/*
* Copyright 2000-2016 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.codeInsight.template.postfix.util;
import com.intellij.codeInsight.CodeInsightServicesUtil;
import com.intellij.codeInsight.template.postfix.templates.PostfixTemplateExpressionSelector;
import com.intellij.codeInsight.template.postfix.templates.PostfixTemplateExpressionSelectorBase;
import com.intellij.codeInsight.template.postfix.templates.PostfixTemplatePsiInfo;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.project.DumbService;
import com.intellij.openapi.util.Condition;
import com.intellij.openapi.util.Conditions;
import com.intellij.psi.*;
import com.intellij.psi.util.InheritanceUtil;
import com.intellij.psi.util.PsiExpressionTrimRenderer;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.PsiUtil;
import com.intellij.refactoring.introduceVariable.IntroduceVariableBase;
import com.intellij.util.Function;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.Contract;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Collections;
import java.util.List;
import static com.intellij.openapi.util.Conditions.and;
public abstract class JavaPostfixTemplatesUtils {
private JavaPostfixTemplatesUtils() {
}
public static PostfixTemplateExpressionSelector atLeastJava8Selector(final PostfixTemplateExpressionSelector selector) {
return new PostfixTemplateExpressionSelector() {
@Override
public boolean hasExpression(@NotNull PsiElement context, @NotNull Document copyDocument, int newOffset) {
return PsiUtil.isLanguageLevel8OrHigher(context) && selector.hasExpression(context, copyDocument, newOffset);
}
@NotNull
@Override
public List<PsiElement> getExpressions(@NotNull PsiElement context, @NotNull Document document, int offset) {
return PsiUtil.isLanguageLevel8OrHigher(context)
? selector.getExpressions(context, document, offset)
: Collections.emptyList();
}
@NotNull
@Override
public Function<PsiElement, String> getRenderer() {
return selector.getRenderer();
}
};
}
public static PostfixTemplateExpressionSelector selectorTopmost() {
return selectorTopmost(Conditions.alwaysTrue());
}
public static PostfixTemplateExpressionSelector selectorTopmost(Condition<PsiElement> additionalFilter) {
return new PostfixTemplateExpressionSelectorBase(additionalFilter) {
@Override
protected List<PsiElement> getNonFilteredExpressions(@NotNull PsiElement context, @NotNull Document document, int offset) {
return ContainerUtil.createMaybeSingletonList(getTopmostExpression(context));
}
@Override
protected Condition<PsiElement> getFilters(int offset) {
return and(super.getFilters(offset), getPsiErrorFilter());
}
@NotNull
@Override
public Function<PsiElement, String> getRenderer() {
return JavaPostfixTemplatesUtils.getRenderer();
}
};
}
public static PostfixTemplateExpressionSelector selectorAllExpressionsWithCurrentOffset() {
return selectorAllExpressionsWithCurrentOffset(Conditions.alwaysTrue());
}
public static PostfixTemplateExpressionSelector selectorAllExpressionsWithCurrentOffset(final Condition<PsiElement> additionalFilter) {
return new PostfixTemplateExpressionSelectorBase(additionalFilter) {
@Override
protected List<PsiElement> getNonFilteredExpressions(@NotNull PsiElement context, @NotNull Document document, int offset) {
return ContainerUtil.newArrayList(IntroduceVariableBase.collectExpressions(context.getContainingFile(), document,
Math.max(offset - 1, 0), false));
}
@NotNull
@Override
public List<PsiElement> getExpressions(@NotNull PsiElement context, @NotNull Document document, int offset) {
if (DumbService.getInstance(context.getProject()).isDumb()) return Collections.emptyList();
List<PsiElement> expressions = super.getExpressions(context, document, offset);
if (!expressions.isEmpty()) return expressions;
return ContainerUtil.filter(ContainerUtil.<PsiElement>createMaybeSingletonList(getTopmostExpression(context)), getFilters(offset));
}
@NotNull
@Override
public Function<PsiElement, String> getRenderer() {
return JavaPostfixTemplatesUtils.getRenderer();
}
};
}
public static final PostfixTemplatePsiInfo JAVA_PSI_INFO = new PostfixTemplatePsiInfo() {
@NotNull
@Override
public PsiElement createExpression(@NotNull PsiElement context,
@NotNull String prefix,
@NotNull String suffix) {
PsiElementFactory factory = JavaPsiFacade.getInstance(context.getProject()).getElementFactory();
return factory.createExpressionFromText(prefix + context.getText() + suffix, context);
}
@NotNull
@Override
public PsiExpression getNegatedExpression(@NotNull PsiElement element) {
assert element instanceof PsiExpression;
return CodeInsightServicesUtil.invertCondition((PsiExpression)element);
}
};
public static final Condition<PsiElement> IS_NUMBER =
element -> element instanceof PsiExpression && isNumber(((PsiExpression)element).getType());
public static final Condition<PsiElement> IS_BOOLEAN =
element -> element instanceof PsiExpression && isBoolean(((PsiExpression)element).getType());
public static final Condition<PsiElement> IS_THROWABLE =
element -> element instanceof PsiExpression && isThrowable(((PsiExpression)element).getType());
public static final Condition<PsiElement> IS_NON_VOID =
element -> element instanceof PsiExpression && isNonVoid(((PsiExpression)element).getType());
public static final Condition<PsiElement> IS_NOT_PRIMITIVE =
element -> element instanceof PsiExpression && isNotPrimitiveTypeExpression((PsiExpression)element);
public static final Condition<PsiElement> IS_ARRAY = element -> {
if (!(element instanceof PsiExpression)) return false;
PsiType type = ((PsiExpression)element).getType();
return isArray(type);
};
public static final Condition<PsiElement> IS_ITERABLE_OR_ARRAY = element -> {
if (!(element instanceof PsiExpression)) return false;
PsiType type = ((PsiExpression)element).getType();
return isArray(type) || isIterable(type);
};
@Contract("null -> false")
public static boolean isNotPrimitiveTypeExpression(@Nullable PsiExpression expression) {
if (expression == null) {
return false;
}
PsiType type = expression.getType();
return type != null && !(type instanceof PsiPrimitiveType);
}
@Contract("null -> false")
public static boolean isIterable(@Nullable PsiType type) {
return type != null && InheritanceUtil.isInheritor(type, CommonClassNames.JAVA_LANG_ITERABLE);
}
@Contract("null -> false")
public static boolean isThrowable(@Nullable PsiType type) {
return type != null && InheritanceUtil.isInheritor(type, CommonClassNames.JAVA_LANG_THROWABLE);
}
@Contract("null -> false")
public static boolean isArray(@Nullable PsiType type) {
return type != null && type instanceof PsiArrayType;
}
@Contract("null -> false")
public static boolean isBoolean(@Nullable PsiType type) {
return type != null && (PsiType.BOOLEAN.equals(type) || PsiType.BOOLEAN.equals(PsiPrimitiveType.getUnboxedType(type)));
}
@Contract("null -> false")
public static boolean isNonVoid(@Nullable PsiType type) {
return type != null && !PsiType.VOID.equals(type);
}
@Contract("null -> false")
public static boolean isNumber(@Nullable PsiType type) {
if (type == null) {
return false;
}
if (PsiType.INT.equals(type) || PsiType.BYTE.equals(type) || PsiType.LONG.equals(type)) {
return true;
}
PsiPrimitiveType unboxedType = PsiPrimitiveType.getUnboxedType(type);
return PsiType.INT.equals(unboxedType) || PsiType.BYTE.equals(unboxedType) || PsiType.LONG.equals(unboxedType);
}
@NotNull
public static Function<PsiElement, String> getRenderer() {
return element -> {
assert element instanceof PsiExpression;
return new PsiExpressionTrimRenderer.RenderFunction().fun((PsiExpression)element);
};
}
@Nullable
public static PsiExpression getTopmostExpression(PsiElement context) {
PsiExpressionStatement statement = PsiTreeUtil.getNonStrictParentOfType(context, PsiExpressionStatement.class);
return statement != null ? statement.getExpression() : null;
}
}