app/code/core/Mage/Adminhtml/Block/Newsletter/Queue/Edit.php

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<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @copyright  Copyright (c) 2008 Irubin Consulting Inc. DBA Varien (http://www.varien.com)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Adminhtml newsletter queue edit block
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author      Magento Core Team <core@magentocommerce.com>
 */

class Mage_Adminhtml_Block_Newsletter_Queue_Edit extends Mage_Adminhtml_Block_Template
{
    /**
     * Retrieve current Newsletter Queue Object
     *
     * @return Mage_Newsletter_Model_Queue
     */
    public function getQueue()
    {
        return Mage::registry('current_queue');
    }

    protected  function _beforeToHtml() {

        $this->setTemplate('newsletter/queue/edit.phtml');

        $this->setChild('form',
            $this->getLayout()->createBlock('adminhtml/newsletter_queue_edit_form','form')
        );

        return parent::_beforeToHtml();
    }

    public function getSaveUrl()
    {
        return $this->getUrl('*/*/save',array('id'=>$this->getRequest()->getParam('id')));
    }

    protected function _prepareLayout()
    {
        $this->setChild('save_button',
            $this->getLayout()->createBlock('adminhtml/widget_button')
                ->setData(array(
                    'label'     => Mage::helper('newsletter')->__('Save Newsletter'),
                    'onclick'   => 'queueControl.save()',
                    'class'     => 'save'
                ))
        );

        $this->setChild('save_and_resume',
            $this->getLayout()->createBlock('adminhtml/widget_button')
                ->setData(array(
                    'label'     => Mage::helper('newsletter')->__('Save And Resume'),
                    'onclick'   => 'queueControl.resume()',
                    'class'     => 'save'
                ))
        );

        $this->setChild('reset_button',
            $this->getLayout()->createBlock('adminhtml/widget_button')
                ->setData(array(
                    'label'     => Mage::helper('newsletter')->__('Reset'),
                    'onclick'   => 'window.location = window.location'
                ))
        );

        $this->setChild('back_button',
            $this->getLayout()->createBlock('adminhtml/widget_button')
                ->setData(
                    array(
                        'label'   => Mage::helper('newsletter')->__('Back'),
                        'onclick' => "window.location.href = '" . $this->getUrl('*/*') . "'",
                        'class'     => 'back'
                    )
                )
        );

        $this->setChild('toggle_button',
            $this->getLayout()->createBlock('adminhtml/widget_button')
                ->setData(
                    array(
                        'label'   => Mage::helper('newsletter')->__('Toggle Editor'),
                        'onclick' => 'queueControl.toggleEditor();'
                    )
                )
        );
        return parent::_prepareLayout();
    }

    public function getToggleButtonHtml()
    {
        return $this->getChildHtml('toggle_button');
    }

    public function getSaveButtonHtml()
    {
        return $this->getChildHtml('save_button');
    }

    public function getResetButtonHtml()
    {
        return $this->getChildHtml('reset_button');
    }

    public function getBackButtonHtml()
    {
        return $this->getChildHtml('back_button');
    }

    public function getResumeButtonHtml()
    {
        return $this->getChildHtml('save_and_resume');
    }

    public function getIsPreview()
    {
        return !in_array($this->getQueue()->getQueueStatus(), array(
            Mage_Newsletter_Model_Queue::STATUS_NEVER,
            Mage_Newsletter_Model_Queue::STATUS_PAUSE
        ));
    }

    public function getIsTextType()
    {
        return $this->getQueue()->getTemplate()->isPlain();
    }

    public function getCanResume()
    {
        return in_array($this->getQueue()->getQueueStatus(), array(
            Mage_Newsletter_Model_Queue::STATUS_PAUSE
        ));
    }

    public function getHeaderText()
    {
        return ( $this->getIsPreview() ? Mage::helper('newsletter')->__('View Newsletter') : Mage::helper('newsletter')->__('Edit Newsletter'));
    }
}// Class Mage_Adminhtml_Block_Newsletter_Queue_Edit END

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