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      1 /*
      2  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis (at) kde.org>
      4  * Copyright (C) 2014 Samsung Electronics. 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 #ifndef SVGZoomAndPan_h
     23 #define SVGZoomAndPan_h
     24 
     25 #include "core/SVGNames.h"
     26 #include "core/dom/QualifiedName.h"
     27 #include "wtf/HashSet.h"
     28 
     29 namespace WebCore {
     30 
     31 class ExceptionState;
     32 
     33 enum SVGZoomAndPanType {
     34     SVGZoomAndPanUnknown = 0,
     35     SVGZoomAndPanDisable,
     36     SVGZoomAndPanMagnify
     37 };
     38 
     39 class SVGZoomAndPan {
     40 public:
     41     // Forward declare enumerations in the W3C naming scheme, for IDL generation.
     42     enum {
     43         SVG_ZOOMANDPAN_UNKNOWN = SVGZoomAndPanUnknown,
     44         SVG_ZOOMANDPAN_DISABLE = SVGZoomAndPanDisable,
     45         SVG_ZOOMANDPAN_MAGNIFY = SVGZoomAndPanMagnify
     46     };
     47 
     48     virtual ~SVGZoomAndPan() { }
     49 
     50     static bool isKnownAttribute(const QualifiedName&);
     51     static void addSupportedAttributes(HashSet<QualifiedName>&);
     52 
     53     static SVGZoomAndPanType parseFromNumber(unsigned short number)
     54     {
     55         if (!number || number > SVGZoomAndPanMagnify)
     56             return SVGZoomAndPanUnknown;
     57         return static_cast<SVGZoomAndPanType>(number);
     58     }
     59 
     60     bool parseZoomAndPan(const LChar*& start, const LChar* end);
     61     bool parseZoomAndPan(const UChar*& start, const UChar* end);
     62 
     63     bool parseAttribute(const QualifiedName& name, const AtomicString& value)
     64     {
     65         if (name == SVGNames::zoomAndPanAttr) {
     66             m_zoomAndPan = SVGZoomAndPanUnknown;
     67             if (!value.isEmpty()) {
     68                 if (value.is8Bit()) {
     69                     const LChar* start = value.characters8();
     70                     parseZoomAndPan(start, start + value.length());
     71                 } else {
     72                     const UChar* start = value.characters16();
     73                     parseZoomAndPan(start, start + value.length());
     74                 }
     75             }
     76             return true;
     77         }
     78 
     79         return false;
     80     }
     81 
     82     // JS API
     83     SVGZoomAndPanType zoomAndPan() const { return m_zoomAndPan; }
     84     virtual void setZoomAndPan(unsigned short value) { m_zoomAndPan = parseFromNumber(value); }
     85     virtual void setZoomAndPan(unsigned short value, ExceptionState&) { setZoomAndPan(value); }
     86 
     87 protected:
     88     SVGZoomAndPan();
     89     void resetZoomAndPan();
     90 
     91 private:
     92     SVGZoomAndPanType m_zoomAndPan;
     93 };
     94 
     95 } // namespace WebCore
     96 
     97 #endif // SVGZoomAndPan_h
     98