DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (31ec81b5d7bb)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173
/* -*- 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 "mozilla/AutoRestore.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(const nsAString& aInitialColor,
                                     nsIWidget* aParentWidget,
                                     nsIColorPickerShownCallback* aCallback)
  : mInitialColor(aInitialColor)
  , mParentWidget(aParentWidget)
  , mCallback(aCallback)
{
}

NS_IMETHODIMP
AsyncColorChooser::Run()
{
  static COLORREF sCustomColors[16] = {0} ;

  MOZ_ASSERT(NS_IsMainThread(),
      "Color pickers can only be opened from main thread currently");

  static bool sColorPickerOpen = false;
  // Allow only one color picker to be opened at a time, to workaround bug 944737
  if (!sColorPickerOpen) {
    mozilla::AutoRestore<bool> autoRestoreColorPickerOpen(sColorPickerOpen);
    sColorPickerOpen = true;

    AutoDestroyTmpWindow adtw((HWND) (mParentWidget.get() ?
      mParentWidget->GetNativeData(NS_NATIVE_TMP_WINDOW) : nullptr));

    CHOOSECOLOR options;
    options.lStructSize   = sizeof(options);
    options.hwndOwner     = adtw.get();
    options.Flags         = CC_RGBINIT | CC_FULLOPEN;
    options.rgbResult     = ColorStringToRGB(mInitialColor);
    options.lpCustColors  = sCustomColors;

    if (ChooseColor(&options)) {
      BGRIntToRGBString(options.rgbResult, mColor);
    }
  } else {
    NS_WARNING("Currently, it's not possible to open more than one color "
               "picker at a time");
    mColor = mInitialColor;
  }

  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 = 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);
}