discourse/app/assets/stylesheets/common/components/d-lightbox.scss
David Battersby b2ec92390a
FIX: remove background image from lightbox backdrop (#24225)
This change removes the background image (which is the small version of the uploaded image) from the lightbox backdrop.

Now a solid color (dark grey) is used for the backdrop so we can distinguish between the lightbox's head, body and footer.
2023-11-03 16:10:04 +08:00

807 lines
14 KiB
SCSS

/* Main document */
html.has-lightbox {
overflow: hidden;
&::-webkit-scrollbar {
display: none;
}
.profiler-results {
display: none;
}
#main {
padding-right: var(--document-scrollbar-width);
}
--carousel-item-size: clamp(6.5rem, 12vh, 15rem);
--d-lightbox-primary: #ffffff;
--d-lightbox-secondary: #000000;
--d-lightbox-secondary-translucent: rgba(0, 0, 0, 0.25);
--d-lightbox-tertiary: #222222;
}
/* Lightbox element*/
// Grid
.d-lightbox {
overscroll-behavior: contain;
* {
box-sizing: border-box;
}
&.is-visible {
display: grid;
place-items: stretch;
}
&__content {
display: grid;
place-items: stretch;
}
&.is-vertical &__content {
grid-template-columns: 1fr;
grid-template-rows: auto 1fr auto auto;
grid-template-areas:
"lightbox-header"
"lightbox-body"
"lightbox-carousel"
"lightbox-footer";
}
&.is-horizontal &__content {
grid-template-columns: auto 1fr;
grid-template-rows: auto 1fr auto;
grid-template-areas:
"lightbox-carousel lightbox-header"
"lightbox-carousel lightbox-body"
"lightbox-carousel lightbox-footer";
}
&__header {
grid-area: lightbox-header;
justify-self: stretch;
display: grid;
place-items: center start;
grid-template-areas: "preview-controls lightbox-header-buttons";
}
&__multi-item-controls {
grid-area: preview-controls;
place-self: center start;
display: grid;
gap: 0.5em;
place-items: center start;
grid-auto-flow: column;
grid-template-areas: "lightbox-carousel-toggle lightbox-counter";
.d-lightbox__carousel-button {
grid-area: lightbox-carousel-toggle;
}
}
&__counters {
grid-area: lightbox-counter;
}
&__header-buttons {
grid-area: lightbox-header-buttons;
place-self: center end;
display: grid;
gap: 0 0.25em;
place-items: center end;
grid-auto-flow: column;
}
&__body {
grid-area: lightbox-body;
display: grid;
place-items: center stretch;
grid-auto-flow: column;
grid-template-columns: auto 1fr auto;
grid-template-areas: "lightbox-previous-button lightbox-main-image lightbox-next-button";
}
&__main-image,
&__error-message,
&__loading-spinner {
grid-area: lightbox-main-image;
place-self: center;
display: grid;
place-items: center;
grid-auto-flow: column;
}
&__previous-button {
grid-area: lightbox-previous-button;
place-self: center start;
}
&__next-button {
grid-area: lightbox-next-button;
place-self: center end;
}
&.has-carousel &,
&.is-rotated &,
&.is-zoomed & {
&__body {
grid-auto-flow: row;
grid-template-columns: 1fr;
grid-template-areas: "lightbox-main-image";
}
}
&__footer {
grid-area: lightbox-footer;
place-self: stretch;
display: grid;
grid-auto-flow: column;
gap: 1.5em;
grid-template-columns: 1fr auto;
grid-template-areas: "lightbox-title lightbox-footer-buttons";
}
&__main-title {
grid-area: lightbox-title;
place-self: center start;
}
&__footer-buttons {
grid-area: lightbox-footer-buttons;
place-self: center end;
display: grid;
grid-auto-flow: column;
gap: 0 0.25em;
place-items: center;
}
&__carousel {
grid-area: lightbox-carousel;
display: grid;
place-items: center;
}
&__carousel-items {
grid-area: lightbox-preview-images;
display: grid;
gap: 1em;
place-items: center;
}
&__carousel-previous-button {
grid-area: lightbox-previous;
}
&__carousel-next-button {
grid-area: lightbox-next;
}
&.is-vertical &__carousel {
grid-auto-flow: column;
grid-template-columns: auto 1fr auto;
grid-template-areas: "lightbox-previous lightbox-preview-images lightbox-next";
}
&__carousel-items {
grid-auto-flow: column;
}
&__carousel-item,
&__carousel-item.is-current {
height: var(--carousel-item-size);
}
&.is-horizontal &__carousel {
max-height: 100vh;
grid-template-rows: 1fr auto 1fr;
place-items: center;
grid-template-areas:
"lightbox-previous"
"lightbox-preview-images"
"lightbox-next";
}
&.is-horizontal &__carousel-items {
grid-auto-flow: row;
}
&__carousel-item,
&__carousel-item.is-current {
width: var(--carousel-item-size);
}
&__carousel-previous-button {
place-self: self-end center;
}
&__carousel-next-button {
place-self: self-start center;
}
}
/* Base styles */
.d-lightbox {
&.is-visible {
position: fixed;
top: 0;
left: 0;
height: 100dvh;
width: 100%;
z-index: z("max");
}
&__content {
background-color: var(--d-lightbox-secondary);
&:focus-visible {
outline: none;
}
}
}
.d-lightbox {
&__header {
z-index: 1;
padding: 0.25em 1px; // 1px for button outlines
color: var(--d-lightbox-primary);
background: linear-gradient(
to right,
var(--d-lightbox-secondary),
transparent
);
position: relative;
}
}
.d-lightbox {
&__body {
@include user-select(none);
position: relative;
outline: none;
}
&__loading-spinner,
&__error-message,
&__main-image {
position: absolute;
outline: none;
}
&__backdrop {
position: fixed;
top: 0;
left: 0;
height: 100%;
width: 100%;
background-color: var(--d-lightbox-tertiary);
}
&__main-image {
aspect-ratio: var(--d-lightbox-image-aspect-ratio);
background-color: var(--d-lightbox-image-dominant-color);
box-sizing: border-box;
max-height: 100%;
max-width: 100%;
box-shadow: shadow("card");
}
&__error-message {
color: var(--d-lightbox-primary);
}
&__previous-button,
&__next-button {
z-index: 1;
position: absolute;
.d-icon {
font-size: var(--font-up-2);
}
}
}
.d-lightbox {
&__footer {
z-index: 1;
padding: 0.25em 1px;
min-width: 0;
box-sizing: border-box;
color: var(--d-lightbox-primary);
background: linear-gradient(
to left,
var(--d-lightbox-secondary),
transparent
);
position: relative;
}
&__main-title {
display: flex;
flex-wrap: wrap;
align-items: baseline;
gap: 0 0.25em;
word-break: break-word;
max-width: 100%;
// right/left padding to align with buttons
padding: 0 0.65em;
border: 1px solid transparent;
width: 100%;
min-width: 0;
overflow: hidden;
&:focus-visible {
outline: none;
border: 1px solid var(--tertiary);
border-radius: 1px;
}
}
&__item-title {
display: block;
@include ellipsis;
}
&__item-file-details {
font-size: var(--font-down-2);
color: var(--primary-600);
white-space: nowrap;
}
}
.d-lightbox {
&__carousel {
@include user-select(none);
box-sizing: border-box;
z-index: 1;
position: relative;
color: var(--d-lightbox-primary);
}
&__carousel-previous-button,
&__carousel-next-button {
z-index: 2;
.d-icon {
font-size: var(--font-up-2);
}
}
}
.d-lightbox {
&__carousel-items {
@extend %lightbox-scrollable;
max-height: 100%;
max-width: 100%;
z-index: 0;
box-sizing: border-box;
}
&__carousel-item,
&__carousel-item.is-current {
border: 1px solid transparent;
box-shadow: 0 0 2px -1px var(--d-lightbox-primary);
border-radius: 5px;
cursor: pointer;
user-select: none;
transition: all var(--d-lightbox-image-animation-duration) ease-in-out;
background-color: var(--dominant-color);
aspect-ratio: var(--aspect-ratio);
filter: saturate(0.5);
&:focus {
outline: none;
}
}
&__carousel-item.is-current {
border-color: var(--tertiary);
pointer-events: none;
filter: initial;
}
}
.d-lightbox {
&.is-vertical &__carousel {
position: relative;
background-color: var(--d-lightbox-secondary-translucent);
&:before,
&:after {
content: "";
position: absolute;
display: block;
z-index: 1;
pointer-events: none;
height: 100%;
width: 20%;
}
&:before {
left: 0;
top: 0;
background: var(--d-lightbox-secondary);
-webkit-mask-image: linear-gradient(
90deg,
var(--d-lightbox-secondary),
transparent
);
mask-image: linear-gradient(
90deg,
var(--d-lightbox-secondary),
transparent
);
}
&:after {
right: 0;
bottom: 0;
background: var(--d-lightbox-secondary);
-webkit-mask-image: linear-gradient(
-90deg,
var(--d-lightbox-secondary),
transparent
);
mask-image: linear-gradient(
-90deg,
var(--d-lightbox-secondary),
transparent
);
}
.rtl & {
&:before {
left: auto;
right: 0;
}
&:after {
left: 0;
right: auto;
}
}
}
&.is-vertical &__carousel-items {
padding: 1em 2em;
}
&__carousel-previous-button,
&__carousel-next-button {
position: absolute;
}
}
.d-lightbox {
&.is-horizontal &__carousel {
position: relative;
&:before,
&:after {
content: "";
position: absolute;
display: block;
z-index: 1;
pointer-events: none;
height: 20%;
width: 100%;
}
&:before {
left: 0;
top: 0;
background: var(--d-lightbox-secondary);
-webkit-mask-image: linear-gradient(
180deg,
var(--d-lightbox-secondary),
transparent
);
mask-image: linear-gradient(
180deg,
var(--d-lightbox-secondary) 20%,
transparent 100%
);
}
&:after {
right: 0;
bottom: 0;
background: var(--d-lightbox-secondary);
-webkit-mask-image: linear-gradient(
0,
var(--d-lightbox-secondary),
transparent
);
mask-image: linear-gradient(
0,
var(--d-lightbox-secondary) 20%,
transparent 100%
);
}
}
&.is-horizontal &__carousel-items {
padding: 50% 1em;
}
&__carousel-previous-button,
&__carousel-next-button {
transform: rotate(90deg);
.rtl & {
transform: rotate(-90deg);
}
}
}
.d-lightbox {
.btn-flat {
.d-icon {
margin: 0;
}
&:focus {
background: transparent;
outline: none;
.d-icon {
color: var(--d-lightbox-primary);
}
}
&:focus-visible {
outline: 1px solid var(--tertiary);
border-radius: 1px;
.d-icon {
color: var(--tertiary);
}
}
@include hover {
.d-icon {
color: var(--tertiary);
}
}
}
}
.d-lightbox {
&__focus-trap,
&__screen-reader-announcer {
position: absolute;
left: -100%;
top: -100%;
}
}
/* State styles */
// Carousel
.d-lightbox {
&.has-carousel {
.d-lightbox__content {
gap: 2em 0;
}
.btn-flat.d-lightbox__carousel-button .d-icon {
color: var(--tertiary);
@include hover {
color: var(--tertiary);
}
}
}
}
// expanded title
.d-lightbox {
&.has-expanded-title {
.d-lightbox__content {
gap: 2em;
}
.d-lightbox__main-title {
overflow: visible;
white-space: normal;
text-overflow: unset;
}
}
}
// Zoom
.d-lightbox {
&.can-zoom {
.d-lightbox__body {
@extend %lightbox-scrollable;
overflow: auto;
height: 100%;
width: 100%;
position: absolute;
}
.d-lightbox__main-image {
cursor: zoom-in;
}
}
&.is-zoomed {
.d-lightbox__content {
gap: 0;
}
.d-lightbox {
&__body {
@extend %lightbox-scrollable;
overflow: auto;
height: 100%;
width: 100%;
position: absolute;
}
&__zoomed-image-container {
cursor: zoom-out;
background-image: var(--d-lightbox-image-full-size-url);
background-repeat: no-repeat;
backface-visibility: hidden;
background-position: center;
.mobile-view & {
width: var(--d-lightbox-image-width);
height: var(--d-lightbox-image-height);
}
.desktop-view & {
width: 100%;
height: 100%;
}
}
}
.btn-flat.d-lightbox__zoom-button .d-icon {
color: var(--tertiary);
@include hover {
color: var(--tertiary);
}
}
}
}
// Rotate
.d-lightbox {
&.is-rotated {
.d-lightbox__body {
gap: 0;
}
.d-lightbox__main-image,
.d-lightbox__zoomed-image-container {
transform: rotate(var(--d-lightbox-image-rotation));
}
.btn-flat.d-lightbox__rotate-button .d-icon {
color: var(--tertiary);
transform: rotate(var(--d-lightbox-image-rotation));
@include hover {
color: var(--tertiary);
}
}
}
}
// Full screen
.d-lightbox {
&.is-fullscreen {
.btn-flat.d-lightbox__full-screen-button .d-icon {
color: var(--tertiary);
@include hover {
color: var(--tertiary);
}
}
}
}
/* Animations */
.d-lightbox {
&.is-visible &__content {
@extend %lightbox-animation-base;
@media (prefers-reduced-motion: no-preference) {
animation-name: lightbox-fade-in-scale;
}
}
&__backdrop,
&__main-image,
&__loading-spinner,
&__zoomed-image-container,
&__carousel,
&__main-title {
@extend %lightbox-animation-base;
animation-name: lightbox-fade-in;
@media (prefers-reduced-motion) {
animation-duration: 0s;
}
}
&__loading-spinner {
animation-delay: var(--d-lightbox-image-animation-duration);
opacity: 0;
}
&.will-close &__content {
animation-name: lightbox-fade-out;
@media (prefers-reduced-motion) {
animation-duration: 0s;
}
}
}
%lightbox-animation-base {
animation-duration: 150ms;
animation-fill-mode: forwards;
backface-visibility: hidden;
will-change: opacity;
animation-timing-function: linear;
}
%lightbox-scrollable {
backface-visibility: hidden;
// MOZ
scrollbar-width: none;
overflow: auto;
// Webkit
overflow: overlay;
&::-webkit-scrollbar {
display: none;
}
}
@keyframes lightbox-fade-out {
0% {
opacity: 1;
}
100% {
opacity: 0;
}
}
@keyframes lightbox-fade-in {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
@keyframes lightbox-fade-in-scale {
0% {
opacity: 0;
transform: scale(0.85);
}
100% {
opacity: 1;
transform: scale(1);
}
}
@keyframes lightbox-fade-out-scale {
0% {
opacity: 1;
transform: scale(1);
}
100% {
opacity: 0;
transform: scale(0.85);
}
}