Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / MS / Internal / documents / FlowDocumentView.cs / 1 / FlowDocumentView.cs
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// File: FlowDocumentView.cs
//
// Description: Provides a view port for content of FlowDocument formatted
// bottomless area.
//
// History:
// 11/07/2005 : grzegorz - created.
//
//---------------------------------------------------------------------------
using System; // Object
using System.Windows; // Size
using System.Windows.Controls; // ScrollViewer
using System.Windows.Controls.Primitives; // IScrollInfo
using System.Windows.Documents; // FlowDocument
using System.Windows.Media; // Visual
using System.Windows.Media.Imaging; // RenderTargetBitmap
using MS.Internal.PtsHost; // FlowDocumentPage
using MS.Internal.Text; // TextDpi
namespace MS.Internal.Documents
{
///
/// Provides a view port for content of FlowDocument formatted bottomless area.
///
internal class FlowDocumentView : FrameworkElement, IScrollInfo, IServiceProvider
{
//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
///
/// Static Constructor
///
static FlowDocumentView()
{
}
///
/// Constructor
///
internal FlowDocumentView()
{
}
#endregion Constructors
//--------------------------------------------------------------------
//
// Protected Methods
//
//-------------------------------------------------------------------
#region Protected Methods
///
/// Content measurement.
///
/// Constraint size.
/// Computed desired size.
protected sealed override Size MeasureOverride(Size constraint)
{
Size desiredSize = new Size();
if (_suspendLayout)
{
desiredSize = this.DesiredSize;
}
else if (Document != null)
{
// Create bottomless formatter, if necessary.
EnsureFormatter();
// Format bottomless content.
_formatter.Format(constraint);
// DesiredSize is set to the calculated size of the page.
// If hosted by ScrollViewer, desired size is limited to constraint.
if (_scrollData != null)
{
desiredSize.Width = Math.Min(constraint.Width, _formatter.DocumentPage.Size.Width);
desiredSize.Height = Math.Min(constraint.Height, _formatter.DocumentPage.Size.Height);
}
else
{
desiredSize = _formatter.DocumentPage.Size;
}
}
return desiredSize;
}
///
/// Content arrangement.
///
/// Size that element should use to arrange itself and its children.
protected sealed override Size ArrangeOverride(Size arrangeSize)
{
Rect viewport = Rect.Empty;
Vector offset;
bool invalidateScrollInfo = false;
Size safeArrangeSize = arrangeSize;
if (!_suspendLayout)
{
// Convert to TextDpi and convert back to double, to make sure that we are not
// getting rounding errors later.
TextDpi.SnapToTextDpi(ref safeArrangeSize);
if (Document != null)
{
// Create bottomless formatter, if necessary.
EnsureFormatter();
// Arrange bottomless content.
if (_scrollData != null)
{
if (!DoubleUtil.AreClose(_scrollData.Viewport, safeArrangeSize))
{
_scrollData.Viewport = safeArrangeSize;
invalidateScrollInfo = true;
}
if (!DoubleUtil.AreClose(_scrollData.Extent, _formatter.DocumentPage.Size))
{
_scrollData.Extent = _formatter.DocumentPage.Size;
invalidateScrollInfo = true;
// DocumentPage Size is calculated by converting double to int and then back to double.
// This conversion may produce rounding errors and force us to show scrollbars in cases
// when extent is within 1px from viewport. To workaround this issue, snap extent to viewport
// if we are within 1px range.
if (Math.Abs(_scrollData.ExtentWidth - _scrollData.ViewportWidth) < 1)
{
_scrollData.ExtentWidth = _scrollData.ViewportWidth;
}
if (Math.Abs(_scrollData.ExtentHeight - _scrollData.ViewportHeight) < 1)
{
_scrollData.ExtentHeight = _scrollData.ViewportHeight;
}
}
offset = new Vector(
Math.Max(0, Math.Min(_scrollData.ExtentWidth - _scrollData.ViewportWidth, _scrollData.HorizontalOffset)),
Math.Max(0, Math.Min(_scrollData.ExtentHeight - _scrollData.ViewportHeight, _scrollData.VerticalOffset)));
if (!DoubleUtil.AreClose(offset, _scrollData.Offset))
{
_scrollData.Offset = offset;
invalidateScrollInfo = true;
}
if (invalidateScrollInfo && _scrollData.ScrollOwner != null)
{
_scrollData.ScrollOwner.InvalidateScrollInfo();
}
viewport = new Rect(_scrollData.HorizontalOffset, _scrollData.VerticalOffset, safeArrangeSize.Width, safeArrangeSize.Height);
}
_formatter.Arrange(safeArrangeSize, viewport);
// Connect to visual tree.
if (_pageVisual != _formatter.DocumentPage.Visual)
{
if (_textView != null)
{
_textView.OnPageConnected();
}
if (_pageVisual != null)
{
RemoveVisualChild(_pageVisual);
}
_pageVisual = (PageVisual)_formatter.DocumentPage.Visual;
AddVisualChild(_pageVisual);
}
// Set appropriate content offset
if (_scrollData != null)
{
_pageVisual.Offset = new Vector(-_scrollData.HorizontalOffset, -_scrollData.VerticalOffset);
}
// DocumentPage.Visual is always returned in LeftToRight FlowDirection.
// Hence, if the the current FlowDirection is RightToLeft,
// mirroring transform need to be applied to the content.
PtsHelper.UpdateMirroringTransform(FlowDirection, FlowDirection.LeftToRight, _pageVisual, safeArrangeSize.Width);
}
else
{
if (_pageVisual != null)
{
if (_textView != null)
{
_textView.OnPageDisconnected();
}
RemoveVisualChild(_pageVisual);
_pageVisual = null;
}
// Arrange bottomless content.
if (_scrollData != null)
{
if (!DoubleUtil.AreClose(_scrollData.Viewport, safeArrangeSize))
{
_scrollData.Viewport = safeArrangeSize;
invalidateScrollInfo = true;
}
if (!DoubleUtil.AreClose(_scrollData.Extent, new Size()))
{
_scrollData.Extent = new Size();
invalidateScrollInfo = true;
}
if (!DoubleUtil.AreClose(_scrollData.Offset, new Vector()))
{
_scrollData.Offset = new Vector();
invalidateScrollInfo = true;
}
if (invalidateScrollInfo && _scrollData.ScrollOwner != null)
{
_scrollData.ScrollOwner.InvalidateScrollInfo();
}
}
}
}
return arrangeSize;
}
///
/// Returns visual child at specified index. FlowDocumentView has just one child.
///
protected override Visual GetVisualChild(int index)
{
if (index != 0)
{
throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange));
}
return _pageVisual;
}
#endregion Protected Methods
//--------------------------------------------------------------------
//
// Protected Properties
//
//--------------------------------------------------------------------
#region Protected Properties
///
/// Returns number of children. FlowDocumentView has just one child.
///
protected override int VisualChildrenCount
{
get
{
return _pageVisual == null ? 0 : 1;
}
}
#endregion Protected Properties
//-------------------------------------------------------------------
//
// Internal Methods
//
//--------------------------------------------------------------------
#region Internal Methods
///
/// Suspends page layout.
///
internal void SuspendLayout()
{
_suspendLayout = true;
if (_pageVisual != null)
{
_pageVisual.Opacity = 0.5;
}
}
///
/// Resumes page layout.
///
internal void ResumeLayout()
{
_suspendLayout = false;
if (_pageVisual != null)
{
_pageVisual.Opacity = 1.0;
}
InvalidateMeasure();
}
#endregion Internal Methods
//-------------------------------------------------------------------
//
// Internal Properties
//
//-------------------------------------------------------------------
#region Internal Properties
///
/// BreakRecordTable.
///
internal FlowDocument Document
{
get
{
return _document;
}
set
{
if (_formatter != null)
{
HandleFormatterSuspended(_formatter, EventArgs.Empty);
}
_suspendLayout = false;
_textView = null;
_document = value;
InvalidateMeasure();
InvalidateVisual(); //ensure re-rendering
}
}
///
/// DocumentPage.
///
internal FlowDocumentPage DocumentPage
{
get
{
if (_document != null)
{
EnsureFormatter();
return _formatter.DocumentPage;
}
return null;
}
}
#endregion Internal Properties
//-------------------------------------------------------------------
//
// Private Methods
//
//--------------------------------------------------------------------
#region Private Methods
///
/// Ensures valid instance of FlowDocumentFormatter.
///
private void EnsureFormatter()
{
Invariant.Assert(_document != null);
if (_formatter == null)
{
_formatter = _document.BottomlessFormatter;
_formatter.ContentInvalidated += new EventHandler(HandleContentInvalidated);
_formatter.Suspended += new EventHandler(HandleFormatterSuspended);
}
Invariant.Assert(_formatter == _document.BottomlessFormatter);
}
///
/// Responds to content invalidation.
///
private void HandleContentInvalidated(object sender, EventArgs e)
{
Invariant.Assert(sender == _formatter);
InvalidateMeasure();
InvalidateVisual(); //ensure re-rendering
}
///
/// Responds to formatter suspention.
///
private void HandleFormatterSuspended(object sender, EventArgs e)
{
Invariant.Assert(sender == _formatter);
// Disconnect formatter.
_formatter.ContentInvalidated -= new EventHandler(HandleContentInvalidated);
_formatter.Suspended -= new EventHandler(HandleFormatterSuspended);
_formatter = null;
// Disconnect any content associated with the formatter.
if (_pageVisual != null && !_suspendLayout)
{
if (_textView != null)
{
_textView.OnPageDisconnected();
}
RemoveVisualChild(_pageVisual);
_pageVisual = null;
}
}
#endregion Private Methods
//-------------------------------------------------------------------
//
// Private Fields
//
//--------------------------------------------------------------------
#region Private Fields
private FlowDocument _document; // Hosted FlowDocument
private PageVisual _pageVisual; // Visual representing the content
private FlowDocumentFormatter _formatter; // Bottomless formatter associated with FlowDocument
private ScrollData _scrollData; // IScrollInfo related data, if hosted by ScrollViewer
private DocumentPageTextView _textView; // TextView associated with this element.
private bool _suspendLayout; // Layout of the page is suspended.
#endregion Private Fields
//--------------------------------------------------------------------
//
// IScrollInfo Members
//
//-------------------------------------------------------------------
#region IScrollInfo Members
///
///
void IScrollInfo.LineUp()
{
if (_scrollData != null)
{
_scrollData.LineUp(this);
}
}
///
///
void IScrollInfo.LineDown()
{
if (_scrollData != null)
{
_scrollData.LineDown(this);
}
}
///
///
void IScrollInfo.LineLeft()
{
if (_scrollData != null)
{
_scrollData.LineLeft(this);
}
}
///
///
void IScrollInfo.LineRight()
{
if (_scrollData != null)
{
_scrollData.LineRight(this);
}
}
///
///
void IScrollInfo.PageUp()
{
if (_scrollData != null)
{
_scrollData.PageUp(this);
}
}
///
///
void IScrollInfo.PageDown()
{
if (_scrollData != null)
{
_scrollData.PageDown(this);
}
}
///
///
void IScrollInfo.PageLeft()
{
if (_scrollData != null)
{
_scrollData.PageLeft(this);
}
}
///
///
void IScrollInfo.PageRight()
{
if (_scrollData != null)
{
_scrollData.PageRight(this);
}
}
///
///
void IScrollInfo.MouseWheelUp()
{
if (_scrollData != null)
{
_scrollData.MouseWheelUp(this);
}
}
///
///
void IScrollInfo.MouseWheelDown()
{
if (_scrollData != null)
{
_scrollData.MouseWheelDown(this);
}
}
///
///
void IScrollInfo.MouseWheelLeft()
{
if (_scrollData != null)
{
_scrollData.MouseWheelLeft(this);
}
}
///
///
void IScrollInfo.MouseWheelRight()
{
if (_scrollData != null)
{
_scrollData.MouseWheelRight(this);
}
}
///
///
void IScrollInfo.SetHorizontalOffset(double offset)
{
if (_scrollData != null)
{
_scrollData.SetHorizontalOffset(this, offset);
}
}
///
///
void IScrollInfo.SetVerticalOffset(double offset)
{
if (_scrollData != null)
{
_scrollData.SetVerticalOffset(this, offset);
}
}
///
///
Rect IScrollInfo.MakeVisible(Visual visual, Rect rectangle)
{
if (_scrollData == null)
{
rectangle = Rect.Empty;
}
else
{
rectangle = _scrollData.MakeVisible(this, visual, rectangle);
}
return rectangle;
}
///
///
bool IScrollInfo.CanVerticallyScroll
{
get
{
return (_scrollData != null) ? _scrollData.CanVerticallyScroll : false;
}
set
{
if (_scrollData != null)
{
_scrollData.CanVerticallyScroll = value;
}
}
}
///
///
bool IScrollInfo.CanHorizontallyScroll
{
get
{
return (_scrollData != null) ? _scrollData.CanHorizontallyScroll : false;
}
set
{
if (_scrollData != null)
{
_scrollData.CanHorizontallyScroll = value;
}
}
}
///
///
double IScrollInfo.ExtentWidth
{
get
{
return (_scrollData != null) ? _scrollData.ExtentWidth : 0;
}
}
///
///
double IScrollInfo.ExtentHeight
{
get
{
return (_scrollData != null) ? _scrollData.ExtentHeight : 0;
}
}
///
///
double IScrollInfo.ViewportWidth
{
get
{
return (_scrollData != null) ? _scrollData.ViewportWidth : 0;
}
}
///
///
double IScrollInfo.ViewportHeight
{
get
{
return (_scrollData != null) ? _scrollData.ViewportHeight : 0;
}
}
///
///
double IScrollInfo.HorizontalOffset
{
get
{
return (_scrollData != null) ? _scrollData.HorizontalOffset : 0;
}
}
///
///
double IScrollInfo.VerticalOffset
{
get
{
return (_scrollData != null) ? _scrollData.VerticalOffset : 0;
}
}
///
///
ScrollViewer IScrollInfo.ScrollOwner
{
get
{
return (_scrollData != null) ? _scrollData.ScrollOwner : null;
}
set
{
if (_scrollData == null)
{
// Create cached scroll info.
_scrollData = new ScrollData();
}
_scrollData.SetScrollOwner(this, value);
}
}
#endregion IScrollInfo Members
//--------------------------------------------------------------------
//
// IServiceProvider Members
//
//-------------------------------------------------------------------
#region IServiceProvider Members
///
/// Gets the service object of the specified type.
///
///
/// An object that specifies the type of service object to get.
///
///
/// A service object of type serviceType. A null reference if there is no
/// service object of type serviceType.
///
object IServiceProvider.GetService(Type serviceType)
{
object service = null;
if (serviceType == typeof(ITextView))
{
if (_textView == null && _document != null)
{
_textView = new DocumentPageTextView(this, _document.StructuralCache.TextContainer);
}
service = _textView;
}
else if (serviceType == typeof(ITextContainer))
{
if (Document != null)
{
service = Document.StructuralCache.TextContainer as TextContainer;
}
}
return service;
}
#endregion IServiceProvider Members
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// File: FlowDocumentView.cs
//
// Description: Provides a view port for content of FlowDocument formatted
// bottomless area.
//
// History:
// 11/07/2005 : grzegorz - created.
//
//---------------------------------------------------------------------------
using System; // Object
using System.Windows; // Size
using System.Windows.Controls; // ScrollViewer
using System.Windows.Controls.Primitives; // IScrollInfo
using System.Windows.Documents; // FlowDocument
using System.Windows.Media; // Visual
using System.Windows.Media.Imaging; // RenderTargetBitmap
using MS.Internal.PtsHost; // FlowDocumentPage
using MS.Internal.Text; // TextDpi
namespace MS.Internal.Documents
{
///
/// Provides a view port for content of FlowDocument formatted bottomless area.
///
internal class FlowDocumentView : FrameworkElement, IScrollInfo, IServiceProvider
{
//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
///
/// Static Constructor
///
static FlowDocumentView()
{
}
///
/// Constructor
///
internal FlowDocumentView()
{
}
#endregion Constructors
//--------------------------------------------------------------------
//
// Protected Methods
//
//-------------------------------------------------------------------
#region Protected Methods
///
/// Content measurement.
///
/// Constraint size.
/// Computed desired size.
protected sealed override Size MeasureOverride(Size constraint)
{
Size desiredSize = new Size();
if (_suspendLayout)
{
desiredSize = this.DesiredSize;
}
else if (Document != null)
{
// Create bottomless formatter, if necessary.
EnsureFormatter();
// Format bottomless content.
_formatter.Format(constraint);
// DesiredSize is set to the calculated size of the page.
// If hosted by ScrollViewer, desired size is limited to constraint.
if (_scrollData != null)
{
desiredSize.Width = Math.Min(constraint.Width, _formatter.DocumentPage.Size.Width);
desiredSize.Height = Math.Min(constraint.Height, _formatter.DocumentPage.Size.Height);
}
else
{
desiredSize = _formatter.DocumentPage.Size;
}
}
return desiredSize;
}
///
/// Content arrangement.
///
/// Size that element should use to arrange itself and its children.
protected sealed override Size ArrangeOverride(Size arrangeSize)
{
Rect viewport = Rect.Empty;
Vector offset;
bool invalidateScrollInfo = false;
Size safeArrangeSize = arrangeSize;
if (!_suspendLayout)
{
// Convert to TextDpi and convert back to double, to make sure that we are not
// getting rounding errors later.
TextDpi.SnapToTextDpi(ref safeArrangeSize);
if (Document != null)
{
// Create bottomless formatter, if necessary.
EnsureFormatter();
// Arrange bottomless content.
if (_scrollData != null)
{
if (!DoubleUtil.AreClose(_scrollData.Viewport, safeArrangeSize))
{
_scrollData.Viewport = safeArrangeSize;
invalidateScrollInfo = true;
}
if (!DoubleUtil.AreClose(_scrollData.Extent, _formatter.DocumentPage.Size))
{
_scrollData.Extent = _formatter.DocumentPage.Size;
invalidateScrollInfo = true;
// DocumentPage Size is calculated by converting double to int and then back to double.
// This conversion may produce rounding errors and force us to show scrollbars in cases
// when extent is within 1px from viewport. To workaround this issue, snap extent to viewport
// if we are within 1px range.
if (Math.Abs(_scrollData.ExtentWidth - _scrollData.ViewportWidth) < 1)
{
_scrollData.ExtentWidth = _scrollData.ViewportWidth;
}
if (Math.Abs(_scrollData.ExtentHeight - _scrollData.ViewportHeight) < 1)
{
_scrollData.ExtentHeight = _scrollData.ViewportHeight;
}
}
offset = new Vector(
Math.Max(0, Math.Min(_scrollData.ExtentWidth - _scrollData.ViewportWidth, _scrollData.HorizontalOffset)),
Math.Max(0, Math.Min(_scrollData.ExtentHeight - _scrollData.ViewportHeight, _scrollData.VerticalOffset)));
if (!DoubleUtil.AreClose(offset, _scrollData.Offset))
{
_scrollData.Offset = offset;
invalidateScrollInfo = true;
}
if (invalidateScrollInfo && _scrollData.ScrollOwner != null)
{
_scrollData.ScrollOwner.InvalidateScrollInfo();
}
viewport = new Rect(_scrollData.HorizontalOffset, _scrollData.VerticalOffset, safeArrangeSize.Width, safeArrangeSize.Height);
}
_formatter.Arrange(safeArrangeSize, viewport);
// Connect to visual tree.
if (_pageVisual != _formatter.DocumentPage.Visual)
{
if (_textView != null)
{
_textView.OnPageConnected();
}
if (_pageVisual != null)
{
RemoveVisualChild(_pageVisual);
}
_pageVisual = (PageVisual)_formatter.DocumentPage.Visual;
AddVisualChild(_pageVisual);
}
// Set appropriate content offset
if (_scrollData != null)
{
_pageVisual.Offset = new Vector(-_scrollData.HorizontalOffset, -_scrollData.VerticalOffset);
}
// DocumentPage.Visual is always returned in LeftToRight FlowDirection.
// Hence, if the the current FlowDirection is RightToLeft,
// mirroring transform need to be applied to the content.
PtsHelper.UpdateMirroringTransform(FlowDirection, FlowDirection.LeftToRight, _pageVisual, safeArrangeSize.Width);
}
else
{
if (_pageVisual != null)
{
if (_textView != null)
{
_textView.OnPageDisconnected();
}
RemoveVisualChild(_pageVisual);
_pageVisual = null;
}
// Arrange bottomless content.
if (_scrollData != null)
{
if (!DoubleUtil.AreClose(_scrollData.Viewport, safeArrangeSize))
{
_scrollData.Viewport = safeArrangeSize;
invalidateScrollInfo = true;
}
if (!DoubleUtil.AreClose(_scrollData.Extent, new Size()))
{
_scrollData.Extent = new Size();
invalidateScrollInfo = true;
}
if (!DoubleUtil.AreClose(_scrollData.Offset, new Vector()))
{
_scrollData.Offset = new Vector();
invalidateScrollInfo = true;
}
if (invalidateScrollInfo && _scrollData.ScrollOwner != null)
{
_scrollData.ScrollOwner.InvalidateScrollInfo();
}
}
}
}
return arrangeSize;
}
///
/// Returns visual child at specified index. FlowDocumentView has just one child.
///
protected override Visual GetVisualChild(int index)
{
if (index != 0)
{
throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange));
}
return _pageVisual;
}
#endregion Protected Methods
//--------------------------------------------------------------------
//
// Protected Properties
//
//--------------------------------------------------------------------
#region Protected Properties
///
/// Returns number of children. FlowDocumentView has just one child.
///
protected override int VisualChildrenCount
{
get
{
return _pageVisual == null ? 0 : 1;
}
}
#endregion Protected Properties
//-------------------------------------------------------------------
//
// Internal Methods
//
//--------------------------------------------------------------------
#region Internal Methods
///
/// Suspends page layout.
///
internal void SuspendLayout()
{
_suspendLayout = true;
if (_pageVisual != null)
{
_pageVisual.Opacity = 0.5;
}
}
///
/// Resumes page layout.
///
internal void ResumeLayout()
{
_suspendLayout = false;
if (_pageVisual != null)
{
_pageVisual.Opacity = 1.0;
}
InvalidateMeasure();
}
#endregion Internal Methods
//-------------------------------------------------------------------
//
// Internal Properties
//
//-------------------------------------------------------------------
#region Internal Properties
///
/// BreakRecordTable.
///
internal FlowDocument Document
{
get
{
return _document;
}
set
{
if (_formatter != null)
{
HandleFormatterSuspended(_formatter, EventArgs.Empty);
}
_suspendLayout = false;
_textView = null;
_document = value;
InvalidateMeasure();
InvalidateVisual(); //ensure re-rendering
}
}
///
/// DocumentPage.
///
internal FlowDocumentPage DocumentPage
{
get
{
if (_document != null)
{
EnsureFormatter();
return _formatter.DocumentPage;
}
return null;
}
}
#endregion Internal Properties
//-------------------------------------------------------------------
//
// Private Methods
//
//--------------------------------------------------------------------
#region Private Methods
///
/// Ensures valid instance of FlowDocumentFormatter.
///
private void EnsureFormatter()
{
Invariant.Assert(_document != null);
if (_formatter == null)
{
_formatter = _document.BottomlessFormatter;
_formatter.ContentInvalidated += new EventHandler(HandleContentInvalidated);
_formatter.Suspended += new EventHandler(HandleFormatterSuspended);
}
Invariant.Assert(_formatter == _document.BottomlessFormatter);
}
///
/// Responds to content invalidation.
///
private void HandleContentInvalidated(object sender, EventArgs e)
{
Invariant.Assert(sender == _formatter);
InvalidateMeasure();
InvalidateVisual(); //ensure re-rendering
}
///
/// Responds to formatter suspention.
///
private void HandleFormatterSuspended(object sender, EventArgs e)
{
Invariant.Assert(sender == _formatter);
// Disconnect formatter.
_formatter.ContentInvalidated -= new EventHandler(HandleContentInvalidated);
_formatter.Suspended -= new EventHandler(HandleFormatterSuspended);
_formatter = null;
// Disconnect any content associated with the formatter.
if (_pageVisual != null && !_suspendLayout)
{
if (_textView != null)
{
_textView.OnPageDisconnected();
}
RemoveVisualChild(_pageVisual);
_pageVisual = null;
}
}
#endregion Private Methods
//-------------------------------------------------------------------
//
// Private Fields
//
//--------------------------------------------------------------------
#region Private Fields
private FlowDocument _document; // Hosted FlowDocument
private PageVisual _pageVisual; // Visual representing the content
private FlowDocumentFormatter _formatter; // Bottomless formatter associated with FlowDocument
private ScrollData _scrollData; // IScrollInfo related data, if hosted by ScrollViewer
private DocumentPageTextView _textView; // TextView associated with this element.
private bool _suspendLayout; // Layout of the page is suspended.
#endregion Private Fields
//--------------------------------------------------------------------
//
// IScrollInfo Members
//
//-------------------------------------------------------------------
#region IScrollInfo Members
///
///
void IScrollInfo.LineUp()
{
if (_scrollData != null)
{
_scrollData.LineUp(this);
}
}
///
///
void IScrollInfo.LineDown()
{
if (_scrollData != null)
{
_scrollData.LineDown(this);
}
}
///
///
void IScrollInfo.LineLeft()
{
if (_scrollData != null)
{
_scrollData.LineLeft(this);
}
}
///
///
void IScrollInfo.LineRight()
{
if (_scrollData != null)
{
_scrollData.LineRight(this);
}
}
///
///
void IScrollInfo.PageUp()
{
if (_scrollData != null)
{
_scrollData.PageUp(this);
}
}
///
///
void IScrollInfo.PageDown()
{
if (_scrollData != null)
{
_scrollData.PageDown(this);
}
}
///
///
void IScrollInfo.PageLeft()
{
if (_scrollData != null)
{
_scrollData.PageLeft(this);
}
}
///
///
void IScrollInfo.PageRight()
{
if (_scrollData != null)
{
_scrollData.PageRight(this);
}
}
///
///
void IScrollInfo.MouseWheelUp()
{
if (_scrollData != null)
{
_scrollData.MouseWheelUp(this);
}
}
///
///
void IScrollInfo.MouseWheelDown()
{
if (_scrollData != null)
{
_scrollData.MouseWheelDown(this);
}
}
///
///
void IScrollInfo.MouseWheelLeft()
{
if (_scrollData != null)
{
_scrollData.MouseWheelLeft(this);
}
}
///
///
void IScrollInfo.MouseWheelRight()
{
if (_scrollData != null)
{
_scrollData.MouseWheelRight(this);
}
}
///
///
void IScrollInfo.SetHorizontalOffset(double offset)
{
if (_scrollData != null)
{
_scrollData.SetHorizontalOffset(this, offset);
}
}
///
///
void IScrollInfo.SetVerticalOffset(double offset)
{
if (_scrollData != null)
{
_scrollData.SetVerticalOffset(this, offset);
}
}
///
///
Rect IScrollInfo.MakeVisible(Visual visual, Rect rectangle)
{
if (_scrollData == null)
{
rectangle = Rect.Empty;
}
else
{
rectangle = _scrollData.MakeVisible(this, visual, rectangle);
}
return rectangle;
}
///
///
bool IScrollInfo.CanVerticallyScroll
{
get
{
return (_scrollData != null) ? _scrollData.CanVerticallyScroll : false;
}
set
{
if (_scrollData != null)
{
_scrollData.CanVerticallyScroll = value;
}
}
}
///
///
bool IScrollInfo.CanHorizontallyScroll
{
get
{
return (_scrollData != null) ? _scrollData.CanHorizontallyScroll : false;
}
set
{
if (_scrollData != null)
{
_scrollData.CanHorizontallyScroll = value;
}
}
}
///
///
double IScrollInfo.ExtentWidth
{
get
{
return (_scrollData != null) ? _scrollData.ExtentWidth : 0;
}
}
///
///
double IScrollInfo.ExtentHeight
{
get
{
return (_scrollData != null) ? _scrollData.ExtentHeight : 0;
}
}
///
///
double IScrollInfo.ViewportWidth
{
get
{
return (_scrollData != null) ? _scrollData.ViewportWidth : 0;
}
}
///
///
double IScrollInfo.ViewportHeight
{
get
{
return (_scrollData != null) ? _scrollData.ViewportHeight : 0;
}
}
///
///
double IScrollInfo.HorizontalOffset
{
get
{
return (_scrollData != null) ? _scrollData.HorizontalOffset : 0;
}
}
///
///
double IScrollInfo.VerticalOffset
{
get
{
return (_scrollData != null) ? _scrollData.VerticalOffset : 0;
}
}
///
///
ScrollViewer IScrollInfo.ScrollOwner
{
get
{
return (_scrollData != null) ? _scrollData.ScrollOwner : null;
}
set
{
if (_scrollData == null)
{
// Create cached scroll info.
_scrollData = new ScrollData();
}
_scrollData.SetScrollOwner(this, value);
}
}
#endregion IScrollInfo Members
//--------------------------------------------------------------------
//
// IServiceProvider Members
//
//-------------------------------------------------------------------
#region IServiceProvider Members
///
/// Gets the service object of the specified type.
///
///
/// An object that specifies the type of service object to get.
///
///
/// A service object of type serviceType. A null reference if there is no
/// service object of type serviceType.
///
object IServiceProvider.GetService(Type serviceType)
{
object service = null;
if (serviceType == typeof(ITextView))
{
if (_textView == null && _document != null)
{
_textView = new DocumentPageTextView(this, _document.StructuralCache.TextContainer);
}
service = _textView;
}
else if (serviceType == typeof(ITextContainer))
{
if (Document != null)
{
service = Document.StructuralCache.TextContainer as TextContainer;
}
}
return service;
}
#endregion IServiceProvider Members
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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