fix: devtools allow restoring saved dock state on Windows (#39734)

* fix: devtools allow restoring saved dock state on Windows

* chore: address feedback

shell/browser/api/electron_api_web_contents.cc

@@ -2667,14 +2667,6 @@ void WebContents::OpenDevTools(gin::Arguments* args) {
     state = "detach";
   }
 
-#if BUILDFLAG(IS_WIN)
-  auto* win = static_cast<NativeWindowViews*>(owner_window());
-  // Force a detached state when WCO is enabled to match Chrome
-  // behavior and prevent occlusion of DevTools.
-  if (win && win->IsWindowControlsOverlayEnabled())
-    state = "detach";
-#endif
-
   bool activate = true;
   std::string title;
   if (args && args->Length() == 1) {

shell/browser/browser_mac.mm

@@ -40,13 +40,6 @@ namespace electron {
 
 namespace {
 
-bool IsAppRTL() {
-  const std::string& locale = g_browser_process->GetApplicationLocale();
-  base::i18n::TextDirection text_direction =
-      base::i18n::GetTextDirectionForLocaleInStartUp(locale.c_str());
-  return text_direction == base::i18n::RIGHT_TO_LEFT;
-}
-
 NSString* GetAppPathForProtocol(const GURL& url) {
   NSURL* ns_url = [NSURL
       URLWithString:base::SysUTF8ToNSString(url.possibly_invalid_spec())];

shell/browser/ui/inspectable_web_contents.cc

@@ -44,11 +44,13 @@
 #include "services/network/public/cpp/simple_url_loader_stream_consumer.h"
 #include "services/network/public/cpp/wrapper_shared_url_loader_factory.h"
 #include "shell/browser/api/electron_api_web_contents.h"
+#include "shell/browser/native_window_views.h"
 #include "shell/browser/net/asar/asar_url_loader_factory.h"
 #include "shell/browser/protocol_registry.h"
 #include "shell/browser/ui/inspectable_web_contents_delegate.h"
 #include "shell/browser/ui/inspectable_web_contents_view.h"
 #include "shell/browser/ui/inspectable_web_contents_view_delegate.h"
+#include "shell/common/application_info.h"
 #include "shell/common/platform_util.h"
 #include "third_party/blink/public/common/logging/logging_utils.h"
 #include "third_party/blink/public/common/page/page_zoom.h"
@@ -585,6 +587,23 @@ void InspectableWebContents::LoadCompleted() {
           prefs.FindString("currentDockState");
       base::RemoveChars(*current_dock_state, "\"", &dock_state_);
     }
+#if BUILDFLAG(IS_WIN)
+    auto* api_web_contents = api::WebContents::From(GetWebContents());
+    if (api_web_contents) {
+      auto* win =
+          static_cast<NativeWindowViews*>(api_web_contents->owner_window());
+      // When WCO is enabled, undock the devtools if the current dock
+      // position overlaps with the position of window controls to avoid
+      // broken layout.
+      if (win && win->IsWindowControlsOverlayEnabled()) {
+        if (IsAppRTL() && dock_state_ == "left") {
+          dock_state_ = "undocked";
+        } else if (dock_state_ == "right") {
+          dock_state_ = "undocked";
+        }
+      }
+    }
+#endif
     std::u16string javascript = base::UTF8ToUTF16(
         "UI.DockController.instance().setDockSide(\"" + dock_state_ + "\");");
     GetDevToolsWebContents()->GetPrimaryMainFrame()->ExecuteJavaScript(

shell/common/application_info.cc

@@ -4,8 +4,10 @@
 
 #include "shell/common/application_info.h"
 
+#include "base/i18n/rtl.h"
 #include "base/no_destructor.h"
 #include "base/strings/stringprintf.h"
+#include "chrome/browser/browser_process.h"
 #include "chrome/common/chrome_version.h"
 #include "content/public/common/user_agent.h"
 #include "electron/electron_version.h"
@@ -47,4 +49,11 @@ std::string GetApplicationUserAgent() {
   return content::BuildUserAgentFromProduct(user_agent);
 }
 
+bool IsAppRTL() {
+  const std::string& locale = g_browser_process->GetApplicationLocale();
+  base::i18n::TextDirection text_direction =
+      base::i18n::GetTextDirectionForLocaleInStartUp(locale.c_str());
+  return text_direction == base::i18n::RIGHT_TO_LEFT;
+}
+
 }  // namespace electron

shell/common/application_info.h

@@ -25,6 +25,8 @@ std::string GetApplicationVersion();
 // Returns the user agent of Electron.
 std::string GetApplicationUserAgent();
 
+bool IsAppRTL();
+
 #if BUILDFLAG(IS_WIN)
 PCWSTR GetRawAppUserModelID();
 bool GetAppUserModelID(ScopedHString* app_id);