diff options
Diffstat (limited to 'ext/mixed/js/scroll.js')
| -rw-r--r-- | ext/mixed/js/scroll.js | 110 | 
1 files changed, 0 insertions, 110 deletions
diff --git a/ext/mixed/js/scroll.js b/ext/mixed/js/scroll.js deleted file mode 100644 index 33577795..00000000 --- a/ext/mixed/js/scroll.js +++ /dev/null @@ -1,110 +0,0 @@ -/* - * Copyright (C) 2019-2021  Yomichan Authors - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program.  If not, see <https://www.gnu.org/licenses/>. - */ - -class WindowScroll { -    constructor(node) { -        this._node = node; -        this._animationRequestId = null; -        this._animationStartTime = 0; -        this._animationStartX = 0; -        this._animationStartY = 0; -        this._animationEndTime = 0; -        this._animationEndX = 0; -        this._animationEndY = 0; -        this._requestAnimationFrameCallback = this._onAnimationFrame.bind(this); -    } - -    get x() { -        return this._node !== null ? this._node.scrollLeft : window.scrollX || window.pageXOffset; -    } - -    get y() { -        return this._node !== null ? this._node.scrollTop : window.scrollY || window.pageYOffset; -    } - -    toY(y) { -        this.to(this.x, y); -    } - -    toX(x) { -        this.to(x, this.y); -    } - -    to(x, y) { -        this.stop(); -        this._scroll(x, y); -    } - -    animate(x, y, time) { -        this._animationStartX = this.x; -        this._animationStartY = this.y; -        this._animationStartTime = window.performance.now(); -        this._animationEndX = x; -        this._animationEndY = y; -        this._animationEndTime = this._animationStartTime + time; -        this._animationRequestId = window.requestAnimationFrame(this._requestAnimationFrameCallback); -    } - -    stop() { -        if (this._animationRequestId === null) { -            return; -        } - -        window.cancelAnimationFrame(this._animationRequestId); -        this._animationRequestId = null; -    } - -    // Private - -    _onAnimationFrame(time) { -        if (time >= this._animationEndTime) { -            this._scroll(this._animationEndX, this._animationEndY); -            this._animationRequestId = null; -            return; -        } - -        const t = this._easeInOutCubic((time - this._animationStartTime) / (this._animationEndTime - this._animationStartTime)); -        this._scroll( -            this._lerp(this._animationStartX, this._animationEndX, t), -            this._lerp(this._animationStartY, this._animationEndY, t) -        ); - -        this._animationRequestId = window.requestAnimationFrame(this._requestAnimationFrameCallback); -    } - -    _easeInOutCubic(t) { -        if (t < 0.5) { -            return (4.0 * t * t * t); -        } else { -            t = 1.0 - t; -            return 1.0 - (4.0 * t * t * t); -        } -    } - -    _lerp(start, end, percent) { -        return (end - start) * percent + start; -    } - -    _scroll(x, y) { -        if (this._node !== null) { -            this._node.scrollLeft = x; -            this._node.scrollTop = y; -        } else { -            window.scroll(x, y); -        } -    } -}  |