/*
Copyright 2011-2016 Google Inc. All Rights Reserved.

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.google.security.zynamics.zylib.gui.zygraph.realizers;

import com.google.security.zynamics.zylib.gui.zygraph.realizers.ZyLineContent.ObjectWrapper;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.nodes.ZyGraphNode;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.realizers.IZyNodeRealizer;

import java.awt.geom.Rectangle2D;

public class ZyNodeContentHelpers {

  public static Object getObject(final ZyGraphNode<?> node, final double x, final double y) {
    final ObjectWrapper wrapper = getObjectWrapper(node, x, y);
    return wrapper == null ? null : wrapper.getObject();
  }

  public static ZyLineContent.ObjectWrapper getObjectWrapper(final ZyGraphNode<?> node,
      final double x, final double y) {
    final IZyNodeRealizer realizer = node.getRealizer();
    final ZyLabelContent content = realizer.getNodeContent();

    final Rectangle2D bounds = content.getBounds();

    final double xScale = realizer.getWidth() / bounds.getWidth();

    final double yPos = y - node.getY();

    final int row = node.positionToRow(yPos);

    if (row == -1) {
      return null;
    }

    final ZyLineContent lineContent = content.getLineContent(row);

    final double position =
        (((x - node.getX()) / xScale) - content.getPaddingLeft()) / lineContent.getCharWidth();
    return lineContent.getObjectWrapper((int) position);
  }
}