4 changed files with 144 additions and 30 deletions
@ -0,0 +1,120 @@ |
|||
<?php |
|||
declare(strict_types=1); |
|||
namespace dW\HTML5; |
|||
|
|||
class Printer { |
|||
|
|||
public static function serialize($node): string { |
|||
if (!$node instanceof DOMElement && !$node instanceof DOMDocument && !$node instanceof DOMDocumentFragment) { |
|||
throw new Exception(Exception::PRINTER_DOMELEMENT_DOMDOCUMENT_DOMDOCUMENTFRAG_EXPECTED, gettype($node)); |
|||
} |
|||
|
|||
# 1. Let s be a string, and initialize it to the empty string. |
|||
$s = ''; |
|||
|
|||
# 2. If the node is a template element, then let the node instead be the |
|||
# template element’s template contents (a DocumentFragment node). |
|||
// TODO |
|||
|
|||
# 3. For each child node of the node, in tree order, run the following steps: |
|||
for ($i = 0; $i < $node->childNodes->length; $i++) { |
|||
# 1. Let current node be the child node being processed. |
|||
$currentNode = $node->childNodes->item($i); |
|||
|
|||
# 2. Append the appropriate string from the following list to s: |
|||
## If current node is an Element |
|||
### If current node is an element in the HTML namespace, the MathML namespace, |
|||
### or the SVG namespace, then let tagname be current node’s local name. |
|||
### Otherwise, let tagname be current node’s qualified name. |
|||
if ($currentNode instanceof DOMElement && (is_null($currentNode->namespaceURI) || $currentNode->namespaceURI === Parser::MATHML_NAMESPACE || $currentNode->namespaceURI === Parser::SVG_NAMESPACE)) { |
|||
$tagName = $currentNode->localName; |
|||
} else { |
|||
$tagName = $currentNode->nodeName; |
|||
} |
|||
|
|||
### Append a U+003C LESS-THAN SIGN character (<), followed by tagname. |
|||
$s .= "<$tagName"; |
|||
|
|||
### For each attribute that the element has, append a U+0020 SPACE character, |
|||
### the attribute’s serialized name as described below, a U+003D EQUALS SIGN |
|||
### character (=), a U+0022 QUOTATION MARK character ("), the attribute’s value, |
|||
### escaped as described below in attribute mode, and a second U+0022 QUOTATION |
|||
### MARK character ("). |
|||
for ($j = 0; $j < $currentNode->attributes->length; $j++) { |
|||
$attr = $currentNode->attributes->item($j); |
|||
|
|||
# An attribute’s serialized name for the purposes of the previous paragraph |
|||
# must be determined as follows: |
|||
switch ($attr->namespaceURI) { |
|||
# If the attribute has no namespace |
|||
case null: |
|||
# The attribute’s serialized name is the attribute’s local name. |
|||
$name = $attr->localName; |
|||
break; |
|||
# If the attribute is in the XML namespace |
|||
case Parser::XML_NAMESPACE: |
|||
# The attribute’s serialized name is the string "xml:" followed by the |
|||
# attribute’s local name. |
|||
$name = 'xml:' . $attr->localName; |
|||
break; |
|||
# If the attribute is in the XMLNS namespace... |
|||
case Parser::XMLNS_NAMESPACE: |
|||
# ...and the attribute’s local name is xmlns |
|||
if ($attr->localName === 'xmlns') { |
|||
# The attribute’s serialized name is the string "xmlns". |
|||
$name = 'xmlns'; |
|||
} |
|||
# ...and the attribute’s local name is not xmlns |
|||
else { |
|||
# The attribute’s serialized name is the string "xmlns:" followed by the |
|||
# attribute’s local name. |
|||
$name = 'xmlns:' . $attr->localName; |
|||
} |
|||
break; |
|||
# If the attribute is in the XLink namespace |
|||
case Parser::XLINK_NAMESPACE: |
|||
# The attribute’s serialized name is the string "xlink:" followed by the |
|||
# attribute’s local name. |
|||
$name = 'xlink:' . $attr->localName; |
|||
break; |
|||
# If the attribute is in some other namespace |
|||
default: |
|||
# The attribute’s serialized name is the attribute’s qualified name. |
|||
$name = $attr->name; |
|||
} |
|||
|
|||
$value = static::escapeString($attr->value, true); |
|||
|
|||
$s .= " $name=\"$value\""; |
|||
} |
|||
|
|||
### While the exact order of attributes is UA-defined, and may depend on factors |
|||
### such as the order that the attributes were given in the original markup, the |
|||
### sort order must be stable, such that consecutive invocations of this |
|||
### algorithm serialize an element’s attributes in the same order. |
|||
// Okay. |
|||
|
|||
### Append a U+003E GREATER-THAN SIGN character (>). |
|||
$s .= '>'; |
|||
} |
|||
} |
|||
|
|||
protected static escapeString(string $string, bool $attribute = false): string { |
|||
# Escaping a string (for the purposes of the algorithm above) consists of |
|||
# running the following steps: |
|||
## 1. Replace any occurrence of the "&" character by the string "&amp;". |
|||
## 2. Replace any occurrences of the U+00A0 NO-BREAK SPACE character by the |
|||
## string "&nbsp;". |
|||
$string = str_replace(['&', chr(0x00A0)], ['&amp;', '&nbsp;'], $string); |
|||
## 3. If the algorithm was invoked in the attribute mode, replace any |
|||
## occurrences of the """ character by the string "&quot;". |
|||
## 4. If the algorithm was not invoked in the attribute mode, replace any |
|||
## occurrences of the "<" character by the string "&lt;", and any |
|||
## occurrences of the ">" character by the string "&gt;". |
|||
if ($attribute) { |
|||
$string = str_replace(['"', '<', '>'], ['&quot;', '&lt;', '&gt;'], $string); |
|||
} |
|||
|
|||
return $string; |
|||
} |
|||
} |
|||
Loading…
Reference in new issue