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+<?php
+/**
+ * Loads a string to be parsed.
+ */
+
+namespace Masterminds\HTML5\Parser;
+
+/*
+ *
+* Based on code from html5lib:
+
+Copyright 2009 Geoffrey Sneddon <http://gsnedders.com/>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+
+// Some conventions:
+// - /* */ indicates verbatim text from the HTML 5 specification
+// MPB: Not sure which version of the spec. Moving from HTML5lib to
+// HTML5-PHP, I have been using this version:
+// http://www.w3.org/TR/2012/CR-html5-20121217/Overview.html#contents
+//
+// - // indicates regular comments
+
+/**
+ * @deprecated since 2.4, to remove in 3.0. Use a string in the scanner instead.
+ */
+class StringInputStream implements InputStream
+{
+ /**
+ * The string data we're parsing.
+ */
+ private $data;
+
+ /**
+ * The current integer byte position we are in $data.
+ */
+ private $char;
+
+ /**
+ * Length of $data; when $char === $data, we are at the end-of-file.
+ */
+ private $EOF;
+
+ /**
+ * Parse errors.
+ */
+ public $errors = array();
+
+ /**
+ * Create a new InputStream wrapper.
+ *
+ * @param string $data Data to parse.
+ * @param string $encoding The encoding to use for the data.
+ * @param string $debug A fprintf format to use to echo the data on stdout.
+ */
+ public function __construct($data, $encoding = 'UTF-8', $debug = '')
+ {
+ $data = UTF8Utils::convertToUTF8($data, $encoding);
+ if ($debug) {
+ fprintf(STDOUT, $debug, $data, strlen($data));
+ }
+
+ // There is good reason to question whether it makes sense to
+ // do this here, since most of these checks are done during
+ // parsing, and since this check doesn't actually *do* anything.
+ $this->errors = UTF8Utils::checkForIllegalCodepoints($data);
+
+ $data = $this->replaceLinefeeds($data);
+
+ $this->data = $data;
+ $this->char = 0;
+ $this->EOF = strlen($data);
+ }
+
+ public function __toString()
+ {
+ return $this->data;
+ }
+
+ /**
+ * Replace linefeed characters according to the spec.
+ */
+ protected function replaceLinefeeds($data)
+ {
+ /*
+ * U+000D CARRIAGE RETURN (CR) characters and U+000A LINE FEED (LF) characters are treated specially.
+ * Any CR characters that are followed by LF characters must be removed, and any CR characters not
+ * followed by LF characters must be converted to LF characters. Thus, newlines in HTML DOMs are
+ * represented by LF characters, and there are never any CR characters in the input to the tokenization
+ * stage.
+ */
+ $crlfTable = array(
+ "\0" => "\xEF\xBF\xBD",
+ "\r\n" => "\n",
+ "\r" => "\n",
+ );
+
+ return strtr($data, $crlfTable);
+ }
+
+ /**
+ * Returns the current line that the tokenizer is at.
+ */
+ public function currentLine()
+ {
+ if (empty($this->EOF) || 0 === $this->char) {
+ return 1;
+ }
+ // Add one to $this->char because we want the number for the next
+ // byte to be processed.
+ return substr_count($this->data, "\n", 0, min($this->char, $this->EOF)) + 1;
+ }
+
+ /**
+ * @deprecated
+ */
+ public function getCurrentLine()
+ {
+ return $this->currentLine();
+ }
+
+ /**
+ * Returns the current column of the current line that the tokenizer is at.
+ * Newlines are column 0. The first char after a newline is column 1.
+ *
+ * @return int The column number.
+ */
+ public function columnOffset()
+ {
+ // Short circuit for the first char.
+ if (0 === $this->char) {
+ return 0;
+ }
+ // strrpos is weird, and the offset needs to be negative for what we
+ // want (i.e., the last \n before $this->char). This needs to not have
+ // one (to make it point to the next character, the one we want the
+ // position of) added to it because strrpos's behaviour includes the
+ // final offset byte.
+ $backwardFrom = $this->char - 1 - strlen($this->data);
+ $lastLine = strrpos($this->data, "\n", $backwardFrom);
+
+ // However, for here we want the length up until the next byte to be
+ // processed, so add one to the current byte ($this->char).
+ if (false !== $lastLine) {
+ $findLengthOf = substr($this->data, $lastLine + 1, $this->char - 1 - $lastLine);
+ } else {
+ // After a newline.
+ $findLengthOf = substr($this->data, 0, $this->char);
+ }
+
+ return UTF8Utils::countChars($findLengthOf);
+ }
+
+ /**
+ * @deprecated
+ */
+ public function getColumnOffset()
+ {
+ return $this->columnOffset();
+ }
+
+ /**
+ * Get the current character.
+ *
+ * @return string The current character.
+ */
+ public function current()
+ {
+ return $this->data[$this->char];
+ }
+
+ /**
+ * Advance the pointer.
+ * This is part of the Iterator interface.
+ */
+ public function next()
+ {
+ ++$this->char;
+ }
+
+ /**
+ * Rewind to the start of the string.
+ */
+ public function rewind()
+ {
+ $this->char = 0;
+ }
+
+ /**
+ * Is the current pointer location valid.
+ *
+ * @return bool Whether the current pointer location is valid.
+ */
+ public function valid()
+ {
+ return $this->char < $this->EOF;
+ }
+
+ /**
+ * Get all characters until EOF.
+ *
+ * This reads to the end of the file, and sets the read marker at the
+ * end of the file.
+ *
+ * Note this performs bounds checking.
+ *
+ * @return string Returns the remaining text. If called when the InputStream is
+ * already exhausted, it returns an empty string.
+ */
+ public function remainingChars()
+ {
+ if ($this->char < $this->EOF) {
+ $data = substr($this->data, $this->char);
+ $this->char = $this->EOF;
+
+ return $data;
+ }
+
+ return ''; // false;
+ }
+
+ /**
+ * Read to a particular match (or until $max bytes are consumed).
+ *
+ * This operates on byte sequences, not characters.
+ *
+ * Matches as far as possible until we reach a certain set of bytes
+ * and returns the matched substring.
+ *
+ * @param string $bytes Bytes to match.
+ * @param int $max Maximum number of bytes to scan.
+ *
+ * @return mixed Index or false if no match is found. You should use strong
+ * equality when checking the result, since index could be 0.
+ */
+ public function charsUntil($bytes, $max = null)
+ {
+ if ($this->char >= $this->EOF) {
+ return false;
+ }
+
+ if (0 === $max || $max) {
+ $len = strcspn($this->data, $bytes, $this->char, $max);
+ } else {
+ $len = strcspn($this->data, $bytes, $this->char);
+ }
+
+ $string = (string) substr($this->data, $this->char, $len);
+ $this->char += $len;
+
+ return $string;
+ }
+
+ /**
+ * Returns the string so long as $bytes matches.
+ *
+ * Matches as far as possible with a certain set of bytes
+ * and returns the matched substring.
+ *
+ * @param string $bytes A mask of bytes to match. If ANY byte in this mask matches the
+ * current char, the pointer advances and the char is part of the
+ * substring.
+ * @param int $max The max number of chars to read.
+ *
+ * @return string
+ */
+ public function charsWhile($bytes, $max = null)
+ {
+ if ($this->char >= $this->EOF) {
+ return false;
+ }
+
+ if (0 === $max || $max) {
+ $len = strspn($this->data, $bytes, $this->char, $max);
+ } else {
+ $len = strspn($this->data, $bytes, $this->char);
+ }
+ $string = (string) substr($this->data, $this->char, $len);
+ $this->char += $len;
+
+ return $string;
+ }
+
+ /**
+ * Unconsume characters.
+ *
+ * @param int $howMany The number of characters to unconsume.
+ */
+ public function unconsume($howMany = 1)
+ {
+ if (($this->char - $howMany) >= 0) {
+ $this->char -= $howMany;
+ }
+ }
+
+ /**
+ * Look ahead without moving cursor.
+ */
+ public function peek()
+ {
+ if (($this->char + 1) <= $this->EOF) {
+ return $this->data[$this->char + 1];
+ }
+
+ return false;
+ }
+
+ public function key()
+ {
+ return $this->char;
+ }
+}