A new remote control command to resize OS Windows

docs/changelog.rst

@@ -26,6 +26,9 @@ To update |kitty|, :doc:`follow the instructions <binary>`.
   could cause incorrect parsing if either the pending buffer capacity or the
   pending timeout were exceeded (:iss:`3779`)
 
+- A new remote control command to :program:`resize the OS Window <kitty @
+  resize-os-window>`
+
 - Graphics protocol: Add support for composing rectangles from one animation
   frame onto another (:iss:`3809`)
 

kitty/boss.py

@@ -32,11 +32,12 @@
     background_opacity_of, change_background_opacity, change_os_window_state,
     cocoa_set_menubar_title, create_os_window,
     current_application_quit_request, current_os_window, destroy_global_data,
-    focus_os_window, get_clipboard_string, get_options, global_font_size,
-    mark_os_window_for_close, os_window_font_size, patch_global_colors,
-    safe_pipe, set_application_quit_request, set_background_image, set_boss,
-    set_clipboard_string, set_in_sequence_mode, set_options, thread_write,
-    toggle_fullscreen, toggle_maximized
+    focus_os_window, get_clipboard_string, get_options, get_os_window_size,
+    global_font_size, mark_os_window_for_close, os_window_font_size,
+    patch_global_colors, safe_pipe, set_application_quit_request,
+    set_background_image, set_boss, set_clipboard_string, set_in_sequence_mode,
+    set_options, set_os_window_size, thread_write, toggle_fullscreen,
+    toggle_maximized
 )
 from .keys import get_shortcut, shortcut_matches
 from .layout.base import set_layout_options
@@ -52,10 +53,11 @@
 from .types import SingleKey
 from .typing import PopenType, TypedDict
 from .utils import (
-    func_name, get_editor, get_primary_selection, is_path_in_temp_dir,
-    log_error, open_url, parse_address_spec, parse_uri_list,
-    platform_window_id, read_shell_environment, remove_socket_file, safe_print,
-    set_primary_selection, single_instance, startup_notification_handler
+    func_name, get_editor, get_new_os_window_size, get_primary_selection,
+    is_path_in_temp_dir, log_error, open_url, parse_address_spec,
+    parse_uri_list, platform_window_id, read_shell_environment,
+    remove_socket_file, safe_print, set_primary_selection, single_instance,
+    startup_notification_handler
 )
 from .window import MatchPatternType, Window
 
@@ -533,11 +535,11 @@ def close_tab_no_confirm(self, tab: Tab) -> None:
             self.close_window(window)
 
     def toggle_fullscreen(self, os_window_id: int = 0) -> None:
-        '@ac:win: Toggle the fullscreen status of the specified or the active OS Window'
+        '@ac:win: Toggle the fullscreen status of the active OS Window'
         toggle_fullscreen(os_window_id)
 
     def toggle_maximized(self, os_window_id: int = 0) -> None:
-        '@ac:win: Toggle the maximized status of the specified or the active OS Window'
+        '@ac:win: Toggle the maximized status of the active OS Window'
         toggle_maximized(os_window_id)
 
     def start(self, first_os_window_id: int) -> None:
@@ -784,6 +786,16 @@ def resize_layout_window(self, window: Window, increment: float, is_horizontal:
             return None
         return tab.resize_window_by(window.id, increment, is_horizontal)
 
+    def resize_os_window(self, os_window_id: int, width: int, height: int, unit: str, incremental: bool = False) -> None:
+        if not incremental and (width < 0 or height < 0):
+            return
+        metrics = get_os_window_size(os_window_id)
+        if metrics is None:
+            return
+        has_window_scaling = is_macos or is_wayland()
+        w, h = get_new_os_window_size(metrics, width, height, unit, incremental, has_window_scaling)
+        set_os_window_size(os_window_id, w, h)
+
     def default_bg_changed_for(self, window_id: int) -> None:
         w = self.window_id_map.get(window_id)
         if w is not None:

kitty/fast_data_types.pyi

@@ -1202,6 +1202,8 @@ class OSWindowSize(TypedDict):
     yscale: float
     xdpi: float
     ydpi: float
+    cell_width: int
+    cell_height: int
 
 
 def get_os_window_size(os_window_id: int) -> Optional[OSWindowSize]:

kitty/rc/resize_os_window.py

@@ -0,0 +1,102 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+from typing import TYPE_CHECKING, Optional
+
+from .base import (
+    MATCH_WINDOW_OPTION, ArgsType, Boss, PayloadGetType,
+    PayloadType, RCOptions, RemoteCommand, ResponseType, Window
+)
+
+if TYPE_CHECKING:
+    from kitty.cli_stub import ResizeOSWindowRCOptions as CLIOptions
+
+
+class ResizeOSWindow(RemoteCommand):
+    '''
+    match: Which window to resize
+    self: Boolean indicating whether to close the window the command is run in
+    incremental: Boolean indicating whether to adjust the size incrementally
+    action: One of :code:`resize, toggle-fullscreen` or :code:`toggle-maximized`
+    unit: One of :code:`cells` or :code:`pixels`
+    width: Integer indicating desired window width
+    height: Integer indicating desired window height
+    '''
+
+    short_desc = 'Resize the specified OS Window'
+    desc = (
+        'Resize the specified OS Window.'
+        ' Note that some window managers/environments do not allow applications to resize'
+        ' their windows, for example, tiling window managers.'
+    )
+    options_spec = MATCH_WINDOW_OPTION + '''\n
+--action
+default=resize
+choices=resize,toggle-fullscreen,toggle-maximized
+The action to perform.
+
+
+--unit
+default=cells
+choices=cells,pixels
+The unit in which to interpret specified sizes
+
+
+--width
+default=0
+type=int
+Change the width of the window. Zero leaves the width unchanged.
+
+
+--height
+default=0
+type=int
+Change the height of the window. Zero leaves the height unchanged.
+
+
+--incremental
+type=bool-set
+Treat the specified sizes as increments on the existing window size
+instead of absolute sizes.
+
+
+--self
+type=bool-set
+If specified resize the window this command is run in, rather than the active window.
+
+
+--no-response
+type=bool-set
+default=false
+Don't wait for a response indicating the success of the action. Note that
+using this option means that you will not be notified of failures.
+'''
+    argspec = ''
+
+    def message_to_kitty(self, global_opts: RCOptions, opts: 'CLIOptions', args: ArgsType) -> PayloadType:
+        if opts.no_response:
+            global_opts.no_command_response = True
+        return {
+            'match': opts.match, 'action': opts.action, 'unit': opts.unit,
+            'width': opts.width, 'height': opts.height, 'self': opts.self,
+            'incremental': opts.incremental
+        }
+
+    def response_from_kitty(self, boss: Boss, window: Optional[Window], payload_get: PayloadGetType) -> ResponseType:
+        windows = self.windows_for_match_payload(boss, window, payload_get)
+        if windows:
+            ac = payload_get('action')
+            for os_window_id in {w.os_window_id for w in windows}:
+                if ac == 'resize':
+                    boss.resize_os_window(
+                        os_window_id, width=payload_get('width'), height=payload_get('height'),
+                        unit=payload_get('unit'), incremental=payload_get('incremental')
+                    )
+                elif ac == 'toggle-fullscreen':
+                    boss.toggle_fullscreen(os_window_id)
+                elif ac == 'toggle-maximized':
+                    boss.toggle_maximized(os_window_id)
+
+
+resize_os_window = ResizeOSWindow()

kitty/state.c

@@ -891,9 +891,11 @@ PYWRAP1(get_os_window_size) {
         int width, height, fw, fh;
         get_os_window_size(os_window, &width, &height, &fw, &fh);
         get_os_window_content_scale(os_window, &xdpi, &ydpi, &xscale, &yscale);
-        return Py_BuildValue("{si si si si sf sf sd sd}",
+        unsigned int cell_width = os_window->fonts_data->cell_width, cell_height = os_window->fonts_data->cell_height;
+        return Py_BuildValue("{si si si si sf sf sd sd sI sI}",
             "width", width, "height", height, "framebuffer_width", fw, "framebuffer_height", fh,
-            "xscale", xscale, "yscale", yscale, "xdpi", xdpi, "ydpi", ydpi);
+            "xscale", xscale, "yscale", yscale, "xdpi", xdpi, "ydpi", ydpi,
+            "cell_width", cell_width, "cell_height", cell_height);
     END_WITH_OS_WINDOW
     Py_RETURN_NONE;
 }

kitty/utils.py

@@ -28,6 +28,7 @@
 
 if TYPE_CHECKING:
     from .options.types import Options
+    from .fast_data_types import OSWindowSize
 else:
     Options = object
 
@@ -692,3 +693,23 @@ class SSHConnectionData(NamedTuple):
     binary: str
     hostname: str
     port: Optional[int] = None
+
+
+def get_new_os_window_size(
+    metrics: 'OSWindowSize', width: int, height: int, unit: str, incremental: bool = False, has_window_scaling: bool = True
+) -> Tuple[int, int]:
+    if unit == 'cells':
+        cw = metrics['cell_width']
+        ch = metrics['cell_height']
+        if has_window_scaling:
+            cw = int(cw / metrics['xscale'])
+            ch = int(ch / metrics['yscale'])
+        width *= cw
+        height *= ch
+    if incremental:
+        w = metrics['width'] + width
+        h = metrics['height'] + height
+    else:
+        w = width or metrics['width']
+        h = height or metrics['height']
+    return w, h

kitty_tests/glfw.py

@@ -12,6 +12,34 @@
 
 class TestGLFW(BaseTest):
 
+    def test_os_window_size_calculation(self):
+        from kitty.utils import get_new_os_window_size
+
+        def t(w, h, width=0, height=0, unit='cells', incremental=False):
+            self.ae((w, h), get_new_os_window_size(metrics, width, height, unit, incremental, has_window_scaling))
+
+        with self.subTest(has_window_scaling=False):
+            has_window_scaling = False
+            metrics = {
+                'width': 200, 'height': 100,
+                'framebuffer_width': 200, 'framebuffer_height': 100,
+                'xscale': 2.0, 'yscale': 2.0, 'xdpi': 192.0, 'ydpi': 192.0,
+                'cell_width': 8, 'cell_height': 16
+            }
+            t(80 * metrics['cell_width'], 100, 80)
+            t(80 * metrics['cell_width'] + metrics['width'], 100, 80, incremental=True)
+            t(1217, 100, 1217, unit='pixels')
+            t(1217 + metrics['width'], 100, 1217, unit='pixels', incremental=True)
+
+        with self.subTest(has_window_scaling=True):
+            has_window_scaling = True
+            metrics['framebuffer_width'] = metrics['width'] * 2
+            metrics['framebuffer_height'] = metrics['height'] * 2
+            t(80 * metrics['cell_width'] / metrics['xscale'], 100, 80)
+            t(80 * metrics['cell_width'] / metrics['xscale'] + metrics['width'], 100, 80, incremental=True)
+            t(1217, 100, 1217, unit='pixels')
+            t(1217 + metrics['width'], 100, 1217, unit='pixels', incremental=True)
+
     @unittest.skipIf(is_macos, 'Skipping test on macOS because glfw-cocoa.so is not built with backend_utils')
     def test_utf_8_strndup(self):
         import ctypes