From bdaa1aafd590aa88e16cee166f8e78404d8023a4 Mon Sep 17 00:00:00 2001
From: Mathew Inwood <mathewi@google.com>
Date: Mon, 4 Jul 2011 15:15:27 +0100
Subject: SearchBox API to determine if it's supported by the current page.

Change-Id: I0119243ed0e19e237c1f51de887af5c954f96693
---
 core/java/android/webkit/CallbackProxy.java | 16 +++++++++++++++-
 core/java/android/webkit/SearchBox.java     |  9 +++++++++
 core/java/android/webkit/SearchBoxImpl.java | 29 +++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/core/java/android/webkit/CallbackProxy.java b/core/java/android/webkit/CallbackProxy.java
index f7d55f6f00af..0294e3f81600 100644
--- a/core/java/android/webkit/CallbackProxy.java
+++ b/core/java/android/webkit/CallbackProxy.java
@@ -119,6 +119,7 @@ class CallbackProxy extends Handler {
     private static final int NOTIFY_SEARCHBOX_LISTENERS          = 139;
     private static final int AUTO_LOGIN                          = 140;
     private static final int CLIENT_CERT_REQUEST                 = 141;
+    private static final int SEARCHBOX_IS_SUPPORTED_CALLBACK     = 142;
 
     // Message triggered by the client to resume execution
     private static final int NOTIFY                              = 200;
@@ -796,13 +797,14 @@ class CallbackProxy extends Handler {
                     mWebChromeClient.setInstallableWebApp();
                 }
                 break;
-            case NOTIFY_SEARCHBOX_LISTENERS:
+            case NOTIFY_SEARCHBOX_LISTENERS: {
                 SearchBoxImpl searchBox = (SearchBoxImpl) mWebView.getSearchBox();
 
                 @SuppressWarnings("unchecked")
                 List<String> suggestions = (List<String>) msg.obj;
                 searchBox.handleSuggestions(msg.getData().getString("query"), suggestions);
                 break;
+            }
             case AUTO_LOGIN: {
                 if (mWebViewClient != null) {
                     String realm = msg.getData().getString("realm");
@@ -813,6 +815,12 @@ class CallbackProxy extends Handler {
                 }
                 break;
             }
+            case SEARCHBOX_IS_SUPPORTED_CALLBACK: {
+                SearchBoxImpl searchBox = (SearchBoxImpl) mWebView.getSearchBox();
+                Boolean supported = (Boolean) msg.obj;
+                searchBox.handleIsSupportedCallback(supported);
+                break;
+            }
         }
     }
 
@@ -1627,4 +1635,10 @@ class CallbackProxy extends Handler {
 
         sendMessage(msg);
     }
+
+    void onIsSupportedCallback(boolean isSupported) {
+        Message msg = obtainMessage(SEARCHBOX_IS_SUPPORTED_CALLBACK);
+        msg.obj = new Boolean(isSupported);
+        sendMessage(msg);
+    }
 }
diff --git a/core/java/android/webkit/SearchBox.java b/core/java/android/webkit/SearchBox.java
index 57c7b035efad..5075302fb936 100644
--- a/core/java/android/webkit/SearchBox.java
+++ b/core/java/android/webkit/SearchBox.java
@@ -82,6 +82,11 @@ public interface SearchBox {
     void addSearchBoxListener(SearchBoxListener l);
     void removeSearchBoxListener(SearchBoxListener l);
 
+    /**
+     * Indicates if the searchbox API is supported in the current page.
+     */
+    void isSupported(IsSupportedCallback callback);
+
     /**
      * Listeners (if any) will be called on the thread that created the
      * webview.
@@ -89,4 +94,8 @@ public interface SearchBox {
     interface SearchBoxListener {
         void onSuggestionsReceived(String query, List<String> suggestions);
     }
+
+    interface IsSupportedCallback {
+        void searchBoxIsSupported(boolean supported);
+    }
 }
diff --git a/core/java/android/webkit/SearchBoxImpl.java b/core/java/android/webkit/SearchBoxImpl.java
index 480f5d7a5b44..61fb2ce9f160 100644
--- a/core/java/android/webkit/SearchBoxImpl.java
+++ b/core/java/android/webkit/SearchBoxImpl.java
@@ -92,9 +92,19 @@ final class SearchBoxImpl implements SearchBox {
             = "if (window.chrome && window.chrome.searchBox &&"
             + "  window.chrome.searchBox.on%1$s) { window.chrome.searchBox.on%1$s(); }";
 
+    private static final String IS_SUPPORTED_SCRIPT
+            = "if (window.searchBoxJavaBridge_) {"
+            + "  if (window.chrome && window.chrome.searchBox && "
+            + "  window.chrome.searchBox.onsubmit) {"
+            + "    window.searchBoxJavaBridge_.isSupportedCallback(true);"
+            + "  } else {"
+            + "    window.searchBoxJavaBridge_.isSupportedCallback(false);"
+            + "  }}";
+
     private final List<SearchBoxListener> mListeners;
     private final WebViewCore mWebViewCore;
     private final CallbackProxy mCallbackProxy;
+    private IsSupportedCallback mSupportedCallback;
 
     SearchBoxImpl(WebViewCore webViewCore, CallbackProxy callbackProxy) {
         mListeners = new ArrayList<SearchBoxListener>();
@@ -173,6 +183,25 @@ final class SearchBoxImpl implements SearchBox {
         }
     }
 
+    @Override
+    public void isSupported(IsSupportedCallback callback) {
+        mSupportedCallback = callback;
+        dispatchJs(IS_SUPPORTED_SCRIPT);
+    }
+
+    // Called by Javascript through the Java bridge.
+    public void isSupportedCallback(boolean isSupported) {
+        mCallbackProxy.onIsSupportedCallback(isSupported);
+    }
+
+    public void handleIsSupportedCallback(boolean isSupported) {
+        IsSupportedCallback callback = mSupportedCallback;
+        mSupportedCallback = null;
+        if (callback != null) {
+            callback.searchBoxIsSupported(isSupported);
+        }
+    }
+
     // This is used as a hackish alternative to javascript escaping.
     // There appears to be no such functionality in the core framework.
     private String jsonSerialize(String query) {
-- 
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