Initial revision

1 files changed, 540 insertions, 0 deletions

diff --git a/src/abbrev.c b/src/abbrev.c
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+++ b/src/abbrev.c
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+/* Primitives for word-abbrev mode.
+   Copyright (C) 1985, 1986 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs 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 1, or (at your option)
+any later version.
+
+GNU Emacs 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 GNU Emacs; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+#include "config.h"
+#include <stdio.h>
+#undef NULL
+#include "lisp.h"
+#include "commands.h"
+#include "buffer.h"
+#include "window.h"
+
+/* An abbrev table is an obarray.
+ Each defined abbrev is represented by a symbol in that obarray
+ whose print name is the abbreviation.
+ The symbol's value is a string which is the expansion.
+ If its function definition is non-nil, it is called
+  after the expansion is done.
+ The plist slot of the abbrev symbol is its usage count. */
+
+/* List of all abbrev-table name symbols:
+ symbols whose values are abbrev tables.  */
+
+Lisp_Object Vabbrev_table_name_list;
+
+/* The table of global abbrevs.  These are in effect
+ in any buffer in which abbrev mode is turned on. */
+
+Lisp_Object Vglobal_abbrev_table;
+
+/* The local abbrev table used by default (in Fundamental Mode buffers) */
+
+Lisp_Object Vfundamental_mode_abbrev_table;
+
+/* Set nonzero when an abbrev definition is changed */
+
+int abbrevs_changed;
+
+int abbrev_all_caps;
+
+/* Non-nil => use this location as the start of abbrev to expand
+ (rather than taking the word before point as the abbrev) */
+
+Lisp_Object Vabbrev_start_location;
+
+/* Buffer that Vabbrev_start_location applies to */
+Lisp_Object Vabbrev_start_location_buffer;
+
+/* The symbol representing the abbrev most recently expanded */
+
+Lisp_Object Vlast_abbrev;
+
+/* A string for the actual text of the abbrev most recently expanded.
+   This has more info than Vlast_abbrev since case is significant.  */
+
+Lisp_Object Vlast_abbrev_text;
+
+/* Character address of start of last abbrev expanded */
+
+int last_abbrev_point;
+
+
+DEFUN ("make-abbrev-table", Fmake_abbrev_table, Smake_abbrev_table, 0, 0, 0,
+  "Create a new, empty abbrev table object.")
+  ()
+{
+  return Fmake_vector (make_number (59), make_number (0));
+}
+
+DEFUN ("clear-abbrev-table", Fclear_abbrev_table, Sclear_abbrev_table, 1, 1, 0,
+  "Undefine all abbrevs in abbrev table TABLE, leaving it empty.")
+  (table)
+     Lisp_Object table;
+{
+  int i, size;
+
+  CHECK_VECTOR (table, 0);
+  size = XVECTOR (table)->size;
+  abbrevs_changed = 1;
+  for (i = 0; i < size; i++)
+    XVECTOR (table)->contents[i] = make_number (0);
+  return Qnil;
+}
+
+DEFUN ("define-abbrev", Fdefine_abbrev, Sdefine_abbrev, 3, 5, 0,
+  "Define an abbrev in TABLE named NAME, to expand to EXPANSION and call HOOK.\n\
+NAME and EXPANSION are strings.\n\
+To undefine an abbrev, define it with EXPANSION = nil.\n\
+If HOOK is non-nil, it should be a function of no arguments;\n\
+it is called after EXPANSION is inserted.")
+  (table, name, expansion, hook, count)
+     Lisp_Object table, name, expansion, hook, count;
+{
+  Lisp_Object sym, oexp, ohook, tem;
+  CHECK_VECTOR (table, 0);
+  CHECK_STRING (name, 1);
+  if (!NULL (expansion))
+    CHECK_STRING (expansion, 2);
+  if (NULL (count))
+    count = make_number (0);
+  else
+    CHECK_NUMBER (count, 0);
+
+  sym = Fintern (name, table);
+
+  oexp = XSYMBOL (sym)->value;
+  ohook = XSYMBOL (sym)->function;
+  if (!((EQ (oexp, expansion)
+	 || (XTYPE (oexp) == Lisp_String && XTYPE (expansion) == Lisp_String
+	     && (tem = Fstring_equal (oexp, expansion), !NULL (tem))))
+	&&
+	(EQ (ohook, hook)
+	 || (tem = Fequal (ohook, hook), !NULL (tem)))))
+    abbrevs_changed = 1;
+
+  Fset (sym, expansion);
+  Ffset (sym, hook);
+  Fsetplist (sym, count);
+
+  return name;
+}
+
+DEFUN ("define-global-abbrev", Fdefine_global_abbrev, Sdefine_global_abbrev, 2, 2,
+  "sDefine global abbrev: \nsExpansion for %s: ",
+  "Define ABBREV as a global abbreviation for EXPANSION.")
+  (name, expansion)
+     Lisp_Object name, expansion;
+{
+  Fdefine_abbrev (Vglobal_abbrev_table, Fdowncase (name),
+		  expansion, Qnil, make_number (0));
+  return name;
+}
+
+DEFUN ("define-mode-abbrev", Fdefine_mode_abbrev, Sdefine_mode_abbrev, 2, 2,
+  "sDefine mode abbrev: \nsExpansion for %s: ",
+  "Define ABBREV as a mode-specific abbreviation for EXPANSION.")
+  (name, expansion)
+     Lisp_Object name, expansion;
+{
+  if (NULL (current_buffer->abbrev_table))
+    error ("Major mode has no abbrev table");
+
+  Fdefine_abbrev (current_buffer->abbrev_table, Fdowncase (name),
+		  expansion, Qnil, make_number (0));
+  return name;
+}
+
+DEFUN ("abbrev-symbol", Fabbrev_symbol, Sabbrev_symbol, 1, 2, 0,
+  "Return the symbol representing abbrev named ABBREV.\n\
+This symbol's name is ABBREV, but it is not the canonical symbol of that name;\n\
+it is interned in an abbrev-table rather than the normal obarray.\n\
+The value is nil if that abbrev is not defined.\n\
+Optional second arg TABLE is abbrev table to look it up in.\n\
+The default is to try buffer's mode-specific abbrev table, then global table.")
+  (abbrev, table)
+     Lisp_Object abbrev, table;
+{
+  Lisp_Object sym;
+  CHECK_STRING (abbrev, 0);
+  if (!NULL (table))
+    sym = Fintern_soft (abbrev, table);
+  else
+    {
+      sym = Qnil;
+      if (!NULL (current_buffer->abbrev_table))
+	sym = Fintern_soft (abbrev, current_buffer->abbrev_table);
+      if (NULL (XSYMBOL (sym)->value))
+	sym = Qnil;
+      if (NULL (sym))
+	sym = Fintern_soft (abbrev, Vglobal_abbrev_table);
+    }
+  if (NULL (XSYMBOL (sym)->value)) return Qnil;
+  return sym;
+}
+
+DEFUN ("abbrev-expansion", Fabbrev_expansion, Sabbrev_expansion, 1, 2, 0,
+  "Return the string that ABBREV expands into in the current buffer.\n\
+Optionally specify an abbrev table as second arg;\n\
+then ABBREV is looked up in that table only.")
+  (abbrev, table)
+     Lisp_Object abbrev, table;
+{
+  Lisp_Object sym;
+  sym = Fabbrev_symbol (abbrev, table);
+  if (NULL (sym)) return sym;
+  return Fsymbol_value (sym);
+}
+
+/* Expand the word before point, if it is an abbrev.
+  Returns 1 if an expansion is done. */
+
+DEFUN ("expand-abbrev", Fexpand_abbrev, Sexpand_abbrev, 0, 0, "",
+  "Expand the abbrev before point, if there is an abbrev there.\n\
+Effective when explicitly called even when `abbrev-mode' is nil.\n\
+Returns t if expansion took place.")
+  ()
+{
+  register char *buffer, *p;
+  register int wordstart, wordend, idx;
+  int whitecnt;
+  int uccount = 0, lccount = 0;
+  register Lisp_Object sym;
+  Lisp_Object expansion, hook, tem;
+
+  if (XBUFFER (Vabbrev_start_location_buffer) != current_buffer)
+    Vabbrev_start_location = Qnil;
+  if (!NULL (Vabbrev_start_location))
+    {
+      tem = Vabbrev_start_location;
+      CHECK_NUMBER_COERCE_MARKER (tem, 0);
+      wordstart = XINT (tem);
+      Vabbrev_start_location = Qnil;
+      if (FETCH_CHAR (wordstart) == '-')
+	del_range (wordstart, wordstart + 1);
+    }
+  else
+    wordstart = scan_words (point, -1);
+
+  if (!wordstart)
+    return Qnil;
+
+  wordend = scan_words (wordstart, 1);
+  if (!wordend)
+    return Qnil;
+
+  if (wordend > point)
+    wordend = point;
+  whitecnt = point - wordend;
+  if (wordend <= wordstart)
+    return Qnil;
+
+  p = buffer = (char *) alloca (wordend - wordstart);
+
+  for (idx = wordstart; idx < point; idx++)
+    {
+      register int c = FETCH_CHAR (idx);
+      if (UPPERCASEP (c))
+	c = DOWNCASE (c), uccount++;
+      else if (! NOCASEP (c))
+	lccount++;
+      *p++ = c;
+    }
+
+  if (XTYPE (current_buffer->abbrev_table) == Lisp_Vector)
+    sym = oblookup (current_buffer->abbrev_table, buffer, p - buffer);
+  else
+    XFASTINT (sym) = 0;
+  if (XTYPE (sym) == Lisp_Int || NULL (XSYMBOL (sym)->value))
+    sym = oblookup (Vglobal_abbrev_table, buffer, p - buffer);
+  if (XTYPE (sym) == Lisp_Int || NULL (XSYMBOL (sym)->value))
+    return Qnil;
+
+  if (INTERACTIVE && !EQ (minibuf_window, selected_window))
+    {
+      SET_PT (wordend);
+      Fundo_boundary ();
+    }
+  SET_PT (wordstart);
+  Vlast_abbrev_text
+    = Fbuffer_substring (make_number (wordstart), make_number (wordend));
+  del_range (wordstart, wordend);
+
+  /* Now sym is the abbrev symbol. */
+  Vlast_abbrev = sym;
+  last_abbrev_point = wordstart;
+
+  if (XTYPE (XSYMBOL (sym)->plist) == Lisp_Int)
+    XSETINT (XSYMBOL (sym)->plist,
+	     XINT (XSYMBOL (sym)->plist) + 1);	/* Increment use count */
+
+  expansion = XSYMBOL (sym)->value;
+  insert_from_string (expansion, 0, XSTRING (expansion)->size);
+  SET_PT (point + whitecnt);
+
+  if (uccount && !lccount)
+    {
+      /* Abbrev was all caps */
+      /* If expansion is multiple words, normally capitalize each word */
+      /* This used to be if (!... && ... >= ...) Fcapitalize; else Fupcase
+	 but Megatest 68000 compiler can't handle that */
+      if (!abbrev_all_caps)
+	if (scan_words (point, -1) > scan_words (wordstart, 1))
+	  {
+	    upcase_initials_region (make_number (wordstart),
+				    make_number (point));
+	    goto caped;
+	  }
+      /* If expansion is one word, or if user says so, upcase it all. */
+      Fupcase_region (make_number (wordstart), make_number (point));
+    caped: ;
+    }
+  else if (uccount)
+    {
+      /* Abbrev included some caps.  Cap first initial of expansion */
+      idx = point;
+      SET_PT (wordstart);
+      Fcapitalize_word (make_number (1));
+      SET_PT (idx);
+    }
+
+  hook = XSYMBOL (sym)->function;
+  if (!NULL (hook))
+    call0 (hook);
+
+  return Qt;
+}
+
+DEFUN ("unexpand-abbrev", Funexpand_abbrev, Sunexpand_abbrev, 0, 0, "",
+  "Undo the expansion of the last abbrev that expanded.\n\
+This differs from ordinary undo in that other editing done since then\n\
+is not undone.")
+  ()
+{
+  int opoint = point;
+  int adjust = 0;
+  if (last_abbrev_point < BEGV
+      || last_abbrev_point > ZV)
+    return Qnil;
+  SET_PT (last_abbrev_point);
+  if (XTYPE (Vlast_abbrev_text) == Lisp_String)
+    {
+      /* This isn't correct if Vlast_abbrev->function was used
+         to do the expansion */
+      Lisp_Object val;
+      XSET (val, Lisp_String, XSYMBOL (Vlast_abbrev)->value);
+      adjust = XSTRING (val)->size;
+      del_range (point, point + adjust);
+      insert_from_string (Vlast_abbrev_text, 0,
+			  XSTRING (Vlast_abbrev_text)->size);
+      adjust -= XSTRING (Vlast_abbrev_text)->size;
+      Vlast_abbrev_text = Qnil;
+    }
+  SET_PT (last_abbrev_point < opoint ? opoint - adjust : opoint);
+  return Qnil;
+}
+
+static
+write_abbrev (sym, stream)
+     Lisp_Object sym, stream;
+{
+  Lisp_Object name;
+  if (NULL (XSYMBOL (sym)->value))
+    return;
+  insert ("    (", 5);
+  XSET (name, Lisp_String, XSYMBOL (sym)->name);
+  Fprin1 (name, stream);
+  insert (" ", 1);
+  Fprin1 (XSYMBOL (sym)->value, stream);
+  insert (" ", 1);
+  Fprin1 (XSYMBOL (sym)->function, stream);
+  insert (" ", 1);
+  Fprin1 (XSYMBOL (sym)->plist, stream);
+  insert (")\n", 2);
+}
+
+static
+describe_abbrev (sym, stream)
+     Lisp_Object sym, stream;
+{
+  Lisp_Object one;
+
+  if (NULL (XSYMBOL (sym)->value))
+    return;
+  one = make_number (1);
+  Fprin1 (Fsymbol_name (sym), stream);
+  Findent_to (make_number (15), one);
+  Fprin1 (XSYMBOL (sym)->plist, stream);
+  Findent_to (make_number (20), one);
+  Fprin1 (XSYMBOL (sym)->value, stream);
+  if (!NULL (XSYMBOL (sym)->function))
+    {
+      Findent_to (make_number (45), one);
+      Fprin1 (XSYMBOL (sym)->function, stream);
+    }
+  Fterpri (stream);
+}
+
+DEFUN ("insert-abbrev-table-description",
+  Finsert_abbrev_table_description, Sinsert_abbrev_table_description,
+  1, 2, 0,
+  "Insert before point a full description of abbrev table named NAME.\n\
+NAME is a symbol whose value is an abbrev table.\n\
+If optional 2nd arg HUMAN is non-nil, a human-readable description is inserted.\n\
+Otherwise the description is an expression,\n\
+a call to `define-abbrev-table', which would\n\
+define the abbrev table NAME exactly as it is currently defined.")
+  (name, readable)
+     Lisp_Object name, readable;
+{
+  Lisp_Object table;
+  Lisp_Object stream;
+
+  CHECK_SYMBOL (name, 0);
+  table = Fsymbol_value (name);
+  CHECK_VECTOR (table, 0);
+
+  XSET (stream, Lisp_Buffer, current_buffer);
+
+  if (!NULL (readable))
+    {
+      insert_string ("(");
+      Fprin1 (name, stream);
+      insert_string (")\n\n");
+      map_obarray (table, describe_abbrev, stream);
+      insert_string ("\n\n");
+    }
+  else
+    {
+      insert_string ("(define-abbrev-table '");
+      Fprin1 (name, stream);
+      insert_string (" '(\n");
+      map_obarray (table, write_abbrev, stream);
+      insert_string ("    ))\n\n");
+    }
+
+  return Qnil;
+}
+
+DEFUN ("define-abbrev-table", Fdefine_abbrev_table, Sdefine_abbrev_table,
+       2, 2, 0,
+  "Define TABNAME (a symbol) as an abbrev table name.\n\
+Define abbrevs in it according to DEFINITIONS, which is a list of elements\n\
+of the form (ABBREVNAME EXPANSION HOOK USECOUNT).")
+  (tabname, defns)
+     Lisp_Object tabname, defns;
+{
+  Lisp_Object name, exp, hook, count;
+  Lisp_Object table, elt;
+
+  CHECK_SYMBOL (tabname, 0);
+  table = Fboundp (tabname);
+  if (NULL (table) || (table = Fsymbol_value (tabname), NULL (table)))
+    {
+      table = Fmake_abbrev_table ();
+      Fset (tabname, table);
+      Vabbrev_table_name_list =
+	Fcons (tabname, Vabbrev_table_name_list);
+    }
+  CHECK_VECTOR (table, 0);
+
+  for (;!NULL (defns); defns = Fcdr (defns))
+    {
+      elt = Fcar (defns);
+      name = Fcar (elt);
+      elt = Fcdr (elt);
+      exp = Fcar (elt);
+      elt = Fcdr (elt);
+      hook = Fcar (elt);
+      elt = Fcdr (elt);
+      count = Fcar (elt);
+      Fdefine_abbrev (table, name, exp, hook, count);
+    }
+  return Qnil;
+}
+
+syms_of_abbrev ()
+{
+  DEFVAR_LISP ("abbrev-table-name-list", &Vabbrev_table_name_list,
+    "List of symbols whose values are abbrev tables.");
+  Vabbrev_table_name_list = Fcons (intern ("fundamental-mode-abbrev-table"),
+				   Fcons (intern ("global-abbrev-table"),
+					  Qnil));
+
+  DEFVAR_LISP ("global-abbrev-table", &Vglobal_abbrev_table,
+    "The abbrev table whose abbrevs affect all buffers.\n\
+Each buffer may also have a local abbrev table.\n\
+If it does, the local table overrides the global one\n\
+for any particular abbrev defined in both.");
+  Vglobal_abbrev_table = Fmake_abbrev_table ();
+
+  DEFVAR_LISP ("fundamental-mode-abbrev-table", &Vfundamental_mode_abbrev_table,
+    "The abbrev table of mode-specific abbrevs for Fundamental Mode.");
+  Vfundamental_mode_abbrev_table = Fmake_abbrev_table ();
+  current_buffer->abbrev_table = Vfundamental_mode_abbrev_table;
+
+  DEFVAR_LISP ("last-abbrev", &Vlast_abbrev,
+    "The abbrev-symbol of the last abbrev expanded.  See `abbrev-symbol'.");
+
+  DEFVAR_LISP ("last-abbrev-text", &Vlast_abbrev_text,
+    "The exact text of the last abbrev expanded.\n\
+nil if the abbrev has already been unexpanded.");
+
+  DEFVAR_INT ("last-abbrev-location", &last_abbrev_point,
+    "The location of the start of the last abbrev expanded.");
+
+  Vlast_abbrev = Qnil;
+  Vlast_abbrev_text = Qnil;
+  last_abbrev_point = 0;
+
+  DEFVAR_LISP ("abbrev-start-location", &Vabbrev_start_location,
+    "Buffer position for `expand-abbrev' to use as the start of the abbrev.\n\
+nil means use the word before point as the abbrev.\n\
+Calling `expand-abbrev' sets this to nil.");
+  Vabbrev_start_location = Qnil;
+
+  DEFVAR_LISP ("abbrev-start-location-buffer", &Vabbrev_start_location_buffer,
+    "Buffer that `abbrev-start-location' has been set for.\n\
+Trying to expand an abbrev in any other buffer clears `abbrev-start-location'.");
+  Vabbrev_start_location_buffer = Qnil;
+
+  DEFVAR_PER_BUFFER ("local-abbrev-table", &current_buffer->abbrev_table,
+    "Local (mode-specific) abbrev table of current buffer.");
+
+  DEFVAR_BOOL ("abbrevs-changed", &abbrevs_changed,
+    "Set non-nil by defining or altering any word abbrevs.\n\
+This causes `save-some-buffers' to offer to save the abbrevs.");
+  abbrevs_changed = 0;
+
+  DEFVAR_BOOL ("abbrev-all-caps", &abbrev_all_caps,
+    "*Set non-nil means expand multi-word abbrevs all caps if abbrev was so.");
+  abbrev_all_caps = 0;
+
+  defsubr (&Smake_abbrev_table);
+  defsubr (&Sclear_abbrev_table);
+  defsubr (&Sdefine_abbrev);
+  defsubr (&Sdefine_global_abbrev);
+  defsubr (&Sdefine_mode_abbrev);
+  defsubr (&Sabbrev_expansion);
+  defsubr (&Sabbrev_symbol);
+  defsubr (&Sexpand_abbrev);
+  defsubr (&Sunexpand_abbrev);
+  defsubr (&Sinsert_abbrev_table_description);
+  defsubr (&Sdefine_abbrev_table);
+}