/*
* Copyright 2012-2014 Sergey Ignatov
*
* 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 org.intellij.erlang.quickfixes;
import com.intellij.codeInsight.template.Template;
import com.intellij.codeInsight.template.TemplateManager;
import com.intellij.codeInsight.template.impl.ConstantNode;
import com.intellij.codeInspection.ProblemDescriptor;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiElement;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.PsiUtilBase;
import org.intellij.erlang.psi.ErlangFile;
import org.intellij.erlang.psi.ErlangMacros;
import org.intellij.erlang.psi.ErlangMacrosDefinition;
import org.intellij.erlang.psi.ErlangMacrosName;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public class ErlangIntroduceMacroQuickFix extends ErlangQuickFixBase {
@NotNull
@Override
public String getFamilyName() {
return "Introduce macro";
}
@Override
public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
PsiElement psiElement = descriptor.getPsiElement();
if (!(psiElement instanceof ErlangMacros)) return;
PsiElement file = psiElement.getContainingFile();
if (file instanceof ErlangFile) {
insertMacroDefinition(project, (ErlangMacros) psiElement, (ErlangFile) file);
}
}
private static void insertMacroDefinition(Project project, ErlangMacros macro, ErlangFile file) {
Editor editor = PsiUtilBase.findEditor(file);
String macroName = getMacroName(macro);
if (editor == null || macroName == null) return;
int offset = getFirstMacroDefinitionOffset(file);
int topLevelOffset = getTopLevelElementOffset(macro, file);
if (offset == -1 || topLevelOffset < offset) {
offset = topLevelOffset;
editor.getDocument().insertString(offset, "\n");
}
Template template = createMacroDefinitionTemplate(project, macroName);
editor.getCaretModel().moveToOffset(offset);
TemplateManager.getInstance(project).startTemplate(editor, template);
}
private static int getTopLevelElementOffset(ErlangMacros macro, ErlangFile file) {
PsiElement element = macro;
while (element != null && element.getParent() != file) {
element = element.getParent();
}
return element == null ? 0 : element.getTextRange().getStartOffset();
}
@Nullable
private static String getMacroName(ErlangMacros macro) {
ErlangMacrosName macroNamePsi = macro.getMacrosName();
return macroNamePsi != null ? macroNamePsi.getText() : null;
}
private static int getFirstMacroDefinitionOffset(ErlangFile file) {
PsiElement elementBefore = PsiTreeUtil.getChildOfType(file, ErlangMacrosDefinition.class);
return null == elementBefore ? -1 : elementBefore.getTextRange().getStartOffset();
}
private static Template createMacroDefinitionTemplate(Project project, String macroName) {
TemplateManager templateManager = TemplateManager.getInstance(project);
Template template = templateManager.createTemplate("", "");
template.setToReformat(true);
template.addTextSegment("-define(" + macroName + ", ");
template.addVariable("macro_body", new ConstantNode("macro_body"), true);
template.addTextSegment(").");
template.addEndVariable();
template.addTextSegment("\n");
return template;
}
}