Block snapshot creation while disconnected

customize.dist/src/less2/include/modals-ui-elements.less

@@ -125,8 +125,11 @@
         margin-bottom: @snapshot_spacing;
         max-height: 245px;
         overflow: auto;
-        min-height: 100px;
         outline: none;
+        .cp-snapshot-spinner {
+            min-height: 90px;
+            text-align: center;
+        }
         .cp-snapshot-element {
             display: flex;
             align-items: center;

customize.dist/src/less2/include/toolbar-history.less

@@ -197,6 +197,7 @@
                     right: 1px;
                     top: 1px;
                     bottom: 1px;
+                    cursor: pointer;
                     .cp-history-snapshot {
                         position: absolute;
                         border: 2px solid @cryptpad_text_col;

www/common/common-ui-elements.js

@@ -3314,6 +3314,7 @@ define([
     Messages.snapshots_placeholder = "Snapshot title"; // XXX
     Messages.snapshots_open = "View";
     Messages.snapshots_delete = "Delete";
+    Messages.snapshots_cantMake = "Disconnected. Can't create a new snapshot now.";
     UIElements.openSnapshotsModal = function (common, load, make, remove) {
         var modal;
         var readOnly = common.getMetadataMgr().getPrivateData().readOnly;
@@ -3406,10 +3407,15 @@ define([
                 onClick: function () {
                     var val = $input.val();
                     if (!val) { return true; }
-                    $container.html('');
+                    $container.html('').append(h('div.cp-snapshot-spinner'));
-                    UI.spinner($container).get().show();
+                    var to = setTimeout(function () {
+                        UI.spinner($container.find('div')).get().show();
+                    });
                     make(val, function (err) {
-                        if (err) { return; }
+                        clearTimeout(to);
+                        if (err) {
+                            return void UI.alert(Messages.snapshots_cantMake);
+                        }
                         refresh();
                     });
                     return true;

www/common/sframe-app-framework.js

@@ -138,6 +138,9 @@ define([
             onLocal();
         };
         var makeSnapshot = function (title, cb) {
+            if (state !== STATE.READY) {
+                return void cb('NOT_READY');
+            }
             var sframeChan = common.getSframeChannel();
             sframeChan.query("Q_GET_LAST_HASH", null, function (err, obj) {
                 if (err || (obj && obj.error)) { return void UI.warn(Messages.error); }
@@ -357,6 +360,7 @@ define([
         };
         var setLastMetadata = function (md) {
             if (!unsyncMode) { return; }
+            if (state !== STATE.READY) { return; }
             var newContentStr = cpNfInner.chainpad.getAuthDoc();
             var newContent = JSON.parse(newContentStr);
             if (Array.isArray(newContent)) {

www/common/sframe-common-history.js

@@ -396,7 +396,7 @@ define([
                     time: block.time ? (+new Date(block.time)) : +new Date()
                 };
                 var sent = config.setLastMetadata(md);
-                if (!sent) { return void UI.warn(Messages.error); }
+                if (!sent) { return void UI.alert(Messages.snapshots_cantMake); }
                 refreshBar();
             } catch (e) {
                 console.error(e);