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AvalonEdit
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Add TextArea.MouseSelectionMode property for starting/canceling mouse selection.

This commit is contained in:
Daniel Grunwald 2017-10-14 21:15:31 +02:00
Родитель e5913bbfa4
Коммит 11603da975
4 изменённых файлов: 140 добавлений и 66 удалений
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56
ICSharpCode.AvalonEdit/Editing/MouseSelectionMode.cs Normal file
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@ -0,0 +1,56 @@
// 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.
namespace ICSharpCode.AvalonEdit.Editing
{
/// <summary>
/// Enumeration of possible states of mouse selection.
/// </summary>
public enum MouseSelectionMode
{
/// <summary>
/// no selection (no mouse button down)
/// </summary>
None,
/// <summary>
/// left mouse button down on selection, might be normal click
/// or might be drag'n'drop
/// </summary>
PossibleDragStart,
/// <summary>
/// dragging text
/// </summary>
Drag,
/// <summary>
/// normal selection (click+drag)
/// </summary>
Normal,
/// <summary>
/// whole-word selection (double click+drag or ctrl+click+drag)
/// </summary>
WholeWord,
/// <summary>
/// whole-line selection (triple click+drag)
/// </summary>
WholeLine,
/// <summary>
/// rectangular selection (alt+click+drag)
/// </summary>
Rectangular
}
}

115
ICSharpCode.AvalonEdit/Editing/SelectionMouseHandler.cs
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@ -40,49 +40,14 @@ namespace ICSharpCode.AvalonEdit.Editing
/// </summary>
sealed class SelectionMouseHandler : ITextAreaInputHandler
{
#region enum SelectionMode
enum SelectionMode
{
/// <summary>
/// no selection (no mouse button down)
/// </summary>
None,
/// <summary>
/// left mouse button down on selection, might be normal click
/// or might be drag'n'drop
/// </summary>
PossibleDragStart,
/// <summary>
/// dragging text
/// </summary>
Drag,
/// <summary>
/// normal selection (click+drag)
/// </summary>
Normal,
/// <summary>
/// whole-word selection (double click+drag or ctrl+click+drag)
/// </summary>
WholeWord,
/// <summary>
/// whole-line selection (triple click+drag)
/// </summary>
WholeLine,
/// <summary>
/// rectangular selection (alt+click+drag)
/// </summary>
Rectangular
}
#endregion
readonly TextArea textArea;
SelectionMode mode;
MouseSelectionMode mode;
AnchorSegment startWord;
Point possibleDragStartMousePos;
#region Constructor + Attach + Detach
public SelectionMouseHandler(TextArea textArea)
internal SelectionMouseHandler(TextArea textArea)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
@ -101,15 +66,15 @@ namespace ICSharpCode.AvalonEdit.Editing
{
SelectionMouseHandler handler = textArea.DefaultInputHandler.MouseSelection as SelectionMouseHandler;
if (handler != null)
handler.mode = SelectionMode.None;
handler.mode = MouseSelectionMode.None;
}
}
public TextArea TextArea {
TextArea ITextAreaInputHandler.TextArea {
get { return textArea; }
}
public void Attach()
void ITextAreaInputHandler.Attach()
{
textArea.MouseLeftButtonDown += textArea_MouseLeftButtonDown;
textArea.MouseMove += textArea_MouseMove;
@ -123,9 +88,9 @@ namespace ICSharpCode.AvalonEdit.Editing
}
}
public void Detach()
void ITextAreaInputHandler.Detach()
{
mode = SelectionMode.None;
mode = MouseSelectionMode.None;
textArea.MouseLeftButtonDown -= textArea_MouseLeftButtonDown;
textArea.MouseMove -= textArea_MouseMove;
textArea.MouseLeftButtonUp -= textArea_MouseLeftButtonUp;
@ -239,7 +204,7 @@ namespace ICSharpCode.AvalonEdit.Editing
e.Effects = effect;
if (effect != DragDropEffects.None) {
int start = textArea.Caret.Offset;
if (mode == SelectionMode.Drag && textArea.Selection.Contains(start)) {
if (mode == MouseSelectionMode.Drag && textArea.Selection.Contains(start)) {
Debug.WriteLine("Drop: did not drop: drop target is inside selection");
e.Effects = DragDropEffects.None;
} else {
@ -324,7 +289,7 @@ namespace ICSharpCode.AvalonEdit.Editing
void StartDrag()
{
// prevent nested StartDrag calls
mode = SelectionMode.Drag;
mode = MouseSelectionMode.Drag;
// mouse capture and Drag'n'Drop doesn't mix
textArea.ReleaseMouseCapture();
@ -391,7 +356,7 @@ namespace ICSharpCode.AvalonEdit.Editing
void textArea_QueryCursor(object sender, QueryCursorEventArgs e)
{
if (!e.Handled) {
if (mode != SelectionMode.None) {
if (mode != MouseSelectionMode.None) {
// during selection, use IBeam cursor even outside the text area
e.Cursor = Cursors.IBeam;
e.Handled = true;
@ -418,7 +383,7 @@ namespace ICSharpCode.AvalonEdit.Editing
#region LeftButtonDown
void textArea_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
mode = SelectionMode.None;
mode = MouseSelectionMode.None;
if (!e.Handled && e.ChangedButton == MouseButton.Left) {
ModifierKeys modifiers = Keyboard.Modifiers;
bool shift = (modifiers & ModifierKeys.Shift) == ModifierKeys.Shift;
@ -428,7 +393,7 @@ namespace ICSharpCode.AvalonEdit.Editing
int offset = GetOffsetFromMousePosition(e, out visualColumn, out isAtEndOfLine);
if (textArea.Selection.Contains(offset)) {
if (textArea.CaptureMouse()) {
mode = SelectionMode.PossibleDragStart;
mode = MouseSelectionMode.PossibleDragStart;
possibleDragStartMousePos = e.GetPosition(textArea);
}
e.Handled = true;
@ -445,26 +410,26 @@ namespace ICSharpCode.AvalonEdit.Editing
}
if (textArea.CaptureMouse()) {
if ((modifiers & ModifierKeys.Alt) == ModifierKeys.Alt && textArea.Options.EnableRectangularSelection) {
mode = SelectionMode.Rectangular;
mode = MouseSelectionMode.Rectangular;
if (shift && textArea.Selection is RectangleSelection) {
textArea.Selection = textArea.Selection.StartSelectionOrSetEndpoint(oldPosition, textArea.Caret.Position);
}
} else if (e.ClickCount == 1 && ((modifiers & ModifierKeys.Control) == 0)) {
mode = SelectionMode.Normal;
mode = MouseSelectionMode.Normal;
if (shift && !(textArea.Selection is RectangleSelection)) {
textArea.Selection = textArea.Selection.StartSelectionOrSetEndpoint(oldPosition, textArea.Caret.Position);
}
} else {
SimpleSegment startWord;
if (e.ClickCount == 3) {
mode = SelectionMode.WholeLine;
mode = MouseSelectionMode.WholeLine;
startWord = GetLineAtMousePosition(e);
} else {
mode = SelectionMode.WholeWord;
mode = MouseSelectionMode.WholeWord;
startWord = GetWordAtMousePosition(e);
}
if (startWord == SimpleSegment.Invalid) {
mode = SelectionMode.None;
mode = MouseSelectionMode.None;
textArea.ReleaseMouseCapture();
return;
}
@ -484,6 +449,28 @@ namespace ICSharpCode.AvalonEdit.Editing
}
e.Handled = true;
}
public MouseSelectionMode MouseSelectionMode
{
get { return mode; }
set {
if (mode == value)
return;
if (value == MouseSelectionMode.None) {
mode = MouseSelectionMode.None;
textArea.ReleaseMouseCapture();
} else if (textArea.CaptureMouse()) {
switch (value) {
case MouseSelectionMode.Normal:
case MouseSelectionMode.Rectangular:
mode = value;
break;
default:
throw new NotImplementedException("Programmatically starting mouse selection is only supported for normal and rectangular selections.");
}
}
}
}
#endregion
#region Mouse Position <-> Text coordinates
@ -585,7 +572,7 @@ namespace ICSharpCode.AvalonEdit.Editing
{
if (e.Handled)
return;
if (mode == SelectionMode.Normal || mode == SelectionMode.WholeWord || mode == SelectionMode.WholeLine || mode == SelectionMode.Rectangular) {
if (mode == MouseSelectionMode.Normal || mode == MouseSelectionMode.WholeWord || mode == MouseSelectionMode.WholeLine || mode == MouseSelectionMode.Rectangular) {
e.Handled = true;
if (textArea.TextView.VisualLinesValid) {
// If the visual lines are not valid, don't extend the selection.
@ -593,7 +580,7 @@ namespace ICSharpCode.AvalonEdit.Editing
// to do that on MouseUp, we don't have to do it every MouseMove.
ExtendSelectionToMouse(e);
}
} else if (mode == SelectionMode.PossibleDragStart) {
} else if (mode == MouseSelectionMode.PossibleDragStart) {
e.Handled = true;
Vector mouseMovement = e.GetPosition(textArea) - possibleDragStartMousePos;
if (Math.Abs(mouseMovement.X) > SystemParameters.MinimumHorizontalDragDistance
@ -616,7 +603,7 @@ namespace ICSharpCode.AvalonEdit.Editing
int visualColumn;
bool isAtEndOfLine;
int offset;
if (mode == SelectionMode.Rectangular) {
if (mode == MouseSelectionMode.Rectangular) {
offset = GetOffsetFromMousePositionFirstTextLineOnly(e.GetPosition(textArea.TextView), out visualColumn);
isAtEndOfLine = true;
} else {
@ -634,16 +621,16 @@ namespace ICSharpCode.AvalonEdit.Editing
void ExtendSelectionToMouse(MouseEventArgs e)
{
TextViewPosition oldPosition = textArea.Caret.Position;
if (mode == SelectionMode.Normal || mode == SelectionMode.Rectangular) {
if (mode == MouseSelectionMode.Normal || mode == MouseSelectionMode.Rectangular) {
SetCaretOffsetToMousePosition(e);
if (mode == SelectionMode.Normal && textArea.Selection is RectangleSelection)
if (mode == MouseSelectionMode.Normal && textArea.Selection is RectangleSelection)
textArea.Selection = new SimpleSelection(textArea, oldPosition, textArea.Caret.Position);
else if (mode == SelectionMode.Rectangular && !(textArea.Selection is RectangleSelection))
else if (mode == MouseSelectionMode.Rectangular && !(textArea.Selection is RectangleSelection))
textArea.Selection = new RectangleSelection(textArea, oldPosition, textArea.Caret.Position);
else
textArea.Selection = textArea.Selection.StartSelectionOrSetEndpoint(oldPosition, textArea.Caret.Position);
} else if (mode == SelectionMode.WholeWord || mode == SelectionMode.WholeLine) {
var newWord = (mode == SelectionMode.WholeLine) ? GetLineAtMousePosition(e) : GetWordAtMousePosition(e);
} else if (mode == MouseSelectionMode.WholeWord || mode == MouseSelectionMode.WholeLine) {
var newWord = (mode == MouseSelectionMode.WholeLine) ? GetLineAtMousePosition(e) : GetWordAtMousePosition(e);
if (newWord != SimpleSegment.Invalid) {
textArea.Selection = Selection.Create(textArea,
Math.Min(newWord.Offset, startWord.Offset),
@ -662,17 +649,17 @@ namespace ICSharpCode.AvalonEdit.Editing
#region MouseLeftButtonUp
void textArea_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (mode == SelectionMode.None || e.Handled)
if (mode == MouseSelectionMode.None || e.Handled)
return;
e.Handled = true;
if (mode == SelectionMode.PossibleDragStart) {
if (mode == MouseSelectionMode.PossibleDragStart) {
// -> this was not a drag start (mouse didn't move after mousedown)
SetCaretOffsetToMousePosition(e);
textArea.ClearSelection();
} else if (mode == SelectionMode.Normal || mode == SelectionMode.WholeWord || mode == SelectionMode.WholeLine || mode == SelectionMode.Rectangular) {
} else if (mode == MouseSelectionMode.Normal || mode == MouseSelectionMode.WholeWord || mode == MouseSelectionMode.WholeLine || mode == MouseSelectionMode.Rectangular) {
ExtendSelectionToMouse(e);
}
mode = SelectionMode.None;
mode = MouseSelectionMode.None;
textArea.ReleaseMouseCapture();
}
#endregion

34
ICSharpCode.AvalonEdit/Editing/TextArea.cs
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@ -397,7 +397,6 @@ namespace ICSharpCode.AvalonEdit.Editing
/// <summary>
/// Gets/Sets the selection in this text area.
/// </summary>
public Selection Selection {
get { return selection; }
set {
@ -505,8 +504,39 @@ namespace ICSharpCode.AvalonEdit.Editing
get { return (double)GetValue(SelectionCornerRadiusProperty); }
set { SetValue(SelectionCornerRadiusProperty, value); }
}
/// <summary>
/// Gets/Sets the active mouse selection mode.
///
/// Setting this property to MouseSelectionMode.None will cancel mouse selection
/// and release mouse capture.
///
/// Setting this property to another value will acquire mouse capture and
/// activate the mouse selection mode.
/// If mouse capture cannot be acquired, MouseSelectionMode will stay unchanged.
///
/// Currently, the setter only supports the values <c>None</c>, <c>Normal</c>
/// and <c>Rectangular</c>.
/// </summary>
public MouseSelectionMode MouseSelectionMode
{
get {
var mouseHandler = DefaultInputHandler.MouseSelection as SelectionMouseHandler;
if (mouseHandler != null) {
return mouseHandler.MouseSelectionMode;
} else {
return MouseSelectionMode.None;
}
}
set {
var mouseHandler = DefaultInputHandler.MouseSelection as SelectionMouseHandler;
if (mouseHandler != null) {
mouseHandler.MouseSelectionMode = value;
}
}
}
#endregion
#region Force caret to stay inside selection
bool ensureSelectionValidRequested;
int allowCaretOutsideSelection;

1
ICSharpCode.AvalonEdit/ICSharpCode.AvalonEdit.csproj
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@ -176,6 +176,7 @@
<DependentUpon>Selection.cs</DependentUpon>
</Compile>
<Compile Include="Editing\ImeNativeWrapper.cs" />
<Compile Include="Editing\MouseSelectionMode.cs" />
<Compile Include="Editing\SelectionSegment.cs" />
<Compile Include="Editing\ImeSupport.cs" />
<Compile Include="Editing\TextAreaAutomationPeer.cs" />