Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Framework / System / Windows / Documents / FixedSOMSemanticBox.cs / 1 / FixedSOMSemanticBox.cs
/*++
File: FixedSOMSemanticBox.cs
Copyright (C) 2005 Microsoft Corporation. All rights reserved.
Description:
This class is the abstract base class for all the objects in SOM. It consists of a bounding rectangle, and
implements IComparable interface to figure out content ordering on the page
History:
05/17/2005: agurcan - Created
--*/
namespace System.Windows.Documents
{
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.Windows.Media;
internal abstract class FixedSOMSemanticBox : IComparable
{
//--------------------------------------------------------------------
//
// Constructors
//
//---------------------------------------------------------------------
#region Constructors
public FixedSOMSemanticBox()
{
_boundingRect = Rect.Empty;
}
public FixedSOMSemanticBox(Rect boundingRect)
{
_boundingRect = boundingRect;
}
#endregion Constructors
//-------------------------------------------------------------------
//
// Public Properties
//
//---------------------------------------------------------------------
#region Public Properties
public Rect BoundingRect
{
get
{
return _boundingRect;
}
set
{
_boundingRect = value;
}
}
#endregion Public Properties
//--------------------------------------------------------------------
//
// Public Methods
//
//---------------------------------------------------------------------
#region Public Methods
#if DEBUG
//For visualization purposes
public abstract void Render(DrawingContext dc, string label, DrawDebugVisual debugVisuals) ;
public void RenderLabel(DrawingContext dc, string label)
{
CultureInfo EnglishCulture = CultureInfo.GetCultureInfoByIetfLanguageTag("en-US");
FormattedText ft = new FormattedText(label,
EnglishCulture,
FlowDirection.LeftToRight,
new Typeface("Arial"),
10,
Brushes.White);
Point labelLocation = new Point(_boundingRect.Left-25, (_boundingRect.Bottom + _boundingRect.Top)/2 - 10);
Geometry geom = ft.BuildHighlightGeometry(labelLocation);
Pen backgroundPen = new Pen(Brushes.Black,1);
dc.DrawGeometry(Brushes.Black, backgroundPen, geom);
dc.DrawText(ft, labelLocation);
}
#endif
public virtual void SetRTFProperties(FixedElement element)
{
}
public int CompareTo(object o)
{
Debug.Assert(o != null);
if (!(o is FixedSOMSemanticBox))
{
throw new ArgumentException(SR.Get(SRID.UnexpectedParameterType, o.GetType(), typeof(FixedSOMSemanticBox)), "o");
}
SpatialComparison compareHor = _CompareHorizontal(o as FixedSOMSemanticBox, false);
SpatialComparison compareVer = _CompareVertical(o as FixedSOMSemanticBox);
Debug.Assert(compareHor != SpatialComparison.None && compareVer != SpatialComparison.None);
int result;
if (compareHor == SpatialComparison.Equal && compareVer == SpatialComparison.Equal)
{
result = 0;
}
else if (compareHor == SpatialComparison.Equal)
{
if (compareVer == SpatialComparison.Before || compareVer == SpatialComparison.OverlapBefore)
{
result = -1;
}
else
{
result = 1;
}
}
else if (compareVer == SpatialComparison.Equal)
{
if (compareHor == SpatialComparison.Before || compareHor == SpatialComparison.OverlapBefore)
{
result = -1;
}
else
{
result = 1;
}
}
else if (compareHor == SpatialComparison.Before)
{
result = -1;
}
else if (compareHor == SpatialComparison.After)
{
result = 1;
}
else
{
//Objects overlap
if (compareVer == SpatialComparison.Before)
{
result = -1;
}
else if (compareVer == SpatialComparison.After)
{
result = 1;
}
//These objects intersect.
else if (compareHor == SpatialComparison.OverlapBefore)
{
result = -1;
}
else
{
result = 1;
}
}
return result;
}
#endregion Abstract Methods
//--------------------------------------------------------------------
//
// IComparable
//
//----------------------------------------------------------------------
#region IComparable Methods
int IComparable.CompareTo(object o)
{
return this.CompareTo(o);
}
#endregion IComparable Methods
//-------------------------------------------------------------------
//
// Protected Methods
//
//----------------------------------------------------------------------
#region Private Methods
//Method that compares horizontally according to specific reading order
protected SpatialComparison _CompareHorizontal(FixedSOMSemanticBox otherBox, bool RTL)
{
SpatialComparison result = SpatialComparison.None;
Rect thisRect = this.BoundingRect;
Rect otherRect = otherBox.BoundingRect;
double thisRectRefX = RTL ? thisRect.Right : thisRect.Left;
double otherRectRefX = RTL ? otherRect.Right : otherRect.Left;
if (thisRectRefX == otherRectRefX)
{
result = SpatialComparison.Equal;
}
//Easiest way: calculate as if it's LTR and invert the result if RTL
else if (thisRect.Right < otherRect.Left)
{
//Clearly before the other object
result = SpatialComparison.Before;
}
else if (otherRect.Right < thisRect.Left)
{
//Clearly after the other object
result = SpatialComparison.After;
}
else
{
double overlap = Math.Abs(thisRectRefX - otherRectRefX);
double longerWidth = thisRect.Width > otherRect.Width ? thisRect.Width : otherRect.Width;
if (overlap/longerWidth < 0.1)
{
//If less than 10% overlap then assume these are equal in horizontal comparison
result = SpatialComparison.Equal;
}
//Objects overlap
else if (thisRect.Left < otherRect.Left)
{
result = SpatialComparison.OverlapBefore;
}
else
{
result = SpatialComparison.OverlapAfter;
}
}
if (RTL && result != SpatialComparison.Equal)
{
result = _InvertSpatialComparison(result);
}
return result;
}
//Method that compares horizontally according to specific reading order
//In the future we should take into account the document language and plug it into this algorithm
protected SpatialComparison _CompareVertical(FixedSOMSemanticBox otherBox)
{
SpatialComparison result = SpatialComparison.None;
Rect thisRect = this.BoundingRect;
Rect otherRect = otherBox.BoundingRect;
if (thisRect.Top == otherRect.Top)
{
result = SpatialComparison.Equal;
}
else if (thisRect.Bottom <= otherRect.Top)
{
//Clearly before the other object
result = SpatialComparison.Before;
}
else if (otherRect.Bottom <= thisRect.Top)
{
//Clearly after the other object
result = SpatialComparison.After;
}
else
{
//Objects overlap
if (thisRect.Top < otherRect.Top)
{
result = SpatialComparison.OverlapBefore;
}
else
{
result = SpatialComparison.OverlapAfter;
}
}
return result;
}
protected int _SpatialToAbsoluteComparison(SpatialComparison comparison)
{
int result=0;
switch (comparison)
{
case SpatialComparison.Before:
case SpatialComparison.OverlapBefore:
result = -1;
break;
case SpatialComparison.After:
case SpatialComparison.OverlapAfter:
result = 1;
break;
case SpatialComparison.Equal:
result = 0;
break;
default:
Debug.Assert(false);
break;
}
return result;
}
protected SpatialComparison _InvertSpatialComparison(SpatialComparison comparison)
{
SpatialComparison result = comparison;
switch (comparison)
{
case SpatialComparison.Before:
result = SpatialComparison.After;
break;
case SpatialComparison.After:
result = SpatialComparison.Before;
break;
case SpatialComparison.OverlapBefore:
result = SpatialComparison.OverlapAfter;
break;
case SpatialComparison.OverlapAfter:
result = SpatialComparison.OverlapBefore;
break;
default:
break;
}
return result;
}
#endregion Protected Methods
#region enums
protected enum SpatialComparison
{
None =0,
Before,
OverlapBefore,
Equal,
OverlapAfter,
After
};
#endregion enums
//-------------------------------------------------------------------
//
// Protected Fields
//
//---------------------------------------------------------------------
#region Protected Fields
protected Rect _boundingRect;
#endregion Protected Fields
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
/*++
File: FixedSOMSemanticBox.cs
Copyright (C) 2005 Microsoft Corporation. All rights reserved.
Description:
This class is the abstract base class for all the objects in SOM. It consists of a bounding rectangle, and
implements IComparable interface to figure out content ordering on the page
History:
05/17/2005: agurcan - Created
--*/
namespace System.Windows.Documents
{
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.Windows.Media;
internal abstract class FixedSOMSemanticBox : IComparable
{
//--------------------------------------------------------------------
//
// Constructors
//
//---------------------------------------------------------------------
#region Constructors
public FixedSOMSemanticBox()
{
_boundingRect = Rect.Empty;
}
public FixedSOMSemanticBox(Rect boundingRect)
{
_boundingRect = boundingRect;
}
#endregion Constructors
//-------------------------------------------------------------------
//
// Public Properties
//
//---------------------------------------------------------------------
#region Public Properties
public Rect BoundingRect
{
get
{
return _boundingRect;
}
set
{
_boundingRect = value;
}
}
#endregion Public Properties
//--------------------------------------------------------------------
//
// Public Methods
//
//---------------------------------------------------------------------
#region Public Methods
#if DEBUG
//For visualization purposes
public abstract void Render(DrawingContext dc, string label, DrawDebugVisual debugVisuals) ;
public void RenderLabel(DrawingContext dc, string label)
{
CultureInfo EnglishCulture = CultureInfo.GetCultureInfoByIetfLanguageTag("en-US");
FormattedText ft = new FormattedText(label,
EnglishCulture,
FlowDirection.LeftToRight,
new Typeface("Arial"),
10,
Brushes.White);
Point labelLocation = new Point(_boundingRect.Left-25, (_boundingRect.Bottom + _boundingRect.Top)/2 - 10);
Geometry geom = ft.BuildHighlightGeometry(labelLocation);
Pen backgroundPen = new Pen(Brushes.Black,1);
dc.DrawGeometry(Brushes.Black, backgroundPen, geom);
dc.DrawText(ft, labelLocation);
}
#endif
public virtual void SetRTFProperties(FixedElement element)
{
}
public int CompareTo(object o)
{
Debug.Assert(o != null);
if (!(o is FixedSOMSemanticBox))
{
throw new ArgumentException(SR.Get(SRID.UnexpectedParameterType, o.GetType(), typeof(FixedSOMSemanticBox)), "o");
}
SpatialComparison compareHor = _CompareHorizontal(o as FixedSOMSemanticBox, false);
SpatialComparison compareVer = _CompareVertical(o as FixedSOMSemanticBox);
Debug.Assert(compareHor != SpatialComparison.None && compareVer != SpatialComparison.None);
int result;
if (compareHor == SpatialComparison.Equal && compareVer == SpatialComparison.Equal)
{
result = 0;
}
else if (compareHor == SpatialComparison.Equal)
{
if (compareVer == SpatialComparison.Before || compareVer == SpatialComparison.OverlapBefore)
{
result = -1;
}
else
{
result = 1;
}
}
else if (compareVer == SpatialComparison.Equal)
{
if (compareHor == SpatialComparison.Before || compareHor == SpatialComparison.OverlapBefore)
{
result = -1;
}
else
{
result = 1;
}
}
else if (compareHor == SpatialComparison.Before)
{
result = -1;
}
else if (compareHor == SpatialComparison.After)
{
result = 1;
}
else
{
//Objects overlap
if (compareVer == SpatialComparison.Before)
{
result = -1;
}
else if (compareVer == SpatialComparison.After)
{
result = 1;
}
//These objects intersect.
else if (compareHor == SpatialComparison.OverlapBefore)
{
result = -1;
}
else
{
result = 1;
}
}
return result;
}
#endregion Abstract Methods
//--------------------------------------------------------------------
//
// IComparable
//
//----------------------------------------------------------------------
#region IComparable Methods
int IComparable.CompareTo(object o)
{
return this.CompareTo(o);
}
#endregion IComparable Methods
//-------------------------------------------------------------------
//
// Protected Methods
//
//----------------------------------------------------------------------
#region Private Methods
//Method that compares horizontally according to specific reading order
protected SpatialComparison _CompareHorizontal(FixedSOMSemanticBox otherBox, bool RTL)
{
SpatialComparison result = SpatialComparison.None;
Rect thisRect = this.BoundingRect;
Rect otherRect = otherBox.BoundingRect;
double thisRectRefX = RTL ? thisRect.Right : thisRect.Left;
double otherRectRefX = RTL ? otherRect.Right : otherRect.Left;
if (thisRectRefX == otherRectRefX)
{
result = SpatialComparison.Equal;
}
//Easiest way: calculate as if it's LTR and invert the result if RTL
else if (thisRect.Right < otherRect.Left)
{
//Clearly before the other object
result = SpatialComparison.Before;
}
else if (otherRect.Right < thisRect.Left)
{
//Clearly after the other object
result = SpatialComparison.After;
}
else
{
double overlap = Math.Abs(thisRectRefX - otherRectRefX);
double longerWidth = thisRect.Width > otherRect.Width ? thisRect.Width : otherRect.Width;
if (overlap/longerWidth < 0.1)
{
//If less than 10% overlap then assume these are equal in horizontal comparison
result = SpatialComparison.Equal;
}
//Objects overlap
else if (thisRect.Left < otherRect.Left)
{
result = SpatialComparison.OverlapBefore;
}
else
{
result = SpatialComparison.OverlapAfter;
}
}
if (RTL && result != SpatialComparison.Equal)
{
result = _InvertSpatialComparison(result);
}
return result;
}
//Method that compares horizontally according to specific reading order
//In the future we should take into account the document language and plug it into this algorithm
protected SpatialComparison _CompareVertical(FixedSOMSemanticBox otherBox)
{
SpatialComparison result = SpatialComparison.None;
Rect thisRect = this.BoundingRect;
Rect otherRect = otherBox.BoundingRect;
if (thisRect.Top == otherRect.Top)
{
result = SpatialComparison.Equal;
}
else if (thisRect.Bottom <= otherRect.Top)
{
//Clearly before the other object
result = SpatialComparison.Before;
}
else if (otherRect.Bottom <= thisRect.Top)
{
//Clearly after the other object
result = SpatialComparison.After;
}
else
{
//Objects overlap
if (thisRect.Top < otherRect.Top)
{
result = SpatialComparison.OverlapBefore;
}
else
{
result = SpatialComparison.OverlapAfter;
}
}
return result;
}
protected int _SpatialToAbsoluteComparison(SpatialComparison comparison)
{
int result=0;
switch (comparison)
{
case SpatialComparison.Before:
case SpatialComparison.OverlapBefore:
result = -1;
break;
case SpatialComparison.After:
case SpatialComparison.OverlapAfter:
result = 1;
break;
case SpatialComparison.Equal:
result = 0;
break;
default:
Debug.Assert(false);
break;
}
return result;
}
protected SpatialComparison _InvertSpatialComparison(SpatialComparison comparison)
{
SpatialComparison result = comparison;
switch (comparison)
{
case SpatialComparison.Before:
result = SpatialComparison.After;
break;
case SpatialComparison.After:
result = SpatialComparison.Before;
break;
case SpatialComparison.OverlapBefore:
result = SpatialComparison.OverlapAfter;
break;
case SpatialComparison.OverlapAfter:
result = SpatialComparison.OverlapBefore;
break;
default:
break;
}
return result;
}
#endregion Protected Methods
#region enums
protected enum SpatialComparison
{
None =0,
Before,
OverlapBefore,
Equal,
OverlapAfter,
After
};
#endregion enums
//-------------------------------------------------------------------
//
// Protected Fields
//
//---------------------------------------------------------------------
#region Protected Fields
protected Rect _boundingRect;
#endregion Protected 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
- WS2007FederationHttpBindingCollectionElement.cs
- ValidationEventArgs.cs
- WebHeaderCollection.cs
- ImplicitInputBrush.cs
- TreeNodeStyle.cs
- ShutDownListener.cs
- NavigationProgressEventArgs.cs
- TypeUtil.cs
- BinarySerializer.cs
- HandledMouseEvent.cs
- GeometryGroup.cs
- DataGridViewColumnStateChangedEventArgs.cs
- DataProtection.cs
- DefaultPrintController.cs
- AbsoluteQuery.cs
- StringToken.cs
- KeyboardDevice.cs
- Label.cs
- TypeElement.cs
- TextServicesPropertyRanges.cs
- SizeF.cs
- PrintDialogException.cs
- BinaryConverter.cs
- BitmapImage.cs
- ToolBar.cs
- RelationalExpressions.cs
- SerializationInfoEnumerator.cs
- ComboBoxRenderer.cs
- Int32KeyFrameCollection.cs
- NativeMethods.cs
- Models.cs
- fixedPageContentExtractor.cs
- ButtonBase.cs
- MultilineStringEditor.cs
- WCFModelStrings.Designer.cs
- DataPagerFieldCollection.cs
- Bitmap.cs
- ZipIOCentralDirectoryFileHeader.cs
- XmlArrayItemAttribute.cs
- ResourceReferenceExpressionConverter.cs
- CurrencyWrapper.cs
- ZoneMembershipCondition.cs
- XmlAttribute.cs
- TemplateBindingExtensionConverter.cs
- SqlDataReader.cs
- PropertyReference.cs
- StylusCollection.cs
- XmlFormatReaderGenerator.cs
- StatusBarDrawItemEvent.cs
- PropertyNames.cs
- InternalUserCancelledException.cs
- MethodBuilderInstantiation.cs
- figurelengthconverter.cs
- DesignTimeSiteMapProvider.cs
- OdbcTransaction.cs
- InternalTypeHelper.cs
- InstanceLockedException.cs
- ClickablePoint.cs
- CorrelationValidator.cs
- Command.cs
- propertytag.cs
- WizardPanel.cs
- SelectionGlyph.cs
- ToolStripButton.cs
- GeneralTransform3DCollection.cs
- PreProcessInputEventArgs.cs
- MessageQueuePermissionAttribute.cs
- FontStyleConverter.cs
- BitStream.cs
- SqlStream.cs
- TextRangeProviderWrapper.cs
- CheckBoxAutomationPeer.cs
- Size3D.cs
- InstanceDataCollectionCollection.cs
- RoutedPropertyChangedEventArgs.cs
- ToolboxComponentsCreatedEventArgs.cs
- ProxyGenerationError.cs
- XamlParser.cs
- SessionSwitchEventArgs.cs
- ServiceOperation.cs
- Rect.cs
- MetadataSource.cs
- Transactions.cs
- DCSafeHandle.cs
- OptimizedTemplateContentHelper.cs
- CopyOnWriteList.cs
- RoleManagerSection.cs
- ConfigXmlCDataSection.cs
- X509Certificate.cs
- selecteditemcollection.cs
- ExtensionQuery.cs
- MouseActionConverter.cs
- MessagePropertyVariants.cs
- ChannelAcceptor.cs
- DictionaryEntry.cs
- DetailsViewInsertEventArgs.cs
- ListManagerBindingsCollection.cs
- PropertyTabChangedEvent.cs
- login.cs
- ListBoxAutomationPeer.cs