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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef ____nstxttohtmlconv___h___
#define ____nstxttohtmlconv___h___
#include "nsITXTToHTMLConv.h"
#include "nsCOMPtr.h"
#include "nsTArray.h"
#include "nsString.h"
#define NS_NSTXTTOHTMLCONVERTER_CID \
{ /* 9ef9fa14-1dd1-11b2-9d65-d72d6d1f025e */ \
0x9ef9fa14, \
0x1dd1, \
0x11b2, \
{0x9d, 0x65, 0xd7, 0x2d, 0x6d, 0x1f, 0x02, 0x5e} \
}
// Internal representation of a "token"
typedef struct convToken {
nsString token; // the actual string (i.e. "http://")
nsString modText; // replacement text or href prepend text.
bool prepend; // flag indicating how the modText should be used.
} convToken;
template<class T> class nsAutoPtr;
/**
* Convert plain text to HTML.
*
* OVERVIEW OF HOW THIS CLASS WORKS:
*
* This class stores an array of tokens that should be replaced by something,
* or something that should be prepended.
* The "token" member of convToken is the text to search for. This is a
* substring of the desired token. Tokens are delimited by TOKEN_DELIMITERS.
* That entire token will be replaced by modText (if prepend is false); or it
* will be linkified and modText will be prepended to the token if prepend is
* true.
*
* Note that all of the text will be in a preformatted block, so there is no
* need to emit line-end tags, or set the font face to monospace.
*
* This works as a stream converter, so data will arrive by
* OnStartRequest/OnDataAvailable/OnStopRequest calls.
*
* OStopR will possibly process a remaining token.
*
* If the data of one pass contains a part of a token, that part will be stored
* in mBuffer. The rest of the data will be sent to the next listener.
*
* XXX this seems suboptimal. this means that this design will only work for
* links. and it is impossible to append anything to the token. this means that,
* for example, making *foo* bold is not possible.
*/
class nsTXTToHTMLConv : public nsITXTToHTMLConv {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSISTREAMCONVERTER
NS_DECL_NSITXTTOHTMLCONV
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
nsTXTToHTMLConv();
nsresult Init();
protected:
virtual ~nsTXTToHTMLConv();
// return the token and it's location in the underlying buffer.
int32_t FindToken(int32_t cursor, convToken* *_retval);
// return the cursor location after munging HTML into the
// underlying buffer, according to mToken
int32_t CatHTML(int32_t front, int32_t back);
nsCOMPtr<nsIStreamListener> mListener; // final listener (consumer)
nsString mBuffer; // any carry over data
nsTArray<nsAutoPtr<convToken> > mTokens; // list of tokens to search for
convToken *mToken; // current token (if any)
nsString mPageTitle; // Page title
bool mPreFormatHTML; // Whether to use <pre> tags
};
#endif // ____nstxttohtmlconv___h___
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