needed for applet search

[jalview.git] / src / com / stevesoft / pat / Range.java

diff --git a/src/com/stevesoft/pat/Range.java b/src/com/stevesoft/pat/Range.java
new file mode 100755 (executable)
index 0000000..5d5f9a1
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+++ b/src/com/stevesoft/pat/Range.java
@@ -0,0 +1,61 @@
+//\r
+// This software is now distributed according to\r
+// the Lesser Gnu Public License.  Please see\r
+// http://www.gnu.org/copyleft/lesser.txt for\r
+// the details.\r
+//    -- Happy Computing!\r
+//\r
+package com.stevesoft.pat;\r
+import java.util.Hashtable;\r
+\r
+/** Thrown when one encounters things like [z-a] */\r
+class BadRangeArgs extends RegSyntax {};\r
+\r
+/** Implments a subelement (ranges) of the [] pattern element.\r
+For example, [a-z023] is implemented using a range and tree oneChar\r
+classes.\r
+@see Bracket\r
+@see oneChar\r
+*/\r
+class Range extends Pattern {\r
+    char lo,hi,altlo,althi;\r
+    boolean printBrackets = false;\r
+    public String toString() {\r
+        String s=protect(""+lo,PROTECT_THESE,ESC)+"-"\r
+            +protect(""+hi,PROTECT_THESE,ESC);\r
+        if(!printBrackets)\r
+            return s;\r
+        return "["+s+"]";\r
+    }\r
+    Range(char loi,char hii) throws RegSyntax {\r
+        lo = loi; hi = hii;\r
+        oneChar o = null;\r
+        if(lo >= hi)\r
+            //throw new BadRangeArgs();\r
+            RegSyntaxError.endItAll("Badly formed []'s : "+lo+" >= "+hi);\r
+        o = new oneChar(lo);\r
+        altlo = o.altc;\r
+        o = new oneChar(hi);\r
+        althi = o.altc;\r
+    }\r
+    public int matchInternal(int pos,Pthings pt) {\r
+        if(pos >= pt.src.length()) return -1;\r
+        if(Masked(pos,pt)) return -1;\r
+        char c = pt.src.charAt(pos);\r
+        if(lo <= c && c <= hi ||\r
+                (pt.ignoreCase && (altlo <= c && c <= althi)))\r
+            return nextMatch(pos+1,pt);\r
+        return -1;\r
+    }\r
+    public patInt minChars() { return new patInt(1); }\r
+    public patInt maxChars() { return new patInt(1); }\r
+    public Pattern clone1(Hashtable h) {\r
+        try {\r
+            Range r = new Range(lo,hi);\r
+            r.printBrackets = printBrackets;\r
+            return r;\r
+        } catch(RegSyntax rs) {\r
+            return null;\r
+        }\r
+    }\r
+};\r