/*
* Copyright 2011-2014 Gregory Shrago
*
* 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.grammar.livePreview;
import com.intellij.ide.structureView.*;
import com.intellij.ide.structureView.impl.common.PsiTreeElementBase;
import com.intellij.ide.util.treeView.smartTree.SortableTreeElement;
import com.intellij.lang.ASTNode;
import com.intellij.lang.PsiStructureViewFactory;
import com.intellij.navigation.ColoredItemPresentation;
import com.intellij.openapi.editor.colors.CodeInsightColors;
import com.intellij.openapi.editor.colors.TextAttributesKey;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiErrorElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiWhiteSpace;
import com.intellij.psi.impl.source.tree.LeafPsiElement;
import com.intellij.psi.tree.IElementType;
import org.intellij.grammar.BnfIcons;
import org.intellij.grammar.psi.BnfFile;
import org.intellij.grammar.psi.BnfRule;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import javax.swing.*;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import static org.intellij.grammar.generator.ParserGeneratorUtil.getPsiClassPrefix;
import static org.intellij.grammar.generator.ParserGeneratorUtil.getRulePsiClassName;
/**
* @author gregsh
*/
public class LivePreviewStructureViewFactory implements PsiStructureViewFactory {
@Nullable
public StructureViewBuilder getStructureViewBuilder(final PsiFile psiFile) {
if (!(psiFile.getLanguage() instanceof LivePreviewLanguage)) return null;
return new TreeBasedStructureViewBuilder() {
@NotNull
@Override
public StructureViewModel createStructureViewModel() {
return new MyModel(psiFile);
}
@Override
public boolean isRootNodeShown() {
return false;
}
};
}
private static class MyModel extends StructureViewModelBase implements StructureViewModel.ElementInfoProvider{
protected MyModel(@NotNull PsiFile psiFile) {
super(psiFile, new MyElement(psiFile));
withSuitableClasses(PsiElement.class);
}
@Override
public boolean shouldEnterElement(Object element) {
return true;
}
@Override
public boolean isAlwaysShowsPlus(StructureViewTreeElement element) {
return false;
}
@Override
public boolean isAlwaysLeaf(StructureViewTreeElement element) {
return element.getValue() instanceof LeafPsiElement;
}
}
private static class MyElement extends PsiTreeElementBase<PsiElement> implements SortableTreeElement, ColoredItemPresentation {
MyElement(PsiElement element) {
super(element);
}
@NotNull
public Collection<StructureViewTreeElement> getChildrenBase() {
PsiElement element = getElement();
if (element == null || element instanceof LeafPsiElement) return Collections.emptyList();
ArrayList<StructureViewTreeElement> result = new ArrayList<StructureViewTreeElement>();
for (PsiElement e = element.getFirstChild(); e != null; e = e.getNextSibling()) {
if (e instanceof PsiWhiteSpace) continue;
result.add(new MyElement(e));
}
return result;
}
@Override
public String getAlphaSortKey() {
return getPresentableText();
}
@NotNull
@Override
public String getPresentableText() {
PsiElement element = getElement();
ASTNode node = element != null ? element.getNode() : null;
IElementType elementType = node != null ? node.getElementType() : null;
if (element instanceof LeafPsiElement) {
return elementType + ": '" + element.getText() + "'";
}
else if (element instanceof PsiErrorElement) {
return "PsiErrorElement: '" + ((PsiErrorElement)element).getErrorDescription() + "'";
}
else if (elementType instanceof LivePreviewParser.RuleElementType) {
BnfRule rule = ((LivePreviewParser.RuleElementType)elementType).rule;
String prefix = getPsiClassPrefix((BnfFile)rule.getContainingFile());
String className = getRulePsiClassName(rule, prefix);
return className + ": '" + StringUtil.first(element.getText(), 30, true) +"'";
}
return elementType + "";
}
@Nullable
@Override
public String getLocationString() {
return null;
}
@Nullable
@Override
public Icon getIcon(boolean unused) {
PsiElement element = getElement();
if (element instanceof PsiErrorElement) {
return null; //AllIcons.General.Error;
}
else if (element instanceof LeafPsiElement) {
return null;
}
ASTNode node = element != null ? element.getNode() : null;
IElementType elementType = node != null ? node.getElementType() : null;
if (elementType instanceof LivePreviewParser.RuleElementType) {
return BnfIcons.RULE;
}
return null;
}
@Nullable
@Override
public TextAttributesKey getTextAttributesKey() {
return getElement() instanceof PsiErrorElement? CodeInsightColors.ERRORS_ATTRIBUTES : null;
}
}
}