Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.utils.ui / src / org / simantics / utils / ui / gfx / rasterize / LazyRasterizer.java

diff --git a/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/rasterize/LazyRasterizer.java b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/rasterize/LazyRasterizer.java
new file mode 100644 (file)
index 0000000..a4129e2
--- /dev/null
+++ b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/rasterize/LazyRasterizer.java
@@ -0,0 +1,152 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+/*\r
+ * 25.1.2007\r
+ */\r
+package org.simantics.utils.ui.gfx.rasterize;\r
+\r
+import java.util.LinkedList;\r
+\r
+import org.eclipse.core.runtime.IProgressMonitor;\r
+import org.eclipse.core.runtime.IStatus;\r
+import org.eclipse.core.runtime.Status;\r
+import org.eclipse.core.runtime.jobs.Job;\r
+import org.eclipse.swt.graphics.ImageData;\r
+\r
+/**\r
+ * LazyRasterizer\r
+ * \r
+ * @author Toni Kalajainen\r
+ */\r
+public class LazyRasterizer {\r
+\r
+    public static void addJob(RasterJob job) {\r
+        getJob().addJob(job);\r
+    }\r
+\r
+    public static void addAsFirstJob(RasterJob job) {\r
+        getJob().addAsFirstJob(job);\r
+    }\r
+\r
+    public static void removeJob(RasterJob job) {\r
+        getJob().removeJob(job);\r
+    }\r
+\r
+    static RasterizeJob job;\r
+\r
+    synchronized static RasterizeJob getJob() {\r
+        if (job == null)\r
+            job = new RasterizeJob();\r
+        return job;\r
+    }\r
+\r
+    static class RasterizeJob extends Job {\r
+        LinkedList<RasterJob> queue = new LinkedList<RasterJob>();\r
+\r
+        @SuppressWarnings("unused")\r
+        private boolean isRunning;\r
+\r
+        public RasterizeJob() {\r
+            super("Rasterize Job");\r
+        }\r
+\r
+        @Override\r
+        protected IStatus run(IProgressMonitor monitor) {\r
+            //System.out.println(Thread.currentThread());\r
+            setThread(Thread.currentThread());\r
+            int taskLeft = 10000;\r
+            isRunning = true;\r
+            monitor.beginTask("Rasterizing", taskLeft);\r
+            try {\r
+                // 1. Pick a job\r
+                RasterJob job = pullNextJob();\r
+                do {\r
+                    // 2. Check if canceled\r
+                    if (monitor.isCanceled()) {\r
+                        cancel();\r
+                        return Status.CANCEL_STATUS;\r
+                    }\r
+                    // 3. rasterize\r
+                    if (job != null) {\r
+                        try {\r
+                            monitor.subTask(job.raster.toString());\r
+                            ImageData id = job.raster.rasterize(job.width, job.height);\r
+                            job.listener.rasterizationComplete(job, id);\r
+                        } catch (Exception e) {\r
+                            job.listener.rasterizationFailed(job, e);\r
+                        }\r
+\r
+                        int jobsLeft = jobsLeft();\r
+                        double workLeft;\r
+                        if (jobsLeft == 0) {\r
+                            workLeft = taskLeft;\r
+                        } else {\r
+                            workLeft = ((double) taskLeft) / ((double) jobsLeft());\r
+                        }\r
+                        int worked = (int) workLeft;\r
+                        monitor.worked(worked);\r
+                        taskLeft -= worked;\r
+                    }\r
+                    monitor.subTask("");\r
+                    // 4. Pick next job\r
+                    job = pullNextJob();\r
+                } while (job != null);\r
+                isRunning = false;\r
+\r
+            } finally {\r
+                monitor.done();\r
+            }\r
+            return Status.OK_STATUS;\r
+        }\r
+\r
+        protected synchronized int jobsLeft() {\r
+            return queue.size();\r
+        }\r
+\r
+        protected synchronized RasterJob pullNextJob() {\r
+            if (queue.isEmpty())\r
+                return null;\r
+            return queue.removeFirst();\r
+        }\r
+\r
+        public synchronized void clear() {\r
+            RasterJob jobs[] = queue.toArray(new RasterJob[0]);\r
+            for (RasterJob j : jobs)\r
+                removeJob(j);\r
+        }\r
+\r
+        public synchronized void addJob(RasterJob job) {            \r
+            queue.addLast(job);\r
+            job.status = RasterJobStatus.QUEUED;\r
+            //if (!isRunning && queue.size()==1)\r
+                schedule();\r
+        }\r
+\r
+        public synchronized void addAsFirstJob(RasterJob job) {            \r
+            queue.addFirst(job);\r
+            job.status = RasterJobStatus.QUEUED;\r
+            //if (!isRunning && queue.size()==1)\r
+                schedule();\r
+        }\r
+        \r
+        public synchronized boolean removeJob(RasterJob job) {\r
+            if (queue.remove(job)) {\r
+                job.status = RasterJobStatus.COMPLETE;\r
+                job.listener.rasterizationCanceled(job);\r
+                return true;\r
+            }\r
+            return false;\r
+        }\r
+\r
+    }\r
+\r
+}\r