#define CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_MANAGER_H_
#include "base/android/jni_android.h"
-#include "base/android/jni_helper.h"
+#include "base/android/jni_weak_ref.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/android/meta_tag_observer.h"
+#include "chrome/browser/bitmap_fetcher.h"
namespace content {
struct FrameNavigateParams;
* Monitors at most one package at a time, and tracks the info for the
* most recent app that was requested. Any work in progress for other apps is
* discarded.
+ *
+ * The procedure for creating a banner spans multiple asynchronous calls across
+ * the JNI boundary, as well as querying a Service to get info about the app.
+ *
+ * 0) A navigation of the main frame is triggered. Upon completion of the load,
+ * the page is parsed for the correct meta tag. If it doesn't exist, abort.
+ *
+ * 1) The AppBannerManager is alerted about the tag's contents, which should
+ * be the Play Store package name. This is sent to the Java side
+ * AppBannerManager.
+ *
+ * 2) The AppBannerManager's ServiceDelegate is asynchronously queried about the
+ * package name.
+ *
+ * 3) At some point, the Java-side AppBannerManager is alerted of the completed
+ * query and is given back data about the requested package, which includes a
+ * URL for the app's icon. This URL is sent to native code for retrieval.
+ *
+ * 4) The process of fetching the icon begins by invoking the BitmapFetcher,
+ * which works asynchonously.
+ *
+ * 5) Once the icon has been downloaded, the icon is sent to the Java-side
+ * AppBannerManager to (finally) create a AppBannerView, assuming that the
+ * app we retrieved the details for is still for the page that requested it.
+ *
+ * Because of the asynchronous nature of this pipeline, it's entirely possible
+ * that a request to show a banner is interrupted by another request. The
+ * Java side manages what happens in these situations, which will usually result
+ * in dropping the old banner request on the floor.
*/
-class AppBannerManager : public MetaTagObserver {
+
+namespace banners {
+
+class AppBannerManager : public chrome::BitmapFetcherDelegate,
+ public MetaTagObserver {
public:
AppBannerManager(JNIEnv* env, jobject obj);
virtual ~AppBannerManager();
// Destroys the AppBannerManager.
void Destroy(JNIEnv* env, jobject obj);
+ // Blocks a banner for |package_name| from appearing on the domain for |url|.
+ void BlockBanner(JNIEnv* env, jobject obj, jstring jurl, jstring jpackage);
+
// Observes a new WebContents, if necessary.
void ReplaceWebContents(JNIEnv* env,
jobject obj,
jobject jweb_contents);
+ // Fetches the icon at the give URL.
+ // Returns |false| if this couldn't be kicked off.
+ bool FetchIcon(JNIEnv* env,
+ jobject obj,
+ jstring jimage_url);
+
// WebContentsObserver overrides.
virtual void DidNavigateMainFrame(
const content::LoadCommittedDetails& details,
const content::FrameNavigateParams& params) OVERRIDE;
+ // BitmapFetcherDelegate overrides.
+ virtual void OnFetchComplete(const GURL url, const SkBitmap* bitmap) OVERRIDE;
+
private:
// Kicks off the process of showing a banner for the package designated by
// |tag_content| on the page at the |expected_url|.
virtual void HandleMetaTagContent(const std::string& tag_content,
const GURL& expected_url) OVERRIDE;
+ // Fetches the icon for an app.
+ scoped_ptr<chrome::BitmapFetcher> fetcher_;
+
+ // AppBannerManager on the Java side.
JavaObjectWeakGlobalRef weak_java_banner_view_manager_;
DISALLOW_COPY_AND_ASSIGN(AppBannerManager);
// Register native methods
bool RegisterAppBannerManager(JNIEnv* env);
+} // namespace banners
+
#endif // CHROME_BROWSER_ANDROID_BANNERS_APP_BANNER_MANAGER_H_