This patch prototypes isearch functionality for mconf based on an idea of Sam Ravnborg: * mconf now distinguishes if the focus is on the menu items or the buttons below it. * At startup focus is on the menu items and alphanumeric characters or space entered are used to form a string that is searched for. * BACKSPACE is used to remove the last character of the search string. * ENTER can be used to enter a submenu. * Horizontal arrow keys put focus on the buttons with the known behavior. * The TAB key is now exclusively used to toggle the focus. * Vertical arrow keys work anywhere. * When the focus is on the buttons, all keys (e.g. hotkeys) work the same as before this change. * '\' can be used to search for other occurences of an already entered string. * To use y|n|m on an item, focus has to be on the buttons. An example to navigate into the USB support menu under Device Drivers: 1) de # Navigates to the item "Device Drivers" 2) ENTER # Enter the submenu 3) USB # Navigate to the item "USB support" 4) ENTER # Enter the submenu --- scripts/kconfig/lxdialog/dialog.h | 3 + scripts/kconfig/lxdialog/menubox.c | 207 +++++++++++++++++++++++++++++++++---- 2 files changed, 189 insertions(+), 21 deletions(-) diff --git a/scripts/kconfig/lxdialog/dialog.h b/scripts/kconfig/lxdialog/dialog.h index 0b00be5abaa6..02b036435919 100644 --- a/scripts/kconfig/lxdialog/dialog.h +++ b/scripts/kconfig/lxdialog/dialog.h @@ -50,6 +50,8 @@ #define TR(params) _tracef params #define KEY_ESC 27 +#define KEY_CTRL_S 19 +#define KEY_ENTR 10 #define TAB 9 #define MAX_LEN 2048 #define BUF_SIZE (10*1024) @@ -238,6 +240,7 @@ int dialog_checklist(const char *title, const char *prompt, int height, int width, int list_height); int dialog_inputbox(const char *title, const char *prompt, int height, int width, const char *init); +int do_isearch(char *str, int choice, int scroll); /* * This is the base for fictitious keys, which activate diff --git a/scripts/kconfig/lxdialog/menubox.c b/scripts/kconfig/lxdialog/menubox.c index d70cab36137e..e49280115b52 100644 --- a/scripts/kconfig/lxdialog/menubox.c +++ b/scripts/kconfig/lxdialog/menubox.c @@ -56,10 +56,17 @@ * fscanf would read in 'scroll', and eventually that value would get used. */ +#include <string.h> #include "dialog.h" +#define ISEARCH_LEN 32 +#define ISEARCH_INDICATOR_LEN (ISEARCH_LEN + 8) +static char isearch_str[ISEARCH_LEN] = ""; + static int menu_width, item_x; +static int focus_on_buttons; + /* * Print menu item */ @@ -85,7 +92,10 @@ static void do_print_item(WINDOW * win, const char *item, int line_y, #else wclrtoeol(win); #endif - wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr); + if (focus_on_buttons) + wattrset(win, selected ? A_UNDERLINE : dlg.item.atr); + else + wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr); mvwaddstr(win, line_y, item_x, menu_item); if (hotkey) { wattrset(win, selected ? dlg.tag_key_selected.atr @@ -105,6 +115,32 @@ do { \ do_print_item(menu, item_str(), choice, selected, !item_is_tag(':')); \ } while (0) + +/* +* Print the isearch indicator. +*/ +static void print_isearch(WINDOW * win, int y, int x, int height, bool isearch) +{ + unsigned char i = 0; + + wmove(win, y, x); + + y = y + height + 1; + wmove(win, y, x); + + if (isearch) { + wattrset(win, dlg.button_key_inactive.atr); + waddstr(win, "isearch: "); + waddstr(win, isearch_str); + i = ISEARCH_INDICATOR_LEN - strlen(isearch_str); + } + + wattrset(win, dlg.menubox_border.atr); + + for ( ; i < ISEARCH_INDICATOR_LEN; i++ ) + waddch(win, ACS_HLINE); +} + /* * Print the scroll indicators. */ @@ -157,6 +193,9 @@ static void print_buttons(WINDOW * win, int height, int width, int selected) int x = width / 2 - 28; int y = height - 2; + if (!focus_on_buttons) + selected = -1; + print_button(win, "Select", y, x, selected == 0); print_button(win, " Exit ", y, x + 12, selected == 1); print_button(win, " Help ", y, x + 24, selected == 2); @@ -178,6 +217,32 @@ static void do_scroll(WINDOW *win, int *scroll, int n) wrefresh(win); } +/* + * Incremental search for text in dialog menu entries. + * The search operates as a ring search, continuing at the top after + * the last entry has been visited. + * + * Returned is -1 if no match was found, else the absolute index of + * the matching item. + */ +int do_isearch(char *str, int choice, int scroll) +{ + int found = 0; + int i; + + for (i = 0; i < item_count(); i++) { + item_set((choice + scroll + i)%item_count()); + if (strcasestr(item_str(), str)) { + found = 1; + break; + } + } + + if (found) + return (choice + scroll + i)%item_count(); + return -1; +} + /* * Display a menu for choosing among a number of options */ @@ -275,6 +340,7 @@ int dialog_menu(const char *title, const char *prompt, print_arrows(dialog, item_count(), scroll, box_y, box_x + item_x + 1, menu_height); + print_isearch(dialog, box_y, box_x + item_x + 5, menu_height, !focus_on_buttons); print_buttons(dialog, height, width, 0); wmove(menu, choice, item_x + 1); wrefresh(menu); @@ -285,22 +351,27 @@ int dialog_menu(const char *title, const char *prompt, if (key < 256 && isalpha(key)) key = tolower(key); - if (strchr("ynmh", key)) - i = max_choice; - else { - for (i = choice + 1; i < max_choice; i++) { - item_set(scroll + i); - j = first_alpha(item_str(), "YyNnMmHh"); - if (key == tolower(item_str()[j])) - break; - } - if (i == max_choice) - for (i = 0; i < max_choice; i++) { + if (focus_on_buttons) { + /* + * Find item matching hot key. + */ + if (strchr("ynmh", key)) + i = max_choice; + else { + for (i = choice + 1; i < max_choice; i++) { item_set(scroll + i); j = first_alpha(item_str(), "YyNnMmHh"); if (key == tolower(item_str()[j])) break; } + if (i == max_choice) + for (i = 0; i < max_choice; i++) { + item_set(scroll + i); + j = first_alpha(item_str(), "YyNnMmHh"); + if (key == tolower(item_str()[j])) + break; + } + } } if (item_count() != 0 && @@ -370,16 +441,117 @@ int dialog_menu(const char *title, const char *prompt, continue; /* wait for another key press */ } + if (!focus_on_buttons) { + i = -1; + + if (key == '\n') { + /* save scroll info */ + *s_scroll = scroll; + delwin(menu); + delwin(dialog); + item_set(scroll + choice); + item_set_selected(1); + isearch_str[0] = '\0'; + return 0; /* 0 means first button "Select" */ + } + + if ( key == KEY_BACKSPACE && isearch_str[0] ) { + isearch_str[i = (strlen(isearch_str) - 1)] = '\0'; + i = -1; + } + + if (key < 256 && (isalnum(key) || key == ' ')) { + if (strlen(isearch_str) < ISEARCH_LEN - 1) { + isearch_str[i = strlen(isearch_str)] = key; + isearch_str[i+1] = '\0'; + } + + /* Remove highligt of current item */ + print_item(scroll + choice, choice, FALSE); + i = do_isearch(isearch_str, choice, scroll); + } + + if (key == '\\') { + /* Remove highligt of current item */ + print_item(scroll + choice, choice, FALSE); + i = do_isearch(isearch_str, choice + 1, scroll); + } + + /* + * Handle matches + */ + if (i >= 0) { + i -= scroll; + + if (i >= max_choice) + /* + * Handle matches below the currently visible menu entries. + */ + while (i >= max_choice) { + do_scroll(menu, &scroll, 1); + i--; + print_item(max_choice + scroll - 1, max_choice - 1, false); + } + else if (i < 0) + /* + * Handle matches higher in the menu (ring search). + */ + while (i < 0) { + do_scroll(menu, &scroll, -1); + i++; + print_item(scroll, 0, false); + } + choice = i; + } else { + i = choice; + goto a; + } + + print_item(scroll + choice, choice, TRUE); + print_isearch(dialog, box_y, box_x + item_x + 5, menu_height, true); + print_arrows(dialog, item_count(), scroll, + box_y, box_x + item_x + 1, menu_height); + + wnoutrefresh(dialog); + wrefresh(menu); + i = max_choice; + continue; + } + a: switch (key) { - case KEY_LEFT: case TAB: + focus_on_buttons = 1 - focus_on_buttons; + print_isearch(dialog, box_y, box_x + item_x + 5, menu_height, !focus_on_buttons); + + print_item(scroll + choice, choice, TRUE); + print_buttons(dialog, height, width, button); + wrefresh(menu); + break; + case KEY_LEFT: case KEY_RIGHT: + focus_on_buttons = 1; button = ((key == KEY_LEFT ? --button : ++button) < 0) ? 4 : (button > 4 ? 0 : button); + print_isearch(dialog, box_y, box_x + item_x + 5, menu_height, !focus_on_buttons); + print_item(scroll + choice, choice, TRUE); print_buttons(dialog, height, width, button); wrefresh(menu); break; + case KEY_ESC: + key = on_key_esc(menu); + break; + case KEY_RESIZE: + on_key_resize(); + delwin(menu); + delwin(dialog); + goto do_resize; + } + + /* + * Focus is on buttons, handle keys appropriately + */ + switch (key) { case ' ': case 's': case 'y': @@ -390,6 +562,7 @@ int dialog_menu(const char *title, const char *prompt, case '?': case 'z': case '\n': + isearch_str[0] = '\0'; /* save scroll info */ *s_scroll = scroll; delwin(menu); @@ -421,14 +594,6 @@ int dialog_menu(const char *title, const char *prompt, case 'x': key = KEY_ESC; break; - case KEY_ESC: - key = on_key_esc(menu); - break; - case KEY_RESIZE: - on_key_resize(); - delwin(menu); - delwin(dialog); - goto do_resize; } } delwin(menu); -- 2.16.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html