<?php
/**
 * Ensure there is no space before a colon and one space after it.
 *
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Standards\Squiz\Sniffs\CSS;

use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Util\Tokens;

class ColonSpacingSniff implements Sniff
{

    /**
     * A list of tokenizers this sniff supports.
     *
     * @var array
     */
    public $supportedTokenizers = ['CSS'];


    /**
     * Returns the token types that this sniff is interested in.
     *
     * @return array<int|string>
     */
    public function register()
    {
        return [T_COLON];

    }//end register()


    /**
     * Processes the tokens that this sniff is interested in.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where the token was found.
     * @param int                         $stackPtr  The position in the stack where
     *                                               the token was found.
     *
     * @return void
     */
    public function process(File $phpcsFile, $stackPtr)
    {
        $tokens = $phpcsFile->getTokens();

        $prev = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($stackPtr - 1), null, true);
        if ($tokens[$prev]['code'] !== T_STYLE) {
            // The colon is not part of a style definition.
            return;
        }

        if ($tokens[$prev]['content'] === 'progid') {
            // Special case for IE filters.
            return;
        }

        if ($tokens[($stackPtr - 1)]['code'] === T_WHITESPACE) {
            $error = 'There must be no space before a colon in a style definition';
            $fix   = $phpcsFile->addFixableError($error, $stackPtr, 'Before');
            if ($fix === true) {
                $phpcsFile->fixer->replaceToken(($stackPtr - 1), '');
            }
        }

        $next = $phpcsFile->findNext(T_WHITESPACE, ($stackPtr + 1), null, true);
        if ($tokens[$next]['code'] === T_SEMICOLON || $tokens[$next]['code'] === T_STYLE) {
            // Empty style definition, ignore it.
            return;
        }

        if ($tokens[($stackPtr + 1)]['code'] !== T_WHITESPACE) {
            $error = 'Expected 1 space after colon in style definition; 0 found';
            $fix   = $phpcsFile->addFixableError($error, $stackPtr, 'NoneAfter');
            if ($fix === true) {
                $phpcsFile->fixer->addContent($stackPtr, ' ');
            }
        } else {
            $content = $tokens[($stackPtr + 1)]['content'];
            if (strpos($content, $phpcsFile->eolChar) === false) {
                $length = strlen($content);
                if ($length !== 1) {
                    $error = 'Expected 1 space after colon in style definition; %s found';
                    $data  = [$length];
                    $fix   = $phpcsFile->addFixableError($error, $stackPtr, 'After', $data);
                    if ($fix === true) {
                        $phpcsFile->fixer->replaceToken(($stackPtr + 1), ' ');
                    }
                }
            } else {
                $error = 'Expected 1 space after colon in style definition; newline found';
                $fix   = $phpcsFile->addFixableError($error, $stackPtr, 'AfterNewline');
                if ($fix === true) {
                    $phpcsFile->fixer->replaceToken(($stackPtr + 1), ' ');
                }
            }
        }//end if

    }//end process()


}//end class
