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browser.utils.ts
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browser.utils.ts
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/**
* @returns {window}
*/
import * as ScrollEvent from "./messages/ScrollEvent";
import ICoords = ScrollEvent.ICoords;
export function getWindow() {
return window;
}
/**
* @returns {HTMLDocument}
*/
export function getDocument() {
return document;
}
/**
* Get the current x/y position crossbow
* @returns {{x: *, y: *}}
*/
export function getBrowserScrollPosition(window, document): ICoords {
let scrollX;
let scrollY;
const dElement = document.documentElement;
const dBody = document.body;
if (window.pageYOffset !== undefined) {
scrollX = window.pageXOffset;
scrollY = window.pageYOffset;
} else {
scrollX = dElement.scrollLeft || dBody.scrollLeft || 0;
scrollY = dElement.scrollTop || dBody.scrollTop || 0;
}
return {
x: scrollX,
y: scrollY
};
}
/**
* @returns {{x: number, y: number}}
*/
export function getDocumentScrollSpace(
document: Document
): ScrollEvent.ICoords {
const dElement = document.documentElement;
const dBody = document.body;
return {
x: dBody.scrollHeight - dElement.clientWidth,
y: dBody.scrollHeight - dElement.clientHeight
};
}
/**
* Saves scroll position into cookies
*/
export function saveScrollPosition(window, document) {
const pos = getBrowserScrollPosition(window, document);
document.cookie = "bs_scroll_pos=" + [pos.x, pos.y].join(",");
}
/**
* Restores scroll position from cookies
*/
export function restoreScrollPosition() {
const pos = getDocument()
.cookie.replace(
/(?:(?:^|.*;\s*)bs_scroll_pos\s*\=\s*([^;]*).*$)|^.*$/,
"$1"
)
.split(",");
getWindow().scrollTo(Number(pos[0]), Number(pos[1]));
}
/**
* @param tagName
* @param elem
* @returns {*|number}
*/
export function getElementIndex(tagName, elem) {
var allElems = getDocument().getElementsByTagName(tagName);
return Array.prototype.indexOf.call(allElems, elem);
}
/**
* Force Change event on radio & checkboxes (IE)
*/
export function forceChange(elem) {
elem.blur();
elem.focus();
}
/**
* @param elem
* @returns {{tagName: (elem.tagName|*), index: *}}
*/
export function getElementData(elem) {
var tagName = elem.tagName;
var index = getElementIndex(tagName, elem);
return {
tagName: tagName,
index: index
};
}
/**
* @param {string} tagName
* @param {number} index
*/
export function getSingleElement(tagName, index) {
var elems = getDocument().getElementsByTagName(tagName);
return elems[index];
}
/**
* Get the body element
*/
export function getBody() {
return getDocument().getElementsByTagName("body")[0];
}
/**
* @param {{x: number, y: number}} pos
*/
export function setScroll(pos) {
getWindow().scrollTo(pos.x, pos.y);
}
/**
* Hard reload
*/
export function reloadBrowser() {
getWindow().location.reload(true);
}
/**
* Foreach polyfill
* @param coll
* @param fn
*/
export function forEach(coll, fn) {
for (var i = 0, n = coll.length; i < n; i += 1) {
fn(coll[i], i, coll);
}
}
/**
* Are we dealing with old IE?
* @returns {boolean}
*/
export function isOldIe() {
return typeof getWindow().attachEvent !== "undefined";
}
/**
* Split the URL information
* @returns {object}
*/
export function getLocation(url) {
const location = getDocument().createElement("a");
location.href = url;
if (location.host === "") {
location.href = location.href;
}
return location;
}
/**
* @param {String} val
* @returns {boolean}
*/
export function isUndefined(val) {
return "undefined" === typeof val;
}
/**
* @param obj
* @param path
*/
export function getByPath(obj, path) {
for (
var i = 0, tempPath = path.split("."), len = tempPath.length;
i < len;
i++
) {
if (!obj || typeof obj !== "object") {
return false;
}
obj = obj[tempPath[i]];
}
if (typeof obj === "undefined") {
return false;
}
return obj;
}
export function getScrollPosition(
window: Window,
document: Document
): ScrollEvent.Data {
const pos = getBrowserScrollPosition(window, document);
return {
raw: pos, // Get px of x and y axis of scroll
proportional: getScrollTopPercentage(pos, document) // Get % of y axis of scroll
};
}
export function getScrollPositionForElement(
element: HTMLElement
): ScrollEvent.Data {
const raw: ICoords = {
x: element.scrollLeft,
y: element.scrollTop
};
const scrollSpace: ICoords = {
x: element.scrollWidth,
y: element.scrollHeight
};
return {
raw, // Get px of x and y axis of scroll
proportional: getScrollPercentage(scrollSpace, raw).y // Get % of y axis of scroll
};
}
export function getScrollTopPercentage(pos, document): number {
const scrollSpace = getDocumentScrollSpace(document);
const percentage = getScrollPercentage(scrollSpace, pos);
return percentage.y;
}
export function getScrollPercentage(
scrollSpace: ICoords,
scrollPosition: ICoords
): ICoords {
const x = scrollPosition.x / scrollSpace.x;
const y = scrollPosition.y / scrollSpace.y;
return {
x: x || 0,
y: y
};
}