source: stable/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/Search/SearchCommands.cs @ 16662

// Copyright (c) 2014 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.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Threading;
using ICSharpCode.AvalonEdit.Document;
using ICSharpCode.AvalonEdit.Editing;
using ICSharpCode.AvalonEdit.Rendering;

namespace ICSharpCode.AvalonEdit.Search
{
  /// <summary>
  /// Search commands for AvalonEdit.
  /// </summary>
  public static class SearchCommands
  {
    /// <summary>
    /// Finds the next occurrence in the file.
    /// </summary>
    public static readonly RoutedCommand FindNext = new RoutedCommand(
      "FindNext", typeof(SearchPanel),
      new InputGestureCollection { new KeyGesture(Key.F3) }
    );
    
    /// <summary>
    /// Finds the previous occurrence in the file.
    /// </summary>
    public static readonly RoutedCommand FindPrevious = new RoutedCommand(
      "FindPrevious", typeof(SearchPanel),
      new InputGestureCollection { new KeyGesture(Key.F3, ModifierKeys.Shift) }
    );
    
    /// <summary>
    /// Closes the SearchPanel.
    /// </summary>
    public static readonly RoutedCommand CloseSearchPanel = new RoutedCommand(
      "CloseSearchPanel", typeof(SearchPanel),
      new InputGestureCollection { new KeyGesture(Key.Escape) }
    );
  }
  
  /// <summary>
  /// TextAreaInputHandler that registers all search-related commands.
  /// </summary>
  public class SearchInputHandler : TextAreaInputHandler
  {
    /// <summary>
    /// Creates a new SearchInputHandler and registers the search-related commands.
    /// </summary>
    [Obsolete("Use SearchPanel.Install instead")]
    public SearchInputHandler(TextArea textArea)
      : base(textArea)
    {
      RegisterCommands(this.CommandBindings);
      panel = SearchPanel.Install(textArea);
    }
    
    internal SearchInputHandler(TextArea textArea, SearchPanel panel)
      : base(textArea)
    {
      RegisterCommands(this.CommandBindings);
      this.panel = panel;
    }
    
    void RegisterCommands(ICollection<CommandBinding> commandBindings)
    {
      commandBindings.Add(new CommandBinding(ApplicationCommands.Find, ExecuteFind));
      commandBindings.Add(new CommandBinding(SearchCommands.FindNext, ExecuteFindNext, CanExecuteWithOpenSearchPanel));
      commandBindings.Add(new CommandBinding(SearchCommands.FindPrevious, ExecuteFindPrevious, CanExecuteWithOpenSearchPanel));
      commandBindings.Add(new CommandBinding(SearchCommands.CloseSearchPanel, ExecuteCloseSearchPanel, CanExecuteWithOpenSearchPanel));
    }
    
    SearchPanel panel;
    
    void ExecuteFind(object sender, ExecutedRoutedEventArgs e)
    {
      panel.Open();
      if (!(TextArea.Selection.IsEmpty || TextArea.Selection.IsMultiline))
        panel.SearchPattern = TextArea.Selection.GetText();
      Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Input, (Action)delegate { panel.Reactivate(); });
    }

    void CanExecuteWithOpenSearchPanel(object sender, CanExecuteRoutedEventArgs e)
    {
      if (panel.IsClosed) {
        e.CanExecute = false;
        // Continue routing so that the key gesture can be consumed by another component.
        e.ContinueRouting = true;
      } else {
        e.CanExecute = true;
        e.Handled = true;
      }
    }
    
    void ExecuteFindNext(object sender, ExecutedRoutedEventArgs e)
    {
      if (!panel.IsClosed) {
        panel.FindNext();
        e.Handled = true;
      }
    }
    
    void ExecuteFindPrevious(object sender, ExecutedRoutedEventArgs e)
    {
      if (!panel.IsClosed) {
        panel.FindPrevious();
        e.Handled = true;
      }
    }
    
    void ExecuteCloseSearchPanel(object sender, ExecutedRoutedEventArgs e)
    {
      if (!panel.IsClosed) {
        panel.Close();
        e.Handled = true;
      }
    }
    
    /// <summary>
    /// Fired when SearchOptions are modified inside the SearchPanel.
    /// </summary>
    public event EventHandler<SearchOptionsChangedEventArgs> SearchOptionsChanged {
      add { panel.SearchOptionsChanged += value; }
      remove { panel.SearchOptionsChanged -= value; }
    }
  }
}