File: row_height.pl

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libpdf-table-perl 1%3A1.006-1
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#!/usr/bin/env perl
use warnings;
use strict;
use diagnostics;

# 25 rows of one text line, each with a height taller than before

use PDF::Table;
# -------------
# -A|A or -B|B on command line, ENV var, or PDFpref file to select 
#   preferred library (if available)
# then look for PDFpref file and read A or B forms
my ($PDFpref, $rcA, $rcB); # which is available?
my $prefFile = "examples/PDFpref";
my $prefix = 0;  # by default, do not add a prefix to the output name
my $prefDefault = "B"; # PDF::Builder default if no prefFile, or both installed

# command line selection of preferred library? A..., -A..., B..., or -B...
if (@ARGV) {
    # A or -A argument: set PDFpref to A else B
    if ($ARGV[0] =~ m/^-?([AB])/i) {
	$PDFpref = uc($1);
	$prefix = 1;
    } else {
	print STDERR "Unknown command line flag $ARGV[0] ignored.\n";
    }
}
# environment variable selection of preferred library?
# A..., B..., PDF:[:]A..., or PDF:[:]B...
if (!defined $PDFpref) {
    if (defined $ENV{'PDF_prefLib'}) {
        $PDFpref = $ENV{'PDF_prefLib'};
        if      ($PDFpref =~ m/^A/i) {
	    # something starting with A, assume want PDF::API2
	    $PDFpref = 'A';
        } elsif ($PDFpref =~ m/^B/i) {
	    # something starting with B, assume want PDF::Builder
	    $PDFpref = 'B';
        } elsif ($PDFpref =~ m/^PDF:{1,2}A/i) {
	    # something starting with PDF:A or PDF::A, assume want PDF::API2
	    $PDFpref = 'A';
        } elsif ($PDFpref =~ m/^PDF:{1,2}B/i) {
	    # something starting with PDF:B or PDF::B, assume want PDF::Builder
	    $PDFpref = 'B';
        }
    }
}
# PDF preference file selecting preferred library?
# A..., B..., PDF:[:]A..., or PDF:[:]B...
if (!defined $PDFpref) {
    if (-f $prefFile && -r $prefFile) {
        open my $FH, '<', $prefFile or die "error opening $prefFile: $!\n";
        $PDFpref = <$FH>;
        if      ($PDFpref =~ m/^A/i) {
	    # something starting with A, assume want PDF::API2
	    $PDFpref = 'A';
        } elsif ($PDFpref =~ m/^B/i) {
	    # something starting with B, assume want PDF::Builder
	    $PDFpref = 'B';
        } elsif ($PDFpref =~ m/^PDF:{1,2}A/i) {
	    # something starting with PDF:A or PDF::A, assume want PDF::API2
	    $PDFpref = 'A';
        } elsif ($PDFpref =~ m/^PDF:{1,2}B/i) {
	    # something starting with PDF:B or PDF::B, assume want PDF::Builder
	    $PDFpref = 'B';
        }
        close $FH;
    }
}
# still no preferred library indicated? use the default
if (!defined $PDFpref) {
        # no preference expressed, default to PDF::Builder
        print STDERR "No library preference given, so default to ".
	  (($prefDefault eq 'A')? 'PDF::API2': 'PDF::Builder')." as preferred.\n";
        $PDFpref = $prefDefault;
}

# try to use the preferred library, if available
foreach (1 .. 2) {
    if ($PDFpref eq 'A') { # A(PI2) preferred
        $rcA = eval {
            require PDF::API2;
            1;
        };
        if (!defined $rcA) { $rcA = 0; } # else is 1;
        if ($rcA) { $rcB = 0; last; }
	$PDFpref = 'B';
    } 
    if ($PDFpref eq 'B') { # B(uilder) preferred
        $rcB = eval {
            require PDF::Builder;
            1;
        };
        if (!defined $rcB) { $rcB = 0; } # else is 1;
	if ($rcB) { $rcA = 0; last; }
	$PDFpref = 'A';
    }
}
if (!$rcA && !$rcB) {
    die "Neither PDF::API2 nor PDF::Builder is installed!\n";
}
# -------------

our $VERSION = '1.006'; # VERSION
our $LAST_UPDATE = '1.006'; # manually update whenever code is changed

my $outfile = $0;
if ($outfile =~ m#[\\/]([^\\/]+)$#) { $outfile = $1; }
$outfile =~ s/\.pl$/.pdf/;
# preferred library adds A_ or B_ to outfile
if ($prefix) { $outfile = $PDFpref . "_" . $outfile; }

my $pdftable = PDF::Table->new();
# -------------
my $pdf;
if ($rcA) {
    print STDERR "Using PDF::API2 library\n";
    $pdf      = PDF::API2->new( -file => $outfile );
} else {
    print STDERR "Using PDF::Builder library\n";
    $pdf      = PDF::Builder->new( -file => $outfile );
}
# -------------
my $page     = $pdf->page();
$pdf->mediabox('A4');

# A4 as defined by PDF::API2 is h=842 w=545 for portrait

my $data = [];

# some data to layout

foreach my $num ( 1 .. 25 ) {
	push( @$data, [ 'foo' . $num, 'bar' . $num ] );
}

# ever-increasing row height
my @rows;
foreach my $num ( 0 .. 24 ) {
    push @rows, { row_height => 25 + 3*$num };
}

# build the table layout
$pdftable->table(

	# required params
	$pdf,
	$page,
	$data,
	x       => 10,
	w       => 150,
	start_y => 750,  # or y. start near top of page
	next_y  => 700,
	start_h => 200,  # or h. first page short, subsequent much longer
	next_h  => 500,

	# some optional params
	border          => 1,
	font_size       => 10,
	max_word_length => 15,
	padding         => 5,
	row_props       => \@rows,
);
$pdf->save();