Spaces:
Sleeping
Sleeping
File size: 13,419 Bytes
2d876d1 |
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 |
from __future__ import annotations
from typing import Callable, Iterable, Sequence
from prompt_toolkit.application.current import get_app
from prompt_toolkit.filters import Condition
from prompt_toolkit.formatted_text.base import OneStyleAndTextTuple, StyleAndTextTuples
from prompt_toolkit.key_binding.key_bindings import KeyBindings, KeyBindingsBase
from prompt_toolkit.key_binding.key_processor import KeyPressEvent
from prompt_toolkit.keys import Keys
from prompt_toolkit.layout.containers import (
AnyContainer,
ConditionalContainer,
Container,
Float,
FloatContainer,
HSplit,
Window,
)
from prompt_toolkit.layout.controls import FormattedTextControl
from prompt_toolkit.mouse_events import MouseEvent, MouseEventType
from prompt_toolkit.utils import get_cwidth
from prompt_toolkit.widgets import Shadow
from .base import Border
__all__ = [
"MenuContainer",
"MenuItem",
]
E = KeyPressEvent
class MenuContainer:
"""
:param floats: List of extra Float objects to display.
:param menu_items: List of `MenuItem` objects.
"""
def __init__(
self,
body: AnyContainer,
menu_items: list[MenuItem],
floats: list[Float] | None = None,
key_bindings: KeyBindingsBase | None = None,
) -> None:
self.body = body
self.menu_items = menu_items
self.selected_menu = [0]
# Key bindings.
kb = KeyBindings()
@Condition
def in_main_menu() -> bool:
return len(self.selected_menu) == 1
@Condition
def in_sub_menu() -> bool:
return len(self.selected_menu) > 1
# Navigation through the main menu.
@kb.add("left", filter=in_main_menu)
def _left(event: E) -> None:
self.selected_menu[0] = max(0, self.selected_menu[0] - 1)
@kb.add("right", filter=in_main_menu)
def _right(event: E) -> None:
self.selected_menu[0] = min(
len(self.menu_items) - 1, self.selected_menu[0] + 1
)
@kb.add("down", filter=in_main_menu)
def _down(event: E) -> None:
self.selected_menu.append(0)
@kb.add("c-c", filter=in_main_menu)
@kb.add("c-g", filter=in_main_menu)
def _cancel(event: E) -> None:
"Leave menu."
event.app.layout.focus_last()
# Sub menu navigation.
@kb.add("left", filter=in_sub_menu)
@kb.add("c-g", filter=in_sub_menu)
@kb.add("c-c", filter=in_sub_menu)
def _back(event: E) -> None:
"Go back to parent menu."
if len(self.selected_menu) > 1:
self.selected_menu.pop()
@kb.add("right", filter=in_sub_menu)
def _submenu(event: E) -> None:
"go into sub menu."
if self._get_menu(len(self.selected_menu) - 1).children:
self.selected_menu.append(0)
# If This item does not have a sub menu. Go up in the parent menu.
elif (
len(self.selected_menu) == 2
and self.selected_menu[0] < len(self.menu_items) - 1
):
self.selected_menu = [
min(len(self.menu_items) - 1, self.selected_menu[0] + 1)
]
if self.menu_items[self.selected_menu[0]].children:
self.selected_menu.append(0)
@kb.add("up", filter=in_sub_menu)
def _up_in_submenu(event: E) -> None:
"Select previous (enabled) menu item or return to main menu."
# Look for previous enabled items in this sub menu.
menu = self._get_menu(len(self.selected_menu) - 2)
index = self.selected_menu[-1]
previous_indexes = [
i
for i, item in enumerate(menu.children)
if i < index and not item.disabled
]
if previous_indexes:
self.selected_menu[-1] = previous_indexes[-1]
elif len(self.selected_menu) == 2:
# Return to main menu.
self.selected_menu.pop()
@kb.add("down", filter=in_sub_menu)
def _down_in_submenu(event: E) -> None:
"Select next (enabled) menu item."
menu = self._get_menu(len(self.selected_menu) - 2)
index = self.selected_menu[-1]
next_indexes = [
i
for i, item in enumerate(menu.children)
if i > index and not item.disabled
]
if next_indexes:
self.selected_menu[-1] = next_indexes[0]
@kb.add("enter")
def _click(event: E) -> None:
"Click the selected menu item."
item = self._get_menu(len(self.selected_menu) - 1)
if item.handler:
event.app.layout.focus_last()
item.handler()
# Controls.
self.control = FormattedTextControl(
self._get_menu_fragments, key_bindings=kb, focusable=True, show_cursor=False
)
self.window = Window(height=1, content=self.control, style="class:menu-bar")
submenu = self._submenu(0)
submenu2 = self._submenu(1)
submenu3 = self._submenu(2)
@Condition
def has_focus() -> bool:
return get_app().layout.current_window == self.window
self.container = FloatContainer(
content=HSplit(
[
# The titlebar.
self.window,
# The 'body', like defined above.
body,
]
),
floats=[
Float(
xcursor=True,
ycursor=True,
content=ConditionalContainer(
content=Shadow(body=submenu), filter=has_focus
),
),
Float(
attach_to_window=submenu,
xcursor=True,
ycursor=True,
allow_cover_cursor=True,
content=ConditionalContainer(
content=Shadow(body=submenu2),
filter=has_focus
& Condition(lambda: len(self.selected_menu) >= 1),
),
),
Float(
attach_to_window=submenu2,
xcursor=True,
ycursor=True,
allow_cover_cursor=True,
content=ConditionalContainer(
content=Shadow(body=submenu3),
filter=has_focus
& Condition(lambda: len(self.selected_menu) >= 2),
),
),
# --
]
+ (floats or []),
key_bindings=key_bindings,
)
def _get_menu(self, level: int) -> MenuItem:
menu = self.menu_items[self.selected_menu[0]]
for i, index in enumerate(self.selected_menu[1:]):
if i < level:
try:
menu = menu.children[index]
except IndexError:
return MenuItem("debug")
return menu
def _get_menu_fragments(self) -> StyleAndTextTuples:
focused = get_app().layout.has_focus(self.window)
# This is called during the rendering. When we discover that this
# widget doesn't have the focus anymore. Reset menu state.
if not focused:
self.selected_menu = [0]
# Generate text fragments for the main menu.
def one_item(i: int, item: MenuItem) -> Iterable[OneStyleAndTextTuple]:
def mouse_handler(mouse_event: MouseEvent) -> None:
hover = mouse_event.event_type == MouseEventType.MOUSE_MOVE
if (
mouse_event.event_type == MouseEventType.MOUSE_DOWN
or hover
and focused
):
# Toggle focus.
app = get_app()
if not hover:
if app.layout.has_focus(self.window):
if self.selected_menu == [i]:
app.layout.focus_last()
else:
app.layout.focus(self.window)
self.selected_menu = [i]
yield ("class:menu-bar", " ", mouse_handler)
if i == self.selected_menu[0] and focused:
yield ("[SetMenuPosition]", "", mouse_handler)
style = "class:menu-bar.selected-item"
else:
style = "class:menu-bar"
yield style, item.text, mouse_handler
result: StyleAndTextTuples = []
for i, item in enumerate(self.menu_items):
result.extend(one_item(i, item))
return result
def _submenu(self, level: int = 0) -> Window:
def get_text_fragments() -> StyleAndTextTuples:
result: StyleAndTextTuples = []
if level < len(self.selected_menu):
menu = self._get_menu(level)
if menu.children:
result.append(("class:menu", Border.TOP_LEFT))
result.append(("class:menu", Border.HORIZONTAL * (menu.width + 4)))
result.append(("class:menu", Border.TOP_RIGHT))
result.append(("", "\n"))
try:
selected_item = self.selected_menu[level + 1]
except IndexError:
selected_item = -1
def one_item(
i: int, item: MenuItem
) -> Iterable[OneStyleAndTextTuple]:
def mouse_handler(mouse_event: MouseEvent) -> None:
if item.disabled:
# The arrow keys can't interact with menu items that are disabled.
# The mouse shouldn't be able to either.
return
hover = mouse_event.event_type == MouseEventType.MOUSE_MOVE
if (
mouse_event.event_type == MouseEventType.MOUSE_UP
or hover
):
app = get_app()
if not hover and item.handler:
app.layout.focus_last()
item.handler()
else:
self.selected_menu = self.selected_menu[
: level + 1
] + [i]
if i == selected_item:
yield ("[SetCursorPosition]", "")
style = "class:menu-bar.selected-item"
else:
style = ""
yield ("class:menu", Border.VERTICAL)
if item.text == "-":
yield (
style + "class:menu-border",
f"{Border.HORIZONTAL * (menu.width + 3)}",
mouse_handler,
)
else:
yield (
style,
f" {item.text}".ljust(menu.width + 3),
mouse_handler,
)
if item.children:
yield (style, ">", mouse_handler)
else:
yield (style, " ", mouse_handler)
if i == selected_item:
yield ("[SetMenuPosition]", "")
yield ("class:menu", Border.VERTICAL)
yield ("", "\n")
for i, item in enumerate(menu.children):
result.extend(one_item(i, item))
result.append(("class:menu", Border.BOTTOM_LEFT))
result.append(("class:menu", Border.HORIZONTAL * (menu.width + 4)))
result.append(("class:menu", Border.BOTTOM_RIGHT))
return result
return Window(FormattedTextControl(get_text_fragments), style="class:menu")
@property
def floats(self) -> list[Float] | None:
return self.container.floats
def __pt_container__(self) -> Container:
return self.container
class MenuItem:
def __init__(
self,
text: str = "",
handler: Callable[[], None] | None = None,
children: list[MenuItem] | None = None,
shortcut: Sequence[Keys | str] | None = None,
disabled: bool = False,
) -> None:
self.text = text
self.handler = handler
self.children = children or []
self.shortcut = shortcut
self.disabled = disabled
self.selected_item = 0
@property
def width(self) -> int:
if self.children:
return max(get_cwidth(c.text) for c in self.children)
else:
return 0
|