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platform_bootable_recovery/screen_ui.cpp
Sen Jiang d530449e54 Add a stub recovery UI. 
This allows recovery to work on devices without screen.
The stub recovery UI does nothing except print to stdout.

Test: write 'recovery\n--wipe_data\n--reason=wipe_data_from_ota\n'
      to misc and boot to recovery on a device without screen.
Bug: 33175036

Change-Id: Icde698aa2e2e29f4b3d0532dfd3c6a939ac2bc63
2016-12-13 13:29:33 -08:00

836 lines
26 KiB
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/*
* Copyright (C) 2011 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 <dirent.h>
#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 <vector>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/strings.h>
#include <android-base/stringprintf.h>
#include "common.h"
#include "device.h"
#include "minui/minui.h"
#include "screen_ui.h"
#include "ui.h"
#define TEXT_INDENT 4
// Return the current time as a double (including fractions of a second).
static double now() {
struct timeval tv;
gettimeofday(&tv, nullptr);
return tv.tv_sec + tv.tv_usec / 1000000.0;
}
ScreenRecoveryUI::ScreenRecoveryUI() :
currentIcon(NONE),
locale(nullptr),
progressBarType(EMPTY),
progressScopeStart(0),
progressScopeSize(0),
progress(0),
pagesIdentical(false),
text_cols_(0),
text_rows_(0),
text_(nullptr),
text_col_(0),
text_row_(0),
text_top_(0),
show_text(false),
show_text_ever(false),
menu_(nullptr),
show_menu(false),
menu_items(0),
menu_sel(0),
file_viewer_text_(nullptr),
intro_frames(0),
loop_frames(0),
current_frame(0),
intro_done(false),
animation_fps(30), // TODO: there's currently no way to infer this.
stage(-1),
max_stage(-1),
updateMutex(PTHREAD_MUTEX_INITIALIZER),
rtl_locale(false) {
}
GRSurface* ScreenRecoveryUI::GetCurrentFrame() {
if (currentIcon == INSTALLING_UPDATE || currentIcon == ERASING) {
return intro_done ? loopFrames[current_frame] : introFrames[current_frame];
}
return error_icon;
}
GRSurface* ScreenRecoveryUI::GetCurrentText() {
switch (currentIcon) {
case ERASING: return erasing_text;
case ERROR: return error_text;
case INSTALLING_UPDATE: return installing_text;
case NO_COMMAND: return no_command_text;
case NONE: abort();
}
}
int ScreenRecoveryUI::PixelsFromDp(int dp) {
return dp * density_;
}
// Here's the intended layout:
// | portrait large landscape large
// ---------+-------------------------------------------------
// gap | 220dp 366dp 142dp 284dp
// icon | (200dp)
// gap | 68dp 68dp 56dp 112dp
// text | (14sp)
// gap | 32dp 32dp 26dp 52dp
// progress | (2dp)
// gap | 194dp 340dp 131dp 262dp
// Note that "baseline" is actually the *top* of each icon (because that's how our drawing
// routines work), so that's the more useful measurement for calling code.
enum Layout { PORTRAIT = 0, PORTRAIT_LARGE = 1, LANDSCAPE = 2, LANDSCAPE_LARGE = 3, LAYOUT_MAX };
enum Dimension { PROGRESS = 0, TEXT = 1, ICON = 2, DIMENSION_MAX };
static constexpr int kLayouts[LAYOUT_MAX][DIMENSION_MAX] = {
{ 194, 32, 68, }, // PORTRAIT
{ 340, 32, 68, }, // PORTRAIT_LARGE
{ 131, 26, 56, }, // LANDSCAPE
{ 262, 52, 112, }, // LANDSCAPE_LARGE
};
int ScreenRecoveryUI::GetAnimationBaseline() {
return GetTextBaseline() - PixelsFromDp(kLayouts[layout_][ICON]) -
gr_get_height(loopFrames[0]);
}
int ScreenRecoveryUI::GetTextBaseline() {
return GetProgressBaseline() - PixelsFromDp(kLayouts[layout_][TEXT]) -
gr_get_height(installing_text);
}
int ScreenRecoveryUI::GetProgressBaseline() {
return gr_fb_height() - PixelsFromDp(kLayouts[layout_][PROGRESS]) -
gr_get_height(progressBarFill);
}
// Clear the screen and draw the currently selected background icon (if any).
// Should only be called with updateMutex locked.
void ScreenRecoveryUI::draw_background_locked() {
pagesIdentical = false;
gr_color(0, 0, 0, 255);
gr_clear();
if (currentIcon != NONE) {
if (max_stage != -1) {
int stage_height = gr_get_height(stageMarkerEmpty);
int stage_width = gr_get_width(stageMarkerEmpty);
int x = (gr_fb_width() - max_stage * gr_get_width(stageMarkerEmpty)) / 2;
int y = gr_fb_height() - stage_height;
for (int i = 0; i < max_stage; ++i) {
GRSurface* stage_surface = (i < stage) ? stageMarkerFill : stageMarkerEmpty;
gr_blit(stage_surface, 0, 0, stage_width, stage_height, x, y);
x += stage_width;
}
}
GRSurface* text_surface = GetCurrentText();
int text_x = (gr_fb_width() - gr_get_width(text_surface)) / 2;
int text_y = GetTextBaseline();
gr_color(255, 255, 255, 255);
gr_texticon(text_x, text_y, text_surface);
}
}
// Draws the animation and progress bar (if any) on the screen.
// Does not flip pages.
// Should only be called with updateMutex locked.
void ScreenRecoveryUI::draw_foreground_locked() {
if (currentIcon != NONE) {
GRSurface* frame = GetCurrentFrame();
int frame_width = gr_get_width(frame);
int frame_height = gr_get_height(frame);
int frame_x = (gr_fb_width() - frame_width) / 2;
int frame_y = GetAnimationBaseline();
gr_blit(frame, 0, 0, frame_width, frame_height, frame_x, frame_y);
}
if (progressBarType != EMPTY) {
int width = gr_get_width(progressBarEmpty);
int height = gr_get_height(progressBarEmpty);
int progress_x = (gr_fb_width() - width)/2;
int progress_y = GetProgressBaseline();
// Erase behind the progress bar (in case this was a progress-only update)
gr_color(0, 0, 0, 255);
gr_fill(progress_x, progress_y, width, height);
if (progressBarType == DETERMINATE) {
float p = progressScopeStart + progress * progressScopeSize;
int pos = (int) (p * width);
if (rtl_locale) {
// Fill the progress bar from right to left.
if (pos > 0) {
gr_blit(progressBarFill, width-pos, 0, pos, height,
progress_x+width-pos, progress_y);
}
if (pos < width-1) {
gr_blit(progressBarEmpty, 0, 0, width-pos, height, progress_x, progress_y);
}
} else {
// Fill the progress bar from left to right.
if (pos > 0) {
gr_blit(progressBarFill, 0, 0, pos, height, progress_x, progress_y);
}
if (pos < width-1) {
gr_blit(progressBarEmpty, pos, 0, width-pos, height,
progress_x+pos, progress_y);
}
}
}
}
}
void ScreenRecoveryUI::SetColor(UIElement e) {
switch (e) {
case INFO:
gr_color(249, 194, 0, 255);
break;
case HEADER:
gr_color(247, 0, 6, 255);
break;
case MENU:
case MENU_SEL_BG:
gr_color(0, 106, 157, 255);
break;
case MENU_SEL_BG_ACTIVE:
gr_color(0, 156, 100, 255);
break;
case MENU_SEL_FG:
gr_color(255, 255, 255, 255);
break;
case LOG:
gr_color(196, 196, 196, 255);
break;
case TEXT_FILL:
gr_color(0, 0, 0, 160);
break;
default:
gr_color(255, 255, 255, 255);
break;
}
}
void ScreenRecoveryUI::DrawHorizontalRule(int* y) {
SetColor(MENU);
*y += 4;
gr_fill(0, *y, gr_fb_width(), *y + 2);
*y += 4;
}
void ScreenRecoveryUI::DrawTextLine(int x, int* y, const char* line, bool bold) {
gr_text(gr_sys_font(), x, *y, line, bold);
*y += char_height_ + 4;
}
void ScreenRecoveryUI::DrawTextLines(int x, int* y, const char* const* lines) {
for (size_t i = 0; lines != nullptr && lines[i] != nullptr; ++i) {
DrawTextLine(x, y, lines[i], false);
}
}
static const char* REGULAR_HELP[] = {
"Use volume up/down and power.",
NULL
};
static const char* LONG_PRESS_HELP[] = {
"Any button cycles highlight.",
"Long-press activates.",
NULL
};
// Redraw everything on the screen. Does not flip pages.
// Should only be called with updateMutex locked.
void ScreenRecoveryUI::draw_screen_locked() {
if (!show_text) {
draw_background_locked();
draw_foreground_locked();
} else {
gr_color(0, 0, 0, 255);
gr_clear();
int y = 0;
if (show_menu) {
std::string recovery_fingerprint =
android::base::GetProperty("ro.bootimage.build.fingerprint", "");
SetColor(INFO);
DrawTextLine(TEXT_INDENT, &y, "Android Recovery", true);
for (auto& chunk : android::base::Split(recovery_fingerprint, ":")) {
DrawTextLine(TEXT_INDENT, &y, chunk.c_str(), false);
}
DrawTextLines(TEXT_INDENT, &y, HasThreeButtons() ? REGULAR_HELP : LONG_PRESS_HELP);
SetColor(HEADER);
DrawTextLines(TEXT_INDENT, &y, menu_headers_);
SetColor(MENU);
DrawHorizontalRule(&y);
y += 4;
for (int i = 0; i < menu_items; ++i) {
if (i == menu_sel) {
// Draw the highlight bar.
SetColor(IsLongPress() ? MENU_SEL_BG_ACTIVE : MENU_SEL_BG);
gr_fill(0, y - 2, gr_fb_width(), y + char_height_ + 2);
// Bold white text for the selected item.
SetColor(MENU_SEL_FG);
gr_text(gr_sys_font(), 4, y, menu_[i], true);
SetColor(MENU);
} else {
gr_text(gr_sys_font(), 4, y, menu_[i], false);
}
y += char_height_ + 4;
}
DrawHorizontalRule(&y);
}
// display from the bottom up, until we hit the top of the
// screen, the bottom of the menu, or we've displayed the
// entire text buffer.
SetColor(LOG);
int row = (text_top_ + text_rows_ - 1) % text_rows_;
size_t count = 0;
for (int ty = gr_fb_height() - char_height_;
ty >= y && count < text_rows_;
ty -= char_height_, ++count) {
gr_text(gr_sys_font(), 0, ty, text_[row], false);
--row;
if (row < 0) row = text_rows_ - 1;
}
}
}
// Redraw everything on the screen and flip the screen (make it visible).
// Should only be called with updateMutex locked.
void ScreenRecoveryUI::update_screen_locked() {
draw_screen_locked();
gr_flip();
}
// Updates only the progress bar, if possible, otherwise redraws the screen.
// Should only be called with updateMutex locked.
void ScreenRecoveryUI::update_progress_locked() {
if (show_text || !pagesIdentical) {
draw_screen_locked(); // Must redraw the whole screen
pagesIdentical = true;
} else {
draw_foreground_locked(); // Draw only the progress bar and overlays
}
gr_flip();
}
// Keeps the progress bar updated, even when the process is otherwise busy.
void* ScreenRecoveryUI::ProgressThreadStartRoutine(void* data) {
reinterpret_cast<ScreenRecoveryUI*>(data)->ProgressThreadLoop();
return nullptr;
}
void ScreenRecoveryUI::ProgressThreadLoop() {
double interval = 1.0 / animation_fps;
while (true) {
double start = now();
pthread_mutex_lock(&updateMutex);
bool redraw = false;
// update the installation animation, if active
// skip this if we have a text overlay (too expensive to update)
if ((currentIcon == INSTALLING_UPDATE || currentIcon == ERASING) && !show_text) {
if (!intro_done) {
if (current_frame == intro_frames - 1) {
intro_done = true;
current_frame = 0;
} else {
++current_frame;
}
} else {
current_frame = (current_frame + 1) % loop_frames;
}
redraw = true;
}
// move the progress bar forward on timed intervals, if configured
int duration = progressScopeDuration;
if (progressBarType == DETERMINATE && duration > 0) {
double elapsed = now() - progressScopeTime;
float p = 1.0 * elapsed / duration;
if (p > 1.0) p = 1.0;
if (p > progress) {
progress = p;
redraw = true;
}
}
if (redraw) update_progress_locked();
pthread_mutex_unlock(&updateMutex);
double end = now();
// minimum of 20ms delay between frames
double delay = interval - (end-start);
if (delay < 0.02) delay = 0.02;
usleep(static_cast<useconds_t>(delay * 1000000));
}
}
void ScreenRecoveryUI::LoadBitmap(const char* filename, GRSurface** surface) {
int result = res_create_display_surface(filename, surface);
if (result < 0) {
LOG(ERROR) << "couldn't load bitmap " << filename << " (error " << result << ")";
}
}
void ScreenRecoveryUI::LoadLocalizedBitmap(const char* filename, GRSurface** surface) {
int result = res_create_localized_alpha_surface(filename, locale, surface);
if (result < 0) {
LOG(ERROR) << "couldn't load bitmap " << filename << " (error " << result << ")";
}
}
static char** Alloc2d(size_t rows, size_t cols) {
char** result = new char*[rows];
for (size_t i = 0; i < rows; ++i) {
result[i] = new char[cols];
memset(result[i], 0, cols);
}
return result;
}
// Choose the right background string to display during update.
void ScreenRecoveryUI::SetSystemUpdateText(bool security_update) {
if (security_update) {
LoadLocalizedBitmap("installing_security_text", &installing_text);
} else {
LoadLocalizedBitmap("installing_text", &installing_text);
}
Redraw();
}
bool ScreenRecoveryUI::InitTextParams() {
if (gr_init() < 0) {
return false;
}
gr_font_size(gr_sys_font(), &char_width_, &char_height_);
text_rows_ = gr_fb_height() / char_height_;
text_cols_ = gr_fb_width() / char_width_;
return true;
}
bool ScreenRecoveryUI::Init() {
RecoveryUI::Init();
if (!InitTextParams()) {
return false;
}
density_ = static_cast<float>(android::base::GetIntProperty("ro.sf.lcd_density", 160)) / 160.f;
// Are we portrait or landscape?
layout_ = (gr_fb_width() > gr_fb_height()) ? LANDSCAPE : PORTRAIT;
// Are we the large variant of our base layout?
if (gr_fb_height() > PixelsFromDp(800)) ++layout_;
text_ = Alloc2d(text_rows_, text_cols_ + 1);
file_viewer_text_ = Alloc2d(text_rows_, text_cols_ + 1);
menu_ = Alloc2d(text_rows_, text_cols_ + 1);
text_col_ = text_row_ = 0;
text_top_ = 1;
LoadBitmap("icon_error", &error_icon);
LoadBitmap("progress_empty", &progressBarEmpty);
LoadBitmap("progress_fill", &progressBarFill);
LoadBitmap("stage_empty", &stageMarkerEmpty);
LoadBitmap("stage_fill", &stageMarkerFill);
// Background text for "installing_update" could be "installing update"
// or "installing security update". It will be set after UI init according
// to commands in BCB.
installing_text = nullptr;
LoadLocalizedBitmap("erasing_text", &erasing_text);
LoadLocalizedBitmap("no_command_text", &no_command_text);
LoadLocalizedBitmap("error_text", &error_text);
LoadAnimation();
pthread_create(&progress_thread_, nullptr, ProgressThreadStartRoutine, this);
return true;
}
void ScreenRecoveryUI::LoadAnimation() {
std::unique_ptr<DIR, decltype(&closedir)> dir(opendir("/res/images"), closedir);
dirent* de;
std::vector<std::string> intro_frame_names;
std::vector<std::string> loop_frame_names;
while ((de = readdir(dir.get())) != nullptr) {
int value, num_chars;
if (sscanf(de->d_name, "intro%d%n.png", &value, &num_chars) == 1) {
intro_frame_names.emplace_back(de->d_name, num_chars);
} else if (sscanf(de->d_name, "loop%d%n.png", &value, &num_chars) == 1) {
loop_frame_names.emplace_back(de->d_name, num_chars);
}
}
intro_frames = intro_frame_names.size();
loop_frames = loop_frame_names.size();
// It's okay to not have an intro.
if (intro_frames == 0) intro_done = true;
// But you must have an animation.
if (loop_frames == 0) abort();
std::sort(intro_frame_names.begin(), intro_frame_names.end());
std::sort(loop_frame_names.begin(), loop_frame_names.end());
introFrames = new GRSurface*[intro_frames];
for (size_t i = 0; i < intro_frames; i++) {
LoadBitmap(intro_frame_names.at(i).c_str(), &introFrames[i]);
}
loopFrames = new GRSurface*[loop_frames];
for (size_t i = 0; i < loop_frames; i++) {
LoadBitmap(loop_frame_names.at(i).c_str(), &loopFrames[i]);
}
}
void ScreenRecoveryUI::SetLocale(const char* new_locale) {
this->locale = new_locale;
this->rtl_locale = false;
if (locale) {
char* lang = strdup(locale);
for (char* p = lang; *p; ++p) {
if (*p == '_') {
*p = '\0';
break;
}
}
// A bit cheesy: keep an explicit list of supported RTL languages.
if (strcmp(lang, "ar") == 0 || // Arabic
strcmp(lang, "fa") == 0 || // Persian (Farsi)
strcmp(lang, "he") == 0 || // Hebrew (new language code)
strcmp(lang, "iw") == 0 || // Hebrew (old language code)
strcmp(lang, "ur") == 0) { // Urdu
rtl_locale = true;
}
free(lang);
}
}
void ScreenRecoveryUI::SetBackground(Icon icon) {
pthread_mutex_lock(&updateMutex);
currentIcon = icon;
update_screen_locked();
pthread_mutex_unlock(&updateMutex);
}
void ScreenRecoveryUI::SetProgressType(ProgressType type) {
pthread_mutex_lock(&updateMutex);
if (progressBarType != type) {
progressBarType = type;
}
progressScopeStart = 0;
progressScopeSize = 0;
progress = 0;
update_progress_locked();
pthread_mutex_unlock(&updateMutex);
}
void ScreenRecoveryUI::ShowProgress(float portion, float seconds) {
pthread_mutex_lock(&updateMutex);
progressBarType = DETERMINATE;
progressScopeStart += progressScopeSize;
progressScopeSize = portion;
progressScopeTime = now();
progressScopeDuration = seconds;
progress = 0;
update_progress_locked();
pthread_mutex_unlock(&updateMutex);
}
void ScreenRecoveryUI::SetProgress(float fraction) {
pthread_mutex_lock(&updateMutex);
if (fraction < 0.0) fraction = 0.0;
if (fraction > 1.0) fraction = 1.0;
if (progressBarType == DETERMINATE && fraction > progress) {
// Skip updates that aren't visibly different.
int width = gr_get_width(progressBarEmpty);
float scale = width * progressScopeSize;
if ((int) (progress * scale) != (int) (fraction * scale)) {
progress = fraction;
update_progress_locked();
}
}
pthread_mutex_unlock(&updateMutex);
}
void ScreenRecoveryUI::SetStage(int current, int max) {
pthread_mutex_lock(&updateMutex);
stage = current;
max_stage = max;
pthread_mutex_unlock(&updateMutex);
}
void ScreenRecoveryUI::PrintV(const char* fmt, bool copy_to_stdout, va_list ap) {
std::string str;
android::base::StringAppendV(&str, fmt, ap);
if (copy_to_stdout) {
fputs(str.c_str(), stdout);
}
pthread_mutex_lock(&updateMutex);
if (text_rows_ > 0 && text_cols_ > 0) {
for (const char* ptr = str.c_str(); *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(&updateMutex);
}
void ScreenRecoveryUI::Print(const char* fmt, ...) {
va_list ap;
va_start(ap, fmt);
PrintV(fmt, true, ap);
va_end(ap);
}
void ScreenRecoveryUI::PrintOnScreenOnly(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
PrintV(fmt, false, ap);
va_end(ap);
}
void ScreenRecoveryUI::PutChar(char ch) {
pthread_mutex_lock(&updateMutex);
if (ch != '\n') text_[text_row_][text_col_++] = ch;
if (ch == '\n' || text_col_ >= text_cols_) {
text_col_ = 0;
++text_row_;
if (text_row_ == text_top_) text_top_ = (text_top_ + 1) % text_rows_;
}
pthread_mutex_unlock(&updateMutex);
}
void ScreenRecoveryUI::ClearText() {
pthread_mutex_lock(&updateMutex);
text_col_ = 0;
text_row_ = 0;
text_top_ = 1;
for (size_t i = 0; i < text_rows_; ++i) {
memset(text_[i], 0, text_cols_ + 1);
}
pthread_mutex_unlock(&updateMutex);
}
void ScreenRecoveryUI::ShowFile(FILE* fp) {
std::vector<off_t> offsets;
offsets.push_back(ftello(fp));
ClearText();
struct stat sb;
fstat(fileno(fp), &sb);
bool show_prompt = false;
while (true) {
if (show_prompt) {
PrintOnScreenOnly("--(%d%% of %d bytes)--",
static_cast<int>(100 * (double(ftello(fp)) / double(sb.st_size))),
static_cast<int>(sb.st_size));
Redraw();
while (show_prompt) {
show_prompt = false;
int key = WaitKey();
if (key == KEY_POWER || key == KEY_ENTER) {
return;
} else if (key == KEY_UP || key == KEY_VOLUMEUP) {
if (offsets.size() <= 1) {
show_prompt = true;
} else {
offsets.pop_back();
fseek(fp, offsets.back(), SEEK_SET);
}
} else {
if (feof(fp)) {
return;
}
offsets.push_back(ftello(fp));
}
}
ClearText();
}
int ch = getc(fp);
if (ch == EOF) {
while (text_row_ < text_rows_ - 1) PutChar('\n');
show_prompt = true;
} else {
PutChar(ch);
if (text_col_ == 0 && text_row_ >= text_rows_ - 1) {
show_prompt = true;
}
}
}
}
void ScreenRecoveryUI::ShowFile(const char* filename) {
FILE* fp = fopen_path(filename, "re");
if (fp == nullptr) {
Print(" Unable to open %s: %s\n", filename, strerror(errno));
return;
}
char** old_text = text_;
size_t old_text_col = text_col_;
size_t old_text_row = text_row_;
size_t old_text_top = text_top_;
// Swap in the alternate screen and clear it.
text_ = file_viewer_text_;
ClearText();
ShowFile(fp);
fclose(fp);
text_ = old_text;
text_col_ = old_text_col;
text_row_ = old_text_row;
text_top_ = old_text_top;
}
void ScreenRecoveryUI::StartMenu(const char* const * headers, const char* const * items,
int initial_selection) {
pthread_mutex_lock(&updateMutex);
if (text_rows_ > 0 && text_cols_ > 0) {
menu_headers_ = headers;
size_t i = 0;
for (; i < text_rows_ && items[i] != nullptr; ++i) {
strncpy(menu_[i], items[i], text_cols_ - 1);
menu_[i][text_cols_ - 1] = '\0';
}
menu_items = i;
show_menu = true;
menu_sel = initial_selection;
update_screen_locked();
}
pthread_mutex_unlock(&updateMutex);
}
int ScreenRecoveryUI::SelectMenu(int sel) {
pthread_mutex_lock(&updateMutex);
if (show_menu) {
int old_sel = menu_sel;
menu_sel = sel;
// Wrap at top and bottom.
if (menu_sel < 0) menu_sel = menu_items - 1;
if (menu_sel >= menu_items) menu_sel = 0;
sel = menu_sel;
if (menu_sel != old_sel) update_screen_locked();
}
pthread_mutex_unlock(&updateMutex);
return sel;
}
void ScreenRecoveryUI::EndMenu() {
pthread_mutex_lock(&updateMutex);
if (show_menu && text_rows_ > 0 && text_cols_ > 0) {
show_menu = false;
update_screen_locked();
}
pthread_mutex_unlock(&updateMutex);
}
bool ScreenRecoveryUI::IsTextVisible() {
pthread_mutex_lock(&updateMutex);
int visible = show_text;
pthread_mutex_unlock(&updateMutex);
return visible;
}
bool ScreenRecoveryUI::WasTextEverVisible() {
pthread_mutex_lock(&updateMutex);
int ever_visible = show_text_ever;
pthread_mutex_unlock(&updateMutex);
return ever_visible;
}
void ScreenRecoveryUI::ShowText(bool visible) {
pthread_mutex_lock(&updateMutex);
show_text = visible;
if (show_text) show_text_ever = true;
update_screen_locked();
pthread_mutex_unlock(&updateMutex);
}
void ScreenRecoveryUI::Redraw() {
pthread_mutex_lock(&updateMutex);
update_screen_locked();
pthread_mutex_unlock(&updateMutex);
}
void ScreenRecoveryUI::KeyLongPress(int) {
// Redraw so that if we're in the menu, the highlight
// will change color to indicate a successful long press.
Redraw();
}
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