@angular/compiler
Version:
Angular - the compiler library
140 lines • 24.9 kB
JavaScript
/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
(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/i18n/i18n_parser", ["require", "exports", "@angular/compiler/src/expression_parser/lexer", "@angular/compiler/src/expression_parser/parser", "@angular/compiler/src/ml_parser/ast", "@angular/compiler/src/ml_parser/html_tags", "@angular/compiler/src/i18n/i18n_ast", "@angular/compiler/src/i18n/serializers/placeholder"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var lexer_1 = require("@angular/compiler/src/expression_parser/lexer");
var parser_1 = require("@angular/compiler/src/expression_parser/parser");
var html = require("@angular/compiler/src/ml_parser/ast");
var html_tags_1 = require("@angular/compiler/src/ml_parser/html_tags");
var i18n = require("@angular/compiler/src/i18n/i18n_ast");
var placeholder_1 = require("@angular/compiler/src/i18n/serializers/placeholder");
var _expParser = new parser_1.Parser(new lexer_1.Lexer());
/**
* Returns a function converting html nodes to an i18n Message given an interpolationConfig
*/
function createI18nMessageFactory(interpolationConfig) {
var visitor = new _I18nVisitor(_expParser, interpolationConfig);
return function (nodes, meaning, description, id) {
return visitor.toI18nMessage(nodes, meaning, description, id);
};
}
exports.createI18nMessageFactory = createI18nMessageFactory;
var _I18nVisitor = /** @class */ (function () {
function _I18nVisitor(_expressionParser, _interpolationConfig) {
this._expressionParser = _expressionParser;
this._interpolationConfig = _interpolationConfig;
}
_I18nVisitor.prototype.toI18nMessage = function (nodes, meaning, description, id) {
this._isIcu = nodes.length == 1 && nodes[0] instanceof html.Expansion;
this._icuDepth = 0;
this._placeholderRegistry = new placeholder_1.PlaceholderRegistry();
this._placeholderToContent = {};
this._placeholderToMessage = {};
var i18nodes = html.visitAll(this, nodes, {});
return new i18n.Message(i18nodes, this._placeholderToContent, this._placeholderToMessage, meaning, description, id);
};
_I18nVisitor.prototype.visitElement = function (el, context) {
var children = html.visitAll(this, el.children);
var attrs = {};
el.attrs.forEach(function (attr) {
// Do not visit the attributes, translatable ones are top-level ASTs
attrs[attr.name] = attr.value;
});
var isVoid = html_tags_1.getHtmlTagDefinition(el.name).isVoid;
var startPhName = this._placeholderRegistry.getStartTagPlaceholderName(el.name, attrs, isVoid);
this._placeholderToContent[startPhName] = el.sourceSpan.toString();
var closePhName = '';
if (!isVoid) {
closePhName = this._placeholderRegistry.getCloseTagPlaceholderName(el.name);
this._placeholderToContent[closePhName] = "</" + el.name + ">";
}
return new i18n.TagPlaceholder(el.name, attrs, startPhName, closePhName, children, isVoid, el.sourceSpan);
};
_I18nVisitor.prototype.visitAttribute = function (attribute, context) {
return this._visitTextWithInterpolation(attribute.value, attribute.sourceSpan);
};
_I18nVisitor.prototype.visitText = function (text, context) {
return this._visitTextWithInterpolation(text.value, text.sourceSpan);
};
_I18nVisitor.prototype.visitComment = function (comment, context) { return null; };
_I18nVisitor.prototype.visitExpansion = function (icu, context) {
var _this = this;
this._icuDepth++;
var i18nIcuCases = {};
var i18nIcu = new i18n.Icu(icu.switchValue, icu.type, i18nIcuCases, icu.sourceSpan);
icu.cases.forEach(function (caze) {
i18nIcuCases[caze.value] = new i18n.Container(caze.expression.map(function (node) { return node.visit(_this, {}); }), caze.expSourceSpan);
});
this._icuDepth--;
if (this._isIcu || this._icuDepth > 0) {
// Returns an ICU node when:
// - the message (vs a part of the message) is an ICU message, or
// - the ICU message is nested.
var expPh = this._placeholderRegistry.getUniquePlaceholder("VAR_" + icu.type);
i18nIcu.expressionPlaceholder = expPh;
this._placeholderToContent[expPh] = icu.switchValue;
return i18nIcu;
}
// Else returns a placeholder
// ICU placeholders should not be replaced with their original content but with the their
// translations. We need to create a new visitor (they are not re-entrant) to compute the
// message id.
// TODO(vicb): add a html.Node -> i18n.Message cache to avoid having to re-create the msg
var phName = this._placeholderRegistry.getPlaceholderName('ICU', icu.sourceSpan.toString());
var visitor = new _I18nVisitor(this._expressionParser, this._interpolationConfig);
this._placeholderToMessage[phName] = visitor.toI18nMessage([icu], '', '', '');
return new i18n.IcuPlaceholder(i18nIcu, phName, icu.sourceSpan);
};
_I18nVisitor.prototype.visitExpansionCase = function (icuCase, context) {
throw new Error('Unreachable code');
};
_I18nVisitor.prototype._visitTextWithInterpolation = function (text, sourceSpan) {
var splitInterpolation = this._expressionParser.splitInterpolation(text, sourceSpan.start.toString(), this._interpolationConfig);
if (!splitInterpolation) {
// No expression, return a single text
return new i18n.Text(text, sourceSpan);
}
// Return a group of text + expressions
var nodes = [];
var container = new i18n.Container(nodes, sourceSpan);
var _a = this._interpolationConfig, sDelimiter = _a.start, eDelimiter = _a.end;
for (var i = 0; i < splitInterpolation.strings.length - 1; i++) {
var expression = splitInterpolation.expressions[i];
var baseName = _extractPlaceholderName(expression) || 'INTERPOLATION';
var phName = this._placeholderRegistry.getPlaceholderName(baseName, expression);
if (splitInterpolation.strings[i].length) {
// No need to add empty strings
nodes.push(new i18n.Text(splitInterpolation.strings[i], sourceSpan));
}
nodes.push(new i18n.Placeholder(expression, phName, sourceSpan));
this._placeholderToContent[phName] = sDelimiter + expression + eDelimiter;
}
// The last index contains no expression
var lastStringIdx = splitInterpolation.strings.length - 1;
if (splitInterpolation.strings[lastStringIdx].length) {
nodes.push(new i18n.Text(splitInterpolation.strings[lastStringIdx], sourceSpan));
}
return container;
};
return _I18nVisitor;
}());
var _CUSTOM_PH_EXP = /\/\/[\s\S]*i18n[\s\S]*\([\s\S]*ph[\s\S]*=[\s\S]*("|')([\s\S]*?)\1[\s\S]*\)/g;
function _extractPlaceholderName(input) {
return input.split(_CUSTOM_PH_EXP)[2];
}
});
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* @license\n * Copyright Google Inc. 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 */\n\nimport {Lexer as ExpressionLexer} from '../expression_parser/lexer';\nimport {Parser as ExpressionParser} from '../expression_parser/parser';\nimport * as html from '../ml_parser/ast';\nimport {getHtmlTagDefinition} from '../ml_parser/html_tags';\nimport {InterpolationConfig} from '../ml_parser/interpolation_config';\nimport {ParseSourceSpan} from '../parse_util';\n\nimport * as i18n from './i18n_ast';\nimport {PlaceholderRegistry} from './serializers/placeholder';\n\nconst _expParser = new ExpressionParser(new ExpressionLexer());\n\n/**\n * Returns a function converting html nodes to an i18n Message given an interpolationConfig\n */\nexport function createI18nMessageFactory(interpolationConfig: InterpolationConfig): (\n    nodes: html.Node[], meaning: string, description: string, id: string) => i18n.Message {\n  const visitor = new _I18nVisitor(_expParser, interpolationConfig);\n\n  return (nodes: html.Node[], meaning: string, description: string, id: string) =>\n             visitor.toI18nMessage(nodes, meaning, description, id);\n}\n\nclass _I18nVisitor implements html.Visitor {\n  // TODO(issue/24571): remove '!'.\n  private _isIcu !: boolean;\n  // TODO(issue/24571): remove '!'.\n  private _icuDepth !: number;\n  // TODO(issue/24571): remove '!'.\n  private _placeholderRegistry !: PlaceholderRegistry;\n  // TODO(issue/24571): remove '!'.\n  private _placeholderToContent !: {[phName: string]: string};\n  // TODO(issue/24571): remove '!'.\n  private _placeholderToMessage !: {[phName: string]: i18n.Message};\n\n  constructor(\n      private _expressionParser: ExpressionParser,\n      private _interpolationConfig: InterpolationConfig) {}\n\n  public toI18nMessage(nodes: html.Node[], meaning: string, description: string, id: string):\n      i18n.Message {\n    this._isIcu = nodes.length == 1 && nodes[0] instanceof html.Expansion;\n    this._icuDepth = 0;\n    this._placeholderRegistry = new PlaceholderRegistry();\n    this._placeholderToContent = {};\n    this._placeholderToMessage = {};\n\n    const i18nodes: i18n.Node[] = html.visitAll(this, nodes, {});\n\n    return new i18n.Message(\n        i18nodes, this._placeholderToContent, this._placeholderToMessage, meaning, description, id);\n  }\n\n  visitElement(el: html.Element, context: any): i18n.Node {\n    const children = html.visitAll(this, el.children);\n    const attrs: {[k: string]: string} = {};\n    el.attrs.forEach(attr => {\n      // Do not visit the attributes, translatable ones are top-level ASTs\n      attrs[attr.name] = attr.value;\n    });\n\n    const isVoid: boolean = getHtmlTagDefinition(el.name).isVoid;\n    const startPhName =\n        this._placeholderRegistry.getStartTagPlaceholderName(el.name, attrs, isVoid);\n    this._placeholderToContent[startPhName] = el.sourceSpan !.toString();\n\n    let closePhName = '';\n\n    if (!isVoid) {\n      closePhName = this._placeholderRegistry.getCloseTagPlaceholderName(el.name);\n      this._placeholderToContent[closePhName] = `</${el.name}>`;\n    }\n\n    return new i18n.TagPlaceholder(\n        el.name, attrs, startPhName, closePhName, children, isVoid, el.sourceSpan !);\n  }\n\n  visitAttribute(attribute: html.Attribute, context: any): i18n.Node {\n    return this._visitTextWithInterpolation(attribute.value, attribute.sourceSpan);\n  }\n\n  visitText(text: html.Text, context: any): i18n.Node {\n    return this._visitTextWithInterpolation(text.value, text.sourceSpan !);\n  }\n\n  visitComment(comment: html.Comment, context: any): i18n.Node|null { return null; }\n\n  visitExpansion(icu: html.Expansion, context: any): i18n.Node {\n    this._icuDepth++;\n    const i18nIcuCases: {[k: string]: i18n.Node} = {};\n    const i18nIcu = new i18n.Icu(icu.switchValue, icu.type, i18nIcuCases, icu.sourceSpan);\n    icu.cases.forEach((caze): void => {\n      i18nIcuCases[caze.value] = new i18n.Container(\n          caze.expression.map((node) => node.visit(this, {})), caze.expSourceSpan);\n    });\n    this._icuDepth--;\n\n    if (this._isIcu || this._icuDepth > 0) {\n      // Returns an ICU node when:\n      // - the message (vs a part of the message) is an ICU message, or\n      // - the ICU message is nested.\n      const expPh = this._placeholderRegistry.getUniquePlaceholder(`VAR_${icu.type}`);\n      i18nIcu.expressionPlaceholder = expPh;\n      this._placeholderToContent[expPh] = icu.switchValue;\n\n      return i18nIcu;\n    }\n\n    // Else returns a placeholder\n    // ICU placeholders should not be replaced with their original content but with the their\n    // translations. We need to create a new visitor (they are not re-entrant) to compute the\n    // message id.\n    // TODO(vicb): add a html.Node -> i18n.Message cache to avoid having to re-create the msg\n    const phName = this._placeholderRegistry.getPlaceholderName('ICU', icu.sourceSpan.toString());\n    const visitor = new _I18nVisitor(this._expressionParser, this._interpolationConfig);\n    this._placeholderToMessage[phName] = visitor.toI18nMessage([icu], '', '', '');\n    return new i18n.IcuPlaceholder(i18nIcu, phName, icu.sourceSpan);\n  }\n\n  visitExpansionCase(icuCase: html.ExpansionCase, context: any): i18n.Node {\n    throw new Error('Unreachable code');\n  }\n\n  private _visitTextWithInterpolation(text: string, sourceSpan: ParseSourceSpan): i18n.Node {\n    const splitInterpolation = this._expressionParser.splitInterpolation(\n        text, sourceSpan.start.toString(), this._interpolationConfig);\n\n    if (!splitInterpolation) {\n      // No expression, return a single text\n      return new i18n.Text(text, sourceSpan);\n    }\n\n    // Return a group of text + expressions\n    const nodes: i18n.Node[] = [];\n    const container = new i18n.Container(nodes, sourceSpan);\n    const {start: sDelimiter, end: eDelimiter} = this._interpolationConfig;\n\n    for (let i = 0; i < splitInterpolation.strings.length - 1; i++) {\n      const expression = splitInterpolation.expressions[i];\n      const baseName = _extractPlaceholderName(expression) || 'INTERPOLATION';\n      const phName = this._placeholderRegistry.getPlaceholderName(baseName, expression);\n\n      if (splitInterpolation.strings[i].length) {\n        // No need to add empty strings\n        nodes.push(new i18n.Text(splitInterpolation.strings[i], sourceSpan));\n      }\n\n      nodes.push(new i18n.Placeholder(expression, phName, sourceSpan));\n      this._placeholderToContent[phName] = sDelimiter + expression + eDelimiter;\n    }\n\n    // The last index contains no expression\n    const lastStringIdx = splitInterpolation.strings.length - 1;\n    if (splitInterpolation.strings[lastStringIdx].length) {\n      nodes.push(new i18n.Text(splitInterpolation.strings[lastStringIdx], sourceSpan));\n    }\n    return container;\n  }\n}\n\nconst _CUSTOM_PH_EXP =\n    /\\/\\/[\\s\\S]*i18n[\\s\\S]*\\([\\s\\S]*ph[\\s\\S]*=[\\s\\S]*(\"|')([\\s\\S]*?)\\1[\\s\\S]*\\)/g;\n\nfunction _extractPlaceholderName(input: string): string {\n  return input.split(_CUSTOM_PH_EXP)[2];\n}\n"]}