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org.jetbrains.kotlin.psi.psiUtil.psiUtils.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2017 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.psi.psiUtil
import com.intellij.injected.editor.VirtualFileWindow
import com.intellij.openapi.util.TextRange
import com.intellij.psi.*
import com.intellij.psi.search.PsiSearchScopeUtil
import com.intellij.psi.search.SearchScope
import com.intellij.psi.util.PsiTreeUtil
import org.jetbrains.kotlin.diagnostics.DiagnosticUtils
import org.jetbrains.kotlin.psi.KtFile
import org.jetbrains.kotlin.psi.KtFileAnnotationList
import java.util.*
// NOTE: in this file we collect only LANGUAGE INDEPENDENT methods working with PSI and not modifying it
// ----------- Walking children/siblings/parents -------------------------------------------------------------------------------------------
val PsiElement.allChildren: PsiChildRange
get() {
val first = firstChild
return if (first != null) PsiChildRange(first, lastChild) else PsiChildRange.EMPTY
}
fun PsiElement.siblings(forward: Boolean = true, withItself: Boolean = true): Sequence {
return object : Sequence {
override fun iterator(): Iterator {
var next: PsiElement? = this@siblings
return object : Iterator {
init {
if (!withItself) next()
}
override fun hasNext(): Boolean = next != null
override fun next(): PsiElement {
val result = next ?: throw NoSuchElementException()
if (forward)
next = result.nextSibling
else
next = result.prevSibling
return result
}
}
}
}
}
val PsiElement.parentsWithSelf: Sequence
get() = generateSequence(this) { if (it is PsiFile) null else it.parent }
val PsiElement.parents: Sequence
get() = parentsWithSelf.drop(1)
fun PsiElement.prevLeaf(skipEmptyElements: Boolean = false): PsiElement?
= PsiTreeUtil.prevLeaf(this, skipEmptyElements)
fun PsiElement.nextLeaf(skipEmptyElements: Boolean = false): PsiElement?
= PsiTreeUtil.nextLeaf(this, skipEmptyElements)
val PsiElement.prevLeafs: Sequence
get() = generateSequence({ prevLeaf() }, { it.prevLeaf() })
val PsiElement.nextLeafs: Sequence
get() = generateSequence({ nextLeaf() }, { it.nextLeaf() })
fun PsiElement.prevLeaf(filter: (PsiElement) -> Boolean): PsiElement? {
var leaf = prevLeaf()
while (leaf != null && !filter(leaf)) {
leaf = leaf.prevLeaf()
}
return leaf
}
fun PsiElement.nextLeaf(filter: (PsiElement) -> Boolean): PsiElement? {
var leaf = nextLeaf()
while (leaf != null && !filter(leaf)) {
leaf = leaf.nextLeaf()
}
return leaf
}
fun PsiElement.getParentOfTypesAndPredicate(
strict: Boolean = false, vararg parentClasses: Class, predicate: (T) -> Boolean
): T? {
var element = if (strict) parent else this
while (element != null) {
@Suppress("UNCHECKED_CAST")
when {
(parentClasses.isEmpty() || parentClasses.any { parentClass -> parentClass.isInstance(element) }) && predicate(element as T) ->
return element
element is PsiFile ->
return null
else ->
element = element.parent
}
}
return null
}
fun PsiElement.getNonStrictParentOfType(parentClass: Class): T? {
return PsiTreeUtil.getParentOfType(this, parentClass, false)
}
inline fun PsiElement.getParentOfType(strict: Boolean): T? {
return PsiTreeUtil.getParentOfType(this, T::class.java, strict)
}
inline fun PsiElement.getStrictParentOfType(): T? {
return PsiTreeUtil.getParentOfType(this, T::class.java, true)
}
inline fun PsiElement.getNonStrictParentOfType(): T? {
return PsiTreeUtil.getParentOfType(this, T::class.java, false)
}
inline fun PsiElement.getTopmostParentOfType(): T? {
return PsiTreeUtil.getTopmostParentOfType(this, T::class.java)
}
inline fun PsiElement.getChildOfType(): T? {
return PsiTreeUtil.getChildOfType(this, T::class.java)
}
inline fun PsiElement.getChildrenOfType(): Array {
return PsiTreeUtil.getChildrenOfType(this, T::class.java) ?: arrayOf()
}
fun PsiElement.getNextSiblingIgnoringWhitespaceAndComments(withItself: Boolean = false): PsiElement? {
return siblings(withItself = withItself).filter { it !is PsiWhiteSpace && it !is PsiComment }.firstOrNull()
}
fun PsiElement.getNextSiblingIgnoringWhitespace(withItself: Boolean = false): PsiElement? {
return siblings(withItself = withItself).filter { it !is PsiWhiteSpace }.firstOrNull()
}
fun PsiElement.getPrevSiblingIgnoringWhitespaceAndComments(withItself: Boolean = false): PsiElement? {
return siblings(withItself = withItself, forward = false).filter { it !is PsiWhiteSpace && it !is PsiComment }.firstOrNull()
}
inline fun T.nextSiblingOfSameType() = PsiTreeUtil.getNextSiblingOfType(this, T::class.java)
inline fun T.prevSiblingOfSameType() = PsiTreeUtil.getPrevSiblingOfType(this, T::class.java)
fun PsiElement?.isAncestor(element: PsiElement, strict: Boolean = false): Boolean {
return PsiTreeUtil.isAncestor(this, element, strict)
}
fun T.getIfChildIsInBranch(element: PsiElement, branch: T.() -> PsiElement?): T? {
return if (branch().isAncestor(element)) this else null
}
fun T.getIfChildIsInBranches(element: PsiElement, branches: T.() -> Iterable): T? {
return if (branches().any { it.isAncestor(element) }) this else null
}
inline fun PsiElement.getParentOfTypeAndBranch(strict: Boolean = false, noinline branch: T.() -> PsiElement?): T? {
return getParentOfType(strict)?.getIfChildIsInBranch(this, branch)
}
inline fun PsiElement.getParentOfTypeAndBranches(strict: Boolean = false, noinline branches: T.() -> Iterable): T? {
return getParentOfType(strict)?.getIfChildIsInBranches(this, branches)
}
tailrec fun PsiElement.getOutermostParentContainedIn(container: PsiElement): PsiElement? {
val parent = parent
return if (parent == container) this else parent?.getOutermostParentContainedIn(container)
}
fun PsiElement.isInsideOf(elements: Iterable): Boolean = elements.any { it.isAncestor(this) }
fun PsiChildRange.trimWhiteSpaces(): PsiChildRange {
if (first == null) return this
return PsiChildRange(first.siblings().firstOrNull { it !is PsiWhiteSpace }, last!!.siblings(forward = false).firstOrNull { it !is PsiWhiteSpace })
}
// -------------------- Recursive tree visiting --------------------------------------------------------------------------------------------
inline fun PsiElement.forEachDescendantOfType(noinline action: (T) -> Unit) {
forEachDescendantOfType({ true }, action)
}
inline fun PsiElement.forEachDescendantOfType(crossinline canGoInside: (PsiElement) -> Boolean, noinline action: (T) -> Unit) {
this.accept(object : PsiRecursiveElementVisitor() {
override fun visitElement(element: PsiElement) {
if (canGoInside(element)) {
super.visitElement(element)
}
if (element is T) {
action(element)
}
}
})
}
inline fun PsiElement.anyDescendantOfType(noinline predicate: (T) -> Boolean = { true }): Boolean {
return findDescendantOfType(predicate) != null
}
inline fun PsiElement.anyDescendantOfType(crossinline canGoInside: (PsiElement) -> Boolean, noinline predicate: (T) -> Boolean = { true }): Boolean {
return findDescendantOfType(canGoInside, predicate) != null
}
inline fun PsiElement.findDescendantOfType(noinline predicate: (T) -> Boolean = { true }): T? {
return findDescendantOfType({ true }, predicate)
}
inline fun PsiElement.findDescendantOfType(crossinline canGoInside: (PsiElement) -> Boolean, noinline predicate: (T) -> Boolean = { true }): T? {
var result: T? = null
this.accept(object : PsiRecursiveElementWalkingVisitor() {
override fun visitElement(element: PsiElement) {
if (element is T && predicate(element)) {
result = element
stopWalking()
return
}
if (canGoInside(element)) {
super.visitElement(element)
}
}
})
return result
}
inline fun PsiElement.collectDescendantsOfType(noinline predicate: (T) -> Boolean = { true }): List {
return collectDescendantsOfType({ true }, predicate)
}
inline fun PsiElement.collectDescendantsOfType(crossinline canGoInside: (PsiElement) -> Boolean, noinline predicate: (T) -> Boolean = { true }): List {
val result = ArrayList()
forEachDescendantOfType(canGoInside) {
if (predicate(it)) {
result.add(it)
}
}
return result
}
// ----------- Working with offsets, ranges and texts ----------------------------------------------------------------------------------------------
val PsiElement.startOffset: Int
get() = textRange.startOffset
val PsiElement.endOffset: Int
get() = textRange.endOffset
fun PsiElement.getStartOffsetIn(ancestor: PsiElement): Int {
var offset = 0
var parent = this
while (parent != ancestor) {
offset += parent.startOffsetInParent
parent = parent.parent
}
return offset
}
fun TextRange.containsInside(offset: Int): Boolean = startOffset < offset && offset < endOffset
val PsiChildRange.textRange: TextRange?
get() {
if (isEmpty) return null
return TextRange(first!!.startOffset, last!!.endOffset)
}
fun PsiChildRange.getText(): String {
if (isEmpty) return ""
return this.map { it.text }.joinToString("")
}
fun PsiFile.elementsInRange(range: TextRange): List {
var offset = range.startOffset
val result = ArrayList()
while (offset < range.endOffset) {
val currentRange = TextRange(offset, range.endOffset)
val leaf = findFirstLeafWhollyInRange(this, currentRange) ?: break
val element = leaf
.parentsWithSelf
.first {
val parent = it.parent
it is PsiFile || parent.textRange !in currentRange
}
result.add(element)
offset = element.endOffset
}
return result
}
private fun findFirstLeafWhollyInRange(file: PsiFile, range: TextRange): PsiElement? {
var element = file.findElementAt(range.startOffset) ?: return null
var elementRange = element.textRange
if (elementRange.startOffset < range.startOffset) {
element = element.nextLeaf(skipEmptyElements = true) ?: return null
elementRange = element.textRange
}
assert(elementRange.startOffset >= range.startOffset)
return if (elementRange.endOffset <= range.endOffset) element else null
}
val PsiElement.textRangeWithoutComments: TextRange
get() {
val firstNonCommentChild = children.firstOrNull { it !is PsiWhiteSpace && it !is PsiComment } ?: return textRange
return TextRange(firstNonCommentChild.startOffset, endOffset)
}
// ---------------------------------- Debug/logging ----------------------------------------------------------------------------------------
fun PsiElement.getElementTextWithContext(): String {
if (!isValid) return ""
if (this is PsiFile) {
return containingFile.text
}
// Find parent for element among file children
val topLevelElement = PsiTreeUtil.findFirstParent(this, { it.parent is PsiFile }) ?:
throw AssertionError("For non-file element we should always be able to find parent in file children")
val startContextOffset = topLevelElement.startOffset
val elementContextOffset = textRange.startOffset
val inFileParentOffset = elementContextOffset - startContextOffset
val isInjected = containingFile is VirtualFileWindow
return StringBuilder(topLevelElement.text)
.insert(inFileParentOffset, "")
.insert(0, "File name: ${containingFile.name} Physical: ${containingFile.isPhysical} Injected: $isInjected\n")
.toString()
}
fun PsiElement.getTextWithLocation(): String = "'${this.text}' at ${DiagnosticUtils.atLocation(this)}"
fun replaceFileAnnotationList(file: KtFile, annotationList: KtFileAnnotationList): KtFileAnnotationList {
if (file.fileAnnotationList != null) {
return file.fileAnnotationList!!.replace(annotationList) as KtFileAnnotationList
}
val beforeAnchor : PsiElement? = when {
file.packageDirective?.packageKeyword != null -> file.packageDirective!!
file.importList != null -> file.importList!!
file.declarations.firstOrNull() != null -> file.declarations.first()
else -> null
}
if (beforeAnchor != null) {
return file.addBefore(annotationList, beforeAnchor) as KtFileAnnotationList
}
if (file.lastChild == null) {
return file.add(annotationList) as KtFileAnnotationList
}
return file.addAfter(annotationList, file.lastChild) as KtFileAnnotationList
}
// -----------------------------------------------------------------------------------------------------------------------------------------
operator fun SearchScope.contains(element: PsiElement): Boolean = PsiSearchScopeUtil.isInScope(this, element)
fun E.createSmartPointer(): SmartPsiElementPointer =
SmartPointerManager.getInstance(project).createSmartPsiElementPointer(this)
fun PsiElement.before(element: PsiElement) = textRange.endOffset <= element.textRange.startOffset
inline fun PsiElement.getLastParentOfTypeInRow() = parents.takeWhile { it is T }.lastOrNull() as? T
