end
-- return y drawn until
function edit.draw(State)
App.color(Text_color)
if #State.lines ~= #State.line_cache then
print(('line_cache is out of date; %d when it should be %d'):format(#State.line_cache, #State.lines))
assert(false)
end
if not Text.le1(State.screen_top1, State.cursor1) then
print(State.screen_top1.line, State.screen_top1.pos, State.cursor1.line, State.cursor1.pos)
assert(false)
end
State.cursor_x = nil
State.cursor_y = nil
local y = State.top
local screen_bottom1 = {line=nil, pos=nil}
--? print('== draw')
for line_index = State.screen_top1.line,#State.lines do
local line = State.lines[line_index]
--? print('draw:', y, line_index, line)
if y + State.line_height > App.screen.height then break end
screen_bottom1.line = line_index
--? print('text.draw', y, line_index)
local startpos = 1
if line_index == State.screen_top1.line then
startpos = State.screen_top1.pos
end
y, screen_bottom1.pos = Text.draw(State, line_index, y, startpos)
--? print('=> y', y)
end
State.screen_bottom1 = screen_bottom1
if State.search_term then
Text.draw_search_bar(State)
end
return y
end
function edit.update(State, dt)
end
function edit.quit(State)
end
function edit.mouse_press(State, x,y, mouse_button)
if State.search_term then return end
--? print_and_log(('edit.mouse_press: cursor at %d,%d'):format(State.cursor1.line, State.cursor1.pos))
if y < State.top then
State.old_cursor1 = State.cursor1
State.old_selection1 = State.selection1
State.mousepress_shift = App.shift_down()
State.selection1 = {
line=State.screen_top1.line,
pos=State.screen_top1.pos,
}
return
end
for line_index,line in ipairs(State.lines) do
if Text.in_line(State, line_index, x,y) then
-- delicate dance between cursor, selection and old cursor/selection
-- scenarios:
-- regular press+release: sets cursor, clears selection
-- shift press+release:
-- sets selection to old cursor if not set otherwise leaves it untouched
-- sets cursor
-- press and hold to start a selection: sets selection on press, cursor on release
-- press and hold, then press shift: ignore shift
-- i.e. mouse_release should never look at shift state
--? print_and_log(('edit.mouse_press: in line %d'):format(line_index))
State.old_cursor1 = State.cursor1
State.old_selection1 = State.selection1
State.mousepress_shift = App.shift_down()
State.selection1 = {
line=line_index,
pos=Text.to_pos_on_line(State, line_index, x, y),
}
return
end
end
-- still here? click is below all screen lines
State.old_cursor1 = State.cursor1
State.old_selection1 = State.selection1
State.mousepress_shift = App.shift_down()
State.selection1 = {
line=State.screen_bottom1.line,
pos=Text.pos_at_end_of_screen_line(State, State.screen_bottom1),
}
end
function edit.mouse_release(State, x,y, mouse_button)
if State.search_term then return end
--? print_and_log(('edit.mouse_release(%d,%d): cursor at %d,%d'):format(x,y, State.cursor1.line, State.cursor1.pos))
for line_index,line in ipairs(State.lines) do
if Text.in_line(State, line_index, x,y) then
--? print_and_log(('edit.mouse_release: in line %d'):format(line_index))
State.cursor1 = {
line=line_index,
pos=Text.to_pos_on_line(State, line_index, x, y),
}
--? print_and_log(('edit.mouse_release: cursor now %d,%d'):format(State.cursor1.line, State.cursor1.pos))
if State.mousepress_shift then
if State.old_selection1.line == nil then
State.selection1 = State.old_cursor1
else
State.selection1 = State.old_selection1
end
end
State.old_cursor1, State.old_selection1, State.mousepress_shift = nil
if eq(State.cursor1, State.selection1) then
State.selection1 = {}
end
break
end
end
--? print_and_log(('edit.mouse_release: finally selection %s,%s cursor %d,%d'):format(tostring(State.selection1.line), tostring(State.selection1.pos), State.cursor1.line, State.cursor1.pos))
end
function edit.mouse_wheel_move(State, dx,dy)
if dy > 0 then
State.cursor1 = {line=State.screen_top1.line, pos=State.screen_top1.pos}
edit.put_cursor_on_next_text_line(State)
for i=1,math.floor(dy) do
Text.up(State)
end
elseif dy < 0 then
State.cursor1 = {line=State.screen_bottom1.line, pos=State.screen_bottom1.pos}
edit.put_cursor_on_next_text_line(State)
for i=1,math.floor(-dy) do
Text.down(State)
end
end
end
function edit.text_input(State, t)
--? print('text input', t)
if State.search_term then
State.search_term = State.search_term..t
Text.search_next(State)
end
end
function edit.keychord_press(State, chord, key)
if State.selection1.line and
-- printable character created using shift key => delete selection
-- (we're not creating any ctrl-shift- or alt-shift- combinations using regular/printable keys)
(not App.shift_down() or utf8.len(key) == 1) and
chord ~= 'C-a' and chord ~= 'C-c' and chord ~= 'C-x' and chord ~= 'backspace' and chord ~= 'delete' and chord ~= 'C-z' and chord ~= 'C-y' and not App.is_cursor_movement(chord) then
Text.delete_selection(State, State.left, State.right)
end
if State.search_term then
for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end -- just in case we scroll
if chord == 'escape' then
State.search_term = nil
State.cursor1 = State.search_backup.cursor
State.screen_top1 = State.search_backup.screen_top
State.search_backup = nil
Text.redraw_all(State) -- if we're scrolling, reclaim all fragments to avoid memory leaks
elseif chord == 'return' then
State.search_term = nil
State.search_backup = nil
elseif chord == 'backspace' then
local len = utf8.len(State.search_term)
local byte_offset = Text.offset(State.search_term, len)
State.search_term = string.sub(State.search_term, 1, byte_offset-1)
elseif chord == 'down' then
State.cursor1.pos = State.cursor1.pos+1
Text.search_next(State)
elseif chord == 'up' then
Text.search_previous(State)
end
return
elseif chord == 'C-f' then
State.search_term = ''
State.search_backup = {
cursor={line=State.cursor1.line, pos=State.cursor1.pos},
screen_top={line=State.screen_top1.line, pos=State.screen_top1.pos},
}
-- zoom
elseif chord == 'C-=' then
edit.update_font_settings(State, State.font_height+2)
Text.redraw_all(State)
elseif chord == 'C--' then
if State.font_height > 2 then
edit.update_font_settings(State, State.font_height-2)
Text.redraw_all(State)
end
elseif chord == 'C-0' then
edit.update_font_settings(State, 20)
Text.redraw_all(State)
-- clipboard
elseif chord == 'C-a' then
State.selection1 = {line=1, pos=1}
State.cursor1 = {line=#State.lines, pos=utf8.len(State.lines[#State.lines].data)+1}
elseif chord == 'C-c' then
local s = Text.selection(State)
if s then
App.set_clipboard(s)
end
-- dispatch to text
else
for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end -- just in case we scroll
Text.keychord_press(State, chord)
end
end
function edit.key_release(State, key, scancode)
end
function edit.update_font_settings(State, font_height)
State.font_height = font_height
love.graphics.setFont(love.graphics.newFont(State.font_height))
State.line_height = math.floor(font_height*1.3)
end
--== some methods for tests
-- Insulate tests from some key globals so I don't have to change the vast
-- majority of tests when they're modified for the real app.
Test_margin_left = 25
Test_margin_right = 0
function edit.initialize_test_state()
-- if you change these values, tests will start failing
return edit.initialize_state(
15, -- top margin
Test_margin_left,
App.screen.width - Test_margin_right,
14, -- font height assuming default LÖVE font
15) -- line height
end
-- all text_input events are also keypresses
-- TODO: handle chords of multiple keys
function edit.run_after_text_input(State, t)
edit.keychord_press(State, t)
edit.text_input(State, t)
edit.key_release(State, t)
App.screen.contents = {}
edit.update(State, 0)
edit.draw(State)
end
-- not all keys are text_input
function edit.run_after_keychord(State, chord)
edit.keychord_press(State, chord)
edit.key_release(State, chord)
App.screen.contents = {}
edit.update(State, 0)
edit.draw(State)
end
function edit.run_after_mouse_click(State, x,y, mouse_button)
App.fake_mouse_press(x,y, mouse_button)
edit.mouse_press(State, x,y, mouse_button)
App.fake_mouse_release(x,y, mouse_button)
edit.mouse_release(State, x,y, mouse_button)
App.screen.contents = {}
edit.update(State, 0)
edit.draw(State)
end
function edit.run_after_mouse_press(State, x,y, mouse_button)
App.fake_mouse_press(x,y, mouse_button)
edit.mouse_press(State, x,y, mouse_button)
App.screen.contents = {}
edit.update(State, 0)
edit.draw(State)