@angular/core
Version:
Angular - the core framework
195 lines • 25.2 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 { assertEqual, assertLessThan } from '../../util/assert';
import { bindingUpdated, bindingUpdated2, bindingUpdated3, bindingUpdated4 } from '../bindings';
import { getBindingIndex, incrementBindingIndex, nextBindingIndex, setBindingIndex } from '../state';
import { NO_CHANGE } from '../tokens';
import { renderStringify } from '../util/stringify_utils';
/**
* Create interpolation bindings with a variable number of expressions.
*
* If there are 1 to 8 expressions `interpolation1()` to `interpolation8()` should be used instead.
* Those are faster because there is no need to create an array of expressions and iterate over it.
*
* `values`:
* - has static text at even indexes,
* - has evaluated expressions at odd indexes.
*
* Returns the concatenated string when any of the arguments changes, `NO_CHANGE` otherwise.
*/
export function interpolationV(lView, values) {
ngDevMode && assertLessThan(2, values.length, 'should have at least 3 values');
ngDevMode && assertEqual(values.length % 2, 1, 'should have an odd number of values');
let isBindingUpdated = false;
let bindingIndex = getBindingIndex();
for (let i = 1; i < values.length; i += 2) {
// Check if bindings (odd indexes) have changed
isBindingUpdated = bindingUpdated(lView, bindingIndex++, values[i]) || isBindingUpdated;
}
setBindingIndex(bindingIndex);
if (!isBindingUpdated) {
return NO_CHANGE;
}
// Build the updated content
let content = values[0];
for (let i = 1; i < values.length; i += 2) {
content += renderStringify(values[i]) + values[i + 1];
}
return content;
}
/**
* Creates an interpolation binding with 1 expression.
*
* @param prefix static value used for concatenation only.
* @param v0 value checked for change.
* @param suffix static value used for concatenation only.
*/
export function interpolation1(lView, prefix, v0, suffix) {
const different = bindingUpdated(lView, nextBindingIndex(), v0);
return different ? prefix + renderStringify(v0) + suffix : NO_CHANGE;
}
/**
* Creates an interpolation binding with 2 expressions.
*/
export function interpolation2(lView, prefix, v0, i0, v1, suffix) {
const bindingIndex = getBindingIndex();
const different = bindingUpdated2(lView, bindingIndex, v0, v1);
incrementBindingIndex(2);
return different ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + suffix : NO_CHANGE;
}
/**
* Creates an interpolation binding with 3 expressions.
*/
export function interpolation3(lView, prefix, v0, i0, v1, i1, v2, suffix) {
const bindingIndex = getBindingIndex();
const different = bindingUpdated3(lView, bindingIndex, v0, v1, v2);
incrementBindingIndex(3);
return different
? prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 + renderStringify(v2) + suffix
: NO_CHANGE;
}
/**
* Create an interpolation binding with 4 expressions.
*/
export function interpolation4(lView, prefix, v0, i0, v1, i1, v2, i2, v3, suffix) {
const bindingIndex = getBindingIndex();
const different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);
incrementBindingIndex(4);
return different
? prefix +
renderStringify(v0) +
i0 +
renderStringify(v1) +
i1 +
renderStringify(v2) +
i2 +
renderStringify(v3) +
suffix
: NO_CHANGE;
}
/**
* Creates an interpolation binding with 5 expressions.
*/
export function interpolation5(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, suffix) {
const bindingIndex = getBindingIndex();
let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);
different = bindingUpdated(lView, bindingIndex + 4, v4) || different;
incrementBindingIndex(5);
return different
? prefix +
renderStringify(v0) +
i0 +
renderStringify(v1) +
i1 +
renderStringify(v2) +
i2 +
renderStringify(v3) +
i3 +
renderStringify(v4) +
suffix
: NO_CHANGE;
}
/**
* Creates an interpolation binding with 6 expressions.
*/
export function interpolation6(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, suffix) {
const bindingIndex = getBindingIndex();
let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);
different = bindingUpdated2(lView, bindingIndex + 4, v4, v5) || different;
incrementBindingIndex(6);
return different
? prefix +
renderStringify(v0) +
i0 +
renderStringify(v1) +
i1 +
renderStringify(v2) +
i2 +
renderStringify(v3) +
i3 +
renderStringify(v4) +
i4 +
renderStringify(v5) +
suffix
: NO_CHANGE;
}
/**
* Creates an interpolation binding with 7 expressions.
*/
export function interpolation7(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, suffix) {
const bindingIndex = getBindingIndex();
let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);
different = bindingUpdated3(lView, bindingIndex + 4, v4, v5, v6) || different;
incrementBindingIndex(7);
return different
? prefix +
renderStringify(v0) +
i0 +
renderStringify(v1) +
i1 +
renderStringify(v2) +
i2 +
renderStringify(v3) +
i3 +
renderStringify(v4) +
i4 +
renderStringify(v5) +
i5 +
renderStringify(v6) +
suffix
: NO_CHANGE;
}
/**
* Creates an interpolation binding with 8 expressions.
*/
export function interpolation8(lView, prefix, v0, i0, v1, i1, v2, i2, v3, i3, v4, i4, v5, i5, v6, i6, v7, suffix) {
const bindingIndex = getBindingIndex();
let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);
different = bindingUpdated4(lView, bindingIndex + 4, v4, v5, v6, v7) || different;
incrementBindingIndex(8);
return different
? prefix +
renderStringify(v0) +
i0 +
renderStringify(v1) +
i1 +
renderStringify(v2) +
i2 +
renderStringify(v3) +
i3 +
renderStringify(v4) +
i4 +
renderStringify(v5) +
i5 +
renderStringify(v6) +
i6 +
renderStringify(v7) +
suffix
: NO_CHANGE;
}
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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 {assertEqual, assertLessThan} from '../../util/assert';\nimport {bindingUpdated, bindingUpdated2, bindingUpdated3, bindingUpdated4} from '../bindings';\nimport {LView} from '../interfaces/view';\nimport {getBindingIndex, incrementBindingIndex, nextBindingIndex, setBindingIndex} from '../state';\nimport {NO_CHANGE} from '../tokens';\nimport {renderStringify} from '../util/stringify_utils';\n\n/**\n * Create interpolation bindings with a variable number of expressions.\n *\n * If there are 1 to 8 expressions `interpolation1()` to `interpolation8()` should be used instead.\n * Those are faster because there is no need to create an array of expressions and iterate over it.\n *\n * `values`:\n * - has static text at even indexes,\n * - has evaluated expressions at odd indexes.\n *\n * Returns the concatenated string when any of the arguments changes, `NO_CHANGE` otherwise.\n */\nexport function interpolationV(lView: LView, values: any[]): string | NO_CHANGE {\n  ngDevMode && assertLessThan(2, values.length, 'should have at least 3 values');\n  ngDevMode && assertEqual(values.length % 2, 1, 'should have an odd number of values');\n  let isBindingUpdated = false;\n  let bindingIndex = getBindingIndex();\n\n  for (let i = 1; i < values.length; i += 2) {\n    // Check if bindings (odd indexes) have changed\n    isBindingUpdated = bindingUpdated(lView, bindingIndex++, values[i]) || isBindingUpdated;\n  }\n  setBindingIndex(bindingIndex);\n\n  if (!isBindingUpdated) {\n    return NO_CHANGE;\n  }\n\n  // Build the updated content\n  let content = values[0];\n  for (let i = 1; i < values.length; i += 2) {\n    content += renderStringify(values[i]) + values[i + 1];\n  }\n\n  return content;\n}\n\n/**\n * Creates an interpolation binding with 1 expression.\n *\n * @param prefix static value used for concatenation only.\n * @param v0 value checked for change.\n * @param suffix static value used for concatenation only.\n */\nexport function interpolation1(\n  lView: LView,\n  prefix: string,\n  v0: any,\n  suffix: string,\n): string | NO_CHANGE {\n  const different = bindingUpdated(lView, nextBindingIndex(), v0);\n  return different ? prefix + renderStringify(v0) + suffix : NO_CHANGE;\n}\n\n/**\n * Creates an interpolation binding with 2 expressions.\n */\nexport function interpolation2(\n  lView: LView,\n  prefix: string,\n  v0: any,\n  i0: string,\n  v1: any,\n  suffix: string,\n): string | NO_CHANGE {\n  const bindingIndex = getBindingIndex();\n  const different = bindingUpdated2(lView, bindingIndex, v0, v1);\n  incrementBindingIndex(2);\n\n  return different ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + suffix : NO_CHANGE;\n}\n\n/**\n * Creates an interpolation binding with 3 expressions.\n */\nexport function interpolation3(\n  lView: LView,\n  prefix: string,\n  v0: any,\n  i0: string,\n  v1: any,\n  i1: string,\n  v2: any,\n  suffix: string,\n): string | NO_CHANGE {\n  const bindingIndex = getBindingIndex();\n  const different = bindingUpdated3(lView, bindingIndex, v0, v1, v2);\n  incrementBindingIndex(3);\n\n  return different\n    ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 + renderStringify(v2) + suffix\n    : NO_CHANGE;\n}\n\n/**\n * Create an interpolation binding with 4 expressions.\n */\nexport function interpolation4(\n  lView: LView,\n  prefix: string,\n  v0: any,\n  i0: string,\n  v1: any,\n  i1: string,\n  v2: any,\n  i2: string,\n  v3: any,\n  suffix: string,\n): string | NO_CHANGE {\n  const bindingIndex = getBindingIndex();\n  const different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n  incrementBindingIndex(4);\n\n  return different\n    ? prefix +\n        renderStringify(v0) +\n        i0 +\n        renderStringify(v1) +\n        i1 +\n        renderStringify(v2) +\n        i2 +\n        renderStringify(v3) +\n        suffix\n    : NO_CHANGE;\n}\n\n/**\n * Creates an interpolation binding with 5 expressions.\n */\nexport function interpolation5(\n  lView: LView,\n  prefix: string,\n  v0: any,\n  i0: string,\n  v1: any,\n  i1: string,\n  v2: any,\n  i2: string,\n  v3: any,\n  i3: string,\n  v4: any,\n  suffix: string,\n): string | NO_CHANGE {\n  const bindingIndex = getBindingIndex();\n  let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n  different = bindingUpdated(lView, bindingIndex + 4, v4) || different;\n  incrementBindingIndex(5);\n\n  return different\n    ? prefix +\n        renderStringify(v0) +\n        i0 +\n        renderStringify(v1) +\n        i1 +\n        renderStringify(v2) +\n        i2 +\n        renderStringify(v3) +\n        i3 +\n        renderStringify(v4) +\n        suffix\n    : NO_CHANGE;\n}\n\n/**\n * Creates an interpolation binding with 6 expressions.\n */\nexport function interpolation6(\n  lView: LView,\n  prefix: string,\n  v0: any,\n  i0: string,\n  v1: any,\n  i1: string,\n  v2: any,\n  i2: string,\n  v3: any,\n  i3: string,\n  v4: any,\n  i4: string,\n  v5: any,\n  suffix: string,\n): string | NO_CHANGE {\n  const bindingIndex = getBindingIndex();\n  let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n  different = bindingUpdated2(lView, bindingIndex + 4, v4, v5) || different;\n  incrementBindingIndex(6);\n\n  return different\n    ? prefix +\n        renderStringify(v0) +\n        i0 +\n        renderStringify(v1) +\n        i1 +\n        renderStringify(v2) +\n        i2 +\n        renderStringify(v3) +\n        i3 +\n        renderStringify(v4) +\n        i4 +\n        renderStringify(v5) +\n        suffix\n    : NO_CHANGE;\n}\n\n/**\n * Creates an interpolation binding with 7 expressions.\n */\nexport function interpolation7(\n  lView: LView,\n  prefix: string,\n  v0: any,\n  i0: string,\n  v1: any,\n  i1: string,\n  v2: any,\n  i2: string,\n  v3: any,\n  i3: string,\n  v4: any,\n  i4: string,\n  v5: any,\n  i5: string,\n  v6: any,\n  suffix: string,\n): string | NO_CHANGE {\n  const bindingIndex = getBindingIndex();\n  let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n  different = bindingUpdated3(lView, bindingIndex + 4, v4, v5, v6) || different;\n  incrementBindingIndex(7);\n\n  return different\n    ? prefix +\n        renderStringify(v0) +\n        i0 +\n        renderStringify(v1) +\n        i1 +\n        renderStringify(v2) +\n        i2 +\n        renderStringify(v3) +\n        i3 +\n        renderStringify(v4) +\n        i4 +\n        renderStringify(v5) +\n        i5 +\n        renderStringify(v6) +\n        suffix\n    : NO_CHANGE;\n}\n\n/**\n * Creates an interpolation binding with 8 expressions.\n */\nexport function interpolation8(\n  lView: LView,\n  prefix: string,\n  v0: any,\n  i0: string,\n  v1: any,\n  i1: string,\n  v2: any,\n  i2: string,\n  v3: any,\n  i3: string,\n  v4: any,\n  i4: string,\n  v5: any,\n  i5: string,\n  v6: any,\n  i6: string,\n  v7: any,\n  suffix: string,\n): string | NO_CHANGE {\n  const bindingIndex = getBindingIndex();\n  let different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n  different = bindingUpdated4(lView, bindingIndex + 4, v4, v5, v6, v7) || different;\n  incrementBindingIndex(8);\n\n  return different\n    ? prefix +\n        renderStringify(v0) +\n        i0 +\n        renderStringify(v1) +\n        i1 +\n        renderStringify(v2) +\n        i2 +\n        renderStringify(v3) +\n        i3 +\n        renderStringify(v4) +\n        i4 +\n        renderStringify(v5) +\n        i5 +\n        renderStringify(v6) +\n        i6 +\n        renderStringify(v7) +\n        suffix\n    : NO_CHANGE;\n}\n"]}