package Excel::Template::Element::Cell::AutoSize;

use strict;

BEGIN {
    use vars qw(@ISA);
    @ISA = qw(Excel::Template::Element::Cell);

    use Excel::Template::Element::Cell;
    use Font::TTFMetrics;
}

sub render
{
    my $self = shift;
    my ($context) = @_;

    my $font_path = '/usr/share/fonts/corefonts';
    my $font_name = lc($context->active_format->{'_font'});
    $font_name .= 'bd' if $context->active_format->{'_bold'} == 700;
    my $font_size = $context->active_format->{'_size'};
    my $font = Font::TTFMetrics->new("$font_path/$font_name.ttf");

    my $dpi          = 96;
    my $units_per_em = $font->get_units_per_em();
    my $font_width   = $font->string_width($self->get_text($context));

        #The following expression is from the TTFMetrics docs.
    my $pixel_width  = $font_width *$font_size *$dpi /(72 *$units_per_
+em);

        #The following expression is from the Spreadsheet::WriteExcel 
+internals.
    my $cell_width   = (($pixel_width -5) /7) + 1; # For cell widths >
+ 1

    #Set larger column width if $cell_text_length is greater than curr
+ent max for column
    my $max_width_key = '_COL_WIDTH_' . $context->get($self, 'COL');
    #Initialize current max column width if this is our first access o
+f this column
    $context->active_worksheet->{$max_width_key} = $context->active_wo
+rksheet->{$max_width_key} || 0;
    
    #print $font_name . "," . $context->active_format->{'_bold'} . "\n
+";
    if ($cell_width > $context->active_worksheet->{$max_width_key}){
        $context->active_worksheet->{$max_width_key} = $cell_width;
        $context->active_worksheet->set_column($context->get($self, 'C
+OL'), $context->get($self, 'COL'), $cell_width);
       }
    $context->active_worksheet->write(
        (map { $context->get($self, $_) } qw(ROW COL)),
        $self->get_text($context),
        $context->active_format,
    );

    return 1;
}

1;
__END__

=head1 NAME

Excel::Template::Element::Cell::AutoSize - Excel::Template::Element::C
+ellAutoSize

=head1 PURPOSE

To provide a cell that is correctly sized for inserted text

=head1 NODE NAME

CELLAUTOSIZE

=head1 INHERITANCE

Excel::Template::Element::Cell

=head1 ATTRIBUTES

=over 4

=item * TEXT

This is the text to write to the cell. This can either be text or a pa
+rameter
with a dollar-sign in front of the parameter name.

=item * COL

Optionally, you can specify which column you want this cell to be in. 
+It can be
either a number (zero-based) or an offset. See Excel::Template for mor
+e info on
offset-based numbering.

=back 4

There will be more parameters added, as features are added.

=head1 CHILDREN

Excel::Template::Element::Formula

=head1 EFFECTS

This will consume one column on the current row. 

=head1 DEPENDENCIES

None

=head1 USAGE

  <cellautosize text="Some Text Here"/>
  <cellautosize>Some other text here</cellautosize>

  <cellautosize text="$Param2"/>
  <cellautosize>Some <var name="Param"> text here</cellautosize>

In the above example, four cells are written out. The first two have t
+ext hard-
coded. The second two have variables. The third and fourth items have 
+another
thing that should be noted. If you have text where you want a variable
+ in the
middle, you have to use the latter form. Variables within parameters a
+re the
entire parameter's value.

Please see Spreadsheet::WriteExcel for what constitutes a legal formul
+a.

=head1 BACK-REFERENCES

Currently, you can only use a hard-coded formula. The next release wil
+l add the
capability to have a formula reference other nodes in the template dyn
+amically.

=head1 AUTHOR

Tim Howell (tim@fefcful.org)
Based on Excel::Template::Element::Cell by Rob Kinyon

=head1 SEE ALSO

CELL, ROW, VAR, FORMULA

=cut
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