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bug#484: Font bug in 22 (Carbon): default "Monaco" has wrong (frame-char


From: David Reitter
Subject: bug#484: Font bug in 22 (Carbon): default "Monaco" has wrong (frame-char-width)
Date: Wed, 25 Jun 2008 19:23:21 +0100

I think there's a font bug in Emacs 22 (CVS), Carbon.

To reproduce:

Start Emacs -Q
(frame-width)  (evaluates to 80)
(frame-char-width)  (evaluates to 7)
(mac-font-panel-mode)
[select 14pt in the default Monaco font] (note that the frame does not resize in width)

(frame-width)  (evaluates to 80  - wrong!)
(frame-char-width)  (evaluates to 7 - wrong!)

When you select Monaco 18, the frame gets wider as intended (still a bad design choice), but (frame-width) is 81, which is too high. (/ (frame-pixel-width) (frame-char-width)) evaluates to 85. (frame- pixel-width) is correct, so I assume that (frame-char-width) is wrong.

Concrete use case:

Start Emacs -Q
(setq longlines-wrap-follows-window-size t)
[enter text with several words in a line that is longer than the window width, i.e. gets wrapped]
(mac-font-panel-mode)
select 14 point (in the default "Monaco")
(longlines-mode)

--> lines will be wrapped too late.


I don't notice such problems with other fonts.


The original bug report by address@hidden read:
====

Dear David,

There appears to be a bug in the latest Aquamacs version. If one tries to wrap the text (ALT+Q) with fontsize different from 12, one gets mostly garbage.

Best Wishes,
Christoph







In GNU Emacs 22.2.50.2 (i386-apple-darwin9.2.2, Carbon Version 1.6.0)
 of 2008-06-23 on plume.sr.unh.edu
Windowing system distributor `Apple Inc.', version 10.5.3
configured using `configure  '--without-x' '--prefix=/usr/local''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: iso-8859-1
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  longlines-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  use-hard-newlines: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
<help-echo> <down-mouse-1> <mouse-1> <help-echo> C-x
b <return> <help-echo> <help-echo> <help-echo> <down-mouse-1>
<mouse-1> C-y <up> <up> <down> <down> <escape> x l
o n g l <tab> <return> <escape> x m a c - f o <tab>
<return> <help-echo> <down-mouse-1> <mouse-1> <return>
<return> <up> ( s e t q SPC l o n g l i n e s - w r
a p - f o l l o w s - w i n d o w - s i z e SPC t )
C-x C-e <return> <return> <escape> x l o n g l <tab>
m <tab> <return> <escape> x <up> <return> <help-echo>
<help-echo> <help-echo> <help-echo> <down> <up> x l
o n g l <tab> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <escape> x l o n g l <tab>
m o <tab> <return> <escape> x <up> <return> <menu-bar>
<help-menu> <send-emacs-bug-report>

Recent messages:
Longlines mode enabled
Mac-Font-Panel mode enabled
t
Longlines mode disabled
Longlines mode enabled
Longlines mode disabled
Longlines mode enabled
Loading emacsbug...
Loading regexp-opt...done
Loading emacsbug...done

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