Don't die if status FIFO exists

specify the signed type for indexing tags as intended
for `tag >= 0` check.

Signed-off-by: mortezadadgar <mortezadadgar97@gmail.com>

CHANGELOG.md

@@ -0,0 +1,19 @@
+## [1.0.3] - 2022-12-11
+### Added
+- New patches: markup-in-status-messages, show-status-on-selected-monitor (benc)
+### Fixed
+- Fixed crash when an output disappears
+
+## [1.0.2] - 2022-11-27
+### Fixed
+- Fixed bug where hidden bar could not be shown anymore
+
+## [1.0.1] - 2022-11-25
+### Added
+- Manpage
+- New patches: indicator-size-props, hide-vacant-tags, colorless-status (medanisjbara)
+### Fixed
+- Remove spaces from title and layout symbol (benc)
+
+## [1.0.0] - 2022-04-23
+Initial release

contrib/clickable-tags-using-wtype.patch

@@ -0,0 +1,91 @@
+From: Ben Collerson <benc@benc.cc>
+Date: Sat, 1 Apr 2023 09:16:19 +1000
+Subject: [PATCH somebar] clickable tags using wtype
+
+---
+ src/bar.cpp        |  3 ++-
+ src/common.hpp     |  2 ++
+ src/config.def.hpp |  5 +++++
+ src/main.cpp       | 15 +++++++++++++++
+ 4 files changed, 24 insertions(+), 1 deletion(-)
+
+diff --git a/src/bar.cpp b/src/bar.cpp
+index af92f49..8b68759 100644
+--- a/src/bar.cpp
++++ b/src/bar.cpp
+@@ -182,9 +182,10 @@ void Bar::click(Monitor* mon, int x, int, int btn)
+ 	} else if (x > _layoutCmp.x) {
+ 		control = ClkLayoutSymbol;
+ 	} else for (int tag = _tags.size()-1; tag >= 0; tag--) {
++		// you may need logic to skip tags if they are hidden elsewhere.
+ 		if (x > _tags[tag].component.x) {
+ 			control = ClkTagBar;
+-			arg.ui = 1<<tag;
++			arg.ui = tag;
+ 			argp = &arg;
+ 			break;
+ 		}
+diff --git a/src/common.hpp b/src/common.hpp
+index c905358..a386029 100644
+--- a/src/common.hpp
++++ b/src/common.hpp
+@@ -39,6 +39,8 @@ extern wl_compositor* compositor;
+ extern wl_shm* shm;
+ extern zwlr_layer_shell_v1* wlrLayerShell;
+ 
++void view(Monitor& m, const Arg& arg);
++void tag(Monitor& m, const Arg& arg);
+ void spawn(Monitor&, const Arg& arg);
+ void setCloexec(int fd);
+ [[noreturn]] void die(const char* why);
+diff --git a/src/config.def.hpp b/src/config.def.hpp
+index 40a8c95..de193ea 100644
+--- a/src/config.def.hpp
++++ b/src/config.def.hpp
+@@ -4,6 +4,9 @@
+ #pragma once
+ #include "common.hpp"
+ 
++#define WTYPE "/usr/bin/wtype"
++#define MODKEY "alt"
++
+ constexpr bool topbar = true;
+ 
+ constexpr int paddingX = 10;
+@@ -23,5 +26,7 @@ static std::vector<std::string> tagNames = {
+ };
+ 
+ constexpr Button buttons[] = {
++	{ ClkTagBar,       BTN_LEFT,   view,       {0} },
++	{ ClkTagBar,       BTN_RIGHT,  tag,        {0} },
+ 	{ ClkStatusText,   BTN_RIGHT,  spawn,      {.v = termcmd} },
+ };
+diff --git a/src/main.cpp b/src/main.cpp
+index 6274959..3c35b20 100644
+--- a/src/main.cpp
++++ b/src/main.cpp
+@@ -85,6 +85,21 @@ static int statusFifoFd {-1};
+ static int statusFifoWriter {-1};
+ static bool quitting {false};
+ 
++// update keybindings to match your dwl
++void view(Monitor& m, const Arg& arg)
++{
++	char tag[2];
++	snprintf(tag, 2, "%i", arg.ui + 1);
++	if(fork() == 0)
++		execl(WTYPE, "wtype", "-M", MODKEY, tag, (char*)NULL);
++}
++void tag(Monitor& m, const Arg& arg)
++{
++	char tag[2];
++	snprintf(tag, 2, "%i", arg.ui + 1);
++	if(fork() == 0)
++		execl(WTYPE, "wtype", "-M", MODKEY, "-M", "shift", tag, (char*)NULL);
++}
+ void spawn(Monitor&, const Arg& arg)
+ {
+ 	if (fork() == 0) {
+-- 
+2.40.1
+

contrib/disable-window-title.patch

@@ -0,0 +1,15 @@
+From: Sam Nystrom <samuel.l.nystrom@gmail.com>
+Date: Sat, 4 Mar 2023 17:38:12 -0500
+Description: disable window title
+diff --git a/src/bar.cpp b/src/bar.cpp
+index 507ce62..1b6f771 100644
+--- a/src/bar.cpp
++++ b/src/bar.cpp
+@@ -227,7 +227,6 @@ void Bar::render()
+ 	renderTags();
+ 	setColorScheme(_selected ? colorActive : colorInactive);
+ 	renderComponent(_layoutCmp);
+-	renderComponent(_titleCmp);
+ 	renderStatus();
+ 
+ 	_painter = nullptr;

contrib/dwm-like-tag-indicator.patch

@@ -0,0 +1,34 @@
+From: Henrique Possatto <henriquempossatto@gmail.com>
+Date: Mon, 26 Dec 2022 18:01:35 -0300
+Subject: [PATCH somebar] patch to show square tag indicator like dwm
+diff --git a/src/bar.cpp b/src/bar.cpp
+index 507ce62..4fda8b0 100644
+--- a/src/bar.cpp
++++ b/src/bar.cpp
+@@ -245,12 +245,17 @@ void Bar::renderTags()
+ 			tag.state & TagState::Active ? colorActive : colorInactive,
+ 			tag.state & TagState::Urgent);
+ 		renderComponent(tag.component);
+-		auto indicators = std::min(tag.numClients, static_cast<int>(_bufs->height/2));
+-		for (auto ind = 0; ind < indicators; ind++) {
+-			auto w = ind == tag.focusedClient ? 7 : 1;
+-			cairo_move_to(_painter, tag.component.x, ind*2+0.5);
+-			cairo_rel_line_to(_painter, w, 0);
+-			cairo_close_path(_painter);
++
++		if(!tag.numClients)
++			continue;
++
++		int s = barfont.height / 9;
++		int w = barfont.height / 6 + 2;
++		if (tag.focusedClient != -1) {
++			cairo_rectangle(_painter, tag.component.x + s, s, w, w);
++			cairo_fill(_painter);
++		} else {
++			cairo_rectangle(_painter, (double)(tag.component.x + s) + 0.5, (double)(s) + 0.5, w, w);
+ 			cairo_set_line_width(_painter, 1);
+ 			cairo_stroke(_painter);
+ 		}
+--
+2.39.0
+

contrib/hide-vacant-tags.patch

@@ -5,30 +5,50 @@ diff --git a/src/bar.cpp b/src/bar.cpp
 index fab5a8f..38e7b5f 100644
 --- a/src/bar.cpp
 +++ b/src/bar.cpp
-@@ -240,12 +240,22 @@ void Bar::render()
+@@ -240,13 +240,36 @@ void Bar::render()
  
  void Bar::renderTags()
  {
-+	bool focused;
++	// Check if all tags are active (Mod+0)
++	bool allActive = true;
  	for (auto &tag : _tags) {
--		setColorScheme(
--			tag.state & TagState::Active ? colorActive : colorInactive,
--			tag.state & TagState::Urgent);
--		renderComponent(tag.component);
-+		focused = false;
- 		auto indicators = std::min(tag.numClients, static_cast<int>(_bufs->height/2));
-+		for (auto ind = 0; ind < indicators; ind++) {
-+			if (tag.focusedClient){
-+				focused = true;
++		if (tag.state & TagState::Active){
++			if (!allActive){
++				allActive = true;
++				break;
 +			}
++			allActive = false;
 +		}
++	}
 +
-+		if (tag.state & TagState::Active || focused){
-+			setColorScheme(
-+				tag.state & TagState::Active ? colorActive : colorInactive,
-+				tag.state & TagState::Urgent);
-+			renderComponent(tag.component);
-+		}
++	bool renderThis;
++	for (auto &tag : _tags) {
++		renderThis = false;
+ 		setColorScheme(
+ 			tag.state & TagState::Active ? colorActive : colorInactive,
+ 			tag.state & TagState::Urgent);
+-		renderComponent(tag.component);
++		// Reder active tag if it's the only one active
++		if (!allActive && tag.state & TagState::Active)
++			renderThis = true;
+ 		auto indicators = std::min(tag.numClients, static_cast<int>(_bufs->height/2));
  		for (auto ind = 0; ind < indicators; ind++) {
++			// render tags having indicators
++			if (tag.focusedClient == -1)
++				renderThis = true;
++			// render tags having the focused client
++			if (tag.focusedClient == 0){
++				renderThis = true;
++			}
  			auto w = ind == tag.focusedClient ? 7 : 1;
  			cairo_move_to(_painter, tag.component.x, ind*2+0.5);
+ 			cairo_rel_line_to(_painter, w, 0);
+@@ -254,6 +277,8 @@ void Bar::renderTags()
+ 			cairo_set_line_width(_painter, 1);
+ 			cairo_stroke(_painter);
+ 		}
++		if (renderThis)
++			renderComponent(tag.component);
+ 	}
+ }
+ 

contrib/ipc.patch

@@ -193,7 +193,7 @@ index 0000000..390f5a1
 +	</interface>
 +</protocol>
 diff --git a/src/common.hpp b/src/common.hpp
-index aed4480..12a3e2e 100644
+index c905358..9b62a94 100644
 --- a/src/common.hpp
 +++ b/src/common.hpp
 @@ -10,6 +10,7 @@
@@ -219,7 +219,7 @@ index aed4480..12a3e2e 100644
  void spawn(Monitor&, const Arg& arg);
  void setCloexec(int fd);
  [[noreturn]] void die(const char* why);
-@@ -59,6 +67,7 @@ WL_DELETER(wl_output, wl_output_release);
+@@ -65,6 +73,7 @@ WL_DELETER(wl_output, wl_output_release_checked);
  WL_DELETER(wl_pointer, wl_pointer_release);
  WL_DELETER(wl_seat, wl_seat_release);
  WL_DELETER(wl_surface, wl_surface_destroy);
@@ -250,7 +250,7 @@ index 40a8c95..a9560cb 100644
  	{ ClkStatusText,   BTN_RIGHT,  spawn,      {.v = termcmd} },
  };
 diff --git a/src/main.cpp b/src/main.cpp
-index 6198d8b..9e7549a 100644
+index 6274959..01be870 100644
 --- a/src/main.cpp
 +++ b/src/main.cpp
 @@ -3,7 +3,6 @@
@@ -403,8 +403,8 @@ index 6198d8b..9e7549a 100644
 -	wl_display_roundtrip(display); // wait for xdg_output names before we read stdin
  }
  
- void setupStatusFifo()
-@@ -259,66 +331,6 @@ void setupStatusFifo()
+ bool createFifo(std::string path)
+@@ -273,68 +345,6 @@ void setupStatusFifo()
  	}
  }
  
@@ -435,7 +435,8 @@ index 6198d8b..9e7549a 100644
 -		return;
 -	if (command == "title") {
 -		auto title = std::string {};
-- 		std::getline(stream, title);
+-		stream >> std::ws;
+-		std::getline(stream, title);
 -		mon->bar.setTitle(title);
 -	} else if (command == "selmon") {
 -		uint32_t selected;
@@ -461,6 +462,7 @@ index 6198d8b..9e7549a 100644
 -		mon->tags = tags;
 -	} else if (command == "layout") {
 -		auto layout = std::string {};
+-		stream >> std::ws;
 -		std::getline(stream, layout);
 -		mon->bar.setLayout(layout);
 -	}
@@ -471,7 +473,7 @@ index 6198d8b..9e7549a 100644
  const std::string prefixStatus = "status ";
  const std::string prefixShow = "show ";
  const std::string prefixHide = "hide ";
-@@ -393,6 +405,10 @@ void onGlobalAdd(void*, wl_registry* registry, uint32_t name, const char* interf
+@@ -409,6 +419,10 @@ void onGlobalAdd(void*, wl_registry* registry, uint32_t name, const char* interf
  		xdg_wm_base_add_listener(xdgWmBase, &xdgWmBaseListener, nullptr);
  		return;
  	}
@@ -482,7 +484,7 @@ index 6198d8b..9e7549a 100644
  	if (wl_seat* wlSeat; reg.handle(wlSeat, wl_seat_interface, 7)) {
  		auto& seat = seats.emplace_back(Seat {name, wl_unique_ptr<wl_seat> {wlSeat}});
  		wl_seat_add_listener(wlSeat, &seatListener, &seat);
-@@ -494,10 +510,6 @@ int main(int argc, char* argv[])
+@@ -522,10 +536,6 @@ int main(int argc, char* argv[])
  		.fd = displayFd,
  		.events = POLLIN,
  	});
@@ -493,7 +495,7 @@ index 6198d8b..9e7549a 100644
  	if (fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK) < 0) {
  		diesys("fcntl F_SETFL");
  	}
-@@ -522,8 +534,6 @@ int main(int argc, char* argv[])
+@@ -550,8 +560,6 @@ int main(int argc, char* argv[])
  						ev.events = POLLIN;
  						waylandFlush();
  					}

contrib/markup-in-status-messages.patch

@@ -0,0 +1,65 @@
+From: Ben Collerson <benc@benc.cc>
+Date: Tue, 29 Nov 2022 11:29:15 +1000
+Subject: [PATCH] markup in status messages
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Allows pango markup to be used in status messages which allow colours to
+be used to highlight parts of status bar messages. eg:
+
+battery: full <span color="#ffff00">🔇0</span> Tue 11-20 20:10
+---
+ src/bar.cpp | 16 +++++++++++++++-
+ src/bar.hpp |  1 +
+ 2 files changed, 16 insertions(+), 1 deletion(-)
+
+diff --git a/src/bar.cpp b/src/bar.cpp
+index 507ce62..a96c547 100644
+--- a/src/bar.cpp
++++ b/src/bar.cpp
+@@ -81,6 +81,11 @@ void BarComponent::setText(const std::string& text)
+ 	pango_layout_set_text(pangoLayout.get(), _text->c_str(), _text->size());
+ }
+ 
++void BarComponent::setAttributes(PangoAttrList *attrs)
++{
++	pango_layout_set_attributes(pangoLayout.get(), attrs);
++}
++
+ Bar::Bar()
+ {
+ 	_pangoContext.reset(pango_font_map_create_context(pango_cairo_font_map_get_default()));
+@@ -156,7 +161,16 @@ void Bar::setTitle(const std::string& title)
+ }
+ void Bar::setStatus(const std::string& status)
+ {
+-	_statusCmp.setText(status);
++	char *buf;
++	GError *error = NULL;
++	PangoAttrList *attrs;
++	if (pango_parse_markup(status.c_str(), -1, 0, &attrs, &buf, NULL, &error)) {
++		_statusCmp.setText(buf);
++		_statusCmp.setAttributes(attrs);
++	}
++	else {
++		_statusCmp.setText(error->message);
++	}
+ }
+ 
+ void Bar::invalidate()
+diff --git a/src/bar.hpp b/src/bar.hpp
+index 176a1bc..dfc2043 100644
+--- a/src/bar.hpp
++++ b/src/bar.hpp
+@@ -17,6 +17,7 @@ public:
+ 	explicit BarComponent(wl_unique_ptr<PangoLayout> layout);
+ 	int width() const;
+ 	void setText(const std::string& text);
++	void setAttributes(PangoAttrList *attrs);
+ 	wl_unique_ptr<PangoLayout> pangoLayout;
+ 	int x {0};
+ };
+-- 
+2.38.1
+

contrib/show-status-on-selected-monitor.patch

@@ -0,0 +1,43 @@
+From 1ca4603b79e888980fb46d5dc6aa0d6f8afa2b3c Mon Sep 17 00:00:00 2001
+From: Ben Collerson <benc@benc.cc>
+Date: Mon, 28 Nov 2022 13:22:16 +1000
+Subject: [PATCH] show status on selected monitor
+
+---
+ src/bar.cpp  | 7 ++++++-
+ src/main.cpp | 1 +
+ 2 files changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/src/bar.cpp b/src/bar.cpp
+index 507ce62..f962927 100644
+--- a/src/bar.cpp
++++ b/src/bar.cpp
+@@ -156,7 +156,12 @@ void Bar::setTitle(const std::string& title)
+ }
+ void Bar::setStatus(const std::string& status)
+ {
+-	_statusCmp.setText(status);
++	if (_selected) {
++		_statusCmp.setText(status);
++	}
++	else {
++		_statusCmp.setText("");
++	}
+ }
+ 
+ void Bar::invalidate()
+diff --git a/src/main.cpp b/src/main.cpp
+index 6274959..c6fd401 100644
+--- a/src/main.cpp
++++ b/src/main.cpp
+@@ -307,6 +307,7 @@ static void handleStdin(const std::string& line)
+ 		uint32_t selected;
+ 		stream >> selected;
+ 		mon->bar.setSelected(selected);
++		mon->bar.setStatus(lastStatus);
+ 		if (selected) {
+ 			selmon = &*mon;
+ 		} else if (selmon == &*mon) {
+-- 
+2.38.1
+

src/bar.cpp

@@ -142,6 +142,16 @@ void Bar::setTag(int tag, int state, int numClients, int focusedClient)
 	t.focusedClient = focusedClient;
 }
 
+uint32_t Bar::getSelectedTagNumClients()
+{
+	for (auto &tag : _tags) {
+		if (tag.state == TagState::Active) {
+			return tag.numClients;
+		}
+	}
+	return 0;
+}
+
 void Bar::setSelected(bool selected)
 {
 	_selected = selected;
@@ -181,7 +191,7 @@ void Bar::click(Monitor* mon, int x, int, int btn)
 		control = ClkWinTitle;
 	} else if (x > _layoutCmp.x) {
 		control = ClkLayoutSymbol;
-	} else for (auto tag = _tags.size()-1; tag >= 0; tag--) {
+	} else for (int tag = _tags.size()-1; tag >= 0; tag--) {
 		if (x > _tags[tag].component.x) {
 			control = ClkTagBar;
 			arg.ui = 1<<tag;
@@ -200,7 +210,7 @@ void Bar::click(Monitor* mon, int x, int, int btn)
 void Bar::layerSurfaceConfigure(uint32_t serial, uint32_t width, uint32_t height)
 {
 	zwlr_layer_surface_v1_ack_configure(_layerSurface.get(), serial);
-	if (width == _bufs->width && height == _bufs->height) {
+	if (_bufs && width == _bufs->width && height == _bufs->height) {
 		return;
 	}
 	_bufs.emplace(width, height, WL_SHM_FORMAT_XRGB8888);
@@ -241,22 +251,52 @@ void Bar::render()
 void Bar::renderTags()
 {
 	for (auto &tag : _tags) {
-		setColorScheme(
-			tag.state & TagState::Active ? colorActive : colorInactive,
-			tag.state & TagState::Urgent);
+		setTagColorScheme(tag);
 		renderComponent(tag.component);
 		auto indicators = std::min(tag.numClients, static_cast<int>(_bufs->height/2));
-		for (auto ind = 0; ind < indicators; ind++) {
-			auto w = ind == tag.focusedClient ? 7 : 1;
-			cairo_move_to(_painter, tag.component.x, ind*2+0.5);
-			cairo_rel_line_to(_painter, w, 0);
-			cairo_close_path(_painter);
-			cairo_set_line_width(_painter, 1);
-			cairo_stroke(_painter);
+		if (showIndicators == 1) {
+			renderSingleIndicator(tag, indicators);
+		} else if (showIndicators == 2) {
+			renderMultiIndicators(tag, indicators);
 		}
 	}
 }
 
+void Bar::renderMultiIndicators(const Tag& t, int inds)
+{
+	for (auto ind = 0; ind < inds; ind++) {
+		auto w = ind == t.focusedClient ? 7 : 3;
+		cairo_move_to(_painter, t.component.x, ind*2+0.5);
+		cairo_rel_line_to(_painter, w, 0);
+		cairo_close_path(_painter);
+		cairo_set_line_width(_painter, 3);
+		cairo_stroke(_painter);
+	}
+}
+
+void Bar::renderSingleIndicator(const Tag& t, int inds)
+{
+	if (inds > 0) {
+		auto w = 4;
+		setColorScheme(colorIndicator);
+		cairo_move_to(_painter, t.component.x+1, 1);
+		cairo_rel_line_to(_painter, w, 0);
+		cairo_rel_line_to(_painter, 0, w);
+		cairo_rel_line_to(_painter, -w, 0);
+		cairo_close_path(_painter);
+		cairo_set_line_width(_painter, 1);
+		beginFg();
+		cairo_stroke_preserve(_painter);
+		if (t.state == TagState::Active) {
+			beginBg();
+		} else {
+			setTagColorScheme(t);
+			beginBg();
+		}
+		cairo_fill(_painter);
+	}
+}
+
 void Bar::renderStatus()
 {
 	pango_cairo_update_layout(_painter, _statusCmp.pangoLayout.get());
@@ -269,6 +309,13 @@ void Bar::renderStatus()
 	renderComponent(_statusCmp);
 }
 
+void Bar::setTagColorScheme(const Tag& t)
+{
+    setColorScheme(
+        t.state & TagState::Active ? colorActive : colorInactive,
+        t.state & TagState::Urgent);
+}
+
 void Bar::setColorScheme(const ColorScheme& scheme, bool invert)
 {
 	_colorScheme = invert

src/bar.hpp

@@ -50,9 +50,12 @@ class Bar {
 	void layerSurfaceConfigure(uint32_t serial, uint32_t width, uint32_t height);
 	void render();
 	void renderTags();
+	void renderMultiIndicators(const Tag& t, int inds);
+	void renderSingleIndicator(const Tag& t, int inds);
 	void renderStatus();
 
 	// low-level rendering
+	void setTagColorScheme(const Tag& t);
 	void setColorScheme(const ColorScheme& scheme, bool invert = false);
 	void beginFg();
 	void beginBg();
@@ -65,6 +68,7 @@ public:
 	void show(wl_output* output);
 	void hide();
 	void setTag(int tag, int state, int numClients, int focusedClient);
+	uint32_t getSelectedTagNumClients();
 	void setSelected(bool selected);
 	void setLayout(const std::string& layout);
 	void setTitle(const std::string& title);

src/common.hpp

@@ -63,8 +63,14 @@ struct WlDeleter;
 template<typename T>
 using wl_unique_ptr = std::unique_ptr<T, WlDeleter<T>>;
 
+inline void wl_output_release_checked(wl_output* output) {
+	if (wl_output_get_version(output) >= WL_OUTPUT_RELEASE_SINCE_VERSION) {
+		wl_output_release(output);
+	}
+}
+
 WL_DELETER(wl_buffer, wl_buffer_destroy);
-WL_DELETER(wl_output, wl_output_release);
+WL_DELETER(wl_output, wl_output_release_checked);
 WL_DELETER(wl_pointer, wl_pointer_release);
 WL_DELETER(wl_seat, wl_seat_release);
 WL_DELETER(wl_surface, wl_surface_destroy);

src/config.hpp

@@ -14,8 +14,11 @@ constexpr const char* font = "Iosevka 11";
 
 constexpr ColorScheme colorInactive = {Color(0xff, 0xff, 0xff), Color(0x88, 0x88, 0x88)};
 constexpr ColorScheme colorActive = {Color(0xff, 0xff, 0xff), Color(0xaa, 0x44, 0x44)};
+constexpr ColorScheme colorIndicator = {Color(0xff, 0xff, 0xff), Color(0xff, 0xff, 0xff)};
 constexpr const char* termcmd[] = {"dwl_term", nullptr};
-
+constexpr int showIndicators = 1; // 0 = no indicators
+                                  // 1 = single indicator
+                                  // 2 = multiple indicators
 constexpr Button buttons[] = {
 	{ ClkTagBar,       BTN_LEFT,   view,       {0} },
 	{ ClkTagBar,       BTN_RIGHT,  tag,        {0} },

src/main.cpp

@@ -3,6 +3,7 @@
 
 #include <algorithm>
 #include <cstdio>
+#include <sstream>
 #include <list>
 #include <optional>
 #include <utility>
@@ -22,6 +23,7 @@
 #include "xdg-shell-client-protocol.h"
 #include "net-tapesoftware-dwl-wm-unstable-v1-client-protocol.h"
 #include "common.hpp"
+#include "config.hpp"
 #include "bar.hpp"
 #include "line_buffer.hpp"
 
@@ -54,6 +56,8 @@ static void updatemon(Monitor &mon);
 static void onReady();
 static void setupStatusFifo();
 static void onStatus();
+static void onStdin();
+static void handleStdin(const std::string& line);
 static void updateVisibility(const std::string& name, bool(*updater)(bool));
 static void onGlobalAdd(void*, wl_registry* registry, uint32_t name, const char* interface, uint32_t version);
 static void onGlobalRemove(void*, wl_registry* registry, uint32_t name);
@@ -246,7 +250,16 @@ static const struct znet_tapesoftware_dwl_wm_monitor_v1_listener dwlWmMonitorLis
 	},
 	.layout = [](void* mv, znet_tapesoftware_dwl_wm_monitor_v1*, uint32_t layout) {
 		auto mon = static_cast<Monitor*>(mv);
-		mon->bar.setLayout(layoutNames[layout]);
+		if (layout == 2) {
+			char lout[4] = "[M]";
+			uint32_t numc = mon->bar.getSelectedTagNumClients();
+			if (numc > 0) {
+				sprintf(lout, "[%d]", numc);
+			}
+			mon->bar.setLayout(lout);
+		} else {
+			mon->bar.setLayout(layoutNames[layout]);
+		}
 	},
 	.title = [](void* mv, znet_tapesoftware_dwl_wm_monitor_v1*, const char* title) {
 		auto mon = static_cast<Monitor*>(mv);
@@ -299,12 +312,13 @@ void onReady()
 	for (auto output : uninitializedOutputs) {
 		setupMonitor(output.first, output.second);
 	}
+	wl_display_roundtrip(display); // wait for xdg_output names before we read stdin
 }
 
 bool createFifo(std::string path)
 {
 	auto result = mkfifo(path.c_str(), 0666);
-	if (result == 0) {
+	if ((result == 0) || (errno == EEXIST)) {
 		auto fd = open(path.c_str(), O_CLOEXEC | O_NONBLOCK | O_RDONLY);
 		if (fd < 0) {
 			diesys("open status fifo reader");
@@ -345,6 +359,68 @@ void setupStatusFifo()
 	}
 }
 
+static LineBuffer<512> stdinBuffer;
+static void onStdin()
+{
+	auto res = stdinBuffer.readLines(
+		[](void* p, size_t size) { return read(0, p, size); },
+		[](char* p, size_t size) { handleStdin({p, size}); });
+	if (res == 0) {
+		quitting = true;
+	}
+}
+
+static void handleStdin(const std::string& line)
+{
+	// this parses the lines that dwl sends in printstatus()
+	std::string monName, command;
+	auto stream = std::istringstream {line};
+	stream >> monName >> command;
+	if (!stream.good()) {
+		return;
+	}
+	auto mon = std::find_if(begin(monitors), end(monitors), [&](const Monitor& mon) {
+		return mon.xdgName == monName;
+	});
+	if (mon == end(monitors))
+		return;
+	if (command == "title") {
+		auto title = std::string {};
+		stream >> std::ws;
+		std::getline(stream, title);
+		mon->bar.setTitle(title);
+	} else if (command == "selmon") {
+		uint32_t selected;
+		stream >> selected;
+		mon->bar.setSelected(selected);
+		if (selected) {
+			selmon = &*mon;
+		} else if (selmon == &*mon) {
+			selmon = nullptr;
+		}
+	} else if (command == "tags") {
+		uint32_t occupied, tags, clientTags, urgent;
+		stream >> occupied >> tags >> clientTags >> urgent;
+		for (auto i=0u; i<tagNames.size(); i++) {
+			auto tagMask = 1 << i;
+			int state = TagState::None;
+			if (tags & tagMask)
+				state |= TagState::Active;
+			if (urgent & tagMask)
+				state |= TagState::Urgent;
+			mon->bar.setTag(i, state, occupied & tagMask ? 1 : 0, clientTags & tagMask ? 0 : -1);
+		}
+		mon->tags = tags;
+	} else if (command == "layout") {
+		auto layout = std::string {};
+		stream >> std::ws;
+		std::getline(stream, layout);
+		mon->bar.setLayout(layout);
+	}
+	mon->hasData = true;
+	updatemon(*mon);
+}
+
 const std::string prefixStatus = "status ";
 const std::string prefixShow = "show ";
 const std::string prefixHide = "hide ";
@@ -536,6 +612,10 @@ int main(int argc, char* argv[])
 		.fd = displayFd,
 		.events = POLLIN,
 	});
+	pollfds.push_back({
+		.fd = STDIN_FILENO,
+		.events = POLLIN,
+	});
 	if (fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK) < 0) {
 		diesys("fcntl F_SETFL");
 	}
@@ -560,6 +640,8 @@ int main(int argc, char* argv[])
 						ev.events = POLLIN;
 						waylandFlush();
 					}
+				} else if (ev.fd == STDIN_FILENO && (ev.revents & POLLIN)) {
+					onStdin();
 				} else if (ev.fd == statusFifoFd && (ev.revents & POLLIN)) {
 					onStatus();
 				} else if (ev.fd == signalSelfPipe[0] && (ev.revents & POLLIN)) {
@@ -619,3 +701,4 @@ void diesys(const char* why) {
 	cleanup();
 	exit(1);
 }
+