From 57a70c23cb1e71dd32594692a060378a7d49d02f Mon Sep 17 00:00:00 2001
From: Karthik Chikmagalur <karthikchikmagalur@gmail.com>
Date: Tue, 7 Nov 2023 21:19:25 -0800
Subject: [PATCH] gptel: Skip to end of word before sending

* gptel.el (gptel--at-word-end, gptel-send, gptel-request):
Include the word the cursor is on in the prompt, and don't break
it when inserting the response.  This is primarily useful for
evil-mode users who frequenty end up one char before the end of a
word when they switch to normal-mode.

* gptel-transient.el (gptel-send): Same.  Also fix bug with
selecting an existing buffer to send the response to.
---
 gptel-transient.el |  6 +++---
 gptel.el           | 10 ++++++++--
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/gptel-transient.el b/gptel-transient.el
index 30496a8..ec18779 100644
--- a/gptel-transient.el
+++ b/gptel-transient.el
@@ -415,7 +415,7 @@ will get progressively longer!"
                                                       'gptel)
                                t))
                             (point))
-                          (point))))))
+                          (gptel--at-word-end (point)))))))
       (with-current-buffer buffer
         (setq gptel-backend backend)
         (gptel--update-header-line " Waiting..." 'warning)
@@ -423,7 +423,7 @@ will get progressively longer!"
       (setq output-to-other-buffer-p t))
      ((setq gptel-buffer-name
             (cl-some (lambda (s) (and (string-prefix-p "e" s)
-                                 (substring s 2)))
+                                 (substring s 1)))
                      args))
       (setq buffer (get-buffer gptel-buffer-name))
       (setq output-to-other-buffer-p t)
@@ -440,7 +440,7 @@ will get progressively longer!"
                                                 'gptel)
                          t))
                       (point))
-                    (point))))))
+                    (gptel--at-word-end (point)))))))
         (with-current-buffer buffer
           (goto-char (point-max))
           (if (or buffer-read-only
diff --git a/gptel.el b/gptel.el
index c91db71..3d01906 100644
--- a/gptel.el
+++ b/gptel.el
@@ -387,6 +387,12 @@ and \"apikey\" as USER."
   "Ensure VAL is a number."
   (if (stringp val) (string-to-number val) val))
 
+(defmacro gptel--at-word-end (&rest body)
+  "Execute BODY at end of the current word or punctuation."
+  `(save-excursion
+     (skip-syntax-forward "w.")
+     ,@body))
+
 (defun gptel-prompt-string ()
   (or (alist-get major-mode gptel-prompt-prefix-alist) ""))
 
@@ -621,7 +627,7 @@ Model parameters can be let-bound around calls to this function."
            ((null position)
             (if (use-region-p)
                 (set-marker (make-marker) (region-end))
-              (point-marker)))
+              (gptel--at-word-end (point-marker))))
            ((markerp position) position)
            ((integerp position)
             (set-marker (make-marker) position buffer))))
@@ -658,7 +664,7 @@ instead."
   (let* ((response-pt
           (if (use-region-p)
               (set-marker (make-marker) (region-end))
-            (point-marker)))
+            (gptel--at-word-end (point-marker))))
          (gptel-buffer (current-buffer))
          (full-prompt (gptel--create-prompt response-pt)))
     (funcall