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Diffstat (limited to 'e-util/e-html-utils.c')
| -rw-r--r-- | e-util/e-html-utils.c | 417 |
1 files changed, 0 insertions, 417 deletions
diff --git a/e-util/e-html-utils.c b/e-util/e-html-utils.c deleted file mode 100644 index 7593bb967e..0000000000 --- a/e-util/e-html-utils.c +++ /dev/null @@ -1,417 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* e-html-utils.c - * Copyright (C) 2000 Ximian, Inc. - * Author: Dan Winship <danw@ximian.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 url 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, 3, 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 - _ */ - 3, 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, 3, 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 - * - * - E_TEXT_TO_HTML_CITE: quote the text with "> " at the start of each - * line. - **/ -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>"); - - 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); - - out = check_size (&buffer, &buffer_size, out, 25); - out += sprintf (out, "%s", font); - colored = TRUE; - } - } else if (colored) { - 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 (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, "<"); - 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 unsigned char *)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; -} - -char * -e_text_to_html (const char *input, unsigned int flags) -{ - return e_text_to_html_full (input, flags, 0); -} |