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/*
*
* Copyright (c) 2022, Masatake YAMATO
*
* This source code is released for free distribution under the terms of the
* GNU General Public License version 2 or (at your option) any later version.
*
* This module contains functions for generating tags for R Markdown files.
* https://bookdown.org/yihui/rmarkdown/
*
*/
/*
* INCLUDE FILES
*/
#include "general.h" /* must always come first */
#include "markdown.h"
#include "entry.h"
#include "parse.h"
#include <ctype.h>
#include <string.h>
/*
* DATA DEFINITIONS
*/
typedef enum {
K_CHUNK_LABEL = 0,
} rmarkdownKind;
static kindDefinition RMarkdownKinds[] = {
{ true, 'l', "chunklabel", "chunk labels"},
};
struct sRMarkdownSubparser {
markdownSubparser markdown;
};
/*
* FUNCTION DEFINITIONS
*/
static void findRMarkdownTags (void)
{
scheduleRunningBaseparser (0);
}
#define skip_space(CP) while (*CP == ' ' || *CP == '\t') CP++;
static void makeRMarkdownTag (vString *name, int kindIndex, bool anonymous)
{
tagEntryInfo e;
initTagEntry (&e, vStringValue (name), kindIndex);
if (anonymous)
markTagExtraBit (&e, XTAG_ANONYMOUS);
makeTagEntry (&e);
}
static bool extractLanguageForCodeBlock (markdownSubparser *s,
const char *langMarker,
vString *langName)
{
const char *cp = langMarker;
if (*cp != '{')
return false;
cp++;
const char *end = strpbrk(cp, " \t,}");
if (!end)
return false;
if (end - cp == 0)
return false;
vStringNCatS (langName, cp, end - cp);
cp = end;
if (*cp == ',' || *cp == '}')
{
vString *name = anonGenerateNew("__anon", K_CHUNK_LABEL);
makeRMarkdownTag (name, K_CHUNK_LABEL, true);
vStringDelete (name);
return true;
}
skip_space(cp);
vString *chunk_label = vStringNew ();
bool anonymous = false;
while (isalnum((unsigned char)*cp) || *cp == '-')
vStringPut (chunk_label, *cp++);
if (vStringLength (chunk_label) == 0)
{
anonGenerate (chunk_label, "__anon", K_CHUNK_LABEL);
anonymous = true;
}
skip_space(cp);
if (*cp == ',' || *cp == '}')
makeRMarkdownTag (chunk_label, K_CHUNK_LABEL, anonymous);
vStringDelete (chunk_label);
return true;
}
extern parserDefinition* RMarkdownParser (void)
{
static const char *const extensions [] = { "rmd", NULL };
static struct sRMarkdownSubparser rmarkdownSubparser = {
.markdown = {
.subparser = {
.direction = SUBPARSER_SUB_RUNS_BASE,
},
.extractLanguageForCodeBlock = extractLanguageForCodeBlock,
},
};
static parserDependency dependencies [] = {
[0] = { DEPTYPE_SUBPARSER, "Markdown", &rmarkdownSubparser },
};
parserDefinition* const def = parserNew ("RMarkdown");
def->dependencies = dependencies;
def->dependencyCount = ARRAY_SIZE(dependencies);
def->kindTable = RMarkdownKinds;
def->kindCount = ARRAY_SIZE (RMarkdownKinds);
def->extensions = extensions;
def->parser = findRMarkdownTags;
return def;
}
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