1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
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() {
let bg = 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);
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) {console.log("r")
start = timestamp;
}
let delta = (timestamp - start);
console.log("rotating by", timestamp);
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;
}
}
|
