com.risevision.ui.client.presentation.common.HtmlEditorWidget.java Source code

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Here is the source code for com.risevision.ui.client.presentation.common.HtmlEditorWidget.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.presentation.common;

import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.dom.client.Style.Overflow;
import com.google.gwt.event.logical.shared.ResizeEvent;
import com.google.gwt.event.logical.shared.ResizeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.SimplePanel;
import com.risevision.ui.client.common.controller.CommonHeaderController;

public class HtmlEditorWidget extends SimplePanel {
    private String elementId = "htmlEditorDiv_" + System.currentTimeMillis();
    private JavaScriptObject editor;
    private boolean fixedSize = false;

    private HandlerRegistration resizeHandler;

    public HtmlEditorWidget() {
        this(false);
    }

    public HtmlEditorWidget(boolean fixedSize) {
        super();

        this.fixedSize = fixedSize;
        styleControls();
    }

    protected void onLoad() {
        if (editor == null) {
            this.getElement().setAttribute("id", elementId);
            editor = initCodeMirrorNative();
        }

        if (!fixedSize) {
            resizeHandler = Window.addResizeHandler(new ResizeHandler() {
                @Override
                public void onResize(ResizeEvent event) {
                    resize();
                }
            });

            resize();
        }
    }

    protected void onUnload() {
        super.onUnload();

        if (resizeHandler != null) {
            resizeHandler.removeHandler();
            resizeHandler = null;
        }

        if (editor != null) {
            destroyInstance();
            editor = null;
        }
        //      this.getElement().setInnerHTML("");
    }

    public void onShow() {
        refresh();
    }

    private void styleControls() {
        this.setStyleName("rdn-DeckPanel");
        this.getElement().getStyle().setOverflow(Overflow.HIDDEN);
    }

    private void resize() {
        this.setWidth(Math.max(Window.getClientWidth() - 31, 200) + "px");

        this.setHeight(Math.max(CommonHeaderController.getContentHeight() - 50, 50) + "px");

        refresh();
    }

    private native JavaScriptObject initCodeMirrorNative() /*-{
                                                           //      debugger;
                                                               
                                                           var id = this.@com.risevision.ui.client.presentation.common.HtmlEditorWidget::elementId;
                                                           var element = $wnd.document.getElementById(id);
                                                               
                                                           return new $wnd.CodeMirror(element, {
                                                           mode: "htmlmixed",
                                                           indentUnit: 4,
                                                           indentWithTabs: true,
                                                           //         lineWrapping: true,
                                                           });
                                                           }-*/;

    public void setText(String text) {
        if (editor != null && text != null) {
            setTextNative(text);
        }
    }

    private native void setTextNative(String text) /*-{ 
                                                   this.@com.risevision.ui.client.presentation.common.HtmlEditorWidget::editor.setValue(text);
                                                   }-*/;

    public String getText() {
        if (editor != null) {
            return getTextNative();
        }
        return "";
    }

    private native String getTextNative() /*-{ 
                                          return this.@com.risevision.ui.client.presentation.common.HtmlEditorWidget::editor.getValue();
                                          }-*/;

    private native void refresh() /*-{ 
                                  this.@com.risevision.ui.client.presentation.common.HtmlEditorWidget::editor.refresh();
                                  }-*/;

    private native void destroyInstance() /*-{
                                          //      debugger;
                                              
                                          var instance = this.@com.risevision.ui.client.presentation.common.HtmlEditorWidget::editor.getWrapperElement();
                                          if (instance) {
                                          var id = this.@com.risevision.ui.client.presentation.common.HtmlEditorWidget::elementId;
                                          var element = $wnd.document.getElementById(id);
                                          if (element) {
                                          element.removeChild(instance);
                                          }
                                          }
                                          }-*/;
}