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Add fix for table header cells (first row cells) with colspan.
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@strarsis
strarsis committed Jun 22, 2018
1 parent 8a552a1 commit 9abde20
Showing 1 changed file with 113 additions and 104 deletions.
217 changes: 113 additions & 104 deletions tablepress-rowspan-all.php
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Original file line number Diff line number Diff line change
Expand Up @@ -2,122 +2,131 @@
/*
Plugin Name: TablePress Extension: Rowspans everywhere
Description: Allows using rowspans in thead.
Version: 1.0.0
Version: 1.1.0
Author: strarsis <[email protected]>
GitHub Plugin URI: strarsis/tablepress-rowspan-all
*/

require_once 'dom_helper.php';

const TABLEPRESS_SPAN_OUTSIDE = '#outside_rowspan#';
const TABLEPRESS_ROWSPAN = '#rowspan#';
const TABLEPRESS_ROWSPAN_OUTSIDE = '#outside_rowspan#';

add_filter('tablepress_datatables_parameters', function($parameters, $table_id, $html_id, $js_options ) {
//$parameters['orderCellsTop'] = true;
return $parameters;
}, 10, 4);

// change trigger words in table header to preserve them
add_filter('tablepress_table_raw_render_data', function($table, $render_options) {

// rows
$rows = $table['data'];

// more than two row for thead + potential rowspan making sense at all
if(count($rows) <= 1) {
return $table; // skip
}

// with a tfoot, there must be at least three rows (header, middle, footer)
if( $render_options['table_head'] &&
(!$render_options['table_foot'] || $render_options['table_foot'] && count($rows) <= 2)) {

$last_row_no = 0;
for($row_no = 1; $row_no < count($rows); $row_no++) {
$row = $rows[$row_no];

for($col_no = 0; $col_no < count($row); $col_no++) {
$col = $row[$col_no];

// only continous rows after head
if($col == '#rowspan#') {
if($row_no > ($last_row_no+1)) {
return $table; // skip table
}
$last_row_no = $row_no;

$table['data'][$row_no][$col_no] = TABLEPRESS_SPAN_OUTSIDE;
// (TablePress already uses #rowspan# but only between body cells, not table head + body cells)
add_filter('tablepress_table_raw_render_data', function($table, $render_options)
{

// rows
$rows = $table['data'];

// more than two row for thead + potential rowspan making sense at all
if (count($rows) <= 1)
return $table; // skip

// with a tfoot, there must be at least three rows (header, middle, footer)
if ($render_options['table_head'] && (!$render_options['table_foot'] || $render_options['table_foot'] && count($rows) <= 2)) {

$last_row_no = 0;
for ($row_no = 1; $row_no < count($rows); $row_no++) {
$row = $rows[$row_no];

for ($col_no = 0; $col_no < count($row); $col_no++) {
$col = $row[$col_no];

// only continous rows after head
if ($col === TABLEPRESS_ROWSPAN) {
if ($row_no > ($last_row_no + 1))
return $table; // skip table

$last_row_no = $row_no;

$table['data'][$row_no][$col_no] = TABLEPRESS_ROWSPAN_OUTSIDE;
}

}

}

}


}

}

return $table;

return $table;
}, 10, 2);

// adjust tablepress markup by using the previously prepared trigger words
add_filter('tablepress_table_output', function($output, $table, $render_options) {

// table
$table = fragment_to_dom($output);
$dom = $table->ownerDocument;
$xpath = new DOMXpath($dom);

// thead
$theads = $xpath->query("//thead");
if($theads->length == 0) {
return $output; // skip
}
// thead rows + cols
$thead = $theads->item(0);
$thead_row = $dom->getElementsByTagName('thead')->item(0);
$thead_cells = $dom->getElementsByTagName('th');

// all #head_rowspan# cells
$trigger_cells = $xpath->query(".//td[not(ancestor::thead) and not(ancestor::tfoot) and text() = '" . TABLEPRESS_SPAN_OUTSIDE . "']");
$last_row_no = 0;
foreach($trigger_cells as $cell) {
// row of cell
$row = $xpath->query("parent::tr", $cell)->item(0);

// only continous rows after head (2nd test)
$row_no = dom_parent_position($row);
if($row_no > ($last_row_no+1)) {
continue;
add_filter('tablepress_table_output', function($output, $table, $render_options)
{
// table
$table = fragment_to_dom($output);
$dom = $table->ownerDocument;
$xpath = new DOMXpath($dom);

// tablepress-specific assumptions:
// - there is only one row (<tr></tr>) in table header (<thead></thead>)

// thead
$theads = $xpath->query('//thead');
if ($theads->length === 0)
return $output; // skip
$thead = $theads->item(0);

$thead_row = $thead->getElementsByTagName('tr')->item(0);
$thead_cells = $thead_row->getElementsByTagName('th');

// thead cells can also have colspan
// physical occupation map
$thead_cells_phys = array();
foreach ($thead_cells as $thead_cell_index => $thead_cell) {
$thead_cells_phys[] = $thead_cell_index; // add at least once

$thead_cell_colspan = $thead_cell->getAttribute('colspan');
if (empty($thead_cell_colspan))
continue; // skip cell
for ($cs = 0; $cs < ($thead_cell_colspan - 1); $cs++)
$thead_cells_phys[] = $thead_cell_index;
}
$last_row_no = $row_no;

// find thead cell above this cell
$cell_no = dom_parent_position($cell);
$thead_cell = $thead_cells->item($cell_no);

// update rowspan of cell
$cur_rowspan = $thead_cell->getAttribute("rowspan");
if(!$cur_rowspan) {
$cur_rowspan = 1;

// all rowspan marked cells
$trigger_cells = $xpath->query(".//td[not(ancestor::thead) and " . "not(ancestor::tfoot) and " . "text() = '" . TABLEPRESS_ROWSPAN_OUTSIDE . "']");

$last_row_no = 0;
foreach ($trigger_cells as $cell) {
// row of cell
$row = $xpath->query('parent::tr', $cell)->item(0);

// only continous rows after head (2nd test)
$row_no = dom_parent_position($row);
if ($row_no > ($last_row_no + 1))
continue;
$last_row_no = $row_no;

// find thead cell above this cell
$cell_no = dom_parent_position($cell);
$thead_cell_phys_no = $thead_cells_phys[$cell_no];
$thead_cell = $thead_cells->item($thead_cell_phys_no);

// update rowspan of cell
$cur_rowspan = $thead_cell->getAttribute('rowspan');
if (!$cur_rowspan)
$cur_rowspan = 1;

$thead_cell->setAttribute('rowspan', $cur_rowspan + 1);

// move row to thead
$thead->appendChild($row);
}
$thead_cell->setAttribute("rowspan", $cur_rowspan + 1);

// move row to thead
$thead->appendChild($row);
}

// remove the placeholder trigger word cells
// in second step because removal during iteration causes issues
foreach( $trigger_cells as $cell ) {
$cell->parentNode->removeChild($cell);
}

// change td to th for the new row
$thead_td_cells = $xpath->query('.//td', $thead);
foreach($thead_td_cells as $td_cell) {
$changed_th_cell = dom_change_tagname($td_cell, "th");
}


$newHtml = dom_to_fragment($table);
return $newHtml;

}, 10, 3);

// remove the placeholder trigger word cells
// in second step because removal during iteration causes issues
foreach ($trigger_cells as $cell)
$cell->parentNode->removeChild($cell);

// change td to th for the new row
$thead_td_cells = $xpath->query('.//td', $thead);
foreach ($thead_td_cells as $td_cell)
$changed_th_cell = dom_change_tagname($td_cell, 'th');


$newHtml = dom_to_fragment($table);
return $newHtml;
}, 3, 10);

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