Added license and readme.

[elpher.git] / elopher.el

diff --git a/elopher.el b/elopher.el
index cd1f7eb..871e2b2 100644 (file)
--- a/elopher.el
+++ b/elopher.el
@@ -16,6 +16,8 @@
 
 (defvar elopher-type-margin-width 5)
 
+(defvar elopher-history '())
+
 (defun elopher-type-margin (&optional type-name)
   (if type-name
       (insert (propertize
@@ -24,40 +26,57 @@
                '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")))
+(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-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 (format "mouse-1: follow link to \"%s\" on %s port %s"
-                                           selector hostname port)
-                        'keymap map))
-    (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"))
-         (g-display-string (elt fields 0))
-         (g-selector (elt fields 1))
-         (g-hostname (elt fields 2))
-         (g-port (elt fields 3)))
+         (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-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)))))
+      (?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 "")
 
@@ -69,7 +88,7 @@
           (elopher-process-record (elt lines idx))
         (setq elopher-incomplete-record (elt lines idx))))))
 
-(defun elopher-filter (proc string)
+(defun elopher-index-filter (proc string)
   (with-current-buffer (get-buffer "*elopher*")
     (let ((marker (process-mark proc)))
       (if (not (marker-position marker))
@@ -82,13 +101,36 @@
 (defun elopher-get-index (host &optional port path)
   (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)
+   :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)