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xz5��blob 13679�<?php /** * DOMPDF - PHP5 HTML to PDF renderer * * File: $RCSfile: dompdf.cls.php,v $ * Created on: 2004-06-09 * * Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library in the file LICENSE.LGPL; if not, write to the * Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA * 02111-1307 USA * * Alternatively, you may distribute this software under the terms of the * PHP License, version 3.0 or later. A copy of this license should have * been distributed with this file in the file LICENSE.PHP . If this is not * the case, you can obtain a copy at http://www.php.net/license/3_0.txt. * * The latest version of DOMPDF might be available at: * http://www.digitaljunkies.ca/dompdf * * @link http://www.digitaljunkies.ca/dompdf * @copyright 2004 Benj Carson * @author Benj Carson <benjcarson@digitaljunkies.ca> * @package dompdf * @version 0.5.1 / / $Id: dompdf.cls.php,v 1.18 2006/07/07 21:31:03 benjcarson Exp $ / /* * DOMPDF - PHP5 HTML to PDF renderer * * DOMPDF loads HTML and does its best to render it as a PDF. It gets its * name from the new DomDocument PHP5 extension. Source HTML is first * parsed by a DomDocument object. DOMPDF takes the resulting DOM tree and * attaches a {@link Frame} object to each node. {@link Frame} objects store * positioning and layout information and each has a reference to a {@link * Style} object. * * Style information is loaded and parsed (see {@link Stylesheet}) and is * applied to the frames in the tree by using XPath. CSS selectors are * converted into XPath queries, and the computed {@link Style} objects are * applied to the {@link Frame}s. * * {@link Frame}s are then decorated (in the design pattern sense of the * word) based on their CSS display property ({@link * http://www.w3.org/TR/CSS21/visuren.html#propdef-display}). * Frame_Decorators augment the basic {@link Frame} class by adding * additional properties and methods specific to the particular type of * {@link Frame}. For example, in the CSS layout model, block frames * (display: block;) contain line boxes that are usually filled with text or * other inline frames. The Block_Frame_Decorator therefore adds a $lines * property as well as methods to add {@link Frame}s to lines and to add * additional lines. {@link Frame}s also are attached to specific * Positioner and {@link Frame_Reflower} objects that contain the * positioining and layout algorithm for a specific type of frame, * respectively. This is an application of the Strategy pattern. * * Layout, or reflow, proceeds recursively (post-order) starting at the root * of the document. Space constraints (containing block width & height) are * pushed down, and resolved positions and sizes bubble up. Thus, every * {@link Frame} in the document tree is traversed once (except for tables * which use a two-pass layout algorithm). If you are interested in the * details, see the reflow() method of the Reflower classes. * * Rendering is relatively straightforward once layout is complete. {@link * Frame}s are rendered using an adapted {@link Cpdf} class, originally * written by Wayne Munro, http://www.ros.co.nz/pdf/. (Some performance * related changes have been made to the original {@link Cpdf} class, and * the {@link CPDF_Adapter} class provides a simple, stateless interface to * PDF generation.) PDFLib support has now also been added, via the {@link * PDFLib_Adapter}. * * * @package dompdf / class DOMPDF { /* * DomDocument representing the HTML document * * @var DomDocument / protected $_xml; /* * Frame_Tree derived from the DOM tree * * @var Frame_Tree / protected $_tree; /* * Stylesheet for the document * * @var Stylesheet / protected $_css; /* * Actual PDF renderer * * @var Canvas / protected $_pdf; /* * Desired paper size ('letter', 'legal', 'A4', etc.) * * @var string / protected $_paper_size; /* * Paper orientation ('portrait' or 'landscape') * * @var string / protected $_paper_orientation; private $_cache_id; /* * Base hostname * * Used for relative paths/urls * @var string / protected $_base_host; /* * Absolute base path * * Used for relative paths/urls * @var string / protected $_base_path; /* * Protcol used to request file (file://, http://, etc) * * @var string / protected $_protocol; /* * Class constructor / function __construct() { $this->_messages = array(); $this->_xml = new DomDocument(); $this->_xml->preserveWhiteSpace = true; $this->_tree = new Frame_Tree($this->_xml); $this->_css = new Stylesheet(); $this->_pdf = null; $this->_paper_size = "letter"; $this->_paper_orientation = "portrait"; $this->_base_host = ""; $this->_base_path = ""; $this->_cache_id = null; } /* * Returns the underlying {@link Frame_Tree} object * * @return Frame_Tree / function get_tree() { return $this->_tree; } //........................................................................ /* * Sets the protocol to use * * @param string $proto / // FIXME: validate these function set_protocol($proto) { $this->_protocol = $proto; } /* * Sets the base hostname * * @param string $host / function set_host($host) { $this->_base_host = $host; } /* * Sets the base path * * @param string $path / function set_base_path($path) { $this->_base_path = $path; } /* * Returns the protocol in use * * @return string / function get_protocol() { return $this->_protocol; } /* * Returns the base hostname * * @return string / function get_host() { return $this->_base_host; } /* * Returns the base path * * @return string / function get_base_path() { return $this->_base_path; } /* * Return the underlying Canvas instance (e.g. CPDF_Adapter, GD_Adapter) * * @return Canvas / function get_canvas() { return $this->_pdf; } //........................................................................ /* * Loads an HTML file * * Parse errors are stored in the global array _dompdf_warnings. * * @param string $file a filename or url to load / function load_html_file($file) { // Store parsing warnings as messages (this is to prevent output to the // browser if the html is ugly and the dom extension complains, // preventing the pdf from being streamed.) list($this->_protocol, $this->_base_host, $this->_base_path) = explode_url($file); if ( !DOMPDF_ENABLE_REMOTE && ($this->_protocol != "" && $this->_protocol != "file://" ) ) throw new DOMPDF_Exception("Remote file requested, but DOMPDF_ENABLE_REMOTE is false."); if ( !DOMPDF_ENABLE_PHP ) { set_error_handler("record_warnings"); $this->_xml->loadHTMLFile($file); restore_error_handler(); } else $this->load_html(file_get_contents($file)); } /* * Loads an HTML string * * Parse errors are stored in the global array _dompdf_warnings. * * @param string $str HTML text to load / function load_html($str) { // Parse embedded php, first-pass if ( DOMPDF_ENABLE_PHP ) { ob_start(); eval("?" . ">$str"); $str = ob_get_contents(); ob_end_clean(); } // Store parsing warnings as messages set_error_handler("record_warnings"); $this->_xml->loadHTML($str); restore_error_handler(); } /* * Builds the {@link Frame_Tree}, loads any CSS and applies the styles to * the {@link Frame_Tree} / protected function _process_html() { $this->_tree->build_tree(); $this->_css->load_css_file(Stylesheet::DEFAULT_STYLESHEET); // load <link rel="STYLESHEET" ... /> tags $links = $this->_xml->getElementsByTagName("link"); foreach ($links as $link) { if ( mb_strtolower($link->getAttribute("rel")) == "stylesheet" \|\| mb_strtolower($link->getAttribute("type")) == "text/css" ) { $url = $link->getAttribute("href"); $url = build_url($this->_protocol, $this->_base_host, $this->_base_path, $url); $this->_css->load_css_file($url); } } // load <style> tags $styles = $this->_xml->getElementsByTagName("style"); foreach ($styles as $style) { // Accept all <style> tags by default (note this is contrary to W3C // HTML 4.0 spec: // http://www.w3.org/TR/REC-html40/present/styles.html#adef-media // which states that the default media type is 'screen' if ( $style->hasAttributes() && ($media = $style->getAttribute("media")) && !in_array($media, Stylesheet::$ACCEPTED_MEDIA_TYPES) ) continue; $css = ""; if ( $style->hasChildNodes() ) { $child = $style->firstChild; while ( $child ) { $css .= $child->nodeValue; // Handle <style><!-- blah --></style> $child = $child->nextSibling; } } else $css = $style->nodeValue; // Set the base path of the Stylesheet to that of the file being processed $this->_css->set_protocol($this->_protocol); $this->_css->set_host($this->_base_host); $this->_css->set_base_path($this->_base_path); $this->_css->load_css($css); } } //........................................................................ /* * Sets the paper size & orientation * * @param string $size 'letter', 'legal', 'A4', etc. {@link CPDF_Adapter::$PAPER_SIZES} * @param string $orientation 'portrait' or 'landscape' / function set_paper($size, $orientation = "portrait") { $this->_paper_size = $size; $this->_paper_orientation = $orientation; } //........................................................................ /* * Enable experimental caching capability * @access private / function enable_caching($cache_id) { $this->_cache_id = $cache_id; } //........................................................................ /* * Renders the HTML to PDF / function render() { //enable_mem_profile(); $this->_process_html(); $this->_css->apply_styles($this->_tree); $root = null; foreach ($this->_tree->get_frames() as $frame) { // Set up the root frame if ( is_null($root) ) { $root = Frame_Factory::decorate_root( $this->_tree->get_root(), $this ); continue; } // Create the appropriate decorators, reflowers & positioners. $deco = Frame_Factory::decorate_frame($frame, $this); $deco->set_root($root); // FIXME: handle generated content if ( $frame->get_style()->display == "list-item" ) { // Insert a list-bullet frame $node = $this->_xml->createElement("bullet"); // arbitrary choice $b_f = new Frame($node); $style = $this->_css->create_style(); $style->display = "-dompdf-list-bullet"; $style->inherit($frame->get_style()); $b_f->set_style($style); $deco->prepend_child( Frame_Factory::decorate_frame($b_f, $this) ); } } $this->_pdf = Canvas_Factory::get_instance($this->_paper_size, $this->_paper_orientation); $root->set_containing_block(0, 0, $this->_pdf->get_width(), $this->_pdf->get_height()); $root->set_renderer(new Renderer($this)); // This is where the magic happens: $root->reflow(); // Clean up cached images Image_Cache::clear(); } //........................................................................ /* * Streams the PDF to the client * * The file will open a download dialog by default. The options * parameter controls the output headers. Accepted headers are: * * 'Accept-Ranges' => 1 or 0 - if this is not set to 1, then this * header is not included, off by default this header seems to * have caused some problems despite tha fact that it is supposed * to solve them, so I am leaving it off by default. * * 'compress' = > 1 or 0 - apply content stream compression, this is * on (1) by default * * 'Attachment' => 1 or 0 - if 1, force the browser to open a * download dialog, on (1) by default * * @param string $filename the name of the streamed file * @param array $options header options (see above) / function stream($filename, $options = null) { if (!is_null($this->_pdf)) $this->_pdf->stream($filename, $options); } /* * Returns the PDF as a string * * @return string */ function output() { global $_dompdf_debug; if ( is_null($this->_pdf) ) return null; return $this->_pdf->output( $_dompdf_debug ); } //........................................................................ } ?>�^i