Add keyboard shortcut and setting to increase text size (fixes #978)add-kbd-shortcut-to-zoom-text

	* Can zoom in / out or reset zoom levels via shortcuts
	* Can change zoom value via global preferences window

4 files changed, 65 insertions, 5 deletions

diff --git a/main/data/gtk/help-overlay.ui b/main/data/gtk/help-overlay.ui
index 17b0555c..bb3bb437 100644
--- a/main/data/gtk/help-overlay.ui
+++ b/main/data/gtk/help-overlay.ui
@@ -26,6 +26,24 @@
                                 <property name="title" translatable="yes">Keyboard shortcuts</property>
                             </object>
                         </child>
+                        <child>
+                            <object class="GtkShortcutsShortcut">
+                                <property name="accelerator">&lt;ctrl&gt;plus</property>
+                                <property name="title" translatable="yes">Increase text size</property>
+                            </object>
+                        </child>
+                        <child>
+                            <object class="GtkShortcutsShortcut">
+                                <property name="accelerator">&lt;ctrl&gt;minus</property>
+                                <property name="title" translatable="yes">Lower text size</property>
+                            </object>
+                        </child>
+                        <child>
+                            <object class="GtkShortcutsShortcut">
+                                <property name="accelerator">&lt;ctrl&gt;0</property>
+                                <property name="title" translatable="yes">Resets text size to default</property>
+                            </object>
+                        </child>
                     </object>
                 </child>
                 <child>
diff --git a/main/data/settings_dialog.ui b/main/data/settings_dialog.ui
index a8b24135..ac7397a0 100644
--- a/main/data/settings_dialog.ui
+++ b/main/data/settings_dialog.ui
@@ -2,7 +2,7 @@
 <interface>
     <template class="DinoUiSettingsDialog" parent="AdwPreferencesWindow">
         <property name="default-width">500</property>
-        <property name="default-height">360</property>
+        <property name="default-height">420</property>
         <property name="modal">True</property>
         <property name="search-enabled">False</property>
         <child>
@@ -11,6 +11,17 @@
                     <object class="AdwPreferencesGroup">
                         <child>
                             <object class="AdwActionRow">
+                                <property name="title" translatable="yes">Set _Zoom Level</property>
+                                <property name="use-underline">True</property>
+                                <child type="suffix">
+                                    <object class="GtkSpinButton" id="zoom_spinbutton">
+                                        <property name="valign">center</property>
+                                    </object>
+                                </child>
+                            </object>
+                        </child>
+                        <child>
+                            <object class="AdwActionRow">
                                 <property name="title" translatable="yes">Send _Typing Notifications</property>
                                 <property name="use-underline">True</property>
                                 <property name="activatable-widget">typing_switch</property>
diff --git a/main/src/ui/application.vala b/main/src/ui/application.vala
index 2e785224..1a2c93ff 100644
--- a/main/src/ui/application.vala
+++ b/main/src/ui/application.vala
@@ -10,6 +10,9 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
     private const string[] KEY_COMBINATION_ADD_CONFERENCE = {"<Ctrl>G", null};
     private const string[] KEY_COMBINATION_LOOP_CONVERSATIONS = {"<Ctrl>Tab", null};
     private const string[] KEY_COMBINATION_LOOP_CONVERSATIONS_REV = {"<Ctrl><Shift>Tab", null};
+    private const string[] KEY_COMBINATION_ZOOM_IN = {"<Ctrl>KP_Add", "<Ctrl>plus", null};
+    private const string[] KEY_COMBINATION_ZOOM_OUT = {"<Ctrl>KP_Subtract","<Ctrl>minus", null};
+    private const string[] KEY_COMBINATION_ZOOM_RESET = {"<Ctrl>0", "<Ctrl>KP_0", null};
 
     private MainWindow window;
     public MainWindowController controller;
@@ -32,10 +35,8 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
         init();
         Environment.set_application_name("Dino");
         Window.set_default_icon_name("im.dino.Dino");
-
         create_actions();
         add_main_option_entries(options);
-
         startup.connect(() => {
             if (print_version) {
                 print(@"Dino $(Dino.get_version())\n");
@@ -79,6 +80,7 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
                 if ((get_flags() & ApplicationFlags.IS_SERVICE) == ApplicationFlags.IS_SERVICE) window.hide_on_close = true;
             }
             window.present();
+            Util.force_css(window, "* { font-size: " + settings.zoom_level.to_string() + "% ;} " ); 
         });
     }
 
@@ -111,7 +113,12 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
                 break;
         }
     }
-
+    
+    private void set_zoom(int step){
+       if (step == 0) settings.zoom_level = 100; else settings.zoom_level += step;
+       Util.force_css(window, "* { font-size: " + settings.zoom_level.to_string() + "% ;} " ); 
+    }
+    
     private void create_actions() {
         SimpleAction accounts_action = new SimpleAction("accounts", null);
         accounts_action.activate.connect(show_accounts_window);
@@ -146,6 +153,23 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
         });
         add_action(deny_subscription_action);
 
+        
+        SimpleAction zoom_in_action = new SimpleAction("zoom_in", null);
+        zoom_in_action.activate.connect(() => { set_zoom(+5); } );
+        add_action(zoom_in_action);
+        set_accels_for_action("app.zoom_in", KEY_COMBINATION_ZOOM_IN);
+        
+        SimpleAction zoom_out_action = new SimpleAction("zoom_out", null);
+        zoom_out_action.activate.connect(() => { set_zoom(-5); } );
+        add_action(zoom_out_action);
+        set_accels_for_action("app.zoom_out", KEY_COMBINATION_ZOOM_OUT);
+        
+        SimpleAction zoom_reset_action = new SimpleAction("zoom_reset", null);
+        zoom_reset_action.activate.connect(() => { set_zoom(0); } );
+        add_action(zoom_reset_action);
+        set_accels_for_action("app.zoom_reset", KEY_COMBINATION_ZOOM_RESET);
+
+
         SimpleAction contacts_action = new SimpleAction("add_chat", null);
         contacts_action.activate.connect(() => {
             AddChatDialog add_chat_dialog = new AddChatDialog(stream_interactor, stream_interactor.get_accounts());
@@ -244,6 +268,9 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
     private void show_settings_window() {
         SettingsDialog dialog = new SettingsDialog();
         dialog.set_transient_for(get_active_window());
+        dialog.zoom_spinbutton_config.value_changed.connect( () => {
+            Util.force_css(window, "* { font-size: " + settings.zoom_level.to_string() + "% ;} " ); 
+        });
         dialog.present();
     }
 
diff --git a/main/src/ui/settings_dialog.vala b/main/src/ui/settings_dialog.vala
index 3635879c..c4890a86 100644
--- a/main/src/ui/settings_dialog.vala
+++ b/main/src/ui/settings_dialog.vala
@@ -5,13 +5,14 @@ namespace Dino.Ui {
 [GtkTemplate (ui = "/im/dino/Dino/settings_dialog.ui")]
 class SettingsDialog : Adw.PreferencesWindow {
 
+    [GtkChild] private unowned SpinButton zoom_spinbutton;
     [GtkChild] private unowned Switch typing_switch;
     [GtkChild] private unowned Switch marker_switch;
     [GtkChild] private unowned Switch notification_switch;
     [GtkChild] private unowned Switch emoji_switch;
 
     Dino.Entities.Settings settings = Dino.Application.get_default().settings;
-
+    public Adjustment zoom_spinbutton_config;
     public SettingsDialog() {
         Object();
 
@@ -19,11 +20,14 @@ class SettingsDialog : Adw.PreferencesWindow {
         marker_switch.active = settings.send_marker;
         notification_switch.active = settings.notifications;
         emoji_switch.active = settings.convert_utf8_smileys;
+        zoom_spinbutton_config = new Adjustment((double) settings.zoom_level, 0.0, 300.0, 1.0, 5.0, 0.0);
+        zoom_spinbutton.set_adjustment(zoom_spinbutton_config);
 
         typing_switch.notify["active"].connect(() => { settings.send_typing = typing_switch.active; } );
         marker_switch.notify["active"].connect(() => { settings.send_marker = marker_switch.active; } );
         notification_switch.notify["active"].connect(() => { settings.notifications = notification_switch.active; } );
         emoji_switch.notify["active"].connect(() => { settings.convert_utf8_smileys = emoji_switch.active; });
+        zoom_spinbutton.value_changed.connect(() => { settings.zoom_level = zoom_spinbutton.get_value_as_int(); });
     }
 }