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comparison: widget/windows/nsColorPicker.cpp
widget/windows/nsColorPicker.cpp
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "nsColorPicker.h" | |
| 8 | |
| 9 #include <shlwapi.h> | |
| 10 | |
| 11 #include "mozilla/AutoRestore.h" | |
| 12 #include "nsIWidget.h" | |
| 13 #include "WidgetUtils.h" | |
| 14 | |
| 15 using namespace mozilla::widget; | |
| 16 | |
| 17 namespace | |
| 18 { | |
| 19 // Manages NS_NATIVE_TMP_WINDOW child windows. NS_NATIVE_TMP_WINDOWs are | |
| 20 // temporary child windows of mParentWidget created to address RTL issues | |
| 21 // in picker dialogs. We are responsible for destroying these. | |
| 22 class AutoDestroyTmpWindow | |
| 23 { | |
| 24 public: | |
| 25 explicit AutoDestroyTmpWindow(HWND aTmpWnd) : | |
| 26 mWnd(aTmpWnd) { | |
| 27 } | |
| 28 | |
| 29 ~AutoDestroyTmpWindow() { | |
| 30 if (mWnd) | |
| 31 DestroyWindow(mWnd); | |
| 32 } | |
| 33 | |
| 34 inline HWND get() const { return mWnd; } | |
| 35 private: | |
| 36 HWND mWnd; | |
| 37 }; | |
| 38 | |
| 39 static DWORD ColorStringToRGB(const nsAString& aColor) | |
| 40 { | |
| 41 DWORD result = 0; | |
| 42 | |
| 43 for (uint32_t i = 1; i < aColor.Length(); ++i) { | |
| 44 result *= 16; | |
| 45 | |
| 46 char16_t c = aColor[i]; | |
| 47 if (c >= '0' && c <= '9') { | |
| 48 result += c - '0'; | |
| 49 } else if (c >= 'a' && c <= 'f') { | |
| 50 result += 10 + (c - 'a'); | |
| 51 } else { | |
| 52 result += 10 + (c - 'A'); | |
| 53 } | |
| 54 } | |
| 55 | |
| 56 DWORD r = result & 0x00FF0000; | |
| 57 DWORD g = result & 0x0000FF00; | |
| 58 DWORD b = result & 0x000000FF; | |
| 59 | |
| 60 r = r >> 16; | |
| 61 b = b << 16; | |
| 62 | |
| 63 result = r | g | b; | |
| 64 | |
| 65 return result; | |
| 66 } | |
| 67 | |
| 68 static nsString ToHexString(BYTE n) | |
| 69 { | |
| 70 nsString result; | |
| 71 if (n <= 0x0F) { | |
| 72 result.Append('0'); | |
| 73 } | |
| 74 result.AppendInt(n, 16); | |
| 75 return result; | |
| 76 } | |
| 77 | |
| 78 | |
| 79 static void | |
| 80 BGRIntToRGBString(DWORD color, nsAString& aResult) | |
| 81 { | |
| 82 BYTE r = GetRValue(color); | |
| 83 BYTE g = GetGValue(color); | |
| 84 BYTE b = GetBValue(color); | |
| 85 | |
| 86 aResult.AssignLiteral("#"); | |
| 87 aResult.Append(ToHexString(r)); | |
| 88 aResult.Append(ToHexString(g)); | |
| 89 aResult.Append(ToHexString(b)); | |
| 90 } | |
| 91 } // anonymous namespace | |
| 92 | |
| 93 AsyncColorChooser::AsyncColorChooser(const nsAString& aInitialColor, | |
| 94 nsIWidget* aParentWidget, | |
| 95 nsIColorPickerShownCallback* aCallback) | |
| 96 : mInitialColor(aInitialColor) | |
| 97 , mParentWidget(aParentWidget) | |
| 98 , mCallback(aCallback) | |
| 99 { | |
| 100 } | |
| 101 | |
| 102 NS_IMETHODIMP | |
| 103 AsyncColorChooser::Run() | |
| 104 { | |
| 105 static COLORREF sCustomColors[16] = {0} ; | |
| 106 | |
| 107 MOZ_ASSERT(NS_IsMainThread(), | |
| 108 "Color pickers can only be opened from main thread currently"); | |
| 109 | |
| 110 static bool sColorPickerOpen = false; | |
| 111 // Allow only one color picker to be opened at a time, to workaround bug 944737 | |
| 112 if (!sColorPickerOpen) { | |
| 113 mozilla::AutoRestore<bool> autoRestoreColorPickerOpen(sColorPickerOpen); | |
| 114 sColorPickerOpen = true; | |
| 115 | |
| 116 AutoDestroyTmpWindow adtw((HWND) (mParentWidget.get() ? | |
| 117 mParentWidget->GetNativeData(NS_NATIVE_TMP_WINDOW) : nullptr)); | |
| 118 | |
| 119 CHOOSECOLOR options; | |
| 120 options.lStructSize = sizeof(options); | |
| 121 options.hwndOwner = adtw.get(); | |
| 122 options.Flags = CC_RGBINIT | CC_FULLOPEN; | |
| 123 options.rgbResult = ColorStringToRGB(mInitialColor); | |
| 124 options.lpCustColors = sCustomColors; | |
| 125 | |
| 126 if (ChooseColor(&options)) { | |
| 127 BGRIntToRGBString(options.rgbResult, mColor); | |
| 128 } | |
| 129 } else { | |
| 130 NS_WARNING("Currently, it's not possible to open more than one color " | |
| 131 "picker at a time"); | |
| 132 mColor = mInitialColor; | |
| 133 } | |
| 134 | |
| 135 if (mCallback) { | |
| 136 mCallback->Done(mColor); | |
| 137 } | |
| 138 | |
| 139 return NS_OK; | |
| 140 } | |
| 141 | |
| 142 /////////////////////////////////////////////////////////////////////////////// | |
| 143 // nsIColorPicker | |
| 144 | |
| 145 nsColorPicker::nsColorPicker() | |
| 146 { | |
| 147 } | |
| 148 | |
| 149 nsColorPicker::~nsColorPicker() | |
| 150 { | |
| 151 } | |
| 152 | |
| 153 NS_IMPL_ISUPPORTS(nsColorPicker, nsIColorPicker) | |
| 154 | |
| 155 NS_IMETHODIMP | |
| 156 nsColorPicker::Init(nsIDOMWindow* parent, | |
| 157 const nsAString& title, | |
| 158 const nsAString& aInitialColor) | |
| 159 { | |
| 160 NS_PRECONDITION(parent, | |
| 161 "Null parent passed to colorpicker, no color picker for you!"); | |
| 162 mParentWidget = WidgetUtils::DOMWindowToWidget(parent); | |
| 163 mInitialColor = aInitialColor; | |
| 164 return NS_OK; | |
| 165 } | |
| 166 | |
| 167 NS_IMETHODIMP | |
| 168 nsColorPicker::Open(nsIColorPickerShownCallback* aCallback) | |
| 169 { | |
| 170 NS_ENSURE_ARG(aCallback); | |
| 171 nsCOMPtr<nsIRunnable> event = new AsyncColorChooser(mInitialColor, mParentWidget, aCallback); | |
| 172 return NS_DispatchToMainThread(event); | |
| 173 } |
