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perf(ivy): chain multiple property instructions (#31078)

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Currently each property binding generates an instruction like this:

```
property('prop1', ctx.value1);
property('prop2', ctx.value2);
```

The problem is that we're repeating the call to `property` for each of the properties. Since the `property` instruction returns itself, we can chain all of the calls which is more compact and it looks like this:

```
property('prop1', ctx.value1)('prop2', ctx.value2);
```

These changes implement the chaining behavior for regular property bindings and for synthetic ones, however interpolated ones are still handled like before, because they use a separate instruction.

This PR resolves FW-1389.

PR Close #31078
This commit is contained in:
crisbeto
2019-06-19 19:50:42 +02:00
committed by Kara Erickson
parent ab86a58f27
commit 4b16d98955
4 changed files with 305 additions and 25 deletions
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226
packages/compiler-cli/test/compliance/r3_view_compiler_binding_spec.ts
View File

@ -180,6 +180,232 @@ describe('compiler compliance: bindings', () => {
expectEmit(result.source, template, 'Incorrect template');
});
it('should chain multiple property bindings into a single instruction', () => {
const files = {
app: {
'example.ts': `
import {Component} from '@angular/core';
@Component({
template: '<button [title]="myTitle" [id]="buttonId" [tabindex]="1"></button>'
})
export class MyComponent {
myTitle = 'hello';
buttonId = 'special-button';
}`
}
};
const result = compile(files, angularFiles);
const template = `
…
template: function MyComponent_Template(rf, ctx) {
…
if (rf & 2) {
$r3$.ɵɵproperty("title", ctx.myTitle)("id", ctx.buttonId)("tabindex", 1);
}
}
`;
expectEmit(result.source, template, 'Incorrect template');
});
it('should chain property bindings in the presence of other instructions', () => {
const files = {
app: {
'example.ts': `
import {Component} from '@angular/core';
@Component({
template: '<button [title]="1" [attr.id]="2" [tabindex]="3" aria-label="{{1 + 3}}"></button>'
})
export class MyComponent {}`
}
};
const result = compile(files, angularFiles);
const template = `
…
template: function MyComponent_Template(rf, ctx) {
…
if (rf & 2) {
$r3$.ɵɵattribute("id", 2);
$r3$.ɵɵpropertyInterpolate("aria-label", 1 + 3);
$r3$.ɵɵproperty("title", 1)("tabindex", 3);
}
}
`;
expectEmit(result.source, template, 'Incorrect template');
});
it('should not add interpolated properties to the property instruction chain', () => {
const files = {
app: {
'example.ts': `
import {Component} from '@angular/core';
@Component({
template: '<button [title]="1" [id]="2" tabindex="{{0 + 3}}" aria-label="hello-{{1 + 3}}-{{2 + 3}}"></button>'
})
export class MyComponent {}`
}
};
const result = compile(files, angularFiles);
const template = `
…
template: function MyComponent_Template(rf, ctx) {
…
if (rf & 2) {
$r3$.ɵɵpropertyInterpolate("tabindex", 0 + 3);
$r3$.ɵɵpropertyInterpolate2("aria-label", "hello-", 1 + 3, "-", 2 + 3, "");
$r3$.ɵɵproperty("title", 1)("id", 2);
}
}
`;
expectEmit(result.source, template, 'Incorrect template');
});
it('should chain synthetic property bindings together with regular property bindings', () => {
const files = {
app: {
'example.ts': `
import {Component} from '@angular/core';
@Component({
template: \`
<button
[title]="myTitle"
[@expand]="expansionState"
[tabindex]="1"
[@fade]="'out'"></button>
\`
})
export class MyComponent {
expansionState = 'expanded';
}`
}
};
const result = compile(files, angularFiles);
const template = `
…
template: function MyComponent_Template(rf, ctx) {
…
if (rf & 2) {
$r3$.ɵɵproperty("title", ctx.myTitle)("@expand", ctx.expansionState)("tabindex", 1)("@fade", "out");
}
}
`;
expectEmit(result.source, template, 'Incorrect template');
});
it('should chain multiple property bindings on an ng-template', () => {
const files = {
app: {
'example.ts': `
import {Component} from '@angular/core';
@Component({
template: '<ng-template [title]="myTitle" [id]="buttonId" [tabindex]="1"></ng-template>'
})
export class MyComponent {
myTitle = 'hello';
buttonId = 'custom-id';
}`
}
};
const result = compile(files, angularFiles);
const template = `
…
template: function MyComponent_Template(rf, ctx) {
…
if (rf & 2) {
$r3$.ɵɵproperty("title", ctx.myTitle)("id", ctx.buttonId)("tabindex", 1);
}
}
`;
expectEmit(result.source, template, 'Incorrect template');
});
it('should chain multiple property bindings when there are multiple elements', () => {
const files = {
app: {
'example.ts': `
import {Component} from '@angular/core';
@Component({
template: \`
<button [title]="myTitle" [id]="buttonId" [tabindex]="1"></button>
<span [id]="1" [title]="'hello'" [someProp]="1 + 2"></span>
<custom-element [prop]="'one'" [otherProp]="2"></custom-element>
\`
})
export class MyComponent {
myTitle = 'hello';
buttonId = 'special-button';
}`
}
};
const result = compile(files, angularFiles);
const template = `
…
template: function MyComponent_Template(rf, ctx) {
…
if (rf & 2) {
$r3$.ɵɵproperty("title", ctx.myTitle)("id", ctx.buttonId)("tabindex", 1);
$r3$.ɵɵselect(1);
$r3$.ɵɵproperty("id", 1)("title", "hello")("someProp", 1 + 2);
$r3$.ɵɵselect(2);
$r3$.ɵɵproperty("prop", "one")("otherProp", 2);
}
}
`;
expectEmit(result.source, template, 'Incorrect template');
});
it('should chain multiple property bindings when there are child elements', () => {
const files = {
app: {
'example.ts': `
import {Component} from '@angular/core';
@Component({
template: \`
<button [title]="myTitle" [id]="buttonId" [tabindex]="1">
<span [id]="1" [title]="'hello'" [someProp]="1 + 2"></span>
</button>\`
})
export class MyComponent {
myTitle = 'hello';
buttonId = 'special-button';
}`
}
};
const result = compile(files, angularFiles);
const template = `
…
template: function MyComponent_Template(rf, ctx) {
…
if (rf & 2) {
$r3$.ɵɵproperty("title", ctx.myTitle)("id", ctx.buttonId)("tabindex", 1);
$r3$.ɵɵselect(1);
$r3$.ɵɵproperty("id", 1)("title", "hello")("someProp", 1 + 2);
}
}
`;
expectEmit(result.source, template, 'Incorrect template');
});
});
describe('host bindings', () => {