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[ncman] display section headers

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nick black 2021-12-06 13:10:45 -05:00 committed by nick black
parent 4b393e2c5f
commit dc833be329
1 changed files with 46 additions and 13 deletions
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59
src/man/main.c
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@ -297,11 +297,7 @@ get_type(const struct troffnode* trie, const unsigned char** ws, size_t len){
typedef struct pagenode {
char* text;
enum {
NODE_SECTION,
NODE_SUBSECTION,
NODE_PARAGRAPH,
} level;
const trofftype* ttype;
struct pagenode* subs;
unsigned subcount;
} pagenode;
@ -444,6 +440,15 @@ lex_title(pagedom* dom){
return 0;
}
static char*
extract_text(const unsigned char* ws, const unsigned char* feol){
if(ws == feol || ws + 1 == feol){
fprintf(stderr, "bogus empty title\n");
return NULL;
}
return strndup((const char*)ws + 1, feol - (ws + 1));
}
// extract the page structure.
static int
troff_parse(const unsigned char* map, size_t mlen, pagedom* dom){
@ -471,19 +476,25 @@ troff_parse(const unsigned char* map, size_t mlen, pagedom* dom){
fprintf(stderr, "found a second title (was %s)\n", dom_get_title(dom));
return -1;
}
if(ws == feol || ws + 1 == feol){
fprintf(stderr, "bogus empty title\n");
char* et = extract_text(ws, feol);
if(et == NULL){
return -1;
}
if((dom->root = malloc(sizeof(*dom->root))) == NULL){
free(et);
return -1;
}
if((dom->root->text = strndup((const char*)ws + 1, feol - (ws + 1))) == NULL){
return -1;
}
dom->root->ttype = node;
dom->root->text = et;
if(lex_title(dom)){
return -1;
}
}else if(node->ltype == LINE_SH){
char* et = extract_text(ws, feol);
if(et == NULL){
return -1;
}
// FIXME add it to current; we'll need a stack
}
}
off += eol - line;
@ -496,12 +507,33 @@ troff_parse(const unsigned char* map, size_t mlen, pagedom* dom){
return 0;
}
static int
draw_domnode(struct ncplane* p, const pagedom* dom, const pagenode* n){
switch(n->ttype->ltype){
case LINE_TH:
ncplane_printf_aligned(p, 0, NCALIGN_LEFT, "%s(%s)", dom->title, dom->section);
ncplane_printf_aligned(p, 0, NCALIGN_RIGHT, "%s(%s)", dom->title, dom->section);
break;
case LINE_SH: // section heading
ncplane_cursor_move_rel(p, 1, 0);
ncplane_putstr(p, n->text);
ncplane_cursor_move_rel(p, 2, 0);
ncplane_cursor_move_yx(p, -1, 0);
break;
default:
fprintf(stderr, "unhandled ltype %d\n", n->ttype->ltype);
return 0; // FIXME
}
return 0;
}
// for now, we draw the entire thing, resizing as necessary, and we'll
// scroll the entire plane. higher memory cost, longer initial latency,
// very fast moves.
static int
draw_content(struct ncplane* p){
const pagedom* dom = ncplane_userptr(p);
ncplane_printf_aligned(p, 0, NCALIGN_LEFT, "%s(%s)", dom->title, dom->section);
ncplane_printf_aligned(p, 0, NCALIGN_RIGHT, "%s(%s)", dom->title, dom->section);
return 0;
return draw_domnode(p, dom, dom->root);
}
static int
@ -589,6 +621,7 @@ pagedom_destroy(pagedom* dom){
free(dom->root);
free(dom->title);
free(dom->version);
free(dom->section);
}
static struct ncplane*