aboutsummaryrefslogtreecommitdiffstats
path: root/e-util/e-html-utils.c
diff options
context:
space:
mode:
Diffstat (limited to 'e-util/e-html-utils.c')
-rw-r--r--e-util/e-html-utils.c410
1 files changed, 0 insertions, 410 deletions
diff --git a/e-util/e-html-utils.c b/e-util/e-html-utils.c
deleted file mode 100644
index 6d3eaebcc9..0000000000
--- a/e-util/e-html-utils.c
+++ /dev/null
@@ -1,410 +0,0 @@
-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
-/* e-html-utils.c
- * Copyright (C) 2000 Helix Code, Inc.
- * Author: Dan Winship <danw@helixcode.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#include <ctype.h>
-#include <stdio.h>
-#include <string.h>
-#include <glib.h>
-#include <gal/unicode/gunicode.h>
-
-#include "e-html-utils.h"
-
-static char *
-check_size (char **buffer, int *buffer_size, char *out, int len)
-{
- if (out + len + 1> *buffer + *buffer_size) {
- int index = out - *buffer;
-
- *buffer_size = MAX (index + len + 1, *buffer_size * 2);
- *buffer = g_realloc (*buffer, *buffer_size);
- out = *buffer + index;
- }
- return out;
-}
-
-/* 1 = non-email-address chars: ()<>@,;:\"[] */
-/* 2 = trailing garbage: ,.!?;:>)]}`'-_ */
-static int special_chars[] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* nul - 0x0f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 - 0x1f */
- 1, 2, 1, 0, 0, 0, 0, 2, 1, 3, 0, 0, 3, 2, 2, 0, /* sp - / */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 3, 1, 0, 3, 2, /* 0 - ? */
- 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ - O */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 3, 0, 2, /* P - _ */
- 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* ` - o */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0 /* p - del */
-};
-
-#define is_addr_char(c) (isprint (c) && !(special_chars[c] & 1))
-#define is_trailing_garbage(c) (!isprint(c) || (special_chars[c] & 2))
-
-static char *
-url_extract (const unsigned char **text, gboolean check)
-{
- const unsigned char *end = *text, *p;
- char *out;
-
- while (*end && !isspace (*end) && (*end != '"') && (*end < 0x80))
- end++;
-
- /* Back up if we probably went too far. */
- while (end > *text && is_trailing_garbage (*(end - 1)))
- end--;
-
- if (check) {
- /* Make sure we weren't fooled. */
- p = memchr (*text, ':', end - *text);
- if (!p || end - p < 4)
- return NULL;
- }
-
- out = g_strndup (*text, end - *text);
- *text = end;
- return out;
-}
-
-static char *
-email_address_extract (const unsigned char **cur, char **out, const unsigned char *linestart)
-{
- const unsigned char *start, *end, *dot;
- char *addr;
-
- /* *cur points to the '@'. Look backward for a valid local-part */
- for (start = *cur; start - 1 >= linestart && is_addr_char (*(start - 1)); start--)
- ;
- if (start == *cur)
- return NULL;
-
- /* Now look forward for a valid domain part */
- for (end = *cur + 1, dot = NULL; is_addr_char (*end); end++) {
- if (*end == '.' && !dot)
- dot = end;
- }
- if (!dot)
- return NULL;
-
- /* Remove trailing garbage */
- while (is_trailing_garbage (*(end - 1)))
- end--;
- if (dot > end)
- return NULL;
-
- addr = g_strndup (start, end - start);
- *out -= *cur - start;
- *cur = end;
-
- return addr;
-}
-
-static gboolean
-is_citation (const unsigned char *c, gboolean saw_citation)
-{
- gunichar u;
- gint i;
-
- /* A line that starts with a ">" is a citation, unless it's
- * just mbox From-mangling...
- */
- if (*c == '>') {
- const unsigned char *p;
-
- if (strncmp (c, ">From ", 6) != 0)
- return TRUE;
-
- /* If the previous line was a citation, then say this
- * one is too.
- */
- if (saw_citation)
- return TRUE;
-
- /* Same if the next line is */
- p = (const unsigned char *)strchr ((const char *)c, '\n');
- if (p && *++p == '>')
- return TRUE;
-
- /* Otherwise, it was just an isolated ">From" line. */
- return FALSE;
- }
-
- /* Check for "Rupert> " and the like... */
- for (i = 0; c && *c && g_unichar_validate (g_utf8_get_char (c)) && *c != '\n' && i < 10; i ++, c = g_utf8_next_char (c)) {
- u = g_utf8_get_char (c);
- if (u == '>')
- return TRUE;
- if (!g_unichar_isalnum (u))
- return FALSE;
- }
- return FALSE;
-}
-
-/**
- * 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
- **/
-char *
-e_text_to_html_full (const char *input, unsigned int flags, guint32 color)
-{
- const unsigned char *cur, *next, *linestart;
- char *buffer = NULL;
- char *out = NULL;
- int 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>\n");
-
- col = 0;
-
- for (cur = linestart = 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);
-
- check_size (&buffer, &buffer_size, out, 25);
- out += sprintf (out, "%s", font);
- colored = TRUE;
- }
- } else if (colored) {
- gchar *no_font = "</FONT>";
-
- 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++;
- }
-
- u = g_utf8_get_char (cur);
- if (g_unichar_isalpha (u) &&
- (flags & E_TEXT_TO_HTML_CONVERT_URLS)) {
- char *tmpurl = NULL, *refurl = NULL, *dispurl = NULL;
-
- if (!strncasecmp (cur, "http://", 7) ||
- !strncasecmp (cur, "https://", 8) ||
- !strncasecmp (cur, "ftp://", 6) ||
- !strncasecmp (cur, "nntp://", 7) ||
- !strncasecmp (cur, "mailto:", 7) ||
- !strncasecmp (cur, "news:", 5)) {
- tmpurl = url_extract (&cur, TRUE);
- if (tmpurl) {
- refurl = e_text_to_html (tmpurl, 0);
- dispurl = g_strdup (refurl);
- }
- } else if (!strncasecmp (cur, "www.", 4) &&
- (*(cur + 4) < 0x80) &&
- g_unichar_isalnum (*(cur + 4))) {
- tmpurl = url_extract (&cur, FALSE);
- 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 (cur);
- }
-
- if (u == '@' && (flags & E_TEXT_TO_HTML_CONVERT_ADDRESSES)) {
- char *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);
-
- u = g_utf8_get_char (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 = g_utf8_next_char (cur);
-
- out = check_size (&buffer, &buffer_size, out, 10);
-
- switch (u) {
- case '<':
- strcpy (out, "&lt;");
- out += 4;
- col++;
- break;
-
- case '>':
- strcpy (out, "&gt;");
- out += 4;
- col++;
- break;
-
- case '&':
- strcpy (out, "&amp;");
- out += 5;
- col++;
- break;
-
- case '"':
- strcpy (out, "&quot;");
- 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, "&nbsp;");
- out += 6;
- col++;
- } while (col % 8);
- break;
- }
- /* otherwise, FALL THROUGH */
-
- case ' ':
- if (flags & E_TEXT_TO_HTML_CONVERT_SPACES) {
- if (cur == (const unsigned char *)input ||
- *(cur + 1) == ' ' || *(cur + 1) == '\t') {
- strcpy (out, "&nbsp;");
- 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;
-}
-
-char *
-e_text_to_html (const char *input, unsigned int flags)
-{
- return e_text_to_html_full (input, flags, 0);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 03:02:46 +0800