1 files changed, 38 insertions, 0 deletions
diff --git a/platform/android/viewer/src/com/artifex/mupdfdemo/MuPDFCancellableTaskDefinition.java b/platform/android/viewer/src/com/artifex/mupdfdemo/MuPDFCancellableTaskDefinition.java
new file mode 100644
index 00000000..b95d8e93
--- /dev/null
+++ b/platform/android/viewer/src/com/artifex/mupdfdemo/MuPDFCancellableTaskDefinition.java
@@ -0,0 +1,38 @@
+package com.artifex.mupdfdemo;
+
+public abstract class MuPDFCancellableTaskDefinition<Params, Result> implements CancellableTaskDefinition<Params, Result>
+{
+	private MuPDFCore.Cookie cookie;
+
+	public MuPDFCancellableTaskDefinition(MuPDFCore core)
+	{
+		this.cookie = core.new Cookie();
+	}
+
+	@Override
+	public void doCancel()
+	{
+		if (cookie == null)
+			return;
+
+		cookie.abort();
+	}
+
+	@Override
+	public void doCleanup()
+	{
+		if (cookie == null)
+			return;
+
+		cookie.destroy();
+		cookie = null;
+	}
+
+	@Override
+	public final Result doInBackground(Params ... params)
+	{
+		return doInBackground(cookie, params);
+	}
+
+	public abstract Result doInBackground(MuPDFCore.Cookie cookie, Params ... params);
+}