140 lines
4.0 KiB
TypeScript
140 lines
4.0 KiB
TypeScript
/*
|
|
This file is part of TALER
|
|
(C) 2016 INRIA
|
|
|
|
TALER is free software; you can redistribute it and/or modify it under the
|
|
terms of the GNU General Public License as published by the Free Software
|
|
Foundation; either version 3, or (at your option) any later version.
|
|
|
|
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
|
|
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
|
|
*/
|
|
|
|
import {
|
|
Badge
|
|
} from "./wallet";
|
|
|
|
|
|
/**
|
|
* Polyfill for requestAnimationFrame, which
|
|
* doesn't work from a background page.
|
|
*/
|
|
function rAF(cb: (ts: number) => void) {
|
|
window.setTimeout(() => {
|
|
cb(performance.now());
|
|
}, 100);
|
|
}
|
|
|
|
|
|
export class ChromeBadge implements Badge {
|
|
canvas: HTMLCanvasElement;
|
|
ctx: CanvasRenderingContext2D;
|
|
talerLogo: HTMLImageElement;
|
|
/**
|
|
* True if animation running. The animation
|
|
* might still be running even if we're not busy anymore,
|
|
* just to transition to the "normal" state in a animated way.
|
|
*/
|
|
animationRunning: boolean = false;
|
|
isBusy: boolean = false;
|
|
rotationAngle: number = 0;
|
|
static rotationAngleMax = 1000;
|
|
|
|
constructor(window?: Window) {
|
|
// Allow injecting another window for testing
|
|
let bg = window || chrome.extension.getBackgroundPage();
|
|
this.canvas = bg.document.createElement("canvas");
|
|
this.canvas.width = 32;
|
|
this.canvas.height = 32;
|
|
this.ctx = this.canvas.getContext("2d")!;
|
|
|
|
this.talerLogo = bg.document.getElementById("taler-logo") as HTMLImageElement;
|
|
if (!(this.talerLogo instanceof HTMLImageElement)) {
|
|
throw Error();
|
|
}
|
|
|
|
this.draw();
|
|
}
|
|
|
|
/**
|
|
* Draw the badge based on the current state.
|
|
*/
|
|
private draw() {
|
|
// Reset to identity
|
|
this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
|
|
this.ctx.setTransform(1, 0, 0, 1, 0, 0);
|
|
this.ctx.translate(this.canvas.width / 2, this.canvas.height / 2);
|
|
this.ctx.rotate(this.rotationAngle / ChromeBadge.rotationAngleMax * Math.PI * 2);
|
|
this.ctx.translate(-this.canvas.width / 2, -this.canvas.height / 2);
|
|
this.ctx.drawImage(this.talerLogo,
|
|
0,
|
|
0,
|
|
this.talerLogo.width,
|
|
this.talerLogo.height,
|
|
0, 0, this.canvas.width, this.canvas.height);
|
|
|
|
// Allow running outside the extension for testing
|
|
if (chrome && chrome.browserAction) {
|
|
let imageData = this.ctx.getImageData(0,
|
|
0,
|
|
this.canvas.width,
|
|
this.canvas.height);
|
|
chrome.browserAction.setIcon({imageData});
|
|
}
|
|
}
|
|
|
|
private animate() {
|
|
if (this.animationRunning) {
|
|
return;
|
|
}
|
|
this.animationRunning = true;
|
|
let start: number|undefined = undefined;
|
|
let step = (timestamp: number) => {
|
|
if (!this.animationRunning) {
|
|
return;
|
|
}
|
|
if (!start) {
|
|
start = timestamp;
|
|
}
|
|
let delta = (timestamp - start);
|
|
if (!this.isBusy && this.rotationAngle + delta >= ChromeBadge.rotationAngleMax) {
|
|
// stop if we're close enough to origin
|
|
this.rotationAngle = 0;
|
|
} else {
|
|
this.rotationAngle = (this.rotationAngle + timestamp - start) % ChromeBadge.rotationAngleMax;
|
|
}
|
|
if (this.isBusy || this.rotationAngle != 0) {
|
|
start = timestamp;
|
|
rAF(step);
|
|
} else {
|
|
this.animationRunning = false;
|
|
}
|
|
this.draw();
|
|
};
|
|
rAF(step);
|
|
}
|
|
|
|
setText(s: string) {
|
|
chrome.browserAction.setBadgeText({text: s});
|
|
}
|
|
|
|
setColor(c: string) {
|
|
chrome.browserAction.setBadgeBackgroundColor({color: c});
|
|
}
|
|
|
|
startBusy() {
|
|
if (this.isBusy) {
|
|
return;
|
|
}
|
|
this.isBusy = true;
|
|
this.animate();
|
|
}
|
|
|
|
stopBusy() {
|
|
this.isBusy = false;
|
|
}
|
|
} |