angular2
Version:
Angular 2 - a web framework for modern web apps
145 lines • 24.8 kB
JavaScript
;var lang_1 = require('angular2/src/facade/lang');
var collection_1 = require('angular2/src/facade/collection');
var proto_record_1 = require('./proto_record');
/**
* Removes "duplicate" records. It assumes that record evaluation does not have side-effects.
*
* Records that are not last in bindings are removed and all the indices of the records that depend
* on them are updated.
*
* Records that are last in bindings CANNOT be removed, and instead are replaced with very cheap
* SELF records.
*
* @internal
*/
function coalesce(srcRecords) {
var dstRecords = [];
var excludedIdxs = [];
var indexMap = new collection_1.Map();
var skipDepth = 0;
var skipSources = collection_1.ListWrapper.createFixedSize(srcRecords.length);
for (var protoIndex = 0; protoIndex < srcRecords.length; protoIndex++) {
var skipRecord = skipSources[protoIndex];
if (lang_1.isPresent(skipRecord)) {
skipDepth--;
skipRecord.fixedArgs[0] = dstRecords.length;
}
var src = srcRecords[protoIndex];
var dst = _cloneAndUpdateIndexes(src, dstRecords, indexMap);
if (dst.isSkipRecord()) {
dstRecords.push(dst);
skipDepth++;
skipSources[dst.fixedArgs[0]] = dst;
}
else {
var record = _mayBeAddRecord(dst, dstRecords, excludedIdxs, skipDepth > 0);
indexMap.set(src.selfIndex, record.selfIndex);
}
}
return _optimizeSkips(dstRecords);
}
exports.coalesce = coalesce;
/**
* - Conditional skip of 1 record followed by an unconditional skip of N are replaced by a
* conditional skip of N with the negated condition,
* - Skips of 0 records are removed
*/
function _optimizeSkips(srcRecords) {
var dstRecords = [];
var skipSources = collection_1.ListWrapper.createFixedSize(srcRecords.length);
var indexMap = new collection_1.Map();
for (var protoIndex = 0; protoIndex < srcRecords.length; protoIndex++) {
var skipRecord = skipSources[protoIndex];
if (lang_1.isPresent(skipRecord)) {
skipRecord.fixedArgs[0] = dstRecords.length;
}
var src = srcRecords[protoIndex];
if (src.isSkipRecord()) {
if (src.isConditionalSkipRecord() && src.fixedArgs[0] === protoIndex + 2 &&
protoIndex < srcRecords.length - 1 &&
srcRecords[protoIndex + 1].mode === proto_record_1.RecordType.SkipRecords) {
src.mode = src.mode === proto_record_1.RecordType.SkipRecordsIf ? proto_record_1.RecordType.SkipRecordsIfNot :
proto_record_1.RecordType.SkipRecordsIf;
src.fixedArgs[0] = srcRecords[protoIndex + 1].fixedArgs[0];
protoIndex++;
}
if (src.fixedArgs[0] > protoIndex + 1) {
var dst = _cloneAndUpdateIndexes(src, dstRecords, indexMap);
dstRecords.push(dst);
skipSources[dst.fixedArgs[0]] = dst;
}
}
else {
var dst = _cloneAndUpdateIndexes(src, dstRecords, indexMap);
dstRecords.push(dst);
indexMap.set(src.selfIndex, dst.selfIndex);
}
}
return dstRecords;
}
/**
* Add a new record or re-use one of the existing records.
*/
function _mayBeAddRecord(record, dstRecords, excludedIdxs, excluded) {
var match = _findFirstMatch(record, dstRecords, excludedIdxs);
if (lang_1.isPresent(match)) {
if (record.lastInBinding) {
dstRecords.push(_createSelfRecord(record, match.selfIndex, dstRecords.length + 1));
match.referencedBySelf = true;
}
else {
if (record.argumentToPureFunction) {
match.argumentToPureFunction = true;
}
}
return match;
}
if (excluded) {
excludedIdxs.push(record.selfIndex);
}
dstRecords.push(record);
return record;
}
/**
* Returns the first `ProtoRecord` that matches the record.
*/
function _findFirstMatch(record, dstRecords, excludedIdxs) {
return dstRecords.find(
// TODO(vicb): optimize excludedIdxs.indexOf (sorted array)
function (rr) { return excludedIdxs.indexOf(rr.selfIndex) == -1 && rr.mode !== proto_record_1.RecordType.DirectiveLifecycle &&
_haveSameDirIndex(rr, record) && rr.mode === record.mode &&
lang_1.looseIdentical(rr.funcOrValue, record.funcOrValue) &&
rr.contextIndex === record.contextIndex && lang_1.looseIdentical(rr.name, record.name) &&
collection_1.ListWrapper.equals(rr.args, record.args); });
}
/**
* Clone the `ProtoRecord` and changes the indexes for the ones in the destination array for:
* - the arguments,
* - the context,
* - self
*/
function _cloneAndUpdateIndexes(record, dstRecords, indexMap) {
var args = record.args.map(function (src) { return _srcToDstSelfIndex(indexMap, src); });
var contextIndex = _srcToDstSelfIndex(indexMap, record.contextIndex);
var selfIndex = dstRecords.length + 1;
return new proto_record_1.ProtoRecord(record.mode, record.name, record.funcOrValue, args, record.fixedArgs, contextIndex, record.directiveIndex, selfIndex, record.bindingRecord, record.lastInBinding, record.lastInDirective, record.argumentToPureFunction, record.referencedBySelf, record.propertyBindingIndex);
}
/**
* Returns the index in the destination array corresponding to the index in the src array.
* When the element is not present in the destination array, return the source index.
*/
function _srcToDstSelfIndex(indexMap, srcIdx) {
var dstIdx = indexMap.get(srcIdx);
return lang_1.isPresent(dstIdx) ? dstIdx : srcIdx;
}
function _createSelfRecord(r, contextIndex, selfIndex) {
return new proto_record_1.ProtoRecord(proto_record_1.RecordType.Self, "self", null, [], r.fixedArgs, contextIndex, r.directiveIndex, selfIndex, r.bindingRecord, r.lastInBinding, r.lastInDirective, false, false, r.propertyBindingIndex);
}
function _haveSameDirIndex(a, b) {
var di1 = lang_1.isBlank(a.directiveIndex) ? null : a.directiveIndex.directiveIndex;
var ei1 = lang_1.isBlank(a.directiveIndex) ? null : a.directiveIndex.elementIndex;
var di2 = lang_1.isBlank(b.directiveIndex) ? null : b.directiveIndex.directiveIndex;
var ei2 = lang_1.isBlank(b.directiveIndex) ? null : b.directiveIndex.elementIndex;
return di1 === di2 && ei1 === ei2;
}
//# 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{isPresent, isBlank, looseIdentical} from 'angular2/src/facade/lang';\nimport {ListWrapper, Map} from 'angular2/src/facade/collection';\nimport {RecordType, ProtoRecord} from './proto_record';\n\n/**\n * Removes \"duplicate\" records. It assumes that record evaluation does not have side-effects.\n *\n * Records that are not last in bindings are removed and all the indices of the records that depend\n * on them are updated.\n *\n * Records that are last in bindings CANNOT be removed, and instead are replaced with very cheap\n * SELF records.\n *\n * @internal\n */\nexport function coalesce(srcRecords: ProtoRecord[]): ProtoRecord[] {\n  let dstRecords = [];\n  let excludedIdxs = [];\n  let indexMap: Map<number, number> = new Map<number, number>();\n  let skipDepth = 0;\n  let skipSources: ProtoRecord[] = ListWrapper.createFixedSize(srcRecords.length);\n\n  for (let protoIndex = 0; protoIndex < srcRecords.length; protoIndex++) {\n    let skipRecord = skipSources[protoIndex];\n    if (isPresent(skipRecord)) {\n      skipDepth--;\n      skipRecord.fixedArgs[0] = dstRecords.length;\n    }\n\n    let src = srcRecords[protoIndex];\n    let dst = _cloneAndUpdateIndexes(src, dstRecords, indexMap);\n\n    if (dst.isSkipRecord()) {\n      dstRecords.push(dst);\n      skipDepth++;\n      skipSources[dst.fixedArgs[0]] = dst;\n    } else {\n      let record = _mayBeAddRecord(dst, dstRecords, excludedIdxs, skipDepth > 0);\n      indexMap.set(src.selfIndex, record.selfIndex);\n    }\n  }\n\n  return _optimizeSkips(dstRecords);\n}\n\n/**\n * - Conditional skip of 1 record followed by an unconditional skip of N are replaced by  a\n *   conditional skip of N with the negated condition,\n * - Skips of 0 records are removed\n */\nfunction _optimizeSkips(srcRecords: ProtoRecord[]): ProtoRecord[] {\n  let dstRecords = [];\n  let skipSources = ListWrapper.createFixedSize(srcRecords.length);\n  let indexMap: Map<number, number> = new Map<number, number>();\n\n  for (let protoIndex = 0; protoIndex < srcRecords.length; protoIndex++) {\n    let skipRecord = skipSources[protoIndex];\n    if (isPresent(skipRecord)) {\n      skipRecord.fixedArgs[0] = dstRecords.length;\n    }\n\n    let src = srcRecords[protoIndex];\n\n    if (src.isSkipRecord()) {\n      if (src.isConditionalSkipRecord() && src.fixedArgs[0] === protoIndex + 2 &&\n          protoIndex < srcRecords.length - 1 &&\n          srcRecords[protoIndex + 1].mode === RecordType.SkipRecords) {\n        src.mode = src.mode === RecordType.SkipRecordsIf ? RecordType.SkipRecordsIfNot :\n                                                           RecordType.SkipRecordsIf;\n        src.fixedArgs[0] = srcRecords[protoIndex + 1].fixedArgs[0];\n        protoIndex++;\n      }\n\n      if (src.fixedArgs[0] > protoIndex + 1) {\n        let dst = _cloneAndUpdateIndexes(src, dstRecords, indexMap);\n        dstRecords.push(dst);\n        skipSources[dst.fixedArgs[0]] = dst;\n      }\n\n    } else {\n      let dst = _cloneAndUpdateIndexes(src, dstRecords, indexMap);\n      dstRecords.push(dst);\n      indexMap.set(src.selfIndex, dst.selfIndex);\n    }\n  }\n\n  return dstRecords;\n}\n\n/**\n * Add a new record or re-use one of the existing records.\n */\nfunction _mayBeAddRecord(record: ProtoRecord, dstRecords: ProtoRecord[], excludedIdxs: number[],\n                         excluded: boolean): ProtoRecord {\n  let match = _findFirstMatch(record, dstRecords, excludedIdxs);\n\n  if (isPresent(match)) {\n    if (record.lastInBinding) {\n      dstRecords.push(_createSelfRecord(record, match.selfIndex, dstRecords.length + 1));\n      match.referencedBySelf = true;\n    } else {\n      if (record.argumentToPureFunction) {\n        match.argumentToPureFunction = true;\n      }\n    }\n\n    return match;\n  }\n\n  if (excluded) {\n    excludedIdxs.push(record.selfIndex);\n  }\n\n  dstRecords.push(record);\n  return record;\n}\n\n/**\n * Returns the first `ProtoRecord` that matches the record.\n */\nfunction _findFirstMatch(record: ProtoRecord, dstRecords: ProtoRecord[],\n                         excludedIdxs: number[]): ProtoRecord {\n  return dstRecords.find(\n      // TODO(vicb): optimize excludedIdxs.indexOf (sorted array)\n      rr => excludedIdxs.indexOf(rr.selfIndex) == -1 && rr.mode !== RecordType.DirectiveLifecycle &&\n            _haveSameDirIndex(rr, record) && rr.mode === record.mode &&\n            looseIdentical(rr.funcOrValue, record.funcOrValue) &&\n            rr.contextIndex === record.contextIndex && looseIdentical(rr.name, record.name) &&\n            ListWrapper.equals(rr.args, record.args));\n}\n\n/**\n * Clone the `ProtoRecord` and changes the indexes for the ones in the destination array for:\n * - the arguments,\n * - the context,\n * - self\n */\nfunction _cloneAndUpdateIndexes(record: ProtoRecord, dstRecords: ProtoRecord[],\n                                indexMap: Map<number, number>): ProtoRecord {\n  let args = record.args.map(src => _srcToDstSelfIndex(indexMap, src));\n  let contextIndex = _srcToDstSelfIndex(indexMap, record.contextIndex);\n  let selfIndex = dstRecords.length + 1;\n\n  return new ProtoRecord(record.mode, record.name, record.funcOrValue, args, record.fixedArgs,\n                         contextIndex, record.directiveIndex, selfIndex, record.bindingRecord,\n                         record.lastInBinding, record.lastInDirective,\n                         record.argumentToPureFunction, record.referencedBySelf,\n                         record.propertyBindingIndex);\n}\n\n/**\n * Returns the index in the destination array corresponding to the index in the src array.\n * When the element is not present in the destination array, return the source index.\n */\nfunction _srcToDstSelfIndex(indexMap: Map<number, number>, srcIdx: number): number {\n  var dstIdx = indexMap.get(srcIdx);\n  return isPresent(dstIdx) ? dstIdx : srcIdx;\n}\n\nfunction _createSelfRecord(r: ProtoRecord, contextIndex: number, selfIndex: number): ProtoRecord {\n  return new ProtoRecord(RecordType.Self, \"self\", null, [], r.fixedArgs, contextIndex,\n                         r.directiveIndex, selfIndex, r.bindingRecord, r.lastInBinding,\n                         r.lastInDirective, false, false, r.propertyBindingIndex);\n}\n\nfunction _haveSameDirIndex(a: ProtoRecord, b: ProtoRecord): boolean {\n  var di1 = isBlank(a.directiveIndex) ? null : a.directiveIndex.directiveIndex;\n  var ei1 = isBlank(a.directiveIndex) ? null : a.directiveIndex.elementIndex;\n\n  var di2 = isBlank(b.directiveIndex) ? null : b.directiveIndex.directiveIndex;\n  var ei2 = isBlank(b.directiveIndex) ? null : b.directiveIndex.elementIndex;\n\n  return di1 === di2 && ei1 === ei2;\n}\n"]}