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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.terminal;
     18 
     19 import static com.android.terminal.Terminal.TAG;
     20 
     21 import android.content.Context;
     22 import android.graphics.Canvas;
     23 import android.graphics.Color;
     24 import android.util.Log;
     25 import android.view.View;
     26 
     27 import com.android.terminal.TerminalView.TerminalMetrics;
     28 
     29 /**
     30  * Rendered contents of a single line of a {@link Terminal} session.
     31  */
     32 public class TerminalLineView extends View {
     33     public int pos;
     34     public int row;
     35     public int cols;
     36 
     37     private final Terminal mTerm;
     38     private final TerminalMetrics mMetrics;
     39 
     40     public TerminalLineView(Context context, Terminal term, TerminalMetrics metrics) {
     41         super(context);
     42         mTerm = term;
     43         mMetrics = metrics;
     44     }
     45 
     46     @Override
     47     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
     48         setMeasuredDimension(getDefaultSize(0, widthMeasureSpec),
     49                 getDefaultSize(mMetrics.charHeight, heightMeasureSpec));
     50     }
     51 
     52     @Override
     53     protected void onDraw(Canvas canvas) {
     54         super.onDraw(canvas);
     55 
     56         if (mTerm == null) {
     57             Log.w(TAG, "onDraw() without a terminal");
     58             canvas.drawColor(Color.MAGENTA);
     59             return;
     60         }
     61 
     62         final TerminalMetrics m = mMetrics;
     63 
     64         for (int col = 0; col < cols;) {
     65             mTerm.getCellRun(row, col, m.run);
     66 
     67             m.bgPaint.setColor(m.run.bg);
     68             m.textPaint.setColor(m.run.fg);
     69 
     70             final int x = col * m.charWidth;
     71             final int xEnd = x + (m.run.colSize * m.charWidth);
     72 
     73             canvas.save();
     74             canvas.translate(x, 0);
     75             canvas.clipRect(0, 0, m.run.colSize * m.charWidth, m.charHeight);
     76 
     77             canvas.drawPaint(m.bgPaint);
     78             canvas.drawPosText(m.run.data, 0, m.run.dataSize, m.pos, m.textPaint);
     79 
     80             canvas.restore();
     81 
     82             col += m.run.colSize;
     83         }
     84 
     85         if (mTerm.getCursorVisible() && mTerm.getCursorRow() == row) {
     86             canvas.save();
     87             canvas.translate(mTerm.getCursorCol() * m.charWidth, 0);
     88             canvas.drawRect(0, 0, m.charWidth, m.charHeight, m.cursorPaint);
     89             canvas.restore();
     90         }
     91 
     92     }
     93 }
     94