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Cache measurements of unknown characters so they don't have to be remeasured later.

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This commit is contained in:
Davide P. Cervone 2015-03-13 14:42:24 -04:00
parent 563dd09fa7
commit c58b546ad7
2 changed files with 29 additions and 12 deletions
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7
unpacked/jax/output/CommonHTML/fonts/TeX/fontdata.js
View File

@ -69,6 +69,13 @@
"MathJax_Typewriter": "Typewriter/Regular/Main.js",
"MathJax_Caligraphic-bold": "Caligraphic/Bold/Main.js"
},
UNKNOWN: {
R: {className:"MJXc-TeX-unknown-R"},
I: {className:"MJXc-TeX-unknown-I"},
B: {className:"MJXc-TeX-unknown-B"},
BI: {className:"MJXc-TeX-unknown-BI"}
},
VARIANT: {
"normal": {fonts:[MAIN,SIZE1,AMS], cache: {},

34
unpacked/jax/output/CommonHTML/jax.js
View File

@ -104,13 +104,16 @@
".MJXc-space2": {"margin-left":".222em"},
".MJXc-space3": {"margin-left":".278em"},
".MJXc-TeX-unknown": {"font-family":UNKNOWNFAMILY},
".MJXc-TeX-unknown-R": {"font-family":UNKNOWNFAMILY, "font-style":"normal", "font-weight":"normal"},
".MJXc-TeX-unknown-I": {"font-family":UNKNOWNFAMILY, "font-style":"italic", "font-weight":"normal"},
".MJXc-TeX-unknown-B": {"font-family":UNKNOWNFAMILY, "font-style":"normal", "font-weight":"bold"},
".MJXc-TeX-unknown-BI": {"font-family":UNKNOWNFAMILY, "font-style":"italic","font-weight":"bold"},
"mjx-chartest": {
display:"block",
position:"absolute", top:0,
"line-height":"normal",
"font-size":"500%",
"font-family":UNKNOWNFAMILY
"font-size":"500%"
},
"mjx-chartest mjx-char": {display:"inline"},
"mjx-chartest mjx-box": {"padding-top": "500px"},
@ -526,6 +529,7 @@
// it isnt' found in the given variant.
//
lookupChar: function (variant,n) {
var VARIANT = variant;
while (variant) {
for (var i = 0, m = variant.fonts.length; i < m; i++) {
var font = this.FONTDATA.FONTS[variant.fonts[i]];
@ -544,28 +548,34 @@
}
variant = this.FONTDATA.VARIANT[variant.chain];
}
return this.unknownChar(variant,n);
return this.unknownChar(VARIANT,n);
},
//
// Create a fake font entry for an unknown character.
//
unknownChar: function (variant,n) {
HUB.signal.Post(["CommonHTML Jax - unknown char",n,variant]);
var id = ""; if (variant.bold) id += "B"; if (variant.italic) id += "I";
var unknown = this.FONTDATA.UNKNOWN[id||"R"]; // cache of previously measured characters
if (!unknown[n]) this.getUnknownChar(unknown,n);
return {type:"unknown", n:n, font:unknown};
},
getUnknownChar: function (unknown,n) {
var c = this.unicodeChar(n);
var HDW = this.getHDW(c); var a = (HDW.h-HDW.d)/2+AFUZZ; // ### FIXME: is this really the axis of the surrounding text?
var unknown = {type:"unknown", n:n, font:{className:"MJXc-TeX-unknown"}};
unknown.font[n] = [.8,.2,HDW.w,0,HDW.w,{a:a, A:HDW.h-a, d:HDW.d}];
unknown.font[n].c = c
return unknown;
var HDW = this.getHDW(c,unknown.className);
var a = (HDW.h-HDW.d)/2+AFUZZ; // ### FIXME: is this really the axis of the surrounding text?
// ### FIXME: provide a means of setting the height and depth for individual characters
unknown[n] = [.8,.2,HDW.w,0,HDW.w,{a:a, A:HDW.h-a, d:HDW.d}];
unknown[n].c = c;
},
//
// Get the height, depth and width of a character
// (height and depth are of the font, not the character).
// WARNING: causes reflow of the page!
//
getHDW: function (c) {
var test1 = HTML.addElement(document.body,"mjx-chartest",{},[["mjx-char",{},[c]]]);
var test2 = HTML.addElement(document.body,"mjx-chartest",{},[["mjx-char",{},[c,["mjx-box"]]]]);
getHDW: function (c,name) {
var test1 = HTML.addElement(document.body,"mjx-chartest",{className:name},[["mjx-char",{},[c]]]);
var test2 = HTML.addElement(document.body,"mjx-chartest",{className:name},[["mjx-char",{},[c,["mjx-box"]]]]);
var em = window.parseFloat(window.getComputedStyle(test1).fontSize);
var d = (test2.offsetHeight-500)/em;
var w = test1.offsetWidth/em, h = test1.offsetHeight/em - d;