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line movement broken with intangible (forms-mode)

From: Asko Tontti
Subject: line movement broken with intangible (forms-mode)
Date: Wed, 20 Oct 2004 16:16:40 -0700 (PDT)

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In GNU Emacs 21.3.1 (i386-redhat-linux-gnu, X
toolkit, Xaw3d scroll bars)
  of 2004-04-15 on bugs.devel.redhat.com
configured using `configure 
--host=i386-redhat-linux --build=i386-redhat-linux 
--target=i386-redhat-linux-gnu --program-prefix=
--exec-prefix=/usr --bindir=/usr/bin
--sbindir=/usr/sbin --sysconfdir=/etc 
--datadir=/usr/share --includedir=/usr/include
--libexecdir=/usr/libexec --localstatedir=/var
--mandir=/usr/share/man --infodir=/usr/share/info
--with-pop --with-sound'

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: en_US.UTF-8
   locale-coding-system: utf-8
   default-enable-multibyte-characters: t

Please describe exactly what actions triggered the
bug and the precise symptoms of the bug:

In forms major mode

1) <up> key (previous-line) doesn't work if previous
line is intangible and non-empty.

2) forms--show-record sets cursor (point) to wrong
location. It should be on the first field. There seems
to be initialization problem so that intangible
property isn't honoured properly before using <tab>
key in the current record. This is also fixed by
setting cursor to the first field.


--- simple.el.ORIG      2002-10-24 16:07:58.000000000 +0300
+++ simple.el   2004-10-20 00:10:32.167568719 +0300
@@ -2594,7 +2594,7 @@
          (goto-char (point-min))
          (let ((inhibit-point-motion-hooks nil))
            (goto-char new))
-         (if (<= new line-end)
+         (if (<= (point) line-end)
              (setq new (point)))))
        ;; NEW is where we want to move to.
        ;; LINE-BEG and LINE-END are the beginning and
end of the line.

--- forms.el.ORIG       2001-07-16 15:22:58.000000000 +0300
+++ forms.el    2004-10-20 00:22:51.505796688 +0300
@@ -1546,7 +1546,7 @@
    (funcall forms--format forms--the-record-list)

    ;; Prepare.
-  (goto-char (point-min))
+  (goto-char (aref forms--markers 0))
    (set-buffer-modified-p nil)
    (setq buffer-read-only forms-read-only)
    (setq mode-line-process

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