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      1 /*
      2  * Copyright 2006 The Android Open Source Project
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #ifndef SkXMLWriter_DEFINED
      9 #define SkXMLWriter_DEFINED
     10 
     11 #include "../private/SkTDArray.h"
     12 #include "SkString.h"
     13 #include "SkDOM.h"
     14 
     15 class SkWStream;
     16 class SkXMLParser;
     17 
     18 class SkXMLWriter {
     19 public:
     20             SkXMLWriter(bool doEscapeMarkup = true);
     21     virtual ~SkXMLWriter();
     22 
     23     void    addS32Attribute(const char name[], int32_t value);
     24     void    addAttribute(const char name[], const char value[]);
     25     void    addAttributeLen(const char name[], const char value[], size_t length);
     26     void    addHexAttribute(const char name[], uint32_t value, int minDigits = 0);
     27     void    addScalarAttribute(const char name[], SkScalar value);
     28     void    addText(const char text[], size_t length);
     29     void    endElement() { this->onEndElement(); }
     30     void    startElement(const char elem[]);
     31     void    startElementLen(const char elem[], size_t length);
     32     void    writeDOM(const SkDOM&, const SkDOM::Node*, bool skipRoot);
     33     void    flush();
     34     virtual void writeHeader();
     35 
     36 protected:
     37     virtual void onStartElementLen(const char elem[], size_t length) = 0;
     38     virtual void onAddAttributeLen(const char name[], const char value[], size_t length) = 0;
     39     virtual void onAddText(const char text[], size_t length) = 0;
     40     virtual void onEndElement() = 0;
     41 
     42     struct Elem {
     43         Elem(const char name[], size_t len)
     44             : fName(name, len)
     45             , fHasChildren(false)
     46             , fHasText(false) {}
     47 
     48         SkString    fName;
     49         bool        fHasChildren;
     50         bool        fHasText;
     51     };
     52     void doEnd(Elem* elem);
     53     bool doStart(const char name[], size_t length);
     54     Elem* getEnd();
     55     const char* getHeader();
     56     SkTDArray<Elem*> fElems;
     57 
     58 private:
     59     bool fDoEscapeMarkup;
     60     // illegal
     61     SkXMLWriter& operator=(const SkXMLWriter&);
     62 };
     63 
     64 class SkXMLStreamWriter : public SkXMLWriter {
     65 public:
     66     SkXMLStreamWriter(SkWStream*);
     67     ~SkXMLStreamWriter() override;
     68     void writeHeader() override;
     69 
     70 protected:
     71     void onStartElementLen(const char elem[], size_t length) override;
     72     void onEndElement() override;
     73     void onAddAttributeLen(const char name[], const char value[], size_t length) override;
     74     void onAddText(const char text[], size_t length) override;
     75 
     76 private:
     77     SkWStream&      fStream;
     78 };
     79 
     80 class SkXMLParserWriter : public SkXMLWriter {
     81 public:
     82     SkXMLParserWriter(SkXMLParser*);
     83     ~SkXMLParserWriter() override;
     84 protected:
     85     void onStartElementLen(const char elem[], size_t length) override;
     86     void onEndElement() override;
     87     void onAddAttributeLen(const char name[], const char value[], size_t length) override;
     88     void onAddText(const char text[], size_t length) override;
     89 private:
     90     SkXMLParser&        fParser;
     91 };
     92 
     93 
     94 #endif
     95