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DataUrl.ts
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DataUrl.ts
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/**
* *****************************************************
*/
export class DataUrl {
private static PROTO_TOKEN: string = 'data:';
private static ENCODING_TOKEN: string = ';base64,';
private _mimeType: string;
private _data: string;
public static createDataUrl(mimeType: string, encodedData: string): string {
return DataUrl.PROTO_TOKEN + mimeType + DataUrl.ENCODING_TOKEN + encodedData;
}
public static getMimeType(dataUrl: string): string {
const startIndex: number = dataUrl.indexOf(':');
const endIndex: number = dataUrl.indexOf(';');
if (startIndex > -1 && endIndex > startIndex) {
return dataUrl.substring(startIndex + 1, endIndex);
}
}
public static getEncodedData(dataUrl: string): string {
const startIndex: number = dataUrl.indexOf(',');
if (startIndex > -1) {
return dataUrl.substring(startIndex + 1);
}
}
constructor(dataUrl: string) {
this._mimeType = DataUrl.getMimeType(dataUrl);
this._data = DataUrl.getEncodedData(dataUrl);
}
get mimeType(): string {
return this._mimeType;
}
get data(): string {
return this._data;
}
}