/*
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.yfileswrap.gui.zygraph.editmode.actions;

import com.google.security.zynamics.binnavi.CUtilityFunctions;
import com.google.security.zynamics.zylib.gui.zygraph.editmode.IStateAction;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.AbstractZyGraph;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.IZyEditModeListener;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.edges.ZyGraphEdge;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.helpers.CEdgeHighlighter;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.helpers.CNodeHighlighter;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.states.CNodeExitState;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.nodes.ZyGraphNode;

import y.base.Node;

import java.awt.event.MouseEvent;

/**
 * Describes the default actions which are executed as soon as the mouse cursor exits a node.
 */
public class CDefaultNodeExitAction<NodeType extends ZyGraphNode<?>, EdgeType extends ZyGraphEdge<?, ?, ?>>
    implements IStateAction<CNodeExitState<NodeType, EdgeType>> {
  /**
   * Clears the tool tip of a graph.
   * 
   * @param graph The graph whose tool tip is cleared.
   */
  protected void clearTooltip(final AbstractZyGraph<?, ?> graph) {
    graph.getView().setToolTipText(null);
  }

  /**
   * Removes highlighting from the edges attached to a node.
   * 
   * @param node The node that was exited.
   */
  protected void unhighlightEdges(final Node node) {
    CEdgeHighlighter.highlightEdgesOfNode(node, false);
  }

  /**
   * Removes highlighting from the node that was exited.
   * 
   * @param node The node that was exited.
   */
  protected void unhighlightNode(final Node node) {
    CNodeHighlighter.highlightNode(node, false);
  }

  @Override
  public void execute(final CNodeExitState<NodeType, EdgeType> state, final MouseEvent event) {
    clearTooltip(state.getGraph());

    if (state.getNode().getGraph() != null) {
      // It's possible that the node was removed from the graph.

      unhighlightNode(state.getNode());
      unhighlightEdges(state.getNode());
    }

    final NodeType node = state.getGraph().getNode(state.getNode());

    if (node != null) {
      for (final IZyEditModeListener<NodeType, EdgeType> listener : state.getStateFactory()
          .getListeners()) {
        // ESCA-JAVA0166: Catch Exception because we are calling a listener function
        try {
          listener.nodeLeft(node);
        } catch (final Exception exception) {
          CUtilityFunctions.logException(e);
        }
      }
    }


    state.getGraph().updateViews();
  }
}
