Bug 1205983 - Remove all observer code from nsEditor. r=ehsan

editor/composer/nsEditorSpellCheck.cpp

@@ -636,13 +636,6 @@ nsEditorSpellCheck::SetCurrentDictionary(const nsAString& aDictionary)
   return mSpellChecker->SetCurrentDictionary(aDictionary);
 }
 
-NS_IMETHODIMP
-nsEditorSpellCheck::CheckCurrentDictionary()
-{
-  mSpellChecker->CheckCurrentDictionary();
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 nsEditorSpellCheck::UninitSpellChecker()
 {

editor/libeditor/nsEditor.cpp

@@ -24,7 +24,6 @@
 #include "PlaceholderTxn.h"             // for PlaceholderTxn
 #include "SplitNodeTxn.h"               // for SplitNodeTxn
 #include "mozFlushType.h"               // for mozFlushType::Flush_Frames
-#include "mozISpellCheckingEngine.h"
 #include "mozInlineSpellChecker.h"      // for mozInlineSpellChecker
 #include "mozilla/CheckedInt.h"         // for CheckedInt
 #include "mozilla/IMEStateManager.h"    // for IMEStateManager
@@ -79,7 +78,6 @@
 #include "nsIInlineSpellChecker.h"      // for nsIInlineSpellChecker, etc
 #include "nsNameSpaceManager.h"        // for kNameSpaceID_None, etc
 #include "nsINode.h"                    // for nsINode, etc
-#include "nsIObserverService.h"         // for nsIObserverService
 #include "nsIPlaintextEditor.h"         // for nsIPlaintextEditor, etc
 #include "nsIPresShell.h"               // for nsIPresShell
 #include "nsISelectionController.h"     // for nsISelectionController, etc
@@ -148,7 +146,6 @@ nsEditor::nsEditor()
 ,  mDispatchInputEvent(true)
 ,  mIsInEditAction(false)
 ,  mHidingCaret(false)
-,  mObservingDictionaryUpdates(false)
 {
 }
 
@@ -204,7 +201,6 @@ NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsEditor)
  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
  NS_INTERFACE_MAP_ENTRY(nsIEditorIMESupport)
  NS_INTERFACE_MAP_ENTRY(nsIEditor)
- NS_INTERFACE_MAP_ENTRY(nsIObserver)
  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIEditor)
 NS_INTERFACE_MAP_END
 
@@ -304,13 +300,6 @@ nsEditor::PostCreate()
     // update the UI with our state
     NotifyDocumentListeners(eDocumentCreated);
     NotifyDocumentListeners(eDocumentStateChanged);
-
-    nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
-    if (obs) {
-      obs->AddObserver(this,
-                       SPELLCHECK_DICTIONARY_REMOVE_NOTIFICATION,
-                       false);
-    }
   }
 
   // update nsTextStateManager and caret if we have focus
@@ -448,14 +437,6 @@ nsEditor::PreDestroy(bool aDestroyingFrames)
 
   IMEStateManager::OnEditorDestroying(this);
 
-  nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
-  if (obs) {
-    obs->RemoveObserver(this,
-                        SPELLCHECK_DICTIONARY_UPDATE_NOTIFICATION);
-    obs->RemoveObserver(this,
-                        SPELLCHECK_DICTIONARY_REMOVE_NOTIFICATION);
-  }
-
   // Let spellchecker clean up its observers etc. It is important not to
   // actually free the spellchecker here, since the spellchecker could have
   // caused flush notifications, which could have gotten here if a textbox
@@ -1314,35 +1295,6 @@ NS_IMETHODIMP nsEditor::GetInlineSpellChecker(bool autoCreate,
   return NS_OK;
 }
 
-NS_IMETHODIMP nsEditor::Observe(nsISupports* aSubj, const char *aTopic,
-                                const char16_t *aData)
-{
-  NS_ASSERTION(!strcmp(aTopic,
-                       SPELLCHECK_DICTIONARY_UPDATE_NOTIFICATION) ||
-               !strcmp(aTopic,
-                       SPELLCHECK_DICTIONARY_REMOVE_NOTIFICATION),
-               "Unexpected observer topic");
-
-  // When mozInlineSpellChecker::CanEnableInlineSpellChecking changes
-  SyncRealTimeSpell();
-
-  // When nsIEditorSpellCheck::GetCurrentDictionary changes
-  if (mInlineSpellChecker) {
-    // Do the right thing in the spellchecker, if the dictionary is no longer
-    // available. This will not set a new dictionary.
-    nsCOMPtr<nsIEditorSpellCheck> editorSpellCheck;
-    mInlineSpellChecker->GetSpellChecker(getter_AddRefs(editorSpellCheck));
-    if (editorSpellCheck) {
-      editorSpellCheck->CheckCurrentDictionary();
-    }
-
-    // update the inline spell checker to reflect the new current dictionary
-    mInlineSpellChecker->SpellCheckRange(nullptr); // causes recheck
-  }
-
-  return NS_OK;
-}
-
 NS_IMETHODIMP nsEditor::SyncRealTimeSpell()
 {
   bool enable = GetDesiredSpellCheckState();
@@ -5206,29 +5158,6 @@ nsEditor::OnFocus(nsIDOMEventTarget* aFocusEventTarget)
   }
 }
 
-void
-nsEditor::StartWatchingDictionaryChanges()
-{
-  if (!mObservingDictionaryUpdates) {
-    nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
-    if (obs) {
-      obs->AddObserver(this, SPELLCHECK_DICTIONARY_UPDATE_NOTIFICATION, false);
-    }
-    mObservingDictionaryUpdates = true;
-  }
-}
-
-void
-nsEditor::StopWatchingDictionaryChanges()
-{
-  // Removing an observer that wasn't added doesn't cause any harm.
-  nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
-  if (obs) {
-    obs->RemoveObserver(this, SPELLCHECK_DICTIONARY_UPDATE_NOTIFICATION);
-  }
-  mObservingDictionaryUpdates = false;
-}
-
 NS_IMETHODIMP
 nsEditor::GetSuppressDispatchingInputEvent(bool *aSuppressed)
 {

editor/libeditor/nsEditor.h

@@ -140,7 +140,6 @@ inline bool operator!(const EditAction& aOp)
 class nsEditor : public nsIEditor,
                  public nsIEditorIMESupport,
                  public nsSupportsWeakReference,
-                 public nsIObserver,
                  public nsIPhonetic
 {
 public:
@@ -188,9 +187,6 @@ public:
   /* ------------ nsIEditorIMESupport methods -------------- */
   NS_DECL_NSIEDITORIMESUPPORT
 
-  /* ------------ nsIObserver methods -------------- */
-  NS_DECL_NSIOBSERVER
-
   // nsIPhonetic
   NS_DECL_NSIPHONETIC
 
@@ -249,9 +245,6 @@ public:
 
   void SwitchTextDirectionTo(uint32_t aDirection);
 
-  void StartWatchingDictionaryChanges();
-  void StopWatchingDictionaryChanges();
-
 protected:
   nsresult DetermineCurrentDirection();
   void FireInputEvent();
@@ -894,7 +887,6 @@ protected:
   bool mDispatchInputEvent;
   bool mIsInEditAction;   // true while the instance is handling an edit action
   bool mHidingCaret;      // whether caret is hidden forcibly.
-  bool mObservingDictionaryUpdates;  // whether the editor is observing dictionary changes.
 
   friend bool NSCanUnload(nsISupports* serviceMgr);
   friend class nsAutoTxnsConserveSelection;

editor/libeditor/nsEditorEventListener.cpp

@@ -1114,8 +1114,6 @@ nsEditorEventListener::Focus(nsIDOMEvent* aEvent)
     }
   }
 
-  mEditor->StartWatchingDictionaryChanges();
-
   mEditor->OnFocus(target);
 
   nsCOMPtr<nsIPresShell> ps = GetPresShell();
@@ -1132,8 +1130,6 @@ nsEditorEventListener::Blur(nsIDOMEvent* aEvent)
 {
   NS_ENSURE_TRUE(aEvent, NS_OK);
 
-  mEditor->StopWatchingDictionaryChanges();
-
   // check if something else is focused. If another element is focused, then
   // we should not change the selection.
   nsIFocusManager* fm = nsFocusManager::GetFocusManager();

editor/nsIEditorSpellCheck.idl

@@ -9,16 +9,10 @@ interface nsIEditor;
 interface nsITextServicesFilter;
 interface nsIEditorSpellCheckCallback;
 
-[scriptable, uuid(dd32ef3b-a7d8-43d1-9617-5f2dddbe29eb)]
+[scriptable, uuid(a171c25f-e4a8-4d08-adef-b797e6377bdc)]
 interface nsIEditorSpellCheck : nsISupports
 {
 
-  /**
-   * Call this on any change in installed dictionaries to ensure that the spell
-   * checker is not using a current dictionary which is no longer available.
-   */
-  void checkCurrentDictionary();
-
  /**
    * Returns true if we can enable spellchecking. If there are no available
    * dictionaries, this will return false.

editor/txtsvc/nsISpellChecker.h

@@ -114,12 +114,6 @@ public:
    * empty string, spellchecker will be disabled.
    */
   NS_IMETHOD SetCurrentDictionary(const nsAString &aDictionary) = 0;
-
-  /**
-   * Call this on any change in installed dictionaries to ensure that the spell
-   * checker is not using a current dictionary which is no longer available.
-   */
-  NS_IMETHOD CheckCurrentDictionary() = 0;
 };
 
 NS_DEFINE_STATIC_IID_ACCESSOR(nsISpellChecker, NS_ISPELLCHECKER_IID)

extensions/spellcheck/hunspell/glue/mozHunspell.cpp

@@ -160,12 +160,6 @@ NS_IMETHODIMP mozHunspell::SetDictionary(const char16_t *aDictionary)
     mDecoder = nullptr;
     mEncoder = nullptr;
 
-    nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
-    if (obs) {
-      obs->NotifyObservers(nullptr,
-                           SPELLCHECK_DICTIONARY_UPDATE_NOTIFICATION,
-                           nullptr);
-    }
     return NS_OK;
   }
 
@@ -226,13 +220,6 @@ NS_IMETHODIMP mozHunspell::SetDictionary(const char16_t *aDictionary)
   else
     mLanguage = Substring(mDictionary, 0, pos);
 
-  nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
-  if (obs) {
-    obs->NotifyObservers(nullptr,
-                         SPELLCHECK_DICTIONARY_UPDATE_NOTIFICATION,
-                         nullptr);
-  }
-
   return NS_OK;
 }
 
@@ -604,11 +591,19 @@ NS_IMETHODIMP mozHunspell::RemoveDirectory(nsIFile *aDir)
 {
   mDynamicDirectories.RemoveObject(aDir);
   LoadDictionaryList(true);
+
+#ifdef MOZ_THUNDERBIRD
+  /*
+   * This notification is needed for Thunderbird. Thunderbird derives the dictionary
+   * from the document's "lang" attribute. If a dictionary is removed,
+   * we need to change the "lang" attribute.
+   */
   nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
   if (obs) {
     obs->NotifyObservers(nullptr,
                          SPELLCHECK_DICTIONARY_REMOVE_NOTIFICATION,
                          nullptr);
   }
+#endif
   return NS_OK;
 }

extensions/spellcheck/idl/mozISpellCheckingEngine.idl

@@ -102,8 +102,6 @@ interface mozISpellCheckingEngine : nsISupports {
 #define DICTIONARY_SEARCH_DIRECTORY "DictD"
 #define DICTIONARY_SEARCH_DIRECTORY_LIST "DictDL"
 
-#define SPELLCHECK_DICTIONARY_UPDATE_NOTIFICATION \
-  "spellcheck-dictionary-update"
 #define SPELLCHECK_DICTIONARY_REMOVE_NOTIFICATION \
   "spellcheck-dictionary-remove"
 %}

extensions/spellcheck/src/mozInlineSpellChecker.cpp

@@ -2021,10 +2021,8 @@ nsresult mozInlineSpellChecker::CurrentDictionaryUpdated()
     currentDictionary.Truncate();
   }
 
-  if (!mPreviousDictionary.Equals(currentDictionary)) {
   nsresult rv = SpellCheckRange(nullptr);
   NS_ENSURE_SUCCESS(rv, rv);
-  }
 
   return NS_OK;
 }

extensions/spellcheck/src/mozSpellChecker.cpp

@@ -428,31 +428,6 @@ mozSpellChecker::SetCurrentDictionary(const nsAString &aDictionary)
   return NS_ERROR_NOT_AVAILABLE;
 }
 
-NS_IMETHODIMP 
-mozSpellChecker::CheckCurrentDictionary()
-{
-  // If the current dictionary has been uninstalled, we need to stop using it.
-  // This happens when there is a current engine, but that engine has no
-  // current dictionary.
-
-  if (!mSpellCheckingEngine) {
-    // We didn't have a current dictionary
-    return NS_OK;
-  }
-
-  nsXPIDLString dictname;
-  mSpellCheckingEngine->GetDictionary(getter_Copies(dictname));
-
-  if (!dictname.IsEmpty()) {
-    // We still have a current dictionary
-    return NS_OK;
-  }
-
-  // We had a current dictionary, but it has gone, so we cannot use it anymore.
-  mSpellCheckingEngine = nullptr;
-  return NS_OK;
-}
-
 nsresult
 mozSpellChecker::SetupDoc(int32_t *outBlockOffset)
 {

extensions/spellcheck/src/mozSpellChecker.h

@@ -48,7 +48,6 @@ public:
   NS_IMETHOD GetDictionaryList(nsTArray<nsString> *aDictionaryList) override;
   NS_IMETHOD GetCurrentDictionary(nsAString &aDictionary) override;
   NS_IMETHOD SetCurrentDictionary(const nsAString &aDictionary) override;
-  NS_IMETHOD CheckCurrentDictionary() override;
 
   void DeleteRemoteEngine() {
     mEngine = nullptr;