本文整理匯總了TypeScript中@angular/compiler.parseHostBindings函數的典型用法代碼示例。如果您正苦於以下問題：TypeScript parseHostBindings函數的具體用法？TypeScript parseHostBindings怎麽用？TypeScript parseHostBindings使用的例子？那麽, 這裏精選的函數代碼示例或許可以為您提供幫助。
在下文中一共展示了parseHostBindings函數的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: extractHostBindings
function extractHostBindings(metadata: Directive, propMetadata: {[key: string]: any[]}): {
attributes: StringMap,
listeners: StringMap,
properties: StringMap,
} {
// First parse the declarations from the metadata.
const {attributes, listeners, properties, animations} = parseHostBindings(metadata.host || {});
if (Object.keys(animations).length > 0) {
throw new Error(`Animation bindings are as-of-yet unsupported in Ivy`);
}
// Next, loop over the properties of the object, looking for @HostBinding and @HostListener.
for (const field in propMetadata) {
if (propMetadata.hasOwnProperty(field)) {
propMetadata[field].forEach(ann => {
if (isHostBinding(ann)) {
properties[ann.hostPropertyName || field] = field;
} else if (isHostListener(ann)) {
listeners[ann.eventName || field] = `${field}(${(ann.args || []).join(',')})`;
}
});
}
}
return {attributes, listeners, properties};
}示例2: extractHostBindings
function extractHostBindings(
metadata: Map<string, ts.Expression>, members: ClassMember[], reflector: ReflectionHost,
checker: ts.TypeChecker, coreModule: string | undefined): {
attributes: StringMap,
listeners: StringMap,
properties: StringMap,
} {
let hostMetadata: StringMap = {};
if (metadata.has('host')) {
const expr = metadata.get('host') !;
const hostMetaMap = staticallyResolve(expr, reflector, checker);
if (!(hostMetaMap instanceof Map)) {
throw new FatalDiagnosticError(
ErrorCode.DECORATOR_ARG_NOT_LITERAL, expr, `Decorator host metadata must be an object`);
}
hostMetaMap.forEach((value, key) => {
if (typeof value !== 'string' || typeof key !== 'string') {
throw new Error(`Decorator host metadata must be a string -> string object, got ${value}`);
}
hostMetadata[key] = value;
});
}
const {attributes, listeners, properties, animations} = parseHostBindings(hostMetadata);
filterToMembersWithDecorator(members, 'HostBinding', coreModule)
.forEach(({member, decorators}) => {
decorators.forEach(decorator => {
let hostPropertyName: string = member.name;
if (decorator.args !== null && decorator.args.length > 0) {
if (decorator.args.length !== 1) {
throw new Error(`@HostBinding() can have at most one argument`);
}
const resolved = staticallyResolve(decorator.args[0], reflector, checker);
if (typeof resolved !== 'string') {
throw new Error(`@HostBinding()'s argument must be a string`);
}
hostPropertyName = resolved;
}
properties[hostPropertyName] = member.name;
});
});
filterToMembersWithDecorator(members, 'HostListener', coreModule)
.forEach(({member, decorators}) => {
decorators.forEach(decorator => {
let eventName: string = member.name;
let args: string[] = [];
if (decorator.args !== null && decorator.args.length > 0) {
if (decorator.args.length > 2) {
throw new FatalDiagnosticError(
ErrorCode.DECORATOR_ARITY_WRONG, decorator.args[2],
`@HostListener() can have at most two arguments`);
}
const resolved = staticallyResolve(decorator.args[0], reflector, checker);
if (typeof resolved !== 'string') {
throw new FatalDiagnosticError(
ErrorCode.VALUE_HAS_WRONG_TYPE, decorator.args[0],
`@HostListener()'s event name argument must be a string`);
}
eventName = resolved;
if (decorator.args.length === 2) {
const resolvedArgs = staticallyResolve(decorator.args[1], reflector, checker);
if (!isStringArrayOrDie(resolvedArgs, '@HostListener.args')) {
throw new FatalDiagnosticError(
ErrorCode.VALUE_HAS_WRONG_TYPE, decorator.args[1],
`@HostListener second argument must be a string array`);
}
args = resolvedArgs;
}
}
listeners[eventName] = `${member.name}(${args.join(',')})`;
});
});
return {attributes, properties, listeners};
}示例3: extractHostBindings
function extractHostBindings(
metadata: Map<string, ts.Expression>, members: ClassMember[], evaluator: PartialEvaluator,
coreModule: string | undefined): {
attributes: StringMap,
listeners: StringMap,
properties: StringMap,
} {
let hostMetadata: StringMap = {};
if (metadata.has('host')) {
const expr = metadata.get('host') !;
const hostMetaMap = evaluator.evaluate(expr);
if (!(hostMetaMap instanceof Map)) {
throw new FatalDiagnosticError(
ErrorCode.DECORATOR_ARG_NOT_LITERAL, expr, `Decorator host metadata must be an object`);
}
hostMetaMap.forEach((value, key) => {
if (typeof value !== 'string' || typeof key !== 'string') {
throw new Error(`Decorator host metadata must be a string -> string object, got ${value}`);
}
hostMetadata[key] = value;
});
}
const bindings = parseHostBindings(hostMetadata);
// TODO: create and provide proper sourceSpan to make error message more descriptive (FW-995)
const errors = verifyHostBindings(bindings, /* sourceSpan */ null !);
if (errors.length > 0) {
throw new FatalDiagnosticError(
// TODO: provide more granular diagnostic and output specific host expression that triggered
// an error instead of the whole host object
ErrorCode.HOST_BINDING_PARSE_ERROR, metadata.get('host') !,
errors.map((error: ParseError) => error.msg).join('\n'));
}
filterToMembersWithDecorator(members, 'HostBinding', coreModule)
.forEach(({member, decorators}) => {
decorators.forEach(decorator => {
let hostPropertyName: string = member.name;
if (decorator.args !== null && decorator.args.length > 0) {
if (decorator.args.length !== 1) {
throw new Error(`@HostBinding() can have at most one argument`);
}
const resolved = evaluator.evaluate(decorator.args[0]);
if (typeof resolved !== 'string') {
throw new Error(`@HostBinding()'s argument must be a string`);
}
hostPropertyName = resolved;
}
bindings.properties[hostPropertyName] = member.name;
});
});
filterToMembersWithDecorator(members, 'HostListener', coreModule)
.forEach(({member, decorators}) => {
decorators.forEach(decorator => {
let eventName: string = member.name;
let args: string[] = [];
if (decorator.args !== null && decorator.args.length > 0) {
if (decorator.args.length > 2) {
throw new FatalDiagnosticError(
ErrorCode.DECORATOR_ARITY_WRONG, decorator.args[2],
`@HostListener() can have at most two arguments`);
}
const resolved = evaluator.evaluate(decorator.args[0]);
if (typeof resolved !== 'string') {
throw new FatalDiagnosticError(
ErrorCode.VALUE_HAS_WRONG_TYPE, decorator.args[0],
`@HostListener()'s event name argument must be a string`);
}
eventName = resolved;
if (decorator.args.length === 2) {
const resolvedArgs = evaluator.evaluate(decorator.args[1]);
if (!isStringArrayOrDie(resolvedArgs, '@HostListener.args')) {
throw new FatalDiagnosticError(
ErrorCode.VALUE_HAS_WRONG_TYPE, decorator.args[1],
`@HostListener second argument must be a string array`);
}
args = resolvedArgs;
}
}
bindings.listeners[eventName] = `${member.name}(${args.join(',')})`;
});
});
return bindings;
}