refactor: Defer buttonpress using taskqueue

include/components/bar.hpp

@@ -19,6 +19,7 @@ class parser;
 class renderer;
 class screen;
 class signal_emitter;
+class taskqueue;
 class tray_manager;
 
 class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::property_notify, evt::enter_notify,
@@ -27,9 +28,9 @@ class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::propert
   using make_type = unique_ptr<bar>;
   static make_type make();
 
-  explicit bar(connection& conn, signal_emitter& emitter, const config& config, const logger& logger,
-      unique_ptr<screen>&& screen, unique_ptr<tray_manager>&& tray_manager, unique_ptr<parser>&& parser);
-  virtual ~bar();
+  explicit bar(connection&, signal_emitter&, const config&, const logger&, unique_ptr<screen>&&,
+      unique_ptr<tray_manager>&&, unique_ptr<parser>&&, unique_ptr<taskqueue>&&);
+  ~bar();
 
   void parse(string&& data) const;
   void parse(const string& data, bool force = false);
@@ -60,14 +61,18 @@ class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::propert
   unique_ptr<tray_manager> m_tray{};
   unique_ptr<renderer> m_renderer{};
   unique_ptr<parser> m_parser{};
+  unique_ptr<taskqueue> m_taskqueue;
 
   bar_settings m_opts{};
 
   string m_lastinput{};
-
   std::mutex m_mutex{};
 
+  mousebtn m_buttonpress_btn{mousebtn::NONE};
+  int16_t m_buttonpress_pos{0};
+
   event_timer m_buttonpress{0L, 5L};
+  event_timer m_doubleclick{0L, 150L};
 };
 
 POLYBAR_NS_END

include/components/types.hpp

@@ -33,7 +33,17 @@ enum class syntaxtag : uint8_t {
   u,  // underline color
 };
 
-enum class mousebtn : uint8_t { NONE = 0U, LEFT, MIDDLE, RIGHT, SCROLL_UP, SCROLL_DOWN };
+enum class mousebtn : uint8_t {
+  NONE = 0U,
+  LEFT,
+  MIDDLE,
+  RIGHT,
+  SCROLL_UP,
+  SCROLL_DOWN,
+  DOUBLE_LEFT,
+  DOUBLE_MIDDLE,
+  DOUBLE_RIGHT
+};
 
 enum class strut : uint16_t {
   LEFT = 0U,

src/components/bar.cpp

@@ -7,6 +7,7 @@
 #include "components/parser.hpp"
 #include "components/renderer.hpp"
 #include "components/screen.hpp"
+#include "components/taskqueue.hpp"
 #include "events/signal.hpp"
 #include "events/signal_emitter.hpp"
 #include "utils/bspwm.hpp"
@@ -42,7 +43,8 @@ bar::make_type bar::make() {
         logger::make(),
         screen::make(),
         tray_manager::make(),
-        parser::make());
+        parser::make(),
+        taskqueue::make());
   // clang-format on
 }
 
@@ -52,14 +54,16 @@ bar::make_type bar::make() {
  * TODO: Break out all tray handling
  */
 bar::bar(connection& conn, signal_emitter& emitter, const config& config, const logger& logger,
-    unique_ptr<screen>&& screen, unique_ptr<tray_manager>&& tray_manager, unique_ptr<parser>&& parser)
+    unique_ptr<screen>&& screen, unique_ptr<tray_manager>&& tray_manager, unique_ptr<parser>&& parser,
+    unique_ptr<taskqueue>&& taskqueue)
     : m_connection(conn)
     , m_sig(emitter)
     , m_conf(config)
     , m_log(logger)
     , m_screen(forward<decltype(screen)>(screen))
     , m_tray(forward<decltype(tray_manager)>(tray_manager))
-    , m_parser(forward<decltype(parser)>(parser)) {
+    , m_parser(forward<decltype(parser)>(parser))
+    , m_taskqueue(forward<decltype(taskqueue)>(taskqueue)) {
   string bs{m_conf.section()};
 
   // Get available RandR outputs
@@ -150,6 +154,9 @@ bar::bar(connection& conn, signal_emitter& emitter, const config& config, const
   actions.emplace_back(action{mousebtn::RIGHT, m_conf.get<string>(bs, "click-right", "")});
   actions.emplace_back(action{mousebtn::SCROLL_UP, m_conf.get<string>(bs, "scroll-up", "")});
   actions.emplace_back(action{mousebtn::SCROLL_DOWN, m_conf.get<string>(bs, "scroll-down", "")});
+  actions.emplace_back(action{mousebtn::DOUBLE_LEFT, m_conf.get<string>(bs, "double-click-left", "")});
+  actions.emplace_back(action{mousebtn::DOUBLE_MIDDLE, m_conf.get<string>(bs, "double-click-middle", "")});
+  actions.emplace_back(action{mousebtn::DOUBLE_RIGHT, m_conf.get<string>(bs, "double-click-right", "")});
 
   for (auto&& act : actions) {
     if (!act.command.empty()) {
@@ -507,25 +514,48 @@ void bar::handle(const evt::button_press& evt) {
   }
 
   m_log.trace("bar: Received button press: %i at pos(%i, %i)", evt->detail, evt->event_x, evt->event_y);
-  mousebtn button{static_cast<mousebtn>(evt->detail)};
 
+  m_buttonpress_btn = static_cast<mousebtn>(evt->detail);
+  m_buttonpress_pos = evt->event_x;
+
+  const auto deferred_fn = [&] {
     for (auto&& action : m_renderer->get_actions()) {
-    if (!action.active && action.button == button && action.test(evt->event_x)) {
+      if (action.button == m_buttonpress_btn && !action.active && action.test(m_buttonpress_pos)) {
         m_log.trace("Found matching input area");
         m_sig.emit(button_press{string{action.command}});
         return;
       }
     }
-
     for (auto&& action : m_opts.actions) {
-    if (action.button == button && !action.command.empty()) {
-      m_log.trace("Triggering fallback click handler: %s", action.command);
+      if (action.button == m_buttonpress_btn && !action.command.empty()) {
+        m_log.trace("Found matching fallback handler");
         m_sig.emit(button_press{string{action.command}});
         return;
       }
     }
+    m_log.warn("No matching input area found (btn=%i)", static_cast<uint8_t>(m_buttonpress_btn));
+  };
 
-  m_log.warn("No matching input area found");
+  const auto check_double = [&](const xcb_timestamp_t& timestamp, string&& id, mousebtn&& btn) {
+    if (!m_taskqueue->has_deferred(string{id})) {
+      m_doubleclick.event = move(timestamp);
+      m_taskqueue->defer_unique(string{id}, chrono::milliseconds{m_doubleclick.offset}, deferred_fn);
+    } else if (m_doubleclick.deny(evt->time)) {
+      m_doubleclick.event = 0;
+      m_buttonpress_btn = forward<decltype(btn)>(btn);
+      m_taskqueue->defer_unique(string{id}, 0ms, deferred_fn);
+    }
+  };
+
+  if (evt->detail == static_cast<uint8_t>(mousebtn::LEFT)) {
+    check_double(evt->time, "buttonpress-left", mousebtn::LEFT);
+  } else if (evt->detail == static_cast<uint8_t>(mousebtn::MIDDLE)) {
+    check_double(evt->time, "buttonpress-middle", mousebtn::MIDDLE);
+  } else if (evt->detail == static_cast<uint8_t>(mousebtn::RIGHT)) {
+    check_double(evt->time, "buttonpress-right", mousebtn::RIGHT);
+  } else {
+    deferred_fn();
+  }
 }
 
 /**

src/modules/xkeyboard.cpp

@@ -134,8 +134,6 @@ namespace modules {
       current_group = 0;
     }
 
-    printf("%zu\n", current_group);
-
     xkb_util::switch_layout(m_connection, XCB_XKB_ID_USE_CORE_KBD, current_group);
     m_keyboard->current(current_group);
     m_connection.flush();