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| 'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.ALLOW_ELEMENT_OVERFLOW_TOUCH = exports.EVENT_AFTER_FIXED_REMOVE = exports.EVENT_BEFORE_FIXED_ADD = undefined;
var _typeof2 = require('babel-runtime/helpers/typeof');
var _typeof3 = _interopRequireDefault(_typeof2);
var _slicedToArray2 = require('babel-runtime/helpers/slicedToArray');
var _slicedToArray3 = _interopRequireDefault(_slicedToArray2);
var _assign = require('babel-runtime/core-js/object/assign');
var _assign2 = _interopRequireDefault(_assign);
var _from = require('babel-runtime/core-js/array/from');
var _from2 = _interopRequireDefault(_from);
var _set = require('babel-runtime/core-js/set');
var _set2 = _interopRequireDefault(_set);
var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');
var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);
var _createClass2 = require('babel-runtime/helpers/createClass');
var _createClass3 = _interopRequireDefault(_createClass2);
var _Settings = require('../util/Settings');
var _Settings2 = _interopRequireDefault(_Settings);
var _debounce = require('./debounce');
var _debounce2 = _interopRequireDefault(_debounce);
var _Event = require('../util/Event');
var _Event2 = _interopRequireDefault(_Event);
var _Util = require('../util/Util');
var _Util2 = _interopRequireDefault(_Util);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var CLS_FIXED_WINDOW = 'fixed-window-open';
var EVENT_BEFORE_FIXED_ADD = exports.EVENT_BEFORE_FIXED_ADD = 'flexcss.fixedWindow.beforeAdd';
var EVENT_AFTER_FIXED_REMOVE = exports.EVENT_AFTER_FIXED_REMOVE = 'flexcss.fixedWindow.afterRemove';
/**
* @type {string}
*/
var ALLOW_ELEMENT_OVERFLOW_TOUCH = exports.ALLOW_ELEMENT_OVERFLOW_TOUCH = 'data-overflow';
/**
* @type {FixedWindow}
*/
var fixedWindowInstance = void 0;
var FixedWindow = function () {
function FixedWindow() {
(0, _classCallCheck3.default)(this, FixedWindow);
this.widgets = [];
this.currentScrollTop = 0;
this.fixedScreenConstraints = [];
this.windowWidth = 0;
this.isFixedWindowActive = false;
this.touchListener = null;
}
/**
* Adds a constraint to detect if the window needs to be changed when the screensize changes
*
* @param {Function} widget
* @param {Function} fixedBreakpointFn gets a width argument, return true to open a window
*/
(0, _createClass3.default)(FixedWindow, [{
key: 'addScreenConstraint',
value: function addScreenConstraint(widget, fixedBreakpointFn) {
this.fixedScreenConstraints[widget] = fixedBreakpointFn;
}
/**
* @returns {null|DestroyableWidget}
*/
}, {
key: 'getCurrentWidget',
value: function getCurrentWidget() {
return this.widgets.length > 0 ? this.widgets[this.widgets.length - 1] : null;
}
}, {
key: 'getLastFixedWidget',
value: function getLastFixedWidget() {
var length = this.widgets.length;
var widget = null;
while (length > 0) {
var thisWidget = this.widgets[length - 1];
if (thisWidget.fixed) {
widget = thisWidget;
break;
}
length--;
}
return widget;
}
/**
* @private
*/
}, {
key: '_checkFixedNeeded',
value: function _checkFixedNeeded() {
var _this = this;
if (this.widgets.length === 0) {
return;
}
var widgets = new _set2.default(this.widgets);
var widgetsThatRequireFixedWindow = (0, _from2.default)(widgets).some(function (el) {
var widget = el.widget;
var isFixed = _this.fixedScreenConstraints[widget] && _this.fixedScreenConstraints[widget](_this.windowWidth, _this.getCurrentWidget());
var index = _this.widgets.indexOf(el);
_this.widgets[index] = (0, _assign2.default)(el, { fixed: isFixed });
return isFixed;
});
if (!widgetsThatRequireFixedWindow) {
this._removeFixedContainer();
} else {
this._addFixedContainer();
}
}
/**
* @private
*/
}, {
key: '_addFixedContainer',
value: function _addFixedContainer() {
var _this2 = this;
if (this.isFixedWindowActive) {
return;
}
_Event2.default.dispatchAndFire(global.document, EVENT_BEFORE_FIXED_ADD, {
detail: this.getCurrentWidget()
});
// this causes layout and should be optimized
// At lest we write in a batch later
_Settings2.default.get().scrollbarUpdateNodes.map(function (n) {
var foundProperty = 'paddingRight';
var direction = 1;
var node = n;
if (n instanceof Array) {
var _n = (0, _slicedToArray3.default)(n, 3),
whatNode = _n[0],
property = _n[1],
d = _n[2];
foundProperty = property;
node = whatNode;
direction = d || 1;
}
return {
node: node,
property: foundProperty,
value: parseInt(global.getComputedStyle(node)[foundProperty], 10) + (!node.__fixedWindowMod__ ? _Settings2.default.getScrollbarWidth() * direction : 0) + 'px'
};
}).forEach(function (d) {
d.node.__fixedWindowMod__ = true;
d.node.style[d.property] = d.value;
});
this.touchListener = function (e) {
e.preventDefault();
};
var shouldNotMoveUp = false;
var shouldNotMoveDown = false;
var neverScroll = false;
var lastClientY = 0;
this.touchStartListener = function (e) {
var _getLastFixedWidget = _this2.getLastFixedWidget(),
element = _getLastFixedWidget.element;
var closestOverflow = _Util2.default.closestCallback(e.target, function (el) {
return el instanceof HTMLTextAreaElement || el.hasAttribute && el.hasAttribute(ALLOW_ELEMENT_OVERFLOW_TOUCH);
});
if (closestOverflow && closestOverflow.scrollHeight !== closestOverflow.offsetHeight) {
element = closestOverflow;
}
if (_Util2.default.isPartOfNode(e.target, element)) {
neverScroll = element.scrollHeight === element.offsetHeight;
lastClientY = e.touches[0].clientY;
// never allow scrolling when there is nothing to scroll
if (neverScroll) {
return false;
}
if (element.scrollTop === 0) {
shouldNotMoveUp = true;
} else if (element.scrollHeight === element.scrollTop + element.offsetHeight) {
shouldNotMoveDown = true;
}
}
};
global.addEventListener('touchmove', this.touchListener);
global.document.body.addEventListener('touchstart', this.touchStartListener);
this.touchMoveListener = function (e) {
var _getLastFixedWidget2 = _this2.getLastFixedWidget(),
element = _getLastFixedWidget2.element;
if (_Util2.default.isPartOfNode(e.target, element)) {
var clientY = e.touches[0].clientY;
var isScrollingDown = lastClientY - clientY > 0;
lastClientY = clientY;
if (neverScroll) {
return false;
}
if (!shouldNotMoveDown && isScrollingDown || shouldNotMoveDown && !isScrollingDown || !shouldNotMoveDown && !shouldNotMoveUp && !isScrollingDown || shouldNotMoveDown && shouldNotMoveUp && isScrollingDown) {
e.stopImmediatePropagation();
}
}
};
this.touchEndListener = function () {
neverScroll = false;
shouldNotMoveUp = false;
shouldNotMoveDown = false;
lastClientY = 0;
};
global.document.body.addEventListener('touchmove', this.touchMoveListener);
global.document.body.addEventListener('touchend', this.touchEndListener);
global.document.documentElement.classList.add(CLS_FIXED_WINDOW);
this.isFixedWindowActive = true;
}
/**
* @private
*/
}, {
key: '_removeFixedContainer',
value: function _removeFixedContainer() {
if (this.isFixedWindowActive) {
// cleanup event listeners
global.removeEventListener('touchmove', this.touchListener);
global.document.body.removeEventListener('touchstart', this.touchStartListener);
global.document.body.removeEventListener('touchmove', this.touchMoveListener);
global.document.body.removeEventListener('touchend', this.touchEndListener);
// reset scrollbar nodes
_Settings2.default.get().scrollbarUpdateNodes.forEach(function (node) {
if (node instanceof Array) {
var _node = (0, _slicedToArray3.default)(node, 2),
whatNode = _node[0],
property = _node[1];
delete whatNode.__fixedWindowMod__;
whatNode.style[property] = '';
} else {
delete node.__fixedWindowMod__;
node.style.paddingRight = '';
}
});
global.document.documentElement.classList.remove(CLS_FIXED_WINDOW);
_Event2.default.dispatchAndFire(global.document, EVENT_AFTER_FIXED_REMOVE);
this.isFixedWindowActive = false;
}
}
/**
* Will close a window when no widgets are opened that need one
*/
}, {
key: 'resizeListener',
value: function resizeListener() {
this.windowWidth = global.innerWidth;
this._checkFixedNeeded();
}
/**
* @returns {FixedWindow}
*/
}, {
key: 'close',
/**
* Request a close of the fixed window
*/
value: function close() {
this.widgets.pop();
this._checkFixedNeeded();
if (this.widgets.length === 0) {
this._removeFixedContainer();
}
}
/**
* Request to open a fixed windows
* @param {Object|DestroyableWidget} instance
* @param {HTMLElement} element
*/
}, {
key: 'open',
value: function open(instance, element) {
var fixed = false;
Eif ((typeof instance === 'undefined' ? 'undefined' : (0, _typeof3.default)(instance)) === 'object') {
var widget = instance.constructor;
var fixedWidget = this.fixedScreenConstraints[instance.constructor];
Iif (widget && fixedWidget) {
fixed = fixedWidget(this.windowWidth, instance);
}
this.widgets.push({
widget: widget,
element: element,
fixed: fixed
});
// open a new window if there is no window active
Iif (!this.isFixedWindowActive && fixed) {
this._addFixedContainer();
}
}
}
}], [{
key: 'getInstance',
value: function getInstance() {
if (!fixedWindowInstance) {
fixedWindowInstance = new FixedWindow();
fixedWindowInstance.windowWidth = global.innerWidth;
var eventHandler = fixedWindowInstance.resizeListener.bind(fixedWindowInstance);
global.addEventListener('resize', (0, _debounce2.default)(eventHandler, 500));
global.addEventListener('orientationchange', eventHandler);
}
return fixedWindowInstance;
}
}]);
return FixedWindow;
}();
exports.default = FixedWindow;
|