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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.webkit;
import android.util.Log;
import android.webkit.WebViewCore.EventHub;
import java.util.ArrayList;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONStringer;
/**
* The default implementation of the SearchBox interface. Implemented
* as a java bridge object and a javascript adapter that is called into
* by the page hosted in the frame.
*/
final class SearchBoxImpl implements SearchBox {
private static final String TAG = "WebKit.SearchBoxImpl";
/* package */ static final String JS_INTERFACE_NAME = "searchBoxJavaBridge_";
/* package */ static final String JS_BRIDGE
= "(function()"
+ "{"
+ "if (!window.chrome) {"
+ " window.chrome = {};"
+ "}"
+ "if (!window.chrome.searchBox) {"
+ " var sb = window.chrome.searchBox = {};"
+ " sb.setSuggestions = function(suggestions) {"
+ " if (window.searchBoxJavaBridge_) {"
+ " window.searchBoxJavaBridge_.setSuggestions(JSON.stringify(suggestions));"
+ " }"
+ " };"
+ " sb.setValue = function(valueArray) { sb.value = valueArray[0]; };"
+ " sb.value = '';"
+ " sb.x = 0;"
+ " sb.y = 0;"
+ " sb.width = 0;"
+ " sb.height = 0;"
+ " sb.selectionStart = 0;"
+ " sb.selectionEnd = 0;"
+ " sb.verbatim = false;"
+ "}"
+ "})();";
private static final String SET_QUERY_SCRIPT
= "if (window.chrome && window.chrome.searchBox) {"
+ " window.chrome.searchBox.setValue(%s);"
+ "}";
private static final String SET_VERBATIM_SCRIPT
= "if (window.chrome && window.chrome.searchBox) {"
+ " window.chrome.searchBox.verbatim = %s;"
+ "}";
private static final String SET_SELECTION_SCRIPT
= "if (window.chrome && window.chrome.searchBox) {"
+ " var f = window.chrome.searchBox;"
+ " f.selectionStart = %d"
+ " f.selectionEnd = %d"
+ "}";
private static final String SET_DIMENSIONS_SCRIPT
= "if (window.chrome && window.chrome.searchBox) { "
+ " var f = window.chrome.searchBox;"
+ " f.x = %d;"
+ " f.y = %d;"
+ " f.width = %d;"
+ " f.height = %d;"
+ "}";
private static final String DISPATCH_EVENT_SCRIPT
= "if (window.chrome && window.chrome.searchBox &&"
+ " window.chrome.searchBox.on%1$s) { window.chrome.searchBox.on%1$s(); }";
private final List<SearchBoxListener> mListeners;
private final WebViewCore mWebViewCore;
private final CallbackProxy mCallbackProxy;
SearchBoxImpl(WebViewCore webViewCore, CallbackProxy callbackProxy) {
mListeners = new ArrayList<SearchBoxListener>();
mWebViewCore = webViewCore;
mCallbackProxy = callbackProxy;
}
@Override
public void setQuery(String query) {
final String formattedQuery = jsonSerialize(query);
if (formattedQuery != null) {
final String js = String.format(SET_QUERY_SCRIPT, formattedQuery);
dispatchJs(js);
}
}
@Override
public void setVerbatim(boolean verbatim) {
final String js = String.format(SET_VERBATIM_SCRIPT, String.valueOf(verbatim));
dispatchJs(js);
}
@Override
public void setSelection(int selectionStart, int selectionEnd) {
final String js = String.format(SET_SELECTION_SCRIPT, selectionStart, selectionEnd);
dispatchJs(js);
}
@Override
public void setDimensions(int x, int y, int width, int height) {
final String js = String.format(SET_DIMENSIONS_SCRIPT, x, y, width, height);
dispatchJs(js);
}
@Override
public void onchange() {
dispatchEvent("change");
}
@Override
public void onsubmit() {
dispatchEvent("submit");
}
@Override
public void onresize() {
dispatchEvent("resize");
}
@Override
public void oncancel() {
dispatchEvent("cancel");
}
private void dispatchEvent(String eventName) {
final String js = String.format(DISPATCH_EVENT_SCRIPT, eventName);
dispatchJs(js);
}
private void dispatchJs(String js) {
mWebViewCore.sendMessage(EventHub.EXECUTE_JS, js);
}
@Override
public void addSearchBoxListener(SearchBoxListener l) {
synchronized (mListeners) {
mListeners.add(l);
}
}
@Override
public void removeSearchBoxListener(SearchBoxListener l) {
synchronized (mListeners) {
mListeners.remove(l);
}
}
// 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) {
JSONStringer stringer = new JSONStringer();
try {
stringer.array().value(query).endArray();
} catch (JSONException e) {
Log.w(TAG, "Error serializing query : " + query);
return null;
}
return stringer.toString();
}
// Called by Javascript through the Java bridge.
public void setSuggestions(String jsonArguments) {
if (jsonArguments == null) {
return;
}
String query = null;
List<String> suggestions = new ArrayList<String>();
try {
JSONObject suggestionsJson = new JSONObject(jsonArguments);
query = suggestionsJson.getString("query");
final JSONArray suggestionsArray = suggestionsJson.getJSONArray("suggestions");
for (int i = 0; i < suggestionsArray.length(); ++i) {
final JSONObject suggestion = suggestionsArray.getJSONObject(i);
final String value = suggestion.getString("value");
if (value != null) {
suggestions.add(value);
}
// We currently ignore the "type" of the suggestion. This isn't
// documented anywhere in the API documents.
// final String type = suggestions.getString("type");
}
} catch (JSONException je) {
Log.w(TAG, "Error parsing json [" + jsonArguments + "], exception = " + je);
return;
}
mCallbackProxy.onSearchboxSuggestionsReceived(query, suggestions);
}
/* package */ void handleSuggestions(String query, List<String> suggestions) {
synchronized (mListeners) {
for (int i = mListeners.size() - 1; i >= 0; i--) {
mListeners.get(i).onSuggestionsReceived(query, suggestions);
}
}
}
}
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