diff options
Diffstat (limited to 'src/latex.c')
| -rw-r--r-- | src/latex.c | 434 |
1 files changed, 152 insertions, 282 deletions
diff --git a/src/latex.c b/src/latex.c index 6eaabce..c3d39da 100644 --- a/src/latex.c +++ b/src/latex.c @@ -10,275 +10,174 @@ #include "buffer.h" #include "utf8.h" #include "scanners.h" +#include "render.h" -// Functions to convert cmark_nodes to commonmark strings. - -struct render_state { - int options; - cmark_strbuf* buffer; - cmark_strbuf* prefix; - int column; - int width; - int need_cr; - int enumlevel; - bufsize_t last_breakable; - bool begin_line; - bool no_wrap; - bool in_tight_list_item; - bool silence; -}; - -static inline void cr(struct render_state *state) +static inline void outc(cmark_render_state *state, + cmark_escaping escape, + int32_t c, + unsigned char nextc) { - if (state->need_cr < 1) { - state->need_cr = 1; - } -} - -static inline void blankline(struct render_state *state) -{ - if (state->need_cr < 2) { - state->need_cr = 2; - } -} - -typedef enum { - LITERAL, - NORMAL, - URL -} escaping; - -static inline void out(struct render_state *state, - cmark_chunk str, - bool wrap, - escaping escape) -{ - unsigned char* source = str.data; - int length = str.len; - unsigned char nextc; - int32_t c; - int i = 0; - int len; - cmark_chunk remainder = cmark_chunk_literal(""); - int k = state->buffer->size - 1; - - if (state->silence) - return; - - wrap = wrap && !state->no_wrap; - - if (state->in_tight_list_item && state->need_cr > 1) { - state->need_cr = 1; - } - while (state->need_cr) { - if (k < 0 || state->buffer->ptr[k] == '\n') { - k -= 1; - } else { - cmark_strbuf_putc(state->buffer, '\n'); - if (state->need_cr > 1) { - cmark_strbuf_put(state->buffer, state->prefix->ptr, - state->prefix->size); - } - } - state->column = 0; - state->begin_line = true; - state->need_cr -= 1; - } - - while (i < length) { - if (state->begin_line) { - cmark_strbuf_put(state->buffer, state->prefix->ptr, - state->prefix->size); - // note: this assumes prefix is ascii: - state->column = state->prefix->size; - } - - len = utf8proc_iterate(source + i, length - i, &c); - if (len == -1) { // error condition - return; // return without rendering rest of string - } - nextc = source[i + len]; - if (c == 32 && wrap) { - if (!state->begin_line) { - cmark_strbuf_putc(state->buffer, ' '); + if (escape == LITERAL) { + utf8proc_encode_char(c, state->buffer); + state->column += 1; + } else { + switch(c) { + case 123: // '{' + case 125: // '}' + case 35: // '#' + case 37: // '%' + case 38: // '&' + cmark_strbuf_putc(state->buffer, '\\'); + utf8proc_encode_char(c, state->buffer); + state->column += 2; + break; + case 36: // '$' + case 95: // '_' + if (escape == NORMAL) { + cmark_strbuf_putc(state->buffer, '\\'); state->column += 1; - state->begin_line = false; - state->last_breakable = state->buffer->size - - 1; - // skip following spaces - while (source[i + 1] == ' ') { - i++; - } } - - } else if (c == 10) { - cmark_strbuf_putc(state->buffer, '\n'); - state->column = 0; - state->begin_line = true; - state->last_breakable = 0; - } else if (escape == LITERAL) { utf8proc_encode_char(c, state->buffer); - state->column += 2; - } else { - switch(c) { - case 123: // '{' - case 125: // '}' - case 35: // '#' - case 37: // '%' - case 38: // '&' + state->column += 1; + break; + case 45 : // '-' + if (nextc == 45) { // prevent ligature cmark_strbuf_putc(state->buffer, '\\'); + state->column += 1; + } + utf8proc_encode_char(c, state->buffer); + state->column += 1; + break; + case 126: // '~' + if (escape == NORMAL) { + cmark_strbuf_puts(state->buffer, + "\\textasciitilde{}"); + state->column += 17; + } else { utf8proc_encode_char(c, state->buffer); + state->column += 1; + } + break; + case 94: // '^' + cmark_strbuf_puts(state->buffer, + "\\^{}"); + state->column += 4; + break; + case 92: // '\\' + if (escape == URL) { + // / acts as path sep even on windows: + cmark_strbuf_puts(state->buffer, "/"); + state->column += 1; + } else { + cmark_strbuf_puts(state->buffer, + "\\textbackslash{}"); + state->column += 16; + } + break; + case 124: // '|' + cmark_strbuf_puts(state->buffer, + "\\textbar{}"); + state->column += 10; + break; + case 60: // '<' + cmark_strbuf_puts(state->buffer, + "\\textless{}"); + state->column += 11; + break; + case 62: // '>' + cmark_strbuf_puts(state->buffer, + "\\textgreater{}"); + state->column += 14; + break; + case 91: // '[' + case 93: // ']' + cmark_strbuf_putc(state->buffer, '{'); + utf8proc_encode_char(c, state->buffer); + cmark_strbuf_putc(state->buffer, '}'); + state->column += 3; + break; + case 34: // '"' + cmark_strbuf_puts(state->buffer, + "\\textquotedbl{}"); + // requires \usepackage[T1]{fontenc} + state->column += 15; + break; + case 39: // '\'' + cmark_strbuf_puts(state->buffer, + "\\textquotesingle{}"); + state->column += 18; + // requires \usepackage{textcomp} + break; + case 160: // nbsp + cmark_strbuf_putc(state->buffer, '~'); + state->column += 1; + break; + case 8230: // hellip + cmark_strbuf_puts(state->buffer, "\\ldots{}"); + state->column += 8; + break; + case 8216: // lsquo + if (escape == NORMAL) { + cmark_strbuf_putc(state->buffer, '`'); + state->column += 1; + } else { + utf8proc_encode_char(c, state->buffer); + state->column += 1; + } + break; + case 8217: // rsquo + if (escape == NORMAL) { + cmark_strbuf_putc(state->buffer, '\''); + state->column += 1; + } else { + utf8proc_encode_char(c, state->buffer); + state->column += 1; + } + break; + case 8220: // ldquo + if (escape == NORMAL) { + cmark_strbuf_puts(state->buffer, "``"); state->column += 2; - break; - case 36: // '$' - case 95: // '_' - if (escape == NORMAL) { - cmark_strbuf_putc(state->buffer, '\\'); - } + } else { utf8proc_encode_char(c, state->buffer); - break; - case 45 : // '-' - if (nextc == 45) { // prevent ligature - cmark_strbuf_putc(state->buffer, '\\'); - } + state->column += 1; + } + break; + case 8221: // rdquo + if (escape == NORMAL) { + cmark_strbuf_puts(state->buffer, "''"); + state->column += 2; + } else { utf8proc_encode_char(c, state->buffer); - break; - case 126: // '~' - if (escape == NORMAL) { - cmark_strbuf_puts(state->buffer, - "\\textasciitilde{}"); - } else { - utf8proc_encode_char(c, state->buffer); - } - break; - case 94: // '^' - cmark_strbuf_puts(state->buffer, - "\\^{}"); - break; - case 92: // '\\' - if (escape == URL) { - // / acts as path sep even on windows: - cmark_strbuf_puts(state->buffer, "/"); - } else { - cmark_strbuf_puts(state->buffer, - "\\textbackslash{}"); - } - break; - case 124: // '|' - cmark_strbuf_puts(state->buffer, - "\\textbar{}"); - break; - case 60: // '<' - cmark_strbuf_puts(state->buffer, - "\\textless{}"); - break; - case 62: // '>' - cmark_strbuf_puts(state->buffer, - "\\textgreater{}"); - break; - case 91: // '[' - case 93: // ']' - cmark_strbuf_putc(state->buffer, '{'); + state->column += 1; + } + break; + case 8212: // emdash + if (escape == NORMAL) { + cmark_strbuf_puts(state->buffer, "---"); + state->column += 3; + } else { utf8proc_encode_char(c, state->buffer); - cmark_strbuf_putc(state->buffer, '}'); - break; - case 34: // '"' - cmark_strbuf_puts(state->buffer, - "\\textquotedbl{}"); - // requires \usepackage[T1]{fontenc} - break; - case 39: // '\'' - cmark_strbuf_puts(state->buffer, - "\\textquotesingle{}"); - // requires \usepackage{textcomp} - break; - case 160: // nbsp - cmark_strbuf_putc(state->buffer, '~'); - break; - case 8230: // hellip - cmark_strbuf_puts(state->buffer, "\\ldots{}"); - break; - case 8216: // lsquo - if (escape == NORMAL) { - cmark_strbuf_putc(state->buffer, '`'); - } else { - utf8proc_encode_char(c, state->buffer); - } - break; - case 8217: // rsquo - if (escape == NORMAL) { - cmark_strbuf_putc(state->buffer, '\''); - } else { - utf8proc_encode_char(c, state->buffer); - } - break; - case 8220: // ldquo - if (escape == NORMAL) { - cmark_strbuf_puts(state->buffer, "``"); - } else { - utf8proc_encode_char(c, state->buffer); - } - break; - case 8221: // rdquo - if (escape == NORMAL) { - cmark_strbuf_puts(state->buffer, "''"); - } else { - utf8proc_encode_char(c, state->buffer); - } - break; - case 8212: // emdash - if (escape == NORMAL) { - cmark_strbuf_puts(state->buffer, "---"); - } else { - utf8proc_encode_char(c, state->buffer); - } - break; - case 8211: // endash - if (escape == NORMAL) { - cmark_strbuf_puts(state->buffer, "--"); - } else { - utf8proc_encode_char(c, state->buffer); - } - break; - default: + state->column += 1; + } + break; + case 8211: // endash + if (escape == NORMAL) { + cmark_strbuf_puts(state->buffer, "--"); + state->column += 2; + } else { utf8proc_encode_char(c, state->buffer); state->column += 1; - state->begin_line = false; } - } - - // If adding the character went beyond width, look for an - // earlier place where the line could be broken: - if (state->width > 0 && - state->column > state->width && - !state->begin_line && - state->last_breakable > 0) { - - // copy from last_breakable to remainder - cmark_chunk_set_cstr(&remainder, (char *) state->buffer->ptr + state->last_breakable + 1); - // truncate at last_breakable - cmark_strbuf_truncate(state->buffer, state->last_breakable); - // add newline, prefix, and remainder - cmark_strbuf_putc(state->buffer, '\n'); - cmark_strbuf_put(state->buffer, state->prefix->ptr, - state->prefix->size); - cmark_strbuf_put(state->buffer, remainder.data, remainder.len); - state->column = state->prefix->size + remainder.len; - cmark_chunk_free(&remainder); - state->last_breakable = 0; + break; + default: + utf8proc_encode_char(c, state->buffer); + state->column += 1; state->begin_line = false; } - - i += len; } } -static void lit(struct render_state *state, char *s, bool wrap) -{ - cmark_chunk str = cmark_chunk_literal(s); - out(state, str, wrap, LITERAL); -} - typedef enum { NO_LINK, URL_AUTOLINK, @@ -349,7 +248,7 @@ get_containing_block(cmark_node *node) static int S_render_node(cmark_node *node, cmark_event_type ev_type, - struct render_state *state) + cmark_render_state *state) { cmark_node *tmp; int list_number; @@ -568,9 +467,7 @@ S_render_node(cmark_node *node, cmark_event_type ev_type, // requires \include{graphicx} out(state, url, false, URL); lit(state, "}", false); - state->silence = true; // don't print the alt text - } else { - state->silence = false; + return 0; } break; @@ -584,32 +481,5 @@ S_render_node(cmark_node *node, cmark_event_type ev_type, char *cmark_render_latex(cmark_node *root, int options, int width) { - char *result; - cmark_strbuf commonmark = GH_BUF_INIT; - cmark_strbuf prefix = GH_BUF_INIT; - if (CMARK_OPT_HARDBREAKS & options) { - width = 0; - } - struct render_state state = { - options, &commonmark, &prefix, 0, width, - 0, 0, 0, true, false, false, false - }; - 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); - if (!S_render_node(cur, ev_type, &state)) { - // a false value causes us to skip processing - // the node's contents. this is used for - // autolinks. - cmark_iter_reset(iter, cur, CMARK_EVENT_EXIT); - } - } - result = (char *)cmark_strbuf_detach(&commonmark); - - cmark_strbuf_free(&prefix); - cmark_iter_free(iter); - return result; + return cmark_render(root, options, width, outc, S_render_node); } |