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<?php
/**
* PHP Command Line Tools
*
* This source file is subject to the MIT license that is bundled
* with this package in the file LICENSE.
*
* @author James Logsdon <dwarf@girsbrain.org>
* @copyright 2010 James Logsdom (http://girsbrain.org)
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace cli;
/**
* Handles rendering strings. If extra scalar arguments are given after the `$msg`
* the string will be rendered with `sprintf`. If the second argument is an `array`
* then each key in the array will be the placeholder name. Placeholders are of the
* format {:key}.
*
* @param string $msg The message to render.
* @param mixed ...$args Either scalar arguments or a single array argument.
* @return string The rendered string.
*/
function render( $msg, ...$args ) {
return Streams::render( $msg, ...$args );
}
/**
* Shortcut for printing to `STDOUT`. The message and parameters are passed
* through `sprintf` before output.
*
* @param string $msg The message to output in `printf` format.
* @param mixed ...$args Either scalar arguments or a single array argument.
* @return void
* @see \cli\render()
*/
function out( $msg, ...$args ) {
Streams::_call( 'out', func_get_args() );
}
/**
* Pads `$msg` to the width of the shell before passing to `cli\out`.
*
* @param string $msg The message to pad and pass on.
* @param mixed ...$args Either scalar arguments or a single array argument.
* @return void
* @see cli\out()
*/
function out_padded( $msg, ...$args ) {
Streams::_call( 'out_padded', func_get_args() );
}
/**
* Prints a message to `STDOUT` with a newline appended. See `\cli\out` for
* more documentation.
*
* @param string $msg Message to print.
* @param mixed ...$args Either scalar arguments or a single array argument.
* @return void
* @see cli\out()
*/
function line( $msg = '', ...$args ) {
Streams::_call( 'line', func_get_args() );
}
/**
* Shortcut for printing to `STDERR`. The message and parameters are passed
* through `sprintf` before output.
*
* @param string $msg The message to output in `printf` format. With no string,
* a newline is printed.
* @param mixed ...$args Either scalar arguments or a single array argument.
* @return void
*/
function err( $msg = '', ...$args ) {
Streams::_call( 'err', func_get_args() );
}
/**
* Takes input from `STDIN` in the given format. If an end of transmission
* character is sent (^D), an exception is thrown.
*
* @param string $format A valid input format. See `fscanf` for documentation.
* If none is given, all input up to the first newline
* is accepted.
* @return string The input with whitespace trimmed.
* @throws \Exception Thrown if ctrl-D (EOT) is sent as input.
*/
function input( $format = null ) {
return Streams::input( $format );
}
/**
* Displays an input prompt. If no default value is provided the prompt will
* continue displaying until input is received.
*
* @param string $question The question to ask the user.
* @param string|false $default A default value if the user provides no input. Default false.
* @param string $marker A string to append to the question and default value on display.
* @param boolean $hide If the user input should be hidden
* @return string The users input.
* @see cli\input()
*/
function prompt( $question, $default = false, $marker = ': ', $hide = false ) {
return Streams::prompt( $question, $default, $marker, $hide );
}
/**
* Presents a user with a multiple choice question, useful for 'yes/no' type
* questions (which this function defaults too).
*
* @param string $question The question to ask the user.
* @param string $choice
* @param string|null $default The default choice. NULL if a default is not allowed.
* @internal param string $valid A string of characters allowed as a response. Case
* is ignored.
* @return string The users choice.
* @see cli\prompt()
*/
function choose( $question, $choice = 'yn', $default = 'n' ) {
return Streams::choose( $question, $choice, $default );
}
/**
* Does the same as {@see choose()}, but always asks yes/no and returns a boolean
*
* @param string $question The question to ask the user.
* @param bool|null $default The default choice, in a boolean format.
* @return bool
*/
function confirm( $question, $default = false ) {
if ( is_bool( $default ) ) {
$default = $default? 'y' : 'n';
}
$result = choose( $question, 'yn', $default );
return $result == 'y';
}
/**
* Displays an array of strings as a menu where a user can enter a number to
* choose an option. The array must be a single dimension with either strings
* or objects with a `__toString()` method.
*
* @param array<int|string, mixed> $items The list of items the user can choose from.
* @param string $default The index of the default item.
* @param string $title The message displayed to the user when prompted.
* @return string The index of the chosen item.
* @see cli\line()
* @see cli\input()
* @see cli\err()
*/
function menu( $items, $default = null, $title = 'Choose an item' ) {
return Streams::menu( $items, $default, $title );
}
/**
* Attempts an encoding-safe way of getting string length. If intl extension or PCRE with '\X' or mb_string extension aren't
* available, falls back to basic strlen.
*
* @param string $str The string to check.
* @param string|bool $encoding Optional. The encoding of the string. Default false.
* @return int Numeric value that represents the string's length
*/
function safe_strlen( $str, $encoding = false ) {
// Allow for selective testings - "1" bit set tests grapheme_strlen(), "2" preg_match_all( '/\X/u' ), "4" mb_strlen(), "other" strlen().
$test_safe_strlen = (int) getenv( 'PHP_CLI_TOOLS_TEST_SAFE_STRLEN' );
// Assume UTF-8 if no encoding given - `grapheme_strlen()` will return false on failure.
if ( ( ! $encoding || 'UTF-8' === $encoding ) && can_use_icu() && is_int( $length = grapheme_strlen( $str ) ) ) {
if ( ! $test_safe_strlen || ( $test_safe_strlen & 1 ) ) {
return $length;
}
}
// Assume UTF-8 if no encoding given - `preg_match_all()` will return false if given non-UTF-8 string.
if ( ( ! $encoding || 'UTF-8' === $encoding ) && can_use_pcre_x() && false !== ( $length = preg_match_all( '/\X/u', $str, $dummy /*needed for PHP 5.3*/ ) ) ) {
if ( ! $test_safe_strlen || ( $test_safe_strlen & 2 ) ) {
return $length;
}
}
// Legacy encodings and old PHPs will reach here.
if ( function_exists( 'mb_strlen' ) && ( $encoding || function_exists( 'mb_detect_encoding' ) ) ) {
if ( ! $encoding ) {
$encoding = mb_detect_encoding( $str, null, true /*strict*/ );
}
$length = is_string( $encoding ) ? mb_strlen( $str, $encoding ) : mb_strlen( $str ); // mbstring funcs can fail if given `$encoding` arg that evals to false.
if ( 'UTF-8' === $encoding ) {
// Subtract combining characters.
$m_regex = get_unicode_regexs( 'm' );
assert( is_string( $m_regex ) );
$length -= preg_match_all( $m_regex, $str, $dummy /*needed for PHP 5.3*/ );
}
if ( ! $test_safe_strlen || ( $test_safe_strlen & 4 ) ) {
return $length;
}
}
return strlen( $str );
}
/**
* Attempts an encoding-safe way of getting a substring. If intl extension or PCRE with '\X' or mb_string extension aren't
* available, falls back to substr().
*
* @param string $str The input string.
* @param int $start The starting position of the substring.
* @param int|bool|null $length Optional, unless $is_width is set. Maximum length of the substring. Default false. Negative not supported.
* @param int|bool $is_width Optional. If set and encoding is UTF-8, $length (which must be specified) is interpreted as spacing width. Default false.
* @param string|bool $encoding Optional. The encoding of the string. Default false.
* @return bool|string False if given unsupported args, otherwise substring of string specified by start and length parameters
*/
function safe_substr( $str, $start, $length = false, $is_width = false, $encoding = false ) {
// Negative $length or $is_width and $length not specified not supported.
if ( $length < 0 || ( $is_width && ( null === $length || false === $length ) ) ) {
return false;
}
// Need this for normalization below and other uses.
$safe_strlen = safe_strlen( $str, $encoding );
// Normalize `$length` when not specified - PHP 5.3 substr takes false as full length, PHP > 5.3 takes null.
if ( null === $length || false === $length ) {
$length = $safe_strlen;
} else {
$length = (int) $length;
}
// Normalize `$start` - various methods treat this differently.
if ( $start > $safe_strlen ) {
return '';
}
if ( $start < 0 && -$start > $safe_strlen ) {
$start = 0;
}
// Allow for selective testings - "1" bit set tests grapheme_substr(), "2" preg_split( '/\X/' ), "4" mb_substr(), "8" substr().
$test_safe_substr = (int) getenv( 'PHP_CLI_TOOLS_TEST_SAFE_SUBSTR' );
// Assume UTF-8 if no encoding given - `grapheme_substr()` will return false (not null like `grapheme_strlen()`) if given non-UTF-8 string.
if ( ( ! $encoding || 'UTF-8' === $encoding ) && can_use_icu() && false !== ( $try = grapheme_substr( $str, $start, $length ) ) ) {
if ( ! $test_safe_substr || ( $test_safe_substr & 1 ) ) {
return $is_width ? _safe_substr_eaw( $try, $length ) : $try;
}
}
// Assume UTF-8 if no encoding given - `preg_split()` returns a one element array if given non-UTF-8 string (PHP bug) so need to check `preg_last_error()`.
if ( ( ! $encoding || 'UTF-8' === $encoding ) && can_use_pcre_x() ) {
if ( false !== ( $try = preg_split( '/(\X)/u', $str, $safe_strlen + 1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY ) ) && ! preg_last_error() ) {
$try = implode( '', array_slice( $try, $start, $length ) );
if ( ! $test_safe_substr || ( $test_safe_substr & 2 ) ) {
return $is_width ? _safe_substr_eaw( $try, $length ) : $try;
}
}
}
// Legacy encodings and old PHPs will reach here.
if ( function_exists( 'mb_substr' ) && ( $encoding || function_exists( 'mb_detect_encoding' ) ) ) {
if ( ! $encoding ) {
$encoding = mb_detect_encoding( $str, null, true /*strict*/ );
}
// Bug: not adjusting for combining chars.
$try = is_string( $encoding ) ? mb_substr( $str, $start, $length, $encoding ) : mb_substr( $str, $start, $length ); // mbstring funcs can fail if given `$encoding` arg that evals to false.
if ( 'UTF-8' === $encoding && $is_width ) {
$try = _safe_substr_eaw( $try, $length );
}
if ( ! $test_safe_substr || ( $test_safe_substr & 4 ) ) {
return $try;
}
}
return substr( $str, $start, $length );
}
/**
* Internal function used by `safe_substr()` to adjust for East Asian double-width chars.
*
* @param string $str
* @param int $length
* @return string
*/
function _safe_substr_eaw( $str, $length ) {
// Set the East Asian Width regex.
$eaw_regex = get_unicode_regexs( 'eaw' );
assert( is_string( $eaw_regex ) );
// If there's any East Asian double-width chars...
if ( preg_match( $eaw_regex, $str ) ) {
// Note that if the length ends in the middle of a double-width char, the char is excluded, not included.
// See if it's all EAW.
if ( function_exists( 'mb_substr' ) && preg_match_all( $eaw_regex, $str, $dummy /*needed for PHP 5.3*/ ) === $length ) {
// Just halve the length so (rounded down to a minimum of 1).
$str = mb_substr( $str, 0, max( (int) ( $length / 2 ), 1 ), 'UTF-8' );
} else {
// Explode string into an array of UTF-8 chars. Based on core `_mb_substr()` in "wp-includes/compat.php".
$chars = preg_split( '/([\x00-\x7f\xc2-\xf4][^\x00-\x7f\xc2-\xf4]*)/', $str, $length + 1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY );
if ( false === $chars ) {
$chars = array( $str );
}
$cnt = min( count( $chars ), $length );
$width = $length;
for ( $length = 0; $length < $cnt && $width > 0; $length++ ) {
$width -= preg_match( $eaw_regex, $chars[ $length ] ) ? 2 : 1;
}
// Round down to a minimum of 1.
if ( $width < 0 && $length > 1 ) {
$length--;
}
return join( '', array_slice( $chars, 0, $length ) );
}
}
return $str;
}
/**
* An encoding-safe way of padding string length for display
*
* @param string $string The string to pad.
* @param int $length The length to pad it to.
* @param string|bool $encoding Optional. The encoding of the string. Default false.
* @return string
*/
function safe_str_pad( $string, $length, $encoding = false ) {
$real_length = strwidth( $string, $encoding );
$diff = strlen( $string ) - $real_length;
$length += $diff;
return str_pad( $string, $length );
}
/**
* Get width of string, ie length in characters, taking into account multi-byte and mark characters for UTF-8, and multi-byte for non-UTF-8.
*
* @param string $string The string to check.
* @param string|bool $encoding Optional. The encoding of the string. Default false.
* @return int The string's width.
*/
function strwidth( $string, $encoding = false ) {
$string = (string) $string;
// Set the East Asian Width and Mark regexs.
$regexs = get_unicode_regexs();
assert( is_array( $regexs ) );
list( $eaw_regex, $m_regex ) = $regexs;
// Allow for selective testings - "1" bit set tests grapheme_strlen(), "2" preg_match_all( '/\X/u' ), "4" mb_strwidth(), "other" safe_strlen().
$test_strwidth = (int) getenv( 'PHP_CLI_TOOLS_TEST_STRWIDTH' );
// Assume UTF-8 if no encoding given - `grapheme_strlen()` will return null if given non-UTF-8 string.
if ( ( ! $encoding || 'UTF-8' === $encoding ) && can_use_icu() && null !== ( $width = grapheme_strlen( $string ) ) ) {
if ( ! $test_strwidth || ( $test_strwidth & 1 ) ) {
return $width + preg_match_all( $eaw_regex, $string, $dummy /*needed for PHP 5.3*/ );
}
}
// Assume UTF-8 if no encoding given - `preg_match_all()` will return false if given non-UTF-8 string.
if ( ( ! $encoding || 'UTF-8' === $encoding ) && can_use_pcre_x() && false !== ( $width = preg_match_all( '/\X/u', $string, $dummy /*needed for PHP 5.3*/ ) ) ) {
if ( ! $test_strwidth || ( $test_strwidth & 2 ) ) {
return $width + preg_match_all( $eaw_regex, $string, $dummy /*needed for PHP 5.3*/ );
}
}
// Legacy encodings and old PHPs will reach here.
if ( function_exists( 'mb_strwidth' ) && ( $encoding || function_exists( 'mb_detect_encoding' ) ) ) {
if ( ! $encoding ) {
$encoding = mb_detect_encoding( $string, null, true /*strict*/ );
}
$width = is_string( $encoding ) ? mb_strwidth( $string, $encoding ) : mb_strwidth( $string ); // mbstring funcs can fail if given `$encoding` arg that evals to false.
if ( 'UTF-8' === $encoding ) {
// Subtract combining characters.
$width -= preg_match_all( $m_regex, $string, $dummy /*needed for PHP 5.3*/ );
}
if ( ! $test_strwidth || ( $test_strwidth & 4 ) ) {
return $width;
}
}
return safe_strlen( $string, $encoding );
}
/**
* Returns whether ICU is modern enough not to flake out.
*
* @return bool
*/
function can_use_icu() {
static $can_use_icu = null;
if ( null === $can_use_icu ) {
// Choosing ICU 54, Unicode 7.0.
$can_use_icu = defined( 'INTL_ICU_VERSION' ) && version_compare( INTL_ICU_VERSION, '54.1', '>=' ) && function_exists( 'grapheme_strlen' ) && function_exists( 'grapheme_substr' );
}
return $can_use_icu;
}
/**
* Returns whether PCRE Unicode extended grapheme cluster '\X' is available for use.
*
* @return bool
*/
function can_use_pcre_x() {
static $can_use_pcre_x = null;
if ( null === $can_use_pcre_x ) {
// '\X' introduced (as Unicode extended grapheme cluster) in PCRE 8.32 - see https://vcs.pcre.org/pcre/code/tags/pcre-8.32/ChangeLog?view=markup line 53.
// Older versions of PCRE were bundled with PHP <= 5.3.23 & <= 5.4.13.
$pcre_version = substr( PCRE_VERSION, 0, strspn( PCRE_VERSION, '0123456789.' ) ); // Remove any trailing date stuff.
$can_use_pcre_x = version_compare( $pcre_version, '8.32', '>=' ) && false !== @preg_match( '/\X/u', '' );
}
return $can_use_pcre_x;
}
/**
* Get the regexs generated from Unicode data.
*
* @param string|null $idx Optional. Return a specific regex only. Default null.
* @return array<int, string>|string Returns keyed array if not given $idx or $idx doesn't exist, otherwise the specific regex string.
*/
function get_unicode_regexs( $idx = null ) {
static $eaw_regex; // East Asian Width regex. Characters that count as 2 characters as they're "wide" or "fullwidth". See http://www.unicode.org/reports/tr11/tr11-19.html
static $m_regex; // Mark characters regex (Unicode property "M") - mark combining "Mc", mark enclosing "Me" and mark non-spacing "Mn" chars that should be ignored for spacing purposes.
if ( null === $eaw_regex ) {
// Load both regexs generated from Unicode data.
require __DIR__ . '/unicode/regex.php';
}
if ( null !== $idx ) {
if ( 'eaw' === $idx ) {
return $eaw_regex;
}
if ( 'm' === $idx ) {
return $m_regex;
}
}
return array( $eaw_regex, $m_regex, );
}
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