/*
* Copyright 2000-2014 Vaadin Ltd.
*
* 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 com.vaadin.client;
import com.google.gwt.user.client.ui.RootPanel;
import com.vaadin.shared.VBrowserDetails;
/**
* Class used to query information about web browser.
*
* Browser details are detected only once and those are stored in this singleton
* class.
*
*/
public class BrowserInfo {
private static final String BROWSER_OPERA = "op";
private static final String BROWSER_IE = "ie";
private static final String BROWSER_FIREFOX = "ff";
private static final String BROWSER_SAFARI = "sa";
public static final String ENGINE_GECKO = "gecko";
public static final String ENGINE_WEBKIT = "webkit";
public static final String ENGINE_PRESTO = "presto";
public static final String ENGINE_TRIDENT = "trident";
private static final String OS_WINDOWS = "win";
private static final String OS_LINUX = "lin";
private static final String OS_MACOSX = "mac";
private static final String OS_ANDROID = "android";
private static final String OS_IOS = "ios";
// Common CSS class for all touch devices
private static final String UI_TOUCH = "touch";
private static BrowserInfo instance;
private static String cssClass = null;
static {
// Add browser dependent v-* classnames to body to help css hacks
String browserClassnames = get().getCSSClass();
RootPanel.get().addStyleName(browserClassnames);
}
/**
* Singleton method to get BrowserInfo object.
*
* @return instance of BrowserInfo object
*/
public static BrowserInfo get() {
if (instance == null) {
instance = new BrowserInfo();
}
return instance;
}
private VBrowserDetails browserDetails;
private boolean touchDevice;
private BrowserInfo() {
browserDetails = new VBrowserDetails(getBrowserString());
if (browserDetails.isIE()) {
// Use document mode instead user agent to accurately detect how we
// are rendering
int documentMode = getIEDocumentMode();
if (documentMode != -1) {
browserDetails.setIEMode(documentMode);
}
}
if (browserDetails.isChrome()) {
touchDevice = detectChromeTouchDevice();
} else if (browserDetails.isIE()) {
touchDevice = detectIETouchDevice();
} else {
touchDevice = detectTouchDevice();
}
}
private native boolean detectTouchDevice()
/*-{
try { document.createEvent("TouchEvent");return true;} catch(e){return false;};
}-*/;
private native boolean detectChromeTouchDevice()
/*-{
return ("ontouchstart" in window);
}-*/;
private native boolean detectIETouchDevice()
/*-{
return !!navigator.msMaxTouchPoints;
}-*/;
private native int getIEDocumentMode()
/*-{
var mode = $wnd.document.documentMode;
if (!mode)
return -1;
return mode;
}-*/;
/**
* Returns a string representing the browser in use, for use in CSS
* classnames. The classnames will be space separated abbreviations,
* optionally with a version appended.
*
* Abbreviations: Firefox: ff Internet Explorer: ie Safari: sa Opera: op
*
* Browsers that CSS-wise behave like each other will get the same
* abbreviation (this usually depends on the rendering engine).
*
* This is quite simple at the moment, more heuristics will be added when
* needed.
*
* Examples: Internet Explorer 6: ".v-ie .v-ie6 .v-ie60", Firefox 3.0.4:
* ".v-ff .v-ff3 .v-ff30", Opera 9.60: ".v-op .v-op9 .v-op960", Opera 10.10:
* ".v-op .v-op10 .v-op1010"
*
* @return
*/
public String getCSSClass() {
String prefix = "v-";
if (cssClass == null) {
String browserIdentifier = "";
String majorVersionClass = "";
String minorVersionClass = "";
String browserEngineClass = "";
if (browserDetails.isFirefox()) {
browserIdentifier = BROWSER_FIREFOX;
majorVersionClass = browserIdentifier
+ getBrowserMajorVersion();
minorVersionClass = majorVersionClass
+ browserDetails.getBrowserMinorVersion();
browserEngineClass = ENGINE_GECKO;
} else if (browserDetails.isChrome()) {
// TODO update when Chrome is more stable
browserIdentifier = BROWSER_SAFARI;
majorVersionClass = "ch";
browserEngineClass = ENGINE_WEBKIT;
} else if (browserDetails.isSafari()) {
browserIdentifier = BROWSER_SAFARI;
majorVersionClass = browserIdentifier
+ getBrowserMajorVersion();
minorVersionClass = majorVersionClass
+ browserDetails.getBrowserMinorVersion();
browserEngineClass = ENGINE_WEBKIT;
} else if (browserDetails.isIE()) {
browserIdentifier = BROWSER_IE;
majorVersionClass = browserIdentifier
+ getBrowserMajorVersion();
minorVersionClass = majorVersionClass
+ browserDetails.getBrowserMinorVersion();
browserEngineClass = ENGINE_TRIDENT;
} else if (browserDetails.isOpera()) {
browserIdentifier = BROWSER_OPERA;
majorVersionClass = browserIdentifier
+ getBrowserMajorVersion();
minorVersionClass = majorVersionClass
+ browserDetails.getBrowserMinorVersion();
browserEngineClass = ENGINE_PRESTO;
}
cssClass = prefix + browserIdentifier;
if (!"".equals(majorVersionClass)) {
cssClass = cssClass + " " + prefix + majorVersionClass;
}
if (!"".equals(minorVersionClass)) {
cssClass = cssClass + " " + prefix + minorVersionClass;
}
if (!"".equals(browserEngineClass)) {
cssClass = cssClass + " " + prefix + browserEngineClass;
}
String osClass = getOperatingSystemClass();
if (osClass != null) {
cssClass = cssClass + " " + osClass;
}
if (isTouchDevice()) {
cssClass = cssClass + " " + prefix + UI_TOUCH;
}
}
return cssClass;
}
private String getOperatingSystemClass() {
String prefix = "v-";
if (browserDetails.isAndroid()) {
return prefix + OS_ANDROID;
} else if (browserDetails.isIOS()) {
String iosClass = prefix + OS_IOS;
return iosClass + " " + iosClass + getOperatingSystemMajorVersion();
} else if (browserDetails.isWindows()) {
return prefix + OS_WINDOWS;
} else if (browserDetails.isLinux()) {
return prefix + OS_LINUX;
} else if (browserDetails.isMacOSX()) {
return prefix + OS_MACOSX;
}
// Unknown OS
return null;
}
public boolean isIE() {
return browserDetails.isIE();
}
public boolean isFirefox() {
return browserDetails.isFirefox();
}
public boolean isSafari() {
return browserDetails.isSafari();
}
public boolean isIE8() {
return isIE() && getBrowserMajorVersion() == 8;
}
public boolean isIE9() {
return isIE() && getBrowserMajorVersion() == 9;
}
public boolean isIE10() {
return isIE() && getBrowserMajorVersion() == 10;
}
public boolean isChrome() {
return browserDetails.isChrome();
}
public boolean isGecko() {
return browserDetails.isGecko();
}
public boolean isWebkit() {
return browserDetails.isWebKit();
}
/**
* Returns the Gecko version if the browser is Gecko based. The Gecko
* version for Firefox 2 is 1.8 and 1.9 for Firefox 3.
*
* @return The Gecko version or -1 if the browser is not Gecko based
*/
public float getGeckoVersion() {
if (!browserDetails.isGecko()) {
return -1;
}
return browserDetails.getBrowserEngineVersion();
}
/**
* Returns the WebKit version if the browser is WebKit based. The WebKit
* version returned is the major version e.g., 523.
*
* @return The WebKit version or -1 if the browser is not WebKit based
*/
public float getWebkitVersion() {
if (!browserDetails.isWebKit()) {
return -1;
}
return browserDetails.getBrowserEngineVersion();
}
public float getIEVersion() {
if (!browserDetails.isIE()) {
return -1;
}
return getBrowserMajorVersion();
}
public float getOperaVersion() {
if (!browserDetails.isOpera()) {
return -1;
}
return getBrowserMajorVersion();
}
public boolean isOpera() {
return browserDetails.isOpera();
}
public boolean isOpera10() {
return browserDetails.isOpera() && getBrowserMajorVersion() == 10;
}
public boolean isOpera11() {
return browserDetails.isOpera() && getBrowserMajorVersion() == 11;
}
public native static String getBrowserString()
/*-{
return $wnd.navigator.userAgent;
}-*/;
public native int getScreenWidth()
/*-{
return $wnd.screen.width;
}-*/;
public native int getScreenHeight()
/*-{
return $wnd.screen.height;
}-*/;
/**
* @return true if the browser runs on a touch based device.
*/
public boolean isTouchDevice() {
return touchDevice;
}
/**
* Indicates whether the browser might require juggling to properly update
* sizes inside elements with overflow: auto.
*
* @return <code>true</code> if the browser requires the workaround,
* otherwise <code>false</code>
*/
public boolean requiresOverflowAutoFix() {
return (getWebkitVersion() > 0 || getOperaVersion() >= 11
|| getIEVersion() >= 10 || isFirefox())
&& Util.getNativeScrollbarSize() > 0;
}
/**
* Indicates whether the browser might require juggling to properly update
* sizes inside elements with overflow: auto when adjusting absolutely
* positioned elements.
* <p>
* See https://bugs.webkit.org/show_bug.cgi?id=123958 and
* http://code.google.com/p/chromium/issues/detail?id=316549
*
* @since 7.1.8
* @return <code>true</code> if the browser requires the workaround,
* otherwise <code>false</code>
*/
public boolean requiresPositionAbsoluteOverflowAutoFix() {
return (getWebkitVersion() > 0) && Util.getNativeScrollbarSize() > 0;
}
/**
* Checks if the browser is run on iOS
*
* @return true if the browser is run on iOS, false otherwise
*/
public boolean isIOS() {
return browserDetails.isIOS();
}
/**
* Checks if the browser is run on iOS 6.
*
* @since 7.1.1
* @return true if the browser is run on iOS 6, false otherwise
*/
public boolean isIOS6() {
return isIOS() && getOperatingSystemMajorVersion() == 6;
}
/**
* Checks if the browser is run on Android
*
* @return true if the browser is run on Android, false otherwise
*/
public boolean isAndroid() {
return browserDetails.isAndroid();
}
/**
* Checks if the browser is capable of handling scrolling natively or if a
* touch scroll helper is needed for scrolling.
*
* @return true if browser needs a touch scroll helper, false if the browser
* can handle scrolling natively
*/
public boolean requiresTouchScrollDelegate() {
if (!isTouchDevice()) {
return false;
}
// TODO Should test other Android browsers, especially Chrome
if (isAndroid() && isWebkit() && getWebkitVersion() >= 534) {
return false;
}
// iOS 6+ Safari supports native scrolling; iOS 5 suffers from #8792
// TODO Should test other iOS browsers
if (isIOS() && isWebkit() && getOperatingSystemMajorVersion() >= 6) {
return false;
}
return true;
}
/**
* Tests if this is an Android devices with a broken scrollTop
* implementation
*
* @return true if scrollTop cannot be trusted on this device, false
* otherwise
*/
public boolean isAndroidWithBrokenScrollTop() {
return isAndroid()
&& (getOperatingSystemMajorVersion() == 3 || getOperatingSystemMajorVersion() == 4);
}
public boolean isAndroid23() {
return isAndroid() && getOperatingSystemMajorVersion() == 2
&& getOperatingSystemMinorVersion() == 3;
}
private int getOperatingSystemMajorVersion() {
return browserDetails.getOperatingSystemMajorVersion();
}
private int getOperatingSystemMinorVersion() {
return browserDetails.getOperatingSystemMinorVersion();
}
/**
* Returns the browser major version e.g., 3 for Firefox 3.5, 4 for Chrome
* 4, 8 for Internet Explorer 8.
* <p>
* Note that Internet Explorer 8 and newer will return the document mode so
* IE8 rendering as IE7 will return 7.
* </p>
*
* @return The major version of the browser.
*/
public int getBrowserMajorVersion() {
return browserDetails.getBrowserMajorVersion();
}
/**
* Returns the browser minor version e.g., 5 for Firefox 3.5.
*
* @see #getBrowserMajorVersion()
*
* @return The minor version of the browser, or -1 if not known/parsed.
*/
public int getBrowserMinorVersion() {
return browserDetails.getBrowserMinorVersion();
}
/**
* Checks if the browser version is newer or equal to the given major+minor
* version.
*
* @param majorVersion
* The major version to check for
* @param minorVersion
* The minor version to check for
* @return true if the browser version is newer or equal to the given
* version
*/
public boolean isBrowserVersionNewerOrEqual(int majorVersion,
int minorVersion) {
if (getBrowserMajorVersion() == majorVersion) {
// Same major
return (getBrowserMinorVersion() >= minorVersion);
}
// Older or newer major
return (getBrowserMajorVersion() > majorVersion);
}
}