Add an action to display status links and open them

We add a new [L]inks action that opens an overlay window with links
found in the content of selected status. Links are selectable and upon
click/enter we open the web browser at link's URL.

toot/tui/app.py

@@ -8,10 +8,10 @@ from toot import api, __version__
 from .compose import StatusComposer
 from .constants import PALETTE
 from .entities import Status
-from .overlays import ExceptionStackTrace, GotoMenu, Help, StatusSource
+from .overlays import ExceptionStackTrace, GotoMenu, Help, StatusSource, StatusLinks
 from .overlays import StatusDeleteConfirmation
 from .timeline import Timeline
-from .utils import show_media
+from .utils import parse_content_links, show_media
 
 logger = logging.getLogger(__name__)
 
@@ -182,6 +182,9 @@ class TUI(urwid.Frame):
         def _source(timeline, status):
             self.show_status_source(status)
 
+        def _links(timeline, status):
+            self.show_links(status)
+
         def _media(timeline, status):
             self.show_media(status)
 
@@ -197,6 +200,7 @@ class TUI(urwid.Frame):
         urwid.connect_signal(timeline, "reblog", self.async_toggle_reblog)
         urwid.connect_signal(timeline, "reply", _reply)
         urwid.connect_signal(timeline, "source", _source)
+        urwid.connect_signal(timeline, "links", _links)
 
     def build_timeline(self, name, statuses):
         def _close(*args):
@@ -302,6 +306,14 @@ class TUI(urwid.Frame):
             title="Status source",
         )
 
+    def show_links(self, status):
+        links = parse_content_links(status.data["content"])
+        self.open_overlay(
+            widget=StatusLinks(links),
+            title="Status links",
+            options={"height": len(links) + 2},
+        )
+
     def show_exception(self, exception):
         self.open_overlay(
             widget=ExceptionStackTrace(exception),

toot/tui/overlays.py

@@ -20,6 +20,20 @@ class StatusSource(urwid.ListBox):
         super().__init__(walker)
 
 
+class StatusLinks(urwid.ListBox):
+    """Shows status links."""
+
+    def __init__(self, links):
+
+        def widget(url, title):
+            return Button(title or url, on_press=lambda btn: webbrowser.open(url))
+
+        walker = urwid.SimpleFocusListWalker(
+            [widget(url, title) for url, title in links]
+        )
+        super().__init__(walker)
+
+
 class ExceptionStackTrace(urwid.ListBox):
     """Shows an exception stack trace."""
     def __init__(self, ex):
@@ -132,6 +146,7 @@ class Help(urwid.Padding):
         yield urwid.Text(h("  [R] - Reply to current status"))
         yield urwid.Text(h("  [S] - Show text marked as sensitive"))
         yield urwid.Text(h("  [T] - Show status thread (replies)"))
+        yield urwid.Text(h("  [L] - Show the status links"))
         yield urwid.Text(h("  [U] - Show the status data in JSON as received from the server"))
         yield urwid.Text(h("  [V] - Open status in default browser"))
         yield urwid.Divider()

toot/tui/timeline.py

@@ -26,6 +26,7 @@ class Timeline(urwid.Columns):
         "reblog",     # Reblog status
         "reply",      # Compose a reply to a status
         "source",     # Show status source
+        "links",      # Show status links
         "thread",     # Show thread for status
     ]
 
@@ -140,6 +141,10 @@ class Timeline(urwid.Columns):
             self.refresh_status_details()
             return
 
+        if key in ("l", "L"):
+            self._emit("links", status)
+            return
+
         if key in ("t", "T"):
             self._emit("thread", status)
             return
@@ -281,6 +286,7 @@ class StatusDetails(urwid.Pile):
             "[F]avourite",
             "[V]iew",
             "[T]hread" if not self.in_thread else "",
+            "[L]inks",
             "[R]eply",
             "So[u]rce",
             "[H]elp",

toot/tui/utils.py

@@ -1,3 +1,4 @@
+from html.parser import HTMLParser
 import re
 import shutil
 import subprocess
@@ -74,3 +75,30 @@ def show_media(paths):
         raise Exception("Cannot find an image viewer")
 
     subprocess.run([viewer] + paths)
+
+
+class LinkParser(HTMLParser):
+
+    def reset(self):
+        super().reset()
+        self.links = []
+
+    def handle_starttag(self, tag, attrs):
+        if tag == "a":
+            href, title = None, None
+            for name, value in attrs:
+                if name == "href":
+                    href = value
+                if name == "title":
+                    title = value
+            if href:
+                self.links.append((href, title))
+
+
+def parse_content_links(content):
+    """Parse <a> tags from status's `content` and return them as a list of
+    (href, title), where `title` may be None.
+    """
+    parser = LinkParser()
+    parser.feed(content)
+    return parser.links[:]