class.ilImagemapPreview.php

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<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once "./Modules/Test/classes/inc.AssessmentConstants.php";

class ilImagemapPreview
{
        var $imagemap_filename;
        var $preview_filename;
        var $areas;
        var $points;
        var $linewidth_outer;
        var $linewidth_inner;
        var $lng;

        function ilImagemapPreview($imagemap_filename = "")
        {
                global $lng;
                $this->lng =& $lng;
                $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 "./Services/Utilities/classes/class.ilUtil.php";
                        $this->preview_filename = ilUtil::ilTempnam() . $extension;
                }
                $this->areas = array();
                $this->points = array();
                $this->linewidth_outer = 4;
                $this->linewidth_inner = 2;
        }
        
        function getAreaCount()
        {
                return count($this->areas);
        }
        
        function getPointCount()
        {
                return count($this->points);
        }

        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 addPoint(
                $index,
                $coords,
                $visible = true,
                $linecolor = "red",
                $bordercolor = "white",
                $fillcolor = "#FFFFFFA0"
        )
        {
                $this->points[$index] = array(
                        "coords" => "$coords",
                        "linecolor" => '"' . $linecolor . '"',
                        "fillcolor" => '"' . $fillcolor . '"',
                        "bordercolor" => '"' . $bordercolor . '"',
                        "visible" => (int)$visible
                );
        }
        
        function getAreaIdent()
        {
                if (count($this->areas)+count($this->points) > 0)
                {
                        $arr = array_merge(array_keys($this->areas), array_keys($this->points));
                        sort($arr, SORT_NUMERIC);
                        
                        $inner = join("_", $arr);
                        if (strlen($inner) > 32) {
                                $inner = md5($inner);
                        }
                        return "preview_" . $inner . "_";
                }
                else
                {
                        return "";
                }
        }

        function createPreview()
        {
                if (count($this->areas)+count($this->points)==0) return;
                include_once "./Services/Utilities/classes/class.ilUtil.php";
                $convert_cmd = "-quality 100 ";
                foreach ($this->points as $point)
                {
                        if ($point["visible"])
                        {
                                preg_match("/(\d+)\s*,\s*(\d+)/", $point["coords"], $matches);
                                $x = $matches[1];
                                $y = $matches[2];
                                $r = 6;
                                // draw a circle at the point
                                $convert_cmd .= "-stroke " . $point["bordercolor"] . " -fill " . $point["fillcolor"] . " -strokewidth $this->linewidth_outer -draw \"line " .
                                ($x-$r) . "," . ($y-$r) .       " " . ($x+$r) . "," . ($y+$r) . "\" " .
                                "-stroke " . $point["bordercolor"] . " -fill " . $point["fillcolor"] . " -strokewidth $this->linewidth_outer -draw \"line " .
                                ($x+$r) . "," . ($y-$r) .       " " . ($x-$r) . "," . ($y+$r) . "\" " .
                                "-stroke " . $point["linecolor"] . " -fill " . $point["fillcolor"] . " -strokewidth $this->linewidth_inner -draw \"line " .
                                ($x-$r) . "," . ($y-$r) .       " " . ($x+$r) . "," . ($y+$r) . "\" " .
                                "-stroke " . $point["linecolor"] . " -fill " . $point["fillcolor"] . " -strokewidth $this->linewidth_inner -draw \"line " .
                                ($x+$r) . "," . ($y-$r) .       " " . ($x-$r) . "," . ($y+$r) . "\" ";
                        }
                }
                foreach ($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)
                        {
                                $obj = "polygon";
                                // draw a polygon around the selection
                                preg_match_all("/(\d+)\s*,\s*(\d+)/", $area["coords"], $matches, PREG_PATTERN_ORDER);
                                if (count($matches[0]) == 2) $obj = "line";
                                $convert_cmd .= "-stroke " . $area["bordercolor"] . " -fill " . $area["fillcolor"] . " -strokewidth $this->linewidth_outer -draw \"$obj ";
                                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 $this->linewidth_inner -draw \"$obj ";
                                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 .= "\" ";
                        }
                }
                
                $source = ilUtil::escapeShellCmd($this->imagemap_filename);
                $target = ilUtil::escapeShellCmd($this->preview_filename);
                $convert_cmd = $source . "[0] " . $convert_cmd." ".$target;
                ilUtil::execConvert($convert_cmd);
        }

        function getPreviewFilename($imagePath, $baseFileName)
        {
                $filename = $baseFileName;
                if (count($this->areas)+count($this->points)>0)
                {
                        $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;
        }

}
?>