@angular/material
Version:
Angular Material
91 lines • 8.6 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
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.isHammerJsUsedInTemplate = void 0;
const schematics_1 = require("@angular/cdk/schematics");
/** List of known events which are supported by the "HammerGesturesPlugin". */
const STANDARD_HAMMERJS_EVENTS = [
// Events supported by the "HammerGesturesPlugin". See:
// angular/angular/blob/0119f46d/packages/platform-browser/src/dom/events/hammer_gestures.ts#L19
'pan',
'panstart',
'panmove',
'panend',
'pancancel',
'panleft',
'panright',
'panup',
'pandown',
'pinch',
'pinchstart',
'pinchmove',
'pinchend',
'pinchcancel',
'pinchin',
'pinchout',
'press',
'pressup',
'rotate',
'rotatestart',
'rotatemove',
'rotateend',
'rotatecancel',
'swipe',
'swipeleft',
'swiperight',
'swipeup',
'swipedown',
'tap',
];
/** List of events which are provided by the deprecated Angular Material "GestureConfig". */
const CUSTOM_MATERIAL_HAMMERJS_EVENS = [
'longpress',
'slide',
'slidestart',
'slideend',
'slideright',
'slideleft',
];
/**
* Parses the specified HTML and searches for elements with Angular outputs listening to
* one of the known HammerJS events. This check naively assumes that the bindings never
* match on a component output, but only on the Hammer plugin.
*/
function isHammerJsUsedInTemplate(html) {
const document = schematics_1.parse5.parseFragment(html, { sourceCodeLocationInfo: true });
let customEvents = false;
let standardEvents = false;
const visitNodes = (nodes) => {
nodes.forEach(node => {
if (!isElement(node)) {
return;
}
for (let attr of node.attrs) {
if (!customEvents && CUSTOM_MATERIAL_HAMMERJS_EVENS.some(e => `(${e})` === attr.name)) {
customEvents = true;
}
if (!standardEvents && STANDARD_HAMMERJS_EVENTS.some(e => `(${e})` === attr.name)) {
standardEvents = true;
}
}
// Do not continue traversing the AST if both type of HammerJS
// usages have been detected already.
if (!customEvents || !standardEvents) {
visitNodes(node.childNodes);
}
});
};
visitNodes(document.childNodes);
return { customEvents, standardEvents };
}
exports.isHammerJsUsedInTemplate = isHammerJsUsedInTemplate;
function isElement(node) {
return !!node.attrs;
}
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