private boolean stepAnimation()

in com/android/server/wm/ScreenRotationAnimation.java [747:924]
156 lines of code
79 McCabe index (conditional complexity)

    private boolean stepAnimation(long now) {
        if (now > mHalfwayPoint) {
            mHalfwayPoint = Long.MAX_VALUE;
        }
        if (mFinishAnimReady && mFinishAnimStartTime < 0) {
            if (DEBUG_STATE) Slog.v(TAG, "Step: finish anim now ready");
            mFinishAnimStartTime = now;
        }

        if (TWO_PHASE_ANIMATION) {
            mMoreStartExit = false;
            if (mStartExitAnimation != null) {
                mMoreStartExit = mStartExitAnimation.getTransformation(now, mStartExitTransformation);
                if (DEBUG_TRANSFORMS) Slog.v(TAG, "Stepped start exit: " + mStartExitTransformation);
            }

            mMoreStartEnter = false;
            if (mStartEnterAnimation != null) {
                mMoreStartEnter = mStartEnterAnimation.getTransformation(now, mStartEnterTransformation);
                if (DEBUG_TRANSFORMS) Slog.v(TAG, "Stepped start enter: " + mStartEnterTransformation);
            }
        }
        if (USE_CUSTOM_BLACK_FRAME) {
            mMoreStartFrame = false;
            if (mStartFrameAnimation != null) {
                mMoreStartFrame = mStartFrameAnimation.getTransformation(now, mStartFrameTransformation);
                if (DEBUG_TRANSFORMS) Slog.v(TAG, "Stepped start frame: " + mStartFrameTransformation);
            }
        }

        long finishNow = mFinishAnimReady ? (now - mFinishAnimStartTime) : 0;
        if (DEBUG_STATE) Slog.v(TAG, "Step: finishNow=" + finishNow);

        if (TWO_PHASE_ANIMATION) {
            mMoreFinishExit = false;
            if (mFinishExitAnimation != null) {
                mMoreFinishExit = mFinishExitAnimation.getTransformation(finishNow, mFinishExitTransformation);
                if (DEBUG_TRANSFORMS) Slog.v(TAG, "Stepped finish exit: " + mFinishExitTransformation);
            }

            mMoreFinishEnter = false;
            if (mFinishEnterAnimation != null) {
                mMoreFinishEnter = mFinishEnterAnimation.getTransformation(finishNow, mFinishEnterTransformation);
                if (DEBUG_TRANSFORMS) Slog.v(TAG, "Stepped finish enter: " + mFinishEnterTransformation);
            }
        }
        if (USE_CUSTOM_BLACK_FRAME) {
            mMoreFinishFrame = false;
            if (mFinishFrameAnimation != null) {
                mMoreFinishFrame = mFinishFrameAnimation.getTransformation(finishNow, mFinishFrameTransformation);
                if (DEBUG_TRANSFORMS) Slog.v(TAG, "Stepped finish frame: " + mFinishFrameTransformation);
            }
        }

        mMoreRotateExit = false;
        if (mRotateExitAnimation != null) {
            mMoreRotateExit = mRotateExitAnimation.getTransformation(now, mRotateExitTransformation);
            if (DEBUG_TRANSFORMS) Slog.v(TAG, "Stepped rotate exit: " + mRotateExitTransformation);
        }

        mMoreRotateEnter = false;
        if (mRotateEnterAnimation != null) {
            mMoreRotateEnter = mRotateEnterAnimation.getTransformation(now, mRotateEnterTransformation);
            if (DEBUG_TRANSFORMS) Slog.v(TAG, "Stepped rotate enter: " + mRotateEnterTransformation);
        }

        if (USE_CUSTOM_BLACK_FRAME) {
            mMoreRotateFrame = false;
            if (mRotateFrameAnimation != null) {
                mMoreRotateFrame = mRotateFrameAnimation.getTransformation(now, mRotateFrameTransformation);
                if (DEBUG_TRANSFORMS) Slog.v(TAG, "Stepped rotate frame: " + mRotateFrameTransformation);
            }
        }

        if (!mMoreRotateExit && (!TWO_PHASE_ANIMATION || (!mMoreStartExit && !mMoreFinishExit))) {
            if (TWO_PHASE_ANIMATION) {
                if (mStartExitAnimation != null) {
                    if (DEBUG_STATE) Slog.v(TAG, "Exit animations done, clearing start exit anim!");
                    mStartExitAnimation.cancel();
                    mStartExitAnimation = null;
                    mStartExitTransformation.clear();
                }
                if (mFinishExitAnimation != null) {
                    if (DEBUG_STATE) Slog.v(TAG, "Exit animations done, clearing finish exit anim!");
                    mFinishExitAnimation.cancel();
                    mFinishExitAnimation = null;
                    mFinishExitTransformation.clear();
                }
            }
            if (mRotateExitAnimation != null) {
                if (DEBUG_STATE) Slog.v(TAG, "Exit animations done, clearing rotate exit anim!");
                mRotateExitAnimation.cancel();
                mRotateExitAnimation = null;
                mRotateExitTransformation.clear();
            }
        }

        if (!mMoreRotateEnter && (!TWO_PHASE_ANIMATION || (!mMoreStartEnter && !mMoreFinishEnter))) {
            if (TWO_PHASE_ANIMATION) {
                if (mStartEnterAnimation != null) {
                    if (DEBUG_STATE) Slog.v(TAG, "Enter animations done, clearing start enter anim!");
                    mStartEnterAnimation.cancel();
                    mStartEnterAnimation = null;
                    mStartEnterTransformation.clear();
                }
                if (mFinishEnterAnimation != null) {
                    if (DEBUG_STATE) Slog.v(TAG, "Enter animations done, clearing finish enter anim!");
                    mFinishEnterAnimation.cancel();
                    mFinishEnterAnimation = null;
                    mFinishEnterTransformation.clear();
                }
            }
            if (mRotateEnterAnimation != null) {
                if (DEBUG_STATE) Slog.v(TAG, "Enter animations done, clearing rotate enter anim!");
                mRotateEnterAnimation.cancel();
                mRotateEnterAnimation = null;
                mRotateEnterTransformation.clear();
            }
        }

        if (USE_CUSTOM_BLACK_FRAME && !mMoreStartFrame && !mMoreRotateFrame && !mMoreFinishFrame) {
            if (mStartFrameAnimation != null) {
                if (DEBUG_STATE) Slog.v(TAG, "Frame animations done, clearing start frame anim!");
                mStartFrameAnimation.cancel();
                mStartFrameAnimation = null;
                mStartFrameTransformation.clear();
            }
            if (mFinishFrameAnimation != null) {
                if (DEBUG_STATE) Slog.v(TAG, "Frame animations done, clearing finish frame anim!");
                mFinishFrameAnimation.cancel();
                mFinishFrameAnimation = null;
                mFinishFrameTransformation.clear();
            }
            if (mRotateFrameAnimation != null) {
                if (DEBUG_STATE) Slog.v(TAG, "Frame animations done, clearing rotate frame anim!");
                mRotateFrameAnimation.cancel();
                mRotateFrameAnimation = null;
                mRotateFrameTransformation.clear();
            }
        }

        mExitTransformation.set(mRotateExitTransformation);
        mEnterTransformation.set(mRotateEnterTransformation);
        if (TWO_PHASE_ANIMATION) {
            mExitTransformation.compose(mStartExitTransformation);
            mExitTransformation.compose(mFinishExitTransformation);

            mEnterTransformation.compose(mStartEnterTransformation);
            mEnterTransformation.compose(mFinishEnterTransformation);
        }

        if (DEBUG_TRANSFORMS) Slog.v(TAG, "Final exit: " + mExitTransformation);
        if (DEBUG_TRANSFORMS) Slog.v(TAG, "Final enter: " + mEnterTransformation);

        if (USE_CUSTOM_BLACK_FRAME) {
            //mFrameTransformation.set(mRotateExitTransformation);
            //mFrameTransformation.compose(mStartExitTransformation);
            //mFrameTransformation.compose(mFinishExitTransformation);
            mFrameTransformation.set(mRotateFrameTransformation);
            mFrameTransformation.compose(mStartFrameTransformation);
            mFrameTransformation.compose(mFinishFrameTransformation);
            mFrameTransformation.getMatrix().preConcat(mFrameInitialMatrix);
            if (DEBUG_TRANSFORMS) Slog.v(TAG, "Final frame: " + mFrameTransformation);
        }

        final boolean more = (TWO_PHASE_ANIMATION
                    && (mMoreStartEnter || mMoreStartExit || mMoreFinishEnter || mMoreFinishExit))
                || (USE_CUSTOM_BLACK_FRAME
                        && (mMoreStartFrame || mMoreRotateFrame || mMoreFinishFrame))
                || mMoreRotateEnter || mMoreRotateExit
                || !mFinishAnimReady;

        mSnapshotFinalMatrix.setConcat(mExitTransformation.getMatrix(), mSnapshotInitialMatrix);

        if (DEBUG_STATE) Slog.v(TAG, "Step: more=" + more);

        return more;
    }