Add option to disable mirror view.

static/galene.html

@@ -180,7 +180,12 @@
             <select id="audioselect" class="select select-inline">
               <option value="">off</option>
             </select>
-  
+
+            <form>
+              <input id="mirrorbox" type="checkbox" checked/>
+              <label for="mirrobox">Mirror view</label>
+            </form>
+
             <form>
               <input id="blackboardbox" type="checkbox"/>
               <label for="blackboardbox">Blackboard mode</label>

static/galene.js

@@ -82,6 +82,7 @@ function getUserPass() {
  * @property {string} [request]
  * @property {boolean} [activityDetection]
  * @property {Array.<number>} [resolution]
+ * @property {boolean} [mirrorView]
  * @property {boolean} [blackboardMode]
  * @property {string} [filter]
  */
@@ -234,6 +235,13 @@ function reflectSettings() {
         store = true;
     }
 
+    if(settings.hasOwnProperty('mirrorView')) {
+        getInputElement('mirrorbox').checked = settings.mirrorView;
+    } else {
+        settings.mirrorView = getInputElement('mirrorbox').checked;
+        store = true;
+    }
+
     if(settings.hasOwnProperty('activityDetection')) {
         getInputElement('activitybox').checked = settings.activityDetection;
     } else {
@@ -470,6 +478,14 @@ getSelectElement('audioselect').onchange = function(e) {
     changePresentation();
 };
 
+getInputElement('mirrorbox').onchange = function(e) {
+    e.preventDefault();
+    if(!(this instanceof HTMLInputElement))
+        throw new Error('Unexpected type for this');
+    updateSettings({mirrorView: this.checked});
+    changePresentation();
+};
+
 getInputElement('blackboardbox').onchange = function(e) {
     e.preventDefault();
     if(!(this instanceof HTMLInputElement))
@@ -1095,7 +1111,7 @@ async function addLocalMedia(id) {
 
     c.onstats = gotUpStats;
     c.setStatsInterval(2000);
-    await setMedia(c, true, true);
+    await setMedia(c, true, settings.mirrorView);
     setButtonsVisibility();
 }