Added insert mode, for faster typing onto input.

README.md

@@ -11,7 +11,9 @@ passed as arguments.
 
 ## Controls
 In the ASCII table viewer, you can navigate with arrow keys or h/j/k/l.
-Pressing `enter` will append to the output buffer and `backspace` will delete
+Pressing `enter` will append the selected character to the output buffer and
-from the output buffer. Pressing `q` or `escape` will exit and print the output
+`backspace` will delete from the output buffer. Pressing `i` will enter insert
+mode, where you can type freely into the output buffer, pressing `escape` will
+leave insert mode. Pressing `q` or `escape` will exit and print the output
 buffer to stdout. Hitting control-c will quit without printing the output
 buffer.

ascii.c

@@ -81,7 +81,7 @@ static int new_colorpair(int fg, int bg)
 }
 
 int DECIMAL_COLORS, HEX_COLORS, CHAR_COLORS, DESCRIPTION_COLORS, OUTPUT_CHAR_COLORS,
-    OUTPUT_ESCAPE_COLORS, OUTPUT_LABEL_COLORS;
+    OUTPUT_ESCAPE_COLORS, OUTPUT_LABEL_COLORS, BROWSE_MODE_COLORS, INSERT_MODE_COLORS;
 
 const int COL_WIDTH = 42;
 int W = 0;
@@ -103,8 +103,8 @@ static inline void shift(int dy, int dx) {
 }
 
 #define printwattrs(_attrs, ...) \
-    { char _buf[COL_WIDTH+1];\
+    { char _buf[W+1];\
-    chtype _bufch[COL_WIDTH+1];\
+    chtype _bufch[W+1];\
     sprintf(_buf, __VA_ARGS__);\
     for (int i = 0; i == 0 || _buf[i-1]; i++) _bufch[i] = _buf[i] | _attrs;\
     addchstr(_bufch);\
@@ -114,9 +114,9 @@ static inline void shift(int dy, int dx) {
 // Draw the information for one character
 static inline void draw_entry(int i, int scrollx, int attrs)
 {
-    int x = (i / (H-1)) * COL_WIDTH - scrollx;
+    int x = (i / (H-2)) * COL_WIDTH - scrollx;
     if (x > W || x < 0) return;
-    int y = i % (H-1);
+    int y = (i % (H-2)) + 1;
     move(y, x);
     printwattrs(DECIMAL_COLORS | attrs, "%3d ", i);
     printwattrs(HEX_COLORS | attrs, " 0x%02X ", i);
@@ -140,7 +140,7 @@ static inline void draw_entry(int i, int scrollx, int attrs)
 static void redraw(int selected)
 {
     static int last_selected = -1, last_scrollx = -1, last_W = -1, last_H = -1;
-    int selectedx = (selected / (H-1)) * COL_WIDTH;
+    int selectedx = (selected / (H-2)) * COL_WIDTH;
     int scrollx = (selectedx + COL_WIDTH < W) ? 0 : (((selectedx + COL_WIDTH) - W)/COL_WIDTH+1)*COL_WIDTH;
     if (last_selected == -1 || last_scrollx != scrollx || last_W != W || last_H != H) {
         // Redraw everything
@@ -211,6 +211,8 @@ int main(int argc, char *argv[])
 	OUTPUT_CHAR_COLORS = new_colorpair(COLOR_BLACK, COLOR_WHITE) | A_BOLD;
 	OUTPUT_ESCAPE_COLORS = new_colorpair(COLOR_RED, COLOR_WHITE) | A_BOLD;
     OUTPUT_LABEL_COLORS = new_colorpair(COLOR_BLACK, COLOR_YELLOW);
+    BROWSE_MODE_COLORS = new_colorpair(COLOR_BLACK, COLOR_BLUE);
+    INSERT_MODE_COLORS = new_colorpair(COLOR_WHITE, COLOR_RED) | A_BOLD;
 
     size_t chunk = 256;
     size_t buf_size = chunk, buf_i = 0;
@@ -244,9 +246,21 @@ int main(int argc, char *argv[])
         }
     }
 
+    int insert_mode = 0;
     int selected = 0;
     while (1) {
         redraw(selected);
+        // Title bar
+        move(0,0);
+        if (insert_mode) {
+            const char *str = "ASCII TABLE (typing, press 'esc' to browse)";
+            int spacer = W/2-strlen(str)/2;
+            printwattrs(INSERT_MODE_COLORS, "%*s%s%*s", spacer, "", str, spacer+1, "");
+        } else {
+            const char *str = "ASCII TABLE (browsing, press 'esc' to exit)";
+            int spacer = W/2-strlen(str)/2;
+            printwattrs(BROWSE_MODE_COLORS, "%*s%s%*s", spacer, "", str, spacer+1, "");
+        }
         // Bar at the bottom of the screen showing the output text:
         // left-truncate output so the end of it fits on screen:
         char *visible = &outbuf[buf_i];
@@ -259,6 +273,23 @@ int main(int argc, char *argv[])
         refresh();
       next_input:;
         int key = getch();
+        if (insert_mode) {
+            if (key == 27) {
+                insert_mode = 0;
+                continue;
+            } else if (key == 127) {
+                // Backspace
+                if (buf_i > 0) buf_i--;
+                continue;
+            } else if (0 <= key && key < 127) {
+                outbuf[buf_i++] = (char)key;
+                if (buf_i >= buf_size) {
+                    buf_size *= 2;
+                    outbuf = realloc(outbuf, buf_size);
+                }
+                continue;
+            }
+        }
         switch (key) {
             case 'j': case KEY_DOWN:
                 selected++;
@@ -277,11 +308,15 @@ int main(int argc, char *argv[])
                 break;
 
             case 'l': case 'L': case KEY_RIGHT: case KEY_SRIGHT:
-                selected += H-1;
+                selected += H-2;
                 break;
 
             case 'h': case 'H': case KEY_LEFT: case KEY_SLEFT:
-                selected -= H-1;
+                selected -= H-2;
+                break;
+
+            case 'i': case 'a':
+                insert_mode = 1;
                 break;
 
             case KEY_RESIZE:
@@ -311,10 +346,7 @@ int main(int argc, char *argv[])
                 break;
 
             case KEY_BACKSPACE: case KEY_DC: case 127:
-                if (buf_i > 0) {
+                if (buf_i > 0) buf_i--;
-                    outbuf[buf_i] = 'X';
-                    buf_i--;
-                }
                 break;
 
             case 'q': case 'Q': case KEY_CANCEL: case KEY_CLOSE: case KEY_EXIT: case 27:

doc/ascii.1

@@ -28,7 +28,10 @@ ASCII values will be appended to the output buffer after any piped input.
 In the ASCII table, arrow keys or h/j/k/l can be used to navigate.
 
 .B Editing:
-You can use 'enter' to append to the output buffer and 'backspace' to delete from the output buffer.
+You can use 'enter' to append the selected character to the output buffer and
+\'backspace' to delete from the output buffer. Or, for more rapid input, press
+\'i' to enter insert mode, where you can type freely, and 'escape' when you're
+done.
 
 .B Exiting:
 \'q' or 'escape' will quit and print the output buffer. Control-c can be used