diff options
Diffstat (limited to 'text.lua')
| -rw-r--r-- | text.lua | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/text.lua b/text.lua index a9cfcbd..d46edca 100644 --- a/text.lua +++ b/text.lua @@ -1,6 +1,8 @@ -- primitives for editing text Text = {} +local utf8 = require 'utf8' + function Text.draw(line, line_index, cursor_line, y, cursor_pos) love.graphics.setColor(0,0,0) local love_text = love.graphics.newText(love.graphics.getFont(), line.data) @@ -11,6 +13,136 @@ function Text.draw(line, line_index, cursor_line, y, cursor_pos) end end +function love.textinput(t) + if love.mouse.isDown('1') then return end + if Lines[Cursor_line].mode == 'drawing' then return end + local byte_offset + if Cursor_pos > 1 then + byte_offset = utf8.offset(Lines[Cursor_line].data, Cursor_pos-1) + else + byte_offset = 0 + end + Lines[Cursor_line].data = string.sub(Lines[Cursor_line].data, 1, byte_offset)..t..string.sub(Lines[Cursor_line].data, byte_offset+1) + Cursor_pos = Cursor_pos+1 + save_to_disk(Lines, Filename) +end + +-- Don't handle any keys here that would trigger love.textinput above. +function Text.keychord_pressed(chord) + if chord == 'return' then + local byte_offset = utf8.offset(Lines[Cursor_line].data, Cursor_pos) + table.insert(Lines, Cursor_line+1, {mode='text', data=string.sub(Lines[Cursor_line].data, byte_offset)}) + Lines[Cursor_line].data = string.sub(Lines[Cursor_line].data, 1, byte_offset-1) + Cursor_line = Cursor_line+1 + Cursor_pos = 1 + save_to_disk(Lines, Filename) + elseif chord == 'left' then + assert(Lines[Cursor_line].mode == 'text') + if Cursor_pos > 1 then + Cursor_pos = Cursor_pos-1 + else + local new_cursor_line = Cursor_line + while new_cursor_line > 1 do + new_cursor_line = new_cursor_line-1 + if Lines[new_cursor_line].mode == 'text' then + Cursor_line = new_cursor_line + Cursor_pos = #Lines[Cursor_line].data+1 + break + end + end + end + elseif chord == 'right' then + assert(Lines[Cursor_line].mode == 'text') + if Cursor_pos <= #Lines[Cursor_line].data then + Cursor_pos = Cursor_pos+1 + else + local new_cursor_line = Cursor_line + while new_cursor_line <= #Lines-1 do + new_cursor_line = new_cursor_line+1 + if Lines[new_cursor_line].mode == 'text' then + Cursor_line = new_cursor_line + Cursor_pos = 1 + break + end + end + end + elseif chord == 'home' then + Cursor_pos = 1 + elseif chord == 'end' then + Cursor_pos = #Lines[Cursor_line].data+1 + elseif chord == 'backspace' then + if Cursor_pos > 1 then + local byte_start = utf8.offset(Lines[Cursor_line].data, Cursor_pos-1) + local byte_end = utf8.offset(Lines[Cursor_line].data, Cursor_pos) + if byte_start then + if byte_end then + Lines[Cursor_line].data = string.sub(Lines[Cursor_line].data, 1, byte_start-1)..string.sub(Lines[Cursor_line].data, byte_end) + else + Lines[Cursor_line].data = string.sub(Lines[Cursor_line].data, 1, byte_start-1) + end + Cursor_pos = Cursor_pos-1 + end + elseif Cursor_line > 1 then + if Lines[Cursor_line-1].mode == 'drawing' then + table.remove(Lines, Cursor_line-1) + else + -- join lines + Cursor_pos = utf8.len(Lines[Cursor_line-1].data)+1 + Lines[Cursor_line-1].data = Lines[Cursor_line-1].data..Lines[Cursor_line].data + table.remove(Lines, Cursor_line) + end + Cursor_line = Cursor_line-1 + end + save_to_disk(Lines, Filename) + elseif chord == 'delete' then + if Cursor_pos <= #Lines[Cursor_line].data then + local byte_start = utf8.offset(Lines[Cursor_line].data, Cursor_pos) + local byte_end = utf8.offset(Lines[Cursor_line].data, Cursor_pos+1) + if byte_start then + if byte_end then + Lines[Cursor_line].data = string.sub(Lines[Cursor_line].data, 1, byte_start-1)..string.sub(Lines[Cursor_line].data, byte_end) + else + Lines[Cursor_line].data = string.sub(Lines[Cursor_line].data, 1, byte_start-1) + end + -- no change to Cursor_pos + end + elseif Cursor_line < #Lines then + if Lines[Cursor_line+1].mode == 'drawing' then + table.remove(Lines, Cursor_line+1) + else + -- join lines + Lines[Cursor_line].data = Lines[Cursor_line].data..Lines[Cursor_line+1].data + table.remove(Lines, Cursor_line+1) + end + end + save_to_disk(Lines, Filename) + elseif chord == 'up' then + assert(Lines[Cursor_line].mode == 'text') + local new_cursor_line = Cursor_line + while new_cursor_line > 1 do + new_cursor_line = new_cursor_line-1 + if Lines[new_cursor_line].mode == 'text' then + local old_x = Text.cursor_x(Lines[new_cursor_line].data, Cursor_pos) + Cursor_line = new_cursor_line + Cursor_pos = Text.nearest_cursor_pos(Lines[Cursor_line].data, old_x, Cursor_pos) + break + end + end + elseif chord == 'down' then + assert(Lines[Cursor_line].mode == 'text') + local new_cursor_line = Cursor_line + while new_cursor_line < #Lines do + new_cursor_line = new_cursor_line+1 + if Lines[new_cursor_line].mode == 'text' then + local old_x = Text.cursor_x(Lines[new_cursor_line].data, Cursor_pos) + Cursor_line = new_cursor_line + Cursor_pos = Text.nearest_cursor_pos(Lines[Cursor_line].data, old_x, Cursor_pos) + break + end + end + end +end + function Text.nearest_cursor_pos(line, x, hint) if x == 0 then return 1 |