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Viewing changes to src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/HiddenDefinition/HiddenDefinitionRenderer.cs

  • Committer: sk
  • Date: 2011-09-10 05:17:57 UTC
  • Revision ID: halega@halega.com-20110910051757-qfouz1llya9m6boy
4.1.0.7915 Release Candidate 1

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src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/HiddenDefinition/HiddenDefinitionRenderer.cs
 
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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
 
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// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
 
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using System;
 
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using System.Windows.Controls.Primitives;
 
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using ICSharpCode.Core.Presentation;
 
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using ICSharpCode.SharpDevelop.Editor;
 
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using ICSharpCode.SharpDevelop.Gui;
 
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namespace ICSharpCode.AvalonEdit.AddIn.HiddenDefinition
 
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{
 
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        public class HiddenDefinitionRenderer : IDisposable
 
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        {
 
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                private CodeEditorView editor;
 
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                private ExtendedPopup popup = new ExtendedPopup();
 
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                private HiddenDefinitionControl control;
 
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                public HiddenDefinitionRenderer(CodeEditorView editorView)
 
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                {
 
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                        this.editor = editorView;
 
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                        control = new HiddenDefinitionControl();
 
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                        WorkbenchSingleton.Workbench.ActiveContentChanged += WorkbenchSingleton_Workbench_ActiveContentChanged;
 
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                }
 
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                public BracketSearchResult BracketSearchResult { get; set; }
 
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                public void Dispose()
 
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                {
 
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                        WorkbenchSingleton.Workbench.ActiveContentChanged -= WorkbenchSingleton_Workbench_ActiveContentChanged;
 
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                        ClosePopup();
 
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                        popup = null;
 
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                }
 
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                public void ClosePopup()
 
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                {
 
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                        if (popup.IsOpen)
 
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                                popup.IsOpen = false;
 
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                }
 
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                public void Show()
 
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                {
 
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                        ClosePopup();
 
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                        if (BracketSearchResult == null) return;
 
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                        // verify if we have a open bracket
 
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                        if (this.editor.Document.GetCharAt(BracketSearchResult.OpeningBracketOffset) != '{')
 
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                                return;
 
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                        var line = GetLineText(BracketSearchResult.OpeningBracketOffset);
 
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                        if(line == null) return;
 
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                        control.DefinitionText = line;
 
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                        popup.Child = control;
 
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                        popup.HorizontalOffset = 70;
 
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                        popup.Placement = PlacementMode.Relative;
 
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                        popup.PlacementTarget = editor.TextArea;
 
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                        popup.IsOpen = true;
 
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                }
 
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                /// <summary>
 
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                /// Gets the line text near the offset.
 
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                /// </summary>
 
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                /// <param name="offset">Offset.</param>
 
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                /// <returns></returns>
 
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                private string GetLineText(int offset)
 
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                {
 
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                        if (!editor.TextArea.TextView.VisualLinesValid)
 
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                                return null;
 
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                        // get line
 
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                        var documentLine = editor.Document.GetLineByOffset(offset);
 
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                        string documentText = editor.Document.Text;
 
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                        string lineText = string.Empty;
 
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                        int off, length;
 
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                        do {
 
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                                if (documentLine == null || documentLine.IsDeleted) return null;
 
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                                off = documentLine.Offset;
 
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                                length = documentLine.Length;
 
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                                lineText = documentText.Substring(off, length).Trim();
 
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                                documentLine = documentLine.PreviousLine;
 
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                        }
 
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                        while (lineText == "{" || string.IsNullOrEmpty(lineText) ||
 
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                               lineText.StartsWith("//") || lineText.StartsWith("/*") ||
 
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                               lineText.StartsWith("*") || lineText.StartsWith("'"));
 
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                        // check whether the line is visible
 
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                        if (editor.TextArea.TextView.VisualLines[0].StartOffset > off) {
 
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                                return this.editor.TextArea.TextView.Document.GetText(off, length);
 
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                        }
 
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                        return null;
 
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                }
 
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                private void WorkbenchSingleton_Workbench_ActiveContentChanged(object sender, EventArgs e)
 
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                {
 
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                        ClosePopup();
 
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                }
 
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        }
 
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}
 
 
b'\\ No newline at end of file'