Line data    Source code

       1             : /******************************************************************************
       2             :  * $Id$
       3             :  *
       4             :  * Project:  SVG Translator
       5             :  * Purpose:  Definition of classes for OGR .svg driver.
       6             :  * Author:   Even Rouault, even dot rouault at spatialys.com
       7             :  *
       8             :  ******************************************************************************
       9             :  * Copyright (c) 2011-2013, Even Rouault <even dot rouault at spatialys.com>
      10             :  *
      11             :  * Permission is hereby granted, free of charge, to any person obtaining a
      12             :  * copy of this software and associated documentation files (the "Software"),
      13             :  * to deal in the Software without restriction, including without limitation
      14             :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      15             :  * and/or sell copies of the Software, and to permit persons to whom the
      16             :  * Software is furnished to do so, subject to the following conditions:
      17             :  *
      18             :  * The above copyright notice and this permission notice shall be included
      19             :  * in all copies or substantial portions of the Software.
      20             :  *
      21             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
      22             :  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      23             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
      24             :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      25             :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      26             :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      27             :  * DEALINGS IN THE SOFTWARE.
      28             :  ****************************************************************************/
      29             : 
      30             : #ifndef OGR_SVG_H_INCLUDED
      31             : #define OGR_SVG_H_INCLUDED
      32             : 
      33             : #include "ogrsf_frmts.h"
      34             : 
      35             : #ifdef HAVE_EXPAT
      36             : #include "ogr_expat.h"
      37             : #endif
      38             : 
      39             : class OGRSVGDataSource;
      40             : 
      41             : typedef enum
      42             : {
      43             :     SVG_POINTS,
      44             :     SVG_LINES,
      45             :     SVG_POLYGONS,
      46             : } SVGGeometryType;
      47             : 
      48             : constexpr int PARSER_BUF_SIZE = 8192;
      49             : 
      50             : /************************************************************************/
      51             : /*                             OGRSVGLayer                              */
      52             : /************************************************************************/
      53             : 
      54             : class OGRSVGLayer final : public OGRLayer
      55             : {
      56             :     OGRFeatureDefn *poFeatureDefn;
      57             :     OGRSpatialReference *poSRS;
      58             : #ifdef HAVE_EXPAT
      59             :     OGRSVGDataSource *poDS;
      60             : #endif
      61             :     CPLString osLayerName;
      62             : 
      63             :     SVGGeometryType svgGeomType;
      64             : 
      65             :     int nTotalFeatures;
      66             :     int nNextFID;
      67             :     VSILFILE *fpSVG;  // Large file API.
      68             : 
      69             : #ifdef HAVE_EXPAT
      70             :     XML_Parser oParser;
      71             :     XML_Parser oSchemaParser;
      72             : #endif
      73             :     char *pszSubElementValue;
      74             :     int nSubElementValueLen;
      75             :     int iCurrentField;
      76             : 
      77             :     OGRFeature *poFeature;
      78             :     OGRFeature **ppoFeatureTab;
      79             :     int nFeatureTabLength;
      80             :     int nFeatureTabIndex;
      81             : 
      82             :     int depthLevel;
      83             :     int interestingDepthLevel;
      84             :     bool inInterestingElement;
      85             : 
      86             :     bool bStopParsing;
      87             : #ifdef HAVE_EXPAT
      88             :     int nWithoutEventCounter;
      89             :     int nDataHandlerCounter;
      90             : 
      91             :     OGRSVGLayer *poCurLayer;
      92             : #endif
      93             : 
      94             :   private:
      95             :     void LoadSchema();
      96             : 
      97             :   public:
      98             :     OGRSVGLayer(const char *pszFilename, const char *layerName,
      99             :                 SVGGeometryType svgGeomType, OGRSVGDataSource *poDS);
     100             :     virtual ~OGRSVGLayer();
     101             : 
     102             :     virtual void ResetReading() override;
     103             :     virtual OGRFeature *GetNextFeature() override;
     104             : 
     105           6 :     virtual const char *GetName() override
     106             :     {
     107           6 :         return osLayerName.c_str();
     108             :     }
     109             : 
     110             :     virtual OGRwkbGeometryType GetGeomType() override;
     111             : 
     112             :     virtual GIntBig GetFeatureCount(int bForce = TRUE) override;
     113             : 
     114             :     virtual OGRFeatureDefn *GetLayerDefn() override;
     115             : 
     116             :     virtual int TestCapability(const char *) override;
     117             : 
     118             : #ifdef HAVE_EXPAT
     119             :     void startElementCbk(const char *pszName, const char **ppszAttr);
     120             :     void endElementCbk(const char *pszName);
     121             :     void dataHandlerCbk(const char *data, int nLen);
     122             : 
     123             :     void startElementLoadSchemaCbk(const char *pszName, const char **ppszAttr);
     124             :     void endElementLoadSchemaCbk(const char *pszName);
     125             :     void dataHandlerLoadSchemaCbk(const char *data, int nLen);
     126             : #endif
     127             : };
     128             : 
     129             : /************************************************************************/
     130             : /*                           OGRSVGDataSource                           */
     131             : /************************************************************************/
     132             : 
     133             : typedef enum
     134             : {
     135             :     SVG_VALIDITY_UNKNOWN,
     136             :     SVG_VALIDITY_INVALID,
     137             :     SVG_VALIDITY_VALID
     138             : } OGRSVGValidity;
     139             : 
     140             : class OGRSVGDataSource final : public OGRDataSource
     141             : {
     142             :     char *pszName;
     143             : 
     144             :     OGRSVGLayer **papoLayers;
     145             :     int nLayers;
     146             : 
     147             : #ifdef HAVE_EXPAT
     148             :     OGRSVGValidity eValidity;
     149             :     int bIsCloudmade;
     150             :     XML_Parser oCurrentParser;
     151             :     int nDataHandlerCounter;
     152             : #endif
     153             : 
     154             :   public:
     155             :     OGRSVGDataSource();
     156             :     virtual ~OGRSVGDataSource();
     157             : 
     158             :     int Open(const char *pszFilename);
     159             : 
     160           0 :     virtual const char *GetName() override
     161             :     {
     162           0 :         return pszName;
     163             :     }
     164             : 
     165          11 :     virtual int GetLayerCount() override
     166             :     {
     167          11 :         return nLayers;
     168             :     }
     169             : 
     170             :     virtual OGRLayer *GetLayer(int) override;
     171             : 
     172             :     virtual int TestCapability(const char *) override;
     173             : 
     174             : #ifdef HAVE_EXPAT
     175             :     void startElementValidateCbk(const char *pszName, const char **ppszAttr);
     176             :     void dataHandlerValidateCbk(const char *data, int nLen);
     177             : #endif
     178             : };
     179             : 
     180             : #endif /* ndef OGR_SVG_H_INCLUDED */