// Set HTML FontSize via DOM, 2009-06-20
var defFontSize = 85; // In %, applied to
var minFontSize = 56; // Will differ according to Font / Layout
var maxFontSize = 112;
var prefsLoaded = false;
var currentFontSize = defFontSize;
var controls = new Array ( // array of objects (object literals)
{ ttip: "Schrift vergrößern",
actn: 'changeFontSize(2)',
clss: 'larger',
text: "Größer",
link: null, // DOM node with link
span: null, // DOM node without link
actv: true
},{
ttip: "Schrift Verkleinern",
actn: 'changeFontSize(-2)',
clss: 'smaller',
text: "Kleiner",
link: null,
span: null,
actv: true
},{
ttip: "Schriftgröße auf Standard zurücksetzen",
actn: 'resetFontSize()',
clss: 'reset',
text: "Standard",
link: null,
span: null,
actv: true
}
);
function changeFontSize(sizeDifference){
currentFontSize = currentFontSize + sizeDifference;
if (currentFontSize > maxFontSize) {
currentFontSize = maxFontSize;
}
else
if (currentFontSize < minFontSize) {
currentFontSize = minFontSize;
}
setFontSize(currentFontSize);
// AdMuncher defaults to preventing onunload actions, so do this here
createCookie("fontSize", currentFontSize, 365);
};
function resetFontSize() {
currentFontSize = defFontSize;
changeFontSize(0);
}
function setFontSize(fontSize) {
document.body.style.fontSize = fontSize + '%';
// alert(document.body.style.fontSize);
if (prefsLoaded) {
// alert(fontSize + ' / ' + defFontSize + ' / ' + (controls[2].actv ? 'true' : 'false'));
// Maybe need to activate / deactivate a link
if (fontSize >= maxFontSize && controls[0].actv) swapInDom(0); else
if (fontSize < maxFontSize && !controls[0].actv) swapInDom(0); else
if (fontSize <= minFontSize && controls[1].actv) swapInDom(1); else
if (fontSize > minFontSize && !controls[1].actv) swapInDom(1); else
if (fontSize == defFontSize && controls[2].actv) swapInDom(2); else
if (fontSize != defFontSize && !controls[2].actv) swapInDom(2);
}
}
function createCookie(name,value,days) {
if (days) {
var date = new Date();
date.setTime(date.getTime()+(days*24*60*60*1000));
var expires = "; expires="+date.toGMTString();
}
else expires = "";
document.cookie = name+"="+value+expires+"; path=/";
};
function readCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for (var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null;
};
function saveSettings()
{
// alert('saveSettings');
createCookie("fontSize", currentFontSize, 365);
}
function displayControls() {
var fsSpan = (document.getElementById) ? document.getElementById('fontsize') : document.all('fontsize');
// Old MSIEs don't like it when the text node is appended
// before its parent is inserted into the DOM.
var textObj = document.createTextNode("Schrift: ");
fsSpan.appendChild(textObj);
var l = controls.length, linkObj, spanObj, displayLink, objTextClone;
var ua = navigator.userAgent.toLowerCase();
var isOpera = ua.indexOf("opera") > -1;
var isIE = !isOpera && ua.indexOf("msie") > -1;
// 1. Always create all the link and span elements
for (var i = 0; i < l; i++) {
// alert(maxFontSize + ' / ' + currentFontSize + ' / ' + minFontSize);
if (isIE) {
// MSIE - Grrr.. (attributes not applied using W3C-Method)
linkObj = document.createElement('');
spanObj = document.createElement('');
}
else {
linkObj = document.createElement('a');
linkObj.setAttribute('href', 'index.php');
linkObj.setAttribute('title', controls[i].ttip);
linkObj.setAttribute('onclick', controls[i].actn + '; return false;');
linkObj.setAttribute('class', controls[i].clss);
spanObj = document.createElement('span');
spanObj.setAttribute('class', 'current');
}
textObj = document.createTextNode(controls[i].text);
linkObj.appendChild(textObj);
textObj = document.createTextNode(controls[i].text);
spanObj.appendChild(textObj);
// 2. Note them in the global object
controls[i].link = linkObj;
controls[i].span = spanObj;
// 3. Add the appropriate one to the DOM
if (controls[i].clss == 'larger') {
controls[i].actv = (currentFontSize < maxFontSize);
}
else
if (controls[i].clss == 'smaller') {
controls[i].actv = (currentFontSize > minFontSize);
}
else { // Reset to Standard
controls[i].actv = (currentFontSize != defFontSize);
}
if (controls[i].actv) {
fsSpan.appendChild(linkObj);
}
else {
fsSpan.appendChild(spanObj);
}
// 4. Add some space
spanObj = document.createElement('span');
fsSpan.appendChild(spanObj);
// escaped unicode non-breaking space - createTextNode escapes ampersand
var strText = (i == (l-1)) ? '\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0' : '\u00A0';
textObj = document.createTextNode(strText);
fsSpan.lastChild.appendChild(textObj);
} // for
}
function swapInDom(intIndex) {
if (controls[intIndex].actv) {
controls[intIndex].link.parentNode.replaceChild(
controls[intIndex].span, controls[intIndex].link);
controls[intIndex].actv = false;
}
else {
controls[intIndex].span.parentNode.replaceChild(
controls[intIndex].link, controls[intIndex].span);
controls[intIndex].actv = true;
}
return;
}
function setUserOptions() {
// First get any saved value from a cookie and apply it
if (!prefsLoaded) {
var cookie = readCookie("fontSize");
currentFontSize = cookie ? parseInt(cookie) : defFontSize;
setFontSize(currentFontSize);
prefsLoaded = true;
}
// Then display user controls (one may be initially inactive)
displayControls();
}