Phase 4: add structure, folding, and references
This commit is contained in:
99
src/main/kotlin/dev/hgh/jai/editor/JaiFoldingBuilder.kt
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99
src/main/kotlin/dev/hgh/jai/editor/JaiFoldingBuilder.kt
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@@ -0,0 +1,99 @@
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package dev.hgh.jai.editor
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import com.intellij.lang.ASTNode
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import com.intellij.lang.folding.FoldingBuilderEx
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import com.intellij.lang.folding.FoldingDescriptor
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import com.intellij.openapi.editor.Document
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import com.intellij.openapi.project.DumbAware
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import com.intellij.openapi.util.TextRange
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import com.intellij.psi.PsiElement
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import com.intellij.psi.PsiRecursiveElementWalkingVisitor
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import dev.hgh.jai.lexer.JaiTokenTypes
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import dev.hgh.jai.psi.JaiBlock
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/**
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* Folding for Jai blocks, comments, and multi-line here-strings.
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*
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* Jai's block delimiters are ordinary PSI leaves even when the block belongs to a
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* procedure, struct, enum, or control-flow statement, so one visitor covers all of
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* those constructs. The interior of a block is folded rather than the delimiters;
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* this keeps the opening and closing braces visible in the editor.
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*/
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class JaiFoldingBuilder :
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FoldingBuilderEx(),
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DumbAware {
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override fun buildFoldRegions(
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root: PsiElement,
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document: Document,
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quick: Boolean,
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): Array<FoldingDescriptor> {
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val descriptors = mutableListOf<FoldingDescriptor>()
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root.accept(
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object : PsiRecursiveElementWalkingVisitor() {
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override fun visitElement(element: PsiElement) {
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when {
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element is JaiBlock -> {
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addInteriorFold(element, document, 1, 1, descriptors)
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}
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element.node.elementType == JaiTokenTypes.BLOCK_COMMENT -> {
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addInteriorFold(element, document, 2, 2, descriptors)
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}
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element.node.elementType == JaiTokenTypes.HERE_STRING -> {
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addHereStringFold(element, document, descriptors)
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}
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}
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super.visitElement(element)
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}
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},
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)
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return descriptors.toTypedArray()
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}
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override fun getPlaceholderText(node: ASTNode): String =
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when (node.elementType) {
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JaiTokenTypes.BLOCK_COMMENT -> "..."
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JaiTokenTypes.HERE_STRING -> "#string …"
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else -> "..."
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}
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override fun isCollapsedByDefault(node: ASTNode): Boolean = false
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private fun addInteriorFold(
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element: PsiElement,
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document: Document,
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openingLength: Int,
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closingLength: Int,
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descriptors: MutableList<FoldingDescriptor>,
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) {
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val range = element.textRange
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val start = range.startOffset + openingLength
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val end = range.endOffset - closingLength
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if (start >= end || !isMultiLine(document, start, end)) return
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descriptors += FoldingDescriptor(element.node, TextRange(start, end))
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}
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private fun addHereStringFold(
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element: PsiElement,
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document: Document,
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descriptors: MutableList<FoldingDescriptor>,
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) {
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val range = element.textRange
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if (range.length == 0 || !isMultiLine(document, range.startOffset, range.endOffset)) return
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// The token contains both the header and its captured terminator. Folding the
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// whole token is intentional: unlike a block comment, there is no fixed pair
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// of delimiters whose visibility would help the reader.
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descriptors += FoldingDescriptor(element.node, range)
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}
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private fun isMultiLine(
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document: Document,
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start: Int,
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end: Int,
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): Boolean = start < end && document.getLineNumber(start) < document.getLineNumber(end - 1)
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}
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@@ -0,0 +1,22 @@
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package dev.hgh.jai.psi.mixin
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import com.intellij.lang.ASTNode
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import com.intellij.psi.ContributedReferenceHost
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import com.intellij.psi.PsiReference
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import com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry
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import dev.hgh.jai.psi.impl.JaiExprImpl
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/**
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* Gives generated literal PSI access to reference-contributor providers.
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*
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* Grammar-Kit's normal AST wrapper does not implement [ContributedReferenceHost],
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* so IntelliJ's reference service otherwise only sees references returned directly
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* by `getReference()`. Import/load paths are supplied by a contributor and therefore
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* need this small generated-PSI mixin.
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*/
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abstract class JaiReferenceHostMixin(
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node: ASTNode,
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) : JaiExprImpl(node),
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ContributedReferenceHost {
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override fun getReferences(): Array<PsiReference> = ReferenceProvidersRegistry.getReferencesFromProviders(this)
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}
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250
src/main/kotlin/dev/hgh/jai/reference/JaiReferenceContributor.kt
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250
src/main/kotlin/dev/hgh/jai/reference/JaiReferenceContributor.kt
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@@ -0,0 +1,250 @@
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package dev.hgh.jai.reference
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import com.intellij.openapi.project.Project
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import com.intellij.openapi.util.TextRange
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import com.intellij.openapi.vfs.LocalFileSystem
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import com.intellij.openapi.vfs.VirtualFile
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import com.intellij.patterns.PlatformPatterns
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import com.intellij.psi.PsiElement
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import com.intellij.psi.PsiManager
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import com.intellij.psi.PsiReference
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import com.intellij.psi.PsiReferenceBase
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import com.intellij.psi.PsiReferenceContributor
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import com.intellij.psi.PsiReferenceProvider
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import com.intellij.psi.PsiReferenceRegistrar
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import com.intellij.util.ProcessingContext
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import dev.hgh.jai.lexer.JaiTokenTypes
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import dev.hgh.jai.psi.JaiDirectiveExpr
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import dev.hgh.jai.psi.JaiLiteralExpr
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/** Adds file references to string operands of Jai's import and load directives. */
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class JaiReferenceContributor : PsiReferenceContributor() {
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override fun registerReferenceProviders(registrar: PsiReferenceRegistrar) {
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registrar.registerReferenceProvider(
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PlatformPatterns.psiElement(JaiLiteralExpr::class.java),
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JaiModuleReferenceProvider(),
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)
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}
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}
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private class JaiModuleReferenceProvider : PsiReferenceProvider() {
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override fun getReferencesByElement(
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element: PsiElement,
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context: ProcessingContext,
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): Array<PsiReference> {
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val literal = element as? JaiLiteralExpr ?: return PsiReference.EMPTY_ARRAY
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val directive = literal.parent as? JaiDirectiveExpr ?: return PsiReference.EMPTY_ARRAY
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val directiveName = directive.directiveName() ?: return PsiReference.EMPTY_ARRAY
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if (directiveName != "#import" && directiveName != "#load") return PsiReference.EMPTY_ARRAY
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val path = parseStringLiteral(literal.text) ?: return PsiReference.EMPTY_ARRAY
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val flags = directive.flagsBefore(literal)
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if ("string" in flags) return PsiReference.EMPTY_ARRAY
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// Keep the quotes outside the reference range. This makes Ctrl/Cmd-click and
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// rename-like editor actions operate on the path rather than on its delimiters.
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if (literal.textLength < 2) return PsiReference.EMPTY_ARRAY
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val range = TextRange(1, literal.textLength - 1)
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val target = JaiModuleTarget(directiveName, path, flags)
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return arrayOf(JaiModuleReference(literal, range, target))
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}
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private fun parseStringLiteral(text: String): String? {
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if (text.length < 2 || text.first() != '"' || text.last() != '"') return null
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return unescape(text.substring(1, text.length - 1))
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}
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private fun unescape(text: String): String =
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buildString(text.length) {
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var index = 0
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while (index < text.length) {
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val character = text[index]
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if (character == '\\' && index + 1 < text.length) {
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val escaped = text[index + 1]
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append(
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when (escaped) {
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'\\' -> '\\'
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'"' -> '"'
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'/' -> '/'
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else -> escaped
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},
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)
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index += 2
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} else {
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append(character)
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index++
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}
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}
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}
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}
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private data class JaiModuleTarget(
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val directive: String,
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val path: String,
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val flags: Set<String>,
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)
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private enum class JaiPathMode {
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MODULE,
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FILE,
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DIRECTORY,
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RELATIVE,
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}
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private class JaiModuleReference(
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private val sourceElement: PsiElement,
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rangeInElement: TextRange,
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private val target: JaiModuleTarget,
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) : PsiReferenceBase<PsiElement>(sourceElement, rangeInElement, false) {
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override fun resolve(): PsiElement? {
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val containingFile = sourceElement.containingFile ?: return null
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val virtualFile = containingFile.virtualFile ?: return null
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val targetFile = JaiModuleResolver.resolve(sourceElement.project, virtualFile, target) ?: return null
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return PsiManager.getInstance(sourceElement.project).findFile(targetFile)
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}
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override fun getVariants(): Array<Any> = emptyArray()
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}
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/** Resolves paths without requiring an external compiler or an IDE index. */
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private object JaiModuleResolver {
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private val fileSystem: LocalFileSystem
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get() = LocalFileSystem.getInstance()
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fun resolve(
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project: Project,
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sourceFile: VirtualFile,
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target: JaiModuleTarget,
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): VirtualFile? {
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val rawPath = target.path.replace('\\', '/')
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val path = normalize(rawPath)
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if (path.isEmpty()) return null
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val mode =
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when {
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target.directive == "#load" || "file" in target.flags -> JaiPathMode.FILE
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"dir" in target.flags -> JaiPathMode.DIRECTORY
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rawPath.startsWith("./") || rawPath.startsWith("../") -> JaiPathMode.RELATIVE
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else -> JaiPathMode.MODULE
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}
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if (path.startsWith('/')) {
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return findAbsolute(path, mode)
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}
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val roots = candidateRoots(project, sourceFile, mode)
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for (root in roots) {
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findInRoot(root, path, mode)?.let { return it }
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}
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return null
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}
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private fun candidateRoots(
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project: Project,
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sourceFile: VirtualFile,
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mode: JaiPathMode,
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): List<VirtualFile> {
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val roots = linkedMapOf<String, VirtualFile>()
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fun add(root: VirtualFile?) {
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if (root != null && root.isValid && root.isDirectory) roots.putIfAbsent(root.path, root)
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}
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val sourceRoot = sourceFile.parent
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if (mode == JaiPathMode.MODULE) {
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add(sourceRoot?.findChild("modules"))
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val projectRoot = project.basePath?.let(fileSystem::findFileByPath)
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add(projectRoot?.findChild("modules"))
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add(projectRoot)
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add(
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fileSystem.findFileByPath(
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"${System.getProperty("user.home")}/.local/jai/modules",
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),
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)
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} else {
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// #load, #import,file, #import,dir, and explicit ./ or ../ paths are
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// direct paths. Do not silently find a same-named file in another root.
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add(sourceRoot)
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}
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return roots.values.toList()
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}
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private fun findAbsolute(
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path: String,
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mode: JaiPathMode,
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): VirtualFile? {
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val direct = fileSystem.findFileByPath(path)
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if (direct != null) {
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when (mode) {
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JaiPathMode.FILE -> {
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if (!direct.isDirectory) return direct
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}
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JaiPathMode.DIRECTORY -> {
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if (direct.isDirectory) return direct.findChild("module.jai")
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}
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JaiPathMode.RELATIVE -> {
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return if (direct.isDirectory) direct.findChild("module.jai") else direct
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}
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JaiPathMode.MODULE -> {
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if (!direct.isDirectory) return direct
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direct.findChild("module.jai")?.let { return it }
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}
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}
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}
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if (mode == JaiPathMode.MODULE && !path.endsWith(".jai")) {
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return fileSystem.findFileByPath("$path.jai")
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?: fileSystem.findFileByPath("$path/module.jai")
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}
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return null
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}
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private fun findInRoot(
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root: VirtualFile,
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path: String,
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mode: JaiPathMode,
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): VirtualFile? {
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val direct = root.findFileByRelativePath(path)
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if (direct != null) {
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when (mode) {
|
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JaiPathMode.FILE -> {
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if (!direct.isDirectory) return direct
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||||
}
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JaiPathMode.DIRECTORY -> {
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if (direct.isDirectory) return direct.findChild("module.jai")
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}
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JaiPathMode.RELATIVE -> {
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return if (direct.isDirectory) direct.findChild("module.jai") else direct
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}
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JaiPathMode.MODULE -> {
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if (!direct.isDirectory) return direct
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direct.findChild("module.jai")?.let { return it }
|
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}
|
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}
|
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}
|
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if (mode == JaiPathMode.MODULE && !path.endsWith(".jai")) {
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return root.findFileByRelativePath("$path.jai")
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?: root.findFileByRelativePath("$path/module.jai")
|
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}
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return null
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}
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private fun normalize(path: String): String = path.replace('\\', '/').removePrefix("./")
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||||
}
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||||
private fun JaiDirectiveExpr.directiveName(): String? = node.findChildByType(JaiTokenTypes.DIRECTIVE)?.text
|
||||
|
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private fun JaiDirectiveExpr.flagsBefore(literal: PsiElement): Set<String> {
|
||||
val prefixEnd = literal.textRange.startOffset - textRange.startOffset
|
||||
if (prefixEnd <= 0 || prefixEnd > text.length) return emptySet()
|
||||
val prefix = text.substring(0, prefixEnd)
|
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return Regex(",\\s*([A-Za-z_][A-Za-z0-9_]*)")
|
||||
.findAll(prefix)
|
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.map { it.groupValues[1] }
|
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.toSet()
|
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}
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114
src/main/kotlin/dev/hgh/jai/structure/JaiStructureViewElement.kt
Normal file
114
src/main/kotlin/dev/hgh/jai/structure/JaiStructureViewElement.kt
Normal file
@@ -0,0 +1,114 @@
|
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package dev.hgh.jai.structure
|
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|
||||
import com.intellij.ide.projectView.PresentationData
|
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import com.intellij.ide.structureView.StructureViewTreeElement
|
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import com.intellij.ide.util.treeView.smartTree.SortableTreeElement
|
||||
import com.intellij.ide.util.treeView.smartTree.TreeElement
|
||||
import com.intellij.navigation.ItemPresentation
|
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import com.intellij.psi.NavigatablePsiElement
|
||||
import com.intellij.psi.PsiElement
|
||||
import dev.hgh.jai.psi.JaiBlock
|
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import dev.hgh.jai.psi.JaiDeclaration
|
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import dev.hgh.jai.psi.JaiEnumExpr
|
||||
import dev.hgh.jai.psi.JaiFile
|
||||
import dev.hgh.jai.psi.JaiOperatorDeclaration
|
||||
import dev.hgh.jai.psi.JaiProcLiteralExpr
|
||||
import dev.hgh.jai.psi.JaiStatement
|
||||
import dev.hgh.jai.psi.JaiStructExpr
|
||||
import dev.hgh.jai.psi.JaiUnionExpr
|
||||
|
||||
/** A navigable node in the Jai Structure tool window. */
|
||||
class JaiStructureViewElement(
|
||||
private val element: PsiElement,
|
||||
) : StructureViewTreeElement,
|
||||
SortableTreeElement {
|
||||
override fun getValue(): Any = element
|
||||
|
||||
override fun navigate(requestFocus: Boolean) {
|
||||
(element as? NavigatablePsiElement)?.navigate(requestFocus)
|
||||
}
|
||||
|
||||
override fun canNavigate(): Boolean = (element as? NavigatablePsiElement)?.canNavigate() == true
|
||||
|
||||
override fun canNavigateToSource(): Boolean = (element as? NavigatablePsiElement)?.canNavigateToSource() == true
|
||||
|
||||
override fun getAlphaSortKey(): String = label(element)
|
||||
|
||||
override fun getPresentation(): ItemPresentation = PresentationData().also { it.presentableText = label(element) }
|
||||
|
||||
override fun getChildren(): Array<TreeElement> =
|
||||
structureChildren(element)
|
||||
.map(::JaiStructureViewElement)
|
||||
.toTypedArray()
|
||||
|
||||
private fun structureChildren(parent: PsiElement): List<PsiElement> =
|
||||
when (parent) {
|
||||
is JaiFile -> {
|
||||
directMembers(parent)
|
||||
}
|
||||
|
||||
is JaiDeclaration -> {
|
||||
parent.initializerList.flatMap { initializer ->
|
||||
directMembers(structuralBlock(initializer.expr))
|
||||
}
|
||||
}
|
||||
|
||||
is JaiOperatorDeclaration -> {
|
||||
directMembers(structuralBlock(parent.expr))
|
||||
}
|
||||
|
||||
else -> {
|
||||
emptyList()
|
||||
}
|
||||
}
|
||||
|
||||
private fun directMembers(parent: PsiElement?): List<PsiElement> =
|
||||
when (parent) {
|
||||
is JaiFile -> parent.children.filterIsInstance<JaiStatement>()
|
||||
is JaiBlock -> parent.statementList
|
||||
else -> emptyList()
|
||||
}.mapNotNull { statement ->
|
||||
statement.declaration ?: statement.operatorDeclaration
|
||||
}
|
||||
|
||||
private fun structuralBlock(expression: PsiElement?): JaiBlock? =
|
||||
when (expression) {
|
||||
is JaiProcLiteralExpr -> expression.block
|
||||
is JaiStructExpr -> expression.block
|
||||
is JaiEnumExpr -> expression.block
|
||||
is JaiUnionExpr -> expression.block
|
||||
else -> null
|
||||
}
|
||||
|
||||
private fun label(element: PsiElement): String =
|
||||
when (element) {
|
||||
is JaiFile -> {
|
||||
element.name
|
||||
}
|
||||
|
||||
is JaiDeclaration -> {
|
||||
element.declNames.declNameList
|
||||
.joinToString(", ") { it.text.trim('`') }
|
||||
.ifEmpty { "declaration" }
|
||||
}
|
||||
|
||||
is JaiOperatorDeclaration -> {
|
||||
"operator ${operatorName(element)}"
|
||||
}
|
||||
|
||||
else -> {
|
||||
element.text
|
||||
.lineSequence()
|
||||
.firstOrNull()
|
||||
?.trim()
|
||||
.orEmpty()
|
||||
}
|
||||
}
|
||||
|
||||
private fun operatorName(declaration: JaiOperatorDeclaration): String =
|
||||
declaration.text
|
||||
.substringBefore("::")
|
||||
.removePrefix("operator")
|
||||
.trim()
|
||||
.ifEmpty { "operator" }
|
||||
}
|
||||
@@ -0,0 +1,16 @@
|
||||
package dev.hgh.jai.structure
|
||||
|
||||
import com.intellij.ide.structureView.StructureViewBuilder
|
||||
import com.intellij.ide.structureView.StructureViewModel
|
||||
import com.intellij.ide.structureView.TreeBasedStructureViewBuilder
|
||||
import com.intellij.lang.PsiStructureViewFactory
|
||||
import com.intellij.openapi.editor.Editor
|
||||
import com.intellij.psi.PsiFile
|
||||
|
||||
/** Creates the standard IntelliJ Structure tool window for Jai files. */
|
||||
class JaiStructureViewFactory : PsiStructureViewFactory {
|
||||
override fun getStructureViewBuilder(psiFile: PsiFile): StructureViewBuilder =
|
||||
object : TreeBasedStructureViewBuilder() {
|
||||
override fun createStructureViewModel(editor: Editor?): StructureViewModel = JaiStructureViewModel(editor, psiFile)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,36 @@
|
||||
package dev.hgh.jai.structure
|
||||
|
||||
import com.intellij.ide.structureView.StructureViewModel
|
||||
import com.intellij.ide.structureView.StructureViewModelBase
|
||||
import com.intellij.ide.structureView.StructureViewTreeElement
|
||||
import com.intellij.openapi.editor.Editor
|
||||
import com.intellij.psi.PsiFile
|
||||
import dev.hgh.jai.psi.JaiDeclaration
|
||||
import dev.hgh.jai.psi.JaiFile
|
||||
import dev.hgh.jai.psi.JaiOperatorDeclaration
|
||||
|
||||
/**
|
||||
* Structure-view model for Jai declarations.
|
||||
*
|
||||
* Declarations are source ordered. Jai has no declaration keyword (a procedure,
|
||||
* struct, and variable are all `name :: value`), so the tree element derives its
|
||||
* label from the declaration's name and leaves the complete type/value text in PSI.
|
||||
*/
|
||||
class JaiStructureViewModel(
|
||||
editor: Editor?,
|
||||
file: PsiFile,
|
||||
) : StructureViewModelBase(file, editor, JaiStructureViewElement(file)),
|
||||
StructureViewModel.ElementInfoProvider {
|
||||
override fun isAlwaysShowsPlus(element: StructureViewTreeElement): Boolean = false
|
||||
|
||||
override fun isAlwaysLeaf(element: StructureViewTreeElement): Boolean =
|
||||
element !is JaiStructureViewElement ||
|
||||
(
|
||||
element.value !is JaiFile &&
|
||||
element.value !is JaiDeclaration &&
|
||||
element.value !is JaiOperatorDeclaration
|
||||
)
|
||||
|
||||
override fun getSuitableClasses(): Array<Class<*>> =
|
||||
arrayOf(JaiFile::class.java, JaiDeclaration::class.java, JaiOperatorDeclaration::class.java)
|
||||
}
|
||||
Reference in New Issue
Block a user