/* $OpenBSD: input.c,v 1.172 2020/03/31 06:35:38 nicm Exp $ */ /* * Copyright (c) 2007 Nicholas Marriott * * 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 #include #include #include #include #include #include #include "tmux.h" /* * Based on the description by Paul Williams at: * * https://vt100.net/emu/dec_ansi_parser * * With the following changes: * * - 7-bit only. * * - Support for UTF-8. * * - OSC (but not APC) may be terminated by \007 as well as ST. * * - A state for APC similar to OSC. Some terminals appear to use this to set * the title. * * - A state for the screen \033k...\033\\ sequence to rename a window. This is * pretty stupid but not supporting it is more trouble than it is worth. * * - Special handling for ESC inside a DCS to allow arbitrary byte sequences to * be passed to the underlying terminals. */ /* Input parser cell. */ struct input_cell { struct grid_cell cell; int set; int g0set; /* 1 if ACS */ int g1set; /* 1 if ACS */ }; /* Input parser argument. */ struct input_param { enum { INPUT_MISSING, INPUT_NUMBER, INPUT_STRING } type; union { int num; char *str; }; }; /* Input parser context. */ struct input_ctx { struct window_pane *wp; struct bufferevent *event; struct screen_write_ctx ctx; struct input_cell cell; struct input_cell old_cell; u_int old_cx; u_int old_cy; int old_mode; u_char interm_buf[4]; size_t interm_len; u_char param_buf[64]; size_t param_len; #define INPUT_BUF_START 32 #define INPUT_BUF_LIMIT 1048576 u_char *input_buf; size_t input_len; size_t input_space; enum { INPUT_END_ST, INPUT_END_BEL } input_end; struct input_param param_list[24]; u_int param_list_len; struct utf8_data utf8data; int utf8started; int ch; int last; int flags; #define INPUT_DISCARD 0x1 const struct input_state *state; struct event timer; /* * All input received since we were last in the ground state. Sent to * control clients on connection. */ struct evbuffer *since_ground; }; /* Helper functions. */ struct input_transition; static int input_split(struct input_ctx *); static int input_get(struct input_ctx *, u_int, int, int); static void printflike(2, 3) input_reply(struct input_ctx *, const char *, ...); static void input_set_state(struct input_ctx *, const struct input_transition *); static void input_reset_cell(struct input_ctx *); static void input_osc_4(struct input_ctx *, const char *); static void input_osc_10(struct input_ctx *, const char *); static void input_osc_11(struct input_ctx *, const char *); static void input_osc_52(struct input_ctx *, const char *); static void input_osc_104(struct input_ctx *, const char *); /* Transition entry/exit handlers. */ static void input_clear(struct input_ctx *); static void input_ground(struct input_ctx *); static void input_enter_dcs(struct input_ctx *); static void input_enter_osc(struct input_ctx *); static void input_exit_osc(struct input_ctx *); static void input_enter_apc(struct input_ctx *); static void input_exit_apc(struct input_ctx *); static void input_enter_rename(struct input_ctx *); static void input_exit_rename(struct input_ctx *); /* Input state handlers. */ static int input_print(struct input_ctx *); static int input_intermediate(struct input_ctx *); static int input_parameter(struct input_ctx *); static int input_input(struct input_ctx *); static int input_c0_dispatch(struct input_ctx *); static int input_esc_dispatch(struct input_ctx *); static int input_csi_dispatch(struct input_ctx *); static void input_csi_dispatch_rm(struct input_ctx *); static void input_csi_dispatch_rm_private(struct input_ctx *); static void input_csi_dispatch_sm(struct input_ctx *); static void input_csi_dispatch_sm_private(struct input_ctx *); static void input_csi_dispatch_winops(struct input_ctx *); static void input_csi_dispatch_sgr_256(struct input_ctx *, int, u_int *); static void input_csi_dispatch_sgr_rgb(struct input_ctx *, int, u_int *); static void input_csi_dispatch_sgr(struct input_ctx *); static int input_dcs_dispatch(struct input_ctx *); static int input_top_bit_set(struct input_ctx *); static int input_end_bel(struct input_ctx *); /* Command table comparison function. */ static int input_table_compare(const void *, const void *); /* Command table entry. */ struct input_table_entry { int ch; const char *interm; int type; }; /* Escape commands. */ enum input_esc_type { INPUT_ESC_DECALN, INPUT_ESC_DECKPAM, INPUT_ESC_DECKPNM, INPUT_ESC_DECRC, INPUT_ESC_DECSC, INPUT_ESC_HTS, INPUT_ESC_IND, INPUT_ESC_NEL, INPUT_ESC_RI, INPUT_ESC_RIS, INPUT_ESC_SCSG0_OFF, INPUT_ESC_SCSG0_ON, INPUT_ESC_SCSG1_OFF, INPUT_ESC_SCSG1_ON, INPUT_ESC_ST, }; /* Escape command table. */ static const struct input_table_entry input_esc_table[] = { { '0', "(", INPUT_ESC_SCSG0_ON }, { '0', ")", INPUT_ESC_SCSG1_ON }, { '7', "", INPUT_ESC_DECSC }, { '8', "", INPUT_ESC_DECRC }, { '8', "#", INPUT_ESC_DECALN }, { '=', "", INPUT_ESC_DECKPAM }, { '>', "", INPUT_ESC_DECKPNM }, { 'B', "(", INPUT_ESC_SCSG0_OFF }, { 'B', ")", INPUT_ESC_SCSG1_OFF }, { 'D', "", INPUT_ESC_IND }, { 'E', "", INPUT_ESC_NEL }, { 'H', "", INPUT_ESC_HTS }, { 'M', "", INPUT_ESC_RI }, { '\\', "", INPUT_ESC_ST }, { 'c', "", INPUT_ESC_RIS }, }; /* Control (CSI) commands. */ enum input_csi_type { INPUT_CSI_CBT, INPUT_CSI_CNL, INPUT_CSI_CPL, INPUT_CSI_CUB, INPUT_CSI_CUD, INPUT_CSI_CUF, INPUT_CSI_CUP, INPUT_CSI_CUU, INPUT_CSI_DA, INPUT_CSI_DA_TWO, INPUT_CSI_DCH, INPUT_CSI_DECSCUSR, INPUT_CSI_DECSTBM, INPUT_CSI_DL, INPUT_CSI_DSR, INPUT_CSI_ECH, INPUT_CSI_ED, INPUT_CSI_EL, INPUT_CSI_HPA, INPUT_CSI_ICH, INPUT_CSI_IL, INPUT_CSI_RCP, INPUT_CSI_REP, INPUT_CSI_RM, INPUT_CSI_RM_PRIVATE, INPUT_CSI_SCP, INPUT_CSI_SD, INPUT_CSI_SGR, INPUT_CSI_SM, INPUT_CSI_SM_PRIVATE, INPUT_CSI_SU, INPUT_CSI_TBC, INPUT_CSI_VPA, INPUT_CSI_WINOPS, }; /* Control (CSI) command table. */ static const struct input_table_entry input_csi_table[] = { { '@', "", INPUT_CSI_ICH }, { 'A', "", INPUT_CSI_CUU }, { 'B', "", INPUT_CSI_CUD }, { 'C', "", INPUT_CSI_CUF }, { 'D', "", INPUT_CSI_CUB }, { 'E', "", INPUT_CSI_CNL }, { 'F', "", INPUT_CSI_CPL }, { 'G', "", INPUT_CSI_HPA }, { 'H', "", INPUT_CSI_CUP }, { 'J', "", INPUT_CSI_ED }, { 'K', "", INPUT_CSI_EL }, { 'L', "", INPUT_CSI_IL }, { 'M', "", INPUT_CSI_DL }, { 'P', "", INPUT_CSI_DCH }, { 'S', "", INPUT_CSI_SU }, { 'T', "", INPUT_CSI_SD }, { 'X', "", INPUT_CSI_ECH }, { 'Z', "", INPUT_CSI_CBT }, { '`', "", INPUT_CSI_HPA }, { 'b', "", INPUT_CSI_REP }, { 'c', "", INPUT_CSI_DA }, { 'c', ">", INPUT_CSI_DA_TWO }, { 'd', "", INPUT_CSI_VPA }, { 'f', "", INPUT_CSI_CUP }, { 'g', "", INPUT_CSI_TBC }, { 'h', "", INPUT_CSI_SM }, { 'h', "?", INPUT_CSI_SM_PRIVATE }, { 'l', "", INPUT_CSI_RM }, { 'l', "?", INPUT_CSI_RM_PRIVATE }, { 'm', "", INPUT_CSI_SGR }, { 'n', "", INPUT_CSI_DSR }, { 'q', " ", INPUT_CSI_DECSCUSR }, { 'r', "", INPUT_CSI_DECSTBM }, { 's', "", INPUT_CSI_SCP }, { 't', "", INPUT_CSI_WINOPS }, { 'u', "", INPUT_CSI_RCP }, }; /* Input transition. */ struct input_transition { int first; int last; int (*handler)(struct input_ctx *); const struct input_state *state; }; /* Input state. */ struct input_state { const char *name; void (*enter)(struct input_ctx *); void (*exit)(struct input_ctx *); const struct input_transition *transitions; }; /* State transitions available from all states. */ #define INPUT_STATE_ANYWHERE \ { 0x18, 0x18, input_c0_dispatch, &input_state_ground }, \ { 0x1a, 0x1a, input_c0_dispatch, &input_state_ground }, \ { 0x1b, 0x1b, NULL, &input_state_esc_enter } /* Forward declarations of state tables. */ static const struct input_transition input_state_ground_table[]; static const struct input_transition input_state_esc_enter_table[]; static const struct input_transition input_state_esc_intermediate_table[]; static const struct input_transition input_state_csi_enter_table[]; static const struct input_transition input_state_csi_parameter_table[]; static const struct input_transition input_state_csi_intermediate_table[]; static const struct input_transition input_state_csi_ignore_table[]; static const struct input_transition input_state_dcs_enter_table[]; static const struct input_transition input_state_dcs_parameter_table[]; static const struct input_transition input_state_dcs_intermediate_table[]; static const struct input_transition input_state_dcs_handler_table[]; static const struct input_transition input_state_dcs_escape_table[]; static const struct input_transition input_state_dcs_ignore_table[]; static const struct input_transition input_state_osc_string_table[]; static const struct input_transition input_state_apc_string_table[]; static const struct input_transition input_state_rename_string_table[]; static const struct input_transition input_state_consume_st_table[]; /* ground state definition. */ static const struct input_state input_state_ground = { "ground", input_ground, NULL, input_state_ground_table }; /* esc_enter state definition. */ static const struct input_state input_state_esc_enter = { "esc_enter", input_clear, NULL, input_state_esc_enter_table }; /* esc_intermediate state definition. */ static const struct input_state input_state_esc_intermediate = { "esc_intermediate", NULL, NULL, input_state_esc_intermediate_table }; /* csi_enter state definition. */ static const struct input_state input_state_csi_enter = { "csi_enter", input_clear, NULL, input_state_csi_enter_table }; /* csi_parameter state definition. */ static const struct input_state input_state_csi_parameter = { "csi_parameter", NULL, NULL, input_state_csi_parameter_table }; /* csi_intermediate state definition. */ static const struct input_state input_state_csi_intermediate = { "csi_intermediate", NULL, NULL, input_state_csi_intermediate_table }; /* csi_ignore state definition. */ static const struct input_state input_state_csi_ignore = { "csi_ignore", NULL, NULL, input_state_csi_ignore_table }; /* dcs_enter state definition. */ static const struct input_state input_state_dcs_enter = { "dcs_enter", input_enter_dcs, NULL, input_state_dcs_enter_table }; /* dcs_parameter state definition. */ static const struct input_state input_state_dcs_parameter = { "dcs_parameter", NULL, NULL, input_state_dcs_parameter_table }; /* dcs_intermediate state definition. */ static const struct input_state input_state_dcs_intermediate = { "dcs_intermediate", NULL, NULL, input_state_dcs_intermediate_table }; /* dcs_handler state definition. */ static const struct input_state input_state_dcs_handler = { "dcs_handler", NULL, NULL, input_state_dcs_handler_table }; /* dcs_escape state definition. */ static const struct input_state input_state_dcs_escape = { "dcs_escape", NULL, NULL, input_state_dcs_escape_table }; /* dcs_ignore state definition. */ static const struct input_state input_state_dcs_ignore = { "dcs_ignore", NULL, NULL, input_state_dcs_ignore_table }; /* osc_string state definition. */ static const struct input_state input_state_osc_string = { "osc_string", input_enter_osc, input_exit_osc, input_state_osc_string_table }; /* apc_string state definition. */ static const struct input_state input_state_apc_string = { "apc_string", input_enter_apc, input_exit_apc, input_state_apc_string_table }; /* rename_string state definition. */ static const struct input_state input_state_rename_string = { "rename_string", input_enter_rename, input_exit_rename, input_state_rename_string_table }; /* consume_st state definition. */ static const struct input_state input_state_consume_st = { "consume_st", input_enter_rename, NULL, /* rename also waits for ST */ input_state_consume_st_table }; /* ground state table. */ static const struct input_transition input_state_ground_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, input_c0_dispatch, NULL }, { 0x19, 0x19, input_c0_dispatch, NULL }, { 0x1c, 0x1f, input_c0_dispatch, NULL }, { 0x20, 0x7e, input_print, NULL }, { 0x7f, 0x7f, NULL, NULL }, { 0x80, 0xff, input_top_bit_set, NULL }, { -1, -1, NULL, NULL } }; /* esc_enter state table. */ static const struct input_transition input_state_esc_enter_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, input_c0_dispatch, NULL }, { 0x19, 0x19, input_c0_dispatch, NULL }, { 0x1c, 0x1f, input_c0_dispatch, NULL }, { 0x20, 0x2f, input_intermediate, &input_state_esc_intermediate }, { 0x30, 0x4f, input_esc_dispatch, &input_state_ground }, { 0x50, 0x50, NULL, &input_state_dcs_enter }, { 0x51, 0x57, input_esc_dispatch, &input_state_ground }, { 0x58, 0x58, NULL, &input_state_consume_st }, { 0x59, 0x59, input_esc_dispatch, &input_state_ground }, { 0x5a, 0x5a, input_esc_dispatch, &input_state_ground }, { 0x5b, 0x5b, NULL, &input_state_csi_enter }, { 0x5c, 0x5c, input_esc_dispatch, &input_state_ground }, { 0x5d, 0x5d, NULL, &input_state_osc_string }, { 0x5e, 0x5e, NULL, &input_state_consume_st }, { 0x5f, 0x5f, NULL, &input_state_apc_string }, { 0x60, 0x6a, input_esc_dispatch, &input_state_ground }, { 0x6b, 0x6b, NULL, &input_state_rename_string }, { 0x6c, 0x7e, input_esc_dispatch, &input_state_ground }, { 0x7f, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* esc_intermediate state table. */ static const struct input_transition input_state_esc_intermediate_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, input_c0_dispatch, NULL }, { 0x19, 0x19, input_c0_dispatch, NULL }, { 0x1c, 0x1f, input_c0_dispatch, NULL }, { 0x20, 0x2f, input_intermediate, NULL }, { 0x30, 0x7e, input_esc_dispatch, &input_state_ground }, { 0x7f, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* csi_enter state table. */ static const struct input_transition input_state_csi_enter_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, input_c0_dispatch, NULL }, { 0x19, 0x19, input_c0_dispatch, NULL }, { 0x1c, 0x1f, input_c0_dispatch, NULL }, { 0x20, 0x2f, input_intermediate, &input_state_csi_intermediate }, { 0x30, 0x39, input_parameter, &input_state_csi_parameter }, { 0x3a, 0x3a, input_parameter, &input_state_csi_parameter }, { 0x3b, 0x3b, input_parameter, &input_state_csi_parameter }, { 0x3c, 0x3f, input_intermediate, &input_state_csi_parameter }, { 0x40, 0x7e, input_csi_dispatch, &input_state_ground }, { 0x7f, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* csi_parameter state table. */ static const struct input_transition input_state_csi_parameter_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, input_c0_dispatch, NULL }, { 0x19, 0x19, input_c0_dispatch, NULL }, { 0x1c, 0x1f, input_c0_dispatch, NULL }, { 0x20, 0x2f, input_intermediate, &input_state_csi_intermediate }, { 0x30, 0x39, input_parameter, NULL }, { 0x3a, 0x3a, input_parameter, NULL }, { 0x3b, 0x3b, input_parameter, NULL }, { 0x3c, 0x3f, NULL, &input_state_csi_ignore }, { 0x40, 0x7e, input_csi_dispatch, &input_state_ground }, { 0x7f, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* csi_intermediate state table. */ static const struct input_transition input_state_csi_intermediate_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, input_c0_dispatch, NULL }, { 0x19, 0x19, input_c0_dispatch, NULL }, { 0x1c, 0x1f, input_c0_dispatch, NULL }, { 0x20, 0x2f, input_intermediate, NULL }, { 0x30, 0x3f, NULL, &input_state_csi_ignore }, { 0x40, 0x7e, input_csi_dispatch, &input_state_ground }, { 0x7f, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* csi_ignore state table. */ static const struct input_transition input_state_csi_ignore_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, input_c0_dispatch, NULL }, { 0x19, 0x19, input_c0_dispatch, NULL }, { 0x1c, 0x1f, input_c0_dispatch, NULL }, { 0x20, 0x3f, NULL, NULL }, { 0x40, 0x7e, NULL, &input_state_ground }, { 0x7f, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* dcs_enter state table. */ static const struct input_transition input_state_dcs_enter_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, NULL, NULL }, { 0x19, 0x19, NULL, NULL }, { 0x1c, 0x1f, NULL, NULL }, { 0x20, 0x2f, input_intermediate, &input_state_dcs_intermediate }, { 0x30, 0x39, input_parameter, &input_state_dcs_parameter }, { 0x3a, 0x3a, NULL, &input_state_dcs_ignore }, { 0x3b, 0x3b, input_parameter, &input_state_dcs_parameter }, { 0x3c, 0x3f, input_intermediate, &input_state_dcs_parameter }, { 0x40, 0x7e, input_input, &input_state_dcs_handler }, { 0x7f, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* dcs_parameter state table. */ static const struct input_transition input_state_dcs_parameter_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, NULL, NULL }, { 0x19, 0x19, NULL, NULL }, { 0x1c, 0x1f, NULL, NULL }, { 0x20, 0x2f, input_intermediate, &input_state_dcs_intermediate }, { 0x30, 0x39, input_parameter, NULL }, { 0x3a, 0x3a, NULL, &input_state_dcs_ignore }, { 0x3b, 0x3b, input_parameter, NULL }, { 0x3c, 0x3f, NULL, &input_state_dcs_ignore }, { 0x40, 0x7e, input_input, &input_state_dcs_handler }, { 0x7f, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* dcs_intermediate state table. */ static const struct input_transition input_state_dcs_intermediate_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, NULL, NULL }, { 0x19, 0x19, NULL, NULL }, { 0x1c, 0x1f, NULL, NULL }, { 0x20, 0x2f, input_intermediate, NULL }, { 0x30, 0x3f, NULL, &input_state_dcs_ignore }, { 0x40, 0x7e, input_input, &input_state_dcs_handler }, { 0x7f, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* dcs_handler state table. */ static const struct input_transition input_state_dcs_handler_table[] = { /* No INPUT_STATE_ANYWHERE */ { 0x00, 0x1a, input_input, NULL }, { 0x1b, 0x1b, NULL, &input_state_dcs_escape }, { 0x1c, 0xff, input_input, NULL }, { -1, -1, NULL, NULL } }; /* dcs_escape state table. */ static const struct input_transition input_state_dcs_escape_table[] = { /* No INPUT_STATE_ANYWHERE */ { 0x00, 0x5b, input_input, &input_state_dcs_handler }, { 0x5c, 0x5c, input_dcs_dispatch, &input_state_ground }, { 0x5d, 0xff, input_input, &input_state_dcs_handler }, { -1, -1, NULL, NULL } }; /* dcs_ignore state table. */ static const struct input_transition input_state_dcs_ignore_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, NULL, NULL }, { 0x19, 0x19, NULL, NULL }, { 0x1c, 0x1f, NULL, NULL }, { 0x20, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* osc_string state table. */ static const struct input_transition input_state_osc_string_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x06, NULL, NULL }, { 0x07, 0x07, input_end_bel, &input_state_ground }, { 0x08, 0x17, NULL, NULL }, { 0x19, 0x19, NULL, NULL }, { 0x1c, 0x1f, NULL, NULL }, { 0x20, 0xff, input_input, NULL }, { -1, -1, NULL, NULL } }; /* apc_string state table. */ static const struct input_transition input_state_apc_string_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, NULL, NULL }, { 0x19, 0x19, NULL, NULL }, { 0x1c, 0x1f, NULL, NULL }, { 0x20, 0xff, input_input, NULL }, { -1, -1, NULL, NULL } }; /* rename_string state table. */ static const struct input_transition input_state_rename_string_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, NULL, NULL }, { 0x19, 0x19, NULL, NULL }, { 0x1c, 0x1f, NULL, NULL }, { 0x20, 0xff, input_input, NULL }, { -1, -1, NULL, NULL } }; /* consume_st state table. */ static const struct input_transition input_state_consume_st_table[] = { INPUT_STATE_ANYWHERE, { 0x00, 0x17, NULL, NULL }, { 0x19, 0x19, NULL, NULL }, { 0x1c, 0x1f, NULL, NULL }, { 0x20, 0xff, NULL, NULL }, { -1, -1, NULL, NULL } }; /* Input table compare. */ static int input_table_compare(const void *key, const void *value) { const struct input_ctx *ictx = key; const struct input_table_entry *entry = value; if (ictx->ch != entry->ch) return (ictx->ch - entry->ch); return (strcmp(ictx->interm_buf, entry->interm)); } /* * Timer - if this expires then have been waiting for a terminator for too * long, so reset to ground. */ static void input_timer_callback(__unused int fd, __unused short events, void *arg) { struct input_ctx *ictx = arg; log_debug("%s: %s expired" , __func__, ictx->state->name); input_reset(ictx, 0); } /* Start the timer. */ static void input_start_timer(struct input_ctx *ictx) { struct timeval tv = { .tv_sec = 5, .tv_usec = 0 }; event_del(&ictx->timer); event_add(&ictx->timer, &tv); } /* Reset cell state to default. */ static void input_reset_cell(struct input_ctx *ictx) { memcpy(&ictx->cell.cell, &grid_default_cell, sizeof ictx->cell.cell); ictx->cell.set = 0; ictx->cell.g0set = ictx->cell.g1set = 0; memcpy(&ictx->old_cell, &ictx->cell, sizeof ictx->old_cell); ictx->old_cx = 0; ictx->old_cy = 0; } /* Save screen state. */ static void input_save_state(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; struct screen *s = sctx->s; memcpy(&ictx->old_cell, &ictx->cell, sizeof ictx->old_cell); ictx->old_cx = s->cx; ictx->old_cy = s->cy; ictx->old_mode = s->mode; } /* Restore screen state. */ static void input_restore_state(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; memcpy(&ictx->cell, &ictx->old_cell, sizeof ictx->cell); if (ictx->old_mode & MODE_ORIGIN) screen_write_mode_set(sctx, MODE_ORIGIN); else screen_write_mode_clear(sctx, MODE_ORIGIN); screen_write_cursormove(sctx, ictx->old_cx, ictx->old_cy, 0); } /* Initialise input parser. */ struct input_ctx * input_init(struct window_pane *wp, struct bufferevent *bev) { struct input_ctx *ictx; ictx = xcalloc(1, sizeof *ictx); ictx->wp = wp; ictx->event = bev; ictx->input_space = INPUT_BUF_START; ictx->input_buf = xmalloc(INPUT_BUF_START); ictx->since_ground = evbuffer_new(); if (ictx->since_ground == NULL) fatalx("out of memory"); evtimer_set(&ictx->timer, input_timer_callback, ictx); input_reset(ictx, 0); return (ictx); } /* Destroy input parser. */ void input_free(struct input_ctx *ictx) { u_int i; for (i = 0; i < ictx->param_list_len; i++) { if (ictx->param_list[i].type == INPUT_STRING) free(ictx->param_list[i].str); } event_del(&ictx->timer); free(ictx->input_buf); evbuffer_free(ictx->since_ground); free(ictx); } /* Reset input state and clear screen. */ void input_reset(struct input_ctx *ictx, int clear) { struct screen_write_ctx *sctx = &ictx->ctx; struct window_pane *wp = ictx->wp; input_reset_cell(ictx); if (clear && wp != NULL) { if (TAILQ_EMPTY(&wp->modes)) screen_write_start(sctx, wp, &wp->base); else screen_write_start(sctx, NULL, &wp->base); screen_write_reset(sctx); screen_write_stop(sctx); } input_clear(ictx); ictx->last = -1; ictx->state = &input_state_ground; ictx->flags = 0; } /* Return pending data. */ struct evbuffer * input_pending(struct input_ctx *ictx) { return (ictx->since_ground); } /* Change input state. */ static void input_set_state(struct input_ctx *ictx, const struct input_transition *itr) { if (ictx->state->exit != NULL) ictx->state->exit(ictx); ictx->state = itr->state; if (ictx->state->enter != NULL) ictx->state->enter(ictx); } /* Parse data. */ static void input_parse(struct input_ctx *ictx, u_char *buf, size_t len) { struct screen_write_ctx *sctx = &ictx->ctx; const struct input_state *state = NULL; const struct input_transition *itr = NULL; size_t off = 0; /* Parse the input. */ while (off < len) { ictx->ch = buf[off++]; /* Find the transition. */ if (ictx->state != state || itr == NULL || ictx->ch < itr->first || ictx->ch > itr->last) { itr = ictx->state->transitions; while (itr->first != -1 && itr->last != -1) { if (ictx->ch >= itr->first && ictx->ch <= itr->last) break; itr++; } if (itr->first == -1 || itr->last == -1) { /* No transition? Eh? */ fatalx("no transition from state"); } } state = ictx->state; /* * Any state except print stops the current collection. This is * an optimization to avoid checking if the attributes have * changed for every character. It will stop unnecessarily for * sequences that don't make a terminal change, but they should * be the minority. */ if (itr->handler != input_print) screen_write_collect_end(sctx); /* * Execute the handler, if any. Don't switch state if it * returns non-zero. */ if (itr->handler != NULL && itr->handler(ictx) != 0) continue; /* And switch state, if necessary. */ if (itr->state != NULL) input_set_state(ictx, itr); /* If not in ground state, save input. */ if (ictx->state != &input_state_ground) evbuffer_add(ictx->since_ground, &ictx->ch, 1); } } /* Parse input from pane. */ void input_parse_pane(struct window_pane *wp) { struct evbuffer *evb = wp->event->input; input_parse_buffer(wp, EVBUFFER_DATA(evb), EVBUFFER_LENGTH(evb)); evbuffer_drain(evb, EVBUFFER_LENGTH(evb)); } /* Parse given input. */ void input_parse_buffer(struct window_pane *wp, u_char *buf, size_t len) { struct input_ctx *ictx = wp->ictx; struct screen_write_ctx *sctx = &ictx->ctx; if (len == 0) return; window_update_activity(wp->window); wp->flags |= PANE_CHANGED; notify_input(wp, buf, len); /* NULL wp if there is a mode set as don't want to update the tty. */ if (TAILQ_EMPTY(&wp->modes)) screen_write_start(sctx, wp, &wp->base); else screen_write_start(sctx, NULL, &wp->base); log_debug("%s: %%%u %s, %zu bytes: %.*s", __func__, wp->id, ictx->state->name, len, (int)len, buf); input_parse(ictx, buf, len); screen_write_stop(sctx); } /* Parse given input for screen. */ void input_parse_screen(struct input_ctx *ictx, struct screen *s, u_char *buf, size_t len) { struct screen_write_ctx *sctx = &ictx->ctx; if (len == 0) return; screen_write_start(sctx, NULL, s); input_parse(ictx, buf, len); screen_write_stop(sctx); } /* Split the parameter list (if any). */ static int input_split(struct input_ctx *ictx) { const char *errstr; char *ptr, *out; struct input_param *ip; u_int i; for (i = 0; i < ictx->param_list_len; i++) { if (ictx->param_list[i].type == INPUT_STRING) free(ictx->param_list[i].str); } ictx->param_list_len = 0; if (ictx->param_len == 0) return (0); ip = &ictx->param_list[0]; ptr = ictx->param_buf; while ((out = strsep(&ptr, ";")) != NULL) { if (*out == '\0') ip->type = INPUT_MISSING; else { if (strchr(out, ':') != NULL) { ip->type = INPUT_STRING; ip->str = xstrdup(out); } else { ip->type = INPUT_NUMBER; ip->num = strtonum(out, 0, INT_MAX, &errstr); if (errstr != NULL) return (-1); } } ip = &ictx->param_list[++ictx->param_list_len]; if (ictx->param_list_len == nitems(ictx->param_list)) return (-1); } for (i = 0; i < ictx->param_list_len; i++) { ip = &ictx->param_list[i]; if (ip->type == INPUT_MISSING) log_debug("parameter %u: missing", i); else if (ip->type == INPUT_STRING) log_debug("parameter %u: string %s", i, ip->str); else if (ip->type == INPUT_NUMBER) log_debug("parameter %u: number %d", i, ip->num); } return (0); } /* Get an argument or return default value. */ static int input_get(struct input_ctx *ictx, u_int validx, int minval, int defval) { struct input_param *ip; int retval; if (validx >= ictx->param_list_len) return (defval); ip = &ictx->param_list[validx]; if (ip->type == INPUT_MISSING) return (defval); if (ip->type == INPUT_STRING) return (-1); retval = ip->num; if (retval < minval) return (minval); return (retval); } /* Reply to terminal query. */ static void input_reply(struct input_ctx *ictx, const char *fmt, ...) { struct bufferevent *bev = ictx->event; va_list ap; char *reply; va_start(ap, fmt); xvasprintf(&reply, fmt, ap); va_end(ap); bufferevent_write(bev, reply, strlen(reply)); free(reply); } /* Clear saved state. */ static void input_clear(struct input_ctx *ictx) { event_del(&ictx->timer); *ictx->interm_buf = '\0'; ictx->interm_len = 0; *ictx->param_buf = '\0'; ictx->param_len = 0; *ictx->input_buf = '\0'; ictx->input_len = 0; ictx->input_end = INPUT_END_ST; ictx->flags &= ~INPUT_DISCARD; } /* Reset for ground state. */ static void input_ground(struct input_ctx *ictx) { event_del(&ictx->timer); evbuffer_drain(ictx->since_ground, EVBUFFER_LENGTH(ictx->since_ground)); if (ictx->input_space > INPUT_BUF_START) { ictx->input_space = INPUT_BUF_START; ictx->input_buf = xrealloc(ictx->input_buf, INPUT_BUF_START); } } /* Output this character to the screen. */ static int input_print(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; int set; ictx->utf8started = 0; /* can't be valid UTF-8 */ set = ictx->cell.set == 0 ? ictx->cell.g0set : ictx->cell.g1set; if (set == 1) ictx->cell.cell.attr |= GRID_ATTR_CHARSET; else ictx->cell.cell.attr &= ~GRID_ATTR_CHARSET; utf8_set(&ictx->cell.cell.data, ictx->ch); screen_write_collect_add(sctx, &ictx->cell.cell); ictx->last = ictx->ch; ictx->cell.cell.attr &= ~GRID_ATTR_CHARSET; return (0); } /* Collect intermediate string. */ static int input_intermediate(struct input_ctx *ictx) { if (ictx->interm_len == (sizeof ictx->interm_buf) - 1) ictx->flags |= INPUT_DISCARD; else { ictx->interm_buf[ictx->interm_len++] = ictx->ch; ictx->interm_buf[ictx->interm_len] = '\0'; } return (0); } /* Collect parameter string. */ static int input_parameter(struct input_ctx *ictx) { if (ictx->param_len == (sizeof ictx->param_buf) - 1) ictx->flags |= INPUT_DISCARD; else { ictx->param_buf[ictx->param_len++] = ictx->ch; ictx->param_buf[ictx->param_len] = '\0'; } return (0); } /* Collect input string. */ static int input_input(struct input_ctx *ictx) { size_t available; available = ictx->input_space; while (ictx->input_len + 1 >= available) { available *= 2; if (available > INPUT_BUF_LIMIT) { ictx->flags |= INPUT_DISCARD; return (0); } ictx->input_buf = xrealloc(ictx->input_buf, available); ictx->input_space = available; } ictx->input_buf[ictx->input_len++] = ictx->ch; ictx->input_buf[ictx->input_len] = '\0'; return (0); } /* Execute C0 control sequence. */ static int input_c0_dispatch(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; struct window_pane *wp = ictx->wp; struct screen *s = sctx->s; ictx->utf8started = 0; /* can't be valid UTF-8 */ log_debug("%s: '%c'", __func__, ictx->ch); switch (ictx->ch) { case '\000': /* NUL */ break; case '\007': /* BEL */ if (wp != NULL) alerts_queue(wp->window, WINDOW_BELL); break; case '\010': /* BS */ screen_write_backspace(sctx); break; case '\011': /* HT */ /* Don't tab beyond the end of the line. */ if (s->cx >= screen_size_x(s) - 1) break; /* Find the next tab point, or use the last column if none. */ do { s->cx++; if (bit_test(s->tabs, s->cx)) break; } while (s->cx < screen_size_x(s) - 1); break; case '\012': /* LF */ case '\013': /* VT */ case '\014': /* FF */ screen_write_linefeed(sctx, 0, ictx->cell.cell.bg); if (s->mode & MODE_CRLF) screen_write_carriagereturn(sctx); break; case '\015': /* CR */ screen_write_carriagereturn(sctx); break; case '\016': /* SO */ ictx->cell.set = 1; break; case '\017': /* SI */ ictx->cell.set = 0; break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } ictx->last = -1; return (0); } /* Execute escape sequence. */ static int input_esc_dispatch(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; struct window_pane *wp = ictx->wp; struct screen *s = sctx->s; struct input_table_entry *entry; if (ictx->flags & INPUT_DISCARD) return (0); log_debug("%s: '%c', %s", __func__, ictx->ch, ictx->interm_buf); entry = bsearch(ictx, input_esc_table, nitems(input_esc_table), sizeof input_esc_table[0], input_table_compare); if (entry == NULL) { log_debug("%s: unknown '%c'", __func__, ictx->ch); return (0); } switch (entry->type) { case INPUT_ESC_RIS: if (wp != NULL) window_pane_reset_palette(wp); input_reset_cell(ictx); screen_write_reset(sctx); break; case INPUT_ESC_IND: screen_write_linefeed(sctx, 0, ictx->cell.cell.bg); break; case INPUT_ESC_NEL: screen_write_carriagereturn(sctx); screen_write_linefeed(sctx, 0, ictx->cell.cell.bg); break; case INPUT_ESC_HTS: if (s->cx < screen_size_x(s)) bit_set(s->tabs, s->cx); break; case INPUT_ESC_RI: screen_write_reverseindex(sctx, ictx->cell.cell.bg); break; case INPUT_ESC_DECKPAM: screen_write_mode_set(sctx, MODE_KKEYPAD); break; case INPUT_ESC_DECKPNM: screen_write_mode_clear(sctx, MODE_KKEYPAD); break; case INPUT_ESC_DECSC: input_save_state(ictx); break; case INPUT_ESC_DECRC: input_restore_state(ictx); break; case INPUT_ESC_DECALN: screen_write_alignmenttest(sctx); break; case INPUT_ESC_SCSG0_ON: ictx->cell.g0set = 1; break; case INPUT_ESC_SCSG0_OFF: ictx->cell.g0set = 0; break; case INPUT_ESC_SCSG1_ON: ictx->cell.g1set = 1; break; case INPUT_ESC_SCSG1_OFF: ictx->cell.g1set = 0; break; case INPUT_ESC_ST: /* ST terminates OSC but the state transition already did it. */ break; } ictx->last = -1; return (0); } /* Execute control sequence. */ static int input_csi_dispatch(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; struct screen *s = sctx->s; struct input_table_entry *entry; int i, n, m; u_int cx, bg = ictx->cell.cell.bg; char *copy, *cp; if (ictx->flags & INPUT_DISCARD) return (0); log_debug("%s: '%c' \"%s\" \"%s\"", __func__, ictx->ch, ictx->interm_buf, ictx->param_buf); if (input_split(ictx) != 0) return (0); entry = bsearch(ictx, input_csi_table, nitems(input_csi_table), sizeof input_csi_table[0], input_table_compare); if (entry == NULL) { log_debug("%s: unknown '%c'", __func__, ictx->ch); return (0); } switch (entry->type) { case INPUT_CSI_CBT: /* Find the previous tab point, n times. */ cx = s->cx; if (cx > screen_size_x(s) - 1) cx = screen_size_x(s) - 1; n = input_get(ictx, 0, 1, 1); if (n == -1) break; while (cx > 0 && n-- > 0) { do cx--; while (cx > 0 && !bit_test(s->tabs, cx)); } s->cx = cx; break; case INPUT_CSI_CUB: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_cursorleft(sctx, n); break; case INPUT_CSI_CUD: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_cursordown(sctx, n); break; case INPUT_CSI_CUF: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_cursorright(sctx, n); break; case INPUT_CSI_CUP: n = input_get(ictx, 0, 1, 1); m = input_get(ictx, 1, 1, 1); if (n != -1 && m != -1) screen_write_cursormove(sctx, m - 1, n - 1, 1); break; case INPUT_CSI_WINOPS: input_csi_dispatch_winops(ictx); break; case INPUT_CSI_CUU: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_cursorup(sctx, n); break; case INPUT_CSI_CNL: n = input_get(ictx, 0, 1, 1); if (n != -1) { screen_write_carriagereturn(sctx); screen_write_cursordown(sctx, n); } break; case INPUT_CSI_CPL: n = input_get(ictx, 0, 1, 1); if (n != -1) { screen_write_carriagereturn(sctx); screen_write_cursorup(sctx, n); } break; case INPUT_CSI_DA: switch (input_get(ictx, 0, 0, 0)) { case -1: break; case 0: input_reply(ictx, "\033[?1;2c"); break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } break; case INPUT_CSI_DA_TWO: switch (input_get(ictx, 0, 0, 0)) { case -1: break; case 0: input_reply(ictx, "\033[>84;0;0c"); break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } break; case INPUT_CSI_ECH: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_clearcharacter(sctx, n, bg); break; case INPUT_CSI_DCH: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_deletecharacter(sctx, n, bg); break; case INPUT_CSI_DECSTBM: n = input_get(ictx, 0, 1, 1); m = input_get(ictx, 1, 1, screen_size_y(s)); if (n != -1 && m != -1) screen_write_scrollregion(sctx, n - 1, m - 1); break; case INPUT_CSI_DL: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_deleteline(sctx, n, bg); break; case INPUT_CSI_DSR: switch (input_get(ictx, 0, 0, 0)) { case -1: break; case 5: input_reply(ictx, "\033[0n"); break; case 6: input_reply(ictx, "\033[%u;%uR", s->cy + 1, s->cx + 1); break; case 1337: /* Terminal version, from iTerm2. */ copy = xstrdup(getversion()); for (cp = copy; *cp != '\0'; cp++) *cp = toupper((u_char)*cp); input_reply(ictx, "\033[TMUX %sn", copy); free(copy); break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } break; case INPUT_CSI_ED: switch (input_get(ictx, 0, 0, 0)) { case -1: break; case 0: screen_write_clearendofscreen(sctx, bg); break; case 1: screen_write_clearstartofscreen(sctx, bg); break; case 2: screen_write_clearscreen(sctx, bg); break; case 3: if (input_get(ictx, 1, 0, 0) == 0) { /* * Linux console extension to clear history * (for example before locking the screen). */ screen_write_clearhistory(sctx); } break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } break; case INPUT_CSI_EL: switch (input_get(ictx, 0, 0, 0)) { case -1: break; case 0: screen_write_clearendofline(sctx, bg); break; case 1: screen_write_clearstartofline(sctx, bg); break; case 2: screen_write_clearline(sctx, bg); break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } break; case INPUT_CSI_HPA: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_cursormove(sctx, n - 1, -1, 1); break; case INPUT_CSI_ICH: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_insertcharacter(sctx, n, bg); break; case INPUT_CSI_IL: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_insertline(sctx, n, bg); break; case INPUT_CSI_REP: n = input_get(ictx, 0, 1, 1); if (n == -1) break; if (ictx->last == -1) break; ictx->ch = ictx->last; for (i = 0; i < n; i++) input_print(ictx); break; case INPUT_CSI_RCP: input_restore_state(ictx); break; case INPUT_CSI_RM: input_csi_dispatch_rm(ictx); break; case INPUT_CSI_RM_PRIVATE: input_csi_dispatch_rm_private(ictx); break; case INPUT_CSI_SCP: input_save_state(ictx); break; case INPUT_CSI_SGR: input_csi_dispatch_sgr(ictx); break; case INPUT_CSI_SM: input_csi_dispatch_sm(ictx); break; case INPUT_CSI_SM_PRIVATE: input_csi_dispatch_sm_private(ictx); break; case INPUT_CSI_SU: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_scrollup(sctx, n, bg); break; case INPUT_CSI_SD: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_scrolldown(sctx, n, bg); break; case INPUT_CSI_TBC: switch (input_get(ictx, 0, 0, 0)) { case -1: break; case 0: if (s->cx < screen_size_x(s)) bit_clear(s->tabs, s->cx); break; case 3: bit_nclear(s->tabs, 0, screen_size_x(s) - 1); break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } break; case INPUT_CSI_VPA: n = input_get(ictx, 0, 1, 1); if (n != -1) screen_write_cursormove(sctx, -1, n - 1, 1); break; case INPUT_CSI_DECSCUSR: n = input_get(ictx, 0, 0, 0); if (n != -1) screen_set_cursor_style(s, n); break; } ictx->last = -1; return (0); } /* Handle CSI RM. */ static void input_csi_dispatch_rm(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; u_int i; for (i = 0; i < ictx->param_list_len; i++) { switch (input_get(ictx, i, 0, -1)) { case -1: break; case 4: /* IRM */ screen_write_mode_clear(sctx, MODE_INSERT); break; case 34: screen_write_mode_set(sctx, MODE_BLINKING); break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } } } /* Handle CSI private RM. */ static void input_csi_dispatch_rm_private(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; struct window_pane *wp = ictx->wp; struct grid_cell *gc = &ictx->cell.cell; u_int i; for (i = 0; i < ictx->param_list_len; i++) { switch (input_get(ictx, i, 0, -1)) { case -1: break; case 1: /* DECCKM */ screen_write_mode_clear(sctx, MODE_KCURSOR); break; case 3: /* DECCOLM */ screen_write_cursormove(sctx, 0, 0, 1); screen_write_clearscreen(sctx, gc->bg); break; case 6: /* DECOM */ screen_write_mode_clear(sctx, MODE_ORIGIN); screen_write_cursormove(sctx, 0, 0, 1); break; case 7: /* DECAWM */ screen_write_mode_clear(sctx, MODE_WRAP); break; case 12: screen_write_mode_clear(sctx, MODE_BLINKING); break; case 25: /* TCEM */ screen_write_mode_clear(sctx, MODE_CURSOR); break; case 1000: case 1001: case 1002: case 1003: screen_write_mode_clear(sctx, ALL_MOUSE_MODES); break; case 1004: screen_write_mode_clear(sctx, MODE_FOCUSON); break; case 1005: screen_write_mode_clear(sctx, MODE_MOUSE_UTF8); break; case 1006: screen_write_mode_clear(sctx, MODE_MOUSE_SGR); break; case 47: case 1047: if (wp != NULL) window_pane_alternate_off(wp, gc, 0); break; case 1049: if (wp != NULL) window_pane_alternate_off(wp, gc, 1); break; case 2004: screen_write_mode_clear(sctx, MODE_BRACKETPASTE); break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } } } /* Handle CSI SM. */ static void input_csi_dispatch_sm(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; u_int i; for (i = 0; i < ictx->param_list_len; i++) { switch (input_get(ictx, i, 0, -1)) { case -1: break; case 4: /* IRM */ screen_write_mode_set(sctx, MODE_INSERT); break; case 34: screen_write_mode_clear(sctx, MODE_BLINKING); break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } } } /* Handle CSI private SM. */ static void input_csi_dispatch_sm_private(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; struct window_pane *wp = ictx->wp; struct grid_cell *gc = &ictx->cell.cell; u_int i; for (i = 0; i < ictx->param_list_len; i++) { switch (input_get(ictx, i, 0, -1)) { case -1: break; case 1: /* DECCKM */ screen_write_mode_set(sctx, MODE_KCURSOR); break; case 3: /* DECCOLM */ screen_write_cursormove(sctx, 0, 0, 1); screen_write_clearscreen(sctx, ictx->cell.cell.bg); break; case 6: /* DECOM */ screen_write_mode_set(sctx, MODE_ORIGIN); screen_write_cursormove(sctx, 0, 0, 1); break; case 7: /* DECAWM */ screen_write_mode_set(sctx, MODE_WRAP); break; case 12: screen_write_mode_set(sctx, MODE_BLINKING); break; case 25: /* TCEM */ screen_write_mode_set(sctx, MODE_CURSOR); break; case 1000: screen_write_mode_clear(sctx, ALL_MOUSE_MODES); screen_write_mode_set(sctx, MODE_MOUSE_STANDARD); break; case 1002: screen_write_mode_clear(sctx, ALL_MOUSE_MODES); screen_write_mode_set(sctx, MODE_MOUSE_BUTTON); break; case 1003: screen_write_mode_clear(sctx, ALL_MOUSE_MODES); screen_write_mode_set(sctx, MODE_MOUSE_ALL); break; case 1004: if (sctx->s->mode & MODE_FOCUSON) break; screen_write_mode_set(sctx, MODE_FOCUSON); if (wp != NULL) wp->flags |= PANE_FOCUSPUSH; /* force update */ break; case 1005: screen_write_mode_set(sctx, MODE_MOUSE_UTF8); break; case 1006: screen_write_mode_set(sctx, MODE_MOUSE_SGR); break; case 47: case 1047: if (wp != NULL) window_pane_alternate_on(wp, gc, 0); break; case 1049: if (wp != NULL) window_pane_alternate_on(wp, gc, 1); break; case 2004: screen_write_mode_set(sctx, MODE_BRACKETPASTE); break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } } } /* Handle CSI window operations. */ static void input_csi_dispatch_winops(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; struct screen *s = sctx->s; struct window_pane *wp = ictx->wp; u_int x = screen_size_x(s), y = screen_size_y(s); int n, m; m = 0; while ((n = input_get(ictx, m, 0, -1)) != -1) { switch (n) { case 1: case 2: case 5: case 6: case 7: case 11: case 13: case 14: case 19: case 20: case 21: case 24: break; case 3: case 4: case 8: m++; if (input_get(ictx, m, 0, -1) == -1) return; /* FALLTHROUGH */ case 9: case 10: m++; if (input_get(ictx, m, 0, -1) == -1) return; break; case 22: m++; switch (input_get(ictx, m, 0, -1)) { case -1: return; case 0: case 2: screen_push_title(sctx->s); break; } break; case 23: m++; switch (input_get(ictx, m, 0, -1)) { case -1: return; case 0: case 2: screen_pop_title(sctx->s); if (wp != NULL) server_status_window(wp->window); break; } break; case 18: input_reply(ictx, "\033[8;%u;%ut", x, y); break; default: log_debug("%s: unknown '%c'", __func__, ictx->ch); break; } m++; } } /* Helper for 256 colour SGR. */ static int input_csi_dispatch_sgr_256_do(struct input_ctx *ictx, int fgbg, int c) { struct grid_cell *gc = &ictx->cell.cell; if (c == -1 || c > 255) { if (fgbg == 38) gc->fg = 8; else if (fgbg == 48) gc->bg = 8; } else { if (fgbg == 38) gc->fg = c | COLOUR_FLAG_256; else if (fgbg == 48) gc->bg = c | COLOUR_FLAG_256; else if (fgbg == 58) gc->us = c | COLOUR_FLAG_256; } return (1); } /* Handle CSI SGR for 256 colours. */ static void input_csi_dispatch_sgr_256(struct input_ctx *ictx, int fgbg, u_int *i) { int c; c = input_get(ictx, (*i) + 1, 0, -1); if (input_csi_dispatch_sgr_256_do(ictx, fgbg, c)) (*i)++; } /* Helper for RGB colour SGR. */ static int input_csi_dispatch_sgr_rgb_do(struct input_ctx *ictx, int fgbg, int r, int g, int b) { struct grid_cell *gc = &ictx->cell.cell; if (r == -1 || r > 255) return (0); if (g == -1 || g > 255) return (0); if (b == -1 || b > 255) return (0); if (fgbg == 38) gc->fg = colour_join_rgb(r, g, b); else if (fgbg == 48) gc->bg = colour_join_rgb(r, g, b); else if (fgbg == 58) gc->us = colour_join_rgb(r, g, b); return (1); } /* Handle CSI SGR for RGB colours. */ static void input_csi_dispatch_sgr_rgb(struct input_ctx *ictx, int fgbg, u_int *i) { int r, g, b; r = input_get(ictx, (*i) + 1, 0, -1); g = input_get(ictx, (*i) + 2, 0, -1); b = input_get(ictx, (*i) + 3, 0, -1); if (input_csi_dispatch_sgr_rgb_do(ictx, fgbg, r, g, b)) (*i) += 3; } /* Handle CSI SGR with a ISO parameter. */ static void input_csi_dispatch_sgr_colon(struct input_ctx *ictx, u_int i) { struct grid_cell *gc = &ictx->cell.cell; char *s = ictx->param_list[i].str, *copy, *ptr, *out; int p[8]; u_int n; const char *errstr; for (n = 0; n < nitems(p); n++) p[n] = -1; n = 0; ptr = copy = xstrdup(s); while ((out = strsep(&ptr, ":")) != NULL) { if (*out != '\0') { p[n++] = strtonum(out, 0, INT_MAX, &errstr); if (errstr != NULL || n == nitems(p)) { free(copy); return; } } else n++; log_debug("%s: %u = %d", __func__, n - 1, p[n - 1]); } free(copy); if (n == 0) return; if (p[0] == 4) { if (n != 2) return; switch (p[1]) { case 0: gc->attr &= ~GRID_ATTR_ALL_UNDERSCORE; break; case 1: gc->attr &= ~GRID_ATTR_ALL_UNDERSCORE; gc->attr |= GRID_ATTR_UNDERSCORE; break; case 2: gc->attr &= ~GRID_ATTR_ALL_UNDERSCORE; gc->attr |= GRID_ATTR_UNDERSCORE_2; break; case 3: gc->attr &= ~GRID_ATTR_ALL_UNDERSCORE; gc->attr |= GRID_ATTR_UNDERSCORE_3; break; case 4: gc->attr &= ~GRID_ATTR_ALL_UNDERSCORE; gc->attr |= GRID_ATTR_UNDERSCORE_4; break; case 5: gc->attr &= ~GRID_ATTR_ALL_UNDERSCORE; gc->attr |= GRID_ATTR_UNDERSCORE_5; break; } return; } if (n < 2 || (p[0] != 38 && p[0] != 48 && p[0] != 58)) return; switch (p[1]) { case 2: if (n < 3) break; if (n == 5) i = 2; else i = 3; if (n < i + 3) break; input_csi_dispatch_sgr_rgb_do(ictx, p[0], p[i], p[i + 1], p[i + 2]); break; case 5: if (n < 3) break; input_csi_dispatch_sgr_256_do(ictx, p[0], p[2]); break; } } /* Handle CSI SGR. */ static void input_csi_dispatch_sgr(struct input_ctx *ictx) { struct grid_cell *gc = &ictx->cell.cell; u_int i; int n; if (ictx->param_list_len == 0) { memcpy(gc, &grid_default_cell, sizeof *gc); return; } for (i = 0; i < ictx->param_list_len; i++) { if (ictx->param_list[i].type == INPUT_STRING) { input_csi_dispatch_sgr_colon(ictx, i); continue; } n = input_get(ictx, i, 0, 0); if (n == -1) continue; if (n == 38 || n == 48 || n == 58) { i++; switch (input_get(ictx, i, 0, -1)) { case 2: input_csi_dispatch_sgr_rgb(ictx, n, &i); break; case 5: input_csi_dispatch_sgr_256(ictx, n, &i); break; } continue; } switch (n) { case 0: memcpy(gc, &grid_default_cell, sizeof *gc); break; case 1: gc->attr |= GRID_ATTR_BRIGHT; break; case 2: gc->attr |= GRID_ATTR_DIM; break; case 3: gc->attr |= GRID_ATTR_ITALICS; break; case 4: gc->attr &= ~GRID_ATTR_ALL_UNDERSCORE; gc->attr |= GRID_ATTR_UNDERSCORE; break; case 5: gc->attr |= GRID_ATTR_BLINK; break; case 7: gc->attr |= GRID_ATTR_REVERSE; break; case 8: gc->attr |= GRID_ATTR_HIDDEN; break; case 9: gc->attr |= GRID_ATTR_STRIKETHROUGH; break; case 22: gc->attr &= ~(GRID_ATTR_BRIGHT|GRID_ATTR_DIM); break; case 23: gc->attr &= ~GRID_ATTR_ITALICS; break; case 24: gc->attr &= ~GRID_ATTR_ALL_UNDERSCORE; break; case 25: gc->attr &= ~GRID_ATTR_BLINK; break; case 27: gc->attr &= ~GRID_ATTR_REVERSE; break; case 28: gc->attr &= ~GRID_ATTR_HIDDEN; break; case 29: gc->attr &= ~GRID_ATTR_STRIKETHROUGH; break; case 30: case 31: case 32: case 33: case 34: case 35: case 36: case 37: gc->fg = n - 30; break; case 39: gc->fg = 8; break; case 40: case 41: case 42: case 43: case 44: case 45: case 46: case 47: gc->bg = n - 40; break; case 49: gc->bg = 8; break; case 53: gc->attr |= GRID_ATTR_OVERLINE; break; case 55: gc->attr &= ~GRID_ATTR_OVERLINE; break; case 59: gc->us = 0; break; case 90: case 91: case 92: case 93: case 94: case 95: case 96: case 97: gc->fg = n; break; case 100: case 101: case 102: case 103: case 104: case 105: case 106: case 107: gc->bg = n - 10; break; } } } /* End of input with BEL. */ static int input_end_bel(struct input_ctx *ictx) { log_debug("%s", __func__); ictx->input_end = INPUT_END_BEL; return (0); } /* DCS string started. */ static void input_enter_dcs(struct input_ctx *ictx) { log_debug("%s", __func__); input_clear(ictx); input_start_timer(ictx); ictx->last = -1; } /* DCS terminator (ST) received. */ static int input_dcs_dispatch(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; u_char *buf = ictx->input_buf; size_t len = ictx->input_len; const char prefix[] = "tmux;"; const u_int prefixlen = (sizeof prefix) - 1; if (ictx->flags & INPUT_DISCARD) return (0); log_debug("%s: \"%s\"", __func__, buf); if (len >= prefixlen && strncmp(buf, prefix, prefixlen) == 0) screen_write_rawstring(sctx, buf + prefixlen, len - prefixlen); return (0); } /* OSC string started. */ static void input_enter_osc(struct input_ctx *ictx) { log_debug("%s", __func__); input_clear(ictx); input_start_timer(ictx); ictx->last = -1; } /* OSC terminator (ST) received. */ static void input_exit_osc(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; struct window_pane *wp = ictx->wp; u_char *p = ictx->input_buf; u_int option; if (ictx->flags & INPUT_DISCARD) return; if (ictx->input_len < 1 || *p < '0' || *p > '9') return; log_debug("%s: \"%s\" (end %s)", __func__, p, ictx->input_end == INPUT_END_ST ? "ST" : "BEL"); option = 0; while (*p >= '0' && *p <= '9') option = option * 10 + *p++ - '0'; if (*p == ';') p++; switch (option) { case 0: case 2: if (screen_set_title(sctx->s, p) && wp != NULL) server_status_window(ictx->wp->window); break; case 4: input_osc_4(ictx, p); break; case 7: if (utf8_isvalid(p)) { screen_set_path(sctx->s, p); if (wp != NULL) server_status_window(wp->window); } break; case 10: input_osc_10(ictx, p); break; case 11: input_osc_11(ictx, p); break; case 12: if (utf8_isvalid(p) && *p != '?') /* ? is colour request */ screen_set_cursor_colour(sctx->s, p); break; case 52: input_osc_52(ictx, p); break; case 104: input_osc_104(ictx, p); break; case 112: if (*p == '\0') /* no arguments allowed */ screen_set_cursor_colour(sctx->s, ""); break; default: log_debug("%s: unknown '%u'", __func__, option); break; } } /* APC string started. */ static void input_enter_apc(struct input_ctx *ictx) { log_debug("%s", __func__); input_clear(ictx); input_start_timer(ictx); ictx->last = -1; } /* APC terminator (ST) received. */ static void input_exit_apc(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; struct window_pane *wp = ictx->wp; if (ictx->flags & INPUT_DISCARD) return; log_debug("%s: \"%s\"", __func__, ictx->input_buf); if (screen_set_title(sctx->s, ictx->input_buf) && wp != NULL) server_status_window(wp->window); } /* Rename string started. */ static void input_enter_rename(struct input_ctx *ictx) { log_debug("%s", __func__); input_clear(ictx); input_start_timer(ictx); ictx->last = -1; } /* Rename terminator (ST) received. */ static void input_exit_rename(struct input_ctx *ictx) { struct window_pane *wp = ictx->wp; struct options_entry *oe; if (wp == NULL) return; if (ictx->flags & INPUT_DISCARD) return; if (!options_get_number(ictx->wp->options, "allow-rename")) return; log_debug("%s: \"%s\"", __func__, ictx->input_buf); if (!utf8_isvalid(ictx->input_buf)) return; if (ictx->input_len == 0) { oe = options_get(wp->window->options, "automatic-rename"); if (oe != NULL) options_remove(oe); return; } window_set_name(wp->window, ictx->input_buf); options_set_number(wp->window->options, "automatic-rename", 0); server_status_window(wp->window); } /* Open UTF-8 character. */ static int input_top_bit_set(struct input_ctx *ictx) { struct screen_write_ctx *sctx = &ictx->ctx; struct utf8_data *ud = &ictx->utf8data; ictx->last = -1; if (!ictx->utf8started) { if (utf8_open(ud, ictx->ch) != UTF8_MORE) return (0); ictx->utf8started = 1; return (0); } switch (utf8_append(ud, ictx->ch)) { case UTF8_MORE: return (0); case UTF8_ERROR: ictx->utf8started = 0; return (0); case UTF8_DONE: break; } ictx->utf8started = 0; log_debug("%s %hhu '%*s' (width %hhu)", __func__, ud->size, (int)ud->size, ud->data, ud->width); utf8_copy(&ictx->cell.cell.data, ud); screen_write_collect_add(sctx, &ictx->cell.cell); return (0); } /* Parse colour from OSC. */ static int input_osc_parse_colour(const char *p, u_int *r, u_int *g, u_int *b) { u_int rsize, gsize, bsize; const char *cp, *s = p; if (sscanf(p, "rgb:%x/%x/%x", r, g, b) != 3) return (0); p += 4; cp = strchr(p, '/'); rsize = cp - p; if (rsize == 1) (*r) = (*r) | ((*r) << 4); else if (rsize == 3) (*r) >>= 4; else if (rsize == 4) (*r) >>= 8; else if (rsize != 2) return (0); p = cp + 1; cp = strchr(p, '/'); gsize = cp - p; if (gsize == 1) (*g) = (*g) | ((*g) << 4); else if (gsize == 3) (*g) >>= 4; else if (gsize == 4) (*g) >>= 8; else if (gsize != 2) return (0); bsize = strlen(cp + 1); if (bsize == 1) (*b) = (*b) | ((*b) << 4); else if (bsize == 3) (*b) >>= 4; else if (bsize == 4) (*b) >>= 8; else if (bsize != 2) return (0); log_debug("%s: %s = %02x%02x%02x", __func__, s, *r, *g, *b); return (1); } /* Handle the OSC 4 sequence for setting (multiple) palette entries. */ static void input_osc_4(struct input_ctx *ictx, const char *p) { struct window_pane *wp = ictx->wp; char *copy, *s, *next = NULL; long idx; u_int r, g, b; if (wp == NULL) return; copy = s = xstrdup(p); while (s != NULL && *s != '\0') { idx = strtol(s, &next, 10); if (*next++ != ';') goto bad; if (idx < 0 || idx >= 0x100) goto bad; s = strsep(&next, ";"); if (!input_osc_parse_colour(s, &r, &g, &b)) { s = next; continue; } window_pane_set_palette(wp, idx, colour_join_rgb(r, g, b)); s = next; } free(copy); return; bad: log_debug("bad OSC 4: %s", p); free(copy); } /* Handle the OSC 10 sequence for setting foreground colour. */ static void input_osc_10(struct input_ctx *ictx, const char *p) { struct window_pane *wp = ictx->wp; u_int r, g, b; char tmp[16]; if (wp == NULL) return; if (strcmp(p, "?") == 0) return; if (!input_osc_parse_colour(p, &r, &g, &b)) goto bad; xsnprintf(tmp, sizeof tmp, "fg=#%02x%02x%02x", r, g, b); options_set_style(wp->options, "window-style", 1, tmp); options_set_style(wp->options, "window-active-style", 1, tmp); wp->flags |= (PANE_REDRAW|PANE_STYLECHANGED); return; bad: log_debug("bad OSC 10: %s", p); } /* Handle the OSC 11 sequence for setting background colour. */ static void input_osc_11(struct input_ctx *ictx, const char *p) { struct window_pane *wp = ictx->wp; u_int r, g, b; char tmp[16]; if (wp == NULL) return; if (strcmp(p, "?") == 0) return; if (!input_osc_parse_colour(p, &r, &g, &b)) goto bad; xsnprintf(tmp, sizeof tmp, "bg=#%02x%02x%02x", r, g, b); options_set_style(wp->options, "window-style", 1, tmp); options_set_style(wp->options, "window-active-style", 1, tmp); wp->flags |= (PANE_REDRAW|PANE_STYLECHANGED); return; bad: log_debug("bad OSC 11: %s", p); } /* Handle the OSC 52 sequence for setting the clipboard. */ static void input_osc_52(struct input_ctx *ictx, const char *p) { struct window_pane *wp = ictx->wp; char *end; const char *buf; size_t len; u_char *out; int outlen, state; struct screen_write_ctx ctx; struct paste_buffer *pb; if (wp == NULL) return; state = options_get_number(global_options, "set-clipboard"); if (state != 2) return; if ((end = strchr(p, ';')) == NULL) return; end++; if (*end == '\0') return; log_debug("%s: %s", __func__, end); if (strcmp(end, "?") == 0) { if ((pb = paste_get_top(NULL)) != NULL) { buf = paste_buffer_data(pb, &len); outlen = 4 * ((len + 2) / 3) + 1; out = xmalloc(outlen); if ((outlen = b64_ntop(buf, len, out, outlen)) == -1) { free(out); return; } } else { outlen = 0; out = NULL; } bufferevent_write(ictx->event, "\033]52;;", 6); if (outlen != 0) bufferevent_write(ictx->event, out, outlen); if (ictx->input_end == INPUT_END_BEL) bufferevent_write(ictx->event, "\007", 1); else bufferevent_write(ictx->event, "\033\\", 2); free(out); return; } len = (strlen(end) / 4) * 3; if (len == 0) return; out = xmalloc(len); if ((outlen = b64_pton(end, out, len)) == -1) { free(out); return; } screen_write_start(&ctx, wp, NULL); screen_write_setselection(&ctx, out, outlen); screen_write_stop(&ctx); notify_pane("pane-set-clipboard", wp); paste_add(NULL, out, outlen); } /* Handle the OSC 104 sequence for unsetting (multiple) palette entries. */ static void input_osc_104(struct input_ctx *ictx, const char *p) { struct window_pane *wp = ictx->wp; char *copy, *s; long idx; if (wp == NULL) return; if (*p == '\0') { window_pane_reset_palette(wp); return; } copy = s = xstrdup(p); while (*s != '\0') { idx = strtol(s, &s, 10); if (*s != '\0' && *s != ';') goto bad; if (idx < 0 || idx >= 0x100) goto bad; window_pane_unset_palette(wp, idx); if (*s == ';') s++; } free(copy); return; bad: log_debug("bad OSC 104: %s", p); free(copy); }