Implement input component

It is required to redirect keyboard input (both physical or not) when
a GUI line edit is focused. This means other components cannot be
activated on key presses.

Therefore, this new component is meant as a higher-level abstraction
compared to the `keyboard`/`pad`/`mouse` components, which:

- Implements the same APIs provided by `keyboard`, `mouse` and `pad`.
- Returns the same results as the APIs above if no GUI element is
focused, no input otherwise.

Note: replacing calls to `keyboard`/`pad`/`mouse` with `input` will be
implemented in a future commit.

1 files changed, 56 insertions, 0 deletions

diff --git a/src/input/inc/input.h b/src/input/inc/input.h
new file mode 100644
index 0000000..2dd401b
--- /dev/null
+++ b/src/input/inc/input.h
@@ -0,0 +1,56 @@
+#ifndef INPUT_H
+#define INPUT_H
+
+#include <keyboard.h>
+#include <mouse.h>
+#include <pad.h>
+#include <peripheral.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+typedef void (*input_ch)(char ch, void *user);
+typedef void (*input_erase)(void *user);
+
+struct input
+{
+    input_ch cb;
+    input_erase erase;
+    void *user;
+    unsigned char t;
+    bool repeat;
+    struct keyboard_combo prev;
+};
+
+void input_update(struct input *in, const union peripheral *p);
+int input_render(const struct input *in, const union peripheral *p);
+bool input_keyboard_justpressed(const struct input *in,
+    const struct keyboard *k,
+    const struct keyboard_combo *c);
+bool input_keyboard_pressed(const struct input *in,
+    const struct keyboard *k,
+    const struct keyboard_combo *c);
+bool input_keyboard_justreleased(const struct input *in,
+    const struct keyboard *k,
+    const struct keyboard_combo *c);
+bool input_pad_pressed(const struct input *in, const struct pad *p,
+    enum pad_key k);
+bool input_pad_justpressed(const struct input *in, const struct pad *p,
+    enum pad_key k);
+bool input_pad_released(const struct input *in, const struct pad *p,
+    enum pad_key k);
+bool input_mouse_pressed(const struct input *in, const struct mouse *m,
+    enum mouse_button b);
+bool input_mouse_justpressed(const struct input *in, const struct mouse *m,
+    enum mouse_button b);
+bool input_mouse_justreleased(const struct input *in, const struct mouse *m,
+    enum mouse_button b);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* INPUT_H */