1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_ANDROID_H_
6 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_ANDROID_H_
8 #include "base/android/scoped_java_ref.h"
9 #include "content/browser/accessibility/browser_accessibility_manager.h"
10 #include "content/browser/android/content_view_core_impl.h"
14 namespace aria_strings {
15 extern const char kAriaLivePolite[];
16 extern const char kAriaLiveAssertive[];
19 class CONTENT_EXPORT BrowserAccessibilityManagerAndroid
20 : public BrowserAccessibilityManager {
22 BrowserAccessibilityManagerAndroid(
23 base::android::ScopedJavaLocalRef<jobject> content_view_core,
24 const ui::AXNodeData& src,
25 BrowserAccessibilityDelegate* delegate,
26 BrowserAccessibilityFactory* factory = new BrowserAccessibilityFactory());
28 virtual ~BrowserAccessibilityManagerAndroid();
30 static ui::AXNodeData GetEmptyDocument();
32 void SetContentViewCore(
33 base::android::ScopedJavaLocalRef<jobject> content_view_core);
35 // Implementation of BrowserAccessibilityManager.
36 virtual void NotifyAccessibilityEvent(
37 ui::AXEvent event_type, BrowserAccessibility* node) OVERRIDE;
39 // --------------------------------------------------------------------------
40 // Methods called from Java via JNI
41 // --------------------------------------------------------------------------
44 jint GetRootId(JNIEnv* env, jobject obj);
45 jboolean IsNodeValid(JNIEnv* env, jobject obj, jint id);
46 jint HitTest(JNIEnv* env, jobject obj, jint x, jint y);
48 // Populate Java accessibility data structures with info about a node.
49 jboolean PopulateAccessibilityNodeInfo(
50 JNIEnv* env, jobject obj, jobject info, jint id);
51 jboolean PopulateAccessibilityEvent(
52 JNIEnv* env, jobject obj, jobject event, jint id, jint event_type);
55 void Click(JNIEnv* env, jobject obj, jint id);
56 void Focus(JNIEnv* env, jobject obj, jint id);
57 void Blur(JNIEnv* env, jobject obj);
58 void ScrollToMakeNodeVisible(JNIEnv* env, jobject obj, int id);
61 virtual void NotifyRootChanged() OVERRIDE;
63 virtual bool UseRootScrollOffsetsWhenComputingBounds() OVERRIDE;
66 // This gives BrowserAccessibilityManager::Create access to the class
68 friend class BrowserAccessibilityManager;
70 // A weak reference to the Java BrowserAccessibilityManager object.
71 // This avoids adding another reference to BrowserAccessibilityManager and
72 // preventing garbage collection.
73 // Premature garbage collection is prevented by the long-lived reference in
75 JavaObjectWeakGlobalRef java_ref_;
77 // Searches through the children of start_node to find the nearest
78 // accessibility focus candidate for a touch which has not landed directly on
79 // an accessibility focus candidate.
80 BrowserAccessibility* FuzzyHitTest(
81 int x, int y, BrowserAccessibility* start_node);
83 static void FuzzyHitTestImpl(int x, int y, BrowserAccessibility* start_node,
84 BrowserAccessibility** nearest_candidate, int* min_distance);
86 // Calculates the distance from the point (x, y) to the nearest point on the
88 static int CalculateDistanceSquared(int x, int y, BrowserAccessibility* node);
90 DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerAndroid);
93 bool RegisterBrowserAccessibilityManager(JNIEnv* env);
97 #endif // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_ANDROID_H_