From 80a869e7686adf772512069d7818bda0379190d8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonas=20Dre=C3=9Fler?= <verdre@v0yd.nl>
Date: Mon, 17 Feb 2020 19:59:31 +0100
Subject: [PATCH] dialogs: Use a smaller font-size if the title width exceeds
 the space

Since quite a few strings of dialogs provided by external programs are
not updated yet and the string freeze is already in effect, make sure we
don't break those dialogs by stripping aways large parts of the
headline.

To do that, detect if the title label is larger than the available width
and if it is, switch to a smaller font-size of 13pt. This makes sure we
still show about the same number of characters in the headline as we did
in previous releases.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/1012
---
 .../gnome-shell-sass/widgets/_dialogs.scss    |  5 +++
 js/ui/dialog.js                               | 36 ++++++++++++++++++-
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/data/theme/gnome-shell-sass/widgets/_dialogs.scss b/data/theme/gnome-shell-sass/widgets/_dialogs.scss
index 6ee2b36ae..229c54af2 100644
--- a/data/theme/gnome-shell-sass/widgets/_dialogs.scss
+++ b/data/theme/gnome-shell-sass/widgets/_dialogs.scss
@@ -42,6 +42,11 @@
     text-align: center;
     font-size: 18pt;
     font-weight: 800;
+
+    &.leightweight {
+      font-size: 13pt;
+      font-weight: 800;
+    }
   }
   .message-dialog-description { text-align: center; }
 }
diff --git a/js/ui/dialog.js b/js/ui/dialog.js
index 2aa7fc37b..694da4e15 100644
--- a/js/ui/dialog.js
+++ b/js/ui/dialog.js
@@ -1,7 +1,7 @@
 // -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
 /* exported Dialog, MessageDialogContent, ListSection, ListSectionItem */
 
-const { Clutter, GObject, Pango, St } = imports.gi;
+const { Clutter, GObject, Meta, Pango, St } = imports.gi;
 
 function _setLabel(label, value) {
     label.set({
@@ -179,10 +179,20 @@ var MessageDialogContent = GObject.registerClass({
         };
         super._init(Object.assign(defaultParams, params));
 
+        this.connect('notify::size', this._updateTitleStyle.bind(this));
+        this.connect('destroy', this._onDestroy.bind(this));
+
         this.add_child(this._title);
         this.add_child(this._description);
     }
 
+    _onDestroy() {
+        if (this._updateTitleStyleLater) {
+            Meta.later_remove(this._updateTitleStyleLater);
+            delete this._updateTitleStyleLater;
+        }
+    }
+
     get title() {
         return this._title.text;
     }
@@ -191,8 +201,32 @@ var MessageDialogContent = GObject.registerClass({
         return this._description.text;
     }
 
+    _updateTitleStyle() {
+        if (!this._title.mapped)
+            return;
+
+        this._title.ensure_style();
+        const [, titleNatWidth] = this._title.get_preferred_width(-1);
+
+        if (titleNatWidth > this.width) {
+            if (this._updateTitleStyleLater)
+                return;
+
+            this._updateTitleStyleLater = Meta.later_add(Meta.LaterType.BEFORE_REDRAW, () => {
+                this._updateTitleStyleLater = 0;
+                this._title.add_style_class_name('leightweight');
+                return false;
+            });
+        }
+
+    }
+
     set title(title) {
         _setLabel(this._title, title);
+
+        this._title.remove_style_class_name('leightweight');
+        this._updateTitleStyle();
+
         this.notify('title');
     }