<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 *
 * @version $Id$
 * @package phpMyAdmin
 */

/**
 * This Class interacts with the user to gather the information
 * about their tables for which they want to export the relational schema
 * export options are shown to user from they can choose
 *
 * @name
 * @author Muhammad Adnan <hiddenpearls@gmail.com>
 * @copyright
 * @license
 */

class PMA_User_Schema
{	
    /**
     * This function will process the user defined pages
     * and tables which will be exported as Relational schema
     * you can set the table positions on the paper via scratchboard
     * for table positions, put the x,y co-ordinates
     * 
     * @param string $do It tells what the Schema is supposed to do
     *                  create and select a page, generate schema etc
     * @access public
     */

    public function processUserPreferences($do)
    {
    global $action_choose,$chpage,$db,$cfgRelation,$cfg,$auto_layout_foreign,$auto_layout_internal,$newpage,$c_table_rows,$query_default_option;

    if (isset($do)) {
        switch ($do) {
        case 'selectpage':
            if ($action_choose=="1") {
                $ch_query = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_coords'])
                           .   ' WHERE db_name = \'' . PMA_sqlAddslashes($db) . '\''
                           .   ' AND   pdf_page_number = \'' . PMA_sqlAddslashes($chpage) . '\'';
                PMA_query_as_controluser($ch_query, FALSE, $query_default_option);

                $ch_query = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['pdf_pages'])
                           .   ' WHERE db_name = \'' . PMA_sqlAddslashes($db) . '\''
                           .   ' AND   page_nr = \'' . PMA_sqlAddslashes($chpage) . '\'';
                PMA_query_as_controluser($ch_query, FALSE, $query_default_option);

                unset($chpage);
            }
        break;
        case 'createpage':
            $pdf_page_number = PMA_REL_create_page($newpage, $cfgRelation, $db, $query_default_option);

            /*
			 * A u t o m a t i c    l a y o u t
             *
             * There are 2 kinds of relations in PMA
             * 1) Internal Relations 2) Foreign Key Relations
			 */
            if (isset($auto_layout_internal) || isset($auto_layout_foreign)) {
                $all_tables = array();
            }

            if (isset($auto_layout_foreign)) {
                /*
                 * get the tables list
                 * who support FOREIGN KEY, it's not
                 * important that we group together InnoDB tables
                 * and PBXT tables, as this logic is just to put
                 * the tables on the layout, not to determine relations
                 */
                $tables = PMA_DBI_get_tables_full($db);
                $foreignkey_tables = array();
                foreach($tables as $table_name => $table_properties) {
                        if (PMA_foreignkey_supported($table_properties['ENGINE'])) {
                            $foreignkey_tables[] = $table_name;
                        }
                }
                $all_tables = $foreignkey_tables;
                    // could be improved by finding the tables which have the
                    // most references keys and placing them at the beginning
                    // of the array (so that they are all center of schema)
                unset($tables, $foreignkey_tables);
            }

            if (isset($auto_layout_internal)) {
                /*
                 * get the tables list who support Internal Relations;
                 * This type of relations will be created when 
                 * you setup the PMA tables correctly
                 */
                $master_tables = 'SELECT COUNT(master_table), master_table'
                                . ' FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation'])
                                . ' WHERE master_db = \'' . $db . '\''
                                . ' GROUP BY master_table'
                                . ' ORDER BY ' . PMA_backquote('COUNT(master_table)') . ' DESC ';
                $master_tables_rs = PMA_query_as_controluser($master_tables, FALSE, $query_default_option);
                if ($master_tables_rs && PMA_DBI_num_rows($master_tables_rs) > 0) {
                    /* first put all the master tables at beginning
                     * of the list, so they are near the center of
                     * the schema
					 */
                    while (list(, $master_table) = PMA_DBI_fetch_row($master_tables_rs)) {
                        $all_tables[] = $master_table;
                    }

                    /* Now for each master, add its foreigns into an array
                     * of foreign tables, if not already there
                     * (a foreign might be foreign for more than
                     * one table, and might be a master itself)
					 */	

                    $foreign_tables = array();
                    foreach ($all_tables as $master_table) {
                            $foreigners = PMA_getForeigners($db, $master_table);
                            foreach ($foreigners as $foreigner) {
                                if (!in_array($foreigner['foreign_table'], $foreign_tables)) {
                                    $foreign_tables[] = $foreigner['foreign_table'];
                                }
                            }
                    }

                    /*
					 * Now merge the master and foreign arrays/tables 
					 */ 
                    foreach ($foreign_tables as $foreign_table) {
                            if (!in_array($foreign_table, $all_tables)) {
                                $all_tables[] = $foreign_table;
                            }
                    }
                } // endif there are master tables
            } // endif auto_layout_internal

            if (isset($auto_layout_internal) || isset($auto_layout_foreign)) {
                /*
                 * Now generate the coordinates for the schema
                 * in a clockwise spiral
                 */
                $pos_x = 300;
                $pos_y = 300;
                $delta = 110;
                $delta_mult = 1.10;
                $direction = "right";
                foreach ($all_tables as $current_table) {
                        /*
                         * save current table's coordinates
                         */
                        $insert_query = 'INSERT INTO ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_coords']) . ' '
                                      . '(db_name, table_name, pdf_page_number, x, y) '
                                      . 'VALUES (\'' . PMA_sqlAddslashes($db) . '\', \'' . PMA_sqlAddslashes($current_table) . '\',' . $pdf_page_number . ',' . $pos_x . ',' . $pos_y . ')';
                        PMA_query_as_controluser($insert_query, FALSE, $query_default_option);

                        /*
                         * compute for the next table
                         */
                        switch ($direction) {
                        case 'right':
                            $pos_x += $delta;
                            $direction = "down";
                            $delta *= $delta_mult;
                            break;
                        case 'down':
                            $pos_y += $delta;
                            $direction = "left";
                            $delta *= $delta_mult;
                            break;
                        case 'left':
                            $pos_x -= $delta;
                            $direction = "up";
                            $delta *= $delta_mult;
                            break;
                        case 'up':
                            $pos_y -= $delta;
                            $direction = "right";
                            $delta *= $delta_mult;
                            break;
                        } // end switch
                } // end foreach
            } // end if some auto-layout to do

            $chpage = $pdf_page_number;
            break;

        case 'edcoord':
            for ($i = 0; $i < $c_table_rows; $i++) {
                $arrvalue = 'c_table_' . $i;
				global $$arrvalue;
                $arrvalue = $$arrvalue;
                if (!isset($arrvalue['x']) || $arrvalue['x'] == '') {
                    $arrvalue['x'] = 0;
                }
                if (!isset($arrvalue['y']) || $arrvalue['y'] == '') {
                    $arrvalue['y'] = 0;
                }
                if (isset($arrvalue['name']) && $arrvalue['name'] != '--') {
                    $test_query = 'SELECT * FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_coords'])
                                .   ' WHERE db_name = \'' .  PMA_sqlAddslashes($db) . '\''
                                .   ' AND   table_name = \'' . PMA_sqlAddslashes($arrvalue['name']) . '\''
                                .   ' AND   pdf_page_number = \'' . PMA_sqlAddslashes($chpage) . '\'';
                    // echo $test_query;
					$test_rs    = PMA_query_as_controluser($test_query, FALSE, $query_default_option);
                    if ($test_rs && PMA_DBI_num_rows($test_rs) > 0) {
                        if (isset($arrvalue['delete']) && $arrvalue['delete'] == 'y') {
                            $ch_query = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_coords'])
                                      .   ' WHERE db_name = \'' . PMA_sqlAddslashes($db) . '\''
                                      .   ' AND   table_name = \'' . PMA_sqlAddslashes($arrvalue['name']) . '\''
                                      .   ' AND   pdf_page_number = \'' . PMA_sqlAddslashes($chpage) . '\'';
                        } else {                     
					    $ch_query = 'UPDATE ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_coords']) . ' '
                                  . 'SET x = ' . $arrvalue['x'] . ', y= ' . $arrvalue['y']
                                  .   ' WHERE db_name = \'' . PMA_sqlAddslashes($db) . '\''
                                  .   ' AND   table_name = \'' . PMA_sqlAddslashes($arrvalue['name']) . '\''
                                  .   ' AND   pdf_page_number = \'' . PMA_sqlAddslashes($chpage) . '\'';
                        }
                    } else {
                    $ch_query     = 'INSERT INTO ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_coords']) . ' '
                                  . '(db_name, table_name, pdf_page_number, x, y) '
                                  . 'VALUES (\'' . PMA_sqlAddslashes($db) . '\', \'' . PMA_sqlAddslashes($arrvalue['name']) . '\', \'' . PMA_sqlAddslashes($chpage) . '\',' . $arrvalue['x'] . ',' . $arrvalue['y'] . ')';
                    }
					//echo $ch_query;
                PMA_query_as_controluser($ch_query, FALSE, $query_default_option);
                } // end if
            } // end for
            break;

        case 'deleteCrap':
            $this->_deleteTableRows();
            break;

        case 'process_export':
		    $this->_processExportSchema();
			break;

        } // end switch
    } // end if (isset($do))

	}
	
    /**
     * shows/displays the HTML FORM to create the page 
     *
     * @access public
     */

	public function createPage()
	{
        global $db,$table;
        ?>
        <form method="post" action="export_relation_schema.php" name="frm_create_page">
        <fieldset>
        <legend>
        <?php echo __('Create a page !') . "\n"; ?>
        </legend>
        <?php echo PMA_generate_common_hidden_inputs($db, $table); ?>
        <input type="hidden" name="do" value="createpage" />
        <table>
        <tr>
        <td><label for="id_newpage"><?php echo __('Page name'); ?></label></td>
        <td><input type="text" name="newpage" id="id_newpage" size="20" maxlength="50" /></td>
        </tr>
        <tr>
        <td><?php echo __('Automatic layout based on'); ?></td>
        <td>
        <input type="checkbox" name="auto_layout_internal" id="id_auto_layout_internal" /><label for="id_auto_layout_internal">
        <?php echo __('Internal relations'); ?></label><br />
        <?php
        /*
         * Check to see whether INNODB and PBXT storage engines are Available in MYSQL PACKAGE
         * If available, then provide AutoLayout for Foreign Keys in Schema View
         */ 

        if (PMA_StorageEngine::isValid('InnoDB') || PMA_StorageEngine::isValid('PBXT')) {
            ?>
            <input type="checkbox" name="auto_layout_foreign" id="id_auto_layout_foreign" /><label for="id_auto_layout_foreign">
            <?php echo __('FOREIGN KEY'); ?></label><br />
            <?php
        }
		?>
        </td></tr>
        </table>
        </fieldset>
        <fieldset class="tblFooters">
        <input type="submit" value="<?php echo __('Go'); ?>" />
        </fieldset>
        </form>
        <?php
	}
	
    /**
     * shows/displays the created page names in a drop down list
     * User can select any page number and edit it using dashboard etc
     *
	 * @access public
     */

    public function selectPage()
    {
        global $db,$table,$query_default_option,$cfgRelation,$chpage;
        $page_query = 'SELECT * FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['pdf_pages'])
                . ' WHERE db_name = \'' . PMA_sqlAddslashes($db) . '\'';
        $page_rs    = PMA_query_as_controluser($page_query, FALSE, $query_default_option);
	    if ($page_rs && PMA_DBI_num_rows($page_rs) > 0) {
		    ?>
            <form method="get" action="export_relation_schema.php" name="frm_select_page">
            <fieldset>
            <legend>
            <?php echo __('Please select a page to edit') . "\n"; ?>
            </legend>
            <?php echo PMA_generate_common_hidden_inputs($db, $table); ?>
            <input type="hidden" name="do" value="selectpage" />
            <select name="chpage" onchange="this.form.submit()">
			<option value='0'><?php echo __('Select page'); ?></option>
            <?php
            while ($curr_page = PMA_DBI_fetch_assoc($page_rs)) {
                   echo "\n" . '        '
                        . '<option value="' . $curr_page['page_nr'] . '"';
                    if (isset($chpage) && $chpage == $curr_page['page_nr']) {
                        echo ' selected="selected"';
                    }
                    echo '>' . $curr_page['page_nr'] . ': ' . htmlspecialchars($curr_page['page_descr']) . '</option>';
            } // end while
            echo "\n";
            ?>
            </select>
            <?php
            $choices = array(
                 '0' => __('Edit'),
                 '1' => __('Delete')
		    );
            PMA_display_html_radio('action_choose', $choices, '0', false);
            unset($choices);
            ?>
            </fieldset>
            <fieldset class="tblFooters">
            <input type="submit" value="<?php echo __('Go'); ?>" /><br />
            </fieldset>
            </form>
            <?php
        } // end IF
        echo "\n";
	} // end function

    /** 
     * A dashboard is displayed to AutoLayout the position of tables
     * users can drag n drop the tables and change their positions
     * 
     */	

    public function showTableDashBoard()
    {
        global $db,$cfgRelation,$table,$cfg,$with_field_names,$chpage;
        /*
         * We will need an array of all tables in this db
         */
        $selectboxall = array('--');
        $alltab_rs    = PMA_DBI_query('SHOW TABLES FROM ' . PMA_backquote($db) . ';', null, PMA_DBI_QUERY_STORE);
        while ($val = @PMA_DBI_fetch_row($alltab_rs)) {
               $selectboxall[] = $val[0];
        }

        /*
         * Now if we already have chosen a page number then we should 
         * show the tables involved
         */ 

        if (isset($chpage) && $chpage > 0) {
            echo "\n";
            ?>
		    <h2><?php echo __('Select Tables') ;?></h2>
            <?php
            $page_query = 'SELECT * FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_coords'])
                        . ' WHERE db_name = \'' . PMA_sqlAddslashes($db) . '\''
                        . ' AND pdf_page_number = \'' . PMA_sqlAddslashes($chpage) . '\'';
            $page_rs    = PMA_query_as_controluser($page_query, FALSE, $query_default_option);
            $array_sh_page = array();
            $draginit = '';
            $reset_draginit = '';
            $i = 0;
            while ($temp_sh_page = @PMA_DBI_fetch_assoc($page_rs)) {
                   $array_sh_page[] = $temp_sh_page;
            }

	/*
     * Display WYSIWYG-PDF parts?
     */

	if ($cfg['WYSIWYG-PDF']) {
		if (!isset($_POST['with_field_names']) && !isset($_POST['showwysiwyg'])) {
			$with_field_names = TRUE;
		}
		$this->_displayScratchboardTables($array_sh_page,$draginit,$reset_draginit);
    }
    ?>

    <form method="post" action="export_relation_schema.php" name="edcoord">
        <?php echo PMA_generate_common_hidden_inputs($db, $table); ?>
        <input type="hidden" name="chpage" value="<?php echo htmlspecialchars($chpage); ?>" />
        <input type="hidden" name="do" value="edcoord" />
        <table border="0">
        <tr>
            <th><?php echo __('Table'); ?></th>
            <th><?php echo __('Delete'); ?></th>
            <th>X</th>
            <th>Y</th>
        </tr>
        <?php
        if (isset($ctable)) {
            unset($ctable);
		}

        $i = 0;
        $odd_row = true;
        foreach ($array_sh_page as $dummy_sh_page => $sh_page) {
                $_mtab            =  $sh_page['table_name'];
                $tabExist[$_mtab] =  FALSE;
                echo "\n" . '    <tr class="';
                if ($odd_row) {
                    echo 'odd';
                } else {
                    echo 'even';
                }
                echo '">';
                $odd_row != $odd_row;
                echo "\n" . '        <td>'
                     . "\n" . '            <select name="c_table_' . $i . '[name]">';
                foreach ($selectboxall as $key => $value) {
                        echo "\n" . '                <option value="' . htmlspecialchars($value) . '"';
                        if ($value == $sh_page['table_name']) {
						    echo ' selected="selected"';
						    $tabExist[$_mtab] = TRUE;
					    }
                        echo '>' . htmlspecialchars($value) . '</option>';
                }
                echo "\n" . '            </select>'
                     . "\n" . '        </td>';
                echo "\n" . '        <td>'
                     . "\n" . '            <input type="checkbox" name="c_table_' . $i . '[delete]" value="y" />' . __('Delete');
                echo "\n" . '        </td>';
                echo "\n" . '        <td>'
                     . "\n" . '            <input type="text" ' . ($cfg['WYSIWYG-PDF'] ? 'onchange="dragPlace(' . $i . ', \'x\', this.value)"' : '') . ' name="c_table_' . $i . '[x]" value="' . $sh_page['x'] . '" />';
                echo "\n" . '        </td>';
                echo "\n" . '        <td>'
                     . "\n" . '            <input type="text" ' . ($cfg['WYSIWYG-PDF'] ? 'onchange="dragPlace(' . $i . ', \'y\', this.value)"' : '') . ' name="c_table_' . $i . '[y]" value="' . $sh_page['y'] . '" />';
                echo "\n" . '        </td>';
                echo "\n" . '    </tr>';
                $i++;
            }
            /*
             * Add one more empty row
             */
            echo "\n" . '    <tr class="';
            if ($odd_row) {
                echo 'odd';
            } else {
                echo 'even';
            }
            $odd_row != $odd_row;
            echo '">';
            echo "\n" . '        <td>'
                 . "\n" . '            <select name="c_table_' . $i . '[name]">';
            foreach ($selectboxall as $key => $value) {
                echo "\n" . '                <option value="' . htmlspecialchars($value) . '">' . htmlspecialchars($value) . '</option>';
            }
            echo "\n" . '            </select>'
                 . "\n" . '        </td>';
            echo "\n" . '        <td>'
                 . "\n" . '            <input type="checkbox" name="c_table_' . $i . '[delete]" value="y" />' . __('Delete');
            echo "\n" . '        </td>';
            echo "\n" . '        <td>'
                 . "\n" . '            <input type="text" name="c_table_' . $i . '[x]" value="' . (isset($sh_page['x'])?$sh_page['x']:'') . '" />';
            echo "\n" . '        </td>';
            echo "\n" . '        <td>'
                 . "\n" . '            <input type="text" name="c_table_' . $i . '[y]" value="' . (isset($sh_page['y'])?$sh_page['y']:'') . '" />';
            echo "\n" . '        </td>';
            echo "\n" . '    </tr>';
            echo "\n" . '    </table>' . "\n";

            echo "\n" . '    <input type="hidden" name="c_table_rows" value="' . ($i + 1) . '" />';
            echo ($cfg['WYSIWYG-PDF'] ? "\n" . '    <input type="hidden" id="showwysiwyg" name="showwysiwyg" value="' . ((isset($showwysiwyg) && $showwysiwyg == '1') ? '1' : '0') . '" />' : '');
            echo "\n" . '    <input type="checkbox" name="with_field_names" ' . (isset($with_field_names) ? 'checked="checked"' : ''). ' />' . __('Column names') . '<br />';
            echo "\n" . '    <input type="submit" value="' . __('Save') . '" />';
            echo "\n" . '</form>' . "\n\n";
		} // end if
		
        $this->_deleteTables($chpage);
    }
	
	/** 
	 * show Export relational schema generation options
     * user can select export type of his own choice
     * and the attributes related to it
	 */
	 
    public function displaySchemaGenerationOptions()
    {
        global $cfg,$pmaThemeImage,$db,$test_rs,$chpage;
        ?>
        <form method="post" action="export_relation_schema.php">
            <fieldset>
            <legend>
		    <?php
		    echo PMA_generate_common_hidden_inputs($db);
		    if ($cfg['PropertiesIconic']) {
			    echo '<img class="icon" src="' . $pmaThemeImage . 'b_view.png"'
				.' alt="" width="16" height="16" />';
		    }
		    echo __('Display Relational Schema');
		    ?>:
		    </legend>
            <select name="export_type" id="export_type">
                <option value="pdf" selected="selected"><?php echo __('PDF');?></option>
                <option value="svg"><?php echo __('SVG');?></option>
                <option value="dia"><?php echo __('DIA');?></option>
                <option value="visio"><?php echo __('VISIO');?></option>
                <option value="eps"><?php echo __('EPS');?></option>
            </select>
            <label><?php echo __('Select Export Relational Type');?></label><br />
            <?php
            if (isset($test_rs)) {
            ?>
            <label for="pdf_page_number_opt"><?php echo __('Page number:'); ?></label>
            <select name="pdf_page_number" id="pdf_page_number_opt">
                   <?php
                   while ($pages = @PMA_DBI_fetch_assoc($test_rs)) {
                          echo '                <option value="' . $pages['page_nr'] . '">'
                                . $pages['page_nr'] . ': ' . htmlspecialchars($pages['page_descr']) . '</option>' . "\n";
                    } // end while
                    PMA_DBI_free_result($test_rs);
                    unset($test_rs);
                    ?>
            </select><br />
            <?php } else { ?>
            <input type="hidden" name="pdf_page_number" value="<?php echo htmlspecialchars($chpage); ?>" />
            <?php } ?>
            <input type="hidden" name="do" value="process_export" />
            <input type="checkbox" name="show_grid" id="show_grid_opt" />
            <label for="show_grid_opt"><?php echo __('Show grid'); ?></label><br />
            <input type="checkbox" name="show_color" id="show_color_opt" checked="checked" />
            <label for="show_color_opt"><?php echo __('Show color'); ?></label><br />
            <input type="checkbox" name="show_table_dimension" id="show_table_dim_opt" />
            <label for="show_table_dim_opt"><?php echo __('Show dimension of tables'); ?>
            </label><br />
            <input type="checkbox" name="all_tab_same_wide" id="all_tab_same_wide" />
            <label for="all_tab_same_wide"><?php echo __('Display all tables with the same width'); ?>
            </label><br />
            <input type="checkbox" name="with_doc" id="with_doc" checked="checked" />
            <label for="with_doc"><?php echo __('Data Dictionary'); ?></label><br />
            <input type="checkbox" name="show_keys" id="show_keys" />
            <label for="show_keys"><?php echo __('Only show keys'); ?></label><br />
            <label for="orientation_opt"><?php echo __('Data Dictionary Format'); ?></label>
            <select name="orientation" id="orientation_opt">
                <option value="L"><?php echo __('Landscape');?></option>
                <option value="P"><?php echo __('Portrait');?></option>
            </select>
            <br />

            <label for="paper_opt"><?php echo __('Paper size'); ?></label>
            <select name="paper" id="paper_opt">
                <?php
                foreach ($cfg['PDFPageSizes'] as $key => $val) {
                        echo '<option value="' . $val . '"';
                        if ($val == $cfg['PDFDefaultPageSize']) {
                            echo ' selected="selected"';
                        }
                        echo ' >' . $val . '</option>' . "\n";
                }
                ?>
            </select>
            </fieldset>
            <fieldset class="tblFooters">
            <input type="submit" value="<?php echo __('Go'); ?>" />
            </fieldset>
        </form>
        <?php
    }// end function

	/**
	* Check if there are tables that need to be deleted in dashboard,
	* if there are, ask the user for allowance
	* @param string $chpage selected page
	* @access private
	*/
	private function _deleteTables($chpage)
	{
	global $db, $table,$tabExist;

		$_strtrans  = '';
		$_strname   = '';
		$shoot      = FALSE;
			if (!empty($tabExist) && is_array($tabExist)) {
				foreach ($tabExist as $key => $value) {
					if (!$value) {
						$_strtrans  .= '<input type="hidden" name="delrow[]" value="' . htmlspecialchars($key) . '" />' . "\n";
						$_strname   .= '<li>' . htmlspecialchars($key) . '</li>' . "\n";
						$shoot       = TRUE;
					}
				}
				if ($shoot) {
					echo '<form action="export_relation_schema.php" method="post">' . "\n"
					   . PMA_generate_common_hidden_inputs($db, $table)
					   . '<input type="hidden" name="do" value="deleteCrap" />' . "\n"
					   . '<input type="hidden" name="chpage" value="' . htmlspecialchars($chpage) . '" />' . "\n"
					   . __('The current page has references to tables that no longer exist. Would you like to delete those references?')
					   . '<ul>' . "\n"
					   . $_strname
					   . '</ul>' . "\n"
					   . $_strtrans
					   . '<input type="submit" value="' . __('Go') . '" />' . "\n"
					   . '</form>';
				}
			}
	} // end function

    /**
     * Check if there are tables that need to be deleted in dashboard,
     * if there are, ask the user for allowance
     */

    private function _displayScratchboardTables($array_sh_page,$draginit,$reset_draginit)
    {
        global $with_field_names,$cfg,$db;
        ?>
        <script type="text/javascript" src="./js/dom-drag.js"></script>
        <form method="post" action="export_relation_schema.php" name="dragdrop">
        <input type="button" name="dragdrop" value="<?php echo __('Toggle scratchboard'); ?>" onclick="ToggleDragDrop('pdflayout');" />
        <input type="button" name="dragdropreset" value="<?php echo __('Reset'); ?>" onclick="resetDrag();" />
        </form>
        <div id="pdflayout" class="pdflayout" style="visibility: hidden;">
        <?php
        foreach ($array_sh_page as $key => $temp_sh_page) {
                $drag_x = $temp_sh_page['x'];
                $drag_y = $temp_sh_page['y'];

                $draginit       .= '    Drag.init(getElement("table_' . $i . '"), null, 0, parseInt(myid.style.width)-2, 0, parseInt(myid.style.height)-5);' . "\n";
                $draginit       .= '    getElement("table_' . $i . '").onDrag = function (x, y) { document.edcoord.elements["c_table_' . $i . '[x]"].value = parseInt(x); document.edcoord.elements["c_table_' . $i . '[y]"].value = parseInt(y) }' . "\n";
                $draginit       .= '    getElement("table_' . $i . '").style.left = "' . $drag_x . 'px";' . "\n";
                $draginit       .= '    getElement("table_' . $i . '").style.top  = "' . $drag_y . 'px";' . "\n";
                $reset_draginit .= '    getElement("table_' . $i . '").style.left = "2px";' . "\n";
                $reset_draginit .= '    getElement("table_' . $i . '").style.top  = "' . (15 * $i) . 'px";' . "\n";
                $reset_draginit .= '    document.edcoord.elements["c_table_' . $i . '[x]"].value = "2"' . "\n";
                $reset_draginit .= '    document.edcoord.elements["c_table_' . $i . '[y]"].value = "' . (15 * $i) . '"' . "\n";
	
                $local_query = 'SHOW FIELDS FROM '
                             .  PMA_backquote($temp_sh_page['table_name'])
                             . ' FROM ' . PMA_backquote($db);
                $fields_rs = PMA_DBI_query($local_query);
                unset($local_query);
                $fields_cnt = PMA_DBI_num_rows($fields_rs);
	
                echo '<div id="table_' . $i . '" class="pdflayout_table"><u>' . $temp_sh_page['table_name'] . '</u>';
                if (isset($with_field_names)) {
                    while ($row = PMA_DBI_fetch_assoc($fields_rs)) {
                           echo '<br />' . htmlspecialchars($row['Field']) . "\n";
                    }
                }
                echo '</div>' . "\n";
                PMA_DBI_free_result($fields_rs);
                unset($fields_rs);
                $i++;
        }
        ?>
        </div>
        <script type="text/javascript">
        //<![CDATA[
        function PDFinit() {
            refreshLayout();
            myid = getElement('pdflayout');
            <?php echo $draginit; ?>
        }

        function resetDrag() {
            <?php echo $reset_draginit; ?>
        }
        //]]>
        </script>
        <?php
    }

    /**
     * delete the table rows with table co-ordinates
     *  
     * @access private
     */

    private function _deleteTableRows()
    {
        foreach ($delrow as $current_row) {
                $del_query = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_coords']) . ' ' . "\n"
                         .   ' WHERE db_name = \'' . PMA_sqlAddslashes($db) . '\'' . "\n"
                         .   ' AND   table_name = \'' . PMA_sqlAddslashes($current_row) . '\'' . "\n"
                         .   ' AND   pdf_page_number = \'' . PMA_sqlAddslashes($chpage) . '\'';
                PMA_query_as_controluser($del_query, FALSE, $query_default_option);
        }
    }

    /**
     * get all the export options and verify
     * call and include the appropriate Schema Class depending on $export_type
     *  
     * @access private
     */

    private function _processExportSchema()
	{
        $pdf_page_number        = isset($pdf_page_number) ? $pdf_page_number : 1;
        $show_grid              = (isset($show_grid) && $show_grid == 'on') ? 1 : 0;
        $show_color             = (isset($show_color) && $show_color == 'on') ? 1 : 0;
        $show_table_dimension   = (isset($show_table_dimension) && $show_table_dimension == 'on') ? 1 : 0;
        $all_table_same_wide    = (isset($all_table_same_wide) && $all_table_same_wide == 'on') ? 1 : 0;
        $with_doc               = (isset($with_doc) && $with_doc == 'on') ? 1 : 0;
        $orientation            = (isset($orientation) && $orientation == 'P') ? 'P' : 'L';
        $paper                  = isset($paper) ? $paper : 'A4';
        $show_keys              = (isset($show_keys) && $show_keys == 'on') ? 1 : 0;
        $export_type            = isset($export_type) ? $export_type : 'pdf';  // default is PDF
        PMA_DBI_select_db($db);

        include("./libraries/schema/".ucfirst($export_type)."_Relation_Schema.class.php");
        $obj_schema = eval("new PMA_".ucfirst($export_type)."_Relation_Schema();");
	}
}
?>