TYPO3 Core

if (mode === 'wysiwyg' && this.editor.isEditable()) {

switch (button.itemId) {

case 'CreateLink':

button.setDisabled(selectionEmpty && !button.isInContext(mode, selectionEmpty, ancestors));

if (!button.disabled) {

var node = this.editor.getParentElement();

var el = HTMLArea.getElementObject(node, 'a');

if (el != null && /^a$/i.test(el.nodeName)) {

node = el;

}

if (node != null && /^a$/i.test(node.nodeName)) {

button.setTooltip({ title: this.localize('Modify link') });

} else {

button.setTooltip({ title: this.localize('Insert link') });

}

}

break;

case 'UnLink':

var link = false;

// Let's see if a link was double-clicked in Firefox

if (Ext.isGecko && !selectionEmpty) {

var range = this.editor._createRange(this.editor._getSelection());

if (range.startContainer.nodeType == 1 && range.startContainer == range.endContainer && (range.endOffset - range.startOffset == 1)) {

var node = range.startContainer.childNodes[range.startOffset];

if (node && /^a$/i.test(node.nodeName) && node.textContent == range.toString()) {

link = true;

}

}

}

button.setDisabled(!link && !button.isInContext(mode, selectionEmpty, ancestors));

break;