anki/ts/editor/inputHandlers.ts
2021-03-08 20:40:23 +01:00

94 lines
2.9 KiB
TypeScript

/* Copyright: Ankitects Pty Ltd and contributors
* License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
import { EditingArea } from ".";
import { caretToEnd, nodeIsElement } from "./helpers";
import { triggerChangeTimer } from "./changeTimer";
import { updateButtonState } from "./toolbar";
function inListItem(currentField: EditingArea): boolean {
const anchor = currentField.getSelection()!.anchorNode!;
let inList = false;
let n = nodeIsElement(anchor) ? anchor : anchor.parentElement;
while (n) {
inList = inList || window.getComputedStyle(n).display == "list-item";
n = n.parentElement;
}
return inList;
}
export function onInput(event: Event): void {
// make sure IME changes get saved
triggerChangeTimer(event.currentTarget as EditingArea);
updateButtonState();
}
export function onKey(evt: KeyboardEvent): void {
const currentField = evt.currentTarget as EditingArea;
// esc clears focus, allowing dialog to close
if (evt.code === "Escape") {
currentField.blurEditable();
return;
}
// prefer <br> instead of <div></div>
if (evt.code === "Enter" && !inListItem(currentField)) {
evt.preventDefault();
document.execCommand("insertLineBreak");
}
// // fix Ctrl+right/left handling in RTL fields
if (currentField.isRightToLeft()) {
const selection = currentField.getSelection();
const granularity = evt.ctrlKey ? "word" : "character";
const alter = evt.shiftKey ? "extend" : "move";
switch (evt.code) {
case "ArrowRight":
selection.modify(alter, "right", granularity);
evt.preventDefault();
return;
case "ArrowLeft":
selection.modify(alter, "left", granularity);
evt.preventDefault();
return;
}
}
triggerChangeTimer(currentField);
}
globalThis.addEventListener("keydown", (evt: KeyboardEvent) => {
if (evt.code === "Tab") {
globalThis.addEventListener("focusin", (evt: FocusEvent) => {
const newFocusTarget = evt.target;
if (newFocusTarget instanceof EditingArea) {
caretToEnd(newFocusTarget);
updateButtonState();
}
}, { once: true })
}
})
export function onKeyUp(evt: KeyboardEvent): void {
const currentField = evt.currentTarget as EditingArea;
// Avoid div element on remove
if (evt.code === "Enter" || evt.code === "Backspace") {
const anchor = currentField.getSelection().anchorNode as Node;
if (
nodeIsElement(anchor) &&
anchor.tagName === "DIV" &&
!(anchor instanceof EditingArea) &&
anchor.childElementCount === 1 &&
anchor.children[0].tagName === "BR"
) {
anchor.replaceWith(anchor.children[0]);
}
}
}