Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / 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
- SqlDataSourceConfigureSelectPanel.cs
- DesignerAutoFormatStyle.cs
- TypedTableGenerator.cs
- SystemException.cs
- CachedPathData.cs
- httpapplicationstate.cs
- CodeEntryPointMethod.cs
- ScheduleChanges.cs
- CharacterBufferReference.cs
- CompositeKey.cs
- DesignerTransactionCloseEvent.cs
- XamlSerializerUtil.cs
- UidManager.cs
- MsmqDiagnostics.cs
- BordersPage.cs
- Size.cs
- DrawingState.cs
- CanonicalFormWriter.cs
- Menu.cs
- ExecutedRoutedEventArgs.cs
- Point4DConverter.cs
- BitmapEffectInput.cs
- SqlCacheDependencyDatabase.cs
- SemaphoreFullException.cs
- URI.cs
- CommonProperties.cs
- RequestCacheValidator.cs
- FilterException.cs
- XpsDigitalSignature.cs
- XmlStreamStore.cs
- CompilerScope.cs
- RealizedColumnsBlock.cs
- WebPartUtil.cs
- TrustLevel.cs
- ProtocolsSection.cs
- IndexingContentUnit.cs
- SelectManyQueryOperator.cs
- HtmlInputButton.cs
- SqlResolver.cs
- AudioFormatConverter.cs
- FlowDocumentPage.cs
- DataServiceEntityAttribute.cs
- FocusManager.cs
- StringInfo.cs
- DetailsViewPageEventArgs.cs
- SafeFileMappingHandle.cs
- TdsEnums.cs
- LineServices.cs
- SchemaImporterExtensionsSection.cs
- MessageDecoder.cs
- XmlChildEnumerator.cs
- InkCollectionBehavior.cs
- DataControlFieldCollection.cs
- ComponentSerializationService.cs
- MediaEntryAttribute.cs
- CodeNamespaceImport.cs
- ToolStrip.cs
- UnsafeNativeMethodsPenimc.cs
- ExtenderProvidedPropertyAttribute.cs
- FramingDecoders.cs
- ComponentResourceKey.cs
- RegexCaptureCollection.cs
- ResourceReferenceExpressionConverter.cs
- AdPostCacheSubstitution.cs
- MarkupExtensionParser.cs
- AsyncCompletedEventArgs.cs
- DocumentPageView.cs
- PackageDocument.cs
- CodeDefaultValueExpression.cs
- EmbeddedMailObject.cs
- RtfNavigator.cs
- GridView.cs
- ReflectionHelper.cs
- DataGridRow.cs
- SolidColorBrush.cs
- EventLevel.cs
- OpCellTreeNode.cs
- CodeCommentStatementCollection.cs
- CodeGotoStatement.cs
- DataGridViewColumnCollection.cs
- RuntimeVariableList.cs
- _IPv6Address.cs
- Table.cs
- CodeGroup.cs
- NetCodeGroup.cs
- DependencyObject.cs
- FormatConvertedBitmap.cs
- ExecutionEngineException.cs
- EdmScalarPropertyAttribute.cs
- Point3DCollectionConverter.cs
- Types.cs
- ViewManager.cs
- WindowsMenu.cs
- BuiltInExpr.cs
- ContextInformation.cs
- TcpClientChannel.cs
- Canvas.cs
- LineSegment.cs
- IDataContractSurrogate.cs
- QuotedPairReader.cs