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-rw-r--r--ext/bg/js/text-source-map.js22
1 files changed, 13 insertions, 9 deletions
diff --git a/ext/bg/js/text-source-map.js b/ext/bg/js/text-source-map.js
index 1776ae07..6ed553e6 100644
--- a/ext/bg/js/text-source-map.js
+++ b/ext/bg/js/text-source-map.js
@@ -18,7 +18,7 @@
class TextSourceMap {
constructor(source, mapping=null) {
this._source = source;
- this._mapping = (Array.isArray(mapping) ? TextSourceMap._normalizeMapping(mapping) : null);
+ this._mapping = (mapping !== null ? TextSourceMap.normalizeMapping(mapping) : null);
}
get source() {
@@ -31,19 +31,19 @@ class TextSourceMap {
}
const source = this._source;
- if (!(other instanceof TextSourceMap && source === other._source)) {
+ if (!(other instanceof TextSourceMap && source === other.source)) {
return false;
}
let mapping = this._mapping;
- let otherMapping = other._mapping;
+ let otherMapping = other.getMappingCopy();
if (mapping === null) {
if (otherMapping === null) {
return true;
}
- mapping = TextSourceMap._createMapping(source);
+ mapping = TextSourceMap.createMapping(source);
} else if (otherMapping === null) {
- otherMapping = TextSourceMap._createMapping(source);
+ otherMapping = TextSourceMap.createMapping(source);
}
const mappingLength = mapping.length;
@@ -77,7 +77,7 @@ class TextSourceMap {
if (count <= 0) { return; }
if (this._mapping === null) {
- this._mapping = TextSourceMap._createMapping(this._source);
+ this._mapping = TextSourceMap.createMapping(this._source);
}
let sum = this._mapping[index];
@@ -90,17 +90,21 @@ class TextSourceMap {
insert(index, ...items) {
if (this._mapping === null) {
- this._mapping = TextSourceMap._createMapping(this._source);
+ this._mapping = TextSourceMap.createMapping(this._source);
}
this._mapping.splice(index, 0, ...items);
}
- static _createMapping(text) {
+ getMappingCopy() {
+ return this._mapping !== null ? [...this._mapping] : null;
+ }
+
+ static createMapping(text) {
return new Array(text.length).fill(1);
}
- static _normalizeMapping(mapping) {
+ static normalizeMapping(mapping) {
const result = [];
for (const value of mapping) {
result.push(