Added search functionality.
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parent
185f9a6b42
commit
d6e65a89e8
329
ascii.c
329
ascii.c
@ -35,6 +35,11 @@
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#include <string.h>
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#include <unistd.h>
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typedef enum {BROWSE_MODE, INSERT_MODE, SEARCH_MODE} Mode;
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#define DELETE_KEY 127
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#define ESCAPE_KEY 27
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// The descriptive names of the ASCII characters
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const char *NAMES[128][2] = {
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{"NUL", "null"}, // 0
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@ -81,7 +86,8 @@ static int new_colorpair(int fg, int bg)
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}
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int DECIMAL_COLORS, HEX_COLORS, CHAR_COLORS, DESCRIPTION_COLORS, OUTPUT_CHAR_COLORS,
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OUTPUT_ESCAPE_COLORS, OUTPUT_LABEL_COLORS, BROWSE_MODE_COLORS, INSERT_MODE_COLORS;
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OUTPUT_ESCAPE_COLORS, OUTPUT_LABEL_COLORS, SEARCH_BAR_COLORS, BROWSE_MODE_COLORS,
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INSERT_MODE_COLORS, SEARCH_MODE_COLORS;
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const int COL_WIDTH = 42;
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int W = 0;
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@ -158,25 +164,30 @@ static void redraw(int selected)
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last_selected = selected;
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}
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void draw_output(char *start, char *stop)
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static int find_ascii_match(int start, int fallback, int direction, char *searchbuf)
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{
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attron(OUTPUT_LABEL_COLORS);
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mvprintw(H-1, 0, " Output:");
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attroff(OUTPUT_LABEL_COLORS);
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addch(' ');
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attroff(OUTPUT_LABEL_COLORS);
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for (char *c = start; c < stop; c++) {
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if (' ' <= *c && *c <= '~') { // printable range
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printwattrs(OUTPUT_CHAR_COLORS, "%c", *c);
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} else {
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printwattrs(OUTPUT_ESCAPE_COLORS, "\\x%02X", *c);
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if (searchbuf[0] == '\0') return fallback;
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char tmp[COL_WIDTH+6];
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for (int i = 0; i <= 127; i++) {
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int c = (start + i*direction) % 128; // relative to starting point
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if (searchbuf[0] == c && searchbuf[1] == '\0')
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return c;
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// Only do full match for search strings longer than 1
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if (searchbuf[1]) {
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if (NAMES[c][1]) {
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sprintf(tmp, "%d 0x%02X 0x%02x %s %s", c, c, c, NAMES[c][0] ? NAMES[c][0] : "", NAMES[c][1]);
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} else if (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z')) {
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sprintf(tmp, "%d 0x%02X 0x%02x %s The letter %c", c, c, c, NAMES[c][0] ? NAMES[c][0] : "", c);
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} else if ('0' <= c && c <= '9') {
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sprintf(tmp, "%d 0x%02X 0x%02x %s The number %c", c, c, c, NAMES[c][0] ? NAMES[c][0] : "", c);
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} else {
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sprintf(tmp, "%d 0x%02X 0x%02x %s The %c character", c, c, c, NAMES[c][0] ? NAMES[c][0] : "", c);
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}
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if (strstr(tmp, searchbuf) != NULL)
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return c;
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}
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}
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int y, x;
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getyx(stdscr, y, x);
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// Clear to end of line
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for (int x2 = x; x2 < W; x2++) mvaddch(y, x2, ' ');
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move(y, x);
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return fallback;
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}
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int main(int argc, char *argv[])
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@ -211,8 +222,10 @@ int main(int argc, char *argv[])
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OUTPUT_CHAR_COLORS = new_colorpair(COLOR_BLACK, COLOR_WHITE) | A_BOLD;
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OUTPUT_ESCAPE_COLORS = new_colorpair(COLOR_RED, COLOR_WHITE) | A_BOLD;
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OUTPUT_LABEL_COLORS = new_colorpair(COLOR_BLACK, COLOR_YELLOW);
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SEARCH_BAR_COLORS = new_colorpair(COLOR_BLACK, COLOR_GREEN);
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BROWSE_MODE_COLORS = new_colorpair(COLOR_BLACK, COLOR_BLUE);
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INSERT_MODE_COLORS = new_colorpair(COLOR_WHITE, COLOR_RED) | A_BOLD;
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SEARCH_MODE_COLORS = new_colorpair(COLOR_WHITE, COLOR_GREEN) | A_BOLD;
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size_t chunk = 256;
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size_t buf_size = chunk, buf_i = 0;
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@ -235,6 +248,9 @@ int main(int argc, char *argv[])
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}
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}
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char searchbuf[1024] = {'\0'};
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size_t searchlen = 0;
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// If any command line args, treat them as bytes to append to
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// the output buffer
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for (int i = 1; i < argc; i++) {
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@ -246,118 +262,207 @@ int main(int argc, char *argv[])
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}
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}
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int insert_mode = 0;
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int selected = 0;
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Mode mode = BROWSE_MODE;
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int prev_selected = 0, selected = 0;
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while (1) {
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redraw(selected);
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// Title bar
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move(0,0);
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if (insert_mode) {
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const char *str = "ASCII TABLE (typing, press 'esc' to browse)";
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int spacer = W/2-strlen(str)/2;
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printwattrs(INSERT_MODE_COLORS, "%*s%s%*s", spacer, "", str, spacer+1, "");
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char *title;
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int title_colors;
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switch (mode) {
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case INSERT_MODE:
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title = "ASCII TABLE (typing, 'esc' to browse)";
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title_colors = INSERT_MODE_COLORS;
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break;
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case SEARCH_MODE:
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title = "ASCII TABLE (searching, 'esc' to browse)";
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title_colors = SEARCH_MODE_COLORS;
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break;
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case BROWSE_MODE:
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title = "ASCII TABLE (browsing, 'esc' to exit)";
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title_colors = BROWSE_MODE_COLORS;
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break;
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}
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int spacer = W/2-strlen(title)/2;
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printwattrs(title_colors, "%*s%s%*s", spacer, "", title, spacer+1, "");
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if (mode == SEARCH_MODE) {
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attron(SEARCH_BAR_COLORS);
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mvprintw(H-1, 0, " Search:");
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attroff(SEARCH_BAR_COLORS);
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addch(' ');
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printwattrs(OUTPUT_CHAR_COLORS, "%s", searchbuf);
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} else {
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const char *str = "ASCII TABLE (browsing, press 'esc' to exit)";
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int spacer = W/2-strlen(str)/2;
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printwattrs(BROWSE_MODE_COLORS, "%*s%s%*s", spacer, "", str, spacer+1, "");
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// Bar at the bottom of the screen showing the output text:
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// left-truncate output so the end of it fits on screen:
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char *visible = &outbuf[buf_i];
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for (int space = W-strlen(" Output: ")-1-5; space > 0 && visible > outbuf; visible--) {
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int chlen = (' ' <= *visible && *visible <= '~') ? 1 : 4; // printable range
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if (chlen > space) break;
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else space -= chlen;
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}
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attron(mode == INSERT_MODE ? INSERT_MODE_COLORS : OUTPUT_LABEL_COLORS);
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mvprintw(H-1, 0, " Output:");
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attroff(mode == INSERT_MODE ? INSERT_MODE_COLORS : OUTPUT_LABEL_COLORS);
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addch(' ');
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for (char *c = visible; c < &outbuf[buf_i]; c++) {
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if (' ' <= *c && *c <= '~') { // printable range
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printwattrs(OUTPUT_CHAR_COLORS, "%c", *c);
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} else {
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printwattrs(OUTPUT_ESCAPE_COLORS, "\\x%02X", *c);
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}
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}
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}
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// Bar at the bottom of the screen showing the output text:
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// left-truncate output so the end of it fits on screen:
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char *visible = &outbuf[buf_i];
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for (int space = W-strlen(" Output: ")-1-5; space > 0 && visible > outbuf; visible--) {
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int chlen = (' ' <= *visible && *visible <= '~') ? 1 : 4; // printable range
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if (chlen > space) break;
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else space -= chlen;
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}
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draw_output(visible, &outbuf[buf_i]);
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int y, x;
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getyx(stdscr, y, x);
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// Clear to end of line
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for (int x2 = x; x2 < W; x2++) mvaddch(y, x2, ' ');
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move(y, x);
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refresh();
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next_input:;
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int key = getch();
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if (insert_mode) {
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if (key == 27) {
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insert_mode = 0;
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continue;
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} else if (key == 127) {
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// Backspace
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if (buf_i > 0) buf_i--;
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continue;
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} else if (0 <= key && key < 127) {
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outbuf[buf_i++] = (char)key;
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if (buf_i >= buf_size) {
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buf_size *= 2;
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outbuf = realloc(outbuf, buf_size);
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}
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continue;
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}
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}
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switch (key) {
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case 'j': case KEY_DOWN:
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selected++;
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break;
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case 'J':
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selected += 10;
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break;
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case 'k': case KEY_UP:
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selected--;
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break;
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case 'K':
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selected -= 10;
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break;
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case 'l': case 'L': case KEY_RIGHT: case KEY_SRIGHT:
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selected += H-2;
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break;
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case 'h': case 'H': case KEY_LEFT: case KEY_SLEFT:
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selected -= H-2;
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break;
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case 'i': case 'a':
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insert_mode = 1;
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break;
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case KEY_RESIZE:
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// To prevent wasted work, wait until 200ms has elapsed
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// with no additional resizes before doing anything
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timeout(0);
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do {
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// Wait 200ms
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usleep(2e5);
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// Peek if there's another resize event
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int k = getch();
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if (k == KEY_RESIZE) continue;
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if (k > 0) ungetch(k);
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} while (0);
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// Back to blocking input
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timeout(-1);
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W = getmaxx(stdscr);
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H = getmaxy(stdscr);
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break;
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case KEY_ENTER: case '\n':
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outbuf[buf_i++] = (char)selected;
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if (buf_i >= buf_size) {
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buf_size *= 2;
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outbuf = realloc(outbuf, buf_size);
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switch (mode) {
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case INSERT_MODE:
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if (key == ESCAPE_KEY) {
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mode = BROWSE_MODE;
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} else if (key == DELETE_KEY) { // Backspace
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if (buf_i > 0) buf_i--;
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} else if (0 <= key && key < 127) {
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outbuf[buf_i++] = (char)key;
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if (buf_i >= buf_size) {
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buf_size *= 2;
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outbuf = realloc(outbuf, buf_size);
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}
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} else {
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goto next_input; // skip redraw
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}
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break;
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case KEY_BACKSPACE: case KEY_DC: case 127:
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if (buf_i > 0) buf_i--;
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case SEARCH_MODE:
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switch (key) {
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case ESCAPE_KEY: // Escape
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selected = prev_selected;
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searchbuf[0] = '\0';
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searchlen = 0;
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mode = BROWSE_MODE;
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break;
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case '\n':
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mode = BROWSE_MODE;
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break;
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case DELETE_KEY:
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if (searchlen > 0) {
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searchlen--;
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searchbuf[searchlen] = '\0';
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selected = find_ascii_match(prev_selected, prev_selected, 1, searchbuf);
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}
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break;
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default:
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if (0 <= key && key < 127) {
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if (searchlen < sizeof(searchbuf)-1) {
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searchbuf[searchlen++] = (char)key;
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searchbuf[searchlen] = '\0';
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}
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selected = find_ascii_match(prev_selected, prev_selected, 1, searchbuf);
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break;
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}
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goto next_input; // skip redraw
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}
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break;
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case 'q': case 'Q': case KEY_CANCEL: case KEY_CLOSE: case KEY_EXIT: case 27:
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endwin();
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write(STDOUT_FILENO, outbuf, buf_i);
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return 0;
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default: goto next_input;
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case BROWSE_MODE:
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switch (key) {
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case 'j': case KEY_DOWN:
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selected++;
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break;
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case 'J':
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selected += 10;
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break;
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case 'k': case KEY_UP:
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selected--;
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break;
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case 'K':
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selected -= 10;
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break;
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case 'l': case 'L': case KEY_RIGHT: case KEY_SRIGHT:
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selected += H-2;
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break;
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case 'h': case 'H': case KEY_LEFT: case KEY_SLEFT:
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selected -= H-2;
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break;
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case 'i': case 'a':
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mode = INSERT_MODE;
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prev_selected = selected;
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break;
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case '/':
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mode = SEARCH_MODE;
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searchbuf[0] = '\0';
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searchlen = 0;
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break;
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case 'n':
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selected = find_ascii_match(selected+1, selected, 1, searchbuf);
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break;
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case 'N':
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selected = find_ascii_match(selected-1, selected, -1, searchbuf);
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break;
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case KEY_RESIZE:
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// To prevent wasted work, wait until 200ms has elapsed
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// with no additional resizes before doing anything
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timeout(0);
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do {
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// Wait 200ms
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usleep(2e5);
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// Peek if there's another resize event
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int k = getch();
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if (k == KEY_RESIZE) continue;
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if (k > 0) ungetch(k);
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} while (0);
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// Back to blocking input
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timeout(-1);
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W = getmaxx(stdscr);
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H = getmaxy(stdscr);
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break;
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case KEY_ENTER: case '\n':
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outbuf[buf_i++] = (char)selected;
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if (buf_i >= buf_size) {
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buf_size *= 2;
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outbuf = realloc(outbuf, buf_size);
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}
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break;
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case KEY_BACKSPACE: case KEY_DC: case DELETE_KEY:
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if (buf_i > 0) buf_i--;
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break;
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case 'q': case 'Q': case KEY_CANCEL: case KEY_CLOSE: case KEY_EXIT: case ESCAPE_KEY:
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endwin();
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write(STDOUT_FILENO, outbuf, buf_i);
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return 0;
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default:
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goto next_input; // skip redraw
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}
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break;
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}
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if (selected < 0) selected = 0;
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if (selected >= 128) selected = 127;
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if (selected > 127) selected = 127;
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}
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endwin();
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