evan
1adf121dc6
sys.startApp(path, args) tears the runtime down and starts over from a file, and keeps nothing else: no history, no title, no app identity. All of that can ride in the arguments, so it does, and sdcard/.lua/lib/nav.lua is the single writer of that table. nav owns the back stack, the bar's title and /.lua/data/<AppId>, which means the launcher, what "back" reaches and how deep a route nests are editable on the card rather than in a reflash. Apps call nav.launch, nav.replace and nav.back; sys.startApp has one caller. Boot passes no arguments at all, which is how main.lua tells a cold start from a navigation and opens its own launcher, replacing the home field the runtime used to read. Arguments cross as JSON, so history is a list of tables rather than a packed string, and an app passing something JSON cannot carry sees the error at its own nav call.
76 lines
1.6 KiB
Lua
76 lines
1.6 KiB
Lua
package.path = "/.lua/lib/?.lua"
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local ui = require "ui"
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local nav = require "nav"
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local statusbar = require "statusbar"
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local APPS = "/.lua/apps/"
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---@class Main : App, TouchHandlers
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local M = {}
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---@class SlateApp
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---@field init? fun(arg?: string) Builds state before the tree is mounted.
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---@field node? fun(): NodeId The app's subtree, built inside the chrome.
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---@field draw? fun(deltaMs: integer)
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local app
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---@param args table|nil What the previous state passed to sys.startApp, or nil at boot.
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function M.start(args)
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nav.start(args)
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local dir = APPS .. nav.getRoute()
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package.path = dir .. "/?.lua;/.lua/lib/?.lua"
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app = assert(loadfile(dir .. "/main.lua"))()
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if app.init then
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app.init(nav.getArg())
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end
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ui.mount(M.node)
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timer.every(1000, statusbar.tick)
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end
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---@return NodeId
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function M.node()
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ui.setInset(statusbar.isVisible() and statusbar.height or 0)
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local body = ui.box { w = "fill", h = "fill", app.node and app.node() or nil }
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if not statusbar.isVisible() then
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return body
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end
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return ui.box { w = "fill", h = "fill", statusbar.node(), body }
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end
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function M.draw(deltaMs)
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if app.draw then
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app.draw(deltaMs)
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end
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ui.draw()
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end
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function M.onTouchDown(x, y)
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ui.down(x, y)
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if app.onTouchDown then
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app.onTouchDown(x, y)
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end
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end
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function M.onTouchMove(x, y)
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ui.move(x, y)
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if app.onTouchMove then
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app.onTouchMove(x, y)
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end
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end
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function M.onTouchUp(x, y)
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ui.up(x, y)
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if app.onTouchUp then
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app.onTouchUp(x, y)
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end
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end
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function M.onTouch(x, y)
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if app.onTouch then
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app.onTouch(x, y)
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end
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end
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return M
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