forked from firefox-devtools/debugger
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathpreview.js
More file actions
174 lines (143 loc) · 4.54 KB
/
preview.js
File metadata and controls
174 lines (143 loc) · 4.54 KB
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
/* 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/>. */
// @flow
import { isConsole } from "../utils/preview";
import { findBestMatchExpression } from "../utils/ast";
import { getTokenLocation } from "../utils/editor";
import { isGeneratedId } from "devtools-source-map";
import { PROMISE } from "./utils/middleware/promise";
import { getExpressionFromCoords } from "../utils/editor/get-expression";
import {
getPreview,
isLineInScope,
isSelectedFrameVisible,
getSelectedSource,
getSelectedFrame,
getSymbols,
getCanRewind
} from "../selectors";
import { getMappedExpression } from "./expressions";
import { getExtra } from "./pause";
import { isEqual } from "lodash";
import type { Action, ThunkArgs } from "./types";
import type { ColumnPosition } from "../types";
import type { AstLocation } from "../workers/parser";
function isInvalidTarget(target: HTMLElement) {
if (!target || !target.innerText) {
return true;
}
const tokenText = target.innerText.trim();
const cursorPos = target.getBoundingClientRect();
// exclude literal tokens where it does not make sense to show a preview
const invalidType = ["cm-atom", ""].includes(target.className);
// exclude syntax where the expression would be a syntax error
const invalidToken =
tokenText === "" || tokenText.match(/^[(){}\|&%,.;=<>\+-/\*\s](?=)/);
// exclude codemirror elements that are not tokens
const invalidTarget =
(target.parentElement &&
!target.parentElement.closest(".CodeMirror-line")) ||
cursorPos.top == 0;
return invalidTarget || invalidToken || invalidType;
}
export function updatePreview(target: HTMLElement, editor: any) {
return ({ dispatch, getState, client, sourceMaps }: ThunkArgs) => {
const tokenPos = getTokenLocation(editor.codeMirror, target);
const cursorPos = target.getBoundingClientRect();
const preview = getPreview(getState());
if (getCanRewind(getState())) {
return;
}
if (preview) {
// Return early if we are currently showing another preview or
// if we are mousing over the same token as before
if (preview.updating || isEqual(preview.tokenPos, tokenPos)) {
return;
}
// We are mousing over a new token that is not in the preview
if (!target.classList.contains("debug-expression")) {
dispatch(clearPreview());
}
}
if (isInvalidTarget(target)) {
return;
}
if (
!isSelectedFrameVisible(getState()) ||
!isLineInScope(getState(), tokenPos.line)
) {
return;
}
const source = getSelectedSource(getState());
const symbols = getSymbols(getState(), source);
let match;
if (!symbols || symbols.loading) {
match = getExpressionFromCoords(editor.codeMirror, tokenPos);
} else {
match = findBestMatchExpression(symbols, tokenPos);
}
if (!match) {
return;
}
const { expression, location } = match;
if (isConsole(expression)) {
return;
}
dispatch(setPreview(expression, location, tokenPos, cursorPos));
};
}
export function setPreview(
expression: string,
location: AstLocation,
tokenPos: ColumnPosition,
cursorPos: any
) {
return async ({ dispatch, getState, client, sourceMaps }: ThunkArgs) => {
await dispatch(
({
type: "SET_PREVIEW",
[PROMISE]: (async function() {
const source = getSelectedSource(getState());
const sourceId = source.id;
const selectedFrame = getSelectedFrame(getState());
if (location && !isGeneratedId(sourceId)) {
expression = await dispatch(getMappedExpression(expression));
}
if (!selectedFrame) {
return;
}
const { result } = await client.evaluateInFrame(
expression,
selectedFrame.id
);
if (result === undefined) {
return;
}
const extra = await dispatch(getExtra(expression, result));
return {
expression,
result,
location,
tokenPos,
cursorPos,
extra
};
})()
}: Action)
);
};
}
export function clearPreview() {
return ({ dispatch, getState, client }: ThunkArgs) => {
const currentSelection = getPreview(getState());
if (!currentSelection) {
return;
}
return dispatch(
({
type: "CLEAR_SELECTION"
}: Action)
);
};
}