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vi: nuke FEATURE_VI_OPTIMIZE_CURSOR
It is not Unicode safe, it is not saving much of I/O, and it's large: function old new delta vi_main 255 253 -2 go_bottom_and_clear_to_eol 28 26 -2 do_cmd 4194 4182 -12 show_status_line 388 374 -14 strncat 39 - -39 __GI_strncat 39 - -39 refresh 774 724 -50 place_cursor 276 83 -193 ------------------------------------------------------------------------------ (add/remove: 0/3 grow/shrink: 0/6 up/down: 0/-351) Total: -351 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
4125a6b630
commit
04b52892ed
182
editors/vi.c
182
editors/vi.c
@ -136,14 +136,6 @@
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//config: cursor position using "ESC [ 6 n" escape sequence, then read stdin.
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//config:
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//config: This is not clean but helps a lot on serial lines and such.
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//config:
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//config:config FEATURE_VI_OPTIMIZE_CURSOR
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//config: bool "Optimize cursor movement"
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//config: default y
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//config: depends on VI
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//config: help
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//config: This will make the cursor movement faster, but requires more memory
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//config: and it makes the applet a tiny bit larger.
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//applet:IF_VI(APPLET(vi, BB_DIR_BIN, BB_SUID_DROP))
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@ -202,20 +194,29 @@ enum {
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MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
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};
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/* vt102 typical ESC sequence */
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/* terminal standout start/normal ESC sequence */
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#define SOs "\033[7m"
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#define SOn "\033[0m"
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/* terminal bell sequence */
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#define bell "\007"
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/* Clear-end-of-line and Clear-end-of-screen ESC sequence */
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#define Ceol "\033[K"
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#define Ceos "\033[J"
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/* Cursor motion arbitrary destination ESC sequence */
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#define CMrc "\033[%u;%uH"
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/* Cursor motion up and down ESC sequence */
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#define CMup "\033[A"
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#define CMdown "\n"
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/* VT102 ESC sequences.
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* See "Xterm Control Sequences"
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* http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
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*/
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/* Inverse/Normal text */
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#define ESC_BOLD_TEXT "\033[7m"
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#define ESC_NORM_TEXT "\033[0m"
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/* Bell */
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#define ESC_BELL "\007"
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/* Clear-to-end-of-line */
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#define ESC_CLEAR2EOL "\033[K"
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/* Clear-to-end-of-screen.
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* (We use default param here.
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* Full sequence is "ESC [ <num> J",
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* <num> is 0/1/2 = "erase below/above/all".)
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*/
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#define ESC_CLEAR2EOS "\033[J"
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/* Cursor to given coordinate (1,1: top left) */
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#define ESC_SET_CURSOR_POS "\033[%u;%uH"
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//UNUSED
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///* Cursor up and down */
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//#define ESC_CURSOR_UP "\033[A"
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//#define ESC_CURSOR_DOWN "\n"
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#if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
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// cmds modifying text[]
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@ -303,9 +304,6 @@ struct globals {
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int lmc_len; // length of last_modifying_cmd
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char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
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#endif
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#if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
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int last_row; // where the cursor was last moved to
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#endif
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#if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
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int my_pid;
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#endif
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@ -389,7 +387,6 @@ struct globals {
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#define lmc_len (G.lmc_len )
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#define ioq (G.ioq )
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#define ioq_start (G.ioq_start )
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#define last_row (G.last_row )
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#define my_pid (G.my_pid )
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#define last_search_pattern (G.last_search_pattern)
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@ -470,10 +467,7 @@ static int file_size(const char *); // what is the byte size of "fn"
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// file_insert might reallocate text[]!
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static int file_insert(const char *, char *, int);
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static int file_write(char *, char *, char *);
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#if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
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#define place_cursor(a, b, optimize) place_cursor(a, b)
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#endif
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static void place_cursor(int, int, int);
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static void place_cursor(int, int);
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static void screen_erase(void);
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static void clear_to_eol(void);
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static void clear_to_eos(void);
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@ -600,10 +594,10 @@ int vi_main(int argc, char **argv)
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// The argv array can be used by the ":next" and ":rewind" commands
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argv += optind;
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argc -= optind;
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save_argc = argc;
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optind = 0;
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//----- This is the main file handling loop --------------
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save_argc = argc;
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optind = 0;
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while (1) {
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edit_file(argv[optind]); /* param might be NULL */
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if (++optind >= argc)
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@ -2593,107 +2587,56 @@ static int file_write(char *fn, char *first, char *last)
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// 23,0 ... 23,79 <- status line
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//----- Move the cursor to row x col (count from 0, not 1) -------
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static void place_cursor(int row, int col, int optimize)
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static void place_cursor(int row, int col)
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{
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char cm1[sizeof(CMrc) + sizeof(int)*3 * 2];
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#if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
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enum {
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SZ_UP = sizeof(CMup),
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SZ_DN = sizeof(CMdown),
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SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN,
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};
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char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size
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#endif
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char *cm;
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char cm1[sizeof(ESC_SET_CURSOR_POS) + sizeof(int)*3 * 2];
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if (row < 0) row = 0;
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if (row >= rows) row = rows - 1;
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if (col < 0) col = 0;
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if (col >= columns) col = columns - 1;
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//----- 1. Try the standard terminal ESC sequence
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sprintf(cm1, CMrc, row + 1, col + 1);
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cm = cm1;
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#if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
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if (optimize && col < 16) {
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char *screenp;
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int Rrow = last_row;
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int diff = Rrow - row;
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if (diff < -5 || diff > 5)
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goto skip;
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//----- find the minimum # of chars to move cursor -------------
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//----- 2. Try moving with discreet chars (Newline, [back]space, ...)
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cm2[0] = '\0';
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// move to the correct row
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while (row < Rrow) {
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// the cursor has to move up
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strcat(cm2, CMup);
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Rrow--;
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}
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while (row > Rrow) {
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// the cursor has to move down
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strcat(cm2, CMdown);
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Rrow++;
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}
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// now move to the correct column
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strcat(cm2, "\r"); // start at col 0
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// just send out orignal source char to get to correct place
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screenp = &screen[row * columns]; // start of screen line
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strncat(cm2, screenp, col);
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// pick the shortest cursor motion to send out
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if (strlen(cm2) < strlen(cm)) {
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cm = cm2;
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}
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skip: ;
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}
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last_row = row;
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#endif /* FEATURE_VI_OPTIMIZE_CURSOR */
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write1(cm);
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sprintf(cm1, ESC_SET_CURSOR_POS, row + 1, col + 1);
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write1(cm1);
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}
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//----- Erase from cursor to end of line -----------------------
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static void clear_to_eol(void)
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{
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write1(Ceol); // Erase from cursor to end of line
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write1(ESC_CLEAR2EOL);
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}
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static void go_bottom_and_clear_to_eol(void)
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{
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place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
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clear_to_eol(); // erase to end of line
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place_cursor(rows - 1, 0);
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clear_to_eol();
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}
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//----- Erase from cursor to end of screen -----------------------
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static void clear_to_eos(void)
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{
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write1(Ceos); // Erase from cursor to end of screen
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write1(ESC_CLEAR2EOS);
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}
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//----- Start standout mode ------------------------------------
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static void standout_start(void) // send "start reverse video" sequence
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static void standout_start(void)
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{
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write1(SOs); // Start reverse video mode
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write1(ESC_BOLD_TEXT);
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}
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//----- End standout mode --------------------------------------
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static void standout_end(void) // send "end reverse video" sequence
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static void standout_end(void)
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{
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write1(SOn); // End reverse video mode
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write1(ESC_NORM_TEXT);
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}
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//----- Flash the screen --------------------------------------
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static void flash(int h)
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{
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standout_start(); // send "start reverse video" sequence
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standout_start();
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redraw(TRUE);
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mysleep(h);
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standout_end(); // send "end reverse video" sequence
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standout_end();
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redraw(TRUE);
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}
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@ -2704,7 +2647,7 @@ static void Indicate_Error(void)
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return; // generate a random command
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#endif
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if (!err_method) {
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write1(bell); // send out a bell character
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write1(ESC_BELL);
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} else {
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flash(10);
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}
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@ -2750,7 +2693,7 @@ static void show_status_line(void)
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}
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have_status_msg = 0;
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}
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place_cursor(crow, ccol, FALSE); // put cursor back in correct place
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place_cursor(crow, ccol); // put cursor back in correct place
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}
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fflush_all();
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}
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@ -2762,12 +2705,12 @@ static void status_line_bold(const char *format, ...)
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va_list args;
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va_start(args, format);
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strcpy(status_buffer, SOs); // Terminal standout mode on
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vsprintf(status_buffer + sizeof(SOs)-1, format, args);
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strcat(status_buffer, SOn); // Terminal standout mode off
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strcpy(status_buffer, ESC_BOLD_TEXT);
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vsprintf(status_buffer + sizeof(ESC_BOLD_TEXT)-1, format, args);
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strcat(status_buffer, ESC_NORM_TEXT);
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va_end(args);
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have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
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have_status_msg = 1 + sizeof(ESC_BOLD_TEXT) + sizeof(ESC_NORM_TEXT) - 2;
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}
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// format status buffer
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@ -2799,8 +2742,8 @@ static void print_literal(char *buf, const char *s)
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c = *s;
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c_is_no_print = (c & 0x80) && !Isprint(c);
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if (c_is_no_print) {
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strcpy(d, SOn);
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d += sizeof(SOn)-1;
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strcpy(d, ESC_NORM_TEXT);
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d += sizeof(ESC_NORM_TEXT)-1;
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c = '.';
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}
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if (c < ' ' || c == 0x7f) {
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@ -2812,8 +2755,8 @@ static void print_literal(char *buf, const char *s)
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*d++ = c;
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*d = '\0';
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if (c_is_no_print) {
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strcpy(d, SOs);
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d += sizeof(SOs)-1;
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strcpy(d, ESC_BOLD_TEXT);
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d += sizeof(ESC_BOLD_TEXT)-1;
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}
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if (*s == '\n') {
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*d++ = '$';
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@ -2895,8 +2838,8 @@ static int format_edit_status(void)
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//----- Force refresh of all Lines -----------------------------
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static void redraw(int full_screen)
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{
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place_cursor(0, 0, FALSE); // put cursor in correct place
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clear_to_eos(); // tell terminal to erase display
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place_cursor(0, 0);
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clear_to_eos();
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screen_erase(); // erase the internal screen buffer
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last_status_cksum = 0; // force status update
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refresh(full_screen); // this will redraw the entire display
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@ -3036,22 +2979,13 @@ static void refresh(int full_screen)
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if (changed) {
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// copy changed part of buffer to virtual screen
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memcpy(sp+cs, out_buf+cs, ce-cs+1);
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// move cursor to column of first change
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//if (offset != old_offset) {
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// // place_cursor is still too stupid
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// // to handle offsets correctly
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// place_cursor(li, cs, FALSE);
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//} else {
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place_cursor(li, cs, TRUE);
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//}
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place_cursor(li, cs);
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// write line out to terminal
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fwrite(&sp[cs], ce - cs + 1, 1, stdout);
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}
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}
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place_cursor(crow, ccol, TRUE);
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place_cursor(crow, ccol);
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old_offset = offset;
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#undef old_offset
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@ -3221,9 +3155,9 @@ static void do_cmd(int c)
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break;
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case 12: // ctrl-L force redraw whole screen
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case 18: // ctrl-R force redraw
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place_cursor(0, 0, FALSE); // put cursor in correct place
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clear_to_eos(); // tel terminal to erase display
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mysleep(10);
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place_cursor(0, 0);
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clear_to_eos();
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//mysleep(10); // why???
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screen_erase(); // erase the internal screen buffer
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last_status_cksum = 0; // force status update
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refresh(TRUE); // this will redraw the entire display
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@ -4142,7 +4076,7 @@ static void crash_test()
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if (msg[0]) {
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printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
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totalcmds, last_input_char, msg, SOs, SOn);
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totalcmds, last_input_char, msg, ESC_BOLD_TEXT, ESC_NORM_TEXT);
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fflush_all();
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while (safe_read(STDIN_FILENO, d, 1) > 0) {
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if (d[0] == '\n' || d[0] == '\r')
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