Mercurial > 510Connectbot
annotate app/src/main/java/com/five_ten_sg/connectbot/TerminalView.java @ 518:9acc51a5a98f
Added tag stable-1.9.4-6 for changeset 947ea334735d
| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Fri, 31 May 2024 13:35:44 -0600 |
| parents | 105815cce146 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * ConnectBot: simple, powerful, open-source SSH client for Android | |
| 3 * Copyright 2007 Kenny Root, Jeffrey Sharkey | |
| 4 * | |
| 5 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 * you may not use this file except in compliance with the License. | |
| 7 * You may obtain a copy of the License at | |
| 8 * | |
| 9 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 * | |
| 11 * Unless required by applicable law or agreed to in writing, software | |
| 12 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 * See the License for the specific language governing permissions and | |
| 15 * limitations under the License. | |
| 16 */ | |
| 17 | |
| 18 package com.five_ten_sg.connectbot; | |
| 19 | |
| 20 import java.util.List; | |
| 21 import java.util.regex.Matcher; | |
| 22 import java.util.regex.Pattern; | |
| 23 | |
| 24 import com.five_ten_sg.connectbot.bean.SelectionArea; | |
| 25 import com.five_ten_sg.connectbot.service.FontSizeChangedListener; | |
| 26 import com.five_ten_sg.connectbot.service.TerminalBridge; | |
| 27 import com.five_ten_sg.connectbot.service.TerminalKeyListener; | |
| 28 import android.app.Activity; | |
| 29 import android.content.ContentResolver; | |
| 30 import android.content.Context; | |
| 31 import android.content.Intent; | |
| 32 import android.content.pm.ResolveInfo; | |
| 33 import android.database.Cursor; | |
| 34 import android.graphics.Canvas; | |
|
457
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
35 import android.graphics.ColorMatrix; |
|
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
36 import android.graphics.ColorMatrixColorFilter; |
| 0 | 37 import android.graphics.Matrix; |
| 38 import android.graphics.Paint; | |
| 39 import android.graphics.Path; | |
| 40 import android.graphics.RectF; | |
| 41 import android.net.Uri; | |
| 42 import android.os.AsyncTask; | |
|
420
e5f7c2584296
revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents:
419
diff
changeset
|
43 import android.util.Log; |
| 0 | 44 import android.view.KeyEvent; |
|
457
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
45 import android.view.ScaleGestureDetector; |
| 0 | 46 import android.view.View; |
| 47 import android.view.ViewGroup.LayoutParams; | |
| 48 import android.view.accessibility.AccessibilityEvent; | |
| 49 import android.view.accessibility.AccessibilityManager; | |
| 50 import android.view.inputmethod.BaseInputConnection; | |
| 51 import android.view.inputmethod.EditorInfo; | |
| 52 import android.view.inputmethod.InputConnection; | |
| 53 import android.widget.Toast; | |
| 54 import de.mud.terminal.VDUBuffer; | |
| 55 | |
| 56 /** | |
| 57 * User interface {@link View} for showing a TerminalBridge in an | |
| 58 * {@link Activity}. Handles drawing bitmap updates and passing keystrokes down | |
| 59 * to terminal. | |
| 60 * | |
| 61 * @author jsharkey | |
| 62 */ | |
| 63 public class TerminalView extends View implements FontSizeChangedListener { | |
|
420
e5f7c2584296
revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents:
419
diff
changeset
|
64 public final static String TAG = "ConnectBot.TerminalView"; |
| 0 | 65 |
| 66 private final Context context; | |
|
91
33eb63352be5
remove 5250 configuration
Carl Byington <carl@five-ten-sg.com>
parents:
23
diff
changeset
|
67 public final TerminalBridge bridge; |
| 0 | 68 private final Paint paint; |
| 69 private final Paint cursorPaint; | |
| 70 private final Paint cursorStrokePaint; | |
| 71 | |
| 72 // Cursor paints to distinguish modes | |
| 73 private Path ctrlCursor, altCursor, shiftCursor; | |
| 74 private RectF tempSrc, tempDst; | |
| 75 private Matrix scaleMatrix; | |
| 76 private static final Matrix.ScaleToFit scaleType = Matrix.ScaleToFit.FILL; | |
| 77 | |
|
419
9045b1af94e5
revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents:
417
diff
changeset
|
78 private Toast notification = null; |
| 0 | 79 private String lastNotification = null; |
| 80 private volatile boolean notifications = true; | |
| 81 | |
| 82 // Related to Accessibility Features | |
| 83 private boolean mAccessibilityInitialized = false; | |
| 84 private boolean mAccessibilityActive = true; | |
| 85 private Object[] mAccessibilityLock = new Object[0]; | |
| 86 private StringBuffer mAccessibilityBuffer; | |
| 87 private Pattern mControlCodes = null; | |
| 88 private Matcher mCodeMatcher = null; | |
| 89 private AccessibilityEventSender mEventSender = null; | |
| 90 | |
| 23 | 91 |
| 0 | 92 private static final String BACKSPACE_CODE = "\\x08\\x1b\\[K"; |
| 93 private static final String CONTROL_CODE_PATTERN = "\\x1b\\[K[^m]+[m|:]"; | |
| 94 | |
| 95 private static final int ACCESSIBILITY_EVENT_THRESHOLD = 1000; | |
| 96 private static final String SCREENREADER_INTENT_ACTION = "android.accessibilityservice.AccessibilityService"; | |
| 97 private static final String SCREENREADER_INTENT_CATEGORY = "android.accessibilityservice.category.FEEDBACK_SPOKEN"; | |
| 98 | |
| 99 public ScaleGestureDetector mScaleDetector; | |
| 100 | |
|
457
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
101 private ColorMatrix getColorMatrix() { |
|
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
102 return new ColorMatrix(new float[] { |
|
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
103 -1, 0, 0, 0, 255, |
|
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
104 0, -1, 0, 0, 255, |
|
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
105 0, 0, -1, 0, 255, |
|
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
106 0, 0, 0, 1, 0 |
|
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
107 }); |
|
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
108 } |
|
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
109 |
| 0 | 110 public TerminalView(Context context, TerminalBridge bridge) { |
| 111 super(context); | |
|
91
33eb63352be5
remove 5250 configuration
Carl Byington <carl@five-ten-sg.com>
parents:
23
diff
changeset
|
112 this.context = context; |
|
33eb63352be5
remove 5250 configuration
Carl Byington <carl@five-ten-sg.com>
parents:
23
diff
changeset
|
113 this.bridge = bridge; |
| 0 | 114 paint = new Paint(); |
| 115 setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); | |
| 116 setFocusable(true); | |
| 117 setFocusableInTouchMode(true); | |
| 118 cursorPaint = new Paint(); | |
| 119 cursorPaint.setColor(bridge.color[bridge.defaultFg]); | |
|
457
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
120 cursorPaint.setColorFilter(new ColorMatrixColorFilter(getColorMatrix())); |
|
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
121 //cursorPaint.setXfermode(new PixelXorXfermode(bridge.color[bridge.defaultBg])); |
| 0 | 122 cursorPaint.setAntiAlias(true); |
| 123 cursorStrokePaint = new Paint(cursorPaint); | |
| 124 cursorStrokePaint.setStrokeWidth(0.1f); | |
| 125 cursorStrokePaint.setStyle(Paint.Style.STROKE); | |
| 126 /* | |
| 127 * Set up our cursor indicators on a 1x1 Path object which we can later | |
| 128 * transform to our character width and height | |
| 129 */ | |
| 130 // TODO make this into a resource somehow | |
| 131 shiftCursor = new Path(); | |
| 132 shiftCursor.lineTo(0.5f, 0.33f); | |
| 133 shiftCursor.lineTo(1.0f, 0.0f); | |
| 134 altCursor = new Path(); | |
| 135 altCursor.moveTo(0.0f, 1.0f); | |
| 136 altCursor.lineTo(0.5f, 0.66f); | |
| 137 altCursor.lineTo(1.0f, 1.0f); | |
| 138 ctrlCursor = new Path(); | |
| 139 ctrlCursor.moveTo(0.0f, 0.25f); | |
| 140 ctrlCursor.lineTo(1.0f, 0.5f); | |
| 141 ctrlCursor.lineTo(0.0f, 0.75f); | |
| 142 // For creating the transform when the terminal resizes | |
| 143 tempSrc = new RectF(); | |
| 144 tempSrc.set(0.0f, 0.0f, 1.0f, 1.0f); | |
| 145 tempDst = new RectF(); | |
| 146 scaleMatrix = new Matrix(); | |
| 147 bridge.addFontSizeChangedListener(this); | |
| 148 // connect our view up to the bridge | |
| 149 setOnKeyListener(bridge.getKeyHandler()); | |
| 150 mAccessibilityBuffer = new StringBuffer(); | |
| 151 // Enable accessibility features if a screen reader is active. | |
| 152 new AccessibilityStateTester().execute((Void) null); | |
| 153 mScaleDetector = new ScaleGestureDetector(context, new ScaleListener()); | |
| 154 } | |
| 155 | |
| 156 public void destroy() { | |
| 157 // tell bridge to destroy its bitmap | |
| 158 bridge.parentDestroyed(); | |
| 159 } | |
| 160 | |
| 161 @Override | |
| 162 protected void onSizeChanged(int w, int h, int oldw, int oldh) { | |
| 163 super.onSizeChanged(w, h, oldw, oldh); | |
| 164 bridge.parentChanged(this); | |
| 165 scaleCursors(); | |
| 166 } | |
| 167 | |
| 168 public void onFontSizeChanged(float size) { | |
| 169 scaleCursors(); | |
| 170 } | |
| 171 | |
| 172 private void scaleCursors() { | |
| 173 // Create a scale matrix to scale our 1x1 representation of the cursor | |
| 174 tempDst.set(0.0f, 0.0f, bridge.charWidth, bridge.charHeight); | |
| 175 scaleMatrix.setRectToRect(tempSrc, tempDst, scaleType); | |
| 176 } | |
| 177 | |
| 178 @Override | |
| 179 public void onDraw(Canvas canvas) { | |
| 180 if (bridge.bitmap != null) { | |
| 181 // draw the bitmap | |
| 182 bridge.onDraw(); | |
| 183 // draw the bridge bitmap if it exists | |
| 184 canvas.drawBitmap(bridge.bitmap, 0, 0, paint); | |
| 185 | |
| 186 // also draw cursor if visible | |
| 187 if (bridge.buffer.isCursorVisible()) { | |
| 188 int cursorColumn = bridge.buffer.getCursorColumn(); | |
| 189 final int cursorRow = bridge.buffer.getCursorRow(); | |
| 190 final int columns = bridge.buffer.getColumns(); | |
| 191 | |
| 192 if (cursorColumn == columns) | |
| 193 cursorColumn = columns - 1; | |
| 194 | |
| 195 if (cursorColumn < 0 || cursorRow < 0) | |
| 196 return; | |
| 197 | |
| 198 int currentAttribute = bridge.buffer.getAttributes( | |
| 199 cursorColumn, cursorRow); | |
| 200 boolean onWideCharacter = (currentAttribute & VDUBuffer.FULLWIDTH) != 0; | |
| 201 int x = cursorColumn * bridge.charWidth; | |
| 202 int y = (bridge.buffer.getCursorRow() | |
| 203 + bridge.buffer.screenBase - bridge.buffer.windowBase) | |
| 204 * bridge.charHeight; | |
| 205 // Save the current clip and translation | |
| 206 canvas.save(); | |
| 207 canvas.translate(x, y); | |
| 208 canvas.clipRect(0, 0, | |
| 209 bridge.charWidth * (onWideCharacter ? 2 : 1), | |
| 210 bridge.charHeight); | |
| 211 canvas.drawPaint(cursorPaint); | |
| 212 final int deadKey = bridge.getKeyHandler().getDeadKey(); | |
| 213 | |
| 214 if (deadKey != 0) { | |
| 215 canvas.drawText(new char[] { (char)deadKey }, 0, 1, 0, 0, cursorStrokePaint); | |
| 216 } | |
| 217 | |
| 218 // Make sure we scale our decorations to the correct size. | |
| 219 canvas.concat(scaleMatrix); | |
| 220 int metaState = bridge.getKeyHandler().getMetaState(); | |
| 221 | |
| 222 if ((metaState & TerminalKeyListener.META_SHIFT_ON) != 0) | |
| 223 canvas.drawPath(shiftCursor, cursorStrokePaint); | |
| 224 else if ((metaState & TerminalKeyListener.META_SHIFT_LOCK) != 0) | |
| 225 canvas.drawPath(shiftCursor, cursorPaint); | |
| 226 | |
| 227 if ((metaState & TerminalKeyListener.META_ALT_ON) != 0) | |
| 228 canvas.drawPath(altCursor, cursorStrokePaint); | |
| 229 else if ((metaState & TerminalKeyListener.META_ALT_LOCK) != 0) | |
| 230 canvas.drawPath(altCursor, cursorPaint); | |
| 231 | |
| 232 if ((metaState & TerminalKeyListener.META_CTRL_ON) != 0) | |
| 233 canvas.drawPath(ctrlCursor, cursorStrokePaint); | |
| 234 else if ((metaState & TerminalKeyListener.META_CTRL_LOCK) != 0) | |
| 235 canvas.drawPath(ctrlCursor, cursorPaint); | |
| 236 | |
|
457
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
237 canvas.restore(); // Restore previous clip region |
| 0 | 238 } |
| 239 | |
| 240 // draw any highlighted area | |
| 241 if (bridge.isSelectingForCopy()) { | |
| 242 SelectionArea area = bridge.getSelectionArea(); | |
|
457
105815cce146
minimum version android 5, target and compile version api 28
Carl Byington <carl@five-ten-sg.com>
parents:
438
diff
changeset
|
243 canvas.save(); |
| 0 | 244 canvas.clipRect( |
| 245 area.getLeft() * bridge.charWidth, | |
| 246 area.getTop() * bridge.charHeight, | |
| 247 (area.getRight() + 1) * bridge.charWidth, | |
| 248 (area.getBottom() + 1) * bridge.charHeight | |
| 249 ); | |
| 250 canvas.drawPaint(cursorPaint); | |
| 251 canvas.restore(); | |
| 252 } | |
| 253 } | |
| 254 } | |
| 255 | |
| 256 public void notifyUser(String message) { | |
|
419
9045b1af94e5
revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
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; |
|
9045b1af94e5
revert notifyUser() changes
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); |
|
9045b1af94e5
revert notifyUser() changes
Carl Byington <carl@five-ten-sg.com>
parents:
417
diff
changeset
|
274 } |
| 0 | 275 } |
| 276 | |
| 277 /** | |
| 278 * Ask the {@link TerminalBridge} we're connected to to resize to a specific size. | |
| 279 * @param width | |
| 280 * @param height | |
| 281 */ | |
| 282 public void forceSize(int width, int height) { | |
| 283 bridge.resizeComputed(width, height, getWidth(), getHeight()); | |
| 284 } | |
| 285 | |
| 286 /** | |
| 287 * Sets the ability for the TerminalView to display Toast notifications to the user. | |
| 288 * @param value whether to enable notifications or not | |
| 289 */ | |
| 290 public void setNotifications(boolean value) { | |
| 291 notifications = value; | |
| 292 } | |
| 293 | |
| 294 @Override | |
| 295 public boolean onCheckIsTextEditor() { | |
| 296 return true; | |
| 297 } | |
| 298 | |
| 299 @Override | |
| 300 public InputConnection onCreateInputConnection(EditorInfo outAttrs) { | |
| 301 outAttrs.imeOptions |= | |
| 302 EditorInfo.IME_FLAG_NO_EXTRACT_UI | | |
| 303 EditorInfo.IME_FLAG_NO_ENTER_ACTION | | |
| 304 EditorInfo.IME_ACTION_NONE; | |
| 305 outAttrs.inputType = EditorInfo.TYPE_NULL; | |
| 306 return new BaseInputConnection(this, false) { | |
| 307 @Override | |
| 308 public boolean deleteSurroundingText(int leftLength, int rightLength) { | |
| 309 if (rightLength == 0 && leftLength == 0) { | |
| 310 return this.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL)); | |
| 311 } | |
| 312 | |
| 313 for (int i = 0; i < leftLength; i++) { | |
| 314 this.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL)); | |
| 315 } | |
| 316 | |
| 317 // TODO: forward delete | |
| 318 return true; | |
| 319 } | |
| 320 }; | |
| 321 } | |
| 322 | |
| 323 public void propagateConsoleText(char[] rawText, int length) { | |
| 324 if (mAccessibilityActive) { | |
| 325 synchronized (mAccessibilityLock) { | |
| 326 mAccessibilityBuffer.append(rawText, 0, length); | |
| 327 } | |
| 328 | |
| 329 if (mAccessibilityInitialized) { | |
| 330 if (mEventSender != null) { | |
| 331 removeCallbacks(mEventSender); | |
| 332 } | |
| 333 else { | |
| 334 mEventSender = new AccessibilityEventSender(); | |
| 335 } | |
| 336 | |
| 337 postDelayed(mEventSender, ACCESSIBILITY_EVENT_THRESHOLD); | |
| 338 } | |
| 339 } | |
| 340 } | |
| 341 | |
| 342 private class AccessibilityEventSender implements Runnable { | |
| 343 public void run() { | |
| 344 synchronized (mAccessibilityLock) { | |
| 345 if (mCodeMatcher == null) { | |
| 346 mCodeMatcher = mControlCodes.matcher(mAccessibilityBuffer); | |
| 347 } | |
| 348 else { | |
| 349 mCodeMatcher.reset(mAccessibilityBuffer); | |
| 350 } | |
| 351 | |
| 352 // Strip all control codes out. | |
| 353 mAccessibilityBuffer = new StringBuffer(mCodeMatcher.replaceAll(" ")); | |
| 354 // Apply Backspaces using backspace character sequence | |
| 355 int i = mAccessibilityBuffer.indexOf(BACKSPACE_CODE); | |
| 356 | |
| 357 while (i != -1) { | |
| 358 mAccessibilityBuffer = mAccessibilityBuffer.replace(i == 0 ? 0 : i - 1, i | |
| 359 + BACKSPACE_CODE.length(), ""); | |
| 360 i = mAccessibilityBuffer.indexOf(BACKSPACE_CODE); | |
| 361 } | |
| 362 | |
| 363 if (mAccessibilityBuffer.length() > 0) { | |
| 364 AccessibilityEvent event = AccessibilityEvent.obtain( | |
| 365 AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED); | |
| 366 event.setFromIndex(0); | |
| 367 event.setAddedCount(mAccessibilityBuffer.length()); | |
| 368 event.getText().add(mAccessibilityBuffer); | |
| 369 sendAccessibilityEventUnchecked(event); | |
| 370 mAccessibilityBuffer.setLength(0); | |
| 371 } | |
| 372 } | |
| 373 } | |
| 374 } | |
| 375 | |
| 376 private class AccessibilityStateTester extends AsyncTask<Void, Void, Boolean> { | |
| 377 @Override | |
| 378 protected Boolean doInBackground(Void... params) { | |
| 379 /* | |
| 380 * Presumably if the accessibility manager is not enabled, we don't | |
| 381 * need to send accessibility events. | |
| 382 */ | |
| 383 final AccessibilityManager accessibility = (AccessibilityManager) context | |
| 384 .getSystemService(Context.ACCESSIBILITY_SERVICE); | |
| 385 | |
| 386 if (!accessibility.isEnabled()) { | |
| 387 return false; | |
| 388 } | |
| 389 | |
| 390 /* | |
| 391 * Restrict the set of intents to only accessibility services that | |
| 392 * have the category FEEDBACK_SPOKEN (aka, screen readers). | |
| 393 */ | |
| 394 final Intent screenReaderIntent = new Intent(SCREENREADER_INTENT_ACTION); | |
| 395 screenReaderIntent.addCategory(SCREENREADER_INTENT_CATEGORY); | |
| 396 final ContentResolver cr = context.getContentResolver(); | |
| 397 final List<ResolveInfo> screenReaders = context.getPackageManager().queryIntentServices( | |
| 398 screenReaderIntent, 0); | |
| 399 boolean foundScreenReader = false; | |
| 400 final int N = screenReaders.size(); | |
| 401 | |
| 402 for (int i = 0; i < N; i++) { | |
| 403 final ResolveInfo screenReader = screenReaders.get(i); | |
| 404 /* | |
| 405 * All screen readers are expected to implement a content | |
| 406 * provider that responds to: | |
| 407 * content://<nameofpackage>.providers.StatusProvider | |
| 408 */ | |
| 409 final Cursor cursor = cr.query( | |
| 410 Uri.parse("content://" + screenReader.serviceInfo.packageName | |
| 411 + ".providers.StatusProvider"), null, null, null, null); | |
| 412 | |
| 413 if (cursor != null && cursor.moveToFirst()) { | |
| 414 /* | |
| 415 * These content providers use a special cursor that only has | |
| 416 * one element, an integer that is 1 if the screen reader is | |
| 417 * running. | |
| 418 */ | |
| 419 final int status = cursor.getInt(0); | |
| 420 cursor.close(); | |
| 421 | |
| 422 if (status == 1) { | |
| 423 foundScreenReader = true; | |
| 424 break; | |
| 425 } | |
| 426 } | |
| 427 } | |
| 428 | |
| 429 if (foundScreenReader) { | |
| 430 mControlCodes = Pattern.compile(CONTROL_CODE_PATTERN); | |
| 431 } | |
| 432 | |
| 433 return foundScreenReader; | |
| 434 } | |
| 435 | |
| 436 @Override | |
| 437 protected void onPostExecute(Boolean result) { | |
| 438 mAccessibilityActive = result; | |
| 439 mAccessibilityInitialized = true; | |
| 440 | |
| 441 if (result) { | |
| 442 mEventSender = new AccessibilityEventSender(); | |
| 443 postDelayed(mEventSender, ACCESSIBILITY_EVENT_THRESHOLD); | |
| 444 } | |
| 445 else { | |
| 446 mAccessibilityBuffer = null; | |
| 447 } | |
| 448 } | |
| 449 } | |
| 450 | |
| 451 private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener { | |
| 452 @Override | |
| 453 public boolean onScale(ScaleGestureDetector detector) { | |
| 454 float mScaleFactor = detector.getScaleFactor(); | |
| 455 | |
| 456 if (mScaleFactor > 1.1) { | |
| 457 bridge.increaseFontSize(); | |
| 458 return true; | |
| 459 } | |
| 460 else if (mScaleFactor < 0.9) { | |
| 461 bridge.decreaseFontSize(); | |
| 462 return true; | |
| 463 } | |
| 464 | |
| 465 return (false); | |
| 466 } | |
| 467 } | |
| 468 | |
| 469 } |