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- Fix search excerpt highlighter marking substrings of words too + small improvements

4.6.x
Steven Wittens 2005-01-10 23:37:26 +00:00
parent 3f34a78d18
commit 59a2c464c7
2 changed files with 40 additions and 34 deletions
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33
modules/search.module
View File

@ -607,18 +607,20 @@ function search_data($keys = NULL, $type = 'node') {
function search_excerpt($keys, $text) {
$keys = search_keywords_split($keys);
$text = strip_tags(str_replace(array('<', '>'), array(' <', '> '), $text));
array_walk($keys, '_search_excerpt_replace');
$workkeys = $keys;
// Extract a fragment per keyword for at most 4 keywords.
// First we collect ranges of text around each keyword, starting/ending
// at spaces.
// If the fragment is too short, we look for second occurences.
// If the sum of all fragments is too short, we look for second occurences.
$ranges = array();
$included = array();
$length = 0;
while ($length < 256) {
foreach ($keys as $k => $key) {
while ($length < 256 && count($workkeys)) {
foreach ($workkeys as $k => $key) {
if (strlen($key) == 0) {
unset($keys[$k]);
unset($workkeys[$k]);
continue;
}
if ($length >= 256) {
@ -629,8 +631,10 @@ function search_excerpt($keys, $text) {
if (!isset($included[$key])) {
$included[$key] = 0;
}
// Note: workaround for lack of stripos() in PHP4
if (($p = strpos($text, stristr(substr($text, $included[$key]), $key), $included[$key])) !== false) {
// Locate a keyword (position $p), then locate a space in front (position
// $q) and behind it (position $s)
if (preg_match('/\b'. $key .'\b/iu', $text, $match, PREG_OFFSET_CAPTURE, $included[$key])) {
$p = $match[0][1];
if (($q = strpos($text, ' ', max(0, $p - 60))) !== false) {
$end = substr($text, $p, 80);
if (($s = strrpos($end, ' ')) !== false) {
@ -639,23 +643,23 @@ function search_excerpt($keys, $text) {
$included[$key] = $p + 1;
}
else {
unset($keys[$k]);
unset($workkeys[$k]);
}
}
else {
unset($keys[$k]);
unset($workkeys[$k]);
}
}
else {
unset($keys[$k]);
unset($workkeys[$k]);
}
}
}
// If we didn't find anything, return the beginning.
if (count($ranges) == 0 || count($keys) == 0) {
if (count($ranges) == 0) {
return truncate_utf8($text, 256) . ' ...';
}
}
// Sort the text ranges by starting position.
ksort($ranges);
@ -684,11 +688,10 @@ function search_excerpt($keys, $text) {
foreach ($newranges as $from => $to) {
$out[] = substr($text, $from, $to - $from);
}
$text = '... '. implode(' ... ', $out) .' ...';
$text = (isset($newranges[0]) ? '' : '... '). implode(' ... ', $out) .' ...';
// Highlight keywords. Must be done at once to prevent conflicts ('strong' and '<strong>').
array_walk($keys, '_search_excerpt_replace');
$text = preg_replace('/('. implode('|', $keys) .')/i', '<strong>\0</strong>', $text);
$text = preg_replace('/\b('. implode('|', $keys) .')\b/iu', '<strong>\0</strong>', $text);
return $text;
}
@ -696,7 +699,7 @@ function search_excerpt($keys, $text) {
* Helper function for array_walk in search_except.
*/
function _search_excerpt_replace($text) {
return preg_quote($text);
return preg_quote($text, '/');
}
/**

33
modules/search/search.module
View File

@ -607,18 +607,20 @@ function search_data($keys = NULL, $type = 'node') {
function search_excerpt($keys, $text) {
$keys = search_keywords_split($keys);
$text = strip_tags(str_replace(array('<', '>'), array(' <', '> '), $text));
array_walk($keys, '_search_excerpt_replace');
$workkeys = $keys;
// Extract a fragment per keyword for at most 4 keywords.
// First we collect ranges of text around each keyword, starting/ending
// at spaces.
// If the fragment is too short, we look for second occurences.
// If the sum of all fragments is too short, we look for second occurences.
$ranges = array();
$included = array();
$length = 0;
while ($length < 256) {
foreach ($keys as $k => $key) {
while ($length < 256 && count($workkeys)) {
foreach ($workkeys as $k => $key) {
if (strlen($key) == 0) {
unset($keys[$k]);
unset($workkeys[$k]);
continue;
}
if ($length >= 256) {
@ -629,8 +631,10 @@ function search_excerpt($keys, $text) {
if (!isset($included[$key])) {
$included[$key] = 0;
}
// Note: workaround for lack of stripos() in PHP4
if (($p = strpos($text, stristr(substr($text, $included[$key]), $key), $included[$key])) !== false) {
// Locate a keyword (position $p), then locate a space in front (position
// $q) and behind it (position $s)
if (preg_match('/\b'. $key .'\b/iu', $text, $match, PREG_OFFSET_CAPTURE, $included[$key])) {
$p = $match[0][1];
if (($q = strpos($text, ' ', max(0, $p - 60))) !== false) {
$end = substr($text, $p, 80);
if (($s = strrpos($end, ' ')) !== false) {
@ -639,23 +643,23 @@ function search_excerpt($keys, $text) {
$included[$key] = $p + 1;
}
else {
unset($keys[$k]);
unset($workkeys[$k]);
}
}
else {
unset($keys[$k]);
unset($workkeys[$k]);
}
}
else {
unset($keys[$k]);
unset($workkeys[$k]);
}
}
}
// If we didn't find anything, return the beginning.
if (count($ranges) == 0 || count($keys) == 0) {
if (count($ranges) == 0) {
return truncate_utf8($text, 256) . ' ...';
}
}
// Sort the text ranges by starting position.
ksort($ranges);
@ -684,11 +688,10 @@ function search_excerpt($keys, $text) {
foreach ($newranges as $from => $to) {
$out[] = substr($text, $from, $to - $from);
}
$text = '... '. implode(' ... ', $out) .' ...';
$text = (isset($newranges[0]) ? '' : '... '). implode(' ... ', $out) .' ...';
// Highlight keywords. Must be done at once to prevent conflicts ('strong' and '<strong>').
array_walk($keys, '_search_excerpt_replace');
$text = preg_replace('/('. implode('|', $keys) .')/i', '<strong>\0</strong>', $text);
$text = preg_replace('/\b('. implode('|', $keys) .')\b/iu', '<strong>\0</strong>', $text);
return $text;
}
@ -696,7 +699,7 @@ function search_excerpt($keys, $text) {
* Helper function for array_walk in search_except.
*/
function _search_excerpt_replace($text) {
return preg_quote($text);
return preg_quote($text, '/');
}
/**