Revert 207875 "Native Android accessibility."

trunk/src/content/public/android/java/src/org/chromium/content/browser/accessibility/BrowserAccessibilityManager.java

Index: trunk/src/content/public/android/java/src/org/chromium/content/browser/accessibility/BrowserAccessibilityManager.java
===================================================================
--- trunk/src/content/public/android/java/src/org/chromium/content/browser/accessibility/BrowserAccessibilityManager.java	(revision 207890)
+++ trunk/src/content/public/android/java/src/org/chromium/content/browser/accessibility/BrowserAccessibilityManager.java	(working copy)
@@ -1,419 +0,0 @@
-// Copyright (c) 2013 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.content.Context;
-import android.graphics.Rect;
-import android.os.Bundle;
-import android.view.MotionEvent;
-import android.view.View;
-import android.view.accessibility.AccessibilityEvent;
-import android.view.accessibility.AccessibilityManager;
-import android.view.accessibility.AccessibilityNodeInfo;
-import android.view.accessibility.AccessibilityNodeProvider;
-import android.view.inputmethod.InputMethodManager;
-
-import org.chromium.base.CalledByNative;
-import org.chromium.base.JNINamespace;
-import org.chromium.content.browser.ContentViewCore;
-import org.chromium.content.browser.RenderCoordinates;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Native accessibility for a {@link ContentViewCore}.
- */
-@JNINamespace("content")
-public class BrowserAccessibilityManager extends AccessibilityNodeProvider {
-    private static final String TAG = BrowserAccessibilityManager.class.getSimpleName();
-
-    private ContentViewCore mContentViewCore;
-    private AccessibilityManager mAccessibilityManager;
-    private RenderCoordinates mRenderCoordinates;
-    private int mNativeObj;
-    private int mAccessibilityFocusId;
-    private final int[] mTempLocation = new int[2];
-    private View mView;
-    private boolean mUserHasTouchExplored;
-    private boolean mFrameInfoInitialized;
-
-    // If this is true, enables an experimental feature that focuses the web page after it
-    // finishes loading. Disabled for now because it can be confusing if the user was
-    // trying to do something when this happens.
-    private boolean mFocusPageOnLoad;
-
-    /**
-     * Create a BrowserAccessibilityManager object, which is owned by the C++
-     * BrowserAccessibilityManagerAndroid instance, and connects to the content view.
-     * @param nativeBrowserAccessibilityManagerAndroid A pointer to the counterpart native
-     *     C++ object that owns this object.
-     * @param contentViewCore The content view that this object provides accessibility for.
-     */
-    @CalledByNative
-    private static BrowserAccessibilityManager create(int nativeBrowserAccessibilityManagerAndroid,
-            ContentViewCore contentViewCore) {
-        return new BrowserAccessibilityManager(
-            nativeBrowserAccessibilityManagerAndroid, contentViewCore);
-    }
-
-    private BrowserAccessibilityManager(int nativeBrowserAccessibilityManagerAndroid,
-            ContentViewCore contentViewCore) {
-        mNativeObj = nativeBrowserAccessibilityManagerAndroid;
-        mContentViewCore = contentViewCore;
-        mContentViewCore.setBrowserAccessibilityManager(this);
-        mAccessibilityFocusId = View.NO_ID;
-        mView = mContentViewCore.getContainerView();
-        mRenderCoordinates = mContentViewCore.getRenderCoordinates();
-        mAccessibilityManager =
-            (AccessibilityManager) mContentViewCore.getContext()
-            .getSystemService(Context.ACCESSIBILITY_SERVICE);
-    }
-
-    @CalledByNative
-    private void onNativeObjectDestroyed() {
-        if (mContentViewCore.getBrowserAccessibilityManager() == this) {
-            mContentViewCore.setBrowserAccessibilityManager(null);
-        }
-        mNativeObj = 0;
-        mContentViewCore = null;
-    }
-
-    @Override
-    public AccessibilityNodeInfo createAccessibilityNodeInfo(int virtualViewId) {
-        if (!mAccessibilityManager.isEnabled() || mNativeObj == 0 || !mFrameInfoInitialized) {
-            return null;
-        }
-
-        int rootId = nativeGetRootId(mNativeObj);
-        if (virtualViewId == View.NO_ID) {
-            virtualViewId = rootId;
-        }
-        if (mAccessibilityFocusId == View.NO_ID) {
-            mAccessibilityFocusId = rootId;
-        }
-
-        final AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(mView);
-        info.setPackageName(mContentViewCore.getContext().getPackageName());
-        info.setSource(mView, virtualViewId);
-
-        if (nativePopulateAccessibilityNodeInfo(mNativeObj, info, virtualViewId)) {
-            return info;
-        } else {
-            return null;
-        }
-    }
-
-    /** @inheritDoc */
-    public List<AccessibilityNodeInfo> findAccessibilityNodeInfosByText(String text,
-            int virtualViewId) {
-        return new ArrayList<AccessibilityNodeInfo>();
-    }
-
-    /** @inheritDoc */
-    public boolean performAction(int virtualViewId, int action, Bundle arguments) {
-        if (!mAccessibilityManager.isEnabled() || mNativeObj == 0) {
-            return false;
-        }
-
-        switch (action) {
-            case AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS:
-                if (mAccessibilityFocusId == virtualViewId) {
-                    return true;
-                }
-
-                if (mAccessibilityFocusId != View.NO_ID) {
-                    sendAccessibilityEvent(mAccessibilityFocusId,
-                                           AccessibilityEvent.TYPE_VIEW_HOVER_EXIT);
-                }
-                mAccessibilityFocusId = virtualViewId;
-                sendAccessibilityEvent(mAccessibilityFocusId,
-                                       AccessibilityEvent.TYPE_VIEW_HOVER_ENTER);
-                return true;
-            case AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS:
-                if (mAccessibilityFocusId == virtualViewId) {
-                    mAccessibilityFocusId = View.NO_ID;
-                }
-                return true;
-            case AccessibilityNodeInfo.ACTION_CLICK:
-                nativeClick(mNativeObj, virtualViewId);
-                break;
-            case AccessibilityNodeInfo.ACTION_FOCUS:
-                nativeFocus(mNativeObj, virtualViewId);
-                break;
-            case AccessibilityNodeInfo.ACTION_CLEAR_FOCUS:
-                nativeBlur(mNativeObj);
-                break;
-            default:
-                break;
-        }
-        return false;
-    }
-
-    /**
-     * @see View#dispatchHoverEvent(MotionEvent)
-     */
-    public boolean dispatchHoverEvent(MotionEvent event) {
-        if (!mAccessibilityManager.isEnabled() || mNativeObj == 0) {
-            return false;
-        }
-
-        mUserHasTouchExplored = true;
-        float x = event.getX();
-        float y = event.getY();
-
-        // Offset by the location of the web content within the view.
-        // Note: the MotionEvent has view-relative coordinates already,
-        // so we don't have to offset by the view relative to the screen.
-        y -= mRenderCoordinates.getContentOffsetYPix();
-
-        // Convert to CSS coordinates.
-        int cssX = (int) (mRenderCoordinates.fromPixToLocalCss(x) +
-                          mRenderCoordinates.getScrollX());
-        int cssY = (int) (mRenderCoordinates.fromPixToLocalCss(y) +
-                          mRenderCoordinates.getScrollY());
-        int id = nativeHitTest(mNativeObj, cssX, cssY);
-        if (mAccessibilityFocusId != id) {
-            mAccessibilityFocusId = id;
-            sendAccessibilityEvent(id, AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED);
-        }
-
-        return true;
-    }
-
-    /**
-     * Called by ContentViewCore to notify us when the frame info is initialized,
-     * the first time, since until that point, we can't use mRenderCoordinates to transform
-     * web coordinates to screen coordinates.
-     */
-    public void notifyFrameInfoInitialized() {
-        if (mFrameInfoInitialized) return;
-
-        mFrameInfoInitialized = true;
-        // (Re-) focus focused element, since we weren't able to create an
-        // AccessibilityNodeInfo for this element before.
-        if (mAccessibilityFocusId != View.NO_ID) {
-            sendAccessibilityEvent(mAccessibilityFocusId,
-                                   AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED);
-        }
-    }
-
-    private void sendAccessibilityEvent(int virtualViewId, int eventType) {
-        if (!mAccessibilityManager.isEnabled() || mNativeObj == 0) return;
-
-        final AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
-        event.setPackageName(mContentViewCore.getContext().getPackageName());
-        int rootId = nativeGetRootId(mNativeObj);
-        if (virtualViewId == rootId) {
-            virtualViewId = View.NO_ID;
-        }
-        event.setSource(mView, virtualViewId);
-        if (!nativePopulateAccessibilityEvent(mNativeObj, event, virtualViewId, eventType)) return;
-
-        // This is currently needed if we want Android to draw the yellow box around
-        // the item that has accessibility focus. In practice, this doesn't seem to slow
-        // things down, because it's only called when the accessibility focus moves.
-        // TODO(dmazzoni): remove this if/when Android framework fixes bug.
-        mContentViewCore.getContainerView().postInvalidate();
-
-        mContentViewCore.getContainerView().requestSendAccessibilityEvent(mView, event);
-    }
-
-    @CalledByNative
-    private void handlePageLoaded(int id) {
-        if (mUserHasTouchExplored) return;
-
-        if (mFocusPageOnLoad) {
-            // Focus the natively focused node (usually document),
-            // if this feature is enabled.
-            mAccessibilityFocusId = id;
-            sendAccessibilityEvent(id, AccessibilityEvent.TYPE_VIEW_FOCUSED);
-        }
-    }
-
-    @CalledByNative
-    private void handleFocusChanged(int id) {
-        if (mAccessibilityFocusId == id) return;
-
-        mAccessibilityFocusId = id;
-        sendAccessibilityEvent(id, AccessibilityEvent.TYPE_VIEW_FOCUSED);
-    }
-
-    @CalledByNative
-    private void handleCheckStateChanged(int id) {
-        sendAccessibilityEvent(id, AccessibilityEvent.TYPE_VIEW_CLICKED);
-    }
-
-    @CalledByNative
-    private void handleTextSelectionChanged(int id) {
-        sendAccessibilityEvent(id, AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
-        sendAccessibilityEvent(id, AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
-    }
-
-    @CalledByNative
-    private void handleEditableTextChanged(int id) {
-        sendAccessibilityEvent(id, AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
-        sendAccessibilityEvent(id, AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
-    }
-
-    @CalledByNative
-    private void handleContentChanged(int id) {
-        sendAccessibilityEvent(id, AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
-    }
-
-    @CalledByNative
-    private void handleNavigate() {
-        mAccessibilityFocusId = View.NO_ID;
-        mUserHasTouchExplored = false;
-        mFrameInfoInitialized = false;
-    }
-
-    @CalledByNative
-    private void handleScrolledToAnchor(int id) {
-        if (mAccessibilityFocusId == id) {
-            return;
-        }
-
-        mAccessibilityFocusId = id;
-        sendAccessibilityEvent(id, AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED);
-    }
-
-    @CalledByNative
-    private void announceLiveRegionText(String text) {
-        mView.announceForAccessibility(text);
-    }
-
-    @CalledByNative
-    private void setAccessibilityNodeInfoParent(AccessibilityNodeInfo node, int parentId) {
-        node.setParent(mView, parentId);
-    }
-
-    @CalledByNative
-    private void addAccessibilityNodeInfoChild(AccessibilityNodeInfo node, int child_id) {
-        node.addChild(mView, child_id);
-    }
-
-    @CalledByNative
-    private void setAccessibilityNodeInfoBooleanAttributes(AccessibilityNodeInfo node,
-            boolean checkable, boolean checked, boolean clickable,
-            boolean enabled, boolean focusable, boolean focused, boolean password,
-            boolean scrollable, boolean selected, boolean visibleToUser) {
-        node.setCheckable(checkable);
-        node.setChecked(checked);
-        node.setClickable(clickable);
-        node.setEnabled(enabled);
-        node.setFocusable(focusable);
-        node.setFocused(focused);
-        node.setPassword(password);
-        node.setScrollable(scrollable);
-        node.setSelected(selected);
-        node.setVisibleToUser(visibleToUser);
-    }
-
-    @CalledByNative
-    private void setAccessibilityNodeInfoStringAttributes(AccessibilityNodeInfo node,
-            String className, String contentDescription) {
-        node.setClassName(className);
-        node.setContentDescription(contentDescription);
-    }
-
-    @CalledByNative
-    private void setAccessibilityNodeInfoLocation(AccessibilityNodeInfo node,
-            int absoluteLeft, int absoluteTop, int parentRelativeLeft, int parentRelativeTop,
-            int width, int height, boolean isRootNode) {
-        // First set the bounds in parent.
-        Rect boundsInParent = new Rect(parentRelativeLeft, parentRelativeTop,
-                parentRelativeLeft + width, parentRelativeTop + height);
-        if (isRootNode) {
-            // Offset of the web content relative to the View.
-            boundsInParent.offset(0, (int) mRenderCoordinates.getContentOffsetYPix());
-        }
-        node.setBoundsInParent(boundsInParent);
-
-        // Now set the absolute rect, which requires several transformations.
-        Rect rect = new Rect(absoluteLeft, absoluteTop, absoluteLeft + width, absoluteTop + height);
-
-        // Offset by the scroll position.
-        rect.offset(-(int) mRenderCoordinates.getScrollX(),
-                    -(int) mRenderCoordinates.getScrollY());
-
-        // Convert CSS (web) pixels to Android View pixels
-        rect.left = (int) mRenderCoordinates.fromLocalCssToPix(rect.left);
-        rect.top = (int) mRenderCoordinates.fromLocalCssToPix(rect.top);
-        rect.bottom = (int) mRenderCoordinates.fromLocalCssToPix(rect.bottom);
-        rect.right = (int) mRenderCoordinates.fromLocalCssToPix(rect.right);
-
-        // Offset by the location of the web content within the view.
-        rect.offset(0,
-                    (int) mRenderCoordinates.getContentOffsetYPix());
-
-        // Finally offset by the location of the view within the screen.
-        final int[] viewLocation = new int[2];
-        mView.getLocationOnScreen(viewLocation);
-        rect.offset(viewLocation[0], viewLocation[1]);
-
-        node.setBoundsInScreen(rect);
-    }
-
-    @CalledByNative
-    private void setAccessibilityEventBooleanAttributes(AccessibilityEvent event,
-            boolean checked, boolean enabled, boolean password, boolean scrollable) {
-        event.setChecked(checked);
-        event.setEnabled(enabled);
-        event.setPassword(password);
-        event.setScrollable(scrollable);
-    }
-
-    @CalledByNative
-    private void setAccessibilityEventClassName(AccessibilityEvent event, String className) {
-        event.setClassName(className);
-    }
-
-    @CalledByNative
-    private void setAccessibilityEventListAttributes(AccessibilityEvent event,
-            int currentItemIndex, int itemCount) {
-        event.setCurrentItemIndex(currentItemIndex);
-        event.setItemCount(itemCount);
-    }
-
-    @CalledByNative
-    private void setAccessibilityEventScrollAttributes(AccessibilityEvent event,
-            int scrollX, int scrollY, int maxScrollX, int maxScrollY) {
-        event.setScrollX(scrollX);
-        event.setScrollY(scrollY);
-        event.setMaxScrollX(maxScrollX);
-        event.setMaxScrollY(maxScrollY);
-    }
-
-    @CalledByNative
-    private void setAccessibilityEventTextChangedAttrs(AccessibilityEvent event,
-            int fromIndex, int addedCount, int removedCount, String beforeText, String text) {
-        event.setFromIndex(fromIndex);
-        event.setAddedCount(addedCount);
-        event.setRemovedCount(removedCount);
-        event.setBeforeText(beforeText);
-        event.getText().add(text);
-    }
-
-    @CalledByNative
-    private void setAccessibilityEventSelectionAttrs(AccessibilityEvent event,
-            int fromIndex, int addedCount, int itemCount, String text) {
-        event.setFromIndex(fromIndex);
-        event.setAddedCount(addedCount);
-        event.setItemCount(itemCount);
-        event.getText().add(text);
-    }
-
-    private native int nativeGetRootId(int nativeBrowserAccessibilityManagerAndroid);
-    private native int nativeHitTest(int nativeBrowserAccessibilityManagerAndroid, int x, int y);
-    private native boolean nativePopulateAccessibilityNodeInfo(
-        int nativeBrowserAccessibilityManagerAndroid, AccessibilityNodeInfo info, int id);
-    private native boolean nativePopulateAccessibilityEvent(
-        int nativeBrowserAccessibilityManagerAndroid, AccessibilityEvent event, int id,
-        int eventType);
-    private native void nativeClick(int nativeBrowserAccessibilityManagerAndroid, int id);
-    private native void nativeFocus(int nativeBrowserAccessibilityManagerAndroid, int id);
-    private native void nativeBlur(int nativeBrowserAccessibilityManagerAndroid);
-}