1 files changed, 66 insertions, 0 deletions
diff --git a/dom/html/ConstraintValidation.cpp b/dom/html/ConstraintValidation.cpp
new file mode 100644
index 0000000000..1d256a3092
--- /dev/null
+++ b/dom/html/ConstraintValidation.cpp
@@ -0,0 +1,66 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ConstraintValidation.h"
+
+#include "mozilla/ErrorResult.h"
+#include "nsAString.h"
+#include "nsIContent.h"
+
+namespace mozilla::dom {
+
+void ConstraintValidation::GetValidationMessage(nsAString& aValidationMessage,
+                                                ErrorResult& aError) {
+  aValidationMessage.Truncate();
+
+  if (IsCandidateForConstraintValidation() && !IsValid()) {
+    if (GetValidityState(VALIDITY_STATE_CUSTOM_ERROR)) {
+      aValidationMessage.Assign(mCustomValidity);
+      if (aValidationMessage.Length() > sContentSpecifiedMaxLengthMessage) {
+        aValidationMessage.Truncate(sContentSpecifiedMaxLengthMessage);
+      }
+    } else if (GetValidityState(VALIDITY_STATE_TOO_LONG)) {
+      GetValidationMessage(aValidationMessage, VALIDITY_STATE_TOO_LONG);
+    } else if (GetValidityState(VALIDITY_STATE_TOO_SHORT)) {
+      GetValidationMessage(aValidationMessage, VALIDITY_STATE_TOO_SHORT);
+    } else if (GetValidityState(VALIDITY_STATE_VALUE_MISSING)) {
+      GetValidationMessage(aValidationMessage, VALIDITY_STATE_VALUE_MISSING);
+    } else if (GetValidityState(VALIDITY_STATE_TYPE_MISMATCH)) {
+      GetValidationMessage(aValidationMessage, VALIDITY_STATE_TYPE_MISMATCH);
+    } else if (GetValidityState(VALIDITY_STATE_PATTERN_MISMATCH)) {
+      GetValidationMessage(aValidationMessage, VALIDITY_STATE_PATTERN_MISMATCH);
+    } else if (GetValidityState(VALIDITY_STATE_RANGE_OVERFLOW)) {
+      GetValidationMessage(aValidationMessage, VALIDITY_STATE_RANGE_OVERFLOW);
+    } else if (GetValidityState(VALIDITY_STATE_RANGE_UNDERFLOW)) {
+      GetValidationMessage(aValidationMessage, VALIDITY_STATE_RANGE_UNDERFLOW);
+    } else if (GetValidityState(VALIDITY_STATE_STEP_MISMATCH)) {
+      GetValidationMessage(aValidationMessage, VALIDITY_STATE_STEP_MISMATCH);
+    } else if (GetValidityState(VALIDITY_STATE_BAD_INPUT)) {
+      GetValidationMessage(aValidationMessage, VALIDITY_STATE_BAD_INPUT);
+    } else {
+      // There should not be other validity states.
+      aError.Throw(NS_ERROR_UNEXPECTED);
+      return;
+    }
+  } else {
+    aValidationMessage.Truncate();
+  }
+}
+
+bool ConstraintValidation::CheckValidity() {
+  nsCOMPtr<nsIContent> content = do_QueryInterface(this);
+  MOZ_ASSERT(content, "This class should be inherited by HTML elements only!");
+  return nsIConstraintValidation::CheckValidity(*content);
+}
+
+ConstraintValidation::ConstraintValidation() = default;
+
+void ConstraintValidation::SetCustomValidity(const nsAString& aError) {
+  mCustomValidity.Assign(aError);
+  SetValidityState(VALIDITY_STATE_CUSTOM_ERROR, !mCustomValidity.IsEmpty());
+}
+
+}  // namespace mozilla::dom