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236
src/cmd/page/page.c
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236
src/cmd/page/page.c
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#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <event.h>
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#include <bio.h>
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#include "page.h"
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int resizing;
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int mknewwindow;
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int doabort;
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int chatty;
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int reverse = -1;
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int goodps = 1;
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int ppi = 100;
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int teegs = 0;
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int truetoboundingbox;
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int textbits=4, gfxbits=4;
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int wctlfd = -1;
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int stdinfd;
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int truecolor;
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int imagemode;
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int notewatcher;
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int notegp;
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int
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watcher(void *v, char *x)
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{
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USED(v);
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if(strcmp(x, "die") != 0)
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postnote(PNGROUP, notegp, x);
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_exits(0);
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return 0;
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}
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int
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bell(void *u, char *x)
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{
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if(x && strcmp(x, "hangup") == 0)
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_exits(0);
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if(x && strstr(x, "die") == nil)
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fprint(2, "postnote %d: %s\n", getpid(), x);
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/* alarms come from the gs monitor */
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if(x && strstr(x, "alarm")){
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postnote(PNGROUP, getpid(), "die (gs error)");
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postnote(PNPROC, notewatcher, "die (gs error)");
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}
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/* function mentions u so that it's in the stack trace */
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if((u == nil || u != x) && doabort)
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abort();
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/* fprint(2, "exiting %d\n", getpid()); */
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wexits("note");
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return 0;
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}
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static int
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afmt(Fmt *fmt)
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{
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char *s;
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s = va_arg(fmt->args, char*);
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if(s == nil || s[0] == '\0')
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return fmtstrcpy(fmt, "");
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else
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return fmtprint(fmt, "%#q", s);
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}
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void
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usage(void)
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{
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fprint(2, "usage: page [-biRrw] [-p ppi] file...\n");
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exits("usage");
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}
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void
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main(int argc, char **argv)
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{
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Document *doc;
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Biobuf *b;
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enum { Ninput = 16 };
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uchar buf[Ninput+1];
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int readstdin;
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ARGBEGIN{
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/* "temporary" debugging options */
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case 'P':
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goodps = 0;
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break;
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case 'v':
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chatty++;
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break;
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case 'V':
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teegs++;
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break;
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case 'a':
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doabort++;
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break;
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case 'T':
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textbits = atoi(EARGF(usage()));
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gfxbits = atoi(EARGF(usage()));
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break;
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/* real options */
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case 'R':
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resizing = 1;
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break;
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case 'r':
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reverse = 1;
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break;
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case 'p':
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ppi = atoi(EARGF(usage()));
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break;
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case 'b':
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truetoboundingbox = 1;
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break;
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case 'w':
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mknewwindow = 1;
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resizing = 1;
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break;
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case 'i':
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imagemode = 1;
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break;
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default:
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usage();
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}ARGEND;
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notegp = getpid();
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switch(notewatcher = fork()){
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case -1:
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sysfatal("fork\n");
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exits(0);
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default:
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break;
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case 0:
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atnotify(watcher, 1);
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for(;;)
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sleep(1000);
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_exits(0);
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}
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rfork(RFNOTEG);
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atnotify(bell, 1);
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readstdin = 0;
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if(imagemode == 0 && argc == 0){
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readstdin = 1;
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stdinfd = dup(0, -1);
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close(0);
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open("/dev/cons", OREAD);
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}
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quotefmtinstall();
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fmtinstall('a', afmt);
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fmtinstall('R', Rfmt);
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fmtinstall('P', Pfmt);
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if(readstdin){
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b = nil;
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if(readn(stdinfd, buf, Ninput) != Ninput){
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fprint(2, "page: short read reading %s\n", argv[0]);
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wexits("read");
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}
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}else if(argc != 0){
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if(!(b = Bopen(argv[0], OREAD))) {
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fprint(2, "page: cannot open \"%s\"\n", argv[0]);
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wexits("open");
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}
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if(Bread(b, buf, Ninput) != Ninput) {
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fprint(2, "page: short read reading %s\n", argv[0]);
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wexits("read");
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}
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}else
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b = nil;
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buf[Ninput] = '\0';
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if(imagemode)
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doc = initgfx(nil, 0, nil, nil, 0);
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else if(strncmp((char*)buf, "%PDF-", 5) == 0)
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doc = initpdf(b, argc, argv, buf, Ninput);
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else if(strncmp((char*)buf, "\x04%!", 2) == 0)
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doc = initps(b, argc, argv, buf, Ninput);
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else if(buf[0] == '\x1B' && strstr((char*)buf, "@PJL"))
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doc = initps(b, argc, argv, buf, Ninput);
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else if(strncmp((char*)buf, "%!", 2) == 0)
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doc = initps(b, argc, argv, buf, Ninput);
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else if(strcmp((char*)buf, "\xF7\x02\x01\x83\x92\xC0\x1C;") == 0)
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doc = initdvi(b, argc, argv, buf, Ninput);
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else if(strncmp((char*)buf, "\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1", 8) == 0)
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doc = initmsdoc(b, argc, argv, buf, Ninput);
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else if(strncmp((char*)buf, "x T ", 4) == 0)
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doc = inittroff(b, argc, argv, buf, Ninput);
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else {
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if(ppi != 100) {
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fprint(2, "page: you can't specify -p with graphic files\n");
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wexits("-p and graphics");
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}
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doc = initgfx(b, argc, argv, buf, Ninput);
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}
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if(doc == nil) {
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fprint(2, "page: error reading file: %r\n");
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wexits("document init");
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}
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if(doc->npage < 1 && !imagemode) {
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fprint(2, "page: no pages found?\n");
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wexits("pagecount");
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}
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if(reverse == -1) /* neither cmdline nor ps reader set it */
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reverse = 0;
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if(initdraw(0, 0, "page") < 0){
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fprint(2, "page: initdraw failed: %r\n");
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wexits("initdraw");
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}
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truecolor = screen->depth > 8;
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viewer(doc);
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wexits(0);
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}
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void
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wexits(char *s)
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{
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if(s && *s && strcmp(s, "note") != 0 && mknewwindow)
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sleep(10*1000);
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postnote(PNPROC, notewatcher, "die");
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exits(s);
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}
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