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- /*
- @VaadinApache2LicenseForJavaFiles@
- */
-
- package com.vaadin.terminal.gwt.client;
-
- import java.util.Date;
-
- import com.google.gwt.user.client.ui.RootPanel;
-
- /**
- * 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 MOS_ANDROID = "android";
- private static final String MOS_IOS = "ios";
-
- 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 {
- 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 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
- + browserDetails.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
- + browserDetails.getBrowserMajorVersion();
- minorVersionClass = majorVersionClass
- + browserDetails.getBrowserMinorVersion();
- browserEngineClass = ENGINE_WEBKIT;
- } else if (browserDetails.isIE()) {
- browserIdentifier = BROWSER_IE;
- majorVersionClass = browserIdentifier
- + browserDetails.getBrowserMajorVersion();
- minorVersionClass = majorVersionClass
- + browserDetails.getBrowserMinorVersion();
- browserEngineClass = ENGINE_TRIDENT;
- } else if (browserDetails.isOpera()) {
- browserIdentifier = BROWSER_OPERA;
- majorVersionClass = browserIdentifier
- + browserDetails.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 + " " + prefix + osClass;
- }
-
- String mosClass = getMobileOperatingSystemClass();
- if (mosClass != null) {
- cssClass = cssClass + " " + prefix + mosClass;
- }
- }
-
- return cssClass;
- }
-
- private String getOperatingSystemClass() {
- if (browserDetails.isWindows()) {
- return OS_WINDOWS;
- } else if (browserDetails.isLinux()) {
- return OS_LINUX;
- } else if (browserDetails.isMacOSX()) {
- return OS_MACOSX;
- }
- // Unknown OS
- return null;
- }
-
- private String getMobileOperatingSystemClass() {
- if (isAndroid()) {
- return MOS_ANDROID;
- } else if (browserDetails.isIOS()) {
- return MOS_IOS;
- }
- // Unknown MOS
- return null;
- }
-
- public boolean isIE() {
- return browserDetails.isIE();
- }
-
- public boolean isFirefox() {
- return browserDetails.isFirefox();
- }
-
- public boolean isSafari() {
- return browserDetails.isSafari();
- }
-
- public boolean isSafari4() {
- return isSafari() && browserDetails.getBrowserMajorVersion() == 4;
- }
-
- public boolean isIE6() {
- return isIE() && browserDetails.getBrowserMajorVersion() == 6;
- }
-
- public boolean isIE7() {
- return isIE() && browserDetails.getBrowserMajorVersion() == 7;
- }
-
- public boolean isIE8() {
- return isIE() && browserDetails.getBrowserMajorVersion() == 8;
- }
-
- public boolean isIE9() {
- return isIE() && browserDetails.getBrowserMajorVersion() == 9;
- }
-
- public boolean isChrome() {
- return browserDetails.isChrome();
- }
-
- public boolean isGecko() {
- return browserDetails.isGecko();
- }
-
- public boolean isWebkit() {
- return browserDetails.isWebKit();
- }
-
- public boolean isFF2() {
- // FIXME: Should use browserVersion
- return browserDetails.isFirefox()
- && browserDetails.getBrowserEngineVersion() == 1.8;
- }
-
- public boolean isFF3() {
- // FIXME: Should use browserVersion
- return browserDetails.isFirefox()
- && browserDetails.getBrowserEngineVersion() == 1.9;
- }
-
- public boolean isFF4() {
- return browserDetails.isFirefox()
- && browserDetails.getBrowserMajorVersion() == 4;
- }
-
- /**
- * 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 browserDetails.getBrowserMajorVersion();
- }
-
- public float getOperaVersion() {
- if (!browserDetails.isOpera()) {
- return -1;
- }
-
- return browserDetails.getBrowserMajorVersion();
- }
-
- public boolean isOpera() {
- return browserDetails.isOpera();
- }
-
- public boolean isOpera10() {
- return browserDetails.isOpera()
- && browserDetails.getBrowserMajorVersion() == 10;
- }
-
- public boolean isOpera11() {
- return browserDetails.isOpera()
- && browserDetails.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;
- }-*/;
-
- /**
- * Get's the timezone offset from GMT in minutes, as reported by the
- * browser. DST affects this value.
- *
- * @return offset to GMT in minutes
- */
- public native int getTimezoneOffset()
- /*-{
- return new Date().getTimezoneOffset();
- }-*/;
-
- /**
- * Gets the timezone offset from GMT in minutes, as reported by the browser
- * AND adjusted to ignore daylight savings time. DST does not affect this
- * value.
- *
- * @return offset to GMT in minutes
- */
- public native int getRawTimezoneOffset()
- /*-{
- var d = new Date();
- var tzo1 = d.getTimezoneOffset(); // current offset
-
- for (var m=12;m>0;m--) {
- d.setUTCMonth(m);
- var tzo2 = d.getTimezoneOffset();
- if (tzo1 != tzo2) {
- // NOTE js indicates this 'backwards' (e.g -180)
- return (tzo1 > tzo2 ? tzo1 : tzo2); // offset w/o DST
- }
- }
-
- return tzo1; // no DST
-
- }-*/;
-
- /**
- * Gets the difference in minutes between the browser's GMT timezone and
- * DST.
- *
- * @return the amount of minutes that the timezone shifts when DST is in
- * effect
- */
- public native int getDSTSavings()
- /*-{
- var d = new Date();
- var tzo1 = d.getTimezoneOffset(); // current offset
-
- for (var m=12;m>0;m--) {
- d.setUTCMonth(m);
- var tzo2 = d.getTimezoneOffset();
- if (tzo1 != tzo2) {
- // NOTE js indicates this 'backwards' (e.g -180)
- return (tzo1 > tzo2 ? tzo1-tzo2 : tzo2-tzo1); // offset w/o DST
- }
- }
-
- return 0; // no DST
- }-*/;
-
- /**
- * Determines whether daylight savings time (DST) is currently in effect in
- * the region of the browser or not.
- *
- * @return true if the browser resides at a location that currently is in
- * DST
- */
- public boolean isDSTInEffect() {
- return getTimezoneOffset() != getRawTimezoneOffset();
- }
-
- /**
- * Returns the current date and time of the browser. This will not be
- * entirely accurate due to varying network latencies, but should provide a
- * close-enough value for most cases.
- *
- * @return the current date and time of the browser.
- */
- public Date getCurrentDate() {
- return new Date();
- }
-
- /**
- * @return true if the browser runs on a touch based device.
- */
- public boolean isTouchDevice() {
- return touchDevice;
- }
-
- /**
- * 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 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;
- }
-
- if (isAndroid() && isWebkit() && getWebkitVersion() < 534) {
- return true;
- }
- // if (isIOS() && isWebkit() && getWebkitVersion() < ???) {
- // return true;
- // }
-
- return false;
- }
-
- }
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