Move default implementations into Device.

The current abstract class was a nice idea but has led to a lot of
copy & paste in practice. Right now, no one we know of has any extra
menu items, so let's make the default menu available to everyone.

(If we assume that someone somewhere really does need custom
device-specific menu options, a better API would let them add to
our menu rather than replacing it.)

Change-Id: I59f6a92f3ecd830c2ce78ce9da19eaaf472c5dfa

Android.mk

@@ -30,16 +30,17 @@ include $(BUILD_STATIC_LIBRARY)
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := \
-    recovery.cpp \
-    bootloader.cpp \
-    install.cpp \
-    roots.cpp \
-    ui.cpp \
-    screen_ui.cpp \
-    asn1_decoder.cpp \
-    verifier.cpp \
     adb_install.cpp \
-    fuse_sdcard_provider.c
+    asn1_decoder.cpp \
+    bootloader.cpp \
+    device.cpp \
+    fuse_sdcard_provider.c \
+    install.cpp \
+    recovery.cpp \
+    roots.cpp \
+    screen_ui.cpp \
+    ui.cpp \
+    verifier.cpp \
 
 LOCAL_MODULE := recovery
 

default_device.cpp

@@ -14,39 +14,15 @@
  * limitations under the License.
  */
 
-#include <linux/input.h>
-
-#include "common.h"
 #include "device.h"
 #include "screen_ui.h"
 
-static const char* HEADERS[] = {
-    "Volume up/down to move highlight.",
-    "Power button to select.",
-    "",
-    NULL
-};
-
-static const char* ITEMS[] = {
-    "Reboot system now",
-    "Reboot to bootloader",
-    "Apply update from ADB",
-    "Apply update from SD card",
-    "Wipe data/factory reset",
-    "Wipe cache partition",
-    "View recovery logs",
-    "Power off",
-    NULL
-};
-
 class DefaultDevice : public Device {
  public:
-    DefaultDevice() :
-        ui(new ScreenRecoveryUI) {
+  DefaultDevice() : Device(new ScreenRecoveryUI) {
   }
 
-    RecoveryUI* GetUI() { return ui; }
-
+  // TODO: make this handle more cases, and move the default implementation into Device too.
   int HandleMenuKey(int key, int visible) {
     if (visible) {
       switch (key) {
@@ -66,28 +42,8 @@ class DefaultDevice : public Device {
 
     return kNoAction;
   }
-
-    BuiltinAction InvokeMenuItem(int menu_position) {
-        switch (menu_position) {
-          case 0: return REBOOT;
-          case 1: return REBOOT_BOOTLOADER;
-          case 2: return APPLY_ADB_SIDELOAD;
-          case 3: return APPLY_EXT;
-          case 4: return WIPE_DATA;
-          case 5: return WIPE_CACHE;
-          case 6: return READ_RECOVERY_LASTLOG;
-          case 7: return SHUTDOWN;
-          default: return NO_ACTION;
-        }
-    }
-
-    const char* const* GetMenuHeaders() { return HEADERS; }
-    const char* const* GetMenuItems() { return ITEMS; }
-
-  private:
-    RecoveryUI* ui;
 };
 
 Device* make_device() {
-    return new DefaultDevice();
+  return new DefaultDevice;
 }

device.cpp

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2015 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 "device.h"
+
+// TODO: this is a lie for, say, fugu.
+static const char* HEADERS[] = {
+    "Volume up/down to move highlight.",
+    "Power button to select.",
+    "",
+    NULL
+};
+
+static const char* ITEMS[] = {
+    "Reboot system now",
+    "Reboot to bootloader",
+    "Apply update from ADB",
+    "Apply update from SD card",
+    "Wipe data/factory reset",
+    "Wipe cache partition",
+    "View recovery logs",
+    "Power off",
+    NULL
+};
+
+const char* const* Device::GetMenuHeaders() { return HEADERS; }
+const char* const* Device::GetMenuItems() { return ITEMS; }
+
+Device::BuiltinAction Device::InvokeMenuItem(int menu_position) {
+  switch (menu_position) {
+    case 0: return REBOOT;
+    case 1: return REBOOT_BOOTLOADER;
+    case 2: return APPLY_ADB_SIDELOAD;
+    case 3: return APPLY_EXT;
+    case 4: return WIPE_DATA;
+    case 5: return WIPE_CACHE;
+    case 6: return READ_RECOVERY_LASTLOG;
+    case 7: return SHUTDOWN;
+    default: return NO_ACTION;
+  }
+}

device.h

@@ -21,13 +21,14 @@
 
 class Device {
   public:
+    Device(RecoveryUI* ui) : ui_(ui) { }
     virtual ~Device() { }
 
     // Called to obtain the UI object that should be used to display
     // the recovery user interface for this device.  You should not
     // have called Init() on the UI object already, the caller will do
     // that after this method returns.
-    virtual RecoveryUI* GetUI() = 0;
+    virtual RecoveryUI* GetUI() { return ui_; }
 
     // Called when recovery starts up (after the UI has been obtained
     // and initialized and after the arguments have been parsed, but
@@ -70,6 +71,17 @@ class Device {
                          APPLY_ADB_SIDELOAD, WIPE_DATA, WIPE_CACHE,
                          REBOOT_BOOTLOADER, SHUTDOWN, READ_RECOVERY_LASTLOG };
 
+    // Return the headers (an array of strings, one per line,
+    // NULL-terminated) for the main menu.  Typically these tell users
+    // what to push to move the selection and invoke the selected
+    // item.
+    virtual const char* const* GetMenuHeaders();
+
+    // Return the list of menu items (an array of strings,
+    // NULL-terminated).  The menu_position passed to InvokeMenuItem
+    // will correspond to the indexes into this array.
+    virtual const char* const* GetMenuItems();
+
     // Perform a recovery action selected from the menu.
     // 'menu_position' will be the item number of the selected menu
     // item, or a non-negative number returned from
@@ -79,7 +91,7 @@ class Device {
     // builtin actions, you can just return the corresponding enum
     // value.  If it is an action specific to your device, you
     // actually perform it here and return NO_ACTION.
-    virtual BuiltinAction InvokeMenuItem(int menu_position) = 0;
+    virtual BuiltinAction InvokeMenuItem(int menu_position);
 
     static const int kNoAction = -1;
     static const int kHighlightUp = -2;
@@ -94,16 +106,8 @@ class Device {
     // are erased AFTER this returns (whether it returns success or not).
     virtual int WipeData() { return 0; }
 
-    // Return the headers (an array of strings, one per line,
-    // NULL-terminated) for the main menu.  Typically these tell users
-    // what to push to move the selection and invoke the selected
-    // item.
-    virtual const char* const* GetMenuHeaders() = 0;
-
-    // Return the list of menu items (an array of strings,
-    // NULL-terminated).  The menu_position passed to InvokeMenuItem
-    // will correspond to the indexes into this array.
-    virtual const char* const* GetMenuItems() = 0;
+  private:
+    RecoveryUI* ui_;
 };
 
 // The device-specific library must define this function (or the