--- loncom/xml/lontable.pm 2010/08/27 09:42:49 1.12
+++ loncom/xml/lontable.pm 2011/04/13 10:08:06 1.17
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# Generating TeX tables.
#
-# $Id: lontable.pm,v 1.12 2010/08/27 09:42:49 foxr Exp $
+# $Id: lontable.pm,v 1.17 2011/04/13 10:08:06 foxr Exp $
#
#
# Copyright Michigan State University Board of Trustees
@@ -57,6 +57,7 @@ package Apache::lontable;
use strict;
use Apache::lonlatextable;
use Apache::lonnet; # for trace logging.
+use Data::Dumper;
my $tracing = 1; # Set to 1 to enable log tracing. 2 for local sub tracing.
@@ -108,7 +109,7 @@ modified by this. These configuration i
my $table = lontable::new(\%config_hash)
-=over3
+=over 3
=item alignment
@@ -211,11 +212,10 @@ of the cells in the row.
=item cells
+
Array of hashes where each element represents the data for a cell.
The contents of each element of this hash are described below:
-=over 3
-
=item header
If present, the row is a 'header' that is it was made via the
@@ -248,15 +248,13 @@ The contents of the cell.
=back
-=back
=cut
sub new {
my ($class, $configuration) = @_;
- if($tracing) {&Apache::lonnet::logthis("new table object");}
-
+ if ($tracing) {&Apache::lonnet::logthis("new table"); }
# Initialize the object member data with the default values
# then override with any stuff in $configuration.
@@ -268,7 +266,14 @@ sub new {
theme => "plain",
column_count => 0,
row_open => 0,
- rows => [],
+ rows => {
+ 'body' => [],
+ 'head' => [],
+ 'foot' => []
+ },
+ col_widths => {},
+ part => 'body' # one of 'body', 'head', 'foot'.
+
};
foreach my $key (keys %$configuration) {
@@ -347,6 +352,22 @@ Set or get the presence of a request for
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.
+Valid values for the parameter are:
+
+=over 2
+
+=item 0 - no borders present.
+
+=item 1 - All borders (borders around all four sides of the cell.
+
+=item 2 - Border at top and bottom of the cell.
+
+=item 3 - Border at the left and right sides of the cell.
+
+=item 4 - Border around groups (colgroups as well as thead/tfoot/tbody).
+
+
+=back
=head3 Examples:
@@ -416,11 +437,11 @@ sub theme {
=pod
-=head 2 width
+=head2 width
Gets and optionally sets the width of the table.
-=head 3 Examples:
+=head3 Examples:
my $newwidth = $table->width("10cm"); # 10cm width returns "10cm".
@@ -485,7 +506,7 @@ sub start_row {
}
- my $rows = $self->{'rows'};
+ my $rows = $self->{'rows'}->{$self->{'part'}};
push(@$rows, $row_hash);
$self->{"row_open"} = 1; # Row is now open and ready for business.
@@ -511,8 +532,10 @@ sub end_row {
# Mostly we need to determine if this row has the maximum
# cell count of any row in existence in the table:
-
- my $row = $self->{'rows'}->[-1];
+
+ &Apache::lonnet::logthis($self->{'part'});
+ &Apache::lonnet::logthis(Dumper($self->{'rows'}));
+ my $row = $self->{'rows'}->{$self->{'part'}}->[-1];
my $cells = $row->{'cells'};
if ($row->{'cell_width'} > $self->{'column_count'}) {
@@ -548,6 +571,7 @@ The default vertical alignment for text
"top", "bottom" or "center"
+
=back
=cut
@@ -559,7 +583,7 @@ sub configure_row {
$self->start_row();
}
- my $row = $self->{'rows'}[-1];
+ my $row = $self->{'rows'}->{$self->{'part'}}->[-1];
foreach my $config_item (keys %$config) {
$row->{$config_item} = $config->{$config_item};
}
@@ -605,8 +629,17 @@ Number of rows the cell spans.
Number of columns the cell spans.
+=item width
+
+LaTeX specification of the width of the cell.
+Note that if there is a colspan this width is going to be equally divided
+over the widths of the columnsn in the span.
+Note as well that if width specification conflict, the last one specified wins...silently.
+
=back
+=back
+
=cut
sub add_cell {
@@ -619,7 +652,7 @@ sub add_cell {
if (!$self->{'row_open'}) {
$self->start_row();
}
- my $rows = $self->{'rows'};
+ my $rows = $self->{'rows'}->{$self->{'part'}};
my $current_row = $rows->[-1];
my $current_cells = $current_row->{'cells'};
my $last_coord = $current_row->{'cell_width'};
@@ -676,11 +709,40 @@ sub add_cell {
if (defined($config)) {
foreach my $key (keys(%$config)) {
+ if ($key eq 'colspan') {
+ next if ($config->{$key} == 0);
+ }
$cell->{$key} = $config->{$key};
}
}
+
$current_row->{'cell_width'} += $cell->{'colspan'};
+
+ #
+ # Process the width if it exists. If supplied it must be of the form:
+ # float units
+ # Where units can be in, cm or mm.
+ # Regardless of the supplied units we will normalize to cm.
+ # This allows computation on units at final table generation time.
+ #
+
+ if (exists($cell->{'width'})) {
+ my $width;
+ my $widthcm;
+ $width = $config->{'width'};
+ $widthcm = $self->size_to_cm($width);
+
+ # If there's a column span, the actual width is divided by the span
+ # and applied to each of the columns in the span.
+
+ $widthcm = $widthcm / $cell->{'colspan'};
+ for (my $i = $last_coord; $i < $last_coord + $cell->{'colspan'}; $i++) {
+ $self->{'col_widths'}->{$i} = $widthcm;
+ }
+
+ }
+
push(@$current_cells, $cell);
if ($tracing) { &Apache::lonnet::logthis("add_cell done"); }
@@ -703,14 +765,178 @@ sub append_cell_text {
my ($this, $text) = @_;
if($tracing) {&Apache::lonnet::logthis("append_cell_text: $text"); }
- my $rows = $this->{'rows'};
+ my $rows = $this->{'rows'}->{$this->{'part'}};
my $current_row = $rows->[-1];
my $cells = $current_row->{'cells'};
my $current_cell = $cells->[-1];
$current_cell->{'contents'} .= $text;
}
+#-------------------------- Support for row/column groups. ----
+
+=pod
+=head2 start_head
+
+starts the table head. This corresponds to the tag in
+html/xml. All rows defined in this group will be
+collected and placed at the front of the table come rendering time.
+Furthermore, if the table has group borders enabled, a rule will be
+rendered following and preceding this group of rows.
+
+=cut
+
+sub start_head {
+ my ($this) = @_;
+ if ($tracing) { &Apache::lonnet::logthis("start_head"); }
+ $this->{'part'} = 'head';
+}
+
+=pod
+
+=head2 end_head
+
+Ends a table head. This corresponds to the
+ closing tag in html/xml.
+
+=cut
+
+sub end_head {
+ my ($this) = @_;
+ if ($tracing) { &Apache::lonnet::logthis("end_head"); }
+ $this->{'part'} = 'body';
+}
+
+=pod
+
+=head2 start_foot
+
+Starts the table footer. All of the rows generated in the footer will
+be rendered at the bottom of the table. This sub corresponds to the
+ tag in html/xml. If the table has group borders enabled, a rule
+will be rendered at the top and bottom of the set of columns in this
+group
+
+=cut
+
+sub start_foot {
+ my ($this) = @_;
+ if ($tracing) { &Apache::lonnet::logthis("start_foot"); }
+ $this->{'part'} = 'foot';
+}
+
+=pod
+
+=head2 end_foot
+
+Ends the set of rows in the table footer. This corresponds to the
+ end tag in xml/html.
+
+=cut
+
+sub end_foot {
+ my ($this) = @_;
+ if ($tracing) { &Apache::lonnet::logthis("end_foot") }
+ $this->{'part'} = 'body';
+}
+
+=pod
+
+=head2 start_body
+
+Starts the set of rows that will be in the table body. Note that if
+we are not in the header or footer, body rows are implied.
+This correspondes to the presence of a tag in html/xml.
+If group borders are on, a rule will be rendered at the top and bottom
+of the body rows.
+
+=cut
+
+sub start_body {
+ my ($this) = @_;
+ if ($tracing) { &Apache::lonnet::logthis("start_body"); }
+ $this->{'part'} = 'body';
+}
+
+=pod
+
+=head2 end_body
+
+Ends the set of rows in a table body. Note that in the event we are not
+in the header or footer groups this code assumes we are in the body
+group. I believe this is a good match to how mot browsers render.
+
+=cut
+
+sub end_body {
+ my ($this) = @_;
+ if ($tracing) { &Apache::lonnet::logthis("end_body"); }
+
+}
+
+=pod
+
+=head2 define_colgroup
+
+Define a column group a column group corresponds to the
+ tag in Html/Xml. A column group as we implement it has
+the following properties tht will be shared amongst all cells in the
+columns in the group unless overidden in the specific oell definition:
+
+=over 2
+
+=item span
+
+The number of columns in the column group. This defaults to 1.
+
+=item halign
+
+Horizontal alignment of the cells. This defaults to left.
+Other values are left, center, right (justify and char are
+accepted but treated as left).
+
+=item valign
+
+Vertical alignment of the cells. This defaults to middle.
+Other values are top middle, bottom, (baseline is accepted and
+treated as top).
+
+=back
+
+If group borders are turned on, a rule will be rendered
+at the left and right side of the column group.
+
+=head3 parameters
+
+=over 2
+
+=item definition
+
+This is a hash that contains any of the keys described above that
+define the column group.
+
+=back
+
+
+=head3 Example
+
+ $table->define_colgroup({
+ 'span' => 2,
+ 'halign' => 'center'
+ })
+
+
+
+=cut
+
+sub define_colgroup {
+ my ($this, $attributes) = @_;
+ if ($tracing) { &Apache::lonnet::logthis("col_group"); }
+
+
+}
+
+#------------------------- Render the table ---------------------
=pod
@@ -723,17 +949,25 @@ a certain amount of testing to be done o
The caller can then ask the table object to generate LaTeX.
=cut
+
sub generate {
my ($this) = @_;
my $useP = 0;
- my $colwidth;
- my $colunits;
+
+ my $colunits = 'cm'; # All widths get normalized to cm.
+ my $tablewidth;
if($tracing) {&Apache::lonnet::logthis("generate"); }
my $table = Apache::lonlatextable->new();
+ my $inner_border = $this->{'inner_border'};
+ my $outer_border = $this->{'outer_border'};
+ my $column_count = $this->{'column_count'};
-
+ my $cell_ul_border = (($inner_border == 1) || ($inner_border == 2)) ? 1 : 0;
+ my $cell_lr_border = (($inner_border == 1) || ($inner_border == 3)) ? 1 : 0;
+ my $part_border = ($inner_border == 4);
+
# Add the caption if supplied.
if ($this->{'caption'} ne "") {
@@ -742,27 +976,163 @@ sub generate {
# Set the width if defined:
+ my $default_width;
+ my $colwidths = $this->{'col_widths'};
if (defined ($this->{'width'})) {
-# $table->set_width($this->{'width'});
-# $table->set_width_environment('tabularx');
+ $tablewidth = $this->{'width'};
+ $tablewidth = $this->size_to_cm($tablewidth);
+
$useP = 1;
- ($colwidth, $colunits) = split(/ /, $this->{'width'});
- $colwidth = $colwidth/$this->{'column_count'};
+ # Figure out the default width for a column with unspecified
+ # We take the initially specified widths and sum them up.
+ # This is subtracted from total width above.
+ # If the result is negative we're going to allow a minimum of 2.54cm for
+ # each column and make the table spill appropriately.
+ # This (like a riot) is an ugly thing but I'm open to suggestions about
+ # how to handle it better (e.g. scaling down requested widths?).
+
+ my $specified_width = 0.0;
+ my $specified_cols = 0;
+ foreach my $col (keys %$colwidths) {
+ $specified_width = $specified_width + $colwidths->{$col};
+ $specified_cols++;
+ }
+ my $unspecified_cols = $this->{'column_count'} - $specified_cols;
+
+ # If zero unspecified cols, we are pretty much done... just have to
+ # adjust the total width to be specified width. Otherwise we
+ # must figure out the default width and total width:
+ #
+ my $total_width;
+ if($unspecified_cols == 0) {
+ $total_width = $specified_width;
+ } else {
+ $default_width = ($tablewidth - $specified_width)/$unspecified_cols; # Could be negative....
+ $total_width = $default_width * $unspecified_cols + $specified_width;
+ }
+
+ # if the default_width is < 0.0 the user has oversubscribed the width of the table with the individual
+ # column. In this case, we're going to maintain the desired proportions of the user's columns, but
+ # ensure that the unspecified columns get a fair share of the width..where a fair share is defined as
+ # the total width of the table / unspecified column count.
+ # We figure out what this means in terms of reducing the specified widths by dividing by a constant proportionality.
+ # Note that this cannot happen if the user hasn't specified anywidths as the computation above would then
+ # just make all columns equal fractions of the total table width.
+
+ if ($default_width < 0) {
+ $default_width = ($tablewidth/$unspecified_cols); # 'fair' default width.
+ my $width_remaining = $tablewidth - $default_width*$unspecified_cols; # What's left for the specified cols.
+ my $reduction = $tablewidth/$width_remaining; # Reduction fraction for specified cols
+ foreach my $col (keys %$colwidths) {
+ $colwidths->{$col} = $colwidths->{$col}/$reduction;
+ }
+
+ }
+ }
+
+ if ($tracing) { &Apache::lonnet::logthis("rendering head"); }
+ $this->render_part('head', $table, $useP, $default_width);
+ if ($tracing) { &Apache::lonnet::logthis("rendering body"); }
+ $this->render_part('body', $table, $useP, $default_width);
+ if ($tracing) { &Apache::lonnet::logthis("rendering footer"); }
+ $this->render_part('foot', $table, $useP, $default_width);
+
+
+
+
+
+ my $coldef = "";
+ if ($outer_border || $cell_lr_border) {
+ $coldef .= '|';
+ }
+ for (my $i =0; $i < $column_count; $i++) {
+ if ($useP) {
+ $coldef .= "p{$default_width $colunits}";
+ } else {
+ $coldef .= 'l';
+ }
+ if ($cell_lr_border ||
+ ($outer_border && ($i == $column_count-1))) {
+ $coldef .= '|';
+ }
+ }
+ $table->{'coldef'} = $coldef;
+
+ # Return the table:
+
+ if ($tracing) { &Apache::lonnet::logthis("Leaving generate"); }
+
+
+ return $table;
+
+}
+
+
+#---------------------------------------------------------------------------
+#
+# Private methods:
+#
+
+#
+# Convert size with units -> size in cm.
+# The resulting size is floating point with no units so that it can be used in
+# computation. Note that an illegal or missing unit is treated silently as
+# cm for now.
+#
+sub size_to_cm {
+ my ($this, $size_spec) = @_;
+ my ($size, $units) = split(/ /, $size_spec);
+ if (lc($units) eq 'mm') {
+ return $size / 10.0;
}
+ if (lc($units) eq 'in') {
+ return $size * 2.54;
+ }
+
+ return $size; # Default is cm.
+}
+
+#
+# Render a part of the table. The valid table parts are
+# head, body and foot. These corresopnd to the set of rows
+# define within , and
+# respectively.
+#
+sub render_part {
+ my ($this, $part, $table, $useP, $default_width) = @_;
+
+ if ($tracing) { &Apache::lonnet::logthis("render_part: $part") };
+
+ # Do nothing if that part of the table is empty:
+
+ &Apache::lonnet::logthis(Dumper($this->{'rows'}));
+ if ($this->{'rows'}->{$part} == undef) {
+ if ($tracing) {&Apache::lonnet::logthis("$part is empty"); }
+ return;
+ }
+
# Build up the data:
my @data;
- my $rows = $this->{'rows'};
+ my $colwidths = $this->{'col_widths'};
+ my $rows = $this->{'rows'}->{$part}; # TODO: Render header, body footer as groups.
my $row_count = scalar(@$rows);
my $inner_border = $this->{'inner_border'};
my $outer_border = $this->{'outer_border'};
my $column_count = $this->{'column_count'};
+ my $cell_ul_border = (($inner_border == 1) || ($inner_border == 2)) ? 1 : 0;
+ my $cell_lr_border = (($inner_border == 1) || ($inner_border == 3)) ? 1 : 0;
+ my $part_border = ($inner_border == 4);
+ my $colunits = 'cm'; # All units in cm.
+
# Add a top line if the outer or inner border is enabled:
+ # or if group rules are on.
+ #
- if ($outer_border || $inner_border) {
+ if ($outer_border || $cell_ul_border || $part_border) {
push(@data, ["\\cline{1-$column_count}"]);
}
@@ -799,8 +1169,7 @@ sub generate {
if ($halign eq 'right') {
$col_align = 'r';
- $embeddedAlignStart = '\begin{flushright} ';
- $embeddedAlignEnd = ' \end{flushright}';
+ $embeddedAlignStart = '\raggedleft';
}
if ($halign eq 'center') {
$col_align = 'c';
@@ -812,15 +1181,21 @@ sub generate {
# para mode; and wrap the contents in the start/stop stuff:
if ($useP) {
- my $cw = $colwidth * $cells->[$cell]->{'colspan'};
+ my $cw;
+ if (defined($colwidths->{$cell})) {
+ $cw = $colwidths->{$cell};
+ } else {
+ $cw = $default_width;
+ }
+ $cw = $cw * $cells->[$cell]->{'colspan'};
$col_align = "p{$cw $colunits}";
$contents = $embeddedAlignStart . $contents . $embeddedAlignEnd;
}
- if ($inner_border || ($outer_border && ($cell == 0))) {
+ if ($cell_lr_border || ($outer_border && ($cell == 0))) {
$col_align = '|'.$col_align;
}
- if ($inner_border || ($outer_border && ($cell == ($cell_count -1)))) {
+ if ($cell_lr_border || ($outer_border && ($cell == ($cell_count -1)))) {
$col_align = $col_align.'|';
}
@@ -844,7 +1219,7 @@ sub generate {
$contents .= ' \\\\';
}
}
- if ($inner_border && ($cells->[$cell]->{'rowspan'} == 1)) {
+ if ($cell_ul_border && ($cells->[$cell]->{'rowspan'} == 1)) {
my $lastcol = $nextcol -1;
push(@underlines, "\\cline{$startcol-$lastcol}");
}
@@ -855,7 +1230,7 @@ sub generate {
}
push(@data, \@row);
- if ($inner_border) {
+ if ($cell_ul_border) {
for (my $i =0; $i < scalar(@underlines); $i++) {
push(@data, [$underlines[$i]]);
}
@@ -866,37 +1241,13 @@ sub generate {
# Add bottom border if necessary: if the inner border was on, the loops above
# will have done a bottom line under the last cell.
#
- if ($outer_border && !$inner_border) {
+ if (($outer_border || $part_border) && !$cell_ul_border) {
push(@data, ["\\cline{1-$column_count}"]);
}
- $table->set_data(\@data);
-
- my $coldef = "";
- if ($outer_border || $inner_border) {
- $coldef .= '|';
- }
- for (my $i =0; $i < $column_count; $i++) {
- if ($useP) {
- $coldef .= "p{$colwidth $colunits}";
- } else {
- $coldef .= 'l';
- }
- if ($inner_border ||
- ($outer_border && ($i == $column_count-1))) {
- $coldef .= '|';
- }
- }
- $table->{'coldef'} = $coldef;
-
- # Return the table:
-
- if ($tracing) { &Apache::lonnet::logthis("Leaving generate"); }
-
-
- return $table;
-
+ $table->set_data(\@data);
}
+
#----------------------------------------------------------------------------
# The following methods allow for testability.
@@ -911,12 +1262,14 @@ sub get_row {
my ($self, $row) = @_;
if ($tracing > 1) { &Apache::lonnet::logthis("get_row"); }
- my $rows = $self->{'rows'}; # ref to an array....
+ my $rows = $self->{'rows'}->{$self->{'part'}}; # ref to an array....
return $rows->[$row]; # ref to the row hash for the selected row.
}
+
# Mandatory initialization.
BEGIN{
}
1;
__END__
+