NAME

Text::Diff3::Text - line number scheme free text buffer

VERSION

0.08

SYNOPSIS

    use Text::Diff3;
    my $f = Text::Diff3::Factory->new;
    my $t0 = $f->create_text([ map{chomp;$_} <F0> ]); # do not dup internally.
    my $t1 = $f->create_text($string); # make array references.
    # follows four take same output.
    print $_, "\n" for @{$t0->text};
    print $t0->as_string_at($_) for $t0->range;
    print $t0->as_string_range($t0->ragne);
    print $t0->as_string_at($_) for $t0->first_index .. $t0->last_index;
    print $t0->as_string_range($t0->first_index .. $t0->last_index);
    for ($t0->first_index .. $t0->last_index) {
        my $line = $t0->at($_);
        print $line, "\n" if defined($line);
    }
    # string compare
    if ($t0->eq_at($i, $string)) { .... }
    # get string size
    my $length = $t0->size;

DESCRIPTION

This is a wrapper for a Perl's array reference, improving line number scheme free and limiting fetching from last element by minus index. Normally line number starts 1 in compatible with diff command tools. But you can change it another value like as 0 override first index methods.

create

Author recommends you to create an instance of text by using with a factory as follows.

  use SomeFactory;
  my $f = SomeFactory->new;
  my $t = $f->create_text( string or arrayref );

Text::Diff3::Factory is a class to packaging several classes for the build-in diff processor.

When pass a string, it is split by /\n/ before store the line buffers. When pass an array reference, it simply assigned text properties without duplication. In the later case, the side effects will happen if you use same reference at another place.

$obj->text

Returns the line buffer attribute. It is an array reference.

$obj->list

Same as the text property, which is an interface property for ListMixin.

$obj->first_index

Returns first-index accessible by the `at' method.

$obj->last_index

Returns last-index accessible by the `at' method.

$obj->range

Returns a range between fist-index and last-index.

$obj->at

Returns a line specified by a line number. If line number is out of range, it returns undef.

$obj->as_string_at($x)

This is short cut for line accessing through `at'. If line number is out of range, it returns '', in otherwise returns line."\n".

$obj->as_string_range(@range)

Contatinents lines in the given line number array.

$obj->eq_at($x, $other)

This is short cut for comparison line and other string.

$obj->initialize

Makes initial state.

COMPATIBILITY

Use new function style interfaces introduced from version 0.08. This module remained for backward compatibility before version 0.07. This module is no longer maintenance after version 0.08.

AUTHOR

MIZUTANI Tociyuki <tociyuki@gmail.com>.

LICENSE AND COPYRIGHT

Copyright (C) 2010 MIZUTANI Tociyuki

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.