assessment/classes/class.ilImagemapPreview.php

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<?php
 /*
   +----------------------------------------------------------------------------+
   | ILIAS open source                                                          |
   +----------------------------------------------------------------------------+
   | Copyright (c) 1998-2001 ILIAS open source, University of Cologne           |
   |                                                                            |
   | This program is free software; you can redistribute it and/or              |
   | modify it under the terms of the GNU General Public License                |
   | as published by the Free Software Foundation; either version 2             |
   | of the License, or (at your option) any later version.                     |
   |                                                                            |
   | This program is distributed in the hope that it will be useful,            |
   | but WITHOUT ANY WARRANTY; without even the implied warranty of             |
   | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              |
   | GNU General Public License for more details.                               |
   |                                                                            |
   | You should have received a copy of the GNU General Public License          |
   | along with this program; if not, write to the Free Software                |
   | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
   +----------------------------------------------------------------------------+
*/

include_once "./assessment/classes/inc.AssessmentConstants.php";
class ilImagemapPreview
{
        var $imagemap_filename;
        var $preview_filename;
        var $areas;
        var $linewidth_outer;
        var $linewidth_inner;

        function ilImagemapPreview($imagemap_filename = "")
        {
                $this->imagemap_filename = $imagemap_filename;
                $this->preview_filename = $preview_filename;
                if (!@is_file($this->preview_filename))
                {
                        $extension = ".jpg";
                        if (preg_match("/.*\.(png|jpg|gif|jpeg)$/", $this->imagemap_filename, $matches))
                        {
                                $extension = "." . $matches[1];
                        }
                        include_once "./classes/class.ilUtil.php";
                        $this->preview_filename = ilUtil::ilTempnam() . $extension;
                }
                $this->areas = array();
                $this->linewidth_outer = 4;
                $this->linewidth_inner = 2;
        }

        function getAreaCount()
        {
                return count($this->areas);
        }

        function addArea(
                $index,
                $shape,
                $coords,
                $title = "",
                $href = "",
                $target = "",
                $visible = true,
                $linecolor = "red",
                $bordercolor = "white",
                $fillcolor = "\"#FFFFFFA0\""
        )
        {
                if (ini_get("safe_mode"))
                {
                        if ((strpos($fillcolor, "#") !== false) || (strpos($fillcolor, "rgb") !== false))
                        {
                                $fillcolor = str_replace("\"", "", $fillcolor);
                        }
                }
                $this->areas[$index] = array(
                        "shape" => "$shape",
                        "coords" => "$coords",
                        "title" => "$title",
                        "href" => "$href",
                        "target" => "$target",
                        "linecolor" => "$linecolor",
                        "fillcolor" => "$fillcolor",
                        "bordercolor" => "$bordercolor",
                        "visible" => (int)$visible
                );
        }
        
        function getAreaIdent()
        {
                if (count($this->areas) > 0)
                {
                        $arr = array_keys($this->areas);
                        sort($arr, SORT_NUMERIC);
                        return "preview_" . join("_", $arr) . "_";
                }
                else
                {
                        return "";
                }
        }

        function createPreview()
        {
                if (!count($this->areas)) return;
                include_once "./classes/class.ilUtil.php";
                $convert_prefix = ilUtil::getConvertCmd() . " -quality 100 ";
                foreach ($this->areas as $area)
                {
                        if ($area["visible"] and strcmp(strtolower($area["shape"]), "rect") == 0)
                        {
                                preg_match("/(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)/", $area["coords"], $matches);
                                $x0 = $matches[1];
                                $y0 = $matches[2];
                                $x1 = $matches[3];
                                $y1 = $matches[4];
                                // draw a rect around the selection
                                $convert_cmd .= "-stroke " . $area["bordercolor"] . " -fill " . $area["fillcolor"] . " -strokewidth $this->linewidth_outer -draw \"rectangle " .
                                $x0 . "," . $y0 .       " " . ($x1) . "," . $y1 . "\" " .
                                "-stroke " . $area["linecolor"] . " -fill " . $area["fillcolor"] . " -strokewidth $this->linewidth_inner -draw \"rectangle " .
                                $x0 . "," . $y0 .       " " . ($x1) . "," . $y1 . "\" ";
                        }
                        else if ($area["visible"] and strcmp(strtolower($area["shape"]), "circle") == 0)
                        {
                                preg_match("/(\d+)\s*,\s*(\d+)\s*,\s*(\d+)/", $area["coords"], $matches);
                                $x = $matches[1];
                                $y = $matches[2];
                                $r = $matches[3];
                                // draw a circle around the selection
                                $convert_cmd .= "-stroke " . $area["bordercolor"] . " -fill " . $area["fillcolor"] . " -strokewidth $this->linewidth_outer -draw \"circle " .
                                $x . "," . $y . " " . ($x+$r) . "," . $y . "\" " .
                                "-stroke " . $area["linecolor"] . " -fill " . $area["fillcolor"] . " -strokewidth $this->linewidth_inner -draw \"circle " .
                                $x . "," . $y . " " . ($x+$r) . "," . $y . "\" ";
                        }
                        else if ($area["visible"] and strcmp(strtolower($area["shape"]), "poly") == 0)
                        {
                                // draw a polygon around the selection
                                $convert_cmd .= "-stroke " . $area["bordercolor"] . " -fill " . $area["fillcolor"] . " -strokewidth $this->linewidth_outer -draw \"polygon ";
                                preg_match_all("/(\d+)\s*,\s*(\d+)/", $area["coords"], $matches, PREG_PATTERN_ORDER);
                                for ($i = 0; $i < count($matches[0]); $i++)
                                {
                                        $convert_cmd .= $matches[1][$i] . "," . $matches[2][$i] .       " ";
                                }
                                $convert_cmd .= "\" ";
                                $convert_cmd .= "-stroke " . $area["linecolor"] . " -fill " . $area["fillcolor"] . " -strokewidth $this->linewidth_inner -draw \"polygon ";
                                preg_match_all("/(\d+)\s*,\s*(\d+)/", $area["coords"], $matches, PREG_PATTERN_ORDER);
                                for ($i = 0; $i < count($matches[0]); $i++)
                                {
                                        $convert_cmd .= $matches[1][$i] . "," . $matches[2][$i] .       " ";
                                }
                                $convert_cmd .= "\" ";
                        }
                }
                $convert_cmd = $convert_prefix . $convert_cmd .  escapeshellcmd(str_replace(" ", "\ ", $this->imagemap_filename)) ." " . escapeshellcmd($this->preview_filename);
                system($convert_cmd);
        }

        function getPreviewFilename($imagePath, $baseFileName)
        {
                $filename = $baseFileName;
                if (count($this->areas))
                {
                        $pfile = $this->preview_filename;
                        if (is_file($pfile))
                        {
                                $ident = $this->getAreaIdent();
                                $previewfile = $imagePath . $ident . $baseFileName;
                                if (@md5_file($previewfile) != @md5_file($pfile))
                                {
                                        if (strlen($ident) > 0)
                                        {
                                                @copy($pfile, $previewfile);
                                        }
                                }
                                @unlink($pfile);
                                if (strlen($pfile) == 0)
                                {
                                        ilUtil::sendInfo($this->lng->txt("qpl_imagemap_preview_missing"));
                                }
                                else
                                {
                                        $filename = basename($previewfile);
                                }
                        }
                        else
                        {
                                ilUtil::sendInfo($this->lng->txt("qpl_imagemap_preview_missing"));
                        }
                }
                return $filename;
        }

        function getImagemap($title)
        {
                $map = "<map name=\"$title\"> ";
                foreach ($this->areas as $area)
                {
                        $map .= "<area alt=\"" . $area["title"] . "\"  title=\"" . $area["title"] . "\" ";
                        $map .= "shape=\"" . $area["shape"] . "\" ";
                        $map .= "coords=\"" .  $area["coords"] . "\" ";
                        if ($area["href"])
                        {
                                $map .= "href=\"" . $area["href"] . "\" ";
                                if ($area["target"])
                                {
                                        $map .= "target=\"" . $area["target"] . "\" ";
                                }
                                $map .= "/>\n";
                        }
                        else
                        {
                                $map .= "nohref />\n";
                        }
                }
                $map .= "</map>";
                return $map;
        }

}
?>