PawletOS/android_bootable_recovery
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add NextCheckKeyIsLong() and EnqueueKey() methods

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NextCheckKeyIsLong() is called right before each call to CheckKey() to
tell the implementation if the key is a long-press or not.  (To be
used on devices with few buttons.)  It's done as a separate method
(rather than a parameter to CheckKey) to not break existing recovery
UI implementations.

EnqueueKey() can be called from CheckKey() to put arbitrary code codes
in the synchronous queue (to be processed by HandleMenuKey).

Change-Id: If8a83d66efe0bbc9e2dc178e5ebe12acd216324b
This commit is contained in:
Doug Zongker
2012-12-17 10:52:58 -08:00
parent aa0dbb25a0
commit bb01d0c12b
2 changed files with 35 additions and 9 deletions
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37
ui.cpp
View File

@@ -45,7 +45,8 @@ static RecoveryUI* self = NULL;
RecoveryUI::RecoveryUI() :
key_queue_len(0),
key_last_down(-1) {
key_last_down(-1),
key_down_time(0) {
pthread_mutex_init(&key_queue_mutex, NULL);
pthread_cond_init(&key_queue_cond, NULL);
self = this;
@@ -109,19 +110,29 @@ int RecoveryUI::input_callback(int fd, short revents, void* data)
// updown == 1 for key down events; 0 for key up events
void RecoveryUI::process_key(int key_code, int updown) {
bool register_key = false;
bool long_press = false;
const long long_threshold = CLOCKS_PER_SEC * 750 / 1000;
pthread_mutex_lock(&key_queue_mutex);
key_pressed[key_code] = updown;
if (updown) {
key_last_down = key_code;
key_down_time = clock();
} else {
if (key_last_down == key_code)
if (key_last_down == key_code) {
long duration = clock() - key_down_time;
if (duration > long_threshold) {
long_press = true;
}
register_key = true;
}
key_last_down = -1;
}
pthread_mutex_unlock(&key_queue_mutex);
if (register_key) {
NextCheckKeyIsLong(long_press);
switch (CheckKey(key_code)) {
case RecoveryUI::IGNORE:
break;
@@ -135,18 +146,23 @@ void RecoveryUI::process_key(int key_code, int updown) {
break;
case RecoveryUI::ENQUEUE:
pthread_mutex_lock(&key_queue_mutex);
const int queue_max = sizeof(key_queue) / sizeof(key_queue[0]);
if (key_queue_len < queue_max) {
key_queue[key_queue_len++] = key_code;
pthread_cond_signal(&key_queue_cond);
}
pthread_mutex_unlock(&key_queue_mutex);
EnqueueKey(key_code);
break;
}
}
}
void RecoveryUI::EnqueueKey(int key_code) {
pthread_mutex_lock(&key_queue_mutex);
const int queue_max = sizeof(key_queue) / sizeof(key_queue[0]);
if (key_queue_len < queue_max) {
key_queue[key_queue_len++] = key_code;
pthread_cond_signal(&key_queue_cond);
}
pthread_mutex_unlock(&key_queue_mutex);
}
// Reads input events, handles special hot keys, and adds to the key queue.
void* RecoveryUI::input_thread(void *cookie)
{
@@ -223,3 +239,6 @@ void RecoveryUI::FlushKeys() {
RecoveryUI::KeyAction RecoveryUI::CheckKey(int key) {
return RecoveryUI::ENQUEUE;
}
void RecoveryUI::NextCheckKeyIsLong(bool is_long_press) {
}

7
ui.h
View File

@@ -19,6 +19,7 @@
#include <linux/input.h>
#include <pthread.h>
#include <time.h>
// Abstract class for controlling the user interface during recovery.
class RecoveryUI {
@@ -79,6 +80,8 @@ class RecoveryUI {
enum KeyAction { ENQUEUE, TOGGLE, REBOOT, IGNORE };
virtual KeyAction CheckKey(int key);
virtual void NextCheckKeyIsLong(bool is_long_press);
// --- menu display ---
// Display some header text followed by a menu of items, which appears
@@ -95,6 +98,9 @@ class RecoveryUI {
// statements will be displayed.
virtual void EndMenu() = 0;
protected:
void EnqueueKey(int key_code);
private:
// Key event input queue
pthread_mutex_t key_queue_mutex;
@@ -102,6 +108,7 @@ private:
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
clock_t key_down_time; // under key_queue_mutex
int rel_sum;
pthread_t input_t;