import * as is from '@interactjs/utils/is';
import events from '@interactjs/utils/events';
import { nodeContains, matchesSelector } from '@interactjs/utils/domUtils';
import { getWindow } from '@interactjs/utils/window';
function preventDefault (interactable, newValue) {
if (/^(always|never|auto)$/.test(newValue)) {
interactable.options.preventDefault = newValue;
return interactable;
}
if (is.bool(newValue)) {
interactable.options.preventDefault = newValue? 'always' : 'never';
return interactable;
}
return interactable.options.preventDefault;
}
function checkAndPreventDefault (interactable, scope, event) {
const setting = interactable.options.preventDefault;
if (setting === 'never') { return; }
if (setting === 'always') {
event.preventDefault();
return;
}
// setting === 'auto'
// if the browser supports passive event listeners and isn't running on iOS,
// don't preventDefault of touch{start,move} events. CSS touch-action and
// user-select should be used instead of calling event.preventDefault().
if (events.supportsPassive && /^touch(start|move)$/.test(event.type)) {
const doc = getWindow(event.target).document;
const docOptions = scope.getDocOptions(doc);
if (!(docOptions && docOptions.events) || docOptions.events.passive !== false) {
return;
}
}
// don't preventDefault of pointerdown events
if (/^(mouse|pointer|touch)*(down|start)/i.test(event.type)) {
return;
}
// don't preventDefault on editable elements
if (is.element(event.target)
&& matchesSelector(event.target, 'input,select,textarea,[contenteditable=true],[contenteditable=true] *')) {
return;
}
event.preventDefault();
}
function onInteractionEvent ({ interaction, event }) {
if (interaction.target) {
interaction.target.checkAndPreventDefault(event);
}
}
export function init (scope) {
/** @lends Interactable */
const Interactable = scope.Interactable;
/**
* Returns or sets whether to prevent the browser's default behaviour in
* response to pointer events. Can be set to:
* - `'always'` to always prevent
* - `'never'` to never prevent
* - `'auto'` to let interact.js try to determine what would be best
*
* @param {string} [newValue] `'always'`, `'never'` or `'auto'`
* @return {string | Interactable} The current setting or this Interactable
*/
Interactable.prototype.preventDefault = function (newValue) {
return preventDefault(this, newValue);
};
Interactable.prototype.checkAndPreventDefault = function (event) {
return checkAndPreventDefault(this, scope, event);
};
for (const eventSignal of ['down', 'move', 'up', 'cancel']) {
scope.interactions.signals.on(eventSignal, onInteractionEvent);
}
// prevent native HTML5 drag on interact.js target elements
scope.interactions.eventMap.dragstart = function preventNativeDrag (event) {
for (const interaction of scope.interactions.list) {
if (interaction.element
&& (interaction.element === event.target
|| nodeContains(interaction.element, event.target))) {
interaction.target.checkAndPreventDefault(event);
return;
}
}
};
}
export default { init };