wisemapping-open-source/core-js/src/main/javascript/Utils.js

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/*
* Copyright [2011] [wisemapping]
*
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* Licensed under WiseMapping Public License, Version 1.0 (the "License").
* It is basically the Apache License, Version 2.0 (the "License") plus the
* "powered by wisemapping" text requirement on every single page;
* you may not use this file except in compliance with the License.
* You may obtain a copy of the license at
*
* http://www.wisemapping.org/license
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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*/
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core.Utils =
{
isDefined: function(val)
{
return val !== null && val !== undefined;
},
escapeInvalidTags: function (text)
{
//todo:Pablo. scape invalid tags in a text
return text;
}
};
/**
* http://kevlindev.com/tutorials/javascript/inheritance/index.htm
* A function used to extend one class with another
*
* @param {Object} subClass
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* The inheriting class, or subclass
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* @param {Object} baseClass
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* The class from which to inherit
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*/
objects = {};
objects.extend = function(subClass, baseClass) {
function inheritance() {
}
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inheritance.prototype = baseClass.prototype;
subClass.prototype = new inheritance();
subClass.prototype.constructor = subClass;
subClass.baseConstructor = baseClass;
subClass.superClass = baseClass.prototype;
};
core.assert = function(assert, message)
{
if (!assert)
{
var stack;
try
{
null.eval();
} catch(e)
{
stack = e;
}
wLogger.error(message + "," + stack);
// core.Logger.logError(message + "," + stack);
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}
};
Math.sign = function(value)
{
return (value >= 0) ? 1 : -1;
};
// Extensions ....
function $import(src) {
var scriptElem = document.createElement('script');
scriptElem.setAttribute('src', src);
scriptElem.setAttribute('type', 'text/javascript');
document.getElementsByTagName('head')[0].appendChild(scriptElem);
}
/**
* Retrieve the mouse position.
*/
core.Utils.getMousePosition = function(event)
{
var xcoord = -1;
var ycoord = -1;
if (!event) {
if (window.event) {
//Internet Explorer
event = window.event;
} else {
//total failure, we have no way of referencing the event
throw "Could not obtain mouse position";
}
}
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if(core.Utils.isDefined(event.$extended)){
event = event.event;
}
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if (typeof( event.pageX ) == 'number') {
//most browsers
xcoord = event.pageX;
ycoord = event.pageY;
} else if (typeof( event.clientX ) == 'number') {
//Internet Explorer and older browsers
//other browsers provide this, but follow the pageX/Y branch
xcoord = event.clientX;
ycoord = event.clientY;
var badOldBrowser = ( window.navigator.userAgent.indexOf('Opera') + 1 ) ||
( window.ScriptEngine && ScriptEngine().indexOf('InScript') + 1 ) ||
( navigator.vendor == 'KDE' );
if (!badOldBrowser) {
if (document.body && ( document.body.scrollLeft || document.body.scrollTop )) {
//IE 4, 5 & 6 (in non-standards compliant mode)
xcoord += document.body.scrollLeft;
ycoord += document.body.scrollTop;
} else if (document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop )) {
//IE 6 (in standards compliant mode)
xcoord += document.documentElement.scrollLeft;
ycoord += document.documentElement.scrollTop;
}
}
} else {
throw "Could not obtain mouse position";
}
return {x:xcoord,y:ycoord};
};
/**
* Calculate the position of the passed element.
*/
core.Utils.workOutDivElementPosition = function(divElement)
{
var curleft = 0;
var curtop = 0;
if (divElement.offsetParent) {
curleft = divElement.offsetLeft;
curtop = divElement.offsetTop;
while (divElement = divElement.offsetParent) {
curleft += divElement.offsetLeft;
curtop += divElement.offsetTop;
}
}
return {x:curleft,y:curtop};
};
core.Utils.innerXML = function(/*Node*/node) {
// summary:
// Implementation of MS's innerXML function.
if (node.innerXML) {
return node.innerXML;
// string
} else if (node.xml) {
return node.xml;
// string
} else if (typeof XMLSerializer != "undefined") {
return (new XMLSerializer()).serializeToString(node);
// string
}
};
core.Utils.createDocument = function() {
// summary:
// cross-browser implementation of creating an XML document object.
var doc = null;
var _document = window.document;
if (window.ActiveXObject) {
var prefixes = [ "MSXML2", "Microsoft", "MSXML", "MSXML3" ];
for (var i = 0; i < prefixes.length; i++) {
try {
doc = new ActiveXObject(prefixes[i] + ".XMLDOM");
} catch(e) { /* squelch */
}
;
if (doc) {
break;
}
}
} else if ((_document.implementation) &&
(_document.implementation.createDocument)) {
doc = _document.implementation.createDocument("", "", null);
}
return doc;
// DOMDocument
};
core.Utils.createDocumentFromText = function(/*string*/str, /*string?*/mimetype) {
// summary:
// attempts to create a Document object based on optional mime-type,
// using str as the contents of the document
if (!mimetype) {
mimetype = "text/xml";
}
if (window.DOMParser)
{
var parser = new DOMParser();
return parser.parseFromString(str, mimetype);
// DOMDocument
} else if (window.ActiveXObject) {
var domDoc = core.Utils.createDocument();
if (domDoc) {
domDoc.async = false;
domDoc.loadXML(str);
return domDoc;
// DOMDocument
}
}
return null;
};
core.Utils.calculateRelationShipPointCoordinates = function(topic,controlPoint){
var size = topic.getSize();
var position = topic.getPosition();
var m = (position.y-controlPoint.y)/(position.x-controlPoint.x);
var y,x;
var gap = 5;
if(controlPoint.y>position.y+(size.height/2)){
y = position.y+(size.height/2)+gap;
x = position.x-((position.y-y)/m);
if(x>position.x+(size.width/2)){
x=position.x+(size.width/2);
}else if(x<position.x-(size.width/2)){
x=position.x-(size.width/2);
}
}else if(controlPoint.y<position.y-(size.height/2)){
y = position.y-(size.height/2) - gap;
x = position.x-((position.y-y)/m);
if(x>position.x+(size.width/2)){
x=position.x+(size.width/2);
}else if(x<position.x-(size.width/2)){
x=position.x-(size.width/2);
}
}else if(controlPoint.x<(position.x-size.width/2)){
x = position.x-(size.width/2) -gap;
y = position.y-(m*(position.x-x));
}else{
x = position.x+(size.width/2) + gap;
y = position.y-(m*(position.x-x));
}
return new core.Point(x,y);
};
core.Utils.calculateDefaultControlPoints = function(srcPos, tarPos){
var y = srcPos.y-tarPos.y;
var x = srcPos.x-tarPos.x;
var m = y/x;
var l = Math.sqrt(y*y+x*x)/3;
var fix=1;
if(srcPos.x>tarPos.x){
fix=-1;
}
var x1 = srcPos.x + Math.sqrt(l*l/(1+(m*m)))*fix;
var y1 = m*(x1-srcPos.x)+srcPos.y;
var x2 = tarPos.x + Math.sqrt(l*l/(1+(m*m)))*fix*-1;
var y2= m*(x2-tarPos.x)+tarPos.y;
return [new core.Point(-srcPos.x + x1,-srcPos.y + y1),new core.Point(-tarPos.x + x2,-tarPos.y + y2)];
};
core.Utils.setVisibilityAnimated = function(elems, isVisible, doneFn){
core.Utils.animateVisibility(elems, isVisible, doneFn);
};
core.Utils.setChildrenVisibilityAnimated = function(rootElem, isVisible){
var children = core.Utils._addInnerChildrens(rootElem);
core.Utils.animateVisibility(children, isVisible);
};
core.Utils.animateVisibility = function (elems, isVisible, doneFn){
var _fadeEffect=null;
var _opacity = (isVisible?0:1);
if(isVisible){
elems.forEach(function(child, index){
child.setOpacity(_opacity);
child.setVisibility(isVisible);
});
}
var fadeEffect = function(index)
{
var step = 10;
if((_opacity<=0 && !isVisible) || (_opacity>=1 && isVisible)){
$clear(_fadeEffect);
_fadeEffect = null;
elems.forEach(function(child, index){
child.setVisibility(isVisible);
});
if(core.Utils.isDefined(doneFn))
doneFn.attempt();
}
else{
var fix = 1;
if(isVisible){
fix = -1;
}
_opacity-=(1/step)*fix;
elems.forEach(function(child, index){
child.setOpacity(_opacity);
});
}
};
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_fadeEffect =fadeEffect.periodical(10);
};
core.Utils._addInnerChildrens = function(elem){
var children = [];
var childs = elem._getChildren();
for(var i = 0 ; i<childs.length; i++){
var child = childs[i];
children.push(child);
children.push(child.getOutgoingLine());
var relationships = child.getRelationships();
children = children.concat(relationships);
var innerChilds = core.Utils._addInnerChildrens(child);
children = children.concat(innerChilds);
}
return children;
};