From 3c2c6790df7dd0ec516b27f1b56512ec0435686e Mon Sep 17 00:00:00 2001
From: MacDue <macdue@dueutil.tech>
Date: Fri, 10 Jun 2022 15:12:50 +0100
Subject: [PATCH] MouseSettings: Support animated cursors in the highlighting
 preview

---
 .../MouseSettings/HighlightPreviewWidget.cpp  | 19 +++++++++++++++++--
 .../MouseSettings/HighlightPreviewWidget.h    |  5 +++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/Userland/Applications/MouseSettings/HighlightPreviewWidget.cpp b/Userland/Applications/MouseSettings/HighlightPreviewWidget.cpp
index 2ee4f852a4f..1b467000ae5 100644
--- a/Userland/Applications/MouseSettings/HighlightPreviewWidget.cpp
+++ b/Userland/Applications/MouseSettings/HighlightPreviewWidget.cpp
@@ -34,6 +34,17 @@ ErrorOr<void> HighlightPreviewWidget::reload_cursor()
     auto cursor_path = String::formatted("/res/cursor-themes/{}/{}",
         cursor_theme, cursor_theme_config->read_entry("Cursor", "Arrow"));
     m_cursor_bitmap = TRY(load_bitmap(cursor_path, default_cursor_path));
+    m_cursor_params = Gfx::CursorParams::parse_from_filename(cursor_path, m_cursor_bitmap->rect().center()).constrained(*m_cursor_bitmap);
+    // Setup cursor animation:
+    if (m_cursor_params.frames() > 1 && m_cursor_params.frame_ms() > 0) {
+        m_frame_timer = Core::Timer::create_repeating(m_cursor_params.frame_ms(), [&] {
+            m_cursor_frame = (m_cursor_frame + 1) % m_cursor_params.frames();
+            update();
+        });
+        m_frame_timer->start();
+    } else {
+        m_frame_timer = nullptr;
+    }
     return {};
 }
 
@@ -46,8 +57,12 @@ void HighlightPreviewWidget::paint_preview(GUI::PaintEvent&)
         highlight_rect.center_within(frame_inner_rect());
         aa_painter.fill_ellipse(highlight_rect, m_color);
     }
-    if (m_cursor_bitmap)
-        painter.blit(m_cursor_bitmap->rect().centered_within(frame_inner_rect()).location(), *m_cursor_bitmap, m_cursor_bitmap->rect());
+    if (m_cursor_bitmap) {
+        auto cursor_rect = m_cursor_bitmap->rect();
+        if (m_cursor_params.frames() > 1)
+            cursor_rect.set_width(cursor_rect.width() / m_cursor_params.frames());
+        painter.blit(cursor_rect.centered_within(frame_inner_rect()).location(), *m_cursor_bitmap, cursor_rect.translated(m_cursor_frame * cursor_rect.width(), 0));
+    }
 }
 
 }
diff --git a/Userland/Applications/MouseSettings/HighlightPreviewWidget.h b/Userland/Applications/MouseSettings/HighlightPreviewWidget.h
index 01d4b3d5ba2..06714f13c82 100644
--- a/Userland/Applications/MouseSettings/HighlightPreviewWidget.h
+++ b/Userland/Applications/MouseSettings/HighlightPreviewWidget.h
@@ -6,8 +6,10 @@
 
 #pragma once
 
+#include <LibCore/Timer.h>
 #include <LibGUI/AbstractThemePreview.h>
 #include <LibGfx/Color.h>
+#include <LibGfx/CursorParams.h>
 
 namespace MouseSettings {
 
@@ -36,7 +38,10 @@ private:
     ErrorOr<void> reload_cursor();
 
     RefPtr<Gfx::Bitmap> m_cursor_bitmap;
+    Gfx::CursorParams m_cursor_params;
+    RefPtr<Core::Timer> m_frame_timer;
 
+    int m_cursor_frame { 0 };
     int m_radius { 0 };
     Gfx::Color m_color;
 };