Support HTML5 form validation feature

HTML5 provides built-in form validation that is supported by chromium.
The form validation messages should be shown by the browser therefore
new MessageBubble UI element has been added to Quick and Widget
implementations.
This patch implements chromium's form validation events and shows the
messages in a MessageBubble.

Change-Id: I0c8f4f102823117e2bfb16ff8a4c503635491939
Reviewed-by: Andras Becsi <andras.becsi@theqtcompany.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/core/web_contents_adapter_client.h b/src/core/web_contents_adapter_client.h
index d67accec2..3ed3ab9ab 100644
--- a/src/core/web_contents_adapter_client.h
+++ b/src/core/web_contents_adapter_client.h
@@ -182,6 +182,9 @@ public:
     virtual void runMediaAccessPermissionRequest(const QUrl &securityOrigin, MediaRequestFlags requestFlags) = 0;
     virtual void runMouseLockPermissionRequest(const QUrl &securityOrigin) = 0;
     virtual WebEngineSettings *webEngineSettings() const = 0;
+    virtual void showValidationMessage(const QRect &anchor, const QString &mainText, const QString &subText) = 0;
+    virtual void hideValidationMessage() = 0;
+    virtual void moveValidationMessage(const QRect &anchor) = 0;
 
     virtual void allowCertificateError(const QSharedPointer<CertificateErrorController> &errorController) = 0;