Almost usable!

[elpher.git] / elopher.el

diff --git a/elopher.el b/elopher.el
index e33d821..871e2b2 100644 (file)
--- a/elopher.el
+++ b/elopher.el
@@ -12,39 +12,134 @@
 ;; (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)
 
-(defun elopher-filter (proc string)
+(defvar elopher-type-margin-width 5)
+
+(defvar elopher-history '())
+
+(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-make-clickable (string link-function mouse-help)
+  (let ((map (make-sparse-keymap)))
+    (define-key map [mouse-1] link-function)
+    (define-key map (kbd "RET") link-function)
+    (propertize string
+                'mouse-face 'highlight
+                'help-echo (concat "mouse-1: " mouse-help)
+                'keymap map)))
+
+(defun elopher-format-record (display-string margin-key color &optional getter help-text)
+  (elopher-type-margin margin-key)
+  (insert (propertize
+           (if getter
+               (elopher-make-clickable display-string
+                                       getter
+                                       help-text)
+             display-string)
+           'face `(foreground-color . ,color)))
+  (insert "\n"))
+
+(defun elopher-make-getter (func address)
+  (let ((selector (car address))
+        (hostname (cadr address))
+        (port (caddr address)))
+    `(lambda ()
+       (interactive)
+       (,func ,hostname ,port ,selector))))
+
+(defun elopher-make-help (address)
+  (let ((selector (car address))
+        (hostname (cadr address))
+        (port (caddr address)))
+    (format "open \"%s\" on %s port %s"
+            selector hostname port)))
+
+(defun elopher-process-record (line)
+  (let* ((type (elt line 0))
+         (fields (split-string (substring line 1) "\t"))
+         (display-string (elt fields 0))
+         (selector (elt fields 1))
+         (hostname (elt fields 2))
+         (port (elt fields 3))
+         (address (list selector hostname port)))
+    (pcase type
+      (?i (elopher-format-record display-string nil "white"))
+      (?0 (elopher-format-record display-string "T" "gray"
+                                 (elopher-make-getter 'elopher-get-text address)
+                                 (elopher-make-help address)))
+      (?1 (elopher-format-record display-string "/" "cyan"
+                                 (elopher-make-getter 'elopher-get-index address)
+                                 (elopher-make-help address))))))
+
+(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-index-filter (proc string)
   (with-current-buffer (get-buffer "*elopher*")
     (let ((marker (process-mark proc)))
       (if (not (marker-position marker))
           (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)
+  (setq elopher-incomplete-record "")
   (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 ""))))
+   :filter #'elopher-index-filter)
+  (process-send-string "elopher-process" (concat path "\n")))
+
+(defun elopher-text-filter (proc string)
+  (with-current-buffer (get-buffer "*elopher*")
+    (let ((marker (process-mark proc)))
+      (if (not (marker-position marker))
+          (set-marker marker 0 (current-buffer)))
+      (save-excursion
+        (goto-char marker)
+        (dolist (line (split-string string "\r"))
+          (insert line))
+        (set-marker marker (point))))))
+
+(defun elopher-get-text (host port selector)
+  (switch-to-buffer "*elopher*")
+  (erase-buffer)
+  (setq elopher-incomplete-record "")
+  (make-network-process
+   :name "elopher-process"
+   :host host
+   :service port
+   :filter #'elopher-text-filter)
+  (process-send-string "elopher-process" (concat selector "\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*"))