TW-1655: Inform "No changes made." when quitting early due to signal

- Thanks to Daniel Shahaf.

ChangeLog

@@ -123,6 +123,8 @@
 - TW-1652 task rm misparsed (thanks to Daniel Shahaf).
 - TW-1653 info report regression; shouldn't be context sensitive (thanks to
           David Patrick).
+- TW-1655 Inform "No changes made." when quitting early due to signal (thanks
+          to Daniel Shahaf).
 - Prevent potential task duplication during import for non-pending tasks.
 - Show the active context in "context list", if any is active.
 - Fix "task edit" dropping annotation text after newlines.

src/l10n/deu-DEU.h

@@ -752,6 +752,7 @@
 #define STRING_ERROR_DETAILS         "Die Option 'calendar.details.report' muss einen einzelnen Report-Namen enthalten."
 #define STRING_ERROR_NO_FILTER       "Command line filters are not supported by this command."
 #define STRING_ERROR_NO_MODS         "Command line modifications are not supported by this command."
+#define STRING_ERROR_CONFIRM_SIGINT  "Interrupted: No changes made."
 
 // Feedback
 #define STRING_FEEDBACK_NO_TASKS     "Keine Aufgaben."

src/l10n/eng-USA.h

@@ -384,6 +384,7 @@
 #define STRING_CMD_DELETE_1          "Deleted {1} task."
 #define STRING_CMD_DELETE_N          "Deleted {1} tasks."
 
+
 #define STRING_CMD_DUPLICATE_USAGE   "Duplicates the specified tasks"
 #define STRING_CMD_DUPLICATE_REC     "Note: task {1} was a parent recurring task.  The duplicated task is too."
 #define STRING_CMD_DUPLICATE_NON_REC "Note: task {1} was a recurring task.  The duplicated task is not."
@@ -749,6 +750,7 @@
 #define STRING_ERROR_DETAILS         "The setting 'calendar.details.report' must contain a single report name."
 #define STRING_ERROR_NO_FILTER       "Command line filters are not supported by this command."
 #define STRING_ERROR_NO_MODS         "Command line modifications are not supported by this command."
+#define STRING_ERROR_CONFIRM_SIGINT  "Interrupted: No changes made."
 
 // Feedback
 #define STRING_FEEDBACK_NO_TASKS     "No tasks."

src/l10n/epo-RUS.h

@@ -752,6 +752,7 @@
 #define STRING_ERROR_DETAILS         "Agordo 'calendar.details.report' devas enhavi sole unu raportnomon."
 #define STRING_ERROR_NO_FILTER       "Command line filters are not supported by this command."
 #define STRING_ERROR_NO_MODS         "Command line modifications are not supported by this command."
+#define STRING_ERROR_CONFIRM_SIGINT  "Interrupted: No changes made."
 
 // Feedback
 #define STRING_FEEDBACK_NO_TASKS     "Nenia tasko."

src/l10n/esp-ESP.h

@@ -764,6 +764,7 @@
 #define STRING_ERROR_DETAILS         "El ajuste 'calendar.details.report' debe contener un único nombre de informe."
 #define STRING_ERROR_NO_FILTER       "Command line filters are not supported by this command."
 #define STRING_ERROR_NO_MODS         "Command line modifications are not supported by this command."
+#define STRING_ERROR_CONFIRM_SIGINT  "Interrupted: No changes made."
 
 // Feedback
 #define STRING_FEEDBACK_NO_TASKS     "Ninguna tarea."

src/l10n/fra-FRA.h

@@ -752,6 +752,7 @@
 #define STRING_ERROR_DETAILS         "The setting 'calendar.details.report' must contain a single report name."
 #define STRING_ERROR_NO_FILTER       "Command line filters are not supported by this command."
 #define STRING_ERROR_NO_MODS         "Command line modifications are not supported by this command."
+#define STRING_ERROR_CONFIRM_SIGINT  "Interrupted: No changes made."
 
 // Feedback
 #define STRING_FEEDBACK_NO_TASKS     "No tasks."

src/l10n/ita-ITA.h

@@ -751,6 +751,7 @@
 #define STRING_ERROR_DETAILS         "The setting 'calendar.details.report' must contain a single report name."
 #define STRING_ERROR_NO_FILTER       "Command line filters are not supported by this command."
 #define STRING_ERROR_NO_MODS         "Command line modifications are not supported by this command."
+#define STRING_ERROR_CONFIRM_SIGINT  "Interrupted: No changes made."
 
 // Feedback
 #define STRING_FEEDBACK_NO_TASKS     "Nessun task."

src/l10n/jpn-JPN.h

@@ -752,6 +752,7 @@
 #define STRING_ERROR_DETAILS         "The setting 'calendar.details.report' must contain a single report name."
 #define STRING_ERROR_NO_FILTER       "Command line filters are not supported by this command."
 #define STRING_ERROR_NO_MODS         "Command line modifications are not supported by this command."
+#define STRING_ERROR_CONFIRM_SIGINT  "Interrupted: No changes made."
 
 // Feedback
 #define STRING_FEEDBACK_NO_TASKS     "タスクがない。"

src/l10n/pol-POL.h

@@ -752,6 +752,7 @@
 #define STRING_ERROR_DETAILS         "Zmienna 'calendar.details.report' musi zawierać nazwę raportu."
 #define STRING_ERROR_NO_FILTER       "Command line filters are not supported by this command."
 #define STRING_ERROR_NO_MODS         "Command line modifications are not supported by this command."
+#define STRING_ERROR_CONFIRM_SIGINT  "Interrupted: No changes made."
 
 // Feedback
 #define STRING_FEEDBACK_NO_TASKS     "Brak zadań."

src/l10n/por-PRT.h

@@ -752,6 +752,7 @@
 #define STRING_ERROR_DETAILS         "A definição 'calendar.details.report' pode apenas indicar um nome de relatório."
 #define STRING_ERROR_NO_FILTER       "Command line filters are not supported by this command."
 #define STRING_ERROR_NO_MODS         "Command line modifications are not supported by this command."
+#define STRING_ERROR_CONFIRM_SIGINT  "Interrupted: No changes made."
 
 // Feedback
 #define STRING_FEEDBACK_NO_TASKS     "Nenhuma tarefa."

src/util.cpp

@@ -45,6 +45,7 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <signal.h>
 #include <pwd.h>
 #include <errno.h>
 #include <signal.h>
@@ -58,6 +59,16 @@
 
 extern Context context;
 
+//////////////////////////////////////////////////////////////////////////////// 
+static void signal_handler (int s)
+{
+  if (s == SIGINT)
+  {
+    std::cout << "\n\n" << STRING_ERROR_CONFIRM_SIGINT << "\n";
+    exit (1);
+  }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Uses std::getline, because std::cin eats leading whitespace, and that means
 // that if a newline is entered, std::cin eats it and never returns from the
@@ -69,6 +80,8 @@ bool confirm (const std::string& question)
                                      STRING_UTIL_CONFIRM_NO};
   std::vector <std::string> matches;
 
+  signal (SIGINT, signal_handler);
+
   do
   {
     std::cout << question
@@ -83,6 +96,7 @@ bool confirm (const std::string& question)
   }
   while (! std::cin.eof () && matches.size () != 1);
 
+  signal (SIGINT, SIG_DFL);
   return matches.size () == 1 && matches[0] == STRING_UTIL_CONFIRM_YES ? true : false;
 }
 
@@ -101,6 +115,8 @@ int confirm4 (const std::string& question)
                                      STRING_UTIL_CONFIRM_QUIT};
   std::vector <std::string> matches;
 
+  signal (SIGINT, signal_handler);
+
   do
   {
     std::cout << question
@@ -119,6 +135,8 @@ int confirm4 (const std::string& question)
   }
   while (! std::cin.eof () && matches.size () != 1);
 
+  signal (SIGINT, SIG_DFL);
+
   if (matches.size () == 1)
   {
          if (matches[0] == STRING_UTIL_CONFIRM_YES_U) return 1;