#6512: [with patch, positive review] Link to jsMath's easy/load.js only if the
documentation is built with --jsmath
---------------------------+------------------------------------------------
Reporter: mpatel | Owner: tba
Type: defect | Status: closed
Priority: major | Milestone: sage-4.1.1
Component: documentation | Resolution: fixed
Keywords: | Reviewer: David Loeffler
Author: Mitesh Patel | Merged: sage-4.1.1.alpha0
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Comment(by jason):
I agree that the change above looks like the correct one. Another option
was to have jsmath automatically typeset the stuff in the alt parameter of
the img files. Davide Cervone sent me a message with a way to do that:
{{{
Jason:
I've attached a javascript file that should do the preprocessing that you
need. It implements the suggestion I made to you about making span's with
display:none so that the images show until jsMath reprocesses them. You
can load it just before jsMath/easy/load.js, or you could add it to the
loadFiles list in easy/load.js. Let me know if this doesn't do the trick
for you.
Davide
On Jul 13, 2009, at 11:34 PM, [email protected] wrote:
> Davide P. Cervone wrote:
>> Jason:
>>
>> Here's what's going on: jsMath looks for DIV's and SPAN's that are
marked by CLASS="math" and treats their contents as TeX source code to
process. It replaces the original contents of the DIV or SPAN with the
typeset version of the TeX code. Because the image's are not DIV's or
SPAN's jsMath ignores them (even though they are CLASS="math"), but the
<DIV CLASS="math"> that contains an image is processed by jsMath. It
takes the text content of the DIV (empty in this case) and typesets it
(the result is blank). Thus the image disappears and is replaced by
nothing.
>
> Thanks! Your explanation and suggestions below are very appreciated!
>
> Jason
}}}
The javascript code is:
{{{
(function () {
var PREPROCESS = function () {
var parent, span, i;
var img = document.getElementsByTagName("img");
for (i = 0; i < img.length; i++) {
if (img[i].alt) {
parent = img[i].parentNode.parentNode;
if (img[i].className === "math") {
span =
img[i].parentNode.insertBefore(document.createElement("span"),img[i]);
span.className = "math";
span.appendChild(img[i]);
span = span.appendChild(document.createElement("span"));
span.style.display = "none";
span.appendChild(document.createTextNode(img[i].alt));
} else if (parent && parent.tagName.toLowerCase() === "div" &&
parent.className === "math") {
span =
img[i].parentNode.appendChild(document.createElement("span"));
span.style.display = "none";
span.appendChild(document.createTextNode(img[i].alt));
}
}
}
};
if (window.addEventListener)
{window.addEventListener("load",PREPROCESS,false)}
else if (window.attachEvent) {window.attachEvent("onload",PREPROCESS)}
else {window.onload = PREPROCESS}
})();
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6512#comment:7>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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