TypeScript compiler.parseHostBindings函数代码示例

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本文整理汇总了TypeScript中@angular/compiler.parseHostBindings函数的典型用法代码示例。如果您正苦于以下问题：TypeScript parseHostBindings函数的具体用法？TypeScript parseHostBindings怎么用？TypeScript parseHostBindings使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了parseHostBindings函数的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的TypeScript代码示例。

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};
}

开发者ID:DeepanParikh，项目名称:angular，代码行数:27，代码来源:directive.ts

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};
}

开发者ID:KaneFreeman，项目名称:angular，代码行数:83，代码来源:directive.ts

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;
}

开发者ID:matsko，项目名称:angular，代码行数:93，代码来源:directive.ts

注：本文中的@angular/compiler.parseHostBindings函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。