Allow matching on window/tab state

kitty/boss.py

@@ -346,7 +346,9 @@ class Boss:
         def get_matches(location: str, query: str, candidates: Set[int]) -> Set[int]:
             return {wid for wid in candidates if self.window_id_map[wid].matches_query(location, query, tab)}
 
-        for wid in search(match, ('id', 'title', 'pid', 'cwd', 'cmdline', 'num', 'env', 'recent',), set(self.window_id_map), get_matches):
+        for wid in search(match, (
+                'id', 'title', 'pid', 'cwd', 'cmdline', 'num', 'env', 'recent', 'state'
+        ), set(self.window_id_map), get_matches):
             yield self.window_id_map[wid]
 
     def tab_for_window(self, window: Window) -> Optional[Tab]:
@@ -365,7 +367,9 @@ class Boss:
             return {wid for wid in candidates if tim[wid].matches_query(location, query, tm)}
 
         found = False
-        for tid in search(match, ('id', 'index', 'title', 'window_id', 'window_title', 'pid', 'cwd', 'env', 'cmdline', 'recent',), set(tim), get_matches):
+        for tid in search(match, (
+                'id', 'index', 'title', 'window_id', 'window_title', 'pid', 'cwd', 'env', 'cmdline', 'recent', 'state'
+        ), set(tim), get_matches):
             found = True
             yield tim[tid]
 

kitty/rc/base.py

@@ -76,18 +76,21 @@ ArgsType = List[str]
 MATCH_WINDOW_OPTION = '''\
 --match -m
 The window to match. Match specifications are of the form:
-:italic:`field:regexp`. Where field can be one of: id, title, pid, cwd, cmdline, num, env and recent.
+:italic:`field:regexp`. Where field can be one of: id, title, pid, cwd, cmdline, num, env, state and recent.
 You can use the :italic:`ls` command to get a list of windows. Expressions can
 be :ref:`combined using Boolean operators <search_syntax>`. Note that for
-numeric fields such as id, pid, recent and num the expression is interpreted as a number,
-not a regular expression. The field num refers to the window position in the current tab,
+numeric fields such as :code:`id`, :code:`pid`, :code:`recent` and :code:`num` the expression is interpreted as a number,
+not a regular expression. The field :code:`num` refers to the window position in the current tab,
 starting from zero and counting clockwise (this is the same as the order in which the
 windows are reported by the :italic:`ls` command). The window id of the current window
-is available as the KITTY_WINDOW_ID environment variable. The field recent refers to recently
+is available as the KITTY_WINDOW_ID environment variable. The field :code:`recent` refers to recently
 active windows in the currently active tab, with zero being the currently active window, one being the previously active
 window and so on. When using the :italic:`env` field
 to match on environment variables you can specify only the environment variable name or a name
-and value, for example, :italic:`env:MY_ENV_VAR=2`
+and value, for example, :italic:`env:MY_ENV_VAR=2`. The field :code:`state` matches
+on the state of the window. Supported states are: :code:`active`, :code:`focused` and :code:`needs_attention`.
+Active windows are windows that are the active window in their parent tab. There is only one focused window
+and it is the window to which keyboard events are delivered.
 '''
 MATCH_TAB_OPTION = '''\
 --match -m
@@ -103,7 +106,10 @@ for that window is used. You can also use window_id and window_title to match
 the tab that contains the window with the specified id or title. The index number
 is used to match the nth tab in the currently active OS window. The recent number
 matches recently active tabs in the currently active OS window, with zero being the currently
-active tab, one the previously active tab and so on.
+active tab, one the previously active tab and so on. The field :code:`state` matches
+on the state of the tab. Supported states are: :code:`active`, :code:`focused` and :code:`needs_attention`.
+Active tabs are tabs that are the active tab in their parent OS Window. There is only one focused tab
+and it is the tab to which keyboard events are delivered.
 '''
 
 

kitty/tabs.py

@@ -20,10 +20,10 @@ from .cli_stub import CLIOptions
 from .constants import appname, kitty_exe
 from .fast_data_types import (
     GLFW_MOUSE_BUTTON_LEFT, GLFW_MOUSE_BUTTON_MIDDLE, GLFW_PRESS, GLFW_RELEASE,
-    add_tab, attach_window, detach_window, get_boss, get_click_interval,
-    get_options, mark_tab_bar_dirty, next_window_id, remove_tab, remove_window,
-    ring_bell, set_active_tab, set_active_window, swap_tabs,
-    sync_os_window_title
+    add_tab, attach_window, current_os_window, detach_window, get_boss,
+    get_click_interval, get_options, mark_tab_bar_dirty, next_window_id,
+    remove_tab, remove_window, ring_bell, set_active_tab, set_active_window,
+    swap_tabs, sync_os_window_title
 )
 from .layout.base import Layout
 from .layout.interface import create_layout_object_for, evict_cached_layouts
@@ -708,6 +708,16 @@ class Tab:  # {{{
             if active_tab_manager and len(active_tab_manager.tabs):
                 return self is active_tab_manager.nth_active_tab(int(query))
             return False
+        if field == 'state':
+            if query == 'active':
+                return active_tab_manager is not None and self is active_tab_manager.active_tab
+            if query == 'focused':
+                return active_tab_manager is not None and self is active_tab_manager.active_tab and self.os_window_id == current_os_window()
+            if query == 'needs_attention':
+                for w in self:
+                    if w.needs_attention:
+                        return True
+            return False
         return False
 
     def __iter__(self) -> Iterator[Window]:

kitty/window.py

@@ -661,6 +661,14 @@ class Window:
                         return active_tab.get_nth_window(q) is self
                     return active_tab.nth_active_window_id(q) == self.id
             return False
+        if field == 'state':
+            if query == 'active':
+                return active_tab is not None and self is active_tab.active_window
+            if query == 'focused':
+                return active_tab is not None and self is active_tab.active_window and current_os_window() == self.os_window_id
+            if query == 'needs_attention':
+                return self.needs_attention
+            return False
         pat = compile_match_query(query, field != 'env')
         return self.matches(field, pat)