347932 - compareDocumentPosition() method returns hex values masquerading as decimal values

Status: RESOLVED INVALID

(Firefox :: General, defect)

Description

[dannyg]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5.0.6
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5.0.6

The Node.compareDocumentPosition() method returns hexadecimal values in decimal clothing. This prevents testing equality against the comparision constants, which evaluate to decimal values. This affects two constants:
  const unsigned short      DOCUMENT_POSITION_CONTAINED_BY = 0x10;
  const unsigned short      DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20;

document.body.compareDocumentPosition(document.body.parentNode)
  // returns 10

Node.DOCUMENT_POSITION_CONTAINED_BY
  // evaluates to 16

document.body.compareDocumentPosition(document.body.parentNode) == Node.DOCUMENT_POSITION_CONTAINED_BY
  // evaluates to false

parseInt(document.body.compareDocumentPosition(document.body.parentNode),16) == Node.DOCUMENT_POSITION_CONTAINED_BY
  // evaluates to true

Or is my perception of the DOM Level 3 spec twisted around, and the constants should be returning hex values?



Reproducible: Always

Comment 1

[dannyg]

Duh, bit masks. Nothing to see here.