New option: -F, fixed/floating window

options.c

@@ -29,7 +29,7 @@ options_t _options;
 const options_t *options = (const options_t*) &_options;
 
 void print_usage() {
-	printf("usage: sxiv [-dfhpqsvZ] [-g GEOMETRY] [-z ZOOM] FILES...\n");
+	printf("usage: sxiv [-dFfhpqsvZ] [-g GEOMETRY] [-z ZOOM] FILES...\n");
 }
 
 void print_version() {
@@ -45,12 +45,13 @@ void parse_options(int argc, char **argv) {
 	_options.zoom = 1.0;
 	_options.aa = 1;
 
+	_options.fixed = 0;
 	_options.fullscreen = 0;
 	_options.geometry = NULL;
 
 	_options.quiet = 0;
 
-	while ((opt = getopt(argc, argv, "dfg:hpqsvZz:")) != -1) {
+	while ((opt = getopt(argc, argv, "dFfg:hpqsvZz:")) != -1) {
 		switch (opt) {
 			case '?':
 				print_usage();
@@ -58,6 +59,9 @@ void parse_options(int argc, char **argv) {
 			case 'd':
 				_options.scalemode = SCALE_DOWN;
 				break;
+			case 'F':
+				_options.fixed = 1;
+				break;
 			case 'f':
 				_options.fullscreen = 1;
 				break;

options.h

@@ -29,6 +29,7 @@ typedef struct options_s {
 	float zoom;
 	unsigned char aa;
 
+	unsigned char fixed;
 	unsigned char fullscreen;
 	char *geometry;
 

window.c

@@ -33,7 +33,8 @@ static GC bgc;
 
 void win_open(win_t *win) {
 	win_env_t *e;
-	XClassHint *classhint;
+	XClassHint classhint;
+	XSizeHints sizehints;
 	XColor bgcol;
 	int gmask;
 
@@ -99,11 +100,17 @@ void win_open(win_t *win) {
 
 	win_set_title(win, "sxiv");
 
-	if ((classhint = XAllocClassHint())) {
-		classhint->res_name = "sxiv";
-		classhint->res_class = "sxiv";
-		XSetClassHint(e->dpy, win->xwin, classhint);
-		XFree(classhint);
+	classhint.res_name = "sxiv";
+	classhint.res_class = "sxiv";
+	XSetClassHint(e->dpy, win->xwin, &classhint);
+
+	if (options->fixed) {
+		sizehints.flags = PMinSize | PMaxSize;
+		sizehints.min_width = win->w;
+		sizehints.max_width = win->w;
+		sizehints.min_height = win->h;
+		sizehints.max_height = win->h;
+		XSetWMNormalHints(e->dpy, win->xwin, &sizehints);
 	}
 
 	XMapWindow(e->dpy, win->xwin);