ant-design-vue/components/upload/utils.tsx
tangjinzhou 04baae5a57
Refactor upload (#5290)
* refactor: vc-upload

* refactor: vc-upload

* refactor: upload

* refactor: upload

* refactor: upload
2022-02-24 09:58:58 +08:00

116 lines
3.4 KiB
Vue

import type { FileType, UploadFile, InternalUploadFile } from './interface';
export function file2Obj(file: FileType): InternalUploadFile {
return {
...file,
lastModified: file.lastModified,
lastModifiedDate: file.lastModifiedDate,
name: file.name,
size: file.size,
type: file.type,
uid: file.uid,
percent: 0,
originFileObj: file,
};
}
/** Upload fileList. Replace file if exist or just push into it. */
export function updateFileList(file: UploadFile<any>, fileList: UploadFile<any>[]) {
const nextFileList = [...fileList];
const fileIndex = nextFileList.findIndex(({ uid }: UploadFile) => uid === file.uid);
if (fileIndex === -1) {
nextFileList.push(file);
} else {
nextFileList[fileIndex] = file;
}
return nextFileList;
}
export function getFileItem(file: FileType, fileList: UploadFile[]) {
const matchKey = file.uid !== undefined ? 'uid' : 'name';
return fileList.filter(item => item[matchKey] === file[matchKey])[0];
}
export function removeFileItem(file: UploadFile, fileList: UploadFile[]) {
const matchKey = file.uid !== undefined ? 'uid' : 'name';
const removed = fileList.filter(item => item[matchKey] !== file[matchKey]);
if (removed.length === fileList.length) {
return null;
}
return removed;
}
// ==================== Default Image Preview ====================
const extname = (url = '') => {
const temp = url.split('/');
const filename = temp[temp.length - 1];
const filenameWithoutSuffix = filename.split(/#|\?/)[0];
return (/\.[^./\\]*$/.exec(filenameWithoutSuffix) || [''])[0];
};
const isImageFileType = (type: string): boolean => type.indexOf('image/') === 0;
export const isImageUrl = (file: UploadFile): boolean => {
if (file.type && !file.thumbUrl) {
return isImageFileType(file.type);
}
const url: string = (file.thumbUrl || file.url || '') as string;
const extension = extname(url);
if (
/^data:image\//.test(url) ||
/(webp|svg|png|gif|jpg|jpeg|jfif|bmp|dpg|ico)$/i.test(extension)
) {
return true;
}
if (/^data:/.test(url)) {
// other file types of base64
return false;
}
if (extension) {
// other file types which have extension
return false;
}
return true;
};
const MEASURE_SIZE = 200;
export function previewImage(file: File | Blob): Promise<string> {
return new Promise(resolve => {
if (!file.type || !isImageFileType(file.type)) {
resolve('');
return;
}
const canvas = document.createElement('canvas');
canvas.width = MEASURE_SIZE;
canvas.height = MEASURE_SIZE;
canvas.style.cssText = `position: fixed; left: 0; top: 0; width: ${MEASURE_SIZE}px; height: ${MEASURE_SIZE}px; z-index: 9999; display: none;`;
document.body.appendChild(canvas);
const ctx = canvas.getContext('2d');
const img = new Image();
img.onload = () => {
const { width, height } = img;
let drawWidth = MEASURE_SIZE;
let drawHeight = MEASURE_SIZE;
let offsetX = 0;
let offsetY = 0;
if (width > height) {
drawHeight = height * (MEASURE_SIZE / width);
offsetY = -(drawHeight - drawWidth) / 2;
} else {
drawWidth = width * (MEASURE_SIZE / height);
offsetX = -(drawWidth - drawHeight) / 2;
}
ctx!.drawImage(img, offsetX, offsetY, drawWidth, drawHeight);
const dataURL = canvas.toDataURL();
document.body.removeChild(canvas);
resolve(dataURL);
};
img.src = window.URL.createObjectURL(file);
});
}