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class Ruler
Helper class, used by [[MarkdownIt#core]], [[MarkdownIt#block]] and
[[MarkdownIt#inline]] to manage sequences of functions (rules):
- keep rules in defined order
- assign the name to each rule
- enable/disable rules
- add/replace rules
- allow assign rules to additional named chains (in the same)
- caching lists of active rules
You will not need use this class directly until write plugins. For simple
rules control use [[MarkdownIt.disable]], [[MarkdownIt.enable]] and
[[MarkdownIt.use]].
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beforeNamec C sV | � |�}|pi }|dkrtd|� ���| j�|tt |d||�dg ��� d| _dS )aK Add new rule to chain before one with given name.
:param beforeName: new rule will be added before this one.
:param ruleName: new rule will be added before this one.
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:raises: KeyError if name not found
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z Ruler.before� afterNamec C sZ | � |�}|pi }|dkrtd|� ���| j�|d tt |d||�dg ��� d| _dS )aG Add new rule to chain after one with given name.
:param afterName: new rule will be added after this one.
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:param fn: new rule function.
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C s0 | j �tt |d||p i �dg ��� d| _dS )z�Push new rule to the end of chain.
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Tr1 N)r< rF r5 r4 rN r= )r rI r: rJ r r r �push� s
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ignoreInvalidr7 r0 c C �p t |t�r|g}g }|D ]&}| �|�}|dk r|rq |dk r'|s'td|� ���d| j| _|�|� q d| _|S )a Enable rules with given names.
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z Ruler.enablec C s. t |t�r|g}| jD ]}d|_q | �||�S )a- Enable rules with given names, and disable everything else.
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zRuler.enableOnlyc C r[ )a Disable rules with given names.
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Ruler.disablerD � chainName�list[RuleFuncTv]c C s2 | j du r| �� | j dusJ �| j �|g �pg S )a= Return array of active functions (rules) for given chain name.
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Default chain name is `''` (empty string). It can't be skipped.
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