mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-08-19 06:06:17 +00:00
155 lines
4.1 KiB
JavaScript
155 lines
4.1 KiB
JavaScript
/*
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Functions concerned with parsing representations of tiddlers
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*/
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var argParser = require("./ArgParser.js"),
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utils = require("./Utils.js");
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var tiddlerInput = exports;
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/*
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Parse a tiddler given its mimetype, and merge the results into a hashmap of tiddler fields.
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A file extension can be passed as a shortcut for the mimetype, as shown in tiddlerUtils.fileExtensionMappings.
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For example ".txt" file extension is mapped to the "text/plain" mimetype.
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Special processing to extract embedded metadata is applied to some mimetypes.
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*/
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tiddlerInput.parseTiddler = function(text,type,fields) {
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if(fields === undefined) {
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var fields = {};
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}
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// Map extensions to mimetpyes
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var fileExtensionMapping = tiddlerInput.fileExtensionMappings[type];
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if(fileExtensionMapping)
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type = fileExtensionMapping;
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// Invoke the parser for the specified mimetype
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var parser = tiddlerInput.parseTiddlerByMimeType[type];
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if(parser) {
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return parser(text,fields);
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}
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return fields;
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}
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tiddlerInput.fileExtensionMappings = {
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".txt": "text/plain",
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".html": "text/html",
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".tiddler": "application/x-tiddler-html-div",
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".tid": "application/x-tiddler",
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".js": "application/javascript"
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}
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tiddlerInput.parseTiddlerByMimeType = {
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"text/plain": function(text,fields) {
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fields.text = text;
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return fields;
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},
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"text/html": function(text,fields) {
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fields.text = text;
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return fields;
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},
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"application/x-tiddler-html-div": function(text,fields) {
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fields = tiddlerInput.parseTiddlerDiv(text,fields);
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return fields;
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},
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"application/x-tiddler": function(text,fields) {
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var split = text.indexOf("\n\n");
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if(split === -1) {
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split = text.length;
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}
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fields = tiddlerInput.parseMetaDataBlock(text.substr(0,split),fields);
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fields.text = text.substr(split + 2);
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return fields;
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},
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"application/javascript": function(text,fields) {
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fields.text = text;
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return fields;
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}
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}
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/*
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Parse a block of metadata and merge the results into a hashmap of tiddler fields.
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The block consists of newline delimited lines consisting of the field name, a colon, and then the value. For example:
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title: Safari
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modifier: blaine
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created: 20110211110700
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modified: 20110211131020
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tags: browsers issues
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creator: psd
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*/
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tiddlerInput.parseMetaDataBlock = function(metaData,fields) {
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if(fields === undefined) {
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var fields = {};
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}
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metaData.split("\n").forEach(function(line) {
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var p = line.indexOf(":");
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if(p !== -1) {
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var field = line.substr(0, p).trim();
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var value = line.substr(p+1).trim();
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fields[field] = tiddlerInput.parseMetaDataItem(field,value);
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}
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});
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return fields;
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}
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/*
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Parse an old-style tiddler DIV. It looks like this:
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<div title="Title" creator="JoeBloggs" modifier="JoeBloggs" created="201102111106" modified="201102111310" tags="myTag [[my long tag]]">
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<pre>The text of the tiddler (without the expected HTML encoding).
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</pre>
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</div>
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Note that the field attributes are HTML encoded, but that the body of the <PRE> tag is not.
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*/
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tiddlerInput.parseTiddlerDiv = function(text,fields) {
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if(fields === undefined) {
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var fields = {};
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}
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var divRegExp = /^\s*<div\s+([^>]*)>((?:.|\n)*)<\/div>\s*$/gi;
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var subDivRegExp = /^(?:\s*<pre>)((?:.|\n)*)(?:<\/pre>\s*)$/gi;
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var attrRegExp = /\s*([^=\s]+)\s*=\s*"([^"]*)"/gi;
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var match = divRegExp.exec(text);
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if(match) {
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var subMatch = subDivRegExp.exec(match[2]); // Body of the <DIV> tag
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if(subMatch) {
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fields.text = subMatch[1];
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} else {
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fields.text = match[2];
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}
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do {
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var attrMatch = attrRegExp.exec(match[1]);
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if(attrMatch) {
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var name = attrMatch[1];
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var value = attrMatch[2];
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fields[name] = tiddlerInput.parseMetaDataItem(name,value);
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}
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} while(attrMatch);
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}
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return fields;
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}
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/*
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Parse a single metadata field/value pair and return the value as the appropriate data type
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*/
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tiddlerInput.parseMetaDataItem = function(field,value) {
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var result;
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switch(field) {
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case "modified":
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case "created":
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result = utils.convertFromYYYYMMDDHHMMSS(value);
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break;
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case "tags":
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var parser = new argParser.ArgParser(value,{noNames: true});
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result = parser.getValuesByName("","");
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break;
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default:
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result = value;
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break;
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}
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return result;
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}
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