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December 19, 2015 17:38
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Draft of PSI matching utils (intended to be used with https://github.com/dkandalov/live-plugin)
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import com.intellij.codeInsight.highlighting.HighlightUsagesHandler | |
import com.intellij.openapi.editor.Document | |
import com.intellij.openapi.editor.Editor | |
import com.intellij.openapi.editor.markup.EffectType | |
import com.intellij.openapi.editor.markup.HighlighterTargetArea | |
import com.intellij.openapi.editor.markup.TextAttributes | |
import com.intellij.openapi.fileEditor.FileDocumentManager | |
import com.intellij.openapi.project.Project | |
import com.intellij.openapi.vfs.VirtualFile | |
import com.intellij.psi.JavaPsiFacade | |
import com.intellij.psi.PsiClassType | |
import com.intellij.psi.PsiDocumentManager | |
import com.intellij.psi.PsiElement | |
import com.intellij.psi.PsiElementFactory | |
import com.intellij.psi.PsiExpression | |
import com.intellij.psi.PsiFile | |
import com.intellij.psi.PsiFileFactory | |
import com.intellij.psi.PsiJavaFile | |
import com.intellij.psi.PsiKeyword | |
import com.intellij.psi.PsiMethodCallExpression | |
import com.intellij.psi.PsiReferenceExpression | |
import com.intellij.psi.PsiReferenceParameterList | |
import com.intellij.psi.PsiReturnStatement | |
import com.intellij.psi.PsiStatement | |
import com.intellij.psi.PsiTypeElement | |
import com.intellij.psi.PsiVariable | |
import com.intellij.psi.PsiMethod | |
import groovy.transform.Field | |
import groovy.transform.Immutable | |
import java.awt.Color | |
import java.awt.Font | |
import static PsiMatchUtil.* | |
import static Result.failure | |
import static Result.psiElementsIn | |
import static Result.success | |
import static com.intellij.openapi.fileTypes.StdFileTypes.* | |
import static liveplugin.PluginUtil.* | |
if (isIdeStartup) return | |
//try { | |
// testAddingReturnTypeParameter(project) | |
// show("testAddingReturnTypeParameter... ok") | |
//} catch (AssertionError assertionError) { | |
// showInConsole(assertionError, project) | |
//} | |
//return | |
registerAction("InferReturnTypeParameter", "ctrl shift T") { | |
def editor = currentEditorIn(project) | |
def psiFile = currentPsiFileIn(project) | |
def element = psiFile.findElementAt(editor.caretModel.offset) | |
def psiMethod = findParent(element){ it instanceof PsiMethod } | |
if (psiMethod == null) return | |
def result = addInferredReturnTypeParameter(psiMethod, project) | |
highlightIn(editor, result) | |
} | |
show("Registered InferReturnTypeParameter, use ctrl+shift+T to run it") | |
static Result addInferredReturnTypeParameter(PsiMethod psiMethod, Project project) { | |
use(PsiMatchUtil){ | |
def returnTypeMatch = psiMethod.findChild{ | |
it.capturedAs("resultType"){ it.is(PsiTypeElement) && hasTypeParameters(it) && it.parent == psiMethod && it.hasChild{ | |
it.capturedAs("paramList"){ it.is(PsiReferenceParameterList) && it.parent.parent == resultType && it.typeArguments.size() == 0 } | |
}} | |
} | |
if (!returnTypeMatch.wasFound) return failure(psiElementsIn(returnTypeMatch)) | |
def returnExpressionMatches = psiMethod.findAllChildren{ | |
it.is(PsiReturnStatement) && it.hasChild{ | |
it.capturedAs("returnExpression"){ it.is(PsiExpression) | |
}} | |
} | |
def returnTypeParameters = returnExpressionMatches.collect{ it.returnExpression.type.parameters }.unique() | |
if (returnTypeParameters.size() != 1) return failure(psiElementsIn(returnTypeMatch) + psiElementsIn(returnExpressionMatches)) | |
runDocumentWriteAction(project){ | |
def text = "Xxx<" + returnTypeParameters.first().collect{ it.presentableText }.join(",") + ">" | |
def psiFactory = JavaPsiFacade.getElementFactory(project) | |
def newElement = psiFactory.createTypeElementFromText(text, psiMethod).innermostComponentReferenceElement.parameterList | |
returnTypeMatch.paramList = returnTypeMatch.paramList.replace(newElement) | |
} | |
return success(psiElementsIn(returnTypeMatch) + psiElementsIn(returnExpressionMatches), [returnTypeMatch.paramList]) | |
} | |
} | |
class PsiMatchUtil { | |
static ThreadLocal<Map> result = new ThreadLocal() { | |
@Override protected Object initialValue() { new HashMap() } | |
} | |
static ThreadLocal<Boolean> isFirstCallOnStack = new ThreadLocal() { | |
@Override protected Object initialValue() { true } | |
} | |
static Map getResult() { | |
result.get() | |
} | |
static saveResult(String id, value) { | |
getResult().put(id, value) | |
} | |
static boolean capturedAs(PsiElement element, String id, Closure match) { | |
def prevElement = saveResult(id, element) | |
def matched = match(element) | |
if (!matched) { | |
saveResult(id, prevElement) | |
} | |
matched | |
} | |
static def <T> T findParent(PsiElement element, Closure<T> match) { | |
if (element == null) null | |
else if (match(element)) element | |
else findParent(element.parent, match) | |
} | |
static List<Map> findAllChildren(PsiElement psiElement, Closure match) { | |
cleaningThreadLocal{ | |
match.delegate = getResult() | |
def results = childrenBreadthFirst(psiElement.children.toList()).findResults { | |
def matched = match(it) | |
if (matched) { | |
getResult().clone() | |
} | |
} | |
} | |
} | |
static Map findChild(PsiElement psiElement, Closure match) { | |
cleaningThreadLocal { | |
match.delegate = getResult() | |
def child = childrenBreadthFirst(psiElement.children.toList()).find{ match(it) } | |
saveResult("wasFound", child != null) | |
def result = getResult().clone() | |
} | |
} | |
static boolean hasChild(PsiElement psiElement, Closure match) { | |
findChild(psiElement, match).wasFound | |
} | |
static boolean is(PsiElement element, Class aClass) { | |
aClass.isAssignableFrom(element.class) | |
} | |
private static <T> T cleaningThreadLocal(Closure closure) { | |
def thisIsFirstCallOnStack = isFirstCallOnStack.get() | |
if (thisIsFirstCallOnStack) isFirstCallOnStack.set(false) | |
T result = closure.call() | |
if (thisIsFirstCallOnStack) { | |
isFirstCallOnStack.set(true) | |
getResult().clear() | |
} | |
result | |
} | |
private static Collection<PsiElement> childrenBreadthFirst(Collection<PsiElement> elements) { | |
List<PsiElement> list = new LinkedList(elements) | |
int i = 0 | |
while (i < list.size()) { | |
list.addAll(list[i].children.toList()) | |
i++ | |
} | |
list | |
} | |
static highlightIn(Editor editor, Result result) { | |
def textAttributes = new TextAttributes(Color.BLACK, Color.GREEN, Color.GREEN, EffectType.SEARCH_MATCH, Font.PLAIN) | |
HighlightUsagesHandler.doHighlightElements(editor, result.modifiedElements.toArray() as PsiElement[], textAttributes, false) | |
def textAttributes2 = new TextAttributes(Color.BLACK, Color.YELLOW, Color.YELLOW, EffectType.SEARCH_MATCH, Font.PLAIN) | |
HighlightUsagesHandler.doHighlightElements(editor, result.matchedElements.toArray() as PsiElement[], textAttributes2, false) | |
} | |
} | |
@Immutable class Result { | |
boolean successful | |
Collection<PsiElement> matchedElements = [] | |
Collection<PsiElement> modifiedElements = [] | |
static success(Collection<PsiElement> matchedElements = [], Collection<PsiElement> modifiedElements = []) { | |
new Result(true, matchedElements, modifiedElements) | |
} | |
static failure(Collection<PsiElement> matchedElements = []) { | |
new Result(false, matchedElements, []) | |
} | |
static Collection<PsiElement> psiElementsIn(Map map) { | |
psiElementsIn(map.values()) | |
} | |
static Collection<PsiElement> psiElementsIn(Collection values) { | |
values.collectMany{ | |
if (it instanceof PsiElement && it.valid) [it] | |
else if (it instanceof Map) psiElementsIn(it.values()) | |
else [null] | |
}.findAll{it != null} | |
} | |
} | |
static boolean hasTypeParameters(PsiTypeElement typeElement) { | |
def type = typeElement.type | |
if (type instanceof PsiClassType) { | |
type?.resolve()?.hasTypeParameters() | |
} else { | |
false | |
} | |
} | |
def testAddingReturnTypeParameter(project) { | |
def codeBefore = """ | |
import java.util.ArrayList; | |
import java.util.List; | |
class Some { | |
private List createList() { | |
ArrayList<String> strings = new ArrayList<String>(); | |
strings.add("abc"); | |
if (false) return strings; | |
if (false) return new ArrayList<String>(); | |
// ... | |
return strings; | |
} | |
} | |
""" | |
def codeAfter = """ | |
import java.util.ArrayList; | |
import java.util.List; | |
class Some { | |
private List<String> createList() { | |
ArrayList<String> strings = new ArrayList<String>(); | |
strings.add("abc"); | |
if (false) return strings; | |
if (false) return new ArrayList<String>(); | |
// ... | |
return strings; | |
} | |
} | |
""" | |
def fileFactory = PsiFileFactory.getInstance(project) | |
def psiFile = fileFactory.createFileFromText("Some.java", JAVA, codeBefore) | |
def psiMethod = ((PsiJavaFile) psiFile).classes.first().methods.first() | |
addInferredReturnTypeParameter(psiMethod, project).with { | |
assert successful | |
assert modifiedElements.collect{it.text} == ["<String>"] | |
} | |
assert psiFile.text == codeAfter | |
} | |
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