adaptive-expressions
Version:
Common Expression Language
59 lines • 2.04 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ValueExpression = void 0;
/**
* @module adaptive-expressions
*/
/**
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License.
*/
const expressionProperty_1 = require("./expressionProperty");
/**
* Represents a property which is an object of any kind or a string expression.
*
* @remarks
* If the value is
* - a string with '=' prefix then the string is treated as an expression to resolve to a string.
* - a string without '=' then value is treated as string with string interpolation.
* - You can escape the '=' prefix by putting a backslash.
* Examples:
* prop = "Hello @{user.name}" => "Hello Joe"
* prop = "=length(user.name)" => "3"
* prop = "=user.name" => "Joe"
* prop = "\=user" => "=user".
*/
class ValueExpression extends expressionProperty_1.ExpressionProperty {
/**
* Initializes a new instance of the [ValueExpression](xref:adaptive-expressions.ValueExpression) class.
*
* @param value An object of `any` kind or a `string` expression.
*/
constructor(value) {
super(value);
}
/**
* Set value as value expression.
*
* @param value Value to set.
*/
setValue(value) {
super.setValue(undefined);
if (typeof value == 'string') {
if (value.startsWith('=')) {
this.expressionText = value;
return;
}
else if (value.startsWith('\\=')) {
// Trim off the escape char for equals (\=foo) should simply be the string (=foo).
value = value.substr(1);
}
// keep the string as quoted expression, which will be literal unless string interpolation is used.
this.expressionText = `=\`${value.replace('`', '\\`')}\``;
return;
}
super.setValue(value);
}
}
exports.ValueExpression = ValueExpression;
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