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// Used for dynamically updating the height of a textarea
function resizeTextArea(id, rows) {
var textarea = document.getElementById(id);
if (!textarea || (typeof(textarea.rows) == "undefined")) return;
textarea.rows = rows;
}
// A better way than for example hardcoding foo.onload
function addEvent(element, type, func){
if (element.addEventListener) {
element.addEventListener(type, func, false);
return true;
} else if (element.attachEvent) {
return element.attachEvent("on" + type, func);
}
return false;
}
// Adapted from http://www.kryogenix.org/code/browser/searchhi/
function searchHighlight() {
if (!document.createElement) return;
var div = document.getElementById("searchable");
if (!div) return;
function getSearchWords(url) {
if (url.indexOf('?') == -1) return [];
var queryString = url.substr(url.indexOf('?') + 1);
var params = queryString.split('&');
for (var p in params) {
var param = params[p].split('=');
if (param.length < 2) continue;
if (param[0] == 'q' || param[0] == 'p') { // q= for Google, p= for Yahoo
return unescape(param[1].replace(/\+/g, ' ')).split(/\s+/);
}
}
return [];
}
function highlightWord(node, word, searchwordindex) {
// If this node is a text node and contains the search word, highlight it by
// surrounding it with a span element
if (node.nodeType == 3) { // Node.TEXT_NODE
var pos = node.nodeValue.toLowerCase().indexOf(word.toLowerCase());
if (pos >= 0 && !/^searchword\d$/.test(node.parentNode.className)) {
var span = document.createElement("span");
span.className = "searchword" + (searchwordindex % 5);
span.appendChild(document.createTextNode(
node.nodeValue.substr(pos, word.length)));
var newNode = node.splitText(pos);
newNode.nodeValue = newNode.nodeValue.substr(word.length);
node.parentNode.insertBefore(span, newNode);
return true;
}
} else if (!node.nodeName.match(/button|select|textarea/i)) {
// Recurse into child nodes
for (var i = 0; i < node.childNodes.length; i++) {
if (highlightWord(node.childNodes[i], word, searchwordindex)) i++;
}
}
return false;
}
var words = getSearchWords(document.URL);
if (!words.length) words = getSearchWords(document.referrer);
if (words.length) {
for (var w in words) {
if (words[w].length) highlightWord(div, words[w], w);
}
}
}
function enableControl(id, enabled) {
if (typeof(enabled) == "undefined") enabled = true;
var control = document.getElementById(id);
if (!control) return;
control.disabled = !enabled;
var labels = document.getElementsByTagName("label");
for (var i = 0; i < labels.length; i++) {
if (labels[i].htmlFor == id) {
labels[i].className = enabled ? "enabled" : "disabled";
}
}
}
function addWikiFormattingToolbar(textarea) {
if ((typeof(document["selection"]) == "undefined")
&& (typeof(textarea["setSelectionRange"]) == "undefined")) {
return;
}
var toolbar = document.createElement("div");
toolbar.className = "wikitoolbar";
function addButton(id, title, fn) {
var a = document.createElement("a");
a.href = "#";
a.id = id;
a.title = title;
a.onclick = function() { try { fn() } catch (e) { } return false };
a.tabIndex = 400;
toolbar.appendChild(a);
}
function encloseSelection(prefix, suffix) {
textarea.focus();
var start, end, sel, scrollPos, subst;
if (typeof(document["selection"]) != "undefined") {
sel = document.selection.createRange().text;
} else if (typeof(textarea["setSelectionRange"]) != "undefined") {
start = textarea.selectionStart;
end = textarea.selectionEnd;
scrollPos = textarea.scrollTop;
sel = textarea.value.substring(start, end);
}
if (sel.match(/ $/)) { // exclude ending space char, if any
sel = sel.substring(0, sel.length - 1);
suffix = suffix + " ";
}
subst = prefix + sel + suffix;
if (typeof(document["selection"]) != "undefined") {
var range = document.selection.createRange().text = subst;
textarea.caretPos -= suffix.length;
} else if (typeof(textarea["setSelectionRange"]) != "undefined") {
textarea.value = textarea.value.substring(0, start) + subst +
textarea.value.substring(end);
if (sel) {
textarea.setSelectionRange(start + subst.length, start + subst.length);
} else {
textarea.setSelectionRange(start + prefix.length, start + prefix.length);
}
textarea.scrollTop = scrollPos;
}
}
addButton("strong", "Bold text: '''Example'''", function() {
encloseSelection("'''", "'''");
});
addButton("em", "Italic text: ''Example''", function() {
encloseSelection("''", "''");
});
addButton("heading", "Heading: == Example ==", function() {
encloseSelection("\n== ", " ==\n", "Heading");
});
addButton("link", "Link: [http://www.example.com/ Example]", function() {
encloseSelection("[", "]");
});
addButton("code", "Code block: {{{ example }}}", function() {
encloseSelection("\n{{{\n", "\n}}}\n");
});
addButton("hr", "Horizontal rule: ----", function() {
encloseSelection("\n----\n", "");
});
textarea.parentNode.insertBefore(toolbar, textarea);
var br = document.createElement("br");
br.style.clear = "left";
textarea.parentNode.insertBefore(br, textarea);
}
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