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-rw-r--r--devtools/shared/wasm-source-map.js114
1 files changed, 114 insertions, 0 deletions
diff --git a/devtools/shared/wasm-source-map.js b/devtools/shared/wasm-source-map.js
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+++ b/devtools/shared/wasm-source-map.js
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+/* 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";
+
+/**
+ * SourceMapConsumer for WebAssembly source maps. It transposes columns with
+ * lines, which allows mapping data to be used with SpiderMonkey Debugger API.
+ */
+class WasmRemap {
+ /**
+ * @param map SourceMapConsumer
+ */
+ constructor(map) {
+ this._map = map;
+ this.version = map.version;
+ this.file = map.file;
+ this._computeColumnSpans = false;
+ }
+
+ get sources() {
+ return this._map.sources;
+ }
+
+ get sourceRoot() {
+ return this._map.sourceRoot;
+ }
+
+ /**
+ * @param url string
+ */
+ set sourceRoot(url) {
+ // important, since sources are using this.
+ this._map.sourceRoot = url;
+ }
+
+ get names() {
+ return this._map.names;
+ }
+
+ get sourcesContent() {
+ return this._map.sourcesContent;
+ }
+
+ get mappings() {
+ throw new Error("not supported");
+ }
+
+ computeColumnSpans() {
+ this._computeColumnSpans = true;
+ }
+
+ originalPositionFor(generatedPosition) {
+ const result = this._map.originalPositionFor({
+ line: 1,
+ column: generatedPosition.line,
+ bias: generatedPosition.bias,
+ });
+ return result;
+ }
+
+ _remapGeneratedPosition(position) {
+ const generatedPosition = {
+ line: position.column,
+ column: 0,
+ };
+ if (this._computeColumnSpans) {
+ generatedPosition.lastColumn = Infinity;
+ }
+ return generatedPosition;
+ }
+
+ generatedPositionFor(originalPosition) {
+ const position = this._map.generatedPositionFor(originalPosition);
+ return this._remapGeneratedPosition(position);
+ }
+
+ allGeneratedPositionsFor(originalPosition) {
+ const positions = this._map.allGeneratedPositionsFor(originalPosition);
+ return positions.map(position => {
+ return this._remapGeneratedPosition(position);
+ });
+ }
+
+ hasContentsOfAllSources() {
+ return this._map.hasContentsOfAllSources();
+ }
+
+ sourceContentFor(source, returnNullOnMissing) {
+ return this._map.sourceContentFor(source, returnNullOnMissing);
+ }
+
+ eachMapping(callback, context, order) {
+ this._map.eachMapping(
+ entry => {
+ const { source, generatedColumn, originalLine, originalColumn, name } =
+ entry;
+ callback({
+ source,
+ generatedLine: generatedColumn,
+ generatedColumn: 0,
+ originalLine,
+ originalColumn,
+ name,
+ });
+ },
+ context,
+ order
+ );
+ }
+}
+
+exports.WasmRemap = WasmRemap;