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Case sensitive tab completion.

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This commit is contained in:
Olof Larsson 2015-08-03 11:52:39 +02:00
parent e6de76fb1f
commit 98ba8cda53
2 changed files with 68 additions and 55 deletions
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112
src/com/massivecraft/massivecore/cmd/arg/ARAbstract.java
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@ -85,16 +85,25 @@ public abstract class ARAbstract<T> implements AR<T>
@Override
public List<String> getTabListFiltered(CommandSender sender, String arg)
{
// Filter them to start with what the user typed in.
// Get the raw tab list.
Collection<String> raw = this.getTabList(sender, arg);
// Handle null case.
if (raw == null || raw.isEmpty()) return Collections.emptyList();
// Only keep the suggestions that starts with what the user already typed in.
// This is the first basic step of tab completion.
// "Ca" can complete into "Cayorion".
// "Ma" can complete into "Madus"
// "Ca" can not complete into "Madus" because it does not start with ignore case.
List<String> ret = Txt.getStartsWithIgnoreCase(raw, arg);
// Initial simple cleanup of suggestions.
cleanSuggestions(ret);
// Here we do a lot of things related to spaces.
// Because spaces and tab completion desn't go well together.
// In the future we might be able to do something better,
// but MineCraft has its limitations.
// Because spaces and tab completion doesn't go well together.
// In the future we might be able to do something better, but Minecraft has its limitations.
ret = prepareForSpaces(ret, arg);
return ret;
@ -104,17 +113,30 @@ public abstract class ARAbstract<T> implements AR<T>
// PRIVATE: TAB COMPLETE CALCULATIONS
// -------------------------------------------- //
// This method performs an initial cleanup of suggestions.
// Currently we just throw away nulls and empty strings.
private static void cleanSuggestions(List<String> suggestions)
{
ListIterator<String> iter = suggestions.listIterator();
while (iter.hasNext())
{
String suggestion = iter.next();
if (suggestion == null || suggestion.isEmpty())
{
iter.remove();
}
}
}
public static List<String> prepareForSpaces(List<String> suggestions, String arg)
{
cleanSuggestions(suggestions);
// This will get the common prefix for all passed in suggestions.
// This will allow us to tab complete some things with spaces
// if we know they all start with the same value,
// so we don't have to replace all of it.
final String prefix = getPrefix(suggestions);
// This is all the suggetions without the common prefix.
// This is all the suggestions without the common prefix.
List<String> ret = withoutPreAndSuffix(suggestions, prefix);
// If it isn't empty and there is a prefix...
if ( ! ret.isEmpty() && ! prefix.isEmpty())
@ -142,15 +164,41 @@ public abstract class ARAbstract<T> implements AR<T>
return ret;
}
private static void cleanSuggestions(List<String> suggestions)
private static String getPrefix(List<String> suggestions)
{
for (ListIterator<String> it = suggestions.listIterator(); it.hasNext();)
String prefix = null;
for (String suggestion : suggestions)
{
String suggestion = it.next();
if (suggestion == null) it.remove();
else if (suggestion.isEmpty()) it.remove();
else it.set(suggestion.toLowerCase());
prefix = getOkay(prefix, suggestion);
}
if (prefix == null) return "";
int lastSpace = prefix.lastIndexOf(" ");
if (lastSpace == -1) return "";
return prefix.substring(0, lastSpace + 1);
}
// This method return a new string only including the first characters that are equal.
private static String getOkay(String original, String compared)
{
if (original == null) return compared;
final int size = Math.min(original.length(), compared.length());
StringBuilder ret = new StringBuilder();
for (int i = 0; i < size; i++)
{
if (Character.toLowerCase(compared.charAt(i)) != Character.toLowerCase(original.charAt(i))) break;
ret.append(compared.charAt(i));
}
if (ret.length() == 0) return "";
int lastSpace = ret.lastIndexOf(" ");
if (lastSpace == -1) return "";
return ret.toString();
}
private static List<String> withoutPreAndSuffix(List<String> suggestions, String prefix)
@ -177,42 +225,4 @@ public abstract class ARAbstract<T> implements AR<T>
return new ArrayList<String>(ret);
}
private static String getPrefix(List<String> suggestions)
{
String prefix = null;
for (String suggestion : suggestions)
{
prefix = getOkay(prefix, suggestion);
}
if (prefix == null) return "";
int lastSpace = prefix.lastIndexOf(" ");
if (lastSpace == -1) return "";
return prefix.substring(0, lastSpace+1);
}
// This method return a new string only including
// the first characters that are equal.
private static String getOkay(String original, String compared)
{
if (original == null) return compared;
final int size = Math.min(original.length(), compared.length());
StringBuilder ret = new StringBuilder();
for (int i = 0; i < size; i++)
{
if (Character.toLowerCase(compared.charAt(i)) != Character.toLowerCase(original.charAt(i))) break;
ret.append(compared.charAt(i));
}
if (ret.length() == 0) return "";
int lastSpace = ret.lastIndexOf(" ");
if (lastSpace == -1) return "";
return ret.toString();
}
}

7
src/com/massivecraft/massivecore/util/Txt.java
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@ -582,16 +582,19 @@ public class Txt
// FILTER
// -------------------------------------------- //
public static <T> List<T> getFiltered(Collection<T> elements, Predictate<T> predictate)
public static <T> List<T> getFiltered(Iterable<T> elements, Predictate<T> predictate)
{
// Create Ret
List<T> ret = new ArrayList<T>();
// Fill Ret
for (T element : elements)
{
if ( ! predictate.apply(element)) continue;
ret.add(element);
}
// Return Ret
return ret;
}
@ -600,7 +603,7 @@ public class Txt
return getFiltered(Arrays.asList(elements), predictate);
}
public static List<String> getStartsWithIgnoreCase(Collection<String> elements, String prefix)
public static List<String> getStartsWithIgnoreCase(Iterable<String> elements, String prefix)
{
return getFiltered(elements, PredictateStartsWithIgnoreCase.get(prefix));
}