(occur): Set tab-width in the *Occur* buffer to the

value of tab-width in the original buffer.  Choose a line number
format that's a multiple of the original buffer's tab width, so
that lines appear right.

diff --git a/lisp/replace.el b/lisp/replace.el
index b41f2b7109610ba22aecfcee9e0d542a93c1119f..66636452fee49206a1a91bec090266017cc215f1 100644 (file)
--- a/lisp/replace.el
+++ b/lisp/replace.el
@@ -512,24 +512,38 @@ the matching is case-sensitive."
                (setq input default))
           input)
         current-prefix-arg))
-  (let ((nlines (if nlines
-                   (prefix-numeric-value nlines)
-                 list-matching-lines-default-context-lines))
-       (first t)
-       ;;flag to prevent printing separator for first match
-       (occur-num-matches 0)
-       (buffer (current-buffer))
-       (dir default-directory)
-       (linenum 1)
-       (prevpos
-        ;;position of most recent match
-        (point-min))
-       (case-fold-search  (and case-fold-search
-                               (isearch-no-upper-case-p regexp t)))
-       (final-context-start
-        ;; Marker to the start of context immediately following
-        ;; the matched text in *Occur*.
-        (make-marker)))
+  (let* ((nlines (if nlines
+                    (prefix-numeric-value nlines)
+                  list-matching-lines-default-context-lines))
+        (current-tab-width tab-width)
+        ;; Minimum width of line number plus trailing colon.
+        (min-line-number-width 6)
+        ;; Actual width of line number prefix.  Choose a width that's
+        ;; a multiple of `tab-width' in the original buffer so that
+        ;; lines in *Occur* appear right.
+        (line-number-width (* (/ (- (+ min-line-number-width
+                                       tab-width)
+                                    1)
+                                 tab-width)
+                              tab-width))
+        ;; Format string for line numbers.
+        (line-number-format (format "%%%dd" line-number-width))
+        (empty (make-string line-number-width ?\ ))
+        (first t)
+        ;;flag to prevent printing separator for first match
+        (occur-num-matches 0)
+        (buffer (current-buffer))
+        (dir default-directory)
+        (linenum 1)
+        (prevpos
+         ;;position of most recent match
+         (point-min))
+        (case-fold-search  (and case-fold-search
+                                (isearch-no-upper-case-p regexp t)))
+        (final-context-start
+         ;; Marker to the start of context immediately following
+         ;; the matched text in *Occur*.
+         (make-marker)))
 ;;;    (save-excursion
 ;;;      (beginning-of-line)
 ;;;      (setq linenum (1+ (count-lines (point-min) (point))))
@@ -567,32 +581,27 @@ the matching is case-sensitive."
                (setq linenum (+ linenum (count-lines prevpos (point)))))
              (setq prevpos (point))
              (goto-char (match-end 0))
-             (let* ((start
-                     ;;start point of text in source buffer to be put
-                     ;;into *Occur*
-                     (save-excursion
+             (let* (;;start point of text in source buffer to be put
+                    ;;into *Occur*
+                    (start (save-excursion
                              (goto-char (match-beginning 0))
                              (forward-line (if (< nlines 0)
                                                nlines
                                              (- nlines)))
                              (point)))
-                    (end
                      ;; end point of text in source buffer to be put
                      ;; into *Occur*
-                     (save-excursion
-                       (goto-char (match-end 0))
-                       (if (> nlines 0)
-                           (forward-line (1+ nlines))
-                         (forward-line 1))
-                       (point)))
-                    (match-beg
+                    (end (save-excursion
+                           (goto-char (match-end 0))
+                           (if (> nlines 0)
+                               (forward-line (1+ nlines))
+                             (forward-line 1))
+                           (point)))
                      ;; Amount of context before matching text
-                     (- (match-beginning 0) start))
-                    (match-len
+                    (match-beg (- (match-beginning 0) start))
                      ;; Length of matching text
-                     (- (match-end 0) (match-beginning 0)))
-                    (tag (format "%5d" linenum))
-                    (empty (make-string (length tag) ?\ ))
+                    (match-len (- (match-end 0) (match-beginning 0)))
+                    (tag (format line-number-format linenum))
                     tem
                     insertion-start
                     ;; Number of lines of context to show for current match.
@@ -605,8 +614,7 @@ the matching is case-sensitive."
                     (text-end
                      ;; Marker pointing to end of text for one match
                      ;; in *Occur*.
-                     (make-marker))
-                    )
+                     (make-marker)))
                (save-excursion
                  (setq occur-marker (make-marker))
                  (set-marker occur-marker (point))
@@ -615,6 +623,9 @@ the matching is case-sensitive."
                  (or first (zerop nlines)
                      (insert "--------\n"))
                  (setq first nil)
+                 (save-excursion
+                   (set-buffer "*Occur*")
+                   (setq tab-width current-tab-width))
 
                  ;; Insert matching text including context lines from
                  ;; source buffer into *Occur*
@@ -667,7 +678,7 @@ the matching is case-sensitive."
                  (let ((this-linenum linenum))
                    (while (< (point) final-context-start)
                      (if (null tag)
-                         (setq tag (format "%5d" this-linenum)))
+                         (setq tag (format line-number-format this-linenum)))
                      (insert tag ?:)
                      (forward-line 1)
                      (setq tag nil)