7167 2009-07-29 16:43:21 +0000 Improving the rendering of menclose 2010-08-04 23:23:13 +0000 1 1 1 Unclassified Amaya MathML unspecified PC Linux NEW http://www.maths-informatique-jeux.com/international/mathml_test/menclose.xml P2 enhancement --- 7166 1 fred.wang vincent.quint carcone emilien.kia fred.wang Irene.Vatton vincent.quint vincent.quint oldest_to_newest 26121 0 fred.wang 2009-07-29 16:43:21 +0000 Currently Amaya can only display one kind of notation in a menclose element. Moreover some notations have an approximative rendering. http://www.w3.org/TR/MathML2/chapter3.html#presm.menclose 26163 1 fred.wang 2009-08-01 09:21:39 +0000 Below is approximately the algorithm that will be used in Firefox. Do you think it can be expressed using the P language? 1) Parsing of "notation" attribute. See bug 7166. box is the same as top + left + bottom + right 2) Computation of the bounding box We want to enclose a content of bounding box of size w x h. To do this, we need to determine the paddings t, l, r and b such that all notations can be drawn inside the menclose bounding box of size (l + w + r) x (t + h + b). Hence we analyse the padding needed for each notation and take the maximum. 2.1) set t, l, r, b to zero 2.2) roundedbox, top, left, bottom: l is at least v0 2.3) roundedbox, top, right, bottom: r is at least v0 2.4) roundedbox, top, left, right: t is at least v0 2.5) roundedbox, bottom, left, right: b is at least v0 2.6) circle: l & r is at least w * v1 ; t & b is at least h * v1 2.7) longdiv: t is a least v2 and l is a least v3 2.8) radical: t is a least v2 and l is a least v4 v0 = an arbitrary padding, for instance 3 * thickness of drawing v1 = (sqrt(2) - 1)/2 v2 = the thickness of the top bar + an arbitrary space v3 = width of the right parenthesis character v4 = width of the radical character 2.9) circle: center the ellipse: l = r = max(l, r) and t = b = max(t, b) 3) Drawing the notation 3.1) longdiv and radical: draw the characters (parenthesis & radical) on the left of the content and a top bar above the content. 3.2) other notations: draw them using the bounding box of menclose. "circle" is actually an ellipse. For 3.1) Amaya does not use characters but graphics. 26164 2 fred.wang 2009-08-01 09:30:24 +0000 Actually 2.2, 2.3, 2.4, 2.5 also apply to circle