content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  package com.itsaky.androidide.lsp.java.visitors;
  
  import openjdk.source.tree.ClassTree;
  import openjdk.source.tree.CompilationUnitTree;
  import openjdk.source.util.JavacTask;
  import openjdk.source.util.SourcePositions;
  import openjdk.source.util.TreePath;
  import openjdk.source.util.TreePathScanner;
  import openjdk.source.util.Trees;
  
  public class FindTypeDeclarationAt extends TreePathScanner<ClassTree, Long> {
    private final SourcePositions pos;
    private CompilationUnitTree root;
  
    private TreePath path;
  
    public FindTypeDeclarationAt(JavacTask task) {
      pos = Trees.instance(task).getSourcePositions();
    }
  
    @Override
    public ClassTree reduce(ClassTree a, ClassTree b) {
      if (a != null) return a;
      return b;
    }
  
    @Override
    public ClassTree visitCompilationUnit(CompilationUnitTree t, Long find) {
      root = t;
      return super.visitCompilationUnit(t, find);
    }
  
    @Override
    public ClassTree visitClass(ClassTree t, Long find) {
      ClassTree smaller = super.visitClass(t, find);
      if (smaller != null) {
        return smaller;
      }
      if (pos.getStartPosition(root, t) <= find && find < pos.getEndPosition(root, t)) {
        this.path = getCurrentPath();
        return t;
      }
      return null;
    }
  
    public TreePath getPath() {
      return path;
    }
  }
  