| // Copyright 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. |
| |
| #ifndef CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_ANDROID_H_ |
| #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_ANDROID_H_ |
| |
| #include "base/android/scoped_java_ref.h" |
| #include "content/browser/accessibility/browser_accessibility_manager.h" |
| #include "content/browser/android/content_view_core_impl.h" |
| |
| namespace content { |
| |
| namespace aria_strings { |
| extern const char kAriaLivePolite[]; |
| extern const char kAriaLiveAssertive[]; |
| } |
| |
| class CONTENT_EXPORT BrowserAccessibilityManagerAndroid |
| : public BrowserAccessibilityManager { |
| public: |
| BrowserAccessibilityManagerAndroid( |
| base::android::ScopedJavaLocalRef<jobject> content_view_core, |
| const AccessibilityNodeData& src, |
| BrowserAccessibilityDelegate* delegate, |
| BrowserAccessibilityFactory* factory = new BrowserAccessibilityFactory()); |
| |
| virtual ~BrowserAccessibilityManagerAndroid(); |
| |
| static AccessibilityNodeData GetEmptyDocument(); |
| |
| void SetContentViewCore( |
| base::android::ScopedJavaLocalRef<jobject> content_view_core); |
| |
| // Implementation of BrowserAccessibilityManager. |
| virtual void NotifyAccessibilityEvent( |
| WebKit::WebAXEvent event_type, BrowserAccessibility* node) OVERRIDE; |
| |
| // -------------------------------------------------------------------------- |
| // Methods called from Java via JNI |
| // -------------------------------------------------------------------------- |
| |
| // Tree methods. |
| jint GetRootId(JNIEnv* env, jobject obj); |
| jint HitTest(JNIEnv* env, jobject obj, jint x, jint y); |
| |
| // Populate Java accessibility data structures with info about a node. |
| jboolean PopulateAccessibilityNodeInfo( |
| JNIEnv* env, jobject obj, jobject info, jint id); |
| jboolean PopulateAccessibilityEvent( |
| JNIEnv* env, jobject obj, jobject event, jint id, jint event_type); |
| |
| // Perform actions. |
| void Click(JNIEnv* env, jobject obj, jint id); |
| void Focus(JNIEnv* env, jobject obj, jint id); |
| void Blur(JNIEnv* env, jobject obj); |
| |
| protected: |
| virtual void NotifyRootChanged() OVERRIDE; |
| |
| virtual bool UseRootScrollOffsetsWhenComputingBounds() OVERRIDE; |
| |
| private: |
| // This gives BrowserAccessibilityManager::Create access to the class |
| // constructor. |
| friend class BrowserAccessibilityManager; |
| |
| // A weak reference to the Java BrowserAccessibilityManager object. |
| // This avoids adding another reference to BrowserAccessibilityManager and |
| // preventing garbage collection. |
| // Premature garbage collection is prevented by the long-lived reference in |
| // ContentViewCore. |
| JavaObjectWeakGlobalRef java_ref_; |
| |
| // Searches through the children of start_node to find the nearest |
| // accessibility focus candidate for a touch which has not landed directly on |
| // an accessibility focus candidate. |
| BrowserAccessibility* FuzzyHitTest( |
| int x, int y, BrowserAccessibility* start_node); |
| |
| static void FuzzyHitTestImpl(int x, int y, BrowserAccessibility* start_node, |
| BrowserAccessibility** nearest_candidate, int* min_distance); |
| |
| // Calculates the distance from the point (x, y) to the nearest point on the |
| // edge of |node|. |
| static int CalculateDistanceSquared(int x, int y, BrowserAccessibility* node); |
| |
| DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerAndroid); |
| }; |
| |
| bool RegisterBrowserAccessibilityManager(JNIEnv* env); |
| |
| } |
| |
| #endif // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_ANDROID_H_ |