react-native-mathjax-html-to-svg
Version:
React Native component to display mathematics in html using MathJax. Uses [MathJax](https://github.com/mathjax/)
139 lines (138 loc) • 5.49 kB
JavaScript
"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var __read = (this && this.__read) || function (o, n) {
var m = typeof Symbol === "function" && o[Symbol.iterator];
if (!m) return o;
var i = m.call(o), r, ar = [], e;
try {
while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
}
catch (error) { e = { error: error }; }
finally {
try {
if (r && !r.done && (m = i["return"])) m.call(i);
}
finally { if (e) throw e.error; }
}
return ar;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CommonMsubsupMixin = exports.CommonMsupMixin = exports.CommonMsubMixin = void 0;
function CommonMsubMixin(Base) {
return (function (_super) {
__extends(class_1, _super);
function class_1() {
return _super !== null && _super.apply(this, arguments) || this;
}
Object.defineProperty(class_1.prototype, "script", {
get: function () {
return this.childNodes[this.node.sub];
},
enumerable: false,
configurable: true
});
class_1.prototype.getOffset = function (bbox, sbox) {
return [0, -this.getV(bbox, sbox)];
};
return class_1;
}(Base));
}
exports.CommonMsubMixin = CommonMsubMixin;
function CommonMsupMixin(Base) {
return (function (_super) {
__extends(class_2, _super);
function class_2() {
return _super !== null && _super.apply(this, arguments) || this;
}
Object.defineProperty(class_2.prototype, "script", {
get: function () {
return this.childNodes[this.node.sup];
},
enumerable: false,
configurable: true
});
class_2.prototype.getOffset = function (bbox, sbox) {
var x = (this.baseCore.bbox.ic ? .05 * this.baseCore.bbox.ic + .05 : 0);
return [x * this.coreScale(), this.getU(bbox, sbox)];
};
return class_2;
}(Base));
}
exports.CommonMsupMixin = CommonMsupMixin;
function CommonMsubsupMixin(Base) {
return (function (_super) {
__extends(class_3, _super);
function class_3() {
var _this = _super !== null && _super.apply(this, arguments) || this;
_this.UVQ = null;
return _this;
}
Object.defineProperty(class_3.prototype, "subChild", {
get: function () {
return this.childNodes[this.node.sub];
},
enumerable: false,
configurable: true
});
Object.defineProperty(class_3.prototype, "supChild", {
get: function () {
return this.childNodes[this.node.sup];
},
enumerable: false,
configurable: true
});
class_3.prototype.computeBBox = function (bbox, recompute) {
if (recompute === void 0) { recompute = false; }
var basebox = this.baseChild.getBBox();
var subbox = this.subChild.getBBox();
var supbox = this.supChild.getBBox();
bbox.empty();
bbox.append(basebox);
var w = bbox.w;
var _a = __read(this.getUVQ(basebox, subbox, supbox), 2), u = _a[0], v = _a[1];
var x = (this.baseCore.bbox.ic ? this.coreIC() * this.coreScale() : 0);
bbox.combine(subbox, w, v);
bbox.combine(supbox, w + x, u);
bbox.w += this.font.params.scriptspace;
bbox.clean();
this.setChildPWidths(recompute);
};
class_3.prototype.getUVQ = function (basebox, subbox, supbox) {
if (this.UVQ)
return this.UVQ;
var tex = this.font.params;
var t = 3 * tex.rule_thickness;
var subscriptshift = this.length2em(this.node.attributes.get('subscriptshift'), tex.sub2);
var drop = (this.isCharBase() ? 0 : basebox.d * basebox.rscale + tex.sub_drop * subbox.rscale);
var _a = __read([this.getU(basebox, supbox), Math.max(drop, subscriptshift)], 2), u = _a[0], v = _a[1];
var q = (u - supbox.d * supbox.rscale) - (subbox.h * subbox.rscale - v);
if (q < t) {
v += t - q;
var p = (4 / 5) * tex.x_height - (u - supbox.d * supbox.rscale);
if (p > 0) {
u += p;
v -= p;
}
}
u = Math.max(this.length2em(this.node.attributes.get('superscriptshift'), u), u);
v = Math.max(this.length2em(this.node.attributes.get('subscriptshift'), v), v);
q = (u - supbox.d * supbox.rscale) - (subbox.h * subbox.rscale - v);
this.UVQ = [u, -v, q];
return this.UVQ;
};
return class_3;
}(Base));
}
exports.CommonMsubsupMixin = CommonMsubsupMixin;