Bug 1502661 - Part 1. Add async IPC to check word by spellchecker. r=masayuki

Actually we have no async IPC for spellchecker, so I would like to add async
IPC to check word.

When using full check, spellchecker requests a lot of words to check word. New
async IPC should allow multiple words per IPC to reduce IPC call.

Differential Revision: https://phabricator.services.mozilla.com/D14835

--HG--
extra : rebase_source : e54177c1779dc7e2e48c189a65cbc212b4aa519a

extensions/spellcheck/hunspell/glue/PRemoteSpellcheckEngine.ipdl

@@ -13,6 +13,7 @@ parent:
   async __delete__();
 
   sync Check(nsString aWord) returns (bool aIsMisspelled);
+  async CheckAsync(nsString[] aWord) returns (bool[] aIsMisspelled);
 
   sync CheckAndSuggest(nsString aWord) returns (bool aIsMisspelled, nsString[] aSuggestions);
 

extensions/spellcheck/hunspell/glue/RemoteSpellCheckEngineParent.cpp

@@ -45,6 +45,23 @@ mozilla::ipc::IPCResult RemoteSpellcheckEngineParent::RecvCheck(
   return IPC_OK();
 }
 
+mozilla::ipc::IPCResult RemoteSpellcheckEngineParent::RecvCheckAsync(
+    nsTArray<nsString>&& aWords, CheckAsyncResolver&& aResolve) {
+  nsTArray<bool> misspells;
+  misspells.SetCapacity(aWords.Length());
+  for (auto& word : aWords) {
+    bool misspelled;
+    nsresult rv = mSpellChecker->CheckWord(word, &misspelled, nullptr);
+    // If CheckWord failed, we can't tell whether the word is correctly spelled
+    if (NS_FAILED(rv)) {
+      misspelled = false;
+    }
+    misspells.AppendElement(misspelled);
+  }
+  aResolve(std::move(misspells));
+  return IPC_OK();
+}
+
 mozilla::ipc::IPCResult RemoteSpellcheckEngineParent::RecvCheckAndSuggest(
     const nsString& aWord, bool* aIsMisspelled,
     InfallibleTArray<nsString>* aSuggestions) {

extensions/spellcheck/hunspell/glue/RemoteSpellCheckEngineParent.h

@@ -30,6 +30,9 @@ class RemoteSpellcheckEngineParent : public PRemoteSpellcheckEngineParent {
   virtual mozilla::ipc::IPCResult RecvCheck(const nsString& aWord,
                                             bool* aIsMisspelled) override;
 
+  virtual mozilla::ipc::IPCResult RecvCheckAsync(
+      nsTArray<nsString>&& aWord, CheckAsyncResolver&& aResolve) override;
+
   virtual mozilla::ipc::IPCResult RecvCheckAndSuggest(
       const nsString& aWord, bool* aIsMisspelled,
       InfallibleTArray<nsString>* aSuggestions) override;