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pre { line-height: 125%; }
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span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
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MIT/X Consortium License

(C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
(C)opyright MMVI Sander van Dijk <a dot h dot vandijk at gmail dot com>

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the 
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in 
all copies or substantial portions of the Software. 

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
DEALINGS IN THE SOFTWARE.
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-11-14 05:45:01 +0000
Generic.EmphStrong */ .highlight .gr { color: #aa0000 } /* Generic.Error */ .highlight .gh { color: #333333 } /* Generic.Heading */ .highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */ .highlight .go { color: #888888 } /* Generic.Output */ .highlight .gp { color: #555555 } /* Generic.Prompt */ .highlight .gs { font-weight: bold } /* Generic.Strong */ .highlight .gu { color: #666666 } /* Generic.Subheading */ .highlight .gt { color: #aa0000 } /* Generic.Traceback */ .highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */ .highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */ .highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */ .highlight .kp { color: #008800 } /* Keyword.Pseudo */ .highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */ .highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */ .highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */ .highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */ .highlight .na { color: #336699 } /* Name.Attribute */ .highlight .nb { color: #003388 } /* Name.Builtin */ .highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */ .highlight .no { color: #003366; font-weight: bold } /* Name.Constant */ .highlight .nd { color: #555555 } /* Name.Decorator */ .highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */ .highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */ .highlight .nl { color: #336699; font-style: italic } /* Name.Label */ .highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */ .highlight .py { color: #336699; font-weight: bold } /* Name.Property */ .highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */ .highlight .nv { color: #336699 } /* Name.Variable */ .highlight .ow { color: #008800 } /* Operator.Word */ .highlight .w { color: #bbbbbb } /* Text.Whitespace */ .highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */ .highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */ .highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */ .highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */ .highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */ .highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */ .highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */ .highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */ .highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */ .highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
require 'keychord'
require 'button'
require 'repl'
local utf8 = require 'utf8'

lines = {}
width, height, flags = 0, 0, nil
exec_payload = nil

function love.load()
  table.insert(lines, '')
  love.window.setMode(0, 0)  -- maximize
  width, height, flags = love.window.getMode()
  love.keyboard.setTextInput(true)  -- bring up keyboard on touch screen
end

function love.draw()
  button_handlers = {}
  love.graphics.setColor(1, 1, 1)
  love.graphics.rectangle('fill', 1, 1, width-1, height-1)
  love.graphics.setColor(0, 0, 0)
  local text
  local y = 0
  for i, line in ipairs(lines) do
    y = y+25
    text = love.graphics.newText(love.graphics.getFont(), line)
    if line == '' then
      button('draw', {x=4,y=y+4, w=12,h=12, color={1,1,0},
        icon = function(x,y)
                 love.graphics.setColor(0.7,0.7,0.7)
                 love.graphics.rectangle('line', x,y, 12,12)
                 love.graphics.line(4,y+6, 16,y+6)
                 love.graphics.line(10,y, 10,y+12)
                 love.graphics.setColor(0, 0, 0)
               end,
        onpress1 = function()
                     table.insert(lines, i, {y=y, w=400, h=200, pending={}, shapes={}})
                   end})
    elseif type(line) == 'table' then
      -- line drawing
      love.graphics.setColor(0.75,0.75,0.75)
      line.y = y
      love.graphics.rectangle('line', 12,y, line.w,line.h)
      y = y+line.h

      for _,shape in ipairs(line.shapes) do
        if on_freehand(love.mouse.getX(),love.mouse.getY(), shape) then
          love.graphics.setColor(1,0,0)
        else
          love.graphics.setColor(0,0,0)
        end
        prev = nil
        for _,point in ipairs(shape) do
          if prev then
            love.graphics.line(prev.x,prev.y, point.x,point.y)
          end
          prev = point
        end
      end
      prev = nil
      for _,point in ipairs(line.pending) do
        if prev then
          love.graphics.line(prev.x,prev.y, point.x,point.y)
        end
        prev = point
      end
    else
      love.graphics.draw(text, 25,y, 0, 1.5)
    end
  end
  -- cursor
  love.graphics.print('_', 25+text:getWidth()*1.5, y)

  -- display side effect
  if exec_payload then
    run(exec_payload)
  end
end

function love.update(dt)
  if love.mouse.isDown('1') then
    if lines.current then
      local drawing = lines.current
      if type(drawing) == 'table' then
        local x, y = love.mouse.getX(), love.mouse.getY()
        if y >= drawing.y and y < drawing.y + drawing.h and x >= 12 and x < 12+drawing.w then
          table.insert(drawing.pending, {x=love.mouse.getX(), y=love.mouse.getY()})
        end
      end
    end
  end
end

function love.mousepressed(x,y, button)
  propagate_to_button_handers(x,y, button)
  propagate_to_drawings(x,y, button)
end

function propagate_to_drawings(x,y, button)
  for i,drawing in ipairs(lines) do
    if type(drawing) == 'table' then
      local x, y = love.mouse.getX(), love.mouse.getY()
      if y >= drawing.y and y < drawing.y + drawing.h and x >= 12 and x < 12+drawing.w then
        lines.current = drawing
      end
    end
  end
end

function on_freehand(x,y, shape)
  local prev
  for _,p in ipairs(shape) do
    if prev then
      if on_line(x,y, {x1=prev.x,y1=prev.y, x2=p.x,y2=p.y}) then
        return true
      end
    end
    prev = p
  end
  return false
end

function on_line(x,y, shape)
  if shape.x1 == shape.x2 then
    local y1,y2 = shape.y1,shape.y2
    if y1 > y2 then
      y1,y2 = y2,y2
    end
    return y >= y1 and y <= y2
  end
  -- has the right slope and intercept
  local m = (shape.y2 - shape.y1) / (shape.x2 - shape.x1)
  local yp = shape.y1 + m*(x-shape.x1)
  if yp < 0.95*y or yp > 1.05*y then
    return false
  end
  -- between endpoints
  local k = (x-shape.x1) / (shape.x2-shape.x1)
  return k > -0.05 and k < 1.05
end

function love.mousereleased(x,y, button)
  if lines.current then
    if lines.current.pending then
      table.insert(lines.current.shapes, lines.current.pending)
      lines.current.pending = {}
      lines.current = nil
    end
  end
end

function love.textinput(t)
  lines[#lines] = lines[#lines]..t
end

function keychord_pressed(chord)
  -- Don't handle any keys here that would trigger love.textinput above.
  if chord == 'return' then
    table.insert(lines, '')
  elseif chord == 'backspace' then
    if #lines > 1 and lines[#lines] == '' then
      table.remove(lines)
    else
      local byteoffset = utf8.offset(lines[#lines], -1)
      if byteoffset then
        lines[#lines] = string.sub(lines[#lines], 1, byteoffset-1)
      end
    end
  elseif chord == 'C-r' then
    lines[#lines+1] = eval(lines[#lines])[1]
    lines[#lines+1] = ''
  elseif chord == 'C-d' then
    parse_into_exec_payload(lines[#lines])
  elseif chord == 'C-l' then
    for i,drawing in ipairs(lines) do
      if type(drawing) == 'table' then
        local x, y = love.mouse.getX(), love.mouse.getY()
        if y >= drawing.y and y < drawing.y + drawing.h and x >= 12 and x < 12+drawing.w then
          for j,shape in ipairs(drawing.shapes) do
            if on_freehand(love.mouse.getX(),love.mouse.getY(), shape) then
              convert_line(drawing,j,shape)
            end
          end
        end
      end
    end
  end
end

function convert_line(drawing, i, shape)
  -- Perhaps we should do a more sophisticated "simple linear regression"
  -- here:
  --   https://en.wikipedia.org/wiki/Linear_regression#Simple_and_multiple_linear_regression
  -- But this works well enough for close-to-linear strokes.
  drawing.shapes[i] = {shape[1], shape[#shape]}
end

function love.keyreleased(key, scancode)
end
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-11-14 05:45:00 +0000