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| 1 /* | |
| 2 * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "core/rendering/RenderScrollbar.h" | |
| 28 | |
| 29 #include "core/css/PseudoStyleRequest.h" | |
| 30 #include "core/frame/FrameView.h" | |
| 31 #include "core/frame/LocalFrame.h" | |
| 32 #include "core/layout/LayoutPart.h" | |
| 33 #include "core/rendering/RenderScrollbarPart.h" | |
| 34 #include "core/rendering/RenderScrollbarTheme.h" | |
| 35 #include "platform/graphics/GraphicsContext.h" | |
| 36 | |
| 37 namespace blink { | |
| 38 | |
| 39 PassRefPtrWillBeRawPtr<Scrollbar> RenderScrollbar::createCustomScrollbar(Scrolla
bleArea* scrollableArea, ScrollbarOrientation orientation, Node* ownerNode, Loca
lFrame* owningFrame) | |
| 40 { | |
| 41 return adoptRefWillBeNoop(new RenderScrollbar(scrollableArea, orientation, o
wnerNode, owningFrame)); | |
| 42 } | |
| 43 | |
| 44 RenderScrollbar::RenderScrollbar(ScrollableArea* scrollableArea, ScrollbarOrient
ation orientation, Node* ownerNode, LocalFrame* owningFrame) | |
| 45 : Scrollbar(scrollableArea, orientation, RegularScrollbar, RenderScrollbarTh
eme::renderScrollbarTheme()) | |
| 46 , m_owner(ownerNode) | |
| 47 , m_owningFrame(owningFrame) | |
| 48 { | |
| 49 ASSERT(ownerNode || owningFrame); | |
| 50 | |
| 51 // FIXME: We need to do this because RenderScrollbar::styleChanged is called
as soon as the scrollbar is created. | |
| 52 | |
| 53 // Update the scrollbar size. | |
| 54 IntRect rect(0, 0, 0, 0); | |
| 55 updateScrollbarPart(ScrollbarBGPart); | |
| 56 if (RenderScrollbarPart* part = m_parts.get(ScrollbarBGPart)) { | |
| 57 part->layout(); | |
| 58 rect.setSize(flooredIntSize(part->size())); | |
| 59 } else if (this->orientation() == HorizontalScrollbar) { | |
| 60 rect.setWidth(this->width()); | |
| 61 } else { | |
| 62 rect.setHeight(this->height()); | |
| 63 } | |
| 64 | |
| 65 setFrameRect(rect); | |
| 66 | |
| 67 } | |
| 68 | |
| 69 RenderScrollbar::~RenderScrollbar() | |
| 70 { | |
| 71 if (m_parts.isEmpty()) | |
| 72 return; | |
| 73 | |
| 74 // When a scrollbar is detached from its parent (causing all parts removal)
and | |
| 75 // ready to be destroyed, its destruction can be delayed because of RefPtr | |
| 76 // maintained in other classes such as EventHandler (m_lastScrollbarUnderMou
se). | |
| 77 // Meanwhile, we can have a call to updateScrollbarPart which recreates the | |
| 78 // scrollbar part. So, we need to destroy these parts since we don't want th
em | |
| 79 // to call on a destroyed scrollbar. See webkit bug 68009. | |
| 80 updateScrollbarParts(true); | |
| 81 } | |
| 82 | |
| 83 void RenderScrollbar::trace(Visitor* visitor) | |
| 84 { | |
| 85 #if ENABLE(OILPAN) | |
| 86 visitor->trace(m_owner); | |
| 87 visitor->trace(m_owningFrame); | |
| 88 #endif | |
| 89 Scrollbar::trace(visitor); | |
| 90 } | |
| 91 | |
| 92 RenderBox* RenderScrollbar::owningRenderer() const | |
| 93 { | |
| 94 if (m_owningFrame) { | |
| 95 RenderBox* currentRenderer = m_owningFrame->ownerRenderer(); | |
| 96 return currentRenderer; | |
| 97 } | |
| 98 return m_owner && m_owner->renderer() ? m_owner->renderer()->enclosingBox()
: 0; | |
| 99 } | |
| 100 | |
| 101 void RenderScrollbar::setParent(Widget* parent) | |
| 102 { | |
| 103 Scrollbar::setParent(parent); | |
| 104 if (!parent) { | |
| 105 // Destroy all of the scrollbar's RenderBoxes. | |
| 106 updateScrollbarParts(true); | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 void RenderScrollbar::setEnabled(bool e) | |
| 111 { | |
| 112 bool wasEnabled = enabled(); | |
| 113 Scrollbar::setEnabled(e); | |
| 114 if (wasEnabled != e) | |
| 115 updateScrollbarParts(); | |
| 116 } | |
| 117 | |
| 118 void RenderScrollbar::styleChanged() | |
| 119 { | |
| 120 updateScrollbarParts(); | |
| 121 } | |
| 122 | |
| 123 void RenderScrollbar::setHoveredPart(ScrollbarPart part) | |
| 124 { | |
| 125 if (part == m_hoveredPart) | |
| 126 return; | |
| 127 | |
| 128 ScrollbarPart oldPart = m_hoveredPart; | |
| 129 m_hoveredPart = part; | |
| 130 | |
| 131 updateScrollbarPart(oldPart); | |
| 132 updateScrollbarPart(m_hoveredPart); | |
| 133 | |
| 134 updateScrollbarPart(ScrollbarBGPart); | |
| 135 updateScrollbarPart(TrackBGPart); | |
| 136 } | |
| 137 | |
| 138 void RenderScrollbar::setPressedPart(ScrollbarPart part) | |
| 139 { | |
| 140 ScrollbarPart oldPart = m_pressedPart; | |
| 141 Scrollbar::setPressedPart(part); | |
| 142 | |
| 143 updateScrollbarPart(oldPart); | |
| 144 updateScrollbarPart(part); | |
| 145 | |
| 146 updateScrollbarPart(ScrollbarBGPart); | |
| 147 updateScrollbarPart(TrackBGPart); | |
| 148 } | |
| 149 | |
| 150 PassRefPtr<LayoutStyle> RenderScrollbar::getScrollbarPseudoStyle(ScrollbarPart p
artType, PseudoId pseudoId) | |
| 151 { | |
| 152 if (!owningRenderer()) | |
| 153 return nullptr; | |
| 154 | |
| 155 RefPtr<LayoutStyle> result = owningRenderer()->getUncachedPseudoStyle(Pseudo
StyleRequest(pseudoId, this, partType), owningRenderer()->style()); | |
| 156 // Scrollbars for root frames should always have background color | |
| 157 // unless explicitly specified as transparent. So we force it. | |
| 158 // This is because WebKit assumes scrollbar to be always painted and missing
background | |
| 159 // causes visual artifact like non-paint invalidated dirty region. | |
| 160 if (result && m_owningFrame && m_owningFrame->view() && !m_owningFrame->view
()->isTransparent() && !result->hasBackground()) | |
| 161 result->setBackgroundColor(StyleColor(Color::white)); | |
| 162 | |
| 163 return result; | |
| 164 } | |
| 165 | |
| 166 void RenderScrollbar::updateScrollbarParts(bool destroy) | |
| 167 { | |
| 168 updateScrollbarPart(ScrollbarBGPart, destroy); | |
| 169 updateScrollbarPart(BackButtonStartPart, destroy); | |
| 170 updateScrollbarPart(ForwardButtonStartPart, destroy); | |
| 171 updateScrollbarPart(BackTrackPart, destroy); | |
| 172 updateScrollbarPart(ThumbPart, destroy); | |
| 173 updateScrollbarPart(ForwardTrackPart, destroy); | |
| 174 updateScrollbarPart(BackButtonEndPart, destroy); | |
| 175 updateScrollbarPart(ForwardButtonEndPart, destroy); | |
| 176 updateScrollbarPart(TrackBGPart, destroy); | |
| 177 | |
| 178 if (destroy) | |
| 179 return; | |
| 180 | |
| 181 // See if the scrollbar's thickness changed. If so, we need to mark our own
ing object as needing a layout. | |
| 182 bool isHorizontal = orientation() == HorizontalScrollbar; | |
| 183 int oldThickness = isHorizontal ? height() : width(); | |
| 184 int newThickness = 0; | |
| 185 RenderScrollbarPart* part = m_parts.get(ScrollbarBGPart); | |
| 186 if (part) { | |
| 187 part->layout(); | |
| 188 newThickness = isHorizontal ? part->size().height() : part->size().width
(); | |
| 189 } | |
| 190 | |
| 191 if (newThickness != oldThickness) { | |
| 192 setFrameRect(IntRect(location(), IntSize(isHorizontal ? width() : newThi
ckness, isHorizontal ? newThickness : height()))); | |
| 193 if (RenderBox* box = owningRenderer()) { | |
| 194 if (box->isRenderBlock()) | |
| 195 toRenderBlock(box)->notifyScrollbarThicknessChanged(); | |
| 196 box->setChildNeedsLayout(); | |
| 197 } | |
| 198 } | |
| 199 } | |
| 200 | |
| 201 static PseudoId pseudoForScrollbarPart(ScrollbarPart part) | |
| 202 { | |
| 203 switch (part) { | |
| 204 case BackButtonStartPart: | |
| 205 case ForwardButtonStartPart: | |
| 206 case BackButtonEndPart: | |
| 207 case ForwardButtonEndPart: | |
| 208 return SCROLLBAR_BUTTON; | |
| 209 case BackTrackPart: | |
| 210 case ForwardTrackPart: | |
| 211 return SCROLLBAR_TRACK_PIECE; | |
| 212 case ThumbPart: | |
| 213 return SCROLLBAR_THUMB; | |
| 214 case TrackBGPart: | |
| 215 return SCROLLBAR_TRACK; | |
| 216 case ScrollbarBGPart: | |
| 217 return SCROLLBAR; | |
| 218 case NoPart: | |
| 219 case AllParts: | |
| 220 break; | |
| 221 } | |
| 222 ASSERT_NOT_REACHED(); | |
| 223 return SCROLLBAR; | |
| 224 } | |
| 225 | |
| 226 void RenderScrollbar::updateScrollbarPart(ScrollbarPart partType, bool destroy) | |
| 227 { | |
| 228 if (partType == NoPart) | |
| 229 return; | |
| 230 | |
| 231 RefPtr<LayoutStyle> partStyle = !destroy ? getScrollbarPseudoStyle(partType,
pseudoForScrollbarPart(partType)) : PassRefPtr<LayoutStyle>(nullptr); | |
| 232 | |
| 233 bool needRenderer = !destroy && partStyle && partStyle->display() != NONE; | |
| 234 | |
| 235 if (needRenderer && partStyle->display() != BLOCK) { | |
| 236 // See if we are a button that should not be visible according to OS set
tings. | |
| 237 ScrollbarButtonsPlacement buttonsPlacement = theme()->buttonsPlacement()
; | |
| 238 switch (partType) { | |
| 239 case BackButtonStartPart: | |
| 240 needRenderer = (buttonsPlacement == ScrollbarButtonsSingle || bu
ttonsPlacement == ScrollbarButtonsDoubleStart || | |
| 241 buttonsPlacement == ScrollbarButtonsDoubleBoth); | |
| 242 break; | |
| 243 case ForwardButtonStartPart: | |
| 244 needRenderer = (buttonsPlacement == ScrollbarButtonsDoubleStart
|| buttonsPlacement == ScrollbarButtonsDoubleBoth); | |
| 245 break; | |
| 246 case BackButtonEndPart: | |
| 247 needRenderer = (buttonsPlacement == ScrollbarButtonsDoubleEnd ||
buttonsPlacement == ScrollbarButtonsDoubleBoth); | |
| 248 break; | |
| 249 case ForwardButtonEndPart: | |
| 250 needRenderer = (buttonsPlacement == ScrollbarButtonsSingle || bu
ttonsPlacement == ScrollbarButtonsDoubleEnd || | |
| 251 buttonsPlacement == ScrollbarButtonsDoubleBoth); | |
| 252 break; | |
| 253 default: | |
| 254 break; | |
| 255 } | |
| 256 } | |
| 257 | |
| 258 RenderScrollbarPart* partRenderer = m_parts.get(partType); | |
| 259 if (!partRenderer && needRenderer) { | |
| 260 partRenderer = RenderScrollbarPart::createAnonymous(&owningRenderer()->d
ocument(), this, partType); | |
| 261 m_parts.set(partType, partRenderer); | |
| 262 } else if (partRenderer && !needRenderer) { | |
| 263 m_parts.remove(partType); | |
| 264 partRenderer->destroy(); | |
| 265 partRenderer = 0; | |
| 266 } | |
| 267 | |
| 268 if (partRenderer) | |
| 269 partRenderer->setStyle(partStyle.release()); | |
| 270 } | |
| 271 | |
| 272 IntRect RenderScrollbar::buttonRect(ScrollbarPart partType) | |
| 273 { | |
| 274 RenderScrollbarPart* partRenderer = m_parts.get(partType); | |
| 275 if (!partRenderer) | |
| 276 return IntRect(); | |
| 277 | |
| 278 partRenderer->layout(); | |
| 279 | |
| 280 bool isHorizontal = orientation() == HorizontalScrollbar; | |
| 281 if (partType == BackButtonStartPart) | |
| 282 return IntRect(location(), IntSize(isHorizontal ? partRenderer->pixelSna
ppedWidth() : width(), isHorizontal ? height() : partRenderer->pixelSnappedHeigh
t())); | |
| 283 if (partType == ForwardButtonEndPart) | |
| 284 return IntRect(isHorizontal ? x() + width() - partRenderer->pixelSnapped
Width() : x(), | |
| 285 isHorizontal ? y() : y() + height() - partRenderer->pixel
SnappedHeight(), | |
| 286 isHorizontal ? partRenderer->pixelSnappedWidth() : width(
), | |
| 287 isHorizontal ? height() : partRenderer->pixelSnappedHeigh
t()); | |
| 288 | |
| 289 if (partType == ForwardButtonStartPart) { | |
| 290 IntRect previousButton = buttonRect(BackButtonStartPart); | |
| 291 return IntRect(isHorizontal ? x() + previousButton.width() : x(), | |
| 292 isHorizontal ? y() : y() + previousButton.height(), | |
| 293 isHorizontal ? partRenderer->pixelSnappedWidth() : width(
), | |
| 294 isHorizontal ? height() : partRenderer->pixelSnappedHeigh
t()); | |
| 295 } | |
| 296 | |
| 297 IntRect followingButton = buttonRect(ForwardButtonEndPart); | |
| 298 return IntRect(isHorizontal ? x() + width() - followingButton.width() - part
Renderer->pixelSnappedWidth() : x(), | |
| 299 isHorizontal ? y() : y() + height() - followingButton.height(
) - partRenderer->pixelSnappedHeight(), | |
| 300 isHorizontal ? partRenderer->pixelSnappedWidth() : width(), | |
| 301 isHorizontal ? height() : partRenderer->pixelSnappedHeight())
; | |
| 302 } | |
| 303 | |
| 304 IntRect RenderScrollbar::trackRect(int startLength, int endLength) | |
| 305 { | |
| 306 RenderScrollbarPart* part = m_parts.get(TrackBGPart); | |
| 307 if (part) | |
| 308 part->layout(); | |
| 309 | |
| 310 if (orientation() == HorizontalScrollbar) { | |
| 311 int marginLeft = part ? static_cast<int>(part->marginLeft()) : 0; | |
| 312 int marginRight = part ? static_cast<int>(part->marginRight()) : 0; | |
| 313 startLength += marginLeft; | |
| 314 endLength += marginRight; | |
| 315 int totalLength = startLength + endLength; | |
| 316 return IntRect(x() + startLength, y(), width() - totalLength, height()); | |
| 317 } | |
| 318 | |
| 319 int marginTop = part ? static_cast<int>(part->marginTop()) : 0; | |
| 320 int marginBottom = part ? static_cast<int>(part->marginBottom()) : 0; | |
| 321 startLength += marginTop; | |
| 322 endLength += marginBottom; | |
| 323 int totalLength = startLength + endLength; | |
| 324 | |
| 325 return IntRect(x(), y() + startLength, width(), height() - totalLength); | |
| 326 } | |
| 327 | |
| 328 IntRect RenderScrollbar::trackPieceRectWithMargins(ScrollbarPart partType, const
IntRect& oldRect) | |
| 329 { | |
| 330 RenderScrollbarPart* partRenderer = m_parts.get(partType); | |
| 331 if (!partRenderer) | |
| 332 return oldRect; | |
| 333 | |
| 334 partRenderer->layout(); | |
| 335 | |
| 336 IntRect rect = oldRect; | |
| 337 if (orientation() == HorizontalScrollbar) { | |
| 338 rect.setX(rect.x() + partRenderer->marginLeft()); | |
| 339 rect.setWidth(rect.width() - partRenderer->marginWidth()); | |
| 340 } else { | |
| 341 rect.setY(rect.y() + partRenderer->marginTop()); | |
| 342 rect.setHeight(rect.height() - partRenderer->marginHeight()); | |
| 343 } | |
| 344 return rect; | |
| 345 } | |
| 346 | |
| 347 int RenderScrollbar::minimumThumbLength() | |
| 348 { | |
| 349 RenderScrollbarPart* partRenderer = m_parts.get(ThumbPart); | |
| 350 if (!partRenderer) | |
| 351 return 0; | |
| 352 partRenderer->layout(); | |
| 353 return orientation() == HorizontalScrollbar ? partRenderer->size().width() :
partRenderer->size().height(); | |
| 354 } | |
| 355 | |
| 356 } | |
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Chromium Code Reviews
Issue 951453003:
Rename rendering/RenderScrollbar* to layout/LayoutScrollbar* (Closed)
Base URL: svn://svn.chromium.org/blink/trunk