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gecko-dev/editor/libeditor/EditorBase.h

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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_EditorBase_h
#define mozilla_EditorBase_h
#include "mozilla/intl/BidiEmbeddingLevel.h"
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc.
#include "mozilla/EditAction.h" // for EditAction and EditSubAction
#include "mozilla/EditorDOMPoint.h" // for EditorDOMPoint
#include "mozilla/EditorForwards.h"
#include "mozilla/EventForwards.h" // for InputEventTargetRanges
#include "mozilla/Likely.h" // for MOZ_UNLIKELY, MOZ_LIKELY
#include "mozilla/Maybe.h" // for Maybe
#include "mozilla/OwningNonNull.h" // for OwningNonNull
#include "mozilla/PendingStyles.h" // for PendingStyle, PendingStyleCache
#include "mozilla/RangeBoundary.h" // for RawRangeBoundary, RangeBoundary
#include "mozilla/SelectionState.h" // for RangeUpdater, etc.
#include "mozilla/StyleSheet.h" // for StyleSheet
#include "mozilla/TransactionManager.h" // for TransactionManager
#include "mozilla/WeakPtr.h" // for WeakPtr
#include "mozilla/dom/DataTransfer.h" // for dom::DataTransfer
#include "mozilla/dom/HTMLBRElement.h" // for dom::HTMLBRElement
#include "mozilla/dom/Selection.h"
#include "mozilla/dom/Text.h"
#include "nsAtom.h" // for nsAtom, nsStaticAtom
#include "nsCOMPtr.h" // for already_AddRefed, nsCOMPtr
#include "nsCycleCollectionParticipant.h"
#include "nsGkAtoms.h"
#include "nsIContentInlines.h" // for nsINode::IsEditable()
#include "nsIEditor.h" // for nsIEditor, etc.
#include "nsISelectionController.h" // for nsISelectionController constants
#include "nsISelectionListener.h" // for nsISelectionListener
#include "nsISupportsImpl.h" // for EditorBase::Release, etc.
#include "nsIWeakReferenceUtils.h" // for nsWeakPtr
#include "nsLiteralString.h" // for NS_LITERAL_STRING
#include "nsPIDOMWindow.h" // for nsPIDOMWindowInner, etc.
#include "nsString.h" // for nsCString
#include "nsTArray.h" // for nsTArray and nsAutoTArray
#include "nsWeakReference.h" // for nsSupportsWeakReference
#include "nscore.h" // for nsresult, nsAString, etc.
#include <tuple> // for std::tuple
class mozInlineSpellChecker;
class nsAtom;
class nsCaret;
class nsIContent;
class nsIDocumentEncoder;
class nsIDocumentStateListener;
class nsIEditActionListener;
class nsINode;
class nsIPrincipal;
class nsISupports;
class nsITransferable;
class nsITransaction;
class nsIWidget;
class nsRange;
namespace mozilla {
class AlignStateAtSelection;
class AutoTransactionsConserveSelection;
class AutoUpdateViewBatch;
class ErrorResult;
class IMEContentObserver;
class ListElementSelectionState;
class ListItemElementSelectionState;
class ParagraphStateAtSelection;
class PresShell;
class TextComposition;
class TextInputListener;
class TextServicesDocument;
namespace dom {
class AbstractRange;
class DataTransfer;
class Document;
class DragEvent;
class Element;
class EventTarget;
class HTMLBRElement;
} // namespace dom
namespace widget {
struct IMEState;
} // namespace widget
/**
* Implementation of an editor object. it will be the controller/focal point
* for the main editor services. i.e. the GUIManager, publishing, transaction
* manager, event interfaces. the idea for the event interfaces is to have them
* delegate the actual commands to the editor independent of the XPFE
* implementation.
*/
class EditorBase : public nsIEditor,
public nsISelectionListener,
public nsSupportsWeakReference {
public:
/****************************************************************************
* NOTE: DO NOT MAKE YOUR NEW METHODS PUBLIC IF they are called by other
* classes under libeditor except EditorEventListener and
* HTMLEditorEventListener because each public method which may fire
* eEditorInput event will need to instantiate new stack class for
* managing input type value of eEditorInput and cache some objects
* for smarter handling. In other words, when you add new root
* method to edit the DOM tree, you can make your new method public.
****************************************************************************/
using Document = dom::Document;
using Element = dom::Element;
using InterlinePosition = dom::Selection::InterlinePosition;
using Selection = dom::Selection;
using Text = dom::Text;
enum class EditorType { Text, HTML };
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(EditorBase, nsIEditor)
// nsIEditor methods
NS_DECL_NSIEDITOR
// nsISelectionListener method
NS_DECL_NSISELECTIONLISTENER
/**
* The default constructor. This should suffice. the setting of the
* interfaces is done after the construction of the editor class.
*/
explicit EditorBase(EditorType aEditorType);
[[nodiscard]] bool IsInitialized() const {
return mDocument && mDidPostCreate;
}
[[nodiscard]] bool IsBeingInitialized() const {
return mDocument && !mDidPostCreate;
}
[[nodiscard]] bool Destroyed() const { return mDidPreDestroy; }
Document* GetDocument() const { return mDocument; }
nsPIDOMWindowOuter* GetWindow() const;
nsPIDOMWindowInner* GetInnerWindow() const;
/**
* MayHaveMutationEventListeners() returns true when the window may have
* mutation event listeners.
*
* @param aMutationEventType One or multiple of NS_EVENT_BITS_MUTATION_*.
* @return true if the editor is an HTMLEditor instance,
* and at least one of NS_EVENT_BITS_MUTATION_* is
* set to the window or in debug build.
*/
bool MayHaveMutationEventListeners(
uint32_t aMutationEventType = 0xFFFFFFFF) const {
if (IsTextEditor()) {
// DOM mutation event listeners cannot catch the changes of
// <input type="text"> nor <textarea>.
return false;
}
#ifdef DEBUG
// On debug build, this should always return true for testing complicated
// path without mutation event listeners because when mutation event
// listeners do not touch the DOM, editor needs to run as there is no
// mutation event listeners.
return true;
#else // #ifdef DEBUG
nsPIDOMWindowInner* window = GetInnerWindow();
return window ? window->HasMutationListeners(aMutationEventType) : false;
#endif // #ifdef DEBUG #else
}
/**
* MayHaveBeforeInputEventListenersForTelemetry() returns true when the
* window may have or have had one or more `beforeinput` event listeners.
* Note that this may return false even if there is a `beforeinput`.
* See nsPIDOMWindowInner::HasBeforeInputEventListenersForTelemetry()'s
* comment for the detail.
*/
bool MayHaveBeforeInputEventListenersForTelemetry() const {
if (const nsPIDOMWindowInner* window = GetInnerWindow()) {
return window->HasBeforeInputEventListenersForTelemetry();
}
return false;
}
/**
* MutationObserverHasObservedNodeForTelemetry() returns true when a node in
* the window may have been observed by the web apps with a mutation observer
* (i.e., `MutationObserver.observe()` called by chrome script and addon's
* script does not make this returns true).
* Note that this may return false even if there is a node observed by
* a MutationObserver. See
* nsPIDOMWindowInner::MutationObserverHasObservedNodeForTelemetry()'s comment
* for the detail.
*/
bool MutationObserverHasObservedNodeForTelemetry() const {
if (const nsPIDOMWindowInner* window = GetInnerWindow()) {
return window->MutationObserverHasObservedNodeForTelemetry();
}
return false;
}
/**
* This checks whether the call with aPrincipal should or should not be
* treated as user input.
*/
[[nodiscard]] static bool TreatAsUserInput(nsIPrincipal* aPrincipal);
PresShell* GetPresShell() const;
nsPresContext* GetPresContext() const;
already_AddRefed<nsCaret> GetCaret() const;
already_AddRefed<nsIWidget> GetWidget() const;
nsISelectionController* GetSelectionController() const;
nsresult GetSelection(SelectionType aSelectionType,
Selection** aSelection) const;
Selection* GetSelection(
SelectionType aSelectionType = SelectionType::eNormal) const {
if (aSelectionType == SelectionType::eNormal &&
IsEditActionDataAvailable()) {
return &SelectionRef();
}
nsISelectionController* sc = GetSelectionController();
if (!sc) {
return nullptr;
}
Selection* selection = sc->GetSelection(ToRawSelectionType(aSelectionType));
return selection;
}
/**
* @return Ancestor limiter of normal selection
*/
[[nodiscard]] nsIContent* GetSelectionAncestorLimiter() const {
Selection* selection = GetSelection(SelectionType::eNormal);
return selection ? selection->GetAncestorLimiter() : nullptr;
}
/**
* Fast non-refcounting editor root element accessor
*/
Element* GetRoot() const { return mRootElement; }
/**
* Likewise, but gets the text control element instead of the root for
* plaintext editors.
*/
Element* GetExposedRoot() const;
/**
* Set or unset TextInputListener. If setting non-nullptr when the editor
* already has a TextInputListener, this will crash in debug build.
*/
void SetTextInputListener(TextInputListener* aTextInputListener);
/**
* Set or unset IMEContentObserver. If setting non-nullptr when the editor
* already has an IMEContentObserver, this will crash in debug build.
*/
void SetIMEContentObserver(IMEContentObserver* aIMEContentObserver);
/**
* Returns current composition.
*/
TextComposition* GetComposition() const;
/**
* Get preferred IME status of current widget.
*/
virtual nsresult GetPreferredIMEState(widget::IMEState* aState);
/**
* Returns true if there is composition string and not fixed.
*/
bool IsIMEComposing() const;
/**
* Commit composition if there is.
* Note that when there is a composition, this requests to commit composition
* to native IME. Therefore, when there is composition, this can do anything.
* For example, the editor instance, the widget or the process itself may
* be destroyed.
*/
nsresult CommitComposition();
/**
* ToggleTextDirection() toggles text-direction of the root element.
*
* @param aPrincipal Set subject principal if it may be called by
* JS. If set to nullptr, will be treated as
* called by system.
*/
MOZ_CAN_RUN_SCRIPT nsresult
ToggleTextDirectionAsAction(nsIPrincipal* aPrincipal = nullptr);
/**
* SwitchTextDirectionTo() sets the text-direction of the root element to
* LTR or RTL.
*/
enum class TextDirection {
eLTR,
eRTL,
};
MOZ_CAN_RUN_SCRIPT void SwitchTextDirectionTo(TextDirection aTextDirection);
/**
* Finalizes selection and caret for the editor.
*/
MOZ_CAN_RUN_SCRIPT_BOUNDARY nsresult FinalizeSelection();
/**
* Returns true if selection is in an editable element and both the range
* start and the range end are editable. E.g., even if the selection range
* includes non-editable elements, returns true when one of common ancestors
* of the range start and the range end is editable. Otherwise, false.
*/
bool IsSelectionEditable();
/**
* Returns number of undo or redo items.
*/
size_t NumberOfUndoItems() const {
return mTransactionManager ? mTransactionManager->NumberOfUndoItems() : 0;
}
size_t NumberOfRedoItems() const {
return mTransactionManager ? mTransactionManager->NumberOfRedoItems() : 0;
}
/**
* Returns number of maximum undo/redo transactions.
*/
int32_t NumberOfMaximumTransactions() const {
return mTransactionManager
? mTransactionManager->NumberOfMaximumTransactions()
: 0;
}
/**
* Returns true if this editor can store transactions for undo/redo.
*/
bool IsUndoRedoEnabled() const {
return mTransactionManager &&
mTransactionManager->NumberOfMaximumTransactions();
}
/**
* Return true if it's possible to undo/redo right now.
*/
bool CanUndo() const {
return IsUndoRedoEnabled() && NumberOfUndoItems() > 0;
}
bool CanRedo() const {
return IsUndoRedoEnabled() && NumberOfRedoItems() > 0;
}
/**
* Enables or disables undo/redo feature. Returns true if it succeeded,
* otherwise, e.g., we're undoing or redoing, returns false.
*/
bool EnableUndoRedo(int32_t aMaxTransactionCount = -1) {
if (!mTransactionManager) {
mTransactionManager = new TransactionManager();
}
return mTransactionManager->EnableUndoRedo(aMaxTransactionCount);
}
bool DisableUndoRedo() {
if (!mTransactionManager) {
return true;
}
return mTransactionManager->DisableUndoRedo();
}
bool ClearUndoRedo() {
if (!mTransactionManager) {
return true;
}
return mTransactionManager->ClearUndoRedo();
}
/**
* See Document::AreClipboardCommandsUnconditionallyEnabled.
*/
bool AreClipboardCommandsUnconditionallyEnabled() const;
/**
* IsCutCommandEnabled() returns whether cut command can be enabled or
* disabled. This always returns true if we're in non-chrome HTML/XHTML
* document. Otherwise, same as the result of `IsCopyToClipboardAllowed()`.
*/
MOZ_CAN_RUN_SCRIPT bool IsCutCommandEnabled() const;
/**
* IsCopyCommandEnabled() returns copy command can be enabled or disabled.
* This always returns true if we're in non-chrome HTML/XHTML document.
* Otherwise, same as the result of `IsCopyToClipboardAllowed()`.
*/
MOZ_CAN_RUN_SCRIPT bool IsCopyCommandEnabled() const;
/**
* IsCopyToClipboardAllowed() returns true if the selected content can
* be copied into the clipboard. This returns true when:
* - `Selection` is not collapsed and we're not a password editor.
* - `Selection` is not collapsed and we're a password editor but selection
* range is in unmasked range.
*/
bool IsCopyToClipboardAllowed() const {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return false;
}
return IsCopyToClipboardAllowedInternal();
}
/**
* HandleDropEvent() is called from EditorEventListener::Drop that is handler
* of drop event.
*/
MOZ_CAN_RUN_SCRIPT nsresult HandleDropEvent(dom::DragEvent* aDropEvent);
MOZ_CAN_RUN_SCRIPT virtual nsresult HandleKeyPressEvent(
WidgetKeyboardEvent* aKeyboardEvent);
virtual dom::EventTarget* GetDOMEventTarget() const = 0;
/**
* OnCompositionStart() is called when editor receives eCompositionStart
* event which should be handled in this editor.
*/
nsresult OnCompositionStart(WidgetCompositionEvent& aCompositionStartEvent);
/**
* OnCompositionChange() is called when editor receives an eCompositioChange
* event which should be handled in this editor.
*
* @param aCompositionChangeEvent eCompositionChange event which should
* be handled in this editor.
*/
MOZ_CAN_RUN_SCRIPT nsresult
OnCompositionChange(WidgetCompositionEvent& aCompositionChangeEvent);
/**
* OnCompositionEnd() is called when editor receives an eCompositionChange
* event and it's followed by eCompositionEnd event and after
* OnCompositionChange() is called.
*/
MOZ_CAN_RUN_SCRIPT void OnCompositionEnd(
WidgetCompositionEvent& aCompositionEndEvent);
/**
* Accessor methods to flags.
*/
uint32_t Flags() const { return mFlags; }
MOZ_CAN_RUN_SCRIPT nsresult AddFlags(uint32_t aFlags) {
const uint32_t kOldFlags = Flags();
const uint32_t kNewFlags = (kOldFlags | aFlags);
if (kNewFlags == kOldFlags) {
return NS_OK;
}
return SetFlags(kNewFlags); // virtual call and may be expensive.
}
MOZ_CAN_RUN_SCRIPT nsresult RemoveFlags(uint32_t aFlags) {
const uint32_t kOldFlags = Flags();
const uint32_t kNewFlags = (kOldFlags & ~aFlags);
if (kNewFlags == kOldFlags) {
return NS_OK;
}
return SetFlags(kNewFlags); // virtual call and may be expensive.
}
MOZ_CAN_RUN_SCRIPT nsresult AddAndRemoveFlags(uint32_t aAddingFlags,
uint32_t aRemovingFlags) {
MOZ_ASSERT(!(aAddingFlags & aRemovingFlags),
"Same flags are specified both adding and removing");
const uint32_t kOldFlags = Flags();
const uint32_t kNewFlags = ((kOldFlags | aAddingFlags) & ~aRemovingFlags);
if (kNewFlags == kOldFlags) {
return NS_OK;
}
return SetFlags(kNewFlags); // virtual call and may be expensive.
}
bool IsSingleLineEditor() const {
const bool isSingleLineEditor =
(mFlags & nsIEditor::eEditorSingleLineMask) != 0;
MOZ_ASSERT_IF(isSingleLineEditor, IsTextEditor());
return isSingleLineEditor;
}
bool IsPasswordEditor() const {
const bool isPasswordEditor =
(mFlags & nsIEditor::eEditorPasswordMask) != 0;
MOZ_ASSERT_IF(isPasswordEditor, IsTextEditor());
return isPasswordEditor;
}
// FYI: Both IsRightToLeft() and IsLeftToRight() may return false if
// the editor inherits the content node's direction.
bool IsRightToLeft() const {
return (mFlags & nsIEditor::eEditorRightToLeft) != 0;
}
bool IsLeftToRight() const {
return (mFlags & nsIEditor::eEditorLeftToRight) != 0;
}
bool IsReadonly() const {
return (mFlags & nsIEditor::eEditorReadonlyMask) != 0;
}
bool IsMailEditor() const {
return (mFlags & nsIEditor::eEditorMailMask) != 0;
}
bool IsInteractionAllowed() const {
const bool isInteractionAllowed =
(mFlags & nsIEditor::eEditorAllowInteraction) != 0;
MOZ_ASSERT_IF(isInteractionAllowed, IsHTMLEditor());
return isInteractionAllowed;
}
bool ShouldSkipSpellCheck() const {
return (mFlags & nsIEditor::eEditorSkipSpellCheck) != 0;
}
bool HasIndependentSelection() const {
MOZ_ASSERT_IF(mSelectionController, IsTextEditor());
return !!mSelectionController;
}
bool IsModifiable() const { return !IsReadonly(); }
/**
* IsInEditSubAction() return true while the instance is handling an edit
* sub-action. Otherwise, false.
*/
bool IsInEditSubAction() const { return mIsInEditSubAction; }
/**
* IsEmpty() checks whether the editor is empty. If editor has only padding
* <br> element for empty editor, returns true. If editor's root element has
* non-empty text nodes or other nodes like <br>, returns false.
*/
virtual bool IsEmpty() const = 0;
/**
* SuppressDispatchingInputEvent() suppresses or unsuppresses dispatching
* "input" event.
*/
void SuppressDispatchingInputEvent(bool aSuppress) {
mDispatchInputEvent = !aSuppress;
}
/**
* IsSuppressingDispatchingInputEvent() returns true if the editor stops
* dispatching input event. Otherwise, false.
*/
bool IsSuppressingDispatchingInputEvent() const {
return !mDispatchInputEvent;
}
/**
* Returns true if markNodeDirty() has any effect. Returns false if
* markNodeDirty() is a no-op.
*/
bool OutputsMozDirty() const {
// Return true for Composer (!IsInteractionAllowed()) or mail
// (IsMailEditor()), but false for webpages.
return !IsInteractionAllowed() || IsMailEditor();
}
/**
* Get the focused element, if we're focused. Returns null otherwise.
*/
virtual Element* GetFocusedElement() const;
/**
* Whether the aGUIEvent should be handled by this editor or not. When this
* returns false, The aGUIEvent shouldn't be handled on this editor,
* i.e., The aGUIEvent should be handled by another inner editor or ancestor
* elements.
*/
virtual bool IsAcceptableInputEvent(WidgetGUIEvent* aGUIEvent) const;
/**
* FindSelectionRoot() returns a selection root of this editor when aNode
* gets focus. aNode must be a content node or a document node. When the
* target isn't a part of this editor, returns nullptr. If this is for
* designMode, you should set the document node to aNode except that an
* element in the document has focus.
*/
[[nodiscard]] virtual Element* FindSelectionRoot(const nsINode& aNode) const;
/**
* OnFocus() is called when we get a focus event.
*
* @param aOriginalEventTargetNode The original event target node of the
* focus event.
*/
MOZ_CAN_RUN_SCRIPT virtual nsresult OnFocus(
const nsINode& aOriginalEventTargetNode);
/**
* OnBlur() is called when we're blurred.
*
* @param aEventTarget The event target of the blur event.
*/
virtual nsresult OnBlur(const dom::EventTarget* aEventTarget) = 0;
/** Resyncs spellchecking state (enabled/disabled). This should be called
* when anything that affects spellchecking state changes, such as the
* spellcheck attribute value.
*/
void SyncRealTimeSpell();
/**
* Do "cut".
*
* @param aPrincipal If you know current context is subject
* principal or system principal, set it.
* When nullptr, this checks it automatically.
*/
MOZ_CAN_RUN_SCRIPT nsresult CutAsAction(nsIPrincipal* aPrincipal = nullptr);
/**
* CanPaste() returns true if user can paste something at current selection.
*/
virtual bool CanPaste(int32_t aClipboardType) const = 0;
/**
* Do "undo" or "redo".
*
* @param aCount How many count of transactions should be
* handled.
* @param aPrincipal Set subject principal if it may be called by
* JS. If set to nullptr, will be treated as
* called by system.
*/
MOZ_CAN_RUN_SCRIPT nsresult UndoAsAction(uint32_t aCount,
nsIPrincipal* aPrincipal = nullptr);
MOZ_CAN_RUN_SCRIPT nsresult RedoAsAction(uint32_t aCount,
nsIPrincipal* aPrincipal = nullptr);
/**
* InsertTextAsAction() inserts aStringToInsert at selection.
* Although this method is implementation of nsIEditor.insertText(),
* this treats the input is an edit action. If you'd like to insert text
* as part of edit action, you probably should use InsertTextAsSubAction().
*
* @param aStringToInsert The string to insert.
* @param aPrincipal Set subject principal if it may be called by
* JS. If set to nullptr, will be treated as
* called by system.
*/
MOZ_CAN_RUN_SCRIPT nsresult InsertTextAsAction(
const nsAString& aStringToInsert, nsIPrincipal* aPrincipal = nullptr);
/**
* InsertLineBreakAsAction() is called when user inputs a line break with
* Enter or something. If the instance is `HTMLEditor`, this is called
* when Shift + Enter or "insertlinebreak" command.
*
* @param aPrincipal Set subject principal if it may be called by
* JS. If set to nullptr, will be treated as
* called by system.
*/
MOZ_CAN_RUN_SCRIPT virtual nsresult InsertLineBreakAsAction(
nsIPrincipal* aPrincipal = nullptr) = 0;
/**
* CanDeleteSelection() returns true if `Selection` is not collapsed and
* it's allowed to be removed.
*/
bool CanDeleteSelection() const {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return false;
}
return IsModifiable() && !SelectionRef().IsCollapsed();
}
/**
* DeleteSelectionAsAction() removes selection content or content around
* caret with transactions. This should be used for handling it as an
* edit action. If you'd like to remove selection for preparing to insert
* something, you probably should use DeleteSelectionAsSubAction().
*
* @param aDirectionAndAmount How much range should be removed.
* @param aStripWrappers Whether the parent blocks should be removed
* when they become empty.
* @param aPrincipal Set subject principal if it may be called by
* JS. If set to nullptr, will be treated as
* called by system.
*/
MOZ_CAN_RUN_SCRIPT nsresult
DeleteSelectionAsAction(nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
nsIPrincipal* aPrincipal = nullptr);
enum class AllowBeforeInputEventCancelable {
No,
Yes,
};
/**
* Replace text in aReplaceRange or all text in this editor with aString and
* treat the change as inserting the string.
*
* @param aString The string to set.
* @param aReplaceRange The range to be replaced.
* If nullptr, all contents will be replaced.
* NOTE: Currently, nullptr is not allowed if
* the editor is an HTMLEditor.
* @param aAllowBeforeInputEventCancelable
* Whether `beforeinput` event which will be
* dispatched for this can be cancelable or not.
* @param aPrincipal Set subject principal if it may be called by
* JS. If set to nullptr, will be treated as
* called by system.
*/
MOZ_CAN_RUN_SCRIPT nsresult ReplaceTextAsAction(
const nsAString& aString, nsRange* aReplaceRange,
AllowBeforeInputEventCancelable aAllowBeforeInputEventCancelable,
nsIPrincipal* aPrincipal = nullptr);
/**
* Can we paste |aTransferable| or, if |aTransferable| is null, will a call
* to pasteTransferable later possibly succeed if given an instance of
* nsITransferable then? True if the doc is modifiable, and, if
* |aTransfeable| is non-null, we have pasteable data in |aTransfeable|.
*/
virtual bool CanPasteTransferable(nsITransferable* aTransferable) = 0;
/**
* PasteAsAction() pastes clipboard content to Selection. This method
* may dispatch ePaste event first. If its defaultPrevent() is called,
* this does nothing but returns NS_OK.
*
* @param aClipboardType nsIClipboard::kGlobalClipboard or
* nsIClipboard::kSelectionClipboard.
* @param aDispatchPasteEvent Yes if this should dispatch ePaste event
* before pasting. Otherwise, No.
* @param aPrincipal Set subject principal if it may be called by
* JS. If set to nullptr, will be treated as
* called by system.
*/
enum class DispatchPasteEvent { No, Yes };
MOZ_CAN_RUN_SCRIPT nsresult
PasteAsAction(int32_t aClipboardType, DispatchPasteEvent aDispatchPasteEvent,
nsIPrincipal* aPrincipal = nullptr);
/**
* Paste aTransferable at Selection.
*
* @param aTransferable Must not be nullptr.
* @param aDispatchPasteEvent Yes if this should dispatch ePaste event
* before pasting. Otherwise, No.
* @param aPrincipal Set subject principal if it may be called by
* JS. If set to nullptr, will be treated as
* called by system.
*/
MOZ_CAN_RUN_SCRIPT nsresult PasteTransferableAsAction(
nsITransferable* aTransferable, DispatchPasteEvent aDispatchPasteEvent,
nsIPrincipal* aPrincipal = nullptr);
/**
* PasteAsQuotationAsAction() pastes content in clipboard as quotation.
* If the editor is TextEditor or in plaintext mode, will paste the content
* with appending ">" to start of each line.
* if the editor is HTMLEditor and is not in plaintext mode, will patste it
* into newly created blockquote element.
*
* @param aClipboardType nsIClipboard::kGlobalClipboard or
* nsIClipboard::kSelectionClipboard.
* @param aDispatchPasteEvent Yes if this should dispatch ePaste event
* before pasting. Otherwise, No.
* @param aPrincipal Set subject principal if it may be called by
* JS. If set to nullptr, will be treated as
* called by system.
*/
MOZ_CAN_RUN_SCRIPT nsresult PasteAsQuotationAsAction(
int32_t aClipboardType, DispatchPasteEvent aDispatchPasteEvent,
nsIPrincipal* aPrincipal = nullptr);
protected: // May be used by friends.
class AutoEditActionDataSetter;
/**
* TopLevelEditSubActionData stores temporary data while we're handling
* top-level edit sub-action.
*/
struct MOZ_STACK_CLASS TopLevelEditSubActionData final {
friend class AutoEditActionDataSetter;
// Set selected range before edit. Then, RangeUpdater keep modifying
// the range while we're changing the DOM tree.
RefPtr<RangeItem> mSelectedRange;
// Computing changed range while we're handling sub actions.
RefPtr<nsRange> mChangedRange;
// XXX In strict speaking, mCachedPendingStyles isn't enough to cache
// inline styles because inline style can be specified with "style"
// attribute and/or CSS in <style> elements or CSS files. So, we need
// to look for better implementation about this.
// FYI: Initialization cost of AutoPendingStyleCacheArray is expensive and
// it is not used by TextEditor so that we should construct it only
// when we're an HTMLEditor.
Maybe<AutoPendingStyleCacheArray> mCachedPendingStyles;
// If we tried to delete selection, set to true.
bool mDidDeleteSelection;
// If we have explicitly set selection inter line, set to true.
// `AfterEdit()` or something shouldn't overwrite it in such case.
bool mDidExplicitlySetInterLine;
// If we have deleted non-collapsed range set to true, there are only 2
// cases for now:
// - non-collapsed range was selected.
// - selection was collapsed in a text node and a Unicode character
// was removed.
bool mDidDeleteNonCollapsedRange;
// If we have deleted parent empty blocks, set to true.
bool mDidDeleteEmptyParentBlocks;
// If we're a contenteditable editor, we temporarily increase edit count
// of the document between `BeforeEdit()` and `AfterEdit()`. I.e., if
// we increased the count in `BeforeEdit()`, we need to decrease it in
// `AfterEdit()`, however, the document may be changed to designMode or
// non-editable. Therefore, we need to store with this whether we need
// to restore it.
bool mRestoreContentEditableCount;
// If we explicitly normalized whitespaces around the changed range,
// set to true.
bool mDidNormalizeWhitespaces;
// Set to true by default. If somebody inserts an HTML fragment
// intentionally, any empty elements shouldn't be cleaned up later. In the
// case this is set to false.
// TODO: We should not do this by default. If it's necessary, each edit
// action handler do it by itself instead. Then, we can avoid such
// unnecessary DOM tree scan.
bool mNeedsToCleanUpEmptyElements;
/**
* The following methods modifies some data of this struct and
* `EditSubActionData` struct. Currently, these are required only
* by `HTMLEditor`. Therefore, for cutting the runtime cost of
* `TextEditor`, these methods should be called only by `HTMLEditor`.
* But it's fine to use these methods in `TextEditor` if necessary.
* If so, you need to call `DidDeleteText()` and `DidInsertText()`
* from `SetTextNodeWithoutTransaction()`.
*/
void DidCreateElement(EditorBase& aEditorBase, Element& aNewElement);
void DidInsertContent(EditorBase& aEditorBase, nsIContent& aNewContent);
void WillDeleteContent(EditorBase& aEditorBase,
nsIContent& aRemovingContent);
void DidSplitContent(EditorBase& aEditorBase, nsIContent& aSplitContent,
nsIContent& aNewContent);
void DidJoinContents(EditorBase& aEditorBase,
const EditorRawDOMPoint& aJoinedPoint);
void DidInsertText(EditorBase& aEditorBase,
const EditorRawDOMPoint& aInsertionBegin,
const EditorRawDOMPoint& aInsertionEnd);
void DidDeleteText(EditorBase& aEditorBase,
const EditorRawDOMPoint& aStartInTextNode);
void WillDeleteRange(EditorBase& aEditorBase,
const EditorRawDOMPoint& aStart,
const EditorRawDOMPoint& aEnd);
private:
void Clear() {
mDidExplicitlySetInterLine = false;
// We don't need to clear other members which are referred only when the
// editor is an HTML editor anymore. Note that if `mSelectedRange` is
// non-nullptr, that means that we're in `HTMLEditor`.
if (!mSelectedRange) {
return;
}
mSelectedRange->Clear();
mChangedRange->Reset();
if (mCachedPendingStyles.isSome()) {
mCachedPendingStyles->Clear();
}
mDidDeleteSelection = false;
mDidDeleteNonCollapsedRange = false;
mDidDeleteEmptyParentBlocks = false;
mRestoreContentEditableCount = false;
mDidNormalizeWhitespaces = false;
mNeedsToCleanUpEmptyElements = true;
}
/**
* Extend mChangedRange to include `aNode`.
*/
nsresult AddNodeToChangedRange(const HTMLEditor& aHTMLEditor,
nsINode& aNode);
/**
* Extend mChangedRange to include `aPoint`.
*/
nsresult AddPointToChangedRange(const HTMLEditor& aHTMLEditor,
const EditorRawDOMPoint& aPoint);
/**
* Extend mChangedRange to include `aStart` and `aEnd`.
*/
nsresult AddRangeToChangedRange(const HTMLEditor& aHTMLEditor,
const EditorRawDOMPoint& aStart,
const EditorRawDOMPoint& aEnd);
TopLevelEditSubActionData() = default;
TopLevelEditSubActionData(const TopLevelEditSubActionData& aOther) = delete;
};
struct MOZ_STACK_CLASS EditSubActionData final {
// While this is set to false, TopLevelEditSubActionData::mChangedRange
// shouldn't be modified since in some cases, modifying it in the setter
// itself may be faster. Note that we should affect this only for current
// edit sub action since mutation event listener may edit different range.
bool mAdjustChangedRangeFromListener;
private:
void Clear() { mAdjustChangedRangeFromListener = true; }
friend EditorBase;
};
protected: // AutoEditActionDataSetter, this shouldn't be accessed by friends.
/**
* SettingDataTransfer enum class is used to specify whether DataTransfer
* should be initialized with or without format. For example, when user
* uses Accel + Shift + V to paste text without format, DataTransfer should
* have only plain/text data to make web apps treat it without format.
*/
enum class SettingDataTransfer {
eWithFormat,
eWithoutFormat,
};
/**
* AutoEditActionDataSetter grabs some necessary objects for handling any
* edit actions and store the edit action what we're handling. When this is
* created, its pointer is set to the mEditActionData, and this guarantees
* the lifetime of grabbing objects until it's destroyed.
*/
class MOZ_STACK_CLASS AutoEditActionDataSetter final {
public:
// NOTE: aPrincipal will be used when we implement "beforeinput" event.
// It's set only when maybe we shouldn't dispatch it because of
// called by JS. I.e., if this is nullptr, we can always dispatch
// it.
AutoEditActionDataSetter(const EditorBase& aEditorBase,
EditAction aEditAction,
nsIPrincipal* aPrincipal = nullptr);
~AutoEditActionDataSetter();
void SetSelectionCreatedByDoubleclick(bool aSelectionCreatedByDoubleclick) {
mSelectionCreatedByDoubleclick = aSelectionCreatedByDoubleclick;
}
[[nodiscard]] bool SelectionCreatedByDoubleclick() const {
return mSelectionCreatedByDoubleclick;
}
void UpdateEditAction(EditAction aEditAction) {
MOZ_ASSERT(!mHasTriedToDispatchBeforeInputEvent,
"It's too late to update EditAction since this may have "
"already dispatched a beforeinput event");
mEditAction = aEditAction;
}
/**
* CanHandle() or CanHandleAndHandleBeforeInput() must be called
* immediately after creating the instance. If caller does not need to
* handle "beforeinput" event or caller needs to set additional information
* the events later, use the former. Otherwise, use the latter. If caller
* uses the former, it's required to call MaybeDispatchBeforeInputEvent() by
* itself.
*
*/
[[nodiscard]] bool CanHandle() const {
#ifdef DEBUG
mHasCanHandleChecked = true;
#endif // #ifdefn DEBUG
// Don't allow to run new edit action when an edit action caused
// destroying the editor while it's being handled.
if (mEditAction != EditAction::eInitializing &&
mEditorWasDestroyedDuringHandlingEditAction) {
NS_WARNING("Editor was destroyed during an edit action being handled");
return false;
}
return IsDataAvailable();
}
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
CanHandleAndMaybeDispatchBeforeInputEvent() {
if (MOZ_UNLIKELY(NS_WARN_IF(!CanHandle()))) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = MaybeFlushPendingNotifications();
if (MOZ_UNLIKELY(NS_FAILED(rv))) {
return rv;
}
return MaybeDispatchBeforeInputEvent();
}
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
CanHandleAndFlushPendingNotifications() {
if (MOZ_UNLIKELY(NS_WARN_IF(!CanHandle()))) {
return NS_ERROR_NOT_INITIALIZED;
}
MOZ_ASSERT(MayEditActionRequireLayout(mRawEditAction));
return MaybeFlushPendingNotifications();
}
[[nodiscard]] bool IsDataAvailable() const {
return mSelection && mEditorBase.mDocument;
}
/**
* MaybeDispatchBeforeInputEvent() considers whether this instance needs to
* dispatch "beforeinput" event or not. Then,
* mHasTriedToDispatchBeforeInputEvent is set to true.
*
* @param aDeleteDirectionAndAmount
* If `MayEditActionDeleteAroundCollapsedSelection(
* mEditAction)` returns true, this must be set.
* Otherwise, don't set explicitly.
* @return If this method actually dispatches "beforeinput" event
* and it's canceled, returns
* NS_ERROR_EDITOR_ACTION_CANCELED.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult MaybeDispatchBeforeInputEvent(
nsIEditor::EDirection aDeleteDirectionAndAmount = nsIEditor::eNone);
/**
* MarkAsBeforeInputHasBeenDispatched() should be called only when updating
* the DOM occurs asynchronously from user input (e.g., inserting blob
* object which is loaded asynchronously) and `beforeinput` has already
* been dispatched (always should be so).
*/
void MarkAsBeforeInputHasBeenDispatched() {
MOZ_ASSERT(!HasTriedToDispatchBeforeInputEvent());
MOZ_ASSERT(mEditAction == EditAction::ePaste ||
mEditAction == EditAction::ePasteAsQuotation ||
mEditAction == EditAction::eDrop);
mHasTriedToDispatchBeforeInputEvent = true;
}
/**
* MarkAsHandled() is called before dispatching `input` event and notifying
* editor observers. After this is called, any nested edit action become
* non illegal case.
*/
void MarkAsHandled() {
MOZ_ASSERT(!mHandled);
mHandled = true;
}
/**
* ShouldAlreadyHaveHandledBeforeInputEventDispatching() returns true if the
* edit action requires to handle "beforeinput" event but not yet dispatched
* it nor considered as not dispatched it and can dispatch it when this is
* called.
*/
bool ShouldAlreadyHaveHandledBeforeInputEventDispatching() const {
return !HasTriedToDispatchBeforeInputEvent() &&
NeedsBeforeInputEventHandling(mEditAction) &&
IsBeforeInputEventEnabled() /* &&
// If we still need to dispatch a clipboard event, we should
// dispatch it first, then, we need to dispatch beforeinput
// event later.
!NeedsToDispatchClipboardEvent()*/
;
}
/**
* HasTriedToDispatchBeforeInputEvent() returns true if the instance's
* MaybeDispatchBeforeInputEvent() has already been called.
*/
bool HasTriedToDispatchBeforeInputEvent() const {
return mHasTriedToDispatchBeforeInputEvent;
}
bool IsCanceled() const { return mBeforeInputEventCanceled; }
/**
* Returns a `Selection` for normal selection. The lifetime is guaranteed
* during alive this instance in the stack.
*/
MOZ_KNOWN_LIVE Selection& SelectionRef() const {
MOZ_ASSERT(!mSelection ||
(mSelection->GetType() == SelectionType::eNormal));
return *mSelection;
}
nsIPrincipal* GetPrincipal() const { return mPrincipal; }
EditAction GetEditAction() const { return mEditAction; }
template <typename PT, typename CT>
void SetSpellCheckRestartPoint(const EditorDOMPointBase<PT, CT>& aPoint) {
MOZ_ASSERT(aPoint.IsSet());
// We should store only container and offset because new content may
// be inserted before referring child.
// XXX Shouldn't we compare whether aPoint is before
// mSpellCheckRestartPoint if it's set.
mSpellCheckRestartPoint =
EditorDOMPoint(aPoint.GetContainer(), aPoint.Offset());
}
void ClearSpellCheckRestartPoint() { mSpellCheckRestartPoint.Clear(); }
const EditorDOMPoint& GetSpellCheckRestartPoint() const {
return mSpellCheckRestartPoint;
}
void SetData(const nsAString& aData) {
MOZ_ASSERT(!mHasTriedToDispatchBeforeInputEvent,
"It's too late to set data since this may have already "
"dispatched a beforeinput event");
mData = aData;
}
const nsString& GetData() const { return mData; }
void SetColorData(const nsAString& aData);
/**
* InitializeDataTransfer(DataTransfer*) sets mDataTransfer to
* aDataTransfer. In this case, aDataTransfer should not be read/write
* because it'll be set to InputEvent.dataTransfer and which should be
* read-only.
*/
void InitializeDataTransfer(dom::DataTransfer* aDataTransfer);
/**
* InitializeDataTransfer(nsITransferable*) creates new DataTransfer
* instance, initializes it with aTransferable and sets mDataTransfer to
* it.
*/
void InitializeDataTransfer(nsITransferable* aTransferable);
/**
* InitializeDataTransfer(const nsAString&) creates new DataTransfer
* instance, initializes it with aString and sets mDataTransfer to it.
*/
void InitializeDataTransfer(const nsAString& aString);
/**
* InitializeDataTransferWithClipboard() creates new DataTransfer instance,
* initializes it with clipboard and sets mDataTransfer to it.
*/
void InitializeDataTransferWithClipboard(
SettingDataTransfer aSettingDataTransfer, int32_t aClipboardType);
dom::DataTransfer* GetDataTransfer() const { return mDataTransfer; }
/**
* AppendTargetRange() appends aTargetRange to target ranges. This should
* be used only by edit action handlers which do not want to set target
* ranges to selection ranges.
*/
void AppendTargetRange(dom::StaticRange& aTargetRange);
/**
* Make dispatching `beforeinput` forcibly non-cancelable.
*/
void MakeBeforeInputEventNonCancelable() {
mMakeBeforeInputEventNonCancelable = true;
}
/**
* NotifyOfDispatchingClipboardEvent() is called after dispatching
* a clipboard event.
*/
void NotifyOfDispatchingClipboardEvent() {
MOZ_ASSERT(NeedsToDispatchClipboardEvent());
MOZ_ASSERT(!mHasTriedToDispatchClipboardEvent);
mHasTriedToDispatchClipboardEvent = true;
}
void Abort() { mAborted = true; }
bool IsAborted() const { return mAborted; }
void OnEditorDestroy() {
if (!mHandled && mHasTriedToDispatchBeforeInputEvent) {
// Remember the editor was destroyed only when this edit action is being
// handled because they are caused by mutation event listeners or
// something other unexpected event listeners. In the cases, new child
// edit action shouldn't been aborted.
mEditorWasDestroyedDuringHandlingEditAction = true;
}
if (mParentData) {
mParentData->OnEditorDestroy();
}
}
bool HasEditorDestroyedDuringHandlingEditAction() const {
return mEditorWasDestroyedDuringHandlingEditAction;
}
void SetTopLevelEditSubAction(EditSubAction aEditSubAction,
EDirection aDirection = eNone) {
mTopLevelEditSubAction = aEditSubAction;
TopLevelEditSubActionDataRef().Clear();
switch (mTopLevelEditSubAction) {
case EditSubAction::eInsertNode:
case EditSubAction::eMoveNode:
case EditSubAction::eCreateNode:
case EditSubAction::eSplitNode:
case EditSubAction::eInsertText:
case EditSubAction::eInsertTextComingFromIME:
case EditSubAction::eSetTextProperty:
case EditSubAction::eRemoveTextProperty:
case EditSubAction::eRemoveAllTextProperties:
case EditSubAction::eSetText:
case EditSubAction::eInsertLineBreak:
case EditSubAction::eInsertParagraphSeparator:
case EditSubAction::eCreateOrChangeList:
case EditSubAction::eIndent:
case EditSubAction::eOutdent:
case EditSubAction::eSetOrClearAlignment:
case EditSubAction::eCreateOrRemoveBlock:
case EditSubAction::eFormatBlockForHTMLCommand:
case EditSubAction::eMergeBlockContents:
case EditSubAction::eRemoveList:
case EditSubAction::eCreateOrChangeDefinitionListItem:
case EditSubAction::eInsertElement:
case EditSubAction::eInsertQuotation:
case EditSubAction::eInsertQuotedText:
case EditSubAction::ePasteHTMLContent:
case EditSubAction::eInsertHTMLSource:
case EditSubAction::eSetPositionToAbsolute:
case EditSubAction::eSetPositionToStatic:
case EditSubAction::eDecreaseZIndex:
case EditSubAction::eIncreaseZIndex:
MOZ_ASSERT(aDirection == eNext);
mDirectionOfTopLevelEditSubAction = eNext;
break;
case EditSubAction::eJoinNodes:
case EditSubAction::eDeleteText:
MOZ_ASSERT(aDirection == ePrevious);
mDirectionOfTopLevelEditSubAction = ePrevious;
break;
case EditSubAction::eUndo:
case EditSubAction::eRedo:
case EditSubAction::eComputeTextToOutput:
case EditSubAction::eCreatePaddingBRElementForEmptyEditor:
case EditSubAction::eNone:
case EditSubAction::eReplaceHeadWithHTMLSource:
MOZ_ASSERT(aDirection == eNone);
mDirectionOfTopLevelEditSubAction = eNone;
break;
case EditSubAction::eDeleteNode:
case EditSubAction::eDeleteSelectedContent:
// Unfortunately, eDeleteNode and eDeleteSelectedContent is used with
// any direction. We might have specific sub-action for each
// direction, but there are some points referencing
// eDeleteSelectedContent so that we should keep storing direction
// as-is for now.
mDirectionOfTopLevelEditSubAction = aDirection;
break;
}
}
EditSubAction GetTopLevelEditSubAction() const {
MOZ_ASSERT(IsDataAvailable());
return mTopLevelEditSubAction;
}
EDirection GetDirectionOfTopLevelEditSubAction() const {
return mDirectionOfTopLevelEditSubAction;
}
const TopLevelEditSubActionData& TopLevelEditSubActionDataRef() const {
return mParentData ? mParentData->TopLevelEditSubActionDataRef()
: mTopLevelEditSubActionData;
}
TopLevelEditSubActionData& TopLevelEditSubActionDataRef() {
return mParentData ? mParentData->TopLevelEditSubActionDataRef()
: mTopLevelEditSubActionData;
}
const EditSubActionData& EditSubActionDataRef() const {
return mEditSubActionData;
}
EditSubActionData& EditSubActionDataRef() { return mEditSubActionData; }
SelectionState& SavedSelectionRef() {
return mParentData ? mParentData->SavedSelectionRef() : mSavedSelection;
}
const SelectionState& SavedSelectionRef() const {
return mParentData ? mParentData->SavedSelectionRef() : mSavedSelection;
}
RangeUpdater& RangeUpdaterRef() {
return mParentData ? mParentData->RangeUpdaterRef() : mRangeUpdater;
}
const RangeUpdater& RangeUpdaterRef() const {
return mParentData ? mParentData->RangeUpdaterRef() : mRangeUpdater;
}
void UpdateSelectionCache(Selection& aSelection);
private:
bool IsBeforeInputEventEnabled() const;
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
MaybeFlushPendingNotifications() const;
static bool NeedsBeforeInputEventHandling(EditAction aEditAction) {
MOZ_ASSERT(aEditAction != EditAction::eNone);
switch (aEditAction) {
case EditAction::eNone:
// If we're not handling edit action, we don't need to handle
// "beforeinput" event.
case EditAction::eNotEditing:
// If we're being initialized, we may need to create a padding <br>
// element, but it shouldn't cause `beforeinput` event.
case EditAction::eInitializing:
// If we're just selecting or getting table cells, we shouldn't
// dispatch `beforeinput` event.
case NS_EDIT_ACTION_CASES_ACCESSING_TABLE_DATA_WITHOUT_EDITING:
// If raw level transaction API is used, the API user needs to handle
// both "beforeinput" event and "input" event if it's necessary.
case EditAction::eUnknown:
// Hiding/showing password affects only layout so that we don't need
// to handle beforeinput event for it.
case EditAction::eHidePassword:
// We don't need to dispatch "beforeinput" event before
// "compositionstart".
case EditAction::eStartComposition:
// We don't need to let web apps know the mode change.
case EditAction::eEnableOrDisableCSS:
case EditAction::eEnableOrDisableAbsolutePositionEditor:
case EditAction::eEnableOrDisableResizer:
case EditAction::eEnableOrDisableInlineTableEditingUI:
// We don't need to let contents in chrome's editor to know the size
// change.
case EditAction::eSetWrapWidth:
// While resizing or moving element, we update only shadow, i.e.,
// don't touch to the DOM in content. Therefore, we don't need to
// dispatch "beforeinput" event.
case EditAction::eResizingElement:
case EditAction::eMovingElement:
// Perhaps, we don't need to dispatch "beforeinput" event for
// padding `<br>` element for empty editor because it's internal
// handling and it should be occurred by another change.
case EditAction::eCreatePaddingBRElementForEmptyEditor:
return false;
default:
return true;
}
}
bool NeedsToDispatchClipboardEvent() const {
if (mHasTriedToDispatchClipboardEvent) {
return false;
}
switch (mEditAction) {
case EditAction::ePaste:
case EditAction::ePasteAsQuotation:
case EditAction::eCut:
case EditAction::eCopy:
return true;
default:
return false;
}
}
EditorBase& mEditorBase;
RefPtr<Selection> mSelection;
nsTArray<OwningNonNull<Selection>> mRetiredSelections;
// True if the selection was created by doubleclicking a word.
bool mSelectionCreatedByDoubleclick{false};
nsCOMPtr<nsIPrincipal> mPrincipal;
// EditAction may be nested, for example, a command may be executed
// from mutation event listener which is run while editor changes
// the DOM tree. In such case, we need to handle edit action separately.
AutoEditActionDataSetter* mParentData;
// Cached selection for HTMLEditor::AutoSelectionRestorer.
SelectionState mSavedSelection;
// Utility class object for maintaining preserved ranges.
RangeUpdater mRangeUpdater;
// The data should be set to InputEvent.data.
nsString mData;
// The dataTransfer should be set to InputEvent.dataTransfer.
RefPtr<dom::DataTransfer> mDataTransfer;
// They are used for result of InputEvent.getTargetRanges() of beforeinput.
OwningNonNullStaticRangeArray mTargetRanges;
// Start point where spell checker should check from. This is used only
// by TextEditor.
EditorDOMPoint mSpellCheckRestartPoint;
// Different from mTopLevelEditSubAction, its data should be stored only
// in the most ancestor AutoEditActionDataSetter instance since we don't
// want to pay the copying cost and sync cost.
TopLevelEditSubActionData mTopLevelEditSubActionData;
// Different from mTopLevelEditSubActionData, this stores temporaly data
// for current edit sub action.
EditSubActionData mEditSubActionData;
// mEditAction and mRawEditActions stores edit action. The difference of
// them is, if and only if edit actions are nested and parent edit action
// is one of trying to edit something, but nested one is not so, it's
// overwritten by the parent edit action.
EditAction mEditAction;
EditAction mRawEditAction;
// Different from its data, you can refer "current" AutoEditActionDataSetter
// instance's mTopLevelEditSubAction member since it's copied from the
// parent instance at construction and it's always cleared before this
// won't be overwritten and cleared before destruction.
EditSubAction mTopLevelEditSubAction;
EDirection mDirectionOfTopLevelEditSubAction;
bool mAborted;
// Set to true when this handles "beforeinput" event dispatching. Note
// that even if "beforeinput" event shouldn't be dispatched for this,
// instance, this is set to true when it's considered.
bool mHasTriedToDispatchBeforeInputEvent;
// Set to true if "beforeinput" event was dispatched and it's canceled.
bool mBeforeInputEventCanceled;
// Set to true if `beforeinput` event must not be cancelable even if
// its inputType is defined as cancelable by the standards.
bool mMakeBeforeInputEventNonCancelable;
// Set to true when the edit action handler tries to dispatch a clipboard
// event.
bool mHasTriedToDispatchClipboardEvent;
// The editor instance may be destroyed once temporarily if `document.write`
// etc runs. In such case, we should mark this flag of being handled
// edit action.
bool mEditorWasDestroyedDuringHandlingEditAction;
// This is set before dispatching `input` event and notifying editor
// observers.
bool mHandled;
#ifdef DEBUG
mutable bool mHasCanHandleChecked = false;
#endif // #ifdef DEBUG
AutoEditActionDataSetter() = delete;
AutoEditActionDataSetter(const AutoEditActionDataSetter& aOther) = delete;
};
void UpdateEditActionData(const nsAString& aData) {
mEditActionData->SetData(aData);
}
void NotifyOfDispatchingClipboardEvent() {
MOZ_ASSERT(mEditActionData);
mEditActionData->NotifyOfDispatchingClipboardEvent();
}
protected: // May be called by friends.
/****************************************************************************
* Some friend classes are allowed to call the following protected methods.
* However, those methods won't prepare caches of some objects which are
* necessary for them. So, if you call them from friend classes, you need
* to make sure that AutoEditActionDataSetter is created.
****************************************************************************/
bool IsEditActionCanceled() const {
MOZ_ASSERT(mEditActionData);
return mEditActionData->IsCanceled();
}
bool ShouldAlreadyHaveHandledBeforeInputEventDispatching() const {
MOZ_ASSERT(mEditActionData);
return mEditActionData
->ShouldAlreadyHaveHandledBeforeInputEventDispatching();
}
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult MaybeDispatchBeforeInputEvent() {
MOZ_ASSERT(mEditActionData);
return mEditActionData->MaybeDispatchBeforeInputEvent();
}
void MarkAsBeforeInputHasBeenDispatched() {
MOZ_ASSERT(mEditActionData);
return mEditActionData->MarkAsBeforeInputHasBeenDispatched();
}
bool HasTriedToDispatchBeforeInputEvent() const {
return mEditActionData &&
mEditActionData->HasTriedToDispatchBeforeInputEvent();
}
bool IsEditActionDataAvailable() const {
return mEditActionData && mEditActionData->IsDataAvailable();
}
bool IsTopLevelEditSubActionDataAvailable() const {
return mEditActionData && !!GetTopLevelEditSubAction();
}
bool IsEditActionAborted() const {
MOZ_ASSERT(mEditActionData);
return mEditActionData->IsAborted();
}
/**
* SelectionRef() returns cached normal Selection. This is pretty faster than
* EditorBase::GetSelection() if available.
* Note that this never crash unless public methods ignore the result of
* AutoEditActionDataSetter::CanHandle() and keep handling edit action but any
* methods should stop handling edit action if it returns false.
*/
MOZ_KNOWN_LIVE Selection& SelectionRef() const {
MOZ_ASSERT(mEditActionData);
MOZ_ASSERT(mEditActionData->SelectionRef().GetType() ==
SelectionType::eNormal);
return mEditActionData->SelectionRef();
}
nsIPrincipal* GetEditActionPrincipal() const {
MOZ_ASSERT(mEditActionData);
return mEditActionData->GetPrincipal();
}
/**
* GetEditAction() returns EditAction which is being handled. If some
* edit actions are nested, this returns the innermost edit action.
*/
EditAction GetEditAction() const {
return mEditActionData ? mEditActionData->GetEditAction()
: EditAction::eNone;
}
/**
* GetInputEventData() returns inserting or inserted text value with
* current edit action. The result is proper for InputEvent.data value.
*/
const nsString& GetInputEventData() const {
return mEditActionData ? mEditActionData->GetData() : VoidString();
}
/**
* GetInputEventDataTransfer() returns inserting or inserted transferable
* content with current edit action. The result is proper for
* InputEvent.dataTransfer value.
*/
dom::DataTransfer* GetInputEventDataTransfer() const {
return mEditActionData ? mEditActionData->GetDataTransfer() : nullptr;
}
/**
* GetTopLevelEditSubAction() returns the top level edit sub-action.
* For example, if selected content is being replaced with inserted text,
* while removing selected content, the top level edit sub-action may be
* EditSubAction::eDeleteSelectedContent. However, while inserting new
* text, the top level edit sub-action may be EditSubAction::eInsertText.
* So, this result means what we are doing right now unless you're looking
* for a case which the method is called via mutation event listener or
* selectionchange event listener which are fired while handling the edit
* sub-action.
*/
EditSubAction GetTopLevelEditSubAction() const {
return mEditActionData ? mEditActionData->GetTopLevelEditSubAction()
: EditSubAction::eNone;
}
/**
* GetDirectionOfTopLevelEditSubAction() returns direction which user
* intended for doing the edit sub-action.
*/
EDirection GetDirectionOfTopLevelEditSubAction() const {
return mEditActionData
? mEditActionData->GetDirectionOfTopLevelEditSubAction()
: eNone;
}
/**
* SavedSelection() returns reference to saved selection which are
* stored by HTMLEditor::AutoSelectionRestorer.
*/
SelectionState& SavedSelectionRef() {
MOZ_ASSERT(IsHTMLEditor());
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->SavedSelectionRef();
}
const SelectionState& SavedSelectionRef() const {
MOZ_ASSERT(IsHTMLEditor());
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->SavedSelectionRef();
}
RangeUpdater& RangeUpdaterRef() {
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->RangeUpdaterRef();
}
const RangeUpdater& RangeUpdaterRef() const {
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->RangeUpdaterRef();
}
template <typename PT, typename CT>
void SetSpellCheckRestartPoint(const EditorDOMPointBase<PT, CT>& aPoint) {
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->SetSpellCheckRestartPoint(aPoint);
}
void ClearSpellCheckRestartPoint() {
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->ClearSpellCheckRestartPoint();
}
const EditorDOMPoint& GetSpellCheckRestartPoint() const {
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->GetSpellCheckRestartPoint();
}
const TopLevelEditSubActionData& TopLevelEditSubActionDataRef() const {
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->TopLevelEditSubActionDataRef();
}
TopLevelEditSubActionData& TopLevelEditSubActionDataRef() {
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->TopLevelEditSubActionDataRef();
}
const EditSubActionData& EditSubActionDataRef() const {
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->EditSubActionDataRef();
}
EditSubActionData& EditSubActionDataRef() {
MOZ_ASSERT(IsEditActionDataAvailable());
return mEditActionData->EditSubActionDataRef();
}
/**
* GetFirstIMESelectionStartPoint() and GetLastIMESelectionEndPoint() returns
* start of first IME selection range or end of last IME selection range if
* there is. Otherwise, returns non-set DOM point.
*/
template <typename EditorDOMPointType>
EditorDOMPointType GetFirstIMESelectionStartPoint() const;
template <typename EditorDOMPointType>
EditorDOMPointType GetLastIMESelectionEndPoint() const;
/**
* IsSelectionRangeContainerNotContent() returns true if one of container
* of selection ranges is not a content node, i.e., a Document node.
*/
bool IsSelectionRangeContainerNotContent() const;
/**
* OnInputText() is called when user inputs text with keyboard or something.
*
* @param aStringToInsert The string to insert.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
OnInputText(const nsAString& aStringToInsert);
/**
* InsertTextAsSubAction() inserts aStringToInsert at selection. This
* should be used for handling it as an edit sub-action.
*
* @param aStringToInsert The string to insert.
* @param aSelectionHandling Specify whether selected content should be
* deleted or ignored.
*/
enum class SelectionHandling { Ignore, Delete };
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult InsertTextAsSubAction(
const nsAString& aStringToInsert, SelectionHandling aSelectionHandling);
/**
* Insert aStringToInsert to aPointToInsert or better insertion point around
* it. If aPointToInsert isn't in a text node, this method looks for the
* nearest point in a text node with TextEditor::FindBetterInsertionPoint()
* or EditorDOMPoint::GetPointInTextNodeIfPointingAroundTextNode().
* If there is no text node, this creates new text node and put
* aStringToInsert to it.
*
* @param aDocument The document of this editor.
* @param aStringToInsert The string to insert.
* @param aPointToInsert The point to insert aStringToInsert.
* Must be valid DOM point.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT virtual Result<InsertTextResult, nsresult>
InsertTextWithTransaction(Document& aDocument,
const nsAString& aStringToInsert,
const EditorDOMPoint& aPointToInsert);
/**
* Insert aStringToInsert to aPointToInsert.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<InsertTextResult, nsresult>
InsertTextIntoTextNodeWithTransaction(
const nsAString& aStringToInsert,
const EditorDOMPointInText& aPointToInsert);
/**
* SetTextNodeWithoutTransaction() is optimized path to set new value to
* the text node directly and without transaction. This is used when
* setting `<input>.value` and `<textarea>.value`.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
SetTextNodeWithoutTransaction(const nsAString& aString, Text& aTextNode);
/**
* DeleteNodeWithTransaction() removes aContent from the DOM tree.
*
* @param aContent The node which will be removed form the DOM tree.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
DeleteNodeWithTransaction(nsIContent& aContent);
/**
* InsertNodeWithTransaction() inserts aContentToInsert before the child
* specified by aPointToInsert.
*
* @param aContentToInsert The node to be inserted.
* @param aPointToInsert The insertion point of aContentToInsert.
* If this refers end of the container, the
* transaction will append the node to the
* container. Otherwise, will insert the node
* before child node referred by this.
* @return If succeeded, returns the new content node and
* point to put caret.
*/
template <typename ContentNodeType>
[[nodiscard]] MOZ_CAN_RUN_SCRIPT
Result<CreateNodeResultBase<ContentNodeType>, nsresult>
InsertNodeWithTransaction(ContentNodeType& aContentToInsert,
const EditorDOMPoint& aPointToInsert);
/**
* InsertPaddingBRElementForEmptyLastLineWithTransaction() creates a padding
* <br> element with setting flags to NS_PADDING_FOR_EMPTY_LAST_LINE and
* inserts it around aPointToInsert.
*
* @param aPointToInsert The DOM point where should be <br> node inserted
* before.
* @return If succeeded, returns the new <br> element and
* point to put caret around it.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CreateElementResult, nsresult>
InsertPaddingBRElementForEmptyLastLineWithTransaction(
const EditorDOMPoint& aPointToInsert);
/**
* CloneAttributesWithTransaction() clones all attributes from
* aSourceElement to aDestElement after removing all attributes in
* aDestElement.
*/
MOZ_CAN_RUN_SCRIPT void CloneAttributesWithTransaction(
Element& aDestElement, Element& aSourceElement);
/**
* CloneAttributeWithTransaction() copies aAttribute of aSourceElement to
* aDestElement. If aSourceElement doesn't have aAttribute, this removes
* aAttribute from aDestElement.
*
* @param aAttribute Attribute name to be cloned.
* @param aDestElement Element node which will be set aAttribute or
* whose aAttribute will be removed.
* @param aSourceElement Element node which provides the value of
* aAttribute in aDestElement.
*/
MOZ_CAN_RUN_SCRIPT nsresult CloneAttributeWithTransaction(
nsAtom& aAttribute, Element& aDestElement, Element& aSourceElement);
/**
* RemoveAttributeWithTransaction() removes aAttribute from aElement.
*
* @param aElement Element node which will lose aAttribute.
* @param aAttribute Attribute name to be removed from aElement.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
RemoveAttributeWithTransaction(Element& aElement, nsAtom& aAttribute);
MOZ_CAN_RUN_SCRIPT virtual nsresult RemoveAttributeOrEquivalent(
Element* aElement, nsAtom* aAttribute, bool aSuppressTransaction) = 0;
/**
* SetAttributeWithTransaction() sets aAttribute of aElement to aValue.
*
* @param aElement Element node which will have aAttribute.
* @param aAttribute Attribute name to be set.
* @param aValue Attribute value be set to aAttribute.
*/
MOZ_CAN_RUN_SCRIPT nsresult SetAttributeWithTransaction(
Element& aElement, nsAtom& aAttribute, const nsAString& aValue);
MOZ_CAN_RUN_SCRIPT virtual nsresult SetAttributeOrEquivalent(
Element* aElement, nsAtom* aAttribute, const nsAString& aValue,
bool aSuppressTransaction) = 0;
/**
* Method to replace certain CreateElementNS() calls.
*
* @param aTag Tag you want.
*/
already_AddRefed<Element> CreateHTMLContent(const nsAtom* aTag) const;
/**
* Creates text node which is marked as "maybe modified frequently" and
* "maybe masked" if this is a password editor.
*/
already_AddRefed<nsTextNode> CreateTextNode(const nsAString& aData) const;
/**
* DoInsertText(), DoDeleteText(), DoReplaceText() and DoSetText() are
* wrapper of `CharacterData::InsertData()`, `CharacterData::DeleteData()`,
* `CharacterData::ReplaceData()` and `CharacterData::SetData()`.
*/
MOZ_CAN_RUN_SCRIPT void DoInsertText(dom::Text& aText, uint32_t aOffset,
const nsAString& aStringToInsert,
ErrorResult& aRv);
MOZ_CAN_RUN_SCRIPT void DoDeleteText(dom::Text& aText, uint32_t aOffset,
uint32_t aCount, ErrorResult& aRv);
MOZ_CAN_RUN_SCRIPT void DoReplaceText(dom::Text& aText, uint32_t aOffset,
uint32_t aCount,
const nsAString& aStringToInsert,
ErrorResult& aRv);
MOZ_CAN_RUN_SCRIPT void DoSetText(dom::Text& aText,
const nsAString& aStringToSet,
ErrorResult& aRv);
/**
* Delete text in the range in aTextNode. Use
* `HTMLEditor::ReplaceTextWithTransaction` if you'll insert text there (and
* if you want to use it in `TextEditor`, move it into `EditorBase`).
*
* @param aTextNode The text node which should be modified.
* @param aOffset Start offset of removing text in aTextNode.
* @param aLength Length of removing text.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CaretPoint, nsresult>
DeleteTextWithTransaction(dom::Text& aTextNode, uint32_t aOffset,
uint32_t aLength);
/**
* MarkElementDirty() sets a special dirty attribute on the element.
* Usually this will be called immediately after creating a new node.
*
* @param aElement The element for which to insert formatting.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
MarkElementDirty(Element& aElement) const;
MOZ_CAN_RUN_SCRIPT nsresult
DoTransactionInternal(nsITransaction* aTransaction);
/**
* Returns true if aNode is our root node. The root is:
* If TextEditor, the anonymous <div> element.
* If HTMLEditor, a <body> element or the document element which may not be
* editable if it's not in the design mode.
*/
bool IsRoot(const nsINode* inNode) const;
/**
* Returns true if aNode is a descendant of our root node.
* See the comment for IsRoot() for what the root node means.
*/
bool IsDescendantOfRoot(const nsINode* inNode) const;
/**
* Returns true when inserting text should be a part of current composition.
*/
bool ShouldHandleIMEComposition() const;
template <typename EditorDOMPointType>
EditorDOMPointType GetFirstSelectionStartPoint() const;
template <typename EditorDOMPointType>
EditorDOMPointType GetFirstSelectionEndPoint() const;
static nsresult GetEndChildNode(const Selection& aSelection,
nsIContent** aEndNode);
template <typename PT, typename CT>
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
CollapseSelectionTo(const EditorDOMPointBase<PT, CT>& aPoint) const {
// We don't need to throw exception directly for a failure of updating
// selection. Therefore, let's use IgnoredErrorResult for the performance.
IgnoredErrorResult error;
CollapseSelectionTo(aPoint, error);
return error.StealNSResult();
}
template <typename PT, typename CT>
MOZ_CAN_RUN_SCRIPT void CollapseSelectionTo(
const EditorDOMPointBase<PT, CT>& aPoint, ErrorResult& aRv) const {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!aRv.Failed());
if (aPoint.GetInterlinePosition() != InterlinePosition::Undefined) {
if (MOZ_UNLIKELY(NS_FAILED(SelectionRef().SetInterlinePosition(
aPoint.GetInterlinePosition())))) {
NS_WARNING("Selection::SetInterlinePosition() failed");
aRv.Throw(NS_ERROR_FAILURE);
return;
}
}
SelectionRef().CollapseInLimiter(aPoint, aRv);
if (MOZ_UNLIKELY(Destroyed())) {
NS_WARNING("Selection::CollapseInLimiter() caused destroying the editor");
aRv.Throw(NS_ERROR_EDITOR_DESTROYED);
return;
}
NS_WARNING_ASSERTION(!aRv.Failed(),
"Selection::CollapseInLimiter() failed");
}
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
CollapseSelectionToStartOf(nsINode& aNode) const {
return CollapseSelectionTo(EditorRawDOMPoint(&aNode, 0u));
}
MOZ_CAN_RUN_SCRIPT void CollapseSelectionToStartOf(nsINode& aNode,
ErrorResult& aRv) const {
CollapseSelectionTo(EditorRawDOMPoint(&aNode, 0u), aRv);
}
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
CollapseSelectionToEndOf(nsINode& aNode) const {
return CollapseSelectionTo(EditorRawDOMPoint::AtEndOf(aNode));
}
MOZ_CAN_RUN_SCRIPT void CollapseSelectionToEndOf(nsINode& aNode,
ErrorResult& aRv) const {
CollapseSelectionTo(EditorRawDOMPoint::AtEndOf(aNode), aRv);
}
/**
* AllowsTransactionsToChangeSelection() returns true if editor allows any
* transactions to change Selection. Otherwise, transactions shouldn't
* change Selection.
*/
inline bool AllowsTransactionsToChangeSelection() const {
return mAllowsTransactionsToChangeSelection;
}
/**
* MakeThisAllowTransactionsToChangeSelection() with true makes this editor
* allow transactions to change Selection. Otherwise, i.e., with false,
* makes this editor not allow transactions to change Selection.
*/
inline void MakeThisAllowTransactionsToChangeSelection(bool aAllow) {
mAllowsTransactionsToChangeSelection = aAllow;
}
nsresult HandleInlineSpellCheck(
const EditorDOMPoint& aPreviouslySelectedStart,
const dom::AbstractRange* aRange = nullptr);
/**
* Whether the editor is active on the DOM window. Note that when this
* returns true but GetFocusedElement() returns null, it means that this
* editor was focused when the DOM window was active.
*/
virtual bool IsActiveInDOMWindow() const;
/**
* HideCaret() hides caret with nsCaret::AddForceHide() or may show carent
* with nsCaret::RemoveForceHide(). This does NOT set visibility of
* nsCaret. Therefore, this is stateless.
*/
void HideCaret(bool aHide);
protected: // Edit sub-action handler
/**
* AutoCaretBidiLevelManager() computes bidi level of caret, deleting
* character(s) from aPointAtCaret at construction. Then, if you'll
* need to extend the selection, you should calls `UpdateCaretBidiLevel()`,
* then, this class may update caret bidi level for you if it's required.
*/
class MOZ_RAII AutoCaretBidiLevelManager final {
public:
/**
* @param aEditorBase The editor.
* @param aPointAtCaret Collapsed `Selection` point.
* @param aDirectionAndAmount The direction and amount to delete.
*/
template <typename PT, typename CT>
AutoCaretBidiLevelManager(const EditorBase& aEditorBase,
nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPointBase<PT, CT>& aPointAtCaret);
/**
* Failed() returns true if the constructor failed to handle the bidi
* information.
*/
bool Failed() const { return mFailed; }
/**
* Canceled() returns true if when the caller should stop deleting
* characters since caret position is not visually adjacent the deleting
* characters and user does not wand to delete them in that case.
*/
bool Canceled() const { return mCanceled; }
/**
* MaybeUpdateCaretBidiLevel() may update caret bidi level and schedule to
* paint it if they are necessary.
*/
void MaybeUpdateCaretBidiLevel(const EditorBase& aEditorBase) const;
private:
Maybe<mozilla::intl::BidiEmbeddingLevel> mNewCaretBidiLevel;
bool mFailed = false;
bool mCanceled = false;
};
/**
* UndefineCaretBidiLevel() resets bidi level of the caret.
*/
void UndefineCaretBidiLevel() const;
/**
* Flushing pending notifications if nsFrameSelection requires the latest
* layout information to compute deletion range. This may destroy the
* editor instance itself. When this returns false, don't keep doing
* anything.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT bool
FlushPendingNotificationsIfToHandleDeletionWithFrameSelection(
nsIEditor::EDirection aDirectionAndAmount) const;
/**
* DeleteSelectionAsSubAction() removes selection content or content around
* caret with transactions. This should be used for handling it as an
* edit sub-action.
*
* @param aDirectionAndAmount How much range should be removed.
* @param aStripWrappers Whether the parent blocks should be removed
* when they become empty. If this instance is
* a TextEditor, Must be nsIEditor::eNoStrip.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
DeleteSelectionAsSubAction(nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers);
/**
* This method handles "delete selection" commands.
* NOTE: Don't call this method recursively from the helper methods since
* when nobody handled it without canceling and returing an error,
* this falls it back to `DeleteSelectionWithTransaction()`.
*
* @param aDirectionAndAmount Direction of the deletion.
* @param aStripWrappers Must be nsIEditor::eNoStrip if this is a
* TextEditor instance. Otherwise,
* nsIEditor::eStrip is also valid.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT virtual Result<EditActionResult, nsresult>
HandleDeleteSelection(nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers) = 0;
/**
* ReplaceSelectionAsSubAction() replaces selection with aString.
*
* @param aString The string to replace.
*/
MOZ_CAN_RUN_SCRIPT nsresult
ReplaceSelectionAsSubAction(const nsAString& aString);
/**
* HandleInsertText() handles inserting text at selection.
*
* @param aEditSubAction Must be EditSubAction::eInsertText or
* EditSubAction::eInsertTextComingFromIME.
* @param aInsertionString String to be inserted at selection.
* @param aSelectionHandling Specify whether selected content should be
* deleted or ignored.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT virtual Result<EditActionResult, nsresult>
HandleInsertText(EditSubAction aEditSubAction,
const nsAString& aInsertionString,
SelectionHandling aSelectionHandling) = 0;
/**
* InsertWithQuotationsAsSubAction() inserts aQuotedText with appending ">"
* to start of every line.
*
* @param aQuotedText String to insert. This will be quoted by ">"
* automatically.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT virtual nsresult
InsertWithQuotationsAsSubAction(const nsAString& aQuotedText) = 0;
/**
* PrepareInsertContent() is a helper method of InsertTextAt(),
* HTMLEditor::HTMLWithContextInserter::Run(). They insert content coming
* from clipboard or drag and drop. Before that, they may need to remove
* selected contents and adjust selection. This does them instead.
*
* @param aPointToInsert Point to insert. Must be set. Callers
* shouldn't use this instance after calling this
* method because this method may cause changing
* the DOM tree and Selection.
*/
enum class DeleteSelectedContent : bool {
No, // Don't delete selection
Yes, // Delete selected content
};
MOZ_CAN_RUN_SCRIPT nsresult
PrepareToInsertContent(const EditorDOMPoint& aPointToInsert,
DeleteSelectedContent aDeleteSelectedContent);
/**
* InsertTextAt() inserts aStringToInsert at aPointToInsert.
*
* @param aStringToInsert The string which you want to insert.
* @param aPointToInsert The insertion point.
*/
MOZ_CAN_RUN_SCRIPT nsresult InsertTextAt(
const nsAString& aStringToInsert, const EditorDOMPoint& aPointToInsert,
DeleteSelectedContent aDeleteSelectedContent);
/**
* Return whether the data is safe to insert as the source and destination
* principals match, or we are in a editor context where this doesn't matter.
* Otherwise, the data must be sanitized first.
*/
enum class SafeToInsertData : bool { No, Yes };
SafeToInsertData IsSafeToInsertData(nsIPrincipal* aSourcePrincipal) const;
protected: // Called by helper classes.
/**
* OnStartToHandleTopLevelEditSubAction() is called when
* GetTopLevelEditSubAction() is EditSubAction::eNone and somebody starts to
* handle aEditSubAction.
*
* @param aTopLevelEditSubAction Top level edit sub action which
* will be handled soon.
* @param aDirectionOfTopLevelEditSubAction Direction of aEditSubAction.
*/
MOZ_CAN_RUN_SCRIPT virtual void OnStartToHandleTopLevelEditSubAction(
EditSubAction aTopLevelEditSubAction,
nsIEditor::EDirection aDirectionOfTopLevelEditSubAction,
ErrorResult& aRv);
/**
* OnEndHandlingTopLevelEditSubAction() is called after
* SetTopLevelEditSubAction() is handled.
*/
MOZ_CAN_RUN_SCRIPT virtual nsresult OnEndHandlingTopLevelEditSubAction();
/**
* OnStartToHandleEditSubAction() and OnEndHandlingEditSubAction() are called
* when starting to handle an edit sub action and ending handling an edit
* sub action.
*/
void OnStartToHandleEditSubAction() { EditSubActionDataRef().Clear(); }
void OnEndHandlingEditSubAction() { EditSubActionDataRef().Clear(); }
/**
* (Begin|End)PlaceholderTransaction() are called by AutoPlaceholderBatch.
* This set of methods are similar to the (Begin|End)Transaction(), but do
* not use the transaction managers batching feature. Instead we use a
* placeholder transaction to wrap up any further transaction while the
* batch is open. The advantage of this is that placeholder transactions
* can later merge, if needed. Merging is unavailable between transaction
* manager batches.
*/
MOZ_CAN_RUN_SCRIPT_BOUNDARY void BeginPlaceholderTransaction(
nsStaticAtom& aTransactionName, const char* aRequesterFuncName);
enum class ScrollSelectionIntoView { No, Yes };
MOZ_CAN_RUN_SCRIPT_BOUNDARY void EndPlaceholderTransaction(
ScrollSelectionIntoView aScrollSelectionIntoView,
const char* aRequesterFuncName);
void BeginUpdateViewBatch(const char* aRequesterFuncName);
MOZ_CAN_RUN_SCRIPT void EndUpdateViewBatch(const char* aRequesterFuncName);
/**
* Used by HTMLEditor::AutoTransactionBatch, nsIEditor::BeginTransaction
* and nsIEditor::EndTransation. After calling BeginTransactionInternal(),
* all transactions will be treated as an atomic transaction. I.e., two or
* more transactions are undid once.
* XXX What's the difference with PlaceholderTransaction? Should we always
* use it instead?
*/
MOZ_CAN_RUN_SCRIPT void BeginTransactionInternal(
const char* aRequesterFuncName);
MOZ_CAN_RUN_SCRIPT void EndTransactionInternal(
const char* aRequesterFuncName);
protected: // Shouldn't be used by friend classes
/**
* The default destructor. This should suffice. Should this be pure virtual
* for someone to derive from the EditorBase later? I don't believe so.
*/
virtual ~EditorBase();
/**
* @param aDocument The dom document interface being observed
* @param aRootElement
* This is the root of the editable section of this
* document. If it is null then we get root from document
* body.
* @param aSelectionController
* The selection controller of selections which will be
* used in this editor.
* @param aFlags Some of nsIEditor::eEditor*Mask flags.
*/
MOZ_CAN_RUN_SCRIPT nsresult
InitInternal(Document& aDocument, Element* aRootElement,
nsISelectionController& aSelectionController, uint32_t aFlags);
/**
* PostCreateInternal() should be called after InitInternal(), and is the time
* that the editor tells its documentStateObservers that the document has been
* created.
*/
MOZ_CAN_RUN_SCRIPT nsresult PostCreateInternal();
/**
* PreDestroyInternal() is called before the editor goes away, and gives the
* editor a chance to tell its documentStateObservers that the document is
* going away.
*/
MOZ_CAN_RUN_SCRIPT virtual void PreDestroyInternal();
MOZ_ALWAYS_INLINE EditorType GetEditorType() const {
return mIsHTMLEditorClass ? EditorType::HTML : EditorType::Text;
}
/**
* Check whether the caller can keep handling focus event.
*
* @param aOriginalEventTargetNode The original event target of the focus
* event.
*/
[[nodiscard]] bool CanKeepHandlingFocusEvent(
const nsINode& aOriginalEventTargetNode) const;
/**
* If this editor has skipped spell checking and not yet flushed, this runs
* the spell checker.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult FlushPendingSpellCheck();
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult EnsureEmptyTextFirstChild();
int32_t WrapWidth() const { return mWrapColumn; }
/**
* ToGenericNSResult() computes proper nsresult value for the editor users.
* This should be used only when public methods return result of internal
* methods.
*/
static inline nsresult ToGenericNSResult(nsresult aRv) {
switch (aRv) {
// If the editor is destroyed while handling an edit action, editor needs
// to stop handling it. However, editor throw exception in this case
// because Chrome does not throw exception even in this case.
case NS_ERROR_EDITOR_DESTROYED:
return NS_OK;
// If editor meets unexpected DOM tree due to modified by mutation event
// listener, editor needs to stop handling it. However, editor shouldn't
// return error for the users because Chrome does not throw exception in
// this case.
case NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE:
return NS_OK;
// If the editing action is canceled by event listeners, editor needs
// to stop handling it. However, editor shouldn't return error for
// the callers but they should be able to distinguish whether it's
// canceled or not. Although it's DOM specific code, let's return
// DOM_SUCCESS_DOM_NO_OPERATION here.
case NS_ERROR_EDITOR_ACTION_CANCELED:
return NS_SUCCESS_DOM_NO_OPERATION;
// If there is no selection range or editable selection ranges, editor
// needs to stop handling it. However, editor shouldn't return error for
// the callers to avoid throwing exception. However, they may want to
// check whether it works or not. Therefore, we should return
// NS_SUCCESS_DOM_NO_OPERATION instead.
case NS_ERROR_EDITOR_NO_EDITABLE_RANGE:
return NS_SUCCESS_DOM_NO_OPERATION;
// If CreateNodeResultBase::SuggestCaretPointTo etc is called with
// SuggestCaret::AndIgnoreTrivialErrors and CollapseSelectionTo returns
// non-critical error e.g., not NS_ERROR_EDITOR_DESTROYED, it returns
// this success code instead of actual error code for making the caller
// handle the case easier. Therefore, this should be mapped to NS_OK
// for the users of editor.
case NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR:
return NS_OK;
default:
return aRv;
}
}
/**
* GetDocumentCharsetInternal() returns charset of the document.
*/
nsresult GetDocumentCharsetInternal(nsACString& aCharset) const;
/**
* ComputeValueInternal() computes string value of this editor for given
* format. This may be too expensive if it's in hot path.
*
* @param aFormatType MIME type like "text/plain".
* @param aDocumentEncoderFlags Flags of nsIDocumentEncoder.
* @param aCharset Encoding of the document.
*/
nsresult ComputeValueInternal(const nsAString& aFormatType,
uint32_t aDocumentEncoderFlags,
nsAString& aOutputString) const;
/**
* GetAndInitDocEncoder() returns a document encoder instance for aFormatType
* after initializing it. The result may be cached for saving recreation
* cost.
*
* @param aFormatType MIME type like "text/plain".
* @param aDocumentEncoderFlags Flags of nsIDocumentEncoder.
* @param aCharset Encoding of the document.
*/
already_AddRefed<nsIDocumentEncoder> GetAndInitDocEncoder(
const nsAString& aFormatType, uint32_t aDocumentEncoderFlags,
const nsACString& aCharset) const;
/**
* EnsurePaddingBRElementInMultilineEditor() creates a padding `<br>` element
* at end of multiline text editor.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
EnsurePaddingBRElementInMultilineEditor();
/**
* SelectAllInternal() should be used instead of SelectAll() in editor
* because SelectAll() creates AutoEditActionSetter but we should avoid
* to create it as far as possible.
*/
MOZ_CAN_RUN_SCRIPT virtual nsresult SelectAllInternal();
nsresult DetermineCurrentDirection();
/**
* DispatchInputEvent() dispatches an "input" event synchronously or
* asynchronously if it's not safe to dispatch.
*/
MOZ_CAN_RUN_SCRIPT void DispatchInputEvent();
/**
* Called after a transaction is done successfully.
*/
MOZ_CAN_RUN_SCRIPT void DoAfterDoTransaction(nsITransaction* aTransaction);
/**
* Called after a transaction is undone successfully.
*/
MOZ_CAN_RUN_SCRIPT void DoAfterUndoTransaction();
/**
* Called after a transaction is redone successfully.
*/
MOZ_CAN_RUN_SCRIPT void DoAfterRedoTransaction();
/**
* Tell the doc state listeners that the doc state has changed.
*/
enum TDocumentListenerNotification {
eDocumentCreated,
eDocumentToBeDestroyed,
eDocumentStateChanged
};
MOZ_CAN_RUN_SCRIPT nsresult
NotifyDocumentListeners(TDocumentListenerNotification aNotificationType);
/**
* Make the given selection span the entire document.
*/
MOZ_CAN_RUN_SCRIPT virtual nsresult SelectEntireDocument() = 0;
/**
* Helper method for scrolling the selection into view after
* an edit operation.
*
* Editor methods *should* call this method instead of the versions
* in the various selection interfaces, since this makes sure that
* the editor's sync/async settings for reflowing, painting, and scrolling
* match.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
ScrollSelectionFocusIntoView() const;
virtual nsresult InstallEventListeners();
virtual void CreateEventListeners();
void RemoveEventListeners();
[[nodiscard]] bool IsListeningToEvents() const;
/**
* Called if and only if this editor is in readonly mode.
*/
void HandleKeyPressEventInReadOnlyMode(
WidgetKeyboardEvent& aKeyboardEvent) const;
/**
* Get the input event target. This might return null.
*/
virtual already_AddRefed<Element> GetInputEventTargetElement() const = 0;
/**
* Return true if spellchecking should be enabled for this editor.
*/
[[nodiscard]] bool GetDesiredSpellCheckState();
[[nodiscard]] bool CanEnableSpellCheck() const {
// Check for password/readonly/disabled, which are not spellchecked
// regardless of DOM. Also, check to see if spell check should be skipped
// or not.
return !IsPasswordEditor() && !IsReadonly() && !ShouldSkipSpellCheck();
}
/**
* InitializeSelectionAncestorLimit() is called by InitializeSelection().
* When this is called, each implementation has to call
* Selection::SetAncestorLimiter() with aAnotherLimit.
*
* @param aAncestorLimit New ancestor limit of Selection. This always
* has parent node. So, it's always safe to
* call SetAncestorLimit() with this node.
*/
virtual void InitializeSelectionAncestorLimit(
nsIContent& aAncestorLimit) const;
/**
* Initializes selection and caret for the editor at getting focus. If
* aOriginalEventTargetNode isn't a host of the editor, i.e., the editor
* doesn't get focus, this does nothing.
*
* @param aOriginalEventTargetNode The original event target node of the
* focus event.
*/
MOZ_CAN_RUN_SCRIPT nsresult
InitializeSelection(const nsINode& aOriginalEventTargetNode);
enum NotificationForEditorObservers {
eNotifyEditorObserversOfEnd,
eNotifyEditorObserversOfBefore,
eNotifyEditorObserversOfCancel
};
MOZ_CAN_RUN_SCRIPT void NotifyEditorObservers(
NotificationForEditorObservers aNotification);
/**
* HowToHandleCollapsedRange indicates how collapsed range should be treated.
*/
enum class HowToHandleCollapsedRange {
// Ignore collapsed range.
Ignore,
// Extend collapsed range for removing previous content.
ExtendBackward,
// Extend collapsed range for removing next content.
ExtendForward,
};
static HowToHandleCollapsedRange HowToHandleCollapsedRangeFor(
nsIEditor::EDirection aDirectionAndAmount) {
switch (aDirectionAndAmount) {
case nsIEditor::eNone:
return HowToHandleCollapsedRange::Ignore;
case nsIEditor::ePrevious:
return HowToHandleCollapsedRange::ExtendBackward;
case nsIEditor::eNext:
return HowToHandleCollapsedRange::ExtendForward;
case nsIEditor::ePreviousWord:
case nsIEditor::eNextWord:
case nsIEditor::eToBeginningOfLine:
case nsIEditor::eToEndOfLine:
// If the amount is word or
// line,`AutoRangeArray::ExtendAnchorFocusRangeFor()` must have already
// been extended collapsed ranges before.
return HowToHandleCollapsedRange::Ignore;
}
MOZ_ASSERT_UNREACHABLE("Invalid nsIEditor::EDirection value");
return HowToHandleCollapsedRange::Ignore;
}
/**
* InsertDroppedDataTransferAsAction() inserts all data items in aDataTransfer
* at aDroppedAt unless the editor is destroyed.
*
* @param aEditActionData The edit action data whose edit action must be
* EditAction::eDrop.
* @param aDataTransfer The data transfer object which is dropped.
* @param aDroppedAt The DOM tree position whether aDataTransfer
* is dropped.
* @param aSourcePrincipal Principal of the source of the drag.
* May be nullptr if it comes from another app
* or process.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT virtual nsresult
InsertDroppedDataTransferAsAction(AutoEditActionDataSetter& aEditActionData,
dom::DataTransfer& aDataTransfer,
const EditorDOMPoint& aDroppedAt,
nsIPrincipal* aSourcePrincipal) = 0;
/**
* DeleteSelectionByDragAsAction() removes selection and dispatch "input"
* event whose inputType is "deleteByDrag".
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
DeleteSelectionByDragAsAction(bool aDispatchInputEvent);
/**
* DeleteSelectionWithTransaction() removes selected content or content
* around caret with transactions and remove empty inclusive ancestor
* inline elements of collapsed selection after removing the contents.
*
* @param aDirectionAndAmount How much range should be removed.
* @param aStripWrappers Whether the parent blocks should be removed
* when they become empty.
* Note that this must be `nsIEditor::eNoStrip`
* if this is a TextEditor because anyway it'll
* be ignored.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult
DeleteSelectionWithTransaction(nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers);
/**
* DeleteRangeWithTransaction() removes content in aRangeToDelete or content
* around collapsed aRangeToDelete with transactions and remove empty
* inclusive ancestor inline elements of the collapsed range after removing
* the contents.
*
* @param aDirectionAndAmount How much range should be removed.
* @param aStripWrappers Whether the parent blocks should be removed
* when they become empty.
* Note that this must be `nsIEditor::eNoStrip`
* if this is a TextEditor because anyway it'll
* be ignored.
* @param aRangeToDelete The range to delete content.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CaretPoint, nsresult>
DeleteRangeWithTransaction(nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
nsRange& aRangeToDelete);
/**
* DeleteRangesWithTransaction() removes content in aRangesToDelete or content
* around collapsed ranges in aRangesToDelete with transactions and remove
* empty inclusive ancestor inline elements of collapsed ranges after
* removing the contents.
*
* @param aDirectionAndAmount How much range should be removed.
* @param aStripWrappers Whether the parent blocks should be removed
* when they become empty.
* Note that this must be `nsIEditor::eNoStrip`
* if this is a TextEditor because anyway it'll
* be ignored.
* @param aRangesToDelete The ranges to delete content.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<CaretPoint, nsresult>
DeleteRangesWithTransaction(nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
const AutoRangeArray& aRangesToDelete);
/**
* Create a transaction for delete the content in aRangesToDelete.
* The result may include DeleteRangeTransaction (for deleting non-collapsed
* range), DeleteNodeTransactions and DeleteTextTransactions (for deleting
* collapsed range) as its children.
*
* @param aHowToHandleCollapsedRange
* How to handle collapsed ranges.
* @param aRangesToDelete The ranges to delete content.
*/
already_AddRefed<DeleteMultipleRangesTransaction>
CreateTransactionForDeleteSelection(
HowToHandleCollapsedRange aHowToHandleCollapsedRange,
const AutoRangeArray& aRangesToDelete);
/**
* Create a DeleteNodeTransaction or DeleteTextTransaction for removing a
* nodes or some text around aRangeToDelete.
*
* @param aCollapsedRange The range to be removed. This must be
* collapsed.
* @param aHowToHandleCollapsedRange
* How to handle aCollapsedRange. Must
* be HowToHandleCollapsedRange::ExtendBackward or
* HowToHandleCollapsedRange::ExtendForward.
*/
already_AddRefed<DeleteContentTransactionBase>
CreateTransactionForCollapsedRange(
const nsRange& aCollapsedRange,
HowToHandleCollapsedRange aHowToHandleCollapsedRange);
/**
* ComputeInsertedRange() returns actual range modified by inserting string
* in a text node. If mutation event listener changed the text data, this
* returns a range which covers all over the text data.
*/
std::tuple<EditorDOMPointInText, EditorDOMPointInText> ComputeInsertedRange(
const EditorDOMPointInText& aInsertedPoint,
const nsAString& aInsertedString) const;
/**
* EnsureComposition() should be called by composition event handlers. This
* tries to get the composition for the event and set it to mComposition.
* However, this may fail because the composition may be committed before
* the event comes to the editor.
*
* @return true if there is a composition. Otherwise, for example,
* a composition event handler in web contents moved focus
* for committing the composition, returns false.
*/
bool EnsureComposition(WidgetCompositionEvent& aCompositionEvent);
/**
* See comment of IsCopyToClipboardAllowed() for the detail.
*/
virtual bool IsCopyToClipboardAllowedInternal() const {
MOZ_ASSERT(IsEditActionDataAvailable());
return !SelectionRef().IsCollapsed();
}
/**
* Helper for Is{Cut|Copy}CommandEnabled.
* Look for a listener for the given command, including up the target chain.
*/
MOZ_CAN_RUN_SCRIPT bool CheckForClipboardCommandListener(
nsAtom* aCommand, EventMessage aEventMessage) const;
/**
* DispatchClipboardEventAndUpdateClipboard() may dispatch a clipboard event
* and update clipboard if aEventMessage is eCopy or eCut.
*
* @param aEventMessage The event message which may be set to the
* dispatching event.
* @param aClipboardType Working with global clipboard or selection.
*/
enum class ClipboardEventResult {
// We have met an error in nsCopySupport::FireClipboardEvent,
// or, default of dispatched event is NOT prevented, the event is "cut"
// and the event target is not editable.
IgnoredOrError,
// A "paste" event is dispatched and prevented its default.
DefaultPreventedOfPaste,
// Default of a "copy" or "cut" event is prevented but the clipboard is
// updated unless the dataTransfer of the event is cleared by the listener.
// Or, default of the event is NOT prevented but selection is collapsed
// when the event target is editable or the event is "copy".
CopyOrCutHandled,
// A clipboard event is maybe dispatched and not canceled by the web app.
// In this case, the clipboard has been updated if aEventMessage is eCopy
// or eCut.
DoDefault,
};
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<ClipboardEventResult, nsresult>
DispatchClipboardEventAndUpdateClipboard(EventMessage aEventMessage,
int32_t aClipboardType);
/**
* Called after PasteAsAction() dispatches "paste" event and it's not
* canceled.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT virtual nsresult HandlePaste(
AutoEditActionDataSetter& aEditActionData, int32_t aClipboardType) = 0;
/**
* Called after PasteAsQuotationAsAction() dispatches "paste" event and it's
* not canceled.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT virtual nsresult HandlePasteAsQuotation(
AutoEditActionDataSetter& aEditActionData, int32_t aClipboardType) = 0;
/**
* Called after PasteTransferableAsAction() dispatches "paste" event and it's
* not canceled.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT virtual nsresult HandlePasteTransferable(
AutoEditActionDataSetter& aEditActionData,
nsITransferable& aTransferable) = 0;
private:
nsCOMPtr<nsISelectionController> mSelectionController;
RefPtr<Document> mDocument;
AutoEditActionDataSetter* mEditActionData;
/**
* SetTextDirectionTo() sets text-direction of the root element.
* Should use SwitchTextDirectionTo() or ToggleTextDirection() instead.
* This is a helper class of them.
*/
nsresult SetTextDirectionTo(TextDirection aTextDirection);
protected: // helper classes which may be used by friends
/**
* Stack based helper class for batching a collection of transactions inside
* a placeholder transaction. Different from AutoTransactionBatch, this
* notifies editor observers of before/end edit action handling, and
* dispatches "input" event if it's necessary.
*/
class MOZ_RAII AutoPlaceholderBatch final {
public:
/**
* @param aRequesterFuncName function name which wants to end the batch.
* This won't be stored nor exposed to selection listeners etc, used only
* for logging. This MUST be alive when the destructor runs.
*/
AutoPlaceholderBatch(EditorBase& aEditorBase,
ScrollSelectionIntoView aScrollSelectionIntoView,
const char* aRequesterFuncName)
: mEditorBase(aEditorBase),
mScrollSelectionIntoView(aScrollSelectionIntoView),
mRequesterFuncName(aRequesterFuncName) {
mEditorBase->BeginPlaceholderTransaction(*nsGkAtoms::_empty,
mRequesterFuncName);
}
AutoPlaceholderBatch(EditorBase& aEditorBase,
nsStaticAtom& aTransactionName,
ScrollSelectionIntoView aScrollSelectionIntoView,
const char* aRequesterFuncName)
: mEditorBase(aEditorBase),
mScrollSelectionIntoView(aScrollSelectionIntoView),
mRequesterFuncName(aRequesterFuncName) {
mEditorBase->BeginPlaceholderTransaction(aTransactionName,
mRequesterFuncName);
}
~AutoPlaceholderBatch() {
mEditorBase->EndPlaceholderTransaction(mScrollSelectionIntoView,
mRequesterFuncName);
}
protected:
const OwningNonNull<EditorBase> mEditorBase;
const ScrollSelectionIntoView mScrollSelectionIntoView;
const char* const mRequesterFuncName;
};
/**
* AutoEditSubActionNotifier notifies editor of start to handle
* top level edit sub-action and end handling top level edit sub-action.
*/
class MOZ_RAII AutoEditSubActionNotifier final {
public:
MOZ_CAN_RUN_SCRIPT AutoEditSubActionNotifier(
EditorBase& aEditorBase, EditSubAction aEditSubAction,
nsIEditor::EDirection aDirection, ErrorResult& aRv)
: mEditorBase(aEditorBase), mIsTopLevel(true) {
// The top level edit sub action has already be set if this is nested call
// XXX Looks like that this is not aware of unexpected nested edit action
// handling via selectionchange event listener or mutation event
// listener.
if (!mEditorBase.GetTopLevelEditSubAction()) {
MOZ_KnownLive(mEditorBase)
.OnStartToHandleTopLevelEditSubAction(aEditSubAction, aDirection,
aRv);
} else {
mIsTopLevel = false;
}
mEditorBase.OnStartToHandleEditSubAction();
}
MOZ_CAN_RUN_SCRIPT ~AutoEditSubActionNotifier() {
mEditorBase.OnEndHandlingEditSubAction();
if (mIsTopLevel) {
MOZ_KnownLive(mEditorBase).OnEndHandlingTopLevelEditSubAction();
}
}
protected:
EditorBase& mEditorBase;
bool mIsTopLevel;
};
/**
* Stack based helper class for turning off active selection adjustment
* by low level transactions
*/
class MOZ_RAII AutoTransactionsConserveSelection final {
public:
explicit AutoTransactionsConserveSelection(EditorBase& aEditorBase)
: mEditorBase(aEditorBase),
mAllowedTransactionsToChangeSelection(
aEditorBase.AllowsTransactionsToChangeSelection()) {
mEditorBase.MakeThisAllowTransactionsToChangeSelection(false);
}
~AutoTransactionsConserveSelection() {
mEditorBase.MakeThisAllowTransactionsToChangeSelection(
mAllowedTransactionsToChangeSelection);
}
protected:
EditorBase& mEditorBase;
bool mAllowedTransactionsToChangeSelection;
};
/***************************************************************************
* stack based helper class for batching reflow and paint requests.
*/
class MOZ_RAII AutoUpdateViewBatch final {
public:
/**
* @param aRequesterFuncName function name which wants to end the batch.
* This won't be stored nor exposed to selection listeners etc, used only
* for logging. This MUST be alive when the destructor runs.
*/
MOZ_CAN_RUN_SCRIPT explicit AutoUpdateViewBatch(
EditorBase& aEditorBase, const char* aRequesterFuncName)
: mEditorBase(aEditorBase), mRequesterFuncName(aRequesterFuncName) {
mEditorBase.BeginUpdateViewBatch(mRequesterFuncName);
}
MOZ_CAN_RUN_SCRIPT ~AutoUpdateViewBatch() {
MOZ_KnownLive(mEditorBase).EndUpdateViewBatch(mRequesterFuncName);
}
protected:
EditorBase& mEditorBase;
const char* const mRequesterFuncName;
};
protected:
enum Tristate { eTriUnset, eTriFalse, eTriTrue };
// MIME type of the doc we are editing.
nsString mContentMIMEType;
RefPtr<mozInlineSpellChecker> mInlineSpellChecker;
// Reference to text services document for mInlineSpellChecker.
RefPtr<TextServicesDocument> mTextServicesDocument;
RefPtr<TransactionManager> mTransactionManager;
// Cached root node.
RefPtr<Element> mRootElement;
// The form field as an event receiver.
nsCOMPtr<dom::EventTarget> mEventTarget;
RefPtr<EditorEventListener> mEventListener;
// Strong reference to placeholder for begin/end batch purposes.
RefPtr<PlaceholderTransaction> mPlaceholderTransaction;
// Name of placeholder transaction.
nsStaticAtom* mPlaceholderName;
// Saved selection state for placeholder transaction batching.
mozilla::Maybe<SelectionState> mSelState;
// IME composition this is not null between compositionstart and
// compositionend.
RefPtr<TextComposition> mComposition;
RefPtr<TextInputListener> mTextInputListener;
RefPtr<IMEContentObserver> mIMEContentObserver;
// These members cache last encoder and its type for the performance in
// TextEditor::ComputeTextValue() which is the implementation of
// `<input>.value` and `<textarea>.value`. See `GetAndInitDocEncoder()`.
mutable nsCOMPtr<nsIDocumentEncoder> mCachedDocumentEncoder;
mutable nsString mCachedDocumentEncoderType;
// Listens to all low level actions on the doc.
// Edit action listener is currently used by highlighter of the findbar and
// the spellchecker. So, we should reserve only 2 items.
using AutoActionListenerArray =
AutoTArray<OwningNonNull<nsIEditActionListener>, 2>;
AutoActionListenerArray mActionListeners;
// Listen to overall doc state (dirty or not, just created, etc.).
// Document state listener is currently used by FinderHighlighter and
// BlueGriffon so that reserving only one is enough.
using AutoDocumentStateListenerArray =
AutoTArray<OwningNonNull<nsIDocumentStateListener>, 1>;
AutoDocumentStateListenerArray mDocStateListeners;
// Number of modifications (for undo/redo stack).
uint32_t mModCount;
// Behavior flags. See nsIEditor.idl for the flags we use.
uint32_t mFlags;
int32_t mUpdateCount;
// Nesting count for batching.
int32_t mPlaceholderBatch;
int32_t mWrapColumn = 0;
int32_t mNewlineHandling;
int32_t mCaretStyle;
// -1 = not initialized
int8_t mDocDirtyState;
// A Tristate value.
uint8_t mSpellcheckCheckboxState;
// If true, initialization was succeeded.
bool mInitSucceeded;
// If false, transactions should not change Selection even after modifying
// the DOM tree.
bool mAllowsTransactionsToChangeSelection;
// Whether PreDestroy has been called.
bool mDidPreDestroy;
// Whether PostCreate has been called.
bool mDidPostCreate;
bool mDispatchInputEvent;
// True while the instance is handling an edit sub-action.
bool mIsInEditSubAction;
// Whether caret is hidden forcibly.
bool mHidingCaret;
// Whether spellchecker dictionary is initialized after focused.
bool mSpellCheckerDictionaryUpdated;
// Whether we are an HTML editor class.
bool mIsHTMLEditorClass;
friend class AlignStateAtSelection; // AutoEditActionDataSetter,
// ToGenericNSResult
friend class AutoRangeArray; // IsSEditActionDataAvailable, SelectionRef
friend class CaretPoint; // AllowsTransactionsToChangeSelection,
// CollapseSelectionTo
friend class CompositionTransaction; // CollapseSelectionTo, DoDeleteText,
// DoInsertText, DoReplaceText,
// HideCaret, RangeupdaterRef
friend class DeleteNodeTransaction; // RangeUpdaterRef
friend class DeleteRangeTransaction; // AllowsTransactionsToChangeSelection,
// CollapseSelectionTo
friend class DeleteTextTransaction; // AllowsTransactionsToChangeSelection,
// DoDeleteText, DoInsertText,
// RangeUpdaterRef
friend class InsertNodeTransaction; // AllowsTransactionsToChangeSelection,
// CollapseSelectionTo,
// MarkElementDirty, ToGenericNSResult
friend class InsertTextTransaction; // AllowsTransactionsToChangeSelection,
// CollapseSelectionTo, DoDeleteText,
// DoInsertText, RangeUpdaterRef
friend class ListElementSelectionState; // AutoEditActionDataSetter,
// ToGenericNSResult
friend class ListItemElementSelectionState; // AutoEditActionDataSetter,
// ToGenericNSResult
friend class MoveNodeTransaction; // ToGenericNSResult
friend class ParagraphStateAtSelection; // AutoEditActionDataSetter,
// ToGenericNSResult
friend class PendingStyles; // GetEditAction,
// GetFirstSelectionStartPoint,
// SelectionRef
friend class ReplaceTextTransaction; // AllowsTransactionsToChangeSelection,
// CollapseSelectionTo, DoReplaceText,
// RangeUpdaterRef
friend class SplitNodeTransaction; // ToGenericNSResult
friend class WhiteSpaceVisibilityKeeper; // AutoTransactionsConserveSelection
friend class nsIEditor; // mIsHTMLEditorClass
};
} // namespace mozilla
bool nsIEditor::IsTextEditor() const {
return !AsEditorBase()->mIsHTMLEditorClass;
}
bool nsIEditor::IsHTMLEditor() const {
return AsEditorBase()->mIsHTMLEditorClass;
}
mozilla::EditorBase* nsIEditor::AsEditorBase() {
return static_cast<mozilla::EditorBase*>(this);
}
const mozilla::EditorBase* nsIEditor::AsEditorBase() const {
return static_cast<const mozilla::EditorBase*>(this);
}
#endif // #ifndef mozilla_EditorBase_h
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