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Scala plugin for IntelliJ IDEA
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Pavel Fatin
July 16, 2011
Programming
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150
Scala plugin for IntelliJ IDEA
Scalathon 2011,
http://scalathon.org/2011/
http://vimeo.com/28692913
Pavel Fatin
July 16, 2011
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Transcript
Pavel Fatin Alexander Podkhalyuzin Scalathon, 2011 Scala plugin for IntelliJ
IDEA
Thank you!
IntelliJ Scala Plugin Agenda Why do we need it
What's inside How it's made How to contribute
Do we need an IDE for Scala?
Can't we just use Notepad? Rationale
Is it always the right tool? Rationale ?
What makes us more productive? Highlighting Inspections
Code formatting Auto-completion Information look-up Refactoring Integration Rationale
What's already available?
Syntax highlighting Injected language By-name argument Implicit conversion Deprecated method
Features
Error highlighting Ordinary: Type-aware: Quick-fixes: Features
Inspections Unused symbol Variable could be value
Redundant return Syntactic sugar Method signature inspections Features
Language injection Pattern-based: Via parameter annotation: Via
value annotation: Features
Dark color schemes Features
Language-aware editor Brace balancing: Entities selection: Code
folding: Features
Formatting Features
Code completion Features
Information look-up Type info Parameter info Documentation
look-up Definition look-up Features
Type Info Features
Parameter info Features
Documentation look-up Features
Definition look-up Features
Imports management Import entity on completion Auto-import unresolved
symbol Highlight unused imports Optimize imports Paste imports Features
Refactoring Rename Introduce variable Inline variable
Extract method Introduce parameter Features
Rename Features
Introduce variable Features
Inline variable Features
Extract method Features
Introduce parameter Features
Integrations Java JUnit / Specs / ScalaTest
Maven Spring Lift SBT Features
How it's made (It's not rocket science theoretical physics)
Building the project Get the latest IDEA EAP build
Download IDEA sources Enable DevKit plugin Configure a Plugin SDK Clone Scala plugin repository Open the project in IDEA Architecture
Plugging the plugin Plugin.xml OpenAPI Architecture
Code processing Document Lexer Parser Wrapper PSI Architecture Text Tokens
AST
Processing example Literal Literal ReferenceExpression ReferenceExpression WhiteSpace WhiteSpace Architecture STRING
WS IDENTIFIER TRUE "that's" + WhiteSpace WhiteSpace Literal Literal true WS InfixExpression InfixExpression
PSI viewer Architecture
PSI foundation Architecture PsiElement textRange parent children prevSibling nextSibling add(element)
addBefore(element, anchor) addAfter(element, anchor) delete() replace(newElement)
PSI elements hierarchy Scala Architecture PsiFile ScTypeDefinition ScalaFile PsiComment ScGenerator
PsiClass PsiElement
Scala Language Specification Architecture
Scala domain elements Architecture ScClass name constructor superTypes members extendsblock
add(member, anchor) remove(member) isInheritor(psiClass)
TODO
Tasks Bug fixes Inspections Refactorings Intentions
Frameworks support Type system improvement [Your most wanted feature here] TODO
Everyone is Welcome!