Merge "Hide the collapse/expand icon if text fits the screen" into mnc-dev

import android.view.Display;

import android.view.View;

import android.view.ViewGroup;

import android.view.ViewTreeObserver;

import android.view.WindowManager;

import android.widget.AppSecurityPermissions;

import android.widget.Button;

        mAddMsg = (TextView)findViewById(R.id.add_msg);

        mAddMsgExpander = (ImageView) findViewById(R.id.add_msg_expander);

        mAddMsg.setOnClickListener(new View.OnClickListener() {

        final View.OnClickListener onClickListener = new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                toggleMessageEllipsis(v);

                toggleMessageEllipsis(mAddMsg);

            }

        };

        mAddMsgExpander.setOnClickListener(onClickListener);

        mAddMsg.setOnClickListener(onClickListener);

        // Determine whether the message can be collapsed - getLineCount() gives the correct

        // number of lines only after a layout pass.

        mAddMsg.getViewTreeObserver().addOnGlobalLayoutListener(

                new ViewTreeObserver.OnGlobalLayoutListener() {

                    @Override

                    public void onGlobalLayout() {

                        final int maxLines = getEllipsizedLines();

                        // hide the icon if number of visible lines does not exceed maxLines

                        boolean hideMsgExpander = mAddMsg.getLineCount() <= maxLines;

                        mAddMsgExpander.setVisibility(hideMsgExpander ? View.GONE : View.VISIBLE);

                        if (hideMsgExpander) {

                            mAddMsg.setOnClickListener(null);

                            ((View)mAddMsgExpander.getParent()).invalidate();

                        }

                        mAddMsg.getViewTreeObserver().removeOnGlobalLayoutListener(this);

                    }

                });