<?php
/**
* @package dompdf
* @link http://dompdf.github.com/
* @author Benj Carson <[email protected]>
* @author Helmut Tischer <[email protected]>
* @author Fabien Ménager <[email protected]>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
namespace Dompdf;
use FontLib\Font;
/**
* 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 FontMetrics
{
/**
* Name of the font cache file
*
* This file must be writable by the webserver process only to update it
* with save_font_families() after adding the .afm file references of a new font family
* with FontMetrics::saveFontFamilies().
* This is typically done only from command line with load_font.php on converting
* ttf fonts to ufm with php-font-lib.
*/
const CACHE_FILE = "dompdf_font_family_cache.php";
/**
* @var Canvas
* @deprecated
*/
protected $pdf;
/**
* Underlying {@link Canvas} object to perform text size calculations
*
* @var Canvas
*/
protected $canvas;
/**
* Array of font family names to font files
*
* Usually cached by the {@link load_font.php} script
*
* @var array
*/
protected $fontLookup = [];
/**
* @var Options
*/
private $options;
/**
* Class initialization
*/
public function __construct(Canvas $canvas, Options $options)
{
$this->setCanvas($canvas);
$this->setOptions($options);
$this->loadFontFamilies();
}
/**
* @deprecated
*/
public function save_font_families()
{
$this->saveFontFamilies();
}
/**
* Saves the stored font family cache
*
* The name and location of the cache file are determined by {@link
* FontMetrics::CACHE_FILE}. This file should be writable by the
* webserver process.
*
* @see FontMetrics::loadFontFamilies()
*/
public function saveFontFamilies()
{
// replace the path to the DOMPDF font directories with the corresponding constants (allows for more portability)
$cacheData = sprintf("<?php return array (%s", PHP_EOL);
foreach ($this->fontLookup as $family => $variants) {
$cacheData .= sprintf(" '%s' => array(%s", addslashes($family), PHP_EOL);
foreach ($variants as $variant => $path) {
$path = sprintf("'%s'", $path);
$path = str_replace('\'' . $this->getOptions()->getFontDir() , '$fontDir . \'' , $path);
$path = str_replace('\'' . $this->getOptions()->getRootDir() , '$rootDir . \'' , $path);
$cacheData .= sprintf(" '%s' => %s,%s", $variant, $path, PHP_EOL);
}
$cacheData .= sprintf(" ),%s", PHP_EOL);
}
$cacheData .= ") ?>";
file_put_contents($this->getCacheFile(), $cacheData);
}
/**
* @deprecated
*/
public function load_font_families()
{
$this->loadFontFamilies();
}
/**
* Loads the stored font family cache
*
* @see FontMetrics::saveFontFamilies()
*/
public function loadFontFamilies()
{
$fontDir = $this->getOptions()->getFontDir();
$rootDir = $this->getOptions()->getRootDir();
// FIXME: temporarily define constants for cache files <= v0.6.2
if (!defined("DOMPDF_DIR")) { define("DOMPDF_DIR", $rootDir); }
if (!defined("DOMPDF_FONT_DIR")) { define("DOMPDF_FONT_DIR", $fontDir); }
$file = $rootDir . "/lib/fonts/dompdf_font_family_cache.dist.php";
$distFonts = require $file;
if (!is_readable($this->getCacheFile())) {
$this->fontLookup = $distFonts;
return;
}
$cacheData = require $this->getCacheFile();
$this->fontLookup = [];
if (is_array($this->fontLookup)) {
foreach ($cacheData as $key => $value) {
$this->fontLookup[stripslashes($key)] = $value;
}
}
// Merge provided fonts
$this->fontLookup += $distFonts;
}
/**
* @param array $style
* @param string $remote_file
* @param resource $context
* @return bool
* @deprecated
*/
public function register_font($style, $remote_file, $context = null)
{
return $this->registerFont($style, $remote_file);
}
/**
* @param array $style
* @param string $remoteFile
* @param resource $context
* @return bool
*/
public function registerFont($style, $remoteFile, $context = null)
{
$fontname = mb_strtolower($style["family"]);
$families = $this->getFontFamilies();
$entry = [];
if (isset($families[$fontname])) {
$entry = $families[$fontname];
}
$styleString = $this->getType("{$style['weight']} {$style['style']}");
$fontDir = $this->getOptions()->getFontDir();
$remoteHash = md5($remoteFile);
$prefix = $fontname . "_" . $styleString;
$prefix = preg_replace("/[^\\pL\d]+/u", "-", $prefix);
$prefix = trim($prefix, "-");
if (function_exists('iconv')) {
$prefix = iconv('utf-8', 'us-ascii//TRANSLIT', $prefix);
}
$prefix = preg_replace("/[^-\w]+/", "", $prefix);
$localFile = $fontDir . "/" . $prefix . "_" . $remoteHash;
if (isset($entry[$styleString]) && $localFile == $entry[$styleString]) {
return true;
}
$cacheEntry = $localFile;
$localFile .= ".".strtolower(pathinfo(parse_url($remoteFile, PHP_URL_PATH), PATHINFO_EXTENSION));
$entry[$styleString] = $cacheEntry;
// Download the remote file
[$protocol, $baseHost, $basePath] = Helpers::explode_url($remoteFile);
if (!$this->options->isRemoteEnabled() && ($protocol != "" && $protocol !== "file://")) {
Helpers::record_warnings(E_USER_WARNING, "Remote font resource $remoteFile referenced, but remote file download is disabled.", __FILE__, __LINE__);
return false;
}
if ($protocol == "" || $protocol === "file://") {
$realfile = realpath($remoteFile);
$rootDir = realpath($this->options->getRootDir());
if (strpos($realfile, $rootDir) !== 0) {
$chroot = realpath($this->options->getChroot());
if (!$chroot || strpos($realfile, $chroot) !== 0) {
Helpers::record_warnings(E_USER_WARNING, "Permission denied on $remoteFile. The file could not be found under the directory specified by Options::chroot.", __FILE__, __LINE__);
return false;
}
}
if (!$realfile) {
Helpers::record_warnings(E_USER_WARNING, "File '$realfile' not found.", __FILE__, __LINE__);
return false;
}
$remoteFile = $realfile;
}
list($remoteFileContent, $http_response_header) = @Helpers::getFileContent($remoteFile, $context);
if (empty($remoteFileContent)) {
return false;
}
$localTempFile = @tempnam($this->options->get("tempDir"), "dompdf-font-");
file_put_contents($localTempFile, $remoteFileContent);
$font = Font::load($localTempFile);
if (!$font) {
unlink($localTempFile);
return false;
}
$font->parse();
$font->saveAdobeFontMetrics("$cacheEntry.ufm");
$font->close();
unlink($localTempFile);
if ( !file_exists("$cacheEntry.ufm") ) {
return false;
}
// Save the changes
file_put_contents($localFile, $remoteFileContent);
if ( !file_exists($localFile) ) {
unlink("$cacheEntry.ufm");
return false;
}
$this->setFontFamily($fontname, $entry);
$this->saveFontFamilies();
return true;
}
/**
* @param $text
* @param $font
* @param $size
* @param float $word_spacing
* @param float $char_spacing
* @return float
* @deprecated
*/
public function get_text_width($text, $font, $size, $word_spacing = 0.0, $char_spacing = 0.0)
{
//return self::$_pdf->get_text_width($text, $font, $size, $word_spacing, $char_spacing);
return $this->getTextWidth($text, $font, $size, $word_spacing, $char_spacing);
}
/**
* 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 $wordSpacing
* @param float $charSpacing
*
* @internal param float $spacing word spacing, if any
* @return float
*/
public function getTextWidth($text, $font, $size, $wordSpacing = 0.0, $charSpacing = 0.0)
{
// @todo Make sure this cache is efficient before enabling it
static $cache = [];
if ($text === "") {
return 0;
}
// Don't cache long strings
$useCache = !isset($text[50]); // Faster than strlen
$key = "$font/$size/$wordSpacing/$charSpacing";
if ($useCache && isset($cache[$key][$text])) {
return $cache[$key]["$text"];
}
$width = $this->getCanvas()->get_text_width($text, $font, $size, $wordSpacing, $charSpacing);
if ($useCache) {
$cache[$key][$text] = $width;
}
return $width;
}
/**
* @param $font
* @param $size
* @return float
* @deprecated
*/
public function get_font_height($font, $size)
{
return $this->getFontHeight($font, $size);
}
/**
* Calculates font height
*
* @param string $font
* @param float $size
*
* @return float
*/
public function getFontHeight($font, $size)
{
return $this->getCanvas()->get_font_height($font, $size);
}
/**
* @param $family_raw
* @param string $subtype_raw
* @return string
* @deprecated
*/
public function get_font($family_raw, $subtype_raw = "normal")
{
return $this->getFont($family_raw, $subtype_raw);
}
/**
* 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 Options::defaultFont}) is used. The font file returned
* is the absolute pathname to the font file on the system.
*
* @param string $familyRaw
* @param string $subtypeRaw
*
* @return string
*/
public function getFont($familyRaw, $subtypeRaw = "normal")
{
static $cache = [];
if (isset($cache[$familyRaw][$subtypeRaw])) {
return $cache[$familyRaw][$subtypeRaw];
}
/* Allow calling for various fonts in search path. Therefore not immediately
* return replacement on non match.
* Only when called with NULL try replacement.
* When this is also missing there is really trouble.
* If only the subtype fails, nevertheless return failure.
* Only on checking the fallback font, check various subtypes on same font.
*/
$subtype = strtolower($subtypeRaw);
if ($familyRaw) {
$family = str_replace(["'", '"'], "", strtolower($familyRaw));
if (isset($this->fontLookup[$family][$subtype])) {
return $cache[$familyRaw][$subtypeRaw] = $this->fontLookup[$family][$subtype];
}
return null;
}
$family = "serif";
if (isset($this->fontLookup[$family][$subtype])) {
return $cache[$familyRaw][$subtypeRaw] = $this->fontLookup[$family][$subtype];
}
if (!isset($this->fontLookup[$family])) {
return null;
}
$family = $this->fontLookup[$family];
foreach ($family as $sub => $font) {
if (strpos($subtype, $sub) !== false) {
return $cache[$familyRaw][$subtypeRaw] = $font;
}
}
if ($subtype !== "normal") {
foreach ($family as $sub => $font) {
if ($sub !== "normal") {
return $cache[$familyRaw][$subtypeRaw] = $font;
}
}
}
$subtype = "normal";
if (isset($family[$subtype])) {
return $cache[$familyRaw][$subtypeRaw] = $family[$subtype];
}
return null;
}
/**
* @param $family
* @return null|string
* @deprecated
*/
public function get_family($family)
{
return $this->getFamily($family);
}
/**
* @param string $family
* @return null|string
*/
public function getFamily($family)
{
$family = str_replace(["'", '"'], "", mb_strtolower($family));
if (isset($this->fontLookup[$family])) {
return $this->fontLookup[$family];
}
return null;
}
/**
* @param $type
* @return string
* @deprecated
*/
public function get_type($type)
{
return $this->getType($type);
}
/**
* @param string $type
* @return string
*/
public function getType($type)
{
if (preg_match('/bold/i', $type)) {
$weight = 700;
} elseif (preg_match('/([1-9]00)/', $type, $match)) {
$weight = (int)$match[0];
} else {
$weight = 400;
}
$weight = $weight === 400 ? 'normal' : $weight;
$weight = $weight === 700 ? 'bold' : $weight;
$style = preg_match('/italic|oblique/i', $type) ? 'italic' : null;
if ($weight === 'normal' && $style !== null) {
return $style;
}
return $style === null
? $weight
: $weight.'_'.$style;
}
/**
* @return array
* @deprecated
*/
public function get_font_families()
{
return $this->getFontFamilies();
}
/**
* Returns the current font lookup table
*
* @return array
*/
public function getFontFamilies()
{
return $this->fontLookup;
}
/**
* @param string $fontname
* @param mixed $entry
* @deprecated
*/
public function set_font_family($fontname, $entry)
{
$this->setFontFamily($fontname, $entry);
}
/**
* @param string $fontname
* @param mixed $entry
*/
public function setFontFamily($fontname, $entry)
{
$this->fontLookup[mb_strtolower($fontname)] = $entry;
}
/**
* @return string
*/
public function getCacheFile()
{
return $this->getOptions()->getFontDir() . '/' . self::CACHE_FILE;
}
/**
* @param Options $options
* @return $this
*/
public function setOptions(Options $options)
{
$this->options = $options;
return $this;
}
/**
* @return Options
*/
public function getOptions()
{
return $this->options;
}
/**
* @param Canvas $canvas
* @return $this
*/
public function setCanvas(Canvas $canvas)
{
$this->canvas = $canvas;
// Still write deprecated pdf for now. It might be used by a parent class.
$this->pdf = $canvas;
return $this;
}
/**
* @return Canvas
*/
public function getCanvas()
{
return $this->canvas;
}
}
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