annotate app/src/main/java/com/five_ten_sg/connectbot/TerminalView.java @ 526:9a8862b87f6e stable-1.9.4-8

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author Carl Byington <carl@five-ten-sg.com>
date Sat, 01 Jun 2024 10:27:22 -0600
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1 /*
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2 * ConnectBot: simple, powerful, open-source SSH client for Android
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3 * Copyright 2007 Kenny Root, Jeffrey Sharkey
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4 *
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5 * Licensed under the Apache License, Version 2.0 (the "License");
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6 * you may not use this file except in compliance with the License.
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7 * You may obtain a copy of the License at
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8 *
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9 * http://www.apache.org/licenses/LICENSE-2.0
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10 *
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11 * Unless required by applicable law or agreed to in writing, software
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12 * distributed under the License is distributed on an "AS IS" BASIS,
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13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 * See the License for the specific language governing permissions and
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15 * limitations under the License.
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16 */
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17
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18 package com.five_ten_sg.connectbot;
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19
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20 import java.util.List;
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21 import java.util.regex.Matcher;
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22 import java.util.regex.Pattern;
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23
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24 import com.five_ten_sg.connectbot.bean.SelectionArea;
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25 import com.five_ten_sg.connectbot.service.FontSizeChangedListener;
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26 import com.five_ten_sg.connectbot.service.TerminalBridge;
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27 import com.five_ten_sg.connectbot.service.TerminalKeyListener;
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28 import android.app.Activity;
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29 import android.content.ContentResolver;
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30 import android.content.Context;
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31 import android.content.Intent;
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32 import android.content.pm.ResolveInfo;
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33 import android.database.Cursor;
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34 import android.graphics.Canvas;
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35 import android.graphics.ColorMatrix;
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36 import android.graphics.ColorMatrixColorFilter;
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37 import android.graphics.Matrix;
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38 import android.graphics.Paint;
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39 import android.graphics.Path;
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40 import android.graphics.RectF;
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41 import android.net.Uri;
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42 import android.os.AsyncTask;
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43 import android.util.Log;
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44 import android.view.KeyEvent;
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45 import android.view.ScaleGestureDetector;
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46 import android.view.View;
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47 import android.view.ViewGroup.LayoutParams;
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48 import android.view.accessibility.AccessibilityEvent;
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49 import android.view.accessibility.AccessibilityManager;
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50 import android.view.inputmethod.BaseInputConnection;
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51 import android.view.inputmethod.EditorInfo;
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52 import android.view.inputmethod.InputConnection;
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53 import android.widget.Toast;
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54 import de.mud.terminal.VDUBuffer;
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55
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56 /**
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57 * User interface {@link View} for showing a TerminalBridge in an
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58 * {@link Activity}. Handles drawing bitmap updates and passing keystrokes down
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59 * to terminal.
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60 *
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61 * @author jsharkey
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62 */
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63 public class TerminalView extends View implements FontSizeChangedListener {
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64 public final static String TAG = "ConnectBot.TerminalView";
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65
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66 private final Context context;
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67 public final TerminalBridge bridge;
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68 private final Paint paint;
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69 private final Paint cursorPaint;
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70 private final Paint cursorStrokePaint;
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71
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72 // Cursor paints to distinguish modes
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73 private Path ctrlCursor, altCursor, shiftCursor;
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74 private RectF tempSrc, tempDst;
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75 private Matrix scaleMatrix;
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76 private static final Matrix.ScaleToFit scaleType = Matrix.ScaleToFit.FILL;
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77
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78 private Toast notification = null;
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79 private String lastNotification = null;
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80 private volatile boolean notifications = true;
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81
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82 // Related to Accessibility Features
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83 private boolean mAccessibilityInitialized = false;
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84 private boolean mAccessibilityActive = true;
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85 private Object[] mAccessibilityLock = new Object[0];
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86 private StringBuffer mAccessibilityBuffer;
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87 private Pattern mControlCodes = null;
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88 private Matcher mCodeMatcher = null;
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89 private AccessibilityEventSender mEventSender = null;
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90
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91
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92 private static final String BACKSPACE_CODE = "\\x08\\x1b\\[K";
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93 private static final String CONTROL_CODE_PATTERN = "\\x1b\\[K[^m]+[m|:]";
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94
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95 private static final int ACCESSIBILITY_EVENT_THRESHOLD = 1000;
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96 private static final String SCREENREADER_INTENT_ACTION = "android.accessibilityservice.AccessibilityService";
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97 private static final String SCREENREADER_INTENT_CATEGORY = "android.accessibilityservice.category.FEEDBACK_SPOKEN";
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98
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99 public ScaleGestureDetector mScaleDetector;
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100
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101 private ColorMatrix getColorMatrix() {
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102 return new ColorMatrix(new float[] {
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103 -1, 0, 0, 0, 255,
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104 0, -1, 0, 0, 255,
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105 0, 0, -1, 0, 255,
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106 0, 0, 0, 1, 0
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107 });
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108 }
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109
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110 public TerminalView(Context context, TerminalBridge bridge) {
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111 super(context);
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112 this.context = context;
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113 this.bridge = bridge;
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114 paint = new Paint();
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115 setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
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116 setFocusable(true);
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117 setFocusableInTouchMode(true);
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118 cursorPaint = new Paint();
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119 cursorPaint.setColor(bridge.color[bridge.defaultFg]);
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120 cursorPaint.setColorFilter(new ColorMatrixColorFilter(getColorMatrix()));
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121 //cursorPaint.setXfermode(new PixelXorXfermode(bridge.color[bridge.defaultBg]));
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122 cursorPaint.setAntiAlias(true);
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123 cursorStrokePaint = new Paint(cursorPaint);
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124 cursorStrokePaint.setStrokeWidth(0.1f);
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125 cursorStrokePaint.setStyle(Paint.Style.STROKE);
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126 /*
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127 * Set up our cursor indicators on a 1x1 Path object which we can later
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128 * transform to our character width and height
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129 */
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130 // TODO make this into a resource somehow
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131 shiftCursor = new Path();
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132 shiftCursor.lineTo(0.5f, 0.33f);
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133 shiftCursor.lineTo(1.0f, 0.0f);
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134 altCursor = new Path();
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135 altCursor.moveTo(0.0f, 1.0f);
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136 altCursor.lineTo(0.5f, 0.66f);
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137 altCursor.lineTo(1.0f, 1.0f);
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138 ctrlCursor = new Path();
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139 ctrlCursor.moveTo(0.0f, 0.25f);
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140 ctrlCursor.lineTo(1.0f, 0.5f);
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141 ctrlCursor.lineTo(0.0f, 0.75f);
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142 // For creating the transform when the terminal resizes
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143 tempSrc = new RectF();
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144 tempSrc.set(0.0f, 0.0f, 1.0f, 1.0f);
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145 tempDst = new RectF();
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146 scaleMatrix = new Matrix();
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147 bridge.addFontSizeChangedListener(this);
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148 // connect our view up to the bridge
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149 setOnKeyListener(bridge.getKeyHandler());
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150 mAccessibilityBuffer = new StringBuffer();
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151 // Enable accessibility features if a screen reader is active.
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152 new AccessibilityStateTester().execute((Void) null);
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153 mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
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154 }
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155
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156 public void destroy() {
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157 // tell bridge to destroy its bitmap
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158 bridge.parentDestroyed();
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159 }
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160
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parents:
diff changeset
161 @Override
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diff changeset
162 protected void onSizeChanged(int w, int h, int oldw, int oldh) {
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diff changeset
163 super.onSizeChanged(w, h, oldw, oldh);
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164 bridge.parentChanged(this);
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165 scaleCursors();
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166 }
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167
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168 public void onFontSizeChanged(float size) {
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diff changeset
169 scaleCursors();
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170 }
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171
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172 private void scaleCursors() {
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diff changeset
173 // Create a scale matrix to scale our 1x1 representation of the cursor
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174 tempDst.set(0.0f, 0.0f, bridge.charWidth, bridge.charHeight);
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175 scaleMatrix.setRectToRect(tempSrc, tempDst, scaleType);
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176 }
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177
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diff changeset
178 @Override
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diff changeset
179 public void onDraw(Canvas canvas) {
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180 if (bridge.bitmap != null) {
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parents:
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181 // draw the bitmap
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diff changeset
182 bridge.onDraw();
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diff changeset
183 // draw the bridge bitmap if it exists
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184 canvas.drawBitmap(bridge.bitmap, 0, 0, paint);
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185
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186 // also draw cursor if visible
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187 if (bridge.buffer.isCursorVisible()) {
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188 int cursorColumn = bridge.buffer.getCursorColumn();
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diff changeset
189 final int cursorRow = bridge.buffer.getCursorRow();
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diff changeset
190 final int columns = bridge.buffer.getColumns();
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191
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parents:
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192 if (cursorColumn == columns)
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diff changeset
193 cursorColumn = columns - 1;
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parents:
diff changeset
194
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diff changeset
195 if (cursorColumn < 0 || cursorRow < 0)
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196 return;
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197
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diff changeset
198 int currentAttribute = bridge.buffer.getAttributes(
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diff changeset
199 cursorColumn, cursorRow);
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200 boolean onWideCharacter = (currentAttribute & VDUBuffer.FULLWIDTH) != 0;
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diff changeset
201 int x = cursorColumn * bridge.charWidth;
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diff changeset
202 int y = (bridge.buffer.getCursorRow()
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diff changeset
203 + bridge.buffer.screenBase - bridge.buffer.windowBase)
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204 * bridge.charHeight;
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205 // Save the current clip and translation
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206 canvas.save();
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207 canvas.translate(x, y);
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diff changeset
208 canvas.clipRect(0, 0,
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209 bridge.charWidth * (onWideCharacter ? 2 : 1),
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diff changeset
210 bridge.charHeight);
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diff changeset
211 canvas.drawPaint(cursorPaint);
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212 final int deadKey = bridge.getKeyHandler().getDeadKey();
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213
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diff changeset
214 if (deadKey != 0) {
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diff changeset
215 canvas.drawText(new char[] { (char)deadKey }, 0, 1, 0, 0, cursorStrokePaint);
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216 }
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217
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218 // Make sure we scale our decorations to the correct size.
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diff changeset
219 canvas.concat(scaleMatrix);
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diff changeset
220 int metaState = bridge.getKeyHandler().getMetaState();
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diff changeset
221
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diff changeset
222 if ((metaState & TerminalKeyListener.META_SHIFT_ON) != 0)
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diff changeset
223 canvas.drawPath(shiftCursor, cursorStrokePaint);
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diff changeset
224 else if ((metaState & TerminalKeyListener.META_SHIFT_LOCK) != 0)
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diff changeset
225 canvas.drawPath(shiftCursor, cursorPaint);
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diff changeset
226
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parents:
diff changeset
227 if ((metaState & TerminalKeyListener.META_ALT_ON) != 0)
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diff changeset
228 canvas.drawPath(altCursor, cursorStrokePaint);
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diff changeset
229 else if ((metaState & TerminalKeyListener.META_ALT_LOCK) != 0)
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diff changeset
230 canvas.drawPath(altCursor, cursorPaint);
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diff changeset
231
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parents:
diff changeset
232 if ((metaState & TerminalKeyListener.META_CTRL_ON) != 0)
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diff changeset
233 canvas.drawPath(ctrlCursor, cursorStrokePaint);
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diff changeset
234 else if ((metaState & TerminalKeyListener.META_CTRL_LOCK) != 0)
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diff changeset
235 canvas.drawPath(ctrlCursor, cursorPaint);
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parents:
diff changeset
236
457
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parents: 438
diff changeset
237 canvas.restore(); // Restore previous clip region
0
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parents:
diff changeset
238 }
0ce5cc452d02 initial version
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parents:
diff changeset
239
0ce5cc452d02 initial version
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diff changeset
240 // draw any highlighted area
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
241 if (bridge.isSelectingForCopy()) {
0ce5cc452d02 initial version
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parents:
diff changeset
242 SelectionArea area = bridge.getSelectionArea();
457
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parents: 438
diff changeset
243 canvas.save();
0
0ce5cc452d02 initial version
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parents:
diff changeset
244 canvas.clipRect(
0ce5cc452d02 initial version
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parents:
diff changeset
245 area.getLeft() * bridge.charWidth,
0ce5cc452d02 initial version
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parents:
diff changeset
246 area.getTop() * bridge.charHeight,
0ce5cc452d02 initial version
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parents:
diff changeset
247 (area.getRight() + 1) * bridge.charWidth,
0ce5cc452d02 initial version
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parents:
diff changeset
248 (area.getBottom() + 1) * bridge.charHeight
0ce5cc452d02 initial version
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parents:
diff changeset
249 );
0ce5cc452d02 initial version
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diff changeset
250 canvas.drawPaint(cursorPaint);
0ce5cc452d02 initial version
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parents:
diff changeset
251 canvas.restore();
0ce5cc452d02 initial version
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parents:
diff changeset
252 }
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253 }
0ce5cc452d02 initial version
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diff changeset
254 }
0ce5cc452d02 initial version
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diff changeset
255
0ce5cc452d02 initial version
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diff changeset
256 public void notifyUser(String message) {
419
9045b1af94e5 revert notifyUser() changes
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parents: 417
diff changeset
257 try {
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
258 // ignore if don't want notifications
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
259 if (!notifications) return;
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
260 // Don't keep telling the user the same thing.
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
261 if (lastNotification != null && lastNotification.equals(message)) return;
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
262 // create or use old toast
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
263 if (notification == null) {
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
264 notification = Toast.makeText(context, message, Toast.LENGTH_SHORT);
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
265 }
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
266 else {
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
267 notification.setText(message);
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
268 }
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
269 notification.show();
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
270 lastNotification = message;
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Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
271 }
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
272 catch (Exception e) {
9045b1af94e5 revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
273 Log.e(TAG, "Problem while trying to notify user", e);
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Carl Byington <carl@five-ten-sg.com>
parents: 417
diff changeset
274 }
0
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
275 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
276
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
277 /**
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
278 * Ask the {@link TerminalBridge} we're connected to to resize to a specific size.
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
279 * @param width
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
280 * @param height
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
281 */
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
282 public void forceSize(int width, int height) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
283 bridge.resizeComputed(width, height, getWidth(), getHeight());
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
284 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
285
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
286 /**
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
287 * Sets the ability for the TerminalView to display Toast notifications to the user.
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
288 * @param value whether to enable notifications or not
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
289 */
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
290 public void setNotifications(boolean value) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
291 notifications = value;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
292 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
293
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
294 @Override
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
295 public boolean onCheckIsTextEditor() {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
296 return true;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
297 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
298
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
299 @Override
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
300 public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
301 outAttrs.imeOptions |=
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
302 EditorInfo.IME_FLAG_NO_EXTRACT_UI |
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
303 EditorInfo.IME_FLAG_NO_ENTER_ACTION |
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
304 EditorInfo.IME_ACTION_NONE;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
305 outAttrs.inputType = EditorInfo.TYPE_NULL;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
306 return new BaseInputConnection(this, false) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
307 @Override
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
308 public boolean deleteSurroundingText(int leftLength, int rightLength) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
309 if (rightLength == 0 && leftLength == 0) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
310 return this.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL));
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
311 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
312
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
313 for (int i = 0; i < leftLength; i++) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
314 this.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL));
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
315 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
316
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
317 // TODO: forward delete
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
318 return true;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
319 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
320 };
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
321 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
322
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
323 public void propagateConsoleText(char[] rawText, int length) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
324 if (mAccessibilityActive) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
325 synchronized (mAccessibilityLock) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
326 mAccessibilityBuffer.append(rawText, 0, length);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
327 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
328
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
329 if (mAccessibilityInitialized) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
330 if (mEventSender != null) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
331 removeCallbacks(mEventSender);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
332 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
333 else {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
334 mEventSender = new AccessibilityEventSender();
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
335 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
336
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
337 postDelayed(mEventSender, ACCESSIBILITY_EVENT_THRESHOLD);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
338 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
339 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
340 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
341
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
342 private class AccessibilityEventSender implements Runnable {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
343 public void run() {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
344 synchronized (mAccessibilityLock) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
345 if (mCodeMatcher == null) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
346 mCodeMatcher = mControlCodes.matcher(mAccessibilityBuffer);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
347 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
348 else {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
349 mCodeMatcher.reset(mAccessibilityBuffer);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
350 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
351
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
352 // Strip all control codes out.
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
353 mAccessibilityBuffer = new StringBuffer(mCodeMatcher.replaceAll(" "));
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
354 // Apply Backspaces using backspace character sequence
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
355 int i = mAccessibilityBuffer.indexOf(BACKSPACE_CODE);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
356
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
357 while (i != -1) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
358 mAccessibilityBuffer = mAccessibilityBuffer.replace(i == 0 ? 0 : i - 1, i
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
359 + BACKSPACE_CODE.length(), "");
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
360 i = mAccessibilityBuffer.indexOf(BACKSPACE_CODE);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
361 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
362
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
363 if (mAccessibilityBuffer.length() > 0) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
364 AccessibilityEvent event = AccessibilityEvent.obtain(
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
365 AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
366 event.setFromIndex(0);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
367 event.setAddedCount(mAccessibilityBuffer.length());
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
368 event.getText().add(mAccessibilityBuffer);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
369 sendAccessibilityEventUnchecked(event);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
370 mAccessibilityBuffer.setLength(0);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
371 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
372 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
373 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
374 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
375
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
376 private class AccessibilityStateTester extends AsyncTask<Void, Void, Boolean> {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
377 @Override
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
378 protected Boolean doInBackground(Void... params) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
379 /*
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
380 * Presumably if the accessibility manager is not enabled, we don't
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
381 * need to send accessibility events.
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
382 */
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
383 final AccessibilityManager accessibility = (AccessibilityManager) context
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
384 .getSystemService(Context.ACCESSIBILITY_SERVICE);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
385
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
386 if (!accessibility.isEnabled()) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
387 return false;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
388 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
389
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
390 /*
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
391 * Restrict the set of intents to only accessibility services that
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
392 * have the category FEEDBACK_SPOKEN (aka, screen readers).
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
393 */
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
394 final Intent screenReaderIntent = new Intent(SCREENREADER_INTENT_ACTION);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
395 screenReaderIntent.addCategory(SCREENREADER_INTENT_CATEGORY);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
396 final ContentResolver cr = context.getContentResolver();
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
397 final List<ResolveInfo> screenReaders = context.getPackageManager().queryIntentServices(
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
398 screenReaderIntent, 0);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
399 boolean foundScreenReader = false;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
400 final int N = screenReaders.size();
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
401
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
402 for (int i = 0; i < N; i++) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
403 final ResolveInfo screenReader = screenReaders.get(i);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
404 /*
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
405 * All screen readers are expected to implement a content
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
406 * provider that responds to:
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
407 * content://<nameofpackage>.providers.StatusProvider
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
408 */
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
409 final Cursor cursor = cr.query(
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
410 Uri.parse("content://" + screenReader.serviceInfo.packageName
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
411 + ".providers.StatusProvider"), null, null, null, null);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
412
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
413 if (cursor != null && cursor.moveToFirst()) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
414 /*
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
415 * These content providers use a special cursor that only has
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
416 * one element, an integer that is 1 if the screen reader is
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
417 * running.
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
418 */
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
419 final int status = cursor.getInt(0);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
420 cursor.close();
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
421
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
422 if (status == 1) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
423 foundScreenReader = true;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
424 break;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
425 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
426 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
427 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
428
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
429 if (foundScreenReader) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
430 mControlCodes = Pattern.compile(CONTROL_CODE_PATTERN);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
431 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
432
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
433 return foundScreenReader;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
434 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
435
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
436 @Override
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
437 protected void onPostExecute(Boolean result) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
438 mAccessibilityActive = result;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
439 mAccessibilityInitialized = true;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
440
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
441 if (result) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
442 mEventSender = new AccessibilityEventSender();
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
443 postDelayed(mEventSender, ACCESSIBILITY_EVENT_THRESHOLD);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
444 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
445 else {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
446 mAccessibilityBuffer = null;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
447 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
448 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
449 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
450
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
451 private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
452 @Override
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
453 public boolean onScale(ScaleGestureDetector detector) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
454 float mScaleFactor = detector.getScaleFactor();
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
455
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
456 if (mScaleFactor > 1.1) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
457 bridge.increaseFontSize();
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
458 return true;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
459 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
460 else if (mScaleFactor < 0.9) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
461 bridge.decreaseFontSize();
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
462 return true;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
463 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
464
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
465 return (false);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
466 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
467 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
468
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
469 }