From ddef031a2c1d2fa02b63a41990f882587771ab79 Mon Sep 17 00:00:00 2001
From: Tim Vaughan <tgvaughan@gmail.com>
Date: Fri, 12 Apr 2019 17:59:04 +0200
Subject: [PATCH] Links are now clickable!

---
 elopher.el | 70 +++++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 61 insertions(+), 9 deletions(-)

diff --git a/elopher.el b/elopher.el
index e33d821..86e1950 100644
--- a/elopher.el
+++ b/elopher.el
@@ -12,7 +12,61 @@
 ;; (define-derived-mode elopher-mode special-mode "elopher"
 ;;   "Major mode for elopher, an elisp gopher client.")
 
-(defun )
+;; (global-set-key (kbd "C-c C-b") 'eval-buffer)
+
+(defvar elopher-type-margin-width 5)
+
+(defun elopher-type-margin (&optional type-name)
+  (if type-name
+      (insert (propertize
+               (format (concat "%" (number-to-string elopher-type-margin-width) "s")
+                       (concat "[" type-name "] "))
+               'face '(foreground-color . "yellow")))
+    (insert (make-string elopher-type-margin-width ?\s))))
+
+(defun elopher-format-i (display-string)
+  (elopher-type-margin)
+  (insert (propertize display-string 'face '(foreground-color . "white")))
+  (insert "\n"))
+
+(defun elopher-format-0 (display-string selector hostname port)
+  (elopher-type-margin "T")
+  (insert (propertize display-string 'face '(foreground-color . "gray")))
+  (insert "\n"))
+
+(defun elopher-format-1 (display-string selector hostname port)
+  (elopher-type-margin "/")
+  (let ((map (make-sparse-keymap)))
+    (define-key map [mouse-1]
+      (eval `(lambda () (interactive) (elopher-get-index ,hostname ,port ,selector))))
+    (insert (propertize display-string
+                        'face '(foreground-color . "cyan")
+                        'mouse-face 'highlight
+                        'help-echo "mouse-1: follow link"
+                        'keymap map))
+    (insert "\n")))
+
+(defun elopher-process-record (line)
+  (let* ((type (elt line 0))
+         (fields (split-string (substring line 1) "\t"))
+         (g-display-string (elt fields 0))
+         (g-selector (elt fields 1))
+         (g-hostname (elt fields 2))
+         (g-port (elt fields 3)))
+    (pcase type
+      (?i (elopher-format-i g-display-string))
+      (?0 (elopher-format-0 g-display-string g-selector g-hostname g-port))
+      (?1 (elopher-format-1 g-display-string g-selector g-hostname g-port)))))
+
+(defvar elopher-incomplete-record "")
+
+(defun elopher-process-complete-records (string)
+  (let* ((til-now (string-join (list elopher-incomplete-record string)))
+         (lines (split-string til-now "\r\n")))
+    (dotimes (idx (length lines))
+      (if (< idx (- (length lines) 1))
+          (elopher-process-record (elt lines idx))
+        (setq elopher-incomplete-record (elt lines idx))))))
 
 (defun elopher-filter (proc string)
   (with-current-buffer (get-buffer "*elopher*")
@@ -21,30 +75,28 @@
           (set-marker marker 0 (current-buffer)))
       (save-excursion
         (goto-char marker)
-        (insert (propertize string 'face '(foreground-color . "magenta")))
+        (elopher-process-complete-records string)
         (set-marker marker (point))))))
     
 (defun elopher-get-index (host &optional port path)
-  (switch-to-buffer-other-window "*elopher*")
+  (switch-to-buffer "*elopher*")
   (erase-buffer)
   (make-network-process
    :name "elopher-process"
    :host host
    :service (if port port 70)
    :filter #'elopher-filter)
-  (process-send-string "elopher-process" (format "%s\n" (if path path ""))))
+  (process-send-string "elopher-process" (concat path "\n")))
 
 (defun elopher ()
   "Start gopher client."
   (interactive)
   (elopher-get-index (read-from-minibuffer "Gopher host: ") 70))
 
-(elopher-get-index "cosmic.voyage")
-
-(format "%s\n" nil)
+;; (elopher-get-index "cosmic.voyage")
+(elopher-get-index "gopher.floodgap.com")
+;; (elopher-get-index "maurits.id.au")
 
-(delete-process "elopher-process")
-  
 (defun elopher-quit ()
   (interactive)
   (kill-buffer "*elopher*"))
-- 
2.20.1