added actions to increase/decrease font size

data/io.github.nokse22.minitext.appdata.xml.in

@@ -7,7 +7,7 @@
 	<description>
 	  <p>A very small and minimalistic text viewer with minimal editing capabilities. Best used with 'Always on Top' and/or 'Always on Visible Workspace'. It doesn't save or load files, just your clipboard. It is meant to be used as a place where to edit text to be pasted.</p>
 	</description>
-  <summary>Ephemeral text</summary>
+  <summary>Ephemeral text edits</summary>
 
 	<content_rating type="oars-1.0">
   </content_rating>

data/io.github.nokse22.minitext.gschema.xml

@@ -6,6 +6,9 @@
   </key>
   <key name="window-height" type="i">
     <default>400</default>
+  </key>
+	<key name="font-size" type="i">
+    <default>12</default>
   </key>
 	</schema>
 </schemalist>

src/main.py

@@ -50,17 +50,32 @@ def __init__(self):
         self.create_action('quit', lambda *_: self.quit(), ['<primary>q'])
         self.create_action('about', self.on_about_action)
         self.create_action('preferences', self.on_preferences_action)
+        self.create_action('increase-font', self.on_increase_font_action, ['<control>plus'])
+        self.create_action('decrease-font', self.on_decrease_font_action, ['<control>minus'])
+
+    def on_increase_font_action(self, widget, _):
+        size = self.win.settings.get_int('font-size')
+        self.win.settings.set_int('font-size', size + 1)
+        self.win.change_font()
+        print(size + 1)
+
+    def on_decrease_font_action(self, widget, _):
+        size = self.win.settings.get_int('font-size')
+        if size > 10:
+            self.win.settings.set_int('font-size', size - 1)
+            self.win.change_font()
+            print(size - 1)
 
     def do_activate(self):
         """Called when the application is activated.
 
         We raise the application's main window, creating it if
         necessary.
         """
-        win = self.props.active_window
-        if not win:
-            win = MiniTextWindow(application=self)
-        win.present()
+        self.win = self.props.active_window
+        if not self.win:
+            self.win = MiniTextWindow(application=self)
+        self.win.present()
 
     def on_about_action(self, widget, _):
         """Callback for the app.about action."""

src/window.py

@@ -38,6 +38,22 @@ def __init__(self, **kwargs):
             "window-height", self, "default-height", Gio.SettingsBindFlags.DEFAULT
         )
 
+        self.change_font()
+
+    def change_font(self):
+        css_data = f"""
+            textview {{
+                font-size: {self.settings.get_int('font-size')}pt;
+            }}
+        """
+
+        style_provider = Gtk.CssProvider()
+        style_provider.load_from_data(css_data, -1)
+
+        # Apply the theme to the GTK app
+        context = self.text_view.get_style_context()
+        context.add_provider(style_provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
+
     @Gtk.Template.Callback("on_copy_action")
     def on_copy_action(self, *args):
         print("copy")

src/window.ui

@@ -3,8 +3,6 @@
   <requires lib="gtk" version="4.0"/>
   <requires lib="Adw" version="1.0"/>
   <template class="MiniTextWindow" parent="AdwApplicationWindow">
-    <property name="default-width">600</property>
-    <property name="default-height">300</property>
     <property name="modal">true</property>
     <property name="title"></property>
     <child>