Java tutorial
/* * WindowEx.java * * Copyright (C) 2009-12 by RStudio, Inc. * * Unless you have received this program directly from RStudio pursuant * to the terms of a commercial license agreement with RStudio, then * this program is licensed to you under the terms of version 3 of the * GNU Affero General Public License. This program is distributed WITHOUT * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT, * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details. * */ package org.rstudio.core.client.dom; import com.google.gwt.core.client.JavaScriptObject; import com.google.gwt.core.client.JsArrayInteger; import com.google.gwt.dom.client.Document; import com.google.gwt.dom.client.NativeEvent; import com.google.gwt.event.dom.client.BlurEvent; import com.google.gwt.event.dom.client.BlurHandler; import com.google.gwt.event.dom.client.FocusEvent; import com.google.gwt.event.dom.client.FocusHandler; import com.google.gwt.event.shared.GwtEvent; import com.google.gwt.event.shared.HandlerManager; import com.google.gwt.event.shared.HandlerRegistration; import com.google.gwt.event.shared.HasHandlers; import org.rstudio.core.client.Point; public class WindowEx extends JavaScriptObject { public static native WindowEx get() /*-{ return $wnd; }-*/; protected WindowEx() { } public final native void focus() /*-{ this.focus(); }-*/; public final native void print() /*-{ this.print() ; }-*/; public final native void back() /*-{ this.history.back() ; }-*/; public final native void forward() /*-{ this.history.forward() ; }-*/; public final native void removeSelection() /*-{ selection = this.getSelection(); if (selection != null) { selection.removeAllRanges(); } }-*/; public final native boolean find(String term, boolean matchCase, boolean searchUpward, boolean wrapAround, boolean wholeWord) /*-{ return this.find(term, matchCase, searchUpward, wrapAround, wholeWord); }-*/; public final native String getLocationHref() /*-{ return this.location.href ; }-*/; public final native boolean isSecure() /*-{ return 'https:' == this.location.protocol; }-*/; public final native void reload() /*-{ this.location.reload(true); }-*/; public final native void setLocationHref(String helpURL) /*-{ this.location.href = helpURL ; }-*/; public final native void replaceLocationHref(String helpURL) /*-{ this.location.replace(helpURL) ; }-*/; public final Point getScrollPosition() { JsArrayInteger pos = getScrollPositionInternal(); return new Point(pos.get(0), pos.get(1)); } public final void setScrollPosition(Point pos) { setScrollPositionInternal(pos.x, pos.y); } private final native JsArrayInteger getScrollPositionInternal() /*-{ return [this.scrollX, this.scrollY]; }-*/; private final native void setScrollPositionInternal(int x, int y) /*-{ this.scrollTo(x, y); }-*/; public final native void close() /*-{ this.close(); }-*/; public final native boolean isClosed() /*-{ // On the desktop, it is possible in some circumstances for satellite // window objects to become decoupled from their physical windows when // closed--they are still marked open but are effectively zombies. To work // around this we have the desktop frame manually label the window object // as closed with rstudioSatelliteClosed so that we can appropriately // treat it as closed. return this.closed || this.rstudioSatelliteClosed; }-*/; public final native void resizeTo(int width, int height) /*-{ this.resizeTo(width, height); }-*/; public final native Document getDocument() /*-{ return this.document; }-*/; public final native int getLeft() /*-{ return this.screenX; }-*/; public final native int getTop() /*-{ return this.screenY; }-*/; public final native int getOuterHeight() /*-{ return this.outerHeight; }-*/; public final native int getOuterWidth() /*-{ return this.outerWidth; }-*/; public final native void scrollTo(int x, int y) /*-{ this.scrollTo(x, y); }-*/; public final native int getScrollLeft() /*-{ return this.scrollX; }-*/; public final native int getScrollTop() /*-{ return this.scrollY; }-*/; public final native void postMessage(JavaScriptObject data, String origin) /*-{ this.postMessage(data, origin); }-*/; public static HandlerRegistration addFocusHandler(FocusHandler handler) { return handlers_.addHandler(FocusEvent.getType(), handler); } public static HandlerRegistration addBlurHandler(BlurHandler handler) { return handlers_.addHandler(BlurEvent.getType(), handler); } private static void fireFocusHandlers() { NativeEvent nativeEvent = Document.get().createFocusEvent(); FocusEvent.fireNativeEvent(nativeEvent, new HasHandlers() { public void fireEvent(GwtEvent<?> event) { handlers_.fireEvent(event); } }); } private static void fireBlurHandlers() { NativeEvent nativeEvent = Document.get().createBlurEvent(); BlurEvent.fireNativeEvent(nativeEvent, new HasHandlers() { public void fireEvent(GwtEvent<?> event) { handlers_.fireEvent(event); } }); } static { registerNativeListeners(); } private static native void registerNativeListeners() /*-{ $wnd.onfocus = function() { @org.rstudio.core.client.dom.WindowEx::fireFocusHandlers()(); }; $wnd.onblur = function() { @org.rstudio.core.client.dom.WindowEx::fireBlurHandlers()(); }; }-*/; private static final HandlerManager handlers_ = new HandlerManager(null); }