partial 2

builtin/common/settings/components.lua

@@ -486,10 +486,12 @@ function make.key(setting)
 			return table.concat(fs), height
 		end,
 
-		on_submit = function(self, fields)
+		on_submit = function(self, fields, tabview)
 			if fields[btn_bind] then
 				core.settings:set(setting.name, fields[btn_bind])
 				return true
+			elseif fields[btn_edit] then
+				return show_change_keybinding_dlg(setting, tabview)
 			elseif fields[btn_clear] then
 				core.settings:set(setting.name, "")
 				return true

builtin/common/settings/dlg_change_keybinding.lua

@@ -0,0 +1,78 @@
+-- Luanti
+-- SPDX-License-Identifier: LGPL-2.1-or-later
+local function get_formspec(dialogdata)
+	local name = dialogdata.setting.name
+	local readable_name = name
+	if dialogdata.setting.readable_name then
+		readable_name = ("%s (%s)"):format(fgettext(dialogdata.setting.readable_name), name)
+	end
+
+	local fs = {
+		"formspec_version[4]",
+		"size[6,2]", -- size element; height can only be determined later
+		("label[0.5,0.8;%s]"):format(readable_name),
+	}
+
+	return table.concat(fs)
+end
+
+local function buttonhandler(self, fields)
+	local name = self.data.setting.name
+	if fields.quit or fields.btn_close then
+		self:delete()
+		return true
+	end
+	return false
+end
+
+local formspec_handlers = {}
+if INIT == "pause_menu" then
+	core.register_on_formspec_input(function(formname, fields)
+		if formspec_handlers[formname] then
+			formspec_handlers[formname](fields)
+			return true
+		end
+	end)
+end
+
+local is_mainmenu = INIT == "mainmenu"
+function show_change_keybinding_dlg(setting, tabview)
+	local dlg
+	if is_mainmenu then
+		dlg = dialog_create("dlg_change_keybinding",
+				get_formspec, buttonhandler)
+	else
+		local name = "__builtin:rebind_" .. setting.name
+		dlg = {
+			show = function()
+				if dlg.removed then
+					--core.open_settings("controls_keyboard_and_mouse")
+					tabview:show()
+				else
+					core.show_formspec(name, get_formspec(dlg.data))
+				end
+			end,
+			delete = function()
+				core.show_formspec(name, "")
+				formspec_handlers[name] = nil
+				dlg.removed = true
+			end,
+			data = {},
+		}
+		formspec_handlers[name] = function(fields)
+			if buttonhandler(dlg, fields) then
+				dlg:show()
+			end
+		end
+	end
+
+	dlg.data.setting = setting
+
+	if is_mainmenu then
+		dlg:set_parent(tabview)
+		tabview:hide()
+	end
+	dlg:show()
+
+	return is_mainmenu
+end

builtin/common/settings/dlg_settings.lua

@@ -814,7 +814,9 @@ else
 			-- case it's a no-op
 			core.show_formspec("__builtin:settings", "")
 		end
-
-		core.show_formspec("__builtin:settings", get_formspec(dialog.data))
+		dialog.show = function() -- Used by the keybinding form
+			core.show_formspec("__builtin:settings", get_formspec(dialog.data))
+		end
+		dialog:show()
 	end
 end

builtin/common/settings/init.lua

@@ -6,6 +6,7 @@ local path = core.get_builtin_path() .. "common" .. DIR_DELIM .. "settings" .. D
 
 dofile(path .. "settingtypes.lua")
 dofile(path .. "dlg_change_mapgen_flags.lua")
+dofile(path .. "dlg_change_keybinding.lua")
 dofile(path .. "dlg_settings.lua")
 
 -- Uncomment to generate 'minetest.conf.example' and 'settings_translation_file.cpp'.