gristlabs_grist-core/app/client/widgets/AttachmentsWidget.ts

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import {CellValue} from "app/common/DocActions";
import * as commands from 'app/client/components/commands';
import {dragOverClass} from 'app/client/lib/dom';
import {selectFiles, uploadFiles} from 'app/client/lib/uploads';
import {cssRow} from 'app/client/ui/RightPanelStyles';
import {colors, testId, theme, vars} from 'app/client/ui2018/cssVars';
import {NewAbstractWidget} from 'app/client/widgets/NewAbstractWidget';
import {encodeQueryParams} from 'app/common/gutil';
import {ViewFieldRec} from 'app/client/models/entities/ViewFieldRec';
import {DataRowModel} from 'app/client/models/DataRowModel';
import {MetaTableData} from 'app/client/models/TableData';
import { SingleCell } from 'app/common/TableData';
import {KoSaveableObservable} from 'app/client/models/modelUtil';
import {UploadResult} from 'app/common/uploads';
import { GristObjCode } from 'app/plugin/GristData';
import {Computed, dom, fromKo, input, onElem, styled} from 'grainjs';
import {extname} from 'path';
/**
* AttachmentsWidget - A widget for displaying attachments as image previews.
*/
export class AttachmentsWidget extends NewAbstractWidget {
private _attachmentsTable: MetaTableData<'_grist_Attachments'>;
private _height: KoSaveableObservable<string>;
constructor(field: ViewFieldRec) {
super(field);
// TODO: the Attachments table currently treated as metadata, and loaded on open,
// but should probably be loaded on demand as it contains user data, which may be large.
this._attachmentsTable = this._getDocData().getMetaTable('_grist_Attachments');
this._height = this.options.prop('height');
this.autoDispose(this._height.subscribe(() => {
this.field.viewSection().events.trigger('rowHeightChange');
}));
}
public buildDom(row: DataRowModel) {
// NOTE: A cellValue of the correct type includes the list encoding designator 'L' as the
// first element.
const cellValue = row.cells[this.field.colId()];
const values = Computed.create(null, fromKo(cellValue), (use, _cellValue) =>
Array.isArray(_cellValue) ? _cellValue.slice(1) as number[] : []);
const colId = this.field.colId();
const tableId = this.field.column().table().tableId();
return cssAttachmentWidget(
dom.autoDispose(values),
dom.cls('field_clip'),
dragOverClass('attachment_drag_over'),
cssAttachmentIcon(
cssAttachmentIcon.cls('-hover', (use) => use(values).length > 0),
dom.on('click', () => this._selectAndSave(row, cellValue)),
testId('attachment-icon'),
),
dom.maybe<number>(row.id, rowId => {
return dom.forEach(values, (value: number) =>
isNaN(value) ? null : this._buildAttachment(value, values, {
rowId, colId, tableId,
}));
}),
dom.on('drop', ev => this._uploadAndSave(row, cellValue, ev.dataTransfer!.files)),
testId('attachment-widget'),
);
}
public buildConfigDom(): Element {
const options = this.field.config.options;
const height = options.prop('height');
const inputRange = input(
fromKo(height),
{onInput: true}, {
style: 'margin: 0 5px;',
type: 'range',
min: '16',
max: '96',
value: '36'
},
testId('pw-thumbnail-size'),
// When multiple columns are selected, we can only edit height when all
// columns support it.
dom.prop('disabled', use => use(options.disabled('height'))),
);
// Save the height on change event (when the user releases the drag button)
onElem(inputRange, 'change', (ev: Event) => {
height.setAndSave(inputRange.value).catch(reportError);
});
return cssRow(
cssSizeLabel('Size'),
inputRange
);
}
protected _buildAttachment(value: number, allValues: Computed<number[]>, cell: SingleCell): Element {
const filename = this._attachmentsTable.getValue(value, 'fileName')!;
const fileIdent = this._attachmentsTable.getValue(value, 'fileIdent')!;
const height = this._attachmentsTable.getValue(value, 'imageHeight')!;
const width = this._attachmentsTable.getValue(value, 'imageWidth')!;
const hasPreview = Boolean(height);
const ratio = hasPreview ? (width / height) : 1;
return cssAttachmentPreview({title: filename}, // Add a filename tooltip to the previews.
dom.style('height', (use) => `${use(this._height)}px`),
dom.style('width', (use) => `${parseInt(use(this._height), 10) * ratio}px`),
// TODO: Update to legitimately determine whether a file preview exists.
hasPreview ? dom('img', {style: 'height: 100%; min-width: 100%; vertical-align: top;'},
dom.attr('src', this._getUrl(value, cell))
) : renderFileType(filename, fileIdent, this._height),
// Open editor as if with input, using it to tell it which of the attachments to show. We
// pass in a 1-based index. Hitting a key opens the cell, and this approach allows an
// accidental feature of opening e.g. second attachment by hitting "2".
dom.on('dblclick', () => commands.allCommands.input.run(String(allValues.get().indexOf(value) + 1))),
testId('pw-thumbnail'),
);
}
// Returns the attachment download url.
private _getUrl(attId: number, cell: SingleCell): string {
const docComm = this._getDocComm();
return docComm.docUrl('attachment') + '?' + encodeQueryParams({
...docComm.getUrlParams(),
...cell,
attId,
name: this._attachmentsTable.getValue(attId, 'fileName')
});
}
private async _selectAndSave(row: DataRowModel, value: KoSaveableObservable<CellValue>): Promise<void> {
const uploadResult = await selectFiles({docWorkerUrl: this._getDocComm().docWorkerUrl,
multiple: true, sizeLimit: 'attachment'});
return this._save(row, value, uploadResult);
}
private async _uploadAndSave(row: DataRowModel, value: KoSaveableObservable<CellValue>,
files: FileList): Promise<void> {
const uploadResult = await uploadFiles(Array.from(files),
{docWorkerUrl: this._getDocComm().docWorkerUrl,
sizeLimit: 'attachment'});
return this._save(row, value, uploadResult);
}
private async _save(row: DataRowModel, value: KoSaveableObservable<CellValue>,
uploadResult: UploadResult|null
): Promise<void> {
if (!uploadResult) { return; }
const rowIds = await this._getDocComm().addAttachments(uploadResult.uploadId);
// Values should be saved with a leading "L" to fit Grist's list value encoding.
const formatted: CellValue = value() ? value() : [GristObjCode.List];
const newValue = (formatted as number[]).concat(rowIds) as CellValue;
// Move the cursor here (note that this may involve switching active section when dragging
// into a cell of an inactive section). Then send the 'input' command; it is normally used for
// key presses to open an editor; here the "typed text" is the new value. It is handled by
// AttachmentsEditor.skipEditor(), and makes the edit apply to editRow, which handles setting
// default values based on widget linking.
commands.allCommands.setCursor.run(row, this.field);
commands.allCommands.input.run(newValue);
}
}
export function renderFileType(fileName: string, fileIdent: string, height?: ko.Observable<string>): HTMLElement {
// Prepend 'x' to ensure we return the extension even if the basename is empty (e.g. ".xls").
// Take slice(1) to strip off the leading period.
const extension = extname('x' + fileName).slice(1) || extname('x' + fileIdent).slice(1) || '?';
return cssFileType(extension.toUpperCase(),
height && cssFileType.cls((use) => {
const size = parseFloat(use(height));
return size < 28 ? '-small' : size < 60 ? '-medium' : '-large';
}),
);
}
const cssAttachmentWidget = styled('div', `
display: flex;
flex-wrap: wrap;
white-space: pre-wrap;
&.attachment_drag_over {
outline: 2px dashed #ff9a00;
outline-offset: -2px;
}
`);
const cssAttachmentIcon = styled('div.glyphicon.glyphicon-paperclip', `
position: absolute;
top: 2px;
left: 5px;
padding: 2px;
background-color: ${theme.attachmentsCellIconBg};
color: ${theme.attachmentsCellIconFg};
border-radius: 2px;
border: none;
cursor: pointer;
box-shadow: 0 0 0 1px ${theme.cellEditorBg};
z-index: 1;
&:hover {
background-color: ${theme.attachmentsCellIconHoverBg};
}
&-hover {
display: none;
}
.${cssAttachmentWidget.className}:hover &-hover {
display: inline;
}
`);
const cssAttachmentPreview = styled('div', `
color: black;
background-color: white;
border: 1px solid #bbb;
margin: 0 2px 2px 0;
position: relative;
display: flex;
align-items: center;
justify-content: center;
z-index: 0;
&:hover {
border-color: ${theme.cursor};
}
`);
const cssSizeLabel = styled('div', `
color: ${theme.lightText};
margin-right: 9px;
`);
const cssFileType = styled('div', `
height: 100%;
width: 100%;
max-height: 80px;
max-width: 80px;
background-color: ${colors.slate};
display: flex;
align-items: center;
justify-content: center;
font-size: ${vars.mediumFontSize};
font-weight: bold;
color: white;
overflow: hidden;
&-small { font-size: ${vars.xxsmallFontSize}; }
&-medium { font-size: ${vars.smallFontSize}; }
&-large { font-size: ${vars.mediumFontSize}; }
`);