<?php

> 


/**
 * SCSSPHP
 *

<  * @copyright 2012-2019 Leaf Corcoran



>  * @copyright 2012-2020 Leaf Corcoran


 *
 * @license http://opensource.org/licenses/MIT MIT
 *
 * @link http://scssphp.github.io/scssphp
 */

namespace ScssPhp\ScssPhp;

use ScssPhp\ScssPhp\Formatter\OutputBlock;
use ScssPhp\ScssPhp\SourceMap\SourceMapGenerator;

/**
 * Base formatter
 *
 * @author Leaf Corcoran <leafot@gmail.com>

>  *
 */
>  * @internal


abstract class Formatter
{
    /**

<      * @var integer



>      * @var int


     */
    public $indentLevel;

    /**
     * @var string
     */
    public $indentChar;

    /**
     * @var string
     */
    public $break;

    /**
     * @var string
     */
    public $open;

    /**
     * @var string
     */
    public $close;

    /**
     * @var string
     */
    public $tagSeparator;

    /**
     * @var string
     */
    public $assignSeparator;

    /**

<      * @var boolean



>      * @var bool


     */
    public $keepSemicolons;

    /**
     * @var \ScssPhp\ScssPhp\Formatter\OutputBlock
     */
    protected $currentBlock;

    /**

<      * @var integer



>      * @var int


     */
    protected $currentLine;

    /**

<      * @var integer



>      * @var int


     */
    protected $currentColumn;

    /**

<      * @var \ScssPhp\ScssPhp\SourceMap\SourceMapGenerator



>      * @var \ScssPhp\ScssPhp\SourceMap\SourceMapGenerator|null


     */
    protected $sourceMapGenerator;

    /**
     * @var string
     */
    protected $strippedSemicolon;

    /**
     * Initialize formatter
     *
     * @api
     */
    abstract public function __construct();

    /**
     * Return indentation (whitespace)
     *
     * @return string
     */
    protected function indentStr()
    {
        return '';
    }

    /**
     * Return property assignment
     *
     * @api
     *
     * @param string $name
     * @param mixed  $value
     *
     * @return string
     */
    public function property($name, $value)
    {
        return rtrim($name) . $this->assignSeparator . $value . ';';
    }

    /**

>      * Return custom property assignment
     * Output lines inside a block
>      * differs in that you have to keep spaces in the value as is
     *
>      *
     * @param \ScssPhp\ScssPhp\Formatter\OutputBlock $block
>      * @api
     */
>      *
    protected function blockLines(OutputBlock $block)
>      * @param string $name
    {
>      * @param mixed  $value
        $inner = $this->indentStr();
>      *

>      * @return string
        $glue = $this->break . $inner;
>      */

>     public function customProperty($name, $value)
        $this->write($inner . implode($glue, $block->lines));
>     {

>         return rtrim($name) . trim($this->assignSeparator) . $value . ';';
        if (! empty($block->children)) {
>     }
            $this->write($this->break);
> 
        }
>     /**


    }

>      *

>      * @return void



< 


     * Output block selectors
     *
     * @param \ScssPhp\ScssPhp\Formatter\OutputBlock $block

>      *
     */
>      * @return void


    protected function blockSelectors(OutputBlock $block)
    {

>         assert(! empty($block->selectors));
        $inner = $this->indentStr();
> 



        $this->write($inner
            . implode($this->tagSeparator, $block->selectors)
            . $this->open . $this->break);
    }

    /**
     * Output block children
     *
     * @param \ScssPhp\ScssPhp\Formatter\OutputBlock $block

>      *
     */
>      * @return void


    protected function blockChildren(OutputBlock $block)
    {
        foreach ($block->children as $child) {
            $this->block($child);
        }
    }

    /**
     * Output non-empty block
     *
     * @param \ScssPhp\ScssPhp\Formatter\OutputBlock $block

>      *
     */
>      * @return void


    protected function block(OutputBlock $block)
    {
        if (empty($block->lines) && empty($block->children)) {
            return;
        }

        $this->currentBlock = $block;

        $pre = $this->indentStr();

        if (! empty($block->selectors)) {
            $this->blockSelectors($block);

            $this->indentLevel++;
        }

        if (! empty($block->lines)) {
            $this->blockLines($block);
        }

        if (! empty($block->children)) {
            $this->blockChildren($block);
        }

        if (! empty($block->selectors)) {
            $this->indentLevel--;

            if (! $this->keepSemicolons) {
                $this->strippedSemicolon = '';
            }

            if (empty($block->children)) {
                $this->write($this->break);
            }

            $this->write($pre . $this->close . $this->break);
        }
    }

    /**
     * Test and clean safely empty children
     *
     * @param \ScssPhp\ScssPhp\Formatter\OutputBlock $block
     *

<      * @return boolean



>      * @return bool


     */
    protected function testEmptyChildren($block)
    {
        $isEmpty = empty($block->lines);

        if ($block->children) {
            foreach ($block->children as $k => &$child) {
                if (! $this->testEmptyChildren($child)) {
                    $isEmpty = false;
                    continue;
                }

                if ($child->type === Type::T_MEDIA || $child->type === Type::T_DIRECTIVE) {
                    $child->children = [];
                    $child->selectors = null;
                }
            }
        }

        return $isEmpty;
    }

    /**
     * Entry point to formatting a block
     *
     * @api
     *
     * @param \ScssPhp\ScssPhp\Formatter\OutputBlock             $block              An abstract syntax tree
     * @param \ScssPhp\ScssPhp\SourceMap\SourceMapGenerator|null $sourceMapGenerator Optional source map generator
     *
     * @return string
     */
    public function format(OutputBlock $block, SourceMapGenerator $sourceMapGenerator = null)
    {
        $this->sourceMapGenerator = null;

        if ($sourceMapGenerator) {
            $this->currentLine        = 1;
            $this->currentColumn      = 0;
            $this->sourceMapGenerator = $sourceMapGenerator;
        }

        $this->testEmptyChildren($block);

        ob_start();


>         try {


        $this->block($block);

>         } catch (\Exception $e) {

>             ob_end_clean();
        $out = ob_get_clean();
>             throw $e;

>         } catch (\Throwable $e) {
        return $out;
>             ob_end_clean();
    }
>             throw $e;

>         }


    /**

>         assert($out !== false);


     * Output content
     *
     * @param string $str

>      *
     */
>      * @return void


    protected function write($str)
    {
        if (! empty($this->strippedSemicolon)) {
            echo $this->strippedSemicolon;

            $this->strippedSemicolon = '';
        }

        /*
         * Maybe Strip semi-colon appended by property(); it's a separator, not a terminator
         * will be striped for real before a closing, otherwise displayed unchanged starting the next write
         */

<         if (! $this->keepSemicolons &&



>         if (
>             ! $this->keepSemicolons &&


            $str &&
            (strpos($str, ';') !== false) &&
            (substr($str, -1) === ';')
        ) {
            $str = substr($str, 0, -1);

            $this->strippedSemicolon = ';';
        }

        if ($this->sourceMapGenerator) {

>             $lines = explode("\n", $str);
            $this->sourceMapGenerator->addMapping(
>             $lastLine = array_pop($lines);
                $this->currentLine,
> 
                $this->currentColumn,
>             foreach ($lines as $line) {
                $this->currentBlock->sourceLine,
>                 // If the written line starts is empty, adding a mapping would add it for
                //columns from parser are off by one
>                 // a non-existent column as we are at the end of the line
                $this->currentBlock->sourceColumn > 0 ? $this->currentBlock->sourceColumn - 1 : 0,
>                 if ($line !== '') {
                $this->currentBlock->sourceName
>                     assert($this->currentBlock->sourceLine !== null);
            );
>                     assert($this->currentBlock->sourceName !== null);




>                 }



<             $lines = explode("\n", $str);
<             $lineCount = count($lines);
<             $this->currentLine += $lineCount-1;



>                 $this->currentLine++;
>                 $this->currentColumn = 0;
>             }




<             $lastLine = array_pop($lines);



>             if ($lastLine !== '') {
>                 assert($this->currentBlock->sourceLine !== null);
>                 assert($this->currentBlock->sourceName !== null);
>                 $this->sourceMapGenerator->addMapping(
>                     $this->currentLine,
>                     $this->currentColumn,
>                     $this->currentBlock->sourceLine,
>                     //columns from parser are off by one
>                     $this->currentBlock->sourceColumn > 0 ? $this->currentBlock->sourceColumn - 1 : 0,
>                     $this->currentBlock->sourceName
>                 );
>             }




<             $this->currentColumn = ($lineCount === 1 ? $this->currentColumn : 0) + strlen($lastLine);



>             $this->currentColumn += \strlen($lastLine);


        }

        echo $str;
    }
}