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<?php
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// $Id: geshifilter.conflicts.inc,v 1.6 2009/07/12 15:00:28 soxofaan Exp $
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/**
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* @file
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* Implementation of the conflict detection feature of the GeSHi filter.
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*/
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require_once drupal_get_path('module', 'geshifilter') .'/geshifilter.inc';
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/**
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* Menu callback for filter conflicts page
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*/
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function geshifilter_admin_filter_conflicts($check_only=FALSE) {
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// start
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$output = '';
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// check if GeSHi library is available
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$geshi_library = _geshifilter_check_geshi_library();
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if (!$geshi_library['success']) {
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if (!$check_only) {
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drupal_set_message($geshi_library['message'], 'error');
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}
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return $output;
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}
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$alerts = array();
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$conflict_detectors = array(
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'filter/0' => '_geshifilter_htmlfilter_conflicts',
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'codefilter/0' => '_geshifilter_codefilter_conflicts',
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);
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foreach (filter_formats() as $format => $input_format) {
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// Get the filters in this input format
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$filters = filter_list_format($format);
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// look if GeSHi is enabled in this input format
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if (isset($filters['geshifilter/0'])) {
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$geshifilter = $filters['geshifilter/0'];
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// Check if possibly conflicting filters are also present in input format
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foreach ($conflict_detectors as $filter_key => $conflict_detector) {
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// does this filter exist in the input format?
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if (array_key_exists($filter_key, $filters)) {
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$cfilter = $filters[$filter_key];
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$conflicts = $conflict_detector($format, $cfilter, $geshifilter);
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foreach ($conflicts as $conflict) {
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$alerts[] = array(
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l(t($input_format->name), "admin/settings/filters/$format"),
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$cfilter->name,
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$conflict['description'],
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$conflict['solution'],
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);
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}
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}
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}
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}
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}
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if ($check_only) {
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return count($alerts);
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}
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else {
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// show alerts
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if (count($alerts) == 0) {
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$alerts[] = array(array('data' => t('No known filter conflicts were detected.'), 'colspan' => 4));
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}
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$header = array(t('Input format'), t('Filter'), t('Description'), t('Possible solutions'));
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$output .= theme('table', $header, $alerts);
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return $output;
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}
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}
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/**
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* conflict detection for html filter
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*/
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function _geshifilter_htmlfilter_conflicts($format, $cfilter, $geshifilter) {
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$conflicts = array();
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// check order
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if ($cfilter->weight >= $geshifilter->weight) {
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$conflicts[] = array(
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'description' => t('%cfilter should not come after %geshifilter to prevent loss of layout and highlighting.',
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array('%cfilter' => $cfilter->name, '%geshifilter' => $geshifilter->name)),
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'solution' => l(t('Rearrange filters'), "admin/settings/filters/$format/order"),
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);
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}
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// check tag escaping of html filter
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if (variable_get("filter_html_$format", FILTER_HTML_STRIP) == FILTER_HTML_ESCAPE) {
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$conflicts[] = array(
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'description' => t('%cfilter is configured to "Escape all tags", which is likely to cause problems with %geshifilter.',
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array('%cfilter' => $cfilter->name, '%geshifilter' => $geshifilter->name)),
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'solution' => l(t('Configure HTML filtering to "Strip disallowed tags"'), "admin/settings/filters/$format/configure", array('html' => TRUE)),
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);
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}
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return $conflicts;
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}
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/**
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* Conflict detection for codefilter.
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*/
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function _geshifilter_codefilter_conflicts($format, $cfilter, $geshifilter) {
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$conflicts = array();
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if (in_array(GESHIFILTER_BRACKETS_ANGLE, array_filter(_geshifilter_tag_styles($format)))) {
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list($generic_code_tags, $language_tags, $tag_to_lang) = _geshifilter_get_tags($format);
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if (in_array('code', $generic_code_tags) || in_array('code', $language_tags)) {
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$conflicts[] = array(
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'description' => t('%cfilter and %geshifilter trigger on the same tag "<code>".',
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array('%cfilter' => $cfilter->name, '%geshifilter' => $geshifilter->name)),
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'solution' => t('Remove "code" as generic syntax highlighting tag for %geshifilter, limit %geshifilter to tag style "[foo]" only or disable %cfilter',
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array('%cfilter' => $cfilter->name, '%geshifilter' => $geshifilter->name)),
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);
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}
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}
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return $conflicts;
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}
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