images.c++

/*
Access Gateway - a mediator for the World Wide Web

(C) 1998-2006 Silas S. Brown http://ssb22.user.srcf.net

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

*/

#ifndef ALLINC_H
#define ALLINC_H
#include "allinc.h"
#endif
// This "allinc.h" fragment is also in "notice.txt" (copied
// to top of every file on release), just in case forget to
// put it in some file
// Also, need to put this HERE (not in include file) for
// Monash:
#ifdef __GNUC__
#if (__GNUC__ > 2)
using namespace std;
#endif
#else
// Unknown compiler - assume it's standard
using namespace std;
#endif

// end of notice.txt
#include "allinc.h"
#include "images.h"
#include "instring.h"
#include "webget.h"
#include "ampersnd.h"
#include "debug.h"
#include <stdio.h>
#include <ctype.h>
#ifdef CAN_SHOW_IMAGES

#define HORRIBLE_1618_HACK // NEEDATTENTION
// This is if MULTIPLE_STYLES_SUPPORTED and it subtracts 2
// from the height for Korean style - to compensate
// for a quirk in the image server's data that needs fixing
// (only the Japanese is 16x18, everything else is 16x16).
// It's inadequate because the image server might change the
// style of a character if it's not available in the
// preferred style.  2001-07-13

/// Writes an IMG tag for the Unicode character c into InString dest
void addUnicodeCharacter(InString &dest,unsigned c,int doubleIt,const CGIEnvironment* theEnvironment) {
checkPoint();
char buf[9];
// UNICODE_URL is commented out, because we're now putting
// it as a BASE HREF
dest.addString("<IMG SRC=" /*UNICODE_URL*/);
#ifdef DEVELOPMENT_COPY
extern int dontProcessLinks;
if(dontProcessLinks) addUnicodeURL(dest,theEnvironment);
#endif
#ifdef UNICODE_SEPARATOR
sprintf(buf,"%02X",c>>8); dest.addString(buf);
dest.addString(UNICODE_SEPARATOR);
sprintf(buf,"%02X",c&0xFF); dest.addString(buf);
#else
sprintf(buf,"%04X",c); dest.addString(buf);
#endif
dest.addString(UNICODE_EXTENSION
#ifdef UNICODE_EXTRA_HTML
" " UNICODE_EXTRA_HTML
#endif
);
#ifdef UNICODE_HEIGHT
#if (defined(HORRIBLE_1618_HACK) && defined(MULTIPLE_STYLES_SUPPORTED))
int unicodeHeight=UNICODE_HEIGHT;
const char* style=theEnvironment->getStyle();
if(style && *style=='k') unicodeHeight-=2;
#else
#define unicodeHeight (UNICODE_HEIGHT)
#endif // HORRIBLE_1618_HACK etc
sprintf(buf,"%d",doubleIt?(unicodeHeight<<1):unicodeHeight);
dest.addString(" HEIGHT="); dest.addString(buf);
sprintf(buf,"%d",doubleIt?(UNICODE_WIDTH<<1):UNICODE_WIDTH);
dest.addString(" WIDTH="); dest.addString(buf);
#endif // UNICODE_HEIGHT
dest.addString(">");
}

void imageFilter(const char* sourceLine,InString &dest,int doubleIt,const CGIEnvironment* theEnvironment) {
checkPoint();
// sourceLine is just text, not tags etc
for(int i=0; sourceLine[i]; i++) {
if(sourceLine[i]=='&' && sourceLine[i+1]=='#') {
int oldI=i;
unsigned charVal=0; i+=2;
while(isdigit(sourceLine[i])) charVal=charVal*10+(sourceLine[i++]-'0');
if(sourceLine[i]==';') {
addUnicodeCharacter(dest,charVal,doubleIt,theEnvironment);
continue;
} else i=oldI; // and carry on
} dest.addCharacter(sourceLine[i]);
}
}

// Let's have a nasty global...
ShowCharsAs subHtmlShowCharsAs=CharsIMG;
#endif