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Viewing changes to contrib/ICSharpCode.NRefactory.CSharp/Refactoring/DocumentScript.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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contrib/ICSharpCode.NRefactory.CSharp/Refactoring/DocumentScript.cs
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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
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// 
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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// 
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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// 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.Diagnostics;
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using ICSharpCode.NRefactory.Editor;
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namespace ICSharpCode.NRefactory.CSharp.Refactoring
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{
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        /// <summary>
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        /// Script implementation based on IDocument.
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        /// </summary>
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        public class DocumentScript : Script
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        {
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                readonly IDocument currentDocument;
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                public IDocument CurrentDocument {
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                        get { return currentDocument; }
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                }
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                readonly IDocument originalDocument;
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                public IDocument OriginalDocument {
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                        get { return originalDocument; }
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                }
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                readonly IDisposable undoGroup;
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                public DocumentScript(IDocument document, CSharpFormattingOptions formattingOptions, TextEditorOptions options) : base(formattingOptions, options)
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                {
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                        this.originalDocument = document.CreateDocumentSnapshot();
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                        this.currentDocument = document;
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                        Debug.Assert(currentDocument.Version.CompareAge(originalDocument.Version) == 0);
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                        this.undoGroup = document.OpenUndoGroup();
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                }
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                public override void Dispose()
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                {
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                        if (undoGroup != null)
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                                undoGroup.Dispose();
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                        base.Dispose();
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                }
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                public override void Remove(AstNode node, bool removeEmptyLine)
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                {
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                        var segment = GetSegment (node);
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                        int startOffset = segment.Offset;
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                        int endOffset = segment.EndOffset;
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                        var startLine = currentDocument.GetLineByOffset (startOffset);
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                        var endLine = currentDocument.GetLineByOffset (endOffset);
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                        if (startLine != null && endLine != null) {
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                                bool removeStart = string.IsNullOrWhiteSpace (currentDocument.GetText (startLine.Offset, startOffset - startLine.Offset));
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                                if (removeStart)
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                                        startOffset = startLine.Offset;
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                                bool removeEnd = string.IsNullOrWhiteSpace (currentDocument.GetText (endOffset, endLine.EndOffset - endOffset));
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                                if (removeEnd)
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                                        endOffset = endLine.EndOffset;
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                                // Remove delimiter if the whole line get's removed.
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                                if (removeStart && removeEnd)
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                                        endOffset += endLine.DelimiterLength;
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                        }
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                        Replace (startOffset, endOffset - startOffset, string.Empty);
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                }
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                public override void Replace(int offset, int length, string newText)
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                {
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                        currentDocument.Replace(offset, length, newText);
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                }
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                public override int GetCurrentOffset(TextLocation originalDocumentLocation)
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                {
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                        int offset = originalDocument.GetOffset(originalDocumentLocation);
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                        return GetCurrentOffset(offset);
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                }
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                public override int GetCurrentOffset(int originalDocumentOffset)
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                {
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                        return originalDocument.Version.MoveOffsetTo(currentDocument.Version, originalDocumentOffset);
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                }
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                public override void FormatText(AstNode node)
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                {
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                        var segment = GetSegment(node);
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                        var cu = CompilationUnit.Parse(currentDocument, "dummy.cs");
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                        var formatter = new AstFormattingVisitor(FormattingOptions, currentDocument, Options);
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                        cu.AcceptVisitor(formatter);
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                        formatter.ApplyChanges(segment.Offset, segment.Length);
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                }
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                protected override int GetIndentLevelAt(int offset)
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                {
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                        var line = currentDocument.GetLineByOffset(offset);
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                        int spaces = 0;
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                        int indentationLevel = 0;
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                        for (int i = line.Offset; i < currentDocument.TextLength; i++) {
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                                char c = currentDocument.GetCharAt(i);
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                                if (c == '\t') {
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                                        spaces = 0;
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                                        indentationLevel++;
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                                } else if (c == ' ') {
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                                        spaces++;
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                                        if (spaces == 4) {
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                                                spaces = 0;
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                                                indentationLevel++;
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                                        }
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                                } else {
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                                        break;
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                                }
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                        }
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                        return indentationLevel;
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                }
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                protected override ISegment CreateTrackedSegment(int offset, int length)
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                {
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                        return new TrackedSegment(this, offset, offset + length);
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                }
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                sealed class TrackedSegment : ISegment
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                {
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                        readonly DocumentScript script;
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                        readonly ITextSourceVersion originalVersion;
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                        readonly int originalStart;
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                        readonly int originalEnd;
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                        public TrackedSegment(DocumentScript script, int originalStart, int originalEnd)
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                        {
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                                this.script = script;
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                                this.originalVersion = script.currentDocument.Version;
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                                this.originalStart = originalStart;
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                                this.originalEnd = originalEnd;
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                        }
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                        public int Offset {
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                                get { return originalVersion.MoveOffsetTo(script.currentDocument.Version, originalStart); }
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                        }
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                        public int Length {
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                                get { return this.EndOffset - this.Offset; }
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                        }
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                        public int EndOffset {
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                                get { return originalVersion.MoveOffsetTo(script.currentDocument.Version, originalEnd); }
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                        }
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                }
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        }
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}