Add URL.canParse

src/browser/url/url.zig

@@ -132,6 +132,18 @@ pub const URL = struct {
         return ada.clearHash(self.internal);
     }
 
+    /// Returns a boolean indicating whether or not an absolute URL,
+    /// or a relative URL combined with a base URL, are parsable and valid.
+    pub fn static_canParse(url: ConstructorArg, maybe_base: ?ConstructorArg, page: *Page) !bool {
+        const url_str = try url.toString(page);
+
+        if (maybe_base) |base| {
+            return ada.canParseWithBase(url_str, try base.toString(page));
+        }
+
+        return ada.canParse(url_str);
+    }
+
     /// Alias to get_href.
     pub fn _toString(self: *const URL, page: *Page) ![]const u8 {
         return self.get_href(page);

src/tests/url/url.html

@@ -99,3 +99,11 @@
     _ = new URL("://foo.bar/path?query#fragment");
   });
 </script>
+
+<script id=URL.canParse>
+  testing.expectEqual(true, URL.canParse("https://lightpanda.io"));
+  testing.expectEqual(false, URL.canParse("://lightpanda.io"));
+
+  testing.expectEqual(true, URL.canParse("/home", "https://lightpanda.io"));
+  testing.expectEqual(false, URL.canParse("lightpanda.io", "https"));
+</script>

vendor/ada/root.zig

@@ -33,6 +33,14 @@ pub fn parseWithBase(input: []const u8, base: []const u8) ParseError!URL {
     return url;
 }
 
+pub inline fn canParse(input: []const u8) bool {
+    return c.ada_can_parse(input.ptr, input.len);
+}
+
+pub inline fn canParseWithBase(input: []const u8, base: []const u8) bool {
+    return c.ada_can_parse_with_base(input.ptr, input.len, base.ptr, base.len);
+}
+
 pub inline fn getComponents(url: URL) *const URLComponents {
     return c.ada_get_components(url);
 }