Add OSC 8 hyperlink support

This commit adds support for the OSC 8 hyperlink escape sequence [1]. As
this is not a mature feature and there seem to be outstanding security
concerns [2], the setting that controls whether or not OSC 8 is
interpreted is disabled by default.

Just like gnome-terminal, weltschmerz will display a tooltip with the
canonicalized URI when hovering over a hyperlink.

[1] https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
[2] https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda#security

1 files changed, 28 insertions, 9 deletions

diff --git a/terminal.vala b/terminal.vala
index 99c21ce..5f4f4e0 100644
--- a/terminal.vala
+++ b/terminal.vala
@@ -25,14 +25,17 @@ class Terminal : Gtk.Overlay {
 	[GtkChild] Gtk.Label infobar_label;
 	[GtkChild] Gtk.Menu standard_context_menu;
 	[GtkChild] Gtk.Menu url_context_menu;
+	[GtkChild] Gtk.Menu hyperlink_context_menu;
 	[GtkChild] Gtk.MenuItem copy_item;
 	[GtkChild] Gtk.Revealer search_revealer;
 	[GtkChild] Gtk.ScrolledWindow scrolled_window;
 	[GtkChild] Gtk.SearchEntry search_entry;
 	[GtkChild] Vte.Terminal vte;
+	Gtk.Clipboard clipboard;
 
 	bool has_search;
 	string url_match;
+	string hyperlink_match;
 	uint? infobar_timeout_id;
 	double scroll_delta;
 
@@ -45,8 +48,11 @@ class Terminal : Gtk.Overlay {
 		vte.search_set_wrap_around(true);
 
 		url_context_menu.attach_to_widget(vte, null);
+		hyperlink_context_menu.attach_to_widget(vte, null);
 		standard_context_menu.attach_to_widget(vte, null);
 
+		clipboard = Gtk.Clipboard.get_default(window.get_display());
+
 		try {
 			var regex = new Vte.Regex.for_match(URL_REGEX, URL_REGEX.length, PCRE2_CASELESS | PCRE2_MULTILINE);
 			vte.match_add_regex(regex, 0);
@@ -69,6 +75,8 @@ class Terminal : Gtk.Overlay {
 		Gtk.PolicyType policy = conf.scrollbar ? Gtk.PolicyType.AUTOMATIC : Gtk.PolicyType.NEVER;
 		scrolled_window.set_policy(policy, policy);
 
+		vte.set_allow_hyperlink(conf.allow_hyperlinks);
+
 		vte.set_font(conf.font);
 		var geometry = Gdk.Geometry() {
 			// This must be kept in sync with the padding size in terminal.css
@@ -262,9 +270,9 @@ class Terminal : Gtk.Overlay {
 		search_button_down.set_sensitive(has_search);
 	}
 
-	void url_match_open() {
+	void uri_open(string uri) {
 		try {
-			AppInfo.launch_default_for_uri(url_match, get_display().get_app_launch_context());
+			AppInfo.launch_default_for_uri(uri, get_display().get_app_launch_context());
 		} catch (Error e) {
 			warning(e.message);
 			infobar_show(e.message, Gtk.MessageType.ERROR);
@@ -272,13 +280,12 @@ class Terminal : Gtk.Overlay {
 	}
 
 	[GtkCallback]
-	void url_match_copy() {
-		if (url_match == null) {
-			return;
+	void uri_copy() {
+		if (url_match != null) {
+			clipboard.set_text(url_match, -1);
+		} else if (hyperlink_match != null) {
+			clipboard.set_text(hyperlink_match, -1);
 		}
-
-		Gtk.Clipboard clipboard = Gtk.Clipboard.get_default(window.get_display());
-		clipboard.set_text(url_match, -1);
 	}
 
 	void adjust_font_scale(double scale) {
@@ -309,9 +316,12 @@ class Terminal : Gtk.Overlay {
 	bool vte_button_press(Gdk.EventButton event) {
 		if (match_button(event, 0, Gdk.BUTTON_SECONDARY)) {
 			url_match = vte.match_check_event(event, null);
+			hyperlink_match = vte.hyperlink_check_event(event);
 
 			if (url_match != null) {
 				url_context_menu.popup_at_pointer(event);
+			} else if (hyperlink_match != null) {
+				hyperlink_context_menu.popup_at_pointer(event);
 			} else {
 				copy_item.set_sensitive(vte.get_has_selection());
 				standard_context_menu.popup_at_pointer(event);
@@ -326,8 +336,12 @@ class Terminal : Gtk.Overlay {
 	bool vte_button_release(Gdk.EventButton event) {
 		if (match_button(event, 0, Gdk.BUTTON_PRIMARY)) {
 			url_match = vte.match_check_event(event, null);
+			hyperlink_match = vte.hyperlink_check_event(event);
+
 			if (url_match != null && !vte.get_has_selection()) {
-				url_match_open();
+				uri_open(url_match);
+			} else if (hyperlink_match != null && !vte.get_has_selection()) {
+				uri_open(hyperlink_match);
 			}
 		}
 
@@ -398,6 +412,11 @@ class Terminal : Gtk.Overlay {
 	}
 
 	[GtkCallback]
+	void vte_hyperlink_hover(string? uri, Gdk.Rectangle? box) {
+		vte.set_tooltip_text(Utils.normalize_uri(uri));
+	}
+
+	[GtkCallback]
 	void window_set_title() {
 		string title = null;
 		if (vte.window_title.length > 0) {