bug#11759: 24.1.50; word-wrap should wrap on non-words if the current word is too long

[Ivan Andrus]

Setting word-wrap is generally a very nice addition and I like it even
when programming.  However it can cause annoying behavior when the
"words" are very long.  For example if the entire line is one "word" but
indented, which is not uncommon in some files that I regularly edit,
then the entire line is wrapped to the next line leaving a completely
blank visual line.  Arguably this is bad programming style, but it would
be nice if I could specify a maximum length for a "word".  If it would
require breaking longer than this limit, then it should break as if
word-wrap were off.

Below is a contrived example of what can cause problems when the buffer
is not sufficiently wide.

    
this.long_method_name().another_method().what_an_impossibly_long_method_with_lots_of_arguments(1,2,3,4,[4,5,6,7,8,9]).and_no_spaces()

Thank,
Ivan

In GNU Emacs 24.1.50.1 (i386-apple-darwin10.8.0, NS apple-appkit-1038.36)
of 2012-06-19 on oroszlan.local
Bzr revision: 108664 eggert@cs.ucla.edu-20120619185739-mile4zpnjrqz5e8e
Windowing system distributor `Apple', version 10.3.1038
Configured using:
`configure '--with-ns' '-C''

Important settings:
  value of $EMACSDATA: 
/Users/gvol/vcs/emacs/local/nextstep/Emacs.app/Contents/Resources/etc
  value of $EMACSDOC: 
/Users/gvol/vcs/emacs/local/nextstep/Emacs.app/Contents/Resources/etc
  value of $EMACSLOADPATH: 
/Users/gvol/vcs/emacs/local/nextstep/Emacs.app/Contents/Resources/site-lisp:/Users/gvol/vcs/emacs/local/nextstep/Emacs.app/Contents/Resources/lisp:/Users/gvol/vcs/emacs/local/nextstep/Emacs.app/Contents/Resources/leim
  value of $EMACSPATH: 
/Users/gvol/vcs/emacs/local/nextstep/Emacs.app/Contents/MacOS/libexec:/Users/gvol/vcs/emacs/local/nextstep/Emacs.app/Contents/MacOS/bin
  locale-coding-system: nil
  default enable-multibyte-characters: t

Major mode: Org

Minor modes in effect:
  diff-auto-refine-mode: t
  reveal-mode: t
  drag-stuff-global-mode: t
  TeX-PDF-mode: t
  which-function-mode: t
  show-paren-mode: t
  recentf-mode: t
  msb-mode: t
  minibuffer-depth-indicate-mode: t
  ido-everywhere: t
  global-hl-line-mode: t
  delete-selection-mode: t
  auto-image-file-mode: t
  auto-insert-mode: t
  yas/global-mode: t
  yas/minor-mode: t
  shell-dirtrack-mode: t
  global-visible-mark-mode: t
  visible-mark-mode: t
  gvol-mode: t
  desktop-save-mode: t
  command-frequency-autosave-mode: t
  command-frequency-mode: t
  itunes-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
v v F i x e d SPC a SPC f e w SPC t h i n g s SPC r
e SPC t h e SPC n e w SPC C-u C-u <C-backspace> w r
t SPC C-e p y t h o n . e l C-u C-u C-u <C-backspace>
C-/ C-c C-c <C-tab> g <C-tab> <C-tab> q M-w g <C-tab>
C-x v d <return> = C-c C-w C-. C-. C-. <C-tab> v q
M-w M-w <C-tab> M-x v c - r e v <tab> e r <tab> <return>
y e <return> y e s <return> <C-tab> C-c C-f <C-tab>
C-3 C-e <C-tab> M-w C-x C-f C-d g p <return> C-c C-f
M-w n n n s-o * . e l c <return> D y e s <return> n
<return> C-c C-f M-w n <return> C-c C-f M-w n <return>
C-c C-f M-w n <return> M-w n <return> C-c C-f M-w n
<return> C-c C-f <C-tab> TAB TAB TAB M-k M-k M-k M-w
<C-tab> M-w n <return> C-c C-f M-w n <return> C-c C-f
M-w <down-mouse-1> <mouse-1> C-k C-k C-k C-k C-M-o
C-M-j <wheel-down> <down-mouse-1> <mouse-1> <wheel-down>
<double-wheel-down> <triple-wheel-down> <wheel-down>
<wheel-down> <wheel-down> C-x C-c n C-g q M-w C-x r
j p C-g C-x r j b C-s p a t h C-s C-s C-o C-o C-o C-o
C-o C-o C-o C-o C-o C-o C-o C-o C-o C-k C-k C-k C-k
C-k C-k C-k C-k TAB TAB TAB TAB TAB TAB TAB TAB TAB
C-s C-w M-o C-a C-s o n o C-s C-s C-a <C-tab> q <C-tab>
q q q g p p p p p p p p p p p p p p p d x y e s <return>
<C-tab> q g M-w <C-tab> M-w M-x r e p o r <tab> <r
eturn>

Recent messages:
/Users/gvol/.passwords.gpg
Entering debugger...
Mark saved where search started
Searched 1 buffer; 29 matches for `path'
Mark saved where search started [2 times]
Back to top level.
NOTE: Deletion of files flagged `D' (not those marked `*')
Deleting...done
/Users/gvol/.bashrc
/Users/gvol/.emacs-uptimes

Load-path shadows:
/Users/gvol/.emacs.d/elpa/parenface-20091203/parenface hides 
~/.emacs.d/local/parenface
/Users/gvol/.emacs.d/elpa/hl-sexp-1.0.0/hl-sexp hides ~/.emacs.d/local/hl-sexp
/Users/gvol/.emacs.d/elpa/python-mode-6.0.3/highlight-indentation hides 
~/.emacs.d/local/highlight-indentation
/Users/gvol/.emacs.d/elpa/command-frequency-1.1/command-frequency hides 
~/.emacs.d/local/command-frequency
/Users/gvol/vcs/sage-mode/emacs/.dir-locals hides 
/Users/gvol/vcs/emacs/local/nextstep/Emacs.app/Contents/Resources/lisp/gnus/.dir-locals
~/.emacs.d/local/lisp-mnt hides 
/Users/gvol/vcs/emacs/local/nextstep/Emacs.app/Contents/Resources/lisp/emacs-lisp/lisp-mnt

Features:
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mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader
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smex-autoloads speck-autoloads swank-clojure-autoloads
clojure-mode-autoloads slime-repl-autoloads slime-autoloads
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paren recentf tree-widget wid-edit msb mb-depth ido icomplete hl-line
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calendar cal-loaddefs warnings autoinsert yasnippet dropdown-list
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add-log vc ediff vc-dispatcher sage cl-macs cl macroexp cl-lib rx xml
desktop backtr command-frequency uptimes pp server easy-mmode assoc
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cus-face files text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget hashtable-print-readable backquote
make-network-process ns multi-tty emacs)