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/* -*- 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);
}
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