Siegfried Pammer
14 years ago
5 changed files with 4 additions and 322 deletions
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@@ -1,317 +0,0 @@
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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.Linq; |
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using System.Text; |
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using System.Windows; |
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using System.Windows.Documents; |
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using System.Windows.Input; |
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using ICSharpCode.AvalonEdit.Document; |
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using ICSharpCode.AvalonEdit.Editing; |
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using ICSharpCode.Core; |
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using ICSharpCode.SharpDevelop; |
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using ICSharpCode.SharpDevelop.Gui; |
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namespace ICSharpCode.AvalonEdit.AddIn |
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{ |
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/// <summary>
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/// IncrementalSearch handler for AvalonEdit.
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/// </summary>
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public sealed class IncrementalSearch : ITextAreaInputHandler |
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{ |
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readonly LogicalDirection direction; |
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readonly TextArea textArea; |
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StringBuilder searchText = new StringBuilder(); |
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string text; |
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int startIndex; |
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int originalStartIndex; |
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bool passedEndOfDocument; |
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public IncrementalSearch(TextArea textArea, LogicalDirection direction) |
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{ |
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if (textArea == null) |
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throw new ArgumentNullException("textArea"); |
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this.textArea = textArea; |
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this.direction = direction; |
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} |
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#region Attach + Detach
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TextArea ITextAreaInputHandler.TextArea { |
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get { return textArea; } |
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} |
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void ITextAreaInputHandler.Attach() |
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{ |
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textArea.PreviewKeyDown += textArea_PreviewKeyDown; |
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textArea.TextEntering += textArea_TextEntering; |
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textArea.LostFocus += textArea_LostFocus; |
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textArea.PreviewMouseDown += textArea_PreviewMouseDown; |
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EnableIncrementalSearchCursor(); |
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// Get text to search and initial search position.
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text = textArea.Document.Text; |
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startIndex = textArea.Caret.Offset; |
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originalStartIndex = startIndex; |
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GetInitialSearchText(); |
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ShowTextFound(searchText.ToString()); |
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} |
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void ITextAreaInputHandler.Detach() |
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{ |
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textArea.PreviewKeyDown -= textArea_PreviewKeyDown; |
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textArea.TextEntering -= textArea_TextEntering; |
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textArea.LostFocus -= textArea_LostFocus; |
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textArea.PreviewMouseDown -= textArea_PreviewMouseDown; |
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DisableIncrementalSearchCursor(); |
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ClearStatusBarMessage(); |
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} |
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public void StopIncrementalSearch() |
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{ |
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if (textArea.ActiveInputHandler == this) { |
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textArea.ActiveInputHandler = textArea.DefaultInputHandler; |
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} |
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} |
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/// <summary>
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/// Gets the initial text to include in the incremental search.
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/// </summary>
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/// <remarks>
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/// If multiple lines are selected then no initial search text
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/// is set.
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/// </remarks>
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void GetInitialSearchText() |
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{ |
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if (!textArea.Selection.IsEmpty) { |
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startIndex = textArea.Selection.SurroundingSegment.Offset; |
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if (!textArea.Selection.IsMultiline(textArea.Document)) { |
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searchText.Append(textArea.Selection.GetText(textArea.Document)); |
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} |
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} |
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} |
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/// <summary>
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/// Changes the text editor's cursor so the user knows we are in
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/// incremental search mode.
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/// </summary>
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void EnableIncrementalSearchCursor() |
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{ |
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string resourceName = "ICSharpCode.AvalonEdit.AddIn.Resources.IncrementalSearchCursor.cur"; |
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if (direction == LogicalDirection.Backward) { |
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resourceName = "ICSharpCode.AvalonEdit.AddIn.Resources.ReverseIncrementalSearchCursor.cur"; |
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} |
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textArea.Cursor = new Cursor(GetType().Assembly.GetManifestResourceStream(resourceName)); |
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} |
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void DisableIncrementalSearchCursor() |
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{ |
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textArea.ClearValue(TextArea.CursorProperty); |
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} |
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#endregion
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#region Status bar functions
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/// <summary>
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/// Shows the status bar message. All messages are prefixed
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/// with the standard Incremental Search string.
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/// </summary>
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void ShowTextFound(string find) |
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{ |
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if (passedEndOfDocument) { |
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ShowMessage(String.Concat(find, StringParser.Parse(" ${res:ICSharpCode.SharpDevelop.DefaultEditor.IncrementalSearch.PassedEndOfDocumentStatusBarMessage}")), true); |
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} else { |
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ShowMessage(find, false); |
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} |
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} |
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/// <summary>
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/// Shows a highlighed status bar message.
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/// </summary>
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void ShowMessage(string message, bool highlight) |
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{ |
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string incrementalSearchStartMessage; |
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if (direction == LogicalDirection.Forward) { |
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incrementalSearchStartMessage = StringParser.Parse("${res:ICSharpCode.SharpDevelop.DefaultEditor.IncrementalSearch.ForwardsSearchStatusBarMessage} "); |
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} else { |
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incrementalSearchStartMessage = StringParser.Parse("${res:ICSharpCode.SharpDevelop.DefaultEditor.IncrementalSearch.ReverseSearchStatusBarMessage} "); |
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} |
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string fullMessage = incrementalSearchStartMessage + message; |
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WorkbenchSingleton.StatusBar.SetMessage(fullMessage, highlight); |
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} |
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/// <summary>
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/// Shows a status bar message indicating that the specified text
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/// was not found.
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/// </summary>
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void ShowTextNotFound(string find) |
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{ |
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ShowMessage(find + StringParser.Parse(" ${res:ICSharpCode.SharpDevelop.DefaultEditor.IncrementalSearch.NotFoundStatusBarMessage}"), true); |
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} |
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/// <summary>
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/// Clears the status bar message.
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/// </summary>
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void ClearStatusBarMessage() |
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{ |
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WorkbenchSingleton.StatusBar.SetMessage(String.Empty); |
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} |
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#endregion
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#region Running the search
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void HighlightText(int offset, int length) |
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{ |
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int endOffset = offset + length; |
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textArea.Caret.Offset = endOffset; |
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textArea.Selection = new SimpleSelection(offset, endOffset); |
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textArea.Caret.BringCaretToView(); |
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} |
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/// <summary>
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/// Runs the incremental search either forwards or backwards.
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/// </summary>
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void RunSearch() |
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{ |
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string find = searchText.ToString(); |
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int index = FindText(find, startIndex); |
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if (index == -1) { |
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index = FindText(find, GetWrapAroundStartIndex()); |
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passedEndOfDocument = true; |
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} |
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// Highlight found text and show status bar message.
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if (index >= 0) { |
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startIndex = index; |
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HighlightText(index, find.Length); |
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ShowTextFound(find); |
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} else { |
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ShowTextNotFound(find); |
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} |
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} |
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/// <summary>
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/// Gets the index the search should start from when we wrap around. This
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/// is either the start of the string or the very end depending on which
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/// way we are searching.
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/// </summary>
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int GetWrapAroundStartIndex() |
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{ |
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int wrapAroundIndex = 0; |
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if (direction == LogicalDirection.Backward) { |
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wrapAroundIndex = text.Length - 1; |
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} |
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return wrapAroundIndex; |
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} |
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/// <summary>
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/// Looks for the string from the last position we searched from. The
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/// search is case insensitive if all the characters of the search
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/// string are lower case. If one of the search characters is upper case
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/// then the search is case sensitive. The search can be either forwards
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/// or backwards.
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/// </summary>
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int FindText(string find, int startIndex) |
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{ |
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StringComparison stringComparison = GetStringComparisonType(find); |
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if (direction == LogicalDirection.Forward) { |
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return text.IndexOf(find, startIndex, stringComparison); |
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} else { |
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// Reverse search.
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string searchText = GetReverseSearchText(startIndex + find.Length); |
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return searchText.LastIndexOf(find, stringComparison); |
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} |
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} |
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/// <summary>
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/// Gets whether the search string comparision should be case
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/// sensitive. If all the characters of the find string are lower case
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/// then the search is case insensitive. If any character is upper case
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/// then the search is case sensitive.
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/// </summary>
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StringComparison GetStringComparisonType(string find) |
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{ |
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foreach (char c in find) { |
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if (Char.IsUpper(c)) { |
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return StringComparison.InvariantCulture; |
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} |
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} |
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return StringComparison.InvariantCultureIgnoreCase; |
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} |
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/// <summary>
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/// Gets the text to search when doing a reverse search.
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/// </summary>
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string GetReverseSearchText(int endIndex) |
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{ |
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if (endIndex < text.Length) { |
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return text.Substring(0, endIndex); |
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} |
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endIndex = text.Length - 1; |
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if (endIndex >= 0) { |
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return text; |
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} |
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return String.Empty; |
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} |
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#endregion
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#region Event Handlers
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void textArea_PreviewKeyDown(object sender, KeyEventArgs e) |
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{ |
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switch (e.Key) { |
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case Key.Enter: |
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case Key.Escape: |
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e.Handled = true; |
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StopIncrementalSearch(); |
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break; |
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case Key.Back: |
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// Remove last search char and try search again.
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int length = searchText.Length; |
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if (length > 0) { |
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searchText.Remove(length - 1, 1); |
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// Run search back at original starting point.
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startIndex = originalStartIndex; |
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passedEndOfDocument = false; |
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RunSearch(); |
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e.Handled = true; |
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} else { |
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StopIncrementalSearch(); |
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} |
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break; |
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default: |
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TextAreaInputHandler[] rootHandlers = { textArea.DefaultInputHandler }; |
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var allHandlers = rootHandlers.Flatten(h => h.NestedInputHandlers.OfType<TextAreaInputHandler>()); |
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var keyGestures = allHandlers.SelectMany(h => h.InputBindings).Select(h => h.Gesture).OfType<KeyGesture>(); |
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foreach (KeyGesture gesture in keyGestures) { |
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if (gesture.Key == e.Key) { |
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StopIncrementalSearch(); |
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break; |
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} |
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} |
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break; |
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} |
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} |
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void textArea_TextEntering(object sender, TextCompositionEventArgs e) |
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{ |
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searchText.Append(e.Text); |
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e.Handled = true; |
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RunSearch(); |
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} |
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void textArea_LostFocus(object sender, RoutedEventArgs e) |
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{ |
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StopIncrementalSearch(); |
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} |
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void textArea_PreviewMouseDown(object sender, MouseButtonEventArgs e) |
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{ |
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StopIncrementalSearch(); |
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} |
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#endregion
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} |
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} |
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