ipc-somebar.patch

From ee60f05038588acc68e5a8495e77dea75c6d6efa Mon Sep 17 00:00:00 2001
From: Palanix <palanixyt@gmail.com>
Date: Mon, 20 Feb 2023 11:07:10 +0100
Subject: [PATCH] ipc

---
 Makefile                                      |  14 +-
 dwl.c                                         | 210 ++++++++++++++++++
 .../net-tapesoftware-dwl-wm-unstable-v1.xml   | 164 ++++++++++++++
 3 files changed, 385 insertions(+), 3 deletions(-)
 create mode 100644 protocols/net-tapesoftware-dwl-wm-unstable-v1.xml

diff --git a/Makefile b/Makefile
index ccca079..d72dea8 100644
--- a/Makefile
+++ b/Makefile
@@ -14,9 +14,9 @@ DWLCFLAGS = `$(PKG_CONFIG) --cflags $(PKGS)` $(DWLCPPFLAGS) $(DWLDEVCFLAGS) $(CF
 LDLIBS    = `$(PKG_CONFIG) --libs $(PKGS)` $(LIBS)
 
 all: dwl
-dwl: dwl.o util.o
-	$(CC) dwl.o util.o $(LDLIBS) $(LDFLAGS) $(DWLCFLAGS) -o $@
-dwl.o: dwl.c config.mk config.h client.h xdg-shell-protocol.h wlr-layer-shell-unstable-v1-protocol.h
+dwl: dwl.o util.o net-tapesoftware-dwl-wm-unstable-v1-protocol.o
+	$(CC) dwl.o util.o net-tapesoftware-dwl-wm-unstable-v1-protocol.o $(LDLIBS) $(LDFLAGS) $(DWLCFLAGS) -o $@
+dwl.o: dwl.c config.mk config.h client.h xdg-shell-protocol.h wlr-layer-shell-unstable-v1-protocol.h net-tapesoftware-dwl-wm-unstable-v1-protocol.o
 util.o: util.c util.h
 
 # wayland-scanner is a tool which generates C headers and rigging for Wayland
@@ -32,6 +32,14 @@ wlr-layer-shell-unstable-v1-protocol.h:
 	$(WAYLAND_SCANNER) server-header \
 		protocols/wlr-layer-shell-unstable-v1.xml $@
 
+net-tapesoftware-dwl-wm-unstable-v1-protocol.h: protocols/net-tapesoftware-dwl-wm-unstable-v1.xml
+	$(WAYLAND_SCANNER) server-header \
+		protocols/net-tapesoftware-dwl-wm-unstable-v1.xml $@
+net-tapesoftware-dwl-wm-unstable-v1-protocol.c: protocols/net-tapesoftware-dwl-wm-unstable-v1.xml
+	$(WAYLAND_SCANNER) private-code \
+		protocols/net-tapesoftware-dwl-wm-unstable-v1.xml $@
+net-tapesoftware-dwl-wm-unstable-v1-protocol.o: net-tapesoftware-dwl-wm-unstable-v1-protocol.h
+
 config.h:
 	cp config.def.h $@
 clean:
diff --git a/dwl.c b/dwl.c
index 8043bf9..f2977fc 100644
--- a/dwl.c
+++ b/dwl.c
@@ -52,6 +52,7 @@
 #include <wlr/types/wlr_xdg_shell.h>
 #include <wlr/util/log.h>
 #include <xkbcommon/xkbcommon.h>
+#include "net-tapesoftware-dwl-wm-unstable-v1-protocol.h"
 #ifdef XWAYLAND
 #include <wlr/xwayland.h>
 #include <X11/Xlib.h>
@@ -172,6 +173,12 @@ typedef struct {
 	void (*arrange)(Monitor *);
 } Layout;
 
+typedef struct {
+	struct wl_list link;
+	struct wl_resource *resource;
+	struct Monitor *monitor;
+} DwlWmMonitor;
+
 struct Monitor {
 	struct wl_list link;
 	struct wlr_output *wlr_output;
@@ -184,6 +191,7 @@ struct Monitor {
 	struct wlr_box m; /* monitor area, layout-relative */
 	struct wlr_box w; /* window area, layout-relative */
 	struct wl_list layers[4]; /* LayerSurface::link */
+	struct wl_list dwl_wm_monitor_link;
 	const Layout *lt[2];
 	unsigned int seltags;
 	unsigned int sellt;
@@ -318,6 +326,10 @@ static struct wlr_scene_node *xytonode(double x, double y, struct wlr_surface **
 		Client **pc, LayerSurface **pl, double *nx, double *ny);
 static void zoom(const Arg *arg);
 
+static void dwl_wm_bind(struct wl_client *client, void *data,
+		uint32_t version, uint32_t id);
+static void dwl_wm_printstatus(Monitor *monitor);
+
 /* variables */
 static const char broken[] = "broken";
 static const char *cursor_image = "left_ptr";
@@ -685,6 +697,7 @@ void
 cleanupmon(struct wl_listener *listener, void *data)
 {
 	Monitor *m = wl_container_of(listener, m, destroy);
+	DwlWmMonitor *mon, *montmp;
 	LayerSurface *l, *tmp;
 	int i;
 
@@ -697,6 +710,10 @@ cleanupmon(struct wl_listener *listener, void *data)
 	wl_list_remove(&m->link);
 	m->wlr_output->data = NULL;
 	wlr_output_layout_remove(output_layout, m->wlr_output);
+	wl_list_for_each_safe(mon, montmp, &m->dwl_wm_monitor_link, link) {
+			wl_resource_set_user_data(mon->resource, NULL);
+			free(mon);
+	}
 	wlr_scene_output_destroy(m->scene_output);
 	wlr_scene_node_destroy(&m->fullscreen_bg->node);
 
@@ -903,6 +920,7 @@ createmon(struct wl_listener *listener, void *data)
 	const MonitorRule *r;
 	size_t i;
 	Monitor *m = wlr_output->data = ecalloc(1, sizeof(*m));
+	wl_list_init(&m->dwl_wm_monitor_link);
 	m->wlr_output = wlr_output;
 
 	wlr_output_init_render(wlr_output, alloc, drw);
@@ -1852,6 +1870,7 @@ printstatus(void)
 		printf("%s tags %u %u %u %u\n", m->wlr_output->name, occ, m->tagset[m->seltags],
 				sel, urg);
 		printf("%s layout %s\n", m->wlr_output->name, m->lt[m->sellt]->symbol);
+		dwl_wm_printstatus(m);
 	}
 	fflush(stdout);
 }
@@ -2289,6 +2308,7 @@ setup(void)
 	wl_signal_add(&output_mgr->events.test, &output_mgr_test);
 
 	wlr_scene_set_presentation(scene, wlr_presentation_create(dpy, backend));
+	wl_global_create(dpy, &znet_tapesoftware_dwl_wm_v1_interface, 1, NULL, dwl_wm_bind);
 
 #ifdef XWAYLAND
 	/*
@@ -2828,3 +2848,193 @@ main(int argc, char *argv[])
 usage:
 	die("Usage: %s [-v] [-s startup command]", argv[0]);
 }
+
+/* dwl_wm_monitor_v1 */
+static void
+dwl_wm_monitor_handle_release(struct wl_client *client, struct wl_resource *resource)
+{
+	wl_resource_destroy(resource);
+}
+
+static void
+dwl_wm_monitor_handle_destroy(struct wl_resource *resource)
+{
+	DwlWmMonitor *mon = wl_resource_get_user_data(resource);
+	if (mon) {
+		wl_list_remove(&mon->link);
+		free(mon);
+	}
+}
+
+static void
+dwl_wm_printstatus_to(Monitor *m, const DwlWmMonitor *mon)
+{
+	Client *c, *focused;
+	int tagmask, state, numclients, focused_client;
+	focused = focustop(m);
+	znet_tapesoftware_dwl_wm_monitor_v1_send_selected(mon->resource, m == selmon);
+
+	for (int tag = 0; tag<LENGTH(tags); tag++) {
+		numclients = state = 0;
+		focused_client = -1;
+		tagmask = 1 << tag;
+		if ((tagmask & m->tagset[m->seltags]) != 0)
+			state = state | ZNET_TAPESOFTWARE_DWL_WM_MONITOR_V1_TAG_STATE_ACTIVE;
+		wl_list_for_each(c, &clients, link) {
+			if (c->mon != m)
+				continue;
+			if (!(c->tags & tagmask))
+				continue;
+			if (c == focused)
+				focused_client = numclients;
+			numclients++;
+			if (c->isurgent)
+				state = state | ZNET_TAPESOFTWARE_DWL_WM_MONITOR_V1_TAG_STATE_URGENT;
+		}
+		znet_tapesoftware_dwl_wm_monitor_v1_send_tag(mon->resource,
+			tag, state, numclients, focused_client);
+	}
+	znet_tapesoftware_dwl_wm_monitor_v1_send_layout(mon->resource, m->lt[m->sellt] - layouts);
+	znet_tapesoftware_dwl_wm_monitor_v1_send_title(mon->resource,
+		focused ? client_get_title(focused) : "");
+	znet_tapesoftware_dwl_wm_monitor_v1_send_frame(mon->resource);
+}
+
+static void
+dwl_wm_printstatus(Monitor *m)
+{
+	DwlWmMonitor *mon;
+	wl_list_for_each(mon, &m->dwl_wm_monitor_link, link) {
+		dwl_wm_printstatus_to(m, mon);
+	}
+}
+
+static void
+dwl_wm_monitor_handle_set_tags(struct wl_client *client, struct wl_resource *resource,
+	uint32_t t, uint32_t toggle_tagset)
+{
+	DwlWmMonitor *mon;
+	Monitor *m;
+	mon = wl_resource_get_user_data(resource);
+	if (!mon)
+		return;
+	m = mon->monitor;
+	if ((t & TAGMASK) == m->tagset[m->seltags])
+		return;
+	if (toggle_tagset)
+		m->seltags ^= 1;
+	if (t & TAGMASK)
+		m->tagset[m->seltags] = t & TAGMASK;
+
+	focusclient(focustop(m), 1);
+	arrange(m);
+	printstatus();
+}
+
+static void
+dwl_wm_monitor_handle_set_layout(struct wl_client *client, struct wl_resource *resource,
+	uint32_t layout)
+{
+	DwlWmMonitor *mon;
+	Monitor *m;
+	mon = wl_resource_get_user_data(resource);
+	if (!mon)
+		return;
+	m = mon->monitor;
+	if (layout >= LENGTH(layouts))
+		return;
+	if (layout != m->lt[m->sellt] - layouts)
+		m->sellt ^= 1;
+
+	m->lt[m->sellt] = &layouts[layout];
+	arrange(m);
+	printstatus();
+}
+
+static void
+dwl_wm_monitor_handle_set_client_tags(struct wl_client *client, struct wl_resource *resource,
+	uint32_t and, uint32_t xor)
+{
+	DwlWmMonitor *mon;
+	Client *sel;
+	unsigned int newtags;
+	mon = wl_resource_get_user_data(resource);
+	if (!mon)
+		return;
+	sel = focustop(mon->monitor);
+	if (!sel)
+		return;
+	newtags = (sel->tags & and) ^ xor;
+	if (newtags) {
+		sel->tags = newtags;
+		focusclient(focustop(selmon), 1);
+		arrange(selmon);
+		printstatus();
+	}
+}
+
+static const struct znet_tapesoftware_dwl_wm_monitor_v1_interface dwl_wm_monitor_implementation = {
+	.release = dwl_wm_monitor_handle_release,
+	.set_tags = dwl_wm_monitor_handle_set_tags,
+	.set_layout = dwl_wm_monitor_handle_set_layout,
+	.set_client_tags = dwl_wm_monitor_handle_set_client_tags,
+};
+
+/* dwl_wm_v1 */
+static void
+dwl_wm_handle_release(struct wl_client *client, struct wl_resource *resource)
+{
+	wl_resource_destroy(resource);
+}
+
+static void
+dwl_wm_handle_get_monitor(struct wl_client *client, struct wl_resource *resource,
+	uint32_t id, struct wl_resource *output)
+{
+	DwlWmMonitor *dwl_wm_monitor;
+	struct wlr_output *wlr_output = wlr_output_from_resource(output);
+	struct Monitor *m = wlr_output->data;
+	struct wl_resource *dwlOutputResource = wl_resource_create(client,
+		&znet_tapesoftware_dwl_wm_monitor_v1_interface, wl_resource_get_version(resource), id);
+	if (!resource) {
+		wl_client_post_no_memory(client);
+		return;
+	}
+	dwl_wm_monitor = calloc(1, sizeof(DwlWmMonitor));
+	dwl_wm_monitor->resource = dwlOutputResource;
+	dwl_wm_monitor->monitor = m;
+	wl_resource_set_implementation(dwlOutputResource, &dwl_wm_monitor_implementation,
+	dwl_wm_monitor, dwl_wm_monitor_handle_destroy);
+	wl_list_insert(&m->dwl_wm_monitor_link, &dwl_wm_monitor->link);
+	dwl_wm_printstatus_to(m, dwl_wm_monitor);
+}
+
+static void
+dwl_wm_handle_destroy(struct wl_resource *resource)
+{
+	/* no state to destroy */
+}
+
+static const struct znet_tapesoftware_dwl_wm_v1_interface dwl_wm_implementation = {
+	.release = dwl_wm_handle_release,
+	.get_monitor = dwl_wm_handle_get_monitor,
+};
+
+static void
+dwl_wm_bind(struct wl_client *client, void *data,
+	uint32_t version, uint32_t id)
+{
+	struct wl_resource *resource = wl_resource_create(client,
+		&znet_tapesoftware_dwl_wm_v1_interface, version, id);
+	if (!resource) {
+		wl_client_post_no_memory(client);
+		return;
+	}
+
+	wl_resource_set_implementation(resource, &dwl_wm_implementation, NULL, dwl_wm_handle_destroy);
+
+	for (int i = 0; i < LENGTH(tags); i++)
+		znet_tapesoftware_dwl_wm_v1_send_tag(resource, tags[i]);
+	for (int i = 0; i < LENGTH(layouts); i++)
+		znet_tapesoftware_dwl_wm_v1_send_layout(resource, layouts[i].symbol);
+}
diff --git a/protocols/net-tapesoftware-dwl-wm-unstable-v1.xml b/protocols/net-tapesoftware-dwl-wm-unstable-v1.xml
new file mode 100644
index 0000000..4fe5b73
--- /dev/null
+++ b/protocols/net-tapesoftware-dwl-wm-unstable-v1.xml
@@ -0,0 +1,164 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="net_tapesoftware_dwl_wm_unstable_v1">
+    <copyright>
+        Copyright (c) 2021 Raphael Robatsch
+
+        Permission is hereby granted, free of charge, to any person obtaining a
+        copy of this software and associated documentation files (the
+        "Software"), to deal in the Software without restriction, including
+        without limitation the rights to use, copy, modify, merge, publish,
+        distribute, sublicense, and/or sell copies of the Software, and to
+        permit persons to whom the Software is furnished to do so, subject to
+        the following conditions:
+
+        The above copyright notice and this permission notice (including the
+        next paragraph) shall be included in all copies or substantial portions
+        of the Software.
+
+        THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+        OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+        MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+        IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+        CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+        TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+        SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+    </copyright>
+
+    <interface name="znet_tapesoftware_dwl_wm_v1" version="1">
+        <description summary="control the dwl state">
+            This interface is exposed as a global in the wl_registry.
+
+            Clients can use this protocol to receive updates of the window manager
+            state (active tags, active layout, and focused window).
+            Clients can also control this state.
+
+            After binding, the client will receive the available tags and layouts
+            with the 'tag' and 'layout' events. These can be used in subsequent
+            dwl_wm_monitor_v1.set_tags/set_layout requests, and to interpret the
+            dwl_wm_monitor_v1.layout/tag events.
+        </description>
+
+        <request name="release" type="destructor">
+            <description summary="release dwl_wm">
+                This request indicates that the client will not use the dwl_wm
+                object any more. Objects that have been created through this instance
+                are not affected.
+            </description>
+        </request>
+
+        <request name="get_monitor">
+            <description summary="gets a dwl monitor from an output">
+                Gets a dwl monitor for the specified output. The window manager
+                state on the output can be controlled using the monitor.
+            </description>
+            <arg name="id" type="new_id" interface="znet_tapesoftware_dwl_wm_monitor_v1" />
+            <arg name="output" type="object" interface="wl_output" />
+        </request>
+
+        <event name="tag">
+            <description summary="announces the presence of a tag">
+                This event is sent immediately after binding.
+                A roundtrip after binding guarantees that the client has received all tags.
+            </description>
+            <arg name="name" type="string"/>
+        </event>
+
+        <event name="layout">
+            <description summary="announces the presence of a layout">
+                This event is sent immediately after binding.
+                A roundtrip after binding guarantees that the client has received all layouts.
+            </description>
+            <arg name="name" type="string"/>
+        </event>
+    </interface>
+
+    <interface name="znet_tapesoftware_dwl_wm_monitor_v1" version="1">
+        <description summary="control one monitor">
+            Observes and controls one monitor.
+
+            Events are double-buffered: Clients should cache all events and only
+            redraw themselves once the 'frame' event is sent.
+
+            Requests are not double-buffered: The compositor will update itself
+            immediately.
+        </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_monitor">
+                This request indicates that the client is done with this dwl_monitor.
+                All further requests are ignored.
+            </description>
+        </request>
+
+        <event name="selected">
+            <description summary="updates the selected state of the monitor">
+                If 'selected' is nonzero, this monitor is the currently selected one.
+            </description>
+            <arg name="selected" type="uint"/>
+        </event>
+
+        <event name="tag">
+            <description summary="updates the state of one tag">
+                Announces the update of a tag. num_clients and focused_client can be
+                used to draw client indicators.
+            </description>
+            <arg name="tag" type="uint" summary="index of a tag received by the dwl_wm_v1.tag event." />
+            <arg name="state" type="uint" enum="tag_state"/>
+            <arg name="num_clients" type="uint" summary="number of clients on this tag"/>
+            <arg name="focused_client" type="int" summary="out of num_clients. -1 if there is no focused client"/>
+        </event>
+
+        <event name="layout">
+            <description summary="updates the selected layout">
+                Announces the update of the selected layout.
+            </description>
+            <arg name="layout" type="uint" summary="index of a layout received by the dwl_wm_v1.layout event."/>
+        </event>
+
+        <event name="title">
+            <description summary="updates the focused client">
+                Announces the update of the selected client.
+            </description>
+            <arg name="title" type="string"/>
+        </event>
+
+        <event name="frame">
+            <description summary="end of status update sequence">
+                Sent after all other events belonging to the status update has been sent.
+                Clients should redraw themselves now.
+            </description>
+        </event>
+
+        <request name="set_tags">
+            <description summary="sets the active tags on this monitor.">
+                Changes are applied immediately.
+            </description>
+            <arg name="tagmask" type="uint" summary="bitmask of the tags that should be set."/>
+            <arg name="toggle_tagset" type="uint"/>
+        </request>
+
+        <request name="set_client_tags">
+            <description summary="updates the tags of the focused client.">
+                tags are updated as follows:
+                new_tags = (current_tags AND and_tags) XOR xor_tags
+
+                Changes are applied immediately.
+            </description>
+            <arg name="and_tags" type="uint"/>
+            <arg name="xor_tags" type="uint"/>
+        </request>
+
+        <request name="set_layout">
+            <description summary="sets the active layout on this monitor.">
+                Changes are applied immediately.
+            </description>
+            <arg name="layout" type="uint" summary="index of a layout received by the dwl_wm_v1.layout event."/>
+        </request>
+    </interface>
+</protocol>
-- 
2.39.2