DocParser::preProcessInput() - Code Metrics - Inspection of "Merge branch 'remove-deprecations'" - thephpleague/commonmark - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 585e6a...d168ab )

by Colin

created 2019-05-27 17:22 UTC

DocParser::preProcessInput() A

↳ Parent: DocParser

Complexity

Conditions	2
Paths	2

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	2

Importance

Changes

Metric	Value
dl	0
loc	13
ccs	5
cts	5
cp	1
rs	9.8333
c	0
b	0
f	0
cc	2
nc	2
nop	1
crap	2

<?php

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell <[email protected]>
 *
 * Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
 *  - (c) John MacFarlane
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace League\CommonMark;

use League\CommonMark\Block\Element\AbstractBlock;
use League\CommonMark\Block\Element\AbstractStringContainerBlock;
use League\CommonMark\Block\Element\Document;
use League\CommonMark\Block\Element\Paragraph;
use League\CommonMark\Block\Element\StringContainerInterface;

final class DocParser implements DocParserInterface
{
    /**
     * @var EnvironmentInterface
     */
    private $environment;

    /**
     * @var InlineParserEngine
     */
    private $inlineParserEngine;

    /**
     * @var int|float
     */
    private $maxNestingLevel;

    /**
     * @param EnvironmentInterface $environment
     */
    public function __construct(EnvironmentInterface $environment)
    {
        $this->environment = $environment;
        $this->inlineParserEngine = new InlineParserEngine($environment);
        $this->maxNestingLevel = $environment->getConfig('max_nesting_level', INF);
    }

    /**
     * @param string $input
     *
     * @return string[]
     */
    private function preProcessInput(string $input): array
    {
        $lines = \preg_split('/\r\n|\n|\r/', $input);

        // Remove any newline which appears at the very end of the string.
        // We've already split the document by newlines, so we can simply drop
        // any empty element which appears on the end.
        if (\end($lines) === '') {
            \array_pop($lines);
        }

        return $lines;
    }

    /**
     * @param string $input
     *
     * @return Document
     */
    public function parse(string $input): Document
    {
        $context = new Context(new Document(), $this->environment);

        $lines = $this->preProcessInput($input);
        foreach ($lines as $line) {
            $context->setNextLine($line);
            $this->incorporateLine($context);
        }

        $lineCount = \count($lines);
        while ($tip = $context->getTip()) {
            $tip->finalize($context, $lineCount);
        }

        $this->processInlines($context);

        $this->processDocument($context);

        return $context->getDocument();
    }

    private function incorporateLine(ContextInterface $context)
    {
        $context->getBlockCloser()->resetTip();
        $context->setBlocksParsed(false);

        $cursor = new Cursor($context->getLine());

        $this->resetContainer($context, $cursor);
        $context->getBlockCloser()->setLastMatchedContainer($context->getContainer());

        $this->parseBlocks($context, $cursor);

        // What remains at the offset is a text line.  Add the text to the appropriate container.
        // First check for a lazy paragraph continuation:
        if ($this->handleLazyParagraphContinuation($context, $cursor)) {
            return;
        }

        // not a lazy continuation
        // finalize any blocks not matched
        $context->getBlockCloser()->closeUnmatchedBlocks();

        // Determine whether the last line is blank, updating parents as needed
        $this->setAndPropagateLastLineBlank($context, $cursor);

        // Handle any remaining cursor contents
        if ($context->getContainer() instanceof StringContainerInterface) {
            $context->getContainer()->handleRemainingContents($context, $cursor);
        } elseif (!$cursor->isBlank()) {
            // Create paragraph container for line
            $p = new Paragraph();
            $context->addBlock($p);
            $cursor->advanceToNextNonSpaceOrTab();
            $p->addLine($cursor->getRemainder());
        }
    }

    private function processDocument(ContextInterface $context)
    {
        foreach ($this->environment->getDocumentProcessors() as $documentProcessor) {
            $documentProcessor->processDocument($context->getDocument());
        }
    }

    private function processInlines(ContextInterface $context)
    {
        $walker = $context->getDocument()->walker();

        while ($event = $walker->next()) {
            if (!$event->isEntering()) {
                continue;
            }

            $node = $event->getNode();
            if ($node instanceof AbstractStringContainerBlock) {
                $this->inlineParserEngine->parse($node, $context->getDocument()->getReferenceMap());
            }
        }
    }

    /**
     * Sets the container to the last open child (or its parent)
     *
     * @param ContextInterface $context
     * @param Cursor           $cursor
     */
    private function resetContainer(ContextInterface $context, Cursor $cursor)
    {
        $container = $context->getDocument();

        while ($lastChild = $container->lastChild()) {
            if (!($lastChild instanceof AbstractBlock)) {
                break;
            }

            if (!$lastChild->isOpen()) {
                break;
            }

            $container = $lastChild;
            if (!$container->matchesNextLine($cursor)) {
                $container = $container->parent(); // back up to the last matching block
                break;
            }
        }

        $context->setContainer($container);
    }

    /**
     * Parse blocks
     *
     * @param ContextInterface $context
     * @param Cursor           $cursor
     */
    private function parseBlocks(ContextInterface $context, Cursor $cursor)
    {
        while (!$context->getContainer()->isCode() && !$context->getBlocksParsed()) {
            $parsed = false;
            foreach ($this->environment->getBlockParsers() as $parser) {
                if ($parser->parse($context, $cursor)) {
                    $parsed = true;
                    break;
                }
            }

            if (!$parsed || $context->getContainer() instanceof StringContainerInterface || (($tip = $context->getTip()) && $tip->getDepth() >= $this->maxNestingLevel)) {
                $context->setBlocksParsed(true);
                break;
            }
        }
    }

    /**
     * @param ContextInterface $context
     * @param Cursor           $cursor
     *
     * @return bool
     */
    private function handleLazyParagraphContinuation(ContextInterface $context, Cursor $cursor): bool
    {
        $tip = $context->getTip();

        if ($tip instanceof Paragraph &&
            !$context->getBlockCloser()->areAllClosed() &&
            !$cursor->isBlank() &&
            \count($tip->getStrings()) > 0) {

            // lazy paragraph continuation
            $tip->addLine($cursor->getRemainder());

            return true;
        }

        return false;
    }

    /**
     * @param ContextInterface $context
     * @param Cursor           $cursor
     */
    private function setAndPropagateLastLineBlank(ContextInterface $context, Cursor $cursor)
    {
        $container = $context->getContainer();

        if ($cursor->isBlank() && $lastChild = $container->lastChild()) {
            if ($lastChild instanceof AbstractBlock) {
                $lastChild->setLastLineBlank(true);
            }
        }

        $lastLineBlank = $container->shouldLastLineBeBlank($cursor, $context->getLineNumber());

        // Propagate lastLineBlank up through parents:
        while ($container instanceof AbstractBlock) {
            $container->setLastLineBlank($lastLineBlank);
            $container = $container->parent();
        }
    }
}


1		<?php
2
3		/*
4		* This file is part of the league/commonmark package.
5		*
6		* (c) Colin O'Dell <[email protected]>
7		*
8		* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
9		* - (c) John MacFarlane
10		*
11		* For the full copyright and license information, please view the LICENSE
12		* file that was distributed with this source code.
13		*/
14
15		namespace League\CommonMark;
16
17		use League\CommonMark\Block\Element\AbstractBlock;
18		use League\CommonMark\Block\Element\AbstractStringContainerBlock;
19		use League\CommonMark\Block\Element\Document;
20		use League\CommonMark\Block\Element\Paragraph;
21		use League\CommonMark\Block\Element\StringContainerInterface;
22
23		final class DocParser implements DocParserInterface
24		{
25		/**
26		* @var EnvironmentInterface
27		*/
28		private $environment;
29
30		/**
31		* @var InlineParserEngine
32		*/
33		private $inlineParserEngine;
34
35		/**
36		* @var int\|float
37		*/
38		private $maxNestingLevel;
39
40		/**
41		* @param EnvironmentInterface $environment
42		*/
43	2070	public function __construct(EnvironmentInterface $environment)
44		{
45	2070	$this->environment = $environment;
46	2070	$this->inlineParserEngine = new InlineParserEngine($environment);
47	2070	$this->maxNestingLevel = $environment->getConfig('max_nesting_level', INF);
48	2070	}
49
50		/**
51		* @param string $input
52		*
53		* @return string[]
54		*/
55	2061	private function preProcessInput(string $input): array
56		{
57	2061	$lines = \preg_split('/\r\n\|\n\|\r/', $input);
58
59		// Remove any newline which appears at the very end of the string.
60		// We've already split the document by newlines, so we can simply drop
61		// any empty element which appears on the end.
62	2061	if (\end($lines) === '') {
63	2013	\array_pop($lines);
64		}
65
66	2061	return $lines;
67		}
68
69		/**
70		* @param string $input
71		*
72		* @return Document
73		*/
74	2061	public function parse(string $input): Document
75		{
76	2061	$context = new Context(new Document(), $this->environment);
77
78	2061	$lines = $this->preProcessInput($input);
79	2061	foreach ($lines as $line) {
80	2061	$context->setNextLine($line);
81	2061	$this->incorporateLine($context);
82		}
83
84	2061	$lineCount = \count($lines);
85	2061	while ($tip = $context->getTip()) {
86	2061	$tip->finalize($context, $lineCount);
87		}
88
89	2061	$this->processInlines($context);
90
91	2061	$this->processDocument($context);
92
93	2061	return $context->getDocument();
94		}
95
96	2061	private function incorporateLine(ContextInterface $context)
97		{
98	2061	$context->getBlockCloser()->resetTip();
99	2061	$context->setBlocksParsed(false);
100
101	2061	$cursor = new Cursor($context->getLine());
102
103	2061	$this->resetContainer($context, $cursor);
104	2061	$context->getBlockCloser()->setLastMatchedContainer($context->getContainer());
105
106	2061	$this->parseBlocks($context, $cursor);
107
108		// What remains at the offset is a text line. Add the text to the appropriate container.
109		// First check for a lazy paragraph continuation:
110	2061	if ($this->handleLazyParagraphContinuation($context, $cursor)) {
111	36	return;
112		}
113
114		// not a lazy continuation
115		// finalize any blocks not matched
116	2061	$context->getBlockCloser()->closeUnmatchedBlocks();
117
118		// Determine whether the last line is blank, updating parents as needed
119	2061	$this->setAndPropagateLastLineBlank($context, $cursor);
120
121		// Handle any remaining cursor contents
122	2061	if ($context->getContainer() instanceof StringContainerInterface) {
123	753	$context->getContainer()->handleRemainingContents($context, $cursor);
124	1812	} elseif (!$cursor->isBlank()) {
125		// Create paragraph container for line
126	1731	$p = new Paragraph();
127	1731	$context->addBlock($p);
128	1731	$cursor->advanceToNextNonSpaceOrTab();
129	1731	$p->addLine($cursor->getRemainder());
130		}
131	2061	}
132
133	2061	private function processDocument(ContextInterface $context)
134		{
135	2061	foreach ($this->environment->getDocumentProcessors() as $documentProcessor) {
136		$documentProcessor->processDocument($context->getDocument());
137		}
138	2061	}
139
140	2061	private function processInlines(ContextInterface $context)
141		{
142	2061	$walker = $context->getDocument()->walker();
143
144	2061	while ($event = $walker->next()) {
145	2061	if (!$event->isEntering()) {
146	2061	continue;
147		}
148
149	2061	$node = $event->getNode();
150	2061	if ($node instanceof AbstractStringContainerBlock) {
151	2019	$this->inlineParserEngine->parse($node, $context->getDocument()->getReferenceMap());
152		}
153		}
154	2061	}
155
156		/**
157		* Sets the container to the last open child (or its parent)
158		*
159		* @param ContextInterface $context
160		* @param Cursor $cursor
161		*/
162	2061	private function resetContainer(ContextInterface $context, Cursor $cursor)
163		{
164	2061	$container = $context->getDocument();
165
166	2061	while ($lastChild = $container->lastChild()) {
167	1119	if (!($lastChild instanceof AbstractBlock)) {
168		break;
169		}
170
171	1119	if (!$lastChild->isOpen()) {
172	453	break;
173		}
174
175	1110	$container = $lastChild;
176	1110	if (!$container->matchesNextLine($cursor)) {
177	708	$container = $container->parent(); // back up to the last matching block
178	708	break;
179		}
180		}
181
182	2061	$context->setContainer($container);
183	2061	}
184
185		/**
186		* Parse blocks
187		*
188		* @param ContextInterface $context
189		* @param Cursor $cursor
190		*/
191	2061	private function parseBlocks(ContextInterface $context, Cursor $cursor)
192		{
193	2061	while (!$context->getContainer()->isCode() && !$context->getBlocksParsed()) {
194	2061	$parsed = false;
195	2061	foreach ($this->environment->getBlockParsers() as $parser) {
196	2061	if ($parser->parse($context, $cursor)) {
197	819	$parsed = true;
198	1233	break;
199		}
200		}
201
202	2061	if (!$parsed \|\| $context->getContainer() instanceof StringContainerInterface \|\| (($tip = $context->getTip()) && $tip->getDepth() >= $this->maxNestingLevel)) {
203	2034	$context->setBlocksParsed(true);
204	2034	break;
205		}
206		}
207	2061	}
208
209		/**
210		* @param ContextInterface $context
211		* @param Cursor $cursor
212		*
213		* @return bool
214		*/
215	2061	private function handleLazyParagraphContinuation(ContextInterface $context, Cursor $cursor): bool
216		{
217	2061	$tip = $context->getTip();
218
219	2061	if ($tip instanceof Paragraph &&
220	2061	!$context->getBlockCloser()->areAllClosed() &&
221	2061	!$cursor->isBlank() &&
222	2061	\count($tip->getStrings()) > 0) {
223
224		// lazy paragraph continuation
225	36	$tip->addLine($cursor->getRemainder());
226
227	36	return true;
228		}
229
230	2061	return false;
231		}
232
233		/**
234		* @param ContextInterface $context
235		* @param Cursor $cursor
236		*/
237	2061	private function setAndPropagateLastLineBlank(ContextInterface $context, Cursor $cursor)
238		{
239	2061	$container = $context->getContainer();
240
241	2061	if ($cursor->isBlank() && $lastChild = $container->lastChild()) {
242	468	if ($lastChild instanceof AbstractBlock) {
243	468	$lastChild->setLastLineBlank(true);
244		}
245		}
246
247	2061	$lastLineBlank = $container->shouldLastLineBeBlank($cursor, $context->getLineNumber());
248
249		// Propagate lastLineBlank up through parents:
250	2061	while ($container instanceof AbstractBlock) {
251	2061	$container->setLastLineBlank($lastLineBlank);
252	2061	$container = $container->parent();
253		}
254	2061	}
255		}
256

thephpleague / commonmark

Push — master ( 585e6a...d168ab )

DocParser::preProcessInput() A

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