@angular/compiler
Version:
Angular - the compiler library
175 lines • 30.3 kB
JavaScript
/**
* @license
* Copyright Google LLC 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/parse_util", "@angular/compiler/src/i18n/i18n_ast", "@angular/compiler/src/i18n/serializers/placeholder"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.createI18nMessageFactory = void 0;
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 parse_util_1 = require("@angular/compiler/src/parse_util");
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, customId, visitNodeFn) {
return visitor.toI18nMessage(nodes, meaning, description, customId, visitNodeFn);
};
}
exports.createI18nMessageFactory = createI18nMessageFactory;
function noopVisitNodeFn(_html, i18n) {
return i18n;
}
var _I18nVisitor = /** @class */ (function () {
function _I18nVisitor(_expressionParser, _interpolationConfig) {
this._expressionParser = _expressionParser;
this._interpolationConfig = _interpolationConfig;
}
_I18nVisitor.prototype.toI18nMessage = function (nodes, meaning, description, customId, visitNodeFn) {
if (meaning === void 0) { meaning = ''; }
if (description === void 0) { description = ''; }
if (customId === void 0) { customId = ''; }
var context = {
isIcu: nodes.length == 1 && nodes[0] instanceof html.Expansion,
icuDepth: 0,
placeholderRegistry: new placeholder_1.PlaceholderRegistry(),
placeholderToContent: {},
placeholderToMessage: {},
visitNodeFn: visitNodeFn || noopVisitNodeFn,
};
var i18nodes = html.visitAll(this, nodes, context);
return new i18n.Message(i18nodes, context.placeholderToContent, context.placeholderToMessage, meaning, description, customId);
};
_I18nVisitor.prototype.visitElement = function (el, context) {
var _a;
var children = html.visitAll(this, el.children, context);
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 = context.placeholderRegistry.getStartTagPlaceholderName(el.name, attrs, isVoid);
context.placeholderToContent[startPhName] = {
text: el.startSourceSpan.toString(),
sourceSpan: el.startSourceSpan,
};
var closePhName = '';
if (!isVoid) {
closePhName = context.placeholderRegistry.getCloseTagPlaceholderName(el.name);
context.placeholderToContent[closePhName] = {
text: "</" + el.name + ">",
sourceSpan: (_a = el.endSourceSpan) !== null && _a !== void 0 ? _a : el.sourceSpan,
};
}
var node = new i18n.TagPlaceholder(el.name, attrs, startPhName, closePhName, children, isVoid, el.sourceSpan, el.startSourceSpan, el.endSourceSpan);
return context.visitNodeFn(el, node);
};
_I18nVisitor.prototype.visitAttribute = function (attribute, context) {
var node = this._visitTextWithInterpolation(attribute.value, attribute.sourceSpan, context);
return context.visitNodeFn(attribute, node);
};
_I18nVisitor.prototype.visitText = function (text, context) {
var node = this._visitTextWithInterpolation(text.value, text.sourceSpan, context);
return context.visitNodeFn(text, node);
};
_I18nVisitor.prototype.visitComment = function (comment, context) {
return null;
};
_I18nVisitor.prototype.visitExpansion = function (icu, context) {
var _this = this;
context.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, context); }), caze.expSourceSpan);
});
context.icuDepth--;
if (context.isIcu || context.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 = context.placeholderRegistry.getUniquePlaceholder("VAR_" + icu.type);
i18nIcu.expressionPlaceholder = expPh;
context.placeholderToContent[expPh] = {
text: icu.switchValue,
sourceSpan: icu.switchValueSourceSpan,
};
return context.visitNodeFn(icu, i18nIcu);
}
// Else returns a placeholder
// ICU placeholders should not be replaced with their original content but with the their
// translations.
// TODO(vicb): add a html.Node -> i18n.Message cache to avoid having to re-create the msg
var phName = context.placeholderRegistry.getPlaceholderName('ICU', icu.sourceSpan.toString());
context.placeholderToMessage[phName] = this.toI18nMessage([icu], '', '', '', undefined);
var node = new i18n.IcuPlaceholder(i18nIcu, phName, icu.sourceSpan);
return context.visitNodeFn(icu, node);
};
_I18nVisitor.prototype.visitExpansionCase = function (_icuCase, _context) {
throw new Error('Unreachable code');
};
_I18nVisitor.prototype._visitTextWithInterpolation = function (text, sourceSpan, context) {
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 = context.placeholderRegistry.getPlaceholderName(baseName, expression);
if (splitInterpolation.strings[i].length) {
// No need to add empty strings
var stringSpan = getOffsetSourceSpan(sourceSpan, splitInterpolation.stringSpans[i]);
nodes.push(new i18n.Text(splitInterpolation.strings[i], stringSpan));
}
var expressionSpan = getOffsetSourceSpan(sourceSpan, splitInterpolation.expressionsSpans[i]);
nodes.push(new i18n.Placeholder(expression, phName, expressionSpan));
context.placeholderToContent[phName] = {
text: sDelimiter + expression + eDelimiter,
sourceSpan: expressionSpan,
};
}
// The last index contains no expression
var lastStringIdx = splitInterpolation.strings.length - 1;
if (splitInterpolation.strings[lastStringIdx].length) {
var stringSpan = getOffsetSourceSpan(sourceSpan, splitInterpolation.stringSpans[lastStringIdx]);
nodes.push(new i18n.Text(splitInterpolation.strings[lastStringIdx], stringSpan));
}
return container;
};
return _I18nVisitor;
}());
function getOffsetSourceSpan(sourceSpan, _a) {
var start = _a.start, end = _a.end;
return new parse_util_1.ParseSourceSpan(sourceSpan.fullStart.moveBy(start), sourceSpan.fullStart.moveBy(end));
}
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 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 */\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\nexport type VisitNodeFn = (html: html.Node, i18n: i18n.Node) => i18n.Node;\n\nexport interface I18nMessageFactory {\n  (nodes: html.Node[], meaning: string|undefined, description: string|undefined,\n   customId: string|undefined, visitNodeFn?: VisitNodeFn): i18n.Message;\n}\n\n/**\n * Returns a function converting html nodes to an i18n Message given an interpolationConfig\n */\nexport function createI18nMessageFactory(interpolationConfig: InterpolationConfig):\n    I18nMessageFactory {\n  const visitor = new _I18nVisitor(_expParser, interpolationConfig);\n  return (nodes, meaning, description, customId, visitNodeFn) =>\n             visitor.toI18nMessage(nodes, meaning, description, customId, visitNodeFn);\n}\n\ninterface I18nMessageVisitorContext {\n  isIcu: boolean;\n  icuDepth: number;\n  placeholderRegistry: PlaceholderRegistry;\n  placeholderToContent: {[phName: string]: i18n.MessagePlaceholder};\n  placeholderToMessage: {[phName: string]: i18n.Message};\n  visitNodeFn: VisitNodeFn;\n}\n\nfunction noopVisitNodeFn(_html: html.Node, i18n: i18n.Node): i18n.Node {\n  return i18n;\n}\n\nclass _I18nVisitor implements html.Visitor {\n  constructor(\n      private _expressionParser: ExpressionParser,\n      private _interpolationConfig: InterpolationConfig) {}\n\n  public toI18nMessage(\n      nodes: html.Node[], meaning = '', description = '', customId = '',\n      visitNodeFn: VisitNodeFn|undefined): i18n.Message {\n    const context: I18nMessageVisitorContext = {\n      isIcu: nodes.length == 1 && nodes[0] instanceof html.Expansion,\n      icuDepth: 0,\n      placeholderRegistry: new PlaceholderRegistry(),\n      placeholderToContent: {},\n      placeholderToMessage: {},\n      visitNodeFn: visitNodeFn || noopVisitNodeFn,\n    };\n\n    const i18nodes: i18n.Node[] = html.visitAll(this, nodes, context);\n\n    return new i18n.Message(\n        i18nodes, context.placeholderToContent, context.placeholderToMessage, meaning, description,\n        customId);\n  }\n\n  visitElement(el: html.Element, context: I18nMessageVisitorContext): i18n.Node {\n    const children = html.visitAll(this, el.children, context);\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        context.placeholderRegistry.getStartTagPlaceholderName(el.name, attrs, isVoid);\n    context.placeholderToContent[startPhName] = {\n      text: el.startSourceSpan.toString(),\n      sourceSpan: el.startSourceSpan,\n    };\n\n    let closePhName = '';\n\n    if (!isVoid) {\n      closePhName = context.placeholderRegistry.getCloseTagPlaceholderName(el.name);\n      context.placeholderToContent[closePhName] = {\n        text: `</${el.name}>`,\n        sourceSpan: el.endSourceSpan ?? el.sourceSpan,\n      };\n    }\n\n    const node = new i18n.TagPlaceholder(\n        el.name, attrs, startPhName, closePhName, children, isVoid, el.sourceSpan,\n        el.startSourceSpan, el.endSourceSpan);\n    return context.visitNodeFn(el, node);\n  }\n\n  visitAttribute(attribute: html.Attribute, context: I18nMessageVisitorContext): i18n.Node {\n    const node = this._visitTextWithInterpolation(attribute.value, attribute.sourceSpan, context);\n    return context.visitNodeFn(attribute, node);\n  }\n\n  visitText(text: html.Text, context: I18nMessageVisitorContext): i18n.Node {\n    const node = this._visitTextWithInterpolation(text.value, text.sourceSpan, context);\n    return context.visitNodeFn(text, node);\n  }\n\n  visitComment(comment: html.Comment, context: I18nMessageVisitorContext): i18n.Node|null {\n    return null;\n  }\n\n  visitExpansion(icu: html.Expansion, context: I18nMessageVisitorContext): i18n.Node {\n    context.icuDepth++;\n    const i18nIcuCases: {[k: string]: i18n.Node} = {};\n    const i18nIcu = new i18n.Icu(icu.switchValue, icu.type, i18nIcuCases, icu.sourceSpan);\n    icu.cases.forEach((caze): void => {\n      i18nIcuCases[caze.value] = new i18n.Container(\n          caze.expression.map((node) => node.visit(this, context)), caze.expSourceSpan);\n    });\n    context.icuDepth--;\n\n    if (context.isIcu || context.icuDepth > 0) {\n      // Returns an ICU node when:\n      // - the message (vs a part of the message) is an ICU message, or\n      // - the ICU message is nested.\n      const expPh = context.placeholderRegistry.getUniquePlaceholder(`VAR_${icu.type}`);\n      i18nIcu.expressionPlaceholder = expPh;\n      context.placeholderToContent[expPh] = {\n        text: icu.switchValue,\n        sourceSpan: icu.switchValueSourceSpan,\n      };\n      return context.visitNodeFn(icu, 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.\n    // TODO(vicb): add a html.Node -> i18n.Message cache to avoid having to re-create the msg\n    const phName = context.placeholderRegistry.getPlaceholderName('ICU', icu.sourceSpan.toString());\n    context.placeholderToMessage[phName] = this.toI18nMessage([icu], '', '', '', undefined);\n    const node = new i18n.IcuPlaceholder(i18nIcu, phName, icu.sourceSpan);\n    return context.visitNodeFn(icu, node);\n  }\n\n  visitExpansionCase(_icuCase: html.ExpansionCase, _context: I18nMessageVisitorContext): i18n.Node {\n    throw new Error('Unreachable code');\n  }\n\n  private _visitTextWithInterpolation(\n      text: string, sourceSpan: ParseSourceSpan, context: I18nMessageVisitorContext): 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 = context.placeholderRegistry.getPlaceholderName(baseName, expression);\n\n      if (splitInterpolation.strings[i].length) {\n        // No need to add empty strings\n        const stringSpan = getOffsetSourceSpan(sourceSpan, splitInterpolation.stringSpans[i]);\n        nodes.push(new i18n.Text(splitInterpolation.strings[i], stringSpan));\n      }\n\n      const expressionSpan =\n          getOffsetSourceSpan(sourceSpan, splitInterpolation.expressionsSpans[i]);\n      nodes.push(new i18n.Placeholder(expression, phName, expressionSpan));\n      context.placeholderToContent[phName] = {\n        text: sDelimiter + expression + eDelimiter,\n        sourceSpan: expressionSpan,\n      };\n    }\n\n    // The last index contains no expression\n    const lastStringIdx = splitInterpolation.strings.length - 1;\n    if (splitInterpolation.strings[lastStringIdx].length) {\n      const stringSpan =\n          getOffsetSourceSpan(sourceSpan, splitInterpolation.stringSpans[lastStringIdx]);\n      nodes.push(new i18n.Text(splitInterpolation.strings[lastStringIdx], stringSpan));\n    }\n    return container;\n  }\n}\n\nfunction getOffsetSourceSpan(\n    sourceSpan: ParseSourceSpan, {start, end}: {start: number, end: number}): ParseSourceSpan {\n  return new ParseSourceSpan(sourceSpan.fullStart.moveBy(start), sourceSpan.fullStart.moveBy(end));\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"]}