source: trip-planner-front/node_modules/@angular/compiler/esm2015/src/render3/view/i18n/context.js

/**
 * @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
 */
import { assembleBoundTextPlaceholders, getSeqNumberGenerator, updatePlaceholderMap, wrapI18nPlaceholder } from './util';
var TagType;
(function (TagType) {
    TagType[TagType["ELEMENT"] = 0] = "ELEMENT";
    TagType[TagType["TEMPLATE"] = 1] = "TEMPLATE";
})(TagType || (TagType = {}));
/**
 * Generates an object that is used as a shared state between parent and all child contexts.
 */
function setupRegistry() {
    return { getUniqueId: getSeqNumberGenerator(), icus: new Map() };
}
/**
 * I18nContext is a helper class which keeps track of all i18n-related aspects
 * (accumulates placeholders, bindings, etc) between i18nStart and i18nEnd instructions.
 *
 * When we enter a nested template, the top-level context is being passed down
 * to the nested component, which uses this context to generate a child instance
 * of I18nContext class (to handle nested template) and at the end, reconciles it back
 * with the parent context.
 *
 * @param index Instruction index of i18nStart, which initiates this context
 * @param ref Reference to a translation const that represents the content if thus context
 * @param level Nestng level defined for child contexts
 * @param templateIndex Instruction index of a template which this context belongs to
 * @param meta Meta information (id, meaning, description, etc) associated with this context
 */
export class I18nContext {
    constructor(index, ref, level = 0, templateIndex = null, meta, registry) {
        this.index = index;
        this.ref = ref;
        this.level = level;
        this.templateIndex = templateIndex;
        this.meta = meta;
        this.registry = registry;
        this.bindings = new Set();
        this.placeholders = new Map();
        this.isEmitted = false;
        this._unresolvedCtxCount = 0;
        this._registry = registry || setupRegistry();
        this.id = this._registry.getUniqueId();
    }
    appendTag(type, node, index, closed) {
        if (node.isVoid && closed) {
            return; // ignore "close" for void tags
        }
        const ph = node.isVoid || !closed ? node.startName : node.closeName;
        const content = { type, index, ctx: this.id, isVoid: node.isVoid, closed };
        updatePlaceholderMap(this.placeholders, ph, content);
    }
    get icus() {
        return this._registry.icus;
    }
    get isRoot() {
        return this.level === 0;
    }
    get isResolved() {
        return this._unresolvedCtxCount === 0;
    }
    getSerializedPlaceholders() {
        const result = new Map();
        this.placeholders.forEach((values, key) => result.set(key, values.map(serializePlaceholderValue)));
        return result;
    }
    // public API to accumulate i18n-related content
    appendBinding(binding) {
        this.bindings.add(binding);
    }
    appendIcu(name, ref) {
        updatePlaceholderMap(this._registry.icus, name, ref);
    }
    appendBoundText(node) {
        const phs = assembleBoundTextPlaceholders(node, this.bindings.size, this.id);
        phs.forEach((values, key) => updatePlaceholderMap(this.placeholders, key, ...values));
    }
    appendTemplate(node, index) {
        // add open and close tags at the same time,
        // since we process nested templates separately
        this.appendTag(TagType.TEMPLATE, node, index, false);
        this.appendTag(TagType.TEMPLATE, node, index, true);
        this._unresolvedCtxCount++;
    }
    appendElement(node, index, closed) {
        this.appendTag(TagType.ELEMENT, node, index, closed);
    }
    appendProjection(node, index) {
        // Add open and close tags at the same time, since `<ng-content>` has no content,
        // so when we come across `<ng-content>` we can register both open and close tags.
        // Note: runtime i18n logic doesn't distinguish `<ng-content>` tag placeholders and
        // regular element tag placeholders, so we generate element placeholders for both types.
        this.appendTag(TagType.ELEMENT, node, index, false);
        this.appendTag(TagType.ELEMENT, node, index, true);
    }
    /**
     * Generates an instance of a child context based on the root one,
     * when we enter a nested template within I18n section.
     *
     * @param index Instruction index of corresponding i18nStart, which initiates this context
     * @param templateIndex Instruction index of a template which this context belongs to
     * @param meta Meta information (id, meaning, description, etc) associated with this context
     *
     * @returns I18nContext instance
     */
    forkChildContext(index, templateIndex, meta) {
        return new I18nContext(index, this.ref, this.level + 1, templateIndex, meta, this._registry);
    }
    /**
     * Reconciles child context into parent one once the end of the i18n block is reached (i18nEnd).
     *
     * @param context Child I18nContext instance to be reconciled with parent context.
     */
    reconcileChildContext(context) {
        // set the right context id for open and close
        // template tags, so we can use it as sub-block ids
        ['start', 'close'].forEach((op) => {
            const key = context.meta[`${op}Name`];
            const phs = this.placeholders.get(key) || [];
            const tag = phs.find(findTemplateFn(this.id, context.templateIndex));
            if (tag) {
                tag.ctx = context.id;
            }
        });
        // reconcile placeholders
        const childPhs = context.placeholders;
        childPhs.forEach((values, key) => {
            const phs = this.placeholders.get(key);
            if (!phs) {
                this.placeholders.set(key, values);
                return;
            }
            // try to find matching template...
            const tmplIdx = phs.findIndex(findTemplateFn(context.id, context.templateIndex));
            if (tmplIdx >= 0) {
                // ... if found - replace it with nested template content
                const isCloseTag = key.startsWith('CLOSE');
                const isTemplateTag = key.endsWith('NG-TEMPLATE');
                if (isTemplateTag) {
                    // current template's content is placed before or after
                    // parent template tag, depending on the open/close atrribute
                    phs.splice(tmplIdx + (isCloseTag ? 0 : 1), 0, ...values);
                }
                else {
                    const idx = isCloseTag ? values.length - 1 : 0;
                    values[idx].tmpl = phs[tmplIdx];
                    phs.splice(tmplIdx, 1, ...values);
                }
            }
            else {
                // ... otherwise just append content to placeholder value
                phs.push(...values);
            }
            this.placeholders.set(key, phs);
        });
        this._unresolvedCtxCount--;
    }
}
//
// Helper methods
//
function wrap(symbol, index, contextId, closed) {
    const state = closed ? '/' : '';
    return wrapI18nPlaceholder(`${state}${symbol}${index}`, contextId);
}
function wrapTag(symbol, { index, ctx, isVoid }, closed) {
    return isVoid ? wrap(symbol, index, ctx) + wrap(symbol, index, ctx, true) :
        wrap(symbol, index, ctx, closed);
}
function findTemplateFn(ctx, templateIndex) {
    return (token) => typeof token === 'object' && token.type === TagType.TEMPLATE &&
        token.index === templateIndex && token.ctx === ctx;
}
function serializePlaceholderValue(value) {
    const element = (data, closed) => wrapTag('#', data, closed);
    const template = (data, closed) => wrapTag('*', data, closed);
    const projection = (data, closed) => wrapTag('!', data, closed);
    switch (value.type) {
        case TagType.ELEMENT:
            // close element tag
            if (value.closed) {
                return element(value, true) + (value.tmpl ? template(value.tmpl, true) : '');
            }
            // open element tag that also initiates a template
            if (value.tmpl) {
                return template(value.tmpl) + element(value) +
                    (value.isVoid ? template(value.tmpl, true) : '');
            }
            return element(value);
        case TagType.TEMPLATE:
            return template(value, value.closed);
        default:
            return value;
    }
}
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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 {AST} from '../../../expression_parser/ast';\nimport * as i18n from '../../../i18n/i18n_ast';\nimport * as o from '../../../output/output_ast';\n\nimport {assembleBoundTextPlaceholders, getSeqNumberGenerator, updatePlaceholderMap, wrapI18nPlaceholder} from './util';\n\nenum TagType {\n  ELEMENT,\n  TEMPLATE,\n}\n\n/**\n * Generates an object that is used as a shared state between parent and all child contexts.\n */\nfunction setupRegistry() {\n  return {getUniqueId: getSeqNumberGenerator(), icus: new Map<string, any[]>()};\n}\n\n/**\n * I18nContext is a helper class which keeps track of all i18n-related aspects\n * (accumulates placeholders, bindings, etc) between i18nStart and i18nEnd instructions.\n *\n * When we enter a nested template, the top-level context is being passed down\n * to the nested component, which uses this context to generate a child instance\n * of I18nContext class (to handle nested template) and at the end, reconciles it back\n * with the parent context.\n *\n * @param index Instruction index of i18nStart, which initiates this context\n * @param ref Reference to a translation const that represents the content if thus context\n * @param level Nestng level defined for child contexts\n * @param templateIndex Instruction index of a template which this context belongs to\n * @param meta Meta information (id, meaning, description, etc) associated with this context\n */\nexport class I18nContext {\n  public readonly id: number;\n  public bindings = new Set<AST>();\n  public placeholders = new Map<string, any[]>();\n  public isEmitted: boolean = false;\n\n  private _registry!: any;\n  private _unresolvedCtxCount: number = 0;\n\n  constructor(\n      readonly index: number, readonly ref: o.ReadVarExpr, readonly level: number = 0,\n      readonly templateIndex: number|null = null, readonly meta: i18n.I18nMeta,\n      private registry?: any) {\n    this._registry = registry || setupRegistry();\n    this.id = this._registry.getUniqueId();\n  }\n\n  private appendTag(type: TagType, node: i18n.TagPlaceholder, index: number, closed?: boolean) {\n    if (node.isVoid && closed) {\n      return;  // ignore \"close\" for void tags\n    }\n    const ph = node.isVoid || !closed ? node.startName : node.closeName;\n    const content = {type, index, ctx: this.id, isVoid: node.isVoid, closed};\n    updatePlaceholderMap(this.placeholders, ph, content);\n  }\n\n  get icus() {\n    return this._registry.icus;\n  }\n  get isRoot() {\n    return this.level === 0;\n  }\n  get isResolved() {\n    return this._unresolvedCtxCount === 0;\n  }\n\n  getSerializedPlaceholders() {\n    const result = new Map<string, any[]>();\n    this.placeholders.forEach(\n        (values, key) => result.set(key, values.map(serializePlaceholderValue)));\n    return result;\n  }\n\n  // public API to accumulate i18n-related content\n  appendBinding(binding: AST) {\n    this.bindings.add(binding);\n  }\n  appendIcu(name: string, ref: o.Expression) {\n    updatePlaceholderMap(this._registry.icus, name, ref);\n  }\n  appendBoundText(node: i18n.I18nMeta) {\n    const phs = assembleBoundTextPlaceholders(node, this.bindings.size, this.id);\n    phs.forEach((values, key) => updatePlaceholderMap(this.placeholders, key, ...values));\n  }\n  appendTemplate(node: i18n.I18nMeta, index: number) {\n    // add open and close tags at the same time,\n    // since we process nested templates separately\n    this.appendTag(TagType.TEMPLATE, node as i18n.TagPlaceholder, index, false);\n    this.appendTag(TagType.TEMPLATE, node as i18n.TagPlaceholder, index, true);\n    this._unresolvedCtxCount++;\n  }\n  appendElement(node: i18n.I18nMeta, index: number, closed?: boolean) {\n    this.appendTag(TagType.ELEMENT, node as i18n.TagPlaceholder, index, closed);\n  }\n  appendProjection(node: i18n.I18nMeta, index: number) {\n    // Add open and close tags at the same time, since `<ng-content>` has no content,\n    // so when we come across `<ng-content>` we can register both open and close tags.\n    // Note: runtime i18n logic doesn't distinguish `<ng-content>` tag placeholders and\n    // regular element tag placeholders, so we generate element placeholders for both types.\n    this.appendTag(TagType.ELEMENT, node as i18n.TagPlaceholder, index, false);\n    this.appendTag(TagType.ELEMENT, node as i18n.TagPlaceholder, index, true);\n  }\n\n  /**\n   * Generates an instance of a child context based on the root one,\n   * when we enter a nested template within I18n section.\n   *\n   * @param index Instruction index of corresponding i18nStart, which initiates this context\n   * @param templateIndex Instruction index of a template which this context belongs to\n   * @param meta Meta information (id, meaning, description, etc) associated with this context\n   *\n   * @returns I18nContext instance\n   */\n  forkChildContext(index: number, templateIndex: number, meta: i18n.I18nMeta) {\n    return new I18nContext(index, this.ref, this.level + 1, templateIndex, meta, this._registry);\n  }\n\n  /**\n   * Reconciles child context into parent one once the end of the i18n block is reached (i18nEnd).\n   *\n   * @param context Child I18nContext instance to be reconciled with parent context.\n   */\n  reconcileChildContext(context: I18nContext) {\n    // set the right context id for open and close\n    // template tags, so we can use it as sub-block ids\n    ['start', 'close'].forEach((op: string) => {\n      const key = (context.meta as any)[`${op}Name`];\n      const phs = this.placeholders.get(key) || [];\n      const tag = phs.find(findTemplateFn(this.id, context.templateIndex));\n      if (tag) {\n        tag.ctx = context.id;\n      }\n    });\n\n    // reconcile placeholders\n    const childPhs = context.placeholders;\n    childPhs.forEach((values: any[], key: string) => {\n      const phs = this.placeholders.get(key);\n      if (!phs) {\n        this.placeholders.set(key, values);\n        return;\n      }\n      // try to find matching template...\n      const tmplIdx = phs.findIndex(findTemplateFn(context.id, context.templateIndex));\n      if (tmplIdx >= 0) {\n        // ... if found - replace it with nested template content\n        const isCloseTag = key.startsWith('CLOSE');\n        const isTemplateTag = key.endsWith('NG-TEMPLATE');\n        if (isTemplateTag) {\n          // current template's content is placed before or after\n          // parent template tag, depending on the open/close atrribute\n          phs.splice(tmplIdx + (isCloseTag ? 0 : 1), 0, ...values);\n        } else {\n          const idx = isCloseTag ? values.length - 1 : 0;\n          values[idx].tmpl = phs[tmplIdx];\n          phs.splice(tmplIdx, 1, ...values);\n        }\n      } else {\n        // ... otherwise just append content to placeholder value\n        phs.push(...values);\n      }\n      this.placeholders.set(key, phs);\n    });\n    this._unresolvedCtxCount--;\n  }\n}\n\n//\n// Helper methods\n//\n\nfunction wrap(symbol: string, index: number, contextId: number, closed?: boolean): string {\n  const state = closed ? '/' : '';\n  return wrapI18nPlaceholder(`${state}${symbol}${index}`, contextId);\n}\n\nfunction wrapTag(symbol: string, {index, ctx, isVoid}: any, closed?: boolean): string {\n  return isVoid ? wrap(symbol, index, ctx) + wrap(symbol, index, ctx, true) :\n                  wrap(symbol, index, ctx, closed);\n}\n\nfunction findTemplateFn(ctx: number, templateIndex: number|null) {\n  return (token: any) => typeof token === 'object' && token.type === TagType.TEMPLATE &&\n      token.index === templateIndex && token.ctx === ctx;\n}\n\nfunction serializePlaceholderValue(value: any): string {\n  const element = (data: any, closed?: boolean) => wrapTag('#', data, closed);\n  const template = (data: any, closed?: boolean) => wrapTag('*', data, closed);\n  const projection = (data: any, closed?: boolean) => wrapTag('!', data, closed);\n\n  switch (value.type) {\n    case TagType.ELEMENT:\n      // close element tag\n      if (value.closed) {\n        return element(value, true) + (value.tmpl ? template(value.tmpl, true) : '');\n      }\n      // open element tag that also initiates a template\n      if (value.tmpl) {\n        return template(value.tmpl) + element(value) +\n            (value.isVoid ? template(value.tmpl, true) : '');\n      }\n      return element(value);\n\n    case TagType.TEMPLATE:\n      return template(value, value.closed);\n\n    default:\n      return value;\n  }\n}\n"]}