angular2
Version:
Angular 2 - a web framework for modern web apps
159 lines • 28.5 kB
JavaScript
import { StringWrapper } from 'angular2/src/facade/lang';
import { ListWrapper, Map } from 'angular2/src/facade/collection';
// The names of these fields must be kept in sync with abstract_change_detector.ts or change
// detection will fail.
const _STATE_ACCESSOR = "state";
const _CONTEXT_ACCESSOR = "context";
const _PROP_BINDING_INDEX = "propertyBindingIndex";
const _DIRECTIVES_ACCESSOR = "directiveIndices";
const _DISPATCHER_ACCESSOR = "dispatcher";
const _LOCALS_ACCESSOR = "locals";
const _MODE_ACCESSOR = "mode";
const _PIPES_ACCESSOR = "pipes";
const _PROTOS_ACCESSOR = "protos";
export const CONTEXT_ACCESSOR = "context";
// `context` is always first.
export const CONTEXT_INDEX = 0;
const _FIELD_PREFIX = 'this.';
var _whiteSpaceRegExp = /\W/g;
/**
* Returns `s` with all non-identifier characters removed.
*/
export function sanitizeName(s) {
return StringWrapper.replaceAll(s, _whiteSpaceRegExp, '');
}
/**
* Class responsible for providing field and local variable names for change detector classes.
* Also provides some convenience functions, for example, declaring variables, destroying pipes,
* and dehydrating the detector.
*/
export class CodegenNameUtil {
constructor(_records, _eventBindings, _directiveRecords, _utilName) {
this._records = _records;
this._eventBindings = _eventBindings;
this._directiveRecords = _directiveRecords;
this._utilName = _utilName;
/** @internal */
this._sanitizedEventNames = new Map();
this._sanitizedNames = ListWrapper.createFixedSize(this._records.length + 1);
this._sanitizedNames[CONTEXT_INDEX] = CONTEXT_ACCESSOR;
for (var i = 0, iLen = this._records.length; i < iLen; ++i) {
this._sanitizedNames[i + 1] = sanitizeName(`${this._records[i].name}${i}`);
}
for (var ebIndex = 0; ebIndex < _eventBindings.length; ++ebIndex) {
var eb = _eventBindings[ebIndex];
var names = [CONTEXT_ACCESSOR];
for (var i = 0, iLen = eb.records.length; i < iLen; ++i) {
names.push(sanitizeName(`${eb.records[i].name}${i}_${ebIndex}`));
}
this._sanitizedEventNames.set(eb, names);
}
}
/** @internal */
_addFieldPrefix(name) { return `${_FIELD_PREFIX}${name}`; }
getDispatcherName() { return this._addFieldPrefix(_DISPATCHER_ACCESSOR); }
getPipesAccessorName() { return this._addFieldPrefix(_PIPES_ACCESSOR); }
getProtosName() { return this._addFieldPrefix(_PROTOS_ACCESSOR); }
getDirectivesAccessorName() { return this._addFieldPrefix(_DIRECTIVES_ACCESSOR); }
getLocalsAccessorName() { return this._addFieldPrefix(_LOCALS_ACCESSOR); }
getStateName() { return this._addFieldPrefix(_STATE_ACCESSOR); }
getModeName() { return this._addFieldPrefix(_MODE_ACCESSOR); }
getPropertyBindingIndex() { return this._addFieldPrefix(_PROP_BINDING_INDEX); }
getLocalName(idx) { return `l_${this._sanitizedNames[idx]}`; }
getEventLocalName(eb, idx) {
return `l_${this._sanitizedEventNames.get(eb)[idx]}`;
}
getChangeName(idx) { return `c_${this._sanitizedNames[idx]}`; }
/**
* Generate a statement initializing local variables used when detecting changes.
*/
genInitLocals() {
var declarations = [];
var assignments = [];
for (var i = 0, iLen = this.getFieldCount(); i < iLen; ++i) {
if (i == CONTEXT_INDEX) {
declarations.push(`${this.getLocalName(i)} = ${this.getFieldName(i)}`);
}
else {
var rec = this._records[i - 1];
if (rec.argumentToPureFunction) {
var changeName = this.getChangeName(i);
declarations.push(`${this.getLocalName(i)},${changeName}`);
assignments.push(changeName);
}
else {
declarations.push(`${this.getLocalName(i)}`);
}
}
}
var assignmentsCode = ListWrapper.isEmpty(assignments) ? '' : `${assignments.join('=')} = false;`;
return `var ${declarations.join(',')};${assignmentsCode}`;
}
/**
* Generate a statement initializing local variables for event handlers.
*/
genInitEventLocals() {
var res = [`${this.getLocalName(CONTEXT_INDEX)} = ${this.getFieldName(CONTEXT_INDEX)}`];
this._sanitizedEventNames.forEach((names, eb) => {
for (var i = 0; i < names.length; ++i) {
if (i !== CONTEXT_INDEX) {
res.push(`${this.getEventLocalName(eb, i)}`);
}
}
});
return res.length > 1 ? `var ${res.join(',')};` : '';
}
getPreventDefaultAccesor() { return "preventDefault"; }
getFieldCount() { return this._sanitizedNames.length; }
getFieldName(idx) { return this._addFieldPrefix(this._sanitizedNames[idx]); }
getAllFieldNames() {
var fieldList = [];
for (var k = 0, kLen = this.getFieldCount(); k < kLen; ++k) {
if (k === 0 || this._records[k - 1].shouldBeChecked()) {
fieldList.push(this.getFieldName(k));
}
}
for (var i = 0, iLen = this._records.length; i < iLen; ++i) {
var rec = this._records[i];
if (rec.isPipeRecord()) {
fieldList.push(this.getPipeName(rec.selfIndex));
}
}
for (var j = 0, jLen = this._directiveRecords.length; j < jLen; ++j) {
var dRec = this._directiveRecords[j];
fieldList.push(this.getDirectiveName(dRec.directiveIndex));
if (!dRec.isDefaultChangeDetection()) {
fieldList.push(this.getDetectorName(dRec.directiveIndex));
}
}
return fieldList;
}
/**
* Generates statements which clear all fields so that the change detector is dehydrated.
*/
genDehydrateFields() {
var fields = this.getAllFieldNames();
ListWrapper.removeAt(fields, CONTEXT_INDEX);
if (ListWrapper.isEmpty(fields))
return '';
// At least one assignment.
fields.push(`${this._utilName}.uninitialized;`);
return fields.join(' = ');
}
/**
* Generates statements destroying all pipe variables.
*/
genPipeOnDestroy() {
return this._records.filter(r => r.isPipeRecord())
.map(r => `${this._utilName}.callPipeOnDestroy(${this.getPipeName(r.selfIndex)});`)
.join('\n');
}
getPipeName(idx) {
return this._addFieldPrefix(`${this._sanitizedNames[idx]}_pipe`);
}
getDirectiveName(d) {
return this._addFieldPrefix(`directive_${d.name}`);
}
getDetectorName(d) { return this._addFieldPrefix(`detector_${d.name}`); }
}
//# 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{RegExpWrapper, StringWrapper} from 'angular2/src/facade/lang';\nimport {ListWrapper, MapWrapper, Map} from 'angular2/src/facade/collection';\n\nimport {DirectiveIndex} from './directive_record';\n\nimport {ProtoRecord} from './proto_record';\nimport {EventBinding} from './event_binding';\n\n// The names of these fields must be kept in sync with abstract_change_detector.ts or change\n// detection will fail.\nconst _STATE_ACCESSOR = \"state\";\nconst _CONTEXT_ACCESSOR = \"context\";\nconst _PROP_BINDING_INDEX = \"propertyBindingIndex\";\nconst _DIRECTIVES_ACCESSOR = \"directiveIndices\";\nconst _DISPATCHER_ACCESSOR = \"dispatcher\";\nconst _LOCALS_ACCESSOR = \"locals\";\nconst _MODE_ACCESSOR = \"mode\";\nconst _PIPES_ACCESSOR = \"pipes\";\nconst _PROTOS_ACCESSOR = \"protos\";\nexport const CONTEXT_ACCESSOR = \"context\";\n\n// `context` is always first.\nexport const CONTEXT_INDEX = 0;\nconst _FIELD_PREFIX = 'this.';\n\nvar _whiteSpaceRegExp = /\\W/g;\n\n/**\n * Returns `s` with all non-identifier characters removed.\n */\nexport function sanitizeName(s: string): string {\n  return StringWrapper.replaceAll(s, _whiteSpaceRegExp, '');\n}\n\n/**\n * Class responsible for providing field and local variable names for change detector classes.\n * Also provides some convenience functions, for example, declaring variables, destroying pipes,\n * and dehydrating the detector.\n */\nexport class CodegenNameUtil {\n  /**\n   * Record names sanitized for use as fields.\n   * See [sanitizeName] for details.\n   * @internal\n   */\n  _sanitizedNames: string[];\n  /** @internal */\n  _sanitizedEventNames = new Map<EventBinding, string[]>();\n\n  constructor(private _records: ProtoRecord[], private _eventBindings: EventBinding[],\n              private _directiveRecords: any[], private _utilName: string) {\n    this._sanitizedNames = ListWrapper.createFixedSize(this._records.length + 1);\n    this._sanitizedNames[CONTEXT_INDEX] = CONTEXT_ACCESSOR;\n    for (var i = 0, iLen = this._records.length; i < iLen; ++i) {\n      this._sanitizedNames[i + 1] = sanitizeName(`${this._records[i].name}${i}`);\n    }\n\n    for (var ebIndex = 0; ebIndex < _eventBindings.length; ++ebIndex) {\n      var eb = _eventBindings[ebIndex];\n      var names = [CONTEXT_ACCESSOR];\n      for (var i = 0, iLen = eb.records.length; i < iLen; ++i) {\n        names.push(sanitizeName(`${eb.records[i].name}${i}_${ebIndex}`));\n      }\n      this._sanitizedEventNames.set(eb, names);\n    }\n  }\n\n  /** @internal */\n  _addFieldPrefix(name: string): string { return `${_FIELD_PREFIX}${name}`; }\n\n  getDispatcherName(): string { return this._addFieldPrefix(_DISPATCHER_ACCESSOR); }\n\n  getPipesAccessorName(): string { return this._addFieldPrefix(_PIPES_ACCESSOR); }\n\n  getProtosName(): string { return this._addFieldPrefix(_PROTOS_ACCESSOR); }\n\n  getDirectivesAccessorName(): string { return this._addFieldPrefix(_DIRECTIVES_ACCESSOR); }\n\n  getLocalsAccessorName(): string { return this._addFieldPrefix(_LOCALS_ACCESSOR); }\n\n  getStateName(): string { return this._addFieldPrefix(_STATE_ACCESSOR); }\n\n  getModeName(): string { return this._addFieldPrefix(_MODE_ACCESSOR); }\n\n  getPropertyBindingIndex(): string { return this._addFieldPrefix(_PROP_BINDING_INDEX); }\n\n  getLocalName(idx: number): string { return `l_${this._sanitizedNames[idx]}`; }\n\n  getEventLocalName(eb: EventBinding, idx: number): string {\n    return `l_${this._sanitizedEventNames.get(eb)[idx]}`;\n  }\n\n  getChangeName(idx: number): string { return `c_${this._sanitizedNames[idx]}`; }\n\n  /**\n   * Generate a statement initializing local variables used when detecting changes.\n   */\n  genInitLocals(): string {\n    var declarations = [];\n    var assignments = [];\n    for (var i = 0, iLen = this.getFieldCount(); i < iLen; ++i) {\n      if (i == CONTEXT_INDEX) {\n        declarations.push(`${this.getLocalName(i)} = ${this.getFieldName(i)}`);\n      } else {\n        var rec = this._records[i - 1];\n        if (rec.argumentToPureFunction) {\n          var changeName = this.getChangeName(i);\n          declarations.push(`${this.getLocalName(i)},${changeName}`);\n          assignments.push(changeName);\n        } else {\n          declarations.push(`${this.getLocalName(i)}`);\n        }\n      }\n    }\n    var assignmentsCode =\n        ListWrapper.isEmpty(assignments) ? '' : `${assignments.join('=')} = false;`;\n    return `var ${declarations.join(',')};${assignmentsCode}`;\n  }\n\n  /**\n   * Generate a statement initializing local variables for event handlers.\n   */\n  genInitEventLocals(): string {\n    var res = [`${this.getLocalName(CONTEXT_INDEX)} = ${this.getFieldName(CONTEXT_INDEX)}`];\n    this._sanitizedEventNames.forEach((names, eb) => {\n      for (var i = 0; i < names.length; ++i) {\n        if (i !== CONTEXT_INDEX) {\n          res.push(`${this.getEventLocalName(eb, i)}`);\n        }\n      }\n    });\n    return res.length > 1 ? `var ${res.join(',')};` : '';\n  }\n\n  getPreventDefaultAccesor(): string { return \"preventDefault\"; }\n\n  getFieldCount(): number { return this._sanitizedNames.length; }\n\n  getFieldName(idx: number): string { return this._addFieldPrefix(this._sanitizedNames[idx]); }\n\n  getAllFieldNames(): string[] {\n    var fieldList = [];\n    for (var k = 0, kLen = this.getFieldCount(); k < kLen; ++k) {\n      if (k === 0 || this._records[k - 1].shouldBeChecked()) {\n        fieldList.push(this.getFieldName(k));\n      }\n    }\n\n    for (var i = 0, iLen = this._records.length; i < iLen; ++i) {\n      var rec = this._records[i];\n      if (rec.isPipeRecord()) {\n        fieldList.push(this.getPipeName(rec.selfIndex));\n      }\n    }\n\n    for (var j = 0, jLen = this._directiveRecords.length; j < jLen; ++j) {\n      var dRec = this._directiveRecords[j];\n      fieldList.push(this.getDirectiveName(dRec.directiveIndex));\n      if (!dRec.isDefaultChangeDetection()) {\n        fieldList.push(this.getDetectorName(dRec.directiveIndex));\n      }\n    }\n    return fieldList;\n  }\n\n  /**\n   * Generates statements which clear all fields so that the change detector is dehydrated.\n   */\n  genDehydrateFields(): string {\n    var fields = this.getAllFieldNames();\n    ListWrapper.removeAt(fields, CONTEXT_INDEX);\n    if (ListWrapper.isEmpty(fields)) return '';\n\n    // At least one assignment.\n    fields.push(`${this._utilName}.uninitialized;`);\n    return fields.join(' = ');\n  }\n\n  /**\n   * Generates statements destroying all pipe variables.\n   */\n  genPipeOnDestroy(): string {\n    return this._records.filter(r => r.isPipeRecord())\n        .map(r => `${this._utilName}.callPipeOnDestroy(${this.getPipeName(r.selfIndex)});`)\n        .join('\\n');\n  }\n\n  getPipeName(idx: number): string {\n    return this._addFieldPrefix(`${this._sanitizedNames[idx]}_pipe`);\n  }\n\n  getDirectiveName(d: DirectiveIndex): string {\n    return this._addFieldPrefix(`directive_${d.name}`);\n  }\n\n  getDetectorName(d: DirectiveIndex): string { return this._addFieldPrefix(`detector_${d.name}`); }\n}\n"]}