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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 | 1x 1x 1x 1079x 1079x 1079x 1079x 1079x 1x 1024x 1024x 989x 989x 499x 490x 485x 1024x 1x 12x | import { validate } from './validate';
import type {
Definition,
ReadonlyContentModelWithDataset,
ShallowMutableContentModelWithDataset,
} from 'roosterjs-content-model-types';
const EditingInfoDatasetName = 'editingInfo';
/**
* Retrieve metadata from the given model.
* @param model The Content Model to retrieve metadata from
* @param definition Definition of this metadata type, used for validate the metadata object
* @returns Metadata of the model, or null if it does not contain a valid metadata
*/
export function getMetadata<T>(
model: ReadonlyContentModelWithDataset<T>,
definition?: Definition<T>
): T | null {
const metadataString = model.dataset[EditingInfoDatasetName];
let obj: Object | null = null;
try {
obj = JSON.parse(metadataString);
} catch {}
return !definition || validate(obj, definition) ? (obj as T) : null;
}
/**
* Update metadata of the given model
* @param model The model to update metadata to
* @param callback A callback function to update metadata
* @param definition @optional Metadata definition used for verify the metadata object
* @returns The metadata object if any, or null
*/
export function updateMetadata<T>(
model: ShallowMutableContentModelWithDataset<T>,
callback?: (metadata: T | null) => T | null,
definition?: Definition<T>
): T | null {
let obj = getMetadata(model, definition);
if (callback) {
obj = callback(obj);
if (!obj) {
delete model.dataset[EditingInfoDatasetName];
} else if (!definition || validate(obj, definition)) {
model.dataset[EditingInfoDatasetName] = JSON.stringify(obj);
}
}
return obj;
}
/**
* Check if the given model has metadata
* @param model The content model to check
*/
export function hasMetadata<T>(model: ReadonlyContentModelWithDataset<T> | HTMLElement): boolean {
return !!model.dataset[EditingInfoDatasetName];
}
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