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manualRowMove.js
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manualRowMove.js
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import BasePlugin from './../_base';
import Hooks from './../../pluginHooks';
import { arrayEach } from './../../helpers/array';
import { addClass, removeClass, offset } from './../../helpers/dom/element';
import { rangeEach } from './../../helpers/number';
import EventManager from './../../eventManager';
import { registerPlugin } from './../../plugins';
import RowsMapper from './rowsMapper';
import BacklightUI from './ui/backlight';
import GuidelineUI from './ui/guideline';
import './manualRowMove.css';
Hooks.getSingleton().register('beforeRowMove');
Hooks.getSingleton().register('afterRowMove');
Hooks.getSingleton().register('unmodifyRow');
const privatePool = new WeakMap();
const CSS_PLUGIN = 'ht__manualRowMove';
const CSS_SHOW_UI = 'show-ui';
const CSS_ON_MOVING = 'on-moving--rows';
const CSS_AFTER_SELECTION = 'after-selection--rows';
/**
* @plugin ManualRowMove
*
* @description
* This plugin allows to change rows order. To make rows order persistent the {@link Options#persistentState}
* plugin should be enabled.
*
* API:
* - moveRow - move single row to the new position.
* - moveRows - move many rows (as an array of indexes) to the new position.
*
* If you want apply visual changes, you have to call manually the render() method on the instance of handsontable.
*
* The plugin creates additional components to make moving possibly using user interface:
* - backlight - highlight of selected rows.
* - guideline - line which shows where rows has been moved.
*
* @class ManualRowMove
* @plugin ManualRowMove
*/
class ManualRowMove extends BasePlugin {
constructor(hotInstance) {
super(hotInstance);
/**
* Set up WeakMap of plugin to sharing private parameters;
*/
privatePool.set(this, {
rowsToMove: [],
pressed: void 0,
disallowMoving: void 0,
target: {
eventPageY: void 0,
coords: void 0,
TD: void 0,
row: void 0
}
});
/**
* List of last removed row indexes.
*
* @private
* @type {Array}
*/
this.removedRows = [];
/**
* Object containing visual row indexes mapped to data source indexes.
*
* @private
* @type {RowsMapper}
*/
this.rowsMapper = new RowsMapper(this);
/**
* Event Manager object.
*
* @private
* @type {Object}
*/
this.eventManager = new EventManager(this);
/**
* Backlight UI object.
*
* @private
* @type {Object}
*/
this.backlight = new BacklightUI(hotInstance);
/**
* Guideline UI object.
*
* @private
* @type {Object}
*/
this.guideline = new GuidelineUI(hotInstance);
}
/**
* Checks if the plugin is enabled in the handsontable settings. This method is executed in {@link Hooks#beforeInit}
* hook and if it returns `true` than the {@link ManualRowMove#enablePlugin} method is called.
*
* @returns {Boolean}
*/
isEnabled() {
return !!this.hot.getSettings().manualRowMove;
}
/**
* Enables the plugin functionality for this Handsontable instance.
*/
enablePlugin() {
if (this.enabled) {
return;
}
this.addHook('beforeOnCellMouseDown', (event, coords, TD, blockCalculations) => this.onBeforeOnCellMouseDown(event, coords, TD, blockCalculations));
this.addHook('beforeOnCellMouseOver', (event, coords, TD, blockCalculations) => this.onBeforeOnCellMouseOver(event, coords, TD, blockCalculations));
this.addHook('afterScrollHorizontally', () => this.onAfterScrollHorizontally());
this.addHook('modifyRow', (row, source) => this.onModifyRow(row, source));
this.addHook('beforeRemoveRow', (index, amount) => this.onBeforeRemoveRow(index, amount));
this.addHook('afterRemoveRow', () => this.onAfterRemoveRow());
this.addHook('afterCreateRow', (index, amount) => this.onAfterCreateRow(index, amount));
this.addHook('afterLoadData', () => this.onAfterLoadData());
this.addHook('beforeColumnSort', (column, order) => this.onBeforeColumnSort(column, order));
this.addHook('unmodifyRow', row => this.onUnmodifyRow(row));
this.registerEvents();
// TODO: move adding plugin classname to BasePlugin.
addClass(this.hot.rootElement, CSS_PLUGIN);
super.enablePlugin();
}
/**
* Updates the plugin state. This method is executed when {@link Core#updateSettings} is invoked.
*/
updatePlugin() {
this.disablePlugin();
this.enablePlugin();
this.onAfterPluginsInitialized();
super.updatePlugin();
}
/**
* Disables the plugin functionality for this Handsontable instance.
*/
disablePlugin() {
const pluginSettings = this.hot.getSettings().manualRowMove;
if (Array.isArray(pluginSettings)) {
this.rowsMapper.clearMap();
}
removeClass(this.hot.rootElement, CSS_PLUGIN);
this.unregisterEvents();
this.backlight.destroy();
this.guideline.destroy();
super.disablePlugin();
}
/**
* Moves a single row.
*
* @param {Number} row Visual row index to be moved.
* @param {Number} target Visual row index being a target for the moved row.
* @fires Hooks#beforeRowMove
* @fires Hooks#afterRowMove
*/
moveRow(row, target) {
this.moveRows([row], target);
}
/**
* Moves a multiple rows.
*
* @param {Array} rows Array of visual row indexes to be moved.
* @param {Number} target Visual row index being a target for the moved rows.
* @fires Hooks#beforeRowMove
* @fires Hooks#afterRowMove
*/
moveRows(rows, target) {
const visualRows = [...rows];
const priv = privatePool.get(this);
const beforeMoveHook = this.hot.runHooks('beforeRowMove', visualRows, target);
priv.disallowMoving = beforeMoveHook === false;
if (!priv.disallowMoving) {
// first we need to rewrite an visual indexes to physical for save reference after move
arrayEach(rows, (row, index, array) => {
array[index] = this.rowsMapper.getValueByIndex(row);
});
// next, when we have got an physical indexes, we can move rows
arrayEach(rows, (row, index) => {
const actualPosition = this.rowsMapper.getIndexByValue(row);
if (actualPosition !== target) {
this.rowsMapper.moveRow(actualPosition, target + index);
}
});
// after moving we have to clear rowsMapper from null entries
this.rowsMapper.clearNull();
}
this.hot.runHooks('afterRowMove', visualRows, target);
}
/**
* Correct the cell selection after the move action. Fired only when action was made with a mouse.
* That means that changing the row order using the API won't correct the selection.
*
* @private
* @param {Number} startRow Visual row index for the start of the selection.
* @param {Number} endRow Visual row index for the end of the selection.
*/
changeSelection(startRow, endRow) {
this.hot.selectRows(startRow, endRow);
}
/**
* Gets the sum of the heights of rows in the provided range.
*
* @private
* @param {Number} from Visual row index.
* @param {Number} to Visual row index.
* @returns {Number}
*/
getRowsHeight(from, to) {
let height = 0;
for (let i = from; i < to; i++) {
const rowHeight = this.hot.view.wt.wtTable.getRowHeight(i) || 23;
height += rowHeight;
}
return height;
}
/**
* Loads initial settings when persistent state is saved or when plugin was initialized as an array.
*
* @private
*/
initialSettings() {
const pluginSettings = this.hot.getSettings().manualRowMove;
if (Array.isArray(pluginSettings)) {
this.moveRows(pluginSettings, 0);
} else if (pluginSettings !== void 0) {
const persistentState = this.persistentStateLoad();
if (persistentState.length) {
this.moveRows(persistentState, 0);
}
}
}
/**
* Checks if the provided row is in the fixedRowsTop section.
*
* @private
* @param {Number} row Visual row index to check.
* @returns {Boolean}
*/
isFixedRowTop(row) {
return row < this.hot.getSettings().fixedRowsTop;
}
/**
* Checks if the provided row is in the fixedRowsBottom section.
*
* @private
* @param {Number} row Visual row index to check.
* @returns {Boolean}
*/
isFixedRowBottom(row) {
return row > this.hot.getSettings().fixedRowsBottom;
}
/**
* Saves the manual row positions to the persistent state (the {@link Options#persistentState} option has to be enabled).
*
* @fires Hooks#persistentStateSave
* @fires Hooks#manualRowMove
*/
persistentStateSave() {
this.hot.runHooks('persistentStateSave', 'manualRowMove', this.rowsMapper._arrayMap);
}
/**
* Loads the manual row positions from the persistent state (the {@link Options#persistentState} option has to be enabled).
*
* @returns {Array} Stored state.
*
* @fires Hooks#persistentStateLoad
* @fires Hooks#manualRowMove
*/
persistentStateLoad() {
const storedState = {};
this.hot.runHooks('persistentStateLoad', 'manualRowMove', storedState);
return storedState.value ? storedState.value : [];
}
/**
* Prepare array of indexes based on actual selection.
*
* @private
* @returns {Array}
*/
prepareRowsToMoving() {
const selection = this.hot.getSelectedRangeLast();
const selectedRows = [];
if (!selection) {
return selectedRows;
}
const { from, to } = selection;
const start = Math.min(from.row, to.row);
const end = Math.max(from.row, to.row);
rangeEach(start, end, (i) => {
selectedRows.push(i);
});
return selectedRows;
}
/**
* Update the UI visual position.
*
* @private
*/
refreshPositions() {
const priv = privatePool.get(this);
const coords = priv.target.coords;
const firstVisible = this.hot.view.wt.wtTable.getFirstVisibleRow();
const lastVisible = this.hot.view.wt.wtTable.getLastVisibleRow();
const fixedRows = this.hot.getSettings().fixedRowsTop;
const countRows = this.hot.countRows();
if (coords.row < fixedRows && firstVisible > 0) {
this.hot.scrollViewportTo(firstVisible - 1);
}
if (coords.row >= lastVisible && lastVisible < countRows) {
this.hot.scrollViewportTo(lastVisible + 1, undefined, true);
}
const wtTable = this.hot.view.wt.wtTable;
const TD = priv.target.TD;
const rootElementOffset = offset(this.hot.rootElement);
let tdOffsetTop = this.hot.view.THEAD.offsetHeight + this.getRowsHeight(0, coords.row);
const mouseOffsetTop = priv.target.eventPageY - rootElementOffset.top + wtTable.holder.scrollTop;
const hiderHeight = wtTable.hider.offsetHeight;
const tbodyOffsetTop = wtTable.TBODY.offsetTop;
const backlightElemMarginTop = this.backlight.getOffset().top;
const backlightElemHeight = this.backlight.getSize().height;
if (this.isFixedRowTop(coords.row)) {
tdOffsetTop += wtTable.holder.scrollTop;
}
// todo: fixedRowsBottom
// if (this.isFixedRowBottom(coords.row)) {
//
// }
if (coords.row < 0) {
// if hover on colHeader
priv.target.row = firstVisible > 0 ? firstVisible - 1 : firstVisible;
} else if ((TD.offsetHeight / 2) + tdOffsetTop <= mouseOffsetTop) {
// if hover on lower part of TD
priv.target.row = coords.row + 1;
// unfortunately first row is bigger than rest
tdOffsetTop += coords.row === 0 ? TD.offsetHeight - 1 : TD.offsetHeight;
} else {
// elsewhere on table
priv.target.row = coords.row;
}
let backlightTop = mouseOffsetTop;
let guidelineTop = tdOffsetTop;
if (mouseOffsetTop + backlightElemHeight + backlightElemMarginTop >= hiderHeight) {
// prevent display backlight below table
backlightTop = hiderHeight - backlightElemHeight - backlightElemMarginTop;
} else if (mouseOffsetTop + backlightElemMarginTop < tbodyOffsetTop) {
// prevent display above below table
backlightTop = tbodyOffsetTop + Math.abs(backlightElemMarginTop);
}
if (tdOffsetTop >= hiderHeight - 1) {
// prevent display guideline below table
guidelineTop = hiderHeight - 1;
}
let topOverlayHeight = 0;
if (this.hot.view.wt.wtOverlays.topOverlay) {
topOverlayHeight = this.hot.view.wt.wtOverlays.topOverlay.clone.wtTable.TABLE.offsetHeight;
}
if (coords.row >= fixedRows && (guidelineTop - wtTable.holder.scrollTop) < topOverlayHeight) {
this.hot.scrollViewportTo(coords.row);
}
this.backlight.setPosition(backlightTop);
this.guideline.setPosition(guidelineTop);
}
/**
* This method checks arrayMap from rowsMapper and updates the rowsMapper if it's necessary.
*
* @private
*/
updateRowsMapper() {
const countRows = this.hot.countSourceRows();
const rowsMapperLen = this.rowsMapper._arrayMap.length;
if (rowsMapperLen === 0) {
this.rowsMapper.createMap(countRows || this.hot.getSettings().startRows);
} else if (rowsMapperLen < countRows) {
const diff = countRows - rowsMapperLen;
this.rowsMapper.insertItems(rowsMapperLen, diff);
} else if (rowsMapperLen > countRows) {
const maxIndex = countRows - 1;
const rowsToRemove = [];
arrayEach(this.rowsMapper._arrayMap, (value, index) => {
if (value > maxIndex) {
rowsToRemove.push(index);
}
});
this.rowsMapper.removeItems(rowsToRemove);
}
}
/**
* Binds the events used by the plugin.
*
* @private
*/
registerEvents() {
const { documentElement } = this.hot.rootDocument;
this.eventManager.addEventListener(documentElement, 'mousemove', event => this.onMouseMove(event));
this.eventManager.addEventListener(documentElement, 'mouseup', () => this.onMouseUp());
}
/**
* Unbinds the events used by the plugin.
*
* @private
*/
unregisterEvents() {
this.eventManager.clear();
}
/**
* `beforeColumnSort` hook callback. If user uses the sorting, manual row moving is disabled.
*
* @private
* @param {Number} column Column index where soring is present
* @param {*} order State of sorting. ASC/DESC/None
*/
onBeforeColumnSort(column, order) {
const priv = privatePool.get(this);
priv.disallowMoving = order !== void 0;
}
/**
* Changes the behavior of selection / dragging.
*
* @private
* @param {MouseEvent} event
* @param {CellCoords} coords Visual coordinates.
* @param {HTMLElement} TD
* @param {Object} blockCalculations
*/
onBeforeOnCellMouseDown(event, coords, TD, blockCalculations) {
const { wtTable, wtViewport } = this.hot.view.wt;
const isHeaderSelection = this.hot.selection.isSelectedByRowHeader();
const selection = this.hot.getSelectedRangeLast();
const priv = privatePool.get(this);
if (!selection || !isHeaderSelection || priv.pressed || event.button !== 0) {
priv.pressed = false;
priv.rowsToMove.length = 0;
removeClass(this.hot.rootElement, [CSS_ON_MOVING, CSS_SHOW_UI]);
return;
}
const guidelineIsNotReady = this.guideline.isBuilt() && !this.guideline.isAppended();
const backlightIsNotReady = this.backlight.isBuilt() && !this.backlight.isAppended();
if (guidelineIsNotReady && backlightIsNotReady) {
this.guideline.appendTo(wtTable.hider);
this.backlight.appendTo(wtTable.hider);
}
const { from, to } = selection;
const start = Math.min(from.row, to.row);
const end = Math.max(from.row, to.row);
if (coords.col < 0 && (coords.row >= start && coords.row <= end)) {
blockCalculations.row = true;
priv.pressed = true;
priv.target.eventPageY = event.pageY;
priv.target.coords = coords;
priv.target.TD = TD;
priv.rowsToMove = this.prepareRowsToMoving();
const leftPos = wtTable.holder.scrollLeft + wtViewport.getRowHeaderWidth();
this.backlight.setPosition(null, leftPos);
this.backlight.setSize(wtTable.hider.offsetWidth - leftPos, this.getRowsHeight(start, end + 1));
this.backlight.setOffset((this.getRowsHeight(start, coords.row) + event.layerY) * -1, null);
addClass(this.hot.rootElement, CSS_ON_MOVING);
this.refreshPositions();
} else {
removeClass(this.hot.rootElement, CSS_AFTER_SELECTION);
priv.pressed = false;
priv.rowsToMove.length = 0;
}
}
/**
* 'mouseMove' event callback. Fired when pointer move on document.documentElement.
*
* @private
* @param {MouseEvent} event `mousemove` event properties.
*/
onMouseMove(event) {
const priv = privatePool.get(this);
if (!priv.pressed) {
return;
}
// callback for browser which doesn't supports CSS pointer-event: none
if (event.realTarget === this.backlight.element) {
const height = this.backlight.getSize().height;
this.backlight.setSize(null, 0);
setTimeout(function() {
this.backlight.setPosition(null, height);
});
}
priv.target.eventPageY = event.pageY;
this.refreshPositions();
}
/**
* 'beforeOnCellMouseOver' hook callback. Fired when pointer was over cell.
*
* @private
* @param {MouseEvent} event `mouseover` event properties.
* @param {CellCoords} coords Visual cell coordinates where was fired event.
* @param {HTMLElement} TD Cell represented as HTMLElement.
* @param {Object} blockCalculations Object which contains information about blockCalculation for row, column or cells.
*/
onBeforeOnCellMouseOver(event, coords, TD, blockCalculations) {
const selectedRange = this.hot.getSelectedRangeLast();
const priv = privatePool.get(this);
if (!selectedRange || !priv.pressed) {
return;
}
if (priv.rowsToMove.indexOf(coords.row) > -1) {
removeClass(this.hot.rootElement, CSS_SHOW_UI);
} else {
addClass(this.hot.rootElement, CSS_SHOW_UI);
}
blockCalculations.row = true;
blockCalculations.column = true;
blockCalculations.cell = true;
priv.target.coords = coords;
priv.target.TD = TD;
}
/**
* `onMouseUp` hook callback.
*
* @private
*/
onMouseUp() {
const priv = privatePool.get(this);
const target = priv.target.row;
const rowsLen = priv.rowsToMove.length;
priv.pressed = false;
priv.backlightHeight = 0;
removeClass(this.hot.rootElement, [CSS_ON_MOVING, CSS_SHOW_UI, CSS_AFTER_SELECTION]);
if (this.hot.selection.isSelectedByRowHeader()) {
addClass(this.hot.rootElement, CSS_AFTER_SELECTION);
}
if (rowsLen < 1 || target === void 0 || priv.rowsToMove.indexOf(target) > -1 ||
(priv.rowsToMove[rowsLen - 1] === target - 1)) {
return;
}
this.moveRows(priv.rowsToMove, target);
this.persistentStateSave();
this.hot.render();
if (!priv.disallowMoving) {
const selectionStart = this.rowsMapper.getIndexByValue(priv.rowsToMove[0]);
const selectionEnd = this.rowsMapper.getIndexByValue(priv.rowsToMove[rowsLen - 1]);
this.changeSelection(selectionStart, selectionEnd);
}
priv.rowsToMove.length = 0;
}
/**
* `afterScrollHorizontally` hook callback. Fired the table was scrolled horizontally.
*
* @private
*/
onAfterScrollHorizontally() {
const wtTable = this.hot.view.wt.wtTable;
const headerWidth = this.hot.view.wt.wtViewport.getRowHeaderWidth();
const scrollLeft = wtTable.holder.scrollLeft;
const posLeft = headerWidth + scrollLeft;
this.backlight.setPosition(null, posLeft);
this.backlight.setSize(wtTable.hider.offsetWidth - posLeft);
}
/**
* `afterCreateRow` hook callback.
*
* @private
* @param {Number} index Visual index of the created row.
* @param {Number} amount Amount of created rows.
*/
onAfterCreateRow(index, amount) {
this.rowsMapper.shiftItems(index, amount);
}
/**
* On before remove row listener.
*
* @private
* @param {Number} index Visual row index.
* @param {Number} amount Defines how many rows removed.
*/
onBeforeRemoveRow(index, amount) {
this.removedRows.length = 0;
if (index !== false) {
// Collect physical row index.
rangeEach(index, index + amount - 1, (removedIndex) => {
this.removedRows.push(this.hot.runHooks('modifyRow', removedIndex, this.pluginName));
});
}
}
/**
* `afterRemoveRow` hook callback.
*
* @private
*/
onAfterRemoveRow() {
this.rowsMapper.unshiftItems(this.removedRows);
}
/**
* `afterLoadData` hook callback.
*
* @private
*/
onAfterLoadData() {
this.updateRowsMapper();
}
/**
* 'modifyRow' hook callback.
*
* @private
* @param {Number} row Visual Row index.
* @returns {Number} Physical row index.
*/
onModifyRow(row, source) {
let physicalRow = row;
if (source !== this.pluginName) {
const rowInMapper = this.rowsMapper.getValueByIndex(physicalRow);
physicalRow = rowInMapper === null ? physicalRow : rowInMapper;
}
return physicalRow;
}
/**
* 'unmodifyRow' hook callback.
*
* @private
* @param {Number} row Physical row index.
* @returns {Number} Visual row index.
*/
onUnmodifyRow(row) {
const indexInMapper = this.rowsMapper.getIndexByValue(row);
return indexInMapper === null ? row : indexInMapper;
}
/**
* `afterPluginsInitialized` hook callback.
*
* @private
*/
onAfterPluginsInitialized() {
this.updateRowsMapper();
this.initialSettings();
this.backlight.build();
this.guideline.build();
}
/**
* Destroys the plugin instance.
*/
destroy() {
this.backlight.destroy();
this.guideline.destroy();
this.rowsMapper.destroy();
super.destroy();
}
}
registerPlugin('ManualRowMove', ManualRowMove);
export default ManualRowMove;