Submission view up and running.

rtv/submission_viewer.py

@@ -0,0 +1,128 @@
+import praw
+import curses
+
+from content_generators import SubmissionContent, SubredditContent
+from utils import curses_session
+from viewer import BaseViewer
+
+class SubmissionViewer(BaseViewer):
+
+    def __init__(self, stdscr, content):
+
+        page_index, cursor_index = -1, 1
+        super(SubmissionViewer, self).__init__(
+            stdscr, content,
+            page_index=page_index, cursor_index=cursor_index)
+
+    def loop(self):
+
+        self.draw()
+        while True:
+            cmd = self.stdscr.getch()
+
+            if cmd == curses.KEY_UP:
+                self.move_cursor_up()
+                self.clear_input_queue()
+
+            elif cmd == curses.KEY_DOWN:
+                self.move_cursor_down()
+                self.clear_input_queue()
+
+            # Refresh page
+            elif cmd in (curses.KEY_F5, ord('r')):
+                self.content.reset()
+                self.stdscr.clear()
+                self.draw()
+
+            elif cmd == curses.KEY_RESIZE:
+                self.draw()
+
+            # Quit
+            elif cmd == ord('q'):
+                break
+
+            else:
+                curses.beep()
+
+    def draw(self):
+
+        n_rows, n_cols = self.stdscr.getmaxyx()
+        self._header_window = self.stdscr.derwin(1, n_cols, 0, 0)
+        self._content_window = self.stdscr.derwin(1, 0)
+
+        self.draw_header()
+        self.draw_content()
+        self.add_cursor()
+
+    def draw_item(self, win, data, inverted=False):
+
+        if data['type'] == 'MoreComments':
+            self.draw_more_comments(win, data)
+
+        elif data['type'] == 'Comment':
+            self.draw_comment(win, data, inverted=inverted)
+
+        else:
+            self.draw_submission(win, data)
+
+    @staticmethod
+    def draw_comment(win, data, inverted=False):
+
+        n_rows, n_cols = win.getmaxyx()
+        n_cols -= 2
+
+        # Handle the case where the window is not large enough to fit the data.
+        valid_rows = range(0, n_rows)
+        offset = 0 if not inverted else -(data['n_rows'] - n_rows)
+
+        row = offset
+        text = '{} {} {}'.format(data['author'], data['score'], data['created'])
+        if row in valid_rows:
+            win.addnstr(row, 1, text, n_cols)
+
+        n_body = len(data['split_body'])
+        for row, text in enumerate(data['split_body'], start=offset+1):
+            if row in valid_rows:
+                win.addnstr(row, 1, text, n_cols)
+
+        # Vertical line, unfortunately vline() doesn't support custom color so
+        # we have to build it one chr at a time.
+        for y in xrange(n_rows):
+            win.addch(y, 0, curses.ACS_VLINE)
+
+    @staticmethod
+    def draw_more_comments(win, data):
+
+        n_rows, n_cols = win.getmaxyx()
+        n_cols -= 2
+        win.addnstr(0, 1, data['body'], n_cols)
+
+        for y in xrange(n_rows):
+            win.addch(y, 0, curses.ACS_VLINE)
+
+    @staticmethod
+    def draw_submission(win, data):
+
+        n_rows, n_cols = win.getmaxyx()
+        n_cols -= 1
+
+        # Don't print anything if there is not enough room
+        if data['n_rows'] > n_rows:
+            return
+
+        win.border()
+
+
+def main():
+
+    with curses_session() as stdscr:
+        r = praw.Reddit(user_agent='reddit terminal viewer (rtv) v0.0')
+        submission = SubredditContent(r).get(0)['object']
+        generator = SubmissionContent(submission)
+
+        viewer = SubmissionViewer(stdscr, generator)
+        viewer.loop()
+
+if __name__ == '__main__':
+
+    main()