3019442c02
love.graphics.line(1, 1, 500, 500) However, we're now no longer printing results or errors. Time now to design the data model. When do we (re)evaluate code. When do we display results. Where do errors go.
97 lines
2.2 KiB
Lua
97 lines
2.2 KiB
Lua
require 'keychord'
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local utf8 = require 'utf8'
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lines = {}
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width, height, flags = 0, 0, nil
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exec_payload = nil
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function love.load()
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table.insert(lines, '')
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love.window.setMode(0, 0) -- maximize
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width, height, flags = love.window.getMode()
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love.keyboard.setTextInput(true) -- bring up keyboard on touch screen
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end
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function love.draw()
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love.graphics.setColor(1, 1, 1)
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love.graphics.rectangle('fill', 1, 1, width-1, height-1)
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love.graphics.setColor(1, 1, 0)
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love.graphics.rectangle('fill', 1, 1, 400, 10*12)
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love.graphics.setColor(0, 0, 0)
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local text
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for i, line in ipairs(lines) do
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text = love.graphics.newText(love.graphics.getFont(), line)
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love.graphics.draw(text, 12, i*15)
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end
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-- cursor
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love.graphics.print('_', 12+text:getWidth(), #lines*15)
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if exec_payload then
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call_gather(exec_payload)
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end
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end
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function love.update(dt)
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end
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function love.textinput(t)
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lines[#lines] = lines[#lines]..t
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end
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function keychord_pressed(chord)
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-- Don't handle any keys here that would trigger love.textinput above.
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if chord == 'return' then
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table.insert(lines, '')
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elseif chord == 'backspace' then
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if #lines > 1 and lines[#lines] == '' then
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table.remove(lines)
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else
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local byteoffset = utf8.offset(lines[#lines], -1)
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if byteoffset then
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lines[#lines] = string.sub(lines[#lines], 1, byteoffset-1)
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end
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end
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elseif chord == 'C-r' then
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eval(lines[#lines])
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--? lines[#lines+1] = eval(lines[#lines])[1]
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--? lines[#lines+1] = ''
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end
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end
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function love.keyreleased(key, scancode)
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end
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function love.mousepressed(x, y, button)
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end
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function love.mousereleased(x, y, button)
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end
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function eval(buf)
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local f = load('return '..buf, 'REPL')
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if f then
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exec_payload = f
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return
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--? return call_gather(f)
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end
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local f, err = load(buf, 'REPL')
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if f then
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exec_payload = f
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return
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--? return call_gather(f)
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else
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return {err}
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end
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end
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-- based on https://github.com/hoelzro/lua-repl
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function call_gather(f)
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local success, results = gather_results(xpcall(f, function(...) return debug.traceback() end))
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return results
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end
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function gather_results(success, ...)
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local n = select('#', ...)
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return success, { n = n, ... }
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end
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