mirror of
https://gitee.com/onvia/ccc-tnt-psd2ui
synced 2024-12-27 12:07:45 +00:00
80 lines
2.3 KiB
JavaScript
80 lines
2.3 KiB
JavaScript
|
/* -*- Mode: js; js-indent-level: 2; -*- */
|
||
|
|
/*
|
||
|
|
* Copyright 2014 Mozilla Foundation and contributors
|
||
|
|
* Licensed under the New BSD license. See LICENSE or:
|
||
|
|
* http://opensource.org/licenses/BSD-3-Clause
|
||
|
|
*/
|
||
|
|
|
||
|
|
var util = require('./util');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Determine whether mappingB is after mappingA with respect to generated
|
||
|
|
* position.
|
||
|
|
*/
|
||
|
|
function generatedPositionAfter(mappingA, mappingB) {
|
||
|
|
// Optimized for most common case
|
||
|
|
var lineA = mappingA.generatedLine;
|
||
|
|
var lineB = mappingB.generatedLine;
|
||
|
|
var columnA = mappingA.generatedColumn;
|
||
|
|
var columnB = mappingB.generatedColumn;
|
||
|
|
return lineB > lineA || lineB == lineA && columnB >= columnA ||
|
||
|
|
util.compareByGeneratedPositionsInflated(mappingA, mappingB) <= 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A data structure to provide a sorted view of accumulated mappings in a
|
||
|
|
* performance conscious manner. It trades a neglibable overhead in general
|
||
|
|
* case for a large speedup in case of mappings being added in order.
|
||
|
|
*/
|
||
|
|
function MappingList() {
|
||
|
|
this._array = [];
|
||
|
|
this._sorted = true;
|
||
|
|
// Serves as infimum
|
||
|
|
this._last = {generatedLine: -1, generatedColumn: 0};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Iterate through internal items. This method takes the same arguments that
|
||
|
|
* `Array.prototype.forEach` takes.
|
||
|
|
*
|
||
|
|
* NOTE: The order of the mappings is NOT guaranteed.
|
||
|
|
*/
|
||
|
|
MappingList.prototype.unsortedForEach =
|
||
|
|
function MappingList_forEach(aCallback, aThisArg) {
|
||
|
|
this._array.forEach(aCallback, aThisArg);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Add the given source mapping.
|
||
|
|
*
|
||
|
|
* @param Object aMapping
|
||
|
|
*/
|
||
|
|
MappingList.prototype.add = function MappingList_add(aMapping) {
|
||
|
|
if (generatedPositionAfter(this._last, aMapping)) {
|
||
|
|
this._last = aMapping;
|
||
|
|
this._array.push(aMapping);
|
||
|
|
} else {
|
||
|
|
this._sorted = false;
|
||
|
|
this._array.push(aMapping);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the flat, sorted array of mappings. The mappings are sorted by
|
||
|
|
* generated position.
|
||
|
|
*
|
||
|
|
* WARNING: This method returns internal data without copying, for
|
||
|
|
* performance. The return value must NOT be mutated, and should be treated as
|
||
|
|
* an immutable borrow. If you want to take ownership, you must make your own
|
||
|
|
* copy.
|
||
|
|
*/
|
||
|
|
MappingList.prototype.toArray = function MappingList_toArray() {
|
||
|
|
if (!this._sorted) {
|
||
|
|
this._array.sort(util.compareByGeneratedPositionsInflated);
|
||
|
|
this._sorted = true;
|
||
|
|
}
|
||
|
|
return this._array;
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.MappingList = MappingList;
|