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User:Cacycle/editor dev.js

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/* <pre><nowiki> */


/*

Comfortable JavaScript editor extension for Wikipedia edit pages by [[User:Cacycle]]
See [[User:Cacycle/Editor]] for a description and [[User:Cacycle/Editor.js]] for this code.
Features include:
* Regular expression search and replace
* Server-independent ''Show preview'' and ''Show changes''
* One-click fixing of common mistakes
* Undo/redo
* Input boxes with history
See [[User:Cacycle/Editor]] for an installation guide.
The program works only for the mozilla browsers Mozilla, Mozilla Firefox, and Mozilla SeaMonkey.
The code is currently under active development and might change rapidly.
This code has been released into the public domain.

*/


//
// configuration variables test
//

// levels of undo (each level holds the whole text)
var undoBufferMax = undoBufferMax || 20;

// style for preview box
var stylePreviewBox = stylePreviewBox || 'background-color: #f9f9f9;';

// style for custom edit buttons
var styleButtons = styleButtons || 'font-size: smaller; padding-left: 0.1em; padding-right: 0.1em; margin-left: 0.1em; margin-right: 0.1em; height: 1.6em; vertical-align: bottom;';

// formatting button options
var spacesAroundPipes = spacesAroundPipes || true;

// history length for summary, find and replace fields
var findHistoryLength = findHistoryLength || 10;

// presets for input field dropdown options
var presetOptions = presetOptions || [];
presetOptions['summary'] = presetOptions['summary'] || [
 'Copyedit',
 'Linkfix',
 'Reverting vandalism',
 'Formatting source text'
];

// expiration time span for history cookies in seconds
var cookieExpireSec = cookieExpireSec || (365 * 24 * 60 * 60);


// global variables

// history
var fieldHist = [];
var cookieName = [];
var inputElement = [];
var selectElement = [];

var checkMarker = [];
checkMarker[true] = '\u2022';
checkMarker[false] = '\u22c5';

// undo
var undoBuffer = new Array(undoBufferMax);
var undoBufferSelStart = new Array(undoBufferMax);
var undoBufferSelEnd = new Array(undoBufferMax);
var undoBufferFirst = 0;
var undoBufferLast = 0;
var undoBufferCurr = 0;

// fullscreen
var normalTextareaWidth;
var normalTextareaHeight;
var normalTextareaMargin;
var normalTextareaRows;
var normalPageXOffset;
var normalPageYOffset;
var normalTreePos = {};
var fullScreenMode = false;
var fullButtonValue = 'Full screen';
var fullButtonTitle = 'Full screen editing mode';
var normalButtonValue = 'Normal view';
var normalButtonTitle = 'Back no normal page view';
var normalFloatButtonValue = 'Back';

// counter
var i;
var j;


// load the editor after page loading
if (window.addOnloadHook != null) {
 addOnloadHook(SetupEditor);
}

//
// find and replace functions
//
function Edit(what) {

// add focus to textbox
 document.editform.wpTextbox1.focus();

// get the textarea object
 var textarea = document.editform.wpTextbox1;

// get the scroll position
 var scrollTopPx = textarea.scrollTop;
 var scrollHeightPx = textarea.scrollHeight;

// convert strange spaces, remove non-\n linebreak characters
 convertStrangeSpaces();

// get the text from the textbox
 var text = textarea.value;
 var textNew;

// get the find text
 var find = document.getElementById('findText');
 var findText = find.value;

// get the replace text
 var replace = document.getElementById('replaceText');
 var replaceText = replace.value;

// get checkboxes
 var caseSensitive = document.getElementById('caseSensitive');
 var regExp = document.getElementById('regExp');
 if (regExp == null) { return; }

// changed flags
 var textChanged = false;
 var posChanged = false;

// get the text selection info
 var startPos = textarea.selectionStart;
 var endPos = textarea.selectionEnd;
 var selected = text.substring(startPos, endPos);
 var startPosNew;
 var endPosNew;

// set cursor to position 0 if cursor has not already been set (better solution???)
 if ( (startPos == endPos) && (startPos == text.length) ) {
 textarea.selectionStart = 0;
 textarea.selectionEnd = 0;
 startPos = 0;
 endPos = 0;
 }

// manipulate selected text
 if (selected != '') {

// lowercase selection
 if ('lowercase'.indexOf(what) >= 0) {
 var selectedNew = selected.toLowerCase();
 textNew = text.substring(0, startPos) + selectedNew + text.substring(endPos);
 startPosNew = startPos;
 endPosNew = endPos;
 textChanged = true;
 }

// bold selection
 if ('bold'.indexOf(what) >= 0) {
 var selectedNew;
 if ( /^\'\'\'.*\'\'\'$/.test(selected) ) {
 selectedNew = selected.replace(/^\'\'\'(.*)\'\'\'$/, '$1');
 startPosNew = startPos;
 endPosNew = endPos - 6 ;
 }
 else {
 selectedNew = "'''" + selected + "'''";
 startPosNew = startPos;
 endPosNew = endPos + 6;
 }
 textNew = text.substring(0, startPos) + selectedNew + text.substring(endPos);
 textChanged = true;
 }

// italic selection
 if ('italic'.indexOf(what) >= 0) {
 var selectedNew;
 if ( /^\'\'.*\'\'$/.test(selected) ) {
 selectedNew = selected.replace(/^\'\'(.*)\'\'$/, '$1');
 startPosNew = startPos;
 endPosNew = endPos - 4 ;
 }
 else {
 selectedNew = "''" + selected + "''";
 startPosNew = startPos;
 endPosNew = endPos + 4;
 }
 textNew = text.substring(0, startPos) + selectedNew + text.substring(endPos);
 textChanged = true;
 }
 }

// increase heading level
 if ('headingmore'.indexOf(what) >= 0) {
 var selectedNew = '';

// nothing selected, get current line
 if (selected == '') {
 var lineStart = text.lastIndexOf('\n', startPos - 1) + 1;
 var lineEnd = text.indexOf('\n', startPos);
 if (lineEnd < 0) {
 lineEnd = text.length;
 }
 selectedNew = text.substring(lineStart, lineEnd);

// increase heading level
 if ( /^\=\=.*\=\= *$/.test(selectedNew) ) {
 selectedNew = selectedNew.replace(/^(\=\=+) *(.*?) *(\=\=+) *$/, '=$1 $2 $3=');
 }

// make the line a heading
 else {
 selectedNew = selectedNew.replace(/(^ +| +$)/g, '');
 if (selectedNew.length < 80) {
 selectedNew = '== ' + selectedNew + ' ==';
 }
 else {
 lineStart = startPos;
 lineEnd = endPos;
 selectedNew = selected;
 }
 }
 startPosNew = lineStart;
 endPosNew = lineStart;
 textNew = text.substring(0, lineStart) + selectedNew + text.substring(lineEnd);
 }

// increase all headings in selected text
 else {
 var lines = selected.split('\n');

// cycle trough the lines
 for (i = 0; i < lines.length; i++) {
 var line = lines[i];

// increase heading level in selected text
 if ( /^==.*== *$/.test(line) ) {
 line = line.replace(/^(==+) *(.*?) *(==+) *$/, '$1= $2 =$3');
 }
 selectedNew += line;
 if (i < lines.length - 1) {
 selectedNew += '\n';
 }
 }
 startPosNew = startPos;
 endPosNew = startPos + selectedNew.length;
 textNew = text.substring(0, startPos) + selectedNew + text.substring(endPos);
 }
 textChanged = true;
 }

// decrease heading level
 if ('headingless'.indexOf(what) >= 0) {
 var selectedNew = '';

// nothing selected, get current line
 if (selected == '') {
 var lineStart = text.lastIndexOf('\n', startPos - 1) + 1;
 var lineEnd = text.indexOf('\n', startPos);
 if (lineEnd < 0) {
 lineEnd = text.length;
 }
 selectedNew = text.substring(lineStart, lineEnd);

// decrease heading level
 if ( /^===.*=== *$/.test(selectedNew) ) {
 selectedNew = selectedNew.replace(/^=(==.*==)= *$/, '$1');
 }
 else if ( /^==.*==$/.test(selectedNew) ) {
 selectedNew = selectedNew.replace(/^== *(.*) *== *$/, '$1');
 }
 startPosNew = lineStart;
 endPosNew = lineStart;
 textNew = text.substring(0, lineStart) + selectedNew + text.substring(lineEnd);
 }

// increase all headings in selected text
 else {
 var lines = selected.split('\n');

// cycle trough the lines
 for (i = 0; i < lines.length; i++) {
 var line = lines[i];

// decrease heading level in selected text
 if ( /^===.*=== *$/.test(line) ) {
 line = line.replace(/^=(==.*==)= *$/, '$1');
 }
 selectedNew += line;
 if (i < lines.length - 1) {
 selectedNew += '\n';
 }
 }
 startPosNew = startPos;
 endPosNew = startPos + selectedNew.length;
 textNew = text.substring(0, startPos) + selectedNew + text.substring(endPos);
 }
 textChanged = true;
 }

// replacements and text fixes
 if ('spaces html punct caps dashes units math'.indexOf(what) >= 0) {

 var startPosFix;
 var endPosFix;
 var selectedFix;

// apply to whole text if nothing is selected
 if (startPos == endPos) {
 startPosFix = 0;
 endPosFix = text.length;
 selectedFix = text;
 }
 else {
 startPosFix = startPos;
 endPosFix = endPos;
 selectedFix = selected;
 }

// apply fixes to selected text
 if ('spaces'.indexOf(what) >= 0) { selectedFix = FixSpaces(selectedFix); }
 else if ('html'.indexOf  (what) >= 0) { selectedFix = FixHTML  (selectedFix); }
 else if ('punct'.indexOf (what) >= 0) { selectedFix = FixPunct (selectedFix); }
 else if ('caps'.indexOf  (what) >= 0) { selectedFix = FixCaps  (selectedFix); }
 else if ('dashes'.indexOf(what) >= 0) { selectedFix = FixDashes(selectedFix); }
 else if ('units'.indexOf (what) >= 0) { selectedFix = FixUnits (selectedFix); }
 else if ('math'.indexOf  (what) >= 0) { selectedFix = FixMath  (selectedFix); }

// remove newlines and spaces
 selectedFix = selectedFix.replace(/\n{3,}/g, '\n\n');
 selectedFix = selectedFix.replace(/^\n+/, '');
 selectedFix = selectedFix.replace(/\n{2,}$/, '\n');

// set selection
 if (startPos == endPos) {
 startPosNew = startPos;
 endPosNew = startPos;
 }
 else {
 startPosNew = startPos;
 endPosNew = startPos + selectedFix.length;
 }

// insert selected into unchanged text
 textNew = text.substring(0, startPosFix) + selectedFix + text.substring(endPosFix);
 textChanged = true;
 posChanged = true;
 }

// prepare find regexp for find and replace
 var regExpFlags = '';
 if ('findprev findnext replaceprev replacenext replaceall'.indexOf(what) >= 0) {

// format the find text as regexp or plain text
 if (regExp.checked) {

// replace \n with newline character, other characters have already been converted
 replaceText = replaceText.replace(/((^|[^\\])(\\\\)*)\\n/g, '$1\n');
 }
 else {
 findText = findText.replace(/([\\^\$\*\+\?\.\(\)\[\]\{\}\:\=\!\|\,\-])/g, '\\$1');
 }

// set regexp flag i
 if ( ! caseSensitive.checked ) {
 regExpFlags = 'i';
 }
 }

// find / replace
 if ('findnext replacenext findprev replaceprev'.indexOf(what) >= 0) {
 if (find.value != '') {

// create regexp
 var regExpFind = new RegExp(findText, regExpFlags + 'g');

// set start position for search to right
 var indexStart;
 var result;
 if ('findnext replacenext'.indexOf(what) >= 0) {
 indexStart = startPos;
 if ( (selected.length > 0) && ('findnext'.indexOf(what) >= 0) ) {
 indexStart = startPos + 1;
 }

// execute the regexp search to the right
 regExpFind.lastIndex = indexStart;
 result = regExpFind.exec(text);
 }

// prepare search to the left
 else {

// set start position for search to left
 indexStart = startPos - 1;
 if ( (selected.length > 0) && ('replaceprev'.indexOf(what) >= 0) ) {
 indexStart = startPos;
 }

// cycle through the matches to the left
 var resultNext;
 do {
 result = resultNext;
 resultNext = regExpFind.exec(text);
 if (resultNext == null) {
 break;
 }
 } while (resultNext.index <= indexStart);
 }

// get the matched string
 var matched;
 var matchedStart;
 var matchedLength;
 if (result != null) {
 matched = result[0];
 matchedStart = result.index;
 matchedLength = matched.length;

// replace only if the next match was already selected
 if ('replacenext replaceprev'.indexOf(what) >= 0) {
 if (selected == matched) {
 var replace = selected.replace(regExpFind, replaceText);
 textNew = text.substr(0, matchedStart) + replace + text.substr(matchedStart + matched.length);
 matchedLength = replace.length;
 textChanged = true;
 }
 }

// select the found match in the textarea
 startPosNew = matchedStart;
 endPosNew = matchedStart + matchedLength;
 }
 else {
 if ('findprev replaceprev'.indexOf(what) >= 0) {
 indexStart = startPos;
 }
 startPosNew = indexStart;
 endPosNew = indexStart;
 }
 posChanged = true;
 }
 }

// replace all
 if ('replaceall'.indexOf(what) >= 0) {
 if (find.value != '') {

// create regexp
 var regExpFind = new RegExp(findText, regExpFlags + 'g');


// replace all in whole text
 if (selected == '') {

// get the new cursorposition
 textNew = text.replace(regExpFind, replaceText);
 var textbefore = textNew.substr(0, startPos);
 textbefore = textbefore.replace(regExpFind, replaceText);
 startPosNew = textbefore.length;
 endPosNew = startPosNew;
 posChanged = true;
 }

// replace all in selection
 else {
 var replace = selected.replace(regExpFind, replaceText);
 startPosNew = startPos;
 endPosNew = startPos + replace.length;
 textNew = text.substr(0, startPos) + replace + text.substr(endPos);
 }
 textChanged = true;
 }
 }

// save search history to cookie
 if ('findnext findprev'.indexOf(what) >= 0) {
 AddToHistory('find');
 }
 if ('replacenext replaceprev replaceall'.indexOf(what) >= 0) {
 AddToHistory('find');
 AddToHistory('replace');
 }

// get the find field from the selection
 if ('findnext findprev replacenext replaceprev getfind'.indexOf(what) >= 0) {
 if ( ('getfind'.indexOf(what) >= 0) || ( (find.value == '') && (selected != '') ) ) {
 if (regExp.checked) {
 find.value = selected.replace(/\n/g, '\\n');
 }
 else {
 find.value = selected.replace(/\n.*/, '');
 startPosNew = startPos;
 endPosNew = endPos;
 }
 }
 }

// undo all
 if ('undoall'.indexOf(what) >= 0) {
 startPosNew = startPos;
 endPosNew = startPos;
 textNew = editformOrig;
 textChanged = true;
 }

// jump to top / bottom
 if ('updown'.indexOf(what) >= 0) {
 if (scrollTopPx > scrollHeightPx / 2) {
 startPosNew = 0;
 endPosNew = 0
 }
 else {
 startPosNew = text.length;
 endPosNew = text.length;
 }
 posChanged = true;
 }

// change textarea, save undo info
 if (textChanged) {
 textarea.value = textNew;
 SaveUndo(text, startPos, endPos);
 SaveUndo(textNew, startPosNew, endPosNew);
 }

// set the selection range
 textarea.setSelectionRange(startPosNew, endPosNew);

// scroll the textarea to the selected text or cursor position
 if (posChanged) {
 ScrollToSelection();
 }
 else {
 textarea.scrollTop = scrollTopPx;
 }
 return;
}


//
// scroll the textarea to the selected text or cursor position
//

function ScrollToSelection() {

 var textarea = document.editform.wpTextbox1;
 var text = textarea.value;
 var rows = textarea.rows;
 var cols = textarea.cols;

// get total number of rows
 var totalRows = GetRows(text, rows, cols);

// determine scroll position
 if (totalRows >= rows) {
 var startPos = textarea.selectionStart;

// breaking of the cursor row depends on trailing characters
 var nextspace = text.indexOf(' ', startPos);
 var nextreturn = text.indexOf('\n', startPos);
 var tostart = text.substr(0, startPos);
 var fromstart = text.substr(startPos);
 fromstart = fromstart.replace(/\s.*/g, '');

// get the rows number of the cursor position
 var currentRow = GetRows(tostart + fromstart, rows, cols);
 currentRow = currentRow - rows / 2;
 if (currentRow < 0) {
 currentRow = 0;
 }

// set scroll position
 var scrollHeightRel = (currentRow - 1) / (totalRows);
 var scrollHeightPx = textarea.scrollHeight;
 var scrollTopPxNew = parseInt(scrollHeightRel * scrollHeightPx);
 textarea.scrollTop = scrollTopPxNew;
 }
 return;
}


//
// get number of rows for a text in a textarea
//

function GetRows(text, rows, cols) {
 var totalRows = 0;
 var lines = text.split('\n');

// cycle trough the lines
 for (i = 0; i < lines.length; i++) {
 totalRows ++;
 var line = lines[i];

// simulate breaking of long lines
 while (line.length > cols) {

// break line before border
 var spaceBefore = line.lastIndexOf(' ', cols);
 if (spaceBefore >= 0) {
 line = line.substr(spaceBefore + 1);
 }
 else {

// break line after border
 var spaceAfter = line.indexOf(' ', cols);
 if (spaceAfter >= 0) {
 line = line.substr(spaceAfter + 1);
 line.replace(/^ */, '');
 }

// no spaces, no break
 else {
 line = '';
 }
 }
 if (line.length > 0) {
 totalRows ++;
 }
 }
 }
 return(totalRows);
}


//
// fix characters, spaces, empty lines, certain headings
//

function FixSpaces(text) {

// remove trailing spaces from lines
 text = text.replace(/ +\n/g, '\n');

// empty line before and after headings, spaces around word (lookahead)
 text = text.replace(/(\n={2,}) *([^\n]*?) *(={2,})(?=\n)/g, '\n$1 $2 $3\n\n');

// uppercase important headings
 text = text.replace(/\n== external links? ==\n/ig, '\n== External links ==\n');
 text = text.replace(/\n== see also ==\n/ig, '\n== See also ==\n');
 text = text.replace(/\n== references? ==\n/ig, '\n== References ==\n');

// add space after * # : ; (list) and after {| |- | (table)
 text = text.replace(/(^|\n)([\*\#\:\;]+|\{\||\|\-|\|\}|\|) */g, '$1$2 ');

// empty line before and after tables
 text = text.replace(/\n+(\{\|)/g, '\n\n$1');
 text = text.replace(/(\n\|\}) *([^\n]*)[\n|$]+/g, '$1\n\n$2\n\n');

// empty line before and after lists
 text = text.replace(/(^|\n)([^\*\#\:\;].*?)\n+([\*\#\:\;])/g, '$1$2\n\n$3');
 text = text.replace(/(^|\n)([\*\#\:\;].*?)\n+([^\*\#\:\;])/g, '$1$2\n\n$3');

// split into lines and change single lines, used to handle tables
 var lines = text.split('\n');
 text = '';
 var tableflag = false;
 for (var i = 0; i < lines.length; i++) {
 var line = lines[i];

// do not change lines starting with a blank
 if ( ! line.match(/^ /) ) {

// detect table
 if ( line.match(/^(\{\||\!|\|[^}])/) ) {
 tableflag = true;
 }
 else if ( line.match(/^\|\}/) ) {
 tableflag = false;
 }

// changes only to be done in tables
 if (tableflag) {

// add spaces around ||
 line = line.replace(/ *\|\| */g, ' || ');

// to do: add spaces around | in tables without changing image markup!
 }

// changes not to be done in tables
 if ( ! tableflag) {

// empty line before and after images
 line = line.replace(/^(\[\[image:.*?\]\])/ig, '\n$1');
 line = line.replace(/(\[\[image:.*?(\[\[.*?\]\].*?)*\]\])$/ig, '$1\n');

// empty line before and after includes
 line = line.replace(/^(\{\{.*?\}\})/g, '\n$1');
 line = line.replace(/(\{\{.*?\}\})$/g, '$1\n');

// to be done: convert single newlines into spaces
//      line = line.replace(/(\n[^\n \*\#\:\;\|\{].*?)\n([^\n \*\#\:\;\|\{])/g, '$1 $2');
 }
 }

// concatenate the lines
 text += line;
 if (i < lines.length - 1) {
 text += '\n';
 }
 }

// remove spaces in wikilinks
 text = text.replace(/\[\[ *([^\n]*?) *\]\]/g, '[[$1]]');

// remove spaces in external links
 text = text.replace(/\[ *([^\n]*?) *\]/g, '[$1]');

// space around pipes in wikilinks but not in images
 if (spacesAroundPipes) {
 text = text.replace(/(\[\[(?!image:)[^\n]+?) *\| *(.*?\]\])/ig, '$1 | $2');

// space around pipes in templates
 text = text.replace(/(\{\{)([^\n]+?)(\}\})/g,
 function (p, p1, p2, p3) {
 p2 = p2.replace(/ *(\|) */g, ' | ');
 return(p1 + p2 + p3);
 }
 );
 }

// no space around pipes before brackets
 text = text.replace(/ +\| +\]\]/g, '|]]');

// no space around pipes before curly brackets
 text = text.replace(/ +\| +\}\}/g, '|}}');

// no empty line between headings and includes
 text = text.replace(/\n(==+ [^\n]*? ==+\n)\n+(\{\{.*?\}\})/g, '$1$2');

// empty line before and after categories
 text = text.replace(/(\[\[category:[^\n]*?\]\]) */gi, '\n\n$1\n\n');

// categories not separated by empty lines (lookahead)
 text = text.replace(/(\[\[category:[^\n]*?\]\])\n*(?=\[\[category:[^\n]*?\]\])/gi, '$1\n');

 return(text);
}


//
// fix html to wikicode
//

function FixHTML(text) {

// fix basic
 text = FixSpaces(text);

// convert italic
 text = text.replace(/<i>|<\/i>/g, '\'\'');

// convert bold
 text = text.replace(/<b>|<\/b>/g, '\'\'\'');

// to do: tables

 return(text);
}


//
// fix space before punctuation marks
//

function FixPunct(text) {

// fix basic
 text = FixSpaces(text);

// remove space before .,: (; could be a definition)
 text = text.replace(/([a-zA-Z\'\"\”\]\}\)]) +([\.\,\:])/g, '$1$2');

 return(text);
}

//
// fix capitalizing of lists, linklists, images, headings
//
function FixCaps(text) {


// fix basic
 text = FixSpaces(text);

// uppercase lists
 text = text.replace(/(^|\n)([\*\#\:\;]+ [^\&\w\n]*)(\w+)/g,
 function (p, p1, p2, p3) {
 if ( ! p3.match(/^(http|ftp|alpha|beta|gamma|delta|epsilon|kappa|lambda)/) ) {
 p3 = p3.substr(0, 1).toUpperCase() + p3.substr(1);
 }
 return(p1 + p2 + p3);
 }
 );

// uppercase link lists (link)
 text = text.replace(/(^|\n)([\*\#\:\;]+ \[\[)([^\n]*?)(\]\])/g,
 function (p, p1, p2, p3, p4) {

// uppercase link
 p3 = p3.replace(/^([^\&\w\n]*)(\w+)/g,
 function (p, p1, p2) {
 if ( ! p2.match(/^(http|ftp|alpha|beta|gamma|delta|epsilon|kappa|lambda)/) ) {
 p2 = p2.substr(0, 1).toUpperCase() + p2.substr(1);
 }
 return(p1 + p2);
 }
 );

// uppercase comment
 p3 = p3.replace(/(\| [^\&\w\n]*)(\w+)/g,
 function (p, p1, p2) {
 if ( ! p2.match(/^(http|ftp|alpha|beta|gamma|delta|epsilon|kappa|lambda)/) ) {
 p2 = p2.substr(0, 1).toUpperCase() + p2.substr(1);
 }
 return(p1 + p2);
 }
 );
 return(p1 + p2 + p3 + p4);
 }
 );

// uppercase headings
 text = text.replace(/(^|\n)(==+ )([^\&\w\n]*\w)([^\n]* ==+(\n|$))/ig,
 function (p, p1, p2, p3, p4) {
 return(p1 + p2 + p3.toUpperCase() + p4);
 }
 );

// uppercase images
 text = text.replace(/(\[\[)image:(\w)([^\n]*\]\])/ig,
 function (p, p1, p2, p3) {
 return(p1 + 'Image:' + p2.toUpperCase() + p3);
 }
 );

 return(text);
}


//
// dash fixer - adds a tab that fixes several obvious en/em dash, minus sign, and such special characters.
// originally from User:Omegatron
//

function FixDashes(text) {

// fix basic
 text = FixSpaces(text);

// convert html entities into actual dash characters
 text = text.replace(/&mdash;/g, '—');
 text = text.replace(/&ndash;/g, '–');
 text = text.replace(/&minus;/g, '\u2212');

// convert -- and em dashes with or without spaces to em dash surrounded by spaces
 text = text.replace(/([a-zA-Z\'\"”\]\}\)]) *(--|—|&mdash;) *([a-zA-Z\'\"“\[\{\(])/g, '$1 — $3');

// convert - or en dashes with spaces to em dash character surrounded by spaces
 text = text.replace(/([a-zA-Z\'\"”\]\}])( |&nbsp;)+(\u2212|–|&ndash;) +([a-zA-Z\'\"“\[\{])/g, '$1$2— $4');

// convert hyphen next to lone number into a minus sign character
 text = text.replace(/([a-zA-Z\'\"”\]\>] )-(\d)/g, '$1\u2212$2');

// convert dashes to en dashes in dates
 text = text.replace(/([ \(][12]\d\d\d) ?(--?|—|&mdash;) ?([12]\d\d\d|\d\d)([ \),.;])/g, '$1–$3$4');

 return(text);
}


//
// unit formatter - new tab adds spaces between number and units, makes units consistent
// originally from User:Omegatron
//

function FixUnits(text) {

// fix basic
 text = FixSpaces(text);

// convert all &deg; into actual ° symbol
 text = text.replace(/&deg;/g, '°');

// convert the word ohm(s) or the html entity into the actual O symbol (Omega, not the actual ohm symbol &#8486;) and make sure it's spaced
 text = text.replace(/(\d) ?(Y|Z|E|P|T|G|M|k|K|h|da|d|c|m|µ|µ|µ|n|p|f|a|z|y)? ?(&Omega;|ohm|Ohm)s?([ ,.])/g, '$1 $2O$4');

// convert various micro symbols into the actual micro symbol, make sure it's spaced
 text = text.replace(/(\d) ?(&mu;|µ|&micro;)(g|s|m|A|K|mol|cd|rad|sr|Hz|N|J|W|Pa|lm|lx|C|V|O|F|Wb|T|H|S|Bq|Gy|Sv|kat|°C|M)([ ,.])/g, '$1 µ$3$4');

// convert capital K to lowercase k in units
 text = text.replace(/(\d) ?K(g|s|m|A|K|mol|cd|rad|sr|Hz|N|J|W|Pa|lm|lx|C|V|O|F|Wb|T|H|S|Bq|Gy|Sv|kat|°C|M)([ ,.])/g, '$1 k$2$3');

// capitalize units correctly
 text = text.replace(/(\d) ?(khz)([ ,.])/gi, '$1 kHz$3');
 text = text.replace(/(\d) ?(mhz)([ ,.])/gi, '$1 MHz$3');
 text = text.replace(/(\d) ?(ghz)([ ,.])/gi, '$1 GHz$3');
 text = text.replace(/(\d) ?(Y|Z|E|P|T|G|M|k|K|h|da|d|c|m|µ|µ|µ|n|p|f|a|z|y)?(hz|HZ)([ ,.])/g, '$1 $2Hz$4');
 text = text.replace(/(\d) ?(Y|Z|E|P|T|G|M|k|K|h|da|d|c|m|µ|µ|µ|n|p|f|a|z|y)?(pa|PA)([ ,.])/g, '$1 $2Pa$4');

// add a space before dB or B
 text = text.replace(/(\d) ?(dB|B)\b/g, '$1 $2');

// add a space before any units that were missed before
 text = text.replace(/(\d) ?(Y|Z|E|P|T|G|M|k|K|h|da|d|c|m|µ|n|p|f|a|z|y)?(g|m|A|K|mol|cd|rad|sr|Hz|N|J|W|Pa|lm|lx|C|V|O|F|Wb|T|H|S|Bq|Gy|Sv|kat|°C|M)([ ,.])/g, '$1 $2$3$4');

// separate one for seconds since they give a lot of false positives like "1970s". Only difference is mandatory prefix.
 text = text.replace(/(\d) ?(Y|Z|E|P|T|G|M|k|K|h|da|d|c|m|µ|n|p|f|a|z|y)(s)([ ,.])/g, '$1 $2$3$4');

// bps or b/s or bits/s --> bit/s
 text = text.replace(/([KkMmGgTtPpEeYyZz])(bps|bits?\/s|b\/s)/g, '$1bit/s');

// Bps or byte/s or bytes/s --> B/s
 text = text.replace(/([KkMmGgTtPpEeYyZz])(Bps|bytes?\/s)/g, '$1B/s');

// after that, make capitalization correct
 text = text.replace(/K(bit|B)\/s/g, 'k$1/s');
 text = text.replace(/m(bit|B)\/s/g, 'M$1/s');
 text = text.replace(/g(bit|B)\/s/g, 'G$1/s');
 text = text.replace(/t(bit|B)\/s/g, 'T$1/s');
 text = text.replace(/e(bit|B)\/s/g, 'E$1/s');
 text = text.replace(/y(bit|B)\/s/g, 'Y$1/s');
 text = text.replace(/z(bit|B)\/s/g, 'Z$1/s');

// fix a common error
 text = text.replace(/mibi(bit|byte)/g, 'mebi$1');

 return(text);
}


//
// math character fixer, originally from User:Omegatron
//
// DO NOT USE ON WHOLE DOCUMENT OR <math> </math> WIKICODE!
//

function FixMath(text) {

// fix basic
 text = FixSpaces(text);

// convert html entities into actual dash characters
 text = text.replace(/&minus;/g, '\u2212');
 text = text.replace(/&middot;/g, '·');

// convert dash next to a number into a minus sign character
 text = text.replace(/([^a-zA-Z0-9\,\_\{])-(\d)/g, '$1\u2212$2');

// changes 2x3 to 2×3
 text = text.replace(/(\d ?)x( ?\d)/g, '$1×$2');

// changes 10^3 to 10<sup>3</sup>
 text = text.replace(/(\d*\.?\d+)\^(\u2212?\d+\.?\d*)/g, '$1<sup>$2</sup>');

// change x^3 to x<sup>3</sup>
 text = text.replace(/([0-9a-zA-Z])\^(\u2212?\d+\.?\d*) /g, '$1<sup>$2</sup>');

// change +/- to ±
 text = text.replace(/( |\d)\+\/(-|\u2212)( |\d)/g, '$1±$3');

 return(text);
}


//
// add a tag to the summary box
//

function AddSummary(summary) {
 var text = document.editform.wpSummary;
 if (text.value.match(/ \*\/ $/)) {
 text += ' ';
 }
 else if (text.value != '') {
 text.value += '; ';
 }
 text.value += summary;
}


//
// save undo information
//

function SaveUndo(text, startPos, endPos) {

 var textarea = document.editform.wpTextbox1;
 if (undoBufferLast == 0) {
 undoBuffer[1] = textarea.value;
 undoBufferSelStart[1] = startPos;
 undoBufferSelEnd[1] = endPos;
 undoBufferCurr = 1;
 undoBufferLast = 1;
 }
 undoBufferLast++;
 undoBufferCurr = undoBufferLast;
 var slot = undoBufferLast % undoBufferMax;
 undoBuffer[slot] = text;
 undoBufferSelStart[slot] = startPos;
 undoBufferSelEnd[slot] = endPos;
}


//
//undo
//

function Undo() {

 var textarea = document.editform.wpTextbox1;
 if (undoBufferCurr - 1 > undoBufferLast - undoBufferMax) {
 if (undoBufferCurr - 1 >= 0) {
 undoBufferCurr--;
 var slot = undoBufferCurr % undoBufferMax;
 textarea.value = undoBuffer[slot];
 textarea.focus();
 textarea.selectionStart = undoBufferSelStart[slot];
 textarea.selectionEnd = undoBufferSelEnd[slot];
 ScrollToSelection();
 }
 }
}


//
// redo
//

function Redo() {

 var textarea = document.editform.wpTextbox1;
 if (undoBufferCurr + 1 <= undoBufferLast) {
 undoBufferCurr++;
 var slot = undoBufferCurr % undoBufferMax;
 var slot = undoBufferCurr % undoBufferMax;
 textarea.value = undoBuffer[slot];
 textarea.focus();
 textarea.selectionStart = undoBufferSelStart[slot];
 textarea.selectionEnd = undoBufferSelEnd[slot];
 ScrollToSelection();
 }
}

//
// resize textarea to ~100% by adapting cols
//

function ResizeTextarea() {

 var textarea = document.editform.wpTextbox1;
 textarea.style.width = '100%';
 var widthMax = textarea.offsetWidth;
 textarea.style.width = 'auto';

// provoke a scrollbar
 var textLength = textarea.value.length;
 var cols = textarea.cols;
 var fillstring = '\n\n';
 for (i = 0; i < cols; i++) {
 fillstring += '\n';
 }

// add the filling string
 var startPos = textarea.selectionStart;
 var endPos = textarea.selectionEnd;
 var scrollTopPx = textarea.scrollTop;
 textarea.value += fillstring;

// find optimal width
 textarea.cols = 20;
 for (var i = 64; i >= 1; i = i / 2) {
 while (textarea.offsetWidth < widthMax) {
 textarea.cols = textarea.cols + i;
 }
 textarea.cols = textarea.cols - i;
 }

// remove filling string
 textarea.value = textarea.value.substr(0, textLength);
 textarea.selectionStart = startPos;
 textarea.selectionEnd = endPos;
 textarea.scrollTop = scrollTopPx;

 return;
}


//
// convert strange spaces, remove non-\n linebreak characters
//

function convertStrangeSpaces() {
 var textarea = document.editform.wpTextbox1;
 var startPos = textarea.selectionStart;
 var endPos = textarea.selectionEnd;

 var text = textarea.value;
 text = text.replace(/[\t\v\u00a0\u2028\u2029]+/g, ' '); // \u00a0 = &nbsp;
 text = text.replace(/[\r\f]/g, '');
 textarea.value = text;

 textarea.selectionStart = startPos;
 textarea.selectionEnd = endPos;

 return;
}


//
// setup routine for javascript editor
//

function SetupEditor() {

 var html = '';

// check if the editor is already installed
 if (document.getElementById('findText') != null) { return; }

// at the moment this works only for mozilla browsers (Mozilla, Mozilla Firefox, Mozilla SeaMonkey)
 var name = navigator.appName.match(/Netscape/i)[0];
 if (name == null) { return; }
 var version = navigator.appVersion.match(/\d+(\.\d+)/)[0];
 if (version == null) { return; }
 if (version < 5.0) { return; }

// get the textarea object
 var textarea = document.editform.wpTextbox1;
 if (textarea == null) { return; }

// install the diff functions
 SetupDiff();

// setup the undo buffers and get the original text for instant change view
 undoBuffer[0] = textarea.value;
 editformOrig = textarea.value;

// set textarea size to maximal row number
 window.onresize = ResizeTextarea;
 ResizeTextarea();

// convert strange spaces, remove non-\n linebreak characters
 convertStrangeSpaces();

// add custom edit area stylesheet definition to head
 var insert = document.getElementsByTagName('head')[0];
 html = '';
 html += '<style type="text/css">';
 html += '.customEdit { ' + styleButtons + '}';
 html += '.previewBox { ' + stylePreviewBox + ' }';
 html += '</style>';
 insert.innerHTML += html;

// create inputWrapper for textarea and buttons (fullscreen elements)
 var inputWrapper = document.createElement('div');
 inputWrapper.id = 'inputWrapper';
 textarea.parentNode.insertBefore(inputWrapper, textarea);

// move textarea to textareaWrapper
 var textareaWrapper = document.createElement('div');
 textareaWrapper.id = 'textareaWrapper';
 inputWrapper.appendChild(textareaWrapper);
 textareaWrapper.appendChild(textarea);

// add all other buttons and inputs to buttonsWrapper
 var buttonsWrapper = document.createElement('div');
 buttonsWrapper.id = 'buttonsWrapper';
 inputWrapper.appendChild(buttonsWrapper);

// add custom formatting buttons
 var customEditButtons = document.createElement('div');
 customEditButtons.id ='customEditButtons';
 html = '';

// find, replace
 html += '<div style="margin-top: 0.2em; margin-left: 0;" id="customEditRow1">';
 html += '<input class="customEdit" type="button" value="Get" onclick="javascript:Edit(\'getfind\');" title="Get the find text from the selection">';
 html += '<input class="customEdit" type="button" value="&larr;Find" onclick="javascript:Edit(\'findprev\');" title="Find previous">';
 html += '<span style="position: relative; padding: 0; margin: 0 0.2em;" id="findComboInput">';
 html += '<input class="customEdit" type="text" value="" style="height: 1.4em; font-family: monospace; height: 1.2em; padding: 0; margin: 0; position: absolute; left: 0; top: 0; z-index: 2;" onfocus="javascript:this.setSelectionRange(0, this.textLength);" id="findText" title="">';
 html += '<select class="customEdit" id="findSelect" style="height: 1.5em; font-family: monospace; border: none; padding: 0; margin: 0; position: relative; vertical-align: baseline; z-index: 1;" onfocus="javascript:SetComboOptions(\'find\')" onChange="javascript:ChangeComboInput(\'find\');">';
 html += '</select>';
 html += '</span>';
 html += '<input class="customEdit" type="button" value="Find&rarr;" onclick="javascript:Edit(\'findnext\');" title="Find next">';
 html += '<span style="margin-left: 0.5em;"></span/>';
 html += '<input class="customEdit" type="button" value="&uarr;&darr;" onclick="javascript:Edit(\'updown\');" title="Jump to the top / bottom">';
 html += '<span style="margin-left: 1em;"></span/>';
 html += '<input class="customEdit" type="button" value="&larr;" onclick="javascript:Undo();" title="Undo buttons">';
 html += '<input class="customEdit" type="button" value="&rarr;" onclick="javascript:Redo();" title="Redo buttons">';
 html += '<span style="margin-left: 0.5em;"></span/>';
 html += '<input class="customEdit" type="button" value="Undo all" onclick="javascript:Edit(\'undoall\');" title="Restore original text, can be undone">';
 html += '<span style="margin-left: 1em;"></span/>';
 html += '<input class="customEdit" type="button" style="font-weight: bold;" value="b" onclick="javascript:Edit(\'bold\');" title="Bold text">';
 html += '<input class="customEdit" type="button" style="font-style: italic;" value="i" onclick="javascript:Edit(\'italic\');" title="Italic text">';
 html += '<input class="customEdit" type="button" value="A&rarr;a" onclick="javascript:Edit(\'lowercase\');" title="Lowercase text">';
 html += '<span style="margin-left: 0.5em;"></span/>';
 html += '<input class="customEdit" type="button" value="=&larr;" onclick="javascript:Edit(\'headingless\');" title="Decrease heading level">';
 html += '<input class="customEdit" type="button" value="&rarr;==" onclick="javascript:Edit(\'headingmore\');" title="Increase heading level">';
 html += '<span style="margin-left: 0.5em;"></span/>';
 html += '<input class="customEdit" type="button" id="fullScreenButtonFloat" style="display: none; position: absolute; z-index: 5;">';
 html += '<input class="customEdit" type="button" id="fullScreenButton">';
 html += '</div>';

// fixing functions
 html += '<div style="margin-top: 0.2em; margin-bottom: 0.5em; margin-left: 0;" id="customEditRow2">';
 html += '<input class="customEdit" type="button" value="All" onclick="javascript:Edit(\'replaceall\');" title="Replace all in whole text or selection">';
 html += '<input class="customEdit" type="button" value="&larr;Repl." onclick="javascript:Edit(\'replaceprev\');" title="Replace previous">';
 html += '<span style="position: relative; padding: 0; margin: 0 0.2em;" id="replaceComboInput">';
 html += '<input class="customEdit" type="text" value="" style="height: 1.4em; font-family: monospace; height: 1.2em; padding: 0; margin: 0; position: absolute; left: 0; top: 0; z-index: 2;" onfocus="this.setSelectionRange(0, this.textLength);" id="replaceText" title="">';
 html += '<select class="customEdit" id="replaceSelect" style="height: 1.5em; font-family: monospace; border: none; padding: 0; margin: 0; position: relative; vertical-align: baseline; z-index: 1;" onfocus="SetComboOptions(\'replace\')" onChange="javascript:ChangeComboInput(\'replace\');">';
 html += '</select>';
 html += '</span>';
 html += '<input class="customEdit" type="button" value="Repl.&rarr;" onclick="javascript:Edit(\'replacenext\');" title="Replace">';
 html += '<span style="margin-left: 0.2em;"></span/>';
 html += '<span title="Search should be case sensitive"><input class="customEdit" style="margin: 0;" type="checkbox" value="1" id="caseSensitive"> Case</span>';
 html += '<span style="margin-left: 0.2em;"></span/>';
 html += '<span title="Search should be a regular expression"><input class="customEdit" style="margin: 0;" type="checkbox" value="1" id="regExp"> Regexp</span>';
 html += '<span style="margin-left: 1em;">Fix:</span/>';
 html += '<input class="customEdit" type="button" value="Basic" onclick="javascript:Edit(\'spaces\');" title="Fix blanks and empty lines">';
 html += '<input class="customEdit" type="button" value="&mdash;" onclick="javascript:Edit(\'dashes\');" title="Fix dashes">';
 html += '<input class="customEdit" type="button" value="k&Omega;" onclick="javascript:Edit(\'units\');" title="Fix units">';
 html += '<input class="customEdit" type="button" value="&radic;" onclick="javascript:Edit(\'math\');" title="Fix math, DO NOT USE ON WHOLE TEXT OR <math></math> WIKICODE!!!">';
 html += '<input class="customEdit" type="button" value="html" onclick="javascript:Edit(\'html\');" title="Fix html to wikicode">';
 html += '<input class="customEdit" type="button" value=".,:" onclick="javascript:Edit(\'punct\');" title="Fix spaces before puntuation">';
 html += '<input class="customEdit" type="button" value="Aa" onclick="javascript:Edit(\'caps\');" title="Fix caps in headers and lists">';
 html += '</div>';
 customEditButtons.innerHTML = html;
 buttonsWrapper.appendChild(customEditButtons);

// add elements to buttonsWrapper
 var element = document.getElementById('editpage-copywarn');
 while (element != null) {
 if (element.id == 'editpage-specialchars') {
 break;
 }
 next_element = element.nextSibling;
 buttonsWrapper.appendChild(element);
 element = next_element;
 }

// add preview and changes buttons
 var customPreview = document.createElement('span');
 customPreview.id = 'customPreviewButtons';
 html = '';
 html += '<span style="margin-left: 0.5em; margin-right: 0.5em">';
 html += 'Instant:\n';
 html += '<input type="button" class="customEdit" title="Show a preview below" value="Preview" id="instantPreview" onclick="NormalScreen(); document.getElementById(\'PreviewBox\').innerHTML = wiki2html(editform.wpTextbox1.value);" />';
 html += '<input type="button" class="customEdit" title="Show changes since your last preview below" value="Changes" id="instantDiff" onclick="NormalScreen(); document.getElementById(\'PreviewBox\').innerHTML = StringDiff(editformOrig, editform.wpTextbox1.value);" />';
 html += '<input type="button" class="customEdit" title="Clear the preview box" value="Clear" id="instantClear" onclick="NormalScreen(); document.getElementById(\'PreviewBox\').innerHTML = \'\';" />';
 html += '</span>';
 html += 'Server:\n';
 customPreview.innerHTML = html;
 var preview = document.getElementById('wpPreview');
 preview.parentNode.insertBefore(customPreview, preview);

// add preview box
 var previewBox = document.createElement('div');
 previewBox.id = 'customPreviewBox';
 html = '';
 html += '<div style="margin-top: 0.5em; margin-bottom: 0.5em; border-width: 1px; border-style: solid; border-color: #808080 #d0d0d0 #d0d0d0 #808080;" id="PreviewBoxOutline">';
 html += '<div class="previewBox" style="padding: 5px; border-width: 1px; border-style: solid; border-color: #404040 #ffffff #ffffff #404040;" id="PreviewBox">';
 html += '</div>';
 html += '</div>';
 previewBox.innerHTML = html;
 inputWrapper.parentNode.insertBefore(previewBox, inputWrapper.nextSibling);

// move linebreak before checkboxes down
 var summary = document.getElementById('wpSummary');
 var checkboxSep = document.createTextNode('');
 summary.parentNode.replaceChild(checkboxSep, summary.nextSibling);

// move 'Summary:' into submit button div
 var summary = document.getElementById('wpSummary');
 var summaryLabel = document.getElementById('wpSummaryLabel');
 summary.parentNode.insertBefore(summaryLabel, summary.parentNode.firstChild);

// make the summary a combo box
 var summary = document.getElementById('wpSummary');
 var htmlPre = '';
 var htmlPost = '';
 html = '';
 htmlPre  += ' <span style="position: relative;" id="summaryComboInput">';
 html     += ' style="padding: 0; margin: 0; position: absolute; left: 0; top: 0; z-index: 2;" onfocus="this.setSelectionRange(0, this.textLength);"';
 htmlPost += '<select style="border: none; padding: 0; margin: 0; position: relative; vertical-align: middle; z-index: 1;" id="wpSummarySelect" onfocus="javascript:SetComboOptions(\'summary\')" onchange="javascript:ChangeComboInput(\'summary\');">';
 htmlPost += '</select>';
 htmlPost += '</span>';
 summary.parentNode.innerHTML = summary.parentNode.innerHTML.replace(/\s*(<input.*?id\=\"wpSummary\")(.*?>)/, htmlPre + '$1' + html + '$2' + htmlPost);

// add margin around submit buttons
 var saveButton = document.getElementById('wpSave');
 saveButton.parentNode.style.marginTop = '0.7em';
 saveButton.parentNode.style.marginBottom = '0.5em';

// move copywarn down
 var copywarn = document.getElementById('editpage-copywarn');
 inputWrapper.parentNode.insertBefore(copywarn, previewBox.nextSibling);

// shorten submit button texts and add onclick handler
 document.getElementById('wpPreview').value = 'Preview';
 document.getElementById('wpDiff').value = 'Changes';
 window.onsubmit = function() {
 AddToHistory('summary');
 };

// set up combo input boxes with history
 fieldHist ['find'] = [];
 cookieName['find'] = 'findHistory';
 inputElement['find'] = new Object(document.getElementById('findText'));
 selectElement['find'] = new Object(document.getElementById('findSelect'));
 selectElement['find'].style.height = (inputElement['find'].clientHeight + 1) +'px';

 fieldHist ['replace'] = [];
 cookieName['replace'] = 'replaceHistory';
 inputElement['replace'] = new Object(document.getElementById('replaceText'));
 selectElement['replace'] = new Object(document.getElementById('replaceSelect'));
 selectElement['replace'].style.height = (inputElement['replace'].clientHeight + 1) +'px';

 fieldHist ['summary'] = [];
 cookieName['summary'] = 'summaryHistory';
 inputElement['summary'] = new Object(document.getElementById('wpSummary'));
 selectElement['summary'] = new Object(document.getElementById('wpSummarySelect'));
 selectElement['summary'].style.height = (inputElement['summary'].clientHeight + 1) +'px';

 ResizeComboInput('find');
 ResizeComboInput('replace');
 ResizeComboInput('summary');

// setup fullscreen mode

// save textbox properties
 normalTextareaWidth = getStyle(textarea, 'width');
 normalTextareaHeight = getStyle(textarea, 'height');
 normalTextareaMargin = getStyle(textarea, 'margin');
 normalTextareaRows = textarea.rows;

// set fullscreen style fixes
 var inputWrapper = document.getElementById('inputWrapper');
 var content = document.getElementById('content');
 var content = document.getElementById('content');
 inputWrapper.style.lineHeight = getStyle(content, 'line-height');

// move globalWrapper elements to new subGlobalWrapper
 var globalWrapper = document.getElementById('globalWrapper');
 var subGlobalWrapper = document.createElement('div');
 subGlobalWrapper.id = 'subGlobalWrapper';
 globalWrapper.appendChild(subGlobalWrapper);
 var element = globalWrapper.firstChild;
 while (element != null) {
 if (element.id == 'subGlobalWrapper') {
 break;
 }
 next_element = element.nextSibling;
 subGlobalWrapper.appendChild(element);
 element = next_element;
 }

// set original tree position of input area
 normalTreePos = inputWrapper.nextSibling;

// set fullscreen button texts
 var fullScreenButton = document.getElementById('fullScreenButton');
 var floatButton = document.getElementById('fullScreenButtonFloat');
 fullScreenButton.value = fullButtonValue;
 fullScreenButton.title = fullButtonTitle;
 floatButton.value = normalFloatButtonValue;
 floatButton.title = normalButtonTitle;

// set button event handlers
 document.captureEvents(Event.click);
 fullScreenButton.onclick = FullScreen;
 floatButton.onclick = NormalScreen;
 floatButton.onblur = function() {
 floatButton.style.right = '0.5em';
 floatButton.style.bottom = '0.5em';
 floatButton.style.top = '';
 floatButton.style.left = '';
 };
 var saveButton = document.getElementById('wpSave');
 var previewButton = document.getElementById('wpPreview');
 var diffButton = document.getElementById('wpDiff');
 saveButton.onclick = function() { NormalScreen(); saveButton.onclick = null; saveButton.click(); };
 previewButton.onclick = function() { NormalScreen(); previewButton.onclick = null; previewButton.click(); };
 diffButton.onclick = function() { NormalScreen(); diffButton.onclick = null; diffButton.click(); };
 return;
}


//
// FullScreen: change to fullscreen input area; event handler for fullscreen buttons
//

function FullScreen(event) {
 fullScreenMode = true;

// save window scroll position
 normalPageYOffset = window.pageYOffset;
 normalPageXOffset = window.pageXOffset;

// get fulltext button coordinates
 var buttonOffsetLeft = event.pageX - window.pageXOffset;
 var buttonOffsetTop = event.pageY - window.pageYOffset;

// move the input area up in the tree
 var inputWrapper = document.getElementById('inputWrapper');
 var globalWrapper = document.getElementById('globalWrapper');
 var subGlobalWrapper = document.getElementById('subGlobalWrapper');
 globalWrapper.insertBefore(inputWrapper, subGlobalWrapper);

// set input area to fullscreen
 inputWrapper.style.position = 'fixed';
 inputWrapper.style.top = '0';
 inputWrapper.style.left = '0';
 inputWrapper.style.right = '0';
 inputWrapper.style.bottom = '0';
 var content = document.getElementById('content');
 inputWrapper.style.backgroundColor = getStyle(content, 'background-color');
 var buttonsWrapper = document.getElementById('buttonsWrapper');
 buttonsWrapper.style.paddingLeft = '0.5em'
 buttonsWrapper.style.paddingBottom = '0.5em'

// set textarea size
 var textarea = document.getElementById('wpTextbox1');
 textarea.style.margin = '0';

// set the textarea to maximal height
 var textareaWrapper = document.getElementById('textareaWrapper');
 textarea.style.height = (window.innerHeight - buttonsWrapper.offsetHeight - 4) + 'px';

// hide the rest of the page
 subGlobalWrapper.style.display = 'none';

// set floating 'back to normal' button
 var floatButton = document.getElementById('fullScreenButtonFloat');
 floatButton.style.right = '';
 floatButton.style.bottomt = '';
 floatButton.style.display = 'inline';
 floatButton.style.left = (buttonOffsetLeft - floatButton.offsetWidth / 2) + 'px';
 floatButton.style.top = (buttonOffsetTop - floatButton.offsetHeight / 2) + 'px';
 floatButton.focus();

// change fullscreen button text and handler
 var fullScreenButton = document.getElementById('fullScreenButton');
 fullScreenButton.value = normalButtonValue;
 fullScreenButton.title = normalButtonTitle;
 fullScreenButton.onclick = NormalScreen;

// resize textarea to defined cols number
 ResizeTextarea();
 return;
}


//
// NormalScreen: change back to normal page view; event handler for fulscreen buttons
//

function NormalScreen() {

// check if we are in fullscreen mode
 if (fullScreenMode != true) {
 return;
 }
 fullScreenMode = false;

// hide floating 'back to normal' button
 var floatButton = document.getElementById('fullScreenButtonFloat').style.display = 'none';

// show the rest of the page
 document.getElementById('subGlobalWrapper').style.display = 'block';

// set input area back to the original position
 var inputWrapper = document.getElementById('inputWrapper');
 normalTreePos.parentNode.insertBefore(inputWrapper, normalTreePos);
 inputWrapper.style.position = 'static';
 inputWrapper.style.height = '';
 inputWrapper.style.backgroundColor = '';

// reset textarea settings
 var textarea = document.getElementById('wpTextbox1');
 textarea.style.width = normalTextareaWidth;
 textarea.style.height = normalTextareaHeight;
 textarea.style.margin = normalTextareaMargin;
 textarea.rows = normalTextareaRows;
 document.getElementById('buttonsWrapper').style.padding = '';

// change fullscreen button text and handler
 var fullScreenButton = document.getElementById('fullScreenButton');
 fullScreenButton.value = fullButtonValue;
 fullScreenButton.title = fullButtonTitle;
 fullScreenButton.onclick = FullScreen;

// reset window scroll position
 window.scrollTo(normalPageXOffset, normalPageYOffset);

// resize textarea to defined cols number
 ResizeTextarea();
 return;
}


//
// ResizeComboInput: set the size of the background select boxes so that the button is visible
//

function ResizeComboInput(field) {

// add a dummy option
 var dummy;
 if (selectElement[field].options.length == 0) {
 selectElement[field].options[0] = new Option('');
 dummy = true;
 }

// set option widths to 0
 for (i = 0; i < selectElement[field].options.length; i ++) {
 selectElement[field].options[i].style.width = '0';
 }

// calculate select width
 var inputWidth = inputElement[field].clientWidth;
 var selectWidth = selectElement[field].clientWidth;
 var optionWidth = selectElement[field].options[0].offsetWidth;
 var border = inputElement[field].offsetWidth - inputElement[field].clientWidth;
 selectElement[field].style.width = (selectWidth - optionWidth + inputWidth - border) + 'px';

// delete dummy option
 if (dummy) {
 selectElement[field].options[0] = null;
 }

// set option widths to auto
 for (i = 0; i < selectElement[field].options.length; i ++) {
 selectElement[field].options[i].style.width = 'auto';
 }
 return;
}


//
// ChangeComboInput: set the input value to selected option; onchange event handler for select boxes
//

function ChangeComboInput(field) {

// get selection index (-1 for unselected)
 var selected = selectElement[field].selectedIndex;
 if (selected >= 0) {

// get selected option
 var option = selectElement[field].options[selected];
 if (option.text != '') {

// add case and regexp checkboxes to find / replace fields
 if (option.value == 'setcheck') {
 document.getElementById('caseSensitive').checked
 = ( option.text.charAt(0) == checkMarker[true] );
 document.getElementById('regExp').checked
 = ( option.text.charAt(1) == checkMarker[true] );
 inputElement[field].value = option.text.substr(3);
 }
 else {
 inputElement[field].value = option.text;
 }
 }
 }
 return;
}


//
// AddToHistory: add an input value to the cookie history
//

function AddToHistory(field) {
 if (inputElement[field].value != '') {

// load history from cookie
 LoadHistoryFromCookie(field);

// add current value to history
 fieldHist[field].unshift(inputElement[field].value);

// add case and regexp checkboxes to find / replace value
 if ( (field == 'find') || (field == 'replace') ) {
 fieldHist[field][0] =
 checkMarker[ document.getElementById('caseSensitive').checked ] +
 checkMarker[ document.getElementById('regExp').checked ] +
 ' ' + fieldHist[field][0];
 }

// remove multiple old copies from history
 i = 1;
 while (i < fieldHist[field].length) {
 if (fieldHist[field][i] == fieldHist[field][0]) {
 fieldHist[field].splice(i, 1);
 }
 else {
 i ++;
 }
 }

// remove new value if it is a preset value
 i = 0;
 if (presetOptions[field] != null) {
 while (i < presetOptions[field].length) {
 if (presetOptions[field][i] == fieldHist[field][0]) {
 fieldHist[field].shift;
 break;
 }
 else {
 i ++;
 }
 }
 }

// cut history to maximal history length
 fieldHist[field] = fieldHist[field].slice(0, findHistoryLength);

// saved history to cookie
 SaveHistoryToCookie(field);
 }
 return;
}


//
// SetComboOptions: generate the select options from cookie history; onfocus handler for select box
//

function SetComboOptions(field) {

// load history from cookie
 LoadHistoryFromCookie(field);

 var option = {};
 var selected = null;
 j = 0;

// delete options
 var options = selectElement[field].options;
 for (i = 0; i > options.length; i ++) {
 selectElement[field].remove(i);
 }

// delete optgroup
 option = document.getElementById(field + 'Optgroup');
 if (option != null) {
 selectElement[field].removeChild(option);
 }

// workaround for onchange not firing when selecting first option from unselected dropdown
 option = document.createElement('option');
 option.style.display = 'none';
 selectElement[field].options[j++] = option;

// add history entries
 for (i = 0; i < fieldHist[field].length; i ++) {
 if (fieldHist[field][i] != null) {
 if (fieldHist[field][i] == inputElement[field].value) {
 selected = j;
 }
 option = document.createElement('option');
 option.text = fieldHist[field][i];
 if ( (field == 'find') || (field == 'replace') ) {
 option.value = 'setcheck';
 }
 selectElement[field].options[j++] = option;
 }
 }

// add preset entries
 if (presetOptions[field] != null) {
 var startPreset = j;
 for (i = 0; i < presetOptions[field].length; i ++) {
 if (presetOptions[field][i] != null) {
 if (presetOptions[field][i] == inputElement[field].value) {
 selected = j;
 }
 option = document.createElement('option');
 option.text = presetOptions[field][i];
 selectElement[field].options[j++] = option;
 }
 }

// add a blank separator
 if (startPreset > 1) {
 option = document.createElement('optgroup');
 option.label = '\u00a0';
 option.id = field + 'Optgroup';
 selectElement[field].insertBefore(option, selectElement[field].options[startPreset]);
 }
 }

// set the selection
 selectElement[field].selectedIndex = selected;
 return;
}


//
// LoadHistoryFromCookie: get the input box history from the respective cookie
//

function LoadHistoryFromCookie(field) {
 var cookie = GetCookie(cookieName[field]);
 if (cookie != null) {
 cookie = decodeURIComponent(cookie);
 fieldHist[field] = cookie.split('\n');
 }
 return;
}


//
// SaveHistoryToCookie: save the input box history to the respective cookie
//

function SaveHistoryToCookie(field) {
 var cookieExpire = new Date();
 cookieExpire.setTime( cookieExpire.getTime() + cookieExpireSec * 1000 );
 var cookie = '';
 cookie = fieldHist[field].join('\n')
 cookie = encodeURIComponent(cookie);
 SetCookie(cookieName[field], cookie, cookieExpire.toGMTString());
 return;
}


// getStyle: get style properties for non-inline css definitions
function getStyle(element, styleProperty) {
 var style;
 if (element != null) {
 style = document.defaultView.getComputedStyle(element, null).getPropertyValue(styleProperty);
 }
 return(style);
}


//
// GetCookie
//

function GetCookie(name) {
 var cookie = ' ' + document.cookie;
 var search = ' ' + name + '=';
 var setStr = null;
 var offset = 0;
 var end = 0;
 if (cookie.length > 0) {
 offset = cookie.indexOf(search);
 if (offset != -1) {
 offset += search.length;
 end = cookie.indexOf(';', offset)
 if (end == -1) {
 end = cookie.length;
 }
 setStr = cookie.substring(offset, end);
 setStr = setStr.replace(/\\+/g, ' ');
 setStr = decodeURIComponent(setStr);
 }
 }
 return(setStr);
}


//
// SetCookie
//

function SetCookie(name, value, expires, path, domain, secure) {
 document.cookie = name + '=' + encodeURIComponent(value) +
 ((expires) ? '; expires=' + expires : '') +
 ((path)    ? '; path=' + path : '') +
 ((domain)  ? '; domain=' + domain : '') +
 ((secure)  ? '; secure' : '');
}


/* </nowiki></pre> */