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elinks/src/terminal/mouse.h
Witold Filipczyk 0aeb8b4c25 [mouse] enabled mouse in DOS
Also redefined constants in mouse.h to be consistent with links.
2022-05-10 19:19:49 +02:00

135 lines
4.3 KiB
C

#ifndef EL__TERMINAL_MOUSE_H
#define EL__TERMINAL_MOUSE_H
#ifdef __cplusplus
extern "C" {
#endif
struct interlink_event;
struct itrm;
struct session;
extern int mouse_enabled;
/* The mouse reporting button byte looks like:
*
* -ss??bbb
* || |||
* || +++---> buttons:
* || 0 left
* || 1 middle
* || 2 right
* || 3 release OR wheel up [rxvt]
* || 4 wheel down [rxvt]
* ||
* ++--------> style:
* 1 normalclick (makes sure the whole thing is >= ' ')
* 2 doubleclick
* 3 mouse wheel move [xterm]
* then in bb is 0 for up and 1 for down
*
* What we translate it to:
* -da??bbb
* || |||
* || +++---> buttons:
* || 0 left
* || 1 middle
* || 2 right
* || 3 wheel up
* || 4 wheel down
* ||
* |+--------> action:
* | 0 press (B_DOWN)
* | 1 release (B_UP)
* |
* +---------> drag flag (valid only for B_UP)
*
* (TODO: doubleclick facility? --pasky)
*
* Let me introduce to the wonderful world of X terminals and their handling of
* mouse wheel now. First, one sad fact: reasonable mouse wheel reporting
* support has only xterm itself (from everything I tried) - it is relatively
* elegant, it shouldn't confuse existing applications too much and it is
* generally non-conflicting with the old behaviour.
*
* All other terminals are doing absolutely terrible things, making it hell on
* the hearth to support mouse wheels. rxvt will send the buttons as succeeding
* button numbers (3, 4) in normal sequences, but that has a little problem -
* button 3 is also alias for button release; welcome to the wonderful world of
* X11. But at least, rxvt will send only "press" sequence, but no release
* sequence (it really doesn't make sense for wheels anyway, does it?). That
* has the advantage that you can do some heuristic (see below) to at least
* partially pace with this terrible thing.
*
* But now, let's see another nice pair of wonderful terminals: aterm and
* Eterm. They emit same braindead sequence for wheel up/down as rxvt, but
* that's not all. Yes, you guessed it - they send even the release sequence
* (immediatelly after press sequence) for the wheels. So, you will see
* something like:
*
* old glasses - <button1 press> <release> <release> <release>
* new glasses - <button1 press> <wheelup press> <wheelup press> <wheelup press>
* smartglasses1-<button1 press> <release> <wheelup press> <wheelup press>
* smartglasses2-<button1 press> <release> <wheelup press> <release>
*
* But with smartglasses2, you will have a problem with rxvt when someone will
* move the wheel multiple times - only half of the times it will be recorded.
* Poof. No luck :-(.
*
* [smartglasses1]:
* When user presses some button and then moves the wheel, action for button
* release will be done and when he will release the button, action for the
* wheel will be done. That's unfortunately inevitable in order to work under
* rxvt :-(.
*/
struct term_event_mouse {
int x, y;
unsigned int button;
};
#define interlink_event_mouse term_event_mouse
#define BM_BUTT 7
#define B_LEFT 0
#define B_MIDDLE 1
#define B_RIGHT 2
#define B_WHEEL_UP 3
#define B_WHEEL_DOWN 4
#define BM_ACT 48
#define B_DOWN 0
#define B_UP 16
#define B_DRAG 32
#define B_MOVE 48
#define BM_DRAG 64
#define mouse_get_action(mouse_) ((mouse_)->button & BM_ACT)
#define mouse_action_is(mouse_, value) (mouse_get_action(mouse_) == (value))
#define mouse_get_button(mouse_) ((mouse_)->button & BM_BUTT)
#define mouse_button_is(mouse_, value) (mouse_get_button(mouse_) == (value))
#define mouse_wheeling(mouse_) (mouse_get_button(mouse_) >= B_WHEEL_UP)
#define mouse_is_in_box(mouse_, box) \
is_in_box(box, (mouse_)->x, (mouse_)->y)
#define set_mouse(mouse_, x_, y_, button_) do { \
(mouse_)->x = (x_); \
(mouse_)->y = (y_); \
(mouse_)->button = (button_); \
} while (0)
void send_mouse_init_sequence(int h);
void send_mouse_done_sequence(int h);
void disable_mouse(void);
void enable_mouse(void);
void toggle_mouse(struct session *ses);
int decode_terminal_mouse_escape_sequence(struct itrm *itrm, struct interlink_event *ev, int el, int v);
#ifdef __cplusplus
}
#endif
#endif