зеркало из https://github.com/mozilla/gecko-dev.git
109 строки
3.7 KiB
C++
109 строки
3.7 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 CompositionTransaction_h
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#define CompositionTransaction_h
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#include "mozilla/EditTransactionBase.h" // base class
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#include "nsCycleCollectionParticipant.h" // various macros
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#include "nsString.h" // mStringToInsert
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#define NS_IMETEXTTXN_IID \
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{ \
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0xb391355d, 0x346c, 0x43d1, { \
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0x85, 0xed, 0x9e, 0x65, 0xbe, 0xe7, 0x7e, 0x48 \
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} \
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}
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namespace mozilla {
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class EditorBase;
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class TextComposition;
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class TextRangeArray;
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namespace dom {
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class Text;
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} // namespace dom
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/**
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* CompositionTransaction stores all edit for a composition, i.e.,
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* from compositionstart event to compositionend event. E.g., inserting a
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* composition string, modifying the composition string or its IME selection
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* ranges and commit or cancel the composition.
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*/
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class CompositionTransaction final : public EditTransactionBase {
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protected:
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CompositionTransaction(EditorBase& aEditorBase,
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const nsAString& aStringToInsert, dom::Text& aTextNode,
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uint32_t aOffset);
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IMETEXTTXN_IID)
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/**
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* Creates a composition transaction. aEditorBase must not return from
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* GetComposition() while calling this method. Note that this method will
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* update text node information of aEditorBase.mComposition.
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*
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* @param aEditorBase The editor which has composition.
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* @param aStringToInsert The new composition string to insert. This may
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* be different from actual composition string.
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* E.g., password editor can hide the character
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* with a different character.
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* @param aTextNode The text node which will have aStringToInsert.
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* @param aOffset The offset in aTextNode where aStringToInsert
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* will be inserted.
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*/
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static already_AddRefed<CompositionTransaction> Create(
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EditorBase& aEditorBase, const nsAString& aStringToInsert,
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dom::Text& aTextNode, uint32_t aOffset);
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(CompositionTransaction,
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EditTransactionBase)
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_EDITTRANSACTIONBASE
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NS_IMETHOD Merge(nsITransaction* aTransaction, bool* aDidMerge) override;
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void MarkFixed();
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static nsresult SetIMESelection(EditorBase& aEditorBase, dom::Text* aTextNode,
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uint32_t aOffsetInNode,
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uint32_t aLengthOfCompositionString,
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const TextRangeArray* aRanges);
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private:
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~CompositionTransaction();
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nsresult SetSelectionForRanges();
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// The text element to operate upon.
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RefPtr<dom::Text> mTextNode;
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// The offsets into mTextNode where the insertion should be placed.
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uint32_t mOffset;
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uint32_t mReplaceLength;
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// The range list.
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RefPtr<TextRangeArray> mRanges;
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// The text to insert into mTextNode at mOffset.
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nsString mStringToInsert;
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// The editor, which is used to get the selection controller.
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RefPtr<EditorBase> mEditorBase;
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bool mFixed;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(CompositionTransaction, NS_IMETEXTTXN_IID)
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} // namespace mozilla
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#endif // #ifndef CompositionTransaction_h
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