From: "Herbert Euler" <address@hidden>
To: address@hidden
Subject: Patch: Syntax and Hard Newlines
Date: Mon, 13 Nov 2006 13:24:59 +0800
Emacs provides a hard newline mode. If you type M-x use-hard-newlines
RET, you turn on the hard newline mode. In this mode, all newlines in
a buffer are re-scanned and marked as either a ``hard'' one or a
``soft'' one. The behavior of commands inserting a newline character
is also altered: `newline' and `open-line' will add the text property
`hard' (value set to t) to newlines that they insert.
As documented in the doc string of the command `use-hard-newlines',
newlines not marked hard are internal to paragraphs. However,
currently the syntax feature does not work well with this. For
example, if you turn on long-lines mode with M-x longlines-mode RET in
the *scratch* buffer, you will see the word `evaluation' in the first
line is wrapped into the second line, but not recognized as a part of
the comment.
To fix this, we can let the function `forw_comment' in syntax.c skip
the soft newlines when possible. Below is the patch.
Regards,
Guanpeng Xu
Index: syntax.c
===================================================================
RCS file: /sources/emacs/emacs/src/syntax.c,v
retrieving revision 1.166.4.20
diff -r1.166.4.20 syntax.c
2126a2127
register int skip_soft_newlines;
2129a2131,2137
/* If `use-hard-newlines' is t, only newlines with the `hard'
property set to t are real newlines. Other newlines are soft and
should be skipped. */
skip_soft_newlines = !NILP (Fsymbol_value
(intern
("use-hard-newlines")));
2145a2154,2163
if (skip_soft_newlines
&& c == '\n'
&& NILP (Fget_text_property (make_number (from_byte),
intern ("hard"),
Qnil)))
{
INC_BOTH (from, from_byte);
UPDATE_SYNTAX_TABLE_FORWARD (from);
continue;
}
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