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203
ICSharpCode.TextEditor/Project/Src/Actions/CaretActions.cs
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203
ICSharpCode.TextEditor/Project/Src/Actions/CaretActions.cs
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// <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 ICSharpCode.TextEditor.Document;
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namespace ICSharpCode.TextEditor.Actions
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{
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public class CaretLeft : AbstractEditAction
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{
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public override void Execute(TextArea textArea)
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{
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TextLocation position = textArea.Caret.Position;
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List<FoldMarker> foldings = textArea.Document.FoldingManager.GetFoldedFoldingsWithEnd(position.Y);
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FoldMarker justBeforeCaret = null;
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foreach (FoldMarker fm in foldings) {
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if (fm.EndColumn == position.X) {
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justBeforeCaret = fm;
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break; // the first folding found is the folding with the smallest Startposition
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}
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}
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if (justBeforeCaret != null) {
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position.Y = justBeforeCaret.StartLine;
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position.X = justBeforeCaret.StartColumn;
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} else {
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if (position.X > 0) {
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--position.X;
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} else if (position.Y > 0) {
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LineSegment lineAbove = textArea.Document.GetLineSegment(position.Y - 1);
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position = new TextLocation(lineAbove.Length, position.Y - 1);
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}
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}
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textArea.Caret.Position = position;
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textArea.SetDesiredColumn();
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}
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}
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public class CaretRight : AbstractEditAction
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{
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public override void Execute(TextArea textArea)
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{
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LineSegment curLine = textArea.Document.GetLineSegment(textArea.Caret.Line);
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TextLocation position = textArea.Caret.Position;
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List<FoldMarker> foldings = textArea.Document.FoldingManager.GetFoldedFoldingsWithStart(position.Y);
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FoldMarker justBehindCaret = null;
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foreach (FoldMarker fm in foldings) {
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if (fm.StartColumn == position.X) {
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justBehindCaret = fm;
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break;
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}
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}
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if (justBehindCaret != null) {
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position.Y = justBehindCaret.EndLine;
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position.X = justBehindCaret.EndColumn;
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} else { // no folding is interesting
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if (position.X < curLine.Length || textArea.TextEditorProperties.AllowCaretBeyondEOL) {
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++position.X;
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} else if (position.Y + 1 < textArea.Document.TotalNumberOfLines) {
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++position.Y;
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position.X = 0;
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}
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}
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textArea.Caret.Position = position;
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textArea.SetDesiredColumn();
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}
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}
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public class CaretUp : AbstractEditAction
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{
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public override void Execute(TextArea textArea)
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{
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TextLocation position = textArea.Caret.Position;
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int lineNr = position.Y;
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int visualLine = textArea.Document.GetVisibleLine(lineNr);
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if (visualLine > 0) {
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Point pos = new Point(textArea.TextView.GetDrawingXPos(lineNr, position.X),
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textArea.TextView.DrawingPosition.Y + (visualLine - 1) * textArea.TextView.FontHeight - textArea.TextView.TextArea.VirtualTop.Y);
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textArea.Caret.Position = textArea.TextView.GetLogicalPosition(pos);
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textArea.SetCaretToDesiredColumn();
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}
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// if (textArea.Caret.Line > 0) {
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// textArea.SetCaretToDesiredColumn(textArea.Caret.Line - 1);
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// }
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}
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}
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public class CaretDown : AbstractEditAction
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{
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public override void Execute(TextArea textArea)
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{
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TextLocation position = textArea.Caret.Position;
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int lineNr = position.Y;
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int visualLine = textArea.Document.GetVisibleLine(lineNr);
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if (visualLine < textArea.Document.GetVisibleLine(textArea.Document.TotalNumberOfLines)) {
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Point pos = new Point(textArea.TextView.GetDrawingXPos(lineNr, position.X),
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textArea.TextView.DrawingPosition.Y
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+ (visualLine + 1) * textArea.TextView.FontHeight
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- textArea.TextView.TextArea.VirtualTop.Y);
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textArea.Caret.Position = textArea.TextView.GetLogicalPosition(pos);
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textArea.SetCaretToDesiredColumn();
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}
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// if (textArea.Caret.Line + 1 < textArea.Document.TotalNumberOfLines) {
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// textArea.SetCaretToDesiredColumn(textArea.Caret.Line + 1);
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// }
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}
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}
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public class WordRight : CaretRight
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{
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public override void Execute(TextArea textArea)
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{
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LineSegment line = textArea.Document.GetLineSegment(textArea.Caret.Position.Y);
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TextLocation oldPos = textArea.Caret.Position;
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TextLocation newPos;
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if (textArea.Caret.Column >= line.Length) {
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newPos = new TextLocation(0, textArea.Caret.Line + 1);
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} else {
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int nextWordStart = TextUtilities.FindNextWordStart(textArea.Document, textArea.Caret.Offset);
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newPos = textArea.Document.OffsetToPosition(nextWordStart);
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}
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// handle fold markers
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List<FoldMarker> foldings = textArea.Document.FoldingManager.GetFoldingsFromPosition(newPos.Y, newPos.X);
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foreach (FoldMarker marker in foldings) {
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if (marker.IsFolded) {
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if (oldPos.X == marker.StartColumn && oldPos.Y == marker.StartLine) {
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newPos = new TextLocation(marker.EndColumn, marker.EndLine);
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} else {
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newPos = new TextLocation(marker.StartColumn, marker.StartLine);
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}
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break;
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}
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}
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textArea.Caret.Position = newPos;
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textArea.SetDesiredColumn();
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}
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}
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public class WordLeft : CaretLeft
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{
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public override void Execute(TextArea textArea)
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{
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TextLocation oldPos = textArea.Caret.Position;
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if (textArea.Caret.Column == 0) {
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base.Execute(textArea);
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} else {
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LineSegment line = textArea.Document.GetLineSegment(textArea.Caret.Position.Y);
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int prevWordStart = TextUtilities.FindPrevWordStart(textArea.Document, textArea.Caret.Offset);
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TextLocation newPos = textArea.Document.OffsetToPosition(prevWordStart);
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// handle fold markers
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List<FoldMarker> foldings = textArea.Document.FoldingManager.GetFoldingsFromPosition(newPos.Y, newPos.X);
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foreach (FoldMarker marker in foldings) {
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if (marker.IsFolded) {
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if (oldPos.X == marker.EndColumn && oldPos.Y == marker.EndLine) {
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newPos = new TextLocation(marker.StartColumn, marker.StartLine);
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} else {
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newPos = new TextLocation(marker.EndColumn, marker.EndLine);
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}
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break;
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}
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}
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textArea.Caret.Position = newPos;
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textArea.SetDesiredColumn();
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}
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}
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}
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public class ScrollLineUp : AbstractEditAction
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{
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public override void Execute(TextArea textArea)
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{
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textArea.AutoClearSelection = false;
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textArea.MotherTextAreaControl.VScrollBar.Value = Math.Max(textArea.MotherTextAreaControl.VScrollBar.Minimum,
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textArea.VirtualTop.Y - textArea.TextView.FontHeight);
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}
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}
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public class ScrollLineDown : AbstractEditAction
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{
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public override void Execute(TextArea textArea)
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{
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textArea.AutoClearSelection = false;
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textArea.MotherTextAreaControl.VScrollBar.Value = Math.Min(textArea.MotherTextAreaControl.VScrollBar.Maximum,
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textArea.VirtualTop.Y + textArea.TextView.FontHeight);
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}
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}
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}
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