578 lines
19 KiB
Lua
578 lines
19 KiB
Lua
local utf8 = require 'utf8'
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require 'app'
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require 'test'
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require 'keychord'
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require 'file'
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require 'button'
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local Text = require 'text'
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local Drawing = require 'drawing'
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local geom = require 'geom'
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require 'help'
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require 'icons'
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require 'main_tests'
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-- run in both tests and a real run
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function App.initialize_globals()
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-- a line is either text or a drawing
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-- a text is a table with:
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-- mode = 'text',
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-- string data,
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-- startpos, the index of data the line starts rendering from (if currently on screen), can only be >1 for topmost line on screen
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-- starty, the y coord in pixels
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-- some cached data that's blown away and recomputed when data changes:
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-- fragments: snippets of rendered love.graphics.Text, guaranteed to not wrap
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-- screen_line_starting_pos: optional array of grapheme indices if it wraps over more than one screen line
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-- a drawing is a table with:
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-- mode = 'drawing'
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-- a (y) coord in pixels (updated while painting screen),
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-- a (h)eight,
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-- an array of points, and
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-- an array of shapes
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-- a shape is a table containing:
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-- a mode
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-- an array points for mode 'freehand' (raw x,y coords; freehand drawings don't pollute the points array of a drawing)
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-- an array vertices for mode 'polygon', 'rectangle', 'square'
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-- p1, p2 for mode 'line'
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-- center, radius for mode 'circle'
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-- center, radius, start_angle, end_angle for mode 'arc'
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-- Unless otherwise specified, coord fields are normalized; a drawing is always 256 units wide
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-- The field names are carefully chosen so that switching modes in midstream
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-- remembers previously entered points where that makes sense.
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Lines = {{mode='text', data=''}}
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-- Lines can be too long to fit on screen, in which case they _wrap_ into
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-- multiple _screen lines_.
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--
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-- Therefore, any potential location for the cursor can be described in two ways:
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-- * schema 1: As a combination of line index and position within a line (in utf8 codepoint units)
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-- * schema 2: As a combination of line index, screen line index within the line, and a position within the screen line.
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--
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-- Most of the time we'll only persist positions in schema 1, translating to
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-- schema 2 when that's convenient.
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--
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-- Make sure these coordinates are never aliased, so that changing one causes
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-- action at a distance.
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Screen_top1 = {line=1, pos=1} -- position of start of screen line at top of screen
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Cursor1 = {line=1, pos=1} -- position of cursor
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Screen_bottom1 = {line=1, pos=1} -- position of start of screen line at bottom of screen
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Selection1 = {}
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Old_cursor1, Old_selection1, Mousepress_shift = nil -- some extra state to compute selection between mouse press and release
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Recent_mouse = {} -- when selecting text, avoid recomputing some state on every single frame
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Cursor_x, Cursor_y = 0, 0 -- in pixels
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Current_drawing_mode = 'line'
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Previous_drawing_mode = nil
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-- values for tests
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Font_height = 14
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Line_height = 15
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-- widest possible character width
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Em = App.newText(love.graphics.getFont(), 'm')
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Margin_top = 15
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Margin_left = 25
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Margin_right = 25
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Margin_width = Margin_left + Margin_right
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Drawing_padding_top = 10
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Drawing_padding_bottom = 10
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Drawing_padding_height = Drawing_padding_top + Drawing_padding_bottom
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Filename = love.filesystem.getUserDirectory()..'/lines.txt'
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Next_save = nil
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-- undo
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History = {}
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Next_history = 1
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-- search
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Search_term = nil
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Search_text = nil
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Search_backup = nil -- stuff to restore when cancelling search
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-- resize
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Last_resize_time = nil
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-- blinking cursor
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Cursor_time = 0
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end -- App.initialize_globals
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function App.initialize(arg)
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love.keyboard.setTextInput(true) -- bring up keyboard on touch screen
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love.keyboard.setKeyRepeat(true)
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love.graphics.setBackgroundColor(1,1,1)
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if love.filesystem.getInfo('config') then
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load_settings()
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else
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load_defaults()
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end
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if #arg > 0 then
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Filename = arg[1]
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Lines = load_from_disk(Filename)
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Screen_top1 = {line=1, pos=1}
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Cursor1 = {line=1, pos=1}
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for i,line in ipairs(Lines) do
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if line.mode == 'text' then
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Cursor1.line = i
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break
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end
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end
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else
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Lines = load_from_disk(Filename)
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if Cursor1.line > #Lines or Lines[Cursor1.line].mode ~= 'text' then
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for i,line in ipairs(Lines) do
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if line.mode == 'text' then
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Cursor1.line = i
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break
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end
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end
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end
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end
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love.window.setTitle('lines.love - '..Filename)
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if #arg > 1 then
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print('ignoring commandline args after '..arg[1])
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end
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if rawget(_G, 'jit') then
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jit.off()
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jit.flush()
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end
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end
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function load_settings()
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-- maximize window to determine maximum allowable dimensions
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love.window.setMode(0, 0) -- maximize
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App.screen.width, App.screen.height, App.screen.flags = love.window.getMode()
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--
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local settings = json.decode(love.filesystem.read('config'))
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love.window.setPosition(settings.x, settings.y, settings.displayindex)
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App.screen.width, App.screen.height, App.screen.flags = love.window.getMode()
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App.screen.flags.resizable = true
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App.screen.flags.minwidth = math.min(App.screen.width, 200)
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App.screen.flags.minheight = math.min(App.screen.width, 200)
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App.screen.width, App.screen.height = settings.width, settings.height
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love.window.setMode(App.screen.width, App.screen.height, App.screen.flags)
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Filename = settings.filename
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initialize_font_settings(settings.font_height)
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Screen_top1 = settings.screen_top
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Cursor1 = settings.cursor
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end
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function load_defaults()
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initialize_font_settings(20)
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initialize_window_geometry()
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end
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function initialize_window_geometry()
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-- maximize window
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love.window.setMode(0, 0) -- maximize
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App.screen.width, App.screen.height, App.screen.flags = love.window.getMode()
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-- shrink slightly to account for window decoration
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App.screen.width = 40*App.width(Em)
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App.screen.height = App.screen.height-100
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App.screen.flags.resizable = true
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App.screen.flags.minwidth = math.min(App.screen.width, 200)
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App.screen.flags.minheight = math.min(App.screen.width, 200)
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love.window.setMode(App.screen.width, App.screen.height, App.screen.flags)
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end
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function App.resize(w, h)
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--? print(("Window resized to width: %d and height: %d."):format(w, h))
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App.screen.width, App.screen.height = w, h
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Text.redraw_all()
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Selection1 = {} -- no support for shift drag while we're resizing
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Text.tweak_screen_top_and_cursor()
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Last_resize_time = App.getTime()
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end
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function initialize_font_settings(font_height)
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Font_height = font_height
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love.graphics.setFont(love.graphics.newFont(Font_height))
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Line_height = math.floor(font_height*1.3)
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Em = App.newText(love.graphics.getFont(), 'm')
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end
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function App.filedropped(file)
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-- first make sure to save edits on any existing file
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if Next_save then
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save_to_disk(Lines, Filename)
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end
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-- clear the slate for the new file
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App.initialize_globals() -- in particular, forget all undo history
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Filename = file:getFilename()
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file:open('r')
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Lines = load_from_file(file)
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file:close()
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for i,line in ipairs(Lines) do
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if line.mode == 'text' then
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Cursor1.line = i
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break
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end
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end
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love.window.setTitle('Text with Lines - '..Filename)
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end
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function App.draw()
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Button_handlers = {}
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love.graphics.setColor(0, 0, 0)
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--? print(Screen_top1.line, Screen_top1.pos, Cursor1.line, Cursor1.pos)
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assert(Text.le1(Screen_top1, Cursor1))
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Cursor_y = -1
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local y = Margin_top
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--? print('== draw')
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for line_index = Screen_top1.line,#Lines do
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local line = Lines[line_index]
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--? print('draw:', y, line_index, line)
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if y + Line_height > App.screen.height then break end
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Screen_bottom1.line = line_index
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if line.mode == 'text' and line.data == '' then
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line.starty = y
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line.startpos = 1
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-- insert new drawing
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button('draw', {x=4,y=y+4, w=12,h=12, color={1,1,0},
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icon = icon.insert_drawing,
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onpress1 = function()
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Drawing.before = snapshot(line_index-1, line_index)
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table.insert(Lines, line_index, {mode='drawing', y=y, h=256/2, points={}, shapes={}, pending={}})
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if Cursor1.line >= line_index then
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Cursor1.line = Cursor1.line+1
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end
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schedule_save()
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record_undo_event({before=Drawing.before, after=snapshot(line_index-1, line_index+1)})
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end
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})
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if Search_term == nil then
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if line_index == Cursor1.line then
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Text.draw_cursor(Margin_left, y)
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end
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end
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Screen_bottom1.pos = Screen_top1.pos
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y = y + Line_height
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elseif line.mode == 'drawing' then
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y = y+Drawing_padding_top
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line.y = y
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Drawing.draw(line)
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y = y + Drawing.pixels(line.h) + Drawing_padding_bottom
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else
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line.starty = y
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line.startpos = 1
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if line_index == Screen_top1.line then
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line.startpos = Screen_top1.pos
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end
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--? print('text.draw', y, line_index)
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y, Screen_bottom1.pos = Text.draw(line, line_index)
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y = y + Line_height
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--? print('=> y', y)
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end
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end
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if Cursor_y == -1 then
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Cursor_y = App.screen.height
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end
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--? print('screen bottom: '..tostring(Screen_bottom1.pos)..' in '..tostring(Lines[Screen_bottom1.line].data))
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if Search_term then
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Text.draw_search_bar()
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end
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end
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function App.update(dt)
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Cursor_time = Cursor_time + dt
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-- some hysteresis while resizing
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if Last_resize_time then
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if App.getTime() - Last_resize_time < 0.1 then
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return
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else
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Last_resize_time = nil
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end
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end
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Drawing.update(dt)
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if Next_save and Next_save < App.getTime() then
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save_to_disk(Lines, Filename)
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Next_save = nil
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end
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end
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function schedule_save()
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if Next_save == nil then
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Next_save = App.getTime() + 3 -- short enough that you're likely to still remember what you did
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end
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end
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function love.quit()
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-- make sure to save before quitting
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if Next_save then
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save_to_disk(Lines, Filename)
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end
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-- save some important settings
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local x,y,displayindex = love.window.getPosition()
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local filename = Filename
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if filename:sub(1,1) ~= '/' then
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filename = love.filesystem.getWorkingDirectory()..'/'..filename -- '/' should work even on Windows
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end
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local settings = {
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x=x, y=y, displayindex=displayindex,
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width=App.screen.width, height=App.screen.height,
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font_height=Font_height,
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filename=filename,
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screen_top=Screen_top1, cursor=Cursor1}
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love.filesystem.write('config', json.encode(settings))
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end
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function App.mousepressed(x,y, mouse_button)
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if Search_term then return end
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-- ensure cursor is visible immediately after it moves
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Cursor_time = 0
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--? print('press', Selection1.line, Selection1.pos)
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propagate_to_button_handlers(x,y, mouse_button)
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for line_index,line in ipairs(Lines) do
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if line.mode == 'text' then
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if Text.in_line(line_index,line, x,y) then
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-- delicate dance between cursor, selection and old cursor/selection
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-- scenarios:
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-- regular press+release: sets cursor, clears selection
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-- shift press+release:
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-- sets selection to old cursor if not set otherwise leaves it untouched
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-- sets cursor
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-- press and hold to start a selection: sets selection on press, cursor on release
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-- press and hold, then press shift: ignore shift
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-- i.e. mousereleased should never look at shift state
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Old_cursor1 = Cursor1
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Old_selection1 = Selection1
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Mousepress_shift = App.shift_down()
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Selection1 = {line=line_index, pos=Text.to_pos_on_line(line, x, y)}
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--? print('selection', Selection1.line, Selection1.pos)
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break
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end
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elseif line.mode == 'drawing' then
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if Drawing.in_drawing(line, x, y) then
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Lines.current_drawing_index = line_index
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Lines.current_drawing = line
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Drawing.before = snapshot(line_index)
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Drawing.mouse_pressed(line, x,y, button)
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break
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end
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end
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end
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end
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function App.mousereleased(x,y, button)
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if Search_term then return end
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--? print('release')
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-- ensure cursor is visible immediately after it moves
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Cursor_time = 0
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if Lines.current_drawing then
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Drawing.mouse_released(x,y, button)
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schedule_save()
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if Drawing.before then
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record_undo_event({before=Drawing.before, after=snapshot(Lines.current_drawing_index)})
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Drawing.before = nil
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end
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else
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for line_index,line in ipairs(Lines) do
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if line.mode == 'text' then
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if Text.in_line(line_index,line, x,y) then
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--? print('reset selection')
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Cursor1 = {line=line_index, pos=Text.to_pos_on_line(line, x, y)}
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--? print('cursor', Cursor1.line, Cursor1.pos)
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if Mousepress_shift then
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if Old_selection1.line == nil then
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Selection1 = Old_cursor1
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else
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Selection1 = Old_selection1
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end
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end
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Old_cursor1, Old_selection1, Mousepress_shift = nil
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if eq(Cursor1, Selection1) then
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Selection1 = {}
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end
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break
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end
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end
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end
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--? print('selection:', Selection1.line, Selection1.pos)
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end
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end
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function App.textinput(t)
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-- ensure cursor is visible immediately after it moves
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Cursor_time = 0
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for _,line in ipairs(Lines) do line.y = nil end -- just in case we scroll
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if Search_term then
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Search_term = Search_term..t
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Search_text = nil
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Text.search_next()
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elseif Current_drawing_mode == 'name' then
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local before = snapshot(Lines.current_drawing_index)
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local drawing = Lines.current_drawing
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local p = drawing.points[drawing.pending.target_point]
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p.name = p.name..t
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record_undo_event({before=before, after=snapshot(Lines.current_drawing_index)})
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else
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Text.textinput(t)
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end
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schedule_save()
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end
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function App.keychord_pressed(chord, key)
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-- ensure cursor is visible immediately after it moves
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Cursor_time = 0
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if Selection1.line and
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not Lines.current_drawing and
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-- printable character created using shift key => delete selection
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-- (we're not creating any ctrl-shift- or alt-shift- combinations using regular/printable keys)
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(not App.shift_down() or utf8.len(key) == 1) and
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chord ~= 'C-c' and chord ~= 'C-x' and chord ~= 'backspace' and backspace ~= 'delete' and not App.is_cursor_movement(chord) then
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Text.delete_selection()
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end
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if Search_term then
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if chord == 'escape' then
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Search_term = nil
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Search_text = nil
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Cursor1 = Search_backup.cursor
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Screen_top1 = Search_backup.screen_top
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Search_backup = nil
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Text.redraw_all() -- if we're scrolling, reclaim all fragments to avoid memory leaks
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elseif chord == 'return' then
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Search_term = nil
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Search_text = nil
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Search_backup = nil
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elseif chord == 'backspace' then
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local len = utf8.len(Search_term)
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local byte_offset = Text.offset(Search_term, len)
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Search_term = string.sub(Search_term, 1, byte_offset-1)
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Search_text = nil
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elseif chord == 'down' then
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Cursor1.pos = Cursor1.pos+1
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Text.search_next()
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elseif chord == 'up' then
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Text.search_previous()
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end
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return
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elseif chord == 'C-f' then
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Search_term = ''
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Search_backup = {cursor={line=Cursor1.line, pos=Cursor1.pos}, screen_top={line=Screen_top1.line, pos=Screen_top1.pos}}
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assert(Search_text == nil)
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elseif chord == 'C-=' then
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initialize_font_settings(Font_height+2)
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Text.redraw_all()
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elseif chord == 'C--' then
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initialize_font_settings(Font_height-2)
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Text.redraw_all()
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elseif chord == 'C-0' then
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initialize_font_settings(20)
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Text.redraw_all()
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elseif chord == 'C-z' then
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for _,line in ipairs(Lines) do line.y = nil end -- just in case we scroll
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local event = undo_event()
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if event then
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local src = event.before
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Screen_top1 = deepcopy(src.screen_top)
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Cursor1 = deepcopy(src.cursor)
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Selection1 = deepcopy(src.selection)
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patch(Lines, event.after, event.before)
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Text.redraw_all() -- if we're scrolling, reclaim all fragments to avoid memory leaks
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schedule_save()
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end
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elseif chord == 'C-y' then
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for _,line in ipairs(Lines) do line.y = nil end -- just in case we scroll
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local event = redo_event()
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if event then
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local src = event.after
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Screen_top1 = deepcopy(src.screen_top)
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Cursor1 = deepcopy(src.cursor)
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Selection1 = deepcopy(src.selection)
|
|
patch(Lines, event.before, event.after)
|
|
Text.redraw_all() -- if we're scrolling, reclaim all fragments to avoid memory leaks
|
|
schedule_save()
|
|
end
|
|
-- clipboard
|
|
elseif chord == 'C-c' then
|
|
for _,line in ipairs(Lines) do line.y = nil end -- just in case we scroll
|
|
local s = Text.selection()
|
|
if s then
|
|
App.setClipboardText(s)
|
|
end
|
|
elseif chord == 'C-x' then
|
|
for _,line in ipairs(Lines) do line.y = nil end -- just in case we scroll
|
|
local s = Text.cut_selection()
|
|
if s then
|
|
App.setClipboardText(s)
|
|
end
|
|
schedule_save()
|
|
elseif chord == 'C-v' then
|
|
for _,line in ipairs(Lines) do line.y = nil end -- just in case we scroll
|
|
-- We don't have a good sense of when to scroll, so we'll be conservative
|
|
-- and sometimes scroll when we didn't quite need to.
|
|
local before_line = Cursor1.line
|
|
local before = snapshot(before_line)
|
|
local clipboard_data = App.getClipboardText()
|
|
for _,code in utf8.codes(clipboard_data) do
|
|
local c = utf8.char(code)
|
|
if c == '\n' then
|
|
Text.insert_return()
|
|
else
|
|
Text.insert_at_cursor(c)
|
|
end
|
|
end
|
|
if Text.cursor_past_screen_bottom() then
|
|
Text.snap_cursor_to_bottom_of_screen()
|
|
end
|
|
schedule_save()
|
|
record_undo_event({before=before, after=snapshot(before_line, Cursor1.line)})
|
|
-- dispatch to drawing or text
|
|
elseif App.mouse_down(1) or chord:sub(1,2) == 'C-' then
|
|
-- DON'T reset line.y here
|
|
local drawing_index, drawing = Drawing.current_drawing()
|
|
if drawing_index then
|
|
local before = snapshot(drawing_index)
|
|
Drawing.keychord_pressed(chord)
|
|
record_undo_event({before=before, after=snapshot(drawing_index)})
|
|
schedule_save()
|
|
end
|
|
elseif chord == 'escape' and not App.mouse_down(1) then
|
|
for _,line in ipairs(Lines) do
|
|
if line.mode == 'drawing' then
|
|
line.show_help = false
|
|
end
|
|
end
|
|
elseif Current_drawing_mode == 'name' then
|
|
if chord == 'return' then
|
|
Current_drawing_mode = Previous_drawing_mode
|
|
Previous_drawing_mode = nil
|
|
else
|
|
local before = snapshot(Lines.current_drawing_index)
|
|
local drawing = Lines.current_drawing
|
|
local p = drawing.points[drawing.pending.target_point]
|
|
if chord == 'escape' then
|
|
p.name = nil
|
|
record_undo_event({before=before, after=snapshot(Lines.current_drawing_index)})
|
|
elseif chord == 'backspace' then
|
|
local len = utf8.len(p.name)
|
|
local byte_offset = Text.offset(p.name, len-1)
|
|
if len == 1 then byte_offset = 0 end
|
|
p.name = string.sub(p.name, 1, byte_offset)
|
|
record_undo_event({before=before, after=snapshot(Lines.current_drawing_index)})
|
|
end
|
|
end
|
|
schedule_save()
|
|
else
|
|
for _,line in ipairs(Lines) do line.y = nil end -- just in case we scroll
|
|
Text.keychord_pressed(chord)
|
|
end
|
|
end
|
|
|
|
function App.keyreleased(key, scancode)
|
|
end
|