hexedit: implement page up/down

function                                             old     new   delta
hexedit_main                                         924     970     +46

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/miscutils/hexedit.c b/miscutils/hexedit.c
index ac38978fd147e057a2bc597ec6b0d29cf4e98bbb..a995697069e4a1b801abda0afbcdbf3cdd78a52c 100644 (file)
--- a/miscutils/hexedit.c
+++ b/miscutils/hexedit.c
@@ -236,7 +236,7 @@ int hexedit_main(int argc UNUSED_PARAM, char **argv)
        redraw();
        printf(ESC"[1;10H"); /* position on 1st hex byte in first line */
 
-//TODO: //PgUp/PgDown; Home/End: start/end of line; '<'/'>': start/end of file
+//TODO: //Home/End: start/end of line; '<'/'>': start/end of file
        //Backspace: undo
        //Enter: goto specified position
        //Ctrl-L: redraw
@@ -249,12 +249,14 @@ int hexedit_main(int argc UNUSED_PARAM, char **argv)
 
        for (;;) {
                char read_key_buffer[KEYCODE_BUFFER_SIZE];
+               unsigned cnt;
                int32_t key;
                uint8_t byte;
 
                fflush_all();
                key = read_key(STDIN_FILENO, read_key_buffer, -1);
 
+               cnt = 1;
                switch (key) {
                case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
                case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
@@ -307,7 +309,10 @@ int hexedit_main(int argc UNUSED_PARAM, char **argv)
                                putchar(' ');
                        }
                        break;
+               case KEYCODE_PAGEDOWN:
+                       cnt = G.height;
                case KEYCODE_DOWN:
+ k_down:
                        G.current_byte += 16;
                        if (G.current_byte >= G.eof_byte) {
                                move_mapping_further();
@@ -324,6 +329,8 @@ int hexedit_main(int argc UNUSED_PARAM, char **argv)
                                row--;
                                redraw_cur_line();
                        }
+                       if (--cnt)
+                               goto k_down;
                        break;
 
                case KEYCODE_LEFT:
@@ -348,7 +355,10 @@ int hexedit_main(int argc UNUSED_PARAM, char **argv)
                        G.current_byte--;
                        printf(ESC"[2D");
                        break;
+               case KEYCODE_PAGEUP:
+                       cnt = G.height;
                case KEYCODE_UP:
+ k_up:
                        if ((G.current_byte - G.addr) < 16) {
                                move_mapping_lower();
                                if ((G.current_byte - G.addr) < 16)
@@ -364,6 +374,8 @@ int hexedit_main(int argc UNUSED_PARAM, char **argv)
                                printf(ESC"M"); /* scroll up */
                                redraw_cur_line();
                        }
+                       if (--cnt)
+                               goto k_up;
                        break;
                }
        }