textrun.java

java 读写word excel ppt

			} else {
				// Need to swap a TextBytesAtom for a TextCharsAtom
				
				// Build the new TextCharsAtom
				_charAtom = new TextCharsAtom();
				_charAtom.setText(s);
				
				// Use the TextHeaderAtom to do the swap on the parent
				RecordContainer parent = _headerAtom.getParentRecord();
				Record[] cr = parent.getChildRecords();
				for(int i=0; i<cr.length; i++) {
					// Look for TextBytesAtom
					if(cr[i].equals(_byteAtom)) {
						// Found it, so replace, then all done
						cr[i] = _charAtom;
						break;
					}
				}
				
				// Flag the change
				_byteAtom = null;
				_isUnicode = true;
			}
		}
	}
	
	/**
	 * Handles an update to the text stored in one of the Rich Text Runs
	 * @param run
	 * @param s
	 */
	public synchronized void changeTextInRichTextRun(RichTextRun run, String s) {
		// Figure out which run it is
		int runID = -1;
		for(int i=0; i<_rtRuns.length; i++) {
			if(run.equals(_rtRuns[i])) {
				runID = i;
			}
		}
		if(runID == -1) {
			throw new IllegalArgumentException("Supplied RichTextRun wasn't from this TextRun");
		}
		
		// Ensure a StyleTextPropAtom is present, adding if required
		ensureStyleAtomPresent();
		
		// Update the text length for its Paragraph and Character stylings
		// If it's shared:
		//   * calculate the new length based on the run's old text
		//   * this should leave in any +1's for the end of block if needed
		// If it isn't shared:
		//   * reset the length, to the new string's length
		//   * add on +1 if the last block
		// The last run needs its stylings to be 1 longer than the raw
		//  text is. This is to define the stylings that any new text
		//  that is added will inherit
		TextPropCollection pCol = run._getRawParagraphStyle();
		TextPropCollection cCol = run._getRawCharacterStyle();
		int newSize = s.length();
		if(runID == _rtRuns.length-1) {
			newSize++;
		}
		
		if(run._isParagraphStyleShared()) {
			pCol.updateTextSize( pCol.getCharactersCovered() - run.getLength() + s.length() );
		} else {
			pCol.updateTextSize(newSize);
		}
		if(run._isCharacterStyleShared()) {
			cCol.updateTextSize( cCol.getCharactersCovered() - run.getLength() + s.length() );
		} else {
			cCol.updateTextSize(newSize);
		}
		
		// Build up the new text
		// As we go through, update the start position for all subsequent runs
		// The building relies on the old text still being present
		StringBuffer newText = new StringBuffer();
		for(int i=0; i<_rtRuns.length; i++) {
			int newStartPos = newText.length();
			
			// Build up the new text
			if(i != runID) {
				// Not the affected run, so keep old text
				newText.append(_rtRuns[i].getRawText());
			} else {
				// Affected run, so use new text
				newText.append(s);
			}
			
			// Do we need to update the start position of this run?
			// (Need to get the text before we update the start pos)
			if(i <= runID) {
				// Change is after this, so don't need to change start position
			} else {
				// Change has occured, so update start position
				_rtRuns[i].updateStartPosition(newStartPos);
			}
		}
		
		// Now we can save the new text
		storeText(newText.toString());
	}

	/**
	 * Changes the text, and sets it all to have the same styling
	 *  as the the first character has. 
	 * If you care about styling, do setText on a RichTextRun instead 
	 */
	public synchronized void setText(String s) {
		// Save the new text to the atoms
		storeText(s);
		RichTextRun fst = _rtRuns[0];

		// Finally, zap and re-do the RichTextRuns
		for(int i=0; i<_rtRuns.length; i++) { _rtRuns[i] = null; }
		_rtRuns = new RichTextRun[1];
        _rtRuns[0] = fst;

		// Now handle record stylings:
		// If there isn't styling
		//  no change, stays with no styling
		// If there is styling:
		//  everthing gets the same style that the first block has
		if(_styleAtom != null) {
			LinkedList pStyles = _styleAtom.getParagraphStyles();
			while(pStyles.size() > 1) { pStyles.removeLast(); }
			
			LinkedList cStyles = _styleAtom.getCharacterStyles();
			while(cStyles.size() > 1) { cStyles.removeLast(); }
			
			_rtRuns[0].setText(s);
		} else {
			// Recreate rich text run with no styling
			_rtRuns[0] = new RichTextRun(this,0,s.length());
		}
	}

	/**
	 * Ensure a StyleTextPropAtom is present for this run, 
	 *  by adding if required. Normally for internal TextRun use.
	 */
	public synchronized void ensureStyleAtomPresent() {
		if(_styleAtom != null) {
			// All there
			return;
		}
		
		// Create a new one at the right size
		_styleAtom = new StyleTextPropAtom(getRawText().length() + 1);
		
		// Use the TextHeader atom to get at the parent
		RecordContainer runAtomsParent = _headerAtom.getParentRecord();
		
		// Add the new StyleTextPropAtom after the TextCharsAtom / TextBytesAtom
		Record addAfter = _byteAtom;
		if(_byteAtom == null) { addAfter = _charAtom; }
		runAtomsParent.addChildAfter(_styleAtom, addAfter);
		
		// Feed this to our sole rich text run
		if(_rtRuns.length != 1) {
			throw new IllegalStateException("Needed to add StyleTextPropAtom when had many rich text runs");
		}
		// These are the only styles for now 
		_rtRuns[0].supplyTextProps(
				(TextPropCollection)_styleAtom.getParagraphStyles().get(0),
				(TextPropCollection)_styleAtom.getCharacterStyles().get(0),
				false,
				false
		);
	}

	// Accesser methods follow

	/**
	 * Returns the text content of the run, which has been made safe
	 * for printing and other use.
	 */
	public String getText() {
		String rawText = getRawText();

		// PowerPoint seems to store files with \r as the line break
		// The messes things up on everything but a Mac, so translate
		//  them to \n
		String text = rawText.replace('\r','\n');
		return text;
	}

	/**
	* Returns the raw text content of the run. This hasn't had any
	*  changes applied to it, and so is probably unlikely to print
	*  out nicely.
	*/
	public String getRawText() {
		if(_isUnicode) {
			return _charAtom.getText();
		} else {
			return _byteAtom.getText();
		}
	}
	
	/**
	 * Fetch the rich text runs (runs of text with the same styling) that
	 *  are contained within this block of text
	 * @return
	 */
	public RichTextRun[] getRichTextRuns() {
		return 	_rtRuns;
	}
	
	/**
	* Returns the type of the text, from the TextHeaderAtom.
	* Possible values can be seen from TextHeaderAtom
	* @see org.apache.poi.hslf.record.TextHeaderAtom
	*/
	public int getRunType() { 
		return _headerAtom.getTextType();
	}

	/**
	* Changes the type of the text. Values should be taken
	*  from TextHeaderAtom. No checking is done to ensure you
	*  set this to a valid value!
	* @see org.apache.poi.hslf.record.TextHeaderAtom
	*/
	public void setRunType(int type) {
		_headerAtom.setTextType(type);
	}
	
	/**
	 * Supply the SlideShow we belong to.
	 * Also passes it on to our child RichTextRuns
	 */
	public void supplySlideShow(SlideShow ss) {
		slideShow = ss;
		if(_rtRuns != null) {
			for(int i=0; i<_rtRuns.length; i++) {
				_rtRuns[i].supplySlideShow(slideShow);
			}
		}
	}

    public void setSheet(Sheet sheet){
        this.sheet = sheet;
    }

    public Sheet getSheet(){
        return this.sheet;        
    }

    /**
     * @return  Shape ID
     */
    protected int getShapeId(){
        return shapeId;
    }

    /**
     *  @param id Shape ID
     */
    protected void setShapeId(int id){
        shapeId = id;
    }

    /**
     * Returns the array of all hyperlinks in this text run
     *
     * @return the array of all hyperlinks in this text run
     * or <code>null</code> if not found.
     */
    public Hyperlink[] getHyperlinks(){
        return Hyperlink.find(this);
    }
}