(cm)
| 498 | // size for the current document size. Returns true when an update |
| 499 | // is needed. |
| 500 | function maybeUpdateLineNumberWidth(cm) { |
| 501 | if (!cm.options.lineNumbers) return false; |
| 502 | var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display; |
| 503 | if (last.length != display.lineNumChars) { |
| 504 | var test = display.measure.appendChild(elt("div", [elt("div", last)], |
| 505 | "CodeMirror-linenumber CodeMirror-gutter-elt")); |
| 506 | var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW; |
| 507 | display.lineGutter.style.width = ""; |
| 508 | display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding); |
| 509 | display.lineNumWidth = display.lineNumInnerWidth + padding; |
| 510 | display.lineNumChars = display.lineNumInnerWidth ? last.length : -1; |
| 511 | display.lineGutter.style.width = display.lineNumWidth + "px"; |
| 512 | updateGutterSpace(cm); |
| 513 | return true; |
| 514 | } |
| 515 | return false; |
| 516 | } |
| 517 | |
| 518 | function lineNumberFor(options, i) { |
| 519 | return String(options.lineNumberFormatter(i + options.firstLineNumber)); |
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