ntg-context December 2004

ntg-context@ntg.nl

52 participants
90 discussions

bookmarks problems
by Christopher Creutzig 16 Dec '04

16 Dec '04

Salvete, I have two problems with bookmarks: - Preview.App does display the list of bookmarks, but they do not work. The same file has no such problems in Adobe. (There are files with bookmarks that work ok in Preview.App, such as the Adobe JavaScript reference.) - I fail to provide a bookmark different from a chapter title, if that title is not followed by text, but directly by a \section command. Whether I place \bookmark in front of or behind the \chapter command, it affects the next section command with text behind it. \setupinteraction[state=start] \placebookmarks[chapter,section] \starttext \chapter{normal chapter} \section{one} \chapter{\quotation{special} chapter} \bookmark{"special" chapter} \section{two} \section{three} test \stoptext regards, Christopher Creutzig

3 4

\placetable and \starttables ... \stoptables
by Nikolai Weibull 16 Dec '04

16 Dec '04

\starttext \placetable [][] {Operators} {\start \starttablehead \HL \NC \bf Operator \NC \bf Matches \NC\SR \HL \stoptablehead \starttabletail \HL \stoptabletail \starttables[|l|lp(25em)|] \dorecurse{50}{\NC . \NC anything \NC\AR} \stoptables\stop} \stoptext This doesn't split appropriately. It works OK if one removes the placetable, but that kind of counteracts the whole idea. Am I doing something wrong, or is this an issue with the tables code? nikolai -- ::: name: Nikolai Weibull :: aliases: pcp / lone-star / aka ::: ::: born: Chicago, IL USA :: loc atm: Gothenburg, Sweden ::: ::: page: www.pcppopper.org :: fun atm: gf,lps,ruby,lisp,war3 ::: main(){printf(&linux["\021%six\012\0"],(linux)["have"]+"fun"-97);}

2 2

FAQ style
by VnPenguin 15 Dec '04

15 Dec '04

Hi, I'm looking for FAQ style (print & screen). Thank you for your suggestion. Quy NGUYEN-DAI

2 3

XML & <formula>s
by Adam Lindsay 15 Dec '04

15 Dec '04

Hi all. I want to use XML, but in a non-doctrinaire way: I much prefer TeX formula writing to mathml by hand. I looked at xtag-mml, and the \defineXMLenvironment [formula] looked like just what I wanted. However, when trying it, the XML catcode regime was still in effect, and the backslashes were printed, and didn't act as escapes. Am I missing something in the correct usage, or is support "incomplete"? This is a sample file, showing how I've been trying to use it: \useXMLfilter[mml] \starttext \startXMLdata <formula> t+3+x+t\neq m\alpha\frac\theta\hbar </formula> \stopXMLdata \stoptext Also, what's the status of contml? I like the idea of it as a simple, structural, basic markup that ConTeXt handles with zero effort, but is anyone actually using it? adam -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Adam T. Lindsay, Computing Dept. atl(a)comp.lancs.ac.uk Lancaster University, InfoLab21 +44(0)1524/510.514 Lancaster, LA1 4WA, UK Fax:+44(0)1524/510.492 -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

4 8

At a loss how to proceed
by David Arnold 15 Dec '04

15 Dec '04

All, Lately, I've had a number of discussions with the director of disabled student services at our school regarding document preparation for the visually impaired. As a result of these discussions, I am a bit lost as how to proceed with the preparation of mathematics for the web and documents for my course content. I've paid a little attention to the develoment of MathML, but I've always said "Who wants to code like that?" whenever I look at examples. However, today I found: http://www.dessci.com/en/company/press/releases/040722.htm I now realize that software that reads web pages aloud it pretty important. But how do I, in my limited time, prepare documents for multiple purposes? Can I use Context to support all of our students at our school? Just how do I proceed? At a loss.

4 3

Division bug in \doMPconcat (supp-pdf.tex)
by Dan Luecking 15 Dec '04

15 Dec '04

I encountered a problem with supp-pdf when I tried to rewrite Knuths "dangerous bend" as a MetaPost figure. Very little change was required to get a good picture, but the "reverse dangerous bend" (obtained by merely reflecting the currentpicture" produced a quite grotesquely distorted picture. I tracked this down to the method used to divide by the determinant of the scaling matrix in \doMPconcat. The division code is the following: \ifdim\dimen16=\onepoint \else \ifdim\dimen16>\MPconcatfactor \onepoint \relax \doMPreducedimen16 \divide \dimen18 \dimen16 \doMPexpanddimen18 \divide \dimen12 \dimen16 \doMPexpanddimen12 \else \divide \dimen18 \dimen16 \doMPexpanddimen18 \doMPexpanddimen18 \divide \dimen12 \dimen16 \doMPexpanddimen12 \doMPexpanddimen12 \fi \fi In the reverse dangerous bend symbol \dimen16 (the determinant in question) is -1 and \MPconcatfactor is 256, so the else part is taken. The division is integer division, so the accuracy (after the two \doMPexpanddimen) is +/- 1pt. This turns values like the following: 58.11118 -61.6534 7.53143 -11.0737 7.52731 -11.06958 c 4.48691 -8.02919 1.99252 -4.2878 1.99252 0 c 1.99252 4.2878 4.48691 8.02919 7.52731 11.06958 c 7.53143 11.0737 58.11118 61.6534 58.1153 61.65752 c into (actual code in from uncompressed pdf output): 58.0 -61.0 7.0 -11.0 7.0 -11.0 c 4.0 -8.0 1.0 -4.0 1.0 0.0 c 1.0 4.0 4.0 8.0 7.0 11.0 c 7.0 11.0 58.0 61.0 58.0 61.0 c Similar problems occur if the figure is rotated. (Theoretically, the determinant is 1, but with only 5 decimal accuracy, the same branch is taken.) Also the \if tests above don't take the sign of \dimen16 into account. There is a lesser problem with multiplication when numbers are less than around 1pt. The pre-division by 256 (\doMPreducedimen) reduce accuracy to less than 3 significant decimal digits (i.e., 8 binary digits). I have written some modifications for supp-pdf that avoid all of these. No pre-division is used because multiplication is accomplished by something like \dimen16 = \withoutpt\the\dimen0 \dimen6 and division is accomplished by computing 1/D and multiplying. Since the numerator (1) is fixed, this one division can be arranged for maximum accuracy. I do this by halving D until it is less than 1pt, keeping track of the number of halvings required. Then I divide 2^30 by D, then double the result 2 fewer times than than D was halved. This guarantees at least 14 binary places accuracy, or the number of places in D, whichever is smaller. My speed tests show that the resulting code is as fast or slightly faster than the current code. Further efficiency could be gained by performing the calculation of D outside the loop of calls to \doMPconcat (I have not done this yet). The current state of my code can be found at http://comp.uark.edu/~luecking/tex/supp-pdf.mod and a stripped down version of the reverse dangerous bend code that shows the problem is http://comp.uark.edu/~luecking/tex/rdbend.mp Comments are welcome. I hope at least the division can be made more accurate in the context distribution. Dan Luecking Daniel H. Luecking Department of Mathematical Sciences University of Arkansas

2 1

Bad link -- Login?
by David Arnold 14 Dec '04

14 Dec '04

All, Perhaps a bad link? http://www.pragma-ade.com/show-mag-9.htm I cannot gain access to mag 8 either.

2 1

\bfm broken
by David Munger 13 Dec '04

13 Dec '04

\bfm seems broken in 2004.12.06 Compiling the following: \setupformulas [method=bold] \starttext \startformula {\bfm x} \stopformula \stoptext results in: ... ! Bad number (127). <argument> \defaultskewcharmi \dosetskewchar ...ar \empty \skewchar \textfont #1 #2\skewchar \scriptfont #1... <inserted text> ...ultskewcharmi \dosetmathfamily \sybffam \textface \script... <inserted text> ...\else \the \boldmathstrategies \fi \autoenablemathcollect... \synchronizemath ...athfonts \the \mathstrategies \fam \mrfam \fi <inserted text> ...bfamily \c!bf \synchronizemath \aftergroup \synchronizemath ... l.4 {\bfm x} ? Any help welcome. Thanks in advance, David

3 2

[BUG] \type<<...>> not working
by Nikolai Weibull 13 Dec '04

13 Dec '04

\starttext \type<<...>> \stoptext It doesn't seem to see the end delimiter, nikolai -- ::: name: Nikolai Weibull :: aliases: pcp / lone-star / aka ::: ::: born: Chicago, IL USA :: loc atm: Gothenburg, Sweden ::: ::: page: www.pcppopper.org :: fun atm: gf,lps,ruby,lisp,war3 ::: main(){printf(&linux["\021%six\012\0"],(linux)["have"]+"fun"-97);}

2 1

\placefigure bug
by Taco Hoekwater 13 Dec '04

13 Dec '04

Hans, The following gives me and undefined reference: %%%%%%%%%%%%%%%%%%% \starttext A test of a figure, see \in {figure} [figa] \placefigure [figa] {The caption} {\externalfigure [02.jpg]} \stoptext %%%%%%%%%%%%%%%%%%% It only works correctly if both bracketed arguments to \placefigure are supplied (I tested versions 2004.11.06 and 2004.12.06, but it probably affects other versions as well). Greetings, Taco

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ntg-context December 2004