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// 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(
blink::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_
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