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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 | ||
| From: Heilig Benedek <[email protected]> | ||
| Date: Thu, 20 Sep 2018 17:47:54 -0700 | ||
| Subject: disable-redraw-lock.patch | ||
|
|
||
| Chromium uses a custom window titlebar implementation on Windows when DWM | ||
| is disabled (Windows 7 and earlier, non Aero theme). The native titlebar | ||
| sometimes painted over this custom titlebar, so a workaround was put in | ||
| place to lock redraws in reaction to certain events if DWM is disabled, | ||
| since the code assumes that in that case, the custom titlebar is painted. | ||
| Electron forces the use of the native titlebar, which the workaround doesn't | ||
| take into account, and still locks redraws, causing weird repainting issues | ||
| in electron (and other applications). This patch provides a way to disable | ||
| the redraw locking mechanism, which fixes these issues. The electron issue | ||
| can be found at https://github.com/electron/electron/issues/1821 | ||
|
|
||
| diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc | ||
| index ec39cb0d15c80f051e89bf4d0f05368dff897fa7..472090adb19411366c50ed8e5a2f1276bc0a47eb 100644 | ||
| --- a/ui/views/win/hwnd_message_handler.cc | ||
| +++ b/ui/views/win/hwnd_message_handler.cc | ||
| @@ -311,6 +311,10 @@ constexpr int kSynthesizedMouseMessagesTimeDifference = 500; | ||
|
|
||
| } // namespace | ||
|
|
||
| +bool HWNDMessageHandlerDelegate::HasNativeFrame() const { | ||
| + return false; | ||
| +} | ||
| + | ||
| // A scoping class that prevents a window from being able to redraw in response | ||
| // to invalidations that may occur within it for the lifetime of the object. | ||
| // | ||
| @@ -361,7 +365,8 @@ class HWNDMessageHandler::ScopedRedrawLock { | ||
| hwnd_(owner_->hwnd()), | ||
| cancel_unlock_(false), | ||
| should_lock_(owner_->IsVisible() && !owner->HasChildRenderingWindow() && | ||
| - ::IsWindow(hwnd_) && !owner_->IsHeadless() && | ||
| + ::IsWindow(hwnd_) && !owner_->HasNativeFrame() && | ||
| + !owner_->IsHeadless() && | ||
| (!(GetWindowLong(hwnd_, GWL_STYLE) & WS_CAPTION) || | ||
| !ui::win::IsAeroGlassEnabled())) { | ||
| if (should_lock_) | ||
| @@ -1057,6 +1062,10 @@ HWNDMessageHandler::RegisterUnadjustedMouseEvent() { | ||
| return scoped_enable; | ||
| } | ||
|
|
||
| +bool HWNDMessageHandler::HasNativeFrame() { | ||
| + return delegate_->HasNativeFrame(); | ||
| +} | ||
| + | ||
| //////////////////////////////////////////////////////////////////////////////// | ||
| // HWNDMessageHandler, gfx::WindowImpl overrides: | ||
|
|
||
| diff --git a/ui/views/win/hwnd_message_handler.h b/ui/views/win/hwnd_message_handler.h | ||
| index e93d1727cbd8263d3b68e539856a577585a6092c..6d0adb7b5febc5625073312e7f1d557f89927ac8 100644 | ||
| --- a/ui/views/win/hwnd_message_handler.h | ||
| +++ b/ui/views/win/hwnd_message_handler.h | ||
| @@ -210,6 +210,8 @@ class VIEWS_EXPORT HWNDMessageHandler : public gfx::WindowImpl, | ||
| using TouchIDs = std::set<DWORD>; | ||
| enum class DwmFrameState { kOff, kOn }; | ||
|
|
||
| + bool HasNativeFrame(); | ||
| + | ||
| // Overridden from WindowImpl: | ||
| HICON GetDefaultWindowIcon() const override; | ||
| HICON GetSmallWindowIcon() const override; | ||
| diff --git a/ui/views/win/hwnd_message_handler_delegate.h b/ui/views/win/hwnd_message_handler_delegate.h | ||
| index 08e46c7b92f6cbe95c9cb524d09a6ed9e89ecf00..233dd12f86c20a7f5169caab998993f614e8bc7e 100644 | ||
| --- a/ui/views/win/hwnd_message_handler_delegate.h | ||
| +++ b/ui/views/win/hwnd_message_handler_delegate.h | ||
| @@ -46,6 +46,8 @@ class VIEWS_EXPORT HWNDMessageHandlerDelegate { | ||
| // True if the widget associated with this window has a non-client view. | ||
| virtual bool HasNonClientView() const = 0; | ||
|
|
||
| + virtual bool HasNativeFrame() const; | ||
| + | ||
| // Returns who we want to be drawing the frame. Either the system (Windows) | ||
| // will handle it or Chrome will custom draw it. | ||
| virtual FrameMode GetFrameMode() const = 0; |
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