Added command history to terminal with other bug fixes, added new song to song_list.h (#2855)

* Implemented Terminal + added song to song_list.h

* Added wait() in order to prevent misbehaviour of 'command not found'

3 files changed, 146 insertions, 16 deletions

diff --git a/docs/feature_terminal.md b/docs/feature_terminal.md
index 334a46c2d4..1863599f84 100644
--- a/docs/feature_terminal.md
+++ b/docs/feature_terminal.md
@@ -14,12 +14,14 @@ When enabled, a `> ` prompt will appear, where you'll be able to type, backspace
 
 `#define TERMINAL_HELP` enables some other output helpers that aren't really needed with this page.
 
+Pressing "up" and "down" will allow you to cycle through the past 5 commands entered.
+
 ## Future Ideas
 
 * Keyboard/user-extensible commands
 * Smaller footprint
 * Arrow key support
-* Command history
+* Command history - Done
 * SD card support
 * LCD support for buffer display
 * Keycode -> name string LUT
@@ -43,14 +45,39 @@ QMK Firmware
   Built: 2017-08-29-20:24:44
 ```
 
+
+### `print-buffer`
+
+Outputs the last 5 commands entered
+
+```
+> print-buffer
+0. print-buffer
+1. help
+2. about
+3. keymap 0
+4. help 
+5. flush-buffer
+```
+
+### `flush-buffer`
+
+Clears command buffer
+```
+> flush-buffer
+Buffer cleared!
+```
+
+
 ### `help`
 
+
 Prints out the available commands:
 
 ```
 > help
 commands available:
-  about help keycode keymap exit
+  about help keycode keymap exit print-buffer flush-buffer
 ```
 
 ### `keycode <layer> <row> <col>`
diff --git a/quantum/audio/song_list.h b/quantum/audio/song_list.h
index a66c4d8644..1ddcfb345c 100644
--- a/quantum/audio/song_list.h
+++ b/quantum/audio/song_list.h
@@ -20,6 +20,12 @@
 
 #define NO_SOUND
 
+#define LP_NUMB	\
+	H__NOTE(_CS5), H__NOTE(_E5), H__NOTE(_CS5), WD_NOTE(_FS5), \
+	WD_NOTE(_A5), WD_NOTE(_GS5),   WD_NOTE(_REST),  H__NOTE(_CS5), H__NOTE(_E5), \
+	H__NOTE(_CS5), WD_NOTE(_A5), WD_NOTE(_GS5), WD_NOTE(_E5),
+
+
 #define ODE_TO_JOY                                          \
     Q__NOTE(_E4), Q__NOTE(_E4), Q__NOTE(_F4), Q__NOTE(_G4), \
     Q__NOTE(_G4), Q__NOTE(_F4), Q__NOTE(_E4), Q__NOTE(_D4), \
diff --git a/quantum/process_keycode/process_terminal.c b/quantum/process_keycode/process_terminal.c
index deb1543e3d..bc365dddfa 100644
--- a/quantum/process_keycode/process_terminal.c
+++ b/quantum/process_keycode/process_terminal.c
@@ -20,10 +20,20 @@
 #include <stdio.h>
 #include <math.h>
 
+#ifndef CMD_BUFF_SIZE
+  #define CMD_BUFF_SIZE 5
+#endif
+
+
 bool terminal_enabled = false;
 char buffer[80] = "";
+char cmd_buffer[CMD_BUFF_SIZE][80];
+bool cmd_buffer_enabled = true; //replace with ifdef?
 char newline[2] = "\n";
 char arguments[6][20];
+bool firstTime = true;
+
+short int current_cmd_buffer_pos = 0; //used for up/down arrows - keeps track of where you are in the command buffer
 
 __attribute__ ((weak))
 const char terminal_prompt[8] = "> ";
@@ -34,36 +44,37 @@ const char terminal_prompt[8] = "> ";
     #endif
     float terminal_song[][2] = TERMINAL_SONG;
     #define TERMINAL_BELL() PLAY_SONG(terminal_song)
-#else 
-    #define TERMINAL_BELL()  
+#else
+    #define TERMINAL_BELL()
 #endif
 
 __attribute__ ((weak))
 const char keycode_to_ascii_lut[58] = {
     0, 0, 0, 0,
     'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
-    'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 
+    'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
     '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', 0, 0, 0, '\t',
     ' ', '-', '=', '[', ']', '\\', 0, ';', '\'', '`', ',', '.', '/'
-}; 
+};
 
 __attribute__ ((weak))
 const char shifted_keycode_to_ascii_lut[58] = {
     0, 0, 0, 0,
     'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
-    'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 
+    'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
     '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', 0, 0, 0, '\t',
     ' ', '_', '+', '{', '}', '|', 0, ':', '\'', '~', '<', '>', '?'
-}; 
+};
 
-struct stringcase { 
-    char* string; 
-    void (*func)(void); 
+struct stringcase {
+    char* string;
+    void (*func)(void);
 } typedef stringcase;
 
 void enable_terminal(void) {
     terminal_enabled = true;
     strcpy(buffer, "");
+    memset(cmd_buffer,0,CMD_BUFF_SIZE * 80);
     for (int i = 0; i < 6; i++)
         strcpy(arguments[i], "");
     // select all text to start over
@@ -73,6 +84,29 @@ void enable_terminal(void) {
 
 void disable_terminal(void) {
     terminal_enabled = false;
+    SEND_STRING("\n");
+}
+
+void push_to_cmd_buffer(void) {
+if (cmd_buffer_enabled) {
+    if (cmd_buffer == NULL) {
+      return;
+    } else {
+    if (firstTime) {
+     firstTime = false;
+     strcpy(cmd_buffer[0],buffer);
+     return;
+   }
+
+   for (int i= CMD_BUFF_SIZE - 1;i > 0 ;--i) {
+      strncpy(cmd_buffer[i],cmd_buffer[i-1],80);
+   }
+
+   strcpy(cmd_buffer[0],buffer);
+
+   return;
+    }
+  }
 }
 
 void terminal_about(void) {
@@ -136,11 +170,34 @@ void terminal_keymap(void) {
     }
 }
 
-stringcase terminal_cases[] = { 
+void print_cmd_buff(void) {
+  /* without the below wait, a race condition can occur wherein the
+   buffer can be printed before it has been fully moved */
+  wait_ms(250);
+  for(int i=0;i<CMD_BUFF_SIZE;i++){
+    char tmpChar = ' ';
+    itoa(i ,&tmpChar,10);
+    const char * tmpCnstCharStr = &tmpChar; //because sned_string wont take a normal char *
+    send_string(tmpCnstCharStr);
+    SEND_STRING(". ");
+    send_string(cmd_buffer[i]);
+    SEND_STRING("\n");
+  }
+}
+
+
+void flush_cmd_buffer(void) {
+  memset(cmd_buffer,0,CMD_BUFF_SIZE * 80);
+  SEND_STRING("Buffer Cleared!\n");
+}
+
+stringcase terminal_cases[] = {
     { "about", terminal_about },
     { "help", terminal_help },
     { "keycode", terminal_keycode },
     { "keymap", terminal_keymap },
+    { "flush-buffer" , flush_cmd_buffer},
+    { "print-buffer" , print_cmd_buff},
     { "exit", disable_terminal }
 };
 
@@ -154,6 +211,7 @@ void terminal_help(void) {
 }
 
 void command_not_found(void) {
+    wait_ms(50); //sometimes buffer isnt grabbed quick enough
     SEND_STRING("command \"");
     send_string(buffer);
     SEND_STRING("\" not found\n");
@@ -171,7 +229,7 @@ void process_terminal_command(void) {
         pch = strtok(NULL, " ");
         i++;
     }
-  
+
     bool command_found = false;
     for( stringcase* case_p = terminal_cases; case_p != terminal_cases + sizeof( terminal_cases ) / sizeof( terminal_cases[0] ); case_p++ ) {
         if( 0 == strcmp( case_p->string, buffer ) ) {
@@ -192,6 +250,16 @@ void process_terminal_command(void) {
         send_string(terminal_prompt);
     }
 }
+void check_pos(void) {
+  if (current_cmd_buffer_pos >= CMD_BUFF_SIZE) { //if over the top, move it back down to the top of the buffer so you can climb back down...
+    current_cmd_buffer_pos = CMD_BUFF_SIZE - 1;
+  } else  if (current_cmd_buffer_pos < 0) { //...and if you fall under the bottom of the buffer, reset back to 0 so you can climb back up
+    current_cmd_buffer_pos = 0;
+  }
+}
+
+
+
 
 bool process_terminal(uint16_t keycode, keyrecord_t *record) {
 
@@ -210,6 +278,8 @@ bool process_terminal(uint16_t keycode, keyrecord_t *record) {
             char char_to_add;
             switch (keycode) {
                 case KC_ENTER:
+                    push_to_cmd_buffer();
+                    current_cmd_buffer_pos = 0;
                     process_terminal_command();
                     return false; break;
                 case KC_ESC:
@@ -226,9 +296,36 @@ bool process_terminal(uint16_t keycode, keyrecord_t *record) {
                         return false;
                     } break;
                 case KC_LEFT:
+                    return false; break;
                 case KC_RIGHT:
-                case KC_UP:
+                    return false; break;
+                case KC_UP: // 0 = recent
+                  check_pos(); //check our current buffer position is valid
+                  if (current_cmd_buffer_pos <= CMD_BUFF_SIZE - 1) { //once we get to the top, dont do anything
+                    str_len = strlen(buffer);
+                    for(int  i= 0;i < str_len ;++i) {
+                        send_string(SS_TAP(X_BSPACE)); //clear w/e is on the line already
+                        //process_terminal(KC_BSPC,record);
+                    }
+                    strncpy(buffer,cmd_buffer[current_cmd_buffer_pos],80);
+
+                    send_string(buffer);
+                    ++current_cmd_buffer_pos; //get ready to access the above cmd if up/down is pressed again
+                  }
+                    return false; break;
                 case KC_DOWN:
+                  check_pos();
+                  if (current_cmd_buffer_pos >= 0) { //once we get to the bottom, dont do anything
+                      str_len = strlen(buffer);
+                      for(int  i= 0;i < str_len ;++i) {
+                          send_string(SS_TAP(X_BSPACE)); //clear w/e is on the line already
+                          //process_terminal(KC_BSPC,record);
+                      }
+                      strncpy(buffer,cmd_buffer[current_cmd_buffer_pos],79);
+
+                      send_string(buffer);
+                      --current_cmd_buffer_pos; //get ready to access the above cmd if down/up is pressed again
+                    }
                     return false; break;
                 default:
                     if (keycode <= 58) {
@@ -240,7 +337,7 @@ bool process_terminal(uint16_t keycode, keyrecord_t *record) {
                         }
                         if (char_to_add != 0) {
                             strncat(buffer, &char_to_add, 1);
-                        } 
+                        }
                     } break;
             }
 
@@ -249,4 +346,4 @@ bool process_terminal(uint16_t keycode, keyrecord_t *record) {
         }
     }
     return true;
-}
\ No newline at end of file
+}