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Copy pathlog.ts
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103 lines (90 loc) · 2.66 KB
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// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import {Nullable} from './base';
import {getElement, querySelector} from './util';
type CmdHandler = (cmd: string) => void;
// TODO(tommadams): Rename to Console.
class Log {
logElem: HTMLElement;
consoleElem: Nullable<HTMLElement> = null;
private cmdHandler: Nullable<CmdHandler> = null;
private scrollPending = false;
constructor(logElemId: string, consoleElemId: Nullable<string> = null) {
this.logElem = getElement(logElemId);
if (consoleElemId) {
this.consoleElem = getElement(consoleElemId);
this.consoleElem.addEventListener('keypress', (e) => {
// The TypeScript compiler isn't smart enough to understand that
// consoleElem is never null here.
let elem = this.consoleElem as HTMLElement;
if (e.keyCode == 13) {
let cmd = elem.innerText.trim();
if (cmd != '' && this.cmdHandler) {
this.cmdHandler(cmd);
}
elem.innerHTML = '';
e.preventDefault();
return false;
}
});
}
}
log(msg: string | HTMLElement, className='') {
let child: HTMLElement;
if (typeof msg == 'string') {
if (msg == '') {
msg = ' ';
}
child = document.createElement('div');
child.innerText = msg;
if (className != '') {
child.className = className;
}
} else {
child = msg as HTMLElement;
}
this.logElem.appendChild(child);
}
clear() {
this.logElem.innerHTML = '';
}
scroll() {
if (!this.scrollPending) {
this.scrollPending = true;
window.requestAnimationFrame(() => {
this.scrollPending = false;
if (this.logElem.lastElementChild) {
this.logElem.lastElementChild.scrollIntoView();
}
});
}
}
onConsoleCmd(cmdHandler: CmdHandler) {
this.cmdHandler = cmdHandler;
}
get hasFocus() {
return this.consoleElem && document.activeElement == this.consoleElem;
}
focus() {
if (this.consoleElem) {
this.consoleElem.focus();
}
}
blur() {
if (this.consoleElem) {
this.consoleElem.blur();
}
}
}
export {Log}