GTableView: Add ability to hide individual columns at view-level.

Use this in IRCClient to hide the "sender" column in the server message view
since everything in that view comes from the "Server" anyway.

Applications/IRCClient/IRCClient.cpp

@@ -246,7 +246,7 @@ void IRCClient::handle(const Message& msg, const String&)
 
 void IRCClient::add_server_message(const String& text)
 {
-    m_log->add_message(0, "Server", text);
+    m_log->add_message(0, "", text);
     m_server_subwindow->did_add_message();
 }
 
@@ -354,7 +354,7 @@ void IRCClient::handle_ping(const Message& msg)
 {
     if (msg.arguments.size() < 0)
         return;
-    m_log->add_message(0, "Server", "Ping? Pong!");
+    m_log->add_message(0, "", "Ping? Pong!");
     send_pong(msg.arguments[0]);
 }
 

Applications/IRCClient/IRCLogBufferModel.cpp

@@ -60,6 +60,8 @@ GVariant IRCLogBufferModel::data(const GModelIndex& index, Role role) const
         }
     }
     if (role == Role::ForegroundColor) {
+        if (index.column() == Column::Timestamp)
+            return Color(Color::MidGray);
         if (index.column() == Column::Text)
             return m_log_buffer->at(index.row()).color;
     }

Applications/IRCClient/IRCWindow.cpp

@@ -26,6 +26,10 @@ IRCWindow::IRCWindow(IRCClient& client, void* owner, Type type, const String& na
     m_table_view->set_font(Font::default_fixed_width_font());
     m_table_view->set_alternating_row_colors(false);
 
+    if (m_type == Server) {
+        m_table_view->set_column_hidden(IRCLogBufferModel::Column::Name, true);
+    }
+
     if (m_type == Channel) {
         auto* member_view = new GTableView(container);
         member_view->set_headers_visible(false);

LibGUI/GTableView.cpp

@@ -63,9 +63,14 @@ int GTableView::column_width(int column_index) const
 
 Rect GTableView::header_rect(int column_index) const
 {
+    if (is_column_hidden(column_index))
+        return { };
     int x_offset = 0;
-    for (int i = 0; i < column_index; ++i)
+    for (int i = 0; i < column_index; ++i) {
+        if (is_column_hidden(i))
+            continue;
         x_offset += column_width(i) + horizontal_padding() * 2;
+    }
     auto column_metadata = m_model->column_metadata(column_index);
     int column_width = column_metadata.preferred_width;
     return { x_offset, 0, column_width + horizontal_padding() * 2, header_height() };
@@ -137,6 +142,8 @@ void GTableView::paint_event(GPaintEvent& event)
 
         int x_offset = 0;
         for (int column_index = 0; column_index < m_model->column_count(); ++column_index) {
+            if (is_column_hidden(column_index))
+                continue;
             auto column_metadata = m_model->column_metadata(column_index);
             int column_width = column_metadata.preferred_width;
             const Font& font = column_metadata.font ? *column_metadata.font : this->font();
@@ -192,6 +199,8 @@ void GTableView::paint_headers(Painter& painter)
     painter.draw_line({ 0, header_height() - 1 }, { exposed_width - 1, header_height() - 1 }, Color::DarkGray);
     int x_offset = 0;
     for (int column_index = 0; column_index < m_model->column_count(); ++column_index) {
+        if (is_column_hidden(column_index))
+            continue;
         auto column_metadata = m_model->column_metadata(column_index);
         int column_width = column_metadata.preferred_width;
         bool is_key_column = m_model->key_column() == column_index;
@@ -277,3 +286,22 @@ void GTableView::scroll_into_view(const GModelIndex& index, Orientation orientat
     auto rect = row_rect(index.row()).translated(0, -header_height());
     GScrollableWidget::scroll_into_view(rect, orientation);
 }
+
+bool GTableView::is_column_hidden(int column) const
+{
+    if (column >= 0 && column < m_column_visibility.size())
+        return !m_column_visibility[column];
+    return false;
+}
+
+void GTableView::set_column_hidden(int column, bool hidden)
+{
+    ASSERT(column >= 0);
+    if (m_column_visibility.size() <= column) {
+        int previous_column_count = m_column_visibility.size();
+        m_column_visibility.resize(column + 1);
+        for (int i = previous_column_count; i < m_column_visibility.size(); ++i)
+            m_column_visibility[i] = true;
+    }
+    m_column_visibility[column] = !hidden;
+}

LibGUI/GTableView.h

@@ -35,6 +35,9 @@ public:
 
     void scroll_into_view(const GModelIndex&, Orientation);
 
+    bool is_column_hidden(int) const;
+    void set_column_hidden(int, bool);
+
 private:
     virtual void model_notification(const GModelNotification&);
 
@@ -49,6 +52,7 @@ private:
     int column_width(int) const;
     void update_content_size();
 
+    Vector<bool> m_column_visibility;
     RetainPtr<GTableModel> m_model;
     int m_horizontal_padding { 5 };
     bool m_headers_visible { true };