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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 |
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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\RE; |
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use PHP_Typography\Settings; |
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use PHP_Typography\Strings; |
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use PHP_Typography\U; |
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/** |
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* Collapse spaces (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 Space_Collapse_Fix extends Abstract_Node_Fix { |
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const COLLAPSE_NORMAL_SPACES = '/[' . RE::NORMAL_SPACES . ']+/Sxu'; |
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const COLLAPSE_NON_BREAKABLE_SPACES = '/(?:[' . RE::NORMAL_SPACES . ']|' . RE::HTML_SPACES . ')*' . U::NO_BREAK_SPACE . '(?:[' . RE::NORMAL_SPACES . ']|' . RE::HTML_SPACES . ')*/Sxu'; |
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const COLLAPSE_OTHER_SPACES = '/(?:[' . RE::NORMAL_SPACES . '])*(' . RE::HTML_SPACES . ')(?:[' . RE::NORMAL_SPACES . ']|' . RE::HTML_SPACES . ')*/Sxu'; |
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const COLLAPSE_SPACES_AT_START_OF_BLOCK = '/\A(?:[' . RE::NORMAL_SPACES . ']|' . RE::HTML_SPACES . ')+/Sxu'; |
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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( $settings[ Settings::SPACE_COLLAPSE ] ) ) { |
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return; |
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} |
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// Cache textnode content. |
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$node_data = $textnode->data; |
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// Replace spaces. |
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$node_data = \preg_replace( |
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[ |
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// Normal spacing. |
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self::COLLAPSE_NORMAL_SPACES, |
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// Non-breakable space get's priority. If non-breakable space exists in a string of spaces, it collapses to a single non-breakable space. |
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self::COLLAPSE_NON_BREAKABLE_SPACES, |
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// For any other spaceing, replace with the first occurance of an unusual space character. |
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self::COLLAPSE_OTHER_SPACES, |
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], |
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[ // @codeCoverageIgnoreStart |
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' ', |
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U::NO_BREAK_SPACE, |
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'$1', |
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], // @codeCoverageIgnoreEnd |
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$node_data |
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); |
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// Remove all spacing at beginning of block level elements. |
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if ( null === DOM::get_previous_textnode( $textnode ) ) { |
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$node_data = \preg_replace( self::COLLAPSE_SPACES_AT_START_OF_BLOCK, '', $node_data ); |
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} |
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// Restore textnode content. |
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$textnode->data = $node_data; |
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} |
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} |
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mundschenk-at /
php-typography
