Source/WebCore/html/shadow/TextControlInnerElements.cpp

/*
 * Copyright (C) 2006, 2008, 2010, 2014 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
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "TextControlInnerElements.h"

#include "Document.h"
#include "EventNames.h"
#include "Frame.h"
#include "HTMLInputElement.h"
#include "HTMLNames.h"
#include "LocalizedStrings.h"
#include "MouseEvent.h"
#include "PlatformMouseEvent.h"
#include "RenderSearchField.h"
#include "RenderTextControl.h"
#include "RenderView.h"
#include "ScriptController.h"
#include "ShadowRoot.h"
#include "StyleResolver.h"
#include "TextEvent.h"
#include "TextEventInputType.h"
#include <wtf/Ref.h>

namespace WebCore {

using namespace HTMLNames;

TextControlInnerContainer::TextControlInnerContainer(Document& document)
    : HTMLDivElement(divTag, document)
{
}

Ref<TextControlInnerContainer> TextControlInnerContainer::create(Document& document)
{
    return adoptRef(*new TextControlInnerContainer(document));
}
    
RenderPtr<RenderElement> TextControlInnerContainer::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
    return createRenderer<RenderTextControlInnerContainer>(*this, WTFMove(style));
}

TextControlInnerElement::TextControlInnerElement(Document& document)
    : HTMLDivElement(divTag, document)
{
    setHasCustomStyleResolveCallbacks();
}

Ref<TextControlInnerElement> TextControlInnerElement::create(Document& document)
{
    return adoptRef(*new TextControlInnerElement(document));
}

Optional<ElementStyle> TextControlInnerElement::resolveCustomStyle(const RenderStyle&, const RenderStyle* shadowHostStyle)
{
    auto innerContainerStyle = RenderStyle::createPtr();
    innerContainerStyle->inheritFrom(shadowHostStyle);

    innerContainerStyle->setFlexGrow(1);
    // min-width: 0; is needed for correct shrinking.
    innerContainerStyle->setMinWidth(Length(0, Fixed));
    innerContainerStyle->setDisplay(BLOCK);
    innerContainerStyle->setDirection(LTR);

    // We don't want the shadow dom to be editable, so we set this block to read-only in case the input itself is editable.
    innerContainerStyle->setUserModify(READ_ONLY);

    return ElementStyle(WTFMove(innerContainerStyle));
}

// ---------------------------

inline TextControlInnerTextElement::TextControlInnerTextElement(Document& document)
    : HTMLDivElement(divTag, document)
{
    setHasCustomStyleResolveCallbacks();
}

Ref<TextControlInnerTextElement> TextControlInnerTextElement::create(Document& document)
{
    return adoptRef(*new TextControlInnerTextElement(document));
}

void TextControlInnerTextElement::defaultEventHandler(Event& event)
{
    // FIXME: In the future, we should add a way to have default event listeners.
    // Then we would add one to the text field's inner div, and we wouldn't need this subclass.
    // Or possibly we could just use a normal event listener.
    if (event.isBeforeTextInsertedEvent() || event.type() == eventNames().webkitEditableContentChangedEvent) {
        Element* shadowAncestor = shadowHost();
        // A TextControlInnerTextElement can have no host if its been detached,
        // but kept alive by an EditCommand. In this case, an undo/redo can
        // cause events to be sent to the TextControlInnerTextElement. To
        // prevent an infinite loop, we must check for this case before sending
        // the event up the chain.
        if (shadowAncestor)
            shadowAncestor->defaultEventHandler(event);
    }
    if (!event.defaultHandled())
        HTMLDivElement::defaultEventHandler(event);
}

RenderPtr<RenderElement> TextControlInnerTextElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
    return createRenderer<RenderTextControlInnerBlock>(*this, WTFMove(style));
}

RenderTextControlInnerBlock* TextControlInnerTextElement::renderer() const
{
    return downcast<RenderTextControlInnerBlock>(HTMLDivElement::renderer());
}

Optional<ElementStyle> TextControlInnerTextElement::resolveCustomStyle(const RenderStyle&, const RenderStyle* shadowHostStyle)
{
    auto style = downcast<HTMLTextFormControlElement>(*shadowHost()).createInnerTextStyle(*shadowHostStyle);
    return ElementStyle(std::make_unique<RenderStyle>(WTFMove(style)));
}

// ----------------------------

TextControlPlaceholderElement::TextControlPlaceholderElement(Document& document)
    : HTMLDivElement(divTag, document)
{
    setPseudo(AtomicString("placeholder", AtomicString::ConstructFromLiteral));
    setHasCustomStyleResolveCallbacks();
}

Optional<ElementStyle> TextControlPlaceholderElement::resolveCustomStyle(const RenderStyle& parentStyle, const RenderStyle* shadowHostStyle)
{
    auto style = resolveStyle(&parentStyle);

    auto& controlElement = downcast<HTMLTextFormControlElement>(*containingShadowRoot()->host());
    style.renderStyle->setDisplay(controlElement.isPlaceholderVisible() ? BLOCK : NONE);

    if (is<HTMLInputElement>(controlElement)) {
        auto& inputElement = downcast<HTMLInputElement>(controlElement);
        style.renderStyle->setTextOverflow(inputElement.shouldTruncateText(*shadowHostStyle) ? TextOverflowEllipsis : TextOverflowClip);
    }
    return WTFMove(style);
}

// ----------------------------

inline SearchFieldResultsButtonElement::SearchFieldResultsButtonElement(Document& document)
    : HTMLDivElement(divTag, document)
{
}

Ref<SearchFieldResultsButtonElement> SearchFieldResultsButtonElement::create(Document& document)
{
    return adoptRef(*new SearchFieldResultsButtonElement(document));
}

void SearchFieldResultsButtonElement::defaultEventHandler(Event& event)
{
    // On mousedown, bring up a menu, if needed
    auto* input = downcast<HTMLInputElement>(shadowHost());
    if (input && event.type() == eventNames().mousedownEvent && is<MouseEvent>(event) && downcast<MouseEvent>(event).button() == LeftButton) {
        input->focus();
        input->select();
#if !PLATFORM(IOS)
        if (auto* renderer = input->renderer()) {
            auto& searchFieldRenderer = downcast<RenderSearchField>(*renderer);
            if (searchFieldRenderer.popupIsVisible())
                searchFieldRenderer.hidePopup();
            else if (input->maxResults() > 0)
                searchFieldRenderer.showPopup();
        }
#endif
        event.setDefaultHandled();
    }

    if (!event.defaultHandled())
        HTMLDivElement::defaultEventHandler(event);
}

#if !PLATFORM(IOS)
bool SearchFieldResultsButtonElement::willRespondToMouseClickEvents()
{
    return true;
}
#endif

// ----------------------------

inline SearchFieldCancelButtonElement::SearchFieldCancelButtonElement(Document& document)
    : HTMLDivElement(divTag, document)
{
    setPseudo(AtomicString("-webkit-search-cancel-button", AtomicString::ConstructFromLiteral));
#if !PLATFORM(IOS)
    setAttributeWithoutSynchronization(aria_labelAttr, AXSearchFieldCancelButtonText());
#endif
    setAttributeWithoutSynchronization(roleAttr, AtomicString("button", AtomicString::ConstructFromLiteral));
}

Ref<SearchFieldCancelButtonElement> SearchFieldCancelButtonElement::create(Document& document)
{
    return adoptRef(*new SearchFieldCancelButtonElement(document));
}

void SearchFieldCancelButtonElement::defaultEventHandler(Event& event)
{
    RefPtr<HTMLInputElement> input(downcast<HTMLInputElement>(shadowHost()));
    if (!input || input->isDisabledOrReadOnly()) {
        if (!event.defaultHandled())
            HTMLDivElement::defaultEventHandler(event);
        return;
    }

    if (event.type() == eventNames().mousedownEvent && is<MouseEvent>(event) && downcast<MouseEvent>(event).button() == LeftButton) {
        input->focus();
        input->select();
        event.setDefaultHandled();
    }

    if (event.type() == eventNames().clickEvent) {
        input->setValueForUser(emptyString());
        input->onSearch();
        event.setDefaultHandled();
    }

    if (!event.defaultHandled())
        HTMLDivElement::defaultEventHandler(event);
}

#if !PLATFORM(IOS)
bool SearchFieldCancelButtonElement::willRespondToMouseClickEvents()
{
    const HTMLInputElement* input = downcast<HTMLInputElement>(shadowHost());
    if (input && !input->isDisabledOrReadOnly())
        return true;

    return HTMLDivElement::willRespondToMouseClickEvents();
}
#endif

}