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// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
//
// 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 System.Linq;
using System.Diagnostics;
using ICSharpCode.NRefactory.Editor;
using System.Collections.Generic;
namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
/// <summary>
/// Script implementation based on IDocument.
/// </summary>
public class DocumentScript : Script
{
readonly IDocument currentDocument;
public IDocument CurrentDocument {
get { return currentDocument; }
}
readonly IDocument originalDocument;
public IDocument OriginalDocument {
get { return originalDocument; }
}
readonly IDisposable undoGroup;
public DocumentScript(IDocument document, CSharpFormattingOptions formattingOptions, TextEditorOptions options) : base(formattingOptions, options)
{
this.originalDocument = document.CreateDocumentSnapshot();
this.currentDocument = document;
Debug.Assert(currentDocument.Version.CompareAge(originalDocument.Version) == 0);
this.undoGroup = document.OpenUndoGroup();
}
public override void Dispose()
{
// Since base.Dispose() reformats some nodes; we need to include it in the undo group
base.Dispose();
if (undoGroup != null)
undoGroup.Dispose();
}
public override void Remove(AstNode node, bool removeEmptyLine)
{
var segment = GetSegment (node);
int startOffset = segment.Offset;
int endOffset = segment.EndOffset;
var startLine = currentDocument.GetLineByOffset (startOffset);
var endLine = currentDocument.GetLineByOffset (endOffset);
if (startLine != null && endLine != null) {
bool removeStart = string.IsNullOrWhiteSpace (currentDocument.GetText (startLine.Offset, startOffset - startLine.Offset));
if (removeStart)
startOffset = startLine.Offset;
bool removeEnd = string.IsNullOrWhiteSpace (currentDocument.GetText (endOffset, endLine.EndOffset - endOffset));
if (removeEnd)
endOffset = endLine.EndOffset;
// Remove delimiter if the whole line get's removed.
if (removeStart && removeEnd)
endOffset += endLine.DelimiterLength;
}
Replace (startOffset, endOffset - startOffset, string.Empty);
}
public override void Replace(int offset, int length, string newText)
{
currentDocument.Replace(offset, length, newText);
}
public override int GetCurrentOffset(TextLocation originalDocumentLocation)
{
int offset = originalDocument.GetOffset(originalDocumentLocation);
return GetCurrentOffset(offset);
}
public override int GetCurrentOffset(int originalDocumentOffset)
{
return originalDocument.Version.MoveOffsetTo(currentDocument.Version, originalDocumentOffset);
}
public override void FormatText(IEnumerable<AstNode> nodes)
{
var syntaxTree = SyntaxTree.Parse(currentDocument, "dummy.cs");
var formatter = new CSharpFormatter(FormattingOptions, Options);
var segments = new List<ISegment>();
foreach (var node in nodes.OrderByDescending (n => n.StartLocation)) {
var segment = GetSegment(node);
formatter.AddFormattingRegion (new ICSharpCode.NRefactory.TypeSystem.DomRegion (
currentDocument.GetLocation (segment.Offset),
currentDocument.GetLocation (segment.EndOffset)
));
segments.Add(segment);
}
if (segments.Count == 0)
return;
var changes = formatter.AnalyzeFormatting (currentDocument, syntaxTree);
foreach (var segment in segments) {
changes.ApplyChanges(segment.Offset, segment.Length - 1);
}
}
protected override int GetIndentLevelAt(int offset)
{
var line = currentDocument.GetLineByOffset(offset);
int spaces = 0;
int indentationLevel = 0;
for (int i = line.Offset; i < currentDocument.TextLength; i++) {
char c = currentDocument.GetCharAt(i);
if (c == '\t') {
spaces = 0;
indentationLevel++;
} else if (c == ' ') {
spaces++;
if (spaces == 4) {
spaces = 0;
indentationLevel++;
}
} else {
break;
}
}
return indentationLevel;
}
protected override ISegment CreateTrackedSegment(int offset, int length)
{
return new TrackedSegment(this, offset, offset + length);
}
sealed class TrackedSegment : ISegment
{
readonly DocumentScript script;
readonly ITextSourceVersion originalVersion;
readonly int originalStart;
readonly int originalEnd;
public TrackedSegment(DocumentScript script, int originalStart, int originalEnd)
{
this.script = script;
this.originalVersion = script.currentDocument.Version;
this.originalStart = originalStart;
this.originalEnd = originalEnd;
}
public int Offset {
get { return originalVersion.MoveOffsetTo(script.currentDocument.Version, originalStart); }
}
public int Length {
get { return this.EndOffset - this.Offset; }
}
public int EndOffset {
get { return originalVersion.MoveOffsetTo(script.currentDocument.Version, originalEnd); }
}
}
}
}
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