Add source code.

src/Table.cpp

@@ -0,0 +1,57 @@
+#include "Table.h"
+
+#include <algorithm>
+
+#include "StringUtil.h"
+
+TextTable::TextTable(const std::vector<std::string>& headers) : headers_(headers) {}
+
+void TextTable::addRow(const std::vector<std::string>& cells) {
+    std::vector<std::string> row = cells;
+    row.resize(headers_.size());
+    rows_.push_back(row);
+}
+
+std::size_t TextTable::rowCount() const {
+    return rows_.size();
+}
+
+std::string TextTable::render() const {
+    std::vector<std::size_t> widths;
+    for (const std::string& header : headers_) {
+        widths.push_back(StringUtil::displayWidth(header));
+    }
+    for (const std::vector<std::string>& row : rows_) {
+        for (std::size_t c = 0; c < row.size(); ++c) {
+            widths[c] = std::max(widths[c], StringUtil::displayWidth(row[c]));
+        }
+    }
+
+    auto formatLine = [&widths](const std::vector<std::string>& cells) {
+        std::string line;
+        for (std::size_t c = 0; c < cells.size(); ++c) {
+            if (c > 0) {
+                line += " | ";
+            }
+            line += cells[c];
+            line.append(widths[c] - StringUtil::displayWidth(cells[c]), ' ');
+        }
+        return line + "\n";
+    };
+
+    std::string out = formatLine(headers_);
+    for (std::size_t c = 0; c < widths.size(); ++c) {
+        if (c > 0) {
+            out += "-+-";
+        }
+        out.append(widths[c], '-');
+    }
+    out += "\n";
+    for (const std::vector<std::string>& row : rows_) {
+        out += formatLine(row);
+    }
+    if (rows_.empty()) {
+        out += "(none)\n";
+    }
+    return out;
+}