87 lines
3.3 KiB
TypeScript
87 lines
3.3 KiB
TypeScript
/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import { AbstractScrollbar, ISimplifiedPointerEvent, IScrollbarHost } from './abstractScrollbar';
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import { IScrollableElementResolvedOptions } from './scrollableElementOptions';
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import { ScrollbarState } from './scrollbarState';
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import { INewScrollPosition, Scrollable, ScrollbarVisibility, IScrollEvent } from './scrollable';
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export class VerticalScrollbar extends AbstractScrollbar {
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constructor(scrollable: Scrollable, options: IScrollableElementResolvedOptions, host: IScrollbarHost) {
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const scrollDimensions = scrollable.getScrollDimensions();
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const scrollPosition = scrollable.getCurrentScrollPosition();
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super({
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lazyRender: options.lazyRender,
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host: host,
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scrollbarState: new ScrollbarState(
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(options.verticalHasArrows ? options.arrowSize : 0),
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(options.vertical === ScrollbarVisibility.HIDDEN ? 0 : options.verticalScrollbarSize),
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0,
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scrollDimensions.height,
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scrollDimensions.scrollHeight,
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scrollPosition.scrollTop
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),
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visibility: options.vertical,
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extraScrollbarClassName: 'vertical',
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scrollable: scrollable,
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scrollByPage: options.scrollByPage
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});
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if (options.verticalHasArrows) {
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throw new Error('horizontalHasArrows is not supported in xterm.js');
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}
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this._createSlider(0, Math.floor((options.verticalScrollbarSize - options.verticalSliderSize) / 2), options.verticalSliderSize, undefined);
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}
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protected _updateSlider(sliderSize: number, sliderPosition: number): void {
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this.slider.setHeight(sliderSize);
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this.slider.setTop(sliderPosition);
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}
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protected _renderDomNode(largeSize: number, smallSize: number): void {
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this.domNode.setWidth(smallSize);
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this.domNode.setHeight(largeSize);
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this.domNode.setRight(0);
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this.domNode.setTop(0);
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}
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public handleScroll(e: IScrollEvent): boolean {
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this._shouldRender = this._handleElementScrollSize(e.scrollHeight) || this._shouldRender;
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this._shouldRender = this._handleElementScrollPosition(e.scrollTop) || this._shouldRender;
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this._shouldRender = this._handleElementSize(e.height) || this._shouldRender;
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return this._shouldRender;
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}
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protected _pointerDownRelativePosition(offsetX: number, offsetY: number): number {
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return offsetY;
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}
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protected _sliderPointerPosition(e: ISimplifiedPointerEvent): number {
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return e.pageY;
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}
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protected _sliderOrthogonalPointerPosition(e: ISimplifiedPointerEvent): number {
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return e.pageX;
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}
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protected _updateScrollbarSize(size: number): void {
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this.slider.setWidth(size);
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}
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public writeScrollPosition(target: INewScrollPosition, scrollPosition: number): void {
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target.scrollTop = scrollPosition;
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}
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public updateOptions(options: IScrollableElementResolvedOptions): void {
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this.updateScrollbarSize(options.vertical === ScrollbarVisibility.HIDDEN ? 0 : options.verticalScrollbarSize);
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this._scrollbarState.setOppositeScrollbarSize(0);
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this._visibilityController.setVisibility(options.vertical);
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this._scrollByPage = options.scrollByPage;
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}
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}
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