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TiddlyWiki5/core/modules/utils/fakedom.js
Jeremy Ruston 551ebdc005 Major refactoring of rendering mechanism
We now use a fake DOM implementation on the server to let us share more
rendering code between the text output vs. DOM output paths.
2013-05-17 10:12:25 +01:00

123 lines
2.5 KiB
JavaScript

/*\
title: $:/core/modules/utils/fakedom.js
type: application/javascript
module-type: global
A barebones implementation of DOM interfaces needed by the rendering mechanism.
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var TW_TextNode = function(text) {
this.textContent = text;
}
var TW_Element = function(tag) {
this.tag = tag;
this.attributes = {};
this.isRaw = false;
this.children = [];
}
TW_Element.prototype.setAttribute = function(name,value) {
if(this.isRaw) {
throw "Cannot setAttribute on a raw TW_Element";
}
this.attributes[name] = value;
};
TW_Element.prototype.setAttributeNS = function(namespace,name,value) {
this.setAttribute(name,value);
};
TW_Element.prototype.appendChild = function(node) {
this.children.push(node);
node.parentNode = this;
};
TW_Element.prototype.addEventListener = function(type,listener,useCapture) {
// Do nothing
};
Object.defineProperty(TW_Element.prototype, "outerHTML", {
get: function() {
var output = [],attr,a,v;
output.push("<",this.tag);
if(this.attributes) {
attr = [];
for(a in this.attributes) {
attr.push(a);
}
attr.sort();
for(a=0; a<attr.length; a++) {
v = this.attributes[attr[a]];
if(v !== undefined) {
output.push(" ",attr[a],"='",$tw.utils.htmlEncode(v),"'");
}
}
}
output.push(">\n");
if($tw.config.htmlVoidElements.indexOf(this.tag) === -1) {
output.push(this.innerHTML);
output.push("</",this.tag,">");
}
return output.join("");
}
});
Object.defineProperty(TW_Element.prototype, "innerHTML", {
get: function() {
if(this.isRaw) {
return this.rawHTML;
} else {
var b = [];
$tw.utils.each(this.children,function(node) {
if(node instanceof TW_Element) {
b.push(node.outerHTML);
} else if(node instanceof TW_TextNode) {
b.push($tw.utils.htmlEncode(node.textContent));
}
});
return b.join("");
}
},
set: function(value) {
this.isRaw = true;
this.rawHTML = value;
}
});
Object.defineProperty(TW_Element.prototype, "textContent", {
get: function() {
if(this.isRaw) {
throw "Cannot get textContent on a raw TW_Element";
} else {
var b = [];
$tw.utils.each(this.children,function(node) {
b.push(node.textContent);
});
return b.join("");
}
}
});
var document = {
createElementNS: function(namespace,tag) {
return new TW_Element(tag);
},
createElement: function(tag) {
return new TW_Element(tag);
},
createTextNode: function(text) {
return new TW_TextNode(text);
},
};
exports.document = document;
})();