📄 tree.php
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<?php/* vim: set expandtab tabstop=4 shiftwidth=4: */// +----------------------------------------------------------------------+// | PHP Version 4 |// +----------------------------------------------------------------------+// | Copyright (c) 1997-2002 The PHP Group |// +----------------------------------------------------------------------+// | This source file is subject to version 2.02 of the PHP license, |// | that is bundled with this package in the file LICENSE, and is |// | available at through the world-wide-web at |// | http://www.php.net/license/2_02.txt. |// | If you did not receive a copy of the PHP license and are unable to |// | obtain it through the world-wide-web, please send a note to |// | license@php.net so we can mail you a copy immediately. |// +----------------------------------------------------------------------+// | Authors: Alan Knowles <alan@akbkhome.com> |// +----------------------------------------------------------------------+//// $Id: Tree.php,v 1.5 2005/01/31 06:57:44 alan_k Exp $//// The Html Tree Component of Flexy// Designed to be used on it's own// ////// The concept:// - it builds a big tokens[] array : // - filters "Text with {placeholders}" into sprintf formated strings.// - matches closers to openers eg. token[4]->close = &token[5];// - it aliases the tokens into token[0] as children as a tree// - locates the base of the file. (flexy:startchildren.// returns a nice tree..class HTML_Template_Flexy_Tree { /** * Options for Tree: * 'ignore' => dont change {xxxX} into placeholders? * 'filename' => filename of file being parsed. (for error messages.) * 'ignore_html' => return <html> elements as strings. * 'ignore_php' => DELETE/DESTROY any php code in the original template. */ var $options = array( 'ignore' => false, // was flexyIgnore 'filename' => false, 'ignore_html' => false, 'ignore_php' => true, ); /** * Array of all tokens (eg. nodes / text / tags etc. ) * All nodes have ID's * * eg. * <b>some text</b> * [0] => Token_Tag:: * tagname = '<b>' * children = array( &tag[1] ); close = &tag[2]; * [1] => Token_Text::'some test' * [2] => Token_Tag:: * tagname = '</b>'; * * * under normal situations, the tree is built into node[0], the remaining nodes are referenced by alias. * if caching is used (the nodes > 0 will not exist, and everything will just be a child of node 0. * * * * @var array * @access public */ var $tokens = array(); var $strings = array(); /** * Run a Tokenizer and Store its results and return the tree. * It should build a DOM Tree of the HTML * * @param string $data data to parse. * @param array $options see options array. * * @access public * @return base token (really a dummy token, which contains the tree) * @static */ function construct($data,$options=array()) { // local caching! $md5 = md5($data); if (isset($GLOBALS[__CLASS__]['cache'][$md5])) { return $GLOBALS[__CLASS__]['cache'][$md5]; } $t = new HTML_Template_Flexy_Tree; $t->options = $t->options + $options; require_once 'HTML/Template/Flexy/Token.php'; $t->tokens = array(new HTML_Template_Flexy_Token); $t->tokens[0]->id =0; // process if (is_a($r = $t->tokenize($data),'PEAR_Error')) { return $r; } $t->matchClosers(); $t->buildChildren(0); //new Gtk_VarDump($_HTML_TEMPLATE_FLEXY_TOKEN['tokens'][0]); $GLOBALS[__CLASS__]['cache'][$md5] = $t->returnStart(); return $GLOBALS[__CLASS__]['cache'][$md5]; } /** * The core tokenizing part - runs the tokenizer on the data, * and stores the results in $this->tokens[] * * @param string Data to tokenize * * @return none | PEAR::Error * @access public|private * @see see also methods..... */ function tokenize($data) { require_once 'HTML/Template/Flexy/Tokenizer.php'; $tokenizer = &HTML_Template_Flexy_Tokenizer::construct($data,$this->options); // initialize state - this trys to make sure that // you dont do to many elses etc. //echo "RUNNING TOKENIZER"; // step one just tokenize it. $i=1; while ($t = $tokenizer->yylex()) { if ($t == HTML_TEMPLATE_FLEXY_TOKEN_ERROR) { return HTML_Template_Flexy::raiseError( array( "HTML_Template_Flexy_Tree::Syntax error in File: %s (Line %s)\n". "Tokenizer Error: %s\n". "Context:\n\n%s\n\n >>>>>> %s\n", $this->options['filename'], $tokenizer->yyline , $tokenizer->error, htmlspecialchars(substr($tokenizer->yy_buffer,0,$tokenizer->yy_buffer_end)), htmlspecialchars(substr($tokenizer->yy_buffer,$tokenizer->yy_buffer_end,100)) ) ,HTML_TEMPLATE_FLEXY_ERROR_SYNTAX ,HTML_TEMPLATE_FLEXY_ERROR_DIE); } if ($t == HTML_TEMPLATE_FLEXY_TOKEN_NONE) { continue; } if ($t->token == 'Php') { continue; } $i++; $this->tokens[$i] = $tokenizer->value; $this->tokens[$i]->id = $i; //print_r($_HTML_TEMPLATE_FLEXY_TOKEN['tokens'][$i]); } //echo "BUILT TOKENS"; } /** * Match the opening and closing tags eg. </B> is the closer of <B> * * aliases the ->close to the tokens[{closeid}] element * * @return none * @access public */ function matchClosers() { $res = &$this->tokens; $total = count($this->tokens); // connect open and close tags. // this is done by having a stack for each of the tag types.. // then removing it when it finds the closing one // eg. // <a href=""><img src=""></a> // ends up with a stack for <a>'s and a stack for <img>'s // // // for($i=1;$i<$total;$i++) { //echo "Checking TAG $i\n"; if (!isset($res[$i]->tag)) { continue; } $tag = strtoupper($res[$i]->tag); if ($tag{0} != '/') { // it's not a close tag.. if (!isset($stack[$tag])) { $npos = $stack[$tag]['pos'] = 0; } else { $npos = ++$stack[$tag]['pos']; } $stack[$tag][$npos] = $i; continue; } //echo "GOT END TAG: {$res[$i]->tag}\n"; $tag = substr($tag,1); if (!isset($stack[$tag]['pos'])) { continue; // unmatched } $npos = $stack[$tag]['pos']; if (!isset($stack[$tag][$npos])) { // stack is empty!!! continue; } // alias closer to opener.. $this->tokens[$stack[$tag][$npos]]->close = &$this->tokens[$i]; $stack[$tag]['pos']--; // take it off the stack so no one else uses it!!! unset($stack[$tag][$npos]); if ($stack[$tag]['pos'] < 0) { // too many closes - just ignore it.. $stack[$tag]['pos'] = 0; } continue; // new entry on stack.. } // create a dummy close for the end $i = $total; $this->tokens[$i] = new HTML_Template_Flexy_Token; $this->tokens[$i]->id = $total; $this->tokens[0]->close = &$this->tokens[$i]; // now is it possible to connect children... // now we need to GLOBALIZE!! - } /** * Build the child array for each element. * RECURSIVE FUNCTION!!!! * * does not move tokens, just aliases the child nodes into the token array. * * @param int id of node to add children to. * * @access public */ function buildChildren($id) { $base = &$this->tokens[$id]; $base->children = array(); $start = $base->id +1; $end = $base->close->id; for ($i=$start; $i<$end; $i++) { //echo "{$base->id}:{$base->tag} ADDING {$i}{$_HTML_TEMPLATE_FLEXY_TOKEN['tokens'][$i]->tag}<BR>"; //if ($base->id == 1176) { // echo "<PRE>";print_r($_HTML_TEMPLATE_FLEXY_TOKEN['tokens'][$i]); // } $base->children[] = &$this->tokens[$i]; if (isset($this->tokens[$i]->close)) { // if the close id is greater than my id - ignore it! - if ($this->tokens[$i]->close->id > $end) { continue; } $this->buildChildren($i); $i = $this->tokens[$i]->close->id; } } } /** * Locates Flexy:startchildren etc. if it is used. * and returns the base of the tree. (eg. otherwise token[0]. * * @return HTML_Template_Flexy_Token (base of tree.) * @access public */ function returnStart() { foreach(array_keys($this->tokens) as $i) { switch(true) { case isset($this->tokens[$i]->ucAttributes['FLEXYSTART']): case isset($this->tokens[$i]->ucAttributes['FLEXY:START']): $this->tokens[$i]->removeAttribute('FLEXY:START'); $this->tokens[$i]->removeAttribute('FLEXYSTART'); return $this->tokens[$i]; case isset($this->tokens[$i]->ucAttributes['FLEXYSTARTCHILDREN']): case isset($this->tokens[$i]->ucAttributes['FLEXY:STARTCHILDREN']): $this->tokens[0]->children = $this->tokens[$i]->children; return $this->tokens[0]; } } return $this->tokens[0]; } }⌨️ 快捷键说明
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