| 198 | |
| 199 | |
| 200 | const getBaseElem = function getBaseElem(group) { |
| 201 | if (group.type === "ordgroup") { |
| 202 | if (group.body.length === 1) { |
| 203 | return getBaseElem(group.body[0]); |
| 204 | } else { |
| 205 | return group; |
| 206 | } |
| 207 | } else if (group.type === "color") { |
| 208 | if (group.body.length === 1) { |
| 209 | return getBaseElem(group.body[0]); |
| 210 | } else { |
| 211 | return group; |
| 212 | } |
| 213 | } else if (group.type === "font") { |
| 214 | return getBaseElem(group.body); |
| 215 | } else { |
| 216 | return group; |
| 217 | } |
| 218 | }; |
| 219 | /** |
| 220 | * TeXbook algorithms often reference "character boxes", which are simply groups |
| 221 | * with a single character in them. To decide if something is a character box, |