override fun getSuggestion()

in src/main/kotlin/org/jetbrains/plugins/feature/suggester/suggesters/RenamingSuggester.kt [49:87]
34 lines of code
8 McCabe index (conditional complexity)

    override fun getSuggestion(action: Action): Suggestion {
        val language = action.language ?: return NoSuggestion
        val langSupport = LanguageSupport.getForLanguage(language) ?: return NoSuggestion
        val name = CommandProcessor.getInstance().currentCommandName
        if (name != null && name != "Paste") {
            return NoSuggestion
        }
        when (action) {
            is BeforeChildReplacedAction -> {
                val parent = action.parent
                val oldChild = action.oldChild
                if (langSupport.isIdentifier(oldChild)) {
                    if (!renamedIdentifiersData.references.contains(parent)) {
                        // TODO Find out why resolve reference causes:
                        //  "java.lang.Throwable: Somebody has requested stubbed spine during PSI operations;
                        //  not only is this expensive, but will also cause stub PSI invalidation"
                        //  Can be reproduced placing '{' before another code block "{ ... }"
                        val declaration = parent.reference?.resolve() ?: parent

                        @Suppress("SpreadOperator")
                        val references = arrayListOf(declaration, *declaration.getAllReferences().toTypedArray())
                        renamedIdentifiersData = RenamedIdentifiersData(oldChild.text, references)
                    }
                }
            }
            is ChildReplacedAction -> {
                val parent = action.parent
                val newChild = action.newChild
                if (langSupport.isIdentifier(newChild)) {
                    if (renamedIdentifiersData.references.contains(parent) &&
                        renamedIdentifiersData.isAllRenamed()
                    ) {
                        return createSuggestion()
                    }
                }
            }
        }
        return NoSuggestion
    }