зеркало из https://github.com/mozilla/gecko-dev.git
327 строки
13 KiB
C++
327 строки
13 KiB
C++
/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla Text to HTML converter code.
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*
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* The Initial Developer of the Original Code is
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* Ben Bucksch <http://www.bucksch.org>.
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* Portions created by the Initial Developer are Copyright (C) 1999, 2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/**
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Description: Currently only functions to enhance plain text with HTML tags. See mozITXTToHTMLConv. Stream conversion is defunct.
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*/
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#ifndef _mozTXTToHTMLConv_h__
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#define _mozTXTToHTMLConv_h__
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#include "mozITXTToHTMLConv.h"
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#include "nsIIOService.h"
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#include "nsString.h"
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#include "nsCOMPtr.h"
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class mozTXTToHTMLConv : public mozITXTToHTMLConv
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{
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//////////////////////////////////////////////////////////
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public:
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//////////////////////////////////////////////////////////
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mozTXTToHTMLConv();
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virtual ~mozTXTToHTMLConv();
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NS_DECL_ISUPPORTS
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NS_DECL_MOZITXTTOHTMLCONV
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NS_DECL_NSIREQUESTOBSERVER
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NS_DECL_NSISTREAMLISTENER
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NS_DECL_NSISTREAMCONVERTER
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/**
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see mozITXTToHTMLConv::ScanTXT
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*/
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void ScanTXT(const PRUnichar * aInString, PRInt32 aInStringLength, PRUint32 whattodo, nsString& aOutString);
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/**
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see mozITXTToHTMLConv::ScanHTML. We will modify aInString potentially...
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*/
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void ScanHTML(nsString& aInString, PRUint32 whattodo, nsString &aOutString);
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/**
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see mozITXTToHTMLConv::CiteLevelTXT
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*/
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PRInt32 CiteLevelTXT(const PRUnichar * line,PRUint32& logLineStart);
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//////////////////////////////////////////////////////////
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protected:
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//////////////////////////////////////////////////////////
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nsCOMPtr<nsIIOService> mIOService; // for performance reasons, cache the netwerk service...
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/**
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Completes<ul>
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<li>Case 1: mailto: "mozilla@bucksch.org" -> "mailto:mozilla@bucksch.org"
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<li>Case 2: http: "www.mozilla.org" -> "http://www.mozilla.org"
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<li>Case 3: ftp: "ftp.mozilla.org" -> "ftp://www.mozilla.org"
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</ul>
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It does no check, if the resulting URL is valid.
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@param text (in): abbreviated URL
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@param pos (in): position of "@" (case 1) or first "." (case 2 and 3)
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@return Completed URL at success and empty string at failure
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*/
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void CompleteAbbreviatedURL(const PRUnichar * aInString, PRInt32 aInLength,
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const PRUint32 pos, nsString& aOutString);
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//////////////////////////////////////////////////////////
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private:
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//////////////////////////////////////////////////////////
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enum LIMTYPE
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{
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LT_IGNORE, // limitation not checked
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LT_DELIMITER, // not alphanumeric and not rep[0]. End of text is also ok.
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LT_ALPHA, // alpha char
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LT_DIGIT
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};
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/**
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@param text (in): the string to search through.<p>
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If before = IGNORE,<br>
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rep is compared starting at 1. char of text (text[0]),<br>
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else starting at 2. char of text (text[1]).
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Chars after "after"-delimiter are ignored.
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@param rep (in): the string to look for
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@param aRepLen (in): the number of bytes in the string to look for
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@param before (in): limitation before rep
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@param after (in): limitation after rep
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@return true, if rep is found and limitation spec is met or rep is empty
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*/
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PRBool ItMatchesDelimited(const PRUnichar * aInString, PRInt32 aInLength,
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const PRUnichar * rep, PRInt32 aRepLen, LIMTYPE before, LIMTYPE after);
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/**
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@param see ItMatchesDelimited
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@return Number of ItMatchesDelimited in text
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*/
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PRUint32 NumberOfMatches(const PRUnichar * aInString, PRInt32 aInStringLength,
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const PRUnichar* rep, PRInt32 aRepLen, LIMTYPE before, LIMTYPE after);
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/**
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Currently only changes "<", ">" and "&". All others stay as they are.<p>
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"Char" in function name to avoid side effects with nsString(ch)
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constructors.
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@param ch (in)
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@param aStringToAppendto (out) - the string to append the escaped
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string to.
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@param inAttribute (in) - will escape quotes, too (which is
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only needed for attribute values)
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*/
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void EscapeChar(const PRUnichar ch, nsString& aStringToAppendto,
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PRBool inAttribute);
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/**
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See EscapeChar. Escapes the string in place.
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*/
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void EscapeStr(nsString& aInString, PRBool inAttribute);
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/**
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Currently only reverts "<", ">" and "&". All others stay as they are.<p>
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@param aInString (in) HTML string
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@param aStartPos (in) start index into the buffer
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@param aLength (in) length of the buffer
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@param aOutString (out) unescaped buffer
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*/
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void UnescapeStr(const PRUnichar * aInString, PRInt32 aStartPos,
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PRInt32 aLength, nsString& aOutString);
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/**
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<em>Note</em>: I use different strategies to pass context between the
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functions (full text and pos vs. cutted text and col0, glphyTextLen vs.
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replaceBefore/-After). It makes some sense, but is hard to understand
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(maintain) :-(.
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*/
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/**
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<p><em>Note:</em> replaceBefore + replaceAfter + 1 (for char at pos) chars
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in text should be replaced by outputHTML.</p>
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<p><em>Note:</em> This function should be able to process a URL on multiple
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lines, but currently, ScanForURLs is called for every line, so it can't.</p>
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@param text (in): includes possibly a URL
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@param pos (in): position in text, where either ":", "." or "@" are found
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@param whathasbeendone (in): What the calling ScanTXT did/has to do with the
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(not-linkified) text, i.e. usually the "whattodo" parameter.
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(Needed to calculate replaceBefore.) NOT what will be done with
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the content of the link.
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@param outputHTML (out): URL with HTML-a tag
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@param replaceBefore (out): Number of chars of URL before pos
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@param replaceAfter (out): Number of chars of URL after pos
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@return URL found
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*/
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PRBool FindURL(const PRUnichar * aInString, PRInt32 aInLength, const PRUint32 pos,
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const PRUint32 whathasbeendone,
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nsString& outputHTML, PRInt32& replaceBefore, PRInt32& replaceAfter);
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enum modetype {
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unknown,
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RFC1738, /* Check, if RFC1738, APPENDIX compliant,
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like "<URL:http://www.mozilla.org>". */
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RFC2396E, /* RFC2396, APPENDIX E allows anglebrackets (like
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"<http://www.mozilla.org>") (without "URL:") or
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quotation marks(like ""http://www.mozilla.org"").
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Also allow email addresses without scheme,
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e.g. "<mozilla@bucksch.org>" */
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freetext, /* assume heading scheme
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with "[a-zA-Z][a-zA-Z0-9+\-\.]*:" like "news:"
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(see RFC2396, Section 3.1).
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Certain characters (see code) or any whitespace
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(including linebreaks) end the URL.
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Other certain (punctation) characters (see code)
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at the end are stripped off. */
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abbreviated /* Similar to freetext, but without scheme, e.g.
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"www.mozilla.org", "ftp.mozilla.org" and
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"mozilla@bucksch.org". */
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/* RFC1738 and RFC2396E type URLs may use multiple lines,
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whitespace is stripped. Special characters like ")" stay intact.*/
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};
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/**
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* @param text (in), pos (in): see FindURL
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* @param check (in): Start must be conform with this mode
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* @param start (out): Position in text, where URL (including brackets or
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* similar) starts
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* @return |check|-conform start has been found
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*/
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PRBool FindURLStart(const PRUnichar * aInString, PRInt32 aInLength, const PRUint32 pos,
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const modetype check, PRUint32& start);
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/**
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* @param text (in), pos (in): see FindURL
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* @param check (in): End must be conform with this mode
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* @param start (in): see FindURLStart
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* @param end (out): Similar to |start| param of FindURLStart
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* @return |check|-conform end has been found
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*/
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PRBool FindURLEnd(const PRUnichar * aInString, PRInt32 aInStringLength, const PRUint32 pos,
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const modetype check, const PRUint32 start, PRUint32& end);
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/**
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* @param text (in), pos (in), whathasbeendone (in): see FindURL
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* @param check (in): Current mode
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* @param start (in), end (in): see FindURLEnd
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* @param txtURL (out): Guessed (raw) URL.
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* Without whitespace, but not completed.
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* @param desc (out): Link as shown to the user, but already escaped.
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* Should be placed between the <a> and </a> tags.
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* @param replaceBefore(out), replaceAfter (out): see FindURL
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*/
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void CalculateURLBoundaries(const PRUnichar * aInString, PRInt32 aInStringLength,
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const PRUint32 pos, const PRUint32 whathasbeendone,
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const modetype check, const PRUint32 start, const PRUint32 end,
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nsString& txtURL, nsString& desc,
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PRInt32& replaceBefore, PRInt32& replaceAfter);
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/**
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* @param txtURL (in), desc (in): see CalculateURLBoundaries
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* @param outputHTML (out): see FindURL
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* @return A valid URL could be found (and creation of HTML successful)
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*/
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PRBool CheckURLAndCreateHTML(
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const nsString& txtURL, const nsString& desc, const modetype mode,
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nsString& outputHTML);
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/**
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@param text (in): line of text possibly with tagTXT.<p>
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if col0 is true,
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starting with tagTXT<br>
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else
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starting one char before tagTXT
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@param col0 (in): tagTXT is on the beginning of the line (or paragraph).
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open must be 0 then.
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@param tagTXT (in): Tag in plaintext to search for, e.g. "*"
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@param aTagTxtLen (in): length of tagTXT.
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@param tagHTML (in): HTML-Tag to replace tagTXT with,
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without "<" and ">", e.g. "strong"
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@param attributeHTML (in): HTML-attribute to add to opening tagHTML,
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e.g. "class=txt_star"
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@param aOutString: string to APPEND the converted html into
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@param open (in/out): Number of currently open tags of type tagHTML
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@return Conversion succeeded
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*/
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PRBool StructPhraseHit(const PRUnichar * aInString, PRInt32 aInStringLength, PRBool col0,
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const PRUnichar* tagTXT,
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PRInt32 aTagTxtLen,
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const char* tagHTML, const char* attributeHTML,
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nsString& aOutputString, PRUint32& openTags);
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/**
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@param text (in), col0 (in): see GlyphHit
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@param tagTXT (in): Smily, see also StructPhraseHit
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@param imageName (in): the basename of the file that contains the image for this smilie
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@param outputHTML (out): new string containing the html for the smily
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@param glyphTextLen (out): see GlyphHit
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*/
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PRBool
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SmilyHit(const PRUnichar * aInString, PRInt32 aLength, PRBool col0,
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const char* tagTXT, const char* imageName,
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nsString& outputHTML, PRInt32& glyphTextLen);
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/**
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Checks, if we can replace some chars at the start of line with prettier HTML
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code.<p>
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If success is reported, replace the first glyphTextLen chars with outputHTML
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@param text (in): line of text possibly with Glyph.<p>
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If col0 is true,
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starting with Glyph <br><!-- (br not part of text) -->
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else
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starting one char before Glyph
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@param col0 (in): text starts at the beginning of the line (or paragraph)
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@param aOutString (out): APPENDS html for the glyph to this string
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@param glyphTextLen (out): Length of original text to replace
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@return see StructPhraseHit
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*/
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PRBool GlyphHit(const PRUnichar * aInString, PRInt32 aInLength, PRBool col0,
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nsString& aOutString, PRInt32& glyphTextLen);
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/**
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Check if a given url should be linkified.
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@param aURL (in): url to be checked on.
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*/
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PRBool ShouldLinkify(const nsCString& aURL);
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};
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// It's said, that Win32 and Mac don't like static const members
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const PRInt32 mozTXTToHTMLConv_lastMode = 4;
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// Needed (only) by mozTXTToHTMLConv::FindURL
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const PRInt32 mozTXTToHTMLConv_numberOfModes = 4; // dito; unknown not counted
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#endif
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