smu

commit bcfa37c77dc9519b54e05813b1f73dbbf0f0b4c9
parent fbc3d2b11f52754309998077a50a757278671759
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Tue, 11 May 2021 17:30:03 +0200

add -l option to set lazyload hint for images that have dimensions

Diffstat:
M
smu.1
 | 
3
+++
M
smu.c
 | 
8
++++++--

2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/smu.1 b/smu.1
@@ -7,6 +7,7 @@
 .Sh SYNOPSIS
 .Nm
 .Op Fl h
+.Op Fl l
 .Op Fl n
 .Op Fl v
 .Sh DESCRIPTION
@@ -16,6 +17,8 @@ The options are as follows:
 .Bl -tag -width Ds
 .It Fl h
 prints usage information to stderr, then exits.
+.It Fl l
+set loading="lazy" hint attribute for images if it has a width and a height.
 .It Fl n
 escapes all HTML tags.
 .It Fl v
diff --git a/smu.c b/smu.c
@@ -41,7 +41,7 @@ static void process(const char *begin, const char *end, int isblock);     /* Pro
 static Parser parsers[] = { dounderline, docomment, dolineprefix,
                             dolist, doparagraph, dogtlt, dosurround, dolink,
                             doshortlink, dohtml, doamp, doreplace };
-static int nohtml = 0;
+static int lazyimg = 0, nohtml = 0;
 
 static Tag lineprefix[] = {
 	{ "    ",	0,	"<pre><code>", "\n</code></pre>" },
@@ -337,6 +337,8 @@ dolink(const char *begin, const char *end, int newblock)
 			printf("width=\"%ld\" ", width);
 		if (height > 0)
 			printf("height=\"%ld\" ", height);
+		if (width > 0 && height > 0 && lazyimg)
+			fputs("loading=\"lazy\" ", stdout);
 		fputs("/>", stdout);
 	} else {
 		fputs("<a href=\"", stdout);
@@ -692,7 +694,7 @@ process(const char *begin, const char *end, int newblock)
 void
 usage(char **argv)
 {
-	eprint("usage: %s [-n]\n\t-n escape HTML strictly\n", argv[0]);
+	eprint("usage: %s [-l] [-n]\n", argv[0]);
 }
 
 int
@@ -710,6 +712,8 @@ main(int argc, char *argv[])
 			eprint("smu v%s\n", VERSION);
 		else if (!strcmp("-n", argv[i]))
 			nohtml = 1;
+		else if (!strcmp("-l", argv[i]))
+			lazyimg = 1;
 		else
 			usage(argv);
 	}