X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?a=blobdiff_plain;f=elopher.el;h=609876db1876a03eae17f6a8e7ae84f3768f1480;hb=e4e93510ae1b8adac371c955ff600afbade58c05;hp=b28120badf3bd3606ec96fd60ebf88f39282ee63;hpb=42b79ed99012e13fb25ce47a59272c20ab3f5d18;p=elpher.git

diff --git a/elopher.el b/elopher.el
index b28120b..609876d 100644
--- a/elopher.el
+++ b/elopher.el
@@ -7,57 +7,142 @@
 ;;; Code:
 
 ;; (defvar elopher-mode-map nil "Keymap for gopher client.")
-;; (define-key elopher-mode-map (kbd "p") 'elopher-quit)
 
 ;; (define-derived-mode elopher-mode special-mode "elopher"
 ;;   "Major mode for elopher, an elisp gopher client.")
 
-(defun )
+(defvar elopher-margin-width 5)
 
-(defun elopher-filter (proc string)
+(defun elopher-insert-margin (&optional type-name)
+  (if type-name
+      (insert (propertize
+               (format (concat "%" (number-to-string elopher-margin-width) "s")
+                       (concat "[" type-name "] "))
+               'face '(foreground-color . "yellow")))
+    (insert (make-string elopher-margin-width ?\s))))
+
+(defun elopher-follow-index-link (button)
+  (apply #'elopher-get-index (button-get button 'link-address)))
+
+(defun elopher-follow-text-link (button)
+  (apply #'elopher-get-text (button-get button 'link-address)))
+
+(defun elopher-follow-image-link (button)
+  (apply #'elopher-get-image (button-get button 'link-address)))
+
+(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-insert-margin)
+          (insert (propertize display-string
+                              'face '(foreground-color. "white"))))
+      (?0 (elopher-insert-margin "T")
+          (insert-text-button display-string
+                              'face '(foreground-color . "gray")
+                              'link-address address
+                              'action #'elopher-follow-text-link
+                              'follow-link t))
+      (?1 (elopher-insert-margin "/")
+          (insert-text-button display-string
+                              'face '(foreground-color . "cyan")
+                              'link-address address
+                              'action #'elopher-follow-index-link
+                              'follow-link t))
+      (?p (elopher-insert-margin "img")
+          (insert-text-button display-string
+                             'face '(foreground-color . "gray")
+                             'link-address address
+                             'action #'elopher-follow-image-link
+                             'follow-link t))
+      (?.) ; Occurs at end of index, can safely ignore.
+      (tp (elopher-insert-margin (concat (char-to-string tp) "?"))
+          (insert (propertize display-string
+                              'face '(foreground-color . "red")))))
+    (insert "\n")))
+
+(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))
+          (let ((line (elt lines idx)))
+            (unless (string-empty-p line)
+              (elopher-process-record line)))
+        (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*")
+(defun elopher-get-index (selector host port)
+  (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 selector "\n")))
 
-(defun elopher ()
-  "Start gopher client."
-  (interactive)
-  (elopher-get-index (read-from-minibuffer "Gopher host: ") 70))
+(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 (selector host port)
+  (switch-to-buffer "*elopher*")
+  (erase-buffer)
+  (make-network-process
+   :name "elopher-process"
+   :host host
+   :service port
+   :filter #'elopher-text-filter)
+  (process-send-string "elopher-process" (concat selector "\n")))
 
-(elopher-get-index "cosmic.voyage")
+(defvar elopher-image-buffer "")
 
-(format "%s\n" nil)
+(defun elopher-image-filter (proc string)
+  (setq elopher-image-buffer (concat elopher-image-buffer string)))
 
-(delete-process "elopher-process")
-  
-  ;; (address (read-from-minibuffer "Address of gopher server: ")))
-  ;; (message "Connecting to '%s' ..." address)
-  ;; (erase-buffer)
-  ;; (insert (propertize "Hello, world." 'face '(foreground-color . "red")))
-  ;; (newline)
-  ;; (insert (propertize "Hello, Tim." 'face '(foreground-color . "yellow"))))
+(defun elopher-get-image (selector host port)
+  (switch-to-buffer "*elopher*")
+  (erase-buffer)
+  (setq elopher-image-buffer "")
+  (make-network-process
+   :name "elopher-process"
+   :host host
+   :service port
+   :filter #'elopher-image-filter)
+  (process-send-string "elopher-process" (concat selector "\n"))
+  (insert-image (create-image elopher-image-buffer)))
 
-(defun elopher-quit ()
+(defun elopher ()
+  "Start gopher client."
   (interactive)
-  (kill-buffer "*elopher*"))
+  (elopher-get-index "" (read-from-minibuffer "Gopher host: ") 70))
 
-(start-process "ls" "*elopher*" "/bin/date")
+(elopher-get-index "" "cosmic.voyage" 70)
+;; (elopher-get-image "/fun/xkcd/comics/2130/2137/text_entry.png" "gopher.floodgap.com" 70)
 
 ;;; elopher.el ends here
-
-(list-processes)