@greg-md/ng-facebook
Version:
Using Facebook SDK with Angular.
132 lines (131 loc) • 11.8 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes} checked by tsc
*/
/**
* @param {?} element
* @return {?}
*/
export function offset(element) {
// Support: IE <=11 only
// Running getBoundingClientRect on a
// disconnected node in IE throws an error
if (!element || !element.getClientRects().length) {
return { top: 0, left: 0 };
}
let /** @type {?} */ docElem, /** @type {?} */ rect, /** @type {?} */ doc;
rect = element.getBoundingClientRect();
// Make sure element is not hidden (display: none)
if (rect.width || rect.height) {
doc = element.ownerDocument;
docElem = doc.documentElement;
return {
top: rect.top + window.pageYOffset - docElem.clientTop,
left: rect.left + window.pageXOffset - docElem.clientLeft
};
}
// Return zeros for disconnected and hidden elements (gh-2310)
return rect;
}
/**
* @record
*/
export function ViewportSettings() { }
function ViewportSettings_tsickle_Closure_declarations() {
/** @type {?|undefined} */
ViewportSettings.prototype.container;
/** @type {?|undefined} */
ViewportSettings.prototype.threshold;
}
/**
* @param {?} element
* @param {?=} settings
* @return {?}
*/
export function aboveTheTop(element, settings = {}) {
if (!element) {
return false;
}
let /** @type {?} */ fold;
const /** @type {?} */ container = settings.container || window, /** @type {?} */
threshold = settings.threshold || 0;
if (container instanceof HTMLElement) {
fold = offset(container).top;
}
else {
fold = window.scrollY;
}
return fold >= (offset(element).top + threshold + element.offsetHeight);
}
/**
* @param {?} element
* @param {?=} settings
* @return {?}
*/
export function rightOfFold(element, settings = {}) {
if (!element) {
return false;
}
let /** @type {?} */ fold;
const /** @type {?} */ container = settings.container || window, /** @type {?} */
threshold = settings.threshold || 0;
if (container instanceof HTMLElement) {
fold = offset(container).left + container.offsetWidth;
}
else {
fold = window.innerWidth + window.scrollX;
}
return fold <= offset(element).left - threshold;
}
/**
* @param {?} element
* @param {?=} settings
* @return {?}
*/
export function belowTheFold(element, settings = {}) {
if (!element) {
return false;
}
let /** @type {?} */ fold;
const /** @type {?} */ container = settings.container || window, /** @type {?} */
threshold = settings.threshold || 0;
if (container instanceof HTMLElement) {
fold = offset(container).top + container.offsetHeight;
}
else {
fold = window.innerHeight + window.scrollY;
}
return fold <= offset(element).top - threshold;
}
/**
* @param {?} element
* @param {?=} settings
* @return {?}
*/
export function leftOfBegin(element, settings = {}) {
if (!element) {
return false;
}
let /** @type {?} */ fold;
const /** @type {?} */ container = settings.container || window, /** @type {?} */
threshold = settings.threshold || 0;
if (container instanceof HTMLElement) {
fold = offset(container).left;
}
else {
fold = window.scrollX;
}
return fold >= offset(element).left + threshold + element.offsetWidth;
}
/**
* @param {?} element
* @param {?=} settings
* @return {?}
*/
export function inViewport(element, settings = {}) {
return !belowTheFold(element, settings)
&& !aboveTheTop(element, settings)
&& !leftOfBegin(element, settings)
&& !rightOfFold(element, settings);
}
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docElem.clientTop,\n      left: rect.left + window.pageXOffset - docElem.clientLeft\n    };\n  }\n\n  // Return zeros for disconnected and hidden elements (gh-2310)\n  return rect;\n}\n\nexport interface ViewportSettings {\n  container?: HTMLElement | Window;\n  threshold?: number;\n}\n\nexport function aboveTheTop(element: HTMLElement, settings: ViewportSettings = {}) {\n  if (!element) {\n    return false;\n  }\n\n  let fold: number;\n\n  const container = settings.container || window,\n    threshold = settings.threshold || 0;\n\n  if (container instanceof HTMLElement) {\n    fold = offset(container).top;\n  } else {\n    fold = window.scrollY;\n  }\n\n  return fold >= (offset(element).top + threshold + element.offsetHeight);\n}\n\nexport function rightOfFold(element: HTMLElement, settings: ViewportSettings = {}) {\n  if (!element) {\n    return false;\n  }\n\n  let fold: number;\n\n  const container = settings.container || window,\n    threshold = settings.threshold || 0;\n\n  if (container instanceof HTMLElement) {\n    fold = offset(container).left + container.offsetWidth;\n  } else {\n    fold = window.innerWidth + window.scrollX;\n  }\n\n  return fold <= offset(element).left - threshold;\n}\n\nexport function belowTheFold(element: HTMLElement, settings: ViewportSettings = {}) {\n  if (!element) {\n    return false;\n  }\n\n  let fold: number;\n\n  const container = settings.container || window,\n    threshold = settings.threshold || 0;\n\n  if (container instanceof HTMLElement) {\n    fold = offset(container).top + container.offsetHeight;\n  } else {\n    fold = window.innerHeight + window.scrollY;\n  }\n\n  return fold <= offset(element).top - threshold;\n}\n\nexport function leftOfBegin(element: HTMLElement, settings: ViewportSettings = {}) {\n  if (!element) {\n    return false;\n  }\n\n  let fold: number;\n\n  const container = settings.container || window,\n    threshold = settings.threshold || 0;\n\n  if (container instanceof HTMLElement) {\n    fold = offset(container).left;\n  } else {\n    fold = window.scrollX;\n  }\n\n  return fold >= offset(element).left + threshold + element.offsetWidth;\n}\n\nexport function inViewport(element: HTMLElement, settings: ViewportSettings = {}) {\n  return !belowTheFold(element, settings)\n    && !aboveTheTop(element, settings)\n    && !leftOfBegin(element, settings)\n    && !rightOfFold(element, settings);\n}\n"]}