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Cache the default Ex amd Em sizes rather than look them up each time

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Davide P. Cervone 2011-09-20 08:40:35 -04:00
parent 9153cd2f2e
commit 9c6044a98a
6 changed files with 24 additions and 10 deletions
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2
config/Accessible-full.js
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2
config/MML_HTMLorMML-full.js
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config/TeX-AMS-MML_HTMLorMML-full.js
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config/TeX-AMS_HTML-full.js
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jax/output/HTML-CSS/jax.js
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24
unpacked/jax/output/HTML-CSS/jax.js
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@ -381,7 +381,7 @@
[["hr",{style: {width:"100%", size:1, padding:0, border:0, margin:0}}]]);
// Set up styles and preload web fonts
return AJAX.Styles(this.config.styles,["PreloadWebFonts",this]);
return AJAX.Styles(this.config.styles,["InitializeHTML",this]);
},
removeSTIXfonts: function (fonts) {
@ -403,6 +403,20 @@
}
},
//
// Handle initialization that requires styles to be set up
//
InitializeHTML: function () {
this.PreloadWebFonts();
//
// Get the default sizes (need styles in place to do this)
//
document.body.appendChild(this.EmExSpan);
this.defaultEx = this.EmExSpan.firstChild.offsetWidth/60;
this.defaultEm = this.EmExSpan.lastChild.firstChild.offsetWidth/60;
document.body.removeChild(this.EmExSpan);
},
preTranslate: function (state) {
var scripts = state.jax[this.id], i, m = scripts.length,
script, prev, span, div, test, jax, ex, em, scale;
@ -451,14 +465,14 @@
script = scripts[i]; if (!script.parentNode) continue;
jax = script.MathJax.elementJax; test = script.previousSibling;
ex = jax.HTMLCSS.ex = test.firstChild.offsetWidth/60;
em = test.lastChild.firstChild.offsetWidth/60;
if (ex === 0 || ex === "NaN") {
// can't read width, so move to hidden div for processing
// (this will cause a reflow for each math element that is hidden)
this.hiddenDiv.appendChild(test.previousSibling);
this.hiddenDiv.appendChild(test);
jax.HTMLCSS.isHidden = true;
ex = jax.HTMLCSS.ex = test.firstChild.offsetWidth/60;
ex = jax.HTMLCSS.ex = this.defaultEx; em = this.defaultEm;
}
em = test.lastChild.firstChild.offsetWidth/60;
scale = Math.floor(Math.max(this.config.minScaleAdjust/100,(ex/this.TeX.x_height)/em) * this.config.scale);
jax.HTMLCSS.scale = scale/100; jax.HTMLCSS.fontSize = scale+"%";
jax.HTMLCSS.marginScale = 1; jax.HTMLCSS.em = jax.HTMLCSS.outerEm = em;
@ -487,7 +501,7 @@
//
for (i = 0; i < m; i++) {
script = scripts[i]; if (!script.parentNode) continue;
test = this.getTestSpan(script);
test = scripts[i].previousSibling;
test.parentNode.removeChild(test);
}
//