| 1 | /* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
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| 2 | * All rights reserved.
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| 3 | * Copyright (c) 2008, Jiri Svoboda - All Rights Reserved
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions are met:
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| 7 | *
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| 8 | * Redistributions of source code must retain the above copyright notice, this
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| 9 | * list of conditions and the following disclaimer.
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| 10 | *
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| 11 | * Redistributions in binary form must reproduce the above copyright notice,
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| 12 | * this list of conditions and the following disclaimer in the documentation
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| 13 | * and/or other materials provided with the distribution.
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| 14 | *
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| 15 | * Neither the name of the original program's authors nor the names of its
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| 16 | * contributors may be used to endorse or promote products derived from this
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| 17 | * software without specific prior written permission.
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| 18 | *
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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| 20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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| 23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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| 29 | * POSSIBILITY OF SUCH DAMAGE.
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| 30 | */
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| 31 |
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| 32 | #include <stdio.h>
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| 33 | #include <stdlib.h>
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| 34 | #include <string.h>
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| 35 | #include <io/console.h>
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| 36 | #include <io/keycode.h>
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| 37 | #include <io/style.h>
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| 38 | #include <vfs/vfs.h>
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| 39 | #include <errno.h>
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| 40 | #include <assert.h>
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| 41 | #include <bool.h>
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| 42 |
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| 43 | #include "config.h"
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| 44 | #include "util.h"
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| 45 | #include "scli.h"
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| 46 | #include "input.h"
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| 47 | #include "errors.h"
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| 48 | #include "exec.h"
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| 49 |
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| 50 | #define HISTORY_LEN 10
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| 51 |
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| 52 | typedef struct {
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| 53 | wchar_t buffer[INPUT_MAX];
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| 54 | int col0, row0;
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| 55 | int con_cols, con_rows;
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| 56 | int nc;
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| 57 | int pos;
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| 58 |
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| 59 | char *history[1 + HISTORY_LEN];
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| 60 | int hnum;
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| 61 | int hpos;
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| 62 | } tinput_t;
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| 63 |
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| 64 | typedef enum {
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| 65 | seek_backward = -1,
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| 66 | seek_forward = 1
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| 67 | } seek_dir_t;
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| 68 |
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| 69 | static tinput_t tinput;
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| 70 |
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| 71 | static char *tinput_read(tinput_t *ti);
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| 72 |
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| 73 | /* Tokenizes input from console, sees if the first word is a built-in, if so
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| 74 | * invokes the built-in entry point (a[0]) passing all arguments in a[] to
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| 75 | * the handler */
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| 76 | int tok_input(cliuser_t *usr)
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| 77 | {
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| 78 | char *cmd[WORD_MAX];
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| 79 | int n = 0, i = 0;
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| 80 | int rc = 0;
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| 81 | char *tmp;
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| 82 |
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| 83 | if (NULL == usr->line)
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| 84 | return CL_EFAIL;
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| 85 |
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| 86 | tmp = str_dup(usr->line);
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| 87 |
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| 88 | cmd[n] = strtok(tmp, " ");
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| 89 | while (cmd[n] && n < WORD_MAX) {
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| 90 | cmd[++n] = strtok(NULL, " ");
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| 91 | }
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| 92 |
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| 93 | /* We have rubbish */
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| 94 | if (NULL == cmd[0]) {
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| 95 | rc = CL_ENOENT;
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| 96 | goto finit;
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| 97 | }
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| 98 |
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| 99 | /* Its a builtin command ? */
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| 100 | if ((i = (is_builtin(cmd[0]))) > -1) {
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| 101 | rc = run_builtin(i, cmd, usr);
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| 102 | goto finit;
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| 103 | /* Its a module ? */
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| 104 | } else if ((i = (is_module(cmd[0]))) > -1) {
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| 105 | rc = run_module(i, cmd);
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| 106 | goto finit;
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| 107 | }
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| 108 |
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| 109 | /* See what try_exec thinks of it */
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| 110 | rc = try_exec(cmd[0], cmd);
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| 111 |
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| 112 | finit:
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| 113 | if (NULL != usr->line) {
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| 114 | free(usr->line);
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| 115 | usr->line = (char *) NULL;
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| 116 | }
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| 117 | if (NULL != tmp)
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| 118 | free(tmp);
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| 119 |
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| 120 | return rc;
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| 121 | }
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| 122 |
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| 123 | static void tinput_display_tail(tinput_t *ti, int start, int pad)
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| 124 | {
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| 125 | int i;
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| 126 |
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| 127 | console_goto(fphone(stdout), ti->col0 + start, ti->row0);
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| 128 | printf("%ls", ti->buffer + start);
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| 129 | for (i = 0; i < pad; ++i)
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| 130 | putchar(' ');
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| 131 | fflush(stdout);
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| 132 | }
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| 133 |
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| 134 | static char *tinput_get_str(tinput_t *ti)
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| 135 | {
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| 136 | return wstr_to_astr(ti->buffer);
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| 137 | }
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| 138 |
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| 139 | static void tinput_position_caret(tinput_t *ti)
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| 140 | {
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| 141 | console_goto(fphone(stdout), ti->col0 + ti->pos, ti->row0);
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| 142 | }
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| 143 |
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| 144 | static void tinput_insert_char(tinput_t *ti, wchar_t c)
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| 145 | {
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| 146 | int i;
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| 147 |
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| 148 | if (ti->nc == INPUT_MAX)
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| 149 | return;
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| 150 |
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| 151 | if (ti->col0 + ti->nc >= ti->con_cols - 1)
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| 152 | return;
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| 153 |
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| 154 | for (i = ti->nc; i > ti->pos; --i)
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| 155 | ti->buffer[i] = ti->buffer[i - 1];
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| 156 |
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| 157 | ti->buffer[ti->pos] = c;
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| 158 | ti->pos += 1;
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| 159 | ti->nc += 1;
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| 160 | ti->buffer[ti->nc] = '\0';
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| 161 |
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| 162 | tinput_display_tail(ti, ti->pos - 1, 0);
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| 163 | tinput_position_caret(ti);
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| 164 | }
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| 165 |
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| 166 | static void tinput_backspace(tinput_t *ti)
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| 167 | {
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| 168 | int i;
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| 169 |
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| 170 | if (ti->pos == 0)
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| 171 | return;
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| 172 |
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| 173 | for (i = ti->pos; i < ti->nc; ++i)
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| 174 | ti->buffer[i - 1] = ti->buffer[i];
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| 175 | ti->pos -= 1;
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| 176 | ti->nc -= 1;
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| 177 | ti->buffer[ti->nc] = '\0';
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| 178 |
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| 179 | tinput_display_tail(ti, ti->pos, 1);
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| 180 | tinput_position_caret(ti);
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| 181 | }
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| 182 |
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| 183 | static void tinput_delete(tinput_t *ti)
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| 184 | {
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| 185 | if (ti->pos == ti->nc)
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| 186 | return;
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| 187 |
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| 188 | ti->pos += 1;
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| 189 | tinput_backspace(ti);
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| 190 | }
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| 191 |
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| 192 | static void tinput_seek_cell(tinput_t *ti, seek_dir_t dir)
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| 193 | {
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| 194 | if (dir == seek_forward) {
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| 195 | if (ti->pos < ti->nc)
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| 196 | ti->pos += 1;
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| 197 | } else {
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| 198 | if (ti->pos > 0)
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| 199 | ti->pos -= 1;
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| 200 | }
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| 201 |
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| 202 | tinput_position_caret(ti);
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| 203 | }
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| 204 |
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| 205 | static void tinput_seek_word(tinput_t *ti, seek_dir_t dir)
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| 206 | {
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| 207 | if (dir == seek_forward) {
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| 208 | if (ti->pos == ti->nc)
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| 209 | return;
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| 210 |
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| 211 | while (1) {
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| 212 | ti->pos += 1;
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| 213 |
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| 214 | if (ti->pos == ti->nc)
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| 215 | break;
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| 216 |
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| 217 | if (ti->buffer[ti->pos - 1] == ' ' &&
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| 218 | ti->buffer[ti->pos] != ' ')
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| 219 | break;
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| 220 | }
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| 221 | } else {
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| 222 | if (ti->pos == 0)
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| 223 | return;
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| 224 |
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| 225 | while (1) {
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| 226 | ti->pos -= 1;
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| 227 |
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| 228 | if (ti->pos == 0)
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| 229 | break;
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| 230 |
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| 231 | if (ti->buffer[ti->pos - 1] == ' ' &&
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| 232 | ti->buffer[ti->pos] != ' ')
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| 233 | break;
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| 234 | }
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| 235 |
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| 236 | }
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| 237 |
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| 238 | tinput_position_caret(ti);
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| 239 | }
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| 240 |
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| 241 | static void tinput_seek_max(tinput_t *ti, seek_dir_t dir)
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| 242 | {
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| 243 | if (dir == seek_backward)
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| 244 | ti->pos = 0;
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| 245 | else
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| 246 | ti->pos = ti->nc;
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| 247 |
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| 248 | tinput_position_caret(ti);
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| 249 | }
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| 250 |
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| 251 | static void tinput_history_insert(tinput_t *ti, char *str)
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| 252 | {
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| 253 | int i;
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| 254 |
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| 255 | if (ti->hnum < HISTORY_LEN) {
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| 256 | ti->hnum += 1;
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| 257 | } else {
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| 258 | if (ti->history[HISTORY_LEN] != NULL)
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| 259 | free(ti->history[HISTORY_LEN]);
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| 260 | }
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| 261 |
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| 262 | for (i = ti->hnum; i > 1; --i)
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| 263 | ti->history[i] = ti->history[i - 1];
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| 264 |
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| 265 | ti->history[1] = str_dup(str);
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| 266 |
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| 267 | if (ti->history[0] != NULL) {
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| 268 | free(ti->history[0]);
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| 269 | ti->history[0] = NULL;
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| 270 | }
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| 271 | }
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| 272 |
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| 273 | static void tinput_set_str(tinput_t *ti, char *str)
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| 274 | {
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| 275 | str_to_wstr(ti->buffer, INPUT_MAX, str);
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| 276 | ti->nc = wstr_length(ti->buffer);
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| 277 | ti->pos = ti->nc;
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| 278 | }
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| 279 |
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| 280 | static void tinput_history_seek(tinput_t *ti, int offs)
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| 281 | {
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| 282 | int pad;
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| 283 |
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| 284 | if (ti->hpos + offs < 0 || ti->hpos + offs > ti->hnum)
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| 285 | return;
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| 286 |
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| 287 | if (ti->history[ti->hpos] != NULL) {
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| 288 | free(ti->history[ti->hpos]);
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| 289 | ti->history[ti->hpos] = NULL;
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| 290 | }
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| 291 |
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| 292 | ti->history[ti->hpos] = tinput_get_str(ti);
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| 293 | ti->hpos += offs;
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| 294 |
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| 295 | pad = ti->nc - str_length(ti->history[ti->hpos]);
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| 296 | if (pad < 0) pad = 0;
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| 297 |
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| 298 | tinput_set_str(ti, ti->history[ti->hpos]);
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| 299 | tinput_display_tail(ti, 0, pad);
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| 300 | tinput_position_caret(ti);
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| 301 | }
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| 302 |
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| 303 | static void tinput_init(tinput_t *ti)
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| 304 | {
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| 305 | ti->hnum = 0;
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| 306 | ti->hpos = 0;
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| 307 | ti->history[0] = NULL;
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| 308 | }
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| 309 |
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| 310 | static char *tinput_read(tinput_t *ti)
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| 311 | {
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| 312 | console_event_t ev;
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| 313 | char *str;
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| 314 |
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| 315 | fflush(stdout);
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| 316 |
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| 317 | if (console_get_size(fphone(stdin), &ti->con_cols, &ti->con_rows) != EOK)
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| 318 | return NULL;
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| 319 | if (console_get_pos(fphone(stdin), &ti->col0, &ti->row0) != EOK)
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| 320 | return NULL;
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| 321 |
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| 322 | ti->pos = 0;
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| 323 | ti->nc = 0;
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| 324 |
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| 325 | while (true) {
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| 326 | fflush(stdout);
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| 327 | if (!console_get_event(fphone(stdin), &ev))
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| 328 | return NULL;
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| 329 |
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| 330 | if (ev.type != KEY_PRESS)
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| 331 | continue;
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| 332 |
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| 333 | if ((ev.mods & KM_CTRL) != 0 &&
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| 334 | (ev.mods & (KM_ALT | KM_SHIFT)) == 0) {
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| 335 | switch (ev.key) {
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| 336 | case KC_LEFT:
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| 337 | tinput_seek_word(ti, seek_backward);
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| 338 | break;
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| 339 | case KC_RIGHT:
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| 340 | tinput_seek_word(ti, seek_forward);
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| 341 | break;
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| 342 | }
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| 343 | }
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| 344 |
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| 345 | if ((ev.mods & (KM_CTRL | KM_ALT | KM_SHIFT)) == 0) {
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| 346 | switch (ev.key) {
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| 347 | case KC_ENTER:
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| 348 | case KC_NENTER:
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| 349 | goto done;
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| 350 | case KC_BACKSPACE:
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| 351 | tinput_backspace(ti);
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| 352 | break;
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| 353 | case KC_DELETE:
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| 354 | tinput_delete(ti);
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| 355 | break;
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| 356 | case KC_LEFT:
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| 357 | tinput_seek_cell(ti, seek_backward);
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| 358 | break;
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| 359 | case KC_RIGHT:
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| 360 | tinput_seek_cell(ti, seek_forward);
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| 361 | break;
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| 362 | case KC_HOME:
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| 363 | tinput_seek_max(ti, seek_backward);
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| 364 | break;
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| 365 | case KC_END:
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| 366 | tinput_seek_max(ti, seek_forward);
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| 367 | break;
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| 368 | case KC_UP:
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| 369 | tinput_history_seek(ti, +1);
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| 370 | break;
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| 371 | case KC_DOWN:
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| 372 | tinput_history_seek(ti, -1);
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| 373 | break;
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| 374 | }
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| 375 | }
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| 376 |
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| 377 | if (ev.c >= ' ') {
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| 378 | tinput_insert_char(ti, ev.c);
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| 379 | }
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| 380 | }
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| 381 |
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| 382 | done:
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| 383 | putchar('\n');
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| 384 |
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| 385 | str = tinput_get_str(ti);
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| 386 | if (str_cmp(str, "") != 0)
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| 387 | tinput_history_insert(ti, str);
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| 388 |
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| 389 | ti->hpos = 0;
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| 390 |
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| 391 | return str;
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| 392 | }
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| 393 |
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| 394 | void get_input(cliuser_t *usr)
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| 395 | {
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| 396 | char *str;
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| 397 |
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| 398 | fflush(stdout);
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| 399 | console_set_style(fphone(stdout), STYLE_EMPHASIS);
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| 400 | printf("%s", usr->prompt);
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| 401 | fflush(stdout);
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| 402 | console_set_style(fphone(stdout), STYLE_NORMAL);
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| 403 |
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| 404 | str = tinput_read(&tinput);
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| 405 |
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| 406 | /* Check for empty input. */
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| 407 | if (str_cmp(str, "") == 0) {
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| 408 | free(str);
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| 409 | return;
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| 410 | }
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| 411 |
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| 412 | usr->line = str;
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| 413 | return;
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| 414 | }
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| 415 |
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| 416 | void input_init(void)
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| 417 | {
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| 418 | tinput_init(&tinput);
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| 419 | }
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