From 7115b4e8864b94f499335002d357b27263511ea6 Mon Sep 17 00:00:00 2001
From: Michael Peters <peters@is-peters-oryx.ra.local>
Date: Thu, 13 Oct 2022 11:31:17 -0700
Subject: [PATCH] font2 patch

---
 config.def.h                                  |   6 ++
 config.h                                      |   4 +
 .../st-appsync-20200618-b27a383.diff          |   0
 .../{todo => in-progress}/st-font2-0.8.5.diff |   0
 x.c                                           | 101 ++++++++++++++++++
 5 files changed, 111 insertions(+)
 rename patches/{in-progress => done}/st-appsync-20200618-b27a383.diff (100%)
 rename patches/{todo => in-progress}/st-font2-0.8.5.diff (100%)

diff --git a/config.def.h b/config.def.h
index 1beb5bd..bd781cd 100644
--- a/config.def.h
+++ b/config.def.h
@@ -6,6 +6,12 @@
  * font: see http://freedesktop.org/software/fontconfig/fontconfig-user.html
  */
 static char *font = "Liberation Mono:pixelsize=12:antialias=true:autohint=true";
+/* Spare fonts */
+static char *font2[] = {
+/*	"Inconsolata for Powerline:pixelsize=12:antialias=true:autohint=true", */
+/*	"Hack Nerd Font Mono:pixelsize=11:antialias=true:autohint=true", */
+};
+
 static int borderpx = 2;
 
 /*
diff --git a/config.h b/config.h
index 52beb02..79746ec 100644
--- a/config.h
+++ b/config.h
@@ -6,6 +6,10 @@
  * font: see http://freedesktop.org/software/fontconfig/fontconfig-user.html
  */
 static char *font = "Hack Nerd Font:pixelsize=14:antialias=true:autohint=true";
+/* Spare fonts */
+static char *font2[] = {
+    "Symbola:pixelsize=14:antialias=true:autohint=true",
+};
 static int borderpx = 2;
 
 /*
diff --git a/patches/in-progress/st-appsync-20200618-b27a383.diff b/patches/done/st-appsync-20200618-b27a383.diff
similarity index 100%
rename from patches/in-progress/st-appsync-20200618-b27a383.diff
rename to patches/done/st-appsync-20200618-b27a383.diff
diff --git a/patches/todo/st-font2-0.8.5.diff b/patches/in-progress/st-font2-0.8.5.diff
similarity index 100%
rename from patches/todo/st-font2-0.8.5.diff
rename to patches/in-progress/st-font2-0.8.5.diff
diff --git a/x.c b/x.c
index 290c0ea..57b71ef 100644
--- a/x.c
+++ b/x.c
@@ -158,6 +158,8 @@ static void xhints(void);
 static int xloadcolor(int, const char *, Color *);
 static int xloadfont(Font *, FcPattern *);
 static void xloadfonts(const char *, double);
+static int xloadsparefont(FcPattern *, int);
+static void xloadsparefonts(void);
 static void xunloadfont(Font *);
 static void xunloadfonts(void);
 static void xsetenv(void);
@@ -308,6 +310,7 @@ zoomabs(const Arg *arg)
 {
 	xunloadfonts();
 	xloadfonts(usedfont, arg->f);
+	xloadsparefonts();
 	cresize(0, 0);
 	redraw();
 	xhints();
@@ -1059,6 +1062,101 @@ xloadfonts(const char *fontstr, double fontsize)
 	FcPatternDestroy(pattern);
 }
 
+int
+xloadsparefont(FcPattern *pattern, int flags)
+{
+	FcPattern *match;
+	FcResult result;
+
+	match = FcFontMatch(NULL, pattern, &result);
+	if (!match) {
+		return 1;
+	}
+
+	if (!(frc[frclen].font = XftFontOpenPattern(xw.dpy, match))) {
+		FcPatternDestroy(match);
+		return 1;
+	}
+
+	frc[frclen].flags = flags;
+	/* Believe U+0000 glyph will present in each default font */
+	frc[frclen].unicodep = 0;
+	frclen++;
+
+	return 0;
+}
+
+void
+xloadsparefonts(void)
+{
+	FcPattern *pattern;
+	double sizeshift, fontval;
+	int fc;
+	char **fp;
+
+	if (frclen != 0)
+		die("can't embed spare fonts. cache isn't empty");
+
+	/* Calculate count of spare fonts */
+	fc = sizeof(font2) / sizeof(*font2);
+	if (fc == 0)
+		return;
+
+	/* Allocate memory for cache entries. */
+	if (frccap < 4 * fc) {
+		frccap += 4 * fc - frccap;
+		frc = xrealloc(frc, frccap * sizeof(Fontcache));
+	}
+
+	for (fp = font2; fp - font2 < fc; ++fp) {
+
+		if (**fp == '-')
+			pattern = XftXlfdParse(*fp, False, False);
+		else
+			pattern = FcNameParse((FcChar8 *)*fp);
+
+		if (!pattern)
+			die("can't open spare font %s\n", *fp);
+
+		if (defaultfontsize > 0) {
+			sizeshift = usedfontsize - defaultfontsize;
+			if (sizeshift != 0 &&
+					FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
+					FcResultMatch) {
+				fontval += sizeshift;
+				FcPatternDel(pattern, FC_PIXEL_SIZE);
+				FcPatternDel(pattern, FC_SIZE);
+				FcPatternAddDouble(pattern, FC_PIXEL_SIZE, fontval);
+			}
+		}
+
+		FcPatternAddBool(pattern, FC_SCALABLE, 1);
+
+		FcConfigSubstitute(NULL, pattern, FcMatchPattern);
+		XftDefaultSubstitute(xw.dpy, xw.scr, pattern);
+
+		if (xloadsparefont(pattern, FRC_NORMAL))
+			die("can't open spare font %s\n", *fp);
+
+		FcPatternDel(pattern, FC_SLANT);
+		FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
+		if (xloadsparefont(pattern, FRC_ITALIC))
+			die("can't open spare font %s\n", *fp);
+
+		FcPatternDel(pattern, FC_WEIGHT);
+		FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
+		if (xloadsparefont(pattern, FRC_ITALICBOLD))
+			die("can't open spare font %s\n", *fp);
+
+		FcPatternDel(pattern, FC_SLANT);
+		FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
+		if (xloadsparefont(pattern, FRC_BOLD))
+			die("can't open spare font %s\n", *fp);
+
+		FcPatternDestroy(pattern);
+	}
+}
+
 void
 xunloadfont(Font *f)
 {
@@ -1168,6 +1266,9 @@ xinit(int cols, int rows)
 	usedfont = (opt_font == NULL)? font : opt_font;
 	xloadfonts(usedfont, 0);
 
+	/* spare fonts */
+	xloadsparefonts();
+
 	/* colors */
 	xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None);
 	xloadcols();