| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "core/frame/VisualViewport.h" |
| |
| #include "core/dom/DOMNodeIds.h" |
| #include "core/frame/FrameHost.h" |
| #include "core/frame/FrameView.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/frame/PageScaleConstraints.h" |
| #include "core/frame/PageScaleConstraintsSet.h" |
| #include "core/frame/RootFrameViewport.h" |
| #include "core/frame/Settings.h" |
| #include "core/inspector/InspectorInstrumentation.h" |
| #include "core/layout/TextAutosizer.h" |
| #include "core/layout/compositing/PaintLayerCompositor.h" |
| #include "core/loader/FrameLoaderClient.h" |
| #include "core/page/ChromeClient.h" |
| #include "core/page/Page.h" |
| #include "core/page/scrolling/ScrollingCoordinator.h" |
| #include "platform/Histogram.h" |
| #include "platform/geometry/DoubleRect.h" |
| #include "platform/geometry/FloatSize.h" |
| #include "platform/graphics/CompositorMutableProperties.h" |
| #include "platform/graphics/GraphicsLayer.h" |
| #include "platform/scroll/Scrollbar.h" |
| #include "platform/scroll/ScrollbarThemeOverlay.h" |
| #include "platform/tracing/TraceEvent.h" |
| #include "public/platform/WebCompositorSupport.h" |
| #include "public/platform/WebScrollbar.h" |
| #include "public/platform/WebScrollbarLayer.h" |
| #include <memory> |
| |
| namespace blink { |
| |
| VisualViewport::VisualViewport(FrameHost& owner) |
| : m_frameHost(&owner), |
| m_scale(1), |
| m_topControlsAdjustment(0), |
| m_maxPageScale(-1), |
| m_trackPinchZoomStatsForPage(false) { |
| reset(); |
| } |
| |
| VisualViewport::~VisualViewport() { |
| sendUMAMetrics(); |
| } |
| |
| DEFINE_TRACE(VisualViewport) { |
| visitor->trace(m_frameHost); |
| ScrollableArea::trace(visitor); |
| } |
| |
| void VisualViewport::updateStyleAndLayoutIgnorePendingStylesheets() { |
| if (!mainFrame()) |
| return; |
| |
| if (Document* document = mainFrame()->document()) |
| document->updateStyleAndLayoutIgnorePendingStylesheets(); |
| } |
| |
| void VisualViewport::enqueueScrollEvent() { |
| if (!RuntimeEnabledFeatures::visualViewportAPIEnabled()) |
| return; |
| |
| if (Document* document = mainFrame()->document()) |
| document->enqueueVisualViewportScrollEvent(); |
| } |
| |
| void VisualViewport::enqueueResizeEvent() { |
| if (!RuntimeEnabledFeatures::visualViewportAPIEnabled()) |
| return; |
| |
| if (Document* document = mainFrame()->document()) |
| document->enqueueVisualViewportResizeEvent(); |
| } |
| |
| void VisualViewport::setSize(const IntSize& size) { |
| if (m_size == size) |
| return; |
| |
| TRACE_EVENT2("blink", "VisualViewport::setSize", "width", size.width(), |
| "height", size.height()); |
| bool widthDidChange = size.width() != m_size.width(); |
| m_size = size; |
| |
| if (m_innerViewportContainerLayer) { |
| m_innerViewportContainerLayer->setSize(FloatSize(m_size)); |
| |
| // Need to re-compute sizes for the overlay scrollbars. |
| initializeScrollbars(); |
| } |
| |
| if (!mainFrame()) |
| return; |
| |
| enqueueResizeEvent(); |
| |
| bool autosizerNeedsUpdating = |
| widthDidChange && mainFrame()->settings() && |
| mainFrame()->settings()->textAutosizingEnabled(); |
| |
| if (autosizerNeedsUpdating) { |
| // This needs to happen after setting the m_size member since it'll be read |
| // in the update call. |
| if (TextAutosizer* textAutosizer = mainFrame()->document()->textAutosizer()) |
| textAutosizer->updatePageInfoInAllFrames(); |
| } |
| } |
| |
| void VisualViewport::reset() { |
| setScaleAndLocation(1, FloatPoint()); |
| } |
| |
| void VisualViewport::mainFrameDidChangeSize() { |
| TRACE_EVENT0("blink", "VisualViewport::mainFrameDidChangeSize"); |
| |
| // In unit tests we may not have initialized the layer tree. |
| if (m_innerViewportScrollLayer) |
| m_innerViewportScrollLayer->setSize(FloatSize(contentsSize())); |
| |
| clampToBoundaries(); |
| } |
| |
| FloatSize VisualViewport::visibleSize() const { |
| FloatSize scaledSize(m_size); |
| scaledSize.expand(0, m_topControlsAdjustment); |
| scaledSize.scale(1 / m_scale); |
| return scaledSize; |
| } |
| |
| FloatRect VisualViewport::visibleRect() const { |
| return FloatRect(location(), visibleSize()); |
| } |
| |
| FloatRect VisualViewport::visibleRectInDocument() const { |
| if (!mainFrame() || !mainFrame()->view()) |
| return FloatRect(); |
| |
| FloatPoint viewLocation = FloatPoint( |
| mainFrame()->view()->getScrollableArea()->scrollPositionDouble()); |
| return FloatRect(viewLocation, visibleSize()); |
| } |
| |
| FloatRect VisualViewport::mainViewToViewportCSSPixels( |
| const FloatRect& rect) const { |
| // Note, this is in CSS Pixels so we don't apply scale. |
| FloatRect rectInViewport = rect; |
| rectInViewport.moveBy(-location()); |
| return rectInViewport; |
| } |
| |
| FloatPoint VisualViewport::viewportCSSPixelsToRootFrame( |
| const FloatPoint& point) const { |
| // Note, this is in CSS Pixels so we don't apply scale. |
| FloatPoint pointInRootFrame = point; |
| pointInRootFrame.moveBy(location()); |
| return pointInRootFrame; |
| } |
| |
| void VisualViewport::setLocation(const FloatPoint& newLocation) { |
| setScaleAndLocation(m_scale, newLocation); |
| } |
| |
| void VisualViewport::move(const FloatPoint& delta) { |
| setLocation(m_offset + delta); |
| } |
| |
| void VisualViewport::move(const FloatSize& delta) { |
| setLocation(m_offset + delta); |
| } |
| |
| void VisualViewport::setScale(float scale) { |
| setScaleAndLocation(scale, m_offset); |
| } |
| |
| double VisualViewport::scrollLeft() { |
| if (!mainFrame()) |
| return 0; |
| |
| updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| return adjustScrollForAbsoluteZoom(visibleRect().x(), |
| mainFrame()->pageZoomFactor()); |
| } |
| |
| double VisualViewport::scrollTop() { |
| if (!mainFrame()) |
| return 0; |
| |
| updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| return adjustScrollForAbsoluteZoom(visibleRect().y(), |
| mainFrame()->pageZoomFactor()); |
| } |
| |
| double VisualViewport::clientWidth() { |
| if (!mainFrame()) |
| return 0; |
| |
| updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| double width = adjustScrollForAbsoluteZoom(visibleSize().width(), |
| mainFrame()->pageZoomFactor()); |
| return width - mainFrame()->view()->verticalScrollbarWidth() / m_scale; |
| } |
| |
| double VisualViewport::clientHeight() { |
| if (!mainFrame()) |
| return 0; |
| |
| updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| double height = adjustScrollForAbsoluteZoom(visibleSize().height(), |
| mainFrame()->pageZoomFactor()); |
| return height - mainFrame()->view()->horizontalScrollbarHeight() / m_scale; |
| } |
| |
| double VisualViewport::pageScale() { |
| updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| return m_scale; |
| } |
| |
| void VisualViewport::setScaleAndLocation(float scale, |
| const FloatPoint& location) { |
| if (didSetScaleOrLocation(scale, location)) |
| notifyRootFrameViewport(); |
| } |
| |
| bool VisualViewport::didSetScaleOrLocation(float scale, |
| const FloatPoint& location) { |
| if (!mainFrame()) |
| return false; |
| |
| bool valuesChanged = false; |
| |
| if (scale != m_scale) { |
| m_scale = scale; |
| valuesChanged = true; |
| frameHost().chromeClient().pageScaleFactorChanged(); |
| enqueueResizeEvent(); |
| } |
| |
| FloatPoint clampedOffset(clampOffsetToBoundaries(location)); |
| |
| if (clampedOffset != m_offset) { |
| m_offset = clampedOffset; |
| scrollAnimator().setCurrentPosition(m_offset); |
| |
| // SVG runs with accelerated compositing disabled so no |
| // ScrollingCoordinator. |
| if (ScrollingCoordinator* coordinator = |
| frameHost().page().scrollingCoordinator()) |
| coordinator->scrollableAreaScrollLayerDidChange(this); |
| |
| if (!frameHost().settings().inertVisualViewport()) { |
| if (Document* document = mainFrame()->document()) |
| document->enqueueScrollEventForNode(document); |
| } |
| |
| enqueueScrollEvent(); |
| |
| mainFrame()->view()->didChangeScrollOffset(); |
| valuesChanged = true; |
| } |
| |
| if (!valuesChanged) |
| return false; |
| |
| InspectorInstrumentation::didUpdateLayout(mainFrame()); |
| mainFrame()->loader().saveScrollState(); |
| |
| clampToBoundaries(); |
| |
| return true; |
| } |
| |
| bool VisualViewport::magnifyScaleAroundAnchor(float magnifyDelta, |
| const FloatPoint& anchor) { |
| const float oldPageScale = scale(); |
| const float newPageScale = |
| frameHost().chromeClient().clampPageScaleFactorToLimits(magnifyDelta * |
| oldPageScale); |
| if (newPageScale == oldPageScale) |
| return false; |
| if (!mainFrame() || !mainFrame()->view()) |
| return false; |
| |
| // Keep the center-of-pinch anchor in a stable position over the course |
| // of the magnify. |
| FloatPoint anchorAtOldScale = anchor.scaledBy(1.f / oldPageScale); |
| FloatPoint anchorAtNewScale = anchor.scaledBy(1.f / newPageScale); |
| FloatSize anchorDelta = anchorAtOldScale - anchorAtNewScale; |
| |
| // First try to use the anchor's delta to scroll the FrameView. |
| FloatSize anchorDeltaUnusedByScroll = anchorDelta; |
| |
| // Manually bubble any remaining anchor delta up to the visual viewport. |
| FloatPoint newLocation(location() + anchorDeltaUnusedByScroll); |
| setScaleAndLocation(newPageScale, newLocation); |
| return true; |
| } |
| |
| // Modifies the top of the graphics layer tree to add layers needed to support |
| // the inner/outer viewport fixed-position model for pinch zoom. When finished, |
| // the tree will look like this (with * denoting added layers): |
| // |
| // *rootTransformLayer |
| // +- *innerViewportContainerLayer (fixed pos container) |
| // +- *overscrollElasticityLayer |
| // | +- *pageScaleLayer |
| // | +- *innerViewportScrollLayer |
| // | +-- overflowControlsHostLayer (root layer) |
| // | | [ owned by PaintLayerCompositor ] |
| // | +-- outerViewportContainerLayer (fixed pos container) |
| // | | [frame container layer in PaintLayerCompositor] |
| // | | +-- outerViewportScrollLayer |
| // | | | [frame scroll layer in PaintLayerCompositor] |
| // | | +-- content layers ... |
| // +- *PageOverlay for InspectorOverlay |
| // +- *PageOverlay for ColorOverlay |
| // +- horizontalScrollbarLayer [ owned by PaintLayerCompositor ] |
| // +- verticalScrollbarLayer [ owned by PaintLayerCompositor ] |
| // +- scroll corner (non-overlay only) [ owned by PaintLayerCompositor ] |
| // |
| void VisualViewport::attachToLayerTree(GraphicsLayer* currentLayerTreeRoot) { |
| TRACE_EVENT1("blink", "VisualViewport::attachToLayerTree", |
| "currentLayerTreeRoot", (bool)currentLayerTreeRoot); |
| if (!currentLayerTreeRoot) { |
| if (m_innerViewportScrollLayer) |
| m_innerViewportScrollLayer->removeAllChildren(); |
| return; |
| } |
| |
| if (currentLayerTreeRoot->parent() && |
| currentLayerTreeRoot->parent() == m_innerViewportScrollLayer.get()) |
| return; |
| |
| if (!m_innerViewportScrollLayer) { |
| ASSERT(!m_overlayScrollbarHorizontal && !m_overlayScrollbarVertical && |
| !m_overscrollElasticityLayer && !m_pageScaleLayer && |
| !m_innerViewportContainerLayer); |
| |
| // FIXME: The root transform layer should only be created on demand. |
| m_rootTransformLayer = GraphicsLayer::create(this); |
| m_innerViewportContainerLayer = GraphicsLayer::create(this); |
| m_overscrollElasticityLayer = GraphicsLayer::create(this); |
| m_pageScaleLayer = GraphicsLayer::create(this); |
| m_innerViewportScrollLayer = GraphicsLayer::create(this); |
| m_overlayScrollbarHorizontal = GraphicsLayer::create(this); |
| m_overlayScrollbarVertical = GraphicsLayer::create(this); |
| |
| ScrollingCoordinator* coordinator = |
| frameHost().page().scrollingCoordinator(); |
| ASSERT(coordinator); |
| coordinator->setLayerIsContainerForFixedPositionLayers( |
| m_innerViewportScrollLayer.get(), true); |
| |
| // Set masks to bounds so the compositor doesn't clobber a manually |
| // set inner viewport container layer size. |
| m_innerViewportContainerLayer->setMasksToBounds( |
| frameHost().settings().mainFrameClipsContent()); |
| m_innerViewportContainerLayer->setSize(FloatSize(m_size)); |
| |
| m_innerViewportScrollLayer->platformLayer()->setScrollClipLayer( |
| m_innerViewportContainerLayer->platformLayer()); |
| m_innerViewportScrollLayer->platformLayer()->setUserScrollable(true, true); |
| if (mainFrame()) { |
| if (Document* document = mainFrame()->document()) |
| m_innerViewportScrollLayer->setElementId(createCompositorElementId( |
| DOMNodeIds::idForNode(document), CompositorSubElementId::Scroll)); |
| } |
| |
| m_rootTransformLayer->addChild(m_innerViewportContainerLayer.get()); |
| m_innerViewportContainerLayer->addChild(m_overscrollElasticityLayer.get()); |
| m_overscrollElasticityLayer->addChild(m_pageScaleLayer.get()); |
| m_pageScaleLayer->addChild(m_innerViewportScrollLayer.get()); |
| |
| // Ensure this class is set as the scroll layer's ScrollableArea. |
| coordinator->scrollableAreaScrollLayerDidChange(this); |
| |
| initializeScrollbars(); |
| } |
| |
| m_innerViewportScrollLayer->removeAllChildren(); |
| m_innerViewportScrollLayer->addChild(currentLayerTreeRoot); |
| } |
| |
| void VisualViewport::initializeScrollbars() { |
| // Do nothing if not attached to layer tree yet - will initialize upon attach. |
| if (!m_innerViewportContainerLayer) |
| return; |
| |
| if (visualViewportSuppliesScrollbars() && |
| !frameHost().settings().hideScrollbars()) { |
| if (!m_overlayScrollbarHorizontal->parent()) |
| m_innerViewportContainerLayer->addChild( |
| m_overlayScrollbarHorizontal.get()); |
| if (!m_overlayScrollbarVertical->parent()) |
| m_innerViewportContainerLayer->addChild(m_overlayScrollbarVertical.get()); |
| } else { |
| m_overlayScrollbarHorizontal->removeFromParent(); |
| m_overlayScrollbarVertical->removeFromParent(); |
| } |
| |
| setupScrollbar(WebScrollbar::Horizontal); |
| setupScrollbar(WebScrollbar::Vertical); |
| } |
| |
| void VisualViewport::setupScrollbar(WebScrollbar::Orientation orientation) { |
| bool isHorizontal = orientation == WebScrollbar::Horizontal; |
| GraphicsLayer* scrollbarGraphicsLayer = |
| isHorizontal ? m_overlayScrollbarHorizontal.get() |
| : m_overlayScrollbarVertical.get(); |
| std::unique_ptr<WebScrollbarLayer>& webScrollbarLayer = |
| isHorizontal ? m_webOverlayScrollbarHorizontal |
| : m_webOverlayScrollbarVertical; |
| |
| ScrollbarThemeOverlay& theme = ScrollbarThemeOverlay::mobileTheme(); |
| int thumbThickness = theme.thumbThickness(); |
| int scrollbarThickness = theme.scrollbarThickness(RegularScrollbar); |
| int scrollbarMargin = theme.scrollbarMargin(); |
| |
| if (!webScrollbarLayer) { |
| ScrollingCoordinator* coordinator = |
| frameHost().page().scrollingCoordinator(); |
| ASSERT(coordinator); |
| ScrollbarOrientation webcoreOrientation = |
| isHorizontal ? HorizontalScrollbar : VerticalScrollbar; |
| webScrollbarLayer = coordinator->createSolidColorScrollbarLayer( |
| webcoreOrientation, thumbThickness, scrollbarMargin, false); |
| |
| // The compositor will control the scrollbar's visibility. Set to invisible |
| // by default so scrollbars don't show up in layout tests. |
| webScrollbarLayer->layer()->setOpacity(0); |
| scrollbarGraphicsLayer->setContentsToPlatformLayer( |
| webScrollbarLayer->layer()); |
| scrollbarGraphicsLayer->setDrawsContent(false); |
| } |
| |
| int xPosition = isHorizontal ? 0 |
| : m_innerViewportContainerLayer->size().width() - |
| scrollbarThickness; |
| int yPosition = |
| isHorizontal |
| ? m_innerViewportContainerLayer->size().height() - scrollbarThickness |
| : 0; |
| int width = |
| isHorizontal |
| ? m_innerViewportContainerLayer->size().width() - scrollbarThickness |
| : scrollbarThickness; |
| int height = isHorizontal ? scrollbarThickness |
| : m_innerViewportContainerLayer->size().height() - |
| scrollbarThickness; |
| |
| // Use the GraphicsLayer to position the scrollbars. |
| scrollbarGraphicsLayer->setPosition(IntPoint(xPosition, yPosition)); |
| scrollbarGraphicsLayer->setSize(FloatSize(width, height)); |
| scrollbarGraphicsLayer->setContentsRect(IntRect(0, 0, width, height)); |
| } |
| |
| void VisualViewport::setScrollLayerOnScrollbars(WebLayer* scrollLayer) const { |
| // TODO(bokan): This is currently done while registering viewport layers |
| // with the compositor but could it actually be done earlier, like in |
| // setupScrollbars? Then we wouldn't need this method. |
| m_webOverlayScrollbarHorizontal->setScrollLayer(scrollLayer); |
| m_webOverlayScrollbarVertical->setScrollLayer(scrollLayer); |
| } |
| |
| bool VisualViewport::visualViewportSuppliesScrollbars() const { |
| return frameHost().settings().viewportEnabled(); |
| } |
| |
| bool VisualViewport::scrollAnimatorEnabled() const { |
| return frameHost().settings().scrollAnimatorEnabled(); |
| } |
| |
| HostWindow* VisualViewport::getHostWindow() const { |
| return &frameHost().chromeClient(); |
| } |
| |
| DoubleRect VisualViewport::visibleContentRectDouble( |
| IncludeScrollbarsInRect) const { |
| return visibleRect(); |
| } |
| |
| IntRect VisualViewport::visibleContentRect( |
| IncludeScrollbarsInRect scrollbarInclusion) const { |
| return enclosingIntRect(visibleContentRectDouble(scrollbarInclusion)); |
| } |
| |
| bool VisualViewport::shouldUseIntegerScrollOffset() const { |
| LocalFrame* frame = mainFrame(); |
| if (frame && frame->settings() && |
| !frame->settings()->preferCompositingToLCDTextEnabled()) |
| return true; |
| |
| return ScrollableArea::shouldUseIntegerScrollOffset(); |
| } |
| |
| void VisualViewport::setScrollPosition(const DoublePoint& scrollPoint, |
| ScrollType scrollType, |
| ScrollBehavior scrollBehavior) { |
| // We clamp the position here, because the ScrollAnimator may otherwise be |
| // set to a non-clamped position by ScrollableArea::setScrollPosition, |
| // which may lead to incorrect scrolling behavior in RootFrameViewport down |
| // the line. |
| // TODO(eseckler): Solve this instead by ensuring that ScrollableArea and |
| // ScrollAnimator are kept in sync. This requires that ScrollableArea always |
| // stores fractional offsets and that truncation happens elsewhere, see |
| // crbug.com/626315. |
| DoublePoint newScrollPosition = clampScrollPosition(scrollPoint); |
| ScrollableArea::setScrollPosition(newScrollPosition, scrollType, |
| scrollBehavior); |
| } |
| |
| int VisualViewport::scrollSize(ScrollbarOrientation orientation) const { |
| IntSize scrollDimensions = maximumScrollPosition() - minimumScrollPosition(); |
| return (orientation == HorizontalScrollbar) ? scrollDimensions.width() |
| : scrollDimensions.height(); |
| } |
| |
| IntPoint VisualViewport::minimumScrollPosition() const { |
| return IntPoint(); |
| } |
| |
| IntPoint VisualViewport::maximumScrollPosition() const { |
| return flooredIntPoint(maximumScrollPositionDouble()); |
| } |
| |
| DoublePoint VisualViewport::maximumScrollPositionDouble() const { |
| if (!mainFrame()) |
| return IntPoint(); |
| |
| // TODO(bokan): We probably shouldn't be storing the bounds in a float. |
| // crbug.com/470718. |
| FloatSize frameViewSize(contentsSize()); |
| |
| if (m_topControlsAdjustment) { |
| float minScale = |
| frameHost().pageScaleConstraintsSet().finalConstraints().minimumScale; |
| frameViewSize.expand(0, m_topControlsAdjustment / minScale); |
| } |
| |
| frameViewSize.scale(m_scale); |
| frameViewSize = FloatSize(flooredIntSize(frameViewSize)); |
| |
| FloatSize viewportSize(m_size); |
| viewportSize.expand(0, ceilf(m_topControlsAdjustment)); |
| |
| FloatSize maxPosition = frameViewSize - viewportSize; |
| maxPosition.scale(1 / m_scale); |
| return DoublePoint(maxPosition); |
| } |
| |
| IntPoint VisualViewport::clampDocumentOffsetAtScale(const IntPoint& offset, |
| float scale) { |
| if (!mainFrame() || !mainFrame()->view()) |
| return IntPoint(); |
| |
| FrameView* view = mainFrame()->view(); |
| |
| FloatSize scaledSize(m_size); |
| scaledSize.scale(1 / scale); |
| |
| IntPoint visualViewportMax = |
| flooredIntPoint(FloatSize(contentsSize()) - scaledSize); |
| IntPoint max = view->maximumScrollPosition() + visualViewportMax; |
| IntPoint min = |
| view->minimumScrollPosition(); // VisualViewportMin should be (0, 0) |
| |
| IntPoint clamped = offset; |
| clamped = clamped.shrunkTo(max); |
| clamped = clamped.expandedTo(min); |
| return clamped; |
| } |
| |
| void VisualViewport::setTopControlsAdjustment(float adjustment) { |
| m_topControlsAdjustment = adjustment; |
| } |
| |
| IntRect VisualViewport::scrollableAreaBoundingBox() const { |
| // This method should return the bounding box in the parent view's coordinate |
| // space; however, VisualViewport technically isn't a child of any Frames. |
| // Nonetheless, the VisualViewport always occupies the entire main frame so |
| // just return that. |
| LocalFrame* frame = mainFrame(); |
| |
| if (!frame || !frame->view()) |
| return IntRect(); |
| |
| return frame->view()->frameRect(); |
| } |
| |
| IntSize VisualViewport::contentsSize() const { |
| LocalFrame* frame = mainFrame(); |
| |
| if (!frame || !frame->view()) |
| return IntSize(); |
| |
| return frame->view()->visibleContentRect(IncludeScrollbars).size(); |
| } |
| |
| void VisualViewport::setScrollOffset(const DoublePoint& offset, |
| ScrollType scrollType) { |
| if (didSetScaleOrLocation(m_scale, toFloatPoint(offset)) && |
| scrollType != AnchoringScroll) |
| notifyRootFrameViewport(); |
| } |
| |
| GraphicsLayer* VisualViewport::layerForContainer() const { |
| return m_innerViewportContainerLayer.get(); |
| } |
| |
| GraphicsLayer* VisualViewport::layerForScrolling() const { |
| return m_innerViewportScrollLayer.get(); |
| } |
| |
| GraphicsLayer* VisualViewport::layerForHorizontalScrollbar() const { |
| return m_overlayScrollbarHorizontal.get(); |
| } |
| |
| GraphicsLayer* VisualViewport::layerForVerticalScrollbar() const { |
| return m_overlayScrollbarVertical.get(); |
| } |
| |
| IntRect VisualViewport::computeInterestRect(const GraphicsLayer*, |
| const IntRect&) const { |
| return IntRect(); |
| } |
| |
| void VisualViewport::paintContents(const GraphicsLayer*, |
| GraphicsContext&, |
| GraphicsLayerPaintingPhase, |
| const IntRect&) const {} |
| |
| LocalFrame* VisualViewport::mainFrame() const { |
| return frameHost().page().mainFrame() && |
| frameHost().page().mainFrame()->isLocalFrame() |
| ? frameHost().page().deprecatedLocalMainFrame() |
| : 0; |
| } |
| |
| Widget* VisualViewport::getWidget() { |
| return mainFrame()->view(); |
| } |
| |
| FloatPoint VisualViewport::clampOffsetToBoundaries(const FloatPoint& offset) { |
| FloatPoint clampedOffset(offset); |
| clampedOffset = |
| clampedOffset.shrunkTo(FloatPoint(maximumScrollPositionDouble())); |
| clampedOffset = |
| clampedOffset.expandedTo(FloatPoint(minimumScrollPositionDouble())); |
| return clampedOffset; |
| } |
| |
| void VisualViewport::clampToBoundaries() { |
| setLocation(m_offset); |
| } |
| |
| FloatRect VisualViewport::viewportToRootFrame( |
| const FloatRect& rectInViewport) const { |
| FloatRect rectInRootFrame = rectInViewport; |
| rectInRootFrame.scale(1 / scale()); |
| rectInRootFrame.moveBy(location()); |
| return rectInRootFrame; |
| } |
| |
| IntRect VisualViewport::viewportToRootFrame( |
| const IntRect& rectInViewport) const { |
| // FIXME: How to snap to pixels? |
| return enclosingIntRect(viewportToRootFrame(FloatRect(rectInViewport))); |
| } |
| |
| FloatRect VisualViewport::rootFrameToViewport( |
| const FloatRect& rectInRootFrame) const { |
| FloatRect rectInViewport = rectInRootFrame; |
| rectInViewport.moveBy(-location()); |
| rectInViewport.scale(scale()); |
| return rectInViewport; |
| } |
| |
| IntRect VisualViewport::rootFrameToViewport( |
| const IntRect& rectInRootFrame) const { |
| // FIXME: How to snap to pixels? |
| return enclosingIntRect(rootFrameToViewport(FloatRect(rectInRootFrame))); |
| } |
| |
| FloatPoint VisualViewport::viewportToRootFrame( |
| const FloatPoint& pointInViewport) const { |
| FloatPoint pointInRootFrame = pointInViewport; |
| pointInRootFrame.scale(1 / scale(), 1 / scale()); |
| pointInRootFrame.moveBy(location()); |
| return pointInRootFrame; |
| } |
| |
| FloatPoint VisualViewport::rootFrameToViewport( |
| const FloatPoint& pointInRootFrame) const { |
| FloatPoint pointInViewport = pointInRootFrame; |
| pointInViewport.moveBy(-location()); |
| pointInViewport.scale(scale(), scale()); |
| return pointInViewport; |
| } |
| |
| IntPoint VisualViewport::viewportToRootFrame( |
| const IntPoint& pointInViewport) const { |
| // FIXME: How to snap to pixels? |
| return flooredIntPoint( |
| FloatPoint(viewportToRootFrame(FloatPoint(pointInViewport)))); |
| } |
| |
| IntPoint VisualViewport::rootFrameToViewport( |
| const IntPoint& pointInRootFrame) const { |
| // FIXME: How to snap to pixels? |
| return flooredIntPoint( |
| FloatPoint(rootFrameToViewport(FloatPoint(pointInRootFrame)))); |
| } |
| |
| void VisualViewport::startTrackingPinchStats() { |
| if (!mainFrame()) |
| return; |
| |
| Document* document = mainFrame()->document(); |
| if (!document) |
| return; |
| |
| if (!document->url().protocolIsInHTTPFamily()) |
| return; |
| |
| m_trackPinchZoomStatsForPage = !shouldDisableDesktopWorkarounds(); |
| } |
| |
| void VisualViewport::userDidChangeScale() { |
| if (!m_trackPinchZoomStatsForPage) |
| return; |
| |
| m_maxPageScale = std::max(m_maxPageScale, m_scale); |
| } |
| |
| void VisualViewport::sendUMAMetrics() { |
| if (m_trackPinchZoomStatsForPage) { |
| bool didScale = m_maxPageScale > 0; |
| |
| DEFINE_STATIC_LOCAL(EnumerationHistogram, didScaleHistogram, |
| ("Viewport.DidScalePage", 2)); |
| didScaleHistogram.count(didScale ? 1 : 0); |
| |
| if (didScale) { |
| int zoomPercentage = floor(m_maxPageScale * 100); |
| |
| // See the PageScaleFactor enumeration in histograms.xml for the bucket |
| // ranges. |
| int bucket = floor(zoomPercentage / 25.f); |
| |
| DEFINE_STATIC_LOCAL(EnumerationHistogram, maxScaleHistogram, |
| ("Viewport.MaxPageScale", 21)); |
| maxScaleHistogram.count(bucket); |
| } |
| } |
| |
| m_maxPageScale = -1; |
| m_trackPinchZoomStatsForPage = false; |
| } |
| |
| bool VisualViewport::shouldDisableDesktopWorkarounds() const { |
| if (!mainFrame() || !mainFrame()->view()) |
| return false; |
| |
| if (!mainFrame()->settings()->viewportEnabled()) |
| return false; |
| |
| // A document is considered adapted to small screen UAs if one of these holds: |
| // 1. The author specified viewport has a constrained width that is equal to |
| // the initial viewport width. |
| // 2. The author has disabled viewport zoom. |
| const PageScaleConstraints& constraints = |
| frameHost().pageScaleConstraintsSet().pageDefinedConstraints(); |
| |
| return mainFrame()->view()->layoutSize().width() == m_size.width() || |
| (constraints.minimumScale == constraints.maximumScale && |
| constraints.minimumScale != -1); |
| } |
| |
| CompositorAnimationTimeline* VisualViewport::compositorAnimationTimeline() |
| const { |
| ScrollingCoordinator* c = frameHost().page().scrollingCoordinator(); |
| return c ? c->compositorAnimationTimeline() : nullptr; |
| } |
| |
| void VisualViewport::notifyRootFrameViewport() const { |
| if (!mainFrame() || !mainFrame()->view()) |
| return; |
| |
| RootFrameViewport* rootFrameViewport = |
| mainFrame()->view()->getRootFrameViewport(); |
| |
| if (!rootFrameViewport) |
| return; |
| |
| rootFrameViewport->didUpdateVisualViewport(); |
| } |
| |
| String VisualViewport::debugName(const GraphicsLayer* graphicsLayer) const { |
| String name; |
| if (graphicsLayer == m_innerViewportContainerLayer.get()) { |
| name = "Inner Viewport Container Layer"; |
| } else if (graphicsLayer == m_overscrollElasticityLayer.get()) { |
| name = "Overscroll Elasticity Layer"; |
| } else if (graphicsLayer == m_pageScaleLayer.get()) { |
| name = "Page Scale Layer"; |
| } else if (graphicsLayer == m_innerViewportScrollLayer.get()) { |
| name = "Inner Viewport Scroll Layer"; |
| } else if (graphicsLayer == m_overlayScrollbarHorizontal.get()) { |
| name = "Overlay Scrollbar Horizontal Layer"; |
| } else if (graphicsLayer == m_overlayScrollbarVertical.get()) { |
| name = "Overlay Scrollbar Vertical Layer"; |
| } else if (graphicsLayer == m_rootTransformLayer.get()) { |
| name = "Root Transform Layer"; |
| } else { |
| ASSERT_NOT_REACHED(); |
| } |
| |
| return name; |
| } |
| |
| } // namespace blink |