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/**
* 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.
*
*/
#include "config.h"
#include "RenderButton.h"
#include "Document.h"
#include "GraphicsContext.h"
#include "HTMLInputElement.h"
#include "HTMLNames.h"
#include "RenderTextFragment.h"
#include "RenderTheme.h"
#include "StyleInheritedData.h"
#if PLATFORM(IOS)
#include "RenderThemeIOS.h"
#endif
namespace WebCore {
using namespace HTMLNames;
RenderButton::RenderButton(HTMLFormControlElement& element, Ref<RenderStyle>&& style)
: RenderFlexibleBox(element, WTFMove(style))
, m_buttonText(0)
, m_inner(0)
{
}
RenderButton::~RenderButton()
{
}
HTMLFormControlElement& RenderButton::formControlElement() const
{
return downcast<HTMLFormControlElement>(nodeForNonAnonymous());
}
bool RenderButton::canBeSelectionLeaf() const
{
return formControlElement().hasEditableStyle();
}
bool RenderButton::hasLineIfEmpty() const
{
return is<HTMLInputElement>(formControlElement());
}
void RenderButton::addChild(RenderObject* newChild, RenderObject* beforeChild)
{
if (!m_inner) {
// Create an anonymous block.
ASSERT(!firstChild());
m_inner = createAnonymousBlock(style().display());
setupInnerStyle(&m_inner->style());
RenderFlexibleBox::addChild(m_inner);
}
m_inner->addChild(newChild, beforeChild);
}
void RenderButton::removeChild(RenderObject& oldChild)
{
// m_inner should be the only child, but checking for direct children who
// are not m_inner prevents security problems when that assumption is
// violated.
if (&oldChild == m_inner || !m_inner || oldChild.parent() == this) {
ASSERT(&oldChild == m_inner || !m_inner);
RenderFlexibleBox::removeChild(oldChild);
m_inner = nullptr;
} else
m_inner->removeChild(oldChild);
}
void RenderButton::styleWillChange(StyleDifference diff, const RenderStyle& newStyle)
{
if (m_inner) {
// RenderBlock::setStyle is going to apply a new style to the inner block, which
// will have the initial flex value, 0. The current value is 1, because we set
// it right below. Here we change it back to 0 to avoid getting a spurious layout hint
// because of the difference. Same goes for the other properties.
// FIXME: Make this hack unnecessary.
m_inner->style().setFlexGrow(newStyle.initialFlexGrow());
m_inner->style().setMarginTop(newStyle.initialMargin());
m_inner->style().setMarginBottom(newStyle.initialMargin());
}
RenderBlock::styleWillChange(diff, newStyle);
}
void RenderButton::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderBlock::styleDidChange(diff, oldStyle);
if (m_inner) // RenderBlock handled updating the anonymous block's style.
setupInnerStyle(&m_inner->style());
}
void RenderButton::setupInnerStyle(RenderStyle* innerStyle)
{
ASSERT(style().hasPseudoStyle(FIRST_LETTER) || innerStyle->refCount() == 1);
// RenderBlock::createAnonymousBlock creates a new RenderStyle, so this is
// safe to modify.
// FIXME: I don't see how the comment above is accurate when this is called
// from the RenderButton::styleDidChange function.
innerStyle->setFlexGrow(1.0f);
// Use margin:auto instead of align-items:center to get safe centering, i.e.
// when the content overflows, treat it the same as align-items: flex-start.
innerStyle->setMarginTop(Length());
innerStyle->setMarginBottom(Length());
innerStyle->setFlexDirection(style().flexDirection());
}
void RenderButton::updateFromElement()
{
// If we're an input element, we may need to change our button text.
if (is<HTMLInputElement>(formControlElement())) {
HTMLInputElement& input = downcast<HTMLInputElement>(formControlElement());
String value = input.valueWithDefault();
setText(value);
}
}
void RenderButton::setText(const String& str)
{
if (str.isEmpty()) {
if (m_buttonText) {
m_buttonText->destroy();
m_buttonText = 0;
}
} else {
if (m_buttonText)
m_buttonText->setText(str.impl());
else {
m_buttonText = new RenderTextFragment(document(), str);
addChild(m_buttonText);
}
}
}
String RenderButton::text() const
{
return m_buttonText ? m_buttonText->text() : 0;
}
bool RenderButton::canHaveGeneratedChildren() const
{
// Input elements can't have generated children, but button elements can. We'll
// write the code assuming any other button types that might emerge in the future
// can also have children.
return !is<HTMLInputElement>(formControlElement());
}
LayoutRect RenderButton::controlClipRect(const LayoutPoint& additionalOffset) const
{
// Clip to the padding box to at least give content the extra padding space.
return LayoutRect(additionalOffset.x() + borderLeft(), additionalOffset.y() + borderTop(), width() - borderLeft() - borderRight(), height() - borderTop() - borderBottom());
}
#if PLATFORM(IOS)
void RenderButton::layout()
{
RenderFlexibleBox::layout();
// FIXME: We should not be adjusting styles during layout. See <rdar://problem/7675493>.
RenderThemeIOS::adjustRoundBorderRadius(style(), *this);
}
#endif
} // namespace WebCore
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