Add movement support

sway/commands.c

@@ -8,6 +8,7 @@
 #include <ctype.h>
 #include "stringop.h"
 #include "layout.h"
+#include "movement.h"
 #include "log.h"
 #include "commands.h"
 
@@ -97,6 +98,23 @@ int cmd_exit(struct sway_config *config, int argc, char **argv) {
 	return 0;
 }
 
+int cmd_focus(struct sway_config *config, int argc, char **argv) {
+	if (argc != 1) {
+		sway_log(L_ERROR, "Invalid focus command (expected 1 arguments, got %d)", argc);
+		return 1;
+	}
+	if (strcasecmp(argv[0], "left") == 0) {
+		move_focus(MOVE_LEFT);
+	} else if (strcasecmp(argv[0], "right") == 0) {
+		move_focus(MOVE_RIGHT);
+	} else if (strcasecmp(argv[0], "up") == 0) {
+		move_focus(MOVE_UP);
+	} else if (strcasecmp(argv[0], "down") == 0) {
+		move_focus(MOVE_DOWN);
+	}
+	return 0;
+}
+
 int cmd_focus_follows_mouse(struct sway_config *config, int argc, char **argv) {
 	if (argc != 1) {
 		sway_log(L_ERROR, "Invalid focus_follows_mouse command (expected 1 arguments, got %d)", argc);
@@ -184,6 +202,7 @@ struct cmd_handler handlers[] = {
 	{ "bindsym", cmd_bindsym },
 	{ "exec", cmd_exec },
 	{ "exit", cmd_exit },
+	{ "focus", cmd_focus },
 	{ "focus_follows_mouse", cmd_focus_follows_mouse },
 	{ "layout", cmd_layout },
 	{ "set", cmd_set },

sway/layout.c

@@ -163,6 +163,7 @@ void add_view(wlc_handle view_handle) {
 	view->type = C_VIEW;
 	add_child(parent, view);
 
+	unfocus_all(&root_container);
 	focus_view(view);
 
 	arrange_windows(parent, -1, -1);
@@ -209,6 +210,7 @@ void destroy_view(swayc_t *view) {
 		parent->focused = NULL;
 	}
 
+	unfocus_all(&root_container);
 	if (parent->children->length != 0) {
 		focus_view(parent->children->items[0]);
 	} else {
@@ -238,12 +240,17 @@ void unfocus_all(swayc_t *container) {
 }
 
 void focus_view(swayc_t *view) {
-	if (view->type == C_VIEW) {
+	sway_log(L_DEBUG, "Setting focus for %p", view);
-		unfocus_all(&root_container);
-		wlc_view_set_state(view->handle, WLC_BIT_ACTIVATED, true);
-		wlc_view_focus(view->handle);
-	}
 	if (view == &root_container) {
+		// Propegate wayland focus down
+		swayc_t *child = view->focused;
+		while (child && child->type != C_VIEW) {
+			child = child->focused;
+		}
+		if (child) {
+			wlc_view_set_state(child->handle, WLC_BIT_ACTIVATED, true);
+			wlc_view_focus(child->handle);
+		}
 		return;
 	}
 	view->parent->focused = view;
@@ -285,6 +292,7 @@ void add_output(wlc_handle output) {
 	add_child(container, workspace);
 
 	if (root_container.focused == NULL) {
+		unfocus_all(&root_container);
 		focus_view(workspace);
 	}
 }

sway/layout.h

@@ -49,6 +49,7 @@ void add_output(wlc_handle output);
 void destroy_output(wlc_handle output);
 void destroy_view(swayc_t *view);
 void add_view(wlc_handle view);
+void unfocus_all(swayc_t *container);
 void focus_view(swayc_t *view);
 void arrange_windows(swayc_t *container, int width, int height);
 swayc_t *find_container(swayc_t *container, bool (*test)(swayc_t *view, void *data), void *data);

sway/list.c

@@ -28,6 +28,7 @@ void list_add(list_t *list, void *item) {
 }
 
 void list_insert(list_t *list, int index, void *item) {
+	// TODO: Implement this properly
 	if (list->length == list->capacity) {
 		list->capacity += 10;
 		list->items = realloc(list->items, sizeof(void*) * list->capacity);

sway/movement.c

@@ -0,0 +1,58 @@
+#include <stdlib.h>
+#include <stdbool.h>
+#include "list.h"
+#include "log.h"
+#include "layout.h"
+#include "movement.h"
+
+void move_focus(enum movement_direction direction) {
+	swayc_t *current = get_focused_container(&root_container);
+	swayc_t *parent = current->parent;
+
+	while (true) {
+		sway_log(L_DEBUG, "Moving focus away from %p", current);
+
+		// Test if we can even make a difference here
+		bool can_move = false;
+		int diff = 0;
+		if (direction == MOVE_LEFT || direction == MOVE_RIGHT) {
+			if (parent->layout == L_HORIZ) {
+				can_move = true;
+				diff = direction == MOVE_LEFT ? -1 : 1;
+			}
+		} else {
+			if (parent->layout == L_VERT) {
+				can_move = true;
+				diff = direction == MOVE_UP ? -1 : 1;
+			}
+		}
+		sway_log(L_DEBUG, "Can move? %s", can_move ? "yes" : "no");
+		if (can_move) {
+			int i;
+			for (i = 0; i < parent->children->length; ++i) {
+				swayc_t *child = parent->children->items[i];
+				if (child == current) {
+					break;
+				}
+			}
+			int desired = i + diff;
+			sway_log(L_DEBUG, "Moving from %d to %d", i, desired);
+			if (desired < 0 || desired >= parent->children->length) {
+				can_move = false;
+			} else {
+				unfocus_all(&root_container);
+				focus_view(parent->children->items[desired]);
+				return;
+			}
+		}
+		if (!can_move) {
+			sway_log(L_DEBUG, "Can't move at current level, moving up tree");
+			current = parent;
+			parent = parent->parent;
+			if (parent->type == C_ROOT) {
+				// Nothing we can do
+				return;
+			}
+		}
+	}
+}

sway/movement.h

@@ -0,0 +1,16 @@
+#ifndef _SWAY_MOVEMENT_H
+#define _SWAY_MOVEMENT_H
+
+#include <wlc/wlc.h>
+#include "list.h"
+
+enum movement_direction{
+    MOVE_LEFT,
+    MOVE_RIGHT,
+    MOVE_UP,
+    MOVE_DOWN
+};
+
+void move_focus(enum movement_direction direction);
+
+#endif