[elpa] externals/luwak 9341d7ac6b 01/28: initial commit

[ELPA Syncer]

branch: externals/luwak
commit 9341d7ac6b29bb599209297534ed65e1e4fc091b
Author: Yuchen Pei <hi@ypei.me>
Commit: Yuchen Pei <hi@ypei.me>

    initial commit
---
 luwak.el | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/luwak.el b/luwak.el
new file mode 100644
index 0000000000..4fd69d5af5
--- /dev/null
+++ b/luwak.el
@@ -0,0 +1,50 @@
+;; -*- lexical-binding: t; -*-
+(defvar luwak-buffer "*luwak*")
+(defun luwak-lynx-buffer (url) (format "*luwak-lynx %s*" url))
+
+(defun luwak-open (url)
+  (interactive "sUrl to open: ")
+  (setq url (eww--dwim-expand-url url))
+  (set-process-sentinel
+   (start-process-with-torsocks
+    current-prefix-arg
+    "luwak-lynx" (luwak-lynx-buffer url)
+    "lynx" "-dump" "--display_charset" "utf-8" url)
+   (lambda (process _)
+     (with-current-buffer (get-buffer-create luwak-buffer)
+       (erase-buffer)
+       (insert-buffer-substring (process-buffer process))
+       (kill-buffer (process-buffer process))
+       (goto-char (point-min))
+       (luwak-render-links (luwak-get-links)))
+     (display-buffer luwak-buffer))))
+
+(defun luwak-follow-link (marker)
+  (luwak-open
+   (get-text-property marker 'url)))
+
+(defun luwak-render-links (urls)
+  (with-current-buffer luwak-buffer
+    (save-excursion
+      (goto-char (point-min))
+      (let ((i 1))
+        (dolist (url urls)
+          (when (re-search-forward (format "\\[%d\\]" i) nil t)
+            (replace-match "")
+            (make-text-button (point) (1+ (point))
+                              'url url
+                              'action 'luwak-follow-link
+                              'face 'button))
+          (setq i (1+ i)))))))
+
+(defun luwak-get-links ()
+  (with-current-buffer luwak-buffer
+    (save-excursion
+      (goto-char (point-min))
+      (re-search-forward "^References\n\n\\(\\ *Visible links:\n\\)?")
+      (let ((results))
+        (while (re-search-forward "^\\ *\\([0-9]+\\)\\.\\ *\\(.*\\)$" nil t)
+          (push (match-string 2) results))
+        (reverse results)))))
+
+(provide 'luwak)