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105 lines
4.1 KiB
C++
105 lines
4.1 KiB
C++
/*
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* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_CORE_EDITING_CARET_H_
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#define SKY_ENGINE_CORE_EDITING_CARET_H_
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#include "sky/engine/core/editing/VisiblePosition.h"
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#include "sky/engine/platform/geometry/IntRect.h"
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#include "sky/engine/platform/geometry/LayoutRect.h"
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#include "sky/engine/wtf/Noncopyable.h"
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namespace blink {
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class LocalFrame;
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class GraphicsContext;
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class PositionWithAffinity;
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class RenderBlock;
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class RenderView;
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class CaretBase {
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WTF_MAKE_NONCOPYABLE(CaretBase);
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WTF_MAKE_FAST_ALLOCATED;
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protected:
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enum CaretVisibility { Visible, Hidden };
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explicit CaretBase(CaretVisibility = Hidden);
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void clearCaretRect();
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// Creating VisiblePosition causes synchronous layout so we should use the
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// PositionWithAffinity version if possible.
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// A position in HTMLTextFromControlElement is a typical example.
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bool updateCaretRect(Document*, const PositionWithAffinity& caretPosition);
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bool updateCaretRect(Document*, const VisiblePosition& caretPosition);
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IntRect absoluteBoundsForLocalRect(Node*, const LayoutRect&) const;
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void paintCaret(Node*, GraphicsContext*, const LayoutPoint&, const LayoutRect& clipRect) const;
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const LayoutRect& localCaretRectWithoutUpdate() const { return m_caretLocalRect; }
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bool shouldUpdateCaretRect() const { return m_caretRectNeedsUpdate; }
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void setCaretRectNeedsUpdate() { m_caretRectNeedsUpdate = true; }
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void setCaretVisibility(CaretVisibility visibility) { m_caretVisibility = visibility; }
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bool caretIsVisible() const { return m_caretVisibility == Visible; }
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CaretVisibility caretVisibility() const { return m_caretVisibility; }
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protected:
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static RenderBlock* caretRenderer(Node*);
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private:
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LayoutRect m_caretLocalRect; // caret rect in coords local to the renderer responsible for painting the caret
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bool m_caretRectNeedsUpdate; // true if m_caretRect (and m_absCaretBounds in FrameSelection) need to be calculated
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CaretVisibility m_caretVisibility;
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};
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class DragCaretController final : private CaretBase {
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WTF_MAKE_NONCOPYABLE(DragCaretController);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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static PassOwnPtr<DragCaretController> create();
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RenderBlock* caretRenderer() const;
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void paintDragCaret(LocalFrame*, GraphicsContext*, const LayoutPoint&, const LayoutRect& clipRect) const;
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bool isContentEditable() const { return m_position.rootEditableElement(); }
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bool isContentRichlyEditable() const;
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bool hasCaret() const { return m_position.isNotNull(); }
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const VisiblePosition& caretPosition() { return m_position; }
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void setCaretPosition(const VisiblePosition&);
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void clear() { setCaretPosition(VisiblePosition()); }
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void nodeWillBeRemoved(Node&);
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private:
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DragCaretController();
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VisiblePosition m_position;
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_EDITING_CARET_H_
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