/usr/lib/python2.7/dist-packages/twisted/conch/insults/window.py is in python-twisted-conch 1:13.2.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 | # -*- test-case-name: twisted.conch.test.test_window -*-
"""
Simple insults-based widget library
@author: Jp Calderone
"""
import array
from twisted.conch.insults import insults, helper
from twisted.python import text as tptext
class YieldFocus(Exception):
"""Input focus manipulation exception
"""
class BoundedTerminalWrapper(object):
def __init__(self, terminal, width, height, xoff, yoff):
self.width = width
self.height = height
self.xoff = xoff
self.yoff = yoff
self.terminal = terminal
self.cursorForward = terminal.cursorForward
self.selectCharacterSet = terminal.selectCharacterSet
self.selectGraphicRendition = terminal.selectGraphicRendition
self.saveCursor = terminal.saveCursor
self.restoreCursor = terminal.restoreCursor
def cursorPosition(self, x, y):
return self.terminal.cursorPosition(
self.xoff + min(self.width, x),
self.yoff + min(self.height, y)
)
def cursorHome(self):
return self.terminal.cursorPosition(
self.xoff, self.yoff)
def write(self, bytes):
return self.terminal.write(bytes)
class Widget(object):
focused = False
parent = None
dirty = False
width = height = None
def repaint(self):
if not self.dirty:
self.dirty = True
if self.parent is not None and not self.parent.dirty:
self.parent.repaint()
def filthy(self):
self.dirty = True
def redraw(self, width, height, terminal):
self.filthy()
self.draw(width, height, terminal)
def draw(self, width, height, terminal):
if width != self.width or height != self.height or self.dirty:
self.width = width
self.height = height
self.dirty = False
self.render(width, height, terminal)
def render(self, width, height, terminal):
pass
def sizeHint(self):
return None
def keystrokeReceived(self, keyID, modifier):
if keyID == '\t':
self.tabReceived(modifier)
elif keyID == '\x7f':
self.backspaceReceived()
elif keyID in insults.FUNCTION_KEYS:
self.functionKeyReceived(keyID, modifier)
else:
self.characterReceived(keyID, modifier)
def tabReceived(self, modifier):
# XXX TODO - Handle shift+tab
raise YieldFocus()
def focusReceived(self):
"""Called when focus is being given to this widget.
May raise YieldFocus is this widget does not want focus.
"""
self.focused = True
self.repaint()
def focusLost(self):
self.focused = False
self.repaint()
def backspaceReceived(self):
pass
def functionKeyReceived(self, keyID, modifier):
func = getattr(self, 'func_' + keyID.name, None)
if func is not None:
func(modifier)
def characterReceived(self, keyID, modifier):
pass
class ContainerWidget(Widget):
"""
@ivar focusedChild: The contained widget which currently has
focus, or None.
"""
focusedChild = None
focused = False
def __init__(self):
Widget.__init__(self)
self.children = []
def addChild(self, child):
assert child.parent is None
child.parent = self
self.children.append(child)
if self.focusedChild is None and self.focused:
try:
child.focusReceived()
except YieldFocus:
pass
else:
self.focusedChild = child
self.repaint()
def remChild(self, child):
assert child.parent is self
child.parent = None
self.children.remove(child)
self.repaint()
def filthy(self):
for ch in self.children:
ch.filthy()
Widget.filthy(self)
def render(self, width, height, terminal):
for ch in self.children:
ch.draw(width, height, terminal)
def changeFocus(self):
self.repaint()
if self.focusedChild is not None:
self.focusedChild.focusLost()
focusedChild = self.focusedChild
self.focusedChild = None
try:
curFocus = self.children.index(focusedChild) + 1
except ValueError:
raise YieldFocus()
else:
curFocus = 0
while curFocus < len(self.children):
try:
self.children[curFocus].focusReceived()
except YieldFocus:
curFocus += 1
else:
self.focusedChild = self.children[curFocus]
return
# None of our children wanted focus
raise YieldFocus()
def focusReceived(self):
self.changeFocus()
self.focused = True
def keystrokeReceived(self, keyID, modifier):
if self.focusedChild is not None:
try:
self.focusedChild.keystrokeReceived(keyID, modifier)
except YieldFocus:
self.changeFocus()
self.repaint()
else:
Widget.keystrokeReceived(self, keyID, modifier)
class TopWindow(ContainerWidget):
"""
A top-level container object which provides focus wrap-around and paint
scheduling.
@ivar painter: A no-argument callable which will be invoked when this
widget needs to be redrawn.
@ivar scheduler: A one-argument callable which will be invoked with a
no-argument callable and should arrange for it to invoked at some point in
the near future. The no-argument callable will cause this widget and all
its children to be redrawn. It is typically beneficial for the no-argument
callable to be invoked at the end of handling for whatever event is
currently active; for example, it might make sense to call it at the end of
L{twisted.conch.insults.insults.ITerminalProtocol.keystrokeReceived}.
Note, however, that since calls to this may also be made in response to no
apparent event, arrangements should be made for the function to be called
even if an event handler such as C{keystrokeReceived} is not on the call
stack (eg, using C{reactor.callLater} with a short timeout).
"""
focused = True
def __init__(self, painter, scheduler):
ContainerWidget.__init__(self)
self.painter = painter
self.scheduler = scheduler
_paintCall = None
def repaint(self):
if self._paintCall is None:
self._paintCall = object()
self.scheduler(self._paint)
ContainerWidget.repaint(self)
def _paint(self):
self._paintCall = None
self.painter()
def changeFocus(self):
try:
ContainerWidget.changeFocus(self)
except YieldFocus:
try:
ContainerWidget.changeFocus(self)
except YieldFocus:
pass
def keystrokeReceived(self, keyID, modifier):
try:
ContainerWidget.keystrokeReceived(self, keyID, modifier)
except YieldFocus:
self.changeFocus()
class AbsoluteBox(ContainerWidget):
def moveChild(self, child, x, y):
for n in range(len(self.children)):
if self.children[n][0] is child:
self.children[n] = (child, x, y)
break
else:
raise ValueError("No such child", child)
def render(self, width, height, terminal):
for (ch, x, y) in self.children:
wrap = BoundedTerminalWrapper(terminal, width - x, height - y, x, y)
ch.draw(width, height, wrap)
class _Box(ContainerWidget):
TOP, CENTER, BOTTOM = range(3)
def __init__(self, gravity=CENTER):
ContainerWidget.__init__(self)
self.gravity = gravity
def sizeHint(self):
height = 0
width = 0
for ch in self.children:
hint = ch.sizeHint()
if hint is None:
hint = (None, None)
if self.variableDimension == 0:
if hint[0] is None:
width = None
elif width is not None:
width += hint[0]
if hint[1] is None:
height = None
elif height is not None:
height = max(height, hint[1])
else:
if hint[0] is None:
width = None
elif width is not None:
width = max(width, hint[0])
if hint[1] is None:
height = None
elif height is not None:
height += hint[1]
return width, height
def render(self, width, height, terminal):
if not self.children:
return
greedy = 0
wants = []
for ch in self.children:
hint = ch.sizeHint()
if hint is None:
hint = (None, None)
if hint[self.variableDimension] is None:
greedy += 1
wants.append(hint[self.variableDimension])
length = (width, height)[self.variableDimension]
totalWant = sum([w for w in wants if w is not None])
if greedy:
leftForGreedy = int((length - totalWant) / greedy)
widthOffset = heightOffset = 0
for want, ch in zip(wants, self.children):
if want is None:
want = leftForGreedy
subWidth, subHeight = width, height
if self.variableDimension == 0:
subWidth = want
else:
subHeight = want
wrap = BoundedTerminalWrapper(
terminal,
subWidth,
subHeight,
widthOffset,
heightOffset,
)
ch.draw(subWidth, subHeight, wrap)
if self.variableDimension == 0:
widthOffset += want
else:
heightOffset += want
class HBox(_Box):
variableDimension = 0
class VBox(_Box):
variableDimension = 1
class Packer(ContainerWidget):
def render(self, width, height, terminal):
if not self.children:
return
root = int(len(self.children) ** 0.5 + 0.5)
boxes = [VBox() for n in range(root)]
for n, ch in enumerate(self.children):
boxes[n % len(boxes)].addChild(ch)
h = HBox()
map(h.addChild, boxes)
h.render(width, height, terminal)
class Canvas(Widget):
focused = False
contents = None
def __init__(self):
Widget.__init__(self)
self.resize(1, 1)
def resize(self, width, height):
contents = array.array('c', ' ' * width * height)
if self.contents is not None:
for x in range(min(width, self._width)):
for y in range(min(height, self._height)):
contents[width * y + x] = self[x, y]
self.contents = contents
self._width = width
self._height = height
if self.x >= width:
self.x = width - 1
if self.y >= height:
self.y = height - 1
def __getitem__(self, (x, y)):
return self.contents[(self._width * y) + x]
def __setitem__(self, (x, y), value):
self.contents[(self._width * y) + x] = value
def clear(self):
self.contents = array.array('c', ' ' * len(self.contents))
def render(self, width, height, terminal):
if not width or not height:
return
if width != self._width or height != self._height:
self.resize(width, height)
for i in range(height):
terminal.cursorPosition(0, i)
terminal.write(''.join(self.contents[self._width * i:self._width * i + self._width])[:width])
def horizontalLine(terminal, y, left, right):
terminal.selectCharacterSet(insults.CS_DRAWING, insults.G0)
terminal.cursorPosition(left, y)
terminal.write(chr(0161) * (right - left))
terminal.selectCharacterSet(insults.CS_US, insults.G0)
def verticalLine(terminal, x, top, bottom):
terminal.selectCharacterSet(insults.CS_DRAWING, insults.G0)
for n in xrange(top, bottom):
terminal.cursorPosition(x, n)
terminal.write(chr(0170))
terminal.selectCharacterSet(insults.CS_US, insults.G0)
def rectangle(terminal, (top, left), (width, height)):
terminal.selectCharacterSet(insults.CS_DRAWING, insults.G0)
terminal.cursorPosition(top, left)
terminal.write(chr(0154))
terminal.write(chr(0161) * (width - 2))
terminal.write(chr(0153))
for n in range(height - 2):
terminal.cursorPosition(left, top + n + 1)
terminal.write(chr(0170))
terminal.cursorForward(width - 2)
terminal.write(chr(0170))
terminal.cursorPosition(0, top + height - 1)
terminal.write(chr(0155))
terminal.write(chr(0161) * (width - 2))
terminal.write(chr(0152))
terminal.selectCharacterSet(insults.CS_US, insults.G0)
class Border(Widget):
def __init__(self, containee):
Widget.__init__(self)
self.containee = containee
self.containee.parent = self
def focusReceived(self):
return self.containee.focusReceived()
def focusLost(self):
return self.containee.focusLost()
def keystrokeReceived(self, keyID, modifier):
return self.containee.keystrokeReceived(keyID, modifier)
def sizeHint(self):
hint = self.containee.sizeHint()
if hint is None:
hint = (None, None)
if hint[0] is None:
x = None
else:
x = hint[0] + 2
if hint[1] is None:
y = None
else:
y = hint[1] + 2
return x, y
def filthy(self):
self.containee.filthy()
Widget.filthy(self)
def render(self, width, height, terminal):
if self.containee.focused:
terminal.write('\x1b[31m')
rectangle(terminal, (0, 0), (width, height))
terminal.write('\x1b[0m')
wrap = BoundedTerminalWrapper(terminal, width - 2, height - 2, 1, 1)
self.containee.draw(width - 2, height - 2, wrap)
class Button(Widget):
def __init__(self, label, onPress):
Widget.__init__(self)
self.label = label
self.onPress = onPress
def sizeHint(self):
return len(self.label), 1
def characterReceived(self, keyID, modifier):
if keyID == '\r':
self.onPress()
def render(self, width, height, terminal):
terminal.cursorPosition(0, 0)
if self.focused:
terminal.write('\x1b[1m' + self.label + '\x1b[0m')
else:
terminal.write(self.label)
class TextInput(Widget):
def __init__(self, maxwidth, onSubmit):
Widget.__init__(self)
self.onSubmit = onSubmit
self.maxwidth = maxwidth
self.buffer = ''
self.cursor = 0
def setText(self, text):
self.buffer = text[:self.maxwidth]
self.cursor = len(self.buffer)
self.repaint()
def func_LEFT_ARROW(self, modifier):
if self.cursor > 0:
self.cursor -= 1
self.repaint()
def func_RIGHT_ARROW(self, modifier):
if self.cursor < len(self.buffer):
self.cursor += 1
self.repaint()
def backspaceReceived(self):
if self.cursor > 0:
self.buffer = self.buffer[:self.cursor - 1] + self.buffer[self.cursor:]
self.cursor -= 1
self.repaint()
def characterReceived(self, keyID, modifier):
if keyID == '\r':
self.onSubmit(self.buffer)
else:
if len(self.buffer) < self.maxwidth:
self.buffer = self.buffer[:self.cursor] + keyID + self.buffer[self.cursor:]
self.cursor += 1
self.repaint()
def sizeHint(self):
return self.maxwidth + 1, 1
def render(self, width, height, terminal):
currentText = self._renderText()
terminal.cursorPosition(0, 0)
if self.focused:
terminal.write(currentText[:self.cursor])
cursor(terminal, currentText[self.cursor:self.cursor+1] or ' ')
terminal.write(currentText[self.cursor+1:])
terminal.write(' ' * (self.maxwidth - len(currentText) + 1))
else:
more = self.maxwidth - len(currentText)
terminal.write(currentText + '_' * more)
def _renderText(self):
return self.buffer
class PasswordInput(TextInput):
def _renderText(self):
return '*' * len(self.buffer)
class TextOutput(Widget):
text = ''
def __init__(self, size=None):
Widget.__init__(self)
self.size = size
def sizeHint(self):
return self.size
def render(self, width, height, terminal):
terminal.cursorPosition(0, 0)
text = self.text[:width]
terminal.write(text + ' ' * (width - len(text)))
def setText(self, text):
self.text = text
self.repaint()
def focusReceived(self):
raise YieldFocus()
class TextOutputArea(TextOutput):
WRAP, TRUNCATE = range(2)
def __init__(self, size=None, longLines=WRAP):
TextOutput.__init__(self, size)
self.longLines = longLines
def render(self, width, height, terminal):
n = 0
inputLines = self.text.splitlines()
outputLines = []
while inputLines:
if self.longLines == self.WRAP:
wrappedLines = tptext.greedyWrap(inputLines.pop(0), width)
outputLines.extend(wrappedLines or [''])
else:
outputLines.append(inputLines.pop(0)[:width])
if len(outputLines) >= height:
break
for n, L in enumerate(outputLines[:height]):
terminal.cursorPosition(0, n)
terminal.write(L)
class Viewport(Widget):
_xOffset = 0
_yOffset = 0
def xOffset():
def get(self):
return self._xOffset
def set(self, value):
if self._xOffset != value:
self._xOffset = value
self.repaint()
return get, set
xOffset = property(*xOffset())
def yOffset():
def get(self):
return self._yOffset
def set(self, value):
if self._yOffset != value:
self._yOffset = value
self.repaint()
return get, set
yOffset = property(*yOffset())
_width = 160
_height = 24
def __init__(self, containee):
Widget.__init__(self)
self.containee = containee
self.containee.parent = self
self._buf = helper.TerminalBuffer()
self._buf.width = self._width
self._buf.height = self._height
self._buf.connectionMade()
def filthy(self):
self.containee.filthy()
Widget.filthy(self)
def render(self, width, height, terminal):
self.containee.draw(self._width, self._height, self._buf)
# XXX /Lame/
for y, line in enumerate(self._buf.lines[self._yOffset:self._yOffset + height]):
terminal.cursorPosition(0, y)
n = 0
for n, (ch, attr) in enumerate(line[self._xOffset:self._xOffset + width]):
if ch is self._buf.void:
ch = ' '
terminal.write(ch)
if n < width:
terminal.write(' ' * (width - n - 1))
class _Scrollbar(Widget):
def __init__(self, onScroll):
Widget.__init__(self)
self.onScroll = onScroll
self.percent = 0.0
def smaller(self):
self.percent = min(1.0, max(0.0, self.onScroll(-1)))
self.repaint()
def bigger(self):
self.percent = min(1.0, max(0.0, self.onScroll(+1)))
self.repaint()
class HorizontalScrollbar(_Scrollbar):
def sizeHint(self):
return (None, 1)
def func_LEFT_ARROW(self, modifier):
self.smaller()
def func_RIGHT_ARROW(self, modifier):
self.bigger()
_left = u'\N{BLACK LEFT-POINTING TRIANGLE}'
_right = u'\N{BLACK RIGHT-POINTING TRIANGLE}'
_bar = u'\N{LIGHT SHADE}'
_slider = u'\N{DARK SHADE}'
def render(self, width, height, terminal):
terminal.cursorPosition(0, 0)
n = width - 3
before = int(n * self.percent)
after = n - before
me = self._left + (self._bar * before) + self._slider + (self._bar * after) + self._right
terminal.write(me.encode('utf-8'))
class VerticalScrollbar(_Scrollbar):
def sizeHint(self):
return (1, None)
def func_UP_ARROW(self, modifier):
self.smaller()
def func_DOWN_ARROW(self, modifier):
self.bigger()
_up = u'\N{BLACK UP-POINTING TRIANGLE}'
_down = u'\N{BLACK DOWN-POINTING TRIANGLE}'
_bar = u'\N{LIGHT SHADE}'
_slider = u'\N{DARK SHADE}'
def render(self, width, height, terminal):
terminal.cursorPosition(0, 0)
knob = int(self.percent * (height - 2))
terminal.write(self._up.encode('utf-8'))
for i in xrange(1, height - 1):
terminal.cursorPosition(0, i)
if i != (knob + 1):
terminal.write(self._bar.encode('utf-8'))
else:
terminal.write(self._slider.encode('utf-8'))
terminal.cursorPosition(0, height - 1)
terminal.write(self._down.encode('utf-8'))
class ScrolledArea(Widget):
"""
A L{ScrolledArea} contains another widget wrapped in a viewport and
vertical and horizontal scrollbars for moving the viewport around.
"""
def __init__(self, containee):
Widget.__init__(self)
self._viewport = Viewport(containee)
self._horiz = HorizontalScrollbar(self._horizScroll)
self._vert = VerticalScrollbar(self._vertScroll)
for w in self._viewport, self._horiz, self._vert:
w.parent = self
def _horizScroll(self, n):
self._viewport.xOffset += n
self._viewport.xOffset = max(0, self._viewport.xOffset)
return self._viewport.xOffset / 25.0
def _vertScroll(self, n):
self._viewport.yOffset += n
self._viewport.yOffset = max(0, self._viewport.yOffset)
return self._viewport.yOffset / 25.0
def func_UP_ARROW(self, modifier):
self._vert.smaller()
def func_DOWN_ARROW(self, modifier):
self._vert.bigger()
def func_LEFT_ARROW(self, modifier):
self._horiz.smaller()
def func_RIGHT_ARROW(self, modifier):
self._horiz.bigger()
def filthy(self):
self._viewport.filthy()
self._horiz.filthy()
self._vert.filthy()
Widget.filthy(self)
def render(self, width, height, terminal):
wrapper = BoundedTerminalWrapper(terminal, width - 2, height - 2, 1, 1)
self._viewport.draw(width - 2, height - 2, wrapper)
if self.focused:
terminal.write('\x1b[31m')
horizontalLine(terminal, 0, 1, width - 1)
verticalLine(terminal, 0, 1, height - 1)
self._vert.draw(1, height - 1, BoundedTerminalWrapper(terminal, 1, height - 1, width - 1, 0))
self._horiz.draw(width, 1, BoundedTerminalWrapper(terminal, width, 1, 0, height - 1))
terminal.write('\x1b[0m')
def cursor(terminal, ch):
terminal.saveCursor()
terminal.selectGraphicRendition(str(insults.REVERSE_VIDEO))
terminal.write(ch)
terminal.restoreCursor()
terminal.cursorForward()
class Selection(Widget):
# Index into the sequence
focusedIndex = 0
# Offset into the displayed subset of the sequence
renderOffset = 0
def __init__(self, sequence, onSelect, minVisible=None):
Widget.__init__(self)
self.sequence = sequence
self.onSelect = onSelect
self.minVisible = minVisible
if minVisible is not None:
self._width = max(map(len, self.sequence))
def sizeHint(self):
if self.minVisible is not None:
return self._width, self.minVisible
def func_UP_ARROW(self, modifier):
if self.focusedIndex > 0:
self.focusedIndex -= 1
if self.renderOffset > 0:
self.renderOffset -= 1
self.repaint()
def func_PGUP(self, modifier):
if self.renderOffset != 0:
self.focusedIndex -= self.renderOffset
self.renderOffset = 0
else:
self.focusedIndex = max(0, self.focusedIndex - self.height)
self.repaint()
def func_DOWN_ARROW(self, modifier):
if self.focusedIndex < len(self.sequence) - 1:
self.focusedIndex += 1
if self.renderOffset < self.height - 1:
self.renderOffset += 1
self.repaint()
def func_PGDN(self, modifier):
if self.renderOffset != self.height - 1:
change = self.height - self.renderOffset - 1
if change + self.focusedIndex >= len(self.sequence):
change = len(self.sequence) - self.focusedIndex - 1
self.focusedIndex += change
self.renderOffset = self.height - 1
else:
self.focusedIndex = min(len(self.sequence) - 1, self.focusedIndex + self.height)
self.repaint()
def characterReceived(self, keyID, modifier):
if keyID == '\r':
self.onSelect(self.sequence[self.focusedIndex])
def render(self, width, height, terminal):
self.height = height
start = self.focusedIndex - self.renderOffset
if start > len(self.sequence) - height:
start = max(0, len(self.sequence) - height)
elements = self.sequence[start:start+height]
for n, ele in enumerate(elements):
terminal.cursorPosition(0, n)
if n == self.renderOffset:
terminal.saveCursor()
if self.focused:
modes = str(insults.REVERSE_VIDEO), str(insults.BOLD)
else:
modes = str(insults.REVERSE_VIDEO),
terminal.selectGraphicRendition(*modes)
text = ele[:width]
terminal.write(text + (' ' * (width - len(text))))
if n == self.renderOffset:
terminal.restoreCursor()
|