Function processExtentTag

maptemplate.c:1336–1496

** Function process any number of MapServer extent tags (e.g. shpext, mapext, etc...). */

** Function process any number of MapServer extent tags (e.g. shpext, mapext, etc...).
*/
static int processExtentTag(mapservObj *mapserv, char **line, char *name, rectObj *extent, projectionObj *rectProj)
{
  char *argValue;

  char *tag, *tagStart, *tagEnd;
  hashTableObj *tagArgs=NULL;
  int tagOffset, tagLength;

  char *encodedTagValue=NULL, *tagValue=NULL;

  rectObj tempExtent;
  double xExpand, yExpand;

  char number[64]; /* holds a single number in the extent */
  char numberFormat[16];
  char *format;

  int precision;
  int escape;

  char *projectionString=NULL;

  if(!*line) {
    msSetError(MS_WEBERR, "Invalid line pointer.", "processExtentTag()");
    return(MS_FAILURE);
  }

  tagStart = findTag(*line, name); /* this supports any extent */

  /* It is OK to have no include tags, just return. */
  if(!tagStart) return MS_SUCCESS;

  /* hack to handle tags like 'mapext_esc' easily */
  if(strstr(name, "_esc")) escape = ESCAPE_URL;

  while(tagStart) {
    xExpand = yExpand = 0; /* set tag argument defaults */
    precision = -1;
    format = "$minx $miny $maxx $maxy";
    if(strstr(name, "_esc"))
      escape = ESCAPE_URL;
    else
      escape = ESCAPE_HTML;
    projectionString = NULL;

    tagOffset = tagStart - *line;

     /* check for any tag arguments */
    if(getTagArgs(name, tagStart, &tagArgs) != MS_SUCCESS) return(MS_FAILURE);
    if(tagArgs) {
      argValue = msLookupHashTable(tagArgs, "expand");
      if(argValue) {
        if(strchr(argValue, '%') != NULL) {
          float f;
          sscanf(argValue, "%f%%", &f);
          xExpand = ((f/100.0)*(extent->maxx-extent->minx))/2;
          yExpand = ((f/100.0)*(extent->maxy-extent->miny))/2;          
        } else {