/// <include file='doc\EditArray.uex' path='docs/doc[@for="EditArray.Add"]/*' />
/// <summary>
/// Add a new atomic edit to the array. The edits cannot intersect each other.
/// The spans in each edit must be based on the current state of the buffer,
/// and not based on post-edit spans. This EditArray will calculate the
/// post edit spans for you.
/// </summary>
/// <param name="editSpan"></param>
public void Add(EditSpan editSpan)
{
if (editSpan == null)
{
throw new ArgumentNullException("editSpan");
}
for (int i = this.editList.Count - 1; i >= 0; i--)
{
EditSpan e = (EditSpan)this.editList[i];
if (TextSpanHelper.Intersects(editSpan.Span, e.Span))
{
string msg = SR.GetString(SR.EditIntersects, i);
#if LANGTRACE
Debug.Assert(false, msg);
TraceEdits();
#endif
throw new System.ArgumentException(msg);
}
if (TextSpanHelper.StartsAfterStartOf(editSpan.Span, e.Span))
{
this.editList.Insert(i + 1, editSpan);
return;
}
}
this.editList.Insert(0, editSpan);
}
void Apply()
{
// use original edit spans to update the selection location so that we get the finest
// granied selection update possible. It should not be done on merged edits.
ArrayList edits = this.editList;
if (this.view != null)
{
// Now calculate the updated selection position based on what the edits are going to
// do to the buffer.
this.UpdateSelection(edits);
}
if (merge)
{
// Merge the edits into larger chunks for performance reasons.
edits = this.MergeEdits(edits);
}
// Now apply the edits in reverse order because that one each edit will not interfere with the
// span of the next edit.
for (int i = edits.Count - 1; i >= 0; i--)
{
EditSpan es = (EditSpan)edits[i];
TextSpan span = es.Span;
string text = es.Text;
this.source.SetText(span, text);
}
this.editList.Clear(); // done!
}
void AddCombinedEdit(EditSpan combined, StringBuilder buffer, ArrayList merged)
{
if (combined != null)
{
// add combined edit span.
combined.Text = buffer.ToString();
merged.Add(combined);
buffer.Length = 0;
}
}
/// <include file='doc\EditArray.uex' path='docs/doc[@for="EditArray.ToString"]/*' />
public override string ToString()
{
StringBuilder s = new StringBuilder();
for (int i = this.editList.Count - 1; i >= 0; i--)
{
EditSpan e = (EditSpan)this.editList[i];
s.AppendFormat("({0},{1}:{2},{3}) >>> '{4}'", e.Span.iStartLine, e.Span.iStartIndex, e.Span.iEndLine, e.Span.iEndIndex, GetDebugString(e.Text));
s.AppendLine();
}
return(s.ToString());
}
void TraceEdits()
{
for (int j = 0; j < this.editList.Count - 1; j++)
{
EditSpan f = (EditSpan)this.editList[j];
TextSpan span = f.Span;
string t = this.source.GetText(span);
Trace.WriteLine(
string.Format("{0}: {1},{2},{3},{4} '{5}'=>'{6}'",
j, span.iStartLine, span.iStartIndex, span.iEndLine, span.iEndIndex,
GetDebugString(t), GetDebugString(f.Text)));
}
}
const int ChunkThreshold = 1000; // don't combine chunks separate by more than 1000 characters.
ArrayList MergeEdits(ArrayList edits)
{
StringBuilder buffer = new StringBuilder();
EditSpan combined = null;
ArrayList merged = new ArrayList();
ArrayList markers = GetTextMarkers();
int markerPos = 0;
TextSpan marker = (markers.Count > 0) ? (TextSpan)markers[0] : new TextSpan();
foreach (EditSpan editSpan in edits)
{
TextSpan span = editSpan.Span;
string text = editSpan.Text;
if (markerPos < markers.Count &&
(TextSpanHelper.StartsAfterStartOf(span, marker) || TextSpanHelper.EndsAfterStartOf(span, marker)))
{
AddCombinedEdit(combined, buffer, merged);
if (TextSpanHelper.Intersects(span, marker))
{
combined = null;
// Have to apply this as a distinct edit operation.
merged.Add(editSpan);
}
else
{
combined = editSpan;
buffer.Append(text);
}
while (++markerPos < markers.Count)
{
marker = (TextSpan)markers[markerPos];
if (!TextSpanHelper.StartsAfterStartOf(span, marker) && !TextSpanHelper.EndsAfterStartOf(span, marker))
{
break;
}
}
}
else if (combined == null)
{
combined = editSpan;
buffer.Append(text);
}
else
{
// A little sanity check here, if there are too many characters in between the two
// edits, then keep them separate.
TextSpan s = combined.Span;
string between = this.source.GetText(s.iEndLine, s.iEndIndex, span.iStartLine, span.iStartIndex);
if (between.Length > ChunkThreshold)
{
AddCombinedEdit(combined, buffer, merged);
combined = editSpan;
buffer.Append(text);
}
else
{
// merge edit spans by adding the text in-between the current and previous spans.
buffer.Append(between);
buffer.Append(text); // and add the new text.
s.iEndIndex = span.iEndIndex;
s.iEndLine = span.iEndLine;
combined.Span = s;
}
}
}
AddCombinedEdit(combined, buffer, merged);
return(merged);
}
void AddCombinedEdit(EditSpan combined, StringBuilder buffer, ArrayList merged)
{
if (combined != null) {
// add combined edit span.
combined.Text = buffer.ToString();
merged.Add(combined);
buffer.Length = 0;
}
}
/// <include file='doc\EditArray.uex' path='docs/doc[@for="EditArray.Add"]/*' />
/// <summary>
/// Add a new atomic edit to the array. The edits cannot intersect each other.
/// The spans in each edit must be based on the current state of the buffer,
/// and not based on post-edit spans. This EditArray will calculate the
/// post edit spans for you.
/// </summary>
/// <param name="editSpan"></param>
public void Add(EditSpan editSpan)
{
if (editSpan == null) {
throw new ArgumentNullException("editSpan");
}
for (int i = this.editList.Count - 1; i>=0; i--){
EditSpan e = (EditSpan)this.editList[i];
if (TextSpanHelper.Intersects(editSpan.Span, e.Span)){
string msg = SR.GetString(SR.EditIntersects, i);
#if LANGTRACE
Debug.Assert(false, msg);
TraceEdits();
#endif
throw new System.ArgumentException(msg);
}
if (TextSpanHelper.StartsAfterStartOf(editSpan.Span, e.Span)) {
this.editList.Insert(i + 1, editSpan);
return;
}
}
this.editList.Insert(0, editSpan);
}
public override TextSpan UncommentLines(TextSpan span, string lineComment)
{
// Remove line comments
int clen = lineComment.Length;
var editMgr = new EditArray(this, null, true, "UncommentLines");
for (int line = span.iStartLine; line <= span.iEndLine; line++) {
int i = this.ScanToNonWhitespaceChar(line);
string text = base.GetLine(line);
if ((i + clen) <= text.Length && text.Substring(i, clen) == lineComment) {
var es = new EditSpan(new TextSpan() {
iEndLine = line,
iStartLine = line,
iStartIndex = i,
iEndIndex = i + clen
}, "");
editMgr.Add(es); // remove line comment.
if (line == span.iStartLine && span.iStartIndex != 0)
span.iStartIndex = i;
}
}
editMgr.ApplyEdits();
span.iStartIndex = 0;
return span;
}