Merge pull request #1539 from acrisci/bindings

Bindings

1 files changed, 245 insertions, 0 deletions

diff --git a/sway/commands/bind.c b/sway/commands/bind.c
new file mode 100644
index 00000000..79121404
--- /dev/null
+++ b/sway/commands/bind.c
@@ -0,0 +1,245 @@
+#ifdef __linux__
+#include <linux/input-event-codes.h>
+#elif __FreeBSD__
+#include <dev/evdev/input-event-codes.h>
+#endif
+#include <xkbcommon/xkbcommon.h>
+#include <xkbcommon/xkbcommon-names.h>
+#include <strings.h>
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "list.h"
+#include "log.h"
+#include "stringop.h"
+#include "util.h"
+
+int binding_order = 0;
+
+void free_sway_binding(struct sway_binding *binding) {
+	if (!binding) {
+		return;
+	}
+
+	if (binding->keys) {
+		free_flat_list(binding->keys);
+	}
+	free(binding->command);
+	free(binding);
+}
+
+/**
+ * Returns true if the bindings have the same key and modifier combinations.
+ * Note that keyboard layout is not considered, so the bindings might actually
+ * not be equivalent on some layouts.
+ */
+bool binding_key_compare(struct sway_binding *binding_a,
+		struct sway_binding *binding_b) {
+	if (binding_a->release != binding_b->release) {
+		return false;
+	}
+
+	if (binding_a->bindcode != binding_b->bindcode) {
+		return false;
+	}
+
+	if (binding_a->modifiers ^ binding_b->modifiers) {
+		return false;
+	}
+
+	if (binding_a->keys->length != binding_b->keys->length) {
+		return false;
+	}
+
+	int keys_len = binding_a->keys->length;
+	for (int i = 0; i < keys_len; ++i) {
+		uint32_t key_a = *(uint32_t*)binding_a->keys->items[i];
+		bool found = false;
+		for (int j = 0; j < keys_len; ++j) {
+			uint32_t key_b = *(uint32_t*)binding_b->keys->items[j];
+			if (key_b == key_a) {
+				found = true;
+				break;
+			}
+		}
+		if (!found) {
+			return false;
+		}
+	}
+
+	return true;
+}
+
+struct cmd_results *cmd_bindsym(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "bindsym", EXPECTED_MORE_THAN, 1))) {
+		return error;
+	}
+
+	struct sway_binding *binding = calloc(1, sizeof(struct sway_binding));
+	if (!binding) {
+		return cmd_results_new(CMD_FAILURE, "bindsym",
+				"Unable to allocate binding");
+	}
+	binding->keys = create_list();
+	binding->modifiers = 0;
+	binding->release = false;
+	binding->bindcode = false;
+
+	// Handle --release
+	if (strcmp("--release", argv[0]) == 0) {
+		if (argc >= 3) {
+			binding->release = true;
+			argv++;
+			argc--;
+		} else {
+			free_sway_binding(binding);
+			return cmd_results_new(CMD_FAILURE, "bindsym",
+				"Invalid bindsym command "
+				"(expected more than 2 arguments, got %d)", argc);
+		}
+	}
+
+	binding->command = join_args(argv + 1, argc - 1);
+
+	list_t *split = split_string(argv[0], "+");
+	for (int i = 0; i < split->length; ++i) {
+		// Check for a modifier key
+		uint32_t mod;
+		if ((mod = get_modifier_mask_by_name(split->items[i])) > 0) {
+			binding->modifiers |= mod;
+			continue;
+		}
+		// Check for xkb key
+		xkb_keysym_t sym = xkb_keysym_from_name(split->items[i],
+				XKB_KEYSYM_CASE_INSENSITIVE);
+
+		// Check for mouse binding
+		if (strncasecmp(split->items[i], "button", strlen("button")) == 0 &&
+				strlen(split->items[i]) == strlen("button0")) {
+			sym = ((char *)split->items[i])[strlen("button")] - '1' + BTN_LEFT;
+		}
+		if (!sym) {
+			struct cmd_results *ret = cmd_results_new(CMD_INVALID, "bindsym",
+					"Unknown key '%s'", (char *)split->items[i]);
+			free_sway_binding(binding);
+			free_flat_list(split);
+			return ret;
+		}
+		xkb_keysym_t *key = calloc(1, sizeof(xkb_keysym_t));
+		if (!key) {
+			free_sway_binding(binding);
+			free_flat_list(split);
+			return cmd_results_new(CMD_FAILURE, "bindsym",
+					"Unable to allocate binding");
+		}
+		*key = sym;
+		list_add(binding->keys, key);
+	}
+	free_flat_list(split);
+	binding->order = binding_order++;
+
+	list_t *mode_bindings = config->current_mode->keysym_bindings;
+
+	// overwrite the binding if it already exists
+	bool overwritten = false;
+	for (int i = 0; i < mode_bindings->length; ++i) {
+		struct sway_binding *config_binding = mode_bindings->items[i];
+		if (binding_key_compare(binding, config_binding)) {
+			sway_log(L_DEBUG, "overwriting old binding with command '%s'",
+				config_binding->command);
+			free_sway_binding(config_binding);
+			mode_bindings->items[i] = binding;
+			overwritten = true;
+		}
+	}
+
+	if (!overwritten) {
+		list_add(mode_bindings, binding);
+	}
+
+	sway_log(L_DEBUG, "bindsym - Bound %s to command %s",
+		argv[0], binding->command);
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}
+
+struct cmd_results *cmd_bindcode(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "bindcode", EXPECTED_MORE_THAN, 1))) {
+		return error;
+	}
+
+	struct sway_binding *binding = calloc(1, sizeof(struct sway_binding));
+	if (!binding) {
+		return cmd_results_new(CMD_FAILURE, "bindsym",
+				"Unable to allocate binding");
+	}
+	binding->keys = create_list();
+	binding->modifiers = 0;
+	binding->release = false;
+	binding->bindcode = true;
+
+	// Handle --release
+	if (strcmp("--release", argv[0]) == 0) {
+		if (argc >= 3) {
+			binding->release = true;
+			argv++;
+			argc--;
+		} else {
+			free_sway_binding(binding);
+			return cmd_results_new(CMD_FAILURE, "bindcode",
+				"Invalid bindcode command "
+				"(expected more than 2 arguments, got %d)", argc);
+		}
+	}
+
+	binding->command = join_args(argv + 1, argc - 1);
+
+	list_t *split = split_string(argv[0], "+");
+	for (int i = 0; i < split->length; ++i) {
+		// Check for a modifier key
+		uint32_t mod;
+		if ((mod = get_modifier_mask_by_name(split->items[i])) > 0) {
+			binding->modifiers |= mod;
+			continue;
+		}
+		// parse keycode
+		xkb_keycode_t keycode = (int)strtol(split->items[i], NULL, 10);
+		if (!xkb_keycode_is_legal_ext(keycode)) {
+			error =
+				cmd_results_new(CMD_INVALID, "bindcode",
+					"Invalid keycode '%s'", (char *)split->items[i]);
+			free_sway_binding(binding);
+			list_free(split);
+			return error;
+		}
+		xkb_keycode_t *key = calloc(1, sizeof(xkb_keycode_t));
+		*key = keycode - 8;
+		list_add(binding->keys, key);
+	}
+	free_flat_list(split);
+
+	binding->order = binding_order++;
+
+	list_t *mode_bindings = config->current_mode->keycode_bindings;
+
+	// overwrite the binding if it already exists
+	bool overwritten = false;
+	for (int i = 0; i < mode_bindings->length; ++i) {
+		struct sway_binding *config_binding = mode_bindings->items[i];
+		if (binding_key_compare(binding, config_binding)) {
+			sway_log(L_DEBUG, "overwriting old binding with command '%s'",
+				config_binding->command);
+			free_sway_binding(config_binding);
+			mode_bindings->items[i] = binding;
+			overwritten = true;
+		}
+	}
+
+	if (!overwritten) {
+		list_add(mode_bindings, binding);
+	}
+
+	sway_log(L_DEBUG, "bindcode - Bound %s to command %s",
+		argv[0], binding->command);
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}