Added urlview keybinding

1.  A shortcut of 'b' was used as the default binding for passing
comment body text to urlview (this is similar to the default of C-b in
the 'mutt' text email client)
2.  The `comment_urlview` SubmissionController function was added to
recieve the SUBMISSION_OPEN_IN_URLVIEWER keypress request.
3.  The `open_urlview` terminal function was added to handle the urlview
request.  It passes the comment body data to urlview via a Popen
process.
4.  A test case was added to ensure this new code path is executed
5.  Small formatting changes, mostly line length

CONTROLS.rst

@@ -60,3 +60,4 @@ In submission mode you can view the self text for a submission and browse commen
 :``l`` or ``►``: Open the selected comment in a new window
 :``o`` or ``ENTER``: Open the comment permalink with your web browser
 :``SPACE``: Fold the selected comment, or load additional comments
+:``b``: Displays URLs with urlview

README.rst

@@ -136,6 +136,34 @@ If you prefer the complete terminal experience, set ``$BROWSER`` to a console-ba
 
 `w3m <http://w3m.sourceforge.net/>`_, `lynx <http://lynx.isc.org/>`_, and `elinks <http://elinks.or.cz/>`_ are all good choices.
 
+----------
+Url Viewer
+----------
+
+You can open comment links using a url extraction binary.
+The ``$RTV_URLVIEWER`` environment variable can be used to set the url viewer.
+
+.. code-block:: bash
+
+    $ export RTV_URLVIEWER=urlview
+
+The default program is ``urlview``, but most systems do not come with it installed by default.
+
+Ubuntu
+------
+.. code-block:: bash
+
+    $ sudo apt-get install urlview
+
+Mac with Homebrew
+-----------------
+.. code-block:: bash
+
+    $ brew install urlview
+
+
+`urlview <https://github.com/sigpipe/urlview>`_, `urlscan <https://github.com/firecat53/urlscan>`_, are known to be compatible, but any program that accepts text via a stdin pipe will do
+
 ===
 FAQ
 ===

rtv/docs.py

@@ -44,6 +44,7 @@ HELP = """
   `h` or `LEFT`       : Return to subreddit mode
   `l` or `RIGHT`      : Open the selected comment in a new window
   `SPACE`             : Fold the selected comment, or load additional comments
+  `b`                 : Display URLs with urlview
 """
 
 COMMENT_FILE = """

rtv/rtv.cfg

@@ -112,6 +112,7 @@ SUBMISSION_OPEN_IN_BROWSER = o, <LF>, <KEY_ENTER>
 SUBMISSION_POST = c
 SUBMISSION_EXIT = h, <KEY_LEFT>
 SUBMISSION_OPEN_IN_PAGER = l, <KEY_RIGHT>
+SUBMISSION_OPEN_IN_URLVIEWER = b
 
 ; Subreddit page
 SUBREDDIT_SEARCH = f

rtv/submission.py

@@ -35,11 +35,11 @@ class SubmissionPage(Page):
         current_index = self.nav.absolute_index
         self.content.toggle(current_index)
 
-        # This logic handles a display edge case after a comment toggle. We want
+        # This logic handles a display edge case after a comment toggle. We
-        # to make sure that when we re-draw the page, the cursor stays at its
+        # want to make sure that when we re-draw the page, the cursor stays at
-        # current absolute position on the screen. In order to do this, apply
+        # its current absolute position on the screen. In order to do this,
-        # a fixed offset if, while inverted, we either try to hide the bottom
+        # apply a fixed offset if, while inverted, we either try to hide the
-        # comment or toggle any of the middle comments.
+        # bottom comment or toggle any of the middle comments.
         if self.nav.inverted:
             data = self.content.get(current_index)
             if data['hidden'] or self.nav.cursor_index != 0:
@@ -147,6 +147,15 @@ class SubmissionPage(Page):
         else:
             self.term.flash()
 
+    @SubmissionController.register(Command('SUBMISSION_OPEN_IN_URLVIEWER'))
+    def comment_urlview(self):
+        data = self.content.get(self.nav.absolute_index)
+        comment = data.get('body', '')
+        if comment:
+            self.term.open_urlview(comment)
+        else:
+            self.term.flash()
+
     def _draw_item(self, win, data, inverted):
 
         if data['type'] == 'MoreComments':
@@ -219,7 +228,8 @@ class SubmissionPage(Page):
         n_cols -= 1
 
         self.term.add_line(win, '{body}'.format(**data), 0, 1)
-        self.term.add_line(win, ' [{count}]'.format(**data), attr=curses.A_BOLD)
+        self.term.add_line(
+            win, ' [{count}]'.format(**data), attr=curses.A_BOLD)
 
         attr = Color.get_level(data['level'])
         self.term.addch(win, 0, 0, self.term.vline, attr)

rtv/terminal.py

@@ -349,7 +349,8 @@ class Terminal(object):
                                 'Browser exited with status=%s' % code)
                         time.sleep(0.01)
                     else:
-                        raise exceptions.BrowserError('Timeout opening browser')
+                        raise exceptions.BrowserError(
+                            'Timeout opening browser')
                 finally:
                     # Can't check the loader exception because the oauth module
                     # supersedes this loader and we need to always kill the
@@ -438,6 +439,20 @@ class Terminal(object):
             else:
                 _logger.info('File deleted: %s', filepath)
 
+    def open_urlview(self, data):
+        urlview = os.getenv('RTV_URLVIEWER') or 'urlview'
+        try:
+            with self.suspend():
+                p = subprocess.Popen([urlview],
+                                     stdin=subprocess.PIPE)
+                try:
+                    p.communicate(input=six.b(data))
+                except KeyboardInterrupt:
+                    p.terminate()
+        except OSError:
+            self.show_notification(
+                'Could not open urls with {}'.format(urlview))
+
     def text_input(self, window, allow_resize=False):
         """
         Transform a window into a text box that will accept user input and loop

scripts/rtv.1.template

@@ -28,6 +28,10 @@ for future sessions. You can disable this behavior by setting the option
 Text editor to use when editing comments and submissions. Will fallback to
 \fI$EDITOR\fR. 
 .TP
+.BR RTV_URLVIEWER
+Url Viewer to use to extract links from comments.  Requires a compatible 
+Url Viewer to be installed
+.TP
 .BR BROWSER
 Web browser to use when opening links.
 .TP

tests/cassettes/test_submission_urlview.yaml

@@ -0,0 +1,249 @@
+interactions:
+- request:
+    body: !!binary |
+      cmVkaXJlY3RfdXJpPWh0dHAlM0ElMkYlMkYxMjcuMC4wLjElM0E2NTAwMCUyRiZncmFudF90eXBl
+      PXJlZnJlc2hfdG9rZW4mcmVmcmVzaF90b2tlbj0qKioqKioqKioq
+    headers:
+      Accept: ['*/*']
+      Accept-Encoding: ['gzip, deflate']
+      Authorization: ['**********']
+      Connection: [keep-alive]
+      Content-Length: ['122']
+      Content-Type: [application/x-www-form-urlencoded]
+      Cookie: [__cfduid=d963647719488322ce24aaf79235c3d6e1449042300]
+      User-Agent: [rtv test suite PRAW/3.3.0 Python/3.4.0 b'Linux-3.13.0-24-generic-x86_64-with-Ubuntu-14.04-trusty']
+    method: POST
+    uri: https://api.reddit.com/api/v1/access_token/
+  response:
+    body:
+      string: !!binary |
+        H4sIAAAAAAAAAyWMsQrCQBAFf2W5WiFqDGqb0lYQq3DJPXSReMfuJvEU/12i1YNh5r2d7zqoNhbv
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+        u/jXENjoxmpRMnHAw9gy9VmHVhACm1ISHr2hh6q/QkngAwlSFCP1I0iHtmebRzvhFjRGg/t8AYx9
+        Bq7KAAAA
+    headers:
+      CF-RAY: [24e569649f492816-SJC]
+      Connection: [keep-alive]
+      Content-Encoding: [gzip]
+      Content-Type: [application/json; charset=UTF-8]
+      Date: ['Wed, 02 Dec 2015 07:45:20 GMT']
+      Server: [cloudflare-nginx]
+      Strict-Transport-Security: [max-age=15552000; includeSubDomains; preload]
+      X-Moose: [majestic]
+      cache-control: ['max-age=0, must-revalidate']
+      x-content-type-options: [nosniff]
+      x-frame-options: [SAMEORIGIN]
+      x-xss-protection: [1; mode=block]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      Accept: ['*/*']
+      Accept-Encoding: ['gzip, deflate']
+      Authorization: ['**********']
+      Connection: [keep-alive]
+      User-Agent: [rtv test suite PRAW/3.3.0 Python/3.4.0 b'Linux-3.13.0-24-generic-x86_64-with-Ubuntu-14.04-trusty']
+    method: GET
+    uri: https://oauth.reddit.com/api/v1/me.json
+  response:
+    body:
+      string: !!binary |
+        H4sIAAAAAAAAA12QwWrDMBBEf0Xs2YTYuLTxZ5TSq5CtdbNE2k1XUhoI/fei1C5xjxp23ozmBkeX
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+        Id8/dZfx5JkBAAA=
+    headers:
+      CF-RAY: [24e56971a0f811a7-SJC]
+      Connection: [keep-alive]
+      Content-Encoding: [gzip]
+      Content-Type: [application/json; charset=UTF-8]
+      Date: ['Wed, 02 Dec 2015 07:45:22 GMT']
+      Server: [cloudflare-nginx]
+      Set-Cookie: ['__cfduid=d667511ab17e019fb769e680b9cab23071449042322; expires=Thu,
+          01-Dec-16 07:45:22 GMT; path=/; domain=.reddit.com; HttpOnly']
+      Strict-Transport-Security: [max-age=15552000; includeSubDomains; preload]
+      X-Moose: [majestic]
+      cache-control: ['private, s-maxage=0, max-age=0, must-revalidate', 'max-age=0,
+          must-revalidate']
+      expires: ['-1']
+      x-content-type-options: [nosniff]
+      x-frame-options: [SAMEORIGIN]
+      x-ratelimit-remaining: ['586.0']
+      x-ratelimit-reset: ['278']
+      x-ratelimit-used: ['14']
+      x-xss-protection: [1; mode=block]
+    status: {code: 200, message: OK}
+- request:
+    body: null
+    headers:
+      Accept: ['*/*']
+      Accept-Encoding: ['gzip, deflate']
+      Authorization: ['**********']
+      Connection: [keep-alive]
+      Cookie: [__cfduid=d667511ab17e019fb769e680b9cab23071449042322]
+      User-Agent: [rtv test suite PRAW/3.3.0 Python/3.4.0 b'Linux-3.13.0-24-generic-x86_64-with-Ubuntu-14.04-trusty']
+    method: GET
+    uri: https://oauth.reddit.com/r/Python/comments/2xmo63/a_python_terminal_viewer_for_browsing_reddit/.json
+  response:
+    body:
+      string: !!binary |
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+version: 1

tests/test_submission.py

@@ -254,3 +254,28 @@ def test_submission_edit(submission_page, terminal, refresh_token):
         submission_page.controller.trigger('e')
         assert open_editor.called
         edit.assert_called_with('comment text')
+
+
+def test_submission_urlview(submission_page, terminal, refresh_token):
+
+    # Log in
+    submission_page.config.refresh_token = refresh_token
+    submission_page.oauth.authorize()
+
+    # Positive Case
+    data = submission_page.content.get(submission_page.nav.absolute_index)
+    TEST_BODY = 'test comment body'
+    data['body'] = TEST_BODY
+    with mock.patch.object(terminal, 'open_urlview') as open_urlview, \
+            mock.patch('subprocess.Popen'):
+        submission_page.controller.trigger('b')
+        open_urlview.assert_called_with(TEST_BODY)
+
+    # Negative Case
+    data = submission_page.content.get(submission_page.nav.absolute_index)
+    TEST_NO_BODY = ''
+    data['body'] = TEST_NO_BODY
+    with mock.patch.object(terminal, 'open_urlview') as open_urlview, \
+            mock.patch('subprocess.Popen'):
+        submission_page.controller.trigger('b')
+        assert not open_urlview.called