Mercurial > 510Connectbot
annotate src/com/five_ten_sg/connectbot/TerminalView.java @ 417:4dcc071e1feb
monitor failure should not kill the TE
| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Wed, 29 Oct 2014 12:12:48 -0700 |
| parents | e3b83c4f02f1 |
| children | 9045b1af94e5 |
| 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; | |
| 35 import android.graphics.Matrix; | |
| 36 import android.graphics.Paint; | |
| 37 import android.graphics.Path; | |
| 38 import android.graphics.PixelXorXfermode; | |
| 39 import android.graphics.RectF; | |
| 40 import android.net.Uri; | |
| 41 import android.os.AsyncTask; | |
| 42 import android.view.KeyEvent; | |
| 43 import android.view.View; | |
| 44 import android.view.ViewGroup.LayoutParams; | |
| 45 import android.view.accessibility.AccessibilityEvent; | |
| 46 import android.view.accessibility.AccessibilityManager; | |
| 47 import android.view.inputmethod.BaseInputConnection; | |
| 48 import android.view.inputmethod.EditorInfo; | |
| 49 import android.view.inputmethod.InputConnection; | |
| 50 import android.view.ScaleGestureDetector; | |
| 51 import android.widget.Toast; | |
| 52 import de.mud.terminal.VDUBuffer; | |
| 53 | |
| 54 /** | |
| 55 * User interface {@link View} for showing a TerminalBridge in an | |
| 56 * {@link Activity}. Handles drawing bitmap updates and passing keystrokes down | |
| 57 * to terminal. | |
| 58 * | |
| 59 * @author jsharkey | |
| 60 */ | |
| 61 public class TerminalView extends View implements FontSizeChangedListener { | |
| 62 | |
| 63 private final Context context; | |
|
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64 public final TerminalBridge bridge; |
| 0 | 65 private final Paint paint; |
| 66 private final Paint cursorPaint; | |
| 67 private final Paint cursorStrokePaint; | |
| 68 | |
| 69 // Cursor paints to distinguish modes | |
| 70 private Path ctrlCursor, altCursor, shiftCursor; | |
| 71 private RectF tempSrc, tempDst; | |
| 72 private Matrix scaleMatrix; | |
| 73 private static final Matrix.ScaleToFit scaleType = Matrix.ScaleToFit.FILL; | |
| 74 | |
| 75 private String lastNotification = null; | |
| 76 private volatile boolean notifications = true; | |
| 77 | |
| 78 // Related to Accessibility Features | |
| 79 private boolean mAccessibilityInitialized = false; | |
| 80 private boolean mAccessibilityActive = true; | |
| 81 private Object[] mAccessibilityLock = new Object[0]; | |
| 82 private StringBuffer mAccessibilityBuffer; | |
| 83 private Pattern mControlCodes = null; | |
| 84 private Matcher mCodeMatcher = null; | |
| 85 private AccessibilityEventSender mEventSender = null; | |
| 86 | |
| 23 | 87 |
| 0 | 88 private static final String BACKSPACE_CODE = "\\x08\\x1b\\[K"; |
| 89 private static final String CONTROL_CODE_PATTERN = "\\x1b\\[K[^m]+[m|:]"; | |
| 90 | |
| 91 private static final int ACCESSIBILITY_EVENT_THRESHOLD = 1000; | |
| 92 private static final String SCREENREADER_INTENT_ACTION = "android.accessibilityservice.AccessibilityService"; | |
| 93 private static final String SCREENREADER_INTENT_CATEGORY = "android.accessibilityservice.category.FEEDBACK_SPOKEN"; | |
| 94 | |
| 95 public ScaleGestureDetector mScaleDetector; | |
| 96 | |
| 97 public TerminalView(Context context, TerminalBridge bridge) { | |
| 98 super(context); | |
|
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parents:
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diff
changeset
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99 this.context = context; |
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33eb63352be5
remove 5250 configuration
Carl Byington <carl@five-ten-sg.com>
parents:
23
diff
changeset
|
100 this.bridge = bridge; |
| 0 | 101 paint = new Paint(); |
| 102 setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); | |
| 103 setFocusable(true); | |
| 104 setFocusableInTouchMode(true); | |
| 105 cursorPaint = new Paint(); | |
| 106 cursorPaint.setColor(bridge.color[bridge.defaultFg]); | |
| 107 cursorPaint.setXfermode(new PixelXorXfermode(bridge.color[bridge.defaultBg])); | |
| 108 cursorPaint.setAntiAlias(true); | |
| 109 cursorStrokePaint = new Paint(cursorPaint); | |
| 110 cursorStrokePaint.setStrokeWidth(0.1f); | |
| 111 cursorStrokePaint.setStyle(Paint.Style.STROKE); | |
| 112 /* | |
| 113 * Set up our cursor indicators on a 1x1 Path object which we can later | |
| 114 * transform to our character width and height | |
| 115 */ | |
| 116 // TODO make this into a resource somehow | |
| 117 shiftCursor = new Path(); | |
| 118 shiftCursor.lineTo(0.5f, 0.33f); | |
| 119 shiftCursor.lineTo(1.0f, 0.0f); | |
| 120 altCursor = new Path(); | |
| 121 altCursor.moveTo(0.0f, 1.0f); | |
| 122 altCursor.lineTo(0.5f, 0.66f); | |
| 123 altCursor.lineTo(1.0f, 1.0f); | |
| 124 ctrlCursor = new Path(); | |
| 125 ctrlCursor.moveTo(0.0f, 0.25f); | |
| 126 ctrlCursor.lineTo(1.0f, 0.5f); | |
| 127 ctrlCursor.lineTo(0.0f, 0.75f); | |
| 128 // For creating the transform when the terminal resizes | |
| 129 tempSrc = new RectF(); | |
| 130 tempSrc.set(0.0f, 0.0f, 1.0f, 1.0f); | |
| 131 tempDst = new RectF(); | |
| 132 scaleMatrix = new Matrix(); | |
| 133 bridge.addFontSizeChangedListener(this); | |
| 134 // connect our view up to the bridge | |
| 135 setOnKeyListener(bridge.getKeyHandler()); | |
| 136 mAccessibilityBuffer = new StringBuffer(); | |
| 137 // Enable accessibility features if a screen reader is active. | |
| 138 new AccessibilityStateTester().execute((Void) null); | |
| 139 mScaleDetector = new ScaleGestureDetector(context, new ScaleListener()); | |
| 140 } | |
| 141 | |
| 142 public void destroy() { | |
| 143 // tell bridge to destroy its bitmap | |
| 144 bridge.parentDestroyed(); | |
| 145 } | |
| 146 | |
| 147 @Override | |
| 148 protected void onSizeChanged(int w, int h, int oldw, int oldh) { | |
| 149 super.onSizeChanged(w, h, oldw, oldh); | |
| 150 bridge.parentChanged(this); | |
| 151 scaleCursors(); | |
| 152 } | |
| 153 | |
| 154 public void onFontSizeChanged(float size) { | |
| 155 scaleCursors(); | |
| 156 } | |
| 157 | |
| 158 private void scaleCursors() { | |
| 159 // Create a scale matrix to scale our 1x1 representation of the cursor | |
| 160 tempDst.set(0.0f, 0.0f, bridge.charWidth, bridge.charHeight); | |
| 161 scaleMatrix.setRectToRect(tempSrc, tempDst, scaleType); | |
| 162 } | |
| 163 | |
| 164 @Override | |
| 165 public void onDraw(Canvas canvas) { | |
| 166 if (bridge.bitmap != null) { | |
| 167 // draw the bitmap | |
| 168 bridge.onDraw(); | |
| 169 // draw the bridge bitmap if it exists | |
| 170 canvas.drawBitmap(bridge.bitmap, 0, 0, paint); | |
| 171 | |
| 172 // also draw cursor if visible | |
| 173 if (bridge.buffer.isCursorVisible()) { | |
| 174 int cursorColumn = bridge.buffer.getCursorColumn(); | |
| 175 final int cursorRow = bridge.buffer.getCursorRow(); | |
| 176 final int columns = bridge.buffer.getColumns(); | |
| 177 | |
| 178 if (cursorColumn == columns) | |
| 179 cursorColumn = columns - 1; | |
| 180 | |
| 181 if (cursorColumn < 0 || cursorRow < 0) | |
| 182 return; | |
| 183 | |
| 184 int currentAttribute = bridge.buffer.getAttributes( | |
| 185 cursorColumn, cursorRow); | |
| 186 boolean onWideCharacter = (currentAttribute & VDUBuffer.FULLWIDTH) != 0; | |
| 187 int x = cursorColumn * bridge.charWidth; | |
| 188 int y = (bridge.buffer.getCursorRow() | |
| 189 + bridge.buffer.screenBase - bridge.buffer.windowBase) | |
| 190 * bridge.charHeight; | |
| 191 // Save the current clip and translation | |
| 192 canvas.save(); | |
| 193 canvas.translate(x, y); | |
| 194 canvas.clipRect(0, 0, | |
| 195 bridge.charWidth * (onWideCharacter ? 2 : 1), | |
| 196 bridge.charHeight); | |
| 197 canvas.drawPaint(cursorPaint); | |
| 198 final int deadKey = bridge.getKeyHandler().getDeadKey(); | |
| 199 | |
| 200 if (deadKey != 0) { | |
| 201 canvas.drawText(new char[] { (char)deadKey }, 0, 1, 0, 0, cursorStrokePaint); | |
| 202 } | |
| 203 | |
| 204 // Make sure we scale our decorations to the correct size. | |
| 205 canvas.concat(scaleMatrix); | |
| 206 int metaState = bridge.getKeyHandler().getMetaState(); | |
| 207 | |
| 208 if ((metaState & TerminalKeyListener.META_SHIFT_ON) != 0) | |
| 209 canvas.drawPath(shiftCursor, cursorStrokePaint); | |
| 210 else if ((metaState & TerminalKeyListener.META_SHIFT_LOCK) != 0) | |
| 211 canvas.drawPath(shiftCursor, cursorPaint); | |
| 212 | |
| 213 if ((metaState & TerminalKeyListener.META_ALT_ON) != 0) | |
| 214 canvas.drawPath(altCursor, cursorStrokePaint); | |
| 215 else if ((metaState & TerminalKeyListener.META_ALT_LOCK) != 0) | |
| 216 canvas.drawPath(altCursor, cursorPaint); | |
| 217 | |
| 218 if ((metaState & TerminalKeyListener.META_CTRL_ON) != 0) | |
| 219 canvas.drawPath(ctrlCursor, cursorStrokePaint); | |
| 220 else if ((metaState & TerminalKeyListener.META_CTRL_LOCK) != 0) | |
| 221 canvas.drawPath(ctrlCursor, cursorPaint); | |
| 222 | |
| 223 // Restore previous clip region | |
| 224 canvas.restore(); | |
| 225 } | |
| 226 | |
| 227 // draw any highlighted area | |
| 228 if (bridge.isSelectingForCopy()) { | |
| 229 SelectionArea area = bridge.getSelectionArea(); | |
| 230 canvas.save(Canvas.CLIP_SAVE_FLAG); | |
| 231 canvas.clipRect( | |
| 232 area.getLeft() * bridge.charWidth, | |
| 233 area.getTop() * bridge.charHeight, | |
| 234 (area.getRight() + 1) * bridge.charWidth, | |
| 235 (area.getBottom() + 1) * bridge.charHeight | |
| 236 ); | |
| 237 canvas.drawPaint(cursorPaint); | |
| 238 canvas.restore(); | |
| 239 } | |
| 240 } | |
| 241 } | |
| 242 | |
| 243 public void notifyUser(String message) { | |
|
417
4dcc071e1feb
monitor failure should not kill the TE
Carl Byington <carl@five-ten-sg.com>
parents:
94
diff
changeset
|
244 if (!notifications) return; |
|
4dcc071e1feb
monitor failure should not kill the TE
Carl Byington <carl@five-ten-sg.com>
parents:
94
diff
changeset
|
245 // Don't keep telling the user the same thing. |
|
4dcc071e1feb
monitor failure should not kill the TE
Carl Byington <carl@five-ten-sg.com>
parents:
94
diff
changeset
|
246 if (lastNotification != null && lastNotification.equals(message)) return; |
|
4dcc071e1feb
monitor failure should not kill the TE
Carl Byington <carl@five-ten-sg.com>
parents:
94
diff
changeset
|
247 Toast notification = Toast.makeText(context, message, Toast.LENGTH_SHORT); |
|
4dcc071e1feb
monitor failure should not kill the TE
Carl Byington <carl@five-ten-sg.com>
parents:
94
diff
changeset
|
248 notification.show(); |
| 0 | 249 lastNotification = message; |
| 250 } | |
| 251 | |
| 252 /** | |
| 253 * Ask the {@link TerminalBridge} we're connected to to resize to a specific size. | |
| 254 * @param width | |
| 255 * @param height | |
| 256 */ | |
| 257 public void forceSize(int width, int height) { | |
| 258 bridge.resizeComputed(width, height, getWidth(), getHeight()); | |
| 259 } | |
| 260 | |
| 261 /** | |
| 262 * Sets the ability for the TerminalView to display Toast notifications to the user. | |
| 263 * @param value whether to enable notifications or not | |
| 264 */ | |
| 265 public void setNotifications(boolean value) { | |
| 266 notifications = value; | |
| 267 } | |
| 268 | |
| 269 @Override | |
| 270 public boolean onCheckIsTextEditor() { | |
| 271 return true; | |
| 272 } | |
| 273 | |
| 274 @Override | |
| 275 public InputConnection onCreateInputConnection(EditorInfo outAttrs) { | |
| 276 outAttrs.imeOptions |= | |
| 277 EditorInfo.IME_FLAG_NO_EXTRACT_UI | | |
| 278 EditorInfo.IME_FLAG_NO_ENTER_ACTION | | |
| 279 EditorInfo.IME_ACTION_NONE; | |
| 280 outAttrs.inputType = EditorInfo.TYPE_NULL; | |
| 281 return new BaseInputConnection(this, false) { | |
| 282 @Override | |
| 283 public boolean deleteSurroundingText(int leftLength, int rightLength) { | |
| 284 if (rightLength == 0 && leftLength == 0) { | |
| 285 return this.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL)); | |
| 286 } | |
| 287 | |
| 288 for (int i = 0; i < leftLength; i++) { | |
| 289 this.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL)); | |
| 290 } | |
| 291 | |
| 292 // TODO: forward delete | |
| 293 return true; | |
| 294 } | |
| 295 }; | |
| 296 } | |
| 297 | |
| 298 public void propagateConsoleText(char[] rawText, int length) { | |
| 299 if (mAccessibilityActive) { | |
| 300 synchronized (mAccessibilityLock) { | |
| 301 mAccessibilityBuffer.append(rawText, 0, length); | |
| 302 } | |
| 303 | |
| 304 if (mAccessibilityInitialized) { | |
| 305 if (mEventSender != null) { | |
| 306 removeCallbacks(mEventSender); | |
| 307 } | |
| 308 else { | |
| 309 mEventSender = new AccessibilityEventSender(); | |
| 310 } | |
| 311 | |
| 312 postDelayed(mEventSender, ACCESSIBILITY_EVENT_THRESHOLD); | |
| 313 } | |
| 314 } | |
| 315 } | |
| 316 | |
| 317 private class AccessibilityEventSender implements Runnable { | |
| 318 public void run() { | |
| 319 synchronized (mAccessibilityLock) { | |
| 320 if (mCodeMatcher == null) { | |
| 321 mCodeMatcher = mControlCodes.matcher(mAccessibilityBuffer); | |
| 322 } | |
| 323 else { | |
| 324 mCodeMatcher.reset(mAccessibilityBuffer); | |
| 325 } | |
| 326 | |
| 327 // Strip all control codes out. | |
| 328 mAccessibilityBuffer = new StringBuffer(mCodeMatcher.replaceAll(" ")); | |
| 329 // Apply Backspaces using backspace character sequence | |
| 330 int i = mAccessibilityBuffer.indexOf(BACKSPACE_CODE); | |
| 331 | |
| 332 while (i != -1) { | |
| 333 mAccessibilityBuffer = mAccessibilityBuffer.replace(i == 0 ? 0 : i - 1, i | |
| 334 + BACKSPACE_CODE.length(), ""); | |
| 335 i = mAccessibilityBuffer.indexOf(BACKSPACE_CODE); | |
| 336 } | |
| 337 | |
| 338 if (mAccessibilityBuffer.length() > 0) { | |
| 339 AccessibilityEvent event = AccessibilityEvent.obtain( | |
| 340 AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED); | |
| 341 event.setFromIndex(0); | |
| 342 event.setAddedCount(mAccessibilityBuffer.length()); | |
| 343 event.getText().add(mAccessibilityBuffer); | |
| 344 sendAccessibilityEventUnchecked(event); | |
| 345 mAccessibilityBuffer.setLength(0); | |
| 346 } | |
| 347 } | |
| 348 } | |
| 349 } | |
| 350 | |
| 351 private class AccessibilityStateTester extends AsyncTask<Void, Void, Boolean> { | |
| 352 @Override | |
| 353 protected Boolean doInBackground(Void... params) { | |
| 354 /* | |
| 355 * Presumably if the accessibility manager is not enabled, we don't | |
| 356 * need to send accessibility events. | |
| 357 */ | |
| 358 final AccessibilityManager accessibility = (AccessibilityManager) context | |
| 359 .getSystemService(Context.ACCESSIBILITY_SERVICE); | |
| 360 | |
| 361 if (!accessibility.isEnabled()) { | |
| 362 return false; | |
| 363 } | |
| 364 | |
| 365 /* | |
| 366 * Restrict the set of intents to only accessibility services that | |
| 367 * have the category FEEDBACK_SPOKEN (aka, screen readers). | |
| 368 */ | |
| 369 final Intent screenReaderIntent = new Intent(SCREENREADER_INTENT_ACTION); | |
| 370 screenReaderIntent.addCategory(SCREENREADER_INTENT_CATEGORY); | |
| 371 final ContentResolver cr = context.getContentResolver(); | |
| 372 final List<ResolveInfo> screenReaders = context.getPackageManager().queryIntentServices( | |
| 373 screenReaderIntent, 0); | |
| 374 boolean foundScreenReader = false; | |
| 375 final int N = screenReaders.size(); | |
| 376 | |
| 377 for (int i = 0; i < N; i++) { | |
| 378 final ResolveInfo screenReader = screenReaders.get(i); | |
| 379 /* | |
| 380 * All screen readers are expected to implement a content | |
| 381 * provider that responds to: | |
| 382 * content://<nameofpackage>.providers.StatusProvider | |
| 383 */ | |
| 384 final Cursor cursor = cr.query( | |
| 385 Uri.parse("content://" + screenReader.serviceInfo.packageName | |
| 386 + ".providers.StatusProvider"), null, null, null, null); | |
| 387 | |
| 388 if (cursor != null && cursor.moveToFirst()) { | |
| 389 /* | |
| 390 * These content providers use a special cursor that only has | |
| 391 * one element, an integer that is 1 if the screen reader is | |
| 392 * running. | |
| 393 */ | |
| 394 final int status = cursor.getInt(0); | |
| 395 cursor.close(); | |
| 396 | |
| 397 if (status == 1) { | |
| 398 foundScreenReader = true; | |
| 399 break; | |
| 400 } | |
| 401 } | |
| 402 } | |
| 403 | |
| 404 if (foundScreenReader) { | |
| 405 mControlCodes = Pattern.compile(CONTROL_CODE_PATTERN); | |
| 406 } | |
| 407 | |
| 408 return foundScreenReader; | |
| 409 } | |
| 410 | |
| 411 @Override | |
| 412 protected void onPostExecute(Boolean result) { | |
| 413 mAccessibilityActive = result; | |
| 414 mAccessibilityInitialized = true; | |
| 415 | |
| 416 if (result) { | |
| 417 mEventSender = new AccessibilityEventSender(); | |
| 418 postDelayed(mEventSender, ACCESSIBILITY_EVENT_THRESHOLD); | |
| 419 } | |
| 420 else { | |
| 421 mAccessibilityBuffer = null; | |
| 422 } | |
| 423 } | |
| 424 } | |
| 425 | |
| 426 private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener { | |
| 427 @Override | |
| 428 public boolean onScale(ScaleGestureDetector detector) { | |
| 429 float mScaleFactor = detector.getScaleFactor(); | |
| 430 | |
| 431 if (mScaleFactor > 1.1) { | |
| 432 bridge.increaseFontSize(); | |
| 433 return true; | |
| 434 } | |
| 435 else if (mScaleFactor < 0.9) { | |
| 436 bridge.decreaseFontSize(); | |
| 437 return true; | |
| 438 } | |
| 439 | |
| 440 return (false); | |
| 441 } | |
| 442 } | |
| 443 | |
| 444 } |