| /* |
| * (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef LayoutTextFragment_h |
| #define LayoutTextFragment_h |
| |
| #include "core/editing/EditingUtilities.h" |
| #include "core/layout/LayoutText.h" |
| #include "platform/heap/Handle.h" |
| |
| namespace blink { |
| |
| class FirstLetterPseudoElement; |
| |
| // Used to represent a text substring of an element, e.g., for text runs that |
| // are split because of first letter and that must therefore have different |
| // styles (and positions in the layout tree). |
| // We cache offsets so that text transformations can be applied in such a way |
| // that we can recover the original unaltered string from our corresponding DOM |
| // node. |
| class LayoutTextFragment final : public LayoutText { |
| public: |
| LayoutTextFragment(Node*, StringImpl*, int startOffset, int length); |
| LayoutTextFragment(Node*, StringImpl*); |
| ~LayoutTextFragment() override; |
| |
| static LayoutTextFragment* createAnonymous(PseudoElement&, StringImpl*); |
| static LayoutTextFragment* createAnonymous(PseudoElement&, |
| StringImpl*, |
| unsigned start, |
| unsigned length); |
| |
| bool isTextFragment() const override { return true; } |
| |
| bool canBeSelectionLeaf() const override { |
| return node() && hasEditableStyle(*node()); |
| } |
| |
| unsigned start() const { return m_start; } |
| unsigned fragmentLength() const { return m_fragmentLength; } |
| |
| unsigned textStartOffset() const override { return start(); } |
| |
| void setContentString(StringImpl*); |
| StringImpl* contentString() const { return m_contentString.get(); } |
| // The complete text is all of the text in the associated DOM text node. |
| PassRefPtr<StringImpl> completeText() const; |
| // The fragment text is the text which will be used by this |
| // LayoutTextFragment. For things like first-letter this may differ from the |
| // completeText as we maybe using only a portion of the text nodes content. |
| |
| PassRefPtr<StringImpl> originalText() const override; |
| |
| void setText(PassRefPtr<StringImpl>, bool force = false) override; |
| void setTextFragment(PassRefPtr<StringImpl>, unsigned start, unsigned length); |
| |
| void transformText() override; |
| |
| // FIXME: Rename to LayoutTextFragment |
| const char* name() const override { return "LayoutTextFragment"; } |
| |
| void setFirstLetterPseudoElement(FirstLetterPseudoElement* element) { |
| m_firstLetterPseudoElement = element; |
| } |
| FirstLetterPseudoElement* firstLetterPseudoElement() const { |
| return m_firstLetterPseudoElement; |
| } |
| |
| void setIsRemainingTextLayoutObject(bool isRemainingText) { |
| m_isRemainingTextLayoutObject = isRemainingText; |
| } |
| bool isRemainingTextLayoutObject() const { |
| return m_isRemainingTextLayoutObject; |
| } |
| |
| protected: |
| void willBeDestroyed() override; |
| |
| private: |
| LayoutBlock* blockForAccompanyingFirstLetter() const; |
| UChar previousCharacter() const override; |
| |
| Text* associatedTextNode() const; |
| void updateHitTestResult(HitTestResult&, const LayoutPoint&) override; |
| |
| unsigned m_start; |
| unsigned m_fragmentLength; |
| bool m_isRemainingTextLayoutObject; |
| RefPtr<StringImpl> m_contentString; |
| // Reference back to FirstLetterPseudoElement; cleared by |
| // FirstLetterPseudoElement::detachLayoutTree() if it goes away first. |
| UntracedMember<FirstLetterPseudoElement> m_firstLetterPseudoElement; |
| }; |
| |
| DEFINE_TYPE_CASTS(LayoutTextFragment, |
| LayoutObject, |
| object, |
| toLayoutText(object)->isTextFragment(), |
| toLayoutText(object).isTextFragment()); |
| |
| } // namespace blink |
| |
| #endif // LayoutTextFragment_h |