78 lines
3.1 KiB
TypeScript
78 lines
3.1 KiB
TypeScript
/**
|
|
* Copyright (c) 2017 The xterm.js authors. All rights reserved.
|
|
* @license MIT
|
|
*/
|
|
|
|
import { IMouseHelper } from './Types';
|
|
import { RenderCoordinator } from './renderer/RenderCoordinator';
|
|
import { ICharSizeService } from 'browser/services/Services';
|
|
|
|
export class MouseHelper implements IMouseHelper {
|
|
constructor(
|
|
private _renderCoordinator: RenderCoordinator,
|
|
private _charSizeService: ICharSizeService
|
|
) {
|
|
}
|
|
|
|
public static getCoordsRelativeToElement(event: {clientX: number, clientY: number}, element: HTMLElement): [number, number] {
|
|
const rect = element.getBoundingClientRect();
|
|
return [event.clientX - rect.left, event.clientY - rect.top];
|
|
}
|
|
|
|
/**
|
|
* Gets coordinates within the terminal for a particular mouse event. The result
|
|
* is returned as an array in the form [x, y] instead of an object as it's a
|
|
* little faster and this function is used in some low level code.
|
|
* @param event The mouse event.
|
|
* @param element The terminal's container element.
|
|
* @param colCount The number of columns in the terminal.
|
|
* @param rowCount The number of rows n the terminal.
|
|
* @param isSelection Whether the request is for the selection or not. This will
|
|
* apply an offset to the x value such that the left half of the cell will
|
|
* select that cell and the right half will select the next cell.
|
|
*/
|
|
public getCoords(event: {clientX: number, clientY: number}, element: HTMLElement, colCount: number, rowCount: number, isSelection?: boolean): [number, number] {
|
|
// Coordinates cannot be measured if there are no valid
|
|
if (!this._charSizeService.hasValidSize) {
|
|
return null;
|
|
}
|
|
|
|
const coords = MouseHelper.getCoordsRelativeToElement(event, element);
|
|
if (!coords) {
|
|
return null;
|
|
}
|
|
|
|
coords[0] = Math.ceil((coords[0] + (isSelection ? this._renderCoordinator.dimensions.actualCellWidth / 2 : 0)) / this._renderCoordinator.dimensions.actualCellWidth);
|
|
coords[1] = Math.ceil(coords[1] / this._renderCoordinator.dimensions.actualCellHeight);
|
|
|
|
// Ensure coordinates are within the terminal viewport. Note that selections
|
|
// need an addition point of precision to cover the end point (as characters
|
|
// cover half of one char and half of the next).
|
|
coords[0] = Math.min(Math.max(coords[0], 1), colCount + (isSelection ? 1 : 0));
|
|
coords[1] = Math.min(Math.max(coords[1], 1), rowCount);
|
|
|
|
return coords;
|
|
}
|
|
|
|
/**
|
|
* Gets coordinates within the terminal for a particular mouse event, wrapping
|
|
* them to the bounds of the terminal and adding 32 to both the x and y values
|
|
* as expected by xterm.
|
|
* @param event The mouse event.
|
|
* @param element The terminal's container element.
|
|
* @param colCount The number of columns in the terminal.
|
|
* @param rowCount The number of rows in the terminal.
|
|
*/
|
|
public getRawByteCoords(event: MouseEvent, element: HTMLElement, colCount: number, rowCount: number): { x: number, y: number } {
|
|
const coords = this.getCoords(event, element, colCount, rowCount);
|
|
let x = coords[0];
|
|
let y = coords[1];
|
|
|
|
// xterm sends raw bytes and starts at 32 (SP) for each.
|
|
x += 32;
|
|
y += 32;
|
|
|
|
return { x, y };
|
|
}
|
|
}
|