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//
// DiffTracker.cs
//
// Author:
// Mike Krüger <mkrueger@xamarin.com>
//
// Copyright (c) 2013 Xamarin Inc. (http://xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using Mono.TextEditor.Utils;
namespace Mono.TextEditor
{
public class DiffTracker
{
class LineChangeInfo
{
public Mono.TextEditor.TextDocument.LineState state;
public LineChangeInfo (Mono.TextEditor.TextDocument.LineState state)
{
this.state = state;
}
}
CompressingTreeList<LineChangeInfo> lineStates;
TextDocument trackDocument;
// TextDocument baseDocument;
public Mono.TextEditor.TextDocument.LineState GetLineState (DocumentLine line)
{
if (line != null && lineStates != null) {
try {
var info = lineStates [line.LineNumber];
if (info != null) {
return info.state;
}
} catch (Exception) {
}
}
return Mono.TextEditor.TextDocument.LineState.Unchanged;
}
public void SetTrackDocument (TextDocument document)
{
trackDocument = document;
}
void HandleLineRemoved (object sender, LineEventArgs e)
{
if (lineStates == null)
return;
try {
lineStates.RemoveAt (e.LineNumber);
} catch (Exception ex) {
Console.WriteLine ("error while DiffTracker.HandleLineRemoved:" + ex);
}
}
void HandleLineInserted (object sender, LineEventArgs e)
{
if (lineStates == null)
return;
try {
lineStates.Insert(e.Line.LineNumber, new LineChangeInfo (Mono.TextEditor.TextDocument.LineState.Dirty));
} catch (Exception ex) {
Console.WriteLine ("error while DiffTracker.HandleLineInserted:" + ex);
}
}
void HandleLineChanged (object sender, LineEventArgs e)
{
var lineNumber = e.Line.LineNumber;
try {
if (lineStates [lineNumber].state == Mono.TextEditor.TextDocument.LineState.Dirty)
return;
lineStates [lineNumber] = new LineChangeInfo (Mono.TextEditor.TextDocument.LineState.Dirty);
if (trackDocument != null)
trackDocument.CommitLineUpdate (lineNumber);
} catch (Exception ex) {
Console.WriteLine ("error while DiffTracker.HandleLineChanged:" + ex);
}
}
public void SetBaseDocument (TextDocument document)
{
if (lineStates != null) {
foreach (var node in lineStates.tree) {
if (node.value.state == Mono.TextEditor.TextDocument.LineState.Dirty)
node.value.state = Mono.TextEditor.TextDocument.LineState.Changed;
}
} else {
lineStates = new CompressingTreeList<LineChangeInfo>((x, y) => x.Equals(y));
lineStates.InsertRange(0, document.LineCount + 1, new LineChangeInfo (Mono.TextEditor.TextDocument.LineState.Unchanged));
trackDocument.Splitter.LineChanged += HandleLineChanged;
trackDocument.Splitter.LineInserted += HandleLineInserted;
trackDocument.Splitter.LineRemoved += HandleLineRemoved;
}
}
public void Reset ()
{
lineStates = new CompressingTreeList<LineChangeInfo>((x, y) => x.Equals(y));
lineStates.InsertRange(0, trackDocument.LineCount + 1, new LineChangeInfo (Mono.TextEditor.TextDocument.LineState.Unchanged));
}
}
}
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