PHP XLS 2003 (Excel) File - Detecting Cell Vertical Alignment

Question

I need to make a slight change to the PHP Excel Reader library; http://code.google.com/p/php-excel-reader/

I want to add support for vertical-alignment of cells (top, middle, bottom).

Here's how the normal alignment is detected:

                    $alignbit = ord($data[$pos+10]) & 3;

And here is the excel 2003 format specification:

http://sc.openoffice.org/excelfileformat.pdf

I'm not sure if this is the correct setting:

Does anyone know what bit I need to get (similar to the $alignbit) in order to get the vertical alignment? (1 of 6 possibilities)

Thanks, Wesley

Answer 1

Personally I'd use

$horizontalAlign = (0x07 & ord($data[$pos+10])) >> 0;

rather than

$horizontalAlign = ord($data[$pos+10]) & 3;

because you can then match the mask (0x07) up with the spec definition more obviously

Using the same principle, vertical alignment is bits 6-4, mask 0x70, so

$verticalAlign = (0x70 & ord($data[$pos+10])) >> 4;
switch ($verticalAlign) {
    case 0:
        //  VERTICAL_TOP
        break;
    case 1:
        //  VERTICAL_CENTER
        break;
    case 2:
        //  VERTICAL_BOTTOM
        break;
    case 3:
        //  VERTICAL_JUSTIFY
        break;
    case 4:
        //  VERTICAL_DISTRIBUTED
        break;
}

PS. Why are you still using Open Office's partial spec, when Microsoft have published the full specification