euporie.preview.app
Concern dumping output.
Functions
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Register a new config item. |
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Cast a value to a type. |
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Return an |
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Get the current active (running) Application. |
Get the current application. |
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Update the key-binding registry. |
Classes
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All euporie apps. |
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Container class that dynamically returns any Container. |
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A FloatContainer which uses :py`BoundedWritePosition`s. |
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Preview app. |
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A notebook tab which renders cells sequentially. |
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Make an output stream look like a TTY. |
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Container that holds a control. |
partial(func, *args, **keywords) - new function with partial application of the given arguments and keywords. |
- class euporie.preview.app.PreviewApp(**kwargs: Any)
Bases:
BaseApp
Preview app.
Preview notebook files in the terminal.
Outputs a formatted notebook file. The formatted output will be written to the the output file path given by output_file (the standard output by default).
- async cancel_and_wait_for_background_tasks() None
Cancel all background tasks, and wait for the cancellation to complete. If any of the background tasks raised an exception, this will also propagate the exception.
(If we had nurseries like Trio, this would be the __aexit__ of a nursery.)
- cleanup(signum: int, frame: FrameType | None) None
Restore the state of the terminal on unexpected exit.
- close_tab(tab: Tab | None = None) None
Close a notebook tab.
- Parameters:
tab – The instance of the tab to close. If None, the currently selected tab will be closed.
- property color_depth: ColorDepth
The active
ColorDepth
.The current value is determined as follows:
If a color depth was given explicitly to this application, use that value.
Otherwise, fall back to the color depth that is reported by the
Output
implementation. If theOutput
class was created using output.defaults.create_output, then this value is coming from the $PROMPT_TOOLKIT_COLOR_DEPTH environment variable.
- color_palette: ColorPalette
- context: contextvars.Context | None
- cpr_not_supported_callback() None
Called when we don’t receive the cursor position response in time.
- create_background_task(coroutine: Coroutine[Any, Any, None]) Task[None]
Start a background task (coroutine) for the running application. When the Application terminates, unfinished background tasks will be cancelled.
Given that we still support Python versions before 3.11, we can’t use task groups (and exception groups), because of that, these background tasks are not allowed to raise exceptions. If they do, we’ll call the default exception handler from the event loop.
If at some point, we have Python 3.11 as the minimum supported Python version, then we can use a TaskGroup (with the lifetime of Application.run_async(), and run run the background tasks in there.
This is not threadsafe.
- create_merged_style() BaseStyle
Generate a new merged style for the application.
Using a dynamic style has serious performance issues, so instead we update the style on the renderer directly when it changes in self.update_style
- Returns:
Return a combined style to use for the application
- property current_buffer: Buffer
The currently focused
Buffer
.(This returns a dummy
Buffer
when none of the actual buffers has the focus. In this case, it’s really not practical to check for None values or catch exceptions every time.)
- property current_search_state: SearchState
Return the current
SearchState
. (The one for the focusedBufferControl
.)
- draw(render_as_done: bool = True) None
Draw the app without focus, leaving the cursor below the drawn output.
- exit(result: _AppResult | None = None, exception: BaseException | type[BaseException] | None = None, style: str = '') None
Optionally pipe the output to a pager on exit.
- get_edit_mode() EditingMode
Return the editing mode enum defined in the configuration.
- get_language_lsps(language: str) list[euporie.core.lsp.LspClient]
Return the approprrate LSP clients for a given language.
- get_used_style_strings() list[str]
Return a list of used style strings. This is helpful for debugging, and for writing a new Style.
- async classmethod interact(ssh_session: PromptToolkitSSHSession) None
Run the app asynchronously for the hub SSH server.
- key_processor
The InputProcessor instance.
- load_container() FloatContainer
Return a container with all opened tabs.
- classmethod load_input() Input
Create the input for this application to use.
Ensures the TUI app always tries to run in a TTY.
- Returns:
A prompt-toolkit input instance
- classmethod load_output() Output
Load the output.
Depending on the application configuration, will set the output to a file, to stdout, or to a temporary file so the output can be displayed in a pager.
- Returns:
A container for notebook output
- lsp_clients: WeakValueDictionary[str, LspClient]
- mouse_limits: WritePosition | None
- open_file(path: Path, read_only: bool = False, tab_class: type[Tab] | None = None) None
Create a tab for a file.
- Parameters:
path – The file path of the notebook file to open
read_only – If true, the file should be opened read_only
tab_class – The tab type to use to open the file
- pause_rendering() None
Block rendering, but allows input to be processed.
The first line prevents the display being drawn, and the second line means the key processor continues to process keys. We need this as we need to wait for the results of terminal queries which come in as key events.
This is used to prevent flicker when we update the styles based on terminal feedback.
- pre_run(app: prompt_toolkit.application.application.Application | None = None) None
Call during the ‘pre-run’ stage of application loading.
- print_text(text: AnyFormattedText, style: BaseStyle | None = None) None
Print a list of (style_str, text) tuples to the output. (When the UI is running, this method has to be called through run_in_terminal, otherwise it will destroy the UI.)
- Parameters:
text – List of
(style_str, text)
tuples.style – Style class to use. Defaults to the active style in the CLI.
- quoted_insert
Quoted insert. This flag is set if we go into quoted insert mode.
- render_counter
Render counter. This one is increased every time the UI is rendered. It can be used as a key for caching certain information during one rendering.
- run(pre_run: Optional[Callable[[], None]] = None, set_exception_handler: bool = True, handle_sigint: bool = True, in_thread: bool = False, inputhook: Optional[Callable[[InputHookContext], None]] = None) _AppResult
A blocking ‘run’ call that waits until the UI is finished.
This will run the application in a fresh asyncio event loop.
- Parameters:
pre_run – Optional callable, which is called right after the “reset” of the application.
set_exception_handler – When set, in case of an exception, go out of the alternate screen and hide the application, display the exception, and wait for the user to press ENTER.
in_thread – When true, run the application in a background thread, and block the current thread until the application terminates. This is useful if we need to be sure the application won’t use the current event loop (asyncio does not support nested event loops). A new event loop will be created in this background thread, and that loop will also be closed when the background thread terminates. When this is used, it’s especially important to make sure that all asyncio background tasks are managed through get_appp().create_background_task(), so that unfinished tasks are properly cancelled before the event loop is closed. This is used for instance in ptpython.
handle_sigint – Handle SIGINT signal. Call the key binding for Keys.SIGINT. (This only works in the main thread.)
- async run_async(pre_run: Callable[[], None] | None = None, set_exception_handler: bool = True, handle_sigint: bool = True, slow_callback_duration: float = 0.5) _AppResult
Run the application.
- async run_system_command(command: str, wait_for_enter: bool = True, display_before_text: AnyFormattedText = '', wait_text: str = 'Press ENTER to continue...') None
Run system command (While hiding the prompt. When finished, all the output will scroll above the prompt.)
- Parameters:
command – Shell command to be executed.
wait_for_enter – FWait for the user to press enter, when the command is finished.
display_before_text – If given, text to be displayed before the command executes.
- Returns:
A Future object.
- suspend_to_background(suspend_group: bool = True) None
(Not thread safe – to be called from inside the key bindings.) Suspend process.
- Parameters:
suspend_group – When true, suspend the whole process group. (This is the default, and probably what you want.)
- timeoutlen
Like Vim’s timeoutlen option. This can be None or a float. For instance, suppose that we have a key binding AB and a second key binding A. If the uses presses A and then waits, we don’t handle this binding yet (unless it was marked ‘eager’), because we don’t know what will follow. This timeout is the maximum amount of time that we wait until we call the handlers anyway. Pass None to disable this timeout.
- ttimeoutlen
When to flush the input (For flushing escape keys.) This is important on terminals that use vt100 input. We can’t distinguish the escape key from for instance the left-arrow key, if we don’t know what follows after “x1b”. This little timer will consider “x1b” to be escape if nothing did follow in this time span. This seems to work like the ttimeoutlen option in Vim.
- update_style(query: TerminalQuery | Setting | None = None) None
Update the application’s style when the syntax theme is changed.
- vi_state
Vi state. (For Vi key bindings.)
- euporie.preview.app.get_preview_app() PreviewApp
Get the current application.