import {hoverTooltip} from 'app/client/ui/tooltips'; import {isNarrowScreen, isNarrowScreenObs, theme, vars} from 'app/client/ui2018/cssVars'; import {icon} from 'app/client/ui2018/icons'; import {Disposable, dom, DomArg, DomContents, IDisposable, makeTestId, Observable, styled} from 'grainjs'; const POPUP_INITIAL_PADDING_PX = 16; const POPUP_MIN_HEIGHT = 300; const POPUP_MAX_HEIGHT = 711; const POPUP_HEADER_HEIGHT = 30; const testId = makeTestId('test-floating-popup-'); export interface PopupOptions { title?: () => DomContents; content?: () => DomContents; onClose?: () => void; closeButton?: boolean; autoHeight?: boolean; /** Defaults to false. */ stopClickPropagationOnMove?: boolean; } export class FloatingPopup extends Disposable { protected _isMinimized = Observable.create(this, false); private _isFinishingMove = false; private _popupElement: HTMLElement | null = null; private _popupMinimizeButtonElement: HTMLElement | null = null; private _startX: number; private _startY: number; private _initialTop: number; private _initialBottom: number; private _initialLeft: number; private _resize = false; private _cursorGrab: IDisposable|null = null; constructor(protected _options: PopupOptions = {}, private _args: DomArg[] = []) { super(); if (_options.stopClickPropagationOnMove){ // weasel.js registers a 'click' listener that closes any open popups that // are outside the click target. We capture the click event here, stopping // propagation in a few scenarios where closing popups is undesirable. window.addEventListener('click', (ev) => { if (this._isFinishingMove) { ev.stopPropagation(); this._isFinishingMove = false; return; } if (this._popupMinimizeButtonElement?.contains(ev.target as Node)) { ev.stopPropagation(); this._minimizeOrMaximize(); return; } }, {capture: true}); } this._handleMouseDown = this._handleMouseDown.bind(this); this._handleMouseMove = this._handleMouseMove.bind(this); this._handleMouseUp = this._handleMouseUp.bind(this); this._handleTouchStart = this._handleTouchStart.bind(this); this._handleTouchMove = this._handleTouchMove.bind(this); this._handleTouchEnd = this._handleTouchEnd.bind(this); this._handleWindowResize = this._handleWindowResize.bind(this); this.autoDispose(isNarrowScreenObs().addListener(() => this._repositionPopup())); this.onDispose(() => { this._closePopup(); this._cursorGrab?.dispose(); }); } public showPopup() { this._popupElement = this._buildPopup(); document.body.appendChild(this._popupElement); const topPaddingPx = getTopPopupPaddingPx(); const initialLeft = document.body.offsetWidth - this._popupElement.offsetWidth - POPUP_INITIAL_PADDING_PX; const initialTop = document.body.offsetHeight - this._popupElement.offsetHeight - topPaddingPx; this._popupElement.style.left = `${initialLeft}px`; this._popupElement.style.top = `${initialTop}px`; } protected _closePopup() { if (!this._popupElement) { return; } document.body.removeChild(this._popupElement); dom.domDispose(this._popupElement); this._popupElement = null; } protected _buildTitle(): DomContents { return this._options.title?.() ?? null; } protected _buildContent(): DomContents { return this._options.content?.() ?? null; } protected _buildArgs(): any { return this._args; } private _rememberPosition() { this._initialLeft = this._popupElement!.offsetLeft; this._initialTop = this._popupElement!.offsetTop; this._initialBottom = this._popupElement!.offsetTop + this._popupElement!.offsetHeight; } private _handleMouseDown(ev: MouseEvent) { if (ev.button !== 0) { return; } // Only handle left-click. this._startX = ev.clientX; this._startY = ev.clientY; this._rememberPosition(); document.addEventListener('mousemove', this._handleMouseMove); document.addEventListener('mouseup', this._handleMouseUp); this._forceCursor(); } private _handleTouchStart(ev: TouchEvent) { this._startX = ev.touches[0].clientX; this._startY = ev.touches[0].clientY; this._rememberPosition(); document.addEventListener('touchmove', this._handleTouchMove); document.addEventListener('touchend', this._handleTouchEnd); this._resize = false; this._forceCursor(); } private _handleTouchMove({touches}: TouchEvent) { this._handleMouseMove(touches[0]); } private _handleMouseMove({clientX, clientY}: MouseEvent | Touch) { if (this._resize) { this._handleResize(clientY); } else { this._handleMove(clientX, clientY); } } private _handleResize(clientY: number) { const deltaY = clientY - this._startY; if (this._resize && !isNarrowScreen()) { // First calculate the boundaries for the new top. // First just how much we can resize the popup. let minTop = this._initialBottom - POPUP_MAX_HEIGHT; let maxTop = this._initialBottom - POPUP_MIN_HEIGHT; // Now how far we can move top (leave at least some padding for mobile). minTop = Math.max(minTop, getTopPopupPaddingPx()); // And bottom (we want the header to be visible) maxTop = Math.min(document.body.offsetHeight - POPUP_HEADER_HEIGHT - 2, maxTop); // Now get new top from those boundaries. const newTop = Math.max(minTop, Math.min(maxTop, this._initialTop + deltaY)); // And calculate the new height. const newHeight = this._initialBottom - newTop; this._popupElement!.style.top = `${newTop}px`; this._popupElement!.style.setProperty('--height', `${newHeight}px`); return; } } private _handleMove(clientX: number, clientY: number) { // Last change in position (from last move). const deltaX = clientX - this._startX; const deltaY = clientY - this._startY; // Available space where we can put the popup (anchored at top left corner). const viewPort = { right: document.body.offsetWidth, bottom: document.body.offsetHeight, top: getTopPopupPaddingPx(), left: 0, }; // Allow some extra space, where we can still move the popup outside the viewport. viewPort.right += this._popupElement!.offsetWidth - (POPUP_HEADER_HEIGHT + 2) * 4; viewPort.left -= this._popupElement!.offsetWidth - (POPUP_HEADER_HEIGHT + 2) * 4; viewPort.bottom += this._popupElement!.offsetHeight - POPUP_HEADER_HEIGHT - 2; // 2px border top let newLeft = this._initialLeft + deltaX; let newTop = this._initialTop + deltaY; const newRight = (val?: number) => { if (val !== undefined) { newLeft = val - this._popupElement!.offsetWidth; } return newLeft + this._popupElement!.offsetWidth; }; const newBottom = (val?: number) => { if (val !== undefined) { newTop = val - this._popupElement!.offsetHeight; } return newTop + this._popupElement!.offsetHeight; }; // Calculate new position in the padding area. if (newLeft < viewPort.left) { newLeft = viewPort.left; } if (newRight() > viewPort.right) { newRight(viewPort.right); } if (newTop < viewPort.top) { newTop = viewPort.top; } if (newBottom() > viewPort.bottom) { newBottom(viewPort.bottom); } this._popupElement!.style.left = `${newLeft}px`; this._popupElement!.style.top = `${newTop}px`; } private _handleMouseUp() { this._isFinishingMove = true; document.removeEventListener('mousemove', this._handleMouseMove); document.removeEventListener('mouseup', this._handleMouseUp); document.body.removeEventListener('mouseleave', this._handleMouseUp); this._handleMouseEnd(); } private _handleTouchEnd() { document.removeEventListener('touchmove', this._handleTouchMove); document.removeEventListener('touchend', this._handleTouchEnd); document.body.removeEventListener('touchcancel', this._handleTouchEnd); this._handleMouseEnd(); } private _handleMouseEnd() { this._resize = false; this._cursorGrab?.dispose(); } private _handleWindowResize() { this._repositionPopup(); } private _repositionPopup() { let newLeft = this._popupElement!.offsetLeft; let newTop = this._popupElement!.offsetTop; const topPaddingPx = getTopPopupPaddingPx(); if (newLeft - POPUP_INITIAL_PADDING_PX < 0) { newLeft = POPUP_INITIAL_PADDING_PX; } if (newTop - topPaddingPx < 0) { newTop = topPaddingPx; } if (newLeft + POPUP_INITIAL_PADDING_PX > document.body.offsetWidth - this._popupElement!.offsetWidth) { newLeft = document.body.offsetWidth - this._popupElement!.offsetWidth - POPUP_INITIAL_PADDING_PX; } if (newTop + topPaddingPx > document.body.offsetHeight - this._popupElement!.offsetHeight) { newTop = document.body.offsetHeight - this._popupElement!.offsetHeight - topPaddingPx; } this._popupElement!.style.left = `${newLeft}px`; this._popupElement!.style.top = `${newTop}px`; } private _minimizeOrMaximize() { this._isMinimized.set(!this._isMinimized.get()); this._repositionPopup(); } private _buildPopup() { const body = cssPopup( {tabIndex: '-1'}, cssPopup.cls('-auto', this._options.autoHeight ?? false), cssPopupHeader( cssBottomHandle(testId('move-handle')), dom.maybe(use => !use(this._isMinimized), () => { return cssResizeTopLayer( cssTopHandle(testId('resize-handle')), dom.on('mousedown', () => this._resize = true), dom.on('dblclick', (e) => { e.stopImmediatePropagation(); this._popupElement?.style.setProperty('--height', `${POPUP_MAX_HEIGHT}px`); this._repositionPopup(); }) ); }), dom.domComputed(this._isMinimized, isMinimized => { return [ // Copy buttons on the left side of the header, to automatically // center the title. cssPopupButtons( !this._options.closeButton ? null : cssPopupHeaderButton( icon('CrossSmall'), ), cssPopupHeaderButton( icon('Maximize') ), dom.style('visibility', 'hidden'), ), cssPopupTitle( cssPopupTitleText(this._buildTitle()), testId('title'), ), cssPopupButtons( !this._options.closeButton ? null : cssPopupHeaderButton( icon('CrossSmall'), dom.on('click', () => { this._options.onClose?.() ?? this._closePopup(); }), testId('close'), ), this._popupMinimizeButtonElement = cssPopupHeaderButton( isMinimized ? icon('Maximize'): icon('Minimize'), hoverTooltip(isMinimized ? 'Maximize' : 'Minimize', {key: 'docTutorialTooltip'}), dom.on('click', () => this._minimizeOrMaximize()), testId('minimize-maximize'), ), // Disable dragging when a button in the header is clicked. dom.on('mousedown', ev => ev.stopPropagation()), dom.on('touchstart', ev => ev.stopPropagation()), ) ]; }), dom.on('mousedown', this._handleMouseDown), dom.on('touchstart', this._handleTouchStart), dom.on('dblclick', () => this._minimizeOrMaximize()), testId('header'), ), cssPopupContent( this._buildContent(), cssPopupContent.cls('-minimized', this._isMinimized), ), () => { window.addEventListener('resize', this._handleWindowResize); }, dom.onDispose(() => { document.removeEventListener('mousemove', this._handleMouseMove); document.removeEventListener('mouseup', this._handleMouseUp); document.removeEventListener('touchmove', this._handleTouchMove); document.removeEventListener('touchend', this._handleTouchEnd); window.removeEventListener('resize', this._handleWindowResize); }), cssPopup.cls('-minimized', this._isMinimized), cssPopup.cls('-mobile', isNarrowScreenObs()), testId('window'), this._buildArgs() ); // For auto-height popups, we need to reposition the popup when the content changes. // It is important for auto-grow and to prevent popup from going off-screen. if (this._options.autoHeight) { const observer = new MutationObserver(() => { this._repositionPopup(); }); observer.observe(body, {childList: true, subtree: true}); dom.update(body, dom.onDispose(() => observer.disconnect()) ); } return body; } private _forceCursor() { this._cursorGrab?.dispose(); const type = this._resize ? 'ns-resize' : 'grabbing'; const cursorStyle: HTMLStyleElement = document.createElement('style'); cursorStyle.innerHTML = `*{cursor: ${type}!important;}`; cursorStyle.id = 'cursor-style'; document.head.appendChild(cursorStyle); const cursorOwner = { dispose() { if (this.isDisposed()) { return; } document.head.removeChild(cursorStyle); }, isDisposed() { return !cursorStyle.isConnected; } }; this._cursorGrab = cursorOwner; } } function getTopPopupPaddingPx(): number { // On mobile, we need additional padding to avoid blocking the top and bottom bars. return POPUP_INITIAL_PADDING_PX + (isNarrowScreen() ? 50 : 0); } const POPUP_HEIGHT = `min(var(--height), calc(100% - (2 * ${POPUP_INITIAL_PADDING_PX}px)))`; const POPUP_HEIGHT_MOBILE = `min(var(--height), calc(100% - (2 * ${POPUP_INITIAL_PADDING_PX}px) - (2 * 50px)))`; const POPUP_WIDTH = `min(436px, calc(100% - (2 * ${POPUP_INITIAL_PADDING_PX}px)))`; const cssPopup = styled('div', ` position: fixed; display: flex; flex-direction: column; border: 2px solid ${theme.accentBorder}; border-radius: 5px; z-index: ${vars.floatingPopupZIndex}; --height: ${POPUP_MAX_HEIGHT}px; height: ${POPUP_HEIGHT}; width: ${POPUP_WIDTH}; min-height: ${POPUP_MIN_HEIGHT}px; background-color: ${theme.popupBg}; box-shadow: 0 2px 18px 0 ${theme.popupInnerShadow}, 0 0 1px 0 ${theme.popupOuterShadow}; outline: unset; &-mobile { height: ${POPUP_HEIGHT_MOBILE}; } &-minimized { max-width: 225px; height: unset; min-height: unset; } &-minimized:not(&-mobile) { max-height: ${POPUP_HEIGHT}; } &-minimized&-mobile { max-height: ${POPUP_HEIGHT_MOBILE}; } &-auto { height: auto; max-height: ${POPUP_HEIGHT}; min-height: unset; } &-auto&-mobile { max-height: ${POPUP_HEIGHT_MOBILE}; } `); const cssPopupHeader = styled('div', ` color: ${theme.tutorialsPopupHeaderFg}; --icon-color: ${theme.tutorialsPopupHeaderFg}; background-color: ${theme.accentBorder}; align-items: center; flex-shrink: 0; cursor: grab; padding-left: 4px; padding-right: 4px; height: ${POPUP_HEADER_HEIGHT}px; user-select: none; display: flex; justify-content: space-between; position: relative; isolation: isolate; &:active { cursor: grabbing; } `); const cssPopupButtons = styled('div', ` display: flex; column-gap: 8px; align-items: center; `); const cssPopupTitle = styled('div', ` display: flex; justify-content: center; align-items: center; font-weight: 600; overflow: hidden; `); const cssPopupTitleText = styled('div', ` overflow: hidden; white-space: nowrap; text-overflow: ellipsis; `); export const cssPopupBody = styled('div', ` flex-grow: 1; padding: 24px; overflow: auto; `); const cssPopupHeaderButton = styled('div', ` padding: 4px; border-radius: 4px; cursor: pointer; z-index: 1000; &:hover { background-color: ${theme.hover}; } `); const cssResizeTopLayer = styled('div', ` position: absolute; top: -6px; left: 0; right: 0; bottom: 28px; z-index: 500; cursor: ns-resize; `); const cssTopHandle = styled('div', ` position: absolute; top: 0; left: 0; width: 1px; height: 1px; pointer-events: none; user-select: none; visibility: hidden; `); const cssBottomHandle = styled(cssTopHandle, ` top: unset; bottom: 0; left: 0; `); const cssPopupContent = styled('div', ` display: flex; flex-direction: column; flex-grow: 1; overflow: hidden; &-minimized { display: none; } `);