MARQUEE MODE

Only works on ASCII titles so far.  Crashes on UTF-8 titles.

6 files changed, 186 insertions, 7 deletions

diff --git a/src/application.c b/src/application.c
index d4fa802..531eb53 100644
--- a/src/application.c
+++ b/src/application.c
@@ -70,3 +70,49 @@ mq_application_delete_window(MqApplication *application, MqWindow *window)
 		gtk_main_quit();
 	}
 }
+
+static gboolean
+scroll_tab_labels(MqApplication *application)
+{
+	GList *item;
+
+	if (application->marquee_mode) {
+		for (item = application->windows; item; item = item->next) {
+			mq_window_scroll_tab_labels(item->data);
+		}
+		return G_SOURCE_CONTINUE;
+	} else {
+		return G_SOURCE_REMOVE;
+	}
+}
+
+void
+mq_application_marquee_mode_activate(MqApplication *application)
+{
+	GList *item;
+
+	for (item = application->windows; item; item = item->next) {
+		mq_window_begin_scrolling_tab_labels(item->data);
+	}
+
+	application->marquee_mode = TRUE;
+	g_timeout_add(125, (GSourceFunc) scroll_tab_labels, application);
+}
+
+void
+mq_application_marquee_mode_deactivate(MqApplication *application)
+{
+	GList *item;
+
+	for (item = application->windows; item; item = item->next) {
+		mq_window_end_scrolling_tab_labels(item->data);
+	}
+
+	application->marquee_mode = FALSE;
+}
+
+gboolean
+mq_application_marquee_mode_on(MqApplication *application)
+{
+	return application->marquee_mode;
+}
diff --git a/src/application.h b/src/application.h
index a4b373c..901fd22 100644
--- a/src/application.h
+++ b/src/application.h
@@ -29,7 +29,8 @@ typedef struct MqApplication MqApplication;
 #include "window.h"
 
 struct MqApplication {
-	GList *windows;
+	GList    *windows;
+	gboolean  marquee_mode;
 };
 
 MqApplication *
@@ -44,4 +45,13 @@ mq_application_add_window(MqApplication *application, const gchar **uris);
 void
 mq_application_delete_window(MqApplication *application, MqWindow *window);
 
+void
+mq_application_marquee_mode_activate(MqApplication *application);
+
+void
+mq_application_marquee_mode_deactivate(MqApplication *application);
+
+gboolean
+mq_application_marquee_mode_on(MqApplication *application);
+
 #endif
diff --git a/src/tab.c b/src/tab.c
index 7ad667c..80d3972 100644
--- a/src/tab.c
+++ b/src/tab.c
@@ -28,6 +28,15 @@
 #include "tab-body.h"
 
 static void
+foreach_tab(MqTab *node, void (*cb)(MqTab *node))
+{
+	for (; node; node = node->next) {
+		cb(node);
+		foreach_tab(node->first_child, cb);
+	}
+}
+
+static void
 update_tab_image(MqTab *tab, GdkPixbuf *favicon)
 {
 	if (favicon) {
@@ -41,9 +50,11 @@ update_tab_image(MqTab *tab, GdkPixbuf *favicon)
 static void
 update_tab_label(MqTab *tab)
 {
-	gchar *label;
+	const gchar *title;
+	gchar       *label;
 
-	label = g_strdup_printf("%d. %s", tab->position, tab->title);
+	title = tab->scrolling ? tab->scrolled_title : tab->title;
+	label = g_strdup_printf("%d. %s", tab->position, title);
 	gtk_label_set_text(GTK_LABEL(tab->tab_label), label);
 	gtk_widget_set_tooltip_text(tab->tab, label);
 	g_free(label);
@@ -403,6 +414,9 @@ title_cb(WebKitWebView __attribute__((unused)) *web_view,
 	GParamSpec __attribute__((unused)) *paramspec, MqTab *tab)
 {
 	tab->title = webkit_web_view_get_title(tab->web_view);
+	if (tab->scrolling) {
+		tab->scrolled_title = g_strdup_printf("%s    ", tab->title);
+	}
 	update_tab_label(tab);
 	mq_window_update_tab_title(tab->window, tab->position, tab->title);
 }
@@ -439,6 +453,47 @@ init_non_root(const gchar *uri)
 	return tab;
 }
 
+static void
+scroll_tab_label(MqTab *tab)
+{
+	gchar c;
+	guint i;
+
+	/* Save the first character. */
+	c = tab->scrolled_title[0];
+
+	/* Shift all characters. */
+	for (i = 1; tab->scrolled_title[i]; ++i) {
+		tab->scrolled_title[i - 1] = tab->scrolled_title[i];
+	}
+
+	/* Set the last character. */
+	tab->scrolled_title[i - 1] = c;
+
+	update_tab_label(tab);
+}
+
+static void
+begin_scrolling_tab_label(MqTab *tab)
+{
+	PangoFontDescription *font_desc;
+
+	tab->scrolling = TRUE;
+	tab->scrolled_title = g_strdup_printf("%s    ", tab->title);
+
+	font_desc = pango_font_description_new();
+	pango_font_description_set_family_static(font_desc, "monospace");
+	gtk_widget_override_font(tab->tab_label, font_desc);
+}
+
+static void
+end_scrolling_tab_label(MqTab *tab)
+{
+	tab->scrolling = FALSE;
+
+	gtk_widget_override_font(tab->tab_label, NULL);
+}
+
 MqTab *
 mq_tab_new(const gchar *uri, MqTab *source)
 {
@@ -446,11 +501,17 @@ mq_tab_new(const gchar *uri, MqTab *source)
 
 	tab = init_non_root(uri);
 
-	append_sibling(tab, source);
-
 	tab->window = source->window;
 	tab->application = mq_window_get_application(tab->window);
 
+	if (mq_application_marquee_mode_on(tab->application)) {
+		begin_scrolling_tab_label(tab);
+	} else {
+		tab->scrolling = FALSE;
+	}
+
+	append_sibling(tab, source);
+
 	mq_window_insert_tab(tab->window, tab->container, tab->tab,
 		tab->position);
 
@@ -464,11 +525,17 @@ mq_tab_new_relative(const gchar *uri, MqTab *source)
 
 	tab = init_non_root(uri);
 
-	append_child(tab, source);
-
 	tab->window = source->window;
 	tab->application = mq_window_get_application(tab->window);
 
+	if (mq_application_marquee_mode_on(tab->application)) {
+		begin_scrolling_tab_label(tab);
+	} else {
+		tab->scrolling = FALSE;
+	}
+
+	append_child(tab, source);
+
 	mq_window_insert_tab(tab->window, tab->container, tab->tab,
 		tab->position);
 
@@ -533,3 +600,21 @@ mq_tab_seek(MqTab *node, guint position)
 	/* Recurse down the subtree. */
 	return mq_tab_seek(node->first_child, position);
 }
+
+void
+mq_tab_scroll_tab_labels(MqTab *root)
+{
+	foreach_tab(root->first_child, scroll_tab_label);
+}
+
+void
+mq_tab_begin_scrolling_tab_labels(MqTab *root)
+{
+	foreach_tab(root->first_child, begin_scrolling_tab_label);
+}
+
+void
+mq_tab_end_scrolling_tab_labels(MqTab *root)
+{
+	foreach_tab(root->first_child, end_scrolling_tab_label);
+}
diff --git a/src/tab.h b/src/tab.h
index 35e96b3..2802306 100644
--- a/src/tab.h
+++ b/src/tab.h
@@ -51,6 +51,8 @@ struct MqTab {
 	const gchar     *title;
 	WebKitWebView   *web_view;
 	GtkWidget       *popover;
+	gboolean         scrolling;
+	gchar           *scrolled_title;
 };
 
 MqTab *
@@ -74,4 +76,13 @@ mq_tab_get_title(MqTab *tab);
 MqTab *
 mq_tab_seek(MqTab *node, guint position);
 
+void
+mq_tab_scroll_tab_labels(MqTab *root);
+
+void
+mq_tab_begin_scrolling_tab_labels(MqTab *root);
+
+void
+mq_tab_end_scrolling_tab_labels(MqTab *root);
+
 #endif
diff --git a/src/window.c b/src/window.c
index 7244f1e..aa91f8b 100644
--- a/src/window.c
+++ b/src/window.c
@@ -147,3 +147,21 @@ mq_window_update_tab_title(MqWindow *window, guint position, const gchar *title)
 		set_title(window, title);
 	}
 }
+
+void
+mq_window_scroll_tab_labels(MqWindow *window)
+{
+	mq_tab_scroll_tab_labels(window->root_tab);
+}
+
+void
+mq_window_begin_scrolling_tab_labels(MqWindow *window)
+{
+	mq_tab_begin_scrolling_tab_labels(window->root_tab);
+}
+
+void
+mq_window_end_scrolling_tab_labels(MqWindow *window)
+{
+	mq_tab_end_scrolling_tab_labels(window->root_tab);
+}
diff --git a/src/window.h b/src/window.h
index e5a6314..26d02b3 100644
--- a/src/window.h
+++ b/src/window.h
@@ -57,4 +57,13 @@ void
 mq_window_update_tab_title(MqWindow *window, guint position,
 	const gchar *title);
 
+void
+mq_window_scroll_tab_labels(MqWindow *window);
+
+void
+mq_window_begin_scrolling_tab_labels(MqWindow *window);
+
+void
+mq_window_end_scrolling_tab_labels(MqWindow *window);
+
 #endif