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plan9fox/sys/src/cmd/mothra/rdhtml.c

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#include <u.h>
#include <libc.h>
#include <draw.h>
#include <event.h>
#include <panel.h>
#include "mothra.h"
#include "html.h"
#include "rtext.h"
typedef struct Fontdata Fontdata;
struct Fontdata{
char *name;
Font *font;
int space;
}fontlist[4][4]={
"dejavusans/unicode.12", 0, 0,
"dejavusans/unicode.12", 0, 0,
"dejavusans/unicode.14", 0, 0,
"dejavusans/unicode.16", 0, 0,
"dejavusansit/unicode.12", 0, 0,
"dejavusansit/unicode.12", 0, 0,
"dejavusansit/unicode.14", 0, 0,
"dejavusansit/unicode.16", 0, 0,
"dejavusansbd/unicode.12", 0, 0,
"dejavusansbd/unicode.12", 0, 0,
"dejavusansbd/unicode.14", 0, 0,
"dejavusansbd/unicode.16", 0, 0,
"terminus/unicode.12", 0, 0,
"terminus/unicode.14", 0, 0,
"terminus/unicode.16", 0, 0,
"terminus/unicode.18", 0, 0,
};
Fontdata *pl_whichfont(int f, int s){
char name[NNAME];
assert(f >= 0 && f < 4);
assert(s >= 0 && s < 4);
if(fontlist[f][s].font==0){
snprint(name, sizeof(name), "/lib/font/bit/%s.font", fontlist[f][s].name);
fontlist[f][s].font=openfont(display, name);
if(fontlist[f][s].font==0) fontlist[f][s].font=font;
fontlist[f][s].space=stringwidth(fontlist[f][s].font, "0");
}
return &fontlist[f][s];
}
void getfonts(void){
int f, s;
for(f=0;f!=4;f++)
for(s=0;s!=4;s++)
pl_whichfont(f, s);
}
void pl_pushstate(Hglob *g, int t){
++g->state;
if(g->state==&g->stack[NSTACK]){
htmlerror(g->name, g->lineno, "stack overflow at <%s>", tag[t].name);
--g->state;
}
g->state[0]=g->state[-1];
g->state->tag=t;
}
void pl_linespace(Hglob *g){
plrtbitmap(&g->dst->text, 1000000, 0, linespace, 0, 0);
g->para=0;
g->linebrk=0;
}
enum{
HORIZ,
VERT,
};
int strtolength(Hglob *g, int dir, char *str){
double f;
Point p;
f = atof(str);
if(cistrstr(str, "%"))
return 0;
if(cistrstr(str, "em")){
p=stringsize(pl_whichfont(g->state->font, g->state->size)->font, "M");
return floor(f*((dir==HORIZ) ? p.x : p.y));
}
return floor(f);
}
void pl_htmloutput(Hglob *g, int nsp, char *s, Field *field){
Fontdata *f;
int space, indent;
Action *ap;
if(g->state->tag==Tag_title
/* || g->state->tag==Tag_textarea */
|| g->state->tag==Tag_select){
if(s){
if(g->tp!=g->text && g->tp!=g->etext && g->tp[-1]!=' ')
*g->tp++=' ';
while(g->tp!=g->etext && *s) *g->tp++=*s++;
if(g->state->tag==Tag_title) g->dst->changed=1;
*g->tp='\0';
}
return;
}
f=pl_whichfont(g->state->font, g->state->size);
space=f->space;
indent=g->state->margin;
if(g->para){
space=1000000;
indent+=g->state->indent;
}
else if(g->linebrk)
space=1000000;
else if(nsp<=0)
space=0;
if(g->state->image[0]==0 && g->state->link[0]==0 && g->state->name[0]==0 && field==0)
ap=0;
else{
ap=emalloc(sizeof(Action));
if(g->state->image[0])
ap->image = strdup(g->state->image);
if(g->state->link[0])
ap->link = strdup(g->state->link);
if(g->state->name[0])
ap->name = strdup(g->state->name);
ap->ismap=g->state->ismap;
ap->width=g->state->width;
ap->height=g->state->height;
ap->field=field;
}
if(space<0) space=0;
if(indent<0) indent=0;
if(g->state->pre && s[0]=='\t'){
space=0;
while(s[0]=='\t'){
space++;
s++;
}
space=PL_TAB|space;
if(g->linebrk){
indent=space;
space=1000000;
}
}
plrtstr(&g->dst->text, space, indent, f->font, strdup(s),
g->state->link[0] ? PL_HOT : 0, ap);
g->para=0;
g->linebrk=0;
g->dst->changed=1;
}
/*
* Buffered read, no translation
* Save in cache.
*/
int pl_bread(Hglob *g){
int n, c;
char err[1024];
if(g->hbufp==g->ehbuf){
n=read(g->hfd, g->hbuf, NHBUF);
if(n<=0){
if(n<0){
snprint(err, sizeof(err), "%r reading %s", g->name);
pl_htmloutput(g, 1, err, 0);
}
g->heof=1;
return EOF;
}
g->hbufp=g->hbuf;
g->ehbuf=g->hbuf+n;
}
c=*g->hbufp++&255;
if(c=='\n') g->lineno++;
return c;
}
/*
* Read a character, translating \r\n, \n\r, \r and \n into \n
*/
int pl_readc(Hglob *g){
int c;
static int peek=-1;
if(peek!=-1){
c=peek;
peek=-1;
}
else
c=pl_bread(g);
if(c=='\r'){
c=pl_bread(g);
if(c!='\n') peek=c;
return '\n';
}
if(c=='\n'){
c=pl_bread(g);
if(c!='\r') peek=c;
return '\n';
}
return c;
}
void pl_putback(Hglob *g, int c){
if(g->npeekc==NPEEKC) htmlerror(g->name, g->lineno, "too much putback!");
else if(c!=EOF) g->peekc[g->npeekc++]=c;
}
int pl_nextc(Hglob *g){
int c;
int n;
Rune r;
char crune[UTFmax+1];
if(g->heof) return EOF;
if(g->npeekc!=0) return g->peekc[--g->npeekc];
c=pl_readc(g);
if(c=='<'){
c=pl_readc(g);
if(c=='/'){
c=pl_readc(g);
pl_putback(g, c);
pl_putback(g, '/');
if('a'<=c && c<='z' || 'A'<=c && c<='Z') return STAG;
return '<';
}
pl_putback(g, c);
if(c=='!' || 'a'<=c && c<='z' || 'A'<=c && c<='Z' || c=='?') return STAG;
return '<';
}
if(c=='>') return ETAG;
if(c==EOF) return c;
for (n=1; n<=sizeof(crune); n++){
crune[n-1]=c;
if(fullrune(crune, n)){
chartorune(&r, crune);
return r;
}
c=pl_readc(g);
if(c==EOF)
return EOF;
}
return c;
}
char *unquot(char *dst, char *src, int len){
char *e;
e=0;
while(*src && strchr(" \t\r\n", *src))
src++;
if(*src=='\'' || *src=='"'){
e=strrchr(src+1, *src);
src++;
}
if(e==0) e=strchr(src, 0);
len--;
if((e - src) < len)
len=e-src;
if(len>0) memmove(dst, src, len);
dst[len]=0;
return dst;
}
int alnumchar(int c){
return 'a'<=c && c<='z' || 'A'<=c && c<='Z' || '0'<=c && c<='9';
}
int entchar(int c){
return c=='#' || alnumchar(c);
}
/* return url if text token looks like a hyperlink */
char *linkify(char *s){
if(s == 0 && s[0] == 0)
return 0;
if(!cistrncmp(s, "http://", 7))
return strdup(s);
if(!cistrncmp(s, "https://", 8))
return strdup(s);
if(!cistrncmp(s, "www.", 4)){
int d, i;
d = 1;
for(i=4; s[i]; i++){
if(s[i] == '.'){
if(s[i-1] == '.')
return 0;
d++;
} else if(!alnumchar(s[i]))
break;
}
if(d >= 2)
return smprint("http://%s", s);
}
return 0;
}
/*
* remove entity references, in place.
* Potential bug:
* This doesn't work if removing an entity reference can lengthen the string!
* Fortunately, this doesn't happen.
*/
void pl_rmentities(Hglob *g, char *s){
char *t, *u, c, svc;
Entity *ep;
Rune r;
t=s;
do{
c=*s++;
if(c=='&'
&& ((*s=='#' && strchr("0123456789Xx", s[1]))
|| 'a'<=*s && *s<='z'
|| 'A'<=*s && *s<='Z')){
u=s;
while(entchar(*s)) s++;
svc=*s;
*s = 0;
if(svc==';') s++;
if(strcmp(u, "lt") == 0)
*t++='<';
else if(strcmp(u, "gt") == 0)
*t++='>';
else if(strcmp(u, "quot") == 0)
*t++='"';
else if(strcmp(u, "apos") == 0)
*t++='\'';
else if(strcmp(u, "amp") == 0)
*t++='&';
else {
if(svc==';') s--;
*s=svc;
*t++='&';
while(u<s)
*t++=*u++;
}
}
else *t++=c;
}while(c);
}
/*
* Skip over white space
*/
char *pl_white(char *s){
while(*s==' ' || *s=='\t' || *s=='\n' || *s=='\r') s++;
return s;
}
/*
* Skip over HTML word
*/
char *pl_word(char *s){
if ('a'<=*s && *s<='z' || 'A'<=*s && *s<='Z') {
s++;
while('a'<=*s && *s<='z' || 'A'<=*s && *s<='Z' || '0'<=*s && *s<='9' ||
*s=='-' || *s=='.' || *s==':') s++;
}
return s;
}
/*
* Skip to matching quote
*/
char *pl_quote(char *s){
char q;
q=*s++;
while(*s!=q && *s!='\0') s++;
return s;
}
void pl_dnl(char *s){
char *t;
for(t=s;*s;s++) if(*s!='\r' && *s!='\n') *t++=*s;
*t='\0';
}
void pl_tagparse(Hglob *g, char *str){
char *s, *t, *name, c;
Pair *ap;
Tag *tagp;
g->tag=Tag_end;
ap=g->attr;
if(str[0]=='!'){ /* test should be strncmp(str, "!--", 3)==0 */
g->tag=Tag_comment;
ap->name=0;
return;
}
if(str[0]=='/') str++;
name=str;
s=pl_word(str);
if(*s!='/' && *s!=' ' && *s!='\n' && *s!='\t' && *s!='\0'){
htmlerror(g->name, g->lineno, "bad tag name in %s", str);
ap->name=0;
return;
}
if(*s!='\0') *s++='\0';
for(t=name;t!=s;t++) if('A'<=*t && *t<='Z') *t+='a'-'A';
/*
* Binary search would be faster here
*/
for(tagp=tag;tagp->name;tagp++) if(strcmp(name, tagp->name)==0) break;
g->tag=tagp-tag;
if(g->tag==Tag_end) htmlerror(g->name, g->lineno, "no tag %s", name);
for(;;){
s=pl_white(s);
if(*s=='\0'){
ap->name=0;
return;
}
ap->name=s;
s=pl_word(s);
t=pl_white(s);
c=*t;
*s='\0';
for(s=ap->name;*s;s++) if('A'<=*s && *s<='Z') *s+='a'-'A';
if(c=='='){
s=pl_white(t+1);
if(*s=='\'' || *s=='"'){
ap->value=s+1;
s=pl_quote(s);
if(*s=='\0'){
htmlerror(g->name, g->lineno,
"No terminating quote in rhs of attribute %s",
ap->name);
ap->name=0;
return;
}
*s++='\0';
pl_dnl(ap->value);
}
else{
/* read up to white space or > */
ap->value=s;
while(*s!=' ' && *s!='\t' && *s!='\n' && *s!='\0') s++;
if(*s!='\0') *s++='\0';
}
pl_rmentities(g, ap->value);
}
else{
if(c!='\0') s++;
ap->value="";
}
if(ap==&g->attr[NATTR-1])
htmlerror(g->name, g->lineno, "too many attributes!");
else ap++;
}
}
int pl_getcomment(Hglob *g){
int c;
if((c=pl_nextc(g))=='-' && (c=pl_nextc(g))=='-'){
/* <!-- eats everything until --> or EOF */
for(;;){
while((c=pl_nextc(g))!='-' && c!=EOF)
;
if(c==EOF)
break;
if((c=pl_nextc(g))=='-'){
while((c=pl_nextc(g))=='-')
;
if(c==ETAG || c==EOF)
break;
}
}
} else {
/* <! eats everything until > or EOF */
while(c!=ETAG && c!=EOF)
c=pl_nextc(g);
}
if(c==EOF)
htmlerror(g->name, g->lineno, "EOF in comment");
g->tag=Tag_comment;
g->attr->name=0;
g->token[0]='\0';
return TAG;
}
int lrunetochar(char *p, int v)
{
Rune r;
r=v;
return runetochar(p, &r);
}
int pl_getscript(Hglob *g){
char *tokp, *t;
int c;
tokp = g->token;
*tokp++ = '<';
while((c=pl_nextc(g)) != EOF){
if(c==STAG || c==' ' || c=='\t' || c=='\n'){
pl_putback(g, c);
break;
}
if(c==ETAG) c='>';
tokp += lrunetochar(tokp, c);
if(c==0 || c=='>' || tokp >= &g->token[NTOKEN-UTFmax-1])
break;
}
*tokp = '\0';
t = tag[g->state->tag].name;
if(g->token[1] == '/' && cistrncmp(g->token+2, t, strlen(t)) == 0){
g->tag=g->state->tag;
g->attr->name=0;
return ENDTAG;
}
pl_rmentities(g, g->token);
g->nsp=g->spacc;
g->spacc=0;
return TEXT;
}
/*
* Read a start or end tag -- the caller has read the initial <
*/
int pl_gettag(Hglob *g){
char *tokp;
int c, q;
if(g->state->isscript)
return pl_getscript(g);
if((c=pl_nextc(g))=='!' || c=='?')
return pl_getcomment(g);
pl_putback(g, c);
q = 0;
tokp=g->token;
while((c=pl_nextc(g))!=EOF){
if(c == '=' && q == 0)
q = '=';
else if(c == '\'' || c == '"'){
if(q == '=')
q = c;
else if(q == c)
q = 0;
}
else if(c == ETAG && q != '\'' && q != '"')
break;
else if(q == '=' && c != ' ' && c != '\t' && c != '\n')
q = 0;
if(tokp < &g->token[NTOKEN-UTFmax-1])
tokp += lrunetochar(tokp, c);
}
*tokp='\0';
if(c==EOF) htmlerror(g->name, g->lineno, "EOF in tag");
pl_tagparse(g, g->token);
if(g->token[0]!='/') return TAG;
if(g->attr[0].name!=0)
htmlerror(g->name, g->lineno, "end tag should not have attributes");
return ENDTAG;
}
/*
* The next token is a tag, an end tag or a sequence of
* non-white characters.
* If inside <pre>, newlines are converted to <br> and spaces are preserved.
* Otherwise, spaces and newlines are noted and discarded.
*/
int pl_gettoken(Hglob *g){
char *tokp;
int c;
if(g->state->pre) switch(c=pl_nextc(g)){
case STAG: return pl_gettag(g);
case EOF: return EOF;
case '\n':
pl_tagparse(g, "br");
return TAG;
default:
tokp=g->token;
while(c=='\t'){
if(tokp < &g->token[NTOKEN-UTFmax-1]) tokp += lrunetochar(tokp, c);
c=pl_nextc(g);
}
while(c!='\t' && c!='\n' && c!=STAG && c!=EOF){
if(c==ETAG) c='>';
if(tokp < &g->token[NTOKEN-UTFmax-1]) tokp += lrunetochar(tokp, c);
c=pl_nextc(g);
}
*tokp='\0';
pl_rmentities(g, g->token);
pl_putback(g, c);
g->nsp=0;
g->spacc=0;
return TEXT;
}
while((c=pl_nextc(g))==' ' || c=='\t' || c=='\n')
if(g->spacc!=-1)
g->spacc++;
switch(c){
case STAG: return pl_gettag(g);
case EOF: return EOF;
default:
tokp=g->token;
do{
if(c==ETAG) c='>';
if(tokp < &g->token[NTOKEN-UTFmax-1]) tokp += lrunetochar(tokp, c);
c=pl_nextc(g);
}while(c!=' ' && c!='\t' && c!='\n' && c!=STAG && c!=EOF);
*tokp='\0';
pl_rmentities(g, g->token);
pl_putback(g, c);
g->nsp=g->spacc;
g->spacc=0;
return TEXT;
}
}
char *pl_getattr(Pair *attr, char *name){
for(;attr->name;attr++)
if(strcmp(attr->name, name)==0)
return attr->value;
return 0;
}
int pl_hasattr(Pair *attr, char *name){
for(;attr->name;attr++)
if(strcmp(attr->name, name)==0)
return 1;
return 0;
}
void plaintext(Hglob *g){
char line[NLINE];
char *lp, *elp;
int c;
g->state->font=CWIDTH;
g->state->size=NORMAL;
elp=&line[NLINE-UTFmax-1];
lp=line;
for(;;){
c=pl_readc(g);
if(c==EOF) break;
if(c=='\n' || lp>=elp){
*lp='\0';
g->linebrk=1;
pl_htmloutput(g, 0, line, 0);
lp=line;
}
if(c=='\t'){
do *lp++=' '; while(lp<elp && utfnlen(line, lp-line)%8!=0);
}
else if(c!='\n')
lp += lrunetochar(lp, c);
}
if(lp!=line){
*lp='\0';
g->linebrk=1;
pl_htmloutput(g, 0, line, 0);
}
}
void plrdplain(char *name, int fd, Www *dst){
Hglob g;
g.state=g.stack;
g.state->tag=Tag_html;
g.state->font=CWIDTH;
g.state->size=NORMAL;
g.state->pre=0;
g.state->image[0]=0;
g.state->link[0]=0;
g.state->name[0]=0;
g.state->margin=0;
g.state->indent=20;
g.state->ismap=0;
g.dst=dst;
g.hfd=fd;
g.name=name;
g.ehbuf=g.hbufp=g.hbuf;
g.npeekc=0;
g.heof=0;
g.lineno=1;
g.linebrk=1;
g.para=0;
g.text=dst->title;
g.tp=g.text;
g.etext=g.text+NTITLE-1;
g.spacc=0;
g.form=0;
nstrcpy(g.text, name, NTITLE);
plaintext(&g);
finish(dst);
}
void plrdhtml(char *name, int fd, Www *dst){
int t, tagerr;
Stack *sp;
char buf[20];
char *str;
Hglob g;
g.state=g.stack;
g.state->tag=Tag_html;
g.state->font=ROMAN;
g.state->size=NORMAL;
g.state->pre=0;
g.state->image[0]=0;
g.state->link[0]=0;
g.state->name[0]=0;
g.state->margin=0;
g.state->indent=25;
g.state->ismap=0;
g.state->isscript=0;
g.state->width=0;
g.state->height=0;
g.dst=dst;
g.hfd=fd;
g.name=name;
g.ehbuf=g.hbufp=g.hbuf;
g.npeekc=0;
g.heof=0;
g.lineno=1;
g.linebrk=1;
g.para=0;
g.text=dst->title;
g.tp=g.text;
g.etext=g.text+NTITLE-1;
dst->title[0]='\0';
g.spacc=0;
g.form=0;
for(;;) switch(pl_gettoken(&g)){
case TAG:
switch(tag[g.tag].action){
case OPTEND:
for(sp=g.state;sp!=g.stack && sp->tag!=g.tag;--sp);
if(sp->tag!=g.tag)
pl_pushstate(&g, g.tag);
else
for(;g.state!=sp;--g.state)
if(tag[g.state->tag].action!=OPTEND)
htmlerror(g.name, g.lineno,
"end tag </%s> missing",
tag[g.state->tag].name);
break;
case END:
pl_pushstate(&g, g.tag);
break;
}
if(str=pl_getattr(g.attr, "id")){
char swap[NNAME];
nstrcpy(swap, g.state->name, sizeof(swap));
nstrcpy(g.state->name, str, sizeof(g.state->name));
pl_htmloutput(&g, 0, "", 0);
nstrcpy(g.state->name, swap, sizeof(g.state->name));
}
switch(g.tag){
default:
htmlerror(g.name, g.lineno,
"unimplemented tag <%s>", tag[g.tag].name);
break;
case Tag_end: /* unrecognized start tag */
break;
case Tag_img:
if(str=pl_getattr(g.attr, "src"))
nstrcpy(g.state->image, str, sizeof(g.state->image));
else {
Pair *a;
/*
* hack to emulate javascript that rewrites some attribute
* into src= after page got loaded. just look for some
* attribute that looks like a url.
*/
for(a = g.attr; a->name; a++){
if(strcmp(a->name, "longdesc") == 0)
continue;
if(str = linkify(a->value)){
nstrcpy(g.state->image, str, sizeof(g.state->image));
free(str);
break;
}
}
}
g.state->ismap=pl_hasattr(g.attr, "ismap");
if(str=pl_getattr(g.attr, "width"))
g.state->width=strtolength(&g, HORIZ, str);
if(str=pl_getattr(g.attr, "height"))
g.state->height=strtolength(&g, VERT, str);
str=pl_getattr(g.attr, "alt");
if(str==0){
if(g.state->image[0])
str=g.state->image;
else
str="[[image]]";
}
pl_htmloutput(&g, 0, str, 0);
g.state->image[0]=0;
g.state->ismap=0;
g.state->width=0;
g.state->height=0;
break;
case Tag_plaintext:
g.spacc=0;
plaintext(&g);
break;
case Tag_comment:
case Tag_html:
case Tag_link:
case Tag_nextid:
case Tag_table:
break;
case Tag_tr:
g.spacc=0;
g.linebrk=1;
break;
case Tag_td:
g.spacc++;
break;
case Tag_base:
if(str=pl_getattr(g.attr, "href")){
seturl(g.dst->url, str, g.dst->url->fullname);
nstrcpy(g.dst->url->fullname, str, sizeof(g.dst->url->fullname));
/* base should be a full url, but it often isnt so have to resolve */
urlresolve(g.dst->url);
}
break;
case Tag_a:
if(str=pl_getattr(g.attr, "name"))
nstrcpy(g.state->name, str, sizeof(g.state->name));
pl_htmloutput(&g, 0, "", 0);
if(str=pl_getattr(g.attr, "href"))
nstrcpy(g.state->link, str, sizeof(g.state->link));
break;
case Tag_meta:
if((str=pl_getattr(g.attr, "http-equiv"))==0)
break;
if(cistrcmp(str, "refresh"))
break;
if((str=pl_getattr(g.attr, "content"))==0)
break;
if((str=strchr(str, '='))==0)
break;
str++;
pl_htmloutput(&g, 0, "[refresh: ", 0);
str=unquot(g.state->link, str, sizeof(g.state->link));
pl_htmloutput(&g, 0, str, 0);
g.state->link[0]=0;
pl_htmloutput(&g, 0, "]", 0);
g.linebrk=1;
g.spacc=0;
break;
case Tag_source:
case Tag_video:
case Tag_audio:
case Tag_embed:
case Tag_frame:
case Tag_iframe:
snprint(buf, sizeof(buf), "[%s: ", tag[g.tag].name);
pl_htmloutput(&g, 0, buf, 0);
if(str=pl_getattr(g.attr, "src"))
nstrcpy(g.state->link, str, sizeof(g.state->link));
if(str=pl_getattr(g.attr, "name"))
nstrcpy(g.state->name, str, sizeof(g.state->name));
else
str = g.state->link;
pl_htmloutput(&g, 0, str, 0);
g.state->link[0]=0;
g.state->name[0]=0;
pl_htmloutput(&g, 0, "]", 0);
g.linebrk=1;
g.spacc=0;
break;
case Tag_address:
g.spacc=0;
g.linebrk=1;
g.state->font=ROMAN;
g.state->size=NORMAL;
g.state->margin=300;
g.state->indent=50;
break;
case Tag_b:
case Tag_strong:
g.state->font=BOLD;
break;
case Tag_blockquot:
g.spacc=0;
g.linebrk=1;
g.state->margin+=50;
g.state->indent=20;
break;
case Tag_body:
break;
case Tag_head:
g.state->font=ROMAN;
g.state->size=NORMAL;
g.state->margin=0;
g.state->indent=20;
g.spacc=0;
break;
case Tag_div:
case Tag_br:
g.spacc=0;
g.linebrk=1;
break;
case Tag_span:
case Tag_center:
/* more to come */
break;
case Tag_cite:
case Tag_acronym:
g.state->font=ITALIC;
g.state->size=NORMAL;
break;
case Tag_code:
g.state->font=CWIDTH;
g.state->size=NORMAL;
break;
case Tag_dd:
g.linebrk=1;
g.state->indent=0;
g.state->font=ROMAN;
g.spacc=0;
break;
case Tag_dfn:
htmlerror(g.name, g.lineno, "<dfn> deprecated");
case Tag_abbr:
g.state->font=BOLD;
g.state->size=NORMAL;
break;
case Tag_dl:
g.state->font=BOLD;
g.state->size=NORMAL;
g.state->margin+=40;
g.spacc=0;
break;
case Tag_dt:
g.para=1;
g.state->indent=-40;
g.state->font=BOLD;
g.spacc=0;
break;
case Tag_font:
/* more to come */
break;
case Tag_u:
htmlerror(g.name, g.lineno, "<u> deprecated");
case Tag_em:
case Tag_i:
case Tag_var:
g.state->font=ITALIC;
break;
case Tag_h1:
g.linebrk=1;
g.state->font=BOLD;
g.state->size=ENORMOUS;
g.state->margin+=100;
g.spacc=0;
break;
case Tag_h2:
pl_linespace(&g);
g.state->font=BOLD;
g.state->size=ENORMOUS;
g.spacc=0;
break;
case Tag_h3:
g.linebrk=1;
pl_linespace(&g);
g.state->font=ITALIC;
g.state->size=ENORMOUS;
g.state->margin+=20;
g.spacc=0;
break;
case Tag_h4:
pl_linespace(&g);
g.state->font=BOLD;
g.state->size=LARGE;
g.state->margin+=10;
g.spacc=0;
break;
case Tag_h5:
pl_linespace(&g);
g.state->font=ITALIC;
g.state->size=LARGE;
g.state->margin+=10;
g.spacc=0;
break;
case Tag_h6:
pl_linespace(&g);
g.state->font=BOLD;
g.state->size=LARGE;
g.spacc=0;
break;
case Tag_hr:
g.spacc=0;
plrtbitmap(&g.dst->text, 1000000, g.state->margin, hrule, 0, 0);
break;
case Tag_key:
htmlerror(g.name, g.lineno, "<key> deprecated");
case Tag_kbd:
g.state->font=CWIDTH;
break;
case Tag_dir:
case Tag_menu:
case Tag_ol:
case Tag_ul:
g.state->number=0;
g.linebrk=1;
g.state->margin+=25;
g.state->indent=-25;
g.spacc=0;
break;
case Tag_li:
g.spacc=0;
switch(g.state->tag){
default:
htmlerror(g.name, g.lineno, "can't have <li> in <%s>",
tag[g.state->tag].name);
case Tag_dir: /* supposed to be multi-columns, can't do! */
case Tag_menu:
g.linebrk=1;
break;
case Tag_ol:
g.para=1;
snprint(buf, sizeof(buf), "%2d ", ++g.state->number);
pl_htmloutput(&g, 0, buf, 0);
break;
case Tag_ul:
g.para=0;
g.linebrk=0;
g.spacc=-1;
plrtbitmap(&g.dst->text, 100000,
g.state->margin+g.state->indent, bullet, 0, 0);
break;
}
break;
case Tag_p:
pl_linespace(&g);
g.linebrk=1;
g.spacc=0;
break;
case Tag_listing:
case Tag_xmp:
htmlerror(g.name, g.lineno, "<%s> deprecated", tag[g.tag].name);
case Tag_pre:
case Tag_samp:
g.state->indent=0;
g.state->pre=1;
g.state->font=CWIDTH;
g.state->size=NORMAL;
pl_linespace(&g);
break;
case Tag_tt:
g.state->font=CWIDTH;
g.state->size=NORMAL;
break;
case Tag_title:
g.text=dst->title+strlen(dst->title);
g.tp=g.text;
g.etext=dst->title+NTITLE-1;
break;
case Tag_form:
case Tag_input:
case Tag_button:
case Tag_select:
case Tag_option:
case Tag_textarea:
case Tag_isindex:
rdform(&g);
break;
case Tag_script:
case Tag_style:
g.state->isscript=1;
break;
}
break;
case ENDTAG:
/*
* If the end tag doesn't match the top, we try to uncover a match
* on the stack.
*/
if(g.state->tag!=g.tag){
tagerr=0;
for(sp=g.state;sp!=g.stack;--sp){
if(sp->tag==g.tag)
break;
if(tag[g.state->tag].action!=OPTEND) tagerr++;
}
if(sp==g.stack){
if(tagerr)
htmlerror(g.name, g.lineno,
"end tag mismatch <%s>...</%s>, ignored",
tag[g.state->tag].name, tag[g.tag].name);
}
else{
if(tagerr)
htmlerror(g.name, g.lineno,
"end tag mismatch <%s>...</%s>, "
"intervening tags popped",
tag[g.state->tag].name, tag[g.tag].name);
g.state=sp-1;
}
}
else if(g.state==g.stack)
htmlerror(g.name, g.lineno, "end tag </%s> at stack bottom",
tag[g.tag].name);
else
--g.state;
switch(g.tag){
case Tag_select:
case Tag_form:
case Tag_textarea:
endform(&g);
break;
case Tag_h1:
case Tag_h2:
case Tag_h3:
case Tag_h4:
pl_linespace(&g);
break;
case Tag_div:
case Tag_address:
case Tag_blockquot:
case Tag_body:
case Tag_dir:
case Tag_dl:
case Tag_dt:
case Tag_h5:
case Tag_h6:
case Tag_listing:
case Tag_menu:
case Tag_ol:
case Tag_samp:
case Tag_title:
case Tag_ul:
case Tag_xmp:
case Tag_table:
g.linebrk=1;
break;
case Tag_pre:
pl_linespace(&g);
break;
}
break;
case TEXT:
if(g.state->isscript)
continue;
if(g.state->link[0]==0 && (str = linkify(g.token))){
nstrcpy(g.state->link, str, sizeof(g.state->link));
pl_htmloutput(&g, g.nsp, g.token, 0);
g.state->link[0] = 0;
free(str);
} else
pl_htmloutput(&g, g.nsp, g.token, 0);
break;
case EOF:
for(;g.state!=g.stack;--g.state)
if(tag[g.state->tag].action!=OPTEND)
htmlerror(g.name, g.lineno,
"missing </%s> at EOF", tag[g.state->tag].name);
*g.tp='\0';
getpix(dst->text, dst);
finish(dst);
return;
}
}
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