pug-php/ci-pug

<?php

namespace Jade\Lexer;

/**
 * Class Jade\Lexer\InputHandler.
 */
abstract class InputHandler
{
    /**
     * @var string
     */
    public $input;

    /**
     * @var array
     */
    protected $deferred = array();

    /**
     * @var array
     */
    protected $indentStack = array();

    /**
     * @var array
     */
    protected $stash = array();

    /**
     * Set lexer input.
     *
     * @param string $input input string
     */
    public function setInput($input)
    {
        $this->input = preg_replace("/\r\n|\r/", "\n", $input);
        $this->lineno = 1;
        $this->deferred = array();
        $this->indentStack = array();
        $this->stash = array();
    }

    /**
     * @return int
     */
    public function length()
    {
        return mb_strlen($this->input);
    }

    /**
     * @param $code
     *
     * @return string
     */
    protected function normalizeCode($code)
    {
        return $code = (substr($code, -1) === ':' && substr($code, -2, 1) !== ':')
            ? substr($code, 0, -1)
            : $code;
    }

    protected function getNextIndent()
    {
        if (isset($this->identRE)) {
            return preg_match($this->identRE, $this->input, $matches) ? $matches : null;
        }

        $indent = "/^\n(".($this->allowMixedIndent ? '[\t ]*' : '\t*').')/';
        $found = preg_match($indent, $this->input, $matches);

        if ($found && mb_strlen($matches[1]) === 0) {
            $indent = "/^\n( *)/";
            $found = preg_match($indent, $this->input, $matches);
        }

        if ($found && mb_strlen($matches[1]) !== 0) {
            $this->identRE = $indent;
        }

        return $found ? $matches : null;
    }

    protected function getWhiteSpacesTokens($indents)
    {
        if ($indents && count($this->indentStack) && $indents == $this->indentStack[0]) {
            return $this->token('newline');
        }

        if ($indents) {
            array_unshift($this->indentStack, $indents);

            return $this->token('indent', $indents);
        }

        return $this->token('newline');
    }

    protected function getTokenFromIndent($firstChar, $indents)
    {
        if ($this->length() && $firstChar === "\n") {
            return $this->token('newline');
        }

        if (count($this->indentStack) && $indents < $this->indentStack[0]) {
            while (count($this->indentStack) && $indents < $this->indentStack[0]) {
                array_push($this->stash, $this->token('outdent'));
                array_shift($this->indentStack);
            }

            return array_pop($this->stash);
        }

        return $this->getWhiteSpacesTokens($indents);
    }
}