Improve callback support

[gpl/argeo-suite.git] / swt / org.argeo.app.geo.swt / src / org / argeo / app / geo / swt / SwtJavaScriptMapPart.java

diff --git a/swt/org.argeo.app.geo.swt/src/org/argeo/app/geo/swt/SwtJavaScriptMapPart.java b/swt/org.argeo.app.geo.swt/src/org/argeo/app/geo/swt/SwtJavaScriptMapPart.java
deleted file mode 100644 (file)
index 7d5d71d..0000000
--- a/swt/org.argeo.app.geo.swt/src/org/argeo/app/geo/swt/SwtJavaScriptMapPart.java
+++ /dev/null
@@ -1,141 +0,0 @@
-package org.argeo.app.geo.swt;
-
-import java.util.HashMap;
-import java.util.Locale;
-import java.util.Map;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.CompletionStage;
-
-import org.argeo.api.cms.CmsConstants;
-import org.argeo.api.cms.CmsLog;
-import org.argeo.api.cms.ux.CmsView;
-import org.argeo.app.geo.ux.JsImplementation;
-import org.argeo.app.geo.ux.MapPart;
-import org.argeo.app.ux.SuiteUxEvent;
-import org.argeo.cms.swt.CmsSwtUtils;
-import org.eclipse.swt.SWT;
-import org.eclipse.swt.browser.Browser;
-import org.eclipse.swt.browser.BrowserFunction;
-import org.eclipse.swt.browser.ProgressEvent;
-import org.eclipse.swt.browser.ProgressListener;
-import org.eclipse.swt.layout.GridData;
-import org.eclipse.swt.widgets.Composite;
-
-/**
- * An SWT implementation of {@link MapPart} based on JavaScript execute in a
- * {@link Browser} control.
- */
-public class SwtJavaScriptMapPart extends Composite implements MapPart {
-       static final long serialVersionUID = 2713128477504858552L;
-
-       private final static CmsLog log = CmsLog.getLog(SwtJavaScriptMapPart.class);
-
-       private Browser browser;
-
-       private CompletableFuture<Boolean> pageLoaded = new CompletableFuture<>();
-
-       private String jsImplementation = JsImplementation.OPENLAYERS_MAP_PART.getJsClass();
-       private String mapVar = "globalThis.argeoMap";
-
-       private final CmsView cmsView;
-
-       public SwtJavaScriptMapPart(Composite parent, int style) {
-               super(parent, style);
-               parent.setLayout(CmsSwtUtils.noSpaceGridLayout());
-               setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
-               setLayout(CmsSwtUtils.noSpaceGridLayout());
-
-               cmsView = CmsSwtUtils.getCmsView(parent);
-
-               browser = new Browser(this, SWT.BORDER);
-               browser.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
-
-               // functions exposed to JavaScript
-               new onFeatureSelect();
-
-               browser.setUrl("/pkg/org.argeo.app.geo.js/index.html");
-               browser.addProgressListener(new ProgressListener() {
-                       static final long serialVersionUID = 1L;
-
-                       @Override
-                       public void completed(ProgressEvent event) {
-                               try {
-                                       // create map
-                                       browser.execute(mapVar + " = new " + jsImplementation + "();");
-                                       pageLoaded.complete(true);
-                               } catch (Exception e) {
-                                       log.error("Cannot create map in browser", e);
-                                       pageLoaded.complete(false);
-                               }
-                       }
-
-                       @Override
-                       public void changed(ProgressEvent event) {
-                       }
-               });
-       }
-
-       @Override
-       public void addPoint(double lng, double lat, String style) {
-               callMethod(mapVar, "addPoint(%f, %f, %s)", lng, lat, style == null ? "'default'" : style);
-       }
-
-       @Override
-       public void addUrlLayer(String url, GeoFormat format) {
-               callMethod(mapVar, "addUrlLayer('%s', '%s')", url, format.name());
-       }
-
-       @Override
-       public void setZoom(int zoom) {
-               callMethod(mapVar, "setZoom(%d)", zoom);
-       }
-
-       @Override
-       public void setCenter(double lng, double lat) {
-               callMethod(mapVar, "setCenter(%f, %f)", lng, lat);
-       }
-
-       protected CompletionStage<Object> callMethod(String jsObject, String methodCall, Object... args) {
-               return evaluate(jsObject + '.' + methodCall, args);
-       }
-
-       /**
-        * Execute this JavaScript on the client side after making sure that the page
-        * has been loaded and the map object has been created.
-        * 
-        * @param js   the JavaScript code, possibly formatted according to
-        *             {@link String#format}, with {@link Locale#ROOT} as locale (for
-        *             stability of decimal separator, as expected by JavaScript.
-        * @param args the optional arguments of
-        *             {@link String#format(String, Object...)}
-        */
-       protected CompletionStage<Object> evaluate(String js, Object... args) {
-               CompletableFuture<Object> res = pageLoaded.thenApply((ready) -> {
-                       if (!ready)
-                               throw new IllegalStateException("Map " + mapVar + " is not initialised.");
-                       Object result = browser.evaluate(String.format(Locale.ROOT, js, args));
-                       return result;
-               });
-               return res.minimalCompletionStage();
-       }
-
-       /** JavaScript function called when a feature is selected on the map. */
-       private class onFeatureSelect extends BrowserFunction {
-
-               onFeatureSelect() {
-                       super(browser, onFeatureSelect.class.getSimpleName());
-               }
-
-               @Override
-               public Object function(Object[] arguments) {
-                       if (arguments.length == 0)
-                               return null;
-                       String path = arguments[0].toString();
-                       Map<String, Object> properties = new HashMap<>();
-                       properties.put(SuiteUxEvent.CONTENT_PATH, '/' + CmsConstants.SYS_WORKSPACE + path);
-                       cmsView.sendEvent(SuiteUxEvent.refreshPart.topic(), properties);
-                       return null;
-               }
-
-       }
-}