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/*
* Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Publicw
* 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 "third_party/blink/renderer/core/layout/layout_slider.h"
#include "third_party/blink/renderer/core/dom/shadow_root.h"
#include "third_party/blink/renderer/core/html/forms/html_input_element.h"
#include "third_party/blink/renderer/core/html/forms/slider_thumb_element.h"
#include "third_party/blink/renderer/core/html/shadow/shadow_element_names.h"
#include "third_party/blink/renderer/core/input_type_names.h"
#include "third_party/blink/renderer/platform/wtf/math_extras.h"
namespace blink {
const int LayoutSlider::kDefaultTrackLength = 129;
LayoutSlider::LayoutSlider(HTMLInputElement* element)
: LayoutFlexibleBox(element) {
// We assume LayoutSlider works only with <input type=range>.
DCHECK_EQ(element->type(), input_type_names::kRange);
}
LayoutSlider::~LayoutSlider() = default;
LayoutUnit LayoutSlider::BaselinePosition(
FontBaseline,
bool /*firstLine*/,
LineDirectionMode,
LinePositionMode line_position_mode) const {
DCHECK_EQ(line_position_mode, kPositionOnContainingLine);
// FIXME: Patch this function for writing-mode.
return Size().Height() + MarginTop();
}
void LayoutSlider::ComputeIntrinsicLogicalWidths(
LayoutUnit& min_logical_width,
LayoutUnit& max_logical_width) const {
max_logical_width =
LayoutUnit(kDefaultTrackLength * StyleRef().EffectiveZoom());
if (!StyleRef().Width().IsPercentOrCalc())
min_logical_width = max_logical_width;
}
inline SliderThumbElement* LayoutSlider::GetSliderThumbElement() const {
return To<SliderThumbElement>(
To<Element>(GetNode())->UserAgentShadowRoot()->getElementById(
shadow_element_names::SliderThumb()));
}
bool LayoutSlider::InDragMode() const {
return GetSliderThumbElement()->IsActive();
}
} // namespace blink
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