From ef2544868daf241ccfe098cf2ee6845204080ffb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C5=99emysl=20Eric=20Janouch?= <p@janouch.name>
Date: Mon, 14 Feb 2022 02:05:14 +0100
Subject: Open items on mouse button release, not press

At least the left and middle mouse buttons seem to behave similarly
in other programs and systems.

Context menus are opened on button release on Windows and with some
GTK+ widgets (popovers in GtkPlacesSidebar).
---
 fiv-browser.c | 56 +++++++++++++++++++++++++++++++-------------------------
 1 file changed, 31 insertions(+), 25 deletions(-)

diff --git a/fiv-browser.c b/fiv-browser.c
index aaf955f..563898f 100644
--- a/fiv-browser.c
+++ b/fiv-browser.c
@@ -1001,8 +1001,9 @@ fiv_browser_realize(GtkWidget *widget)
 		.wclass = GDK_INPUT_OUTPUT,
 
 		.visual = gtk_widget_get_visual(widget),
-		.event_mask = gtk_widget_get_events(widget) | GDK_KEY_PRESS_MASK |
-			GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK | GDK_SCROLL_MASK,
+		.event_mask = gtk_widget_get_events(widget) | GDK_POINTER_MOTION_MASK |
+			GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_SCROLL_MASK |
+			GDK_KEY_PRESS_MASK,
 	};
 
 	// We need this window to receive input events at all.
@@ -1099,15 +1100,10 @@ fiv_browser_button_press_event(GtkWidget *widget, GdkEventButton *event)
 
 	const Entry *entry = entry_at(self, event->x, event->y);
 	if (!entry && state == 0) {
-		switch (event->button) {
-		case GDK_BUTTON_PRIMARY:
-			break;
-		case GDK_BUTTON_SECONDARY:
+		if (event->button == GDK_BUTTON_SECONDARY)
 			show_context_menu(widget, fiv_io_model_get_location(self->model));
-			break;
-		default:
+		else if (event->button != GDK_BUTTON_PRIMARY)
 			return FALSE;
-		}
 
 		if (self->selected) {
 			self->selected = NULL;
@@ -1115,21 +1111,11 @@ fiv_browser_button_press_event(GtkWidget *widget, GdkEventButton *event)
 		}
 		return TRUE;
 	}
-	if (!entry)
-		return FALSE;
 
-	switch (event->button) {
-	case GDK_BUTTON_PRIMARY:
-		if (state == 0)
-			return open_entry(widget, entry, FALSE);
-		if (state == GDK_CONTROL_MASK)
-			return open_entry(widget, entry, TRUE);
-		return FALSE;
-	case GDK_BUTTON_MIDDLE:
-		if (state == 0)
-			return open_entry(widget, entry, TRUE);
-		return FALSE;
-	case GDK_BUTTON_SECONDARY:
+	// In accordance with Nautilus, Thunar, and the mildly confusing
+	// Apple Human Interface Guidelines, but not with the ugly Windows User
+	// Experience Interaction Guidelines, open the context menu on button press.
+	if (entry && event->button == GDK_BUTTON_SECONDARY) {
 		self->selected = entry;
 		gtk_widget_queue_draw(widget);
 
@@ -1141,9 +1127,28 @@ fiv_browser_button_press_event(GtkWidget *widget, GdkEventButton *event)
 		show_context_menu(widget, file);
 		g_object_unref(file);
 		return TRUE;
-	default:
-		return FALSE;
 	}
+	return FALSE;
+}
+
+static gboolean
+fiv_browser_button_release_event(GtkWidget *widget, GdkEventButton *event)
+{
+	GTK_WIDGET_CLASS(fiv_browser_parent_class)
+		->button_release_event(widget, event);
+
+	FivBrowser *self = FIV_BROWSER(widget);
+	const Entry *entry = entry_at(self, event->x, event->y);
+	if (!entry)
+		return FALSE;
+
+	guint state = event->state & gtk_accelerator_get_default_mod_mask();
+	if ((event->button == GDK_BUTTON_PRIMARY && state == 0))
+		return open_entry(widget, entry, FALSE);
+	if ((event->button == GDK_BUTTON_PRIMARY && state == GDK_CONTROL_MASK) ||
+		(event->button == GDK_BUTTON_MIDDLE && state == 0))
+		return open_entry(widget, entry, TRUE);
+	return FALSE;
 }
 
 static gboolean
@@ -1516,6 +1521,7 @@ fiv_browser_class_init(FivBrowserClass *klass)
 	widget_class->draw = fiv_browser_draw;
 	widget_class->size_allocate = fiv_browser_size_allocate;
 	widget_class->button_press_event = fiv_browser_button_press_event;
+	widget_class->button_release_event = fiv_browser_button_release_event;
 	widget_class->motion_notify_event = fiv_browser_motion_notify_event;
 	widget_class->scroll_event = fiv_browser_scroll_event;
 	widget_class->key_press_event = fiv_browser_key_press_event;
-- 
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