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/*
* Copyright 2000-2014 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 com.intellij.find.findUsages;
import com.intellij.ide.DataManager;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.application.ReadActionProcessor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Computable;
import com.intellij.openapi.util.NullableComputable;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiNamedElement;
import com.intellij.psi.PsiReference;
import com.intellij.psi.PsiReferenceService;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.search.SearchScope;
import com.intellij.psi.search.searches.ReferencesSearch;
import com.intellij.psi.util.PsiUtilCore;
import com.intellij.refactoring.util.TextOccurrencesUtil;
import com.intellij.usageView.UsageInfo;
import com.intellij.util.Processor;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Collection;
import java.util.Collections;
/**
* @author peter
* @see com.intellij.find.findUsages.FindUsagesHandlerFactory
*/
public abstract class FindUsagesHandler {
// return this handler if you want to cancel the search
@NotNull
public static final FindUsagesHandler NULL_HANDLER = new FindUsagesHandler(PsiUtilCore.NULL_PSI_ELEMENT){};
@NotNull
private final PsiElement myPsiElement;
protected FindUsagesHandler(@NotNull PsiElement psiElement) {
myPsiElement = psiElement;
}
@NotNull
public AbstractFindUsagesDialog getFindUsagesDialog(boolean isSingleFile, boolean toShowInNewTab, boolean mustOpenInNewTab) {
return new CommonFindUsagesDialog(myPsiElement, getProject(), getFindUsagesOptions(DataManager.getInstance().getDataContext()),
toShowInNewTab, mustOpenInNewTab, isSingleFile, this);
}
@NotNull
public final PsiElement getPsiElement() {
return myPsiElement;
}
@NotNull
public final Project getProject() {
return myPsiElement.getProject();
}
@NotNull
public PsiElement[] getPrimaryElements() {
return new PsiElement[]{myPsiElement};
}
@NotNull
public PsiElement[] getSecondaryElements() {
return PsiElement.EMPTY_ARRAY;
}
@NotNull
public static FindUsagesOptions createFindUsagesOptions(@NotNull Project project, @Nullable final DataContext dataContext) {
FindUsagesOptions findUsagesOptions = new FindUsagesOptions(project, dataContext);
findUsagesOptions.isUsages = true;
findUsagesOptions.isSearchForTextOccurrences = true;
return findUsagesOptions;
}
@NotNull
public FindUsagesOptions getFindUsagesOptions() {
return getFindUsagesOptions(null);
}
@NotNull
public FindUsagesOptions getFindUsagesOptions(@Nullable final DataContext dataContext) {
FindUsagesOptions options = createFindUsagesOptions(getProject(), dataContext);
options.isSearchForTextOccurrences &= isSearchForTextOccurencesAvailable(getPsiElement(), false);
return options;
}
public boolean processElementUsages(@NotNull final PsiElement element,
@NotNull final Processor<UsageInfo> processor,
@NotNull final FindUsagesOptions options) {
final ReadActionProcessor<PsiReference> refProcessor = new ReadActionProcessor<PsiReference>() {
@Override
public boolean processInReadAction(final PsiReference ref) {
TextRange rangeInElement = ref.getRangeInElement();
return processor.process(new UsageInfo(ref.getElement(), rangeInElement.getStartOffset(), rangeInElement.getEndOffset(), false));
}
};
final SearchScope scope = options.searchScope;
final boolean searchText = options.isSearchForTextOccurrences && scope instanceof GlobalSearchScope;
if (options.isUsages) {
boolean success =
ReferencesSearch.search(new ReferencesSearch.SearchParameters(element, scope, false, options.fastTrack)).forEach(refProcessor);
if (!success) return false;
}
if (searchText) {
if (options.fastTrack != null) {
options.fastTrack.searchCustom(new Processor<Processor<PsiReference>>() {
@Override
public boolean process(Processor<PsiReference> consumer) {
return processUsagesInText(element, processor, (GlobalSearchScope)scope);
}
});
}
else {
return processUsagesInText(element, processor, (GlobalSearchScope)scope);
}
}
return true;
}
public boolean processUsagesInText(@NotNull final PsiElement element,
@NotNull Processor<UsageInfo> processor,
@NotNull GlobalSearchScope searchScope) {
Collection<String> stringToSearch = ApplicationManager.getApplication().runReadAction(new NullableComputable<Collection<String>>() {
@Override
public Collection<String> compute() {
return getStringsToSearch(element);
}
});
if (stringToSearch == null) return true;
final TextRange elementTextRange = ApplicationManager.getApplication().runReadAction(new NullableComputable<TextRange>() {
@Override
public TextRange compute() {
if (!element.isValid()) return null;
return element.getTextRange();
}
});
TextOccurrencesUtil.UsageInfoFactory factory = new TextOccurrencesUtil.UsageInfoFactory() {
@Override
public UsageInfo createUsageInfo(@NotNull PsiElement usage, int startOffset, int endOffset) {
if (elementTextRange != null
&& usage.getContainingFile() == element.getContainingFile()
&& elementTextRange.contains(startOffset)
&& elementTextRange.contains(endOffset)) {
return null;
}
PsiReference someReference = usage.findReferenceAt(startOffset);
if (someReference != null) {
PsiElement refElement = someReference.getElement();
for (PsiReference ref : PsiReferenceService.getService().getReferences(refElement, new PsiReferenceService.Hints(element, null))) {
if (element.getManager().areElementsEquivalent(ref.resolve(), element)) {
TextRange range = ref.getRangeInElement().shiftRight(refElement.getTextRange().getStartOffset() - usage.getTextRange().getStartOffset());
return new UsageInfo(usage, range.getStartOffset(), range.getEndOffset(), true);
}
}
}
return new UsageInfo(usage, startOffset, endOffset, true);
}
};
for (String s : stringToSearch) {
if (!TextOccurrencesUtil.processTextOccurences(element, s, searchScope, processor, factory)) return false;
}
return true;
}
@Nullable
protected Collection<String> getStringsToSearch(@NotNull final PsiElement element) {
if (element instanceof PsiNamedElement) {
return ApplicationManager.getApplication().runReadAction(new Computable<Collection<String>>() {
@Override
public Collection<String> compute() {
return ContainerUtil.createMaybeSingletonList(((PsiNamedElement)element).getName());
}
});
}
return Collections.singleton(element.getText());
}
protected boolean isSearchForTextOccurencesAvailable(@NotNull PsiElement psiElement, boolean isSingleFile) {
return false;
}
@NotNull
public Collection<PsiReference> findReferencesToHighlight(@NotNull PsiElement target, @NotNull SearchScope searchScope) {
return ReferencesSearch.search(target, searchScope, false).findAll();
}
}
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