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b0a7c004a9
* fix(build): Restore erroneously-deleted filter function This was deleted in PR #7406 as it was mainly being used to filter core/ vs. test/mocha/ deps into separate deps files - but it turns out also to be used for filtering error messages too. Oops. * refactor(tests): Migrate advanced compilation test to ES Modules * refactor(build): Migrate main.js to TypeScript This turns out to be pretty straight forward, even if it would cause crashing if one actually tried to import this module instead of just feeding it to Closure Compiler. * chore(build): Remove goog.declareModuleId calls Replace goog.declareModuleId calls with a comment recording the former module ID for posterity (or at least until we decide how to reformat the renamings file. * chore(tests): Delete closure/goog/* For the moment we still need something to serve as base.js for the benefit of closure-make-deps, so we keep a vestigial base.js around, containing only the @provideGoog declaration. * refactor(build): Remove vestigial base.js By changing slightly the command line arguments to closure-make-deps and closure-calculate-chunks the need to have any base.js is eliminated. * chore: Typo fix for PR #7415
98 lines
2.7 KiB
TypeScript
98 lines
2.7 KiB
TypeScript
/**
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* @license
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* Copyright 2017 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* Methods for dragging a workspace visually.
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*
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* @class
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*/
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// Former goog.module ID: Blockly.WorkspaceDragger
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import * as common from './common.js';
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import {Coordinate} from './utils/coordinate.js';
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import type {WorkspaceSvg} from './workspace_svg.js';
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/**
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* Class for a workspace dragger. It moves the workspace around when it is
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* being dragged by a mouse or touch.
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*
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*/
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export class WorkspaceDragger {
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private readonly horizontalScrollEnabled_: boolean;
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private readonly verticalScrollEnabled_: boolean;
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protected startScrollXY_: Coordinate;
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/** @param workspace The workspace to drag. */
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constructor(private workspace: WorkspaceSvg) {
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/** Whether horizontal scroll is enabled. */
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this.horizontalScrollEnabled_ = this.workspace.isMovableHorizontally();
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/** Whether vertical scroll is enabled. */
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this.verticalScrollEnabled_ = this.workspace.isMovableVertically();
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/**
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* The scroll position of the workspace at the beginning of the drag.
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* Coordinate system: pixel coordinates.
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*/
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this.startScrollXY_ = new Coordinate(workspace.scrollX, workspace.scrollY);
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}
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/**
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* Sever all links from this object.
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*
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* @internal
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*/
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dispose() {
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// AnyDuringMigration because: Type 'null' is not assignable to type
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// 'WorkspaceSvg'.
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this.workspace = null as AnyDuringMigration;
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}
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/**
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* Start dragging the workspace.
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*
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* @internal
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*/
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startDrag() {
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if (common.getSelected()) {
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common.getSelected()!.unselect();
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}
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}
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/**
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* Finish dragging the workspace and put everything back where it belongs.
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*
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* @param currentDragDeltaXY How far the pointer has moved from the position
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* at the start of the drag, in pixel coordinates.
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* @internal
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*/
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endDrag(currentDragDeltaXY: Coordinate) {
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// Make sure everything is up to date.
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this.drag(currentDragDeltaXY);
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}
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/**
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* Move the workspace based on the most recent mouse movements.
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*
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* @param currentDragDeltaXY How far the pointer has moved from the position
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* at the start of the drag, in pixel coordinates.
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* @internal
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*/
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drag(currentDragDeltaXY: Coordinate) {
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const newXY = Coordinate.sum(this.startScrollXY_, currentDragDeltaXY);
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if (this.horizontalScrollEnabled_ && this.verticalScrollEnabled_) {
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this.workspace.scroll(newXY.x, newXY.y);
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} else if (this.horizontalScrollEnabled_) {
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this.workspace.scroll(newXY.x, this.workspace.scrollY);
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} else if (this.verticalScrollEnabled_) {
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this.workspace.scroll(this.workspace.scrollX, newXY.y);
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} else {
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throw new TypeError('Invalid state.');
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}
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}
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}
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