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// Copyright 2008, Google Inc.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// 3. Neither the name of Google Inc. nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef GEARS_BASE_ANDROID_WEBVIEW_MANAGER_H__
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#define GEARS_BASE_ANDROID_WEBVIEW_MANAGER_H__
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#include "gears/base/android/java_global_ref.h"
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#include "gears/base/common/mutex.h"
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#include "gears/base/npapi/module.h"
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// This class manages the association between an NPP instance
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// and the webview corresponding to the page that created the Gears plugin.
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// (See http://code.google.com/android/reference/android/webkit/WebView.html)
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// Several Gears classes (e.g. Desktop, AndroidRadioDataProvider,
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// AndroidGpsLocationProvider) need the webview object so that they
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// can pass it to the Java side. The corresponding Java classes
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// extract a Context object from the webview instance and use it
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// to get access to various system services, such as the TelephonyManager
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// or the LocationManager.
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class WebViewManager {
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// Registers an NPP instance with a webview instance.
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static void RegisterWebView(NPP plugin_instance, jobject web_view);
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// Removes the association between an NPP instance and a webview instance.
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static void UnregisterWebView(NPP plugin_instance);
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// Retrieves the webview associated with the NPP instance that corresponds
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// to the current call context. Note that in order to succeeed, this method
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// must be called from sites that have a call context. This imposes an
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// important restriction: objects that need the webview must attempt to
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// acquire it only from the "main" javascript threads (either the thread
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// where the document JS runner is executed, or a worker thread) and only
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// from a script-invoked method call on a Gears object.
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// Attempting to acquire the webview from anywhere else is an error
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// and will trigger an assertion on debug builds.
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static bool GetWebView(jobject *web_view_out);
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typedef std::map<NPP, JavaGlobalRef<jobject> > WebViewMap;
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static WebViewMap map_;
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static Mutex map_mutex_;
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DISALLOW_EVIL_CONSTRUCTORS(WebViewManager);
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#endif // GEARS_BASE_ANDROID_WEBVIEW_MANAGER_H__