/// <summary>Ancillary function of NextContentUnit(). Create new chunk, taking _contextStack into
/// account, and updating it if needed.</summary>
private IndexingContentUnit BuildIndexingContentUnit(string text, uint lcid)
{
CHUNK_BREAKTYPE breakType = CHUNK_BREAKTYPE.CHUNK_NO_BREAK;
// If a paragraph break is expected, reflect this in the new chunk.
if (_expectingBlockStart)
{
breakType = CHUNK_BREAKTYPE.CHUNK_EOP;
if (_returnCanonicalParagraphBreaks)
{
text = _paragraphSeparator + text;
}
}
if (_indexingContentUnit == null)
{
_indexingContentUnit = new IndexingContentUnit(text, AllocateChunkID(), breakType, _propSpec, lcid);
}
else
{
// Optimization: reuse indexing content unit.
_indexingContentUnit.InitIndexingContentUnit(text, AllocateChunkID(), breakType, _propSpec, lcid);
}
// Until proven separated (by the occurrence of a block tag), right neighbors are contiguous.
_expectingBlockStart = false;
return(_indexingContentUnit);
}
// Token: 0x06006C4A RID: 27722 RVA: 0x001F3118 File Offset: 0x001F1318
private IndexingContentUnit HandleTextData()
{
ContentDescriptor contentDescriptor = this.TopOfStack();
if (contentDescriptor != null)
{
IndexingContentUnit result = this.BuildIndexingContentUnit(this._xamlReader.Value, this.GetCurrentLcid());
this._xamlReader.Read();
return(result);
}
this._xamlReader.Read();
return(null);
}
///<summary>
/// If current token is a text element,
/// assume it can be part of its parent's content and return a chunk.
///</summary>
///<remarks>
/// Ancillary function of NextContentUnit.
///</remarks>
private IndexingContentUnit HandleTextData()
{
ContentDescriptor topOfStack = TopOfStack();
if (topOfStack != null)
{
// The descendants of elements with HasIndexableContent set to false get skipped.
Debug.Assert(topOfStack.HasIndexableContent);
// Return a chunk with appropriate block-break information.
IndexingContentUnit result = BuildIndexingContentUnit(_xamlReader.Value, GetCurrentLcid());
_xamlReader.Read(); // Move past data just processed.
return(result);
}
else
{
// Bad Xaml (no top-level element). The Xaml filter should at some point raise an exception.
// Just to be safe, ignore all content when in this state.
_xamlReader.Read(); // Skip data.
return(null);
}
}
// Token: 0x06006C4B RID: 27723 RVA: 0x001F3164 File Offset: 0x001F1364
private IndexingContentUnit HandleElementStart()
{
ElementTableKey elementTableKey = new ElementTableKey(this._xamlReader.NamespaceURI, this._xamlReader.LocalName);
string a;
if (this.IsPrefixedPropertyName(elementTableKey.BaseName, out a))
{
ContentDescriptor contentDescriptor = this.TopOfStack();
if (contentDescriptor == null)
{
this.SkipCurrentElement();
return(null);
}
bool flag = elementTableKey.XmlNamespace.Equals(ElementTableKey.XamlNamespace, StringComparison.Ordinal) && (a == contentDescriptor.ContentProp || a == contentDescriptor.TitleProp);
if (!flag)
{
this.SkipCurrentElement();
return(null);
}
this.Push(new ContentDescriptor(flag, this.TopOfStack().IsInline, string.Empty, null));
this._xamlReader.Read();
return(null);
}
else
{
bool flag2;
IndexingContentUnit indexingContentUnit = this.HandleFixedFormatTag(elementTableKey, out flag2);
if (flag2)
{
return(indexingContentUnit);
}
Invariant.Assert(indexingContentUnit == null);
ContentDescriptor contentDescriptor2 = (ContentDescriptor)this._xamlElementContentDescriptorDictionary[elementTableKey];
if (contentDescriptor2 == null)
{
if (elementTableKey.XmlNamespace.Equals(ElementTableKey.XamlNamespace, StringComparison.Ordinal))
{
contentDescriptor2 = this._defaultContentDescriptor;
}
else if (elementTableKey.XmlNamespace.Equals("http://schemas.microsoft.com/winfx/2006/xaml", StringComparison.Ordinal))
{
contentDescriptor2 = this._nonIndexableElementDescriptor;
}
else
{
contentDescriptor2 = this.GetContentInformationAboutCustomElement(elementTableKey);
}
this._xamlElementContentDescriptorDictionary.Add(elementTableKey, contentDescriptor2);
}
if (!contentDescriptor2.HasIndexableContent)
{
this.SkipCurrentElement();
return(null);
}
if (contentDescriptor2.TitleProp != null && (this._attributesToIgnore & XamlFilter.AttributesToIgnore.Title) == XamlFilter.AttributesToIgnore.None)
{
string propertyAsAttribute = this.GetPropertyAsAttribute(contentDescriptor2.TitleProp);
if (propertyAsAttribute != null && propertyAsAttribute.Length > 0)
{
this._attributesToIgnore |= XamlFilter.AttributesToIgnore.Title;
this._expectingBlockStart = true;
IndexingContentUnit result = this.BuildIndexingContentUnit(propertyAsAttribute, this.GetCurrentLcid());
this._expectingBlockStart = true;
return(result);
}
}
if (contentDescriptor2.ContentProp != null && (this._attributesToIgnore & XamlFilter.AttributesToIgnore.Content) == XamlFilter.AttributesToIgnore.None)
{
string propertyAsAttribute2 = this.GetPropertyAsAttribute(contentDescriptor2.ContentProp);
if (propertyAsAttribute2 != null && propertyAsAttribute2.Length > 0)
{
this._attributesToIgnore |= XamlFilter.AttributesToIgnore.Content;
if (!contentDescriptor2.IsInline)
{
this._expectingBlockStart = true;
}
IndexingContentUnit result2 = this.BuildIndexingContentUnit(propertyAsAttribute2, this.GetCurrentLcid());
this._expectingBlockStart = !contentDescriptor2.IsInline;
return(result2);
}
}
this._attributesToIgnore = XamlFilter.AttributesToIgnore.None;
if (this._xamlReader.IsEmptyElement)
{
if (!contentDescriptor2.IsInline)
{
this._expectingBlockStart = true;
}
this._xamlReader.Read();
return(null);
}
this.Push(contentDescriptor2);
this._xamlReader.Read();
return(null);
}
}
// Token: 0x06006C46 RID: 27718 RVA: 0x001F2F6C File Offset: 0x001F116C
internal IndexingContentUnit NextContentUnit()
{
IndexingContentUnit indexingContentUnit = null;
while (indexingContentUnit == null)
{
if (this._filterState == XamlFilter.FilterState.UseContentExtractor)
{
if (!this._fixedPageContentExtractor.AtEndOfPage)
{
bool flag;
uint lcid;
string text = this._fixedPageContentExtractor.NextGlyphContent(out flag, out lcid);
this._expectingBlockStart = !flag;
return(this.BuildIndexingContentUnit(text, lcid));
}
this._fixedPageContentExtractor = null;
this._topLevelReader = this._xamlReader;
this._xamlReader = new XmlNodeReader(this._fixedPageDomTree.DocumentElement);
this._filterState = XamlFilter.FilterState.FindNextFlowUnit;
}
if (this._xamlReader.EOF)
{
XamlFilter.FilterState filterState = this._filterState;
if (filterState == XamlFilter.FilterState.FindNextUnit)
{
this._filterState = XamlFilter.FilterState.EndOfStream;
return(null);
}
if (filterState == XamlFilter.FilterState.FindNextFlowUnit)
{
this._xamlReader.Close();
this._xamlReader = this._topLevelReader;
this._filterState = XamlFilter.FilterState.FindNextUnit;
}
}
XmlNodeType nodeType = this._xamlReader.NodeType;
if (nodeType <= XmlNodeType.CDATA)
{
if (nodeType == XmlNodeType.Element)
{
indexingContentUnit = this.HandleElementStart();
continue;
}
if (nodeType - XmlNodeType.Text > 1)
{
goto IL_103;
}
}
else if (nodeType != XmlNodeType.SignificantWhitespace)
{
if (nodeType != XmlNodeType.EndElement)
{
goto IL_103;
}
indexingContentUnit = this.HandleElementEnd();
continue;
}
indexingContentUnit = this.HandleTextData();
continue;
IL_103:
this._xamlReader.Read();
}
return(indexingContentUnit);
}
/// <summary>Ancillary function of NextContentUnit(). Create new chunk, taking _contextStack into
/// account, and updating it if needed.</summary>
private IndexingContentUnit BuildIndexingContentUnit(string text, uint lcid)
{
CHUNK_BREAKTYPE breakType = CHUNK_BREAKTYPE.CHUNK_NO_BREAK;
// If a paragraph break is expected, reflect this in the new chunk.
if (_expectingBlockStart)
{
breakType = CHUNK_BREAKTYPE.CHUNK_EOP;
if (_returnCanonicalParagraphBreaks)
text = _paragraphSeparator + text;
}
if (_indexingContentUnit == null)
{
_indexingContentUnit = new IndexingContentUnit(text, AllocateChunkID(), breakType, _propSpec, lcid);
}
else
{
// Optimization: reuse indexing content unit.
_indexingContentUnit.InitIndexingContentUnit(text, AllocateChunkID(), breakType, _propSpec, lcid);
}
// Until proven separated (by the occurrence of a block tag), right neighbors are contiguous.
_expectingBlockStart = false;
return _indexingContentUnit;
}
///<summary>
/// If current token is an element start, then,
/// if appropriate, extract chunk text from an attribute
/// else, record content information and recurse.
///</summary>
///<remarks>
/// Ancillary function of NextContentUnit.
///</remarks>
private IndexingContentUnit HandleElementStart()
{
ElementTableKey elementFullName = new ElementTableKey(_xamlReader.NamespaceURI, _xamlReader.LocalName);
string propertyName;
// Handle the case of a complex property (e.g. Button.Content).
if (IsPrefixedPropertyName(elementFullName.BaseName, out propertyName))
{
ContentDescriptor topOfStack = TopOfStack();
// Handle the semantically incorrect case of a compound property occurring at the root
// by ignoring it totally.
if (topOfStack == null)
{
SkipCurrentElement();
return(null);
}
// Index the text children of property elements only if they are content or title properties.
bool elementIsIndexable =
(elementFullName.XmlNamespace.Equals(ElementTableKey.XamlNamespace, StringComparison.Ordinal) &&
(propertyName == topOfStack.ContentProp ||
propertyName == topOfStack.TitleProp));
if (!elementIsIndexable)
{
// Skip element together with all its descendants.
SkipCurrentElement();
return(null);
}
// Push descriptor, advance reader, and have caller look further.
Push(
new ContentDescriptor(
elementIsIndexable,
TopOfStack().IsInline,
String.Empty, // has potential text content, but no content property
null)); // no title property
_xamlReader.Read();
return(null);
}
// Handle fixed-format markup in a special way (because assumptions for building
// content descriptors don't work for these and they require actions beyond what
// is stated in content descriptors).
// Note: The elementFullyHandled boolean is required as the nextUnit returned can
// be null in both cases - when element is fully handled and when its not.
bool elementFullyHandled;
IndexingContentUnit nextUnit = HandleFixedFormatTag(elementFullName, out elementFullyHandled);
if (elementFullyHandled)
{
return(nextUnit);
}
else
{
// When HandleFixedFormatTag declines to handle a tag because it is not fixed-format, it
// will return null.
Invariant.Assert(nextUnit == null);
}
// Obtain a content descriptor for the current element.
ContentDescriptor elementDescriptor =
(ContentDescriptor)_xamlElementContentDescriptorDictionary[elementFullName];
if (elementDescriptor == null)
{
if (elementFullName.XmlNamespace.Equals(ElementTableKey.XamlNamespace, StringComparison.Ordinal))
{
elementDescriptor = _defaultContentDescriptor;
}
else if (elementFullName.XmlNamespace.Equals(_inDocumentCodeURI, StringComparison.Ordinal))
{
elementDescriptor = _nonIndexableElementDescriptor;
}
else
{
elementDescriptor = GetContentInformationAboutCustomElement(elementFullName);
}
_xamlElementContentDescriptorDictionary.Add(elementFullName, elementDescriptor);
}
// If the element has no indexable content, skip all its descendants.
if (!elementDescriptor.HasIndexableContent)
{
SkipCurrentElement();
return(null);
}
// If appropriate, retrieve title from an attribute.
string title = null;
if (elementDescriptor.TitleProp != null &&
(_attributesToIgnore & AttributesToIgnore.Title) == 0)
{
title = GetPropertyAsAttribute(elementDescriptor.TitleProp);
if (title != null && title.Length > 0)
{
// Leave the reader in its present state, but return the title as a block chunk,
// and mark this attribute as processed.
_attributesToIgnore |= AttributesToIgnore.Title;
_expectingBlockStart = true;
IndexingContentUnit titleContent = BuildIndexingContentUnit(title, GetCurrentLcid());
_expectingBlockStart = true; // Simulate a stack pop for a block element.
return(titleContent);
}
}
// If appropriate, retrieve content from an attribute.
string content = null;
if (elementDescriptor.ContentProp != null &&
(_attributesToIgnore & AttributesToIgnore.Content) == 0)
{
content = GetPropertyAsAttribute(elementDescriptor.ContentProp);
if (content != null && content.Length > 0)
{
// Leave the reader in its present state, but mark the content attribute
// as processed.
_attributesToIgnore |= AttributesToIgnore.Content;
// Create a new chunk with appropriate break data.
if (!elementDescriptor.IsInline)
{
_expectingBlockStart = true;
}
IndexingContentUnit result = BuildIndexingContentUnit(content, GetCurrentLcid());
// Emulate a stack pop for the content attribute (which never gets pushed on the stack).
_expectingBlockStart = !elementDescriptor.IsInline;
return(result);
}
}
// Reset the attribute flag, since we are going to change the reader's state.
_attributesToIgnore = AttributesToIgnore.None;
// Handle the special case of an empty element: no descendants, but a possible paragraph break.
if (_xamlReader.IsEmptyElement)
{
if (!elementDescriptor.IsInline)
{
_expectingBlockStart = true;
}
// Have caller search for content past the tag.
_xamlReader.Read();
return(null);
}
// Have caller look for content in descendants.
Push(elementDescriptor);
_xamlReader.Read(); // skip start-tag
return(null);
}
///<summary>Return the next text chunk, or null at end of stream.</summary>
internal IndexingContentUnit NextContentUnit()
{
// Loop until we are able to return some content or encounter an end of file.
IndexingContentUnit nextContentUnit = null;
while (nextContentUnit == null)
{
// If we have a content extractor delivering content units for us, use it.
if (_filterState == FilterState.UseContentExtractor)
{
Debug.Assert(_fixedPageContentExtractor != null);
// If we've consumed all the glyph run info, switch to a mode in which only the flow content
// of the fixed page just scanned will be returned.
if (_fixedPageContentExtractor.AtEndOfPage)
{
// Discard extractor.
_fixedPageContentExtractor = null;
// Set up reader.
_topLevelReader = _xamlReader;
_xamlReader = new XmlNodeReader(_fixedPageDomTree.DocumentElement);
// Transition to flow-only mode.
_filterState = FilterState.FindNextFlowUnit;
}
else
{
bool chunkIsInline;
uint lcid;
string chunk = _fixedPageContentExtractor.NextGlyphContent(out chunkIsInline, out lcid);
_expectingBlockStart = !chunkIsInline;
return(BuildIndexingContentUnit(chunk, lcid));
}
}
if (_xamlReader.EOF)
{
switch (_filterState)
{
// If in standard mode, return a null chunk to signal the end of all chunks.
case FilterState.FindNextUnit:
// A non-empty stack at this point could only be attributable to an internal error,
// for an early EOF would have been reported as an XML exception by the XML reader.
Debug.Assert(_contextStack.Count == 0);
_filterState = FilterState.EndOfStream;
return(null);
// If processing a fixed page, revert to top-level XML reader.
case FilterState.FindNextFlowUnit:
Debug.Assert(_topLevelReader != null);
_xamlReader.Close();
_xamlReader = _topLevelReader;
_filterState = FilterState.FindNextUnit;
break;
default:
Debug.Assert(false);
break;
}
}
switch (_xamlReader.NodeType)
{
// If current token is a text element,
// if it can be part of its parent's content, return a chunk;
// else, skip.
case XmlNodeType.Text:
case XmlNodeType.SignificantWhitespace:
case XmlNodeType.CDATA:
nextContentUnit = HandleTextData();
continue;
// If current token is an element start, then,
// if appropriate, extract chunk text from an attribute
// else, record content information and recurse.
case XmlNodeType.Element:
nextContentUnit = HandleElementStart();
continue;
// On end of element, restore context data (pop, etc.) and look further.
case XmlNodeType.EndElement:
nextContentUnit = HandleElementEnd();
continue;
// Default action is to ignore current token and look further.
// Note that non-significant whitespace is handled here.
default:
_xamlReader.Read(); // Consume current token.
continue;
}
}
return(nextContentUnit);
}
