droidtui 0.3.1

A beautiful Terminal User Interface (TUI) for Android development and ADB commands
Documentation 
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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322

use crate::adb::AdbCommand;
use crate::message::{CommandResult, Message};
use crate::model::{AppState, Model};
use crate::stream::{start_stream, StreamConfig};

/// Update function - the heart of Elm architecture
/// Takes the current model and a message, returns updated model
/// This is a pure function that handles all state transitions
pub async fn update(model: &mut Model, message: Message) {
    match message {
        // Navigation messages
        Message::MenuUp => {
            model.menu.previous();
        }

        Message::MenuDown => {
            model.menu.next();
        }

        Message::EnterChild => {
            model.menu.enter_child_mode();
            model.effects.start_fade_in();
            model.effects.start_slide_in();
        }

        Message::ExitChild => {
            model.menu.exit_child_mode();
        }

        // Command execution
        Message::ExecuteCommand(command) => {
            // Check if this is a stream command (legacy support)
            if let AdbCommand::Shell { command: cmd } = &command {
                if cmd.starts_with("STREAM") {
                    // Configure based on stream type
                    let config = match cmd.as_str() {
                        "STREAM_HD" => StreamConfig {
                            width: 1080,
                            height: 1920,
                            bitrate: "12M".to_string(),
                        },
                        "STREAM_FAST" => StreamConfig {
                            width: 720,
                            height: 1280,
                            bitrate: "4M".to_string(),
                        },
                        _ => StreamConfig::default(),
                    };

                    // Launch streaming in separate window (non-blocking)
                    match start_stream(config) {
                        Ok(stream_state) => {
                            model.stream_state = Some(stream_state);
                            model.set_result("Screen streaming started in separate window.\nClose the window or press Q in it to stop.".to_string());
                            model.state = AppState::ShowResult;
                        }
                        Err(e) => {
                            model.set_error(format!("Failed to start streaming: {}\n\nMake sure:\n- ADB is installed and in PATH\n- Device is connected\n- FFmpeg is installed", e));
                            model.state = AppState::ShowResult;
                        }
                    }
                    model.effects.start_slide_in();
                    return;
                }
            }

            model.state = AppState::Loading;
            model.clear_results();
            model.loading_counter = 0;
            model.effects.reset_slide();

            let result = execute_adb_command(model, command).await;

            // Handle result directly to avoid recursion
            match result {
                CommandResult::Success(output) => {
                    model.set_result(output);
                }
                CommandResult::Error(error) => {
                    model.set_error(error);
                }
            }
            model.state = AppState::ShowResult;
            model.effects.start_slide_in();
        }

        Message::CommandStarted => {
            model.state = AppState::Loading;
            model.loading_counter = 0;
        }

        Message::CommandCompleted(result) => {
            match result {
                CommandResult::Success(output) => {
                    model.set_result(output);
                }
                CommandResult::Error(error) => {
                    model.set_error(error);
                }
            }
            model.state = AppState::ShowResult;
            model.effects.start_slide_in();
        }

        // Scroll messages
        Message::ScrollUp => {
            if model.scroll_position > 0 {
                model.scroll_position -= 1;
            }
        }

        Message::ScrollDown => {
            if model.scroll_position + 1 < model.total_result_lines() {
                model.scroll_position += 1;
            }
        }

        Message::ScrollPageUp => {
            model.scroll_position = model.scroll_position.saturating_sub(10);
        }

        Message::ScrollPageDown => {
            let max_scroll = model.total_result_lines().saturating_sub(1);
            model.scroll_position = (model.scroll_position + 10).min(max_scroll);
        }

        Message::ScrollToTop => {
            model.scroll_position = 0;
        }

        Message::ScrollToBottom => {
            model.scroll_position = model.total_result_lines().saturating_sub(1);
        }

        // Screen streaming messages
        Message::StartStream => {
            let config = StreamConfig::default();
            match start_stream(config) {
                Ok(stream_state) => {
                    model.stream_state = Some(stream_state);
                    model.set_result("Screen streaming started in separate window.".to_string());
                    model.state = AppState::ShowResult;
                }
                Err(e) => {
                    model.set_error(format!("Failed to start streaming: {}", e));
                    model.state = AppState::ShowResult;
                }
            }
            model.effects.start_slide_in();
        }

        Message::StopStream => {
            if let Some(mut stream) = model.stream_state.take() {
                stream.stop();
            }
            model.state = AppState::Menu;
        }

        Message::UpdateFrame(_frame) => {
            // No longer used with window-based streaming
        }

        Message::TogglePause => {
            // No longer used with window-based streaming
        }

        Message::IncreaseRefreshRate => {
            // No longer used with window-based streaming
        }

        Message::DecreaseRefreshRate => {
            // No longer used with window-based streaming
        }

        // Application lifecycle
        Message::Tick => {
            tick(model).await;
        }

        Message::Quit => {
            model.running = false;
        }

        Message::ReturnToMenu => {
            model.state = AppState::Menu;
            model.clear_results();
        }

        Message::SkipStartup => {
            model.state = AppState::Menu;
            model.effects.start_slide_in();
        }
    }
}

/// Handle tick updates (animations, timers, etc.)
async fn tick(model: &mut Model) {
    let now = std::time::Instant::now();
    let elapsed = now.duration_since(model.last_tick);
    model.last_tick = now;

    // Update effects
    model.effects.tick(elapsed);

    // Update menu animations
    model.menu.tick();

    // Update loading animation
    if model.state == AppState::Loading {
        model.loading_counter += 1;
    }

    // Update reveal animation for results
    if model.state == AppState::ShowResult {
        model.reveal_counter += 1;
    }

    // Check if startup is complete
    if model.state == AppState::Startup && model.effects.is_startup_complete() {
        model.state = AppState::Menu;
    }
}

/// Execute an ADB command using the ADB manager
async fn execute_adb_command(model: &mut Model, command: AdbCommand) -> CommandResult {
    // Execute the command using the ADB manager
    match model.adb_manager.execute(command) {
        Ok(output) => CommandResult::Success(output),
        Err(e) => {
            let error_msg = format!("{}", e);

            // Add helpful context for common errors
            let enhanced_error = if error_msg.contains("Connection")
                || error_msg.contains("connection")
            {
                format!(
                    "{}\n\nTroubleshooting:\n• Make sure ADB server is running (adb start-server)\n• Check that device is connected (adb devices)\n• Verify USB debugging is enabled on device",
                    error_msg
                )
            } else if error_msg.contains("No device selected") {
                format!(
                    "{}\n\nPlease:\n• Connect an Android device via USB\n• Enable USB debugging on the device\n• Run 'List Devices' to detect your device",
                    error_msg
                )
            } else {
                error_msg
            };

            CommandResult::Error(enhanced_error)
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[tokio::test]
    async fn test_menu_navigation() {
        let mut model = Model::new();
        model.state = AppState::Menu;

        update(&mut model, Message::MenuDown).await;
        assert_eq!(model.menu.selected, 1);

        update(&mut model, Message::MenuUp).await;
        assert_eq!(model.menu.selected, 0);
    }

    #[tokio::test]
    async fn test_quit() {
        let mut model = Model::new();
        assert!(model.running);

        update(&mut model, Message::Quit).await;
        assert!(!model.running);
    }

    #[tokio::test]
    async fn test_scroll_boundaries() {
        let mut model = Model::new();
        model.wrapped_lines = vec!["Line 1".to_string(), "Line 2".to_string()];
        model.scroll_position = 0;

        // Can't scroll up from position 0
        update(&mut model, Message::ScrollUp).await;
        assert_eq!(model.scroll_position, 0);

        // Can scroll down
        update(&mut model, Message::ScrollDown).await;
        assert_eq!(model.scroll_position, 1);

        // Can't scroll past end
        update(&mut model, Message::ScrollDown).await;
        assert_eq!(model.scroll_position, 1);
    }

    #[tokio::test]
    async fn test_enter_exit_child_mode() {
        let mut model = Model::new();
        model.state = AppState::Menu;

        update(&mut model, Message::EnterChild).await;
        assert!(model.menu.is_in_child_mode());

        update(&mut model, Message::ExitChild).await;
        assert!(!model.menu.is_in_child_mode());
    }

    #[tokio::test]
    async fn test_clear_results() {
        let mut model = Model::new();
        model.set_result("Test output".to_string());
        assert!(model.command_result.is_some());
        assert!(!model.result_lines.is_empty());

        update(&mut model, Message::ReturnToMenu).await;
        assert!(model.command_result.is_none());
        assert!(model.result_lines.is_empty());
        assert_eq!(model.state, AppState::Menu);
    }
}