Rename text_input to utils, add a util in it.

Change-Id: I5d37ed0a3a21e7d62aa061a6b09f30065c4cd8a6

app/Makefile

@@ -1,6 +1,6 @@
 app_objs += $(addprefix app/,\
 						app.o\
-						text_input.o)
+						utils.o)
 products += $(app_objs) app.elf app.hex app.bin
 
 app.elf: $(app_objs)

app/app.cpp

@@ -6,7 +6,7 @@ extern "C" {
 
 #include <poincare.h>
 
-#include "text_input.h"
+#include "utils.h"
 
 void draw_lines_from_center() {
   KDCoordinate width = SCREEN_WIDTH;
@@ -60,16 +60,6 @@ void funnyPlot() {
   delete e;
 }
 
-static void clear_screen() {
-  KDRect r;
-  r.x = 0;
-  r.y = 0;
-  r.width = SCREEN_WIDTH;
-  r.height = SCREEN_HEIGHT;
-  KDFillRect(r, 0x00);
-}
-
-
 static void interactive_expression_parsing() {
   while (1) {
     char * text_input = get_text();

app/utils.cpp

@@ -7,6 +7,15 @@ extern "C" {
 
 #define PROMPT_HEIGHT 30
 
+void clear_screen() {
+  KDRect r;
+  r.x = 0;
+  r.y = 0;
+  r.width = SCREEN_WIDTH;
+  r.height = SCREEN_HEIGHT;
+  KDFillRect(r, 0x00);
+}
+
 static void clear_prompt() {
   KDRect r;
   r.x = 0;

app/utils.h

@@ -1,8 +1,10 @@
-#ifndef APP_TEXTINPUT_H
-#define APP_TEXTINPUT_H
+#ifndef APP_UTILS_H
+#define APP_UTILS_H
 
 /* Returns a pointer to an input text, allocated by the functions (it is thus
  * the caller's role to free it). */
 char* get_text();
 
-#endif // APP_TEXTINPUT_H
+void clear_screen();
+
+#endif // APP_UTILS_H