rtfparser.java

源码包含生成 PDF 和 HTML 的类库

//				switch(nextChar[0]) {
				switch(nextChar) {
					case '{':	// scope delimiter - Open
						this.handleOpenGroup();
						break;
					case '}':  // scope delimiter - Close
						this.handleCloseGroup();
						break;
					case 0x0a:	// noise character
					case 0x0d:	// noise character
//						if(this.isImport()) {
//							this.rtfDoc.add(new RtfDirectContent(new String(nextChar)));
//						}
						break;
					case '\\':	// Control word start delimiter
							if(parseCtrlWord(pbReader) != errOK) {
							// TODO: Indicate some type of error
							return;
						}
						break;
					default:
						if(groupLevel == 0) { // BOMs
							break;
						}
						if(this.getTokeniserState() == TOKENISER_HEX) {
							StringBuffer hexChars = new StringBuffer();
							hexChars.append(nextChar);
//							if(pbReader.read(nextChar) == -1) {
							if((nextChar = pbReader.read()) == -1) {
								return;
							}
							this.byteCount++;
							hexChars.append(nextChar);
	                    	try {
//								nextChar[0]=(char)Integer.parseInt(hexChars.toString(), 16);
								nextChar=Integer.parseInt(hexChars.toString(), 16);
							} catch (NumberFormatException e) {
								return;
							}
		                    this.setTokeniserState(TOKENISER_NORMAL);
						}
						if ((errorCode = parseChar(nextChar)) != errOK) {
                        	return; // some error occurred. we should send a
									// real error
						}
						break;
				}	// switch(nextChar[0])
			}	// end if (this.getTokeniserState() == TOKENISER_BINARY)
	        
//	        if(groupLevel < 1 && this.isImportFragment()) return; //return errOK;
//	        if(groupLevel < 0 && this.isImportFull()) return; //return errStackUnderflow;
//	        if(groupLevel < 0 && this.isConvert()) return; //return errStackUnderflow;
	        
		}// end while(reader.read(nextChar) != -1)
		RtfDestination dest = this.getCurrentDestination();
		if(dest != null) {
			dest.closeDestination();
		}
	}
	
	/**
	 * Process the character and send it to the current destination.
	 * @param nextChar
	 * 		The character to process
	 * @return
	 * 		Returns an error code or errOK if no error.
	 * @since 2.1.3
	 */
	private int parseChar(int nextChar) {
		// figure out where to put the character
		// needs to handle group levels for parsing
		// examples
		/*
		 * {\f3\froman\fcharset2\fprq2{\*\panose 05050102010706020507}Symbol;}
		 * {\f7\fswiss\fcharset0\fprq2{\*\panose 020b0604020202030204}Helv{\*\falt Arial};} <- special case!!!!
		 * {\f5\froman\fcharset0 Tahoma;}
		 * {\f6\froman\fcharset0 Arial Black;}
		 * {\info(\author name}{\company company name}}
		 * ... document text ...
		 */
	    if (this.getTokeniserState() == TOKENISER_BINARY && --binByteCount <= 0)
	    	this.setTokeniserStateNormal();
	    if (this.getTokeniserState() == TOKENISER_SKIP_BYTES && --binSkipByteCount <= 0)
	    	this.setTokeniserStateNormal();
	    return this.handleCharacter(nextChar);
	}
	
	/**
	 * Parses a keyword and it's parameter if one exists
	 * @param reader
	 * 		This is a pushback reader for file input.
	 * @return
	 * 		Returns an error code or errOK if no error.
	 * @throws IOException
	 * 		Catch any file read problem.
	 * @since 2.1.3
	 */
	private int parseCtrlWord(PushbackInputStream reader) throws IOException {
		int nextChar = 0;
		int result = errOK;
		
		if((nextChar = reader.read()) == -1) {
			return errEndOfFile;
		}
		this.byteCount++;

		StringBuffer parsedCtrlWord = new StringBuffer();
		StringBuffer parsedParam= new StringBuffer();
		RtfCtrlWordData ctrlWordParam = new RtfCtrlWordData();
		
		if(!Character.isLetterOrDigit((char)nextChar)) {
			parsedCtrlWord.append((char)nextChar);
			ctrlWordParam.ctrlWord = parsedCtrlWord.toString();
			result =  this.handleCtrlWord(ctrlWordParam);
			lastCtrlWordParam = ctrlWordParam;
			return result;
		}
		
		do {
			parsedCtrlWord.append((char)nextChar);
			//TODO: catch EOF
			nextChar = reader.read();
			this.byteCount++;
		} while  (Character.isLetter((char)nextChar));
		
		ctrlWordParam.ctrlWord = parsedCtrlWord.toString();

		if(nextChar == '-') {
			ctrlWordParam.isNeg = true;
			if((nextChar = reader.read()) == -1) {
					return errEndOfFile;
			}
			this.byteCount++;
		}
		

		if(Character.isDigit((char)nextChar)) {
			ctrlWordParam.hasParam = true;
			do {
				parsedParam.append((char)nextChar);
				//TODO: catch EOF
				nextChar = reader.read();
				this.byteCount++;
				} while  (Character.isDigit((char)nextChar));
						
			ctrlWordParam.param = parsedParam.toString();
		}
		
		// push this character back into the stream
		if(nextChar != ' ') { 
			reader.unread(nextChar);
		}
		
	    if(debugParser) {
	//	    // debug: insrsid6254399
	//	    if(ctrlWordParam.ctrlWord.equals("proptype") && ctrlWordParam.param.equals("30")) {
	//	    	System.out.print("Debug value found\n");
	//	    }
//		    if(ctrlWordParam.ctrlWord.equals("cf") ) {
//		    	System.out.print("Debug value found\n");
//		    }
	    }
	    
		result = this.handleCtrlWord(ctrlWordParam);
		lastCtrlWordParam = ctrlWordParam;
		return result;

	}
	
	/**
	 * Set the current state of the tokeniser.
	 * @param value The new state of the tokeniser.
	 * @return The state of the tokeniser.
	 * @since 2.1.3
	 */
	public int setTokeniserState(int value) {
		this.currentState.tokeniserState = value;
		return this.currentState.tokeniserState;
	}
	
	/**
	 * Get the current state of the tokeniser.
	 * @return The current state of the tokeniser.
	 * @since 2.1.3
	 */
	public int getTokeniserState() {
		return this.currentState.tokeniserState;
	}

	/**
	 * Gets the current group level
	 * 
	 * @return
	 * 		The current group level value.
	 * @since 2.1.3
	 */
	public int getLevel() {
		return this.groupLevel;
	}
	

	/**
	 * Set the tokeniser state to skip to the end of the group.
	 * Sets the state to TOKENISER_SKIP_GROUP and skipGroupLevel to the current group level.
	 * @since 2.1.3
	 */
	public void setTokeniserStateNormal() {
		this.setTokeniserState(TOKENISER_NORMAL);
	}

	/**
	 * Set the tokeniser state to skip to the end of the group.
	 * Sets the state to TOKENISER_SKIP_GROUP and skipGroupLevel to the current group level.
	 * @since 2.1.3
	 */
	public void setTokeniserStateSkipGroup() {
		this.setTokeniserState(TOKENISER_SKIP_GROUP);
		this.skipGroupLevel = this.groupLevel;
	}
	
	/**
	 * Sets the number of bytes to skip and the state of the tokeniser.
	 * 
	 * @param numberOfBytesToSkip
	 * 			The numbere of bytes to skip in the file.
	 * @since 2.1.3
	 */
	public void setTokeniserSkipBytes(long numberOfBytesToSkip) {
		this.setTokeniserState(TOKENISER_SKIP_BYTES);
		this.binSkipByteCount = numberOfBytesToSkip;
	}
	
	/**
	 * Sets the number of binary bytes.
	 * 
	 * @param binaryCount
	 * 			The number of binary bytes.
	 * @since 2.1.3
	 */
	public void setTokeniserStateBinary(int binaryCount) {
		this.setTokeniserState(TOKENISER_BINARY);
		this.binByteCount = binaryCount;
	}
	/**
	 * Sets the number of binary bytes.
	 * 
	 * @param binaryCount
	 * 			The number of binary bytes.
	 * @since 2.1.3
	 */
	public void setTokeniserStateBinary(long binaryCount) {
		this.setTokeniserState(TOKENISER_BINARY);
		this.binByteCount = binaryCount;
	}
	/**
	 * Helper method to determin if conversion is TYPE_CONVERT
	 * @return true if TYPE_CONVERT, otherwise false
	 * @see com.lowagie.text.rtf.parser.RtfParser#TYPE_CONVERT
	 * @since 2.1.3
	 */
	public boolean isConvert() {
		return (this.getConversionType() == RtfParser.TYPE_CONVERT);
	}
	
	/**
	 * Helper method to determin if conversion is TYPE_IMPORT_FULL or TYPE_IMPORT_FRAGMENT
	 * @return true if TYPE_CONVERT, otherwise false
	 * @see com.lowagie.text.rtf.parser.RtfParser#TYPE_IMPORT_FULL
	 * @see com.lowagie.text.rtf.parser.RtfParser#TYPE_IMPORT_FRAGMENT
	 * @since 2.1.3
	 */
	public boolean isImport() {
		return (isImportFull() || this.isImportFragment());
	}
	/**
	 * Helper method to determin if conversion is TYPE_IMPORT_FULL
	 * @return true if TYPE_CONVERT, otherwise false
	 * @see com.lowagie.text.rtf.parser.RtfParser#TYPE_IMPORT_FULL
	 * @since 2.1.3
	 */
	public boolean isImportFull() {
		return (this.getConversionType() == RtfParser.TYPE_IMPORT_FULL);
	}
	/**
	 * Helper method to determin if conversion is TYPE_IMPORT_FRAGMENT
	 * @return true if TYPE_CONVERT, otherwise false
	 * @see com.lowagie.text.rtf.parser.RtfParser#TYPE_IMPORT_FRAGMENT
	 * @since 2.1.3
	 */
	public boolean isImportFragment() {
		return (this.getConversionType() == RtfParser.TYPE_IMPORT_FRAGMENT);
	}
	/**
	 * Helper method to indicate if this control word was a \* control word.
	 * @return true if it was a \* control word, otherwise false
	 * @since 2.1.3
	 */
	public boolean getExtendedDestination() {
		return this.currentState.isExtendedDestination;
	}
	/**
	 * Helper method to set the extended control word flag.
	 * @param value Boolean to set the value to.
	 * @return isExtendedDestination.
	 * @since 2.1.3
	 */
	public boolean setExtendedDestination(boolean value) {
		this.currentState.isExtendedDestination = value;
		return this.currentState.isExtendedDestination;
	}

	/**
	 * Get the logfile name.
	 * 
	 * @return the logFile
	 * @since 2.1.3
	 */
	public String getLogFile() {
		return logFile;
	}

	/**
	 * Set the logFile name
	 * 
	 * @param logFile the logFile to set
	 * @since 2.1.3
	 */
	public void setLogFile(String logFile) {
		this.logFile = logFile;
	}
	/**
	 * Set the logFile name
	 * 
	 * @param logFile the logFile to set
	 * @since 2.1.3
	 */
	public void setLogFile(String logFile, boolean logAppend) {
		this.logFile = logFile;
		this.setLogAppend(logAppend);
	}

	/**
	 * Get flag indicating if logging is on or off.
	 * 
	 * @return the logging
	 * @since 2.1.3
	 */
	public boolean isLogging() {
		return logging;
	}

	/**
	 * Set flag indicating if logging is on or off
	 * @param logging <code>true</code> to turn on logging, <code>false</code> to turn off logging.
	 * @since 2.1.3
	 */
	public void setLogging(boolean logging) {
		this.logging = logging;
	}

	/**
	 * @return the logAppend
	 * @since 2.1.3
	 */
	public boolean isLogAppend() {
		return logAppend;
	}

	/**
	 * @param logAppend the logAppend to set
	 * @since 2.1.3
	 */
	public void setLogAppend(boolean logAppend) {
		this.logAppend = logAppend;
	}

/*	
 *	Statistics
 *
 	public void printStats(PrintStream out) {
		if(out == null) return;
		
		out.println("");
		out.println("Parser statistics:");
		out.println("Process start date: " + startDate.toLocaleString());
		out.println("Process end date  : " + endDate.toLocaleString());
		out.println("  Elapsed time    : " + Long.toString(endTime - startTime) + " milliseconds.");
		out.println("Total bytes read  : " + Long.toString(byteCount));
		out.println("Open group count  : " + Long.toString(openGroupCount));
		out.print("Close group count : " + Long.toString(closeGroupCount));
		out.println(" (Groups Skipped): " + Long.toString(groupSkippedCount));
		out.print("Control word count: " + Long.toString(ctrlWordCount));
		out.print(" - Handled: " + Long.toString(ctrlWordHandledCount));
		out.print(" Not Handled: " + Long.toString(ctrlWordNotHandledCount));
		out.println(" Skipped: " + Long.toString(ctrlWordSkippedCount));
		out.println("Plain text char count: " + Long.toString(characterCount));		
	}*/
}