Added HTML5 embedded audio for results playing on supporting browsers

Restricted to authenticated or localhost users only to prevent
redistribution license issues.

htroot/env/base.css

@@ -1128,6 +1128,16 @@ div#tagcloud {
 
 /******* yacysearchtrailer.html end ***********/
 
+/******* yacysearchitem.html **********/
+
+/* Mark audio element with media playing error */
+.audioError {
+	border-style: solid;
+	border-color: orange;
+}
+
+/******* yacysearchitem.html end ***********/ 
+
 /******* Vocabulary_p.html **********/
 
 #Vocabulary_p label {

htroot/js/yacysearch.js

@@ -284,5 +284,47 @@ function toggleMoreTags(button, moreTagsId) {
 			moreTagsContainer.className = ""; 
 		}
 	}
-	
+}
+
+/**
+ * Handle embedded audio result load error.
+ * 
+ * @param event
+ *            {ErrorEvent} the error event triggered
+ */
+function handleAudioLoadError(event) {
+	if (event != null && event.target != null) {
+		/* Fill the title attribute to provide some feedback about the error without need for looking at the console */
+		if (event.target.error != null && event.target.error.message) {
+			event.target.title = "Cannot play ("
+					+ event.target.error.message + ")";
+		} else {
+			event.target.title = "Cannot play";
+		}
+		
+		/* Apply CSS class marking error for visual feedback*/
+		event.target.className = "audioError";
+	}
+}
+
+/**
+ * Handle embedded audio result 'playing' event : pauses any other currently
+ * playing audio.
+ * 
+ * @param event
+ *            {Event} a 'playing' event
+ */
+function handleAudioPlaying(event) {
+	if (event != null && event.target != null) {
+		var audioElems = document.getElementsByTagName("audio");
+		if(audioElems != null) {
+			for (var i = 0; i < audioElems.length; i++) {
+				var audioElem = audioElems[i];
+				if (audioElem != event.target && audioElem.pause
+						&& !audioElem.paused) {
+					audioElem.pause();
+				}
+			}
+		}
+	}
 }

htroot/yacysearch.html

@@ -199,7 +199,8 @@ document.getElementById("Enter").innerHTML = "search again";
 <div id="datehistogram"></div>
 
 <!-- linklist begin -->
-#(resultTable)#::<table width="100%"><tr class="TableHeader"><td width="30%">Media</td><td width="70%">URL</td></tr>#(/resultTable)#
+#(resultTable)#::<table width="100%"><tr class="TableHeader"><td width="30%">Media</td><td width="70%">URL</td></tr>
+::<table width="100%"><tr class="TableHeader"><td width="30%">Media</td><td width="70%">URL</td>#(embed)#::<td>Player</td>#(/embed)#</tr>#(/resultTable)#
 #(jsResort)#
   #{results}#
   <!--#include virtual="yacysearchitem.html?item=#[item]#&eventID=#[eventID]#" -->
@@ -208,7 +209,7 @@ document.getElementById("Enter").innerHTML = "search again";
   <div id="resultscontainer">
   </div>
 #(/jsResort)#
-#(resultTable)#::</table>#(/resultTable)#
+#(resultTable)#::</table>::</table>#(/resultTable)#
 <!-- linklist end -->
 
 #(num-results)#

htroot/yacysearch.java

@@ -902,7 +902,8 @@ public class yacysearch {
             }
             prop.put("results", theQuery.itemsPerPage());
             prop.put("jsResort_results", theQuery.itemsPerPage());
-            prop.put("resultTable", (contentdom == ContentDomain.APP || contentdom == ContentDomain.AUDIO || contentdom == ContentDomain.VIDEO) ? 1 : 0);
+            prop.put("resultTable", (contentdom == ContentDomain.APP || contentdom == ContentDomain.VIDEO) ? 1 : (contentdom == ContentDomain.AUDIO ? 2 : 0) );
+            prop.put("resultTable_embed", (contentdom == ContentDomain.AUDIO && extendedSearchRights));
             prop.put("eventID", theQuery.id(false)); // for bottomline
             prop.put("jsResort_eventID", theQuery.id(false));
 

htroot/yacysearchitem.html

@@ -61,7 +61,12 @@
     <div class="highslide-caption"><a href="#[href]#" target="#[target]#" #(noreferrer)#::rel="noreferrer"#(/noreferrer)#>#[name]#</a><br /><a href="#[source]#" target="#[target]#" #(noreferrer)#::rel="noreferrer"#(/noreferrer)#>#[sourcedom]#</a></div>
   </div>#(/item)#
   ::
-  #(item)#::<tr class="#(col)#TableCellLight::TableCellDark#(/col)#"><td>#[name]#</td><td><a href="#[href]#" target="#[target]#" #(noreferrer)#::rel="noreferrer"#(/noreferrer)#>#[hrefshort]#</a></tr>#(/item)#
+  #(item)#::
+  <tr class="#(col)#TableCellLight::TableCellDark#(/col)#">
+  	<td>#[name]#</td>
+  	<td><a href="#[href]#" target="#[target]#" #(noreferrer)#::rel="noreferrer"#(/noreferrer)#>#[hrefshort]#</a>
+  	<td class="text-center">#(embed)#::<audio src="#[href]#" preload="none" controls="controls" onplaying="handleAudioPlaying(event)" onerror="handleAudioLoadError(event)">Not supported</audio>#(/embed)#</td>
+  </tr>#(/item)#
   ::
   #(item)#::<tr class="#(col)#TableCellLight::TableCellDark#(/col)#"><td>#[name]#</td><td><a href="#[href]#" target="#[target]#" #(noreferrer)#::rel="noreferrer"#(/noreferrer)#>#[hrefshort]#</a></tr>#(/item)#
   ::

htroot/yacysearchitem.java

@@ -104,6 +104,8 @@ public class yacysearchitem {
         
 		final UserDB.Entry user = sb.userDB != null ? sb.userDB.getUser(header) : null;
 		final boolean authenticated = adminAuthenticated || user != null;
+
+        final boolean extendedSearchRights = adminAuthenticated || (user != null && user.hasRight(UserDB.AccessRight.EXTENDED_SEARCH_RIGHT));
 		
         final int item = post.getInt("item", -1);
         final RequestHeader.FileType fileType = header.fileType();
@@ -450,6 +452,20 @@ public class yacysearchitem {
                 final String resultUrlstring = ms.url().toNormalform(true);
                 final String target = sb.getConfig(resultUrlstring.matches(target_special_pattern) ? SwitchboardConstants.SEARCH_TARGET_SPECIAL : SwitchboardConstants.SEARCH_TARGET_DEFAULT, "_self");
                 prop.putHTML("content_item_href", resultUrlstring);
+                final String mediaType = ms.mime();
+				if (extendedSearchRights && mediaType != null && mediaType.startsWith("audio/")) {
+					/*
+					 * Display HTML5 embedded audio only :
+					 * - when content-type is known to be audio (each browser has its own set of supported audio subtypes, 
+					 *  so the browser will then handle itself eventual report about unsupported media format)
+					 * - to authenticated users with extended search rights to prevent any media redistribution issue
+					 */
+                    prop.put("content_item_embed", true);
+                    prop.putHTML("content_item_embed_href", resultUrlstring);
+                    prop.putHTML("content_item_embed_mediaType", mediaType);	
+                } else {
+                	prop.put("content_item_embed", false);
+                }
                 prop.put("content_item_noreferrer", noreferrer ? 1 : 0);
                 prop.putHTML("content_item_hrefshort", nxTools.shortenURLString(resultUrlstring, MAX_URL_LENGTH));
                 prop.putHTML("content_item_target", target);