geshi.php

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    /**
     * Line number styles for fancy lines
     * @var string
     */
    var $line_style2 = 'font-weight: bold;';

    /**
     * Flag for how line nubmers are displayed
     * @var boolean
     */
    var $line_numbers = GESHI_NO_LINE_NUMBERS;

    /**
     * The "nth" value for fancy line highlighting
     * @var int
     */
    var $line_nth_row = 0;

    /**
     * The size of tab stops
     * @var int
     */
    var $tab_width = 8;

    /**
     * Default target for keyword links
     * @var string
     */
    var $link_target = '';

    /**
     * The encoding to use for entity encoding
     * NOTE: no longer used
     * @var string
     */
    var $encoding = 'utf-8';

    /**
     * Should keywords be linked?
     * @var boolean
     */
    var $keyword_links = true;

    /**#@-*/

    /**
     * Creates a new GeSHi object, with source and language
     *
     * @param string The source code to highlight
     * @param string The language to highlight the source with
     * @param string The path to the language file directory. <b>This
     *               is deprecated!</b> I've backported the auto path
     *               detection from the 1.1.X dev branch, so now it
     *               should be automatically set correctly. If you have
     *               renamed the language directory however, you will
     *               still need to set the path using this parameter or
     *               {@link GeSHi::set_language_path()}
     * @since 1.0.0
     */
    function GeSHi($source, $language, $path = '') {
        $this->set_source($source);
        $this->set_language_path($path);
        $this->set_language($language);
    }

    /**
     * Returns an error message associated with the last GeSHi operation,
     * or false if no error has occured
     *
     * @return string|false An error message if there has been an error, else false
     * @since  1.0.0
     */
    function error() {
        if ($this->error) {
            $msg = $this->error_messages[$this->error];
            $debug_tpl_vars = array(
                '{LANGUAGE}' => $this->language,
                '{PATH}' => $this->language_path
            );
            foreach ($debug_tpl_vars as $tpl => $var) {
                $msg = str_replace($tpl, $var, $msg);
            }
            return "<br /><strong>GeSHi Error:</strong> $msg (code $this->error)<br />";
        }
        return false;
    }

    /**
     * Gets a human-readable language name (thanks to Simon Patterson
     * for the idea :))
     *
     * @return string The name for the current language
     * @since  1.0.2
     */
    function get_language_name() {
        if (GESHI_ERROR_NO_SUCH_LANG == $this->error) {
            return $this->language_data['LANG_NAME'] . ' (Unknown Language)';
        }
        return $this->language_data['LANG_NAME'];
    }

    /**
     * Sets the source code for this object
     *
     * @param string The source code to highlight
     * @since 1.0.0
     */
    function set_source($source) {
        $this->source = $source;
        $this->highlight_extra_lines = array();
    }

    /**
     * Sets the language for this object
     *
     * @param string The name of the language to use
     * @since 1.0.0
     */
    function set_language($language) {
        $this->error = false;
        $this->strict_mode = GESHI_NEVER;

        $language = preg_replace('#[^a-zA-Z0-9\-_]#', '', $language);
        $this->language = strtolower($language);

        $file_name = $this->language_path . $this->language . '.php';
        if (!is_readable($file_name)) {
            $this->error = GESHI_ERROR_NO_SUCH_LANG;
            return;
        }
        // Load the language for parsing
        $this->load_language($file_name);
    }

    /**
     * Sets the path to the directory containing the language files. Note
     * that this path is relative to the directory of the script that included
     * geshi.php, NOT geshi.php itself.
     *
     * @param string The path to the language directory
     * @since 1.0.0
     * @deprecated The path to the language files should now be automatically
     *             detected, so this method should no longer be needed. The
     *             1.1.X branch handles manual setting of the path differently
     *             so this method will disappear in 1.2.0.
     */
    function set_language_path($path) {
        if ($path) {
            $this->language_path = ('/' == substr($path, strlen($path) - 1, 1)) ? $path : $path . '/';
            $this->set_language($this->language);        // otherwise set_language_path has no effect
        }
    }

    /**
     * Sets the type of header to be used.
     *
     * If GESHI_HEADER_DIV is used, the code is surrounded in a "div".This
     * means more source code but more control over tab width and line-wrapping.
     * GESHI_HEADER_PRE means that a "pre" is used - less source, but less
     * control. Default is GESHI_HEADER_PRE.
     *
     * From 1.0.7.2, you can use GESHI_HEADER_NONE to specify that no header code
     * should be outputted.
     *
     * @param int The type of header to be used
     * @since 1.0.0
     */
    function set_header_type($type) {
        if (GESHI_HEADER_DIV != $type && GESHI_HEADER_PRE != $type && GESHI_HEADER_NONE != $type) {
            $this->error = GESHI_ERROR_INVALID_HEADER_TYPE;
            return;
        }
        $this->header_type = $type;
        // Set a default overall style if the header is a <div>
        if (GESHI_HEADER_DIV == $type && !$this->overall_style) {
            $this->overall_style = 'font-family: monospace;';
        }
    }

    /**
     * Sets the styles for the code that will be outputted
     * when this object is parsed. The style should be a
     * string of valid stylesheet declarations
     *
     * @param string  The overall style for the outputted code block
     * @param boolean Whether to merge the styles with the current styles or not
     * @since 1.0.0
     */
    function set_overall_style($style, $preserve_defaults = false) {
        if (!$preserve_defaults) {
            $this->overall_style = $style;
        }
        else {
            $this->overall_style .= $style;
        }
    }

    /**
     * Sets the overall classname for this block of code. This
     * class can then be used in a stylesheet to style this object's
     * output
     *
     * @param string The class name to use for this block of code
     * @since 1.0.0
     */
    function set_overall_class($class) {
        $this->overall_class = $class;
    }

    /**
     * Sets the overall id for this block of code. This id can then
     * be used in a stylesheet to style this object's output
     *
     * @param string The ID to use for this block of code
     * @since 1.0.0
     */
    function set_overall_id($id) {
        $this->overall_id = $id;
    }

    /**
     * Sets whether CSS classes should be used to highlight the source. Default
     * is off, calling this method with no arguments will turn it on
     *
     * @param boolean Whether to turn classes on or not
     * @since 1.0.0
     */
    function enable_classes($flag = true) {
        $this->use_classes = ($flag) ? true : false;
    }

    /**
     * Sets the style for the actual code. This should be a string
     * containing valid stylesheet declarations. If $preserve_defaults is
     * true, then styles are merged with the default styles, with the
     * user defined styles having priority
     *
     * Note: Use this method to override any style changes you made to
     * the line numbers if you are using line numbers, else the line of
     * code will have the same style as the line number! Consult the
     * GeSHi documentation for more information about this.
     *
     * @param string  The style to use for actual code
     * @param boolean Whether to merge the current styles with the new styles
     */
    function set_code_style($style, $preserve_defaults = false) {
        if (!$preserve_defaults) {
            $this->code_style = $style;
        }
        else {
            $this->code_style .= $style;
        }
    }

    /**
     * Sets the styles for the line numbers.
     *
     * @param string The style for the line numbers that are "normal"
     * @param string|boolean If a string, this is the style of the line
     *        numbers that are "fancy", otherwise if boolean then this
     *        defines whether the normal styles should be merged with the
     *        new normal styles or not
     * @param boolean If set, is the flag for whether to merge the "fancy"
     *        styles with the current styles or not
     * @since 1.0.2
     */
    function set_line_style($style1, $style2 = '', $preserve_defaults = false) {
        if (is_bool($style2)) {
            $preserve_defaults = $style2;
            $style2 = '';
        }
        if (!$preserve_defaults) {
            $this->line_style1 = $style1;
            $this->line_style2 = $style2;
        }
        else {
            $this->line_style1 .= $style1;
            $this->line_style2 .= $style2;
        }
    }

    /**
     * Sets whether line numbers should be displayed.
     *
     * Valid values for the first parameter are:
     *
     *  - GESHI_NO_LINE_NUMBERS: Line numbers will not be displayed
     *  - GESHI_NORMAL_LINE_NUMBERS: Line numbers will be displayed
     *  - GESHI_FANCY_LINE_NUMBERS: Fancy line numbers will be displayed
     *
     * For fancy line numbers, the second parameter is used to signal which lines
     * are to be fancy. For example, if the value of this parameter is 5 then every
     * 5th line will be fancy.
     *
     * @param int How line numbers should be displayed
     * @param int Defines which lines are fancy
     * @since 1.0.0
     */
    function enable_line_numbers($flag, $nth_row = 5) {
        if (GESHI_NO_LINE_NUMBERS != $flag && GESHI_NORMAL_LINE_NUMBERS != $flag
            && GESHI_FANCY_LINE_NUMBERS != $flag) {
            $this->error = GESHI_ERROR_INVALID_LINE_NUMBER_TYPE;
        }
        $this->line_numbers = $flag;
        $this->line_nth_row = $nth_row;
    }

    /**
     * Sets the style for a keyword group. If $preserve_defaults is
     * true, then styles are merged with the default styles, with the
     * user defined styles having priority
     *
     * @param int     The key of the keyword group to change the styles of
     * @param string  The style to make the keywords
     * @param boolean Whether to merge the new styles with the old or just
     *                to overwrite them
     * @since 1.0.0
     */
    function set_keyword_group_style($key, $style, $preserve_defaults = false) {
        if (!$preserve_defaults) {
            $this->language_data['STYLES']['KEYWORDS'][$key] = $style;
        }
        else {
            $this->language_data['STYLES']['KEYWORDS'][$key] .= $style;
        }
    }

    /**
     * Turns highlighting on/off for a keyword group
     *
     * @param int     The key of the keyword group to turn on or off
     * @param boolean Whether to turn highlighting for that group on or off
     * @since 1.0.0
     */
    function set_keyword_group_highlighting($key, $flag = true) {
        $this->lexic_permissions['KEYWORDS'][$key] = ($flag) ? true : false;
    }

    /**
     * Sets the styles for comment groups.  If $preserve_defaults is
     * true, then styles are merged with the default styles, with the
     * user defined styles having priority
     *
     * @param int     The key of the comment group to change the styles of
     * @param string  The style to make the comments
     * @param boolean Whether to merge the new styles with the old or just
     *                to overwrite them
     * @since 1.0.0
     */
    function set_comments_style($key, $style, $preserve_defaults = false) {
        if (!$preserve_defaults) {