| 1 | package main |
| 2 | |
| 3 | import "context" |
| 4 | |
| 5 | // nativeHost is the only route from business code to the shell toolkit. Each |
| 6 | // method maps 1:1 onto a host/* call in docs/DESKTOP_HOST_PROTOCOL.md, served |
| 7 | // by the Electron shell through rpcNativeHost; tests substitute fakes. |
| 8 | type nativeHost interface { |
| 9 | ShowWindow(ctx context.Context) |
| 10 | ShowApplication(ctx context.Context) |
| 11 | HideWindow(ctx context.Context) |
| 12 | HideApplication(ctx context.Context) |
| 13 | MaximiseWindow(ctx context.Context) |
| 14 | UnmaximiseWindow(ctx context.Context) |
| 15 | MinimiseWindow(ctx context.Context) |
| 16 | UnminimiseWindow(ctx context.Context) |
| 17 | ToggleMaximiseWindow(ctx context.Context) |
| 18 | CenterWindow(ctx context.Context) |
| 19 | WindowIsMaximised(ctx context.Context) bool |
| 20 | WindowIsMinimised(ctx context.Context) bool |
| 21 | SetWindowPosition(ctx context.Context, x, y int) |
| 22 | SetWindowTitle(ctx context.Context, title string) |
| 23 | Screens(ctx context.Context) ([]nativeScreen, error) |
| 24 | OpenDirectoryDialog(ctx context.Context, opts nativeDialogOptions) (string, error) |
| 25 | OpenFileDialog(ctx context.Context, opts nativeDialogOptions) (string, error) |
| 26 | SaveFileDialog(ctx context.Context, opts nativeDialogOptions) (string, error) |
| 27 | MessageDialog(ctx context.Context, opts nativeMessageOptions) (string, error) |
| 28 | OpenExternal(ctx context.Context, url string) |
| 29 | Quit(ctx context.Context) |
| 30 | OpenDevTools(ctx context.Context) |
| 31 | } |
| 32 | |
| 33 | type nativeScreen struct { |
| 34 | Width int |
| 35 | Height int |
| 36 | Primary bool |
| 37 | Scale float64 |
| 38 | } |
| 39 | |
| 40 | type nativeFileFilter struct { |
| 41 | DisplayName string |
| 42 | Pattern string // semicolon-separated globs, e.g. "*.png;*.jpg" |
| 43 | } |
| 44 | |
| 45 | type nativeDialogOptions struct { |
| 46 | Title string |
| 47 | DefaultDirectory string |
| 48 | DefaultFilename string |
| 49 | Filters []nativeFileFilter |
| 50 | CanCreateDirectories bool |
| 51 | } |
| 52 | |
| 53 | type nativeDialogType string |
| 54 | |
| 55 | const ( |
| 56 | nativeDialogInfo nativeDialogType = "info" |
| 57 | nativeDialogWarning nativeDialogType = "warning" |
| 58 | nativeDialogError nativeDialogType = "error" |
| 59 | nativeDialogQuestion nativeDialogType = "question" |
| 60 | ) |
| 61 | |
| 62 | type nativeMessageOptions struct { |
| 63 | Type nativeDialogType |
| 64 | Title string |
| 65 | Message string |
| 66 | Buttons []string |
| 67 | DefaultButton string |
| 68 | CancelButton string |
| 69 | } |
| 70 | |
| 71 | // noopNativeHost stands in when no shell is attached (test-constructed Apps, |
| 72 | // nil receivers) so App methods never reach a toolkit that is not running. |
| 73 | type noopNativeHost struct{} |
| 74 | |
| 75 | var _ nativeHost = noopNativeHost{} |
| 76 | |
| 77 | func (noopNativeHost) ShowWindow(context.Context) {} |
| 78 | func (noopNativeHost) ShowApplication(context.Context) {} |
| 79 | func (noopNativeHost) HideWindow(context.Context) {} |
| 80 | func (noopNativeHost) HideApplication(context.Context) {} |
| 81 | func (noopNativeHost) MaximiseWindow(context.Context) {} |
| 82 | func (noopNativeHost) UnmaximiseWindow(context.Context) {} |
| 83 | func (noopNativeHost) MinimiseWindow(context.Context) {} |
| 84 | func (noopNativeHost) UnminimiseWindow(context.Context) {} |
| 85 | func (noopNativeHost) ToggleMaximiseWindow(context.Context) {} |
| 86 | func (noopNativeHost) CenterWindow(context.Context) {} |
| 87 | func (noopNativeHost) WindowIsMaximised(context.Context) bool { return false } |
| 88 | func (noopNativeHost) WindowIsMinimised(context.Context) bool { return false } |
| 89 | func (noopNativeHost) SetWindowPosition(context.Context, int, int) {} |
| 90 | func (noopNativeHost) SetWindowTitle(context.Context, string) {} |
| 91 | func (noopNativeHost) OpenExternal(context.Context, string) {} |
| 92 | func (noopNativeHost) Quit(context.Context) {} |
| 93 | func (noopNativeHost) OpenDevTools(context.Context) {} |
| 94 | |
| 95 | func (noopNativeHost) Screens(context.Context) ([]nativeScreen, error) { return nil, nil } |
| 96 | |
| 97 | func (noopNativeHost) OpenDirectoryDialog(context.Context, nativeDialogOptions) (string, error) { |
| 98 | return "", nil |
| 99 | } |
| 100 | |
| 101 | func (noopNativeHost) OpenFileDialog(context.Context, nativeDialogOptions) (string, error) { |
| 102 | return "", nil |
| 103 | } |
| 104 | |
| 105 | func (noopNativeHost) SaveFileDialog(context.Context, nativeDialogOptions) (string, error) { |
| 106 | return "", nil |
| 107 | } |
| 108 | |
| 109 | func (noopNativeHost) MessageDialog(context.Context, nativeMessageOptions) (string, error) { |
| 110 | return "", nil |
| 111 | } |
| 112 | |
| 113 | func (a *App) nativeHost() nativeHost { |
| 114 | if a == nil || a.host == nil { |
| 115 | return noopNativeHost{} |
| 116 | } |
| 117 | return a.host |
| 118 | } |
| 119 | |
| 120 | func (a *App) setNativeHost(h nativeHost) { |
| 121 | a.host = h |
| 122 | } |
| 123 |