On 03 Mar 2011, at 13:08, Vincent Hennebert wrote: >> Unless ... the viewport is where the actual rotation takes place. >> IIC, the region-viewport's before-edge is still parallel to the >> page-reference-area's before edge. The before-edge of the >> region-reference-area, however, is the one that is rotated another 90 >> degrees... > > See the following sentence in Section 6.4.15, “fo:region-before”: > “The reference-orientation and writing-mode of the > region-viewport-area are determined by the formatting object that > generates the area (see 6.4.5 fo:page-sequence). The > reference-orientation of the region-reference-area is set to "0" and > is, therefore, the same as the orientation established by the > region-viewport-area. The writing-mode of the region-reference-area > is set to the same value as that of the region-viewport-area.” > > So the region-reference-area has the same orientation as the > page-viewport-area.
Let's assume that this refers to the default/normal situation. After all, we are quoting the _general_ fo:region-before definition (= where no deviating reference-orientation has been specified on the region). I would not believe anyone claiming that this definition was written with the intention of covering all possible combinations of reference-orientation/writing-mode. The general definition just states the normal behavior: if no deviating reference-orientation has been specified, the region-reference-area will have the same orientation as the viewport. The definition of reference-orientation (7.21.3) states that a value of '90' means that "the reference-orientation of this *reference-area* is rotated 90 degrees counter-clockwise from the reference-orientation of the *containing reference-area*." So, specifying reference-orientation="90" on the region rotates its reference-area by 90 degrees from the page-reference-area. Nothing is said about the viewport here, mind you. It is in the viewport that a new coordinate system is established, not 'around' it, so to speak. The before-edge still remains in parallel with the page-reference-area's before-edge, when looking at it from the parent. Inside the viewport, before/after/start/end get different meanings, for the placement/dimensions of the child (reference-area). Regards, Andreas ---
