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local utf8 = require 'utf8'
require 'keychord'
require 'file'
require 'button'
local Text = require 'text'
local Drawing = require 'drawing'
local geom = require 'geom'
require 'help'
require 'icons'
-- a line is either text or a drawing
-- a text is a table with:
-- mode = 'text'
-- string data
-- a drawing is a table with:
-- mode = 'drawing'
-- a (y) coord in pixels (updated while painting screen),
-- a (h)eight,
-- an array of points, and
-- an array of shapes
-- a shape is a table containing:
-- a mode
-- an array points for mode 'freehand' (raw x,y coords; freehand drawings don't pollute the points array of a drawing)
-- an array vertices for mode 'polygon', 'rectangle', 'square'
-- p1, p2 for mode 'line'
-- p1, p2, arrow-mode for mode 'arrow-line'
-- center, radius for mode 'circle'
-- center, radius, start_angle, end_angle for mode 'arc'
-- Unless otherwise specified, coord fields are normalized; a drawing is always 256 units wide
-- The field names are carefully chosen so that switching modes in midstream
-- remembers previously entered points where that makes sense.
--
-- Open question: how to maintain Sketchpad-style constraints? Answer for now:
-- we don't. Constraints operate only for the duration of a drawing operation.
-- We'll continue to persist them just to keep the option open to continue
-- solving for them. But for now, this is a program to create static drawings
-- once, and read them passively thereafter.
Lines = {{mode='text', data=''}}
Cursor_line = 1
-- this is a line
-- ^cursor_pos = 1
-- ^cursor_pos = 2
-- ...
-- ^cursor_pos past end of line is 15
Cursor_pos = #Lines[Cursor_line].data+1 -- in Unicode codepoints
Screen_width, Screen_height, Screen_flags = 0, 0, nil
Current_drawing_mode = 'line'
Previous_drawing_mode = nil
-- All drawings span 100% of some conceptual 'page width' and divide it up
-- into 256 parts. `Drawing_width` describes their width in pixels.
Drawing_width = nil -- pixels
Zoom = 1.5
Filename = 'lines.txt'
function love.load(arg)
-- maximize window
love.window.setMode(0, 0) -- maximize
Screen_width, Screen_height, Screen_flags = love.window.getMode()
-- shrink slightly to account for window decoration
Screen_width = Screen_width-100
Screen_height = Screen_height-100
love.window.setMode(Screen_width, Screen_height)
love.window.setTitle('Text with Lines')
Drawing_width = math.floor(Screen_width/2/40)*40
love.keyboard.setTextInput(true) -- bring up keyboard on touch screen
love.keyboard.setKeyRepeat(true)
if #arg > 0 then
Filename = arg[1]
end
Lines = load_from_disk(Filename)
for i,line in ipairs(Lines) do
if line.mode == 'text' then
Cursor_line = i
end
end
love.window.setTitle('Text with Lines - '..Filename)
end
function love.filedropped(file)
Filename = file:getFilename()
file:open('r')
Lines = load_from_file(file)
file:close()
for i,line in ipairs(Lines) do
if line.mode == 'text' then
Cursor_line = i
end
end
love.window.setTitle('Text with Lines - '..Filename)
end
function love.draw()
button_handlers = {}
love.graphics.setColor(1, 1, 1)
love.graphics.rectangle('fill', 0, 0, Screen_width-1, Screen_height-1)
love.graphics.setColor(0, 0, 0)
local y = 0
for line_index,line in ipairs(Lines) do
y = y+15*Zoom
line.y = y
if line.mode == 'text' and line.data == '' then
button('draw', {x=4,y=y+4, w=12,h=12, color={1,1,0},
icon = icon.insert_drawing,
onpress1 = function()
table.insert(Lines, line_index, {mode='drawing', y=y, h=256/2, points={}, shapes={}, pending={}})
if Cursor_line >= line_index then
Cursor_line = Cursor_line+1
end
end})
if line_index == Cursor_line then
love.graphics.setColor(0,0,0)
love.graphics.print('_', 25, y+6) -- drop the cursor down a bit to account for the increased font size
end
elseif line.mode == 'drawing' then
y = y+Drawing.pixels(line.h)
Drawing.draw(line, y)
else
Text.draw(line, line_index, Cursor_line, y, Cursor_pos)
end
end
end
function love.update(dt)
if Lines.current == nil then return end
local drawing = Lines.current
assert(drawing.mode == 'drawing')
local x, y = love.mouse.getX(), love.mouse.getY()
if love.mouse.isDown('1') then
if Drawing.in_drawing(drawing, x,y) then
if drawing.pending.mode == 'freehand' then
table.insert(drawing.pending.points, {x=Drawing.coord(love.mouse.getX()-16), y=Drawing.coord(love.mouse.getY()-drawing.y)})
elseif drawing.pending.mode == 'move' then
local mx,my = Drawing.coord(x-16), Drawing.coord(y-drawing.y)
drawing.pending.target_point.x = mx
drawing.pending.target_point.y = my
end
end
elseif Current_drawing_mode == 'move' then
if Drawing.in_drawing(drawing, x, y) then
local mx,my = Drawing.coord(x-16), Drawing.coord(y-drawing.y)
drawing.pending.target_point.x = mx
drawing.pending.target_point.y = my
end
end
end
function love.mousepressed(x,y, button)
propagate_to_button_handlers(x,y, button)
for line_index,line in ipairs(Lines) do
if line.mode == 'text' then
if Text.in_line(line, x,y) then
Text.move_cursor(line_index, line, x)
end
elseif line.mode == 'drawing' then
if Drawing.in_drawing(line, x, y) then
Drawing.mouse_pressed(line, x,y, button)
end
end
end
end
function love.mousereleased(x,y, button)
Drawing.mouse_released(x,y, button)
end
function keychord_pressed(chord)
if love.mouse.isDown('1') or chord:sub(1,2) == 'C-' then
Drawing.keychord_pressed(chord)
else
Text.keychord_pressed(chord)
end
end
function love.keyreleased(key, scancode)
end
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