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drbenway
Smarty n00b
Joined: 11 Jul 2010
Posts: 2
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 Posted: Sun Jul 11, 2010 10:51 am Post subject: Suggested small change to the smarty core |
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I've been working on some translation tools. One problem we had was that we had many templates that were not actually being used. To remedy this problem I wrote a prefilter that, while a page is being loaded, grabs all the translatable text from a template and saves it along with a modified version of the template. But in order for this to work I needed to know the name of the template. I made a modified version of Smarty.class.php which adds this information as two class members: resource_name and (if the resource is a file) resource_file.
I implemented this in an older version of smarty: 2.6.25.
Last edited by drbenway on Sun Jul 11, 2010 10:57 am; edited 2 times in total |
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drbenway
Smarty n00b
Joined: 11 Jul 2010
Posts: 2
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| Posted: Sun Jul 11, 2010 10:55 am Post subject: Example usage: prefilter.extract.php |
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This prefilter extracts translatable text from a template and creates two files: a frame with text replaced by placeholders and a texts file with the removed texts.
Look for the reference to $smarty->resource_file towards the bottom
| Code: |
cat prefilter.extract.php
<?php
/**
* extract texts from a template and save to a file ending .texts
* replace with an array reference and save the modified
* smarty to another file ending .frame
*/
function smarty_prefilter_extract($source,&$smarty) {
Texts::reset($smarty->resource_name);
$filtered = $source;
$filtered = preg_replace_callback(
'#(<?notrans>.*?</notrans)|((?:<?[^>]*>|^)\s*)([^<]+?)(\s*(?:</script|<|$))#is',
'__html_extract',
$filtered
);
$filtered = preg_replace_callback(
'#((?:title|alt)\s*=\s*")([^"]*)#is',
'__alt_extract',
$filtered
);
$filtered = preg_replace('#({\s*)include#is', "$1".'showframe', $filtered);
__save_filtered($filtered, $smarty);
return $source;
}
class Texts {
public static $res = '';
public static $strings = array();
public static $count = -1;
public static $index = 0;
public static $seen = array();
public static function reset($resource_name) {
self::$strings = array();
self::$seen = array();
self::$count = -1;
self::$index = 0;
self::$res = preg_replace(
'#\W+#',
"_",
$resource_name
);
}
public static function addString($string) {
if (!isset(self::$seen[$string])) {
self::$strings[++self::$count] = $string;
self::$index = self::$count;
self::$seen[$string] = self::$index;
} else {
self::$index = self::$seen[$string];
}
}
}
function __html_extract($matches) {
# ignore some areas deliberately
if (preg_match('#^notrans>#i',$matches[1])) return $matches[0];
# ignore javascript blocks
if (preg_match('#script#i',$matches[4])) return $matches[0];
$strings = __strip_strings($matches[3]);
$replaced = implode('',$strings);
return $matches[2].$replaced.$matches[4];
}
function __alt_extract($matches) {
$strings = __strip_strings($matches[2]);
$replaced = implode('',$strings);
return $matches[1].$replaced;
}
function __strip_strings($match) {
$i = 0;
$strings = array();
// separate out {} tags from text
foreach (str_split($match) as $c) {
if ($c == '{') {
if (count($strings)) $i++;
$strings[$i] .= $c;
} else if ($c == '}') {
$strings[$i] .= $c;
$i++;
} else $strings[$i] .= $c;
}
for ($i = 0; $i < count($strings); $i++) {
if (
preg_match('#(?:^|\s)\w|\w(?:\s|$)#',$strings[$i])
and !preg_match('#{#',$strings[$i])
and !preg_match('#{php}#',$strings[$i-1])
) {
# trim the whitespace but preserve it in the template
preg_match('#^(\s*)(.*?)(\s*)$#s',$strings[$i],$m);
Texts::addString($m[2]);
$strings[$i] = $m[1].'{$texts.'.Texts::$res.'['.Texts::$index.']}'.$m[3];
}
}
return $strings;
}
function __save_filtered($filtered, &$smarty) {
global $textfiles;
umask(octdec('0000'));
$path = $smarty->resource_file;
$path = preg_replace('#/templates/#','/frames/',$path);
$dir = dirname($path);
# if not check for the directory
if (!is_dir($dir)) {
if (!mkdir($dir)) die("can't make $path");
}
# always save the frame
file_put_contents(
"$path.frame",
$filtered
);
# generate a string representation of the array
$newtexts = var_export(Texts::$strings,true);
# put a key in the statement so we can amalgamate
# translations when we have more than one template
$r = Texts::$res;
$newtextscode = "<?php\n\$texts['$r'] = $newtexts;\n";
$savetexts = true;
# see if we've already processed this page before
$tfile = "$path.texts";
$textfiles[$tfile]++;
if (is_file($tfile)) {
$oldtextscode = file_get_contents($tfile);
if ($oldtextscode == $newtextscode)
$savetexts = false;
}
# save the texts only if they have changed
if ($savetexts) {
file_put_contents( $tfile, $newtextscode );
}
}
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