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
|
/* 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/. */
"use strict";
const { assert, reportException } = require("devtools/shared/DevToolsUtils");
const { actions, diffingState, viewState } = require("../constants");
const telemetry = require("../telemetry");
const {
getSnapshot,
censusIsUpToDate,
snapshotIsDiffable,
findSelectedSnapshot,
} = require("../utils");
// This is a circular dependency, so do not destructure the needed properties.
const snapshotActions = require("./snapshot");
/**
* Toggle diffing mode on or off.
*/
const toggleDiffing = exports.toggleDiffing = function () {
return function (dispatch, getState) {
dispatch({
type: actions.CHANGE_VIEW,
newViewState: getState().diffing ? viewState.CENSUS : viewState.DIFFING,
oldDiffing: getState().diffing,
oldSelected: findSelectedSnapshot(getState()),
});
};
};
/**
* Select the given snapshot for diffing.
*
* @param {snapshotModel} snapshot
*/
const selectSnapshotForDiffing = exports.selectSnapshotForDiffing = function (snapshot) {
assert(snapshotIsDiffable(snapshot),
"To select a snapshot for diffing, it must be diffable");
return { type: actions.SELECT_SNAPSHOT_FOR_DIFFING, snapshot };
};
/**
* Compute the difference between the first and second snapshots.
*
* @param {HeapAnalysesClient} heapWorker
* @param {snapshotModel} first
* @param {snapshotModel} second
*/
const takeCensusDiff = exports.takeCensusDiff = function (heapWorker, first, second) {
return function* (dispatch, getState) {
assert(snapshotIsDiffable(first),
`First snapshot must be in a diffable state, found ${first.state}`);
assert(snapshotIsDiffable(second),
`Second snapshot must be in a diffable state, found ${second.state}`);
let report, parentMap;
let display = getState().censusDisplay;
let filter = getState().filter;
if (censusIsUpToDate(filter, display, getState().diffing.census)) {
return;
}
do {
if (!getState().diffing
|| getState().diffing.firstSnapshotId !== first.id
|| getState().diffing.secondSnapshotId !== second.id) {
// If we stopped diffing or stopped and then started diffing a different
// pair of snapshots, then just give up with diffing this pair. In the
// latter case, a newly spawned task will handle the diffing for the new
// pair.
return;
}
display = getState().censusDisplay;
filter = getState().filter;
dispatch({
type: actions.TAKE_CENSUS_DIFF_START,
first,
second,
filter,
display,
});
let opts = display.inverted
? { asInvertedTreeNode: true }
: { asTreeNode: true };
opts.filter = filter || null;
try {
({ delta: report, parentMap } = yield heapWorker.takeCensusDiff(
first.path,
second.path,
{ breakdown: display.breakdown },
opts));
} catch (error) {
reportException("actions/diffing/takeCensusDiff", error);
dispatch({ type: actions.DIFFING_ERROR, error });
return;
}
}
while (filter !== getState().filter
|| display !== getState().censusDisplay);
dispatch({
type: actions.TAKE_CENSUS_DIFF_END,
first,
second,
report,
parentMap,
filter,
display,
});
telemetry.countDiff({ filter, display });
};
};
/**
* Ensure that the current diffing data is up to date with the currently
* selected display, filter, etc. If the state is not up-to-date, then a
* recompute is triggered.
*
* @param {HeapAnalysesClient} heapWorker
*/
const refreshDiffing = exports.refreshDiffing = function (heapWorker) {
return function* (dispatch, getState) {
if (getState().diffing.secondSnapshotId === null) {
return;
}
assert(getState().diffing.firstSnapshotId,
"Should have first snapshot id");
if (getState().diffing.state === diffingState.TAKING_DIFF) {
// There is an existing task that will ensure that the diffing data is
// up-to-date.
return;
}
const { firstSnapshotId, secondSnapshotId } = getState().diffing;
const first = getSnapshot(getState(), firstSnapshotId);
const second = getSnapshot(getState(), secondSnapshotId);
dispatch(takeCensusDiff(heapWorker, first, second));
};
};
/**
* Select the given snapshot for diffing and refresh the diffing data if
* necessary (for example, if two snapshots are now selected for diffing).
*
* @param {HeapAnalysesClient} heapWorker
* @param {snapshotModel} snapshot
*/
const selectSnapshotForDiffingAndRefresh = exports.selectSnapshotForDiffingAndRefresh = function (heapWorker, snapshot) {
return function* (dispatch, getState) {
assert(getState().diffing,
"If we are selecting for diffing, we must be in diffing mode");
dispatch(selectSnapshotForDiffing(snapshot));
yield dispatch(refreshDiffing(heapWorker));
};
};
/**
* Expand the given node in the diffing's census's delta-report.
*
* @param {CensusTreeNode} node
*/
const expandDiffingCensusNode = exports.expandDiffingCensusNode = function (node) {
return {
type: actions.EXPAND_DIFFING_CENSUS_NODE,
node,
};
};
/**
* Collapse the given node in the diffing's census's delta-report.
*
* @param {CensusTreeNode} node
*/
const collapseDiffingCensusNode = exports.collapseDiffingCensusNode = function (node) {
return {
type: actions.COLLAPSE_DIFFING_CENSUS_NODE,
node,
};
};
/**
* Focus the given node in the snapshot's census's report.
*
* @param {DominatorTreeNode} node
*/
const focusDiffingCensusNode = exports.focusDiffingCensusNode = function (node) {
return {
type: actions.FOCUS_DIFFING_CENSUS_NODE,
node,
};
};
|
