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Image.php
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Image.php
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<?php
// Process ![image](<src> "title")
namespace Kaoken\MarkdownIt\RulesInline;
use Exception;
use Kaoken\MarkdownIt\Common\Utils;
class Image
{
/**
* @param StateInline $state
* @param boolean $silent
* @return bool
* @throws Exception
*/
public function image(StateInline &$state, bool $silent=false): bool
{
$href = '';
$oldPos = $state->pos;
$max = $state->posMax;
if ($state->src[$state->pos] !== '!') { return false; }
if (strlen($state->src) <= $state->pos+1 || $state->src[$state->pos + 1] !== '[') { return false; }
$labelStart = $state->pos + 2;
$labelEnd = $state->md->helpers->parseLinkLabel($state, $state->pos + 1, false);
// parser failed to find ']', so it's not a valid link
if ($labelEnd < 0) { return false; }
$pos = $labelEnd + 1;
if ($pos < $max && $state->src[$pos] === '(') {
//
// Inline link
//
// [link]( <$href> "$title" )
// ^^ skipping these spaces
$pos++;
for (; $pos < $max; $pos++) {
$code = $state->src[$pos];
if (!$state->md->utils->isSpace($code) && $code !== "\n") { break; }
}
if ($pos >= $max) { return false; }
// [link]( <$href> "$title" )
// ^^^^^^ parsing link destination
$start = $pos;
$res = $state->md->helpers->parseLinkDestination($state->src, $pos, $state->posMax);
if ($res->ok) {
$href = $state->md->normalizeLink($res->str);
if ($state->md->validateLink($href)) {
$pos = $res->pos;
} else {
$href = '';
}
}
// [link]( <$href> "$title" )
// ^^ skipping these spaces
$start = $pos;
for (; $pos < $max; $pos++) {
$code = $state->src[$pos];
if (!$state->md->utils->isSpace($code) && $code !== "\n") { break; }
}
// [link]( <$href> "$title" )
// ^^^^^^^ parsing link $title
$res = $state->md->helpers->parseLinkTitle($state->src, $pos, $state->posMax);
if ($pos < $max && $start !== $pos && $res->ok) {
$title = $res->str;
$pos = $res->pos;
// [link]( <$href> "$title" )
// ^^ skipping these spaces
for (; $pos < $max; $pos++) {
$code = $state->src[$pos];
if (!$state->md->utils->isSpace($code) && $code !== "\n") { break; }
}
} else {
$title = '';
}
if ($pos >= $max || $state->src[$pos] !== ')') {
$state->pos = $oldPos;
return false;
}
$pos++;
} else {
//
// Link reference
//
if ( !isset($state->env->references) ) { return false; }
$label = false;
if ($pos < $max && $state->src[$pos] === '[') {
$start = $pos + 1;
$pos = $state->md->helpers->parseLinkLabel($state, $pos);
if ($pos >= 0) {
$label = substr($state->src, $start, ($pos++)-$start);
} else {
$pos = $labelEnd + 1;
}
} else {
$pos = $labelEnd + 1;
}
// covers $label === '' and $label === undefined
// (collapsed reference link and shortcut reference link respectively)
if (!$label) { $label = substr($state->src, $labelStart, $labelEnd-$labelStart); }
$ref = false;
$key = $state->md->utils->normalizeReference($label);
if( isset($state->env->references) && array_key_exists($key, $state->env->references)){
$ref = &$state->env->references[$key];
if ($ref) {
$href = $ref['href'];
$title = $ref['title'];
}
}
if( $ref === false ){
$state->pos = $oldPos;
return false;
}
}
//
// We found the end of the link, and know for a fact it's a valid link;
// so all that's left to do is to call tokenizer.
//
if (!$silent) {
$content = substr($state->src, $labelStart, $labelEnd-$labelStart);
$tokens = [];
$state->md->inline->parse(
$content,
$state->md,
$state->env,
$tokens
);
$token = $state->push('image', 'img', 0);
$attr = [ [ 'src', $href ], [ 'alt', '' ] ];
$token->attrs = $attr;
$token->children = &$tokens;
$token->content = $content;
if ($title) {
$token->attrs[] = [ 'title', $title ];
}
}
$state->pos = $pos;
$state->posMax = $max;
return true;
}
}