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Diffstat (limited to 'gfx/layers/apz/test/gtest/TestWRScrollData.cpp')
| -rw-r--r-- | gfx/layers/apz/test/gtest/TestWRScrollData.cpp | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/gfx/layers/apz/test/gtest/TestWRScrollData.cpp b/gfx/layers/apz/test/gtest/TestWRScrollData.cpp new file mode 100644 index 0000000000..e267e58e90 --- /dev/null +++ b/gfx/layers/apz/test/gtest/TestWRScrollData.cpp @@ -0,0 +1,273 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "TestWRScrollData.h" +#include "APZTestAccess.h" +#include "gtest/gtest.h" +#include "FrameMetrics.h" +#include "gfxPlatform.h" +#include "mozilla/layers/APZUpdater.h" +#include "mozilla/layers/LayersTypes.h" +#include "mozilla/layers/ScrollableLayerGuid.h" +#include "mozilla/layers/WebRenderScrollDataWrapper.h" +#include "mozilla/UniquePtr.h" +#include "apz/src/APZCTreeManager.h" + +using mozilla::layers::APZCTreeManager; +using mozilla::layers::APZUpdater; +using mozilla::layers::LayersId; +using mozilla::layers::ScrollableLayerGuid; +using mozilla::layers::ScrollMetadata; +using mozilla::layers::TestWRScrollData; +using mozilla::layers::WebRenderLayerScrollData; +using mozilla::layers::WebRenderScrollDataWrapper; + +/* static */ +TestWRScrollData TestWRScrollData::Create(const char* aTreeShape, + const APZUpdater& aUpdater, + const LayerIntRegion* aVisibleRegions, + const gfx::Matrix4x4* aTransforms) { + // The WebRenderLayerScrollData tree needs to be created in a fairly + // particular way (for example, each node needs to know the number of + // descendants it has), so this function takes care to create the nodes + // in the same order as WebRenderCommandBuilder would. + TestWRScrollData result; + const size_t len = strlen(aTreeShape); + // "Layer index" in this function refers to the index by which a layer will + // be accessible via TestWRScrollData::GetLayer(), and matches the order + // in which the layer appears in |aTreeShape|. + size_t currentLayerIndex = 0; + struct LayerEntry { + size_t mLayerIndex; + int32_t mDescendantCount = 0; + }; + // Layers we have encountered in |aTreeShape|, but have not built a + // WebRenderLayerScrollData for. (It can only be built after its + // descendants have been encountered and counted.) + std::stack<LayerEntry> pendingLayers; + std::vector<WebRenderLayerScrollData> finishedLayers; + // Tracks the level of nesting of '(' characters. Starts at 1 to account + // for the root layer. + size_t depth = 1; + // Helper function for finishing a layer once all its descendants have been + // encountered. + auto finishLayer = [&] { + MOZ_ASSERT(!pendingLayers.empty()); + LayerEntry entry = pendingLayers.top(); + + WebRenderLayerScrollData layer; + APZTestAccess::InitializeForTest(layer, entry.mDescendantCount); + if (aVisibleRegions) { + layer.SetVisibleRegion(aVisibleRegions[entry.mLayerIndex]); + } + if (aTransforms) { + layer.SetTransform(aTransforms[entry.mLayerIndex]); + } + finishedLayers.push_back(std::move(layer)); + + // |finishedLayers| stores the layers in a different order than they + // appeared in |aTreeShape|. To be able to access layers by their layer + // index, keep a mapping from layer index to index in |finishedLayers|. + result.mIndexMap.emplace(entry.mLayerIndex, finishedLayers.size() - 1); + + pendingLayers.pop(); + + // Keep track of descendant counts. The +1 is for the layer just finished. + if (!pendingLayers.empty()) { + pendingLayers.top().mDescendantCount += (entry.mDescendantCount + 1); + } + }; + for (size_t i = 0; i < len; ++i) { + if (aTreeShape[i] == '(') { + ++depth; + } else if (aTreeShape[i] == ')') { + if (pendingLayers.size() <= 1) { + printf("Invalid tree shape: too many ')'\n"); + MOZ_CRASH(); + } + finishLayer(); // finish last layer at current depth + --depth; + } else { + if (aTreeShape[i] != 'x') { + printf("The only allowed character to represent a layer is 'x'\n"); + MOZ_CRASH(); + } + if (depth == pendingLayers.size()) { + // We have a previous layer at this same depth to finish. + if (depth <= 1) { + printf("The tree is only allowed to have one root\n"); + MOZ_CRASH(); + } + finishLayer(); + } + MOZ_ASSERT(depth == pendingLayers.size() + 1); + pendingLayers.push({currentLayerIndex}); + ++currentLayerIndex; + } + } + if (pendingLayers.size() != 1) { + printf("Invalid tree shape: '(' and ')' not balanced\n"); + MOZ_CRASH(); + } + finishLayer(); // finish root layer + + // As in WebRenderCommandBuilder, the layers need to be added to the + // WebRenderScrollData in reverse of the order in which they were built. + for (auto it = finishedLayers.rbegin(); it != finishedLayers.rend(); ++it) { + result.AddLayerData(std::move(*it)); + } + // mIndexMap also needs to be adjusted to accout for the reversal above. + for (auto& [layerIndex, storedIndex] : result.mIndexMap) { + (void)layerIndex; // suppress -Werror=unused-variable + storedIndex = result.GetLayerCount() - storedIndex - 1; + } + + return result; +} + +const WebRenderLayerScrollData* TestWRScrollData::operator[]( + size_t aLayerIndex) const { + auto it = mIndexMap.find(aLayerIndex); + if (it == mIndexMap.end()) { + return nullptr; + } + return GetLayerData(it->second); +} + +WebRenderLayerScrollData* TestWRScrollData::operator[](size_t aLayerIndex) { + auto it = mIndexMap.find(aLayerIndex); + if (it == mIndexMap.end()) { + return nullptr; + } + return GetLayerData(it->second); +} + +void TestWRScrollData::SetScrollMetadata( + size_t aLayerIndex, const nsTArray<ScrollMetadata>& aMetadata) { + WebRenderLayerScrollData* layer = operator[](aLayerIndex); + MOZ_ASSERT(layer); + for (const ScrollMetadata& metadata : aMetadata) { + layer->AppendScrollMetadata(*this, metadata); + } +} + +class WebRenderScrollDataWrapperTester : public ::testing::Test { + protected: + virtual void SetUp() { + // This ensures ScrollMetadata::sNullMetadata is initialized. + gfxPlatform::GetPlatform(); + + mManager = new APZCTreeManager(LayersId{0}); + mUpdater = new APZUpdater(mManager, false); + } + + RefPtr<APZCTreeManager> mManager; + RefPtr<APZUpdater> mUpdater; +}; + +TEST_F(WebRenderScrollDataWrapperTester, SimpleTree) { + auto layers = TestWRScrollData::Create("x(x(x(xx)x(x)))", *mUpdater); + WebRenderScrollDataWrapper w0(*mUpdater, &layers); + + ASSERT_EQ(layers[0], w0.GetLayer()); + WebRenderScrollDataWrapper w1 = w0.GetLastChild(); + ASSERT_EQ(layers[1], w1.GetLayer()); + ASSERT_FALSE(w1.GetPrevSibling().IsValid()); + WebRenderScrollDataWrapper w5 = w1.GetLastChild(); + ASSERT_EQ(layers[5], w5.GetLayer()); + WebRenderScrollDataWrapper w6 = w5.GetLastChild(); + ASSERT_EQ(layers[6], w6.GetLayer()); + ASSERT_FALSE(w6.GetLastChild().IsValid()); + WebRenderScrollDataWrapper w2 = w5.GetPrevSibling(); + ASSERT_EQ(layers[2], w2.GetLayer()); + ASSERT_FALSE(w2.GetPrevSibling().IsValid()); + WebRenderScrollDataWrapper w4 = w2.GetLastChild(); + ASSERT_EQ(layers[4], w4.GetLayer()); + ASSERT_FALSE(w4.GetLastChild().IsValid()); + WebRenderScrollDataWrapper w3 = w4.GetPrevSibling(); + ASSERT_EQ(layers[3], w3.GetLayer()); + ASSERT_FALSE(w3.GetLastChild().IsValid()); + ASSERT_FALSE(w3.GetPrevSibling().IsValid()); +} + +static ScrollMetadata MakeMetadata(ScrollableLayerGuid::ViewID aId) { + ScrollMetadata metadata; + metadata.GetMetrics().SetScrollId(aId); + return metadata; +} + +TEST_F(WebRenderScrollDataWrapperTester, MultiFramemetricsTree) { + auto layers = TestWRScrollData::Create("x(x(x(xx)x(x)))", *mUpdater); + + nsTArray<ScrollMetadata> metadata; + metadata.InsertElementAt(0, + MakeMetadata(ScrollableLayerGuid::START_SCROLL_ID + + 0)); // topmost of root layer + metadata.InsertElementAt(0, + MakeMetadata(ScrollableLayerGuid::NULL_SCROLL_ID)); + metadata.InsertElementAt( + 0, MakeMetadata(ScrollableLayerGuid::START_SCROLL_ID + 1)); + metadata.InsertElementAt( + 0, MakeMetadata(ScrollableLayerGuid::START_SCROLL_ID + 2)); + metadata.InsertElementAt(0, + MakeMetadata(ScrollableLayerGuid::NULL_SCROLL_ID)); + metadata.InsertElementAt( + 0, MakeMetadata( + ScrollableLayerGuid::NULL_SCROLL_ID)); // bottom of root layer + layers.SetScrollMetadata(0, metadata); + + metadata.Clear(); + metadata.InsertElementAt( + 0, MakeMetadata(ScrollableLayerGuid::START_SCROLL_ID + 3)); + layers.SetScrollMetadata(1, metadata); + + metadata.Clear(); + metadata.InsertElementAt( + 0, MakeMetadata(ScrollableLayerGuid::START_SCROLL_ID + 4)); + layers.SetScrollMetadata(2, metadata); + + metadata.Clear(); + metadata.InsertElementAt( + 0, MakeMetadata(ScrollableLayerGuid::START_SCROLL_ID + 5)); + layers.SetScrollMetadata(4, metadata); + + metadata.Clear(); + metadata.InsertElementAt(0, + MakeMetadata(ScrollableLayerGuid::NULL_SCROLL_ID)); + metadata.InsertElementAt( + 0, MakeMetadata(ScrollableLayerGuid::START_SCROLL_ID + 6)); + layers.SetScrollMetadata(5, metadata); + + WebRenderScrollDataWrapper wrapper(*mUpdater, &layers); + nsTArray<WebRenderLayerScrollData*> expectedLayers; + expectedLayers.AppendElement(layers[0]); + expectedLayers.AppendElement(layers[0]); + expectedLayers.AppendElement(layers[0]); + expectedLayers.AppendElement(layers[0]); + expectedLayers.AppendElement(layers[0]); + expectedLayers.AppendElement(layers[0]); + expectedLayers.AppendElement(layers[1]); + expectedLayers.AppendElement(layers[5]); + expectedLayers.AppendElement(layers[5]); + expectedLayers.AppendElement(layers[6]); + nsTArray<ScrollableLayerGuid::ViewID> expectedIds; + expectedIds.AppendElement(ScrollableLayerGuid::START_SCROLL_ID + 0); + expectedIds.AppendElement(ScrollableLayerGuid::NULL_SCROLL_ID); + expectedIds.AppendElement(ScrollableLayerGuid::START_SCROLL_ID + 1); + expectedIds.AppendElement(ScrollableLayerGuid::START_SCROLL_ID + 2); + expectedIds.AppendElement(ScrollableLayerGuid::NULL_SCROLL_ID); + expectedIds.AppendElement(ScrollableLayerGuid::NULL_SCROLL_ID); + expectedIds.AppendElement(ScrollableLayerGuid::START_SCROLL_ID + 3); + expectedIds.AppendElement(ScrollableLayerGuid::NULL_SCROLL_ID); + expectedIds.AppendElement(ScrollableLayerGuid::START_SCROLL_ID + 6); + expectedIds.AppendElement(ScrollableLayerGuid::NULL_SCROLL_ID); + for (int i = 0; i < 10; i++) { + ASSERT_EQ(expectedLayers[i], wrapper.GetLayer()); + ASSERT_EQ(expectedIds[i], wrapper.Metrics().GetScrollId()); + wrapper = wrapper.GetLastChild(); + } + ASSERT_FALSE(wrapper.IsValid()); +} |