Add some basic operations to the selection bar

src/pyj/read_book/iframe.pyj

@@ -146,6 +146,7 @@ class IframeBoss:
             'annotations': self.annotations_msg_received,
             'copy_selection': self.copy_selection,
             'replace_highlights': self.replace_highlights,
+            'clear_selection': def(): window.getSelection().removeAllRanges();,
         }
         self.comm = IframeClient(handlers)
         self.last_window_ypos = 0

src/pyj/read_book/prefs/main.pyj

@@ -94,7 +94,7 @@ class Prefs:
         ci(_('Keyboard shortcuts'), 'keyboard', _('Customize the keyboard shortcuts'))
         if runtime.is_standalone_viewer:
             ci(_('Fonts'), 'fonts', _('Font choices'))
-            ci(_('Miscellaneous'), 'misc', _('Window size, last read position, etc.'))
+            ci(_('Miscellaneous'), 'misc', _('Window size, last read position, toolbar, etc.'))
         build_list(c, items)
 
     def display_fonts(self, container):

src/pyj/read_book/selection_bar.pyj

@@ -3,8 +3,11 @@
 from __python__ import bound_methods, hash_literals
 
 from elementmaker import E
+from gettext import gettext as _
 
 from book_list.theme import get_color
+from dom import svgicon
+from read_book.globals import ui_operations
 
 
 class SelectionBar:
@@ -13,11 +16,25 @@ class SelectionBar:
         self.view = view
         c = self.container
         bar = E.div(
-            style='position: absolute; left: 0; top: 0; height: 3ex; border: solid 1px currentColor; border-radius: 5px; overflow: hidden;'
-            'pointer-events: auto; min-width: 50px; padding: 5px; background-color: {}'.format(get_color("window-background"))
+            style='position: absolute; height: 4ex; border: solid 1px currentColor; border-radius: 5px; overflow: hidden;'
+            'display: flex; align-items: center; pointer-events: auto; padding: 5px; left: 0; top: 0;'
+            'background-color: {}'.format(get_color("window-background"))
         )
         c.appendChild(bar)
 
+        def cb(icon, tooltip, callback):
+            ans = svgicon(icon, '3ex', '3ex', tooltip)
+            ans.addEventListener('click', callback)
+            ans.classList.add('simple-link')
+            ans.style.marginLeft = ans.style.marginRight = '0.5rem'
+            return ans
+
+        if ui_operations.copy_selection:
+            bar.appendChild(cb('copy', _('Copy to clipboard'), self.copy_to_clipboard))
+        if ui_operations.toggle_lookup:
+            bar.appendChild(cb('library', _('Lookup/search selected word'), self.lookup))
+        bar.appendChild(cb('close', _('Clear the selection'), self.clear_selection))
+
     @property
     def container(self):
         return document.getElementById('book-selection-bar-overlay')
@@ -36,6 +53,16 @@ class SelectionBar:
     def is_visible(self):
         return self.container.style.display is not 'none'
 
+    def copy_to_clipboard(self):
+        if self.view.currently_showing.selected_text and ui_operations.copy_selection:
+            ui_operations.copy_selection(self.view.currently_showing.selected_text)
+
+    def lookup(self):
+        ui_operations.toggle_lookup(True)
+
+    def clear_selection(self):
+        self.view.on_handle_shortcut({'name': 'clear_selection'})
+
     def update_position(self):
         cs = self.view.currently_showing
         if not cs.has_selection:

src/pyj/read_book/view.pyj

@@ -490,6 +490,8 @@ class View:
         elif data.name is 'previous':
             self.iframe_wrapper.send_message(
                 'next_screen', backwards=True, all_pages_on_screen=get_session_data().get('paged_margin_clicks_scroll_by_screen'))
+        elif data.name is 'clear_selection':
+            self.iframe_wrapper.send_message('clear_selection')
         elif data.name is 'print':
             ui_operations.print_book()
         elif data.name is 'preferences':

src/pyj/viewer-main.pyj

@@ -346,8 +346,8 @@ if window is window.top:
         to_python.reset_interface()
     ui_operations.quit = def():
         to_python.quit()
-    ui_operations.toggle_lookup = def():
-        to_python.toggle_lookup()
+    ui_operations.toggle_lookup = def(force_show):
+        to_python.toggle_lookup(v'!!force_show')
     ui_operations.selection_changed = def(selected_text):
         to_python.selection_changed(selected_text)
     ui_operations.update_current_toc_nodes = def(current_node_id, top_level_node_id):