/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ /* * nsIContentSerializer implementation that can be used with an * nsIDocumentEncoder to convert a DOM into plaintext in a nice way * (eg for copy/paste as plaintext). */ #ifndef nsPlainTextSerializer_h__ #define nsPlainTextSerializer_h__ #include "nsIContentSerializer.h" #include "nsIHTMLContentSink.h" #include "nsHTMLTags.h" #include "nsCOMPtr.h" #include "nsString.h" #include "nsILineBreaker.h" #include "nsIContent.h" #include "nsIAtom.h" #include "nsIHTMLToTextSink.h" #include "nsIDocumentEncoder.h" #include "nsVoidArray.h" class nsPlainTextSerializer : public nsIContentSerializer, public nsIHTMLContentSink, public nsIHTMLToTextSink { public: nsPlainTextSerializer(); virtual ~nsPlainTextSerializer(); NS_DECL_ISUPPORTS // nsIContentSerializer NS_IMETHOD Init(PRUint32 flags, PRUint32 aWrapColumn, const char* aCharSet, PRBool aIsCopying, PRBool aIsWholeDocument); NS_IMETHOD AppendText(nsIDOMText* aText, PRInt32 aStartOffset, PRInt32 aEndOffset, nsAString& aStr); NS_IMETHOD AppendCDATASection(nsIDOMCDATASection* aCDATASection, PRInt32 aStartOffset, PRInt32 aEndOffset, nsAString& aStr); NS_IMETHOD AppendProcessingInstruction(nsIDOMProcessingInstruction* aPI, PRInt32 aStartOffset, PRInt32 aEndOffset, nsAString& aStr) { return NS_OK; } NS_IMETHOD AppendComment(nsIDOMComment* aComment, PRInt32 aStartOffset, PRInt32 aEndOffset, nsAString& aStr) { return NS_OK; } NS_IMETHOD AppendDoctype(nsIDOMDocumentType *aDoctype, nsAString& aStr) { return NS_OK; } NS_IMETHOD AppendElementStart(nsIDOMElement *aElement, nsIDOMElement *aOriginalElement, nsAString& aStr); NS_IMETHOD AppendElementEnd(nsIDOMElement *aElement, nsAString& aStr); NS_IMETHOD Flush(nsAString& aStr); NS_IMETHOD AppendDocumentStart(nsIDOMDocument *aDocument, nsAString& aStr); // nsIContentSink NS_IMETHOD WillTokenize(void) { return NS_OK; } NS_IMETHOD WillBuildModel(void) { return NS_OK; } NS_IMETHOD DidBuildModel(void) { return NS_OK; } NS_IMETHOD WillInterrupt(void) { return NS_OK; } NS_IMETHOD WillResume(void) { return NS_OK; } NS_IMETHOD SetParser(nsIParser* aParser) { return NS_OK; } NS_IMETHOD OpenContainer(const nsIParserNode& aNode); NS_IMETHOD CloseContainer(const nsHTMLTag aTag); NS_IMETHOD AddLeaf(const nsIParserNode& aNode); NS_IMETHOD AddComment(const nsIParserNode& aNode) { return NS_OK; } NS_IMETHOD AddProcessingInstruction(const nsIParserNode& aNode) { return NS_OK; } NS_IMETHOD AddDocTypeDecl(const nsIParserNode& aNode) { return NS_OK; } virtual void FlushPendingNotifications(mozFlushType aType) { } NS_IMETHOD SetDocumentCharset(nsACString& aCharset) { return NS_OK; } virtual nsISupports *GetTarget() { return nsnull; } // nsIHTMLContentSink NS_IMETHOD OpenHead(); NS_IMETHOD IsEnabled(PRInt32 aTag, PRBool* aReturn); NS_IMETHOD NotifyTagObservers(nsIParserNode* aNode) { return NS_OK; } NS_IMETHOD_(PRBool) IsFormOnStack() { return PR_FALSE; } NS_IMETHOD BeginContext(PRInt32 aPosition) { return NS_OK; } NS_IMETHOD EndContext(PRInt32 aPosition) { return NS_OK; } NS_IMETHOD WillProcessTokens(void) { return NS_OK; } NS_IMETHOD DidProcessTokens(void) { return NS_OK; } NS_IMETHOD WillProcessAToken(void) { return NS_OK; } NS_IMETHOD DidProcessAToken(void) { return NS_OK; } // nsIHTMLToTextSink NS_IMETHOD Initialize(nsAString* aOutString, PRUint32 aFlags, PRUint32 aWrapCol); protected: nsresult GetAttributeValue(const nsIParserNode* node, nsIAtom* aName, nsString& aValueRet); void AddToLine(const PRUnichar* aStringToAdd, PRInt32 aLength); void EndLine(PRBool softlinebreak); void EnsureVerticalSpace(PRInt32 noOfRows); void FlushLine(); void OutputQuotesAndIndent(PRBool stripTrailingSpaces=PR_FALSE); void Output(nsString& aString); void Write(const nsAString& aString); PRBool IsBlockLevel(PRInt32 aId); PRBool IsContainer(PRInt32 aId); PRBool IsInPre(); PRBool IsInOL(); PRBool IsCurrentNodeConverted(const nsIParserNode* aNode); static PRInt32 GetIdForContent(nsIContent* aContent); nsresult DoOpenContainer(const nsIParserNode* aNode, PRInt32 aTag); nsresult DoCloseContainer(PRInt32 aTag); nsresult DoAddLeaf(const nsIParserNode* aNode, PRInt32 aTag, const nsAString& aText); // Inlined functions inline PRBool MayWrap() { return mWrapColumn && ((mFlags & nsIDocumentEncoder::OutputFormatted) || (mFlags & nsIDocumentEncoder::OutputWrap)); } inline PRBool DoOutput() { return mHeadLevel == 0; } // Stack handling functions PRBool GetLastBool(const nsVoidArray& aStack); void SetLastBool(nsVoidArray& aStack, PRBool aValue); void PushBool(nsVoidArray& aStack, PRBool aValue); PRBool PopBool(nsVoidArray& aStack); protected: nsString mCurrentLine; PRUint32 mHeadLevel; PRPackedBool mAtFirstColumn; // Handling of quoted text (for mail): // Quotes need to be wrapped differently from non-quoted text, // because quoted text has a few extra characters (e.g. ">> ") // which makes the line length longer. // Mail can represent quotes in different ways: it can wrap // quotes in a 
 (if editor.quotesPreformatted is set),
  // or not wrapped in any special tag (if mail.compose.wrap_to_window_width)
  // or in a  (if neither of the above are set).
  PRPackedBool     mQuotesPreformatted; // expect quotes wrapped in 
  PRPackedBool     mDontWrapAnyQuotes;  // no special quote markers

  PRPackedBool     mStructs;            // Output structs (pref)

  // If we've just written out a cite blockquote, we need to remember it
  // so we don't duplicate spaces before a 
 (which mail uses to quote
  // old messages).
  PRPackedBool     mHasWrittenCiteBlockquote;

  PRInt32          mIndent;
  // mInIndentString keeps a header that has to be written in the indent.
  // That could be, for instance, the bullet in a bulleted list.
  nsString         mInIndentString;
  PRInt32          mCiteQuoteLevel;
  PRInt32          mFlags;
  PRInt32          mFloatingLines; // To store the number of lazy line breaks

  // The wrap column is how many standard sized chars (western languages)
  // should be allowed on a line. There could be less chars if the chars
  // are wider than latin chars of more if the chars are more narrow.
  PRUint32         mWrapColumn;

  // The width of the line as it will appear on the screen (approx.) 
  PRUint32         mCurrentLineWidth; 

  // Treat quoted text as though it's preformatted -- don't wrap it.
  // Having it on a pref is a temporary measure, See bug 69638.
  PRInt32          mSpanLevel;


  PRInt32          mEmptyLines; // Will be the number of empty lines before
                                // the current. 0 if we are starting a new
                                // line and -1 if we are in a line.

  PRPackedBool     mInWhitespace;
  PRPackedBool     mPreFormatted;
  PRPackedBool     mStartedOutput; // we've produced at least a character

  // While handling a new tag, this variable should remind if any line break
  // is due because of a closing tag. Setting it to "TRUE" while closing the tags.
  // Hence opening tags are guaranteed to start with appropriate line breaks.
  PRPackedBool     mLineBreakDue; 

  nsString         mURL;
  PRInt32          mHeaderStrategy;    /* Header strategy (pref)
                                          0 = no indention
                                          1 = indention, increased with
                                              header level (default)
                                          2 = numbering and slight indention */
  PRInt32          mHeaderCounter[7];  /* For header-numbering:
                                          Number of previous headers of
                                          the same depth and in the same
                                          section.
                                          mHeaderCounter[1] for 
 etc. */

  nsCOMPtr mContent;

  // For handling table rows
  nsAutoVoidArray mHasWrittenCellsForRow; // really an array of bools
  
  // Values gotten in OpenContainer that is (also) needed in CloseContainer
  nsAutoVoidArray     mCurrentNodeIsConverted; // really an array of bools
  nsAutoVoidArray     mIsInCiteBlockquote; // really an array of bools

  // The output data
  nsAString*            mOutputString;

  // The tag stack: the stack of tags we're operating on, so we can nest:
  nsHTMLTag       *mTagStack;
  PRUint32         mTagStackIndex;

  // Content in the stack above this index should be ignored:
  PRUint32          mIgnoreAboveIndex;

  // The stack for ordered lists:
  PRInt32         *mOLStack;
  PRUint32         mOLStackIndex;

  PRUint32         mULCount;

  nsString                     mLineBreak;
  nsCOMPtr     mLineBreaker;

  // Conveniance constant. It would be nice to have it as a const static
  // variable, but that causes issues with OpenBSD and module unloading.
  const nsString          kSpace;
};

nsresult
NS_NewPlainTextSerializer(nsIContentSerializer** aSerializer);

#endif