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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\textformatter\s9e;
class link_helper
{
/**
* Clean up and invalidate a LINK_TEXT tag if applicable
*
* Will invalidate the tag if its replacement text is the same as the original
* text and would have no visible effect
*
* @param \s9e\TextFormatter\Parser\Tag $tag LINK_TEXT tag
* @param \s9e\TextFormatter\Parser $parser Parser
* @return void
*/
public function cleanup_tag(\s9e\TextFormatter\Parser\Tag $tag, \s9e\TextFormatter\Parser $parser)
{
// Invalidate if the content of the tag matches the text attribute
$text = substr($parser->getText(), $tag->getPos(), $tag->getLen());
if ($text === $tag->getAttribute('text'))
{
$tag->invalidate();
}
}
/**
* Create a LINK_TEXT tag inside of a link
*
* Meant to only apply to linkified URLs and [url] BBCodes without a parameter
*
* @param \s9e\TextFormatter\Parser\Tag $tag URL tag (start tag)
* @param \s9e\TextFormatter\Parser $parser Parser
* @return void
*/
public function generate_link_text_tag(\s9e\TextFormatter\Parser\Tag $tag, \s9e\TextFormatter\Parser $parser)
{
// Only create a LINK_TEXT tag if the start tag is paired with an end
// tag, which is the case with tags from the Autolink plugins and with
// the [url] BBCode when its content is used for the URL
if (!$tag->getEndTag() || !$this->should_shorten($tag, $parser->getText()))
{
return;
}
// Capture the text between the start tag and its end tag
$start = $tag->getPos() + $tag->getLen();
$end = $tag->getEndTag()->getPos();
$length = $end - $start;
$text = substr($parser->getText(), $start, $length);
// Create a tag that consumes the link's text and make it depends on this tag
$link_text_tag = $parser->addSelfClosingTag('LINK_TEXT', $start, $length, 10);
$link_text_tag->setAttribute('text', $text);
$tag->cascadeInvalidationTo($link_text_tag);
}
/**
* Test whether we should shorten this tag's text
*
* Will test whether the tag either does not use any markup or uses a single
* [url] BBCode
*
* @param \s9e\TextFormatter\Parser\Tag $tag URL tag
* @param string $text Original text
* @return bool
*/
protected function should_shorten(\s9e\TextFormatter\Parser\Tag $tag, $text)
{
return ($tag->getLen() === 0 || strtolower(substr($text, $tag->getPos(), $tag->getLen())) === '[url]');
}
/**
* Remove the board's root URL from a the start of a string
*
* @param \s9e\TextFormatter\Parser\Tag $tag LINK_TEXT tag
* @param string $board_url Forum's root URL (with trailing slash)
* @return void
*/
public function truncate_local_url(\s9e\TextFormatter\Parser\Tag $tag, $board_url)
{
$text = $tag->getAttribute('text');
if (stripos($text, $board_url) === 0 && strlen($text) > strlen($board_url))
{
$tag->setAttribute('text', substr($text, strlen($board_url)));
}
}
/**
* Truncate the replacement text set in a LINK_TEXT tag
*
* @param \s9e\TextFormatter\Parser\Tag $tag LINK_TEXT tag
* @return void
*/
public function truncate_text(\s9e\TextFormatter\Parser\Tag $tag)
{
$text = $tag->getAttribute('text');
if (utf8_strlen($text) > 55)
{
$text = utf8_substr($text, 0, 39) . ' ... ' . utf8_substr($text, -10);
$tag->setAttribute('text', $text);
}
}
}
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