execute(range?: Range, value?: any): void {
var hasRange: boolean = !!(range && range instanceof Range);
var backward: boolean;
var selection: Selection;
if (!hasRange) {
selection = currentSelection(this.document);
backward = isBackward(selection);
range = currentRange(selection);
}
if (this.queryState(range)) {
unwrapRange(range, this.nodeName, this.document);
} else {
wrapRange(range, this.nodeName, this.document);
}
if (!hasRange) {
// when no Range was passed in then we must reset the document's Selection
setRange(selection, range, backward);
}
}
execute(range?: Range, value?: any): void {
var isSel: boolean = false;
var backward: boolean;
var selection: Selection;
var sel: Selection = currentSelection(this.document);
if (null != range && !(range instanceof Range)) {
value = range;
range = null;
}
if (!range) {
backward = isBackward(sel);
range = currentRange(this.document);
isSel = true;
}
if (!range) return;
var command: Command;
if (this.queryState(range)) {
command = this.unlink;
value = null;
if (range.collapsed) {
// no selection, so manually traverse up the DOM and find the A node
var a: Node = closest(range.commonAncestorContainer, 'a', true);
if (a) {
debug('selecting A node contents %o', a);
range.selectNodeContents(a);
}
}
} else {
command = this.createLink;
if (!value) value = this.href;
if (range.collapsed) {
debug('finding surrounding word at caret for collapsed Range');
// upon a collapsed Range, we want to find the surrounding "word" that
// the cursor is touching, and then augment the Range to surround the word
var wordRange: Range = wordAtCaret(range.endContainer, range.endOffset);
if (wordRange) {
debug('found surrounding word: %o', wordRange.toString());
copyRange(range, wordRange);
} else {
debug('no surrounding word, inserting text "Link"');
var text = this.document.createTextNode('Link');
insertNode(range, text);
range.setStart(text, 0);
range.setEnd(text, 4);
}
}
}
if (isSel) {
// if no Range was explicitly passed in, then augment the current Selection
// in the case that we modified the range (collapsd), so that native
// browser selection works out properly after the command is executed.
setRange(sel, range, backward);
range = null;
}
command.execute(range, value);
}