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-rw-r--r--core/fpdfdoc/cpvt_wordrange.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/core/fpdfdoc/cpvt_wordrange.h b/core/fpdfdoc/cpvt_wordrange.h
index ed06d6f0de..638f6c17c0 100644
--- a/core/fpdfdoc/cpvt_wordrange.h
+++ b/core/fpdfdoc/cpvt_wordrange.h
@@ -7,6 +7,7 @@
#ifndef CORE_FPDFDOC_CPVT_WORDRANGE_H_
#define CORE_FPDFDOC_CPVT_WORDRANGE_H_
+#include <algorithm>
#include <utility>
#include "core/fpdfdoc/cpvt_wordplace.h"
@@ -41,6 +42,16 @@ struct CPVT_WordRange {
Normalize();
}
+ CPVT_WordRange Intersect(const CPVT_WordRange& that) const {
+ if (that.EndPos < BeginPos || that.BeginPos > EndPos ||
+ EndPos < that.BeginPos || BeginPos > that.EndPos) {
+ return CPVT_WordRange();
+ }
+
+ return CPVT_WordRange(std::max(BeginPos, that.BeginPos),
+ std::min(EndPos, that.EndPos));
+ }
+
inline bool IsEmpty() const { return BeginPos == EndPos; }
inline bool operator==(const CPVT_WordRange& wr) const {
return wr.BeginPos == BeginPos && wr.EndPos == EndPos;