# -*- mode: Perl -*-
# /=====================================================================\ #
# |  colortbl                                                           | #
# | Implementation for LaTeXML                                          | #
# |=====================================================================| #
# | Part of LaTeXML:                                                    | #
# |  Public domain software, produced as part of work done by the       | #
# |  United States Government & not subject to copyright in the US.     | #
# |---------------------------------------------------------------------| #
# | Bruce Miller <bruce.miller@nist.gov>                        #_#     | #
# | http://dlmf.nist.gov/LaTeXML/                              (o o)    | #
# \=========================================================ooo==U==ooo=/ #
package LaTeXML::Package::Pool;
use strict;
use warnings;
use LaTeXML::Package;

RequirePackage('color');
RequirePackage('array');
#======================================================================
# Note that we use \pagecolor, unchanged as much as possible,
# so this should work with both color.sty and xcolor.sty!
# NOTE: if colors get used within a table,
#  perhaps we should turn OFF the header heuristics?
#  Or, at least the styling implied by the header heuristics!!!
# NOTE: LaTeX.pool should handle more of table column spacing;
#  This package could benefit.
# NOTE: We also need a means to color rules!
#======================================================================
# You can color columns (in the template), rows (individually) or cells (individually);
# cell color overrides row color overrides column color.
# cell & column seem to work out by themselves, but getting row to override
# needs a bit of help:
DefConditional('\if@@rowcolored', sub { LookupValue('tabular_row_color'); });
DefPrimitive('\@clearrowcolor', sub { AssignValue(tabular_row_color => undef, 'global'); });
AddToMacro('\@tabular@row@after', '\@clearrowcolor');

AddToMacro('\@tabular@column@before', '\@userowcolor');

DefPrimitive('\@userowcolor', sub {
    if (my $rc = LookupValue('tabular_row_color')) {
      MergeFont(background => $rc); } });
#======================================================================
# \columncolor[<model>]{<color>}[<left_overhang>][<right_overhang>]
# This is used in column spec of tabular, within a >{\columncolor...}
# so it will already get itself inserted into the tabular column's preload,
# We'll basically do the same as \cellcolor, for now, and ignore the spacing
DefMacro('\columncolor[]{}[][]',
  '\if@@rowcolored\else\ifx.#1.\pagecolor{#2}\else\pagecolor[#1]{#2}\fi\@setcellcolor\fi');

# \rowcolor[<model>]{<color>}
# Set the background color, and arrange for it to attach to the ltx:td
DefMacro('\rowcolor[]{}', '\ifx.#1.\pagecolor{#2}\else\pagecolor[#1]{#2}\fi\@setrowcolor');

# \cellcolor[<model>]{<color>}
# Set the background color (we should already be in a cell),
# but also copy it to the ltx:td!
DefMacro('\cellcolor[]{}', '\ifx.#1.\pagecolor{#2}\else\pagecolor[#1]{#2}\fi\@setcellcolor');

# Set the row's backgroundcolor from the current background color
DefConstructor('\@setrowcolor', sub {
    my ($document, %props) = @_;
    if (my $bg = $props{background}) {    # only set if explicitly set a color
      if (my $node = $document->findnode('ancestor-or-self::ltx:tr', $document->getNode)) {
        $document->setAttribute($node, backgroundcolor => $bg); } } },
  afterDigest => sub { my $bg = $_[1]->getProperty('font')->getBackground;
    $_[1]->setProperty(background => $bg);
    AssignValue(tabular_row_color => $bg, 'global'); },
  properties => { alignmentSkippable => 1 },
  alias => '');                           # Make it go away in math (?)

# Set the cell's backgroundcolor from the current background color
DefConstructor('\@setcellcolor', sub {
    my ($document, %props) = @_;
    if (my $node = $document->findnode('ancestor-or-self::ltx:td', $document->getNode)) {
      if (my $bg = $props{font} && $props{font}->getBackground) {
        $document->setAttribute($node, backgroundcolor => $bg); } } },
  properties => { alignmentSkippable => 1 },
  alias => '');                           # Make it go away in math (?)
# \arrayrulecolor
DefMacro('\arrayrulecolor[]{}', '');

# \doublerulesepcolor
DefMacro('\doublerulesepcolor[]{}', '');

# \hhline, \cline

# \minrowclearance
DefRegister('\minrowclearance' => Dimension(0));
#======================================================================
1;
