Package com.intellij.psi.tree

Interface IReparseableElementTypeBase

All Superinterfaces:

ILazyParseableElementTypeBase

All Known Implementing Classes:

GrBlockElementType, GrBlockLambdaBodyElementType, GrClosureElementType, GrCodeBlockElementType, GrConstructorBlockElementType, IErrorCounterReparseableElementType, IReparseableElementType, JavaElementType.ICodeBlockElementType, ShLazyBlockElementType, ShLazyDoBlockElementType

public interface IReparseableElementTypeBase
extends ILazyParseableElementTypeBase

An additional interface to be implemented by IElementType instances for tokens, which allows for incremental reparse. When the infrastructure detects that all the document's changes are inside an AST node with reparseable type, isParsable(ASTNode, CharSequence, Language, Project) is invoked, and if it's successful, only the contents inside this element are reparsed instead of the whole file. This can speed up reparse dramatically. Implementers of this interface (except IReparseableElementType) must also implement ICustomParsingType.

Method Summary

Modifier and Type	Method and Description
default boolean	isParsable(ASTNode parent, java.lang.CharSequence buffer, Language fileLanguage, Project project) Checks if the specified character sequence can be parsed as a valid content of the chameleon node.
default boolean	isValidReparse(ASTNode oldNode, ASTNode newNode)

Methods inherited from interface com.intellij.psi.tree.ILazyParseableElementTypeBase

parseContents, reuseCollapsedTokens

Method Detail

isParsable

default boolean isParsable(ASTNode parent,
                           java.lang.CharSequence buffer,
                           Language fileLanguage,
                           Project project)

Checks if the specified character sequence can be parsed as a valid content of the chameleon node.

Parameters:

parent - parent node of old (or collapsed) reparseable node. Use this parameter only if you really understand what are doing. Known valid use-case: Indent-based languages. You should know about parent indent in order to decide if block is reparseable with given text. Because if indent of some line became equals to parent indent then the block should have another parent or block is not block anymore. So it cannot be reparsed and whole file or parent block should be reparsed.

buffer - the content to parse.

fileLanguage - language of the file

project - the project containing the content.

Returns:

true if the content is valid, false if not

isValidReparse

default boolean isValidReparse(ASTNode oldNode,
                               ASTNode newNode)