Retrieve updatable packages

1 files changed, 76 insertions, 0 deletions

diff --git a/src/component.cpp b/src/component.cpp
new file mode 100644
index 0000000..9247a1d
--- /dev/null
+++ b/src/component.cpp
@@ -0,0 +1,76 @@
+#include <ftxui/component/screen_interactive.hpp>
+#include "component.h"
+
+namespace katja
+{
+    PackageList::PackageList(const std::vector<std::string>& header, const std::vector<std::vector<std::string>>& data)
+        : m_data(data), m_header(header)
+    {
+    }
+
+    ftxui::Element PackageList::Render()
+    {
+        std::vector<std::vector<std::string>> data{ m_header };
+
+        std::size_t dimy = ftxui::ScreenInteractive::Active()->dimy();
+        if (dimy == 0)
+        {
+            dimy = ftxui::Terminal::Size().dimy;
+        }
+        if (dimy > 4) // 4 = headers and borders.
+        {
+            std::size_t row_count = std::min(m_data.size() - top_line, dimy - 4 + top_line);
+
+            std::copy(m_data.cbegin() + top_line, m_data.cbegin() + row_count, std::back_inserter(data));
+        }
+        ftxui::Table table{ data };
+        table.SelectAll().Border(ftxui::LIGHT);
+
+        // Add border around the first column.
+        table.SelectColumn(0).Border(ftxui::LIGHT);
+
+        // Make first row bold with a double border.
+        table.SelectRow(0).Decorate(ftxui::bold);
+        table.SelectRow(0).SeparatorVertical(ftxui::LIGHT);
+        table.SelectRow(0).Border(ftxui::DOUBLE);
+
+        // Align right the "Release date" column.
+        table.SelectColumn(2).DecorateCells(ftxui::align_right);
+
+        // Select row from the second to the last.
+        auto content = table.SelectRows(1, -1);
+        // Alternate in between 3 colors.
+        content.DecorateCellsAlternateRow(color(ftxui::Color::Blue), 3, 0);
+        content.DecorateCellsAlternateRow(color(ftxui::Color::Cyan), 3, 1);
+        content.DecorateCellsAlternateRow(color(ftxui::Color::White), 3, 2);
+
+        return table.Render();
+    }
+
+    bool PackageList::OnEvent(ftxui::Event event)
+    {
+        if (event == ftxui::Event::Character('q') || event == ftxui::Event::Escape)
+        {
+            event.screen_->ExitLoopClosure()();
+        }
+        else if (event == ftxui::Event::Character('j') || event == ftxui::Event::ArrowDown)
+        {
+            if (m_data.size() > 0 && top_line < (m_data.size() - 1))
+            {
+                ++top_line;
+            }
+        }
+        else if (event == ftxui::Event::Character('k') || event == ftxui::Event::ArrowUp)
+        {
+            if (top_line > 0)
+            {
+                --top_line;
+            }
+        }
+        else
+        {
+            return false;
+        }
+        return true;
+    }
+}