Updating theme styles preview code

docs/roadmap.md

@@ -10,9 +10,10 @@ If you have any feedback or suggestions, please open a new discussion on GitHub.
 
 - Keymaps. ✅
 - Pre-request and post-response scripts. ✅
-- Parse cURL commands.
+- Parse cURL commands. ✅
 - Watching environment files for changes & updating the UI. ✅
 - Editing key/value editor rows without having to delete/re-add them.
+- Realtime - WebSocket and SSE.
 - Quickly open MDN links for headers.
 - Templates. Create a `_template.posting.yaml` file (perhaps a checkbox in the new request modal for this). Any requests created in a collection will be based off of the nearest template (looking upwards to the collection root). Note that this is not "inheritance" - it's a means of quickly pre-filling values in requests based on a template request.
 - Saving recently used environments to a file.

src/posting/app.py

@@ -5,6 +5,7 @@
 from typing import Any, Literal, cast
 
 import httpx
+from textual.content import Content
 
 from posting.importing.curl import CurlImport
 from rich.console import Group
@@ -1008,7 +1009,7 @@ def command_layout(self, layout: Literal["vertical", "horizontal"]) -> None:
     def action_save_screenshot(
         self,
     ) -> str:
-        return self.save_screenshot()
+        self.search_themes()
 
     @on(CommandPalette.Opened)
     def palette_opened(self) -> None:
@@ -1029,22 +1030,15 @@ def palette_option_highlighted(
         if not self.settings.command_palette.theme_preview:
             return
 
-        prompt: Group = event.highlighted_event.option.prompt
-        # TODO: This is making quite a lot of assumptions. Fragile, but the only
-        # way I can think of doing it given the current Textual APIs.
-        command_name = prompt.renderables[0]
-        if isinstance(command_name, Text):
-            command_name = command_name.plain
-        command_name = command_name.strip()
-        if ":" in command_name:
-            name, value = command_name.split(":", maxsplit=1)
-            name = name.strip()
-            value = value.strip()
-            if name == "theme":
-                if value in self.themes:
-                    self.theme = value
+        prompt = event.highlighted_event.option.prompt
+        themes = self.available_themes.keys()
+        if isinstance(prompt, Content):
+            candidate = prompt.plain
+            if candidate in themes:
+                self.theme = candidate
             else:
                 self.theme = self._original_theme
+            self.call_next(self.screen._update_styles)
 
     @on(CommandPalette.Closed)
     def palette_closed(self, event: CommandPalette.Closed) -> None:

src/posting/posting.scss

@@ -435,6 +435,7 @@ Button {
 }
 
 CommandPalette {
+  background: black 20%;
 
   & > Vertical {
     margin-top: 5;

tests/test_snapshots.py

@@ -541,7 +541,7 @@ async def run_before(pilot: Pilot):
             await pilot.pause()  # wait for focus to switch
             await pilot.wait_for_scheduled_animations()
 
-        assert snap_compare(POSTING_MAIN, run_before=run_before, terminal_size=(80, 34))
+        assert snap_compare(POSTING_MAIN, run_before=run_before, terminal_size=(80, 60))
 
 
 @use_config("general.yaml")