Add simple parsing for ICU MessageFormat placeholder

Author: digilist

src/main/java/fr/adrienbrault/idea/symfony2plugin/translation/dict/TranslationUtil.java

@@ -402,6 +402,15 @@ public static Set<String> getPlaceholderFromTranslation(@NotNull String text) {
             placeholder.add(matcher.group(1));
         }
 
+        // Simple parser for MessageFormat by the ICU project
+        matcher = Pattern.compile("(\\{\\s*[^{]*\\s*})").matcher(text);
+        while(matcher.find()){
+            // Keep the whole placeholder for consistency with other formats, but also add just the placeholder name
+            // as this is allowed with the ICU format.
+            placeholder.add(matcher.group(1));
+            placeholder.add(matcher.group(1).replace("{", "").replace("}", "").trim());
+        }
+
         return placeholder;
     }
 

src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/translation/dict/TranslationUtilTest.java

@@ -188,6 +188,14 @@ public void testGetPlaceholderFromTranslationForDrupalStyle2() {
         assertContainsElements(placeholder, "%title", "%url");
     }
 
+    public void testGetPlaceholderFromTranslationForIcuStyle() {
+        Set<String> placeholder = TranslationUtil.getPlaceholderFromTranslation(
+            "Updated URL for feed {title} to {url}."
+        );
+
+        assertContainsElements(placeholder, "{title}", "{url}", "title", "url");
+    }
+
     public void testGetPlaceholderFromTranslationForKeyAndDomain() {
         Set<String> placeholder = TranslationUtil.getPlaceholderFromTranslation(
             getProject(), "my_foobar", "symfony"