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Update the CSS transition for breadcrumbs

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The actual transition length might need adjusting, but this is fairly close to what was requested.
This commit is contained in:
Travis Ralston 2020-06-09 15:06:54 -06:00
parent b5f9c4ba8a
commit 1467191a5d
5 changed files with 89 additions and 28 deletions
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2
package.json
View file

@ -94,6 +94,7 @@
"react-dom": "^16.9.0",
"react-focus-lock": "^2.2.1",
"react-resizable": "^1.10.1",
"react-transition-group": "^4.4.1",
"resize-observer-polyfill": "^1.5.0",
"sanitize-html": "^1.18.4",
"text-encoding-utf-8": "^1.0.1",
@ -126,6 +127,7 @@
"@types/qrcode": "^1.3.4",
"@types/react": "^16.9",
"@types/react-dom": "^16.9.8",
"@types/react-transition-group": "^4.4.0",
"@types/zxcvbn": "^4.4.0",
"babel-eslint": "^10.0.3",
"babel-jest": "^24.9.0",

34
res/css/views/rooms/_RoomBreadcrumbs2.scss
View file

@ -14,34 +14,32 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
@keyframes breadcrumb-popin {
0% {
// Ideally we'd use `width` instead of `opacity`, but we only
// have 16 nanoseconds to render the frame, and width is expensive.
opacity: 0;
transform: scale(0);
}
100% {
opacity: 1;
transform: scale(1);
}
}
.mx_RoomBreadcrumbs2 {
width: 100%;
// Create a flexbox for the crumbs
display: flex;
flex-direction: row;
align-items: flex-start;
width: 100%;
.mx_RoomBreadcrumbs2_crumb {
margin-right: 8px;
width: 32px;
}
// React loves to add elements, so only target the one we want to animate
&:first-child {
animation: breadcrumb-popin 0.3s;
}
// These classes come from the CSSTransition component. There's many more classes we
// could care about, but this is all we worried about for now. The animation works by
// first triggering the enter state with the newest breadcrumb off screen (-40px) then
// sliding it into view.
&.mx_RoomBreadcrumbs2-enter {
margin-left: -40px; // 32px for the avatar, 8px for the margin
}
&.mx_RoomBreadcrumbs2-enter-active {
margin-left: 0;
// Timing function is as-requested by design.
// NOTE: The transition time MUST match the value passed to CSSTransition!
transition: margin-left 300ms cubic-bezier(0.66, 0.02, 0.36, 1);
}
.mx_RoomBreadcrumbs2_placeholder {

49
src/components/views/rooms/RoomBreadcrumbs2.tsx
View file

@ -23,6 +23,7 @@ import { Room } from "matrix-js-sdk/src/models/room";
import defaultDispatcher from "../../../dispatcher/dispatcher";
import Analytics from "../../../Analytics";
import { UPDATE_EVENT } from "../../../stores/AsyncStore";
import { CSSTransition, TransitionGroup } from "react-transition-group";
/*******************************************************************
* CAUTION *
@ -36,6 +37,14 @@ interface IProps {
}
interface IState {
// Both of these control the animation for the breadcrumbs. For details on the
// actual animation, see the CSS.
//
// doAnimation is to lie to the CSSTransition component (see onBreadcrumbsUpdate
// for info). skipFirst is used to try and reduce jerky animation - also see the
// breadcrumb update function for info on that.
doAnimation: boolean;
skipFirst: boolean;
}
export default class RoomBreadcrumbs2 extends React.PureComponent<IProps, IState> {
@ -44,6 +53,11 @@ export default class RoomBreadcrumbs2 extends React.PureComponent<IProps, IState
constructor(props: IProps) {
super(props);
this.state = {
doAnimation: true, // technically we want animation on mount, but it won't be perfect
skipFirst: false, // render the thing, as boring as it is
};
BreadcrumbsStore.instance.on(UPDATE_EVENT, this.onBreadcrumbsUpdate);
}
@ -54,7 +68,16 @@ export default class RoomBreadcrumbs2 extends React.PureComponent<IProps, IState
private onBreadcrumbsUpdate = () => {
if (!this.isMounted) return;
this.forceUpdate(); // we have no state, so this is the best we can do
// We need to trick the CSSTransition component into updating, which means we need to
// tell it to not animate, then to animate a moment later. This causes two updates
// which means two renders. The skipFirst change is so that our don't-animate state
// doesn't show the breadcrumb we're about to reveal as it causes a visual jump/jerk.
// The second update, on the next available tick, causes the "enter" animation to start
// again and this time we want to show the newest breadcrumb because it'll be hidden
// off screen for the animation.
this.setState({doAnimation: false, skipFirst: true});
setTimeout(() => this.setState({doAnimation: true, skipFirst: false}), 0);
};
private viewRoom = (room: Room, index: number) => {
@ -77,14 +100,26 @@ export default class RoomBreadcrumbs2 extends React.PureComponent<IProps, IState
)
});
if (tiles.length === 0) {
tiles.push(
<div className="mx_RoomBreadcrumbs2_placeholder">
{_t("No recently visited rooms")}
if (tiles.length > 0) {
// NOTE: The CSSTransition timeout MUST match the timeout in our CSS!
return (
<CSSTransition
appear={true} in={this.state.doAnimation} timeout={300}
classNames='mx_RoomBreadcrumbs2'
>
<div className='mx_RoomBreadcrumbs2'>
{tiles.slice(this.state.skipFirst ? 1 : 0)}
</div>
</CSSTransition>
);
} else {
return (
<div className='mx_RoomBreadcrumbs2'>
<div className="mx_RoomBreadcrumbs2_placeholder">
{_t("No recently visited rooms")}
</div>
</div>
);
}
return <div className='mx_RoomBreadcrumbs2'>{tiles}</div>;
}
}

3
tsconfig.json
View file

@ -15,7 +15,8 @@
"types": [
"node",
"react",
"flux"
"flux",
"react-transition-group"
]
},
"include": [

29
yarn.lock
View file

@ -968,7 +968,7 @@
core-js-pure "^3.0.0"
regenerator-runtime "^0.13.4"
"@babel/runtime@^7.0.0", "@babel/runtime@^7.1.2", "@babel/runtime@^7.8.3", "@babel/runtime@^7.8.4":
"@babel/runtime@^7.0.0", "@babel/runtime@^7.1.2", "@babel/runtime@^7.5.5", "@babel/runtime@^7.8.3", "@babel/runtime@^7.8.4", "@babel/runtime@^7.8.7":
version "7.10.2"
resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.10.2.tgz#d103f21f2602497d38348a32e008637d506db839"
integrity sha512-6sF3uQw2ivImfVIl62RZ7MXhO2tap69WeWK57vAaimT6AZbE4FbqjdEJIN1UqoD6wI6B+1n9UiagafH1sxjOtg==
@ -1352,6 +1352,13 @@
dependencies:
"@types/react" "*"
"@types/react-transition-group@^4.4.0":
version "4.4.0"
resolved "https://registry.yarnpkg.com/@types/react-transition-group/-/react-transition-group-4.4.0.tgz#882839db465df1320e4753e6e9f70ca7e9b4d46d"
integrity sha512-/QfLHGpu+2fQOqQaXh8MG9q03bFENooTb/it4jr5kKaZlDQfWvjqWZg48AwzPVMBHlRuTRAY7hRHCEOXz5kV6w==
dependencies:
"@types/react" "*"
"@types/react@*", "@types/react@^16.9":
version "16.9.35"
resolved "https://registry.yarnpkg.com/@types/react/-/react-16.9.35.tgz#a0830d172e8aadd9bd41709ba2281a3124bbd368"
@ -2835,7 +2842,7 @@ cssstyle@^1.0.0:
dependencies:
cssom "0.3.x"
csstype@^2.2.0:
csstype@^2.2.0, csstype@^2.6.7:
version "2.6.10"
resolved "https://registry.yarnpkg.com/csstype/-/csstype-2.6.10.tgz#e63af50e66d7c266edb6b32909cfd0aabe03928b"
integrity sha512-D34BqZU4cIlMCY93rZHbrq9pjTAQJ3U8S8rfBqjwHxkGPThWFjzZDQpgMJY0QViLxth6ZKYiwFBo14RdN44U/w==
@ -3054,6 +3061,14 @@ doctrine@^3.0.0:
dependencies:
esutils "^2.0.2"
dom-helpers@^5.0.1:
version "5.1.4"
resolved "https://registry.yarnpkg.com/dom-helpers/-/dom-helpers-5.1.4.tgz#4609680ab5c79a45f2531441f1949b79d6587f4b"
integrity sha512-TjMyeVUvNEnOnhzs6uAn9Ya47GmMo3qq7m+Lr/3ON0Rs5kHvb8I+SQYjLUSYn7qhEm0QjW0yrBkvz9yOrwwz1A==
dependencies:
"@babel/runtime" "^7.8.7"
csstype "^2.6.7"
dom-serializer@0, dom-serializer@^0.2.1:
version "0.2.2"
resolved "https://registry.yarnpkg.com/dom-serializer/-/dom-serializer-0.2.2.tgz#1afb81f533717175d478655debc5e332d9f9bb51"
@ -7136,6 +7151,16 @@ react-test-renderer@^16.0.0-0, react-test-renderer@^16.9.0:
react-is "^16.8.6"
scheduler "^0.19.1"
react-transition-group@^4.4.1:
version "4.4.1"
resolved "https://registry.yarnpkg.com/react-transition-group/-/react-transition-group-4.4.1.tgz#63868f9325a38ea5ee9535d828327f85773345c9"
integrity sha512-Djqr7OQ2aPUiYurhPalTrVy9ddmFCCzwhqQmtN+J3+3DzLO209Fdr70QrN8Z3DsglWql6iY1lDWAfpFiBtuKGw==
dependencies:
"@babel/runtime" "^7.5.5"
dom-helpers "^5.0.1"
loose-envify "^1.4.0"
prop-types "^15.6.2"
react@^16.9.0:
version "16.13.1"
resolved "https://registry.yarnpkg.com/react/-/react-16.13.1.tgz#2e818822f1a9743122c063d6410d85c1e3afe48e"