160 lines
5.1 KiB
PHP
160 lines
5.1 KiB
PHP
<?php
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/**
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* DOMPDF - PHP5 HTML to PDF renderer
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*
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* File: $RCSfile: page_cache.cls.php,v $
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* Created on: 2004-07-23
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*
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* Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library in the file LICENSE.LGPL; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*
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* Alternatively, you may distribute this software under the terms of the
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* PHP License, version 3.0 or later. A copy of this license should have
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* been distributed with this file in the file LICENSE.PHP . If this is not
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* the case, you can obtain a copy at http://www.php.net/license/3_0.txt.
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*
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* The latest version of DOMPDF might be available at:
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* http://www.digitaljunkies.ca/dompdf
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*
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* @link http://www.digitaljunkies.ca/dompdf
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* @copyright 2004 Benj Carson
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* @author Benj Carson <benjcarson@digitaljunkies.ca>
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* @package dompdf
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* @version 0.5.1
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*/
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/* $Id: page_cache.cls.php,v 1.3 2006/07/07 21:31:04 benjcarson Exp $ */
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/**
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* Caches individual rendered PDF pages
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*
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* Not totally implmented yet. Use at your own risk ;)
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*
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* @access private
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* @package dompdf
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* @static
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*/
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class Page_Cache {
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const DB_USER = "dompdf_page_cache";
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const DB_PASS = "some meaningful password";
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const DB_NAME = "dompdf_page_cache";
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static private $__connection = null;
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function init() {
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if ( is_null(self::$__connection) ) {
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$con_str = "host=" . DB_HOST .
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" dbname=" . self::DB_NAME .
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" user=" . self::DB_USER .
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" password=" . self::DB_PASS;
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if ( !self::$__connection = pg_connect($con_str) )
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throw new Exception("Database connection failed.");
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}
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}
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function __construct() { throw new Exception("Can not create instance of Page_Class. Class is static."); }
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private static function __query($sql) {
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if ( !($res = pg_query(self::$__connection, $sql)) )
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throw new Exception(pg_last_error(self::$__connection));
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return $res;
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}
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static function store_page($id, $page_num, $data) {
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$where = "WHERE id='" . pg_escape_string($id) . "' AND ".
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"page_num=". pg_escape_string($page_num);
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$res = self::__query("SELECT timestamp FROM page_cache ". $where);
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$row = pg_fetch_assoc($res);
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if ( $row )
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self::__query("UPDATE page_cache SET data='" . pg_escape_string($data) . "' " . $where);
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else
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self::__query("INSERT INTO page_cache (id, page_num, data) VALUES ('" . pg_escape_string($id) . "', ".
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pg_escape_string($page_num) . ", ".
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"'". pg_escape_string($data) . "')");
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}
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static function store_fonts($id, $fonts) {
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self::__query("BEGIN");
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// Update the font information
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self::__query("DELETE FROM page_fonts WHERE id='" . pg_escape_string($id) . "'");
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foreach (array_keys($fonts) as $font)
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self::__query("INSERT INTO page_fonts (id, font_name) VALUES ('" .
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pg_escape_string($id) . "', '" . pg_escape_string($font) . "')");
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self::__query("COMMIT");
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}
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// static function retrieve_page($id, $page_num) {
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// $res = self::__query("SELECT data FROM page_cache WHERE id='" . pg_escape_string($id) . "' AND ".
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// "page_num=". pg_escape_string($page_num));
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// $row = pg_fetch_assoc($res);
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// return pg_unescape_bytea($row["data"]);
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// }
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static function get_page_timestamp($id, $page_num) {
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$res = self::__query("SELECT timestamp FROM page_cache WHERE id='" . pg_escape_string($id) . "' AND ".
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"page_num=". pg_escape_string($page_num));
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$row = pg_fetch_assoc($res);
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return $row["timestamp"];
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}
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// Adds the cached document referenced by $id to the provided pdf
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static function insert_cached_document(CPDF_Adapter $pdf, $id, $new_page = true) {
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$res = self::__query("SELECT font_name FROM page_fonts WHERE id='" . pg_escape_string($id) . "'");
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// Ensure that the fonts needed by the cached document are loaded into
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// the pdf
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while ($row = pg_fetch_assoc($res))
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$pdf->get_cpdf()->selectFont($row["font_name"]);
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$res = self::__query("SELECT data FROM page_cache WHERE id='" . pg_escape_string($id) . "'");
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if ( $new_page )
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$pdf->new_page();
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$first = true;
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while ($row = pg_fetch_assoc($res)) {
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if ( !$first )
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$pdf->new_page();
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else
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$first = false;
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$page = $pdf->reopen_serialized_object($row["data"]);
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//$pdf->close_object();
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$pdf->add_object($page, "add");
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}
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}
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}
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Page_Cache::init();
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?>
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