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json2html.js
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json2html.js
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//Copyright (c) 2016 Crystalline Technologies
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'),
// to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
var json2html = {
/* ---------------------------------------- Public Methods ------------------------------------------------ */
'transform': function(json,transform,_options) {
//create the default output
var out = {'events':[],'html':''};
//default options (by default we don't allow events)
var options = {
'events':false
};
//extend the options
options = json2html._extend(options,_options);
//Make sure we have a transform & json object
if( transform !== undefined || json !== undefined ) {
//Normalize strings to JSON objects if necessary
var obj = typeof json === 'string' ? JSON.parse(json) : json;
//Transform the object (using the options)
out = json2html._transform(obj, transform, options);
}
//determine if we need the events
// otherwise return just the html string
if(options.events) return(out);
else return( out.html );
},
/* ---------------------------------------- Private Methods ------------------------------------------------ */
//Extend options
'_extend':function(obj1,obj2){
var obj3 = {};
for (var attrname in obj1) { obj3[attrname] = obj1[attrname]; }
for (var attrname in obj2) { obj3[attrname] = obj2[attrname]; }
return obj3;
},
//Append results
'_append':function(obj1,obj2) {
var out = {'html':'','event':[]};
if(typeof obj1 !== 'undefined' && typeof obj2 !== 'undefined') {
out.html = obj1.html + obj2.html;
out.events = obj1.events.concat(obj2.events);
}
return(out);
},
//isArray (fix for IE prior to 9)
'_isArray':function(obj) {
return Object.prototype.toString.call(obj) === '[object Array]';
},
//Transform object
'_transform':function(json, transform, options) {
var elements = {'events':[],'html':''};
//Determine the type of this object
if(json2html._isArray(json)) {
//Itterrate through the array and add it to the elements array
var len=json.length;
for(var j=0;j<len;++j) {
//Apply the transform to this object and append it to the results
elements = json2html._append(elements,json2html._apply(json[j], transform, j, options));
}
} else if(typeof json === 'object') {
//Apply the transform to this object and append it to the results
elements = json2html._append(elements,json2html._apply(json, transform, undefined, options));
}
//Return the resulting elements
return(elements);
},
//Apply the transform at the second level
'_apply':function(obj, transform, index, options) {
var element = {'events':[],'html':''};
//Itterate through the transform and create html as needed
if(json2html._isArray(transform)) {
var t_len = transform.length;
for(var t=0; t < t_len; ++t) {
//transform the object and append it to the output
element = json2html._append(element,json2html._apply(obj, transform[t], index, options));
}
} else if(typeof transform === 'object') {
var _element = '<>';
//Add legacy support for tag
if(transform[_element] === undefined) _element = 'tag';
//Check to see if we have a valid element name
if( transform[_element] !== undefined ) {
//Get the element name (this can be tokenized)
var name = json2html._getValue(obj,transform,_element,index);
//Create a new element
element.html += '<' + name;
//Create a new object for the children
var children = {'events':[],'html':''};
//innerHTML
var html;
//Look into the properties of this transform
for (var key in transform) {
switch(key) {
//LEGACY support for tag
case 'tag':
case '<>':
//Do nothing as we have already created the element
break;
//LEGACY support for children
case 'children':
case 'html':
//Get the transform value associated with this key
// added as key could be children or html
var _transform = transform[key];
//Determine what kind of object this is
// array & function => children
// other => html
if(json2html._isArray(_transform)) {
//Apply the transform to the children
children = json2html._append(children,json2html._apply(obj, _transform, index, options));
} else if(typeof _transform === 'function') {
//Get the result from the function
var temp = _transform.call(obj, obj, index);
//Determine what type of object was returned
switch(typeof temp){
//Only returned by json2html.transform or $.json2html calls
case 'object':
//make sure this object is a valid json2html response object
// we ignore all other objects (since we don't know how to represent them in html)
if(temp.html !== undefined && temp.events !== undefined) children = json2html._append(children,temp);
break;
//Not supported
case 'function':
case 'undefined':
break;
//Append to html
// string, number, boolean
default:
children.html += temp;
break;
}
} else {
//Create the html attribute for this element
html = json2html._getValue(obj,transform,key,index);
}
break;
default:
//Add the property as a attribute if it's not a key one
var isEvent = false;
//Check if the first two characters are 'on' then this is an event
if( key.length > 2 )
if(key.substring(0,2).toLowerCase() == 'on') {
//Determine if we should add events
if(options.events) {
//if so then setup the event data
var data = {
'action':transform[key],
'obj':obj,
'data':options.eventData,
'index':index
};
//create a new id for this event
var id = json2html._guid();
//append the new event to this elements events
element.events[element.events.length] = {'id':id,'type':key.substring(2),'data':data};
//Insert temporary event property (json2html-event-id) into the element
element.html += " json2html-event-id-"+key.substring(2)+"='" + id + "'";
}
//this is an event
isEvent = true;
}
//If this wasn't an event AND we actually have a value then add it as a property
if( !isEvent){
//Get the value
var val = json2html._getValue(obj, transform, key, index);
//Make sure we have a value
if(val !== undefined) {
var out;
//Determine the output type of this value (wrap with quotes)
if(typeof val === 'string') out = '"' + val.replace(/"/g, '"') + '"';
else out = val;
//create the name value pair
element.html += ' ' + key + '=' + out;
}
}
break;
}
}
//close the opening element
element.html += '>';
//add the innerHTML (if we have any)
if(html) element.html += html;
//add the children (if we have any)
element = json2html._append(element,children);
//add the closing element
element.html += '</' + name + '>';
}
}
//Return the output object
return(element);
},
//Get a new GUID (used by events)
'_guid':function() {
var S4 = function() {
return (((1+Math.random())*0x10000)|0).toString(16).substring(1);
};
return (S4()+S4()+"-"+S4()+S4()+"-"+S4()+S4());
},
//Get the html value of the object
'_getValue':function(obj, transform, key,index) {
var out = '';
var val = transform[key];
var type = typeof val;
if (type === 'function') {
return(val.call(obj,obj,index));
} else if (type === 'string') {
var _tokenizer = new json2html._tokenizer([
/\$\{([^\}\{]+)\}/
],function( src, real, re ){
return real ? src.replace(re,function(all,name){
//Split the string into it's seperate components
var components = name.split('.');
//Set the object we use to query for this name to be the original object
var useObj = obj;
//Output value
var outVal = '';
//Parse the object components
var c_len = components.length;
for (var i=0;i<c_len;++i) {
if( components[i].length > 0 ) {
var newObj = useObj[components[i]];
useObj = newObj;
if(useObj === null || useObj === undefined) break;
}
}
//As long as we have an object to use then set the out
if(useObj !== null && useObj !== undefined) outVal = useObj;
return(outVal);
}) : src;
});
out = _tokenizer.parse(val).join('');
} else {
out = val;
}
return(out);
},
//Tokenizer
'_tokenizer':function( tokenizers, doBuild ){
if( !(this instanceof json2html._tokenizer ) )
return new json2html._tokenizer( tokenizers, doBuild );
this.tokenizers = tokenizers.splice ? tokenizers : [tokenizers];
if( doBuild )
this.doBuild = doBuild;
this.parse = function( src ){
this.src = src;
this.ended = false;
this.tokens = [ ];
do {
this.next();
} while( !this.ended );
return this.tokens;
};
this.build = function( src, real ){
if( src )
this.tokens.push(
!this.doBuild ? src :
this.doBuild(src,real,this.tkn)
);
};
this.next = function(){
var self = this,
plain;
self.findMin();
plain = self.src.slice(0, self.min);
self.build( plain, false );
self.src = self.src.slice(self.min).replace(self.tkn,function( all ){
self.build(all, true);
return '';
});
if( !self.src )
self.ended = true;
};
this.findMin = function(){
var self = this, i=0, tkn, idx;
self.min = -1;
self.tkn = '';
while(( tkn = self.tokenizers[i++]) !== undefined ){
idx = self.src[tkn.test?'search':'indexOf'](tkn);
if( idx != -1 && (self.min == -1 || idx < self.min )){
self.tkn = tkn;
self.min = idx;
}
}
if( self.min == -1 )
self.min = self.src.length;
};
}
};