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RsImportCopyPasteProcessor.kt
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RsImportCopyPasteProcessor.kt
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/*
* Use of this source code is governed by the MIT license that can be
* found in the LICENSE file.
*/
package org.rust.ide.typing.paste
import com.intellij.codeInsight.editorActions.CopyPastePostProcessor
import com.intellij.codeInsight.editorActions.TextBlockTransferableData
import com.intellij.openapi.application.runWriteAction
import com.intellij.openapi.editor.Editor
import com.intellij.openapi.editor.RangeMarker
import com.intellij.openapi.project.DumbService
import com.intellij.openapi.project.Project
import com.intellij.openapi.util.Ref
import com.intellij.openapi.util.TextRange
import com.intellij.psi.PsiDocumentManager
import com.intellij.psi.PsiElement
import com.intellij.psi.PsiFile
import com.intellij.psi.impl.source.tree.injected.changesHandler.range
import com.intellij.psi.util.parents
import org.rust.ide.inspections.import.AutoImportFix
import org.rust.ide.utils.import.import
import org.rust.lang.core.psi.*
import org.rust.lang.core.psi.ext.*
import org.rust.lang.core.types.inference
import org.rust.openapiext.toPsiFile
import java.awt.datatransfer.DataFlavor
import java.awt.datatransfer.Transferable
import java.awt.datatransfer.UnsupportedFlavorException
import java.io.IOException
class RsTextBlockTransferableData(val offsetToFqnMap: Map<Int, String>) : TextBlockTransferableData, Cloneable {
override fun getFlavor(): DataFlavor? = RsImportCopyPasteProcessor.dataFlavor
override fun getOffsetCount(): Int = 0
override fun getOffsets(offsets: IntArray?, index: Int): Int = index
override fun setOffsets(offsets: IntArray?, index: Int): Int = index
public override fun clone(): RsTextBlockTransferableData {
try {
return super.clone() as RsTextBlockTransferableData
} catch (e: CloneNotSupportedException) {
throw RuntimeException()
}
}
}
class RsImportCopyPasteProcessor : CopyPastePostProcessor<RsTextBlockTransferableData>() {
override fun collectTransferableData(
file: PsiFile,
editor: Editor,
startOffsets: IntArray,
endOffsets: IntArray
): List<RsTextBlockTransferableData> {
if (file !is RsFile || DumbService.getInstance(file.getProject()).isDumb) return emptyList()
val ranges = startOffsets.indices.map { TextRange(startOffsets[it], endOffsets[it]) }
val map = if (ranges.size == 1) {
createFqnMap(file, ranges[0])
} else {
emptyMap()
}
return listOf(
RsTextBlockTransferableData(map)
)
}
override fun extractTransferableData(content: Transferable): List<RsTextBlockTransferableData> {
try {
val data = content.getTransferData(dataFlavor) as? RsTextBlockTransferableData ?: return emptyList()
// copy to prevent changing of original by convertLineSeparators
return listOf(data.clone())
} catch (ignored: UnsupportedFlavorException) {
} catch (ignored: IOException) {
}
return emptyList()
}
override fun processTransferableData(
project: Project,
editor: Editor,
bounds: RangeMarker,
caretOffset: Int,
indented: Ref<in Boolean>,
values: List<RsTextBlockTransferableData>
) {
PsiDocumentManager.getInstance(project).commitAllDocuments()
val data = values.getOrNull(0) ?: return
val rsFile = editor.document.toPsiFile(project) as? RsFile ?: return
val range = bounds.range
val elements = gatherElements(rsFile, range)
val importCtx = elements.firstOrNull { it is RsElement } as? RsElement ?: return
val visitor = ImportingVisitor(project, importCtx, range, data)
runWriteAction {
for (element in elements) {
element.accept(visitor)
}
}
}
companion object {
val dataFlavor: DataFlavor? by lazy {
try {
val dataClass = RsReferenceData::class.java
DataFlavor(
DataFlavor.javaJVMLocalObjectMimeType + ";class=" + dataClass.name,
"RsReferenceData",
dataClass.classLoader
)
} catch (e: NoClassDefFoundError) {
null
} catch (e: IllegalArgumentException) {
null
}
}
}
}
private class RsReferenceData
private class ImportingVisitor(
private val project: Project,
private val importCtx: RsElement,
private val range: TextRange,
private val data: RsTextBlockTransferableData
) : RsRecursiveVisitor() {
override fun visitPath(path: RsPath) {
val ctx = AutoImportFix.findApplicableContext(project, path)
handleContext(path, ctx)
super.visitPath(path)
}
override fun visitMethodCall(methodCall: RsMethodCall) {
val ctx = AutoImportFix.findApplicableContext(project, methodCall)
handleContext(methodCall, ctx)
super.visitMethodCall(methodCall)
}
private fun handleContext(element: PsiElement, ctx: AutoImportFix.Context?) {
if (ctx != null) {
if (ctx.candidates.size == 1) {
ctx.candidates[0].import(importCtx)
} else {
val candidate = ctx.candidates.find {
val offset = toRelativeOffset(element, range)
val fqn = data.offsetToFqnMap[offset]
fqn == it.qualifiedNamedItem.item.qualifiedName
}
candidate?.import(importCtx)
}
}
}
}
/**
* Records mapping between offsets (relative to copy/paste content range) and fully qualified names of resolved items
* from paths and method calls.
*/
private fun createFqnMap(file: RsFile, range: TextRange): Map<Int, String> {
val elements = gatherElements(file, range)
val map = mutableMapOf<Int, String>()
val visitor = object : RsRecursiveVisitor() {
override fun visitPath(path: RsPath) {
val target = (path.reference?.resolve() as? RsQualifiedNamedElement)?.qualifiedName
if (target != null) {
map[toRelativeOffset(path, range)] = target
}
super.visitPath(path)
}
override fun visitMethodCall(methodCall: RsMethodCall) {
val methods = methodCall.inference?.getResolvedMethod(methodCall)
val target = methods?.mapNotNull {
it.source.implementedTrait?.element?.qualifiedName
}?.firstOrNull()
if (target != null) {
map[toRelativeOffset(methodCall, range)] = target
}
super.visitMethodCall(methodCall)
}
}
for (element in elements) {
element.accept(visitor)
}
return map
}
private fun gatherElements(file: RsFile, range: TextRange): List<PsiElement> {
val leafElement = file.findElementAt(range.startOffset) ?: return emptyList()
val firstElement = leafElement
.parents(true)
.takeWhile { it.startOffset >= range.startOffset }
.lastOrNull() as? RsElement ?: return emptyList()
val siblings = firstElement
.rightSiblings
.takeWhile { it.endOffset <= range.endOffset }
return listOf(firstElement) + siblings
}
private fun toRelativeOffset(element: PsiElement, range: TextRange): Int = element.startOffset - range.startOffset