devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (cjs/ui/scroll_view/ui.scroll_view.native.pull_down.js)
* Version: 23.2.6
* Build date: Wed May 01 2024
*
* Copyright (c) 2012 - 2024 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
"use strict";
exports.default = void 0;
var _renderer = _interopRequireDefault(require("../../core/renderer"));
var _callbacks = _interopRequireDefault(require("../../core/utils/callbacks"));
var _translator = require("../../animation/translator");
var _uiScrollable = _interopRequireDefault(require("./ui.scrollable.native"));
var _load_indicator = _interopRequireDefault(require("../load_indicator"));
var _iterator = require("../../core/utils/iterator");
var _deferred = require("../../core/utils/deferred");
function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {
default: obj
}
}
const SCROLLVIEW_PULLDOWN_REFRESHING_CLASS = "dx-scrollview-pull-down-loading";
const SCROLLVIEW_PULLDOWN_READY_CLASS = "dx-scrollview-pull-down-ready";
const SCROLLVIEW_PULLDOWN_IMAGE_CLASS = "dx-scrollview-pull-down-image";
const SCROLLVIEW_PULLDOWN_INDICATOR_CLASS = "dx-scrollview-pull-down-indicator";
const SCROLLVIEW_PULLDOWN_TEXT_CLASS = "dx-scrollview-pull-down-text";
const SCROLLVIEW_PULLDOWN_VISIBLE_TEXT_CLASS = "dx-scrollview-pull-down-text-visible";
const STATE_RELEASED = 0;
const STATE_READY = 1;
const STATE_REFRESHING = 2;
const STATE_LOADING = 3;
const PULLDOWN_RELEASE_TIME = 400;
const PullDownNativeScrollViewStrategy = _uiScrollable.default.inherit({
_init: function(scrollView) {
this.callBase(scrollView);
this._$topPocket = scrollView._$topPocket;
this._$pullDown = scrollView._$pullDown;
this._$refreshingText = scrollView._$refreshingText;
this._$scrollViewContent = (0, _renderer.default)(scrollView.content());
this._$container = (0, _renderer.default)(scrollView.container());
this._initCallbacks()
},
_initCallbacks: function() {
this.pullDownCallbacks = (0, _callbacks.default)();
this.releaseCallbacks = (0, _callbacks.default)();
this.reachBottomCallbacks = (0, _callbacks.default)()
},
render: function() {
this.callBase();
this._renderPullDown();
this._releaseState()
},
_renderPullDown: function() {
const $image = (0, _renderer.default)("<div>").addClass("dx-scrollview-pull-down-image");
const $loadContainer = (0, _renderer.default)("<div>").addClass("dx-scrollview-pull-down-indicator");
const $loadIndicator = new _load_indicator.default((0, _renderer.default)("<div>")).$element();
const $text = this._$pullDownText = (0, _renderer.default)("<div>").addClass("dx-scrollview-pull-down-text");
this._$pullingDownText = (0, _renderer.default)("<div>").text(this.option("pullingDownText")).appendTo($text);
this._$pulledDownText = (0, _renderer.default)("<div>").text(this.option("pulledDownText")).appendTo($text);
this._$refreshingText = (0, _renderer.default)("<div>").text(this.option("refreshingText")).appendTo($text);
this._$pullDown.empty().append($image).append($loadContainer.append($loadIndicator)).append($text)
},
_releaseState: function() {
this._state = 0;
this._refreshPullDownText()
},
_refreshPullDownText: function() {
const that = this;
const pullDownTextItems = [{
element: this._$pullingDownText,
visibleState: 0
}, {
element: this._$pulledDownText,
visibleState: 1
}, {
element: this._$refreshingText,
visibleState: 2
}];
(0, _iterator.each)(pullDownTextItems, (function(_, item) {
const action = that._state === item.visibleState ? "addClass" : "removeClass";
item.element[action]("dx-scrollview-pull-down-text-visible")
}))
},
update: function() {
this.callBase();
this._setTopPocketOffset()
},
_updateDimensions: function() {
this.callBase();
this._topPocketSize = this._$topPocket.get(0).clientHeight;
const contentEl = this._$scrollViewContent.get(0);
const containerEl = this._$container.get(0);
this._bottomBoundary = Math.max(contentEl.clientHeight - containerEl.clientHeight, 0)
},
_allowedDirections: function() {
const allowedDirections = this.callBase();
allowedDirections.vertical = allowedDirections.vertical || this._pullDownEnabled;
return allowedDirections
},
_setTopPocketOffset: function() {
this._$topPocket.css({
top: -this._topPocketSize
})
},
handleEnd: function() {
this.callBase();
this._complete()
},
handleStop: function() {
this.callBase();
this._complete()
},
_complete: function() {
if (1 === this._state) {
this._setPullDownOffset(this._topPocketSize);
clearTimeout(this._pullDownRefreshTimeout);
this._pullDownRefreshTimeout = setTimeout(function() {
this._pullDownRefreshing()
}.bind(this), 400)
}
},
_setPullDownOffset: function(offset) {
(0, _translator.move)(this._$topPocket, {
top: offset
});
(0, _translator.move)(this._$scrollViewContent, {
top: offset
})
},
handleScroll: function(e) {
this.callBase(e);
if (2 === this._state) {
return
}
const currentLocation = this.location().top;
const scrollDelta = (this._location || 0) - currentLocation;
this._location = currentLocation;
if (this._isPullDown()) {
this._pullDownReady()
} else if (scrollDelta > 0 && this._isReachBottom()) {
this._reachBottom()
} else {
this._stateReleased()
}
},
_isPullDown: function() {
return this._pullDownEnabled && this._location >= this._topPocketSize
},
_isReachBottom: function() {
return this._reachBottomEnabled && Math.round(this._bottomBoundary + Math.floor(this._location)) <= 1
},
_reachBottom: function() {
if (3 === this._state) {
return
}
this._state = 3;
this.reachBottomCallbacks.fire()
},
_pullDownReady: function() {
if (1 === this._state) {
return
}
this._state = 1;
this._$pullDown.addClass("dx-scrollview-pull-down-ready");
this._refreshPullDownText()
},
_stateReleased: function() {
if (0 === this._state) {
return
}
this._$pullDown.removeClass("dx-scrollview-pull-down-loading").removeClass("dx-scrollview-pull-down-ready");
this._releaseState()
},
_pullDownRefreshing: function() {
if (2 === this._state) {
return
}
this._state = 2;
this._$pullDown.addClass("dx-scrollview-pull-down-loading").removeClass("dx-scrollview-pull-down-ready");
this._refreshPullDownText();
this.pullDownCallbacks.fire()
},
pullDownEnable: function(enabled) {
if (enabled) {
this._updateDimensions();
this._setTopPocketOffset()
}
this._pullDownEnabled = enabled
},
reachBottomEnable: function(enabled) {
this._reachBottomEnabled = enabled
},
pendingRelease: function() {
this._state = 1
},
release: function() {
const deferred = new _deferred.Deferred;
this._updateDimensions();
clearTimeout(this._releaseTimeout);
if (3 === this._state) {
this._state = 0
}
this._releaseTimeout = setTimeout(function() {
this._setPullDownOffset(0);
this._stateReleased();
this.releaseCallbacks.fire();
this._updateAction();
deferred.resolve()
}.bind(this), 400);
return deferred.promise()
},
dispose: function() {
clearTimeout(this._pullDownRefreshTimeout);
clearTimeout(this._releaseTimeout);
this.callBase()
}
});
var _default = PullDownNativeScrollViewStrategy;
exports.default = _default;
module.exports = exports.default;
module.exports.default = exports.default;