MediaWiki:Toggler.js

/*   Toggles the display of elements on a page Author/contact: Austin Che http://openwetware.org/wiki/User:Austin_J._Che See http://openwetware.org/wiki/OpenWetWare:Toggle for examples and documentation

Indexed array of toggler ids to array of associated toggle operations each operation is a two element array, the first being the type, the second a class name or array of elements operation types are strings like "_reset" or "" for the default toggle operation

var togglers = []; var allClasses = {}; // associative map of class names to page elements

function toggler(id) { var toBeToggled = togglers[id]; if (!toBeToggled) return;

// if some element is in list more than once, it will be toggled multiple times for (var i = 0; i < toBeToggled.length; i++) { // get array of elements to operate on       var toggles = toBeToggled[i][1]; if (typeof(toggles) == "string") { if (toggles.charAt(0) == '-') { // treat as an element ID, not as class toggles = document.getElementById(toggles.substring(1)); if (toggles) toggles = new Array(toggles); } else { toggles = allClasses[toggles]; } }       if (!toggles || !toggles.length) continue;

var op = toBeToggled[i][0]; // what the operation will be

switch (op) { case "_reset": for (var j in toggles) toggles[j].style.display = toggles[j]._toggle_original_display; break; case "_show": for (var j in toggles) toggles[j].style.display = ''; break; case "_hide": for (var j in toggles) toggles[j].style.display = 'none'; break; default: // Toggle for (var j in toggles) toggles[j].style.display = ((toggles[j].style.display == 'none') ? '' : 'none'); break; }   } }

function createTogglerLink(toggler, id) { var toggle = document.createElement("a"); toggle.className = 'toggler-link'; toggle.setAttribute('id', 'toggler' + id); toggle.setAttribute('href', 'javascript:toggler("' + id + '");'); var child = toggler.firstChild; toggler.removeChild(child); toggle.appendChild(child); toggler.insertBefore(toggle, toggler.firstChild); }

function toggleInit { var togglerElems = []; var toggleGroup = [];

// initialize/clear any old information togglers = []; allClasses = {}; allClasses.watch = undefined; allClasses.unwatch = undefined;

// make list of all document classes var elems = document.getElementsByTagName("*"); var numelems = elems.length; for (var i = 0; i < elems.length; i++) { var elem = elems[i]; if (!elem.className || !elem.className.split) { continue; }

elem._toggle_original_display = elem.style.display; var togglerID = -1; var elemClasses = elem.className.split(' '); // get list of classes for (var j = 0; j < elemClasses.length; j++) {           var elemClass = elemClasses[j]; if (! allClasses[elemClass]) { allClasses[elemClass] = []; } allClasses[elemClass].push(elem);

// all the special classes begin with _toggle if (elemClass.substring(0, 7) != "_toggle") { continue; }

if (elemClass == "_togglegroup") { toggleGroup = []; } else if (elemClass == "_toggle") { toggleGroup.push(elem); } else if (elemClass.substring(0, 12) == "_toggle_init") { // set initial value for display (ignore the original CSS set value) // understands _toggle_initshow and _toggle_inithide var disp = elemClass.substring(12); if (disp == "show") { elem.style.display = ''; } else if (disp == "hide") { elem.style.display = 'none'; } elem._toggle_original_display = disp; }           else if (elemClass.substring(0, 8) == "_toggler") { if (togglerID == -1) { togglerID = togglers.length; togglers[togglerID] = []; togglerElems[togglerID] = elem; }

// all classes are of form _toggler_op-CLASS // figure out what class we're toggling // if none is specified, then we use the current toggle group var toBeToggled; var hyphen = elemClass.indexOf('-'); if (hyphen != -1) { toBeToggled = elemClass.substring(hyphen+1); } else { toBeToggled = toggleGroup; hyphen = elemClass.length; }               var op = elemClass.substring(8, hyphen); togglers[togglerID].push(new Array(op, toBeToggled)); }       }    }    // add javascript links to all toggler elements for (var i = 0; i < togglerElems.length; i++) createTogglerLink(togglerElems[i], i); }

addOnloadHook(toggleInit);