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.
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0f2b29741e
commit
ec2b911881
2 changed files with 19 additions and 8 deletions
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@ -756,6 +756,12 @@ template {
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display: none;
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}
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.touch-item {
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transition-property: transform;
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transition-duration: 0s;
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transition-timing-function: ease-out;
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}
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/* Feeds list */
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article.feed-parsing-error {
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background-color: var(--feed-parsing-error-background-color);
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@ -7,6 +7,7 @@ class TouchHandler {
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this.touch = {
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start: { x: -1, y: -1 },
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move: { x: -1, y: -1 },
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moved: false,
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element: null
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};
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}
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@ -16,7 +17,7 @@ class TouchHandler {
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let horizontalDistance = Math.abs(this.touch.move.x - this.touch.start.x);
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let verticalDistance = Math.abs(this.touch.move.y - this.touch.start.y);
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if (horizontalDistance > 30 && verticalDistance < 70) {
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if (horizontalDistance > 30 && verticalDistance < 70 || this.touch.moved) {
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return this.touch.move.x - this.touch.start.x;
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}
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}
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@ -41,6 +42,7 @@ class TouchHandler {
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this.touch.start.x = event.touches[0].clientX;
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this.touch.start.y = event.touches[0].clientY;
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this.touch.element = this.findElement(event.touches[0].target);
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this.touch.element.style.transitionDuration = "0s";
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}
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onTouchMove(event) {
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@ -55,10 +57,14 @@ class TouchHandler {
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let absDistance = Math.abs(distance);
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if (absDistance > 0) {
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let opacity = 1 - (absDistance > 75 ? 0.9 : absDistance / 75 * 0.9);
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let tx = distance > 75 ? 75 : (distance < -75 ? -75 : distance);
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this.touch.moved = true;
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let tx = absDistance > 75 ? Math.pow(absDistance - 75, 0.5) + 75 : absDistance;
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if (distance < 0) {
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tx = -tx;
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}
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this.touch.element.style.opacity = opacity;
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this.touch.element.style.transform = "translateX(" + tx + "px)";
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event.preventDefault();
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@ -77,9 +83,8 @@ class TouchHandler {
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toggleEntryStatus(this.touch.element);
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}
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// If not on the unread page, undo transform of the dragged element.
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if (document.URL.split("/").indexOf("unread") == -1 || distance <= 75) {
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this.touch.element.style.opacity = 1;
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if (this.touch.moved) {
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this.touch.element.style.transitionDuration = "0.15s";
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this.touch.element.style.transform = "none";
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}
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}
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