refactor ui functions into a class

Move all the functions in ui.c to be members of a ScreenRecoveryUI
class, which is a subclass of an abstract RecoveryUI class.  Recovery
then creates a global singleton instance of this class and then invoke
the methods to drive the UI.  We use this to allow substitution of a
different RecoveryUI implementation for devices with radically
different form factors (eg, that don't have a screen).

Change-Id: I76bdd34eca506149f4cc07685df6a4890473f3d9

1 files changed, 121 insertions, 0 deletions

diff --git a/screen_ui.h b/screen_ui.h
new file mode 100644
index 0000000..544f154
--- /dev/null
+++ b/screen_ui.h
@@ -0,0 +1,121 @@
+/*
+ * 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.
+ */
+
+#ifndef RECOVERY_SCREEN_UI_H
+#define RECOVERY_SCREEN_UI_H
+
+#include <pthread.h>
+
+#include "ui.h"
+#include "minui/minui.h"
+
+// Implementation of RecoveryUI appropriate for devices with a screen
+// (shows an icon + a progress bar, text logging, menu, etc.)
+class ScreenRecoveryUI : public RecoveryUI {
+  public:
+    ScreenRecoveryUI();
+
+    void Init();
+
+    // overall recovery state ("background image")
+    void SetBackground(Icon icon);
+
+    // progress indicator
+    void SetProgressType(ProgressType type);
+    void ShowProgress(float portion, float seconds);
+    void SetProgress(float fraction);
+
+    // text log
+    void ShowText(bool visible);
+    bool IsTextVisible();
+    bool WasTextEverVisible();
+
+    // key handling
+    int WaitKey();
+    bool IsKeyPressed(int key);
+    void FlushKeys();
+
+    // printing messages
+    void Print(const char* fmt, ...); // __attribute__((format(printf, 1, 2)));
+
+    // menu display
+    void StartMenu(const char* const * headers, const char* const * items,
+                           int initial_selection);
+    int SelectMenu(int sel);
+    void EndMenu();
+
+  private:
+    Icon currentIcon;
+    int installingFrame;
+
+    pthread_mutex_t updateMutex;
+    gr_surface backgroundIcon[3];
+    gr_surface *installationOverlay;
+    gr_surface *progressBarIndeterminate;
+    gr_surface progressBarEmpty;
+    gr_surface progressBarFill;
+
+    ProgressType progressBarType;
+
+    float progressScopeStart, progressScopeSize, progress;
+    double progressScopeTime, progressScopeDuration;
+
+    // true when both graphics pages are the same (except for the
+    // progress bar)
+    bool pagesIdentical;
+
+    static const int kMaxCols = 96;
+    static const int kMaxRows = 32;
+
+    // Log text overlay, displayed when a magic key is pressed
+    char text[kMaxRows][kMaxCols];
+    int text_cols, text_rows;
+    int text_col, text_row, text_top;
+    bool show_text;
+    bool show_text_ever;   // has show_text ever been true?
+
+    char menu[kMaxRows][kMaxCols];
+    bool show_menu;
+    int menu_top, menu_items, menu_sel;
+
+    // Key event input queue
+    pthread_mutex_t key_queue_mutex;
+    pthread_cond_t key_queue_cond;
+    int key_queue[256], key_queue_len;
+    volatile char key_pressed[KEY_MAX + 1];
+    int rel_sum;
+
+    pthread_t progress_t;
+    pthread_t input_t;
+
+    void draw_install_overlay_locked(int frame);
+    void draw_background_locked(Icon icon);
+    void draw_progress_locked();
+    void draw_text_line(int row, const char* t);
+    void draw_screen_locked();
+    void update_screen_locked();
+    void update_progress_locked();
+    static void* progress_thread(void* cookie);
+    static int input_callback(int fd, short revents, void* data);
+    static void* input_thread(void* cookie);
+
+    bool usb_connected();
+
+    void LoadBitmap(const char* filename, gr_surface* surface);
+
+};
+
+#endif  // RECOVERY_UI_H