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- /*
- * Copyright 2000-2014 Vaadin Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
- package com.vaadin.client.connectors;
-
- import java.util.ArrayList;
- import java.util.Collection;
-
- import com.google.gwt.core.client.JavaScriptObject;
- import com.google.gwt.core.client.JsArrayString;
- import com.google.gwt.dom.client.NativeEvent;
- import com.vaadin.client.BrowserInfo;
- import com.vaadin.client.JavaScriptConnectorHelper;
- import com.vaadin.client.Util;
- import com.vaadin.client.communication.HasJavaScriptConnectorHelper;
- import com.vaadin.client.renderers.ComplexRenderer;
- import com.vaadin.client.renderers.Renderer;
- import com.vaadin.client.widget.grid.CellReference;
- import com.vaadin.client.widget.grid.RendererCellReference;
- import com.vaadin.shared.JavaScriptExtensionState;
- import com.vaadin.shared.ui.Connect;
- import com.vaadin.ui.renderers.AbstractJavaScriptRenderer;
-
- import elemental.json.JsonObject;
- import elemental.json.JsonValue;
-
- /**
- * Connector for server-side renderer implemented using JavaScript.
- *
- * @since 7.4
- * @author Vaadin Ltd
- */
- // This is really typed to <JsonValue>, but because of the way native strings
- // are not always instanceof JsonValue, we need to accept Object
- @Connect(AbstractJavaScriptRenderer.class)
- public class JavaScriptRendererConnector
- extends AbstractRendererConnector<Object>
- implements HasJavaScriptConnectorHelper {
- private final JavaScriptConnectorHelper helper = new JavaScriptConnectorHelper(
- this);
-
- private final JavaScriptObject cellReferenceWrapper = createCellReferenceWrapper(
- BrowserInfo.get().isIE8());
-
- @Override
- protected void init() {
- super.init();
- helper.init();
-
- addGetRowKey(helper.getConnectorWrapper());
- }
-
- private static native JavaScriptObject createCellReferenceWrapper(
- boolean isIE8)
- /*-{
- var reference = {};
- if (isIE8) {
- // IE8 only supports defineProperty for DOM objects
- reference = $doc.createElement('div');
- }
-
- var setProperty = function(name, getter, setter) {
- var descriptor = {
- get: getter
- }
- if (setter) {
- descriptor.set = setter;
- }
- Object.defineProperty(reference, name, descriptor);
- };
-
- setProperty("element", function() {
- return reference.target.@CellReference::getElement()();
- }, null);
-
- setProperty("rowIndex", function() {
- return reference.target.@CellReference::getRowIndex()();
- }, null);
-
- setProperty("columnIndex", function() {
- return reference.target.@CellReference::getColumnIndex()();
- }, null);
-
- setProperty("colSpan", function() {
- return reference.target.@RendererCellReference::getColSpan()();
- }, function(colSpan) {
- reference.target.@RendererCellReference::setColSpan(*)(colSpan);
- });
-
- return reference;
- }-*/;
-
- @Override
- public JavaScriptExtensionState getState() {
- return (JavaScriptExtensionState) super.getState();
- }
-
- private native void addGetRowKey(JavaScriptObject wrapper)
- /*-{
- var self = this;
- wrapper.getRowKey = $entry(function(rowIndex) {
- return @JavaScriptRendererConnector::findRowKey(*)(self, rowIndex);
- });
- }-*/;
-
- private static String findRowKey(JavaScriptRendererConnector connector,
- int rowIndex) {
- GridConnector gc = (GridConnector) connector.getParent();
- JsonObject row = gc.getWidget().getDataSource().getRow(rowIndex);
- return connector.getRowKey(row);
- }
-
- private boolean hasFunction(String name) {
- return hasFunction(helper.getConnectorWrapper(), name);
- }
-
- private static native boolean hasFunction(JavaScriptObject wrapper,
- String name)
- /*-{
- return typeof wrapper[name] === 'function';
- }-*/;
-
- @Override
- protected Renderer<Object> createRenderer() {
- helper.ensureJavascriptInited();
-
- if (!hasFunction("render")) {
- throw new RuntimeException(
- "JavaScriptRenderer " + helper.getInitFunctionName()
- + " must have a function named 'render'");
- }
-
- final boolean hasInit = hasFunction("init");
- final boolean hasDestroy = hasFunction("destroy");
- final boolean hasOnActivate = hasFunction("onActivate");
- final boolean hasGetConsumedEvents = hasFunction("getConsumedEvents");
- final boolean hasOnBrowserEvent = hasFunction("onBrowserEvent");
-
- return new ComplexRenderer<Object>() {
- @Override
- public void render(RendererCellReference cell, Object data) {
- if (data instanceof JsonValue) {
- data = Util.json2jso((JsonValue) data);
- }
- render(helper.getConnectorWrapper(), getJsCell(cell), data);
- }
-
- private JavaScriptObject getJsCell(CellReference<?> cell) {
- updateCellReference(cellReferenceWrapper, cell);
- return cellReferenceWrapper;
- }
-
- public native void render(JavaScriptObject wrapper,
- JavaScriptObject cell, Object data)
- /*-{
- wrapper.render(cell, data);
- }-*/;
-
- @Override
- public void init(RendererCellReference cell) {
- if (hasInit) {
- init(helper.getConnectorWrapper(), getJsCell(cell));
- }
- }
-
- private native void init(JavaScriptObject wrapper,
- JavaScriptObject cell)
- /*-{
- wrapper.init(cell);
- }-*/;
-
- private native void updateCellReference(
- JavaScriptObject cellWrapper, CellReference<?> target)
- /*-{
- cellWrapper.target = target;
- }-*/;
-
- @Override
- public void destroy(RendererCellReference cell) {
- if (hasDestroy) {
- destory(helper.getConnectorWrapper(), getJsCell(cell));
- } else {
- super.destroy(cell);
- }
- }
-
- private native void destory(JavaScriptObject wrapper,
- JavaScriptObject cell)
- /*-{
- wrapper.destory(cell);
- }-*/;
-
- @Override
- public boolean onActivate(CellReference<?> cell) {
- if (hasOnActivate) {
- return onActivate(helper.getConnectorWrapper(),
- getJsCell(cell));
- } else {
- return super.onActivate(cell);
- }
- }
-
- private native boolean onActivate(JavaScriptObject wrapper,
- JavaScriptObject cell)
- /*-{
- return !!wrapper.onActivate(cell);
- }-*/;
-
- @Override
- public Collection<String> getConsumedEvents() {
- if (hasGetConsumedEvents) {
- JsArrayString events = getConsumedEvents(
- helper.getConnectorWrapper());
-
- ArrayList<String> list = new ArrayList<String>(
- events.length());
- for (int i = 0; i < events.length(); i++) {
- list.add(events.get(i));
- }
- return list;
- } else {
- return super.getConsumedEvents();
- }
- }
-
- private native JsArrayString getConsumedEvents(
- JavaScriptObject wrapper)
- /*-{
- var rawEvents = wrapper.getConsumedEvents();
- var events = [];
- for(var i = 0; i < rawEvents.length; i++) {
- events[i] = ""+rawEvents[i];
- }
- return events;
- }-*/;
-
- @Override
- public boolean onBrowserEvent(CellReference<?> cell,
- NativeEvent event) {
- if (hasOnBrowserEvent) {
- return onBrowserEvent(helper.getConnectorWrapper(),
- getJsCell(cell), event);
- } else {
- return super.onBrowserEvent(cell, event);
- }
- }
-
- private native boolean onBrowserEvent(JavaScriptObject wrapper,
- JavaScriptObject cell, NativeEvent event)
- /*-{
- return !!wrapper.onBrowserEvent(cell, event);
- }-*/;
- };
- }
-
- @Override
- public Object decode(JsonValue value) {
- // Let the js logic decode the raw json that the server sent
- return value;
- }
-
- @Override
- public void onUnregister() {
- super.onUnregister();
- helper.onUnregister();
- }
-
- @Override
- public JavaScriptConnectorHelper getJavascriptConnectorHelper() {
- return helper;
- }
- }
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