RenderButton.h   [plain text]

/*
 * Copyright (C) 2005 Apple Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#pragma once

#include "RenderFlexibleBox.h"
#include "Timer.h"
#include <memory>

namespace WebCore {

class HTMLFormControlElement;
class RenderTextFragment;

// RenderButtons are just like normal flexboxes except that they will generate an anonymous block child.
// For inputs, they will also generate an anonymous RenderText and keep its style and content up
// to date as the button changes.
class RenderButton final : public RenderFlexibleBox {
public:
    RenderButton(HTMLFormControlElement&, RenderStyle&&);
    virtual ~RenderButton();

    HTMLFormControlElement& formControlElement() const;

    bool canBeSelectionLeaf() const override;

    void addChild(RenderObject* newChild, RenderObject *beforeChild = 0) override;
    void removeChild(RenderObject&) override;
    void removeLeftoverAnonymousBlock(RenderBlock*) override { }
    bool createsAnonymousWrapper() const override { return true; }

    void setupInnerStyle(RenderStyle*);
    void updateFromElement() override;

    bool canHaveGeneratedChildren() const override;
    bool hasControlClip() const override { return true; }
    LayoutRect controlClipRect(const LayoutPoint&) const override;

    void setText(const String&);
    String text() const;

#if PLATFORM(IOS)
    void layout() override;
#endif

private:
    void element() const = delete;

    const char* renderName() const override { return "RenderButton"; }
    bool isRenderButton() const override { return true; }

    void styleWillChange(StyleDifference, const RenderStyle& newStyle) override;
    void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;

    bool hasLineIfEmpty() const override;

    bool requiresForcedStyleRecalcPropagation() const override { return true; }

    bool isFlexibleBoxImpl() const override { return true; }

    RenderTextFragment* m_buttonText;
    RenderBlock* m_inner;
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderButton, isRenderButton())