| /******************************************************************************* |
| * Copyright (c) 2013 Tasktop Technologies and others. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * https://www.eclipse.org/legal/epl-2.0 |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.tasks.ui.views; |
| |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.TreePath; |
| import org.eclipse.jface.viewers.TreeSelection; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.mylyn.commons.core.StatusHandler; |
| import org.eclipse.mylyn.commons.workbench.DelayedRefreshJob; |
| import org.eclipse.mylyn.internal.tasks.core.AbstractTask; |
| import org.eclipse.mylyn.internal.tasks.core.AbstractTaskContainer; |
| import org.eclipse.mylyn.internal.tasks.core.ITaskListChangeListener; |
| import org.eclipse.mylyn.internal.tasks.core.TaskContainerDelta; |
| import org.eclipse.mylyn.internal.tasks.core.UncategorizedTaskContainer; |
| import org.eclipse.mylyn.internal.tasks.core.UnmatchedTaskContainer; |
| import org.eclipse.mylyn.internal.tasks.core.UnsubmittedTaskContainer; |
| import org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin; |
| import org.eclipse.mylyn.internal.tasks.ui.editors.TaskListChangeAdapter; |
| import org.eclipse.mylyn.internal.tasks.ui.util.TasksUiInternal; |
| import org.eclipse.mylyn.internal.tasks.ui.util.TreeWalker; |
| import org.eclipse.mylyn.internal.tasks.ui.util.TreeWalker.TreeVisitor; |
| import org.eclipse.mylyn.tasks.core.ITaskContainer; |
| import org.eclipse.swt.SWTException; |
| import org.eclipse.swt.widgets.TreeItem; |
| import org.eclipse.ui.PlatformUI; |
| |
| public final class TaskListRefreshJob extends DelayedRefreshJob { |
| private final AbstractTaskListView taskListView; |
| |
| private final ITaskListChangeListener TASKLIST_CHANGE_LISTENER = new TaskListChangeAdapter() { |
| |
| @Override |
| public void containersChanged(final Set<TaskContainerDelta> deltas) { |
| PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() { |
| public void run() { |
| for (TaskContainerDelta taskContainerDelta : deltas) { |
| if (taskListView.isScheduledPresentation()) { |
| // TODO: implement refresh policy for scheduled presentation |
| refresh(); |
| } else { |
| switch (taskContainerDelta.getKind()) { |
| case ROOT: |
| refresh(); |
| break; |
| case ADDED: |
| case REMOVED: |
| if (isFilteredContainer(taskContainerDelta)) { |
| // container may have changed visibility, refresh root |
| refresh(); |
| } else { |
| if (taskContainerDelta.getElement() != null) { |
| refreshElement(taskContainerDelta.getElement()); |
| } |
| if (taskContainerDelta.getParent() != null) { |
| refreshElement(taskContainerDelta.getParent()); |
| } else { |
| // element was added/removed from the root |
| refresh(); |
| } |
| } |
| break; |
| case CONTENT: |
| refreshElement(taskContainerDelta.getElement()); |
| } |
| |
| } |
| } |
| } |
| |
| private boolean isFilteredContainer(TaskContainerDelta taskContainerDelta) { |
| ITaskContainer parent = taskContainerDelta.getParent(); |
| return parent instanceof UnsubmittedTaskContainer || parent instanceof UnmatchedTaskContainer |
| || parent instanceof UncategorizedTaskContainer; |
| } |
| }); |
| } |
| }; |
| |
| public TaskListRefreshJob(AbstractTaskListView taskListView, TreeViewer treeViewer, String name) { |
| super(treeViewer, name); |
| this.taskListView = taskListView; |
| TasksUiInternal.getTaskList().addChangeListener(TASKLIST_CHANGE_LISTENER); |
| } |
| |
| @Override |
| protected void doRefresh(Object[] items) { |
| TreePath selection = preserveSelection(); |
| |
| if (items == null) { |
| viewer.refresh(true); |
| } else if (items.length > 0) { |
| try { |
| if (taskListView.isFocusedMode()) { |
| Set<Object> children = new HashSet<Object>(Arrays.asList(items)); |
| Set<AbstractTaskContainer> parents = new HashSet<AbstractTaskContainer>(); |
| for (Object item : items) { |
| if (item instanceof AbstractTask) { |
| parents.addAll(((AbstractTask) item).getParentContainers()); |
| } |
| } |
| // 1. refresh parents |
| children.removeAll(parents); |
| for (AbstractTaskContainer parent : parents) { |
| viewer.refresh(parent, false); |
| // only refresh label of parent |
| viewer.update(parent, null); |
| } |
| // 2. refresh children |
| for (Object item : children) { |
| viewer.refresh(item, true); |
| } |
| // 3. update states of all changed items |
| for (Object item : items) { |
| updateExpansionState(item); |
| } |
| } else { |
| Set<AbstractTaskContainer> parents = new HashSet<AbstractTaskContainer>(); |
| for (Object item : items) { |
| if (item instanceof AbstractTask) { |
| parents.addAll(((AbstractTask) item).getParentContainers()); |
| } |
| viewer.refresh(item, true); |
| updateExpansionState(item); |
| } |
| // refresh labels of parents for task activation or incoming indicators |
| for (AbstractTaskContainer parent : parents) { |
| // only refresh label |
| viewer.update(parent, null); |
| } |
| } |
| } catch (SWTException e) { |
| StatusHandler.log(new Status(IStatus.ERROR, TasksUiPlugin.ID_PLUGIN, "Failed to refresh viewer: " //$NON-NLS-1$ |
| + viewer, e)); |
| } |
| } |
| |
| taskListView.updateToolTip(false); |
| restoreSelection(selection); |
| } |
| |
| private TreePath preserveSelection() { |
| if (viewer instanceof TreeViewer) { |
| TreeViewer treeViewer = (TreeViewer) viewer; |
| // in case the refresh removes the currently selected item, |
| // remember the next item in the tree to restore the selection |
| // TODO: consider making this optional |
| TreeItem[] selection = treeViewer.getTree().getSelection(); |
| if (selection.length > 0) { |
| TreeWalker treeWalker = new TreeWalker(treeViewer); |
| return treeWalker.walk(new TreeVisitor() { |
| @Override |
| public boolean visit(Object object) { |
| return true; |
| } |
| }, selection[selection.length - 1]); |
| } |
| } |
| return null; |
| } |
| |
| private void restoreSelection(TreePath treePath) { |
| if (treePath != null) { |
| ISelection newSelection = viewer.getSelection(); |
| if (newSelection == null || newSelection.isEmpty()) { |
| viewer.setSelection(new TreeSelection(treePath), true); |
| } |
| } |
| } |
| |
| protected void updateExpansionState(Object item) { |
| if (taskListView.isFocusedMode() && taskListView.isAutoExpandMode()) { |
| taskListView.getViewer().expandToLevel(item, 3); |
| } |
| } |
| |
| public void dispose() { |
| TasksUiInternal.getTaskList().removeChangeListener(TASKLIST_CHANGE_LISTENER); |
| } |
| } |