Negative space values are ok. No need to force them to 0. See block_space-before_space-after_1.xml. 4.3 says that negative values are ok and that they are used to create overlapping areas.
On 04.10.2005 08:28:43 Manuel Mall wrote: > In 6.5.2 it says: > > The .minimum, .optimum, and .maximum components of the half-leading > trait are set to 1/2 the difference of the computed value of the > line-height property and the computed value of the sum of the > text-altitude and text-depth properties. The .precedence > and .conditionality components are copied from the line-height > property. > > If the line-height is smaller than the total text height we get a > negative "half-leading" trait value. Is that a legal/sensible/plausible > value or should it be forced to 0 in this case? > > For 2 of the 3 different line-stacking-strategies the half-leading trait > becomes a space-before/after specifier on the line area and therefore > becomes part of the space resolution algorithm. I assume negative > values are OK in that case although I am not sure? > > Manuel Jeremias Maerki
