C# Class Microsoft.R.Editor.Tree.EditorTree

Document tree for the editor. It does not derive from AST and rather aggregates it. The reason is that editor tree can be read and updated from different threads and hence we need to control access to the tree elements using appropriate locks. Typically there are three threads: main application thread which should be creating editor tree, incremental parse thread and validation (syntx check) thread.

Inheritance: IEditorTree, IDisposable

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Private Properties

Property	Type	Description
ApplyChangesFromQueue	List
Dispose	void
FireOnNodesRemoved	void
FireOnPositionsOnlyChanged	void
FireOnUpdateBegin	void
FireOnUpdateCompleted	void
FireOnUpdatesPending	void
FirePostUpdateEvents	void
GetAstRootUnsafe	Microsoft.R.Core.AST.AstRoot
InvalidateInRange	bool
NotifyTextChange	void
OnTextBufferChanged	void
ProcessChanges	void
TakeThreadOwnerShip	void
ToString	string

Public Methods

Method	Description
AcquireReadLock ( System.Guid treeUserId ) : AstRoot
AcquireWriteLock ( ) : bool
Build ( ) : void	Builds initial AST. Subsequent updates should be coming from a background thread.
Dispose ( ) : void
EditorTree ( ITextBuffer textBuffer, ICoreShell shell, IExpressionTermFilter filter = null ) : System	Creates document tree on a given text buffer.
EnsureTreeReady ( ) : void	Ensures tree is up to date, matches current text buffer snapshot and all changes since the last update were processed. Blocks until all changes have been processed. Does not pump messages.
GetCommentBlockContainingRange ( ITextRange range ) : ITextRange	Determines if a given range is inside a comment and returns range of the comment block.
GetCommentBlockFromPosition ( int position ) : ITextRange	Determines if a given position is inside a comment and returns range of the comment block.
GetPositionElement ( int position, IAstNode &node ) : PositionType	Determines position type and enclosing element node for a given position in the document text.
Invalidate ( ) : void	Removes all elements from the tree
InvokeWhenReady ( Action	Provides a way to automatically invoke particular action once when tree becomes ready again. Typically used in asynchronous completion and signature help scenarios.
IsRangeInComment ( ITextRange range ) : bool	Determines if a given range is inside a comment.
IsRangeInComment ( int position ) : bool	Determines if a given position is inside a comment of any kind. Comment may be plain HTML comment or artifact type comment like <%--...--%> in ASP.NET or @* ... *@ in Razor.
ReleaseReadLock ( System.Guid treeUserId ) : bool
ReleaseWriteLock ( ) : bool

Private Methods

Method	Description
ApplyChangesFromQueue ( Queue queue ) : List
Dispose ( bool disposing ) : void
FireOnNodesRemoved ( IReadOnlyCollection nodes ) : void	Fires 'nodes removed' event on the main thread context
FireOnPositionsOnlyChanged ( ) : void	Fires 'positions changed starting inside this element' event on the main thread context
FireOnUpdateBegin ( ) : void	Fires 'update begin' event on the main thread context
FireOnUpdateCompleted ( TreeUpdateType updateType ) : void	Fires 'update end' event on the main thread context
FireOnUpdatesPending ( IReadOnlyCollection textChanges ) : void	Fires 'tree updates pending' event on the main thread context
FirePostUpdateEvents ( List changes, bool fullParse ) : void
GetAstRootUnsafe ( ) : AstRoot
InvalidateInRange ( ITextRange range ) : bool	Removes nodes from the tree collection if node range is partially or entirely within the deleted region. This is needed since parsing is asynchronous and without node removal intellisense and syntax checker may end up processing nodes that are out of date. Where possible stops at the nearest scope level so scope nodes may still be used in smart indenter.
NotifyTextChange ( int start, int oldLength, int newLength ) : void
OnTextBufferChanged ( object sender, TextContentChangedEventArgs e ) : void
ProcessChanges ( ) : void	Initiates processing of pending changes synchronously.
TakeThreadOwnerShip ( ) : void	Makes current thread owner of the tree. Normally only one thread can access the tree.
ToString ( ) : string

Method Details

AcquireReadLock() public method

public AcquireReadLock ( System.Guid treeUserId ) : AstRoot
treeUserId	System.Guid
return	Microsoft.R.Core.AST.AstRoot

AcquireWriteLock() public method

public AcquireWriteLock ( ) : bool
return	bool

Build() public method

Builds initial AST. Subsequent updates should be coming from a background thread.

public Build ( ) : void
return	void

Dispose() public method

public Dispose ( ) : void
return	void

EditorTree() public method

Creates document tree on a given text buffer.

public EditorTree ( ITextBuffer textBuffer, ICoreShell shell, IExpressionTermFilter filter = null ) : System
textBuffer	ITextBuffer	Text buffer
shell	ICoreShell
filter	IExpressionTermFilter
return	System

EnsureTreeReady() public method

Ensures tree is up to date, matches current text buffer snapshot and all changes since the last update were processed. Blocks until all changes have been processed. Does not pump messages.

public EnsureTreeReady ( ) : void
return	void

GetCommentBlockContainingRange() public method

Determines if a given range is inside a comment and returns range of the comment block.

public GetCommentBlockContainingRange ( ITextRange range ) : ITextRange
range	ITextRange	Text range to check
return	ITextRange

GetCommentBlockFromPosition() public method

Determines if a given position is inside a comment and returns range of the comment block.

public GetCommentBlockFromPosition ( int position ) : ITextRange
position	int	Position to check
return	ITextRange

GetPositionElement() public method

Determines position type and enclosing element node for a given position in the document text.

public GetPositionElement ( int position, IAstNode &node ) : PositionType
position	int	Position in the document text
node	IAstNode	Node that contains position
return	PositionType

Invalidate() public method

Removes all elements from the tree

public Invalidate ( ) : void
return	void

InvokeWhenReady() public method

Provides a way to automatically invoke particular action once when tree becomes ready again. Typically used in asynchronous completion and signature help scenarios.

public InvokeWhenReady ( Action
action	Action	Action to invoke
p	object	Parameter to pass to the action
type	System.Type	Action identifier
processNow	bool	/// If true, change processing begins now. /// If false, next regular parsing pass with process pending changes. ///
return	void

IsRangeInComment() public method

Determines if a given range is inside a comment.

public IsRangeInComment ( ITextRange range ) : bool
range	ITextRange	Text range
return	bool

IsRangeInComment() public method

Determines if a given position is inside a comment of any kind. Comment may be plain HTML comment or artifact type comment like <%--...--%> in ASP.NET or @* ... *@ in Razor.

public IsRangeInComment ( int position ) : bool
position	int	Position in the document
return	bool

ReleaseReadLock() public method

public ReleaseReadLock ( System.Guid treeUserId ) : bool
treeUserId	System.Guid
return	bool

ReleaseWriteLock() public method

public ReleaseWriteLock ( ) : bool
return	bool