From a123725a12e948d78badb2cb686d38548f1c633b Mon Sep 17 00:00:00 2001
From: Albert Cervin <albert@acervin.com>
Date: Thu, 6 Apr 2023 23:23:46 +0200
Subject: Implement window handling

Also implement searching.

fix undo boundaries

when it checked for other save point, it used && instead of == which
caused it to overwrite other types.

Fix bytes vs chars bug in text_get_region
---
 src/dged/binding.h | 136 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 src/dged/binding.h

(limited to 'src/dged/binding.h')

diff --git a/src/dged/binding.h b/src/dged/binding.h
new file mode 100644
index 0000000..f2a531d
--- /dev/null
+++ b/src/dged/binding.h
@@ -0,0 +1,136 @@
+#include "hash.h"
+#include "keyboard.h"
+
+/**
+ * Directory of keyboard mappings.
+ */
+struct keymap {
+  /** Keymap name */
+  const char *name;
+
+  /** The bindings in this keymap */
+  struct binding *bindings;
+
+  /** The number of bindings in this keymap */
+  uint32_t nbindings;
+
+  /** The number of bindings this keymap can currently hold */
+  uint32_t capacity;
+};
+
+/**
+ * Type of a keyboard binding
+ */
+enum binding_type {
+  /** This binding is to a command */
+  BindingType_Command,
+
+  /** This binding is to another keymap */
+  BindingType_Keymap,
+
+  /** This binding is to an already resolved command,
+   * a.k.a. anonymous binding.
+   */
+  BindingType_DirectCommand
+};
+
+#define BINDING_INNER(mod_, c_, command_)                                      \
+  (struct binding) {                                                           \
+    .key = {.mod = mod_, .key = c_}, .type = BindingType_Command,              \
+    .command = hash_name(command_)                                             \
+  }
+
+#define ANONYMOUS_BINDING_INNER(mod_, c_, command_)                            \
+  (struct binding) {                                                           \
+    .key = {.mod = mod_, .key = c_}, .type = BindingType_DirectCommand,        \
+    .direct_command = command_                                                 \
+  }
+
+#define PREFIX_INNER(mod_, c_, keymap_)                                        \
+  (struct binding) {                                                           \
+    .key = {.mod = mod_, .key = c_}, .type = BindingType_Keymap,               \
+    .keymap = keymap_                                                          \
+  }
+
+#define BINDING(...) BINDING_INNER(__VA_ARGS__)
+#define PREFIX(...) PREFIX_INNER(__VA_ARGS__)
+#define ANONYMOUS_BINDING(...) ANONYMOUS_BINDING_INNER(__VA_ARGS__)
+
+/**
+ * A keyboard key bound to an action
+ */
+struct binding {
+  /** The keyboard key that triggers the action in this binding */
+  struct key key;
+
+  /** Type of this binding, see @ref binding_type */
+  uint8_t type;
+
+  union {
+    /** A hash of a command name */
+    uint32_t command;
+    /** A command */
+    struct command *direct_command;
+    /** A keymap */
+    struct keymap *keymap;
+  };
+};
+
+/**
+ * Result of a binding lookup
+ */
+struct lookup_result {
+  /** True if a binding was found */
+  bool found;
+
+  /** Type of binding in the result */
+  uint8_t type;
+
+  union {
+    /** A command */
+    struct command *command;
+    /** A keymap */
+    struct keymap *keymap;
+  };
+};
+
+struct commands;
+
+/**
+ * Create a new keymap
+ *
+ * @param name Name of the keymap
+ * @param capacity Initial capacity of the keymap.
+ * @returns The created keymap
+ */
+struct keymap keymap_create(const char *name, uint32_t capacity);
+
+/**
+ * Bind keys in a keymap.
+ *
+ * @param keymap The keymap to bind keys in.
+ * @param bindings Bindings to add.
+ * @param nbindings Number of bindings in @ref bindings.
+ */
+void keymap_bind_keys(struct keymap *keymap, struct binding *bindings,
+                      uint32_t nbindings);
+
+/**
+ * Destroy a keymap.
+ *
+ * This clears all keybindings associated with the keymap.
+ * @param keymap Keymap to destroy.
+ */
+void keymap_destroy(struct keymap *keymap);
+
+/**
+ * Lookup the binding for a key in a set of keymaps.
+ *
+ * @param keymaps The keymaps to look in.
+ * @param nkeymaps The number of keymaps in @ref keymaps.
+ * @param key The keystroke to look up bindings for.
+ * @param commands Available commands for lookup.
+ * @returns A @ref lookup_result with the result of the lookup.
+ */
+struct lookup_result lookup_key(struct keymap *keymaps, uint32_t nkeymaps,
+                                struct key *key, struct commands *commands);
-- 
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