package com.simpleplugin;
import com.intellij.lang.ASTNode;
import com.intellij.lang.folding.FoldingBuilderEx;
import com.intellij.lang.folding.FoldingDescriptor;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.FoldingGroup;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiLiteralExpression;
import com.intellij.psi.util.PsiTreeUtil;
import com.simpleplugin.psi.SimpleProperty;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
public class SimpleFoldingBuilder extends FoldingBuilderEx {
@NotNull
@Override
public FoldingDescriptor[] buildFoldRegions(@NotNull PsiElement root, @NotNull Document document, boolean quick) {
FoldingGroup group = FoldingGroup.newGroup("simple");
List<FoldingDescriptor> descriptors = new ArrayList<FoldingDescriptor>();
Collection<PsiLiteralExpression> literalExpressions = PsiTreeUtil.findChildrenOfType(root, PsiLiteralExpression.class);
for (final PsiLiteralExpression literalExpression : literalExpressions) {
String value = (String) literalExpression.getValue();
if (value != null && value.startsWith("simple:")) {
Project project = literalExpression.getProject();
final List<SimpleProperty> properties = SimpleUtil.findProperties(project, value.substring(7));
if (properties.size() == 1) {
descriptors.add(new FoldingDescriptor(literalExpression.getNode(),
new TextRange(literalExpression.getTextRange().getStartOffset() + 1,
literalExpression.getTextRange().getEndOffset() - 1), group) {
@Nullable
@Override
public String getPlaceholderText() {
return properties.get(0).getValue();
}
});
}
}
}
return descriptors.toArray(new FoldingDescriptor[descriptors.size()]);
}
@Nullable
@Override
public String getPlaceholderText(@NotNull ASTNode node) {
return "...";
}
@Override
public boolean isCollapsedByDefault(@NotNull ASTNode node) {
return true;
}
}