1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "src/trace_processor/analysis/describe_slice.h"
18
19 namespace perfetto {
20 namespace trace_processor {
21
DescribeSlice(const tables::SliceTable & table,tables::SliceTable::Id id,base::Optional<SliceDescription> * description)22 util::Status DescribeSlice(const tables::SliceTable& table,
23 tables::SliceTable::Id id,
24 base::Optional<SliceDescription>* description) {
25 auto opt_row = table.id().IndexOf(id);
26 if (!opt_row)
27 return util::ErrStatus("Unable to find slice id");
28
29 uint32_t row = *opt_row;
30
31 base::StringView name = table.name().GetString(row);
32 if (name == "inflate") {
33 *description = SliceDescription{
34 "Constructing a View hierarchy from pre-processed XML via "
35 "LayoutInflater#layout. This includes constructing all of the View "
36 "objects in the hierarchy, and applying styled attributes.",
37 ""};
38 return util::OkStatus();
39 }
40
41 if (name == "measure") {
42 *description = SliceDescription{
43 "First of two phases in view hierarchy layout. Views are asked to size "
44 "themselves according to constraints supplied by their parent. Some "
45 "ViewGroups may measure a child more than once to help satisfy their "
46 "own constraints. Nesting ViewGroups that measure children more than "
47 "once can lead to excessive and repeated work.",
48 "https://developer.android.com/reference/android/view/"
49 "View.html#Layout"};
50 return util::OkStatus();
51 }
52
53 *description = base::nullopt;
54 return util::OkStatus();
55 }
56
57 } // namespace trace_processor
58 } // namespace perfetto
59