From 37c11b6c4959c1c4f3bcdf576d1148e72e01cb67 Mon Sep 17 00:00:00 2001
From: gramanas <anastasis.gramm2@gmail.com>
Date: Sun, 24 Mar 2019 17:08:39 +0200
Subject: Fix problems with elisp code

---
 fcomp.el | 91 +++++++++++++++++++++++++++++++++++++++++-----------------------
 1 file changed, 58 insertions(+), 33 deletions(-)

diff --git a/fcomp.el b/fcomp.el
index 5b9524b..66eaf7c 100644
--- a/fcomp.el
+++ b/fcomp.el
@@ -47,10 +47,18 @@
 (require 'ido)
 (require 'subr-x)
 
-(defvar fcomp-path "/usr/local/bin/fcomp")
-(defvar fcomp-min-word-length 3)
-(defvar fcomp-extra-valid-chars "")
-(defvar fcomp-extra-invalid-chars "")
+;; User variables
+
+(defvar fcomp-path "/usr/local/bin/fcomp"
+  "Path to fcomp executable.")
+(defvar fcomp-min-word-length 3
+  "Minimum word length to be counted as token.")
+(defvar fcomp-extra-valid-chars ""
+  "Extra valid chars for the tokenization.")
+(defvar fcomp-extra-invalid-chars ""
+  "Extra invalid chars for the tokenization.")
+(defvar fcomp-completing-read-func 'completing-read
+  "Function to call when showing results to user.")
 
 (defun empty-string-p (string)
   "Return true if the string is empty or nil. Expects string."
@@ -77,12 +85,13 @@
         (result nil))
     (if (empty-string-p fcomp--output)
         nil
-      (setq result (ido-completing-read
-                    "Complete:"
-                    (remove "" (split-string fcomp--output "\n"))
-                    nil nil
-                    initial-input)))
-    (if (empty-string-p result)
+      (setq result
+            (funcall fcomp-completing-read-func
+                     "Complete:"
+                     (remove "" (split-string fcomp--output "\n"))
+                     nil nil
+                     initial-input)))
+  (if (empty-string-p result)
         (message "%s" "No completion candidates")
       (insert (string-remove-prefix
                (if (empty-string-p initial-input)
@@ -92,6 +101,38 @@
     (setq fcomp--query "")
     (setq fcomp--output "")))
 
+(defun fcomp--autocomplete (word point)
+  "Start fcomp process and orchistrate it's output."
+  (let ((term (if (empty-string-p word)
+                  (format "%s" "-au")
+                (format "%s" word)))
+        (input-len (buffer-size)))
+    (fcomp--start word)
+    (setq proc
+          (start-process
+           "fcomp"
+           nil
+           (format "%s" fcomp-path)
+           "-w" (format "%s" fcomp-min-word-length)
+           "-v" (format "\"%s\"" fcomp-extra-valid-chars)
+           "-i" (format "\"%s\"" fcomp-extra-invalid-chars)
+           term))
+    (set-process-filter proc #'fcomp--filter)
+    (set-process-coding-system proc 'raw-text-unix 'raw-text-unix)
+    (process-put proc 'input-word word)
+    (if (< input-len 50000)
+        (process-send-region proc (point-min) (point-max))
+      (process-send-region proc
+                           (if (< (- point 25000) 0) (point-min) (- point 25000))
+                           (if (> (+ point 25000) input-len) (point-max) (+ point 25000))))
+    (process-send-string proc "\n")
+    (process-send-eof proc)
+    (if (accept-process-output proc nil nil t)
+        (fcomp--handle-output)
+      (progn
+        (message "No completion for %s" word)
+        (delete-process proc)))))
+
 (defun fcomp-autocomplete ()
   "Autocompete using fcomp.c
 
@@ -99,36 +140,20 @@ When `thing-at-point' is a word, autocomplete it based on buffer contents.
 
 When invoked with no `thing-at-point' show a list of all possible candidates.
 
+The syntax-table is temporarily modified and includes '_' '-' and
+`fcomp-extra-valid-chars' as part of a word.
+
 Requires fcomp. Get it at URL `https://ubuntos.dynu.net/git/fcomp'"
   ;; Thanks Dan for the syntax-table trick
   ;; https://emacs.stackexchange.com/questions/9583/how-to-treat-underscore-as-part-of-the-word
   (interactive)
   (let ((table (copy-syntax-table (syntax-table))))
     (modify-syntax-entry ?- "w" table)
+    (modify-syntax-entry ?_ "w" table)
+    (when (not (empty-string-p fcomp-extra-valid-chars))
+      (mapc (lambda (char) (modify-syntax-entry char "w" table)) fcomp-extra-valid-chars))
     (with-syntax-table table
-      (fcomp--autocomplete (thing-at-point 'word 'no-properties)))))
-
-(defun fcomp--autocomplete (word)
-  "Start fcomp process and orchistrate it's output."
-  (let ((term (if (empty-string-p word)
-                  (format "%s" "-a")
-                (format "%s" word)))
-        (input (buffer-substring-no-properties (point-min) (point-max))))
-    (fcomp--start word)
-    (set-process-filter
-     (start-process
-      "fcomp"
-      nil
-      (format "%s"fcomp-path)
-      "-w" (format "%s" fcomp-min-word-length)
-      "-F" (format "%s" input)
-      "-v" (format "%s" fcomp-extra-valid-chars)
-      "-i" (format "%s" fcomp-extra-invalid-chars)
-      term)
-     #'fcomp--filter)
-    (process-put (get-process "fcomp") 'input-word word)
-    (accept-process-output (get-process "fcomp"))
-    (fcomp--handle-output)))
+      (fcomp--autocomplete (thing-at-point 'word 'no-properties) (point)))))
 
 (provide 'fcomp)
 ;;; fcomp.el ends here
-- 
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