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464 lines
16 KiB
464 lines
16 KiB
// <file> |
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// <copyright see="prj:///doc/copyright.txt"/> |
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// <license see="prj:///doc/license.txt"/> |
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// <owner name="Mike Krüger" email="mike@icsharpcode.net"/> |
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// <version>$Revision$</version> |
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// </file> |
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using System; |
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using System.Collections.Generic; |
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using System.Drawing; |
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using System.Text; |
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using System.Windows.Forms; |
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using ICSharpCode.TextEditor.Document; |
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namespace ICSharpCode.TextEditor |
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{ |
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/// <summary> |
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/// This class handles all mouse stuff for a textArea. |
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/// </summary> |
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public class TextAreaMouseHandler |
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{ |
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TextArea textArea; |
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bool doubleclick = false; |
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int selbegin; |
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int selend; |
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bool clickedOnSelectedText = false; |
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MouseButtons button; |
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static readonly Point nilPoint = new Point(-1, -1); |
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Point mousedownpos = nilPoint; |
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Point lastmousedownpos = nilPoint; |
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bool gotmousedown = false; |
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bool dodragdrop = false; |
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public TextAreaMouseHandler(TextArea ttextArea) |
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{ |
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textArea = ttextArea; |
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} |
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public void Attach() |
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{ |
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textArea.Click += new EventHandler(TextAreaClick); |
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textArea.MouseMove += new MouseEventHandler(TextAreaMouseMove); |
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textArea.MouseDown += new MouseEventHandler(OnMouseDown); |
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textArea.DoubleClick += new EventHandler(OnDoubleClick); |
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textArea.MouseLeave += new EventHandler(OnMouseLeave); |
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textArea.MouseUp += new MouseEventHandler(OnMouseUp); |
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textArea.LostFocus += new EventHandler(TextAreaLostFocus); |
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textArea.ToolTipRequest += new ToolTipRequestEventHandler(OnToolTipRequest); |
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} |
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void OnToolTipRequest(object sender, ToolTipRequestEventArgs e) |
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{ |
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if (e.ToolTipShown) |
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return; |
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Point mousepos = e.MousePosition; |
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FoldMarker marker = textArea.TextView.GetFoldMarkerFromPosition(mousepos.X - textArea.TextView.DrawingPosition.X, |
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mousepos.Y - textArea.TextView.DrawingPosition.Y); |
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if (marker != null && marker.IsFolded) { |
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StringBuilder sb = new StringBuilder(marker.InnerText); |
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// max 10 lines |
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int endLines = 0; |
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for (int i = 0; i < sb.Length; ++i) { |
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if (sb[i] == '\n') { |
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++endLines; |
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if (endLines >= 10) { |
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sb.Remove(i + 1, sb.Length - i - 1); |
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sb.Append(Environment.NewLine); |
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sb.Append("..."); |
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break; |
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} |
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} |
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} |
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sb.Replace("\t", " "); |
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e.ShowToolTip(sb.ToString()); |
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return; |
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} |
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List<TextMarker> markers = textArea.Document.MarkerStrategy.GetMarkers(e.LogicalPosition); |
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foreach (TextMarker tm in markers) { |
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if (tm.ToolTip != null) { |
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e.ShowToolTip(tm.ToolTip.Replace("\t", " ")); |
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return; |
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} |
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} |
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} |
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void ShowHiddenCursorIfMovedOrLeft() |
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{ |
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textArea.ShowHiddenCursor(!textArea.Focused || |
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!textArea.ClientRectangle.Contains(textArea.PointToClient(Cursor.Position))); |
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} |
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void TextAreaLostFocus(object sender, EventArgs e) |
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{ |
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// The call to ShowHiddenCursorIfMovedOrLeft is delayed |
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// until pending messages have been processed |
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// so that it can properly detect whether the TextArea |
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// has really lost focus. |
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// For example, the CodeCompletionWindow gets focus when it is shown, |
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// but immediately gives back focus to the TextArea. |
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textArea.BeginInvoke(new MethodInvoker(ShowHiddenCursorIfMovedOrLeft)); |
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} |
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void OnMouseLeave(object sender, EventArgs e) |
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{ |
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ShowHiddenCursorIfMovedOrLeft(); |
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gotmousedown = false; |
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mousedownpos = nilPoint; |
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} |
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void OnMouseUp(object sender, MouseEventArgs e) |
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{ |
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textArea.SelectionManager.selectFrom.where = WhereFrom.None; |
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gotmousedown = false; |
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mousedownpos = nilPoint; |
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} |
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void TextAreaClick(object sender, EventArgs e) |
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{ |
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Point mousepos; |
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mousepos = textArea.mousepos; |
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if (dodragdrop) |
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{ |
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return; |
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} |
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if (clickedOnSelectedText && textArea.TextView.DrawingPosition.Contains(mousepos.X, mousepos.Y)) |
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{ |
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textArea.SelectionManager.ClearSelection(); |
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Point clickPosition = textArea.TextView.GetLogicalPosition(mousepos.X - textArea.TextView.DrawingPosition.X, |
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mousepos.Y - textArea.TextView.DrawingPosition.Y); |
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textArea.Caret.Position = clickPosition; |
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textArea.SetDesiredColumn(); |
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} |
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} |
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void TextAreaMouseMove(object sender, MouseEventArgs e) |
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{ |
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Point mousepos = textArea.mousepos; |
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// honour the starting selection strategy |
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switch (textArea.SelectionManager.selectFrom.where) |
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{ |
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case WhereFrom.Gutter: |
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//moveGutter(sender, e); |
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ExtendSelectionToMouse(); |
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break; |
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case WhereFrom.TArea: |
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break; |
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} |
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textArea.ShowHiddenCursor(false); |
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if (dodragdrop) { |
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dodragdrop = false; |
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return; |
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} |
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doubleclick = false; |
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textArea.mousepos = new Point(e.X, e.Y); |
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if (clickedOnSelectedText) { |
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if (Math.Abs(mousedownpos.X - mousepos.X) >= SystemInformation.DragSize.Width / 2 || |
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Math.Abs(mousedownpos.Y - mousepos.Y) >= SystemInformation.DragSize.Height / 2) |
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{ |
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clickedOnSelectedText = false; |
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ISelection selection = textArea.SelectionManager.GetSelectionAt(textArea.Caret.Offset); |
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if (selection != null) { |
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string text = selection.SelectedText; |
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if (text != null && text.Length > 0) { |
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DataObject dataObject = new DataObject (); |
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dataObject.SetData(DataFormats.UnicodeText, true, text); |
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dataObject.SetData(selection); |
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dodragdrop = true; |
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textArea.DoDragDrop(dataObject, DragDropEffects.All); |
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} |
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} |
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} |
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return; |
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} |
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if (e.Button == MouseButtons.Left) { |
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if (gotmousedown && textArea.SelectionManager.selectFrom.where == WhereFrom.TArea) |
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{ |
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ExtendSelectionToMouse(); |
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} |
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} |
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} |
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void ExtendSelectionToMouse() |
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{ |
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Point mousepos; |
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mousepos = textArea.mousepos; |
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Point realmousepos = textArea.TextView.GetLogicalPosition(Math.Max(0, mousepos.X - textArea.TextView.DrawingPosition.X), |
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mousepos.Y - textArea.TextView.DrawingPosition.Y); |
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int y = realmousepos.Y; |
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realmousepos = textArea.Caret.ValidatePosition(realmousepos); |
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Point oldPos = textArea.Caret.Position; |
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if (oldPos == realmousepos && textArea.SelectionManager.selectFrom.where != WhereFrom.Gutter) |
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{ |
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return; |
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} |
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if (textArea.SelectionManager.selectFrom.where == WhereFrom.Gutter) |
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if(realmousepos.Y < textArea.SelectionManager.selectionStart.Y) { |
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// the selection is from the gutter and it has moved above the startpoint |
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textArea.Caret.Position = new Point(0, realmousepos.Y); |
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} else { |
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if(realmousepos.Y == textArea.SelectionManager.selectionStart.Y) { |
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textArea.Caret.Position = textArea.SelectionManager.NextValidPosition(realmousepos.Y); |
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} else { |
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textArea.Caret.Position = textArea.SelectionManager.NextValidPosition(realmousepos.Y); |
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} |
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} |
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else |
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textArea.Caret.Position = realmousepos; |
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if (minSelection != nilPoint && textArea.SelectionManager.SelectionCollection.Count > 0) { |
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// Extend selection when selection was started with double-click |
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ISelection selection = textArea.SelectionManager.SelectionCollection[0]; |
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Point min = textArea.SelectionManager.GreaterEqPos(minSelection, maxSelection) ? maxSelection : minSelection; |
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Point max = textArea.SelectionManager.GreaterEqPos(minSelection, maxSelection) ? minSelection : maxSelection; |
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if (textArea.SelectionManager.GreaterEqPos(max, realmousepos) && textArea.SelectionManager.GreaterEqPos(realmousepos, min)) { |
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textArea.SelectionManager.SetSelection(min, max); |
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} else if (textArea.SelectionManager.GreaterEqPos(max, realmousepos)) { |
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//textArea.SelectionManager.SetSelection(realmousepos, max); |
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int moff = textArea.Document.PositionToOffset(realmousepos); |
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min = textArea.Document.OffsetToPosition(FindWordStart(textArea.Document, moff)); |
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textArea.SelectionManager.SetSelection(min, max); |
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} else { |
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//textArea.SelectionManager.SetSelection(min, realmousepos); |
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int moff = textArea.Document.PositionToOffset(realmousepos); |
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max = textArea.Document.OffsetToPosition(FindWordEnd(textArea.Document, moff)); |
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textArea.SelectionManager.SetSelection(min, max); |
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} |
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} else { |
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textArea.SelectionManager.ExtendSelection(oldPos, textArea.Caret.Position); |
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} |
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textArea.SetDesiredColumn(); |
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} |
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void DoubleClickSelectionExtend() |
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{ |
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Point mousepos; |
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mousepos = textArea.mousepos; |
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textArea.SelectionManager.ClearSelection(); |
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if (textArea.TextView.DrawingPosition.Contains(mousepos.X, mousepos.Y)) |
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{ |
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FoldMarker marker = textArea.TextView.GetFoldMarkerFromPosition(mousepos.X - textArea.TextView.DrawingPosition.X, |
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mousepos.Y - textArea.TextView.DrawingPosition.Y); |
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if (marker != null && marker.IsFolded) { |
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marker.IsFolded = false; |
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textArea.MotherTextAreaControl.AdjustScrollBars(); |
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} |
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if (textArea.Caret.Offset < textArea.Document.TextLength) { |
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switch (textArea.Document.GetCharAt(textArea.Caret.Offset)) { |
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case '"': |
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if (textArea.Caret.Offset < textArea.Document.TextLength) { |
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int next = FindNext(textArea.Document, textArea.Caret.Offset + 1, '"'); |
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minSelection = textArea.Caret.Position; |
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if (next > textArea.Caret.Offset && next < textArea.Document.TextLength) |
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next += 1; |
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maxSelection = textArea.Document.OffsetToPosition(next); |
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} |
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break; |
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default: |
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minSelection = textArea.Document.OffsetToPosition(FindWordStart(textArea.Document, textArea.Caret.Offset)); |
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maxSelection = textArea.Document.OffsetToPosition(FindWordEnd(textArea.Document, textArea.Caret.Offset)); |
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break; |
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} |
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textArea.SelectionManager.ExtendSelection(minSelection, maxSelection); |
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} |
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// HACK WARNING !!! |
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// must refresh here, because when a error tooltip is showed and the underlined |
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// code is double clicked the textArea don't update corrctly, updateline doesn't |
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// work ... but the refresh does. |
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// Mike |
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textArea.Refresh(); |
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} |
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} |
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DateTime lastTime = DateTime.Now; |
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void OnMouseDown(object sender, MouseEventArgs e) |
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{ |
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Point mousepos; |
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mousepos = textArea.mousepos; |
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if (dodragdrop) |
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{ |
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return; |
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} |
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if (doubleclick) { |
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doubleclick = false; |
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return; |
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} |
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if (textArea.TextView.DrawingPosition.Contains(mousepos.X, mousepos.Y)) { |
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gotmousedown = true; |
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textArea.SelectionManager.selectFrom.where = WhereFrom.TArea; |
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button = e.Button; |
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if (button == MouseButtons.Left && (DateTime.Now - lastTime).Milliseconds < SystemInformation.DoubleClickTime) { |
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int deltaX = Math.Abs(lastmousedownpos.X - e.X); |
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int deltaY = Math.Abs(lastmousedownpos.Y - e.Y); |
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if (deltaX <= SystemInformation.DoubleClickSize.Width && |
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deltaY <= SystemInformation.DoubleClickSize.Height) { |
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DoubleClickSelectionExtend(); |
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lastTime = DateTime.Now; |
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lastmousedownpos = new Point(e.X, e.Y); |
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return; |
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} |
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} |
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minSelection = nilPoint; |
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maxSelection = nilPoint; |
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lastTime = DateTime.Now; |
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lastmousedownpos = mousedownpos = new Point(e.X, e.Y); |
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if (button == MouseButtons.Left) { |
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FoldMarker marker = textArea.TextView.GetFoldMarkerFromPosition(mousepos.X - textArea.TextView.DrawingPosition.X, |
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mousepos.Y - textArea.TextView.DrawingPosition.Y); |
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if (marker != null && marker.IsFolded) { |
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if (textArea.SelectionManager.HasSomethingSelected) { |
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clickedOnSelectedText = true; |
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} |
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textArea.SelectionManager.SetSelection(new DefaultSelection(textArea.TextView.Document, new Point(marker.StartColumn, marker.StartLine), new Point(marker.EndColumn, marker.EndLine))); |
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textArea.Focus(); |
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return; |
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} |
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if ((Control.ModifierKeys & Keys.Shift) == Keys.Shift) { |
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ExtendSelectionToMouse(); |
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} else { |
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Point realmousepos = textArea.TextView.GetLogicalPosition(mousepos.X - textArea.TextView.DrawingPosition.X, mousepos.Y - textArea.TextView.DrawingPosition.Y); |
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clickedOnSelectedText = false; |
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int offset = textArea.Document.PositionToOffset(realmousepos); |
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if (textArea.SelectionManager.HasSomethingSelected && |
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textArea.SelectionManager.IsSelected(offset)) { |
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clickedOnSelectedText = true; |
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} else { |
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selbegin = selend = offset; |
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textArea.SelectionManager.ClearSelection(); |
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if (mousepos.Y > 0 && mousepos.Y < textArea.TextView.DrawingPosition.Height) { |
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Point pos = new Point(); |
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pos.Y = Math.Min(textArea.Document.TotalNumberOfLines - 1, realmousepos.Y); |
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pos.X = realmousepos.X; |
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textArea.Caret.Position = pos;//Math.Max(0, Math.Min(textArea.Document.TextLength, line.Offset + Math.Min(line.Length, pos.X))); |
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textArea.SetDesiredColumn(); |
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} |
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} |
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} |
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} else if (button == MouseButtons.Right) { |
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// Rightclick sets the cursor to the click position unless |
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// the previous selection was clicked |
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Point realmousepos = textArea.TextView.GetLogicalPosition(mousepos.X - textArea.TextView.DrawingPosition.X, mousepos.Y - textArea.TextView.DrawingPosition.Y); |
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int offset = textArea.Document.PositionToOffset(realmousepos); |
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if (!textArea.SelectionManager.HasSomethingSelected || |
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!textArea.SelectionManager.IsSelected(offset)) |
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{ |
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selbegin = selend = offset; |
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textArea.SelectionManager.ClearSelection(); |
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if (mousepos.Y > 0 && mousepos.Y < textArea.TextView.DrawingPosition.Height) { |
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Point pos = new Point(); |
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pos.Y = Math.Min(textArea.Document.TotalNumberOfLines - 1, realmousepos.Y); |
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pos.X = realmousepos.X; |
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textArea.Caret.Position = pos;//Math.Max(0, Math.Min(textArea.Document.TextLength, line.Offset + Math.Min(line.Length, pos.X))); |
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textArea.SetDesiredColumn(); |
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} |
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} |
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} |
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} |
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textArea.Focus(); |
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} |
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int FindNext(IDocument document, int offset, char ch) |
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{ |
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LineSegment line = document.GetLineSegmentForOffset(offset); |
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int endPos = line.Offset + line.Length; |
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while (offset < endPos && document.GetCharAt(offset) != ch) { |
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++offset; |
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} |
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return offset; |
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} |
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bool IsSelectableChar(char ch) |
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{ |
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return Char.IsLetterOrDigit(ch) || ch=='_'; |
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} |
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int FindWordStart(IDocument document, int offset) |
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{ |
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LineSegment line = document.GetLineSegmentForOffset(offset); |
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if (offset > 0 && Char.IsWhiteSpace(document.GetCharAt(offset - 1)) && Char.IsWhiteSpace(document.GetCharAt(offset))) { |
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while (offset > line.Offset && Char.IsWhiteSpace(document.GetCharAt(offset - 1))) { |
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--offset; |
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} |
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} else if (IsSelectableChar(document.GetCharAt(offset)) || (offset > 0 && Char.IsWhiteSpace(document.GetCharAt(offset)) && IsSelectableChar(document.GetCharAt(offset - 1)))) { |
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while (offset > line.Offset && IsSelectableChar(document.GetCharAt(offset - 1))) { |
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--offset; |
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} |
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} else { |
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if (offset > 0 && !Char.IsWhiteSpace(document.GetCharAt(offset - 1)) && !IsSelectableChar(document.GetCharAt(offset - 1)) ) { |
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return Math.Max(0, offset - 1); |
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} |
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} |
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return offset; |
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} |
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int FindWordEnd(IDocument document, int offset) |
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{ |
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LineSegment line = document.GetLineSegmentForOffset(offset); |
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int endPos = line.Offset + line.Length; |
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offset = Math.Min(offset, endPos - 1); |
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if (IsSelectableChar(document.GetCharAt(offset))) { |
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while (offset < endPos && IsSelectableChar(document.GetCharAt(offset))) { |
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++offset; |
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} |
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} else if (Char.IsWhiteSpace(document.GetCharAt(offset))) { |
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if (offset > 0 && Char.IsWhiteSpace(document.GetCharAt(offset - 1))) { |
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while (offset < endPos && Char.IsWhiteSpace(document.GetCharAt(offset))) { |
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++offset; |
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} |
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} |
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} else { |
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return Math.Max(0, offset + 1); |
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} |
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return offset; |
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} |
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Point minSelection = nilPoint; |
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Point maxSelection = nilPoint; |
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void OnDoubleClick(object sender, System.EventArgs e) |
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{ |
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if (dodragdrop) { |
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return; |
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} |
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doubleclick = true; |
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} |
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} |
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}
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