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import buildModuleUrl from "../Core/buildModuleUrl.js";
import Check from "../Core/Check.js";
import Credit from "../Core/Credit.js";
import defined from "../Core/defined.js";
import destroyObject from "../Core/destroyObject.js";
import Uri from "urijs";
const mobileWidth = 576;
const lightboxHeight = 100;
const textColor = "#ffffff";
const highlightColor = "#48b";
/**
* Used to sort the credits by frequency of appearance
* when they are later displayed.
*
* @alias CreditDisplay.CreditDisplayElement
* @constructor
*
* @private
*/
function CreditDisplayElement(credit, count) {
this.credit = credit;
this.count = count ?? 1;
}
function contains(credits, credit) {
const len = credits.length;
for (let i = 0; i < len; i++) {
const existingCredit = credits[i];
if (Credit.equals(existingCredit, credit)) {
return true;
}
}
return false;
}
function swapCesiumCredit(creditDisplay) {
// We don't want to clutter the screen with the Cesium logo and the Cesium ion
// logo at the same time. Since the ion logo is required, we just replace the
// Cesium logo or add the logo if the Cesium one was removed.
const previousCredit = creditDisplay._previousCesiumCredit;
const currentCredit = creditDisplay._currentCesiumCredit;
if (Credit.equals(currentCredit, previousCredit)) {
return;
}
Iif (defined(previousCredit)) {
creditDisplay._cesiumCreditContainer.removeChild(previousCredit.element);
}
Eif (defined(currentCredit)) {
creditDisplay._cesiumCreditContainer.appendChild(currentCredit.element);
}
creditDisplay._previousCesiumCredit = currentCredit;
}
const delimiterClassName = "cesium-credit-delimiter";
function createDelimiterElement(delimiter) {
const delimiterElement = document.createElement("span");
delimiterElement.textContent = delimiter;
delimiterElement.className = delimiterClassName;
return delimiterElement;
}
function createCreditElement(element, elementWrapperTagName) {
// may need to wrap the credit in another element
if (defined(elementWrapperTagName)) {
const wrapper = document.createElement(elementWrapperTagName);
wrapper._creditId = element._creditId;
wrapper.appendChild(element);
element = wrapper;
}
return element;
}
function displayCredits(container, credits, delimiter, elementWrapperTagName) {
const childNodes = container.childNodes;
let domIndex = -1;
// Sort the credits such that more frequent credits appear first
credits.sort(function (credit1, credit2) {
return credit2.count - credit1.count;
});
for (let creditIndex = 0; creditIndex < credits.length; ++creditIndex) {
const credit = credits[creditIndex].credit;
Eif (defined(credit)) {
domIndex = creditIndex;
if (defined(delimiter)) {
// credits may be separated by delimiters
domIndex *= 2;
if (creditIndex > 0) {
const delimiterDomIndex = domIndex - 1;
if (childNodes.length <= delimiterDomIndex) {
container.appendChild(createDelimiterElement(delimiter));
} else {
const existingDelimiter = childNodes[delimiterDomIndex];
Iif (existingDelimiter.className !== delimiterClassName) {
container.replaceChild(
createDelimiterElement(delimiter),
existingDelimiter,
);
}
}
}
}
const element = credit.element;
// check to see if the correct credit is in the right place
if (childNodes.length <= domIndex) {
container.appendChild(
createCreditElement(element, elementWrapperTagName),
);
} else {
const existingElement = childNodes[domIndex];
if (existingElement._creditId !== credit._id) {
// not the right credit, swap it in
container.replaceChild(
createCreditElement(element, elementWrapperTagName),
existingElement,
);
}
}
}
}
// any remaining nodes in the container are unnecessary
++domIndex;
while (domIndex < childNodes.length) {
container.removeChild(childNodes[domIndex]);
}
}
function styleLightboxContainer(that) {
const lightboxCredits = that._lightboxCredits;
const width = that.viewport.clientWidth;
const height = that.viewport.clientHeight;
if (width !== that._lastViewportWidth) {
Iif (width < mobileWidth) {
lightboxCredits.className =
"cesium-credit-lightbox cesium-credit-lightbox-mobile";
lightboxCredits.style.marginTop = "0";
} else {
lightboxCredits.className =
"cesium-credit-lightbox cesium-credit-lightbox-expanded";
lightboxCredits.style.marginTop = `${Math.floor(
(height - lightboxCredits.clientHeight) * 0.5,
)}px`;
}
that._lastViewportWidth = width;
}
if (width >= mobileWidth && height !== that._lastViewportHeight) {
lightboxCredits.style.marginTop = `${Math.floor(
(height - lightboxCredits.clientHeight) * 0.5,
)}px`;
that._lastViewportHeight = height;
}
}
function appendCss(container) {
const style = /*css*/ `
.cesium-credit-lightbox-overlay {
display: none;
z-index: 1;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: rgba(80, 80, 80, 0.8);
}
.cesium-credit-lightbox {
background-color: #303336;
color: ${textColor};
position: relative;
min-height: ${lightboxHeight}px;
margin: auto;
}
.cesium-credit-lightbox > ul > li a,
.cesium-credit-lightbox > ul > li a:visited,
.cesium-credit-wrapper a,
.cesium-credit-wrapper a:visited {
color: ${textColor};
}
.cesium-credit-lightbox > ul > li a:hover {
color: ${highlightColor};
}
.cesium-credit-lightbox.cesium-credit-lightbox-expanded {
border: 1px solid #444;
border-radius: 5px;
max-width: 470px;
}
.cesium-credit-lightbox.cesium-credit-lightbox-mobile {
height: 100%;
width: 100%;
}
.cesium-credit-lightbox-title {
padding: 20px 20px 0 20px;
}
.cesium-credit-lightbox-close {
font-size: 18pt;
cursor: pointer;
position: absolute;
top: 0;
right: 6px;
color: ${textColor};
}
.cesium-credit-lightbox-close:hover {
color: ${highlightColor};
}
.cesium-credit-lightbox > ul {
margin: 0;
padding: 12px 20px 12px 40px;
font-size: 13px;
}
.cesium-credit-lightbox > ul > li {
padding-bottom: 6px;
}
.cesium-credit-lightbox > ul > li * {
padding: 0;
margin: 0;
}
.cesium-credit-expand-link {
padding-left: 5px;
cursor: pointer;
text-decoration: underline;
color: ${textColor};
}
.cesium-credit-expand-link:hover {
color: ${highlightColor};
}
.cesium-credit-text {
color: ${textColor};
}
.cesium-credit-delimiter {
padding: 0 5px;
}
.cesium-credit-textContainer *,
.cesium-credit-logoContainer * {
display: inline;
}
.cesium-credit-textContainer a:hover {
color: ${highlightColor}
}
.cesium-credit-textContainer .cesium-credit-wrapper:first-of-type {
padding-left: 5px;
}
`;
function getShadowRoot(container) {
Iif (container.shadowRoot) {
return container.shadowRoot;
}
Eif (container.getRootNode) {
const root = container.getRootNode();
if (root instanceof ShadowRoot) {
return root;
}
}
return undefined;
}
const shadowRootOrDocumentHead = getShadowRoot(container) ?? document.head;
const styleElem = document.createElement("style");
styleElem.innerHTML = style;
shadowRootOrDocumentHead.appendChild(styleElem);
}
/**
* The credit display is responsible for displaying credits on screen.
*
* @param {HTMLElement} container The HTML element where credits will be displayed
* @param {string} [delimiter= '•'] The string to separate text credits
* @param {HTMLElement} [viewport=document.body] The HTML element that will contain the credits popup
*
* @alias CreditDisplay
* @constructor
*
* @example
* // Add a credit with a tooltip, image and link to display onscreen
* const credit = new Cesium.Credit(`<a href="https://cesium.com/" target="_blank"><img src="/images/cesium_logo.png" title="Cesium"/></a>`, true);
* viewer.creditDisplay.addStaticCredit(credit);
*
* @example
* // Add a credit with a plaintext link to display in the lightbox
* const credit = new Cesium.Credit('<a href="https://cesium.com/" target="_blank">Cesium</a>');
* viewer.creditDisplay.addStaticCredit(credit);
*/
function CreditDisplay(container, delimiter, viewport) {
//>>includeStart('debug', pragmas.debug);
Check.defined("container", container);
//>>includeEnd('debug');
const that = this;
viewport = viewport ?? document.body;
const lightbox = document.createElement("div");
lightbox.className = "cesium-credit-lightbox-overlay";
viewport.appendChild(lightbox);
const lightboxCredits = document.createElement("div");
lightboxCredits.className = "cesium-credit-lightbox";
lightbox.appendChild(lightboxCredits);
function hideLightbox(event) {
if (lightboxCredits.contains(event.target)) {
return;
}
that.hideLightbox();
}
lightbox.addEventListener("click", hideLightbox, false);
const title = document.createElement("div");
title.className = "cesium-credit-lightbox-title";
title.textContent = "Data provided by:";
lightboxCredits.appendChild(title);
const closeButton = document.createElement("a");
closeButton.onclick = this.hideLightbox.bind(this);
closeButton.innerHTML = "×";
closeButton.className = "cesium-credit-lightbox-close";
lightboxCredits.appendChild(closeButton);
const creditList = document.createElement("ul");
lightboxCredits.appendChild(creditList);
const cesiumCreditContainer = document.createElement("div");
cesiumCreditContainer.className = "cesium-credit-logoContainer";
cesiumCreditContainer.style.display = "inline";
container.appendChild(cesiumCreditContainer);
const screenContainer = document.createElement("div");
screenContainer.className = "cesium-credit-textContainer";
screenContainer.style.display = "inline";
container.appendChild(screenContainer);
const expandLink = document.createElement("a");
expandLink.className = "cesium-credit-expand-link";
expandLink.onclick = this.showLightbox.bind(this);
expandLink.textContent = "Data attribution";
container.appendChild(expandLink);
appendCss(container);
const cesiumCredit = Credit.clone(CreditDisplay.cesiumCredit);
this._delimiter = delimiter ?? "•";
this._screenContainer = screenContainer;
this._cesiumCreditContainer = cesiumCreditContainer;
this._lastViewportHeight = undefined;
this._lastViewportWidth = undefined;
this._lightboxCredits = lightboxCredits;
this._creditList = creditList;
this._lightbox = lightbox;
this._hideLightbox = hideLightbox;
this._expandLink = expandLink;
this._expanded = false;
this._staticCredits = [];
this._cesiumCredit = cesiumCredit;
this._previousCesiumCredit = undefined;
this._currentCesiumCredit = cesiumCredit;
this._creditDisplayElementPool = [];
this._creditDisplayElementIndex = 0;
this._currentFrameCredits = {
screenCredits: new AssociativeArray(),
lightboxCredits: new AssociativeArray(),
};
this._defaultCredit = undefined;
this.viewport = viewport;
/**
* The HTML element where credits will be displayed.
* @type {HTMLElement}
*/
this.container = container;
}
function setCredit(creditDisplay, credits, credit, count) {
count = count ?? 1;
let creditDisplayElement = credits.get(credit.id);
if (!defined(creditDisplayElement)) {
const pool = creditDisplay._creditDisplayElementPool;
const poolIndex = creditDisplay._creditDisplayElementPoolIndex;
if (poolIndex < pool.length) {
creditDisplayElement = pool[poolIndex];
creditDisplayElement.credit = credit;
creditDisplayElement.count = count;
} else {
creditDisplayElement = new CreditDisplayElement(credit, count);
pool.push(creditDisplayElement);
}
++creditDisplay._creditDisplayElementPoolIndex;
credits.set(credit.id, creditDisplayElement);
} else Eif (creditDisplayElement.count < Number.MAX_VALUE) {
creditDisplayElement.count += count;
}
}
/**
* Adds a {@link Credit} that will show on screen or in the lightbox until
* the next frame. This is mostly for internal use. Use {@link CreditDisplay.addStaticCredit} to add a persistent credit to the screen.
*
* @see CreditDisplay.addStaticCredit
*
* @param {Credit} credit The credit to display in the next frame.
*/
CreditDisplay.prototype.addCreditToNextFrame = function (credit) {
//>>includeStart('debug', pragmas.debug);
Check.defined("credit", credit);
//>>includeEnd('debug');
Iif (credit.isIon()) {
// If this is the an ion logo credit from the ion server
// Just use the default credit (which is identical) to avoid blinking
if (!defined(this._defaultCredit)) {
this._defaultCredit = Credit.clone(getDefaultCredit());
}
this._currentCesiumCredit = this._defaultCredit;
return;
}
let credits;
if (!credit.showOnScreen) {
credits = this._currentFrameCredits.lightboxCredits;
} else {
credits = this._currentFrameCredits.screenCredits;
}
setCredit(this, credits, credit);
};
/**
* Adds a {@link Credit} that will show on screen or in the lightbox until removed with {@link CreditDisplay.removeStaticCredit}.
*
* @param {Credit} credit The credit to added
*
* @example
* // Add a credit with a tooltip, image and link to display onscreen
* const credit = new Cesium.Credit(`<a href="https://cesium.com/" target="_blank"><img src="/images/cesium_logo.png" title="Cesium"/></a>`, true);
* viewer.creditDisplay.addStaticCredit(credit);
*
* @example
* // Add a credit with a plaintext link to display in the lightbox
* const credit = new Cesium.Credit('<a href="https://cesium.com/" target="_blank">Cesium</a>');
* viewer.creditDisplay.addStaticCredit(credit);
*/
CreditDisplay.prototype.addStaticCredit = function (credit) {
//>>includeStart('debug', pragmas.debug);
Check.defined("credit", credit);
//>>includeEnd('debug');
const staticCredits = this._staticCredits;
if (!contains(staticCredits, credit)) {
staticCredits.push(credit);
}
};
/**
* Removes a static credit shown on screen or in the lightbox.
*
* @param {Credit} credit The credit to be removed.
*/
CreditDisplay.prototype.removeStaticCredit = function (credit) {
//>>includeStart('debug', pragmas.debug);
Check.defined("credit", credit);
//>>includeEnd('debug');
const staticCredits = this._staticCredits;
const index = staticCredits.indexOf(credit);
Eif (index !== -1) {
staticCredits.splice(index, 1);
}
};
/**
* @private
*/
CreditDisplay.prototype.showLightbox = function () {
this._lightbox.style.display = "block";
this._expanded = true;
};
/**
* @private
*/
CreditDisplay.prototype.hideLightbox = function () {
this._lightbox.style.display = "none";
this._expanded = false;
};
/**
* Updates the credit display before a new frame is rendered.
*/
CreditDisplay.prototype.update = function () {
if (this._expanded) {
styleLightboxContainer(this);
}
};
/**
* Resets the credit display to a beginning of frame state, clearing out current credits.
*/
CreditDisplay.prototype.beginFrame = function () {
const currentFrameCredits = this._currentFrameCredits;
this._creditDisplayElementPoolIndex = 0;
const screenCredits = currentFrameCredits.screenCredits;
const lightboxCredits = currentFrameCredits.lightboxCredits;
screenCredits.removeAll();
lightboxCredits.removeAll();
const staticCredits = this._staticCredits;
for (let i = 0; i < staticCredits.length; ++i) {
const staticCredit = staticCredits[i];
const creditCollection = staticCredit.showOnScreen
? screenCredits
: lightboxCredits;
Iif (
staticCredit.isIon() &&
Credit.equals(CreditDisplay.cesiumCredit, this._cesiumCredit)
) {
// If this is an ion logo credit from the ion server,
// make sure to de-duplicate with the default ion credit
continue;
}
setCredit(this, creditCollection, staticCredit, Number.MAX_VALUE);
}
if (!Credit.equals(CreditDisplay.cesiumCredit, this._cesiumCredit)) {
this._cesiumCredit = Credit.clone(CreditDisplay.cesiumCredit);
}
this._currentCesiumCredit = this._cesiumCredit;
};
/**
* Sets the credit display to the end of frame state, displaying credits from the last frame in the credit container.
*/
CreditDisplay.prototype.endFrame = function () {
const screenCredits = this._currentFrameCredits.screenCredits.values;
displayCredits(
this._screenContainer,
screenCredits,
this._delimiter,
undefined,
);
const lightboxCredits = this._currentFrameCredits.lightboxCredits.values;
this._expandLink.style.display =
lightboxCredits.length > 0 ? "inline" : "none";
displayCredits(this._creditList, lightboxCredits, undefined, "li");
swapCesiumCredit(this);
};
/**
* Destroys the resources held by this object. Destroying an object allows for deterministic
* release of resources, instead of relying on the garbage collector to destroy this object.
* <br /><br />
* Once an object is destroyed, it should not be used; calling any function other than
* <code>isDestroyed</code> will result in a {@link DeveloperError} exception. Therefore,
* assign the return value (<code>undefined</code>) to the object as done in the example.
*
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
*/
CreditDisplay.prototype.destroy = function () {
this._lightbox.removeEventListener("click", this._hideLightbox, false);
this.container.removeChild(this._cesiumCreditContainer);
this.container.removeChild(this._screenContainer);
this.container.removeChild(this._expandLink);
this.viewport.removeChild(this._lightbox);
return destroyObject(this);
};
/**
* Returns true if this object was destroyed; otherwise, false.
* <br /><br />
*
* @returns {boolean} <code>true</code> if this object was destroyed; otherwise, <code>false</code>.
*/
CreditDisplay.prototype.isDestroyed = function () {
return false;
};
CreditDisplay._cesiumCredit = undefined;
CreditDisplay._cesiumCreditInitialized = false;
let defaultCredit;
function getDefaultCredit() {
if (!defined(defaultCredit)) {
let logo = buildModuleUrl("Assets/Images/ion-credit.png");
// When hosting in a WebView, the base URL scheme is file:// or ms-appx-web://
// which is stripped out from the Credit's <img> tag; use the full path instead
Iif (
logo.indexOf("http://") !== 0 &&
logo.indexOf("https://") !== 0 &&
logo.indexOf("data:") !== 0
) {
const logoUrl = new Uri(logo);
logo = logoUrl.path();
}
defaultCredit = new Credit(
`<a href="https://cesium.com/" target="_blank"><img src="${logo}" style="vertical-align: -7px" title="Cesium ion"/></a>`,
true,
);
}
if (!CreditDisplay._cesiumCreditInitialized) {
CreditDisplay._cesiumCredit = defaultCredit;
CreditDisplay._cesiumCreditInitialized = true;
}
return defaultCredit;
}
Object.defineProperties(CreditDisplay, {
/**
* Gets or sets the Cesium logo credit.
* @memberof CreditDisplay
* @type {Credit}
*/
cesiumCredit: {
get: function () {
getDefaultCredit();
return CreditDisplay._cesiumCredit;
},
set: function (value) {
CreditDisplay._cesiumCredit = value;
CreditDisplay._cesiumCreditInitialized = true;
},
},
});
CreditDisplay.CreditDisplayElement = CreditDisplayElement;
export default CreditDisplay;
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