Added text links.

[elpher.git] / elopher.el

diff --git a/elopher.el b/elopher.el
index fd0e910..9d45428 100644 (file)
--- a/elopher.el
+++ b/elopher.el
@@ -12,45 +12,129 @@
 ;; (define-derived-mode elopher-mode special-mode "elopher"
 ;;   "Major mode for elopher, an elisp gopher client.")
 
-(defvar my-marker nil)
+;; (global-set-key (kbd "C-c C-b") 'eval-buffer)
 
-(defun my-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-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
+           (elopher-make-clickable display-string
+                                  `(lambda () (interactive)
+                                     (elopher-get-text ,hostname ,port ,selector))
+                                  (format "open \"%s\" on %s port %s"
+                                          selector hostname port))
+           'face '(foreground-color . "gray")))
+  (insert "\n"))
+
+(defun elopher-format-1 (display-string selector hostname port)
+  (elopher-type-margin "/")
+  (insert (propertize
+           (elopher-make-clickable display-string
+                                   `(lambda () (interactive)
+                                      (elopher-get-index ,hostname ,port ,selector))
+                                   (format "follow link to \"%s\" on %s port %s"
+                                           selector hostname port))
+           'face '(foreground-color . "cyan")))
+  (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-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 . "yellow")))
+        (elopher-process-complete-records string)
         (set-marker marker (point))))))
     
+(defun elopher-get-index (host &optional port path)
+  (switch-to-buffer "*elopher*")
+  (erase-buffer)
+  (make-network-process
+   :name "elopher-process"
+   :host host
+   :service (if port port 70)
+   :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)
+        (insert string)
+        (set-marker marker (point))))))
+
+(defun elopher-get-text (host port selector)
+  (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")))
 
 (defun elopher ()
   "Start gopher client."
   (interactive)
-  (switch-to-buffer-other-window "*elopher*")
-  (setq my-marker (make-marker))
-  (erase-buffer)
-  (make-process
-   :name "date"
-   :command (list "/bin/ls" "-l" "/")
-   :filter #'my-filter))
-
-(elopher)
-  
-  ;; (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"))))
+  (elopher-get-index (read-from-minibuffer "Gopher host: ") 70))
+
+(elopher-get-index "cosmic.voyage")
+;; (elopher-get-index "gopher.floodgap.com")
+;; (elopher-get-index "maurits.id.au")
 
 (defun elopher-quit ()
   (interactive)
   (kill-buffer "*elopher*"))
 
-(start-process "ls" "*elopher*" "/bin/date")
-
 ;;; elopher.el ends here
-
-(list-processes)