diff options
Diffstat (limited to 'src/termhooks.h')
| -rw-r--r-- | src/termhooks.h | 438 |
1 files changed, 281 insertions, 157 deletions
diff --git a/src/termhooks.h b/src/termhooks.h index 83721f65912..49a0cbac85b 100644 --- a/src/termhooks.h +++ b/src/termhooks.h @@ -1,5 +1,4 @@ -/* Hooks by which low level terminal operations - can be made to call other routines. +/* Parameters and display hooks for output devices Copyright (C) 1985,86,93,94,2003 Free Software Foundation, Inc. This file is part of GNU Emacs. @@ -25,40 +24,11 @@ Boston, MA 02111-1307, USA. */ struct glyph; struct frame; -/* If nonzero, send all terminal output characters to this stream also. */ -extern FILE *termscript; - /* Only use prototypes when lisp.h has been included. */ #ifndef P_ #define P_(X) () #endif -/* Text display hooks. */ - -extern void (*cursor_to_hook) P_ ((int vpos, int hpos)); -extern void (*raw_cursor_to_hook) P_ ((int, int)); - -extern void (*clear_to_end_hook) P_ ((void)); -extern void (*clear_frame_hook) P_ ((void)); -extern void (*clear_end_of_line_hook) P_ ((int)); - -extern void (*ins_del_lines_hook) P_ ((int, int)); - -extern void (*insert_glyphs_hook) P_ ((struct glyph *s, int n)); -extern void (*write_glyphs_hook) P_ ((struct glyph *s, int n)); -extern void (*delete_glyphs_hook) P_ ((int)); - -extern void (*ring_bell_hook) P_ ((void)); - -extern void (*reset_terminal_modes_hook) P_ ((void)); -extern void (*set_terminal_modes_hook) P_ ((void)); -extern void (*update_begin_hook) P_ ((struct frame *)); -extern void (*update_end_hook) P_ ((struct frame *)); -extern void (*set_terminal_window_hook) P_ ((int)); - - - -/* Multi-frame and mouse support hooks. */ enum scroll_bar_part { scroll_bar_above_handle, @@ -72,125 +42,6 @@ enum scroll_bar_part { scroll_bar_move_ratio }; -/* Return the current position of the mouse. - - Set *f to the frame the mouse is in, or zero if the mouse is in no - Emacs frame. If it is set to zero, all the other arguments are - garbage. - - If the motion started in a scroll bar, set *bar_window to the - scroll bar's window, *part to the part the mouse is currently over, - *x to the position of the mouse along the scroll bar, and *y to the - overall length of the scroll bar. - - Otherwise, set *bar_window to Qnil, and *x and *y to the column and - row of the character cell the mouse is over. - - Set *time to the time the mouse was at the returned position. - - This should clear mouse_moved until the next motion - event arrives. */ -extern void (*mouse_position_hook) P_ ((struct frame **f, int, - Lisp_Object *bar_window, - enum scroll_bar_part *part, - Lisp_Object *x, - Lisp_Object *y, - unsigned long *time)); - -/* The window system handling code should set this if the mouse has - moved since the last call to the mouse_position_hook. Calling that - hook should clear this. */ -extern int mouse_moved; - -/* When a frame's focus redirection is changed, this hook tells the - window system code to re-decide where to put the highlight. Under - X, this means that Emacs lies about where the focus is. */ -extern void (*frame_rehighlight_hook) P_ ((struct frame *)); - -/* If we're displaying frames using a window system that can stack - frames on top of each other, this hook allows you to bring a frame - to the front, or bury it behind all the other windows. If this - hook is zero, that means the device we're displaying on doesn't - support overlapping frames, so there's no need to raise or lower - anything. - - If RAISE is non-zero, F is brought to the front, before all other - windows. If RAISE is zero, F is sent to the back, behind all other - windows. */ -extern void (*frame_raise_lower_hook) P_ ((struct frame *f, int raise)); - - -/* Scroll bar hooks. */ - -/* The representation of scroll bars is determined by the code which - implements them, except for one thing: they must be represented by - lisp objects. This allows us to place references to them in - Lisp_Windows without worrying about those references becoming - dangling references when the scroll bar is destroyed. - - The window-system-independent portion of Emacs just refers to - scroll bars via their windows, and never looks inside the scroll bar - representation; it always uses hook functions to do all the - scroll bar manipulation it needs. - - The `vertical_scroll_bar' field of a Lisp_Window refers to that - window's scroll bar, or is nil if the window doesn't have a - scroll bar. - - The `scroll_bars' and `condemned_scroll_bars' fields of a Lisp_Frame - are free for use by the scroll bar implementation in any way it sees - fit. They are marked by the garbage collector. */ - - -/* Set the vertical scroll bar for WINDOW 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. If WINDOW doesn't yet - have a scroll bar, create one for it. */ -extern void (*set_vertical_scroll_bar_hook) - P_ ((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 scroll bars - 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* - scroll bars are to be removed, and then save scroll bars from the - fiery pit when we actually redisplay their window. */ - -/* Arrange for all scroll bars on FRAME to be removed at the next call - to `*judge_scroll_bars_hook'. A scroll bar may be spared if - `*redeem_scroll_bar_hook' is applied to its window before the judgement. - - This should be applied to each frame each time its window tree is - redisplayed, even if it is not displaying scroll bars at the moment; - if the HAS_SCROLL_BARS flag has just been turned off, only calling - this and the judge_scroll_bars_hook will get rid of them. - - If non-zero, this hook should be safe to apply to any frame, - whether or not it can support scroll bars, and whether or not it is - currently displaying them. */ -extern void (*condemn_scroll_bars_hook) P_ ((struct frame *frame)); - -/* Unmark WINDOW's scroll bar for deletion in this judgement cycle. - Note that it's okay to redeem a scroll bar that is not condemned. */ -extern void (*redeem_scroll_bar_hook) P_ ((struct window *window)); - -/* Remove all scroll bars on FRAME that haven't been saved since the - last call to `*condemn_scroll_bars_hook'. - - This should be applied to each frame after each time its window - tree is redisplayed, even if it is not displaying scroll bars at the - moment; if the HAS_SCROLL_BARS flag has just been turned off, only - calling this and condemn_scroll_bars_hook will get rid of them. - - If non-zero, this hook should be safe to apply to any frame, - whether or not it can support scroll bars, and whether or not it is - currently displaying them. */ -extern void (*judge_scroll_bars_hook) P_ ((struct frame *FRAME)); - /* Input queue declarations and hooks. */ @@ -373,13 +224,6 @@ struct input_event #define EVENT_INIT(event) bzero (&(event), sizeof (struct input_event)) -/* Called to read input events. */ -extern int (*read_socket_hook) P_ ((int, int, struct input_event *)); - -/* Called when a frame's display becomes entirely up to date. */ -extern void (*frame_up_to_date_hook) P_ ((struct frame *)); - - /* Bits in the modifiers member of the input_event structure. Note that reorder_modifiers assumes that the bits are in canonical order. @@ -429,7 +273,287 @@ enum { meta_modifier = CHAR_META /* Under X, the XK_Meta_[LR] keysyms. */ }; +#endif /* CONSP */ + + +/* Display-local parameters. */ +struct display +{ + /* Chain of all displays. */ + struct display *next_display; + + /* The number of frames that are on this display. */ + int reference_count; + + /* The type of the display. */ + enum output_method type; + + /* Display-type dependent data shared amongst all frames on this display. */ + union display_info + { + struct tty_display_info *tty; /* termchar.h */ + struct x_display_info *x; /* xterm.h */ + } display_info; + + + /* Terminal characteristics. */ + /* XXX Are these really used on non-termcap displays? */ + + int must_write_spaces; /* Nonzero means spaces in the text must + actually be output; can't just skip over + some columns to leave them blank. */ + int fast_clear_end_of_line; /* Nonzero means terminal has a `ce' string */ + + int line_ins_del_ok; /* Terminal can insert and delete lines */ + int char_ins_del_ok; /* Terminal can insert and delete chars */ + int scroll_region_ok; /* Terminal supports setting the scroll + window */ + int scroll_region_cost; /* Cost of setting the scroll window, + measured in characters. */ + int memory_below_frame; /* Terminal remembers lines scrolled + off bottom */ + +#if 0 /* These are not used anywhere. */ + /* EMACS_INT baud_rate; */ /* Output speed in baud */ + int min_padding_speed; /* Speed below which no padding necessary. */ + int dont_calculate_costs; /* Nonzero means don't bother computing + various cost tables; we won't use them. */ #endif + + /* Window-based redisplay interface for this device (0 for tty + devices). */ + struct redisplay_interface *rif; + + /* Frame-based redisplay interface. */ + + /* Text display hooks. */ + + void (*cursor_to_hook) P_ ((int vpos, int hpos)); + void (*raw_cursor_to_hook) P_ ((int, int)); + + void (*clear_to_end_hook) P_ ((void)); + void (*clear_frame_hook) P_ ((void)); + void (*clear_end_of_line_hook) P_ ((int)); + + void (*ins_del_lines_hook) P_ ((int, int)); + + void (*insert_glyphs_hook) P_ ((struct glyph *s, int n)); + void (*write_glyphs_hook) P_ ((struct glyph *s, int n)); + void (*delete_glyphs_hook) P_ ((int)); + + void (*ring_bell_hook) P_ ((void)); + + void (*reset_terminal_modes_hook) P_ ((struct display *)); + void (*set_terminal_modes_hook) P_ ((struct display *)); + void (*update_begin_hook) P_ ((struct frame *)); + void (*update_end_hook) P_ ((struct frame *)); + void (*set_terminal_window_hook) P_ ((int)); + + /* Multi-frame and mouse support hooks. */ + + /* Return the current position of the mouse. + + Set *f to the frame the mouse is in, or zero if the mouse is in no + Emacs frame. If it is set to zero, all the other arguments are + garbage. + + If the motion started in a scroll bar, set *bar_window to the + scroll bar's window, *part to the part the mouse is currently over, + *x to the position of the mouse along the scroll bar, and *y to the + overall length of the scroll bar. + + Otherwise, set *bar_window to Qnil, and *x and *y to the column and + row of the character cell the mouse is over. + + Set *time to the time the mouse was at the returned position. + + This should clear mouse_moved until the next motion + event arrives. */ + void (*mouse_position_hook) P_ ((struct frame **f, int, + Lisp_Object *bar_window, + enum scroll_bar_part *part, + Lisp_Object *x, + Lisp_Object *y, + unsigned long *time)); + + /* The window system handling code should set this if the mouse has + moved since the last call to the mouse_position_hook. Calling that + hook should clear this. */ + int mouse_moved; + + /* When a frame's focus redirection is changed, this hook tells the + window system code to re-decide where to put the highlight. Under + X, this means that Emacs lies about where the focus is. */ + void (*frame_rehighlight_hook) P_ ((struct frame *)); + + /* If we're displaying frames using a window system that can stack + frames on top of each other, this hook allows you to bring a frame + to the front, or bury it behind all the other windows. If this + hook is zero, that means the device we're displaying on doesn't + support overlapping frames, so there's no need to raise or lower + anything. + + If RAISE is non-zero, F is brought to the front, before all other + windows. If RAISE is zero, F is sent to the back, behind all other + windows. */ + void (*frame_raise_lower_hook) P_ ((struct frame *f, int raise)); + + + /* Scroll bar hooks. */ + + /* The representation of scroll bars is determined by the code which + implements them, except for one thing: they must be represented by + lisp objects. This allows us to place references to them in + Lisp_Windows without worrying about those references becoming + dangling references when the scroll bar is destroyed. + + The window-system-independent portion of Emacs just refers to + scroll bars via their windows, and never looks inside the scroll bar + representation; it always uses hook functions to do all the + scroll bar manipulation it needs. + + The `vertical_scroll_bar' field of a Lisp_Window refers to that + window's scroll bar, or is nil if the window doesn't have a + scroll bar. + + The `scroll_bars' and `condemned_scroll_bars' fields of a Lisp_Frame + are free for use by the scroll bar implementation in any way it sees + fit. They are marked by the garbage collector. */ + + + /* Set the vertical scroll bar for WINDOW 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. If WINDOW doesn't yet + have a scroll bar, create one for it. */ + void (*set_vertical_scroll_bar_hook) P_ ((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 scroll bars + 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* + scroll bars are to be removed, and then save scroll bars from the + fiery pit when we actually redisplay their window. */ + + /* Arrange for all scroll bars on FRAME to be removed at the next call + to `*judge_scroll_bars_hook'. A scroll bar may be spared if + `*redeem_scroll_bar_hook' is applied to its window before the judgement. + + This should be applied to each frame each time its window tree is + redisplayed, even if it is not displaying scroll bars at the moment; + if the HAS_SCROLL_BARS flag has just been turned off, only calling + this and the judge_scroll_bars_hook will get rid of them. + + If non-zero, this hook should be safe to apply to any frame, + whether or not it can support scroll bars, and whether or not it is + currently displaying them. */ + void (*condemn_scroll_bars_hook) P_ ((struct frame *frame)); + + /* Unmark WINDOW's scroll bar for deletion in this judgement cycle. + Note that it's okay to redeem a scroll bar that is not condemned. */ + void (*redeem_scroll_bar_hook) P_ ((struct window *window)); + + /* Remove all scroll bars on FRAME that haven't been saved since the + last call to `*condemn_scroll_bars_hook'. + + This should be applied to each frame after each time its window + tree is redisplayed, even if it is not displaying scroll bars at the + moment; if the HAS_SCROLL_BARS flag has just been turned off, only + calling this and condemn_scroll_bars_hook will get rid of them. + + If non-zero, this hook should be safe to apply to any frame, + whether or not it can support scroll bars, and whether or not it is + currently displaying them. */ + void (*judge_scroll_bars_hook) P_ ((struct frame *FRAME)); + + + /* Called to read input events. + + DISPLAY indicates which display to read from. Input events + should be read into BUF, the size of which is given in SIZE. + EXPECTED is non-zero if the caller suspects that new input is + available. + + A positive return value indicates that that many input events + where read into BUF. + Zero means no events were immediately available. + A value of -1 means a transient read error, while -2 indicates + that the display was closed (hangup), and it should be deleted. + + XXX Please note that a non-zero value of EXPECTED only means that + there is available input on at least one of the currently opened + display devices -- but not necessarily on this device. + Therefore, in most cases EXPECTED should be simply ignored. + + XXX This documentation needs to be updated. */ + int (*read_socket_hook) P_ ((struct display *display, + int expected, + struct input_event *hold_quit)); + + /* Called when a frame's display becomes entirely up to date. */ + void (*frame_up_to_date_hook) P_ ((struct frame *)); + + + /* Called to delete the device-specific portions of a frame that is + on this display. */ + void (*delete_frame_hook) P_ ((struct frame *)); + + /* Called after the last frame on this display is deleted, or when + the display device was closed (hangup). + + If this is NULL, then the generic delete_display() is called + instead. + + The hook must check for and close any live frames that are still + on the display. Fdelete_frame ensures that there are no live + frames on the display when it calls this hook, so infinite + recursion is prevented. */ + void (*delete_display_hook) P_ ((struct display *)); +}; + + +/* Chain of all displays currently in use. */ +extern struct display *display_list; + +#define FRAME_MUST_WRITE_SPACES(f) ((f)->display->must_write_spaces) +#define FRAME_FAST_CLEAR_END_OF_LINE(f) ((f)->display->fast_clear_end_of_line) +#define FRAME_LINE_INS_DEL_OK(f) ((f)->display->line_ins_del_ok) +#define FRAME_CHAR_INS_DEL_OK(f) ((f)->display->char_ins_del_ok) +#define FRAME_SCROLL_REGION_OK(f) ((f)->display->scroll_region_ok) +#define FRAME_SCROLL_REGION_COST(f) ((f)->display->scroll_region_cost) +#define FRAME_MEMORY_BELOW_FRAME(f) ((f)->display->memory_below_frame) + +#define FRAME_RIF(f) ((f)->display->rif) + +#define FRAME_DISPLAY(f) ((f)->display) + +/* FRAME_WINDOW_P tests whether the frame is a window, and is + defined to be the predicate for the window system being used. */ + +#ifdef HAVE_X_WINDOWS +#define FRAME_WINDOW_P(f) FRAME_X_P (f) +#endif +#ifdef HAVE_NTGUI +#define FRAME_WINDOW_P(f) FRAME_W32_P (f) +#endif +#ifdef MAC_OS +#define FRAME_WINDOW_P(f) FRAME_MAC_P (f) +#endif +#ifndef FRAME_WINDOW_P +#define FRAME_WINDOW_P(f) (0) +#endif + + +extern struct display *create_display P_ ((void)); +extern void delete_display P_ ((struct display *)); + +/* The initial display device, created by initial_term_init. */ +extern struct display *initial_display; + /* arch-tag: 33a00ecc-52b5-4186-a410-8801ac9f087d (do not change this comment) */ |