зеркало из https://github.com/mozilla/gecko-dev.git
396 строки
11 KiB
C++
396 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ComposerCommandsUpdater.h"
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#include "mozilla/mozalloc.h" // for operator new
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#include "mozilla/TransactionManager.h" // for TransactionManager
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#include "mozilla/dom/Selection.h"
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#include "nsAString.h"
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#include "nsComponentManagerUtils.h" // for do_CreateInstance
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#include "nsDebug.h" // for NS_ENSURE_TRUE, etc
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#include "nsError.h" // for NS_OK, NS_ERROR_FAILURE, etc
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#include "nsICommandManager.h" // for nsICommandManager
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#include "nsID.h" // for NS_GET_IID, etc
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#include "nsIDOMWindow.h" // for nsIDOMWindow
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#include "nsIDocShell.h" // for nsIDocShell
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#include "nsIInterfaceRequestorUtils.h" // for do_GetInterface
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#include "nsITransactionManager.h" // for nsITransactionManager
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#include "nsLiteralString.h" // for NS_LITERAL_STRING
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#include "nsPICommandUpdater.h" // for nsPICommandUpdater
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#include "nsPIDOMWindow.h" // for nsPIDOMWindow
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class nsITransaction;
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namespace mozilla {
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ComposerCommandsUpdater::ComposerCommandsUpdater()
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: mDirtyState(eStateUninitialized)
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, mSelectionCollapsed(eStateUninitialized)
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, mFirstDoOfFirstUndo(true)
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{
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}
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ComposerCommandsUpdater::~ComposerCommandsUpdater()
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{
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// cancel any outstanding update timer
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if (mUpdateTimer) {
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mUpdateTimer->Cancel();
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}
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}
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NS_IMPL_CYCLE_COLLECTING_ADDREF(ComposerCommandsUpdater)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(ComposerCommandsUpdater)
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NS_INTERFACE_MAP_BEGIN(ComposerCommandsUpdater)
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NS_INTERFACE_MAP_ENTRY(nsIDocumentStateListener)
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NS_INTERFACE_MAP_ENTRY(nsITransactionListener)
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NS_INTERFACE_MAP_ENTRY(nsITimerCallback)
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NS_INTERFACE_MAP_ENTRY(nsINamed)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDocumentStateListener)
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NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(ComposerCommandsUpdater)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION(ComposerCommandsUpdater,
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mUpdateTimer,
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mDOMWindow,
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mDocShell)
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#if 0
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#pragma mark -
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#endif
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NS_IMETHODIMP
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ComposerCommandsUpdater::NotifyDocumentCreated()
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{
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// Trigger an nsIObserve notification that the document has been created
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UpdateOneCommand("obs_documentCreated");
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::NotifyDocumentWillBeDestroyed()
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{
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// cancel any outstanding update timer
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if (mUpdateTimer) {
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mUpdateTimer->Cancel();
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mUpdateTimer = nullptr;
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}
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// We can't call this right now; it is too late in some cases and the window
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// is already partially destructed (e.g. JS objects may be gone).
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#if 0
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// Trigger an nsIObserve notification that the document will be destroyed
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UpdateOneCommand("obs_documentWillBeDestroyed");
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#endif
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::NotifyDocumentStateChanged(bool aNowDirty)
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{
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// update document modified. We should have some other notifications for this too.
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return UpdateDirtyState(aNowDirty);
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}
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#if 0
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#pragma mark -
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#endif
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NS_IMETHODIMP
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ComposerCommandsUpdater::WillDo(nsITransactionManager* aManager,
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nsITransaction* aTransaction,
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bool* aInterrupt)
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{
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*aInterrupt = false;
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::DidDo(nsITransactionManager* aManager,
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nsITransaction* aTransaction,
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nsresult aDoResult)
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{
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// only need to update if the status of the Undo menu item changes.
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size_t undoCount = aManager->AsTransactionManager()->NumberOfUndoItems();
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if (undoCount == 1) {
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if (mFirstDoOfFirstUndo) {
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UpdateCommandGroup(NS_LITERAL_STRING("undo"));
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}
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mFirstDoOfFirstUndo = false;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::WillUndo(nsITransactionManager* aManager,
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nsITransaction* aTransaction,
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bool* aInterrupt)
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{
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*aInterrupt = false;
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::DidUndo(nsITransactionManager* aManager,
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nsITransaction* aTransaction,
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nsresult aUndoResult)
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{
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size_t undoCount = aManager->AsTransactionManager()->NumberOfUndoItems();
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if (!undoCount) {
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mFirstDoOfFirstUndo = true; // reset the state for the next do
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}
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UpdateCommandGroup(NS_LITERAL_STRING("undo"));
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::WillRedo(nsITransactionManager* aManager,
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nsITransaction* aTransaction,
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bool* aInterrupt)
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{
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*aInterrupt = false;
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::DidRedo(nsITransactionManager* aManager,
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nsITransaction* aTransaction,
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nsresult aRedoResult)
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{
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UpdateCommandGroup(NS_LITERAL_STRING("undo"));
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::WillBeginBatch(nsITransactionManager* aManager,
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bool* aInterrupt)
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{
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*aInterrupt = false;
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::DidBeginBatch(nsITransactionManager* aManager,
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nsresult aResult)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::WillEndBatch(nsITransactionManager* aManager,
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bool* aInterrupt)
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{
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*aInterrupt = false;
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::DidEndBatch(nsITransactionManager* aManager,
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nsresult aResult)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::WillMerge(nsITransactionManager* aManager,
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nsITransaction* aTopTransaction,
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nsITransaction* aTransactionToMerge,
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bool* aInterrupt)
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{
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*aInterrupt = false;
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return NS_OK;
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::DidMerge(nsITransactionManager* aManager,
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nsITransaction* aTopTransaction,
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nsITransaction* aTransactionToMerge,
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bool aDidMerge,
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nsresult aMergeResult)
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{
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return NS_OK;
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}
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#if 0
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#pragma mark -
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#endif
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nsresult
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ComposerCommandsUpdater::Init(nsPIDOMWindowOuter* aDOMWindow)
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{
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if (NS_WARN_IF(!aDOMWindow)) {
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return NS_ERROR_INVALID_ARG;
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}
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mDOMWindow = aDOMWindow;
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mDocShell = aDOMWindow->GetDocShell();
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return NS_OK;
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}
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nsresult
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ComposerCommandsUpdater::PrimeUpdateTimer()
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{
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if (!mUpdateTimer) {
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mUpdateTimer = NS_NewTimer();;
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NS_ENSURE_TRUE(mUpdateTimer, NS_ERROR_OUT_OF_MEMORY);
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}
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const uint32_t kUpdateTimerDelay = 150;
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return mUpdateTimer->InitWithCallback(static_cast<nsITimerCallback*>(this),
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kUpdateTimerDelay,
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nsITimer::TYPE_ONE_SHOT);
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}
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void
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ComposerCommandsUpdater::TimerCallback()
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{
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// if the selection state has changed, update stuff
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bool isCollapsed = SelectionIsCollapsed();
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if (static_cast<int8_t>(isCollapsed) != mSelectionCollapsed) {
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UpdateCommandGroup(NS_LITERAL_STRING("select"));
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mSelectionCollapsed = isCollapsed;
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}
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// isn't this redundant with the UpdateCommandGroup above?
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// can we just nuke the above call? or create a meta command group?
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UpdateCommandGroup(NS_LITERAL_STRING("style"));
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}
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nsresult
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ComposerCommandsUpdater::UpdateDirtyState(bool aNowDirty)
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{
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if (mDirtyState != static_cast<int8_t>(aNowDirty)) {
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UpdateCommandGroup(NS_LITERAL_STRING("save"));
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UpdateCommandGroup(NS_LITERAL_STRING("undo"));
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mDirtyState = aNowDirty;
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}
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return NS_OK;
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}
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nsresult
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ComposerCommandsUpdater::UpdateCommandGroup(const nsAString& aCommandGroup)
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{
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nsCOMPtr<nsPICommandUpdater> commandUpdater = GetCommandUpdater();
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NS_ENSURE_TRUE(commandUpdater, NS_ERROR_FAILURE);
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// This hardcoded list of commands is temporary.
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// This code should use nsIControllerCommandGroup.
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if (aCommandGroup.EqualsLiteral("undo")) {
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commandUpdater->CommandStatusChanged("cmd_undo");
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commandUpdater->CommandStatusChanged("cmd_redo");
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return NS_OK;
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}
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if (aCommandGroup.EqualsLiteral("select") ||
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aCommandGroup.EqualsLiteral("style")) {
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commandUpdater->CommandStatusChanged("cmd_bold");
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commandUpdater->CommandStatusChanged("cmd_italic");
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commandUpdater->CommandStatusChanged("cmd_underline");
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commandUpdater->CommandStatusChanged("cmd_tt");
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commandUpdater->CommandStatusChanged("cmd_strikethrough");
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commandUpdater->CommandStatusChanged("cmd_superscript");
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commandUpdater->CommandStatusChanged("cmd_subscript");
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commandUpdater->CommandStatusChanged("cmd_nobreak");
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commandUpdater->CommandStatusChanged("cmd_em");
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commandUpdater->CommandStatusChanged("cmd_strong");
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commandUpdater->CommandStatusChanged("cmd_cite");
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commandUpdater->CommandStatusChanged("cmd_abbr");
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commandUpdater->CommandStatusChanged("cmd_acronym");
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commandUpdater->CommandStatusChanged("cmd_code");
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commandUpdater->CommandStatusChanged("cmd_samp");
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commandUpdater->CommandStatusChanged("cmd_var");
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commandUpdater->CommandStatusChanged("cmd_increaseFont");
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commandUpdater->CommandStatusChanged("cmd_decreaseFont");
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commandUpdater->CommandStatusChanged("cmd_paragraphState");
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commandUpdater->CommandStatusChanged("cmd_fontFace");
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commandUpdater->CommandStatusChanged("cmd_fontColor");
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commandUpdater->CommandStatusChanged("cmd_backgroundColor");
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commandUpdater->CommandStatusChanged("cmd_highlight");
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return NS_OK;
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}
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if (aCommandGroup.EqualsLiteral("save")) {
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// save commands (most are not in C++)
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commandUpdater->CommandStatusChanged("cmd_setDocumentModified");
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commandUpdater->CommandStatusChanged("cmd_save");
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return NS_OK;
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}
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return NS_OK;
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}
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nsresult
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ComposerCommandsUpdater::UpdateOneCommand(const char* aCommand)
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{
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nsCOMPtr<nsPICommandUpdater> commandUpdater = GetCommandUpdater();
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NS_ENSURE_TRUE(commandUpdater, NS_ERROR_FAILURE);
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commandUpdater->CommandStatusChanged(aCommand);
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return NS_OK;
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}
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bool
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ComposerCommandsUpdater::SelectionIsCollapsed()
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{
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if (NS_WARN_IF(!mDOMWindow)) {
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return true;
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}
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RefPtr<dom::Selection> domSelection = mDOMWindow->GetSelection();
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if (NS_WARN_IF(!domSelection)) {
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return false;
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}
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return domSelection->IsCollapsed();
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}
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already_AddRefed<nsPICommandUpdater>
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ComposerCommandsUpdater::GetCommandUpdater()
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{
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if (NS_WARN_IF(!mDocShell)) {
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return nullptr;
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}
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nsCOMPtr<nsICommandManager> manager = mDocShell->GetCommandManager();
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nsCOMPtr<nsPICommandUpdater> updater = do_QueryInterface(manager);
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return updater.forget();
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}
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NS_IMETHODIMP
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ComposerCommandsUpdater::GetName(nsACString& aName)
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{
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aName.AssignLiteral("ComposerCommandsUpdater");
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return NS_OK;
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}
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#if 0
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#pragma mark -
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#endif
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nsresult
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ComposerCommandsUpdater::Notify(nsITimer* aTimer)
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{
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NS_ASSERTION(aTimer == mUpdateTimer.get(), "Hey, this ain't my timer!");
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TimerCallback();
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return NS_OK;
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}
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#if 0
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#pragma mark -
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#endif
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} // namespace mozilla
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