2022-06-03 22:14:53 +01:00
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-- text editor, particularly text drawing, horizontal wrap, vertical scrolling
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2022-05-18 04:29:08 +01:00
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Text = {}
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2022-06-02 23:45:25 +01:00
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2022-10-30 00:43:13 +01:00
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require 'search'
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require 'select'
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require 'undo'
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require 'text_tests'
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2022-07-17 18:06:39 +01:00
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-- draw a line starting from startpos to screen at y between State.left and State.right
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2023-04-03 01:19:03 +01:00
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-- return y for the next line, and position of start of final screen line drawn
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2022-12-01 03:31:00 +00:00
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function Text.draw(State, line_index, y, startpos, fg, hide_cursor)
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2022-07-17 15:58:51 +01:00
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local line = State.lines[line_index]
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2022-07-21 00:34:09 +01:00
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local line_cache = State.line_cache[line_index]
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2022-07-18 05:05:01 +01:00
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line_cache.starty = y
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line_cache.startpos = startpos
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2022-05-20 01:29:14 +01:00
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-- wrap long lines
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2023-04-02 04:03:43 +01:00
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local final_screen_line_starting_pos = startpos -- track value to return
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2023-04-02 01:05:57 +01:00
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Text.populate_screen_line_starting_pos(State, line_index)
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2023-04-02 04:03:43 +01:00
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assert(#line_cache.screen_line_starting_pos >= 1)
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for i=1,#line_cache.screen_line_starting_pos do
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local pos = line_cache.screen_line_starting_pos[i]
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2022-08-15 23:45:02 +01:00
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if pos < startpos then
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2022-07-20 14:53:58 +01:00
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-- render nothing
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else
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2023-04-02 04:03:43 +01:00
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final_screen_line_starting_pos = pos
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2023-04-09 06:44:13 +01:00
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local screen_line = Text.screen_line(line, line_cache, i)
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--? print('text.draw:', screen_line, 'at', line_index,pos, 'after', x,y)
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local frag_len = utf8.len(screen_line)
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2023-07-31 16:56:20 +01:00
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-- render any highlights
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2022-07-13 00:08:24 +01:00
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if State.selection1.line then
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2022-07-13 04:59:24 +01:00
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local lo, hi = Text.clip_selection(State, line_index, pos, pos+frag_len)
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2023-04-02 04:03:43 +01:00
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Text.draw_highlight(State, line, State.left,y, pos, lo,hi)
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2022-05-29 16:12:47 +01:00
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end
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2022-07-20 14:53:58 +01:00
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if line_index == State.cursor1.line then
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2023-07-31 16:21:38 +01:00
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-- render search highlight or cursor
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2023-07-31 16:24:15 +01:00
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if State.search_term then
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2023-07-31 17:15:48 +01:00
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local data = State.lines[State.cursor1.line].data
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local cursor_offset = Text.offset(data, State.cursor1.pos)
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if data:sub(cursor_offset, cursor_offset+#State.search_term-1) == State.search_term then
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local save_selection = State.selection1
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State.selection1 = {line=line_index, pos=State.cursor1.pos+utf8.len(State.search_term)}
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local lo, hi = Text.clip_selection(State, line_index, pos, pos+frag_len)
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Text.draw_highlight(State, line, State.left,y, pos, lo,hi)
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State.selection1 = save_selection
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2023-07-31 16:24:15 +01:00
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end
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else
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2023-07-31 16:29:11 +01:00
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if pos <= State.cursor1.pos and pos + frag_len > State.cursor1.pos then
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2023-07-31 19:08:52 +01:00
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if hide_cursor then
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Text.pretend_draw_cursor(State, State.left+Text.x(screen_line, State.cursor1.pos-pos+1), y)
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else
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2023-07-31 22:20:53 +01:00
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Text.draw_cursor(State, State.left+Text.x(screen_line, State.cursor1.pos-pos+1), y, Cursor_color)
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2023-07-31 19:08:52 +01:00
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end
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2023-07-31 16:29:11 +01:00
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elseif pos + frag_len == State.cursor1.pos then
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-- Show cursor at end of line.
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-- This place also catches end of wrapping screen lines. That doesn't seem worth distinguishing.
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-- It seems useful to see a cursor whether your eye is on the left or right margin.
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2023-07-31 19:08:52 +01:00
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if hide_cursor then
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Text.pretend_draw_cursor(State, State.left+Text.x(screen_line, State.cursor1.pos-pos+1), y)
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else
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2023-07-31 22:20:53 +01:00
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Text.draw_cursor(State, State.left+Text.x(screen_line, State.cursor1.pos-pos+1), y, Cursor_color)
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2022-07-20 14:53:58 +01:00
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end
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2022-06-03 06:53:34 +01:00
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end
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end
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2022-05-20 01:29:14 +01:00
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end
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2023-07-31 16:56:20 +01:00
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-- render fragment
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2023-07-31 20:01:18 +01:00
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App.color(fg)
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2023-07-31 16:56:20 +01:00
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App.screen.print(screen_line, State.left,y)
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2023-04-02 04:03:43 +01:00
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y = y + State.line_height
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if y >= App.screen.height then
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break
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end
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2022-05-20 01:29:14 +01:00
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end
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end
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2023-04-03 01:19:03 +01:00
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return y, final_screen_line_starting_pos
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2023-04-02 04:03:43 +01:00
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end
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function Text.screen_line(line, line_cache, i)
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local pos = line_cache.screen_line_starting_pos[i]
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local offset = Text.offset(line.data, pos)
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if i >= #line_cache.screen_line_starting_pos then
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return line.data:sub(offset)
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2022-05-20 06:35:26 +01:00
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end
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2023-04-02 04:03:43 +01:00
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local endpos = line_cache.screen_line_starting_pos[i+1]-1
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local end_offset = Text.offset(line.data, endpos)
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return line.data:sub(offset, end_offset)
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2022-05-18 04:29:08 +01:00
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end
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2022-05-29 16:12:47 +01:00
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2023-07-31 22:20:53 +01:00
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function Text.draw_cursor(State, x, y, cursor_color)
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2022-06-09 21:45:52 +01:00
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-- blink every 0.5s
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if math.floor(Cursor_time*2)%2 == 0 then
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2022-12-01 03:31:00 +00:00
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App.color(cursor_color)
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2022-07-13 00:08:24 +01:00
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love.graphics.rectangle('fill', x,y, 3,State.line_height)
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2022-06-09 21:45:52 +01:00
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end
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2022-07-13 00:08:24 +01:00
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State.cursor_x = x
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State.cursor_y = y+State.line_height
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2022-05-20 13:40:42 +01:00
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end
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2023-06-08 06:16:25 +01:00
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function Text.pretend_draw_cursor(State, x, y)
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State.cursor_x = x
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State.cursor_y = y+State.line_height
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end
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2022-08-16 00:07:32 +01:00
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function Text.populate_screen_line_starting_pos(State, line_index)
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local line = State.lines[line_index]
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local line_cache = State.line_cache[line_index]
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if line_cache.screen_line_starting_pos then
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return
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end
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line_cache.screen_line_starting_pos = {1}
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2023-04-02 04:03:43 +01:00
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local x = 0
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2022-08-16 00:07:32 +01:00
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local pos = 1
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2022-05-20 06:58:04 +01:00
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-- try to wrap at word boundaries
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2022-08-15 18:31:56 +01:00
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for frag in line.data:gmatch('%S*%s*') do
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2023-04-02 00:29:17 +01:00
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local frag_width = App.width(frag)
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2023-04-02 04:03:43 +01:00
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--? print('-- frag:', frag, pos, x, frag_width, State.width)
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while x + frag_width > State.width do
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--? print('frag:', frag, pos, x, frag_width, State.width)
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if x < 0.8 * State.width then
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2022-07-20 15:02:45 +01:00
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-- long word; chop it at some letter
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-- We're not going to reimplement TeX here.
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2023-04-02 04:03:43 +01:00
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local bpos = Text.nearest_pos_less_than(frag, State.width - x)
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-- everything works if bpos == 0, but is a little inefficient
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pos = pos + bpos
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2022-07-20 15:02:45 +01:00
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local boffset = Text.offset(frag, bpos+1) -- byte _after_ bpos
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frag = string.sub(frag, boffset)
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2023-04-02 04:03:43 +01:00
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--? if bpos > 0 then
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--? print('after chop:', frag)
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--? end
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2023-04-02 00:29:17 +01:00
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frag_width = App.width(frag)
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2022-05-20 06:58:04 +01:00
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end
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2023-04-02 04:03:43 +01:00
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--? print('screen line:', pos)
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table.insert(line_cache.screen_line_starting_pos, pos)
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x = 0 -- new screen line
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2022-05-20 06:58:04 +01:00
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end
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2022-05-28 17:02:15 +01:00
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x = x + frag_width
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2023-04-02 04:03:43 +01:00
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pos = pos + utf8.len(frag)
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2022-05-20 06:58:04 +01:00
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end
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end
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2022-12-24 01:16:19 +00:00
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function Text.text_input(State, t)
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2022-06-14 17:05:02 +01:00
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if App.mouse_down(1) then return end
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2022-06-28 01:32:52 +01:00
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if App.ctrl_down() or App.alt_down() or App.cmd_down() then return end
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2022-07-13 00:55:32 +01:00
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local before = snapshot(State, State.cursor1.line)
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2022-07-13 00:33:26 +01:00
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--? print(State.screen_top1.line, State.screen_top1.pos, State.cursor1.line, State.cursor1.pos, State.screen_bottom1.line, State.screen_bottom1.pos)
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2022-07-13 00:39:42 +01:00
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Text.insert_at_cursor(State, t)
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2022-08-17 17:40:44 +01:00
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if State.cursor_y > App.screen.height - State.line_height then
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2022-07-17 17:10:33 +01:00
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Text.populate_screen_line_starting_pos(State, State.cursor1.line)
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2022-07-13 02:29:00 +01:00
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Text.snap_cursor_to_bottom_of_screen(State, State.left, State.right)
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2022-06-10 19:29:01 +01:00
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end
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2022-07-13 00:55:32 +01:00
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record_undo_event(State, {before=before, after=snapshot(State, State.cursor1.line)})
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2022-05-19 04:22:57 +01:00
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end
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2022-07-13 00:39:42 +01:00
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function Text.insert_at_cursor(State, t)
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2022-08-15 18:31:56 +01:00
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local byte_offset = Text.offset(State.lines[State.cursor1.line].data, State.cursor1.pos)
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State.lines[State.cursor1.line].data = string.sub(State.lines[State.cursor1.line].data, 1, byte_offset-1)..t..string.sub(State.lines[State.cursor1.line].data, byte_offset)
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2022-07-17 16:18:48 +01:00
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Text.clear_screen_line_cache(State, State.cursor1.line)
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2022-07-13 00:39:42 +01:00
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State.cursor1.pos = State.cursor1.pos+1
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2022-05-18 06:36:10 +01:00
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end
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2022-12-24 01:16:19 +00:00
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-- Don't handle any keys here that would trigger text_input above.
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2023-06-08 06:16:25 +01:00
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function Text.keychord_press(State, chord, readonly)
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2022-07-13 00:23:28 +01:00
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--? print('chord', chord, State.selection1.line, State.selection1.pos)
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2023-06-08 06:16:25 +01:00
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if not readonly then
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2022-05-29 06:27:47 +01:00
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--== shortcuts that mutate text
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2022-05-18 06:36:10 +01:00
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if chord == 'return' then
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2022-07-13 00:23:28 +01:00
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local before_line = State.cursor1.line
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2022-07-13 00:55:32 +01:00
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local before = snapshot(State, before_line)
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2022-07-13 00:39:42 +01:00
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Text.insert_return(State)
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2022-07-13 00:23:28 +01:00
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State.selection1 = {}
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2022-08-17 17:40:44 +01:00
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if State.cursor_y > App.screen.height - State.line_height then
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2022-07-13 02:29:00 +01:00
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Text.snap_cursor_to_bottom_of_screen(State, State.left, State.right)
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2022-06-10 19:21:41 +01:00
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end
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2022-07-13 00:30:41 +01:00
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schedule_save(State)
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2022-07-13 00:55:32 +01:00
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record_undo_event(State, {before=before, after=snapshot(State, before_line, State.cursor1.line)})
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2022-05-19 04:22:57 +01:00
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elseif chord == 'tab' then
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2022-07-13 00:55:32 +01:00
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local before = snapshot(State, State.cursor1.line)
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2022-07-13 00:23:28 +01:00
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--? print(State.screen_top1.line, State.screen_top1.pos, State.cursor1.line, State.cursor1.pos, State.screen_bottom1.line, State.screen_bottom1.pos)
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2022-07-13 00:39:42 +01:00
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Text.insert_at_cursor(State, '\t')
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2022-08-17 17:40:44 +01:00
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if State.cursor_y > App.screen.height - State.line_height then
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2022-07-17 17:10:33 +01:00
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Text.populate_screen_line_starting_pos(State, State.cursor1.line)
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2022-07-13 02:29:00 +01:00
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Text.snap_cursor_to_bottom_of_screen(State, State.left, State.right)
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2022-07-13 00:23:28 +01:00
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--? print('=>', State.screen_top1.line, State.screen_top1.pos, State.cursor1.line, State.cursor1.pos, State.screen_bottom1.line, State.screen_bottom1.pos)
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2022-06-10 19:29:01 +01:00
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end
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2022-07-13 00:30:41 +01:00
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schedule_save(State)
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2022-07-13 00:55:32 +01:00
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record_undo_event(State, {before=before, after=snapshot(State, State.cursor1.line)})
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2022-05-18 06:36:10 +01:00
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elseif chord == 'backspace' then
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2022-07-13 00:23:28 +01:00
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if State.selection1.line then
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2022-07-13 02:29:00 +01:00
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Text.delete_selection(State, State.left, State.right)
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2022-07-13 00:30:41 +01:00
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schedule_save(State)
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2022-05-29 16:12:47 +01:00
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return
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end
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2022-06-03 01:46:30 +01:00
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local before
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2022-07-13 00:23:28 +01:00
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if State.cursor1.pos > 1 then
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2022-07-13 00:55:32 +01:00
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before = snapshot(State, State.cursor1.line)
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2022-08-15 18:31:56 +01:00
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local byte_start = utf8.offset(State.lines[State.cursor1.line].data, State.cursor1.pos-1)
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local byte_end = utf8.offset(State.lines[State.cursor1.line].data, State.cursor1.pos)
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2022-05-18 06:36:10 +01:00
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if byte_start then
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if byte_end then
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2022-08-15 18:31:56 +01:00
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State.lines[State.cursor1.line].data = string.sub(State.lines[State.cursor1.line].data, 1, byte_start-1)..string.sub(State.lines[State.cursor1.line].data, byte_end)
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2022-05-18 06:36:10 +01:00
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else
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2022-08-15 18:31:56 +01:00
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State.lines[State.cursor1.line].data = string.sub(State.lines[State.cursor1.line].data, 1, byte_start-1)
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2022-05-18 06:36:10 +01:00
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end
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2022-07-13 00:23:28 +01:00
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State.cursor1.pos = State.cursor1.pos-1
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2022-05-18 06:36:10 +01:00
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end
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2022-07-13 00:23:28 +01:00
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elseif State.cursor1.line > 1 then
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2022-07-13 00:55:32 +01:00
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before = snapshot(State, State.cursor1.line-1, State.cursor1.line)
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2022-08-14 17:17:53 +01:00
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-- join lines
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2022-08-15 18:31:56 +01:00
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State.cursor1.pos = utf8.len(State.lines[State.cursor1.line-1].data)+1
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State.lines[State.cursor1.line-1].data = State.lines[State.cursor1.line-1].data..State.lines[State.cursor1.line].data
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2022-08-14 17:17:53 +01:00
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table.remove(State.lines, State.cursor1.line)
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table.remove(State.line_cache, State.cursor1.line)
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2022-07-13 00:23:28 +01:00
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State.cursor1.line = State.cursor1.line-1
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2022-05-18 06:36:10 +01:00
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end
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2022-08-11 06:38:10 +01:00
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if State.screen_top1.line > #State.lines then
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Text.populate_screen_line_starting_pos(State, #State.lines)
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local line_cache = State.line_cache[#State.line_cache]
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State.screen_top1 = {line=#State.lines, pos=line_cache.screen_line_starting_pos[#line_cache.screen_line_starting_pos]}
|
|
|
|
elseif Text.lt1(State.cursor1, State.screen_top1) then
|
2023-03-18 04:52:35 +00:00
|
|
|
State.screen_top1 = {
|
|
|
|
line=State.cursor1.line,
|
|
|
|
pos=Text.pos_at_start_of_screen_line(State, State.cursor1),
|
|
|
|
}
|
2022-07-13 01:24:01 +01:00
|
|
|
Text.redraw_all(State) -- if we're scrolling, reclaim all fragments to avoid memory leaks
|
2022-05-28 17:41:02 +01:00
|
|
|
end
|
2022-07-17 16:18:48 +01:00
|
|
|
Text.clear_screen_line_cache(State, State.cursor1.line)
|
2022-07-13 00:23:28 +01:00
|
|
|
assert(Text.le1(State.screen_top1, State.cursor1))
|
2022-07-13 00:30:41 +01:00
|
|
|
schedule_save(State)
|
2022-07-13 00:55:32 +01:00
|
|
|
record_undo_event(State, {before=before, after=snapshot(State, State.cursor1.line)})
|
2022-05-18 06:36:10 +01:00
|
|
|
elseif chord == 'delete' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line then
|
2022-07-13 02:29:00 +01:00
|
|
|
Text.delete_selection(State, State.left, State.right)
|
2022-07-13 00:30:41 +01:00
|
|
|
schedule_save(State)
|
2022-05-29 16:12:47 +01:00
|
|
|
return
|
|
|
|
end
|
2022-06-03 01:46:30 +01:00
|
|
|
local before
|
2022-08-15 18:31:56 +01:00
|
|
|
if State.cursor1.pos <= utf8.len(State.lines[State.cursor1.line].data) then
|
2022-07-13 00:55:32 +01:00
|
|
|
before = snapshot(State, State.cursor1.line)
|
2022-06-03 01:46:30 +01:00
|
|
|
else
|
2022-07-13 00:55:32 +01:00
|
|
|
before = snapshot(State, State.cursor1.line, State.cursor1.line+1)
|
2022-06-03 01:46:30 +01:00
|
|
|
end
|
2022-08-15 18:31:56 +01:00
|
|
|
if State.cursor1.pos <= utf8.len(State.lines[State.cursor1.line].data) then
|
|
|
|
local byte_start = utf8.offset(State.lines[State.cursor1.line].data, State.cursor1.pos)
|
|
|
|
local byte_end = utf8.offset(State.lines[State.cursor1.line].data, State.cursor1.pos+1)
|
2022-05-18 06:36:10 +01:00
|
|
|
if byte_start then
|
|
|
|
if byte_end then
|
2022-08-15 18:31:56 +01:00
|
|
|
State.lines[State.cursor1.line].data = string.sub(State.lines[State.cursor1.line].data, 1, byte_start-1)..string.sub(State.lines[State.cursor1.line].data, byte_end)
|
2022-05-18 06:36:10 +01:00
|
|
|
else
|
2022-08-15 18:31:56 +01:00
|
|
|
State.lines[State.cursor1.line].data = string.sub(State.lines[State.cursor1.line].data, 1, byte_start-1)
|
2022-05-18 06:36:10 +01:00
|
|
|
end
|
2022-07-13 00:23:28 +01:00
|
|
|
-- no change to State.cursor1.pos
|
2022-05-18 06:36:10 +01:00
|
|
|
end
|
2022-07-13 00:23:28 +01:00
|
|
|
elseif State.cursor1.line < #State.lines then
|
2022-08-14 17:17:53 +01:00
|
|
|
-- join lines
|
2022-08-15 18:31:56 +01:00
|
|
|
State.lines[State.cursor1.line].data = State.lines[State.cursor1.line].data..State.lines[State.cursor1.line+1].data
|
2022-07-18 05:05:01 +01:00
|
|
|
table.remove(State.lines, State.cursor1.line+1)
|
2022-07-21 00:34:09 +01:00
|
|
|
table.remove(State.line_cache, State.cursor1.line+1)
|
2022-05-18 06:36:10 +01:00
|
|
|
end
|
2022-07-17 16:18:48 +01:00
|
|
|
Text.clear_screen_line_cache(State, State.cursor1.line)
|
2022-07-13 00:30:41 +01:00
|
|
|
schedule_save(State)
|
2022-07-13 00:55:32 +01:00
|
|
|
record_undo_event(State, {before=before, after=snapshot(State, State.cursor1.line)})
|
2023-06-08 06:16:25 +01:00
|
|
|
end
|
|
|
|
end
|
2022-05-29 06:27:47 +01:00
|
|
|
--== shortcuts that move the cursor
|
2023-06-08 06:16:25 +01:00
|
|
|
if chord == 'left' then
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.left(State)
|
2022-07-13 00:23:28 +01:00
|
|
|
State.selection1 = {}
|
2022-06-20 19:35:27 +01:00
|
|
|
elseif chord == 'right' then
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.right(State)
|
2022-07-13 00:23:28 +01:00
|
|
|
State.selection1 = {}
|
2022-05-29 16:12:47 +01:00
|
|
|
elseif chord == 'S-left' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line == nil then
|
|
|
|
State.selection1 = {line=State.cursor1.line, pos=State.cursor1.pos}
|
2022-05-29 16:12:47 +01:00
|
|
|
end
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.left(State)
|
2022-05-29 16:12:47 +01:00
|
|
|
elseif chord == 'S-right' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line == nil then
|
|
|
|
State.selection1 = {line=State.cursor1.line, pos=State.cursor1.pos}
|
2022-05-29 16:12:47 +01:00
|
|
|
end
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.right(State)
|
2022-05-29 06:27:47 +01:00
|
|
|
-- C- hotkeys reserved for drawings, so we'll use M-
|
|
|
|
elseif chord == 'M-left' then
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.word_left(State)
|
2022-07-13 00:23:28 +01:00
|
|
|
State.selection1 = {}
|
2022-06-20 19:35:27 +01:00
|
|
|
elseif chord == 'M-right' then
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.word_right(State)
|
2022-07-13 00:23:28 +01:00
|
|
|
State.selection1 = {}
|
2022-05-29 16:12:47 +01:00
|
|
|
elseif chord == 'M-S-left' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line == nil then
|
|
|
|
State.selection1 = {line=State.cursor1.line, pos=State.cursor1.pos}
|
2022-05-29 16:12:47 +01:00
|
|
|
end
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.word_left(State)
|
2022-05-29 16:12:47 +01:00
|
|
|
elseif chord == 'M-S-right' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line == nil then
|
|
|
|
State.selection1 = {line=State.cursor1.line, pos=State.cursor1.pos}
|
2022-05-29 16:12:47 +01:00
|
|
|
end
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.word_right(State)
|
2022-05-29 06:27:47 +01:00
|
|
|
elseif chord == 'home' then
|
2022-07-13 00:39:42 +01:00
|
|
|
Text.start_of_line(State)
|
2022-07-13 00:23:28 +01:00
|
|
|
State.selection1 = {}
|
2022-06-20 19:35:27 +01:00
|
|
|
elseif chord == 'end' then
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.end_of_line(State)
|
2022-07-13 00:23:28 +01:00
|
|
|
State.selection1 = {}
|
2022-05-29 16:12:47 +01:00
|
|
|
elseif chord == 'S-home' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line == nil then
|
|
|
|
State.selection1 = {line=State.cursor1.line, pos=State.cursor1.pos}
|
2022-05-29 16:12:47 +01:00
|
|
|
end
|
2022-07-13 00:39:42 +01:00
|
|
|
Text.start_of_line(State)
|
2022-05-29 16:12:47 +01:00
|
|
|
elseif chord == 'S-end' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line == nil then
|
|
|
|
State.selection1 = {line=State.cursor1.line, pos=State.cursor1.pos}
|
2022-05-29 16:12:47 +01:00
|
|
|
end
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.end_of_line(State)
|
2022-05-18 06:36:10 +01:00
|
|
|
elseif chord == 'up' then
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.up(State)
|
2022-07-13 00:23:28 +01:00
|
|
|
State.selection1 = {}
|
2022-06-20 19:35:27 +01:00
|
|
|
elseif chord == 'down' then
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.down(State)
|
2022-07-13 00:23:28 +01:00
|
|
|
State.selection1 = {}
|
2022-05-29 16:12:47 +01:00
|
|
|
elseif chord == 'S-up' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line == nil then
|
|
|
|
State.selection1 = {line=State.cursor1.line, pos=State.cursor1.pos}
|
2022-05-29 16:12:47 +01:00
|
|
|
end
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.up(State)
|
2022-05-29 16:12:47 +01:00
|
|
|
elseif chord == 'S-down' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line == nil then
|
|
|
|
State.selection1 = {line=State.cursor1.line, pos=State.cursor1.pos}
|
2022-05-29 16:12:47 +01:00
|
|
|
end
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.down(State)
|
2022-05-29 06:42:11 +01:00
|
|
|
elseif chord == 'pageup' then
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.pageup(State)
|
2022-07-13 00:23:28 +01:00
|
|
|
State.selection1 = {}
|
2022-06-20 19:35:27 +01:00
|
|
|
elseif chord == 'pagedown' then
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.pagedown(State)
|
2022-07-13 00:23:28 +01:00
|
|
|
State.selection1 = {}
|
2022-05-29 16:12:47 +01:00
|
|
|
elseif chord == 'S-pageup' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line == nil then
|
|
|
|
State.selection1 = {line=State.cursor1.line, pos=State.cursor1.pos}
|
2022-05-29 16:12:47 +01:00
|
|
|
end
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.pageup(State)
|
2022-05-29 16:12:47 +01:00
|
|
|
elseif chord == 'S-pagedown' then
|
2022-07-13 00:23:28 +01:00
|
|
|
if State.selection1.line == nil then
|
|
|
|
State.selection1 = {line=State.cursor1.line, pos=State.cursor1.pos}
|
2022-05-29 16:12:47 +01:00
|
|
|
end
|
2022-08-18 20:09:50 +01:00
|
|
|
Text.pagedown(State)
|
2022-05-29 06:36:05 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-07-13 00:39:42 +01:00
|
|
|
function Text.insert_return(State)
|
2022-08-15 18:31:56 +01:00
|
|
|
local byte_offset = Text.offset(State.lines[State.cursor1.line].data, State.cursor1.pos)
|
|
|
|
table.insert(State.lines, State.cursor1.line+1, {data=string.sub(State.lines[State.cursor1.line].data, byte_offset)})
|
2022-07-21 00:34:09 +01:00
|
|
|
table.insert(State.line_cache, State.cursor1.line+1, {})
|
2022-08-15 18:31:56 +01:00
|
|
|
State.lines[State.cursor1.line].data = string.sub(State.lines[State.cursor1.line].data, 1, byte_offset-1)
|
2022-07-17 16:18:48 +01:00
|
|
|
Text.clear_screen_line_cache(State, State.cursor1.line)
|
2022-11-06 16:53:46 +00:00
|
|
|
State.cursor1 = {line=State.cursor1.line+1, pos=1}
|
2022-06-03 02:35:18 +01:00
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.pageup(State)
|
2022-06-10 22:52:49 +01:00
|
|
|
--? print('pageup')
|
2022-05-29 06:45:53 +01:00
|
|
|
-- duplicate some logic from love.draw
|
2022-07-13 04:59:24 +01:00
|
|
|
local top2 = Text.to2(State, State.screen_top1)
|
2022-05-29 06:45:53 +01:00
|
|
|
--? print(App.screen.height)
|
2022-07-13 00:39:42 +01:00
|
|
|
local y = App.screen.height - State.line_height
|
2022-07-13 02:29:00 +01:00
|
|
|
while y >= State.top do
|
2022-06-10 22:52:49 +01:00
|
|
|
--? print(y, top2.line, top2.screen_line, top2.screen_pos)
|
2022-07-13 00:39:42 +01:00
|
|
|
if State.screen_top1.line == 1 and State.screen_top1.pos == 1 then break end
|
2022-08-14 17:17:53 +01:00
|
|
|
y = y - State.line_height
|
2022-07-13 04:59:24 +01:00
|
|
|
top2 = Text.previous_screen_line(State, top2)
|
2022-05-29 06:45:53 +01:00
|
|
|
end
|
2022-07-13 01:24:01 +01:00
|
|
|
State.screen_top1 = Text.to1(State, top2)
|
2022-11-06 16:53:46 +00:00
|
|
|
State.cursor1 = {line=State.screen_top1.line, pos=State.screen_top1.pos}
|
2022-07-13 04:59:24 +01:00
|
|
|
Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary(State)
|
2022-07-13 00:39:42 +01:00
|
|
|
--? print(State.cursor1.line, State.cursor1.pos, State.screen_top1.line, State.screen_top1.pos)
|
2022-06-10 22:52:49 +01:00
|
|
|
--? print('pageup end')
|
2022-05-29 06:45:53 +01:00
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.pagedown(State)
|
2022-06-10 22:52:49 +01:00
|
|
|
--? print('pagedown')
|
2022-06-04 22:55:52 +01:00
|
|
|
-- If a line/paragraph gets to a page boundary, I often want to scroll
|
|
|
|
-- before I get to the bottom.
|
|
|
|
-- However, only do this if it makes forward progress.
|
2022-08-20 00:27:38 +01:00
|
|
|
local bot2 = Text.to2(State, State.screen_bottom1)
|
|
|
|
if bot2.screen_line > 1 then
|
|
|
|
bot2.screen_line = math.max(bot2.screen_line-10, 1)
|
2022-06-04 22:55:52 +01:00
|
|
|
end
|
2022-08-20 00:27:38 +01:00
|
|
|
local new_top1 = Text.to1(State, bot2)
|
2022-07-13 00:39:42 +01:00
|
|
|
if Text.lt1(State.screen_top1, new_top1) then
|
|
|
|
State.screen_top1 = new_top1
|
2022-06-04 22:55:52 +01:00
|
|
|
else
|
2022-11-06 16:53:46 +00:00
|
|
|
State.screen_top1 = {line=State.screen_bottom1.line, pos=State.screen_bottom1.pos}
|
2022-06-04 22:55:52 +01:00
|
|
|
end
|
2022-07-13 00:39:42 +01:00
|
|
|
--? print('setting top to', State.screen_top1.line, State.screen_top1.pos)
|
2022-11-06 16:53:46 +00:00
|
|
|
State.cursor1 = {line=State.screen_top1.line, pos=State.screen_top1.pos}
|
2022-07-13 04:59:24 +01:00
|
|
|
Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary(State)
|
2022-07-13 00:39:42 +01:00
|
|
|
--? print('top now', State.screen_top1.line)
|
2022-07-13 01:24:01 +01:00
|
|
|
Text.redraw_all(State) -- if we're scrolling, reclaim all fragments to avoid memory leaks
|
2022-06-10 22:52:49 +01:00
|
|
|
--? print('pagedown end')
|
2022-05-29 06:45:53 +01:00
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.up(State)
|
2022-07-13 00:39:42 +01:00
|
|
|
--? print('up', State.cursor1.line, State.cursor1.pos, State.screen_top1.line, State.screen_top1.pos)
|
2022-08-18 18:22:48 +01:00
|
|
|
local screen_line_starting_pos, screen_line_index = Text.pos_at_start_of_screen_line(State, State.cursor1)
|
2022-05-29 06:36:05 +01:00
|
|
|
if screen_line_starting_pos == 1 then
|
|
|
|
--? print('cursor is at first screen line of its line')
|
|
|
|
-- line is done; skip to previous text line
|
2022-08-14 17:17:53 +01:00
|
|
|
if State.cursor1.line > 1 then
|
|
|
|
local new_cursor_line = State.cursor1.line-1
|
|
|
|
--? print('found previous text line')
|
2023-02-01 06:47:48 +00:00
|
|
|
State.cursor1 = {line=new_cursor_line, pos=nil}
|
2022-08-14 17:17:53 +01:00
|
|
|
Text.populate_screen_line_starting_pos(State, State.cursor1.line)
|
|
|
|
-- previous text line found, pick its final screen line
|
|
|
|
--? print('has multiple screen lines')
|
|
|
|
local screen_line_starting_pos = State.line_cache[State.cursor1.line].screen_line_starting_pos
|
|
|
|
--? print(#screen_line_starting_pos)
|
|
|
|
screen_line_starting_pos = screen_line_starting_pos[#screen_line_starting_pos]
|
2022-08-15 18:31:56 +01:00
|
|
|
local screen_line_starting_byte_offset = Text.offset(State.lines[State.cursor1.line].data, screen_line_starting_pos)
|
|
|
|
local s = string.sub(State.lines[State.cursor1.line].data, screen_line_starting_byte_offset)
|
2022-08-14 17:17:53 +01:00
|
|
|
State.cursor1.pos = screen_line_starting_pos + Text.nearest_cursor_pos(s, State.cursor_x, State.left) - 1
|
2022-05-29 06:36:05 +01:00
|
|
|
end
|
|
|
|
else
|
|
|
|
-- move up one screen line in current line
|
|
|
|
assert(screen_line_index > 1)
|
2022-08-18 21:37:14 +01:00
|
|
|
local new_screen_line_starting_pos = State.line_cache[State.cursor1.line].screen_line_starting_pos[screen_line_index-1]
|
2022-08-15 18:31:56 +01:00
|
|
|
local new_screen_line_starting_byte_offset = Text.offset(State.lines[State.cursor1.line].data, new_screen_line_starting_pos)
|
|
|
|
local s = string.sub(State.lines[State.cursor1.line].data, new_screen_line_starting_byte_offset)
|
2022-07-13 04:59:24 +01:00
|
|
|
State.cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, State.cursor_x, State.left) - 1
|
2022-07-13 00:39:42 +01:00
|
|
|
--? print('cursor pos is now '..tostring(State.cursor1.pos))
|
2022-05-29 06:36:05 +01:00
|
|
|
end
|
2022-08-18 21:04:04 +01:00
|
|
|
if Text.lt1(State.cursor1, State.screen_top1) then
|
2023-03-18 04:52:35 +00:00
|
|
|
State.screen_top1 = {
|
|
|
|
line=State.cursor1.line,
|
|
|
|
pos=Text.pos_at_start_of_screen_line(State, State.cursor1),
|
|
|
|
}
|
|
|
|
Text.redraw_all(State) -- if we're scrolling, reclaim all fragments to avoid memory leaks
|
2022-08-18 21:04:04 +01:00
|
|
|
end
|
2022-05-29 06:36:05 +01:00
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.down(State)
|
2022-07-13 00:39:42 +01:00
|
|
|
--? print('down', State.cursor1.line, State.cursor1.pos, State.screen_top1.line, State.screen_top1.pos, State.screen_bottom1.line, State.screen_bottom1.pos)
|
2023-05-15 01:23:08 +01:00
|
|
|
assert(State.cursor1.pos)
|
2022-07-13 04:59:24 +01:00
|
|
|
if Text.cursor_at_final_screen_line(State) then
|
2022-05-29 06:36:05 +01:00
|
|
|
-- line is done, skip to next text line
|
|
|
|
--? print('cursor at final screen line of its line')
|
2022-08-14 17:17:53 +01:00
|
|
|
if State.cursor1.line < #State.lines then
|
|
|
|
local new_cursor_line = State.cursor1.line+1
|
|
|
|
State.cursor1.line = new_cursor_line
|
2022-08-15 18:31:56 +01:00
|
|
|
State.cursor1.pos = Text.nearest_cursor_pos(State.lines[State.cursor1.line].data, State.cursor_x, State.left)
|
2022-08-14 17:17:53 +01:00
|
|
|
--? print(State.cursor1.pos)
|
2022-05-19 01:22:04 +01:00
|
|
|
end
|
2022-07-13 00:39:42 +01:00
|
|
|
if State.cursor1.line > State.screen_bottom1.line then
|
|
|
|
--? print('screen top before:', State.screen_top1.line, State.screen_top1.pos)
|
2022-05-29 06:36:05 +01:00
|
|
|
--? print('scroll up preserving cursor')
|
2022-07-13 04:59:24 +01:00
|
|
|
Text.snap_cursor_to_bottom_of_screen(State)
|
2022-07-13 00:39:42 +01:00
|
|
|
--? print('screen top after:', State.screen_top1.line, State.screen_top1.pos)
|
2022-05-29 06:36:05 +01:00
|
|
|
end
|
|
|
|
else
|
|
|
|
-- move down one screen line in current line
|
2022-08-18 08:19:07 +01:00
|
|
|
local scroll_down = Text.le1(State.screen_bottom1, State.cursor1)
|
2022-05-29 06:36:05 +01:00
|
|
|
--? print('cursor is NOT at final screen line of its line')
|
2022-08-18 18:22:48 +01:00
|
|
|
local screen_line_starting_pos, screen_line_index = Text.pos_at_start_of_screen_line(State, State.cursor1)
|
2022-11-06 16:53:46 +00:00
|
|
|
Text.populate_screen_line_starting_pos(State, State.cursor1.line)
|
2022-08-18 21:37:14 +01:00
|
|
|
local new_screen_line_starting_pos = State.line_cache[State.cursor1.line].screen_line_starting_pos[screen_line_index+1]
|
2022-05-29 06:36:05 +01:00
|
|
|
--? print('switching pos of screen line at cursor from '..tostring(screen_line_starting_pos)..' to '..tostring(new_screen_line_starting_pos))
|
2022-08-15 18:31:56 +01:00
|
|
|
local new_screen_line_starting_byte_offset = Text.offset(State.lines[State.cursor1.line].data, new_screen_line_starting_pos)
|
|
|
|
local s = string.sub(State.lines[State.cursor1.line].data, new_screen_line_starting_byte_offset)
|
2022-07-13 04:59:24 +01:00
|
|
|
State.cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, State.cursor_x, State.left) - 1
|
2022-07-13 00:39:42 +01:00
|
|
|
--? print('cursor pos is now', State.cursor1.line, State.cursor1.pos)
|
2022-06-05 15:59:44 +01:00
|
|
|
if scroll_down then
|
2022-05-29 06:36:05 +01:00
|
|
|
--? print('scroll up preserving cursor')
|
2022-07-13 04:59:24 +01:00
|
|
|
Text.snap_cursor_to_bottom_of_screen(State)
|
2022-07-13 00:39:42 +01:00
|
|
|
--? print('screen top after:', State.screen_top1.line, State.screen_top1.pos)
|
2022-05-29 06:36:05 +01:00
|
|
|
end
|
|
|
|
end
|
2022-07-13 00:39:42 +01:00
|
|
|
--? print('=>', State.cursor1.line, State.cursor1.pos, State.screen_top1.line, State.screen_top1.pos, State.screen_bottom1.line, State.screen_bottom1.pos)
|
2022-05-29 06:36:05 +01:00
|
|
|
end
|
|
|
|
|
2022-07-13 00:39:42 +01:00
|
|
|
function Text.start_of_line(State)
|
|
|
|
State.cursor1.pos = 1
|
|
|
|
if Text.lt1(State.cursor1, State.screen_top1) then
|
|
|
|
State.screen_top1 = {line=State.cursor1.line, pos=State.cursor1.pos} -- copy
|
2022-06-29 02:48:59 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.end_of_line(State)
|
2022-08-15 18:31:56 +01:00
|
|
|
State.cursor1.pos = utf8.len(State.lines[State.cursor1.line].data) + 1
|
2022-08-17 17:36:17 +01:00
|
|
|
if Text.cursor_out_of_screen(State) then
|
2022-07-13 04:59:24 +01:00
|
|
|
Text.snap_cursor_to_bottom_of_screen(State)
|
2022-06-29 02:48:59 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.word_left(State)
|
2022-07-12 03:18:54 +01:00
|
|
|
-- skip some whitespace
|
2022-05-29 06:36:05 +01:00
|
|
|
while true do
|
2022-07-13 00:39:42 +01:00
|
|
|
if State.cursor1.pos == 1 then
|
2022-07-12 03:18:54 +01:00
|
|
|
break
|
|
|
|
end
|
2022-08-15 18:31:56 +01:00
|
|
|
if Text.match(State.lines[State.cursor1.line].data, State.cursor1.pos-1, '%S') then
|
2022-07-12 03:18:54 +01:00
|
|
|
break
|
|
|
|
end
|
2022-07-13 04:59:24 +01:00
|
|
|
Text.left(State)
|
2022-07-12 03:18:54 +01:00
|
|
|
end
|
|
|
|
-- skip some non-whitespace
|
|
|
|
while true do
|
2022-07-13 04:59:24 +01:00
|
|
|
Text.left(State)
|
2022-07-13 00:39:42 +01:00
|
|
|
if State.cursor1.pos == 1 then
|
2022-07-12 03:18:54 +01:00
|
|
|
break
|
|
|
|
end
|
2022-07-13 00:39:42 +01:00
|
|
|
assert(State.cursor1.pos > 1)
|
2022-08-15 18:31:56 +01:00
|
|
|
if Text.match(State.lines[State.cursor1.line].data, State.cursor1.pos-1, '%s') then
|
2022-05-29 06:36:05 +01:00
|
|
|
break
|
|
|
|
end
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.word_right(State)
|
2022-07-12 03:18:54 +01:00
|
|
|
-- skip some whitespace
|
2022-05-29 06:36:05 +01:00
|
|
|
while true do
|
2022-08-15 18:31:56 +01:00
|
|
|
if State.cursor1.pos > utf8.len(State.lines[State.cursor1.line].data) then
|
2022-07-12 03:18:54 +01:00
|
|
|
break
|
|
|
|
end
|
2022-08-15 18:31:56 +01:00
|
|
|
if Text.match(State.lines[State.cursor1.line].data, State.cursor1.pos, '%S') then
|
2022-07-12 03:18:54 +01:00
|
|
|
break
|
|
|
|
end
|
2022-07-13 01:10:11 +01:00
|
|
|
Text.right_without_scroll(State)
|
2022-07-12 03:18:54 +01:00
|
|
|
end
|
|
|
|
while true do
|
2022-07-13 01:10:11 +01:00
|
|
|
Text.right_without_scroll(State)
|
2022-08-15 18:31:56 +01:00
|
|
|
if State.cursor1.pos > utf8.len(State.lines[State.cursor1.line].data) then
|
2022-07-12 03:18:54 +01:00
|
|
|
break
|
|
|
|
end
|
2022-08-15 18:31:56 +01:00
|
|
|
if Text.match(State.lines[State.cursor1.line].data, State.cursor1.pos, '%s') then
|
2022-05-29 06:36:05 +01:00
|
|
|
break
|
|
|
|
end
|
2022-05-18 06:36:10 +01:00
|
|
|
end
|
2022-08-17 17:36:17 +01:00
|
|
|
if Text.cursor_out_of_screen(State) then
|
2022-07-13 04:59:24 +01:00
|
|
|
Text.snap_cursor_to_bottom_of_screen(State)
|
2022-07-05 19:27:41 +01:00
|
|
|
end
|
2022-05-18 06:36:10 +01:00
|
|
|
end
|
|
|
|
|
2022-07-12 02:56:19 +01:00
|
|
|
function Text.match(s, pos, pat)
|
|
|
|
local start_offset = Text.offset(s, pos)
|
|
|
|
assert(start_offset)
|
|
|
|
local end_offset = Text.offset(s, pos+1)
|
|
|
|
assert(end_offset > start_offset)
|
|
|
|
local curr = s:sub(start_offset, end_offset-1)
|
|
|
|
return curr:match(pat)
|
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.left(State)
|
2022-07-13 01:10:11 +01:00
|
|
|
if State.cursor1.pos > 1 then
|
|
|
|
State.cursor1.pos = State.cursor1.pos-1
|
2022-08-14 17:17:53 +01:00
|
|
|
elseif State.cursor1.line > 1 then
|
|
|
|
State.cursor1.line = State.cursor1.line-1
|
2022-08-15 18:31:56 +01:00
|
|
|
State.cursor1.pos = utf8.len(State.lines[State.cursor1.line].data) + 1
|
2022-06-29 02:48:59 +01:00
|
|
|
end
|
2022-07-13 01:10:11 +01:00
|
|
|
if Text.lt1(State.cursor1, State.screen_top1) then
|
2023-03-18 04:52:35 +00:00
|
|
|
State.screen_top1 = {
|
|
|
|
line=State.cursor1.line,
|
|
|
|
pos=Text.pos_at_start_of_screen_line(State, State.cursor1),
|
|
|
|
}
|
|
|
|
Text.redraw_all(State) -- if we're scrolling, reclaim all fragments to avoid memory leaks
|
2022-05-25 23:25:10 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.right(State)
|
2022-07-13 01:10:11 +01:00
|
|
|
Text.right_without_scroll(State)
|
2022-08-17 17:36:17 +01:00
|
|
|
if Text.cursor_out_of_screen(State) then
|
2022-07-13 04:59:24 +01:00
|
|
|
Text.snap_cursor_to_bottom_of_screen(State)
|
2022-07-05 19:27:41 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-07-13 01:10:11 +01:00
|
|
|
function Text.right_without_scroll(State)
|
2022-08-15 18:31:56 +01:00
|
|
|
if State.cursor1.pos <= utf8.len(State.lines[State.cursor1.line].data) then
|
2022-07-13 01:10:11 +01:00
|
|
|
State.cursor1.pos = State.cursor1.pos+1
|
2022-08-14 17:17:53 +01:00
|
|
|
elseif State.cursor1.line <= #State.lines-1 then
|
|
|
|
State.cursor1.line = State.cursor1.line+1
|
|
|
|
State.cursor1.pos = 1
|
2022-06-29 02:48:59 +01:00
|
|
|
end
|
2022-05-25 23:25:10 +01:00
|
|
|
end
|
|
|
|
|
2023-06-04 20:20:24 +01:00
|
|
|
-- result: pos, index of screen line
|
2022-08-18 18:22:48 +01:00
|
|
|
function Text.pos_at_start_of_screen_line(State, loc1)
|
|
|
|
Text.populate_screen_line_starting_pos(State, loc1.line)
|
|
|
|
local line_cache = State.line_cache[loc1.line]
|
|
|
|
for i=#line_cache.screen_line_starting_pos,1,-1 do
|
|
|
|
local spos = line_cache.screen_line_starting_pos[i]
|
|
|
|
if spos <= loc1.pos then
|
2022-08-17 17:10:52 +01:00
|
|
|
return spos,i
|
2022-05-21 00:41:21 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
assert(false)
|
|
|
|
end
|
|
|
|
|
2023-06-04 20:20:24 +01:00
|
|
|
function Text.pos_at_end_of_screen_line(State, loc1)
|
|
|
|
Text.populate_screen_line_starting_pos(State, loc1.line)
|
|
|
|
local line_cache = State.line_cache[loc1.line]
|
|
|
|
local most_recent_final_pos = utf8.len(State.lines[loc1.line].data)+1
|
|
|
|
for i=#line_cache.screen_line_starting_pos,1,-1 do
|
|
|
|
local spos = line_cache.screen_line_starting_pos[i]
|
|
|
|
if spos <= loc1.pos then
|
|
|
|
return most_recent_final_pos
|
|
|
|
end
|
|
|
|
most_recent_final_pos = spos-1
|
|
|
|
end
|
|
|
|
assert(false)
|
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.cursor_at_final_screen_line(State)
|
2022-07-17 17:10:33 +01:00
|
|
|
Text.populate_screen_line_starting_pos(State, State.cursor1.line)
|
2022-07-21 00:34:09 +01:00
|
|
|
local screen_lines = State.line_cache[State.cursor1.line].screen_line_starting_pos
|
2022-07-13 01:24:01 +01:00
|
|
|
--? print(screen_lines[#screen_lines], State.cursor1.pos)
|
|
|
|
return screen_lines[#screen_lines] <= State.cursor1.pos
|
2022-05-21 04:33:30 +01:00
|
|
|
end
|
|
|
|
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary(State)
|
2022-08-14 17:17:53 +01:00
|
|
|
if State.top > App.screen.height - State.line_height then
|
2022-05-23 23:38:42 +01:00
|
|
|
--? print('scroll up')
|
2022-07-13 04:59:24 +01:00
|
|
|
Text.snap_cursor_to_bottom_of_screen(State)
|
2022-05-19 02:19:27 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-07-13 01:24:01 +01:00
|
|
|
-- should never modify State.cursor1
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.snap_cursor_to_bottom_of_screen(State)
|
2022-11-06 16:53:46 +00:00
|
|
|
--? print('to2:', State.cursor1.line, State.cursor1.pos)
|
2022-07-13 04:59:24 +01:00
|
|
|
local top2 = Text.to2(State, State.cursor1)
|
2022-11-06 16:53:46 +00:00
|
|
|
--? print('to2: =>', top2.line, top2.screen_line, top2.screen_pos)
|
|
|
|
-- slide to start of screen line
|
2022-06-05 17:50:19 +01:00
|
|
|
top2.screen_pos = 1 -- start of screen line
|
2023-03-18 05:17:23 +00:00
|
|
|
--? print('snap', State.screen_top1.line, State.screen_top1.pos, State.cursor1.line, State.cursor1.pos, State.screen_bottom1.line, State.screen_bottom1.pos)
|
2022-07-13 01:24:01 +01:00
|
|
|
--? print('cursor pos '..tostring(State.cursor1.pos)..' is on the #'..tostring(top2.screen_line)..' screen line down')
|
|
|
|
local y = App.screen.height - State.line_height
|
2022-05-21 06:43:09 +01:00
|
|
|
-- duplicate some logic from love.draw
|
2022-05-19 02:19:27 +01:00
|
|
|
while true do
|
2022-05-22 07:02:04 +01:00
|
|
|
--? print(y, 'top2:', top2.line, top2.screen_line, top2.screen_pos)
|
|
|
|
if top2.line == 1 and top2.screen_line == 1 then break end
|
2022-08-14 17:17:53 +01:00
|
|
|
local h = State.line_height
|
|
|
|
if y - h < State.top then
|
|
|
|
break
|
2022-05-19 02:19:27 +01:00
|
|
|
end
|
2022-08-14 17:17:53 +01:00
|
|
|
y = y - h
|
2022-07-13 04:59:24 +01:00
|
|
|
top2 = Text.previous_screen_line(State, top2)
|
2022-05-19 02:19:27 +01:00
|
|
|
end
|
2022-05-22 07:02:04 +01:00
|
|
|
--? print('top2 finally:', top2.line, top2.screen_line, top2.screen_pos)
|
2022-07-13 01:24:01 +01:00
|
|
|
State.screen_top1 = Text.to1(State, top2)
|
|
|
|
--? print('top1 finally:', State.screen_top1.line, State.screen_top1.pos)
|
2022-11-06 16:53:46 +00:00
|
|
|
--? print('snap =>', State.screen_top1.line, State.screen_top1.pos, State.cursor1.line, State.cursor1.pos, State.screen_bottom1.line, State.screen_bottom1.pos)
|
2022-07-13 01:24:01 +01:00
|
|
|
Text.redraw_all(State) -- if we're scrolling, reclaim all fragments to avoid memory leaks
|
2022-05-19 02:19:27 +01:00
|
|
|
end
|
|
|
|
|
2022-07-17 17:05:50 +01:00
|
|
|
function Text.in_line(State, line_index, x,y)
|
|
|
|
local line = State.lines[line_index]
|
2022-07-21 00:34:09 +01:00
|
|
|
local line_cache = State.line_cache[line_index]
|
2022-07-18 05:05:01 +01:00
|
|
|
if line_cache.starty == nil then return false end -- outside current page
|
|
|
|
if y < line_cache.starty then return false end
|
2022-07-17 17:10:33 +01:00
|
|
|
Text.populate_screen_line_starting_pos(State, line_index)
|
2022-07-18 05:05:01 +01:00
|
|
|
return y < line_cache.starty + State.line_height*(#line_cache.screen_line_starting_pos - Text.screen_line_index(line_cache.screen_line_starting_pos, line_cache.startpos) + 1)
|
2022-05-18 06:53:09 +01:00
|
|
|
end
|
|
|
|
|
2022-06-03 21:22:03 +01:00
|
|
|
-- convert mx,my in pixels to schema-1 coordinates
|
2022-07-17 17:19:53 +01:00
|
|
|
function Text.to_pos_on_line(State, line_index, mx, my)
|
|
|
|
local line = State.lines[line_index]
|
2022-07-21 00:34:09 +01:00
|
|
|
local line_cache = State.line_cache[line_index]
|
2022-07-18 05:05:01 +01:00
|
|
|
assert(my >= line_cache.starty)
|
2022-05-20 06:07:12 +01:00
|
|
|
-- duplicate some logic from Text.draw
|
2022-07-18 05:05:01 +01:00
|
|
|
local y = line_cache.starty
|
|
|
|
local start_screen_line_index = Text.screen_line_index(line_cache.screen_line_starting_pos, line_cache.startpos)
|
|
|
|
for screen_line_index = start_screen_line_index,#line_cache.screen_line_starting_pos do
|
|
|
|
local screen_line_starting_pos = line_cache.screen_line_starting_pos[screen_line_index]
|
2022-08-15 18:31:56 +01:00
|
|
|
local screen_line_starting_byte_offset = Text.offset(line.data, screen_line_starting_pos)
|
|
|
|
--? print('iter', y, screen_line_index, screen_line_starting_pos, string.sub(line.data, screen_line_starting_byte_offset))
|
2022-07-13 01:24:01 +01:00
|
|
|
local nexty = y + State.line_height
|
2022-05-20 06:07:12 +01:00
|
|
|
if my < nexty then
|
2022-05-20 06:26:15 +01:00
|
|
|
-- On all wrapped screen lines but the final one, clicks past end of
|
|
|
|
-- line position cursor on final character of screen line.
|
|
|
|
-- (The final screen line positions past end of screen line as always.)
|
2022-07-18 06:15:49 +01:00
|
|
|
if screen_line_index < #line_cache.screen_line_starting_pos and mx > State.left + Text.screen_line_width(State, line_index, screen_line_index) then
|
2022-06-14 01:23:21 +01:00
|
|
|
--? print('past end of non-final line; return')
|
2022-07-18 05:05:01 +01:00
|
|
|
return line_cache.screen_line_starting_pos[screen_line_index+1]-1
|
2022-05-20 06:26:15 +01:00
|
|
|
end
|
2022-08-15 18:31:56 +01:00
|
|
|
local s = string.sub(line.data, screen_line_starting_byte_offset)
|
2022-07-13 04:59:24 +01:00
|
|
|
--? print('return', mx, Text.nearest_cursor_pos(s, mx, State.left), '=>', screen_line_starting_pos + Text.nearest_cursor_pos(s, mx, State.left) - 1)
|
|
|
|
return screen_line_starting_pos + Text.nearest_cursor_pos(s, mx, State.left) - 1
|
2022-05-20 06:07:12 +01:00
|
|
|
end
|
|
|
|
y = nexty
|
|
|
|
end
|
|
|
|
assert(false)
|
2022-05-18 06:53:09 +01:00
|
|
|
end
|
|
|
|
|
2022-07-17 17:37:50 +01:00
|
|
|
function Text.screen_line_width(State, line_index, i)
|
|
|
|
local line = State.lines[line_index]
|
2022-07-21 00:34:09 +01:00
|
|
|
local line_cache = State.line_cache[line_index]
|
2022-07-18 05:05:01 +01:00
|
|
|
local start_pos = line_cache.screen_line_starting_pos[i]
|
2022-08-15 18:31:56 +01:00
|
|
|
local start_offset = Text.offset(line.data, start_pos)
|
2022-06-29 17:30:23 +01:00
|
|
|
local screen_line
|
2022-07-18 05:05:01 +01:00
|
|
|
if i < #line_cache.screen_line_starting_pos then
|
|
|
|
local past_end_pos = line_cache.screen_line_starting_pos[i+1]
|
2022-08-15 18:31:56 +01:00
|
|
|
local past_end_offset = Text.offset(line.data, past_end_pos)
|
|
|
|
screen_line = string.sub(line.data, start_offset, past_end_offset-1)
|
2022-06-29 17:30:23 +01:00
|
|
|
else
|
2022-08-15 18:31:56 +01:00
|
|
|
screen_line = string.sub(line.data, start_pos)
|
2022-06-29 17:30:23 +01:00
|
|
|
end
|
2023-04-02 00:29:17 +01:00
|
|
|
return App.width(screen_line)
|
2022-06-29 17:30:23 +01:00
|
|
|
end
|
|
|
|
|
2022-07-17 17:21:57 +01:00
|
|
|
function Text.screen_line_index(screen_line_starting_pos, pos)
|
|
|
|
for i = #screen_line_starting_pos,1,-1 do
|
|
|
|
if screen_line_starting_pos[i] <= pos then
|
2022-07-01 02:00:09 +01:00
|
|
|
return i
|
|
|
|
end
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-07-09 00:11:30 +01:00
|
|
|
-- convert x pixel coordinate to pos
|
|
|
|
-- oblivious to wrapping
|
2022-07-20 15:50:33 +01:00
|
|
|
-- result: 1 to len+1
|
2022-07-09 00:11:30 +01:00
|
|
|
function Text.nearest_cursor_pos(line, x, left)
|
2022-07-29 22:38:45 +01:00
|
|
|
if x < left then
|
2022-05-18 04:29:08 +01:00
|
|
|
return 1
|
|
|
|
end
|
2022-05-20 01:46:02 +01:00
|
|
|
local len = utf8.len(line)
|
2022-07-09 00:11:30 +01:00
|
|
|
local max_x = left+Text.x(line, len+1)
|
2022-05-18 04:29:08 +01:00
|
|
|
if x > max_x then
|
2022-05-20 01:46:02 +01:00
|
|
|
return len+1
|
2022-05-18 04:29:08 +01:00
|
|
|
end
|
2022-07-08 22:18:23 +01:00
|
|
|
local leftpos, rightpos = 1, len+1
|
2022-05-24 22:34:50 +01:00
|
|
|
--? print('-- nearest', x)
|
2022-05-20 05:52:38 +01:00
|
|
|
while true do
|
2022-07-08 22:18:23 +01:00
|
|
|
--? print('nearest', x, '^'..line..'$', leftpos, rightpos)
|
|
|
|
if leftpos == rightpos then
|
|
|
|
return leftpos
|
2022-05-24 22:34:50 +01:00
|
|
|
end
|
2022-07-08 22:18:23 +01:00
|
|
|
local curr = math.floor((leftpos+rightpos)/2)
|
2022-07-09 00:11:30 +01:00
|
|
|
local currxmin = left+Text.x(line, curr)
|
|
|
|
local currxmax = left+Text.x(line, curr+1)
|
2022-07-08 22:18:23 +01:00
|
|
|
--? print('nearest', x, leftpos, rightpos, curr, currxmin, currxmax)
|
2022-05-18 04:29:08 +01:00
|
|
|
if currxmin <= x and x < currxmax then
|
2022-05-25 23:08:37 +01:00
|
|
|
if x-currxmin < currxmax-x then
|
|
|
|
return curr
|
|
|
|
else
|
|
|
|
return curr+1
|
|
|
|
end
|
2022-05-18 04:29:08 +01:00
|
|
|
end
|
2022-07-08 22:18:23 +01:00
|
|
|
if leftpos >= rightpos-1 then
|
|
|
|
return rightpos
|
2022-05-20 05:52:38 +01:00
|
|
|
end
|
2022-05-18 04:29:08 +01:00
|
|
|
if currxmin > x then
|
2022-07-08 22:18:23 +01:00
|
|
|
rightpos = curr
|
2022-05-18 04:29:08 +01:00
|
|
|
else
|
2022-07-08 22:18:23 +01:00
|
|
|
leftpos = curr
|
2022-05-18 04:29:08 +01:00
|
|
|
end
|
|
|
|
end
|
2022-05-20 05:52:38 +01:00
|
|
|
assert(false)
|
2022-05-18 04:29:08 +01:00
|
|
|
end
|
|
|
|
|
2022-07-20 00:49:08 +01:00
|
|
|
-- return the nearest index of line (in utf8 code points) which lies entirely
|
|
|
|
-- within x pixels of the left margin
|
2022-07-20 15:50:33 +01:00
|
|
|
-- result: 0 to len+1
|
2022-07-20 00:49:08 +01:00
|
|
|
function Text.nearest_pos_less_than(line, x)
|
2022-07-20 15:00:39 +01:00
|
|
|
--? print('', '-- nearest_pos_less_than', line, x)
|
2022-05-23 23:22:16 +01:00
|
|
|
local len = utf8.len(line)
|
2022-07-20 17:11:29 +01:00
|
|
|
local max_x = Text.x_after(line, len)
|
2022-05-23 23:22:16 +01:00
|
|
|
if x > max_x then
|
|
|
|
return len+1
|
|
|
|
end
|
2022-07-20 15:08:28 +01:00
|
|
|
local left, right = 0, len+1
|
2022-05-23 23:22:16 +01:00
|
|
|
while true do
|
|
|
|
local curr = math.floor((left+right)/2)
|
2022-07-20 17:11:29 +01:00
|
|
|
local currxmin = Text.x_after(line, curr+1)
|
|
|
|
local currxmax = Text.x_after(line, curr+2)
|
2022-07-20 15:00:39 +01:00
|
|
|
--? print('', x, left, right, curr, currxmin, currxmax)
|
2022-05-23 23:22:16 +01:00
|
|
|
if currxmin <= x and x < currxmax then
|
|
|
|
return curr
|
|
|
|
end
|
|
|
|
if left >= right-1 then
|
|
|
|
return left
|
|
|
|
end
|
|
|
|
if currxmin > x then
|
|
|
|
right = curr
|
|
|
|
else
|
|
|
|
left = curr
|
|
|
|
end
|
|
|
|
end
|
|
|
|
assert(false)
|
|
|
|
end
|
|
|
|
|
2022-07-20 17:11:29 +01:00
|
|
|
function Text.x_after(s, pos)
|
2022-07-20 00:49:08 +01:00
|
|
|
local offset = Text.offset(s, math.min(pos+1, #s+1))
|
|
|
|
local s_before = s:sub(1, offset-1)
|
|
|
|
--? print('^'..s_before..'$')
|
2023-04-02 00:29:17 +01:00
|
|
|
return App.width(s_before)
|
2022-07-20 00:49:08 +01:00
|
|
|
end
|
|
|
|
|
2022-07-20 17:11:29 +01:00
|
|
|
function Text.x(s, pos)
|
|
|
|
local offset = Text.offset(s, pos)
|
|
|
|
local s_before = s:sub(1, offset-1)
|
2023-04-02 00:29:17 +01:00
|
|
|
return App.width(s_before)
|
2022-07-20 17:11:29 +01:00
|
|
|
end
|
|
|
|
|
2022-08-12 03:34:18 +01:00
|
|
|
function Text.to2(State, loc1)
|
2022-11-06 16:53:46 +00:00
|
|
|
local result = {line=loc1.line}
|
2022-08-18 17:51:43 +01:00
|
|
|
local line_cache = State.line_cache[loc1.line]
|
2022-08-12 03:34:18 +01:00
|
|
|
Text.populate_screen_line_starting_pos(State, loc1.line)
|
2022-08-18 17:51:43 +01:00
|
|
|
for i=#line_cache.screen_line_starting_pos,1,-1 do
|
|
|
|
local spos = line_cache.screen_line_starting_pos[i]
|
2022-08-12 03:34:18 +01:00
|
|
|
if spos <= loc1.pos then
|
2022-06-10 22:52:49 +01:00
|
|
|
result.screen_line = i
|
2022-08-12 03:34:18 +01:00
|
|
|
result.screen_pos = loc1.pos - spos + 1
|
2022-06-10 22:52:49 +01:00
|
|
|
break
|
2022-05-22 00:24:07 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
assert(result.screen_pos)
|
|
|
|
return result
|
|
|
|
end
|
|
|
|
|
2022-08-12 03:34:18 +01:00
|
|
|
function Text.to1(State, loc2)
|
|
|
|
local result = {line=loc2.line, pos=loc2.screen_pos}
|
|
|
|
if loc2.screen_line > 1 then
|
|
|
|
result.pos = State.line_cache[loc2.line].screen_line_starting_pos[loc2.screen_line] + loc2.screen_pos - 1
|
2022-05-22 00:24:07 +01:00
|
|
|
end
|
|
|
|
return result
|
|
|
|
end
|
|
|
|
|
2022-06-03 16:11:18 +01:00
|
|
|
function Text.eq1(a, b)
|
|
|
|
return a.line == b.line and a.pos == b.pos
|
|
|
|
end
|
|
|
|
|
2022-05-29 07:11:53 +01:00
|
|
|
function Text.lt1(a, b)
|
|
|
|
if a.line < b.line then
|
|
|
|
return true
|
|
|
|
end
|
|
|
|
if a.line > b.line then
|
|
|
|
return false
|
|
|
|
end
|
|
|
|
return a.pos < b.pos
|
|
|
|
end
|
|
|
|
|
|
|
|
function Text.le1(a, b)
|
|
|
|
if a.line < b.line then
|
|
|
|
return true
|
|
|
|
end
|
|
|
|
if a.line > b.line then
|
|
|
|
return false
|
|
|
|
end
|
|
|
|
return a.pos <= b.pos
|
|
|
|
end
|
|
|
|
|
2022-06-19 17:03:09 +01:00
|
|
|
function Text.offset(s, pos1)
|
|
|
|
if pos1 == 1 then return 1 end
|
|
|
|
local result = utf8.offset(s, pos1)
|
|
|
|
if result == nil then
|
|
|
|
print(pos1, #s, s)
|
|
|
|
end
|
|
|
|
assert(result)
|
|
|
|
return result
|
|
|
|
end
|
|
|
|
|
2022-08-12 03:34:18 +01:00
|
|
|
function Text.previous_screen_line(State, loc2)
|
|
|
|
if loc2.screen_line > 1 then
|
|
|
|
return {line=loc2.line, screen_line=loc2.screen_line-1, screen_pos=1}
|
|
|
|
elseif loc2.line == 1 then
|
|
|
|
return loc2
|
2022-05-22 07:02:04 +01:00
|
|
|
else
|
2022-08-12 03:34:18 +01:00
|
|
|
local l = State.lines[loc2.line-1]
|
|
|
|
Text.populate_screen_line_starting_pos(State, loc2.line-1)
|
|
|
|
return {line=loc2.line-1, screen_line=#State.line_cache[loc2.line-1].screen_line_starting_pos, screen_pos=1}
|
2022-05-22 07:02:04 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-07-13 01:24:01 +01:00
|
|
|
-- resize helper
|
2022-07-13 04:59:24 +01:00
|
|
|
function Text.tweak_screen_top_and_cursor(State)
|
2022-10-30 00:43:13 +01:00
|
|
|
--? print('a', State.selection1.line)
|
2022-07-13 01:24:01 +01:00
|
|
|
if State.screen_top1.pos == 1 then return end
|
2022-07-17 17:10:33 +01:00
|
|
|
Text.populate_screen_line_starting_pos(State, State.screen_top1.line)
|
2022-07-13 01:24:01 +01:00
|
|
|
local line = State.lines[State.screen_top1.line]
|
2022-07-21 00:34:09 +01:00
|
|
|
local line_cache = State.line_cache[State.screen_top1.line]
|
2022-07-18 05:05:01 +01:00
|
|
|
for i=2,#line_cache.screen_line_starting_pos do
|
|
|
|
local pos = line_cache.screen_line_starting_pos[i]
|
2022-07-13 01:24:01 +01:00
|
|
|
if pos == State.screen_top1.pos then
|
2022-07-01 18:30:52 +01:00
|
|
|
break
|
|
|
|
end
|
2022-07-13 01:24:01 +01:00
|
|
|
if pos > State.screen_top1.pos then
|
2022-07-01 18:30:52 +01:00
|
|
|
-- make sure screen top is at start of a screen line
|
2022-07-18 05:05:01 +01:00
|
|
|
local prev = line_cache.screen_line_starting_pos[i-1]
|
2022-07-13 01:24:01 +01:00
|
|
|
if State.screen_top1.pos - prev < pos - State.screen_top1.pos then
|
|
|
|
State.screen_top1.pos = prev
|
2022-07-01 18:30:52 +01:00
|
|
|
else
|
2022-07-13 01:24:01 +01:00
|
|
|
State.screen_top1.pos = pos
|
2022-07-01 18:30:52 +01:00
|
|
|
end
|
|
|
|
break
|
|
|
|
end
|
|
|
|
end
|
|
|
|
-- make sure cursor is on screen
|
2022-07-13 01:24:01 +01:00
|
|
|
if Text.lt1(State.cursor1, State.screen_top1) then
|
|
|
|
State.cursor1 = {line=State.screen_top1.line, pos=State.screen_top1.pos}
|
|
|
|
elseif State.cursor1.line >= State.screen_bottom1.line then
|
2022-07-01 18:30:52 +01:00
|
|
|
--? print('too low')
|
2022-08-17 17:36:17 +01:00
|
|
|
if Text.cursor_out_of_screen(State) then
|
2022-07-01 18:30:52 +01:00
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--? print('tweak')
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2022-07-13 01:24:01 +01:00
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State.cursor1 = {
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line=State.screen_bottom1.line,
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2022-07-18 06:15:49 +01:00
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pos=Text.to_pos_on_line(State, State.screen_bottom1.line, State.right-5, App.screen.height-5),
|
2022-07-08 23:39:51 +01:00
|
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}
|
2022-07-01 18:30:52 +01:00
|
|
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end
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|
|
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end
|
|
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end
|
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|
|
2022-07-05 19:24:08 +01:00
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|
-- slightly expensive since it redraws the screen
|
2022-08-17 17:36:17 +01:00
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|
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function Text.cursor_out_of_screen(State)
|
2022-12-01 03:31:00 +00:00
|
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edit.draw(State, --[[should be drawn over]] Cursor_color)
|
2022-08-17 17:36:17 +01:00
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return State.cursor_y == nil
|
2022-07-05 19:24:08 +01:00
|
|
|
-- this approach is cheaper and almost works, except on the final screen
|
|
|
|
-- where file ends above bottom of screen
|
2022-08-18 18:22:48 +01:00
|
|
|
--? local botpos = Text.pos_at_start_of_screen_line(State, State.cursor1)
|
2022-07-13 01:14:14 +01:00
|
|
|
--? local botline1 = {line=State.cursor1.line, pos=botpos}
|
|
|
|
--? return Text.lt1(State.screen_bottom1, botline1)
|
2022-07-05 19:24:08 +01:00
|
|
|
end
|
|
|
|
|
2022-07-13 01:24:01 +01:00
|
|
|
function Text.redraw_all(State)
|
2022-06-10 22:52:49 +01:00
|
|
|
--? print('clearing fragments')
|
2022-07-21 00:34:09 +01:00
|
|
|
State.line_cache = {}
|
2022-07-18 05:05:01 +01:00
|
|
|
for i=1,#State.lines do
|
2022-07-21 00:34:09 +01:00
|
|
|
State.line_cache[i] = {}
|
2022-06-03 07:36:07 +01:00
|
|
|
end
|
|
|
|
end
|
|
|
|
|
2022-07-17 16:18:48 +01:00
|
|
|
function Text.clear_screen_line_cache(State, line_index)
|
2022-07-21 00:34:09 +01:00
|
|
|
State.line_cache[line_index].screen_line_starting_pos = nil
|
2022-06-23 19:09:49 +01:00
|
|
|
end
|
2022-08-23 23:06:18 +01:00
|
|
|
|
|
|
|
function trim(s)
|
|
|
|
return s:gsub('^%s+', ''):gsub('%s+$', '')
|
|
|
|
end
|
|
|
|
|
|
|
|
function ltrim(s)
|
|
|
|
return s:gsub('^%s+', '')
|
|
|
|
end
|
|
|
|
|
|
|
|
function rtrim(s)
|
|
|
|
return s:gsub('%s+$', '')
|
|
|
|
end
|
2023-01-03 02:21:55 +00:00
|
|
|
|
|
|
|
function starts_with(s, prefix)
|
|
|
|
if #s < #prefix then
|
|
|
|
return false
|
|
|
|
end
|
|
|
|
for i=1,#prefix do
|
|
|
|
if s:sub(i,i) ~= prefix:sub(i,i) then
|
|
|
|
return false
|
|
|
|
end
|
|
|
|
end
|
|
|
|
return true
|
|
|
|
end
|
2023-01-13 17:10:48 +00:00
|
|
|
|
|
|
|
function ends_with(s, suffix)
|
|
|
|
if #s < #suffix then
|
|
|
|
return false
|
|
|
|
end
|
|
|
|
for i=0,#suffix-1 do
|
|
|
|
if s:sub(#s-i,#s-i) ~= suffix:sub(#suffix-i,#suffix-i) then
|
|
|
|
return false
|
|
|
|
end
|
|
|
|
end
|
|
|
|
return true
|
|
|
|
end
|