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DivinerSymbolRemarkupRule.php
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Mon, Jul 15, 17:34

DivinerSymbolRemarkupRule.php
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<?php
final class DivinerSymbolRemarkupRule extends PhutilRemarkupRule {
const KEY_RULE_ATOM_REF = 'rule.diviner.atomref';
public function getPriority() {
return 200.0;
}
public function apply($text) {
// Grammar here is:
//
// rule = '@{' maybe_type name maybe_title '}'
// maybe_type = null | type ':' | type '@' book ':'
// name = name | name '@' context
// maybe_title = null | '|' title
//
// So these are all valid:
//
// @{name}
// @{type : name}
// @{name | title}
// @{type @ book : name @ context | title}
return preg_replace_callback(
'/(?:^|\B)@{'.
'(?:(?P<type>[^:]+?):)?'.
'(?P<name>[^}|]+?)'.
'(?:[|](?P<title>[^}]+))?'.
'}/',
array($this, 'markupSymbol'),
$text);
}
public function markupSymbol(array $matches) {
if (!$this->isFlatText($matches[0])) {
return $matches[0];
}
$type = (string)idx($matches, 'type');
$name = (string)$matches['name'];
$title = (string)idx($matches, 'title');
// Collapse sequences of whitespace into a single space.
$type = preg_replace('/\s+/', ' ', trim($type));
$name = preg_replace('/\s+/', ' ', trim($name));
$title = preg_replace('/\s+/', ' ', trim($title));
$ref = array();
if (strpos($type, '@') !== false) {
list($type, $book) = explode('@', $type, 2);
$ref['type'] = trim($type);
$ref['book'] = trim($book);
} else {
$ref['type'] = $type;
}
if (strpos($name, '@') !== false) {
list($name, $context) = explode('@', $name, 2);
$ref['name'] = trim($name);
$ref['context'] = trim($context);
} else {
$ref['name'] = $name;
}
$ref['title'] = nonempty($title, $name);
foreach ($ref as $key => $value) {
if ($value === '') {
unset($ref[$key]);
}
}
$engine = $this->getEngine();
$token = $engine->storeText('');
$key = self::KEY_RULE_ATOM_REF;
$data = $engine->getTextMetadata($key, array());
$data[$token] = $ref;
$engine->setTextMetadata($key, $data);
return $token;
}
public function didMarkupText() {
$engine = $this->getEngine();
$key = self::KEY_RULE_ATOM_REF;
$data = $engine->getTextMetadata($key, array());
$renderer = $engine->getConfig('diviner.renderer');
foreach ($data as $token => $ref_dict) {
$ref = DivinerAtomRef::newFromDictionary($ref_dict);
$title = $ref->getTitle();
$href = null;
if ($renderer) {
// Here, we're generating documentation. If possible, we want to find
// the real atom ref so we can render the correct default title and
// render invalid links in an alternate style.
$ref = $renderer->normalizeAtomRef($ref);
if ($ref) {
$title = nonempty($ref->getTitle(), $ref->getName());
$href = $renderer->getHrefForAtomRef($ref);
}
} else {
// Here, we're generating comment text or something like that. Just
// link to Diviner and let it sort things out.
$href = id(new PhutilURI('/diviner/find/'))
->setQueryParams(
array(
'book' => $ref->getBook(),
'name' => $ref->getName(),
'type' => $ref->getType(),
'context' => $ref->getContext(),
'jump' => true,
));
}
// TODO: This probably is not the best place to do this. Move it somewhere
// better when it becomes more clear where it should actually go.
if ($ref) {
switch ($ref->getType()) {
case 'function':
case 'method':
$title = $title.'()';
break;
}
}
if ($this->getEngine()->isTextMode()) {
if ($href) {
$link = $title.' <'.PhabricatorEnv::getProductionURI($href).'>';
} else {
$link = $title;
}
} else if ($href) {
if ($this->getEngine()->isHTMLMailMode()) {
$href = PhabricatorEnv::getProductionURI($href);
}
$link = $this->newTag(
'a',
array(
'class' => 'atom-ref',
'href' => $href,
),
$title);
} else {
$link = $this->newTag(
'span',
array(
'class' => 'atom-ref-invalid',
),
$title);
}
$engine->overwriteStoredText($token, $link);
}
}
}

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