show "browser" source option in project dialog when (deprecated) locally stored projects still exist

HISTORY.md

@@ -6,11 +6,15 @@
     * gliding animation when inserting  blocks using the keyboard
     * optimized collision detection
 * **Notable Fixes:**
+    * show "browser" source option in project dialog when (deprecated) locally stored projects still exist
     * list watchers occasionally didn't show cells after reassigning a changed list to a variable
     * FOREACH over a linked list failed for scripts mutating it
     * eliminated an occasional empty label line when variadic inputs wrap as a whole, thanks, Mary, for reporting this bug!
 * **Translation Updates:**
 
+### 2019-07-04
+* gui: show "browser" source option in project dialog when (deprecated) locally stored projects still exist
+
 ### 2019-07-03
 * blocks: eliminated an occasional empty label line when variadic inputs wrap as a whole, thanks, Mary, for reporting this bug!
 

snap.html

@@ -9,7 +9,7 @@
         <script type="text/javascript" src="src/blocks.js?version=2019-07-03"></script>
         <script type="text/javascript" src="src/threads.js?version=2019-07-01"></script>
         <script type="text/javascript" src="src/objects.js?version=2019-06-27"></script>
-        <script type="text/javascript" src="src/gui.js?version=2019-07-01"></script>
+        <script type="text/javascript" src="src/gui.js?version=2019-07-04"></script>
         <script type="text/javascript" src="src/paint.js?version=2019-06-27"></script>
         <script type="text/javascript" src="src/lists.js?version=2019-07-01"></script>
         <script type="text/javascript" src="src/byob.js?version=2019-06-27"></script>

src/gui.js

@@ -75,7 +75,7 @@ isRetinaSupported, SliderMorph, Animation, BoxMorph, MediaRecorder*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2019-July-01';
+modules.gui = '2019-July-04';
 
 // Declarations
 
@@ -6078,7 +6078,8 @@ ProjectDialogMorph.prototype.buildContents = function () {
     if (this.task === 'open') {
         this.buildFilterField();
         this.addSourceButton('examples', localize('Examples'), 'poster');
-        if (this.ide.world().currentKey === 16) { // shiftClicked
+        if (this.hasLocalProjects() || this.ide.world().currentKey === 16) {
+            // shift- clicked
             this.addSourceButton('local', localize('Browser'), 'globe');
         }
     }
@@ -6556,6 +6557,15 @@ ProjectDialogMorph.prototype.setSource = function (source) {
     }
 };
 
+ProjectDialogMorph.prototype.hasLocalProjects = function () {
+    // check and report whether old projects still exist in the
+    // browser's local storage, which as of v5 has been deprecated,
+    // so the user can recover and move them elsewhere
+    return Object.keys(localStorage).some(function (any) {
+        return any.indexOf('-snap-project-') === 0;
+    });
+};
+
 ProjectDialogMorph.prototype.getLocalProjectList = function () {
     var stored, name, dta,
         projects = [];