(cm, oldN, newN, dir)
| 3337 | } |
| 3338 | |
| 3339 | function viewCuttingPoint(cm, oldN, newN, dir) { |
| 3340 | var index = findViewIndex(cm, oldN), diff, view = cm.display.view; |
| 3341 | if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size) |
| 3342 | return {index: index, lineN: newN}; |
| 3343 | for (var i = 0, n = cm.display.viewFrom; i < index; i++) |
| 3344 | n += view[i].size; |
| 3345 | if (n != oldN) { |
| 3346 | if (dir > 0) { |
| 3347 | if (index == view.length - 1) return null; |
| 3348 | diff = (n + view[index].size) - oldN; |
| 3349 | index++; |
| 3350 | } else { |
| 3351 | diff = n - oldN; |
| 3352 | } |
| 3353 | oldN += diff; newN += diff; |
| 3354 | } |
| 3355 | while (visualLineNo(cm.doc, newN) != newN) { |
| 3356 | if (index == (dir < 0 ? 0 : view.length - 1)) return null; |
| 3357 | newN += dir * view[index - (dir < 0 ? 1 : 0)].size; |
| 3358 | index += dir; |
| 3359 | } |
| 3360 | return {index: index, lineN: newN}; |
| 3361 | } |
| 3362 | |
| 3363 | // Force the view to cover a given range, adding empty view element |
| 3364 | // or clipping off existing ones as needed. |
no test coverage detected