/// <summary>
/// Creates a new SearchInputHandler and registers the search-related commands.
/// </summary>
public SearchInputHandler(TextArea textArea)
: base(textArea)
{
RegisterCommands(this.CommandBindings);
panel = new SearchPanel();
panel.Attach(TextArea);
}
/// <summary>
/// Creates a new SimpleSelection instance.
/// </summary>
internal SimpleSelection(TextArea textArea, TextViewPosition start, TextViewPosition end)
: base(textArea)
{
this.start = start;
this.end = end;
this.startOffset = textArea.Document.GetOffset(start.Location);
this.endOffset = textArea.Document.GetOffset(end.Location);
}
/// <summary>
/// Creates a new TextAreaInputHandler.
/// </summary>
public TextAreaInputHandler(TextArea textArea)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
this.textArea = textArea;
commandBindings = new ObserveAddRemoveCollection<CommandBinding>(CommandBinding_Added, CommandBinding_Removed);
inputBindings = new ObserveAddRemoveCollection<InputBinding>(InputBinding_Added, InputBinding_Removed);
nestedInputHandlers = new ObserveAddRemoveCollection<ITextAreaInputHandler>(NestedInputHandler_Added, NestedInputHandler_Removed);
}
public SelectionLayer(TextArea textArea)
: base(textArea.TextView, KnownLayer.Selection)
{
this.IsHitTestVisible = false;
this.textArea = textArea;
TextViewWeakEventManager.VisualLinesChanged.AddListener(textView, this);
TextViewWeakEventManager.ScrollOffsetChanged.AddListener(textView, this);
}
/// <summary>
/// Creates a new TextAreaDefaultInputHandler instance.
/// </summary>
public TextAreaDefaultInputHandler(TextArea textArea)
: base(textArea)
{
this.NestedInputHandlers.Add(CaretNavigation = CaretNavigationCommandHandler.Create(textArea));
this.NestedInputHandlers.Add(Editing = EditingCommandHandler.Create(textArea));
this.NestedInputHandlers.Add(MouseSelection = new SelectionMouseHandler(textArea));
this.CommandBindings.Add(new CommandBinding(ApplicationCommands.Undo, ExecuteUndo, CanExecuteUndo));
this.CommandBindings.Add(new CommandBinding(ApplicationCommands.Redo, ExecuteRedo, CanExecuteRedo));
}
internal Caret(TextArea textArea)
{
this.textArea = textArea;
this.textView = textArea.TextView;
position = new TextViewPosition(1, 1, 0);
caretAdorner = new CaretLayer(textView);
textView.InsertLayer(caretAdorner, KnownLayer.Caret, LayerInsertionPosition.Replace);
textView.VisualLinesChanged += TextView_VisualLinesChanged;
textView.ScrollOffsetChanged += TextView_ScrollOffsetChanged;
}
EventHandler requerySuggestedHandler; // we need to keep the event handler instance alive because CommandManager.RequerySuggested uses weak references
#endregion Fields
#region Constructors
public ImeSupport(TextArea textArea)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
this.textArea = textArea;
InputMethod.SetIsInputMethodSuspended(this.textArea, textArea.Options.EnableImeSupport);
// We listen to CommandManager.RequerySuggested for both caret offset changes and changes to the set of read-only sections.
// This is because there's no dedicated event for read-only section changes; but RequerySuggested needs to be raised anyways
// to invalidate the Paste command.
requerySuggestedHandler = OnRequerySuggested;
CommandManager.RequerySuggested += requerySuggestedHandler;
textArea.OptionChanged += TextAreaOptionChanged;
}
/// <summary>
/// Creates a new InsertionContext instance.
/// </summary>
public InsertionContext(TextArea textArea, int insertionPosition)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
this.TextArea = textArea;
this.Document = textArea.Document;
this.SelectedText = textArea.Selection.GetText();
this.InsertionPosition = insertionPosition;
this.startPosition = insertionPosition;
DocumentLine startLine = this.Document.GetLineByOffset(insertionPosition);
ISegment indentation = TextUtilities.GetWhitespaceAfter(this.Document, startLine.Offset);
this.Indentation = Document.GetText(indentation.Offset, Math.Min(indentation.EndOffset, insertionPosition) - indentation.Offset);
this.Tab = textArea.Options.IndentationString;
this.LineTerminator = TextUtilities.GetNewLineFromDocument(this.Document, startLine.LineNumber);
}
/// <summary>
/// Creates a new code completion window.
/// </summary>
public CompletionWindow(TextArea textArea)
: base(textArea)
{
// keep height automatic
this.CloseAutomatically = true;
this.SizeToContent = SizeToContent.Height;
this.MaxHeight = 300;
this.Width = 175;
this.Content = completionList;
// prevent user from resizing window to 0x0
this.MinHeight = 15;
this.MinWidth = 30;
toolTip.PlacementTarget = this;
toolTip.Placement = PlacementMode.Right;
toolTip.Closed += toolTip_Closed;
AttachEvents();
}
static void CopyWholeLine(TextArea textArea, DocumentLine line)
{
ISegment wholeLine = new SimpleSegment(line.Offset, line.TotalLength);
string text = textArea.Document.GetText(wholeLine);
// Ensure we use the appropriate newline sequence for the OS
text = TextUtilities.NormalizeNewLines(text, Environment.NewLine);
DataObject data = new DataObject(text);
// Also copy text in HTML format to clipboard - good for pasting text into Word
// or to the SharpDevelop forums.
IHighlighter highlighter = textArea.GetService(typeof(IHighlighter)) as IHighlighter;
HtmlClipboard.SetHtml(data, HtmlClipboard.CreateHtmlFragment(textArea.Document, highlighter, wholeLine, new HtmlOptions(textArea.Options)));
MemoryStream lineSelected = new MemoryStream(1);
lineSelected.WriteByte(1);
data.SetData(LineSelectedType, lineSelected, false);
try {
Clipboard.SetDataObject(data, true);
} catch (ExternalException) {
// Apparently this exception sometimes happens randomly.
// The MS controls just ignore it, so we'll do the same.
return;
}
textArea.OnTextCopied(new TextEventArgs(text));
}
/// <summary>
/// Creates a new <see cref="TextAreaInputHandler"/> for the text area.
/// </summary>
public static TextAreaInputHandler Create(TextArea textArea)
{
TextAreaInputHandler handler = new TextAreaInputHandler(textArea);
handler.CommandBindings.AddRange(CommandBindings);
handler.InputBindings.AddRange(InputBindings);
return handler;
}
static void ConvertTabsToSpaces(TextArea textArea, ISegment segment)
{
TextDocument document = textArea.Document;
int endOffset = segment.EndOffset;
string indentationString = new string(' ', textArea.Options.IndentationSize);
for (int offset = segment.Offset; offset < endOffset; offset++) {
if (document.GetCharAt(offset) == '\t') {
document.Replace(offset, 1, indentationString, OffsetChangeMappingType.CharacterReplace);
endOffset += indentationString.Length - 1;
}
}
}
static void CopySelectedText(TextArea textArea)
{
var data = textArea.Selection.CreateDataObject(textArea);
try {
Clipboard.SetDataObject(data, true);
} catch (ExternalException) {
// Apparently this exception sometimes happens randomly.
// The MS controls just ignore it, so we'll do the same.
return;
}
string text = textArea.Selection.GetText();
text = TextUtilities.NormalizeNewLines(text, Environment.NewLine);
textArea.OnTextCopied(new TextEventArgs(text));
}
/*
void DemoMode()
{
foldingGenerator = new FoldingElementGenerator() { FoldingManager = fm };
foldingMargin = new FoldingMargin { FoldingManager = fm };
foldingMarginBorder = new Border {
Child = foldingMargin,
Background = new LinearGradientBrush(Colors.White, Colors.Transparent, 0)
};
foldingMarginBorder.SizeChanged += UpdateTextViewClip;
textEditor.TextArea.TextView.ElementGenerators.Add(foldingGenerator);
textEditor.TextArea.LeftMargins.Add(foldingMarginBorder);
}
void UpdateTextViewClip(object sender, SizeChangedEventArgs e)
{
textEditor.TextArea.TextView.Clip = new RectangleGeometry(
new Rect(-foldingMarginBorder.ActualWidth,
0,
textEditor.TextArea.TextView.ActualWidth + foldingMarginBorder.ActualWidth,
textEditor.TextArea.TextView.ActualHeight));
}
*/
public void Uninstall()
{
Clear();
if (textArea != null) {
textArea.Caret.PositionChanged -= textArea_Caret_PositionChanged;
textArea.LeftMargins.Remove(margin);
textArea.TextView.ElementGenerators.Remove(generator);
textArea.TextView.Services.RemoveService(typeof(FoldingManager));
margin = null;
generator = null;
textArea = null;
}
}
static void ConvertSpacesToTabs(TextArea textArea, ISegment segment)
{
TextDocument document = textArea.Document;
int endOffset = segment.EndOffset;
int indentationSize = textArea.Options.IndentationSize;
int spacesCount = 0;
for (int offset = segment.Offset; offset < endOffset; offset++) {
if (document.GetCharAt(offset) == ' ') {
spacesCount++;
if (spacesCount == indentationSize) {
document.Replace(offset - (indentationSize - 1), indentationSize, "\t", OffsetChangeMappingType.CharacterReplace);
spacesCount = 0;
offset -= indentationSize - 1;
endOffset -= indentationSize - 1;
}
} else {
spacesCount = 0;
}
}
}
public SelectionColorizer(TextArea textArea)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
this.textArea = textArea;
}
/// <summary>
/// Attaches this SearchPanel to a TextArea instance.
/// </summary>
public void Attach(TextArea textArea)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
this.textArea = textArea;
adorner = new SearchPanelAdorner(textArea, this);
DataContext = this;
renderer = new SearchResultBackgroundRenderer();
currentDocument = textArea.Document;
if (currentDocument != null)
currentDocument.TextChanged += textArea_Document_TextChanged;
textArea.DocumentChanged += textArea_DocumentChanged;
KeyDown += SearchLayerKeyDown;
this.CommandBindings.Add(new CommandBinding(SearchCommands.FindNext, (sender, e) => FindNext()));
this.CommandBindings.Add(new CommandBinding(SearchCommands.FindPrevious, (sender, e) => FindPrevious()));
this.CommandBindings.Add(new CommandBinding(SearchCommands.CloseSearchPanel, (sender, e) => Close()));
IsClosed = true;
}
/// <summary>
/// Creates a new simple selection that selects the text in the specified segment.
/// </summary>
public static Selection Create(TextArea textArea, ISegment segment)
{
if (segment == null)
throw new ArgumentNullException("segment");
return Create(textArea, segment.Offset, segment.EndOffset);
}
internal static Selection Create(TextArea textArea, TextViewPosition start, TextViewPosition end)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
if (textArea.Document.GetOffset(start.Location) == textArea.Document.GetOffset(end.Location) && start.VisualColumn == end.VisualColumn)
return textArea.emptySelection;
else
return new SimpleSelection(textArea, start, end);
}
public SelectionMouseHandler(TextArea textArea)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
this.textArea = textArea;
}
public RestoreCaretAndSelectionUndoAction(TextArea textArea)
{
this.textAreaReference = new WeakReference(textArea);
// Just save the old caret position, no need to validate here.
// If we restore it, we'll validate it anyways.
this.caretPosition = textArea.Caret.NonValidatedPosition;
this.selection = textArea.Selection;
}
/// <summary>
/// Adds Folding support to the specified text area.
/// Warning: The folding manager is only valid for the text area's current document. The folding manager
/// must be uninstalled before the text area is bound to a different document.
/// </summary>
/// <returns>The <see cref="FoldingManager"/> that manages the list of foldings inside the text area.</returns>
public static FoldingManager Install(TextArea textArea)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
return new FoldingManagerInstallation(textArea);
}
/// <summary>
/// Creates a new InsightWindow.
/// </summary>
public InsightWindow(TextArea textArea)
: base(textArea)
{
this.CloseAutomatically = true;
AttachEvents();
}
public SearchPanelAdorner(TextArea textArea, SearchPanel panel)
: base(textArea)
{
this.panel = panel;
AddVisualChild(panel);
}
/// <summary>
/// Creates a new simple selection that selects the text from startOffset to endOffset.
/// </summary>
public static Selection Create(TextArea textArea, int startOffset, int endOffset)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
if (startOffset == endOffset)
return textArea.emptySelection;
else
return new SimpleSelection(textArea,
new TextViewPosition(textArea.Document.GetLocation(startOffset)),
new TextViewPosition(textArea.Document.GetLocation(endOffset)));
}
public FoldingManagerInstallation(TextArea textArea)
: base(textArea.Document)
{
this.textArea = textArea;
margin = new FoldingMargin() { FoldingManager = this };
generator = new FoldingElementGenerator() { FoldingManager = this };
textArea.LeftMargins.Add(margin);
textArea.TextView.Services.AddService(typeof(FoldingManager), this);
// HACK: folding only works correctly when it has highest priority
textArea.TextView.ElementGenerators.Insert(0, generator);
textArea.Caret.PositionChanged += textArea_Caret_PositionChanged;
}
/// <summary>
/// Creates a data object containing the selection's text.
/// </summary>
public virtual DataObject CreateDataObject(TextArea textArea)
{
string text = GetText();
// Ensure we use the appropriate newline sequence for the OS
DataObject data = new DataObject(TextUtilities.NormalizeNewLines(text, Environment.NewLine));
// we cannot use DataObject.SetText - then we cannot drag to SciTe
// (but dragging to Word works in both cases)
// Also copy text in HTML format to clipboard - good for pasting text into Word
// or to the SharpDevelop forums.
HtmlClipboard.SetHtml(data, CreateHtmlFragment(new HtmlOptions(textArea.Options)));
return data;
}
public static bool SetCompositionFont(HwndSource source, IntPtr hIMC, TextArea textArea)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
LOGFONT lf = new LOGFONT();
Rect characterBounds = textArea.TextView.GetCharacterBounds(textArea.Caret.Position, source);
lf.lfFaceName = textArea.FontFamily.Source;
lf.lfHeight = (int)characterBounds.Height;
return ImmSetCompositionFont(hIMC, ref lf);
}
/// <summary>
/// Constructor for Selection.
/// </summary>
protected Selection(TextArea textArea)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
this.textArea = textArea;
}
public static bool SetCompositionWindow(HwndSource source, IntPtr hIMC, TextArea textArea)
{
if (textArea == null)
throw new ArgumentNullException("textArea");
Rect textViewBounds = textArea.TextView.GetBounds(source);
Rect characterBounds = textArea.TextView.GetCharacterBounds(textArea.Caret.Position, source);
CompositionForm form = new CompositionForm();
form.dwStyle = 0x0020;
form.ptCurrentPos.x = (int)Math.Max(characterBounds.Left, textViewBounds.Left);
form.ptCurrentPos.y = (int)Math.Max(characterBounds.Top, textViewBounds.Top);
form.rcArea.left = (int)textViewBounds.Left;
form.rcArea.top = (int)textViewBounds.Top;
form.rcArea.right = (int)textViewBounds.Right;
form.rcArea.bottom = (int)textViewBounds.Bottom;
return ImmSetCompositionWindow(hIMC, ref form);
}
