From fe630e1f5989e11dbec67580941022cbf7430c6d Mon Sep 17 00:00:00 2001
From: Victor Sergienko <singalen@gmail.com>
Date: Wed, 25 Apr 2018 23:24:54 -0700
Subject: [PATCH] iOS: double-tap for context menu

---
 src/controller_base.cpp | 22 +++++++++++++++++++++-
 src/events.cpp          |  8 ++++++--
 src/sdl/userevent.hpp   |  3 ++-
 3 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/src/controller_base.cpp b/src/controller_base.cpp
index b3c9a4e96dad..8d33eb97ca16 100644
--- a/src/controller_base.cpp
+++ b/src/controller_base.cpp
@@ -76,7 +76,10 @@ void controller_base::long_touch_callback(int x, int y)
 		int threshold = get_mouse_handler_base().drag_threshold();
 		bool yes_actually_dragging = dx * dx + dy * dy >= threshold * threshold;
 
-		if(!yes_actually_dragging && (mouse_state & SDL_BUTTON(SDL_BUTTON_LEFT)) != 0) {
+		if(!yes_actually_dragging
+		   && (mouse_state & SDL_BUTTON(SDL_BUTTON_LEFT)) != 0
+		   && sdl::point_in_rect(x_now, y_now, get_display().map_area()))
+		{
 			const theme::menu* const m = get_mouse_handler_base().gui().get_theme().context_menu();
 			if(m != nullptr) {
 				show_menu(get_display().get_theme().context_menu()->items(), x_now, y_now, true, get_display());
@@ -200,6 +203,23 @@ void controller_base::handle_event(const SDL_Event& event)
 					get_display());
 		}
 		break;
+	case DOUBLE_CLICK_EVENT:
+		{
+			int x = static_cast<int>(reinterpret_cast<std::intptr_t>(event.user.data1));
+			int y = static_cast<int>(reinterpret_cast<std::intptr_t>(event.user.data2));
+			if(event.user.code == static_cast<int>(SDL_TOUCH_MOUSEID)
+			   // TODO: Move to right_click_show_menu?
+			   && sdl::point_in_rect(x, y, get_display().map_area())
+			   // TODO: This chain repeats in several places, move to a method.
+			   && get_display().get_theme().context_menu() != nullptr) {
+				show_menu(get_display().get_theme().context_menu()->items(),
+						  x,
+						  y,
+						  true,
+						  get_display());
+			}
+		}
+		break;
 
 	case SDL_FINGERUP:
 		// handled by mouse case
diff --git a/src/events.cpp b/src/events.cpp
index 3f3474a20259..80a476db1797 100644
--- a/src/events.cpp
+++ b/src/events.cpp
@@ -617,15 +617,19 @@ void pump()
 		case SDL_MOUSEBUTTONDOWN: {
 			// Always make sure a cursor is displayed if the mouse moves or if the user clicks
 			cursor::set_focus(true);
-			if(event.button.button == SDL_BUTTON_LEFT) {
+			if(event.button.button == SDL_BUTTON_LEFT || event.button.which == SDL_TOUCH_MOUSEID) {
 				static const int DoubleClickTime = 500;
+#ifdef __IPHONEOS__
+				static const int DoubleClickMaxMove = 15;
+#else
 				static const int DoubleClickMaxMove = 3;
+#endif
 
 				if(last_mouse_down >= 0 && info.ticks() - last_mouse_down < DoubleClickTime
 						&& std::abs(event.button.x - last_click_x) < DoubleClickMaxMove
 						&& std::abs(event.button.y - last_click_y) < DoubleClickMaxMove
 				) {
-					sdl::UserEvent user_event(DOUBLE_CLICK_EVENT, event.button.x, event.button.y);
+					sdl::UserEvent user_event(DOUBLE_CLICK_EVENT, event.button.which, event.button.x, event.button.y);
 					::SDL_PushEvent(reinterpret_cast<SDL_Event*>(&user_event));
 				}
 
diff --git a/src/sdl/userevent.hpp b/src/sdl/userevent.hpp
index cac6f78605f6..10953485b310 100644
--- a/src/sdl/userevent.hpp
+++ b/src/sdl/userevent.hpp
@@ -38,8 +38,9 @@ class UserEvent
 		event_.code = code;
 	}
 
-	UserEvent(int type, int data1, int data2) : UserEvent(type)
+	UserEvent(int type, int code, int data1, int data2) : UserEvent(type)
 	{
+		event_.code = code;
 		event_.data1 = reinterpret_cast<void*>(data1);
 		event_.data2 = reinterpret_cast<void*>(data2);
 	}