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