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Diffstat (limited to 'plugins/prefilter.whitespace_control.php')
-rw-r--r-- | plugins/prefilter.whitespace_control.php | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/plugins/prefilter.whitespace_control.php b/plugins/prefilter.whitespace_control.php new file mode 100644 index 0000000..fa6b854 --- /dev/null +++ b/plugins/prefilter.whitespace_control.php @@ -0,0 +1,63 @@ +<?php + +/** + * Smarty Whitespace Control + * + * {-tag} remove white space infront of tag up to the previous non-whitespace character or beginning of the line + * "text \n\n\t {-tag}" -> "text \n\n{tag}" + * "text \n\n\t text\t {-tag}" -> "text \n\n\t text{tag}" + * {--tag} remove white space infront of tag up to the previous non-whitespace character + * "text \n\n\t {--tag}" -> "text{tag}" + * "text \n\n\t text\t {--tag}" -> "text \n\n\t text{tag}" + * {+-tag} + * {-+tag} replace white space infront of tag up to the previous non-whitespace character by a single line-break + * "text \n\n\t {-+tag}" -> "text\n{tag}" + * "text \n\n\t text\t {-+tag}" -> "text \n\n\t text\n{tag}" + * + * {tag-} remove white space after tag up to the next non-whitespace character or end of the line + * "{tag-} \n\n\t text" -> "{tag}\n\n\t text" + * "{tag-} text \n\n\t text" -> "{tag}text \n\n\t text" + * {tag--} remove white space after tag up to the next non-whitespace character + * "{tag--} \n\n\t text" -> "{tag}text" + * "{tag--} text \n\n\t text" -> "{tag}text \n\n\t text" + * {tag+-} + * {tag-+} replace white space after tag up to the next non-whitespace character by a single line-break + * "{tag-+} \n\n\t text" -> "{tag}\n\ntext" + * "{tag-+} text \n\n\t text" -> "{tag}\n\ntext \n\n\t text" + * + * {tag+} replace white space after tag up to the end of the line with an additional line-break + * "{tag+} \n\t text" -> "{tag}\n\n\t text" + * "{tag+} text \n\n\t text" -> "{tag}\n\ntext \n\n\t text" + * + * Any combination of the above, say {--tag+} is possible. Any + modifiers are executed before - modifiers, so + * "{tag+-}{--tag}" will lead to "{tag}{tag}" + * + * NOTE: {tag+} and {tag-+} cause two trailing \n. This is done because PHP itself throws away the first \n. + * So \n\n in the template will lead to \n in the output + * + * @param string $string raw template source + * @param Smarty_Internal_Template $template Template instance + * @return string raw template source after whitespace control was applied + * @author Rodney Rehm + */ +function smarty_prefilter_whitespace_control($string, Smarty_Internal_Template $template) { + $ldelim = $template->smarty->left_delimiter; + $rdelim = $template->smarty->right_delimiter; + $_ldelim = preg_quote($ldelim); + $_rdelim = preg_quote($rdelim); + + // remove preceeding whitepsace preserving a single line-break + $string = preg_replace('#\s*'. $_ldelim .'(?:-\+|\+-)#', "\n" . $ldelim, $string); + // remove trailing whitespace preserving s single line-break + $string = preg_replace('#(?:\+-|-\+)'. $_rdelim .'\s*#', $rdelim . "\n\n", $string); + + // remove preceeding whitepsace + $string = preg_replace('#\s*'. $_ldelim .'--|[^\S\r\n]*'. $_ldelim .'-#', $ldelim, $string); + // remove trailing whitespace + $string = preg_replace('#--'. $_rdelim .'\s*|-'. $_rdelim .'[^\S\r\n]*#', $rdelim, $string); + + // force trailing line-break + $string = preg_replace('#\+'. $_rdelim .'(?:\s*[\r\n]|[^\S\r\n]*)#', $rdelim . "\n\n", $string); + + return $string; +} |