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Filename : TableCell.php
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<?php
/**
 * @package dompdf
 * @link    http://dompdf.github.com/
 * @author  Benj Carson <benjcarson@digitaljunkies.ca>
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 */
namespace Dompdf\Renderer;

use Dompdf\Frame;
use Dompdf\FrameDecorator\Table;

/**
 * Renders table cells
 *
 * @package dompdf
 */
class TableCell extends Block
{

    //........................................................................

    function render(Frame $frame)
    {
        $style = $frame->get_style();

        if (trim($frame->get_node()->nodeValue) === "" && $style->empty_cells === "hide") {
            return;
        }

        $this->_set_opacity($frame->get_opacity($style->opacity));
        list($x, $y, $w, $h) = $frame->get_border_box();

        // Draw our background, border and content
        if (($bg = $style->background_color) !== "transparent") {
            $this->_canvas->filled_rectangle($x, $y, $w, $h, $bg);
        }

        if (($url = $style->background_image) && $url !== "none") {
            $this->_background_image($url, $x, $y, $w, $h, $style);
        }

        $table = Table::find_parent_table($frame);

        if ($table->get_style()->border_collapse !== "collapse") {
            $this->_render_border($frame);
            $this->_render_outline($frame);
            return;
        }

        // The collapsed case is slightly complicated...
        // @todo Add support for outlines here

        $cellmap = $table->get_cellmap();
        $cells = $cellmap->get_spanned_cells($frame);
        $num_rows = $cellmap->get_num_rows();
        $num_cols = $cellmap->get_num_cols();

        // Determine the top row spanned by this cell
        $i = $cells["rows"][0];
        $top_row = $cellmap->get_row($i);

        // Determine if this cell borders on the bottom of the table.  If so,
        // then we draw its bottom border.  Otherwise the next row down will
        // draw its top border instead.
        if (in_array($num_rows - 1, $cells["rows"])) {
            $draw_bottom = true;
            $bottom_row = $cellmap->get_row($num_rows - 1);
        } else
            $draw_bottom = false;


        // Draw the horizontal borders
        foreach ($cells["columns"] as $j) {
            $bp = $cellmap->get_border_properties($i, $j);

            $y = $top_row["y"] - $bp["top"]["width"] / 2;

            $col = $cellmap->get_column($j);
            $x = $col["x"] - $bp["left"]["width"] / 2;
            $w = $col["used-width"] + ($bp["left"]["width"] + $bp["right"]["width"]) / 2;

            if ($bp["top"]["style"] !== "none" && $bp["top"]["width"] > 0) {
                $widths = array($bp["top"]["width"],
                    $bp["right"]["width"],
                    $bp["bottom"]["width"],
                    $bp["left"]["width"]);
                $method = "_border_" . $bp["top"]["style"];
                $this->$method($x, $y, $w, $bp["top"]["color"], $widths, "top", "square");
            }

            if ($draw_bottom) {
                $bp = $cellmap->get_border_properties($num_rows - 1, $j);
                if ($bp["bottom"]["style"] === "none" || $bp["bottom"]["width"] <= 0)
                    continue;

                $y = $bottom_row["y"] + $bottom_row["height"] + $bp["bottom"]["width"] / 2;

                $widths = array($bp["top"]["width"],
                    $bp["right"]["width"],
                    $bp["bottom"]["width"],
                    $bp["left"]["width"]);
                $method = "_border_" . $bp["bottom"]["style"];
                $this->$method($x, $y, $w, $bp["bottom"]["color"], $widths, "bottom", "square");

            }
        }

        $j = $cells["columns"][0];

        $left_col = $cellmap->get_column($j);

        if (in_array($num_cols - 1, $cells["columns"])) {
            $draw_right = true;
            $right_col = $cellmap->get_column($num_cols - 1);
        } else
            $draw_right = false;

        // Draw the vertical borders
        foreach ($cells["rows"] as $i) {
            $bp = $cellmap->get_border_properties($i, $j);

            $x = $left_col["x"] - $bp["left"]["width"] / 2;

            $row = $cellmap->get_row($i);

            $y = $row["y"] - $bp["top"]["width"] / 2;
            $h = $row["height"] + ($bp["top"]["width"] + $bp["bottom"]["width"]) / 2;

            if ($bp["left"]["style"] !== "none" && $bp["left"]["width"] > 0) {

                $widths = array($bp["top"]["width"],
                    $bp["right"]["width"],
                    $bp["bottom"]["width"],
                    $bp["left"]["width"]);

                $method = "_border_" . $bp["left"]["style"];
                $this->$method($x, $y, $h, $bp["left"]["color"], $widths, "left", "square");
            }

            if ($draw_right) {
                $bp = $cellmap->get_border_properties($i, $num_cols - 1);
                if ($bp["right"]["style"] === "none" || $bp["right"]["width"] <= 0)
                    continue;

                $x = $right_col["x"] + $right_col["used-width"] + $bp["right"]["width"] / 2;

                $widths = array($bp["top"]["width"],
                    $bp["right"]["width"],
                    $bp["bottom"]["width"],
                    $bp["left"]["width"]);

                $method = "_border_" . $bp["right"]["style"];
                $this->$method($x, $y, $h, $bp["right"]["color"], $widths, "right", "square");

            }
        }

    }
}