refactor: Separate render component

include/components/bar.hpp

@@ -2,7 +2,6 @@
 
 #include "common.hpp"
 #include "components/config.hpp"
-#include "components/logger.hpp"
 #include "components/types.hpp"
 #include "utils/concurrency.hpp"
 #include "utils/throttle.hpp"
@@ -15,11 +14,12 @@ POLYBAR_NS
 
 // fwd
 class tray_manager;
-class font_manager;
+class logger;
+class renderer;
 
 class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::property_notify> {
  public:
-  explicit bar(connection& conn, const config& config, const logger& logger, unique_ptr<font_manager> font_manager,
+  explicit bar(connection& conn, const config& config, const logger& logger,
       unique_ptr<tray_manager> tray_manager);
   ~bar();
 
@@ -32,14 +32,9 @@ class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::propert
   void parse(string data, bool force = false);
 
  protected:
-  void flush();
   void refresh_window();
-  void load_fonts();
-  void configure_geom();
   void create_monitor();
-  void create_window();
+  void configure_geom();
-  void create_pixmap();
-  void create_gcontexts();
   void restack_window();
   void map_window();
   void set_wmhints();
@@ -51,62 +46,35 @@ class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::propert
   void handle(const evt::expose& evt);
   void handle(const evt::property_notify& evt);
 
-  void on_alignment_change(alignment align);
+  void on_alignment_change(const alignment align);
-  void on_attribute_set(attribute attr);
+  void on_attribute_set(const attribute attr);
-  void on_attribute_unset(attribute attr);
+  void on_attribute_unset(const attribute attr);
-  void on_attribute_toggle(attribute attr);
+  void on_attribute_toggle(const attribute attr);
-  void on_action_block_open(mousebtn btn, string cmd);
+  void on_action_block_open(const mousebtn btn, string cmd);
-  void on_action_block_close(mousebtn btn);
+  void on_action_block_close(const mousebtn btn);
-  void on_color_change(gc gc_, color color_);
+  void on_color_change(const gc gc_, uint32_t color);
   void on_font_change(int index);
   void on_pixel_offset(int px);
   void on_tray_report(uint16_t slots);
 
-  void draw_background();
-  void draw_border(border border_);
-  void draw_lines(int x, int w);
-  int draw_shift(int x, int chr_width);
-  void draw_character(uint16_t character);
-  void draw_textstring(const char* text, size_t len);
-
  private:
   connection& m_connection;
   const config& m_conf;
   const logger& m_log;
-  unique_ptr<font_manager> m_fontmanager;
   unique_ptr<tray_manager> m_tray;
-
+  unique_ptr<renderer> m_renderer;
-  concurrency_util::spin_lock m_lock;
-  throttle_util::throttle_t m_throttler;
-
-  xcb_screen_t* m_screen;
-  rect m_screensize{};
-
-  xcb_visualtype_t* m_visual;
-
-  window m_window{m_connection, m_connection.generate_id()};
-  colormap m_colormap{m_connection, m_connection.generate_id()};
-  pixmap m_pixmap{m_connection, m_connection.generate_id()};
-
-  // xcb_gcontext_t m_root_gc{0};
-  // graphics_util::root_pixmap m_rootpixmap;
 
   bar_settings m_opts;
-  map<border, border_settings> m_borders;
+  xcb_window_t m_window;
-  map<gc, gcontext> m_gcontexts;
+  xcb_screen_t* m_screen;
-  vector<action_block> m_actions;
+  size m_screensize{};
+  bool m_sinkattached{false};
+  string m_lastinput;
 
-  stateflag m_sinkattached{false};
+  alignment m_trayalign{alignment::NONE};
+  uint8_t m_trayclients{0};
 
-  alignment m_traypos{alignment::NONE};
+  std::mutex m_mutex;
-  uint16_t m_trayclients{0};
-
-  string m_prevdata;
-  int m_xpos{0};
-  int m_attributes{0};
-
-  xcb_font_t m_gcfont{0};
-  XftDraw* m_xftdraw;
 };
 
 di::injector<unique_ptr<bar>> configure_bar();

include/components/parser.hpp

@@ -1,22 +1,25 @@
 #pragma once
 
 #include "common.hpp"
-#include "components/signals.hpp"
 
 POLYBAR_NS
 
+struct bar_settings;
+enum class attribute : uint8_t;
+enum class mousebtn : uint8_t;
+
 DEFINE_ERROR(unrecognized_token);
 
 class parser {
  public:
-  explicit parser(const bar_settings& bar) : m_bar(bar) {}
+  explicit parser(const bar_settings& bar);
   void operator()(string data);
   void codeblock(string data);
   size_t text(string data);
 
  protected:
-  color parse_color(string s, color fallback = color{0});
+  uint32_t parse_color(string s, uint32_t fallback = 0);
-  int parse_fontindex(string s);
+  int8_t parse_fontindex(string s);
   attribute parse_attr(const char s);
   mousebtn parse_action_btn(string data);
   string parse_action_cmd(string data);

include/components/renderer.hpp

@@ -0,0 +1,83 @@
+#pragma once
+
+#include "common.hpp"
+#include "components/types.hpp"
+#include "x11/types.hpp"
+
+POLYBAR_NS
+
+class connection;
+class font_manager;
+class logger;
+
+class renderer {
+ public:
+  explicit renderer(connection& conn, const logger& logger, unique_ptr<font_manager> font_manager,
+      const bar_settings& bar, const vector<string>& fonts);
+
+  xcb_window_t window() const;
+
+  void begin();
+  void end();
+  void redraw();
+
+  void reserve_space(edge side, uint16_t w);
+
+  void set_background(const gc gcontext, const uint32_t color);
+  void set_foreground(const gc gcontext, const uint32_t color);
+  void set_fontindex(const uint8_t font);
+  void set_alignment(const alignment align);
+  void set_attribute(const attribute attr, const bool state);
+
+  void fill_background();
+  void fill_border(const map<edge, border_settings>& borders, edge border);
+  void fill_overline(int16_t x, uint16_t w);
+  void fill_underline(int16_t x, uint16_t w);
+
+  void draw_character(uint16_t character);
+  void draw_textstring(const char* text, size_t len);
+
+  int16_t shift_content(int16_t x, int16_t shift_x);
+  int16_t shift_content(int16_t shift_x);
+
+  void begin_action(const mousebtn btn, const string& cmd);
+  void end_action(const mousebtn btn);
+  const vector<action_block> get_actions();
+
+ protected:
+  void debughints();
+
+ private:
+  connection& m_connection;
+  const logger& m_log;
+  unique_ptr<font_manager> m_fontmanager;
+
+  const bar_settings& m_bar;
+
+  xcb_window_t m_window;
+  xcb_colormap_t m_colormap;
+  xcb_visualtype_t* m_visual;
+  // xcb_gcontext_t m_gcontext;
+  xcb_pixmap_t m_pixmap;
+
+  map<gc, xcb_gcontext_t> m_gcontexts;
+  map<alignment, xcb_pixmap_t> m_pixmaps;
+  vector<action_block> m_actions;
+
+  // bool m_autosize{false};
+  int m_currentx{0};
+  int m_attributes{0};
+  alignment m_alignment{alignment::NONE};
+
+  xcb_font_t m_gcfont{0};
+
+  uint32_t m_background{0};
+  uint32_t m_foreground{0};
+
+  edge m_reserve_at{edge::NONE};
+  uint16_t m_reserve;
+};
+
+di::injector<unique_ptr<renderer>> configure_renderer(const bar_settings& bar, const vector<string>& fonts);
+
+POLYBAR_NS_END

include/components/signals.hpp

@@ -8,12 +8,11 @@ POLYBAR_NS
 
 // fwd decl {{{
 
-enum class mousebtn;
+enum class mousebtn : uint8_t;
-enum class syntaxtag;
+enum class syntaxtag : uint8_t;
-enum class alignment;
+enum class alignment : uint8_t;
-enum class attribute;
+enum class attribute : uint8_t;
-enum class gc;
+enum class gc : uint8_t;
-class color;
 
 // }}}
 
@@ -23,27 +22,26 @@ class color;
 namespace g_signals {
   namespace bar {
     extern callback<string> action_click;
-    extern callback<bool> visibility_change;
+    extern callback<const bool> visibility_change;
   }
 
   namespace parser {
-    extern callback<alignment> alignment_change;
+    extern callback<const alignment> alignment_change;
-    extern callback<attribute> attribute_set;
+    extern callback<const attribute> attribute_set;
-    extern callback<attribute> attribute_unset;
+    extern callback<const attribute> attribute_unset;
-    extern callback<attribute> attribute_toggle;
+    extern callback<const mousebtn, string> action_block_open;
-    extern callback<mousebtn, string> action_block_open;
+    extern callback<const mousebtn> action_block_close;
-    extern callback<mousebtn> action_block_close;
+    extern callback<const gc, const uint32_t> color_change;
-    extern callback<gc, color> color_change;
+    extern callback<const int8_t> font_change;
-    extern callback<int> font_change;
+    extern callback<const int16_t> pixel_offset;
-    extern callback<int> pixel_offset;
+    extern callback<const uint16_t> ascii_text_write;
-    extern callback<uint16_t> ascii_text_write;
+    extern callback<const uint16_t> unicode_text_write;
-    extern callback<uint16_t> unicode_text_write;
+    extern callback<const char*, const size_t> string_write;
-    extern callback<const char*, size_t> string_write;
   }
 
   namespace tray {
-    extern callback<uint16_t> report_slotcount;
+    extern callback<const uint16_t> report_slotcount;
-    extern callback<uint32_t> clear_bg;
+    extern callback<const uint32_t> clear_bg;
   }
 }
 

include/components/types.hpp

@@ -6,19 +6,13 @@
 
 POLYBAR_NS
 
-enum class border { NONE = 0, TOP, BOTTOM, LEFT, RIGHT, ALL };
+enum class edge : uint8_t { NONE = 0, TOP, BOTTOM, LEFT, RIGHT, ALL };
-enum class alignment { NONE = 0, LEFT, CENTER, RIGHT };
+enum class alignment : uint8_t { NONE = 0, LEFT, CENTER, RIGHT };
-enum class syntaxtag { NONE = 0, A, B, F, T, U, O, R, o, u };
+enum class syntaxtag : uint8_t { NONE = 0, A, B, F, T, U, O, R, o, u };
-enum class attribute { NONE = 0, o = 2, u = 4 };
+enum class attribute : uint8_t { NONE = 0, o = 1 << 0, u = 1 << 1 };
-enum class mousebtn { NONE = 0, LEFT, MIDDLE, RIGHT, SCROLL_UP, SCROLL_DOWN };
+enum class mousebtn : uint8_t { NONE = 0, LEFT, MIDDLE, RIGHT, SCROLL_UP, SCROLL_DOWN };
-enum class gc { NONE = 0, BG, FG, OL, UL, BT, BB, BL, BR };
+enum class gc : uint8_t { NONE = 0, BG, FG, OL, UL, BT, BB, BL, BR };
-
+enum class strut : uint16_t {
-struct rect {
-  uint16_t w{0};
-  uint16_t h{0};
-};
-
-enum class strut {
   LEFT = 0,
   RIGHT,
   TOP,
@@ -33,80 +27,73 @@ enum class strut {
   BOTTOM_END_X,
 };
 
-struct strut_margins {
+struct position {
-  uint16_t t;
-  uint16_t b;
-  uint16_t l;
-  uint16_t r;
-};
-
-struct bar_settings {
-  bar_settings() = default;
-
-  string locale;
-
   int16_t x{0};
   int16_t y{0};
-  uint16_t width{0};
+};
-  uint16_t height{0};
 
-  int16_t offset_y{0};
+struct size {
-  int16_t offset_x{0};
+  uint16_t w{0};
+  uint16_t h{0};
+};
 
-  uint16_t padding_left{0};
+struct side_values {
-  uint16_t padding_right{0};
+  uint16_t left{0};
+  uint16_t right{0};
+};
 
-  int16_t module_margin_left{0};
+struct edge_values {
-  int16_t module_margin_right{2};
+  uint16_t left{0};
-
+  uint16_t right{0};
-  int16_t lineheight{0};
+  uint16_t top{0};
-  int16_t spacing{1};
+  uint16_t bottom{0};
-  string separator;
-
-  color background{g_colorwhite};
-  color foreground{g_colorblack};
-  color linecolor{g_colorblack};
-
-  alignment align{alignment::RIGHT};
-
-  bool bottom{false};
-  bool dock{false};
-
-  monitor_t monitor;
-  string wmname;
-
-  int16_t vertical_mid{0};
-
-  strut_margins margins;
-
-  string geom() {
-    char buffer[32]{
-        '\0',
-    };
-    snprintf(buffer, sizeof(buffer), "%dx%d+%d+%d", width, height, x, y);
-    return string{*buffer};
-  }
 };
 
 struct border_settings {
-  border_settings() = default;
+  uint32_t color{0xFF000000};
-  polybar::color color{g_colorblack};
   uint16_t size{0};
 };
 
+struct bar_settings {
+  monitor_t monitor;
+
+  edge origin{edge::BOTTOM};
+
+  size size{0, 0};
+  position pos{0, 0};
+  position offset{0, 0};
+  position center{0, 0};
+  side_values padding{0, 0};
+  side_values margin{0, 0};
+  side_values module_margin{0, 2};
+  edge_values strut{0, 0, 0, 0};
+
+  uint32_t background{0xFFFFFFFF};
+  uint32_t foreground{0xFF0000FF};
+  uint32_t linecolor{0xFF000000};
+
+  map<edge, border_settings> borders;
+
+  int8_t lineheight{0};
+  int8_t spacing{1};
+  string separator;
+
+  string wmname;
+  string locale;
+
+  bool force_docking{false};
+};
+
 struct action_block {
-  action_block() = default;
+  alignment align{alignment::NONE};
-  mousebtn button{mousebtn::NONE};
-  string command;
   int16_t start_x{0};
   int16_t end_x{0};
-  alignment align;
+  mousebtn button{mousebtn::NONE};
+  string command;
   bool active{true};
 #if DEBUG and DRAW_CLICKABLE_AREA_HINTS
-  xcb_window_t clickable_area;
+  xcb_window_t hint;
 #endif
 };
 
-struct wmsettings_bspwm {};
-
 POLYBAR_NS_END

include/utils/color.hpp

@@ -54,7 +54,7 @@ namespace color_util {
     return (a << 24) | (r << 16) | (g << 8) | b;
   }
 
-  template <typename T = uint8_t>
+  template <typename T>
   string hex(uint32_t color) {
     char s[12];
     size_t len = 0;
@@ -85,9 +85,9 @@ namespace color_util {
     return hex;
   }
 
-  inline uint32_t parse(string hex) {
+  inline uint32_t parse(string hex, uint32_t fallback = 0) {
     if ((hex = parse_hex(hex)).empty())
-      return 0U;
+      return fallback;
     return std::strtoul(&hex[1], nullptr, 16);
   }
 }

include/x11/fonts.hpp

@@ -42,36 +42,40 @@ class font_manager {
   explicit font_manager(connection& conn, const logger& logger);
   ~font_manager();
 
-  void set_preferred_font(int index);
+  bool load(string name, int8_t fontindex = -1, int8_t offset_y = 0);
 
-  bool load(string name, int fontindex = -1, int offset_y = 0);
+  void set_preferred_font(int8_t index);
 
   font_t& match_char(uint16_t chr);
-
+  uint8_t char_width(font_t& font, uint16_t chr);
-  int char_width(font_t& font, uint16_t chr);
 
   XftColor xftcolor();
+  XftDraw* xftdraw();
+  XftDraw* create_xftdraw(xcb_pixmap_t pm, xcb_colormap_t cm);
+  void destroy_xftdraw();
 
+  void allocate_color(uint32_t color, bool initial_alloc = false);
   void allocate_color(XRenderColor color, bool initial_alloc = false);
 
-  void set_gcontext_font(gcontext& gc, xcb_font_t font);
+  void set_gcontext_font(xcb_gcontext_t gc, xcb_font_t font);
 
  protected:
   bool open_xcb_font(font_t& fontptr, string fontname);
-
   bool has_glyph(font_t& font, uint16_t chr);
 
  private:
   connection& m_connection;
   const logger& m_logger;
 
-  Display* m_display = nullptr;
+  Display* m_display{nullptr};
-  Visual* m_visual = nullptr;
+  Visual* m_visual{nullptr};
-  Colormap m_colormap;
+  Colormap m_colormap{};
 
-  map<int, font_t> m_fonts;
+  map<uint8_t, font_t> m_fonts;
-  int m_fontindex = -1;
+  int8_t m_fontindex{-1};
-  XftColor m_xftcolor;
+
+  XftColor m_xftcolor{};
+  XftDraw* m_xftdraw{nullptr};
 };
 
 di::injector<unique_ptr<font_manager>> configure_font_manager();

src/components/builder.cpp

@@ -248,7 +248,7 @@ void builder::font_close(bool force) {
 void builder::background(string color) {
   if (color.length() == 2 || (color.find("#") == 0 && color.length() == 3)) {
     color = "#" + color.substr(color.length() - 2);
-    auto bg = m_bar.background.source();
+    auto bg = color_util::hex<uint16_t>(m_bar.background);
     color += bg.substr(bg.length() - (bg.length() < 6 ? 3 : 6));
   } else if (color.length() >= 7 && color == "#" + string(color.length() - 1, color[1])) {
     color = color.substr(0, 4);
@@ -279,7 +279,7 @@ void builder::color(string color_) {
   auto color(color_);
   if (color.length() == 2 || (color.find("#") == 0 && color.length() == 3)) {
     color = "#" + color.substr(color.length() - 2);
-    auto fg = m_bar.foreground.source();
+    auto fg = color_util::hex<uint16_t>(m_bar.foreground);
     color += fg.substr(fg.length() - (fg.length() < 6 ? 3 : 6));
   } else if (color.length() >= 7 && color == "#" + string(color.length() - 1, color[1])) {
     color = color.substr(0, 4);
@@ -299,7 +299,7 @@ void builder::color(string color_) {
 
 void builder::color_alpha(string alpha_) {
   auto alpha(alpha_);
-  string val = m_bar.foreground.source();
+  string val = color_util::hex<uint16_t>(m_bar.foreground);
   if (alpha.find("#") == std::string::npos) {
     alpha = "#" + alpha;
   }

src/components/controller.cpp

@@ -2,11 +2,13 @@
 #include <csignal>
 #include <mutex>
 
-#include "x11/color.hpp"
 #include "components/bar.hpp"
-
+#include "components/config.hpp"
 #include "components/controller.hpp"
-
+#include "components/eventloop.hpp"
+#include "components/ipc.hpp"
+#include "components/logger.hpp"
+#include "components/signals.hpp"
 #include "modules/backlight.hpp"
 #include "modules/battery.hpp"
 #include "modules/bspwm.hpp"
@@ -22,12 +24,6 @@
 #include "modules/text.hpp"
 #include "modules/xbacklight.hpp"
 #include "modules/xwindow.hpp"
-
-#include "components/config.hpp"
-#include "components/eventloop.hpp"
-#include "components/ipc.hpp"
-#include "components/logger.hpp"
-#include "components/signals.hpp"
 #include "utils/process.hpp"
 #include "utils/string.hpp"
 
@@ -44,7 +40,7 @@
 #include "modules/volume.hpp"
 #endif
 
-#if not (ENABLE_I3 && ENABLE_MPD && ENABLE_NETWORK && ENABLE_ALSA)
+#if not(ENABLE_I3 && ENABLE_MPD && ENABLE_NETWORK && ENABLE_ALSA)
 #include "modules/unsupported.hpp"
 #endif
 
@@ -499,14 +495,16 @@ void controller::on_unrecognized_action(string input) {
  * Callback for module content update
  */
 void controller::on_update() {
+  const bar_settings& bar{m_bar->settings()};
+
   string contents{""};
-  string separator{m_bar->settings().separator};
+  string separator{bar.separator};
 
-  string padding_left(m_bar->settings().padding_left, ' ');
+  string padding_left(bar.padding.left, ' ');
-  string padding_right(m_bar->settings().padding_right, ' ');
+  string padding_right(bar.padding.right, ' ');
 
-  auto margin_left = m_bar->settings().module_margin_left;
+  auto margin_left = bar.module_margin.left;
-  auto margin_right = m_bar->settings().module_margin_right;
+  auto margin_right = bar.module_margin.right;
 
   for (const auto& block : m_eventloop->modules()) {
     string block_contents;

src/components/parser.cpp

@@ -1,12 +1,13 @@
-#include "x11/color.hpp"
-#include "components/types.hpp"
-
 #include "components/parser.hpp"
+#include "components/signals.hpp"
+#include "components/types.hpp"
 #include "utils/math.hpp"
 #include "utils/string.hpp"
 
 POLYBAR_NS
 
+parser::parser(const bar_settings& bar) : m_bar(bar) {}
+
 /**
  * Parse input data
  */
@@ -111,11 +112,6 @@ void parser::codeblock(string data) {
           g_signals::parser::attribute_unset(parse_attr(value[0]));
         break;
 
-      case '!':
-        if (g_signals::parser::attribute_toggle)
-          g_signals::parser::attribute_toggle(parse_attr(value[0]));
-        break;
-
       case 'A':
         if (isdigit(data[0]) || data[0] == ':') {
           value = parse_action_cmd(data);
@@ -172,8 +168,7 @@ size_t parser::text(string data) {
     return 2;
   } else if ((utf[0] & 0xf0) == 0xe0) {  // 3 byte utf-8 sequence
     if (g_signals::parser::unicode_text_write)
-      g_signals::parser::unicode_text_write(
+      g_signals::parser::unicode_text_write((utf[0] & 0xf) << 12 | (utf[1] & 0x3f) << 6 | (utf[2] & 0x3f));
-          (utf[0] & 0xf) << 12 | (utf[1] & 0x3f) << 6 | (utf[2] & 0x3f));
     return 3;
   } else if ((utf[0] & 0xf8) == 0xf0) {  // 4 byte utf-8 sequence
     if (g_signals::parser::unicode_text_write)
@@ -197,20 +192,26 @@ size_t parser::text(string data) {
 /**
  * TODO: docstring
  */
-color parser::parse_color(string s, color fallback) {
+uint32_t parser::parse_color(string s, uint32_t fallback) {
-  if (s.empty() || s == "-")
+  uint32_t color{0};
+  if (s.empty() || s[0] == '-' || (color = color_util::parse(s, fallback)) == fallback)
     return fallback;
-  return color::parse(s, fallback);
+  return color_util::premultiply_alpha(color);
 }
 
 /**
  * TODO: docstring
  */
-int parser::parse_fontindex(string s) {
+int8_t parser::parse_fontindex(string s) {
-  if (s.empty() || s == "-")
+  if (s.empty() || s == "-") {
     return -1;
-  char* p = (char*)s.c_str();
+  }
-  return std::strtoul(p, &p, 10);
+
+  try {
+    return std::stoul(s.c_str(), nullptr, 10);
+  } catch (const std::invalid_argument& err) {
+    return -1;
+  }
 }
 
 /**
@@ -246,8 +247,11 @@ mousebtn parser::parse_action_btn(string data) {
  * TODO: docstring
  */
 string parser::parse_action_cmd(string data) {
-  auto start = string_util::find_nth(data, 0, ":", 1);
+  size_t start, end;
-  auto end = string_util::find_nth(data, 0, ":", 2);
+  if ((start = data.find(':')) == string::npos)
+    return "";
+  if ((end = data.find(':', start + 1)) == string::npos)
+    return "";
   return string_util::trim(data.substr(start, end), ':');
 }
 

src/components/renderer.cpp

@@ -0,0 +1,499 @@
+#include "components/renderer.hpp"
+#include "components/logger.hpp"
+#include "x11/connection.hpp"
+#include "x11/draw.hpp"
+#include "x11/fonts.hpp"
+#include "x11/winspec.hpp"
+
+POLYBAR_NS
+
+/**
+ * Configure injection module
+ */
+di::injector<unique_ptr<renderer>> configure_renderer(const bar_settings& bar, const vector<string>& fonts) {
+  // clang-format off
+  return di::make_injector(
+      di::bind<>().to(bar),
+      di::bind<>().to(fonts),
+      configure_connection(),
+      configure_logger(),
+      configure_font_manager());
+  // clang-format on
+}
+
+renderer::renderer(connection& conn, const logger& logger, unique_ptr<font_manager> font_manager,
+    const bar_settings& bar, const vector<string>& fonts)
+    : m_connection(conn), m_log(logger), m_fontmanager(forward<decltype(font_manager)>(font_manager)), m_bar(bar) {
+  auto screen = m_connection.screen();
+
+  m_log.trace("bar: Get true color visual");
+  m_visual = m_connection.visual_type(screen, 32).get();
+
+  m_log.trace("bar: Create colormap");
+  m_colormap = m_connection.generate_id();
+  m_connection.create_colormap(XCB_COLORMAP_ALLOC_NONE, m_colormap, screen->root, m_visual->visual_id);
+
+  m_window = m_connection.generate_id();
+  m_log.trace("bar: Create window %s", m_connection.id(m_window));
+  {
+    uint32_t mask{0};
+    uint32_t values[16]{0};
+    xcb_params_cw_t params;
+
+    // clang-format off
+    XCB_AUX_ADD_PARAM(&mask, &params, back_pixel, 0);
+    XCB_AUX_ADD_PARAM(&mask, &params, border_pixel, 0);
+    XCB_AUX_ADD_PARAM(&mask, &params, backing_store, XCB_BACKING_STORE_WHEN_MAPPED);
+    XCB_AUX_ADD_PARAM(&mask, &params, colormap, m_colormap);
+    XCB_AUX_ADD_PARAM(&mask, &params, override_redirect, m_bar.force_docking);
+    XCB_AUX_ADD_PARAM(&mask, &params, event_mask, XCB_EVENT_MASK_PROPERTY_CHANGE | XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS);
+    // clang-format on
+
+    xutils::pack_values(mask, &params, values);
+    m_connection.create_window(32, m_window, screen->root, m_bar.pos.x, m_bar.pos.y, m_bar.size.w, m_bar.size.h, 0,
+        XCB_WINDOW_CLASS_INPUT_OUTPUT, m_visual->visual_id, mask, values);
+  }
+
+  m_pixmap = m_connection.generate_id();
+  m_log.trace("bar: Create pixmap (xid=%s)", m_connection.id(m_pixmap));
+  m_connection.create_pixmap(32, m_pixmap, m_window, m_bar.size.w, m_bar.size.h);
+
+  m_log.trace("bar: Create gcontexts");
+  {
+    // clang-format off
+    vector<uint32_t> colors {
+      m_bar.background,
+      m_bar.foreground,
+      m_bar.linecolor,
+      m_bar.linecolor,
+      m_bar.borders.at(edge::TOP).color,
+      m_bar.borders.at(edge::BOTTOM).color,
+      m_bar.borders.at(edge::LEFT).color,
+      m_bar.borders.at(edge::RIGHT).color,
+    };
+    // clang-format on
+
+    for (int i = 1; i <= 8; i++) {
+      uint32_t mask{0};
+      uint32_t value_list[32]{0};
+
+      xcb_params_gc_t params;
+      XCB_AUX_ADD_PARAM(&mask, &params, foreground, colors[i - 1]);
+      XCB_AUX_ADD_PARAM(&mask, &params, graphics_exposures, 0);
+
+      xutils::pack_values(mask, &params, value_list);
+      m_gcontexts.emplace(gc(i), m_connection.generate_id());
+
+      m_log.trace("bar: Create gcontext (gc=%i, xid=%s)", i, m_connection.id(m_gcontexts.at(gc(i))));
+      m_connection.create_gc(m_gcontexts.at(gc(i)), m_pixmap, mask, value_list);
+    }
+  }
+
+  m_log.trace("bar: Load fonts");
+  {
+    auto fonts_loaded = false;
+    auto fontindex = 0;
+
+    if (fonts.empty())
+      m_log.warn("No fonts specified, using fallback font \"fixed\"");
+
+    for (auto f : fonts) {
+      fontindex++;
+      vector<string> fd = string_util::split(f, ';');
+      string pattern{fd[0]};
+      int offset{0};
+
+      if (fd.size() > 1)
+        offset = std::stoi(fd[1], 0, 10);
+
+      if (m_fontmanager->load(pattern, fontindex, offset))
+        fonts_loaded = true;
+      else
+        m_log.warn("Unable to load font '%s'", fd[0]);
+    }
+
+    if (!fonts_loaded && !fonts.empty())
+      m_log.warn("Unable to load fonts, using fallback font \"fixed\"");
+
+    if (!fonts_loaded && !m_fontmanager->load("fixed"))
+      throw application_error("Unable to load fonts");
+
+    m_fontmanager->allocate_color(m_bar.foreground, true);
+  }
+}
+
+xcb_window_t renderer::window() const {
+  return m_window;
+}
+
+void renderer::begin() {
+#if DEBUG and DRAW_CLICKABLE_AREA_HINTS
+  for (auto&& action : m_actions) {
+    m_connection.destroy_window(action.hint);
+  }
+#endif
+
+  m_currentx = m_bar.borders.at(edge::LEFT).size;
+  m_attributes = 0;
+  m_actions.clear();
+
+  fill_background();
+
+  m_fontmanager->create_xftdraw(m_pixmap, m_colormap);
+}
+
+void renderer::end() {
+  xcb_rectangle_t rect{0, 0, m_bar.size.w, m_bar.size.h};
+
+  if (m_reserve_at == edge::LEFT) {
+    rect.x += m_reserve;
+    rect.width -= m_reserve;
+  } else if (m_reserve_at == edge::RIGHT) {
+    rect.width -= m_reserve;
+  }
+
+  fill_border(m_bar.borders, edge::ALL);
+
+  m_connection.copy_area(
+      m_pixmap, m_window, m_gcontexts.at(gc::FG), rect.x, rect.y, rect.x, rect.y, rect.width, rect.height);
+  m_connection.flush();
+
+  m_fontmanager->destroy_xftdraw();
+
+#ifdef DEBUG
+  debughints();
+#endif
+
+  m_reserve = 0;
+  m_reserve_at = edge::NONE;
+}
+
+void renderer::redraw() {}
+
+void renderer::reserve_space(edge side, uint16_t w) {
+  m_log.trace_x("renderer: reserve_space(%i, %i)", static_cast<uint8_t>(side), w);
+  m_reserve = w;
+  m_reserve_at = side;
+}
+
+void renderer::set_background(const gc gcontext, const uint32_t color) {
+  if (color == m_background)
+    return;
+  m_log.trace_x("renderer: set_background(%i, #%08x)", static_cast<uint8_t>(gcontext), color);
+  m_connection.change_gc(m_gcontexts.at(gcontext), XCB_GC_BACKGROUND, &color);
+  m_background = color;
+}
+
+void renderer::set_foreground(const gc gcontext, const uint32_t color) {
+  if (color == m_foreground)
+    return;
+  m_log.trace_x("renderer: set_foreground(%i, #%08x)", static_cast<uint8_t>(gcontext), color);
+  m_connection.change_gc(m_gcontexts.at(gcontext), XCB_GC_FOREGROUND, &color);
+  if (gcontext == gc::FG)
+    m_fontmanager->allocate_color(color);
+  else if (gcontext == gc::BG)
+    shift_content(0);
+  m_foreground = color;
+}
+
+void renderer::set_fontindex(const uint8_t font) {
+  m_log.trace_x("renderer: set_fontindex(%i)", static_cast<uint8_t>(font));
+  m_fontmanager->set_preferred_font(font);
+}
+
+void renderer::set_alignment(const alignment align) {
+  if (align == m_alignment) {
+    return;
+  } else if (align == alignment::LEFT) {
+    m_currentx = m_bar.borders.at(edge::LEFT).size;
+  } else if (align == alignment::RIGHT) {
+    m_currentx = m_bar.borders.at(edge::RIGHT).size;
+  } else {
+    m_currentx = 0;
+  }
+
+  if (align == alignment::LEFT && m_reserve_at == edge::LEFT) {
+    m_currentx += m_reserve;
+  } else if (align == alignment::RIGHT && m_reserve_at == edge::RIGHT) {
+    m_currentx += m_reserve;
+  }
+
+  m_log.trace_x("renderer: set_alignment(%i)", static_cast<uint8_t>(align));
+  m_alignment = align;
+}
+
+void renderer::set_attribute(const attribute attr, bool state) {
+  m_log.trace_x("renderer: set_attribute(%i, %i)", static_cast<uint8_t>(attr), state);
+
+  if (state) {
+    m_attributes |= static_cast<uint8_t>(attr);
+  } else {
+    m_attributes ^= static_cast<uint8_t>(attr);
+  }
+}
+
+void renderer::fill_background() {
+  xcb_rectangle_t rect{0, 0, m_bar.size.w, m_bar.size.h};
+
+  if (m_reserve_at == edge::LEFT) {
+    rect.x += m_reserve;
+    rect.width -= m_reserve;
+  } else if (m_reserve_at == edge::RIGHT) {
+    rect.width -= m_reserve;
+  }
+
+  draw_util::fill(m_connection, m_pixmap, m_gcontexts.at(gc::BG), rect.x, rect.y, rect.width, rect.height);
+}
+
+void renderer::fill_border(const map<edge, border_settings>& borders, edge border) {
+  for (auto&& b : borders) {
+    if (border != edge::ALL && b.first != border)
+      continue;
+    if (b.second.size <= 0)
+      continue;
+
+    switch (b.first) {
+      case edge::TOP:
+        draw_util::fill(m_connection, m_pixmap, m_gcontexts.at(gc::BT), borders.at(edge::LEFT).size, 0,
+            m_bar.size.w - borders.at(edge::LEFT).size - borders.at(edge::RIGHT).size, borders.at(edge::TOP).size);
+        break;
+      case edge::BOTTOM:
+        draw_util::fill(m_connection, m_pixmap, m_gcontexts.at(gc::BB), borders.at(edge::LEFT).size,
+            m_bar.size.h - borders.at(edge::BOTTOM).size,
+            m_bar.size.w - borders.at(edge::LEFT).size - borders.at(edge::RIGHT).size, borders.at(edge::BOTTOM).size);
+        break;
+      case edge::LEFT:
+        draw_util::fill(
+            m_connection, m_pixmap, m_gcontexts.at(gc::BL), 0, 0, borders.at(edge::LEFT).size, m_bar.size.h);
+        break;
+      case edge::RIGHT:
+        draw_util::fill(m_connection, m_pixmap, m_gcontexts.at(gc::BR), m_bar.size.w - borders.at(edge::RIGHT).size, 0,
+            borders.at(edge::RIGHT).size, m_bar.size.h);
+        break;
+
+      default:
+        break;
+    }
+  }
+}
+
+void renderer::fill_overline(int16_t x, uint16_t w) {
+  if (!m_bar.lineheight || !(m_attributes & static_cast<int>(attribute::o)))
+    return;
+
+  draw_util::fill(
+      m_connection, m_pixmap, m_gcontexts.at(gc::OL), x, m_bar.borders.at(edge::TOP).size, w, m_bar.lineheight);
+}
+
+void renderer::fill_underline(int16_t x, uint16_t w) {
+  if (!m_bar.lineheight || !(m_attributes & static_cast<int>(attribute::u)))
+    return;
+
+  draw_util::fill(m_connection, m_pixmap, m_gcontexts.at(gc::UL), x,
+      m_bar.size.h - m_bar.borders.at(edge::BOTTOM).size - m_bar.lineheight, w, m_bar.lineheight);
+}
+
+void renderer::draw_character(uint16_t character) {
+  auto& font = m_fontmanager->match_char(character);
+
+  if (!font) {
+    return;
+  }
+
+  if (font->ptr && font->ptr != m_gcfont) {
+    m_gcfont = font->ptr;
+    m_fontmanager->set_gcontext_font(m_gcontexts.at(gc::FG), m_gcfont);
+  }
+
+  auto width = m_fontmanager->char_width(font, character);
+
+  // Avoid odd glyph width's for center-aligned text
+  // since it breaks the positioning of clickable area's
+  if (m_alignment == alignment::CENTER && width % 2)
+    width++;
+
+  auto x = shift_content(width);
+  auto y = m_bar.center.y + font->height / 2 - font->descent + font->offset_y;
+
+  if (font->xft != nullptr) {
+    auto color = m_fontmanager->xftcolor();
+    XftDrawString16(m_fontmanager->xftdraw(), &color, font->xft, x, y, &character, 1);
+  } else {
+    uint16_t ucs = ((character >> 8) | (character << 8));
+    draw_util::xcb_poly_text_16_patched(m_connection, m_pixmap, m_gcontexts.at(gc::FG), x, y, 1, &ucs);
+  }
+}
+
+void renderer::draw_textstring(const char* text, size_t len) {
+  for (size_t n = 0; n < len; n++) {
+    vector<uint16_t> chars;
+    chars.emplace_back(text[n]);
+
+    auto& font = m_fontmanager->match_char(chars[0]);
+
+    if (!font) {
+      return;
+    }
+
+    if (font->ptr && font->ptr != m_gcfont) {
+      m_gcfont = font->ptr;
+      m_fontmanager->set_gcontext_font(m_gcontexts.at(gc::FG), m_gcfont);
+    }
+
+    while (n + 1 < len && text[n + 1] == chars[0]) {
+      chars.emplace_back(text[++n]);
+    }
+
+    // TODO: cache
+    auto width = m_fontmanager->char_width(font, chars[0]) * chars.size();
+
+    // Avoid odd glyph width's for center-aligned text
+    // since it breaks the positioning of clickable area's
+    if (m_alignment == alignment::CENTER && width % 2)
+      width++;
+
+    auto x = shift_content(width);
+    auto y = m_bar.center.y + font->height / 2 - font->descent + font->offset_y;
+
+    if (font->xft != nullptr) {
+      auto color = m_fontmanager->xftcolor();
+      const FcChar16* drawchars = static_cast<const FcChar16*>(chars.data());
+      XftDrawString16(m_fontmanager->xftdraw(), &color, font->xft, x, y, drawchars, chars.size());
+    } else {
+      for (size_t i = 0; i < chars.size(); i++) {
+        chars[i] = ((chars[i] >> 8) | (chars[i] << 8));
+      }
+
+      draw_util::xcb_poly_text_16_patched(
+          m_connection, m_pixmap, m_gcontexts.at(gc::FG), x, y, chars.size(), chars.data());
+    }
+  }
+}
+
+int16_t renderer::shift_content(int16_t x, int16_t shift_x) {
+  int delta = shift_x;
+
+  if (m_alignment == alignment::CENTER) {
+    int base_x = m_bar.size.w;
+    base_x -= m_bar.borders.at(edge::RIGHT).size;
+    base_x /= 2;
+    base_x += m_bar.borders.at(edge::LEFT).size;
+    m_connection.copy_area(
+        m_pixmap, m_pixmap, m_gcontexts.at(gc::FG), base_x - x / 2, 0, base_x - (x + shift_x) / 2, 0, x, m_bar.size.h);
+    x = base_x - (x + shift_x) / 2 + x;
+    delta /= 2;
+  } else if (m_alignment == alignment::RIGHT) {
+    m_connection.copy_area(m_pixmap, m_pixmap, m_gcontexts.at(gc::FG), m_bar.size.w - x, 0, m_bar.size.w - x - shift_x,
+        0, x, m_bar.size.h);
+    x = m_bar.size.w - shift_x - m_bar.borders.at(edge::RIGHT).size;
+    if (m_reserve_at == edge::RIGHT)
+      x -= m_reserve;
+  }
+
+  draw_util::fill(m_connection, m_pixmap, m_gcontexts.at(gc::BG), x, 0, m_bar.size.w - x, m_bar.size.h);
+
+  // Translate pos of clickable areas
+  if (m_alignment != alignment::LEFT) {
+    for (auto&& action : m_actions) {
+      if (action.active || action.align != m_alignment)
+        continue;
+      action.start_x -= delta;
+      action.end_x -= delta;
+    }
+  }
+
+  m_currentx += shift_x;
+
+  fill_underline(x, shift_x);
+  fill_overline(x, shift_x);
+
+  return x;
+}
+
+int16_t renderer::shift_content(int16_t shift_x) {
+  return shift_content(m_currentx, shift_x);
+}
+
+void renderer::begin_action(const mousebtn btn, const string& cmd) {
+  action_block action{};
+  action.button = btn;
+  action.align = m_alignment;
+  action.start_x = m_currentx;
+  action.command = string_util::replace_all(cmd, ":", "\\:");
+  action.active = true;
+  if (action.button == mousebtn::NONE)
+    action.button = mousebtn::LEFT;
+  m_log.trace_x("renderer: begin_action(%i, %s)", static_cast<uint8_t>(action.button), cmd.c_str());
+  m_actions.emplace_back(action);
+}
+
+void renderer::end_action(const mousebtn btn) {
+  for (auto action = m_actions.rbegin(); action != m_actions.rend(); action++) {
+    if (!action->active || action->button != btn)
+      continue;
+
+    m_log.trace_x("renderer: end_action(%i, %s)", static_cast<uint8_t>(btn), action->command.c_str());
+
+    action->active = false;
+
+    if (action->align == alignment::LEFT) {
+      action->end_x = m_currentx;
+    } else if (action->align == alignment::CENTER) {
+      int base_x{m_bar.size.w};
+      int clickable_width{m_currentx - action->start_x};
+      base_x -= m_bar.borders.at(edge::RIGHT).size;
+      base_x /= 2;
+      base_x += m_bar.borders.at(edge::LEFT).size;
+      action->start_x = base_x - clickable_width / 2 + action->start_x / 2;
+      action->end_x = action->start_x + clickable_width;
+    } else if (action->align == alignment::RIGHT) {
+      int base_x{m_bar.size.w - m_bar.borders.at(edge::RIGHT).size};
+      if (m_reserve_at == edge::RIGHT)
+        base_x -= m_reserve;
+      action->start_x = base_x - m_currentx + action->start_x;
+      action->end_x = base_x;
+    }
+
+    return;
+  }
+}
+
+const vector<action_block> renderer::get_actions() {
+  return m_actions;
+}
+
+void renderer::debughints() {
+#if DEBUG and DRAW_CLICKABLE_AREA_HINTS
+  map<alignment, int> hint_num{{
+      {alignment::LEFT, 0}, {alignment::CENTER, 0}, {alignment::RIGHT, 0},
+  }};
+
+  for (auto&& action : m_actions) {
+    if (action.active) {
+      continue;
+    }
+
+    m_log.info("Drawing clickable area hints");
+
+    hint_num[action.align]++;
+
+    auto x = action.start_x;
+    auto y = m_bar.y + hint_num[action.align]++ * DRAW_CLICKABLE_AREA_HINTS_OFFSET_Y;
+    auto w = action.end_x - action.start_x - 2;
+    auto h = m_bar.size.h - 2;
+
+    const uint32_t mask = XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT;
+    const uint32_t border_color = hint_num[action.align] % 2 ? 0xff0000 : 0x00ff00;
+    const uint32_t values[2]{border_color, true};
+
+    action.hint = m_connection.generate_id();
+    m_connection.create_window(m_screen->root_depth, action.hint, m_screen->root, x, y, w, h, 1,
+        XCB_WINDOW_CLASS_INPUT_OUTPUT, m_screen->root_visual, mask, values);
+    m_connection.map_window(action.hint);
+  }
+
+  m_connection.flush();
+#endif
+}
+
+POLYBAR_NS_END

src/components/signals.cpp

@@ -12,18 +12,17 @@ callback<bool> g_signals::bar::visibility_change{nullptr};
 /**
  * Signals used to communicate with the input parser
  */
-callback<alignment> g_signals::parser::alignment_change{nullptr};
+callback<const alignment> g_signals::parser::alignment_change{nullptr};
-callback<attribute> g_signals::parser::attribute_set{nullptr};
+callback<const attribute> g_signals::parser::attribute_set{nullptr};
-callback<attribute> g_signals::parser::attribute_unset{nullptr};
+callback<const attribute> g_signals::parser::attribute_unset{nullptr};
-callback<attribute> g_signals::parser::attribute_toggle{nullptr};
+callback<const mousebtn, string> g_signals::parser::action_block_open{nullptr};
-callback<mousebtn, string> g_signals::parser::action_block_open{nullptr};
+callback<const mousebtn> g_signals::parser::action_block_close{nullptr};
-callback<mousebtn> g_signals::parser::action_block_close{nullptr};
+callback<const gc, const uint32_t> g_signals::parser::color_change{nullptr};
-callback<gc, color> g_signals::parser::color_change{nullptr};
+callback<const int8_t> g_signals::parser::font_change{nullptr};
-callback<int> g_signals::parser::font_change{nullptr};
+callback<const int16_t> g_signals::parser::pixel_offset{nullptr};
-callback<int> g_signals::parser::pixel_offset{nullptr};
+callback<const uint16_t> g_signals::parser::ascii_text_write{nullptr};
-callback<uint16_t> g_signals::parser::ascii_text_write{nullptr};
+callback<const uint16_t> g_signals::parser::unicode_text_write{nullptr};
-callback<uint16_t> g_signals::parser::unicode_text_write{nullptr};
+callback<const char*, const size_t> g_signals::parser::string_write{nullptr};
-callback<const char*, size_t> g_signals::parser::string_write{nullptr};
 
 /**
  * Signals used to communicate with the tray manager

src/drawtypes/progressbar.cpp

@@ -115,9 +115,9 @@ namespace drawtypes {
     // avoid color bleed
     if (icon_empty && icon_indicator) {
       if (!icon_indicator->m_background.empty() && icon_empty->m_background.empty())
-        icon_empty->m_background = bar.background.source();
+        icon_empty->m_background = color_util::hex<uint16_t>(bar.background);
       if (!icon_indicator->m_foreground.empty() && icon_empty->m_foreground.empty())
-        icon_empty->m_foreground = bar.foreground.source();
+        icon_empty->m_foreground = color_util::hex<uint16_t>(bar.foreground);
     }
 
     progressbar->set_empty(move(icon_empty));

src/x11/color.cpp

@@ -41,7 +41,7 @@ color::operator XRenderColor() const {
 }
 
 color::operator string() const {
-  return color_util::hex(m_color);
+  return color_util::hex<uint8_t>(m_color);
 }
 
 color::operator uint32_t() const {

src/x11/fonts.cpp

@@ -37,21 +37,7 @@ font_manager::~font_manager() {
   m_fonts.clear();
 }
 
-void font_manager::set_preferred_font(int index) {
+bool font_manager::load(string name, int8_t fontindex, int8_t offset_y) {
-  if (index <= 0) {
-    m_fontindex = -1;
-    return;
-  }
-
-  for (auto&& font : m_fonts) {
-    if (font.first == index) {
-      m_fontindex = index;
-      break;
-    }
-  }
-}
-
-bool font_manager::load(string name, int fontindex, int offset_y) {
   if (fontindex != -1 && m_fonts.find(fontindex) != m_fonts.end()) {
     m_logger.warn("A font with index '%i' has already been loaded, skip...", fontindex);
     return false;
@@ -92,6 +78,20 @@ bool font_manager::load(string name, int fontindex, int offset_y) {
   return true;
 }
 
+void font_manager::set_preferred_font(int8_t index) {
+  if (index <= 0) {
+    m_fontindex = -1;
+    return;
+  }
+
+  for (auto&& font : m_fonts) {
+    if (font.first == index) {
+      m_fontindex = index;
+      break;
+    }
+  }
+}
+
 font_t& font_manager::match_char(uint16_t chr) {
   static font_t notfound;
   if (!m_fonts.empty()) {
@@ -108,7 +108,7 @@ font_t& font_manager::match_char(uint16_t chr) {
   return notfound;
 }
 
-int font_manager::char_width(font_t& font, uint16_t chr) {
+uint8_t font_manager::char_width(font_t& font, uint16_t chr) {
   if (!font)
     return 0;
 
@@ -142,6 +142,28 @@ XftColor font_manager::xftcolor() {
   return m_xftcolor;
 }
 
+XftDraw* font_manager::xftdraw() {
+  return m_xftdraw;
+}
+
+XftDraw* font_manager::create_xftdraw(xcb_pixmap_t pm, xcb_colormap_t cm) {
+  m_xftdraw = XftDrawCreate(xlib::get_display(), pm, xlib::get_visual(), cm);
+  return m_xftdraw;
+}
+
+void font_manager::destroy_xftdraw() {
+  XftDrawDestroy(m_xftdraw);
+}
+
+void font_manager::allocate_color(uint32_t color, bool initial_alloc) {
+  XRenderColor x;
+  x.red = color_util::red_channel<uint16_t>(color);
+  x.green = color_util::green_channel<uint16_t>(color);
+  x.blue = color_util::blue_channel<uint16_t>(color);
+  x.alpha = color_util::alpha_channel<uint16_t>(color);
+  allocate_color(x, initial_alloc);
+}
+
 void font_manager::allocate_color(XRenderColor color, bool initial_alloc) {
   if (!initial_alloc)
     XftColorFree(m_display, m_visual, m_colormap, &m_xftcolor);
@@ -150,7 +172,7 @@ void font_manager::allocate_color(XRenderColor color, bool initial_alloc) {
     m_logger.err("Failed to allocate color");
 }
 
-void font_manager::set_gcontext_font(gcontext& gc, xcb_font_t font) {
+void font_manager::set_gcontext_font(xcb_gcontext_t gc, xcb_font_t font) {
   const uint32_t values[1]{font};
   m_connection.change_gc(gc, XCB_GC_FONT, values);
 }