diff options
| -rw-r--r-- | app.lua | 2 | ||||
| -rw-r--r-- | text.lua | 113 | ||||
| -rw-r--r-- | text_tests.lua | 2 |
3 files changed, 48 insertions, 69 deletions
diff --git a/app.lua b/app.lua index b6be1b2..b883a75 100644 --- a/app.lua +++ b/app.lua @@ -373,7 +373,7 @@ end -- prepend file/line/test function prepend_debug_info_to_test_failure(test_name, err) local err_without_line_number = err:gsub('^[^:]*:[^:]*: ', '') - local stack_trace = debug.traceback('', --[[stack frame]]4) + local stack_trace = debug.traceback('', --[[stack frame]]5) local file_and_line_number = stack_trace:gsub('stack traceback:\n', ''):gsub(': .*', '') local full_error = file_and_line_number..':'..test_name..' -- '..err_without_line_number --? local full_error = file_and_line_number..':'..test_name..' -- '..err_without_line_number..'\t\t'..stack_trace:gsub('\n', '\n\t\t') diff --git a/text.lua b/text.lua index 0dcd607..4d20deb 100644 --- a/text.lua +++ b/text.lua @@ -4,63 +4,64 @@ Text = {} -- draw a line starting from startpos to screen at y between State.left and State.right -- return the final y, and position of start of final screen line drawn function Text.draw(State, line_index, y, startpos) +--? print('text.draw', line_index, y) local line = State.lines[line_index] local line_cache = State.line_cache[line_index] line_cache.starty = y line_cache.startpos = startpos -- wrap long lines - local x = State.left - local pos = 1 - local screen_line_starting_pos = startpos + local final_screen_line_starting_pos = startpos -- track value to return Text.populate_screen_line_starting_pos(State, line_index) - for _, f in ipairs(line_cache.fragments) do - App.color(Text_color) - local frag_len = utf8.len(f) ---? print('text.draw:', f, 'at', line_index,pos, 'after', x,y) + assert(#line_cache.screen_line_starting_pos >= 1) + for i=1,#line_cache.screen_line_starting_pos do + local pos = line_cache.screen_line_starting_pos[i] if pos < startpos then -- render nothing --? print('skipping', f) else + final_screen_line_starting_pos = pos + local f = Text.screen_line(line, line_cache, i) +--? print('text.draw:', f, 'at', line_index,pos, 'after', x,y) + local frag_len = utf8.len(f) -- render fragment - local frag_width = App.width(f) - if x + frag_width > State.right then - assert(x > State.left) -- no overfull lines - y = y + State.line_height - if y + State.line_height > App.screen.height then - return y, screen_line_starting_pos - end - screen_line_starting_pos = pos - x = State.left - end if State.selection1.line then local lo, hi = Text.clip_selection(State, line_index, pos, pos+frag_len) - Text.draw_highlight(State, line, x,y, pos, lo,hi) + Text.draw_highlight(State, line, State.left,y, pos, lo,hi) end - App.screen.print(f, x,y) + App.color(Text_color) + App.screen.print(f, State.left,y) -- render cursor if necessary if line_index == State.cursor1.line then - if pos <= State.cursor1.pos and pos + frag_len > State.cursor1.pos then + if pos <= State.cursor1.pos and pos + frag_len >= State.cursor1.pos then if State.search_term then if State.lines[State.cursor1.line].data:sub(State.cursor1.pos, State.cursor1.pos+utf8.len(State.search_term)-1) == State.search_term then - local lo_px = Text.draw_highlight(State, line, x,y, pos, State.cursor1.pos, State.cursor1.pos+utf8.len(State.search_term)) + local lo_px = Text.draw_highlight(State, line, State.left,y, pos, State.cursor1.pos, State.cursor1.pos+utf8.len(State.search_term)) App.color(Text_color) - love.graphics.print(State.search_term, x+lo_px,y) + love.graphics.print(State.search_term, State.left+lo_px,y) end else - Text.draw_cursor(State, x+Text.x(f, State.cursor1.pos-pos+1), y) + Text.draw_cursor(State, State.left+Text.x(f, State.cursor1.pos-pos+1), y) end end end - x = x + frag_width + y = y + State.line_height + if y >= App.screen.height then + break + end end - pos = pos + frag_len end - if State.search_term == nil then - if line_index == State.cursor1.line and State.cursor1.pos == pos then - Text.draw_cursor(State, x, y) - end + return y - State.line_height, final_screen_line_starting_pos +end + +function Text.screen_line(line, line_cache, i) + local pos = line_cache.screen_line_starting_pos[i] + local offset = Text.offset(line.data, pos) + if i >= #line_cache.screen_line_starting_pos then + return line.data:sub(offset) end - return y, screen_line_starting_pos + local endpos = line_cache.screen_line_starting_pos[i+1]-1 + local end_offset = Text.offset(line.data, endpos) + return line.data:sub(offset, end_offset) end function Text.draw_cursor(State, x, y) @@ -81,55 +82,34 @@ function Text.populate_screen_line_starting_pos(State, line_index) if line_cache.screen_line_starting_pos then return end - -- duplicate some logic from Text.draw - Text.compute_fragments(State, line_index) line_cache.screen_line_starting_pos = {1} - local x = State.left + local x = 0 local pos = 1 - for _, f in ipairs(line_cache.fragments) do - -- render fragment - local frag_width = App.width(f) - if x + frag_width > State.right then - x = State.left - table.insert(line_cache.screen_line_starting_pos, pos) - end - x = x + frag_width - pos = pos + utf8.len(f) - end -end - -function Text.compute_fragments(State, line_index) - local line = State.lines[line_index] - if line.mode ~= 'text' then return end - local line_cache = State.line_cache[line_index] - if line_cache.fragments then - return - end - line_cache.fragments = {} - local x = State.left -- try to wrap at word boundaries for frag in line.data:gmatch('%S*%s*') do local frag_width = App.width(frag) - while x + frag_width > State.right do - if (x-State.left) < 0.8 * (State.right-State.left) then +--? print('-- frag:', frag, pos, x, frag_width, State.width) + while x + frag_width > State.width do +--? print('frag:', frag, pos, x, frag_width, State.width) + if x < 0.8 * State.width then -- long word; chop it at some letter -- We're not going to reimplement TeX here. - local bpos = Text.nearest_pos_less_than(frag, State.right - x) - if bpos == 0 then break end -- avoid infinite loop when window is too narrow + local bpos = Text.nearest_pos_less_than(frag, State.width - x) + -- everything works if bpos == 0, but is a little inefficient + pos = pos + bpos local boffset = Text.offset(frag, bpos+1) -- byte _after_ bpos - local frag1 = string.sub(frag, 1, boffset-1) - local frag1_width = App.width(frag1) - assert(x + frag1_width <= State.right) - table.insert(line_cache.fragments, frag1) frag = string.sub(frag, boffset) +--? if bpos > 0 then +--? print('after chop:', frag) +--? end frag_width = App.width(frag) end - x = State.left -- new line - end - if #frag > 0 then - table.insert(line_cache.fragments, frag) +--? print('screen line:', pos) + table.insert(line_cache.screen_line_starting_pos, pos) + x = 0 -- new screen line end x = x + frag_width + pos = pos + utf8.len(frag) end end @@ -974,7 +954,6 @@ function Text.redraw_all(State) end function Text.clear_screen_line_cache(State, line_index) - State.line_cache[line_index].fragments = nil State.line_cache[line_index].screen_line_starting_pos = nil end diff --git a/text_tests.lua b/text_tests.lua index 4fe0ca8..cfdffdd 100644 --- a/text_tests.lua +++ b/text_tests.lua @@ -1007,7 +1007,7 @@ function test_pagedown_can_start_from_middle_of_long_wrapping_line() y = y + Editor_state.line_height App.screen.check(y, 'jkl ', 'screen:2') y = y + Editor_state.line_height - App.screen.check(y, 'mno ', 'screen:3') + App.screen.check(y, 'mn', 'screen:3') end function test_pagedown_never_moves_up() |