diff options
Diffstat (limited to 'text.lua')
| -rw-r--r-- | text.lua | 128 |
1 files changed, 64 insertions, 64 deletions
diff --git a/text.lua b/text.lua index 2d2ae7a..d3bbbe7 100644 --- a/text.lua +++ b/text.lua @@ -9,18 +9,18 @@ require 'text_tests' -- return values: -- y coordinate drawn until in px -- position of start of final screen line drawn -function Text.draw(State, line, line_index, top, left, right) +function Text.draw(State, line, line_index, top) --? print('text.draw', line_index) App.color(Text_color) -- wrap long lines - local x = left + local x = State.left local y = top local pos = 1 local screen_line_starting_pos = 1 if line.fragments == nil then - Text.compute_fragments(line, left, right) + Text.compute_fragments(line, State.left, State.right) end - Text.populate_screen_line_starting_pos(line, left, right) + Text.populate_screen_line_starting_pos(line, State.left, State.right) --? print('--') for _, f in ipairs(line.fragments) do local frag, frag_text = f.data, f.text @@ -29,8 +29,8 @@ function Text.draw(State, line, line_index, top, left, right) local frag_len = utf8.len(frag) --? local s=tostring --? print('('..s(x)..','..s(y)..') '..frag..'('..s(frag_width)..' vs '..s(right)..') '..s(line_index)..' vs '..s(State.screen_top1.line)..'; '..s(pos)..' vs '..s(State.screen_top1.pos)..'; bottom: '..s(State.screen_bottom1.line)..'/'..s(State.screen_bottom1.pos)) - if x + frag_width > right then - assert(x > left) -- no overfull lines + if x + frag_width > State.right then + assert(x > State.left) -- no overfull lines -- update y only after drawing the first screen line of screen top if Text.lt1(State.screen_top1, {line=line_index, pos=pos}) then y = y + State.line_height @@ -41,13 +41,13 @@ function Text.draw(State, line, line_index, top, left, right) screen_line_starting_pos = pos --? print('text: new screen line', y, App.screen.height, screen_line_starting_pos) end - x = left + x = State.left end --? print('checking to draw', pos, State.screen_top1.pos) -- don't draw text above screen top if Text.le1(State.screen_top1, {line=line_index, pos=pos}) then if State.selection1.line then - local lo, hi = Text.clip_selection(State, line_index, pos, pos+frag_len, left, right) + local lo, hi = Text.clip_selection(State, line_index, pos, pos+frag_len) Text.draw_highlight(State, line, x,y, pos, lo,hi) end --? print('drawing '..frag) @@ -351,10 +351,10 @@ function Text.insert_return(State) State.cursor1.pos = 1 end -function Text.pageup(State, left, right) +function Text.pageup(State) --? print('pageup') -- duplicate some logic from love.draw - local top2 = Text.to2(State, State.screen_top1, left, right) + local top2 = Text.to2(State, State.screen_top1) --? print(App.screen.height) local y = App.screen.height - State.line_height while y >= State.top do @@ -365,22 +365,22 @@ function Text.pageup(State, left, right) elseif State.lines[State.screen_top1.line].mode == 'drawing' then y = y - State.drawing_padding_height - Drawing.pixels(State.lines[State.screen_top1.line].h) end - top2 = Text.previous_screen_line(State, top2, left, right) + top2 = Text.previous_screen_line(State, top2) end State.screen_top1 = Text.to1(State, top2) State.cursor1.line = State.screen_top1.line State.cursor1.pos = State.screen_top1.pos - Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary(State, left, right) + Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary(State) --? print(State.cursor1.line, State.cursor1.pos, State.screen_top1.line, State.screen_top1.pos) --? print('pageup end') end -function Text.pagedown(State, left, right) +function Text.pagedown(State) --? print('pagedown') -- 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. - local top2 = Text.to2(State, State.screen_bottom1, left, right) + local top2 = Text.to2(State, State.screen_bottom1) if top2.screen_line > 1 then top2.screen_line = math.max(top2.screen_line-10, 1) end @@ -394,16 +394,16 @@ function Text.pagedown(State, left, right) --? print('setting top to', State.screen_top1.line, State.screen_top1.pos) State.cursor1.line = State.screen_top1.line State.cursor1.pos = State.screen_top1.pos - Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary(State, left, right) + Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary(State) --? print('top now', State.screen_top1.line) Text.redraw_all(State) -- if we're scrolling, reclaim all fragments to avoid memory leaks --? print('pagedown end') end -function Text.up(State, left, right) +function Text.up(State) assert(State.lines[State.cursor1.line].mode == 'text') --? print('up', State.cursor1.line, State.cursor1.pos, State.screen_top1.line, State.screen_top1.pos) - local screen_line_index,screen_line_starting_pos = Text.pos_at_start_of_cursor_screen_line(State, left, right) + local screen_line_index,screen_line_starting_pos = Text.pos_at_start_of_cursor_screen_line(State) 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 @@ -413,7 +413,7 @@ function Text.up(State, left, right) if State.lines[new_cursor_line].mode == 'text' then --? print('found previous text line') State.cursor1.line = new_cursor_line - Text.populate_screen_line_starting_pos(State.lines[State.cursor1.line], left, right) + Text.populate_screen_line_starting_pos(State.lines[State.cursor1.line], State.left, State.right) -- previous text line found, pick its final screen line --? print('has multiple screen lines') local screen_line_starting_pos = State.lines[State.cursor1.line].screen_line_starting_pos @@ -427,7 +427,7 @@ function Text.up(State, left, right) end 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) - State.cursor1.pos = screen_line_starting_pos + Text.nearest_cursor_pos(s, State.cursor_x, left) - 1 + State.cursor1.pos = screen_line_starting_pos + Text.nearest_cursor_pos(s, State.cursor_x, State.left) - 1 break end end @@ -446,15 +446,15 @@ function Text.up(State, left, right) end 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) - State.cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, State.cursor_x, left) - 1 + State.cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, State.cursor_x, State.left) - 1 --? print('cursor pos is now '..tostring(State.cursor1.pos)) end end -function Text.down(State, left, right) +function Text.down(State) assert(State.lines[State.cursor1.line].mode == 'text') --? print('down', State.cursor1.line, State.cursor1.pos, State.screen_top1.line, State.screen_top1.pos, State.screen_bottom1.line, State.screen_bottom1.pos) - if Text.cursor_at_final_screen_line(State, left, right) then + if Text.cursor_at_final_screen_line(State) then -- line is done, skip to next text line --? print('cursor at final screen line of its line') local new_cursor_line = State.cursor1.line @@ -462,7 +462,7 @@ function Text.down(State, left, right) new_cursor_line = new_cursor_line+1 if State.lines[new_cursor_line].mode == 'text' then State.cursor1.line = new_cursor_line - State.cursor1.pos = Text.nearest_cursor_pos(State.lines[State.cursor1.line].data, State.cursor_x, left) + State.cursor1.pos = Text.nearest_cursor_pos(State.lines[State.cursor1.line].data, State.cursor_x, State.left) --? print(State.cursor1.pos) break end @@ -470,7 +470,7 @@ function Text.down(State, left, right) if State.cursor1.line > State.screen_bottom1.line then --? print('screen top before:', State.screen_top1.line, State.screen_top1.pos) --? print('scroll up preserving cursor') - Text.snap_cursor_to_bottom_of_screen(State, left, right) + Text.snap_cursor_to_bottom_of_screen(State) --? print('screen top after:', State.screen_top1.line, State.screen_top1.pos) end else @@ -480,16 +480,16 @@ function Text.down(State, left, right) scroll_down = true end --? print('cursor is NOT at final screen line of its line') - local screen_line_index, screen_line_starting_pos = Text.pos_at_start_of_cursor_screen_line(State, left, right) + local screen_line_index, screen_line_starting_pos = Text.pos_at_start_of_cursor_screen_line(State) new_screen_line_starting_pos = State.lines[State.cursor1.line].screen_line_starting_pos[screen_line_index+1] --? print('switching pos of screen line at cursor from '..tostring(screen_line_starting_pos)..' to '..tostring(new_screen_line_starting_pos)) 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) - State.cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, State.cursor_x, left) - 1 + State.cursor1.pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, State.cursor_x, State.left) - 1 --? print('cursor pos is now', State.cursor1.line, State.cursor1.pos) if scroll_down then --? print('scroll up preserving cursor') - Text.snap_cursor_to_bottom_of_screen(State, left, right) + Text.snap_cursor_to_bottom_of_screen(State) --? print('screen top after:', State.screen_top1.line, State.screen_top1.pos) end end @@ -503,16 +503,16 @@ function Text.start_of_line(State) end end -function Text.end_of_line(State, left, right) +function Text.end_of_line(State) State.cursor1.pos = utf8.len(State.lines[State.cursor1.line].data) + 1 - local _,botpos = Text.pos_at_start_of_cursor_screen_line(State, left, right) + local _,botpos = Text.pos_at_start_of_cursor_screen_line(State) local botline1 = {line=State.cursor1.line, pos=botpos} if Text.cursor_past_screen_bottom(State) then - Text.snap_cursor_to_bottom_of_screen(State, left, right) + Text.snap_cursor_to_bottom_of_screen(State) end end -function Text.word_left(State, left, right) +function Text.word_left(State) -- skip some whitespace while true do if State.cursor1.pos == 1 then @@ -521,11 +521,11 @@ function Text.word_left(State, left, right) if Text.match(State.lines[State.cursor1.line].data, State.cursor1.pos-1, '%S') then break end - Text.left(State, left, right) + Text.left(State) end -- skip some non-whitespace while true do - Text.left(State, left, right) + Text.left(State) if State.cursor1.pos == 1 then break end @@ -536,7 +536,7 @@ function Text.word_left(State, left, right) end end -function Text.word_right(State, left, right) +function Text.word_right(State) -- skip some whitespace while true do if State.cursor1.pos > utf8.len(State.lines[State.cursor1.line].data) then @@ -557,7 +557,7 @@ function Text.word_right(State, left, right) end end if Text.cursor_past_screen_bottom(State) then - Text.snap_cursor_to_bottom_of_screen(State, left, right) + Text.snap_cursor_to_bottom_of_screen(State) end end @@ -570,7 +570,7 @@ function Text.match(s, pos, pat) return curr:match(pat) end -function Text.left(State, left, right) +function Text.left(State) assert(State.lines[State.cursor1.line].mode == 'text') if State.cursor1.pos > 1 then State.cursor1.pos = State.cursor1.pos-1 @@ -586,16 +586,16 @@ function Text.left(State, left, right) end end if Text.lt1(State.cursor1, State.screen_top1) then - local top2 = Text.to2(State, State.screen_top1, left, right) - top2 = Text.previous_screen_line(State, top2, left, right) + local top2 = Text.to2(State, State.screen_top1) + top2 = Text.previous_screen_line(State, top2) State.screen_top1 = Text.to1(State, top2) end end -function Text.right(State, left, right) +function Text.right(State) Text.right_without_scroll(State) if Text.cursor_past_screen_bottom(State) then - Text.snap_cursor_to_bottom_of_screen(State, left, right) + Text.snap_cursor_to_bottom_of_screen(State) end end @@ -616,8 +616,8 @@ function Text.right_without_scroll(State) end end -function Text.pos_at_start_of_cursor_screen_line(State, left, right) - Text.populate_screen_line_starting_pos(State.lines[State.cursor1.line], left, right) +function Text.pos_at_start_of_cursor_screen_line(State) + Text.populate_screen_line_starting_pos(State.lines[State.cursor1.line], State.left, State.right) for i=#State.lines[State.cursor1.line].screen_line_starting_pos,1,-1 do local spos = State.lines[State.cursor1.line].screen_line_starting_pos[i] if spos <= State.cursor1.pos then @@ -627,14 +627,14 @@ function Text.pos_at_start_of_cursor_screen_line(State, left, right) assert(false) end -function Text.cursor_at_final_screen_line(State, left, right) - Text.populate_screen_line_starting_pos(State.lines[State.cursor1.line], left, right) +function Text.cursor_at_final_screen_line(State) + Text.populate_screen_line_starting_pos(State.lines[State.cursor1.line], State.left, State.right) local screen_lines = State.lines[State.cursor1.line].screen_line_starting_pos --? print(screen_lines[#screen_lines], State.cursor1.pos) return screen_lines[#screen_lines] <= State.cursor1.pos end -function Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary(State, left, right) +function Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necessary(State) local y = State.top while State.cursor1.line <= #State.lines do if State.lines[State.cursor1.line].mode == 'text' then @@ -652,13 +652,13 @@ function Text.move_cursor_down_to_next_text_line_while_scrolling_again_if_necess --? print(y, App.screen.height, App.screen.height-State.line_height) if y > App.screen.height - State.line_height then --? print('scroll up') - Text.snap_cursor_to_bottom_of_screen(State, left, right) + Text.snap_cursor_to_bottom_of_screen(State) end end -- should never modify State.cursor1 -function Text.snap_cursor_to_bottom_of_screen(State, left, right) - local top2 = Text.to2(State, State.cursor1, left, right) +function Text.snap_cursor_to_bottom_of_screen(State) + local top2 = Text.to2(State, State.cursor1) top2.screen_pos = 1 -- start of screen line --? 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 @@ -684,7 +684,7 @@ function Text.snap_cursor_to_bottom_of_screen(State, left, right) --? print('skipping drawing of height', h) y = y - h end - top2 = Text.previous_screen_line(State, top2, left, right) + top2 = Text.previous_screen_line(State, top2) end --? print('top2 finally:', top2.line, top2.screen_line, top2.screen_pos) State.screen_top1 = Text.to1(State, top2) @@ -692,18 +692,18 @@ function Text.snap_cursor_to_bottom_of_screen(State, left, right) Text.redraw_all(State) -- if we're scrolling, reclaim all fragments to avoid memory leaks end -function Text.in_line(State, line, x,y, left,right) +function Text.in_line(State, line, x,y) if line.starty == nil then return false end -- outside current page - if x < left then return false end + if x < State.left then return false end if y < line.starty then return false end - Text.populate_screen_line_starting_pos(line, left, right) + Text.populate_screen_line_starting_pos(line, State.left, State.right) return y < line.starty + State.line_height*(#line.screen_line_starting_pos - Text.screen_line_index(line, line.startpos) + 1) end -- convert mx,my in pixels to schema-1 coordinates -function Text.to_pos_on_line(State, line, mx, my, left, right) +function Text.to_pos_on_line(State, line, mx, my) if line.fragments == nil then - Text.compute_fragments(line, left, right) + Text.compute_fragments(line, State.left, State.right) end assert(my >= line.starty) -- duplicate some logic from Text.draw @@ -723,8 +723,8 @@ function Text.to_pos_on_line(State, line, mx, my, left, right) return line.screen_line_starting_pos[screen_line_index+1]-1 end local s = string.sub(line.data, screen_line_starting_byte_offset) ---? print('return', mx, Text.nearest_cursor_pos(s, mx, left), '=>', screen_line_starting_pos + Text.nearest_cursor_pos(s, mx, left) - 1) - return screen_line_starting_pos + Text.nearest_cursor_pos(s, mx, left) - 1 +--? 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 end y = nexty end @@ -833,12 +833,12 @@ function Text.x(s, pos) return App.width(text_before) end -function Text.to2(State, pos1, left, right) +function Text.to2(State, pos1) if State.lines[pos1.line].mode == 'drawing' then return {line=pos1.line, screen_line=1, screen_pos=1} end local result = {line=pos1.line, screen_line=1} - Text.populate_screen_line_starting_pos(State.lines[pos1.line], left, right) + Text.populate_screen_line_starting_pos(State.lines[pos1.line], State.left, State.right) for i=#State.lines[pos1.line].screen_line_starting_pos,1,-1 do local spos = State.lines[pos1.line].screen_line_starting_pos[i] if spos <= pos1.pos then @@ -893,7 +893,7 @@ function Text.offset(s, pos1) return result end -function Text.previous_screen_line(State, pos2, left, right) +function Text.previous_screen_line(State, pos2) if pos2.screen_line > 1 then return {line=pos2.line, screen_line=pos2.screen_line-1, screen_pos=1} elseif pos2.line == 1 then @@ -902,7 +902,7 @@ function Text.previous_screen_line(State, pos2, left, right) return {line=pos2.line-1, screen_line=1, screen_pos=1} else local l = State.lines[pos2.line-1] - Text.populate_screen_line_starting_pos(State.lines[pos2.line-1], left, right) + Text.populate_screen_line_starting_pos(State.lines[pos2.line-1], State.left, State.right) return {line=pos2.line-1, screen_line=#State.lines[pos2.line-1].screen_line_starting_pos, screen_pos=1} end end @@ -933,11 +933,11 @@ function Text.populate_screen_line_starting_pos(line, left, right) end -- resize helper -function Text.tweak_screen_top_and_cursor(State, left, right) +function Text.tweak_screen_top_and_cursor(State) --? print('a', State.selection1.line) if State.screen_top1.pos == 1 then return end local line = State.lines[State.screen_top1.line] - Text.populate_screen_line_starting_pos(line, left, right) + Text.populate_screen_line_starting_pos(line, State.left, State.right) for i=2,#line.screen_line_starting_pos do local pos = line.screen_line_starting_pos[i] if pos == State.screen_top1.pos then @@ -964,7 +964,7 @@ function Text.tweak_screen_top_and_cursor(State, left, right) local line = State.lines[State.screen_bottom1.line] State.cursor1 = { line=State.screen_bottom1.line, - pos=Text.to_pos_on_line(State, line, App.screen.width-5, App.screen.height-5, left, right), + pos=Text.to_pos_on_line(State, line, App.screen.width-5, App.screen.height-5), } end end @@ -976,7 +976,7 @@ function Text.cursor_past_screen_bottom(State) return State.cursor_y >= App.screen.height - State.line_height -- this approach is cheaper and almost works, except on the final screen -- where file ends above bottom of screen ---? local _,botpos = Text.pos_at_start_of_cursor_screen_line(State, left, right) +--? local _,botpos = Text.pos_at_start_of_cursor_screen_line(State) --? local botline1 = {line=State.cursor1.line, pos=botpos} --? return Text.lt1(State.screen_bottom1, botline1) end |