suzanne.soy/scribble-math
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Refactor bounding box utility routines.

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This commit is contained in:
Davide P. Cervone 2015-03-04 12:51:09 -05:00
parent 96e8ce8410
commit 09aebdbf27
1 changed files with 22 additions and 10 deletions
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32
unpacked/jax/output/CommonHTML/jax.js
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@ -596,6 +596,21 @@
return parseFloat(m); return parseFloat(m);
}, },
zeroBBox: function () {
return {h:0, d:0, w:0, l:0, r:0, D:0, H:0};
},
emptyBBox: function () {
return {h:-BIGDIMEN, d:-BIGDIMEN, w:0, l:BIGDIMEN, r:-BIGDIMEN,
D:-BIGDIMEN, H:-BIGDIMEN};
},
cleanBBox: function (bbox) {
if (bbox.h === -BIGDIMEN) bbox.h = 0;
if (bbox.d === -BIGDIMEN) bbox.d = 0;
if (bbox.l === BIGDIMEN) bbox.l = 0;
if (bbox.r === -BIGDIMEN) bbox.r = 0;
if (bbox.H === -BIGDIMEN) bbox.H = .8;
if (bbox.D === -BIGDIMEN) bbox.D = .2;
},
scaleBBox: function (bbox,level,dlevel) { scaleBBox: function (bbox,level,dlevel) {
var scale = Math.pow(SCRIPTFACTOR,Math.min(2,level)-(dlevel||0)); var scale = Math.pow(SCRIPTFACTOR,Math.min(2,level)-(dlevel||0));
bbox.w *= scale; bbox.h *= scale; bbox.d *= scale; bbox.w *= scale; bbox.h *= scale; bbox.d *= scale;
@ -623,6 +638,7 @@
this.CHTMLhandleStyle(node); this.CHTMLhandleStyle(node);
this.CHTMLhandleColor(node); this.CHTMLhandleColor(node);
for (var i = 0, m = this.data.length; i < m; i++) this.CHTMLaddChild(node,i,options); for (var i = 0, m = this.data.length; i < m; i++) this.CHTMLaddChild(node,i,options);
if (!options.noBBox) CHTML.cleanBBox(this.CHTML);
return node; return node;
}, },
CHTMLaddChild: function (node,i,options) { CHTMLaddChild: function (node,i,options) {
@ -659,7 +675,7 @@
CHTMLcreateNode: function (node) { CHTMLcreateNode: function (node) {
if (!this.CHTML) this.CHTML = {}; if (!this.CHTML) this.CHTML = {};
this.CHTML = {w:0, h:0, d:0, l:0, r:0}; this.CHTML = CHTML.zeroBBox();
if (this.inferred) return node; if (this.inferred) return node;
if (!this.CHTMLnodeID) {this.CHTMLnodeID = CHTML.GetID()}; if (!this.CHTMLnodeID) {this.CHTMLnodeID = CHTML.GetID()};
var id = (this.id || "MJXc-Node-"+this.CHTMLnodeID); var id = (this.id || "MJXc-Node-"+this.CHTMLnodeID);
@ -707,8 +723,7 @@
CHTMLhandleText: function (node,text,variant) { CHTMLhandleText: function (node,text,variant) {
if (node.childNodes.length === 0) { if (node.childNodes.length === 0) {
HTML.addElement(node,"mjx-char"); HTML.addElement(node,"mjx-char");
this.CHTML = {h:-BIGDIMEN, d:-BIGDIMEN, w:0, l:BIGDIMEN, r:-BIGDIMEN, this.CHTML = CHTML.emptyBBox();
D:-BIGDIMEN, H:-BIGDIMEN};
} }
var bbox = this.CHTML, string = {text:text, i:0, length:text.length}; var bbox = this.CHTML, string = {text:text, i:0, length:text.length};
if (typeof(variant) === "string") variant = CHTML.FONTDATA.VARIANT[variant]; if (typeof(variant) === "string") variant = CHTML.FONTDATA.VARIANT[variant];
@ -719,12 +734,7 @@
list.push.apply(list,CHTML.getCharList(variant,n)); list.push.apply(list,CHTML.getCharList(variant,n));
} }
CHTML.addCharList(node.firstChild,list,bbox); CHTML.addCharList(node.firstChild,list,bbox);
if (bbox.h === -BIGDIMEN) bbox.h = 0; CHTML.cleanBBox(bbox);
if (bbox.d === -BIGDIMEN) bbox.d = 0;
if (bbox.l === BIGDIMEN) bbox.l = 0;
if (bbox.r === -BIGDIMEN) bbox.r = 0;
if (bbox.H === -BIGDIMEN) bbox.H = .8;
if (bbox.D === -BIGDIMEN) bbox.D = .2;
bbox.h += HFUZZ; bbox.d += DFUZZ; bbox.h += HFUZZ; bbox.d += DFUZZ;
var a = (bbox.H-bbox.D)/2; // center of font (line-height:0) var a = (bbox.H-bbox.D)/2; // center of font (line-height:0)
node.firstChild.style.marginTop = CHTML.Em(bbox.h-a); node.firstChild.style.marginTop = CHTML.Em(bbox.h-a);
@ -733,7 +743,7 @@
CHTMLbboxFor: function (n) { CHTMLbboxFor: function (n) {
if (this.data[n] && this.data[n].CHTML) return this.data[n].CHTML; if (this.data[n] && this.data[n].CHTML) return this.data[n].CHTML;
return {w:0, h:0, d:0, l:0, r:0}; return CHTML.zeroBBox();
}, },
// //
// Debugging function to see if internal BBox matches actual bbox // Debugging function to see if internal BBox matches actual bbox
@ -814,6 +824,7 @@
this.CHTMLadjustAccent(values); this.CHTMLadjustAccent(values);
this.CHTMLadjustVariant(values); this.CHTMLadjustVariant(values);
this.CHTML = CHTML.emptyBBox();
for (var i = 0, m = this.data.length; i < m; i++) { for (var i = 0, m = this.data.length; i < m; i++) {
this.CHTMLaddChild(node,i,{childOptions:{ this.CHTMLaddChild(node,i,{childOptions:{
variant: values.mathvariant, variant: values.mathvariant,
@ -823,6 +834,7 @@
} }
if (values.text.length !== 1) delete this.CHTML.skew; if (values.text.length !== 1) delete this.CHTML.skew;
if (values.largeop) this.CHTMLcenterOp(node); if (values.largeop) this.CHTMLcenterOp(node);
CHTML.cleanBBox(this.CHTML);
this.CHTMLhandleSpace(node); this.CHTMLhandleSpace(node);
this.CHTMLhandleStyle(node); this.CHTMLhandleStyle(node);