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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  * Copyright (C) 2004, 2008, 2009, 2011 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  *
     21  */
     22 
     23 #ifndef HTMLAreaElement_h
     24 #define HTMLAreaElement_h
     25 
     26 #include "core/html/HTMLAnchorElement.h"
     27 #include "core/platform/graphics/LayoutRect.h"
     28 
     29 namespace WebCore {
     30 
     31 class HitTestResult;
     32 class HTMLImageElement;
     33 class Path;
     34 
     35 class HTMLAreaElement FINAL : public HTMLAnchorElement {
     36 public:
     37     static PassRefPtr<HTMLAreaElement> create(const QualifiedName&, Document*);
     38 
     39     bool isDefault() const { return m_shape == Default; }
     40 
     41     bool mapMouseEvent(LayoutPoint location, const LayoutSize&, HitTestResult&);
     42 
     43     LayoutRect computeRect(RenderObject*) const;
     44     Path computePath(RenderObject*) const;
     45 
     46     // The parent map's image.
     47     HTMLImageElement* imageElement() const;
     48 
     49 private:
     50     HTMLAreaElement(const QualifiedName&, Document*);
     51 
     52     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     53     virtual bool supportsFocus() const;
     54     virtual String target() const;
     55     virtual bool isKeyboardFocusable() const OVERRIDE;
     56     virtual bool isMouseFocusable() const;
     57     virtual bool rendererIsFocusable() const OVERRIDE;
     58     virtual void updateFocusAppearance(bool /*restorePreviousSelection*/);
     59     virtual void setFocus(bool) OVERRIDE;
     60 
     61     enum Shape { Default, Poly, Rect, Circle, Unknown };
     62     Path getRegion(const LayoutSize&) const;
     63     void invalidateCachedRegion();
     64 
     65     OwnPtr<Path> m_region;
     66     Vector<Length> m_coords;
     67     LayoutSize m_lastSize;
     68     Shape m_shape;
     69 };
     70 
     71 inline bool isHTMLAreaElement(const Node* node)
     72 {
     73     return node->hasTagName(HTMLNames::areaTag);
     74 }
     75 
     76 inline bool isHTMLAreaElement(const Element* element)
     77 {
     78     return element->hasTagName(HTMLNames::areaTag);
     79 }
     80 
     81 inline HTMLAreaElement* toHTMLAreaElement(Node* node)
     82 {
     83     ASSERT_WITH_SECURITY_IMPLICATION(!node || isHTMLAreaElement(node));
     84     return static_cast<HTMLAreaElement*>(node);
     85 }
     86 
     87 } //namespace
     88 
     89 #endif
     90