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<?php |
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/** |
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* This file is part of PHP-Typography. |
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* |
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* Copyright 2014-2019 Peter Putzer. |
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* Copyright 2009-2011 KINGdesk, LLC. |
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* |
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* This program is free software; you can redistribute it and/or modify modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* |
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* *** |
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* |
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* @package mundschenk-at/php-typography |
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* @license http://www.gnu.org/licenses/gpl-2.0.html |
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*/ |
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namespace PHP_Typography\Fixes\Node_Fixes; |
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use PHP_Typography\DOM; |
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use PHP_Typography\Settings; |
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use PHP_Typography\U; |
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/** |
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* Applies spacing around dashes (if enabled). |
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* |
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* @author Peter Putzer <[email protected]> |
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* |
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* @since 5.0.0 |
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*/ |
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class Dash_Spacing_Fix extends Abstract_Node_Fix { |
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// Mandatory UTF-8 modifier. |
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const EM_DASH_SPACING = '/ |
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(?: |
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\s |
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(' . U::EM_DASH . ') |
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\s |
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) |
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(?: |
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(?<=\S) # lookbehind assertion |
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(' . U::EM_DASH . ') |
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(?=\S) # lookahead assertion |
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) |
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/xu'; |
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/** |
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* Regular expression matching cached parenthetical dash. |
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* |
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* @var string |
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*/ |
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protected $parenthetical_dash_spacing; |
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/** |
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* Regular expression matching cached interval dash. |
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* |
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* @var string |
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*/ |
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protected $interval_dash_spacing; |
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/** |
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* Replacement pattern for em-dash spacing. |
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* |
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* @var string |
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*/ |
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protected $em_dash_replacement; |
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/** |
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* Replacement pattern for parenthetical dash spacing. |
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* |
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* @var string |
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*/ |
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protected $parenthetical_dash_replacement; |
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/** |
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* Replacement pattern for interval dash spacing. |
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* |
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* @var string |
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*/ |
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protected $interval_dash_replacement; |
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/** |
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* Cached dashes style. |
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* |
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* @var \PHP_Typography\Settings\Dashes|null |
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*/ |
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protected $cached_dash_style; |
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/** |
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* Apply the fix to a given textnode. |
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* |
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* @param \DOMText $textnode Required. |
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* @param Settings $settings Required. |
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* @param bool $is_title Optional. Default false. |
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*/ |
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public function apply( \DOMText $textnode, Settings $settings, $is_title = false ) { |
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if ( empty( $settings[ Settings::DASH_SPACING ] ) ) { |
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return; |
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} |
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// Various special characters and regular expressions. |
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$s = $settings->dash_style(); |
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if ( $s != $this->cached_dash_style ) { // phpcs:ignore WordPress.PHP.StrictComparisons.LooseComparison -- object value comparison. |
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$this->update_dash_spacing_regex( $s->parenthetical_dash(), $s->parenthetical_space(), $s->interval_dash(), $s->interval_space() ); |
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$this->cached_dash_style = $s; |
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} |
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// Cache $textnode->data for this fix. |
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$node_data = $textnode->data; |
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$node_data = \preg_replace( self::EM_DASH_SPACING, $this->em_dash_replacement, $node_data ); |
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$node_data = \preg_replace( $this->parenthetical_dash_spacing, $this->parenthetical_dash_replacement, $node_data ); |
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$node_data = \preg_replace( $this->interval_dash_spacing, $this->interval_dash_replacement, $node_data ); |
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// Restore textnode content. |
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$textnode->data = $node_data; |
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} |
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/** |
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* Update the dash spacing regular expression. |
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* |
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* @param string $parenthetical The dash character used for parenthetical dashes. |
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* @param string $parenthetical_space The space character used around parenthetical dashes. |
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* @param string $interval The dash character used for interval dashes. |
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* @param string $interval_space The space character used around interval dashes. |
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*/ |
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private function update_dash_spacing_regex( $parenthetical, $parenthetical_space, $interval, $interval_space ) { |
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// Mandatory UTF-8 modifier. |
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$this->parenthetical_dash_spacing = "/ |
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(?: |
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\s |
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({$parenthetical}) |
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\s |
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) |
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/xu"; |
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// Mandatory UTF-8 modifier. |
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$this->interval_dash_spacing = "/ |
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(?: |
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(?<=\S) # lookbehind assertion |
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({$interval}) |
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(?=\S) # lookahead assertion |
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) |
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/xu"; |
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$this->em_dash_replacement = "{$interval_space}\$1\$2{$interval_space}"; // is this correct? |
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$this->parenthetical_dash_replacement = "{$parenthetical_space}\$1\$2{$parenthetical_space}"; |
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$this->interval_dash_replacement = "{$interval_space}\$1\$2{$interval_space}"; |
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} |
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} |
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mundschenk-at /
php-typography
