Support for external commands like mogrify & jpegtran

commands.h

@@ -0,0 +1,24 @@
+#define FILENAME (const char*) 0x1
+
+typedef struct {
+	KeySym ksym;
+	const char **cmdline;
+	Bool reload;
+} command_t;
+
+static const char *cmdline_1[] = { "jpegtran", "-rotate", "270", "-copy", "all",
+                                   "-outfile", FILENAME, FILENAME, NULL };
+static const char *cmdline_2[] = { "jpegtran", "-rotate", "90", "-copy", "all",
+                                   "-outfile", FILENAME, FILENAME, NULL };
+static const char *cmdline_3[] = { "mogrify", "-rotate", "-90", FILENAME,
+                                   NULL };
+static const char *cmdline_4[] = { "mogrify", "-rotate", "+90", FILENAME,
+                                   NULL };
+
+static command_t commands[] = {
+	/* key            command-line      reload? */
+	{  XK_a,          cmdline_1,        True },
+	{  XK_s,          cmdline_2,        True },
+	{  XK_A,          cmdline_3,        True },
+	{  XK_S,          cmdline_4,        True },
+};

image.c

@@ -99,10 +99,13 @@ int img_load(img_t *img, const char *filename) {
 	return 1;
 }
 
-void img_close(img_t *img) {
+void img_close(img_t *img, int decache) {
 	if (img && img->im) {
 		imlib_context_set_image(img->im);
-		imlib_free_image();
+		if (decache)
+			imlib_free_image_and_decache();
+		else
+			imlib_free_image();
 		img->im = NULL;
 	}
 }

image.h

@@ -57,7 +57,7 @@ void img_free(img_t*);
 
 int img_check(const char*);
 int img_load(img_t*, const char*);
-void img_close(img_t*);
+void img_close(img_t*, int);
 
 void img_render(img_t*, win_t*);
 

main.c

@@ -23,6 +23,8 @@
 #include <sys/select.h>
 #include <sys/stat.h>
 #include <sys/time.h>
+#include <sys/wait.h>
+#include <unistd.h>
 
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
@@ -33,6 +35,7 @@
 #include "thumbs.h"
 #include "util.h"
 #include "window.h"
+#include "commands.h"
 
 typedef enum {
 	MODE_NORMAL = 0,
@@ -62,7 +65,7 @@ void cleanup() {
 	static int in = 0;
 
 	if (!in++) {
-		img_close(&img);
+		img_close(&img, 0);
 		img_free(&img);
 		tns_free(&tns, &win);
 		win_close(&win);
@@ -73,7 +76,7 @@ int load_image(int new) {
 	struct stat fstats;
 
 	if (new >= 0 && new < filecnt) {
-		img_close(&img);
+		img_close(&img, 0);
 		fileidx = new;
 		if (!stat(filenames[fileidx], &fstats))
 			filesize = fstats.st_size;
@@ -270,6 +273,60 @@ void read_dir_rec(const char *dirname) {
 	free(dirnames);
 }
 
+int run_command(const char **cmdline, Bool reload) {
+	int argc, i;
+	const char **argv;
+	pid_t pid;
+	int error, ret, status;
+
+	if (!cmdline)
+		return 0;
+
+	argc = 1;
+	while (cmdline[argc-1])
+		++argc;
+
+	if (argc < 2)
+		return 0;
+
+	argv = (const char**) s_malloc(argc * sizeof(const char*));
+	error = ret = 0;
+
+	for (i = 0; i < argc; ++i) {
+		if (cmdline[i] != FILENAME)
+			argv[i] = cmdline[i];
+		else
+			argv[i] = filenames[mode == MODE_NORMAL ? fileidx : tns.sel];
+	}
+
+	if ((pid = fork()) == 0) {
+		execvp(argv[0], (char **const) argv);
+		warn("could not exec %s", argv[0]);
+		exit(1);
+	} else if (pid < 0 && !options->quiet) {
+		warn("could not fork. command line was:");
+		error = 1;
+	} else if (reload) {
+		waitpid(pid, &status, 0);
+		if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+			ret = 1;
+		} else if (!options->quiet) {
+			warn("child exited with non-zero return value: %d. command line was:",
+			     WEXITSTATUS(status));
+			error = 1;
+		}
+	}
+	
+	if (error) {
+		for (i = 0; i < argc && argv[i]; ++i)
+			fprintf(stderr, "%s%s", i > 0 ? " " : "", argv[i]);
+		fprintf(stderr, "\n");
+	}
+
+	free(argv);
+	return ret;
+}
+
 
 /* event handling */
 
@@ -293,7 +350,7 @@ void redraw() {
 }
 
 void on_keypress(XKeyEvent *kev) {
-	int x, y;
+	int i, x, y;
 	unsigned int w, h;
 	char key;
 	KeySym ksym;
@@ -305,6 +362,25 @@ void on_keypress(XKeyEvent *kev) {
 	XLookupString(kev, &key, 1, &ksym, NULL);
 	changed = 0;
 
+	/* external commands from commands.h */
+	for (i = 0; i < LEN(commands); ++i) {
+		if (commands[i].ksym == ksym) {
+			win_set_cursor(&win, CURSOR_WATCH);
+			if (run_command(commands[i].cmdline, commands[i].reload)) {
+				if (mode == MODE_NORMAL) {
+					img_close(&img, 1);
+					load_image(fileidx);
+					tns_load(&tns, &win, fileidx, filenames[fileidx]);
+				} else {
+					tns_load(&tns, &win, tns.sel, filenames[tns.sel]);
+				}
+				redraw();
+			}
+			win_set_cursor(&win, mode == MODE_NORMAL ? CURSOR_NONE : CURSOR_ARROW);
+			return;
+		}
+	}
+
 	if (mode == MODE_NORMAL) {
 		switch (ksym) {
 			/* navigate image list */
@@ -395,7 +471,7 @@ void on_keypress(XKeyEvent *kev) {
 			case XK_Return:
 				if (!tns.thumbs)
 					tns_init(&tns, filecnt);
-				img_close(&img);
+				img_close(&img, 0);
 				mode = MODE_THUMBS;
 				win_set_cursor(&win, CURSOR_ARROW);
 				timo_cursor = 0;

thumbs.c

@@ -66,12 +66,10 @@ void tns_load(tns_t *tns, win_t *win, int n, const char *filename) {
 	else if (n >= tns->cnt)
 		tns->cnt = n + 1;
 
-	if ((im = imlib_load_image(filename))) {
+	if ((im = imlib_load_image(filename)))
 		imlib_context_set_image(im);
-		imlib_image_set_changes_on_disk();
-	} else {
+	else
 		imlib_context_set_image(im_broken);
-	}
 
 	w = imlib_image_get_width();
 	h = imlib_image_get_height();
@@ -95,7 +93,7 @@ void tns_load(tns_t *tns, win_t *win, int n, const char *filename) {
 	tns->dirty = 1;
 
 	if (im)
-		imlib_free_image();
+		imlib_free_image_and_decache();
 }
 
 void tns_check_view(tns_t *tns, Bool scrolled) {

window.c

@@ -331,4 +331,6 @@ void win_set_cursor(win_t *win, win_cur_t cursor) {
 			XDefineCursor(win->env.dpy, win->xwin, carrow);
 			break;
 	}
+
+	XFlush(win->env.dpy);
 }