Add support for OSC 8 hyperlinks (HTML-like anchors)

backport of 1c6f8db736efc62d9a9b38bfbc43ec03c8544696
from gnome-terminal

7 files changed, 173 insertions, 13 deletions

diff --git a/configure.ac b/configure.ac
index 8c489b4..f048c6d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,7 +41,7 @@ AM_PROG_LIBTOOL
 GLIB_REQUIRED=2.50.0
 GIO_REQUIRED=2.50.0
 GTK_REQUIRED=3.22.0
-VTE_REQUIRED=0.48
+VTE_REQUIRED=0.49.1
 DCONF_REQUIRED=0.13.4
 
 PKG_CHECK_MODULES([TERM],
diff --git a/src/terminal-screen.c b/src/terminal-screen.c
index defe083..7282f6d 100644
--- a/src/terminal-screen.c
+++ b/src/terminal-screen.c
@@ -137,6 +137,9 @@ static void terminal_screen_icon_title_changed        (VteTerminal *vte_terminal
 
 static void update_color_scheme                      (TerminalScreen *screen);
 
+static char* terminal_screen_check_hyperlink (TerminalScreen *screen,
+        GdkEvent *event);
+
 static gboolean terminal_screen_format_title (TerminalScreen *screen, const char *raw_title, char **old_cooked_title);
 
 static void terminal_screen_cook_title      (TerminalScreen *screen);
@@ -353,6 +356,8 @@ terminal_screen_init (TerminalScreen *screen)
 	vte_terminal_set_bold_is_bright (VTE_TERMINAL (screen), TRUE);
 #endif
 
+	vte_terminal_set_allow_hyperlink (VTE_TERMINAL (screen), TRUE);
+
 	priv->child_pid = -1;
 
 	priv->font_scale = PANGO_SCALE_MEDIUM;
@@ -1680,6 +1685,7 @@ terminal_screen_popup_info_unref (TerminalScreenPopupInfo *info)
 		return;
 
 	g_object_unref (info->screen);
+	g_free (info->hyperlink);
 	g_free (info->url);
 	g_slice_free (TerminalScreenPopupInfo, info);
 }
@@ -1707,24 +1713,39 @@ terminal_screen_button_press (GtkWidget      *widget,
 	TerminalScreen *screen = TERMINAL_SCREEN (widget);
 	gboolean (* button_press_event) (GtkWidget*, GdkEventButton*) =
 	    GTK_WIDGET_CLASS (terminal_screen_parent_class)->button_press_event;
+	char *hyperlink;
 	char *url;
-	int url_flavor = 0;
+	int url_flavor = FLAVOR_AS_IS;
 	guint state;
 
 	state = event->state & gtk_accelerator_get_default_mod_mask ();
-
+	hyperlink = terminal_screen_check_hyperlink (screen, (GdkEvent*)event);
 	url = terminal_screen_check_match (screen, (GdkEvent*)event, &url_flavor);
 
-	if (url != NULL &&
-	        (event->button == 1 || event->button == 2) &&
-	        (state & GDK_CONTROL_MASK))
+	// left or middle button with Ctrl
+	if ((event->button == 1 || event->button == 2) &&
+		(state & GDK_CONTROL_MASK))
 	{
 		gboolean handled = FALSE;
 
+		if (hyperlink != NULL)
+			g_signal_emit (screen, signals[MATCH_CLICKED], 0,
+			               hyperlink,
+			               FLAVOR_AS_IS,
+			               state,
+			               &handled);
+
+		if (handled) {
+			g_free (url);
+			g_free (hyperlink);
+			return TRUE; /* don't do anything else such as select with the click */
+		}
+
 #ifdef ENABLE_SKEY
 		if (url_flavor != FLAVOR_SKEY ||
 		        terminal_profile_get_property_boolean (screen->priv->profile, TERMINAL_PROFILE_USE_SKEY))
 #endif
+		if (url != NULL)
 		{
 			g_signal_emit (screen, signals[MATCH_CLICKED], 0,
 			               url,
@@ -1733,12 +1754,14 @@ terminal_screen_button_press (GtkWidget      *widget,
 			               &handled);
 		}
 
-		g_free (url);
-
-		if (handled)
+		if (handled) {
+			g_free (url);
+			g_free (hyperlink);
 			return TRUE; /* don't do anything else such as select with the click */
+		}
 	}
 
+	// right button with no Ctrl, Alt or Shift
 	if (event->button == 3 &&
 	        (state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK | GDK_MOD1_MASK)) == 0)
 	{
@@ -1749,6 +1772,7 @@ terminal_screen_button_press (GtkWidget      *widget,
 		info->state = state;
 		info->timestamp = event->time;
 		info->url = url; /* adopted */
+		info->hyperlink = hyperlink; /* adopted */
 		info->flavor = url_flavor;
 
 		g_signal_emit (screen, signals[SHOW_POPUP_MENU], 0, info);
@@ -1757,6 +1781,9 @@ terminal_screen_button_press (GtkWidget      *widget,
 		return TRUE;
 	}
 
+	g_free (url);
+	g_free (hyperlink);
+
 	/* default behavior is to let the terminal widget deal with it */
 	if (button_press_event)
 		return button_press_event (widget, event);
@@ -2381,6 +2408,13 @@ terminal_screen_url_match_remove (TerminalScreen *screen)
 }
 
 static char*
+terminal_screen_check_hyperlink (TerminalScreen *screen,
+                                 GdkEvent       *event)
+{
+	return vte_terminal_hyperlink_check_event (VTE_TERMINAL (screen), event);
+}
+
+static char*
 terminal_screen_check_match (TerminalScreen *screen,
                              GdkEvent  *event,
                              int       *flavor)
diff --git a/src/terminal-screen.h b/src/terminal-screen.h
index c5cdb5d..ba1c218 100644
--- a/src/terminal-screen.h
+++ b/src/terminal-screen.h
@@ -148,6 +148,7 @@ struct _TerminalScreenPopupInfo
 	TerminalWindow *window;
 	TerminalScreen *screen;
 	char *url;
+	char *hyperlink;
 	TerminalURLFlavor flavor;
 	guint button;
 	guint state;
diff --git a/src/terminal-util.c b/src/terminal-util.c
index ede72da..d0f1864 100644
--- a/src/terminal-util.c
+++ b/src/terminal-util.c
@@ -22,6 +22,7 @@
 
 #include <config.h>
 
+#define _GNU_SOURCE /* for strchrnul */
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -707,6 +708,55 @@ terminal_util_add_proxy_env (GHashTable *env_table)
 	g_object_unref (settings_socks);
 }
 
+/**
+ * terminal_util_hyperlink_uri_label:
+ * @uri: a URI
+ *
+ * Formats @uri to be displayed in a tooltip.
+ * Performs URI-decoding and converts IDN hostname to UTF-8.
+ *
+ * Returns: (transfer full): The human readable URI as plain text
+ */
+char *terminal_util_hyperlink_uri_label (const char *uri)
+{
+	char *unesc = NULL;
+	gboolean replace_hostname;
+
+	if (uri == NULL)
+		return NULL;
+
+	unesc = g_uri_unescape_string(uri, NULL);
+	if (unesc == NULL)
+		unesc = g_strdup(uri);
+
+	if (g_ascii_strncasecmp(unesc, "ftp://", 6) == 0 ||
+		g_ascii_strncasecmp(unesc, "http://", 7) == 0 ||
+		g_ascii_strncasecmp(unesc, "https://", 8) == 0)
+	{
+		char *unidn = NULL;
+
+		char *hostname = strchr(unesc, '/') + 2;
+		char *hostname_end = strchrnul(hostname, '/');
+		char save = *hostname_end;
+		*hostname_end = '\0';
+		unidn = g_hostname_to_unicode(hostname);
+		replace_hostname = unidn != NULL && g_ascii_strcasecmp(unidn, hostname) != 0;
+		*hostname_end = save;
+		if (replace_hostname)
+		{
+			char *new_unesc = g_strdup_printf("%.*s%s%s",
+			                                  (int) (hostname - unesc),
+			                                  unesc,
+			                                  unidn,
+			                                  hostname_end);
+			g_free(unesc);
+			unesc = new_unesc;
+		}
+		g_free(unidn);
+	}
+	return unesc;
+}
+
 /* Bidirectional object/widget binding */
 
 typedef struct
diff --git a/src/terminal-util.h b/src/terminal-util.h
index 190672f..f1ccd43 100644
--- a/src/terminal-util.h
+++ b/src/terminal-util.h
@@ -104,6 +104,8 @@ void terminal_util_bind_object_property_to_widget (GObject *object,
 
 void terminal_util_x11_clear_demands_attention (GdkWindow *window);
 
+char *terminal_util_hyperlink_uri_label (const char *str);
+
 G_END_DECLS
 
 #endif /* TERMINAL_UTIL_H */
diff --git a/src/terminal-window.c b/src/terminal-window.c
index d23fd87..6517d8d 100644
--- a/src/terminal-window.c
+++ b/src/terminal-window.c
@@ -1366,6 +1366,38 @@ handle_tab_droped_on_desktop (GtkNotebook *source_notebook,
 /* Terminal screen popup menu handling */
 
 static void
+popup_open_hyperlink_callback (GtkAction *action,
+                               TerminalWindow *window)
+{
+    TerminalWindowPrivate *priv = window->priv;
+    TerminalScreenPopupInfo *info = priv->popup_info;
+
+    if (info == NULL)
+        return;
+
+    terminal_util_open_url (GTK_WIDGET (window), info->hyperlink, FLAVOR_AS_IS,
+                            gtk_get_current_event_time ());
+}
+
+static void
+popup_copy_hyperlink_callback (GtkAction *action,
+                               TerminalWindow *window)
+{
+    TerminalWindowPrivate *priv = window->priv;
+    TerminalScreenPopupInfo *info = priv->popup_info;
+    GtkClipboard *clipboard;
+
+    if (info == NULL)
+        return;
+
+    if (info->hyperlink == NULL)
+        return;
+
+    clipboard = gtk_widget_get_clipboard (GTK_WIDGET (window), GDK_SELECTION_CLIPBOARD);
+    gtk_clipboard_set_text (clipboard, info->hyperlink, -1);
+}
+
+static void
 popup_open_url_callback (GtkAction *action,
                          TerminalWindow *window)
 {
@@ -1476,7 +1508,7 @@ popup_clipboard_targets_received_cb (GtkClipboard *clipboard,
     TerminalScreen *screen = info->screen;
     GtkWidget *popup_menu;
     GtkAction *action;
-    gboolean can_paste, can_paste_uris, show_link, show_email_link, show_call_link, show_input_method_menu;
+    gboolean can_paste, can_paste_uris, show_hyperlink, show_link, show_email_link, show_call_link, show_input_method_menu;
     int n_pages;
 
     if (!gtk_widget_get_realized (GTK_WIDGET (screen)))
@@ -1494,11 +1526,16 @@ popup_clipboard_targets_received_cb (GtkClipboard *clipboard,
 
     can_paste = targets != NULL && gtk_targets_include_text (targets, n_targets);
     can_paste_uris = targets != NULL && gtk_targets_include_uri (targets, n_targets);
-    show_link = info->url != NULL && (info->flavor == FLAVOR_AS_IS || info->flavor == FLAVOR_DEFAULT_TO_HTTP);
-    show_email_link = info->url != NULL && info->flavor == FLAVOR_EMAIL;
-    show_call_link = info->url != NULL && info->flavor == FLAVOR_VOIP_CALL;
+    show_hyperlink = info->hyperlink != NULL;
+    show_link = !show_hyperlink && info->url != NULL && (info->flavor == FLAVOR_AS_IS || info->flavor == FLAVOR_DEFAULT_TO_HTTP);
+    show_email_link = !show_hyperlink && info->url != NULL && info->flavor == FLAVOR_EMAIL;
+    show_call_link = !show_hyperlink && info->url != NULL && info->flavor == FLAVOR_VOIP_CALL;
 
     G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
+    action = gtk_action_group_get_action (priv->action_group, "PopupOpenHyperlink");
+    gtk_action_set_visible (action, show_hyperlink);
+    action = gtk_action_group_get_action (priv->action_group, "PopupCopyHyperlinkAddress");
+    gtk_action_set_visible (action, show_hyperlink);
     action = gtk_action_group_get_action (priv->action_group, "PopupSendEmail");
     gtk_action_set_visible (action, show_email_link);
     action = gtk_action_group_get_action (priv->action_group, "PopupCopyEmailAddress");
@@ -2117,6 +2154,16 @@ terminal_window_init (TerminalWindow *window)
 
         /* Popup menu */
         {
+            "PopupOpenHyperlink", NULL, N_("_Open Hyperlink"), NULL,
+            NULL,
+            G_CALLBACK (popup_open_hyperlink_callback)
+        },
+        {
+            "PopupCopyHyperlinkAddress", NULL, N_("_Copy Hyperlink Address"), NULL,
+            NULL,
+            G_CALLBACK (popup_copy_hyperlink_callback)
+        },
+        {
             "PopupSendEmail", NULL, N_("_Send Mail To…"), NULL,
             NULL,
             G_CALLBACK (popup_open_url_callback)
@@ -2596,6 +2643,23 @@ sync_screen_icon_title_set (TerminalScreen *screen,
     /* Re-setting the right title will be done by the notify::title handler which comes after this one */
 }
 
+static void
+screen_hyperlink_hover_uri_changed (TerminalScreen *screen,
+                                    const char *uri,
+                                    const GdkRectangle *bbox G_GNUC_UNUSED,
+                                    TerminalWindow *window G_GNUC_UNUSED)
+{
+    char *label = NULL;
+
+    if (!gtk_widget_get_realized (GTK_WIDGET (screen)))
+        return;
+
+    label = terminal_util_hyperlink_uri_label (uri);
+
+    gtk_widget_set_tooltip_text (GTK_WIDGET (screen), label);
+    g_free(label);
+}
+
 /* Notebook callbacks */
 
 static void
@@ -3209,6 +3273,8 @@ notebook_page_added_callback (GtkWidget       *notebook,
                       G_CALLBACK (sync_screen_icon_title_set), window);
     g_signal_connect (screen, "selection-changed",
                       G_CALLBACK (terminal_window_update_copy_sensitivity), window);
+    g_signal_connect (screen, "hyperlink-hover-uri-changed",
+                      G_CALLBACK (screen_hyperlink_hover_uri_changed), window);
 
     g_signal_connect (screen, "show-popup-menu",
                       G_CALLBACK (screen_show_popup_menu_callback), window);
@@ -3289,6 +3355,10 @@ notebook_page_removed_callback (GtkWidget       *notebook,
                                           G_CALLBACK (terminal_window_update_copy_sensitivity),
                                           window);
 
+    g_signal_handlers_disconnect_by_func (G_OBJECT (screen),
+                                          G_CALLBACK (screen_hyperlink_hover_uri_changed),
+                                          window);
+
     g_signal_handlers_disconnect_by_func (screen,
                                           G_CALLBACK (screen_show_popup_menu_callback),
                                           window);
diff --git a/src/terminal.xml b/src/terminal.xml
index 263dce4..281dc90 100644
--- a/src/terminal.xml
+++ b/src/terminal.xml
@@ -83,6 +83,9 @@
   </menubar>
 
   <popup name="Popup" action="Popup">
+    <menuitem action="PopupOpenHyperlink" />
+    <menuitem action="PopupCopyHyperlinkAddress" />
+    <separator />
     <menuitem action="PopupSendEmail" />
     <menuitem action="PopupCopyEmailAddress" />
     <menuitem action="PopupCall" />