resource.class.php

很棒的在线教学系统

        /// Set up some variables

        $inpopup = optional_param('inpopup', 0, PARAM_BOOL);

        if (resource_is_url($resource->reference)) {
            $fullurl = $resource->reference;
            if (!empty($querystring)) {
                $urlpieces = parse_url($resource->reference);
                if (empty($urlpieces['query']) or $isteamspeak) {
                    $fullurl .= '?'.$querystring;
                } else {
                    $fullurl .= '&'.$querystring;
                }
            }

        } else if ($CFG->resource_allowlocalfiles and (strpos($resource->reference, RESOURCE_LOCALPATH) === 0)) {  // Localpath
            $localpath = get_user_preferences('resource_localpath', 'D:');
            $relativeurl = str_replace(RESOURCE_LOCALPATH, $localpath, $resource->reference);

            if ($querystring) {
                $relativeurl .= '?'.$querystring;
            }

            $relativeurl = str_replace('\\', '/', $relativeurl);
            $relativeurl = str_replace(' ', '%20', $relativeurl);
            $fullurl = 'file:///'.htmlentities($relativeurl);
            $localpath = true;

        } else {   // Normal uploaded file
            $forcedownloadsep = '?';
            if ($resource->options == 'forcedownload') {
                $querys['forcedownload'] = '1';
            }
            $fullurl = get_file_url($course->id.'/'.$resource->reference, $querys);
        }

        /// Print a notice and redirect if we are trying to access a file on a local file system
        /// and the config setting has been disabled
        if (!$CFG->resource_allowlocalfiles and (strpos($resource->reference, RESOURCE_LOCALPATH) === 0)) {
            if ($inpopup) {
                print_header($pagetitle, $course->fullname);
            } else {
                $navigation = build_navigation($this->navlinks, $cm);
                print_header($pagetitle, $course->fullname, $navigation,
                        "", "", true, update_module_button($cm->id, $course->id, $this->strresource), navmenu($course, $cm));
            }
            notify(get_string('notallowedlocalfileaccess', 'resource', ''));
            if ($inpopup) {
                close_window_button();
            }
            print_footer('none');
            die;
        }


        /// Check whether this is supposed to be a popup, but was called directly
        if ($resource->popup and !$inpopup) {    /// Make a page and a pop-up window
            $navigation = build_navigation($this->navlinks, $cm);
            print_header($pagetitle, $course->fullname, $navigation,
                    "", "", true, update_module_button($cm->id, $course->id, $this->strresource), navmenu($course, $cm));

            echo "\n<script type=\"text/javascript\">";
            echo "\n<!--\n";
            echo "openpopup('/mod/resource/view.php?inpopup=true&id={$cm->id}','resource{$resource->id}','{$resource->popup}');\n";
            echo "\n-->\n";
            echo '</script>';

            if (trim(strip_tags($resource->summary))) {
                print_simple_box(format_text($resource->summary, FORMAT_MOODLE, $formatoptions), "center");
            }

            $link = "<a href=\"$CFG->wwwroot/mod/resource/view.php?inpopup=true&amp;id={$cm->id}\" "
                  . "onclick=\"this.target='resource{$resource->id}'; return openpopup('/mod/resource/view.php?inpopup=true&amp;id={$cm->id}', "
                  . "'resource{$resource->id}','{$resource->popup}');\">".format_string($resource->name,true)."</a>";

            echo '<div class="popupnotice">';
            print_string('popupresource', 'resource');
            echo '<br />';
            print_string('popupresourcelink', 'resource', $link);
            echo '</div>';
            print_footer($course);
            exit;
        }


        /// Now check whether we need to display a frameset

        $frameset = optional_param('frameset', '', PARAM_ALPHA);
        if (empty($frameset) and !$embedded and !$inpopup and ($resource->options == "frame" || $resource->options == "objectframe") and empty($USER->screenreader)) {
        /// display the resource into a object tag
            if ($resource->options == "objectframe") {
            /// Yahoo javascript libaries for updating embedded object size
                require_js(array('yui_utilities'));
                require_js(array('yui_container'));
                require_js(array('yui_dom-event'));
                require_js(array('yui_dom'));


            /// Moodle Header and navigation bar
                $navigation = build_navigation($this->navlinks, $cm);
                print_header($pagetitle, $course->fullname, $navigation, "", "", true, update_module_button($cm->id, $course->id, $this->strresource), navmenu($course, $cm, "parent"));
                $options = new object();
                $options->para = false;
                if (!empty($localpath)) {  // Show some help
                    echo '<div class="mdl-right helplink">';
                    link_to_popup_window ('/mod/resource/type/file/localpath.php', get_string('localfile', 'resource'), get_string('localfilehelp','resource'), 400, 500, get_string('localfilehelp', 'resource'));
                    echo '</div>';
                }
                echo '</div></div>';

            /// embedded file into iframe if the resource is on another domain
            ///
            /// This case is not XHTML strict but there is no alternative
            /// The object tag alternative is XHTML strict, however IE6-7 displays a blank object on accross domain by default,
            /// so we decided to use iframe for accross domain MDL-10021
                if (!stristr($fullurl,$CFG->wwwroot)) {
                    echo '<p><iframe id="embeddedhtml" src ="'.$fullurl.'" width="100%" height="600"></iframe></p>';
                }
                else {
                /// embedded HTML file into an object tag
                    echo '<p><object id="embeddedhtml" data="' . $fullurl . '" type="'.$mimetype.'" width="800" height="600">
                            alt : <a href="' . $fullurl . '">' . $fullurl . '</a>
                          </object></p>';
                }
            /// add some javascript in order to fit this object tag into the browser window
                echo '<script type="text/javascript">
                             //<![CDATA[
                             function resizeEmbeddedHtml() {
                             //calculate new embedded html height size
                     ';
                if (!empty($resource->summary)) {
                    echo'    objectheight =  YAHOO.util.Dom.getViewportHeight() - 230;
                        ';
                }
                else {
                     echo'    objectheight =  YAHOO.util.Dom.getViewportHeight() - 120;
                         ';
                }
                echo '       //the object tag cannot be smaller than a human readable size
                             if (objectheight < 200) {
                                 objectheight = 200;
                             }
                             //resize the embedded html object
                             YAHOO.util.Dom.setStyle("embeddedhtml", "height", objectheight+"px");
                             YAHOO.util.Dom.setStyle("embeddedhtml", "width", "100%");
                          }
                          resizeEmbeddedHtml();
                          YAHOO.widget.Overlay.windowResizeEvent.subscribe(resizeEmbeddedHtml);
                          //]]>
                       </script>
                    ';

            /// print the summary
                if (!empty($resource->summary)) {
                    print_simple_box(format_text($resource->summary, FORMAT_MOODLE, $formatoptions, $course->id), "center");
                }
                echo "</body></html>";
                exit;
            }
            /// display the resource into a frame tag
            else {
                @header('Content-Type: text/html; charset=utf-8');
                echo "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Frameset//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd\">\n";
                echo "<html dir=\"ltr\">\n";
                echo '<head>';
                echo '<meta http-equiv="content-type" content="text/html; charset=utf-8" />';
                echo "<title>" . format_string($course->shortname) . ": ".strip_tags(format_string($resource->name,true))."</title></head>\n";
                echo "<frameset rows=\"$CFG->resource_framesize,*\">";
                echo "<frame src=\"view.php?id={$cm->id}&amp;type={$resource->type}&amp;frameset=top\" title=\"".get_string('modulename','resource')."\"/>";
                if (!empty($localpath)) {  // Show it like this so we interpose some HTML
                    echo "<frame src=\"view.php?id={$cm->id}&amp;type={$resource->type}&amp;inpopup=true\" title=\"".get_string('modulename','resource')."\"/>";
                } else {
                    echo "<frame src=\"$fullurl\" title=\"".get_string('modulename','resource')."\"/>";
                }
                echo "</frameset>";
                echo "</html>";
                exit;
            }
        }


        /// We can only get here once per resource, so add an entry to the log

        add_to_log($course->id, "resource", "view", "view.php?id={$cm->id}", $resource->id, $cm->id);


        /// If we are in a frameset, just print the top of it

        if (!empty( $frameset ) and ($frameset == "top") ) {
            $navigation = build_navigation($this->navlinks, $cm);
            print_header($pagetitle, $course->fullname, $navigation,
                    "", "", true, update_module_button($cm->id, $course->id, $this->strresource), navmenu($course, $cm, "parent"));

            $options = new object();
            $options->para = false;
            echo '<div class="summary">'.format_text($resource->summary, FORMAT_HTML, $options).'</div>';
            if (!empty($localpath)) {  // Show some help
                echo '<div class="mdl-right helplink">';
                link_to_popup_window ('/mod/resource/type/file/localpath.php', get_string('localfile', 'resource'),
                        get_string('localfilehelp','resource'), 400, 500, get_string('localfilehelp', 'resource'));
                echo '</div>';
            }
            print_footer('empty');
            exit;
        }


        /// Display the actual resource
        if ($embedded) {       // Display resource embedded in page
            $strdirectlink = get_string("directlink", "resource");

            if ($inpopup) {
                print_header($pagetitle);
            } else {
                $navigation = build_navigation($this->navlinks, $cm);
                print_header_simple($pagetitle, '', $navigation, "", "", true,
                    update_module_button($cm->id, $course->id, $this->strresource), navmenu($course, $cm, "self"));

            }

            if ($resourcetype == "image") {
                echo '<div class="resourcecontent resourceimg">';
                echo "<img title=\"".strip_tags(format_string($resource->name,true))."\" class=\"resourceimage\" src=\"$fullurl\" alt=\"\" />";
                echo '</div>';

            } else if ($resourcetype == "mp3") {
                if (!empty($THEME->resource_mp3player_colors)) {
                    $c = $THEME->resource_mp3player_colors;   // You can set this up in your theme/xxx/config.php
                } else {
                    $c = 'bgColour=000000&btnColour=ffffff&btnBorderColour=cccccc&iconColour=000000&'.
                         'iconOverColour=00cc00&trackColour=cccccc&handleColour=ffffff&loaderColour=ffffff&'.
                         'font=Arial&fontColour=FF33FF&buffer=10&waitForPlay=no&autoPlay=yes';
                }
                $c .= '&volText='.get_string('vol', 'resource').'&panText='.get_string('pan','resource');
                $c = htmlentities($c);
                $id = 'filter_mp3_'.time(); //we need something unique because it might be stored in text cache
                $cleanurl = addslashes_js($fullurl);


                // If we have Javascript, use UFO to embed the MP3 player, otherwise depend on plugins

                echo '<div class="resourcecontent resourcemp3">';

                echo '<span class="mediaplugin mediaplugin_mp3" id="'.$id.'"></span>'.
                     '<script type="text/javascript">'."\n".
                     '//<![CDATA['."\n".
                       'var FO = { movie:"'.$CFG->wwwroot.'/lib/mp3player/mp3player.swf?src='.$cleanurl.'",'."\n".
                         'width:"600", height:"70", majorversion:"6", build:"40", flashvars:"'.$c.'", quality: "high" };'."\n".
                       'UFO.create(FO, "'.$id.'");'."\n".
                     '//]]>'."\n".
                     '</script>'."\n";

                echo '<noscript>';

                echo "<object type=\"audio/mpeg\" data=\"$fullurl\" width=\"600\" height=\"70\">";
                echo "<param name=\"src\" value=\"$fullurl\" />";
                echo '<param name="quality" value="high" />';
                echo '<param name="autoplay" value="true" />';
                echo '<param name="autostart" value="true" />';
                echo '</object>';
                echo '<p><a href="' . $fullurl . '">' . $fullurl . '</a></p>';

                echo '</noscript>';
                echo '</div>';

            } else if ($resourcetype == "flv") {
                $id = 'filter_flv_'.time(); //we need something unique because it might be stored in text cache
                $cleanurl = addslashes_js($fullurl);


                // If we have Javascript, use UFO to embed the FLV player, otherwise depend on plugins

                echo '<div class="resourcecontent resourceflv">';

                echo '<span class="mediaplugin mediaplugin_flv" id="'.$id.'"></span>'.
                     '<script type="text/javascript">'."\n".
                     '//<![CDATA['."\n".
                       'var FO = { movie:"'.$CFG->wwwroot.'/filter/mediaplugin/flvplayer.swf?file='.$cleanurl.'",'."\n".
                         'width:"600", height:"400", majorversion:"6", build:"40", allowscriptaccess:"never", allowfullscreen:"true", quality: "high" };'."\n".
                       'UFO.create(FO, "'.$id.'");'."\n".
                     '//]]>'."\n".
                     '</script>'."\n";

                echo '<noscript>';

                echo "<object type=\"video/x-flv\" data=\"$fullurl\" width=\"600\" height=\"400\">";
                echo "<param name=\"src\" value=\"$fullurl\" />";
                echo '<param name="quality" value="high" />';
                echo '<param name="autoplay" value="true" />';
                echo '<param name="autostart" value="true" />';
                echo '</object>';
                echo '<p><a href="' . $fullurl . '">' . $fullurl . '</a></p>';

                echo '</noscript>';