Files initial release.

control.lua

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+local MINIMUM_SPEED = 0.125
+local MAXIMUM_SPEED = 64
+
+local function timewarp(event, mult)
+    local player = game.players[event.player_index]
+    if not (player and player.permission_group and player.permission_group.allows_action(defines.server_command)) then
+        return
+    end
+
+    local msg = "timecontrol.speed-changed"
+
+    local oldspeed = game.speed
+    local newspeed
+
+    if mult == 0 then
+        newspeed = 1
+        msg = "timecontrol.speed-reset"
+    else
+        newspeed = game.speed * mult
+        if newspeed < MINIMUM_SPEED then
+            newspeed = MINIMUM_SPEED
+        elseif newspeed > MAXIMUM_SPEED then
+            newspeed = MAXIMUM_SPEED
+        end
+    end
+
+    -- If the effective speed wouldn't change, end now to avoid console spam.
+    if newspeed == oldspeed then
+        return
+    end
+
+    if #game.players > 1 then
+        msg = msg .. "-by"
+    end
+
+    game.print{msg, newspeed, player.name }
+    game.speed = newspeed
+end
+
+script.on_event("timecontrol_normal", function(event) return timewarp(event, 0) end)
+script.on_event("timecontrol_slower", function(event) return timewarp(event, 0.5) end)
+script.on_event("timecontrol_faster", function(event) return timewarp(event, 2.0) end)
+
+

data.lua

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+-- Add keybindings
+
+data:extend({
+    {
+        type = "custom-input",
+        name = "timecontrol_normal",
+        key_sequence = "BACKSPACE",
+        order = 'a-z',
+    },
+    {
+        type = "custom-input",
+        name = "timecontrol_faster",
+        key_sequence = "KEY62",
+        order = 'a-a',
+        -- consuming = "all",
+    },
+    {
+        type = "custom-input",
+        name = "timecontrol_slower",
+        key_sequence = "KEY61",
+        order = 'a-b',
+        -- consuming = "all"
+    },
+})

info.json

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+{
+    "name": "TimeControl",
+    "version": "0.1.0",
+    "title": "Time Control",
+    "author": "Dewin",
+    "contact": "https://github.com/dewiniaid/TimeControl",
+    "homepage": "https://github.com/dewiniaid/TimeControl",
+    "factorio_version": "0.15",
+    "dependencies": ["base >= 0.15"],
+    "description": "Adds bindings for adjusting game speed."
+}

locale/en/locale.cfg

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+[timecontrol]
+speed-changed=Game speed changed to __1__x.
+speed-changed-by=__2__ changed game speed to __1__x.
+speed-reset=Game speed reset to normal .
+speed-reset-by=Game speed reset to normal by __2__.
+
+[controls]
+timecontrol_normal=Normal speed
+timecontrol_faster=Faster
+timecontrol_slower=Slower