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Add IsUndoEnabled to TextBox

pull/6023/head
Deadpikle 5 years ago
parent
467c661c70
commit
6763337e25
1 changed files with 62 additions and 25 deletions
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  1. 87
      src/Avalonia.Controls/TextBox.cs

87
src/Avalonia.Controls/TextBox.cs
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@ -119,9 +119,9 @@ namespace Avalonia.Controls
AvaloniaProperty.Register<TextBox, bool>(nameof(RevealPassword));
public static readonly DirectProperty<TextBox, bool> CanCutProperty =
AvaloniaProperty.RegisterDirect<TextBox, bool>(
nameof(CanCut),
o => o.CanCut);
AvaloniaProperty.RegisterDirect<TextBox, bool>(
nameof(CanCut),
o => o.CanCut);
public static readonly DirectProperty<TextBox, bool> CanCopyProperty =
AvaloniaProperty.RegisterDirect<TextBox, bool>(
@ -129,9 +129,14 @@ namespace Avalonia.Controls
o => o.CanCopy);
public static readonly DirectProperty<TextBox, bool> CanPasteProperty =
AvaloniaProperty.RegisterDirect<TextBox, bool>(
nameof(CanPaste),
o => o.CanPaste);
AvaloniaProperty.RegisterDirect<TextBox, bool>(
nameof(CanPaste),
o => o.CanPaste);
public static readonly StyledProperty<bool> IsUndoEnabledProperty =
AvaloniaProperty.Register<TextBox, bool>(
nameof(IsUndoEnabled),
defaultValue: true);
struct UndoRedoState : IEquatable<UndoRedoState>
{
@ -218,7 +223,7 @@ namespace Avalonia.Controls
value = CoerceCaretIndex(value);
SetAndRaise(CaretIndexProperty, ref _caretIndex, value);
UndoRedoState state;
if (_undoRedoHelper.TryGetLastState(out state) && state.Text == Text)
if (IsUndoEnabled && _undoRedoHelper.TryGetLastState(out state) && state.Text == Text)
_undoRedoHelper.UpdateLastState();
}
}
@ -316,7 +321,7 @@ namespace Avalonia.Controls
SelectionEnd = CoerceCaretIndex(SelectionEnd, value);
CaretIndex = CoerceCaretIndex(caretIndex, value);
if (SetAndRaise(TextProperty, ref _text, value) && !_isUndoingRedoing)
if (SetAndRaise(TextProperty, ref _text, value) && IsUndoEnabled && !_isUndoingRedoing)
{
_undoRedoHelper.Clear();
}
@ -329,7 +334,7 @@ namespace Avalonia.Controls
get { return GetSelection(); }
set
{
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
if (string.IsNullOrEmpty(value))
{
DeleteSelection();
@ -338,7 +343,7 @@ namespace Avalonia.Controls
{
HandleTextInput(value);
}
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
}
}
@ -446,6 +451,27 @@ namespace Avalonia.Controls
private set { SetAndRaise(CanPasteProperty, ref _canPaste, value); }
}
/// <summary>
/// Property for determining whether undo/redo is enabled
/// </summary>
public bool IsUndoEnabled
{
get { return GetValue(IsUndoEnabledProperty); }
set
{
SetValue(IsUndoEnabledProperty, value);
if (value == false)
{
// from docs at
// https://docs.microsoft.com/en-us/dotnet/api/system.windows.controls.primitives.textboxbase.isundoenabled:
// "Setting this property to false clears the undo stack.
// Therefore, if you disable undo and then re-enable it, undo commands still do not work
// because the undo stack was emptied when you disabled undo."
_undoRedoHelper.Clear();
}
}
}
protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
{
_presenter = e.NameScope.Get<TextPresenter>("PART_TextPresenter");
@ -551,7 +577,10 @@ namespace Avalonia.Controls
SetTextInternal(text.Substring(0, caretIndex) + input + text.Substring(caretIndex));
CaretIndex += input.Length;
ClearSelection();
_undoRedoHelper.DiscardRedo();
if (IsUndoEnabled)
{
_undoRedoHelper.DiscardRedo();
}
}
}
@ -570,10 +599,10 @@ namespace Avalonia.Controls
var text = GetSelection();
if (text is null) return;
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
Copy();
DeleteSelection();
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
}
public async void Copy()
@ -591,9 +620,9 @@ namespace Avalonia.Controls
if (text is null) return;
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
HandleTextInput(text);
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
}
protected override void OnKeyDown(KeyEventArgs e)
@ -638,7 +667,7 @@ namespace Avalonia.Controls
Paste();
handled = true;
}
else if (Match(keymap.Undo))
else if (Match(keymap.Undo) && IsUndoEnabled)
{
try
{
@ -652,7 +681,7 @@ namespace Avalonia.Controls
handled = true;
}
else if (Match(keymap.Redo))
else if (Match(keymap.Redo) && IsUndoEnabled)
{
try
{
@ -752,7 +781,7 @@ namespace Avalonia.Controls
break;
case Key.Back:
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
if (hasWholeWordModifiers && SelectionStart == SelectionEnd)
{
SetSelectionForControlBackspace();
@ -776,13 +805,13 @@ namespace Avalonia.Controls
CaretIndex -= removedCharacters;
ClearSelection();
}
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
handled = true;
break;
case Key.Delete:
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
if (hasWholeWordModifiers && SelectionStart == SelectionEnd)
{
SetSelectionForControlDelete();
@ -804,7 +833,7 @@ namespace Avalonia.Controls
SetTextInternal(text.Substring(0, caretIndex) +
text.Substring(caretIndex + removedCharacters));
}
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
handled = true;
break;
@ -812,9 +841,9 @@ namespace Avalonia.Controls
case Key.Enter:
if (AcceptsReturn)
{
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
HandleTextInput(NewLine);
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
handled = true;
}
@ -823,9 +852,9 @@ namespace Avalonia.Controls
case Key.Tab:
if (AcceptsTab)
{
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
HandleTextInput("\t");
_undoRedoHelper.Snapshot();
SnapshotUndoRedo();
handled = true;
}
else
@ -1251,5 +1280,13 @@ namespace Avalonia.Controls
ClearSelection();
}
}
private void SnapshotUndoRedo()
{
if (IsUndoEnabled)
{
_undoRedoHelper.Snapshot();
}
}
}
}

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