dd0815095f
- `ɵɵtextBinding(..., ɵɵinterpolationX())` instructions will now just be `ɵɵtextInterpolate(...)` instructions PR Close #30011
1924 lines
77 KiB
TypeScript
1924 lines
77 KiB
TypeScript
/**
|
||
* @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
|
||
*/
|
||
|
||
import {flatten, sanitizeIdentifier} from '../../compile_metadata';
|
||
import {BindingForm, BuiltinFunctionCall, LocalResolver, convertActionBinding, convertPropertyBinding, convertUpdateArguments} from '../../compiler_util/expression_converter';
|
||
import {ConstantPool} from '../../constant_pool';
|
||
import * as core from '../../core';
|
||
import {AST, AstMemoryEfficientTransformer, BindingPipe, BindingType, FunctionCall, ImplicitReceiver, Interpolation, LiteralArray, LiteralMap, LiteralPrimitive, ParsedEventType, PropertyRead} from '../../expression_parser/ast';
|
||
import {Lexer} from '../../expression_parser/lexer';
|
||
import {Parser} from '../../expression_parser/parser';
|
||
import * as i18n from '../../i18n/i18n_ast';
|
||
import * as html from '../../ml_parser/ast';
|
||
import {HtmlParser} from '../../ml_parser/html_parser';
|
||
import {WhitespaceVisitor} from '../../ml_parser/html_whitespaces';
|
||
import {DEFAULT_INTERPOLATION_CONFIG, InterpolationConfig} from '../../ml_parser/interpolation_config';
|
||
import {LexerRange} from '../../ml_parser/lexer';
|
||
import {isNgContainer as checkIsNgContainer, splitNsName} from '../../ml_parser/tags';
|
||
import {mapLiteral} from '../../output/map_util';
|
||
import * as o from '../../output/output_ast';
|
||
import {ParseError, ParseSourceSpan} from '../../parse_util';
|
||
import {DomElementSchemaRegistry} from '../../schema/dom_element_schema_registry';
|
||
import {CssSelector, SelectorMatcher} from '../../selector';
|
||
import {BindingParser} from '../../template_parser/binding_parser';
|
||
import {error} from '../../util';
|
||
import * as t from '../r3_ast';
|
||
import {Identifiers as R3} from '../r3_identifiers';
|
||
import {htmlAstToRender3Ast} from '../r3_template_transform';
|
||
import {prepareSyntheticListenerFunctionName, prepareSyntheticListenerName, prepareSyntheticPropertyName} from '../util';
|
||
|
||
import {I18nContext} from './i18n/context';
|
||
import {I18nMetaVisitor} from './i18n/meta';
|
||
import {getSerializedI18nContent} from './i18n/serializer';
|
||
import {I18N_ICU_MAPPING_PREFIX, TRANSLATION_PREFIX, assembleBoundTextPlaceholders, assembleI18nBoundString, formatI18nPlaceholderName, getTranslationConstPrefix, getTranslationDeclStmts, icuFromI18nMessage, isI18nRootNode, isSingleI18nIcu, metaFromI18nMessage, placeholdersToParams, wrapI18nPlaceholder} from './i18n/util';
|
||
import {Instruction, StylingBuilder} from './styling_builder';
|
||
import {CONTEXT_NAME, IMPLICIT_REFERENCE, NON_BINDABLE_ATTR, REFERENCE_PREFIX, RENDER_FLAGS, asLiteral, getAttrsForDirectiveMatching, invalid, trimTrailingNulls, unsupported} from './util';
|
||
|
||
|
||
// Default selector used by `<ng-content>` if none specified
|
||
const DEFAULT_NG_CONTENT_SELECTOR = '*';
|
||
|
||
// Selector attribute name of `<ng-content>`
|
||
const NG_CONTENT_SELECT_ATTR = 'select';
|
||
|
||
// Attribute name of `ngProjectAs`.
|
||
const NG_PROJECT_AS_ATTR_NAME = 'ngProjectAs';
|
||
|
||
// List of supported global targets for event listeners
|
||
const GLOBAL_TARGET_RESOLVERS = new Map<string, o.ExternalReference>(
|
||
[['window', R3.resolveWindow], ['document', R3.resolveDocument], ['body', R3.resolveBody]]);
|
||
|
||
const LEADING_TRIVIA_CHARS = [' ', '\n', '\r', '\t'];
|
||
|
||
// if (rf & flags) { .. }
|
||
export function renderFlagCheckIfStmt(
|
||
flags: core.RenderFlags, statements: o.Statement[]): o.IfStmt {
|
||
return o.ifStmt(o.variable(RENDER_FLAGS).bitwiseAnd(o.literal(flags), null, false), statements);
|
||
}
|
||
|
||
export function prepareEventListenerParameters(
|
||
eventAst: t.BoundEvent, bindingContext: o.Expression, handlerName: string | null = null,
|
||
scope: BindingScope | null = null): o.Expression[] {
|
||
const {type, name, target, phase, handler} = eventAst;
|
||
if (target && !GLOBAL_TARGET_RESOLVERS.has(target)) {
|
||
throw new Error(`Unexpected global target '${target}' defined for '${name}' event.
|
||
Supported list of global targets: ${Array.from(GLOBAL_TARGET_RESOLVERS.keys())}.`);
|
||
}
|
||
|
||
const bindingExpr = convertActionBinding(
|
||
scope, bindingContext, handler, 'b', () => error('Unexpected interpolation'),
|
||
eventAst.handlerSpan);
|
||
|
||
const statements = [];
|
||
if (scope) {
|
||
statements.push(...scope.restoreViewStatement());
|
||
statements.push(...scope.variableDeclarations());
|
||
}
|
||
statements.push(...bindingExpr.render3Stmts);
|
||
|
||
const eventName: string =
|
||
type === ParsedEventType.Animation ? prepareSyntheticListenerName(name, phase !) : name;
|
||
const fnName = handlerName && sanitizeIdentifier(handlerName);
|
||
const fnArgs = [new o.FnParam('$event', o.DYNAMIC_TYPE)];
|
||
const handlerFn = o.fn(fnArgs, statements, o.INFERRED_TYPE, null, fnName);
|
||
|
||
const params: o.Expression[] = [o.literal(eventName), handlerFn];
|
||
if (target) {
|
||
params.push(
|
||
o.literal(false), // `useCapture` flag, defaults to `false`
|
||
o.importExpr(GLOBAL_TARGET_RESOLVERS.get(target) !));
|
||
}
|
||
return params;
|
||
}
|
||
|
||
export class TemplateDefinitionBuilder implements t.Visitor<void>, LocalResolver {
|
||
private _dataIndex = 0;
|
||
private _bindingContext = 0;
|
||
private _prefixCode: o.Statement[] = [];
|
||
/**
|
||
* List of callbacks to generate creation mode instructions. We store them here as we process
|
||
* the template so bindings in listeners are resolved only once all nodes have been visited.
|
||
* This ensures all local refs and context variables are available for matching.
|
||
*/
|
||
private _creationCodeFns: (() => o.Statement)[] = [];
|
||
/**
|
||
* List of callbacks to generate update mode instructions. We store them here as we process
|
||
* the template so bindings are resolved only once all nodes have been visited. This ensures
|
||
* all local refs and context variables are available for matching.
|
||
*/
|
||
private _updateCodeFns: (() => o.Statement)[] = [];
|
||
/**
|
||
* Memorizes the last node index for which a select instruction has been generated.
|
||
* We're initializing this to -1 to ensure the `select(0)` instruction is generated before any
|
||
* relevant update instructions.
|
||
*/
|
||
private _lastNodeIndexWithFlush: number = -1;
|
||
/** Temporary variable declarations generated from visiting pipes, literals, etc. */
|
||
private _tempVariables: o.Statement[] = [];
|
||
/**
|
||
* List of callbacks to build nested templates. Nested templates must not be visited until
|
||
* after the parent template has finished visiting all of its nodes. This ensures that all
|
||
* local ref bindings in nested templates are able to find local ref values if the refs
|
||
* are defined after the template declaration.
|
||
*/
|
||
private _nestedTemplateFns: (() => void)[] = [];
|
||
/**
|
||
* This scope contains local variables declared in the update mode block of the template.
|
||
* (e.g. refs and context vars in bindings)
|
||
*/
|
||
private _bindingScope: BindingScope;
|
||
private _valueConverter: ValueConverter;
|
||
private _unsupported = unsupported;
|
||
|
||
// i18n context local to this template
|
||
private i18n: I18nContext|null = null;
|
||
|
||
// Number of slots to reserve for pureFunctions
|
||
private _pureFunctionSlots = 0;
|
||
|
||
// Number of binding slots
|
||
private _bindingSlots = 0;
|
||
|
||
private fileBasedI18nSuffix: string;
|
||
|
||
// Whether the template includes <ng-content> tags.
|
||
private _hasNgContent: boolean = false;
|
||
|
||
// Selectors found in the <ng-content> tags in the template.
|
||
private _ngContentSelectors: string[] = [];
|
||
|
||
// Number of non-default selectors found in all parent templates of this template. We need to
|
||
// track it to properly adjust projection bucket index in the `projection` instruction.
|
||
private _ngContentSelectorsOffset = 0;
|
||
|
||
constructor(
|
||
private constantPool: ConstantPool, parentBindingScope: BindingScope, private level = 0,
|
||
private contextName: string|null, private i18nContext: I18nContext|null,
|
||
private templateIndex: number|null, private templateName: string|null,
|
||
private directiveMatcher: SelectorMatcher|null, private directives: Set<o.Expression>,
|
||
private pipeTypeByName: Map<string, o.Expression>, private pipes: Set<o.Expression>,
|
||
private _namespace: o.ExternalReference, private relativeContextFilePath: string,
|
||
private i18nUseExternalIds: boolean) {
|
||
this._bindingScope = parentBindingScope.nestedScope(level);
|
||
|
||
// Turn the relative context file path into an identifier by replacing non-alphanumeric
|
||
// characters with underscores.
|
||
this.fileBasedI18nSuffix = relativeContextFilePath.replace(/[^A-Za-z0-9]/g, '_') + '_';
|
||
|
||
this._valueConverter = new ValueConverter(
|
||
constantPool, () => this.allocateDataSlot(),
|
||
(numSlots: number) => this.allocatePureFunctionSlots(numSlots),
|
||
(name, localName, slot, value: o.ReadVarExpr) => {
|
||
const pipeType = pipeTypeByName.get(name);
|
||
if (pipeType) {
|
||
this.pipes.add(pipeType);
|
||
}
|
||
this._bindingScope.set(this.level, localName, value);
|
||
this.creationInstruction(null, R3.pipe, [o.literal(slot), o.literal(name)]);
|
||
});
|
||
}
|
||
|
||
registerContextVariables(variable: t.Variable) {
|
||
const scopedName = this._bindingScope.freshReferenceName();
|
||
const retrievalLevel = this.level;
|
||
const lhs = o.variable(variable.name + scopedName);
|
||
this._bindingScope.set(
|
||
retrievalLevel, variable.name, lhs, DeclarationPriority.CONTEXT,
|
||
(scope: BindingScope, relativeLevel: number) => {
|
||
let rhs: o.Expression;
|
||
if (scope.bindingLevel === retrievalLevel) {
|
||
// e.g. ctx
|
||
rhs = o.variable(CONTEXT_NAME);
|
||
} else {
|
||
const sharedCtxVar = scope.getSharedContextName(retrievalLevel);
|
||
// e.g. ctx_r0 OR x(2);
|
||
rhs = sharedCtxVar ? sharedCtxVar : generateNextContextExpr(relativeLevel);
|
||
}
|
||
// e.g. const $item$ = x(2).$implicit;
|
||
return [lhs.set(rhs.prop(variable.value || IMPLICIT_REFERENCE)).toConstDecl()];
|
||
});
|
||
}
|
||
|
||
buildTemplateFunction(
|
||
nodes: t.Node[], variables: t.Variable[], ngContentSelectorsOffset: number = 0,
|
||
i18n?: i18n.AST): o.FunctionExpr {
|
||
this._ngContentSelectorsOffset = ngContentSelectorsOffset;
|
||
|
||
if (this._namespace !== R3.namespaceHTML) {
|
||
this.creationInstruction(null, this._namespace);
|
||
}
|
||
|
||
// Create variable bindings
|
||
variables.forEach(v => this.registerContextVariables(v));
|
||
|
||
// Initiate i18n context in case:
|
||
// - this template has parent i18n context
|
||
// - or the template has i18n meta associated with it,
|
||
// but it's not initiated by the Element (e.g. <ng-template i18n>)
|
||
const initI18nContext =
|
||
this.i18nContext || (isI18nRootNode(i18n) && !isSingleI18nIcu(i18n) &&
|
||
!(isSingleElementTemplate(nodes) && nodes[0].i18n === i18n));
|
||
const selfClosingI18nInstruction = hasTextChildrenOnly(nodes);
|
||
if (initI18nContext) {
|
||
this.i18nStart(null, i18n !, selfClosingI18nInstruction);
|
||
}
|
||
|
||
// This is the initial pass through the nodes of this template. In this pass, we
|
||
// queue all creation mode and update mode instructions for generation in the second
|
||
// pass. It's necessary to separate the passes to ensure local refs are defined before
|
||
// resolving bindings. We also count bindings in this pass as we walk bound expressions.
|
||
t.visitAll(this, nodes);
|
||
|
||
// Add total binding count to pure function count so pure function instructions are
|
||
// generated with the correct slot offset when update instructions are processed.
|
||
this._pureFunctionSlots += this._bindingSlots;
|
||
|
||
// Pipes are walked in the first pass (to enqueue `pipe()` creation instructions and
|
||
// `pipeBind` update instructions), so we have to update the slot offsets manually
|
||
// to account for bindings.
|
||
this._valueConverter.updatePipeSlotOffsets(this._bindingSlots);
|
||
|
||
// Nested templates must be processed before creation instructions so template()
|
||
// instructions can be generated with the correct internal const count.
|
||
this._nestedTemplateFns.forEach(buildTemplateFn => buildTemplateFn());
|
||
|
||
// Output the `projectionDef` instruction when some `<ng-content>` are present.
|
||
// The `projectionDef` instruction only emitted for the component template and it is skipped for
|
||
// nested templates (<ng-template> tags).
|
||
if (this.level === 0 && this._hasNgContent) {
|
||
const parameters: o.Expression[] = [];
|
||
|
||
// Only selectors with a non-default value are generated
|
||
if (this._ngContentSelectors.length) {
|
||
const r3Selectors = this._ngContentSelectors.map(s => core.parseSelectorToR3Selector(s));
|
||
parameters.push(this.constantPool.getConstLiteral(asLiteral(r3Selectors), true));
|
||
}
|
||
|
||
// Since we accumulate ngContent selectors while processing template elements,
|
||
// we *prepend* `projectionDef` to creation instructions block, to put it before
|
||
// any `projection` instructions
|
||
this.creationInstruction(null, R3.projectionDef, parameters, /* prepend */ true);
|
||
}
|
||
|
||
if (initI18nContext) {
|
||
this.i18nEnd(null, selfClosingI18nInstruction);
|
||
}
|
||
|
||
// Generate all the creation mode instructions (e.g. resolve bindings in listeners)
|
||
const creationStatements = this._creationCodeFns.map((fn: () => o.Statement) => fn());
|
||
|
||
// Generate all the update mode instructions (e.g. resolve property or text bindings)
|
||
const updateStatements = this._updateCodeFns.map((fn: () => o.Statement) => fn());
|
||
|
||
// Variable declaration must occur after binding resolution so we can generate context
|
||
// instructions that build on each other.
|
||
// e.g. const b = nextContext().$implicit(); const b = nextContext();
|
||
const creationVariables = this._bindingScope.viewSnapshotStatements();
|
||
const updateVariables = this._bindingScope.variableDeclarations().concat(this._tempVariables);
|
||
|
||
const creationBlock = creationStatements.length > 0 ?
|
||
[renderFlagCheckIfStmt(
|
||
core.RenderFlags.Create, creationVariables.concat(creationStatements))] :
|
||
[];
|
||
|
||
const updateBlock = updateStatements.length > 0 ?
|
||
[renderFlagCheckIfStmt(core.RenderFlags.Update, updateVariables.concat(updateStatements))] :
|
||
[];
|
||
|
||
return o.fn(
|
||
// i.e. (rf: RenderFlags, ctx: any)
|
||
[new o.FnParam(RENDER_FLAGS, o.NUMBER_TYPE), new o.FnParam(CONTEXT_NAME, null)],
|
||
[
|
||
// Temporary variable declarations for query refresh (i.e. let _t: any;)
|
||
...this._prefixCode,
|
||
// Creating mode (i.e. if (rf & RenderFlags.Create) { ... })
|
||
...creationBlock,
|
||
// Binding and refresh mode (i.e. if (rf & RenderFlags.Update) {...})
|
||
...updateBlock,
|
||
],
|
||
o.INFERRED_TYPE, null, this.templateName);
|
||
}
|
||
|
||
// LocalResolver
|
||
getLocal(name: string): o.Expression|null { return this._bindingScope.get(name); }
|
||
|
||
i18nTranslate(
|
||
message: i18n.Message, params: {[name: string]: o.Expression} = {}, ref?: o.ReadVarExpr,
|
||
transformFn?: (raw: o.ReadVarExpr) => o.Expression): o.ReadVarExpr {
|
||
const _ref = ref || o.variable(this.constantPool.uniqueName(TRANSLATION_PREFIX));
|
||
// Closure Compiler requires const names to start with `MSG_` but disallows any other const to
|
||
// start with `MSG_`. We define a variable starting with `MSG_` just for the `goog.getMsg` call
|
||
const closureVar = this.i18nGenerateClosureVar(message.id);
|
||
const _params: {[key: string]: any} = {};
|
||
if (params && Object.keys(params).length) {
|
||
Object.keys(params).forEach(key => _params[formatI18nPlaceholderName(key)] = params[key]);
|
||
}
|
||
const meta = metaFromI18nMessage(message);
|
||
const content = getSerializedI18nContent(message);
|
||
const statements =
|
||
getTranslationDeclStmts(_ref, closureVar, content, meta, _params, transformFn);
|
||
this.constantPool.statements.push(...statements);
|
||
return _ref;
|
||
}
|
||
|
||
i18nAppendBindings(expressions: AST[]) {
|
||
if (expressions.length > 0) {
|
||
expressions.forEach(expression => this.i18n !.appendBinding(expression));
|
||
}
|
||
}
|
||
|
||
i18nBindProps(props: {[key: string]: t.Text | t.BoundText}): {[key: string]: o.Expression} {
|
||
const bound: {[key: string]: o.Expression} = {};
|
||
Object.keys(props).forEach(key => {
|
||
const prop = props[key];
|
||
if (prop instanceof t.Text) {
|
||
bound[key] = o.literal(prop.value);
|
||
} else {
|
||
const value = prop.value.visit(this._valueConverter);
|
||
this.allocateBindingSlots(value);
|
||
if (value instanceof Interpolation) {
|
||
const {strings, expressions} = value;
|
||
const {id, bindings} = this.i18n !;
|
||
const label = assembleI18nBoundString(strings, bindings.size, id);
|
||
this.i18nAppendBindings(expressions);
|
||
bound[key] = o.literal(label);
|
||
}
|
||
}
|
||
});
|
||
return bound;
|
||
}
|
||
|
||
i18nGenerateClosureVar(messageId: string): o.ReadVarExpr {
|
||
let name: string;
|
||
const suffix = this.fileBasedI18nSuffix.toUpperCase();
|
||
if (this.i18nUseExternalIds) {
|
||
const prefix = getTranslationConstPrefix(`EXTERNAL_`);
|
||
const uniqueSuffix = this.constantPool.uniqueName(suffix);
|
||
name = `${prefix}${sanitizeIdentifier(messageId)}$$${uniqueSuffix}`;
|
||
} else {
|
||
const prefix = getTranslationConstPrefix(suffix);
|
||
name = this.constantPool.uniqueName(prefix);
|
||
}
|
||
return o.variable(name);
|
||
}
|
||
|
||
i18nUpdateRef(context: I18nContext): void {
|
||
const {icus, meta, isRoot, isResolved, isEmitted} = context;
|
||
if (isRoot && isResolved && !isEmitted && !isSingleI18nIcu(meta)) {
|
||
context.isEmitted = true;
|
||
const placeholders = context.getSerializedPlaceholders();
|
||
let icuMapping: {[name: string]: o.Expression} = {};
|
||
let params: {[name: string]: o.Expression} =
|
||
placeholders.size ? placeholdersToParams(placeholders) : {};
|
||
if (icus.size) {
|
||
icus.forEach((refs: o.Expression[], key: string) => {
|
||
if (refs.length === 1) {
|
||
// if we have one ICU defined for a given
|
||
// placeholder - just output its reference
|
||
params[key] = refs[0];
|
||
} else {
|
||
// ... otherwise we need to activate post-processing
|
||
// to replace ICU placeholders with proper values
|
||
const placeholder: string = wrapI18nPlaceholder(`${I18N_ICU_MAPPING_PREFIX}${key}`);
|
||
params[key] = o.literal(placeholder);
|
||
icuMapping[key] = o.literalArr(refs);
|
||
}
|
||
});
|
||
}
|
||
|
||
// translation requires post processing in 2 cases:
|
||
// - if we have placeholders with multiple values (ex. `START_DIV`: [<5B>#1<>, <20>#2<>, ...])
|
||
// - if we have multiple ICUs that refer to the same placeholder name
|
||
const needsPostprocessing =
|
||
Array.from(placeholders.values()).some((value: string[]) => value.length > 1) ||
|
||
Object.keys(icuMapping).length;
|
||
|
||
let transformFn;
|
||
if (needsPostprocessing) {
|
||
transformFn = (raw: o.ReadVarExpr) => {
|
||
const args: o.Expression[] = [raw];
|
||
if (Object.keys(icuMapping).length) {
|
||
args.push(mapLiteral(icuMapping, true));
|
||
}
|
||
return instruction(null, R3.i18nPostprocess, args);
|
||
};
|
||
}
|
||
this.i18nTranslate(meta as i18n.Message, params, context.ref, transformFn);
|
||
}
|
||
}
|
||
|
||
i18nStart(span: ParseSourceSpan|null = null, meta: i18n.AST, selfClosing?: boolean): void {
|
||
const index = this.allocateDataSlot();
|
||
if (this.i18nContext) {
|
||
this.i18n = this.i18nContext.forkChildContext(index, this.templateIndex !, meta);
|
||
} else {
|
||
const ref = o.variable(this.constantPool.uniqueName(TRANSLATION_PREFIX));
|
||
this.i18n = new I18nContext(index, ref, 0, this.templateIndex, meta);
|
||
}
|
||
|
||
// generate i18nStart instruction
|
||
const {id, ref} = this.i18n;
|
||
const params: o.Expression[] = [o.literal(index), ref];
|
||
if (id > 0) {
|
||
// do not push 3rd argument (sub-block id)
|
||
// into i18nStart call for top level i18n context
|
||
params.push(o.literal(id));
|
||
}
|
||
this.creationInstruction(span, selfClosing ? R3.i18n : R3.i18nStart, params);
|
||
}
|
||
|
||
i18nEnd(span: ParseSourceSpan|null = null, selfClosing?: boolean): void {
|
||
if (!this.i18n) {
|
||
throw new Error('i18nEnd is executed with no i18n context present');
|
||
}
|
||
|
||
if (this.i18nContext) {
|
||
this.i18nContext.reconcileChildContext(this.i18n);
|
||
this.i18nUpdateRef(this.i18nContext);
|
||
} else {
|
||
this.i18nUpdateRef(this.i18n);
|
||
}
|
||
|
||
// setup accumulated bindings
|
||
const {index, bindings} = this.i18n;
|
||
if (bindings.size) {
|
||
bindings.forEach(binding => {
|
||
this.updateInstruction(
|
||
index, span, R3.i18nExp,
|
||
() => [this.convertPropertyBinding(o.variable(CONTEXT_NAME), binding)]);
|
||
});
|
||
this.updateInstruction(index, span, R3.i18nApply, [o.literal(index)]);
|
||
}
|
||
if (!selfClosing) {
|
||
this.creationInstruction(span, R3.i18nEnd);
|
||
}
|
||
this.i18n = null; // reset local i18n context
|
||
}
|
||
|
||
visitContent(ngContent: t.Content) {
|
||
this._hasNgContent = true;
|
||
const slot = this.allocateDataSlot();
|
||
let selectorIndex = ngContent.selector === DEFAULT_NG_CONTENT_SELECTOR ?
|
||
0 :
|
||
this._ngContentSelectors.push(ngContent.selector) + this._ngContentSelectorsOffset;
|
||
const parameters: o.Expression[] = [o.literal(slot)];
|
||
const attributes: o.Expression[] = [];
|
||
|
||
ngContent.attributes.forEach((attribute) => {
|
||
const {name, value} = attribute;
|
||
if (name === NG_PROJECT_AS_ATTR_NAME) {
|
||
attributes.push(...getNgProjectAsLiteral(attribute));
|
||
} else if (name.toLowerCase() !== NG_CONTENT_SELECT_ATTR) {
|
||
attributes.push(o.literal(name), o.literal(value));
|
||
}
|
||
});
|
||
|
||
if (attributes.length > 0) {
|
||
parameters.push(o.literal(selectorIndex), o.literalArr(attributes));
|
||
} else if (selectorIndex !== 0) {
|
||
parameters.push(o.literal(selectorIndex));
|
||
}
|
||
|
||
this.creationInstruction(ngContent.sourceSpan, R3.projection, parameters);
|
||
}
|
||
|
||
|
||
getNamespaceInstruction(namespaceKey: string|null) {
|
||
switch (namespaceKey) {
|
||
case 'math':
|
||
return R3.namespaceMathML;
|
||
case 'svg':
|
||
return R3.namespaceSVG;
|
||
default:
|
||
return R3.namespaceHTML;
|
||
}
|
||
}
|
||
|
||
addNamespaceInstruction(nsInstruction: o.ExternalReference, element: t.Element) {
|
||
this._namespace = nsInstruction;
|
||
this.creationInstruction(element.sourceSpan, nsInstruction);
|
||
}
|
||
|
||
visitElement(element: t.Element) {
|
||
const elementIndex = this.allocateDataSlot();
|
||
const stylingBuilder = new StylingBuilder(o.literal(elementIndex), null);
|
||
|
||
let isNonBindableMode: boolean = false;
|
||
const isI18nRootElement: boolean =
|
||
isI18nRootNode(element.i18n) && !isSingleI18nIcu(element.i18n);
|
||
|
||
if (isI18nRootElement && this.i18n) {
|
||
throw new Error(`Could not mark an element as translatable inside of a translatable section`);
|
||
}
|
||
|
||
const i18nAttrs: (t.TextAttribute | t.BoundAttribute)[] = [];
|
||
const outputAttrs: t.TextAttribute[] = [];
|
||
|
||
const [namespaceKey, elementName] = splitNsName(element.name);
|
||
const isNgContainer = checkIsNgContainer(element.name);
|
||
|
||
// Handle styling, i18n, ngNonBindable attributes
|
||
for (const attr of element.attributes) {
|
||
const {name, value} = attr;
|
||
if (name === NON_BINDABLE_ATTR) {
|
||
isNonBindableMode = true;
|
||
} else if (name === 'style') {
|
||
stylingBuilder.registerStyleAttr(value);
|
||
} else if (name === 'class') {
|
||
stylingBuilder.registerClassAttr(value);
|
||
} else {
|
||
if (attr.i18n) {
|
||
// Place attributes into a separate array for i18n processing, but also keep such
|
||
// attributes in the main list to make them available for directive matching at runtime.
|
||
// TODO(FW-1248): prevent attributes duplication in `i18nAttributes` and `elementStart`
|
||
// arguments
|
||
i18nAttrs.push(attr);
|
||
}
|
||
outputAttrs.push(attr);
|
||
}
|
||
}
|
||
|
||
// Match directives on non i18n attributes
|
||
this.matchDirectives(element.name, element);
|
||
|
||
// Regular element or ng-container creation mode
|
||
const parameters: o.Expression[] = [o.literal(elementIndex)];
|
||
if (!isNgContainer) {
|
||
parameters.push(o.literal(elementName));
|
||
}
|
||
|
||
// Add the attributes
|
||
const attributes: o.Expression[] = [];
|
||
const allOtherInputs: t.BoundAttribute[] = [];
|
||
|
||
element.inputs.forEach((input: t.BoundAttribute) => {
|
||
const stylingInputWasSet = stylingBuilder.registerBoundInput(input);
|
||
if (!stylingInputWasSet) {
|
||
if (input.type === BindingType.Property && input.i18n) {
|
||
// Place attributes into a separate array for i18n processing, but also keep such
|
||
// attributes in the main list to make them available for directive matching at runtime.
|
||
// TODO(FW-1248): prevent attributes duplication in `i18nAttributes` and `elementStart`
|
||
// arguments
|
||
i18nAttrs.push(input);
|
||
}
|
||
allOtherInputs.push(input);
|
||
}
|
||
});
|
||
|
||
outputAttrs.forEach(attr => {
|
||
if (attr.name === NG_PROJECT_AS_ATTR_NAME) {
|
||
attributes.push(...getNgProjectAsLiteral(attr));
|
||
} else {
|
||
attributes.push(...getAttributeNameLiterals(attr.name), o.literal(attr.value));
|
||
}
|
||
});
|
||
|
||
// add attributes for directive and projection matching purposes
|
||
attributes.push(...this.prepareNonRenderAttrs(allOtherInputs, element.outputs, stylingBuilder));
|
||
parameters.push(this.toAttrsParam(attributes));
|
||
|
||
// local refs (ex.: <div #foo #bar="baz">)
|
||
parameters.push(this.prepareRefsParameter(element.references));
|
||
|
||
const wasInNamespace = this._namespace;
|
||
const currentNamespace = this.getNamespaceInstruction(namespaceKey);
|
||
|
||
// If the namespace is changing now, include an instruction to change it
|
||
// during element creation.
|
||
if (currentNamespace !== wasInNamespace) {
|
||
this.addNamespaceInstruction(currentNamespace, element);
|
||
}
|
||
|
||
const implicit = o.variable(CONTEXT_NAME);
|
||
|
||
if (this.i18n) {
|
||
this.i18n.appendElement(element.i18n !, elementIndex);
|
||
}
|
||
|
||
const hasChildren = () => {
|
||
if (!isI18nRootElement && this.i18n) {
|
||
// we do not append text node instructions and ICUs inside i18n section,
|
||
// so we exclude them while calculating whether current element has children
|
||
return !hasTextChildrenOnly(element.children);
|
||
}
|
||
return element.children.length > 0;
|
||
};
|
||
|
||
const createSelfClosingInstruction = !stylingBuilder.hasBindings && !isNgContainer &&
|
||
element.outputs.length === 0 && i18nAttrs.length === 0 && !hasChildren();
|
||
|
||
const createSelfClosingI18nInstruction = !createSelfClosingInstruction &&
|
||
!stylingBuilder.hasBindings && hasTextChildrenOnly(element.children);
|
||
|
||
if (createSelfClosingInstruction) {
|
||
this.creationInstruction(element.sourceSpan, R3.element, trimTrailingNulls(parameters));
|
||
} else {
|
||
this.creationInstruction(
|
||
element.sourceSpan, isNgContainer ? R3.elementContainerStart : R3.elementStart,
|
||
trimTrailingNulls(parameters));
|
||
|
||
if (isNonBindableMode) {
|
||
this.creationInstruction(element.sourceSpan, R3.disableBindings);
|
||
}
|
||
|
||
// process i18n element attributes
|
||
if (i18nAttrs.length) {
|
||
let hasBindings: boolean = false;
|
||
const i18nAttrArgs: o.Expression[] = [];
|
||
i18nAttrs.forEach(attr => {
|
||
const message = attr.i18n !as i18n.Message;
|
||
if (attr instanceof t.TextAttribute) {
|
||
i18nAttrArgs.push(o.literal(attr.name), this.i18nTranslate(message));
|
||
} else {
|
||
const converted = attr.value.visit(this._valueConverter);
|
||
this.allocateBindingSlots(converted);
|
||
if (converted instanceof Interpolation) {
|
||
const placeholders = assembleBoundTextPlaceholders(message);
|
||
const params = placeholdersToParams(placeholders);
|
||
i18nAttrArgs.push(o.literal(attr.name), this.i18nTranslate(message, params));
|
||
converted.expressions.forEach(expression => {
|
||
hasBindings = true;
|
||
this.updateInstruction(
|
||
elementIndex, element.sourceSpan, R3.i18nExp,
|
||
() => [this.convertExpressionBinding(implicit, expression)]);
|
||
});
|
||
}
|
||
}
|
||
});
|
||
if (i18nAttrArgs.length) {
|
||
const index: o.Expression = o.literal(this.allocateDataSlot());
|
||
const args = this.constantPool.getConstLiteral(o.literalArr(i18nAttrArgs), true);
|
||
this.creationInstruction(element.sourceSpan, R3.i18nAttributes, [index, args]);
|
||
if (hasBindings) {
|
||
this.updateInstruction(elementIndex, element.sourceSpan, R3.i18nApply, [index]);
|
||
}
|
||
}
|
||
}
|
||
|
||
// The style bindings code is placed into two distinct blocks within the template function AOT
|
||
// code: creation and update. The creation code contains the `styling` instructions
|
||
// which will apply the collected binding values to the element. `styling` is
|
||
// designed to run inside of `elementStart` and `elementEnd`. The update instructions
|
||
// (things like `styleProp`, `classProp`, etc..) are applied later on in this
|
||
// file
|
||
this.processStylingInstruction(
|
||
elementIndex, implicit,
|
||
stylingBuilder.buildStylingInstruction(element.sourceSpan, this.constantPool), true);
|
||
|
||
// Generate Listeners (outputs)
|
||
element.outputs.forEach((outputAst: t.BoundEvent) => {
|
||
this.creationInstruction(
|
||
outputAst.sourceSpan, R3.listener,
|
||
this.prepareListenerParameter(element.name, outputAst, elementIndex));
|
||
});
|
||
|
||
// Note: it's important to keep i18n/i18nStart instructions after i18nAttributes and
|
||
// listeners, to make sure i18nAttributes instruction targets current element at runtime.
|
||
if (isI18nRootElement) {
|
||
this.i18nStart(element.sourceSpan, element.i18n !, createSelfClosingI18nInstruction);
|
||
}
|
||
}
|
||
|
||
// the code here will collect all update-level styling instructions and add them to the
|
||
// update block of the template function AOT code. Instructions like `styleProp`,
|
||
// `styleMap`, `classMap`, `classProp` and `stylingApply`
|
||
// are all generated and assigned in the code below.
|
||
const stylingInstructions = stylingBuilder.buildUpdateLevelInstructions(this._valueConverter);
|
||
const limit = stylingInstructions.length - 1;
|
||
for (let i = 0; i <= limit; i++) {
|
||
const instruction = stylingInstructions[i];
|
||
this._bindingSlots += instruction.allocateBindingSlots;
|
||
this.processStylingInstruction(elementIndex, implicit, instruction, false);
|
||
}
|
||
|
||
// the reason why `undefined` is used is because the renderer understands this as a
|
||
// special value to symbolize that there is no RHS to this binding
|
||
// TODO (matsko): revisit this once FW-959 is approached
|
||
const emptyValueBindInstruction = o.literal(undefined);
|
||
|
||
// Generate element input bindings
|
||
allOtherInputs.forEach((input: t.BoundAttribute) => {
|
||
const inputType = input.type;
|
||
if (inputType === BindingType.Animation) {
|
||
const value = input.value.visit(this._valueConverter);
|
||
// animation bindings can be presented in the following formats:
|
||
// 1. [@binding]="fooExp"
|
||
// 2. [@binding]="{value:fooExp, params:{...}}"
|
||
// 3. [@binding]
|
||
// 4. @binding
|
||
// All formats will be valid for when a synthetic binding is created.
|
||
// The reasoning for this is because the renderer should get each
|
||
// synthetic binding value in the order of the array that they are
|
||
// defined in...
|
||
const hasValue = value instanceof LiteralPrimitive ? !!value.value : true;
|
||
this.allocateBindingSlots(value);
|
||
const bindingName = prepareSyntheticPropertyName(input.name);
|
||
|
||
this.updateInstruction(elementIndex, input.sourceSpan, R3.property, () => {
|
||
return [
|
||
o.literal(bindingName),
|
||
(hasValue ? this.convertPropertyBinding(implicit, value, /* skipBindFn */ true) :
|
||
emptyValueBindInstruction),
|
||
];
|
||
});
|
||
} else {
|
||
// we must skip attributes with associated i18n context, since these attributes are handled
|
||
// separately and corresponding `i18nExp` and `i18nApply` instructions will be generated
|
||
if (input.i18n) return;
|
||
|
||
const value = input.value.visit(this._valueConverter);
|
||
if (value !== undefined) {
|
||
const params: any[] = [];
|
||
const [attrNamespace, attrName] = splitNsName(input.name);
|
||
const isAttributeBinding = inputType === BindingType.Attribute;
|
||
const sanitizationRef = resolveSanitizationFn(input.securityContext, isAttributeBinding);
|
||
if (sanitizationRef) params.push(sanitizationRef);
|
||
if (attrNamespace) {
|
||
const namespaceLiteral = o.literal(attrNamespace);
|
||
|
||
if (sanitizationRef) {
|
||
params.push(namespaceLiteral);
|
||
} else {
|
||
// If there wasn't a sanitization ref, we need to add
|
||
// an extra param so that we can pass in the namespace.
|
||
params.push(o.literal(null), namespaceLiteral);
|
||
}
|
||
}
|
||
this.allocateBindingSlots(value);
|
||
|
||
if (inputType === BindingType.Property) {
|
||
if (value instanceof Interpolation) {
|
||
// prop="{{value}}" and friends
|
||
this.interpolatedUpdateInstruction(
|
||
getPropertyInterpolationExpression(value), elementIndex, attrName, input, value,
|
||
params);
|
||
} else {
|
||
// [prop]="value"
|
||
this.boundUpdateInstruction(
|
||
R3.property, elementIndex, attrName, input, implicit, value, params);
|
||
}
|
||
} else if (inputType === BindingType.Attribute) {
|
||
if (value instanceof Interpolation && getInterpolationArgsLength(value) > 1) {
|
||
// attr.name="text{{value}}" and friends
|
||
this.interpolatedUpdateInstruction(
|
||
getAttributeInterpolationExpression(value), elementIndex, attrName, input, value,
|
||
params);
|
||
} else {
|
||
const boundValue = value instanceof Interpolation ? value.expressions[0] : value;
|
||
// [attr.name]="value" or attr.name="{{value}}"
|
||
this.boundUpdateInstruction(
|
||
R3.attribute, elementIndex, attrName, input, implicit, boundValue, params);
|
||
}
|
||
} else {
|
||
// class prop
|
||
this.updateInstruction(elementIndex, input.sourceSpan, R3.classProp, () => {
|
||
return [
|
||
o.literal(elementIndex), o.literal(attrName),
|
||
this.convertPropertyBinding(implicit, value), ...params
|
||
];
|
||
});
|
||
}
|
||
}
|
||
}
|
||
});
|
||
|
||
// Traverse element child nodes
|
||
t.visitAll(this, element.children);
|
||
|
||
if (!isI18nRootElement && this.i18n) {
|
||
this.i18n.appendElement(element.i18n !, elementIndex, true);
|
||
}
|
||
|
||
if (!createSelfClosingInstruction) {
|
||
// Finish element construction mode.
|
||
const span = element.endSourceSpan || element.sourceSpan;
|
||
if (isI18nRootElement) {
|
||
this.i18nEnd(span, createSelfClosingI18nInstruction);
|
||
}
|
||
if (isNonBindableMode) {
|
||
this.creationInstruction(span, R3.enableBindings);
|
||
}
|
||
this.creationInstruction(span, isNgContainer ? R3.elementContainerEnd : R3.elementEnd);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Adds an update instruction for a bound property or attribute, such as `[prop]="value"` or
|
||
* `[attr.title]="value"`
|
||
*/
|
||
boundUpdateInstruction(
|
||
instruction: o.ExternalReference, elementIndex: number, attrName: string,
|
||
input: t.BoundAttribute, implicit: o.ReadVarExpr, value: any, params: any[]) {
|
||
this.updateInstruction(elementIndex, input.sourceSpan, instruction, () => {
|
||
return [o.literal(attrName), this.convertPropertyBinding(implicit, value, true), ...params];
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Adds an update instruction for an interpolated property or attribute, such as
|
||
* `prop="{{value}}"` or `attr.title="{{value}}"`
|
||
*/
|
||
interpolatedUpdateInstruction(
|
||
instruction: o.ExternalReference, elementIndex: number, attrName: string,
|
||
input: t.BoundAttribute, value: any, params: any[]) {
|
||
this.updateInstruction(
|
||
elementIndex, input.sourceSpan, instruction,
|
||
() =>
|
||
[o.literal(attrName),
|
||
...this.getUpdateInstructionArguments(o.variable(CONTEXT_NAME), value), ...params]);
|
||
}
|
||
|
||
visitTemplate(template: t.Template) {
|
||
const NG_TEMPLATE_TAG_NAME = 'ng-template';
|
||
const templateIndex = this.allocateDataSlot();
|
||
|
||
if (this.i18n) {
|
||
this.i18n.appendTemplate(template.i18n !, templateIndex);
|
||
}
|
||
|
||
const tagName = sanitizeIdentifier(template.tagName || '');
|
||
const contextName = `${this.contextName}${tagName ? '_' + tagName : ''}_${templateIndex}`;
|
||
const templateName = `${contextName}_Template`;
|
||
|
||
const parameters: o.Expression[] = [
|
||
o.literal(templateIndex),
|
||
o.variable(templateName),
|
||
|
||
// We don't care about the tag's namespace here, because we infer
|
||
// it based on the parent nodes inside the template instruction.
|
||
o.literal(template.tagName ? splitNsName(template.tagName)[1] : template.tagName),
|
||
];
|
||
|
||
// find directives matching on a given <ng-template> node
|
||
this.matchDirectives(NG_TEMPLATE_TAG_NAME, template);
|
||
|
||
// prepare attributes parameter (including attributes used for directive matching)
|
||
const attrsExprs: o.Expression[] = [];
|
||
template.attributes.forEach(
|
||
(a: t.TextAttribute) => { attrsExprs.push(asLiteral(a.name), asLiteral(a.value)); });
|
||
attrsExprs.push(...this.prepareNonRenderAttrs(
|
||
template.inputs, template.outputs, undefined, template.templateAttrs));
|
||
parameters.push(this.toAttrsParam(attrsExprs));
|
||
|
||
// local refs (ex.: <ng-template #foo>)
|
||
if (template.references && template.references.length) {
|
||
parameters.push(this.prepareRefsParameter(template.references));
|
||
parameters.push(o.importExpr(R3.templateRefExtractor));
|
||
}
|
||
|
||
// Create the template function
|
||
const templateVisitor = new TemplateDefinitionBuilder(
|
||
this.constantPool, this._bindingScope, this.level + 1, contextName, this.i18n,
|
||
templateIndex, templateName, this.directiveMatcher, this.directives, this.pipeTypeByName,
|
||
this.pipes, this._namespace, this.fileBasedI18nSuffix, this.i18nUseExternalIds);
|
||
|
||
// Nested templates must not be visited until after their parent templates have completed
|
||
// processing, so they are queued here until after the initial pass. Otherwise, we wouldn't
|
||
// be able to support bindings in nested templates to local refs that occur after the
|
||
// template definition. e.g. <div *ngIf="showing">{{ foo }}</div> <div #foo></div>
|
||
this._nestedTemplateFns.push(() => {
|
||
const templateFunctionExpr = templateVisitor.buildTemplateFunction(
|
||
template.children, template.variables,
|
||
this._ngContentSelectors.length + this._ngContentSelectorsOffset, template.i18n);
|
||
this.constantPool.statements.push(templateFunctionExpr.toDeclStmt(templateName, null));
|
||
if (templateVisitor._hasNgContent) {
|
||
this._hasNgContent = true;
|
||
this._ngContentSelectors.push(...templateVisitor._ngContentSelectors);
|
||
}
|
||
});
|
||
|
||
// e.g. template(1, MyComp_Template_1)
|
||
this.creationInstruction(template.sourceSpan, R3.templateCreate, () => {
|
||
parameters.splice(
|
||
2, 0, o.literal(templateVisitor.getConstCount()),
|
||
o.literal(templateVisitor.getVarCount()));
|
||
return trimTrailingNulls(parameters);
|
||
});
|
||
|
||
// handle property bindings e.g. ɵɵproperty('ngForOf', ctx.items), et al;
|
||
const context = o.variable(CONTEXT_NAME);
|
||
this.templatePropertyBindings(template, templateIndex, context, template.templateAttrs);
|
||
|
||
// Only add normal input/output binding instructions on explicit ng-template elements.
|
||
if (template.tagName === NG_TEMPLATE_TAG_NAME) {
|
||
// Add the input bindings
|
||
this.templatePropertyBindings(template, templateIndex, context, template.inputs);
|
||
// Generate listeners for directive output
|
||
template.outputs.forEach((outputAst: t.BoundEvent) => {
|
||
this.creationInstruction(
|
||
outputAst.sourceSpan, R3.listener,
|
||
this.prepareListenerParameter('ng_template', outputAst, templateIndex));
|
||
});
|
||
}
|
||
}
|
||
|
||
// These should be handled in the template or element directly.
|
||
readonly visitReference = invalid;
|
||
readonly visitVariable = invalid;
|
||
readonly visitTextAttribute = invalid;
|
||
readonly visitBoundAttribute = invalid;
|
||
readonly visitBoundEvent = invalid;
|
||
|
||
visitBoundText(text: t.BoundText) {
|
||
if (this.i18n) {
|
||
const value = text.value.visit(this._valueConverter);
|
||
this.allocateBindingSlots(value);
|
||
if (value instanceof Interpolation) {
|
||
this.i18n.appendBoundText(text.i18n !);
|
||
this.i18nAppendBindings(value.expressions);
|
||
}
|
||
return;
|
||
}
|
||
|
||
const nodeIndex = this.allocateDataSlot();
|
||
|
||
this.creationInstruction(text.sourceSpan, R3.text, [o.literal(nodeIndex)]);
|
||
|
||
const value = text.value.visit(this._valueConverter);
|
||
this.allocateBindingSlots(value);
|
||
|
||
if (value instanceof Interpolation) {
|
||
this.updateInstruction(
|
||
nodeIndex, text.sourceSpan, getTextInterpolationExpression(value),
|
||
() => this.getUpdateInstructionArguments(o.variable(CONTEXT_NAME), value));
|
||
} else {
|
||
this.updateInstruction(
|
||
nodeIndex, text.sourceSpan, R3.textBinding,
|
||
() =>
|
||
[o.literal(nodeIndex), this.convertPropertyBinding(o.variable(CONTEXT_NAME), value)]);
|
||
}
|
||
}
|
||
|
||
visitText(text: t.Text) {
|
||
// when a text element is located within a translatable
|
||
// block, we exclude this text element from instructions set,
|
||
// since it will be captured in i18n content and processed at runtime
|
||
if (!this.i18n) {
|
||
this.creationInstruction(
|
||
text.sourceSpan, R3.text, [o.literal(this.allocateDataSlot()), o.literal(text.value)]);
|
||
}
|
||
}
|
||
|
||
visitIcu(icu: t.Icu) {
|
||
let initWasInvoked = false;
|
||
|
||
// if an ICU was created outside of i18n block, we still treat
|
||
// it as a translatable entity and invoke i18nStart and i18nEnd
|
||
// to generate i18n context and the necessary instructions
|
||
if (!this.i18n) {
|
||
initWasInvoked = true;
|
||
this.i18nStart(null, icu.i18n !, true);
|
||
}
|
||
|
||
const i18n = this.i18n !;
|
||
const vars = this.i18nBindProps(icu.vars);
|
||
const placeholders = this.i18nBindProps(icu.placeholders);
|
||
|
||
// output ICU directly and keep ICU reference in context
|
||
const message = icu.i18n !as i18n.Message;
|
||
const transformFn = (raw: o.ReadVarExpr) =>
|
||
instruction(null, R3.i18nPostprocess, [raw, mapLiteral(vars, true)]);
|
||
|
||
// in case the whole i18n message is a single ICU - we do not need to
|
||
// create a separate top-level translation, we can use the root ref instead
|
||
// and make this ICU a top-level translation
|
||
if (isSingleI18nIcu(i18n.meta)) {
|
||
this.i18nTranslate(message, placeholders, i18n.ref, transformFn);
|
||
} else {
|
||
// output ICU directly and keep ICU reference in context
|
||
const ref = this.i18nTranslate(message, placeholders, undefined, transformFn);
|
||
i18n.appendIcu(icuFromI18nMessage(message).name, ref);
|
||
}
|
||
|
||
if (initWasInvoked) {
|
||
this.i18nEnd(null, true);
|
||
}
|
||
return null;
|
||
}
|
||
|
||
private allocateDataSlot() { return this._dataIndex++; }
|
||
|
||
getConstCount() { return this._dataIndex; }
|
||
|
||
getVarCount() { return this._pureFunctionSlots; }
|
||
|
||
getNgContentSelectors(): o.Expression|null {
|
||
return this._hasNgContent ?
|
||
this.constantPool.getConstLiteral(asLiteral(this._ngContentSelectors), true) :
|
||
null;
|
||
}
|
||
|
||
private bindingContext() { return `${this._bindingContext++}`; }
|
||
|
||
private templatePropertyBindings(
|
||
template: t.Template, templateIndex: number, context: o.ReadVarExpr,
|
||
attrs: (t.BoundAttribute|t.TextAttribute)[]) {
|
||
attrs.forEach(input => {
|
||
if (input instanceof t.BoundAttribute) {
|
||
const value = input.value.visit(this._valueConverter);
|
||
this.allocateBindingSlots(value);
|
||
this.updateInstruction(
|
||
templateIndex, template.sourceSpan, R3.property,
|
||
() => [o.literal(input.name), this.convertPropertyBinding(context, value, true)]);
|
||
}
|
||
});
|
||
}
|
||
|
||
// Bindings must only be resolved after all local refs have been visited, so all
|
||
// instructions are queued in callbacks that execute once the initial pass has completed.
|
||
// Otherwise, we wouldn't be able to support local refs that are defined after their
|
||
// bindings. e.g. {{ foo }} <div #foo></div>
|
||
private instructionFn(
|
||
fns: (() => o.Statement)[], span: ParseSourceSpan|null, reference: o.ExternalReference,
|
||
paramsOrFn: o.Expression[]|(() => o.Expression[]), prepend: boolean = false): void {
|
||
fns[prepend ? 'unshift' : 'push'](() => {
|
||
const params = Array.isArray(paramsOrFn) ? paramsOrFn : paramsOrFn();
|
||
return instruction(span, reference, params).toStmt();
|
||
});
|
||
}
|
||
|
||
private processStylingInstruction(
|
||
elementIndex: number, implicit: any, instruction: Instruction|null, createMode: boolean) {
|
||
if (instruction) {
|
||
const paramsFn = () =>
|
||
instruction.buildParams(value => this.convertPropertyBinding(implicit, value, true));
|
||
if (createMode) {
|
||
this.creationInstruction(instruction.sourceSpan, instruction.reference, paramsFn);
|
||
} else {
|
||
this.updateInstruction(
|
||
elementIndex, instruction.sourceSpan, instruction.reference, paramsFn);
|
||
}
|
||
}
|
||
}
|
||
|
||
private creationInstruction(
|
||
span: ParseSourceSpan|null, reference: o.ExternalReference,
|
||
paramsOrFn?: o.Expression[]|(() => o.Expression[]), prepend?: boolean) {
|
||
this.instructionFn(this._creationCodeFns, span, reference, paramsOrFn || [], prepend);
|
||
}
|
||
|
||
private updateInstruction(
|
||
nodeIndex: number, span: ParseSourceSpan|null, reference: o.ExternalReference,
|
||
paramsOrFn?: o.Expression[]|(() => o.Expression[])) {
|
||
if (this._lastNodeIndexWithFlush < nodeIndex) {
|
||
this.instructionFn(this._updateCodeFns, span, R3.select, [o.literal(nodeIndex)]);
|
||
this._lastNodeIndexWithFlush = nodeIndex;
|
||
}
|
||
this.instructionFn(this._updateCodeFns, span, reference, paramsOrFn || []);
|
||
}
|
||
|
||
private allocatePureFunctionSlots(numSlots: number): number {
|
||
const originalSlots = this._pureFunctionSlots;
|
||
this._pureFunctionSlots += numSlots;
|
||
return originalSlots;
|
||
}
|
||
|
||
private allocateBindingSlots(value: AST|null) {
|
||
this._bindingSlots += value instanceof Interpolation ? value.expressions.length : 1;
|
||
}
|
||
|
||
private convertExpressionBinding(implicit: o.Expression, value: AST): o.Expression {
|
||
const convertedPropertyBinding =
|
||
convertPropertyBinding(this, implicit, value, this.bindingContext(), BindingForm.TrySimple);
|
||
const valExpr = convertedPropertyBinding.currValExpr;
|
||
return o.importExpr(R3.bind).callFn([valExpr]);
|
||
}
|
||
|
||
private convertPropertyBinding(implicit: o.Expression, value: AST, skipBindFn?: boolean):
|
||
o.Expression {
|
||
const interpolationFn =
|
||
value instanceof Interpolation ? interpolate : () => error('Unexpected interpolation');
|
||
|
||
const convertedPropertyBinding = convertPropertyBinding(
|
||
this, implicit, value, this.bindingContext(), BindingForm.TrySimple, interpolationFn);
|
||
this._tempVariables.push(...convertedPropertyBinding.stmts);
|
||
|
||
const valExpr = convertedPropertyBinding.currValExpr;
|
||
return value instanceof Interpolation || skipBindFn ? valExpr :
|
||
o.importExpr(R3.bind).callFn([valExpr]);
|
||
}
|
||
|
||
/**
|
||
* Gets a list of argument expressions to pass to an update instruction expression. Also updates
|
||
* the temp variables state with temp variables that were identified as needing to be created
|
||
* while visiting the arguments.
|
||
* @param contextExpression The expression for the context variable used to create arguments
|
||
* @param value The original expression we will be resolving an arguments list from.
|
||
*/
|
||
private getUpdateInstructionArguments(contextExpression: o.Expression, value: AST):
|
||
o.Expression[] {
|
||
const {args, stmts} =
|
||
convertUpdateArguments(this, contextExpression, value, this.bindingContext());
|
||
this._tempVariables.push(...stmts);
|
||
return args;
|
||
}
|
||
|
||
private matchDirectives(tagName: string, elOrTpl: t.Element|t.Template) {
|
||
if (this.directiveMatcher) {
|
||
const selector = createCssSelector(tagName, getAttrsForDirectiveMatching(elOrTpl));
|
||
this.directiveMatcher.match(
|
||
selector, (cssSelector, staticType) => { this.directives.add(staticType); });
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Prepares all attribute expression values for the `TAttributes` array.
|
||
*
|
||
* The purpose of this function is to properly construct an attributes array that
|
||
* is passed into the `elementStart` (or just `element`) functions. Because there
|
||
* are many different types of attributes, the array needs to be constructed in a
|
||
* special way so that `elementStart` can properly evaluate them.
|
||
*
|
||
* The format looks like this:
|
||
*
|
||
* ```
|
||
* attrs = [prop, value, prop2, value2,
|
||
* CLASSES, class1, class2,
|
||
* STYLES, style1, value1, style2, value2,
|
||
* BINDINGS, name1, name2, name3,
|
||
* TEMPLATE, name4, name5, ...]
|
||
* ```
|
||
*
|
||
* Note that this function will fully ignore all synthetic (@foo) attribute values
|
||
* because those values are intended to always be generated as property instructions.
|
||
*/
|
||
private prepareNonRenderAttrs(
|
||
inputs: t.BoundAttribute[], outputs: t.BoundEvent[], styles?: StylingBuilder,
|
||
templateAttrs: (t.BoundAttribute|t.TextAttribute)[] = []): o.Expression[] {
|
||
const alreadySeen = new Set<string>();
|
||
const attrExprs: o.Expression[] = [];
|
||
|
||
function addAttrExpr(key: string | number, value?: o.Expression): void {
|
||
if (typeof key === 'string') {
|
||
if (!alreadySeen.has(key)) {
|
||
attrExprs.push(...getAttributeNameLiterals(key));
|
||
value !== undefined && attrExprs.push(value);
|
||
alreadySeen.add(key);
|
||
}
|
||
} else {
|
||
attrExprs.push(o.literal(key));
|
||
}
|
||
}
|
||
|
||
// it's important that this occurs before BINDINGS and TEMPLATE because once `elementStart`
|
||
// comes across the BINDINGS or TEMPLATE markers then it will continue reading each value as
|
||
// as single property value cell by cell.
|
||
if (styles) {
|
||
styles.populateInitialStylingAttrs(attrExprs);
|
||
}
|
||
|
||
if (inputs.length || outputs.length) {
|
||
const attrsStartIndex = attrExprs.length;
|
||
|
||
for (let i = 0; i < inputs.length; i++) {
|
||
const input = inputs[i];
|
||
if (input.type !== BindingType.Animation) {
|
||
addAttrExpr(input.name);
|
||
}
|
||
}
|
||
|
||
for (let i = 0; i < outputs.length; i++) {
|
||
const output = outputs[i];
|
||
if (output.type !== ParsedEventType.Animation) {
|
||
addAttrExpr(output.name);
|
||
}
|
||
}
|
||
|
||
// this is a cheap way of adding the marker only after all the input/output
|
||
// values have been filtered (by not including the animation ones) and added
|
||
// to the expressions. The marker is important because it tells the runtime
|
||
// code that this is where attributes without values start...
|
||
if (attrExprs.length) {
|
||
attrExprs.splice(attrsStartIndex, 0, o.literal(core.AttributeMarker.Bindings));
|
||
}
|
||
}
|
||
|
||
if (templateAttrs.length) {
|
||
attrExprs.push(o.literal(core.AttributeMarker.Template));
|
||
templateAttrs.forEach(attr => addAttrExpr(attr.name));
|
||
}
|
||
|
||
return attrExprs;
|
||
}
|
||
|
||
private toAttrsParam(attrsExprs: o.Expression[]): o.Expression {
|
||
return attrsExprs.length > 0 ?
|
||
this.constantPool.getConstLiteral(o.literalArr(attrsExprs), true) :
|
||
o.TYPED_NULL_EXPR;
|
||
}
|
||
|
||
private prepareRefsParameter(references: t.Reference[]): o.Expression {
|
||
if (!references || references.length === 0) {
|
||
return o.TYPED_NULL_EXPR;
|
||
}
|
||
|
||
const refsParam = flatten(references.map(reference => {
|
||
const slot = this.allocateDataSlot();
|
||
// Generate the update temporary.
|
||
const variableName = this._bindingScope.freshReferenceName();
|
||
const retrievalLevel = this.level;
|
||
const lhs = o.variable(variableName);
|
||
this._bindingScope.set(
|
||
retrievalLevel, reference.name, lhs,
|
||
DeclarationPriority.DEFAULT, (scope: BindingScope, relativeLevel: number) => {
|
||
// e.g. nextContext(2);
|
||
const nextContextStmt =
|
||
relativeLevel > 0 ? [generateNextContextExpr(relativeLevel).toStmt()] : [];
|
||
|
||
// e.g. const $foo$ = reference(1);
|
||
const refExpr = lhs.set(o.importExpr(R3.reference).callFn([o.literal(slot)]));
|
||
return nextContextStmt.concat(refExpr.toConstDecl());
|
||
}, true);
|
||
return [reference.name, reference.value];
|
||
}));
|
||
|
||
return this.constantPool.getConstLiteral(asLiteral(refsParam), true);
|
||
}
|
||
|
||
private prepareListenerParameter(tagName: string, outputAst: t.BoundEvent, index: number):
|
||
() => o.Expression[] {
|
||
return () => {
|
||
const eventName: string = outputAst.name;
|
||
const bindingFnName = outputAst.type === ParsedEventType.Animation ?
|
||
// synthetic @listener.foo values are treated the exact same as are standard listeners
|
||
prepareSyntheticListenerFunctionName(eventName, outputAst.phase !) :
|
||
sanitizeIdentifier(eventName);
|
||
const handlerName = `${this.templateName}_${tagName}_${bindingFnName}_${index}_listener`;
|
||
const scope = this._bindingScope.nestedScope(this._bindingScope.bindingLevel);
|
||
const context = o.variable(CONTEXT_NAME);
|
||
return prepareEventListenerParameters(outputAst, context, handlerName, scope);
|
||
};
|
||
}
|
||
}
|
||
|
||
export class ValueConverter extends AstMemoryEfficientTransformer {
|
||
private _pipeBindExprs: FunctionCall[] = [];
|
||
|
||
constructor(
|
||
private constantPool: ConstantPool, private allocateSlot: () => number,
|
||
private allocatePureFunctionSlots: (numSlots: number) => number,
|
||
private definePipe:
|
||
(name: string, localName: string, slot: number, value: o.Expression) => void) {
|
||
super();
|
||
}
|
||
|
||
// AstMemoryEfficientTransformer
|
||
visitPipe(pipe: BindingPipe, context: any): AST {
|
||
// Allocate a slot to create the pipe
|
||
const slot = this.allocateSlot();
|
||
const slotPseudoLocal = `PIPE:${slot}`;
|
||
// Allocate one slot for the result plus one slot per pipe argument
|
||
const pureFunctionSlot = this.allocatePureFunctionSlots(2 + pipe.args.length);
|
||
const target = new PropertyRead(pipe.span, new ImplicitReceiver(pipe.span), slotPseudoLocal);
|
||
const {identifier, isVarLength} = pipeBindingCallInfo(pipe.args);
|
||
this.definePipe(pipe.name, slotPseudoLocal, slot, o.importExpr(identifier));
|
||
const args: AST[] = [pipe.exp, ...pipe.args];
|
||
const convertedArgs: AST[] =
|
||
isVarLength ? this.visitAll([new LiteralArray(pipe.span, args)]) : this.visitAll(args);
|
||
|
||
const pipeBindExpr = new FunctionCall(pipe.span, target, [
|
||
new LiteralPrimitive(pipe.span, slot),
|
||
new LiteralPrimitive(pipe.span, pureFunctionSlot),
|
||
...convertedArgs,
|
||
]);
|
||
this._pipeBindExprs.push(pipeBindExpr);
|
||
return pipeBindExpr;
|
||
}
|
||
|
||
updatePipeSlotOffsets(bindingSlots: number) {
|
||
this._pipeBindExprs.forEach((pipe: FunctionCall) => {
|
||
// update the slot offset arg (index 1) to account for binding slots
|
||
const slotOffset = pipe.args[1] as LiteralPrimitive;
|
||
(slotOffset.value as number) += bindingSlots;
|
||
});
|
||
}
|
||
|
||
visitLiteralArray(array: LiteralArray, context: any): AST {
|
||
return new BuiltinFunctionCall(array.span, this.visitAll(array.expressions), values => {
|
||
// If the literal has calculated (non-literal) elements transform it into
|
||
// calls to literal factories that compose the literal and will cache intermediate
|
||
// values. Otherwise, just return an literal array that contains the values.
|
||
const literal = o.literalArr(values);
|
||
return values.every(a => a.isConstant()) ?
|
||
this.constantPool.getConstLiteral(literal, true) :
|
||
getLiteralFactory(this.constantPool, literal, this.allocatePureFunctionSlots);
|
||
});
|
||
}
|
||
|
||
visitLiteralMap(map: LiteralMap, context: any): AST {
|
||
return new BuiltinFunctionCall(map.span, this.visitAll(map.values), values => {
|
||
// If the literal has calculated (non-literal) elements transform it into
|
||
// calls to literal factories that compose the literal and will cache intermediate
|
||
// values. Otherwise, just return an literal array that contains the values.
|
||
const literal = o.literalMap(values.map(
|
||
(value, index) => ({key: map.keys[index].key, value, quoted: map.keys[index].quoted})));
|
||
return values.every(a => a.isConstant()) ?
|
||
this.constantPool.getConstLiteral(literal, true) :
|
||
getLiteralFactory(this.constantPool, literal, this.allocatePureFunctionSlots);
|
||
});
|
||
}
|
||
}
|
||
|
||
// Pipes always have at least one parameter, the value they operate on
|
||
const pipeBindingIdentifiers = [R3.pipeBind1, R3.pipeBind2, R3.pipeBind3, R3.pipeBind4];
|
||
|
||
function pipeBindingCallInfo(args: o.Expression[]) {
|
||
const identifier = pipeBindingIdentifiers[args.length];
|
||
return {
|
||
identifier: identifier || R3.pipeBindV,
|
||
isVarLength: !identifier,
|
||
};
|
||
}
|
||
|
||
const pureFunctionIdentifiers = [
|
||
R3.pureFunction0, R3.pureFunction1, R3.pureFunction2, R3.pureFunction3, R3.pureFunction4,
|
||
R3.pureFunction5, R3.pureFunction6, R3.pureFunction7, R3.pureFunction8
|
||
];
|
||
|
||
function pureFunctionCallInfo(args: o.Expression[]) {
|
||
const identifier = pureFunctionIdentifiers[args.length];
|
||
return {
|
||
identifier: identifier || R3.pureFunctionV,
|
||
isVarLength: !identifier,
|
||
};
|
||
}
|
||
|
||
function instruction(
|
||
span: ParseSourceSpan | null, reference: o.ExternalReference,
|
||
params: o.Expression[]): o.Expression {
|
||
return o.importExpr(reference, null, span).callFn(params, span);
|
||
}
|
||
|
||
// e.g. x(2);
|
||
function generateNextContextExpr(relativeLevelDiff: number): o.Expression {
|
||
return o.importExpr(R3.nextContext)
|
||
.callFn(relativeLevelDiff > 1 ? [o.literal(relativeLevelDiff)] : []);
|
||
}
|
||
|
||
function getLiteralFactory(
|
||
constantPool: ConstantPool, literal: o.LiteralArrayExpr | o.LiteralMapExpr,
|
||
allocateSlots: (numSlots: number) => number): o.Expression {
|
||
const {literalFactory, literalFactoryArguments} = constantPool.getLiteralFactory(literal);
|
||
// Allocate 1 slot for the result plus 1 per argument
|
||
const startSlot = allocateSlots(1 + literalFactoryArguments.length);
|
||
literalFactoryArguments.length > 0 || error(`Expected arguments to a literal factory function`);
|
||
const {identifier, isVarLength} = pureFunctionCallInfo(literalFactoryArguments);
|
||
|
||
// Literal factories are pure functions that only need to be re-invoked when the parameters
|
||
// change.
|
||
const args = [
|
||
o.literal(startSlot),
|
||
literalFactory,
|
||
];
|
||
|
||
if (isVarLength) {
|
||
args.push(o.literalArr(literalFactoryArguments));
|
||
} else {
|
||
args.push(...literalFactoryArguments);
|
||
}
|
||
|
||
return o.importExpr(identifier).callFn(args);
|
||
}
|
||
|
||
/**
|
||
* Gets an array of literals that can be added to an expression
|
||
* to represent the name and namespace of an attribute. E.g.
|
||
* `:xlink:href` turns into `[AttributeMarker.NamespaceURI, 'xlink', 'href']`.
|
||
*
|
||
* @param name Name of the attribute, including the namespace.
|
||
*/
|
||
function getAttributeNameLiterals(name: string): o.LiteralExpr[] {
|
||
const [attributeNamespace, attributeName] = splitNsName(name);
|
||
const nameLiteral = o.literal(attributeName);
|
||
|
||
if (attributeNamespace) {
|
||
return [
|
||
o.literal(core.AttributeMarker.NamespaceURI), o.literal(attributeNamespace), nameLiteral
|
||
];
|
||
}
|
||
|
||
return [nameLiteral];
|
||
}
|
||
|
||
/**
|
||
* Function which is executed whenever a variable is referenced for the first time in a given
|
||
* scope.
|
||
*
|
||
* It is expected that the function creates the `const localName = expression`; statement.
|
||
*/
|
||
export type DeclareLocalVarCallback = (scope: BindingScope, relativeLevel: number) => o.Statement[];
|
||
|
||
/** The prefix used to get a shared context in BindingScope's map. */
|
||
const SHARED_CONTEXT_KEY = '$$shared_ctx$$';
|
||
|
||
/**
|
||
* This is used when one refers to variable such as: 'let abc = nextContext(2).$implicit`.
|
||
* - key to the map is the string literal `"abc"`.
|
||
* - value `retrievalLevel` is the level from which this value can be retrieved, which is 2 levels
|
||
* up in example.
|
||
* - value `lhs` is the left hand side which is an AST representing `abc`.
|
||
* - value `declareLocalCallback` is a callback that is invoked when declaring the local.
|
||
* - value `declare` is true if this value needs to be declared.
|
||
* - value `localRef` is true if we are storing a local reference
|
||
* - value `priority` dictates the sorting priority of this var declaration compared
|
||
* to other var declarations on the same retrieval level. For example, if there is a
|
||
* context variable and a local ref accessing the same parent view, the context var
|
||
* declaration should always come before the local ref declaration.
|
||
*/
|
||
type BindingData = {
|
||
retrievalLevel: number; lhs: o.ReadVarExpr; declareLocalCallback?: DeclareLocalVarCallback;
|
||
declare: boolean;
|
||
priority: number;
|
||
localRef: boolean;
|
||
};
|
||
|
||
/**
|
||
* The sorting priority of a local variable declaration. Higher numbers
|
||
* mean the declaration will appear first in the generated code.
|
||
*/
|
||
const enum DeclarationPriority { DEFAULT = 0, CONTEXT = 1, SHARED_CONTEXT = 2 }
|
||
|
||
export class BindingScope implements LocalResolver {
|
||
/** Keeps a map from local variables to their BindingData. */
|
||
private map = new Map<string, BindingData>();
|
||
private referenceNameIndex = 0;
|
||
private restoreViewVariable: o.ReadVarExpr|null = null;
|
||
private static _ROOT_SCOPE: BindingScope;
|
||
|
||
static get ROOT_SCOPE(): BindingScope {
|
||
if (!BindingScope._ROOT_SCOPE) {
|
||
BindingScope._ROOT_SCOPE = new BindingScope().set(0, '$event', o.variable('$event'));
|
||
}
|
||
return BindingScope._ROOT_SCOPE;
|
||
}
|
||
|
||
private constructor(public bindingLevel: number = 0, private parent: BindingScope|null = null) {}
|
||
|
||
get(name: string): o.Expression|null {
|
||
let current: BindingScope|null = this;
|
||
while (current) {
|
||
let value = current.map.get(name);
|
||
if (value != null) {
|
||
if (current !== this) {
|
||
// make a local copy and reset the `declare` state
|
||
value = {
|
||
retrievalLevel: value.retrievalLevel,
|
||
lhs: value.lhs,
|
||
declareLocalCallback: value.declareLocalCallback,
|
||
declare: false,
|
||
priority: value.priority,
|
||
localRef: value.localRef
|
||
};
|
||
|
||
// Cache the value locally.
|
||
this.map.set(name, value);
|
||
// Possibly generate a shared context var
|
||
this.maybeGenerateSharedContextVar(value);
|
||
this.maybeRestoreView(value.retrievalLevel, value.localRef);
|
||
}
|
||
|
||
if (value.declareLocalCallback && !value.declare) {
|
||
value.declare = true;
|
||
}
|
||
return value.lhs;
|
||
}
|
||
current = current.parent;
|
||
}
|
||
|
||
// If we get to this point, we are looking for a property on the top level component
|
||
// - If level === 0, we are on the top and don't need to re-declare `ctx`.
|
||
// - If level > 0, we are in an embedded view. We need to retrieve the name of the
|
||
// local var we used to store the component context, e.g. const $comp$ = x();
|
||
return this.bindingLevel === 0 ? null : this.getComponentProperty(name);
|
||
}
|
||
|
||
/**
|
||
* Create a local variable for later reference.
|
||
*
|
||
* @param retrievalLevel The level from which this value can be retrieved
|
||
* @param name Name of the variable.
|
||
* @param lhs AST representing the left hand side of the `let lhs = rhs;`.
|
||
* @param priority The sorting priority of this var
|
||
* @param declareLocalCallback The callback to invoke when declaring this local var
|
||
* @param localRef Whether or not this is a local ref
|
||
*/
|
||
set(retrievalLevel: number, name: string, lhs: o.ReadVarExpr,
|
||
priority: number = DeclarationPriority.DEFAULT,
|
||
declareLocalCallback?: DeclareLocalVarCallback, localRef?: true): BindingScope {
|
||
if (this.map.has(name)) {
|
||
if (localRef) {
|
||
// Do not throw an error if it's a local ref and do not update existing value,
|
||
// so the first defined ref is always returned.
|
||
return this;
|
||
}
|
||
error(`The name ${name} is already defined in scope to be ${this.map.get(name)}`);
|
||
}
|
||
this.map.set(name, {
|
||
retrievalLevel: retrievalLevel,
|
||
lhs: lhs,
|
||
declare: false,
|
||
declareLocalCallback: declareLocalCallback,
|
||
priority: priority,
|
||
localRef: localRef || false
|
||
});
|
||
return this;
|
||
}
|
||
|
||
getLocal(name: string): (o.Expression|null) { return this.get(name); }
|
||
|
||
nestedScope(level: number): BindingScope {
|
||
const newScope = new BindingScope(level, this);
|
||
if (level > 0) newScope.generateSharedContextVar(0);
|
||
return newScope;
|
||
}
|
||
|
||
getSharedContextName(retrievalLevel: number): o.ReadVarExpr|null {
|
||
const sharedCtxObj = this.map.get(SHARED_CONTEXT_KEY + retrievalLevel);
|
||
return sharedCtxObj && sharedCtxObj.declare ? sharedCtxObj.lhs : null;
|
||
}
|
||
|
||
maybeGenerateSharedContextVar(value: BindingData) {
|
||
if (value.priority === DeclarationPriority.CONTEXT &&
|
||
value.retrievalLevel < this.bindingLevel) {
|
||
const sharedCtxObj = this.map.get(SHARED_CONTEXT_KEY + value.retrievalLevel);
|
||
if (sharedCtxObj) {
|
||
sharedCtxObj.declare = true;
|
||
} else {
|
||
this.generateSharedContextVar(value.retrievalLevel);
|
||
}
|
||
}
|
||
}
|
||
|
||
generateSharedContextVar(retrievalLevel: number) {
|
||
const lhs = o.variable(CONTEXT_NAME + this.freshReferenceName());
|
||
this.map.set(SHARED_CONTEXT_KEY + retrievalLevel, {
|
||
retrievalLevel: retrievalLevel,
|
||
lhs: lhs,
|
||
declareLocalCallback: (scope: BindingScope, relativeLevel: number) => {
|
||
// const ctx_r0 = nextContext(2);
|
||
return [lhs.set(generateNextContextExpr(relativeLevel)).toConstDecl()];
|
||
},
|
||
declare: false,
|
||
priority: DeclarationPriority.SHARED_CONTEXT,
|
||
localRef: false
|
||
});
|
||
}
|
||
|
||
getComponentProperty(name: string): o.Expression {
|
||
const componentValue = this.map.get(SHARED_CONTEXT_KEY + 0) !;
|
||
componentValue.declare = true;
|
||
this.maybeRestoreView(0, false);
|
||
return componentValue.lhs.prop(name);
|
||
}
|
||
|
||
maybeRestoreView(retrievalLevel: number, localRefLookup: boolean) {
|
||
// We want to restore the current view in listener fns if:
|
||
// 1 - we are accessing a value in a parent view, which requires walking the view tree rather
|
||
// than using the ctx arg. In this case, the retrieval and binding level will be different.
|
||
// 2 - we are looking up a local ref, which requires restoring the view where the local
|
||
// ref is stored
|
||
if (this.isListenerScope() && (retrievalLevel < this.bindingLevel || localRefLookup)) {
|
||
if (!this.parent !.restoreViewVariable) {
|
||
// parent saves variable to generate a shared `const $s$ = getCurrentView();` instruction
|
||
this.parent !.restoreViewVariable = o.variable(this.parent !.freshReferenceName());
|
||
}
|
||
this.restoreViewVariable = this.parent !.restoreViewVariable;
|
||
}
|
||
}
|
||
|
||
restoreViewStatement(): o.Statement[] {
|
||
// restoreView($state$);
|
||
return this.restoreViewVariable ?
|
||
[instruction(null, R3.restoreView, [this.restoreViewVariable]).toStmt()] :
|
||
[];
|
||
}
|
||
|
||
viewSnapshotStatements(): o.Statement[] {
|
||
// const $state$ = getCurrentView();
|
||
const getCurrentViewInstruction = instruction(null, R3.getCurrentView, []);
|
||
return this.restoreViewVariable ?
|
||
[this.restoreViewVariable.set(getCurrentViewInstruction).toConstDecl()] :
|
||
[];
|
||
}
|
||
|
||
isListenerScope() { return this.parent && this.parent.bindingLevel === this.bindingLevel; }
|
||
|
||
variableDeclarations(): o.Statement[] {
|
||
let currentContextLevel = 0;
|
||
return Array.from(this.map.values())
|
||
.filter(value => value.declare)
|
||
.sort((a, b) => b.retrievalLevel - a.retrievalLevel || b.priority - a.priority)
|
||
.reduce((stmts: o.Statement[], value: BindingData) => {
|
||
const levelDiff = this.bindingLevel - value.retrievalLevel;
|
||
const currStmts = value.declareLocalCallback !(this, levelDiff - currentContextLevel);
|
||
currentContextLevel = levelDiff;
|
||
return stmts.concat(currStmts);
|
||
}, []) as o.Statement[];
|
||
}
|
||
|
||
|
||
freshReferenceName(): string {
|
||
let current: BindingScope = this;
|
||
// Find the top scope as it maintains the global reference count
|
||
while (current.parent) current = current.parent;
|
||
const ref = `${REFERENCE_PREFIX}${current.referenceNameIndex++}`;
|
||
return ref;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Creates a `CssSelector` given a tag name and a map of attributes
|
||
*/
|
||
function createCssSelector(tag: string, attributes: {[name: string]: string}): CssSelector {
|
||
const cssSelector = new CssSelector();
|
||
|
||
cssSelector.setElement(tag);
|
||
|
||
Object.getOwnPropertyNames(attributes).forEach((name) => {
|
||
const value = attributes[name];
|
||
|
||
cssSelector.addAttribute(name, value);
|
||
if (name.toLowerCase() === 'class') {
|
||
const classes = value.trim().split(/\s+/);
|
||
classes.forEach(className => cssSelector.addClassName(className));
|
||
}
|
||
});
|
||
|
||
return cssSelector;
|
||
}
|
||
|
||
/**
|
||
* Creates an array of expressions out of an `ngProjectAs` attributes
|
||
* which can be added to the instruction parameters.
|
||
*/
|
||
function getNgProjectAsLiteral(attribute: t.TextAttribute): o.Expression[] {
|
||
// Parse the attribute value into a CssSelectorList. Note that we only take the
|
||
// first selector, because we don't support multiple selectors in ngProjectAs.
|
||
const parsedR3Selector = core.parseSelectorToR3Selector(attribute.value)[0];
|
||
return [o.literal(core.AttributeMarker.ProjectAs), asLiteral(parsedR3Selector)];
|
||
}
|
||
|
||
function interpolate(args: o.Expression[]): o.Expression {
|
||
args = args.slice(1); // Ignore the length prefix added for render2
|
||
switch (args.length) {
|
||
case 3:
|
||
return o.importExpr(R3.interpolation1).callFn(args);
|
||
case 5:
|
||
return o.importExpr(R3.interpolation2).callFn(args);
|
||
case 7:
|
||
return o.importExpr(R3.interpolation3).callFn(args);
|
||
case 9:
|
||
return o.importExpr(R3.interpolation4).callFn(args);
|
||
case 11:
|
||
return o.importExpr(R3.interpolation5).callFn(args);
|
||
case 13:
|
||
return o.importExpr(R3.interpolation6).callFn(args);
|
||
case 15:
|
||
return o.importExpr(R3.interpolation7).callFn(args);
|
||
case 17:
|
||
return o.importExpr(R3.interpolation8).callFn(args);
|
||
}
|
||
(args.length >= 19 && args.length % 2 == 1) ||
|
||
error(`Invalid interpolation argument length ${args.length}`);
|
||
return o.importExpr(R3.interpolationV).callFn([o.literalArr(args)]);
|
||
}
|
||
|
||
/**
|
||
* Gets the instruction to generate for an interpolated property
|
||
* @param interpolation An Interpolation AST
|
||
*/
|
||
function getPropertyInterpolationExpression(interpolation: Interpolation) {
|
||
switch (getInterpolationArgsLength(interpolation)) {
|
||
case 1:
|
||
return R3.propertyInterpolate;
|
||
case 3:
|
||
return R3.propertyInterpolate1;
|
||
case 5:
|
||
return R3.propertyInterpolate2;
|
||
case 7:
|
||
return R3.propertyInterpolate3;
|
||
case 9:
|
||
return R3.propertyInterpolate4;
|
||
case 11:
|
||
return R3.propertyInterpolate5;
|
||
case 13:
|
||
return R3.propertyInterpolate6;
|
||
case 15:
|
||
return R3.propertyInterpolate7;
|
||
case 17:
|
||
return R3.propertyInterpolate8;
|
||
default:
|
||
return R3.propertyInterpolateV;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Gets the instruction to generate for an interpolated attribute
|
||
* @param interpolation An Interpolation AST
|
||
*/
|
||
function getAttributeInterpolationExpression(interpolation: Interpolation) {
|
||
switch (getInterpolationArgsLength(interpolation)) {
|
||
case 3:
|
||
return R3.attributeInterpolate1;
|
||
case 5:
|
||
return R3.attributeInterpolate2;
|
||
case 7:
|
||
return R3.attributeInterpolate3;
|
||
case 9:
|
||
return R3.attributeInterpolate4;
|
||
case 11:
|
||
return R3.attributeInterpolate5;
|
||
case 13:
|
||
return R3.attributeInterpolate6;
|
||
case 15:
|
||
return R3.attributeInterpolate7;
|
||
case 17:
|
||
return R3.attributeInterpolate8;
|
||
default:
|
||
return R3.attributeInterpolateV;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Gets the instruction to generate for interpolated text.
|
||
* @param interpolation An Interpolation AST
|
||
*/
|
||
function getTextInterpolationExpression(interpolation: Interpolation): o.ExternalReference {
|
||
switch (getInterpolationArgsLength(interpolation)) {
|
||
case 1:
|
||
return R3.textInterpolate;
|
||
case 3:
|
||
return R3.textInterpolate1;
|
||
case 5:
|
||
return R3.textInterpolate2;
|
||
case 7:
|
||
return R3.textInterpolate3;
|
||
case 9:
|
||
return R3.textInterpolate4;
|
||
case 11:
|
||
return R3.textInterpolate5;
|
||
case 13:
|
||
return R3.textInterpolate6;
|
||
case 15:
|
||
return R3.textInterpolate7;
|
||
case 17:
|
||
return R3.textInterpolate8;
|
||
default:
|
||
return R3.textInterpolateV;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Gets the number of arguments expected to be passed to a generated instruction in the case of
|
||
* interpolation instructions.
|
||
* @param interpolation An interpolation ast
|
||
*/
|
||
function getInterpolationArgsLength(interpolation: Interpolation) {
|
||
const {expressions, strings} = interpolation;
|
||
if (expressions.length === 1 && strings.length === 2 && strings[0] === '' && strings[1] === '') {
|
||
// If the interpolation has one interpolated value, but the prefix and suffix are both empty
|
||
// strings, we only pass one argument, to a special instruction like `propertyInterpolate` or
|
||
// `textInterpolate`.
|
||
return 1;
|
||
} else {
|
||
return expressions.length + strings.length;
|
||
}
|
||
}
|
||
/**
|
||
* Options that can be used to modify how a template is parsed by `parseTemplate()`.
|
||
*/
|
||
export interface ParseTemplateOptions {
|
||
/**
|
||
* Include whitespace nodes in the parsed output.
|
||
*/
|
||
preserveWhitespaces?: boolean;
|
||
/**
|
||
* How to parse interpolation markers.
|
||
*/
|
||
interpolationConfig?: InterpolationConfig;
|
||
/**
|
||
* The start and end point of the text to parse within the `source` string.
|
||
* The entire `source` string is parsed if this is not provided.
|
||
* */
|
||
range?: LexerRange;
|
||
/**
|
||
* If this text is stored in a JavaScript string, then we have to deal with escape sequences.
|
||
*
|
||
* **Example 1:**
|
||
*
|
||
* ```
|
||
* "abc\"def\nghi"
|
||
* ```
|
||
*
|
||
* - The `\"` must be converted to `"`.
|
||
* - The `\n` must be converted to a new line character in a token,
|
||
* but it should not increment the current line for source mapping.
|
||
*
|
||
* **Example 2:**
|
||
*
|
||
* ```
|
||
* "abc\
|
||
* def"
|
||
* ```
|
||
*
|
||
* The line continuation (`\` followed by a newline) should be removed from a token
|
||
* but the new line should increment the current line for source mapping.
|
||
*/
|
||
escapedString?: boolean;
|
||
}
|
||
|
||
/**
|
||
* Parse a template into render3 `Node`s and additional metadata, with no other dependencies.
|
||
*
|
||
* @param template text of the template to parse
|
||
* @param templateUrl URL to use for source mapping of the parsed template
|
||
* @param options options to modify how the template is parsed
|
||
*/
|
||
export function parseTemplate(
|
||
template: string, templateUrl: string, options: ParseTemplateOptions = {}):
|
||
{errors?: ParseError[], nodes: t.Node[], styleUrls: string[], styles: string[]} {
|
||
const {interpolationConfig, preserveWhitespaces} = options;
|
||
const bindingParser = makeBindingParser(interpolationConfig);
|
||
const htmlParser = new HtmlParser();
|
||
const parseResult = htmlParser.parse(
|
||
template, templateUrl,
|
||
{...options, tokenizeExpansionForms: true, leadingTriviaChars: LEADING_TRIVIA_CHARS});
|
||
|
||
if (parseResult.errors && parseResult.errors.length > 0) {
|
||
return {errors: parseResult.errors, nodes: [], styleUrls: [], styles: []};
|
||
}
|
||
|
||
let rootNodes: html.Node[] = parseResult.rootNodes;
|
||
|
||
// process i18n meta information (scan attributes, generate ids)
|
||
// before we run whitespace removal process, because existing i18n
|
||
// extraction process (ng xi18n) relies on a raw content to generate
|
||
// message ids
|
||
rootNodes =
|
||
html.visitAll(new I18nMetaVisitor(interpolationConfig, !preserveWhitespaces), rootNodes);
|
||
|
||
if (!preserveWhitespaces) {
|
||
rootNodes = html.visitAll(new WhitespaceVisitor(), rootNodes);
|
||
|
||
// run i18n meta visitor again in case we remove whitespaces, because
|
||
// that might affect generated i18n message content. During this pass
|
||
// i18n IDs generated at the first pass will be preserved, so we can mimic
|
||
// existing extraction process (ng xi18n)
|
||
rootNodes = html.visitAll(
|
||
new I18nMetaVisitor(interpolationConfig, /* keepI18nAttrs */ false), rootNodes);
|
||
}
|
||
|
||
const {nodes, errors, styleUrls, styles} = htmlAstToRender3Ast(rootNodes, bindingParser);
|
||
if (errors && errors.length > 0) {
|
||
return {errors, nodes: [], styleUrls: [], styles: []};
|
||
}
|
||
|
||
return {nodes, styleUrls, styles};
|
||
}
|
||
|
||
/**
|
||
* Construct a `BindingParser` with a default configuration.
|
||
*/
|
||
export function makeBindingParser(
|
||
interpolationConfig: InterpolationConfig = DEFAULT_INTERPOLATION_CONFIG): BindingParser {
|
||
return new BindingParser(
|
||
new Parser(new Lexer()), interpolationConfig, new DomElementSchemaRegistry(), null, []);
|
||
}
|
||
|
||
export function resolveSanitizationFn(context: core.SecurityContext, isAttribute?: boolean) {
|
||
switch (context) {
|
||
case core.SecurityContext.HTML:
|
||
return o.importExpr(R3.sanitizeHtml);
|
||
case core.SecurityContext.SCRIPT:
|
||
return o.importExpr(R3.sanitizeScript);
|
||
case core.SecurityContext.STYLE:
|
||
// the compiler does not fill in an instruction for [style.prop?] binding
|
||
// values because the style algorithm knows internally what props are subject
|
||
// to sanitization (only [attr.style] values are explicitly sanitized)
|
||
return isAttribute ? o.importExpr(R3.sanitizeStyle) : null;
|
||
case core.SecurityContext.URL:
|
||
return o.importExpr(R3.sanitizeUrl);
|
||
case core.SecurityContext.RESOURCE_URL:
|
||
return o.importExpr(R3.sanitizeResourceUrl);
|
||
default:
|
||
return null;
|
||
}
|
||
}
|
||
|
||
function isSingleElementTemplate(children: t.Node[]): children is[t.Element] {
|
||
return children.length === 1 && children[0] instanceof t.Element;
|
||
}
|
||
|
||
function isTextNode(node: t.Node): boolean {
|
||
return node instanceof t.Text || node instanceof t.BoundText || node instanceof t.Icu;
|
||
}
|
||
|
||
function hasTextChildrenOnly(children: t.Node[]): boolean {
|
||
return children.every(isTextNode);
|
||
}
|