Support for DWL IPC v2

* More customizations for indicators

protocols/dwl-ipc-unstable-v2.xml

@@ -0,0 +1,181 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+This is largely ripped from somebar's ipc patchset; just with some personal modifications.
+I would probably just submit raphi's patchset but I don't think that would be polite.
+-->
+<protocol name="dwl_ipc_unstable_v2">
+  <description summary="inter-proccess-communication about dwl's state">
+      This protocol allows clients to update and get updates from dwl.
+
+      Warning! The protocol described in this file is experimental and
+      backward incompatible changes may be made. Backward compatible
+      changes may be added together with the corresponding interface
+      version bump.
+      Backward incompatible changes are done by bumping the version
+      number in the protocol and interface names and resetting the
+      interface version. Once the protocol is to be declared stable,
+      the 'z' prefix and the version number in the protocol and
+      interface names are removed and the interface version number is
+      reset.
+  </description>
+
+  <interface name="zdwl_ipc_manager_v2" version="2">
+    <description summary="manage dwl state">
+      This interface is exposed as a global in wl_registry.
+
+      Clients can use this interface to get a dwl_ipc_output.
+      After binding the client will recieve the dwl_ipc_manager.tags and dwl_ipc_manager.layout events.
+      The dwl_ipc_manager.tags and dwl_ipc_manager.layout events expose tags and layouts to the client.
+    </description>
+
+    <request name="release" type="destructor">
+      <description summary="release dwl_ipc_manager">
+        Indicates that the client will not the dwl_ipc_manager object anymore.
+        Objects created through this instance are not affected.
+      </description>
+    </request>
+
+    <request name="get_output">
+      <description summary="get a dwl_ipc_outout for a wl_output">
+        Get a dwl_ipc_outout for the specified wl_output.
+      </description>
+      <arg name="id" type="new_id" interface="zdwl_ipc_output_v2"/>
+      <arg name="output" type="object" interface="wl_output"/>
+    </request>
+
+    <event name="tags">
+      <description summary="Announces tag amount">
+        This event is sent after binding.
+        A roundtrip after binding guarantees the client recieved all tags.
+      </description>
+      <arg name="amount" type="uint"/>
+    </event>
+
+    <event name="layout">
+      <description summary="Announces a layout">
+        This event is sent after binding.
+        A roundtrip after binding guarantees the client recieved all layouts.
+      </description>
+      <arg name="name" type="string"/>
+    </event>
+  </interface>
+
+  <interface name="zdwl_ipc_output_v2" version="2">
+    <description summary="control dwl output">
+      Observe and control a dwl output.
+
+      Events are double-buffered:
+      Clients should cache events and redraw when a dwl_ipc_output.frame event is sent.
+
+      Request are not double-buffered:
+      The compositor will update immediately upon request.
+    </description>
+
+    <enum name="tag_state">
+      <entry name="none" value="0" summary="no state"/>
+      <entry name="active" value="1" summary="tag is active"/>
+      <entry name="urgent" value="2" summary="tag has at least one urgent client"/>
+    </enum>
+
+    <request name="release" type="destructor">
+      <description summary="release dwl_ipc_outout">
+        Indicates to that the client no longer needs this dwl_ipc_output.
+      </description>
+    </request>
+
+    <event name="toggle_visibility">
+      <description summary="Toggle client visibilty">
+        Indicates the client should hide or show themselves.
+        If the client is visible then hide, if hidden then show.
+      </description>
+    </event>
+
+    <event name="active">
+      <description summary="Update the selected output.">
+        Indicates if the output is active. Zero is invalid, nonzero is valid.
+      </description>
+      <arg name="active" type="uint"/>
+    </event>
+
+    <event name="tag">
+      <description summary="Update the state of a tag.">
+        Indicates that a tag has been updated.
+      </description>
+      <arg name="tag" type="uint" summary="Index of the tag"/>
+      <arg name="state" type="uint" enum="tag_state" summary="The state of the tag."/>
+      <arg name="clients" type="uint" summary="The number of clients in the tag."/>
+      <arg name="focused" type="uint" summary="If there is a focused client. Nonzero being valid, zero being invalid."/>
+    </event>
+
+    <event name="layout">
+      <description summary="Update the layout.">
+        Indicates a new layout is selected.
+      </description>
+      <arg name="layout" type="uint" summary="Index of the layout."/>
+    </event>
+
+    <event name="title">
+      <description summary="Update the title.">
+        Indicates the title has changed.
+      </description>
+      <arg name="title" type="string" summary="The new title name."/>
+    </event>
+
+    <event name="appid" since="1">
+      <description summary="Update the appid.">
+        Indicates the appid has changed.
+      </description>
+      <arg name="appid" type="string" summary="The new appid."/>
+    </event>
+
+    <event name="layout_symbol" since="1">
+      <description summary="Update the current layout symbol">
+          Indicates the layout has changed. Since layout symbols are dynamic.
+          As opposed to the zdwl_ipc_manager.layout event, this should take precendence when displaying.
+          You can ignore the zdwl_ipc_output.layout event.
+      </description>
+      <arg name="layout" type="string" summary="The new layout"/>
+    </event>
+
+    <event name="frame">
+      <description summary="The update sequence is done.">
+        Indicates that a sequence of status updates have finished and the client should redraw.
+      </description>
+    </event>
+
+    <request name="set_tags">
+      <description summary="Set the active tags of this output"/>
+      <arg name="tagmask" type="uint" summary="bitmask of the tags that should be set."/>
+      <arg name="toggle_tagset" type="uint" summary="toggle the selected tagset, zero for invalid, nonzero for valid."/>
+    </request>
+
+    <request name="set_client_tags">
+      <description summary="Set the tags of the focused client.">
+        The tags are updated as follows:
+        new_tags = (current_tags AND and_tags) XOR xor_tags
+      </description>
+      <arg name="and_tags" type="uint"/>
+      <arg name="xor_tags" type="uint"/>
+    </request>
+
+    <request name="set_layout">
+      <description summary="Set the layout of this output"/>
+      <arg name="index" type="uint" summary="index of a layout recieved by dwl_ipc_manager.layout"/>
+    </request>
+
+    <!-- Version 2 -->
+    <event name="fullscreen" since="2">
+      <description summary="Update fullscreen status">
+          Indicates if the selected client on this output is fullscreen.
+      </description>
+      <arg name="is_fullscreen" type="uint" summary="If the selected client is fullscreen. Nonzero is valid, zero invalid"/>
+    </event>
+
+    <event name="floating" since="2">
+      <description summary="Update the floating status">
+          Indicates if the selected client on this output is floating.
+      </description>
+      <arg name="is_floating" type="uint" summary="If the selected client is floating. Nonzero is valid, zero invalid"/>
+    </event>
+  </interface>
+</protocol>

protocols/meson.build

@@ -15,6 +15,7 @@ wayland_xmls = [
 	wl_protocol_dir + '/stable/xdg-shell/xdg-shell.xml',
 	wl_protocol_dir + '/unstable/xdg-output/xdg-output-unstable-v1.xml',
 	'wlr-layer-shell-unstable-v1.xml',
+	'dwl-ipc-unstable-v2.xml',
 ]
 wayland_sources = [
 	wayland_scanner_code.process(wayland_xmls),

src/bar.cpp

@@ -87,8 +87,9 @@ Bar::Bar()
 	if (!_pangoContext) {
 		die("pango_font_map_create_context");
 	}
-	for (const auto& tagName : tagNames) {
+	//for (const auto& tagName : tagNames) {
-		_tags.push_back({ TagState::None, 0, 0, createComponent(tagName) });
+	for (int ti = 1; ti < 10; ti++ ) {
+		_tags.push_back({ TagState::None, 0, 0, createComponent(std::to_string(ti)) });
 	}
 	_layoutCmp = createComponent();
 	_titleCmp = createComponent();
@@ -142,6 +143,16 @@ 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;
@@ -241,19 +252,49 @@ void Bar::render()
 void Bar::renderTags()
 {
 	for (auto &tag : _tags) {
-		setColorScheme(
+		setTagColorScheme(tag);
-			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++) {
+		if (showIndicators == 1) {
-			auto w = ind == tag.focusedClient ? 7 : 1;
+			renderSingleIndicator(tag, indicators);
-			cairo_move_to(_painter, tag.component.x, ind*2+0.5);
+		} 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, 1);
+		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);
 	}
 }
 
@@ -273,6 +314,13 @@ void Bar::renderStatus()
 	}
 }
 
+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

@@ -5,11 +5,14 @@
 #include <memory>
 #include <string>
 #include <vector>
+#include <iostream>
+#include <fstream>
 #include <wayland-client.h>
 #include <linux/input-event-codes.h>
 #include <cairo/cairo.h>
 #include <pango/pango.h>
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
+#include "dwl-ipc-unstable-v2-client-protocol.h"
 
 struct Color {
 	Color() {}
@@ -38,6 +41,14 @@ extern wl_display* display;
 extern wl_compositor* compositor;
 extern wl_shm* shm;
 extern zwlr_layer_shell_v1* wlrLayerShell;
+static std::vector<std::string> tagNames;
+static std::vector<std::string> layoutNames;
+
+void view(Monitor& m, const Arg& arg);
+void toggleview(Monitor& m, const Arg& arg);
+void setlayout(Monitor& m, const Arg& arg);
+void tag(Monitor& m, const Arg& arg);
+void toggletag(Monitor& m, const Arg& arg);
 
 void spawn(Monitor&, const Arg& arg);
 void setCloexec(int fd);
@@ -65,6 +76,7 @@ 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);
+WL_DELETER(zdwl_ipc_output_v2, zdwl_ipc_output_v2_destroy);
 WL_DELETER(zwlr_layer_surface_v1, zwlr_layer_surface_v1_destroy);
 
 WL_DELETER(cairo_t, cairo_destroy);

src/main.cpp

@@ -21,6 +21,7 @@
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
 #include "xdg-output-unstable-v1-client-protocol.h"
 #include "xdg-shell-client-protocol.h"
+#include "dwl-ipc-unstable-v2-client-protocol.h"
 #include "common.hpp"
 #include "config.hpp"
 #include "bar.hpp"
@@ -34,6 +35,7 @@ struct Monitor {
 	bool desiredVisibility {true};
 	bool hasData;
 	uint32_t tags;
+	wl_unique_ptr<zdwl_ipc_output_v2> dwlMonitor;
 };
 
 struct SeatPointer {
@@ -67,6 +69,8 @@ wl_display* display;
 wl_compositor* compositor;
 wl_shm* shm;
 zwlr_layer_shell_v1* wlrLayerShell;
+zdwl_ipc_manager_v2* dwlWm;
+char* log_txt;
 static xdg_wm_base* xdgWmBase;
 static zxdg_output_manager_v1* xdgOutputManager;
 static wl_surface* cursorSurface;
@@ -85,6 +89,26 @@ static int statusFifoFd {-1};
 static int statusFifoWriter {-1};
 static bool quitting {false};
 
+void view(Monitor& m, const Arg& arg)
+{
+	zdwl_ipc_output_v2_set_tags(m.dwlMonitor.get(), arg.ui, 1);
+}
+void toggleview(Monitor& m, const Arg& arg)
+{
+	zdwl_ipc_output_v2_set_tags(m.dwlMonitor.get(), m.tags ^ arg.ui, 0);
+}
+void setlayout(Monitor& m, const Arg& arg)
+{
+	zdwl_ipc_output_v2_set_layout(m.dwlMonitor.get(), arg.ui);
+}
+void tag(Monitor& m, const Arg& arg)
+{
+	zdwl_ipc_output_v2_set_client_tags(m.dwlMonitor.get(), 0, arg.ui);
+}
+void toggletag(Monitor& m, const Arg& arg)
+{
+	zdwl_ipc_output_v2_set_client_tags(m.dwlMonitor.get(), ~0, arg.ui);
+}
 void spawn(Monitor&, const Arg& arg)
 {
 	if (fork() == 0) {
@@ -189,11 +213,88 @@ static const struct wl_seat_listener seatListener = {
 	.name = [](void*, wl_seat*, const char* name) { }
 };
 
+static const struct zdwl_ipc_manager_v2_listener dwlWmListener = {
+	.tags = [](void*, zdwl_ipc_manager_v2*, uint32_t tag_cnt) {
+		for (uint32_t ti=0; ti<=tag_cnt; ti++) {
+			tagNames.push_back(std::to_string(ti));
+		}
+	},
+	.layout = [](void*, zdwl_ipc_manager_v2*, const char* name) {
+		layoutNames.push_back(name);
+	},
+};
+
+static const struct zdwl_ipc_output_v2_listener dwlWmMonitorListener {
+	.toggle_visibility = [](void* mv, zdwl_ipc_output_v2*) {
+	},
+	.active = [](void* mv, zdwl_ipc_output_v2*, uint32_t active) {
+		auto mon = static_cast<Monitor*>(mv);
+		if (active) {
+			selmon = mon;
+		} else if (selmon == mon) {
+			selmon = nullptr;
+		}
+		mon->bar.setSelected(active);
+	},
+	.tag = [](void* mv, zdwl_ipc_output_v2*, uint32_t tag, uint32_t state, uint32_t numClients, uint32_t focusedClient) {
+		auto mon = static_cast<Monitor*>(mv);
+		int tagState = TagState::None;
+		if (state & ZDWL_IPC_OUTPUT_V2_TAG_STATE_ACTIVE)
+			tagState |= TagState::Active;
+		if (state & ZDWL_IPC_OUTPUT_V2_TAG_STATE_URGENT)
+			tagState |= TagState::Urgent;
+		mon->bar.setTag(tag, tagState, numClients, focusedClient);
+		uint32_t mask = 1 << tag;
+		if (tagState & TagState::Active) {
+			mon->tags |= mask;
+		} else {
+			mon->tags &= ~mask;
+		}
+	},
+	.layout = [](void* mv, zdwl_ipc_output_v2*, uint32_t layout) {
+		auto mon = static_cast<Monitor*>(mv);
+		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, zdwl_ipc_output_v2*, const char* title) {
+		auto mon = static_cast<Monitor*>(mv);
+		mon->bar.setTitle(title);
+	},
+	.appid = [](void* mv, zdwl_ipc_output_v2*, const char* appid) {
+		//auto mon = static_cast<Monitor*>(mv);
+	},
+	.layout_symbol = [](void* mv, zdwl_ipc_output_v2*, const char* layout) {
+		auto mon = static_cast<Monitor*>(mv);
+		mon->bar.setLayout(layout);
+	},
+	.frame = [](void* mv, zdwl_ipc_output_v2*) {
+		auto mon = static_cast<Monitor*>(mv);
+		mon->hasData = true;
+		updatemon(*mon);
+	},
+	.fullscreen = [](void* mv, zdwl_ipc_output_v2*, uint32_t is_fullscreen) {
+		// auto mon = static_cast<Monitor*>(mv);
+	},
+	.floating = [](void* mv, zdwl_ipc_output_v2*, uint32_t is_floating) {
+		//auto mon = static_cast<Monitor*>(mv);
+	}
+};
+
 void setupMonitor(uint32_t name, wl_output* output) {
 	auto& monitor = monitors.emplace_back(Monitor {name, {}, wl_unique_ptr<wl_output> {output}});
 	monitor.bar.setStatus(lastStatus);
 	auto xdgOutput = zxdg_output_manager_v1_get_xdg_output(xdgOutputManager, monitor.wlOutput.get());
 	zxdg_output_v1_add_listener(xdgOutput, &xdgOutputListener, &monitor);
+	monitor.dwlMonitor.reset(zdwl_ipc_manager_v2_get_output(dwlWm, monitor.wlOutput.get()));
+	zdwl_ipc_output_v2_add_listener(monitor.dwlMonitor.get(), &dwlWmMonitorListener, &monitor);
 }
 
 void updatemon(Monitor& mon)
@@ -219,6 +320,7 @@ void onReady()
 	requireGlobal(shm, "wl_shm");
 	requireGlobal(wlrLayerShell, "zwlr_layer_shell_v1");
 	requireGlobal(xdgOutputManager, "zxdg_output_manager_v1");
+	requireGlobal(dwlWm, "zdwl_ipc_manager_v2_interface");
 	setupStatusFifo();
 	wl_display_roundtrip(display); // roundtrip so we receive all dwl tags etc.
 
@@ -232,7 +334,8 @@ void onReady()
 bool createFifo(std::string path)
 {
 	auto result = mkfifo(path.c_str(), 0666);
-	if (result == 0) {
+	// 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");
@@ -276,6 +379,7 @@ void setupStatusFifo()
 static LineBuffer<512> stdinBuffer;
 static void onStdin()
 {
+	return;
 	auto res = stdinBuffer.readLines(
 		[](void* p, size_t size) { return read(0, p, size); },
 		[](char* p, size_t size) { handleStdin({p, size}); });
@@ -409,6 +513,10 @@ void onGlobalAdd(void*, wl_registry* registry, uint32_t name, const char* interf
 		xdg_wm_base_add_listener(xdgWmBase, &xdgWmBaseListener, nullptr);
 		return;
 	}
+	if (reg.handle(dwlWm, zdwl_ipc_manager_v2_interface, 1)) {
+		zdwl_ipc_manager_v2_add_listener(dwlWm, &dwlWmListener, nullptr);
+		return;
+	}
 	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);
@@ -436,6 +544,7 @@ static const struct wl_registry_listener registry_listener = {
 int main(int argc, char* argv[])
 {
 	int opt;
+
 	while ((opt = getopt(argc, argv, "chvs:")) != -1) {
 		switch (opt) {
 			case 's':