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android_bootable_recovery/ui.c
Koushik Dutta 1c50ff29e6 Fix ui menu bug for long menus. 
Change-Id: If009dee6b7597daeec62dd65baa7ad35e1adec5d

Conflicts:

	ui.c
2012-01-31 20:28:36 -08:00

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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <fcntl.h>
#include <linux/input.h>
#include <pthread.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "common.h"
#include <cutils/android_reboot.h>
#include "minui/minui.h"
#include "recovery_ui.h"
extern int __system(const char *command);
#ifdef BOARD_HAS_NO_SELECT_BUTTON
static int gShowBackButton = 1;
#else
static int gShowBackButton = 0;
#endif
#define MAX_COLS 96
#define MAX_ROWS 32
#define MENU_MAX_COLS 64
#define MENU_MAX_ROWS 250
#define MIN_LOG_ROWS 3
#define CHAR_WIDTH BOARD_RECOVERY_CHAR_WIDTH
#define CHAR_HEIGHT BOARD_RECOVERY_CHAR_HEIGHT
#define UI_WAIT_KEY_TIMEOUT_SEC 3600
UIParameters ui_parameters = {
6, // indeterminate progress bar frames
20, // fps
7, // installation icon frames (0 == static image)
13, 190, // installation icon overlay offset
};
static pthread_mutex_t gUpdateMutex = PTHREAD_MUTEX_INITIALIZER;
static gr_surface gBackgroundIcon[NUM_BACKGROUND_ICONS];
static gr_surface *gInstallationOverlay;
static gr_surface *gProgressBarIndeterminate;
static gr_surface gProgressBarEmpty;
static gr_surface gProgressBarFill;
static int ui_has_initialized = 0;
static int ui_log_stdout = 1;
static const struct { gr_surface* surface; const char *name; } BITMAPS[] = {
{ &gBackgroundIcon[BACKGROUND_ICON_INSTALLING], "icon_installing" },
{ &gBackgroundIcon[BACKGROUND_ICON_ERROR], "icon_error" },
{ &gBackgroundIcon[BACKGROUND_ICON_CLOCKWORK], "icon_clockwork" },
{ &gBackgroundIcon[BACKGROUND_ICON_FIRMWARE_INSTALLING], "icon_firmware_install" },
{ &gBackgroundIcon[BACKGROUND_ICON_FIRMWARE_ERROR], "icon_firmware_error" },
{ &gProgressBarEmpty, "progress_empty" },
{ &gProgressBarFill, "progress_fill" },
{ NULL, NULL },
};
static int gCurrentIcon = 0;
static int gInstallingFrame = 0;
static enum ProgressBarType {
PROGRESSBAR_TYPE_NONE,
PROGRESSBAR_TYPE_INDETERMINATE,
PROGRESSBAR_TYPE_NORMAL,
} gProgressBarType = PROGRESSBAR_TYPE_NONE;
// Progress bar scope of current operation
static float gProgressScopeStart = 0, gProgressScopeSize = 0, gProgress = 0;
static double gProgressScopeTime, gProgressScopeDuration;
// Set to 1 when both graphics pages are the same (except for the progress bar)
static int gPagesIdentical = 0;
// Log text overlay, displayed when a magic key is pressed
static char text[MAX_ROWS][MAX_COLS];
static int text_cols = 0, text_rows = 0;
static int text_col = 0, text_row = 0, text_top = 0;
static int show_text = 0;
static int show_text_ever = 0; // has show_text ever been 1?
static char menu[MENU_MAX_ROWS][MENU_MAX_COLS];
static int show_menu = 0;
static int menu_top = 0, menu_items = 0, menu_sel = 0;
static int menu_show_start = 0; // this is line which menu display is starting at
static int max_menu_rows;
// Key event input queue
static pthread_mutex_t key_queue_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t key_queue_cond = PTHREAD_COND_INITIALIZER;
static int key_queue[256], key_queue_len = 0;
static volatile char key_pressed[KEY_MAX + 1];
// Return the current time as a double (including fractions of a second).
static double now() {
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec + tv.tv_usec / 1000000.0;
}
// Draw the given frame over the installation overlay animation. The
// background is not cleared or draw with the base icon first; we
// assume that the frame already contains some other frame of the
// animation. Does nothing if no overlay animation is defined.
// Should only be called with gUpdateMutex locked.
static void draw_install_overlay_locked(int frame) {
if (gInstallationOverlay == NULL) return;
gr_surface surface = gInstallationOverlay[frame];
int iconWidth = gr_get_width(surface);
int iconHeight = gr_get_height(surface);
gr_blit(surface, 0, 0, iconWidth, iconHeight,
ui_parameters.install_overlay_offset_x,
ui_parameters.install_overlay_offset_y);
}
// Clear the screen and draw the currently selected background icon (if any).
// Should only be called with gUpdateMutex locked.
static void draw_background_locked(int icon)
{
gPagesIdentical = 0;
gr_color(0, 0, 0, 255);
gr_fill(0, 0, gr_fb_width(), gr_fb_height());
if (icon) {
gr_surface surface = gBackgroundIcon[icon];
int iconWidth = gr_get_width(surface);
int iconHeight = gr_get_height(surface);
int iconX = (gr_fb_width() - iconWidth) / 2;
int iconY = (gr_fb_height() - iconHeight) / 2;
gr_blit(surface, 0, 0, iconWidth, iconHeight, iconX, iconY);
if (icon == BACKGROUND_ICON_INSTALLING) {
draw_install_overlay_locked(gInstallingFrame);
}
}
}
// Draw the progress bar (if any) on the screen. Does not flip pages.
// Should only be called with gUpdateMutex locked.
static void draw_progress_locked()
{
if (gCurrentIcon == BACKGROUND_ICON_INSTALLING) {
draw_install_overlay_locked(gInstallingFrame);
}
if (gProgressBarType != PROGRESSBAR_TYPE_NONE) {
int iconHeight = gr_get_height(gBackgroundIcon[BACKGROUND_ICON_INSTALLING]);
int width = gr_get_width(gProgressBarEmpty);
int height = gr_get_height(gProgressBarEmpty);
int dx = (gr_fb_width() - width)/2;
int dy = (3*gr_fb_height() + iconHeight - 2*height)/4;
// Erase behind the progress bar (in case this was a progress-only update)
gr_color(0, 0, 0, 255);
gr_fill(dx, dy, width, height);
if (gProgressBarType == PROGRESSBAR_TYPE_NORMAL) {
float progress = gProgressScopeStart + gProgress * gProgressScopeSize;
int pos = (int) (progress * width);
if (pos > 0) {
gr_blit(gProgressBarFill, 0, 0, pos, height, dx, dy);
}
if (pos < width-1) {
gr_blit(gProgressBarEmpty, pos, 0, width-pos, height, dx+pos, dy);
}
}
if (gProgressBarType == PROGRESSBAR_TYPE_INDETERMINATE) {
static int frame = 0;
gr_blit(gProgressBarIndeterminate[frame], 0, 0, width, height, dx, dy);
frame = (frame + 1) % ui_parameters.indeterminate_frames;
}
}
}
static void draw_text_line(int row, const char* t) {
if (t[0] != '\0') {
gr_text(0, (row+1)*CHAR_HEIGHT-1, t);
}
}
//#define MENU_TEXT_COLOR 255, 160, 49, 255
#define MENU_TEXT_COLOR 0, 191, 255, 255
#define NORMAL_TEXT_COLOR 200, 200, 200, 255
#define HEADER_TEXT_COLOR NORMAL_TEXT_COLOR
// Redraw everything on the screen. Does not flip pages.
// Should only be called with gUpdateMutex locked.
static void draw_screen_locked(void)
{
if (!ui_has_initialized) return;
draw_background_locked(gCurrentIcon);
draw_progress_locked();
if (show_text) {
gr_color(0, 0, 0, 160);
gr_fill(0, 0, gr_fb_width(), gr_fb_height());
int total_rows = gr_fb_height() / CHAR_HEIGHT;
int i = 0;
int j = 0;
int offset = 0; // offset of separating bar under menus
int row = 0; // current row that we are drawing on
if (show_menu) {
gr_color(MENU_TEXT_COLOR);
gr_fill(0, (menu_top + menu_sel - menu_show_start) * CHAR_HEIGHT,
gr_fb_width(), (menu_top + menu_sel - menu_show_start + 1)*CHAR_HEIGHT+1);
gr_color(HEADER_TEXT_COLOR);
for (i = 0; i < menu_top; ++i) {
draw_text_line(i, menu[i]);
row++;
}
if (menu_items - menu_show_start + menu_top >= max_menu_rows)
j = max_menu_rows - menu_top;
else
j = menu_items - menu_show_start;
gr_color(MENU_TEXT_COLOR);
for (i = menu_show_start + menu_top; i < (menu_show_start + menu_top + j); ++i) {
if (i == menu_top + menu_sel) {
gr_color(255, 255, 255, 255);
draw_text_line(i - menu_show_start , menu[i]);
gr_color(MENU_TEXT_COLOR);
} else {
gr_color(MENU_TEXT_COLOR);
draw_text_line(i - menu_show_start, menu[i]);
}
row++;
if (row >= max_menu_rows)
break;
}
if (menu_items <= max_menu_rows)
offset = 1;
gr_fill(0, (row-offset)*CHAR_HEIGHT+CHAR_HEIGHT/2-1,
gr_fb_width(), (row-offset)*CHAR_HEIGHT+CHAR_HEIGHT/2+1);
}
gr_color(NORMAL_TEXT_COLOR);
int cur_row = text_row;
int available_rows = total_rows - row - 1;
int start_row = row + 1;
if (available_rows < MAX_ROWS)
cur_row = (cur_row + (MAX_ROWS - available_rows)) % MAX_ROWS;
else
start_row = total_rows - MAX_ROWS;
int r;
for (r = 0; r < (available_rows < MAX_ROWS ? available_rows : MAX_ROWS); r++) {
draw_text_line(start_row + r, text[(cur_row + r) % MAX_ROWS]);
}
}
}
// Redraw everything on the screen and flip the screen (make it visible).
// Should only be called with gUpdateMutex locked.
static void update_screen_locked(void)
{
if (!ui_has_initialized) return;
draw_screen_locked();
gr_flip();
}
// Updates only the progress bar, if possible, otherwise redraws the screen.
// Should only be called with gUpdateMutex locked.
static void update_progress_locked(void)
{
if (!ui_has_initialized) return;
if (show_text || !gPagesIdentical) {
draw_screen_locked(); // Must redraw the whole screen
gPagesIdentical = 1;
} else {
draw_progress_locked(); // Draw only the progress bar and overlays
}
gr_flip();
}
// Keeps the progress bar updated, even when the process is otherwise busy.
static void *progress_thread(void *cookie)
{
double interval = 1.0 / ui_parameters.update_fps;
for (;;) {
double start = now();
pthread_mutex_lock(&gUpdateMutex);
int redraw = 0;
// update the installation animation, if active
// skip this if we have a text overlay (too expensive to update)
if (gCurrentIcon == BACKGROUND_ICON_INSTALLING &&
ui_parameters.installing_frames > 0 &&
!show_text) {
gInstallingFrame =
(gInstallingFrame + 1) % ui_parameters.installing_frames;
redraw = 1;
}
// update the progress bar animation, if active
// skip this if we have a text overlay (too expensive to update)
if (gProgressBarType == PROGRESSBAR_TYPE_INDETERMINATE && !show_text) {
redraw = 1;
}
// move the progress bar forward on timed intervals, if configured
int duration = gProgressScopeDuration;
if (gProgressBarType == PROGRESSBAR_TYPE_NORMAL && duration > 0) {
double elapsed = now() - gProgressScopeTime;
float progress = 1.0 * elapsed / duration;
if (progress > 1.0) progress = 1.0;
if (progress > gProgress) {
gProgress = progress;
redraw = 1;
}
}
if (redraw) update_progress_locked();
pthread_mutex_unlock(&gUpdateMutex);
double end = now();
// minimum of 20ms delay between frames
double delay = interval - (end-start);
if (delay < 0.02) delay = 0.02;
usleep((long)(delay * 1000000));
}
return NULL;
}
static int rel_sum = 0;
static int input_callback(int fd, short revents, void *data)
{
struct input_event ev;
int ret;
int fake_key = 0;
ret = ev_get_input(fd, revents, &ev);
if (ret)
return -1;
if (ev.type == EV_SYN) {
return 0;
} else if (ev.type == EV_REL) {
if (ev.code == REL_Y) {
// accumulate the up or down motion reported by
// the trackball. When it exceeds a threshold
// (positive or negative), fake an up/down
// key event.
rel_sum += ev.value;
if (rel_sum > 3) {
fake_key = 1;
ev.type = EV_KEY;
ev.code = KEY_DOWN;
ev.value = 1;
rel_sum = 0;
} else if (rel_sum < -3) {
fake_key = 1;
ev.type = EV_KEY;
ev.code = KEY_UP;
ev.value = 1;
rel_sum = 0;
}
}
} else {
rel_sum = 0;
}
if (ev.type != EV_KEY || ev.code > KEY_MAX)
return 0;
pthread_mutex_lock(&key_queue_mutex);
if (!fake_key) {
// our "fake" keys only report a key-down event (no
// key-up), so don't record them in the key_pressed
// table.
key_pressed[ev.code] = ev.value;
}
const int queue_max = sizeof(key_queue) / sizeof(key_queue[0]);
if (ev.value > 0 && key_queue_len < queue_max) {
key_queue[key_queue_len++] = ev.code;
pthread_cond_signal(&key_queue_cond);
}
pthread_mutex_unlock(&key_queue_mutex);
if (ev.value > 0 && device_toggle_display(key_pressed, ev.code)) {
pthread_mutex_lock(&gUpdateMutex);
show_text = !show_text;
if (show_text) show_text_ever = 1;
update_screen_locked();
pthread_mutex_unlock(&gUpdateMutex);
}
if (ev.value > 0 && device_reboot_now(key_pressed, ev.code)) {
android_reboot(ANDROID_RB_RESTART, 0, 0);
}
return 0;
}
// Reads input events, handles special hot keys, and adds to the key queue.
static void *input_thread(void *cookie)
{
for (;;) {
if (!ev_wait(-1))
ev_dispatch();
}
return NULL;
}
void ui_init(void)
{
ui_has_initialized = 1;
gr_init();
ev_init(input_callback, NULL);
text_col = text_row = 0;
text_rows = gr_fb_height() / CHAR_HEIGHT;
max_menu_rows = text_rows - MIN_LOG_ROWS;
if (max_menu_rows > MENU_MAX_ROWS)
max_menu_rows = MENU_MAX_ROWS;
if (text_rows > MAX_ROWS) text_rows = MAX_ROWS;
text_top = 1;
text_cols = gr_fb_width() / CHAR_WIDTH;
if (text_cols > MAX_COLS - 1) text_cols = MAX_COLS - 1;
int i;
for (i = 0; BITMAPS[i].name != NULL; ++i) {
int result = res_create_surface(BITMAPS[i].name, BITMAPS[i].surface);
if (result < 0) {
LOGE("Missing bitmap %s\n(Code %d)\n", BITMAPS[i].name, result);
}
}
gProgressBarIndeterminate = malloc(ui_parameters.indeterminate_frames *
sizeof(gr_surface));
for (i = 0; i < ui_parameters.indeterminate_frames; ++i) {
char filename[40];
// "indeterminate01.png", "indeterminate02.png", ...
sprintf(filename, "indeterminate%02d", i+1);
int result = res_create_surface(filename, gProgressBarIndeterminate+i);
if (result < 0) {
LOGE("Missing bitmap %s\n(Code %d)\n", filename, result);
}
}
if (ui_parameters.installing_frames > 0) {
gInstallationOverlay = malloc(ui_parameters.installing_frames *
sizeof(gr_surface));
for (i = 0; i < ui_parameters.installing_frames; ++i) {
char filename[40];
// "icon_installing_overlay01.png",
// "icon_installing_overlay02.png", ...
sprintf(filename, "icon_installing_overlay%02d", i+1);
int result = res_create_surface(filename, gInstallationOverlay+i);
if (result < 0) {
LOGE("Missing bitmap %s\n(Code %d)\n", filename, result);
}
}
// Adjust the offset to account for the positioning of the
// base image on the screen.
if (gBackgroundIcon[BACKGROUND_ICON_INSTALLING] != NULL) {
gr_surface bg = gBackgroundIcon[BACKGROUND_ICON_INSTALLING];
ui_parameters.install_overlay_offset_x +=
(gr_fb_width() - gr_get_width(bg)) / 2;
ui_parameters.install_overlay_offset_y +=
(gr_fb_height() - gr_get_height(bg)) / 2;
}
} else {
gInstallationOverlay = NULL;
}
pthread_t t;
pthread_create(&t, NULL, progress_thread, NULL);
pthread_create(&t, NULL, input_thread, NULL);
}
char *ui_copy_image(int icon, int *width, int *height, int *bpp) {
pthread_mutex_lock(&gUpdateMutex);
draw_background_locked(gBackgroundIcon[icon]);
*width = gr_fb_width();
*height = gr_fb_height();
*bpp = sizeof(gr_pixel) * 8;
int size = *width * *height * sizeof(gr_pixel);
char *ret = malloc(size);
if (ret == NULL) {
LOGE("Can't allocate %d bytes for image\n", size);
} else {
memcpy(ret, gr_fb_data(), size);
}
pthread_mutex_unlock(&gUpdateMutex);
return ret;
}
void ui_set_background(int icon)
{
pthread_mutex_lock(&gUpdateMutex);
gCurrentIcon = icon;
update_screen_locked();
pthread_mutex_unlock(&gUpdateMutex);
}
void ui_show_indeterminate_progress()
{
pthread_mutex_lock(&gUpdateMutex);
if (gProgressBarType != PROGRESSBAR_TYPE_INDETERMINATE) {
gProgressBarType = PROGRESSBAR_TYPE_INDETERMINATE;
update_progress_locked();
}
pthread_mutex_unlock(&gUpdateMutex);
}
void ui_show_progress(float portion, int seconds)
{
pthread_mutex_lock(&gUpdateMutex);
gProgressBarType = PROGRESSBAR_TYPE_NORMAL;
gProgressScopeStart += gProgressScopeSize;
gProgressScopeSize = portion;
gProgressScopeTime = now();
gProgressScopeDuration = seconds;
gProgress = 0;
update_progress_locked();
pthread_mutex_unlock(&gUpdateMutex);
}
void ui_set_progress(float fraction)
{
pthread_mutex_lock(&gUpdateMutex);
if (fraction < 0.0) fraction = 0.0;
if (fraction > 1.0) fraction = 1.0;
if (gProgressBarType == PROGRESSBAR_TYPE_NORMAL && fraction > gProgress) {
// Skip updates that aren't visibly different.
int width = gr_get_width(gProgressBarIndeterminate[0]);
float scale = width * gProgressScopeSize;
if ((int) (gProgress * scale) != (int) (fraction * scale)) {
gProgress = fraction;
update_progress_locked();
}
}
pthread_mutex_unlock(&gUpdateMutex);
}
void ui_reset_progress()
{
pthread_mutex_lock(&gUpdateMutex);
gProgressBarType = PROGRESSBAR_TYPE_NONE;
gProgressScopeStart = gProgressScopeSize = 0;
gProgressScopeTime = gProgressScopeDuration = 0;
gProgress = 0;
update_screen_locked();
pthread_mutex_unlock(&gUpdateMutex);
}
void ui_print(const char *fmt, ...)
{
char buf[256];
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, 256, fmt, ap);
va_end(ap);
if (ui_log_stdout)
fputs(buf, stdout);
// This can get called before ui_init(), so be careful.
pthread_mutex_lock(&gUpdateMutex);
if (text_rows > 0 && text_cols > 0) {
char *ptr;
for (ptr = buf; *ptr != '\0'; ++ptr) {
if (*ptr == '\n' || text_col >= text_cols) {
text[text_row][text_col] = '\0';
text_col = 0;
text_row = (text_row + 1) % text_rows;
if (text_row == text_top) text_top = (text_top + 1) % text_rows;
}
if (*ptr != '\n') text[text_row][text_col++] = *ptr;
}
text[text_row][text_col] = '\0';
update_screen_locked();
}
pthread_mutex_unlock(&gUpdateMutex);
}
void ui_printlogtail(int nb_lines) {
char * log_data;
char tmp[PATH_MAX];
FILE * f;
int line=0;
//don't log output to recovery.log
ui_log_stdout=0;
sprintf(tmp, "tail -n %d /tmp/recovery.log > /tmp/tail.log", nb_lines);
__system(tmp);
f = fopen("/tmp/tail.log", "rb");
if (f != NULL) {
while (line < nb_lines) {
log_data = fgets(tmp, PATH_MAX, f);
if (log_data == NULL) break;
ui_print("%s", tmp);
line++;
}
fclose(f);
}
ui_log_stdout=1;
}
void ui_reset_text_col()
{
pthread_mutex_lock(&gUpdateMutex);
text_col = 0;
pthread_mutex_unlock(&gUpdateMutex);
}
#define MENU_ITEM_HEADER " - "
#define MENU_ITEM_HEADER_LENGTH strlen(MENU_ITEM_HEADER)
int ui_start_menu(char** headers, char** items, int initial_selection) {
int i;
pthread_mutex_lock(&gUpdateMutex);
if (text_rows > 0 && text_cols > 0) {
for (i = 0; i < text_rows; ++i) {
if (headers[i] == NULL) break;
strncpy(menu[i], headers[i], text_cols-1);
menu[i][text_cols-1] = '\0';
}
menu_top = i;
for (; i < MENU_MAX_ROWS; ++i) {
if (items[i-menu_top] == NULL) break;
strcpy(menu[i], MENU_ITEM_HEADER);
strncpy(menu[i] + MENU_ITEM_HEADER_LENGTH, items[i-menu_top], MENU_MAX_COLS - 1 - MENU_ITEM_HEADER_LENGTH);
menu[i][MENU_MAX_COLS-1] = '\0';
}
if (gShowBackButton && ui_menu_level > 0) {
strcpy(menu[i], " - +++++Go Back+++++");
++i;
}
strcpy(menu[i], " ");
++i;
menu_items = i - menu_top;
show_menu = 1;
menu_sel = menu_show_start = initial_selection;
update_screen_locked();
}
pthread_mutex_unlock(&gUpdateMutex);
if (gShowBackButton && ui_menu_level > 0) {
return menu_items - 1;
}
return menu_items;
}
int ui_menu_select(int sel) {
int old_sel;
pthread_mutex_lock(&gUpdateMutex);
if (show_menu > 0) {
old_sel = menu_sel;
menu_sel = sel;
if (menu_sel < 0) menu_sel = menu_items-1 + menu_sel;
if (menu_sel >= menu_items-1) menu_sel = menu_sel - menu_items+1;
if (menu_sel < menu_show_start && menu_show_start > 0) {
menu_show_start = menu_sel;
}
if (menu_sel - menu_show_start + menu_top >= max_menu_rows) {
menu_show_start = menu_sel + menu_top - max_menu_rows + 1;
}
sel = menu_sel;
if (menu_sel != old_sel) update_screen_locked();
}
pthread_mutex_unlock(&gUpdateMutex);
return sel;
}
void ui_end_menu() {
int i;
pthread_mutex_lock(&gUpdateMutex);
if (show_menu > 0 && text_rows > 0 && text_cols > 0) {
show_menu = 0;
update_screen_locked();
}
pthread_mutex_unlock(&gUpdateMutex);
}
int ui_text_visible()
{
pthread_mutex_lock(&gUpdateMutex);
int visible = show_text;
pthread_mutex_unlock(&gUpdateMutex);
return visible;
}
int ui_text_ever_visible()
{
pthread_mutex_lock(&gUpdateMutex);
int ever_visible = show_text_ever;
pthread_mutex_unlock(&gUpdateMutex);
return ever_visible;
}
void ui_show_text(int visible)
{
pthread_mutex_lock(&gUpdateMutex);
show_text = visible;
if (show_text) show_text_ever = 1;
update_screen_locked();
pthread_mutex_unlock(&gUpdateMutex);
}
// Return true if USB is connected.
static int usb_connected() {
int fd = open("/sys/class/android_usb/android0/state", O_RDONLY);
if (fd < 0) {
printf("failed to open /sys/class/android_usb/android0/state: %s\n",
strerror(errno));
return 0;
}
char buf;
/* USB is connected if android_usb state is CONNECTED or CONFIGURED */
int connected = (read(fd, &buf, 1) == 1) && (buf == 'C');
if (close(fd) < 0) {
printf("failed to close /sys/class/android_usb/android0/state: %s\n",
strerror(errno));
}
return connected;
}
int ui_wait_key()
{
pthread_mutex_lock(&key_queue_mutex);
// Time out after UI_WAIT_KEY_TIMEOUT_SEC, unless a USB cable is
// plugged in.
do {
struct timeval now;
struct timespec timeout;
gettimeofday(&now, NULL);
timeout.tv_sec = now.tv_sec;
timeout.tv_nsec = now.tv_usec * 1000;
timeout.tv_sec += UI_WAIT_KEY_TIMEOUT_SEC;
int rc = 0;
while (key_queue_len == 0 && rc != ETIMEDOUT) {
rc = pthread_cond_timedwait(&key_queue_cond, &key_queue_mutex,
&timeout);
}
} while (usb_connected() && key_queue_len == 0);
int key = -1;
if (key_queue_len > 0) {
key = key_queue[0];
memcpy(&key_queue[0], &key_queue[1], sizeof(int) * --key_queue_len);
}
pthread_mutex_unlock(&key_queue_mutex);
return key;
}
int ui_key_pressed(int key)
{
// This is a volatile static array, don't bother locking
return key_pressed[key];
}
void ui_clear_key_queue() {
pthread_mutex_lock(&key_queue_mutex);
key_queue_len = 0;
pthread_mutex_unlock(&key_queue_mutex);
}
void ui_set_show_text(int value) {
show_text = value;
}
void ui_set_showing_back_button(int showBackButton) {
gShowBackButton = showBackButton;
}
int ui_get_showing_back_button() {
return gShowBackButton;
}
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