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488 lines
16 KiB
Markdown
488 lines
16 KiB
Markdown
---
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Title: Viewer component
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Added: v2.0.0
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Status: Active
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Last reviewed: 2019-01-16
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---
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# [Viewer component](../../lib/core/viewer/components/viewer.component.ts "Defined in viewer.component.ts")
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Displays content from an ACS repository.
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See it live: [Viewer Quickstart](https://embed.plnkr.co/iTuG1lFIXfsP95l6bDW6/)
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## Contents
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- [Basic usage](#basic-usage)
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- [Transclusions](#transclusions)
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- [Class members](#class-members)
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- [Properties](#properties)
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- [Events](#events)
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- [Keyboard shortcuts](#keyboard-shortcuts)
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- [Details](#details)
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- [Integrating with the Document List component](#integrating-with-the-document-list-component)
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- [Custom file parameters](#custom-file-parameters)
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- [Supported file formats](#supported-file-formats)
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- [Content Renditions](#content-renditions)
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- [Configuring PDF.js library](#configuring-pdfjs-library)
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- [Extending the Viewer](#extending-the-viewer)
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- [Custom layout](#custom-layout)
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- [Printing](#printing)
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- [See also](#see-also)
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## Basic usage
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Using with node id:
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```html
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<adf-viewer
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[showViewer]="true"
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[overlayMode]="true"
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[nodeId]="'d367023a-7ebe-4f3a-a7d0-4f27c43f1045'">
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</adf-viewer>
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```
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Using with file url:
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```html
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<adf-viewer
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[overlayMode]="true"
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[urlFile]="'filename.pdf'">
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</adf-viewer>
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```
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Using with shared link:
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```html
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<adf-viewer
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[overlayMode]="true"
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[sharedLinkId]="'WWDg_afiTU6lHEgr4fAbQA'">
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</adf-viewer>
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```
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Note that if you have a URL which contains a shared link ID, you should extract the
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ID portion and use it with the `sharedLinkId` property rather than using the whole
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URL with `urlFile`.
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### [Transclusions](../user-guide/transclusion.md)
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The [Viewer component](../core/viewer.component.md) lets you transclude content for the toolbar (and toolbar buttons),
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the sidebar, thumbnails, and the "Open with" and "More actions" menus.
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See the [Custom layout](#custom-layout) section for full details of all available tranclusions.
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## Class members
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### Properties
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| Name | Type | Default value | Description |
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| ---- | ---- | ------------- | ----------- |
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| allowDownload | `boolean` | true | Toggles downloading. |
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| allowFullScreen | `boolean` | true | Toggles the 'Full Screen' feature. |
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| allowGoBack | `boolean` | true | Allows `back` navigation |
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| allowLeftSidebar | `boolean` | false | Allow the left the sidebar. |
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| allowNavigate | `boolean` | false | Toggles before/next navigation. You can use the arrow buttons to navigate between documents in the collection. |
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| allowPrint | `boolean` | false | Toggles printing. |
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| allowRightSidebar | `boolean` | false | Allow the right sidebar. |
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| allowThumbnails | `boolean` | true | Toggles PDF thumbnails. |
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| blobFile | [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob) | | Loads a [Blob](https://developer.mozilla.org/en-US/docs/Web/API/Blob) File |
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| canNavigateBefore | `boolean` | true | Toggles the "before" ("<") button. Requires `allowNavigate` to be enabled. |
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| canNavigateNext | `boolean` | true | Toggles the next (">") button. Requires `allowNavigate` to be enabled. |
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| displayName | `string` | | Specifies the name of the file when it is not available from the URL. |
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| fileName | `string` | | Content filename. |
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| maxRetries | `number` | 10 | Number of times the Viewer will retry fetching content Rendition. There is a delay of at least one second between attempts. |
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| mimeType | `string` | | MIME type of the file content (when not determined by the filename extension). |
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| nodeId | `string` | null | Node Id of the file to load. |
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| overlayMode | `boolean` | false | If `true` then show the Viewer as a full page over the current content. Otherwise fit inside the parent div. |
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| sharedLinkId | `string` | null | Shared link id (to display shared file). |
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| showLeftSidebar | `boolean` | false | Toggles left sidebar visibility. Requires `allowLeftSidebar` to be set to `true`. |
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| showRightSidebar | `boolean` | false | Toggles right sidebar visibility. Requires `allowRightSidebar` to be set to `true`. |
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| showToolbar | `boolean` | true | Hide or show the toolbar |
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| showViewer | `boolean` | true | Hide or show the viewer |
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| sidebarLeftTemplate | [`TemplateRef`](https://angular.io/api/core/TemplateRef)`<any>` | null | The template for the left sidebar. The template context contains the loaded node data. |
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| sidebarRightTemplate | [`TemplateRef`](https://angular.io/api/core/TemplateRef)`<any>` | null | The template for the right sidebar. The template context contains the loaded node data. |
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| thumbnailsTemplate | [`TemplateRef`](https://angular.io/api/core/TemplateRef)`<any>` | null | The template for the pdf thumbnails. |
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| urlFile | `string` | "" | If you want to load an external file that does not come from ACS you can use this URL to specify where to load the file from. |
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| urlFileViewer | `string` | null | Viewer to use with the `urlFile` address (`pdf`, `image`, `media`, `text`). Used when `urlFile` has no filename and extension. |
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### Events
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| Name | Type | Description |
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| ---- | ---- | ----------- |
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| extensionChange | [`EventEmitter`](https://angular.io/api/core/EventEmitter)`<string>` | Emitted when the filename extension changes. |
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| goBack | [`EventEmitter`](https://angular.io/api/core/EventEmitter)`<`[`BaseEvent`](../../lib/core/events/base.event.ts)`<any>>` | Emitted when user clicks the 'Back' button. |
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| invalidSharedLink | [`EventEmitter`](https://angular.io/api/core/EventEmitter)`<Object>` | Emitted when the shared link used is not valid. |
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| navigateBefore | [`EventEmitter`](https://angular.io/api/core/EventEmitter)`<Object>` | Emitted when user clicks 'Navigate Before' ("<") button. |
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| navigateNext | [`EventEmitter`](https://angular.io/api/core/EventEmitter)`<Object>` | Emitted when user clicks 'Navigate Next' (">") button. |
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| print | [`EventEmitter`](https://angular.io/api/core/EventEmitter)`<`[`BaseEvent`](../../lib/core/events/base.event.ts)`<any>>` | Emitted when user clicks the 'Print' button. |
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| showViewerChange | [`EventEmitter`](https://angular.io/api/core/EventEmitter)`<boolean>` | Emitted when the viewer is shown or hidden. |
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## Keyboard shortcuts
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| Name | Description |
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| ---- | ----------- |
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| Esc | Close the viewer (overlay mode only). |
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| Left | Invoke 'Navigate before' action. |
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| Right | Invoke 'Navigate next' action. |
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| Ctrl+F | Activate full-screen mode. |
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## Details
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### Integrating with the Document List component
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Below is the most simple integration of the Viewer and
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[Document List](../content-services/document-list.component.md) components within your custom component:
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```html
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<adf-document-list
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currentFolderId="-my-"
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(preview)="showPreview($event)">
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</adf-document-list>
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<adf-viewer
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[(showViewer)]="showViewer"
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[overlayMode]="true"
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[nodeId]="nodeId">
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</adf-viewer>
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```
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The component controller class implementation might look like the following:
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```ts
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export class OverlayViewerComponent {
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@Input()
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showViewer: boolean = false;
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nodeId: string;
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showPreview(event) {
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if (event.value.entry.isFile) {
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this.nodeId = event.value.entry.id;
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this.showViewer = true;
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}
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}
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}
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```
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### Custom file parameters
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You can provide custom file parameters, for example a value for the `mimeType` or `displayName` when using URL values that have no file names or extensions:
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```html
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<adf-viewer
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[displayName]="fileName"
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[allowGoBack]="false"
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[mimeType]="mimeType"
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[urlFile]="fileUrl">
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</adf-viewer>
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```
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### Supported file formats
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The [Viewer component](../core/viewer.component.md) consists of separate Views that handle particular types or type families based on either a file extension or a mime type:
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- PDF View
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- application/pdf
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- \*.pdf
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- Image View
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- image/png
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- image/jpeg
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- image/gif
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- image/bmp
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- image/svg+xml
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- \*.png
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- \*.jpg
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- \*.jpeg
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- \*.gif
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- \*.bpm
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- \*.svg
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- Text View
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- text/plain
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- text/csv
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- text/xml
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- text/html
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- application/x-javascript
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- \*.txt
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- \*.xml
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- \*.js
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- \*.html
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- \*.json
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- \*.ts
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- Media View
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- video/mp4
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- video/webm
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- video/ogg
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- audio/mpeg
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- audio/ogg
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- audio/wav
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- \*.wav
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- \*.mp4
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- \*.mp3
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- \*.webm
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- \*.ogg
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### Content Renditions
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For those extensions and mime types that cannot be natively displayed in the browser, the Viewer will try to fetch the corresponding rendition using the [renditions service api](https://community.alfresco.com/docs/DOC-5879-rendition-service).
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For the full list of supported types please refer to: [File types that support preview and thumbnail generation](http://docs.alfresco.com/5.2/references/valid-transformations-preview.html).
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### Configuring PDF.js library
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Configure your webpack-enabled application with the PDF.js library as follows.
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1. Install pdfjs-dist
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```sh
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npm install pdfjs-dist
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```
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2. Update `vendors.ts` by appending the following code. This will enable the [viewer component](../core/viewer.component.md)
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and compatibility mode for all browsers. It will also configure the web worker for the PDF.js
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library to render PDF files in the background:
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```ts
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// PDF.js
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require('pdfjs-dist/web/compatibility.js');
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const pdfjsLib = require('pdfjs-dist');
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pdfjsLib.PDFJS.workerSrc = './pdf.worker.js';
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require('pdfjs-dist/web/pdf_viewer.js');
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```
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3. Update the `plugins` section of the `webpack.common.js` file with the following lines:
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```js
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new CopyWebpackPlugin([
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...
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{
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from: 'node_modules/pdfjs-dist/build/pdf.worker.js',
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to: 'pdf.worker.js'
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}
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])
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```
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The [Viewer component](../core/viewer.component.md) now should be able to display PDF files.
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### Extending the Viewer
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You can define your own custom handler to handle other file formats that are not yet supported by
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the [Viewer component](../core/viewer.component.md). Below is an example that shows how to use the `adf-viewer-extension`
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to handle 3D data files:
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```html
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<adf-viewer [nodeId]="nodeId">
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<adf-viewer-extension [supportedExtensions]="['obj','3ds']" #extension>
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<ng-template let-urlFileContent="urlFileContent" let-extension="extension">
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<threed-viewer
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[urlFile]="urlFileContent"
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[extension]="extension">
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</threed-viewer>
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</ng-template>
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</adf-viewer-extension>
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</adf-viewer>
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```
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Note: you need to add the `ng2-3d-editor` dependency to your `package.json` file to make the example above work.
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You can define multiple `adf-viewer-extension` templates if required:
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```html
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<adf-viewer [nodeId]="nodeId">
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<adf-viewer-extension [supportedExtensions]="['xls','xlsx']" #extension>
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<ng-template let-urlFileContent="urlFileContent">
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<my-custom-xls-component
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urlFileContent="urlFileContent">
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</my-custom-xls-component>
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</ng-template>
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</adf-viewer-extension>
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<adf-viewer-extension [supportedExtensions]="['txt']" #extension>
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<ng-template let-urlFileContent="urlFileContent" >
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<my-custom-txt-component
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urlFileContent="urlFileContent">
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</my-custom-txt-component>
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</ng-template>
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</adf-viewer-extension>
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</adf-viewer>
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```
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### Custom layout
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The [Viewer component](../core/viewer.component.md) lets you transclude custom content in several different places as
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explained in the sections below.
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#### Custom toolbar
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You can replace the standard viewer toolbar with your own custom implementation:
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```html
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<adf-viewer>
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<adf-viewer-toolbar>
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<h1>toolbar</h1>
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</adf-viewer-toolbar>
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</adf-viewer>
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```
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Everything you put inside the "adf-viewer-toolbar" tags will be rendered instead of the
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standard toolbar.
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#### Custom toolbar buttons
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If you are happy with the custom toolbar's behaviour but want to add some extra buttons
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then you can do so as shown in the following example:
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```html
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<adf-viewer>
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<adf-viewer-toolbar-actions>
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<button mat-icon-button>
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<mat-icon>alarm</mat-icon>
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</button>
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<button mat-icon-button>
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<mat-icon>backup</mat-icon>
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</button>
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<button mat-icon-button>
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<mat-icon>bug_report</mat-icon>
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</button>
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</adf-viewer-toolbar-actions>
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</adf-viewer>
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```
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The result should look like this:
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#### Custom sidebar
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The [Viewer component](../core/viewer.component.md) also supports custom sidebar components and layouts.
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Set the `allowRightSidebar` property to `true` to enable this feature.
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The custom sidebar can be injected in two different ways. The first way is to use
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transclusion, which will display all content placed inside the `<adf-viewer-sidebar>` element:
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```html
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<adf-viewer [allowRightSidebar]="true">
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<adf-viewer-sidebar>
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<h1>My info</h1>
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</adf-viewer-sidebar>
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</adf-viewer>
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```
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The second way to customize the sidebar is to use template injection but note that this only works
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when using the viewer with `nodeId`.
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```html
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<ng-template let-node="node" #sidebarTemplate>
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<adf-content-metadata-card [node]="node"></adf-content-metadata-card>
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</ng-template>
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<adf-viewer [allowRightSidebar]="true" [sidebarRightTemplate]="sidebarTemplate"></adf-viewer>
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```
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#### Custom thumbnails
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The PDF viewer comes with its own default list of thumbnails but you can replace this
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by providing a custom template and binding to the context property `viewer` to access the PDFJS.PDFViewer
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instance.
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Provide the custom template as in the following example:
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```javascript
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import { Component, Input } from '@angular/core';
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@Component({
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selector: 'custom-thumbnails',
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template: '<p> Custom Thumbnails Component </p>'
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})
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export class CustomThumbnailsComponent {
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@Input() pdfViewer: any;
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...
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}
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```
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```html
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<ng-template #customThumbnailsTemplate let-pdfViewer="viewer">
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<custom-thumbnails [pdfViewer]="pdfViewer"></custom-thumbnails>
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</ng-template>
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<adf-viewer [thumbnailsTemplate]="customThumbnailsTemplate"></adf-viewer>
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```
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#### Custom "Open With" menu
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You can enable a custom "Open With" menu by providing at least one action inside the
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`adf-viewer-open-with` tag:
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```html
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<adf-viewer [nodeId]="nodeId">
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<adf-viewer-open-with>
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<button mat-menu-item>
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<mat-icon>dialpad</mat-icon>
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<span>Option 1</span>
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</button>
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<button mat-menu-item disabled>
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<mat-icon>voicemail</mat-icon>
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<span>Option 2</span>
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</button>
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<button mat-menu-item>
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<mat-icon>notifications_off</mat-icon>
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<span>Option 3</span>
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</button>
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</adf-viewer-open-with>
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</adf-viewer>
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```
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#### Custom "More actions" menu
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You can enable a custom "More actions" menu by providing at least one action inside the `adf-viewer-more-actions` tag:
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```html
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<adf-viewer [nodeId]="nodeId">
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<adf-viewer-more-actions>
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<button mat-menu-item>
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<mat-icon>dialpad</mat-icon>
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<span>Action One</span>
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</button>
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<button mat-menu-item disabled>
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<mat-icon>voicemail</mat-icon>
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<span>Action Two</span>
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</button>
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<button mat-menu-item>
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<mat-icon>notifications_off</mat-icon>
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<span>Action Three</span>
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</button>
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</adf-viewer-more-actions>
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</adv-viewer>
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```
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### Printing
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You can configure the Viewer to let the user print the displayed content. The
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component will show a "Print" button if the `allowPrint` property is set to
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true.
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```html
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<adf-viewer [allowPrint]="true">
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...
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</adf-viewer>
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```
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You can also use the `print` event to get notification when the user prints some
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content.
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## See also
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- [Document List component](../content-services/document-list.component.md)
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