feature: picking file

Now you can pick a file for import/export/open/save with an external command.

3 files changed, 16 insertions, 7 deletions

diff --git a/config.def.h b/config.def.h
index 396f26a..ee8e1fa 100644
--- a/config.def.h
+++ b/config.def.h
@@ -4,6 +4,8 @@ const unsigned int maxzoom = 20;
 const unsigned int fps = 30;
 const char *def_palette_path    = "assets/default.gpl";
 const char *def_theme_path      = "assets/ui.png";
+/* path to an external program for picking files. it should output only the picked file in stdout */
+const char *cmd_file_picker     = NULL; /* NULL - will take input from terminal */
 const unsigned int back_c       = COLTOINT(146, 161, 185);
 
 static Key keys[] = {
diff --git a/src/cdraw.h b/src/cdraw.h
index 0f57a7f..38bb058 100644
--- a/src/cdraw.h
+++ b/src/cdraw.h
@@ -10,6 +10,7 @@ extern SDL_Window *win;
 extern void *ren;
 extern void *def_palette;
 extern const char *def_palette_path;
+extern const char *cmd_file_picker;
 extern int mouseX, mouseY;
 extern const unsigned int back_c;
 
diff --git a/src/user.c b/src/user.c
index ab86010..0261c65 100644
--- a/src/user.c
+++ b/src/user.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <SDL2/SDL.h>
 
@@ -86,7 +87,6 @@ user_canvas_open(const Arg *x)
 void
 user_canvas_export_png(const Arg *x)
 {
-	puts("called");
 	char line[1024];
 	if (cur_canvas == NULL) return;
 	choose_file_path("Image File Name (export): ", line);
@@ -226,13 +226,19 @@ user_testing_reload_tex(const Arg *_x)
 static void
 choose_file_path(const char *prompt, char *input)
 {
-	printf(prompt);
-	fflush(stdout);
+	FILE *ft;
+	ft = cmd_file_picker == NULL ? NULL : popen(cmd_file_picker, "r");
+	input[0] = '\0';
+
+	if (ft == NULL) {
+/*TODO: error; for now using terminal input as backup*/
+		printf(prompt);
+		fflush(stdout);
+		ft = stdin;
+	}
 
-	do {
-		fgets(input, 1024, stdin);
-	} while (strlen(input) < 4);
+	while (fgets(input, 1024, ft) != NULL && strlen(input) < 4);
 	input[strcspn(input, "\n")] = '\0';
 
-	printf("%s\n", input);
+	if (ft != stdin) pclose(ft);
 }