void RenderSlider::layout() { ASSERT(needsLayout()); SliderThumbElement* thumbElement = shadowSliderThumb(); RenderBox* thumb = thumbElement ? toRenderBox(thumbElement->renderer()) : 0; IntSize baseSize(borderAndPaddingWidth(), borderAndPaddingHeight()); if (thumb) { // Allow the theme to set the size of the thumb. if (thumb->style()->hasAppearance()) { // FIXME: This should pass the style, not the renderer, to the theme. theme()->adjustSliderThumbSize(thumb); } baseSize.expand(thumb->style()->width().calcMinValue(0), thumb->style()->height().calcMinValue(0)); } LayoutRepainter repainter(*this, checkForRepaintDuringLayout()); IntSize oldSize = size(); setSize(baseSize); computeLogicalWidth(); computeLogicalHeight(); updateLayerTransform(); if (thumb) { if (oldSize != size()) thumb->setChildNeedsLayout(true, false); LayoutStateMaintainer statePusher(view(), this, IntSize(x(), y()), style()->isFlippedBlocksWritingMode()); IntRect oldThumbRect = thumb->frameRect(); thumb->layoutIfNeeded(); IntRect rect = thumbRect(); thumb->setFrameRect(rect); if (thumb->checkForRepaintDuringLayout()) thumb->repaintDuringLayoutIfMoved(oldThumbRect); statePusher.pop(); addOverflowFromChild(thumb); } repainter.repaintAfterLayout(); setNeedsLayout(false); }
IntRect RenderSlider::thumbRect() { SliderThumbElement* thumbElement = shadowSliderThumb(); if (!thumbElement) return IntRect(); IntRect thumbRect; RenderBox* thumb = toRenderBox(thumbElement->renderer()); thumbRect.setWidth(thumb->style()->width().calcMinValue(contentWidth())); thumbRect.setHeight(thumb->style()->height().calcMinValue(contentHeight())); double fraction = sliderPosition(static_cast<HTMLInputElement*>(node())); IntRect contentRect = contentBoxRect(); if (style()->appearance() == SliderVerticalPart || style()->appearance() == MediaVolumeSliderPart) { thumbRect.setX(contentRect.x() + (contentRect.width() - thumbRect.width()) / 2); thumbRect.setY(contentRect.y() + static_cast<int>(nextafter((contentRect.height() - thumbRect.height()) + 1, 0) * (1 - fraction))); } else { thumbRect.setX(contentRect.x() + static_cast<int>(nextafter((contentRect.width() - thumbRect.width()) + 1, 0) * fraction)); thumbRect.setY(contentRect.y() + (contentRect.height() - thumbRect.height()) / 2); } return thumbRect; }