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| ## Chrome Service | ||
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| - [About!](#about-) | ||
| - [Nav Controls Service](#navcontrolsservice-) | ||
| - [Nav Links Service](#navlinksservice-) | ||
| - [Recently Accessed Service](#recentlyaccessedservice-) | ||
| - [Doc Title Service](#doctitleservice-) | ||
| - [UI](#ui-) | ||
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| ## About : | ||
| - **Signature** - `export interface ChromeStart` | ||
| The chrome service is a high level UI service that is part of CoreStart (Core services exposed to the Plugin start lifecycle) and offers other plugins a way to add navigation controls to the UI, edit the document title, manipuate navlinks on global header as well as edit the recent accessed tab. It consists of these sub-services/components. | ||
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| - NavControlsService : for registering new controls to be displayed in the navigation bar. | ||
| - NavLinksService : for manipulating nav links. | ||
| - RecentlyAccessedService : for recently accessed history. | ||
| - DocTitleService: for accessing and updating the document title | ||
| - UI : All the UI components,icons e.g. header, loaders. | ||
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| - How to access ? add in interface `chrome: ChromeStart && chrome.servicesName => e.g chrome.docTitle.method` | ||
| - Where it is getting Registered/Executed ? [Staring Point](https://github.com/opensearch-project/OpenSearch-Dashboards/blob/2.1/src/core/public/rendering/rendering_service.tsx) | ||
| - How header component is getting rendered ? `const chromeUi = chrome.getHeaderComponent(); ` | ||
| - Chrome Methods </b> [See chrome interface/methods](https://github.com/opensearch-project/OpenSearch-Dashboards/blob/2.1/src/core/public/chrome/chrome_service.tsx) | ||
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| ### NavControlsService : | ||
| - Interface : ChromeNavControls | ||
| - **Signature** - `navControls: ChromeNavControls` | ||
| - Registering new controller | ||
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| Example : | ||
| Register a left-side nav control rendered with React. | ||
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| ```jsx | ||
| chrome.navControls.registerLeft({ | ||
| mount(targetDomElement) { | ||
| ReactDOM.mount(<MyControl />, targetDomElement); | ||
| return () => ReactDOM.unmountComponentAtNode(targetDomElement); | ||
| } | ||
| }) | ||
| ``` | ||
| ### NavLinksService : | ||
| - Interface : ChromeNavLinks | ||
| - **Signature** - `navLinks: ChromeNavLinks` | ||
| - e.g. Method : | ||
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| Get an observable for a sorted list of navlinks :- | ||
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| `getNavLinks$(): Observable<Array<Readonly<ChromeNavLink>>>` | ||
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| Get the state of a navlink at this point in time :- | ||
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| `get(id: string): ChromeNavLink | undefined` | ||
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| Get the current state of all navlinks :- | ||
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| `getAll(): Array<Readonly<ChromeNavLink>>` | ||
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| Check whether or not a navlink exists :- | ||
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| `has(id: string): boolean` | ||
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| Remove all navlinks except the one matching the given id :- | ||
| `showOnly(id: string): void` | ||
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| - How to access | ||
| ###### Get the current state of all navlinks: | ||
| `core.chrome.navLinks.getAll()` | ||
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| ###### Get the state of a navlink at this point in time: | ||
| `core.chrome.navLinks.get()` | ||
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| ### RecentlyAccessedService : | ||
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| - Interface : ChromeRecentlyAccessed | ||
| - Signature : ```recentlyAccessed: ChromeRecentlyAccessed``` | ||
| - The Recently viewed items are stored in the browser's local storage. | ||
| - You can go back to the recent search/visualization/dashboard , each item has (link,label,id) | ||
| - Methods : | ||
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| Adds a new item to the recently accessed history :- | ||
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| `add(link: string, label: string, id: string): void` | ||
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| Gets an Array of the current recently accessed history :- | ||
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| `get(): ChromeRecentlyAccessedHistoryItem[]` | ||
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| Gets an Observable of the array of recently accessed history :- | ||
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| `get$(): Observable<ChromeRecentlyAccessedHistoryItem[]>` | ||
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| - How to access | ||
| ###### Adds a new item to the recently accessed history : | ||
| ` | ||
| chrome.recentlyAccessed.add('/app/map/1234', 'Map 1234', '1234'); | ||
| ` | ||
| ###### Gets an Array of the current recently accessed history : | ||
| ` | ||
| chrome.recentlyAccessed.get().forEach(console.log);; | ||
| ` | ||
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| ### DocTitleService : | ||
| - Interface : ChromeDocTitle | ||
| - **Signature** - `docTitle: ChromeDocTitle` | ||
| ###### - How to change the title of the document | ||
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| ```ts | ||
| chrome.docTitle.change('My application title') | ||
| chrome.docTitle.change(['My application', 'My section']) | ||
| ``` | ||
| ### UI : | ||
| ###### consists of tsx/scss files && renders UI components from css Library e.g ```<Progress props={props}>``` | ||
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| ###### Adding/overriding existing css : | ||
| - Create scss file and define class e.g .osdCustomClass{} | ||
| - pass className prop to UI component. | ||
| e.g `<HeaderBreadcrumbs className="osdCustomClass"/> ` | ||
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| ###### UI Components : | ||
| - HeaderBreadcrumbs : Props | ||
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| - responsive:boolean Hides extra (above the max) breadcrumbs under a collapsed item as the window gets smaller. | ||
| - max: Collapses the inner items past the maximum set here into a single ellipses item. | ||
| - breadcrumbs : The array of individual Breadcrumb items | ||
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