static gchar *
url_extract (const guchar **text,
gboolean full_url)
{
const guchar *end = *text, *p;
gchar *out;
while (*end && is_url_char (*end))
end++;
/* Back up if we probably went too far. */
while (end > *text && is_trailing_garbage (*(end - 1)))
end--;
if (full_url) {
/* Make sure this really looks like a URL. */
p = memchr (*text, ':', end - *text);
if (!p || end - p < 4)
return NULL;
} else {
/* Make sure this really looks like a hostname. */
p = memchr (*text, '.', end - *text);
if (!p || p >= end - 2)
return NULL;
p = memchr (p + 2, '.', end - (p + 2));
if (!p || p >= end - 2)
return NULL;
}
out = g_strndup ((gchar *) * text, end - *text);
*text = end;
return out;
}
//
// HTMLエスケープ
//
// include_url : URL中でもエスケープする( デフォルト = true )
//
const std::string MISC::html_escape( const std::string& str, const bool include_url )
{
if( str.empty() ) return str;
bool is_url = false;
int scheme = SCHEME_NONE;
std::string str_out;
const size_t str_length = str.length();
for( size_t pos = 0; pos < str_length; ++pos )
{
char tmpchar = str.c_str()[ pos ];
// URL中はエスケープしない場合
if( ! include_url )
{
// URLとして扱うかどうか
// エスケープには影響がないので loose_url としておく
if( scheme != SCHEME_NONE ) is_url = is_url_char( str.c_str() + pos, true );
// URLスキームが含まれているか判別
int len = 0;
if( ! is_url ) scheme = is_url_scheme( str.c_str() + pos, &len );
// URLスキームが含まれていた場合は文字数分進めてループに戻る
if( len > 0 )
{
str_out += str.substr( pos, len );
pos += len - 1; // あとで ++pos される分を引く
continue;
}
}
// include_url = false でURL中ならエスケープしない
if( is_url ) str_out += tmpchar;
else if( tmpchar == '&' )
{
const int bufsize = 64;
char out_char[ bufsize ];
int n_in, n_out;
const int type = DBTREE::decode_char( str.c_str() + pos, n_in, out_char, n_out, false );
if( type == DBTREE::NODE_NONE ) str_out += "&";
else str_out += tmpchar;
}
else if( tmpchar == '\"' ) str_out += """;
else if( tmpchar == '<' ) str_out += "<";
else if( tmpchar == '>' ) str_out += ">";
else str_out += tmpchar;
}
#ifdef _DEBUG
if( str != str_out ){
std::cout << "MISC::html_escape\nstr = " << str << std::endl
<< "out = " << str_out << std::endl;
}
#endif
return str_out;
}
/**
* e_text_to_html_full:
* @input: a NUL-terminated input buffer
* @flags: some combination of the E_TEXT_TO_HTML_* flags defined
* in e-html-utils.h
* @color: color for citation highlighting
*
* This takes a buffer of text as input and produces a buffer of
* "equivalent" HTML, subject to certain transformation rules.
*
* The set of possible flags is:
*
* - E_TEXT_TO_HTML_PRE: wrap the output HTML in <PRE> and
* </PRE> Should only be used if @input is the entire
* buffer to be converted. If e_text_to_html is being called with
* small pieces of data, you should wrap the entire result in
* <PRE> yourself.
*
* - E_TEXT_TO_HTML_CONVERT_NL: convert "\n" to "<BR>n" on
* output. (Should not be used with E_TEXT_TO_HTML_PRE, since
* that would result in double-newlines.)
*
* - E_TEXT_TO_HTML_CONVERT_SPACES: convert a block of N spaces
* into N-1 non-breaking spaces and one normal space. A space
* at the start of the buffer is always converted to a
* non-breaking space, regardless of the following character,
* which probably means you don't want to use this flag on
* pieces of data that aren't delimited by at least line breaks.
*
* If E_TEXT_TO_HTML_CONVERT_NL and E_TEXT_TO_HTML_CONVERT_SPACES
* are both defined, then TABs will also be converted to spaces.
*
* - E_TEXT_TO_HTML_CONVERT_URLS: wrap <a href="..."> </a>
* around strings that look like URLs.
*
* - E_TEXT_TO_HTML_CONVERT_ADDRESSES: wrap <a href="mailto:...">
* </a> around strings that look like mail addresses.
*
* - E_TEXT_TO_HTML_MARK_CITATION: wrap <font color="...">
* </font> around citations (lines beginning with "> ", etc).
*
* - E_TEXT_TO_HTML_ESCAPE_8BIT: flatten everything to US-ASCII
*
* - E_TEXT_TO_HTML_CITE: quote the text with "> " at the start of each
* line.
*
* Returns: a newly-allocated string containing HTML
**/
gchar *
e_text_to_html_full (const gchar *input,
guint flags,
guint32 color)
{
const guchar *cur, *next, *linestart;
gchar *buffer = NULL;
gchar *out = NULL;
gint buffer_size = 0, col;
gboolean colored = FALSE, saw_citation = FALSE;
/* Allocate a translation buffer. */
buffer_size = strlen (input) * 2 + 5;
buffer = g_malloc (buffer_size);
out = buffer;
if (flags & E_TEXT_TO_HTML_PRE)
out += sprintf (out, "<PRE>");
col = 0;
for (cur = linestart = (const guchar *) input; cur && *cur; cur = next) {
gunichar u;
if (flags & E_TEXT_TO_HTML_MARK_CITATION && col == 0) {
saw_citation = is_citation (cur, saw_citation);
if (saw_citation) {
if (!colored) {
gchar font[25];
g_snprintf (font, 25, "<FONT COLOR=\"#%06x\">", color);
out = check_size (&buffer, &buffer_size, out, 25);
out += sprintf (out, "%s", font);
colored = TRUE;
}
} else if (colored) {
const gchar *no_font = "</FONT>";
out = check_size (&buffer, &buffer_size, out, 9);
out += sprintf (out, "%s", no_font);
colored = FALSE;
}
/* Display mbox-mangled ">From" as "From" */
if (*cur == '>' && !saw_citation)
cur++;
} else if (flags & E_TEXT_TO_HTML_CITE && col == 0) {
out = check_size (&buffer, &buffer_size, out, 5);
out += sprintf (out, "> ");
}
u = g_utf8_get_char ((gchar *) cur);
if (g_unichar_isalpha (u) &&
(flags & E_TEXT_TO_HTML_CONVERT_URLS)) {
gchar *tmpurl = NULL, *refurl = NULL, *dispurl = NULL;
if (!g_ascii_strncasecmp ((gchar *)cur, "http://", 7) ||
!g_ascii_strncasecmp ((gchar *)cur, "https://", 8) ||
!g_ascii_strncasecmp ((gchar *)cur, "ftp://", 6) ||
!g_ascii_strncasecmp ((gchar *)cur, "nntp://", 7) ||
!g_ascii_strncasecmp ((gchar *)cur, "mailto:", 7) ||
!g_ascii_strncasecmp ((gchar *)cur, "news:", 5) ||
!g_ascii_strncasecmp ((gchar *)cur, "file:", 5) ||
!g_ascii_strncasecmp ((gchar *)cur, "callto:", 7) ||
!g_ascii_strncasecmp ((gchar *)cur, "h323:", 5) ||
!g_ascii_strncasecmp ((gchar *)cur, "sip:", 4) ||
!g_ascii_strncasecmp ((gchar *)cur, "webcal:", 7)) {
tmpurl = url_extract (&cur, TRUE);
if (tmpurl) {
refurl = e_text_to_html (tmpurl, 0);
dispurl = g_strdup (refurl);
}
} else if (!g_ascii_strncasecmp ((gchar *)cur, "www.", 4) &&
is_url_char (*(cur + 4))) {
tmpurl = url_extract (&cur, FALSE);
if (tmpurl) {
dispurl = e_text_to_html (tmpurl, 0);
refurl = g_strdup_printf ("http://%s",
dispurl);
}
}
if (tmpurl) {
out = check_size (&buffer, &buffer_size, out,
strlen (refurl) +
strlen (dispurl) + 15);
out += sprintf (out,
"<a href=\"%s\">%s</a>",
refurl, dispurl);
col += strlen (tmpurl);
g_free (tmpurl);
g_free (refurl);
g_free (dispurl);
}
if (!*cur)
break;
u = g_utf8_get_char ((gchar *) cur);
}
if (u == '@' && (flags & E_TEXT_TO_HTML_CONVERT_ADDRESSES)) {
gchar *addr, *dispaddr, *outaddr;
addr = email_address_extract (&cur, &out, linestart);
if (addr) {
dispaddr = e_text_to_html (addr, 0);
outaddr = g_strdup_printf ("<a href=\"mailto:%s\">%s</a>",
addr, dispaddr);
out = check_size (&buffer, &buffer_size, out, strlen (outaddr));
out += sprintf (out, "%s", outaddr);
col += strlen (addr);
g_free (addr);
g_free (dispaddr);
g_free (outaddr);
if (!*cur)
break;
u = g_utf8_get_char ((gchar *) cur);
}
}
if (!g_unichar_validate (u)) {
/* Sigh. Someone sent undeclared 8-bit data.
* Assume it's iso-8859-1.
*/
u = *cur;
next = cur + 1;
} else
next = (const guchar *) g_utf8_next_char (cur);
out = check_size (&buffer, &buffer_size, out, 10);
switch (u) {
case '<':
strcpy (out, "<");
out += 4;
col++;
break;
case '>':
strcpy (out, ">");
out += 4;
col++;
break;
case '&':
strcpy (out, "&");
out += 5;
col++;
break;
case '"':
strcpy (out, """);
out += 6;
col++;
break;
case '\n':
if (flags & E_TEXT_TO_HTML_CONVERT_NL) {
strcpy (out, "<br>");
out += 4;
}
*out++ = *cur;
linestart = cur;
col = 0;
break;
case '\t':
if (flags & (E_TEXT_TO_HTML_CONVERT_SPACES |
E_TEXT_TO_HTML_CONVERT_NL)) {
do {
out = check_size (&buffer, &buffer_size,
out, 7);
strcpy (out, " ");
out += 6;
col++;
} while (col % 8);
break;
}
/* otherwise, FALL THROUGH */
case ' ':
if (flags & E_TEXT_TO_HTML_CONVERT_SPACES) {
if (cur == (const guchar *) input ||
*(cur + 1) == ' ' || *(cur + 1) == '\t' ||
*(cur - 1) == '\n') {
strcpy (out, " ");
out += 6;
col++;
break;
}
}
/* otherwise, FALL THROUGH */
default:
if ((u >= 0x20 && u < 0x80) ||
(u == '\r' || u == '\t')) {
/* Default case, just copy. */
*out++ = u;
} else {
if (flags & E_TEXT_TO_HTML_ESCAPE_8BIT)
*out++ = '?';
else
out += g_snprintf(out, 9, "&#%d;", u);
}
col++;
break;
}
}
out = check_size (&buffer, &buffer_size, out, 7);
if (flags & E_TEXT_TO_HTML_PRE)
strcpy (out, "</PRE>");
else
*out = '\0';
return buffer;
}
