Read media viewer from settings

docs/settings.md

@@ -51,6 +51,21 @@ visibility = "unlisted"
 scheduled_in = "30 minutes"
 ```
 
+## TUI view images
+
+> Introduced in toot 0.39.0
+
+You can view images in a toot using an external program by setting the
+`tui.media_viewer` option to your desired image viewer. When a toot is focused,
+pressing `m` will launch the specified executable giving one or more URLs as
+arguments. This works well with image viewers like `feh` which accept URLs as
+arguments.
+
+```toml
+[tui]
+media_viewer = "feh"
+```
+
 ## TUI color palette
 
 TUI uses Urwid which provides several color modes. See

toot/tui/app.py

@@ -1,4 +1,5 @@
 import logging
+import subprocess
 import urwid
 
 from concurrent.futures import ThreadPoolExecutor
@@ -14,7 +15,7 @@ from .overlays import ExceptionStackTrace, GotoMenu, Help, StatusSource, StatusL
 from .overlays import StatusDeleteConfirmation, Account
 from .poll import Poll
 from .timeline import Timeline
-from .utils import get_max_toot_chars, parse_content_links, show_media, copy_to_clipboard
+from .utils import get_max_toot_chars, parse_content_links, copy_to_clipboard
 
 logger = logging.getLogger(__name__)
 
@@ -138,6 +139,7 @@ class TUI(urwid.Frame):
         self.can_translate = False
         self.account = None
         self.followed_accounts = []
+        self.media_viewer = settings.get_setting("tui.media_viewer", str)
 
         super().__init__(self.body, header=self.header, footer=self.footer)
 
@@ -498,8 +500,13 @@ class TUI(urwid.Frame):
 
     def show_media(self, status):
         urls = [m["url"] for m in status.original.data["media_attachments"]]
-        if urls:
-            show_media(urls)
+        if not urls:
+            return
+
+        if self.media_viewer:
+            subprocess.run([self.media_viewer] + urls)
+        else:
+            self.footer.set_error_message("Media viewer not configured")
 
     def show_context_menu(self, status):
         # TODO: show context menu

toot/tui/timeline.py

@@ -95,6 +95,7 @@ class Timeline(urwid.Columns):
             return None
 
         poll = status.original.data.get("poll")
+        show_media = status.original.data["media_attachments"] and self.tui.media_viewer
 
         options = [
             "[A]ccount" if not status.is_mine else "",
@@ -105,6 +106,8 @@ class Timeline(urwid.Columns):
             "[V]iew",
             "[T]hread" if not self.is_thread else "",
             "L[i]nks",
+            "[M]edia" if show_media else "",
+            self.tui.media_viewer,
             "[R]eply",
             "[P]oll" if poll and not poll["expired"] else "",
             "So[u]rce",

toot/tui/utils.py

@@ -1,12 +1,12 @@
 import base64
 import re
-import shutil
-import subprocess
 import urwid
 
-from functools import reduce
+from functools import lru_cache, reduce
 from html.parser import HTMLParser
-from typing import List
+from typing import List, Optional
+
+from toot import settings
 
 HASHTAG_PATTERN = re.compile(r'(?<!\w)(#\w+)\b')
 
@@ -47,33 +47,7 @@ def highlight_hashtags(line):
     return hline
 
 
-def show_media(paths):
-    """
-    Attempt to open an image viewer to show given media files.
-
-    FIXME: This is not very thought out, but works for me.
-    Once settings are implemented, add an option for the user to configure their
-    prefered media viewer.
-    """
-    viewer = None
-    potential_viewers = [
-        "feh",
-        "eog",
-        "display"
-    ]
-    for v in potential_viewers:
-        viewer = shutil.which(v)
-        if viewer:
-            break
-
-    if not viewer:
-        raise Exception("Cannot find an image viewer")
-
-    subprocess.run([viewer] + paths)
-
-
 class LinkParser(HTMLParser):
-
     def reset(self):
         super().reset()
         self.links = []