From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- widget/windows/nsColorPicker.cpp | 212 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 212 insertions(+) create mode 100644 widget/windows/nsColorPicker.cpp (limited to 'widget/windows/nsColorPicker.cpp') diff --git a/widget/windows/nsColorPicker.cpp b/widget/windows/nsColorPicker.cpp new file mode 100644 index 000000000..777169f97 --- /dev/null +++ b/widget/windows/nsColorPicker.cpp @@ -0,0 +1,212 @@ +/* -*- 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 + +#include "mozilla/AutoRestore.h" +#include "nsIWidget.h" +#include "nsString.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; + + char16_t 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.Assign('#'); + aResult.Append(ToHexString(r)); + aResult.Append(ToHexString(g)); + aResult.Append(ToHexString(b)); +} +} // namespace + +static AsyncColorChooser* gColorChooser; + +AsyncColorChooser::AsyncColorChooser(COLORREF aInitialColor, + nsIWidget* aParentWidget, + nsIColorPickerShownCallback* aCallback) + : mInitialColor(aInitialColor) + , mColor(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"); + + // Allow only one color picker to be opened at a time, to workaround bug 944737 + if (!gColorChooser) { + mozilla::AutoRestore restoreColorChooser(gColorChooser); + gColorChooser = this; + + 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 | CC_ENABLEHOOK; + options.rgbResult = mInitialColor; + options.lpCustColors = sCustomColors; + options.lpfnHook = HookProc; + + mColor = ChooseColor(&options) ? options.rgbResult : mInitialColor; + } else { + NS_WARNING("Currently, it's not possible to open more than one color " + "picker at a time"); + mColor = mInitialColor; + } + + if (mCallback) { + nsAutoString colorStr; + BGRIntToRGBString(mColor, colorStr); + mCallback->Done(colorStr); + } + + return NS_OK; +} + +void +AsyncColorChooser::Update(COLORREF aColor) +{ + if (mColor != aColor) { + mColor = aColor; + + nsAutoString colorStr; + BGRIntToRGBString(mColor, colorStr); + mCallback->Update(colorStr); + } +} + +/* static */ UINT_PTR CALLBACK +AsyncColorChooser::HookProc(HWND aDialog, UINT aMsg, + WPARAM aWParam, LPARAM aLParam) +{ + if (!gColorChooser) { + return 0; + } + + if (aMsg == WM_CTLCOLORSTATIC) { + // The color picker does not expose a proper way to retrieve the current + // color, so we need to obtain it from the static control displaying the + // current color instead. + const int kCurrentColorBoxID = 709; + if ((HWND)aLParam == GetDlgItem(aDialog, kCurrentColorBoxID)) { + gColorChooser->Update(GetPixel((HDC)aWParam, 0, 0)); + } + } + + return 0; +} + +/////////////////////////////////////////////////////////////////////////////// +// nsIColorPicker + +nsColorPicker::nsColorPicker() +{ +} + +nsColorPicker::~nsColorPicker() +{ +} + +NS_IMPL_ISUPPORTS(nsColorPicker, nsIColorPicker) + +NS_IMETHODIMP +nsColorPicker::Init(mozIDOMWindowProxy* parent, + const nsAString& title, + const nsAString& aInitialColor) +{ + NS_PRECONDITION(parent, + "Null parent passed to colorpicker, no color picker for you!"); + mParentWidget = WidgetUtils::DOMWindowToWidget(nsPIDOMWindowOuter::From(parent)); + mInitialColor = ColorStringToRGB(aInitialColor); + return NS_OK; +} + +NS_IMETHODIMP +nsColorPicker::Open(nsIColorPickerShownCallback* aCallback) +{ + NS_ENSURE_ARG(aCallback); + nsCOMPtr event = new AsyncColorChooser(mInitialColor, + mParentWidget, + aCallback); + return NS_DispatchToMainThread(event); +} -- cgit v1.2.3