| 1 |
module fgof_screen |
| 2 |
use fgof_screen_types, only : & |
| 3 |
screen_buffer, & |
| 4 |
screen_cell, & |
| 5 |
screen_damage, & |
| 6 |
screen_diff, & |
| 7 |
screen_size, & |
| 8 |
screen_style |
| 9 |
implicit none |
| 10 |
private |
| 11 |
|
| 12 |
public :: & |
| 13 |
allocate_screen, & |
| 14 |
clear_screen, & |
| 15 |
clear_screen_buffer, & |
| 16 |
clear_screen_cell, & |
| 17 |
clear_screen_damage, & |
| 18 |
clear_screen_diff, & |
| 19 |
clear_screen_size, & |
| 20 |
clear_screen_style, & |
| 21 |
diff_screen, & |
| 22 |
fill_screen, & |
| 23 |
put_cell, & |
| 24 |
put_glyph, & |
| 25 |
render_cursor_ansi, & |
| 26 |
render_screen_ansi, & |
| 27 |
render_screen_diff_ansi, & |
| 28 |
resize_screen, & |
| 29 |
set_cursor, & |
| 30 |
screen_buffer, & |
| 31 |
screen_cell, & |
| 32 |
screen_damage, & |
| 33 |
screen_diff, & |
| 34 |
screen_size, & |
| 35 |
screen_style |
| 36 |
|
| 37 |
contains |
| 38 |
|
| 39 |
function clear_screen_style() result(style) |
| 40 |
type(screen_style) :: style |
| 41 |
|
| 42 |
style%fg = -1 |
| 43 |
style%bg = -1 |
| 44 |
style%bold = .false. |
| 45 |
style%dim = .false. |
| 46 |
style%italic = .false. |
| 47 |
style%underline = .false. |
| 48 |
style%inverse = .false. |
| 49 |
end function clear_screen_style |
| 50 |
|
| 51 |
function clear_screen_cell() result(cell) |
| 52 |
type(screen_cell) :: cell |
| 53 |
|
| 54 |
cell%glyph = " " |
| 55 |
cell%style = clear_screen_style() |
| 56 |
end function clear_screen_cell |
| 57 |
|
| 58 |
function clear_screen_size() result(size_value) |
| 59 |
type(screen_size) :: size_value |
| 60 |
|
| 61 |
size_value%width = 0 |
| 62 |
size_value%height = 0 |
| 63 |
end function clear_screen_size |
| 64 |
|
| 65 |
function clear_screen_damage() result(damage) |
| 66 |
type(screen_damage) :: damage |
| 67 |
|
| 68 |
damage%active = .false. |
| 69 |
damage%row_first = 0 |
| 70 |
damage%row_last = 0 |
| 71 |
damage%col_first = 0 |
| 72 |
damage%col_last = 0 |
| 73 |
damage%changed_cells = 0 |
| 74 |
end function clear_screen_damage |
| 75 |
|
| 76 |
function clear_screen_diff() result(diff) |
| 77 |
type(screen_diff) :: diff |
| 78 |
|
| 79 |
diff%changed = .false. |
| 80 |
diff%size_changed = .false. |
| 81 |
diff%cursor_changed = .false. |
| 82 |
diff%cursor_visibility_changed = .false. |
| 83 |
diff%previous_size = clear_screen_size() |
| 84 |
diff%current_size = clear_screen_size() |
| 85 |
diff%damage = clear_screen_damage() |
| 86 |
end function clear_screen_diff |
| 87 |
|
| 88 |
function clear_screen_buffer() result(buffer) |
| 89 |
type(screen_buffer) :: buffer |
| 90 |
|
| 91 |
buffer%size = clear_screen_size() |
| 92 |
buffer%cursor_row = 1 |
| 93 |
buffer%cursor_col = 1 |
| 94 |
buffer%cursor_visible = .true. |
| 95 |
end function clear_screen_buffer |
| 96 |
|
| 97 |
function allocate_screen(width, height) result(buffer) |
| 98 |
integer, intent(in) :: width |
| 99 |
integer, intent(in) :: height |
| 100 |
type(screen_buffer) :: buffer |
| 101 |
|
| 102 |
buffer = clear_screen_buffer() |
| 103 |
if (width <= 0 .or. height <= 0) return |
| 104 |
|
| 105 |
buffer%size%width = width |
| 106 |
buffer%size%height = height |
| 107 |
allocate(buffer%cells(height, width)) |
| 108 |
call clear_screen(buffer) |
| 109 |
call clamp_cursor(buffer) |
| 110 |
end function allocate_screen |
| 111 |
|
| 112 |
subroutine resize_screen(buffer, width, height) |
| 113 |
type(screen_buffer), intent(inout) :: buffer |
| 114 |
integer, intent(in) :: width |
| 115 |
integer, intent(in) :: height |
| 116 |
type(screen_cell), allocatable :: grown(:, :) |
| 117 |
integer :: copy_height |
| 118 |
integer :: copy_width |
| 119 |
|
| 120 |
if (width <= 0 .or. height <= 0) then |
| 121 |
if (allocated(buffer%cells)) deallocate(buffer%cells) |
| 122 |
buffer%size = clear_screen_size() |
| 123 |
call clamp_cursor(buffer) |
| 124 |
return |
| 125 |
end if |
| 126 |
|
| 127 |
allocate(grown(height, width)) |
| 128 |
grown = clear_screen_cell() |
| 129 |
|
| 130 |
if (allocated(buffer%cells)) then |
| 131 |
copy_height = min(size(buffer%cells, 1), height) |
| 132 |
copy_width = min(size(buffer%cells, 2), width) |
| 133 |
if (copy_height > 0 .and. copy_width > 0) then |
| 134 |
grown(:copy_height, :copy_width) = buffer%cells(:copy_height, :copy_width) |
| 135 |
end if |
| 136 |
deallocate(buffer%cells) |
| 137 |
end if |
| 138 |
|
| 139 |
call move_alloc(grown, buffer%cells) |
| 140 |
buffer%size%width = width |
| 141 |
buffer%size%height = height |
| 142 |
call clamp_cursor(buffer) |
| 143 |
end subroutine resize_screen |
| 144 |
|
| 145 |
subroutine fill_screen(buffer, glyph, style) |
| 146 |
type(screen_buffer), intent(inout) :: buffer |
| 147 |
character(len=*), intent(in) :: glyph |
| 148 |
type(screen_style), intent(in), optional :: style |
| 149 |
type(screen_cell) :: fill_cell |
| 150 |
integer :: row |
| 151 |
integer :: col |
| 152 |
|
| 153 |
if (.not. allocated(buffer%cells)) return |
| 154 |
|
| 155 |
fill_cell = clear_screen_cell() |
| 156 |
if (len(glyph) > 0) fill_cell%glyph = glyph(1:1) |
| 157 |
if (present(style)) fill_cell%style = style |
| 158 |
|
| 159 |
do row = 1, size(buffer%cells, 1) |
| 160 |
do col = 1, size(buffer%cells, 2) |
| 161 |
buffer%cells(row, col) = fill_cell |
| 162 |
end do |
| 163 |
end do |
| 164 |
end subroutine fill_screen |
| 165 |
|
| 166 |
subroutine clear_screen(buffer, style) |
| 167 |
type(screen_buffer), intent(inout) :: buffer |
| 168 |
type(screen_style), intent(in), optional :: style |
| 169 |
|
| 170 |
call fill_screen(buffer, " ", style) |
| 171 |
end subroutine clear_screen |
| 172 |
|
| 173 |
subroutine put_cell(buffer, row, col, cell) |
| 174 |
type(screen_buffer), intent(inout) :: buffer |
| 175 |
integer, intent(in) :: row |
| 176 |
integer, intent(in) :: col |
| 177 |
type(screen_cell), intent(in) :: cell |
| 178 |
|
| 179 |
if (.not. screen_index_in_bounds(buffer, row, col)) return |
| 180 |
buffer%cells(row, col) = cell |
| 181 |
end subroutine put_cell |
| 182 |
|
| 183 |
subroutine put_glyph(buffer, row, col, glyph, style) |
| 184 |
type(screen_buffer), intent(inout) :: buffer |
| 185 |
integer, intent(in) :: row |
| 186 |
integer, intent(in) :: col |
| 187 |
character(len=*), intent(in) :: glyph |
| 188 |
type(screen_style), intent(in), optional :: style |
| 189 |
type(screen_cell) :: cell |
| 190 |
|
| 191 |
if (.not. screen_index_in_bounds(buffer, row, col)) return |
| 192 |
|
| 193 |
cell = buffer%cells(row, col) |
| 194 |
if (len(glyph) > 0) cell%glyph = glyph(1:1) |
| 195 |
if (present(style)) cell%style = style |
| 196 |
call put_cell(buffer, row, col, cell) |
| 197 |
end subroutine put_glyph |
| 198 |
|
| 199 |
subroutine set_cursor(buffer, row, col) |
| 200 |
type(screen_buffer), intent(inout) :: buffer |
| 201 |
integer, intent(in) :: row |
| 202 |
integer, intent(in) :: col |
| 203 |
|
| 204 |
buffer%cursor_row = row |
| 205 |
buffer%cursor_col = col |
| 206 |
call clamp_cursor(buffer) |
| 207 |
end subroutine set_cursor |
| 208 |
|
| 209 |
function diff_screen(previous, current) result(diff) |
| 210 |
type(screen_buffer), intent(in) :: previous |
| 211 |
type(screen_buffer), intent(in) :: current |
| 212 |
type(screen_diff) :: diff |
| 213 |
integer :: max_rows |
| 214 |
integer :: max_cols |
| 215 |
integer :: row |
| 216 |
integer :: col |
| 217 |
|
| 218 |
diff = clear_screen_diff() |
| 219 |
diff%previous_size = previous%size |
| 220 |
diff%current_size = current%size |
| 221 |
diff%size_changed = .not. screen_sizes_equal(previous%size, current%size) |
| 222 |
diff%cursor_changed = previous%cursor_row /= current%cursor_row .or. & |
| 223 |
previous%cursor_col /= current%cursor_col |
| 224 |
diff%cursor_visibility_changed = previous%cursor_visible .neqv. current%cursor_visible |
| 225 |
|
| 226 |
max_rows = max(previous%size%height, current%size%height) |
| 227 |
max_cols = max(previous%size%width, current%size%width) |
| 228 |
|
| 229 |
do row = 1, max_rows |
| 230 |
do col = 1, max_cols |
| 231 |
if (screen_cell_changed(previous, current, row, col)) then |
| 232 |
call record_damage(diff%damage, row, col) |
| 233 |
end if |
| 234 |
end do |
| 235 |
end do |
| 236 |
|
| 237 |
diff%changed = diff%damage%active .or. diff%size_changed .or. & |
| 238 |
diff%cursor_changed .or. diff%cursor_visibility_changed |
| 239 |
end function diff_screen |
| 240 |
|
| 241 |
function render_screen_ansi(buffer) result(output) |
| 242 |
type(screen_buffer), intent(in) :: buffer |
| 243 |
character(len=:), allocatable :: output |
| 244 |
integer :: row |
| 245 |
|
| 246 |
output = hide_cursor_ansi() // clear_screen_ansi() |
| 247 |
|
| 248 |
if (allocated(buffer%cells)) then |
| 249 |
do row = 1, size(buffer%cells, 1) |
| 250 |
output = output // move_cursor_ansi(row, 1) |
| 251 |
output = output // render_current_row_ansi(buffer, row, 1, size(buffer%cells, 2)) |
| 252 |
end do |
| 253 |
end if |
| 254 |
|
| 255 |
output = output // reset_style_ansi() // render_cursor_ansi(buffer) |
| 256 |
end function render_screen_ansi |
| 257 |
|
| 258 |
function render_screen_diff_ansi(previous, current) result(output) |
| 259 |
type(screen_buffer), intent(in) :: previous |
| 260 |
type(screen_buffer), intent(in) :: current |
| 261 |
character(len=:), allocatable :: output |
| 262 |
type(screen_diff) :: diff |
| 263 |
integer :: row |
| 264 |
|
| 265 |
diff = diff_screen(previous, current) |
| 266 |
if (.not. diff%changed) then |
| 267 |
output = "" |
| 268 |
return |
| 269 |
end if |
| 270 |
|
| 271 |
output = "" |
| 272 |
if (diff%damage%active) then |
| 273 |
output = hide_cursor_ansi() |
| 274 |
do row = diff%damage%row_first, diff%damage%row_last |
| 275 |
output = output // move_cursor_ansi(row, diff%damage%col_first) |
| 276 |
output = output // render_diff_row_ansi(previous, current, row, diff%damage%col_first, diff%damage%col_last) |
| 277 |
end do |
| 278 |
output = output // reset_style_ansi() |
| 279 |
end if |
| 280 |
|
| 281 |
output = output // render_cursor_ansi(current) |
| 282 |
end function render_screen_diff_ansi |
| 283 |
|
| 284 |
function render_cursor_ansi(buffer) result(output) |
| 285 |
type(screen_buffer), intent(in) :: buffer |
| 286 |
character(len=:), allocatable :: output |
| 287 |
|
| 288 |
if (buffer%cursor_visible) then |
| 289 |
output = move_cursor_ansi(buffer%cursor_row, buffer%cursor_col) // show_cursor_ansi() |
| 290 |
else |
| 291 |
output = hide_cursor_ansi() |
| 292 |
end if |
| 293 |
end function render_cursor_ansi |
| 294 |
|
| 295 |
logical function screen_index_in_bounds(buffer, row, col) result(in_bounds) |
| 296 |
type(screen_buffer), intent(in) :: buffer |
| 297 |
integer, intent(in) :: row |
| 298 |
integer, intent(in) :: col |
| 299 |
|
| 300 |
in_bounds = allocated(buffer%cells) |
| 301 |
if (.not. in_bounds) return |
| 302 |
|
| 303 |
in_bounds = row >= 1 .and. row <= size(buffer%cells, 1) .and. & |
| 304 |
col >= 1 .and. col <= size(buffer%cells, 2) |
| 305 |
end function screen_index_in_bounds |
| 306 |
|
| 307 |
subroutine clamp_cursor(buffer) |
| 308 |
type(screen_buffer), intent(inout) :: buffer |
| 309 |
|
| 310 |
if (.not. allocated(buffer%cells)) then |
| 311 |
buffer%cursor_row = 1 |
| 312 |
buffer%cursor_col = 1 |
| 313 |
return |
| 314 |
end if |
| 315 |
|
| 316 |
buffer%cursor_row = max(1, min(buffer%cursor_row, size(buffer%cells, 1))) |
| 317 |
buffer%cursor_col = max(1, min(buffer%cursor_col, size(buffer%cells, 2))) |
| 318 |
end subroutine clamp_cursor |
| 319 |
|
| 320 |
logical function screen_cell_changed(previous, current, row, col) result(changed) |
| 321 |
type(screen_buffer), intent(in) :: previous |
| 322 |
type(screen_buffer), intent(in) :: current |
| 323 |
integer, intent(in) :: row |
| 324 |
integer, intent(in) :: col |
| 325 |
|
| 326 |
changed = screen_index_in_bounds(previous, row, col) .neqv. & |
| 327 |
screen_index_in_bounds(current, row, col) |
| 328 |
if (changed) return |
| 329 |
|
| 330 |
changed = .not. screen_cells_equal(screen_cell_at(previous, row, col), & |
| 331 |
screen_cell_at(current, row, col)) |
| 332 |
end function screen_cell_changed |
| 333 |
|
| 334 |
function screen_cell_at(buffer, row, col) result(cell) |
| 335 |
type(screen_buffer), intent(in) :: buffer |
| 336 |
integer, intent(in) :: row |
| 337 |
integer, intent(in) :: col |
| 338 |
type(screen_cell) :: cell |
| 339 |
|
| 340 |
cell = clear_screen_cell() |
| 341 |
if (.not. screen_index_in_bounds(buffer, row, col)) return |
| 342 |
cell = buffer%cells(row, col) |
| 343 |
end function screen_cell_at |
| 344 |
|
| 345 |
logical function screen_cells_equal(left, right) result(equal) |
| 346 |
type(screen_cell), intent(in) :: left |
| 347 |
type(screen_cell), intent(in) :: right |
| 348 |
|
| 349 |
equal = left%glyph == right%glyph .and. screen_styles_equal(left%style, right%style) |
| 350 |
end function screen_cells_equal |
| 351 |
|
| 352 |
logical function screen_styles_equal(left, right) result(equal) |
| 353 |
type(screen_style), intent(in) :: left |
| 354 |
type(screen_style), intent(in) :: right |
| 355 |
|
| 356 |
equal = left%fg == right%fg .and. & |
| 357 |
left%bg == right%bg .and. & |
| 358 |
left%bold .eqv. right%bold .and. & |
| 359 |
left%dim .eqv. right%dim .and. & |
| 360 |
left%italic .eqv. right%italic .and. & |
| 361 |
left%underline .eqv. right%underline .and. & |
| 362 |
left%inverse .eqv. right%inverse |
| 363 |
end function screen_styles_equal |
| 364 |
|
| 365 |
logical function screen_sizes_equal(left, right) result(equal) |
| 366 |
type(screen_size), intent(in) :: left |
| 367 |
type(screen_size), intent(in) :: right |
| 368 |
|
| 369 |
equal = left%width == right%width .and. left%height == right%height |
| 370 |
end function screen_sizes_equal |
| 371 |
|
| 372 |
subroutine record_damage(damage, row, col) |
| 373 |
type(screen_damage), intent(inout) :: damage |
| 374 |
integer, intent(in) :: row |
| 375 |
integer, intent(in) :: col |
| 376 |
|
| 377 |
if (.not. damage%active) then |
| 378 |
damage%active = .true. |
| 379 |
damage%row_first = row |
| 380 |
damage%row_last = row |
| 381 |
damage%col_first = col |
| 382 |
damage%col_last = col |
| 383 |
else |
| 384 |
damage%row_first = min(damage%row_first, row) |
| 385 |
damage%row_last = max(damage%row_last, row) |
| 386 |
damage%col_first = min(damage%col_first, col) |
| 387 |
damage%col_last = max(damage%col_last, col) |
| 388 |
end if |
| 389 |
|
| 390 |
damage%changed_cells = damage%changed_cells + 1 |
| 391 |
end subroutine record_damage |
| 392 |
|
| 393 |
function render_current_row_ansi(buffer, row, col_first, col_last) result(output) |
| 394 |
type(screen_buffer), intent(in) :: buffer |
| 395 |
integer, intent(in) :: row |
| 396 |
integer, intent(in) :: col_first |
| 397 |
integer, intent(in) :: col_last |
| 398 |
character(len=:), allocatable :: output |
| 399 |
type(screen_cell) :: cell |
| 400 |
character(len=:), allocatable :: current_key |
| 401 |
character(len=:), allocatable :: cell_key |
| 402 |
integer :: col |
| 403 |
|
| 404 |
output = "" |
| 405 |
current_key = "" |
| 406 |
|
| 407 |
do col = col_first, col_last |
| 408 |
cell = buffer%cells(row, col) |
| 409 |
cell_key = style_key(cell%style) |
| 410 |
if (cell_key /= current_key) then |
| 411 |
if (len(cell_key) > 0) then |
| 412 |
output = output // style_ansi(cell%style) |
| 413 |
else if (len(current_key) > 0) then |
| 414 |
output = output // reset_style_ansi() |
| 415 |
end if |
| 416 |
current_key = cell_key |
| 417 |
end if |
| 418 |
output = output // renderable_glyph(cell%glyph) |
| 419 |
end do |
| 420 |
|
| 421 |
if (len(current_key) > 0) then |
| 422 |
output = output // reset_style_ansi() |
| 423 |
end if |
| 424 |
end function render_current_row_ansi |
| 425 |
|
| 426 |
function render_diff_row_ansi(previous, current, row, col_first, col_last) result(output) |
| 427 |
type(screen_buffer), intent(in) :: previous |
| 428 |
type(screen_buffer), intent(in) :: current |
| 429 |
integer, intent(in) :: row |
| 430 |
integer, intent(in) :: col_first |
| 431 |
integer, intent(in) :: col_last |
| 432 |
character(len=:), allocatable :: output |
| 433 |
type(screen_cell) :: cell |
| 434 |
character(len=:), allocatable :: current_key |
| 435 |
character(len=:), allocatable :: cell_key |
| 436 |
integer :: col |
| 437 |
|
| 438 |
output = "" |
| 439 |
current_key = "" |
| 440 |
|
| 441 |
do col = col_first, col_last |
| 442 |
cell = screen_cell_for_diff(previous, current, row, col) |
| 443 |
cell_key = style_key(cell%style) |
| 444 |
if (cell_key /= current_key) then |
| 445 |
if (len(cell_key) > 0) then |
| 446 |
output = output // style_ansi(cell%style) |
| 447 |
else if (len(current_key) > 0) then |
| 448 |
output = output // reset_style_ansi() |
| 449 |
end if |
| 450 |
current_key = cell_key |
| 451 |
end if |
| 452 |
output = output // renderable_glyph(cell%glyph) |
| 453 |
end do |
| 454 |
|
| 455 |
if (len(current_key) > 0) then |
| 456 |
output = output // reset_style_ansi() |
| 457 |
end if |
| 458 |
end function render_diff_row_ansi |
| 459 |
|
| 460 |
function screen_cell_for_diff(previous, current, row, col) result(cell) |
| 461 |
type(screen_buffer), intent(in) :: previous |
| 462 |
type(screen_buffer), intent(in) :: current |
| 463 |
integer, intent(in) :: row |
| 464 |
integer, intent(in) :: col |
| 465 |
type(screen_cell) :: cell |
| 466 |
|
| 467 |
cell = clear_screen_cell() |
| 468 |
if (screen_index_in_bounds(current, row, col)) then |
| 469 |
cell = current%cells(row, col) |
| 470 |
return |
| 471 |
end if |
| 472 |
|
| 473 |
if (screen_index_in_bounds(previous, row, col)) then |
| 474 |
cell = clear_screen_cell() |
| 475 |
end if |
| 476 |
end function screen_cell_for_diff |
| 477 |
|
| 478 |
logical function style_is_default(style) result(is_default) |
| 479 |
type(screen_style), intent(in) :: style |
| 480 |
|
| 481 |
is_default = style%fg < 0 .and. style%bg < 0 .and. & |
| 482 |
(.not. style%bold) .and. (.not. style%dim) .and. & |
| 483 |
(.not. style%italic) .and. (.not. style%underline) .and. & |
| 484 |
(.not. style%inverse) |
| 485 |
end function style_is_default |
| 486 |
|
| 487 |
function style_key(style) result(key) |
| 488 |
type(screen_style), intent(in) :: style |
| 489 |
character(len=:), allocatable :: key |
| 490 |
|
| 491 |
if (style_is_default(style)) then |
| 492 |
key = "" |
| 493 |
return |
| 494 |
end if |
| 495 |
|
| 496 |
key = integer_text(style%fg) // ":" // integer_text(style%bg) // ":" // & |
| 497 |
merge("1", "0", style%bold) // ":" // merge("1", "0", style%dim) // ":" // & |
| 498 |
merge("1", "0", style%italic) // ":" // merge("1", "0", style%underline) // ":" // & |
| 499 |
merge("1", "0", style%inverse) |
| 500 |
end function style_key |
| 501 |
|
| 502 |
function style_ansi(style) result(output) |
| 503 |
type(screen_style), intent(in) :: style |
| 504 |
character(len=:), allocatable :: output |
| 505 |
|
| 506 |
output = reset_style_ansi() |
| 507 |
if (style%bold) output = output // sgr_parameter("1") |
| 508 |
if (style%dim) output = output // sgr_parameter("2") |
| 509 |
if (style%italic) output = output // sgr_parameter("3") |
| 510 |
if (style%underline) output = output // sgr_parameter("4") |
| 511 |
if (style%inverse) output = output // sgr_parameter("7") |
| 512 |
if (style%fg >= 0) output = output // sgr_parameter("38;5;" // integer_text(style%fg)) |
| 513 |
if (style%bg >= 0) output = output // sgr_parameter("48;5;" // integer_text(style%bg)) |
| 514 |
end function style_ansi |
| 515 |
|
| 516 |
function sgr_parameter(parameter) result(output) |
| 517 |
character(len=*), intent(in) :: parameter |
| 518 |
character(len=:), allocatable :: output |
| 519 |
|
| 520 |
output = csi() // parameter // "m" |
| 521 |
end function sgr_parameter |
| 522 |
|
| 523 |
function reset_style_ansi() result(output) |
| 524 |
character(len=:), allocatable :: output |
| 525 |
|
| 526 |
output = csi() // "0m" |
| 527 |
end function reset_style_ansi |
| 528 |
|
| 529 |
function clear_screen_ansi() result(output) |
| 530 |
character(len=:), allocatable :: output |
| 531 |
|
| 532 |
output = csi() // "2J" // csi() // "H" |
| 533 |
end function clear_screen_ansi |
| 534 |
|
| 535 |
function move_cursor_ansi(row, col) result(output) |
| 536 |
integer, intent(in) :: row |
| 537 |
integer, intent(in) :: col |
| 538 |
character(len=:), allocatable :: output |
| 539 |
|
| 540 |
output = csi() // integer_text(max(1, row)) // ";" // integer_text(max(1, col)) // "H" |
| 541 |
end function move_cursor_ansi |
| 542 |
|
| 543 |
function hide_cursor_ansi() result(output) |
| 544 |
character(len=:), allocatable :: output |
| 545 |
|
| 546 |
output = csi() // "?25l" |
| 547 |
end function hide_cursor_ansi |
| 548 |
|
| 549 |
function show_cursor_ansi() result(output) |
| 550 |
character(len=:), allocatable :: output |
| 551 |
|
| 552 |
output = csi() // "?25h" |
| 553 |
end function show_cursor_ansi |
| 554 |
|
| 555 |
function csi() result(output) |
| 556 |
character(len=:), allocatable :: output |
| 557 |
|
| 558 |
output = achar(27) // "[" |
| 559 |
end function csi |
| 560 |
|
| 561 |
function integer_text(value) result(text) |
| 562 |
integer, intent(in) :: value |
| 563 |
character(len=:), allocatable :: text |
| 564 |
character(len=32) :: scratch |
| 565 |
|
| 566 |
write(scratch, "(i0)") value |
| 567 |
text = trim(scratch) |
| 568 |
end function integer_text |
| 569 |
|
| 570 |
function renderable_glyph(glyph) result(output) |
| 571 |
character(len=1), intent(in) :: glyph |
| 572 |
character(len=1) :: output |
| 573 |
integer :: code |
| 574 |
|
| 575 |
code = iachar(glyph) |
| 576 |
if (code < 32 .or. code == 127) then |
| 577 |
output = "?" |
| 578 |
else |
| 579 |
output = glyph |
| 580 |
end if |
| 581 |
end function renderable_glyph |
| 582 |
|
| 583 |
end module fgof_screen |
| 584 |
|