Initial flame_lua_runtime package

example/assets/games/ludo/scripts/animation.lua

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+---@type RuntimeCommands
+local commands = runtime.import("runtime_commands")
+
+local animation = {}
+
+function animation.move_piece(piece_id, path)
+  return commands.move_path(piece_id, path, {
+    duration = 0.7,
+    onComplete = "piece_move_done"
+  })
+end
+
+function animation.toast(text)
+  return commands.toast(text)
+end
+
+function animation.play_sound(name)
+  return commands.play_sound(name)
+end
+
+function animation.play_bgm(name, channel)
+  return commands.play_bgm(name, { channel = channel or "bgm" })
+end
+
+function animation.pause_bgm(channel)
+  return commands.pause_bgm(channel)
+end
+
+function animation.resume_bgm(channel)
+  return commands.resume_bgm(channel)
+end
+
+function animation.stop_bgm(channel)
+  return commands.stop_bgm(channel)
+end
+
+return animation

example/assets/games/ludo/scripts/board.lua

@@ -0,0 +1,20 @@
+---@type BoardData
+return {
+  red_home = {
+    {x = 80, y = 520},
+    {x = 140, y = 520}
+  },
+  blue_home = {
+    {x = 520, y = 120},
+    {x = 580, y = 120}
+  },
+  path = {
+    {x = 120, y = 420}, {x = 180, y = 420}, {x = 240, y = 420},
+    {x = 300, y = 420}, {x = 360, y = 420}, {x = 420, y = 420},
+    {x = 480, y = 420}, {x = 480, y = 360}, {x = 480, y = 300},
+    {x = 480, y = 240}, {x = 420, y = 240}, {x = 360, y = 240},
+    {x = 300, y = 240}, {x = 240, y = 240}, {x = 180, y = 240},
+    {x = 120, y = 240}, {x = 120, y = 300}, {x = 120, y = 360}
+  },
+  start = { red = 1, blue = 10 }
+}

example/assets/games/ludo/scripts/i18n.lua

@@ -0,0 +1,103 @@
+---@class RuntimeI18n
+local i18n = {}
+
+local default_locale = "zh-Hans"
+local current_locale = default_locale
+
+local messages = {
+  ["zh-Hans"] = {
+    title = "Lua 飞行棋",
+    roll_button = "掷骰子",
+    dice_empty = "骰子: -",
+    dice_value = "骰子: {value}",
+    current_player = "当前玩家: {player}",
+    ["player.red"] = "红方",
+    ["player.blue"] = "蓝方",
+    ["toast.move_first"] = "请先移动棋子",
+    ["toast.no_movable_piece"] = "无可移动棋子",
+    ["toast.invalid_piece"] = "该棋子不能移动"
+  },
+  en = {
+    title = "Lua Ludo",
+    roll_button = "Roll",
+    dice_empty = "Dice: -",
+    dice_value = "Dice: {value}",
+    current_player = "Current player: {player}",
+    ["player.red"] = "Red",
+    ["player.blue"] = "Blue",
+    ["toast.move_first"] = "Move a piece first",
+    ["toast.no_movable_piece"] = "No movable pieces",
+    ["toast.invalid_piece"] = "This piece cannot move"
+  }
+}
+
+---@param locale? string
+---@return string
+local function normalize_locale(locale)
+  if type(locale) ~= "string" or locale == "" then
+    return default_locale
+  end
+  locale = string.gsub(locale, "_", "-")
+  if messages[locale] ~= nil then
+    return locale
+  end
+
+  local language = string.match(locale, "^([A-Za-z]+)")
+  if language ~= nil and messages[language] ~= nil then
+    return language
+  end
+  return default_locale
+end
+
+---@param value string
+---@return string
+local function escape_pattern(value)
+  return string.gsub(value, "([%(%)%.%%%+%-%*%?%[%]%^%$])", "%%%1")
+end
+
+---@param template string
+---@param vars? table<string, string|number>
+---@return string
+local function interpolate(template, vars)
+  if vars == nil then
+    return template
+  end
+
+  local result = template
+  for key, value in pairs(vars) do
+    result = string.gsub(result, "{" .. escape_pattern(key) .. "}", tostring(value))
+  end
+  return result
+end
+
+---@param ctx? RuntimeContext
+function i18n.configure(ctx)
+  local locale = nil
+  if ctx ~= nil and ctx.locale ~= nil then
+    locale = ctx.locale.resolved or ctx.locale.requested or ctx.locale.default
+  end
+  current_locale = normalize_locale(locale)
+end
+
+---@return string
+function i18n.locale()
+  return current_locale
+end
+
+---@param key string
+---@param vars? table<string, string|number>
+---@return string
+function i18n.t(key, vars)
+  local bundle = messages[current_locale] or messages[default_locale]
+  local fallback = messages[default_locale]
+  local value = bundle[key] or fallback[key] or key
+  return interpolate(value, vars)
+end
+
+---@param color PlayerColor
+---@return string
+function i18n.player(color)
+  return i18n.t("player." .. color)
+end
+
+return i18n

example/assets/games/ludo/scripts/main.lua

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+local state = runtime.import("state")
+local rules = runtime.import("rules")
+local ui = runtime.import("ui")
+local animation = runtime.import("animation")
+local i18n = runtime.import("i18n")
+---@type RuntimeWidgets
+local widgets = runtime.import("runtime_widgets")
+local theme = runtime.import("theme")
+
+widgets.configure({
+  primary = theme.colors.dice_button,
+  secondary = theme.colors.board,
+  success = theme.colors.blue,
+  overlay = "#99000000",
+  surface = theme.colors.top_bar,
+  surfaceAlt = theme.colors.board,
+  card = theme.colors.top_bar,
+  text = theme.colors.text,
+  muted = "#ffcbd5e1",
+  progress = theme.colors.blue,
+  transparent = "#00000000"
+})
+
+function smoke_test(ctx)
+  i18n.configure(ctx)
+  return ctx ~= nil
+    and ctx.runtimeApiVersion ~= nil
+    and state.current_player ~= nil
+    and rules.next_player ~= nil
+    and ui.create_board_nodes ~= nil
+    and animation.move_piece ~= nil
+    and widgets.dialog ~= nil
+end
+
+function init(ctx)
+  i18n.configure(ctx)
+  return {
+    render = { creates = ui.create_board_nodes() },
+    ui = { creates = ui.create_ui_nodes() },
+    commands = {}
+  }
+end
+
+local function handle_roll_dice()
+  if state.phase ~= "waiting_roll" then
+    return { commands = { animation.toast(i18n.t("toast.move_first")) } }
+  end
+
+  state.dice = rules.next_dice()
+  local movable = rules.movable_pieces()
+
+  if #movable == 0 then
+    state.current_player = rules.next_player()
+    state.phase = "waiting_roll"
+    return {
+      ui = { updates = ui.dice_and_turn_updates(state.dice, state.current_player) },
+      render = { updates = ui.highlight_updates(rules.all_piece_ids(), false) },
+      commands = { animation.toast(i18n.t("toast.no_movable_piece")) }
+    }
+  end
+
+  state.phase = "waiting_piece"
+  return {
+    ui = { updates = ui.dice_update(state.dice) },
+    render = { updates = ui.highlight_updates(movable, true) },
+    commands = { animation.play_sound("dice") }
+  }
+end
+
+local function handle_piece_tap(piece_id)
+  if state.phase ~= "waiting_piece" then
+    return {}
+  end
+
+  local piece = state.pieces[piece_id]
+  if piece == nil or piece.owner ~= state.current_player or not rules.can_move(piece, state.dice) then
+    return { commands = { animation.toast(i18n.t("toast.invalid_piece")) } }
+  end
+
+  local path = rules.calculate_path(piece, state.dice)
+  rules.apply_move(piece, state.dice)
+  state.phase = "animating"
+  state.selected_piece = piece_id
+
+  return {
+    render = { updates = ui.highlight_updates(rules.all_piece_ids(), false) },
+    commands = { animation.move_piece(piece_id, path) }
+  }
+end
+
+local function handle_move_done()
+  if state.dice ~= 6 then
+    state.current_player = rules.next_player()
+  end
+  state.phase = "waiting_roll"
+  state.selected_piece = nil
+
+  return {
+    ui = { updates = ui.turn_update(state.current_player) }
+  }
+end
+
+function on_event(event)
+  if event.handler == "roll_dice" then
+    return handle_roll_dice()
+  end
+
+  if event.handler == "piece_tap" then
+    return handle_piece_tap(event.target)
+  end
+
+  if event.handler == "piece_move_done" then
+    return handle_move_done()
+  end
+
+  return {}
+end

example/assets/games/ludo/scripts/rules.lua

@@ -0,0 +1,88 @@
+local state = runtime.import("state")
+local board = runtime.import("board")
+
+local rules = {}
+
+function rules.next_player()
+  if state.current_player == "red" then
+    return "blue"
+  end
+  return "red"
+end
+
+function rules.next_dice()
+  state.dice_index = state.dice_index + 1
+  if state.dice_index > #state.dice_values then
+    state.dice_index = 1
+  end
+  return state.dice_values[state.dice_index]
+end
+
+function rules.piece_home_position(piece)
+  if piece.owner == "red" then
+    if piece.id == "red_1" then return board.red_home[1] end
+    return board.red_home[2]
+  end
+  if piece.id == "blue_1" then return board.blue_home[1] end
+  return board.blue_home[2]
+end
+
+function rules.can_move(piece, dice)
+  if piece.status == "home" then
+    return dice == 6
+  end
+  return true
+end
+
+function rules.movable_pieces()
+  local result = {}
+  for id, piece in pairs(state.pieces) do
+    if piece.owner == state.current_player and rules.can_move(piece, state.dice) then
+      table.insert(result, id)
+    end
+  end
+  return result
+end
+
+function rules.all_piece_ids()
+  local result = {}
+  for id, _ in pairs(state.pieces) do
+    table.insert(result, id)
+  end
+  return result
+end
+
+function rules.calculate_path(piece, dice)
+  local path = {}
+  if piece.status == "home" then
+    local start_index = board.start[piece.owner]
+    local pos = board.path[start_index]
+    table.insert(path, {x = pos.x, y = pos.y})
+    return path
+  end
+
+  for i = 1, dice do
+    local index = piece.path_index + i
+    while index > #board.path do
+      index = index - #board.path
+    end
+    local pos = board.path[index]
+    table.insert(path, {x = pos.x, y = pos.y})
+  end
+  return path
+end
+
+function rules.apply_move(piece, dice)
+  if piece.status == "home" then
+    piece.status = "path"
+    piece.path_index = board.start[piece.owner]
+    return
+  end
+
+  piece.path_index = piece.path_index + dice
+  while piece.path_index > #board.path do
+    piece.path_index = piece.path_index - #board.path
+  end
+end
+
+return rules

example/assets/games/ludo/scripts/runtime_defs.lua

@@ -0,0 +1,587 @@
+---@meta
+--- COMMON RUNTIME TYPES SECTION.
+--- Source of truth: tool/lua_runtime_defs_common.lua
+--- After editing this common section, run:
+---   dart run tool/generate_lua_runtime_defs.dart
+
+
+---@alias RuntimeNodeType
+---| 'panel'
+---| 'button'
+---| 'text'
+---| 'circle'
+---| 'rect'
+---| 'line'
+---| 'progress'
+---| 'listView'
+---| 'sprite'
+---| 'image'
+---| 'spine'
+---| 'particle'
+
+---@alias RuntimeAnchor
+---| 'center'
+---| 'topLeft'
+---| 'topRight'
+---| 'bottomLeft'
+---| 'bottomRight'
+
+---@alias RuntimeTextAlign
+---| 'left'
+---| 'center'
+---| 'right'
+
+---@alias RuntimeParticlePreset
+---| 'burst'
+---| 'trail'
+---| 'snow'
+---| 'confetti'
+
+---@alias RuntimeCommandType
+---| 'move_path'
+---| 'move_to'
+---| 'fade_to'
+---| 'scale_to'
+---| 'rotate_to'
+---| 'remove_node'
+---| 'sequence'
+---| 'parallel'
+---| 'delay'
+---| 'toast'
+---| 'play_sound'
+---| 'play_bgm'
+---| 'pause_bgm'
+---| 'resume_bgm'
+---| 'stop_bgm'
+---| 'preload_resources'
+---| 'evict_resources'
+---| 'cancel_commands'
+---| 'play_spine_animation'
+---| 'copy_text'
+
+---@alias RuntimeEventType
+---| 'tap'
+---| 'animation_done'
+---| 'resize'
+---| 'scroll'
+
+---@alias RuntimeScaleMode
+---| 'fit'
+---| 'fill'
+---| 'stretch'
+---| 'none'
+
+---@alias RuntimeLayoutAlign
+---| 'start'
+---| 'center'
+---| 'end'
+
+---@alias RuntimeButtonVariant
+---| 'primary'
+---| 'secondary'
+---| 'ghost'
+
+---@class (exact) RuntimeNode
+---@field id string
+---@field type RuntimeNodeType
+---@field parent? string
+---@field asset? string Normal image/sprite/spine asset key. For button nodes this is the normal-state image.
+---@field pressedAsset? string Button pressed-state image asset key.
+---@field disabledAsset? string Button disabled-state image asset key.
+---@field animation? string
+---@field skin? string
+---@field loop? boolean
+---@field text? string
+---@field x? number
+---@field y? number
+---@field width? number
+---@field height? number
+---@field paddingLeft? number
+---@field paddingTop? number
+---@field paddingRight? number
+---@field paddingBottom? number
+---@field anchor? RuntimeAnchor
+---@field layer? integer
+---@field visible? boolean
+---@field alpha? number
+---@field scale? number
+---@field rotation? number
+---@field color? string
+---@field fontSize? number
+---@field textAlign? RuntimeTextAlign
+---@field radius? number
+---@field strokeWidth? number
+---@field value? number
+---@field scrollX? number
+---@field scrollY? number
+---@field contentWidth? number
+---@field contentHeight? number
+---@field virtualized? boolean
+---@field cacheExtent? number
+---@field inertia? boolean
+---@field scrollbarThumbColor? string
+---@field scrollbarTrackColor? string
+---@field scrollbarThickness? number
+---@field scrollbarVisible? boolean
+---@field interactive? boolean
+---@field onTap? string
+---@field onScroll? string
+---@field preset? RuntimeParticlePreset
+---@field count? integer
+---@field duration? number
+---@field speedMin? number
+---@field speedMax? number
+---@field gravityX? number
+---@field gravityY? number
+---@field spread? number
+---@field colorTo? string
+---@field radiusTo? number
+---@field autoRemove? boolean
+---@field fadeOut? boolean
+
+---@class (exact) RuntimeNodeProps
+---@field type? RuntimeNodeType
+---@field parent? string
+---@field asset? string Normal image/sprite/spine asset key. For button nodes this is the normal-state image.
+---@field pressedAsset? string Button pressed-state image asset key.
+---@field disabledAsset? string Button disabled-state image asset key.
+---@field animation? string
+---@field skin? string
+---@field loop? boolean
+---@field text? string
+---@field x? number
+---@field y? number
+---@field width? number
+---@field height? number
+---@field paddingLeft? number
+---@field paddingTop? number
+---@field paddingRight? number
+---@field paddingBottom? number
+---@field anchor? RuntimeAnchor
+---@field layer? integer
+---@field visible? boolean
+---@field alpha? number
+---@field scale? number
+---@field rotation? number
+---@field color? string
+---@field fontSize? number
+---@field textAlign? RuntimeTextAlign
+---@field radius? number
+---@field strokeWidth? number
+---@field value? number
+---@field scrollX? number
+---@field scrollY? number
+---@field contentWidth? number
+---@field contentHeight? number
+---@field virtualized? boolean
+---@field cacheExtent? number
+---@field inertia? boolean
+---@field scrollbarThumbColor? string
+---@field scrollbarTrackColor? string
+---@field scrollbarThickness? number
+---@field scrollbarVisible? boolean
+---@field interactive? boolean
+---@field onTap? string
+---@field onScroll? string
+---@field preset? RuntimeParticlePreset
+---@field count? integer
+---@field duration? number
+---@field speedMin? number
+---@field speedMax? number
+---@field gravityX? number
+---@field gravityY? number
+---@field spread? number
+---@field colorTo? string
+---@field radiusTo? number
+---@field autoRemove? boolean
+---@field fadeOut? boolean
+
+---Helper-only fields accepted by runtime_ui/runtime_widgets. They are normalized
+---before the node/update crosses the Dart Runtime protocol boundary.
+---@class RuntimeNodeInit: RuntimeNodeProps
+---@field w? number Alias for width.
+---@field h? number Alias for height.
+---@field size? number Alias for both width and height.
+---@field handler? string Alias for onTap.
+---@field onClick? string Alias for onTap.
+
+---@class (exact) RuntimeNodeUpdate
+---@field id string
+---@field props RuntimeNodeProps
+
+---@class (exact) RuntimeNodeRemove
+---@field id string
+
+---@class (exact) RuntimeDiffSection
+---@field creates? RuntimeNode[]
+---@field updates? RuntimeNodeUpdate[]
+---@field removes? (string|RuntimeNodeRemove)[]
+
+---@class (exact) RuntimeDiff
+---@field render? RuntimeDiffSection
+---@field ui? RuntimeDiffSection
+---@field commands? RuntimeCommand[]
+
+---@class (exact) RuntimeEvent
+---@field type RuntimeEventType|string
+---@field target? string
+---@field handler? string
+---@field x? number
+---@field y? number
+---@field data? table
+
+---@class (exact) RuntimeCommand
+---@field type RuntimeCommandType
+---@field target? string
+---@field scope? string
+---@field id? string
+---@field group? string
+---@field commandGroup? string
+---@field onComplete? string
+---@field duration? number
+---@field commands? RuntimeCommand[]
+---@field path? RuntimePoint[]
+---@field x? number
+---@field y? number
+---@field alpha? number
+---@field scale? number
+---@field angle? number
+---@field text? string
+---@field message? string
+---@field asset? string
+---@field name? string
+---@field volume? number
+---@field channel? string
+---@field loop? boolean
+---@field failOnError? boolean
+---@field animation? string
+---@field track? integer
+---@field queue? boolean
+---@field delay? number
+
+---@class (exact) RuntimeCommandOpts
+---@field id? string
+---@field group? string
+---@field commandGroup? string
+---@field scope? string
+---@field onComplete? string
+---@field duration? number
+
+---@class (exact) RuntimeAudioCommandOpts: RuntimeCommandOpts
+---@field volume? number
+---@field name? string
+
+---@class (exact) RuntimeBgmCommandOpts: RuntimeAudioCommandOpts
+---@field channel? string
+---@field loop? boolean
+
+---@class (exact) RuntimeSpineCommandOpts: RuntimeCommandOpts
+---@field track? integer
+---@field loop? boolean
+---@field queue? boolean
+---@field delay? number
+
+---@class (exact) RuntimeResourceCommandOpts: RuntimeCommandOpts
+---@field failOnError? boolean
+
+---@class (exact) RuntimePoint
+---@field x number
+---@field y number
+
+---@class (exact) RuntimeLocaleContext
+---@field requested string
+---@field resolved string
+---@field default string
+---@field supported string[]
+---@field languageCode string
+---@field scriptCode? string
+---@field countryCode? string
+
+---@class (exact) RuntimeScreenContext
+---@field width number
+---@field height number
+
+---@class (exact) RuntimeDesignContext
+---@field width number
+---@field height number
+
+---@class (exact) RuntimeViewportContext
+---@field x number
+---@field y number
+---@field width number
+---@field height number
+---@field scaleX number
+---@field scaleY number
+---@field scaleMode RuntimeScaleMode|string
+
+---@class (exact) RuntimeContext
+---@field screen RuntimeScreenContext
+---@field design RuntimeDesignContext
+---@field viewport RuntimeViewportContext
+---@field seed integer
+---@field runtimeApiVersion integer
+---@field gameId string
+---@field gameVersion string
+---@field locale? RuntimeLocaleContext
+
+---@class RuntimeUi
+---@field style fun(base?: RuntimeNodeProps, opts?: RuntimeNodeProps): RuntimeNodeProps
+---@field with_parent fun(parent: string, opts?: RuntimeNodeProps): RuntimeNodeProps
+---@field node fun(node_type: RuntimeNodeType, id: string, opts?: RuntimeNodeInit): RuntimeNode
+---@field panel fun(id: string, x: number|RuntimeNodeInit, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field rect fun(id: string, x: number|RuntimeNodeInit, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field circle fun(id: string, x: number|RuntimeNodeInit, y?: number, size?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field line fun(id: string, x: number|RuntimeNodeInit, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field progress fun(id: string, x: number|RuntimeNodeInit, y?: number, width?: number, height?: number, value?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field particle fun(id: string, x: number|RuntimeNodeInit, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field text fun(id: string, text: string|RuntimeNodeInit, x?: number, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field button fun(id: string, text: string|RuntimeNodeInit, x?: number, y?: number, width?: number, height?: number, handler?: string, opts?: RuntimeNodeInit): RuntimeNode
+---@field list_view fun(id: string, x: number|RuntimeNodeInit, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field image fun(id: string, asset: string|RuntimeNodeInit, x?: number, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field sprite fun(id: string, asset: string|RuntimeNodeInit, x?: number, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field spine fun(id: string, asset: string|RuntimeNodeInit, x?: number, y?: number, width?: number, height?: number, animation?: string, opts?: RuntimeNodeInit): RuntimeNode
+---@field update fun(id: string, props: RuntimeNodeInit): RuntimeNodeUpdate
+---@field text_update fun(id: string, text: string): RuntimeNodeUpdate
+---@field visible_update fun(id: string, visible: boolean): RuntimeNodeUpdate
+---@field alpha_update fun(id: string, alpha: number): RuntimeNodeUpdate
+---@field scale_update fun(id: string, scale: number): RuntimeNodeUpdate
+---@field position_update fun(id: string, x: number, y: number): RuntimeNodeUpdate
+---@field size_update fun(id: string, width: number, height: number): RuntimeNodeUpdate
+---@field transform_update fun(id: string, x: number, y: number, scale: number, rotation: number): RuntimeNodeUpdate
+---@field batch_update fun(ids: string[], props: RuntimeNodeInit): RuntimeNodeUpdate[]
+---@field append fun(nodes: RuntimeNode[], node: RuntimeNode): RuntimeNode[]
+---@field append_all fun(nodes: RuntimeNode[], extra_nodes: RuntimeNode[]): RuntimeNode[]
+
+---@class (exact) RuntimeDialogButton
+---@field id? string
+---@field text string
+---@field handler string
+---@field color? string
+
+---@class (exact) RuntimeDialogOpts
+---@field screenWidth? number
+---@field screenHeight? number
+---@field overlay? boolean
+---@field overlayColor? string
+---@field blockInput? boolean
+---@field layer? integer
+---@field color? string
+---@field radius? number
+---@field panelStyle? RuntimeNodeProps
+---@field titleColor? string
+---@field titleSize? number
+---@field titleStyle? RuntimeNodeProps
+---@field messageColor? string
+---@field messageSize? number
+---@field messageStyle? RuntimeNodeProps
+---@field buttons? RuntimeDialogButton[]
+---@field buttonGap? number
+---@field buttonStyle? RuntimeNodeProps
+
+---@class RuntimeLabeledProgressOpts: RuntimeNodeInit
+---@field labelHeight? number
+---@field labelStyle? RuntimeNodeProps
+
+---@class RuntimePillOpts: RuntimeNodeInit
+---@field panelStyle? RuntimeNodeProps
+---@field textStyle? RuntimeNodeProps
+
+---@class RuntimeTextButtonOpts: RuntimeNodeInit
+---@field variant? RuntimeButtonVariant
+
+---@class RuntimeListItemOpts: RuntimeTextButtonOpts
+---@field selected? boolean
+---@field activeColor? string
+---@field inactiveColor? string
+
+---@class RuntimeTabItem
+---@field id? string
+---@field key? string
+---@field text string
+---@field handler? string
+---@field selected? boolean
+
+---@class RuntimeTabsOpts: RuntimeNodeInit
+---@field tabs? RuntimeTabItem[]
+---@field selected? string
+---@field gap? number
+---@field itemWidth? number
+---@field itemHeight? number
+---@field activeColor? string
+---@field inactiveColor? string
+---@field buttonStyle? RuntimeNodeProps
+
+---@class RuntimeActionItem
+---@field id? string
+---@field text string
+---@field handler? string
+---@field visible? boolean
+---@field color? string
+---@field style? RuntimeNodeProps
+
+---@class RuntimeActionRowOpts: RuntimeNodeInit
+---@field actions? RuntimeActionItem[]
+---@field gap? number
+---@field itemWidth? number
+---@field itemHeight? number
+---@field buttonStyle? RuntimeNodeProps
+
+---@class RuntimePanelHeaderOpts: RuntimeNodeInit
+---@field eyebrow? string
+---@field title string
+---@field summary? string
+---@field gap? number
+---@field eyebrowId? string
+---@field titleId? string
+---@field summaryId? string
+---@field eyebrowHeight? number
+---@field titleHeight? number
+---@field summaryHeight? number
+---@field eyebrowStyle? RuntimeNodeProps
+---@field titleStyle? RuntimeNodeProps
+---@field summaryStyle? RuntimeNodeProps
+
+---@class RuntimeWidgetTheme
+---@field primary? string
+---@field secondary? string
+---@field success? string
+---@field overlay? string
+---@field surface? string
+---@field surfaceAlt? string
+---@field card? string
+---@field text? string
+---@field muted? string
+---@field progress? string
+---@field transparent? string
+
+---@class RuntimeWidgets
+---@field configure fun(tokens?: RuntimeWidgetTheme): RuntimeWidgets
+---@field label fun(id: string, text: string|RuntimeNodeInit, x?: number, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field section_title fun(id: string, text: string|RuntimeNodeInit, x?: number, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field pill fun(id: string, text: string|RuntimePillOpts, x?: number, y?: number, width?: number, height?: number, opts?: RuntimePillOpts): RuntimeNode[]
+---@field text_button fun(id: string, text: string|RuntimeTextButtonOpts, x?: number, y?: number, width?: number, height?: number, handler?: string, opts?: RuntimeTextButtonOpts): RuntimeNode
+---@field list_item fun(id: string, text: string|RuntimeListItemOpts, x?: number, y?: number, width?: number, height?: number, handler?: string, opts?: RuntimeListItemOpts): RuntimeNode
+---@field tabs fun(id: string, tabs: RuntimeTabItem[]|RuntimeTabsOpts, opts?: RuntimeTabsOpts): RuntimeNode[]
+---@field action_row fun(id: string, actions: RuntimeActionItem[]|RuntimeActionRowOpts, opts?: RuntimeActionRowOpts): RuntimeNode[]
+---@field panel_header fun(id: string, opts: RuntimePanelHeaderOpts): RuntimeNode[]
+---@field overlay fun(id: string, width: number|RuntimeNodeInit, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field card fun(id: string, x: number|RuntimeNodeInit, y?: number, width?: number, height?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field progress_bar fun(id: string, x: number|RuntimeNodeInit, y?: number, width?: number, height?: number, value?: number, opts?: RuntimeNodeInit): RuntimeNode
+---@field labeled_progress fun(id: string, label: string, x: number, y: number, width: number, height: number, value: number, opts?: RuntimeLabeledProgressOpts): RuntimeNode[]
+---@field button_row fun(parent: string, id: string, buttons: RuntimeDialogButton[], x: number, y: number, width: number, height: number, gap?: number, opts?: RuntimeNodeProps): RuntimeNode[]
+---@field dialog fun(id: string, title: string, message: string, x: number, y: number, width: number, height: number, opts?: RuntimeDialogOpts): RuntimeNode[]
+
+---@class (exact) RuntimeLayoutItem
+---@field node RuntimeNode
+---@field marginLeft? number
+---@field marginRight? number
+---@field marginTop? number
+---@field marginBottom? number
+
+---@class RuntimeLayoutItemOpts
+---@field margin? number
+---@field mx? number
+---@field my? number
+---@field ml? number
+---@field mr? number
+---@field mt? number
+---@field mb? number
+---@field marginLeft? number
+---@field marginRight? number
+---@field marginTop? number
+---@field marginBottom? number
+
+---@class RuntimeLinearLayoutOpts
+---@field x? number
+---@field y? number
+---@field width? number
+---@field height? number
+---@field gap? number
+---@field align? RuntimeLayoutAlign
+---@field padding? number
+---@field paddingX? number
+---@field paddingY? number
+---@field px? number
+---@field py? number
+---@field paddingLeft? number
+---@field paddingTop? number
+
+---@class RuntimeBoxLayoutOpts: RuntimeLinearLayoutOpts
+---@field rows? integer
+---@field columns? integer
+---@field cols? integer
+---@field cellWidth? number
+---@field cellHeight? number
+---@field cellW? number
+---@field cellH? number
+---@field gapX? number
+---@field gapY? number
+---@field valign? RuntimeLayoutAlign
+
+---@class RuntimeLayout
+---@field item fun(node: RuntimeNode, opts?: RuntimeLayoutItemOpts): RuntimeLayoutItem
+---@field local_position fun(origin: RuntimePoint, position: RuntimePoint): RuntimePoint
+---@field row fun(parent?: string, items: (RuntimeNode|RuntimeLayoutItem)[], opts?: RuntimeLinearLayoutOpts): RuntimeNode[]
+---@field column fun(parent?: string, items: (RuntimeNode|RuntimeLayoutItem)[], opts?: RuntimeLinearLayoutOpts): RuntimeNode[]
+---@field stack fun(parent?: string, items: (RuntimeNode|RuntimeLayoutItem)[], opts?: RuntimeLinearLayoutOpts): RuntimeNode[]
+---@field box fun(parent?: string, items: (RuntimeNode|RuntimeLayoutItem)[], opts?: RuntimeBoxLayoutOpts): RuntimeNode[]
+
+---@class RuntimeCommands
+---@field toast fun(text: string, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field copy_text fun(text: string, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field delay fun(duration: number, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field sequence fun(items: RuntimeCommand[], opts?: RuntimeCommandOpts): RuntimeCommand
+---@field parallel fun(items: RuntimeCommand[], opts?: RuntimeCommandOpts): RuntimeCommand
+---@field move_path fun(target: string, path: RuntimePoint[], opts?: RuntimeCommandOpts): RuntimeCommand
+---@field move_to fun(target: string, x: number, y: number, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field fade_to fun(target: string, alpha: number, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field scale_to fun(target: string, scale: number, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field rotate_to fun(target: string, angle: number, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field remove_node fun(target: string, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field play_spine_animation fun(target: string, animation: string, opts?: RuntimeSpineCommandOpts): RuntimeCommand
+---@field play_sound fun(asset: string, opts?: RuntimeAudioCommandOpts): RuntimeCommand
+---@field play_bgm fun(asset: string, opts?: RuntimeBgmCommandOpts): RuntimeCommand
+---@field pause_bgm fun(channel?: string, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field resume_bgm fun(channel?: string, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field stop_bgm fun(channel?: string, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field preload_group fun(group: string, opts?: RuntimeResourceCommandOpts): RuntimeCommand
+---@field evict_group fun(group: string, opts?: RuntimeCommandOpts): RuntimeCommand
+---@field cancel_id fun(id: string): RuntimeCommand
+---@field cancel_group fun(group: string): RuntimeCommand
+---@field cancel_scope fun(scope: string): RuntimeCommand
+
+---@class RuntimeImportApi
+---@field import fun(moduleName: string): table
+
+---@type RuntimeImportApi
+runtime = runtime
+
+---@alias PlayerColor 'red'|'blue'
+---@alias GamePhase 'waiting_roll'|'waiting_piece'|'animating'
+---@alias PieceStatus 'home'|'path'|'finished'
+
+---@class (exact) PieceState
+---@field id string
+---@field owner PlayerColor
+---@field path_index integer
+---@field status PieceStatus
+
+---@class (exact) LudoState
+---@field current_player PlayerColor
+---@field phase GamePhase
+---@field dice_index integer
+---@field dice_values integer[]
+---@field dice? integer
+---@field selected_piece? string
+---@field players PlayerColor[]
+---@field pieces table<string, PieceState>
+
+---@class (exact) BoardPoint
+---@field x number
+---@field y number
+
+---@class (exact) BoardData
+---@field red_home BoardPoint[]
+---@field blue_home BoardPoint[]
+---@field path BoardPoint[]
+---@field start table<PlayerColor, integer>

example/assets/games/ludo/scripts/state.lua

@@ -0,0 +1,15 @@
+---@type LudoState
+return {
+  current_player = "red",
+  phase = "waiting_roll",
+  dice_index = 0,
+  dice_values = {6, 3, 5, 2, 6, 4},
+  selected_piece = nil,
+  players = {"red", "blue"},
+  pieces = {
+    red_1 = { id = "red_1", owner = "red", path_index = 0, status = "home" },
+    red_2 = { id = "red_2", owner = "red", path_index = 0, status = "home" },
+    blue_1 = { id = "blue_1", owner = "blue", path_index = 0, status = "home" },
+    blue_2 = { id = "blue_2", owner = "blue", path_index = 0, status = "home" }
+  }
+}

example/assets/games/ludo/scripts/styles.lua

@@ -0,0 +1,80 @@
+local theme = runtime.import("theme")
+
+local colors = theme.colors
+local styles = {}
+
+styles.layers = {
+  background = 0,
+  board = 1,
+  board_content = 2,
+  piece = 10,
+  hud = 100,
+  hud_content = 101
+}
+
+styles.board_panel = {
+  color = colors.board,
+  layer = styles.layers.background
+}
+
+styles.board_title = {
+  fontSize = 24,
+  color = colors.text,
+  layer = styles.layers.board_content
+}
+
+styles.red_home = {
+  color = colors.red_home,
+  layer = styles.layers.board
+}
+
+styles.blue_home = {
+  color = colors.blue_home,
+  layer = styles.layers.board
+}
+
+styles.path_cell = {
+  anchor = "center",
+  color = colors.path_cell,
+  layer = styles.layers.board_content
+}
+
+styles.top_bar = {
+  color = colors.top_bar,
+  layer = styles.layers.hud
+}
+
+styles.hud_text = {
+  fontSize = 22,
+  color = colors.text,
+  layer = styles.layers.hud_content
+}
+
+styles.dice_button = {
+  color = colors.dice_button,
+  fontSize = 20,
+  layer = styles.layers.hud_content
+}
+
+styles.piece_highlight = {
+  scale = 1.25,
+  alpha = 1
+}
+
+styles.piece_normal = {
+  scale = 1,
+  alpha = 0.95
+}
+
+function styles.piece(owner)
+  return {
+    anchor = "center",
+    asset = "piece_" .. owner,
+    color = colors[owner],
+    layer = styles.layers.piece,
+    interactive = true,
+    onTap = "piece_tap"
+  }
+end
+
+return styles

example/assets/games/ludo/scripts/theme.lua

@@ -0,0 +1,18 @@
+local i18n = runtime.import("i18n")
+
+return {
+  title = function()
+    return i18n.t("title")
+  end,
+  colors = {
+    red = "#ef4444",
+    blue = "#3b82f6",
+    top_bar = "#020617",
+    dice_button = "#2563eb",
+    board = "#1e293b",
+    red_home = "#7f1d1d",
+    blue_home = "#1e3a8a",
+    path_cell = "#f8fafc",
+    text = "#ffffff"
+  }
+}

example/assets/games/ludo/scripts/ui.lua

@@ -0,0 +1,74 @@
+---@type RuntimeUi
+local runtime_ui = runtime.import("runtime_ui")
+---@type RuntimeLayout
+local layout = runtime.import("layout")
+local theme = runtime.import("theme")
+local i18n = runtime.import("i18n")
+local styles = runtime.import("styles")
+local state = runtime.import("state")
+local board = runtime.import("board")
+local rules = runtime.import("rules")
+
+local ui = {}
+local board_origin = { x = 40, y = 90 }
+
+function ui.highlight_updates(ids, enabled)
+  return runtime_ui.batch_update(ids, enabled and styles.piece_highlight or styles.piece_normal)
+end
+
+function ui.create_board_nodes()
+  local nodes = {
+    runtime_ui.sprite("board_panel", "board", 40, 90, 640, 520, styles.board_panel),
+    runtime_ui.text("board_title", theme.title(), 240, 15, 180, 40, runtime_ui.with_parent("board_panel", styles.board_title)),
+    runtime_ui.panel("red_home", 20, 390, 130, 90, runtime_ui.with_parent("board_panel", styles.red_home)),
+    runtime_ui.panel("blue_home", 460, -10, 130, 90, runtime_ui.with_parent("board_panel", styles.blue_home))
+  }
+
+  for index, cell in ipairs(board.path) do
+    local pos = layout.local_position(board_origin, cell)
+    runtime_ui.append(nodes, runtime_ui.circle("cell_" .. tostring(index), pos.x, pos.y, 28, runtime_ui.with_parent("board_panel", styles.path_cell)))
+  end
+
+  for id, piece in pairs(state.pieces) do
+    local pos = rules.piece_home_position(piece)
+    runtime_ui.append(nodes, runtime_ui.circle(id, pos.x, pos.y, 44, styles.piece(piece.owner)))
+  end
+
+  return nodes
+end
+
+function ui.create_ui_nodes()
+  local hud_items = layout.row("top_bar", {
+    runtime_ui.text("turn_text", i18n.t("current_player", { player = i18n.player(state.current_player) }), 0, 0, 230, 32, styles.hud_text),
+    runtime_ui.text("dice_text", i18n.t("dice_empty"), 0, 0, 120, 32, styles.hud_text),
+    layout.item(
+      runtime_ui.button("dice_button", i18n.t("roll_button"), 0, 0, 130, 48, "roll_dice", styles.dice_button),
+      { marginLeft = 134 }
+    )
+  }, {
+    x = 24,
+    height = 76,
+    gap = 16,
+    align = "center"
+  })
+
+  local nodes = { runtime_ui.panel("top_bar", 0, 0, 720, 76, styles.top_bar) }
+  return runtime_ui.append_all(nodes, hud_items)
+end
+
+function ui.dice_and_turn_updates(dice, current_player)
+  return {
+    runtime_ui.text_update("dice_text", i18n.t("dice_value", { value = dice })),
+    runtime_ui.text_update("turn_text", i18n.t("current_player", { player = i18n.player(current_player) }))
+  }
+end
+
+function ui.dice_update(dice)
+  return { runtime_ui.text_update("dice_text", i18n.t("dice_value", { value = dice })) }
+end
+
+function ui.turn_update(current_player)
+  return { runtime_ui.text_update("turn_text", i18n.t("current_player", { player = i18n.player(current_player) })) }
+end
+
+return ui