misckeys.cs

c#精彩编程百例（源代码）

// MiscKeys.cs 
// Copyright (C) 2000 Mike Krueger
// Copyright (C) 2000 Andrea Paatz
// Copyright (C) 2000 Jeppe Cramon
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

using System.Drawing;
using System.Windows.Forms;
using System;

using SharpDevelop.Tool.Data;
using SharpDevelop.Gui.Edit.Text;
using SharpDevelop.Gui.Edit.Text.TemplateCompletion;
using SharpDevelop.Actions;
using SharpDevelop.Internal.Text;


namespace SharpDevelop.Actions.Edit {

	public class Tab : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			if (executor.TextArea.Buffer.ReadOnly)
				return;
			
			if (executor.TextArea.Selection.HasSomethingSelected) {
				int min = executor.TextArea.Selection.RealStart.Y;
				int max = executor.TextArea.Selection.RealEnd.Y;
				if (executor.TextArea.Selection.RealEnd.X == 0)
					--max;
				
				for (int i = min; i <= max; ++i) 
					executor.TextArea.Buffer.Insert(new Point(0, i), "\t");
				
				executor.TextArea.Buffer.UndoStack.UndoLast(max - min + 1);
				
				executor.TextArea.UpdateLines(min, max);
			} else {
				executor.TextArea.ClipboardHandler.Delete(null, null);
				
				bool overwritten = false;
				
				if (!executor.TextArea.Caret.InsertMode && executor.TextArea.Caret.CaretPos.X < executor.TextArea.Buffer[executor.TextArea.Caret.CaretPos.Y].Text.Length) {
					executor.TextArea.Buffer.Delete(executor.TextArea.Caret.CaretPos, new Point(executor.TextArea.Caret.CaretPos.X + 1, executor.TextArea.Caret.CaretPos.Y));
					overwritten = true;
				}
				
				Point pos = executor.TextArea.Buffer.Insert(executor.TextArea.Caret.CaretPos, "\t");
				executor.TextArea.Caret.CaretPos  = pos;
				executor.TextArea.Caret.SetUpDownPos();
				
				executor.TextArea.UpdateLines(pos.Y, pos.Y);
				if (overwritten)
					executor.TextArea.UndoStack.UndoLast(2);
				
			}
		}
	}
	
	public class ShiftTab : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			if (executor.TextArea.Buffer.ReadOnly)
				return;
			
			if (executor.TextArea.Selection.HasSomethingSelected) {
				int min = executor.TextArea.Selection.RealStart.Y;
				int max = executor.TextArea.Selection.RealEnd.Y;
				
				if (executor.TextArea.Selection.RealEnd.X == 0)
					--max;
				
				for (int i = min; i <= max; ++i)
					if (executor.TextArea.Buffer[i].Text.Length > 0 && executor.TextArea.Buffer[i].Text[0] == '\t') {
						executor.TextArea.Buffer.Delete(new Point(0, i), new Point(1, i));
					}
				
				executor.TextArea.Buffer.UndoStack.UndoLast(max - min + 1);
				
				executor.TextArea.UpdateLines(min, max);
			} else {
				Point pos = executor.TextArea.Caret.CaretPos;
				Point opos = pos;
				pos.X = Math.Max(0, pos.X - executor.TextArea.Options.TabIndent);
				executor.TextArea.Caret.CaretPos = pos;
				executor.TextArea.Caret.SetUpDownPos();
			}
		}
	}
	
	
	public class Backspace : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			if (executor.TextArea.Buffer.ReadOnly)
				return;
			
			Point pos = executor.TextArea.Selection.RealStart;
			int min   = pos.Y;
			
			if (executor.TextArea.Selection.HasSomethingSelected) {
				executor.TextArea.ClipboardHandler.Delete(null, null);
				return;
			}
			
			pos = executor.TextArea.Caret.CaretPos;
			if (pos.X > 0) {
				--pos.X;
				executor.TextArea.Buffer.Delete(pos, new Point(pos.X + 1, pos.Y));
				executor.TextArea.UpdateLines(pos.Y, pos.Y);
				executor.TextArea.Caret.CaretPos = pos;
			}
			else
				if (pos.Y > 0) {
					pos = new Point(executor.TextArea.Buffer[pos.Y - 1].Text.Length, pos.Y - 1);
					executor.TextArea.Buffer.Delete(pos, new Point(0, pos.Y + 1));
					executor.TextArea.UpdateToEnd(pos.Y);
					executor.TextArea.Caret.CaretPos = pos;
				}
			executor.TextArea.Caret.SetUpDownPos();
		}
	}
	
	public class Delete : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			if (executor.TextArea.Buffer.ReadOnly)
				return;
			
			if (executor.TextArea.Selection.HasSomethingSelected) {
				executor.TextArea.ClipboardHandler.Delete(null, null);
				return;
			}
			Point pos = executor.TextArea.Caret.CaretPos;
			if (pos.X < executor.TextArea.Buffer[pos.Y].Text.Length) {
				executor.TextArea.Buffer.Delete(pos, new Point(pos.X + 1, pos.Y));
				executor.TextArea.UpdateLines(pos.Y, pos.Y);
			} else 
				if (pos.Y < executor.TextArea.Buffer.Length - 1) {
					executor.TextArea.Buffer.Delete(pos, new Point(0, pos.Y + 1));
					executor.TextArea.UpdateToEnd(pos.Y);
				}
		}
	}
	
	public class Cut : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			executor.TextArea.ClipboardHandler.Cut(null, null);
		}
	}
	
	public class Copy : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			executor.TextArea.ClipboardHandler.Copy(null, null);
	    }
		
	}
	
	public class Paste : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			executor.TextArea.ClipboardHandler.Paste(null, null);
	    }
	}
	
	
	public class ToggleEditMode : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			executor.TextArea.Caret.InsertMode = !executor.TextArea.Caret.InsertMode;
			executor.TextArea.Caret.CaretPos = executor.TextArea.Caret.CaretPos;
		}
	}
	
	public class Return : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			if (executor.TextArea.Buffer.ReadOnly)
				return;
			executor.TextArea.ClipboardHandler.Delete(null, null);
			
			Point pos = executor.TextArea.Buffer.Insert(executor.TextArea.Caret.CaretPos, "\n");
			pos.X = Indent.IndentLine(executor.TextArea.Buffer, pos.Y, executor.TextArea.Options.IndentStyle);
			
			if (executor.TextArea.Options.AutoInsertCurlyBracket && 
				executor.TextArea.Caret.CaretPos.X - 1 > 0 &&
				executor.TextArea.Buffer[executor.TextArea.Caret.CaretPos.Y].Text.Length > 0 &&
				executor.TextArea.Buffer[executor.TextArea.Caret.CaretPos.Y].Text[executor.TextArea.Caret.CaretPos.X - 1] == '{') {
						
			    executor.TextArea.Buffer.Insert(pos, "\n}");
				Indent.IndentLine(executor.TextArea.Buffer, pos.Y + 1, executor.TextArea.Options.IndentStyle);
				Indent.IndentLine(executor.TextArea.Buffer, pos.Y + 2, executor.TextArea.Options.IndentStyle);
			}
				
			executor.TextArea.Caret.CaretPos = pos;
			executor.TextArea.UpdateToEnd(pos.Y - 1);
			executor.TextArea.Caret.SetUpDownPos();
		}
	}
	
	public class IndentSelection : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			if (executor.TextArea.Buffer.ReadOnly) 
				return;
			if (executor.TextArea.Selection.HasSomethingSelected) {
				int y1 = executor.TextArea.Selection.RealStart.Y;
				int y2 = executor.TextArea.Selection.RealEnd.Y;
				Indent.IndentLines(executor.TextArea.Buffer, y1, y2, executor.TextArea.Options.IndentStyle);
				executor.TextArea.Refresh(); // TODO : LineUpdate
			}
		}
	}
	
	public class TextAreaOptions : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			new SharpDevelop.Gui.Dialogs.OptionsDialog("Buffer Options", executor.TextArea.Options).ShowDialog();
			executor.TextArea.Refresh();
		}
	}
	
	public class ToggleComment : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			if (executor.TextArea.Buffer.ReadOnly) 
				return;
			
			int y1 = executor.TextArea.Selection.RealStart.Y;
			int y2 = executor.TextArea.Selection.RealEnd.Y;
			
			if (!executor.TextArea.Selection.HasSomethingSelected)
				y1 = y2 = executor.TextArea.Caret.CaretPos.Y;
			
			if (y2 - y1 > 0) {
				if (executor.TextArea.Selection.SelectionEnd.X == 0 && executor.TextArea.Selection.SelectionEnd.Y == y2)
					--y2;
				if (executor.TextArea.Selection.SelectionStart.X == 0 && executor.TextArea.Selection.SelectionStart.Y == y2)
					--y2;
			}
			
			for (int i = y1; i <= y2; ++i) {
				if (executor.TextArea.Buffer[i].Text.Length > 1 && executor.TextArea.Buffer[i].Text[0] == '/' && executor.TextArea.Buffer[i].Text[1] == '/')
					executor.TextArea.Buffer.Delete(new Point(0, i), new Point(2, i));
				else
					executor.TextArea.Buffer.Insert(new Point(0, i), "//");
			}
			executor.TextArea.UpdateLines(y1, y2);
		}
	}
	
	public class MovePageDown : ISdEditAction
	{
		public virtual void Execute(ISdEditActionExecutor executor)
		{
			Point pos = executor.TextArea.Caret.CaretPos;
			if (pos.Y < executor.TextArea.Buffer.Length - executor.TextArea.lastVisibleLine) {
				pos.Y = executor.TextArea.Caret.GetFirstValidPosGreater(pos.Y + executor.TextArea.lastVisibleLine);
				pos.X = executor.TextArea.Caret.UpDownPos;
				executor.TextArea.Caret.CaretPos = pos;
				
			}else{
				pos.Y = executor.TextArea.Caret.GetFirstValidPosLower(executor.TextArea.Buffer.Length);
				pos.X = executor.TextArea.Caret.UpDownPos;
				executor.TextArea.Caret.CaretPos = pos;
				
			} 
		}
	}
	
	public class MovePageUp : ISdEditAction
	{
		public virtual void Execute(ISdEditActionExecutor executor)
		{
			Point pos = executor.TextArea.Caret.CaretPos;
			if (pos.Y > executor.TextArea.lastVisibleLine){
				pos.Y = executor.TextArea.Caret.GetFirstValidPosLower(pos.Y - executor.TextArea.lastVisibleLine);
				pos.X = executor.TextArea.Caret.UpDownPos;
				executor.TextArea.Caret.CaretPos = pos;
				
			} else {
				pos.Y = executor.TextArea.Caret.GetFirstValidPosGreater(-1);
				executor.TextArea.Caret.CaretPos = pos;
			}
		}
	}
	
	public class ShiftMovePageUp : MovePageUp
	{
		public override void Execute(ISdEditActionExecutor executor)
		{
			Point oldpos = executor.TextArea.Caret.CaretPos;
			executor.TextArea.ClearSelectionMove = false;
			base.Execute(executor);
			executor.TextArea.ClearSelectionMove = true;
			executor.TextArea.Selection.SetSelectionEnd(oldpos, executor.TextArea.Caret.CaretPos);
		}
	}
	
	public class ShiftMovePageDown : MovePageDown
	{
		public override void Execute(ISdEditActionExecutor executor)
		{
			Point oldpos = executor.TextArea.Caret.CaretPos;
			executor.TextArea.ClearSelectionMove = false;
			base.Execute(executor);
			executor.TextArea.ClearSelectionMove = true;
			executor.TextArea.Selection.SetSelectionEnd(oldpos, executor.TextArea.Caret.CaretPos);
		}
	}
	
	public class TemplateCompletion : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			if (executor.TextArea.Buffer.ReadOnly) 
				return;
			
			Point dpos = new Point(0, 0); // TODO : Correct Position
			dpos.X = (int)(executor.TextArea.Caret.CaretPos.X * executor.TextArea.TextAreaPainter.FontWidth);
			dpos.Y = (int)(executor.TextArea.Caret.CaretPos.Y * executor.TextArea.TextAreaPainter.FontHeight);
			dpos.Y += 120;
			
	//		dpos.X += window.main.DesktopLocation.X;
	//		dpos.Y += window.main.DesktopLocation.X;
			
//			dpos.X += executor.TextArea.DesktopLocation.X;
//			dpos.Y += executor.TextArea.DesktopLocation.Y;
			
			string word = executor.TextArea.GetWordBeforeCaret();
			
			TemplateCompletionWindow scw = new TemplateCompletionWindow(word, dpos);
			if (scw.Value != null) {
				executor.TextArea.InsertTemplate(scw.Value);
			}
		}
	}
	
	public class Undo : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			if (executor.TextArea.Buffer.ReadOnly) 
				return;
			
			executor.TextArea.Selection.SetNoSelection(); // JC: Is this correct, it actually ought to 
//			                                            // undo selection if the selection was the last action ?
			executor.TextArea.Caret.CheckCaretPos();
		}
	}
	
	public class Fold : ISdEditAction
	{
		
		
		public void Execute(ISdEditActionExecutor executor)
		{
			executor.TextArea.Buffer.Foldings.FoldPos(executor.TextArea.Caret.CaretPos);
			executor.TextArea.Refresh();
		}
	}
	
	public class UnFold : ISdEditAction
	{
		public void Execute(ISdEditActionExecutor executor)
		{
			executor.TextArea.Buffer.Foldings.UnFold(executor.TextArea.Caret.CaretPos.Y + 1);
			executor.TextArea.Refresh();
		}
	}
	
}