public function DOMTreeBuilder::startTag in Zircon Profile 8

Same name and namespace in other branches

1. 8.0 vendor/masterminds/html5/src/HTML5/Parser/DOMTreeBuilder.php \Masterminds\HTML5\Parser\DOMTreeBuilder::startTag()

Process the start tag.

@todo - XMLNS namespace handling (we need to parse, even if it's not valid)

• XLink, MathML and SVG namespace handling
• Omission rules: 8.1.2.4 Optional tags

Overrides EventHandler::startTag

1 call to DOMTreeBuilder::startTag()

DOMTreeBuilder::endTag in vendor/masterminds/html5/src/HTML5/Parser/DOMTreeBuilder.php

An end-tag.

File

vendor/masterminds/html5/src/HTML5/Parser/DOMTreeBuilder.php, line 259

Class

DOMTreeBuilder

Create an HTML5 DOM tree from events.

Namespace

Masterminds\HTML5\Parser

Code

public function startTag($name, $attributes = array(), $selfClosing = false) {

  // fprintf(STDOUT, $name);
  $lname = $this
    ->normalizeTagName($name);

  // Make sure we have an html element.
  if (!$this->doc->documentElement && $name !== 'html' && !$this->frag) {
    $this
      ->startTag('html');
  }

  // Set quirks mode if we're at IM_INITIAL with no doctype.
  if ($this->insertMode == static::IM_INITIAL) {
    $this->quirks = true;
    $this
      ->parseError("No DOCTYPE specified.");
  }

  // SPECIAL TAG HANDLING:
  // Spec says do this, and "don't ask."
  if ($name == 'image') {
    $name = 'img';
  }

  // Autoclose p tags where appropriate.
  if ($this->insertMode >= static::IM_IN_BODY && Elements::isA($name, Elements::AUTOCLOSE_P)) {
    $this
      ->autoclose('p');
  }

  // Set insert mode:
  switch ($name) {
    case 'html':
      $this->insertMode = static::IM_BEFORE_HEAD;
      break;
    case 'head':
      if ($this->insertMode > static::IM_BEFORE_HEAD) {
        $this
          ->parseError("Unexpected head tag outside of head context.");
      }
      else {
        $this->insertMode = static::IM_IN_HEAD;
      }
      break;
    case 'body':
      $this->insertMode = static::IM_IN_BODY;
      break;
    case 'svg':
      $this->insertMode = static::IM_IN_SVG;
      break;
    case 'math':
      $this->insertMode = static::IM_IN_MATHML;
      break;
    case 'noscript':
      if ($this->insertMode == static::IM_IN_HEAD) {
        $this->insertMode = static::IM_IN_HEAD_NOSCRIPT;
      }
      break;
  }

  // Special case handling for SVG.
  if ($this->insertMode == static::IM_IN_SVG) {
    $lname = Elements::normalizeSvgElement($lname);
  }
  $pushes = 0;

  // when we found a tag thats appears inside $nsRoots, we have to switch the defalut namespace
  if (isset($this->nsRoots[$lname]) && $this->nsStack[0][''] !== $this->nsRoots[$lname]) {
    array_unshift($this->nsStack, array(
      '' => $this->nsRoots[$lname],
    ) + $this->nsStack[0]);
    $pushes++;
  }
  $needsWorkaround = false;
  if (isset($this->options["xmlNamespaces"]) && $this->options["xmlNamespaces"]) {

    // when xmlNamespaces is true a and we found a 'xmlns' or 'xmlns:*' attribute, we should add a new item to the $nsStack
    foreach ($attributes as $aName => $aVal) {
      if ($aName === 'xmlns') {
        $needsWorkaround = $aVal;
        array_unshift($this->nsStack, array(
          '' => $aVal,
        ) + $this->nsStack[0]);
        $pushes++;
      }
      elseif ((($pos = strpos($aName, ':')) ? substr($aName, 0, $pos) : '') === 'xmlns') {
        array_unshift($this->nsStack, array(
          substr($aName, $pos + 1) => $aVal,
        ) + $this->nsStack[0]);
        $pushes++;
      }
    }
  }
  if ($this->onlyInline && Elements::isA($lname, Elements::BLOCK_TAG)) {
    $this
      ->autoclose($this->onlyInline);
    $this->onlyInline = null;
  }
  try {
    $prefix = ($pos = strpos($lname, ':')) ? substr($lname, 0, $pos) : '';
    if ($needsWorkaround !== false) {
      $xml = "<{$lname} xmlns=\"{$needsWorkaround}\" " . (strlen($prefix) && isset($this->nsStack[0][$prefix]) ? "xmlns:{$prefix}=\"" . $this->nsStack[0][$prefix] . "\"" : "") . "/>";
      $frag = new \DOMDocument('1.0', 'UTF-8');
      $frag
        ->loadXML($xml);
      $ele = $this->doc
        ->importNode($frag->documentElement, true);
    }
    else {
      if (!isset($this->nsStack[0][$prefix]) || $prefix === "" && isset($this->options[self::OPT_DISABLE_HTML_NS]) && $this->options[self::OPT_DISABLE_HTML_NS]) {
        $ele = $this->doc
          ->createElement($lname);
      }
      else {
        $ele = $this->doc
          ->createElementNS($this->nsStack[0][$prefix], $lname);
      }
    }
  } catch (\DOMException $e) {
    $this
      ->parseError("Illegal tag name: <{$lname}>. Replaced with <invalid>.");
    $ele = $this->doc
      ->createElement('invalid');
  }
  if (Elements::isA($lname, Elements::BLOCK_ONLY_INLINE)) {
    $this->onlyInline = $lname;
  }

  // When we add some namespacess, we have to track them. Later, when "endElement" is invoked, we have to remove them.
  // When we are on a void tag, we do not need to care about namesapce nesting.
  if ($pushes > 0 && !Elements::isA($name, Elements::VOID_TAG)) {

    // PHP tends to free the memory used by DOM,
    // to avoid spl_object_hash collisions whe have to avoid garbage collection of $ele storing it into $pushes
    // see https://bugs.php.net/bug.php?id=67459
    $this->pushes[spl_object_hash($ele)] = array(
      $pushes,
      $ele,
    );

    // SEE https://github.com/facebook/hhvm/issues/2962
    if (defined('HHVM_VERSION')) {
      $ele
        ->setAttribute('html5-php-fake-id-attribute', spl_object_hash($ele));
    }
  }
  foreach ($attributes as $aName => $aVal) {

    // xmlns attributes can't be set
    if ($aName === 'xmlns') {
      continue;
    }
    if ($this->insertMode == static::IM_IN_SVG) {
      $aName = Elements::normalizeSvgAttribute($aName);
    }
    elseif ($this->insertMode == static::IM_IN_MATHML) {
      $aName = Elements::normalizeMathMlAttribute($aName);
    }
    try {
      $prefix = ($pos = strpos($aName, ':')) ? substr($aName, 0, $pos) : false;
      if ($prefix === 'xmlns') {
        $ele
          ->setAttributeNs(self::NAMESPACE_XMLNS, $aName, $aVal);
      }
      elseif ($prefix !== false && isset($this->nsStack[0][$prefix])) {
        $ele
          ->setAttributeNs($this->nsStack[0][$prefix], $aName, $aVal);
      }
      else {
        $ele
          ->setAttribute($aName, $aVal);
      }
    } catch (\DOMException $e) {
      $this
        ->parseError("Illegal attribute name for tag {$name}. Ignoring: {$aName}");
      continue;
    }

    // This is necessary on a non-DTD schema, like HTML5.
    if ($aName == 'id') {
      $ele
        ->setIdAttribute('id', true);
    }
  }

  // Some elements have special processing rules. Handle those separately.
  if ($this->rules
    ->hasRules($name) && $this->frag !== $this->current) {
    $this->current = $this->rules
      ->evaluate($ele, $this->current);
  }
  else {
    $this->current
      ->appendChild($ele);

    // XXX: Need to handle self-closing tags and unary tags.
    if (!Elements::isA($name, Elements::VOID_TAG)) {
      $this->current = $ele;
    }
  }

  // This is sort of a last-ditch attempt to correct for cases where no head/body
  // elements are provided.
  if ($this->insertMode <= static::IM_BEFORE_HEAD && $name != 'head' && $name != 'html') {
    $this->insertMode = static::IM_IN_BODY;
  }

  // When we are on a void tag, we do not need to care about namesapce nesting,
  // but we have to remove the namespaces pushed to $nsStack.
  if ($pushes > 0 && Elements::isA($name, Elements::VOID_TAG)) {

    // remove the namespaced definded by current node
    for ($i = 0; $i < $pushes; $i++) {
      array_shift($this->nsStack);
    }
  }

  // Return the element mask, which the tokenizer can then use to set
  // various processing rules.
  return Elements::element($name);
}