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import { keyName, base } from 'w3c-keyname';
import { Plugin } from 'prosemirror-state';
const mac = typeof navigator != "undefined" && /Mac|iP(hone|[oa]d)/.test(navigator.platform);
const windows = typeof navigator != "undefined" && /Win/.test(navigator.platform);
function normalizeKeyName(name) {
let parts = name.split(/-(?!$)/), result = parts[parts.length - 1];
if (result == "Space")
result = " ";
let alt, ctrl, shift, meta;
for (let i = 0; i < parts.length - 1; i++) {
let mod = parts[i];
if (/^(cmd|meta|m)$/i.test(mod))
meta = true;
else if (/^a(lt)?$/i.test(mod))
alt = true;
else if (/^(c|ctrl|control)$/i.test(mod))
ctrl = true;
else if (/^s(hift)?$/i.test(mod))
shift = true;
else if (/^mod$/i.test(mod)) {
if (mac)
meta = true;
else
ctrl = true;
}
else
throw new Error("Unrecognized modifier name: " + mod);
}
if (alt)
result = "Alt-" + result;
if (ctrl)
result = "Ctrl-" + result;
if (meta)
result = "Meta-" + result;
if (shift)
result = "Shift-" + result;
return result;
}
function normalize(map) {
let copy = Object.create(null);
for (let prop in map)
copy[normalizeKeyName(prop)] = map[prop];
return copy;
}
function modifiers(name, event, shift = true) {
if (event.altKey)
name = "Alt-" + name;
if (event.ctrlKey)
name = "Ctrl-" + name;
if (event.metaKey)
name = "Meta-" + name;
if (shift && event.shiftKey)
name = "Shift-" + name;
return name;
}
/**
Create a keymap plugin for the given set of bindings.
Bindings should map key names to [command](https://prosemirror.net/docs/ref/#commands)-style
functions, which will be called with `(EditorState, dispatch,
EditorView)` arguments, and should return true when they've handled
the key. Note that the view argument isn't part of the command
protocol, but can be used as an escape hatch if a binding needs to
directly interact with the UI.
Key names may be strings like `"Shift-Ctrl-Enter"`—a key
identifier prefixed with zero or more modifiers. Key identifiers
are based on the strings that can appear in
[`KeyEvent.key`](https:developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key).
Use lowercase letters to refer to letter keys (or uppercase letters
if you want shift to be held). You may use `"Space"` as an alias
for the `" "` name.
Modifiers can be given in any order. `Shift-` (or `s-`), `Alt-` (or
`a-`), `Ctrl-` (or `c-` or `Control-`) and `Cmd-` (or `m-` or
`Meta-`) are recognized. For characters that are created by holding
shift, the `Shift-` prefix is implied, and should not be added
explicitly.
You can use `Mod-` as a shorthand for `Cmd-` on Mac and `Ctrl-` on
other platforms.
You can add multiple keymap plugins to an editor. The order in
which they appear determines their precedence (the ones early in
the array get to dispatch first).
*/
function keymap(bindings) {
return new Plugin({ props: { handleKeyDown: keydownHandler(bindings) } });
}
/**
Given a set of bindings (using the same format as
[`keymap`](https://prosemirror.net/docs/ref/#keymap.keymap)), return a [keydown
handler](https://prosemirror.net/docs/ref/#view.EditorProps.handleKeyDown) that handles them.
*/
function keydownHandler(bindings) {
let map = normalize(bindings);
return function (view, event) {
let name = keyName(event), baseName, direct = map[modifiers(name, event)];
if (direct && direct(view.state, view.dispatch, view))
return true;
// A character key
if (name.length == 1 && name != " ") {
if (event.shiftKey) {
// In case the name was already modified by shift, try looking
// it up without its shift modifier
let noShift = map[modifiers(name, event, false)];
if (noShift && noShift(view.state, view.dispatch, view))
return true;
}
if ((event.altKey || event.metaKey || event.ctrlKey) &&
// Ctrl-Alt may be used for AltGr on Windows
!(windows && event.ctrlKey && event.altKey) &&
(baseName = base[event.keyCode]) && baseName != name) {
// Try falling back to the keyCode when there's a modifier
// active or the character produced isn't ASCII, and our table
// produces a different name from the the keyCode. See #668,
// #1060, #1529.
let fromCode = map[modifiers(baseName, event)];
if (fromCode && fromCode(view.state, view.dispatch, view))
return true;
}
}
return false;
};
}
export { keydownHandler, keymap };