wip: Window autohide

include/components/bar.hpp

@@ -1,17 +1,22 @@
 #pragma once
 
+#include <atomic>
 #include <mutex>
 
 #include "common.hpp"
 #include "components/types.hpp"
 #include "errors.hpp"
 #include "events/signal_fwd.hpp"
+#include "events/signal_receiver.hpp"
 #include "x11/events.hpp"
 #include "x11/types.hpp"
 #include "x11/window.hpp"
 
 POLYBAR_NS
 
+namespace chrono = std::chrono;
+using namespace std::chrono_literals;
+
 // fwd
 class connection;
 class logger;
@@ -22,8 +27,12 @@ class signal_emitter;
 class taskqueue;
 class tray_manager;
 
+namespace sig_ui = signals::ui;
+namespace sig_ev = signals::eventqueue;
+
 class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::property_notify, evt::enter_notify,
-                evt::leave_notify, evt::destroy_notify, evt::client_message> {
+                evt::leave_notify, evt::destroy_notify, evt::client_message>,
+            public signal_receiver<SIGN_PRIORITY_BAR, sig_ui::tick, sig_ui::shade_window, sig_ui::unshade_window, sig_ui::dim_window> {
  public:
   using make_type = unique_ptr<bar>;
   static make_type make();
@@ -52,6 +61,11 @@ 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);
 
+  bool on(const sig_ui::unshade_window&);
+  bool on(const sig_ui::shade_window&);
+  bool on(const sig_ui::tick&);
+  bool on(const sig_ui::dim_window&);
+
  private:
   connection& m_connection;
   signal_emitter& m_sig;
@@ -73,6 +87,8 @@ class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::propert
 
   event_timer m_buttonpress{0L, 5L};
   event_timer m_doubleclick{0L, 150L};
+
+  double m_anim_step{0};
 };
 
 POLYBAR_NS_END

include/components/taskqueue.hpp

@@ -16,17 +16,20 @@ using namespace std::chrono_literals;
 
 class taskqueue : non_copyable_mixin<taskqueue> {
  public:
-  struct deferred : non_copyable_mixin<deferred> {
+  struct deferred {
+    using clock = chrono::high_resolution_clock;
     using duration = chrono::milliseconds;
-    using timepoint = chrono::time_point<chrono::high_resolution_clock, duration>;
-    using callback = function<void()>;
+    using timepoint = chrono::time_point<clock, duration>;
+    using callback = function<void(size_t remaining)>;
 
-    explicit deferred(string&& id, timepoint&& tp, callback&& fn)
-        : id(forward<decltype(id)>(id)), when(forward<decltype(tp)>(tp)), func(forward<decltype(fn)>(fn)) {}
+    explicit deferred(string id, timepoint now, duration wait, callback fn, size_t count)
+        : id(move(id)), func(move(fn)), now(move(now)), wait(move(wait)), count(move(count)) {}
 
     const string id;
-    const timepoint when;
     const callback func;
+    timepoint now;
+    duration wait;
+    size_t count;
   };
 
  public:
@@ -36,10 +39,13 @@ class taskqueue : non_copyable_mixin<taskqueue> {
   explicit taskqueue();
   ~taskqueue();
 
-  void defer(string&& id, deferred::duration&& ms, deferred::callback&& fn);
-  void defer_unique(string&& id, deferred::duration&& ms, deferred::callback&& fn);
+  void defer(
+      string id, deferred::duration ms, deferred::callback fn, deferred::duration offset = 0ms, size_t count = 1);
+  void defer_unique(
+      string id, deferred::duration ms, deferred::callback fn, deferred::duration offset = 0ms, size_t count = 1);
 
-  bool has_deferred(string&& id);
+  bool exist(const string& id);
+  bool purge(const string& id);
 
  protected:
   void tick();

include/components/types.hpp

@@ -151,6 +151,12 @@ struct bar_settings {
   bool dimmed{false};
   double dimvalue{1.0};
 
+  bool shaded{false};
+  struct size shade_size {
+    1U, 1U
+  };
+  position shade_pos{1U, 1U};
+
   const xcb_rectangle_t inner_area(bool abspos = false) const {
     xcb_rectangle_t rect{0, 0, size.w, size.h};
 

include/events/signal.hpp

@@ -95,7 +95,7 @@ namespace signals {
     DEFINE_VALUE_SIGNAL(1, process_quit, event);
     DEFINE_VALUE_SIGNAL(2, process_update, event);
     DEFINE_VALUE_SIGNAL(3, process_input, string);
-    DEFINE_VALUE_SIGNAL(4, process_check, event);
+    DEFINE_SIGNAL(4, process_check);
   }
 
   namespace ipc {
@@ -105,9 +105,12 @@ namespace signals {
   }
 
   namespace ui {
-    DEFINE_VALUE_SIGNAL(50, button_press, string);
-    DEFINE_VALUE_SIGNAL(51, visibility_change, bool);
-    DEFINE_VALUE_SIGNAL(52, dim_window, double);
+    DEFINE_SIGNAL(50, tick);
+    DEFINE_VALUE_SIGNAL(51, button_press, string);
+    DEFINE_VALUE_SIGNAL(52, visibility_change, bool);
+    DEFINE_VALUE_SIGNAL(53, dim_window, double);
+    DEFINE_SIGNAL(54, shade_window);
+    DEFINE_SIGNAL(55, unshade_window);
   }
 
   namespace parser {

include/events/signal_fwd.hpp

@@ -17,9 +17,12 @@ namespace signals {
     struct process_action;
   }
   namespace ui {
+    struct tick;
     struct button_press;
     struct visibility_change;
     struct dim_window;
+    struct shade_window;
+    struct unshade_window;
   }
   namespace parser {
     struct change_background;

src/components/bar.cpp

@@ -283,6 +283,8 @@ bar::bar(connection& conn, signal_emitter& emitter, const config& config, const
   m_tray->setup(static_cast<const bar_settings&>(m_opts));
 
   broadcast_visibility();
+
+  m_sig.attach(this);
 }
 
 /**
@@ -291,6 +293,7 @@ bar::bar(connection& conn, signal_emitter& emitter, const config& config, const
 bar::~bar() {
   std::lock_guard<std::mutex> guard(m_mutex);
   m_connection.detach_sink(this, SINK_PRIORITY_BAR);
+  m_sig.detach(this);
 }
 
 /**
@@ -313,6 +316,10 @@ void bar::parse(const string& data, bool force) {
 
   std::lock_guard<std::mutex> guard(m_mutex, std::adopt_lock);
 
+  if (m_opts.shaded) {
+    return m_log.trace("bar: Ignoring update (shaded)");
+  }
+
   if (data == m_lastinput && !force) {
     return;
   }
@@ -449,10 +456,7 @@ void bar::broadcast_visibility() {
  * Event handler for XCB_DESTROY_NOTIFY events
  */
 void bar::handle(const evt::client_message& evt) {
-  if (evt->type != WM_PROTOCOLS || evt->data.data32[0] != WM_DELETE_WINDOW) {
-    return;
-  }
-  if (evt->window == m_opts.window) {
+  if (evt->type == WM_PROTOCOLS && evt->data.data32[0] == WM_DELETE_WINDOW && evt->window == m_opts.window) {
     m_log.err("Bar window has been destroyed, shutting down...");
     m_connection.disconnect();
   }
@@ -474,11 +478,18 @@ void bar::handle(const evt::destroy_notify& evt) {
  * _NET_WM_WINDOW_OPACITY atom value
  */
 void bar::handle(const evt::enter_notify&) {
+#if DEBUG
+  if (m_opts.origin == edge::TOP) {
+    m_taskqueue->defer_unique("window-hover", 25ms, [&](size_t) { m_sig.emit(sig_ui::unshade_window{}); });
+    return;
+  }
+#endif
+
   if (m_opts.dimmed) {
-    window win{m_connection, m_opts.window};
-    wm_util::set_wm_window_opacity(m_connection, m_opts.window, 1.0 * 0xFFFFFFFF);
-    m_sig.emit(dim_window{1.0});
+    m_taskqueue->defer_unique("window-dim", 25ms, [&](size_t) {
       m_opts.dimmed = false;
+      m_sig.emit(dim_window{1.0});
+    });
   }
 }
 
@@ -489,11 +500,18 @@ void bar::handle(const evt::enter_notify&) {
  * _NET_WM_WINDOW_OPACITY atom value
  */
 void bar::handle(const evt::leave_notify&) {
+#if DEBUG
+  if (m_opts.origin == edge::TOP) {
+    m_taskqueue->defer_unique("window-hover", 25ms, [&](size_t) { m_sig.emit(sig_ui::shade_window{}); });
+    return;
+  }
+#endif
+
   if (!m_opts.dimmed) {
-    window win{m_connection, m_opts.window};
-    wm_util::set_wm_window_opacity(m_connection, m_opts.window, m_opts.dimvalue * 0xFFFFFFFF);
-    m_sig.emit(dim_window{double{m_opts.dimvalue}});
+    m_taskqueue->defer_unique("window-dim", 3s, [&](size_t) {
       m_opts.dimmed = true;
+      m_sig.emit(dim_window{double{m_opts.dimvalue}});
+    });
   }
 }
 
@@ -518,7 +536,7 @@ void bar::handle(const evt::button_press& evt) {
   m_buttonpress_btn = static_cast<mousebtn>(evt->detail);
   m_buttonpress_pos = evt->event_x;
 
-  const auto deferred_fn = [&] {
+  const auto deferred_fn = [&](size_t) {
     for (auto&& action : m_renderer->get_actions()) {
       if (action.button == m_buttonpress_btn && !action.active && action.test(m_buttonpress_pos)) {
         m_log.trace("Found matching input area");
@@ -537,13 +555,13 @@ void bar::handle(const evt::button_press& evt) {
   };
 
   const auto check_double = [&](string&& id, mousebtn&& btn) {
-    if (!m_taskqueue->has_deferred(string{id})) {
+    if (!m_taskqueue->exist(id)) {
       m_doubleclick.event = evt->time;
-      m_taskqueue->defer_unique(string{id}, chrono::milliseconds{m_doubleclick.offset}, deferred_fn);
+      m_taskqueue->defer(id, taskqueue::deferred::duration{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);
+      m_buttonpress_btn = btn;
+      m_taskqueue->defer_unique(id, 0ms, deferred_fn);
     }
   };
 
@@ -554,7 +572,7 @@ void bar::handle(const evt::button_press& evt) {
   } else if (evt->detail == static_cast<uint8_t>(mousebtn::RIGHT)) {
     check_double("buttonpress-right", mousebtn::DOUBLE_RIGHT);
   } else {
-    deferred_fn();
+    deferred_fn(0);
   }
 }
 
@@ -597,4 +615,113 @@ void bar::handle(const evt::property_notify& evt) {
   }
 }
 
+bool bar::on(const sig_ui::unshade_window&) {
+  m_opts.shaded = false;
+  m_opts.shade_size.w = m_opts.size.w;
+  m_opts.shade_size.h = m_opts.size.h;
+  m_opts.shade_pos.x = m_opts.pos.x;
+  m_opts.shade_pos.y = m_opts.pos.y;
+
+  double distance{static_cast<double>(m_opts.shade_size.h - m_connection.get_geometry(m_opts.window)->height)};
+  double steptime{25.0 / 10.0};
+  m_anim_step = distance / steptime / 2.0;
+
+  m_taskqueue->defer_unique("window-shade", 25ms,
+      [&](size_t remaining) {
+        if (!m_opts.shaded) {
+          m_sig.emit(sig_ui::tick{});
+        }
+        if (!remaining) {
+          m_renderer->flush(false);
+        }
+        if (m_opts.dimmed) {
+          m_opts.dimmed = false;
+          m_sig.emit(dim_window{1.0});
+        }
+      },
+      taskqueue::deferred::duration{25ms}, 10U);
+
+  return true;
+}
+
+bool bar::on(const sig_ui::shade_window&) {
+  taskqueue::deferred::duration offset{2000ms};
+
+  if (!m_opts.shaded && m_opts.shade_size.h != m_opts.size.h) {
+    offset = taskqueue::deferred::duration{25ms};
+  }
+
+  m_opts.shaded = true;
+  m_opts.shade_size.h = 5;
+  m_opts.shade_size.w = m_opts.size.w;
+  m_opts.shade_pos.x = m_opts.pos.x;
+  m_opts.shade_pos.y = m_opts.pos.y;
+
+  if (m_opts.origin == edge::BOTTOM) {
+    m_opts.shade_pos.y = m_opts.pos.y + m_opts.size.h - m_opts.shade_size.h;
+  }
+
+  double distance{static_cast<double>(m_connection.get_geometry(m_opts.window)->height - m_opts.shade_size.h)};
+  double steptime{25.0 / 10.0};
+  m_anim_step = distance / steptime / 2.0;
+
+  m_taskqueue->defer_unique("window-shade", 25ms,
+      [&](size_t remaining) {
+        if (m_opts.shaded) {
+          m_sig.emit(sig_ui::tick{});
+        }
+        if (!remaining) {
+          m_renderer->flush(false);
+        }
+        if (!m_opts.dimmed) {
+          m_opts.dimmed = true;
+          m_sig.emit(dim_window{double{m_opts.dimvalue}});
+        }
+      },
+      move(offset), 10U);
+
+  return true;
+}
+
+bool bar::on(const sig_ui::tick&) {
+  auto geom = m_connection.get_geometry(m_opts.window);
+  if (geom->y == m_opts.shade_pos.y && geom->height == m_opts.shade_size.h) {
+    return false;
+  }
+
+  uint32_t mask{0};
+  uint32_t values[7]{0};
+  xcb_params_configure_window_t params{};
+
+  if (m_opts.shade_size.h > geom->height) {
+    XCB_AUX_ADD_PARAM(&mask, &params, height, static_cast<uint16_t>(geom->height + m_anim_step));
+    params.height = std::max(1U, std::min(params.height, static_cast<uint32_t>(m_opts.shade_size.h)));
+  } else if (m_opts.shade_size.h < geom->height) {
+    XCB_AUX_ADD_PARAM(&mask, &params, height, static_cast<uint16_t>(geom->height - m_anim_step));
+    params.height = std::max(1U, std::max(params.height, static_cast<uint32_t>(m_opts.shade_size.h)));
+  }
+
+  if (m_opts.shade_pos.y > geom->y) {
+    XCB_AUX_ADD_PARAM(&mask, &params, y, static_cast<int16_t>(geom->y + m_anim_step));
+    params.y = std::min(params.y, static_cast<int32_t>(m_opts.shade_pos.y));
+  } else if (m_opts.shade_pos.y < geom->y) {
+    XCB_AUX_ADD_PARAM(&mask, &params, y, static_cast<int16_t>(geom->y - m_anim_step));
+    params.y = std::max(params.y, static_cast<int32_t>(m_opts.shade_pos.y));
+  }
+
+  xutils::pack_values(mask, &params, values);
+
+  m_connection.configure_window(m_opts.window, mask, values);
+  m_connection.flush();
+
+  return false;
+}
+
+bool bar::on(const sig_ui::dim_window& sig) {
+  m_opts.dimmed = *sig.data() != 1.0;
+  wm_util::set_wm_window_opacity(m_connection, m_opts.window, *sig.data() * 0xFFFFFFFF);
+  m_connection.flush();
+  return false;
+}
+
 POLYBAR_NS_END

src/components/controller.cpp

@@ -321,14 +321,14 @@ void controller::process_eventqueue() {
       }
     }
 
-    if (evt.type == static_cast<uint8_t>(event_type::INPUT)) {
+    if (evt.type == static_cast<uint8_t>(event_type::UPDATE)) {
+      m_sig.emit(sig_ev::process_update{make_update_evt(evt.flag)});
+    } else if (evt.type == static_cast<uint8_t>(event_type::INPUT)) {
       process_inputdata();
     } else if (evt.type == static_cast<uint8_t>(event_type::QUIT)) {
       m_sig.emit(sig_ev::process_quit{make_quit_evt(evt.flag)});
-    } else if (evt.type == static_cast<uint8_t>(event_type::UPDATE)) {
-      m_sig.emit(sig_ev::process_update{make_update_evt(evt.flag)});
     } else if (evt.type == static_cast<uint8_t>(event_type::CHECK)) {
-      m_sig.emit(sig_ev::process_check{make_check_evt()});
+      m_sig.emit(sig_ev::process_check{});
     } else {
       m_log.warn("Unknown event type for enqueued event (%d)", evt.type);
     }

src/components/renderer.cpp

@@ -254,6 +254,22 @@ void renderer::flush(bool clear) {
     m_cleared = clear_area;
   }
 
+#if DEBUG
+  if (m_bar.shaded && m_bar.origin == edge::TOP) {
+    m_log.trace("renderer: copy pixmap (shaded=1, clear=%i, geom=%dx%d+%d+%d)", clear, r.width, r.height, r.x, r.y);
+    auto geom = m_connection.get_geometry(m_window);
+    auto x1 = 0;
+    auto y1 = r.height - m_bar.shade_size.h - r.y - geom->height;
+    auto x2 = r.x;
+    auto y2 = r.y;
+    auto w = r.width;
+    auto h = r.height - m_bar.shade_size.h + geom->height;
+    m_connection.copy_area(m_pixmap, m_window, m_gcontexts.at(gc::FG), x1, y1, x2, y2, w, h);
+    m_connection.flush();
+    return;
+  }
+#endif
+
   m_log.trace("renderer: copy pixmap (clear=%i, geom=%dx%d+%d+%d)", clear, r.width, r.height, r.x, r.y);
   m_connection.copy_area(m_pixmap, m_window, m_gcontexts.at(gc::FG), 0, 0, r.x, r.y, r.width, r.height);
 

src/components/taskqueue.cpp

@@ -17,11 +17,12 @@ taskqueue::taskqueue() {
       if (m_deferred.empty()) {
         m_hold.wait(guard);
       } else {
-        auto now = deferred::timepoint::clock::now();
-        auto wait = m_deferred.front()->when;
+        auto now = deferred::clock::now();
+        auto wait = m_deferred.front()->now + m_deferred.front()->wait;
         for (auto&& task : m_deferred) {
-          if (task->when < wait) {
-            wait = task->when;
+          auto when = task->now + task->wait;
+          if (when < wait) {
+            wait = move(when);
           }
         }
         if (wait > now) {
@@ -44,41 +45,59 @@ taskqueue::~taskqueue() {
   }
 }
 
-void taskqueue::defer(string&& id, deferred::duration&& ms, deferred::callback&& fn) {
+void taskqueue::defer(
+    string id, deferred::duration ms, deferred::callback fn, deferred::duration offset, size_t count) {
   std::unique_lock<std::mutex> guard(m_lock);
-  auto when = chrono::time_point_cast<deferred::duration>(deferred::timepoint::clock::now() + ms);
-  m_deferred.emplace_back(make_unique<deferred>(forward<decltype(id)>(id), move(when), forward<decltype(fn)>(fn)));
+  deferred::timepoint now{chrono::time_point_cast<deferred::duration>(deferred::clock::now() + move(offset))};
+  m_deferred.emplace_back(make_unique<deferred>(move(id), move(now), move(ms), move(fn), move(count)));
   guard.unlock();
   m_hold.notify_one();
 }
 
-void taskqueue::defer_unique(string&& id, deferred::duration&& ms, deferred::callback&& fn) {
+void taskqueue::defer_unique(
+    string id, deferred::duration ms, deferred::callback fn, deferred::duration offset, size_t count) {
+  purge(id);
   std::unique_lock<std::mutex> guard(m_lock);
-  for (auto it = m_deferred.rbegin(); it != m_deferred.rend(); ++it) {
-    if ((*it)->id == id) {
-      m_deferred.erase(std::remove(m_deferred.begin(), m_deferred.end(), (*it)), m_deferred.end());
-    }
-  }
-  auto when = chrono::time_point_cast<deferred::duration>(deferred::timepoint::clock::now() + ms);
-  m_deferred.emplace_back(make_unique<deferred>(forward<decltype(id)>(id), move(when), forward<decltype(fn)>(fn)));
+  deferred::timepoint now{chrono::time_point_cast<deferred::duration>(deferred::clock::now() + move(offset))};
+  m_deferred.emplace_back(make_unique<deferred>(move(id), move(now), move(ms), move(fn), move(count)));
   guard.unlock();
   m_hold.notify_one();
 }
 
 void taskqueue::tick() {
-  if (m_lock.try_lock()) {
-    std::lock_guard<std::mutex> guard(m_lock, std::adopt_lock);
-    auto now = deferred::timepoint::clock::now();
+  if (!m_lock.try_lock()) {
+    return;
+  }
+  std::unique_lock<std::mutex> guard(m_lock, std::adopt_lock);
+  auto now = chrono::time_point_cast<deferred::duration>(deferred::clock::now());
+  vector<pair<deferred::callback, size_t>> cbs;
   for (auto it = m_deferred.rbegin(); it != m_deferred.rend(); ++it) {
-      if ((*it)->when <= now) {
-        (*it)->func();
-        m_deferred.erase(std::remove(m_deferred.begin(), m_deferred.end(), (*it)), m_deferred.end());
+    auto& task = *it;
+    if (task->now + task->wait > now) {
+      continue;
+    } else if (task->count--) {
+      cbs.emplace_back(make_pair(task->func, task->count));
+      task->now = now;
+    } else {
+      m_deferred.erase(std::remove_if(m_deferred.begin(), m_deferred.end(),
+                           [&](const unique_ptr<deferred>& d) { return d == task; }),
+          m_deferred.end());
     }
   }
+  guard.unlock();
+  for (auto&& p : cbs) {
+    p.first(p.second);
   }
 }
 
-bool taskqueue::has_deferred(string&& id) {
+bool taskqueue::purge(const string& id) {
+  std::lock_guard<std::mutex> guard(m_lock);
+  return m_deferred.erase(std::remove_if(m_deferred.begin(), m_deferred.end(),
+                              [id](const unique_ptr<deferred>& d) { return d->id == id; }),
+             m_deferred.end()) == m_deferred.end();
+}
+
+bool taskqueue::exist(const string& id) {
   std::lock_guard<std::mutex> guard(m_lock);
   for (const auto& task : m_deferred) {
     if (task->id == id) {

src/x11/tray_manager.cpp

@@ -1148,6 +1148,7 @@ bool tray_manager::on(const visibility_change& evt) {
 bool tray_manager::on(const dim_window& evt) {
   if (m_activated) {
     wm_util::set_wm_window_opacity(m_connection, m_tray, *evt.data() * 0xFFFFFFFF);
+    m_connection.flush();
   }
   // let the event bubble
   return false;

src/x11/wm.cpp

@@ -42,7 +42,6 @@ namespace wm_util {
         xcb_intern_atom_reply(conn, xcb_intern_atom(conn, false, 22, "_NET_WM_WINDOW_OPACITY"), nullptr)};
     if (reply) {
       xcb_change_property(conn, XCB_PROP_MODE_REPLACE, win, reply->atom, XCB_ATOM_CARDINAL, 32, 1, &values);
-      xcb_flush(conn);
       free(reply);
     }
   }