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maplayer.c
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maplayer.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: Implementation of most layerObj functions.
* Author: Steve Lime and the MapServer team.
*
******************************************************************************
* Copyright (c) 1996-2005 Regents of the University of Minnesota.
*
* 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
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include "mapserver.h"
#include "maptime.h"
#include "mapogcfilter.h"
#include "mapthread.h"
#include "mapfile.h"
#include "mapparser.h"
#include <assert.h>
static int populateVirtualTable(layerVTableObj *vtable);
/*
** Iteminfo is a layer parameter that holds information necessary to retrieve an individual item for
** a particular source. It is an array built from a list of items. The type of iteminfo will vary by
** source. For shapefiles and OGR it is simply an array of integers where each value is an index for
** the item. For SDE it's a ESRI specific type that contains index and column type information. Two
** helper functions below initialize and free that structure member which is used locally by layer
** specific functions.
*/
int msLayerInitItemInfo(layerObj *layer)
{
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
return layer->vtable->LayerInitItemInfo(layer);
}
void msLayerFreeItemInfo(layerObj *layer)
{
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return;
}
layer->vtable->LayerFreeItemInfo(layer);
}
int msLayerRestoreFromScaletokens(layerObj *layer)
{
if(!layer->scaletokens) {
return MS_SUCCESS;
}
if(layer->orig_data) {
msFree(layer->data);
layer->data = layer->orig_data;
layer->orig_data = NULL;
}
if(layer->orig_tileindex) {
msFree(layer->tileindex);
layer->tileindex = layer->orig_tileindex;
layer->orig_tileindex = NULL;
}
if(layer->orig_tileitem) {
msFree(layer->tileitem);
layer->tileitem = layer->orig_tileitem;
layer->orig_tileitem = NULL;
}
if(layer->orig_filter) {
msLoadExpressionString(&(layer->filter),layer->orig_filter);
msFree(layer->orig_filter);
layer->orig_filter = NULL;
}
if(layer->orig_filteritem) {
msFree(layer->filteritem);
layer->filteritem = layer->orig_filteritem;
layer->orig_filteritem = NULL;
}
return MS_SUCCESS;
}
int msLayerApplyScaletokens(layerObj *layer, double scale)
{
int i;
if(!layer->scaletokens) {
return MS_SUCCESS;
}
msLayerRestoreFromScaletokens(layer);
for(i=0;i<layer->numscaletokens;i++) {
scaleTokenObj *st = &layer->scaletokens[i];
scaleTokenEntryObj *ste = NULL;
if(scale<=0) {
ste = &(st->tokens[0]);
/* no scale defined, use first entry */
} else {
int tokenindex=0;
while(tokenindex<st->n_entries) {
ste = &(st->tokens[tokenindex]);
if(scale < ste->maxscale && scale >= ste->minscale) break; /* current token is the correct one */
tokenindex++;
ste = NULL;
}
}
assert(ste);
if(layer->data && strstr(layer->data,st->name)) {
if(layer->debug >= MS_DEBUGLEVEL_DEBUG) {
msDebug("replacing scaletoken (%s) with (%s) in layer->data (%s) for scale=%f\n",
st->name,ste->value,layer->name,scale);
}
layer->orig_data = layer->data;
layer->data = msStrdup(layer->data);
layer->data = msReplaceSubstring(layer->data,st->name,ste->value);
}
if(layer->tileindex && strstr(layer->tileindex,st->name)) {
if(layer->debug >= MS_DEBUGLEVEL_DEBUG) {
msDebug("replacing scaletoken (%s) with (%s) in layer->tileindex (%s) for scale=%f\n",
st->name,ste->value,layer->name,scale);
}
layer->orig_tileindex = layer->tileindex;
layer->tileindex = msStrdup(layer->tileindex);
layer->tileindex = msReplaceSubstring(layer->tileindex,st->name,ste->value);
}
if(layer->tileitem && strstr(layer->tileitem,st->name)) {
if(layer->debug >= MS_DEBUGLEVEL_DEBUG) {
msDebug("replacing scaletoken (%s) with (%s) in layer->tileitem (%s) for scale=%f\n",
st->name,ste->value,layer->name,scale);
}
layer->orig_tileitem = layer->tileitem;
layer->tileitem = msStrdup(layer->tileitem);
layer->tileitem = msReplaceSubstring(layer->tileitem,st->name,ste->value);
}
if(layer->filteritem && strstr(layer->filteritem,st->name)) {
if(layer->debug >= MS_DEBUGLEVEL_DEBUG) {
msDebug("replacing scaletoken (%s) with (%s) in layer->filteritem (%s) for scale=%f\n",
st->name,ste->value,layer->name,scale);
}
layer->orig_filteritem = layer->filteritem;
layer->filteritem = msStrdup(layer->filteritem);
layer->filteritem = msReplaceSubstring(layer->filteritem,st->name,ste->value);
}
if(layer->filter.string && strstr(layer->filter.string,st->name)) {
char *tmpval;
if(layer->debug >= MS_DEBUGLEVEL_DEBUG) {
msDebug("replacing scaletoken (%s) with (%s) in layer->filter (%s) for scale=%f\n",
st->name,ste->value,layer->name,scale);
}
layer->orig_filter = msStrdup(layer->filter.string);
tmpval = msStrdup(layer->filter.string);
tmpval = msReplaceSubstring(tmpval,st->name,ste->value);
if(msLoadExpressionString(&(layer->filter),tmpval) == -1) return(MS_FAILURE); /* loadExpression() cleans up previously allocated expression */
msFree(tmpval);
}
}
return MS_SUCCESS;
}
/*
** Does exactly what it implies, readies a layer for processing.
*/
int msLayerOpen(layerObj *layer)
{
int rv;
/* RFC-86 Scale dependant token replacements*/
rv = msLayerApplyScaletokens(layer,(layer->map)?layer->map->scaledenom:-1);
if (rv != MS_SUCCESS) return rv;
/* RFC-69 clustering support */
if (layer->cluster.region)
return msClusterLayerOpen(layer);
if(layer->features && layer->connectiontype != MS_GRATICULE )
layer->connectiontype = MS_INLINE;
if(layer->tileindex && layer->connectiontype == MS_SHAPEFILE)
layer->connectiontype = MS_TILED_SHAPEFILE;
if(layer->type == MS_LAYER_RASTER && layer->connectiontype != MS_WMS)
layer->connectiontype = MS_RASTER;
if ( ! layer->vtable) {
rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
return layer->vtable->LayerOpen(layer);
}
/*
** Returns MS_TRUE if layer has been opened using msLayerOpen(), MS_FALSE otherwise
*/
int msLayerIsOpen(layerObj *layer)
{
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
return layer->vtable->LayerIsOpen(layer);
}
/*
** Returns MS_TRUE is a layer supports the common expression/filter syntax (RFC 64) and MS_FALSE otherwise.
*/
int msLayerSupportsCommonFilters(layerObj *layer)
{
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
return layer->vtable->LayerSupportsCommonFilters(layer);
}
/*
** Performs a spatial, and optionally an attribute based feature search. The function basically
** prepares things so that candidate features can be accessed by query or drawing functions. For
** OGR and shapefiles this sets an internal bit vector that indicates whether a particular feature
** is to processed. For SDE it executes an SQL statement on the SDE server. Once run the msLayerNextShape
** function should be called to actually access the shapes.
**
** Note that for shapefiles we apply any maxfeatures constraint at this point. That may be the only
** connection type where this is feasible.
*/
int msLayerWhichShapes(layerObj *layer, rectObj rect, int isQuery)
{
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
return layer->vtable->LayerWhichShapes(layer, rect, isQuery);
}
/*
** Called after msWhichShapes has been called to actually retrieve shapes within a given area
** and matching a vendor specific filter (i.e. layer FILTER attribute).
**
** Shapefiles: NULL shapes (shapes with attributes but NO vertices are skipped)
*/
int msLayerNextShape(layerObj *layer, shapeObj *shape)
{
int rv;
if ( ! layer->vtable) {
rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
/* At the end of switch case (default -> break; -> return MS_FAILURE),
* was following TODO ITEM:
*/
/* TO DO! This is where dynamic joins will happen. Joined attributes will be */
/* tagged on to the main attributes with the naming scheme [join name].[item name]. */
/* We need to leverage the iteminfo (I think) at this point */
rv = layer->vtable->LayerNextShape(layer, shape);
/* RFC89 Apply Layer GeomTransform */
if(layer->_geomtransform.type != MS_GEOMTRANSFORM_NONE && rv == MS_SUCCESS) {
rv = msGeomTransformShape(layer->map, layer, shape);
}
return rv;
}
/*
** Used to retrieve a shape from a result set by index. Result sets are created by the various
** msQueryBy...() functions. The index is assigned by the data source.
*/
/* int msLayerResultsGetShape(layerObj *layer, shapeObj *shape, int tile, long record)
{
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
return layer->vtable->LayerResultsGetShape(layer, shape, tile, record);
} */
/*
** Used to retrieve a shape by index. All data sources must be capable of random access using
** a record number(s) of some sort.
*/
int msLayerGetShape(layerObj *layer, shapeObj *shape, resultObj *record)
{
int rv;
if( ! layer->vtable) {
rv = msInitializeVirtualTable(layer);
if(rv != MS_SUCCESS)
return rv;
}
/*
** TODO: This is where dynamic joins could happen. Joined attributes would be
** tagged on to the main attributes with the naming scheme [join name].[item name].
*/
rv = layer->vtable->LayerGetShape(layer, shape, record);
/* RFC89 Apply Layer GeomTransform */
if(layer->_geomtransform.type != MS_GEOMTRANSFORM_NONE && rv == MS_SUCCESS) {
rv = msGeomTransformShape(layer->map, layer, shape);
}
return rv;
}
/*
** Closes resources used by a particular layer.
*/
void msLayerClose(layerObj *layer)
{
int i,j,k;
/* no need for items once the layer is closed */
msLayerFreeItemInfo(layer);
if(layer->items) {
msFreeCharArray(layer->items, layer->numitems);
layer->items = NULL;
layer->numitems = 0;
}
/* clear out items used as part of expressions (bug #2702) -- what about the layer filter? */
freeExpressionTokens(&(layer->filter));
freeExpressionTokens(&(layer->cluster.group));
freeExpressionTokens(&(layer->cluster.filter));
for(i=0; i<layer->numclasses; i++) {
freeExpressionTokens(&(layer->class[i]->expression));
freeExpressionTokens(&(layer->class[i]->text));
for(j=0; j<layer->class[i]->numstyles; j++)
freeExpressionTokens(&(layer->class[i]->styles[j]->_geomtransform));
for(k=0; k<layer->class[i]->numlabels; k++) {
freeExpressionTokens(&(layer->class[i]->labels[k]->expression));
freeExpressionTokens(&(layer->class[i]->labels[k]->text));
}
}
if (layer->vtable) {
layer->vtable->LayerClose(layer);
}
msLayerRestoreFromScaletokens(layer);
}
/*
** Retrieves a list of attributes available for this layer. Most sources also set the iteminfo array
** at this point. This function is used when processing query results to expose attributes to query
** templates. At that point all attributes are fair game.
*/
int msLayerGetItems(layerObj *layer)
{
const char *itemNames;
/* clean up any previously allocated instances */
msLayerFreeItemInfo(layer);
if(layer->items) {
msFreeCharArray(layer->items, layer->numitems);
layer->items = NULL;
layer->numitems = 0;
}
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
/* At the end of switch case (default -> break; -> return MS_FAILURE),
* was following TODO ITEM:
*/
/* TO DO! Need to add any joined itemd on to the core layer items, one long list! */
itemNames = msLayerGetProcessingKey( layer, "ITEMS" );
if (itemNames) {
layer->items = msStringSplit(itemNames, ',', &layer->numitems);
/* populate the iteminfo array */
return (msLayerInitItemInfo(layer));
} else
return layer->vtable->LayerGetItems(layer);
}
/*
** Returns extent of spatial coverage for a layer.
**
** If layer->extent is set then this value is used, otherwise the
** driver-specific implementation is called (this can be expensive).
**
** If layer is not already opened then it is opened and closed (so this
** function can be called on both opened or closed layers).
**
** Returns MS_SUCCESS/MS_FAILURE.
*/
int msLayerGetExtent(layerObj *layer, rectObj *extent)
{
int need_to_close = MS_FALSE, status = MS_SUCCESS;
if (MS_VALID_EXTENT(layer->extent)) {
*extent = layer->extent;
return MS_SUCCESS;
}
if (!msLayerIsOpen(layer)) {
if (msLayerOpen(layer) != MS_SUCCESS)
return MS_FAILURE;
need_to_close = MS_TRUE;
}
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS) {
if (need_to_close)
msLayerClose(layer);
return rv;
}
}
status = layer->vtable->LayerGetExtent(layer, extent);
if (need_to_close)
msLayerClose(layer);
return(status);
}
int msLayerGetItemIndex(layerObj *layer, char *item)
{
int i;
for(i=0; i<layer->numitems; i++) {
if(strcasecmp(layer->items[i], item) == 0) return(i);
}
return -1; /* item not found */
}
static int string2list(char **list, int *listsize, char *string)
{
int i;
for(i=0; i<(*listsize); i++)
if(strcasecmp(list[i], string) == 0) {
/* printf("string2list (duplicate): %s %d\n", string, i); */
return(i);
}
list[i] = msStrdup(string);
(*listsize)++;
/* printf("string2list: %s %d\n", string, i); */
return(i);
}
extern int msyylex(void);
extern int msyylex_destroy(void);
extern int msyystate;
extern char *msyystring; /* string to tokenize */
extern double msyynumber; /* token containers */
extern char *msyystring_buffer;
int msTokenizeExpression(expressionObj *expression, char **list, int *listsize)
{
tokenListNodeObjPtr node;
int token;
/* TODO: make sure the constants can't somehow reference invalid expression types */
/* if(expression->type != MS_EXPRESSION && expression->type != MS_GEOMTRANSFORM_EXPRESSION) return MS_SUCCESS; */
msAcquireLock(TLOCK_PARSER);
msyystate = MS_TOKENIZE_EXPRESSION;
msyystring = expression->string; /* the thing we're tokenizing */
while((token = msyylex()) != 0) { /* keep processing tokens until the end of the string (\0) */
if((node = (tokenListNodeObjPtr) malloc(sizeof(tokenListNodeObj))) == NULL) {
msSetError(MS_MEMERR, NULL, "msTokenizeExpression()");
goto parse_error;
}
node->tailifhead = NULL;
node->next = NULL;
switch(token) {
case MS_TOKEN_LITERAL_NUMBER:
node->token = token;
node->tokenval.dblval = msyynumber;
break;
case MS_TOKEN_LITERAL_STRING:
node->token = token;
node->tokenval.strval = msStrdup(msyystring_buffer);
break;
case MS_TOKEN_LITERAL_TIME:
node->token = token;
msTimeInit(&(node->tokenval.tmval));
if(msParseTime(msyystring_buffer, &(node->tokenval.tmval)) != MS_TRUE) {
msSetError(MS_PARSEERR, "Parsing time value failed.", "msTokenizeExpression()");
goto parse_error;
}
break;
case MS_TOKEN_BINDING_DOUBLE: /* we've encountered an attribute (binding) reference */
case MS_TOKEN_BINDING_INTEGER:
case MS_TOKEN_BINDING_STRING:
case MS_TOKEN_BINDING_TIME:
node->token = token; /* binding type */
node->tokenval.bindval.item = msStrdup(msyystring_buffer);
if(list) node->tokenval.bindval.index = string2list(list, listsize, msyystring_buffer);
break;
case MS_TOKEN_BINDING_SHAPE:
node->token = token;
break;
case MS_TOKEN_BINDING_MAP_CELLSIZE:
node->token = token;
break;
case MS_TOKEN_FUNCTION_FROMTEXT: /* we want to process a shape from WKT once and not for every feature being evaluated */
if((token = msyylex()) != 40) { /* ( */
msSetError(MS_PARSEERR, "Parsing fromText function failed.", "msTokenizeExpression()");
goto parse_error;
}
if((token = msyylex()) != MS_TOKEN_LITERAL_STRING) {
msSetError(MS_PARSEERR, "Parsing fromText function failed.", "msTokenizeExpression()");
goto parse_error;
}
node->token = MS_TOKEN_LITERAL_SHAPE;
node->tokenval.shpval = msShapeFromWKT(msyystring_buffer);
if(!node->tokenval.shpval) {
msSetError(MS_PARSEERR, "Parsing fromText function failed, WKT processing failed.", "msTokenizeExpression()");
goto parse_error;
}
/* todo: perhaps process optional args (e.g. projection) */
if((token = msyylex()) != 41) { /* ) */
msSetError(MS_PARSEERR, "Parsing fromText function failed.", "msTokenizeExpression()");
goto parse_error;
}
break;
default:
node->token = token; /* for everything else */
break;
}
/* add node to token list */
if(expression->tokens == NULL) {
expression->tokens = node;
} else {
if(expression->tokens->tailifhead != NULL) /* this should never be NULL, but just in case */
expression->tokens->tailifhead->next = node; /* put the node at the end of the list */
}
/* repoint the head of the list to the end - our new element
this causes a loop if we are at the head, be careful not to
walk in a loop */
expression->tokens->tailifhead = node;
}
expression->curtoken = expression->tokens; /* point at the first token */
msReleaseLock(TLOCK_PARSER);
return MS_SUCCESS;
parse_error:
msReleaseLock(TLOCK_PARSER);
return MS_FAILURE;
}
/*
** This function builds a list of items necessary to draw or query a particular layer by
** examining the contents of the various xxxxitem parameters and expressions. That list is
** then used to set the iteminfo variable.
*/
int msLayerWhichItems(layerObj *layer, int get_all, char *metadata)
{
int i, j, k, l, rv;
int nt=0;
if (!layer->vtable) {
rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS) return rv;
}
/* Cleanup any previous item selection */
msLayerFreeItemInfo(layer);
if(layer->items) {
msFreeCharArray(layer->items, layer->numitems);
layer->items = NULL;
layer->numitems = 0;
}
/*
** need a count of potential items/attributes needed
*/
/* layer level counts */
layer->classitemindex = -1;
layer->filteritemindex = -1;
layer->styleitemindex = -1;
layer->labelitemindex = -1;
if(layer->classitem) nt++;
if(layer->filteritem) nt++;
if(layer->styleitem && strcasecmp(layer->styleitem, "AUTO") != 0) nt++;
if(layer->filter.type == MS_EXPRESSION)
nt += msCountChars(layer->filter.string, '[');
if(layer->cluster.group.type == MS_EXPRESSION)
nt += msCountChars(layer->cluster.group.string, '[');
if(layer->cluster.filter.type == MS_EXPRESSION)
nt += msCountChars(layer->cluster.filter.string, '[');
if(layer->labelitem) nt++;
if(layer->_geomtransform.type == MS_GEOMTRANSFORM_EXPRESSION)
msTokenizeExpression(&layer->_geomtransform, layer->items, &(layer->numitems));
/* class level counts */
for(i=0; i<layer->numclasses; i++) {
for(j=0; j<layer->class[i]->numstyles; j++) {
if(layer->class[i]->styles[j]->rangeitem) nt++;
nt += layer->class[i]->styles[j]->numbindings;
if(layer->class[i]->styles[j]->_geomtransform.type == MS_GEOMTRANSFORM_EXPRESSION)
nt += msCountChars(layer->class[i]->styles[j]->_geomtransform.string, '[');
}
if(layer->class[i]->expression.type == MS_EXPRESSION)
nt += msCountChars(layer->class[i]->expression.string, '[');
for(l=0; l<layer->class[i]->numlabels; l++) {
nt += layer->class[i]->labels[l]->numbindings;
for(j=0; j<layer->class[i]->labels[l]->numstyles; j++) {
if(layer->class[i]->labels[l]->styles[j]->rangeitem) nt++;
nt += layer->class[i]->labels[l]->styles[j]->numbindings;
if(layer->class[i]->labels[l]->styles[j]->_geomtransform.type == MS_GEOMTRANSFORM_EXPRESSION)
nt += msCountChars(layer->class[i]->labels[l]->styles[j]->_geomtransform.string, '[');
}
if(layer->class[i]->labels[l]->expression.type == MS_EXPRESSION)
nt += msCountChars(layer->class[i]->labels[l]->expression.string, '[');
if(layer->class[i]->labels[l]->text.type == MS_EXPRESSION || (layer->class[i]->labels[l]->text.string && strchr(layer->class[i]->labels[l]->text.string,'[') != NULL && strchr(layer->class[i]->labels[l]->text.string,']') != NULL))
nt += msCountChars(layer->class[i]->labels[l]->text.string, '[');
}
if(layer->class[i]->text.type == MS_EXPRESSION || (layer->class[i]->text.string && strchr(layer->class[i]->text.string,'[') != NULL && strchr(layer->class[i]->text.string,']') != NULL))
nt += msCountChars(layer->class[i]->text.string, '[');
}
/*
** allocate space for the item list (worse case size)
*/
/* always retrieve all items in some cases */
if(layer->connectiontype == MS_INLINE || get_all == MS_TRUE ||
(layer->map->outputformat && layer->map->outputformat->renderer == MS_RENDER_WITH_KML)) {
msLayerGetItems(layer);
if(nt > 0) /* need to realloc the array to accept the possible new items*/
layer->items = (char **)msSmallRealloc(layer->items, sizeof(char *)*(layer->numitems + nt));
} else {
rv = layer->vtable->LayerCreateItems(layer, nt);
if(rv != MS_SUCCESS)
return rv;
}
/*
** build layer item list, compute item indexes for explicity item references (e.g. classitem) or item bindings
*/
if(nt > 0) {
/* layer items */
if(layer->classitem) layer->classitemindex = string2list(layer->items, &(layer->numitems), layer->classitem);
if(layer->filteritem) layer->filteritemindex = string2list(layer->items, &(layer->numitems), layer->filteritem);
if(layer->styleitem && strcasecmp(layer->styleitem, "AUTO") != 0) layer->styleitemindex = string2list(layer->items, &(layer->numitems), layer->styleitem);
if(layer->labelitem) layer->labelitemindex = string2list(layer->items, &(layer->numitems), layer->labelitem);
/* layer classes */
for(i=0; i<layer->numclasses; i++) {
/* class expression */
if(layer->class[i]->expression.type == MS_EXPRESSION) msTokenizeExpression(&(layer->class[i]->expression), layer->items, &(layer->numitems));
/* class styles (items, bindings, geomtransform) */
for(j=0; j<layer->class[i]->numstyles; j++) {
if(layer->class[i]->styles[j]->rangeitem) layer->class[i]->styles[j]->rangeitemindex = string2list(layer->items, &(layer->numitems), layer->class[i]->styles[j]->rangeitem);
for(k=0; k<MS_STYLE_BINDING_LENGTH; k++)
if(layer->class[i]->styles[j]->bindings[k].item) layer->class[i]->styles[j]->bindings[k].index = string2list(layer->items, &(layer->numitems), layer->class[i]->styles[j]->bindings[k].item);
if(layer->class[i]->styles[j]->_geomtransform.type == MS_GEOMTRANSFORM_EXPRESSION)
msTokenizeExpression(&(layer->class[i]->styles[j]->_geomtransform), layer->items, &(layer->numitems));
}
/* class labels and label styles (items, bindings, geomtransform) */
for(l=0; l<layer->class[i]->numlabels; l++) {
for(j=0; j<layer->class[i]->labels[l]->numstyles; j++) {
if(layer->class[i]->labels[l]->styles[j]->rangeitem) layer->class[i]->labels[l]->styles[j]->rangeitemindex = string2list(layer->items, &(layer->numitems), layer->class[i]->labels[l]->styles[j]->rangeitem);
for(k=0; k<MS_STYLE_BINDING_LENGTH; k++)
if(layer->class[i]->labels[l]->styles[j]->bindings[k].item) layer->class[i]->labels[l]->styles[j]->bindings[k].index = string2list(layer->items, &(layer->numitems), layer->class[i]->labels[l]->styles[j]->bindings[k].item);
if(layer->class[i]->labels[l]->styles[j]->_geomtransform.type == MS_GEOMTRANSFORM_EXPRESSION)
msTokenizeExpression(&(layer->class[i]->labels[l]->styles[j]->_geomtransform), layer->items, &(layer->numitems));
}
for(k=0; k<MS_LABEL_BINDING_LENGTH; k++)
if(layer->class[i]->labels[l]->bindings[k].item) layer->class[i]->labels[l]->bindings[k].index = string2list(layer->items, &(layer->numitems), layer->class[i]->labels[l]->bindings[k].item);
/* label expression */
if(layer->class[i]->labels[l]->expression.type == MS_EXPRESSION) msTokenizeExpression(&(layer->class[i]->labels[l]->expression), layer->items, &(layer->numitems));
/* label text */
if(layer->class[i]->labels[l]->text.type == MS_EXPRESSION || (layer->class[i]->labels[l]->text.string && strchr(layer->class[i]->labels[l]->text.string,'[') != NULL && strchr(layer->class[i]->labels[l]->text.string,']') != NULL))
msTokenizeExpression(&(layer->class[i]->labels[l]->text), layer->items, &(layer->numitems));
}
/* class text */
if(layer->class[i]->text.type == MS_EXPRESSION || (layer->class[i]->text.string && strchr(layer->class[i]->text.string,'[') != NULL && strchr(layer->class[i]->text.string,']') != NULL))
msTokenizeExpression(&(layer->class[i]->text), layer->items, &(layer->numitems));
}
/* layer filter */
if(layer->filter.type == MS_EXPRESSION) msTokenizeExpression(&(layer->filter), layer->items, &(layer->numitems));
/* cluster expressions */
if(layer->cluster.group.type == MS_EXPRESSION) msTokenizeExpression(&(layer->cluster.group), layer->items, &(layer->numitems));
if(layer->cluster.filter.type == MS_EXPRESSION) msTokenizeExpression(&(layer->cluster.filter), layer->items, &(layer->numitems));
}
if(metadata) {
char **tokens;
int n = 0;
int j;
int bFound = 0;
tokens = msStringSplit(metadata, ',', &n);
if(tokens) {
for(i=0; i<n; i++) {
bFound = 0;
for(j=0; j<layer->numitems; j++) {
if(strcmp(tokens[i], layer->items[j]) == 0) {
bFound = 1;
break;
}
}
if(!bFound) {
layer->numitems++;
layer->items = (char **)msSmallRealloc(layer->items, sizeof(char *)*(layer->numitems));
layer->items[layer->numitems-1] = msStrdup(tokens[i]);
}
}
msFreeCharArray(tokens, n);
}
}
/* populate the iteminfo array */
if(layer->numitems == 0)
return(MS_SUCCESS);
return(msLayerInitItemInfo(layer));
}
/*
** A helper function to set the items to be retrieved with a particular shape. Unused at the moment but will be used
** from within MapScript. Should not need modification.
*/
int msLayerSetItems(layerObj *layer, char **items, int numitems)
{
int i;
/* Cleanup any previous item selection */
msLayerFreeItemInfo(layer);
if(layer->items) {
msFreeCharArray(layer->items, layer->numitems);
layer->items = NULL;
layer->numitems = 0;
}
/* now allocate and set the layer item parameters */
layer->items = (char **)malloc(sizeof(char *)*numitems);
MS_CHECK_ALLOC(layer->items, sizeof(char *)*numitems, MS_FAILURE);
for(i=0; i<numitems; i++)
layer->items[i] = msStrdup(items[i]);
layer->numitems = numitems;
/* populate the iteminfo array */
return(msLayerInitItemInfo(layer));
return(MS_SUCCESS);
}
/*
** Fills a classObj with style info from the specified shape. This is used
** with STYLEITEM AUTO when rendering shapes.
** For optimal results, this should be called immediately after
** GetNextShape() or GetShape() so that the shape doesn't have to be read
** twice.
**
*/
int msLayerGetAutoStyle(mapObj *map, layerObj *layer, classObj *c, shapeObj* shape)
{
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
return layer->vtable->LayerGetAutoStyle(map, layer, c, shape);
}
/*
** Fills a classObj with style info from the specified attribute. This is used
** with STYLEITEM "attribute" when rendering shapes.
**
*/
int msLayerGetFeatureStyle(mapObj *map, layerObj *layer, classObj *c, shapeObj* shape)
{
char* stylestring;
if (layer->styleitem && layer->styleitemindex >=0) {
stylestring = shape->values[layer->styleitemindex];
/* try to find out the current style format */
if (strncasecmp(stylestring,"style",5) == 0) {
resetClassStyle(c);
c->layer = layer;
if (msMaybeAllocateClassStyle(c, 0))
return(MS_FAILURE);
msUpdateStyleFromString(c->styles[0], stylestring, MS_FALSE);
if(c->styles[0]->symbolname) {
if((c->styles[0]->symbol = msGetSymbolIndex(&(map->symbolset), c->styles[0]->symbolname, MS_TRUE)) == -1) {
msSetError(MS_MISCERR, "Undefined symbol \"%s\" in class of layer %s.", "msLayerGetFeatureStyle()",
c->styles[0]->symbolname, layer->name);
return MS_FAILURE;
}
}
} else if (strncasecmp(stylestring,"class",5) == 0) {
if (strcasestr(stylestring, " style ") != NULL) {
/* reset style if stylestring contains style definitions */
resetClassStyle(c);
c->layer = layer;
}
msUpdateClassFromString(c, stylestring, MS_FALSE);
} else if (strncasecmp(stylestring,"pen",3) == 0 || strncasecmp(stylestring,"brush",5) == 0 ||
strncasecmp(stylestring,"symbol",6) == 0 || strncasecmp(stylestring,"label",5) == 0) {
msOGRUpdateStyleFromString(map, layer, c, stylestring);
} else {
resetClassStyle(c);
}
return MS_SUCCESS;
}
return MS_FAILURE;
}
/*
Returns the number of inline feature of a layer
*/
int msLayerGetNumFeatures(layerObj *layer)
{
if ( ! layer->vtable) {
int rv = msInitializeVirtualTable(layer);
if (rv != MS_SUCCESS)
return rv;
}
return layer->vtable->LayerGetNumFeatures(layer);
}
void
msLayerSetProcessingKey( layerObj *layer, const char *key, const char *value)
{
int len = strlen(key);
int i;
char *directive = NULL;
if( value != NULL ) {
directive = (char *) msSmallMalloc(strlen(key)+strlen(value)+2);
sprintf( directive, "%s=%s", key, value );
}
for( i = 0; i < layer->numprocessing; i++ ) {
if( strncasecmp( key, layer->processing[i], len ) == 0
&& layer->processing[i][len] == '=' ) {
free( layer->processing[i] );
/*
** Either replace the existing entry with a new one or
** clear the entry.
*/
if( directive != NULL )
layer->processing[i] = directive;
else {
layer->processing[i] = layer->processing[layer->numprocessing-1];
layer->processing[layer->numprocessing-1] = NULL;
layer->numprocessing--;
}
return;
}
}
/* otherwise add the directive at the end. */
if( directive != NULL ) {
msLayerAddProcessing( layer, directive );
free( directive );
}
}
void msLayerAddProcessing( layerObj *layer, const char *directive )
{
layer->numprocessing++;
if( layer->numprocessing == 1 )
layer->processing = (char **) msSmallMalloc(2*sizeof(char *));
else
layer->processing = (char **) msSmallRealloc(layer->processing, sizeof(char*) * (layer->numprocessing+1) );
layer->processing[layer->numprocessing-1] = msStrdup(directive);
layer->processing[layer->numprocessing] = NULL;
}
char *msLayerGetProcessing( layerObj *layer, int proc_index)
{
if (proc_index < 0 || proc_index >= layer->numprocessing) {
msSetError(MS_CHILDERR, "Invalid processing index.", "msLayerGetProcessing()");
return NULL;
} else {
return layer->processing[proc_index];
}
}
char *msLayerGetProcessingKey( layerObj *layer, const char *key )
{
int i, len = strlen(key);
for( i = 0; i < layer->numprocessing; i++ ) {
if( strncasecmp(layer->processing[i],key,len) == 0
&& layer->processing[i][len] == '=' )
return layer->processing[i] + len + 1;
}
return NULL;
}
/************************************************************************/
/* msLayerGetMaxFeaturesToDraw */
/* */
/* Check to see if maxfeaturestodraw is set as a metadata or an */
/* output format option. Used for vector layers to limit the */
/* number of fatures rendered. */
/************************************************************************/
int msLayerGetMaxFeaturesToDraw(layerObj *layer, outputFormatObj *format)
{
int nMaxFeatures = -1;
const char *pszTmp = NULL;
if (layer && format) {
pszTmp = msLookupHashTable(&layer->metadata, "maxfeaturestodraw");
if (pszTmp)
nMaxFeatures = atoi(pszTmp);
else {
pszTmp = msLookupHashTable(&layer->map->web.metadata, "maxfeaturestodraw");
if (pszTmp)
nMaxFeatures = atoi(pszTmp);
}
if (nMaxFeatures < 0)
nMaxFeatures = atoi(msGetOutputFormatOption( format, "maxfeaturestodraw", "-1"));
}
return nMaxFeatures;
}
int msLayerClearProcessing( layerObj *layer )
{
if (layer->numprocessing > 0) {
msFreeCharArray( layer->processing, layer->numprocessing );
layer->processing = NULL;
layer->numprocessing = 0;
}