U cfB@sRdZddlZddlZddlmZddlmZddlmZdddd d d d d gZ ddl m Z m Z e eZGdddeZGdddeZGdddZGdd d ejZGdd d ejZejejejejejejiZeddGdd d e ZeeeeedddZeeeeedddZeddGdd d e ZeddGdd d e Z dS)z!Layout utilities (to be expanded)N) dataclass)Fraction)Optional LayoutErrorBoxSpecificationErrorBoxConstraints AxisAlignmentMargins InnerScalingSimpleBoxLayoutRule Positioning)ConfigurableMixinConfigurationErrorcs&eZdZdZedfdd ZZS)rz+Indicates an error in a layout computation.msgcs||_tj|f|dSN)rsuper__init__)selfrargs __class__rrrrr sc@sneZdZdZeZeZeZe e ddddZ e e ddddZ e ddZeeed d d Zd S) rz;Class representing one-dimensional alignment along an axis.) align_strr*cCsFztjtjtjd|WStk r@td|dYnXdS)a Convert from a horizontal alignment config string. :param align_str: A string: 'left', 'mid' or 'right'. :return: An :class:`.AxisAlignment` value. :raise ConfigurationError: on unexpected string inputs. )leftmidrightr6zO' is not a valid horizontal alignment; valid values are 'left', 'mid', 'right'.Nr ALIGN_MIN ALIGN_MID ALIGN_MAXr;r<rr=rBrrr from_x_aligns  zAxisAlignment.from_x_aligncCsFztjtjtjd|WStk r@td|dYnXdS)a  Convert from a vertical alignment config string. :param align_str: A string: 'bottom', 'mid' or 'top'. :return: An :class:`.AxisAlignment` value. :raise ConfigurationError: on unexpected string inputs. )bottomrDtopr6zM' is not a valid vertical alignment; valid values are 'bottom', 'mid', 'top'.NrFrJrrr from_y_aligns  zAxisAlignment.from_y_aligncCst|Sr)_alignment_oppositesr(rrrflippedszAxisAlignment.flipped) container_len inner_lenr*c Cstd|||}|tjkr&|||S|tjkr4|S||krdtd|d|d|d|d |S|tjkr||d}||SdS)NlengthzContent box width/height z is too wide for container size z with margins (, z); post_margin will be ignored)r effectiverrIrGloggerwarningrH)rrQrR pre_margin post_marginZeffective_max_lenZ inner_offsetrrraligns$     zAxisAlignment.alignN)rrrrr?r@rGrHrIrArrKrNr2rPr%r[rrrrrs T)frozenc@s:eZdZUdZeed<eed<eed<eed<ddZdS) r zP Class describing the position and scaling of an object in a container. x_posy_posx_scaley_scalecCsd|j|j|j|jfS)z Convenience method to convert this :class:`.Positioning` into a PDF ``cm`` operator. :return: A byte string representing the ``cm`` operator corresponding to this :class:`.Positioning`. s%g 0 0 %g %g %g cm)r_r`r]r^r(rrras_cmOs zPositioning.as_cmN)rrrrr%r0floatrarrrrr =s  alignment container_boxinner_nat_widthrYrZcCs.|jr||j|||S||||_|SdSr)r,r[r&rcrrr _aln_width]srgrdreinner_nat_heightrYrZcCs.|jr||j|||S||||_|SdSr)r.r[r'rhrrr _aln_heighthsrjcs~eZdZUdZdZeed<dZeed<dZeed<dZ eed<e ddZ e d d Z d d Zd dZe fddZZS)r z"Class describing a set of margins.rrCrErMrLcCst||||S)z Return a set of uniform margins. :param num: The uniform margin to apply to all four sides. :return: ``Margins(num, num, num, num)`` )r )r=numrrruniforms zMargins.uniformc Cs:|||}|dkr6td|d|d|d|d |S)z4Internal helper method to compute effective margins.rz Margins (rTz) too wide for container  .)r)Zdim_namerQprepostZeffrrrrVs  zMargins.effectivecCstd||j|jS)a& Compute width without margins. :param width: The container width. :return: The width after subtracting the left and right margins. :raises LayoutError: if the container width is too short to accommodate the margins. r&)r rVrCrEr+rrreffective_widths zMargins.effective_widthcCstd||j|jS)a+ Compute height without margins. :param height: The container height. :return: The height after subtracting the top and bottom margins. :raises LayoutError: if the container height is too short to accommodate the margins. r')r rVrLrMr-rrreffective_heights zMargins.effective_heightcs$t|trttd|}t|S)N)rCrErMrL) isinstancelistdictziprr>)r= config_dictrrrr>s  zMargins.from_config)rrrrrCr%r0rErMrLrArl staticmethodrVrqrrr>rrrrrr ss         c@sneZdZUdZeed<eed<eZeed<ej Z eed<e ddZ eddd d Z eeeed d d ZdS)r zk Class describing alignment, scaling and margin rules for a box positioned inside another box. x_aligny_alignmarginsinner_content_scalingcCsz|dtj}t|tr"t|}||d<|dtj}t|trLt|}||d<|dd}|dk rvt||d<dS)Nryrzr|) getrrHrsrrKrNr r>)r=rwryrzscalingrrrprocess_entriess     z#SimpleBoxLayoutRule.process_entries) new_marginsr*cCst|j|j||jdS)N)ryrzr{r|)r ryrzr|)rrrrrsubstitute_marginss z&SimpleBoxLayoutRule.substitute_margins)rerfrir*c Cs|j}|j}d}}|tjkr|jr|jr||j}||j } |dkrR||nd}|dkrf| |nd}|tj krt ||}}n|tj krt ||d}}t |j||||j|j} t|j||||j|j} t| | ||dS)a Position and possibly scale a box within a container, according to this layout rule. :param container_box: :class:`.BoxConstraints` describing the container. :param inner_nat_width: The inner box's natural width. :param inner_nat_height: The inner box's natural height. :return: A :class:`.Positioning` describing the scaling & position of the lower left corner of the inner box. r)r]r^r_r`)r{r|r r7r,r.rqr&rrr'r9minr:rgryrCrErjrzrLrMr ) rrerfrir{r~r_r`Z eff_widthZ eff_heightr]r^rrrfitsT       zSimpleBoxLayoutRule.fitN)rrrrrr0r r{r r:r|rArrrr%r rrrrrr s  )!rr?loggingZ dataclassesrZ fractionsrtypingr__all__Zpyhanko.pdf_utils.config_utilsr r getLoggerrrW ValueErrorrrrEnumr rrHrGrIrOr r%rgrjr r rrrrsZ    /b  F