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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package ui
import (
"github.com/lxn/walk"
"golang.zx2c4.com/wireguard/windows/service"
"math"
)
type sizeAndState struct {
size walk.Size
state service.TunnelState
}
type iconAndState struct {
icon *walk.Icon
state service.TunnelState
}
type TunnelStatusImageProvider struct {
imagesBySizeAndState map[sizeAndState]*walk.Bitmap
iconsByBaseIconAndState map[iconAndState]*walk.Icon
stoppedBrush *walk.SolidColorBrush
startingBrush *walk.SolidColorBrush
startedBrush *walk.SolidColorBrush
stoppedPen *walk.CosmeticPen
startingPen *walk.CosmeticPen
startedPen *walk.CosmeticPen
}
const (
colorStopped = 0xe1e1e1
colorStarting = 0xfec031
colorStarted = 0x36ce42
)
func hexColor(c uint32) walk.Color {
return walk.Color((((c >> 16) & 0xff) << 0) | (((c >> 8) & 0xff) << 8) | (((c >> 0) & 0xff) << 16))
}
func darkColor(c walk.Color) walk.Color {
// Convert to HSL
r, g, b := float64((uint32(c)>>16)&0xff)/255.0, float64((uint32(c)>>8)&0xff)/255.0, float64((uint32(c)>>0)&0xff)/255.0
min := math.Min(r, math.Min(g, b))
max := math.Max(r, math.Max(g, b))
deltaMinMax := max - min
l := (max + min) / 2
h, s := 0.0, 0.0
if deltaMinMax != 0 {
if l < 0.5 {
s = deltaMinMax / (max + min)
} else {
s = deltaMinMax / (2 - max - min)
}
deltaRed := (((max - r) / 6) + (deltaMinMax / 2)) / deltaMinMax
deltaGreen := (((max - g) / 6) + (deltaMinMax / 2)) / deltaMinMax
deltaBlue := (((max - b) / 6) + (deltaMinMax / 2)) / deltaMinMax
if r == max {
h = deltaBlue - deltaGreen
} else if g == max {
h = (1.0 / 3.0) + deltaRed - deltaBlue
} else if b == max {
h = (2.0 / 3.0) + deltaGreen - deltaRed
}
if h < 0 {
h += 1
} else if h > 1 {
h -= 1
}
}
// Darken by 10%
l = math.Max(0, l-0.1)
// Convert back to RGB
if s == 0 {
return walk.Color((uint32(l*255) << 16) | (uint32(l*255) << 8) | (uint32(l*255) << 0))
}
var v1, v2 float64
if l < 0.5 {
v2 = l * (1 + s)
} else {
v2 = (l + s) - (s * l)
}
v1 = 2.0*l - v2
co := func(v1, v2, vH float64) float64 {
if vH < 0 {
vH += 1
}
if vH > 1 {
vH -= 1
}
if (6.0 * vH) < 1 {
return v1 + (v2-v1)*6.0*vH
}
if (2.0 * vH) < 1 {
return v2
}
if (3.0 * vH) < 2 {
return v1 + (v2-v1)*((2.0/3.0)-vH)*6.0
}
return v1
}
r, g, b = co(v1, v2, h+(1.0/3.0)), co(v1, v2, h), co(v1, v2, h-(1.0/3.0))
return walk.Color((uint32(r*255) << 16) | (uint32(g*255) << 8) | (uint32(b*255) << 0))
}
func NewTunnelStatusImageProvider() (*TunnelStatusImageProvider, error) {
tsip := &TunnelStatusImageProvider{
imagesBySizeAndState: make(map[sizeAndState]*walk.Bitmap),
iconsByBaseIconAndState: make(map[iconAndState]*walk.Icon),
}
var err error
var disposables walk.Disposables
defer disposables.Treat()
if tsip.stoppedBrush, err = walk.NewSolidColorBrush(hexColor(colorStopped)); err != nil {
return nil, err
}
disposables.Add(tsip.stoppedBrush)
if tsip.startingBrush, err = walk.NewSolidColorBrush(hexColor(colorStarting)); err != nil {
return nil, err
}
disposables.Add(tsip.startingBrush)
if tsip.startedBrush, err = walk.NewSolidColorBrush(hexColor(colorStarted)); err != nil {
return nil, err
}
disposables.Add(tsip.startedBrush)
if tsip.stoppedPen, err = walk.NewCosmeticPen(walk.PenSolid, darkColor(hexColor(colorStopped))); err != nil {
return nil, err
}
disposables.Add(tsip.stoppedPen)
if tsip.startingPen, err = walk.NewCosmeticPen(walk.PenSolid, darkColor(hexColor(colorStarting))); err != nil {
return nil, err
}
disposables.Add(tsip.startingPen)
if tsip.startedPen, err = walk.NewCosmeticPen(walk.PenSolid, darkColor(hexColor(colorStarted))); err != nil {
return nil, err
}
disposables.Add(tsip.startedPen)
disposables.Spare()
return tsip, nil
}
func (tsip *TunnelStatusImageProvider) Dispose() {
if tsip.imagesBySizeAndState != nil {
for _, img := range tsip.imagesBySizeAndState {
img.Dispose()
}
tsip.imagesBySizeAndState = nil
}
if tsip.iconsByBaseIconAndState != nil {
for _, icon := range tsip.iconsByBaseIconAndState {
icon.Dispose()
}
tsip.iconsByBaseIconAndState = nil
}
if tsip.stoppedBrush != nil {
tsip.stoppedBrush.Dispose()
tsip.stoppedBrush = nil
}
if tsip.startingBrush != nil {
tsip.startingBrush.Dispose()
tsip.startingBrush = nil
}
if tsip.startedBrush != nil {
tsip.startedBrush.Dispose()
tsip.startedBrush = nil
}
if tsip.stoppedPen != nil {
tsip.stoppedPen.Dispose()
tsip.stoppedPen = nil
}
if tsip.startingPen != nil {
tsip.startingPen.Dispose()
tsip.startingPen = nil
}
if tsip.startedPen != nil {
tsip.startedPen.Dispose()
tsip.startedPen = nil
}
}
func (tsip *TunnelStatusImageProvider) ImageForTunnel(tunnel *service.Tunnel, size walk.Size) (*walk.Bitmap, error) {
state, err := tunnel.State()
if err != nil {
return nil, err
}
return tsip.ImageForState(state, size)
}
func (tsip *TunnelStatusImageProvider) ImageForState(state service.TunnelState, size walk.Size) (*walk.Bitmap, error) {
key := sizeAndState{size, state}
if img, ok := tsip.imagesBySizeAndState[key]; ok {
return img, nil
}
img, err := walk.NewBitmapWithTransparentPixels(size)
if err != nil {
return nil, err
}
canvas, err := walk.NewCanvasFromImage(img)
if err != nil {
return nil, err
}
defer canvas.Dispose()
if err := tsip.PaintForState(state, canvas, walk.Rectangle{0, 0, size.Width, size.Height}); err != nil {
return nil, err
}
tsip.imagesBySizeAndState[key] = img
return img, nil
}
func (tsip *TunnelStatusImageProvider) IconWithOverlayForTunnel(baseIcon *walk.Icon, tunnel *service.Tunnel) (*walk.Icon, error) {
state, err := tunnel.State()
if err != nil {
return nil, err
}
return tsip.IconWithOverlayForState(baseIcon, state)
}
func (tsip *TunnelStatusImageProvider) IconWithOverlayForState(baseIcon *walk.Icon, state service.TunnelState) (*walk.Icon, error) {
key := iconAndState{baseIcon, state}
if icon, ok := tsip.iconsByBaseIconAndState[key]; ok {
return icon, nil
}
size := baseIcon.Size()
bmp, err := walk.NewBitmapWithTransparentPixels(size)
if err != nil {
return nil, err
}
defer bmp.Dispose()
canvas, err := walk.NewCanvasFromImage(bmp)
if err != nil {
return nil, err
}
defer canvas.Dispose()
if err := canvas.DrawImage(baseIcon, walk.Point{}); err != nil {
return nil, err
}
w := int(float64(size.Width) * 0.75)
h := int(float64(size.Height) * 0.75)
bounds := walk.Rectangle{4 + size.Width - w, 4 + size.Height - h, w, h}
if err := tsip.PaintForState(state, canvas, bounds); err != nil {
return nil, err
}
canvas.Dispose()
icon, err := walk.NewIconFromBitmap(bmp)
if err != nil {
return nil, err
}
tsip.iconsByBaseIconAndState[key] = icon
return icon, nil
}
func (tsip *TunnelStatusImageProvider) PaintForTunnel(tunnel *service.Tunnel, canvas *walk.Canvas, bounds walk.Rectangle) error {
state, err := tunnel.State()
if err != nil {
return err
}
return tsip.PaintForState(state, canvas, bounds)
}
func (tsip *TunnelStatusImageProvider) PaintForState(state service.TunnelState, canvas *walk.Canvas, bounds walk.Rectangle) error {
var (
brush *walk.SolidColorBrush
pen *walk.CosmeticPen
)
switch state {
case service.TunnelStarted:
brush = tsip.startedBrush
pen = tsip.startedPen
case service.TunnelStarting:
brush = tsip.startingBrush
pen = tsip.startingPen
default:
brush = tsip.stoppedBrush
pen = tsip.stoppedPen
}
b := bounds
b.X += 4
b.Y += 4
b.Height -= 8
b.Width = b.Height
if err := canvas.FillEllipse(brush, b); err != nil {
return err
}
if err := canvas.DrawEllipse(pen, b); err != nil {
return err
}
return nil
}
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