From 9df4bb4fa30a0c05ccd484d6b59521bfca665854 Mon Sep 17 00:00:00 2001
From: "David A. Madore" <david@procyon.(none)>
Date: Tue, 27 Apr 2010 19:53:14 +0200
Subject: Dynamically generate subranges on large character zones.

---
 .../android/unicodeMap/UnicodeMapActivity.java     | 57 ++++++++++++++++------
 1 file changed, 41 insertions(+), 16 deletions(-)

(limited to 'src/org/madore/android/unicodeMap/UnicodeMapActivity.java')

diff --git a/src/org/madore/android/unicodeMap/UnicodeMapActivity.java b/src/org/madore/android/unicodeMap/UnicodeMapActivity.java
index e633006..b48c771 100644
--- a/src/org/madore/android/unicodeMap/UnicodeMapActivity.java
+++ b/src/org/madore/android/unicodeMap/UnicodeMapActivity.java
@@ -48,17 +48,18 @@ public final class UnicodeMapActivity extends ListActivity {
 	public RootDisplay() { super(null); }
     }
     protected static class RangeDisplay extends Display {
-	protected int from;  protected int to;
-	public RangeDisplay(String title, int from, int to) {
+	protected int from;  protected int to;  protected int limit;
+	public RangeDisplay(String title, int from, int to, int limit) {
 	    super(title);
-	    this.from = from;  this.to = to;
+	    this.from = from;  this.to = to;  this.limit = limit;
 	}
-	public RangeDisplay(UnicodeCharacter.Range rng) {
+	public RangeDisplay(UnicodeRangeable rng, int limit) {
 	    super(rng.getDescr());
-	    this.from = rng.getFrom();  this.to = rng.getTo();
+	    this.from = rng.getFrom();  this.to = rng.getTo();  this.limit = limit;
 	}
 	public int getFrom() { return this.from; }
 	public int getTo() { return this.to; }
+	public int getLimit() { return this.limit; }
     }
     protected static class SearchDisplay extends Display {
 	protected String like;  protected int limit;
@@ -165,9 +166,26 @@ public final class UnicodeMapActivity extends ListActivity {
 	} else if ( disp instanceof RangeDisplay ) {
 	    int from = ((RangeDisplay)disp).getFrom();
 	    int to = ((RangeDisplay)disp).getTo();
-	    list = new ArrayList<UnicodeDisplayable>(db.countRange(from,to));
-	    for ( UnicodeCharacter ch : db.getRange(from,to) )
-		list.add(ch);
+	    int count = db.countRange(from,to);
+	    if ( count > 1024 ) {
+		list = new ArrayList<UnicodeDisplayable>(count/128 + 1);
+		int from0 = from&(~127);
+		int to0 = ((to-1)|127)+1;
+		for ( int base=from0 ; base<to0 ; base+=128 ) {
+		    final int from1 = base<from?from:base;
+		    final int to1 = base+128>to?to:base+128;
+		    final String str = String.format("%04X\u2013%04X", from1, to1-1);
+		    list.add(new UnicodeRangeable() {
+			    public int getFrom() { return from1; }
+			    public int getTo() { return to1; }
+			    public String getDescr() { return str; }
+			});
+		}
+	    } else {
+		list = new ArrayList<UnicodeDisplayable>(count);
+		for ( UnicodeCharacter ch : db.getRange(from,to) )
+		    list.add(ch);
+	    }
 	    disp.setListCache(list);
 	    adapter = new UnicodeArrayAdapter(this, list);
 	    setListAdapter(adapter);
@@ -201,6 +219,8 @@ public final class UnicodeMapActivity extends ListActivity {
 	    setTitle(getResources().getString(R.string.app_name));
     }
 
+    final static int rangeLimit = 1024;
+
     protected class MapItemClickListener
 	implements AdapterView.OnItemClickListener,
 		   AdapterView.OnItemLongClickListener {
@@ -210,8 +230,8 @@ public final class UnicodeMapActivity extends ListActivity {
 		= (UnicodeDisplayable)parent.getItemAtPosition(position);
 	    if ( it instanceof UnicodeCharacter )
 		textForm.append(((UnicodeCharacter)it).getChar());
-	    else if ( it instanceof UnicodeCharacter.Range ) {
-		Display newDisp = new RangeDisplay((UnicodeCharacter.Range)it);
+	    else if ( it instanceof UnicodeRangeable ) {
+		Display newDisp = new RangeDisplay((UnicodeRangeable)it, rangeLimit);
 		saveDisplay(view, position);
 		doDisplay(newDisp, true);
 	    } else
@@ -246,8 +266,8 @@ public final class UnicodeMapActivity extends ListActivity {
 		text.setText(new String(s));
 		dialog.show();
 		return true;
-	    } else if ( it instanceof UnicodeCharacter.Range ) {
-		UnicodeCharacter.Range itr = (UnicodeCharacter.Range)it;
+	    } else if ( it instanceof UnicodeRangeable ) {
+		UnicodeRangeable itr = (UnicodeRangeable)it;
 		Dialog dialog = new Dialog(UnicodeMapActivity.this);
 		dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
 		dialog.setOwnerActivity(UnicodeMapActivity.this);
@@ -259,10 +279,15 @@ public final class UnicodeMapActivity extends ListActivity {
 		text = (TextView) dialog.findViewById(R.id.rangeRangeLabel);
 		StringBuilder s = new StringBuilder();
 		Formatter fmt = new Formatter(s);
-		fmt.format("%04X\u2013%04X (%d slots, %d chars)",
-			   itr.getFrom(), itr.getTo()-1,
-			   itr.getTo()-itr.getFrom(),
-			   db.countRange(itr.getFrom(), itr.getTo()));
+		if ( itr instanceof UnicodeCharacter.Range )
+		    fmt.format("%04X\u2013%04X (%d slots, %d chars)",
+			       itr.getFrom(), itr.getTo()-1,
+			       itr.getTo()-itr.getFrom(),
+			       db.countRange(itr.getFrom(), itr.getTo()));
+		else
+		    fmt.format("(%d slots, %d chars)",
+			       itr.getTo()-itr.getFrom(),
+			       db.countRange(itr.getFrom(), itr.getTo()));
 		text.setText(new String(s));
 		dialog.show();
 		return true;
-- 
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