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<?php
// vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4:
/**
* Parse structured wiki text and render into arbitrary formats such as XHTML.
*
* PHP versions 4 and 5
*
* @category Text
* @package Text_Wiki
* @author Paul M. Jones <pmjones@php.net>
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version CVS: $Id: Wiki.php,v 1.44 2006/03/02 04:04:59 justinpatrin Exp $
* @link http://pear.php.net/package/Text_Wiki
*/
/**
* The baseline abstract parser class.
*/
require_once 'Text/Wiki/Parse.php';
/**
* The baseline abstract render class.
*/
require_once 'Text/Wiki/Render.php';
/**
* Parse structured wiki text and render into arbitrary formats such as XHTML.
*
* This is the "master" class for handling the management and convenience
* functions to transform Wiki-formatted text.
*
* @category Text
* @package Text_Wiki
* @author Paul M. Jones <pmjones@php.net>
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version Release: 1.1.0
* @link http://pear.php.net/package/Text_Wiki
*/
class Text_Wiki {
/**
*
* The default list of rules, in order, to apply to the source text.
*
* @access public
*
* @var array
*
*/
var $rules = array(
'Prefilter',
'Delimiter',
'Code',
'Function',
'Html',
'Raw',
'Include',
'Embed',
'Anchor',
'Heading',
'Toc',
'Horiz',
'Break',
'Blockquote',
'List',
'Deflist',
'Table',
'Image',
'Phplookup',
'Center',
'Newline',
'Paragraph',
'Url',
'Freelink',
'Interwiki',
'Wikilink',
'Colortext',
'Strong',
'Bold',
'Emphasis',
'Italic',
'Underline',
'Tt',
'Superscript',
'Subscript',
'Revise',
'Tighten'
);
/**
*
* The list of rules to not-apply to the source text.
*
* @access public
*
* @var array
*
*/
var $disable = array(
'Html',
'Include',
'Embed'
);
/**
*
* Custom configuration for rules at the parsing stage.
*
* In this array, the key is the parsing rule name, and the value is
* an array of key-value configuration pairs corresponding to the $conf
* property in the target parsing rule.
*
* For example:
*
* <code>
* $parseConf = array(
* 'Include' => array(
* 'base' => '/path/to/scripts/'
* )
* );
* </code>
*
* Note that most default rules do not need any parsing configuration.
*
* @access public
*
* @var array
*
*/
var $parseConf = array();
/**
*
* Custom configuration for rules at the rendering stage.
*
* Because rendering may be different for each target format, the
* first-level element in this array is always a format name (e.g.,
* 'Xhtml').
*
* Within that first level element, the subsequent elements match the
* $parseConf format. That is, the sub-key is the rendering rule name,
* and the sub-value is an array of key-value configuration pairs
* corresponding to the $conf property in the target rendering rule.
*
* @access public
*
* @var array
*
*/
var $renderConf = array(
'Docbook' => array(),
'Latex' => array(),
'Pdf' => array(),
'Plain' => array(),
'Rtf' => array(),
'Xhtml' => array()
);
/**
*
* Custom configuration for the output format itself.
*
* Even though Text_Wiki will render the tokens from parsed text,
* the format itself may require some configuration. For example,
* RTF needs to know font names and sizes, PDF requires page layout
* information, and DocBook needs a section hierarchy. This array
* matches the $conf property of the the format-level renderer
* (e.g., Text_Wiki_Render_Xhtml).
*
* In this array, the key is the rendering format name, and the value is
* an array of key-value configuration pairs corresponding to the $conf
* property in the rendering format rule.
*
* @access public
*
* @var array
*
*/
var $formatConf = array(
'Docbook' => array(),
'Latex' => array(),
'Pdf' => array(),
'Plain' => array(),
'Rtf' => array(),
'Xhtml' => array()
);
/**
*
* The delimiter for token numbers of parsed elements in source text.
*
* @access public
*
* @var string
*
*/
var $delim = "\xFF";
/**
*
* The tokens generated by rules as the source text is parsed.
*
* As Text_Wiki applies rule classes to the source text, it will
* replace portions of the text with a delimited token number. This
* is the array of those tokens, representing the replaced text and
* any options set by the parser for that replaced text.
*
* The tokens array is sequential; each element is itself a sequential
* array where element 0 is the name of the rule that generated the
* token, and element 1 is an associative array where the key is an
* option name and the value is an option value.
*
* @access private
*
* @var array
*
*/
var $tokens = array();
/**
* How many tokens generated pro rules.
*
* Intended to load only necessary render objects
*
* @access private
* @var array
*/
var $_countRulesTokens = array();
/**
*
* The source text to which rules will be applied.
*
* This text will be transformed in-place, which means that it will
* change as the rules are applied.
*
* @access private
*
* @var string
*
*/
var $source = '';
/**
*
* Array of rule parsers.
*
* Text_Wiki creates one instance of every rule that is applied to
* the source text; this array holds those instances. The array key
* is the rule name, and the array value is an instance of the rule
* class.
*
* @access private
*
* @var array
*
*/
var $parseObj = array();
/**
*
* Array of rule renderers.
*
* Text_Wiki creates one instance of every rule that is applied to
* the source text; this array holds those instances. The array key
* is the rule name, and the array value is an instance of the rule
* class.
*
* @access private
*
* @var array
*
*/
var $renderObj = array();
/**
*
* Array of format renderers.
*
* @access private
*
* @var array
*
*/
var $formatObj = array();
/**
*
* Array of paths to search, in order, for parsing and rendering rules.
*
* @access private
*
* @var array
*
*/
var $path = array(
'parse' => array(),
'render' => array()
);
/**
*
* The directory separator character.
*
* @access private
*
* @var string
*
*/
var $_dirSep = DIRECTORY_SEPARATOR;
/**
*
* Constructor.
*
* **DEPRECATED**
* Please use the singleton() or factory() methods.
*
* @access public
*
* @param array $rules The set of rules to load for this object. Defaults
* to null, which will load the default ruleset for this parser.
*/
function Text_Wiki($rules = null)
{
if (is_array($rules)) {
$this->rules = $rules;
}
$this->addPath(
'parse',
$this->fixPath(dirname(__FILE__)) . 'Wiki/Parse/Default/'
);
$this->addPath(
'render',
$this->fixPath(dirname(__FILE__)) . 'Wiki/Render/'
);
}
/**
* Singleton.
*
* This avoids instantiating multiple Text_Wiki instances where a number
* of objects are required in one call, e.g. to save memory in a
* CMS invironment where several parsers are required in a single page.
*
* $single = & singleton();
*
* or
*
* $single = & singleton('Parser', array('Prefilter', 'Delimiter', 'Code', 'Function',
* 'Html', 'Raw', 'Include', 'Embed', 'Anchor', 'Heading', 'Toc', 'Horiz',
* 'Break', 'Blockquote', 'List', 'Deflist', 'Table', 'Image', 'Phplookup',
* 'Center', 'Newline', 'Paragraph', 'Url', 'Freelink', 'Interwiki', 'Wikilink',
* 'Colortext', 'Strong', 'Bold', 'Emphasis', 'Italic', 'Underline', 'Tt',
* 'Superscript', 'Subscript', 'Revise', 'Tighten'));
*
* Call using a subset of this list. The order of passing rulesets in the
* $rules array is important!
*
* After calling this, call $single->setParseConf(), setRenderConf() or setFormatConf()
* as usual for a constructed object of this class.
*
* The internal static array of singleton objects has no index on the parser
* rules, the only index is on the parser name. So if you call this multiple
* times with different rules but the same parser name, you will get the same
* static parser object each time.
*
* @access public
* @static
* @since Method available since Release 1.1.0
* @param string $parser The parser to be used (defaults to 'Default').
* @param array $rules The set of rules to instantiate the object. This
* will only be used when the first call to singleton is made, if included
* in further calls it will be effectively ignored.
* @return &object a reference to the Text_Wiki unique instantiation.
*/
function &singleton($parser = 'Default', $rules = null)
{
static $only = array();
if (!isset($only[$parser])) {
$ret =& Text_Wiki::factory($parser, $rules);
if (PEAR::isError($ret)) {
return $ret;
}
$only[$parser] =& $ret;
}
return $only[$parser];
}
/**
* Returns a Text_Wiki Parser class for the specified parser.
*
* @access public
* @static
* @param string $parser The name of the parse to instantiate
* @param array $rules The rules to pass into the constructor
* {@see Text_Wiki::singleton} for a list of rules
* @return Text_Wiki a Parser object extended from Text_Wiki
*/
function &factory($parser = 'Default', $rules = null)
{
$class = 'Text_Wiki_' . $parser;
$file = str_replace('_', '/', $class).'.php';
if (!class_exists($class)) {
/*$exists = false;
foreach (split(PATH_SEPARATOR, get_include_path()) as $path) {
if (file_exists($path.'/'.$file)
&& is_readable($path.'/'.$file)) {
$exists = true;
break;
}
}*/
$fp = @fopen($file, 'r', true);
if ($fp === false) {
return PEAR::raiseError('Could not find file '.$file.' in include_path');
}
fclose($fp);
include_once($file);
if (!class_exists($class)) {
return PEAR::raiseError('Class '.$class.' does not exist after including '.$file);
}
}
$obj =& new $class($rules);
return $obj;
}
/**
*
* Set parser configuration for a specific rule and key.
*
* @access public
*
* @param string $rule The parse rule to set config for.
*
* @param array|string $arg1 The full config array to use for the
* parse rule, or a conf key in that array.
*
* @param string $arg2 The config value for the key.
*
* @return void
*
*/
function setParseConf($rule, $arg1, $arg2 = null)
{
$rule = ucwords(strtolower($rule));
if (! isset($this->parseConf[$rule])) {
$this->parseConf[$rule] = array();
}
// if first arg is an array, use it as the entire
// conf array for the rule. otherwise, treat arg1
// as a key and arg2 as a value for the rule conf.
if (is_array($arg1)) {
$this->parseConf[$rule] = $arg1;
} else {
$this->parseConf[$rule][$arg1] = $arg2;
}
}
/**
*
* Get parser configuration for a specific rule and key.
*
* @access public
*
* @param string $rule The parse rule to get config for.
*
* @param string $key A key in the conf array; if null,
* returns the entire conf array.
*
* @return mixed The whole conf array if no key is specified,
* or the specific conf key value.
*
*/
function getParseConf($rule, $key = null)
{
$rule = ucwords(strtolower($rule));
// the rule does not exist
if (! isset($this->parseConf[$rule])) {
return null;
}
// no key requested, return the whole array
if (is_null($key)) {
return $this->parseConf[$rule];
}
// does the requested key exist?
if (isset($this->parseConf[$rule][$key])) {
// yes, return that value
return $this->parseConf[$rule][$key];
} else {
// no
return null;
}
}
/**
*
* Set renderer configuration for a specific format, rule, and key.
*
* @access public
*
* @param string $format The render format to set config for.
*
* @param string $rule The render rule to set config for in the format.
*
* @param array|string $arg1 The config array, or the config key
* within the render rule.
*
* @param string $arg2 The config value for the key.
*
* @return void
*
*/
function setRenderConf($format, $rule, $arg1, $arg2 = null)
{
$format = ucwords(strtolower($format));
$rule = ucwords(strtolower($rule));
if (! isset($this->renderConf[$format])) {
$this->renderConf[$format] = array();
}
if (! isset($this->renderConf[$format][$rule])) {
$this->renderConf[$format][$rule] = array();
}
// if first arg is an array, use it as the entire
// conf array for the render rule. otherwise, treat arg1
// as a key and arg2 as a value for the render rule conf.
if (is_array($arg1)) {
$this->renderConf[$format][$rule] = $arg1;
} else {
$this->renderConf[$format][$rule][$arg1] = $arg2;
}
}
/**
*
* Get renderer configuration for a specific format, rule, and key.
*
* @access public
*
* @param string $format The render format to get config for.
*
* @param string $rule The render format rule to get config for.
*
* @param string $key A key in the conf array; if null,
* returns the entire conf array.
*
* @return mixed The whole conf array if no key is specified,
* or the specific conf key value.
*
*/
function getRenderConf($format, $rule, $key = null)
{
$format = ucwords(strtolower($format));
$rule = ucwords(strtolower($rule));
if (! isset($this->renderConf[$format]) ||
! isset($this->renderConf[$format][$rule])) {
return null;
}
// no key requested, return the whole array
if (is_null($key)) {
return $this->renderConf[$format][$rule];
}
// does the requested key exist?
if (isset($this->renderConf[$format][$rule][$key])) {
// yes, return that value
return $this->renderConf[$format][$rule][$key];
} else {
// no
return null;
}
}
/**
*
* Set format configuration for a specific rule and key.
*
* @access public
*
* @param string $format The format to set config for.
*
* @param string $key The config key within the format.
*
* @param string $val The config value for the key.
*
* @return void
*
*/
function setFormatConf($format, $arg1, $arg2 = null)
{
if (! is_array($this->formatConf[$format])) {
$this->formatConf[$format] = array();
}
// if first arg is an array, use it as the entire
// conf array for the format. otherwise, treat arg1
// as a key and arg2 as a value for the format conf.
if (is_array($arg1)) {
$this->formatConf[$format] = $arg1;
} else {
$this->formatConf[$format][$arg1] = $arg2;
}
}
/**
*
* Get configuration for a specific format and key.
*
* @access public
*
* @param string $format The format to get config for.
*
* @param mixed $key A key in the conf array; if null,
* returns the entire conf array.
*
* @return mixed The whole conf array if no key is specified,
* or the specific conf key value.
*
*/
function getFormatConf($format, $key = null)
{
// the format does not exist
if (! isset($this->formatConf[$format])) {
return null;
}
// no key requested, return the whole array
if (is_null($key)) {
return $this->formatConf[$format];
}
// does the requested key exist?
if (isset($this->formatConf[$format][$key])) {
// yes, return that value
return $this->formatConf[$format][$key];
} else {
// no
return null;
}
}
/**
*
* Inserts a rule into to the rule set.
*
* @access public
*
* @param string $name The name of the rule. Should be different from
* all other keys in the rule set.
*
* @param string $tgt The rule after which to insert this new rule. By
* default (null) the rule is inserted at the end; if set to '', inserts
* at the beginning.
*
* @return void
*
*/
function insertRule($name, $tgt = null)
{
$name = ucwords(strtolower($name));
if (! is_null($tgt)) {
$tgt = ucwords(strtolower($tgt));
}
// does the rule name to be inserted already exist?
if (in_array($name, $this->rules)) {
// yes, return
return null;
}
// the target name is not null, and not '', but does not exist
// in the list of rules. this means we're trying to insert after
// a target key, but the target key isn't there.
if (! is_null($tgt) && $tgt != '' &&
! in_array($tgt, $this->rules)) {
return false;
}
// if $tgt is null, insert at the end. We know this is at the
// end (instead of resetting an existing rule) becuase we exited
// at the top of this method if the rule was already in place.
if (is_null($tgt)) {
$this->rules[] = $name;
return true;
}
// save a copy of the current rules, then reset the rule set
// so we can insert in the proper place later.
// where to insert the rule?
if ($tgt == '') {
// insert at the beginning
array_unshift($this->rules, $name);
return true;
}
// insert after the named rule
$tmp = $this->rules;
$this->rules = array();
foreach ($tmp as $val) {
$this->rules[] = $val;
if ($val == $tgt) {
$this->rules[] = $name;
}
}
return true;
}
/**
*
* Delete (remove or unset) a rule from the $rules property.
*
* @access public
*
* @param string $rule The name of the rule to remove.
*
* @return void
*
*/
function deleteRule($name)
{
$name = ucwords(strtolower($name));
$key = array_search($name, $this->rules);
if ($key !== false) {
unset($this->rules[$key]);
}
}
/**
*
* Change from one rule to another in-place.
*
* @access public
*
* @param string $old The name of the rule to change from.
*
* @param string $new The name of the rule to change to.
*
* @return void
*
*/
function changeRule($old, $new)
{
$old = ucwords(strtolower($old));
$new = ucwords(strtolower($new));
$key = array_search($old, $this->rules);
if ($key !== false) {
// delete the new name , case it was already there
$this->deleteRule($new);
$this->rules[$key] = $new;
}
}
/**
*
* Enables a rule so that it is applied when parsing.
*
* @access public
*
* @param string $rule The name of the rule to enable.
*
* @return void
*
*/
function enableRule($name)
{
$name = ucwords(strtolower($name));
$key = array_search($name, $this->disable);
if ($key !== false) {
unset($this->disable[$key]);
}
}
/**
*
* Disables a rule so that it is not applied when parsing.
*
* @access public
*
* @param string $rule The name of the rule to disable.
*
* @return void
*
*/
function disableRule($name)
{
$name = ucwords(strtolower($name));
$key = array_search($name, $this->disable);
if ($key === false) {
$this->disable[] = $name;
}
}
/**
*
* Parses and renders the text passed to it, and returns the results.
*
* First, the method parses the source text, applying rules to the
* text as it goes. These rules will modify the source text
* in-place, replacing some text with delimited tokens (and
* populating the $this->tokens array as it goes).
*
* Next, the method renders the in-place tokens into the requested
* output format.
*
* Finally, the method returns the transformed text. Note that the
* source text is transformed in place; once it is transformed, it is
* no longer the same as the original source text.
*
* @access public
*
* @param string $text The source text to which wiki rules should be
* applied, both for parsing and for rendering.
*
* @param string $format The target output format, typically 'xhtml'.
* If a rule does not support a given format, the output from that
* rule is rule-specific.
*
* @return string The transformed wiki text.
*
*/
function transform($text, $format = 'Xhtml')
{
$this->parse($text);
return $this->render($format);
}
/**
*
* Sets the $_source text property, then parses it in place and
* retains tokens in the $_tokens array property.
*
* @access public
*
* @param string $text The source text to which wiki rules should be
* applied, both for parsing and for rendering.
*
* @return void
*
*/
function parse($text)
{
// set the object property for the source text
$this->source = $text;
// reset the tokens.
$this->tokens = array();
$this->_countRulesTokens = array();
// apply the parse() method of each requested rule to the source
// text.
foreach ($this->rules as $name) {
// do not parse the rules listed in $disable
if (! in_array($name, $this->disable)) {
// load the parsing object
$this->loadParseObj($name);
// load may have failed; only parse if
// an object is in the array now
if (is_object($this->parseObj[$name])) {
$this->parseObj[$name]->parse();
}
}
}
}
/**
*
* Renders tokens back into the source text, based on the requested format.
*
* @access public
*
* @param string $format The target output format, typically 'xhtml'.
* If a rule does not support a given format, the output from that
* rule is rule-specific.
*
* @return string The transformed wiki text.
*
*/
function render($format = 'Xhtml')
{
// the rendering method we're going to use from each rule
$format = ucwords(strtolower($format));
// the eventual output text
$output = '';
// when passing through the parsed source text, keep track of when
// we are in a delimited section
$in_delim = false;
// when in a delimited section, capture the token key number
$key = '';
// load the format object, or crap out if we can't find it
$result = $this->loadFormatObj($format);
if ($this->isError($result)) {
return $result;
}
// pre-rendering activity
if (is_object($this->formatObj[$format])) {
$output .= $this->formatObj[$format]->pre();
}
// load the render objects
foreach (array_keys($this->_countRulesTokens) as $rule) {
$this->loadRenderObj($format, $rule);
}
// pass through the parsed source text character by character
$k = strlen($this->source);
for ($i = 0; $i < $k; $i++) {
// the current character
$char = $this->source{$i};
// are alredy in a delimited section?
if ($in_delim) {
// yes; are we ending the section?
if ($char == $this->delim) {
// yes, get the replacement text for the delimited
// token number and unset the flag.
$key = (int)$key;
$rule = $this->tokens[$key][0];
$opts = $this->tokens[$key][1];
$output .= $this->renderObj[$rule]->token($opts);
$in_delim = false;
} else {
// no, add to the dlimited token key number
$key .= $char;
}
} else {
// not currently in a delimited section.
// are we starting into a delimited section?
if ($char == $this->delim) {
// yes, reset the previous key and
// set the flag.
$key = '';
$in_delim = true;
} else {
// no, add to the output as-is
$output .= $char;
}
}
}
// post-rendering activity
if (is_object($this->formatObj[$format])) {
$output .= $this->formatObj[$format]->post();
}
// return the rendered source text.
return $output;
}
/**
*
* Returns the parsed source text with delimited token placeholders.
*
* @access public
*
* @return string The parsed source text.
*
*/
function getSource()
{
return $this->source;
}
/**
*
* Returns tokens that have been parsed out of the source text.
*
* @access public
*
* @param array $rules If an array of rule names is passed, only return
* tokens matching these rule names. If no array is passed, return all
* tokens.
*
* @return array An array of tokens.
*
*/
function getTokens($rules = null)
{
if (is_null($rules)) {
return $this->tokens;
} else {
settype($rules, 'array');
$result = array();
foreach ($this->tokens as $key => $val) {
if (in_array($val[0], $rules)) {
$result[$key] = $val;
}
}
return $result;
}
}
/**
*
* Add a token to the Text_Wiki tokens array, and return a delimited
* token number.
*
* @access public
*
* @param array $options An associative array of options for the new
* token array element. The keys and values are specific to the
* rule, and may or may not be common to other rule options. Typical
* options keys are 'text' and 'type' but may include others.
*
* @param boolean $id_only If true, return only the token number, not
* a delimited token string.
*
* @return string|int By default, return the number of the
* newly-created token array element with a delimiter prefix and
* suffix; however, if $id_only is set to true, return only the token
* number (no delimiters).
*
*/
function addToken($rule, $options = array(), $id_only = false)
{
// increment the token ID number. note that if you parse
// multiple times with the same Text_Wiki object, the ID number
// will not reset to zero.
static $id;
if (! isset($id)) {
$id = 0;
} else {
$id ++;
}
// force the options to be an array
settype($options, 'array');
// add the token
$this->tokens[$id] = array(
0 => $rule,
1 => $options
);
if (!isset($this->_countRulesTokens[$rule])) {
$this->_countRulesTokens[$rule] = 1;
} else {
++$this->_countRulesTokens[$rule];
}
// return a value
if ($id_only) {
// return the last token number
return $id;
} else {
// return the token number with delimiters
return $this->delim . $id . $this->delim;
}
}
/**
*
* Set or re-set a token with specific information, overwriting any
* previous rule name and rule options.
*
* @access public
*
* @param int $id The token number to reset.
*
* @param int $rule The rule name to use.
*
* @param array $options An associative array of options for the
* token array element. The keys and values are specific to the
* rule, and may or may not be common to other rule options. Typical
* options keys are 'text' and 'type' but may include others.
*
* @return void
*
*/
function setToken($id, $rule, $options = array())
{
$oldRule = $this->tokens[$id][0];
// reset the token
$this->tokens[$id] = array(
0 => $rule,
1 => $options
);
if ($rule != $oldRule) {
if (!($this->_countRulesTokens[$oldRule]--)) {
unset($this->_countRulesTokens[$oldRule]);
}
if (!isset($this->_countRulesTokens[$rule])) {
$this->_countRulesTokens[$rule] = 1;
} else {
++$this->_countRulesTokens[$rule];
}
}
}
/**
*
* Load a rule parser class file.
*
* @access public
*
* @return bool True if loaded, false if not.
*
*/
function loadParseObj($rule)
{
$rule = ucwords(strtolower($rule));
$file = $rule . '.php';
$class = "Text_Wiki_Parse_$rule";
if (! class_exists($class)) {
$loc = $this->findFile('parse', $file);
if ($loc) {
// found the class
include_once $loc;
} else {
// can't find the class
$this->parseObj[$rule] = null;
// can't find the class
return $this->error(
"Parse rule '$rule' not found"
);
}
}
$this->parseObj[$rule] =& new $class($this);
}
/**
*
* Load a rule-render class file.
*
* @access public
*
* @return bool True if loaded, false if not.
*
*/
function loadRenderObj($format, $rule)
{
$format = ucwords(strtolower($format));
$rule = ucwords(strtolower($rule));
$file = "$format/$rule.php";
$class = "Text_Wiki_Render_$format" . "_$rule";
if (! class_exists($class)) {
// load the class
$loc = $this->findFile('render', $file);
if ($loc) {
// found the class
include_once $loc;
} else {
// can't find the class
return $this->error(
"Render rule '$rule' in format '$format' not found"
);
}
}
$this->renderObj[$rule] =& new $class($this);
}
/**
*
* Load a format-render class file.
*
* @access public
*
* @return bool True if loaded, false if not.
*
*/
function loadFormatObj($format)
{
$format = ucwords(strtolower($format));
$file = $format . '.php';
$class = "Text_Wiki_Render_$format";
if (! class_exists($class)) {
$loc = $this->findFile('render', $file);
if ($loc) {
// found the class
include_once $loc;
} else {
// can't find the class
return $this->error(
"Rendering format class '$class' not found"
);
}
}
$this->formatObj[$format] =& new $class($this);
}
/**
*
* Add a path to a path array.
*
* @access public
*
* @param string $type The path-type to add (parse or render).
*
* @param string $dir The directory to add to the path-type.
*
* @return void
*
*/
function addPath($type, $dir)
{
$dir = $this->fixPath($dir);
if (! isset($this->path[$type])) {
$this->path[$type] = array($dir);
} else {
array_unshift($this->path[$type], $dir);
}
}
/**
*
* Get the current path array for a path-type.
*
* @access public
*
* @param string $type The path-type to look up (plugin, filter, or
* template). If not set, returns all path types.
*
* @return array The array of paths for the requested type.
*
*/
function getPath($type = null)
{
if (is_null($type)) {
return $this->path;
} elseif (! isset($this->path[$type])) {
return array();
} else {
return $this->path[$type];
}
}
/**
*
* Searches a series of paths for a given file.
*
* @param array $type The type of paths to search (template, plugin,
* or filter).
*
* @param string $file The file name to look for.
*
* @return string|bool The full path and file name for the target file,
* or boolean false if the file is not found in any of the paths.
*
*/
function findFile($type, $file)
{
// get the set of paths
$set = $this->getPath($type);
// start looping through them
foreach ($set as $path) {
$fullname = $path . $file;
if (file_exists($fullname) && is_readable($fullname)) {
return $fullname;
}
}
// could not find the file in the set of paths
return false;
}
/**
*
* Append a trailing '/' to paths, unless the path is empty.
*
* @access private
*
* @param string $path The file path to fix
*
* @return string The fixed file path
*
*/
function fixPath($path)
{
$len = strlen($this->_dirSep);
if (! empty($path) &&
substr($path, -1 * $len, $len) != $this->_dirSep) {
return $path . $this->_dirSep;
} else {
return $path;
}
}
/**
*
* Simple error-object generator.
*
* @access public
*
* @param string $message The error message.
*
* @return object PEAR_Error
*
*/
function &error($message)
{
if (! class_exists('PEAR_Error')) {
include_once 'PEAR.php';
}
return PEAR::throwError($message);
}
/**
*
* Simple error checker.
*
* @access public
*
* @param mixed $obj Check if this is a PEAR_Error object or not.
*
* @return bool True if a PEAR_Error, false if not.
*
*/
function isError(&$obj)
{
return is_a($obj, 'PEAR_Error');
}
}
?>
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