From 1ab99903af910d9615f78d967365104aa5397c73 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Tue, 9 Apr 2019 17:17:30 +0200
Subject: [PATCH] WindowServer: Display the window geometry while it's being
 moved or resized.

---
 Servers/WindowServer/WSWindowManager.cpp | 13 +++++++++++++
 Servers/WindowServer/WSWindowManager.h   |  1 +
 2 files changed, 14 insertions(+)

diff --git a/Servers/WindowServer/WSWindowManager.cpp b/Servers/WindowServer/WSWindowManager.cpp
index f34bd7f0c1..c39fd58ca3 100644
--- a/Servers/WindowServer/WSWindowManager.cpp
+++ b/Servers/WindowServer/WSWindowManager.cpp
@@ -722,6 +722,7 @@ void WSWindowManager::clear_resize_candidate()
 void WSWindowManager::compose()
 {
     auto dirty_rects = move(m_dirty_rects);
+    dirty_rects.add(Rect::intersection(m_last_geometry_label_rect, m_screen_rect));
     dirty_rects.add(Rect::intersection(m_last_cursor_rect, m_screen_rect));
     dirty_rects.add(Rect::intersection(current_cursor_rect(), m_screen_rect));
 #ifdef DEBUG_COUNTERS
@@ -820,6 +821,18 @@ void WSWindowManager::compose()
         return IterationDecision::Continue;
     });
 
+    if (auto* window_being_moved_or_resized = m_drag_window ? m_drag_window.ptr() : (m_resize_window ? m_resize_window.ptr() : nullptr)) {
+        auto geometry_string = window_being_moved_or_resized->rect().to_string();
+        auto geometry_label_rect = Rect { 0, 0, font().width(geometry_string) + 16, font().glyph_height() + 10 };
+        geometry_label_rect.center_within(window_being_moved_or_resized->rect());
+        m_back_painter->fill_rect(geometry_label_rect, Color::LightGray);
+        m_back_painter->draw_rect(geometry_label_rect, Color::DarkGray);
+        m_back_painter->draw_text(geometry_label_rect, geometry_string, TextAlignment::Center);
+        m_last_geometry_label_rect = geometry_label_rect;
+    } else {
+        m_last_geometry_label_rect = { };
+    }
+
     draw_menubar();
     draw_cursor();
 
diff --git a/Servers/WindowServer/WSWindowManager.h b/Servers/WindowServer/WSWindowManager.h
index 9ad5058107..ef246537f4 100644
--- a/Servers/WindowServer/WSWindowManager.h
+++ b/Servers/WindowServer/WSWindowManager.h
@@ -172,6 +172,7 @@ private:
     ResizeDirection m_resize_direction { ResizeDirection::None };
 
     Rect m_last_cursor_rect;
+    Rect m_last_geometry_label_rect;
 
     unsigned m_compose_count { 0 };
     unsigned m_flush_count { 0 };