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- /*
- @VaadinApache2LicenseForJavaFiles@
- */
-
- package com.vaadin.terminal.gwt.client.ui;
-
- import java.util.ArrayList;
- import java.util.LinkedHashSet;
-
- import com.google.gwt.core.client.Scheduler;
- import com.google.gwt.core.client.Scheduler.ScheduledCommand;
- import com.google.gwt.event.logical.shared.ResizeEvent;
- import com.google.gwt.event.logical.shared.ResizeHandler;
- import com.google.gwt.event.logical.shared.ValueChangeEvent;
- import com.google.gwt.event.logical.shared.ValueChangeHandler;
- import com.google.gwt.event.shared.HandlerRegistration;
- import com.google.gwt.user.client.Command;
- import com.google.gwt.user.client.DOM;
- import com.google.gwt.user.client.Event;
- import com.google.gwt.user.client.History;
- import com.google.gwt.user.client.Timer;
- import com.google.gwt.user.client.Window;
- import com.google.gwt.user.client.ui.SimplePanel;
- import com.vaadin.terminal.gwt.client.ApplicationConnection;
- import com.vaadin.terminal.gwt.client.BrowserInfo;
- import com.vaadin.terminal.gwt.client.ComponentConnector;
- import com.vaadin.terminal.gwt.client.Focusable;
- import com.vaadin.terminal.gwt.client.UIDL;
- import com.vaadin.terminal.gwt.client.Util;
- import com.vaadin.terminal.gwt.client.VConsole;
- import com.vaadin.terminal.gwt.client.ui.ShortcutActionHandler.ShortcutActionHandlerOwner;
-
- /**
- *
- */
- public class VView extends SimplePanel implements ResizeHandler,
- Window.ClosingHandler, ShortcutActionHandlerOwner, Focusable {
-
- public static final String FRAGMENT_VARIABLE = "fragment";
-
- private static final String CLASSNAME = "v-view";
-
- public static final String NOTIFICATION_HTML_CONTENT_NOT_ALLOWED = "useplain";
-
- String theme;
-
- ComponentConnector layout;
-
- final LinkedHashSet<VWindow> subWindows = new LinkedHashSet<VWindow>();
-
- String id;
-
- ShortcutActionHandler actionHandler;
-
- /** stored width for IE resize optimization */
- private int width;
-
- /** stored height for IE resize optimization */
- private int height;
-
- ApplicationConnection connection;
-
- /** Identifies the click event */
- public static final String CLICK_EVENT_ID = "click";
-
- /**
- * We are postponing resize process with IE. IE bugs with scrollbars in some
- * situations, that causes false onWindowResized calls. With Timer we will
- * give IE some time to decide if it really wants to keep current size
- * (scrollbars).
- */
- private Timer resizeTimer;
-
- int scrollTop;
-
- int scrollLeft;
-
- boolean rendering;
-
- boolean scrollable;
-
- boolean immediate;
-
- boolean resizeLazy = false;
-
- /**
- * Attribute name for the lazy resize setting .
- */
- public static final String RESIZE_LAZY = "rL";
-
- private HandlerRegistration historyHandlerRegistration;
-
- /**
- * The current URI fragment, used to avoid sending updates if nothing has
- * changed.
- */
- String currentFragment;
-
- /**
- * Listener for URI fragment changes. Notifies the server of the new value
- * whenever the value changes.
- */
- private final ValueChangeHandler<String> historyChangeHandler = new ValueChangeHandler<String>() {
- public void onValueChange(ValueChangeEvent<String> event) {
- String newFragment = event.getValue();
-
- // Send the new fragment to the server if it has changed
- if (!newFragment.equals(currentFragment) && connection != null) {
- currentFragment = newFragment;
- connection.updateVariable(id, FRAGMENT_VARIABLE, newFragment,
- true);
- }
- }
- };
-
- private VLazyExecutor delayedResizeExecutor = new VLazyExecutor(200,
- new ScheduledCommand() {
- public void execute() {
- windowSizeMaybeChanged(Window.getClientWidth(),
- Window.getClientHeight());
- }
-
- });
-
- public VView() {
- super();
- setStyleName(CLASSNAME);
-
- // Allow focusing the view by using the focus() method, the view
- // should not be in the document focus flow
- getElement().setTabIndex(-1);
- }
-
- @Override
- protected void onAttach() {
- super.onAttach();
- historyHandlerRegistration = History
- .addValueChangeHandler(historyChangeHandler);
- currentFragment = History.getToken();
- }
-
- @Override
- protected void onDetach() {
- super.onDetach();
- historyHandlerRegistration.removeHandler();
- historyHandlerRegistration = null;
- }
-
- /**
- * Called when the window might have been resized.
- *
- * @param newWidth
- * The new width of the window
- * @param newHeight
- * The new height of the window
- */
- protected void windowSizeMaybeChanged(int newWidth, int newHeight) {
- boolean changed = false;
- if (width != newWidth) {
- width = newWidth;
- changed = true;
- VConsole.log("New window width: " + width);
- }
- if (height != newHeight) {
- height = newHeight;
- changed = true;
- VConsole.log("New window height: " + height);
- }
- if (changed) {
- VConsole.log("Running layout functions due to window resize");
- Util.runWebkitOverflowAutoFix(getElement());
-
- sendClientResized();
-
- connection.doLayout(false);
- }
- }
-
- public String getTheme() {
- return theme;
- }
-
- /**
- * Used to reload host page on theme changes.
- */
- static native void reloadHostPage()
- /*-{
- $wnd.location.reload();
- }-*/;
-
- /**
- * Evaluate the given script in the browser document.
- *
- * @param script
- * Script to be executed.
- */
- static native void eval(String script)
- /*-{
- try {
- if (script == null) return;
- $wnd.eval(script);
- } catch (e) {
- }
- }-*/;
-
- /**
- * Returns true if the body is NOT generated, i.e if someone else has made
- * the page that we're running in. Otherwise we're in charge of the whole
- * page.
- *
- * @return true if we're running embedded
- */
- public boolean isEmbedded() {
- return !getElement().getOwnerDocument().getBody().getClassName()
- .contains(ApplicationConnection.GENERATED_BODY_CLASSNAME);
- }
-
- /**
- * Tries to scroll paintable referenced from given UIDL snippet to be
- * visible.
- *
- * @param uidl
- */
- void scrollIntoView(final UIDL uidl) {
- if (uidl.hasAttribute("scrollTo")) {
- Scheduler.get().scheduleDeferred(new Command() {
- public void execute() {
- final ComponentConnector paintable = (ComponentConnector) uidl
- .getPaintableAttribute("scrollTo", connection);
- paintable.getWidget().getElement().scrollIntoView();
- }
- });
- }
- }
-
- @Override
- public void onBrowserEvent(Event event) {
- super.onBrowserEvent(event);
- int type = DOM.eventGetType(event);
- if (type == Event.ONKEYDOWN && actionHandler != null) {
- actionHandler.handleKeyboardEvent(event);
- return;
- } else if (scrollable && type == Event.ONSCROLL) {
- updateScrollPosition();
- }
- }
-
- /**
- * Updates scroll position from DOM and saves variables to server.
- */
- private void updateScrollPosition() {
- int oldTop = scrollTop;
- int oldLeft = scrollLeft;
- scrollTop = DOM.getElementPropertyInt(getElement(), "scrollTop");
- scrollLeft = DOM.getElementPropertyInt(getElement(), "scrollLeft");
- if (connection != null && !rendering) {
- if (oldTop != scrollTop) {
- connection.updateVariable(id, "scrollTop", scrollTop, false);
- }
- if (oldLeft != scrollLeft) {
- connection.updateVariable(id, "scrollLeft", scrollLeft, false);
- }
- }
- }
-
- /*
- * (non-Javadoc)
- *
- * @see
- * com.google.gwt.event.logical.shared.ResizeHandler#onResize(com.google
- * .gwt.event.logical.shared.ResizeEvent)
- */
- public void onResize(ResizeEvent event) {
- onResize();
- }
-
- /**
- * Called when a resize event is received.
- */
- void onResize() {
- /*
- * IE (pre IE9 at least) will give us some false resize events due to
- * problems with scrollbars. Firefox 3 might also produce some extra
- * events. We postpone both the re-layouting and the server side event
- * for a while to deal with these issues.
- *
- * We may also postpone these events to avoid slowness when resizing the
- * browser window. Constantly recalculating the layout causes the resize
- * operation to be really slow with complex layouts.
- */
- boolean lazy = resizeLazy || BrowserInfo.get().isIE8();
-
- if (lazy) {
- delayedResizeExecutor.trigger();
- } else {
- windowSizeMaybeChanged(Window.getClientWidth(),
- Window.getClientHeight());
- }
- }
-
- /**
- * Send new dimensions to the server.
- */
- private void sendClientResized() {
- connection.updateVariable(id, "height", height, false);
- connection.updateVariable(id, "width", width, immediate);
- }
-
- public native static void goTo(String url)
- /*-{
- $wnd.location = url;
- }-*/;
-
- public void onWindowClosing(Window.ClosingEvent event) {
- // Change focus on this window in order to ensure that all state is
- // collected from textfields
- // TODO this is a naive hack, that only works with text fields and may
- // cause some odd issues. Should be replaced with a decent solution, see
- // also related BeforeShortcutActionListener interface. Same interface
- // might be usable here.
- VTextField.flushChangesFromFocusedTextField();
- }
-
- private native static void loadAppIdListFromDOM(ArrayList<String> list)
- /*-{
- var j;
- for(j in $wnd.vaadin.vaadinConfigurations) {
- list.@java.util.Collection::add(Ljava/lang/Object;)(j);
- }
- }-*/;
-
- /**
- * Return an iterator for current subwindows. This method is meant for
- * testing purposes only.
- *
- * @return
- */
- public ArrayList<VWindow> getSubWindowList() {
- ArrayList<VWindow> windows = new ArrayList<VWindow>(subWindows.size());
- for (VWindow widget : subWindows) {
- windows.add(widget);
- }
- return windows;
- }
-
- public ShortcutActionHandler getShortcutActionHandler() {
- return actionHandler;
- }
-
- public void focus() {
- getElement().focus();
- }
-
- }
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