764 lines
25 KiB
PHP
764 lines
25 KiB
PHP
<?php
|
|
/**
|
|
* base include file for SimpleTest
|
|
* @package SimpleTest
|
|
* @subpackage MockObjects
|
|
* @version $Id: parser.php 1723 2008-04-08 00:34:10Z lastcraft $
|
|
*/
|
|
|
|
/**#@+
|
|
* Lexer mode stack constants
|
|
*/
|
|
foreach (array('LEXER_ENTER', 'LEXER_MATCHED',
|
|
'LEXER_UNMATCHED', 'LEXER_EXIT',
|
|
'LEXER_SPECIAL') as $i => $constant) {
|
|
if (! defined($constant)) {
|
|
define($constant, $i + 1);
|
|
}
|
|
}
|
|
/**#@-*/
|
|
|
|
/**
|
|
* Compounded regular expression. Any of
|
|
* the contained patterns could match and
|
|
* when one does, it's label is returned.
|
|
* @package SimpleTest
|
|
* @subpackage WebTester
|
|
*/
|
|
class ParallelRegex {
|
|
var $_patterns;
|
|
var $_labels;
|
|
var $_regex;
|
|
var $_case;
|
|
|
|
/**
|
|
* Constructor. Starts with no patterns.
|
|
* @param boolean $case True for case sensitive, false
|
|
* for insensitive.
|
|
* @access public
|
|
*/
|
|
function ParallelRegex($case) {
|
|
$this->_case = $case;
|
|
$this->_patterns = array();
|
|
$this->_labels = array();
|
|
$this->_regex = null;
|
|
}
|
|
|
|
/**
|
|
* Adds a pattern with an optional label.
|
|
* @param string $pattern Perl style regex, but ( and )
|
|
* lose the usual meaning.
|
|
* @param string $label Label of regex to be returned
|
|
* on a match.
|
|
* @access public
|
|
*/
|
|
function addPattern($pattern, $label = true) {
|
|
$count = count($this->_patterns);
|
|
$this->_patterns[$count] = $pattern;
|
|
$this->_labels[$count] = $label;
|
|
$this->_regex = null;
|
|
}
|
|
|
|
/**
|
|
* Attempts to match all patterns at once against
|
|
* a string.
|
|
* @param string $subject String to match against.
|
|
* @param string $match First matched portion of
|
|
* subject.
|
|
* @return boolean True on success.
|
|
* @access public
|
|
*/
|
|
function match($subject, &$match) {
|
|
if (count($this->_patterns) == 0) {
|
|
return false;
|
|
}
|
|
if (! preg_match($this->_getCompoundedRegex(), $subject, $matches)) {
|
|
$match = '';
|
|
return false;
|
|
}
|
|
$match = $matches[0];
|
|
for ($i = 1; $i < count($matches); $i++) {
|
|
if ($matches[$i]) {
|
|
return $this->_labels[$i - 1];
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Compounds the patterns into a single
|
|
* regular expression separated with the
|
|
* "or" operator. Caches the regex.
|
|
* Will automatically escape (, ) and / tokens.
|
|
* @param array $patterns List of patterns in order.
|
|
* @access private
|
|
*/
|
|
function _getCompoundedRegex() {
|
|
if ($this->_regex == null) {
|
|
for ($i = 0, $count = count($this->_patterns); $i < $count; $i++) {
|
|
$this->_patterns[$i] = '(' . str_replace(
|
|
array('/', '(', ')'),
|
|
array('\/', '\(', '\)'),
|
|
$this->_patterns[$i]) . ')';
|
|
}
|
|
$this->_regex = "/" . implode("|", $this->_patterns) . "/" . $this->_getPerlMatchingFlags();
|
|
}
|
|
return $this->_regex;
|
|
}
|
|
|
|
/**
|
|
* Accessor for perl regex mode flags to use.
|
|
* @return string Perl regex flags.
|
|
* @access private
|
|
*/
|
|
function _getPerlMatchingFlags() {
|
|
return ($this->_case ? "msS" : "msSi");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* States for a stack machine.
|
|
* @package SimpleTest
|
|
* @subpackage WebTester
|
|
*/
|
|
class SimpleStateStack {
|
|
var $_stack;
|
|
|
|
/**
|
|
* Constructor. Starts in named state.
|
|
* @param string $start Starting state name.
|
|
* @access public
|
|
*/
|
|
function SimpleStateStack($start) {
|
|
$this->_stack = array($start);
|
|
}
|
|
|
|
/**
|
|
* Accessor for current state.
|
|
* @return string State.
|
|
* @access public
|
|
*/
|
|
function getCurrent() {
|
|
return $this->_stack[count($this->_stack) - 1];
|
|
}
|
|
|
|
/**
|
|
* Adds a state to the stack and sets it
|
|
* to be the current state.
|
|
* @param string $state New state.
|
|
* @access public
|
|
*/
|
|
function enter($state) {
|
|
array_push($this->_stack, $state);
|
|
}
|
|
|
|
/**
|
|
* Leaves the current state and reverts
|
|
* to the previous one.
|
|
* @return boolean False if we drop off
|
|
* the bottom of the list.
|
|
* @access public
|
|
*/
|
|
function leave() {
|
|
if (count($this->_stack) == 1) {
|
|
return false;
|
|
}
|
|
array_pop($this->_stack);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Accepts text and breaks it into tokens.
|
|
* Some optimisation to make the sure the
|
|
* content is only scanned by the PHP regex
|
|
* parser once. Lexer modes must not start
|
|
* with leading underscores.
|
|
* @package SimpleTest
|
|
* @subpackage WebTester
|
|
*/
|
|
class SimpleLexer {
|
|
var $_regexes;
|
|
var $_parser;
|
|
var $_mode;
|
|
var $_mode_handlers;
|
|
var $_case;
|
|
|
|
/**
|
|
* Sets up the lexer in case insensitive matching
|
|
* by default.
|
|
* @param SimpleSaxParser $parser Handling strategy by
|
|
* reference.
|
|
* @param string $start Starting handler.
|
|
* @param boolean $case True for case sensitive.
|
|
* @access public
|
|
*/
|
|
function SimpleLexer(&$parser, $start = "accept", $case = false) {
|
|
$this->_case = $case;
|
|
$this->_regexes = array();
|
|
$this->_parser = &$parser;
|
|
$this->_mode = &new SimpleStateStack($start);
|
|
$this->_mode_handlers = array($start => $start);
|
|
}
|
|
|
|
/**
|
|
* Adds a token search pattern for a particular
|
|
* parsing mode. The pattern does not change the
|
|
* current mode.
|
|
* @param string $pattern Perl style regex, but ( and )
|
|
* lose the usual meaning.
|
|
* @param string $mode Should only apply this
|
|
* pattern when dealing with
|
|
* this type of input.
|
|
* @access public
|
|
*/
|
|
function addPattern($pattern, $mode = "accept") {
|
|
if (! isset($this->_regexes[$mode])) {
|
|
$this->_regexes[$mode] = new ParallelRegex($this->_case);
|
|
}
|
|
$this->_regexes[$mode]->addPattern($pattern);
|
|
if (! isset($this->_mode_handlers[$mode])) {
|
|
$this->_mode_handlers[$mode] = $mode;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Adds a pattern that will enter a new parsing
|
|
* mode. Useful for entering parenthesis, strings,
|
|
* tags, etc.
|
|
* @param string $pattern Perl style regex, but ( and )
|
|
* lose the usual meaning.
|
|
* @param string $mode Should only apply this
|
|
* pattern when dealing with
|
|
* this type of input.
|
|
* @param string $new_mode Change parsing to this new
|
|
* nested mode.
|
|
* @access public
|
|
*/
|
|
function addEntryPattern($pattern, $mode, $new_mode) {
|
|
if (! isset($this->_regexes[$mode])) {
|
|
$this->_regexes[$mode] = new ParallelRegex($this->_case);
|
|
}
|
|
$this->_regexes[$mode]->addPattern($pattern, $new_mode);
|
|
if (! isset($this->_mode_handlers[$new_mode])) {
|
|
$this->_mode_handlers[$new_mode] = $new_mode;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Adds a pattern that will exit the current mode
|
|
* and re-enter the previous one.
|
|
* @param string $pattern Perl style regex, but ( and )
|
|
* lose the usual meaning.
|
|
* @param string $mode Mode to leave.
|
|
* @access public
|
|
*/
|
|
function addExitPattern($pattern, $mode) {
|
|
if (! isset($this->_regexes[$mode])) {
|
|
$this->_regexes[$mode] = new ParallelRegex($this->_case);
|
|
}
|
|
$this->_regexes[$mode]->addPattern($pattern, "__exit");
|
|
if (! isset($this->_mode_handlers[$mode])) {
|
|
$this->_mode_handlers[$mode] = $mode;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Adds a pattern that has a special mode. Acts as an entry
|
|
* and exit pattern in one go, effectively calling a special
|
|
* parser handler for this token only.
|
|
* @param string $pattern Perl style regex, but ( and )
|
|
* lose the usual meaning.
|
|
* @param string $mode Should only apply this
|
|
* pattern when dealing with
|
|
* this type of input.
|
|
* @param string $special Use this mode for this one token.
|
|
* @access public
|
|
*/
|
|
function addSpecialPattern($pattern, $mode, $special) {
|
|
if (! isset($this->_regexes[$mode])) {
|
|
$this->_regexes[$mode] = new ParallelRegex($this->_case);
|
|
}
|
|
$this->_regexes[$mode]->addPattern($pattern, "_$special");
|
|
if (! isset($this->_mode_handlers[$special])) {
|
|
$this->_mode_handlers[$special] = $special;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Adds a mapping from a mode to another handler.
|
|
* @param string $mode Mode to be remapped.
|
|
* @param string $handler New target handler.
|
|
* @access public
|
|
*/
|
|
function mapHandler($mode, $handler) {
|
|
$this->_mode_handlers[$mode] = $handler;
|
|
}
|
|
|
|
/**
|
|
* Splits the page text into tokens. Will fail
|
|
* if the handlers report an error or if no
|
|
* content is consumed. If successful then each
|
|
* unparsed and parsed token invokes a call to the
|
|
* held listener.
|
|
* @param string $raw Raw HTML text.
|
|
* @return boolean True on success, else false.
|
|
* @access public
|
|
*/
|
|
function parse($raw) {
|
|
if (! isset($this->_parser)) {
|
|
return false;
|
|
}
|
|
$length = strlen($raw);
|
|
while (is_array($parsed = $this->_reduce($raw))) {
|
|
list($raw, $unmatched, $matched, $mode) = $parsed;
|
|
if (! $this->_dispatchTokens($unmatched, $matched, $mode)) {
|
|
return false;
|
|
}
|
|
if ($raw === '') {
|
|
return true;
|
|
}
|
|
if (strlen($raw) == $length) {
|
|
return false;
|
|
}
|
|
$length = strlen($raw);
|
|
}
|
|
if (! $parsed) {
|
|
return false;
|
|
}
|
|
return $this->_invokeParser($raw, LEXER_UNMATCHED);
|
|
}
|
|
|
|
/**
|
|
* Sends the matched token and any leading unmatched
|
|
* text to the parser changing the lexer to a new
|
|
* mode if one is listed.
|
|
* @param string $unmatched Unmatched leading portion.
|
|
* @param string $matched Actual token match.
|
|
* @param string $mode Mode after match. A boolean
|
|
* false mode causes no change.
|
|
* @return boolean False if there was any error
|
|
* from the parser.
|
|
* @access private
|
|
*/
|
|
function _dispatchTokens($unmatched, $matched, $mode = false) {
|
|
if (! $this->_invokeParser($unmatched, LEXER_UNMATCHED)) {
|
|
return false;
|
|
}
|
|
if (is_bool($mode)) {
|
|
return $this->_invokeParser($matched, LEXER_MATCHED);
|
|
}
|
|
if ($this->_isModeEnd($mode)) {
|
|
if (! $this->_invokeParser($matched, LEXER_EXIT)) {
|
|
return false;
|
|
}
|
|
return $this->_mode->leave();
|
|
}
|
|
if ($this->_isSpecialMode($mode)) {
|
|
$this->_mode->enter($this->_decodeSpecial($mode));
|
|
if (! $this->_invokeParser($matched, LEXER_SPECIAL)) {
|
|
return false;
|
|
}
|
|
return $this->_mode->leave();
|
|
}
|
|
$this->_mode->enter($mode);
|
|
return $this->_invokeParser($matched, LEXER_ENTER);
|
|
}
|
|
|
|
/**
|
|
* Tests to see if the new mode is actually to leave
|
|
* the current mode and pop an item from the matching
|
|
* mode stack.
|
|
* @param string $mode Mode to test.
|
|
* @return boolean True if this is the exit mode.
|
|
* @access private
|
|
*/
|
|
function _isModeEnd($mode) {
|
|
return ($mode === "__exit");
|
|
}
|
|
|
|
/**
|
|
* Test to see if the mode is one where this mode
|
|
* is entered for this token only and automatically
|
|
* leaves immediately afterwoods.
|
|
* @param string $mode Mode to test.
|
|
* @return boolean True if this is the exit mode.
|
|
* @access private
|
|
*/
|
|
function _isSpecialMode($mode) {
|
|
return (strncmp($mode, "_", 1) == 0);
|
|
}
|
|
|
|
/**
|
|
* Strips the magic underscore marking single token
|
|
* modes.
|
|
* @param string $mode Mode to decode.
|
|
* @return string Underlying mode name.
|
|
* @access private
|
|
*/
|
|
function _decodeSpecial($mode) {
|
|
return substr($mode, 1);
|
|
}
|
|
|
|
/**
|
|
* Calls the parser method named after the current
|
|
* mode. Empty content will be ignored. The lexer
|
|
* has a parser handler for each mode in the lexer.
|
|
* @param string $content Text parsed.
|
|
* @param boolean $is_match Token is recognised rather
|
|
* than unparsed data.
|
|
* @access private
|
|
*/
|
|
function _invokeParser($content, $is_match) {
|
|
if (($content === '') || ($content === false)) {
|
|
return true;
|
|
}
|
|
$handler = $this->_mode_handlers[$this->_mode->getCurrent()];
|
|
return $this->_parser->$handler($content, $is_match);
|
|
}
|
|
|
|
/**
|
|
* Tries to match a chunk of text and if successful
|
|
* removes the recognised chunk and any leading
|
|
* unparsed data. Empty strings will not be matched.
|
|
* @param string $raw The subject to parse. This is the
|
|
* content that will be eaten.
|
|
* @return array/boolean Three item list of unparsed
|
|
* content followed by the
|
|
* recognised token and finally the
|
|
* action the parser is to take.
|
|
* True if no match, false if there
|
|
* is a parsing error.
|
|
* @access private
|
|
*/
|
|
function _reduce($raw) {
|
|
if ($action = $this->_regexes[$this->_mode->getCurrent()]->match($raw, $match)) {
|
|
$unparsed_character_count = strpos($raw, $match);
|
|
$unparsed = substr($raw, 0, $unparsed_character_count);
|
|
$raw = substr($raw, $unparsed_character_count + strlen($match));
|
|
return array($raw, $unparsed, $match, $action);
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Breaks HTML into SAX events.
|
|
* @package SimpleTest
|
|
* @subpackage WebTester
|
|
*/
|
|
class SimpleHtmlLexer extends SimpleLexer {
|
|
|
|
/**
|
|
* Sets up the lexer with case insensitive matching
|
|
* and adds the HTML handlers.
|
|
* @param SimpleSaxParser $parser Handling strategy by
|
|
* reference.
|
|
* @access public
|
|
*/
|
|
function SimpleHtmlLexer(&$parser) {
|
|
$this->SimpleLexer($parser, 'text');
|
|
$this->mapHandler('text', 'acceptTextToken');
|
|
$this->_addSkipping();
|
|
foreach ($this->_getParsedTags() as $tag) {
|
|
$this->_addTag($tag);
|
|
}
|
|
$this->_addInTagTokens();
|
|
}
|
|
|
|
/**
|
|
* List of parsed tags. Others are ignored.
|
|
* @return array List of searched for tags.
|
|
* @access private
|
|
*/
|
|
function _getParsedTags() {
|
|
return array('a', 'base', 'title', 'form', 'input', 'button', 'textarea', 'select',
|
|
'option', 'frameset', 'frame', 'label');
|
|
}
|
|
|
|
/**
|
|
* The lexer has to skip certain sections such
|
|
* as server code, client code and styles.
|
|
* @access private
|
|
*/
|
|
function _addSkipping() {
|
|
$this->mapHandler('css', 'ignore');
|
|
$this->addEntryPattern('<style', 'text', 'css');
|
|
$this->addExitPattern('</style>', 'css');
|
|
$this->mapHandler('js', 'ignore');
|
|
$this->addEntryPattern('<script', 'text', 'js');
|
|
$this->addExitPattern('</script>', 'js');
|
|
$this->mapHandler('comment', 'ignore');
|
|
$this->addEntryPattern('<!--', 'text', 'comment');
|
|
$this->addExitPattern('-->', 'comment');
|
|
}
|
|
|
|
/**
|
|
* Pattern matches to start and end a tag.
|
|
* @param string $tag Name of tag to scan for.
|
|
* @access private
|
|
*/
|
|
function _addTag($tag) {
|
|
$this->addSpecialPattern("</$tag>", 'text', 'acceptEndToken');
|
|
$this->addEntryPattern("<$tag", 'text', 'tag');
|
|
}
|
|
|
|
/**
|
|
* Pattern matches to parse the inside of a tag
|
|
* including the attributes and their quoting.
|
|
* @access private
|
|
*/
|
|
function _addInTagTokens() {
|
|
$this->mapHandler('tag', 'acceptStartToken');
|
|
$this->addSpecialPattern('\s+', 'tag', 'ignore');
|
|
$this->_addAttributeTokens();
|
|
$this->addExitPattern('/>', 'tag');
|
|
$this->addExitPattern('>', 'tag');
|
|
}
|
|
|
|
/**
|
|
* Matches attributes that are either single quoted,
|
|
* double quoted or unquoted.
|
|
* @access private
|
|
*/
|
|
function _addAttributeTokens() {
|
|
$this->mapHandler('dq_attribute', 'acceptAttributeToken');
|
|
$this->addEntryPattern('=\s*"', 'tag', 'dq_attribute');
|
|
$this->addPattern("\\\\\"", 'dq_attribute');
|
|
$this->addExitPattern('"', 'dq_attribute');
|
|
$this->mapHandler('sq_attribute', 'acceptAttributeToken');
|
|
$this->addEntryPattern("=\s*'", 'tag', 'sq_attribute');
|
|
$this->addPattern("\\\\'", 'sq_attribute');
|
|
$this->addExitPattern("'", 'sq_attribute');
|
|
$this->mapHandler('uq_attribute', 'acceptAttributeToken');
|
|
$this->addSpecialPattern('=\s*[^>\s]*', 'tag', 'uq_attribute');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Converts HTML tokens into selected SAX events.
|
|
* @package SimpleTest
|
|
* @subpackage WebTester
|
|
*/
|
|
class SimpleHtmlSaxParser {
|
|
var $_lexer;
|
|
var $_listener;
|
|
var $_tag;
|
|
var $_attributes;
|
|
var $_current_attribute;
|
|
|
|
/**
|
|
* Sets the listener.
|
|
* @param SimpleSaxListener $listener SAX event handler.
|
|
* @access public
|
|
*/
|
|
function SimpleHtmlSaxParser(&$listener) {
|
|
$this->_listener = &$listener;
|
|
$this->_lexer = &$this->createLexer($this);
|
|
$this->_tag = '';
|
|
$this->_attributes = array();
|
|
$this->_current_attribute = '';
|
|
}
|
|
|
|
/**
|
|
* Runs the content through the lexer which
|
|
* should call back to the acceptors.
|
|
* @param string $raw Page text to parse.
|
|
* @return boolean False if parse error.
|
|
* @access public
|
|
*/
|
|
function parse($raw) {
|
|
return $this->_lexer->parse($raw);
|
|
}
|
|
|
|
/**
|
|
* Sets up the matching lexer. Starts in 'text' mode.
|
|
* @param SimpleSaxParser $parser Event generator, usually $self.
|
|
* @return SimpleLexer Lexer suitable for this parser.
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function &createLexer(&$parser) {
|
|
$lexer = &new SimpleHtmlLexer($parser);
|
|
return $lexer;
|
|
}
|
|
|
|
/**
|
|
* Accepts a token from the tag mode. If the
|
|
* starting element completes then the element
|
|
* is dispatched and the current attributes
|
|
* set back to empty. The element or attribute
|
|
* name is converted to lower case.
|
|
* @param string $token Incoming characters.
|
|
* @param integer $event Lexer event type.
|
|
* @return boolean False if parse error.
|
|
* @access public
|
|
*/
|
|
function acceptStartToken($token, $event) {
|
|
if ($event == LEXER_ENTER) {
|
|
$this->_tag = strtolower(substr($token, 1));
|
|
return true;
|
|
}
|
|
if ($event == LEXER_EXIT) {
|
|
$success = $this->_listener->startElement(
|
|
$this->_tag,
|
|
$this->_attributes);
|
|
$this->_tag = '';
|
|
$this->_attributes = array();
|
|
return $success;
|
|
}
|
|
if ($token != '=') {
|
|
$this->_current_attribute = strtolower(SimpleHtmlSaxParser::decodeHtml($token));
|
|
$this->_attributes[$this->_current_attribute] = '';
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Accepts a token from the end tag mode.
|
|
* The element name is converted to lower case.
|
|
* @param string $token Incoming characters.
|
|
* @param integer $event Lexer event type.
|
|
* @return boolean False if parse error.
|
|
* @access public
|
|
*/
|
|
function acceptEndToken($token, $event) {
|
|
if (! preg_match('/<\/(.*)>/', $token, $matches)) {
|
|
return false;
|
|
}
|
|
return $this->_listener->endElement(strtolower($matches[1]));
|
|
}
|
|
|
|
/**
|
|
* Part of the tag data.
|
|
* @param string $token Incoming characters.
|
|
* @param integer $event Lexer event type.
|
|
* @return boolean False if parse error.
|
|
* @access public
|
|
*/
|
|
function acceptAttributeToken($token, $event) {
|
|
if ($this->_current_attribute) {
|
|
if ($event == LEXER_UNMATCHED) {
|
|
$this->_attributes[$this->_current_attribute] .=
|
|
SimpleHtmlSaxParser::decodeHtml($token);
|
|
}
|
|
if ($event == LEXER_SPECIAL) {
|
|
$this->_attributes[$this->_current_attribute] .=
|
|
preg_replace('/^=\s*/' , '', SimpleHtmlSaxParser::decodeHtml($token));
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* A character entity.
|
|
* @param string $token Incoming characters.
|
|
* @param integer $event Lexer event type.
|
|
* @return boolean False if parse error.
|
|
* @access public
|
|
*/
|
|
function acceptEntityToken($token, $event) {
|
|
}
|
|
|
|
/**
|
|
* Character data between tags regarded as
|
|
* important.
|
|
* @param string $token Incoming characters.
|
|
* @param integer $event Lexer event type.
|
|
* @return boolean False if parse error.
|
|
* @access public
|
|
*/
|
|
function acceptTextToken($token, $event) {
|
|
return $this->_listener->addContent($token);
|
|
}
|
|
|
|
/**
|
|
* Incoming data to be ignored.
|
|
* @param string $token Incoming characters.
|
|
* @param integer $event Lexer event type.
|
|
* @return boolean False if parse error.
|
|
* @access public
|
|
*/
|
|
function ignore($token, $event) {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Decodes any HTML entities.
|
|
* @param string $html Incoming HTML.
|
|
* @return string Outgoing plain text.
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function decodeHtml($html) {
|
|
return html_entity_decode($html, ENT_QUOTES);
|
|
}
|
|
|
|
/**
|
|
* Turns HTML into text browser visible text. Images
|
|
* are converted to their alt text and tags are supressed.
|
|
* Entities are converted to their visible representation.
|
|
* @param string $html HTML to convert.
|
|
* @return string Plain text.
|
|
* @access public
|
|
* @static
|
|
*/
|
|
function normalise($html) {
|
|
$text = preg_replace('|<!--.*?-->|', '', $html);
|
|
$text = preg_replace('|<script[^>]*>.*?</script>|', '', $text);
|
|
$text = preg_replace('|<img[^>]*alt\s*=\s*"([^"]*)"[^>]*>|', ' \1 ', $text);
|
|
$text = preg_replace('|<img[^>]*alt\s*=\s*\'([^\']*)\'[^>]*>|', ' \1 ', $text);
|
|
$text = preg_replace('|<img[^>]*alt\s*=\s*([a-zA-Z_]+)[^>]*>|', ' \1 ', $text);
|
|
$text = preg_replace('|<[^>]*>|', '', $text);
|
|
$text = SimpleHtmlSaxParser::decodeHtml($text);
|
|
$text = preg_replace('|\s+|', ' ', $text);
|
|
return trim(trim($text), "\xA0"); // TODO: The \xAO is a . Add a test for this.
|
|
}
|
|
}
|
|
|
|
/**
|
|
* SAX event handler.
|
|
* @package SimpleTest
|
|
* @subpackage WebTester
|
|
* @abstract
|
|
*/
|
|
class SimpleSaxListener {
|
|
|
|
/**
|
|
* Sets the document to write to.
|
|
* @access public
|
|
*/
|
|
function SimpleSaxListener() {
|
|
}
|
|
|
|
/**
|
|
* Start of element event.
|
|
* @param string $name Element name.
|
|
* @param hash $attributes Name value pairs.
|
|
* Attributes without content
|
|
* are marked as true.
|
|
* @return boolean False on parse error.
|
|
* @access public
|
|
*/
|
|
function startElement($name, $attributes) {
|
|
}
|
|
|
|
/**
|
|
* End of element event.
|
|
* @param string $name Element name.
|
|
* @return boolean False on parse error.
|
|
* @access public
|
|
*/
|
|
function endElement($name) {
|
|
}
|
|
|
|
/**
|
|
* Unparsed, but relevant data.
|
|
* @param string $text May include unparsed tags.
|
|
* @return boolean False on parse error.
|
|
* @access public
|
|
*/
|
|
function addContent($text) {
|
|
}
|
|
}
|
|
?>
|