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.
78 lines
2.9 KiB
Lua
78 lines
2.9 KiB
Lua
-- Run: lua test/statusbar_dirty.lua
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-- The bar is part of the tree, so a tick has to repaint the field that changed and leave
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-- the rest of the screen alone. The clock is pinned unsynced so its text is constant and
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-- every other field can be steered on its own.
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package.path = "sdcard/.lua/lib/?.lua;test/?.lua;" .. package.path
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local device = require("fake_device").install()
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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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device.clockSynced = false
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-- History is the arguments this state was started with, so a route to go back to is
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-- stated the way main.lua would have received it.
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nav.start { app = "Settings", history = { { app = "Home" } } }
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-- What main.lua builds, minus the app: chrome above, whatever is left below.
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local function screen()
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if not statusbar.isVisible() then
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return ui.box { w = "fill", h = "fill" }
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end
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return ui.box { w = "fill", h = "fill", statusbar.node(), ui.box { w = "fill", h = "fill" } }
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end
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ui.mount(screen)
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local built = tree.getCount()
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assert(device.labelled "--:--:--", "the bar built no clock")
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assert(device.labelled "117kB", "the bar built no memory slot")
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assert(device.labelled(nav.getTitle()), "the bar built no title")
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local function tick()
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device.invalidated = {}
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statusbar.tick()
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return #device.invalidated
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end
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assert(tick() == 0, "an unchanged bar repaints nothing")
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device.freeHeap = device.freeHeap - 32000
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assert(tick() == 1, "only the memory slot repaints")
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assert(device.labelled "148kB", "the memory slot kept its old text")
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assert(tree.getCount() == built, "a field update rebuilt the screen")
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device.status = { state = "connected", ssid = "x", ip = "", rssi = -50 }
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assert(tick() == 1, "the signal strength repaints the icon and nothing else")
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assert(tick() == 0, "and settles again afterwards")
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-- A longer title needs a wider box, which only a rebuild can give it.
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nav.setTitle "settings - wifi"
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statusbar.tick()
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assert(device.labelled "settings - wifi", "a renamed app did not reach the bar")
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assert(tick() == 0, "and settles again afterwards")
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-- The back control is offered only when there is somewhere to go back to. It carries no
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-- label, so it is counted as what it is: the one thing in the bar a finger can press.
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local function pressable()
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local count = 0
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for _, entry in ipairs(device.nodes) do
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if entry.interactive then
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count = count + 1
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end
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end
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return count
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end
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assert(pressable() == 1, "the bar offered no back control with history behind it")
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nav.start { app = "Settings" }
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ui.rebuild()
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assert(pressable() == 0, "the bar offered back with no history behind it")
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-- Fullscreen is chrome choosing not to build itself, so the app's node is the whole tree.
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statusbar.setFullscreen(true)
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assert(not device.labelled "--:--:--", "the bar survived fullscreen")
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statusbar.setFullscreen(false)
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assert(device.labelled "--:--:--", "the bar did not come back")
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print "ok"
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