Pointericon

[PointerIcon]

이번편은 PointerIcon을 어떻게 변경시키는지 동작에 대해 알아보려 한다. 연관 파일

1. PointerController.cpp
2. MouseCursorController.cpp
3. com_android_server_input_InputManagerService.cpp
4. InputManagerService.java

Icon Resource들을 load하는 부분.

loadPointerIcon loadPointerResources loadAdditionalMouseResources

먼저 PointerIcon을 사용하기 위해 view에서 Resocure들을 native로 가져오는 선행작업들.

앱단에서 PointerIcon 변경 위해 호출하면서 시작 setPointerIconType(int iconId).

1.InputManager.java

    public void setPointerIconType(int iconId) {
        try {
            mIm.setPointerIconType(iconId);
        } catch (RemoteException ex) {
            throw ex.rethrowFromSystemServer();
        }
    }

2. InputManagerService.java

    // Binder call
    @Override
    public void setPointerIconType(int iconId) {
        nativeSetPointerIconType(mPtr, iconId);
    }

3. com_android_server_input_InputManagerService.cpp (setPointerIconType)

void NativeInputManager::setPointerIconType(int32_t iconId) {
    AutoMutex _l(mLock);
    std::shared_ptr<PointerController> controller = mLocked.pointerController.lock();
    if (controller != nullptr) {
        controller->updatePointerIcon(iconId);
    }
}

4. PointerController.cpp (updatePointerIcon)

void PointerController::updatePointerIcon(int32_t iconId) {
    std::scoped_lock lock(mLock);
    mCursorController.updatePointerIcon(iconId);
}

5. MouseCursorController.cpp (updatePointerIcon)

void MouseCursorController::updatePointerIcon(int32_t iconId) {
    std::scoped_lock lock(mLock);
	// iconId가 변경되었으면 update
    if (mLocked.requestedPointerType != iconId) {
        mLocked.requestedPointerType = iconId;
        mLocked.updatePointerIcon = true;
        updatePointerLocked();
    }
}

6. MouseCursorController.cpp (updatePointerLocked)

void MouseCursorController::updatePointerLocked() REQUIRES(mLock) {
    if (!mLocked.viewport.isValid()) {
        return;
    }
    sp<SpriteController> spriteController = mContext.getSpriteController();
    spriteController->openTransaction();

    mLocked.pointerSprite->setLayer(Sprite::BASE_LAYER_POINTER);
    mLocked.pointerSprite->setPosition(mLocked.pointerX, mLocked.pointerY);
    mLocked.pointerSprite->setDisplayId(mLocked.viewport.displayId);

    if (mLocked.pointerAlpha > 0) {
        mLocked.pointerSprite->setAlpha(mLocked.pointerAlpha);
        mLocked.pointerSprite->setVisible(true);
    } else {
        mLocked.pointerSprite->setVisible(false);
    }

// updatePointerIcon을 true인 상태로 와야 변경이 됨.
/*
mLocked.updatePointerIcon = true 시켜주는 부분.
1. updatePointerIcon(int32_t iconId)
2. setCustomPointerIcon(const SpriteIcon& icon)
3. loadResourcesLocked(bool getAdditionalMouseResources)
4. getAdditionalMouseResources
*/

    // additionalMouseResources는 IMS_JNI보면 처음에 모든 리소스를 다 로드해놓음.
    // 요청값이 기본값이라면 mLocked.pointerIcon로 바로 set해주고 아니라면 리소스에서 찾아서 셋해줌.
    if (mLocked.updatePointerIcon) {
        if (mLocked.requestedPointerType == mContext.getPolicy()->getDefaultPointerIconId()) {
            mLocked.pointerSprite->setIcon(mLocked.pointerIcon);
        } else {
            std::map<int32_t, SpriteIcon>::const_iterator iter =
                    mLocked.additionalMouseResources.find(mLocked.requestedPointerType);
            if (iter != mLocked.additionalMouseResources.end()) {
                std::map<int32_t, PointerAnimation>::const_iterator anim_iter =
                        mLocked.animationResources.find(mLocked.requestedPointerType);
                if (anim_iter != mLocked.animationResources.end()) {
                    mLocked.animationFrameIndex = 0;
                    mLocked.lastFrameUpdatedTime = systemTime(SYSTEM_TIME_MONOTONIC);
                    startAnimationLocked();
                }
                mLocked.pointerSprite->setIcon(iter->second);
            } else {
                ALOGW("Can't find the resource for icon id %d", mLocked.requestedPointerType);
                mLocked.pointerSprite->setIcon(mLocked.pointerIcon);
            }
        }
        mLocked.updatePointerIcon = false;
    }

    spriteController->closeTransaction();
}