123 lines
3.9 KiB
JavaScript
123 lines
3.9 KiB
JavaScript
import _toConsumableArray from "@babel/runtime/helpers/esm/toConsumableArray";
|
|
export function file2Obj(file) {
|
|
return Object.assign(Object.assign({}, 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, fileList) {
|
|
const nextFileList = _toConsumableArray(fileList);
|
|
const fileIndex = nextFileList.findIndex(_ref => {
|
|
let {
|
|
uid
|
|
} = _ref;
|
|
return uid === file.uid;
|
|
});
|
|
if (fileIndex === -1) {
|
|
nextFileList.push(file);
|
|
} else {
|
|
nextFileList[fileIndex] = file;
|
|
}
|
|
return nextFileList;
|
|
}
|
|
export function getFileItem(file, fileList) {
|
|
const matchKey = file.uid !== undefined ? 'uid' : 'name';
|
|
return fileList.filter(item => item[matchKey] === file[matchKey])[0];
|
|
}
|
|
export function removeFileItem(file, fileList) {
|
|
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 = function () {
|
|
let url = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';
|
|
const temp = url.split('/');
|
|
const filename = temp[temp.length - 1];
|
|
const filenameWithoutSuffix = filename.split(/#|\?/)[0];
|
|
return (/\.[^./\\]*$/.exec(filenameWithoutSuffix) || [''])[0];
|
|
};
|
|
const isImageFileType = type => type.indexOf('image/') === 0;
|
|
export const isImageUrl = file => {
|
|
if (file.type && !file.thumbUrl) {
|
|
return isImageFileType(file.type);
|
|
}
|
|
const url = file.thumbUrl || file.url || '';
|
|
const extension = extname(url);
|
|
if (/^data:image\//.test(url) || /(webp|svg|png|gif|jpg|jpeg|jfif|bmp|dpg|ico|heic|heif)$/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) {
|
|
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);
|
|
window.URL.revokeObjectURL(img.src);
|
|
resolve(dataURL);
|
|
};
|
|
img.crossOrigin = 'anonymous';
|
|
if (file.type.startsWith('image/svg+xml')) {
|
|
const reader = new FileReader();
|
|
reader.onload = () => {
|
|
if (reader.result) img.src = reader.result;
|
|
};
|
|
reader.readAsDataURL(file);
|
|
} else if (file.type.startsWith('image/gif')) {
|
|
const reader = new FileReader();
|
|
reader.onload = () => {
|
|
if (reader.result) resolve(reader.result);
|
|
};
|
|
reader.readAsDataURL(file);
|
|
} else {
|
|
img.src = window.URL.createObjectURL(file);
|
|
}
|
|
});
|
|
} |