Bug 483038 - Allow to configures editor highlightings based on JSON

1 files changed, 50 insertions, 0 deletions

diff --git a/bundles/code/org.eclipse.fx.code.editor.configuration.text/src/org/eclipse/fx/code/editor/configuration/text/Util.java b/bundles/code/org.eclipse.fx.code.editor.configuration.text/src/org/eclipse/fx/code/editor/configuration/text/Util.java
new file mode 100644
index 000000000..c0419d7e5
--- /dev/null
+++ b/bundles/code/org.eclipse.fx.code.editor.configuration.text/src/org/eclipse/fx/code/editor/configuration/text/Util.java
@@ -0,0 +1,50 @@
+package org.eclipse.fx.code.editor.configuration.text;
+
+import java.util.function.IntPredicate;
+
+import org.eclipse.fx.code.editor.configuration.Check;
+import org.eclipse.fx.code.editor.configuration.Equals;
+import org.eclipse.fx.code.editor.configuration.Range;
+import org.eclipse.fx.core.function.IntRelationOperation;
+import org.eclipse.fx.text.rules.ColumnStartRule;
+import org.eclipse.fx.text.rules.PredicateColumnStartRule;
+import org.eclipse.jface.text.rules.IPredicateRule;
+import org.eclipse.jface.text.rules.IRule;
+
+@SuppressWarnings("restriction")
+public class Util {
+	public static IRule wrap(Check check, IRule rule) {
+		if( check == null ) {
+			return rule;
+		} else {
+			IntPredicate p = null;
+			if( check instanceof Equals ) {
+				int c = ((Equals) check).getValue();
+				p = v -> v == c;
+			} else if( check instanceof Range ) {
+				Range r = (Range) check;
+				if( r.getMin() != -1 && r.getMax() != -1 ) {
+					int min = r.getMin();
+					int max = r.getMax();
+					IntRelationOperation minOp = r.isMinIncl() ? IntRelationOperation::lt : IntRelationOperation::lte;
+					IntRelationOperation maxOp = r.isMaxIncl() ? IntRelationOperation::lt : IntRelationOperation::lte;
+					p = v -> minOp.apply(min, v) && maxOp.apply(v,max);
+				} else if( r.getMin() != -1 ) {
+					int min = r.getMin();
+					IntRelationOperation minOp = r.isMinIncl() ? IntRelationOperation::lt : IntRelationOperation::lte;
+					p = v -> minOp.apply(min, v);
+				} else if( r.getMax() != -1 ) {
+					int max = r.getMax();
+					IntRelationOperation maxOp = r.isMaxIncl() ? IntRelationOperation::lt : IntRelationOperation::lte;
+					p = v -> maxOp.apply(v,max);
+				}
+			}
+
+			if( p != null ) {
+				return rule instanceof IPredicateRule ? new PredicateColumnStartRule((IPredicateRule) rule, p) : new ColumnStartRule(rule, p);
+			} else {
+				return rule;
+			}
+		}
+	}
+}