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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
-- screen_line_starting_pos: optional array of grapheme indices if it wraps over more than one screen line
-- 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=''}}
Screen_top_line = 1
Screen_bottom_line = 1
Cursor_line = 1
Cursor_pos = 1 -- in Unicode codepoints, from 1 to utf8.len(line) + 1
Screen_width, Screen_height, Screen_flags = 0, 0, nil
Cursor_x, Cursor_y = 0, 0 -- in pixels
Current_drawing_mode = 'line'
Previous_drawing_mode = nil
Line_width = nil -- maximum width available to either text or drawings, in 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')
Line_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
break
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
break
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)
for line_index,line in ipairs(Lines) do
line.y = nil
end
local y = 15
for line_index,line in ipairs(Lines) do
if y > Screen_height then break end
if line_index >= Screen_top_line then
Screen_bottom_line = line_index
if line.mode == 'text' and line.data == '' then
line.y = y
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
Text.draw_cursor(25, y)
end
y = y + math.floor(15*Zoom) -- text height
elseif line.mode == 'drawing' then
y = y+10 -- padding
line.y = y
Drawing.draw(line)
y = y + Drawing.pixels(line.h) + 10 -- padding
else
line.y = y
y = Text.draw(line, Line_width, line_index, Cursor_line, Cursor_pos)
y = y + math.floor(15*Zoom) -- text height
end
end
end
--? os.exit(1)
end
function love.update(dt)
Drawing.update(dt)
end
function love.mousepressed(x,y, mouse_button)
propagate_to_button_handlers(x,y, mouse_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, y)
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)
elseif chord == 'escape' and love.mouse.isDown('1') then
local drawing = Drawing.current_drawing()
if drawing then
drawing.pending = {}
end
elseif chord == 'pagedown' then
Screen_top_line = Screen_bottom_line
Cursor_line = Screen_top_line
Cursor_pos = 1
Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary()
elseif chord == 'pageup' then
-- duplicate some logic from love.draw
local y = Screen_height
while y >= 0 do
if Screen_top_line == 1 then break end
y = y - math.floor(15*Zoom)
if Lines[Screen_top_line].mode == 'drawing' then
y = y - Drawing.pixels(Lines[Screen_top_line].h)
end
Screen_top_line = Screen_top_line - 1
end
if Cursor_line ~= Screen_top_line then
Cursor_pos = 1
end
Cursor_line = Screen_top_line
Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary()
else
Text.keychord_pressed(chord)
end
end
function love.keyreleased(key, scancode)
end
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