gristlabs_grist-core/app/client/lib/tableUtil.js

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var _ = require('underscore');
var dom = require('./dom');
var gutil = require('app/common/gutil');
var {tsvEncode} = require('app/common/tsvFormat');
const G = require('../lib/browserGlobals').get('document', 'DOMParser');
/**
* Returns unique positions given upper and lower position. This function returns a suitable
* position number for the to-be-inserted element to end up at the given index.
* Inserting n elements between a and b should give the positions:
* (a+(b-a)/(n+1)), (a+2(b-a)/(n+1)) , ..., (a+(n)(b-a)/(n+1))
* @param {number} lowerPos - a lower bound
* @param {number} upperPos - an upper bound, must be greater than or equal to lowerPos
* @param {number} numInserts - Number of new positions to insert
* @returns {number[]} A sorted Array of unique positions bounded by lowerPos and upperPos.
* If neither an upper nor lowerPos is given, return 0, 1, ..., numInserts - 1
* If an upperPos is not given, return consecutive values greater than lowerPos
* If a lowerPos is not given, return consecutive values lower than upperPos
* Else return the avg position of to-be neighboring elements.
* Ex: insertPositions(null, 0, 4) = [1, 2, 3, 4]
* insertPositions(0, null, 4) = [-4, -3, -2, -1]
* insertPositions(0, 1, 4) = [0.2, 0.4, 0.6, 0.8]
*/
function insertPositions(lowerPos, upperPos, numInserts) {
numInserts = (typeof numInserts === 'undefined') ? 1 : numInserts;
var start;
var step = 1;
var positions = [];
if (typeof lowerPos !== 'number' && typeof upperPos !== 'number') {
start = 0;
} else if (typeof lowerPos !== 'number') {
start = upperPos - numInserts;
} else if (typeof upperPos !== 'number') {
start = lowerPos + 1;
} else {
step = (upperPos - lowerPos)/(numInserts + 1);
start = lowerPos + step;
}
for(var i = 0; i < numInserts; i++ ){
positions.push(start + step*i);
}
return positions;
}
exports.insertPositions = insertPositions;
/**
* Returns a sorted array of parentPos values between the parentPos of the viewField at index-1 and index.
* @param {koArray} viewFields - koArray of viewFields
* @{param} {number} index - index to insert the viewFields into
* @{param} {number} numInserts - number of new fields to insert
*/
function fieldInsertPositions(viewFields, index, numInserts) {
var leftPos = (index > 0) ? viewFields.at(index-1).parentPos() : null;
var rightPos = (index < viewFields.peekLength) ? viewFields.at(index).parentPos() : null;
return insertPositions(leftPos, rightPos, numInserts);
}
exports.fieldInsertPositions = fieldInsertPositions;
/**
* Returns tsv formatted values from TableData at the given rowIDs and columnIds.
* @param {TableData} tableData - the table containing the values to convert
* @param {CopySelection} selection - a CopySelection instance
* @return {String}
**/
function makePasteText(tableData, selection) {
// tsvEncode expects data as a 2-d array with each a array representing a row
// i.e. [["1-1", "1-2", "1-3"],["2-1", "2-2", "2-3"]]
const values = selection.rowIds.map(rowId =>
selection.columns.map(col => col.fmtGetter(rowId)));
return tsvEncode(values);
}
exports.makePasteText = makePasteText;
/**
* Returns an html table of containing the cells denoted by the cross product of
* the given rows and columns, styled by the given table/row/col style dictionaries.
* @param {TableData} tableData - the table containing the values denoted by the grid selection
* @param {CopySelection} selection - a CopySelection instance
* @param {Boolean} showColHeader - whether to include a column header row
* @return {String} The html for a table containing the given data.
**/
function makePasteHtml(tableData, selection, includeColHeaders) {
let rowStyle = selection.rowStyle || {}; // Maps rowId to style object.
let colStyle = selection.colStyle || {}; // Maps colId to style object.
let elem = dom('table', {border: '1', cellspacing: '0', style: 'white-space: pre'},
dom('colgroup', selection.colIds.map(colId =>
dom('col', {
style: _styleAttr(colStyle[colId]),
'data-grist-col-type': tableData.getColType(colId)
})
)),
// Include column headers if requested.
(includeColHeaders ?
dom('tr', selection.colIds.map(colId => dom('th', colId))) :
null
),
// Fill with table cells.
selection.rowIds.map(rowId =>
dom('tr',
{style: _styleAttr(rowStyle[rowId])},
selection.columns.map(col => {
let rawValue = col.rawGetter(rowId);
let fmtValue = col.fmtGetter(rowId);
let dataOptions = {};
if (rawValue !== fmtValue) {
dataOptions['data-grist-raw-value'] = JSON.stringify(rawValue);
}
return dom('td', dataOptions, fmtValue);
})
)
)
);
return elem.outerHTML;
}
exports.makePasteHtml = makePasteHtml;
/**
* @typedef RichPasteObject
* @type {object}
* @property {string} displayValue
* @property {string} [rawValue] - Optional rawValue that should be used if colType matches
* destination.
* @property {string} [colType] - Column type of the source column.
*/
/**
* Parses a 2-d array of objects from a text string containing an HTML table.
* @param {string} data - String of an HTML table.
* @return {Array<Array<RichPasteObj>>} - 2-d array of objects containing details of copied cells.
*/
function parsePasteHtml(data) {
let parser = new G.DOMParser();
let doc = parser.parseFromString(data, 'text/html');
let table = doc.querySelector('table');
let colTypes = Array.from(table.querySelectorAll('col'), col =>
col.getAttribute('data-grist-col-type'));
let result = Array.from(table.querySelectorAll('tr'), (row, rowIdx) =>
Array.from(row.querySelectorAll('td, th'), (cell, colIdx) => {
let o = { displayValue: cell.textContent };
// If there's a column type, add it to the object
if (colTypes[colIdx]) {
o.colType = colTypes[colIdx];
}
if (cell.hasAttribute('data-grist-raw-value')) {
o.rawValue = gutil.safeJsonParse(cell.getAttribute('data-grist-raw-value'),
o.displayValue);
}
return o;
}))
.filter((row) => (row.length > 0));
if (result.length === 0) {
throw new Error('Unable to parse data from text/html');
}
return result;
}
exports.parsePasteHtml = parsePasteHtml;
// Helper function to add css style properties to an html tag
function _styleAttr(style) {
return _.map(style, (value, prop) => `${prop}: ${value};`).join(' ');
}
/**
* groupBy takes in tableData and colId and returns an array of objects of unique values and counts.
*
* @param tableData
* @param colId
* @param {number} =optSort - Optional sort flag to return array sorted by count; 1 for asc, -1 for desc.
*/
function groupBy(tableData, colId, optSort) {
var groups = _.map(
_.countBy(tableData.getColValues(colId)),
function(value, key) {
return {
key: key,
count: value,
};
}
);
groups = _.sortBy(groups, 'key'); // first sort by key, then by count
return optSort ? _.sortBy(groups, function(el) { return optSort * el.count; }) : groups;
}
exports.groupBy = groupBy;
/**
* Given a selection object, creates a action to set all references in the object to the empty string.
* @param {Object} selection - an object with a list of selected row Ids, selected column Ids, a list of
* column metaRowModels and other information about the currently selected cells.
* See GridView.js getSelection and DetailView.js getSelection.
* @returns {Object} BulkUpdateRecord action
*/
function makeDeleteAction(selection) {
let blankRow = selection.rowIds.map(() => '');
let colIds = selection.fields
.filter(field => !field.column().isRealFormula() && !field.disableEditData())
.map(field => field.colId());
// Get the tableId from the first selected column.
let tableId = selection.fields[0].column().table().tableId();
return colIds.length === 0 ? null :
['BulkUpdateRecord', tableId, selection.rowIds, _.object(colIds, colIds.map(() => blankRow))];
}
exports.makeDeleteAction = makeDeleteAction;