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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.codeInsight.template.postfix.util.PostfixTemplatesUtils;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Pair;
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;
public abstract class ForIndexedPostfixTemplate extends PostfixTemplate {
protected ForIndexedPostfixTemplate(@NotNull String key, @NotNull String description, @NotNull String example) {
super(key, description, example);
}
@Override
public boolean isApplicable(@NotNull PsiElement context, @NotNull Document copyDocument, int newOffset) {
PsiExpression expr = getTopmostExpression(context);
return expr != null && (PostfixTemplatesUtils.isNumber(expr.getType()) ||
PostfixTemplatesUtils.isArray(expr.getType()) ||
PostfixTemplatesUtils.isIterable(expr.getType()));
}
@Override
public void expand(@NotNull PsiElement context, @NotNull Editor editor) {
PsiExpression expr = getTopmostExpression(context);
if (expr == null) {
PostfixTemplatesUtils.showErrorHint(context.getProject(), editor);
return;
}
Pair<String, String> bounds = calculateBounds(expr);
if (bounds == null) {
PostfixTemplatesUtils.showErrorHint(context.getProject(), editor);
return;
}
Project project = context.getProject();
Document document = editor.getDocument();
document.deleteString(expr.getTextRange().getStartOffset(), expr.getTextRange().getEndOffset());
TemplateManager manager = TemplateManager.getInstance(project);
Template template = manager.createTemplate("", "");
template.setToReformat(true);
template.addTextSegment("for (" + suggestIndexType(expr) + " ");
MacroCallNode index = new MacroCallNode(new SuggestVariableNameMacro());
String indexVariable = "index";
template.addVariable(indexVariable, index, index, true);
template.addTextSegment(" = " + bounds.first + "; ");
template.addVariableSegment(indexVariable);
template.addTextSegment(getComparativeSign(expr));
template.addTextSegment(bounds.second);
template.addTextSegment("; ");
template.addVariableSegment(indexVariable);
template.addTextSegment(getOperator());
template.addTextSegment(") {\n");
template.addEndVariable();
template.addTextSegment("\n}");
manager.startTemplate(editor, template);
}
@NotNull
protected abstract String getComparativeSign(@NotNull PsiExpression expr);
@Nullable
protected abstract Pair<String, String> calculateBounds(@NotNull PsiExpression expression);
@NotNull
protected abstract String getOperator();
@Nullable
protected static String getExpressionBound(@NotNull PsiExpression expr) {
PsiType type = expr.getType();
if (PostfixTemplatesUtils.isNumber(type)) {
return expr.getText();
}
else if (PostfixTemplatesUtils.isArray(type)) {
return expr.getText() + ".length";
}
else if (PostfixTemplatesUtils.isIterable(type)) {
return expr.getText() + ".size()";
}
return null;
}
@NotNull
private static String suggestIndexType(@NotNull PsiExpression expr) {
PsiType type = expr.getType();
if (PostfixTemplatesUtils.isNumber(type)) {
return type.getCanonicalText();
}
return "int";
}
}
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