first stab at equally hacky cursor down support
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ec5706e1ea
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33
text.lua
33
text.lua
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@ -26,6 +26,13 @@ function Text.draw(line, line_width, line_index)
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y = y + math.floor(15*Zoom)
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if New_render then print('y', y) end
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end
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if y > Screen_height then
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if line.screen_line_starting_pos then
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Bottom_screen_line_starting_pos = line.screen_line_starting_pos[#line.screen_line_starting_pos]
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else
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Bottom_screen_line_starting_pos = 1
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end
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end
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x = 25
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if line.screen_line_starting_pos == nil then
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line.screen_line_starting_pos = {1, pos}
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@ -273,18 +280,33 @@ function Text.keychord_pressed(chord)
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end
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elseif chord == 'down' then
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assert(Lines[Cursor_line].mode == 'text')
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-- next text line
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if Text.cursor_at_final_screen_line() then
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-- line is done, skip to next text line
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print('down: cursor at final screen line of its line')
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local new_cursor_line = Cursor_line
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while new_cursor_line < #Lines do
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new_cursor_line = new_cursor_line+1
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if Lines[new_cursor_line].mode == 'text' then
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Cursor_line = new_cursor_line
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Cursor_pos = Text.nearest_cursor_pos(Lines[Cursor_line].data, Cursor_x)
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print(Cursor_pos)
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break
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end
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end
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if Cursor_line > Screen_bottom_line then
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Screen_top_line = Cursor_line
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Text.scroll_up_while_cursor_on_screen()
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end
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else
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-- move down one screen line in current line
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print('cursor is NOT at final screen line of its line')
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local screen_line_index, screen_line_starting_pos = Text.pos_at_start_of_cursor_screen_line()
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new_screen_line_starting_pos = Lines[Cursor_line].screen_line_starting_pos[screen_line_index+1]
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print('switching pos of screen line at cursor from '..tostring(screen_line_starting_pos)..' to '..tostring(new_screen_line_starting_pos))
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local s = string.sub(Lines[Cursor_line].data, new_screen_line_starting_pos)
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Cursor_pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x) - 1
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print('cursor pos is now '..tostring(Cursor_pos))
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Text.scroll_up_while_cursor_on_screen()
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end
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end
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end
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@ -302,6 +324,15 @@ function Text.pos_at_start_of_cursor_screen_line()
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assert(false)
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end
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function Text.cursor_at_final_screen_line()
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if Lines[Cursor_line].screen_line_starting_pos == nil then
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return true
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end
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i=#Lines[Cursor_line].screen_line_starting_pos
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local spos = Lines[Cursor_line].screen_line_starting_pos[i]
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return spos <= Cursor_pos
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end
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function Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary()
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while Cursor_line <= #Lines do
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if Lines[Cursor_line].mode == 'text' then
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