+/*
+ * Copyright (C) 2009 Sony Computer Entertainment Inc.
+ * Copyright 2009 Sony Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#define _GNU_SOURCE
+
+#include <assert.h>
+#include <string.h>
+
+#include "log/log.h"
+#include "talloc/talloc.h"
+#include "nc-boot-editor.h"
+
+static struct boot_editor *boot_editor_from_scr(struct nc_scr *scr)
+{
+ struct boot_editor *boot_editor;
+
+ assert(scr->sig == pb_boot_editor_sig);
+ boot_editor = (struct boot_editor *)
+ ((char *)scr - (size_t)&((struct boot_editor *)0)->scr);
+ assert(boot_editor->scr.sig == pb_boot_editor_sig);
+ return boot_editor;
+}
+
+static struct boot_editor *boot_editor_from_arg(void *arg)
+{
+ struct boot_editor *boot_editor = arg;
+
+ assert(boot_editor->scr.sig == pb_boot_editor_sig);
+ return boot_editor;
+}
+
+/**
+ * boot_editor_move_cursor - Move the cursor, setting correct attributes.
+ * @req: An ncurses request or char to send to form_driver().
+ */
+
+static int boot_editor_move_cursor(struct boot_editor *boot_editor, int req)
+{
+ int result;
+
+ wchgat(boot_editor->scr.sub_ncw, 1,
+ boot_editor_attr_field_selected, 0, 0);
+ result = form_driver(boot_editor->ncf, req);
+ wchgat(boot_editor->scr.sub_ncw, 1, boot_editor->attr_cursor, 0, 0);
+ wrefresh(boot_editor->scr.main_ncw);
+ return result;
+}
+
+/**
+ * boot_editor_insert_mode_set - Set the insert mode.
+ */
+
+static void boot_editor_insert_mode_set(struct boot_editor *boot_editor,
+ int req)
+{
+ switch (req) {
+ case REQ_INS_MODE:
+ boot_editor->attr_cursor = boot_editor_attr_cursor_ins;
+ break;
+ case REQ_OVL_MODE:
+ boot_editor->attr_cursor = boot_editor_attr_cursor_ovl;
+ break;
+ default:
+ assert(0 && "bad req");
+ break;
+ }
+ boot_editor_move_cursor(boot_editor, req);
+}
+
+/**
+ * boot_editor_insert_mode_tog - Toggle the insert mode.
+ */
+
+static void boot_editor_insert_mode_tog(struct boot_editor *boot_editor)
+{
+ if (boot_editor->attr_cursor == boot_editor_attr_cursor_ins)
+ boot_editor_insert_mode_set(boot_editor, REQ_OVL_MODE);
+ else
+ boot_editor_insert_mode_set(boot_editor, REQ_INS_MODE);
+}
+
+/**
+ * boot_editor_move_field - Move selected field, setting correct attributes.
+ * @req: An ncurses request to send to form_driver().
+ */
+
+static int boot_editor_move_field(struct boot_editor *boot_editor, int req)
+{
+ int result;
+
+ set_field_back(current_field(boot_editor->ncf),
+ boot_editor_attr_field_normal);
+
+ result = form_driver(boot_editor->ncf, req);
+
+ set_field_back(current_field(boot_editor->ncf),
+ boot_editor_attr_field_selected);
+
+ boot_editor_move_cursor(boot_editor, REQ_END_FIELD);
+ return result;
+}
+
+static int boot_editor_post(struct nc_scr *scr)
+{
+ struct boot_editor *boot_editor = boot_editor_from_scr(scr);
+
+ post_form(boot_editor->ncf);
+
+ nc_scr_frame_draw(scr);
+ boot_editor_move_field(boot_editor, REQ_FIRST_FIELD);
+ boot_editor_move_field(boot_editor, REQ_END_FIELD);
+ boot_editor_insert_mode_set(boot_editor, REQ_INS_MODE);
+
+ redrawwin(boot_editor->scr.main_ncw);
+ wrefresh(boot_editor->scr.main_ncw);
+
+ return 0;
+}
+
+static int boot_editor_unpost(struct nc_scr *scr)
+{
+ return unpost_form(boot_editor_from_scr(scr)->ncf);
+}
+
+static void boot_editor_resize(struct nc_scr *scr)
+{
+ /* FIXME: forms can't be resized, need to recreate here */
+ boot_editor_unpost(scr);
+ boot_editor_post(scr);
+}
+
+/**
+ * boot_editor_chomp - Eat leading and trailing WS.
+ */
+
+static char *boot_editor_chomp(char *s)
+{
+ char *start;
+ char *end;
+ char *const s_end = s + strlen(s);
+
+ for (; s < s_end; s++)
+ if (*s != ' ' && *s != '\t')
+ break;
+
+ start = end = s;
+
+ for (; s < s_end; s++)
+ if (*s != ' ' && *s != '\t')
+ end = s;
+ *(end + 1) = 0;
+ return start;
+}
+
+static struct pb_kexec_data *boot_editor_prepare_data(
+ struct boot_editor *boot_editor)
+{
+ struct pb_kexec_data *kd;
+ char *s;
+
+ kd = talloc(boot_editor, struct pb_kexec_data);
+
+ if (!kd)
+ return NULL;
+
+ s = boot_editor_chomp(field_buffer(boot_editor->fields[0], 0));
+ kd->image = *s ? talloc_strdup(kd, s) : NULL;
+
+ s = boot_editor_chomp(field_buffer(boot_editor->fields[1], 0));
+ kd->initrd = *s ? talloc_strdup(kd, s) : NULL;
+
+ s = boot_editor_chomp(field_buffer(boot_editor->fields[2], 0));
+ kd->args = *s ? talloc_strdup(kd, s) : NULL;
+
+ return kd;
+}
+
+/**
+ * boot_editor_process_key - Process a user keystroke.
+ *
+ * Called from the cui via the scr:process_key method.
+ */
+
+static void boot_editor_process_key(struct nc_scr *scr)
+{
+ struct boot_editor *boot_editor = boot_editor_from_scr(scr);
+ struct pb_kexec_data *kd;
+
+ while (1) {
+ int c = getch();
+
+ if (c == ERR)
+ return;
+
+ /* DBGS("%d (%o)\n", c, c); */
+
+ switch (c) {
+ default:
+ boot_editor_move_cursor(boot_editor, c);
+ break;
+
+ /* hot keys */
+ case 27: /* ESC */
+ boot_editor->on_exit(boot_editor,
+ boot_editor_cancel, NULL);
+ nc_flush_keys();
+ return;
+ case '\n':
+ case '\r':
+ form_driver(boot_editor->ncf, REQ_VALIDATION);
+ kd = boot_editor_prepare_data(boot_editor);
+ boot_editor->on_exit(boot_editor,
+ boot_editor_update, kd);
+ nc_flush_keys();
+ return;
+
+ /* insert mode */
+ case KEY_IC:
+ boot_editor_insert_mode_tog(boot_editor);
+ break;
+
+ /* form nav */
+ case KEY_PPAGE:
+ boot_editor_move_field(boot_editor, REQ_FIRST_FIELD);
+ break;
+ case KEY_NPAGE:
+ boot_editor_move_field(boot_editor, REQ_LAST_FIELD);
+ break;
+ case KEY_DOWN:
+ boot_editor_move_field(boot_editor, REQ_NEXT_FIELD);
+ break;
+ case KEY_UP:
+ boot_editor_move_field(boot_editor, REQ_PREV_FIELD);
+ break;
+
+ /* field nav */
+ case KEY_HOME:
+ boot_editor_move_cursor(boot_editor, REQ_BEG_FIELD);
+ break;
+ case KEY_END:
+ boot_editor_move_cursor(boot_editor, REQ_END_FIELD);
+ break;
+ case KEY_LEFT:
+ boot_editor_move_cursor(boot_editor, REQ_LEFT_CHAR);
+ break;
+ case KEY_RIGHT:
+ boot_editor_move_cursor(boot_editor, REQ_RIGHT_CHAR);
+ break;
+ case KEY_BACKSPACE:
+ if (boot_editor_move_cursor(boot_editor, REQ_LEFT_CHAR)
+ == E_OK)
+ boot_editor_move_cursor(boot_editor,
+ REQ_DEL_CHAR);
+ break;
+ case KEY_DC:
+ boot_editor_move_cursor(boot_editor, REQ_DEL_CHAR);
+ break;
+ }
+ }
+}
+
+/**
+ * boot_editor_destructor - The talloc destructor for a boot_editor.
+ */
+
+static int boot_editor_destructor(void *arg)
+{
+ struct boot_editor *boot_editor = boot_editor_from_arg(arg);
+ FIELD **f;
+
+ for (f = boot_editor->fields; *f; f++)
+ free_field(*f);
+
+ free_form(boot_editor->ncf);
+ boot_editor->scr.sig = pb_removed_sig;
+
+ return 0;
+}
+
+static FIELD *boot_editor_setup_field(unsigned int y, unsigned int x, char *str)
+{
+ FIELD *f;
+
+ f = new_field(1, COLS - 1 - x, y, x, 0, 0);
+ field_opts_off(f, O_STATIC | O_WRAP);
+ set_max_field(f, 256);
+ set_field_buffer(f, 0, str);
+ set_field_status(f, 0);
+ return f;
+}
+
+static FIELD *boot_editor_setup_label(unsigned int y, unsigned int x, char *str)
+{
+ FIELD *f;
+
+ f = new_field(1, strlen(str), y, x, 0, 0);
+ field_opts_off(f, O_ACTIVE);
+ set_field_buffer(f, 0, str);
+ return f;
+}
+
+struct boot_editor *boot_editor_init(void *ui_ctx,
+ const struct pb_kexec_data *kd,
+ void (*on_exit)(struct boot_editor *,
+ enum boot_editor_result,
+ struct pb_kexec_data *))
+{
+ struct boot_editor *boot_editor;
+
+ pb_log("%s: image: '%s'\n", __func__, kd->image);
+ pb_log("%s: initrd: '%s'\n", __func__, kd->initrd);
+ pb_log("%s: args: '%s'\n", __func__, kd->args);
+
+ assert(on_exit);
+
+ boot_editor = talloc_zero(ui_ctx, struct boot_editor);
+
+ if (!boot_editor)
+ return NULL;
+
+ talloc_set_destructor(boot_editor, boot_editor_destructor);
+
+ nc_scr_init(&boot_editor->scr, pb_boot_editor_sig, 0,
+ ui_ctx, boot_editor_process_key,
+ boot_editor_post, boot_editor_unpost, boot_editor_resize);
+
+ boot_editor->scr.frame.title = talloc_strdup(boot_editor,
+ "Petitboot Option Editor");
+ boot_editor->scr.frame.help = talloc_strdup(boot_editor,
+ "ESC=cancel, Enter=accept");
+
+ boot_editor->on_exit = on_exit;
+
+ boot_editor->fields = talloc_array(boot_editor, FIELD *, 7);
+
+ boot_editor->fields[0] = boot_editor_setup_field(0, 9, kd->image);
+ boot_editor->fields[1] = boot_editor_setup_field(1, 9, kd->initrd);
+ boot_editor->fields[2] = boot_editor_setup_field(2, 9, kd->args);
+ boot_editor->fields[3] = boot_editor_setup_label(0, 1, "image:");
+ boot_editor->fields[4] = boot_editor_setup_label(1, 1, "initrd:");
+ boot_editor->fields[5] = boot_editor_setup_label(2, 1, "args:");
+ boot_editor->fields[6] = NULL;
+
+ boot_editor->ncf = new_form(boot_editor->fields);
+
+ set_form_win(boot_editor->ncf, boot_editor->scr.main_ncw);
+ set_form_sub(boot_editor->ncf, boot_editor->scr.sub_ncw);
+
+ return boot_editor;
+}
projects / petitboot / commitdiff