--- loncom/xml/lontable.pm 2008/11/24 11:56:53 1.1
+++ loncom/xml/lontable.pm 2008/12/23 11:49:32 1.6
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# Generating TeX tables.
#
-# $Id: lontable.pm,v 1.1 2008/11/24 11:56:53 foxr Exp $
+# $Id: lontable.pm,v 1.6 2008/12/23 11:49:32 foxr Exp $
#
#
# Copyright Michigan State University Board of Trustees
@@ -39,7 +39,7 @@
# This module is a support packkage that helps londefdef generate
# LaTeX tables using the LaTeX::Table package. A prerequisite is that
-# the print generator must have added the following to the LaTeX header:
+# the print generator must have added the following to the LaTeX
#
# \usepackage{xtab}
# \usepackage{booktabs}
@@ -77,11 +77,6 @@ Opens a new table row.
Closes a table row.
-=item start_header
-
-Starts a new row that has the header attribute (e.g. | tagged row).
-header rows are ended with an end_row just like any ordinary row.
-
=item configure_row
Modifies a configuration item in the currently open row.
@@ -94,6 +89,10 @@ Returns the generated table string.
Configures a table's global configuration.
+=item add_cell
+
+Add and configure a cell to the current row.6
+
=back
=cut
@@ -165,6 +164,11 @@ Table caption (configurable).
Theme desired (configurable).
+=item width
+
+If defined, the width of the table (should be supplied
+in fraction of column width e.g. .75 for 75%.
+
=item row_open
True if a row is open and not yet closed.
@@ -181,21 +185,20 @@ Each row of table data is an element of
=over 3
-=item is_header
-
-True if the user wants to format this row like a header. This row will be used to generate
-the table header. All header rows will be gathered together into the table header. If there
-are multiple table headers interspersed with non table header data, this can lead to some
-surprises.
=item default_halign
-
+0
Default horizontal alignment for cells in this row.
=item default_valign
Default vertical alignment for cells in this row (may be ignored).
+=item cell_width
+
+The width of the row in cells. This is the sum of the column spans
+of the cells in the row.
+
=item cells
Array of hashes where each element represents the data for a cell.
@@ -203,6 +206,11 @@ The contents of each element of this has
=over 3
+=item header
+
+If present, the row is a 'header' that is it was made via the
+ | tag.
+
=item halign
If present, overrides the row default horizontal alignment.
@@ -220,6 +228,10 @@ If present, indicates the number of rows
If present indicates the number of columns this cell spans.
Note that a cell can span both rows and columns.
+=item start_col
+
+The starting column of the cell in the table grid.
+
=item contents
The contents of the cell.
@@ -239,7 +251,7 @@ sub new {
my $self = {
alignment => "left",
outer_border => 0,
- inner_borders => 0,
+ inner_border => 0,
caption => "",
theme => "Zurich",
column_count => 0,
@@ -256,14 +268,474 @@ sub new {
return $self;
}
+
#-------------------------------------------------------------------------
#
# Methods that get/set table global configuration.
+#
+
+=pod
+
+=head2 Gets/set alignment.
+
+If the method is passed a new alignment value, that replaces the current one.
+Regardless, the current alignment is used:
+
+=head3 Examples:
+
+ my $align = $table->alignment(); # Return current alignment
+ $table->alignment("center"); # Attempt centered alignment.
+
+=cut
+
+sub alignment {
+ my ($self, $new_value) = @_;
+
+ if (defined($new_value)) {
+ $self->{'alignment'} = $new_value;
+ }
+ return $self->{'alignment'};
+}
+
+=pod
+
+=head2 table_border
+
+Set or get the presence of an outer border in the table.
+If passed a parameter, that parameter replaces the current request
+for or not for an outer border. Regardless, the function returns
+the final value of the outer_border request.
+
+=head3 Examples:
+
+ $table->table_border(1); # Request an outer border.
+ my $outer_requested = $table->table_border();
+
+=cut
+
+sub table_border {
+ my ($self, $new_value) = @_;
+
+ if (defined($new_value)) {
+ $self->{'outer_border'} = $new_value;
+ }
+ return $self->{'outer_border'};
+}
+
+
+=pod
+
+=head2 cell_border
+
+Set or get the presence of a request for cells to have borders
+drawn around them. If a paramter is passed, it will be treated as
+a new value for the cell border configuration. Regardless,the final
+value of that configuration parameter is returned.
+
+=head3 Examples:
+
+ my $cell_border = $table->cell_border(); # ask if cell borders are requested.
+ $table->cell_border(1); # Request cell borders.
+
+=cut
+
+sub cell_border {
+ my ($self, $new_value) = @_;
+
+ if (defined($new_value)) {
+ $self->{'inner_border'} = $new_value;
+ }
+ return $self->{'inner_border'};
+}
+
+=pod
+
+=head2 caption
+
+Gets and/or sets the caption string for the table. The caption string appears to label
+the table. If a parameter is supplied it will become the new caption string.k
+
+=head3 Examples:
+
+
+ $my caption = $table->caption();
+ $table->caption("This is the new table caption");
+
+=cut
+
+sub caption {
+ my ($self, $new_value) = @_;
+
+ if (defined($new_value)) {
+ $self->{'caption'} = $new_value;
+ }
+
+ return $self->{'caption'};
+}
+
+=pod
+
+=head2 theme
+
+Gets and optionally sets the table theme. The table theme describes how the
+table will be typset by the table package. If a parameter is supplied it
+will be the new theme selection.
+
+=head3 Examples:
+
+ my $theme = $table->theme();
+ $table->theme("Dresden");
+
+=cut
+
+sub theme {
+ my ($self, $new_value) = @_;
+
+ if (defined($new_value)) {
+ $self->{'theme'} = $new_value;
+ }
+ return $self->{'theme'};
+}
+
+=pod
+
+=head2 start_row
+
+Begins a new row in the table. If a row is already open, that row is
+closed off prior to starting the new row. Rows can have the following attributes
+which are specified by an optional hash passed in to this function.
+
+=over 3
+
+=item default_halign
+
+The default horizontal alignment of the row. This can be "left", "center", or "right"
+
+=item default_valign
+
+The default vertical alignment of the row. This can be "top", "center", or "bottom"
+
+=back
+
+=head3 Examples:
+
+ $table_start_row(); # no attributes.
+ $table_start({default_halign => "center",
+ default_valign => "bottom"}); # Create setting the attrbutes.
+
+=cut
+
+sub start_row {
+ my ($self, $config) = @_;
+
+ if ($self->{'row_open'}) {
+ $self->end_row();
+ }
+ my $row_hash = {
+ default_halign => "left",
+ default_valign => "top",
+ cell_width => 0,
+ cells => []
+ };
+ # Override the defaults if the config hash is present:
+ if (defined($config)) {
+ foreach my $key (keys %$config) {
+ $row_hash->{$key} = $config->{$key};
+ }
+ }
+
+
+ my $rows = $self->{'rows'};
+ push(@$rows, $row_hash);
+
+ $self->{"row_open"} = 1; # Row is now open and ready for business.
+}
+
+=pod
+
+=head2 end_row
+
+Closes off a row. Once closed, cells cannot be added to this row again.
+
+=head3 Examples:
+
+ $table->end_row();
+
+
+=cut
+
+sub end_row {
+ my ($self) = @_;
+
+ if ($self->{'row_open'}) {
+
+ # Mostly we need to determine if this row has the maximum
+ # cell count of any row in existence in the table:
+
+ my $row = $self->{'rows'}->[-1];
+ my $cells = $row->{'cells'};
+
+ if ($row->{'cell_width'} > $self->{'column_count'}) {
+ $self->{'column_count'} = $row->{'cell_width'};
+ }
+
+ $self->{'row_open'} = 0;;
+ }
+}
+
+=pod
+
+=head2 configure_row
+
+Modify the configuration of a row. If a row is not open, a new one will be opened.
+
+=head3 Parameters:
+
+config_hash - A hash that contains new values for the set of row confiuguration
+items to be modified. There is currently no check/penalty for items that are not in
+the set of defined configuration properties which are:
+
+=over 2
+
+=item default_halign
+
+The default horizontal alignment for text in cells in the row. This can be any of:
+"left", "right" or "center".
+
+=item default_valign
+
+The default vertical alignment for text in cells in the row. This can be any of:
+
+"top", "bottom" or "center"
+
+=back
+
+=cut
+
+sub configure_row {
+ my ($self, $config) = @_;
+
+ if (!$self->{'row_open'}) {
+ $self->start_row();
+ }
+
+ my $row = $self->{'rows'}[-1];
+ foreach my $config_item (keys %$config) {
+ $row->{$config_item} = $config->{$config_item};
+ }
+}
+
+
+=pod
+
+=head2 add_cell
+
+Add a new cell to a row. If there is a row above us, we need to
+watch out for row spans that may force additional blank cell entries
+to fill in the span.
+
+=head3 Parameters:
+
+=over 2
+
+=item text
+
+Text to put in the cell.
+
+=item cell_config
+
+Hash of configuration options that override the defaults. The recognized options,
+and their defaults are:
+=over 2
+=item halign
+
+If nonblank overrides the row's default for the cell's horizontal alignment.
+
+=item valign
+
+If nonblank, overrides the row's default for the cdell's vertical alignment.
+
+=item rowspan
+
+Number of rows the cell spans.
+
+=item colspan
+
+Number of columns the cell spans.
+
+=back
+
+=cut
+
+sub add_cell {
+ my ($self, $text, $config) = @_;
+
+ # If a row is not open, we must open it:
+
+ if (!$self->{'row_open'}) {
+ $self->start_row();
+ }
+ my $rows = $self->{'rows'};
+ my $current_row = $rows->[-1];
+ my $current_cells = $current_row->{'cells'};
+ my $last_coord = $current_row->{'cell_width'};
+
+ # We have to worry about row spans if there is a prior row:
+
+ if (scalar(@$rows) > 1) {
+
+ my $last_row = $rows->[-2];
+ if ($last_coord < $last_row->{'cell_width'}) {
+ my $prior_coord = 0;
+ my $prior_cell_index = 0;
+ while ($prior_coord <= $last_coord) {
+
+ # Pull a cell down if it's coord matches our start coord
+ # And there's a row span > 1.
+ # Having done so, we adjust our $last_coord to match the
+ # end point of the pulled down cell.
+
+ my $prior_cell = $last_row->{'cells'}->[$prior_cell_index];
+ if (($prior_cell->{'start_col'} == $last_coord) &&
+ ($prior_cell->{'rowspan'} > 1)) {
+
+ # Need to drop the cell down
+
+ my %dropped_down_cell = %$prior_cell;
+ $dropped_down_cell{'rowspan'}--;
+ $dropped_down_cell{'contents'} = '';
+
+ push(@$current_cells, \%dropped_down_cell);
+ $last_coord += $dropped_down_cell{'colspan'};
+ $current_row->{'cell_width'} = $last_coord;
+
+ }
+ $prior_coord += $prior_cell->{'colspan'};
+ $prior_cell_index++;
+ }
+ }
+
+ }
+
+ #
+ # Now we're ready to build up our cell:
+
+ my $cell = {
+ rowspan => 1,
+ colspan => 1,
+ start_col => $last_coord,
+ contents => $text
+ };
+
+ if (defined($config)) {
+ foreach my $key (keys(%$config)) {
+ $cell->{$key} = $config->{$key};
+ }
+ }
+ $current_row->{'cell_width'} += $cell->{'colspan'};
+
+ push(@$current_cells, $cell);
+}
+
+=pod
+
+=head2 generate
+
+Call this when the structures for the table have been built.
+This will generate and return the table object that can be used
+to generate the table. Returning the table object allows for
+a certain amount of testing to be done on the generated table.
+The caller can then ask the table object to generate LaTeX.
+
+=cut
+sub generate {
+ my ($this) = @_;
+
+ my $table = LaTeX::Table->new();
+
+ # Build up the data:
+
+ my @data;
+ my $rows = $this->{'rows'};
+ my $row_count = scalar(@$rows);
+ my $inner_border = $this->{'inner_border'};
+ my $outer_border = $this->{'outer_border'};
+ my $column_count = $this->{'column_count'};
+
+ for (my $row = 0; $row < $row_count; $row++) {
+ my @row;
+ my $cells = $rows->[$row]->{'cells'};
+ my $cell_count = scalar(@$cells);
+ my $startcol = 1;
+ my @underlines; # Array of \cline cells if cellborder on.
+
+ for (my $cell = 0; $cell < $cell_count; $cell++) {
+ my $contents = $cells->[$cell]->{'contents'};
+ my $cspan = $cells->[$cell]->{'colspan'};
+ my $nextcol = $startcol + $cspan;
+ if ($cspan > 1) {
+ $contents = '\multicolumn{'.$cspan.'}{|l|}{'.$contents.'}';
+ }
+ if ($inner_border && ($cells->[$cell]->{'rowspan'} == 1)) {
+ my $lastcol = $nextcol -1;
+ push(@underlines, "\\cline{$startcol-$lastcol}");
+ }
+ $startcol = $nextcol;
+ # Rowspans should take care of themselves.
+
+
+ push(@row, $contents);
+
+ }
+ push(@data, \@row);
+ if ($inner_border) {
+ for (my $i =0; $i < scalar(@underlines); $i++) {
+ push(@data, [$underlines[$i]]);
+ }
+ }
+
+ }
+ $table->set_data(\@data);
+
+ my $coldef = "";
+ if ($outer_border || $inner_border) {
+ $coldef .= '|';
+ }
+ for (my $i =0; $i < $column_count; $i++) {
+ $coldef .= 'l';
+ if ($inner_border ||
+ ($outer_border && ($i == $column_count-1))) {
+ $coldef .= '|';
+ }
+ }
+ $table->{'coldef'} = $coldef;
+
+ # Return the table:
+
+ return $table;
+
+}
+#----------------------------------------------------------------------------
+# The following methods allow for testability.
+
+
+sub get_object_attribute {
+ my ($self, $attribute) = @_;
+ return $self->{$attribute};
+}
+
+sub get_row {
+ my ($self, $row) = @_;
+ my $rows = $self->{'rows'}; # ref to an array....
+ return $rows->[$row]; # ref to the row hash for the selected row.
+}
# Mandatory initialization.
+BEGIN{
+}
1;
__END__
|