From 9ed49e85e4108f729553c860465dc6a58085f319 Mon Sep 17 00:00:00 2001
From: "Davide P. Cervone" <dpvc@union.edu>
Date: Tue, 10 Mar 2015 13:38:23 -0400
Subject: [PATCH] Alter fonts to make ascent=descent so that line-height:0
 makes its axis along the baseline.  That should simplify things (though it
 may make unknown characters harder to handle -- we'll see).

---
 .../output/CommonHTML/fonts/TeX/fontdata.js    | 18 ------------------
 unpacked/jax/output/CommonHTML/jax.js          | 13 +++----------
 2 files changed, 3 insertions(+), 28 deletions(-)

diff --git a/unpacked/jax/output/CommonHTML/fonts/TeX/fontdata.js b/unpacked/jax/output/CommonHTML/fonts/TeX/fontdata.js
index c253ea12f..59261b9c9 100644
--- a/unpacked/jax/output/CommonHTML/fonts/TeX/fontdata.js
+++ b/unpacked/jax/output/CommonHTML/fonts/TeX/fontdata.js
@@ -586,8 +586,6 @@
 
   CHTML.FONTDATA.FONTS['MathJax_Caligraphic'] = {
     directory: 'Caligraphic/Regular',
-    ascent: .789,
-    descent: .216,
     skew: {
       0x41: 0.194,
       0x42: 0.139,
@@ -659,8 +657,6 @@
   CHTML.FONTDATA.FONTS['MathJax_Main-bold'] = {
     directory: 'Main/Bold',
     weight: 'bold',
-    ascent: .951,
-    descent: .267,
     skew: {
       0x131: 0.0319,
       0x237: 0.0958,
@@ -797,8 +793,6 @@
   CHTML.FONTDATA.FONTS['MathJax_Main-italic'] = {
     directory: 'Main/Italic',
     style: 'italic',
-    ascent: .750,
-    descent: .250,
     Ranges: [
       [0xA0,0xFF,"Latin1Supplement"],
       [0x300,0x36F,"CombDiacritMarks"],
@@ -910,8 +904,6 @@
 
   CHTML.FONTDATA.FONTS['MathJax_Main'] = {
     directory: 'Main/Regular',
-    ascent: .900,
-    descent: .272,
     skew: {
       0x131: 0.0278,
       0x237: 0.0833,
@@ -1192,8 +1184,6 @@
   CHTML.FONTDATA.FONTS['MathJax_Math-italic'] = {
     directory: 'Math/Italic',
     style: 'italic',
-    ascent: .717,
-    descent: .218,
     skew: {
       0x41: 0.139,
       0x42: 0.0833,
@@ -1372,8 +1362,6 @@
 
   CHTML.FONTDATA.FONTS['MathJax_Size1'] = {
     directory: 'Size1/Regular',
-    ascent: .850,
-    descent: .350,
     0x20: [0,0,250,0,0],               // SPACE
     0x28: [850,349,458,152,422],       // LEFT PARENTHESIS
     0x29: [850,349,458,35,305],        // RIGHT PARENTHESIS
@@ -1423,8 +1411,6 @@
 
   CHTML.FONTDATA.FONTS['MathJax_Size2'] = {
     directory: 'Size2/Regular',
-    ascent: 1.360,
-    descent: .862,
     0x20: [0,0,250,0,0],               // SPACE
     0x28: [1150,649,597,180,561],      // LEFT PARENTHESIS
     0x29: [1150,649,597,35,416],       // RIGHT PARENTHESIS
@@ -1466,8 +1452,6 @@
 
   CHTML.FONTDATA.FONTS['MathJax_Size3'] = {
     directory: 'Size3/Regular',
-    ascent: 1.450,
-    descent: .950,
     0x20: [0,0,250,0,0],               // SPACE
     0x28: [1450,949,736,209,701],      // LEFT PARENTHESIS
     0x29: [1450,949,736,34,526],       // RIGHT PARENTHESIS
@@ -1493,8 +1477,6 @@
 
   CHTML.FONTDATA.FONTS['MathJax_Size4'] = {
     directory: 'Size4/Regular',
-    ascent: 1.750,
-    descent: 1.250,
     0x20: [0,0,250,0,0],               // SPACE
     0x28: [1750,1249,792,237,758],     // LEFT PARENTHESIS
     0x29: [1750,1249,792,33,554],      // RIGHT PARENTHESIS
diff --git a/unpacked/jax/output/CommonHTML/jax.js b/unpacked/jax/output/CommonHTML/jax.js
index 98bc81540..b128efc5f 100644
--- a/unpacked/jax/output/CommonHTML/jax.js
+++ b/unpacked/jax/output/CommonHTML/jax.js
@@ -34,8 +34,7 @@
   var EVENT, TOUCH, HOVER; // filled in later
 
   var SCRIPTFACTOR = Math.sqrt(1/2),
-      AXISHEIGHT = .25,
-      HFUZZ = .05, DFUZZ = 0;  // adjustments to bounding box of character boxes
+      AXISHEIGHT = .25;
 
   var STYLES = {
     ".MathJax_CHTML_Display": {
@@ -558,14 +557,8 @@
       }
       this.addCharList(node.firstChild,list,bbox);
       this.cleanBBox(bbox);
-      bbox.h += HFUZZ; bbox.d += DFUZZ;
-      bbox.t += HFUZZ; bbox.b += DFUZZ;
-      var a = (bbox.H-bbox.D)/2;  // center of font (line-height:0)
-      if (a < bbox.h) {node.firstChild.style.paddingTop = this.Em(bbox.h-a)}
-        else {node.firstChild.style.marginTop = this.Em(bbox.h-a)}
-      // ### FIXME: Safari doesn't center, so clip bbox.d at 0 and adjust later?
-      if (bbox.d+1 > 0) {node.firstChild.style.paddingBottom = this.Em(bbox.d+a)}
-        else {node.firstChild.style.marginBottom = this.Em(bbox.d+a)}
+      node.firstChild.style.paddingTop = this.Em(bbox.h);
+      node.firstChild.style.paddingBottom = this.Em(bbox.d);
       return bbox;
     },