Warns and removes if parent reference '&' is used w/o parent, fixes #10327

Change-Id: I58eaf3f2acd27a7627c8df31e411a75fc4a48016

4 files changed, 37 insertions, 0 deletions

diff --git a/theme-compiler/src/com/vaadin/sass/ScssStylesheet.java b/theme-compiler/src/com/vaadin/sass/ScssStylesheet.java
index 5f46844641..216b03edbe 100644
--- a/theme-compiler/src/com/vaadin/sass/ScssStylesheet.java
+++ b/theme-compiler/src/com/vaadin/sass/ScssStylesheet.java
@@ -23,6 +23,7 @@ import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
+import java.util.logging.Logger;
 
 import org.w3c.css.sac.CSSException;
 import org.w3c.css.sac.InputSource;
@@ -250,4 +251,7 @@ public class ScssStylesheet extends Node {
         return lastNodeAdded;
     }
 
+    public static final void warning(String msg) {
+        Logger.getLogger(ScssStylesheet.class.getName()).warning(msg);
+    }
 }
diff --git a/theme-compiler/src/com/vaadin/sass/visitor/BlockNodeHandler.java b/theme-compiler/src/com/vaadin/sass/visitor/BlockNodeHandler.java
index d128da0b4b..f8f893b8fd 100644
--- a/theme-compiler/src/com/vaadin/sass/visitor/BlockNodeHandler.java
+++ b/theme-compiler/src/com/vaadin/sass/visitor/BlockNodeHandler.java
@@ -61,9 +61,34 @@ public class BlockNodeHandler {
 
         if (parent instanceof BlockNode) {
             combineParentSelectorListToChild(node);
+
+        } else if (node.getSelectors().contains("&")) {
+            ScssStylesheet.warning("Base-level rule contains"
+                    + " the parent-selector-referencing character '&';"
+                    + " the character will be removed:\n" + node);
+            removeParentReference(node);
         }
     }
 
+    /**
+     * Goes through the selector list of the given BlockNode and removes the '&'
+     * character from the selectors.
+     * 
+     * @param node
+     */
+    private static void removeParentReference(BlockNode node) {
+        ArrayList<String> newList = new ArrayList<String>();
+        for (String childSelector : node.getSelectorList()) {
+            // remove parent selector
+            if (childSelector.contains("&")) {
+                newList.add(childSelector.replace("&", ""));
+            } else {
+                newList.add(childSelector);
+            }
+        }
+        node.setSelectorList(newList);
+    }
+
     private static void combineParentSelectorListToChild(BlockNode node) {
         ArrayList<String> newList = new ArrayList<String>();
         BlockNode parentBlock = (BlockNode) node.getParentNode();
diff --git a/theme-compiler/tests/resources/css/parent-selector.css b/theme-compiler/tests/resources/css/parent-selector.css
index 1aa389f593..2a73313f0c 100644
--- a/theme-compiler/tests/resources/css/parent-selector.css
+++ b/theme-compiler/tests/resources/css/parent-selector.css
@@ -41,4 +41,8 @@ body.firefox a {
 
 .root2 .part .one, .root2 .part .non-parent, .root2 .part2 .one, .root2 .part2 .non-parent {
 	color: blue;
+}
+
+.drop-parent-reference {
+	color: green;
 }
\ No newline at end of file
diff --git a/theme-compiler/tests/resources/scss/parent-selector.scss b/theme-compiler/tests/resources/scss/parent-selector.scss
index c0ef46afb3..74f0e15b9e 100644
--- a/theme-compiler/tests/resources/scss/parent-selector.scss
+++ b/theme-compiler/tests/resources/scss/parent-selector.scss
@@ -46,4 +46,8 @@ a {
 			color: blue;
 		}
 	}
+}
+
+&.drop-parent-reference {
+	color: green;
 }
\ No newline at end of file