From 7fe23d9e58d3e2ab67f19f043b45ece4484cc180 Mon Sep 17 00:00:00 2001
From: Charles Haley <cbhaley@i.wont.say.com>
Date: Sun, 21 Mar 2021 15:29:32 +0000
Subject: [PATCH] Enhancement #1920574: allow changing fonts in the templat
 tester

---
 src/calibre/gui2/dialogs/template_dialog.py |  27 ++-
 src/calibre/gui2/dialogs/template_dialog.ui | 244 ++++++++++----------
 2 files changed, 151 insertions(+), 120 deletions(-)

diff --git a/src/calibre/gui2/dialogs/template_dialog.py b/src/calibre/gui2/dialogs/template_dialog.py
index 0bd30367b2..5b5cfddd57 100644
--- a/src/calibre/gui2/dialogs/template_dialog.py
+++ b/src/calibre/gui2/dialogs/template_dialog.py
@@ -9,7 +9,8 @@ import json, os, traceback
 
 from qt.core import (Qt, QDialog, QDialogButtonBox, QSyntaxHighlighter, QFont,
                       QRegExp, QApplication, QTextCharFormat, QColor, QCursor,
-                      QIcon, QSize, QPalette, QLineEdit, QByteArray)
+                      QIcon, QSize, QPalette, QLineEdit, QByteArray,
+                      QFontInfo, QFontDatabase)
 
 from calibre import sanitize_file_name
 from calibre.constants import config_dir
@@ -81,8 +82,9 @@ class TemplateHighlighter(QSyntaxHighlighter):
         self.highlighted_paren = False
 
     def initializeFormats(self):
+        font = gprefs.get('gpm_template_editor_font', 'monospace')
         Config = self.Config
-        Config["fontfamily"] = "monospace"
+        Config["fontfamily"] = font
         pal = QApplication.instance().palette()
         for name, color, bold, italic in (
                 ("normal", None, False, False),
@@ -408,8 +410,7 @@ class TemplateDialog(QDialog, Ui_TemplateDialog):
             '<a href="%s">%s</a>' % (
                 localize_user_manual_link('https://manual.calibre-ebook.com/generated/en/template_ref.html'), tt))
 
-        self.font_size_box.setValue(gprefs['gpm_template_editor_font_size'])
-        self.font_size_box.valueChanged.connect(self.font_size_changed)
+        self.set_up_font_boxes()
         self.textbox.setFocus()
         # Now geometry
         try:
@@ -419,6 +420,24 @@ class TemplateDialog(QDialog, Ui_TemplateDialog):
         except Exception:
             pass
 
+    def set_up_font_boxes(self):
+        family = gprefs.get('gpm_template_editor_font', 'monospace')
+        size = gprefs['gpm_template_editor_font_size']
+        font = QFont(family, pointSize=size)
+        self.font_box.setWritingSystem(QFontDatabase.Latin)
+        self.font_box.setCurrentFont(font)
+        self.font_box.setEditable(False)
+        self.font_box.currentFontChanged.connect(self.font_changed)
+        self.font_size_box.setValue(gprefs['gpm_template_editor_font_size'])
+        self.font_size_box.valueChanged.connect(self.font_size_changed)
+
+    def font_changed(self, font):
+        fi = QFontInfo(font)
+        gprefs['gpm_template_editor_font_size'] = fi.pointSize()
+        gprefs['gpm_template_editor_font'] = unicode_type(fi.family())
+        self.highlighter.initializeFormats()
+        self.highlighter.rehighlight()
+
     def font_size_changed(self, toWhat):
         gprefs['gpm_template_editor_font_size'] = toWhat
         self.highlighter.initializeFormats()
diff --git a/src/calibre/gui2/dialogs/template_dialog.ui b/src/calibre/gui2/dialogs/template_dialog.ui
index 06a116dd5d..709bf30039 100644
--- a/src/calibre/gui2/dialogs/template_dialog.ui
+++ b/src/calibre/gui2/dialogs/template_dialog.ui
@@ -380,43 +380,54 @@
           <layout class="BoxLayout" name="user_layout_9" dir="TopToBottom">
           </layout>
          </item>
-         <item row="20" column="0">
-          <widget class="QLabel" name="label">
-           <property name="text">
-            <string>Font size:</string>
-           </property>
-          </widget>
-         </item>
-         <item row="20" column="1" colspan="3">
-          <layout class="QGridLayout" name="gridLayout">
-           <item row="1" column="0">
-            <widget class="QSpinBox" name="font_size_box"/>
+         <item row="20" column="0" colspan="2">
+          <layout class="QHBoxLayout">
+           <item>
+            <widget class="QLabel" name="font_name_label">
+             <property name="text">
+              <string>Current font:</string>
+             </property>
+             <property name="buddy">
+              <cstring>font_box</cstring>
+             </property>
+            </widget>
            </item>
-           <item row="1" column="1">
-            <spacer>
-             <property name="orientation">
-              <enum>Qt::Horizontal</enum>
+           <item>
+            <widget class="QFontComboBox" name="font_box">
+             <property name="toolTip">
+              <string>Select the font for the Template box</string>
              </property>
-             <property name="sizeHint" stdset="0">
-              <size>
-               <width>0</width>
-               <height>0</height>
-              </size>
-             </property>
-            </spacer>
+            </widget>
            </item>
-           <item row="1" column="2">
-            <widget class="QDialogButtonBox" name="buttonBox">
-             <property name="orientation">
-              <enum>Qt::Horizontal</enum>
+           <item>
+            <widget class="QLabel" name="font_size_label">
+             <property name="text">
+              <string>Size:</string>
              </property>
-             <property name="standardButtons">
-              <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+             <property name="buddy">
+              <cstring>font_size_box</cstring>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QSpinBox" name="font_size_box">
+             <property name="toolTip">
+              <string>Select the font size for the Template box</string>
              </property>
             </widget>
            </item>
           </layout>
          </item>
+         <item row="20" column="3">
+          <widget class="QDialogButtonBox" name="buttonBox">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="standardButtons">
+            <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+           </property>
+          </widget>
+         </item>
          <item row="21" column="0" colspan="4">
           <widget class="QFrame">
            <property name="frameShape">
@@ -424,94 +435,95 @@
            </property>
           </widget>
          </item>
-         <item row="22" column="0" colspan="2">
-          <widget class="QLabel" name="label">
-           <property name="text">
-            <string>Template Function Reference</string>
-           </property>
-           <property name="buddy">
-            <cstring>function</cstring>
-           </property>
-          </widget>
-         </item>
-         <item row="23" column="0">
-          <widget class="QLabel" name="label">
-           <property name="text">
-            <string>Function &amp;name:</string>
-           </property>
-           <property name="buddy">
-            <cstring>function</cstring>
-           </property>
-          </widget>
-         </item>
-         <item row="23" column="1" colspan="3">
-          <widget class="QComboBox" name="function"/>
-         </item>
-         <item row="24" column="0">
-          <widget class="QLabel" name="label_22">
-           <property name="text">
-            <string>&amp;Function type:</string>
-           </property>
-           <property name="alignment">
-            <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
-           </property>
-           <property name="buddy">
-            <cstring>func_type</cstring>
-           </property>
-          </widget>
-         </item>
-         <item row="24" column="1" colspan="3">
-          <widget class="QLineEdit" name="func_type">
-           <property name="readOnly">
-            <bool>true</bool>
-           </property>
-          </widget>
-         </item>
-         <item row="25" column="0">
-          <widget class="QLabel" name="label_2">
-           <property name="text">
-            <string>&amp;Documentation:</string>
-           </property>
-           <property name="alignment">
-            <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
-           </property>
-           <property name="buddy">
-            <cstring>documentation</cstring>
-           </property>
-          </widget>
-         </item>
-         <item row="26" column="0">
-          <widget class="QLabel" name="label_3">
-           <property name="text">
-            <string>&amp;Code:</string>
-           </property>
-           <property name="alignment">
-            <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
-           </property>
-           <property name="buddy">
-            <cstring>source_code</cstring>
-           </property>
-          </widget>
-         </item>
-         <item row="25" column="1" colspan="3">
-          <widget class="QPlainTextEdit" name="documentation">
-           <property name="maximumSize">
-            <size>
-             <width>16777215</width>
-             <height>75</height>
-            </size>
-           </property>
-          </widget>
-         </item>
-         <item row="26" column="1" colspan="3">
-          <widget class="QPlainTextEdit" name="source_code">
-           <property name="maximumSize">
-            <size>
-             <width>16777215</width>
-             <height>75</height>
-            </size>
-           </property>
-          </widget>
+         <item row="22" column="0" colspan="4">
+          <layout class="QGridLayout">
+           <item row="0" column="0" colspan="2">
+            <widget class="QLabel" name="label">
+             <property name="text">
+              <string>Template Function Reference</string>
+             </property>
+            </widget>
+           </item>
+           <item row="1" column="0">
+            <widget class="QLabel" name="label">
+             <property name="text">
+              <string>Function &amp;name:</string>
+             </property>
+             <property name="buddy">
+              <cstring>function</cstring>
+             </property>
+            </widget>
+           </item>
+           <item row="1" column="1">
+            <widget class="QComboBox" name="function"/>
+           </item>
+           <item row="2" column="0">
+            <widget class="QLabel" name="label_22">
+             <property name="text">
+              <string>&amp;Function type:</string>
+             </property>
+             <property name="alignment">
+              <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
+             </property>
+             <property name="buddy">
+              <cstring>func_type</cstring>
+             </property>
+            </widget>
+           </item>
+           <item row="2" column="1">
+            <widget class="QLineEdit" name="func_type">
+             <property name="readOnly">
+              <bool>true</bool>
+             </property>
+            </widget>
+           </item>
+           <item row="3" column="0">
+            <widget class="QLabel" name="label_2">
+             <property name="text">
+              <string>&amp;Documentation:</string>
+             </property>
+             <property name="alignment">
+              <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
+             </property>
+             <property name="buddy">
+              <cstring>documentation</cstring>
+             </property>
+            </widget>
+           </item>
+           <item row="3" column="1">
+            <widget class="QPlainTextEdit" name="documentation">
+             <property name="maximumSize">
+              <size>
+               <width>16777215</width>
+               <height>75</height>
+              </size>
+             </property>
+            </widget>
+           </item>
+           <item row="4" column="0">
+            <widget class="QLabel" name="label_3">
+             <property name="text">
+              <string>&amp;Code:</string>
+             </property>
+             <property name="alignment">
+              <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
+             </property>
+             <property name="buddy">
+              <cstring>source_code</cstring>
+             </property>
+            </widget>
+           </item>
+           <item row="4" column="1">
+            <widget class="QPlainTextEdit" name="source_code">
+             <property name="maximumSize">
+              <size>
+               <width>16777215</width>
+               <height>75</height>
+              </size>
+             </property>
+            </widget>
+           </item>
+          </layout>
          </item>
          <item row="27" column="1">
           <widget class="QLabel" name="template_tutorial">