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support cross referencing in markdown renderer

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lxsang 2020-09-15 14:33:58 +02:00
parent 2a89d5a441
commit 38724476a2
4 changed files with 400 additions and 220 deletions
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dist/lua-0.5.2b.tar.gz vendored
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1
lib/md/md.c
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@ -24,6 +24,7 @@ static int l_md_to_html(lua_State *L)
} }
// duplicate top of the stack // duplicate top of the stack
lua_pushvalue(L, -1); lua_pushvalue(L, -1);
reset_hd_cnt();
if (md_html(input, if (md_html(input,
strlen(input), strlen(input),
md_process_output, md_process_output,

617
lib/md/md4c/md4c-html.c
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@ -29,88 +29,97 @@
#include "md4c-html.h" #include "md4c-html.h"
#include "entity.h" #include "entity.h"
static int hd_cnt[6] = {0, 0, 0, 0, 0, 0};
#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199409L #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199409L
/* C89/90 or old compilers in general may not understand "inline". */ /* C89/90 or old compilers in general may not understand "inline". */
#if defined __GNUC__ #if defined __GNUC__
#define inline __inline__ #define inline __inline__
#elif defined _MSC_VER #elif defined _MSC_VER
#define inline __inline #define inline __inline
#else #else
#define inline #define inline
#endif #endif
#endif #endif
#ifdef _WIN32 #ifdef _WIN32
#define snprintf _snprintf #define snprintf _snprintf
#endif #endif
typedef struct MD_HTML_tag MD_HTML; typedef struct MD_HTML_tag MD_HTML;
struct MD_HTML_tag { struct MD_HTML_tag
void (*process_output)(const MD_CHAR*, MD_SIZE, void*); {
void* userdata; void (*process_output)(const MD_CHAR *, MD_SIZE, void *);
void *userdata;
unsigned flags; unsigned flags;
int image_nesting_level; int image_nesting_level;
char escape_map[256]; char escape_map[256];
}; };
#define NEED_HTML_ESC_FLAG 0x1 #define NEED_HTML_ESC_FLAG 0x1
#define NEED_URL_ESC_FLAG 0x2 #define NEED_URL_ESC_FLAG 0x2
/***************************************** /*****************************************
*** HTML rendering helper functions *** *** HTML rendering helper functions ***
*****************************************/ *****************************************/
#define ISDIGIT(ch) ('0' <= (ch) && (ch) <= '9') #define ISDIGIT(ch) ('0' <= (ch) && (ch) <= '9')
#define ISLOWER(ch) ('a' <= (ch) && (ch) <= 'z') #define ISLOWER(ch) ('a' <= (ch) && (ch) <= 'z')
#define ISUPPER(ch) ('A' <= (ch) && (ch) <= 'Z') #define ISUPPER(ch) ('A' <= (ch) && (ch) <= 'Z')
#define ISALNUM(ch) (ISLOWER(ch) || ISUPPER(ch) || ISDIGIT(ch)) #define ISALNUM(ch) (ISLOWER(ch) || ISUPPER(ch) || ISDIGIT(ch))
static inline void static inline void
render_verbatim(MD_HTML* r, const MD_CHAR* text, MD_SIZE size) render_verbatim(MD_HTML *r, const MD_CHAR *text, MD_SIZE size)
{ {
r->process_output(text, size, r->userdata); r->process_output(text, size, r->userdata);
} }
/* Keep this as a macro. Most compiler should then be smart enough to replace /* Keep this as a macro. Most compiler should then be smart enough to replace
* the strlen() call with a compile-time constant if the string is a C literal. */ * the strlen() call with a compile-time constant if the string is a C literal. */
#define RENDER_VERBATIM(r, verbatim) \ #define RENDER_VERBATIM(r, verbatim) \
render_verbatim((r), (verbatim), (MD_SIZE) (strlen(verbatim))) render_verbatim((r), (verbatim), (MD_SIZE)(strlen(verbatim)))
static void static void
render_html_escaped(MD_HTML* r, const MD_CHAR* data, MD_SIZE size) render_html_escaped(MD_HTML *r, const MD_CHAR *data, MD_SIZE size)
{ {
MD_OFFSET beg = 0; MD_OFFSET beg = 0;
MD_OFFSET off = 0; MD_OFFSET off = 0;
/* Some characters need to be escaped in normal HTML text. */ /* Some characters need to be escaped in normal HTML text. */
#define NEED_HTML_ESC(ch) (r->escape_map[(unsigned char)(ch)] & NEED_HTML_ESC_FLAG) #define NEED_HTML_ESC(ch) (r->escape_map[(unsigned char)(ch)] & NEED_HTML_ESC_FLAG)
while(1) { while (1)
{
/* Optimization: Use some loop unrolling. */ /* Optimization: Use some loop unrolling. */
while(off + 3 < size && !NEED_HTML_ESC(data[off+0]) && !NEED_HTML_ESC(data[off+1]) while (off + 3 < size && !NEED_HTML_ESC(data[off + 0]) && !NEED_HTML_ESC(data[off + 1]) && !NEED_HTML_ESC(data[off + 2]) && !NEED_HTML_ESC(data[off + 3]))
&& !NEED_HTML_ESC(data[off+2]) && !NEED_HTML_ESC(data[off+3]))
off += 4; off += 4;
while(off < size && !NEED_HTML_ESC(data[off])) while (off < size && !NEED_HTML_ESC(data[off]))
off++; off++;
if(off > beg) if (off > beg)
render_verbatim(r, data + beg, off - beg); render_verbatim(r, data + beg, off - beg);
if(off < size) { if (off < size)
switch(data[off]) { {
case '&': RENDER_VERBATIM(r, "&amp;"); break; switch (data[off])
case '<': RENDER_VERBATIM(r, "&lt;"); break; {
case '>': RENDER_VERBATIM(r, "&gt;"); break; case '&':
case '"': RENDER_VERBATIM(r, "&quot;"); break; RENDER_VERBATIM(r, "&amp;");
break;
case '<':
RENDER_VERBATIM(r, "&lt;");
break;
case '>':
RENDER_VERBATIM(r, "&gt;");
break;
case '"':
RENDER_VERBATIM(r, "&quot;");
break;
} }
off++; off++;
} else { }
else
{
break; break;
} }
beg = off; beg = off;
@ -118,35 +127,42 @@ render_html_escaped(MD_HTML* r, const MD_CHAR* data, MD_SIZE size)
} }
static void static void
render_url_escaped(MD_HTML* r, const MD_CHAR* data, MD_SIZE size) render_url_escaped(MD_HTML *r, const MD_CHAR *data, MD_SIZE size)
{ {
static const MD_CHAR hex_chars[] = "0123456789ABCDEF"; static const MD_CHAR hex_chars[] = "0123456789ABCDEF";
MD_OFFSET beg = 0; MD_OFFSET beg = 0;
MD_OFFSET off = 0; MD_OFFSET off = 0;
/* Some characters need to be escaped in URL attributes. */ /* Some characters need to be escaped in URL attributes. */
#define NEED_URL_ESC(ch) (r->escape_map[(unsigned char)(ch)] & NEED_URL_ESC_FLAG) #define NEED_URL_ESC(ch) (r->escape_map[(unsigned char)(ch)] & NEED_URL_ESC_FLAG)
while(1) { while (1)
while(off < size && !NEED_URL_ESC(data[off])) {
while (off < size && !NEED_URL_ESC(data[off]))
off++; off++;
if(off > beg) if (off > beg)
render_verbatim(r, data + beg, off - beg); render_verbatim(r, data + beg, off - beg);
if(off < size) { if (off < size)
{
char hex[3]; char hex[3];
switch(data[off]) { switch (data[off])
case '&': RENDER_VERBATIM(r, "&amp;"); break; {
default: case '&':
hex[0] = '%'; RENDER_VERBATIM(r, "&amp;");
hex[1] = hex_chars[((unsigned)data[off] >> 4) & 0xf]; break;
hex[2] = hex_chars[((unsigned)data[off] >> 0) & 0xf]; default:
render_verbatim(r, hex, 3); hex[0] = '%';
break; hex[1] = hex_chars[((unsigned)data[off] >> 4) & 0xf];
hex[2] = hex_chars[((unsigned)data[off] >> 0) & 0xf];
render_verbatim(r, hex, 3);
break;
} }
off++; off++;
} else { }
else
{
break; break;
} }
@ -157,45 +173,52 @@ render_url_escaped(MD_HTML* r, const MD_CHAR* data, MD_SIZE size)
static unsigned static unsigned
hex_val(char ch) hex_val(char ch)
{ {
if('0' <= ch && ch <= '9') if ('0' <= ch && ch <= '9')
return ch - '0'; return ch - '0';
if('A' <= ch && ch <= 'Z') if ('A' <= ch && ch <= 'Z')
return ch - 'A' + 10; return ch - 'A' + 10;
else else
return ch - 'a' + 10; return ch - 'a' + 10;
} }
static void static void
render_utf8_codepoint(MD_HTML* r, unsigned codepoint, render_utf8_codepoint(MD_HTML *r, unsigned codepoint,
void (*fn_append)(MD_HTML*, const MD_CHAR*, MD_SIZE)) void (*fn_append)(MD_HTML *, const MD_CHAR *, MD_SIZE))
{ {
static const MD_CHAR utf8_replacement_char[] = { 0xef, 0xbf, 0xbd }; static const MD_CHAR utf8_replacement_char[] = {0xef, 0xbf, 0xbd};
unsigned char utf8[4]; unsigned char utf8[4];
size_t n; size_t n;
if(codepoint <= 0x7f) { if (codepoint <= 0x7f)
{
n = 1; n = 1;
utf8[0] = codepoint; utf8[0] = codepoint;
} else if(codepoint <= 0x7ff) { }
else if (codepoint <= 0x7ff)
{
n = 2; n = 2;
utf8[0] = 0xc0 | ((codepoint >> 6) & 0x1f); utf8[0] = 0xc0 | ((codepoint >> 6) & 0x1f);
utf8[1] = 0x80 + ((codepoint >> 0) & 0x3f); utf8[1] = 0x80 + ((codepoint >> 0) & 0x3f);
} else if(codepoint <= 0xffff) { }
else if (codepoint <= 0xffff)
{
n = 3; n = 3;
utf8[0] = 0xe0 | ((codepoint >> 12) & 0xf); utf8[0] = 0xe0 | ((codepoint >> 12) & 0xf);
utf8[1] = 0x80 + ((codepoint >> 6) & 0x3f); utf8[1] = 0x80 + ((codepoint >> 6) & 0x3f);
utf8[2] = 0x80 + ((codepoint >> 0) & 0x3f); utf8[2] = 0x80 + ((codepoint >> 0) & 0x3f);
} else { }
else
{
n = 4; n = 4;
utf8[0] = 0xf0 | ((codepoint >> 18) & 0x7); utf8[0] = 0xf0 | ((codepoint >> 18) & 0x7);
utf8[1] = 0x80 + ((codepoint >> 12) & 0x3f); utf8[1] = 0x80 + ((codepoint >> 12) & 0x3f);
utf8[2] = 0x80 + ((codepoint >> 6) & 0x3f); utf8[2] = 0x80 + ((codepoint >> 6) & 0x3f);
utf8[3] = 0x80 + ((codepoint >> 0) & 0x3f); utf8[3] = 0x80 + ((codepoint >> 0) & 0x3f);
} }
if(0 < codepoint && codepoint <= 0x10ffff) if (0 < codepoint && codepoint <= 0x10ffff)
fn_append(r, (char*)utf8, n); fn_append(r, (char *)utf8, n);
else else
fn_append(r, utf8_replacement_char, 3); fn_append(r, utf8_replacement_char, 3);
} }
@ -203,40 +226,48 @@ render_utf8_codepoint(MD_HTML* r, unsigned codepoint,
/* Translate entity to its UTF-8 equivalent, or output the verbatim one /* Translate entity to its UTF-8 equivalent, or output the verbatim one
* if such entity is unknown (or if the translation is disabled). */ * if such entity is unknown (or if the translation is disabled). */
static void static void
render_entity(MD_HTML* r, const MD_CHAR* text, MD_SIZE size, render_entity(MD_HTML *r, const MD_CHAR *text, MD_SIZE size,
void (*fn_append)(MD_HTML*, const MD_CHAR*, MD_SIZE)) void (*fn_append)(MD_HTML *, const MD_CHAR *, MD_SIZE))
{ {
if(r->flags & MD_HTML_FLAG_VERBATIM_ENTITIES) { if (r->flags & MD_HTML_FLAG_VERBATIM_ENTITIES)
{
render_verbatim(r, text, size); render_verbatim(r, text, size);
return; return;
} }
/* We assume UTF-8 output is what is desired. */ /* We assume UTF-8 output is what is desired. */
if(size > 3 && text[1] == '#') { if (size > 3 && text[1] == '#')
{
unsigned codepoint = 0; unsigned codepoint = 0;
if(text[2] == 'x' || text[2] == 'X') { if (text[2] == 'x' || text[2] == 'X')
{
/* Hexadecimal entity (e.g. "&#x1234abcd;")). */ /* Hexadecimal entity (e.g. "&#x1234abcd;")). */
MD_SIZE i; MD_SIZE i;
for(i = 3; i < size-1; i++) for (i = 3; i < size - 1; i++)
codepoint = 16 * codepoint + hex_val(text[i]); codepoint = 16 * codepoint + hex_val(text[i]);
} else { }
else
{
/* Decimal entity (e.g. "&1234;") */ /* Decimal entity (e.g. "&1234;") */
MD_SIZE i; MD_SIZE i;
for(i = 2; i < size-1; i++) for (i = 2; i < size - 1; i++)
codepoint = 10 * codepoint + (text[i] - '0'); codepoint = 10 * codepoint + (text[i] - '0');
} }
render_utf8_codepoint(r, codepoint, fn_append); render_utf8_codepoint(r, codepoint, fn_append);
return; return;
} else { }
else
{
/* Named entity (e.g. "&nbsp;"). */ /* Named entity (e.g. "&nbsp;"). */
const struct entity* ent; const struct entity *ent;
ent = entity_lookup(text, size); ent = entity_lookup(text, size);
if(ent != NULL) { if (ent != NULL)
{
render_utf8_codepoint(r, ent->codepoints[0], fn_append); render_utf8_codepoint(r, ent->codepoints[0], fn_append);
if(ent->codepoints[1]) if (ent->codepoints[1])
render_utf8_codepoint(r, ent->codepoints[1], fn_append); render_utf8_codepoint(r, ent->codepoints[1], fn_append);
return; return;
} }
@ -246,32 +277,40 @@ render_entity(MD_HTML* r, const MD_CHAR* text, MD_SIZE size,
} }
static void static void
render_attribute(MD_HTML* r, const MD_ATTRIBUTE* attr, render_attribute(MD_HTML *r, const MD_ATTRIBUTE *attr,
void (*fn_append)(MD_HTML*, const MD_CHAR*, MD_SIZE)) void (*fn_append)(MD_HTML *, const MD_CHAR *, MD_SIZE))
{ {
int i; int i;
for(i = 0; attr->substr_offsets[i] < attr->size; i++) { for (i = 0; attr->substr_offsets[i] < attr->size; i++)
{
MD_TEXTTYPE type = attr->substr_types[i]; MD_TEXTTYPE type = attr->substr_types[i];
MD_OFFSET off = attr->substr_offsets[i]; MD_OFFSET off = attr->substr_offsets[i];
MD_SIZE size = attr->substr_offsets[i+1] - off; MD_SIZE size = attr->substr_offsets[i + 1] - off;
const MD_CHAR* text = attr->text + off; const MD_CHAR *text = attr->text + off;
switch(type) { switch (type)
case MD_TEXT_NULLCHAR: render_utf8_codepoint(r, 0x0000, render_verbatim); break; {
case MD_TEXT_ENTITY: render_entity(r, text, size, fn_append); break; case MD_TEXT_NULLCHAR:
default: fn_append(r, text, size); break; render_utf8_codepoint(r, 0x0000, render_verbatim);
break;
case MD_TEXT_ENTITY:
render_entity(r, text, size, fn_append);
break;
default:
fn_append(r, text, size);
break;
} }
} }
} }
static void static void
render_open_ol_block(MD_HTML* r, const MD_BLOCK_OL_DETAIL* det) render_open_ol_block(MD_HTML *r, const MD_BLOCK_OL_DETAIL *det)
{ {
char buf[64]; char buf[64];
if(det->start == 1) { if (det->start == 1)
{
RENDER_VERBATIM(r, "<ol>\n"); RENDER_VERBATIM(r, "<ol>\n");
return; return;
} }
@ -281,26 +320,30 @@ render_open_ol_block(MD_HTML* r, const MD_BLOCK_OL_DETAIL* det)
} }
static void static void
render_open_li_block(MD_HTML* r, const MD_BLOCK_LI_DETAIL* det) render_open_li_block(MD_HTML *r, const MD_BLOCK_LI_DETAIL *det)
{ {
if(det->is_task) { if (det->is_task)
{
RENDER_VERBATIM(r, "<li class=\"task-list-item\">" RENDER_VERBATIM(r, "<li class=\"task-list-item\">"
"<input type=\"checkbox\" class=\"task-list-item-checkbox\" disabled"); "<input type=\"checkbox\" class=\"task-list-item-checkbox\" disabled");
if(det->task_mark == 'x' || det->task_mark == 'X') if (det->task_mark == 'x' || det->task_mark == 'X')
RENDER_VERBATIM(r, " checked"); RENDER_VERBATIM(r, " checked");
RENDER_VERBATIM(r, ">"); RENDER_VERBATIM(r, ">");
} else { }
else
{
RENDER_VERBATIM(r, "<li>"); RENDER_VERBATIM(r, "<li>");
} }
} }
static void static void
render_open_code_block(MD_HTML* r, const MD_BLOCK_CODE_DETAIL* det) render_open_code_block(MD_HTML *r, const MD_BLOCK_CODE_DETAIL *det)
{ {
RENDER_VERBATIM(r, "<pre><code"); RENDER_VERBATIM(r, "<pre><code");
/* If known, output the HTML 5 attribute class="language-LANGNAME". */ /* If known, output the HTML 5 attribute class="language-LANGNAME". */
if(det->lang.text != NULL) { if (det->lang.text != NULL)
{
RENDER_VERBATIM(r, " class=\"language-"); RENDER_VERBATIM(r, " class=\"language-");
render_attribute(r, &det->lang, render_html_escaped); render_attribute(r, &det->lang, render_html_escaped);
RENDER_VERBATIM(r, "\""); RENDER_VERBATIM(r, "\"");
@ -310,26 +353,36 @@ render_open_code_block(MD_HTML* r, const MD_BLOCK_CODE_DETAIL* det)
} }
static void static void
render_open_td_block(MD_HTML* r, const MD_CHAR* cell_type, const MD_BLOCK_TD_DETAIL* det) render_open_td_block(MD_HTML *r, const MD_CHAR *cell_type, const MD_BLOCK_TD_DETAIL *det)
{ {
RENDER_VERBATIM(r, "<"); RENDER_VERBATIM(r, "<");
RENDER_VERBATIM(r, cell_type); RENDER_VERBATIM(r, cell_type);
switch(det->align) { switch (det->align)
case MD_ALIGN_LEFT: RENDER_VERBATIM(r, " align=\"left\">"); break; {
case MD_ALIGN_CENTER: RENDER_VERBATIM(r, " align=\"center\">"); break; case MD_ALIGN_LEFT:
case MD_ALIGN_RIGHT: RENDER_VERBATIM(r, " align=\"right\">"); break; RENDER_VERBATIM(r, " align=\"left\">");
default: RENDER_VERBATIM(r, ">"); break; break;
case MD_ALIGN_CENTER:
RENDER_VERBATIM(r, " align=\"center\">");
break;
case MD_ALIGN_RIGHT:
RENDER_VERBATIM(r, " align=\"right\">");
break;
default:
RENDER_VERBATIM(r, ">");
break;
} }
} }
static void static void
render_open_a_span(MD_HTML* r, const MD_SPAN_A_DETAIL* det) render_open_a_span(MD_HTML *r, const MD_SPAN_A_DETAIL *det)
{ {
RENDER_VERBATIM(r, "<a href=\""); RENDER_VERBATIM(r, "<a href=\"");
render_attribute(r, &det->href, render_url_escaped); render_attribute(r, &det->href, render_url_escaped);
if(det->title.text != NULL) { if (det->title.text != NULL)
{
RENDER_VERBATIM(r, "\" title=\""); RENDER_VERBATIM(r, "\" title=\"");
render_attribute(r, &det->title, render_html_escaped); render_attribute(r, &det->title, render_html_escaped);
} }
@ -338,7 +391,7 @@ render_open_a_span(MD_HTML* r, const MD_SPAN_A_DETAIL* det)
} }
static void static void
render_open_img_span(MD_HTML* r, const MD_SPAN_IMG_DETAIL* det) render_open_img_span(MD_HTML *r, const MD_SPAN_IMG_DETAIL *det)
{ {
RENDER_VERBATIM(r, "<img src=\""); RENDER_VERBATIM(r, "<img src=\"");
render_attribute(r, &det->src, render_url_escaped); render_attribute(r, &det->src, render_url_escaped);
@ -349,9 +402,10 @@ render_open_img_span(MD_HTML* r, const MD_SPAN_IMG_DETAIL* det)
} }
static void static void
render_close_img_span(MD_HTML* r, const MD_SPAN_IMG_DETAIL* det) render_close_img_span(MD_HTML *r, const MD_SPAN_IMG_DETAIL *det)
{ {
if(det->title.text != NULL) { if (det->title.text != NULL)
{
RENDER_VERBATIM(r, "\" title=\""); RENDER_VERBATIM(r, "\" title=\"");
render_attribute(r, &det->title, render_html_escaped); render_attribute(r, &det->title, render_html_escaped);
} }
@ -362,7 +416,7 @@ render_close_img_span(MD_HTML* r, const MD_SPAN_IMG_DETAIL* det)
} }
static void static void
render_open_wikilink_span(MD_HTML* r, const MD_SPAN_WIKILINK_DETAIL* det) render_open_wikilink_span(MD_HTML *r, const MD_SPAN_WIKILINK_DETAIL *det)
{ {
RENDER_VERBATIM(r, "<x-wikilink data-target=\""); RENDER_VERBATIM(r, "<x-wikilink data-target=\"");
render_attribute(r, &det->target, render_html_escaped); render_attribute(r, &det->target, render_html_escaped);
@ -370,73 +424,136 @@ render_open_wikilink_span(MD_HTML* r, const MD_SPAN_WIKILINK_DETAIL* det)
RENDER_VERBATIM(r, "\">"); RENDER_VERBATIM(r, "\">");
} }
/************************************** /**************************************
*** HTML renderer implementation *** *** HTML renderer implementation ***
**************************************/ **************************************/
static int static int
enter_block_callback(MD_BLOCKTYPE type, void* detail, void* userdata) enter_block_callback(MD_BLOCKTYPE type, void *detail, void *userdata)
{ {
static const MD_CHAR* head[6] = { "<h1>", "<h2>", "<h3>", "<h4>", "<h5>", "<h6>" }; static const MD_CHAR *head[6] = {"<h1>", "<h2>", "<h3>", "<h4>", "<h5>", "<h6>"};
MD_HTML* r = (MD_HTML*) userdata; MD_HTML *r = (MD_HTML *)userdata;
char buf[32];
switch(type) { switch (type)
case MD_BLOCK_DOC: /* noop */ break; {
case MD_BLOCK_QUOTE: RENDER_VERBATIM(r, "<blockquote>\n"); break; case MD_BLOCK_DOC: /* noop */
case MD_BLOCK_UL: RENDER_VERBATIM(r, "<ul>\n"); break; break;
case MD_BLOCK_OL: render_open_ol_block(r, (const MD_BLOCK_OL_DETAIL*)detail); break; case MD_BLOCK_QUOTE:
case MD_BLOCK_LI: render_open_li_block(r, (const MD_BLOCK_LI_DETAIL*)detail); break; RENDER_VERBATIM(r, "<blockquote>\n");
case MD_BLOCK_HR: RENDER_VERBATIM(r, (r->flags & MD_HTML_FLAG_XHTML) ? "<hr />\n" : "<hr>\n"); break; break;
case MD_BLOCK_H: RENDER_VERBATIM(r, head[((MD_BLOCK_H_DETAIL*)detail)->level - 1]); break; case MD_BLOCK_UL:
case MD_BLOCK_CODE: render_open_code_block(r, (const MD_BLOCK_CODE_DETAIL*) detail); break; RENDER_VERBATIM(r, "<ul>\n");
case MD_BLOCK_HTML: /* noop */ break; break;
case MD_BLOCK_P: RENDER_VERBATIM(r, "<p>"); break; case MD_BLOCK_OL:
case MD_BLOCK_TABLE: RENDER_VERBATIM(r, "<table>\n"); break; render_open_ol_block(r, (const MD_BLOCK_OL_DETAIL *)detail);
case MD_BLOCK_THEAD: RENDER_VERBATIM(r, "<thead>\n"); break; break;
case MD_BLOCK_TBODY: RENDER_VERBATIM(r, "<tbody>\n"); break; case MD_BLOCK_LI:
case MD_BLOCK_TR: RENDER_VERBATIM(r, "<tr>\n"); break; render_open_li_block(r, (const MD_BLOCK_LI_DETAIL *)detail);
case MD_BLOCK_TH: render_open_td_block(r, "th", (MD_BLOCK_TD_DETAIL*)detail); break; break;
case MD_BLOCK_TD: render_open_td_block(r, "td", (MD_BLOCK_TD_DETAIL*)detail); break; case MD_BLOCK_HR:
RENDER_VERBATIM(r, (r->flags & MD_HTML_FLAG_XHTML) ? "<hr />\n" : "<hr>\n");
break;
case MD_BLOCK_H:
hd_cnt[((MD_BLOCK_H_DETAIL *)detail)->level - 1]++;
snprintf(buf, 32, "<a id=\"h%d_%d\"></a>", ((MD_BLOCK_H_DETAIL *)detail)->level, hd_cnt[((MD_BLOCK_H_DETAIL *)detail)->level - 1]);
RENDER_VERBATIM(r, buf);
RENDER_VERBATIM(r, head[((MD_BLOCK_H_DETAIL *)detail)->level - 1]);
break;
case MD_BLOCK_CODE:
render_open_code_block(r, (const MD_BLOCK_CODE_DETAIL *)detail);
break;
case MD_BLOCK_HTML: /* noop */
break;
case MD_BLOCK_P:
RENDER_VERBATIM(r, "<p>");
break;
case MD_BLOCK_TABLE:
RENDER_VERBATIM(r, "<table>\n");
break;
case MD_BLOCK_THEAD:
RENDER_VERBATIM(r, "<thead>\n");
break;
case MD_BLOCK_TBODY:
RENDER_VERBATIM(r, "<tbody>\n");
break;
case MD_BLOCK_TR:
RENDER_VERBATIM(r, "<tr>\n");
break;
case MD_BLOCK_TH:
render_open_td_block(r, "th", (MD_BLOCK_TD_DETAIL *)detail);
break;
case MD_BLOCK_TD:
render_open_td_block(r, "td", (MD_BLOCK_TD_DETAIL *)detail);
break;
} }
return 0; return 0;
} }
static int static int
leave_block_callback(MD_BLOCKTYPE type, void* detail, void* userdata) leave_block_callback(MD_BLOCKTYPE type, void *detail, void *userdata)
{ {
static const MD_CHAR* head[6] = { "</h1>\n", "</h2>\n", "</h3>\n", "</h4>\n", "</h5>\n", "</h6>\n" }; static const MD_CHAR *head[6] = {"</h1>\n", "</h2>\n", "</h3>\n", "</h4>\n", "</h5>\n", "</h6>\n"};
MD_HTML* r = (MD_HTML*) userdata; MD_HTML *r = (MD_HTML *)userdata;
switch (type)
switch(type) { {
case MD_BLOCK_DOC: /*noop*/ break; case MD_BLOCK_DOC: /*noop*/
case MD_BLOCK_QUOTE: RENDER_VERBATIM(r, "</blockquote>\n"); break; break;
case MD_BLOCK_UL: RENDER_VERBATIM(r, "</ul>\n"); break; case MD_BLOCK_QUOTE:
case MD_BLOCK_OL: RENDER_VERBATIM(r, "</ol>\n"); break; RENDER_VERBATIM(r, "</blockquote>\n");
case MD_BLOCK_LI: RENDER_VERBATIM(r, "</li>\n"); break; break;
case MD_BLOCK_HR: /*noop*/ break; case MD_BLOCK_UL:
case MD_BLOCK_H: RENDER_VERBATIM(r, head[((MD_BLOCK_H_DETAIL*)detail)->level - 1]); break; RENDER_VERBATIM(r, "</ul>\n");
case MD_BLOCK_CODE: RENDER_VERBATIM(r, "</code></pre>\n"); break; break;
case MD_BLOCK_HTML: /* noop */ break; case MD_BLOCK_OL:
case MD_BLOCK_P: RENDER_VERBATIM(r, "</p>\n"); break; RENDER_VERBATIM(r, "</ol>\n");
case MD_BLOCK_TABLE: RENDER_VERBATIM(r, "</table>\n"); break; break;
case MD_BLOCK_THEAD: RENDER_VERBATIM(r, "</thead>\n"); break; case MD_BLOCK_LI:
case MD_BLOCK_TBODY: RENDER_VERBATIM(r, "</tbody>\n"); break; RENDER_VERBATIM(r, "</li>\n");
case MD_BLOCK_TR: RENDER_VERBATIM(r, "</tr>\n"); break; break;
case MD_BLOCK_TH: RENDER_VERBATIM(r, "</th>\n"); break; case MD_BLOCK_HR: /*noop*/
case MD_BLOCK_TD: RENDER_VERBATIM(r, "</td>\n"); break; break;
case MD_BLOCK_H:
RENDER_VERBATIM(r, head[((MD_BLOCK_H_DETAIL *)detail)->level - 1]);
break;
case MD_BLOCK_CODE:
RENDER_VERBATIM(r, "</code></pre>\n");
break;
case MD_BLOCK_HTML: /* noop */
break;
case MD_BLOCK_P:
RENDER_VERBATIM(r, "</p>\n");
break;
case MD_BLOCK_TABLE:
RENDER_VERBATIM(r, "</table>\n");
break;
case MD_BLOCK_THEAD:
RENDER_VERBATIM(r, "</thead>\n");
break;
case MD_BLOCK_TBODY:
RENDER_VERBATIM(r, "</tbody>\n");
break;
case MD_BLOCK_TR:
RENDER_VERBATIM(r, "</tr>\n");
break;
case MD_BLOCK_TH:
RENDER_VERBATIM(r, "</th>\n");
break;
case MD_BLOCK_TD:
RENDER_VERBATIM(r, "</td>\n");
break;
} }
return 0; return 0;
} }
static int static int
enter_span_callback(MD_SPANTYPE type, void* detail, void* userdata) enter_span_callback(MD_SPANTYPE type, void *detail, void *userdata)
{ {
MD_HTML* r = (MD_HTML*) userdata; MD_HTML *r = (MD_HTML *)userdata;
if(r->image_nesting_level > 0) { if (r->image_nesting_level > 0)
{
/* We are inside a Markdown image label. Markdown allows to use any /* We are inside a Markdown image label. Markdown allows to use any
* emphasis and other rich contents in that context similarly as in * emphasis and other rich contents in that context similarly as in
* any link label. * any link label.
@ -455,85 +572,136 @@ enter_span_callback(MD_SPANTYPE type, void* detail, void* userdata)
return 0; return 0;
} }
switch(type) { switch (type)
case MD_SPAN_EM: RENDER_VERBATIM(r, "<em>"); break; {
case MD_SPAN_STRONG: RENDER_VERBATIM(r, "<strong>"); break; case MD_SPAN_EM:
case MD_SPAN_U: RENDER_VERBATIM(r, "<u>"); break; RENDER_VERBATIM(r, "<em>");
case MD_SPAN_A: render_open_a_span(r, (MD_SPAN_A_DETAIL*) detail); break; break;
case MD_SPAN_IMG: render_open_img_span(r, (MD_SPAN_IMG_DETAIL*) detail); break; case MD_SPAN_STRONG:
case MD_SPAN_CODE: RENDER_VERBATIM(r, "<code>"); break; RENDER_VERBATIM(r, "<strong>");
case MD_SPAN_DEL: RENDER_VERBATIM(r, "<del>"); break; break;
case MD_SPAN_LATEXMATH: RENDER_VERBATIM(r, "<x-equation>"); break; case MD_SPAN_U:
case MD_SPAN_LATEXMATH_DISPLAY: RENDER_VERBATIM(r, "<x-equation type=\"display\">"); break; RENDER_VERBATIM(r, "<u>");
case MD_SPAN_WIKILINK: render_open_wikilink_span(r, (MD_SPAN_WIKILINK_DETAIL*) detail); break; break;
case MD_SPAN_A:
render_open_a_span(r, (MD_SPAN_A_DETAIL *)detail);
break;
case MD_SPAN_IMG:
render_open_img_span(r, (MD_SPAN_IMG_DETAIL *)detail);
break;
case MD_SPAN_CODE:
RENDER_VERBATIM(r, "<code>");
break;
case MD_SPAN_DEL:
RENDER_VERBATIM(r, "<del>");
break;
case MD_SPAN_LATEXMATH:
RENDER_VERBATIM(r, "<x-equation>");
break;
case MD_SPAN_LATEXMATH_DISPLAY:
RENDER_VERBATIM(r, "<x-equation type=\"display\">");
break;
case MD_SPAN_WIKILINK:
render_open_wikilink_span(r, (MD_SPAN_WIKILINK_DETAIL *)detail);
break;
} }
return 0; return 0;
} }
static int static int
leave_span_callback(MD_SPANTYPE type, void* detail, void* userdata) leave_span_callback(MD_SPANTYPE type, void *detail, void *userdata)
{ {
MD_HTML* r = (MD_HTML*) userdata; MD_HTML *r = (MD_HTML *)userdata;
if(r->image_nesting_level > 0) { if (r->image_nesting_level > 0)
{
/* Ditto as in enter_span_callback(), except we have to allow the /* Ditto as in enter_span_callback(), except we have to allow the
* end of the <img> tag. */ * end of the <img> tag. */
if(r->image_nesting_level == 1 && type == MD_SPAN_IMG) if (r->image_nesting_level == 1 && type == MD_SPAN_IMG)
render_close_img_span(r, (MD_SPAN_IMG_DETAIL*) detail); render_close_img_span(r, (MD_SPAN_IMG_DETAIL *)detail);
return 0; return 0;
} }
switch(type) { switch (type)
case MD_SPAN_EM: RENDER_VERBATIM(r, "</em>"); break; {
case MD_SPAN_STRONG: RENDER_VERBATIM(r, "</strong>"); break; case MD_SPAN_EM:
case MD_SPAN_U: RENDER_VERBATIM(r, "</u>"); break; RENDER_VERBATIM(r, "</em>");
case MD_SPAN_A: RENDER_VERBATIM(r, "</a>"); break; break;
case MD_SPAN_IMG: /*noop, handled above*/ break; case MD_SPAN_STRONG:
case MD_SPAN_CODE: RENDER_VERBATIM(r, "</code>"); break; RENDER_VERBATIM(r, "</strong>");
case MD_SPAN_DEL: RENDER_VERBATIM(r, "</del>"); break; break;
case MD_SPAN_LATEXMATH: /*fall through*/ case MD_SPAN_U:
case MD_SPAN_LATEXMATH_DISPLAY: RENDER_VERBATIM(r, "</x-equation>"); break; RENDER_VERBATIM(r, "</u>");
case MD_SPAN_WIKILINK: RENDER_VERBATIM(r, "</x-wikilink>"); break; break;
case MD_SPAN_A:
RENDER_VERBATIM(r, "</a>");
break;
case MD_SPAN_IMG: /*noop, handled above*/
break;
case MD_SPAN_CODE:
RENDER_VERBATIM(r, "</code>");
break;
case MD_SPAN_DEL:
RENDER_VERBATIM(r, "</del>");
break;
case MD_SPAN_LATEXMATH: /*fall through*/
case MD_SPAN_LATEXMATH_DISPLAY:
RENDER_VERBATIM(r, "</x-equation>");
break;
case MD_SPAN_WIKILINK:
RENDER_VERBATIM(r, "</x-wikilink>");
break;
} }
return 0; return 0;
} }
static int static int
text_callback(MD_TEXTTYPE type, const MD_CHAR* text, MD_SIZE size, void* userdata) text_callback(MD_TEXTTYPE type, const MD_CHAR *text, MD_SIZE size, void *userdata)
{ {
MD_HTML* r = (MD_HTML*) userdata; MD_HTML *r = (MD_HTML *)userdata;
switch(type) { switch (type)
case MD_TEXT_NULLCHAR: render_utf8_codepoint(r, 0x0000, render_verbatim); break; {
case MD_TEXT_BR: RENDER_VERBATIM(r, (r->image_nesting_level == 0 case MD_TEXT_NULLCHAR:
? ((r->flags & MD_HTML_FLAG_XHTML) ? "<br />\n" : "<br>\n") render_utf8_codepoint(r, 0x0000, render_verbatim);
: " ")); break;
break; case MD_TEXT_BR:
case MD_TEXT_SOFTBR: RENDER_VERBATIM(r, (r->image_nesting_level == 0 ? "\n" : " ")); break; RENDER_VERBATIM(r, (r->image_nesting_level == 0
case MD_TEXT_HTML: render_verbatim(r, text, size); break; ? ((r->flags & MD_HTML_FLAG_XHTML) ? "<br />\n" : "<br>\n")
case MD_TEXT_ENTITY: render_entity(r, text, size, render_html_escaped); break; : " "));
default: render_html_escaped(r, text, size); break; break;
case MD_TEXT_SOFTBR:
RENDER_VERBATIM(r, (r->image_nesting_level == 0 ? "\n" : " "));
break;
case MD_TEXT_HTML:
render_verbatim(r, text, size);
break;
case MD_TEXT_ENTITY:
render_entity(r, text, size, render_html_escaped);
break;
default:
render_html_escaped(r, text, size);
break;
} }
return 0; return 0;
} }
static void static void
debug_log_callback(const char* msg, void* userdata) debug_log_callback(const char *msg, void *userdata)
{ {
MD_HTML* r = (MD_HTML*) userdata; MD_HTML *r = (MD_HTML *)userdata;
if(r->flags & MD_HTML_FLAG_DEBUG) if (r->flags & MD_HTML_FLAG_DEBUG)
fprintf(stderr, "MD4C: %s\n", msg); fprintf(stderr, "MD4C: %s\n", msg);
} }
int int md_html(const MD_CHAR *input, MD_SIZE input_size,
md_html(const MD_CHAR* input, MD_SIZE input_size, void (*process_output)(const MD_CHAR *, MD_SIZE, void *),
void (*process_output)(const MD_CHAR*, MD_SIZE, void*), void *userdata, unsigned parser_flags, unsigned renderer_flags)
void* userdata, unsigned parser_flags, unsigned renderer_flags)
{ {
MD_HTML render = { process_output, userdata, renderer_flags, 0, { 0 } }; MD_HTML render = {process_output, userdata, renderer_flags, 0, {0}};
int i; int i;
MD_PARSER parser = { MD_PARSER parser = {
@ -545,29 +713,38 @@ md_html(const MD_CHAR* input, MD_SIZE input_size,
leave_span_callback, leave_span_callback,
text_callback, text_callback,
debug_log_callback, debug_log_callback,
NULL NULL};
};
/* Build map of characters which need escaping. */ /* Build map of characters which need escaping. */
for(i = 0; i < 256; i++) { for (i = 0; i < 256; i++)
unsigned char ch = (unsigned char) i; {
unsigned char ch = (unsigned char)i;
if(strchr("\"&<>", ch) != NULL) if (strchr("\"&<>", ch) != NULL)
render.escape_map[i] |= NEED_HTML_ESC_FLAG; render.escape_map[i] |= NEED_HTML_ESC_FLAG;
if(!ISALNUM(ch) && strchr("-_.+!*(),%#@?=;:/,+$", ch) == NULL) if (!ISALNUM(ch) && strchr("-_.+!*(),%#@?=;:/,+$", ch) == NULL)
render.escape_map[i] |= NEED_URL_ESC_FLAG; render.escape_map[i] |= NEED_URL_ESC_FLAG;
} }
/* Consider skipping UTF-8 byte order mark (BOM). */ /* Consider skipping UTF-8 byte order mark (BOM). */
if(renderer_flags & MD_HTML_FLAG_SKIP_UTF8_BOM && sizeof(MD_CHAR) == 1) { if (renderer_flags & MD_HTML_FLAG_SKIP_UTF8_BOM && sizeof(MD_CHAR) == 1)
static const MD_CHAR bom[3] = { 0xef, 0xbb, 0xbf }; {
if(input_size >= sizeof(bom) && memcmp(input, bom, sizeof(bom)) == 0) { static const MD_CHAR bom[3] = {0xef, 0xbb, 0xbf};
if (input_size >= sizeof(bom) && memcmp(input, bom, sizeof(bom)) == 0)
{
input += sizeof(bom); input += sizeof(bom);
input_size -= sizeof(bom); input_size -= sizeof(bom);
} }
} }
return md_parse(input, input_size, &parser, (void*) &render); return md_parse(input, input_size, &parser, (void *)&render);
} }
void reset_hd_cnt()
{
for (size_t i = 0; i < 6; i++)
{
hd_cnt[i] = 0;
}
}

2
lib/md/md4c/md4c-html.h
View File

@ -61,6 +61,8 @@ int md_html(const MD_CHAR* input, MD_SIZE input_size,
void* userdata, unsigned parser_flags, unsigned renderer_flags); void* userdata, unsigned parser_flags, unsigned renderer_flags);
void reset_hd_cnt();
#ifdef __cplusplus #ifdef __cplusplus
} /* extern "C" { */ } /* extern "C" { */
#endif #endif