88 lines
3.1 KiB
JavaScript
88 lines
3.1 KiB
JavaScript
// @flow
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import { LAYOUTS } from './constants';
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import { getPinnedParticipant } from '../base/participants';
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declare var interfaceConfig: Object;
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/**
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* Returns the {@code LAYOUTS} constant associated with the layout
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* the application should currently be in.
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*
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* @param {Object} state - The redux state.
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* @returns {string}
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*/
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export function getCurrentLayout(state: Object) {
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if (shouldDisplayTileView(state)) {
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return LAYOUTS.TILE_VIEW;
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} else if (interfaceConfig.VERTICAL_FILMSTRIP) {
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return LAYOUTS.VERTICAL_FILMSTRIP_VIEW;
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}
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return LAYOUTS.HORIZONTAL_FILMSTRIP_VIEW;
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}
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/**
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* Returns how many columns should be displayed in tile view. The number
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* returned will be between 1 and 5, inclusive.
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*
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* @returns {number}
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*/
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export function getMaxColumnCount() {
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const configuredMax = interfaceConfig.TILE_VIEW_MAX_COLUMNS || 5;
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return Math.max(Math.min(configuredMax, 1), 5);
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}
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/**
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* Returns the cell count dimensions for tile view. Tile view tries to uphold
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* equal count of tiles for height and width, until maxColumn is reached in
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* which rows will be added but no more columns.
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*
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* @param {Object} state - The redux store state.
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* @param {number} maxColumns - The maximum number of columns that can be
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* displayed.
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* @returns {Object} An object is return with the desired number of columns,
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* rows, and visible rows (the rest should overflow) for the tile view layout.
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*/
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export function getTileViewGridDimensions(state: Object, maxColumns: number = getMaxColumnCount()) {
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// When in tile view mode, we must discount ourselves (the local participant) because our
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// tile is not visible.
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const { iAmRecorder } = state['features/base/config'];
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const numberOfParticipants = state['features/base/participants'].length - (iAmRecorder ? 1 : 0);
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const columnsToMaintainASquare = Math.ceil(Math.sqrt(numberOfParticipants));
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const columns = Math.min(columnsToMaintainASquare, maxColumns);
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const rows = Math.ceil(numberOfParticipants / columns);
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const visibleRows = Math.min(maxColumns, rows);
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return {
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columns,
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visibleRows
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};
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}
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/**
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* Selector for determining if the UI layout should be in tile view. Tile view
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* is determined by more than just having the tile view setting enabled, as
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* one-on-one calls should not be in tile view, as well as etherpad editing.
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*
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* @param {Object} state - The redux state.
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* @returns {boolean} True if tile view should be displayed.
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*/
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export function shouldDisplayTileView(state: Object = {}) {
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return Boolean(
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state['features/video-layout']
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&& state['features/video-layout'].tileViewEnabled
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&& (!state['features/etherpad']
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|| !state['features/etherpad'].editing)
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// Truthy check is needed for interfaceConfig to prevent errors on
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// mobile which does not have interfaceConfig. On web, tile view
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// should never be enabled for filmstrip only mode.
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&& (typeof interfaceConfig === 'undefined'
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|| !interfaceConfig.filmStripOnly)
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&& !getPinnedParticipant(state)
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);
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}
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