svogv/esm2015/lib/decorators/hint-templatehint.decorator.js

A decorator based approach for model driven forms, including an advanced DataGrid and a TreeView component.

/**
 * The TemplateHint decorator.
 *
 * One can define the way a property gets rendered.
 * Currently supported:
 *  - TextArea
 *  - Calendar
 *  - Range
 *  - Number
 *  - Text
 *
 * The Calendar creates Date-field. However, in casde of a datatype Date the date field will be created anyway.
 *
 * @param template        The Name that appears in form fields as a watermark.
 * @param params          Depending of template some additional values as a dictionary.
 */
export function TemplateHint(template, params) {
    function templateHintInternalSetup(target, key) {
        // create a helper property to transport a meta data value
        Object.defineProperty(target, `__templatehint__${key}`, {
            value: template,
            enumerable: false,
            configurable: false
        });
        if (params) {
            Object.defineProperty(target, `__templatehintParams__${key}`, {
                value: params,
                enumerable: false,
                configurable: false
            });
        }
        Object.defineProperty(target, `__hasTemplateHint__${key}`, {
            value: true,
            enumerable: false,
            configurable: false
        });
    }
    // the original decorator
    function templateHintInternal(target, name) {
        templateHintInternalSetup(target, name);
    }
    // return the decorator
    return templateHintInternal;
}
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