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