Markdown

Added in version 0.11.0

A widget to display a Markdown document.

• Focusable
• Container

Tip

See MarkdownViewer for a widget that adds additional features such as a Table of Contents.

Example

The following example displays Markdown from a string.

Outputmarkdown.py

from textual.app import App, ComposeResult
from textual.widgets import Markdown

EXAMPLE_MARKDOWN = """\
## Markdown

- Typography *emphasis*, **strong**, `inline code` etc.    
- Headers    
- Lists    
- Syntax highlighted code blocks
- Tables and more

## Quotes

> I must not fear.
> > Fear is the mind-killer.
> > Fear is the little-death that brings total obliteration.
> > I will face my fear.
> > > I will permit it to pass over me and through me.
> > > And when it has gone past, I will turn the inner eye to see its path.
> > > Where the fear has gone there will be nothing. Only I will remain.

## Tables

| Name            | Type   | Default | Description                        |
| --------------- | ------ | ------- | ---------------------------------- |
| `show_header`   | `bool` | `True`  | Show the table header              |
| `fixed_rows`    | `int`  | `0`     | Number of fixed rows               |
| `fixed_columns` | `int`  | `0`     | Number of fixed columns            |

## Code blocks

```python
def loop_last(values: Iterable[T]) -> Iterable[Tuple[bool, T]]:
    \"\"\"Iterate and generate a tuple with a flag for last value.\"\"\"
    iter_values = iter(values)
    try:
        previous_value = next(iter_values)
    except StopIteration:
        return
    for value in iter_values:
        yield False, previous_value
        previous_value = value
    yield True, previous_value
```


"""


class MarkdownExampleApp(App):

    def compose(self) -> ComposeResult:
        markdown = Markdown(EXAMPLE_MARKDOWN)
        markdown.code_indent_guides = False
        yield markdown


if __name__ == "__main__":
    app = MarkdownExampleApp()
    app.run()

Reactive Attributes

This widget has no reactive attributes.

Messages

• Markdown.TableOfContentsUpdated
• Markdown.TableOfContentsSelected
• Markdown.LinkClicked

Bindings

This widget has no bindings.

Component Classes

The markdown widget provides the following component classes:

These component classes target standard inline markdown styles. Changing these will potentially break the standard markdown formatting.

Class	Description
code_inline	Target text that is styled as inline code.
em	Target text that is emphasized inline.
s	Target text that is styled inline with strikethrough.
strong	Target text that is styled inline with strong.

See Also

• MarkdownViewer code reference

---

Bases: Widget

Parameters:

Name	Type	Description	Default
markdown	str | None	String containing Markdown or None to leave blank for now.	None
name	str | None	The name of the widget.	None
id	str | None	The ID of the widget in the DOM.	None
classes	str | None	The CSS classes of the widget.	None
parser_factory	Callable[[], MarkdownIt] | None	A factory function to return a configured MarkdownIt instance. If None, a "gfm-like" parser is used.	None
open_links	bool	Open links automatically. If you set this to False, you can handle the LinkClicked events.	True

COMPONENT_CLASSES class-attribute instance-attribute

COMPONENT_CLASSES = {'em', 'strong', 's', 'code_inline'}

These component classes target standard inline markdown styles. Changing these will potentially break the standard markdown formatting.

Class	Description
code_inline	Target text that is styled as inline code.
em	Target text that is emphasized inline.
s	Target text that is styled inline with strikethrough.
strong	Target text that is styled inline with strong.

code_dark_theme class-attribute instance-attribute

code_dark_theme = reactive('material')

The theme to use for code blocks when the App theme is dark.

code_indent_guides class-attribute instance-attribute

code_indent_guides = reactive(True)

Should code fences display indent guides?

code_light_theme class-attribute instance-attribute

code_light_theme = reactive('material-light')

The theme to use for code blocks when the App theme is light.

LinkClicked

LinkClicked(markdown, href)

Bases: Message

A link in the document was clicked.

control property

control

The Markdown widget containing the link clicked.

This is an alias for LinkClicked.markdown and is used by the on decorator.

href instance-attribute

href = unquote(href)

The link that was selected.

markdown instance-attribute

markdown = markdown

The Markdown widget containing the link clicked.

TableOfContentsSelected

TableOfContentsSelected(markdown, block_id)

Bases: Message

An item in the TOC was selected.

block_id instance-attribute

block_id = block_id

ID of the block that was selected.

control property

control

The Markdown widget where the selected item is.

This is an alias for TableOfContentsSelected.markdown and is used by the on decorator.

markdown instance-attribute

markdown = markdown

The Markdown widget where the selected item is.

TableOfContentsUpdated

TableOfContentsUpdated(markdown, table_of_contents)

Bases: Message

The table of contents was updated.

control property

control

The Markdown widget associated with the table of contents.

This is an alias for TableOfContentsUpdated.markdown and is used by the on decorator.

markdown instance-attribute

markdown = markdown

The Markdown widget associated with the table of contents.

table_of_contents instance-attribute

table_of_contents = table_of_contents

Table of contents.

goto_anchor

goto_anchor(anchor)

Try and find the given anchor in the current document.

Parameters:

Name	Type	Description	Default
anchor	str	The anchor to try and find.	required

Note

The anchor is found by looking at all of the headings in the document and finding the first one whose slug matches the anchor.

Note that the slugging method used is similar to that found on GitHub.

Returns:

Type	Description
bool	True when the anchor was found in the current document, False otherwise.

load async

load(path)

Load a new Markdown document.

Parameters:

Name	Type	Description	Default
path	Path	Path to the document.	required

Raises:

Type	Description
OSError	If there was some form of error loading the document.

Note

The exceptions that can be raised by this method are all of those that can be raised by calling Path.read_text.

sanitize_location staticmethod

sanitize_location(location)

Given a location, break out the path and any anchor.

Parameters:

Name	Type	Description	Default
location	str	The location to sanitize.	required

Returns:

Type	Description
Path	A tuple of the path to the location cleaned of any anchor, plus
str	the anchor (or an empty string if none was found).

unhandled_token

unhandled_token(token)

Process an unhandled token.

Parameters:

Name	Type	Description	Default
token	Token	The MarkdownIt token to handle.	required

Returns:

Type	Description
MarkdownBlock | None	Either a widget to be added to the output, or None.

update

update(markdown)

Update the document with new Markdown.

Parameters:

Name	Type	Description	Default
markdown	str	A string containing Markdown.	required

Returns:

Type	Description
AwaitComplete	An optionally awaitable object. Await this to ensure that all children have been mounted.