Allow the user to control the resize debounce time via resize_debounce_time

Author: kovidgoyal

docs/changelog.rst

@@ -8,7 +8,7 @@ To update |kitty|, :doc:`follow the instructions <binary>`.
 ---------------------
 
 - macOS: The default behavior of the Option key has changed. It now generates
-  unicode characters rather than acting as the Alt modifier. See
+  unicode characters rather than acting as the :kbd:`Alt` modifier. See
   :opt:`macos_option_as_alt`.
 
 - Support for an arbitrary number of internal clipboard buffers to copy/paste
@@ -117,6 +117,9 @@ To update |kitty|, :doc:`follow the instructions <binary>`.
 - When encountering errors in :file:`kitty.conf` report them to the user
   instead of failing to start.
 
+- Allow the user to control the resize debounce time via
+  :opt:`resize_debounce_time`.
+
 
 0.13.3 [2019-01-19]
 ------------------------------

kitty/child-monitor.c

@@ -831,10 +831,10 @@ process_pending_resizes(double now) {
             if (w->live_resize.from_os_notification) {
                 if (w->live_resize.os_says_resize_complete || (now - w->live_resize.last_resize_event_at) > 1) update_viewport = true;
             } else {
-                if (now - w->live_resize.last_resize_event_at >= RESIZE_DEBOUNCE_TIME) update_viewport = true;
+                if (now - w->live_resize.last_resize_event_at >= OPT(resize_debounce_time)) update_viewport = true;
                 else {
                     global_state.has_pending_resizes = true;
-                    set_maximum_wait(RESIZE_DEBOUNCE_TIME - now + w->live_resize.last_resize_event_at);
+                    set_maximum_wait(OPT(resize_debounce_time) - now + w->live_resize.last_resize_event_at);
                 }
             }
             if (update_viewport) {

kitty/config_data.py

@@ -603,6 +603,12 @@ def to_layout_names(raw):
 Whether this works and exactly what effect it has depends on the
 window manager/operating system.
 '''))
+
+o('resize_debounce_time', 0.1, option_type=positive_float, long_text=_('''
+The time (in seconds) to wait before redrawing the screen when a
+resize event is received. On platforms such as macOS, where the
+operating system sends event corresponding to the start and end
+of a resize, this number is ignored.'''))
 # }}}
 
 g('tabbar')   # {{{

kitty/state.c

@@ -387,6 +387,7 @@ PYWRAP1(set_options) {
     S(open_url_modifiers, convert_mods);
     S(rectangle_select_modifiers, convert_mods);
     S(click_interval, PyFloat_AsDouble);
+    S(resize_debounce_time, PyFloat_AsDouble);
     S(url_color, color_as_int);
     S(background, color_as_int);
     S(foreground, color_as_int);

kitty/state.h

@@ -40,6 +40,7 @@ typedef struct {
     bool close_on_child_death;
     bool window_alert_on_bell;
     bool debug_keyboard;
+    double resize_debounce_time;
 } Options;
 
 typedef struct {
@@ -178,8 +179,6 @@ extern GlobalState global_state;
     else Py_DECREF(cret_); \
 }
 
-#define RESIZE_DEBOUNCE_TIME 0.2
-
 void gl_init();
 void remove_vao(ssize_t vao_idx);
 bool remove_os_window(id_type os_window_id);