| /* |
| * Copyright 2010 Google Inc. |
| * |
| * 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 elemental.js; |
| |
| import com.google.gwt.core.client.GWT; |
| |
| import elemental.client.Browser; |
| import elemental.html.Navigator; |
| import elemental.js.dom.JsDocument; |
| import elemental.js.html.JsWindow; |
| |
| /** |
| * JavaScript native implementation of {@link elemental.client.Browser}. |
| */ |
| @Deprecated |
| public class JsBrowser { |
| /** |
| * A {@link Browser.Info} implementation for when the browser is known to be |
| * Gecko at compile time. |
| */ |
| @SuppressWarnings("unused") |
| private static class InfoWhenKnownGecko extends InfoWhenUnknown { |
| @Override |
| public boolean isGecko() { |
| return true; |
| } |
| |
| @Override |
| public boolean isSupported() { |
| return true; |
| } |
| |
| @Override |
| public boolean isWebKit() { |
| return false; |
| } |
| } |
| |
| /** |
| * A {@link Browser.Info} implementation for when the browser is known to be |
| * Unsupported at compile time. |
| */ |
| @SuppressWarnings("unused") |
| private static class InfoWhenKnownUnsupported extends InfoWhenUnknown { |
| @Override |
| public boolean isGecko() { |
| return false; |
| } |
| |
| @Override |
| public boolean isSupported() { |
| return false; |
| } |
| |
| @Override |
| public boolean isWebKit() { |
| return false; |
| } |
| } |
| |
| /** |
| * A {@link Browser.Info} implementation for when the browser is known to be |
| * WebKit at compile time. |
| */ |
| @Deprecated |
| @SuppressWarnings("unused") |
| private static class InfoWhenKnownWebKit extends InfoWhenUnknown { |
| @Override |
| public boolean isGecko() { |
| return false; |
| } |
| |
| @Override |
| public boolean isSupported() { |
| return true; |
| } |
| |
| @Override |
| public boolean isWebKit() { |
| return true; |
| } |
| } |
| |
| /** |
| * A {@link Browser.Info} implementation for when the browser is not known |
| * until runtime. |
| * |
| * <p> |
| * Careful Captain! All those static fields are intentional. In order to |
| * ensure good dead stripping of the entire InfoWhen class hierarchy, the |
| * instance returned by {@link JsBrowser#getInfo()} must not be aliased, so it |
| * instead returns a fly-weight instance referencing static fields. |
| * </p> |
| */ |
| private static class InfoWhenUnknown implements Browser.Info { |
| private native static double getGeckoVersion(String userAgent) /*-{ |
| var r = / rv\:(\d+\.\d+)/.exec(userAgent); |
| return r ? parseFloat(r[1]) : 0.0; |
| }-*/; |
| |
| private native static String getProduct(Navigator nav) /*-{ |
| return nav.product; |
| }-*/; |
| |
| private native static double getWebKitVersion(String userAgent) /*-{ |
| var r = /WebKit\/(\d+\.\d+)/.exec(userAgent); |
| return r ? parseFloat(r[1]) : 0.0; |
| }-*/; |
| |
| private static boolean browserDetected; |
| |
| private static boolean platformDetected; |
| |
| private static boolean isWebKit; |
| |
| private static boolean isGecko; |
| |
| private static boolean isMac; |
| |
| private static boolean isWindows; |
| |
| private static boolean isLinux; |
| |
| private void ensurePlatformDetected() { |
| if (!platformDetected) { |
| platformDetected = true; |
| final String userAgent = getWindow().getNavigator().getUserAgent(); |
| isWindows = userAgent.indexOf("Win") >= 0; |
| if (isWindows) { |
| return; |
| } |
| |
| isMac = userAgent.indexOf("Mac") >= 0; |
| if (isMac) { |
| return; |
| } |
| |
| isLinux = userAgent.indexOf("Linux") >= 0; |
| } |
| } |
| |
| private void ensureBrowserDetected() { |
| if (!browserDetected) { |
| browserDetected = true; |
| final Navigator nav = getWindow().getNavigator(); |
| final String ua = nav.getUserAgent(); |
| boolean isWebKitBased = ua.indexOf("WebKit") >= 0; |
| if (isWebKitBased) { |
| isWebKit = getWebKitVersion(ua) >= SUPPORTED_WEBKIT_VERSION; |
| return; |
| } |
| |
| assert !isWebKitBased; |
| isGecko = getProduct(nav).equals("Gecko") && getGeckoVersion(ua) >= SUPPORTED_GECKO_VERSION; |
| } |
| } |
| |
| @Override |
| public boolean isGecko() { |
| ensureBrowserDetected(); |
| return isGecko; |
| } |
| |
| @Override |
| public boolean isSupported() { |
| ensureBrowserDetected(); |
| return isGecko || isWebKit; |
| } |
| |
| @Override |
| public boolean isWebKit() { |
| ensureBrowserDetected(); |
| return isWebKit; |
| } |
| |
| @Override |
| public boolean isLinux() { |
| ensurePlatformDetected(); |
| return isLinux; |
| } |
| |
| @Override |
| public boolean isMac() { |
| ensurePlatformDetected(); |
| return isMac; |
| } |
| |
| public boolean isWindows() { |
| ensurePlatformDetected(); |
| return isWindows; |
| } |
| } |
| |
| /** |
| * The minimum version of WebKit that is supported. |
| * |
| * This equates to >= Safari 5.0.2 |
| */ |
| private static final double SUPPORTED_WEBKIT_VERSION = 533.18; |
| |
| /** |
| * The minimum version of Gecko that is supported. |
| * |
| * This equates to >= Firefox 4.0 |
| */ |
| private static final double SUPPORTED_GECKO_VERSION = 2.0; |
| |
| /** |
| * Gets the document within which this script is running. |
| */ |
| public static native JsDocument getDocument() /*-{ |
| return $doc; |
| }-*/; |
| |
| public static Browser.Info getInfo() { |
| return GWT.create(InfoWhenUnknown.class); |
| } |
| |
| /** |
| * Gets the window within which this script is running. |
| */ |
| public static native JsWindow getWindow() /*-{ |
| return $wnd; |
| }-*/; |
| |
| // Non-instantiable. |
| private JsBrowser() { |
| } |
| } |