root: move the workspace matching code to its own file

This removes the pid_workspace bits from tree/root before it gets
too interesting.

No functional change.

8 files changed, 207 insertions, 188 deletions

diff --git a/include/sway/desktop/launcher.h b/include/sway/desktop/launcher.h
new file mode 100644
index 00000000..cb22eb98
--- /dev/null
+++ b/include/sway/desktop/launcher.h
@@ -0,0 +1,14 @@
+#ifndef _SWAY_LAUNCHER_H
+#define _SWAY_LAUNCHER_H
+
+#include <stdlib.h>
+
+struct sway_workspace *root_workspace_for_pid(pid_t pid);
+
+void root_record_workspace_pid(pid_t pid);
+
+void root_remove_workspace_pid(pid_t pid);
+
+void root_rename_pid_workspaces(const char *old_name, const char *new_name);
+
+#endif
diff --git a/include/sway/tree/root.h b/include/sway/tree/root.h
index af4124a1..a2c088e7 100644
--- a/include/sway/tree/root.h
+++ b/include/sway/tree/root.h
@@ -69,12 +69,6 @@ void root_scratchpad_show(struct sway_container *con);
  */
 void root_scratchpad_hide(struct sway_container *con);
 
-struct sway_workspace *root_workspace_for_pid(pid_t pid);
-
-void root_record_workspace_pid(pid_t pid);
-
-void root_remove_workspace_pid(pid_t pid);
-
 void root_for_each_workspace(void (*f)(struct sway_workspace *ws, void *data),
 		void *data);
 
@@ -92,6 +86,4 @@ struct sway_container *root_find_container(
 
 void root_get_box(struct sway_root *root, struct wlr_box *box);
 
-void root_rename_pid_workspaces(const char *old_name, const char *new_name);
-
 #endif
diff --git a/sway/commands/exec_always.c b/sway/commands/exec_always.c
index b35065c1..fab9a402 100644
--- a/sway/commands/exec_always.c
+++ b/sway/commands/exec_always.c
@@ -8,6 +8,7 @@
 #include "sway/commands.h"
 #include "sway/config.h"
 #include "sway/server.h"
+#include "sway/desktop/launcher.h"
 #include "sway/tree/container.h"
 #include "sway/tree/root.h"
 #include "sway/tree/workspace.h"
diff --git a/sway/commands/rename.c b/sway/commands/rename.c
index 3b855fdf..4656a410 100644
--- a/sway/commands/rename.c
+++ b/sway/commands/rename.c
@@ -7,6 +7,7 @@
 #include "sway/config.h"
 #include "sway/ipc-server.h"
 #include "sway/output.h"
+#include "sway/desktop/launcher.h"
 #include "sway/tree/container.h"
 #include "sway/tree/workspace.h"
 #include "sway/tree/root.h"
diff --git a/sway/desktop/launcher.c b/sway/desktop/launcher.c
new file mode 100644
index 00000000..4e0d9dc1
--- /dev/null
+++ b/sway/desktop/launcher.c
@@ -0,0 +1,189 @@
+#define _POSIX_C_SOURCE 200809L
+#include <stdlib.h>
+#include <string.h>
+#include "sway/input/seat.h"
+#include "sway/output.h"
+#include "sway/desktop/launcher.h"
+#include "sway/tree/container.h"
+#include "sway/tree/workspace.h"
+#include "log.h"
+
+static struct wl_list pid_workspaces;
+
+struct pid_workspace {
+	pid_t pid;
+	char *workspace;
+	struct timespec time_added;
+
+	struct sway_output *output;
+	struct wl_listener output_destroy;
+
+	struct wl_list link;
+};
+
+/**
+ * Get the pid of a parent process given the pid of a child process.
+ *
+ * Returns the parent pid or NULL if the parent pid cannot be determined.
+ */
+static pid_t get_parent_pid(pid_t child) {
+	pid_t parent = -1;
+	char file_name[100];
+	char *buffer = NULL;
+	const char *sep = " ";
+	FILE *stat = NULL;
+	size_t buf_size = 0;
+
+	snprintf(file_name, sizeof(file_name), "/proc/%d/stat", child);
+
+	if ((stat = fopen(file_name, "r"))) {
+		if (getline(&buffer, &buf_size, stat) != -1) {
+			strtok(buffer, sep); // pid
+			strtok(NULL, sep);   // executable name
+			strtok(NULL, sep);   // state
+			char *token = strtok(NULL, sep);   // parent pid
+			parent = strtol(token, NULL, 10);
+		}
+		free(buffer);
+		fclose(stat);
+	}
+
+	if (parent) {
+		return (parent == child) ? -1 : parent;
+	}
+
+	return -1;
+}
+
+static void pid_workspace_destroy(struct pid_workspace *pw) {
+	wl_list_remove(&pw->output_destroy.link);
+	wl_list_remove(&pw->link);
+	free(pw->workspace);
+	free(pw);
+}
+
+struct sway_workspace *root_workspace_for_pid(pid_t pid) {
+	if (!pid_workspaces.prev && !pid_workspaces.next) {
+		wl_list_init(&pid_workspaces);
+		return NULL;
+	}
+
+	struct sway_workspace *ws = NULL;
+	struct pid_workspace *pw = NULL;
+
+	sway_log(SWAY_DEBUG, "Looking up workspace for pid %d", pid);
+
+	do {
+		struct pid_workspace *_pw = NULL;
+		wl_list_for_each(_pw, &pid_workspaces, link) {
+			if (pid == _pw->pid) {
+				pw = _pw;
+				sway_log(SWAY_DEBUG,
+						"found pid_workspace for pid %d, workspace %s",
+						pid, pw->workspace);
+				goto found;
+			}
+		}
+		pid = get_parent_pid(pid);
+	} while (pid > 1);
+
+found:
+	if (pw && pw->workspace) {
+		ws = workspace_by_name(pw->workspace);
+
+		if (!ws) {
+			sway_log(SWAY_DEBUG,
+					"Creating workspace %s for pid %d because it disappeared",
+					pw->workspace, pid);
+
+			struct sway_output *output = pw->output;
+			if (pw->output && !pw->output->enabled) {
+				sway_log(SWAY_DEBUG,
+						"Workspace output %s is disabled, trying another one",
+						pw->output->wlr_output->name);
+				output = NULL;
+			}
+
+			ws = workspace_create(output, pw->workspace);
+		}
+
+		pid_workspace_destroy(pw);
+	}
+
+	return ws;
+}
+
+static void pw_handle_output_destroy(struct wl_listener *listener, void *data) {
+	struct pid_workspace *pw = wl_container_of(listener, pw, output_destroy);
+	pw->output = NULL;
+	wl_list_remove(&pw->output_destroy.link);
+	wl_list_init(&pw->output_destroy.link);
+}
+
+void root_record_workspace_pid(pid_t pid) {
+	sway_log(SWAY_DEBUG, "Recording workspace for process %d", pid);
+	if (!pid_workspaces.prev && !pid_workspaces.next) {
+		wl_list_init(&pid_workspaces);
+	}
+
+	struct sway_seat *seat = input_manager_current_seat();
+	struct sway_workspace *ws = seat_get_focused_workspace(seat);
+	if (!ws) {
+		sway_log(SWAY_DEBUG, "Bailing out, no workspace");
+		return;
+	}
+	struct sway_output *output = ws->output;
+	if (!output) {
+		sway_log(SWAY_DEBUG, "Bailing out, no output");
+		return;
+	}
+
+	struct timespec now;
+	clock_gettime(CLOCK_MONOTONIC, &now);
+
+	// Remove expired entries
+	static const int timeout = 60;
+	struct pid_workspace *old, *_old;
+	wl_list_for_each_safe(old, _old, &pid_workspaces, link) {
+		if (now.tv_sec - old->time_added.tv_sec >= timeout) {
+			pid_workspace_destroy(old);
+		}
+	}
+
+	struct pid_workspace *pw = calloc(1, sizeof(struct pid_workspace));
+	pw->workspace = strdup(ws->name);
+	pw->output = output;
+	pw->pid = pid;
+	memcpy(&pw->time_added, &now, sizeof(struct timespec));
+	pw->output_destroy.notify = pw_handle_output_destroy;
+	wl_signal_add(&output->wlr_output->events.destroy, &pw->output_destroy);
+	wl_list_insert(&pid_workspaces, &pw->link);
+}
+
+void root_remove_workspace_pid(pid_t pid) {
+	if (!pid_workspaces.prev || !pid_workspaces.next) {
+		return;
+	}
+
+	struct pid_workspace *pw, *tmp;
+	wl_list_for_each_safe(pw, tmp, &pid_workspaces, link) {
+		if (pid == pw->pid) {
+			pid_workspace_destroy(pw);
+			return;
+		}
+	}
+}
+
+void root_rename_pid_workspaces(const char *old_name, const char *new_name) {
+	if (!pid_workspaces.prev && !pid_workspaces.next) {
+		wl_list_init(&pid_workspaces);
+	}
+
+	struct pid_workspace *pw = NULL;
+	wl_list_for_each(pw, &pid_workspaces, link) {
+		if (strcmp(pw->workspace, old_name) == 0) {
+			free(pw->workspace);
+			pw->workspace = strdup(new_name);
+		}
+	}
+}
diff --git a/sway/meson.build b/sway/meson.build
index bb6bf88c..8a73cc86 100644
--- a/sway/meson.build
+++ b/sway/meson.build
@@ -21,6 +21,7 @@ sway_sources = files(
 	'desktop/surface.c',
 	'desktop/transaction.c',
 	'desktop/xdg_shell.c',
+	'desktop/launcher.c',
 
 	'input/input-manager.c',
 	'input/cursor.c',
diff --git a/sway/tree/root.c b/sway/tree/root.c
index 7df0b237..8934721f 100644
--- a/sway/tree/root.c
+++ b/sway/tree/root.c
@@ -184,172 +184,6 @@ void root_scratchpad_hide(struct sway_container *con) {
 	ipc_event_window(con, "move");
 }
 
-struct pid_workspace {
-	pid_t pid;
-	char *workspace;
-	struct timespec time_added;
-
-	struct sway_output *output;
-	struct wl_listener output_destroy;
-
-	struct wl_list link;
-};
-
-static struct wl_list pid_workspaces;
-
-/**
- * Get the pid of a parent process given the pid of a child process.
- *
- * Returns the parent pid or NULL if the parent pid cannot be determined.
- */
-static pid_t get_parent_pid(pid_t child) {
-	pid_t parent = -1;
-	char file_name[100];
-	char *buffer = NULL;
-	const char *sep = " ";
-	FILE *stat = NULL;
-	size_t buf_size = 0;
-
-	snprintf(file_name, sizeof(file_name), "/proc/%d/stat", child);
-
-	if ((stat = fopen(file_name, "r"))) {
-		if (getline(&buffer, &buf_size, stat) != -1) {
-			strtok(buffer, sep); // pid
-			strtok(NULL, sep);   // executable name
-			strtok(NULL, sep);   // state
-			char *token = strtok(NULL, sep);   // parent pid
-			parent = strtol(token, NULL, 10);
-		}
-		free(buffer);
-		fclose(stat);
-	}
-
-	if (parent) {
-		return (parent == child) ? -1 : parent;
-	}
-
-	return -1;
-}
-
-static void pid_workspace_destroy(struct pid_workspace *pw) {
-	wl_list_remove(&pw->output_destroy.link);
-	wl_list_remove(&pw->link);
-	free(pw->workspace);
-	free(pw);
-}
-
-struct sway_workspace *root_workspace_for_pid(pid_t pid) {
-	if (!pid_workspaces.prev && !pid_workspaces.next) {
-		wl_list_init(&pid_workspaces);
-		return NULL;
-	}
-
-	struct sway_workspace *ws = NULL;
-	struct pid_workspace *pw = NULL;
-
-	sway_log(SWAY_DEBUG, "Looking up workspace for pid %d", pid);
-
-	do {
-		struct pid_workspace *_pw = NULL;
-		wl_list_for_each(_pw, &pid_workspaces, link) {
-			if (pid == _pw->pid) {
-				pw = _pw;
-				sway_log(SWAY_DEBUG,
-						"found pid_workspace for pid %d, workspace %s",
-						pid, pw->workspace);
-				goto found;
-			}
-		}
-		pid = get_parent_pid(pid);
-	} while (pid > 1);
-found:
-
-	if (pw && pw->workspace) {
-		ws = workspace_by_name(pw->workspace);
-
-		if (!ws) {
-			sway_log(SWAY_DEBUG,
-					"Creating workspace %s for pid %d because it disappeared",
-					pw->workspace, pid);
-
-			struct sway_output *output = pw->output;
-			if (pw->output && !pw->output->enabled) {
-				sway_log(SWAY_DEBUG,
-						"Workspace output %s is disabled, trying another one",
-						pw->output->wlr_output->name);
-				output = NULL;
-			}
-
-			ws = workspace_create(output, pw->workspace);
-		}
-
-		pid_workspace_destroy(pw);
-	}
-
-	return ws;
-}
-
-static void pw_handle_output_destroy(struct wl_listener *listener, void *data) {
-	struct pid_workspace *pw = wl_container_of(listener, pw, output_destroy);
-	pw->output = NULL;
-	wl_list_remove(&pw->output_destroy.link);
-	wl_list_init(&pw->output_destroy.link);
-}
-
-void root_record_workspace_pid(pid_t pid) {
-	sway_log(SWAY_DEBUG, "Recording workspace for process %d", pid);
-	if (!pid_workspaces.prev && !pid_workspaces.next) {
-		wl_list_init(&pid_workspaces);
-	}
-
-	struct sway_seat *seat = input_manager_current_seat();
-	struct sway_workspace *ws = seat_get_focused_workspace(seat);
-	if (!ws) {
-		sway_log(SWAY_DEBUG, "Bailing out, no workspace");
-		return;
-	}
-	struct sway_output *output = ws->output;
-	if (!output) {
-		sway_log(SWAY_DEBUG, "Bailing out, no output");
-		return;
-	}
-
-	struct timespec now;
-	clock_gettime(CLOCK_MONOTONIC, &now);
-
-	// Remove expired entries
-	static const int timeout = 60;
-	struct pid_workspace *old, *_old;
-	wl_list_for_each_safe(old, _old, &pid_workspaces, link) {
-		if (now.tv_sec - old->time_added.tv_sec >= timeout) {
-			pid_workspace_destroy(old);
-		}
-	}
-
-	struct pid_workspace *pw = calloc(1, sizeof(struct pid_workspace));
-	pw->workspace = strdup(ws->name);
-	pw->output = output;
-	pw->pid = pid;
-	memcpy(&pw->time_added, &now, sizeof(struct timespec));
-	pw->output_destroy.notify = pw_handle_output_destroy;
-	wl_signal_add(&output->wlr_output->events.destroy, &pw->output_destroy);
-	wl_list_insert(&pid_workspaces, &pw->link);
-}
-
-void root_remove_workspace_pid(pid_t pid) {
-	if (!pid_workspaces.prev || !pid_workspaces.next) {
-		return;
-	}
-
-	struct pid_workspace *pw, *tmp;
-	wl_list_for_each_safe(pw, tmp, &pid_workspaces, link) {
-		if (pid == pw->pid) {
-			pid_workspace_destroy(pw);
-			return;
-		}
-	}
-}
-
 void root_for_each_workspace(void (*f)(struct sway_workspace *ws, void *data),
 		void *data) {
 	for (int i = 0; i < root->outputs->length; ++i) {
@@ -444,17 +278,3 @@ void root_get_box(struct sway_root *root, struct wlr_box *box) {
 	box->width = root->width;
 	box->height = root->height;
 }
-
-void root_rename_pid_workspaces(const char *old_name, const char *new_name) {
-	if (!pid_workspaces.prev && !pid_workspaces.next) {
-		wl_list_init(&pid_workspaces);
-	}
-
-	struct pid_workspace *pw = NULL;
-	wl_list_for_each(pw, &pid_workspaces, link) {
-		if (strcmp(pw->workspace, old_name) == 0) {
-			free(pw->workspace);
-			pw->workspace = strdup(new_name);
-		}
-	}
-}
diff --git a/sway/tree/view.c b/sway/tree/view.c
index 589a3f7e..edc3e2af 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -19,6 +19,7 @@
 #include "sway/desktop.h"
 #include "sway/desktop/transaction.h"
 #include "sway/desktop/idle_inhibit_v1.h"
+#include "sway/desktop/launcher.h"
 #include "sway/input/cursor.h"
 #include "sway/ipc-server.h"
 #include "sway/output.h"