Introduce toHTMLInputElement(Node*), and use it.

Source/core/html/shadow/TextControlInnerElements.cpp

 /*
  * Copyright (C) 2006, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 138 matching lines @@
         if (input->maxResults() < 0)
             return decorationId;
         return resultsDecorationId;
     }
     return resultsDecorationId;
 }
 
 void SearchFieldDecorationElement::defaultEventHandler(Event* event)
 {
     // On mousedown, focus the search field
-    HTMLInputElement* input = static_cast<HTMLInputElement*>(shadowHost());
+    HTMLInputElement* input = toHTMLInputElement(shadowHost());
     if (input && event->type() == eventNames().mousedownEvent && event->isMouseEvent() && static_cast<MouseEvent*>(event)->button() == LeftButton) {
         input->focus();
         input->select();
         RenderSearchField* renderer = toRenderSearchField(input->renderer());
         event->setDefaultHandled();
     }
 
     if (!event->defaultHandled())
         HTMLDivElement::defaultEventHandler(event);
 }
@@ skipping 28 matching lines @@
         if (Frame* frame = document()->frame())
             frame->eventHandler()->setCapturingMouseEventsNode(0);
     }
     HTMLDivElement::detach();
 }
 
 
 void SearchFieldCancelButtonElement::defaultEventHandler(Event* event)
 {
     // If the element is visible, on mouseup, clear the value, and set selection
-    RefPtr<HTMLInputElement> input(static_cast<HTMLInputElement*>(shadowHost()));
+    RefPtr<HTMLInputElement> input(toHTMLInputElement(shadowHost()));
     if (!input || input->isDisabledOrReadOnly()) {
         if (!event->defaultHandled())
             HTMLDivElement::defaultEventHandler(event);
         return;
     }
 
     if (event->type() == eventNames().mousedownEvent && event->isMouseEvent() && static_cast<MouseEvent*>(event)->button() == LeftButton) {
         if (renderer() && renderer()->visibleToHitTesting()) {
             if (Frame* frame = document()->frame()) {
                 frame->eventHandler()->setCapturingMouseEventsNode(this);
@@ skipping 18 matching lines @@
             }
         }
     }
 
     if (!event->defaultHandled())
         HTMLDivElement::defaultEventHandler(event);
 }
 
 bool SearchFieldCancelButtonElement::willRespondToMouseClickEvents()
 {
-    const HTMLInputElement* input = static_cast<HTMLInputElement*>(shadowHost());
+    const HTMLInputElement* input = toHTMLInputElement(shadowHost());
     if (input && !input->isDisabledOrReadOnly())
         return true;
 
     return HTMLDivElement::willRespondToMouseClickEvents();
 }
 
 // ----------------------------
 
 #if ENABLE(INPUT_SPEECH)
 
@@ skipping 24 matching lines @@
 {
     // For privacy reasons, only allow clicks directly coming from the user.
     if (!ScriptController::processingUserGesture()) {
         HTMLDivElement::defaultEventHandler(event);
         return;
     }
 
     // The call to focus() below dispatches a focus event, and an event handler in the page might
     // remove the input element from DOM. To make sure it remains valid until we finish our work
     // here, we take a temporary reference.
-    RefPtr<HTMLInputElement> input(static_cast<HTMLInputElement*>(shadowHost()));
+    RefPtr<HTMLInputElement> input(toHTMLInputElement(shadowHost()));
 
     if (!input || input->isDisabledOrReadOnly()) {
         if (!event->defaultHandled())
             HTMLDivElement::defaultEventHandler(event);
         return;
     }
 
     // On mouse down, select the text and set focus.
     if (event->type() == eventNames().mousedownEvent && event->isMouseEvent() && static_cast<MouseEvent*>(event)->button() == LeftButton) {
         if (renderer() && renderer()->visibleToHitTesting()) {
@@ skipping 31 matching lines @@
         }
         event->setDefaultHandled();
     }
 
     if (!event->defaultHandled())
         HTMLDivElement::defaultEventHandler(event);
 }
 
 bool InputFieldSpeechButtonElement::willRespondToMouseClickEvents()
 {
-    const HTMLInputElement* input = static_cast<HTMLInputElement*>(shadowHost());
+    const HTMLInputElement* input = toHTMLInputElement(shadowHost());
     if (input && !input->isDisabledOrReadOnly())
         return true;
 
     return HTMLDivElement::willRespondToMouseClickEvents();
 }
 
 void InputFieldSpeechButtonElement::setState(SpeechInputState state)
 {
     if (m_state != state) {
         m_state = state;
@@ skipping 16 matching lines @@
     setState(Idle);
 }
 
 void InputFieldSpeechButtonElement::setRecognitionResult(int, const SpeechInputResultArray& results)
 {
     m_results = results;
 
     // The call to setValue() below dispatches an event, and an event handler in the page might
     // remove the input element from DOM. To make sure it remains valid until we finish our work
     // here, we take a temporary reference.
-    RefPtr<HTMLInputElement> input(static_cast<HTMLInputElement*>(shadowHost()));
+    RefPtr<HTMLInputElement> input(toHTMLInputElement(shadowHost()));
     if (!input || input->isDisabledOrReadOnly())
         return;
 
     RefPtr<InputFieldSpeechButtonElement> holdRefButton(this);
     if (document() && document()->domWindow()) {
         // Call selectionChanged, causing the element to cache the selection,
         // so that the text event inserts the text in this element even if
         // focus has moved away from it.
         input->selectionChanged(false);
         input->dispatchEvent(TextEvent::create(document()->domWindow(), results.isEmpty() ? "" : results[0]->utterance(), TextEventInputOther));
@@ skipping 32 matching lines @@
     }
 
     HTMLDivElement::detach();
 }
 
 void InputFieldSpeechButtonElement::startSpeechInput()
 {
     if (m_state != Idle)
         return;
 
-    RefPtr<HTMLInputElement> input = static_cast<HTMLInputElement*>(shadowHost());
+    RefPtr<HTMLInputElement> input = toHTMLInputElement(shadowHost());
     AtomicString language = input->computeInheritedLanguage();
     String grammar = input->getAttribute(webkitgrammarAttr);
     IntRect rect = document()->view()->contentsToRootView(pixelSnappedBoundingBox());
     if (speechInput()->startRecognition(m_listenerId, rect, language, grammar, document()->securityOrigin()))
         setState(Recording);
 }
 
 void InputFieldSpeechButtonElement::stopSpeechInput()
 {
     if (m_state == Recording)
         speechInput()->stopRecording(m_listenerId);
 }
 
 const AtomicString& InputFieldSpeechButtonElement::shadowPseudoId() const
 {
     DEFINE_STATIC_LOCAL(AtomicString, pseudoId, ("-webkit-input-speech-button", AtomicString::ConstructFromLiteral));
     return pseudoId;
 }
 
 #endif // ENABLE(INPUT_SPEECH)
 
 }