Allow customizing WearRecoveryUI via Makefile variables.

With the following Makefile variables, we can reduce the work of writing
(copy/pasting) device-specific WearRecoveryUI classes.

The list of Makefile variables (the ones useful for Wear devices):
- TARGET_RECOVERY_UI_MARGIN_HEIGHT (default: 0)
- TARGET_RECOVERY_UI_MARGIN_WIDTH (default: 0)
  Specify the margin space that we don't want to display texts. They
  replace the former outer_width and outer_height.

- TARGET_RECOVERY_UI_TOUCH_LOW_THRESHOLD (default: 50)
- TARGET_RECOVERY_UI_TOUCH_HIGH_THRESHOLD (default: 90)
  Specify the sensitivity of recognizing a swipe. Devices give absolute
  positions, so for some devices we need to adjust the thresholds.

- TARGET_RECOVERY_UI_PROGRESS_BAR_BASELINE
  Specify the progress bar vertical position, which should be adjusted
  to the actual height of a device. It replaces the former
  progress_bar_y.

- TARGET_RECOVERY_UI_ANIMATION_FPS (default: 30)
  Specify the animation FPS if using device-specific animation images.
  It replaces the former animation_fps.

Devices can specify "TARGET_RECOVERY_UI_LIB := librecovery_ui_wear",
with optionally defined Makefile vars above, in BoardConfig.mk to
customize their WearRecoveryUI.

Also remove the obsolete wear_touch.{cpp,h}, which has been merged into
ui.cpp in commit 5f8dd99.

Bug: 64307776
Test: Change the device BoardConfig.mk and test recovery image.
Change-Id: Id0fb2d4e3977ab5ddd31e71f9535470cab70e41b
(cherry picked from commit 0470cee)

Android.mk

@@ -79,7 +79,6 @@ LOCAL_SRC_FILES := \
     ui.cpp \
     vr_ui.cpp \
     wear_ui.cpp \
-    wear_touch.cpp \
 
 LOCAL_MODULE := recovery
 
@@ -120,6 +119,18 @@ else
 LOCAL_CFLAGS += -DRECOVERY_UI_TOUCH_HIGH_THRESHOLD=90
 endif
 
+ifneq ($(TARGET_RECOVERY_UI_PROGRESS_BAR_BASELINE),)
+LOCAL_CFLAGS += -DRECOVERY_UI_PROGRESS_BAR_BASELINE=$(TARGET_RECOVERY_UI_PROGRESS_BAR_BASELINE)
+else
+LOCAL_CFLAGS += -DRECOVERY_UI_PROGRESS_BAR_BASELINE=259
+endif
+
+ifneq ($(TARGET_RECOVERY_UI_ANIMATION_FPS),)
+LOCAL_CFLAGS += -DRECOVERY_UI_ANIMATION_FPS=$(TARGET_RECOVERY_UI_ANIMATION_FPS)
+else
+LOCAL_CFLAGS += -DRECOVERY_UI_ANIMATION_FPS=30
+endif
+
 ifneq ($(TARGET_RECOVERY_UI_VR_STEREO_OFFSET),)
 LOCAL_CFLAGS += -DRECOVERY_UI_VR_STEREO_OFFSET=$(TARGET_RECOVERY_UI_VR_STEREO_OFFSET)
 else
@@ -216,6 +227,16 @@ LOCAL_STATIC_LIBRARIES := \
 LOCAL_CFLAGS := -Werror
 include $(BUILD_STATIC_LIBRARY)
 
+# Wear default device
+# ===============================
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := wear_device.cpp
+
+# Should match TARGET_RECOVERY_UI_LIB in BoardConfig.mk.
+LOCAL_MODULE := librecovery_ui_wear
+
+include $(BUILD_STATIC_LIBRARY)
+
 # vr headset default device
 # ===============================
 include $(CLEAR_VARS)

screen_ui.cpp

@@ -53,6 +53,7 @@ static double now() {
 ScreenRecoveryUI::ScreenRecoveryUI()
     : kMarginWidth(RECOVERY_UI_MARGIN_WIDTH),
       kMarginHeight(RECOVERY_UI_MARGIN_HEIGHT),
+      kAnimationFps(RECOVERY_UI_ANIMATION_FPS),
       density_(static_cast<float>(android::base::GetIntProperty("ro.sf.lcd_density", 160)) / 160.f),
       currentIcon(NONE),
       progressBarType(EMPTY),
@@ -77,7 +78,6 @@ ScreenRecoveryUI::ScreenRecoveryUI()
       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) {}
@@ -375,7 +375,7 @@ void* ScreenRecoveryUI::ProgressThreadStartRoutine(void* data) {
 }
 
 void ScreenRecoveryUI::ProgressThreadLoop() {
-  double interval = 1.0 / animation_fps;
+  double interval = 1.0 / kAnimationFps;
   while (true) {
     double start = now();
     pthread_mutex_lock(&updateMutex);

screen_ui.h

@@ -84,6 +84,9 @@ class ScreenRecoveryUI : public RecoveryUI {
   const int kMarginWidth;
   const int kMarginHeight;
 
+  // Number of frames per sec (default: 30) for both parts of the animation.
+  const int kAnimationFps;
+
   // The scale factor from dp to pixels. 1.0 for mdpi, 4.0 for xxxhdpi.
   const float density_;
 
@@ -141,9 +144,6 @@ class ScreenRecoveryUI : public RecoveryUI {
   size_t current_frame;
   bool intro_done;
 
-  // Number of frames per sec (default: 30) for both parts of the animation.
-  int animation_fps;
-
   int stage, max_stage;
 
   int char_width_;

wear_device.cpp

@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2017 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"
+#include "wear_ui.h"
+
+Device* make_device() {
+  return new Device(new WearRecoveryUI);
+}
+