--- /dev/null
+package org.simantics.ui.workbench.e4;\r
+\r
+import java.util.List;\r
+import java.util.Map;\r
+\r
+import org.eclipse.e4.core.contexts.IEclipseContext;\r
+import org.eclipse.e4.ui.model.application.MApplication;\r
+import org.eclipse.e4.ui.model.application.ui.MUIElement;\r
+import org.eclipse.e4.ui.model.application.ui.advanced.MArea;\r
+import org.eclipse.e4.ui.model.application.ui.advanced.MPlaceholder;\r
+import org.eclipse.e4.ui.model.application.ui.basic.MPart;\r
+import org.eclipse.e4.ui.model.application.ui.basic.MPartSashContainerElement;\r
+import org.eclipse.e4.ui.model.application.ui.basic.MPartStack;\r
+import org.eclipse.e4.ui.workbench.modeling.EModelService;\r
+import org.eclipse.e4.ui.workbench.modeling.EPartService;\r
+import org.eclipse.e4.ui.workbench.modeling.EPartService.PartState;\r
+import org.eclipse.ui.PlatformUI;\r
+import org.simantics.db.Resource;\r
+import org.simantics.utils.datastructures.ArrayMap;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ *\r
+ */\r
+public class E4WorkbenchUtils {\r
+\r
+ private static final String[] KEYS_RESOURCE = { E4ResourceEditorConstants.KEY_RESOURCE };\r
+\r
+ /**\r
+ * \r
+ */\r
+ private static final String TAG_EDITOR = "Editor";\r
+\r
+ /**\r
+ * The Legacy IDE application ID for the "editor area" partstack. In E3\r
+ * compatibility mode legacy application the {@link MPartStack} lies under\r
+ * the shared {@link MArea} (org.eclipse.ui.editorss).\r
+ * \r
+ * <p>\r
+ * In a pure E4 application this needs to be changed.\r
+ */\r
+ public static final String EDITOR_PART_STACK_ID = "org.eclipse.e4.primaryDataStack";\r
+\r
+ public static final String EDITOR_AREA_ID = "org.eclipse.ui.editorss";\r
+\r
+ /**\r
+ * @param editorId\r
+ * @param contributionURI\r
+ * @param iconURI\r
+ * @param inputId\r
+ * @param inputMap\r
+ */\r
+ public static MPart openEditor(String editorId, String contributionURI, String iconURI, String inputId, Map<String, Object> inputMap) {\r
+ if (editorId == null)\r
+ throw new NullPointerException("null editor ID");\r
+ if (contributionURI == null)\r
+ throw new NullPointerException("null contributionURI");\r
+ if (inputId == null)\r
+ throw new NullPointerException("null input ID");\r
+ if (inputMap == null)\r
+ throw new NullPointerException("null input map");\r
+\r
+ IEclipseContext context = PlatformUI.getWorkbench().getService(IEclipseContext.class);\r
+ EModelService modelService = context.get(EModelService.class);\r
+ EPartService partService = context.get(EPartService.class);\r
+ MApplication app = context.get(MApplication.class);\r
+\r
+ String editorID = editorId + "_" + inputId;\r
+\r
+ List<MPart> parts = modelService.findElements(app, editorID, MPart.class, null);\r
+ MPart editor = null;\r
+ if (parts == null || parts.isEmpty()) {\r
+ editor = modelService.createModelElement(MPart.class);\r
+ editor.setElementId(editorID);\r
+ editor.setContributionURI(contributionURI);\r
+ if (iconURI != null)\r
+ editor.setIconURI(iconURI);\r
+ editor.setCloseable(true);\r
+ editor.getTags().add(TAG_EDITOR);\r
+ editor.getTransientData().putAll(inputMap);\r
+\r
+ MPartStack stack = getEditorPartStack(modelService, app);\r
+ stack.getChildren().add(editor);\r
+ } else {\r
+ editor = parts.get(0);\r
+ }\r
+\r
+ partService.showPart(editor, PartState.ACTIVATE);\r
+ return editor;\r
+ }\r
+\r
+ /**\r
+ * @param editorId\r
+ * @param contributionURI\r
+ * @param iconURI\r
+ * @param input\r
+ */\r
+ public static MPart openEditor(String editorId, String contributionURI, String iconURI, Resource input) {\r
+ String inputId = Long.toString(input.getResourceId());\r
+ Map<String, Object> inputMap = ArrayMap.make(KEYS_RESOURCE, input);\r
+ return openEditor(editorId, contributionURI, iconURI, inputId, inputMap);\r
+ }\r
+\r
+ /**\r
+ * @param editorElementId the unique element ID of the part (editor)\r
+ */\r
+ public static void closeEditor(String editorElementId) {\r
+ IEclipseContext context = PlatformUI.getWorkbench().getService(IEclipseContext.class);\r
+ EModelService modelService = context.get(EModelService.class);\r
+ MApplication app = context.get(MApplication.class);\r
+ modelService\r
+ .findElements(app, editorElementId, MPart.class, null)\r
+ .forEach(p -> p.getContext().get(EPartService.class).hidePart(p));\r
+ }\r
+\r
+ public static void activatePart(MPart part) {\r
+ EPartService partService = part.getContext().get(EPartService.class);\r
+ partService.activate(part);\r
+ }\r
+\r
+ public static MPartStack getEditorPartStack(EModelService modelService, MApplication app) {\r
+ MPartStack stack = (MPartStack) modelService.find(E4WorkbenchUtils.EDITOR_PART_STACK_ID, app);\r
+ if (stack == null) {\r
+ MArea editorArea = null;\r
+ MUIElement area = modelService.find(E4WorkbenchUtils.EDITOR_AREA_ID, app);\r
+ if (area instanceof MPlaceholder) {\r
+ editorArea = (MArea) ((MPlaceholder) area).getRef();\r
+ } else if (area instanceof MArea) {\r
+ editorArea = (MArea) area;\r
+ }\r
+ if (editorArea == null)\r
+ throw new IllegalStateException("Shared editor area (" + E4WorkbenchUtils.EDITOR_AREA_ID + ") not found in application model");\r
+ for (MPartSashContainerElement container : editorArea.getChildren()) {\r
+ if (container instanceof MPartStack) {\r
+ stack = (MPartStack) container;\r
+ break;\r
+ }\r
+ }\r
+ }\r
+ if (stack == null)\r
+ throw new IllegalStateException("Could not find part stack under editor area.");\r
+ return stack;\r
+ }\r
+\r
+}\r