Add configuration option for PDF-JS-viewer

config.def.h

@@ -34,6 +34,7 @@ static Parameter defconfig[ParameterLast] = {
 	[KioskMode]           =       { { .i = 0 },     },
 	[LoadImages]          =       { { .i = 1 },     },
 	[MediaManualPlay]     =       { { .i = 1 },     },
+	[PDFJSviewer]         =       { { .i = 1 },     },
 	[PreferredLanguages]  =       { { .v = (char *[]){ NULL } }, },
 	[RunInFullscreen]     =       { { .i = 0 },     },
 	[ScrollBars]          =       { { .i = 1 },     },

surf.c

@@ -71,6 +71,7 @@ typedef enum {
 	KioskMode,
 	LoadImages,
 	MediaManualPlay,
+	PDFJSviewer,
 	PreferredLanguages,
 	RunInFullscreen,
 	ScrollBars,
@@ -285,6 +286,7 @@ static ParamName loadcommitted[] = {
 	Inspector,
 //	KioskMode,
 	MediaManualPlay,
+	PDFJSviewer,
 	RunInFullscreen,
 	ScrollBars,
 	SiteQuirks,
@@ -817,6 +819,8 @@ setparameter(Client *c, int refresh, ParamName p, const Arg *a)
 		webkit_settings_set_media_playback_requires_user_gesture(
 		    c->settings, a->i);
 		break;
+	case PDFJSviewer:
+		return; /* do nothing */
 	case PreferredLanguages:
 		return; /* do nothing */
 	case RunInFullscreen:
@@ -1701,7 +1705,7 @@ decideresource(WebKitPolicyDecision *d, Client *c)
 	    && !g_str_has_prefix(uri, "webkit://")
 	    && !g_str_has_prefix(uri, "data:")
 	    && !g_str_has_prefix(uri, "blob:")
-	    && !g_str_has_prefix(uri, "webkit-pdfjs-viewer://")
+	    && !(g_str_has_prefix(uri, "webkit-pdfjs-viewer://") && curconfig[PDFJSviewer].val.i)
 	    && strlen(uri) > 0) {
 		for (i = 0; i < strlen(uri); i++) {
 			if (!g_ascii_isprint(uri[i])) {