Bug 875754 - Implement <input type="color">: Windows widget/color picker. r=jimm

widget/windows/moz.build

@@ -41,6 +41,7 @@ CPP_SOURCES += [
     'nsAppShell.cpp',
     'nsBidiKeyboard.cpp',
     'nsClipboard.cpp',
+    'nsColorPicker.cpp',
     'nsDataObj.cpp',
     'nsDataObjCollection.cpp',
     'nsDragService.cpp',

widget/windows/nsColorPicker.cpp

@@ -0,0 +1,154 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsColorPicker.h"
+
+#include <shlwapi.h>
+
+#include "nsIWidget.h"
+#include "WidgetUtils.h"
+
+using namespace mozilla::widget;
+
+namespace
+{
+// Manages NS_NATIVE_TMP_WINDOW child windows. NS_NATIVE_TMP_WINDOWs are
+// temporary child windows of mParentWidget created to address RTL issues
+// in picker dialogs. We are responsible for destroying these.
+class AutoDestroyTmpWindow
+{
+public:
+  explicit AutoDestroyTmpWindow(HWND aTmpWnd) :
+    mWnd(aTmpWnd) {
+  }
+
+  ~AutoDestroyTmpWindow() {
+    if (mWnd)
+      DestroyWindow(mWnd);
+  }
+
+  inline HWND get() const { return mWnd; }
+private:
+  HWND mWnd;
+};
+
+static DWORD ColorStringToRGB(const nsAString& aColor)
+{
+  DWORD result = 0;
+
+  for (uint32_t i = 1; i < aColor.Length(); ++i) {
+    result *= 16;
+
+    PRUnichar c = aColor[i];
+    if (c >= '0' && c <= '9') {
+      result += c - '0';
+    } else if (c >= 'a' && c <= 'f') {
+      result += 10 + (c - 'a');
+    } else {
+      result += 10 + (c - 'A');
+    }
+  }
+
+  DWORD r = result & 0x00FF0000;
+  DWORD g = result & 0x0000FF00;
+  DWORD b = result & 0x000000FF;
+
+  r = r >> 16;
+  b = b << 16;
+
+  result = r | g | b;
+
+  return result;
+}
+
+static nsString ToHexString(BYTE n)
+{
+  nsString result;
+  if (n <= 0x0F) {
+    result.Append('0');
+  }
+  result.AppendInt(n, 16);
+  return result;
+}
+
+
+static void
+BGRIntToRGBString(DWORD color, nsAString& aResult)
+{
+  BYTE r = GetRValue(color);
+  BYTE g = GetGValue(color);
+  BYTE b = GetBValue(color);
+
+  aResult.AssignLiteral("#");
+  aResult.Append(ToHexString(r));
+  aResult.Append(ToHexString(g));
+  aResult.Append(ToHexString(b));
+}
+} // anonymous namespace
+
+AsyncColorChooser::AsyncColorChooser(DWORD aInitialColor, nsIWidget* aParentWidget, nsIColorPickerShownCallback* aCallback)
+  : mInitialColor(aInitialColor)
+  , mParentWidget(aParentWidget)
+  , mCallback(aCallback)
+{
+}
+
+NS_IMETHODIMP
+AsyncColorChooser::Run()
+{
+  CHOOSECOLOR options;
+  static COLORREF customColors[16] = {0} ;
+
+  AutoDestroyTmpWindow adtw((HWND) (mParentWidget.get() ?
+    mParentWidget->GetNativeData(NS_NATIVE_TMP_WINDOW) : NULL));
+
+  options.lStructSize   = sizeof(options);
+  options.hwndOwner     = adtw.get();
+  options.Flags         = CC_RGBINIT | CC_FULLOPEN;
+  options.rgbResult     = mInitialColor;
+  options.lpCustColors  = customColors;
+
+  if (ChooseColor(&options)) {
+    BGRIntToRGBString(options.rgbResult, mColor);
+  }
+
+  if (mCallback) {
+    mCallback->Done(mColor);
+  }
+
+  return NS_OK;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// nsIColorPicker
+
+nsColorPicker::nsColorPicker()
+{
+}
+
+nsColorPicker::~nsColorPicker()
+{
+}
+
+NS_IMPL_ISUPPORTS1(nsColorPicker, nsIColorPicker)
+
+NS_IMETHODIMP
+nsColorPicker::Init(nsIDOMWindow* parent, const nsAString& title, const nsAString& aInitialColor)
+{
+  NS_PRECONDITION(parent,
+      "Null parent passed to colorpicker, no color picker for you!");
+  mParentWidget =  WidgetUtils::DOMWindowToWidget(parent);
+  mInitialColor = ColorStringToRGB(aInitialColor);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsColorPicker::Open(nsIColorPickerShownCallback* aCallback)
+{
+  NS_ENSURE_ARG(aCallback);
+  nsCOMPtr<nsIRunnable> event = new AsyncColorChooser(mInitialColor, mParentWidget, aCallback);
+  return NS_DispatchToMainThread(event);
+}

widget/windows/nsColorPicker.h

@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsColorPicker_h__
+#define nsColorPicker_h__
+
+#include <windows.h>
+#include <commdlg.h>
+
+#include "nsCOMPtr.h"
+#include "nsIColorPicker.h"
+#include "nsString.h"
+#include "nsThreadUtils.h"
+
+class nsIWidget;
+
+class AsyncColorChooser :
+  public nsRunnable
+{
+public:
+  AsyncColorChooser(DWORD aInitialColor, nsIWidget* aParentWidget, nsIColorPickerShownCallback* aCallback);
+  NS_IMETHOD Run() MOZ_OVERRIDE;
+
+private:
+  DWORD mInitialColor;
+  nsCOMPtr<nsIWidget> mParentWidget;
+  nsCOMPtr<nsIColorPickerShownCallback> mCallback;
+  nsString mColor;
+};
+
+class nsColorPicker :
+  public nsIColorPicker
+{
+public:
+  nsColorPicker();
+  virtual ~nsColorPicker();
+
+  NS_DECL_ISUPPORTS
+
+  NS_IMETHOD Init(nsIDOMWindow* parent, const nsAString& title, const nsAString& aInitialColor);
+  NS_IMETHOD Open(nsIColorPickerShownCallback* aCallback);
+
+protected:
+  DWORD mInitialColor;
+  nsCOMPtr<nsIWidget> mParentWidget;
+};
+
+#endif // nsColorPicker_h__

widget/windows/nsWidgetFactory.cpp

@@ -25,6 +25,7 @@
 #include "nsXULAppAPI.h"
 // Desktop
 #include "nsFilePicker.h" // needs to be included before other shobjidl.h includes
+#include "nsColorPicker.h"
 #include "nsNativeThemeWin.h"
 #include "nsWindow.h"
 // Content processes
@@ -125,6 +126,31 @@ FilePickerConstructor(nsISupports *aOuter, REFNSIID aIID,
   return picker->QueryInterface(aIID, aResult);
 }
 
+static nsresult
+ColorPickerConstructor(nsISupports *aOuter, REFNSIID aIID,
+                       void **aResult)
+{
+  *aResult = nullptr;
+  if (aOuter != nullptr) {
+    return NS_ERROR_NO_AGGREGATION;
+  }
+  nsCOMPtr<nsIColorPicker> picker;
+
+  if (XRE_GetWindowsEnvironment() == WindowsEnvironmentType_Metro) {
+#ifdef MOZ_METRO
+    // TODO
+    // picker = new nsMetroColorPicker;
+    NS_ERROR("metro color picker isn't implemented currently");
+    return NS_ERROR_NO_INTERFACE;
+#else
+    NS_RUNTIMEABORT("build does not support metro.");
+#endif
+  } else {
+    picker = new nsColorPicker;
+  }
+  return picker->QueryInterface(aIID, aResult);
+}
+
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsScreenManagerWin)
 NS_GENERIC_FACTORY_SINGLETON_CONSTRUCTOR(nsIdleServiceWin, nsIdleServiceWin::GetInstance)
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsClipboard)
@@ -160,6 +186,7 @@ NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(GfxInfo, Init)
 NS_DEFINE_NAMED_CID(NS_WINDOW_CID);
 NS_DEFINE_NAMED_CID(NS_CHILD_CID);
 NS_DEFINE_NAMED_CID(NS_FILEPICKER_CID);
+NS_DEFINE_NAMED_CID(NS_COLORPICKER_CID);
 NS_DEFINE_NAMED_CID(NS_APPSHELL_CID);
 NS_DEFINE_NAMED_CID(NS_SCREENMANAGER_CID);
 NS_DEFINE_NAMED_CID(NS_GFXINFO_CID);
@@ -193,6 +220,7 @@ static const mozilla::Module::CIDEntry kWidgetCIDs[] = {
   { &kNS_WINDOW_CID, false, NULL, WindowConstructor },
   { &kNS_CHILD_CID, false, NULL, ChildWindowConstructor },
   { &kNS_FILEPICKER_CID, false, NULL, FilePickerConstructor },
+  { &kNS_COLORPICKER_CID, false, NULL, ColorPickerConstructor },
   { &kNS_APPSHELL_CID, false, NULL, nsAppShellConstructor },
   { &kNS_SCREENMANAGER_CID, false, NULL, nsScreenManagerWinConstructor },
   { &kNS_GFXINFO_CID, false, NULL, GfxInfoConstructor },
@@ -227,6 +255,7 @@ static const mozilla::Module::ContractIDEntry kWidgetContracts[] = {
   { "@mozilla.org/widgets/window/win;1", &kNS_WINDOW_CID },
   { "@mozilla.org/widgets/child_window/win;1", &kNS_CHILD_CID },
   { "@mozilla.org/filepicker;1", &kNS_FILEPICKER_CID },
+  { "@mozilla.org/colorpicker;1", &kNS_COLORPICKER_CID },
   { "@mozilla.org/widget/appshell/win;1", &kNS_APPSHELL_CID },
   { "@mozilla.org/gfx/screenmanager;1", &kNS_SCREENMANAGER_CID },
   { "@mozilla.org/gfx/info;1", &kNS_GFXINFO_CID },