From: Matthias Kruk <m@m10k.eu>
Date: Tue, 18 May 2021 23:19:30 +0000 (+0900)
Subject: layout: Add infrastructure and client layout functions
X-Git-Url: https://git.corax.cc/?a=commitdiff_plain;h=8af2a122a3ba07b6a2a694c211face8d8d09d4fd;p=mwm

layout: Add infrastructure and client layout functions

Infrastructure to support layout functions, and layout functions
themselves are necessary to correctly display a workspace. This
commit adds the necessary infrastructure to enable swift
implementations of layout functions.
Further, this commit adds a horizontal and a vertical layout
function.
---

diff --git a/layout.c b/layout.c
new file mode 100644
index 0000000..ea85ac0
--- /dev/null
+++ b/layout.c
@@ -0,0 +1,128 @@
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include "monitor.h"
+#include "client.h"
+#include "workspace.h"
+#include "layout.h"
+#include "common.h"
+
+#define PADDING 8
+
+struct layout {
+	char *name;
+	int (*arrange)(struct client*, struct geom*, int, int);
+	layout_orientation_t orientation;
+};
+
+struct layout_args {
+	struct layout *layout;
+	int total_clients;
+	int arranged_clients;
+	struct geom usable_area;
+};
+
+static int bookshelf(struct client *client, struct geom *unallocated,
+		     int arranged_clients, int total_clients);
+static int bookstack(struct client *client, struct geom *unallocated,
+		     int arranged_clients, int total_clients);
+
+static struct layout layout_bookshelf = {
+	.name = "縦",
+	.arrange = bookshelf,
+	.orientation = LAYOUT_HORIZONTAL
+};
+
+static struct layout layout_bookstack = {
+	.name = "横",
+	.arrange = bookstack,
+	.orientation = LAYOUT_VERTICAL
+};
+
+struct layout *layouts[] = {
+	&layout_bookshelf,
+	&layout_bookstack,
+	NULL
+};
+
+static int bookshelf(struct client *client, struct geom *unallocated,
+		     int arranged_clients, int total_clients)
+{
+	struct geom geom;
+	int w;
+
+	w = unallocated->w / (total_clients - arranged_clients);
+
+	geom.x = unallocated->x + PADDING;
+	geom.y = unallocated->y;
+	geom.w = w - PADDING - ((arranged_clients + 1 == total_clients) ? PADDING : 0);
+	geom.h = unallocated->h - PADDING;
+
+	unallocated->x += w;
+	unallocated->w -= w;
+
+	return(client_set_geometry(client, &geom));
+}
+
+static int bookstack(struct client *client, struct geom *unallocated,
+		     int arranged_clients, int total_clients)
+{
+	struct geom geom;
+	int h;
+
+	h = unallocated->h / (total_clients - arranged_clients);
+
+	geom.x = unallocated->x + PADDING;
+	geom.y = unallocated->y + PADDING;
+	geom.w = unallocated->w - PADDING;
+	geom.h = h - PADDING - ((arranged_clients + 1 == total_clients) ? PADDING : 0);
+
+	unallocated->y += h;
+	unallocated->h -= h;
+
+	return(client_set_geometry(client, &geom));
+}
+
+int _arrange_workspace(struct workspace *workspace, struct client *client,
+		       void *data)
+{
+	struct layout_args *args;
+
+	if(!workspace || !client || !data) {
+		return(-EINVAL);
+	}
+
+	args = (struct layout_args*)data;
+
+	args->layout->arrange(client, &args->usable_area,
+			      args->arranged_clients,
+			      args->total_clients);
+	args->arranged_clients++;
+
+	return(0);
+}
+
+int layout_arrange(struct layout *layout,
+		   struct workspace *workspace,
+		   struct geom *usable_area)
+{
+	struct layout_args args;
+
+	if(!layout || !workspace || !usable_area) {
+		return(-EINVAL);
+	}
+
+	args.layout = layout;
+	args.total_clients = workspace_count_tiled_clients(workspace);
+	args.arranged_clients = 0;
+	memcpy(&args.usable_area, usable_area, sizeof(*usable_area));
+
+	workspace_foreach_client(workspace, _arrange_workspace, &args);
+
+	return(0);
+}
+
+layout_orientation_t layout_get_orientation(struct layout *layout)
+{
+	return(layout->orientation);
+}
diff --git a/layout.h b/layout.h
new file mode 100644
index 0000000..d62f57d
--- /dev/null
+++ b/layout.h
@@ -0,0 +1,21 @@
+#ifndef MWM_LAYOUT_H
+#define MWM_LAYOUT_H 1
+
+struct monitor;
+struct workspace;
+struct geom;
+
+typedef enum {
+	LAYOUT_HORIZONTAL = (1 << 0),
+	LAYOUT_VERTICAL   = (1 << 1)
+} layout_orientation_t;
+
+struct layout;
+
+layout_orientation_t layout_get_orientation(struct layout*);
+
+int layout_arrange(struct layout *layout,
+		   struct workspace *workspace,
+		   struct geom *usable_area);
+
+#endif /* MWM_LAYOUT_H */