More refactoring for Viewer

tools/viewer/android/Window_android.cpp

-/*
-* Copyright 2016 Google Inc.
-*
-* Use of this source code is governed by a BSD-style license that can be
-* found in the LICENSE file.
-*/
-
-#include "Window_android.h"
-
-#include "VulkanTestContext_android.h"
-
-namespace sk_app {
-
-Window* Window::CreateNativeWindow(void* platformData) {
-    Window_android* window = new Window_android();
-    if (!window->init((android_app*)platformData)) {
-        delete window;
-        return nullptr;
-    }
-    return window;
-}
-
-static void handle_cmd(struct android_app* app, int32_t cmd);
-static int32_t handle_input(struct android_app* app, AInputEvent* event);
-
-bool Window_android::init(android_app* app) {
-    SkASSERT(app);
-    mApp = app;
-    mApp->userData = this;
-    mApp->onAppCmd = handle_cmd;
-    mApp->onInputEvent = handle_input;
-    return true;
-}
-
-void Window_android::setTitle(const char* title) {
-    //todo
-    SkDebugf("Title: %s", title);
-}
-
-bool Window_android::attach(BackEndType attachType, int msaaSampleCount) {
-    if (kVulkan_BackendType != attachType) {
-        return false;
-    }
-
-    mSampleCount = msaaSampleCount;
-
-    // We delay the creation of fTestContext until Android informs us that
-    // the native window is ready to use.
-    return true;
-}
-
-void Window_android::initDisplay(ANativeWindow* window) {
-    SkASSERT(window);
-    ContextPlatformData_android platformData;
-    platformData.fNativeWindow = window;
-    fTestContext = VulkanTestContext::Create((void*)&platformData, mSampleCount);
-}
-
-static void android_app_write_cmd(struct android_app* android_app, int8_t cmd) {
-    if (write(android_app->msgwrite, &cmd, sizeof(cmd)) != sizeof(cmd)) {
-        SkDebugf("Failure writing android_app cmd: %s\n", strerror(errno));
-    }
-}
-
-void Window_android::inval() {
-    android_app_write_cmd(mApp, APP_CMD_INVAL_WINDOW);
-}
-
-void Window_android::paintIfNeeded() {
-    if (mApp->window || !mContentRect.isEmpty()) {
-        this->onPaint();
-    }
-}
-
-/**
- * Process the next main command.
- */
-static void handle_cmd(struct android_app* app, int32_t cmd) {
-    Window_android* window = (Window_android*)app->userData;
-    switch (cmd) {
-        case APP_CMD_INIT_WINDOW:
-            // The window is being shown, get it ready.
-            SkASSERT(app->window);
-            window->initDisplay(app->window);
-            window->paintIfNeeded();
-            break;
-        case APP_CMD_WINDOW_RESIZED: {
-            int width = ANativeWindow_getWidth(app->window);
-            int height = ANativeWindow_getHeight(app->window);
-            window->onResize(width, height);
-            break;
-        }
-        case APP_CMD_CONTENT_RECT_CHANGED:
-            window->setContentRect(app->contentRect.left, app->contentRect.top,
-                                   app->contentRect.right, app->contentRect.bottom);
-            window->paintIfNeeded();
-            break;
-        case APP_CMD_TERM_WINDOW:
-            // The window is being hidden or closed, clean it up.
-            window->detach();
-            break;
-        case APP_CMD_INVAL_WINDOW:
-            window->paintIfNeeded();
-            break;
-    }
-}
-
-static Window::Key get_key(int32_t keycode) {
-    static const struct {
-        int32_t     fAndroidKey;
-        Window::Key fWindowKey;
-    } gPair[] = {
-        { AKEYCODE_BACK, Window::kBack_Key },
-        { AKEYCODE_VOLUME_UP, Window::kLeft_Key },
-        { AKEYCODE_VOLUME_DOWN, Window::kRight_Key }
-    };
-    for (size_t i = 0; i < SK_ARRAY_COUNT(gPair); i++) {
-        if (gPair[i].fAndroidKey == keycode) {
-            return gPair[i].fWindowKey;
-        }
-    }
-    return Window::kNONE_Key;
-}
-
-static Window::InputState get_action(int32_t action) {
-    static const struct {
-        int32_t            fAndroidAction;
-        Window::InputState fInputState;
-    } gPair[] = {
-        { AKEY_STATE_DOWN, Window::kDown_InputState },
-        { AKEY_STATE_UP, Window::kUp_InputState },
-    };
-    for (size_t i = 0; i < SK_ARRAY_COUNT(gPair); i++) {
-        if (gPair[i].fAndroidAction == action) {
-            return gPair[i].fInputState;
-        }
-    }
-    return Window::kMove_InputState;
-}
-
-static int32_t get_key_modifiers(AInputEvent* event) {
-    static const struct {
-        int32_t fAndroidState;
-        int32_t fWindowModifier;
-    } gPair[] = {
-        { AMETA_SHIFT_ON, Window::kShift_ModifierKey },
-        { AMETA_CTRL_ON, Window::kControl_ModifierKey },
-    };
-
-    int32_t metaState = AKeyEvent_getMetaState(event);
-    int32_t modifiers = 0;
-
-    if (AKeyEvent_getRepeatCount(event) == 0) {
-        modifiers |= Window::kFirstPress_ModifierKey;
-    }
-
-    for (size_t i = 0; i < SK_ARRAY_COUNT(gPair); i++) {
-        if (gPair[i].fAndroidState == metaState) {
-            modifiers |= gPair[i].fWindowModifier;
-        }
-    }
-    return modifiers;
-}
-
-/**
- * Process the next input event.
- */
-static int32_t handle_input(struct android_app* app, AInputEvent* event) {
-    Window_android* window = (Window_android*)app->userData;
-    switch(AInputEvent_getType(event)) {
-        case AINPUT_EVENT_TYPE_MOTION:
-            break;
-        case AINPUT_EVENT_TYPE_KEY:
-            Window::Key key = get_key(AKeyEvent_getKeyCode(event));
-            Window::InputState state = get_action(AKeyEvent_getAction(event));
-            int32_t mod = get_key_modifiers(event);
-            window->onKey(key, state, mod);
-            return true; // eat all key events
-    }
-    return 0;
-}
-
-}   // namespace sk_app