[ADF-1586] Added Content Services doc files (#2683)

docs/content-node-selector.component.md

@@ -0,0 +1,96 @@
+# Content Node Selector component
+
+Allows a user to select items from a Content Services repository.
+
+![Content Node Selector screenshot](docassets/images/ContentNodeSelector.png)
+
+## Basic Usage
+
+```ts
+import { MatDialog } from '@angular/material';
+ ...
+
+constructor(dialog: MatDialog ... ) {}
+
+openSelectorDialog() {
+    data: ContentNodeSelectorComponentData = {
+        title: "Choose an item",
+        currentFolderId: someFolderId,
+        select: new EventEmitter<MinimalNodeEntryEntity[]>()
+    };
+
+    this.dialog.open(
+        ContentNodeSelectorComponent,
+        {
+            data, panelClass: 'adf-content-node-selector-dialog',
+            width: '630px'
+        }
+    );
+
+    data.select.subscribe((selections: MinimalNodeEntryEntity[]) => {
+        // Use or store selection...
+
+        this.dialog.closeAll();
+    });
+}
+
+```
+
+### Properties
+
+| Name | Type | Default | Description |
+| --- | --- | --- | --- |
+| title | string | "" | Text shown at the top of the selector |
+| currentFolderId | string | null | Node ID of the folder currently listed |
+| rowFilter | RowFilter | null | Custom row filter function |
+| imageResolver | ImageResolver | null | Custom image resolver function |
+| pageSize | number | 10 | Number of items shown per page in the list |
+
+### Events
+
+| Name | Description |
+| --- | --- |
+| select | Emitted when the user has selected an item |
+
+## Details
+
+The Content Node Selector component works a lot like the standard File Open/Save
+dialog used by desktop applications except that it chooses items from a Content Services
+repository rather than the filesystem. For example, the
+[Document List component](document-list.component.md) uses a selector to choose the targets
+of Copy/Move actions (see the [Content Action component](content-action.component.md) for
+more information).
+
+Unlike most components, the Content Node Selector is typically shown in a dialog box
+rather than the main page. You can use the
+[Angular Material Dialog](https://material.angular.io/components/dialog/overview) for this,
+as shown in the usage example. ADF provides the `ContentNodeSelectorComponentData` interface
+to work with the Dialog's
+[data option](https://material.angular.io/components/dialog/overview#sharing-data-with-the-dialog-component-):
+
+```ts
+interface ContentNodeSelectorComponentData {
+    title: string;
+    currentFolderId?: string;
+    rowFilter?: RowFilter;
+    imageResolver?: ImageResolver;
+    select: EventEmitter<MinimalNodeEntryEntity[]>;
+}
+```
+
+### RowFilter and ImageResolver
+
+The Content Node Selector uses a [Document List](document-list.component.md) to display the
+items that the user can choose. As with the standard Document List, you can supply a custom
+**row filter** function (to hide items that can't be chosen) and a custom **image resolver**
+function (to select an image to show in a particular list cell). For example, you could use
+a row filter to hide document nodes in a folder selector. See the
+[Advanced Usage and Customization](document-list.component.md#advanced-usage-and-customization)
+section of the Document List page to learn how these functions are implemented.
+
+<!-- Don't edit the See also section. Edit seeAlsoGraph.json and run config/generateSeeAlso.js -->
+<!-- seealso start -->
+## See also
+
+- [Document list component](document-list.component.md)
+<!-- seealso end -->