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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.codeInsight.template.postfix.templates;
import com.intellij.codeInsight.template.Template;
import com.intellij.codeInsight.template.TemplateManager;
import com.intellij.codeInsight.template.impl.MacroCallNode;
import com.intellij.codeInsight.template.macro.SuggestVariableNameMacro;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.util.Condition;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiExpression;
import com.intellij.psi.PsiType;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import static com.intellij.codeInsight.template.postfix.util.JavaPostfixTemplatesUtils.*;
public abstract class ForIndexedPostfixTemplate extends StringBasedPostfixTemplate {
public static final Condition<PsiElement> IS_NUMBER_OR_ARRAY_OR_ITERABLE = new Condition<PsiElement>() {
@Override
public boolean value(PsiElement element) {
return IS_ITERABLE_OR_ARRAY.value(element) || IS_NUMBER.value(element);
}
};
protected ForIndexedPostfixTemplate(@NotNull String key, @NotNull String example) {
super(key, example, JAVA_PSI_INFO, IS_NUMBER_OR_ARRAY_OR_ITERABLE);
}
@Override
public void expandWithTemplateManager(TemplateManager manager, PsiElement expression, Editor editor) {
PsiExpression expr = (PsiExpression)expression;
String bound = getExpressionBound(expr);
if (bound == null) {
PostfixTemplatesUtils.showErrorHint(expr.getProject(), editor);
return;
}
String templateWithMacro = getStringTemplate(expr).replace("$bound$", bound).replace("$type$", suggestIndexType(expr));
Template template = manager.createTemplate("", "", templateWithMacro);
template.setToReformat(true);
MacroCallNode index = new MacroCallNode(new SuggestVariableNameMacro());
template.addVariable("index", index, index, true);
manager.startTemplate(editor, template);
}
@NotNull
protected abstract String getStringTemplate(@NotNull PsiExpression expr);
@Nullable
private static String getExpressionBound(@NotNull PsiExpression expr) {
PsiType type = expr.getType();
if (isNumber(type)) {
return expr.getText();
}
else if (isArray(type)) {
return expr.getText() + ".length";
}
else if (isIterable(type)) {
return expr.getText() + ".size()";
}
return null;
}
@NotNull
private static String suggestIndexType(@NotNull PsiExpression expr) {
PsiType type = expr.getType();
if (isNumber(type)) {
return type.getCanonicalText();
}
return "int";
}
}
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