diff options
Diffstat (limited to 'src/man.c')
| -rw-r--r-- | src/man.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/src/man.c b/src/man.c new file mode 100644 index 0000000..b86c7e6 --- /dev/null +++ b/src/man.c @@ -0,0 +1,245 @@ +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <assert.h> + +#include "config.h" +#include "cmark.h" +#include "node.h" +#include "buffer.h" + +// Functions to convert cmark_nodes to groff man strings. + +static void escape_man(strbuf *dest, const unsigned char *source, int length) +{ + int i; + unsigned char c; + + for (i = 0; i < length; i++) { + c = source[i]; + if (c == '.' && i == 0) { + strbuf_puts(dest, "\\&."); + } else if (c == '\'' && i == 0) { + strbuf_puts(dest, "\\&'"); + } else if (c == '-') { + strbuf_puts(dest, "\\-"); + } else if (c == '\\') { + strbuf_puts(dest, "\\e"); + } else { + strbuf_putc(dest, source[i]); + } + } +} + +static inline void cr(strbuf *man) +{ + if (man->size && man->ptr[man->size - 1] != '\n') + strbuf_putc(man, '\n'); +} + +struct render_state { + strbuf* man; + cmark_node *plain; +}; + +static int +S_render_node(cmark_node *node, cmark_event_type ev_type, void *vstate) +{ + struct render_state *state = vstate; + cmark_node *tmp; + strbuf *man = state->man; + int list_number; + bool entering = (ev_type == CMARK_EVENT_ENTER); + + if (state->plain == node) { // back at original node + state->plain = NULL; + } + + if (state->plain != NULL) { + switch(node->type) { + case CMARK_NODE_TEXT: + case CMARK_NODE_INLINE_CODE: + case CMARK_NODE_INLINE_HTML: + escape_man(man, node->as.literal.data, + node->as.literal.len); + break; + + case CMARK_NODE_LINEBREAK: + case CMARK_NODE_SOFTBREAK: + strbuf_putc(man, ' '); + break; + + default: + break; + } + return 1; + } + + switch (node->type) { + case CMARK_NODE_BLOCK_QUOTE: + if (entering) { + cr(man); + strbuf_puts(man, ".RS"); + cr(man); + } else { + cr(man); + strbuf_puts(man, ".RE"); + cr(man); + } + break; + + case CMARK_NODE_LIST: + break; + + case CMARK_NODE_LIST_ITEM: + if (entering) { + cr(man); + strbuf_puts(man, ".IP "); + if (cmark_node_get_list_type(node->parent) == + CMARK_BULLET_LIST) { + strbuf_puts(man, "\\[bu] 2"); + } else { + list_number = cmark_node_get_list_start(node->parent); + tmp = node; + while (tmp->prev) { + tmp = tmp->prev; + list_number += 1; + } + strbuf_printf(man, "\"%d.\" 4", list_number); + } + cr(man); + } else { + cr(man); + } + break; + + case CMARK_NODE_HEADER: + if (entering) { + cr(man); + strbuf_puts(man, + cmark_node_get_header_level(node) == 1 ? + ".SH" : ".SS"); + cr(man); + } else { + cr(man); + } + break; + + case CMARK_NODE_CODE_BLOCK: + cr(man); + strbuf_puts(man, ".IP\n.nf\n\\f[C]\n"); + escape_man(man, node->string_content.ptr, + node->string_content.size); + cr(man); + strbuf_puts(man, "\\f[]\n.fi"); + cr(man); + break; + + case CMARK_NODE_HTML: + break; + + case CMARK_NODE_HRULE: + cr(man); + strbuf_puts(man, ".PP\n * * * * *"); + cr(man); + break; + + case CMARK_NODE_PARAGRAPH: + if (entering) { + // no blank line if first paragraph in list: + if (node->parent && + node->parent->type == CMARK_NODE_LIST_ITEM && + node->prev == NULL) { + // no blank line or .PP + } else { + cr(man); + strbuf_puts(man, ".PP\n"); + } + } else { + cr(man); + } + break; + + case CMARK_NODE_TEXT: + escape_man(man, node->as.literal.data, + node->as.literal.len); + break; + + case CMARK_NODE_LINEBREAK: + strbuf_puts(man, ".PD 0\n.P\n.PD"); + cr(man); + break; + + case CMARK_NODE_SOFTBREAK: + strbuf_putc(man, '\n'); + break; + + case CMARK_NODE_INLINE_CODE: + strbuf_puts(man, "\\f[C]"); + escape_man(man, node->as.literal.data, node->as.literal.len); + strbuf_puts(man, "\\f[]"); + break; + + case CMARK_NODE_INLINE_HTML: + break; + + case CMARK_NODE_STRONG: + if (entering) { + strbuf_puts(man, "\\f[B]"); + } else { + strbuf_puts(man, "\\f[]"); + } + break; + + case CMARK_NODE_EMPH: + if (entering) { + strbuf_puts(man, "\\f[I]"); + } else { + strbuf_puts(man, "\\f[]"); + } + break; + + case CMARK_NODE_LINK: + if (!entering) { + strbuf_printf(man, " (%s)", + cmark_node_get_url(node)); + } + break; + + case CMARK_NODE_IMAGE: + if (entering) { + strbuf_puts(man, "[IMAGE: "); + state->plain = node; + } else { + strbuf_puts(man, "]"); + } + break; + + default: + assert(false); + break; + } + + // strbuf_putc(man, 'x'); + return 1; +} + +char *cmark_render_man(cmark_node *root) +{ + char *result; + strbuf man = GH_BUF_INIT; + struct render_state state = { &man, NULL }; + cmark_node *cur; + cmark_event_type ev_type; + cmark_iter *iter = cmark_iter_new(root); + + while ((ev_type = cmark_iter_next(iter)) != CMARK_EVENT_DONE) { + cur = cmark_iter_get_node(iter); + S_render_node(cur, ev_type, &state); + } + result = (char *)strbuf_detach(&man); + + cmark_iter_free(iter); + strbuf_free(&man); + return result; +} |