language
Wrappers around the TIM parsing engine, implementing caching and context management.
MarkupLanguage
A relatively simple object that binds context to TIM parsing functions.
Most of the job this class has is to pass along a ContextDict
to various
"lower level" functions, in order to maintain a sort of state. It also exposes
ways to modify this state, namely the alias
and define
methods.
Source code in pytermgui/markup/language.py
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alias(name, value, *, generate_unsetter=True)
Creates an alias from one custom name to a set of styles.
These can be used to store and reference a set of tags using only one name.
Aliases may reference other aliases, but only do this consciously, as it can become a hard to follow trail of sorrow very quickly!
Parameters:
Name | Type | Description | Default |
---|---|---|---|
name |
str
|
The name this alias will be referenced by. |
required |
value |
str
|
The markup value that the alias will represent. |
required |
generate_unsetter |
bool
|
Disable generating clearer aliases. For example:
will generate:
|
True
|
Source code in pytermgui/markup/language.py
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alias_multiple(*, generate_unsetter=True, **items)
Runs MarkupLanguage.alias
repeatedly for all arguments.
The same generate_unsetter
value will be used for all calls.
You can use this in two forms:
-
Traditional keyword arguments:
lang.alias_multiple(my-tag1="bold", my-tag2="italic")
-
Keyword argument unpacking:
my_aliases = {"my-tag1": "bold", "my-tag2": "italic"} lang.alias_multiple(**my_aliases)
Source code in pytermgui/markup/language.py
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aliases()
property
Returns a copy of the aliases defined in context.
Source code in pytermgui/markup/language.py
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clear_cache()
Clears the internal cache.
Use this after re-defining aliases.
Source code in pytermgui/markup/language.py
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define(name, method)
Defines a markup macro.
Macros are essentially function bindings callable within markup. They can be very useful to represent changing data and simplify TIM code.
Parameters:
Name | Type | Description | Default |
---|---|---|---|
name |
str
|
The name that will be used within TIM to call the macro. Must start with
a bang ( |
required |
method |
MacroType
|
The function bound to the name given above. This function will take any number of strings as arguments, and return a terminal-ready (i.e. parsed) string. |
required |
Source code in pytermgui/markup/language.py
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get_markup(text)
staticmethod
DEPRECATED: Convert ANSI text into markup.
This function does not use context, and thus is out of place here.
Source code in pytermgui/markup/language.py
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group_styles(text, tokenizer=tokenize_ansi)
Generate StyledText-s from some text, using our context.
See StyledText.group_styles
for arguments.
Source code in pytermgui/markup/language.py
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macros()
property
Returns a copy of the macros defined in context.
Source code in pytermgui/markup/language.py
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parse(text, optimize=False, append_reset=True)
Parses some markup text.
This is a thin wrapper around pytermgui.markup.parsing.parse
. The main additions
of this wrapper are a caching system, as well as state management.
Ignoring caching, all calls to this function would be equivalent to:
def parse(self, *args, **kwargs) -> str:
kwargs["context"] = self.context
return parse(*args, **kwargs)
Source code in pytermgui/markup/language.py
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print(*args, **kwargs)
Parse all arguments and pass them through to print, along with kwargs.
Source code in pytermgui/markup/language.py
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StyledText
dataclass
An ANSI style-infused string.
This is a sort of helper to handle ANSI texts in a more semantic manner. It keeps track of a sequence and a plain part.
Calling len()
will return the length of the printable, non-ANSI part, and
indexing will return the characters at the given slice, but also include the
sequences that are applied to them.
To generate StyledText-s, it is recommended to use the StyledText.group_styles
classmethod.
Source code in pytermgui/markup/language.py
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background()
property
cached
Returns the background color of this object.
Source code in pytermgui/markup/language.py
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blink()
property
cached
Returns this text is blinking.
Source code in pytermgui/markup/language.py
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blink2()
property
cached
Returns this text is alternate-blinking.
Source code in pytermgui/markup/language.py
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bold()
property
cached
Returns this text is bold.
Source code in pytermgui/markup/language.py
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dim()
property
cached
Returns this text is dimmed.
Source code in pytermgui/markup/language.py
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first_of(text)
classmethod
Returns the first element of cls.group_styles(text).
Source code in pytermgui/markup/language.py
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foreground()
property
cached
Returns the foreground color of this object.
Source code in pytermgui/markup/language.py
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group_styles(text, tokenizer=tokenize_ansi, context=None)
staticmethod
Yields StyledTexts from an ANSI coded string.
A new StyledText will be created each time a non-plain token follows a plain token, thus all texts will represent a single (ANSI)PLAIN group of characters.
Source code in pytermgui/markup/language.py
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inverse()
property
cached
Returns this text has its colors inversed.
Source code in pytermgui/markup/language.py
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italic()
property
cached
Returns this text is italicized.
Source code in pytermgui/markup/language.py
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overline()
property
cached
Returns this text is overlined.
Source code in pytermgui/markup/language.py
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strikethrough()
property
cached
Returns this text is striked out.
Source code in pytermgui/markup/language.py
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underline()
property
cached
Returns this text is underlined.
Source code in pytermgui/markup/language.py
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escape(text)
Escapes any markup found within the given text.
Source code in pytermgui/markup/language.py
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