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 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 45 RenderSlider::~RenderSlider() 46 { 47 } 48 49 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 56 void RenderSlider::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const 57 { 58 maxLogicalWidth = defaultTrackLength * style()->effectiveZoom(); 59 if (!style()->width().isPercent()) 60 minLogicalWidth = maxLogicalWidth; 61 } 62 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 91 inline SliderThumbElement* RenderSlider::sliderThumbElement() const 92 { 93 return toSliderThumbElement(toElement(node())->userAgentShadowRoot()->getElementById(ShadowElementNames::sliderThumb())); 94 } 95 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 } 106 107 bool RenderSlider::inDragMode() const 108 { 109 return sliderThumbElement()->active(); 110 } 111 112 } // namespace blink 113