--- loncom/xml/lontable.pm 2010/11/18 17:12:14 1.15
+++ loncom/xml/lontable.pm 2011/11/30 18:01:33 1.21
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# Generating TeX tables.
#
-# $Id: lontable.pm,v 1.15 2010/11/18 17:12:14 raeburn Exp $
+# $Id: lontable.pm,v 1.21 2011/11/30 18:01:33 raeburn Exp $
#
#
# Copyright Michigan State University Board of Trustees
@@ -108,7 +108,7 @@ modified by this. These configuration i
my $table = lontable::new(\%config_hash)
-=over3
+=over 3
=item alignment
@@ -211,11 +211,10 @@ of the cells in the row.
=item cells
+
Array of hashes where each element represents the data for a cell.
The contents of each element of this hash are described below:
-=over 3
-
=item header
If present, the row is a 'header' that is it was made via the
@@ -248,14 +247,13 @@ The contents of the cell.
=back
-=back
=cut
sub new {
my ($class, $configuration) = @_;
-
+ if ($tracing) {&Apache::lonnet::logthis("new table"); }
# Initialize the object member data with the default values
# then override with any stuff in $configuration.
@@ -267,8 +265,15 @@ sub new {
theme => "plain",
column_count => 0,
row_open => 0,
- rows => [],
- col_widths => {}
+ rows => {
+ 'body' => [],
+ 'head' => [],
+ 'foot' => []
+ },
+ col_widths => {},
+ part => 'body', # one of 'body', 'head', 'foot'.
+ colgroups => [] # Stores information about column groups.
+
};
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 +532,9 @@ 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];
+ my $row = $self->{'rows'}->{$self->{'part'}}->[-1];
my $cells = $row->{'cells'};
if ($row->{'cell_width'} > $self->{'column_count'}) {
@@ -560,7 +582,7 @@ 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};
}
@@ -615,6 +637,8 @@ Note as well that if width specification
=back
+=back
+
=cut
sub add_cell {
@@ -627,7 +651,7 @@ 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 = $current_row->{'cell_width'};
@@ -740,14 +764,180 @@ sub append_cell_text {
my ($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"); }
+ my $colgroups = $this->{'colgroups'};
+ push(@$colgroups, $attributes); # Colgroups always add at end.
+
+
+}
+
+#------------------------- Render the table ---------------------
=pod
@@ -760,6 +950,7 @@ a certain amount of testing to be done o
The caller can then ask the table object to generate LaTeX.
=cut
+
sub generate {
my ($this) = @_;
my $useP = 0;
@@ -770,8 +961,16 @@ sub generate {
if($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'};
- # Add the caption if supplied.
+ 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 "") {
$table->set_caption($this->caption);
@@ -833,22 +1032,133 @@ sub generate {
}
}
+ # If rule is groups. we need to have a
+ # list of the column numbers at which a column ends...
+ # and the coldef needs to start with a |
+ #
+ my @colgroup_ends;
+ my $colgroup_col = 0;
+ my $group = 0;
+ my $coldef = "";
+ if ($outer_border || $cell_lr_border) {
+ $coldef .= '|';
+ }
+ if ($part_border) {
+ $coldef .= '|';
+ my $colgroup_col = 0;
+ my $colgroups = $this->{'colgroups'};
+ foreach my $group (@$colgroups) {
+ if (defined $group->{'span'}) {
+ $colgroup_col += $group->{'span'};
+ } else {
+ $colgroup_col++;
+ }
+ push(@colgroup_ends, $colgroup_col);
+ }
+
+ }
+ $this->render_part('head', $table, $useP, $default_width,
+ \@colgroup_ends);
+ $this->render_part('body', $table, $useP, $default_width,
+ \@colgroup_ends);
+ $this->render_part('foot', $table, $useP, $default_width,
+ \@colgroup_ends);
-
+
+
+ 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))) {
+ $coldef .= '|';
+ }
+ if ($part_border && ($i == ($colgroup_ends[$group]-1))) {
+ $coldef .= '|';
+ $group++;
+ }
+ }
+ $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, $colgroup_ends) = @_;
+
+ if ($tracing) { &Apache::lonnet::logthis("render_part: $part") };
+
+ # Do nothing if that part of the table is empty:
+
+ if ($this->{'rows'}->{$part} == undef) {
+ if ($tracing) {&Apache::lonnet::logthis("$part is empty"); }
+ return;
+ }
+
+ my @cgends = @$colgroup_ends;
# Build up the data:
my @data;
- my $rows = $this->{'rows'};
+ my $colwidths = $this->{'col_widths'};
+ my $rows = $this->{'rows'}->{$part};
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}"]);
}
@@ -861,11 +1171,13 @@ sub generate {
my $startcol = 1;
my @underlines; # Array of \cline cells if cellborder on.
-
+ my $colgroup_count = @cgends; # Number of column groups.
+ my $cgroup = 0; # Group we are on.
+ my $cgstart = 0; # Where the next cgroup starts.
for (my $cell = 0; $cell < $cell_count; $cell++) {
my $contents = $cells->[$cell]->{'contents'};
-
+
#
# Cell alignment is the default alignment unless
# explicitly specified in the cell.
@@ -908,17 +1220,35 @@ sub generate {
$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 = $col_align.'|';
}
+ if ($part_border) {
+ if ($cell == $cgstart) {
+ $col_align = '|' . $col_align;
+ if ($cgroup < $colgroup_count) {
+ $cgstart = $cgends[$cgroup];
+ $cgroup++;
+ } else {
+ $cgstart = 1000000; # TODO: Get this logic right
+ }
+ if ($cell == ($cell_count - 1) &&
+ ($cell == ($cgstart-1))) {
+ $col_align = $col_align . '|'; # last col ends colgrp.
+ }
+ }
+ }
#factor in spans:
my $cspan = $cells->[$cell]->{'colspan'};
my $nextcol = $startcol + $cspan;
+
+ # At this point this col is the start of the span.
+ # nextcol is the end of the span.
# If we can avoid the \multicolumn directive that's best as
# that makes some things like \parpic invalid in LaTeX which
@@ -935,18 +1265,19 @@ 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}");
}
$startcol = $nextcol;
+
# Rowspans should take care of themselves.
push(@row, $contents);
}
push(@data, \@row);
- if ($inner_border) {
+ if ($cell_ul_border) {
for (my $i =0; $i < scalar(@underlines); $i++) {
push(@data, [$underlines[$i]]);
}
@@ -957,60 +1288,13 @@ sub generate {
# Add bottom border if necessary: if the inner border was on, the loops above
# will have done a bottom line under the last cell.
#
- if ($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) {
- $coldef .= "p{$default_width $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;
-
+ $table->set_data(\@data);
}
-#---------------------------------------------------------------------------
-#
-# Private methods:
-#
-#
-# Convert size with units -> size in cm.
-# The resulting size is floating point with no units so that it can be used in
-# computation. Note that an illegal or missing unit is treated silently as
-# cm for now.
-#
-sub size_to_cm {
- my ($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 $size; # Default is cm.
-}
#----------------------------------------------------------------------------
# The following methods allow for testability.
@@ -1025,7 +1309,7 @@ sub get_row {
my ($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.
}
@@ -1035,4 +1319,4 @@ BEGIN{
1;
__END__
-
+