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function addWikiFormattingToolbar(textarea) {
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if ((typeof(document["selection"]) == "undefined")
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&& (typeof(textarea["setSelectionRange"]) == "undefined")) {
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return;
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}
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var toolbar = document.createElement("div");
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toolbar.className = "wikitoolbar";
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function addButton(id, title, fn) {
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var a = document.createElement("a");
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a.href = "#";
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a.id = id;
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a.title = title;
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a.onclick = function() { try { fn() } catch (e) { } return false };
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a.tabIndex = 400;
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toolbar.appendChild(a);
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}
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function encloseSelection(prefix, suffix) {
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textarea.focus();
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var start, end, sel, scrollPos, subst;
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if (typeof(document["selection"]) != "undefined") {
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sel = document.selection.createRange().text;
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} else if (typeof(textarea["setSelectionRange"]) != "undefined") {
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start = textarea.selectionStart;
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end = textarea.selectionEnd;
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scrollPos = textarea.scrollTop;
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sel = textarea.value.substring(start, end);
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}
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if (sel.match(/ $/)) { // exclude ending space char, if any
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sel = sel.substring(0, sel.length - 1);
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suffix = suffix + " ";
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}
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subst = prefix + sel + suffix;
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if (typeof(document["selection"]) != "undefined") {
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var range = document.selection.createRange().text = subst;
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textarea.caretPos -= suffix.length;
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} else if (typeof(textarea["setSelectionRange"]) != "undefined") {
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textarea.value = textarea.value.substring(0, start) + subst +
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textarea.value.substring(end);
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if (sel) {
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textarea.setSelectionRange(start + subst.length, start + subst.length);
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} else {
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textarea.setSelectionRange(start + prefix.length, start + prefix.length);
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}
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textarea.scrollTop = scrollPos;
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}
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}
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addButton("strong", "Bold text: '''Example'''", function() {
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encloseSelection("'''", "'''");
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});
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addButton("em", "Italic text: ''Example''", function() {
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encloseSelection("''", "''");
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});
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addButton("heading", "Heading: == Example ==", function() {
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encloseSelection("\n== ", " ==\n", "Heading");
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});
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addButton("link", "Link: [http://www.example.com/ Example]", function() {
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encloseSelection("[", "]");
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});
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addButton("code", "Code block: {{{ example }}}", function() {
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encloseSelection("\n{{{\n", "\n}}}\n");
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});
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addButton("hr", "Horizontal rule: ----", function() {
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encloseSelection("\n----\n", "");
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});
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addButton("np", "New paragraph", function() {
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encloseSelection("\n\n", "");
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});
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addButton("br", "Line break: [[BR]]", function() {
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encloseSelection("[[BR]]\n", "");
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});
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textarea.parentNode.insertBefore(toolbar, textarea);
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}
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// Add the toolbar to all <textarea> elements on the page with the class
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// 'wikitext'.
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var re = /\bwikitext\b/;
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var textareas = document.getElementsByTagName("textarea");
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for (var i = 0; i < textareas.length; i++) {
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var textarea = textareas[i];
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if (textarea.className && re.test(textarea.className)) {
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addWikiFormattingToolbar(textarea);
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}
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}
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