buttons/keys/views: Introduce hotkey "c" for copying code snippets.

Introduces "c" hotkey to copy code snippets from the Message Information
popup. Updates hotkeys linting to exclude "c".
Tests updated.

Fixes #1123.

docs/hotkeys.md

@@ -64,6 +64,7 @@
 |View current message in browser (from message information)|<kbd>v</kbd>|
 |Show/hide full rendered message (from message information)|<kbd>f</kbd>|
 |Show/hide full raw message (from message information)|<kbd>r</kbd>|
+|Copy code snippet to clipboard (from message information)|<kbd>c</kbd>|
 
 ## Stream list actions
 |Command|Key Combination|

tests/ui_tools/test_popups.py

@@ -1117,13 +1117,14 @@ def test_keypress_view_in_browser(
         assert self.controller.open_in_browser.called
 
     def test_height_noreactions(self) -> None:
-        expected_height = 8
-        # 6 = 1 (date & time) +1 (sender's name) +1 (sender's email)
+        expected_height = 9
+        # 3 = 1 (date & time) +1 (sender's name) +1 (sender's email)
         # +1 (display group header)
         # +1 (whitespace column)
         # +1 (view message in browser)
         # +1 (full rendered message)
         # +1 (full raw message)
+        # +1 (copy code snippet)
         assert self.msg_info_view.height == expected_height
 
     # FIXME This is the same parametrize as MessageBox:test_reactions_view
@@ -1192,9 +1193,9 @@ def test_height_reactions(
             list(),
             list(),
         )
-        # 12 = 7 labels + 2 blank lines + 1 'Reactions' (category)
+        # 11 = 8 labels + 2 blank lines + 1 'Reactions' (category)
         # + 4 reactions (excluding 'Message Links').
-        expected_height = 14
+        expected_height = 15
         assert self.msg_info_view.height == expected_height
 
     @pytest.mark.parametrize(

tools/lint-hotkeys

@@ -19,7 +19,7 @@ SCRIPT_NAME = PurePath(__file__).name
 HELP_TEXT_STYLE = re.compile(r"^[a-zA-Z /()',&@#:_-]*$")
 
 # Exclude keys from duplicate keys checking
-KEYS_TO_EXCLUDE = ["q", "e", "m", "r"]
+KEYS_TO_EXCLUDE = ["q", "e", "m", "r", "c"]
 
 
 def main(fix: bool) -> None:

zulipterminal/config/keys.py

@@ -405,6 +405,13 @@ class KeyBinding(TypedDict):
         'help_text': 'Show/hide full raw message (from message information)',
         'key_category': 'msg_actions',
     },
+    'COPY_CODE_SNIPPET': {
+        'keys': ['c'],
+        'help_text':
+            'Copy code snippet to clipboard (from message information)',
+        'excluded_from_random_tips': True,
+        'key_category': 'msg_actions'
+    },
 }
 # fmt: on
 

zulipterminal/ui_tools/buttons.py

@@ -742,6 +742,13 @@ def extract_display_code(self, snippet_list: List[Tuple[str, str]]) -> None:
             )
         self.display_code = [("pygments:w", self.caption)] + self.display_code
 
+    def keypress(self, size: urwid_Size, key: str) -> Optional[str]:
+        if is_command_key("COPY_CODE_SNIPPET", key):
+            urwid.emit_signal(
+                self, "click", lambda button: self.copy_to_clipboard(self.snippet_list)
+            )
+        return super().keypress(size, key)
+
 
 class EditModeButton(urwid.Button):
     def __init__(self, *, controller: Any, width: int) -> None:

zulipterminal/ui_tools/views.py

@@ -1582,6 +1582,9 @@ def __init__(
         full_raw_message_keys = "[{}]".format(
             ", ".join(map(str, display_keys_for_command("FULL_RAW_MESSAGE")))
         )
+        copy_code_keys = "[{}]".format(
+            ", ".join(map(str, display_keys_for_command("COPY_CODE_SNIPPET")))
+        )
         msg_info = [
             (
                 "",
@@ -1600,6 +1603,7 @@ def __init__(
                 ("Open in web browser", view_in_browser_keys),
                 ("Full rendered message", full_rendered_message_keys),
                 ("Full raw message", full_raw_message_keys),
+                ("Copy code snippet", copy_code_keys),
             ],
         )
         msg_info.append(viewing_actions)