function correctContentEditableSelectionBeforeDelete(el) {
var selection = exports.getSelectionByElement(el),
startNode = selection.anchorNode,
endNode = selection.focusNode,
startOffset = selection.anchorOffset,
endOffset = selection.focusOffset,
startNodeFirstNonWhitespaceSymbol = ContentEditableHelper.getFirstNonWhitespaceSymbolIndex(startNode.nodeValue),
startNodeLastNonWhitespaceSymbol = ContentEditableHelper.getLastNonWhitespaceSymbolIndex(startNode.nodeValue),
endNodeFirstNonWhitespaceSymbol = ContentEditableHelper.getFirstNonWhitespaceSymbolIndex(endNode.nodeValue),
endNodeLastNonWhitespaceSymbol = ContentEditableHelper.getLastNonWhitespaceSymbolIndex(endNode.nodeValue),
newStartOffset = null,
newEndOffset = null;
if (startNode.nodeType === 3) {
if (startOffset < startNodeFirstNonWhitespaceSymbol && startOffset !== 0)
newStartOffset = 0;
else if (startOffset !== startNode.nodeValue.length && ((ContentEditableHelper.isInvisibleTextNode(startNode) && startOffset !== 0) ||
(startOffset > startNodeLastNonWhitespaceSymbol)))
newStartOffset = startNode.nodeValue.length;
}
if (endNode.nodeType === 3) {
if (endOffset < endNodeFirstNonWhitespaceSymbol && endOffset !== 0)
newEndOffset = 0;
else if (endOffset !== endNode.nodeValue.length && ((ContentEditableHelper.isInvisibleTextNode(endNode) && endOffset !== 0) ||
(endOffset > endNodeLastNonWhitespaceSymbol)))
newEndOffset = endNode.nodeValue.length;
}
if ($.browser.webkit) {
if (newStartOffset !== null) {
if (newStartOffset === 0)
startNode.nodeValue = startNode.nodeValue.substring(startNodeFirstNonWhitespaceSymbol);
else
startNode.nodeValue = startNode.nodeValue.substring(0, startNodeLastNonWhitespaceSymbol);
}
if (newEndOffset !== null) {
if (newEndOffset === 0)
endNode.nodeValue = endNode.nodeValue.substring(endNodeFirstNonWhitespaceSymbol);
else
endNode.nodeValue = endNode.nodeValue.substring(0, endNodeLastNonWhitespaceSymbol);
}
}
if (newStartOffset !== null || newEndOffset !== null) {
newStartOffset = newStartOffset !== null ? (newStartOffset === 0 ? newStartOffset : startNode.nodeValue.length) : startOffset;
newEndOffset = newEndOffset !== null ? (newEndOffset === 0 ? newEndOffset : endNode.nodeValue.length) : endOffset;
exports.selectByNodesAndOffsets(startNode, newStartOffset, endNode, newEndOffset);
}
}
function selectContentEditable(el, from, to, needFocus, inverse) {
var endPosition = null,
firstTextNodeChild = null,
latestTextNodeChild = null,
startPosition = null,
temp = null;
if (typeof from !== 'undefined' && typeof to !== 'undefined' && from > to) {
temp = from;
from = to;
to = temp;
inverse = true;
}
if (typeof from === 'undefined') {
firstTextNodeChild = ContentEditableHelper.getFirstVisibleTextNode(el);
startPosition = {
node: firstTextNodeChild || el,
offset: firstTextNodeChild && firstTextNodeChild.nodeValue ?
ContentEditableHelper.getFirstNonWhitespaceSymbolIndex(firstTextNodeChild.nodeValue) : 0
};
}
if (typeof to === 'undefined') {
latestTextNodeChild = ContentEditableHelper.getLastVisibleTextNode(el, true);
endPosition = {
node: latestTextNodeChild || el,
offset: latestTextNodeChild && latestTextNodeChild.nodeValue ?
ContentEditableHelper.getLastNonWhitespaceSymbolIndex(latestTextNodeChild.nodeValue) : 0
};
}
startPosition = startPosition || ContentEditableHelper.calculateNodeAndOffsetByPosition(el, from);
endPosition = endPosition || ContentEditableHelper.calculateNodeAndOffsetByPosition(el, to);
if (!startPosition.node || !endPosition.node)
return;
exports.selectByNodesAndOffsets(startPosition.node, startPosition.offset, endPosition.node, endPosition.offset, needFocus, inverse);
}