Wrap keywords with quotation marks if they are tags

app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryListScene.java

@@ -500,6 +500,23 @@ public final class GalleryListScene extends BaseScene
         }
     }
 
+    private String wrapTagKeyword(String keyword) {
+        keyword = keyword.trim();
+
+        int index1 = keyword.indexOf(':');
+        if (index1 == -1 || index1 >= keyword.length() - 1) {
+            // Can't find :, or : is the last char
+            return keyword;
+        }
+        int index2 = keyword.indexOf(' ');
+        if (index2 <= index1) {
+            // Can't find space, or space is before :
+            return keyword;
+        }
+
+        return keyword.substring(0, index1 + 1) + "\"" + keyword.substring(index1 + 1) + "$\"";
+    }
+
     // Update search bar title, drawer checked item
     private void onUpdateUrlBuilder() {
         ListUrlBuilder builder = mUrlBuilder;
@@ -518,6 +535,9 @@ public final class GalleryListScene extends BaseScene
 
         // Update search edit text
         if (!TextUtils.isEmpty(keyword) && null != mSearchBar) {
+            if (builder.getMode() == ListUrlBuilder.MODE_TAG) {
+                keyword = wrapTagKeyword(keyword);
+            }
             mSearchBar.setText(keyword);
             mSearchBar.cursorToEnd();
         }