devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
56 lines (54 loc) • 2.18 kB
JavaScript
/**
* DevExtreme (cjs/__internal/ui/text_box/m_utils.scroll.js)
* Version: 24.2.6
* Build date: Mon Mar 17 2025
*
* Copyright (c) 2012 - 2025 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.prepareScrollData = exports.allowScroll = void 0;
var _index = require("../../../common/core/events/utils/index");
var _renderer = _interopRequireDefault(require("../../../core/renderer"));
function _interopRequireDefault(e) {
return e && e.__esModule ? e : {
default: e
}
}
const allowScroll = function(container, delta, shiftKey) {
const $container = (0, _renderer.default)(container);
const scrollTopPos = shiftKey ? $container.scrollLeft() : $container.scrollTop();
const prop = shiftKey ? "Width" : "Height";
const scrollSize = $container.prop(`scroll${prop}`);
const clientSize = $container.prop(`client${prop}`);
const scrollBottomPos = scrollSize - clientSize - scrollTopPos | 0;
if (0 === scrollTopPos && 0 === scrollBottomPos) {
return false
}
const isScrollFromTop = 0 === scrollTopPos && delta >= 0;
const isScrollFromBottom = 0 === scrollBottomPos && delta <= 0;
const isScrollFromMiddle = scrollTopPos > 0 && scrollBottomPos > 0;
if (isScrollFromTop || isScrollFromBottom || isScrollFromMiddle) {
return true
}
};
exports.allowScroll = allowScroll;
const prepareScrollData = function(container, validateTarget) {
const $container = (0, _renderer.default)(container);
return {
validate(e) {
if ((0, _index.isDxMouseWheelEvent)(e) && (eventTarget = e.target, validateTarget ? (0, _renderer.default)(eventTarget).is(container) : true)) {
if (allowScroll($container, -e.delta, e.shiftKey)) {
e._needSkipEvent = true;
return true
}
return false
}
var eventTarget
}
}
};
exports.prepareScrollData = prepareScrollData;