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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | 1x 1x 11x 11x 1x 1x 1x 11x 1x 12x 12x 1x 12x 1x 11x 10x 8x 8x 7x 10x 1x | import { getIsSelectingOrUnselecting, retrieveStringFromParsedTable } from './tableSelectionUtils';
import type {
IEditor,
PluginEvent,
EditorPlugin,
DOMSelection,
} from 'roosterjs-content-model-types';
/**
* AnnouncePlugin helps editor announce table selection changes for accessibility
*/
export class AnnouncePlugin implements EditorPlugin {
private editor: IEditor | null = null;
private previousSelection: DOMSelection | null = null;
/**
* Get name of this plugin
*/
getName() {
return 'Announce';
}
/**
* The first method that editor will call to a plugin when editor is initializing.
* It will pass in the editor instance, plugin should take this chance to save the
* editor reference so that it can call to any editor method or format API later.
* @param editor The editor object
*/
initialize(editor: IEditor) {
this.editor = editor;
}
/**
* The last method that editor will call to a plugin before it is disposed.
* Plugin can take this chance to clear the reference to editor. After this method is
* called, plugin should not call to any editor method since it will result in error.
*/
dispose() {
this.editor = null;
this.previousSelection = null;
}
/**
* Core method for a plugin. Once an event happens in editor, editor will call this
* method of each plugin to handle the event as long as the event is not handled
* exclusively by another plugin.
* @param event The event to handle:
*/
onPluginEvent(event: PluginEvent) {
if (!this.editor) {
return;
}
if (event.eventType == 'selectionChanged') {
if (event.newSelection?.type == 'table') {
const action = getIsSelectingOrUnselecting(
this.previousSelection?.type == 'table' ? this.previousSelection : null,
event.newSelection
);
if (action && event.newSelection.tableSelectionInfo) {
this.editor.announce({
defaultStrings: action === 'unselecting' ? 'unselected' : 'selected',
formatStrings: [
retrieveStringFromParsedTable(event.newSelection.tableSelectionInfo),
],
});
}
}
this.previousSelection = event.newSelection;
}
}
}
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