/// <summary>
/// Replaces text.
/// </summary>
/// <param name="offset">The starting offset of the text to be replaced.</param>
/// <param name="length">The length of the text to be replaced.</param>
/// <param name="text">The new text.</param>
public void Replace(int offset, int length, string text)
{
if (text == null)
{
throw new ArgumentNullException("text");
}
var textSource = new StringTextSource(text);
// Ensure that all changes take place inside an update group.
// Will also take care of throwing an exception if inDocumentChanging is set.
BeginUpdate();
try {
// protect document change against corruption by other changes inside the event handlers
inDocumentChanging = true;
try {
// The range verification must wait until after the BeginUpdate() call because the document
// might be modified inside the UpdateStarted event.
ThrowIfRangeInvalid(offset, length);
DoReplace(offset, length, textSource);
}
finally {
inDocumentChanging = false;
}
}
finally {
EndUpdate();
}
}
void DoReplace(int offset, int length, ITextSource newText)
{
if (length == 0 && newText.TextLength == 0)
{
return;
}
ITextSource removedText;
if (length == 0)
{
removedText = StringTextSource.Empty;
}
else if (length < 100)
{
removedText = new StringTextSource(rope.ToString(offset, length));
}
else
{
// use a rope if the removed string is long
removedText = new RopeTextSource(rope.GetRange(offset, length));
}
cachedText = null; // reset cache of complete document text
fireTextChanged = true;
lock (lockObject) {
// now update the textBuffer and lineTree
if (offset == 0 && length == rope.Length)
{
// optimize replacing the whole document
rope.Clear();
var newRopeTextSource = newText as RopeTextSource;
if (newRopeTextSource != null)
{
rope.InsertRange(0, newRopeTextSource.GetRope());
}
else
{
rope.InsertText(0, newText.Text);
}
lineManager.Rebuild();
}
else
{
rope.RemoveRange(offset, length);
lineManager.Remove(offset, length);
#if DEBUG
lineTree.CheckProperties();
#endif
var newRopeTextSource = newText as RopeTextSource;
if (newRopeTextSource != null)
{
rope.InsertRange(offset, newRopeTextSource.GetRope());
}
else
{
rope.InsertText(offset, newText.Text);
}
lineManager.Insert(offset, newText);
#if DEBUG
lineTree.CheckProperties();
#endif
}
}
}
void DoReplace(int offset, int length, ITextSource newText) {
if (length == 0 && newText.TextLength == 0)
return;
ITextSource removedText;
if (length == 0) {
removedText = StringTextSource.Empty;
}
else if (length < 100) {
removedText = new StringTextSource(rope.ToString(offset, length));
}
else {
// use a rope if the removed string is long
removedText = new RopeTextSource(rope.GetRange(offset, length));
}
cachedText = null; // reset cache of complete document text
fireTextChanged = true;
lock (lockObject) {
// now update the textBuffer and lineTree
if (offset == 0 && length == rope.Length) {
// optimize replacing the whole document
rope.Clear();
var newRopeTextSource = newText as RopeTextSource;
if (newRopeTextSource != null)
rope.InsertRange(0, newRopeTextSource.GetRope());
else
rope.InsertText(0, newText.Text);
lineManager.Rebuild();
}
else {
rope.RemoveRange(offset, length);
lineManager.Remove(offset, length);
#if DEBUG
lineTree.CheckProperties();
#endif
var newRopeTextSource = newText as RopeTextSource;
if (newRopeTextSource != null)
rope.InsertRange(offset, newRopeTextSource.GetRope());
else
rope.InsertText(offset, newText.Text);
lineManager.Insert(offset, newText);
#if DEBUG
lineTree.CheckProperties();
#endif
}
}
}
/// <summary>
/// Replaces text.
/// </summary>
/// <param name="offset">The starting offset of the text to be replaced.</param>
/// <param name="length">The length of the text to be replaced.</param>
/// <param name="text">The new text.</param>
public void Replace(int offset, int length, string text) {
if (text == null)
throw new ArgumentNullException("text");
var textSource = new StringTextSource(text);
// Ensure that all changes take place inside an update group.
// Will also take care of throwing an exception if inDocumentChanging is set.
BeginUpdate();
try {
// protect document change against corruption by other changes inside the event handlers
inDocumentChanging = true;
try {
// The range verification must wait until after the BeginUpdate() call because the document
// might be modified inside the UpdateStarted event.
ThrowIfRangeInvalid(offset, length);
DoReplace(offset, length, textSource);
}
finally {
inDocumentChanging = false;
}
}
finally {
EndUpdate();
}
}
