Add player labels for normal form game visuals

src/games/writer.cc

@@ -52,18 +52,35 @@ std::string WriteHTMLFile(const Game &p_game, const GamePlayer &p_rowPlayer,
 
     theHtml += "<table>";
     theHtml += "<tr>";
-    theHtml += "<td></td>";
+    theHtml += R"(<td colspan="2" rowspan="2"></td>)";
+    theHtml += R"(<td colspan=")" + std::to_string(p_colPlayer->GetStrategies().size()) +
+               R"(" align="center"><b>)";
+    theHtml += p_colPlayer->GetLabel();
+    theHtml += "</b></td>";
+    theHtml += "</tr>";
+    theHtml += "<tr>";
     for (const auto &strategy : p_colPlayer->GetStrategies()) {
-      theHtml += "<td align=center><b>";
+      theHtml += R"(<td align="center"><b>)";
       theHtml += strategy->GetLabel();
       theHtml += "</b></td>";
     }
     theHtml += "</tr>";
+
+    bool first_row_strategy = true;
     for (const auto &row_strategy : p_rowPlayer->GetStrategies()) {
       const PureStrategyProfile profile = iter;
       profile->SetStrategy(row_strategy);
       theHtml += "<tr>";
-      theHtml += "<td align=center><b>";
+
+      if (first_row_strategy) {
+        theHtml += R"(<td rowspan=")" + std::to_string(p_rowPlayer->GetStrategies().size()) +
+                   R"(" align="center" valign="middle"><b>)";
+        theHtml += p_rowPlayer->GetLabel();
+        theHtml += "</b></td>";
+        first_row_strategy = false;
+      }
+
+      theHtml += R"(<td align="center"><b>)";
       theHtml += row_strategy->GetLabel();
       theHtml += "</b></td>";
       for (const auto &col_strategy : p_colPlayer->GetStrategies()) {

tests/test_io.py

@@ -101,8 +101,12 @@ def test_write_efg_as_nfg():
 
 def test_write_html():
     game = gbt.Game.new_table([2, 2])
+    game.players[0].label = "Alice"
+    game.players[1].label = "Bob"
     serialized_game = game.to_html()
     assert isinstance(serialized_game, str)
+    assert "Alice" in serialized_game
+    assert "Bob" in serialized_game
 
 
 def test_write_latex():