1 files changed, 62 insertions, 0 deletions
diff --git a/traveler/AsciiTraveler.cc b/traveler/AsciiTraveler.cc
new file mode 100644
index 0000000..db4088d
--- /dev/null
+++ b/traveler/AsciiTraveler.cc
@@ -0,0 +1,62 @@
+#include "AsciiTraveler.hh"
+
+namespace pcc {
+const std::string AsciiTraveler::MiddleLevelPrefix_ = "|-";
+const std::string AsciiTraveler::LastLevelPrefix_ = "`-";
+const std::string AsciiTraveler::MiddleChildPrefix_ = "| ";
+const std::string AsciiTraveler::LastChildPrefix_ = "  ";
+const size_t AsciiTraveler::LevelWidth_ =
+    AsciiTraveler::MiddleLevelPrefix_.size();
+
+AsciiTraveler::AsciiTraveler(std::ostream& out)
+    : Traveler(out)
+    , prefix_("")
+    , level_(0) {
+    IsLastChild_.push(true);
+}
+
+Traveler& AsciiTraveler::operator<<(TravelPart part) {
+    switch (part) {
+    case TravelPart::PREFIX:
+        out_ << prefix_
+             << (IsLastChild_.top() ? LastLevelPrefix_ : MiddleLevelPrefix_);
+        break;
+    case TravelPart::NAME_BEGIN:
+        out_ << '<';
+        break;
+    case TravelPart::NAME_END:
+        out_ << '>';
+        break;
+        break;
+    case TravelPart::DESCRPTION_BEGIN:
+        out_ << '<';
+        break;
+    case TravelPart::DESCRPTION_END:
+        out_ << ">\n";
+        break;
+    case TravelPart::CHILD_BEGIN:
+        prefix_.append(IsLastChild_.top() ? LastChildPrefix_
+                                          : MiddleChildPrefix_);
+        IsLastChild_.push(false);
+        ++level_;
+        break;
+    case TravelPart::LAST_CHILD_BEGIN:
+        prefix_.append(IsLastChild_.top() ? LastChildPrefix_
+                                          : MiddleChildPrefix_);
+        IsLastChild_.push(true);
+        ++level_;
+        break;
+    case TravelPart::CHILD_END:
+    case TravelPart::LAST_CHILD_END:
+        prefix_.erase(prefix_.size() - LevelWidth_);
+        IsLastChild_.pop();
+        --level_;
+        break;
+    case TravelPart::END:
+        break;
+    default:
+        break;
+    }
+    return *this;
+}
+} // namespace pcc