From 5fc6b6db398b480499bf97c0d24c2ed3caa3d8df Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 22 Aug 2016 14:50:23 +0530
Subject: [PATCH] Tapping in the top quarter of the page now shows the chrome

---
 src/pyj/read_book/iframe.pyj | 10 ++++++++--
 src/pyj/read_book/touch.pyj  | 11 +++++++----
 src/pyj/read_book/view.pyj   |  6 +++++-
 3 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/src/pyj/read_book/iframe.pyj b/src/pyj/read_book/iframe.pyj
index 3b559611b5..602eb5f73c 100644
--- a/src/pyj/read_book/iframe.pyj
+++ b/src/pyj/read_book/iframe.pyj
@@ -94,7 +94,7 @@ class IframeBoss:
             self.do_layout = flow_layout
             self.handle_wheel = flow_onwheel
             self.handle_keydown = flow_onkeydown
-            self.handle_gesture = flow_handle_gesture
+            self._handle_gesture = flow_handle_gesture
             self.to_scroll_fraction = flow_to_scroll_fraction
             self.jump_to_cfi = scroll_to_cfi
         else:
@@ -103,13 +103,19 @@ class IframeBoss:
             self.handle_keydown = paged_onkeydown
             self.to_scroll_fraction = paged_scroll_to_fraction
             self.jump_to_cfi = paged_jump_to_cfi
-            self.handle_gesture = paged_handle_gesture
+            self._handle_gesture = paged_handle_gesture
         apply_settings(data.settings)
         set_current_spine_item({'name':data.name, 'is_first':index is 0, 'is_last':index is spine.length - 1, 'initial_position':data.initial_position})
         self.last_cfi = None
         root_data, self.mathjax = finalize_resources(self.book, data.name, data.resource_data)
         unserialize_html(root_data, self.content_loaded)
 
+    def handle_gesture(self, gesture):
+        if gesture.type is 'show-chrome':
+            self.send_message('show_chrome')
+        else:
+            self._handle_gesture(gesture)
+
     def on_scroll_to_anchor(self, data):
         frag = data.frag
         if frag:
diff --git a/src/pyj/read_book/touch.pyj b/src/pyj/read_book/touch.pyj
index 1079f62249..0a6fe46f3b 100644
--- a/src/pyj/read_book/touch.pyj
+++ b/src/pyj/read_book/touch.pyj
@@ -204,10 +204,13 @@ class TouchHandler:
                         elem.dispatchEvent(fake_click)
                 return
             if not tap_on_link(gesture):
-                # TODO: Convert the tap gesture into
-                # semantic gestures based on position of tap (next page/previous
-                # page/show ui) as these are common to both paged and flow mode.
-                pass
+                if gesture.viewport_y < window.innerHeight / 4:
+                    gesture.type = 'show-chrome'
+                else:
+                    # TODO: Convert the tap gesture into
+                    # semantic gestures based on position of tap (next page/previous
+                    # page/show ui) as these are common to both paged and flow mode.
+                    pass
         get_boss().handle_gesture(gesture)
 
 touch_handler = TouchHandler()
diff --git a/src/pyj/read_book/view.pyj b/src/pyj/read_book/view.pyj
index 1eb3bec66f..1639ba2831 100644
--- a/src/pyj/read_book/view.pyj
+++ b/src/pyj/read_book/view.pyj
@@ -66,6 +66,7 @@ class View:
             'scroll_to_anchor': self.on_scroll_to_anchor,
             'update_cfi': self.on_update_cfi,
             'content_loaded': self.on_content_loaded,
+            'show_chrome': self.show_chrome,
         }
         self.currently_showing = {}
         document.getElementById('book-top-margin').addEventListener('click', self.top_margin_clicked)
@@ -77,7 +78,10 @@ class View:
     def top_margin_clicked(self, event):
         if event.button is 0:
             event.preventDefault(), event.stopPropagation()
-            self.overlay.show()
+            self.show_chrome()
+
+    def show_chrome(self):
+        self.overlay.show()
 
     def set_margins(self, no_margins):
         sd = get_session_data()