___doc__=''

#odyssey.py

#

#Demo/benchmark of PDFgen rendering Homer's Odyssey.

#results on my humble P266 with 64MB:

# Without page compression:

# 239 pages in 3.76 seconds = 77 pages per second

# With textOut rather than textLine, i.e. computing width

# of every word as we would for wrapping:

# 239 pages in 10.83 seconds = 22 pages per second

# With page compression and textLine():

# 239 pages in 39.39 seconds = 6 pages per second

from reportlab.pdfgen import canvas

import time, os

from reportlab.lib.units import inch, cm

from reportlab.lib.pagesizes import A4

#precalculate some basics

top_margin = A4[1] - inch

bottom_margin = inch

left_margin = inch

right_margin = A4[0] - inch

frame_width = right_margin - left_margin

def drawPageFrame(canv):

    canv.line(left_margin, top_margin, right_margin, top_margin)

    canv.setFont('Times-Italic',12)

    canv.drawString(left_margin, top_margin + 2, "Homer's Odyssey")

    canv.line(left_margin, top_margin, right_margin, top_margin)

    canv.line(left_margin, bottom_margin, right_margin, bottom_margin)

    canv.drawCentredString(0.5*A4[0], 0.5 * inch,

               "Page %d" % canv.getPageNumber())

def run():

    started = time.time()

    canv = canvas.Canvas('odyssey.pdf')

    canv.setPageCompression(0)

    drawPageFrame(canv)

    #do some title page stuff

    canv.setFont("Times-Bold", 36)

    canv.drawCentredString(0.5 * A4[0], 7 * inch, "Homer's Odyssey")

    canv.setFont("Times-Bold", 18)

    canv.drawCentredString(0.5 * A4[0], 5 * inch, "Translated by Samuel Burton")

    canv.setFont("Times-Bold", 12)

    tx = canv.beginText(left_margin, 3 * inch)

    tx.textLine("This is a demo-cum-benchmark for PDFgen.  It renders the complete text of Homer's Odyssey")

    tx.textLine("from a text file.  On my humble P266, it does 77 pages per secondwhile creating a 238 page")

    tx.textLine("document.  If it is asked to computer text metrics, measuring the width of each word as ")

    tx.textLine("one would for paragraph wrapping, it still manages 22 pages per second.")

    tx.textLine("")

    tx.textLine("Andy Robinson, Robinson Analytics Ltd.")

    canv.drawText(tx)

    canv.showPage()

    #on with the text...

    drawPageFrame(canv)

    canv.setFont('Times-Roman', 12)

    tx = canv.beginText(left_margin, top_margin - 0.5*inch)

    for fn in ('odyssey.full.txt','odyssey.txt'):

        if os.path.isfile(fn):

            break

    data = open(fn,'r').readlines()

    for line in data:

        #this just does it the fast way...

        tx.textLine(line)

        #this forces it to do text metrics, which would be the slow

        #part if we were wrappng paragraphs.

        #canv.textOut(line)

        #canv.textLine('')

        #page breaking        

        y = tx.getY()   #get y coordinate

        if y < bottom_margin + 0.5*inch:

            canv.drawText(tx)

            canv.showPage()

            drawPageFrame(canv)

            canv.setFont('Times-Roman', 12)

            tx = canv.beginText(left_margin, top_margin - 0.5*inch)

            #page

            pg = canv.getPageNumber()

            if pg % 10 == 0:

                print 'formatted page %d' % canv.getPageNumber()

    if tx:

        canv.drawText(tx)

        canv.showPage()

        drawPageFrame(canv)

    print 'about to write to disk...'

    canv.save()

    finished = time.time()

    elapsed = finished - started

    pages = canv.getPageNumber()-1

    speed =  pages / elapsed

    print '%d pages in %0.2f seconds = %0.2f pages per second' % (

                pages, elapsed, speed)

if __name__=='__main__':

    run()