win: Reserve border space for maximized frameless window

Fixes #732.

atom/browser/native_window_views.cc

@@ -221,7 +221,7 @@ NativeWindowViews::NativeWindowViews(content::WebContents* web_contents,
 #endif
 
   // Add web view.
-  SetLayoutManager(new MenuLayout(kMenuBarHeight));
+  SetLayoutManager(new MenuLayout(this, kMenuBarHeight));
   set_background(views::Background::CreateStandardPanelBackground());
   AddChildView(web_view_);
 

atom/browser/ui/views/menu_layout.cc

@@ -4,16 +4,47 @@
 
 #include "atom/browser/ui/views/menu_layout.h"
 
+#if defined(OS_WIN)
+#include "atom/browser/native_window_views.h"
+#endif
+
 namespace atom {
 
-MenuLayout::MenuLayout(int menu_height)
-    : menu_height_(menu_height) {
+namespace {
+
+#if defined(OS_WIN)
+gfx::Rect SubstractBorderSize(gfx::Rect bounds) {
+  int border_width = GetSystemMetrics(SM_CXSIZEFRAME) - 1;
+  int border_height = GetSystemMetrics(SM_CYSIZEFRAME) - 1;
+  bounds.set_x(bounds.x() + border_width);
+  bounds.set_y(bounds.y() + border_height);
+  bounds.set_width(bounds.width() - 2 * border_width);
+  bounds.set_height(bounds.height() - 2 * border_height);
+  return bounds;
+}
+#endif
+
+}  // namespace
+
+MenuLayout::MenuLayout(NativeWindowViews* window, int menu_height)
+    : window_(window),
+      menu_height_(menu_height) {
 }
 
 MenuLayout::~MenuLayout() {
 }
 
 void MenuLayout::Layout(views::View* host) {
+#if defined(OS_WIN)
+  // Reserve border space for maximized frameless window so we won't have the
+  // content go outside of screen.
+  if (!window_->has_frame() && window_->IsMaximized()) {
+    gfx::Rect bounds = SubstractBorderSize(host->GetContentsBounds());
+    host->child_at(0)->SetBoundsRect(bounds);
+    return;
+  }
+#endif
+
   if (!HasMenu(host)) {
     views::FillLayout::Layout(host);
     return;

atom/browser/ui/views/menu_layout.h

@@ -9,9 +9,11 @@
 
 namespace atom {
 
+class NativeWindowViews;
+
 class MenuLayout : public views::FillLayout {
  public:
-  explicit MenuLayout(int menu_height);
+  MenuLayout(NativeWindowViews* window, int menu_height);
   virtual ~MenuLayout();
 
   // views::LayoutManager:
@@ -23,6 +25,7 @@ class MenuLayout : public views::FillLayout {
  private:
   bool HasMenu(const views::View* host) const;
 
+  NativeWindowViews* window_;
   int menu_height_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuLayout);