {
for(var id in this.nodes) {
var n = this.nodes[id];
if(n.name == name) return n;
}
return false;
},
/*
Method: getAdjacence
Returns a <Graph.Adjacence> object connecting nodes with ids *id* and *id2*.
Parameters:
id - (string) A <Graph.Node> id.
id2 - (string) A <Graph.Node> id.
*/
getAdjacence: function (id, id2) {
if(id in this.edges) {
return this.edges[id][id2];
}
return false;
},
/*
Method: addNode
Adds a node.
Parameters:
obj - An object with the properties described below
id - (string) A node id
name - (string) A node's name
data - (object) A node's data hash
See also:
<Graph.Node>
*/
addNode: function(obj) {
if(!this.nodes[obj.id]) {
var edges = this.edges[obj.id] = {};
this.nodes[obj.id] = new Graph.Node($.extend({
'id': obj.id,
'name': obj.name,
'data': $.merge(obj.data || {}, {}),
'adjacencies': edges
}, this.opt.Node),
this.opt.klass,
this.Node,
this.Edge,
this.Label);
}
return this.nodes[obj.id];
},
/*
Method: addAdjacence
Connects nodes specified by *obj* and *obj2*. If not found, nodes are created.
Parameters:
obj - (object) A <Graph.Node> object.
obj2 - (object) Another <Graph.Node> object.
data - (object) A data object. Used to store some extra information in the <Graph.Adjacence> object created.
See also:
<Graph.Node>, <Graph.Adjacence>
*/
addAdjacence: function (obj, obj2, data) {
if(!this.hasNode(obj.id)) { this.addNode(obj); }
if(!this.hasNode(obj2.id)) { this.addNode(obj2); }
obj = this.nodes[obj.id]; obj2 = this.nodes[obj2.id];
if(!obj.adjacentTo(obj2)) {
var adjsObj = this.edges[obj.id] = this.edges[obj.id] || {};
var adjsObj2 = this.edges[obj2.id] = this.edges[obj2.id] || {};
adjsObj[obj2.id] = adjsObj2[obj.id] = new Graph.Adjacence(obj, obj2, data, this.Edge, this.Label);
return adjsObj[obj2.id];
}
return this.edges[obj.id][obj2.id];
},
/*
Method: removeNode
Removes a <Graph.Node> matching the specified *id*.
Parameters:
id - (string) A node's id.
*/
removeNode: function(id) {
if(this.hasNode(id)) {
delete this.nodes[id];
var adjs = this.edges[id];
for(var to in adjs) {
delete this.edges[to][id];
}
delete this.edges[id];
}
},
/*
Method: removeAdjacence
Removes a <Graph.Adjacence> matching *id1* and *id2*.
Parameters:
id1 - (string) A <Graph.Node> id.
id2 - (string) A <Graph.Node> id.
*/
removeAdjacence: function(id1, id2) {
delete this.edges[id1][id2];
delete this.edges[id2][id1];
},
/*
Method: hasNode
Returns a boolean indicating if the node belongs to the <Graph> or not.
Parameters:
id - (string) Node id.
*/
hasNode: function(id) {
return id in this.nodes;
},
/*
Method: empty
Empties the Graph
*/
empty: function() { this.nodes = {}; this.edges = {};}
});
var Graph = $jit.Graph;
/*
Object: Accessors
Defines a set of methods for data, canvas and label styles manipulation implemented by <Graph.Node> and <Graph.Adjacence> instances.
*/
var Accessors;
(function () {
var getDataInternal = function(prefix, prop, type, force, prefixConfig) {
var data;
type = type || 'current';
prefix = "$" + (prefix ? prefix + "-" : "");
if(type == 'current') {
data = this.data;
} else if(type == 'start') {
data = this.startData;
} else if(type == 'end') {
data = this.endData;
}
var dollar = prefix + prop;
if(force) {
return data[dollar];
}
if(!this.Config.overridable)
return prefixConfig[prop] || 0;
return (dollar in data) ?
data[dollar] : ((dollar in this.data) ? this.data[dollar] : (prefixConfig[prop] || 0));
}
var setDataInternal = function(prefix, prop, value, type) {
type = type || 'current';
prefix = '$' + (prefix ? prefix + '-' : '');
var data;
if(type == 'current') {
data = this.data;
} else if(type == 'start') {
data = this.startData;
} else if(type == 'end') {
data = this.endData;
}
data[prefix + prop] = value;
}
var removeDataInternal = function(prefix, properties) {
prefix = '$' + (prefix ? prefix + '-' : '');
var that = this;
$.each(properties, function(prop) {
var pref = prefix + prop;
delete that.data[pref];
delete that.endData[pref];
delete that.startData[pref];
});
}
Accessors = {
/*
Method: getData
Returns the specified data value property.
This is useful for querying special/reserved <Graph.Node> data properties
(i.e dollar prefixed properties).
Parameters:
prop - (string) The name of the property. The dollar sign is not needed. For
example *getData(width)* will return *data.$width*.
type - (string) The type of the data property queried. Default's "current". You can access *start* and *end*
data properties also. These properties are used when making animations.
force - (boolean) Whether to obtain the true value of the property (equivalent to
*data.$prop*) or to check for *node.overridable = true* first.
Returns:
The value of the dollar prefixed property or the global Node/Edge property
value if *overridable=false*
Example:
(start code js)
node.getData('width'); //will return node.data.$width if Node.overridable=true;
(end code)
*/
getData: function(prop, type, force) {
return getDataInternal.call(this, "", prop, type, force, this.Config);
},
/*
Method: setData
Sets the current data property with some specific value.
This method is only useful for reserved (dollar prefixed) properties.
Parameters:
prop - (string) The name of the property. The dollar sign is not necessary. For
example *setData(width)* will set *data.$width*.
value - (mixed) The value to store.
type - (string) The type of the data property to store. Default's "current" but
can also be "start" or "end".
Example:
(start code js)
node.setData('width', 30);
(end code)
If we were to make an animation of a node/edge width then we could do
(start code js)
var node = viz.getNode('nodeId');
//set start and end values
node.setData('width', 10, 'start');
node.setData('width', 30, 'end');
//will animate nodes width property
viz.fx.animate({
modes: ['node-property:width'],
duration: 1000
});
(end code)
*/
setData: function(prop, value, type) {
setDataInternal.call(this, "", prop, value, type);
},
/*
Method: setDataset
Convenience method to set multiple data values at once.
Parameters:
types - (array|string) A set of 'current', 'end' or 'start' values.
obj - (object) A hash containing the names and values of the properties to be altered.
Example:
(start code js)
node.setDataset(['current', 'end'], {
'width': [100, 5],
'color': ['#fff', '#ccc']
});
//...or also
node.setDataset('end', {
'width': 5,
'color': '#ccc'
});
(end code)
See also:
<Accessors.setData>
*/
setDataset: function(types, obj) {
types = $.splat(types);
for(var attr in obj) {
for(var i=0, val = $.splat(obj[attr]), l=types.length; i<l; i++) {
this.setData(attr, val[i], types[i]);
}
}
},
/*
Method: removeData
Remove data properties.
Parameters:
One or more property names as arguments. The dollar sign is not needed.
Example:
(start code js)
node.removeData('width'); //now the default width value is returned
(end code)
*/
removeData: function() {
removeDataInternal.call(this, "", Array.prototype.slice.call(arguments));
},
/*
Method: getCanvasStyle
Returns the specified canvas style data value property. This is useful for
querying special/reserved <Graph.Node> canvas style data properties (i.e.
dollar prefixed properties that match with $canvas-<name of canvas style>).
Parameters:
prop - (string) The name of the property. The dollar sign is not needed. For
example *getCanvasStyle(shadowBlur)* will return *data[$canvas-shadowBlur]*.
type - (string) The type of the data property queried. Default's *current*. You can access *start* and *end*
data properties also.
Example:
(start code js)
node.getCanvasStyle('shadowBlur');
(end code)
See also:
<Accessors.getData>
*/
getCanvasStyle: function(prop, type, force) {
return getDataInternal.call(
this, 'canvas', prop, type, force, this.Config.CanvasStyles);
},
/*
Method: setCanvasStyle
Sets the canvas style data property with some specific value.
This method is only useful for reserved (dollar prefixed) properties.
Parameters:
prop - (string) Name of the property. Can be any canvas property like 'shadowBlur', 'shadowColor', 'strokeStyle', etc.
value - (mixed) The value to set to the property.
type - (string) Default's *current*. Whether to set *start*, *current* or *end* type properties.
Example:
(start code js)
node.setCanvasStyle('shadowBlur', 30);
(end code)
If we were to make an animation of a node/edge shadowBlur canvas style then we could do
(start code js)
var node = viz.getNode('nodeId');
//set start and end values
node.setCanvasStyle('shadowBlur', 10, 'start');
node.setCanvasStyle('shadowBlur', 30, 'end');
//will animate nodes canvas style property for nodes
viz.fx.animate({
modes: ['node-style:shadowBlur'],
duration: 1000
});
(end code)
See also:
<Accessors.setData>.
*/
setCanvasStyle: function(prop, value, type) {
setDataInternal.call(this, 'canvas', prop, value, type);
},
/*
Method: setCanvasStyles
Convenience method to set multiple styles at once.
Parameters:
types - (array|string) A set of 'current', 'end' or 'start' values.
obj - (object) A hash containing the names and values of the properties to be altered.
See also:
<Accessors.setDataset>.
*/
setCanvasStyles: function(types, obj) {
types = $.splat(types);
for(var attr in obj) {
for(var i=0, val = $.splat(obj[attr]), l=types.length; i<l; i++) {
this.setCanvasStyle(attr, val[i], types[i]);
}
}
},
/*
Method: removeCanvasStyle
Remove canvas style properties from data.
Parameters:
A variable number of canvas style strings.
See also:
<Accessors.removeData>.
*/
removeCanvasStyle: function() {
removeDataInternal.call(this, 'canvas', Array.prototype.slice.call(arguments));
},
/*
Method: getLabelData
Returns the specified label data value property. This is useful for
querying special/reserved <Graph.Node> label options (i.e.
dollar prefixed properties that match with $label-<name of label style>).
Parameters:
prop - (string) The name of the property. The dollar sign prefix is not needed. For
example *getLabelData(size)* will return *data[$label-size]*.
type - (string) The type of the data property queried. Default's *current*. You can access *start* and *end*
data properties also.
See also:
<Accessors.getData>.
*/
getLabelData: function(prop, type, force) {
return getDataInternal.call(
this, 'label', prop, type, force, this.Label);
},
/*
Method: setLabelData
Sets the current label data with some specific value.
This method is only useful for reserved (dollar prefixed) properties.
Parameters:
prop - (string) Name of the property. Can be any canvas property like 'shadowBlur', 'shadowColor', 'strokeStyle', etc.
value - (mixed) The value to set to the property.
type - (string) Default's *current*. Whether to set *start*, *current* or *end* type properties.
Example:
(start code js)
node.setLabelData('size', 30);
(end code)
If we were to make an animation of a node label size then we could do
(start code js)
var node = viz.getNode('nodeId');
//set start and end values
node.setLabelData('size', 10, 'start');
node.setLabelData('size', 30, 'end');
//will animate nodes label size
viz.fx.animate({
modes: ['label-property:size'],
duration: 1000
});
(end code)
See also:
<Accessors.setData>.
*/
setLabelData: function(prop, value, type) {
setDataInternal.call(this, 'label', prop, value, type);
},
/*
Method: setLabelDataset
Convenience function to set multiple label data at once.
Parameters:
types - (array|string) A set of 'current', 'end' or 'start' values.
obj - (object) A hash containing the names and values of the properties to be altered.
See also:
<Accessors.setDataset>.
*/
setLabelDataset: function(types, obj) {
types = $.splat(types);
for(var attr in obj) {
for(var i=0, val = $.splat(obj[attr]), l=types.length; i<l; i++) {
this.setLabelData(attr, val[i], types[i]);
}
}
},
/*
Method: removeLabelData
Remove label properties from data.
Parameters:
A variable number of label property strings.
See also:
<Accessors.removeData>.
*/
removeLabelData: function() {
removeDataInternal.call(this, 'label', Array.prototype.slice.call(arguments));
}
};
})();
/*
Class: Graph.Node
A <Graph> node.
Implements:
<Accessors> methods.
The following <Graph.Util> methods are implemented by <Graph.Node>
- <Graph.Util.eachAdjacency>
- <Graph.Util.eachLevel>
- <Graph.Util.eachSubgraph>
- <Graph.Util.eachSubnode>
- <Graph.Util.anySubnode>
- <Graph.Util.getSubnodes>
- <Graph.Util.getParents>
- <Graph.Util.isDescendantOf>
*/
Graph.Node = new Class({
initialize: function(opt, klass, Node, Edge, Label) {
var innerOptions = {
'id': '',
'name': '',
'data': {},
'startData': {},
'endData': {},
'adjacencies': {},
'selected': false,
'drawn': false,
'exist': false,
'angleSpan': {
'begin': 0,
'end' : 0
},
'pos': new klass,
'startPos': new klass,
'endPos': new klass
};
$.extend(this, $.extend(innerOptions, opt));
this.Config = this.Node = Node;
this.Edge = Edge;
this.Label = Label;
},
/*
Method: adjacentTo
Indicates if the node is adjacent to the node specified by id
Parameters:
id - (string) A node id.
Example:
(start code js)
node.adjacentTo('nodeId') == true;
(end code)
*/
adjacentTo: function(node) {
return node.id in this.adjacencies;
},
/*
Method: getAdjacency
Returns a <Graph.Adjacence> object connecting the current <Graph.Node> and the node having *id* as id.
Parameters:
id - (string) A node id.
*/
getAdjacency: function(id) {
return this.adjacencies[id];
},
/*
Method: getPos
Returns the position of the node.
Parameters:
type - (string) Default's *current*. Possible values are "start", "end" or "current".
Returns:
A <Complex> or <Polar> instance.
Example:
(start code js)
var pos = node.getPos('end');
(end code)
*/
getPos: function(type) {
type = type || "current";
if(type == "current") {
return this.pos;
} else if(type == "end") {
return this.endPos;
} else if(type == "start") {
return this.startPos;
}
},
/*
Method: setPos
Sets the node's position.
Parameters:
value - (object) A <Complex> or <Polar> instance.
type - (string) Default's *current*. Possible values are "start", "end" or "current".
Example:
(start code js)
node.setPos(new $jit.Complex(0, 0), 'end');
(end code)
*/
setPos: function(value, type) {
type = type || "current";
var pos;
if(type == "current") {
pos = this.pos;
} else if(type == "end") {
pos = this.endPos;
} else if(type == "start") {
pos = this.startPos;
}
pos.set(value);
}
});
Graph.Node.implement(Accessors);
/*
Class: Graph.Adjacence
A <Graph> adjacence (or edge) connecting two <Graph.Nodes>.
Implements:
<Accessors> methods.
See also:
<Graph>, <Graph.Node>
Properties:
nodeFrom - A <Graph.Node> connected by this edge.
nodeTo - Another <Graph.Node> connected by this edge.
data - Node data property containing a hash (i.e {}) with custom options.
*/
Graph.Adjacence = new Class({
initialize: function(nodeFrom, nodeTo, data, Edge, Label) {
this.nodeFrom = nodeFrom;
this.nodeTo = nodeTo;
this.data = data || {};
this.startData = {};
this.endData = {};
this.Config = this.Edge = Edge;
this.Label = Label;
}
});
Graph.Adjacence.implement(Accessors);
/*
Object: Graph.Util
<Graph> traversal and processing utility object.
Note:
For your convenience some of these methods have also been appended to <Graph> and <Graph.Node> classes.
*/
Graph.Util = {
/*
filter
For internal use only. Provides a filtering function based on flags.
*/
filter: function(param) {
if(!param || !($.type(param) == 'string')) return function() { return true; };
var props = param.split(" ");
return function(elem) {
for(var i=0; i<props.length; i++) {
if(elem[props[i]]) {
return false;
}
}
return true;
};
},
/*
Method: getNode
Returns a <Graph.Node> by *id*.
Also implemented by:
<Graph>
Parameters:
graph - (object) A <Graph> instance.
id - (string) A <Graph.Node> id.
Example:
(start code js)
$jit.Graph.Util.getNode(graph, 'nodeid');
//or...
graph.getNode('nodeid');
(end code)
*/
getNode: function(graph, id) {
return graph.nodes[id];
},
/*
Method: eachNode
Iterates over <Graph> nodes performing an *action*.
Also implemented by:
<Graph>.
Parameters:
graph - (object) A <Graph> instance.
action - (function) A callback function having a <Graph.Node> as first formal parameter.
Example:
(start code js)
$jit.Graph.Util.eachNode(graph, function(node) {
alert(node.name);
});
//or...
graph.eachNode(function(node) {
alert(node.name);
});
(end code)
*/
eachNode: function(graph, action, flags) {
var filter = this.filter(flags);
for(var i in graph.nodes) {
if(filter(graph.nodes[i])) action(graph.nodes[i]);
}
},
/*
Method: each
Iterates over <Graph> nodes performing an *action*. It's an alias for <Graph.Util.eachNode>.
Also implemented by:
<Graph>.
Parameters:
graph - (object) A <Graph> instance.
action - (function) A callback function having a <Graph.Node> as first formal parameter.
Example:
(start code js)
$jit.Graph.Util.each(graph, function(node) {
alert(node.name);
});
//or...
graph.each(function(node) {
alert(node.name);
});
(end code)
*/
each: function(graph, action, flags) {
this.eachNode(graph, action, flags);
},
/*
Method: eachAdjacency
Iterates over <Graph.Node> adjacencies applying the *action* function.
Also implemented by:
<Graph.Node>.
Parameters:
node - (object) A <Graph.Node>.
action - (function) A callback function having <Graph.Adjacence> as first formal parameter.
Example:
(start code js)
$jit.Graph.Util.eachAdjacency(node, function(adj) {
alert(adj.nodeTo.name);
});
//or...
node.eachAdjacency(function(adj) {
alert(adj.nodeTo.name);
});
(end code)
*/
eachAdjacency: function(node, action, flags) {
var adj = node.adjacencies, filter = this.filter(flags);
for(var id in adj) {
var a = adj[id];
if(filter(a)) {
if(a.nodeFrom != node) {
var tmp = a.nodeFrom;
a.nodeFrom = a.nodeTo;
a.nodeTo = tmp;
}
action(a, id);
}
}
},
/*