restrict activities performed in a nested context

www/common/common-ui-elements.js

@@ -523,6 +523,16 @@ define([
         UI.openCustomModal(modal);
     };
 
+    Messages.ui_openDirectly = "This functionality is not available when CryptPad is embedded in another site.  Open this pad in its own window?";// XXX
+    UIElements.openDirectlyConfirmation = function (common, cb) {
+        cb = cb || Util.noop;
+        UI.confirm(h('p', Messages.ui_openDirectly), yes => {
+            if (!yes) { return void cb(yes); }
+            common.openDirectly();
+            cb(yes);
+        });
+    };
+
     UIElements.createButton = function (common, type, rightside, data, callback) {
         var AppConfig = common.getAppConfig();
         var button;

www/common/sframe-app-framework.js

@@ -734,6 +734,10 @@ define([
         var createFilePicker = function () {
             if (!common.isLoggedIn()) { return; }
             $embedButton = common.createButton('mediatag', true).click(function () {
+                if (!cpNfInner.metadataMgr.getPrivateData().isTop) {
+                    return void UIElements.openDirectlyConfirmation(common);
+                }
+
                 var cfg = {
                     types: ['file', 'link'],
                     where: ['root']

www/common/sframe-common-outer.js

@@ -641,6 +641,7 @@ define([
                         prefersDriveRedirect: Utils.LocalStore.getDriveRedirectPreference(),
                         isPresent: parsed.hashData && parsed.hashData.present,
                         isEmbed: parsed.hashData && parsed.hashData.embed,
+                        isTop: window.top === window,
                         canEdit: hashes && hashes.editHash,
                         oldVersionHash: parsed.hashData && parsed.hashData.version < 2, // password
                         isHistoryVersion: parsed.hashData && parsed.hashData.versionHash,
@@ -838,14 +839,19 @@ define([
                     }
                 });
 
-                sframeChan.on('EV_OPEN_URL', function (url) {
-                    if (url) {
-                        var a = window.open(url);
-                        if (!a) {
-                            sframeChan.event('EV_POPUP_BLOCKED');
-                        }
+                var openURL = function (url) {
+                    if (!url) { return; }
+                    var a = window.open(url);
+                    if (!a) {
+                        sframeChan.event('EV_POPUP_BLOCKED');
                     }
+                };
+
+                sframeChan.on('EV_OPEN_URL_DIRECTLY', function () {
+                    var url = currentPad.href;
+                    openURL(url);
                 });
+                sframeChan.on('EV_OPEN_URL', openURL);
 
                 sframeChan.on('EV_OPEN_UNSAFE_URL', function (url) {
                     if (url) {

www/common/sframe-common.js

@@ -662,6 +662,9 @@ define([
         });
     };
 
+    funcs.openDirectly = function () {
+        ctx.sframeChan.event('EV_OPEN_URL_DIRECTLY');
+    };
     funcs.gotoURL = function (url) { ctx.sframeChan.event('EV_GOTO_URL', url); };
     funcs.openURL = function (url) { ctx.sframeChan.event('EV_OPEN_URL', url); };
     funcs.getBounceURL = function (url) {

www/common/toolbar.js

@@ -582,6 +582,9 @@ MessengerUI, Messages, Pages) {
             hidden: true
         });
         $shareBlock.click(function () {
+            if (!config.metadataMgr.getPrivateData().isTop) {
+                return void UIElements.openDirectlyConfirmation(Common);
+            }
             if (toolbar.isDeleted) {
                 return void UI.warn(Messages.deletedFromServer);
             }
@@ -609,7 +612,10 @@ MessengerUI, Messages, Pages) {
             h('i.fa.fa-unlock-alt'),
             h('span.cp-button-name', Messages.accessButton)
         ]));
-        $accessBlock.click(function () { 
+        $accessBlock.click(function () {
+            if (!config.metadataMgr.getPrivateData().isTop) {
+                return void UIElements.openDirectlyConfirmation(Common);
+            }
             if (toolbar.isDeleted) {
                 return void UI.warn(Messages.deletedFromServer);
             }