글줄과 절취선을 검증하는 인쇄 레이아웃 모듈

"""Synthetic word layout and explicit PDF creation. Units are points."""
import math
A4=(595.2756,841.8898)
NOTICE='Synthetic original shapes - modify and reuse permitted - v1'
def positive(n):
 if isinstance(n,bool) or not isinstance(n,(int,float)) or not math.isfinite(n) or n<=0:raise ValueError('finite positive geometry')
 return n
def nonnegative(n):
 if isinstance(n,bool) or not isinstance(n,(int,float)) or not math.isfinite(n) or n<0:raise ValueError('finite nonnegative coordinate')
 return n
def wrap(text,width,measure,max_lines=100):
 positive(width)
 if not isinstance(text,str) or not text.strip() or not isinstance(max_lines,int) or isinstance(max_lines,bool) or max_lines<1:raise ValueError('text and bounded lines')
 words=text.split();lines=[];line=''
 for word in words:
  if measure(word)>width:raise ValueError('unbreakable word exceeds width')
  candidate=(line+' '+word).strip()
  if measure(candidate)<=width:line=candidate
  else:lines.append(line);line=word
 if line:lines.append(line)
 if len(lines)>max_lines:raise ValueError('layout needs more lines; no silent truncation')
 return lines
def baselines(top,count,leading,bottom):
 positive(top);positive(leading);nonnegative(bottom)
 if not isinstance(count,int) or isinstance(count,bool) or count<1 or bottom<0:raise ValueError('baseline contract')
 result=[top-i*leading for i in range(count)]
 if result[-1]<bottom:raise ValueError('text crosses reserved bottom')
 return result
def dashes(x1,x2,y,dash=5,gap=4):
 nonnegative(x1)
 for v in (x2,y,dash,gap):positive(v)
 if x1<0 or x2<=x1 or x2>A4[0] or y>A4[1]:raise ValueError('line outside page')
 segments=[];x=x1
 while x<x2:
  segments.append([x,min(x+dash,x2),y]);x+=dash+gap
 return segments
def make_pdf(path):
 from reportlab.pdfgen.canvas import Canvas
 from reportlab.pdfbase.pdfmetrics import stringWidth
 c=Canvas(str(path),pagesize=A4,invariant=1);c.setAuthor('Independent synthetic module');c.setCreator('Printable geometry example');c.setProducer('Synthetic geometry renderer');c.setTitle('Words and cutting lines - synthetic worksheet')
 w,h=A4;c.setFillColorRGB(.08,.22,.24);c.setFont('Helvetica-Bold',25);c.drawString(42,h-62,'Words, shapes and space')
 c.setFont('Helvetica',11);c.drawString(42,h-84,'A synthetic worksheet for inspecting line layout and cutting coordinates.')
 c.setStrokeColorRGB(.67,.76,.73);c.roundRect(42,310,w-84,390,12,stroke=1,fill=0)
 lines=wrap('Read each instruction before you cut. Match the circle to the square, then leave the triangle in the remaining space.',w-124,lambda t:stringWidth(t,'Helvetica',14))
 ys=baselines(665,len(lines),22,580);c.setFont('Helvetica',14)
 for text,y in zip(lines,ys):c.drawString(62,y,text)
 c.setStrokeColorRGB(.10,.36,.35);c.setLineWidth(2);c.circle(126,470,35,stroke=1,fill=0);c.rect(250,435,70,70,stroke=1,fill=0);p=c.beginPath();p.moveTo(420,510);p.lineTo(380,435);p.lineTo(460,435);p.close();c.drawPath(p,stroke=1,fill=0)
 c.setFont('Helvetica',11)
 for x,t in [(105,'Circle'),(267,'Square'),(400,'Triangle')]:c.drawString(x,405,t)
 c.setFont('Helvetica',10);c.drawString(42,265,'CUTTING GUIDE - dashed geometry is separate from the text frame')
 c.setLineWidth(.8)
 for x1,x2,y in dashes(42,w-42,245):c.line(x1,y,x2,y)
 c.setFont('Helvetica',10);c.drawString(42,210,'Printer scaling can change physical size. Check actual print settings separately.')
 c.setFillColorRGB(.30,.37,.37);c.setFont('Helvetica',9);c.drawString(42,54,NOTICE);c.drawRightString(w-42,35,'1 / 1');c.save()
 return dict(page=A4,lines=lines,baselines=ys,cutting_y=245,text_bottom=310,notice=NOTICE)