css: support unescaped ':' in attribute name

Author: syjer

src/main/java/ch/digitalfondue/jfiveparse/CSS.java

@@ -65,7 +65,7 @@ record Combinator(int type) implements CssSelector {}
     record TagSelector(String name, String namespace) implements CssSelector {}
 
 
-
+    static final int IGNORE_CASE_UNKNOWN = -1;
     static final int IGNORE_CASE_TRUE = 0;
     static final int IGNORE_CASE_FALSE = 1;
     static final int IGNORE_CASE_QUIRKS = 2;
@@ -338,6 +338,12 @@ int parse() {
                                 name = getName(1);
                             }
                         }
+
+                        // Support unescaped colons in attribute names (e.g., xml:lang)
+                        while (selector.charAt(selectorIndex) == ':') {
+                            name = name + ":" + getName(1);
+                        }
+
                         stripWhitespace(0);
                         // Determine comparison operation
                         int action = ATTR_ACTION_EXISTS;
@@ -355,7 +361,7 @@ int parse() {
                         }
 
                         String value = "";
-                        int ignoreCase = -1;
+                        int ignoreCase = IGNORE_CASE_UNKNOWN;
 
                         if (action != ATTR_ACTION_EXISTS) {
                             if (isQuote(charAt(selectorIndex))) {

src/test/java/ch/digitalfondue/jfiveparse/CSSTest.java

@@ -205,6 +205,21 @@ void checkEscapedWhitespace() {
         )), r);
     }
 
+    @Test
+    void checkUnescapedColon() {
+        var r = CSS.parseSelector("*[xml:lang|=\"es\"]");
+        assertEquals(List.of(List.of(
+                new CSS.UniversalSelector(null),
+                new CSS.AttributeSelector(
+                        "xml:lang",
+                        CSS.ATTR_ACTION_HYPHEN,
+                        "es",
+                        CSS.IGNORE_CASE_UNKNOWN,
+                        null
+                )
+        )), r);
+    }
+
     // TODO: add all the missing String.raw tests
 
     record NthExprAB(String expr, int a, int b) {}