/*
 * Copyright 2005 Red Hat, Inc. and/or its affiliates.
 *
 * 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.drools.eclipse.flow.common.editor.action;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

import org.drools.eclipse.flow.common.editor.GenericModelEditor;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.swt.SWT;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.actions.ActionDelegate;
import org.eclipse.ui.actions.WorkspaceModifyOperation;

/**
 * Action for exporting an image of a RuleFlow.
 */
public class ExportImageAction extends ActionDelegate implements IEditorActionDelegate {

    private IEditorPart editor;
    
    public void run(IAction action) {
        execute();
    }

    public void setActiveEditor(IAction action, IEditorPart targetEditor) {
        editor = targetEditor;
    }

    private void execute() {
        ExportImageDialog dialog = new ExportImageDialog(editor.getSite().getWorkbenchWindow().getShell());
        dialog.setOriginalFile(((IFileEditorInput) editor.getEditorInput()).getFile());
        dialog.open();
        IPath path = dialog.getResult();

        if (path == null) {
            return;
        }

        IWorkspace workspace = ResourcesPlugin.getWorkspace();
        final IFile file = workspace.getRoot().getFile(path);

        WorkspaceModifyOperation op = new WorkspaceModifyOperation() {
            public void execute(final IProgressMonitor monitor)
                    throws CoreException {
                try {
                    ByteArrayOutputStream out = new ByteArrayOutputStream();
                    ((GenericModelEditor) editor).createImage(out, SWT.IMAGE_PNG);
                    file.create(new ByteArrayInputStream(out.toByteArray()), true, monitor);
                    out.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };

        try {
            new ProgressMonitorDialog(editor.getSite().getWorkbenchWindow().getShell()).run(false, true, op);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
}
