Improve search/replace handling of is_multiple fields

src/calibre/gui2/dialogs/metadata_bulk.py

@@ -417,6 +417,8 @@ def prepare_search_and_replace(self):
         self.multiple_separator.setFixedWidth(30)
         self.multiple_separator.setText(' ::: ')
         self.multiple_separator.textChanged.connect(self.s_r_separator_changed)
+        self.results_count.valueChanged[int].connect(self.s_r_display_bounds_changed)
+        self.starting_from.valueChanged[int].connect(self.s_r_display_bounds_changed)
 
     def s_r_get_field(self, mi, field):
         if field:
@@ -439,6 +441,9 @@ def s_r_get_field(self, mi, field):
             val = []
         return val
 
+    def s_r_display_bounds_changed(self, i):
+        self.s_r_search_field_changed(self.search_field.currentIndex())
+
     def s_r_template_changed(self):
         self.s_r_search_field_changed(self.search_field.currentIndex())
 
@@ -454,6 +459,9 @@ def s_r_search_field_changed(self, idx):
             mi = self.db.get_metadata(self.ids[i], index_is_id=True)
             src = unicode(self.search_field.currentText())
             t = self.s_r_get_field(mi, src)
+            if len(t) > 1:
+                t = t[self.starting_from.value()-1:
+                      self.starting_from.value()-1 + self.results_count.value()]
             w.setText(unicode(self.multiple_separator.text()).join(t))
 
         if self.search_mode.currentIndex() == 0:
@@ -466,12 +474,8 @@ def s_r_destination_field_changed(self, txt):
         txt = unicode(txt)
         if not txt:
             txt = unicode(self.search_field.currentText())
-        self.comma_separated.setEnabled(True)
         if txt and txt in self.writable_fields:
             self.destination_field_fm = self.db.metadata_for_field(txt)
-            if self.destination_field_fm['is_multiple']:
-                self.comma_separated.setEnabled(False)
-                self.comma_separated.setChecked(True)
         self.s_r_paint_results(None)
 
     def s_r_search_mode_changed(self, val):
@@ -542,6 +546,22 @@ def s_r_do_destination(self, mi, val):
             dest = src
         dest_mode = self.replace_mode.currentIndex()
 
+        if self.destination_field_fm['is_multiple']:
+            if self.comma_separated.isChecked():
+                if dest == 'authors':
+                    splitter = ' & '
+                else:
+                    splitter = ','
+
+                res = []
+                for v in val:
+                    for x in v.split(splitter):
+                        if x.strip():
+                            res.append(x.strip())
+                val = res
+            else:
+                val = [v.replace(',', '') for v in val]
+
         if dest_mode != 0:
             dest_val = mi.get(dest, '')
             if dest_val is None:
@@ -602,8 +622,9 @@ def s_r_paint_results(self, txt):
             try:
                 result = self.s_r_do_regexp(mi)
                 t = self.s_r_do_destination(mi, result)
-                if len(result) > 1 and self.destination_field_fm is not None and \
-                            self.destination_field_fm['is_multiple']:
+                if len(t) > 1 and self.destination_field_fm['is_multiple']:
+                    t = t[self.starting_from.value()-1:
+                          self.starting_from.value()-1 + self.results_count.value()]
                     t = unicode(self.multiple_separator.text()).join(t)
                 else:
                     t = self.s_r_replace_mode_separator().join(t)

src/calibre/gui2/dialogs/metadata_bulk.ui

@@ -658,11 +658,12 @@ If blank, the source field is used if the field is modifiable</string>
            <item>
             <widget class="QCheckBox" name="comma_separated">
              <property name="toolTip">
-              <string>Specifies whether a comma should be put between values when copying from a
-multiple-valued field to a single-valued field</string>
+              <string>Specifies whether result items should be split into multiple values or
+left as single values. This option has the most effect when the source field is
+not multiple and the destination field is multiple</string>
              </property>
              <property name="text">
-              <string>&amp;Use comma</string>
+              <string>Split &amp;result</string>
              </property>
              <property name="checked">
               <bool>true</bool>
@@ -684,28 +685,8 @@ multiple-valued field to a single-valued field</string>
            </item>
           </layout>
          </item>
-         <item row="8" column="1">
-          <widget class="QLabel" name="xlabel_3">
-           <property name="text">
-            <string>Test text</string>
-           </property>
-           <property name="buddy">
-            <cstring>test_text</cstring>
-           </property>
-          </widget>
-         </item>
-         <item row="8" column="2">
+         <item row="8" column="1" colspan="2">
           <layout class="QHBoxLayout" name="horizontalLayout_21">
-           <item>
-            <widget class="QLabel" name="label_51">
-             <property name="text">
-              <string>Test result</string>
-             </property>
-             <property name="buddy">
-              <cstring>test_result</cstring>
-             </property>
-            </widget>
-           </item>
            <item>
             <spacer name="HSpacer_347">
              <property name="orientation">
@@ -719,10 +700,62 @@ multiple-valued field to a single-valued field</string>
              </property>
             </spacer>
            </item>
+           <item>
+            <widget class="QLabel" name="xlabel_412">
+             <property name="text">
+              <string>For multiple-valued fields, sho&amp;w</string>
+             </property>
+             <property name="buddy">
+              <cstring>results_count</cstring>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QSpinBox" name="results_count">
+             <property name="enabled">
+              <bool>true</bool>
+             </property>
+             <property name="minimum">
+              <number>1</number>
+             </property>
+             <property name="maximum">
+              <number>999</number>
+             </property>
+             <property name="value">
+              <number>999</number>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QLabel" name="xlabel_412">
+             <property name="text">
+              <string>values starting a&amp;t</string>
+             </property>
+             <property name="buddy">
+              <cstring>starting_from</cstring>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QSpinBox" name="starting_from">
+             <property name="enabled">
+              <bool>true</bool>
+             </property>
+             <property name="minimum">
+              <number>1</number>
+             </property>
+             <property name="maximum">
+              <number>999</number>
+             </property>
+             <property name="value">
+              <number>1</number>
+             </property>
+            </widget>
+           </item>
            <item>
             <widget class="QLabel" name="xlabel_41">
              <property name="text">
-              <string>Multi&amp;ple separator:</string>
+              <string>with values separated b&amp;y</string>
              </property>
              <property name="buddy">
               <cstring>multiple_separator</cstring>
@@ -756,6 +789,20 @@ multiple-valued field to a single-valued field</string>
              </rect>
             </property>
             <layout class="QGridLayout" name="testgrid">
+             <item row="7" column="1">
+              <widget class="QLabel" name="xlabel_3">
+               <property name="text">
+                <string>Test text</string>
+               </property>
+              </widget>
+             </item>
+             <item row="7" column="2">
+              <widget class="QLabel" name="xlabel_3">
+               <property name="text">
+                <string>Test result</string>
+               </property>
+              </widget>
+             </item>
              <item row="8" column="0">
               <widget class="QLabel" name="label_31">
                <property name="text">
@@ -857,6 +904,8 @@ multiple-valued field to a single-valued field</string>
   <tabstop>destination_field</tabstop>
   <tabstop>replace_mode</tabstop>
   <tabstop>comma_separated</tabstop>
+  <tabstop>results_count</tabstop>
+  <tabstop>starting_from</tabstop>
   <tabstop>multiple_separator</tabstop>
   <tabstop>test_text</tabstop>
   <tabstop>test_result</tabstop>