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371 lines
12 KiB
Python
371 lines
12 KiB
Python
from __future__ import annotations
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from typing import Any
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from prompt_toolkit.application.current import get_app
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from prompt_toolkit.buffer import Buffer
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from prompt_toolkit.enums import SYSTEM_BUFFER
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from prompt_toolkit.filters import (
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Condition,
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FilterOrBool,
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emacs_mode,
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has_arg,
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has_completions,
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has_focus,
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has_validation_error,
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to_filter,
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vi_mode,
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vi_navigation_mode,
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)
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from prompt_toolkit.formatted_text import (
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AnyFormattedText,
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StyleAndTextTuples,
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fragment_list_len,
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to_formatted_text,
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)
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from prompt_toolkit.key_binding.key_bindings import (
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ConditionalKeyBindings,
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KeyBindings,
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KeyBindingsBase,
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merge_key_bindings,
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)
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from prompt_toolkit.key_binding.key_processor import KeyPressEvent
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from prompt_toolkit.key_binding.vi_state import InputMode
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from prompt_toolkit.keys import Keys
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from prompt_toolkit.layout.containers import ConditionalContainer, Container, Window
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from prompt_toolkit.layout.controls import (
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BufferControl,
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FormattedTextControl,
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SearchBufferControl,
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UIContent,
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UIControl,
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)
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from prompt_toolkit.layout.dimension import Dimension
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from prompt_toolkit.layout.processors import BeforeInput
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from prompt_toolkit.lexers import SimpleLexer
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from prompt_toolkit.search import SearchDirection
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__all__ = [
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"ArgToolbar",
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"CompletionsToolbar",
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"FormattedTextToolbar",
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"SearchToolbar",
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"SystemToolbar",
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"ValidationToolbar",
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]
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E = KeyPressEvent
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class FormattedTextToolbar(Window):
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def __init__(self, text: AnyFormattedText, style: str = "", **kw: Any) -> None:
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# Note: The style needs to be applied to the toolbar as a whole, not
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# just the `FormattedTextControl`.
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super().__init__(
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FormattedTextControl(text, **kw),
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style=style,
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dont_extend_height=True,
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height=Dimension(min=1),
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)
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class SystemToolbar:
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"""
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Toolbar for a system prompt.
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:param prompt: Prompt to be displayed to the user.
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"""
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def __init__(
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self,
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prompt: AnyFormattedText = "Shell command: ",
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enable_global_bindings: FilterOrBool = True,
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) -> None:
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self.prompt = prompt
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self.enable_global_bindings = to_filter(enable_global_bindings)
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self.system_buffer = Buffer(name=SYSTEM_BUFFER)
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self._bindings = self._build_key_bindings()
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self.buffer_control = BufferControl(
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buffer=self.system_buffer,
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lexer=SimpleLexer(style="class:system-toolbar.text"),
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input_processors=[
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BeforeInput(lambda: self.prompt, style="class:system-toolbar")
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],
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key_bindings=self._bindings,
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)
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self.window = Window(
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self.buffer_control, height=1, style="class:system-toolbar"
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)
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self.container = ConditionalContainer(
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content=self.window, filter=has_focus(self.system_buffer)
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)
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def _get_display_before_text(self) -> StyleAndTextTuples:
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return [
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("class:system-toolbar", "Shell command: "),
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("class:system-toolbar.text", self.system_buffer.text),
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("", "\n"),
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]
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def _build_key_bindings(self) -> KeyBindingsBase:
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focused = has_focus(self.system_buffer)
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# Emacs
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emacs_bindings = KeyBindings()
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handle = emacs_bindings.add
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@handle("escape", filter=focused)
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@handle("c-g", filter=focused)
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@handle("c-c", filter=focused)
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def _cancel(event: E) -> None:
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"Hide system prompt."
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self.system_buffer.reset()
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event.app.layout.focus_last()
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@handle("enter", filter=focused)
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async def _accept(event: E) -> None:
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"Run system command."
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await event.app.run_system_command(
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self.system_buffer.text,
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display_before_text=self._get_display_before_text(),
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)
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self.system_buffer.reset(append_to_history=True)
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event.app.layout.focus_last()
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# Vi.
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vi_bindings = KeyBindings()
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handle = vi_bindings.add
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@handle("escape", filter=focused)
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@handle("c-c", filter=focused)
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def _cancel_vi(event: E) -> None:
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"Hide system prompt."
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event.app.vi_state.input_mode = InputMode.NAVIGATION
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self.system_buffer.reset()
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event.app.layout.focus_last()
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@handle("enter", filter=focused)
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async def _accept_vi(event: E) -> None:
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"Run system command."
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event.app.vi_state.input_mode = InputMode.NAVIGATION
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await event.app.run_system_command(
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self.system_buffer.text,
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display_before_text=self._get_display_before_text(),
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)
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self.system_buffer.reset(append_to_history=True)
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event.app.layout.focus_last()
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# Global bindings. (Listen to these bindings, even when this widget is
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# not focussed.)
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global_bindings = KeyBindings()
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handle = global_bindings.add
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@handle(Keys.Escape, "!", filter=~focused & emacs_mode, is_global=True)
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def _focus_me(event: E) -> None:
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"M-'!' will focus this user control."
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event.app.layout.focus(self.window)
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@handle("!", filter=~focused & vi_mode & vi_navigation_mode, is_global=True)
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def _focus_me_vi(event: E) -> None:
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"Focus."
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event.app.vi_state.input_mode = InputMode.INSERT
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event.app.layout.focus(self.window)
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return merge_key_bindings(
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[
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ConditionalKeyBindings(emacs_bindings, emacs_mode),
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ConditionalKeyBindings(vi_bindings, vi_mode),
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ConditionalKeyBindings(global_bindings, self.enable_global_bindings),
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]
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)
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def __pt_container__(self) -> Container:
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return self.container
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class ArgToolbar:
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def __init__(self) -> None:
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def get_formatted_text() -> StyleAndTextTuples:
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arg = get_app().key_processor.arg or ""
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if arg == "-":
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arg = "-1"
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return [
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("class:arg-toolbar", "Repeat: "),
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("class:arg-toolbar.text", arg),
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]
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self.window = Window(FormattedTextControl(get_formatted_text), height=1)
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self.container = ConditionalContainer(content=self.window, filter=has_arg)
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def __pt_container__(self) -> Container:
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return self.container
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class SearchToolbar:
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"""
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:param vi_mode: Display '/' and '?' instead of I-search.
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:param ignore_case: Search case insensitive.
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"""
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def __init__(
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self,
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search_buffer: Buffer | None = None,
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vi_mode: bool = False,
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text_if_not_searching: AnyFormattedText = "",
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forward_search_prompt: AnyFormattedText = "I-search: ",
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backward_search_prompt: AnyFormattedText = "I-search backward: ",
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ignore_case: FilterOrBool = False,
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) -> None:
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if search_buffer is None:
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search_buffer = Buffer()
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@Condition
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def is_searching() -> bool:
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return self.control in get_app().layout.search_links
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def get_before_input() -> AnyFormattedText:
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if not is_searching():
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return text_if_not_searching
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elif (
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self.control.searcher_search_state.direction == SearchDirection.BACKWARD
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):
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return "?" if vi_mode else backward_search_prompt
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else:
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return "/" if vi_mode else forward_search_prompt
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self.search_buffer = search_buffer
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self.control = SearchBufferControl(
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buffer=search_buffer,
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input_processors=[
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BeforeInput(get_before_input, style="class:search-toolbar.prompt")
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],
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lexer=SimpleLexer(style="class:search-toolbar.text"),
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ignore_case=ignore_case,
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)
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self.container = ConditionalContainer(
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content=Window(self.control, height=1, style="class:search-toolbar"),
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filter=is_searching,
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)
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def __pt_container__(self) -> Container:
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return self.container
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class _CompletionsToolbarControl(UIControl):
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def create_content(self, width: int, height: int) -> UIContent:
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all_fragments: StyleAndTextTuples = []
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complete_state = get_app().current_buffer.complete_state
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if complete_state:
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completions = complete_state.completions
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index = complete_state.complete_index # Can be None!
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# Width of the completions without the left/right arrows in the margins.
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content_width = width - 6
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# Booleans indicating whether we stripped from the left/right
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cut_left = False
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cut_right = False
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# Create Menu content.
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fragments: StyleAndTextTuples = []
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for i, c in enumerate(completions):
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# When there is no more place for the next completion
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if fragment_list_len(fragments) + len(c.display_text) >= content_width:
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# If the current one was not yet displayed, page to the next sequence.
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if i <= (index or 0):
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fragments = []
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cut_left = True
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# If the current one is visible, stop here.
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else:
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cut_right = True
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break
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fragments.extend(
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to_formatted_text(
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c.display_text,
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style=(
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"class:completion-toolbar.completion.current"
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if i == index
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else "class:completion-toolbar.completion"
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),
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)
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)
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fragments.append(("", " "))
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# Extend/strip until the content width.
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fragments.append(("", " " * (content_width - fragment_list_len(fragments))))
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fragments = fragments[:content_width]
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# Return fragments
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all_fragments.append(("", " "))
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all_fragments.append(
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("class:completion-toolbar.arrow", "<" if cut_left else " ")
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)
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all_fragments.append(("", " "))
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all_fragments.extend(fragments)
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all_fragments.append(("", " "))
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all_fragments.append(
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("class:completion-toolbar.arrow", ">" if cut_right else " ")
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)
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all_fragments.append(("", " "))
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def get_line(i: int) -> StyleAndTextTuples:
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return all_fragments
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return UIContent(get_line=get_line, line_count=1)
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class CompletionsToolbar:
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def __init__(self) -> None:
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self.container = ConditionalContainer(
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content=Window(
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_CompletionsToolbarControl(), height=1, style="class:completion-toolbar"
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),
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filter=has_completions,
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)
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def __pt_container__(self) -> Container:
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return self.container
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class ValidationToolbar:
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def __init__(self, show_position: bool = False) -> None:
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def get_formatted_text() -> StyleAndTextTuples:
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buff = get_app().current_buffer
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if buff.validation_error:
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row, column = buff.document.translate_index_to_position(
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buff.validation_error.cursor_position
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)
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if show_position:
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text = f"{buff.validation_error.message} (line={row + 1} column={column + 1})"
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else:
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text = buff.validation_error.message
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return [("class:validation-toolbar", text)]
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else:
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return []
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self.control = FormattedTextControl(get_formatted_text)
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self.container = ConditionalContainer(
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content=Window(self.control, height=1), filter=has_validation_error
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)
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def __pt_container__(self) -> Container:
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return self.container
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