spa/gemtext.c

#include <stdio.h>
#include <string.h>
#include "global.h"
#include "db.h"
#include "url.h"
#include <stdlib.h> //exit

extern sUrl base;   //the url being rendered

char* skip_to_ws(char* p){
  char c;
  while((c=*p))
    if((' '==c)||('\t'==c)||('\n'==c))
      break;
    else
      p++;
  return p;
}

char* skip_ws(char*p){
  char c;
  while((c=*p))
    if((' '==c)||('\t'==c)||('\n'==c))
      p++;
    else
      break;
  return p;
}

U32 url_length(char* url){
  char* end = skip_to_ws(url);
  return end-url;
}

char linebuf[4096];

/*******************************************************************************

render_link_line - Pull out the URL, normalize, and check with the db for the
                   sigil. Format line for display.

 ******************************************************************************/
void render_link_line(FILE*out,char*p){
  //  printf("[%s]\n",p);
  char* u = skip_ws(p+2);
  U32 ulen = url_length(u);
  
  sUrl url;
  
  
  if(url_is_full(u)){
    sUrl_set(&url,u,ulen);
    sUrl_full(&url);
  } else {
    sUrl_copy(&url,&base);
    sUrl_file(&url);
    //    printf("[r[%*.*s]r]",url_len,url_len,url_start);
    //printf("[b[%s]b]",base.buf);
    sUrl_rel(&url,u,ulen);
    //    printf("[[%s]]",url.buf);
  }
  // make a shortcut!
  //  printf("[[[%s]]]", url.buf);
  if(!sUrl_norm(&url)){
    // URL normalized OK.  Only spartan urls are databased.
    if(!(strncmp("spartan://",url.buf,10))) {
      char sigil[5];
      U32 idx = URL_idx(url.buf);
      idx_sigil(idx,sigil);
      //fprintf(out,"\033[33m%s\033[0m ",sigil);
      fprintf(out,"\033[33m%s\033[0m ",sigil);
      p = skip_ws(u+ulen);
      if(*p)
	fprintf(out,"\033[92m%s\033[0m",p);
      else {
	fprintf(out,"\033[92m%*.*s\033[0m\n",ulen,ulen,u);
      }
    } else { //non-spartan urls are printed as-is
      fprintf(out,"\033[95m???? %s\033[0m",u);
    }
  } else { //an attempt to manipulate a path
    fprintf(out,"\033[91mXXXX %s\033[0m",u);
  }  


}
/*******************************************************************************

render_head - Render a header line, # ## or ###

 ******************************************************************************/
void render_head(FILE* out, char*p){
  int level;
  char *q = p;
  for(level=0;*q=='#';q++,level++);
  switch(level){
  case 1: fprintf(out,"\033[93m");break;
  case 2: fprintf(out,"\033[94;1m");break;
  case 3: fprintf(out,"\033[94m");break;
  }
  fprintf(out,"%s\033[0m",p);
}
/*******************************************************************************

render_quote - Render a > quote line

 ******************************************************************************/
void render_quote(FILE* out,char*p){
  fprintf(out,"\033[36m%s\033[0m",p);
}
/*******************************************************************************
render_line - dispatch to a proper line handler.

*******************************************************************************/
/* 
Return 0 for normal, 1 for block-quote status.
*/
int render_line(FILE* out,char* p, int blockquote){
  int backquotes = !strncmp("```",p,3); 
  if(blockquote){
    if(backquotes)
      return 0;
    else{
      fputs(linebuf,out);
      return 1;
    }
  } else {
    if(backquotes)
      return 1;
    else {
      switch(*p){
      case '=':
	if('>'==*(p+1)){
	  render_link_line(out,p);
	  return 0;
	}
      case '#':
	render_head(out,p);
	return 0;
      case '>':
	render_quote(out,p);
	return 0;
      }
      fprintf(out,"%s",linebuf);
      return 0;
    }
  }
}

void render_file1(FILE* in,FILE* out){
  int bq = 0;
  while(fgets(linebuf,4096,in)) 
    bq=render_line(out,linebuf,bq  );
}
/*******************************************************************************
 
render_file - Render the entire in file to out file

 ******************************************************************************/

void render_file(FILE* in,FILE* out){
  int bq = 0; // tracking multiline-quote state
  while(fgets(linebuf,4096,in)) 
    bq=render_line(out,linebuf,bq  );
}