[elpa] externals/ilist 4fb5695fe1 09/24: Add manuals and update README

[ELPA Syncer]

branch: externals/ilist
commit 4fb5695fe1cb6fb75901fbf542d26e0b2614bca9
Author: JSDurand <mmemmew@gmail.com>
Commit: JSDurand <mmemmew@gmail.com>

    Add manuals and update README
    
    Add Info and PDF manuals.  Also update the README.org a bit.
---
 README.org    |  19 +-
 ilist.info    | 734 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 ilist.pdf     | Bin 0 -> 166367 bytes
 ilist.texinfo | 244 +++++++++++++++++++
 4 files changed, 990 insertions(+), 7 deletions(-)

diff --git a/README.org b/README.org
index cb060d07f0..bb9c2de9d5 100644
--- a/README.org
+++ b/README.org
@@ -15,12 +15,18 @@ The one main function this package provides is 
=ilist-string=.  It is
 called as follows.
 
 #+begin_src emacs-lisp :eval no :exports code
-(ilist-string LIST COLUMNS GROUPS DISCARD-EMPTY-P)
+  (ilist-string LIST COLUMNS GROUPS DISCARD-EMPTY-P
+                SORTER NO-TRAILING-SPACE)
 #+end_src
 
-Here the LIST is the list that the user wants to display.
-
-And DISCARD-EMPTY-P determines whether to display empty groups or not.
+- LIST is the list that the user wants to display
+- COLUMNS and GROUPS are described in the following sections
+- DISCARD-EMPTY-P determines whether to display empty groups or not
+- SORTER is either nil, or a function with two arguments which returns
+  non-nil if and only if the first argument should be sorted before
+  the second argument
+- NO-TRAILING-SPACE is non-nil if the function should not produce
+  trailing whitespaces
 
 ** Columns
 
@@ -31,8 +37,7 @@ comprises the following specifications:
 - FUN: A function that will be given the elements of the list (one at
   a time) that should return a string as the representation of that
   element in this column.
-- MIN: The minimal number of width this column takes.
-- MAX
+- MIN, MAX: The minimal (resp. maximal) width this column takes.
 - ALIGN: Either :left, :right, or :center.  How the contents of the
   column are aligned.
 - ELIDE: If the content of an element takes more space than the MAX,
@@ -40,7 +45,7 @@ comprises the following specifications:
   fixed "eliding string".  If this ELIDE is not a string, then it
   means not to elide, but to truncate the contents.
 
-**  GROUPS
+**  Groups
 
 *** Fixed groups
 
diff --git a/ilist.info b/ilist.info
new file mode 100644
index 0000000000..4ce216e8fb
--- /dev/null
+++ b/ilist.info
@@ -0,0 +1,734 @@
+This is ilist.info, produced by makeinfo version 6.8 from ilist.texinfo.
+
+Display a list in an Ibuffer way.
+
+   Copyright (C) 2021 Durand
+
+     Permission is granted to copy, distribute and/or modify this
+     document under the terms of the GNU Free Documentation License,
+     Version 1.3 or any later version published by the Free Software
+     Foundation; with no Invariant Sections, no Front-Cover Texts, and
+     no Back-Cover Texts.  A copy of the license is included in the
+     section entitled "GNU Free Documentation License".
+
+     A copy of the license is also available from the Free Software
+     Foundation Web site at <https://www.gnu.org/licenses/fdl.html>.
+
+   The document was typeset with GNU Texinfo
+(https://www.gnu.org/software/texinfo/).
+
+
+File: ilist.info,  Node: Top,  Next: About,  Prev: (dir),  Up: (dir)
+
+IList
+*****
+
+Display a list in an Ibuffer way.
+
+   Copyright (C) 2021 Durand
+
+     Permission is granted to copy, distribute and/or modify this
+     document under the terms of the GNU Free Documentation License,
+     Version 1.3 or any later version published by the Free Software
+     Foundation; with no Invariant Sections, no Front-Cover Texts, and
+     no Back-Cover Texts.  A copy of the license is included in the
+     section entitled "GNU Free Documentation License".
+
+     A copy of the license is also available from the Free Software
+     Foundation Web site at <https://www.gnu.org/licenses/fdl.html>.
+
+   The document was typeset with GNU Texinfo
+(https://www.gnu.org/software/texinfo/).
+
+* Menu:
+
+* About::
+* Entry point::
+* Mapping over lines::
+* Moving::
+* Copying This Manual::
+* Index::
+
+
+File: ilist.info,  Node: About,  Next: Entry point,  Prev: Top,  Up: Top
+
+1 About
+*******
+
+This is a little library package that can _display a list in an Ibuffer
+fashion_.  The core functionality it provides is a function that can
+accept a list, and produce a string showing the contents of the list
+according to the specifications of columns, groups, and sorters.
+
+
+File: ilist.info,  Node: Entry point,  Next: Mapping over lines,  Prev: About, 
 Up: Top
+
+2 Entry point
+*************
+
+The one main function this package provides is 'ilist-string'.  It is
+called as follows.
+
+     (ilist-string LIST COLUMNS GROUPS DISCARD-EMPTY-P)
+
+'LIST'
+     This denotes the list that the user wants to display.
+'COLUMNS'
+'GROUPS'
+     They are described in the following sections.
+'DISCARD-EMPTY-P'
+     This determines whether to display empty groups or not.
+'SORTER'
+     This is either nil, or a function with two arguments which returns
+     non-nil if and only if the first argument should be sorted before
+     the second argument.
+'NO-TRAILING-SPACE'
+     This is non-nil if the function should not produce trailing
+     whitespaces.
+
+* Menu:
+
+* Columns::
+* Groups::
+
+
+File: ilist.info,  Node: Columns,  Next: Groups,  Prev: Entry point,  Up: 
Entry point
+
+2.1 Columns
+===========
+
+Like in Ibuffer, the user can specify columns to display.  Each column
+comprises the following specifications:
+
+'NAME'
+     The name to display in the header.
+'FUN'
+     A function that will be given the elements of the list (one at a
+     time) that should return a string as the representation of that
+     element in this column.
+'MIN'
+'MAX'
+     The minimal (resp.  maximal) width this column takes.
+'ALIGN'
+     Either :left, :right, or :center.  How the contents of the column
+     are aligned.
+'ELIDE'
+     If the content of an element takes more space than the MAX, whether
+     to substitute the last few characters of that content by a fixed
+     _eliding string_.  If this ELIDE is not a string, then it means not
+     to elide, but to truncate the contents.
+
+
+File: ilist.info,  Node: Groups,  Prev: Columns,  Up: Entry point
+
+2.2 Groups
+==========
+
+The first subsection of this section describes the specifications of
+groups.  And the second describes a planned feature that is not yet
+implemented.
+
+* Menu:
+
+* Fixed groups::
+* Automatic groups (planned)::
+
+
+File: ilist.info,  Node: Fixed groups,  Next: Automatic groups (planned),  
Prev: Groups,  Up: Groups
+
+2.2.1 Fixed groups
+------------------
+
+Like in Ibuffer, we can group elements together in the display.  One
+difference with Ibuffer is that elements that are not in any group are
+ignored.  If one wants a "default" group, specify that explicitly.  The
+specifications of GROUPS are as follows.
+
+'NAME'
+     The name of the group.  This will be enclosed in square brackets
+     and displayed on a separate line.
+'FUN'
+     A function with one argument.  If the function returns non-nil,
+     then that element is considered to pertain to the group.
+
+   So a default group just uses a function that always returns 't', and
+is put at the end of the list 'GROUPS'.
+
+   Empty groups might or might not be displayed, depending on the value
+of 'DISCARD-EMPTY-P'.
+
+
+File: ilist.info,  Node: Automatic groups (planned),  Prev: Fixed groups,  Up: 
Groups
+
+2.2.2 Automatic groups (planned)
+--------------------------------
+
+I plan to add support for automatic groups.  This means that, instead of
+providing a list of groups, one provides a function with one argument.
+That argument will be fed the list of elements.  Then the function is
+supposed to return a list of the following form:
+
+     (list
+      (NAME
+       (INDEX1 . ELEMENT1)
+       (INDEX2 . ELEMENT2)
+       ...)
+      ...)
+
+   That is, it should return cons cells of indices and elements, where
+the indices mean the indices of the corresponding element, in the
+original list.
+
+   Then the user can provide functions to automatically group elements
+based on the criteria that fit the domain of application.
+
+
+File: ilist.info,  Node: Mapping over lines,  Next: Moving,  Prev: Entry 
point,  Up: Top
+
+3 Mapping over lines
+********************
+
+For the convenience of package-users, this package also provides some
+auxiliary functions to operate on the displayed list.  One is
+'ilist-map-lines'.  It is called as follows.
+
+     (ilist-map-lines FUN PREDICATE START END)
+
+'FUN'
+     The function to execute on each matching line.
+'PREDICATE'
+     This should be a function with no arguments.  It will be executed
+     on each line.  If it returns non-nil, that line is considered to be
+     matched.
+'START'
+'END'
+     They limit the range of the mapping.
+
+
+File: ilist.info,  Node: Moving,  Next: Copying This Manual,  Prev: Mapping 
over lines,  Up: Top
+
+4 Moving
+********
+
+It might be desired to move between the displayed list items in a
+_cyclic_ manner, that is, assuming the top of the buffer is identified
+with the bottom of the buffer.  So the package provides four functions
+for moving.
+
+'ilist-backward-line'
+'ilist-forward-line'
+     Move between lines.  One can control whether to skip group headers
+     or to move cyclicly, through the function parameters.
+'ilist-backward-group-header'
+'ilist-forward-group-header'
+     Move between group headers.
+
+
+File: ilist.info,  Node: Copying This Manual,  Next: Index,  Prev: Moving,  
Up: Top
+
+Appendix A Copying This Manual
+******************************
+
+                     Version 1.3, 3 November 2008
+
+     Copyright (C) 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+     <https://fsf.org/>
+
+     Everyone is permitted to copy and distribute verbatim copies
+     of this license document, but changing it is not allowed.
+
+  0. PREAMBLE
+
+     The purpose of this License is to make a manual, textbook, or other
+     functional and useful document "free" in the sense of freedom: to
+     assure everyone the effective freedom to copy and redistribute it,
+     with or without modifying it, either commercially or
+     noncommercially.  Secondarily, this License preserves for the
+     author and publisher a way to get credit for their work, while not
+     being considered responsible for modifications made by others.
+
+     This License is a kind of "copyleft", which means that derivative
+     works of the document must themselves be free in the same sense.
+     It complements the GNU General Public License, which is a copyleft
+     license designed for free software.
+
+     We have designed this License in order to use it for manuals for
+     free software, because free software needs free documentation: a
+     free program should come with manuals providing the same freedoms
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+     recommend this License principally for works whose purpose is
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+
+  1. APPLICABILITY AND DEFINITIONS
+
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+
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+
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+
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+
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+
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+
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+  4. MODIFICATIONS
+
+     You may copy and distribute a Modified Version of the Document
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+
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+
+       B. List on the Title Page, as authors, one or more persons or
+          entities responsible for authorship of the modifications in
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+          principal authors of the Document (all of its principal
+          authors, if it has fewer than five), unless they release you
+          from this requirement.
+
+       C. State on the Title page the name of the publisher of the
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+
+       D. Preserve all the copyright notices of the Document.
+
+       E. Add an appropriate copyright notice for your modifications
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+
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+          notice giving the public permission to use the Modified
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+
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+          license notice.
+
+       H. Include an unaltered copy of this License.
+
+       I. Preserve the section Entitled "History", Preserve its Title,
+          and add to it an item stating at least the title, year, new
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+  5. COMBINING DOCUMENTS
+
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+
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+
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+     must delete all sections Entitled "Endorsements."
+
+  6. COLLECTIONS OF DOCUMENTS
+
+     You may make a collection consisting of the Document and other
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+
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+
+  7. AGGREGATION WITH INDEPENDENT WORKS
+
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+
+  8. TRANSLATION
+
+     Translation is considered a kind of modification, so you may
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+       under the terms of the GNU Free Documentation License, Version 1.3
+       or any later version published by the Free Software Foundation;
+       with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
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+   If you have Invariant Sections, Front-Cover Texts and Back-Cover
+Texts, replace the "with...Texts." line with this:
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+         being LIST.
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+
+File: ilist.info,  Node: Index,  Prev: Copying This Manual,  Up: Top
+
+Index
+*****
+
+
+
+Tag Table:
+Node: Top764
+Node: About1643
+Node: Entry point2012
+Node: Columns2809
+Node: Groups3694
+Node: Fixed groups3995
+Node: Automatic groups (planned)4854
+Node: Mapping over lines5658
+Node: Moving6304
+Node: Copying This Manual6911
+Node: Index32019
+
+End Tag Table
+
+
+Local Variables:
+coding: utf-8
+End:
diff --git a/ilist.pdf b/ilist.pdf
new file mode 100644
index 0000000000..ca2df0b8d7
Binary files /dev/null and b/ilist.pdf differ
diff --git a/ilist.texinfo b/ilist.texinfo
new file mode 100644
index 0000000000..141b7b78ac
--- /dev/null
+++ b/ilist.texinfo
@@ -0,0 +1,244 @@
+\input texinfo   @c -*-texinfo-*-
+@c %**start of header
+@setfilename ilist.info
+@settitle IList
+@c %**end of header
+@copying
+Display a list in an Ibuffer way.
+
+Copyright @copyright{} 2021  Durand
+
+@quotation
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled ``GNU
+Free Documentation License''.
+
+A copy of the license is also available from the Free Software
+Foundation Web site at @url{https://www.gnu.org/licenses/fdl.html}.
+
+@end quotation
+
+The document was typeset with
+@uref{https://www.gnu.org/software/texinfo/, GNU Texinfo}.
+
+@end copying
+
+@titlepage
+@title IList
+@subtitle Display a list in an Ibuffer way.
+@author Durand <mmemmew@@gmail.com>
+@page
+@vskip 0pt plus 1filll
+@insertcopying
+@end titlepage
+
+@c Output the table of the contents at the beginning.
+@contents
+
+@ifnottex
+@node Top, About, (dir), (dir)
+@top IList
+
+@insertcopying
+@end ifnottex
+
+@c Generate the nodes for this menu with `C-c C-u C-m'.
+@menu
+* About::
+* Entry point::
+* Mapping over lines::
+* Moving::
+* Copying This Manual::
+* Index::
+@end menu
+
+@c Update all node entries with `C-c C-u C-n'.
+@c Insert new nodes with `C-c C-c n'.
+@node About, Entry point, Top, Top
+@chapter About
+
+This is a little library package that can @emph{display a list in an
+Ibuffer fashion}.  The core functionality it provides is a function that
+can accept a list, and produce a string showing the contents of the list
+according to the specifications of columns, groups, and sorters.
+
+@node Entry point, Mapping over lines, About, Top
+@comment  node-name,  next,  previous,  up
+@chapter Entry point
+
+The one main function this package provides is @code{ilist-string}.
+It is called as follows.
+
+@lisp
+(ilist-string LIST COLUMNS GROUPS DISCARD-EMPTY-P)
+@end lisp
+
+@table @code
+@item LIST
+This denotes the list that the user wants to display.
+@item COLUMNS
+@itemx GROUPS
+They are described in the following sections.
+@item DISCARD-EMPTY-P
+This determines whether to display empty groups or not.
+@item SORTER
+This is either nil, or a function with two arguments which returns
+non-nil if and only if the first argument should be sorted before the
+second argument.
+@item NO-TRAILING-SPACE
+This is non-nil if the function should not produce trailing
+whitespaces.
+@end table
+
+@menu
+* Columns::
+* Groups::
+@end menu
+
+@node Columns, Groups, Entry point, Entry point
+@comment  node-name,  next,  previous,  up
+@section Columns
+
+Like in Ibuffer, the user can specify columns to display.  Each column
+comprises the following specifications:
+
+@table @code
+@item NAME
+The name to display in the header.
+@item FUN
+A function that will be given the elements of the list (one at a time)
+that should return a string as the representation of that element in
+this column.
+@item MIN
+@itemx MAX
+The minimal (resp. maximal) width this column takes.
+@item ALIGN
+Either :left, :right, or :center.  How the contents of the column are
+aligned.
+@item ELIDE
+If the content of an element takes more space than the MAX, whether to
+substitute the last few characters of that content by a fixed
+@emph{eliding string}.  If this ELIDE is not a string, then it means
+not to elide, but to truncate the contents.
+@end table
+
+@node Groups,  , Columns, Entry point
+@comment  node-name,  next,  previous,  up
+@section Groups
+
+The first subsection of this section describes the specifications of
+groups.  And the second describes a planned feature that is not yet
+implemented.
+
+@menu
+* Fixed groups::
+* Automatic groups (planned)::
+@end menu
+
+@node Fixed groups, Automatic groups (planned), Groups, Groups
+@comment  node-name,  next,  previous,  up
+@subsection Fixed groups
+
+Like in Ibuffer, we can group elements together in the display.  One
+difference with Ibuffer is that elements that are not in any group are
+ignored.  If one wants a "default" group, specify that explicitly.
+The specifications of GROUPS are as follows.
+
+@table @code
+@item NAME
+The name of the group.  This will be enclosed in square brackets and
+displayed on a separate line.
+@item FUN
+A function with one argument.  If the function returns non-nil, then
+that element is considered to pertain to the group.
+@end table
+
+So a default group just uses a function that always returns @code{t},
+and is put at the end of the list @code{GROUPS}.
+
+Empty groups might or might not be displayed, depending on the value
+of @code{DISCARD-EMPTY-P}.
+
+@node Automatic groups (planned),  , Fixed groups, Groups
+@comment  node-name,  next,  previous,  up
+@subsection Automatic groups (planned)
+
+I plan to add support for automatic groups.  This means that, instead
+of providing a list of groups, one provides a function with one
+argument.  That argument will be fed the list of elements.  Then the
+function is supposed to return a list of the following form:
+
+@lisp
+(list
+ (NAME
+  (INDEX1 . ELEMENT1)
+  (INDEX2 . ELEMENT2)
+  ...)
+ ...)
+@end lisp
+
+That is, it should return cons cells of indices and elements, where
+the indices mean the indices of the corresponding element, in the
+original list.
+
+Then the user can provide functions to automatically group elements
+based on the criteria that fit the domain of application.
+
+@node Mapping over lines, Moving, Entry point, Top
+@comment  node-name,  next,  previous,  up
+@chapter Mapping over lines
+
+For the convenience of package-users, this package also provides some
+auxiliary functions to operate on the displayed list.  One is
+@code{ilist-map-lines}.  It is called as follows.
+
+@lisp
+(ilist-map-lines FUN PREDICATE START END)
+@end lisp
+
+@table @code
+@item FUN
+The function to execute on each matching line.
+@item PREDICATE
+This should be a function with no arguments.  It will be executed on
+each line.  If it returns non-nil, that line is considered to be
+matched.
+@item START
+@itemx END
+They limit the range of the mapping.
+@end table
+
+@node Moving, Copying This Manual, Mapping over lines, Top
+@comment  node-name,  next,  previous,  up
+@chapter Moving
+
+It might be desired to move between the displayed list items in a
+@emph{cyclic} manner, that is, assuming the top of the buffer is
+identified with the bottom of the buffer.  So the package provides
+four functions for moving.
+
+@table @code
+@item ilist-backward-line
+@itemx ilist-forward-line
+Move between lines.  One can control whether to skip group headers or
+to move cyclicly, through the function parameters.
+@item ilist-backward-group-header
+@itemx ilist-forward-group-header
+Move between group headers.
+@end table
+
+@node Copying This Manual, Index, Moving, Top
+@appendix Copying This Manual
+
+@c Get fdl.texi from https://www.gnu.org/licenses/fdl.html
+@include fdl-1.3.texi
+
+@node Index,  , Copying This Manual, Top
+@unnumbered Index
+
+@printindex cp
+
+@bye