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//
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
//
// This file contain implementations details that are subject to change without notice.
// Use at your own risk.
//
namespace Microsoft.VisualStudio.Text.EditorPrimitives.Implementation
{
using Microsoft.VisualStudio.Text;
using Microsoft.VisualStudio.Text.Editor;
using Microsoft.VisualStudio.Text.Formatting;
using LegacySelection = Microsoft.VisualStudio.Text.Editor.LegacySelection;
internal sealed class DefaultTextViewPrimitive : TextView
{
private ITextView _textView;
private Caret _caret;
private LegacySelection _selection;
private TextBuffer _textBuffer;
private IViewPrimitivesFactoryService _viewPrimitivesFactory;
internal DefaultTextViewPrimitive(ITextView textView, IViewPrimitivesFactoryService viewPrimitivesFactory, IBufferPrimitivesFactoryService bufferPrimitivesFactory)
{
_textView = textView;
_viewPrimitivesFactory = viewPrimitivesFactory;
_textBuffer = bufferPrimitivesFactory.CreateTextBuffer(textView.TextBuffer);
_caret = _viewPrimitivesFactory.CreateCaret(this);
_selection = _viewPrimitivesFactory.CreateSelection(this);
}
public override void MoveLineToTop(int lineNumber)
{
ITextSnapshotLine line = _textView.TextBuffer.CurrentSnapshot.GetLineFromLineNumber(lineNumber);
_textView.DisplayTextLineContainingBufferPosition(line.Start, 0.0, ViewRelativePosition.Top);
}
public override void MoveLineToBottom(int lineNumber)
{
ITextSnapshotLine line = _textView.TextBuffer.CurrentSnapshot.GetLineFromLineNumber(lineNumber);
_textView.DisplayTextLineContainingBufferPosition(line.Start, 0.0, ViewRelativePosition.Bottom);
}
public override void ScrollUp(int lines)
{
_textView.ViewScroller.ScrollViewportVerticallyByPixels(((double)lines) * _textView.LineHeight);
}
public override void ScrollDown(int lines)
{
_textView.ViewScroller.ScrollViewportVerticallyByPixels(- ((double)lines) * _textView.LineHeight);
}
public override void ScrollPageDown()
{
_textView.ViewScroller.ScrollViewportVerticallyByPage(ScrollDirection.Down);
}
public override void ScrollPageUp()
{
_textView.ViewScroller.ScrollViewportVerticallyByPage(ScrollDirection.Up);
}
public override bool Show(DisplayTextPoint point, HowToShow howToShow)
{
if (howToShow == HowToShow.AsIs)
{
_textView.ViewScroller.EnsureSpanVisible(new SnapshotSpan(point.AdvancedTextPoint, 0), EnsureSpanVisibleOptions.MinimumScroll);
}
else if (howToShow == HowToShow.Centered)
{
_textView.ViewScroller.EnsureSpanVisible(new SnapshotSpan(point.AdvancedTextPoint, 0), EnsureSpanVisibleOptions.AlwaysCenter);
}
else if (howToShow == HowToShow.OnFirstLineOfView)
{
_textView.DisplayTextLineContainingBufferPosition(point.AdvancedTextPoint, 0.0, ViewRelativePosition.Top);
}
return point.IsVisible;
}
public override VisibilityState Show(DisplayTextRange textRange, HowToShow howToShow)
{
if (howToShow == HowToShow.AsIs)
{
_textView.ViewScroller.EnsureSpanVisible(textRange.AdvancedTextRange, EnsureSpanVisibleOptions.MinimumScroll);
}
else if (howToShow == HowToShow.Centered)
{
_textView.ViewScroller.EnsureSpanVisible(textRange.AdvancedTextRange, EnsureSpanVisibleOptions.AlwaysCenter);
}
else if (howToShow == HowToShow.OnFirstLineOfView)
{
_textView.DisplayTextLineContainingBufferPosition(textRange.AdvancedTextRange.Start, 0.0, ViewRelativePosition.Top);
}
return textRange.Visibility;
}
public override DisplayTextPoint GetTextPoint(int position)
{
return _viewPrimitivesFactory.CreateDisplayTextPoint(this, position);
}
public override DisplayTextPoint GetTextPoint(TextPoint textPoint)
{
return GetTextPoint(textPoint.CurrentPosition);
}
public override DisplayTextPoint GetTextPoint(int line, int column)
{
ITextSnapshotLine snapshotLine = _textView.TextBuffer.CurrentSnapshot.GetLineFromLineNumber(line);
return GetTextPoint(snapshotLine.Start + column);
}
public override DisplayTextRange GetTextRange(TextPoint startPoint, TextPoint endPoint)
{
return GetTextRange(TextBuffer.GetTextRange(startPoint, endPoint));
}
public override DisplayTextRange GetTextRange(TextRange textRange)
{
return _viewPrimitivesFactory.CreateDisplayTextRange(this, textRange);
}
public override DisplayTextRange GetTextRange(int startPosition, int endPosition)
{
return GetTextRange(TextBuffer.GetTextPoint(startPosition), TextBuffer.GetTextPoint(endPosition));
}
public override DisplayTextRange VisibleSpan
{
get { return GetTextRange(_textView.TextViewLines.FirstVisibleLine.Start, _textView.TextViewLines.LastVisibleLine.EndIncludingLineBreak); }
}
public override ITextView AdvancedTextView
{
get { return _textView; }
}
public override Caret Caret
{
get { return _caret; }
}
public override LegacySelection Selection
{
get { return _selection; }
}
public override TextBuffer TextBuffer
{
get { return _textBuffer; }
}
}
}
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