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Make swipe gestures feel more natural.

Removes opacity transition when swiping an article read/unread.

Adds "resistance" to the swiped entry when the 75px threshold is
reached.

Fixes an issue in which a swiped article couldn't be moved <15px.
This commit is contained in:
dzaikos 2022-04-03 07:02:30 +00:00 committed by Frédéric Guillot
parent 0f2b29741e
commit ec2b911881
2 changed files with 19 additions and 8 deletions

View file

@ -756,6 +756,12 @@ template {
display: none;
}
.touch-item {
transition-property: transform;
transition-duration: 0s;
transition-timing-function: ease-out;
}
/* Feeds list */
article.feed-parsing-error {
background-color: var(--feed-parsing-error-background-color);

View file

@ -7,6 +7,7 @@ class TouchHandler {
this.touch = {
start: { x: -1, y: -1 },
move: { x: -1, y: -1 },
moved: false,
element: null
};
}
@ -16,7 +17,7 @@ class TouchHandler {
let horizontalDistance = Math.abs(this.touch.move.x - this.touch.start.x);
let verticalDistance = Math.abs(this.touch.move.y - this.touch.start.y);
if (horizontalDistance > 30 && verticalDistance < 70) {
if (horizontalDistance > 30 && verticalDistance < 70 || this.touch.moved) {
return this.touch.move.x - this.touch.start.x;
}
}
@ -41,6 +42,7 @@ class TouchHandler {
this.touch.start.x = event.touches[0].clientX;
this.touch.start.y = event.touches[0].clientY;
this.touch.element = this.findElement(event.touches[0].target);
this.touch.element.style.transitionDuration = "0s";
}
onTouchMove(event) {
@ -55,10 +57,14 @@ class TouchHandler {
let absDistance = Math.abs(distance);
if (absDistance > 0) {
let opacity = 1 - (absDistance > 75 ? 0.9 : absDistance / 75 * 0.9);
let tx = distance > 75 ? 75 : (distance < -75 ? -75 : distance);
this.touch.moved = true;
let tx = absDistance > 75 ? Math.pow(absDistance - 75, 0.5) + 75 : absDistance;
if (distance < 0) {
tx = -tx;
}
this.touch.element.style.opacity = opacity;
this.touch.element.style.transform = "translateX(" + tx + "px)";
event.preventDefault();
@ -75,11 +81,10 @@ class TouchHandler {
if (distance > 75) {
toggleEntryStatus(this.touch.element);
}
}
// If not on the unread page, undo transform of the dragged element.
if (document.URL.split("/").indexOf("unread") == -1 || distance <= 75) {
this.touch.element.style.opacity = 1;
if (this.touch.moved) {
this.touch.element.style.transitionDuration = "0.15s";
this.touch.element.style.transform = "none";
}
}