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- <?php
- //
- // +----------------------------------------------------------------------+
- // | PHP version 4.0 |
- // +----------------------------------------------------------------------+
- // | Copyright (c) 1997-2001 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: Ulf Wendel <ulf.wendel@phpdoc.de> |
- // +----------------------------------------------------------------------+
- //
- // $Id: IT.php,v 1.4 2001/02/08 22:19:59 chagenbu Exp $
- //
- /**
- * Integrated Template - IT
- *
- * Well there's not much to say about it. I needed a template class that
- * supports a single template file with multiple (nested) blocks inside and
- * a simple block API.
- *
- * The Isotemplate API is somewhat tricky for a beginner although it is the best
- * one you can build. template::parse() [phplib template = Isotemplate] requests
- * you to name a source and a target where the current block gets parsed into.
- * Source and target can be block names or even handler names. This API gives you
- * a maximum of fexibility but you always have to know what you do which is
- * quite unusual for php skripter like me.
- *
- * I noticed that I do not any control on which block gets parsed into which one.
- * If all blocks are within one file, the script knows how they are nested and in
- * which way you have to parse them. IT knows that inner1 is a child of block2, there's
- * no need to tell him about this.
- *
- * <table border>
- * <tr>
- * <td colspan=2>
- * __global__
- * <p>
- * (hidden and automatically added)
- * </td>
- * </tr>
- * <tr>
- * <td>block1</td>
- * <td>
- * <table border>
- * <tr>
- * <td colspan=2>block2</td>
- * </tr>
- * <tr>
- * <td>inner1</td>
- * <td>inner2</td>
- * </tr>
- * </table>
- * </td>
- * </tr>
- * </table>
- *
- * To add content to block1 you simply type:
- * <code>$tpl->setCurrentBlock("block1");</code>
- * and repeat this as often as needed:
- * <code>
- * $tpl->setVariable(...);
- * $tpl->parseCurrentBlock();
- * </code>
- *
- * To add content to block2 you would type something like:
- * <code>
- * $tpl->setCurrentBlock("inner1");
- * $tpl->setVariable(...);
- * $tpl->parseCurrentBlock();
- *
- * $tpl->setVariable(...);
- * $tpl->parseCurrentBlock();
- *
- * $tpl->parse("block1");
- * </code>
- *
- * This will result in one repition of block1 which contains two repitions
- * of inner1. inner2 will be removed if $removeEmptyBlock is set to true which is the default.
- *
- * Usage:
- * <code>
- * $tpl = new IntegratedTemplate( [string filerootdir] );
- *
- * // load a template or set it with setTemplate()
- * $tpl->loadTemplatefile( string filename [, boolean removeUnknownVariables, boolean removeEmptyBlocks] )
- *
- * // set "global" Variables meaning variables not beeing within a (inner) block
- * $tpl->setVariable( string variablename, mixed value );
- *
- * // like with the Isotemplates there's a second way to use setVariable()
- * $tpl->setVariable( array ( string varname => mixed value ) );
- *
- * // Let's use any block, even a deeply nested one
- * $tpl->setCurrentBlock( string blockname );
- *
- * // repeat this as often as you need it.
- * $tpl->setVariable( array ( string varname => mixed value ) );
- * $tpl->parseCurrentBlock();
- *
- * // get the parsed template or print it: $tpl->show()
- * $tpl->get();
- * </code>
- *
- * @author Ulf Wendel <uw@netuse.de>
- * @version $Id: IT.php,v 1.4 2001/02/08 22:19:59 chagenbu Exp $
- * @access public
- */
- class IntegratedTemplate {
-
- /**
- * Contains the error objects
- * @var array
- * @access public
- * @see halt(), $printError, $haltOnError
- */
- var $err = array();
-
- /**
- * Print error messages?
- * @var boolean
- * @access public
- * @see halt(), $haltOnError, $err
- */
- var $printError = false;
-
- /**
- * Call die() on error?
- * @var boolean
- * @access public
- * @see halt(), $printError, $err
- */
- var $haltOnError = false;
-
- /**
- * Clear cache on get()?
- * @var boolean
- */
- var $clearCache = false;
-
- /**
- * First character of a variable placeholder ( _{_VARIABLE} ).
- * @var string
- * @access public
- * @see $closingDelimiter, $blocknameRegExp, $variablenameRegExp
- */
- var $openingDelimiter = "{";
-
- /**
- * Last character of a variable placeholder ( {VARIABLE_}_ ).
- * @var string
- * @access public
- * @see $openingDelimiter, $blocknameRegExp, $variablenameRegExp
- */
- var $closingDelimiter = "}";
-
- /**
- * RegExp matching a block in the template.
- * Per default "sm" is used as the regexp modifier, "i" is missing.
- * That means a case sensitive search is done.
- * @var string
- * @access public
- * @see $variablenameRegExp, $openingDelimiter, $closingDelimiter
- */
- var $blocknameRegExp = "[0-9A-Za-z_-]+";
-
- /**
- * RegExp matching a variable placeholder in the template.
- * Per default "sm" is used as the regexp modifier, "i" is missing.
- * That means a case sensitive search is done.
- * @var string
- * @access public
- * @see $blocknameRegExp, $openingDelimiter, $closingDelimiter
- */
- var $variablenameRegExp = "[0-9A-Za-z_-]+";
-
- /**
- * RegExp used to find variable placeholder, filled by the constructor.
- * @var string Looks somewhat like @(delimiter varname delimiter)@
- * @access public
- * @see IntegratedTemplate()
- */
- var $variablesRegExp = "";
-
- /**
- * RegExp used to strip unused variable placeholder.
- * @brother $variablesRegExp
- */
- var $removeVariablesRegExp = "";
-
- /**
- * Controls the handling of unknown variables, default is remove.
- * @var boolean
- * @access public
- */
- var $removeUnknownVariables = true;
-
- /**
- * Controls the handling of empty blocks, default is remove.
- * @var boolean
- * @access public
- */
- var $removeEmptyBlocks = true;
-
- /**
- * RegExp used to find blocks an their content, filled by the constructor.
- * @var string
- * @see IntegratedTemplate()
- */
- var $blockRegExp = "";
-
- /**
- * Name of the current block.
- * @var string
- */
- var $currentBlock = "__global__";
-
- /**
- * Content of the template.
- * @var string
- */
- var $template = "";
-
- /**
- * Array of all blocks and their content.
- *
- * @var array
- * @see findBlocks()
- */
- var $blocklist = array();
-
- /**
- * Array with the parsed content of a block.
- *
- * @var array
- */
- var $blockdata = array();
-
- /**
- * Array of variables in a block.
- * @var array
- */
- var $blockvariables = array();
-
- /**
- * Array of inner blocks of a block.
- * @var array
- */
- var $blockinner = array();
-
- /**
- * List of blocks to preverse even if they are "empty".
- *
- * This is something special. Sometimes you have blocks that
- * should be preserved although they are empty (no placeholder replaced).
- * Think of a shopping basket. If it's empty you have to drop a message to
- * the user. If it's filled you have to show the contents of the shopping baseket.
- * Now where do you place the message that the basket is empty? It's no good
- * idea to place it in you applications as customers tend to like unecessary minor
- * text changes. Having another template file for an empty basket means that it's
- * very likely that one fine day the filled and empty basket templates have different
- * layout. I decided to introduce blocks that to not contain any placeholder but only
- * text such as the message "Your shopping basked is empty".
- *
- * Now if there is no replacement done in such a block the block will be recognized
- * as "empty" and by default ($removeEmptyBlocks = true) be stripped off. To avoid this
- * you can now call touchBlock() to avoid this.
- *
- * The array $touchedBlocks stores a list of touched block which must not be removed even
- * if they are empty.
- *
- * @var array $touchedBlocks
- * @see touchBlock(), $removeEmptyBlocks
- */
- var $touchedBlocks = array();
-
- /**
- * Variable cache.
- *
- * Variables get cached before any replacement is done.
- * Advantage: empty blocks can be removed automatically.
- * Disadvantage: might take some more memory
- *
- * @var array
- * @see setVariable(), $clearCacheOnParse
- */
- var $variableCache = array();
-
- /**
- * Clear the variable cache on parse?
- *
- * If you're not an expert just leave the default false.
- * True reduces memory consumption somewhat if you tend to
- * add lots of values for unknown placeholder.
- *
- * @var boolean
- */
- var $clearCacheOnParse = false;
-
- /**
- * Root directory for all file operations.
- * The string gets prefixed to all filenames given.
- * @var string
- * @see IntegratedTemplate(), setRoot()
- */
- var $fileRoot = "";
-
- /**
- * Internal flag indicating that a blockname was used multiple times.
- * @var boolean
- */
- var $flagBlocktrouble = false;
-
- /**
- * Flag indicating that the global block was parsed.
- * @var boolean
- */
- var $flagGlobalParsed = false;
-
- /**
- * EXPERIMENTAL! FIXME!
- * Flag indication that a template gets cached.
- *
- * Complex templates require some times to be preparsed
- * before the replacement can take place. Often I use
- * one template file over and over again but I don't know
- * before that I will use the same template file again.
- * Now IT could notice this and skip the preparse.
- *
- * @var boolean
- */
- var $flagCacheTemplatefile = true;
-
- /**
- * EXPERIMENTAL! FIXME!
- */
- var $lastTemplatefile = "";
-
- /**
- * Builds some complex regular expressions and optinally sets the file root directory.
- *
- * Make sure that you call this constructor if you derive your template
- * class from this one.
- *
- * @param string File root directory, prefix for all filenames given to the object.
- * @see setRoot()
- */
- function IntegratedTemplate($root = "") {
-
- $this->variablesRegExp = "@" . $this->openingDelimiter . "(" . $this->variablenameRegExp . ")" . $this->closingDelimiter . "@sm";
- $this->removeVariablesRegExp = "@" . $this->openingDelimiter . "\s*(" . $this->variablenameRegExp . ")\s*" . $this->closingDelimiter . "@sm";
-
- $this->blockRegExp = '@<!--\s+BEGIN\s+(' . $this->blocknameRegExp . ')\s+-->(.*)<!--\s+END\s+\1\s+-->@sm';
-
- $this->setRoot($root);
- } // end constructor
-
- /**
- * Print a certain block with all replacements done.
- * @brother get()
- */
- function show($block = "__global__") {
- print $this->get($block);
- } // end func show
-
- /**
- * Returns a block with all replacements done.
- *
- * @param string name of the block
- * @return string
- * @access public
- * @see show()
- */
- function get($block = "__global__") {
-
- if ("__global__" == $block && !$this->flagGlobalParsed)
- $this->parse("__global__");
-
- if (!isset($this->blocklist[$block])) {
- $this->halt("The block '$block' was not found in the template.", __FILE__, __LINE__);
- return true;
- }
-
- if ($this->clearCache) {
-
- $data = (isset($this->blockdata[$block])) ? $this->blockdata[$block] : "";
- unset($this->blockdata[$block]);
- return $data;
-
- } else {
-
- return (isset($this->blockdata[$block])) ? $this->blockdata[$block] : "";
-
- }
-
- } // end func get()
-
- /**
- * Parses the given block.
- *
- * @param string name of the block to be parsed
- * @access public
- * @see parseCurrentBlock()
- */
- function parse($block = "__global__", $flag_recursion = false) {
-
- if (!isset($this->blocklist[$block])) {
- $this->halt("The block '$block' was not found in the template.", __FILE__, __LINE__);
- return false;
- }
-
- if ("__global__" == $block)
- $this->flagGlobalParsed = true;
-
- $regs = array();
- $values = array();
-
- if ($this->clearCacheOnParse) {
-
- foreach ($this->variableCache as $name => $value) {
- $regs[] = "@" . $this->openingDelimiter . $name . $this->closingDelimiter . "@";
- $values[] = $value;
- }
- $this->variableCache = array();
-
- } else {
-
- foreach ($this->blockvariables[$block] as $allowedvar => $v) {
-
- if (isset($this->variableCache[$allowedvar])) {
- $regs[] = "@".$this->openingDelimiter . $allowedvar . $this->closingDelimiter . "@";
- $values[] = $this->variableCache[$allowedvar];
- unset($this->variableCache[$allowedvar]);
- }
-
- }
-
- }
-
- $outer = (0 == count($regs)) ? $this->blocklist[$block] : preg_replace($regs, $values, $this->blocklist[$block]);
- $empty = (0 == count($values)) ? true : false;
-
- if (isset($this->blockinner[$block])) {
-
- foreach ($this->blockinner[$block] as $k => $innerblock) {
-
- $this->parse($innerblock, true);
- if ("" != $this->blockdata[$innerblock])
- $empty = false;
-
- $placeholder = $this->openingDelimiter . "__" . $innerblock . "__" . $this->closingDelimiter;
- $outer = str_replace($placeholder, $this->blockdata[$innerblock], $outer);
- $this->blockdata[$innerblock] = "";
- }
-
- }
-
- if ($this->removeUnknownVariables)
- $outer = preg_replace($this->removeVariablesRegExp, "", $outer);
-
- if ($empty) {
-
- if (!$this->removeEmptyBlocks) {
-
- $this->blockdata[$block ].= $outer;
-
- } else {
-
- if (isset($this->touchedBlocks[$block]))
- $this->blockdata[$block] .= $outer;
-
- }
-
- } else {
-
- $this->blockdata[$block] .= $outer;
-
- }
-
- return $empty;
- } // end func parse
-
- /**
- * Parses the current block
- * @see parse(), setCurrentBlock(), $currentBlock
- * @access public
- */
- function parseCurrentBlock() {
- return $this->parse($this->currentBlock);
- } // end func parseCurrentBlock
-
- /**
- * Sets a variable value.
- *
- * The function can be used eighter like setVariable( "varname", "value")
- * or with one array $variables["varname"] = "value" given setVariable($variables)
- * quite like phplib templates set_var().
- *
- * @param mixed string with the variable name or an array %variables["varname"] = "value"
- * @param string value of the variable or empty if $variable is an array.
- * @param string prefix for variable names
- * @access public
- */
- function setVariable($variable, $value = "") {
-
- if (is_array($variable)) {
-
- $this->variableCache = array_merge($this->variableCache, $variable);
-
- } else {
-
- $this->variableCache[$variable] = $value;
-
- }
-
- } // end func setVariable
-
- /**
- * Sets the name of the current block that is the block where variables are added.
- *
- * @param string name of the block
- * @return boolean false on failure, otherwise true
- * @access public
- */
- function setCurrentBlock($block = "__global__") {
-
- if (!isset($this->blocklist[$block])) {
- $this->halt("Can't find the block '$block' in the template.", __FILE__, __LINE__);
- return false;
- }
-
- $this->currentBlock = $block;
-
- return true;
- } // end func setCurrentBlock
-
- /**
- * Preserves an empty block even if removeEmptyBlocks is true.
- *
- * @param string name of the block
- * @return boolean false on false, otherwise true
- * @access public
- * @see $removeEmptyBlocks
- */
- function touchBlock($block) {
-
- if (!isset($this->blocklist[$block])) {
- $this->halt("Can't find the block '$block' in the template.", __FILE__, __LINE__);
- return false;
- }
-
- $this->touchedBlocks[$block] = true;
-
- return true;
- } // end func touchBlock
-
- /**
- * Clears all datafields of the object and rebuild the internal blocklist
- *
- * LoadTemplatefile() and setTemplate() automatically call this function
- * when a new template is given. Don't use this function
- * unless you know what you're doing.
- *
- * @access public
- * @see free()
- */
- function init() {
-
- $this->free();
- $this->findBlocks($this->template);
- $this->buildBlockvariablelist();
-
- } // end func init
-
- /**
- * Clears all datafields of the object.
- *
- * Don't use this function unless you know what you're doing.
- *
- * @access public
- * @see init()
- */
- function free() {
-
- $this->err = array();
-
- $this->currentBlock = "__global__";
-
- $this->variableCache = array();
- $this->blocklookup = array();
- $this->touchedBlocks = array();
-
- $this->flagBlocktrouble = false;
- $this->flagGlobalParsed = false;
-
- } // end func free
-
- /**
- * Sets the template.
- *
- * You can eighter load a template file from disk with LoadTemplatefile() or set the
- * template manually using this function.
- *
- * @param string template content
- * @param boolean Unbekannte, nicht ersetzte Platzhalter entfernen?
- * @param boolean remove unknown/unused variables?
- * @param boolean remove empty blocks?
- * @see LoadTemplatefile(), $template
- * @access public
- */
- function setTemplate($template, $removeUnknownVariables = true, $removeEmptyBlocks = true) {
-
- $this->removeUnknownVariables = $removeUnknownVariables;
- $this->removeEmptyBlocks = $removeEmptyBlocks;
-
- if ("" == $template && $this->flagCacheTemplatefile) {
-
- $this->variableCache = array();
- $this->blockdata = array();
- $this->touchedBlocks = array();
- $this->currentBlock = "__global__";
-
- } else {
-
- $this->template = '<!-- BEGIN __global__ -->' . $template . '<!-- END __global__ -->';
- $this->init();
-
- }
-
- if ($this->flagBlocktrouble)
- return false;
-
- return true;
- } // end func setTemplate
-
- /**
- * Reads a template file from the disk.
- *
- * @param string name of the template file
- * @param bool How to handle unknown variables.
- * @param bool How to handle empty blocks.
- * @access public
- * @return boolean false on failure, otherwise true
- * @see $template, setTemplate(), $removeUnknownVariables, $removeEmptyBlocks
- */
- function loadTemplatefile($filename, $removeUnknownVariables = true, $removeEmptyBlocks = true) {
-
- $template = "";
- if (!$this->flagCacheTemplatefile || $this->lastTemplatefile != $filename)
- $template = $this->getfile($filename);
-
- $this->lastTemplatefile = $filename;
-
- return $this->setTemplate($template, $removeUnknownVariables, $removeEmptyBlocks, true);
- } // end func LoadTemplatefile
-
- /**
- * Sets the file root. The file root gets prefixed to all filenames passed to the object.
- *
- * Make sure that you override this function when using the class
- * on windows.
- *
- * @param string
- * @see IntegratedTemplate()
- * @access public
- */
- function setRoot($root) {
-
- if ("" != $root && "/" != substr($root, -1))
- $root .= "/";
-
- $this->fileRoot = $root;
-
- } // end func setRoot
-
- /**
- * Build a list of all variables within of a block
- */
- function buildBlockvariablelist() {
-
- foreach ($this->blocklist as $name => $content) {
- preg_match_all( $this->variablesRegExp, $content, $regs );
-
- if (0 != count($regs[1])) {
-
- foreach ($regs[1] as $k => $var)
- $this->blockvariables[$name][$var] = true;
-
- } else {
-
- $this->blockvariables[$name] = array();
-
- }
-
- }
-
- } // end func buildBlockvariablelist
-
- /**
- * Returns a list of all
- */
- function getGlobalvariables() {
-
- $regs = array();
- $values = array();
-
- foreach ($this->blockvariables["__global__"] as $allowedvar => $v) {
-
- if (isset($this->variableCache[$allowedvar])) {
- $regs[] = "@" . $this->openingDelimiter . $allowedvar . $this->closingDelimiter."@";
- $values[] = $this->variableCache[$allowedvar];
- unset($this->variableCache[$allowedvar]);
- }
-
- }
-
- return array($regs, $values);
- } // end func getGlobalvariables
-
- /**
- * Recusively builds a list of all blocks within the template.
- *
- * @param string string that gets scanned
- * @access private
- * @see $blocklist
- */
- function findBlocks($string) {
-
- $blocklist = array();
-
- if (preg_match_all($this->blockRegExp, $string, $regs, PREG_SET_ORDER)) {
-
- foreach ($regs as $k => $match) {
-
- $blockname = $match[1];
- $blockcontent = $match[2];
-
- if (isset($this->blocklist[$blockname])) {
- $this->halt("The name of a block must be unique within a template. Found '$blockname' twice. Unpredictable results may appear.", __FILE__, __LINE__);
- $this->flagBlocktrouble = true;
- }
-
- $this->blocklist[$blockname] = $blockcontent;
- $this->blockdata[$blockname] = "";
-
- $blocklist[] = $blockname;
-
- $inner = $this->findBlocks($blockcontent);
- foreach ($inner as $k => $name) {
-
- $pattern = sprintf('@<!--\s+BEGIN\s+%s\s+-->(.*)<!--\s+END\s+%s\s+-->@sm',
- $name,
- $name
- );
-
- $this->blocklist[$blockname] = preg_replace( $pattern,
- $this->openingDelimiter . "__" . $name . "__" . $this->closingDelimiter,
- $this->blocklist[$blockname]
- );
- $this->blockinner[$blockname][] = $name;
- $this->blockparents[$name] = $blockname;
-
- }
-
- }
-
- }
-
- return $blocklist;
- } // end func findBlocks
-
- /**
- * Reads a file from disk and returns its content.
- * @param string Filename
- * @return string Filecontent
- */
- function getFile($filename) {
-
- if ("/" == $filename{0} && "/" == substr($this->fileRoot, -1))
- $filename = substr($filename, 1);
-
- $filename = $this->fileRoot . $filename;
-
- if (!($fh = @fopen($filename, "r"))) {
- $this->halt("Can't read '$filename'.", __FILE__, __LINE__);
- return "";
- }
-
- $content = fread($fh, filesize($filename));
- fclose($fh);
-
- return $content;
- } // end func getFile
-
- /**
- * Error Handling function.
- * @param string error message
- * @param mixed File where the error occured
- * @param int Line where the error occured
- * @see $err
- */
- function halt($message, $file = "", $line = 0) {
-
-
- $message = sprintf("IntegratedTemplate Error: %s [File: %s, Line: %d]",
- $message,
- $file,
- $line
- );
-
- $this->err[] = $message;
-
- if ($this->printError)
- print $message;
-
- if ($this->haltOnError)
- die($message);
-
- } // end func halt
-
- } // end class IntegratedTemplate
- ?>
-