132 lines
4.8 KiB
Python
132 lines
4.8 KiB
Python
import os
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from dataclasses import dataclass, KW_ONLY
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from collections.abc import Iterator
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from reportlab.pdfgen import canvas
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from reportlab.lib.pagesizes import LETTER, A4
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from reportlab.lib.units import inch
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from reportlab.pdfbase import pdfmetrics
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from reportlab.pdfbase.ttfonts import TTFont
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from reportlab.lib.units import mm
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# Usage:
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# label = AveryLabels.AveryLabel(5160)
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# label.open( "labels5160.pdf" )
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# label.render( RenderAddress, 30 )
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# label.close()
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#
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# 'render' can either pass a callable, which receives the canvas object
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# (with X,Y=0,0 at the lower right) or a string "form" name of a form
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# previously created with canv.beginForm().
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@dataclass
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class LabelInfo:
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"""Class for modeling label info"""
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_: KW_ONLY
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labels_horizontal: int
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labels_vertical: int
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label_size: tuple[float, float]
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gutter_size: tuple[float, float]
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margin: tuple[float, float]
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pagesize: tuple[float, float]
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labelInfo: dict[str, LabelInfo] = {
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"averyL4731": LabelInfo(labels_horizontal= 7, labels_vertical= 27, label_size= (25.4*mm, 10*mm), gutter_size= (2.5*mm, 0), margin= (9*mm, 13.5*mm), pagesize= A4),
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# 2.6 x 1 address labels
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"avery5160": LabelInfo(labels_horizontal= 3, labels_vertical= 10, label_size= (187, 72), gutter_size= (11, 0), margin= (14, 36), pagesize= LETTER),
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"avery5161": LabelInfo(labels_horizontal= 2, labels_vertical= 10, label_size= (288, 72), gutter_size= (0, 0), margin= (18, 36), pagesize= LETTER),
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# 4 x 2 address labels
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"avery5163": LabelInfo(labels_horizontal= 2, labels_vertical= 5, label_size= (288, 144), gutter_size= (0, 0), margin= (18, 36), pagesize= LETTER),
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# 1.75 x 0.5 return address labels
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"avery5167": LabelInfo(labels_horizontal= 4, labels_vertical= 20, label_size= (126, 36), gutter_size= (0, 0), margin= (54, 36), pagesize= LETTER),
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# 3.5 x 2 business cards
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"avery5371": LabelInfo(labels_horizontal= 2, labels_vertical= 5, label_size= (252, 144), gutter_size= (0, 0), margin= (54, 36), pagesize= LETTER),
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}
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RETURN_ADDRESS = 5167
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BUSINESS_CARDS = 5371
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class AveryLabel:
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def __init__(self, label, **kwargs):
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data = labelInfo[label]
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self.across = data.labels_horizontal
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self.down = data.labels_vertical
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self.size = data.label_size
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self.labelsep = self.size[0]+data.gutter_size[0], self.size[1]+data.gutter_size[1]
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self.margins = data.margin
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self.topDown = True
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self.debug = False
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self.pagesize = data.pagesize
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self.position = 0
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self.__dict__.update(kwargs)
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def open(self, filename):
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self.canvas = canvas.Canvas( filename, pagesize=self.pagesize )
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if self.debug:
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self.canvas.setPageCompression( 0 )
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self.canvas.setLineJoin(1)
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self.canvas.setLineCap(1)
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def topLeft(self, x=None, y=None):
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if x == None:
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x = self.position
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if y == None:
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if self.topDown:
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x,y = divmod(x, self.down)
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else:
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y,x = divmod(x, self.across)
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return (
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self.margins[0]+x*self.labelsep[0],
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self.pagesize[1] - self.margins[1] - (y+1)*self.labelsep[1]
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)
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def advance(self):
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self.position += 1
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if self.position == self.across * self.down:
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self.canvas.showPage()
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self.position = 0
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def close(self):
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if self.position:
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self.canvas.showPage()
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self.canvas.save()
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self.canvas = None
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# To render, you can either create a template and tell me
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# "go draw N of these templates" or provide a callback.
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# Callback receives canvas, width, height.
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#
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# Or, pass a callable and an iterator. We'll do one label
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# per iteration of the iterator.
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def render( self, thing, count, *args ):
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assert callable(thing) or isinstance(thing, str)
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if isinstance(count, Iterator):
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return self.render_iterator( thing, count )
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canv = self.canvas
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for i in range(count):
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canv.saveState()
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canv.translate( *self.topLeft() )
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if self.debug:
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canv.setLineWidth( 0.25 )
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canv.rect( 0, 0, self.size[0], self.size[1] )
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if callable(thing):
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thing( canv, self.size[0], self.size[1], *args )
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elif isinstance(thing, str):
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canv.doForm(thing)
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canv.restoreState()
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self.advance()
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def render_iterator( self, func, iterator ):
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canv = self.canvas
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for chunk in iterator:
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canv.saveState()
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canv.translate( *self.topLeft() )
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if self.debug:
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canv.setLineWidth( 0.25 )
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canv.rect( 0, 0, self.size[0], self.size[1] )
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func( canv, self.size[0], self.size[1], chunk )
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canv.restoreState()
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self.advance()
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