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terminal-unix: support mouse escape codes 

These 6-byte codes have the format of \e [ M <button> <xpos> <ypos>.
Support the first 3 mouse bottons + scroll up/down for now as
button numbers > 5 are pretty non-portable across terminals.
Pixel-based mouse position values are calculated and sent to the
input system.
This commit is contained in:
nanahi 2024-03-01 23:42:22 -05:00 committed by Kacper Michajłow
parent 805577c792
commit 9ae58ba186
2 changed files with 43 additions and 2 deletions
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42
osdep/terminal-unix.c
View File

@ -54,6 +54,12 @@ static struct termios tio_orig;
static int tty_in = -1, tty_out = -1;
enum entry_type {
ENTRY_TYPE_KEY = 0,
ENTRY_TYPE_MOUSE_BUTTON,
ENTRY_TYPE_MOUSE_MOVE,
};
struct key_entry {
const char *seq;
int mpkey;
@ -61,6 +67,10 @@ struct key_entry {
// existing sequence is replaced by the following string. Matching
// continues normally, and mpkey is or-ed into the final result.
const char *replace;
// Extend the match length by a certain length, so the contents
// after the match can be processed with custom logic.
int skip;
enum entry_type type;
};
static const struct key_entry keys[] = {
@ -160,6 +170,18 @@ static const struct key_entry keys[] = {
{"\033[29~", MP_KEY_MENU},
{"\033[Z", MP_KEY_TAB | MP_KEY_MODIFIER_SHIFT},
// Mouse button inputs. 2 bytes of position information requires special processing.
{"\033[M ", MP_MBTN_LEFT | MP_KEY_STATE_DOWN, .skip = 2, .type = ENTRY_TYPE_MOUSE_BUTTON},
{"\033[M!", MP_MBTN_MID | MP_KEY_STATE_DOWN, .skip = 2, .type = ENTRY_TYPE_MOUSE_BUTTON},
{"\033[M\"", MP_MBTN_RIGHT | MP_KEY_STATE_DOWN, .skip = 2, .type = ENTRY_TYPE_MOUSE_BUTTON},
{"\033[M#", MP_INPUT_RELEASE_ALL, .skip = 2, .type = ENTRY_TYPE_MOUSE_BUTTON},
{"\033[M`", MP_WHEEL_UP, .skip = 2, .type = ENTRY_TYPE_MOUSE_BUTTON},
{"\033[Ma", MP_WHEEL_DOWN, .skip = 2, .type = ENTRY_TYPE_MOUSE_BUTTON},
// Mouse move inputs. No key events should be generated for them.
{"\033[M@", MP_MBTN_LEFT | MP_KEY_STATE_DOWN, .skip = 2, .type = ENTRY_TYPE_MOUSE_MOVE},
{"\033[MA", MP_MBTN_MID | MP_KEY_STATE_DOWN, .skip = 2, .type = ENTRY_TYPE_MOUSE_MOVE},
{"\033[MB", MP_MBTN_RIGHT | MP_KEY_STATE_DOWN, .skip = 2, .type = ENTRY_TYPE_MOUSE_MOVE},
{"\033[MC", MP_INPUT_RELEASE_ALL, .skip = 2, .type = ENTRY_TYPE_MOUSE_MOVE},
{0}
};
@ -250,7 +272,7 @@ static void process_input(struct input_ctx *input_ctx, bool timeout)
continue;
}
int seq_len = strlen(match->seq);
int seq_len = strlen(match->seq) + match->skip;
if (seq_len > buf.len)
goto read_more; /* partial match */
@ -264,7 +286,23 @@ static void process_input(struct input_ctx *input_ctx, bool timeout)
continue;
}
mp_input_put_key(input_ctx, buf.mods | match->mpkey);
// Parse the initially skipped mouse position information.
// The positions are 1-based character cell positions plus 32.
// Treat mouse position as the pixel values at the center of the cell.
if ((match->type == ENTRY_TYPE_MOUSE_BUTTON ||
match->type == ENTRY_TYPE_MOUSE_MOVE) && seq_len >= 6)
{
int num_rows = 80;
int num_cols = 25;
int total_px_width = 0;
int total_px_height = 0;
terminal_get_size2(&num_rows, &num_cols, &total_px_width, &total_px_height);
mp_input_set_mouse_pos(input_ctx,
(buf.b[4] - 32.5) * (total_px_width / num_cols),
(buf.b[5] - 32.5) * (total_px_height / num_rows));
}
if (match->type != ENTRY_TYPE_MOUSE_MOVE)
mp_input_put_key(input_ctx, buf.mods | match->mpkey);
skip_buf(&buf, seq_len);
}

3
osdep/terminal.h
View File

@ -35,6 +35,9 @@
#define TERM_ESC_ALT_SCREEN "\033[?1049h"
#define TERM_ESC_NORMAL_SCREEN "\033[?1049l"
#define TERM_ESC_ENABLE_MOUSE "\033[?1003h"
#define TERM_ESC_DISABLE_MOUSE "\033[?1003l"
struct input_ctx;
/* Global initialization for terminal output. */