https://issues.apache.org/bugzilla/show_bug.cgi?id=51639
--- Comment #6 from Glenn Adams <gl...@skynav.com> 2011-10-06 10:45:45 UTC --- (In reply to comment #5) > (In reply to comment #4) > > (In reply to comment #2) > > > Hi Vincent, > > > > > > Thank you very much for explanation. I offer a solution of this problem: > > > > > > Height of each line is computed in > > > LineLayoutManager.makeLineBreakPosition(...) > > > by choosing the largest value from all > > > KnuthInlineBox.alignmentContent.lineHeight values belonging to current > > > line. If > > > we add attribute alignmentContent to class KnuthGlue we'll have the > > > possibility > > > to assign glue elements line height and then possibility to choose the > > > largest > > > value of line height from both all > > > KnuthInlineBox.alignmentContent.lineHeight > > > and all KnuthGlue.alignmentContent.lineHeight values belonging to current > > > line. > > > > > > Can you proove that it is the idea FOP needs? If it is I'll start > > > implementation of this. > > > > > > Kind Regards, > > > Alexey > > > > i would not agree with this approach; the correct approach is to use one of > > the > > following Unicode space characters: > > > > U+2001 EM QUAD > > U+2003 EM SPACE > > > > the EM QUAD is 1 'em' high and 1'em' wide; while the EM SPACE is 1 'em' wide > > > > these would generate Knuth boxes (not glue) of the desired width and height, > > and scale to the font size so as to affect line height; > > > > if there is any modification to FOP to resolve this issue, then it should > > be to > > have FOP synthesize at least these (and perhaps a few other) 'spacing' space > > characters in case the selected font does not contain a mapping for them; > > > > since these 'spacing' space characters generate inline boxes, they are > > treated > > just like any other character; as such they are *not* treated as whitespace > > for > > the purpose of collapsing, glue behavior, etc > > > > regards, > > glenn > > Hi Glenn, > > I could't understand your idea why adding alignmentContent attribute to glue > elements can break the processing of 'spacing' space characters. We just have > the aim to store information about line-height in inline elements, that > contain > spaces only, I mean U+0020. In this case inline boxes are not generated, and > we > would like to have possibility to get line height from glue element. In case > of > other 'spacing' space characters logic would stay as it was, because glue > elements would have absolutely identical alignmentContent attribute as box > elements in one fo:inline. > > I explained my point. Could you explain yours? > > Kind regards, > Alexey i am disagreeing with you that glue should have a height; what you are trying to do is to assign a height to whitespace characters tha map to glue; the correct way to do that is to use a character that maps to a knuth box, not knuth glue; and the way you do that is using EM QUAD or EN QUAD characters; glue should have *NO* height, as that is fundamental change to the Knuth algorithm, so, no thank you - please use EM|EN QUAD -- Configure bugmail: https://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.
