1 /*
2 * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21 #include "config.h"
22 #include "core/rendering/RenderSlider.h"
23
24 #include "core/dom/shadow/ShadowRoot.h"
25 #include "core/html/HTMLInputElement.h"
26 #include "core/html/shadow/ShadowElementNames.h"
27 #include "core/html/shadow/SliderThumbElement.h"
28 #include "core/rendering/LayoutRectRecorder.h"
29 #include "wtf/MathExtras.h"
30
31 using std::min;
32
33 namespace WebCore {
34
35 const int RenderSlider::defaultTrackLength = 129;
36
RenderSlider(HTMLInputElement * element)37 RenderSlider::RenderSlider(HTMLInputElement* element)
38 : RenderFlexibleBox(element)
39 {
40 // We assume RenderSlider works only with <input type=range>.
41 ASSERT(element->isRangeControl());
42 }
43
~RenderSlider()44 RenderSlider::~RenderSlider()
45 {
46 }
47
baselinePosition(FontBaseline,bool,LineDirectionMode,LinePositionMode linePositionMode) const48 int RenderSlider::baselinePosition(FontBaseline, bool /*firstLine*/, LineDirectionMode, LinePositionMode linePositionMode) const
49 {
50 ASSERT(linePositionMode == PositionOnContainingLine);
51 // FIXME: Patch this function for writing-mode.
52 return height() + marginTop();
53 }
54
computeIntrinsicLogicalWidths(LayoutUnit & minLogicalWidth,LayoutUnit & maxLogicalWidth) const55 void RenderSlider::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
56 {
57 maxLogicalWidth = defaultTrackLength * style()->effectiveZoom();
58 if (!style()->width().isPercent())
59 minLogicalWidth = maxLogicalWidth;
60 }
61
computePreferredLogicalWidths()62 void RenderSlider::computePreferredLogicalWidths()
63 {
64 m_minPreferredLogicalWidth = 0;
65 m_maxPreferredLogicalWidth = 0;
66
67 if (style()->width().isFixed() && style()->width().value() > 0)
68 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(style()->width().value());
69 else
70 computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
71
72 if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) {
73 m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->minWidth().value()));
74 m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->minWidth().value()));
75 }
76
77 if (style()->maxWidth().isFixed()) {
78 m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->maxWidth().value()));
79 m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->maxWidth().value()));
80 }
81
82 LayoutUnit toAdd = borderAndPaddingWidth();
83 m_minPreferredLogicalWidth += toAdd;
84 m_maxPreferredLogicalWidth += toAdd;
85
86 clearPreferredLogicalWidthsDirty();
87 }
88
sliderThumbElement() const89 inline SliderThumbElement* RenderSlider::sliderThumbElement() const
90 {
91 return toSliderThumbElement(toElement(node())->userAgentShadowRoot()->getElementById(ShadowElementNames::sliderThumb()));
92 }
93
layout()94 void RenderSlider::layout()
95 {
96 LayoutRectRecorder recorder(*this);
97 // FIXME: Find a way to cascade appearance.
98 // http://webkit.org/b/62535
99 RenderBox* thumbBox = sliderThumbElement()->renderBox();
100 if (thumbBox && thumbBox->isSliderThumb())
101 static_cast<RenderSliderThumb*>(thumbBox)->updateAppearance(style());
102
103 RenderFlexibleBox::layout();
104 }
105
inDragMode() const106 bool RenderSlider::inDragMode() const
107 {
108 return sliderThumbElement()->active();
109 }
110
111 } // namespace WebCore
112