Mono.TextEditor.TextViewMargin.MousePressed C# (CSharp) Method

		protected internal override void MousePressed (MarginMouseEventArgs args)
		{
			base.MousePressed (args);
			
			if (args.TriggersContextMenu ())
				return;
			
			InSelectionDrag = false;
			inDrag = false;
			Selection selection = textEditor.MainSelection;
			int oldOffset = textEditor.Caret.Offset;

			string link = GetLink != null ? GetLink (args) : null;
			if (!String.IsNullOrEmpty (link)) {
				textEditor.ClearSelection ();
				textEditor.FireLinkEvent (link, args.Button, args.ModifierState);
				return;
			}

			if (args.Button == 1) {
				if (!CalculateClickLocation (args.X, args.Y, out clickLocation))
					return;

				DocumentLine line = Document.GetLine (clickLocation.Line);
				bool isHandled = false;
				if (line != null) {
					foreach (TextLineMarker marker in line.Markers) {
						if (marker is IActionTextLineMarker) {
							isHandled |= ((IActionTextLineMarker)marker).MousePressed (textEditor, args);
							if (isHandled)
								break;
						}
					}
					var locNotSnapped = PointToLocation (args.X, args.Y, snapCharacters: false);
					foreach (var marker in Document.GetTextSegmentMarkersAt (Document.GetOffset (locNotSnapped)).Where (m => m.IsVisible)) {
						if (marker is IActionTextLineMarker) {
							isHandled |= ((IActionTextLineMarker)marker).MousePressed (textEditor, args);
							if (isHandled)
								break;
						}
					}
				}
				if (isHandled)
					return;

				int offset = Document.LocationToOffset (clickLocation);
				if (offset < 0) {
					textEditor.RunAction (CaretMoveActions.ToDocumentEnd);
					return;
				}
				if (args.Button == 2 && !selection.IsEmpty && selection.Contains (Document.OffsetToLocation (offset))) {
					textEditor.ClearSelection ();
					return;
				}

				if (args.Type == EventType.TwoButtonPress) {
					var data = textEditor.GetTextEditorData ();
					mouseWordStart = data.FindCurrentWordStart (offset);
					mouseWordEnd = data.FindCurrentWordEnd (offset);
					Caret.Offset = mouseWordEnd;
					textEditor.MainSelection = new Selection (textEditor.Document.OffsetToLocation (mouseWordStart), textEditor.Document.OffsetToLocation (mouseWordEnd));
					InSelectionDrag = true;
					mouseSelectionMode = MouseSelectionMode.Word;

					// folding marker
					int lineNr = args.LineNumber;
					foreach (var shownFolding in GetFoldRectangles (lineNr)) {
						if (shownFolding.Item1.Contains ((int)(args.X + this.XOffset), (int)args.Y)) {
							shownFolding.Item2.IsFolded = false;
							return;
						}
					}
					return;
				} else if (args.Type == EventType.ThreeButtonPress) {
					int lineNr = Document.OffsetToLineNumber (offset);
					textEditor.SetSelectLines (lineNr, lineNr);

					var range = textEditor.SelectionRange;
					mouseWordStart = range.Offset;
					mouseWordEnd = range.EndOffset;

					InSelectionDrag = true;
					mouseSelectionMode = MouseSelectionMode.WholeLine;
					return;
				}
				mouseSelectionMode = MouseSelectionMode.SingleChar;

				if (textEditor.IsSomethingSelected && IsInsideSelection (clickLocation) && clickLocation != textEditor.Caret.Location) {
					inDrag = true;
				} else {
					if ((args.ModifierState & Gdk.ModifierType.ShiftMask) == ModifierType.ShiftMask) {
						InSelectionDrag = true;
						Caret.PreserveSelection = true;
						if (!textEditor.IsSomethingSelected) {
							textEditor.MainSelection = new Selection (Caret.Location, clickLocation);
							Caret.Location = clickLocation;
						} else {
							Caret.Location = clickLocation;
							textEditor.ExtendSelectionTo (clickLocation);
						}
						Caret.PreserveSelection = false;
					} else {
						textEditor.ClearSelection ();
						Caret.Location = clickLocation;
						InSelectionDrag = true;
						textEditor.MainSelection = new Selection (clickLocation, clickLocation);
					}
					textEditor.RequestResetCaretBlink ();
				}
			}

			DocumentLocation docLocation = PointToLocation (args.X, args.Y, snapCharacters: true);
			if (docLocation.Line < DocumentLocation.MinLine || docLocation.Column < DocumentLocation.MinColumn)
				return;
			
			// disable middle click on windows.
			if (!Platform.IsWindows && args.Button == 2 && this.textEditor.CanEdit (docLocation.Line)) {
				TextSegment selectionRange = TextSegment.Invalid;
				int offset = Document.LocationToOffset (docLocation);
				if (!selection.IsEmpty)
					selectionRange = selection.GetSelectionRange (this.textEditor.GetTextEditorData ());
				var oldVersion = textEditor.Document.Version;

				bool autoScroll = textEditor.Caret.AutoScrollToCaret;
				textEditor.Caret.AutoScrollToCaret = false;
				if (!selection.IsEmpty && selectionRange.Contains (offset)) {
					textEditor.ClearSelection ();
					textEditor.Caret.Offset = selectionRange.EndOffset;
					return;
				}

				ClipboardActions.PasteFromPrimary (textEditor.GetTextEditorData (), offset);
				textEditor.Caret.Offset = oldOffset;
				if (!selectionRange.IsInvalid)
					textEditor.SelectionRange = new TextSegment (oldVersion.MoveOffsetTo (Document.Version, selectionRange.Offset), selectionRange.Length);

				if (autoScroll)
					textEditor.Caret.ActivateAutoScrollWithoutMove ();
			}
		}