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authorDarius Jahandarie <djahandarie@gmail.com>2023-12-06 03:53:16 +0000
committerGitHub <noreply@github.com>2023-12-06 03:53:16 +0000
commitbd5bc1a5db29903bc098995cd9262c4576bf76af (patch)
treec9214189e0214480fcf6539ad1c6327aef6cbd1c /ext/js/dom/scroll-element.js
parentfd6bba8a2a869eaf2b2c1fa49001f933fce3c618 (diff)
parent23e6fb76319c9ed7c9bcdc3efba39bc5dd38f288 (diff)
Merge pull request #339 from toasted-nutbread/type-annotations
Type annotations
Diffstat (limited to 'ext/js/dom/scroll-element.js')
-rw-r--r--ext/js/dom/scroll-element.js50
1 files changed, 50 insertions, 0 deletions
diff --git a/ext/js/dom/scroll-element.js b/ext/js/dom/scroll-element.js
index 4b2ac70d..95f5ce5b 100644
--- a/ext/js/dom/scroll-element.js
+++ b/ext/js/dom/scroll-element.js
@@ -17,39 +17,68 @@
*/
export class ScrollElement {
+ /**
+ * @param {Element} node
+ */
constructor(node) {
+ /** @type {Element} */
this._node = node;
+ /** @type {?number} */
this._animationRequestId = null;
+ /** @type {number} */
this._animationStartTime = 0;
+ /** @type {number} */
this._animationStartX = 0;
+ /** @type {number} */
this._animationStartY = 0;
+ /** @type {number} */
this._animationEndTime = 0;
+ /** @type {number} */
this._animationEndX = 0;
+ /** @type {number} */
this._animationEndY = 0;
+ /** @type {(time: number) => void} */
this._requestAnimationFrameCallback = this._onAnimationFrame.bind(this);
}
+ /** @type {number} */
get x() {
return this._node !== null ? this._node.scrollLeft : window.scrollX || window.pageXOffset;
}
+ /** @type {number} */
get y() {
return this._node !== null ? this._node.scrollTop : window.scrollY || window.pageYOffset;
}
+ /**
+ * @param {number} y
+ */
toY(y) {
this.to(this.x, y);
}
+ /**
+ * @param {number} x
+ */
toX(x) {
this.to(x, this.y);
}
+ /**
+ * @param {number} x
+ * @param {number} y
+ */
to(x, y) {
this.stop();
this._scroll(x, y);
}
+ /**
+ * @param {number} x
+ * @param {number} y
+ * @param {number} time
+ */
animate(x, y, time) {
this._animationStartX = this.x;
this._animationStartY = this.y;
@@ -60,6 +89,7 @@ export class ScrollElement {
this._animationRequestId = window.requestAnimationFrame(this._requestAnimationFrameCallback);
}
+ /** */
stop() {
if (this._animationRequestId === null) {
return;
@@ -69,12 +99,18 @@ export class ScrollElement {
this._animationRequestId = null;
}
+ /**
+ * @returns {DOMRect}
+ */
getRect() {
return this._node.getBoundingClientRect();
}
// Private
+ /**
+ * @param {number} time
+ */
_onAnimationFrame(time) {
if (time >= this._animationEndTime) {
this._scroll(this._animationEndX, this._animationEndY);
@@ -91,6 +127,10 @@ export class ScrollElement {
this._animationRequestId = window.requestAnimationFrame(this._requestAnimationFrameCallback);
}
+ /**
+ * @param {number} t
+ * @returns {number}
+ */
_easeInOutCubic(t) {
if (t < 0.5) {
return (4.0 * t * t * t);
@@ -100,10 +140,20 @@ export class ScrollElement {
}
}
+ /**
+ * @param {number} start
+ * @param {number} end
+ * @param {number} percent
+ * @returns {number}
+ */
_lerp(start, end, percent) {
return (end - start) * percent + start;
}
+ /**
+ * @param {number} x
+ * @param {number} y
+ */
_scroll(x, y) {
if (this._node !== null) {
this._node.scrollLeft = x;