[xemacs-hg @ 2002-05-05 11:30:15 by ben] syntax cache, 8-bit-format, lots of code cleanup README.packages: Update info about --package-path. i.c: Create an inheritable event and pass it on to XEmacs, so that ^C can be handled properly. Intercept ^C and signal the event. "Stop Build" in VC++ now works. bytecomp-runtime.el: Doc string changes. compat.el: Some attempts to redo this to make it truly useful and fix the "multiple versions interacting with each other" problem. Not yet done. Currently doesn't work. files.el: Use with-obsolete-variable to avoid warnings in new revert-buffer code. xemacs.mak: Split up CFLAGS into a version without flags specifying the C library. The problem seems to be that minitar depends on zlib, which depends specifically on libc.lib, not on any of the other C libraries. Unless you compile with libc.lib, you get errors -- specifically, no _errno in the other libraries, which must make it something other than an int. (#### But this doesn't seem to obtain in XEmacs, which also uses zlib, and can be linked with any of the C libraries. Maybe zlib is used differently and doesn't need errno, or maybe XEmacs provides an int errno; ... I don't understand. Makefile.in.in: Fix so that packages are around when testing. abbrev.c, alloc.c, buffer.c, buffer.h, bytecode.c, callint.c, casefiddle.c, casetab.c, casetab.h, charset.h, chartab.c, chartab.h, cmds.c, console-msw.h, console-stream.c, console-x.c, console.c, console.h, data.c, device-msw.c, device.c, device.h, dialog-msw.c, dialog-x.c, dired-msw.c, dired.c, doc.c, doprnt.c, dumper.c, editfns.c, elhash.c, emacs.c, eval.c, event-Xt.c, event-gtk.c, event-msw.c, event-stream.c, events.c, events.h, extents.c, extents.h, faces.c, file-coding.c, file-coding.h, fileio.c, fns.c, font-lock.c, frame-gtk.c, frame-msw.c, frame-x.c, frame.c, frame.h, glade.c, glyphs-gtk.c, glyphs-msw.c, glyphs-msw.h, glyphs-x.c, glyphs.c, glyphs.h, gui-msw.c, gui-x.c, gui.h, gutter.h, hash.h, indent.c, insdel.c, intl-win32.c, intl.c, keymap.c, lisp-disunion.h, lisp-union.h, lisp.h, lread.c, lrecord.h, lstream.c, lstream.h, marker.c, menubar-gtk.c, menubar-msw.c, menubar-x.c, menubar.c, minibuf.c, mule-ccl.c, mule-charset.c, mule-coding.c, mule-wnnfns.c, nas.c, objects-msw.c, objects-x.c, opaque.c, postgresql.c, print.c, process-nt.c, process-unix.c, process.c, process.h, profile.c, rangetab.c, redisplay-gtk.c, redisplay-msw.c, redisplay-output.c, redisplay-x.c, redisplay.c, redisplay.h, regex.c, regex.h, scrollbar-msw.c, search.c, select-x.c, specifier.c, specifier.h, symbols.c, symsinit.h, syntax.c, syntax.h, syswindows.h, tests.c, text.c, text.h, tooltalk.c, ui-byhand.c, ui-gtk.c, unicode.c, win32.c, window.c: Another big Ben patch. -- FUNCTIONALITY CHANGES: add partial support for 8-bit-fixed, 16-bit-fixed, and 32-bit-fixed formats. not quite done yet. (in particular, needs functions to actually convert the buffer.) NOTE: lots of changes to regex.c here. also, many new *_fmt() inline funs that take an Internal_Format argument. redo syntax cache code. make the cache per-buffer; keep the cache valid across calls to functions that use it. also keep it valid across insertions/deletions and extent changes, as much as is possible. eliminate the junky regex-reentrancy code by passing in the relevant lisp info to the regex routines as local vars. add general mechanism in extents code for signalling extent changes. fix numerous problems with the case-table implementation; yoshiki never properly transferred many algorithms from old-style to new-style case tables. redo char tables to support a default argument, so that mapping only occurs over changed args. change many chartab functions to accept Lisp_Object instead of Lisp_Char_Table *. comment out the code in font-lock.c by default, because font-lock.el no longer uses it. we should consider eliminating it entirely. Don't output bell as ^G in console-stream when not a TTY. add -mswindows-termination-handle to interface with i.c, so we can properly kill a build. add more error-checking to buffer/string macros. add some additional buffer_or_string_() funs. -- INTERFACE CHANGES AFFECTING MORE CODE: switch the arguments of write_c_string and friends to be consistent with write_fmt_string, which must have printcharfun first. change BI_* macros to BYTE_* for increased clarity; similarly for bi_* local vars. change VOID_TO_LISP to be a one-argument function. eliminate no-longer-needed CVOID_TO_LISP. -- char/string macro changes: rename MAKE_CHAR() to make_emchar() for slightly less confusion with make_char(). (The former generates an Emchar, the latter a Lisp object. Conceivably we should rename make_char() -> wrap_char() and similarly for make_int(), make_float().) Similar changes for other *CHAR* macros -- we now consistently use names with `emchar' whenever we are working with Emchars. Any remaining name with just `char' always refers to a Lisp object. rename macros with XSTRING_* to string_* except for those that reference actual fields in the Lisp_String object, following conventions used elsewhere. rename set_string_{data,length} macros (the only ones to work with a Lisp_String_* instead of a Lisp_Object) to set_lispstringp_* to make the difference clear. try to be consistent about caps vs. lowercase in macro/inline-fun names for chars and such, which wasn't the case before. we now reserve caps either for XFOO_ macros that reference object fields (e.g. XSTRING_DATA) or for things that have non-function semantics, e.g. directly modifying an arg (BREAKUP_EMCHAR) or evaluating an arg (any arg) more than once. otherwise, use lowercase. here is a summary of most of the macros/inline funs changed by all of the above changes: BYTE_*_P -> byte_*_p XSTRING_BYTE -> string_byte set_string_data/length -> set_lispstringp_data/length XSTRING_CHAR_LENGTH -> string_char_length XSTRING_CHAR -> string_emchar INTBYTE_FIRST_BYTE_P -> intbyte_first_byte_p INTBYTE_LEADING_BYTE_P -> intbyte_leading_byte_p charptr_copy_char -> charptr_copy_emchar LEADING_BYTE_* -> leading_byte_* CHAR_* -> EMCHAR_* *_CHAR_* -> *_EMCHAR_* *_CHAR -> *_EMCHAR CHARSET_BY_ -> charset_by_* BYTE_SHIFT_JIS* -> byte_shift_jis* BYTE_BIG5* -> byte_big5* REP_BYTES_BY_FIRST_BYTE -> rep_bytes_by_first_byte char_to_unicode -> emchar_to_unicode valid_char_p -> valid_emchar_p Change intbyte_strcmp -> qxestrcmp_c (duplicated functionality). -- INTERFACE CHANGES AFFECTING LESS CODE: use DECLARE_INLINE_HEADER in various places. remove '#ifdef emacs' from XEmacs-only files. eliminate CHAR_TABLE_VALUE(), which duplicated the functionality of get_char_table(). add BUFFER_TEXT_LOOP to simplify iterations over buffer text. define typedefs for signed and unsigned types of fixed sizes (INT_32_BIT, UINT_32_BIT, etc.). create ALIGN_FOR_TYPE as a higher-level interface onto ALIGN_SIZE; fix code to use it. add charptr_emchar_len to return the text length of the character pointed to by a ptr; use it in place of charcount_to_bytecount(..., 1). add emchar_len to return the text length of a given character. add types Bytexpos and Charxpos to generalize Bytebpos/Bytecount and Charbpos/Charcount, in code (particularly, the extents code and redisplay code) that works with either kind of index. rename redisplay struct params with names such as `charbpos' to e.g. `charpos' when they are e.g. a Charxpos, not a Charbpos. eliminate xxDEFUN in place of DEFUN; no longer necessary with changes awhile back to doc.c. split up big ugly combined list of EXFUNs in lisp.h on a file-by-file basis, since other prototypes are similarly split. rewrite some "*_UNSAFE" macros as inline funs and eliminate the _UNSAFE suffix. move most string code from lisp.h to text.h; the string code and text.h code is now intertwined in such a fashion that they need to be in the same place and partially interleaved. (you can't create forward references for inline funs) automated/lisp-tests.el, automated/symbol-tests.el, automated/test-harness.el: Fix test harness to output FAIL messages to stderr when in batch mode. Fix up some problems in lisp-tests/symbol-tests that were causing spurious failures.

;;; auto-show.el --- perform automatic horizontal scrolling as point moves

;; Copyright (C) 1997 Free Software Foundation, Inc.
;; This file is in the public domain.

;; Author: Pete Ware <ware@cis.ohio-state.edu>
;; Maintainer: XEmacs Development Team
;; Keywords: extensions, internal, dumped

;; This file is part of XEmacs.

;; XEmacs is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; XEmacs is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;; General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with XEmacs; see the file COPYING.  If not, write to the Free
;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
;; 02111-1307, USA.

;;; Synched up with: Emacs/Mule zeta.

;;; Commentary:

;; This file is dumped with XEmacs.

;; Modified by: Ben Wing <ben@xemacs.org>

;; This file provides functions that
;; automatically scroll the window horizontally when the point moves
;; off the left or right side of the window.

;; Once this library is loaded, automatic horizontal scrolling
;; occurs whenever long lines are being truncated.
;; To request truncation of long lines, set the variable
;; Setting the variable `truncate-lines' to non-nil.
;; You can do this for all buffers as follows:
;;
;; (set-default 'truncate-lines t)

;; Here is how to do it for C mode only:
;;
;; (set-default 'truncate-lines nil)	; this is the original value
;; (defun my-c-mode-hook ()
;;   "Run when C-mode starts up.  Changes ..."
;;   ... set various personal preferences ...
;;   (setq truncate-lines t))
;; (add-hook 'c-mode-hook 'my-c-mode-hook)
;;
;;
;; As a finer level of control, you can still have truncated lines but
;; without the automatic horizontal scrolling by setting the buffer
;; local variable `auto-show-mode' to nil.  The default value is t.
;; The command `auto-show-mode' toggles the value of the variable
;; `auto-show-mode'.

;;; Code:

(defgroup auto-show nil
  "Perform automatic horizontal scrolling as point moves."
  :group 'display
  :group 'extensions)

;; This is preloaded, so we don't need special :set, :require, etc.
(defcustom auto-show-mode t
  "*Non-nil enables automatic horizontal scrolling, when lines are truncated.
The default value is t.  To change the default, do this:
	(set-default 'auto-show-mode nil)
See also command `auto-show-mode'.
This variable has no effect when lines are not being truncated.
This variable is automatically local in each buffer where it is set."
  :type 'boolean
  :group 'auto-show)

(make-variable-buffer-local 'auto-show-mode)

(defcustom auto-show-shift-amount 8 
  "*Extra columns to scroll. for automatic horizontal scrolling."
  :type 'integer
  :group 'auto-show)

(defcustom auto-show-show-left-margin-threshold 50
  "*Threshold column for automatic horizontal scrolling to the right.
If point is before this column, we try to scroll to make the left margin
visible.  Setting this to 0 disables this feature."
  :type 'number
  :group 'auto-show)

(defun auto-show-mode (arg)
  "Turn automatic horizontal scroll mode on or off.
With arg, turn auto scrolling on if arg is positive, off otherwise.
This mode is enabled or disabled for each buffer individually.
It takes effect only when `truncate-lines' is non-nil."
  (interactive "P")
  (setq auto-show-mode
	(if (null arg)
	    (not auto-show-mode)
	  (> (prefix-numeric-value arg) 0))))

;; XEmacs addition:
(defvar auto-show-inhibiting-commands
  '(scrollbar-char-left
    scrollbar-char-right
    scrollbar-page-left
    scrollbar-page-right
    scrollbar-to-left
    scrollbar-to-right
    scrollbar-horizontal-drag)
  "Commands that inhibit auto-show behavior.
This normally includes the horizontal scrollbar commands.")

;; XEmacs addition:
(defun auto-show-should-take-action-p ()
  (and auto-show-mode (window-truncated-p)
       (equal (window-buffer) (current-buffer))
       (not (memq this-command auto-show-inhibiting-commands))))

;; XEmacs addition:
(defun auto-show-make-region-visible (start end)
  "Move point in such a way that the region (START, END) is visible.
This only does anything if auto-show-mode is enabled, and it doesn't
actually do any horizontal scrolling; rather, it just sets things up so
that the region will be visible when `auto-show-make-point-visible'
is next called (this happens after every command)."
  (if (auto-show-should-take-action-p)
      (let* ((scroll (window-hscroll))	;how far window is scrolled
	     (w-width (- (window-width) 
			 (if (> scroll 0)
			     2 1)))	;how wide window is on the screen
	     (right-col (+ scroll w-width))
	     (start-col (save-excursion (goto-char start) (current-column)))
	     (end-col (save-excursion (goto-char end) (current-column))))
	(cond ((and (>= start-col scroll)
		    (<= end-col right-col))
	       ;; already completely visible
	       nil)
	      ((< start-col scroll)
	       (scroll-right (- scroll start-col)))
	      (t
	       (scroll-left (- end-col right-col)))))))

(defun auto-show-make-point-visible (&optional ignore-arg)
  "Scroll horizontally to make point visible, if that is enabled.
This function only does something if `auto-show-mode' is non-nil
and longlines are being truncated in the selected window.
See also the command `auto-show-mode'."
  (interactive)
  ;; XEmacs change
  (if (auto-show-should-take-action-p)
      (let* ((col (current-column))	;column on line point is at
	     (scroll (window-hscroll))	;how far window is scrolled
	     (w-width (- (window-width) 
			 (if (> scroll 0)
			     2 1)))	;how wide window is on the screen
	     (right-col (+ scroll w-width)))
	(if (and (< col auto-show-show-left-margin-threshold)
		 (< col (window-width))
		 (> scroll 0))
	    (scroll-right scroll)
	  (if (< col scroll)		;to the left of the screen
	      (scroll-right (+ (- scroll col) auto-show-shift-amount))
	    (if (or (> col right-col)	;to the right of the screen
		    (and (= col right-col)
			 (not (eolp))))
		(scroll-left (+ auto-show-shift-amount 
				(- col (+ scroll w-width))))))))))

;; XEmacs change:
;; #### instead of this, we kludgily call it from the C code, to make sure
;; that it's done after any other things on post-command-hook (which might
;; move point).
;; Do auto-scrolling after commands.
;;(add-hook 'post-command-hook 'auto-show-make-point-visible)

;; If being dumped, turn it on right away.
(when (boundp 'pureload)
  (auto-show-mode 1))

;; Do auto-scrolling in comint buffers after process output also.
; XEmacs -- don't do this now, it messes up comint.
;(add-hook 'comint-output-filter-functions 'auto-show-make-point-visible t)

(provide 'auto-show)

;;; auto-show.el ends here