On Mar 25, 2015, at 9:47 AM, Simon Pieters <[email protected]<mailto:[email protected]>> wrote:
On Tue, 24 Mar 2015 22:36:17 +0100, Dirk Schulze <[email protected]<mailto:[email protected]>> wrote: On Mar 24, 2015, at 10:27 PM, Simon Pieters <[email protected]<mailto:[email protected]>> wrote: Most interfaces in the Geometry spec have a dictionary type so you can use a direct JS object as an argument instead of requiring the object to implement the relevant interface. DOMMatrix doesn't have a dictionary though. It seems to me that it should. Since DOMMatrix has both a-f and m11-m44 attributes, the dictionary will have to support members for all those as well and accept objects where all are set. It probably makes sense to have a dictionary member for is2D, to preserve it being false even though the members indicate a 2d matrix. The constructor could throw TypeError if it was set to true but the other members indicate a 3d matrix. I don't see any reason to have a dictionary member for isIdentity. The a-f members and the corresponding mXX members can't have default values in the IDL, but can be defaulted in prose in the algorithm. If e.g. a and m11 are set to different values we could throw TypeError. dictionary DOMMatrixInit { unrestricted double a; // 1 unrestricted double b; // 0 unrestricted double c; // 0 unrestricted double d; // 1 unrestricted double e; // 0 unrestricted double f; // 0 unrestricted double m11; // 1 unrestricted double m12; // 0 unrestricted double m13 = 0; unrestricted double m14 = 0; unrestricted double m21; // 0 unrestricted double m22; // 1 unrestricted double m23 = 0; unrestricted double m24 = 0; unrestricted double m31 = 0; unrestricted double m32 = 0; unrestricted double m33 = 1; unrestricted double m34 = 0; unrestricted double m41; // 0 unrestricted double m42; // 0 unrestricted double m43 = 0; unrestricted double m44 = 1; boolean is2D; }; Does this seem reasonable? We didn’t want to add more things than there were requests for initially. I think this is the only reason why we didn’t add it in the first place. OK, thanks. The current situation is inconsistent, which seems bad for Web developers. I admit that I can see confusion here. Greetings, Dirk -- Simon Pieters Opera Software
