gristlabs_grist-core/app/client/ui/FloatingPopup.ts

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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;
}
`);