/*
* Copyright (C) 2008 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.graphics.Bitmap;
import android.os.Message;
import android.view.View;
public class WebChromeClient {
/**
* Tell the host application the current progress of loading a page.
* @param view The WebView that initiated the callback.
* @param newProgress Current page loading progress, represented by
* an integer between 0 and 100.
*/
public void onProgressChanged(WebView view, int newProgress) {}
/**
* Notify the host application of a change in the document title.
* @param view The WebView that initiated the callback.
* @param title A String containing the new title of the document.
*/
public void onReceivedTitle(WebView view, String title) {}
/**
* Notify the host application of a new favicon for the current page.
* @param view The WebView that initiated the callback.
* @param icon A Bitmap containing the favicon for the current page.
*/
public void onReceivedIcon(WebView view, Bitmap icon) {}
/**
* Notify the host application of the url for an apple-touch-icon.
* @param view The WebView that initiated the callback.
* @param url The icon url.
* @param precomposed True if the url is for a precomposed touch icon.
*/
public void onReceivedTouchIconUrl(WebView view, String url,
boolean precomposed) {}
/**
* A callback interface used by the host application to notify
* the current page that its custom view has been dismissed.
*/
public interface CustomViewCallback {
/**
* Invoked when the host application dismisses the
* custom view.
*/
public void onCustomViewHidden();
}
/**
* Notify the host application that the current page would
* like to show a custom View.
* @param view is the View object to be shown.
* @param callback is the callback to be invoked if and when the view
* is dismissed.
*/
public void onShowCustomView(View view, CustomViewCallback callback) {};
/**
* Notify the host application that the current page would
* like to hide its custom view.
*/
public void onHideCustomView() {}
/**
* Request the host application to create a new Webview. The host
* application should handle placement of the new WebView in the view
* system. The default behavior returns null.
* @param view The WebView that initiated the callback.
* @param dialog True if the new window is meant to be a small dialog
* window.
* @param userGesture True if the request was initiated by a user gesture
* such as clicking a link.
* @param resultMsg The message to send when done creating a new WebView.
* Set the new WebView through resultMsg.obj which is
* WebView.WebViewTransport() and then call
* resultMsg.sendToTarget();
* @return Similar to javscript dialogs, this method should return true if
* the client is going to handle creating a new WebView. Note that
* the WebView will halt processing if this method returns true so
* make sure to call resultMsg.sendToTarget(). It is undefined
* behavior to call resultMsg.sendToTarget() after returning false
* from this method.
*/
public boolean onCreateWindow(WebView view, boolean dialog,
boolean userGesture, Message resultMsg) {
return false;
}
/**
* Request display and focus for this WebView. This may happen due to
* another WebView opening a link in this WebView and requesting that this
* WebView be displayed.
* @param view The WebView that needs to be focused.
*/
public void onRequestFocus(WebView view) {}
/**
* Notify the host application to close the given WebView and remove it
* from the view system if necessary. At this point, WebCore has stopped
* any loading in this window and has removed any cross-scripting ability
* in javascript.
* @param window The WebView that needs to be closed.
*/
public void onCloseWindow(WebView window) {}
/**
* Tell the client to display a javascript alert dialog. If the client
* returns true, WebView will assume that the client will handle the
* dialog. If the client returns false, it will continue execution.
* @param view The WebView that initiated the callback.
* @param url The url of the page requesting the dialog.
* @param message Message to be displayed in the window.
* @param result A JsResult to confirm that the user hit enter.
* @return boolean Whether the client will handle the alert dialog.
*/
public boolean onJsAlert(WebView view, String url, String message,
JsResult result) {
return false;
}
/**
* Tell the client to display a confirm dialog to the user. If the client
* returns true, WebView will assume that the client will handle the
* confirm dialog and call the appropriate JsResult method. If the
* client returns false, a default value of false will be returned to
* javascript. The default behavior is to return false.
* @param view The WebView that initiated the callback.
* @param url The url of the page requesting the dialog.
* @param message Message to be displayed in the window.
* @param result A JsResult used to send the user's response to
* javascript.
* @return boolean Whether the client will handle the confirm dialog.
*/
public boolean onJsConfirm(WebView view, String url, String message,
JsResult result) {
return false;
}
/**
* Tell the client to display a prompt dialog to the user. If the client
* returns true, WebView will assume that the client will handle the
* prompt dialog and call the appropriate JsPromptResult method. If the
* client returns false, a default value of false will be returned to to
* javascript. The default behavior is to return false.
* @param view The WebView that initiated the callback.
* @param url The url of the page requesting the dialog.
* @param message Message to be displayed in the window.
* @param defaultValue The default value displayed in the prompt dialog.
* @param result A JsPromptResult used to send the user's reponse to
* javascript.
* @return boolean Whether the client will handle the prompt dialog.
*/
public boolean onJsPrompt(WebView view, String url, String message,
String defaultValue, JsPromptResult result) {
return false;
}
/**
* Tell the client to display a dialog to confirm navigation away from the
* current page. This is the result of the onbeforeunload javascript event.
* If the client returns true, WebView will assume that the client will
* handle the confirm dialog and call the appropriate JsResult method. If
* the client returns false, a default value of true will be returned to
* javascript to accept navigation away from the current page. The default
* behavior is to return false. Setting the JsResult to true will navigate
* away from the current page, false will cancel the navigation.
* @param view The WebView that initiated the callback.
* @param url The url of the page requesting the dialog.
* @param message Message to be displayed in the window.
* @param result A JsResult used to send the user's response to
* javascript.
* @return boolean Whether the client will handle the confirm dialog.
*/
public boolean onJsBeforeUnload(WebView view, String url, String message,
JsResult result) {
return false;
}
/**
* Tell the client that the database quota for the origin has been exceeded.
* @param url The URL that triggered the notification
* @param databaseIdentifier The identifier of the database that caused the
* quota overflow.
* @param currentQuota The current quota for the origin.
* @param estimatedSize The estimated size of the database.
* @param totalUsedQuota is the sum of all origins' quota.
* @param quotaUpdater A callback to inform the WebCore thread that a new
* quota is available. This callback must always be executed at some
* point to ensure that the sleeping WebCore thread is woken up.
*/
public void onExceededDatabaseQuota(String url, String databaseIdentifier,
long currentQuota, long estimatedSize, long totalUsedQuota,
WebStorage.QuotaUpdater quotaUpdater) {
// This default implementation passes the current quota back to WebCore.
// WebCore will interpret this that new quota was declined.
quotaUpdater.updateQuota(currentQuota);
}
/**
* Tell the client that the Application Cache has exceeded its max size.
* @param spaceNeeded is the amount of disk space that would be needed
* in order for the last appcache operation to succeed.
* @param totalUsedQuota is the sum of all origins' quota.
* @param quotaUpdater A callback to inform the WebCore thread that a new
* app cache size is available. This callback must always be executed at
* some point to ensure that the sleeping WebCore thread is woken up.
*/
public void onReachedMaxAppCacheSize(long spaceNeeded, long totalUsedQuota,
WebStorage.QuotaUpdater quotaUpdater) {
quotaUpdater.updateQuota(0);
}
/**
* Instructs the client to show a prompt to ask the user to set the
* Geolocation permission state for the specified origin.
*/
public void onGeolocationPermissionsShowPrompt(String origin,
GeolocationPermissions.Callback callback) {}
/**
* Instructs the client to hide the Geolocation permissions prompt.
*/
public void onGeolocationPermissionsHidePrompt() {}
/**
* Tell the client that a JavaScript execution timeout has occured. And the
* client may decide whether or not to interrupt the execution. If the
* client returns true, the JavaScript will be interrupted. If the client
* returns false, the execution will continue. Note that in the case of
* continuing execution, the timeout counter will be reset, and the callback
* will continue to occur if the script does not finish at the next check
* point.
* @return boolean Whether the JavaScript execution should be interrupted.
*/
public boolean onJsTimeout() {
return true;
}
/**
* Add a JavaScript error message to the console. Clients should override
* this to process the log message as they see fit.
* @param message The error message to report.
* @param lineNumber The line number of the error.
* @param sourceID The name of the source file that caused the error.
*/
public void addMessageToConsole(String message, int lineNumber, String sourceID) {}
/**
* Ask the host application for an icon to represent a <video> element.
* This icon will be used if the Web page did not specify a poster attribute.
*
* @return Bitmap The icon or null if no such icon is available.
*/
public Bitmap getDefaultVideoPoster() {
return null;
}
/**
* Ask the host application for a custom progress view to show while
* a <video> is loading.
*
* @return View The progress view.
*/
public View getVideoLoadingProgressView() {
return null;
}
/** Obtains a list of all visited history items, used for link coloring
*/
public void getVisitedHistory(ValueCallback<String[]> callback) {
}
}