1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
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 LayerIntRect* aVisibleRects,
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 (aVisibleRects) {
layer.SetVisibleRect(aVisibleRects[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 = APZCTreeManager::Create(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());
}
|
