X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/e5d77022e8429ca757746ed5d7cf9e2420703e8e..cb05942644e5507f43d82b0ef3797672117ca383:/src/termhooks.h diff --git a/src/termhooks.h b/src/termhooks.h index 5b5cac7315..b13c632a03 100644 --- a/src/termhooks.h +++ b/src/termhooks.h @@ -1,6 +1,6 @@ /* Hooks by which low level terminal operations can be made to call other routines. - Copyright (C) 1985, 1986, 1992 Free Software Foundation, Inc. + Copyright (C) 1985, 1986, 1993, 1994 Free Software Foundation, Inc. This file is part of GNU Emacs. @@ -16,80 +16,209 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Emacs; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ +the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +/* Miscellanea. */ -extern int (*cursor_to_hook) (); -extern int (*raw_cursor_to_hook) (); +struct glyph; +struct frame; -extern int (*clear_to_end_hook) (); -extern int (*clear_screen_hook) (); -extern int (*clear_end_of_line_hook) (); +/* 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)); -extern int (*ins_del_lines_hook) (); -extern int (*change_line_highlight_hook) (); -extern int (*reassert_line_highlight_hook) (); + +/* Multi-frame and mouse support hooks. */ -extern int (*insert_glyphs_hook) (); -extern int (*write_glyphs_hook) (); -extern int (*delete_glyphs_hook) (); +enum scroll_bar_part { + scroll_bar_above_handle, + scroll_bar_handle, + scroll_bar_below_handle, + scroll_bar_up_arrow, + scroll_bar_down_arrow, + scroll_bar_to_top, + scroll_bar_to_bottom, + scroll_bar_end_scroll, + 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. -extern int (*ring_bell_hook) (); + 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. -extern int (*reset_terminal_modes_hook) (); -extern int (*set_terminal_modes_hook) (); -extern int (*update_begin_hook) (); -extern int (*update_end_hook) (); -extern int (*set_terminal_window_hook) (); + Otherwise, set *bar_window to Qnil, and *x and *y to the column and + row of the character cell the mouse is over. -extern int (*read_socket_hook) (); + Set *time to the time the mouse was at the returned position. -/* Return the current position of the mouse. This should clear - mouse_moved until the next motion event arrives. */ -extern void (*mouse_position_hook) ( /* SCREEN_PTR *s, + 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 */ ); + 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 screen's focus redirection is changed, this hook tells the +/* 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 (*screen_rehighlight_hook) ( /* void */ ); +extern void (*frame_rehighlight_hook) P_ ((struct frame *)); -/* If nonzero, send all terminal output characters to this stream also. */ -extern FILE *termscript; +/* 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. -/* Expedient hack: only provide the below definitions to files that - are prepared to handle lispy things. XINT is defined iff lisp.h - has been included before this file. */ -#ifdef XINT + 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)); -/* The keyboard input buffer is an array of these structures. Each one - represents some sort of input event - a keystroke, a mouse click, or - a window system event. These get turned into their lispy forms when - they are removed from the event queue. */ + +/* Scroll bar hooks. */ -struct input_event { +/* 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. - /* What kind of event was this? */ - enum { - no_event, /* nothing happened. This should never + 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. */ + +/* Expedient hack: only provide the below definitions to files that + are prepared to handle lispy things. CONSP is defined iff lisp.h + has been included before this file. */ +#ifdef CONSP + +enum event_kind +{ + no_event, /* nothing happened. This should never actually appear in the event queue. */ - ascii_keystroke, /* The ASCII code is in .code. - .screen is the screen in which the key - was typed. - Note that this includes meta-keys, and - the modifiers field of the event - is unused. + + ascii_keystroke, /* The ASCII code is in .code, perhaps + with modifiers applied. + .modifiers holds the state of the + modifier keys. + .frame_or_window is the frame in + which the key was typed. .timestamp gives a timestamp (in milliseconds) for the keystroke. */ - non_ascii_keystroke, /* .code is a number identifying the + multibyte_char_keystroke, /* The multibye char code is in .code, + perhaps with modifiers applied. + The others are the same as + ascii_keystroke. This type of event + is generated only when we are using + XIM on X window. */ + non_ascii_keystroke, /* .code is a number identifying the function key. A code N represents a key whose name is function_key_names[N]; function_key_names @@ -97,72 +226,204 @@ struct input_event { should feel free to add missing keys. .modifiers holds the state of the modifier keys. - .screen is the screen in which the key - was typed. + .frame_or_window is the frame in + which the key was typed. .timestamp gives a timestamp (in milliseconds) for the keystroke. */ - mouse_click, /* The button number is in .code. + timer_event, /* A timer fired. */ + mouse_click, /* The button number is in .code; it must + be >= 0 and < NUM_MOUSE_BUTTONS, defined + below. .modifiers holds the state of the modifier keys. .x and .y give the mouse position, in characters, within the window. - .screen gives the screen the mouse - click occurred in. + .frame_or_window gives the frame + the mouse 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. - .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 +#ifdef WINDOWSNT + mouse_wheel, /* A mouse-wheel event is generated + on WINDOWSNT by a + wheel on a mouse (e.g., MS Intellimouse). + The event contains a delta that corresponds + to the amount and direction that the wheel + is rotated. This delta is typically + used to implement a scroll or zoom. + .code gives the delta. + .modifiers holds 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. - .screen gives the screen the click - should apply to. + .x and .y give the mouse position, + in characters, within the window. + .frame_or_window gives the frame + the wheel event occurred in. + .timestamp gives a timestamp (in + milliseconds) for the wheel event. */ + language_change_event, /* A language_change event is generated + on WINDOWSNT when the keyboard layout + or input language is changed by the + user. */ +#endif + scroll_bar_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 scroll bar got clicked. + .x gives the distance from the start of the + scroll bar of the click; .y gives the total + length of the scroll bar. + .frame_or_window gives the window + whose scroll bar was clicked in. .timestamp gives a timestamp (in milliseconds) for the click. */ -#if 0 - screen_selected, /* The user has moved the focus to another - screen. - .screen is the screen that should become - selected at the next convenient time. */ +#ifdef WINDOWSNT + w32_scroll_bar_click, /* as for scroll_bar_click, but only generated + by MS-Windows scroll bar controls. */ #endif - } kind; + selection_request_event, /* Another X client wants a selection from us. + See `struct selection_event'. */ + selection_clear_event, /* Another X client cleared our selection. */ + buffer_switch_event, /* A process filter has switched buffers. */ + delete_window_event, /* An X client said "delete this window". */ + MENU_BAR_EVENT, /* An event generated by the menu bar. + The frame_or_window field's cdr holds the + Lisp-level event value. + (Only the toolkit version uses these.) */ + iconify_event, /* An X client iconified this window. */ + deiconify_event, /* An X client deiconified this window. */ + menu_bar_activate_event, /* A button press in the menu bar + (toolkit version only). */ + drag_n_drop, /* A drag-n-drop event is generated when + files selected outside of Emacs are dropped + onto an Emacs window. + Currently used only on Windows NT. + .modifiers holds the state of the + modifier keys. + .x and .y give the mouse position, + in characters, within the window. + .frame_or_window is a cons of the frame + in which the drop was made and a list of + the filenames of the dropped files. + .timestamp gives a timestamp (in + milliseconds) for the click. */ + USER_SIGNAL_EVENT, /* A user signal. + code is a number identifying it, + index into lispy_user_signals. */ + + /* Help events. Member `frame_or_window' of the input_event is the + frame on which the event occurred, and member `arg' contains + the help to show. */ + HELP_EVENT, + + /* An event from a tool-bar. Member `arg' of the input event + contains the tool-bar item selected. If `frame_or_window' + and `arg' are equal, this is a prefix event. */ + TOOL_BAR_EVENT, + + /* Queued from XTread_socket on FocusIn events. Translated into + `switch-frame' events in kbd_buffer_get_event, if necessary. */ + FOCUS_IN_EVENT +}; + +/* If a struct input_event has a kind which is selection_request_event + or selection_clear_event, then its contents are really described + by `struct selection_event'; see xterm.h. */ + +/* The keyboard input buffer is an array of these structures. Each one + represents some sort of input event - a keystroke, a mouse click, or + a window system event. These get turned into their lispy forms when + they are removed from the event queue. */ + +struct input_event +{ + /* What kind of event was this? */ + enum event_kind kind; - Lisp_Object code; - Lisp_Object part; - -/* This is obviously wrong, but I'm not sure what else I should do. - Obviously, this should be a SCREEN_PTR. But that would require that - every file which #includes this one should also #include "screen.h", - which would mean that files like cm.c and other innocents would be - dragged into the set of screen.h users. Maybe the definition of this - structure should be elsewhere? In its own file? */ -#ifdef MULTI_SCREEN - struct screen *screen; -#else - int screen; -#endif + /* For an ascii_keystroke and multibyte_char_keystroke, this is the + character. + For a non_ascii_keystroke, this is the keysym code. + For a mouse event, this is the button number. */ + /* In WindowsNT, for a mouse wheel event, this is the delta. */ + int code; + enum scroll_bar_part part; + int modifiers; /* See enum below for interpretation. */ Lisp_Object x, y; unsigned long timestamp; + + /* This is padding just to put the frame_or_window field + past the size of struct selection_event. */ + int *padding[2]; + + /* This field is copied into a vector while the event is in the queue, + so that garbage collections won't kill it. */ + /* In a menu_bar_event, this is a cons cell whose car is the frame + and whose cdr is the Lisp object that is the event's value. */ + /* This field is last so that struct selection_input_event + does not overlap with it. */ + Lisp_Object frame_or_window; + + /* Additional event argument. This is used for TOOL_BAR_EVENTs and + HELP_EVENTs and avoids calling Fcons during signal handling. */ + Lisp_Object arg; }; -/* Bits in the modifiers member of the input_event structure. */ +/* Called to read input events. */ +extern int (*read_socket_hook) P_ ((int, struct input_event *, int, int)); + +/* 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. + + The modifiers applied to mouse clicks are rather ornate. The + window-system-specific code should store mouse clicks with + up_modifier or down_modifier set. Having an explicit down modifier + simplifies some of window-system-independent code; without it, the + code would have to recognize down events by checking if the event + is a mouse click lacking the click and drag modifiers. + + The window-system independent code turns all up_modifier events + bits into drag_modifier, click_modifier, double_modifier, or + triple_modifier events. The click_modifier has no written + representation in the names of the symbols used as event heads, + but it does appear in the Qevent_symbol_components property of the + event heads. */ enum { - shift_modifier = 1, - ctrl_modifier = 2, - meta_modifier = 4, - up_modifier = 8, /* This only applies to mouse buttons. */ - last_modifier /* This should always be one more than the - highest modifier bit defined. */ -}; + up_modifier = 1, /* Only used on mouse buttons - always + turned into a click or a drag modifier + before lisp code sees the event. */ + down_modifier = 2, /* Only used on mouse buttons. */ + drag_modifier = 4, /* This is never used in the event + queue; it's only used internally by + the window-system-independent code. */ + click_modifier= 8, /* See drag_modifier. */ + double_modifier= 16, /* See drag_modifier. */ + triple_modifier= 32, /* See drag_modifier. */ + + /* The next four modifier bits are used also in keyboard events at + the Lisp level. -#define NUM_MODIFIER_COMBOS ((last_modifier-1) << 1) + It's probably not the greatest idea to use the 2^23 bit for any + modifier. It may or may not be the sign bit, depending on + VALBITS, so using it to represent a modifier key means that + characters thus modified have different integer equivalents + depending on the architecture they're running on. Oh, and + applying XINT to a character whose 2^23 bit is set sign-extends + it, so you get a bunch of bits in the mask you didn't want. + + The CHAR_ macros are defined in lisp.h. */ + alt_modifier = CHAR_ALT, /* Under X, the XK_Alt_[LR] keysyms. */ + super_modifier= CHAR_SUPER, /* Under X, the XK_Super_[LR] keysyms. */ + hyper_modifier= CHAR_HYPER, /* Under X, the XK_Hyper_[LR] keysyms. */ + shift_modifier= CHAR_SHIFT, + ctrl_modifier = CHAR_CTL, + meta_modifier = CHAR_META /* Under X, the XK_Meta_[LR] keysyms. */ +}; #endif