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71b2579c1e
CanPasteTransferable and PreDestroy aren't used from script (inc. comm-central and bluegriffon), so we should move these to out of nsIEditor. MozReview-Commit-ID: GRfBobAm2qi --HG-- extra : rebase_source : 812792ff43da24bfd9cb99c4b3127e6acdc43ba1
377 lines
13 KiB
C++
377 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_TextEditor_h
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#define mozilla_TextEditor_h
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#include "mozilla/EditorBase.h"
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#include "nsCOMPtr.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsIEditor.h"
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#include "nsIEditorMailSupport.h"
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#include "nsIPlaintextEditor.h"
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#include "nsISupportsImpl.h"
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#include "nscore.h"
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class nsIContent;
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class nsIDocumentEncoder;
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class nsIOutputStream;
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class nsISelectionController;
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class nsITransferable;
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namespace mozilla {
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class AutoEditInitRulesTrigger;
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class HTMLEditRules;
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enum class EditAction : int32_t;
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namespace dom {
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class DragEvent;
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class Selection;
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} // namespace dom
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/**
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* The text editor implementation.
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* Use to edit text document represented as a DOM tree.
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*/
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class TextEditor : public EditorBase
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, public nsIPlaintextEditor
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, public nsIEditorMailSupport
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{
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(TextEditor, EditorBase)
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TextEditor();
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// nsIPlaintextEditor methods
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NS_DECL_NSIPLAINTEXTEDITOR
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// nsIEditorMailSupport overrides
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NS_DECL_NSIEDITORMAILSUPPORT
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// Overrides of nsIEditor
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NS_IMETHOD GetDocumentIsEmpty(bool* aDocumentIsEmpty) override;
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NS_IMETHOD DeleteSelection(EDirection aAction,
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EStripWrappers aStripWrappers) override;
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NS_IMETHOD SetDocumentCharacterSet(const nsACString& characterSet) override;
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// If there are some good name to create non-virtual Undo()/Redo() methods,
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// we should create them and those methods should just run them.
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NS_IMETHOD Undo(uint32_t aCount) final;
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NS_IMETHOD Redo(uint32_t aCount) final;
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NS_IMETHOD Cut() override;
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NS_IMETHOD CanCut(bool* aCanCut) override;
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NS_IMETHOD Copy() override;
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NS_IMETHOD CanCopy(bool* aCanCopy) override;
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NS_IMETHOD CanDelete(bool* aCanDelete) override;
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NS_IMETHOD Paste(int32_t aSelectionType) override;
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NS_IMETHOD CanPaste(int32_t aSelectionType, bool* aCanPaste) override;
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NS_IMETHOD PasteTransferable(nsITransferable* aTransferable) override;
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NS_IMETHOD OutputToString(const nsAString& aFormatType,
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uint32_t aFlags,
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nsAString& aOutputString) override;
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/** Can we paste |aTransferable| or, if |aTransferable| is null, will a call
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* to pasteTransferable later possibly succeed if given an instance of
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* nsITransferable then? True if the doc is modifiable, and, if
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* |aTransfeable| is non-null, we have pasteable data in |aTransfeable|.
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*/
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virtual bool CanPasteTransferable(nsITransferable* aTransferable);
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// Overrides of EditorBase
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virtual nsresult RemoveAttributeOrEquivalent(
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Element* aElement,
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nsAtom* aAttribute,
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bool aSuppressTransaction) override;
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virtual nsresult SetAttributeOrEquivalent(Element* aElement,
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nsAtom* aAttribute,
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const nsAString& aValue,
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bool aSuppressTransaction) override;
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using EditorBase::RemoveAttributeOrEquivalent;
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using EditorBase::SetAttributeOrEquivalent;
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virtual nsresult Init(nsIDocument& aDoc, Element* aRoot,
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nsISelectionController* aSelCon, uint32_t aFlags,
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const nsAString& aValue) override;
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nsresult DocumentIsEmpty(bool* aIsEmpty);
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/**
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* All editor operations which alter the doc should be prefaced
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* with a call to StartOperation, naming the action and direction.
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*/
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virtual nsresult StartOperation(EditAction opID,
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nsIEditor::EDirection aDirection) override;
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/**
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* All editor operations which alter the doc should be followed
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* with a call to EndOperation.
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*/
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virtual nsresult EndOperation() override;
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/**
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* Make the given selection span the entire document.
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*/
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virtual nsresult SelectEntireDocument(Selection* aSelection) override;
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virtual nsresult HandleKeyPressEvent(
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WidgetKeyboardEvent* aKeyboardEvent) override;
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virtual dom::EventTarget* GetDOMEventTarget() override;
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virtual already_AddRefed<nsIContent> GetInputEventTargetContent() override;
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/**
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* DeleteSelectionAsAction() removes selection content or content around
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* caret with transactions. This should be used for handling it as an
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* edit action.
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*
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* @param aDirection How much range should be removed.
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* @param aStripWrappers Whether the parent blocks should be removed
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* when they become empty.
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*/
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nsresult DeleteSelectionAsAction(EDirection aDirection,
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EStripWrappers aStripWrappers);
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/**
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* DeleteSelectionWithTransaction() removes selected content or content
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* around caret with transactions.
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*
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* @param aDirection How much range should be removed.
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* @param aStripWrappers Whether the parent blocks should be removed
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* when they become empty.
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*/
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virtual nsresult
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DeleteSelectionWithTransaction(EDirection aAction,
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EStripWrappers aStripWrappers);
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/**
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* OnInputText() is called when user inputs text with keyboard or something.
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*
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* @param aStringToInsert The string to insert.
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*/
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nsresult OnInputText(const nsAString& aStringToInsert);
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/**
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* OnInputParagraphSeparator() is called when user tries to separate current
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* paragraph with Enter key press or something.
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*/
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nsresult OnInputParagraphSeparator();
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/**
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* InsertTextAsAction() inserts aStringToInsert at selection.
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* Although this method is implementation of nsIPlaintextEditor.insertText(),
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* this treats the input is an edit action.
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*
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* @param aStringToInsert The string to insert.
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*/
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nsresult InsertTextAsAction(const nsAString& aStringToInsert);
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/**
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* InsertParagraphSeparatorAsAction() inserts a line break if it's TextEditor
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* or inserts new paragraph if it's HTMLEditor and it's possible.
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* Although, this method is implementation of
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* nsIPlaintextEditor.insertLineBreak(), this treats the input is an edit
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* action.
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*/
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nsresult InsertParagraphSeparatorAsAction();
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nsresult InsertTextAt(const nsAString& aStringToInsert,
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nsINode* aDestinationNode,
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int32_t aDestOffset,
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bool aDoDeleteSelection);
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virtual nsresult InsertFromDataTransfer(dom::DataTransfer* aDataTransfer,
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int32_t aIndex,
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nsIDocument* aSourceDoc,
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nsINode* aDestinationNode,
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int32_t aDestOffset,
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bool aDoDeleteSelection) override;
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virtual nsresult InsertFromDrop(dom::DragEvent* aDropEvent) override;
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/**
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* Extends the selection for given deletion operation
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* If done, also update aAction to what's actually left to do after the
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* extension.
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*/
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nsresult ExtendSelectionForDelete(Selection* aSelection,
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nsIEditor::EDirection* aAction);
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/**
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* Return true if the data is safe to insert as the source and destination
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* principals match, or we are in a editor context where this doesn't matter.
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* Otherwise, the data must be sanitized first.
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*/
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bool IsSafeToInsertData(nsIDocument* aSourceDoc);
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static void GetDefaultEditorPrefs(int32_t& aNewLineHandling,
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int32_t& aCaretStyle);
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/**
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* The maximum number of characters allowed.
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* default: -1 (unlimited).
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*/
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int32_t MaxTextLength() const { return mMaxTextLength; }
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void SetMaxTextLength(int32_t aLength) { mMaxTextLength = aLength; }
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/**
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* Replace existed string with a string.
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* This is fast path to replace all string when using single line control.
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*
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* @ param aString the string to be set
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*/
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nsresult SetText(const nsAString& aString);
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/**
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* OnCompositionStart() is called when editor receives eCompositionStart
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* event which should be handled in this editor.
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*/
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nsresult OnCompositionStart(WidgetCompositionEvent& aCompositionStartEvent);
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/**
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* OnCompositionChange() is called when editor receives an eCompositioChange
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* event which should be handled in this editor.
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*
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* @param aCompositionChangeEvent eCompositionChange event which should
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* be handled in this editor.
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*/
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nsresult
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OnCompositionChange(WidgetCompositionEvent& aCompositionChangeEvent);
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/**
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* OnCompositionEnd() is called when editor receives an eCompositionChange
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* event and it's followed by eCompositionEnd event and after
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* OnCompositionChange() is called.
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*/
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void OnCompositionEnd(WidgetCompositionEvent& aCompositionEndEvent);
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protected:
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virtual ~TextEditor();
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NS_IMETHOD InitRules();
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void BeginEditorInit();
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nsresult EndEditorInit();
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already_AddRefed<nsIDocumentEncoder> GetAndInitDocEncoder(
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const nsAString& aFormatType,
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uint32_t aFlags,
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const nsACString& aCharset);
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/**
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* InsertBrElementWithTransaction() creates a <br> element and inserts it
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* before aPointToInsert. Then, tries to collapse selection at or after the
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* new <br> node if aSelect is not eNone.
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*
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* @param aSelection The selection of this editor.
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* @param aPointToInsert The DOM point where should be <br> node inserted
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* before.
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* @param aSelect If eNone, this won't change selection.
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* If eNext, selection will be collapsed after
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* the <br> element.
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* If ePrevious, selection will be collapsed at
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* the <br> element.
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* @return The new <br> node. If failed to create new
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* <br> node, returns nullptr.
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*/
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template<typename PT, typename CT>
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already_AddRefed<Element>
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InsertBrElementWithTransaction(
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Selection& aSelection,
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const EditorDOMPointBase<PT, CT>& aPointToInsert,
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EDirection aSelect = eNone);
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/**
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* Factored methods for handling insertion of data from transferables
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* (drag&drop or clipboard).
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*/
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NS_IMETHOD PrepareTransferable(nsITransferable** transferable);
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nsresult InsertTextFromTransferable(nsITransferable* transferable);
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/**
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* DeleteSelectionAndCreateElement() creates a element whose name is aTag.
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* And insert it into the DOM tree after removing the selected content.
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*
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* @param aTag The element name to be created.
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* @return Created new element.
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*/
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already_AddRefed<Element> DeleteSelectionAndCreateElement(nsAtom& aTag);
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/**
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* This method first deletes the selection, if it's not collapsed. Then if
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* the selection lies in a CharacterData node, it splits it. If the
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* selection is at this point collapsed in a CharacterData node, it's
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* adjusted to be collapsed right before or after the node instead (which is
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* always possible, since the node was split).
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*/
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nsresult DeleteSelectionAndPrepareToCreateNode();
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/**
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* Shared outputstring; returns whether selection is collapsed and resulting
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* string.
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*/
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nsresult SharedOutputString(uint32_t aFlags, bool* aIsCollapsed,
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nsAString& aResult);
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enum PasswordFieldAllowed
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{
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ePasswordFieldAllowed,
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ePasswordFieldNotAllowed
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};
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bool CanCutOrCopy(PasswordFieldAllowed aPasswordFieldAllowed);
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bool FireClipboardEvent(EventMessage aEventMessage,
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int32_t aSelectionType,
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bool* aActionTaken = nullptr);
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bool UpdateMetaCharset(nsIDocument& aDocument,
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const nsACString& aCharacterSet);
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/**
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* EnsureComposition() should be called by composition event handlers. This
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* tries to get the composition for the event and set it to mComposition.
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* However, this may fail because the composition may be committed before
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* the event comes to the editor.
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*
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* @return true if there is a composition. Otherwise, for example,
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* a composition event handler in web contents moved focus
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* for committing the composition, returns false.
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*/
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bool EnsureComposition(WidgetCompositionEvent& aCompositionEvent);
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protected:
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nsCOMPtr<nsIDocumentEncoder> mCachedDocumentEncoder;
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nsString mCachedDocumentEncoderType;
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int32_t mWrapColumn;
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int32_t mMaxTextLength;
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int32_t mInitTriggerCounter;
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int32_t mNewlineHandling;
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int32_t mCaretStyle;
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friend class AutoEditInitRulesTrigger;
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friend class HTMLEditRules;
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friend class TextEditRules;
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};
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} // namespace mozilla
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mozilla::TextEditor*
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nsIEditor::AsTextEditor()
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{
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return static_cast<mozilla::TextEditor*>(this);
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}
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const mozilla::TextEditor*
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nsIEditor::AsTextEditor() const
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{
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return static_cast<const mozilla::TextEditor*>(this);
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}
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#endif // #ifndef mozilla_TextEditor_h
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