@angular/compiler
Version:
Angular - the compiler library
129 lines • 20.1 kB
JavaScript
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define("@angular/compiler/src/render3/view/i18n/localize_utils", ["require", "exports", "@angular/compiler/src/output/output_ast", "@angular/compiler/src/parse_util", "@angular/compiler/src/render3/view/i18n/icu_serializer", "@angular/compiler/src/render3/view/i18n/util"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.serializeI18nMessageForLocalize = exports.createLocalizeStatements = void 0;
var o = require("@angular/compiler/src/output/output_ast");
var parse_util_1 = require("@angular/compiler/src/parse_util");
var icu_serializer_1 = require("@angular/compiler/src/render3/view/i18n/icu_serializer");
var util_1 = require("@angular/compiler/src/render3/view/i18n/util");
function createLocalizeStatements(variable, message, params) {
var _a = serializeI18nMessageForLocalize(message), messageParts = _a.messageParts, placeHolders = _a.placeHolders;
var sourceSpan = getSourceSpan(message);
var expressions = placeHolders.map(function (ph) { return params[ph.text]; });
var localizedString = o.localizedString(message, messageParts, placeHolders, expressions, sourceSpan);
var variableInitialization = variable.set(localizedString);
return [new o.ExpressionStatement(variableInitialization)];
}
exports.createLocalizeStatements = createLocalizeStatements;
/**
* This visitor walks over an i18n tree, capturing literal strings and placeholders.
*
* The result can be used for generating the `$localize` tagged template literals.
*/
var LocalizeSerializerVisitor = /** @class */ (function () {
function LocalizeSerializerVisitor() {
}
LocalizeSerializerVisitor.prototype.visitText = function (text, context) {
if (context[context.length - 1] instanceof o.LiteralPiece) {
// Two literal pieces in a row means that there was some comment node in-between.
context[context.length - 1].text += text.value;
}
else {
context.push(new o.LiteralPiece(text.value, text.sourceSpan));
}
};
LocalizeSerializerVisitor.prototype.visitContainer = function (container, context) {
var _this = this;
container.children.forEach(function (child) { return child.visit(_this, context); });
};
LocalizeSerializerVisitor.prototype.visitIcu = function (icu, context) {
context.push(new o.LiteralPiece(icu_serializer_1.serializeIcuNode(icu), icu.sourceSpan));
};
LocalizeSerializerVisitor.prototype.visitTagPlaceholder = function (ph, context) {
var _this = this;
var _a, _b;
context.push(this.createPlaceholderPiece(ph.startName, (_a = ph.startSourceSpan) !== null && _a !== void 0 ? _a : ph.sourceSpan));
if (!ph.isVoid) {
ph.children.forEach(function (child) { return child.visit(_this, context); });
context.push(this.createPlaceholderPiece(ph.closeName, (_b = ph.endSourceSpan) !== null && _b !== void 0 ? _b : ph.sourceSpan));
}
};
LocalizeSerializerVisitor.prototype.visitPlaceholder = function (ph, context) {
context.push(this.createPlaceholderPiece(ph.name, ph.sourceSpan));
};
LocalizeSerializerVisitor.prototype.visitIcuPlaceholder = function (ph, context) {
context.push(this.createPlaceholderPiece(ph.name, ph.sourceSpan));
};
LocalizeSerializerVisitor.prototype.createPlaceholderPiece = function (name, sourceSpan) {
return new o.PlaceholderPiece(util_1.formatI18nPlaceholderName(name, /* useCamelCase */ false), sourceSpan);
};
return LocalizeSerializerVisitor;
}());
var serializerVisitor = new LocalizeSerializerVisitor();
/**
* Serialize an i18n message into two arrays: messageParts and placeholders.
*
* These arrays will be used to generate `$localize` tagged template literals.
*
* @param message The message to be serialized.
* @returns an object containing the messageParts and placeholders.
*/
function serializeI18nMessageForLocalize(message) {
var pieces = [];
message.nodes.forEach(function (node) { return node.visit(serializerVisitor, pieces); });
return processMessagePieces(pieces);
}
exports.serializeI18nMessageForLocalize = serializeI18nMessageForLocalize;
function getSourceSpan(message) {
var startNode = message.nodes[0];
var endNode = message.nodes[message.nodes.length - 1];
return new parse_util_1.ParseSourceSpan(startNode.sourceSpan.start, endNode.sourceSpan.end, startNode.sourceSpan.fullStart, startNode.sourceSpan.details);
}
/**
* Convert the list of serialized MessagePieces into two arrays.
*
* One contains the literal string pieces and the other the placeholders that will be replaced by
* expressions when rendering `$localize` tagged template literals.
*
* @param pieces The pieces to process.
* @returns an object containing the messageParts and placeholders.
*/
function processMessagePieces(pieces) {
var messageParts = [];
var placeHolders = [];
if (pieces[0] instanceof o.PlaceholderPiece) {
// The first piece was a placeholder so we need to add an initial empty message part.
messageParts.push(createEmptyMessagePart(pieces[0].sourceSpan.start));
}
for (var i = 0; i < pieces.length; i++) {
var part = pieces[i];
if (part instanceof o.LiteralPiece) {
messageParts.push(part);
}
else {
placeHolders.push(part);
if (pieces[i - 1] instanceof o.PlaceholderPiece) {
// There were two placeholders in a row, so we need to add an empty message part.
messageParts.push(createEmptyMessagePart(pieces[i - 1].sourceSpan.end));
}
}
}
if (pieces[pieces.length - 1] instanceof o.PlaceholderPiece) {
// The last piece was a placeholder so we need to add a final empty message part.
messageParts.push(createEmptyMessagePart(pieces[pieces.length - 1].sourceSpan.end));
}
return { messageParts: messageParts, placeHolders: placeHolders };
}
function createEmptyMessagePart(location) {
return new o.LiteralPiece('', new parse_util_1.ParseSourceSpan(location, location));
}
});
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport * as i18n from '../../../i18n/i18n_ast';\nimport * as o from '../../../output/output_ast';\nimport {ParseLocation, ParseSourceSpan} from '../../../parse_util';\n\nimport {serializeIcuNode} from './icu_serializer';\nimport {formatI18nPlaceholderName} from './util';\n\nexport function createLocalizeStatements(\n    variable: o.ReadVarExpr, message: i18n.Message,\n    params: {[name: string]: o.Expression}): o.Statement[] {\n  const {messageParts, placeHolders} = serializeI18nMessageForLocalize(message);\n  const sourceSpan = getSourceSpan(message);\n  const expressions = placeHolders.map(ph => params[ph.text]);\n  const localizedString =\n      o.localizedString(message, messageParts, placeHolders, expressions, sourceSpan);\n  const variableInitialization = variable.set(localizedString);\n  return [new o.ExpressionStatement(variableInitialization)];\n}\n\n/**\n * This visitor walks over an i18n tree, capturing literal strings and placeholders.\n *\n * The result can be used for generating the `$localize` tagged template literals.\n */\nclass LocalizeSerializerVisitor implements i18n.Visitor {\n  visitText(text: i18n.Text, context: o.MessagePiece[]): any {\n    if (context[context.length - 1] instanceof o.LiteralPiece) {\n      // Two literal pieces in a row means that there was some comment node in-between.\n      context[context.length - 1].text += text.value;\n    } else {\n      context.push(new o.LiteralPiece(text.value, text.sourceSpan));\n    }\n  }\n\n  visitContainer(container: i18n.Container, context: o.MessagePiece[]): any {\n    container.children.forEach(child => child.visit(this, context));\n  }\n\n  visitIcu(icu: i18n.Icu, context: o.MessagePiece[]): any {\n    context.push(new o.LiteralPiece(serializeIcuNode(icu), icu.sourceSpan));\n  }\n\n  visitTagPlaceholder(ph: i18n.TagPlaceholder, context: o.MessagePiece[]): any {\n    context.push(this.createPlaceholderPiece(ph.startName, ph.startSourceSpan ?? ph.sourceSpan));\n    if (!ph.isVoid) {\n      ph.children.forEach(child => child.visit(this, context));\n      context.push(this.createPlaceholderPiece(ph.closeName, ph.endSourceSpan ?? ph.sourceSpan));\n    }\n  }\n\n  visitPlaceholder(ph: i18n.Placeholder, context: o.MessagePiece[]): any {\n    context.push(this.createPlaceholderPiece(ph.name, ph.sourceSpan));\n  }\n\n  visitIcuPlaceholder(ph: i18n.IcuPlaceholder, context?: any): any {\n    context.push(this.createPlaceholderPiece(ph.name, ph.sourceSpan));\n  }\n\n  private createPlaceholderPiece(name: string, sourceSpan: ParseSourceSpan): o.PlaceholderPiece {\n    return new o.PlaceholderPiece(\n        formatI18nPlaceholderName(name, /* useCamelCase */ false), sourceSpan);\n  }\n}\n\nconst serializerVisitor = new LocalizeSerializerVisitor();\n\n/**\n * Serialize an i18n message into two arrays: messageParts and placeholders.\n *\n * These arrays will be used to generate `$localize` tagged template literals.\n *\n * @param message The message to be serialized.\n * @returns an object containing the messageParts and placeholders.\n */\nexport function serializeI18nMessageForLocalize(message: i18n.Message):\n    {messageParts: o.LiteralPiece[], placeHolders: o.PlaceholderPiece[]} {\n  const pieces: o.MessagePiece[] = [];\n  message.nodes.forEach(node => node.visit(serializerVisitor, pieces));\n  return processMessagePieces(pieces);\n}\n\nfunction getSourceSpan(message: i18n.Message): ParseSourceSpan {\n  const startNode = message.nodes[0];\n  const endNode = message.nodes[message.nodes.length - 1];\n  return new ParseSourceSpan(\n      startNode.sourceSpan.start, endNode.sourceSpan.end, startNode.sourceSpan.fullStart,\n      startNode.sourceSpan.details);\n}\n\n/**\n * Convert the list of serialized MessagePieces into two arrays.\n *\n * One contains the literal string pieces and the other the placeholders that will be replaced by\n * expressions when rendering `$localize` tagged template literals.\n *\n * @param pieces The pieces to process.\n * @returns an object containing the messageParts and placeholders.\n */\nfunction processMessagePieces(pieces: o.MessagePiece[]):\n    {messageParts: o.LiteralPiece[], placeHolders: o.PlaceholderPiece[]} {\n  const messageParts: o.LiteralPiece[] = [];\n  const placeHolders: o.PlaceholderPiece[] = [];\n\n  if (pieces[0] instanceof o.PlaceholderPiece) {\n    // The first piece was a placeholder so we need to add an initial empty message part.\n    messageParts.push(createEmptyMessagePart(pieces[0].sourceSpan.start));\n  }\n\n  for (let i = 0; i < pieces.length; i++) {\n    const part = pieces[i];\n    if (part instanceof o.LiteralPiece) {\n      messageParts.push(part);\n    } else {\n      placeHolders.push(part);\n      if (pieces[i - 1] instanceof o.PlaceholderPiece) {\n        // There were two placeholders in a row, so we need to add an empty message part.\n        messageParts.push(createEmptyMessagePart(pieces[i - 1].sourceSpan.end));\n      }\n    }\n  }\n  if (pieces[pieces.length - 1] instanceof o.PlaceholderPiece) {\n    // The last piece was a placeholder so we need to add a final empty message part.\n    messageParts.push(createEmptyMessagePart(pieces[pieces.length - 1].sourceSpan.end));\n  }\n  return {messageParts, placeHolders};\n}\n\nfunction createEmptyMessagePart(location: ParseLocation): o.LiteralPiece {\n  return new o.LiteralPiece('', new ParseSourceSpan(location, location));\n}\n"]}