*** empty log message ***

[elisp/tamago.git] / its.el

diff --git a/its.el b/its.el
index d651451..2596049 100644 (file)
--- a/its.el
+++ b/its.el
@@ -31,7 +31,9 @@
 
 ;;; Code:
 
-(require 'cl)
+(eval-when-compile
+  (require 'cl))
+
 (require 'egg-edep)
 
 (defgroup its nil
@@ -47,7 +49,13 @@
   :group 'its :type 'boolean)
 
 (defcustom its-delete-by-keystroke nil
-  "*Delete characters as if cancel input keystroke, if nin-NIL."
+  "*Delete characters as if cancel input keystroke, if nin-NIL.
+This variable is overriden by `its-delete-by-character'."
+  :group 'its :type 'boolean)
+
+(defcustom its-delete-by-character nil
+  "*Delete a character as a unit even if just after input, if nin-NIL.
+This variable override `its-delete-by-keystroke'."
   :group 'its :type 'boolean)
 
 (defcustom its-fence-invisible nil
@@ -93,7 +101,7 @@
 (make-variable-buffer-local 'its-previous-select-func)
 (put 'its-previous-select-func 'permanent-local t)
 
-(defvar its-current-language)
+(defvar its-current-language nil)
 (make-variable-buffer-local 'its-current-language)
 (put 'its-current-language 'permanent-local t)
 \f
@@ -239,7 +247,7 @@
   (if (consp (cdr syl))
       (cons (its-get-output syl) (its-get-keyseq-syl syl))
     syl))
-    
+
 ;;
 ;;
 
@@ -267,8 +275,8 @@
     (define-key map "\M-y" 'its-yank-pop)
     (define-key map [backspace] 'its-delete-backward-SYL)
     (define-key map [delete] 'its-delete-backward-SYL)
-    (define-key map [M-backspace] 'its-delete-backward-SYL-by-keystroke)
-    (define-key map [M-delete] 'its-delete-backward-SYL-by-keystroke)
+    (define-key map [(meta backspace)] 'its-delete-backward-SYL-by-keystroke)
+    (define-key map [(meta delete)] 'its-delete-backward-SYL-by-keystroke)
     (define-key map [right] 'its-forward-SYL)
     (define-key map [left] 'its-backward-SYL)
     (while (< i 127)
@@ -314,7 +322,7 @@
     (let ((p (point))
          (str (copy-sequence "!")))
       (set-text-properties 0 1 (list 'read-only          t
-                                    'invisible          t
+                                    'invisible          'egg
                                     'intangible         'its-part-2
                                     'its-cursor         cursor
                                     'point-entered      'egg-enter/leave-fence
@@ -352,6 +360,7 @@
        (error "invalid fence"))
     ;; Put open-fence before inhibit-read-only to detect read-only
     (insert (if its-context its-fence-continue its-fence-open))
+    (egg-setup-invisibility-spec)
     (let ((inhibit-read-only t))
       (setq p1 (point))
       (add-text-properties p p1 open-props)
@@ -360,7 +369,7 @@
       (insert its-fence-close)
       (add-text-properties p1 (point) close-props)
       (if its-fence-invisible
-         (put-text-property p (point) 'invisible t))
+         (put-text-property p (point) 'invisible 'egg))
       (put-text-property p (point) 'read-only t)
       (goto-char p1)
       (its-define-select-keys its-mode-map t)
@@ -825,7 +834,7 @@ Return last state."
        (setq state next-state))
        ((null build-if-none)
        (error "No such state (%s)" input))
-       (t 
+       (t
        (if (not (or brand-new (= i 1) (its-get-kst/t state)))
            (its-set-interim-terminal-state state))
        (setq state (its-make-next-state state key
@@ -1010,7 +1019,7 @@ Return last state."
        (cursor (get-text-property (point) 'its-cursor)))
     (if (null syl)
        (signal 'beginning-of-buffer nil)
-      (if (eq cursor t)
+      (if (or (eq cursor t) (and cursor its-delete-by-character))
          (its-delete-backward-SYL-internal n killflag)
        (its-delete-backward-within-SYL syl n killflag)))))
 
@@ -1073,7 +1082,7 @@ Return last state."
        (signal 'beginning-of-buffer nil))
     (delete-region p (point))
     (if (> len n)
-       (its-state-machine-keyseq (substring keyseq 0 (- len n)) 
+       (its-state-machine-keyseq (substring keyseq 0 (- len n))
                                  'its-buffer-ins/del-SYL)
       (its-set-cursor-status
        (if (or (null its-delete-by-keystroke)
@@ -1547,5 +1556,31 @@ Return last state."
     (princ (documentation 'its-mode))
     (help-setup-xref (cons #'help-xref-mode (current-buffer)) (interactive-p))))
 
+;; The `point-left' hook function will never be called in Emacs 21.2.50
+;; when the command `next-line' is used in the last line of a buffer
+;; which isn't terminated with a newline or the command `previous-line'
+;; is used in the first line of a buffer.
+(defun its-next-line (&optional arg)
+  "Go to the end of the line if the line isn't terminated with a newline,
+otherwise run `next-line' as usual."
+  (interactive "p")
+  (if (= (line-end-position) (point-max))
+      (end-of-line)
+    (next-line arg)))
+
+(defun its-previous-line (&optional arg)
+  "Go to the beginning of the line if it is called in the first line of a
+buffer, otherwise run `previous-line' as usual."
+  (interactive "p")
+  (if (= (line-beginning-position) (point-mim))
+      (beginning-of-line)
+    (previous-line arg)))
+
+(substitute-key-definition 'next-line 'its-next-line
+                          its-mode-map global-map)
+(substitute-key-definition 'previous-line 'its-previous-line
+                          its-mode-map global-map)
+
 (provide 'its)
-;;; its.el ends here.
+
+;;; its.el ends here