Bug 543910 - nsILookAndFeel support for detecting common windows themes. r=neil, a=final.

widget/public/nsILookAndFeel.h

@@ -303,9 +303,27 @@ public:
     /**
      * If this metric != 0, support window dragging on the menubar.
      */
-    eMetric_MenuBarDrag
+    eMetric_MenuBarDrag,
+    /**
+     * Return the appropriate WindowsThemeIdentifier for the current theme.
+     */
+    eMetric_WindowsThemeIdentifier
   } nsMetricID;
 
+  /**
+   * Windows themes we currently detect.
+   */
+  enum WindowsThemeIdentifier {
+    eWindowsTheme_Generic = 0, // unrecognized theme
+    eWindowsTheme_Classic,
+    eWindowsTheme_Aero,
+    eWindowsTheme_LunaBlue,
+    eWindowsTheme_LunaOlive,
+    eWindowsTheme_LunaSilver,
+    eWindowsTheme_Royale,
+    eWindowsTheme_Zune
+  };
+
   enum {
     eMetric_ScrollArrowStartBackward = 0x1000,
     eMetric_ScrollArrowStartForward = 0x0100,

widget/src/android/nsLookAndFeel.cpp

@@ -368,6 +368,7 @@ nsLookAndFeel::GetMetric(const nsMetricID aID, PRInt32 &aMetric)
         case eMetric_WindowsDefaultTheme:
         case eMetric_TouchEnabled:
         case eMetric_MaemoClassic:
+        case eMetric_WindowsThemeIdentifier:
             aMetric = 0;
             rv = NS_ERROR_NOT_IMPLEMENTED;
             break;

widget/src/cocoa/nsLookAndFeel.mm

@@ -382,6 +382,7 @@ NS_IMETHODIMP nsLookAndFeel::GetMetric(const nsMetricID aID, PRInt32 & aMetric)
     case eMetric_WindowsDefaultTheme:
     case eMetric_TouchEnabled:
     case eMetric_MaemoClassic:
+    case eMetric_WindowsThemeIdentifier:
       aMetric = 0;
       res = NS_ERROR_NOT_IMPLEMENTED;
       break;

widget/src/gtk2/nsLookAndFeel.cpp

@@ -513,6 +513,7 @@ NS_IMETHODIMP nsLookAndFeel::GetMetric(const nsMetricID aID, PRInt32 & aMetric)
     case eMetric_DWMCompositor:
     case eMetric_WindowsClassic:
     case eMetric_WindowsDefaultTheme:
+    case eMetric_WindowsThemeIdentifier:
         aMetric = 0;
         res = NS_ERROR_NOT_IMPLEMENTED;
         break;

widget/src/os2/nsLookAndFeel.cpp

@@ -325,6 +325,7 @@ NS_IMETHODIMP nsLookAndFeel::GetMetric(const nsMetricID aID, PRInt32 & aMetric)
     case eMetric_WindowsClassic:
     case eMetric_WindowsDefaultTheme:
     case eMetric_TouchEnabled:
+    case eMetric_WindowsThemeIdentifier:
         aMetric = 0;
         res = NS_ERROR_NOT_IMPLEMENTED;
         break;

widget/src/windows/nsLookAndFeel.cpp

@@ -450,42 +450,10 @@ NS_IMETHODIMP nsLookAndFeel::GetMetric(const nsMetricID aID, PRInt32 & aMetric)
 #endif
         break;
     case eMetric_WindowsDefaultTheme:
-        aMetric = 0;
-#ifndef WINCE
-        if (nsUXThemeData::getCurrentThemeName) {
-          WCHAR themeFileName[MAX_PATH + 1] = {L'\0'};
-          HRESULT hresult =
-            nsUXThemeData::getCurrentThemeName(themeFileName, MAX_PATH,
-                                                            NULL, 0, NULL, 0);
-
-          // WIN2K and earlier will not have getCurrentThemeName defined, so
-          // they will never make it this far.  Unless we want to save 6.0
-          // users a handful of clock cycles by skipping checks for the
-          // 5.x themes (or vice-versa), we can use a single loop for all
-          // the different Windows versions.
-          if (hresult == S_OK && nsWindow::GetWindowsVersion() <= WIN7_VERSION) {
-            LPCWSTR defThemes[] = {
-              L"luna.msstyles",
-              L"aero.msstyles"
-            };
-
-            LPWSTR curTheme = wcsrchr(themeFileName, L'\\');
-            curTheme = curTheme ? curTheme + 1 : themeFileName;
-
-            for (unsigned i = 0; i < NS_ARRAY_LENGTH(defThemes); ++i) {
-              if (!lstrcmpiW(curTheme, defThemes[i])) {
-                aMetric = 1;
-              }
-            }
-          } else {
-            res = NS_ERROR_NOT_IMPLEMENTED;
-          }
-        }
-        else
-#endif /* WINCE */
-        {
-          res = NS_ERROR_NOT_IMPLEMENTED;
-        }
+        aMetric = nsUXThemeData::IsDefaultWindowTheme();
+        break;
+    case eMetric_WindowsThemeIdentifier:
+        aMetric = nsUXThemeData::GetNativeThemeId();
         break;
     case eMetric_MacGraphiteTheme:
     case eMetric_MaemoClassic:

widget/src/windows/nsUXThemeData.cpp

@@ -23,6 +23,7 @@
  *
  * Contributor(s):
  *   Rob Arnold <robarnold@mozilla.com> (Original Author)
+ *   Jim Mathies <jmathies@mozilla.com>
  *
  * Alternatively, the contents of this file may be used under the terms of
  * either of the GNU General Public License Version 2 or later (the "GPL"),
@@ -336,3 +337,127 @@ nsUXThemeData::UpdateTitlebarInfo(HWND aWnd)
 
   sTitlebarInfoPopulated = PR_TRUE;
 }
+
+// visual style (aero glass, aero basic)
+//    theme (aero, luna, zune)
+//      theme color (silver, olive, blue)
+//        system colors
+
+struct THEMELIST {
+  LPCWSTR name;
+  int type;
+};
+
+const THEMELIST knownThemes[] = {
+  { L"aero.msstyles", WINTHEME_AERO },
+  { L"luna.msstyles", WINTHEME_LUNA },
+  { L"zune.msstyles", WINTHEME_ZUNE },
+  { L"royale.msstyles", WINTHEME_ROYALE }
+};
+
+const THEMELIST knownColors[] = {
+  { L"normalcolor", WINTHEMECOLOR_NORMAL },
+  { L"homestead",   WINTHEMECOLOR_HOMESTEAD },
+  { L"metallic",    WINTHEMECOLOR_METALLIC }
+};
+
+nsILookAndFeel::WindowsThemeIdentifier
+nsUXThemeData::sThemeId = nsILookAndFeel::eWindowsTheme_Generic;
+
+PRBool
+nsUXThemeData::sIsDefaultWindowsTheme = PR_FALSE;
+
+// static
+nsILookAndFeel::WindowsThemeIdentifier
+nsUXThemeData::GetNativeThemeId()
+{
+  return sThemeId;
+}
+
+// static
+PRBool nsUXThemeData::IsDefaultWindowTheme()
+{
+  return sIsDefaultWindowsTheme;
+}
+
+// static
+void
+nsUXThemeData::UpdateNativeThemeInfo()
+{
+  sIsDefaultWindowsTheme = PR_FALSE;
+  sThemeId = nsILookAndFeel::eWindowsTheme_Generic;
+
+  if (!IsAppThemed() || !getCurrentThemeName) {
+    sThemeId = nsILookAndFeel::eWindowsTheme_Classic;
+    return;
+  }
+
+  WCHAR themeFileName[MAX_PATH + 1];
+  WCHAR themeColor[MAX_PATH + 1];
+  if (FAILED(getCurrentThemeName(themeFileName,
+                                 MAX_PATH,
+                                 themeColor,
+                                 MAX_PATH,
+                                 NULL, 0))) {
+    sThemeId = nsILookAndFeel::eWindowsTheme_Classic;
+    return;
+  }
+
+  LPCWSTR themeName = wcsrchr(themeFileName, L'\\');
+  themeName = themeName ? themeName + 1 : themeFileName;
+
+  WindowsTheme theme = WINTHEME_UNRECOGNIZED;
+  for (int i = 0; i < NS_ARRAY_LENGTH(knownThemes); ++i) {
+    if (!lstrcmpiW(themeName, knownThemes[i].name)) {
+      theme = (WindowsTheme)knownThemes[i].type;
+      break;
+    }
+  }
+
+  if (theme == WINTHEME_UNRECOGNIZED)
+    return;
+
+  if (theme == WINTHEME_AERO || theme == WINTHEME_LUNA)
+    sIsDefaultWindowsTheme = PR_TRUE;
+  
+  if (theme != WINTHEME_LUNA) {
+    switch(theme) {
+      case WINTHEME_AERO:
+        sThemeId = nsILookAndFeel::eWindowsTheme_Aero;
+        return;
+      case WINTHEME_ZUNE:
+        sThemeId = nsILookAndFeel::eWindowsTheme_Zune;
+        return;
+      case WINTHEME_ROYALE:
+        sThemeId = nsILookAndFeel::eWindowsTheme_Royale;
+        return;
+      default:
+        NS_WARNING("unhandled theme type.");
+        return;
+    }
+  }
+
+  // calculate the luna color scheme
+  WindowsThemeColor color = WINTHEMECOLOR_UNRECOGNIZED;
+  for (int i = 0; i < NS_ARRAY_LENGTH(knownColors); ++i) {
+    if (!lstrcmpiW(themeColor, knownColors[i].name)) {
+      color = (WindowsThemeColor)knownColors[i].type;
+      break;
+    }
+  }
+
+  switch(color) {
+    case WINTHEMECOLOR_NORMAL:
+      sThemeId = nsILookAndFeel::eWindowsTheme_LunaBlue;
+      return;
+    case WINTHEMECOLOR_HOMESTEAD:
+      sThemeId = nsILookAndFeel::eWindowsTheme_LunaOlive;
+      return;
+    case WINTHEMECOLOR_METALLIC:
+      sThemeId = nsILookAndFeel::eWindowsTheme_LunaSilver;
+      return;
+    default:
+      NS_WARNING("unhandled theme color.");
+      return;
+  }
+}

widget/src/windows/nsUXThemeData.h

@@ -43,6 +43,7 @@
 #include <uxtheme.h>
 
 #include "nscore.h"
+#include "nsILookAndFeel.h"
 
 #if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
 #include <dwmapi.h>
@@ -91,6 +92,22 @@ enum nsUXThemeClass {
   eUXNumClasses
 };
 
+// Native windows style constants
+enum WindowsTheme {
+  WINTHEME_UNRECOGNIZED = 0,
+  WINTHEME_CLASSIC      = 1, // no theme
+  WINTHEME_AERO         = 2,
+  WINTHEME_LUNA         = 3,
+  WINTHEME_ROYALE       = 4,
+  WINTHEME_ZUNE         = 5
+};
+enum WindowsThemeColor {
+  WINTHEMECOLOR_UNRECOGNIZED = 0,
+  WINTHEMECOLOR_NORMAL       = 1,
+  WINTHEMECOLOR_HOMESTEAD    = 2,
+  WINTHEMECOLOR_METALLIC     = 3
+};
+
 #define CMDBUTTONIDX_MINIMIZE 0
 #define CMDBUTTONIDX_RESTORE  1
 #define CMDBUTTONIDX_CLOSE    2
@@ -115,6 +132,8 @@ public:
   static PRPackedBool sHaveCompositor;
   static PRBool sTitlebarInfoPopulated;
   static SIZE sCommandButtons[3];
+  static nsILookAndFeel::WindowsThemeIdentifier sThemeId;
+  static PRBool sIsDefaultWindowsTheme;
 
   static void Initialize();
   static void Teardown();
@@ -129,6 +148,10 @@ public:
   static void InitTitlebarInfo();
   static void UpdateTitlebarInfo(HWND aWnd);
 
+  static void UpdateNativeThemeInfo();
+  static nsILookAndFeel::WindowsThemeIdentifier GetNativeThemeId();
+  static PRBool IsDefaultWindowTheme();
+
   static inline BOOL IsAppThemed() {
     return isAppThemed && isAppThemed();
   }

widget/src/windows/nsWindow.cpp

@@ -447,6 +447,8 @@ nsWindow::nsWindow() : nsBaseWidget()
 
     // Init titlebar button info for custom frames.
     nsUXThemeData::InitTitlebarInfo();
+    // Init theme data
+    nsUXThemeData::UpdateNativeThemeInfo();
   } // !sInstanceCount
 
   mIdleService = nsnull;
@@ -4541,6 +4543,7 @@ PRBool nsWindow::ProcessMessage(UINT msg, WPARAM &wParam, LPARAM &lParam,
     {
       // Update non-client margin offsets 
       UpdateNonClientMargins();
+      nsUXThemeData::UpdateNativeThemeInfo();
 
       DispatchStandardEvent(NS_THEMECHANGED);