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/InputTypeNames.h"
25 #include "core/dom/shadow/ShadowRoot.h"
26 #include "core/html/HTMLInputElement.h"
27 #include "core/html/shadow/ShadowElementNames.h"
28 #include "core/html/shadow/SliderThumbElement.h"
29 #include "core/rendering/RenderSliderThumb.h"
30 #include "wtf/MathExtras.h"
31
32 using std::min;
33
34 namespace blink {
35
36 const int RenderSlider::defaultTrackLength = 129;
37
RenderSlider(HTMLInputElement * element)38 RenderSlider::RenderSlider(HTMLInputElement* element)
39 : RenderFlexibleBox(element)
40 {
41 // We assume RenderSlider works only with <input type=range>.
42 ASSERT(element->type() == InputTypeNames::range);
43 }
44
~RenderSlider()45 RenderSlider::~RenderSlider()
46 {
47 }
48
baselinePosition(FontBaseline,bool,LineDirectionMode,LinePositionMode linePositionMode) const49 int RenderSlider::baselinePosition(FontBaseline, bool /*firstLine*/, LineDirectionMode, LinePositionMode linePositionMode) const
50 {
51 ASSERT(linePositionMode == PositionOnContainingLine);
52 // FIXME: Patch this function for writing-mode.
53 return height() + marginTop();
54 }
55
computeIntrinsicLogicalWidths(LayoutUnit & minLogicalWidth,LayoutUnit & maxLogicalWidth) const56 void RenderSlider::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
57 {
58 maxLogicalWidth = defaultTrackLength * style()->effectiveZoom();
59 if (!style()->width().isPercent())
60 minLogicalWidth = maxLogicalWidth;
61 }
62
computePreferredLogicalWidths()63 void RenderSlider::computePreferredLogicalWidths()
64 {
65 m_minPreferredLogicalWidth = 0;
66 m_maxPreferredLogicalWidth = 0;
67 RenderStyle* styleToUse = style();
68
69 if (styleToUse->width().isFixed() && styleToUse->width().value() > 0)
70 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(styleToUse->width().value());
71 else
72 computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
73
74 if (styleToUse->minWidth().isFixed() && styleToUse->minWidth().value() > 0) {
75 m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
76 m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
77 }
78
79 if (styleToUse->maxWidth().isFixed()) {
80 m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
81 m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
82 }
83
84 LayoutUnit toAdd = borderAndPaddingWidth();
85 m_minPreferredLogicalWidth += toAdd;
86 m_maxPreferredLogicalWidth += toAdd;
87
88 clearPreferredLogicalWidthsDirty();
89 }
90
sliderThumbElement() const91 inline SliderThumbElement* RenderSlider::sliderThumbElement() const
92 {
93 return toSliderThumbElement(toElement(node())->userAgentShadowRoot()->getElementById(ShadowElementNames::sliderThumb()));
94 }
95
layout()96 void RenderSlider::layout()
97 {
98 // FIXME: Find a way to cascade appearance.
99 // http://webkit.org/b/62535
100 RenderBox* thumbBox = sliderThumbElement()->renderBox();
101 if (thumbBox && thumbBox->isSliderThumb())
102 static_cast<RenderSliderThumb*>(thumbBox)->updateAppearance(style());
103
104 RenderFlexibleBox::layout();
105 }
106
inDragMode() const107 bool RenderSlider::inDragMode() const
108 {
109 return sliderThumbElement()->active();
110 }
111
112 } // namespace blink
113