From 6ed197b08f9053a06a7858f7443b314848480461 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 3 Jun 2020 13:51:22 +0530
Subject: [PATCH] Viewer: Show number of search results in title of search
 panel. Fixes #1881792 [[Enhancement - Viewer] Show number of search
 results](https://bugs.launchpad.net/calibre/+bug/1881792)

---
 src/calibre/gui2/viewer/search.py |  8 +++++++-
 src/calibre/gui2/viewer/ui.py     | 12 ++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/calibre/gui2/viewer/search.py b/src/calibre/gui2/viewer/search.py
index 8d645d26ea..c06293103c 100644
--- a/src/calibre/gui2/viewer/search.py
+++ b/src/calibre/gui2/viewer/search.py
@@ -522,6 +522,7 @@ class Results(QTreeWidget):  # {{{
 
     show_search_result = pyqtSignal(object)
     current_result_changed = pyqtSignal(object)
+    count_changed = pyqtSignal(object)
 
     def __init__(self, parent=None):
         QTreeWidget.__init__(self, parent)
@@ -578,7 +579,9 @@ class Results(QTreeWidget):  # {{{
         item.setIcon(0, self.blank_icon)
         self.item_map[len(self.search_results)] = item
         self.search_results.append(result)
-        return self.number_of_results
+        n = self.number_of_results
+        self.count_changed.emit(n)
+        return n
 
     def item_activated(self):
         i = self.currentItem()
@@ -627,6 +630,7 @@ class Results(QTreeWidget):  # {{{
         self.item_map = {}
         self.search_results = []
         self.clear()
+        self.count_changed.emit(-1)
 
     def select_first_result(self):
         if self.number_of_results:
@@ -640,6 +644,7 @@ class SearchPanel(QWidget):  # {{{
     search_requested = pyqtSignal(object)
     results_found = pyqtSignal(object)
     show_search_result = pyqtSignal(object)
+    count_changed = pyqtSignal(object)
     hide_search_panel = pyqtSignal()
 
     def __init__(self, parent=None):
@@ -655,6 +660,7 @@ class SearchPanel(QWidget):  # {{{
         si.do_search.connect(self.search_requested)
         l.addWidget(si)
         self.results = r = Results(self)
+        r.count_changed.connect(self.count_changed)
         si.cleared.connect(r.clear_all_results)
         r.show_search_result.connect(self.do_show_search_result, type=Qt.QueuedConnection)
         r.current_result_changed.connect(self.update_hidden_message)
diff --git a/src/calibre/gui2/viewer/ui.py b/src/calibre/gui2/viewer/ui.py
index 59d235f5e4..4aad74e178 100644
--- a/src/calibre/gui2/viewer/ui.py
+++ b/src/calibre/gui2/viewer/ui.py
@@ -140,6 +140,7 @@ class EbookViewer(MainWindow):
         self.search_widget = w = SearchPanel(self)
         w.search_requested.connect(self.start_search)
         w.hide_search_panel.connect(self.search_dock.close)
+        w.count_changed.connect(self.search_results_count_changed)
         self.search_dock.setWidget(w)
         self.search_dock.visibilityChanged.connect(self.search_widget.visibility_changed)
 
@@ -294,6 +295,17 @@ class EbookViewer(MainWindow):
     def show_search(self):
         self.web_view.get_current_cfi(self.show_search_with_current_selection)
 
+    def search_results_count_changed(self, num=-1):
+        if num < 0:
+            tt = _('Search')
+        elif num == 0:
+            tt = _('Search [no matches]')
+        elif num == 1:
+            tt = _('Search [one match]')
+        else:
+            tt = _('Search [{} matches]').format(num)
+        self.search_dock.setWindowTitle(tt)
+
     def show_search_with_current_selection(self, pos_data):
         self.search_dock.setVisible(True)
         self.search_dock.activateWindow()