On 8/27/2015 10:57 PM, Hans Hagen wrote:

On 8/25/2015 5:05 PM, massifr@fastwebnet.it wrote:

...

Hello list, I'm working on HTML typesetting with ConTeXt. I wrote a custom expression to test whether an element has a class:

function xml.functions.classes(classAttr) local classes = {} if classAttr then for c in string.gmatch(classAttr, "%S+") do if (string.len(c) > 0) then classes[c] = true end end end return classes end

function xml.expressions.hasClass(classAttr, className) if classAttr and className then return xml.functions.classes(classAttr)[className] ~= nil end return false end

This way I can write this in my xmlsetup: \xmlsetsetup{#1}{p[hasClass(@class,'myclass1')]}{html:p:myclass1}

That is better than - p[@class='myclass1'] (it fails when you have more classes) - p[contains(@class, 'myclass1')] (it gives you false positives when you have class="myclass12")

That works, but I would like to write: \xmlsetsetup{#1}{p[hasClass('myclass1')]}{html:p:myclass1}

omitting the @class argument, because it's obvious. To omit it I need to access the current collected element.

At page 25 of "Dealing with XML in ConTeXt MkIV" it is said that the predefined variables "list","l","ll" (I think I need that one) and "order" are available, but I did not manage to access them.

How can I get the current element in Lua to write local classAttr = xml.attribute(currentElement, "", "class") ?

function xml.functions.classes(e) local class = e.at.class if class then local classes = { } for c in string.gmatch(class,"%S+") do classes[c] = true end return classes else return { } end end

alternative: function xml.functions.hasclass(e,c,class) class = class and e.at[class] or e.at.class if class and class ~= "" then if class == c then return true else for s in string.gmatch(class,"%S+") do if s == c then return true end end end end return false end .. hasclass("foo") -- ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------