com.risevision.ui.client.common.widgets.iframe.IFrameController.java Source code

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Here is the source code for com.risevision.ui.client.common.widgets.iframe.IFrameController.java

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// Copyright  2010 - May 2014 Rise Vision Incorporated.
// Use of this software is governed by the GPLv3 license
// (reproduced in the LICENSE file).

package com.risevision.ui.client.common.widgets.iframe;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.google.gwt.core.client.JsArrayString;
import com.risevision.common.client.utils.RiseUtils;

public class IFrameController {
    private static IFrameController instance;
    private static Map<String, IFramePanelWidget> widgets = new HashMap<String, IFramePanelWidget>();

    public static IFrameController getInstance() {
        try {
            if (instance == null) {
                instance = new IFrameController();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return instance;
    }

    private IFrameController() {
        registerJavaScriptCallbacks();
    }

    public void registerWidget(String id, IFramePanelWidget widget) {
        if (widget == null || RiseUtils.strIsNullOrEmpty(id)) {
            return;
        }

        widgets.put(id, widget);
    }

    public void unregisterWidget(String id) {
        widgets.remove(id);
    }

    private static void onMessageStatic(String source, String command, JsArrayString rawValues) {
        IFramePanelWidget widget = widgets.get(source);

        if (widget != null) {
            List<String> values = new ArrayList<>();
            if (rawValues != null) {
                for (int i = 0; i < rawValues.length(); i++) {
                    values.add(rawValues.get(i));
                }
            }

            widget.onMessage(command, values);
        }

    }

    // Set up the JS-callable signature as a global JS function.
    private native void registerJavaScriptCallbacks() /*-{   
                                                      $wnd.rva_iFrameController_onMessageStatic = @com.risevision.ui.client.common.widgets.iframe.IFrameController::onMessageStatic(Ljava/lang/String;Ljava/lang/String;Lcom/google/gwt/core/client/JsArrayString;);
                                                      }-*/;

}