keep favourite images #237

schemas/org.gnome.shell.extensions.bingwallpaper.gschema.xml

@@ -69,6 +69,12 @@
         <description>Save disk space</description>
     </key>
 
+    <key name="keep-favourites" type="b">
+      <default>True</default>
+        <summary>Keep previous wallpapers if they are favourites</summary>
+        <description>Sensible default behaivour</description>
+    </key>
+
     <key name="previous-days" type="i">
       <default>8</default>
       <summary>Number of days to keep wallpapers</summary>

utils.js

@@ -550,14 +550,16 @@ export function deleteImage(to_delete) {
 // add image to persistant list so we can delete it later (in chronological order), delete the oldest image (if user wants this)
 export function purgeImages(settings) {
     let deletepictures = settings.get_boolean('delete-previous');
+    let keepfavorites = settings.get_boolean('keep-favourites');
     if (deletepictures === false)
         return;
     let imagelist = imageListSortByDate(getImageList(settings));
     let maxpictures = settings.get_int('previous-days');
     let origlength = imagelist.length;
     while (imagelist.length > maxpictures) {
         var to_delete = imagelist.shift(); // get the first (oldest item from the list)
-        if (deletepictures && to_delete != '') {
+        var ok_to_delete = keepfavorites && (to_delete.favourite && to_delete.favourite === true);
+        if (deletepictures && to_delete != '' && ok_to_delete) {
             let imageFilename = imageToFilename(settings, to_delete);
             BingLog('deleting '+imageFilename);
             deleteImage(imageFilename);