@angular/core
Version:
Angular - the core framework
202 lines • 27.2 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { WrappedValue } from '../change_detection/change_detection_util';
import { setInjectImplementation } from '../di/inject_switch';
import { getFactoryDef } from './definition_factory';
import { setIncludeViewProviders } from './di';
import { RuntimeError } from './error_code';
import { store, ɵɵdirectiveInject } from './instructions/all';
import { HEADER_OFFSET, TVIEW } from './interfaces/view';
import { pureFunction1Internal, pureFunction2Internal, pureFunction3Internal, pureFunction4Internal, pureFunctionVInternal } from './pure_function';
import { getBindingIndex, getBindingRoot, getLView, getTView } from './state';
import { NO_CHANGE } from './tokens';
import { load } from './util/view_utils';
/**
* Create a pipe.
*
* @param index Pipe index where the pipe will be stored.
* @param pipeName The name of the pipe
* @returns T the instance of the pipe.
*
* @codeGenApi
*/
export function ɵɵpipe(index, pipeName) {
const tView = getTView();
let pipeDef;
const adjustedIndex = index + HEADER_OFFSET;
if (tView.firstCreatePass) {
pipeDef = getPipeDef(pipeName, tView.pipeRegistry);
tView.data[adjustedIndex] = pipeDef;
if (pipeDef.onDestroy) {
(tView.destroyHooks || (tView.destroyHooks = [])).push(adjustedIndex, pipeDef.onDestroy);
}
}
else {
pipeDef = tView.data[adjustedIndex];
}
const pipeFactory = pipeDef.factory || (pipeDef.factory = getFactoryDef(pipeDef.type, true));
const previousInjectImplementation = setInjectImplementation(ɵɵdirectiveInject);
try {
// DI for pipes is supposed to behave like directives when placed on a component
// host node, which means that we have to disable access to `viewProviders`.
const previousIncludeViewProviders = setIncludeViewProviders(false);
const pipeInstance = pipeFactory();
setIncludeViewProviders(previousIncludeViewProviders);
store(tView, getLView(), adjustedIndex, pipeInstance);
return pipeInstance;
}
finally {
// we have to restore the injector implementation in finally, just in case the creation of the
// pipe throws an error.
setInjectImplementation(previousInjectImplementation);
}
}
/**
* Searches the pipe registry for a pipe with the given name. If one is found,
* returns the pipe. Otherwise, an error is thrown because the pipe cannot be resolved.
*
* @param name Name of pipe to resolve
* @param registry Full list of available pipes
* @returns Matching PipeDef
*/
function getPipeDef(name, registry) {
if (registry) {
for (let i = registry.length - 1; i >= 0; i--) {
const pipeDef = registry[i];
if (name === pipeDef.name) {
return pipeDef;
}
}
}
throw new RuntimeError("302" /* PIPE_NOT_FOUND */, `The pipe '${name}' could not be found!`);
}
/**
* Invokes a pipe with 1 arguments.
*
* This instruction acts as a guard to {@link PipeTransform#transform} invoking
* the pipe only when an input to the pipe changes.
*
* @param index Pipe index where the pipe was stored on creation.
* @param slotOffset the offset in the reserved slot space
* @param v1 1st argument to {@link PipeTransform#transform}.
*
* @codeGenApi
*/
export function ɵɵpipeBind1(index, slotOffset, v1) {
const adjustedIndex = index + HEADER_OFFSET;
const lView = getLView();
const pipeInstance = load(lView, adjustedIndex);
return unwrapValue(lView, isPure(lView, adjustedIndex) ?
pureFunction1Internal(lView, getBindingRoot(), slotOffset, pipeInstance.transform, v1, pipeInstance) :
pipeInstance.transform(v1));
}
/**
* Invokes a pipe with 2 arguments.
*
* This instruction acts as a guard to {@link PipeTransform#transform} invoking
* the pipe only when an input to the pipe changes.
*
* @param index Pipe index where the pipe was stored on creation.
* @param slotOffset the offset in the reserved slot space
* @param v1 1st argument to {@link PipeTransform#transform}.
* @param v2 2nd argument to {@link PipeTransform#transform}.
*
* @codeGenApi
*/
export function ɵɵpipeBind2(index, slotOffset, v1, v2) {
const adjustedIndex = index + HEADER_OFFSET;
const lView = getLView();
const pipeInstance = load(lView, adjustedIndex);
return unwrapValue(lView, isPure(lView, adjustedIndex) ?
pureFunction2Internal(lView, getBindingRoot(), slotOffset, pipeInstance.transform, v1, v2, pipeInstance) :
pipeInstance.transform(v1, v2));
}
/**
* Invokes a pipe with 3 arguments.
*
* This instruction acts as a guard to {@link PipeTransform#transform} invoking
* the pipe only when an input to the pipe changes.
*
* @param index Pipe index where the pipe was stored on creation.
* @param slotOffset the offset in the reserved slot space
* @param v1 1st argument to {@link PipeTransform#transform}.
* @param v2 2nd argument to {@link PipeTransform#transform}.
* @param v3 4rd argument to {@link PipeTransform#transform}.
*
* @codeGenApi
*/
export function ɵɵpipeBind3(index, slotOffset, v1, v2, v3) {
const adjustedIndex = index + HEADER_OFFSET;
const lView = getLView();
const pipeInstance = load(lView, adjustedIndex);
return unwrapValue(lView, isPure(lView, adjustedIndex) ? pureFunction3Internal(lView, getBindingRoot(), slotOffset, pipeInstance.transform, v1, v2, v3, pipeInstance) :
pipeInstance.transform(v1, v2, v3));
}
/**
* Invokes a pipe with 4 arguments.
*
* This instruction acts as a guard to {@link PipeTransform#transform} invoking
* the pipe only when an input to the pipe changes.
*
* @param index Pipe index where the pipe was stored on creation.
* @param slotOffset the offset in the reserved slot space
* @param v1 1st argument to {@link PipeTransform#transform}.
* @param v2 2nd argument to {@link PipeTransform#transform}.
* @param v3 3rd argument to {@link PipeTransform#transform}.
* @param v4 4th argument to {@link PipeTransform#transform}.
*
* @codeGenApi
*/
export function ɵɵpipeBind4(index, slotOffset, v1, v2, v3, v4) {
const adjustedIndex = index + HEADER_OFFSET;
const lView = getLView();
const pipeInstance = load(lView, adjustedIndex);
return unwrapValue(lView, isPure(lView, adjustedIndex) ? pureFunction4Internal(lView, getBindingRoot(), slotOffset, pipeInstance.transform, v1, v2, v3, v4, pipeInstance) :
pipeInstance.transform(v1, v2, v3, v4));
}
/**
* Invokes a pipe with variable number of arguments.
*
* This instruction acts as a guard to {@link PipeTransform#transform} invoking
* the pipe only when an input to the pipe changes.
*
* @param index Pipe index where the pipe was stored on creation.
* @param slotOffset the offset in the reserved slot space
* @param values Array of arguments to pass to {@link PipeTransform#transform} method.
*
* @codeGenApi
*/
export function ɵɵpipeBindV(index, slotOffset, values) {
const adjustedIndex = index + HEADER_OFFSET;
const lView = getLView();
const pipeInstance = load(lView, adjustedIndex);
return unwrapValue(lView, isPure(lView, adjustedIndex) ?
pureFunctionVInternal(lView, getBindingRoot(), slotOffset, pipeInstance.transform, values, pipeInstance) :
pipeInstance.transform.apply(pipeInstance, values));
}
function isPure(lView, index) {
return lView[TVIEW].data[index].pure;
}
/**
* Unwrap the output of a pipe transformation.
* In order to trick change detection into considering that the new value is always different from
* the old one, the old value is overwritten by NO_CHANGE.
*
* @param newValue the pipe transformation output.
*/
function unwrapValue(lView, newValue) {
if (WrappedValue.isWrapped(newValue)) {
newValue = WrappedValue.unwrap(newValue);
// The NO_CHANGE value needs to be written at the index where the impacted binding value is
// stored
const bindingToInvalidateIdx = getBindingIndex();
lView[bindingToInvalidateIdx] = NO_CHANGE;
}
return newValue;
}
//# 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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {WrappedValue} from '../change_detection/change_detection_util';\nimport {PipeTransform} from '../change_detection/pipe_transform';\nimport {setInjectImplementation} from '../di/inject_switch';\nimport {getFactoryDef} from './definition_factory';\nimport {setIncludeViewProviders} from './di';\nimport {RuntimeError, RuntimeErrorCode} from './error_code';\nimport {store, ɵɵdirectiveInject} from './instructions/all';\nimport {PipeDef, PipeDefList} from './interfaces/definition';\nimport {HEADER_OFFSET, LView, TVIEW} from './interfaces/view';\nimport {pureFunction1Internal, pureFunction2Internal, pureFunction3Internal, pureFunction4Internal, pureFunctionVInternal} from './pure_function';\nimport {getBindingIndex, getBindingRoot, getLView, getTView} from './state';\nimport {NO_CHANGE} from './tokens';\nimport {load} from './util/view_utils';\n\n\n\n/**\n * Create a pipe.\n *\n * @param index Pipe index where the pipe will be stored.\n * @param pipeName The name of the pipe\n * @returns T the instance of the pipe.\n *\n * @codeGenApi\n */\nexport function ɵɵpipe(index: number, pipeName: string): any {\n  const tView = getTView();\n  let pipeDef: PipeDef<any>;\n  const adjustedIndex = index + HEADER_OFFSET;\n\n  if (tView.firstCreatePass) {\n    pipeDef = getPipeDef(pipeName, tView.pipeRegistry);\n    tView.data[adjustedIndex] = pipeDef;\n    if (pipeDef.onDestroy) {\n      (tView.destroyHooks || (tView.destroyHooks = [])).push(adjustedIndex, pipeDef.onDestroy);\n    }\n  } else {\n    pipeDef = tView.data[adjustedIndex] as PipeDef<any>;\n  }\n\n  const pipeFactory = pipeDef.factory || (pipeDef.factory = getFactoryDef(pipeDef.type, true));\n  const previousInjectImplementation = setInjectImplementation(ɵɵdirectiveInject);\n  try {\n    // DI for pipes is supposed to behave like directives when placed on a component\n    // host node, which means that we have to disable access to `viewProviders`.\n    const previousIncludeViewProviders = setIncludeViewProviders(false);\n    const pipeInstance = pipeFactory();\n    setIncludeViewProviders(previousIncludeViewProviders);\n    store(tView, getLView(), adjustedIndex, pipeInstance);\n    return pipeInstance;\n  } finally {\n    // we have to restore the injector implementation in finally, just in case the creation of the\n    // pipe throws an error.\n    setInjectImplementation(previousInjectImplementation);\n  }\n}\n\n/**\n * Searches the pipe registry for a pipe with the given name. If one is found,\n * returns the pipe. Otherwise, an error is thrown because the pipe cannot be resolved.\n *\n * @param name Name of pipe to resolve\n * @param registry Full list of available pipes\n * @returns Matching PipeDef\n */\nfunction getPipeDef(name: string, registry: PipeDefList|null): PipeDef<any> {\n  if (registry) {\n    for (let i = registry.length - 1; i >= 0; i--) {\n      const pipeDef = registry[i];\n      if (name === pipeDef.name) {\n        return pipeDef;\n      }\n    }\n  }\n  throw new RuntimeError(RuntimeErrorCode.PIPE_NOT_FOUND, `The pipe '${name}' could not be found!`);\n}\n\n/**\n * Invokes a pipe with 1 arguments.\n *\n * This instruction acts as a guard to {@link PipeTransform#transform} invoking\n * the pipe only when an input to the pipe changes.\n *\n * @param index Pipe index where the pipe was stored on creation.\n * @param slotOffset the offset in the reserved slot space\n * @param v1 1st argument to {@link PipeTransform#transform}.\n *\n * @codeGenApi\n */\nexport function ɵɵpipeBind1(index: number, slotOffset: number, v1: any): any {\n  const adjustedIndex = index + HEADER_OFFSET;\n  const lView = getLView();\n  const pipeInstance = load<PipeTransform>(lView, adjustedIndex);\n  return unwrapValue(\n      lView,\n      isPure(lView, adjustedIndex) ?\n          pureFunction1Internal(\n              lView, getBindingRoot(), slotOffset, pipeInstance.transform, v1, pipeInstance) :\n          pipeInstance.transform(v1));\n}\n\n/**\n * Invokes a pipe with 2 arguments.\n *\n * This instruction acts as a guard to {@link PipeTransform#transform} invoking\n * the pipe only when an input to the pipe changes.\n *\n * @param index Pipe index where the pipe was stored on creation.\n * @param slotOffset the offset in the reserved slot space\n * @param v1 1st argument to {@link PipeTransform#transform}.\n * @param v2 2nd argument to {@link PipeTransform#transform}.\n *\n * @codeGenApi\n */\nexport function ɵɵpipeBind2(index: number, slotOffset: number, v1: any, v2: any): any {\n  const adjustedIndex = index + HEADER_OFFSET;\n  const lView = getLView();\n  const pipeInstance = load<PipeTransform>(lView, adjustedIndex);\n  return unwrapValue(\n      lView,\n      isPure(lView, adjustedIndex) ?\n          pureFunction2Internal(\n              lView, getBindingRoot(), slotOffset, pipeInstance.transform, v1, v2, pipeInstance) :\n          pipeInstance.transform(v1, v2));\n}\n\n/**\n * Invokes a pipe with 3 arguments.\n *\n * This instruction acts as a guard to {@link PipeTransform#transform} invoking\n * the pipe only when an input to the pipe changes.\n *\n * @param index Pipe index where the pipe was stored on creation.\n * @param slotOffset the offset in the reserved slot space\n * @param v1 1st argument to {@link PipeTransform#transform}.\n * @param v2 2nd argument to {@link PipeTransform#transform}.\n * @param v3 4rd argument to {@link PipeTransform#transform}.\n *\n * @codeGenApi\n */\nexport function ɵɵpipeBind3(index: number, slotOffset: number, v1: any, v2: any, v3: any): any {\n  const adjustedIndex = index + HEADER_OFFSET;\n  const lView = getLView();\n  const pipeInstance = load<PipeTransform>(lView, adjustedIndex);\n  return unwrapValue(\n      lView,\n      isPure(lView, adjustedIndex) ? pureFunction3Internal(\n                                         lView, getBindingRoot(), slotOffset,\n                                         pipeInstance.transform, v1, v2, v3, pipeInstance) :\n                                     pipeInstance.transform(v1, v2, v3));\n}\n\n/**\n * Invokes a pipe with 4 arguments.\n *\n * This instruction acts as a guard to {@link PipeTransform#transform} invoking\n * the pipe only when an input to the pipe changes.\n *\n * @param index Pipe index where the pipe was stored on creation.\n * @param slotOffset the offset in the reserved slot space\n * @param v1 1st argument to {@link PipeTransform#transform}.\n * @param v2 2nd argument to {@link PipeTransform#transform}.\n * @param v3 3rd argument to {@link PipeTransform#transform}.\n * @param v4 4th argument to {@link PipeTransform#transform}.\n *\n * @codeGenApi\n */\nexport function ɵɵpipeBind4(\n    index: number, slotOffset: number, v1: any, v2: any, v3: any, v4: any): any {\n  const adjustedIndex = index + HEADER_OFFSET;\n  const lView = getLView();\n  const pipeInstance = load<PipeTransform>(lView, adjustedIndex);\n  return unwrapValue(\n      lView,\n      isPure(lView, adjustedIndex) ? pureFunction4Internal(\n                                         lView, getBindingRoot(), slotOffset,\n                                         pipeInstance.transform, v1, v2, v3, v4, pipeInstance) :\n                                     pipeInstance.transform(v1, v2, v3, v4));\n}\n\n/**\n * Invokes a pipe with variable number of arguments.\n *\n * This instruction acts as a guard to {@link PipeTransform#transform} invoking\n * the pipe only when an input to the pipe changes.\n *\n * @param index Pipe index where the pipe was stored on creation.\n * @param slotOffset the offset in the reserved slot space\n * @param values Array of arguments to pass to {@link PipeTransform#transform} method.\n *\n * @codeGenApi\n */\nexport function ɵɵpipeBindV(index: number, slotOffset: number, values: [any, ...any[]]): any {\n  const adjustedIndex = index + HEADER_OFFSET;\n  const lView = getLView();\n  const pipeInstance = load<PipeTransform>(lView, adjustedIndex);\n  return unwrapValue(\n      lView,\n      isPure(lView, adjustedIndex) ?\n          pureFunctionVInternal(\n              lView, getBindingRoot(), slotOffset, pipeInstance.transform, values, pipeInstance) :\n          pipeInstance.transform.apply(pipeInstance, values));\n}\n\nfunction isPure(lView: LView, index: number): boolean {\n  return (<PipeDef<any>>lView[TVIEW].data[index]).pure;\n}\n\n/**\n * Unwrap the output of a pipe transformation.\n * In order to trick change detection into considering that the new value is always different from\n * the old one, the old value is overwritten by NO_CHANGE.\n *\n * @param newValue the pipe transformation output.\n */\nfunction unwrapValue(lView: LView, newValue: any): any {\n  if (WrappedValue.isWrapped(newValue)) {\n    newValue = WrappedValue.unwrap(newValue);\n    // The NO_CHANGE value needs to be written at the index where the impacted binding value is\n    // stored\n    const bindingToInvalidateIdx = getBindingIndex();\n    lView[bindingToInvalidateIdx] = NO_CHANGE;\n  }\n  return newValue;\n}\n"]}