5 import { CharMeasure } from './CharMeasure';
7 export function getCoordsRelativeToElement(event: MouseEvent, element: HTMLElement): [number, number] {
8 // Ignore browsers that don't support MouseEvent.pageX
9 if (event.pageX == null) {
16 // Converts the coordinates from being relative to the document to being
17 // relative to the terminal.
18 while (element && element !== self.document.documentElement) {
19 x -= element.offsetLeft;
20 y -= element.offsetTop;
21 element = 'offsetParent' in element ? <HTMLElement>element.offsetParent : <HTMLElement>element.parentElement;
27 * Gets coordinates within the terminal for a particular mouse event. The result
28 * is returned as an array in the form [x, y] instead of an object as it's a
29 * little faster and this function is used in some low level code.
30 * @param event The mouse event.
31 * @param rowContainer The terminal's row container.
32 * @param charMeasure The char measure object used to determine character sizes.
33 * @param colCount The number of columns in the terminal.
34 * @param rowCount The number of rows n the terminal.
35 * @param isSelection Whether the request is for the selection or not. This will
36 * apply an offset to the x value such that the left half of the cell will
37 * select that cell and the right half will select the next cell.
39 export function getCoords(event: MouseEvent, rowContainer: HTMLElement, charMeasure: CharMeasure, colCount: number, rowCount: number, isSelection?: boolean): [number, number] {
40 const coords = getCoordsRelativeToElement(event, rowContainer);
42 // Convert to cols/rows.
43 coords[0] = Math.ceil((coords[0] + (isSelection ? charMeasure.width / 2 : 0)) / charMeasure.width);
44 coords[1] = Math.ceil(coords[1] / charMeasure.height);
46 // Ensure coordinates are within the terminal viewport.
47 coords[0] = Math.min(Math.max(coords[0], 1), colCount + 1);
48 coords[1] = Math.min(Math.max(coords[1], 1), rowCount + 1);
54 * Gets coordinates within the terminal for a particular mouse event, wrapping
55 * them to the bounds of the terminal and adding 32 to both the x and y values
56 * as expected by xterm.
57 * @param event The mouse event.
58 * @param rowContainer The terminal's row container.
59 * @param charMeasure The char measure object used to determine character sizes.
60 * @param colCount The number of columns in the terminal.
61 * @param rowCount The number of rows in the terminal.
63 export function getRawByteCoords(event: MouseEvent, rowContainer: HTMLElement, charMeasure: CharMeasure, colCount: number, rowCount: number): { x: number, y: number } {
64 const coords = getCoords(event, rowContainer, charMeasure, colCount, rowCount);
68 // xterm sends raw bytes and starts at 32 (SP) for each.