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mapogcsld.c
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/**********************************************************************
* $Id$
*
* Project: MapServer
* Purpose: OGC SLD implementation
* Author: Y. Assefa, DM Solutions Group (assefa@dmsolutions.ca)
*
**********************************************************************
* Copyright (c) 2003, Y. Assefa, DM Solutions Group Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
****************************************************************************/
#include "mapogcsld.h"
#include "mapogcfilter.h"
#include "mapserver.h"
#include "mapows.h"
#ifdef USE_OGR
#include "cpl_string.h"
#endif
#define SLD_LINE_SYMBOL_NAME "sld_line_symbol"
#define SLD_LINE_SYMBOL_DASH_NAME "sld_line_symbol_dash"
#define SLD_MARK_SYMBOL_SQUARE "sld_mark_symbol_square"
#define SLD_MARK_SYMBOL_SQUARE_FILLED "sld_mark_symbol_square_filled"
#define SLD_MARK_SYMBOL_CIRCLE "sld_mark_symbol_circle"
#define SLD_MARK_SYMBOL_CIRCLE_FILLED "sld_mark_symbol_circle_filled"
#define SLD_MARK_SYMBOL_TRIANGLE "sld_mark_symbol_triangle"
#define SLD_MARK_SYMBOL_TRIANGLE_FILLED "sld_mark_symbol_triangle_filled"
#define SLD_MARK_SYMBOL_STAR "sld_mark_symbol_star"
#define SLD_MARK_SYMBOL_STAR_FILLED "sld_mark_symbol_star_filled"
#define SLD_MARK_SYMBOL_CROSS "sld_mark_symbol_cross"
#define SLD_MARK_SYMBOL_CROSS_FILLED "sld_mark_symbol_cross_filled"
#define SLD_MARK_SYMBOL_X "sld_mark_symbol_x"
#define SLD_MARK_SYMBOL_X_FILLED "sld_mark_symbol_x_filled"
/************************************************************************/
/* msSLDApplySLDURL */
/* */
/* Use the SLD document given through a URL and apply the SLD */
/* on the map. Layer name and Named Layer's name parameter are */
/* used to do the match. */
/************************************************************************/
int msSLDApplySLDURL(mapObj *map, char *szURL, int iLayer,
char *pszStyleLayerName, char **ppszLayerNames)
{
#ifdef USE_OGR
/* needed for libcurl function msHTTPGetFile in maphttp.c */
#if defined(USE_CURL)
char *pszSLDTmpFile = NULL;
int status = 0;
char *pszSLDbuf=NULL;
FILE *fp = NULL;
int nStatus = MS_FAILURE;
if (map && szURL) {
pszSLDTmpFile = msTmpFile(map, map->mappath, NULL, "sld.xml");
if (pszSLDTmpFile == NULL) {
pszSLDTmpFile = msTmpFile(map, NULL, NULL, "sld.xml" );
}
if (pszSLDTmpFile == NULL) {
msSetError(MS_WMSERR, "Could not determine temporary file %s. Please make sure that the temporary path is set. The temporary path can be defined for example by setting TMPPATH in the map file. Please check the MapServer documentation on temporary path settings.", "msSLDApplySLDURL()", pszSLDTmpFile);
} else {
int nMaxRemoteSLDBytes;
const char *pszMaxRemoteSLDBytes = msOWSLookupMetadata(&(map->web.metadata), "MO", "remote_sld_max_bytes");
if(!pszMaxRemoteSLDBytes) {
nMaxRemoteSLDBytes = 1024*1024; /* 1 megaByte */
} else {
nMaxRemoteSLDBytes = atoi(pszMaxRemoteSLDBytes);
}
if (msHTTPGetFile(szURL, pszSLDTmpFile, &status,-1, 0, 0, nMaxRemoteSLDBytes) == MS_SUCCESS) {
if ((fp = fopen(pszSLDTmpFile, "rb")) != NULL) {
int nBufsize=0;
fseek(fp, 0, SEEK_END);
nBufsize = ftell(fp);
if(nBufsize > 0) {
rewind(fp);
pszSLDbuf = (char*)malloc((nBufsize+1)*sizeof(char));
fread(pszSLDbuf, 1, nBufsize, fp);
pszSLDbuf[nBufsize] = '\0';
} else {
msSetError(MS_WMSERR, "Could not open SLD %s as it appears empty", "msSLDApplySLDURL", szURL);
}
fclose(fp);
unlink(pszSLDTmpFile);
}
} else {
unlink(pszSLDTmpFile);
msSetError(MS_WMSERR, "Could not open SLD %s and save it in a temporary file. Please make sure that the sld url is valid and that the temporary path is set. The temporary path can be defined for example by setting TMPPATH in the map file. Please check the MapServer documentation on temporary path settings.", "msSLDApplySLDURL", szURL);
}
if (pszSLDbuf)
nStatus = msSLDApplySLD(map, pszSLDbuf, iLayer, pszStyleLayerName, ppszLayerNames);
}
}
return nStatus;
#else
msSetError(MS_MISCERR, "WMS/WFS client support is not enabled .", "msSLDApplySLDURL()");
return(MS_FAILURE);
#endif
#else
/* ------------------------------------------------------------------
* OGR Support not included...
* ------------------------------------------------------------------ */
msSetError(MS_MISCERR, "OGR support is not available.", "msSLDApplySLDURL()");
return(MS_FAILURE);
#endif /* USE_OGR */
}
/************************************************************************/
/* msSLDApplySLD */
/* */
/* Parses the SLD into array of layers. Go through the map and */
/* compare the SLD layers and the map layers using the name. If */
/* they have the same name, copy the classes asscoaited with */
/* the SLD layers onto the map layers. */
/************************************************************************/
int msSLDApplySLD(mapObj *map, char *psSLDXML, int iLayer, char *pszStyleLayerName, char **ppszLayerNames)
{
#if defined(USE_WMS_SVR) || defined (USE_WFS_SVR) || defined (USE_WCS_SVR) || defined(USE_SOS_SVR)
#ifdef USE_OGR
int nLayers = 0;
layerObj *pasLayers = NULL;
int i, j, k, z, iClass;
int bUseSpecificLayer = 0;
const char *pszTmp = NULL;
int bFreeTemplate = 0;
int nLayerStatus = 0;
int nStatus = MS_SUCCESS;
/*const char *pszSLDNotSupported = NULL;*/
char *tmpfilename = NULL;
const char *pszFullName = NULL;
char szTmp[512];
char *pszTmp1=NULL;
char *pszTmp2 = NULL;
char *pszBuffer = NULL;
layerObj *lp = NULL;
pasLayers = msSLDParseSLD(map, psSLDXML, &nLayers);
if( pasLayers == NULL ) {
errorObj* psError = msGetErrorObj();
if( psError && psError->code != MS_NOERR )
return MS_FAILURE;
}
/* -------------------------------------------------------------------- */
/* If the same layer is given more that once, we need to */
/* duplicate it. */
/* -------------------------------------------------------------------- */
if (pasLayers && nLayers>0) {
int l,m;
for (m=0; m<nLayers; m++) {
layerObj *psTmpLayer=NULL;
int nIndex;
char tmpId[128];
nIndex = msGetLayerIndex(map, pasLayers[m].name);
if(pasLayers[m].name == NULL) continue;
for (l=0; l<nLayers; l++) {
if(pasLayers[l].name == NULL)
continue;
if (m !=l && strcasecmp(pasLayers[m].name, pasLayers[l].name)== 0 &&
nIndex != -1) {
psTmpLayer = (layerObj *) malloc(sizeof(layerObj));
initLayer(psTmpLayer, map);
msCopyLayer(psTmpLayer, GET_LAYER(map,nIndex));
/* open the source layer */
if ( !psTmpLayer->vtable)
msInitializeVirtualTable(psTmpLayer);
/*make the name unique*/
snprintf(tmpId, sizeof(tmpId), "%lx_%x_%d",(long)time(NULL),(int)getpid(),
map->numlayers);
if (psTmpLayer->name)
msFree(psTmpLayer->name);
psTmpLayer->name = strdup(tmpId);
msFree(pasLayers[l].name);
pasLayers[l].name = strdup(tmpId);
msInsertLayer(map, psTmpLayer, -1);
MS_REFCNT_DECR(psTmpLayer);
}
}
}
for (i=0; i<map->numlayers; i++) {
if (iLayer >=0 && iLayer< map->numlayers) {
i = iLayer;
bUseSpecificLayer = 1;
}
/* compare layer name to wms_name as well */
pszTmp = msOWSLookupMetadata(&(GET_LAYER(map, i)->metadata), "MO", "name");
for (j=0; j<nLayers; j++) {
/* -------------------------------------------------------------------- */
/* copy : - class */
/* - layer's labelitem */
/* -------------------------------------------------------------------- */
if ((pasLayers[j].name && pszStyleLayerName == NULL &&
((strcasecmp(GET_LAYER(map, i)->name, pasLayers[j].name) == 0 ||
(pszTmp && strcasecmp(pszTmp, pasLayers[j].name) == 0))||
(GET_LAYER(map, i)->group &&
strcasecmp(GET_LAYER(map, i)->group, pasLayers[j].name) == 0))) ||
(bUseSpecificLayer && pszStyleLayerName && pasLayers[j].name &&
strcasecmp(pasLayers[j].name, pszStyleLayerName) == 0)) {
#ifdef notdef
/*this is a test code if we decide to flag some layers as not supporting SLD*/
pszSLDNotSupported = msOWSLookupMetadata(&(GET_LAYER(map, i)->metadata), "M", "SLD_NOT_SUPPORTED");
if (pszSLDNotSupported) {
msSetError(MS_WMSERR, "Layer %s does not support SLD", "msSLDApplySLD", pasLayers[j].name);
nsStatus = MS_FAILURE;
goto sld_cleanup;
}
#endif
if ( pasLayers[j].numclasses > 0) {
GET_LAYER(map, i)->type = pasLayers[j].type;
for(k=0; k<GET_LAYER(map, i)->numclasses; k++) {
if (GET_LAYER(map, i)->class[k] != NULL) {
GET_LAYER(map, i)->class[k]->layer=NULL;
if (freeClass(GET_LAYER(map, i)->class[k]) == MS_SUCCESS ) {
msFree(GET_LAYER(map, i)->class[k]);
GET_LAYER(map, i)->class[k] = NULL;
}
}
}
GET_LAYER(map, i)->numclasses = 0;
/*unset the classgroup on the layer if it was set. This allows the layer to render
with all the classes defined in the SLD*/
msFree(GET_LAYER(map, i)->classgroup);
GET_LAYER(map, i)->classgroup = NULL;
iClass = 0;
for (k=0; k < pasLayers[j].numclasses; k++) {
if (msGrowLayerClasses(GET_LAYER(map, i)) == NULL)
return MS_FAILURE;
initClass(GET_LAYER(map, i)->class[iClass]);
msCopyClass(GET_LAYER(map, i)->class[iClass],
pasLayers[j].class[k], NULL);
GET_LAYER(map, i)->class[iClass]->layer = GET_LAYER(map, i);
GET_LAYER(map, i)->numclasses++;
/*aliases may have been used as part of the sld text symbolizer for
label element. Try to process it if that is the case #3114*/
if (msLayerOpen(GET_LAYER(map, i)) == MS_SUCCESS &&
msLayerGetItems(GET_LAYER(map, i)) == MS_SUCCESS) {
if (GET_LAYER(map, i)->class[iClass]->text.string) {
for(z=0; z<GET_LAYER(map, i)->numitems; z++) {
if (!GET_LAYER(map, i)->items[z] || strlen(GET_LAYER(map, i)->items[z]) <= 0)
continue;
snprintf(szTmp, sizeof(szTmp), "%s_alias", GET_LAYER(map, i)->items[z]);
pszFullName = msOWSLookupMetadata(&(GET_LAYER(map, i)->metadata), "G", szTmp);
pszTmp1 = msStrdup( GET_LAYER(map, i)->class[iClass]->text.string);
if (pszFullName != NULL && (strstr(pszTmp1, pszFullName) != NULL)) {
char *tmpstr1= NULL;
tmpstr1 = msReplaceSubstring(pszTmp1, pszFullName, GET_LAYER(map, i)->items[z]);
pszTmp2 = (char *)malloc(sizeof(char)*(strlen(tmpstr1)+3));
sprintf(pszTmp2,"(%s)",tmpstr1);
msLoadExpressionString(&(GET_LAYER(map, i)->class[iClass]->text), pszTmp2);
msFree(pszTmp2);
}
msFree(pszTmp1);
}
}
}
iClass++;
}
} else {
/*this is probably an SLD that uses Named styles*/
if (pasLayers[j].classgroup) {
for (k=0; k<GET_LAYER(map, i)->numclasses; k++) {
if (GET_LAYER(map, i)->class[k]->group &&
strcasecmp(GET_LAYER(map, i)->class[k]->group,
pasLayers[j].classgroup) == 0)
break;
}
if (k < GET_LAYER(map, i)->numclasses) {
msFree( GET_LAYER(map, i)->classgroup);
GET_LAYER(map, i)->classgroup = msStrdup(pasLayers[j].classgroup);
} else {
/* TODO we throw an exception ?*/
}
}
}
if (pasLayers[j].labelitem) {
if (GET_LAYER(map, i)->labelitem)
free(GET_LAYER(map, i)->labelitem);
GET_LAYER(map, i)->labelitem = msStrdup(pasLayers[j].labelitem);
}
if (pasLayers[j].classitem) {
if (GET_LAYER(map, i)->classitem)
free(GET_LAYER(map, i)->classitem);
GET_LAYER(map, i)->classitem = msStrdup(pasLayers[j].classitem);
}
/* opacity for sld raster */
if (GET_LAYER(map, i)->type == MS_LAYER_RASTER &&
pasLayers[i].compositer && pasLayers[j].compositer->opacity != 100)
msSetLayerOpacity(GET_LAYER(map, i), pasLayers[j].compositer->opacity);
/* mark as auto-generate SLD */
if (GET_LAYER(map, i)->connectiontype == MS_WMS)
msInsertHashTable(&(GET_LAYER(map, i)->metadata),
"wms_sld_body", "auto" );
/* ==================================================================== */
/* if the SLD contained a spatial feature, the layerinfo */
/* parameter contains the node. Extract it and do a query on */
/* the layer. Insert also a metadata that will be used when */
/* rendering the final image. */
/* ==================================================================== */
if (pasLayers[j].layerinfo &&
(GET_LAYER(map, i)->type == MS_LAYER_POINT ||
GET_LAYER(map, i)->type == MS_LAYER_LINE ||
GET_LAYER(map, i)->type == MS_LAYER_POLYGON ||
GET_LAYER(map, i)->type == MS_LAYER_TILEINDEX)) {
FilterEncodingNode *psNode = NULL;
msInsertHashTable(&(GET_LAYER(map, i)->metadata),
"tmp_wms_sld_query", "true" );
psNode = (FilterEncodingNode *)pasLayers[j].layerinfo;
/* -------------------------------------------------------------------- */
/* set the template on the classes so that the query works */
/* using classes. If there are no classes, set it at the layer level.*/
/* -------------------------------------------------------------------- */
if (GET_LAYER(map, i)->numclasses > 0) {
for (k=0; k<GET_LAYER(map, i)->numclasses; k++) {
if (!GET_LAYER(map, i)->class[k]->template)
GET_LAYER(map, i)->class[k]->template = msStrdup("ttt.html");
}
} else if (!GET_LAYER(map, i)->template) {
bFreeTemplate = 1;
GET_LAYER(map, i)->template = msStrdup("ttt.html");
}
nLayerStatus = GET_LAYER(map, i)->status;
GET_LAYER(map, i)->status = MS_ON;
nStatus =
FLTApplyFilterToLayer(psNode, map,
GET_LAYER(map, i)->index);
/* -------------------------------------------------------------------- */
/* nothing found is a valid, do not exit. */
/* -------------------------------------------------------------------- */
if (nStatus != MS_SUCCESS) {
errorObj *ms_error;
ms_error = msGetErrorObj();
if(ms_error->code == MS_NOTFOUND)
nStatus = MS_SUCCESS;
}
GET_LAYER(map, i)->status = nLayerStatus;
FLTFreeFilterEncodingNode(psNode);
if ( bFreeTemplate) {
free(GET_LAYER(map, i)->template);
GET_LAYER(map, i)->template = NULL;
}
pasLayers[j].layerinfo=NULL;
if( nStatus != MS_SUCCESS ) {
goto sld_cleanup;
}
} else {
lp = GET_LAYER(map, i);
/* The SLD might have a FeatureTypeConstraint */
if( pasLayers[j].filter.type == MS_EXPRESSION )
{
if( lp->filter.string && lp->filter.type == MS_EXPRESSION )
{
pszBuffer = msStringConcatenate(NULL, "((");
pszBuffer = msStringConcatenate(pszBuffer, lp->filter.string);
pszBuffer = msStringConcatenate(pszBuffer, ") AND (");
pszBuffer = msStringConcatenate(pszBuffer, pasLayers[j].filter.string);
pszBuffer = msStringConcatenate(pszBuffer, "))");
msFreeExpression(&lp->filter);
msInitExpression(&lp->filter);
lp->filter.string = pszBuffer;
lp->filter.type = MS_EXPRESSION;
pszBuffer = NULL;
}
else
{
msFreeExpression(&lp->filter);
msInitExpression(&lp->filter);
lp->filter.string = msStrdup(pasLayers[j].filter.string);
lp->filter.type = MS_EXPRESSION;
}
}
/*in some cases it would make sense to concatenate all the class
expressions and use it to set the filter on the layer. This
could increase performace. Will do it for db types layers #2840*/
if (lp->filter.string == NULL || (lp->filter.string && lp->filter.type == MS_STRING && !lp->filteritem)) {
if (lp->connectiontype == MS_POSTGIS || lp->connectiontype == MS_ORACLESPATIAL || lp->connectiontype == MS_PLUGIN) {
if (lp->numclasses > 0) {
/* check first that all classes have an expression type. That is
the only way we can concatenate them and set the filter
expression */
for (k=0; k<lp->numclasses; k++) {
if (lp->class[k]->expression.type != MS_EXPRESSION)
break;
}
if (k == lp->numclasses) {
for (k=0; k<lp->numclasses; k++) {
if (pszBuffer == NULL)
snprintf(szTmp, sizeof(szTmp), "%s", "(("); /* we a building a string expression, explicitly set type below */
else
snprintf(szTmp, sizeof(szTmp), "%s", " OR ");
pszBuffer = msStringConcatenate(pszBuffer, szTmp);
pszBuffer = msStringConcatenate(pszBuffer, lp->class[k]->expression.string);
}
snprintf(szTmp, sizeof(szTmp), "%s", "))");
pszBuffer =msStringConcatenate(pszBuffer, szTmp);
msFreeExpression(&lp->filter);
msInitExpression(&lp->filter);
lp->filter.string = msStrdup(pszBuffer);
lp->filter.type = MS_EXPRESSION;
msFree(pszBuffer);
pszBuffer = NULL;
}
}
}
}
}
break;
}
}
if (bUseSpecificLayer)
break;
}
/* -------------------------------------------------------------------- */
/* if needed return a comma separated list of the layers found */
/* in the sld. */
/* -------------------------------------------------------------------- */
if (ppszLayerNames) {
char *pszTmp = NULL;
for (i=0; i<nLayers; i++) {
if (pasLayers[i].name) {
if (pszTmp !=NULL)
pszTmp = msStringConcatenate(pszTmp, ",");
pszTmp = msStringConcatenate(pszTmp, pasLayers[i].name);
}
}
*ppszLayerNames = pszTmp;
}
}
nStatus = MS_SUCCESS;
sld_cleanup:
for (i=0; i<nLayers; i++)
freeLayer(&pasLayers[i]);
msFree(pasLayers);
if(map->debug == MS_DEBUGLEVEL_VVV) {
tmpfilename = msTmpFile(map, map->mappath, NULL, "_sld.map");
if (tmpfilename == NULL) {
tmpfilename = msTmpFile(map, NULL, NULL, "_sld.map" );
}
if (tmpfilename) {
msSaveMap(map,tmpfilename);
msDebug("msApplySLD(): Map file after SLD was applied %s", tmpfilename);
msFree(tmpfilename);
}
}
return nStatus;
#else
/* ------------------------------------------------------------------
* OGR Support not included...
* ------------------------------------------------------------------ */
msSetError(MS_MISCERR, "OGR support is not available.", "msSLDApplySLD()");
return(MS_FAILURE);
#endif /* USE_OGR */
#else
msSetError(MS_MISCERR, "OWS support is not available.",
"msSLDApplySLD()");
return(MS_FAILURE);
#endif
}
#ifdef USE_OGR
/************************************************************************/
/* msSLDParseSLD */
/* */
/* Parse the sld document into layers : for each named layer */
/* there is one mapserver layer created with approproate */
/* classes and styles. */
/* Returns an array of mapserver layers. The pnLayres if */
/* provided will indicate the size of the returned array. */
/************************************************************************/
layerObj *msSLDParseSLD(mapObj *map, char *psSLDXML, int *pnLayers)
{
CPLXMLNode *psRoot = NULL;
CPLXMLNode *psSLD, *psNamedLayer, *psChild, *psName;
layerObj *pasLayers = NULL;
int iLayer = 0;
int nLayers = 0;
if (map == NULL || psSLDXML == NULL || strlen(psSLDXML) <= 0 ||
(strstr(psSLDXML, "StyledLayerDescriptor") == NULL)) {
msSetError(MS_WMSERR, "Invalid SLD document", "");
return NULL;
}
psRoot = CPLParseXMLString(psSLDXML);
if( psRoot == NULL) {
msSetError(MS_WMSERR, "Invalid SLD document : %s", "", psSLDXML);
return NULL;
}
/* strip namespaces ogc and sld and gml */
CPLStripXMLNamespace(psRoot, "ogc", 1);
CPLStripXMLNamespace(psRoot, "sld", 1);
CPLStripXMLNamespace(psRoot, "gml", 1);
CPLStripXMLNamespace(psRoot, "se", 1);
/* -------------------------------------------------------------------- */
/* get the root element (Filter). */
/* -------------------------------------------------------------------- */
psChild = psRoot;
psSLD = NULL;
while( psChild != NULL ) {
if (psChild->eType == CXT_Element &&
EQUAL(psChild->pszValue,"StyledLayerDescriptor")) {
psSLD = psChild;
break;
} else
psChild = psChild->psNext;
}
if (!psSLD) {
msSetError(MS_WMSERR, "Invalid SLD document : %s", "", psSLDXML);
return NULL;
}
/* -------------------------------------------------------------------- */
/* Parse the named layers. */
/* -------------------------------------------------------------------- */
psNamedLayer = CPLGetXMLNode(psSLD, "NamedLayer");
while (psNamedLayer) {
if (!psNamedLayer->pszValue ||
strcasecmp(psNamedLayer->pszValue, "NamedLayer") != 0) {
psNamedLayer = psNamedLayer->psNext;
continue;
}
psNamedLayer = psNamedLayer->psNext;
nLayers++;
}
if (nLayers > 0)
pasLayers = (layerObj *)malloc(sizeof(layerObj)*nLayers);
else
return NULL;
psNamedLayer = CPLGetXMLNode(psSLD, "NamedLayer");
if (psNamedLayer) {
iLayer = 0;
while (psNamedLayer)
{
if (!psNamedLayer->pszValue ||
strcasecmp(psNamedLayer->pszValue, "NamedLayer") != 0) {
psNamedLayer = psNamedLayer->psNext;
continue;
}
psName = CPLGetXMLNode(psNamedLayer, "Name");
initLayer(&pasLayers[iLayer], map);
if (psName && psName->psChild && psName->psChild->pszValue)
pasLayers[iLayer].name = msStrdup(psName->psChild->pszValue);
if( msSLDParseNamedLayer(psNamedLayer, &pasLayers[iLayer]) != MS_SUCCESS ) {
int i;
for (i=0; i<=iLayer; i++)
freeLayer(&pasLayers[i]);
msFree(pasLayers);
nLayers = 0;
pasLayers = NULL;
break;
}
psNamedLayer = psNamedLayer->psNext;
iLayer++;
}
}
if (pnLayers)
*pnLayers = nLayers;
if (psRoot)
CPLDestroyXMLNode(psRoot);
return pasLayers;
}
double _msSLDParseSizeParameter(CPLXMLNode *psSize)
{
double dSize = 0;
CPLXMLNode *psLiteral = NULL;
if (psSize) {
psLiteral = CPLGetXMLNode(psSize, "Literal");
if (psLiteral && psLiteral->psChild && psLiteral->psChild->pszValue)
dSize = atof(psLiteral->psChild->pszValue);
else if (psSize->psChild && psSize->psChild->pszValue)
dSize = atof(psSize->psChild->pszValue);
}
return dSize;
}
/************************************************************************/
/* _SLDApplyRuleValues */
/* */
/* Utility function to set the scale, title/name for the */
/* classes created by a Rule. */
/************************************************************************/
void _SLDApplyRuleValues(CPLXMLNode *psRule, layerObj *psLayer,
int nNewClasses)
{
int i=0;
CPLXMLNode *psMinScale=NULL, *psMaxScale=NULL;
CPLXMLNode *psName=NULL, *psTitle=NULL;
double dfMinScale=0, dfMaxScale=0;
char *pszName=NULL, *pszTitle=NULL;
if (psRule && psLayer && nNewClasses > 0) {
/* -------------------------------------------------------------------- */
/* parse minscale and maxscale. */
/* -------------------------------------------------------------------- */
psMinScale = CPLGetXMLNode(psRule,
"MinScaleDenominator");
if (psMinScale && psMinScale->psChild &&
psMinScale->psChild->pszValue)
dfMinScale = atof(psMinScale->psChild->pszValue);
psMaxScale = CPLGetXMLNode(psRule,
"MaxScaleDenominator");
if (psMaxScale && psMaxScale->psChild &&
psMaxScale->psChild->pszValue)
dfMaxScale = atof(psMaxScale->psChild->pszValue);
/* -------------------------------------------------------------------- */
/* parse name and title. */
/* -------------------------------------------------------------------- */
psName = CPLGetXMLNode(psRule, "Name");
if (psName && psName->psChild &&
psName->psChild->pszValue)
pszName = psName->psChild->pszValue;
psTitle = CPLGetXMLNode(psRule, "Title");
if (psTitle && psTitle->psChild &&
psTitle->psChild->pszValue)
pszTitle = psTitle->psChild->pszValue;
/* -------------------------------------------------------------------- */
/* set the scale to all the classes created by the rule. */
/* -------------------------------------------------------------------- */
if (dfMinScale > 0 || dfMaxScale > 0) {
for (i=0; i<nNewClasses; i++) {
if (dfMinScale > 0)
psLayer->class[psLayer->numclasses-1-i]->minscaledenom = dfMinScale;
if (dfMaxScale)
psLayer->class[psLayer->numclasses-1-i]->maxscaledenom = dfMaxScale;
}
}
/* -------------------------------------------------------------------- */
/* set name and title to the classes created by the rule. */
/* -------------------------------------------------------------------- */
for (i=0; i<nNewClasses; i++) {
if (!psLayer->class[psLayer->numclasses-1-i]->name) {
if (pszName)
psLayer->class[psLayer->numclasses-1-i]->name = msStrdup(pszName);
else if (pszTitle)
psLayer->class[psLayer->numclasses-1-i]->name = msStrdup(pszTitle);
else
psLayer->class[psLayer->numclasses-1-i]->name = msStrdup("Unknown");
}
}
if (pszTitle) {
for (i=0; i<nNewClasses; i++) {
psLayer->class[psLayer->numclasses-1-i]->title =
msStrdup(pszTitle);
}
}
}
}
/************************************************************************/
/* msSLDGetCommonExpressionFromFilter */
/* */
/* Get a commomn expression valid from the filter valid for the */
/* temporary layer. */
/************************************************************************/
static char* msSLDGetCommonExpressionFromFilter(CPLXMLNode* psFilter,
layerObj *psLayer)
{
char *pszExpression = NULL;
CPLXMLNode *psTmpNextNode = NULL;
CPLXMLNode *psTmpNode = NULL;
FilterEncodingNode *psNode = NULL;
char *pszTmpFilter = NULL;
layerObj *psCurrentLayer = NULL;
const char *pszWmsName=NULL;
const char *key=NULL;
/* clone the tree and set the next node to null */
/* so we only have the Filter node */
psTmpNode = CPLCloneXMLTree(psFilter);
psTmpNextNode = psTmpNode->psNext;
psTmpNode->psNext = NULL;
pszTmpFilter = CPLSerializeXMLTree(psTmpNode);
psTmpNode->psNext = psTmpNextNode;
CPLDestroyXMLNode(psTmpNode);
if (pszTmpFilter) {
psNode = FLTParseFilterEncoding(pszTmpFilter);
CPLFree(pszTmpFilter);
}
if (psNode) {
int j;
/*preparse the filter for possible gml aliases set on the layer's metada:
"gml_NA3DESC_alias" "alias_name" and filter could be
<ogc:PropertyName>alias_name</ogc:PropertyName> #3079*/
for (j=0; j<psLayer->map->numlayers; j++) {
psCurrentLayer = GET_LAYER(psLayer->map, j);
pszWmsName = msOWSLookupMetadata(&(psCurrentLayer->metadata), "MO", "name");
if ((psCurrentLayer->name && psLayer->name &&
strcasecmp(psCurrentLayer->name, psLayer->name) == 0) ||
(psCurrentLayer->group && psLayer->name &&
strcasecmp(psCurrentLayer->group, psLayer->name) == 0) ||
(psLayer->name && pszWmsName &&
strcasecmp(pszWmsName, psLayer->name) == 0))
break;
}
if (j < psLayer->map->numlayers) {
/*make sure that the tmp layer has all the metadata that
the orinal layer has, allowing to do parsing for
such things as gml_attribute_type #3052*/
while (1) {
key = msNextKeyFromHashTable(&psCurrentLayer->metadata, key);
if (!key)
break;
else
msInsertHashTable(&psLayer->metadata, key,
msLookupHashTable(&psCurrentLayer->metadata, key));
}
FLTPreParseFilterForAliasAndGroup(psNode, psLayer->map, j, "G");
}
pszExpression = FLTGetCommonExpression(psNode, psLayer);
FLTFreeFilterEncodingNode(psNode);
}
return pszExpression;
}
/************************************************************************/
/* msSLDParseNamedLayer */
/* */
/* Parse NamedLayer root. */
/************************************************************************/
int msSLDParseNamedLayer(CPLXMLNode *psRoot, layerObj *psLayer)
{
CPLXMLNode *psFeatureTypeStyle, *psRule, *psUserStyle;
CPLXMLNode *psSLDName = NULL, *psNamedStyle=NULL;
CPLXMLNode *psElseFilter = NULL, *psFilter=NULL;
CPLXMLNode *psLayerFeatureConstraints = NULL;
int nNewClasses=0, nClassBeforeFilter=0, nClassAfterFilter=0;
int nClassAfterRule=0, nClassBeforeRule=0;
if (!psRoot || !psLayer)
return MS_FAILURE;
psUserStyle = CPLGetXMLNode(psRoot, "UserStyle");
if (psUserStyle) {
psFeatureTypeStyle = CPLGetXMLNode(psUserStyle, "FeatureTypeStyle");
if (psFeatureTypeStyle) {
while (psFeatureTypeStyle && psFeatureTypeStyle->pszValue &&
strcasecmp(psFeatureTypeStyle->pszValue,
"FeatureTypeStyle") == 0) {
if (!psFeatureTypeStyle->pszValue ||
strcasecmp(psFeatureTypeStyle->pszValue,
"FeatureTypeStyle") != 0) {
psFeatureTypeStyle = psFeatureTypeStyle->psNext;
continue;
}
/* -------------------------------------------------------------------- */
/* Parse rules with no Else filter. */
/* -------------------------------------------------------------------- */
psRule = CPLGetXMLNode(psFeatureTypeStyle, "Rule");
while (psRule) {
if (!psRule->pszValue ||
strcasecmp(psRule->pszValue, "Rule") != 0) {
psRule = psRule->psNext;
continue;
}
/* used for scale setting */
nClassBeforeRule = psLayer->numclasses;
psElseFilter = CPLGetXMLNode(psRule, "ElseFilter");
nClassBeforeFilter = psLayer->numclasses;
if (psElseFilter == NULL)
msSLDParseRule(psRule, psLayer);
nClassAfterFilter = psLayer->numclasses;
/* -------------------------------------------------------------------- */
/* Parse the filter and apply it to the latest class created by */
/* the rule. */
/* NOTE : Spatial Filter is not supported. */
/* -------------------------------------------------------------------- */
psFilter = CPLGetXMLNode(psRule, "Filter");
if (psFilter && psFilter->psChild && psFilter->psChild->pszValue) {
char* pszExpression = msSLDGetCommonExpressionFromFilter(psFilter,
psLayer);
if (pszExpression) {
int i;
nNewClasses =
nClassAfterFilter - nClassBeforeFilter;
for (i=0; i<nNewClasses; i++) {
expressionObj* exp = &(psLayer->
class[psLayer->numclasses-1-i]->
expression);
msFreeExpression(exp);
msInitExpression(exp);
exp->string = msStrdup(pszExpression);
exp->type = MS_EXPRESSION;
}
msFree(pszExpression);
pszExpression = NULL;
}
}
nClassAfterRule = psLayer->numclasses;
nNewClasses = nClassAfterRule - nClassBeforeRule;
/* apply scale and title to newly created classes */
_SLDApplyRuleValues(psRule, psLayer, nNewClasses);
/* TODO : parse legendgraphic */
psRule = psRule->psNext;
}
/* -------------------------------------------------------------------- */
/* First parse rules with the else filter. These rules will */
/* create the classes that are placed at the end of class */
/* list. (See how classes are applied to layers in function */
/* msSLDApplySLD). */
/* -------------------------------------------------------------------- */
psRule = CPLGetXMLNode(psFeatureTypeStyle, "Rule");
while (psRule) {
if (!psRule->pszValue ||
strcasecmp(psRule->pszValue, "Rule") != 0) {
psRule = psRule->psNext;
continue;
}
psElseFilter = CPLGetXMLNode(psRule, "ElseFilter");
if (psElseFilter) {
msSLDParseRule(psRule, psLayer);
_SLDApplyRuleValues(psRule, psLayer, 1);
}
psRule = psRule->psNext;
}
psFeatureTypeStyle = psFeatureTypeStyle->psNext;
}
}
}
/* check for Named styles*/
else {
psNamedStyle = CPLGetXMLNode(psRoot, "NamedStyle");
if (psNamedStyle) {
psSLDName = CPLGetXMLNode(psNamedStyle, "Name");
if (psSLDName && psSLDName->psChild && psSLDName->psChild->pszValue) {
msFree(psLayer->classgroup);
psLayer->classgroup = msStrdup(psSLDName->psChild->pszValue);
}
}
}
/* Deal with LayerFeatureConstraints */
psLayerFeatureConstraints = CPLGetXMLNode(psRoot, "LayerFeatureConstraints");
if( psLayerFeatureConstraints != NULL ) {
CPLXMLNode* psIter = psLayerFeatureConstraints->psChild;
CPLXMLNode* psFeatureTypeConstraint = NULL;
for(; psIter != NULL; psIter = psIter->psNext ) {
if( psIter->eType == CXT_Element &&
strcmp(psIter->pszValue, "FeatureTypeConstraint") == 0 ) {
if( psFeatureTypeConstraint == NULL ) {
psFeatureTypeConstraint = psIter;
} else {
msSetError(MS_WMSERR, "Only one single FeatureTypeConstraint element "
"per LayerFeatureConstraints is supported", "");
return MS_FAILURE;
}
}
}
if( psFeatureTypeConstraint != NULL ) {
if( CPLGetXMLNode(psFeatureTypeConstraint, "FeatureTypeName") != NULL ) {
msSetError(MS_WMSERR, "FeatureTypeName element is not "
"supported in FeatureTypeConstraint", "");
return MS_FAILURE;
}
if( CPLGetXMLNode(psFeatureTypeConstraint, "Extent") != NULL ) {
msSetError(MS_WMSERR, "Extent element is not "
"supported in FeatureTypeConstraint", "");
return MS_FAILURE;
}
psFilter = CPLGetXMLNode(psFeatureTypeConstraint, "Filter");
if (psFilter && psFilter->psChild && psFilter->psChild->pszValue) {
char* pszExpression = msSLDGetCommonExpressionFromFilter(psFilter,
psLayer);
if (pszExpression) {
msInitExpression(&psLayer->filter);
psLayer->filter.string = pszExpression;
psLayer->filter.type = MS_EXPRESSION;
}
}
}
}
return MS_SUCCESS;
}
/************************************************************************/
/* void msSLDParseRule(CPLXMLNode *psRoot, layerObj *psLayer) */
/* */
/* Parse a Rule node into classes for a spcific layer. */
/************************************************************************/