From ba99cb7971032445c3b7a85dfb6c927f533b7574 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 26 May 2020 13:26:21 +0530
Subject: [PATCH] Show shortcut for add highlight button in tooltip

---
 src/calibre/gui2/viewer/highlights.py | 17 +++++++++++++++--
 src/calibre/gui2/viewer/ui.py         |  1 +
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/calibre/gui2/viewer/highlights.py b/src/calibre/gui2/viewer/highlights.py
index 56264aa63d..930bc997ce 100644
--- a/src/calibre/gui2/viewer/highlights.py
+++ b/src/calibre/gui2/viewer/highlights.py
@@ -7,13 +7,14 @@ from __future__ import absolute_import, division, print_function, unicode_litera
 from itertools import chain
 
 from PyQt5.Qt import (
-    QHBoxLayout, QIcon, QItemSelectionModel, QLabel, QListWidget, QListWidgetItem,
-    QPushButton, Qt, QTextBrowser, QVBoxLayout, QWidget, pyqtSignal
+    QHBoxLayout, QIcon, QItemSelectionModel, QKeySequence, QLabel, QListWidget,
+    QListWidgetItem, QPushButton, Qt, QTextBrowser, QVBoxLayout, QWidget, pyqtSignal
 )
 
 from calibre.constants import plugins
 from calibre.gui2 import error_dialog, question_dialog
 from calibre.gui2.viewer.search import SearchInput
+from calibre.gui2.viewer.shortcuts import index_to_key_sequence
 from polyglot.builtins import range
 
 
@@ -128,6 +129,18 @@ class HighlightsPanel(QWidget):
         l.addWidget(nd)
         nd.setVisible(False)
 
+    def set_tooltips(self, rmap):
+        a = rmap.get('create_annotation')
+        if a:
+
+            def as_text(idx):
+                return index_to_key_sequence(idx).toString(QKeySequence.NativeText)
+
+            tt = self.add_button.toolTip().partition('[')[0].strip()
+            keys = sorted(filter(None, map(as_text, a)))
+            if keys:
+                self.add_button.setToolTip('{} [{}]'.format(tt, ', '.join(keys)))
+
     def search_requested(self, query):
         if not self.highlights.find_query(query):
             error_dialog(self, _('No matches'), _(
diff --git a/src/calibre/gui2/viewer/ui.py b/src/calibre/gui2/viewer/ui.py
index d9e2443716..59d235f5e4 100644
--- a/src/calibre/gui2/viewer/ui.py
+++ b/src/calibre/gui2/viewer/ui.py
@@ -203,6 +203,7 @@ class EbookViewer(MainWindow):
         for k, v in iteritems(smap):
             rmap[v].append(k)
         self.actions_toolbar.set_tooltips(rmap)
+        self.highlights_widget.set_tooltips(rmap)
 
     def resizeEvent(self, ev):
         self.loading_overlay.resize(self.size())