bleh

1 files changed, 103 insertions, 39 deletions

@@ -32,7 +32,7 @@ functions), though it can also contain cons cells of the
 form (SEGMENT . PREDICATE).
 
 Segments are separated from each other using SEPARATOR, which
-defaults to a \" \".  space.  Only segments that evaluate to a
+defaults to a \" \".  Only segments that evaluate to a
 non-trivial string (that is, a string not equal to \"\") will be
 separated, for a cleaner look.
 
@@ -42,18 +42,18 @@ This function makes a lambda, so you can throw it straight into
   (lambda ()
     (apply #'concat
            (let (this-sep result-list)
-                          (dolist (segment segments)
-                            (push (funcall (or (car-safe segment) segment)
-                                           this-sep)
-                                  result-list)
-                            (if (or (cdr-safe segment)
-                                    (and (car result-list)
-                                         (not (equal (car result-list) ""))))
-                                (setq this-sep separator)
-                              (setq this-sep nil)))
-                          (unless (seq-some #'null result-list)
-                            (push +modeline-default-spacer result-list))
-                          (nreverse result-list)))))
+             (dolist (segment segments)
+               (push (funcall (or (car-safe segment) segment)
+                              this-sep)
+                     result-list)
+               (if (or (cdr-safe segment)
+                       (and (car result-list)
+                            (not (equal (car result-list) ""))))
+                   (setq this-sep separator)
+                 (setq this-sep nil)))
+             (unless (seq-some #'null result-list)
+               (push +modeline-default-spacer result-list))
+             (nreverse result-list)))))
 
 ;;; Modeline segments
 
@@ -62,14 +62,36 @@ This function makes a lambda, so you can throw it straight into
   (when string
     (string-replace "%" "%%" string)))
 
+(defcustom +modeline-buffer-name-max-length 0
+  "Maximum length of `+modeline-buffer-name'.
+If > 0 and < 1, use that portion of the window's width.  If > 1,
+use that many characters.  If anything else, don't limit.  If the
+buffer name is longer than the max length, it will be shortened
+and appended with `truncate-string-ellipsis'."
+  :type '(choice (const :tag "No maximum length" 0)
+                 (natnum :tag "Number of characters")
+                 (float :tag "Fraction of window's width")))
+
 (defun +modeline-buffer-name (&optional spacer)         ; gonsie
   "Display the buffer name."
   (let ((bufname (string-trim (string-replace "%" "" (buffer-name)))))
     (concat (or spacer +modeline-default-spacer)
-            (propertize bufname
-             'help-echo (or (buffer-file-name)
-                            (buffer-name))
-             'mouse-face 'mode-line-highlight))))
+            (propertize (cond
+                         ((ignore-errors
+                            (and (> +modeline-buffer-name-max-length 0)
+                                 (< +modeline-buffer-name-max-length 1)))
+                          (truncate-string-to-width bufname
+                                                    (* (window-total-width) +modeline-buffer-name-max-length)
+                                                    nil nil t))
+                         ((ignore-errors
+                            (> +modeline-buffer-name-max-length 1))
+                          (truncate-string-to-width bufname
+                                                    +modeline-buffer-name-max-length
+                                                    nil nil t))
+                         (t bufname))
+                        'help-echo (or (buffer-file-name)
+                                       (buffer-name))
+                        'mouse-face 'mode-line-highlight))))
 
 (defcustom +modeline-minions-icon "&"
   "The \"icon\" for `+modeline-minions' button."
@@ -188,20 +210,49 @@ The order of elements matters: whichever one matches first is applied."
   "Toggle the percentage display in the mode line (File Percentage Mode)."
   :init-value t :global t :group 'mode-line)
 
+(defun +modeline--percentage ()
+  "Return point's progress through current file as a percentage."
+  (let ((tot (count-screen-lines (point-min) (point-max) :ignore-invisible)))
+    (floor (* 100 (/ (float (line-number-at-pos)) tot)))))
+
+(defun +modeline--buffer-contained-in-window-p ()
+  "Whether the buffer is totally contained within its window."
+  (let ((window-min (save-excursion (move-to-window-line 0) (point)))
+        (window-max (save-excursion (move-to-window-line -1) (point))))
+    (and (<= window-min (point-min))
+         (>= window-max (point-max)))))
+
 (defun +modeline-file-percentage (&optional spacer)
   "Display the position in the current file."
   (when file-percentage-mode
-    (let* ((tot (count-lines (point-min) (point-max) :ignore-invisible))
-           (perc (/ (* 100 (line-number-at-pos)) tot))
-           (window-min (save-excursion (move-to-window-line 0)
-                                       (point)))
-           (window-max (save-excursion (move-to-window-line -1)
-                                       (point))))
+    ;; (let ((perc (+modeline--percentage)))
+    ;;   (propertize (concat (or spacer +modeline-default-spacer)
+    ;;                       (cond
+    ;;                        ((+modeline--buffer-contained-in-window-p) "All")
+    ;;                        ((= (line-number-at-pos) (line-number-at-pos (point-min))) "Top")
+    ;;                        ((= (line-number-at-pos) (line-number-at-pos (point-max))) "Bot")
+    ;;                        ;; Why the 10 %s?  Not sure.  `format' knocks them
+    ;;                        ;; down to 5, then `format-mode-line' kills all but
+    ;;                        ;; two.  If I use only 8, the margin is much too
+    ;;                        ;; large.  Something else is obviously going on, but
+    ;;                        ;; I'm at a loss as to what it could be.
+    ;;                        (t (format "%d%%%%%%%%%%" perc))))
+    ;;               ;; TODO: add scroll-up and scroll-down bindings.
+    ;;               ))
+    (let ((perc (format-mode-line '(-3 "%p"))))
+      (concat (or spacer +modeline-default-spacer)
+              perc
+              (unless (seq-some (lambda (s) (string= perc s))
+                                '("Top" "Bot" "All"))
+                "%%%%")))))
+
+(defun +modeline-file-percentage-icon (&optional spacer)
+  "Display the position in the current file as an icon."
+  (when file-percentage-mode
+    (let ((perc (+modeline--percentage)))
       (propertize (concat (or spacer +modeline-default-spacer)
                           (cond
-                           ((and (<= window-min (point-min))
-                                 (>= window-max (point-max)))
-                            "█")
+                           ((+modeline--buffer-contained-in-window-p) "⏹")
                            ((= perc 0)   "▇")
                            ((< perc 20)  "▆")
                            ((< perc 40)  "▅")
@@ -231,24 +282,37 @@ The order of elements matters: whichever one matches first is applied."
                           'font-lock-face 'font-lock-variable-name-face))
     ""))
 
+(defun +modeline-line (&optional spacer)
+  (when line-number-mode
+    (concat (or spacer +modeline-default-spacer) "%2l")))
+
+(defun +modeline-column (&optional spacer)
+  (when column-number-mode
+    (concat (or spacer +modeline-default-spacer)
+            (if column-number-indicator-zero-based "%2c" "%2C"))))
+
 (defun +modeline-line-column (&optional spacer) ; adapted from `simple-modeline'
   "Display the current cursor line and column depending on modes."
-  (let ((sep "|") (before "") (after "")
-        (line-fmt (if line-number-mode "%2l" ""))
-        (col-fmt (if column-number-mode
-                     (if column-number-indicator-zero-based
-                         "%2c"
-                       "%2C")
-                   "")))
-    (concat (or spacer +modeline-default-spacer)
-            before line-fmt sep col-fmt after)))
+  (funcall (+modeline-concat '(+modeline-line
+                               +modeline-column)
+                             "|")))
+
+(defcustom +modeline-position-function nil
+  "Function to use instead of `+modeline-position' in modeline."
+  :type '(choice (const :tag "None" nil)
+                 function)
+  :local t)
 
 (defun +modeline-position (&optional _)
   "Display the current cursor position.
-See `line-number-mode', `column-number-mode', `file-percentage-mode'"
-  (append (+modeline-line-column)
-          (+modeline-region)
-          (+modeline-file-percentage)))
+See `line-number-mode', `column-number-mode', and
+`file-percentage-mode'.  If `+modeline-position-function' is set
+to a function in the current buffer, call that function instead."
+  (funcall (if +modeline-position-function
+               +modeline-position-function
+             (+modeline-concat '(+modeline-region
+                                 +modeline-line-column
+                                 +modeline-file-percentage)))))
 
 (defun +modeline-vc (&optional spacer)
   "Display the version control branch of the current buffer in the modeline."