diff options
Diffstat (limited to 'src/termhooks.h')
| -rw-r--r-- | src/termhooks.h | 86 |
1 files changed, 65 insertions, 21 deletions
diff --git a/src/termhooks.h b/src/termhooks.h index c7f9d3d0909..63be5709999 100644 --- a/src/termhooks.h +++ b/src/termhooks.h @@ -45,9 +45,19 @@ extern int (*set_terminal_window_hook) (); extern int (*read_socket_hook) (); -/* Return the current position of the mouse. This should clear - mouse_moved until the next motion event arrives. */ +enum scrollbar_part { + scrollbar_above_handle, + scrollbar_handle, + scrollbar_below_handle +}; + +/* Return the current position of the mouse. + Set `bar' to point to the scrollbar if the mouse movement started + in a scrollbar, or zero if it started elsewhere in the frame. + This should clear mouse_moved until the next motion event arrives. */ extern void (*mouse_position_hook) ( /* FRAME_PTR *f, + struct scrollbar **bar, + enum scrollbar_part *part, Lisp_Object *x, Lisp_Object *y, unsigned long *time */ ); @@ -62,6 +72,39 @@ extern int mouse_moved; X, this means that Emacs lies about where the focus is. */ extern void (*frame_rehighlight_hook) ( /* void */ ); +/* Set vertical scollbar BAR to have its upper left corner at (TOP, + LEFT), and be LENGTH rows high. Set its handle to indicate that we + are displaying PORTION characters out of a total of WHOLE + characters, starting at POSITION. Return BAR. If BAR is zero, + create a new scrollbar and return a pointer to it. */ +extern struct scrollbar *(*set_vertical_scrollbar_hook) + ( /* struct scrollbar *BAR, + struct window *window, + int portion, int whole, int position */ ); + + +/* The following three hooks are used when we're doing a thorough + redisplay of the frame. We don't explicitly know which scrollbars + are going to be deleted, because keeping track of when windows go + away is a real pain - can you say set-window-configuration? + Instead, we just assert at the beginning of redisplay that *all* + scrollbars are to be removed, and then save scrollbars from the + firey pit when we actually redisplay their window. */ + +/* Arrange for all scrollbars on FRAME to be removed at the next call + to `*judge_scrollbars_hook'. A scrollbar may be spared if + `*redeem_scrollbar_hook' is applied to it before the judgement. */ +extern void (*condemn_scrollbars_hook)( /* FRAME_PTR *FRAME */ ); + +/* Unmark BAR for deletion in this judgement cycle. */ +extern void (*redeem_scrollbar_hook)( /* struct scrollbar *BAR */ ); + +/* Remove all scrollbars on FRAME that haven't been saved since the + last call to `*condemn_scrollbars_hook'. */ +extern void (*judge_scrollbars_hook)( /* FRAME_PTR *FRAME */ ); + + + /* If nonzero, send all terminal output characters to this stream also. */ extern FILE *termscript; @@ -112,31 +155,32 @@ struct input_event { click occurred in. .timestamp gives a timestamp (in milliseconds) for the click. */ - scrollbar_click, /* .code gives the number of the mouse - button that was clicked. + + scrollbar_click, /* .code gives the number of the mouse button + that was clicked. + .modifiers holds the state of the modifier + keys. .part is a lisp symbol indicating which - part of the scrollbar got clicked. This - indicates whether the scroll bar was - horizontal or vertical. - .modifiers gives the state of the - modifier keys. - .x gives the distance from the start - of the scroll bar of the click; .y gives - the total length of the scroll bar. - .frame gives the frame the click - should apply to. + part of the scrollbar got clicked. + .scrollbar is a pointer to the scrollbar + clicked on. Since redisplay may delete + scrollbars at any time, you may not assume + that this scrollbar still exists when you + dequeue this event. You have to traverse + the window tree to make it's in a valid + window. + .x gives the distance from the start of the + scroll bar of the click; .y gives the total + length of the scroll bar. + .frame gives the frame the click should + apply to. .timestamp gives a timestamp (in milliseconds) for the click. */ -#if 0 - frame_selected, /* The user has moved the focus to another - frame. - .frame is the frame that should become - selected at the next convenient time. */ -#endif } kind; Lisp_Object code; - Lisp_Object part; + enum scrollbar_part part; + struct scrollbar *scrollbar; /* This is obviously wrong, but I'm not sure what else I should do. Obviously, this should be a FRAME_PTR. But that would require that |