29 lines
892 B
JavaScript
29 lines
892 B
JavaScript
define([
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], function () {
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var module = { exports: {} };
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var transformCursor = function (cursor, op) {
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if (!op) { return cursor; }
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var pos = op.offset;
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var remove = op.toRemove;
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var insert = op.toInsert.length;
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if (typeof cursor === 'undefined') { return; }
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if (typeof remove === 'number' && pos < cursor) {
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cursor -= Math.min(remove, cursor - pos);
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}
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if (typeof insert === 'number' && pos < cursor) {
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cursor += insert;
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}
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return cursor;
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};
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module.exports.transformCursor = function (cursor, ops) {
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if (Array.isArray(ops)) {
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for (var i = ops.length - 1; i >= 0; i--) {
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cursor = transformCursor(cursor, ops[i]);
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}
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return cursor;
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}
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return transformCursor(ops);
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};
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return module.exports;
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});
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