Cursor::getPreviousText() - Code Metrics - Inspection of "Increase phpstan level to max" - thephpleague/commonmark - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( deae46...6c5f37 )

by Colin

created 2020-05-10 16:36 UTC

Cursor::getPreviousText() A

↳ Parent: Cursor

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes

Metric	Value
dl	0
loc	4
ccs	2
cts	2
cp	1
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	0
crap	1

<?php

declare(strict_types=1);

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace League\CommonMark\Parser;

class Cursor
{
    public const INDENT_LEVEL = 4;

    /**
     * @var string
     *
     * @psalm-readonly
     */
    private $line;

    /**
     * @var int
     *
     * @psalm-readonly
     */
    private $length;

    /**
     * @var int
     *
     * It's possible for this to be 1 char past the end, meaning we've parsed all chars and have
     * reached the end.  In this state, any character-returning method MUST return null.
     */
    private $currentPosition = 0;

    /** @var int */
    private $column = 0;

    /** @var int */
    private $indent = 0;

    /** @var int */
    private $previousPosition = 0;

    /** @var int|null */
    private $nextNonSpaceCache;

    /** @var bool */
    private $partiallyConsumedTab = false;

    /**
     * @var bool
     *
     * @psalm-readonly
     */
    private $lineContainsTabs;

    /**
     * @var bool
     *
     * @psalm-readonly
     */
    private $isMultibyte;

    /** @var array<int, string> */
    private $charCache = [];

    /**
     * @param string $line The line being parsed (ASCII or UTF-8)
     */
    public function __construct(string $line)
    {
        $this->line             = $line;
        $this->length           = \mb_strlen($line, 'UTF-8') ?: 0;
        $this->isMultibyte      = $this->length !== \strlen($line);
        $this->lineContainsTabs = \strpos($line, "\t") !== false;
    }

    /**
     * Returns the position of the next character which is not a space (or tab)
     */
    public function getNextNonSpacePosition(): int
    {
        if ($this->nextNonSpaceCache !== null) {
            return $this->nextNonSpaceCache;
        }

        $c    = null;
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
        $i    = $this->currentPosition;
        $cols = $this->column;

        while (($c = $this->getCharacter($i)) !== null) {
            if ($c === ' ') {
                $i++;
                $cols++;
            } elseif ($c === "\t") {
                $i++;
                $cols += 4 - ($cols % 4);
            } else {
                break;
            }
        }

        $nextNonSpace = $c === null ? $this->length : $i;
        $this->indent = $cols - $this->column;

        return $this->nextNonSpaceCache = $nextNonSpace;
    }

    /**
     * Returns the next character which isn't a space (or tab)
     */
    public function getNextNonSpaceCharacter(): ?string
    {
        return $this->getCharacter($this->getNextNonSpacePosition());
    }

    /**
     * Calculates the current indent (number of spaces after current position)
     */
    public function getIndent(): int
    {
        if ($this->nextNonSpaceCache === null) {
            $this->getNextNonSpacePosition();
        }

        return $this->indent;
    }

    /**
     * Whether the cursor is indented to INDENT_LEVEL
     */
    public function isIndented(): bool
    {
        return $this->getIndent() >= self::INDENT_LEVEL;
    }

    public function getCharacter(?int $index = null): ?string
    {
        if ($index === null) {
            $index = $this->currentPosition;
        }

        // Index out-of-bounds, or we're at the end
        if ($index < 0 || $index >= $this->length) {
            return null;
        }

        if ($this->isMultibyte) {
            if (isset($this->charCache[$index])) {
                return $this->charCache[$index];
            }

            return $this->charCache[$index] = \mb_substr($this->line, $index, 1, 'UTF-8');
        }

        return $this->line[$index];
    }

    /**
     * Returns the next character (or null, if none) without advancing forwards
     */
    public function peek(int $offset = 1): ?string
    {
        return $this->getCharacter($this->currentPosition + $offset);
    }

    /**
     * Whether the remainder is blank
     */
    public function isBlank(): bool
    {
        return $this->nextNonSpaceCache === $this->length || $this->getNextNonSpacePosition() === $this->length;
    }

    /**
     * Move the cursor forwards
     */
    public function advance(): void
    {
        $this->advanceBy(1);
    }

    /**
     * Move the cursor forwards
     *
     * @param int  $characters       Number of characters to advance by
     * @param bool $advanceByColumns Whether to advance by columns instead of spaces
     */
    public function advanceBy(int $characters, bool $advanceByColumns = false): void
    {
        if ($characters === 0) {
            $this->previousPosition = $this->currentPosition;

            return;
        }

        $this->previousPosition  = $this->currentPosition;
        $this->nextNonSpaceCache = null;

        // Optimization to avoid tab handling logic if we have no tabs
        if (! $this->lineContainsTabs) {
            $this->advanceWithoutTabCharacters($characters);

            return;
        }

        $nextFewChars = $this->isMultibyte ?
            \mb_substr($this->line, $this->currentPosition, $characters, 'UTF-8') :
            \substr($this->line, $this->currentPosition, $characters);

        // Optimization to avoid tab handling logic if we have no tabs
        if (\strpos($nextFewChars, "\t") === false) {
            $this->advanceWithoutTabCharacters($characters);

            return;
        }

        if ($characters === 1 && ! empty($nextFewChars)) {
            $asArray = [$nextFewChars];
        } elseif ($this->isMultibyte) {
            /** @var string[] $asArray */
            $asArray = \preg_split('//u', $nextFewChars, -1, \PREG_SPLIT_NO_EMPTY);
        } else {
            $asArray = \str_split($nextFewChars);
        }

        foreach ($asArray as $relPos => $c) {
            if ($c === "\t") {
                $charsToTab = 4 - ($this->column % 4);
                if ($advanceByColumns) {
                    $this->partiallyConsumedTab = $charsToTab > $characters;
                    $charsToAdvance             = $charsToTab > $characters ? $characters : $charsToTab;
                    $this->column              += $charsToAdvance;
                    $this->currentPosition     += $this->partiallyConsumedTab ? 0 : 1;
                    $characters                -= $charsToAdvance;
                } else {
                    $this->partiallyConsumedTab = false;
                    $this->column              += $charsToTab;
                    $this->currentPosition++;
                    $characters--;
                }
            } else {
                $this->partiallyConsumedTab = false;
                $this->currentPosition++;
                $this->column++;
                $characters--;
            }

            if ($characters <= 0) {
                break;
            }
        }
    }

    private function advanceWithoutTabCharacters(int $characters): void
    {
        $length                     = \min($characters, $this->length - $this->currentPosition);
        $this->partiallyConsumedTab = false;
        $this->currentPosition     += $length;
        $this->column              += $length;

        return;
    }

    /**
     * Advances the cursor by a single space or tab, if present
     */
    public function advanceBySpaceOrTab(): bool
    {
        $character = $this->getCharacter();

        if ($character === ' ' || $character === "\t") {
            $this->advanceBy(1, true);

            return true;
        }

        return false;
    }

    /**
     * Parse zero or more space/tab characters
     *
     * @return int Number of positions moved
     */
    public function advanceToNextNonSpaceOrTab(): int
    {
        $newPosition = $this->getNextNonSpacePosition();
        $this->advanceBy($newPosition - $this->currentPosition);
        $this->partiallyConsumedTab = false;

        return $this->currentPosition - $this->previousPosition;
    }

    /**
     * Parse zero or more space characters, including at most one newline.
     *
     * Tab characters are not parsed with this function.
     *
     * @return int Number of positions moved
     */
    public function advanceToNextNonSpaceOrNewline(): int
    {
        $remainder = $this->getRemainder();

        // Optimization: Avoid the regex if we know there are no spaces or newlines
        if (empty($remainder) || ($remainder[0] !== ' ' && $remainder[0] !== "\n")) {
            $this->previousPosition = $this->currentPosition;

            return 0;
        }

        $matches = [];
        \preg_match('/^ *(?:\n *)?/', $remainder, $matches, \PREG_OFFSET_CAPTURE);

        // [0][0] contains the matched text
        // [0][1] contains the index of that match
        $increment = $matches[0][1] + \strlen($matches[0][0]);

        $this->advanceBy($increment);

        return $this->currentPosition - $this->previousPosition;
    }

    /**
     * Move the position to the very end of the line
     *
     * @return int The number of characters moved
     */
    public function advanceToEnd(): int
    {
        $this->previousPosition  = $this->currentPosition;
        $this->nextNonSpaceCache = null;

        $this->currentPosition = $this->length;

        return $this->currentPosition - $this->previousPosition;
    }

    public function getRemainder(): string
    {
        if ($this->currentPosition >= $this->length) {
            return '';
        }

        $prefix   = '';
        $position = $this->currentPosition;
        if ($this->partiallyConsumedTab) {
            $position++;
            $charsToTab = 4 - ($this->column % 4);
            $prefix     = \str_repeat(' ', $charsToTab);
        }

        $subString = $this->isMultibyte ?
            \mb_substr($this->line, $position, null, 'UTF-8') :
            \substr($this->line, $position);

        return $prefix . $subString;
    }

    public function getLine(): string
    {
        return $this->line;
    }

    public function isAtEnd(): bool
    {
        return $this->currentPosition >= $this->length;
    }

    /**
     * Try to match a regular expression
     *
     * Returns the matching text and advances to the end of that match
     */
    public function match(string $regex): ?string
    {
        $subject = $this->getRemainder();

        if (! \preg_match($regex, $subject, $matches, \PREG_OFFSET_CAPTURE)) {
            return null;
        }

        // $matches[0][0] contains the matched text
        // $matches[0][1] contains the index of that match

        if ($this->isMultibyte) {
            // PREG_OFFSET_CAPTURE always returns the byte offset, not the char offset, which is annoying
            $offset      = \mb_strlen(\substr($subject, 0, $matches[0][1]), 'UTF-8');
            $matchLength = \mb_strlen($matches[0][0], 'UTF-8');
        } else {
            $offset      = $matches[0][1];
            $matchLength = \strlen($matches[0][0]);
        }

        // [0][0] contains the matched text
        // [0][1] contains the index of that match
        $this->advanceBy($offset + $matchLength);

        return $matches[0][0];
    }

    /**
     * Encapsulates the current state of this cursor in case you need to rollback later.
     *
     * WARNING: Do not parse or use the return value for ANYTHING except for
     * passing it back into restoreState(), as the number of values and their
     * contents may change in any future release without warning.
     */
    public function saveState(): CursorState
    {
        return new CursorState([
            $this->currentPosition,
            $this->previousPosition,
            $this->nextNonSpaceCache,
            $this->indent,
            $this->column,
            $this->partiallyConsumedTab,
        ]);
    }

    /**
     * Restore the cursor to a previous state.
     *
     * Pass in the value previously obtained by calling saveState().
     */
    public function restoreState(CursorState $state): void
    {
        [
            $this->currentPosition,
            $this->previousPosition,
            $this->nextNonSpaceCache,
            $this->indent,
            $this->column,
            $this->partiallyConsumedTab,
        ] = $state->toArray();
    }

    public function getPosition(): int
    {
        return $this->currentPosition;
    }

    public function getPreviousText(): string
    {
        return \mb_substr($this->line, $this->previousPosition, $this->currentPosition - $this->previousPosition, 'UTF-8');
    }

    public function getSubstring(int $start, ?int $length = null): string
    {
        if ($this->isMultibyte) {
            return \mb_substr($this->line, $start, $length, 'UTF-8');
        }

        if ($length !== null) {
            return \substr($this->line, $start, $length);
        }

        return \substr($this->line, $start);
    }

    public function getColumn(): int
    {
        return $this->column;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		/*
6		* This file is part of the league/commonmark package.
7		*
8		* (c) Colin O'Dell <[email protected]>
9		*
10		* For the full copyright and license information, please view the LICENSE
11		* file that was distributed with this source code.
12		*/
13
14		namespace League\CommonMark\Parser;
15
16		class Cursor
17		{
18		public const INDENT_LEVEL = 4;
19
20		/**
21		* @var string
22		*
23		* @psalm-readonly
24		*/
25		private $line;
26
27		/**
28		* @var int
29		*
30		* @psalm-readonly
31		*/
32		private $length;
33
34		/**
35		* @var int
36		*
37		* It's possible for this to be 1 char past the end, meaning we've parsed all chars and have
38		* reached the end. In this state, any character-returning method MUST return null.
39		*/
40		private $currentPosition = 0;
41
42		/** @var int */
43		private $column = 0;
44
45		/** @var int */
46		private $indent = 0;
47
48		/** @var int */
49		private $previousPosition = 0;
50
51		/** @var int\|null */
52		private $nextNonSpaceCache;
53
54		/** @var bool */
55		private $partiallyConsumedTab = false;
56
57		/**
58		* @var bool
59		*
60		* @psalm-readonly
61		*/
62		private $lineContainsTabs;
63
64		/**
65		* @var bool
66		*
67		* @psalm-readonly
68		*/
69		private $isMultibyte;
70
71		/** @var array<int, string> */
72		private $charCache = [];
73
74		/**
75		* @param string $line The line being parsed (ASCII or UTF-8)
76		*/
77	3000	public function __construct(string $line)
78		{
79	3000	$this->line = $line;
80	3000	$this->length = \mb_strlen($line, 'UTF-8') ?: 0;
81	3000	$this->isMultibyte = $this->length !== \strlen($line);
82	3000	$this->lineContainsTabs = \strpos($line, "\t") !== false;
83	3000	}
84
85		/**
86		* Returns the position of the next character which is not a space (or tab)
87		*/
88	2700	public function getNextNonSpacePosition(): int
89		{
90	2700	if ($this->nextNonSpaceCache !== null) {
91	2520	return $this->nextNonSpaceCache;
92		}
93
94	2700	$c = null;
		0 ignored issues – show Unused Code introduced 2020-05-10 16:16 UTC by Report Bug Copy Issue Report `$c` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
95	2700	$i = $this->currentPosition;
96	2700	$cols = $this->column;
97
98	2700	while (($c = $this->getCharacter($i)) !== null) {
99	2676	if ($c === ' ') {
100	813	$i++;
101	813	$cols++;
102	2634	} elseif ($c === "\t") {
103	36	$i++;
104	36	$cols += 4 - ($cols % 4);
105		} else {
106	2634	break;
107		}
108		}
109
110	2700	$nextNonSpace = $c === null ? $this->length : $i;
111	2700	$this->indent = $cols - $this->column;
112
113	2700	return $this->nextNonSpaceCache = $nextNonSpace;
114		}
115
116		/**
117		* Returns the next character which isn't a space (or tab)
118		*/
119	2466	public function getNextNonSpaceCharacter(): ?string
120		{
121	2466	return $this->getCharacter($this->getNextNonSpacePosition());
122		}
123
124		/**
125		* Calculates the current indent (number of spaces after current position)
126		*/
127	2580	public function getIndent(): int
128		{
129	2580	if ($this->nextNonSpaceCache === null) {
130	360	$this->getNextNonSpacePosition();
131		}
132
133	2580	return $this->indent;
134		}
135
136		/**
137		* Whether the cursor is indented to INDENT_LEVEL
138		*/
139	2520	public function isIndented(): bool
140		{
141	2520	return $this->getIndent() >= self::INDENT_LEVEL;
142		}
143
144	2760	public function getCharacter(?int $index = null): ?string
145		{
146	2760	if ($index === null) {
147	2472	$index = $this->currentPosition;
148		}
149
150		// Index out-of-bounds, or we're at the end
151	2760	if ($index < 0 \|\| $index >= $this->length) {
152	2370	return null;
153		}
154
155	2718	if ($this->isMultibyte) {
156	102	if (isset($this->charCache[$index])) {
157	48	return $this->charCache[$index];
158		}
159
160	102	return $this->charCache[$index] = \mb_substr($this->line, $index, 1, 'UTF-8');
161		}
162
163	2622	return $this->line[$index];
164		}
165
166		/**
167		* Returns the next character (or null, if none) without advancing forwards
168		*/
169	1332	public function peek(int $offset = 1): ?string
170		{
171	1332	return $this->getCharacter($this->currentPosition + $offset);
172		}
173
174		/**
175		* Whether the remainder is blank
176		*/
177	2514	public function isBlank(): bool
178		{
179	2514	return $this->nextNonSpaceCache === $this->length \|\| $this->getNextNonSpacePosition() === $this->length;
180		}
181
182		/**
183		* Move the cursor forwards
184		*/
185	513	public function advance(): void
186		{
187	513	$this->advanceBy(1);
188	513	}
189
190		/**
191		* Move the cursor forwards
192		*
193		* @param int $characters Number of characters to advance by
194		* @param bool $advanceByColumns Whether to advance by columns instead of spaces
195		*/
196	2868	public function advanceBy(int $characters, bool $advanceByColumns = false): void
197		{
198	2868	if ($characters === 0) {
199	2577	$this->previousPosition = $this->currentPosition;
200
201	2577	return;
202		}
203
204	2679	$this->previousPosition = $this->currentPosition;
205	2679	$this->nextNonSpaceCache = null;
206
207		// Optimization to avoid tab handling logic if we have no tabs
208	2679	if (! $this->lineContainsTabs) {
209	2652	$this->advanceWithoutTabCharacters($characters);
210
211	2652	return;
212		}
213
214	51	$nextFewChars = $this->isMultibyte ?
215	6	\mb_substr($this->line, $this->currentPosition, $characters, 'UTF-8') :
216	51	\substr($this->line, $this->currentPosition, $characters);
217
218		// Optimization to avoid tab handling logic if we have no tabs
219	51	if (\strpos($nextFewChars, "\t") === false) {
220	24	$this->advanceWithoutTabCharacters($characters);
221
222	24	return;
223		}
224
225	45	if ($characters === 1 && ! empty($nextFewChars)) {
226	18	$asArray = [$nextFewChars];
227	39	} elseif ($this->isMultibyte) {
228		/** @var string[] $asArray */
229		$asArray = \preg_split('//u', $nextFewChars, -1, \PREG_SPLIT_NO_EMPTY);
230		} else {
231	39	$asArray = \str_split($nextFewChars);
232		}
233
234	45	foreach ($asArray as $relPos => $c) {
235	45	if ($c === "\t") {
236	45	$charsToTab = 4 - ($this->column % 4);
237	45	if ($advanceByColumns) {
238	33	$this->partiallyConsumedTab = $charsToTab > $characters;
239	33	$charsToAdvance = $charsToTab > $characters ? $characters : $charsToTab;
240	33	$this->column += $charsToAdvance;
241	33	$this->currentPosition += $this->partiallyConsumedTab ? 0 : 1;
242	33	$characters -= $charsToAdvance;
243		} else {
244	18	$this->partiallyConsumedTab = false;
245	18	$this->column += $charsToTab;
246	18	$this->currentPosition++;
247	45	$characters--;
248		}
249		} else {
250	12	$this->partiallyConsumedTab = false;
251	12	$this->currentPosition++;
252	12	$this->column++;
253	12	$characters--;
254		}
255
256	45	if ($characters <= 0) {
257	45	break;
258		}
259		}
260	45	}
261
262	2667	private function advanceWithoutTabCharacters(int $characters): void
263		{
264	2667	$length = \min($characters, $this->length - $this->currentPosition);
265	2667	$this->partiallyConsumedTab = false;
266	2667	$this->currentPosition += $length;
267	2667	$this->column += $length;
268
269	2667	return;
270		}
271
272		/**
273		* Advances the cursor by a single space or tab, if present
274		*/
275	390	public function advanceBySpaceOrTab(): bool
276		{
277	390	$character = $this->getCharacter();
278
279	390	if ($character === ' ' \|\| $character === "\t") {
280	378	$this->advanceBy(1, true);
281
282	378	return true;
283		}
284
285	294	return false;
286		}
287
288		/**
289		* Parse zero or more space/tab characters
290		*
291		* @return int Number of positions moved
292		*/
293	2532	public function advanceToNextNonSpaceOrTab(): int
294		{
295	2532	$newPosition = $this->getNextNonSpacePosition();
296	2532	$this->advanceBy($newPosition - $this->currentPosition);
297	2532	$this->partiallyConsumedTab = false;
298
299	2532	return $this->currentPosition - $this->previousPosition;
300		}
301
302		/**
303		* Parse zero or more space characters, including at most one newline.
304		*
305		* Tab characters are not parsed with this function.
306		*
307		* @return int Number of positions moved
308		*/
309	249	public function advanceToNextNonSpaceOrNewline(): int
310		{
311	249	$remainder = $this->getRemainder();
312
313		// Optimization: Avoid the regex if we know there are no spaces or newlines
314	249	if (empty($remainder) \|\| ($remainder[0] !== ' ' && $remainder[0] !== "\n")) {
315	216	$this->previousPosition = $this->currentPosition;
316
317	216	return 0;
318		}
319
320	84	$matches = [];
321	84	\preg_match('/^ (?:\n )?/', $remainder, $matches, \PREG_OFFSET_CAPTURE);
322
323		// [0][0] contains the matched text
324		// [0][1] contains the index of that match
325	84	$increment = $matches[0][1] + \strlen($matches[0][0]);
326
327	84	$this->advanceBy($increment);
328
329	84	return $this->currentPosition - $this->previousPosition;
330		}
331
332		/**
333		* Move the position to the very end of the line
334		*
335		* @return int The number of characters moved
336		*/
337	798	public function advanceToEnd(): int
338		{
339	798	$this->previousPosition = $this->currentPosition;
340	798	$this->nextNonSpaceCache = null;
341
342	798	$this->currentPosition = $this->length;
343
344	798	return $this->currentPosition - $this->previousPosition;
345		}
346
347	2634	public function getRemainder(): string
348		{
349	2634	if ($this->currentPosition >= $this->length) {
350	555	return '';
351		}
352
353	2607	$prefix = '';
354	2607	$position = $this->currentPosition;
355	2607	if ($this->partiallyConsumedTab) {
356	12	$position++;
357	12	$charsToTab = 4 - ($this->column % 4);
358	12	$prefix = \str_repeat(' ', $charsToTab);
359		}
360
361	2607	$subString = $this->isMultibyte ?
362	72	\mb_substr($this->line, $position, null, 'UTF-8') :
363	2607	\substr($this->line, $position);
364
365	2607	return $prefix . $subString;
366		}
367
368	1965	public function getLine(): string
369		{
370	1965	return $this->line;
371		}
372
373	2154	public function isAtEnd(): bool
374		{
375	2154	return $this->currentPosition >= $this->length;
376		}
377
378		/**
379		* Try to match a regular expression
380		*
381		* Returns the matching text and advances to the end of that match
382		*/
383	2352	public function match(string $regex): ?string
384		{
385	2352	$subject = $this->getRemainder();
386
387	2352	if (! \preg_match($regex, $subject, $matches, \PREG_OFFSET_CAPTURE)) {
388	909	return null;
389		}
390
391		// $matches[0][0] contains the matched text
392		// $matches[0][1] contains the index of that match
393
394	2319	if ($this->isMultibyte) {
395		// PREG_OFFSET_CAPTURE always returns the byte offset, not the char offset, which is annoying
396	57	$offset = \mb_strlen(\substr($subject, 0, $matches[0][1]), 'UTF-8');
397	57	$matchLength = \mb_strlen($matches[0][0], 'UTF-8');
398		} else {
399	2262	$offset = $matches[0][1];
400	2262	$matchLength = \strlen($matches[0][0]);
401		}
402
403		// [0][0] contains the matched text
404		// [0][1] contains the index of that match
405	2319	$this->advanceBy($offset + $matchLength);
406
407	2319	return $matches[0][0];
408		}
409
410		/**
411		* Encapsulates the current state of this cursor in case you need to rollback later.
412		*
413		* WARNING: Do not parse or use the return value for ANYTHING except for
414		* passing it back into restoreState(), as the number of values and their
415		* contents may change in any future release without warning.
416		*/
417	1689	public function saveState(): CursorState
418		{
419	1689	return new CursorState([
420	1689	$this->currentPosition,
421	1689	$this->previousPosition,
422	1689	$this->nextNonSpaceCache,
423	1689	$this->indent,
424	1689	$this->column,
425	1689	$this->partiallyConsumedTab,
426		]);
427		}
428
429		/**
430		* Restore the cursor to a previous state.
431		*
432		* Pass in the value previously obtained by calling saveState().
433		*/
434	1596	public function restoreState(CursorState $state): void
435		{
436		[
437	1596	$this->currentPosition,
438	1596	$this->previousPosition,
439	1596	$this->nextNonSpaceCache,
440	1596	$this->indent,
441	1596	$this->column,
442	1596	$this->partiallyConsumedTab,
443	1596	] = $state->toArray();
444	1596	}
445
446	735	public function getPosition(): int
447		{
448	735	return $this->currentPosition;
449		}
450
451	399	public function getPreviousText(): string
452		{
453	399	return \mb_substr($this->line, $this->previousPosition, $this->currentPosition - $this->previousPosition, 'UTF-8');
454		}
455
456	426	public function getSubstring(int $start, ?int $length = null): string
457		{
458	426	if ($this->isMultibyte) {
459	21	return \mb_substr($this->line, $start, $length, 'UTF-8');
460		}
461
462	405	if ($length !== null) {
463	402	return \substr($this->line, $start, $length);
464		}
465
466	3	return \substr($this->line, $start);
467		}
468
469	285	public function getColumn(): int
470		{
471	285	return $this->column;
472		}
473		}
474

thephpleague / commonmark

Push — master ( deae46...6c5f37 )

Cursor::getPreviousText() A

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