@angular/core/esm2015/src/render3/instructions/interpolation.js

Angular - the core framework

/**
 * @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/misc_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/misc_utils';\n\n\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(lView: LView, prefix: string, v0: any, suffix: string): string|\n    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, prefix: string, v0: any, i0: string, v1: any, suffix: string): 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, prefix: string, v0: any, i0: string, v1: any, i1: string, v2: any,\n    suffix: string): 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, prefix: string, v0: any, i0: string, v1: any, i1: string, v2: any, i2: string,\n    v3: any, suffix: string): string|NO_CHANGE {\n  const bindingIndex = getBindingIndex();\n  const different = bindingUpdated4(lView, bindingIndex, v0, v1, v2, v3);\n  incrementBindingIndex(4);\n\n  return different ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 +\n          renderStringify(v2) + i2 + renderStringify(v3) + suffix :\n                     NO_CHANGE;\n}\n\n/**\n * Creates an interpolation binding with 5 expressions.\n */\nexport function interpolation5(\n    lView: LView, prefix: string, v0: any, i0: string, v1: any, i1: string, v2: any, i2: string,\n    v3: any, i3: string, v4: any, suffix: string): 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 ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 +\n          renderStringify(v2) + i2 + renderStringify(v3) + i3 + renderStringify(v4) + suffix :\n                     NO_CHANGE;\n}\n\n/**\n * Creates an interpolation binding with 6 expressions.\n */\nexport function interpolation6(\n    lView: LView, prefix: string, v0: any, i0: string, v1: any, i1: string, v2: any, i2: string,\n    v3: any, i3: string, v4: any, i4: string, v5: any, suffix: string): 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 + renderStringify(v0) + i0 + renderStringify(v1) + i1 + renderStringify(v2) + i2 +\n          renderStringify(v3) + i3 + renderStringify(v4) + i4 + renderStringify(v5) + suffix :\n      NO_CHANGE;\n}\n\n/**\n * Creates an interpolation binding with 7 expressions.\n */\nexport function interpolation7(\n    lView: LView, prefix: string, v0: any, i0: string, v1: any, i1: string, v2: any, i2: string,\n    v3: any, i3: string, v4: any, i4: string, v5: any, i5: string, v6: any, suffix: string): string|\n    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 ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 +\n          renderStringify(v2) + i2 + renderStringify(v3) + i3 + renderStringify(v4) + i4 +\n          renderStringify(v5) + i5 + renderStringify(v6) + suffix :\n                     NO_CHANGE;\n}\n\n/**\n * Creates an interpolation binding with 8 expressions.\n */\nexport function interpolation8(\n    lView: LView, prefix: string, v0: any, i0: string, v1: any, i1: string, v2: any, i2: string,\n    v3: any, i3: string, v4: any, i4: string, v5: any, i5: string, v6: any, i6: string, v7: any,\n    suffix: string): 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 ? prefix + renderStringify(v0) + i0 + renderStringify(v1) + i1 +\n          renderStringify(v2) + i2 + renderStringify(v3) + i3 + renderStringify(v4) + i4 +\n          renderStringify(v5) + i5 + renderStringify(v6) + i6 + renderStringify(v7) + suffix :\n                     NO_CHANGE;\n}\n"]}