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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.skylark.skylint;
import com.google.common.base.Preconditions;
import com.google.devtools.build.lib.events.Location.LineAndColumn;
import javax.annotation.Nullable;
/**
* Location range of a linter warning.
*
* <p>It is a closed interval: [start, end], i.e. the end location is the last character in the
* range.
*/
public class LocationRange {
public final Location start;
public final Location end;
public LocationRange(Location start, Location end) {
Preconditions.checkArgument(
Location.compare(start, end) <= 0,
"end location (%s) should be after start location (%s)",
end,
start);
this.start = start;
this.end = end;
}
public static LocationRange from(com.google.devtools.build.lib.events.Location location) {
Location start = Location.from(location.getStartLineAndColumn());
Location end = Location.from(location.getEndLineAndColumn());
return new LocationRange(start, end);
}
public static int compare(LocationRange l1, LocationRange l2) {
int cmp = Location.compare(l1.start, l2.start);
if (cmp != 0) {
return cmp;
}
return Location.compare(l1.end, l2.end);
}
@Override
public String toString() {
return start + "-" + end;
}
/** Single location in a file (line + column). */
public static class Location {
public final int line;
public final int column;
public Location(int line, int column) {
this.line = line;
this.column = column;
}
public static Location from(@Nullable LineAndColumn lac) {
// LineAndColumn may be null, e.g. if a BuildFileAST contains no statements:
if (lac == null) {
return new Location(1, 1);
}
return new Location(lac.getLine(), lac.getColumn());
}
public static int compare(Location l1, Location l2) {
int cmp = l1.line - l2.line;
if (cmp != 0) {
return cmp;
}
return l1.column - l2.column;
}
@Override
public String toString() {
return line + ":" + column;
}
}
}
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