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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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/. */
#ifndef mozilla_ComposerCommandsUpdater_h
#define mozilla_ComposerCommandsUpdater_h
#include "nsCOMPtr.h" // for already_AddRefed, nsCOMPtr
#include "nsCycleCollectionParticipant.h"
#include "nsINamed.h"
#include "nsISupportsImpl.h" // for NS_DECL_ISUPPORTS
#include "nsITimer.h" // for NS_DECL_NSITIMERCALLBACK, etc
#include "nscore.h" // for NS_IMETHOD, nsresult, etc
class nsCommandManager;
class nsIDocShell;
class nsITransaction;
class nsITransactionManager;
class nsPIDOMWindowOuter;
namespace mozilla {
class TransactionManager;
class ComposerCommandsUpdater final : public nsITimerCallback, public nsINamed {
public:
ComposerCommandsUpdater();
// nsISupports
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(ComposerCommandsUpdater,
nsITimerCallback)
// nsITimerCallback
NS_DECL_NSITIMERCALLBACK
// nsINamed
NS_DECL_NSINAMED
void Init(nsPIDOMWindowOuter& aDOMWindow);
/**
* OnSelectionChange() is called when selection is changed in the editor.
*/
void OnSelectionChange() { PrimeUpdateTimer(); }
/**
* OnHTMLEditorCreated() is called when `HTMLEditor` is created and
* initialized.
*/
MOZ_CAN_RUN_SCRIPT void OnHTMLEditorCreated() {
UpdateOneCommand("obs_documentCreated");
}
/**
* OnBeforeHTMLEditorDestroyed() is called when `HTMLEditor` is being
* destroyed.
*/
MOZ_CAN_RUN_SCRIPT void OnBeforeHTMLEditorDestroyed() {
// cancel any outstanding update timer
if (mUpdateTimer) {
mUpdateTimer->Cancel();
mUpdateTimer = nullptr;
}
// We can't notify the command manager of this right now; it is too late in
// some cases and the window is already partially destructed (e.g. JS
// objects may be gone).
}
/**
* OnHTMLEditorDirtyStateChanged() is called when dirty state of `HTMLEditor`
* is changed form or to "dirty".
*/
MOZ_CAN_RUN_SCRIPT void OnHTMLEditorDirtyStateChanged(bool aNowDirty) {
if (mDirtyState == static_cast<int8_t>(aNowDirty)) {
return;
}
UpdateCommandGroup(CommandGroup::Save);
UpdateCommandGroup(CommandGroup::Undo);
mDirtyState = aNowDirty;
}
/**
* The following methods are called when aTransactionManager did
* `DoTransaction`, `UndoTransaction` or `RedoTransaction` of a transaction
* instance.
*/
MOZ_CAN_RUN_SCRIPT void DidDoTransaction(
TransactionManager& aTransactionManager);
MOZ_CAN_RUN_SCRIPT void DidUndoTransaction(
TransactionManager& aTransactionManager);
MOZ_CAN_RUN_SCRIPT void DidRedoTransaction(
TransactionManager& aTransactionManager);
protected:
virtual ~ComposerCommandsUpdater();
enum {
eStateUninitialized = -1,
eStateOff = 0,
eStateOn = 1,
};
bool SelectionIsCollapsed();
MOZ_CAN_RUN_SCRIPT nsresult UpdateOneCommand(const char* aCommand);
enum class CommandGroup {
Save,
Style,
Undo,
};
MOZ_CAN_RUN_SCRIPT void UpdateCommandGroup(CommandGroup aCommandGroup);
nsCommandManager* GetCommandManager();
nsresult PrimeUpdateTimer();
void TimerCallback();
nsCOMPtr<nsITimer> mUpdateTimer;
nsCOMPtr<nsPIDOMWindowOuter> mDOMWindow;
nsCOMPtr<nsIDocShell> mDocShell;
int8_t mDirtyState;
int8_t mSelectionCollapsed;
bool mFirstDoOfFirstUndo;
};
} // namespace mozilla
#endif // #ifndef mozilla_ComposerCommandsUpdater_h
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