move key processing to RecoveryUI

Move the key for handling keys from ScreenRecoveryUI to RecoveryUI, so
it can be used by devices without screens.  Remove the UIParameters
struct and replace it with some new member variables in
ScreenRecoveryUI.

Change-Id: I70094ecbc4acbf76ce44d5b5ec2036c36bdc3414

1 files changed, 26 insertions, 5 deletions

diff --git a/ui.h b/ui.h
index 3ca99a6..750b993 100644
--- a/ui.h
+++ b/ui.h
@@ -17,13 +17,18 @@
 #ifndef RECOVERY_UI_H
 #define RECOVERY_UI_H
 
+#include <linux/input.h>
+#include <pthread.h>
+
 // Abstract class for controlling the user interface during recovery.
 class RecoveryUI {
   public:
+    RecoveryUI();
+
     virtual ~RecoveryUI() { }
 
     // Initialize the object; called before anything else.
-    virtual void Init() = 0;
+    virtual void Init();
 
     // Set the overall recovery state ("background image").
     enum Icon { NONE, INSTALLING, ERROR };
@@ -57,19 +62,19 @@ class RecoveryUI {
     // --- key handling ---
 
     // Wait for keypress and return it.  May return -1 after timeout.
-    virtual int WaitKey() = 0;
+    virtual int WaitKey();
 
-    virtual bool IsKeyPressed(int key) = 0;
+    virtual bool IsKeyPressed(int key);
 
     // Erase any queued-up keys.
-    virtual void FlushKeys() = 0;
+    virtual void FlushKeys();
 
     // Called on each keypress, even while operations are in progress.
     // Return value indicates whether an immediate operation should be
     // triggered (toggling the display, rebooting the device), or if
     // the key should be enqueued for use by the main thread.
     enum KeyAction { ENQUEUE, TOGGLE, REBOOT };
-    virtual KeyAction CheckKey(int key) = 0;
+    virtual KeyAction CheckKey(int key);
 
     // --- menu display ---
 
@@ -86,6 +91,22 @@ class RecoveryUI {
     // End menu mode, resetting the text overlay so that ui_print()
     // statements will be displayed.
     virtual void EndMenu() = 0;
+
+private:
+    // Key event input queue
+    pthread_mutex_t key_queue_mutex;
+    pthread_cond_t key_queue_cond;
+    int key_queue[256], key_queue_len;
+    char key_pressed[KEY_MAX + 1];     // under key_queue_mutex
+    int key_last_down;                 // under key_queue_mutex
+    int rel_sum;
+
+    pthread_t input_t;
+
+    static void* input_thread(void* cookie);
+    static int input_callback(int fd, short revents, void* data);
+    void process_key(int key_code, int updown);
+    bool usb_connected();
 };
 
 #endif  // RECOVERY_UI_H