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math(mn(3), class='test')
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'<math class="test">
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"zMathSchema.append)rr r� r� r� r~ rb rl r� r r r� r rn s rn c @ s e Zd ZdS )�msubNr� r r r r r� ( r r� c @ s e Zd ZdS )�msupNr� r r r r r� ) r r� c @ s e Zd ZdZdS )�msubsupr Nr� r r r r r� * s r� c @ s e Zd ZdS )�munderNr� r r r r r� 4 r r� c @ s e Zd ZdS )�moverNr� r r r r r� 5 r r� c @ s e Zd ZdS )�
munderoverNr� r r r r r� E r r� c @ s e Zd ZdZdS )�mrootrH Nr� r r r r r� G s r� c @ s e Zd ZdZdS )�mfracrH Nr� r r r r r� J s r� c @ s e Zd ZdZdS )�mspacer Nr� r r r r r� M s r� c C s4 t �d| �}|du r t �d| �}|�d�|�d�fS )a" Return leading TeX command name and remainder of `string`.
>>> tex_cmdname('mymacro2') # up to first non-letter
('mymacro', '2')
>>> tex_cmdname('name 2') # strip trailing whitespace
('name', '2')
>>> tex_cmdname('_2') # single non-letter character
('_', '2')
z([a-zA-Z]+) *(.*)Nz(.?)(.*)rG rH ��re�match�group��string�mr r r � tex_cmdnameW s r� c C s0 t �d| �}|du r d| fS |�d�|�d�fS )zmReturn leading number literal and remainder of `string`.
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('123.4', '')
z([0-9.,]*[0-9]+)(.*)Nr< rG rH r� r� r r r �
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>>> tex_token('\command{without argument}')
('\command', '{without argument}')
>>> tex_token('or first character')
('o', 'r first character')
a% ((?P<cmd>\\[a-zA-Z]+)\s* # TeX command, skip whitespace
|(?P<chcmd>\\.) # one-character TeX command
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�cmd�chcmd�ch� remainder)r� r� �VERBOSEr� )r� r� r� r� r� r� r r r � tex_token� s
�r� c C s� d}d}d}| � d�s.| dd� | dd� fS | D ]R}|d7 }|rHd}n0|dkrVd}n"|dkrh|d7 }n|dkrx|d8 }|dkr2 q�q2td ��| d|d � | |d� fS )
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('first group', ' returned without brackets')
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>>> tex_token_or_group('\command{without argument}')
('\command', '{without argument}')
>>> tex_token_or_group('first character')
('f', 'irst character')
>>> tex_token_or_group(' also whitespace')
(' ', 'also whitespace')
>>> tex_token_or_group('{first group} keep rest')
('first group', ' keep rest')
rA )r� r� �lstrip)r� r r� r r r �tex_token_or_group� s
r� c C sd t �d| t j�}|du r*| �d�s*d| fS z|�d�|�d�fW S ty^ td| ��Y n0 dS )a$ Return optional argument and remainder.
>>> tex_optarg('[optional argument] returned without brackets')
('optional argument', ' returned without brackets')
>>> tex_optarg('{empty string, if there is no optional arg}')
('', '{empty string, if there is no optional arg}')
z�\s* # leading whitespace
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Nr? r< �optargr� z+Could not extract optional argument from %r)r� r� r� r� r� r� r� r� r r r �
tex_optarg� s � r� c C s� d� |�� �}| }t|�dk�r�|d |dd� }}|dkr@q|dkrft|�\}}t|| |�\} }q|dv rzt| |�} q|dkr�t� }| �|� |} q|dkr�| �� } q|d kr�t � }| �� �|� |} q|�
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>>> parse_latex_math(math(), r'lpha')
math(mi('α'))
>>> parse_latex_math(mrow(), r'x_{n}')
mrow(msub(mi('x'), mi('n')))
r' r rG Nr �_^rA rB rT r: r� rf z([=�class�mathopen�prefix�formz/()[]|F�Zstretchyz
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t||� �q~||fS | t%v �r�|�t&dAt%| dB��}||fS | dCv �rHt'|�\}}|�dD��r,dEt(|ddF� �dG }|�t&dA| dB��}||fS | dHk�rjt)� }|�|� ||fS | dIk�r�t*dJdK�}|�|� ||fS | dLk�r�t+|�\}}|�r�t� }t,|d(dM�}t||� |� � nt-� }|�|� ||fS | t.v �r�t.| \}}| dNk�rNt+|�\}}d1d4dO�}||v �rN|�/� }|| |dP< dQ|| |d< t0f i |�� }}| �dR��r�ttdS�|tdT�dRdU�}dV|_1|�r�t|fi |��}|�|� ||fS | dk�r�t2� }t3|�}|� � � � �|� ||fS | t4v �r:ttt4| d d
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dZ�}| |_6|�|� ||fS | d[k�r�td(dM�}|�|� ||fS | t8v �r�ttt8| d �d(dM�}| |_6|�|� ||fS | d\k�r td(dM�}|�|� ||fS | d]v �r�t+|�\}}ttd^| dd� �}|�rlt9|�}tt� |�}t:|�dk�r`|j5d }|�|� nt|�}|�|� ||fS | t;v � rtf i t;| ��}d|_1t<|t��r�t:|�dk�r�||j=j5|j=j5�>|�< |j=|_=n&|j?j@d_k�r�|�|� n td`| ��||fS | �da�� rLt |�\}}|dbv � rD|}tA||| dc�}||fS | ddk� r`tB||�S | dek� rttC||�S tdf| ��dS )guj Process LaTeX command `name` followed by `string`.
Append result to `node`.
If needed, parse `string` for command argument.
Return new current node and remainder of `string`:
>>> handle_cmd('hbar', math(), r' rac')
(math(mi('ℏ')), ' \frac')
>>> handle_cmd('hspace', math(), r'{1ex} (x)')
(math(mspace(width='1ex')), ' (x)')
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