new feature - reload a file with a keypress, closes #69

[smdp.git] / src / main.c

diff --git a/src/main.c b/src/main.c
index e1829a8..37af9bc 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -49,9 +49,11 @@ void version() {
 }
 
 int main(int argc, char *argv[]) {
-    int notrans = 0;
-    int nofade = 0;
-    int invert = 0;
+    int notrans = 0;   // disable transparency
+    int nofade = 0;    // disable fading
+    int invert = 0;    // invert color (black on white)
+    int reload = 0;    // reload page N (0 means no reload)
+    int noreload = 1;  // reload disabled until we know input is a file
 
     // define command-line options
     struct option longopts[] = {
@@ -81,7 +83,7 @@ int main(int argc, char *argv[]) {
     }
 
     // open file or set input to STDIN
-    char *file;
+    char *file = NULL;
     FILE *input;
     if (optind < argc) {
         do {
@@ -96,34 +98,57 @@ int main(int argc, char *argv[]) {
                 fprintf(stderr, "%s: %s: %s\n", argv[0], file, strerror(errno));
                 exit(EXIT_FAILURE);
             }
+            // enable reload because input is a file
+            noreload = 0;
         }
     } else {
         input = stdin;
     }
 
-    // load deck object from input
-    deck_t *deck;
-    deck = markdown_load(input);
+    // reload loop
+    do {
+
+        // reopen input file on reload
+        if(noreload == 0 && reload > 0) {
+            if(file) {
+                input = fopen(file,"r");
+                if(!input) {
+                    fprintf(stderr, "%s: %s: %s\n", argv[0], file, strerror(errno));
+                    exit(EXIT_FAILURE);
+                }
+            } else {
+                fprintf(stderr, "%s: %s\n", argv[0], "no input file");
+                exit(EXIT_FAILURE);
+            }
+        }
 
-    // close file
-    fclose(input);
+        // load deck object from input
+        deck_t *deck;
+        deck = markdown_load(input);
 
-    // replace stdin with current tty if input was a pipe
-    if(input == stdin) {
-        input = freopen("/dev/tty", "rw", stdin);
-        if(!input) {
-            fprintf(stderr, "%s: %s: %s\n", argv[0], "/dev/tty", strerror(errno));
-            exit(EXIT_FAILURE);
+        // close file
+        fclose(input);
+
+        // replace stdin with current tty if input was a pipe
+        // if input was a pipe reload is disabled, so we simply check that
+        if(noreload == 1) {
+            input = freopen("/dev/tty", "rw", stdin);
+            if(!input) {
+                fprintf(stderr, "%s: %s: %s\n", argv[0], "/dev/tty", strerror(errno));
+                exit(EXIT_FAILURE);
+            }
         }
-    }
 
-    if(debug > 0) {
-        markdown_debug(deck, debug);
-    }
+        if(debug > 0) {
+            markdown_debug(deck, debug);
+        }
+
+        reload = ncurses_display(deck, notrans, nofade, invert, reload, noreload);
 
-    ncurses_display(deck, notrans, nofade, invert);
+        free_deck(deck);
 
-    free_deck(deck);
+    // reload if supported and requested
+    } while(noreload == 0 && reload > 0);
 
     return EXIT_SUCCESS;
 }