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Diffstat (limited to 'e-util/e-html-utils.c')
| -rw-r--r-- | e-util/e-html-utils.c | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/e-util/e-html-utils.c b/e-util/e-html-utils.c deleted file mode 100644 index e63b233676..0000000000 --- a/e-util/e-html-utils.c +++ /dev/null @@ -1,252 +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 "e-html-utils.h" -#include <ctype.h> -#include <stdio.h> -#include <string.h> -#include <glib.h> -#include <unicode.h> - -static char * -check_size (char **buffer, int *buffer_size, char *out, int len) -{ - if (out + len > *buffer + *buffer_size) { - int index = out - *buffer; - - *buffer_size *= 2; - *buffer = g_realloc (*buffer, *buffer_size); - out = *buffer + index; - } - return out; -} - -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 && strchr (",.!?;:>)", *(end - 1))) - end--; - - if (check) { - /* Make sure we weren't fooled. */ - p = memchr (*text, ':', end - *text); - if (!p || end - p < 3) - return NULL; - } - - out = g_strndup (*text, end - *text); - *text = end; - return out; -} - -/** - * e_text_to_html: - * @input: a NUL-terminated input buffer - * @flags: some combination of the E_TEXT_TO_HTML_* flags defined - * in e-html-utils.h - * - * 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. - **/ -char * -e_text_to_html (const char *input, unsigned int flags) -{ - const unsigned char *cur = input; - char *buffer = NULL; - char *out = NULL; - int buffer_size = 0, col; - - /* 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 = input; cur && *cur; cur = unicode_next_utf8 (cur)) { - unicode_char_t u; - - unicode_get_utf8 (cur, &u); - if (unicode_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) && - unicode_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; - unicode_get_utf8 (cur, &u); - } - if (u == (unicode_char_t)-1) { - /* Sigh. Someone sent undeclared 8-bit data. - * Assume it's iso-8859-1. - */ - u = *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; - 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 unsigned char *)input || - *(cur + 1) == ' ' || *(cur + 1) == '\t') { - 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 { - 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; -} |