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var LF = '\n';
var CR = '\r';
1 year ago
var LinesAndColumns = (function () {
function LinesAndColumns(string) {
this.string = string;
var offsets = [0];
for (var offset = 0; offset < string.length;) {
switch (string[offset]) {
case LF:
offset += LF.length;
offsets.push(offset);
break;
case CR:
offset += CR.length;
if (string[offset] === LF) {
offset += LF.length;
}
offsets.push(offset);
break;
default:
offset++;
break;
}
}
this.offsets = offsets;
}
LinesAndColumns.prototype.locationForIndex = function (index) {
if (index < 0 || index > this.string.length) {
return null;
}
var line = 0;
var offsets = this.offsets;
while (offsets[line + 1] <= index) {
line++;
}
var column = index - offsets[line];
return { line: line, column: column };
};
LinesAndColumns.prototype.indexForLocation = function (location) {
var line = location.line, column = location.column;
if (line < 0 || line >= this.offsets.length) {
return null;
}
if (column < 0 || column > this.lengthOfLine(line)) {
return null;
}
return this.offsets[line] + column;
};
LinesAndColumns.prototype.lengthOfLine = function (line) {
var offset = this.offsets[line];
1 year ago
var nextOffset = line === this.offsets.length - 1 ? this.string.length : this.offsets[line + 1];
return nextOffset - offset;
};
return LinesAndColumns;
}());
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export default LinesAndColumns;