devextreme
Version:
JavaScript/TypeScript Component Suite for Responsive Web Development
59 lines (57 loc) • 2.3 kB
JavaScript
/**
* DevExtreme (cjs/__internal/ui/text_box/utils.scroll.js)
* Version: 25.2.5
* Build date: Fri Feb 20 2026
*
* Copyright (c) 2012 - 2026 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 = (container, delta, shiftKey) => {
const $container = (0, _renderer.default)(container);
const scrollTopPos = parseFloat(shiftKey ? $container.scrollLeft() : $container.scrollTop());
const prop = shiftKey ? "Width" : "Height";
const scrollSize = parseFloat($container.prop(`scroll${prop}`));
const clientSize = parseFloat($container.prop(`client${prop}`));
const scrollBottomPos = Math.trunc(scrollSize - clientSize - scrollTopPos);
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
}
return
};
exports.allowScroll = allowScroll;
const prepareScrollData = (container, validateTarget) => {
const $container = (0, _renderer.default)(container);
const scrollData = {
validate: e => {
if ((0, _index.isDxMouseWheelEvent)(e) && (eventTarget = e.target, validateTarget ? (0, _renderer.default)(eventTarget).is(container) : true)) {
if (allowScroll($container, -(e.delta ?? 0), e.shiftKey)) {
e._needSkipEvent = true;
return true
}
return false
}
var eventTarget;
return false
}
};
return scrollData
};
exports.prepareScrollData = prepareScrollData;