Don't attempt to reload stdin images

Resolves artemsen#140.

Signed-off-by: diniamo <[email protected]>

src/image.c

@@ -132,7 +132,7 @@ struct image* image_from_stdin(void)
     }
 
     if (data) {
-        ctx = image_create("{STDIN}", data, size);
+        ctx = image_create(STDIN_FILE_NAME, data, size);
     }
 
 done:

src/image.h

@@ -34,6 +34,9 @@ struct image_info {
     char* value;     ///< Meta value
 };
 
+/** Name used for image, that is read from stdin through pipe. */
+#define STDIN_FILE_NAME "{STDIN}"
+
 /**
  * Load image from file.
  * @param file path to the file to load

src/imagelist.c

@@ -29,8 +29,6 @@
 
 /** Number of entries added on reallocation. */
 #define ALLOCATE_SIZE 32
-/** Name used for image, that is read from stdin through pipe. */
-#define STDIN_FILE_NAME "*stdin*"
 
 /** Single list entry. */
 struct entry {
@@ -592,6 +590,11 @@ bool image_list_skip(void)
     return image_list_jump(jump_next_file);
 }
 
+bool image_list_is_stdin(void)
+{
+    return strcmp(ctx.current->file_path, STDIN_FILE_NAME) == 0;
+}
+
 bool image_list_reset(void)
 {
     // reset cache

src/imagelist.h

@@ -72,6 +72,14 @@ struct image_entry image_list_current(void);
  */
 bool image_list_skip(void);
 
+/**
+ * Get whether the current image is from stdin.
+ *
+ * This implies that it is also the only image open.
+ * @return false if the current image is not from stdin
+ */
+bool image_list_is_stdin(void);
+
 /**
  * Reset cache and reload current image.
  * @return false if reset failed (no more images)

src/viewer.c

@@ -607,6 +607,10 @@ void viewer_free(void)
 
 bool viewer_reload(void)
 {
+    if (image_list_is_stdin()) {
+        reset_state();
+        return true;
+    }
     if (!image_list_reset()) {
         printf("No more images, exit\n");
         ui_stop();