mirror of
https://github.com/classilla/tenfourfox.git
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885 lines
26 KiB
C++
885 lines
26 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_FRAMEMETRICS_H
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#define GFX_FRAMEMETRICS_H
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#include <stdint.h> // for uint32_t, uint64_t
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#include "Units.h" // for CSSRect, CSSPixel, etc
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#include "mozilla/Maybe.h"
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#include "mozilla/gfx/BasePoint.h" // for BasePoint
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#include "mozilla/gfx/Rect.h" // for RoundedIn
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#include "mozilla/gfx/ScaleFactor.h" // for ScaleFactor
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#include "mozilla/gfx/Logging.h" // for Log
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#include "nsString.h"
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namespace IPC {
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template <typename T> struct ParamTraits;
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} // namespace IPC
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namespace mozilla {
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namespace layers {
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/**
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* The viewport and displayport metrics for the painted frame at the
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* time of a layer-tree transaction. These metrics are especially
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* useful for shadow layers, because the metrics values are updated
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* atomically with new pixels.
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*/
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struct FrameMetrics {
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friend struct IPC::ParamTraits<mozilla::layers::FrameMetrics>;
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public:
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// We use IDs to identify frames across processes.
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typedef uint64_t ViewID;
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static const ViewID NULL_SCROLL_ID; // This container layer does not scroll.
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static const ViewID START_SCROLL_ID = 2; // This is the ID that scrolling subframes
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// will begin at.
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static const FrameMetrics sNullMetrics; // We often need an empty metrics
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FrameMetrics()
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: mPresShellResolution(1)
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, mCompositionBounds(0, 0, 0, 0)
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, mDisplayPort(0, 0, 0, 0)
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, mCriticalDisplayPort(0, 0, 0, 0)
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, mScrollableRect(0, 0, 0, 0)
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, mCumulativeResolution()
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, mDevPixelsPerCSSPixel(1)
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, mIsRootContent(false)
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, mHasScrollgrab(false)
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, mScrollId(NULL_SCROLL_ID)
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, mScrollParentId(NULL_SCROLL_ID)
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, mScrollOffset(0, 0)
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, mZoom()
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, mUpdateScrollOffset(false)
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, mScrollGeneration(0)
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, mDoSmoothScroll(false)
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, mSmoothScrollOffset(0, 0)
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, mRootCompositionSize(0, 0)
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, mDisplayPortMargins(0, 0, 0, 0)
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, mUseDisplayPortMargins(false)
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, mPresShellId(-1)
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, mViewport(0, 0, 0, 0)
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, mExtraResolution()
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, mBackgroundColor()
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, mLineScrollAmount(0, 0)
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, mPageScrollAmount(0, 0)
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, mAllowVerticalScrollWithWheel(false)
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, mIsLayersIdRoot(false)
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, mUsesContainerScrolling(false)
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{
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}
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// Default copy ctor and operator= are fine
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bool operator==(const FrameMetrics& aOther) const
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{
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return mCompositionBounds.IsEqualEdges(aOther.mCompositionBounds) &&
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mRootCompositionSize == aOther.mRootCompositionSize &&
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mDisplayPort.IsEqualEdges(aOther.mDisplayPort) &&
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mDisplayPortMargins == aOther.mDisplayPortMargins &&
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mUseDisplayPortMargins == aOther.mUseDisplayPortMargins &&
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mCriticalDisplayPort.IsEqualEdges(aOther.mCriticalDisplayPort) &&
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mViewport.IsEqualEdges(aOther.mViewport) &&
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mScrollableRect.IsEqualEdges(aOther.mScrollableRect) &&
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mPresShellResolution == aOther.mPresShellResolution &&
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mCumulativeResolution == aOther.mCumulativeResolution &&
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mDevPixelsPerCSSPixel == aOther.mDevPixelsPerCSSPixel &&
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mPresShellId == aOther.mPresShellId &&
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mIsRootContent == aOther.mIsRootContent &&
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mScrollId == aOther.mScrollId &&
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mScrollParentId == aOther.mScrollParentId &&
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mScrollOffset == aOther.mScrollOffset &&
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mSmoothScrollOffset == aOther.mSmoothScrollOffset &&
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mHasScrollgrab == aOther.mHasScrollgrab &&
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mUpdateScrollOffset == aOther.mUpdateScrollOffset &&
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mScrollGeneration == aOther.mScrollGeneration &&
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mExtraResolution == aOther.mExtraResolution &&
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mBackgroundColor == aOther.mBackgroundColor &&
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mDoSmoothScroll == aOther.mDoSmoothScroll &&
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mLineScrollAmount == aOther.mLineScrollAmount &&
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mPageScrollAmount == aOther.mPageScrollAmount &&
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mAllowVerticalScrollWithWheel == aOther.mAllowVerticalScrollWithWheel &&
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mClipRect == aOther.mClipRect &&
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mMaskLayerIndex == aOther.mMaskLayerIndex &&
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mIsLayersIdRoot == aOther.mIsLayersIdRoot &&
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mUsesContainerScrolling == aOther.mUsesContainerScrolling;
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}
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bool operator!=(const FrameMetrics& aOther) const
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{
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return !operator==(aOther);
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}
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bool IsDefault() const
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{
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FrameMetrics def;
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def.mPresShellId = mPresShellId;
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return (def == *this);
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}
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bool IsScrollable() const
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{
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return mScrollId != NULL_SCROLL_ID;
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}
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CSSToScreenScale2D DisplayportPixelsPerCSSPixel() const
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{
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// Note: use 'mZoom * ParentLayerToLayerScale(1.0f)' as the CSS-to-Layer scale
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// instead of LayersPixelsPerCSSPixel(), because displayport calculations
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// are done in the context of a repaint request, where we ask Layout to
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// repaint at a new resolution that includes any async zoom. Until this
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// repaint request is processed, LayersPixelsPerCSSPixel() does not yet
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// include the async zoom, but it will when the displayport is interpreted
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// for the repaint.
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return mZoom * ParentLayerToLayerScale(1.0f) / mExtraResolution;
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}
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CSSToLayerScale2D LayersPixelsPerCSSPixel() const
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{
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return mDevPixelsPerCSSPixel * mCumulativeResolution;
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}
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// Get the amount by which this frame has been zoomed since the last repaint.
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LayerToParentLayerScale GetAsyncZoom() const
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{
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// The async portion of the zoom should be the same along the x and y
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// axes.
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return (mZoom / LayersPixelsPerCSSPixel()).ToScaleFactor();
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}
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// Ensure the scrollableRect is at least as big as the compositionBounds
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// because the scrollableRect can be smaller if the content is not large
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// and the scrollableRect hasn't been updated yet.
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// We move the scrollableRect up because we don't know if we can move it
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// down. i.e. we know that scrollableRect can go back as far as zero.
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// but we don't know how much further ahead it can go.
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CSSRect GetExpandedScrollableRect() const
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{
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CSSRect scrollableRect = mScrollableRect;
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CSSSize compSize = CalculateCompositedSizeInCssPixels();
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if (scrollableRect.width < compSize.width) {
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scrollableRect.x = std::max(0.f,
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scrollableRect.x - (compSize.width - scrollableRect.width));
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scrollableRect.width = compSize.width;
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}
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if (scrollableRect.height < compSize.height) {
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scrollableRect.y = std::max(0.f,
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scrollableRect.y - (compSize.height - scrollableRect.height));
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scrollableRect.height = compSize.height;
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}
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return scrollableRect;
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}
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CSSSize CalculateCompositedSizeInCssPixels() const
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{
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return mCompositionBounds.Size() / GetZoom();
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}
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CSSRect CalculateCompositedRectInCssPixels() const
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{
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return mCompositionBounds / GetZoom();
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}
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CSSSize CalculateBoundedCompositedSizeInCssPixels() const
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{
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CSSSize size = CalculateCompositedSizeInCssPixels();
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size.width = std::min(size.width, mRootCompositionSize.width);
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size.height = std::min(size.height, mRootCompositionSize.height);
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return size;
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}
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void ScrollBy(const CSSPoint& aPoint)
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{
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mScrollOffset += aPoint;
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}
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void ZoomBy(float aScale)
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{
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ZoomBy(gfxSize(aScale, aScale));
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}
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void ZoomBy(const gfxSize& aScale)
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{
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mZoom.xScale *= aScale.width;
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mZoom.yScale *= aScale.height;
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}
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void CopyScrollInfoFrom(const FrameMetrics& aOther)
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{
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mScrollOffset = aOther.mScrollOffset;
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mScrollGeneration = aOther.mScrollGeneration;
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}
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void CopySmoothScrollInfoFrom(const FrameMetrics& aOther)
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{
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mSmoothScrollOffset = aOther.mSmoothScrollOffset;
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mScrollGeneration = aOther.mScrollGeneration;
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mDoSmoothScroll = aOther.mDoSmoothScroll;
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}
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// Make a copy of this FrameMetrics object which does not have any pointers
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// to heap-allocated memory (i.e. is Plain Old Data, or 'POD'), and is
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// therefore safe to be placed into shared memory.
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FrameMetrics MakePODObject() const
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{
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FrameMetrics copy = *this;
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copy.mContentDescription.Truncate();
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return copy;
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}
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public:
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void SetPresShellResolution(float aPresShellResolution)
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{
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mPresShellResolution = aPresShellResolution;
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}
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float GetPresShellResolution() const
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{
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return mPresShellResolution;
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}
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void SetCompositionBounds(const ParentLayerRect& aCompositionBounds)
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{
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mCompositionBounds = aCompositionBounds;
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}
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const ParentLayerRect& GetCompositionBounds() const
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{
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return mCompositionBounds;
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}
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void SetDisplayPort(const CSSRect& aDisplayPort)
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{
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mDisplayPort = aDisplayPort;
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}
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const CSSRect& GetDisplayPort() const
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{
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return mDisplayPort;
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}
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void SetCriticalDisplayPort(const CSSRect& aCriticalDisplayPort)
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{
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mCriticalDisplayPort = aCriticalDisplayPort;
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}
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const CSSRect& GetCriticalDisplayPort() const
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{
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return mCriticalDisplayPort;
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}
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void SetCumulativeResolution(const LayoutDeviceToLayerScale2D& aCumulativeResolution)
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{
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mCumulativeResolution = aCumulativeResolution;
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}
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const LayoutDeviceToLayerScale2D& GetCumulativeResolution() const
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{
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return mCumulativeResolution;
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}
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void SetDevPixelsPerCSSPixel(const CSSToLayoutDeviceScale& aDevPixelsPerCSSPixel)
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{
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mDevPixelsPerCSSPixel = aDevPixelsPerCSSPixel;
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}
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const CSSToLayoutDeviceScale& GetDevPixelsPerCSSPixel() const
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{
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return mDevPixelsPerCSSPixel;
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}
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void SetIsRootContent(bool aIsRootContent)
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{
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mIsRootContent = aIsRootContent;
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}
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bool IsRootContent() const
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{
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return mIsRootContent;
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}
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void SetHasScrollgrab(bool aHasScrollgrab)
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{
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mHasScrollgrab = aHasScrollgrab;
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}
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bool GetHasScrollgrab() const
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{
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return mHasScrollgrab;
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}
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void SetScrollOffset(const CSSPoint& aScrollOffset)
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{
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mScrollOffset = aScrollOffset;
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}
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const CSSPoint& GetScrollOffset() const
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{
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return mScrollOffset;
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}
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void SetSmoothScrollOffset(const CSSPoint& aSmoothScrollDestination)
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{
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mSmoothScrollOffset = aSmoothScrollDestination;
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}
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const CSSPoint& GetSmoothScrollOffset() const
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{
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return mSmoothScrollOffset;
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}
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void SetZoom(const CSSToParentLayerScale2D& aZoom)
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{
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mZoom = aZoom;
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}
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const CSSToParentLayerScale2D& GetZoom() const
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{
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return mZoom;
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}
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void SetScrollOffsetUpdated(uint32_t aScrollGeneration)
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{
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mUpdateScrollOffset = true;
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mScrollGeneration = aScrollGeneration;
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}
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void SetSmoothScrollOffsetUpdated(int32_t aScrollGeneration)
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{
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mDoSmoothScroll = true;
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mScrollGeneration = aScrollGeneration;
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}
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bool GetScrollOffsetUpdated() const
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{
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return mUpdateScrollOffset;
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}
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bool GetDoSmoothScroll() const
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{
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return mDoSmoothScroll;
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}
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uint32_t GetScrollGeneration() const
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{
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return mScrollGeneration;
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}
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ViewID GetScrollId() const
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{
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return mScrollId;
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}
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void SetScrollId(ViewID scrollId)
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{
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mScrollId = scrollId;
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}
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ViewID GetScrollParentId() const
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{
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return mScrollParentId;
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}
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void SetScrollParentId(ViewID aParentId)
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{
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mScrollParentId = aParentId;
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}
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void SetRootCompositionSize(const CSSSize& aRootCompositionSize)
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{
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mRootCompositionSize = aRootCompositionSize;
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}
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const CSSSize& GetRootCompositionSize() const
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{
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return mRootCompositionSize;
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}
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void SetDisplayPortMargins(const ScreenMargin& aDisplayPortMargins)
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{
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mDisplayPortMargins = aDisplayPortMargins;
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}
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const ScreenMargin& GetDisplayPortMargins() const
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{
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return mDisplayPortMargins;
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}
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void SetUseDisplayPortMargins()
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{
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mUseDisplayPortMargins = true;
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}
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bool GetUseDisplayPortMargins() const
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{
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return mUseDisplayPortMargins;
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}
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uint32_t GetPresShellId() const
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{
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return mPresShellId;
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}
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void SetPresShellId(uint32_t aPresShellId)
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{
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mPresShellId = aPresShellId;
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}
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void SetViewport(const CSSRect& aViewport)
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{
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mViewport = aViewport;
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}
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const CSSRect& GetViewport() const
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{
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return mViewport;
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}
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void SetExtraResolution(const ScreenToLayerScale2D& aExtraResolution)
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{
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mExtraResolution = aExtraResolution;
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}
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const ScreenToLayerScale2D& GetExtraResolution() const
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{
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return mExtraResolution;
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}
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const gfx::Color& GetBackgroundColor() const
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{
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return mBackgroundColor;
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}
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void SetBackgroundColor(const gfx::Color& aBackgroundColor)
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{
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mBackgroundColor = aBackgroundColor;
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}
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const nsCString& GetContentDescription() const
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{
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return mContentDescription;
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}
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void SetContentDescription(const nsCString& aContentDescription)
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{
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mContentDescription = aContentDescription;
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}
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const LayoutDeviceIntSize& GetLineScrollAmount() const
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{
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return mLineScrollAmount;
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}
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void SetLineScrollAmount(const LayoutDeviceIntSize& size)
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{
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mLineScrollAmount = size;
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}
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const LayoutDeviceIntSize& GetPageScrollAmount() const
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{
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return mPageScrollAmount;
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}
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void SetPageScrollAmount(const LayoutDeviceIntSize& size)
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{
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mPageScrollAmount = size;
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}
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const CSSRect& GetScrollableRect() const
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{
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return mScrollableRect;
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}
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void SetScrollableRect(const CSSRect& aScrollableRect)
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{
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mScrollableRect = aScrollableRect;
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}
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bool AllowVerticalScrollWithWheel() const
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{
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return mAllowVerticalScrollWithWheel;
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}
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void SetAllowVerticalScrollWithWheel()
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{
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mAllowVerticalScrollWithWheel = true;
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}
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void SetClipRect(const Maybe<ParentLayerIntRect>& aClipRect)
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{
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mClipRect = aClipRect;
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}
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const Maybe<ParentLayerIntRect>& GetClipRect() const
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{
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return mClipRect;
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}
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bool HasClipRect() const {
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return mClipRect.isSome();
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}
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const ParentLayerIntRect& ClipRect() const {
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return mClipRect.ref();
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}
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void SetMaskLayerIndex(const Maybe<size_t>& aIndex) {
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mMaskLayerIndex = aIndex;
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}
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const Maybe<size_t>& GetMaskLayerIndex() const {
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return mMaskLayerIndex;
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}
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void SetIsLayersIdRoot(bool aValue) {
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mIsLayersIdRoot = aValue;
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}
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bool IsLayersIdRoot() const {
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return mIsLayersIdRoot;
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}
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// Implemented out of line because the implementation needs gfxPrefs.h
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// and we don't want to include that from FrameMetrics.h.
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void SetUsesContainerScrolling(bool aValue);
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bool UsesContainerScrolling() const {
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return mUsesContainerScrolling;
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}
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private:
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// The pres-shell resolution that has been induced on the document containing
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// this scroll frame as a result of zooming this scroll frame (whether via
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// user action, or choosing an initial zoom level on page load). This can
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// only be different from 1.0 for frames that are zoomable, which currently
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// is just the root content document's root scroll frame (mIsRoot = true).
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// This is a plain float rather than a ScaleFactor because in and of itself
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// it does not convert between any coordinate spaces for which we have names.
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float mPresShellResolution;
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// This is the area within the widget that we're compositing to. It is in the
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// same coordinate space as the reference frame for the scrolled frame.
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//
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// This is useful because, on mobile, the viewport and composition dimensions
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// are not always the same. In this case, we calculate the displayport using
|
|
// an area bigger than the region we're compositing to. If we used the
|
|
// viewport dimensions to calculate the displayport, we'd run into situations
|
|
// where we're prerendering the wrong regions and the content may be clipped,
|
|
// or too much of it prerendered. If the composition dimensions are the same
|
|
// as the viewport dimensions, there is no need for this and we can just use
|
|
// the viewport instead.
|
|
//
|
|
// This value is valid for nested scrollable layers as well, and is still
|
|
// relative to the layer tree origin. This value is provided by Gecko at
|
|
// layout/paint time.
|
|
ParentLayerRect mCompositionBounds;
|
|
|
|
// The area of a frame's contents that has been painted, relative to
|
|
// mCompositionBounds.
|
|
//
|
|
// Note that this is structured in such a way that it doesn't depend on the
|
|
// method layout uses to scroll content.
|
|
//
|
|
// May be larger or smaller than |mScrollableRect|.
|
|
//
|
|
// To pre-render a margin of 100 CSS pixels around the window,
|
|
// { x = -100, y = - 100,
|
|
// width = window.innerWidth + 200, height = window.innerHeight + 200 }
|
|
CSSRect mDisplayPort;
|
|
|
|
// If non-empty, the area of a frame's contents that is considered critical
|
|
// to paint. Area outside of this area (i.e. area inside mDisplayPort, but
|
|
// outside of mCriticalDisplayPort) is considered low-priority, and may be
|
|
// painted with lower precision, or not painted at all.
|
|
//
|
|
// The same restrictions for mDisplayPort apply here.
|
|
CSSRect mCriticalDisplayPort;
|
|
|
|
// The scrollable bounds of a frame. This is determined by reflow.
|
|
// Ordinarily the x and y will be 0 and the width and height will be the
|
|
// size of the element being scrolled. However for RTL pages or elements
|
|
// the x value may be negative.
|
|
//
|
|
// This is relative to the document. It is in the same coordinate space as
|
|
// |mScrollOffset|, but a different coordinate space than |mViewport| and
|
|
// |mDisplayPort|. Note also that this coordinate system is understood by
|
|
// window.scrollTo().
|
|
//
|
|
// This is valid on any layer unless it has no content.
|
|
CSSRect mScrollableRect;
|
|
|
|
// The cumulative resolution that the current frame has been painted at.
|
|
// This is the product of the pres-shell resolutions of the document
|
|
// containing this scroll frame and its ancestors, and any css-driven
|
|
// resolution. This information is provided by Gecko at layout/paint time.
|
|
// Note that this is allowed to have different x- and y-scales, but only
|
|
// for subframes (mIsRoot = false). (The same applies to other scales that
|
|
// "inherit" the 2D-ness of this one, such as mZoom.)
|
|
LayoutDeviceToLayerScale2D mCumulativeResolution;
|
|
|
|
// New fields from now on should be made private and old fields should
|
|
// be refactored to be private.
|
|
|
|
// The conversion factor between CSS pixels and device pixels for this frame.
|
|
// This can vary based on a variety of things, such as reflowing-zoom. The
|
|
// conversion factor for device pixels to layers pixels is just the
|
|
// resolution.
|
|
CSSToLayoutDeviceScale mDevPixelsPerCSSPixel;
|
|
|
|
// Whether or not this is the root scroll frame for the root content document.
|
|
bool mIsRootContent;
|
|
|
|
// Whether or not this frame is for an element marked 'scrollgrab'.
|
|
bool mHasScrollgrab;
|
|
|
|
// A unique ID assigned to each scrollable frame.
|
|
ViewID mScrollId;
|
|
|
|
// The ViewID of the scrollable frame to which overscroll should be handed off.
|
|
ViewID mScrollParentId;
|
|
|
|
// The position of the top-left of the CSS viewport, relative to the document
|
|
// (or the document relative to the viewport, if that helps understand it).
|
|
//
|
|
// Thus it is relative to the document. It is in the same coordinate space as
|
|
// |mScrollableRect|, but a different coordinate space than |mViewport| and
|
|
// |mDisplayPort|.
|
|
//
|
|
// It is required that the rect:
|
|
// { x = mScrollOffset.x, y = mScrollOffset.y,
|
|
// width = mCompositionBounds.x / mResolution.scale,
|
|
// height = mCompositionBounds.y / mResolution.scale }
|
|
// Be within |mScrollableRect|.
|
|
//
|
|
// This is valid for any layer, but is always relative to this frame and
|
|
// not any parents, regardless of parent transforms.
|
|
CSSPoint mScrollOffset;
|
|
|
|
// The "user zoom". Content is painted by gecko at mResolution * mDevPixelsPerCSSPixel,
|
|
// but will be drawn to the screen at mZoom. In the steady state, the
|
|
// two will be the same, but during an async zoom action the two may
|
|
// diverge. This information is initialized in Gecko but updated in the APZC.
|
|
CSSToParentLayerScale2D mZoom;
|
|
|
|
// Whether mScrollOffset was updated by something other than the APZ code, and
|
|
// if the APZC receiving this metrics should update its local copy.
|
|
bool mUpdateScrollOffset;
|
|
// The scroll generation counter used to acknowledge the scroll offset update.
|
|
uint32_t mScrollGeneration;
|
|
|
|
// When mDoSmoothScroll, the scroll offset should be animated to
|
|
// smoothly transition to mScrollOffset rather than be updated instantly.
|
|
bool mDoSmoothScroll;
|
|
CSSPoint mSmoothScrollOffset;
|
|
|
|
// The size of the root scrollable's composition bounds, but in local CSS pixels.
|
|
CSSSize mRootCompositionSize;
|
|
|
|
// A display port expressed as layer margins that apply to the rect of what
|
|
// is drawn of the scrollable element.
|
|
ScreenMargin mDisplayPortMargins;
|
|
|
|
// If this is true then we use the display port margins on this metrics,
|
|
// otherwise use the display port rect.
|
|
bool mUseDisplayPortMargins;
|
|
|
|
uint32_t mPresShellId;
|
|
|
|
// The CSS viewport, which is the dimensions we're using to constrain the
|
|
// <html> element of this frame, relative to the top-left of the layer. Note
|
|
// that its offset is structured in such a way that it doesn't depend on the
|
|
// method layout uses to scroll content.
|
|
//
|
|
// This is mainly useful on the root layer, however nested iframes can have
|
|
// their own viewport, which will just be the size of the window of the
|
|
// iframe. For layers that don't correspond to a document, this metric is
|
|
// meaningless and invalid.
|
|
CSSRect mViewport;
|
|
|
|
// The extra resolution at which content in this scroll frame is drawn beyond
|
|
// that necessary to draw one Layer pixel per Screen pixel.
|
|
ScreenToLayerScale2D mExtraResolution;
|
|
|
|
// The background color to use when overscrolling.
|
|
gfx::Color mBackgroundColor;
|
|
|
|
// A description of the content element corresponding to this frame.
|
|
// This is empty unless this is a scrollable layer and the
|
|
// apz.printtree pref is turned on.
|
|
nsCString mContentDescription;
|
|
|
|
// The value of GetLineScrollAmount(), for scroll frames.
|
|
LayoutDeviceIntSize mLineScrollAmount;
|
|
|
|
// The value of GetPageScrollAmount(), for scroll frames.
|
|
LayoutDeviceIntSize mPageScrollAmount;
|
|
|
|
// Whether or not the frame can be vertically scrolled with a mouse wheel.
|
|
bool mAllowVerticalScrollWithWheel;
|
|
|
|
// The clip rect to use when compositing a layer with this FrameMetrics.
|
|
Maybe<ParentLayerIntRect> mClipRect;
|
|
|
|
// An extra clip mask layer to use when compositing a layer with this
|
|
// FrameMetrics. This is an index into the MetricsMaskLayers array on
|
|
// the Layer.
|
|
Maybe<size_t> mMaskLayerIndex;
|
|
|
|
// Whether these framemetrics are for the root scroll frame (root element if
|
|
// we don't have a root scroll frame) for its layers id.
|
|
bool mIsLayersIdRoot;
|
|
|
|
// True if scrolling using containers, false otherwise. This can be removed
|
|
// when containerful scrolling is eliminated.
|
|
bool mUsesContainerScrolling;
|
|
|
|
// WARNING!!!!
|
|
//
|
|
// When adding new fields to FrameMetrics, the following places should be
|
|
// updated to include them (as needed):
|
|
// FrameMetrics::operator ==
|
|
// AsyncPanZoomController::NotifyLayersUpdated
|
|
// The ParamTraits specialization in GfxMessageUtils.h
|
|
//
|
|
// Please add new fields above this comment.
|
|
};
|
|
|
|
/**
|
|
* This class allows us to uniquely identify a scrollable layer. The
|
|
* mLayersId identifies the layer tree (corresponding to a child process
|
|
* and/or tab) that the scrollable layer belongs to. The mPresShellId
|
|
* is a temporal identifier (corresponding to the document loaded that
|
|
* contains the scrollable layer, which may change over time). The
|
|
* mScrollId corresponds to the actual frame that is scrollable.
|
|
*/
|
|
struct ScrollableLayerGuid {
|
|
uint64_t mLayersId;
|
|
uint32_t mPresShellId;
|
|
FrameMetrics::ViewID mScrollId;
|
|
|
|
ScrollableLayerGuid()
|
|
: mLayersId(0)
|
|
, mPresShellId(0)
|
|
, mScrollId(0)
|
|
{
|
|
}
|
|
|
|
ScrollableLayerGuid(uint64_t aLayersId, uint32_t aPresShellId,
|
|
FrameMetrics::ViewID aScrollId)
|
|
: mLayersId(aLayersId)
|
|
, mPresShellId(aPresShellId)
|
|
, mScrollId(aScrollId)
|
|
{
|
|
}
|
|
|
|
ScrollableLayerGuid(uint64_t aLayersId, const FrameMetrics& aMetrics)
|
|
: mLayersId(aLayersId)
|
|
, mPresShellId(aMetrics.GetPresShellId())
|
|
, mScrollId(aMetrics.GetScrollId())
|
|
{
|
|
}
|
|
|
|
ScrollableLayerGuid(const ScrollableLayerGuid& other)
|
|
: mLayersId(other.mLayersId)
|
|
, mPresShellId(other.mPresShellId)
|
|
, mScrollId(other.mScrollId)
|
|
{
|
|
}
|
|
|
|
~ScrollableLayerGuid()
|
|
{
|
|
}
|
|
|
|
bool operator==(const ScrollableLayerGuid& other) const
|
|
{
|
|
return mLayersId == other.mLayersId
|
|
&& mPresShellId == other.mPresShellId
|
|
&& mScrollId == other.mScrollId;
|
|
}
|
|
|
|
bool operator!=(const ScrollableLayerGuid& other) const
|
|
{
|
|
return !(*this == other);
|
|
}
|
|
|
|
bool operator<(const ScrollableLayerGuid& other) const
|
|
{
|
|
if (mLayersId < other.mLayersId) {
|
|
return true;
|
|
}
|
|
if (mLayersId == other.mLayersId) {
|
|
if (mPresShellId < other.mPresShellId) {
|
|
return true;
|
|
}
|
|
if (mPresShellId == other.mPresShellId) {
|
|
return mScrollId < other.mScrollId;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
};
|
|
|
|
template <int LogLevel>
|
|
gfx::Log<LogLevel>& operator<<(gfx::Log<LogLevel>& log, const ScrollableLayerGuid& aGuid) {
|
|
return log << '(' << aGuid.mLayersId << ',' << aGuid.mPresShellId << ',' << aGuid.mScrollId << ')';
|
|
}
|
|
|
|
struct ZoomConstraints {
|
|
bool mAllowZoom;
|
|
bool mAllowDoubleTapZoom;
|
|
CSSToParentLayerScale mMinZoom;
|
|
CSSToParentLayerScale mMaxZoom;
|
|
|
|
ZoomConstraints()
|
|
: mAllowZoom(true)
|
|
, mAllowDoubleTapZoom(true)
|
|
{
|
|
MOZ_COUNT_CTOR(ZoomConstraints);
|
|
}
|
|
|
|
ZoomConstraints(bool aAllowZoom,
|
|
bool aAllowDoubleTapZoom,
|
|
const CSSToParentLayerScale& aMinZoom,
|
|
const CSSToParentLayerScale& aMaxZoom)
|
|
: mAllowZoom(aAllowZoom)
|
|
, mAllowDoubleTapZoom(aAllowDoubleTapZoom)
|
|
, mMinZoom(aMinZoom)
|
|
, mMaxZoom(aMaxZoom)
|
|
{
|
|
MOZ_COUNT_CTOR(ZoomConstraints);
|
|
}
|
|
|
|
ZoomConstraints(const ZoomConstraints& other)
|
|
: mAllowZoom(other.mAllowZoom)
|
|
, mAllowDoubleTapZoom(other.mAllowDoubleTapZoom)
|
|
, mMinZoom(other.mMinZoom)
|
|
, mMaxZoom(other.mMaxZoom)
|
|
{
|
|
MOZ_COUNT_CTOR(ZoomConstraints);
|
|
}
|
|
|
|
~ZoomConstraints()
|
|
{
|
|
MOZ_COUNT_DTOR(ZoomConstraints);
|
|
}
|
|
|
|
bool operator==(const ZoomConstraints& other) const
|
|
{
|
|
return mAllowZoom == other.mAllowZoom
|
|
&& mAllowDoubleTapZoom == other.mAllowDoubleTapZoom
|
|
&& mMinZoom == other.mMinZoom
|
|
&& mMaxZoom == other.mMaxZoom;
|
|
}
|
|
|
|
bool operator!=(const ZoomConstraints& other) const
|
|
{
|
|
return !(*this == other);
|
|
}
|
|
};
|
|
|
|
typedef Maybe<ZoomConstraints> MaybeZoomConstraints;
|
|
|
|
} // namespace layers
|
|
} // namespace mozilla
|
|
|
|
#endif /* GFX_FRAMEMETRICS_H */
|