sch2fig/: support sheet and file labels in sheet as well

sch2fig/sch.c

@@ -11,6 +11,7 @@
  */
 
 
+#define	_GNU_SOURCE	/* for asprintf */
 #include <stddef.h>
 #include <stdbool.h>
 #include <stdlib.h>
@@ -304,13 +305,42 @@ static bool parse_hsheet_field(struct sch_ctx *ctx, const char *line)
 	unsigned n, dim;
 
 	if (sscanf(line, "F%d \"%m[^\"]\" %u", &n, &s, &dim) == 3) {
-		assert(n < 2);
-		return 1;	/* @@@ later */
+		switch (n) {
+		case 0:
+			ctx->sheet = s;
+			ctx->sheet_dim = dim;
+			return 1;
+		case 1:
+			ctx->file = s;
+			ctx->file_dim = dim;
+			return 1;
+		default:
+			assert(0);
 		}
+	}
+
 	if (sscanf(line, "F%d \"%m[^\"]\" %c %c %d %d %u",
 	    &n, &s, &form, &side, &x, &y, &dim) != 7)
 		return 0;
 	assert(n >= 2);
+
+	if (side == 'B' || side == 'T') {
+		/*
+		 * This is beautiful: since there is no indication for rotation
+		 * on the hsheet, or the sheet or file fields, we need to look
+		 * at whether the imported sheet pins go left or right (no
+		 * rotation) or whether they go top or bottom (rotation).
+		 *
+		 * A sheet with no imported pins lacks these hints, and is
+		 * therefore always assumed to be without rotation.
+		 *
+		 * Eeschema is careful to be consistent, and does not allow
+		 * sheets with no imported pins to be rotated. Even better, it
+		 * flips rotated sheets where the last imported pin is deleted
+		 * back.
+		 */
+		ctx->rotated = 1;
+	}
 	dwg_hlabel(x, y, s, decode_side(side), dim, decode_form(form));
 	free(s);
 
@@ -318,6 +348,53 @@ static bool parse_hsheet_field(struct sch_ctx *ctx, const char *line)
 }
 
 
+static void do_hsheet_text(struct sch_ctx *ctx)
+{
+	char *s;
+
+	assert(ctx->sheet && ctx->file);
+
+	struct text sheet_txt = {
+		.size = ctx->sheet_dim,
+		.x = ctx->x,
+		.y = ctx->y,
+		.rot = 0,
+		.hor = text_min,
+		.vert = text_min,
+	};
+	asprintf(&s, "Sheet: %s", ctx->sheet);
+	sheet_txt.s = s; /* work around "const" mismatch */
+
+	struct text file_txt = {
+		.size = ctx->file_dim,
+		.x = ctx->x,
+		.y = ctx->y,
+		.rot = 0,
+		.hor = text_min,
+		.vert = text_max,
+	};
+	asprintf(&s, "File: %s", ctx->file);
+	file_txt.s = s; /* work around "const" mismatch */
+
+	if (ctx->rotated) {
+		sheet_txt.rot = file_txt.rot = 90;
+		sheet_txt.x -= HSHEET_FIELD_OFFSET;
+		sheet_txt.y += ctx->h;
+		file_txt.x += ctx->w + HSHEET_FIELD_OFFSET;
+		file_txt.y += ctx->h;
+	} else {
+		sheet_txt.y -= HSHEET_FIELD_OFFSET;
+		file_txt.y += ctx->h + HSHEET_FIELD_OFFSET;
+	}
+
+	text_fig(&sheet_txt, COLOR_HSHEET_SHEET, LAYER_HSHEET_FIELD);
+	text_fig(&file_txt, COLOR_HSHEET_FILE, LAYER_HSHEET_FIELD);
+
+	free((void *) ctx->sheet);
+	free((void *) ctx->file);
+}
+
+
 /* ----- Schematics parser ------------------------------------------------- */
 
 
@@ -339,6 +416,9 @@ bool sch_parse(struct sch_ctx *ctx, const char *line)
 		}
 		if (sscanf(line, "$Sheet%n", &n) == 0 && n) {
 			ctx->state = sch_sheet;
+			ctx->sheet = NULL;
+			ctx->file = NULL;
+			ctx->rotated = 0;
 			return 1;
 		}
 
@@ -471,13 +551,14 @@ bool sch_parse(struct sch_ctx *ctx, const char *line)
 	case sch_sheet:
 		if (sscanf(line, "$EndSheet%n", &n) == 0 && n) {
 			ctx->state = sch_basic;
+			do_hsheet_text(ctx);
 			return 1;
 		}
 		if (sscanf(line, "S %d %d %u %u",
 		    &ctx->x, &ctx->y, &ctx->w, &ctx->h) == 4) {
 			fig_rect(ctx->x, ctx->y,
 			    ctx->x + ctx->w, ctx->y + ctx->h,
-			    COLOR_HSHEET, COLOR_NONE, LAYER_HSHEET);
+			    COLOR_HSHEET_BOX, COLOR_NONE, LAYER_HSHEET_BOX);
 			return 1;
 		}
 		if (sscanf(line, "U %*x%n", &n) == 0 && n)

sch2fig/sch.h

@@ -54,6 +54,11 @@ struct sch_ctx {
 	/* subsheet */
 
 	unsigned h, w;
+	const char *sheet;
+	unsigned sheet_dim;
+	const char *file;
+	unsigned file_dim;
+	bool rotated;
 
 	unsigned lineno;
 };

sch2fig/style.h

@@ -22,6 +22,7 @@
 #define	COLOR_CYAN3		16
 #define	COLOR_RED4		18
 #define	COLOR_RED3		19
+#define	COLOR_MAGENTA4		21
 #define	COLOR_BROWN2		26
 
 #define	COLOR_COMP_DWG		COLOR_RED4
@@ -32,7 +33,9 @@
 #define	COLOR_NOCONN		COLOR_BLUE
 #define	COLOR_GLABEL		COLOR_RED4
 #define	COLOR_HLABEL		COLOR_BROWN2	/* @@@ */
-#define	COLOR_HSHEET		COLOR_HLABEL
+#define	COLOR_HSHEET_BOX	COLOR_MAGENTA4
+#define	COLOR_HSHEET_SHEET	COLOR_FIELD
+#define	COLOR_HSHEET_FILE	COLOR_HLABEL
 #define	COLOR_LABEL		COLOR_BLACK
 #define	COLOR_FIELD		COLOR_CYAN4
 #define	COLOR_PIN_NAME		COLOR_FIELD
@@ -49,7 +52,8 @@
 #define	LAYER_FIELD		60
 #define	LAYER_PIN_NAME		LAYER_FIELD
 #define	LAYER_PIN_NUMBER	LAYER_FIELD
-#define	LAYER_HSHEET		70
+#define	LAYER_HSHEET_FIELD	LAYER_FIELD
+#define	LAYER_HSHEET_BOX	70
 #define	LAYER_LINES		100
 #define	LAYER_COMP_DWG		120
 #define	LAYER_COMP_DWG_BG	200
@@ -66,5 +70,6 @@
 #define	GLABEL_OFFSET		20
 #define	HLABEL_OFFSET_F		0.4	// * text size
 #define	PIN_NUM_OFFSET		15	// eeschema has more like 10
+#define	HSHEET_FIELD_OFFSET	10
 
 #endif /* !STYLE_H */