void RenderTheme::paintSliderTicks(RenderObject* o, const PaintInfo& paintInfo, const IntRect& rect) { Node* node = o->node(); if (!node || !node->hasTagName(inputTag)) return; HTMLInputElement* input = toHTMLInputElement(node); HTMLDataListElement* dataList = input->dataList(); if (!dataList) return; double min = input->minimum(); double max = input->maximum(); ControlPart part = o->style()->appearance(); // We don't support ticks on alternate sliders like MediaVolumeSliders. if (part != SliderHorizontalPart && part != SliderVerticalPart) return; bool isHorizontal = part == SliderHorizontalPart; IntSize thumbSize; RenderObject* thumbRenderer = input->userAgentShadowRoot()->getElementById(ShadowElementNames::sliderThumb())->renderer(); if (thumbRenderer) { RenderStyle* thumbStyle = thumbRenderer->style(); int thumbWidth = thumbStyle->width().intValue(); int thumbHeight = thumbStyle->height().intValue(); thumbSize.setWidth(isHorizontal ? thumbWidth : thumbHeight); thumbSize.setHeight(isHorizontal ? thumbHeight : thumbWidth); } IntSize tickSize = sliderTickSize(); float zoomFactor = o->style()->effectiveZoom(); FloatRect tickRect; int tickRegionSideMargin = 0; int tickRegionWidth = 0; IntRect trackBounds; RenderObject* trackRenderer = input->userAgentShadowRoot()->getElementById(ShadowElementNames::sliderTrack())->renderer(); // We can ignoring transforms because transform is handled by the graphics context. if (trackRenderer) trackBounds = trackRenderer->absoluteBoundingBoxRectIgnoringTransforms(); IntRect sliderBounds = o->absoluteBoundingBoxRectIgnoringTransforms(); // Make position relative to the transformed ancestor element. trackBounds.setX(trackBounds.x() - sliderBounds.x() + rect.x()); trackBounds.setY(trackBounds.y() - sliderBounds.y() + rect.y()); if (isHorizontal) { tickRect.setWidth(floor(tickSize.width() * zoomFactor)); tickRect.setHeight(floor(tickSize.height() * zoomFactor)); tickRect.setY(floor(rect.y() + rect.height() / 2.0 + sliderTickOffsetFromTrackCenter() * zoomFactor)); tickRegionSideMargin = trackBounds.x() + (thumbSize.width() - tickSize.width() * zoomFactor) / 2.0; tickRegionWidth = trackBounds.width() - thumbSize.width(); } else { tickRect.setWidth(floor(tickSize.height() * zoomFactor)); tickRect.setHeight(floor(tickSize.width() * zoomFactor)); tickRect.setX(floor(rect.x() + rect.width() / 2.0 + sliderTickOffsetFromTrackCenter() * zoomFactor)); tickRegionSideMargin = trackBounds.y() + (thumbSize.width() - tickSize.width() * zoomFactor) / 2.0; tickRegionWidth = trackBounds.height() - thumbSize.width(); } RefPtr<HTMLCollection> options = dataList->options(); GraphicsContextStateSaver stateSaver(*paintInfo.context); paintInfo.context->setFillColor(o->resolveColor(CSSPropertyColor)); for (unsigned i = 0; Node* node = options->item(i); i++) { ASSERT(node->hasTagName(optionTag)); HTMLOptionElement* optionElement = toHTMLOptionElement(node); String value = optionElement->value(); if (!input->isValidValue(value)) continue; double parsedValue = parseToDoubleForNumberType(input->sanitizeValue(value)); double tickFraction = (parsedValue - min) / (max - min); double tickRatio = isHorizontal && o->style()->isLeftToRightDirection() ? tickFraction : 1.0 - tickFraction; double tickPosition = round(tickRegionSideMargin + tickRegionWidth * tickRatio); if (isHorizontal) tickRect.setX(tickPosition); else tickRect.setY(tickPosition); paintInfo.context->fillRect(tickRect); } }