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<?php
/**
* DOMPDF - PHP5 HTML to PDF renderer
*
* File: $RCSfile: font_metrics.cls.php,v $
* Created on: 2004-06-02
*
* 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: font_metrics.cls.php,v 1.6 2006/07/07 21:31:03 benjcarson Exp $ */
require_once(DOMPDF_LIB_DIR . "/class.pdf.php");
/**
* Name of the font cache file
*
* This file must be writable by the webserver process. Declared here
* because PHP5 prevents constants from being declared with expressions
*/
define('__DOMPDF_FONT_CACHE_FILE', DOMPDF_FONT_DIR . "dompdf_font_family_cache");
/**
* The font metrics class
*
* This class provides information about fonts and text. It can resolve
* font names into actual installed font files, as well as determine the
* size of text in a particular font and size.
*
* @static
* @package dompdf
*/
class Font_Metrics {
/**
* @see __DOMPDF_FONT_CACHE_FILE
*/
const CACHE_FILE = __DOMPDF_FONT_CACHE_FILE;
/**
* Underlying {@link Cpdf} object to perform text size calculations
*
* @var Cpdf
*/
static protected $_pdf = null;
/**
* Array of font family names to font files
*
* Usually cached by the {@link load_font.php} script
*
* @var array
*/
static protected $_font_lookup = array();
/**
* Class initialization
*
*/
static function init() {
if (!self::$_pdf) {
self::load_font_families();
self::$_pdf = Canvas_Factory::get_instance();
}
}
/**
* Calculates text size, in points
*
* @param string $text the text to be sized
* @param string $font the desired font
* @param float $size the desired font size
* @param float $spacing word spacing, if any
* @return float
*/
static function get_text_width($text, $font, $size, $spacing = 0) {
return self::$_pdf->get_text_width($text, $font, $size, $spacing);
}
/**
* Calculates font height
*
* @param string $font
* @param float $size
* @return float
*/
static function get_font_height($font, $size) {
return self::$_pdf->get_font_height($font, $size);
}
/**
* Resolves a font family & subtype into an actual font file
*
* Subtype can be one of 'normal', 'bold', 'italic' or 'bold_italic'. If
* the particular font family has no suitable font file, the default font
* ({@link DOMPDF_DEFAULT_FONT}) is used. The font file returned
* is the absolute pathname to the font file on the system.
*
* @param string $family
* @param string $subtype
* @return string
*/
static function get_font($family, $subtype = "normal") {
$family = str_replace( array("'", '"'), "", mb_strtolower($family));
$subtype = mb_strtolower($subtype);
if ( !isset(self::$_font_lookup[$family]) )
$family = DOMPDF_DEFAULT_FONT;
if ( !in_array($subtype, array("normal", "bold", "italic", "bold_italic")) )
//throw new DOMPDF_Exception("Font subtype '$subtype' is unsupported.");
return self::$_font_lookup[DOMPDF_DEFAULT_FONT]["normal"];
if ( !isset(self::$_font_lookup[$family][$subtype]) )
return null;
return self::$_font_lookup[$family][$subtype];
}
/**
* Saves the stored font family cache
*
* The name and location of the cache file are determined by {@link
* Font_Metrics::CACHE_FILE}. This file should be writable by the
* webserver process.
*
* @see Font_Metrics::load_font_families()
*/
static function save_font_families() {
file_put_contents(self::CACHE_FILE, var_export(self::$_font_lookup, true));
}
/**
* Loads the stored font family cache
*
* @see save_font_families()
*/
static function load_font_families() {
if ( !is_readable(self::CACHE_FILE) )
return;
$data = file_get_contents(self::CACHE_FILE);
if ( $data != "" )
eval ('self::$_font_lookup = ' . $data . ";");
}
/**
* Returns the current font lookup table
*
* @return array
*/
static function get_font_families() {
return self::$_font_lookup;
}
static function set_font_family($fontname, $entry) {
self::$_font_lookup[mb_strtolower($fontname)] = $entry;
}
}
Font_Metrics::init();
?>
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