ranger - mirror of ranger - a simple, vim-like file manager

path: root/doc/pydoc/ranger.ext.human_readable.html

	Commit message (Expand)	Author	Age	Files	Lines
*	updated pydoc	hut	2010-03-12	1	-11/+12
*	incremented version number and updated pydoc html files v1.0.3	hut	2010-02-16	1	-3/+3
*	updated pydoc documentation	hut	2010-01-13	1	-1/+13
*	moved pydoc pages to doc/pydoc	hut	2009-12-25	1	-0/+31

>67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460

# Primitives for screen control.
# Require Linux and a modern terminal.

== code

enable-screen-grid-mode:
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (flush Stdout)
    (flush Stderr)
    # switch to second screen buffer
    (write 1 Esc)
    (write 1 "[?1049h")
    #
    (clear-real-screen)
$enable-screen-grid-mode:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

enable-screen-type-mode:
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    # switch to first screen buffer
    (write 1 Esc)
    (write 1 "[?1049l")
$enable-screen-type-mode:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

real-screen-size:  # -> nrows/eax: int, ncols/ecx: int
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    # . save registers
    52/push-edx
    53/push-ebx
    56/push-esi
    57/push-edi
    #
    (_maybe-open-terminal)
    # var window-size-info/esi: (addr winsize)
    # winsize is a type from the Linux kernel. We don't care how large it is.
    81 5/subop/subtract %esp 0x40/imm32
    89/<- %esi 4/r32/esp
    # ioctl(*Terminal-file-descriptor, TIOCGWINSZ, window-size-info)
    89/<- %edx 6/r32/esi
    b9/copy-to-ecx 0x5413/imm32/TIOCGWINSZ
    8b/-> *Terminal-file-descriptor 3/r32/ebx
    e8/call syscall_ioctl/disp32
    # some bitworking to extract 2 16-bit shorts
    8b/-> *esi 0/r32/eax
    25/and-eax-with 0xffff/imm32
    8b/-> *esi 1/r32/ecx
    c1/shift 5/subop/logical-right %ecx 0x10/imm8
$real-screen-size:end:
    # . reclaim locals
    81 0/subop/add %esp 0x40/imm32
    # . restore registers
    5f/pop-to-edi
    5e/pop-to-esi
    5b/pop-to-ebx
    5a/pop-to-edx
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

clear-real-screen:
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write 1 Esc)
    (write 1 "[H")
    (write 1 Esc)
    (write 1 "[2J")
$clear-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

# row and col count from the top-left as (1, 1)
move-cursor-on-real-screen:  # row: int, column: int
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    # . save registers
    51/push-ecx
    # var buf/ecx: (stream byte 32)
    81 5/subop/subtract %esp 0x20/imm32
    68/push 0x20/imm32/size
    68/push 0/imm32/read
    68/push 0/imm32/write
    89/<- %ecx 4/r32/esp
    # construct directive in buf
    (write %ecx Esc)
    (write %ecx "[")
    (write-int32-decimal %ecx *(ebp+8))
    (write %ecx ";")
    (write-int32-decimal %ecx *(ebp+0xc))
    (write %ecx "H")
    # flush
    (write-stream 2 %ecx)
$move-cursor-on-real-screen:end:
    # . reclaim locals
    81 0/subop/add %esp 0x2c/imm32
    # . restore registers
    59/pop-to-ecx
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

print-string-to-real-screen:  # s: (addr array byte)
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write 1 *(ebp+8))
$print-string-to-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

print-slice-to-real-screen:  # s: (addr slice)
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write-slice-buffered Stdout *(ebp+8))
    (flush Stdout)
$print-slice-to-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

print-stream-to-real-screen:  # s: (addr stream byte)
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write-stream-data Stdout *(ebp+8))
    (flush Stdout)
$print-stream-to-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

# print a grapheme in utf-8 (only up to 4 bytes so far)
print-grapheme-to-real-screen:  # c: grapheme
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    # . save registers
    50/push-eax
    # var curr/eax: byte = 0
    b8/copy-to-eax 0/imm32
    # curr = *(ebp+8)
    8a/byte-> *(ebp+8) 0/r32/al
    # if (curr == 0) return
    3d/compare-eax-and 0/imm32
    74/jump-if-= $print-grapheme-to-real-screen:end/disp8
    #
    (print-byte-to-real-screen %eax)
    # curr = *(ebp+9)
    8a/byte-> *(ebp+9) 0/r32/al
    # if (curr == 0) return
    3d/compare-eax-and 0/imm32
    74/jump-if-= $print-grapheme-to-real-screen:end/disp8
    #
    (print-byte-to-real-screen %eax)
    # curr = *(ebp+10)
    8a/byte-> *(ebp+0xa) 0/r32/al
    # if (curr == 0) return
    3d/compare-eax-and 0/imm32
    74/jump-if-= $print-grapheme-to-real-screen:end/disp8
    #
    (print-byte-to-real-screen %eax)
    # curr = *(ebp+11)
    8a/byte-> *(ebp+0xb) 0/r32/al
    # if (curr == 0) return
    3d/compare-eax-and 0/imm32
    74/jump-if-= $print-grapheme-to-real-screen:end/disp8
    #
    (print-byte-to-real-screen %eax)
$print-grapheme-to-real-screen:end:
    # . restore registers
    58/pop-to-eax
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

print-byte-to-real-screen:  # c: byte
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    # . save registers
    51/push-ecx
    # var s/ecx: (addr array byte)
    ff 6/subop/push *(ebp+8)
    68/push 1/imm32/size
    89/<- %ecx 4/r32/esp
    (write 1 %ecx)
$print-byte-to-real-screen:end:
    # . reclaim locals
    81 0/subop/add %esp 8/imm32
    # . restore registers
    59/pop-to-ecx
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

print-int32-hex-to-real-screen:  # n: int
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write-int32-hex-buffered Stdout *(ebp+8))
    (flush Stdout)
$print-int32-hex-to-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

print-int32-hex-bits-to-real-screen:  # n: int, bits: int
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write-int32-hex-bits-buffered Stdout *(ebp+8) *(ebp+0xc) *(ebp+0x10))
    (flush Stdout)
$print-int32-hex-bits-to-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

print-int32-decimal-to-real-screen:  # n: int
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write-int32-decimal-buffered Stdout *(ebp+8))
    (flush Stdout)
$print-int32-decimal-to-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

write-int32-decimal-buffered:  # f: (addr buffered-file), n: int
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    # . save registers
    51/push-ecx
    # var ecx: (stream byte 16)
    81 5/subop/subtract %esp 0x10/imm32
    68/push 0x10/imm32/size
    68/push 0/imm32/read
    68/push 0/imm32/write
    89/<- %ecx 4/r32/esp
    (write-int32-decimal %ecx *(ebp+0xc))
    (write-stream-data *(ebp+8) %ecx)
$write-int32-decimal-buffered:end:
    # . reclaim locals
    81 0/subop/add %esp 0x1c/imm32
    # . restore registers
    59/pop-to-ecx
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

reset-formatting-on-real-screen:
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write 1 Esc)
    (write 1 "(B")
    (write 1 Esc)
    (write 1 "[m")
$reset-formatting-on-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

start-color-on-real-screen:  # fg: int, bg: int
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    # . save registers
    51/push-ecx
    # var buf/ecx: (stream byte 32)
    81 5/subop/subtract %esp 0x20/imm32
    68/push 0x20/imm32/size
    68/push 0/imm32/read
    68/push 0/imm32/write
    89/<- %ecx 4/r32/esp
    # construct directive in buf
    # . set fg
    (write %ecx Esc)
    (write %ecx "[38;5;")
    (write-int32-decimal %ecx *(ebp+8))
    (write %ecx "m")
    # . set bg
    (write %ecx Esc)
    (write %ecx "[48;5;")
    (write-int32-decimal %ecx *(ebp+0xc))
    (write %ecx "m")
    # flush
    (write-stream 2 %ecx)
$start-color-on-real-screen:end:
    # . reclaim locals
    81 0/subop/add %esp 0x2c/imm32
    # . restore registers
    59/pop-to-ecx
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

start-bold-on-real-screen:
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write 1 Esc)
    (write 1 "[1m")
$start-bold-on-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

start-underline-on-real-screen:
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write 1 Esc)
    (write 1 "[4m")
$start-underline-on-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

start-reverse-video-on-real-screen:
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write 1 Esc)
    (write 1 "[7m")
$start-reverse-video-on-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

# might require enabling blinking in your terminal program
start-blinking-on-real-screen:
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write 1 Esc)
    (write 1 "[5m")
$start-blinking-on-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

hide-cursor-on-real-screen:
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write 1 Esc)
    (write 1 "[?25l")
$hide-cursor-on-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

show-cursor-on-real-screen:
    # . prologue
    55/push-ebp
    89/<- %ebp 4/r32/esp
    #
    (write 1 Esc)
    (write 1 "[?12l")
    (write 1 Esc)
    (write 1 "[?25h")
$show-cursor-on-real-screen:end:
    # . epilogue
    89/<- %esp 5/r32/ebp
    5d/pop-to-ebp
    c3/return

# This is a low-level detail; I don't think everything should be a file.
#
# Open "/dev/tty" if necessary and cache its file descriptor in Terminal-file-descriptor
# where later primitives can use it.
_maybe-open-terminal:
    81 7/subop/compare *Terminal-file-descriptor -1/imm32
    75/jump-if-!= $_maybe-open-terminal:epilogue/disp8
    # . save registers
    50/push-eax
    51/push-ecx
    53/push-ebx
    # open("/dev/tty", O_RDWR)
    bb/copy-to-ebx Terminal-filename/imm32
    b9/copy-to-ecx 2/imm32/O_RDWR
    e8/call syscall_open/disp32
    89/<- *Terminal-file-descriptor 0/r32/eax
$_maybe-open-terminal:end:
    # . restore registers
    5b/pop-to-ebx
    59/pop-to-ecx
    58/pop-to-eax
$_maybe-open-terminal:epilogue:
    c3/return

== data

Terminal-file-descriptor:  # (addr int)
  -1/imm32

Esc:  # (addr array byte)
  # size
  1/imm32
  # data
  0x1b

Terminal-filename:  # (addr kernel-string)
  # "/dev/tty"
  2f/slash 64/d 65/e 76/v 2f/slash 74/t 74/t 79/y 0/nul
  # on Linux console
#?   # "/dev/console"
#?   2f/slash 64/d 65/e 76/v 2f/slash 63/c 6f/o 6e/n 73/s 6f/o 6c/l 65/e 0/nul