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/**
* Template provides directions an how to bind to a given element.
* It contains a list of init functions which need to be called to
* bind to a new instance of elements. It also provides a list
* of child paths which contain child templates
*/
function Template() {
this.paths = [];
this.children = [];
this.inits = [];
}
Template.prototype = {
init: function(element, scope) {
element = jqLite(element);
foreach(this.inits, function(fn) {
scope.$tryEval(fn, element, element);
});
var i,
childNodes = element[0].childNodes,
children = this.children,
paths = this.paths,
length = paths.length;
for (i = 0; i < length; i++) {
children[i].init(childNodes[paths[i]], scope);
}
},
addInit:function(init) {
if (init) {
this.inits.push(init);
}
},
addChild: function(index, template) {
if (template) {
this.paths.push(index);
this.children.push(template);
}
},
empty: function() {
return this.inits.length == 0 && this.paths.length == 0;
}
};
///////////////////////////////////
//Compiler
//////////////////////////////////
function isTextNode(node) {
return node.nodeType == Node.TEXT_NODE;
}
function eachTextNode(element, fn){
var i, chldNodes = element[0].childNodes || [], size = chldNodes.length, chld;
for (i = 0; i < size; i++) {
if(isTextNode(chld = chldNodes[i])) {
fn(jqLite(chld), i);
}
}
}
function eachNode(element, fn){
var i, chldNodes = element[0].childNodes || [], size = chldNodes.length, chld;
for (i = 0; i < size; i++) {
if(!isTextNode(chld = chldNodes[i])) {
fn(jqLite(chld), i);
}
}
}
function eachAttribute(element, fn){
var i, attrs = element[0].attributes || [], size = attrs.length, chld, attr;
for (i = 0; i < size; i++) {
var attr = attrs[i];
fn(attr.name, attr.value);
}
}
function Compiler(textMarkup, attrMarkup, directives, widgets){
this.textMarkup = textMarkup;
this.attrMarkup = attrMarkup;
this.directives = directives;
this.widgets = widgets;
}
Compiler.prototype = {
compile: function(rawElement) {
rawElement = jqLite(rawElement);
var template = this.templatize(rawElement) || new Template();
return function(element, parentScope){
var model = scope(parentScope);
return extend(model, {
$element:element,
$init: bind(template, template.init, element, model)
});
};
},
templatize: function(element){
var self = this,
widget = self.widgets[element[0].nodeName],
directives = self.directives,
descend = true,
exclusive = false,
directiveQueue = [],
template = new Template(),
selfApi = {
compile: bind(self, self.compile),
comment:function(text) {return jqLite(document.createComment(text));},
element:function(type) {return jqLite(document.createElement(type));},
text:function(text) {return jqLite(document.createTextNode(text));},
descend: function(value){ if(isDefined(value)) descend = value; return descend;}
};
if (widget) {
descend = false;
template.addInit(widget.call(selfApi, element));
} else {
// process markup for text nodes only
eachTextNode(element, function(textNode){
var text = textNode.text();
foreach(self.textMarkup, function(markup){
markup.call(selfApi, text, textNode, element);
});
});
// Process attributes/directives
eachAttribute(element, function(name, value){
foreach(self.attrMarkup, function(markup){
markup.call(selfApi, value, name, element);
});
});
eachAttribute(element, function(name, value){
var directive = directives[name];
if (!exclusive && directive) {
if (directive.exclusive) {
exclusive = true;
directiveQueue = [];
}
directiveQueue.push(bind(selfApi, directive, value, element));
}
});
// Execute directives
foreach(directiveQueue, function(directive){
template.addInit(directive());
});
}
// Process non text child nodes
if (descend) {
eachNode(element, function(child, i){
template.addChild(i, self.templatize(child));
});
}
return template.empty() ? null : template;
}
};
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