Remove AccessibilityInjector support.

content/public/android/java/src/org/chromium/content/browser/accessibility/JellyBeanAccessibilityInjector.java

Index: content/public/android/java/src/org/chromium/content/browser/accessibility/JellyBeanAccessibilityInjector.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/accessibility/JellyBeanAccessibilityInjector.java b/content/public/android/java/src/org/chromium/content/browser/accessibility/JellyBeanAccessibilityInjector.java
deleted file mode 100644
index 67b4dca387afb9b648f0269fca93bb7fed563d29..0000000000000000000000000000000000000000
--- a/content/public/android/java/src/org/chromium/content/browser/accessibility/JellyBeanAccessibilityInjector.java
+++ /dev/null
@@ -1,268 +0,0 @@
-// Copyright 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.content.browser.accessibility;
-
-import android.annotation.TargetApi;
-import android.content.Context;
-import android.os.Build;
-import android.os.Bundle;
-import android.os.SystemClock;
-import android.view.accessibility.AccessibilityNodeInfo;
-
-import org.chromium.content.browser.ContentViewCore;
-import org.chromium.content.browser.JavascriptInterface;
-import org.json.JSONException;
-import org.json.JSONObject;
-
-import java.util.Iterator;
-import java.util.Locale;
-import java.util.concurrent.atomic.AtomicInteger;
-
-/**
- * Handles injecting accessibility Javascript and related Javascript -> Java APIs for JB and newer
- * devices.
- */
-@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
-class JellyBeanAccessibilityInjector extends AccessibilityInjector {
-    private CallbackHandler mCallback;
-    private JSONObject mAccessibilityJSONObject;
-
-    private static final String ALIAS_TRAVERSAL_JS_INTERFACE = "accessibilityTraversal";
-
-    // Template for JavaScript that performs AndroidVox actions.
-    private static final String ACCESSIBILITY_ANDROIDVOX_TEMPLATE =
-            "cvox.AndroidVox.performAction('%1s')";
-
-    /**
-     * Constructs an instance of the JellyBeanAccessibilityInjector.
-     * @param view The ContentViewCore that this AccessibilityInjector manages.
-     */
-    protected JellyBeanAccessibilityInjector(ContentViewCore view) {
-        super(view);
-    }
-
-    @Override
-    @SuppressWarnings("deprecation")
-    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
-        info.setMovementGranularities(AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER
-                | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD
-                | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_LINE
-                | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH
-                | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PAGE);
-        info.addAction(AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY);
-        info.addAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY);
-        info.addAction(AccessibilityNodeInfo.ACTION_NEXT_HTML_ELEMENT);
-        info.addAction(AccessibilityNodeInfo.ACTION_PREVIOUS_HTML_ELEMENT);
-        info.addAction(AccessibilityNodeInfo.ACTION_CLICK);
-        info.setClickable(true);
-    }
-
-    @Override
-    public boolean supportsAccessibilityAction(int action) {
-        if (action == AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY
-                || action == AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY
-                || action == AccessibilityNodeInfo.ACTION_NEXT_HTML_ELEMENT
-                || action == AccessibilityNodeInfo.ACTION_PREVIOUS_HTML_ELEMENT
-                || action == AccessibilityNodeInfo.ACTION_CLICK) {
-            return true;
-        }
-
-        return false;
-    }
-
-    @Override
-    public boolean performAccessibilityAction(int action, Bundle arguments) {
-        if (!accessibilityIsAvailable() || !mContentViewCore.isAlive()
-                || !mInjectedScriptEnabled || !mScriptInjected) {
-            return false;
-        }
-
-        boolean actionSuccessful = sendActionToAndroidVox(action, arguments);
-
-        if (actionSuccessful) mContentViewCore.getWebContents().showImeIfNeeded();
-
-        return actionSuccessful;
-    }
-
-    @Override
-    protected void addAccessibilityApis() {
-        super.addAccessibilityApis();
-
-        Context context = mContentViewCore.getContext();
-        if (context != null && mCallback == null) {
-            mCallback = new CallbackHandler(ALIAS_TRAVERSAL_JS_INTERFACE);
-            mContentViewCore.addJavascriptInterface(mCallback, ALIAS_TRAVERSAL_JS_INTERFACE);
-        }
-    }
-
-    @Override
-    protected void removeAccessibilityApis() {
-        super.removeAccessibilityApis();
-
-        if (mCallback != null) {
-            mContentViewCore.removeJavascriptInterface(ALIAS_TRAVERSAL_JS_INTERFACE);
-            mCallback = null;
-        }
-    }
-
-    /**
-     * Packs an accessibility action into a JSON object and sends it to AndroidVox.
-     *
-     * @param action The action identifier.
-     * @param arguments The action arguments, if applicable.
-     * @return The result of the action.
-     */
-    private boolean sendActionToAndroidVox(int action, Bundle arguments) {
-        if (mCallback == null) return false;
-        if (mAccessibilityJSONObject == null) {
-            mAccessibilityJSONObject = new JSONObject();
-        } else {
-            // Remove all keys from the object.
-            final Iterator<?> keys = mAccessibilityJSONObject.keys();
-            while (keys.hasNext()) {
-                keys.next();
-                keys.remove();
-            }
-        }
-
-        try {
-            mAccessibilityJSONObject.accumulate("action", action);
-            if (arguments != null) {
-                if (action == AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY || action
-                        == AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY) {
-                    final int granularity = arguments.getInt(
-                            AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT);
-                    mAccessibilityJSONObject.accumulate("granularity", granularity);
-                } else if (action == AccessibilityNodeInfo.ACTION_NEXT_HTML_ELEMENT
-                        || action == AccessibilityNodeInfo.ACTION_PREVIOUS_HTML_ELEMENT) {
-                    final String element = arguments.getString(
-                            AccessibilityNodeInfo.ACTION_ARGUMENT_HTML_ELEMENT_STRING);
-                    mAccessibilityJSONObject.accumulate("element", element);
-                }
-            }
-        } catch (JSONException ex) {
-            return false;
-        }
-
-        final String jsonString = mAccessibilityJSONObject.toString();
-        final String jsCode = String.format(Locale.US, ACCESSIBILITY_ANDROIDVOX_TEMPLATE,
-                jsonString);
-        return mCallback.performAction(mContentViewCore, jsCode);
-    }
-
-    private static class CallbackHandler {
-        private static final String JAVASCRIPT_ACTION_TEMPLATE = "(function() {"
-                + "  retVal = false;"
-                + "  try {"
-                + "    retVal = %s;"
-                + "  } catch (e) {"
-                + "    retVal = false;"
-                + "  }"
-                + "  %s.onResult(%d, retVal);"
-                + "})()";
-
-        // Time in milliseconds to wait for a result before failing.
-        private static final long RESULT_TIMEOUT = 5000;
-
-        private final AtomicInteger mResultIdCounter = new AtomicInteger();
-        private final Object mResultLock = new Object();
-        private final String mInterfaceName;
-
-        private boolean mResult = false;
-        private long mResultId = -1;
-
-        private CallbackHandler(String interfaceName) {
-            mInterfaceName = interfaceName;
-        }
-
-        /**
-         * Performs an action and attempts to wait for a result.
-         *
-         * @param contentView The ContentViewCore to perform the action on.
-         * @param code Javascript code that evaluates to a result.
-         * @return The result of the action.
-         */
-        private boolean performAction(ContentViewCore contentView, String code) {
-            final int resultId = mResultIdCounter.getAndIncrement();
-            final String js = String.format(Locale.US, JAVASCRIPT_ACTION_TEMPLATE, code,
-                    mInterfaceName, resultId);
-            contentView.getWebContents().evaluateJavaScript(js, null);
-
-            return getResultAndClear(resultId);
-        }
-
-        /**
-         * Gets the result of a request to perform an accessibility action.
-         *
-         * @param resultId The result id to match the result with the request.
-         * @return The result of the request.
-         */
-        private boolean getResultAndClear(int resultId) {
-            synchronized (mResultLock) {
-                final boolean success = waitForResultTimedLocked(resultId);
-                final boolean result = success ? mResult : false;
-                clearResultLocked();
-                return result;
-            }
-        }
-
-        /**
-         * Clears the result state.
-         */
-        private void clearResultLocked() {
-            mResultId = -1;
-            mResult = false;
-        }
-
-        /**
-         * Waits up to a given bound for a result of a request and returns it.
-         *
-         * @param resultId The result id to match the result with the request.
-         * @return Whether the result was received.
-         */
-        private boolean waitForResultTimedLocked(int resultId) {
-            long waitTimeMillis = RESULT_TIMEOUT;
-            final long startTimeMillis = SystemClock.uptimeMillis();
-            while (true) {
-                try {
-                    if (mResultId == resultId) return true;
-                    if (mResultId > resultId) return false;
-                    final long elapsedTimeMillis = SystemClock.uptimeMillis() - startTimeMillis;
-                    waitTimeMillis = RESULT_TIMEOUT - elapsedTimeMillis;
-                    if (waitTimeMillis <= 0) return false;
-                    mResultLock.wait(waitTimeMillis);
-                } catch (InterruptedException ie) {
-                    /* ignore */
-                }
-            }
-        }
-
-        /**
-         * Callback exposed to JavaScript.  Handles returning the result of a
-         * request to a waiting (or potentially timed out) thread.
-         *
-         * @param id The result id of the request as a {@link String}.
-         * @param result The result of a request as a {@link String}.
-         */
-        @JavascriptInterface
-        @SuppressWarnings("unused")
-        public void onResult(String id, String result) {
-            final long resultId;
-            try {
-                resultId = Long.parseLong(id);
-            } catch (NumberFormatException e) {
-                return;
-            }
-
-            synchronized (mResultLock) {
-                if (resultId > mResultId) {
-                    mResult = Boolean.parseBoolean(result);
-                    mResultId = resultId;
-                }
-                mResultLock.notifyAll();
-            }
-        }
-    }
-}