From be4ab59a3f2bb9829dde390db3dd8868a08840eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
Date: Fri, 2 Dec 2022 19:28:54 +0100
Subject: [PATCH] fileItem: Support .desktop files of type Link

Gio only has direct support for .desktop files of type Application.

However in the context of desktop icons (and file managers), shortcuts
of URLs are useful as well, so add explicit support for .desktop files
of type Link.
---
 extensions/desktop-icons/fileItem.js | 71 +++++++++++++++++++++++-----
 1 file changed, 60 insertions(+), 11 deletions(-)

diff --git a/extensions/desktop-icons/fileItem.js b/extensions/desktop-icons/fileItem.js
index f2f03440..1c9a1e55 100644
--- a/extensions/desktop-icons/fileItem.js
+++ b/extensions/desktop-icons/fileItem.js
@@ -239,12 +239,32 @@ var FileItem = class {
             log(`desktop-icons: File ${this._displayName} is writable by others - will not allow launching`);
 
         if (this._isDesktopFile) {
-            this._desktopFile = Gio.DesktopAppInfo.new_from_filename(this._file.get_path());
-            if (!this._desktopFile) {
-                log(`Couldn’t parse ${this._displayName} as a desktop file, will treat it as a regular file.`);
+            try {
+                const keyFile = new GLib.KeyFile();
+                keyFile.load_from_file(this._file.get_path(), GLib.KeyFileFlags.NONE);
+
+                const type = keyFile.get_string(
+                    GLib.KEY_FILE_DESKTOP_GROUP, GLib.KEY_FILE_DESKTOP_KEY_TYPE);
+                switch (type) {
+                case GLib.KEY_FILE_DESKTOP_TYPE_APPLICATION:
+                    this._desktopFile = Gio.DesktopAppInfo.new_from_keyfile(keyFile);
+                    if (!this._desktopFile) {
+                        log(`Couldn’t parse ${this._displayName} as a desktop file, will treat it as a regular file.`);
+                        this._isValidDesktopFile = false;
+                    } else {
+                        this._isValidDesktopFile = true;
+                    }
+                    break;
+                case GLib.KEY_FILE_DESKTOP_TYPE_LINK:
+                    const url = keyFile.get_string(
+                        GLib.KEY_FILE_DESKTOP_GROUP, GLib.KEY_FILE_DESKTOP_KEY_URL);
+                    if (url)
+                        this._linkFile = keyFile;
+                default: // fall-through
+                    this._isValidDesktopFile = false;
+                }
+            } catch (e) {
                 this._isValidDesktopFile = false;
-            } else {
-                this._isValidDesktopFile = true;
             }
         } else {
             this._isValidDesktopFile = false;
@@ -356,8 +376,17 @@ var FileItem = class {
         if (this._isBrokenSymlink) {
             this._icon.child = this._createEmblemedStIcon(null, 'text-x-generic');
         } else {
-            if (this.trustedDesktopFile && this._desktopFile.has_key('Icon'))
-                this._icon.child = this._createEmblemedStIcon(null, this._desktopFile.get_string('Icon'));
+            let iconName = null;
+
+            try {
+                if (this.trustedDesktopFile)
+                    iconName = this._desktopFile.get_string('Icon');
+                else if (this._linkFile)
+                    iconName = this._linkFile.get_string(GLib.KEY_FILE_DESKTOP_GROUP, GLib.KEY_FILE_DESKTOP_KEY_ICON);
+            } catch (e) {}
+
+            if (iconName)
+                this._icon.child = this._createEmblemedStIcon(null, iconName);
             else
                 this._icon.child = this._createEmblemedStIcon(this._fileInfo.get_icon(), null);
         }
@@ -411,7 +440,7 @@ var FileItem = class {
                 itemIcon.add_emblem(Gio.Emblem.new(Gio.ThemedIcon.new('emblem-unreadable')));
             else
                 itemIcon.add_emblem(Gio.Emblem.new(Gio.ThemedIcon.new('emblem-symbolic-link')));
-        } else if (this.trustedDesktopFile) {
+        } else if (this.trustedDesktopFile || this._linkFile) {
             itemIcon.add_emblem(Gio.Emblem.new(Gio.ThemedIcon.new('emblem-symbolic-link')));
         }
 
@@ -440,6 +469,12 @@ var FileItem = class {
             return;
         }
 
+        if (this._linkFile) {
+            this._openUri(this._linkFile.get_string(
+                GLib.KEY_FILE_DESKTOP_GROUP, GLib.KEY_FILE_DESKTOP_KEY_URL));
+            return;
+        }
+
         if (this._attributeCanExecute &&
            !this._isDirectory &&
            !this._isValidDesktopFile &&
@@ -449,13 +484,17 @@ var FileItem = class {
                 return;
         }
 
-        Gio.AppInfo.launch_default_for_uri_async(this.file.get_uri(),
+        this._openUri(this.file.get_uri());
+    }
+
+    _openUri(uri) {
+        Gio.AppInfo.launch_default_for_uri_async(uri,
             null, null,
             (source, result) => {
                 try {
                     Gio.AppInfo.launch_default_for_uri_finish(result);
                 } catch (e) {
-                    log('Error opening file ' + this.file.get_uri() + ': ' + e.message);
+                    log('Error opening file ' + uri + ': ' + e.message);
                 }
             }
         );
@@ -555,7 +594,9 @@ var FileItem = class {
     }
 
     canRename() {
-        return !this.trustedDesktopFile && this._fileExtra == Prefs.FileType.NONE;
+        return !this.trustedDesktopFile &&
+               !this._linkFile &&
+               this._fileExtra == Prefs.FileType.NONE;
     }
 
     _doOpenWith() {
@@ -819,6 +860,14 @@ var FileItem = class {
         if (this.trustedDesktopFile)
             return this._desktopFile.get_name();
 
+        if (this._linkFile) {
+            try {
+                const name = this._linkFile.get_string(
+                    GLib.KEY_FILE_DESKTOP_GROUP, GLib.KEY_FILE_DESKTOP_KEY_NAME);
+                return name;
+            } catch (e) {}
+        }
+
         return this._displayName || null;
     }
 
-- 
2.38.1