class.ilPCTable.php

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<?php

/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once("./Services/COPage/classes/class.ilPageContent.php");

class ilPCTable extends ilPageContent
{
    public $dom;
    public $tab_node;


    public function init()
    {
        $this->setType("tab");
    }

    public function setNode($a_node)
    {
        parent::setNode($a_node);               // this is the PageContent node
        $this->tab_node = $a_node->first_child();               // this is the Table node
    }

    public function create(&$a_pg_obj, $a_hier_id, $a_pc_id = "")
    {
        $this->node = $this->createPageContentNode();
        $a_pg_obj->insertContent($this, $a_hier_id, IL_INSERT_AFTER, $a_pc_id);
        $this->tab_node = $this->dom->create_element("Table");
        $this->tab_node = $this->node->append_child($this->tab_node);
        $this->tab_node->set_attribute("Language", "");
    }

    public function &addRow()
    {
        $new_tr = $this->dom->create_element("TableRow");
        $new_tr = &$this->tab_node->append_child($new_tr);
        return $new_tr;
    }

    public function &addCell(&$aRow, $a_data = "", $a_lang = "")
    {
        $new_td = $this->dom->create_element("TableData");
        $new_td = $aRow->append_child($new_td);
        
        // insert data if given
        if ($a_data != "") {
            $new_pg = $this->createPageContentNode(false);
            $new_par = $this->dom->create_element("Paragraph");
            $new_par = $new_pg->append_child($new_par);
            $new_par->set_attribute("Language", $a_lang);
            $new_par->set_attribute("Characteristic", "TableContent");
            $new_par->set_content($a_data);
            $new_td->append_child($new_pg);
        }
        
        return $new_td;
    }

    public function addRows($a_nr_rows, $a_nr_cols)
    {
        for ($i=1; $i<=$a_nr_rows; $i++) {
            $aRow = $this->addRow();
            for ($j=1; $j<=$a_nr_cols; $j++) {
                $this->addCell($aRow);
            }
        }
    }
    
    public function importSpreadsheet($a_lang, $a_data)
    {
        str_replace($a_data, "\r", "\n");
        str_replace($a_data, "\n\n", "\n");
        $target_rows = array();
        $rows = explode("\n", $a_data);

        // get maximum of cols in a row and
        // put data in target_row arrays
        foreach ($rows as $row) {
            $cells = explode("\t", $row);
            $max_cols = ($max_cols > count($cells))
                ? $max_cols
                : count($cells);
            $target_rows[] = $cells;
        }

        // iterate target row arrays and insert data
        foreach ($target_rows as $row) {
            $aRow = $this->addRow();
            for ($j=0; $j<$max_cols; $j++) {
                // mask html
                $data = str_replace("&", "&amp;", $row[$j]);
                $data = str_replace("<", "&lt;", $data);
                $data = str_replace(">", "&gt;", $data);

                $this->addCell($aRow, $data, $a_lang);
            }
        }
    }

    public function getLanguage()
    {
        return $this->getTableAttribute("Language");
    }

    public function setLanguage($a_lang)
    {
        if ($a_lang != "") {
            $this->setTableAttribute("Language", $a_lang);
        }
    }

    public function getWidth()
    {
        return $this->getTableAttribute("Width");
    }

    public function setWidth($a_width)
    {
        $this->setTableAttribute("Width", $a_width);
    }

    public function getBorder()
    {
        return $this->getTableAttribute("Border");
    }

    public function setBorder($a_border)
    {
        $this->setTableAttribute("Border", $a_border);
    }

    public function getCellSpacing()
    {
        return $this->getTableAttribute("CellSpacing");
    }

    public function setCellSpacing($a_spacing)
    {
        $this->setTableAttribute("CellSpacing", $a_spacing);
    }

    public function getCellPadding()
    {
        return $this->getTableAttribute("CellPadding");
    }

    public function setCellPadding($a_padding)
    {
        $this->setTableAttribute("CellPadding", $a_padding);
    }

    public function setHorizontalAlign($a_halign)
    {
        $this->tab_node->set_attribute("HorizontalAlign", $a_halign);
    }

    public function getHorizontalAlign()
    {
        return $this->getTableAttribute("HorizontalAlign");
    }

    public function setTDWidth($a_hier_id, $a_width, $a_pc_id = "")
    {
        $xpc = xpath_new_context($this->dom);

        if ($a_pc_id == "") {
            $path = "//TableData[@HierId = '" . $a_hier_id . "']";
        } else {
            $path = "//TableData[@PCID = '" . $a_pc_id . "']";
        }
        $res = xpath_eval($xpc, $path);

        if (count($res->nodeset) == 1) {
            if ($a_width != "") {
                $res->nodeset[0]->set_attribute("Width", $a_width);
            } else {
                if ($res->nodeset[0]->has_attribute("Width")) {
                    $res->nodeset[0]->remove_attribute("Width");
                }
            }
        }
    }
    
    public function setTDSpans($a_colspans, $a_rowspans)
    {
        $y = 0;
        $rows = $this->tab_node->child_nodes();
        foreach ($rows as $row) {
            if ($row->node_name() == "TableRow") {
                $x = 0;
                $cells = $row->child_nodes();
                foreach ($cells as $cell) {
                    if ($cell->node_name() == "TableData") {
                        $ckey = $cell->get_attribute("HierId") . ":" . $cell->get_attribute("PCID");
                        if ((int) $a_colspans[$ckey] > 1) {
                            $cell->set_attribute("ColSpan", (int) $a_colspans[$ckey]);
                        } else {
                            if ($cell->has_attribute("ColSpan")) {
                                $cell->remove_attribute("ColSpan");
                            }
                        }
                        if ((int) $a_rowspans[$ckey] > 1) {
                            $cell->set_attribute("RowSpan", (int) $a_rowspans[$ckey]);
                        } else {
                            if ($cell->has_attribute("RowSpan")) {
                                $cell->remove_attribute("RowSpan");
                            }
                        }
                    }
                    $x++;
                }
                $y++;
            }
        }
        $this->fixHideAndSpans();
    }
    
    public function fixHideAndSpans()
    {
        
        // first: get max x and y
        $max_x = $max_y = 0;
        $y = 0;
        $rows = $this->tab_node->child_nodes();

        foreach ($rows as $row) {
            if ($row->node_name() == "TableRow") {
                $x = 0;
                $cells = $row->child_nodes();
                foreach ($cells as $cell) {
                    if ($cell->node_name() == "TableData") {
                        $max_x = max($max_x, $x);
                        $max_y = max($max_y, $y);
                    }
                    $x++;
                }
                $y++;
            }
        }

        // second: fix hidden/colspans for all cells
        $y = 0;
        $rows = $this->tab_node->child_nodes();
        foreach ($rows as $row) {
            if ($row->node_name() == "TableRow") {
                $x = 0;
                $cells = $row->child_nodes();
                foreach ($cells as $cell) {
                    if ($cell->node_name() == "TableData") {
                        $cspan = max(1, (int) $cell->get_attribute("ColSpan"));
                        $rspan = max(1, (int) $cell->get_attribute("RowSpan"));
                        
                        // if col or rowspan is to high: reduce it to the max
                        if ($cspan > $max_x - $x + 1) {
                            $cell->set_attribute("ColSpan", $max_x - $x + 1);
                            $cspan = $max_x - $x + 1;
                        }
                        if ($rspan > $max_y - $y + 1) {
                            $cell->set_attribute("RowSpan", $max_y - $y + 1);
                            $rspan = $max_y - $y + 1;
                        }
                        
                        // check hidden status
                        if ($this->checkCellHidden($colspans, $rowspans, $x, $y)) {
                            // hidden: set hidden flag, remove col and rowspan
                            $cell->set_attribute("Hidden", "Y");
                            $cspan = 1;
                            $rspan = 1;
                            if ($cell->has_attribute("ColSpan")) {
                                $cell->remove_attribute("ColSpan");
                            }
                            if ($cell->has_attribute("RowSpan")) {
                                $cell->remove_attribute("RowSpan");
                            }
                            $this->makeEmptyCell($cell);
                        } else {
                            // not hidden: remove hidden flag if existing
                            if ($cell->has_attribute("Hidden")) {
                                $cell->remove_attribute("Hidden");
                            }
                        }
                        
                        $colspans[$x][$y] = $cspan;
                        $rowspans[$x][$y] = $rspan;
                    }
                    $x++;
                }
                $y++;
            }
        }
    }

    
    public function makeEmptyCell($td_node)
    {
        // delete children of paragraph node
        $children = $td_node->child_nodes();
        for ($i=0; $i<count($children); $i++) {
            $td_node->remove_child($children[$i]);
        }
    }

    public function checkCellHidden($colspans, $rowspans, $x, $y)
    {
        for ($i = 0; $i<=$x; $i++) {
            for ($j = 0; $j<=$y; $j++) {
                if ($i != $x || $j != $y) {
                    if ((($i + $colspans[$i][$j] > $x) &&
                        ($j + $rowspans[$i][$j] > $y))) {
                        return true;
                    }
                }
            }
        }
        return false;
    }
    
    public function getAllCellClasses()
    {
        $classes = array();
        $rows = $this->tab_node->child_nodes();
        foreach ($rows as $row) {
            if ($row->node_name() == "TableRow") {
                $cells = $row->child_nodes();
                foreach ($cells as $cell) {
                    if ($cell->node_name() == "TableData") {
                        $classes[$cell->get_attribute("HierId") . ":" . $cell->get_attribute("PCID")]
                            = $cell->get_attribute("Class");
                    }
                }
            }
        }
        
        return $classes;
    }

    public function getAllCellAlignments()
    {
        $classes = array();
        $rows = $this->tab_node->child_nodes();
        foreach ($rows as $row) {
            if ($row->node_name() == "TableRow") {
                $cells = $row->child_nodes();
                foreach ($cells as $cell) {
                    if ($cell->node_name() == "TableData") {
                        $classes[$cell->get_attribute("HierId") . ":" . $cell->get_attribute("PCID")]
                            = $cell->get_attribute("HorizontalAlign");
                    }
                }
            }
        }

        return $classes;
    }

    public function getAllCellSpans()
    {
        $spans = array();
        $rows = $this->tab_node->child_nodes();
        $y = 0;
        $max_x = 0;
        $max_y = 0;
        foreach ($rows as $row) {
            if ($row->node_name() == "TableRow") {
                $x = 0;
                $cells = $row->child_nodes();
                foreach ($cells as $cell) {
                    if ($cell->node_name() == "TableData") {
                        $spans[$cell->get_attribute("HierId") . ":" . $cell->get_attribute("PCID")]
                            = array("x" => $x, "y" => $y, "colspan" => $cell->get_attribute("ColSpan"),
                                "rowspan" => $cell->get_attribute("RowSpan"));
                        $max_x = max($max_x, $x);
                        $max_y = max($max_y, $y);
                    }
                    $x++;
                }
                $y++;
            }
        }
        foreach ($spans as $k => $v) {
            $spans[$k]["max_x"] = $max_x;
            $spans[$k]["max_y"] = $max_y;
        }
        
        return $spans;
    }

    public function getAllCellWidths()
    {
        $widths = array();
        $rows = $this->tab_node->child_nodes();
        foreach ($rows as $row) {
            if ($row->node_name() == "TableRow") {
                $cells = $row->child_nodes();
                foreach ($cells as $cell) {
                    if ($cell->node_name() == "TableData") {
                        $widths[$cell->get_attribute("HierId") . ":" . $cell->get_attribute("PCID")]
                            = $cell->get_attribute("Width");
                    }
                }
            }
        }
        
        return $widths;
    }

    public function setTDClass($a_hier_id, $a_class, $a_pc_id = "")
    {
        $xpc = xpath_new_context($this->dom);
        if ($a_pc_id == "") {
            $path = "//TableData[@HierId = '" . $a_hier_id . "']";
        } else {
            $path = "//TableData[@PCID = '" . $a_pc_id . "']";
        }
        $res = xpath_eval($xpc, $path);
        if (count($res->nodeset) == 1) {
            if ($a_class != "") {
                $res->nodeset[0]->set_attribute("Class", $a_class);
            } else {
                if ($res->nodeset[0]->has_attribute("Class")) {
                    $res->nodeset[0]->remove_attribute("Class");
                }
            }
        }
    }

    public function setTDAlignment($a_hier_id, $a_class, $a_pc_id = "")
    {
        $xpc = xpath_new_context($this->dom);
        if ($a_pc_id == "") {
            $path = "//TableData[@HierId = '" . $a_hier_id . "']";
        } else {
            $path = "//TableData[@PCID = '" . $a_pc_id . "']";
        }
        $res = xpath_eval($xpc, $path);
        if (count($res->nodeset) == 1) {
            if ($a_class != "") {
                $res->nodeset[0]->set_attribute("HorizontalAlign", $a_class);
            } else {
                if ($res->nodeset[0]->has_attribute("HorizontalAlign")) {
                    $res->nodeset[0]->remove_attribute("HorizontalAlign");
                }
            }
        }
    }

    public function getCaption()
    {
        $hier_id = $this->getHierId();
        if (!empty($hier_id)) {
            $xpc = xpath_new_context($this->dom);
            $path = "//PageContent[@HierId = '" . $hier_id . "']/Table/Caption";
            $res = xpath_eval($xpc, $path);

            if (count($res->nodeset) == 1) {
                return $res->nodeset[0]->get_content();
            }
        }
    }

    public function getCaptionAlign()
    {
        $hier_id = $this->getHierId();
        if (!empty($hier_id)) {
            $xpc = xpath_new_context($this->dom);
            $path = "//PageContent[@HierId = '" . $hier_id . "']/Table/Caption";
            $res = xpath_eval($xpc, $path);
            if (count($res->nodeset) == 1) {
                return $res->nodeset[0]->get_attribute("Align");
            }
        }
    }

    public function setCaption($a_content, $a_align)
    {
        if ($a_content != "") {
            ilDOMUtil::setFirstOptionalElement(
                $this->dom,
                $this->tab_node,
                "Caption",
                array("Summary", "TableRow"),
                $a_content,
                array("Align" => $a_align)
            );
        } else {
            ilDOMUtil::deleteAllChildsByName($this->tab_node, array("Caption"));
        }
    }


    public function importTableAttributes(&$node)
    {
        /*echo "importing table attributes";
        var_dump($tableNode);*/
        if ($node->has_attributes()) {
            foreach ($node->attributes() as $n) {
                switch (strtolower($n->node_name())) {
                    case "border":
                    $this->setBorder($this->extractText($n));
                    break;
                    case "align":
                    $this->setHorizontalAlign(ucfirst(strtolower($this->extractText($n))));
                    break;
                    case "cellspacing":
                    $this->setCellSpacing($this->extractText($n));
                    break;
                    case "cellpadding":
                    $this->setCellPadding($this->extractText($n));
                    break;
                    case "width":
                    $this->setWidth($this->extractText($n));
                    break;

                }
            }
        }
    }


    public function importCellAttributes(&$node, &$par)
    {
        /*echo "importing table attributes";
        var_dump($tableNode);*/
        if ($node->has_attributes()) {
            foreach ($node->attributes() as $n) {
                switch (strtolower($n->node_name())) {
                    case "class":
                    $par->set_attribute("Class", $this->extractText($n));
                    break;
                    case "width":
                    $par->set_attribute("Width", $this->extractText($n));
                    break;
                }
            }
        }
    }


    public function importRow($lng, &$node)
    {
        /*echo "add Row";
        var_dump($node);*/

        $aRow = $this->addRow();

        if ($node->has_child_nodes()) {
            foreach ($node->child_nodes() as $n) {
                if ($n->node_type() == XML_ELEMENT_NODE &&
                strcasecmp($n->node_name(), "td") == 0) {
                    $this->importCell($lng, $n, $aRow);
                }
            }
        }
    }

    public function importCell($lng, &$cellNode, &$aRow)
    {
        /*echo "add Cell";
        var_dump($cellNode);*/
        $aCell = $this->addCell($aRow);
        $par = new ilPCParagraph($this->getPage());
        $par->createAtNode($aCell);
        $par->setText($par->input2xml($this->extractText($cellNode)));
        $par->setCharacteristic("TableContent");
        $par->setLanguage($lng);
        $this->importCellAttributes($cellNode, $aCell);
    }

    public function extractText(&$node)
    {
        $owner_document = $node->owner_document();
        $children = $node->child_nodes();
        $total_children = count($children);
        for ($i = 0; $i < $total_children; $i++) {
            $cur_child_node = $children[$i];
            $output .= $owner_document->dump_node($cur_child_node);
        }
        return $output;
    }

    public function importHtml($lng, $htmlTable)
    {
        $dummy = ilUtil::stripSlashes($htmlTable, false);
        //echo htmlentities($dummy);
        $dom = @domxml_open_mem($dummy, DOMXML_LOAD_PARSING, $error);

        if ($dom) {
            $xpc = @xpath_new_context($dom);
            // extract first table object
            $path = "//table[1] | //Table[1]";
            $res = @xpath_eval($xpc, $path);

            if (count($res->nodeset) == 0) {
                $error = "Could not find a table root node";
            }

            if (empty($error)) {
                for ($i = 0; $i < count($res->nodeset); $i++) {
                    $node = $res->nodeset[$i];

                    $this->importTableAttributes($node);

                    if ($node->has_child_nodes()) {
                        foreach ($node->child_nodes() as $n) {
                            if ($n->node_type() == XML_ELEMENT_NODE &&
                            strcasecmp($n->node_name(), "tr") == 0) {
                                $this->importRow($lng, $n);
                            }
                        }
                    }
                }
            }
            $dom->free();
        }
        if (is_array($error)) {
            $errmsg = "";
            foreach ($error as $errorline) {    # Loop through all errors
                $errmsg .=  "[" . $errorline['line'] . ", " . $errorline['col'] . "]: " . $errorline['errormessage'] . " at Node '" . $errorline['nodename'] . "'<br />";
            }
        } else {
            $errmsg = $error;
        }
        
        if (empty($errmsg)) {
            return true;
        }
        
        $_SESSION["message"] = $errmsg;
        return false;
    }
    
    public function setFirstRowStyle($a_class)
    {
        $childs = $this->tab_node->child_nodes();
        foreach ($childs as $child) {
            if ($child->node_name() == "TableRow") {
                $gchilds = $child->child_nodes();
                foreach ($gchilds as $gchild) {
                    if ($gchild->node_name() == "TableData") {
                        $gchild->set_attribute("Class", $a_class);
                    }
                }
                return;
            }
        }
    }
    
    public function setClass($a_class)
    {
        $this->setTableAttribute("Class", $a_class);
    }

    public function getClass()
    {
        return $this->getTableAttribute("Class");
    }

    public function setTemplate($a_template)
    {
        $this->setTableAttribute("Template", $a_template);
    }

    public function getTemplate()
    {
        return $this->getTableAttribute("Template");
    }

    public function setHeaderRows($a_nr)
    {
        $this->setTableAttribute("HeaderRows", $a_nr);
    }

    public function getHeaderRows()
    {
        return $this->getTableAttribute("HeaderRows");
    }

    public function setFooterRows($a_nr)
    {
        $this->setTableAttribute("FooterRows", $a_nr);
    }

    public function getFooterRows()
    {
        return $this->getTableAttribute("FooterRows");
    }

    public function setHeaderCols($a_nr)
    {
        $this->setTableAttribute("HeaderCols", $a_nr);
    }

    public function getHeaderCols()
    {
        return $this->getTableAttribute("HeaderCols");
    }

    public function setFooterCols($a_nr)
    {
        $this->setTableAttribute("FooterCols", $a_nr);
    }

    public function getFooterCols()
    {
        return $this->getTableAttribute("FooterCols");
    }

    protected function setTableAttribute($a_attr, $a_value)
    {
        if (!empty($a_value)) {
            $this->tab_node->set_attribute($a_attr, $a_value);
        } else {
            if ($this->tab_node->has_attribute($a_attr)) {
                $this->tab_node->remove_attribute($a_attr);
            }
        }
    }

    public function getTableAttribute($a_attr)
    {
        if (is_object($this->tab_node)) {
            return  $this->tab_node->get_attribute($a_attr);
        }
    }

    public static function getLangVars()
    {
        return array("ed_insert_dtable", "ed_insert_atable","ed_new_row_after", "ed_new_row_before",
            "ed_new_col_after", "ed_new_col_before", "ed_delete_col",
            "ed_delete_row", "ed_edit_data", "ed_row_up", "ed_row_down",
            "ed_col_left", "ed_col_right");
    }


    public static function handleCopiedContent(DOMDocument $a_domdoc, $a_self_ass = true, $a_clone_mobs = false)
    {
        $xpath = new DOMXPath($a_domdoc);
        $nodes = $xpath->query("//Table");
        foreach ($nodes as $node) {
            $node->removeAttribute("Id");
        }
    }
}