mode-key.c - tmux - Rivoreo Source Code Repositories

 /* $OpenBSD$ */

 /*
  * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #include <sys/types.h>

 #include <string.h>

 #include "tmux.h"

 /*
  * Mode keys. These are the key bindings used when editing (status prompt), and
  * in the modes. They are split into two sets of three tables, one set of three
  * for vi and the other for emacs key bindings. The three tables are for
  * editing, for menu-like modes (choice, more), and for copy modes (copy,
  * scroll).
  *
  * The fixed tables of struct mode_key_entry below are the defaults: they are
  * built into a tree of struct mode_key_binding by mode_key_init_trees, which
  * can then be modified.
  *
  * vi command mode is handled by having a mode flag in the struct which allows
  * two sets of bindings to be swapped between. A couple of editing commands
  * (MODEKEYEDIT_SWITCHMODE and MODEKEYEDIT_SWITCHMODEAPPEND) are special-cased
  * to do this.
  */

 /* Edit keys command strings. */
 struct mode_key_cmdstr mode_key_cmdstr_edit[] = {
 	{ MODEKEYEDIT_BACKSPACE, "backspace" },
 	{ MODEKEYEDIT_CANCEL, "cancel" },
 	{ MODEKEYEDIT_COMPLETE, "complete" },
 	{ MODEKEYEDIT_CURSORLEFT, "cursor-left" },
 	{ MODEKEYEDIT_CURSORRIGHT, "cursor-right" },
 	{ MODEKEYEDIT_DELETE, "delete" },
 	{ MODEKEYEDIT_DELETELINE, "delete-line" },
 	{ MODEKEYEDIT_DELETETOENDOFLINE, "delete-end-of-line" },
 	{ MODEKEYEDIT_ENDOFLINE, "end-of-line" },
 	{ MODEKEYEDIT_ENTER, "enter" },
 	{ MODEKEYEDIT_HISTORYDOWN, "history-down" },
 	{ MODEKEYEDIT_HISTORYUP, "history-up" },
 	{ MODEKEYEDIT_PASTE, "paste" },
 	{ MODEKEYEDIT_STARTOFLINE, "start-of-line" },
 	{ MODEKEYEDIT_SWITCHMODE, "switch-mode" },
 	{ MODEKEYEDIT_SWITCHMODEAPPEND, "switch-mode-append" },
 	{ MODEKEYEDIT_TRANSPOSECHARS, "transpose-chars" },

 	{ 0, NULL }
 };

 /* Choice keys command strings. */
 struct mode_key_cmdstr mode_key_cmdstr_choice[] = {
 	{ MODEKEYCHOICE_CANCEL, "cancel" },
 	{ MODEKEYCHOICE_CHOOSE, "choose" },
 	{ MODEKEYCHOICE_DOWN, "down" },
 	{ MODEKEYCHOICE_PAGEDOWN, "page-down" },
 	{ MODEKEYCHOICE_PAGEUP, "page-up" },
 	{ MODEKEYCHOICE_SCROLLDOWN, "scroll-down" },
 	{ MODEKEYCHOICE_SCROLLUP, "scroll-up" },
 	{ MODEKEYCHOICE_UP, "up" },

 	{ 0, NULL }
 };

 /* Copy keys command strings. */
 struct mode_key_cmdstr mode_key_cmdstr_copy[] = {
 	{ MODEKEYCOPY_BACKTOINDENTATION, "back-to-indentation" },
 	{ MODEKEYCOPY_BOTTOMLINE, "bottom-line" },
 	{ MODEKEYCOPY_CANCEL, "cancel" },
 	{ MODEKEYCOPY_CLEARSELECTION, "clear-selection" },
 	{ MODEKEYCOPY_COPYSELECTION, "copy-selection" },
 	{ MODEKEYCOPY_DOWN, "cursor-down" },
 	{ MODEKEYCOPY_ENDOFLINE, "end-of-line" },
 	{ MODEKEYCOPY_GOTOLINE, "goto-line" },
 	{ MODEKEYCOPY_HISTORYBOTTOM, "history-bottom" },
 	{ MODEKEYCOPY_HISTORYTOP, "history-top" },
 	{ MODEKEYCOPY_LEFT, "cursor-left" },
 	{ MODEKEYCOPY_RECTANGLETOGGLE, "rectangle-toggle" },
 	{ MODEKEYCOPY_MIDDLELINE, "middle-line" },
 	{ MODEKEYCOPY_NEXTPAGE, "page-down" },
 	{ MODEKEYCOPY_NEXTSPACE, "next-space" },
 	{ MODEKEYCOPY_NEXTSPACEEND, "next-space-end" },
 	{ MODEKEYCOPY_NEXTWORD, "next-word" },
 	{ MODEKEYCOPY_NEXTWORDEND, "next-word-end" },
 	{ MODEKEYCOPY_PREVIOUSPAGE, "page-up" },
 	{ MODEKEYCOPY_PREVIOUSSPACE, "previous-space" },
 	{ MODEKEYCOPY_PREVIOUSWORD, "previous-word" },
 	{ MODEKEYCOPY_RIGHT, "cursor-right" },
 	{ MODEKEYCOPY_SCROLLDOWN, "scroll-down" },
 	{ MODEKEYCOPY_SCROLLUP, "scroll-up" },
 	{ MODEKEYCOPY_SEARCHAGAIN, "search-again" },
 	{ MODEKEYCOPY_SEARCHDOWN, "search-forward" },
 	{ MODEKEYCOPY_SEARCHREVERSE, "search-reverse" },
 	{ MODEKEYCOPY_SEARCHUP, "search-backward" },
 	{ MODEKEYCOPY_STARTNUMBERPREFIX, "start-number-prefix" },
 	{ MODEKEYCOPY_STARTOFLINE, "start-of-line" },
 	{ MODEKEYCOPY_STARTSELECTION, "begin-selection" },
 	{ MODEKEYCOPY_TOPLINE, "top-line" },
 	{ MODEKEYCOPY_UP, "cursor-up" },

 	{ 0, NULL }
 };

 /* vi editing keys. */
 const struct mode_key_entry mode_key_vi_edit[] = {
 	{ '\003' /* C-c */,	0, MODEKEYEDIT_CANCEL },
 	{ '\010' /* C-h */, 	0, MODEKEYEDIT_BACKSPACE },
 	{ '\011' /* Tab */,	0, MODEKEYEDIT_COMPLETE },
 	{ '\033' /* Escape */,	0, MODEKEYEDIT_SWITCHMODE },
 	{ '\r',			0, MODEKEYEDIT_ENTER },
 	{ KEYC_BSPACE,		0, MODEKEYEDIT_BACKSPACE },
 	{ KEYC_DC,		0, MODEKEYEDIT_DELETE },

 	{ '$',			1, MODEKEYEDIT_ENDOFLINE },
 	{ '0',			1, MODEKEYEDIT_STARTOFLINE },
 	{ 'D',			1, MODEKEYEDIT_DELETETOENDOFLINE },
 	{ '\003' /* C-c */,	1, MODEKEYEDIT_CANCEL },
 	{ '\010' /* C-h */, 	1, MODEKEYEDIT_BACKSPACE },
 	{ '\r',			1, MODEKEYEDIT_ENTER },
 	{ '^',			1, MODEKEYEDIT_STARTOFLINE },
 	{ 'a',			1, MODEKEYEDIT_SWITCHMODEAPPEND },
 	{ 'd',			1, MODEKEYEDIT_DELETELINE },
 	{ 'h',			1, MODEKEYEDIT_CURSORLEFT },
 	{ 'i',			1, MODEKEYEDIT_SWITCHMODE },
 	{ 'j',			1, MODEKEYEDIT_HISTORYDOWN },
 	{ 'k',			1, MODEKEYEDIT_HISTORYUP },
 	{ 'l',			1, MODEKEYEDIT_CURSORRIGHT },
 	{ 'p',			1, MODEKEYEDIT_PASTE },
 	{ KEYC_BSPACE,		1, MODEKEYEDIT_BACKSPACE },
 	{ KEYC_DC,		1, MODEKEYEDIT_DELETE },
 	{ KEYC_DOWN,		1, MODEKEYEDIT_HISTORYDOWN },
 	{ KEYC_LEFT,		1, MODEKEYEDIT_CURSORLEFT },
 	{ KEYC_RIGHT,		1, MODEKEYEDIT_CURSORRIGHT },
 	{ KEYC_UP,		1, MODEKEYEDIT_HISTORYUP },

 	{ 0,		       -1, 0 }
 };
 struct mode_key_tree mode_key_tree_vi_edit;

 /* vi choice selection keys. */
 const struct mode_key_entry mode_key_vi_choice[] = {
 	{ '\002' /* C-b */,     0, MODEKEYCHOICE_PAGEUP },
 	{ '\003' /* C-c */,	0, MODEKEYCHOICE_CANCEL },
 	{ '\005' /* C-e */,     0, MODEKEYCHOICE_SCROLLDOWN },
 	{ '\006' /* C-f */,     0, MODEKEYCHOICE_PAGEDOWN },
 	{ '\031' /* C-y */,     0, MODEKEYCHOICE_SCROLLUP },
 	{ '\r',			0, MODEKEYCHOICE_CHOOSE },
 	{ 'j',			0, MODEKEYCHOICE_DOWN },
 	{ 'k',			0, MODEKEYCHOICE_UP },
 	{ 'q',			0, MODEKEYCHOICE_CANCEL },
 	{ KEYC_DOWN | KEYC_CTRL,0, MODEKEYCHOICE_SCROLLDOWN },
 	{ KEYC_DOWN,		0, MODEKEYCHOICE_DOWN },
 	{ KEYC_NPAGE,		0, MODEKEYCHOICE_PAGEDOWN },
 	{ KEYC_PPAGE,		0, MODEKEYCHOICE_PAGEUP },
 	{ KEYC_UP | KEYC_CTRL,	0, MODEKEYCHOICE_SCROLLUP },
 	{ KEYC_UP,		0, MODEKEYCHOICE_UP },

 	{ 0,			-1, 0 }
 };
 struct mode_key_tree mode_key_tree_vi_choice;

 /* vi copy mode keys. */
 const struct mode_key_entry mode_key_vi_copy[] = {
 	{ ' ',			0, MODEKEYCOPY_STARTSELECTION },
 	{ '$',			0, MODEKEYCOPY_ENDOFLINE },
 	{ '/',			0, MODEKEYCOPY_SEARCHDOWN },
 	{ '0',			0, MODEKEYCOPY_STARTOFLINE },
 	{ '1',			0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '2',			0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '3',			0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '4',			0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '5',			0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '6',			0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '7',			0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '8',			0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '9',			0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ ':',			0, MODEKEYCOPY_GOTOLINE },
 	{ '?',			0, MODEKEYCOPY_SEARCHUP },
 	{ 'B',			0, MODEKEYCOPY_PREVIOUSSPACE },
 	{ 'E',			0, MODEKEYCOPY_NEXTSPACEEND },
 	{ 'G',			0, MODEKEYCOPY_HISTORYBOTTOM },
 	{ 'H',			0, MODEKEYCOPY_TOPLINE },
 	{ 'J',			0, MODEKEYCOPY_SCROLLDOWN },
 	{ 'K',			0, MODEKEYCOPY_SCROLLUP },
 	{ 'L',			0, MODEKEYCOPY_BOTTOMLINE },
 	{ 'M',			0, MODEKEYCOPY_MIDDLELINE },
 	{ 'N',			0, MODEKEYCOPY_SEARCHREVERSE },
 	{ 'W',			0, MODEKEYCOPY_NEXTSPACE },
 	{ '\002' /* C-b */,	0, MODEKEYCOPY_PREVIOUSPAGE },
 	{ '\003' /* C-c */,	0, MODEKEYCOPY_CANCEL },
 	{ '\004' /* C-d */,	0, MODEKEYCOPY_HALFPAGEDOWN },
 	{ '\005' /* C-e */,	0, MODEKEYCOPY_SCROLLDOWN },
 	{ '\006' /* C-f */,	0, MODEKEYCOPY_NEXTPAGE },
 	{ '\010' /* C-h */,	0, MODEKEYCOPY_LEFT },
 	{ '\025' /* C-u */,	0, MODEKEYCOPY_HALFPAGEUP },
 	{ '\031' /* C-y */,	0, MODEKEYCOPY_SCROLLUP },
 	{ '\033' /* Escape */,	0, MODEKEYCOPY_CLEARSELECTION },
 	{ '\r',			0, MODEKEYCOPY_COPYSELECTION },
 	{ '^',			0, MODEKEYCOPY_BACKTOINDENTATION },
 	{ 'b',			0, MODEKEYCOPY_PREVIOUSWORD },
 	{ 'e',                  0, MODEKEYCOPY_NEXTWORDEND },
 	{ 'g',			0, MODEKEYCOPY_HISTORYTOP },
 	{ 'h',			0, MODEKEYCOPY_LEFT },
 	{ 'j',			0, MODEKEYCOPY_DOWN },
 	{ 'k',			0, MODEKEYCOPY_UP },
 	{ 'l',			0, MODEKEYCOPY_RIGHT },
 	{ 'n',			0, MODEKEYCOPY_SEARCHAGAIN },
 	{ 'q',			0, MODEKEYCOPY_CANCEL },
 	{ 'v',			0, MODEKEYCOPY_RECTANGLETOGGLE },
 	{ 'w',			0, MODEKEYCOPY_NEXTWORD },
 	{ KEYC_BSPACE,		0, MODEKEYCOPY_LEFT },
 	{ KEYC_DOWN | KEYC_CTRL,0, MODEKEYCOPY_SCROLLDOWN },
 	{ KEYC_DOWN,		0, MODEKEYCOPY_DOWN },
 	{ KEYC_LEFT,		0, MODEKEYCOPY_LEFT },
 	{ KEYC_NPAGE,		0, MODEKEYCOPY_NEXTPAGE },
 	{ KEYC_PPAGE,		0, MODEKEYCOPY_PREVIOUSPAGE },
 	{ KEYC_RIGHT,		0, MODEKEYCOPY_RIGHT },
 	{ KEYC_UP | KEYC_CTRL,	0, MODEKEYCOPY_SCROLLUP },
 	{ KEYC_UP,		0, MODEKEYCOPY_UP },

 	{ 0,			-1, 0 }
 };
 struct mode_key_tree mode_key_tree_vi_copy;

 /* emacs editing keys. */
 const struct mode_key_entry mode_key_emacs_edit[] = {
 	{ '\001' /* C-a */,	0, MODEKEYEDIT_STARTOFLINE },
 	{ '\002' /* C-b */,	0, MODEKEYEDIT_CURSORLEFT },
 	{ '\003' /* C-c */,	0, MODEKEYEDIT_CANCEL },
 	{ '\004' /* C-d */,	0, MODEKEYEDIT_DELETE },
 	{ '\005' /* C-e	*/,	0, MODEKEYEDIT_ENDOFLINE },
 	{ '\006' /* C-f */,	0, MODEKEYEDIT_CURSORRIGHT },
 	{ '\010' /* C-H */, 	0, MODEKEYEDIT_BACKSPACE },
 	{ '\011' /* Tab */,     0, MODEKEYEDIT_COMPLETE },
 	{ '\013' /* C-k	*/,	0, MODEKEYEDIT_DELETETOENDOFLINE },
 	{ '\016' /* C-n */,	0, MODEKEYEDIT_HISTORYDOWN },
 	{ '\020' /* C-p */,	0, MODEKEYEDIT_HISTORYUP },
 	{ '\024' /* C-t */,	0, MODEKEYEDIT_TRANSPOSECHARS },
 	{ '\025' /* C-u	*/,	0, MODEKEYEDIT_DELETELINE },
 	{ '\031' /* C-y */,	0, MODEKEYEDIT_PASTE },
 	{ '\033' /* Escape */,	0, MODEKEYEDIT_CANCEL },
 	{ '\r',			0, MODEKEYEDIT_ENTER },
 	{ 'm' | KEYC_ESCAPE,	0, MODEKEYEDIT_STARTOFLINE },
 	{ KEYC_BSPACE,		0, MODEKEYEDIT_BACKSPACE },
 	{ KEYC_DC,		0, MODEKEYEDIT_DELETE },
 	{ KEYC_DOWN,		0, MODEKEYEDIT_HISTORYDOWN },
 	{ KEYC_LEFT,		0, MODEKEYEDIT_CURSORLEFT },
 	{ KEYC_RIGHT,		0, MODEKEYEDIT_CURSORRIGHT },
 	{ KEYC_UP,		0, MODEKEYEDIT_HISTORYUP },

 	{ 0,		       -1, 0 }
 };
 struct mode_key_tree mode_key_tree_emacs_edit;

 /* emacs choice selection keys. */
 const struct mode_key_entry mode_key_emacs_choice[] = {
 	{ '\003' /* C-c */,	0, MODEKEYCHOICE_CANCEL },
 	{ '\016' /* C-n */,	0, MODEKEYCHOICE_DOWN },
 	{ '\020' /* C-p */,	0, MODEKEYCHOICE_UP },
 	{ '\026' /* C-v */,	0, MODEKEYCHOICE_PAGEDOWN },
 	{ '\033' /* Escape */,	0, MODEKEYCHOICE_CANCEL },
 	{ '\r',			0, MODEKEYCHOICE_CHOOSE },
 	{ 'q',			0, MODEKEYCHOICE_CANCEL },
 	{ 'v' | KEYC_ESCAPE,	0, MODEKEYCHOICE_PAGEUP },
 	{ KEYC_DOWN | KEYC_CTRL,0, MODEKEYCHOICE_SCROLLDOWN },
 	{ KEYC_DOWN,		0, MODEKEYCHOICE_DOWN },
 	{ KEYC_NPAGE,		0, MODEKEYCHOICE_PAGEDOWN },
 	{ KEYC_PPAGE,		0, MODEKEYCHOICE_PAGEUP },
 	{ KEYC_UP | KEYC_CTRL,	0, MODEKEYCHOICE_SCROLLUP },
 	{ KEYC_UP,		0, MODEKEYCHOICE_UP },

 	{ 0,			-1, 0 }
 };
 struct mode_key_tree mode_key_tree_emacs_choice;

 /* emacs copy mode keys. */
 const struct mode_key_entry mode_key_emacs_copy[] = {
 	{ ' ',			0, MODEKEYCOPY_NEXTPAGE },
 	{ '1' | KEYC_ESCAPE,	0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '2' | KEYC_ESCAPE,	0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '3' | KEYC_ESCAPE,	0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '4' | KEYC_ESCAPE,	0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '5' | KEYC_ESCAPE,	0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '6' | KEYC_ESCAPE,	0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '7' | KEYC_ESCAPE,	0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '8' | KEYC_ESCAPE,	0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '9' | KEYC_ESCAPE,	0, MODEKEYCOPY_STARTNUMBERPREFIX },
 	{ '<' | KEYC_ESCAPE,    0, MODEKEYCOPY_HISTORYTOP },
 	{ '>' | KEYC_ESCAPE,    0, MODEKEYCOPY_HISTORYBOTTOM },
 	{ 'R' | KEYC_ESCAPE,	0, MODEKEYCOPY_TOPLINE },
 	{ 'R',			0, MODEKEYCOPY_RECTANGLETOGGLE },
 	{ '\000' /* C-Space */,	0, MODEKEYCOPY_STARTSELECTION },
 	{ '\001' /* C-a */,	0, MODEKEYCOPY_STARTOFLINE },
 	{ '\002' /* C-b */,	0, MODEKEYCOPY_LEFT },
 	{ '\003' /* C-c */,	0, MODEKEYCOPY_CANCEL },
 	{ '\005' /* C-e */,	0, MODEKEYCOPY_ENDOFLINE },
 	{ '\006' /* C-f */,	0, MODEKEYCOPY_RIGHT },
 	{ '\007' /* C-g */,	0, MODEKEYCOPY_CLEARSELECTION },
 	{ '\016' /* C-n */,	0, MODEKEYCOPY_DOWN },
 	{ '\020' /* C-p */,	0, MODEKEYCOPY_UP },
 	{ '\022' /* C-r */,	0, MODEKEYCOPY_SEARCHUP },
 	{ '\023' /* C-s */,	0, MODEKEYCOPY_SEARCHDOWN },
 	{ '\026' /* C-v */,	0, MODEKEYCOPY_NEXTPAGE },
 	{ '\027' /* C-w */,	0, MODEKEYCOPY_COPYSELECTION },
 	{ '\033' /* Escape */,	0, MODEKEYCOPY_CANCEL },
 	{ 'N',			0, MODEKEYCOPY_SEARCHREVERSE },
 	{ 'b' | KEYC_ESCAPE,	0, MODEKEYCOPY_PREVIOUSWORD },
 	{ 'f' | KEYC_ESCAPE,	0, MODEKEYCOPY_NEXTWORDEND },
 	{ 'g',			0, MODEKEYCOPY_GOTOLINE },
 	{ 'm' | KEYC_ESCAPE,	0, MODEKEYCOPY_BACKTOINDENTATION },
 	{ 'n',			0, MODEKEYCOPY_SEARCHAGAIN },
 	{ 'q',			0, MODEKEYCOPY_CANCEL },
 	{ 'r' | KEYC_ESCAPE,	0, MODEKEYCOPY_MIDDLELINE },
 	{ 'v' | KEYC_ESCAPE,	0, MODEKEYCOPY_PREVIOUSPAGE },
 	{ 'w' | KEYC_ESCAPE,	0, MODEKEYCOPY_COPYSELECTION },
 	{ KEYC_DOWN | KEYC_CTRL,0, MODEKEYCOPY_SCROLLDOWN },
 	{ KEYC_DOWN | KEYC_ESCAPE, 0, MODEKEYCOPY_HALFPAGEDOWN },
 	{ KEYC_DOWN,		0, MODEKEYCOPY_DOWN },
 	{ KEYC_LEFT,		0, MODEKEYCOPY_LEFT },
 	{ KEYC_NPAGE,		0, MODEKEYCOPY_NEXTPAGE },
 	{ KEYC_PPAGE,		0, MODEKEYCOPY_PREVIOUSPAGE },
 	{ KEYC_RIGHT,		0, MODEKEYCOPY_RIGHT },
 	{ KEYC_UP | KEYC_CTRL,	0, MODEKEYCOPY_SCROLLUP },
 	{ KEYC_UP | KEYC_ESCAPE, 0, MODEKEYCOPY_HALFPAGEUP },
 	{ KEYC_UP,		0, MODEKEYCOPY_UP },

 	{ 0,			-1, 0 }
 };
 struct mode_key_tree mode_key_tree_emacs_copy;

 /* Table mapping key table names to default settings and trees. */
 const struct mode_key_table mode_key_tables[] = {
 	{ "vi-edit", mode_key_cmdstr_edit,
 	  &mode_key_tree_vi_edit, mode_key_vi_edit },
 	{ "vi-choice", mode_key_cmdstr_choice,
 	  &mode_key_tree_vi_choice, mode_key_vi_choice },
 	{ "vi-copy", mode_key_cmdstr_copy,
 	  &mode_key_tree_vi_copy, mode_key_vi_copy },
 	{ "emacs-edit", mode_key_cmdstr_edit,
 	  &mode_key_tree_emacs_edit, mode_key_emacs_edit },
 	{ "emacs-choice", mode_key_cmdstr_choice,
 	  &mode_key_tree_emacs_choice, mode_key_emacs_choice },
 	{ "emacs-copy", mode_key_cmdstr_copy,
 	  &mode_key_tree_emacs_copy, mode_key_emacs_copy },

 	{ NULL, NULL, NULL, NULL }
 };

 SPLAY_GENERATE(mode_key_tree, mode_key_binding, entry, mode_key_cmp);

 int
 mode_key_cmp(struct mode_key_binding *mbind1, struct mode_key_binding *mbind2)
 {
 	if (mbind1->mode != mbind2->mode)
 		return (mbind1->mode - mbind2->mode);
 	return (mbind1->key - mbind2->key);
 }

 const char *
 mode_key_tostring(struct mode_key_cmdstr *cmdstr, enum mode_key_cmd cmd)
 {
 	for (; cmdstr->name != NULL; cmdstr++) {
 		if (cmdstr->cmd == cmd)
 			return (cmdstr->name);
 	}
 	return (NULL);
 }

 enum mode_key_cmd
 mode_key_fromstring(struct mode_key_cmdstr *cmdstr, const char *name)
 {
 	for (; cmdstr->name != NULL; cmdstr++) {
 		if (strcasecmp(cmdstr->name, name) == 0)
 			return (cmdstr->cmd);
 	}
 	return (MODEKEY_NONE);
 }

 const struct mode_key_table *
 mode_key_findtable(const char *name)
 {
 	const struct mode_key_table	*mtab;

 	for (mtab = mode_key_tables; mtab->name != NULL; mtab++) {
 		if (strcasecmp(name, mtab->name) == 0)
 			return (mtab);
 	}
 	return (NULL);
 }

 void
 mode_key_init_trees(void)
 {
 	const struct mode_key_table	*mtab;
 	const struct mode_key_entry	*ment;
 	struct mode_key_binding		*mbind;

 	for (mtab = mode_key_tables; mtab->name != NULL; mtab++) {
 		SPLAY_INIT(mtab->tree);
 		for (ment = mtab->table; ment->mode != -1; ment++) {
 			mbind = xmalloc(sizeof *mbind);
 			mbind->key = ment->key;
 			mbind->mode = ment->mode;
 			mbind->cmd = ment->cmd;
 			SPLAY_INSERT(mode_key_tree, mtab->tree, mbind);
 		}
 	}
 }

 void
 mode_key_init(struct mode_key_data *mdata, struct mode_key_tree *mtree)
 {
 	mdata->tree = mtree;
 	mdata->mode = 0;
 }

 enum mode_key_cmd
 mode_key_lookup(struct mode_key_data *mdata, int key)
 {
 	struct mode_key_binding	*mbind, mtmp;

 	mtmp.key = key;
 	mtmp.mode = mdata->mode;
 	if ((mbind = SPLAY_FIND(mode_key_tree, mdata->tree, &mtmp)) == NULL) {
 		if (mdata->mode != 0)
 			return (MODEKEY_NONE);
 		return (MODEKEY_OTHER);
 	}

 	switch (mbind->cmd) {
 	case MODEKEYEDIT_SWITCHMODE:
 	case MODEKEYEDIT_SWITCHMODEAPPEND:
 		mdata->mode = 1 - mdata->mode;
 		/* FALLTHROUGH */
 	default:
 		return (mbind->cmd);
 	}
 }
	/* $OpenBSD$ */

	/*
	* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
	*
	* Permission to use, copy, modify, and distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
	* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
	* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#include <sys/types.h>

	#include <string.h>

	#include "tmux.h"

	/*
	* Mode keys. These are the key bindings used when editing (status prompt), and
	* in the modes. They are split into two sets of three tables, one set of three
	* for vi and the other for emacs key bindings. The three tables are for
	* editing, for menu-like modes (choice, more), and for copy modes (copy,
	* scroll).
	*
	* The fixed tables of struct mode_key_entry below are the defaults: they are
	* built into a tree of struct mode_key_binding by mode_key_init_trees, which
	* can then be modified.
	*
	* vi command mode is handled by having a mode flag in the struct which allows
	* two sets of bindings to be swapped between. A couple of editing commands
	* (MODEKEYEDIT_SWITCHMODE and MODEKEYEDIT_SWITCHMODEAPPEND) are special-cased
	* to do this.
	*/

	/* Edit keys command strings. */
	struct mode_key_cmdstr mode_key_cmdstr_edit[] = {
	{ MODEKEYEDIT_BACKSPACE, "backspace" },
	{ MODEKEYEDIT_CANCEL, "cancel" },
	{ MODEKEYEDIT_COMPLETE, "complete" },
	{ MODEKEYEDIT_CURSORLEFT, "cursor-left" },
	{ MODEKEYEDIT_CURSORRIGHT, "cursor-right" },
	{ MODEKEYEDIT_DELETE, "delete" },
	{ MODEKEYEDIT_DELETELINE, "delete-line" },
	{ MODEKEYEDIT_DELETETOENDOFLINE, "delete-end-of-line" },
	{ MODEKEYEDIT_ENDOFLINE, "end-of-line" },
	{ MODEKEYEDIT_ENTER, "enter" },
	{ MODEKEYEDIT_HISTORYDOWN, "history-down" },
	{ MODEKEYEDIT_HISTORYUP, "history-up" },
	{ MODEKEYEDIT_PASTE, "paste" },
	{ MODEKEYEDIT_STARTOFLINE, "start-of-line" },
	{ MODEKEYEDIT_SWITCHMODE, "switch-mode" },
	{ MODEKEYEDIT_SWITCHMODEAPPEND, "switch-mode-append" },
	{ MODEKEYEDIT_TRANSPOSECHARS, "transpose-chars" },

	{ 0, NULL }
	};

	/* Choice keys command strings. */
	struct mode_key_cmdstr mode_key_cmdstr_choice[] = {
	{ MODEKEYCHOICE_CANCEL, "cancel" },
	{ MODEKEYCHOICE_CHOOSE, "choose" },
	{ MODEKEYCHOICE_DOWN, "down" },
	{ MODEKEYCHOICE_PAGEDOWN, "page-down" },
	{ MODEKEYCHOICE_PAGEUP, "page-up" },
	{ MODEKEYCHOICE_SCROLLDOWN, "scroll-down" },
	{ MODEKEYCHOICE_SCROLLUP, "scroll-up" },
	{ MODEKEYCHOICE_UP, "up" },

	{ 0, NULL }
	};

	/* Copy keys command strings. */
	struct mode_key_cmdstr mode_key_cmdstr_copy[] = {
	{ MODEKEYCOPY_BACKTOINDENTATION, "back-to-indentation" },
	{ MODEKEYCOPY_BOTTOMLINE, "bottom-line" },
	{ MODEKEYCOPY_CANCEL, "cancel" },
	{ MODEKEYCOPY_CLEARSELECTION, "clear-selection" },
	{ MODEKEYCOPY_COPYSELECTION, "copy-selection" },
	{ MODEKEYCOPY_DOWN, "cursor-down" },
	{ MODEKEYCOPY_ENDOFLINE, "end-of-line" },
	{ MODEKEYCOPY_GOTOLINE, "goto-line" },
	{ MODEKEYCOPY_HISTORYBOTTOM, "history-bottom" },
	{ MODEKEYCOPY_HISTORYTOP, "history-top" },
	{ MODEKEYCOPY_LEFT, "cursor-left" },
	{ MODEKEYCOPY_RECTANGLETOGGLE, "rectangle-toggle" },
	{ MODEKEYCOPY_MIDDLELINE, "middle-line" },
	{ MODEKEYCOPY_NEXTPAGE, "page-down" },
	{ MODEKEYCOPY_NEXTSPACE, "next-space" },
	{ MODEKEYCOPY_NEXTSPACEEND, "next-space-end" },
	{ MODEKEYCOPY_NEXTWORD, "next-word" },
	{ MODEKEYCOPY_NEXTWORDEND, "next-word-end" },
	{ MODEKEYCOPY_PREVIOUSPAGE, "page-up" },
	{ MODEKEYCOPY_PREVIOUSSPACE, "previous-space" },
	{ MODEKEYCOPY_PREVIOUSWORD, "previous-word" },
	{ MODEKEYCOPY_RIGHT, "cursor-right" },
	{ MODEKEYCOPY_SCROLLDOWN, "scroll-down" },
	{ MODEKEYCOPY_SCROLLUP, "scroll-up" },
	{ MODEKEYCOPY_SEARCHAGAIN, "search-again" },
	{ MODEKEYCOPY_SEARCHDOWN, "search-forward" },
	{ MODEKEYCOPY_SEARCHREVERSE, "search-reverse" },
	{ MODEKEYCOPY_SEARCHUP, "search-backward" },
	{ MODEKEYCOPY_STARTNUMBERPREFIX, "start-number-prefix" },
	{ MODEKEYCOPY_STARTOFLINE, "start-of-line" },
	{ MODEKEYCOPY_STARTSELECTION, "begin-selection" },
	{ MODEKEYCOPY_TOPLINE, "top-line" },
	{ MODEKEYCOPY_UP, "cursor-up" },

	{ 0, NULL }
	};

	/* vi editing keys. */
	const struct mode_key_entry mode_key_vi_edit[] = {
	{ '\003' /* C-c */, 0, MODEKEYEDIT_CANCEL },
	{ '\010' /* C-h */, 0, MODEKEYEDIT_BACKSPACE },
	{ '\011' /* Tab */, 0, MODEKEYEDIT_COMPLETE },
	{ '\033' /* Escape */, 0, MODEKEYEDIT_SWITCHMODE },
	{ '\r', 0, MODEKEYEDIT_ENTER },
	{ KEYC_BSPACE, 0, MODEKEYEDIT_BACKSPACE },
	{ KEYC_DC, 0, MODEKEYEDIT_DELETE },

	{ '$', 1, MODEKEYEDIT_ENDOFLINE },
	{ '0', 1, MODEKEYEDIT_STARTOFLINE },
	{ 'D', 1, MODEKEYEDIT_DELETETOENDOFLINE },
	{ '\003' /* C-c */, 1, MODEKEYEDIT_CANCEL },
	{ '\010' /* C-h */, 1, MODEKEYEDIT_BACKSPACE },
	{ '\r', 1, MODEKEYEDIT_ENTER },
	{ '^', 1, MODEKEYEDIT_STARTOFLINE },
	{ 'a', 1, MODEKEYEDIT_SWITCHMODEAPPEND },
	{ 'd', 1, MODEKEYEDIT_DELETELINE },
	{ 'h', 1, MODEKEYEDIT_CURSORLEFT },
	{ 'i', 1, MODEKEYEDIT_SWITCHMODE },
	{ 'j', 1, MODEKEYEDIT_HISTORYDOWN },
	{ 'k', 1, MODEKEYEDIT_HISTORYUP },
	{ 'l', 1, MODEKEYEDIT_CURSORRIGHT },
	{ 'p', 1, MODEKEYEDIT_PASTE },
	{ KEYC_BSPACE, 1, MODEKEYEDIT_BACKSPACE },
	{ KEYC_DC, 1, MODEKEYEDIT_DELETE },
	{ KEYC_DOWN, 1, MODEKEYEDIT_HISTORYDOWN },
	{ KEYC_LEFT, 1, MODEKEYEDIT_CURSORLEFT },
	{ KEYC_RIGHT, 1, MODEKEYEDIT_CURSORRIGHT },
	{ KEYC_UP, 1, MODEKEYEDIT_HISTORYUP },

	{ 0, -1, 0 }
	};
	struct mode_key_tree mode_key_tree_vi_edit;

	/* vi choice selection keys. */
	const struct mode_key_entry mode_key_vi_choice[] = {
	{ '\002' /* C-b */, 0, MODEKEYCHOICE_PAGEUP },
	{ '\003' /* C-c */, 0, MODEKEYCHOICE_CANCEL },
	{ '\005' /* C-e */, 0, MODEKEYCHOICE_SCROLLDOWN },
	{ '\006' /* C-f */, 0, MODEKEYCHOICE_PAGEDOWN },
	{ '\031' /* C-y */, 0, MODEKEYCHOICE_SCROLLUP },
	{ '\r', 0, MODEKEYCHOICE_CHOOSE },
	{ 'j', 0, MODEKEYCHOICE_DOWN },
	{ 'k', 0, MODEKEYCHOICE_UP },
	{ 'q', 0, MODEKEYCHOICE_CANCEL },
	{ KEYC_DOWN \| KEYC_CTRL,0, MODEKEYCHOICE_SCROLLDOWN },
	{ KEYC_DOWN, 0, MODEKEYCHOICE_DOWN },
	{ KEYC_NPAGE, 0, MODEKEYCHOICE_PAGEDOWN },
	{ KEYC_PPAGE, 0, MODEKEYCHOICE_PAGEUP },
	{ KEYC_UP \| KEYC_CTRL, 0, MODEKEYCHOICE_SCROLLUP },
	{ KEYC_UP, 0, MODEKEYCHOICE_UP },

	{ 0, -1, 0 }
	};
	struct mode_key_tree mode_key_tree_vi_choice;

	/* vi copy mode keys. */
	const struct mode_key_entry mode_key_vi_copy[] = {
	{ ' ', 0, MODEKEYCOPY_STARTSELECTION },
	{ '$', 0, MODEKEYCOPY_ENDOFLINE },
	{ '/', 0, MODEKEYCOPY_SEARCHDOWN },
	{ '0', 0, MODEKEYCOPY_STARTOFLINE },
	{ '1', 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '2', 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '3', 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '4', 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '5', 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '6', 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '7', 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '8', 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '9', 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ ':', 0, MODEKEYCOPY_GOTOLINE },
	{ '?', 0, MODEKEYCOPY_SEARCHUP },
	{ 'B', 0, MODEKEYCOPY_PREVIOUSSPACE },
	{ 'E', 0, MODEKEYCOPY_NEXTSPACEEND },
	{ 'G', 0, MODEKEYCOPY_HISTORYBOTTOM },
	{ 'H', 0, MODEKEYCOPY_TOPLINE },
	{ 'J', 0, MODEKEYCOPY_SCROLLDOWN },
	{ 'K', 0, MODEKEYCOPY_SCROLLUP },
	{ 'L', 0, MODEKEYCOPY_BOTTOMLINE },
	{ 'M', 0, MODEKEYCOPY_MIDDLELINE },
	{ 'N', 0, MODEKEYCOPY_SEARCHREVERSE },
	{ 'W', 0, MODEKEYCOPY_NEXTSPACE },
	{ '\002' /* C-b */, 0, MODEKEYCOPY_PREVIOUSPAGE },
	{ '\003' /* C-c */, 0, MODEKEYCOPY_CANCEL },
	{ '\004' /* C-d */, 0, MODEKEYCOPY_HALFPAGEDOWN },
	{ '\005' /* C-e */, 0, MODEKEYCOPY_SCROLLDOWN },
	{ '\006' /* C-f */, 0, MODEKEYCOPY_NEXTPAGE },
	{ '\010' /* C-h */, 0, MODEKEYCOPY_LEFT },
	{ '\025' /* C-u */, 0, MODEKEYCOPY_HALFPAGEUP },
	{ '\031' /* C-y */, 0, MODEKEYCOPY_SCROLLUP },
	{ '\033' /* Escape */, 0, MODEKEYCOPY_CLEARSELECTION },
	{ '\r', 0, MODEKEYCOPY_COPYSELECTION },
	{ '^', 0, MODEKEYCOPY_BACKTOINDENTATION },
	{ 'b', 0, MODEKEYCOPY_PREVIOUSWORD },
	{ 'e', 0, MODEKEYCOPY_NEXTWORDEND },
	{ 'g', 0, MODEKEYCOPY_HISTORYTOP },
	{ 'h', 0, MODEKEYCOPY_LEFT },
	{ 'j', 0, MODEKEYCOPY_DOWN },
	{ 'k', 0, MODEKEYCOPY_UP },
	{ 'l', 0, MODEKEYCOPY_RIGHT },
	{ 'n', 0, MODEKEYCOPY_SEARCHAGAIN },
	{ 'q', 0, MODEKEYCOPY_CANCEL },
	{ 'v', 0, MODEKEYCOPY_RECTANGLETOGGLE },
	{ 'w', 0, MODEKEYCOPY_NEXTWORD },
	{ KEYC_BSPACE, 0, MODEKEYCOPY_LEFT },
	{ KEYC_DOWN \| KEYC_CTRL,0, MODEKEYCOPY_SCROLLDOWN },
	{ KEYC_DOWN, 0, MODEKEYCOPY_DOWN },
	{ KEYC_LEFT, 0, MODEKEYCOPY_LEFT },
	{ KEYC_NPAGE, 0, MODEKEYCOPY_NEXTPAGE },
	{ KEYC_PPAGE, 0, MODEKEYCOPY_PREVIOUSPAGE },
	{ KEYC_RIGHT, 0, MODEKEYCOPY_RIGHT },
	{ KEYC_UP \| KEYC_CTRL, 0, MODEKEYCOPY_SCROLLUP },
	{ KEYC_UP, 0, MODEKEYCOPY_UP },

	{ 0, -1, 0 }
	};
	struct mode_key_tree mode_key_tree_vi_copy;

	/* emacs editing keys. */
	const struct mode_key_entry mode_key_emacs_edit[] = {
	{ '\001' /* C-a */, 0, MODEKEYEDIT_STARTOFLINE },
	{ '\002' /* C-b */, 0, MODEKEYEDIT_CURSORLEFT },
	{ '\003' /* C-c */, 0, MODEKEYEDIT_CANCEL },
	{ '\004' /* C-d */, 0, MODEKEYEDIT_DELETE },
	{ '\005' /* C-e */, 0, MODEKEYEDIT_ENDOFLINE },
	{ '\006' /* C-f */, 0, MODEKEYEDIT_CURSORRIGHT },
	{ '\010' /* C-H */, 0, MODEKEYEDIT_BACKSPACE },
	{ '\011' /* Tab */, 0, MODEKEYEDIT_COMPLETE },
	{ '\013' /* C-k */, 0, MODEKEYEDIT_DELETETOENDOFLINE },
	{ '\016' /* C-n */, 0, MODEKEYEDIT_HISTORYDOWN },
	{ '\020' /* C-p */, 0, MODEKEYEDIT_HISTORYUP },
	{ '\024' /* C-t */, 0, MODEKEYEDIT_TRANSPOSECHARS },
	{ '\025' /* C-u */, 0, MODEKEYEDIT_DELETELINE },
	{ '\031' /* C-y */, 0, MODEKEYEDIT_PASTE },
	{ '\033' /* Escape */, 0, MODEKEYEDIT_CANCEL },
	{ '\r', 0, MODEKEYEDIT_ENTER },
	{ 'm' \| KEYC_ESCAPE, 0, MODEKEYEDIT_STARTOFLINE },
	{ KEYC_BSPACE, 0, MODEKEYEDIT_BACKSPACE },
	{ KEYC_DC, 0, MODEKEYEDIT_DELETE },
	{ KEYC_DOWN, 0, MODEKEYEDIT_HISTORYDOWN },
	{ KEYC_LEFT, 0, MODEKEYEDIT_CURSORLEFT },
	{ KEYC_RIGHT, 0, MODEKEYEDIT_CURSORRIGHT },
	{ KEYC_UP, 0, MODEKEYEDIT_HISTORYUP },

	{ 0, -1, 0 }
	};
	struct mode_key_tree mode_key_tree_emacs_edit;

	/* emacs choice selection keys. */
	const struct mode_key_entry mode_key_emacs_choice[] = {
	{ '\003' /* C-c */, 0, MODEKEYCHOICE_CANCEL },
	{ '\016' /* C-n */, 0, MODEKEYCHOICE_DOWN },
	{ '\020' /* C-p */, 0, MODEKEYCHOICE_UP },
	{ '\026' /* C-v */, 0, MODEKEYCHOICE_PAGEDOWN },
	{ '\033' /* Escape */, 0, MODEKEYCHOICE_CANCEL },
	{ '\r', 0, MODEKEYCHOICE_CHOOSE },
	{ 'q', 0, MODEKEYCHOICE_CANCEL },
	{ 'v' \| KEYC_ESCAPE, 0, MODEKEYCHOICE_PAGEUP },
	{ KEYC_DOWN \| KEYC_CTRL,0, MODEKEYCHOICE_SCROLLDOWN },
	{ KEYC_DOWN, 0, MODEKEYCHOICE_DOWN },
	{ KEYC_NPAGE, 0, MODEKEYCHOICE_PAGEDOWN },
	{ KEYC_PPAGE, 0, MODEKEYCHOICE_PAGEUP },
	{ KEYC_UP \| KEYC_CTRL, 0, MODEKEYCHOICE_SCROLLUP },
	{ KEYC_UP, 0, MODEKEYCHOICE_UP },

	{ 0, -1, 0 }
	};
	struct mode_key_tree mode_key_tree_emacs_choice;

	/* emacs copy mode keys. */
	const struct mode_key_entry mode_key_emacs_copy[] = {
	{ ' ', 0, MODEKEYCOPY_NEXTPAGE },
	{ '1' \| KEYC_ESCAPE, 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '2' \| KEYC_ESCAPE, 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '3' \| KEYC_ESCAPE, 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '4' \| KEYC_ESCAPE, 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '5' \| KEYC_ESCAPE, 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '6' \| KEYC_ESCAPE, 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '7' \| KEYC_ESCAPE, 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '8' \| KEYC_ESCAPE, 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '9' \| KEYC_ESCAPE, 0, MODEKEYCOPY_STARTNUMBERPREFIX },
	{ '<' \| KEYC_ESCAPE, 0, MODEKEYCOPY_HISTORYTOP },
	{ '>' \| KEYC_ESCAPE, 0, MODEKEYCOPY_HISTORYBOTTOM },
	{ 'R' \| KEYC_ESCAPE, 0, MODEKEYCOPY_TOPLINE },
	{ 'R', 0, MODEKEYCOPY_RECTANGLETOGGLE },
	{ '\000' /* C-Space */, 0, MODEKEYCOPY_STARTSELECTION },
	{ '\001' /* C-a */, 0, MODEKEYCOPY_STARTOFLINE },
	{ '\002' /* C-b */, 0, MODEKEYCOPY_LEFT },
	{ '\003' /* C-c */, 0, MODEKEYCOPY_CANCEL },
	{ '\005' /* C-e */, 0, MODEKEYCOPY_ENDOFLINE },
	{ '\006' /* C-f */, 0, MODEKEYCOPY_RIGHT },
	{ '\007' /* C-g */, 0, MODEKEYCOPY_CLEARSELECTION },
	{ '\016' /* C-n */, 0, MODEKEYCOPY_DOWN },
	{ '\020' /* C-p */, 0, MODEKEYCOPY_UP },
	{ '\022' /* C-r */, 0, MODEKEYCOPY_SEARCHUP },
	{ '\023' /* C-s */, 0, MODEKEYCOPY_SEARCHDOWN },
	{ '\026' /* C-v */, 0, MODEKEYCOPY_NEXTPAGE },
	{ '\027' /* C-w */, 0, MODEKEYCOPY_COPYSELECTION },
	{ '\033' /* Escape */, 0, MODEKEYCOPY_CANCEL },
	{ 'N', 0, MODEKEYCOPY_SEARCHREVERSE },
	{ 'b' \| KEYC_ESCAPE, 0, MODEKEYCOPY_PREVIOUSWORD },
	{ 'f' \| KEYC_ESCAPE, 0, MODEKEYCOPY_NEXTWORDEND },
	{ 'g', 0, MODEKEYCOPY_GOTOLINE },
	{ 'm' \| KEYC_ESCAPE, 0, MODEKEYCOPY_BACKTOINDENTATION },
	{ 'n', 0, MODEKEYCOPY_SEARCHAGAIN },
	{ 'q', 0, MODEKEYCOPY_CANCEL },
	{ 'r' \| KEYC_ESCAPE, 0, MODEKEYCOPY_MIDDLELINE },
	{ 'v' \| KEYC_ESCAPE, 0, MODEKEYCOPY_PREVIOUSPAGE },
	{ 'w' \| KEYC_ESCAPE, 0, MODEKEYCOPY_COPYSELECTION },
	{ KEYC_DOWN \| KEYC_CTRL,0, MODEKEYCOPY_SCROLLDOWN },
	{ KEYC_DOWN \| KEYC_ESCAPE, 0, MODEKEYCOPY_HALFPAGEDOWN },
	{ KEYC_DOWN, 0, MODEKEYCOPY_DOWN },
	{ KEYC_LEFT, 0, MODEKEYCOPY_LEFT },
	{ KEYC_NPAGE, 0, MODEKEYCOPY_NEXTPAGE },
	{ KEYC_PPAGE, 0, MODEKEYCOPY_PREVIOUSPAGE },
	{ KEYC_RIGHT, 0, MODEKEYCOPY_RIGHT },
	{ KEYC_UP \| KEYC_CTRL, 0, MODEKEYCOPY_SCROLLUP },
	{ KEYC_UP \| KEYC_ESCAPE, 0, MODEKEYCOPY_HALFPAGEUP },
	{ KEYC_UP, 0, MODEKEYCOPY_UP },

	{ 0, -1, 0 }
	};
	struct mode_key_tree mode_key_tree_emacs_copy;

	/* Table mapping key table names to default settings and trees. */
	const struct mode_key_table mode_key_tables[] = {
	{ "vi-edit", mode_key_cmdstr_edit,
	&mode_key_tree_vi_edit, mode_key_vi_edit },
	{ "vi-choice", mode_key_cmdstr_choice,
	&mode_key_tree_vi_choice, mode_key_vi_choice },
	{ "vi-copy", mode_key_cmdstr_copy,
	&mode_key_tree_vi_copy, mode_key_vi_copy },
	{ "emacs-edit", mode_key_cmdstr_edit,
	&mode_key_tree_emacs_edit, mode_key_emacs_edit },
	{ "emacs-choice", mode_key_cmdstr_choice,
	&mode_key_tree_emacs_choice, mode_key_emacs_choice },
	{ "emacs-copy", mode_key_cmdstr_copy,
	&mode_key_tree_emacs_copy, mode_key_emacs_copy },

	{ NULL, NULL, NULL, NULL }
	};

	SPLAY_GENERATE(mode_key_tree, mode_key_binding, entry, mode_key_cmp);

	int
	mode_key_cmp(struct mode_key_binding mbind1, struct mode_key_binding mbind2)
	{
	if (mbind1->mode != mbind2->mode)
	return (mbind1->mode - mbind2->mode);
	return (mbind1->key - mbind2->key);
	}

	const char *
	mode_key_tostring(struct mode_key_cmdstr *cmdstr, enum mode_key_cmd cmd)
	{
	for (; cmdstr->name != NULL; cmdstr++) {
	if (cmdstr->cmd == cmd)
	return (cmdstr->name);
	}
	return (NULL);
	}

	enum mode_key_cmd
	mode_key_fromstring(struct mode_key_cmdstr cmdstr, const char name)
	{
	for (; cmdstr->name != NULL; cmdstr++) {
	if (strcasecmp(cmdstr->name, name) == 0)
	return (cmdstr->cmd);
	}
	return (MODEKEY_NONE);
	}

	const struct mode_key_table *
	mode_key_findtable(const char *name)
	{
	const struct mode_key_table *mtab;

	for (mtab = mode_key_tables; mtab->name != NULL; mtab++) {
	if (strcasecmp(name, mtab->name) == 0)
	return (mtab);
	}
	return (NULL);
	}

	void
	mode_key_init_trees(void)
	{
	const struct mode_key_table *mtab;
	const struct mode_key_entry *ment;
	struct mode_key_binding *mbind;

	for (mtab = mode_key_tables; mtab->name != NULL; mtab++) {
	SPLAY_INIT(mtab->tree);
	for (ment = mtab->table; ment->mode != -1; ment++) {
	mbind = xmalloc(sizeof *mbind);
	mbind->key = ment->key;
	mbind->mode = ment->mode;
	mbind->cmd = ment->cmd;
	SPLAY_INSERT(mode_key_tree, mtab->tree, mbind);
	}
	}
	}

	void
	mode_key_init(struct mode_key_data mdata, struct mode_key_tree mtree)
	{
	mdata->tree = mtree;
	mdata->mode = 0;
	}

	enum mode_key_cmd
	mode_key_lookup(struct mode_key_data *mdata, int key)
	{
	struct mode_key_binding *mbind, mtmp;

	mtmp.key = key;
	mtmp.mode = mdata->mode;
	if ((mbind = SPLAY_FIND(mode_key_tree, mdata->tree, &mtmp)) == NULL) {
	if (mdata->mode != 0)
	return (MODEKEY_NONE);
	return (MODEKEY_OTHER);
	}

	switch (mbind->cmd) {
	case MODEKEYEDIT_SWITCHMODE:
	case MODEKEYEDIT_SWITCHMODEAPPEND:
	mdata->mode = 1 - mdata->mode;
	/* FALLTHROUGH */
	default:
	return (mbind->cmd);
	}
	}