Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / MS / Internal / PtsHost / BaseParagraph.cs / 1 / BaseParagraph.cs
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// Description: BaseParagraph represents a paragraph corresponding to part
// of a text based content.
//
// History:
// 05/05/2003 : grzegorz - moving from Avalon branch.
// 10/30/2004 : grzegorz - ElementReference cleanup.
//
//---------------------------------------------------------------------------
using System;
using System.Diagnostics;
using System.Windows;
using System.Windows.Documents;
using MS.Internal.Documents;
using MS.Internal.Text;
using MS.Internal.PtsHost.UnsafeNativeMethods;
namespace MS.Internal.PtsHost
{
///
/// BaseParagraph represents a paragraph corresponding to part of a text
/// based content.
///
internal abstract class BaseParagraph : UnmanagedHandle
{
//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
///
/// Constructor.
///
///
/// Element associated with paragraph.
///
///
/// Content's structural cache
///
protected BaseParagraph(DependencyObject element, StructuralCache structuralCache)
: base(structuralCache.PtsContext)
{
_element = element;
_structuralCache = structuralCache;
_changeType = PTS.FSKCHANGE.fskchNone;
_stopAsking = false;
UpdateLastFormatPositions();
}
#endregion Constructors
// ------------------------------------------------------------------
//
// PTS callbacks
//
// -----------------------------------------------------------------
#region PTS callbacks
///
/// UpdGetParaChange
///
///
/// OUT: kind of change
///
///
/// OUT: no changes after?
///
internal virtual void UpdGetParaChange(
out PTS.FSKCHANGE fskch,
out int fNoFurtherChanges)
{
fskch = _changeType;
fNoFurtherChanges = PTS.FromBoolean(_stopAsking);
#if TEXTPANELLAYOUTDEBUG
if (StructuralCache.CurrentFormatContext.IncrementalUpdate)
{
TextPanelDebug.Log("Para.UpdGetParaChange, Para=" + this.GetType().Name + " Change=" + _changeType.ToString(), TextPanelDebug.Category.ContentChange);
}
#endif
}
///
/// Collapse margins
///
///
/// IN: Paragraph's para client
///
///
/// IN: input margin collapsing state
///
///
/// IN: current direction (of the track, in which margin collapsing is happening)
///
///
/// IN: suppress empty space at the top of page
///
///
/// OUT: dvr, calculated based on margin collapsing state
///
internal virtual void CollapseMargin(
BaseParaClient paraClient,
MarginCollapsingState mcs,
uint fswdir,
bool suppressTopSpace,
out int dvr)
{
// Suppress top space only in paginated scenarios.
dvr = (mcs == null || (suppressTopSpace)) ? 0 : mcs.Margin;
}
///
/// Get Para Properties
///
///
/// OUT: paragraph properties
///
internal abstract void GetParaProperties(
ref PTS.FSPAP fspap);
///
/// CreateParaclient
///
///
/// OUT: opaque to PTS paragraph client
///
internal abstract void CreateParaclient(
out IntPtr pfsparaclient);
#endregion PTS callbacks
// ------------------------------------------------------------------
//
// Internal Methods
//
// ------------------------------------------------------------------
#region Internal Methods
///
/// Set update info. Those flags are used later by PTS to decide
/// if paragraph needs to be updated and when to stop asking for
/// update information.
///
///
/// Type of change within the paragraph.
///
///
/// Synchronization point is reached?
///
internal virtual void SetUpdateInfo(PTS.FSKCHANGE fskch, bool stopAsking)
{
_changeType = fskch;
_stopAsking = stopAsking;
}
///
/// Clear previously accumulated update info.
///
internal virtual void ClearUpdateInfo()
{
_changeType = PTS.FSKCHANGE.fskchNone;
_stopAsking = true;
}
///
/// Invalidate content's structural cache. Returns: 'true' if entire paragraph
/// is invalid.
///
///
/// Position to start invalidation from.
///
internal virtual bool InvalidateStructure(int startPosition)
{
Debug.Assert(ParagraphEndCharacterPosition >= startPosition);
int openEdgeCp = TextContainerHelper.GetCPFromElement(StructuralCache.TextContainer, Element, ElementEdge.BeforeStart);
return (openEdgeCp == startPosition);
}
///
/// Invalidate accumulated format caches.
///
internal virtual void InvalidateFormatCache()
{
}
///
/// Update number of characters consumed by the paragraph.
///
internal void UpdateLastFormatPositions()
{
_lastFormatCch = Cch;
}
#endregion Internal Methods
//-------------------------------------------------------------------
//
// Protected Methods
//
//--------------------------------------------------------------------
#region Protected Methods
///
/// Retrieve PTS paragraph properties.
///
///
/// Paragraph properties to initialize.
///
///
/// Ignore element properties?
///
protected void GetParaProperties(ref PTS.FSPAP fspap, bool ignoreElementProps)
{
if (!ignoreElementProps)
{
fspap.fKeepWithNext = PTS.FromBoolean(DynamicPropertyReader.GetKeepWithNext(_element));
// Can be broken only if Block.BreakPageBefore is set
fspap.fBreakPageBefore = _element is Block ? PTS.FromBoolean(StructuralCache.CurrentFormatContext.FinitePage && ((Block)_element).BreakPageBefore) : PTS.FromBoolean(false);
// Can be broken only if Block.BreakColumnBefore is set
fspap.fBreakColumnBefore = _element is Block ? PTS.FromBoolean(((Block)_element).BreakColumnBefore) : PTS.FromBoolean(false);
}
}
#endregion Protected Methods
//-------------------------------------------------------------------
//
// Properties / Fields
//
//-------------------------------------------------------------------
#region Properties / Fields
///
/// CharacterPosition at the start of paragraph.
///
internal int ParagraphStartCharacterPosition
{
get
{
// This is done here, rather than deriving for two reasons - This is special cased for text paragraph - no other
// paras should use their cps in this way, and this is also not a virtual method, so can be used from C'Tor.
if(this is TextParagraph)
{
return TextContainerHelper.GetCPFromElement(StructuralCache.TextContainer, Element, ElementEdge.AfterStart);
}
else
{
return TextContainerHelper.GetCPFromElement(StructuralCache.TextContainer, Element, ElementEdge.BeforeStart);
}
}
}
///
/// CharacterPosition at the end of paragraph. The first character
/// that does not belong to the paragraph.
///
internal int ParagraphEndCharacterPosition
{
get
{
// This is done here, rather than deriving for two reasons - This is special cased for text paragraph - no other
// paras should use their cps in this way, and this is also not a virtual method, so can be used from C'Tor.
if(this is TextParagraph)
{
return TextContainerHelper.GetCPFromElement(StructuralCache.TextContainer, Element, ElementEdge.BeforeEnd);
}
else
{
return TextContainerHelper.GetCPFromElement(StructuralCache.TextContainer, Element, ElementEdge.AfterEnd);
}
}
}
///
/// Incremental update information for the paragraph.
/// Those fields are used only during incremental update process.
///
protected PTS.FSKCHANGE _changeType;
protected bool _stopAsking;
///
/// Number of characters consumed by the paragraph.
///
internal int Cch
{
get
{
int cch = TextContainerHelper.GetCchFromElement(StructuralCache.TextContainer, Element);
// This is done here, rather than deriving for two reasons - This is special cased for text paragraph - no other
// paras should use their cps in this way, and this is also not a virtual method, so can be used from C'Tor.
if (this is TextParagraph && Element is TextElement)
{
Invariant.Assert(cch >= 2);
cch -= 2;
}
return cch;
}
}
///
/// Cch paragraph had during last format
///
internal int LastFormatCch
{
get
{
return _lastFormatCch;
}
}
protected int _lastFormatCch;
///
/// The next and previous sibling in paragraph list.
///
internal BaseParagraph Next;
internal BaseParagraph Previous;
///
/// Content's structural cache.
///
internal StructuralCache StructuralCache
{
get
{
return _structuralCache;
}
}
protected readonly StructuralCache _structuralCache;
///
/// Object associated with the paragraph.
///
internal DependencyObject Element
{
get
{
return _element;
}
}
protected readonly DependencyObject _element;
#endregion Properties / Fields
}
}
// 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.
//
// Description: BaseParagraph represents a paragraph corresponding to part
// of a text based content.
//
// History:
// 05/05/2003 : grzegorz - moving from Avalon branch.
// 10/30/2004 : grzegorz - ElementReference cleanup.
//
//---------------------------------------------------------------------------
using System;
using System.Diagnostics;
using System.Windows;
using System.Windows.Documents;
using MS.Internal.Documents;
using MS.Internal.Text;
using MS.Internal.PtsHost.UnsafeNativeMethods;
namespace MS.Internal.PtsHost
{
///
/// BaseParagraph represents a paragraph corresponding to part of a text
/// based content.
///
internal abstract class BaseParagraph : UnmanagedHandle
{
//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
///
/// Constructor.
///
///
/// Element associated with paragraph.
///
///
/// Content's structural cache
///
protected BaseParagraph(DependencyObject element, StructuralCache structuralCache)
: base(structuralCache.PtsContext)
{
_element = element;
_structuralCache = structuralCache;
_changeType = PTS.FSKCHANGE.fskchNone;
_stopAsking = false;
UpdateLastFormatPositions();
}
#endregion Constructors
// ------------------------------------------------------------------
//
// PTS callbacks
//
// -----------------------------------------------------------------
#region PTS callbacks
///
/// UpdGetParaChange
///
///
/// OUT: kind of change
///
///
/// OUT: no changes after?
///
internal virtual void UpdGetParaChange(
out PTS.FSKCHANGE fskch,
out int fNoFurtherChanges)
{
fskch = _changeType;
fNoFurtherChanges = PTS.FromBoolean(_stopAsking);
#if TEXTPANELLAYOUTDEBUG
if (StructuralCache.CurrentFormatContext.IncrementalUpdate)
{
TextPanelDebug.Log("Para.UpdGetParaChange, Para=" + this.GetType().Name + " Change=" + _changeType.ToString(), TextPanelDebug.Category.ContentChange);
}
#endif
}
///
/// Collapse margins
///
///
/// IN: Paragraph's para client
///
///
/// IN: input margin collapsing state
///
///
/// IN: current direction (of the track, in which margin collapsing is happening)
///
///
/// IN: suppress empty space at the top of page
///
///
/// OUT: dvr, calculated based on margin collapsing state
///
internal virtual void CollapseMargin(
BaseParaClient paraClient,
MarginCollapsingState mcs,
uint fswdir,
bool suppressTopSpace,
out int dvr)
{
// Suppress top space only in paginated scenarios.
dvr = (mcs == null || (suppressTopSpace)) ? 0 : mcs.Margin;
}
///
/// Get Para Properties
///
///
/// OUT: paragraph properties
///
internal abstract void GetParaProperties(
ref PTS.FSPAP fspap);
///
/// CreateParaclient
///
///
/// OUT: opaque to PTS paragraph client
///
internal abstract void CreateParaclient(
out IntPtr pfsparaclient);
#endregion PTS callbacks
// ------------------------------------------------------------------
//
// Internal Methods
//
// ------------------------------------------------------------------
#region Internal Methods
///
/// Set update info. Those flags are used later by PTS to decide
/// if paragraph needs to be updated and when to stop asking for
/// update information.
///
///
/// Type of change within the paragraph.
///
///
/// Synchronization point is reached?
///
internal virtual void SetUpdateInfo(PTS.FSKCHANGE fskch, bool stopAsking)
{
_changeType = fskch;
_stopAsking = stopAsking;
}
///
/// Clear previously accumulated update info.
///
internal virtual void ClearUpdateInfo()
{
_changeType = PTS.FSKCHANGE.fskchNone;
_stopAsking = true;
}
///
/// Invalidate content's structural cache. Returns: 'true' if entire paragraph
/// is invalid.
///
///
/// Position to start invalidation from.
///
internal virtual bool InvalidateStructure(int startPosition)
{
Debug.Assert(ParagraphEndCharacterPosition >= startPosition);
int openEdgeCp = TextContainerHelper.GetCPFromElement(StructuralCache.TextContainer, Element, ElementEdge.BeforeStart);
return (openEdgeCp == startPosition);
}
///
/// Invalidate accumulated format caches.
///
internal virtual void InvalidateFormatCache()
{
}
///
/// Update number of characters consumed by the paragraph.
///
internal void UpdateLastFormatPositions()
{
_lastFormatCch = Cch;
}
#endregion Internal Methods
//-------------------------------------------------------------------
//
// Protected Methods
//
//--------------------------------------------------------------------
#region Protected Methods
///
/// Retrieve PTS paragraph properties.
///
///
/// Paragraph properties to initialize.
///
///
/// Ignore element properties?
///
protected void GetParaProperties(ref PTS.FSPAP fspap, bool ignoreElementProps)
{
if (!ignoreElementProps)
{
fspap.fKeepWithNext = PTS.FromBoolean(DynamicPropertyReader.GetKeepWithNext(_element));
// Can be broken only if Block.BreakPageBefore is set
fspap.fBreakPageBefore = _element is Block ? PTS.FromBoolean(StructuralCache.CurrentFormatContext.FinitePage && ((Block)_element).BreakPageBefore) : PTS.FromBoolean(false);
// Can be broken only if Block.BreakColumnBefore is set
fspap.fBreakColumnBefore = _element is Block ? PTS.FromBoolean(((Block)_element).BreakColumnBefore) : PTS.FromBoolean(false);
}
}
#endregion Protected Methods
//-------------------------------------------------------------------
//
// Properties / Fields
//
//-------------------------------------------------------------------
#region Properties / Fields
///
/// CharacterPosition at the start of paragraph.
///
internal int ParagraphStartCharacterPosition
{
get
{
// This is done here, rather than deriving for two reasons - This is special cased for text paragraph - no other
// paras should use their cps in this way, and this is also not a virtual method, so can be used from C'Tor.
if(this is TextParagraph)
{
return TextContainerHelper.GetCPFromElement(StructuralCache.TextContainer, Element, ElementEdge.AfterStart);
}
else
{
return TextContainerHelper.GetCPFromElement(StructuralCache.TextContainer, Element, ElementEdge.BeforeStart);
}
}
}
///
/// CharacterPosition at the end of paragraph. The first character
/// that does not belong to the paragraph.
///
internal int ParagraphEndCharacterPosition
{
get
{
// This is done here, rather than deriving for two reasons - This is special cased for text paragraph - no other
// paras should use their cps in this way, and this is also not a virtual method, so can be used from C'Tor.
if(this is TextParagraph)
{
return TextContainerHelper.GetCPFromElement(StructuralCache.TextContainer, Element, ElementEdge.BeforeEnd);
}
else
{
return TextContainerHelper.GetCPFromElement(StructuralCache.TextContainer, Element, ElementEdge.AfterEnd);
}
}
}
///
/// Incremental update information for the paragraph.
/// Those fields are used only during incremental update process.
///
protected PTS.FSKCHANGE _changeType;
protected bool _stopAsking;
///
/// Number of characters consumed by the paragraph.
///
internal int Cch
{
get
{
int cch = TextContainerHelper.GetCchFromElement(StructuralCache.TextContainer, Element);
// This is done here, rather than deriving for two reasons - This is special cased for text paragraph - no other
// paras should use their cps in this way, and this is also not a virtual method, so can be used from C'Tor.
if (this is TextParagraph && Element is TextElement)
{
Invariant.Assert(cch >= 2);
cch -= 2;
}
return cch;
}
}
///
/// Cch paragraph had during last format
///
internal int LastFormatCch
{
get
{
return _lastFormatCch;
}
}
protected int _lastFormatCch;
///
/// The next and previous sibling in paragraph list.
///
internal BaseParagraph Next;
internal BaseParagraph Previous;
///
/// Content's structural cache.
///
internal StructuralCache StructuralCache
{
get
{
return _structuralCache;
}
}
protected readonly StructuralCache _structuralCache;
///
/// Object associated with the paragraph.
///
internal DependencyObject Element
{
get
{
return _element;
}
}
protected readonly DependencyObject _element;
#endregion Properties / Fields
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DbConnectionClosed.cs
- CharacterBuffer.cs
- DateTimeConverter2.cs
- BaseServiceProvider.cs
- ApplicationGesture.cs
- WorkflowServiceNamespace.cs
- DbConnectionPoolIdentity.cs
- HostingEnvironmentWrapper.cs
- ResolveNameEventArgs.cs
- BookmarkTable.cs
- BrushConverter.cs
- BitStream.cs
- ProtocolInformationWriter.cs
- PassportAuthentication.cs
- HintTextMaxWidthConverter.cs
- StringArrayConverter.cs
- XmlSignificantWhitespace.cs
- NamedPipeConnectionPoolSettings.cs
- CodeIterationStatement.cs
- remotingproxy.cs
- ViewEvent.cs
- PropertyGroupDescription.cs
- SafeReversePInvokeHandle.cs
- WebPartManagerInternals.cs
- SchemaExporter.cs
- LocalizationComments.cs
- ConstNode.cs
- ColorDialog.cs
- PropertyChangedEventManager.cs
- FontFaceLayoutInfo.cs
- XmlSchemaAny.cs
- RemotingException.cs
- PropertyFilter.cs
- AtomServiceDocumentSerializer.cs
- Line.cs
- OutputScopeManager.cs
- FieldDescriptor.cs
- TraceHwndHost.cs
- CssStyleCollection.cs
- RangeValidator.cs
- LongPath.cs
- SimpleRecyclingCache.cs
- BufferedStream.cs
- TableProviderWrapper.cs
- RequestQueue.cs
- SiteOfOriginPart.cs
- WindowsRegion.cs
- EdmProperty.cs
- Compiler.cs
- ElementsClipboardData.cs
- ConfigWriter.cs
- Column.cs
- SqlFormatter.cs
- ColumnCollection.cs
- BinaryParser.cs
- EpmTargetTree.cs
- _SingleItemRequestCache.cs
- CaseInsensitiveOrdinalStringComparer.cs
- IndexerNameAttribute.cs
- HelpInfo.cs
- AesManaged.cs
- EmptyEnumerator.cs
- BatchParser.cs
- AccessedThroughPropertyAttribute.cs
- DoubleKeyFrameCollection.cs
- Win32Native.cs
- SelectionProviderWrapper.cs
- CommonRemoteMemoryBlock.cs
- CallInfo.cs
- XmlIncludeAttribute.cs
- WebHttpDispatchOperationSelector.cs
- DecimalMinMaxAggregationOperator.cs
- SafeHandle.cs
- DesignerDataSourceView.cs
- RedistVersionInfo.cs
- TextModifier.cs
- PersistenceTypeAttribute.cs
- TextRangeAdaptor.cs
- CheckBox.cs
- SoapWriter.cs
- RewritingSimplifier.cs
- ScriptControlDescriptor.cs
- Converter.cs
- MouseEventArgs.cs
- NamespaceCollection.cs
- Delegate.cs
- DbProviderConfigurationHandler.cs
- HostSecurityManager.cs
- XmlKeywords.cs
- UntypedNullExpression.cs
- ContentPropertyAttribute.cs
- FileSystemWatcher.cs
- ButtonBaseAutomationPeer.cs
- Point.cs
- CodeMethodInvokeExpression.cs
- JulianCalendar.cs
- ImageListImageEditor.cs
- XmlReturnWriter.cs
- ChildTable.cs
- UserMapPath.cs