X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fdata%2FRecentFileList.java;fp=src%2Ftim%2Fprune%2Fdata%2FRecentFileList.java;h=ee8b84d390a8a861ff6cc2508706e2768fc491d0;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/data/RecentFileList.java b/src/tim/prune/data/RecentFileList.java
new file mode 100644
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--- /dev/null
+++ b/src/tim/prune/data/RecentFileList.java
@@ -0,0 +1,164 @@
+package tim.prune.data;
+
+/**
+ * Class to hold and manage the list of recently used files
+ */
+public class RecentFileList
+{
+	private RecentFile[] _files = null;
+	private static final int DEFAULT_SIZE = 6;
+	private static final int MAX_SIZE = 20;
+
+	/**
+	 * Default constructor
+	 */
+	public RecentFileList()
+	{
+		_files = new RecentFile[DEFAULT_SIZE];
+	}
+
+	/**
+	 * Constructor
+	 * @param inString String from config
+	 */
+	public RecentFileList(String inString)
+	{
+		_files = null;
+		int pos = 0;
+		if (inString != null && inString.length() > 0)
+		{
+			for (String s : inString.split(";"))
+			{
+				if (pos == 0)
+				{
+					int listSize = DEFAULT_SIZE;
+					try
+					{
+						listSize = Integer.parseInt(s);
+						if (listSize < 1 || listSize > MAX_SIZE) {
+							listSize = DEFAULT_SIZE;
+						}
+					}
+					catch (NumberFormatException nfe) {}
+					_files = new RecentFile[listSize];
+					pos++;
+				}
+				else if (pos <= _files.length)
+				{
+					RecentFile rf = new RecentFile(s);
+					if (rf.isValid())
+					{
+						_files[pos-1] = rf;
+						pos++;
+					}
+				}
+			}
+		}
+		if (_files == null) {
+			_files = new RecentFile[DEFAULT_SIZE];
+		}
+	}
+
+	/**
+	 * @return size of list (may not have this many entries yet)
+	 */
+	public int getSize()
+	{
+		if (_files == null) return 0;
+		return _files.length;
+	}
+
+	/**
+	 * @return the number of valid entries in the list
+	 */
+	public int getNumEntries()
+	{
+		if (_files == null) return 0;
+		int numFound = 0;
+		for (RecentFile rf : _files) {
+			if (rf != null && rf.isValid())
+				numFound++;
+		}
+		return numFound;
+	}
+
+	/**
+	 * @return string to save in config
+	 */
+	public String getConfigString()
+	{
+		StringBuilder builder = new StringBuilder(100);
+		int size = getSize();
+		builder.append("" + size);
+		for (RecentFile f : _files)
+		{
+			builder.append(';');
+			if (f != null) builder.append(f.getConfigString());
+		}
+		return builder.toString();
+	}
+
+	/**
+	 * Add the given file to the top of the list
+	 * @param inRF file to add
+	 */
+	public void addFile(RecentFile inRF)
+	{
+		// Build a new array with the latest file at the top
+		RecentFile[] files = new RecentFile[_files.length];
+		int rfIndex = 0;
+		if (inRF != null && inRF.isValid())
+		{
+			files[rfIndex] = inRF;
+			rfIndex++;
+		}
+		// Loop, copying the other files
+		for (RecentFile rf : _files)
+		{
+			if (rf != null && rf.isValid() && (inRF==null || !rf.isSameFile(inRF)))
+			{
+				files[rfIndex] = rf;
+				rfIndex++;
+				if (rfIndex >= files.length) break;
+			}
+		}
+		_files = files;
+	}
+
+	/**
+	 * Verify all the entries and remove the invalid ones
+	 */
+	public void verifyAll() {
+		addFile(null);
+	}
+
+	/**
+	 * Get the RecentFile object at the given index
+	 * @param inIndex index, starting at 0
+	 * @return RecentFile object or null if out of range
+	 */
+	public RecentFile getFile(int inIndex)
+	{
+		if (inIndex < 0 || inIndex >= _files.length) return null;
+		return _files[inIndex];
+	}
+
+	/**
+	 * Resize the list to the new size
+	 * @param inNewSize new size of list
+	 */
+	public void resizeList(int inNewSize)
+	{
+		// don't do anything if size doesn't make sense
+		if (inNewSize > 0 && inNewSize <= MAX_SIZE)
+		{
+			RecentFile[] files = new RecentFile[inNewSize];
+			int numToCopy = _files.length;
+			if (inNewSize < numToCopy) {
+				numToCopy = inNewSize;
+			}
+			System.arraycopy(_files, 0, files, 0, numToCopy);
+			_files = files;
+		}
+	}
+}