[PATCH 2/2] notmuch.el:notmuch-search-process-filter: Rewritten. Cope with incomplete lines.

[Thomas Schwinge]

This issue has been lying in ambush as of 2009-11-24's commit
93af7b574598637c2766dd1f8ef343962c9a8efb.

Signed-off-by: Thomas Schwinge <thomas at schwinge.name>
---
 emacs/notmuch.el |   70 +++++++++++++++++++++++++++++++----------------------
 1 files changed, 41 insertions(+), 29 deletions(-)

diff --git a/emacs/notmuch.el b/emacs/notmuch.el
index 3d82f0d..35ccee6 100644
--- a/emacs/notmuch.el
+++ b/emacs/notmuch.el
@@ -641,9 +641,6 @@ non-authors is found, assume that all of the authors match."
     (propertize authors 'face 'notmuch-search-matching-authors)))
 
 (defun notmuch-search-insert-authors (format-string authors)
-  ;; Save the match data to avoid interfering with
-  ;; `notmuch-search-process-filter'.
-  (save-match-data
     (let* ((formatted-authors (format format-string authors))
 	   (formatted-sample (format format-string ""))
 	   (visible-string formatted-authors)
@@ -709,7 +706,7 @@ non-authors is found, assume that all of the authors match."
 	  (setq overlay (make-overlay start (point)))
 	  (overlay-put overlay 'invisible invis-spec)
 	  (overlay-put overlay 'isearch-open-invisible #'notmuch-search-isearch-authors-show)))
-      (insert padding))))
+      (insert padding)))
 
 (defun notmuch-search-insert-field (field date count authors subject tags)
   (cond
@@ -736,6 +733,10 @@ non-authors is found, assume that all of the authors match."
 	  do (notmuch-search-insert-field field date count authors subject tags)))
   (insert "\n"))
 
+(defvar notmuch-search-process-filter-data nil
+  "Data that has not yet been processed.")
+(make-variable-buffer-local 'notmuch-search-process-filter-data)
+
 (defun notmuch-search-process-filter (proc string)
   "Process and filter the output of \"notmuch search\""
   (let ((buffer (process-buffer proc))
@@ -743,31 +744,41 @@ non-authors is found, assume that all of the authors match."
     (if (buffer-live-p buffer)
 	(with-current-buffer buffer
 	  (save-excursion
-	    (let ((line 0)
-		  (more t)
-		  (inhibit-read-only t))
-	      (while more
-		(if (string-match "^\\(thread:[0-9A-Fa-f]*\\) \\([^][]*\\) \\(\\[[0-9/]*\\]\\) \\([^;]*\\); \\(.*\\) (\\([^()]*\\))$" string line)
-		    (let* ((thread-id (match-string 1 string))
-			   (date (match-string 2 string))
-			   (count (match-string 3 string))
-			   (authors (match-string 4 string))
-			   (subject (match-string 5 string))
-			   (tags (match-string 6 string))
-			   (tag-list (if tags (save-match-data (split-string tags)))))
-		      (goto-char (point-max))
-		      (let ((beg (point-marker)))
-			(notmuch-search-show-result date count authors subject tags)
-			(notmuch-search-color-line beg (point-marker) tag-list)
-			(put-text-property beg (point-marker) 'notmuch-search-thread-id thread-id)
-			(put-text-property beg (point-marker) 'notmuch-search-authors authors)
-			(put-text-property beg (point-marker) 'notmuch-search-subject subject)
-			(if (string= thread-id notmuch-search-target-thread)
-			    (progn
-			      (set 'found-target beg)
-			      (set 'notmuch-search-target-thread "found"))))
-		      (set 'line (match-end 0)))
-		  (set 'more nil)))))
+	    (let ((inhibit-read-only t)
+		  ;; We may have a partial line saved from the last iteration.
+		  (string (concat notmuch-search-process-filter-data string))
+		  (start 0))
+	      (goto-char (point-max))
+	      ;; Split `string' into lines.
+	      (while (string-match "\n" string start)
+		(let ((line (substring string start (match-beginning 0))))
+		  ;; Save the beginning of the next line already here, so that
+		  ;; we can mangle the match data later on.
+		  (setq start (match-end 0))
+		  (if (string-match
+		       "^\\(thread:[0-9A-Fa-f]*\\) \\([^][]*\\) \\(\\[[0-9/]*\\]\\) \\([^;]*\\); \\(.*\\) (\\([^()]*\\))$"
+		       line)
+		      (let* ((thread-id (match-string 1 line))
+			     (date (match-string 2 line))
+			     (count (match-string 3 line))
+			     (authors (match-string 4 line))
+			     (subject (match-string 5 line))
+			     (tags (match-string 6 line))
+			     (tag-list (if tags (split-string tags))))
+			(let ((beg (point-marker)))
+			  (notmuch-search-show-result date count authors subject tags)
+			  (notmuch-search-color-line beg (point-marker) tag-list)
+			  (put-text-property beg (point-marker) 'notmuch-search-thread-id thread-id)
+			  (put-text-property beg (point-marker) 'notmuch-search-authors authors)
+			  (put-text-property beg (point-marker) 'notmuch-search-subject subject)
+			  (if (string= thread-id notmuch-search-target-thread)
+			      (setq found-target beg
+				    notmuch-search-target-thread "found"))))
+		    ;; Non-conforming line.
+		    (insert (concat "Non-conforming line (ignored): <" line ">.\n")))))
+	      ;; Save the remainder after the last line break for the next
+	      ;; interation.
+	      (setq notmuch-search-process-filter-data (substring string start))))
 	  (if found-target
 	      (goto-char found-target)))
       (delete-process proc))))
@@ -858,6 +869,7 @@ The optional parameters are used as follows:
 		       "--sort=newest-first")
 		     query)))
 	  (set-process-sentinel proc 'notmuch-search-process-sentinel)
+	  (setq notmuch-search-process-filter-data nil)
 	  (set-process-filter proc 'notmuch-search-process-filter))))
     (run-hooks 'notmuch-search-hook)))
 
-- 
1.7.1