rdbms.html | searchcode

/lib/rdbms/doc/rdbms.html

http://github.com/gebi/jungerl
HTML | 4272 lines | 4045 code | 194 blank | 33 comment | 0 complexity | 717ff9ac828a9d56723462f69c458b51 MD5 | raw file
Possible License(s): AGPL-1.0, JSON, LGPL-2.1, BSD-3-Clause

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<script type="text/javascript">
var version = {major: 1, minor: 2, revision: 32, date: new Date("Aug 18, 2005"), extensions: {}};
</script>
<!--
TiddlyWiki 1.2.32 by Jeremy Ruston, (jeremy [at] osmosoft [dot] com)

Published under a BSD open source license
Incorporating improvements by Isao Sonobe, http://www-gauge.scphys.kyoto-u.ac.jp/~sonobe/OgreKit/OgreKitWiki.html

Copyright (c) Osmosoft Limited, 14 April 2005

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.

Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or other
materials provided with the distribution.

Neither the name of the Osmosoft Limited nor the names of its contributors may be
used to endorse or promote products derived from this software without specific
prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
-->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" >
<title>RDBMS</title>
<script type="text/javascript">

// ---------------------------------------------------------------------------------
// Configuration repository
// ---------------------------------------------------------------------------------

var config = {
	// Options that can be set in the options panel and/or cookies
	options: {
		chkRegExpSearch: false,
		chkCaseSensitiveSearch: false,
		chkAnimate: true,
		txtUserName: "YourName",
		chkSaveBackups: true,
		chkAutoSave: false,
		chkGenerateAnRssFeed: false,
		chkSaveEmptyTemplate: false,
		chkOpenInNewWindow: true,
		chkToggleLinks: false,
		chkHttpReadOnly: false,
		txtMainTab: "tabTimeline",
		txtMoreTab: "moreTabAll"
		},
	// Hashmap of notification functions to be called when certain tiddlers are changed or deleted
	notifyNamedTiddlers: {
		SiteTitle: refreshTitle,
		SiteSubtitle: refreshSubtitle,
		SideBarOptions: refreshSidebar,
		StyleSheet: refreshStyles
		},
	// List of notification functions to be called when any tiddler is changed or deleted
	notifyTiddlers: [
		refreshMenu,
		refreshStory,
		refreshTabs
		],
	// Shadow tiddlers for emergencies
	shadowTiddlers: {
		SideBarOptions: "<<search>><<closeAll>><<permaview>><<saveChanges>><<slider chkSliderOptionsPanel OptionsPanel options 'Change TiddlyWiki advanced options'>>",
		OptionsPanel: "These InterfaceOptions for customising TiddlyWiki are saved in your browser\n\nYour username for signing your edits. Write it as a WikiWord (eg JoeBloggs)\n\n<<option txtUserName>>\n<<option chkSaveBackups>> SaveBackups\n<<option chkAutoSave>> AutoSave\n<<option chkGenerateAnRssFeed>> GenerateAnRssFeed\n<<option chkRegExpSearch>> RegExpSearch\n<<option chkCaseSensitiveSearch>> CaseSensitiveSearch\n<<option chkAnimate>> EnableAnimations\n\nSee AdvancedOptions",
		AdvancedOptions: "<<option chkOpenInNewWindow>> OpenLinksInNewWindow\n<<option chkSaveEmptyTemplate>> SaveEmptyTemplate\n<<option chkToggleLinks>> Clicking on links to tiddlers that are already open causes them to close\n^^(override with Control or other modifier key)^^\n<<option chkHttpReadOnly>> HideEditingFeatures when viewed over HTTP",
		SideBarTabs: "<<tabs txtMainTab Timeline Timeline TabTimeline All 'All tiddlers' TabAll Tags 'All tags' TabTags More 'More lists' TabMore>>",
		TabTimeline: "<<timeline>>",
		TabAll: "<<list all>>",
		TabTags: "<<allTags>>",
		TabMore: "<<tabs txtMoreTab Missing 'Missing tiddlers' TabMoreMissing Orphans 'Orphaned tiddlers' TabMoreOrphans>>",
		TabMoreMissing: "<<list missing>>",
		TabMoreOrphans: "<<list orphans>>"
		},
	// Miscellaneous options
	numRssItems: 20, // Number of items in the RSS feed
	animFast: 0.12, // Speed for animations (lower == slower)
	animSlow: 0.01, // Speed for EasterEgg animations
	// Messages
	messages: {
		customConfigError: "Error in customConfig - %0",
		savedSnapshotError: "It appears that this TiddlyWiki has been incorrectly saved. Please see http://www.tiddlywiki.com/#DownloadSoftware for details",
		subtitleUnknown: "(unknown)",
		undefinedTiddlerToolTip: "The tiddler '%0' doesn't yet exist",
		externalLinkTooltip: "External link to %0",
		noTags: "There are no tagged tiddlers",
		notFileUrlError: "You need to save this TiddlyWiki to a file before you can save changes",
		cantSaveError: "It's not possible to save changes using this browser. Use FireFox if you can",
		invalidFileError: "The original file '%0' does not appear to be a valid TiddlyWiki",
		backupSaved: "Backup saved",
		backupFailed: "Failed to save backup file",
		rssSaved: "RSS feed saved",
		rssFailed: "Failed to save RSS feed file",
		emptySaved: "Empty template saved",
		emptyFailed: "Failed to save empty template file",
		mainSaved: "Main TiddlyWiki file saved",
		mainFailed: "Failed to save main TiddlyWiki file. Your changes have not been saved",
		macroError: "Error executing macro '%0'",
		overwriteWarning: "A tiddler named '%0' already exists. Choose OK to overwrite it",
		unsavedChangesWarning: "WARNING! There are unsaved changes in TiddlyWiki\n\nChoose OK to save\nChoose CANCEL to discard",
		dates: {
			months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November","December"],
			days: ["Sunday", "Monday","Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]
			}
		},
	views: {
		wikified: {
			tag: {labelNoTags: "no tags", labelTags: "tags: ", tooltip: "Show tiddlers tagged with '%0'", openAllText: "Open all", openAllTooltip: "Open all of these tiddlers", popupNone: "No other tiddlers tagged with '%0'"},
			toolbarClose: {text: "close", tooltip: "Close this tiddler"},
			toolbarEdit: {text: "edit", tooltip: "Edit this tiddler"},
			toolbarPermalink: {text: "permalink", tooltip: "Permalink for this tiddler"},
			toolbarReferences: {text: "references", tooltip: "Show tiddlers that link to this one", popupNone: "No references"},
			defaultText: "The tiddler '%0' doesn't yet exist. Double-click to create it"
			},
		editor: {
			tagPrompt: "Type tags separated with spaces, [[use double square brackets]] if necessary, or add existing",
			tagChooser: {text: "tags", tooltip: "Choose existing tags to add to this tiddler", popupNone: "There are no tags defined", tagTooltip: "Add the tag '%0'"},
			toolbarDone: {text: "done", tooltip: "Save changes to this tiddler"},
			toolbarCancel: {text: "cancel", tooltip: "Undo changes to this tiddler"},
			toolbarDelete: {text: "delete", tooltip: "Delete this tiddler"},
			defaultText: "Type the text for '%0'"
			}
		},
	macros: { // Each has a 'handler' member that is inserted later
		today: {},
		version: {},
		search: {label: "search", prompt: "Search this TiddlyWiki", sizeTextbox: 15, successMsg: "%0 tiddlers found matching %1", failureMsg: "No tiddlers found matching %0"},
		tiddler: {},
		tag: {},
		timeline: {dateFormat: "DD MMM YYYY"},
		allTags: {tooltip: "Show tiddlers tagged with '%0'", noTags: "There are no tagged tiddlers"},
		list: {
			all: {prompt: "All tiddlers in alphabetical order"},
			missing: {prompt: "Tiddlers that have links to them but are not defined"},
			orphans: {prompt: "Tiddlers that are not linked to from any other tiddlers"}
			},
		closeAll: {label: "close all", prompt: "Close all displayed tiddlers (except any that are being edited)"},
		permaview: {label: "permaview", prompt: "Link to an URL that retrieves all the currently displayed tiddlers"},
		saveChanges: {label: "save changes", prompt: "Save all tiddlers to create a new TiddlyWiki"},
		slider: {},
		option: {},
		newTiddler: {label: "new tiddler", prompt: "Create a new tiddler", title: "New Tiddler"},
		newJournal: {label: "new journal", prompt: "Create a new tiddler from the current date and time"},
		sparkline: {},
		tabs: {}
		}
};

// ---------------------------------------------------------------------------------
// Main
// ---------------------------------------------------------------------------------

// TiddlyWiki storage
var store = new TiddlyWiki();

// Animation engine
var anim = new Animator();

var readOnly = false;

// Starting up
function main()
{
	setupRegexp();
	saveTest();
	loadOptionsCookie();
	var s;
	for(s in config.notifyNamedTiddlers)
		store.addNotification(s,config.notifyNamedTiddlers[s]);
	for(s=0; s<config.notifyTiddlers.length; s++)
		store.addNotification(null,config.notifyTiddlers[s]);
	store.loadFromDiv("storeArea","store");
	loadSystemConfig();
	readOnly = (document.location.toString().substr(0,7) == "http://") ? config.options.chkHttpReadOnly : false;
	store.notifyAll();
	var start = store.getTiddlerText("DefaultTiddlers");
	if(window.location.hash)
		displayTiddlers(null,convertUTF8ToUnicode(decodeURI(window.location.hash.substr(1))),1,null,null);
	else if(start)
		displayTiddlers(null,start,1,null,null);
}

function saveTest()
{
	var saveTest = document.getElementById("saveTest");
	if(saveTest.hasChildNodes())
		alert(config.messages.savedSnapshotError);
	saveTest.appendChild(document.createTextNode("savetest"));
}

function loadSystemConfig()
{
	var configTiddlers = store.getTaggedTiddlers("systemConfig");
	for(var t=0; t<configTiddlers.length; t++)
		{
		var ex = processConfig(configTiddlers[t].text);
		if(ex)
			displayMessage(config.messages.customConfigError.format([ex]));
		}
}

// ---------------------------------------------------------------------------------
// Macro definitions
// ---------------------------------------------------------------------------------

config.macros.today.handler = function(place)
{
	createTiddlyElement(place,"span",null,null,(new Date()).toLocaleString());
}

config.macros.version.handler = function(place)
{
	createTiddlyElement(place,"span",null,null,version.major + "." + version.minor + "." + version.revision);
}

config.macros.list.handler = function(place,macroName,params)
{
	var type = params[0] ? params[0] : "all";
	var theList = document.createElement("ul");
	place.appendChild(theList);
	if(this[type].prompt)
		createTiddlyElement(theList,"li",null,"listTitle",this[type].prompt);
	var results;
	if(this[type].handler)
		results = this[type].handler(params);
	for (t = 0; t < results.length; t++)
		{
		theListItem = document.createElement("li")
		theList.appendChild(theListItem);
		if(typeof results[t] == "string")
			createTiddlyLink(theListItem,results[t],true);
		else
			createTiddlyLink(theListItem,results[t].title,true);
		}
}

config.macros.list.all.handler = function(params)
{
	return store.reverseLookup("tags","excludeLists",false,"title");
}

config.macros.list.missing.handler = function(params)
{
	return store.getMissingLinks();
}

config.macros.list.orphans.handler = function(params)
{
	return store.getOrphans();
}

config.macros.allTags.handler = function(place,macroName,params)
{
	var tags = store.getTags();
	var theDateList = createTiddlyElement(place,"ul",null,null,null);
	if(tags.length == 0)
		createTiddlyElement(theDateList,"li",null,"listTitle",this.noTags);
	for (t=0; t<tags.length; t++)
		{
		var theListItem =createTiddlyElement(theDateList,"li",null,null,null);
		var theTag = createTiddlyButton(theListItem,tags[t][0] + " (" + tags[t][1] + ")",this.tooltip.format([tags[t][0]]),onClickTag);
		theTag.setAttribute("tag",tags[t][0]);
		}
}

config.macros.timeline.handler = function(place,macroName,params)
{
	var tiddlers = store.reverseLookup("tags","excludeLists",false,"modified");
	var lastDay = "";
	for (t=tiddlers.length-1; t>=0; t--)
		{
		var tiddler = tiddlers[t];
		var theDay = tiddler.modified.convertToYYYYMMDDHHMM().substr(0,8);
		if(theDay != lastDay)
			{
			var theDateList = document.createElement("ul");
			place.appendChild(theDateList);
			createTiddlyElement(theDateList,"li",null,"listTitle",tiddler.modified.formatString(this.dateFormat));
			lastDay = theDay;
			}
		var theDateListItem = createTiddlyElement(theDateList,"li",null,"listLink",null);
		theDateListItem.appendChild(createTiddlyLink(place,tiddler.title,true));
		}
}

config.macros.search.handler = function(place,macroName,params)
{
	var lastSearchText = "";
	var searchTimeout = null;
	var doSearch = function(txt)
		{
		closeAllTiddlers();
		var matches = store.search(txt.value,config.options.chkCaseSensitiveSearch,config.options.chkRegExpSearch,"title","excludeSearch");
		for(var t=matches.length-1; t>=0; t--)
			displayTiddler(null,matches[t].title,0,txt.value,config.options.chkCaseSensitiveSearch,false,false);
		var q = config.options.chkRegExpSearch ? "/" : "'";
		if(matches.length > 0)
			displayMessage(config.macros.search.successMsg.format([matches.length.toString(),q + txt.value + q]));
		else
			displayMessage(config.macros.search.failureMsg.format([q + txt.value + q]));
		lastSearchText = txt.value;
		};
	var clickHandler = function(e)
		{
		doSearch(this.nextSibling);
		};
	var keyHandler = function(e)
		{
		if (!e) var e = window.event;
		switch(e.keyCode)
			{
			case 27:
				this.value = "";
				clearMessage();
				break;
			}
		if((this.value.length > 2) && (this.value != lastSearchText))
			{
			if(searchTimeout)
				clearTimeout(searchTimeout);
			var txt = this;
			searchTimeout = setTimeout(function() {doSearch(txt);},200);
			}
		};
	var focusHandler = function(e)
		{
		this.select();
		};
	var btn = createTiddlyButton(place,this.label,this.prompt,clickHandler);
	var txt = createTiddlyElement(place,"input",null,null,null);
	if(params[0])
		txt.value = params[0];
	txt.onkeyup = keyHandler;
	txt.onfocus = focusHandler;
	txt.setAttribute("size",this.sizeTextbox);
	txt.setAttribute("autocomplete","off");
	if(navigator.userAgent.toLowerCase().indexOf("safari") == -1)
		txt.setAttribute("type","text");
	else
		{
		txt.setAttribute("type","search");
		txt.setAttribute("results","5");
		}
}

config.macros.tiddler.handler = function(place,macroName,params)
{
	var wrapper = createTiddlyElement(place,"span",null,params[1] ? params[1] : null,null);
	var text = store.getTiddlerText(params[0]);
	if(text)
		wikify(text,wrapper,null,null);
}

config.macros.tag.handler = function(place,macroName,params)
{
	createTagButton(place,params[0]);
}

config.macros.closeAll.handler = function(place)
{
	createTiddlyButton(place,this.label,this.prompt,closeAllTiddlers);
}

config.macros.permaview.handler = function(place)
{
	createTiddlyButton(place,this.label,this.prompt,onClickPermaView);
}

config.macros.saveChanges.handler = function(place)
{
	if(!readOnly)
		createTiddlyButton(place,this.label,this.prompt,saveChanges);
}

config.macros.slider.onClickSlider = function(e)
{
	if (!e) var e = window.event;
	var n = this.nextSibling;
	var cookie = n.getAttribute("cookie");
	var isOpen = n.style.display != "none";
	if(config.options.chkAnimate)
		anim.startAnimating(new Slider(n,!isOpen,e.shiftKey || e.altKey,"none"));
	else
		n.style.display = isOpen ? "none" : "block";
	config.options[cookie] = !isOpen;
	saveOptionCookie(cookie);
}

config.macros.slider.handler = function(place,macroName,params)
{
	var cookie = params[0] ? params[0] : "";
	var text = store.getTiddlerText(params[1]);
	var btn = createTiddlyButton(place,params[2],params[3],this.onClickSlider);
	var panel = createTiddlyElement(place,"div",null,"sliderPanel",null);
	panel.setAttribute("cookie",cookie);
	panel.style.display = config.options[cookie] ? "block" : "none";
	if(text)
		wikify(text,panel,null,null);
}

config.macros.option.onChangeOption = function(e)
{
	var opt = this.getAttribute("option");
	var elementType,valueField;
	if(opt)
		{
		switch(opt.substr(0,3))
			{
			case "txt":
				elementType = "input";
				valueField = "value";
				break;
			case "chk":
				elementType = "input";
				valueField = "checked";
				break;
			}
		config.options[opt] = this[valueField];
		saveOptionCookie(opt);
		var nodes = document.getElementsByTagName(elementType);
		for(var t=0; t<nodes.length; t++)
			{
			var optNode = nodes[t].getAttribute("option");
			if(opt == optNode)
				nodes[t][valueField] = this[valueField];
			}
		}
	return(true);
}

config.macros.option.handler = function(place,macroName,params)
{
	var opt = params[0];
	if(config.options[opt] == undefined)
		return;
	var c;
	switch(opt.substr(0,3))
		{
		case "txt":
			c = document.createElement("input");
			c.onkeyup = this.onChangeOption;
			c.setAttribute("option",opt);
			c.size = 15;
			c.value = config.options[opt];
			place.appendChild(c);
			break;
		case "chk":
			c = document.createElement("input");
			c.setAttribute("type","checkbox");
			c.onclick = this.onChangeOption;
			c.setAttribute("option",opt);
			c.checked = config.options[opt];
			place.appendChild(c);
			break;
		}
}

config.macros.newTiddler.onClick = function()
{
	displayTiddler(null,config.macros.newTiddler.title,2,null,null,false,false);
	var e = document.getElementById("editorTitle" + config.macros.newTiddler.title);
	e.focus();
	e.select();
}

config.macros.newTiddler.handler = function(place)
{
	if(!readOnly)
		createTiddlyButton(place,this.label,this.prompt,this.onClick);
}

config.macros.newJournal.handler = function(place,macroName,params)
{
	if(!readOnly)
		{
		var now = new Date();
		var title = now.formatString(params[0].trim());
		var createJournal = function() {
			displayTiddler(null,title,2,null,null,false,false);
			var tagsBox = document.getElementById("editorTags" + title);
			if(tagsBox && params[1])
				tagsBox.value += " " + String.encodeTiddlyLink(params[1]);
			};
		createTiddlyButton(place,this.label,this.prompt,createJournal);
		}
}

config.macros.sparkline.handler = function(place,macroName,params)
{
	var data = [];
	var min = 0;
	var max = 0;
	for(var t=0; t<params.length; t++)
		{
		var v = parseInt(params[t]);
		if(v < min)
			min = v;
		if(v > max)
			max = v;
		data.push(v);
		}
	if(data.length < 1)
		return;
	var box = createTiddlyElement(place,"span",null,"sparkline",String.fromCharCode(160));
	box.title = data.join(",");
	var w = box.offsetWidth;
	var h = box.offsetHeight;
	box.style.paddingRight = (data.length * 2 - w) + "px";
	box.style.position = "relative";
	for(var d=0; d<data.length; d++)
		{
		var tick = document.createElement("img");
		tick.border = 0;
		tick.className = "sparktick";
		tick.style.position = "absolute";
		tick.src = "data:image/gif,GIF89a%01%00%01%00%91%FF%00%FF%FF%FF%00%00%00%C0%C0%C0%00%00%00!%F9%04%01%00%00%02%00%2C%00%00%00%00%01%00%01%00%40%02%02T%01%00%3B";
		tick.style.left = d*2 + "px";
		tick.style.width = "2px";
		var v = Math.floor(((data[d] - min)/(max-min)) * h);
		tick.style.top = (h-v) + "px";
		tick.style.height = v + "px";
		box.appendChild(tick);
		}
}

config.macros.tabs.handler = function(place,macroName,params)
{
	var cookie = params[0];
	var numTabs = (params.length-1)/3;
	var wrapper = createTiddlyElement(place,"div",null,cookie,null);
	var tabset = createTiddlyElement(wrapper,"div",null,"tabset",null);
	tabset.setAttribute("cookie",cookie);
	var validTab = false;
	for(var t=0; t<numTabs; t++)
		{
		var label = params[t*3+1];
		var prompt = params[t*3+2];
		var content = params[t*3+3];
		var tab = createTiddlyButton(tabset,label,prompt,this.onClickTab,"tab tabUnselected");
		tab.setAttribute("href","javascript:;");
		tab.onclick = this.onClickTab;
		tab.setAttribute("tab",label);
		tab.setAttribute("content",content);
		tab.title = prompt;
		if(config.options[cookie] == label)
			validTab = true;
		}
	if(!validTab)
		config.options[cookie] = params[1];
	this.switchTab(tabset,config.options[cookie]);
}

config.macros.tabs.onClickTab = function(e)
{
	config.macros.tabs.switchTab(this.parentNode,this.getAttribute("tab"));
}

config.macros.tabs.switchTab = function(tabset,tab)
{
	var cookie = tabset.getAttribute("cookie");
	var theTab = null
	var nodes = tabset.childNodes;
	for(var t=0; t<nodes.length; t++)
		if(nodes[t].getAttribute && nodes[t].getAttribute("tab") == tab)
			{
			theTab = nodes[t];
			theTab.className = "tab tabSelected";
			}
		else
			nodes[t].className = "tab tabUnselected"
	if(theTab)
		{
		if(tabset.nextSibling && tabset.nextSibling.className == "tabContents")
			tabset.parentNode.removeChild(tabset.nextSibling);
		var tabContent = createTiddlyElement(null,"div",null,"tabContents",null);
		tabset.parentNode.insertBefore(tabContent,tabset.nextSibling);
		wikify(store.getTiddlerText(theTab.getAttribute("content")),tabContent,null,null);
		if(cookie)
			{
			config.options[cookie] = tab;
			saveOptionCookie(cookie);
			}
		}
}

// ---------------------------------------------------------------------------------
// Config and macro stuff
// ---------------------------------------------------------------------------------

// Merge a custom configuration over the top of the current configuration
// Returns a string error message or null if it went OK
function processConfig(customConfig)
{
	try
		{
		if(customConfig && customConfig != "")
			window.eval(customConfig);
		}
	catch(e)
		{
		return(e.toString());
		}
	return null;
}

// Render a macro
function insertMacro(place,macroName,macroParams)
{
	var params = macroParams.readMacroParams();
	try
		{
		var macro = config.macros[macroName];
		if(macro && macro.handler)
			macro.handler(place,macroName,params);
		else
			createTiddlyElement(place,"span",null,"errorNoSuchMacro","<<" + macroName + ">>");
		}
	catch(e)
		{
		displayMessage(config.messages.macroError.format([macroName]));
		displayMessage(e.toString());
		}
}

// ---------------------------------------------------------------------------------
// Tiddler() object
// ---------------------------------------------------------------------------------

function Tiddler()
{
	this.title = null;
	this.text = null;
	this.modifier = null;
	this.modified = new Date();
	this.links = [];
	this.tags = [];
	return this;
}

// Load a tiddler from an HTML DIV
Tiddler.prototype.loadFromDiv = function(divRef,title)
{
	var text = Tiddler.unescapeLineBreaks(divRef.firstChild ? divRef.firstChild.nodeValue : "");
	var modifier = divRef.getAttribute("modifier");
	var modified = Date.convertFromYYYYMMDDHHMM(divRef.getAttribute("modified"));
	var tags = divRef.getAttribute("tags");
	this.set(title,text,modifier,modified,tags);
	return this;
}

// Format the text for storage in an HTML DIV
Tiddler.prototype.saveToDiv = function()
{
	return '<div tiddler="' + this.title + '" modified="' +
							this.modified.convertToYYYYMMDDHHMM() + '" modifier="' + this.modifier +
							'" tags="' + this.getTags() + '">' +
							this.escapeLineBreaks().htmlEncode() + '</div>';
}

// Format the text for storage in an RSS item
Tiddler.prototype.saveToRss = function(url)
{
	var s = [];
	s.push("<item>");
	s.push("<title>" + this.title.htmlEncode() + "</title>");
	s.push("<description>" + this.text.replace(regexpNewLine,"<br />").htmlEncode() + "</description>");
	for(var t=0; t<this.tags.length; t++)
		s.push("<category>" + this.tags[t] + "</category>");
	s.push("<link>" + url + "#" + encodeURIComponent(String.encodeTiddlyLink(this.title)) + "</link>");
	s.push("<pubDate>" + this.modified.toGMTString() + "</pubDate>");
	s.push("</item>");
	return(s.join("\n"));
}

// Change the text and other attributes of a tiddler
Tiddler.prototype.set = function(title,text,modifier,modified,tags)
{
	if(title != undefined)
		this.title = title;
	if(text != undefined)
		this.text = text;
	if(modifier != undefined)
		this.modifier = modifier;
	if(modified != undefined)
		this.modified = modified;
	if(tags != undefined)
		this.tags = (typeof tags == "string") ? tags.readBracketedList() : tags;
	else
		this.tags = [];
	this.changed();
	return this;
}

// Get the tags for a tiddler as a string (space delimited, using [[brackets]] for tags containing spaces)
Tiddler.prototype.getTags = function()
{
	if(this.tags)
		{
		var results = [];
		for(var t=0; t<this.tags.length; t++)
			results.push(String.encodeTiddlyLink(this.tags[t]));
		return results.join(" ");
		}
	else
		return "";
}

var regexpBackSlashEn = new RegExp("\\\\n","mg");
var regexpBackSlash = new RegExp("\\\\","mg");
var regexpBackSlashEss = new RegExp("\\\\s","mg");
var regexpNewLine = new RegExp("\n","mg");
var regexpCarriageReturn = new RegExp("\r","mg");

// Static method to Convert "\n" to newlines, "\s" to "\"
Tiddler.unescapeLineBreaks = function(text)
{
	if(text && text != "")
		return text.replace(regexpBackSlashEn,"\n").replace(regexpBackSlashEss,"\\").replace(regexpCarriageReturn,"");
	else
		return "";
}

// Convert newlines to "\n", "\" to "\s"
Tiddler.prototype.escapeLineBreaks = function()
{
	return this.text.replace(regexpBackSlash,"\\s").replace(regexpNewLine,"\\n").replace(regexpCarriageReturn,"");
}

// Updates the secondary information (like links[] array) after a change to a tiddler
Tiddler.prototype.changed = function()
{
	this.links = [];
	var nextPos = 0;
	var theLink;
	do {
		var formatMatch = wikiNameRegExp.exec(this.text);
		if(formatMatch)
			{
			if(!formatMatch[1] && formatMatch[2] && formatMatch[2] != this.title)
				this.links.pushUnique(formatMatch[2]);
			else if(formatMatch[4] && store.tiddlers[formatMatch[5]] != undefined)
				this.links.pushUnique(formatMatch[5]);
			else if(formatMatch[6] && formatMatch[6] != this.title)
				this.links.pushUnique(formatMatch[6]);
			}
	} while(formatMatch);
	return;
}

Tiddler.prototype.getSubtitle = function()
{
	var theModifier = this.modifier;
	if(!theModifier)
		theModifier = config.messages.subtitleUnknown;
	var theModified = this.modified;
	if(theModified)
		theModified = theModified.toLocaleString();
	else
		theModified = config.messages.subtitleUnknown;
	return(theModifier + ", " + theModified);
}

// ---------------------------------------------------------------------------------
// TiddlyWiki() object contains Tiddler()s
// ---------------------------------------------------------------------------------

function TiddlyWiki()
{
	this.tiddlers = {}; // Hashmap by name of tiddlers
	this.namedNotifications = {}; // Hashmap by name of array of notification functions
	this.blanketNotifications = []; // Array of blanket notifications to be invoked on any change
	this.dirty = false;
}

// Set the dirty flag
TiddlyWiki.prototype.setDirty = function(dirty)
{
	this.dirty = dirty;
}

// Invoke the notification handlers for a particular tiddler
TiddlyWiki.prototype.notify = function(title,doBlanket)
{
	var notification = this.namedNotifications[title];
	if(notification)
		for(var t=0; t<notification.length; t++)
			notification[t](title);
	if(doBlanket)
		for(var n=0; n<this.blanketNotifications.length; n++)
			this.blanketNotifications[n](title);
}

// Invoke the notification handlers for all tiddlers
TiddlyWiki.prototype.notifyAll = function()
{
	var notifyTitle;
	for(notifyTitle in this.tiddlers)
		this.notify(notifyTitle,false);
	for(notifyTitle in config.shadowTiddlers)
		if(this.tiddlers[notifyTitle] == undefined)
			this.notify(notifyTitle,false);
	for(var n=0; n<this.blanketNotifications.length; n++)
		this.blanketNotifications[n]();
}

// Add a notification handler to a tiddler
TiddlyWiki.prototype.addNotification = function(title,fn)
{
	var notification;
	if(title)
		{
		notification = this.namedNotifications[title];
		if(!notification)
			{
			notification = [];
			this.namedNotifications[title] = notification;
			}
		}
	else
		notification = this.blanketNotifications;
	notification.push(fn);
	return this;
}

// Clear a TiddlyWiki so that it contains no tiddlers
TiddlyWiki.prototype.clear = function(src)
{
	this.tiddlers = {};
	this.dirty = false;
}

TiddlyWiki.prototype.removeTiddler = function(title)
{
	var tiddler = this.tiddlers[title];
	if(tiddler)
		{
		delete this.tiddlers[title];
		this.notify(title,true);
		this.dirty = true;
		}
}

TiddlyWiki.prototype.getTiddlerText = function(title,defaultText)
{
	if(!title)
		return(defaultText);
	var tiddler = this.tiddlers[title];
	if(tiddler)
		return tiddler.text;
	else if(config.shadowTiddlers[title])
		return config.shadowTiddlers[title];
	else if(defaultText)
		return defaultText;
	else
		return null;
}

TiddlyWiki.prototype.getRecursiveTiddlerText = function(title,defaultText,ignoreList)
{
	var childIgnoreList = ignoreList ? ignoreList : {};
	childIgnoreList[title] = true;
	var bracketRegExp = new RegExp("(?:\\[\\[([^\\]]+)\\]\\])","mg");
	var text = this.getTiddlerText(title,defaultText);
	if(text == null)
		return "";
	var textOut = [];
	var lastPos = 0;
	do {
		var match = bracketRegExp.exec(text);
		if(match)
			{
			textOut.push(text.substr(lastPos,match.index-lastPos));
			if(match[1])
				{
				if(childIgnoreList[match[1]])
					textOut.push(match[1]);
				else
					{
					var subText = this.getRecursiveTiddlerText(match[1],match[1],childIgnoreList);
					textOut.push(subText);
					}
				}
			lastPos = match.index + match[1].length + 4;
			}
		else
			textOut.push(text.substr(lastPos));
	} while(match);
	delete childIgnoreList[title];
	return(textOut.join(""));
}

TiddlyWiki.prototype.saveTiddler = function(title,newTitle,newBody,modifier,modified,tags)
{
	var tiddler = this.tiddlers[title];
	if(tiddler)
		delete this.tiddlers[title];
	else
		tiddler = new Tiddler();
	tiddler.set(newTitle,newBody,modifier,modified,tags);
	this.tiddlers[newTitle] = tiddler;
	if(title != newTitle)
		this.notify(title,true);
	this.notify(newTitle,true);
	this.dirty = true;
	return tiddler;
}

TiddlyWiki.prototype.createTiddler = function(title)
{
	tiddler = this.tiddlers[title];
	if(!tiddler)
		{
		tiddler = new Tiddler();
		this.tiddlers[title] = tiddler;
		this.dirty = true;
		}
	return tiddler;
}

// Load contents of a tiddlywiki from an HTML DIV
TiddlyWiki.prototype.loadFromDiv = function(srcID,idPrefix)
{
	if(document.normalize)
		document.normalize();
	var lenPrefix = idPrefix.length;
	var store = document.getElementById(srcID).childNodes;
	for(var t = 0; t < store.length; t++)
		{
		var e = store[t];
		var title = null;
		if(e.getAttribute)
			title = e.getAttribute("tiddler");
		if(!title && e.id && e.id.substr(0,lenPrefix) == idPrefix)
			title = e.id.substr(lenPrefix);
		if(title && title != "")
			{
			var tiddler = this.createTiddler(title);
			tiddler.loadFromDiv(e,title);
			}
		}
	this.dirty = false;
}

// Return an array of tiddlers matching a search string
TiddlyWiki.prototype.search = function(searchText,caseSensitive,useRegExp,sortField,excludeTag)
{
	if (!useRegExp)
		searchText = searchText.escapeRegExp();
	var regExp = new RegExp(searchText,caseSensitive ? "m" : "im");
	var candidates = this.reverseLookup("tags",excludeTag,false);
	var results = [];
	for(var t=0; t<candidates.length; t++)
		{
		if(regExp.test(candidates[t].title) || regExp.test(candidates[t].text))
			results.push(candidates[t]);
		}
	if(!sortField)
		sortField = "title";
	results.sort(function (a,b) {if(a[sortField] == b[sortField]) return(0); else return (a[sortField] < b[sortField]) ? -1 : +1; });
	return results;
}

// Return an array of all the tags in use. Each member of the array is another array where [0] is the name of the tag and [1] is the number of occurances
TiddlyWiki.prototype.getTags = function()
{
	var results = [];
	for(var t in this.tiddlers)
		{
		var tiddler = this.tiddlers[t];
		for(g=0; g<tiddler.tags.length; g++)
			{
			var tag = tiddler.tags[g];
			var f = false;
			for(var c=0; c<results.length; c++)
				if(results[c][0] == tag)
					{
					f = true;
					results[c][1]++;
					}
			if(!f)
				results.push([tag,1]);
			}
		}
	results.sort(function (a,b) {if(a[0] == b[0]) return(0); else return (a[0] < b[0]) ? -1 : +1; });
	return results;
}

// Return an array of the tiddlers that are tagged with a given tag
TiddlyWiki.prototype.getTaggedTiddlers = function(tag,sortField)
{
	return this.reverseLookup("tags",tag,true,sortField);
}

// Return an array of the tiddlers that link to a given tiddler
TiddlyWiki.prototype.getReferringTiddlers = function(title,exclude,sortField)
{
	return this.reverseLookup("links",title,true,sortField);
}

// Return an array of the tiddlers that do or do not have a specified entry in the specified storage array (ie, "links" or "tags")
// lookupMatch == true to match tiddlers, false to exclude tiddlers
TiddlyWiki.prototype.reverseLookup = function(lookupField,lookupValue,lookupMatch,sortField)
{
	var results = [];
	for(var t in this.tiddlers)
		{
		var tiddler = this.tiddlers[t];
		var f = !lookupMatch;
		for(var lookup=0; lookup<tiddler[lookupField].length; lookup++)
			if(tiddler[lookupField][lookup] == lookupValue)
				f = lookupMatch;
		if(f)
			results.push(tiddler);
		}
	if(!sortField)
		sortField = "title";
	results.sort(function (a,b) {if(a[sortField] == b[sortField]) return(0); else return (a[sortField] < b[sortField]) ? -1 : +1; });
	return results;
}

// Return the tiddlers as a sorted array
TiddlyWiki.prototype.getTiddlers = function(field)
{
	var results = [];
	for(var t in this.tiddlers)
		results.push(this.tiddlers[t]);
	if(field)
		results.sort(function (a,b) {if(a[field] == b[field]) return(0); else return (a[field] < b[field]) ? -1 : +1; });
	return results;
}

// Return array of names of tiddlers that are referred to but not defined
TiddlyWiki.prototype.getMissingLinks = function(sortField)
{
	var results = [];
	for(var t in this.tiddlers)
		{
		var tiddler = this.tiddlers[t];
		for(var n=0; n<tiddler.links.length;n++)
			{
			var link = tiddler.links[n];
			if(this.tiddlers[link] == null)
				results.pushUnique(link);
			}
		}
	results.sort();
	return results;
}

// Return an array of names of tiddlers that are defined but not referred to
TiddlyWiki.prototype.getOrphans = function()
{
	var results = [];
	for(var t in this.tiddlers)
		if(this.getReferringTiddlers(t).length == 0)
			results.push(t);
	results.sort();
	return results;
}

// ---------------------------------------------------------------------------------
// Tiddler functions
// ---------------------------------------------------------------------------------

// Display several tiddlers from a list of space separated titles
function displayTiddlers(src,titles,state,highlightText,highlightCaseSensitive,animate,slowly)
{
	var tiddlerNames = titles.readBracketedList();
	for(var t = tiddlerNames.length-1;t>=0;t--)
		displayTiddler(src,tiddlerNames[t],state,highlightText,highlightCaseSensitive,animate,slowly);
}

// Display a tiddler with animation and scrolling, as though a link to it has been clicked on
//	src = source element object (eg link) for animation effects and positioning
//	title = title of tiddler to display
//	state = 0 is default or current state, 1 is read only and 2 is edittable
//	highlightText = text to highlight in the displayed tiddler
//	highlightCaseSensitive = flag for whether the highlight text is case sensitive
function displayTiddler(src,title,state,highlightText,highlightCaseSensitive,animate,slowly)
{
	var place = document.getElementById("tiddlerDisplay");
	var after = findContainingTiddler(src); // Which tiddler this one will be positioned after
	var before;
	if(after == null)
		before = place.firstChild;
	else if(after.nextSibling)
		before = after.nextSibling;
	else
		before = null;
	var theTiddler = createTiddler(place,before,title,state,highlightText,highlightCaseSensitive);
	if(src)
		{
		if(config.options.chkAnimate && (animate == undefined || animate == true))
			anim.startAnimating(new Zoomer(title,src,theTiddler,slowly),new Scroller(theTiddler,slowly));
		else
			window.scrollTo(0,ensureVisible(theTiddler));
		}
}

// Create a tiddler if it doesn't exist (with no fancy animating)
//	place = parent element
//	before = node before which to create/move the tiddler
//	title = title of tiddler to display
//	state = 0 is default or current state, 1 is read only and 2 is edittable
//	highlightText = text to highlight in the displayed tiddler
//	highlightCaseSensitive = flag for whether the highlight text is case sensitive
function createTiddler(place,before,title,state,highlightText,highlightCaseSensitive)
{
	var theTiddler = createTiddlerSkeleton(place,before,title);
	createTiddlerTitle(title,highlightText,highlightCaseSensitive);
	var theViewer = document.getElementById("viewer" + title);
	var theEditor = document.getElementById("editorWrapper" + title);
	switch(state)
		{
		case 0:
			if(!theViewer && !theEditor)
				{
				createTiddlerToolbar(title,false);
				createTiddlerViewer(title,highlightText,highlightCaseSensitive);
				createTiddlerFooter(title,false);
				}
			break;
		case 1: // Viewer
			if(theViewer)
				theViewer.parentNode.removeChild(theViewer);
			if(theEditor)
				theEditor.parentNode.removeChild(theEditor);
			createTiddlerToolbar(title,false);
			createTiddlerViewer(title,highlightText,highlightCaseSensitive);
			createTiddlerFooter(title,false);
			break;
		case 2: // Editor
			if(!theEditor)
				{
				if(theViewer)
					theViewer.parentNode.removeChild(theViewer);
				createTiddlerToolbar(title,true);
				createTiddlerEditor(title);
				createTiddlerFooter(title,true);
				}
			break;
		}
	return(theTiddler);
}

function refreshTiddler(title)
{
	var theViewer = document.getElementById("viewer" + title);
	if(theViewer)
		{
		theViewer.parentNode.removeChild(theViewer);
		createTiddlerViewer(title,null,null);
		}
}

function createTiddlerSkeleton(place,before,title)
{
	var theTiddler = document.getElementById("tiddler" + title);
	if(!theTiddler)
		{
		theTiddler = createTiddlyElement(null,"div","tiddler" + title,"tiddler",null);
		theTiddler.onmouseover = onMouseOverTiddler;
		theTiddler.onmouseout = onMouseOutTiddler;
		theTiddler.ondblclick = onDblClickTiddler;
		var theInnerTiddler = createTiddlyElement(theTiddler,"div",null,"unselectedTiddler",null);
		var theToolbar = createTiddlyElement(theInnerTiddler,"div","toolbar" + title,"toolbar", null);
		var theTitle = createTiddlyElement(theInnerTiddler,"div","title" + title,"title",null);
		var theBody = createTiddlyElement(theInnerTiddler,"div","body" + title,"body",null);
		var theFooter = createTiddlyElement(theInnerTiddler,"div","footer" + title,"footer",null);
		place.insertBefore(theTiddler,before);
		}
	return(theTiddler);
}

function createTiddlerTitle(title,highlightText,highlightCaseSensitive)
{
	var theTitle = document.getElementById("title" + title);
	if(theTitle)
		{
		removeChildren(theTitle);
		if(highlightText == "")
			highlightText = null;
		var highlightRegExp,highlightMatch;
		if(highlightText)
			{
			highlightRegExp = new RegExp(highlightText,highlightCaseSensitive ? "mg" : "img");
			highlightMatch = highlightRegExp.exec(title);
			}
		highlightMatch = subWikify(theTitle,title,0,title.length,highlightRegExp,highlightMatch);
		var tiddler = store.tiddlers[title];
		if(tiddler)
			theTitle.title = tiddler.getSubtitle();
		}
}

// Create a tiddler toolbar according to whether it's an editor or not
function createTiddlerToolbar(title,isEditor)
{
	var theToolbar = document.getElementById("toolbar" + title);
	var lingo = config.views;
	if(theToolbar)
		{
		removeChildren(theToolbar);
		insertSpacer(theToolbar);
		if(isEditor)
			{
			// Editor toolbar
			lingo = lingo.editor;
			createTiddlyButton(theToolbar,lingo.toolbarDone.text,lingo.toolbarDone.tooltip,onClickToolbarSave);
			insertSpacer(theToolbar);
			createTiddlyButton(theToolbar,lingo.toolbarCancel.text,lingo.toolbarCancel.tooltip,onClickToolbarUndo);
			insertSpacer(theToolbar);
			createTiddlyButton(theToolbar,lingo.toolbarDelete.text,lingo.toolbarDelete.tooltip,onClickToolbarDelete);
			}
		else
			{
			// Viewer toolbar
			lingo = lingo.wikified;
			createTiddlyButton(theToolbar,lingo.toolbarClose.text,lingo.toolbarClose.tooltip,onClickToolbarClose);
			insertSpacer(theToolbar);
			if(!readOnly)
				{
				createTiddlyButton(theToolbar,lingo.toolbarEdit.text,lingo.toolbarEdit.tooltip,onClickToolbarEdit);
				insertSpacer(theToolbar);
				}
			createTiddlyButton(theToolbar,lingo.toolbarPermalink.text,lingo.toolbarPermalink.tooltip,onClickToolbarPermaLink);
			insertSpacer(theToolbar);
			createTiddlyButton(theToolbar,lingo.toolbarReferences.text,lingo.toolbarReferences.tooltip,onClickToolbarReferences);
			}
		insertSpacer(theToolbar);
		}
}

function createTiddlerPopup(srcElement)
{
	var popup = document.getElementById("popup");
	if(popup && popup.nextSibling == srcElement)
		{
		hideTiddlerPopup();
		return null;
		}
	if(popup)
		popup.parentNode.removeChild(popup);
	popup = createTiddlyElement(null,"div","popup",null,null);
	var leftPx = srcElement.offsetLeft;
	var topPx = srcElement.offsetTop;
	var heightPx = srcElement.offsetHeight;
	if (leftPx <= 1 && srcElement.parentNode.offsetLeft > 0)
		leftPx = srcElement.parentNode.offsetLeft;
	if (topPx <= 1 && srcElement.parentNode.offsetTop > 0)
		topPx = srcElement.parentNode.offsetTop;
	if (heightPx <= 1 && srcElement.parentNode.offsetHeight > 0)
		heightPx = srcElement.parentNode.offsetHeight;
	popup.style.left = leftPx + "px";
	popup.style.top = topPx + heightPx + "px";
	popup.style.display = "block";
	srcElement.onmouseout = onMouseOutTiddlerPopup;
	srcElement.appendChild(popup);
	return popup;
}

function scrollToTiddlerPopup(popup,slowly)
{
	if(config.options.chkAnimate)
		anim.startAnimating(new Scroller(popup,slowly));
	else
		window.scrollTo(0,ensureVisible(popup));
}

function onMouseOutTiddlerPopup(e)
{
	if (!e) var e = window.event;
	var related = (e.relatedTarget) ? e.relatedTarget : e.toElement;
	try
		{
		while (related != this && related && related.nodeName && related.nodeName.toLowerCase() != "body")
			related = related.parentNode;
		}
	catch(e)
		{
		related = null;
		}
	if(related != this)
		{
		this.onmouseout = null;
		hideTiddlerPopup();
		}
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
	return(false);
}

function hideTiddlerPopup()
{
	var popup = document.getElementById("popup");
	if(popup)
		popup.parentNode.removeChild(popup);
}

// Create the body section of a read-only tiddler
function createTiddlerViewer(title,highlightText,highlightCaseSensitive,htmlElement)
{
	var theBody = document.getElementById("body" + title);
	if(theBody)
		{
		var tiddler = store.tiddlers[title];
		var tiddlerText = store.getTiddlerText(title);
		var theViewer = createTiddlyElement(theBody,htmlElement ? htmlElement : "div","viewer" + title,"viewer",null);
		if(tiddler)
			theViewer.setAttribute("tags",tiddler.tags.join(" "));
		if(tiddlerText == null)
			{
			tiddlerText = config.views.wikified.defaultText.format([title]);
			theViewer.style.fontStyle = "italic";
			}
		wikify(tiddlerText,theViewer,highlightText,highlightCaseSensitive);
		}
}

// Create the footer section of a tiddler
function createTiddlerFooter(title,isEditor)
{
	var theFooter = document.getElementById("footer" + title);
	var tiddler = store.tiddlers[title];
	if(theFooter && tiddler)
		{
		removeChildren(theFooter);
		insertSpacer(theFooter);
		if(isEditor)
			{
			}
		else
			{
			var lingo = config.views.wikified.tag;
			var prompt = tiddler.tags.length == 0 ? lingo.labelNoTags : lingo.labelTags;
			var theTags = createTiddlyElement(theFooter,"div",null,null,prompt);
			for(var t=0; t<tiddler.tags.length; t++)
				{
				var theTag = createTagButton(theTags,tiddler.tags[t],tiddler.title);
				insertSpacer(theTags);
				}
			}
		}
}

// Create a button for a tag with a popup listing all the tiddlers that it tags
function createTagButton(place,tag,excludeTiddler)
{
	var theTag = createTiddlyButton(place,tag,config.views.wikified.tag.tooltip.format([tag]),onClickTag);
	theTag.setAttribute("tag",tag);
	if(excludeTiddler)
		theTag.setAttribute("tiddler",excludeTiddler);
	return(theTag);
}

// Create the body section of an edittable tiddler
function createTiddlerEditor(title)
{
	var theBody = document.getElementById("body" + title);
	if(theBody)
		{
		var tiddlerText = store.getTiddlerText(title);
		var tiddlerExists = (tiddlerText != null);
		if(!tiddlerExists)
			tiddlerText = config.views.editor.defaultText.format([title]);
		var theEditor = createTiddlyElement(theBody,"div","editorWrapper" + title,"editor",null);
		theEditor.onkeypress = onEditKey;
		var theTitleBox = createTiddlyElement(theEditor,"input","editorTitle" + title,null,null);
		theTitleBox.setAttribute("type","text");
		theTitleBox.value = title;
		theTitleBox.setAttribute("size","40");
		var theBodyBox = createTiddlyElement(theEditor,"textarea","editorBody" + title,null,null);
		theBodyBox.value = tiddlerText;
		var rows = 10;
		var lines = tiddlerText.match(regexpNewLine);
		if(lines != null && lines.length > rows)
			rows = lines.length + 5;
		theBodyBox.setAttribute("rows",rows);
		var theTagsBox = createTiddlyElement(theEditor,"input","editorTags" + title,null,null);
		theTagsBox.setAttribute("type","text");
		var tiddler = store.tiddlers[title];
		theTagsBox.value = tiddler ? tiddler.getTags() : "";
		theTagsBox.setAttribute("size","40");
		var tagPrompt = createTiddlyElement(theEditor,"div",null,"editorFooter",config.views.editor.tagPrompt);
		insertSpacer(tagPrompt);
		var lingo = config.views.editor.tagChooser;
		var addTag = createTiddlyButton(tagPrompt,lingo.text,lingo.tooltip,onClickAddTag);
		addTag.setAttribute("tiddler",title);
		theBodyBox.focus();
		}
}

function saveTiddler(title)
{
	var titleBox = document.getElementById("editorTitle" + title);
	var newTitle = titleBox.value;
	if(store.tiddlers[newTitle])
		{
		if(newTitle != title && !confirm(config.messages.overwriteWarning.format([newTitle.toString()])))
			{
			titleBox.focus();
			titleBox.select();
			return;
			}
		}
	var body = document.getElementById("editorBody" + title);
	var newBody = body.value;
	var newTags = document.getElementById("editorTags" + title).value;
	blurTiddler(title);
	store.saveTiddler(title,newTitle,newBody.replace(regexpCarriageReturn,""),config.options.txtUserName,new Date(),newTags);
	displayTiddler(null,newTitle,1,null,null,null,false,false);
	// Close the old tiddler if this is a rename
	if(title != newTitle)
		{
		var oldTiddler = document.getElementById("tiddler" + title);
		var newTiddler = document.getElementById("tiddler" + newTitle);
		oldTiddler.parentNode.replaceChild(newTiddler,oldTiddler);
		}
	if(config.options.chkAutoSave)
		saveChanges();
}

function selectTiddler(title)
{
	var e = document.getElementById("tiddler" + title);
	if(e != null)
		e.firstChild.className = "selectedTiddler";
}

function deselectTiddler(title)
{
	var e = document.getElementById("tiddler" + title);
	if(e != null)
		e.firstChild.className = "unselectedTiddler";
}

function blurTiddler(title)
{
	var body = document.getElementById("editorBody" + title);
	if(title)
		{
		body.focus();
		body.blur();
		}
}

function deleteTiddler(title)
{
	closeTiddler(title,false);
	store.removeTiddler(title);
	// Autosave
	if(config.options.chkAutoSave)
		saveChanges();
}

function closeTiddler(title,slowly)
{
	var tiddler = document.getElementById("tiddler" + title);
	if(tiddler != null)
		{
		scrubIds(tiddler);
		if(config.options.chkAnimate)
			anim.startAnimating(new Slider(tiddler,false,slowly,"all"));
		else
			tiddler.parentNode.removeChild(tiddler);
		}
}

function scrubIds(e)
{
	if(e.id)
		e.id = null;
	var children = e.childNodes;
	for(var t=0; t<children.length; t++)
		{
		var c = children[t];
		if(c.id)
			c.id = null;
		}
}

function closeAllTiddlers()
{
	clearMessage();
	var place = document.getElementById("tiddlerDisplay");
	var tiddler = place.firstChild;
	var nextTiddler;
	while(tiddler)
		{
		nextTiddler = tiddler.nextSibling;
		if(tiddler.id)
			if(tiddler.id.substr(0,7) == "tiddler")
				{
				var title = tiddler.id.substr(7);
				if(!document.getElementById("editorWrapper" + title))
					place.removeChild(tiddler);
				}
		tiddler = nextTiddler;
		}
}

// ---------------------------------------------------------------------------------
// Regular expression stuff
// ---------------------------------------------------------------------------------

var upperLetter = "[A-Z\u00c0-\u00de\u0150\u0170]";
var lowerLetter = "[a-z\u00df-\u00ff_0-9\\-\u0151\u0171]";
var anyLetter = "[A-Za-z\u00c0-\u00de\u00df-\u00ff_0-9\\-\u0150\u0170\u0151\u0171]";
var anyDigit = "[0-9]";
var anyNumberChar = "[0-9\\.E]";
var wikiNamePattern = "(~?)((?:" + upperLetter + "+" + lowerLetter + "+" + upperLetter + anyLetter + "*)|(?:" + upperLetter + "{2,}" + lowerLetter + "+))";
var urlPattern = "((?:http|https|mailto|ftp):[^\\s'\"]+(?:/|\\b))";
var explicitLinkPattern = "\\[\\[([^\\[\\]\\|]+)\\|([^\\[\\]\\|]+)\\]\\]";
var bracketNamePattern = "\\[\\[([^\\]]+)\\]\\]";

var wikiNamePatterns;
var wikiNameRegExp;
var structurePatterns;
var stylePatterns;
var tableRegExp;
var tableRowColRegExp;
var invalidPreWikiNamePattern;

function setupRegexp()
{
	// Table rows pattern
	var rowPattern = "^\\|([^\\n]*\\|)([fhc]?)$";
	tableRegExp = new RegExp(rowPattern,"mg");
	// Table columns pattern
	var elementPattern = "(?:(?:BGCOLOR|bgcolor)\\(([^\\)]+)\\):)?" +
		"("+
		"("+explicitLinkPattern+")?"+
		"("+bracketNamePattern+")?" +
		"[^\\|]*"+
		")\\|";
	tableRowColRegExp = new RegExp(elementPattern,"g");
	// Link patterns
	wikiNamePatterns = "(?:" + wikiNamePattern +
		")|(?:" + urlPattern +
		")|(?:" + explicitLinkPattern +
		")|(?:" + bracketNamePattern +
		")";
	wikiNameRegExp = new RegExp(wikiNamePatterns,"mg");
	invalidPreWikiNamePattern = anyLetter;
	// Structural patterns
	var breakPattern = "\\n";
	var horizontalRulePattern = "^----$\\n?";
	var headerPattern = "^!{1,5}";
	var bulletListItemPattern = "^\\*+";
	var numberedListItemPattern = "^#+";
	var tablePattern = "(?:^\\|[^\\n]*$\\n?)+";
	var blockquotePattern = "(?:^>[^\\n]*$\\n?)+";
	var blockquotePattern2 = "^<<<\\n((?:^(?!<<<)[^\\n]*\\n)+)(^<<<$\\n?)";
	var imagePattern = "\\[[Ii][Mm][Gg]\\[(?:([^\\|\\]]+)\\|)?([^\\[\\]\\|]+)\\]\\]";
	var verbatimPattern = "^\\{\\{\\{\\n((?:^[^\\n]*\\n)+?)(^\\}\\}\\}$\\n?)";
	var macroPattern = "<<([^>\\s]+)(?:\\s*)([^>]*)>>";
	structurePatterns = "(" + breakPattern +
		")|(" + horizontalRulePattern +
		")|(" + headerPattern +
		")|(" + bulletListItemPattern +
		")|(" + numberedListItemPattern +
		")|(" + tablePattern +
		")|(" + blockquotePattern +
		")|(?:" + blockquotePattern2 +
		")|(?:" + imagePattern +
		")|(?:" + verbatimPattern +
		")|(?:" + macroPattern +
		")";
	// Style patterns
	var boldPattern = "''((?:[^']+(?:'[^'])?)+)''";
	var strikePattern = "==([^=]+)==";
	var underlinePattern = "__([^_]+)__";
	var italicPattern = "//([^/]+)//";
	var supPattern = "\\^\\^([^\\^]+)\\^\\^";
	var subPattern = "~~([^~]+)~~";
	var monoPattern = "\\{\\{\\{(.*?)\\}\\}\\}";
	var colorPattern = "@@(?:color\\(([^\\)]+)\\):|bgcolor\\(([^\\)]+)\\):){0,2}([^@]+)@@";
	stylePatterns = "(?:" + boldPattern +
		")|(?:" + strikePattern +
		")|(?:" + underlinePattern +
		")|(?:" + italicPattern +
		")|(?:" + supPattern +
		")|(?:" + subPattern +
		")|(?:" + colorPattern +
		")|(?:" + monoPattern +
		")";
}

// Create child text nodes and link elements to represent a wiki-fied version of some text
function wikify(text,parent,highlightText,highlightCaseSensitive)
{
	// Prepare the regexp for the highlighted selection
	if(highlightText == "")
		highlightText = null;
	var highlightRegExp,highlightMatch;
	if(highlightText)
		{
		highlightRegExp = new RegExp(highlightText,highlightCaseSensitive ? "mg" : "img");
		highlightMatch = highlightRegExp.exec(text);
		}
	wikifyStructures(parent,text,text,0,text.length,highlightRegExp,highlightMatch);
}


function wikifyStructures(parent,text,targetText,startPos,endPos,highlightRegExp,highlightMatch)
{
	var body = parent;
	var structureRegExp = new RegExp(structurePatterns,"mg");
	var theList = []; // theList[0]: don't use
	var isInListMode = false;
	var isInHeaderMode = false;
	var isNewline = false;
	// The start of the fragment of the text being considered
	var nextPos = 0;
	// Loop through the bits of the body text
	do {
		// Get the next formatting match
		var formatMatch = structureRegExp.exec(targetText);
		var matchPos = formatMatch ? formatMatch.index : targetText.length;
		// Subwikify the plain text before the match
		if(nextPos < matchPos)
			{
			isNewline = false;
			highlightMatch = wikifyStyles(body,text,targetText.substring(nextPos,matchPos),startPos+nextPos,startPos+matchPos,highlightRegExp,highlightMatch);
			}
		// Dump out the formatted match
		var level;
		var theBlockquote;
		if(formatMatch)
			{
			// Dump out the link itself in the appropriate format
			if(formatMatch[1])
				{
				if(isNewline && isInListMode)
					{
					theList = [];
					body = parent;
					isInListMode = false;
					}
				else if(isInHeaderMode)
					{
					body = parent;
					isInHeaderMode = false;
					}
				else
					{
					isNewline = true;
					body.appendChild(document.createElement("br"));
					}
				}
			else if(formatMatch[2])
				{
				isNewline = false;
				body.appendChild(document.createElement("hr"));
				}
			else if(formatMatch[3])
				{
				level = formatMatch[3].length;
				isNewline = false;
				isInHeaderMode = true;
				var theHeader = document.createElement("h" + level);
				parent.appendChild(theHeader);
				body = theHeader;
				}
			else if(formatMatch[4])
				{
				level = formatMatch[4].length;
				isNewline = false;
				isInListMode = true;
				if (theList[level] == null)
					{
					theList[level] = document.createElement("ul");
					body.appendChild(theList[level]);
					}
				theList = theList.slice(0,level + 1);
				body = document.createElement("li");
				theList[level].appendChild(body);
				}
			else if(formatMatch[5])
				{
				level = formatMatch[5].length;
				isNewline = false;
				isInListMode = true;
				if (theList[level] == null)
					{
					theList[level] = document.createElement("ol");
					body.appendChild(theList[level]);
					}
				theList = theList.slice(0,level + 1);
				body = document.createElement("li");
				theList[level].appendChild(body);
				}
			else if(formatMatch[6])
				{
				isNewline = false;
				highlightMatch = wikifyTable(body,text,formatMatch[6],startPos+matchPos,startPos+structureRegExp.lastIndex,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[7])
				{
				isNewline = false;
				var quotedText = formatMatch[7].replace(new RegExp("^>(>*)","mg"),"$1");
				theBlockquote = document.createElement("blockquote");
				var newHighlightRegExp,newHighlightMatch;
				if (highlightRegExp) {
					newHighlightRegExp = new RegExp(highlightRegExp.toString(), "img");
					newHighlightMatch = newHighlightRegExp.exec(quotedText);
				}
				wikifyStructures(theBlockquote,quotedText,quotedText,0,quotedText.length,newHighlightRegExp,newHighlightMatch);
				body.appendChild(theBlockquote);
				}
			else if(formatMatch[8])
				{
				isNewline = false;
				theBlockquote = document.createElement("blockquote");
				highlightMatch = wikifyStructures(theBlockquote,text,formatMatch[8],startPos+matchPos+4,startPos+structureRegExp.lastIndex-formatMatch[9].length,highlightRegExp,highlightMatch);
				body.appendChild(theBlockquote);
				}
			else if(formatMatch[11])
				{
				isNewline = false;
				var theImage = document.createElement("img");
				theImage.alt = formatMatch[10];
				theImage.src = formatMatch[11];
				body.appendChild(theImage);
				}
			else if(formatMatch[12])
				{
				isNewline = false;
				var theVerbatim = document.createElement("pre");
				out = text.substr(startPos+matchPos+4,startPos+structureRegExp.lastIndex-formatMatch[13].length-startPos-matchPos-4);
				out = out.replace(/\n/g,"\r\n");
				theVerbatim.appendChild(document.createTextNode(out));
				body.appendChild(theVerbatim);
				}
			else if(formatMatch[14])
				{
				isNewline = false;
				insertMacro(body,formatMatch[14],formatMatch[15]);
				}
			}
		// Move the next position past the formatting match
		nextPos = structureRegExp.lastIndex;
	} while(formatMatch);
	return highlightMatch;
}

function wikifyLinks(parent,text,targetText,startPos,endPos,highlightRegExp,highlightMatch)
{
	// The start of the fragment of the text being considered
	var nextPos = 0;
	// Loop through the bits of the body text
	var theLink;
	do {
		// Get the next formatting match
		var formatMatch = wikiNameRegExp.exec(targetText);
		var matchPos = formatMatch ? formatMatch.index : targetText.length;
		// Subwikify the plain text before the match
		if(nextPos < matchPos)
			highlightMatch = subWikify(parent,text,startPos+nextPos,startPos+matchPos,highlightRegExp,highlightMatch);
		// Dump out the formatted match
		if(formatMatch)
			{
			// Dump out the link itself in the appropriate format
			if(formatMatch[2])
				{
				if(formatMatch[1])
					{
					theLink = parent;
					matchPos++;
					}
				else if(matchPos > 0 && new RegExp(invalidPreWikiNamePattern,"").exec(targetText.charAt(matchPos - 1)))
					theLink = parent;
				else
					theLink = createTiddlyLink(parent,formatMatch[2],false);
				highlightMatch = subWikify(theLink,text,startPos+matchPos,startPos+wikiNameRegExp.lastIndex,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[3])
				{
				theLink = createExternalLink(parent,formatMatch[3]);
				highlightMatch = subWikify(theLink,text,startPos+matchPos,startPos+wikiNameRegExp.lastIndex,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[4])
				{
				if(store.tiddlers[formatMatch[5]] != undefined)
					theLink = createTiddlyLink(parent,formatMatch[5],false);
				else
					theLink = createExternalLink(parent,formatMatch[5]);
				highlightMatch = subWikify(theLink,text,startPos+matchPos+2,startPos+matchPos+2+formatMatch[4].length,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[6])
				{
				theLink = createTiddlyLink(parent,formatMatch[6],false);
				highlightMatch = subWikify(theLink,text,startPos+matchPos+2,startPos+wikiNameRegExp.lastIndex-2,highlightRegExp,highlightMatch);
				}
			}
		// Move the next position past the formatting match
		nextPos = wikiNameRegExp.lastIndex;
	} while(formatMatch);
	return highlightMatch;
}

function wikifyStyles(parent,text,targetText,startPos,endPos,highlightRegExp,highlightMatch)
{
	var formatRegExp = new RegExp(stylePatterns,"mg");
	// The start of the fragment of the text being considered
	var nextPos = 0;
	// Loop through the bits of the body text
	do {
		// Get the next formatting match
		var formatMatch = formatRegExp.exec(targetText);
		var matchPos = formatMatch ? formatMatch.index : targetText.length;
		// Subwikify the plain text before the match
		if(nextPos < matchPos)
			highlightMatch = wikifyLinks(parent,text,targetText.substring(nextPos,matchPos),startPos+nextPos,startPos+matchPos,highlightRegExp,highlightMatch);
		// Dump out the formatted match
		if(formatMatch)
			{
			// Dump out the link itself in the appropriate format
			if(formatMatch[1])
				{
				var theBold = createTiddlyElement(parent,"b",null,null,null);
				highlightMatch = wikifyStyles(theBold,text,formatMatch[1],startPos+matchPos+2,startPos+formatRegExp.lastIndex-2,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[2])
				{
				var theStrike = createTiddlyElement(parent,"strike",null,null,null);
				highlightMatch = wikifyStyles(theStrike,text,formatMatch[2],startPos+matchPos+2,startPos+formatRegExp.lastIndex-2,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[3])
				{
				var theUnderline = createTiddlyElement(parent,"u",null,null,null);
				highlightMatch = wikifyStyles(theUnderline,text,formatMatch[3],startPos+matchPos+2,startPos+formatRegExp.lastIndex-2,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[4])
				{
				var theItalic = createTiddlyElement(parent,"i",null,null,null);
				highlightMatch = wikifyStyles(theItalic,text,formatMatch[4],startPos+matchPos+2,startPos+formatRegExp.lastIndex-2,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[5])
				{
				var theSup = createTiddlyElement(parent,"sup",null,null,null);
				highlightMatch = wikifyStyles(theSup,text,formatMatch[5],startPos+matchPos+2,startPos+formatRegExp.lastIndex-2,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[6])
				{
				var theSub = createTiddlyElement(parent,"sub",null,null,null);
				highlightMatch = wikifyStyles(theSub,text,formatMatch[6],startPos+matchPos+2,startPos+formatRegExp.lastIndex-2,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[9])
				{
				var theSpan;
				if ((formatMatch[7] == "" || formatMatch[7] == null) && (formatMatch[8] == "" || formatMatch[8] == null))
					{
					theSpan = createTiddlyElement(parent,"span",null,"marked",null);
					}
					else
					{
					theSpan = createTiddlyElement(parent,"span",null,null,null);
					if (formatMatch[7] != "") theSpan.style.color = formatMatch[7];
					if (formatMatch[8] != "") theSpan.style.background = formatMatch[8];
					}
				highlightMatch = wikifyStyles(theSpan,text,formatMatch[9],startPos+formatRegExp.lastIndex-2-formatMatch[9].length,startPos+formatRegExp.lastIndex-2,highlightRegExp,highlightMatch);
				}
			else if(formatMatch[10])
				{
				var theCode = createTiddlyElement(parent,"code",null,null,null);
				highlightMatch = wikifyStyles(theCode,text,formatMatch[10],startPos+matchPos+3,startPos+formatRegExp.lastIndex-3,highlightRegExp,highlightMatch);
				}
			}
		// Move the next position past the formatting match
		nextPos = formatRegExp.lastIndex;
	} while(formatMatch);
	return highlightMatch;
}

// Create a table
function wikifyTable(parent,text,targetText,startPos,endPos,highlightRegExp,highlightMatch)
{
	// The start of the fragment of the text being considered
	var nextPos = 0;
	var theTable = document.createElement("table");
	var bodyRowLen = 0;
	var headRowLen = 0;
	var footRowLen = 0;
	var bodyRows = [];
	var headRows = [];
	var footRows = [];
	var theCaption = null;
	// Loop through the bits of the body text
	do {
		// Get the next formatting match
		var formatMatch = tableRegExp.exec(targetText);
		var matchPos = formatMatch ? formatMatch.index : targetText.length;
		// Dump out the formatted match
		if(formatMatch) {
			if (formatMatch[2] == "c") {
				var cap = formatMatch[1].substring(0,formatMatch[1].length-1);
				theCaption = document.createElement("caption");
				highlightMatch = wikifyStyles(theCaption,text,cap,startPos+matchPos+1,startPos+cap.length,highlightRegExp,highlightMatch);
				if (bodyRowLen == 0 && headRowLen == 0 && footRowLen == 0) {
					theCaption.setAttribute("align", "top");
				} else {
					theCaption.setAttribute("align", "bottom");
				}
			} else if (formatMatch[2] == "h") {
				highlightMatch = wikifyTableRow(headRows,headRowLen,text,formatMatch[1],startPos+matchPos,startPos+matchPos+formatMatch[1].length,highlightRegExp,highlightMatch);
				headRowLen++;
			} else if (formatMatch[2] == "f") {
				highlightMatch = wikifyTableRow(footRows,footRowLen,text,formatMatch[1],startPos+matchPos,startPos+matchPos+formatMatch[1].length,highlightRegExp,highlightMatch);
				footRowLen++;
			} else {
				highlightMatch = wikifyTableRow(bodyRows,bodyRowLen,text,formatMatch[1],startPos+matchPos,startPos+matchPos+formatMatch[1].length,highlightRegExp,highlightMatch);
				bodyRowLen++;
			}
		}
		nextPos = tableRegExp.lastIndex;
	} while(formatMatch);

	if (theCaption != null) {
		theTable.appendChild(theCaption);
	}

	if (headRowLen > 0) {
		var theTableHead = document.createElement("thead");
		createTableRows(headRows,theTableHead);
		theTable.appendChild(theTableHead);
	}

	if (bodyRowLen > 0) {
		var theTableBody = document.createElement("tbody");
		createTableRows(bodyRows,theTableBody);
		theTable.appendChild(theTableBody);
	}

	if (footRowLen > 0) {
		var theTableFoot = document.createElement("tfoot");
		createTableRows(footRows,theTableFoot);
		theTable.appendChild(theTableFoot);
	}

	parent.appendChild(theTable);
	return highlightMatch;
}

function wikifyTableRow(rows,rowIndex,text,targetText,startPos,endPos,highlightRegExp,highlightMatch)
{
	// The start of the fragment of the text being considered
	var eIndex = 0;
	var elements = [];
	// Loop through the bits of the body text
	do {
		// Get the next formatting match
		var formatMatch = tableRowColRegExp.exec(targetText);
		var matchPos = formatMatch ? formatMatch.index : targetText.length;
		if(formatMatch) {
			var eText = formatMatch[2];
			if (eText == "~" || eText == ">") {
				elements[eIndex] = eText;
			} else {
				var eTextLen = eText.length;
				var align = "";
				if (eTextLen >= 1 && eText.charAt(0) == " ") {
					if (eTextLen >= 3 && eText.charAt(eTextLen - 1) == " ") {
						align = "center";
						eText = eText.substring(1,eTextLen - 1);
						//eTextLen -= 2;
						eTextLen--;
					} else {
						align = "right";
						eText = eText.substring(1);
						eTextLen--;
					}
				} else if (eTextLen >= 2 && eText.charAt(eTextLen - 1) == " ") {
					align = "left";
					eText = eText.substring(0,eTextLen - 1);
					//eTextLen--;
				}
				var theElement;
				if (eTextLen >= 1 && eText.charAt(0) == "!") {
					theElement = document.createElement("th");
					eText = eText.substring(1);
					eTextLen--;
				} else {
					theElement = document.createElement("td");
				}
				if (align != "") {
					theElement.align = align;
				}
				if (formatMatch[1]) {
					theElement.style.background = formatMatch[1];
				}
				highlightMatch = wikifyStyles(theElement,text,eText,startPos+tableRowColRegExp.lastIndex-eTextLen,startPos+tableRowColRegExp.lastIndex-1,highlightRegExp,highlightMatch);
				elements[eIndex] = theElement;
			}
			eIndex++;
		}
	} while(formatMatch);
	rows[rowIndex] = elements;
	return highlightMatch;
}

function createTableRows(rows,parent)
{
	var i, j, k, cols;
	for (i = 0; i < rows.length; i++) {
		cols = rows[i];
		var theRow = document.createElement("tr");
		for (j = 0; j < cols.length; j++) {
			if (cols[j] == "~") continue;
			var rowspan = 1;
			for (k = i+1; k < rows.length; k++) {
				if (rows[k][j] != "~") break;
				rowspan++;
			}
			var colspan = 1;
			for (; j < cols.length - 1; j++) {
				if (cols[j] != ">") break;
				colspan++;
			}
			var theElement = cols[j];
			if (rowspan > 1) {
				theElement.setAttribute("rowSpan",rowspan);
				theElement.setAttribute("rowspan",rowspan);
				theElement.valign = "center";
			}
			if (colspan > 1) {
				theElement.setAttribute("colSpan",colspan);
				theElement.setAttribute("colspan",colspan);
			}
			theRow.appendChild(theElement);
		}
		parent.appendChild(theRow);
	}
}

// Helper for wikify that handles highlights within runs of text
function subWikify(parent,text,startPos,endPos,highlightRegExp,highlightMatch)
{
	// Check for highlights
	while(highlightMatch && (highlightRegExp.lastIndex > startPos) && (highlightMatch.index < endPos) && (startPos < endPos))
		{
		// Deal with the plain text before the highlight
		if(highlightMatch.index > startPos)
			{
			parent.appendChild(document.createTextNode(text.substring(startPos,highlightMatch.index)));
			startPos = highlightMatch.index;
			}
		// Deal with the highlight
		var highlightEnd = Math.min(highlightRegExp.lastIndex,endPos);
		var theHighlight = createTiddlyElement(parent,"span",null,"highlight",text.substring(startPos,highlightEnd));
		startPos = highlightEnd;
		// Nudge along to the next highlight if we're done with this one
		if(startPos >= highlightRegExp.lastIndex)
			highlightMatch = highlightRegExp.exec(text);
		}
	// Do the unhighlighted text left over
	if(startPos < endPos)
		{
		parent.appendChild(document.createTextNode(text.substring(startPos,endPos)));
		//startPos = endPos;
		}
	return(highlightMatch);
}

// ---------------------------------------------------------------------------------
// Message area
// ---------------------------------------------------------------------------------

function displayMessage(text,linkText)
{
	var msgArea = document.getElementById("messageArea");
	var msg;
	if(linkText)
		{
		msg = createTiddlyElement(msgArea,"div",null,null,null);
		var link = createTiddlyElement(msg,"a",null,null,text);
		link.href = linkText;
		link.target = "_blank";
		}
	else
		msg = createTiddlyElement(msgArea,"div",null,null,text);
	msgArea.style.display = "block";
}

function clearMessage()
{
	var msgArea = document.getElementById("messageArea");
	removeChildren(msgArea);
	msgArea.style.display = "none";
}

// ---------------------------------------------------------------------------------
// Menu and sidebar functions
// ---------------------------------------------------------------------------------

function refreshStory(hint)
{
	var hits = hint ? store.getReferringTiddlers(hint) : null;
	var displayNodes = document.getElementById("tiddlerDisplay").childNodes;
	for(var t=0;t<displayNodes.length;t++)
		{
		var theId = displayNodes[t].id;
		if(theId && theId.substr(0,7) == "tiddler")
			{
			var title = theId.substr(7);
			if(hint)
				{
				var f = false;
				for(var h=0; h<hits.length; h++)
					if(hits[h].title == title)
						f = true
				if(f)
					refreshTiddler(title);
				}
			else
				refreshTiddler(title);
			}
		}
}

function refreshTabs(hint)
{
	refreshSpecialItem("sidebarTabs","SideBarTabs","SideBarTabs");
}

function refreshMenu(hint)
{
	refreshSpecialItem("mainMenu","MainMenu","MainMenu");
}

function refreshTitle(title)
{
	refreshSpecialItem("siteTitle",title,"SiteTitle");
	refreshPageTitle();
}

function refreshSubtitle(title)
{
	refreshSpecialItem("siteSubtitle",title,"SiteSubtitle");
	refreshPageTitle();
}

function refreshPageTitle()
{
	document.title = getElementText("siteTitle") + " - " + getElementText("siteSubtitle");
}

function refreshSidebar(title)
{
	refreshSpecialItem("sidebarOptions",title,"SideBarOptions");
}

function refreshSpecialItem(elementID,title,defaultText)
{
	var place = document.getElementById(elementID);
	removeChildren(place);
	wikify(store.getTiddlerText(title,defaultText),place,null,null);
}

function refreshStyles(title)
{
	setStylesheet(title == null ? "" : store.getRecursiveTiddlerText(title,""));
}

// ---------------------------------------------------------------------------------
// Options cookie stuff
// ---------------------------------------------------------------------------------

function loadOptionsCookie()
{
	var cookies = document.cookie.split(";");
	for(var c=0; c<cookies.length; c++)
		{
		var p = cookies[c].indexOf("=");
		if(p != -1)
			{
			var name = cookies[c].substr(0,p).trim();
			var value = cookies[c].substr(p+1).trim();
			switch(name.substr(0,3))
				{
				case "txt":
					config.options[name] = unescape(value);
					break;
				case "chk":
					config.options[name] = value == "true";
					break;
				}
			}
		}
}

function saveOptionCookie(name)
{
	var c = name + "=";
	switch(name.substr(0,3))
		{
		case "txt":
			c += escape(config.options[name].toString());
			break;
		case "chk":
			c += config.options[name] ? "true" : "false";
			break;
		}
	c += "; expires=Fri, 1 Jan 2038 12:00:00 UTC; path=/";
	document.cookie = c;
}

// ---------------------------------------------------------------------------------
// Saving
// ---------------------------------------------------------------------------------

var saveUsingSafari = false;
var startSaveArea = '<div id="' + 'storeArea">'; // Split up into two so that indexOf() of this source doesn't find it
var endSaveArea = '</d' + 'iv>';

// Check if there any unsaved changes before exitting
function checkUnsavedChanges()
{
	if(store.dirty)
		{
		if(confirm(config.messages.unsavedChangesWarning))
			saveChanges();
		}
}

// Save this tiddlywiki with the pending changes
function saveChanges()
{
	clearMessage();
	// Get the URL of the document
	var originalPath = document.location.toString();
	// Check we were loaded from a file URL
	if(originalPath.substr(0,5) != "file:")
		{
		alert(config.messages.notFileUrlError);
		displayTiddler(null,"SaveChanges",0,null,null,false,false);
		return;
		}
	// Remove any location part of the URL
	var hashPos = originalPath.indexOf("#");
	if(hashPos != -1)
		originalPath = originalPath.substr(0,hashPos);
	// Convert to a native file format assuming
	// "file:///x:/path/path/path..." - pc local file --> "x:\path\path\path..."
	// "file://///server/share/path/path/path..." - FireFox pc network file --> "\\server\share\path\path\path..."
	// "file:///path/path/path..." - mac/unix local file --> "/path/path/path..."
	// "file://server/share/path/path/path..." - pc network file --> "\\server\share\path\path\path..."
	var localPath;
	if(originalPath.charAt(9) == ":") // pc local file
		localPath = unescape(originalPath.substr(8)).replace(new RegExp("/","g"),"\\");
	else if(originalPath.indexOf("file://///") == 0) // FireFox pc network file
		localPath = "\\\\" + unescape(originalPath.substr(10)).replace(new RegExp("/","g"),"\\");
	else if(originalPath.indexOf("file:///") == 0) // mac/unix local file
		localPath = unescape(originalPath.substr(7));
	else if(originalPath.indexOf("file:/") == 0) // mac/unix local file
		localPath = unescape(originalPath.substr(5));
	else // pc network file
		localPath = "\\\\" + unescape(originalPath.substr(7)).replace(new RegExp("/","g"),"\\");
	// Load the original file
	var original = loadFile(localPath);
	if(original == null)
		{
		alert(config.messages.cantSaveError);
		displayTiddler(null,"SaveChanges",0,null,null,false,false);
		return;
		}
	// Locate the storeArea div's
	var posOpeningDiv = original.indexOf(startSaveArea);
	var posClosingDiv = original.lastIndexOf(endSaveArea);
	if((posOpeningDiv == -1) || (posClosingDiv == -1))
		{
		alert(config.messages.invalidFileError.format([localPath]));
		return;
		}
	// Save the backup
	if(config.options.chkSaveBackups)
		{
		var backupPath = localPath.substr(0,localPath.lastIndexOf(".")) + "." + (new Date()).convertToYYYYMMDDHHMMSSMMM() + ".html";
		var backup = saveFile(backupPath,original);
		if(backup)
			displayMessage(config.messages.backupSaved,"file://" + backupPath);
		else
			alert(config.messages.backupFailed);
		}
	// Save Rss
	if(config.options.chkGenerateAnRssFeed)
		{
		var rssPath = localPath.substr(0,localPath.lastIndexOf(".")) + ".xml";
		var rssSave = saveFile(rssPath,convertUnicodeToUTF8(generateRss()));
		if(rssSave)
			displayMessage(config.messages.rssSaved,"file://" + rssPath);
		else
			alert(config.messages.rssFailed);
		}
	// Save empty template
	if(config.options.chkSaveEmptyTemplate)
		{
		var emptyPath,p;
		if((p = localPath.lastIndexOf("/")) != -1)
			emptyPath = localPath.substr(0,p) + "/empty.html";
		else if((p = localPath.lastIndexOf("\\")) != -1)
			emptyPath = localPath.substr(0,p) + "\\empty.html";
		else
			emptyPath = localPath + ".empty.html";
		var empty = original.substr(0,posOpeningDiv + startSaveArea.length) + convertUnicodeToUTF8(generateEmpty()) + original.substr(posClosingDiv);
		var emptySave = saveFile(emptyPath,empty);
		if(emptySave)
			displayMessage(config.messages.emptySaved,"file://" + emptyPath);
		else
			alert(config.messages.emptyFailed);
		}
	// Save new file
	var revised = original.substr(0,posOpeningDiv + startSaveArea.length) + 
				convertUnicodeToUTF8(allTiddlersAsHtml()) + "\n\t\t" +
				original.substr(posClosingDiv);
	var newSiteTitle = store.getTiddlerText("SiteTitle","TiddlyWiki").htmlEncode();
	revised = revised.replace(new RegExp("<title>[^<]*</title>", "im"),"<title>"+ newSiteTitle +"</title>");
	var save = saveFile(localPath,revised);
	if(save)
		{
		displayMessage(config.messages.mainSaved,"file://" + localPath);
		store.setDirty(false);
		}
	else
		alert(config.messages.mainFailed);
}

function generateRss()
{
	var s = [];
	var d = new Date();
	var u = store.getTiddlerText("SiteUrl",null);
	// Assemble the header
	s.push("<" + "?xml version=\"1.0\"?" + ">");
	s.push("<rss version=\"2.0\">");
	s.push("<channel>");
	s.push("<title>" + store.getTiddlerText("SiteTitle","").htmlEncode() + "</title>");
	if(u)
		s.push("<link>" + u.htmlEncode() + "</link>");
	s.push("<description>" + store.getTiddlerText("SiteSubtitle","").htmlEncode() + "</description>");
	s.push("<language>en-us</language>");
	s.push("<copyright>Copyright " + d.getFullYear() + " " + config.options.txtUserName.htmlEncode() + "</copyright>");
	s.push("<pubDate>" + d.toGMTString() + "</pubDate>");
	s.push("<lastBuildDate>" + d.toGMTString() + "</lastBuildDate>");
	s.push("<docs>http://blogs.law.harvard.edu/tech/rss</docs>");
	s.push("<generator>TiddlyWiki " + version.major + "." + version.minor + "." + version.revision + "</generator>");
	// The body
	var tiddlers = store.getTiddlers("modified");
	var n = config.numRssItems > tiddlers.length ? 0 : tiddlers.length-config.numRssItems;
	for (var t=tiddlers.length-1; t>=n; t--)
		s.push(tiddlers[t].saveToRss(u));
	// And footer
	s.push("</channel>");
	s.push("</rss>");
	// Save it all
	return s.join("\n");
}

function generateEmpty()
{
	var systemTiddlers = store.getTaggedTiddlers("systemTiddlers");
	var savedTiddlers = [];
	for(var s=0;s<systemTiddlers.length;s++)
		savedTiddlers.push(systemTiddlers[s].saveToDiv());
	return savedTiddlers.join("\n");
}

function allTiddlersAsHtml()
{
	var savedTiddlers = [];
	var tiddlers = store.getTiddlers("modified");
	for (var t = 0; t < tiddlers.length; t++)
		savedTiddlers.push(tiddlers[t].saveToDiv());
	return savedTiddlers.join("\n");
}

// UTF-8 encoding rules:
// 0x0000 - 0x007F:	0xxxxxxx
// 0x0080 - 0x07FF:	110xxxxx 10xxxxxx
// 0x0800 - 0xFFFF:	1110xxxx 10xxxxxx 10xxxxxx

function convertUTF8ToUnicode(u)
{
	var s = "";
	var t = 0;
	var b1, b2, b3;
	while(t < u.length)
		{
		b1 = u.charCodeAt(t++);
		if(b1 < 0x80)
			s += String.fromCharCode(b1);
		else if(b1 < 0xE0)
			{
			b2 = u.charCodeAt(t++);
			s += String.fromCharCode(((b1 & 0x1F) << 6) | (b2 & 0x3F));
			}
		else
			{
			b2 = u.charCodeAt(t++);
			b3 = u.charCodeAt(t++);
			s += String.fromCharCode(((b1 & 0xF) << 12) | ((b2 & 0x3F) << 6) | (b3 & 0x3F));
			}
	}
	return(s);
}

function convertUnicodeToUTF8(s)
{
	if(saveUsingSafari)
		return s;
	else if(window.Components)
		return mozConvertUnicodeToUTF8(s);
	else
		return manualConvertUnicodeToUTF8(s);
}

function manualConvertUnicodeToUTF8(s)
{
	var u = [];
	for(var t=0;t<s.length;t++)
		{
		var c = s.charCodeAt(t);
		if(c <= 0x7F)
			u.push(String.fromCharCode(c));
		else
			u.push("&#" + c.toString() + ";");
		}
	return(u.join(""));
}

function mozConvertUnicodeToUTF8(s)
{
	netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
	var converter = Components.classes["@mozilla.org/intl/scriptableunicodeconverter"].createInstance(Components.interfaces.nsIScriptableUnicodeConverter);
	converter.charset = "UTF-8";
	var u = converter.ConvertFromUnicode(s);
	var fin = converter.Finish();
	if(fin.length > 0)
		return u + fin;
	else
		return u;
}

function saveFile(fileUrl, content)
{
	var r = null;
	if(saveUsingSafari)
		r = safariSaveFile(fileUrl, content);
	if((r == null) || (r == false))
		r = mozillaSaveFile(fileUrl, content);
	if((r == null) || (r == false))
		r = ieSaveFile(fileUrl, content);
	return(r);
}

function loadFile(fileUrl)
{
	var r = null;
	if(saveUsingSafari)
		r = safariLoadFile(fileUrl);
	if((r == null) || (r == false))
		r = mozillaLoadFile(fileUrl);
	if((r == null) || (r == false))
		r = ieLoadFile(fileUrl);
	return(r);
}

// Returns null if it can't do it, false if there's an error, true if it saved OK
function ieSaveFile(filePath, content)
{
	try
		{
		var fso = new ActiveXObject("Scripting.FileSystemObject");
		}
	catch(e)
		{
		//alert("Exception while attempting to save\n\n" + e.toString());
		return(null);
		}
	var file = fso.OpenTextFile(filePath,2,-1,0);
	file.Write(content);
	file.Close();
	return(true);
}

// Returns null if it can't do it, false if there's an error, or a string of the content if successful
function ieLoadFile(filePath)
{
	try
		{
		var fso = new ActiveXObject("Scripting.FileSystemObject");
		}
	catch(e)
		{
		//alert("Exception while attempting to load\n\n" + e.toString());
		return(null);
		}
	var file = fso.OpenTextFile(filePath,1);
	var content = file.ReadAll();
	file.Close();
	return(content);
}

// Returns null if it can't do it, false if there's an error, true if it saved OK
function mozillaSaveFile(filePath, content)
{
	if(window.Components)
		try
			{
			netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
			var file = Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile);
			file.initWithPath(filePath);
			if (!file.exists())
				file.create(0, 0664);
			var out = Components.classes["@mozilla.org/network/file-output-stream;1"].createInstance(Components.interfaces.nsIFileOutputStream);
			out.init(file, 0x20 | 0x02, 00004,null);
			out.write(content, content.length);
			out.flush();
			out.close();
			return(true);
			}
		catch(e)
			{
			//alert("Exception while attempting to save\n\n" + e);
			return(false);
			}
	return(null);
}

// Returns null if it can't do it, false if there's an error, or a string of the content if successful
function mozillaLoadFile(filePath)
{
	if(window.Components)
		try
			{
			netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
			var file = Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile);
			file.initWithPath(filePath);
			if (!file.exists())
				return(null);
			var inputStream = Components.classes["@mozilla.org/network/file-input-stream;1"].createInstance(Components.interfaces.nsIFileInputStream);
			inputStream.init(file, 0x01, 00004, null);
			var sInputStream = Components.classes["@mozilla.org/scriptableinputstream;1"].createInstance(Components.interfaces.nsIScriptableInputStream);
			sInputStream.init(inputStream);
			return(sInputStream.read(sInputStream.available()));
			}
		catch(e)
			{
			//alert("Exception while attempting to load\n\n" + e);
			return(false);
			}
	return(null);
}

function safariFilenameToUrl(filename) {
	return ("file://" + filename);
}

function safariLoadFile(url)
{
	url = safariFilenameToUrl(url);
	var plugin = document.embeds["tiddlyWikiSafariSaver"];
	return plugin.readURL(url);
}

function safariSaveFile(url,content)
{
	url = safariFilenameToUrl(url);
	var plugin = document.embeds["tiddlyWikiSafariSaver"];
	return plugin.writeStringToURL(content,url);
}

// Lifted from http://developer.apple.com/internet/webcontent/detectplugins.html
function detectPlugin()
{
	var daPlugins = detectPlugin.arguments;
	var pluginFound = false;
	if (navigator.plugins && navigator.plugins.length > 0)
		{
		var pluginsArrayLength = navigator.plugins.length;
		for (pluginsArrayCounter=0; pluginsArrayCounter < pluginsArrayLength; pluginsArrayCounter++ )
			{
			var numFound = 0;
			for(namesCounter=0; namesCounter < daPlugins.length; namesCounter++)
				{
				if( (navigator.plugins[pluginsArrayCounter].name.indexOf(daPlugins[namesCounter]) >= 0) || 
						(navigator.plugins[pluginsArrayCounter].description.indexOf(daPlugins[namesCounter]) >= 0) )
					numFound++;
				}
			if(numFound == daPlugins.length)
				{
				pluginFound = true;
				break;
				}
			}
	}
	return pluginFound;
}

// ---------------------------------------------------------------------------------
// Event handlers
// ---------------------------------------------------------------------------------

function onEditKey(e)
{
	if (!e) var e = window.event;
	clearMessage();
	var consume = false;
	switch(e.keyCode)
		{
		case 13: // Ctrl-Enter
		case 10: // Ctrl-Enter on IE PC
		case 77: // Ctrl-Enter is "M" on some platforms
			if(e.ctrlKey && this.id && this.id.substr(0,13) == "editorWrapper")
				{
				blurTiddler(this.id.substr(13));
				saveTiddler(this.id.substr(13));
				consume = true;
				}
			break;
		case 27: // Escape
			if(this.id && this.id.substr(0,13) == "editorWrapper")
				{
				blurTiddler(this.id.substr(13));
				displayTiddler(null,this.id.substr(13),1,null,null,false,false);
				consume = true;
				}
			break;
		}
	e.cancelBubble = consume;
	if(consume)
		if (e.stopPropagation) e.stopPropagation();
	return(!consume);

}

// Event handler for clicking on a tiddly link
function onClickTiddlerLink(e)
{
	if (!e) var e = window.event;
	var theTarget = resolveTarget(e);
	var theLink = theTarget;
	var title = null;
	do {
		title = theLink.getAttribute("tiddlyLink");
		theLink = theLink.parentNode;
	} while(title == null && theLink != null);
	if(title)
		{
		var toggling = e.metaKey || e.ctrlKey;
		if(config.options.chkToggleLinks)
			toggling = !toggling;
		var opening;
		if(toggling && document.getElementById("tiddler" + title))
			closeTiddler(title,e.shiftKey || e.altKey);
		else
			displayTiddler(theTarget,title,0,null,null,true,e.shiftKey || e.altKey);
		}
	clearMessage();
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
	return(false);
}

// Event handler for mouse over a tiddler
function onMouseOverTiddler(e)
{
	var tiddler;
	if(this.id.substr(0,7) == "tiddler")
		tiddler = this.id.substr(7);
	if(tiddler)
		selectTiddler(tiddler);
}

// Event handler for mouse out of a tiddler
function onMouseOutTiddler(e)
{
	var tiddler;
	if(this.id.substr(0,7) == "tiddler")
		tiddler = this.id.substr(7);
	if(tiddler)
		deselectTiddler(tiddler);
}

// Event handler for double click on a tiddler
function onDblClickTiddler(e)
{
	if(!readOnly)
		{
		clearMessage();
		if(document.selection)
			document.selection.empty();
		var tiddler;
		if(this.id.substr(0,7) == "tiddler")
			tiddler = this.id.substr(7);
		if(tiddler)
			displayTiddler(null,tiddler,2,null,null,false,false);
		}
}

// Event handler for clicking on toolbar close
function onClickToolbarClose(e)
{
	if (!e) var e = window.event;
	clearMessage();
	if(this.parentNode.id)
		closeTiddler(this.parentNode.id.substr(7),e.shiftKey || e.altKey);
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
	return(false);
}

// Event handler for clicking on toolbar permalink
function onClickToolbarPermaLink(e)
{
	if(this.parentNode.id)
		{
		var title = this.parentNode.id.substr(7);
		var t = encodeURIComponent(String.encodeTiddlyLink(title));
		if(window.location.hash != t)
			window.location.hash = t;
		}
}

// Event handler for clicking on toolbar close
function onClickToolbarDelete(e)
{
	clearMessage();
	if(this.parentNode.id)
		deleteTiddler(this.parentNode.id.substr(7));
}

// Event handler for clicking on the toolbar references button
function onClickToolbarReferences(e)
{
	if (!e) var e = window.event;
	var theTarget = resolveTarget(e);
	var popup = createTiddlerPopup(this);
	if(popup && this.parentNode.id)
		{
		var title = this.parentNode.id.substr(7);
		var references = store.getReferringTiddlers(title);
		var c = false;
		for(var r=0; r<references.length; r++)
			if(references[r].title != title)
				{
				createTiddlyLink(popup,references[r].title,true);
				c = true;
				}
		if(!c)
			popup.appendChild(document.createTextNode(config.views.wikified.toolbarReferences.popupNone));
		}
	scrollToTiddlerPopup(popup,false);
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
	return(false);
}

// Event handler for clicking on a tiddler tag
function onClickTag(e)
{
	if (!e) var e = window.event;
	var theTarget = resolveTarget(e);
	var popup = createTiddlerPopup(this);
	var tag = this.getAttribute("tag");
	var title = this.getAttribute("tiddler");
	if(popup && tag)
		{
		var tagged = store.getTaggedTiddlers(tag);
		var c = false;
		for(var r=0;r<tagged.length;r++)
			if(tagged[r].title != title)
				{
				createTiddlyLink(popup,tagged[r].title,true);
				c = true;
				}
		var lingo = config.views.wikified.tag;
		if(c)
			{
			popup.insertBefore(document.createElement("hr"),popup.firstChild);
			var openAll = createTiddlyButton(null,lingo.openAllText.format([tag]),lingo.openAllTooltip,onClickTagOpenAll);
			openAll.setAttribute("tag",tag);
			popup.insertBefore(openAll,popup.firstChild);
			}
		else
			popup.appendChild(document.createTextNode(lingo.popupNone.format([tag])));
		}
	scrollToTiddlerPopup(popup,false);
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
	return(false);
}

// Event handler for 'open all' on a tiddler popup
function onClickTagOpenAll(e)
{
	if (!e) var e = window.event;
	var tag = this.getAttribute("tag");
	var tagged = store.getTaggedTiddlers(tag);
	for(var t=tagged.length-1; t>=0; t--)
		displayTiddler(this,tagged[t].title,0,null,null,false,e.shiftKey || e.altKey);
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
	return(false);
}

// Event handler for clicking on the 'add tag' button
function onClickAddTag(e)
{
	if (!e) var e = window.event;
	var theTarget = resolveTarget(e);
	var popup = createTiddlerPopup(this);
	var tiddler = this.getAttribute("tiddler");
	var tags = store.getTags();
	var lingo = config.views.editor.tagChooser;
	if(tags.length == 0)
		createTiddlyElement(popup,"div",null,null,lingo.popupNone);
	for (t=0; t<tags.length; t++)
		{
		var theTag = createTiddlyButton(popup,tags[t][0],lingo.tagTooltip.format([tags[t][0]]),onClickAddTagPopup);
		theTag.setAttribute("tag",tags[t][0]);
		theTag.setAttribute("tiddler",tiddler);
		}
	scrollToTiddlerPopup(popup,false);
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
	return(false);
}

// Event handler for clicking on a tag in the 'add tag' popup
function onClickAddTagPopup(e)
{
	if (!e) var e = window.event;
	var theTarget = resolveTarget(e);
	var tiddler = this.getAttribute("tiddler");
	var tag = this.getAttribute("tag");
	var tagsBox = document.getElementById("editorTags" + tiddler);
	if(tagsBox)
		tagsBox.value += " " + String.encodeTiddlyLink(tag);
	e.cancelBubble = true;
	if (e.stopPropagation) e.stopPropagation();
	return(false);
}

// Event handler for clicking on toolbar close
function onClickToolbarEdit(e)
{
	clearMessage();
	if(this.parentNode.id)
		displayTiddler(null,this.parentNode.id.substr(7),2,null,null,false,false);
}

// Event handler for clicking on toolbar save
function onClickToolbarSave(e)
{
	if(this.parentNode.id)
		saveTiddler(this.parentNode.id.substr(7));
}

// Event handler for clicking on toolbar save
function onClickToolbarUndo(e)
{
	if(this.parentNode.id)
		displayTiddler(null,this.parentNode.id.substr(7),1,null,null,false,false);
}

// Eek... it's bad that this is done via a function rather than a normal, copy-able href
function onClickPermaView()
{
	var tiddlerDisplay = document.getElementById("tiddlerDisplay");
	var links = [];
	for(var t=0;t<tiddlerDisplay.childNodes.length;t++)
		{
		var tiddlerName = tiddlerDisplay.childNodes[t].id.substr(7);
		links.push(String.encodeTiddlyLink(tiddlerName));
		}
	window.location.hash = encodeURIComponent(links.join(" "));
}

// ---------------------------------------------------------------------------------
// Animation engine
// ---------------------------------------------------------------------------------

function Animator()
{
	this.running = 0; // Incremented at start of each animation, decremented afterwards. If zero, the interval timer is disabled
	this.timerID; // ID of the timer used for animating
	this.animations = []; // List of animations in progress
	return this;
}

// Start animation engine
Animator.prototype.startAnimating = function() // Variable number of arguments
{
	for(var t=0; t<arguments.length; t++)
		this.animations.push(arguments[t]);
	if(this.running == 0)
		{
		var me = this;
		this.timerID = window.setInterval(function() {me.doAnimate(me);},25);
		}
	this.running += arguments.length;
}

// Perform an animation engine tick, calling each of the known animation modules
Animator.prototype.doAnimate = function(me)
{
	var a = 0;
	while(a<me.animations.length)
		{
		var animation = me.animations[a];
		animation.progress += animation.step;
		if(animation.progress < 0 || animation.progress > 1)
			{
			animation.stop();
			me.animations.splice(a,1);
			if(--me.running == 0)
				window.clearInterval(me.timerID);
			}
		else
			{
			animation.tick();
			a++;
			}
		}
}

// Map a 0..1 value to 0..1, but slow down at the start and end
Animator.slowInSlowOut = function(progress)
{
	return(1-((Math.cos(progress * Math.PI)+1)/2));
}

// ---------------------------------------------------------------------------------
// Zoomer animation
// ---------------------------------------------------------------------------------

function Zoomer(text,startElement,targetElement,slowly)
{
	this.element = document.createElement("div");
	this.element.appendChild(document.createTextNode(text));
	this.element.className = "zoomer";
	document.body.appendChild(this.element);
	this.startElement = startElement;
	this.startLeft = findPosX(this.startElement);
	this.startTop = findPosY(this.startElement);
	this.startWidth = this.startElement.offsetWidth;
	this.startHeight = this.startElement.offsetHeight;
	this.targetElement = targetElement;
	this.targetLeft = findPosX(this.targetElement);
	this.targetTop = findPosY(this.targetElement);
	this.targetWidth = this.targetElement.offsetWidth;
	this.targetHeight = this.targetElement.offsetHeight;
	this.progress = 0;
	this.step = slowly ? config.animSlow : config.animFast;
	this.targetElement.style.opacity = 0;
	return this;
}

Zoomer.prototype.stop = function()
{
	this.element.parentNode.removeChild(this.element);
	this.targetElement.style.opacity = 1;
}

Zoomer.prototype.tick = function()
{
	var f = Animator.slowInSlowOut(this.progress);
	this.element.style.left = this.startLeft + (this.targetLeft-this.startLeft) * f + "px";
	this.element.style.top = this.startTop + (this.targetTop-this.startTop) * f + "px";
	this.element.style.width = this.startWidth + (this.targetWidth-this.startWidth) * f + "px";
	this.element.style.height = this.startHeight + (this.targetHeight-this.startHeight) * f + "px";
	this.element.style.display = "block";
	this.targetElement.style.opacity = this.progress;
	this.targetElement.style.filter = "alpha(opacity:" + this.progress * 100 + ")";
}

// ---------------------------------------------------------------------------------
// Scroller animation
// ---------------------------------------------------------------------------------

function Scroller(targetElement,slowly)
{
	this.targetElement = targetElement;
	this.startScroll = findScrollY();
	this.targetScroll = ensureVisible(targetElement);
	this.progress = 0;
	this.step = slowly ? config.animSlow : config.animFast;
	return this;
}

Scroller.prototype.stop = function()
{
	window.scrollTo(0,this.targetScroll);
}

Scroller.prototype.tick = function()
{
	var f = Animator.slowInSlowOut(this.progress);
	window.scrollTo(0,this.startScroll + (this.targetScroll-this.startScroll) * f);
}

// ---------------------------------------------------------------------------------
// Slider animation
// ---------------------------------------------------------------------------------

// deleteMode - "none", "all" [delete target element and it's children], [only] "children" [but not the target element]
function Slider(element,opening,slowly,deleteMode)
{
	this.element = element;
	element.style.display = "block";
	this.deleteMode = deleteMode;
	this.element.style.height = "auto";
	this.realHeight = element.offsetHeight;
	this.opening = opening;
	this.step = slowly ? config.animSlow : config.animFast;
	if(opening)
		{
		this.progress = 0;
		element.style.height = "0px";
		element.style.display = "block";
		}
	else
		{
		this.progress = 1;
		this.step = -this.step;
		}
	element.style.overflow = "hidden";
	return this;
}

Slider.prototype.stop = function()
{
	if(this.opening)
		this.element.style.height = "auto";
	else
		{
		switch(this.deleteMode)
			{
			case "none":
				this.element.style.display = "none";
				break;
			case "all":
				this.element.parentNode.removeChild(this.element);
				break;
			case "children":
				removeChildren(this.element);
				break;
			}
		}
}

Slider.prototype.tick = function()
{
	var f = Animator.slowInSlowOut(this.progress);
	var h = this.realHeight * f;
	this.element.style.height = h + "px";
	this.element.style.opacity = f;
}

// ---------------------------------------------------------------------------------
// Augmented methods for the JavaScript Number(), Array() and String() objects
// ---------------------------------------------------------------------------------

// Clamp a number to a range
Number.prototype.clamp = function(min,max)
{
	c = this;
	if(c < min)
		c = min;
	if(c > max)
		c = max;
	return c;
}

// Find an entry in an array. Returns the array index or null
Array.prototype.find = function(item)
{
	var p = null;
	for(var t=0; t<this.length; t++)
		if(this[t] == item)
			{
			p = t;
			break;
			}
	return p;
}

// Push a new value into an array only if it is not already present in the array. If the optional unique parameter is false, it reverts to a normal push
Array.prototype.pushUnique = function(item,unique)
{
	if(unique != undefined && unique == false)
		this.push(item);
	else
		{
		if(this.find(item) == null)
			this.push(item);
		}
}

// Get characters from the right end of a string
String.prototype.right = function(n)
{
	if(n < this.length)
		return this.slice(this.length-n);
	else
		return this;
}

// Trim whitespace from both ends of a string
String.prototype.trim = function()
{
	var regexpTrim = new RegExp("^\\s*(.*)\\s*$","mg");
	return(this.replace(regexpTrim,"$1"));
}

// Substitute substrings from an array into a format string that includes '%1'-type specifiers
String.prototype.format = function(substrings)
{
	var subRegExp = new RegExp("(?:%(\\d+))","mg");
	var currPos = 0;
	var r = [];
	do {
		var match = subRegExp.exec(this);
		if(match && match[1])
			{
			if(match.index > currPos)
				r.push(this.substring(currPos,match.index));
			r.push(substrings[parseInt(match[1])]);
			currPos = subRegExp.lastIndex;
			}
	} while(match);
	if(currPos < this.length)
		r.push(this.substring(currPos,this.length));
	return r.join("");
}

// Escape any special RegExp characters with that character preceded by a backslash
String.prototype.escapeRegExp = function()
{
	return(this.replace(new RegExp("[\\\\\\^\\$\\*\\+\\?\\(\\)\\=\\!\\|\\,\\{\\}\\[\\]\\.]","g"),"\\$&"));
}

// Convert & to "&amp;", < to "&lt;", > to "&gt;" and " to "&quot;"
String.prototype.htmlEncode = function()
{
	var regexpAmp = new RegExp("&","mg");
	var regexpLessThan = new RegExp("<","mg");
	var regexpGreaterThan = new RegExp(">","mg");
	var regexpQuote = new RegExp("\"","mg");
	return(this.replace(regexpAmp,"&amp;").replace(regexpLessThan,"&lt;").replace(regexpGreaterThan,"&gt;").replace(regexpQuote,"&quot;"));
}

// Process a string list of macro parameters into an array. Parameters can be quoted with "", '', [[]] or left unquoted (and therefore space-separated)
String.prototype.readMacroParams = function()
{
	var regexpMacroParam = new RegExp("(?:\\s*)(?:(?:\"([^\"]*)\")|(?:'([^']*)')|(?:\\[\\[([^\\]]*)\\]\\])|([^\"'\\s]\\S*))","mg");
	var params = [];
	do {
		var match = regexpMacroParam.exec(this);
		if(match)
			{
			if(match[1]) // Double quoted
				params.push(match[1]);
			else if(match[2]) // Single quoted
				params.push(match[2]);
			else if(match[3]) // Double-square-bracket quoted
				params.push(match[3]);
			else if(match[4]) // Unquoted
				params.push(match[4]);
			}
	} while(match);
	return params;
}

// Process a string list of tiddler names into an array. Tiddler names that have spaces in them must be [[bracketed]]
String.prototype.readBracketedList = function(unique)
{
	var bracketedPattern = "\\[\\[([^\\]]+)\\]\\]";
	var unbracketedPattern = "[^\\s$]+";
	var pattern = "(?:" + bracketedPattern + ")|(" + unbracketedPattern + ")";
	var re = new RegExp(pattern,"mg");
	var tiddlerNames = [];
	do {
		var match = re.exec(this);
		if(match)
			{
			if(match[1]) // Bracketed
				tiddlerNames.pushUnique(match[1],unique);
			else if(match[2]) // Unbracketed
				tiddlerNames.pushUnique(match[2],unique);
			}
	} while(match);
	return(tiddlerNames);
}

// Static method to bracket a string with double square brackets if it contains a space
String.encodeTiddlyLink = function(title)
{
	if(title.indexOf(" ") == -1)
		return(title);
	else
		return("[[" + title + "]]");
}

// Static method to left-pad a string with 0s to a certain width
String.zeroPad = function(n,d)
{
	var s = n.toString();
	if(s.length < d)
		s = "000000000000000000000000000".substr(0,d-s.length) + s;
	return(s);
}

// ---------------------------------------------------------------------------------
// RGB colour object
// ---------------------------------------------------------------------------------

// Construct an RGB colour object from a '#rrggbb' or 'rgb(n,n,n)' string or from separate r,g,b values
function RGB(r,g,b)
{
	this.r = 0;
	this.g = 0;
	this.b = 0;
	if(typeof r == "string")
		{
		if(r.substr(0,1) == "#")
			{
			this.r = parseInt(r.substr(1,2),16)/255;
			this.g = parseInt(r.substr(3,2),16)/255;
			this.b = parseInt(r.substr(5,2),16)/255;
			}
		else
			{
			var rgbPattern = /rgb\s*\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*\)/ ;
			var c = r.match(rgbPattern);
			if (c)
				{
				this.r = parseInt(c[1],10)/255;
				this.g = parseInt(c[2],10)/255;
				this.b = parseInt(c[3],10)/255;
				}
			}
		}
	else
		{
		this.r = r;
		this.g = g;
		this.b = b;
		}
	return this;
}

// Mixes this colour with another in a specified proportion
// c = other colour to mix
// f = 0..1 where 0 is this colour and 1 is the new colour
// Returns an RGB object
RGB.prototype.mix = function(c,f)
{
	return new RGB(this.r + (c.r-this.r) * f,this.g + (c.g-this.g) * f,this.b + (c.b-this.b) * f);
}

// Return an rgb colour as a #rrggbb format hex string
RGB.prototype.toString = function()
{
	var r = this.r.clamp(0,1);
	var g = this.g.clamp(0,1);
	var b = this.b.clamp(0,1);
	return("#" + ("0" + Math.floor(r * 255).toString(16)).right(2) +
				 ("0" + Math.floor(g * 255).toString(16)).right(2) +
				 ("0" + Math.floor(b * 255).toString(16)).right(2));
}

// ---------------------------------------------------------------------------------
// Augmented methods for the JavaScript Date() object
// ---------------------------------------------------------------------------------

// Substitute date components into a string
Date.prototype.formatString = function(template)
{
	template = template.replace("YYYY",this.getFullYear());
	template = template.replace("YY",String.zeroPad(this.getFullYear()-2000,2));
	template = template.replace("MMM",config.messages.dates.months[this.getMonth()]);
	template = template.replace("0MM",String.zeroPad(this.getMonth()+1,2));
	template = template.replace("MM",this.getMonth()+1);
	template = template.replace("DDD",config.messages.dates.days[this.getDay()]);
	template = template.replace("0DD",String.zeroPad(this.getDate(),2));
	template = template.replace("DD",this.getDate());
	template = template.replace("hh",this.getHours());
	template = template.replace("mm",this.getMinutes());
	template = template.replace("ss",this.getSeconds());
	return template;
}

// Convert a date to UTC YYYYMMDDHHMM string format
Date.prototype.convertToYYYYMMDDHHMM = function()
{
	return(String.zeroPad(this.getFullYear(),4) + String.zeroPad(this.getMonth()+1,2) + String.zeroPad(this.getDate(),2) + String.zeroPad(this.getHours(),2) + String.zeroPad(this.getMinutes(),2));
}

// Convert a date to UTC YYYYMMDD.HHMMSSMMM string format
Date.prototype.convertToYYYYMMDDHHMMSSMMM = function()
{
	return(String.zeroPad(this.getFullYear(),4) + String.zeroPad(this.getMonth()+1,2) + String.zeroPad(this.getDate(),2) + "." + String.zeroPad(this.getHours(),2) + String.zeroPad(this.getMinutes(),2) + String.zeroPad(this.getSeconds(),2) + String.zeroPad(this.getMilliseconds(),4));
}

// Static method to create a date from a UTC YYYYMMDDHHMM format string
Date.convertFromYYYYMMDDHHMM = function(d)
{
	var theDate = new Date(parseInt(d.substr(0,4),10),
							parseInt(d.substr(4,2),10)-1,
							parseInt(d.substr(6,2),10),
							parseInt(d.substr(8,2),10),
							parseInt(d.substr(10,2),10),0,0);
	return(theDate);
}

// ---------------------------------------------------------------------------------
// DOM utilities - many derived from www.quirksmode.org 
// ---------------------------------------------------------------------------------

function createTiddlyElement(theParent,theElement,theID,theClass,theText)
{
	var e = document.createElement(theElement);
	if(theClass != null)
		e.className = theClass;
	if(theID != null)
		e.setAttribute("id",theID);
	if(theText != null)
		e.appendChild(document.createTextNode(theText));
	if(theParent != null)
		theParent.appendChild(e);
	return(e);
}

function createTiddlyButton(theParent,theText,theTooltip,theAction,theClass,theId)
{
	var theButton = document.createElement("a");
	theButton.className = "button";
	if(theAction)
		{
		theButton.onclick = theAction;
		theButton.setAttribute("href","JavaScript:;");
		}
	theButton.setAttribute("title",theTooltip);
	if(theText)
		theButton.appendChild(document.createTextNode(theText));
	if(theClass)
		theButton.className = theClass;
	if(theId)
		theButton.id = theId;
	if(theParent)
		theParent.appendChild(theButton);
	return(theButton);
}

function createTiddlyLink(place,title,includeText)
{
	var text = includeText ? title : null;
	var subTitle;
	var tiddler = store.tiddlers[title];
	if(tiddler)
		subTitle = tiddler.getSubtitle();
	else
		subTitle = config.messages.undefinedTiddlerToolTip.format([title]);
	var theClass = tiddler ? "tiddlyLinkExisting tiddlyLink" : "tiddlyLinkNonExisting tiddlyLink";
	var btn = createTiddlyButton(place,text,subTitle,onClickTiddlerLink,theClass);
	btn.setAttribute("tiddlyLink",title);
	return(btn);
}

function createExternalLink(place,url)
{
	var theLink = document.createElement("a");
	theLink.className = "externalLink";
	theLink.href = url;
	theLink.title = config.messages.externalLinkTooltip.format([url]);
	if(config.options.chkOpenInNewWindow)
		theLink.target = "_blank";
	place.appendChild(theLink);
	return(theLink);
}

// Find the tiddler instance (if any) containing a specified element
function findContainingTiddler(e)
{
	if(e == null)
		return(null);
	do {
		if(e != document)
			{
			if(e.id)
				if(e.id.substr(0,7) == "tiddler")
					return(e);
			}
		e = e.parentNode;
	} while(e != document);
	return(null);
}

// Resolve the target object of an event
function resolveTarget(e)
{
	var obj;
	if (e.target)
		obj = e.target;
	else if (e.srcElement)
		obj = e.srcElement;
	if (obj.nodeType == 3) // defeat Safari bug
		obj = obj.parentNode;
	return(obj);
}

// Return the content of an element as plain text with no formatting
function getElementText(elementID)
{
	var e = document.getElementById(elementID);
	var text = "";
	if(e.innerText)
		text = e.innerText;
	else if(e.textContent)
		text = e.textContent;
	return text;
}

// Get the scroll position for window.scrollTo necessary to scroll a given element into view
function ensureVisible(e)
{
	var posTop = findPosY(e);
	var posBot = posTop + e.offsetHeight;
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</head>
<body onload="main();" onunload="checkUnsavedChanges();">
	<script>
	if (detectPlugin("TiddlyWiki Saver"))
		{
		document.write('<embed style="display: none" name="tiddlyWikiSafariSaver" width="0" height="0" type="application/x-webkit-tiddlywiki-saver"></embed>'); 
		saveUsingSafari = true;
		}
	</script>
	<div id="copyright">
	Welcome to TiddlyWiki by Jeremy Ruston, Copyright &copy; 2005 Osmosoft Limited
	</div>
	<noscript>
		<div id="javascriptWarning">This page requires JavaScript to function properly</div>
	</noscript>
	<div id="saveTest"></div>
	<div id="contentWrapper">
		<div id="header">
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				<span id="siteTitle"></span>
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	</div>
	<div id="storeArea"><div tiddler="ManualConvertUnicodeToUTF8" modified="200509211330" modifier="YourName" tags="systemConfig">window.manualConvertUnicodeToUTF8 = function (s)\n{\n var re=/[^\su0000-\su007F]/g ;\n return( s.replace( re, function( $0 ) { return( &quot;&amp;#&quot; +\n$0.charCodeAt(0).toString() + &quot;;&quot; ) ; }));\n\n}</div>
<div tiddler="DefaultTiddlers" modified="200509211635" modifier="YourName" tags="systemTiddlers">[[Introduction]]</div>
<div tiddler="_CloseOthers" modified="200509211952" modifier="UlfWiger" tags="systemConfig">\nfunction onClickToolbarCloseOthers(e) {\nif (!e) var e = window.event;\noldVal = config.options.chkAnimate;\nconfig.options.chkAnimate = false;\ncloseAllTiddlers();\nif(this.parentNode.id) {\nvar title = this.parentNode.id.substr(7);\ndisplayTiddler(e.target,title,0);\n}\nconfig.options.chkAnimate = oldVal;\n}\n\nfunction addCloseOthersButton(ignored, args) {\nvar theToolbar = document.getElementById(&quot;toolbar&quot; + args[0]);\nif(theToolbar) {\nif(!args[1]) {\ncreateTiddlyButton(theToolbar, &quot;close others&quot;, &quot;close others&quot;, onClickToolbarCloseOthers);\ninsertSpacer(theToolbar);\n}\n}\n\nreturn args;\n}\n\nAspects.addAfter(this, &quot;createTiddlerToolbar&quot;, addCloseOthersButton);</div>
<div tiddler="_.FunctionDecorator" modified="200509211956" modifier="UlfWiger" tags="systemConfig">//Thanks to Roman Porotnikov\n//http:www.jroller.com/page/deep/20030701\n\n//NB this systemConfig needs to be evaluated before other ones \n//that use the Aspects so the name starts with &quot;.&quot;\n//since they're loaded alphabetically\n//should really put it into the main source code, but\n//wanted to keep everything upgrade-proof\n\nAspects = new Object();\n\nAspects.addBefore = function(obj, fname, before) {\nvar oldFunc = obj[fname];\nobj[fname] = function() {\nreturn oldFunc.apply(this, before(arguments, oldFunc, this));\n};\n};\n\nAspects.addAfter = function(obj, fname, after) {\nvar oldFunc = obj[fname];\nobj[fname] = function() {\nreturn after(oldFunc.apply(this, arguments), arguments, oldFunc, this);\n};\n};\n\nAspects.addAround = function(obj, fname, around) {\nvar oldFunc = obj[fname];\nobj[fname] = function() {\nreturn around(arguments, oldFunc, this);\n};\n};</div>
<div tiddler="_BackupDirectory" modified="200509212143" modifier="UlfWiger" tags="systemConfig">///////////////////////////////////////////////////////////////\n// Requires http://www.digitaldimsum.co.uk/#_.FunctionDecorator\n///////////////////////////////////////////////////////////////\nconfig.options.txtBackupDir = &quot;backup&quot;;\nconfig.shadowTiddlers.AdvancedOptions += &quot;\sn\sn Backup Subdirectory: &lt;&lt;option txtBackupDir&gt;&gt;\sn &quot;;\n\nfunction alterBackupDir(args) {\n var path = args[0];\n var re = new RegExp(&quot;\s.[0-9]+\s.html&quot;);\n if (re.test(path)) {\n var backSlash = true;\n var dirPathPos = path.lastIndexOf(&quot;\s\s&quot;);\n if (dirPathPos == -1) {\n dirPathPos = path.lastIndexOf(&quot;/&quot;);\n backSlash = false;\n }\n var backupPath = path.substr(0,dirPathPos) + (backSlash ? &quot;\s\s&quot; : &quot;/&quot;);\n backupPath += config.options.txtBackupDir + path.substr(dirPathPos, path.length - dirPathPos);\n \n args[0] = backupPath;\n }\n return args;\n}\n\nAspects.addBefore(this,&quot;saveFile&quot;,alterBackupDir);\n</div>
<div tiddler="TiddlyWiki" modified="200509220854" modifier="UlfWiger" tags="">See [[TiddlyWiki.com|http://www.tiddlywiki.com]] for descriptions, examples, and tutorials on TiddlyWiki.\n\nIf you want to create your own TiddlyWiki page, you can start by saving a copy of [[this file|http://avweb.etxb.ericsson.se/~etxuwig/empty_tiddlywiki.html]].\n</div>
<div tiddler="SiteTitle" modified="200601262130" modifier="UlfWiger" tags="systemTiddlers">RDBMS</div>
<div tiddler="SiteSubtitle" modified="200601262131" modifier="UlfWiger" tags="systemTiddlers">A relational database layer on top of Mnesia</div>
<div tiddler="SiteUrl" modified="200601262131" modifier="UlfWiger" tags="systemTiddlers"></div>
<div tiddler="What is rdbms?" modified="200602101117" modifier="UlfWiger" tags="">'Rdbms' is mainly a mnesia activity module for Mnesia that adds support for constraint checking.\n\nMnesia is a robust distributed DBMS, but it performs very little validation on the actual data. Basically, the only things that it does validate (apart from ensuring ACID properties, which is no small thing) is that the record tag and number of attributes are correct. There is no support for verifying the type of data, or indeed to check relations between different tables.\n\n'Rdbms' does this, in a way that is almost totally transparent to the Mnesia user. It supports definition and validation of type, bounds, access rights, and relational constraints.</div>
<div tiddler="Introduction" modified="200602101120" modifier="UlfWiger" tags="">This document describes the 'rdbms' add-on to Mnesia. I've decided to arrange it as a TiddlyWiki in order to attempt a [[User Guide]], [[Reference Manual]], [[design log]], and [[tutorials]] in one single document. We'll se how it goes.\n\nA good starting point is [[What is rdbms?]]\n</div>
<div tiddler="update_on_read" modified="200602141700" modifier="UlfWiger" tags="todo">in ''rdbms_index''. For example, read-only file system tables would be difficult to index. If one were to allow &quot;partially complete&quot; indexes, one could allow ''update_on_read'' indexes. Basically, one would [[rebuild_index]] once, and then refresh a portion of the index every time an object is read. This will not guarantee that the index is up to date, but should keep it mostly accurate, as long as updates are reasonably rare.\n</div>
<div tiddler="rebuild_indexes" modified="200602141703" modifier="UlfWiger" tags="todo">In [[module rdbms_index_load]], there is code for creating an index table on the fly. We should perhaps have a function, ''rebuild_indexes'', that does the same thing on demand for existing indexes.</div>
<div tiddler="module rdbms_index_load" modified="200602141707" modifier="UlfWiger" tags="reference rdbms_index_load.erl">This module is a callback for the mnesia_schema:do_restore/1 function, which is used by [[module rdbms_index]] in order to (re-)build an index at runtime. The reason for doing it this way, is that normal writes are not allowed within a schema transaction (which, for various reasons, is probably a good thing.)</div>
<div tiddler="Reference Manual" modified="200602211005" modifier="UlfWiger" tags="reference">[[Data model]]\n\nThe following API functions exist in rdbms:\n- [[module rdbms]]\n- [[module rdbms_index]]\n- [[module rdbms_props]]\n- [[module rdbms_mailmerge]]\n- [[module rdbms_wsearch]]</div>
<div tiddler="Data model" modified="200602221641" modifier="UlfWiger" tags="reference">''Rdbms'' metadata can be specified while creating tables, using the following functions in [[module rdbms]]:\n&lt;&lt;&lt;\nrdbms:create_table(Name, Options) % where Options = [{K,V}], rdbms metadata given as {rdbms, Properties}\nrdbms:do_create_table(Name, Options) \n&lt;&lt;&lt;\n\nand for existing tables using the following functions in [[module rdbms_props]]:\n\n&lt;&lt;&lt;\nset_property(Tab, Key, Value)\ndo_set_property(Tab, Key, Value)\nset_global_type(Class, Name, Value)\ndo_set_global_type(Class, Name, Value)\n&lt;&lt;&lt;\n\nThe following types of table metadata can be specified:\n- [[references]]\n- [[acl]]\n- [[verify]]\n- [[{typedef, Name}]]\n- [[{attr, Attr, Prop}]]\n</div>
<div tiddler="{attr, Attr, Prop}" modified="200602222041" modifier="UlfWiger" tags="reference type">This defines an attribute property for the given table (or a global attribute property).\n\nFor a table property, ''Attr'' must refer to an existing attribute in the table, or to a &quot;compound_attribute&quot; (see below).\n\nThe following properties can be specified for table attributes:\n\n- ''type'' - see [[attribute types]]\n- ''required'' - ''true | false''\n- ''key_type'' - ''primary | secondary | none''\n- ''default'' - ''{'value', term()} | {'auto', {M, F}}'')</div>
<div tiddler="Ongoing work" modified="200602222054" modifier="UlfWiger" tags="todo">- [[rebuild_indexes]], [[update_on_read]]\n- [[optimize type checks]]\n- [[rdbms_rofs]]</div>
<div tiddler="optimize type checks" modified="200602222059" modifier="UlfWiger" tags="">There is some code in [[module rdbms_props]] that normalizes type definitions. Part of the purpose is to expand all typedefs, but another reason is to try to simplify the type expressions. Obviously, e.g. {list, {'or', [..., any]}} can be simplified to {list, any}, which means that the list elements do not 't have to be inspected. This code lacks sophistication (to say the least), and could be made much better.\n\nBTW, should {list, any} be read as &quot;a non-empty list&quot;, or &quot;any list, including nil&quot;? I think I prefer the former, since we have no other good expression for non-empty list.</div>
<div tiddler="complex type" modified="200602261838" modifier="YourName" tags="reference type">&lt;&lt;&lt;\n''type'' = builtinType | complexType | altType\n''logicalType'' = {logicalOp, [type]} | {'not', type} | 'true' | 'false'\n''logicalOp'' = 'and' | 'or' | 'andalso' | 'orelse'\n''comType'' = {compOp, value}\n''compOp'' = '==' | '=/=' | '&gt;' | '&lt;' | '=&lt;' | '&gt;='\n''builtinType'' = 'atom' | 'string' | 'binary' | 'number' | 'integer' | 'float' | 'oid' | 'any' |\n 'list' | 'nil' | 'tuple' | 'function' | 'pid' | 'port' | 'reference'\n''complexType'' = tupleType | listType | enumType\n''tupleType'' = {'tuple', [type]}\n''listType'' = {'list', type}\n''enumType'' = {'enum', [value]}\n&lt;&lt;&lt;\n\nSpecifically, ''{'and', []}'' and ''{'or',[]}'' are the same as ''no_type'', and \n- '''nil''' means the empty list\n- ''{'list', 'false'}'' is the same as '''nil'''\n- ''{'list', 'any'} and ''{'list', 'undefined'}'' both mean a non-empty list</div>
<div tiddler="attribute types" modified="200602261840" modifier="YourName" tags="reference type">The following types are supported by ''rdbms'':\n\n- ''undefined'' - specifically matches the value 'undefined'\n- ''no_type'' - is an internal representation for &quot;no type has been defined&quot;. It cannot be set.\n- ''any'' - means specifically that any value is allowed.\n- ''oid'' - built-in type for use as globally unique identifier. See [[oid]]\n- Simple builtin types (''atom, string, binary, number, integer, float, oid, any, pid, port, reference, list, nil, tuple, function, boolean'')\n- The distinct types 'true' and 'false'\n- [[global type]] (''{type, typeRef}'', see TypeDefs)\n- [[complex type]] (tuples or lists)\n</div>
<div tiddler="User Guide" modified="200602261857" modifier="YourName" tags="guide">This user guide covers the following topics\n- [[activating rdbms]]\n- [[specifying types]]\n- [[referential integrity]]\n- [[parameterized indexes]]\n- [[fragmented tables]]</div>
<div tiddler="MainMenu" modified="200603011143" modifier="UlfWiger" tags="systemTiddlers">[[Introduction]]\n[[What is rdbms?]]\n[[Reference Manual]]\n[[User Guide]]\n[[Ongoing work]]\nTiddlyWiki\n[[TiddlyWiki Tutorial|http://www.blogjones.com/TiddlyWikiTutorial.html]]\n\n\n&lt;&lt;newTiddler&gt;&gt;\n&lt;&lt;newJournal &quot;DD MMM YYYY&quot;&gt;&gt;</div>
<div tiddler="module rdbms_index" modified="200603011200" modifier="UlfWiger" tags="">The 'rdbms' library supports parameterized indexes. These indexes are regular mnesia tables, and index values are determined by a user-supplied callback function, which operates either on a single attribute, or on the whole object. This is the main difference between 'rdbms' indexes and mnesia indexes, for which the index value is always just the value of the identified attribute.\n\nThe 'rdbms' indexes can also be ''fragmented'', since they are regular mnesia tables. This should lead to better scalability in cluster databases.\n\nThe following types of index are supported:\n* ''bag'' - unordered indexes of the sort mnesia supports today (except for the differences mentioned above.)\n* ''ordered'' - ordered_set indexes where the key is {{{{~IndexValue, ~ObjectKey}}}}\n* ''set'' - like ''bag'', but with the restriction that the index value must be present in only one object.\n* ''weighted'' - also ordered_sets. The index function is expected to return {{{[{~IndexValue, Weight}]}}}, where {{{Weight}}} can be any term. The key in the index table becomes {{{{~IndexValue, Weight, ~ObjectKey}}}}</div>
<div tiddler="module rdbms" modified="200603011234" modifier="UlfWiger" tags="rdbms.erl reference">The rdbms module implements the actual activity module for mnesia. To enable rdbms, add the environment variable {{{{access_module, rdbms}}}} to Mnesia. It is also possible to select (or override) rdbms for each transaction through the function {{{mnesia:activity(Type, Fun, Args, Module)}}}.\n\nRdbms uses the naming convention that {{{do_xxxxx(...)}}} signifies a function that must be run within a schema transaction. Normally, there is one function that starts a schema transaction implicitly (e.g. {{{add_properties/1}}}, and a corresponding function that assumes an existing scheme transaction (e.g. {{{do_add_properties/1}}}). The idea is to be able to perform complex data initialization (possibly creating the entire database) within one transaction. Note, however, that Mnesia does not allow insertion of normal data within a schema transaction.\n\nFunctions:\n* [[rdbms:activity/1]]\n* [[rdbms:drop_references/1]], [[rdbms:do_drop_references/1]]\n* [[rdbms:load_schema/1]], [[rdbms:load_schema/2]]\n* [[rdbms:create_table/2]], [[rdbms:do_create_table/2]]\n* [[rdbms:delete_table/1]], [[rdbms:do_delete_table/1]]\n* [[rdbms:make_simple_form/1]]\n* [[rdbms:null_value/0]]</div>
<div tiddler="rdbms:null_value/0" modified="200603011239" modifier="UlfWiger" tags="rdbms.erl reference">{{{rdbms:null_value() -&gt; undefined}}}\n\nErlang doesn't have a proper {{{null}}} value, but the convention is to use the atom {{{undefined}}}.</div>
<div tiddler="rdbms:activity/1" modified="200603011240" modifier="UlfWiger" tags="rdbms.erl reference">{{{rdbms:activity(Fun)}}}\n\nEquvalent to {{{mnesia:activity(transaction, Fun, [], rdbms)}}}.\n\nStarts a mnesia transaction, using the 'rdbms' activity module. If mnesia has been started with the environment varliable {{{{access_module, rdbms}}}}, the function {{{mnesia:activity(transaction, Fun)}}} will also have the same effect. If another activity module is the default, {{{rdbms:activity(Fun)}}} will override the setting, and use 'rdbms' instead.</div>
<div tiddler="rdbms:create_table/2" modified="200603011241" modifier="UlfWiger" tags="">{{{rdbms:create_table(Tab, Options) -&gt; {atomic, ok} | {aborted, Reason}}}}\n\nWorks like {{{mnesia:create_table(Tab, Options)}}}, except that it accepts the additional option {{{{rdbms, ~RdbmsOptions}}}}.\n</div>
<div tiddler="module rdbms_props" modified="200603011258" modifier="UlfWiger" tags="rdbms_props.erl reference">The rdbms_props module contains functions for manipulating and accessing meta-data.\n\n* Table Properties\n** [[references]]\n** [[indexes]]\n** [[acl]]\n** [[read_filter]]\n** [[write_filter]]\n*Attribute Properties\n** [[{attr,Attr,type}]]\n** [[{attr,Attr,default}]]\n</div>
<div tiddler="activating rdbms" modified="200603011512" modifier="UlfWiger" tags="guide">''rdbms'' is activated whenever the {{{mnesia:activity()}}} function is called with ''rdbms'' as callback module. For example:\n\n&lt;&lt;&lt;\n{{{mnesia:activity(transaction, F, [], rdbms)}}}\n&lt;&lt;&lt;\n\nwhere F is the function to execute within the transaction.\n\n&lt;&lt;&lt;\nNote that the old {{{mnesia:transaction(F)}}} function _never_ uses any callback module other than the default (mnesia).\n&lt;&lt;&lt;\n\nAnother way to activate ''rdbms'' is to specify the mnesia environment variable {{{{access_module,rdbms}}}}. This can be done in three different ways.\n\n- from the command line: {{{erl ... -mnesia access_module rdbms}}}\n- from the sys.config file: {{{{mnesia, [{access_module, rdbms}]}}}}\n- by starting mnesia with {{{mnesia:start([{access_module,rdbms}])}}}\n\nWhen ''rdbms'' has been activated as the default access module, it can still be overridden using the mnesia:activity/4 function.</div>
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