Use parameter settings in auto_scale (#4982)

* Use parameter settings in auto_scale

* Continue if argument is malformed

* Add test

* Update PostScript files

Author: Meghan Jones

doc/examples/ex02/ex02.ps

@@ -18890,7 +18890,7 @@ unsigned int gmt_file_type (struct GMT_CTRL *GMT, const char *file, unsigned int
 }
 #endif
 
-void gmt_auto_offsets_for_colorbar (struct GMT_CTRL *GMT, double offset[], int justify) {
+void gmt_auto_offsets_for_colorbar (struct GMT_CTRL *GMT, double offset[], int justify, struct GMT_OPTION *options) {
 	/* We wish to examine the previous -B setting for information as to which axes was
 	 * annotated and possibly labeled, and if the colorbar is requested to be placed on
 	 * such an axis side we need to make more space by increasing the offset. This is
@@ -18902,6 +18902,9 @@ void gmt_auto_offsets_for_colorbar (struct GMT_CTRL *GMT, double offset[], int j
 	unsigned int pos = 0, sides[5];
 	bool add_label = false, add_annot = false, axis_set = false, was;
 	double GMT_LETTER_HEIGHT = 0.736;
+	struct GMT_OPTION *opt = NULL;
+	char *c = NULL;
+	unsigned int n_errors = 0;
 	FILE *fp = NULL;
 	/* Initialize the default settings before considering any -B history */
 	gmt_set_undefined_defaults (GMT, 0.0, false);	/* Must set undefined to their reference values for now */
@@ -18951,6 +18954,13 @@ void gmt_auto_offsets_for_colorbar (struct GMT_CTRL *GMT, double offset[], int j
 	gmt_M_memcpy (sides, GMT->current.map.frame.side, 5U, unsigned int);
 	was = GMT->current.map.frame.draw;
 	gmtinit_conf_modern_override (GMT);	/* Reset */
+	(void)gmt_getdefaults (GMT, NULL);
+	for (opt = options; opt; opt = opt->next) {
+		if (opt->option != '-') continue;   /* Not a parameter setting */
+		if ((c = strchr (opt->arg, '=')) == NULL) continue;
+		c[0] = '\0';  /* Remove = */
+		n_errors += gmtlib_setparameter (GMT, opt->arg, &c[1], false);
+	}
 	gmt_M_memcpy (GMT->current.map.frame.side, sides, 5U, unsigned int);
 	GMT->current.map.frame.draw = was;
 }

doc/examples/ex29/ex29.ps

@@ -69,7 +69,7 @@ EXTERN_MSC int gmt_get_option_id (int start, char *this_option);
 EXTERN_MSC bool gmt_is_integer (char *L);
 EXTERN_MSC int gmt_get_next_panel (struct GMTAPI_CTRL *API, int fig, int *row, int *col);
 EXTERN_MSC int gmt_report_usage (struct GMTAPI_CTRL *API, struct GMT_OPTION *options, unsigned int special, int (*usage)(struct GMTAPI_CTRL *, int));
-EXTERN_MSC void gmt_auto_offsets_for_colorbar (struct GMT_CTRL *GMT, double offset[], int justify);
+EXTERN_MSC void gmt_auto_offsets_for_colorbar (struct GMT_CTRL *GMT, double offset[], int justify, struct GMT_OPTION *options);
 EXTERN_MSC struct GMT_SUBPLOT * gmt_subplot_info (struct GMTAPI_CTRL *API, int fig);
 EXTERN_MSC int gmt_get_V (char arg);
 EXTERN_MSC char gmt_set_V (int mode);

doc/scripts/GMT_colorbar.ps

@@ -451,7 +451,7 @@ static int parse (struct GMT_CTRL *GMT, struct PSSCALE_CTRL *Ctrl, struct GMT_OP
 	else if (Ctrl->D.refpoint->mode != GMT_REFPOINT_PLOT || strstr (Ctrl->D.refpoint->args, "+w")) {	/* New syntax: */
 		/* Args are +w<length>[/<width>][+e[b|f][<length>]][+h|v][+j<justify>][+ma|c|l|u][+n[<txt>]][+o<dx>[/<dy>]] */
 		double bar_offset[2];	/* Will be initialized in gmt_auto_offsets_for_colorbar */
-		gmt_auto_offsets_for_colorbar (GMT, bar_offset, Ctrl->D.refpoint->justify);
+		gmt_auto_offsets_for_colorbar (GMT, bar_offset, Ctrl->D.refpoint->justify, options);
 		if (gmt_get_modifier (Ctrl->D.refpoint->args, 'j', string))
 			Ctrl->D.justify = gmt_just_decode (GMT, string, PSL_NO_DEF);
 		else {	/* With -Dj or -DJ, set default to reference (mirrored) justify point, else BL */