itx.php

来自「视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.」· PHP 代码 · 共 740 行 · 第 1/2 页

        reset($this->functions);
        while (list($func_id, $function) = each($this->functions)) {
            
            if (isset($this->callback[$function['name']])) {
            
                if ('' != $this->callback[$function['name']]['object']) {
                    $this->variableCache['__function' . $func_id . '__'] = call_user_method( 
                                                                $this->callback[$function['name']]['function'], 
                                                                $GLOBALS[$this->callback[$function['name']]['object']],
                                                                $function['args']
                                                               );
                } else {
                    $this->variableCache['__function' . $func_id . '__'] = call_user_func( 
                                                                $this->callback[$function['name']]['function'], 
                                                                $function['args'] 
                                                                );
                }
                
            }
            
        }
        
    } // end func performCallback
    
    /**
    * Returns a list of all function calls in the current template.
    *
    * @return   array
    * @access   public
    */
    function getFunctioncalls() {
        
        return $this->functions;
        
    } // end func getFunctioncalls
    
    /**
    * Replaces a function call with the given replacement.
    * 
    * @param    int       Function ID
    * @param    string    Replacement
    * @deprec
    */
    function setFunctioncontent($functionID, $replacement) {
        
        $this->variableCache['__function' . $functionID . '__'] = $replacement;
        
    } // end func setFunctioncontent
    
    /**
    * Sets a callback function.
    *
    * IT[X] templates (note the X) can contain simple function calls. 
    * "function call" means that the editor of the template can add
    * special placeholder to the template like 'func_h1("embedded in h1")'.
    * IT[X] will grab this function calls and allow you to define a callback
    * function for them. 
    *
    * This is an absolutely evil feature. If your application makes heavy
    * use of such callbacks and you're even implementing if-then etc. on 
    * the level of a template engine you're reiventing the wheel... - that's 
    * actually how PHP came into life. Anyway, sometimes it's handy.
    *
    * Consider also using XML/XSLT or native PHP. And please do not push
    * IT[X] any further into this direction of adding logics to the template
    * engine.
    *
    * For those of you ready for the X in IT[X]:
    *
    * <?php 
    * ...
    * function h_one($args) {
    *    return sprintf('<h1>%s</h1>', $args[0]);
    * }
    *
    * ... 
    * $itx = new IntegratedTemplateExtension( ... );
    * ...
    * $itx->setCallbackFunction('h1', 'h_one'); 
    * $itx->performCallback();
    * ?>
    * 
    * template: 
    * func_h1('H1 Headline');
    * 
    * @param    string    Function name in the template
    * @param    string    Name of the callback function
    * @param    string    Name of the callback object
    * @return   boolean   False on failure.
    * @throws   IT_Error
    * @access   public
    */
    function setCallbackFunction($tplfunction, $callbackfunction, $callbackobject = '') {
        
        if ('' == $tplfunction || '' == $callbackfunction)
            return new IT_Error("No template function ('$tplfunction') and/or no callback function ('$callback') given.", __FILE__, __LINE__);
        
        $this->callback[$tplfunction] = array(
                                              "function"    => $callbackfunction,
                                              "object"        => $callbackobject
                                        );            

        return true;
    } // end func setCallbackFunction
    
    /**
    * Sets the Callback function lookup table
    * 
    * @param    array    function table - array[templatefunction] = array( "function" => userfunction, "object" => userobject )
    * @access    public
    */
    function setCallbackFuntiontable($functions) {
        $this->callback = $functions;
    } // end func setCallbackFunctiontable
    
    /**
    * Recursively removes all data assiciated with a block, including all inner blocks
    *
    * @param    string  block to be removed
    */
    function removeBlockData($block) {
        
        if (isset($this->blockinner[$block])) {
            foreach ($this->blockinner[$block] as $k => $inner) 
                $this->removeBlockData($inner);
                
            unset($this->blockinner[$block]);
        }    
        
        unset($this->blocklist[$block]);
        unset($this->blockdata[$block]);
        unset($this->blockvariables[$block]);
        unset($this->touchedBlocks[$block]);
        
    } // end func removeBlockinner
    
    /**
    * Returns a list of blocknames in the template.
    *
    * @return    array    [blockname => blockname]
    * @access    public
    * @see        blockExists()
    */
    function getBlocklist() {
    
        $blocklist = array();
        foreach ($this->blocklist as $block => $content) 
            $blocklist[$block] = $block;
            
        return $blocklist;
    } // end func getBlocklist

    /**
    * Checks wheter a block exists.
    * 
    * @param    string    
    * @return    boolean
    * @access    public
    * @see        getBlocklist()
    */
    function blockExists($blockname) {
        return isset($this->blocklist[$blockname]);
    } // end func blockExists
    
    /**
    * Returns a list of variables of a block.
    *
    * @param    string    Blockname
    * @return    array    [varname => varname]
    * @access    public
    * @see        BlockvariableExists()
    */
    function getBlockvariables($block) {
        if (!isset($this->blockvariables[$block]))
            return array();
            
        $variables = array();
        foreach ($this->blockvariables[$block] as $variable => $v) {
            $variables[$variable] = $variable;
        }

        return $variables;
    } // end func getBlockvariables
    
    /**
    * Checks wheter a block variable exists.
    * 
    * @param    string    Blockname
    * @param    string    Variablename
    * @return    boolean
    * @access    public
    * @see    getBlockvariables()
    */
    function BlockvariableExists($block, $variable) {
        return isset($this->blockvariables[$block][$variable]);
    } // end func BlockvariableExists
    
    /**
    * Builds a functionlist from the template.
    */
    function buildFunctionlist() {
        
        $this->functions = array();
        
        $template = $this->template;
        $num = 0;
        
        while (preg_match($this->functionRegExp, $template, $regs))    {
        
            $pos = strpos($template, $regs[0]);
            $template = substr($template, $pos + strlen($regs[0]));
            
            $head = $this->getValue($template, ')');
            $args = array();
            
            $this->template = str_replace($regs[0] . $head . ')', '{__function' . $num . '__}', $this->template);
            $template = str_replace($regs[0] . $head . ')', '{__function' . $num . '__}', $template);
            
            while ('' != $head && $arg = $this->getValue($head, ',')) {
                $arg2 = trim($args2);
                $args[] = ('"' == $arg2{0} || "'" == $arg2{0}) ? substr($arg2, 1, -1) : $arg2;
                if ($arg == $head)                                     
                    break;
                $head = substr($head, strlen($arg) + 1);
            }    

            $this->functions[$num++] = array( 
                                                'name'    => $regs[1],
                                                'args'    => $args
                                            );            
        }

    } // end func buildFunctionlist
    
    
    function getValue($code, $delimiter) {
        if ('' == $code)
            return '';
    
        if (!is_array($delimiter)) 
            $delimiter = array( $delimiter => true );
            
        $len            = strlen($code);
        $enclosed       = false;
        $enclosed_by    = '';
        
        if (isset($delimiter[$code[0]])) {
        
            $i = 1;
            
        } else {
        
            for ($i = 0; $i < $len; ++$i) {
            
                $char = $code[$i];

                if (('"' == $char || "'" == $char) && ($char == $enclosed_by || '' == $enclosed_by) && (0 == $i || ($i > 0 && '\\' != $code[$i - 1]))) {
                
                    if (!$enclosed)
                        $enclosed_by = $char;
                    else 
                        $enclosed_by = "";
                        
                    $enclosed = !$enclosed;
                    
                }
                if (!$enclosed && isset($delimiter[$char]))
                    break;                    
                    
            }
        
        }
  
        return substr($code, 0, $i);
    } // end func getValue

        
    /**
    * Deletes one or many variables from the block variable list.
    *
    * @param    string    Blockname
    * @param    mixed        Name of one variable or array of variables ( array ( name => true ) ) to be stripped.
    */
    function deleteFromBlockvariablelist($block, $variables) {
    
        if (!is_array($variables))
            $variables = array($variables => true);
            
        reset($this->blockvariables[$block]);
        while (list($varname, $val) = each($this->blockvariables[$block])) 
            if (isset($variables[$varname])) 
                unset($this->blockvariables[$block][$varname]);
        
    } // end deleteFromBlockvariablelist

    /**
    * Updates the variable list of a block.
    *
    * @param    string    Blockname
    */    
    function updateBlockvariablelist($block) {

        preg_match_all( $this->variablesRegExp, $this->blocklist[$block], $regs );

        if (0 != count($regs[1])) {
            foreach ($regs[1] as $k => $var) {
                $this->blockvariables[$block][$var] = true;
            }
        } else {
            $this->blockvariables[$block] = array();
        }
        
        // check if any inner blocks were found
        if (isset($this->blockinner[$block]) and is_array($this->blockinner[$block]) and count($this->blockinner[$block]) > 0) {
            // loop through inner blocks, registering the variable placeholders in each
            foreach($this->blockinner[$block] as $childBlock) {
                $this->updateBlockvariablelist($childBlock);
            }
        }
        
    } // end func updateBlockvariablelist
    
    /**
    * Returns an array of blocknames where the given variable placeholder is used.
    *
    * @param    string    Variable placeholder
    * @return    array    $parents    parents[0..n] = blockname
    */
    function findPlaceholderBlocks($variable) {
        $parents = array();
        reset($this->blocklist);
        while (list($blockname, $content) = each($this->blocklist)) {
            reset($this->blockvariables[$blockname]);
            while (list($varname, $val) = each($this->blockvariables[$blockname])) {
                if ($variable == $varname) {
                    $parents[] = $blockname;
                }
            }
        }

        return $parents;
    } // end func findPlaceholderBlocks
    
    /**
    * Handles warnings, saves them to $warn and prints them or calls die() depending on the flags
    * @param    string    Warning
    * @param    string    File where the warning occured
    * @param    int       Linenumber where the warning occured
    * @see      $warn, $printWarning, $haltOnWarning
    */
    function warning($message, $file = '', $line = 0) {
        
        $message = sprintf('IntegratedTemplateExtension Warning: %s [File: %s, Line: %d]',
                                $message,
                                $file, 
                                $line );

        $this->warn[] = $message;
        
        if ($this->printWarning)
            print $message;
            
        if ($this->haltOnError) 
            die($message);
        
    } // end func warning
    
} // end class IntegratedTemplateExtension
?>