evan
39f51ccd48
Select opens the cached catalog when its sidecar URL still matches, so browsing costs no network or TLS memory; Refresh fetches. Caches are replaced through a backup so an interrupted download cannot leave an empty catalog behind. Switch to structured log.debug/info/error milestones and add BinaryKeyboard, a two-button recursive text entry experiment.
123 lines
3.6 KiB
Lua
123 lines
3.6 KiB
Lua
-- DESCRIPTION: Two-button recursive keyboard experiment
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local KEYS = {
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"Q", "W", "E", "R", "T", "Y", "U", "I", "O", "P",
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"A", "S", "D", "F", "G", "H", "J", "K", "L",
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"Z", "X", "C", "V", "B", "N", "M"
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}
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local MAX_TEXT_BYTES = 80
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local text = ""
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local candidates = {}
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local history = {}
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local uppercase = false
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local needsDraw = true
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local firstDraw = true
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local function copyKeys(source, first, last)
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local result = {}
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for index = first, last do result[#result + 1] = source[index] end
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return result
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end
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local function resetCandidates()
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candidates = copyKeys(KEYS, 1, #KEYS)
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history = {}
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end
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local function halves()
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local midpoint = math.ceil(#candidates / 2)
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return copyKeys(candidates, 1, midpoint), copyKeys(candidates, midpoint + 1, #candidates)
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end
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local function append(value)
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if #text + #value <= MAX_TEXT_BYTES then text = text .. value end
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end
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local function chooseHalf(left)
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local leftHalf, rightHalf = halves()
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history[#history + 1] = candidates
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candidates = left and leftHalf or rightHalf
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if #candidates == 1 then
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local letter = candidates[1]
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append(uppercase and letter or letter:lower())
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resetCandidates()
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end
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needsDraw = true
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end
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local function undo()
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if #history == 0 then
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sys.exit()
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return
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end
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candidates = history[#history]
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history[#history] = nil
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needsDraw = true
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end
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local function drawPanel(x, y, width, height, title, values)
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gui.drawRoundedRect(x, y, width, height, 2, 8, COLOR_BLACK)
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gui.drawText(FONT_UI_10, x + 12, y + 32, title, COLOR_BLACK, STYLE_BOLD)
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gui.drawText(FONT_UI_12, x + 12, y + math.floor(height / 2), table.concat(values), COLOR_BLACK, STYLE_NORMAL)
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end
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local function render()
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local width = gui.width()
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local height = gui.height()
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local margin = 20
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local gap = 12
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local panelWidth = math.floor((width - margin * 2 - gap) / 2)
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local panelTop = 185
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local panelHeight = math.min(220, height - panelTop - 100)
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local leftHalf, rightHalf = halves()
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gui.clear()
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gui.drawCenteredText(FONT_UI_12, 24, "Binary Keyboard", COLOR_BLACK, STYLE_BOLD)
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gui.drawRoundedRect(margin, 65, width - margin * 2, 82, 2, 8, COLOR_BLACK)
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local visibleText = text == "" and "Type with the side buttons" or text:sub(-38)
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gui.drawText(FONT_UI_12, margin + 12, 96, visibleText, COLOR_BLACK, STYLE_NORMAL)
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local progress = string.rep("•", #history)
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gui.drawCenteredText(FONT_UI_10, 155, progress == "" and "Choose a half" or progress, COLOR_BLACK, STYLE_NORMAL)
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drawPanel(margin, panelTop, panelWidth, panelHeight, "LEFT SIDE", leftHalf)
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drawPanel(margin + panelWidth + gap, panelTop, panelWidth, panelHeight, "RIGHT SIDE", rightHalf)
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gui.drawButtonHints(#history == 0 and "Exit" or "Undo", "Space", "Delete", uppercase and "lower" or "UPPER")
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gui.refresh(firstDraw and REFRESH_HALF or REFRESH_FAST)
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firstDraw = false
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needsDraw = false
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end
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function init()
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text = ""
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uppercase = false
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firstDraw = true
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needsDraw = true
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resetCandidates()
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end
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function draw()
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if input.wasPressed("up") then
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chooseHalf(true)
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elseif input.wasPressed("down") then
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chooseHalf(false)
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elseif input.wasPressed("back") then
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undo()
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elseif input.wasPressed("confirm") then
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append(" ")
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resetCandidates()
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needsDraw = true
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elseif input.wasPressed("left") then
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if #text > 0 then text = text:sub(1, -2) end
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resetCandidates()
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needsDraw = true
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elseif input.wasPressed("right") then
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uppercase = not uppercase
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needsDraw = true
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end
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if needsDraw then render() end
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end
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