30219 2009-10-08 10:01:09 -0700 SVG Path elements are not correctly updated through pathSegList manipulation on relative values 2010-11-17 06:28:31 -0800 1 1 1 Unclassified WebKit SVG 528+ (Nightly build) Mac OS X 10.5 RESOLVED DUPLICATE 49580 P2 Normal --- 10827 1 adeveria krit davinci jeffschiller krit zimmermann oldest_to_newest 153421 0 40884 adeveria 2009-10-08 10:01:09 -0700 Created attachment 40884 Demo that shows an example of the issue (works in FF/Opera) Altering a path using pathSegList methods [1] fails to properly change the element's "d" attribute, nor is the element painted correctly. Note that it does correctly add the segment to the pathSegList, as can be discovered by using .getItem(n) or accessing the numberOfItems attribute. But that's pretty useless as the actual shape is not changed. I have attached an SVG file that attempts to add a segment using insertItemBefore, then checks if the "d" attribute has changed. Until this is fixed, if someone knows a workaround to accomplish the same effect that does not require manipulating the "d" attribute itself, that would be greatly appreciated. This functionality is needed for adding/removing nodes in the SVG-edit project [2], and currently only works in Firefox & Opera. [1] http://www.w3.org/TR/SVG/paths.html#InterfaceSVGPathSegList [2] http://svg-edit.googlecode.com 203716 1 davinci 2010-03-24 18:16:40 -0700 I've looked a little bit into this and found the cause. The function SVGPathSegList::toPathData() is not completely implemented. Working on a patch. 203725 2 51576 davinci 2010-03-24 18:54:43 -0700 Created attachment 51576 Tentative patch I've made a tentative patch to fix this which adds code for relative coordinates in SVGPathSegList::toPathData(). If the approach looks good, SVGPathSegList::getPathSegAtLength() needs to be similarly updated as well. 204054 3 davinci 2010-03-25 07:44:03 -0700 One cause of the problem is bug 26487. It appears that all "Rel" path data commands are internally stored as "Abs" commands. Inserting a "relative lineto" (l - that's a lower case "L") command affects all subsequent data points. The above patch adds hackery to properly compute the coordinates in SVGPathSegList::toPathData(). The correct fix would be to not convert the data path commands to "Abs" to begin with. 205966 4 51576 zimmermann 2010-03-30 06:15:02 -0700 Comment on attachment 51576 Tentative patch As discussed on webkit-dev, this is probably not the right approach. Did you investigate a bit more, David? 206551 5 davinci 2010-03-31 09:45:03 -0700 (In reply to comment #4) > (From update of attachment 51576 [details]) > As discussed on webkit-dev, this is probably not the right approach. Did you > investigate a bit more, David? I investigated a bit more, but I haven't had time to come up with a proper solution. 264800 6 krit 2010-08-14 23:25:18 -0700 It is now possible to create unaltered SVGPathSegLists. Still use normalized SVGPathSegLists, untill we have a way to synchroinze dAttr, pathSegList and normalizedPathSegList. 310237 7 zimmermann 2010-11-17 06:28:31 -0800 *** This bug has been marked as a duplicate of bug 49580 *** 40884 2009-10-08 10:01:09 -0700 2009-10-08 10:01:09 -0700 Demo that shows an example of the issue (works in FF/Opera) path_update.svg image/svg+xml 1454 adeveria PD94bWwgdmVyc2lvbj0iMS4wIiBzdGFuZGFsb25lPSJubyI/Pgo8c3ZnIHdpZHRoPSI2MDAiIGhl aWdodD0iNTAwIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHhtbG5zOnhsaW5r PSJodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rIj4KICA8c2NyaXB0IHR5cGU9InRleHQvamF2 YXNjcmlwdCI+CiAgCTwhW0NEQVRBWwogIAkKICAJd2luZG93Lm9ubG9hZCA9IGZ1bmN0aW9uKCkg ewogIAkJdmFyIHBhdGggPSBkb2N1bWVudC5nZXRFbGVtZW50c0J5VGFnTmFtZSgncGF0aCcpWzBd OwogIAkJdmFyIHN0YXJ0ID0gZG9jdW1lbnQuZ2V0RWxlbWVudEJ5SWQoJ2Rfc3RhcnQnKTsKICAJ CXZhciBlbmQgPSBkb2N1bWVudC5nZXRFbGVtZW50QnlJZCgnZF9lbmQnKTsKICAJCQogIAkJdmFy 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