82 lines
3.0 KiB
TypeScript
82 lines
3.0 KiB
TypeScript
/**
|
|
* @license MIT
|
|
*/
|
|
|
|
import { CharMeasure } from './CharMeasure';
|
|
|
|
export function getCoordsRelativeToElement(event: MouseEvent, element: HTMLElement): [number, number] {
|
|
// Ignore browsers that don't support MouseEvent.pageX
|
|
if (event.pageX == null) {
|
|
return null;
|
|
}
|
|
|
|
let x = event.pageX;
|
|
let y = event.pageY;
|
|
|
|
// Converts the coordinates from being relative to the document to being
|
|
// relative to the terminal.
|
|
while (element && element !== self.document.documentElement) {
|
|
x -= element.offsetLeft;
|
|
y -= element.offsetTop;
|
|
element = 'offsetParent' in element ? <HTMLElement>element.offsetParent : <HTMLElement>element.parentElement;
|
|
}
|
|
return [x, y];
|
|
}
|
|
|
|
/**
|
|
* 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 rowContainer The terminal's row container.
|
|
* @param charMeasure The char measure object used to determine character sizes.
|
|
* @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.
|
|
*/
|
|
export function getCoords(event: MouseEvent, rowContainer: HTMLElement, charMeasure: CharMeasure, colCount: number, rowCount: number, isSelection?: boolean): [number, number] {
|
|
// Coordinates cannot be measured if charMeasure has not been initialized
|
|
if (!charMeasure.width || !charMeasure.height) {
|
|
return null;
|
|
}
|
|
|
|
const coords = getCoordsRelativeToElement(event, rowContainer);
|
|
if (!coords) {
|
|
return null;
|
|
}
|
|
|
|
// Convert to cols/rows.
|
|
coords[0] = Math.ceil((coords[0] + (isSelection ? charMeasure.width / 2 : 0)) / charMeasure.width);
|
|
coords[1] = Math.ceil(coords[1] / charMeasure.height);
|
|
|
|
// Ensure coordinates are within the terminal viewport.
|
|
coords[0] = Math.min(Math.max(coords[0], 1), colCount + 1);
|
|
coords[1] = Math.min(Math.max(coords[1], 1), rowCount + 1);
|
|
|
|
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 rowContainer The terminal's row container.
|
|
* @param charMeasure The char measure object used to determine character sizes.
|
|
* @param colCount The number of columns in the terminal.
|
|
* @param rowCount The number of rows in the terminal.
|
|
*/
|
|
export function getRawByteCoords(event: MouseEvent, rowContainer: HTMLElement, charMeasure: CharMeasure, colCount: number, rowCount: number): { x: number, y: number } {
|
|
const coords = getCoords(event, rowContainer, charMeasure, 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 };
|
|
}
|