TiddlyWiki5/js/TiddlerInput.js

242 wiersze
6.7 KiB
JavaScript
Executable File

/*\
title: js/TiddlerInput.js
Functions concerned with parsing representations of tiddlers
\*/
(function(){
/*jslint node: true */
"use strict";
var utils = require("./Utils.js"),
Tiddler = require("./Tiddler.js").Tiddler,
util = require("util");
var tiddlerInput = exports;
/*
Utility function to parse a block of metadata and merge the results into a hashmap of tiddler fields.
The block consists of newline delimited lines consisting of the field name, a colon, and then the value. For example:
title: Safari
modifier: blaine
created: 20110211110700
modified: 20110211131020
tags: browsers issues
creator: psd
*/
var parseMetaDataBlock = function(metaData,fields) {
var result = {};
if(fields) {
for(var t in fields) {
result[t] = fields[t];
}
}
metaData.split("\n").forEach(function(line) {
var p = line.indexOf(":");
if(p !== -1) {
var field = line.substr(0, p).trim();
var value = line.substr(p+1).trim();
result[field] = value;
}
});
return result;
};
/*
Utility function to parse an old-style tiddler DIV. It looks like this:
<div title="Title" creator="JoeBloggs" modifier="JoeBloggs" created="201102111106" modified="201102111310" tags="myTag [[my long tag]]">
<pre>The text of the tiddler (without the expected HTML encoding).
</pre>
</div>
Note that the field attributes are HTML encoded, but that the body of the <PRE> tag is not.
*/
var parseTiddlerDiv = function(text,fields) {
var result = {};
if(fields) {
for(var t in fields) {
result[t] = fields[t];
}
}
var divRegExp = /^\s*<div\s+([^>]*)>((?:.|\n)*)<\/div>\s*$/gi,
subDivRegExp = /^\s*<pre>((?:.|\n)*)<\/pre>\s*$/gi,
attrRegExp = /\s*([^=\s]+)\s*=\s*"([^"]*)"/gi,
match = divRegExp.exec(text);
if(match) {
var subMatch = subDivRegExp.exec(match[2]); // Body of the <DIV> tag
if(subMatch) {
result.text = subMatch[1];
} else {
result.text = match[2];
}
var attrMatch;
do {
attrMatch = attrRegExp.exec(match[1]);
if(attrMatch) {
var name = attrMatch[1];
var value = attrMatch[2];
result[name] = value;
}
} while(attrMatch);
}
return result;
};
var inputTiddlerPlain = function(text,fields) {
fields.text = text;
return [fields];
};
var inputTiddlerJavaScript = function(text,fields) {
var headerCommentRegExp = /^\/\*\\\n((?:^[^\n]*\n)+?)(^\\\*\/$\n?)/mg,
match = headerCommentRegExp.exec(text);
fields.text = text;
if(match) {
fields = parseMetaDataBlock(match[1],fields);
}
return [fields];
};
var inputTiddlerDiv = function(text,fields) {
return [parseTiddlerDiv(text,fields)];
};
var inputTiddler = function(text,fields) {
var split = text.indexOf("\n\n");
if(split !== -1) {
fields.text = text.substr(split + 2);
}
if(split === -1) {
split = text.length;
}
fields = parseMetaDataBlock(text.substr(0,split),fields);
return [fields];
};
var inputTiddlerJSON = function(text,fields) {
var tiddlers = JSON.parse(text),
result = [],
getKnownFields = function(tid) {
var fields = {};
"title text created creator modified modifier type tags".split(" ").forEach(function(value) {
fields[value] = tid[value];
});
return fields;
};
for(var t=0; t<tiddlers.length; t++) {
result.push(getKnownFields(tiddlers[t]));
}
return result;
};
var inputTiddlyWiki = function(text,fields) {
var locateStoreArea = function(tiddlywikidoc) {
var startSaveArea = '<div id="' + 'storeArea">',
startSaveAreaRegExp = /<div id=["']?storeArea['"]?>/gi,
endSaveArea = '</d' + 'iv>',
endSaveAreaCaps = '</D' + 'IV>',
posOpeningDiv = tiddlywikidoc.search(startSaveAreaRegExp),
limitClosingDiv = tiddlywikidoc.indexOf("<"+"!--POST-STOREAREA--"+">");
if(limitClosingDiv == -1) {
limitClosingDiv = tiddlywikidoc.indexOf("<"+"!--POST-BODY-START--"+">");
}
var start = limitClosingDiv == -1 ? tiddlywikidoc.length : limitClosingDiv,
posClosingDiv = tiddlywikidoc.lastIndexOf(endSaveArea,start);
if(posClosingDiv == -1) {
posClosingDiv = tiddlywikidoc.lastIndexOf(endSaveAreaCaps,start);
}
return (posOpeningDiv != -1 && posClosingDiv != -1) ? [posOpeningDiv + startSaveArea.length,posClosingDiv] : null;
},
results = [],
storeAreaPos = locateStoreArea(text);
if(storeAreaPos) {
var endOfDivRegExp = /(<\/div>\s*)/gi,
startPos = storeAreaPos[0];
endOfDivRegExp.lastIndex = startPos;
var match = endOfDivRegExp.exec(text);
while(match && startPos < storeAreaPos[1]) {
var endPos = endOfDivRegExp.lastIndex,
tiddlerFields = parseTiddlerDiv(text.substring(startPos,endPos),fields);
if(tiddlerFields.text !== null) {
tiddlerFields.text = utils.htmlDecode(tiddlerFields.text);
results.push(tiddlerFields);
}
startPos = endPos;
match = endOfDivRegExp.exec(text);
}
}
return results;
};
// Given a reference to a DOM node, return the tiddlers stored in the immediate child nodes
var inputTiddlerDOM = function(node) {
var extractTextTiddler = function(node) {
var e = node.firstChild;
while(e && e.nodeName.toLowerCase() !== "pre") {
e = e.nextSibling;
}
if(e && node.hasAttribute("title")) {
var i,
attrs = node.attributes,
tiddler = {
text: utils.htmlDecode(e.innerHTML)
};
for(i=attrs.length-1; i >= 0; i--) {
if(attrs[i].specified) {
var value = attrs[i].value,
name = attrs[i].name;
if(!Tiddler.isStandardField(name)) {
value = utils.unescapeLineBreaks(value);
}
tiddler[name] = value;
}
}
return tiddler;
} else {
return null;
}
},
extractModuleTiddler = function(node) {
if(node.hasAttribute && node.hasAttribute("data-tiddler-title")) {
var text = node.innerHTML,
s = text.indexOf("{"),
e = text.lastIndexOf("}");
if(s !== -1 && e !== -1) {
text = text.substring(s+1,e-1);
}
return {
title: node.getAttribute("data-tiddler-title"),
text: text,
type: "application/javascript"
};
} else {
return null;
}
},
t,tiddlers = [];
for(t = 0; t < node.childNodes.length; t++) {
var tiddler = extractTextTiddler(node.childNodes[t]);
tiddler = tiddler || extractModuleTiddler(node.childNodes[t]);
if(tiddler) {
tiddlers.push(tiddler);
}
}
return tiddlers;
};
tiddlerInput.register = function(store) {
store.registerTiddlerDeserializer(".txt","text/plain",inputTiddlerPlain);
store.registerTiddlerDeserializer(".js","application/javascript",inputTiddlerJavaScript);
store.registerTiddlerDeserializer(".tiddler","application/x-tiddler-html-div",inputTiddlerDiv);
store.registerTiddlerDeserializer(".tid","application/x-tiddler",inputTiddler);
store.registerTiddlerDeserializer(".json","application/json",inputTiddlerJSON);
store.registerTiddlerDeserializer(".tiddlywiki","application/x-tiddlywiki",inputTiddlyWiki);
store.registerTiddlerDeserializer("(DOM)","(DOM)",inputTiddlerDOM);
};
})();