Bug 1772718 - Reduce mozilla/reject-scriptableunicodeconverter eslint warnings in DevTools code r=nchevobbe

Differential Revision: https://phabricator.services.mozilla.com/D148346

devtools/client/shared/test/shared-head.js

@@ -1997,3 +1997,13 @@ async function closeRDM(tab, options) {
   await manager.closeIfNeeded(tab.ownerGlobal, tab, options);
   info("Responsive design mode closed");
 }
+
+function getInputStream(data) {
+  const BufferStream = CC(
+    "@mozilla.org/io/arraybuffer-input-stream;1",
+    "nsIArrayBufferInputStream",
+    "setData"
+  );
+  const buffer = new TextEncoder().encode(data).buffer;
+  return new BufferStream(buffer, 0, buffer.byteLength);
+}

devtools/client/styleeditor/StyleSheetEditor.jsm

@@ -20,6 +20,16 @@ const EventEmitter = require("devtools/shared/event-emitter");
 
 const lazy = {};
 
+loader.lazyGetter(lazy, "BufferStream", () => {
+  const { CC } = require("chrome");
+
+  return CC(
+    "@mozilla.org/io/arraybuffer-input-stream;1",
+    "nsIArrayBufferInputStream",
+    "setData"
+  );
+});
+
 loader.lazyRequireGetter(
   lazy,
   "FileUtils",
@@ -752,11 +762,8 @@ StyleSheetEditor.prototype = {
       }
 
       const ostream = lazy.FileUtils.openSafeFileOutputStream(returnFile);
-      const converter = Cc[
+      const buffer = new TextEncoder().encode(this._state.text).buffer;
-        "@mozilla.org/intl/scriptableunicodeconverter"
+      const istream = new lazy.BufferStream(buffer, 0, buffer.byteLength);
-      ].createInstance(Ci.nsIScriptableUnicodeConverter);
-      converter.charset = "UTF-8";
-      const istream = converter.convertToInputStream(this._state.text);
 
       lazy.NetUtil.asyncCopy(istream, ostream, status => {
         if (!Components.isSuccessCode(status)) {

devtools/client/styleeditor/test/browser_styleeditor_filesave.js

@@ -81,13 +81,7 @@ function read(srcChromeURL) {
 }
 
 function write(data, file, callback) {
-  const converter = Cc[
+  const istream = getInputStream(data);
-    "@mozilla.org/intl/scriptableunicodeconverter"
-  ].createInstance(Ci.nsIScriptableUnicodeConverter);
-
-  converter.charset = "UTF-8";
-
-  const istream = converter.convertToInputStream(data);
   const ostream = FileUtils.openSafeFileOutputStream(file);
 
   NetUtil.asyncCopy(istream, ostream, function(status) {

devtools/client/styleeditor/test/browser_styleeditor_import.js

@@ -39,11 +39,8 @@ function importSheet(ui, panelWindow) {
   // create file to import first
   const file = FileUtils.getFile("ProfD", [FILENAME]);
   const ostream = FileUtils.openSafeFileOutputStream(file);
-  const converter = Cc[
+  const istream = getInputStream(SOURCE);
-    "@mozilla.org/intl/scriptableunicodeconverter"
+
-  ].createInstance(Ci.nsIScriptableUnicodeConverter);
-  converter.charset = "UTF-8";
-  const istream = converter.convertToInputStream(SOURCE);
   NetUtil.asyncCopy(istream, ostream, function() {
     FileUtils.closeSafeFileOutputStream(ostream);
 

devtools/client/styleeditor/test/browser_styleeditor_sourcemap_watching.js

@@ -145,13 +145,7 @@ function read(srcChromeURL) {
 
 function write(data, file) {
   return new Promise(resolve => {
-    const converter = Cc[
+    const istream = getInputStream(data);
-      "@mozilla.org/intl/scriptableunicodeconverter"
-    ].createInstance(Ci.nsIScriptableUnicodeConverter);
-
-    converter.charset = "UTF-8";
-
-    const istream = converter.convertToInputStream(data);
     const ostream = FileUtils.openSafeFileOutputStream(file);
 
     NetUtil.asyncCopy(istream, ostream, function(status) {

devtools/client/webconsole/test/browser/browser_jsterm_file_load_save_keyboard_shortcut.js

@@ -74,17 +74,8 @@ async function createLocalFile() {
   return file;
 }
 
-function getUnicodeConverter() {
-  const className = "@mozilla.org/intl/scriptableunicodeconverter";
-  const converter = Cc[className].createInstance(
-    Ci.nsIScriptableUnicodeConverter
-  );
-  converter.charset = "UTF-8";
-  return converter;
-}
-
 function writeInFile(string, file) {
-  const inputStream = getUnicodeConverter().convertToInputStream(string);
+  const inputStream = getInputStream(string);
   const outputStream = FileUtils.openSafeFileOutputStream(file);
 
   return new Promise((resolve, reject) => {

devtools/shared/discovery/discovery.js

@@ -46,16 +46,6 @@ const UPDATE_PORT = 50625;
 const ADDRESS = "224.0.0.115";
 const REPLY_TIMEOUT = 5000;
 
-const { XPCOMUtils } = require("resource://gre/modules/XPCOMUtils.jsm");
-
-XPCOMUtils.defineLazyGetter(this, "converter", () => {
-  const conv = Cc[
-    "@mozilla.org/intl/scriptableunicodeconverter"
-  ].createInstance(Ci.nsIScriptableUnicodeConverter);
-  conv.charset = "utf8";
-  return conv;
-});
-
 var logging = Services.prefs.getBoolPref("devtools.discovery.log");
 function log(msg) {
   if (logging) {
@@ -96,7 +86,7 @@ Transport.prototype = {
       log("Send to " + port + ":\n" + JSON.stringify(object, null, 2));
     }
     const message = JSON.stringify(object);
-    const rawMessage = converter.convertToByteArray(message);
+    const rawMessage = Uint8Array.from(message, x => x.charCodeAt(0));
     try {
       this.socket.send(ADDRESS, port, rawMessage, rawMessage.length);
     } catch (e) {

devtools/shared/webconsole/network-helper.js

@@ -123,6 +123,9 @@ var NetworkHelper = {
    *          Converted text.
    */
   convertToUnicode: function(text, charset) {
+    // FIXME: We need to throw when text can't be converted e.g. the contents of
+    // an image. Until we have a way to do so with TextEncoder and TextDecoder
+    // we need to use nsIScriptableUnicodeConverter instead.
     const conv = Cc[
       "@mozilla.org/intl/scriptableunicodeconverter"
     ].createInstance(Ci.nsIScriptableUnicodeConverter);

devtools/shared/webconsole/test/chrome/test_file_uri.html

@@ -33,12 +33,12 @@ function doFileActivity()
   const fout = FileUtils.openSafeFileOutputStream(gTmpFile,
     FileUtils.MODE_WRONLY | FileUtils.MODE_CREATE | FileUtils.MODE_TRUNCATE);
 
-  const converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].
+  const stream = Cc[
-                  createInstance(Ci.nsIScriptableUnicodeConverter);
+    "@mozilla.org/io/arraybuffer-input-stream;1"
-  converter.charset = "UTF-8";
+  ].createInstance(Ci.nsIArrayBufferInputStream);
-  const fileContentStream = converter.convertToInputStream(fileContent);
+  const buffer = new TextEncoder().encode(fileContent).buffer;
-
+  stream.setData(buffer, 0, buffer.byteLength);
-  NetUtil.asyncCopy(fileContentStream, fout, addIframe);
+  NetUtil.asyncCopy(stream, fout, addIframe);
 }
 
 function addIframe(aStatus)