Make jack.el use emms-compat.el rather than cl.el, and tidy up emms-compat.el

darcs-hash:20070105042701-1bfb2-0883b98f76b030dc45c5c8e975df8b12f4955204.gz

1 files changed, 55 insertions, 22 deletions

diff --git a/emms-compat.el b/emms-compat.el
index 36608a1..748f487 100644
--- a/emms-compat.el
+++ b/emms-compat.el
@@ -28,12 +28,18 @@
 
 ;;; Code:
 
+
+;;; Miscellaneous
+
 (defun emms-propertize (string &rest properties)
   (if (fboundp 'propertize)
       (apply #'propertize string properties)
     (set-text-properties 0 (length string) properties string)
     string))
 
+
+;;; Time and timers
+
 (defun emms-cancel-timer (timer)
   "Cancel the given TIMER."
   (when timer
@@ -48,6 +54,35 @@
       (and (= (car t1) (car t2))
            (< (nth 1 t1) (nth 1 t2)))))
 
+
+;;; Movement and position
+
+(defun emms-move-beginning-of-line (arg)
+  "Move point to beginning of current line as displayed.
+If there's an image in the line, this disregards newlines
+which are part of the text that the image rests on."
+  (if (fboundp 'move-beginning-of-line)
+      (move-beginning-of-line arg)
+    (if (numberp arg)
+        (forward-line (1- arg))
+      (forward-line 0))))
+
+(defun emms-line-number-at-pos (&optional pos)
+  "Return (narrowed) buffer line number at position POS.
+If POS is nil, use current buffer location."
+  (if (fboundp 'line-number-at-pos)
+      (line-number-at-pos pos)
+    (let ((opoint (or pos (point))) start)
+      (save-excursion
+        (goto-char (point-min))
+        (setq start (point))
+        (goto-char opoint)
+        (forward-line 0)
+        (1+ (count-lines start (point)))))))
+
+
+;;; Regular expression matching
+
 (defun emms-replace-regexp-in-string (regexp replacement text
                                       &optional fixedcase literal)
   "Replace REGEXP with REPLACEMENT in TEXT.
@@ -66,24 +101,14 @@ If fifth arg LITERAL is non-nil, insert REPLACEMENT literally."
                   text (replace-match replacement fixedcase literal text)))))
       text)))
 
-(defun emms-line-number-at-pos (&optional pos)
-  "Return (narrowed) buffer line number at position POS.
-If POS is nil, use current buffer location."
-  (if (fboundp 'line-number-at-pos)
-      (line-number-at-pos pos)
-    (let ((opoint (or pos (point))) start)
-      (save-excursion
-        (goto-char (point-min))
-        (setq start (point))
-        (goto-char opoint)
-        (forward-line 0)
-        (1+ (count-lines start (point)))))))
-
 (defun emms-match-string-no-properties (num &optional string)
   (if (fboundp 'match-string-no-properties)
       (match-string-no-properties num string)
     (match-string num string)))
 
+
+;;; Common Lisp
+
 (defun emms-delete-if (predicate seq)
   "Remove all items satisfying PREDICATE in SEQ.
 This is a destructive function: it reuses the storage of SEQ
@@ -103,15 +128,23 @@ whenever possible."
       (setq next (cdr ptr))))
   seq)
 
-(defun emms-move-beginning-of-line (arg)
-  "Move point to beginning of current line as displayed.
-If there's an image in the line, this disregards newlines
-which are part of the text that the image rests on."
-  (if (fboundp 'move-beginning-of-line)
-      (move-beginning-of-line arg)
-    (if (numberp arg)
-        (forward-line (1- arg))
-      (forward-line 0))))
+(defun emms-find-if (predicate seq)
+  "Find the first item satisfying PREDICATE in SEQ.
+Return the matching item, or nil if not found."
+  (catch 'found
+    (dolist (el seq)
+      (when (funcall predicate el)
+        (throw 'found el)))))
+
+(defun emms-remove-if-not (predicate seq)
+  "Remove all items not satisfying PREDICATE in SEQ.
+This is a non-destructive function; it makes a copy of SEQ to
+avoid corrupting the original SEQ."
+  (let (newseq)
+    (dolist (el seq)
+      (when (funcall predicate el)
+        (setq newseq (cons el newseq))))
+    (nreverse newseq)))
 
 (provide 'emms-compat)
 ;;; emms-compat.el ends here