pdfptable.java

iText是一个能够快速产生PDF文件的java类库。iText的java类对于那些要产生包含文本

                totalHeight += row.getMaxHeights();
        }
    }
    
    /** Gets the default <CODE>PdfPCell</CODE> that will be used as
     * reference for all the <CODE>addCell</CODE> methods except
     * <CODE>addCell(PdfPCell)</CODE>.
     * @return default <CODE>PdfPCell</CODE>
     */    
    public PdfPCell getDefaultCell() {
        return defaultCell;
    }
    
    /** Adds a cell element.
     * @param cell the cell element
     */    
    public void addCell(PdfPCell cell) {
        PdfPCell ncell = new PdfPCell(cell);
        int colspan = ncell.getColspan();
        colspan = Math.max(colspan, 1);
        colspan = Math.min(colspan, currentRow.length - currentRowIdx);
        ncell.setColspan(colspan);
        if (colspan != 1)
            isColspan = true;
        int rdir = ncell.getRunDirection();
        if (rdir == PdfWriter.RUN_DIRECTION_DEFAULT)
            ncell.setRunDirection(runDirection);
        currentRow[currentRowIdx] = ncell;
        currentRowIdx += colspan;
        if (currentRowIdx >= currentRow.length) {
            if (runDirection == PdfWriter.RUN_DIRECTION_RTL) {
                PdfPCell rtlRow[] = new PdfPCell[absoluteWidths.length];
                int rev = currentRow.length;
                for (int k = 0; k < currentRow.length; ++k) {
                    PdfPCell rcell = currentRow[k];
                    int cspan = rcell.getColspan();
                    rev -= cspan;
                    rtlRow[rev] = rcell;
                    k += cspan - 1;
                }
                currentRow = rtlRow;
            }
            PdfPRow row = new PdfPRow(currentRow);
            if (totalWidth > 0) {
                row.setWidths(absoluteWidths);
                totalHeight += row.getMaxHeights();
            }
            rows.add(row);
            currentRow = new PdfPCell[absoluteWidths.length];
            currentRowIdx = 0;
        }
    }
    
    /** Adds a cell element.
     * @param text the text for the cell
     */    
    public void addCell(String text) {
        addCell(new Phrase(text));
    }
    
    /**
     * Adds a nested table.
     * @param table the table to be added to the cell
     */    
    public void addCell(PdfPTable table) {
        defaultCell.setTable(table);
        addCell(defaultCell);
        defaultCell.setTable(null);
    }
    
    /**
     * Adds an Image as Cell.
     * @param image the <CODE>Image</CODE> to add to the table. This image will fit in the cell
     */    
    public void addCell(Image image) {
        defaultCell.setImage(image);
        addCell(defaultCell);
        defaultCell.setImage(null);
    }
    
    /**
     * Adds a cell element.
     * @param phrase the <CODE>Phrase</CODE> to be added to the cell
     */    
    public void addCell(Phrase phrase) {
        defaultCell.setPhrase(phrase);
        addCell(defaultCell);
        defaultCell.setPhrase(null);
    }
    
    /**
     * Writes the selected rows to the document.
     * <P>
     * <CODE>canvases</CODE> is obtained from <CODE>beginWritingRows()</CODE>.
     * @param rowStart the first row to be written, zero index
     * @param rowEnd the last row to be written + 1. If it is -1 all the
     * rows to the end are written
     * @param xPos the x write coodinate
     * @param yPos the y write coodinate
     * @param canvases an array of 4 <CODE>PdfContentByte</CODE> obtained from
     * <CODE>beginWrittingRows()</CODE>
     * @return the y coordinate position of the bottom of the last row
     * @see #beginWritingRows(com.lowagie.text.pdf.PdfContentByte)
     */    
    public float writeSelectedRows(int rowStart, int rowEnd, float xPos, float yPos, PdfContentByte[] canvases) {
        return writeSelectedRows(0, -1, rowStart, rowEnd, xPos, yPos, canvases);
    }
    
    /** Writes the selected rows and columns to the document.
     * This method does not clip the columns; this is only important
     * if there are columns with colspan at boundaries.
     * <P>
     * <CODE>canvases</CODE> is obtained from <CODE>beginWritingRows()</CODE>.
     * <P>
     * The table event is only fired for complete rows.
     * @param colStart the first column to be written, zero index
     * @param colEnd the last column to be written + 1. If it is -1 all the
     * columns to the end are written
     * @param rowStart the first row to be written, zero index
     * @param rowEnd the last row to be written + 1. If it is -1 all the
     * rows to the end are written
     * @param xPos the x write coodinate
     * @param yPos the y write coodinate
     * @param canvases an array of 4 <CODE>PdfContentByte</CODE> obtained from
     * <CODE>beginWrittingRows()</CODE>
     * @return the y coordinate position of the bottom of the last row
     * @see #beginWritingRows(com.lowagie.text.pdf.PdfContentByte)
     */    
    public float writeSelectedRows(int colStart, int colEnd, int rowStart, int rowEnd, float xPos, float yPos, PdfContentByte[] canvases) {
        if (totalWidth <= 0)
            throw new RuntimeException("The table width must be greater than zero.");
        int size = rows.size();
        if (rowEnd < 0)
            rowEnd = size;
        rowEnd = Math.min(rowEnd, size);
        if (rowStart < 0)
            rowStart = 0;
        if (rowStart >= rowEnd)
            return yPos;
        if (colEnd < 0)
            colEnd = absoluteWidths.length;
        colEnd = Math.min(colEnd, absoluteWidths.length);
        if (colStart < 0)
            colStart = 0;
        colStart = Math.min(colStart, absoluteWidths.length);
        float yPosStart = yPos;
        for (int k = rowStart; k < rowEnd; ++k) {
            PdfPRow row = (PdfPRow)rows.get(k);
            if (row != null) {
                row.writeCells(colStart, colEnd, xPos, yPos, canvases);
                yPos -= row.getMaxHeights();
            }
        }
        if (tableEvent != null && colStart == 0 && colEnd == absoluteWidths.length) {
            float heights[] = new float[rowEnd - rowStart + 1];
            heights[0] = yPosStart;
            for (int k = rowStart; k < rowEnd; ++k) {
                PdfPRow row = (PdfPRow)rows.get(k);
                float hr = 0;
                if (row != null)
                    hr = row.getMaxHeights();
                heights[k - rowStart + 1] = heights[k - rowStart] - hr;
            }
            tableEvent.tableLayout(this, getEventWidths(xPos, rowStart, rowEnd, headersInEvent), heights, headersInEvent ? headerRows : 0, rowStart, canvases);
        }
        return yPos;
    }
    
    /**
     * Writes the selected rows to the document.
     * 
     * @param rowStart the first row to be written, zero index
     * @param rowEnd the last row to be written + 1. If it is -1 all the
     * rows to the end are written
     * @param xPos the x write coodinate
     * @param yPos the y write coodinate
     * @param canvas the <CODE>PdfContentByte</CODE> where the rows will
     * be written to
     * @return the y coordinate position of the bottom of the last row
     */    
    public float writeSelectedRows(int rowStart, int rowEnd, float xPos, float yPos, PdfContentByte canvas) {
        return writeSelectedRows(0, -1, rowStart, rowEnd, xPos, yPos, canvas);
    }
    
    /**
     * Writes the selected rows to the document.
     * This method clips the columns; this is only important
     * if there are columns with colspan at boundaries.
     * <P>
     * The table event is only fired for complete rows.
     * 
     * @param colStart the first column to be written, zero index
     * @param colEnd the last column to be written + 1. If it is -1 all the
     * @param rowStart the first row to be written, zero index
     * @param rowEnd the last row to be written + 1. If it is -1 all the
     * rows to the end are written
     * @param xPos the x write coodinate
     * @param yPos the y write coodinate
     * @param canvas the <CODE>PdfContentByte</CODE> where the rows will
     * be written to
     * @return the y coordinate position of the bottom of the last row
     */    
    public float writeSelectedRows(int colStart, int colEnd, int rowStart, int rowEnd, float xPos, float yPos, PdfContentByte canvas) {
        if (colEnd < 0)
            colEnd = absoluteWidths.length;
        colEnd = Math.min(colEnd, absoluteWidths.length);
        if (colStart < 0)
            colStart = 0;
        colStart = Math.min(colStart, absoluteWidths.length);
        if (colStart != 0 || colEnd != absoluteWidths.length) {
            float w = 0;
            for (int k = colStart; k < colEnd; ++k)
                w += absoluteWidths[k];
            canvas.saveState();
            float lx = 0;
            float rx = 0;
            if (colStart == 0)
                lx = 10000;
            if (colEnd == absoluteWidths.length)
                rx = 10000;
            canvas.rectangle(xPos - lx, -10000, w + lx + rx, 20000);
            canvas.clip();
            canvas.newPath();
        }
        PdfContentByte[] canvases = beginWritingRows(canvas);
        float y = writeSelectedRows(colStart, colEnd, rowStart, rowEnd, xPos, yPos, canvases);
        endWritingRows(canvases);
        if (colStart != 0 || colEnd != absoluteWidths.length)
            canvas.restoreState();
        return y;
    }
    
    /** Gets and initializes the 4 layers where the table is written to. The text or graphics are added to
     * one of the 4 <CODE>PdfContentByte</CODE> returned with the following order:<p>
     * <ul>
     * <li><CODE>PdfPtable.BASECANVAS</CODE> - the original <CODE>PdfContentByte</CODE>. Anything placed here
     * will be under the table.
     * <li><CODE>PdfPtable.BACKGROUNDCANVAS</CODE> - the layer where the background goes to.
     * <li><CODE>PdfPtable.LINECANVAS</CODE> - the layer where the lines go to.
     * <li><CODE>PdfPtable.TEXTCANVAS</CODE> - the layer where the text go to. Anything placed here
     * will be over the table.
     * </ul><p>
     * The layers are placed in sequence on top of each other.
     * @param canvas the <CODE>PdfContentByte</CODE> where the rows will
     * be written to
     * @return an array of 4 <CODE>PdfContentByte</CODE>
     * @see #writeSelectedRows(int, int, float, float, PdfContentByte[])
     */    
    public static PdfContentByte[] beginWritingRows(PdfContentByte canvas) {
        return new PdfContentByte[]{
            canvas,
            canvas.getDuplicate(),
            canvas.getDuplicate(),
            canvas.getDuplicate(),
        };
    }
    
    /** Finishes writing the table.
     * @param canvases the array returned by <CODE>beginWritingRows()</CODE>
     */    
    public static void endWritingRows(PdfContentByte[] canvases) {
        PdfContentByte canvas = canvases[BASECANVAS];
        canvas.saveState();
        canvas.add(canvases[BACKGROUNDCANVAS]);
        canvas.restoreState();
        canvas.saveState();
        canvas.setLineCap(2);
        canvas.resetRGBColorStroke();
        canvas.add(canvases[LINECANVAS]);
        canvas.restoreState();
        canvas.add(canvases[TEXTCANVAS]);
    }
    
    /** Gets the number of rows in this table.
     * @return the number of rows in this table
     */    
    public int size() {
        return rows.size();
    }
    
    /** Gets the total height of the table.
     * @return the total height of the table
     */    
    public float getTotalHeight() {
        return totalHeight;
    }
    
    /** Gets the height of a particular row.
     * @param idx the row index (starts at 0)
     * @return the height of a particular row
     */    
    public float getRowHeight(int idx) {
        if (totalWidth <= 0 || idx < 0 || idx >= rows.size())
            return 0;
        PdfPRow row = (PdfPRow)rows.get(idx);
        if (row == null)
            return 0;
        return row.getMaxHeights();
    }
    
    /** Gets the height of the rows that constitute the header as defined by
     * <CODE>setHeaderRows()</CODE>.
     * @return the height of the rows that constitute the header
     */    
    public float getHeaderHeight() {
        float total = 0;
        int size = Math.min(rows.size(), headerRows);
        for (int k = 0; k < size; ++k) {
            PdfPRow row = (PdfPRow)rows.get(k);
            if (row != null)
                total += row.getMaxHeights();
        }
        return total;
    }
    
    /** Deletes a row from the table.
     * @param rowNumber the row to be deleted
     * @return <CODE>true</CODE> if the row was deleted
     */    
    public boolean deleteRow(int rowNumber) {
        if (rowNumber < 0 || rowNumber >= rows.size()) {
            return false;
        }
        if (totalWidth > 0) {
            PdfPRow row = (PdfPRow)rows.get(rowNumber);
            if (row != null)
                totalHeight -= row.getMaxHeights();
        }
        rows.remove(rowNumber);
        return true;
    }
    
    /** Deletes the last row in the table.
     * @return <CODE>true</CODE> if the last row was deleted
     */    
    public boolean deleteLastRow() {
        return deleteRow(rows.size() - 1);
    }
    
    /**
     * Removes all of the rows except headers
     */
    public void deleteBodyRows() {
        ArrayList rows2 = new ArrayList();
        for (int k = 0; k < headerRows; ++k)
            rows2.add(rows.get(k));
        rows = rows2;
        totalHeight = 0;
        if (totalWidth > 0)
            totalHeight = getHeaderHeight();
    }

    /** Gets the number of the rows that constitute the header.
     * @return the number of the rows that constitute the header
     */
    public int getHeaderRows() {
        return headerRows;
    }
    
    /** Sets the number of the top rows that constitute the header.
     * This header has only meaning if the table is added to <CODE>Document</CODE>